Balanced insert valve

FIELD: machine building.

SUBSTANCE: group of inventions relates to the field of automation and is intended for use in industrial and housing applications for monitoring of pressure of fluid medium downstream a valve. The pressure regulation valve comprises the balanced insert valve. The balanced insert valve has a lock with the central passage. The central passage has a valve seat and a valve stem, interacting for valve opening and closing. One end of the central passage is plugged with the end plug, with blind passage for partial intake of the valve stem. The fluid medium pressure downstream the valve is transmitted into the blind passage through the hollow part of the valve stem that results in balancing of the valve stem in a lock. There is a design version for implementation of the balanced insert valve and the method of conversion of unbalanced valve into balanced valve.

EFFECT: group of inventions is aimed at increase of life expectancy, reliability and precision of valve operation.

20 cl, 3 dwg

 

The technical field to which the invention relates.

The invention generally relates to balanced valves pressure regulation and, in particular, to a balanced plug valve which can be installed in case of balanced or unbalanced control valve pressure.

The level of technology

The valves control the pressure used in a huge number of industrial and residential applications to control the pressure of the fluid behind the valve. For example, in installations for chemical processing or refineries valves pressure regulation used to control the current environment to compensate for the increase or decrease flow or other load changes to maintain a regulated pressure fluid. Similarly, the valves of the pressure control can be used in water supply valve to maintain a predetermined pressure of the fluid, which is automatically adjusted according to changes in the flow rate, for example, it may be the valve prevents scalding in the shower or water taps. The driving pressure behind the valve, the valve pressure regulating compensate for changes in flow rate for the valve. For example, increasing the flow rate for valve valve pressure regulating opening which are, to increase the flow of fluid through the valve to maintain a relatively constant pressure for the valve. On the other hand, when decreasing flow for valve valve pressure regulating closed to reduce the flow of fluid through the valve to maintain a relatively constant pressure for the valve.

Valves pressure regulation can be divided into balanced and unbalanced. Unbalanced valves usually have incoming fluid environment with high pressure on one side of the valve stem and out the fluid with low pressure on the other side of the valve stem. Unbalanced valves suffer from unwanted effect known as the fall of the input characteristics. The fall of the input characteristics is a phenomenon in which an unbalanced valve causes an unintended increase in pressure behind the valve at low pressure before the valve. This effect is undesirable, mainly because the valves of the pressure control designed to maintain a constant pressure behind the valve. Falling input characteristics associated with the influence of the fluid on the high pressure side of the valve stem, which it tends to move to the closed position. As a result, the valve must have some mechanism is to counter such effects of the fluid on the valve stem. Because the mechanism that counteracts the effects of fluid typically has a setpoint, the power produced by them, is constant, while the impact of the fluid on the inlet side of the valve stem may vary (for example, by reducing the supply of fluid or due to changes in pressure before the valve). The fall of the input characteristics is especially important for applications that have limited source of compressed fluid, such as gas cylinders, tube trailers or universal preventer firm "Hydril", since in such applications the input fluid is fixed, and therefore the pressure of incoming fluid decreases when reducing the supply.

Unbalanced valves also suffer from damage to the valve seat. In unbalanced valves with high inlet pressure of the pressure fluid acting on the large openings of the valves, movie to destroy the valve seat. As a result, unbalanced valves are not very suitable for applications with high pressures and large holes.

One way to minimize the drop of the input characteristics is to minimize the difference between the input and output pressures. Therefore, multi-stage unbalanced pressure regulators, each step of which only lowers blood pressure by a small amount, slightly affected by the attack input characteristics. Multi-stage unbalanced pressure regulators usually are well suited for applications with relatively low consumption.

To eliminate the fall of the input characteristics in applications with high costs were developed balanced valves pressure regulation. In the balanced valve portion of the pressure behind the valve is given to the impact on the part of the valve stem under the action of pressure before the valve. Thus, the valve stem of "balanced" due to uniform pressure of the fluid acting on both parts of the valve stem. The fall of the input characteristics is eliminated (or significantly reduced), because there is no difference between the forces acting on the surface of the valve stem by the pressure in front of and behind the valve seat, which lead to the displacement of the rod to the closed position. In other words, the valve stem produces very small or does not power open/close due to the pressure of the fluid medium.

Recently developed some unbalanced valves pressure regulation, which contain the filler valve. Plug valve may be a subnode of the valve. Also, the plug valve can be mounted in the housing unbalanced valve as an Assembly. Some unbalanced plug valves will gain the valve stem, the valve seat, the locking body and the filter on the high pressure side of the valve stem. Since the fluid flowing through unbalanced plug valve, filtered, it can be extended lifespan unbalanced plug valve, as well as increased reliability and accuracy. Despite the fact that such plug valves have increased the ease of installation and durability, they are limited to use for unbalanced pressure reducing valves due to operational and financial constraints.

Disclosure of inventions

Pressure reducing valve contains a balanced plug valve. Balanced plug valve has a lock with the Central channel. In the Central channel are the seat and the valve stem, which interact to open and close the valve. One end of the Central channel closed end cap, which contains a hollow channel for receiving a portion of the valve stem. The pressure of the fluid behind the valve is transmitted in a hollow channel through the hollow part of the valve stem that leads to the balancing of the valve stem in the lock.

Brief description of drawings

Figure 1 is a view in cross section of the pressure reducing valve with balanced plug valve, created in accordance with the description;

Figure 2 represents an enlarged view in poperen is m the context of a balanced plug valve, shown in figure 2; and

Figure 3 is a view in cross section of an alternative implementation of the balanced plug valve, created in accordance with the description of the invention.

Because the invention can be implemented in different variants and alternative constructions, some of the embodiments depicted in the drawings and will be described in more detail below. However, it should be understood that the invention is not limited to the specific described forms, but on the contrary includes all modifications, alternative constructions and equivalents; the corresponding entities and scope of the invention.

The implementation of the invention

According to the drawing shown in figure 1, pressure reducing valve in General is designated by the number 20. Pressure reducing valve 20 includes a valve body 22 having an inlet for the fluid medium 24 and an outlet for the fluid 26. The valve body 22 in one embodiment, the implementation may contain typical unbalanced plug valve (not shown). The cap 28 includes a spring load 30 and a mechanism for adjusting the set point 32. Balanced plug valve 40 is located in the valve body 22 between the inlet for the fluid 24 and the outlet for the fluid 26 and serves to regulate the pressure of the fluid behind the valve.

The valve 20 includes a diaphragm 50, responsible for the pressure for clapano is in the chamber 52. Aperture 50 can move in the cap 28. Figure 1 aperture 50 can move up and down and is in a position in which the force acting on the diaphragm 50 pressure side facing the fluid in the chamber 52, balanced by a force acting on the diaphragm by the spring load 30. Aperture 50 may be maintained and/or strengthened through the plate aperture 54. Plate aperture 54 at the same time supports the diaphragm 50 and acts as a mechanism for the transmission of force from the spring load 30 on the diaphragm 50. Spring load 30 is located between the plate aperture 54 and the spring 56. The adjusting screw 58 is located in the hole 60 of the cap 28. The adjusting screw 58 can be shifted in the hole 60 so that one end of the adjusting screw 58 rest on the button of the spring 56. Movement of the adjusting screw changes the position of the button of the spring 56 in the cap 28, so you can change the spring force acting on the plate aperture 54 by the spring load 30. Thus, it is possible to adjust the setpoint of the pressure reducing valve 20.

For easier adjustment of the adjusting screw 58 it can be connected to the handle 61 by means of the insert of the handle 62 and nuts 64. Access to the nut 64 can be implemented through the hole 66 in the handle 61, which may be closed by a plug 68.

As can be seen from Figure 2, balanced plug valve 40 includes a retainer 70 having an inlet for the fluid 72, an outlet for the fluid 74 and the Central channel 75, which includes the first end 77 and a second end 79. The latch 70 may contain a hole 76, opposite to the exit for the fluid 74. End cap 78 can close (and optionally sealing an opening 76. End cap 78 may include a hollow channel 80 open towards the outlet for the fluid 74. End cap 78 may also include a threaded portion 82 that communicates with a threaded part 83 on the inner surface of the retainer 70, for securing the end cap 78 above the hole 76. Alternatively, end cap 78 may be pressed into the retainer 70.

The valve seat 84 may be placed in the retainer 70 near the exit for the fluid 74. The valve stem 86 is located in the retainer 70 and can move in the Central channel 75 for engagement with the valve seat 84 to regulate the flow of fluid through the outlet for the fluid 74. The valve stem 86 includes a shaft 88 that communicates with the aperture 50 (Fig 1) to install valve stem 86 in the retainer 70. The spring 90 is located between the valve stem 86 and end cap 78 and is intended for translation of the valve stem 86 to the closed position. When the need is and opposite the end cap 78 may be installed washer 82, which serves as a seat for one end of the spring 90 and the quality of protection and support one or more seals 102. The opposite end of the spring 90 may rest against a shoulder 94 of the valve stem 86. The valve stem 86 may include a hollow Central portion 96 and angled outlet portion 98. Angled outlet portion 98 has an input side for the valve seat 84 and the output connected to the hollow Central part 96. In turn, the hollow Central portion 96 has an input connected to the output angle of the outlet portion 98, and an output that produces pressure for the valve in the cavity 100, located between the valve stem 86 and end cap 78. Angled outlet portion 98 and a hollow Central portion 96 allow for the transfer of pressure behind the valve into the cavity 100 in the end cap 78, formed in a hollow channel 80 and the valve rod 86. Thus, the valve stem 86 is becoming the core of a balanced valve, which leads to a decrease or eliminate the fall of the input characteristics and reducing the impact on the valve seat 84 by the input pressure.

The cavity 100 may be sealed with respect to the input pressure using one or more of the strips 102, such as a sealing ring located in an annular recess 103 in the deep channel 80. Similarly, the FIC is ATOR can be sealed relative to the valve body by means of one or more strips 104, such as an o-ring. Of course, you can use any other known seal depending on the use and requirements to the valve 20.

The latch 70 between the inner surface of the retainer and the valve stem 86 may be located a means of sealing, such as the filter 110. The filter 110 may be secured in the retainer 70 between the end cap 78 and the valve seat 84. The inner surface of the retainer 70 may include a first portion 120 and second portion 122. The first part 120 has a smaller diameter than the second portion 122, so that between the filter 110 and the second part 122, a gap 124, the filter 110 is held on the first part 120. Fluid may leak through the gap 124 along the filter 110, which increases the area of the filter 110, available for flow through a fluid medium.

As a result, the valve stem 86, the valve seat 84 and the spring 90 is protected from dirt and impurities through the filter 110. This increases the service life and accuracy of the pressure reducing valve 20.

The filter 110 also compresses and seals the valve seat 84 against the inner surface of the retainer 70. As a result, the valve seat 84 and the retainer 70 is not passed incoming fluid. Other means of sealing the valve seat 84 against the retainer 70, including, but not limited to, use the W individual parts (not shown) for sealing the valve seat 84 and the installation of the clamp saddle (not shown) between the valve seat 84 and the retainer 70.

In an alternative implementation, shown in Figure 3, the valve stem 86 includes a hollow stem 88. The rod 88 may also contain a hole 89. Pressure exceeding the fluid may be passed through a hole 89 in the hollow stem 88 and finally through the valve rod 86 into the cavity 100.

Unlike unbalanced plug valves of the prior art, the balanced plug valve of the present invention can be installed in a building typical of the unbalanced valve. This increases the efficiency of production and work in the field of logistics, since the same valve body can change from unbalanced valve type to the balanced valve type simply by replacing the plug valve.

In one implementation, the unbalanced pressure regulating valve can be transformed into a balanced pressure regulating valve due to: 1) withdrawal from the case of the unbalanced valve plug valve 2) insert in the valve body balanced plug valve in accordance with the present invention.

From the above, a person skilled in the art will easily understand that by using the description of the present invention, it is possible to create a pressure regulating valve with removable balanced plug valve. Furthermore, you can quickly and easily change klapa the control pressure from the unbalanced type to the balanced type.

1. The pressure regulating valve, comprising:
a valve body having an inlet and outlet for the fluid;
balanced plug valve located in the valve body between the inlet and outlet for the fluid and containing:
a retainer having a Central channel including first and second ends, an inner surface and at least one hole in the inner surface forming the inlet for the fluid;
a valve seat located in the Central channel near the first end of the Central channel;
a movable valve stem, at least partially located in the Central channel, while the movable valve stem selectively opens and closes the first end of the Central channel due to the sliding movement inside and interact with the valve seat and has a hollow Central portion;
the filter is located between the inner surface of the Central channel and the valve stem; and
the end cap located at the second end of the Central channel, closing the second end of the Central channel containing a hollow channel directed to the valve stem and receiving one end of the valve stem so that a hollow channel receives fluid from the valve seat through the hollow Central portion of the valve stem;
this end cap C is raised to a second end of the Central channel and includes a filter to the valve seat, fixing the filter in the Central channel and holding the filter and the valve stem between the end cap and the retainer and sealing the valve seat against the latch.

2. The valve according to claim 1, characterized in that it further comprises a cap attached to the valve body and containing a diaphragm and spring load.

3. The valve according to claim 2, wherein the aperture communicates with a spring for setting the position of the moving valve stem in the lock.

4. The valve according to claim 2, characterized in that the setpoint valve control pressure is regulated by changing the elastic force of the spring.

5. Balanced plug valve, comprising:
a retainer having a Central channel including first and second ends, an inner surface and at least one hole in the inner surface forming the inlet for the fluid;
a valve seat located in the Central channel near the first end of the Central channel;
a movable valve stem, at least partially located in the Central channel, while the movable valve stem selectively opens and closes the first end of the Central channel by moving inside to interact with the valve seat and has a hollow Central portion;
means of seals located between the inner surface is Yu the Central channel and the valve stem; and
the end cap located at the second end of the Central channel, closing the second end of the Central channel containing a hollow channel directed to the valve stem and receiving one end of the valve stem so that a hollow channel receives fluid from the valve seat through the hollow Central portion of the valve stem;
this end cap closes the second end of the Central channel and includes a filter to the valve seat, securing the filter in the Central channel and holding the filter and the valve stem between the end cap and retainer.

6. The valve according to claim 5, characterized in that it further comprises a held end cap spring pushing the valve stem to the valve seat.

7. The valve according to claim 6, characterized in that it further comprises a washer installed between the spring and end cap.

8. The valve according to claim 5, characterized in that the hollow channel includes an annular groove near the open end of the blind channel.

9. The valve according to claim 8, characterized in that the annular recess is installed seal held between the end cap and valve stem.

10. The valve according to claim 5, characterized in that the external surface of the end cap includes a threaded portion, with a threaded portion of the end cap cooperates with the threaded part in the morning the surface of the clamp to mount it end caps.

11. The valve according to claim 5, characterized in that it further comprises a valve stem attached to the first end of the valve stem and extending beyond the first end of the Central channel on the side of the valve seat.

12. The valve according to claim 11, characterized in that the hollow Central portion of the valve stem enters the valve seat.

13. The valve according to claim 5, characterized in that the hollow Central portion of the valve stem is connected with an angular graduation part, which communicates with the hollow Central part for supplying a fluid medium in the dull canal on the side of the valve seat.

14. The valve according to claim 5, characterized in that the inner surface of the Central channel includes first and second parts, the first part has a smaller diameter than the second

15. The valve 14, characterized in that the seal is located near the first part of the inner surface of the Central channel, and the second part of the inner surface of the Central channel forms an annular space between the filter and the inner surface of the Central channel.

16. The valve according to claim 5, characterized in that the lower end cap shrunk in the lock.

17. The way to convert unbalanced valve in a balanced valve, including:
getting unbalanced valve containing a valve body and unbalanced plug valve;
creating a balanced plug valve, contains:
a retainer having a Central channel including first and second ends, an inner surface and at least one hole in the inner surface forming the inlet for the fluid;
a valve seat located in the Central channel near the first end of the Central channel;
a movable valve stem, at least partially located in the Central channel, while the movable valve stem selectively opens and closes the first end of the Central channel due to the sliding movement inside and interact with the valve seat and has a hollow Central portion;
means of seals located between the inner surface of the Central channel and the valve stem; and
the end cap located at the second end of the Central channel, closing the second end of the Central channel, and contains a hollow channel directed to the valve stem, with a hollow channel takes one end of the valve stem so that a hollow channel receives fluid from the valve seat through the hollow Central portion of the valve stem;
this end cap closes the second end of the Central channel and includes a filter to the valve seat, securing the filter in the Central channel and holding the filter and the valve stem between the end cap is a latch;
withdrawal from the case of the unbalanced valve plug valve; and
the insert in the valve body balanced plug valve.

18. The method according to 17, wherein the step of inserting a balanced plug valve further includes screwing the outer surface of the end cap in the lock.

19. The method according to 17, characterized in that it further includes the step of venting the pressure behind the valve through the hollow Central portion of the movable valve stem in blind channel end caps.

20. The method according to 17, characterized in that it further includes the step of sealing the annular channel with the help of seals that are installed in an annular groove near the open end of the blind channel.



 

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Valve // 2476746

FIELD: machine building.

SUBSTANCE: valve contains a housing with pass channel and attachment flanges, a seat, turning shut-off member in the form of gate located in the housing in close proximity to the seat and interacting with mechanism of device actuating by reduction and/or increase of pressure, the device is located on the housing. This mechanism includes a housing and a nut. The nut by its supporting inner surface interacts with one supporting surface of high-pressure spring by thrust bearing, and by the others its supporting surface it interacts with supporting surface of sleeve. The sleeve is made with possibility of axial movement and is installed inside the housing. A bushing with possibility of axial movement is installed inside the sleeve. The bushing interacts with supporting surface of low pressure spring installed on stock. The stock is located inside the sleeve and is made with possibility of axial movement. By the other supporting surface the bushing interacts with supporting surface of the stock. The gate restraint in open position is made as a cylinder. The cylinder is made with possibility of axial movement in the tip of the stock. Spring-loaded balls are arranged in the cylinder walls with possibility of radial movement. The cylinder is installed on outer surface of the gate. The cylinder is provided with at least one annular shaped groove.

EFFECT: improving valve operating reliability.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: quick-acting safety valve includes valve body, upper casing installed on the valve body, diaphragm placed between valve body and upper casing and having the first side receiving the pressure of gas supply system. At least some part of diaphragm is provided with possibility of being displaced inside valve body and inside upper casing and includes external sealing ring, external flat section, the first rounded projection, middle flat section, the second rounded projection and internal flat section. The first and the second rounded projections are concentric. The first and the second springs are placed into inner volume of upper casing. The first and the second springs apply forces acting on the second side of diaphragm, which is opposite to the side receiving the pressure of gas supply system. Plunger is connected to the first side of diaphragm. Cam is installed so that it can be turned in inner volume of valve body. Cam has the first lever contacting the plunger. Latching mechanism is connected to the first lever. Latching mechanism has the possibility of interacting with gate of quick-acting valve. Plunger movement towards cam or from cam provides the turn of cam and release of latching mechanism. Assembly method of that valve, and quick-acting safety device are described as well.

EFFECT: enhanced operating reliability of safety devices.

18 cl, 8 dwg

Cutoff device // 2249138

FIELD: oil producing industry.

SUBSTANCE: invention relates to pipe fittings, namely, to devices with rotary shutoff member and it can be used for automatic closing of high-pressure pipes at emergency pressure rise or drop in wells of oil and condensate fields. Proposed cutoff device contains housing and rotary shutoff member installed in housing. Said member is made in form of two rotary gates, one placed on the other. One of gates is provided with discharge hole, and other gate is blind. It covers hole is discharge gate. Device is furnished with lock holding shutoff member in open position, and sensitive element. The latter is made in form of spring-loaded rod connected with lock. Lock holds discharge rotary gate with hole in open position. Blind rotary gate is provided with stop being installed for engagement with sensitive element rod through stop.

EFFECT: simplified design of cutoff device, provision of reliable operation at pressure drop or rise and overlapping of high-pressure pipeline.

2 dwg

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