Hydraulic pneumatic ram

FIELD: machine building.

SUBSTANCE: invention relates to the field of technical hydraulics. A hydraulic pneumatic ram comprises a working chamber with impact and injection valves, a discharge cap, connected with a water receiver, a discharge air duct. The hydraulic pneumatic ram is equipped with an impact valve, a pneumatic chamber connected by a pneumatic line with an air distributor. The air distributor at one side is kinematically connected to a float hinged-lever drive arranged in a control reservoir, and at the other side - with a pneumatic line with the cavity of the discharge cap via a check valve, installed as capable of opening on the stroke of injection of spent air from the pneumatic chamber. The stem of the impact valve is made with an adjustment bushing and with a limiter, and the pneumatic chamber is made with a membrane working element with a stiff centre related to the stem.

EFFECT: invention increases accuracy of control of impact valve operation mode.

3 cl, 2 dwg

 

The invention relates to the field of hydraulics and can be used for the design of water structures that use hydraulic shock, especially in automated systems in mountainous and foothill areas.

Known hydrotron containing working chamber with shock and discharge valves, air cap with the discharge pipe and the discharge pipe communicated with the tank, the extra capacity of the spring-loaded piston and check valves, additional capacitance is connected to the discharge pipe and the reservoir through check valves (USSR Author's certificate No. 1121512, CL F04F 7/02, 1983).

Lack of hydracarina is the work of the spring with the piston in aggressive water, which reduces the reliability as the frequency of the closing shock valve depends on the regulation of compression and tension springs with the piston and, consequently, of the energy overhead is also lost on the resistance to movement of water in the working chamber before ramming back and forth. In addition, the unreliability in the spring to return the piston that its elasticity is lost in time, may break, i.e. the material fatigue of the spring. The wear of the piston increases, the result is guaranteed gaps also increase and, therefore, the mind is neetsa shot strength in the pipe, perhaps sticking when moving in the water. The height of the suction in additional capacity may not be exceeded design values for a particular distance (difference) between the shock valve and level of expenditure tank as filling it happens slowly enough that it is not enough increases the performance of hydracarina. This, in turn, does not allow to obtain the desired flow of fluid to the higher areas at different fluid flow rates.

Also known hydropneumatic Taran containing working chamber with shock and discharge valves, the main air cap with the discharge pipe, the power cylinder with a piston and a check valve and capacity, additional air cap with check valve and a pipe connected with the working chamber via a check valve, and with the capacity - through the pipe, and installed after the power cylinder, the latter has a discharge duct and exhaust openings, and the shock valve is made in the form of a spring-loaded cone (USSR Author's certificate No. 1328588, CL F04F 7/02, 1985).

A disadvantage of the known hydro-pneumatic ramming is the lack of reliability of a spring-loaded truncated cone, so as a permanent work of a spring as in compression and tension cannot withstand the power load dolgovremennaya metal fatigue and breakage of the spring, working in a hostile environment. In the power cylinder is the upward movement of the piston in the slow step, there resistance on the body of the piston, which requires a great effort air pressure, that is, braking, and therefore, the delay operation of the shock valve for lifting water to a height determined by the difference between the horizons of location-pneumatic battering RAM and the working chamber. That is, reduced performance, while dynamic load on the shock valve is significant and the impact force on the tube is increased, and the regulating spring has a limited (fixed) stroke for the shock valve. The main disadvantage of that RAM cannot be recommended for long-term operation at high altitudes discharge. All of this allows us to obtain the desired flow of fluid to the higher areas and to provide work for the consumer at various costs. Taran has no fixtures systematic air flow in automatic mode, so the shock valve (node) is water.

The challenge which seeks the invention is to increase efficiency and achieved in this case the technical result is to increase the accuracy of controlling the operation mode of the shock valve.

This technical result is achieved t is m, in hydro-pneumatic RAM (containing working chamber with shock and discharge valves, pressure cap, connected to the water intake capacity, it is equipped with shock valve, pnevmoskleros connected by pneumonia with the distributor, and the distributor on the one hand kinematically connected with the float lever actuator, placed in a regulatory capacity, and pneumonia with cavity pressure unit through the check valve that is installed with the possibility of opening stroke discharge of exhaust air from pnevmostartery, and the rod of the shock valve is made with the adjusting sleeve and with the limiter, and pneumonia performed with membrane working body with a rigid center associated with the rod.

When regulatory capacity is connected in its lower part with hydroshock drive.

In addition, according to the variant execution, regulatory capacity have a drain trap, the inlet of which is placed in its lower part.

This design hydro-pneumatic ramming provides the ability to set the value of the free motion of the shock valve located in the hydraulic shock actuator associated with the rod adjusting sleeve (adjustment), with limiter and pnevmoskleros, and also allows you to adjust the strength of the surge and the frequency of C is (, and hence the volume of fluid supplied to the pressure cap. Taran has a device in the form of adjusting capacity, coupled with hydroshock-wheel drive, and is running in automatic mode with a compressor capable of generating air to fill as pnevmostartery, and to replenish the air for normal operation of the pressure unit systematically fill the specified number. This new technical solution is more reliable, and the shock valve guide rod, which makes the work Tarana more durable. Based on the requirements, pneumonia protected by a screen through which skipped the guide rod of the shock valve, which simultaneously serves as a stop. Himself of the shock valve is in the form of a flat, and when full closure is not jamming, the movement of his almost coincides with the direction of flow of fluid in the hydraulic actuator. This ensures full closure of holes in the saddle, and reduced mechanical strength of the blow valve that makes it possible to work Tarana, at a very low nutrient pressures.

During operation, ramming the supply of air in the cap is gradually reduced, the air dissolved in the water and leaves it in the discharge line. The solubility of air in water increases with increasing pressure, therefore at high discharge voltage is arts supply air of great importance. The above-mentioned task, which is aimed invention is also increasing efficiency by supplying additional air through pneumonia with non-return valve, due to exhaust air from pnevmostartery (it is economically advantageous), which increases the lifting height of water in excess of settlement for a particular level of the working chamber above the shock valve.

Efficiency Tarana is that it is of simple construction and easy to manufacture.

Figure 1 shows schematically the pneumatic RAM; figure 2 is an embodiment of a regulating tank with siphon.

Hydro-pneumatic RAM contains the working chamber 1 with the injection valve 2 and hydroshock drive. Hydroshock actuator consists of a cylinder 3, seat 4, which divides the cylinder into two cavities 5 and 6 with the shock valve 7.

Shock valve 7 with an elongated rod 8, the adjusting sleeve 9 has a limiter 10, the end of the cylinder 3 exhaust hole 11. The flow area of the holes 11 are selected in such a way that the amount received in the hole 11 is somewhat smaller volume of liquid flowing through the pipe 22 into the container 21. Shock valve 2 is connected with pnevmoskleros 12, performed with membrane working body 13 with a rigid center 14 connected with the rod 8, and pneumonia 12 connected pneumonia 15 is sugarspice 16. In the diffuser 16 is introduced source 17 and compressed air management system air terminal unit, which is equipped with the swing lever 18 connected by a hinge with the lever 19 with the float 20 is placed in the vessel 21. The tank 21 is connected by a pipe 22 with a cavity 6 of the cylinder 4 in the area of impact of the valve 2. The cap 23 is supplied with the intake valve 2, the spring loaded by a spring 24. When the cap 23 through the bore of the pipe 25 is connected to the air distributor 16 pneumonia 26 with a check valve 27 for example, the type of tube with a ball in the form of a plunger). The cap 23 is connected by a pipe 28 with the receiving tank 29. Pneumonia 12 is protected by a deflector retainer 30, and the rod is installed in the guide.

Embodiment of the vessel 21 (figure 2) has a drain siphon 31, the inlet 32 which is located in the bottom of the tank.

Hydro-pneumatic RAM operates as follows.

When you open the valve 7 water comes from the pressure of the working chamber 1 into the cylinder 3 through the saddle 4, occurs after the water in the hole 11. At the same time the water begins to flow through the tube 22 into the container 21. At this point, the float 20 is in the down position, and the rotary lever 18 closes the connection valve air distributor 16 source 17 compressed air and opens with atmosphere and pneumonia 26 with a check valve 27. At the same time the I tank 21 is filled and once the water reaches a certain (specified) filling, the float 20 raises the lever 19 and the rotary lever 18 opens the connection of the distributor 16 source 17 of compressed air. Upon admission of compressed air through the pneumatic line 15 in pnevmochamber 12, affects membrane working body 13. Hard center 14 elastic membrane acts on the rod 8, the shock valve 7 is closed, the pressure in the working chamber 1 rises, opens the discharge valve 2, water enters the cap 23 and comes tact discharge, and water moves into the receiving tank 29. At this time the water from the tank 21 through the pipe 22 flows into the cavity 6 of the cylinder 3 in the area under a shock valve 7 and flows through the opening 11. Due to this, the float 20 is lowered, the compressed air is blocked, since the rotary lever 18 opens the connection of the distributor 16 with the atmosphere and at the same time in pneumonia 26 with a check valve 27. At this point the exhaust compressed air from pnevmostartery 12 by pneumatic line 15 enters into the air distributor 16, since the pressure in the working chamber 1 is reduced, as the pressure in the cap 23 is increased, the valve 2 is closed, water flows under pressure into the cavity 5 of the cylinder 3, the shock valve 7 with the rod 8 is easy to open and limiter 10 of the rod 8 abuts against the deflector retainer 30. Membrane working body 13 pnevmostartery 12 is protected from the blow valve 7, and the water drained through obte the motor 30.

Thus, at the time of exit exhaust of compressed air to the air distributor 16, the part of it under pressure fills the cap 23 at the time of stroke discharge of water through the pipe 28 into the receiving tank 29, which also creates the displacement of water to a higher elevation, the operating mode of the pump. Then the cycle repeats.

The stroke of the shock valve 7 is set by the value of the free running it by setting the regulating sleeve 9 on the elongated rod 8 with the limiter 10. The change in free running regulated power surge and frequency of cycles, and hence the volume of water supplied to the pressure cap.

According to the variant execution figure 2 siphon 31 recharged - empty tank 21.

The advantages of design-pneumatic ramming also include the fact that the hood is regularly updated with air. Based on the fact that the supply of air during operation Tarana gradually decreases in the cap 23, which is soluble in water and leaves it in the discharge line. Thus, the solubility of air in water increases with increasing pressure, therefore at high injection pressure supply air is particularly great importance. Method automatic feed exhaust air in the hood is the most simple and economical through the small hole of the socket 5. Thus in each cycle of operation of the ramming with shock valve 7 in an air cap served a certain amount of air, and the other part (the excess air in the spool diffuser 16 is released in the atmosphere. The number of additional pumping air into the cap 23 at the end of the hammer depends on the diameter of the hole of the pipe 25 is closed with a non-return valve 27, for example, in the form of a tube with a ball. The work RAM is connected with the valve and the cap in the presence of air source through valve distributor.

The consistency Tarana is the site of the work hydroshock drive, as well as the presence of pnevmostartery and regulatory capacity. The device has wide application for mining, foothill and lowland areas with undulating terrain.

This leads to increased efficiency of the hydro-pneumatic battering RAM. The use of hydro-pneumatic ramming also extends the functionality and reduces operating costs in difficult conditions of terrain. In addition, increased levels of automation in the water lift system of land reclamation and water management. The device eliminates the possibility of clogging the holes, eliminates loss of injection air flow. When there is no need to device an additional air pump, Pat the piping set 25 can be muted on the case cap 23, end bell a tube with a ball (the design of the diffuser allows you to do it offline).

1. Hydropneumatic Taran containing working chamber with shock and discharge valves, pressure cap, connected to the water intake capacity, discharge duct, characterized in that it is equipped with shock valve, pnevmoskleros connected by pneumonia with the distributor, and the distributor on the one hand kinematically connected with the float lever actuator, placed in a regulatory capacity, and pneumonia with cavity pressure unit through a return valve opening in the quantum magnetia exhaust air from pnevmostartery, and the rod of the shock valve is made with the adjusting sleeve and with the limiter, and pneumonia performed with membrane working body with a rigid center associated with the rod.

2. Hydro-pneumatic battering RAM according to claim 1, characterized in that the regulating capacity is connected in its lower part with hydroshock drive.

3. Hydro-pneumatic battering RAM according to claim 1, characterized in that the variant of implementation, regulatory capacity have a drain trap, the inlet of which is placed in its lower part.



 

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