Valve (options)

 

(57) Abstract:

Usage: in the field of hydro and can be applied in the hydraulic systems of various mobile machines. The essence of the invention: valve, containing a number of working sections, pressure and drain lines connected in parallel to the respective pressure and drain inputs, the unit load with a supply control connected to the load line, each working section is equipped with at least one check valve connected entrance to the line, load, and exit to the desktop, the removal of this section, the unit load is made in the form of a normally closed pressure relief valve, which supply control is additionally connected through a reactor with a pressure line. Additionally, it can be equipped with a normally closed 2-linear 3-position controlled valve with two opposite podwodami control, connected to different working taps. Additionally, it can be equipped with a safety valve installed in parallel with the choke. Additionally, it can be equipped with a normally open managed 2 linear valve installed between the line load and supply management. In addition it can be provided with two normally closed valves connected to the outputs of check valves, actuators control connected to different working taps. Or it may be provided with normally open controlled valve connected by the entrance to the inlet of the unit load, and output to the drain line when the unit load is made in the form of a managed safety valve. Or it may be provided with normally open controlled valve installed in the line, additionally indicating the pressure line from the drain, the block load is made in the form of uncontrolled safety valve. Or the unit load may be in the form of a hydraulic supply regulator variable pump connected to the load line, and through the orifice to the pressure line. 4 C. and 5 C.p. f-crystals, 10 ill.

The invention relates to volumetric hydraulic drive, in particular for hydraulic equipment and can be used in hydraulic systems, road construction, forestry, agricultural and other machines.

Known valve containing a number of working sections, pressure and drain lines connected in parallel to the pressure and drain inputs workshops and the unit load (application Germany N 3420990, CL F 15 VNO high cost, large pressure loss and low efficiency.

Closest to the proposed invention is a valve of the type "LS" (Load-Sensing) firm "Rexroth", for example, the valve SP8. This dispenser contains a number of working sections, pressure and drain lines connected in parallel to the pressure and drain inputs workshops and the unit load, made in the form of pressure relief valve in the pressure section, or in the form of a supply regulator adjustable pump that increases the pump flow with increasing pressure load. In the neutral position spools workshops supply control unit load is connected to the drain line that provides unloading of the hydraulic system. When the shift valve working section of the supply management unit load through special channels in the spool and the housing of the working section is connected to the pressure outlet of the working section, which provides a constant pressure drop across the discharge slot of the valve and in the end the independence of the flow through the working section from the load. (Catalogue of the firm "MANNESMAN REXROTH Mobile Hydraulie, Components RE64001/1.88, S. 253).

This dispenser has a good regulating characteristics, a wide area regulation, "hard" expendable nature of the e and the valve operating section, for connection of the unit load from the drain line when the neutral position of the valve and the discharge outlet at its offset. In schematic images such dispensers typically, there are 6 or 7 line.

Technical problem on which this invention is directed is to simplify the design of the valve due to the exclusion of the above channels and four linear valve while maintaining the quality of the adjustment characteristics, i.e. the minimum pressure loss and power.

The specified technical task is due to the fact that the valve containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines connected in parallel to the respective pressure and drain inputs, the unit load with a supply control input connected to the pressure line, and the output to drain, and the line load, communicated with a supply control performed in such a way that each working section is provided with at least one check valve connected with the input to the load line, and access to one of the workers of taps of this section, the block agroscience is connected through a reactor with a pressure line.

Additionally, the valve can be equipped with a normally closed two-line operated three-position valve with two opposite podwodami control, connected to different working taps of this section, and installed in the load line at the inlet non-return valves, at least one of the working section.

Additionally, the valve can be equipped with a safety valve installed in parallel with the choke.

Additionally, the valve can be equipped with a normally open controlled throttle valve installed between the line load and a supply control line control valve connected to the pressure line.

And valve line load can be made in the form of two lines, each of which, through the check valves are connected to different working branches of the same business sections and between at least one of these lines load and a supply unit operating load is an additional check valve connected with the inlet to inlet control and outlet to the load line.

Additionally, the valve may be provided connected to the outputs of the inverse is od and spring inlet control is connected to a working outlet, in which it is installed opposite to the supply control to the opposite working outlet.

Or valve, containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines connected in parallel to the respective pressure and drain inputs, the unit load with a supply control input connected to the pressure line, and output to the drain and the line load may be equipped with a normally open controlled valve connected with the inlet to the supply unit operating load, and the output

to the drain line, thus the supply control valve by the spring is in communication with the line load and the opposite supply control pressure line is in communication with the line load via the inductor, in addition, each working section is equipped with at least one check valve connected with the input to the load line, and access to one of the workers of taps of this section, and the unit load is made in the form of a managed safety valve.

Or valve, containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines connected in parallel to the corresponding n-load can be equipped with a normally open controlled valve installed in the line additionally informing the pressure line from the drain, and the line load is connected to the spring inlet control valve and its opposite supply control to the pressure line is in communication with the line load via the inductor, in addition, each working section is equipped with at least one check valve connected with the input to the load line, and the output to one of the taps of the working section and the unit load is made in the form of uncontrolled safety valve.

Or valve, containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines connected in parallel to the respective pressure and drain inputs, the unit load with a supply and control line load, communicated with a supply management, may be provided with a choke installed in the hydroline, indicating the pressure line with a line load, and each working section is equipped with at least one check valve connected with the input to the line load, and access to one of the workers of taps of this section when the unit load is made in the form of a hydraulic R the I line load and reduce the pump flow by increasing the pressure in the load line.

The specified performance of valves allows the use of four valves in the working sections.

In Fig. 1 is a schematic diagram of a valve made with the unit load in the form of a normally closed pressure relief valve.

In Fig. 2, the circuit portion of the valve, made with two-line three-position normally closed controllable valve connected to the load line and operating branches.

In Fig. part 3 a schematic diagram of valve related to the execution unit load with a safety valve.

In Fig. 4 a fragment of the schematic diagram of the valve relating to the installation of in-line load normally open two-line on-off controlled valve.

In Fig. 5, a schematic diagram of valve relating to the installation of check valves in load line.

In Fig. 6 scheme options for performing the valve.

In Fig. 7 schematic diagram of the valve (option it is running).

In Fig. 8 schematic diagram of the valve with the option to execute a block of load in the form of hydraulically, concerning the installation of valves in the working taps.

In Fig. 10 fragments run different variants of the valves in Fig. 9.

The valve contains a number of working sections 1 to pressure them drain podwodami 2, 3 and work allotments 4, 5, the pressure and drain lines 6, 7 connected in parallel to the respective pressure and drain inputs 2, 3, block 8 load with a supply of 9 control, connected the input 10 to the pressure line 6 and the outlet 11 to the drain line 7 and line 12 load is in communication with the inlet 9 of the control. Each working section 1 is equipped with two check valves 13, 14, inputs connected to the line 12 of the load, and outputs to different operating branches 4, 5 of this section, the block 8 load made in the form of controlled normally closed pressure relief valve whose inlet 9 management additionally connected via the inductor 15 with the pressure line 6.

Additionally, it can be equipped with a normally closed two linear operated three-position valve 16 with two opposite podwodami 17, 8 control, connected to different working taps 4 and 5 of this section and defined in the load line 12 at the inlet non-return valves 13 and 14, at least one working successul 15.

Additionally, it can be equipped with a normally open managed two linear valve 20 installed in line 12 load before the inlet 9 of the control line 21 of the control valve 20 is in communication with the pressure line 6.

Additionally, the valve can be equipped with a normally open controlled valve 22, is connected with the inlet 23 to the inlet 9 of the control unit 8 of the load, and the output 24 to the drain line 7, thus the supply of 25 control valve 22 by the spring 26 is in communication with the load line 12, and the opposite inlet 27 is in communication with the control pressure line 6 provided with a line load via the inductor 28. Unit 8 load made in the form of a managed safety valve comprising a valve 29 controls.

Additionally, the valve can be equipped with a normally open valve 30 installed in the line 31 is additionally indicating the pressure line 6 with the drain line 7, line 12 load is connected to a spring-cart 32 of the control valve 30, and its opposite inlet 33 of the control is connected to the pressure line 6, is in communication with line 12 load via the inductor 34. Unit 8 load in this case is made in the form of uncontrolled safety valve.

In Fig. 8 shows the pump 37 performance variable, which can be connected to the valve, the block 8 load can be made in the form of the hydraulic control pump.

And also the valve can be equipped with an additional non-return valves 38 installed in each branch line 12 load in Fig. 5.

The valve of Fig. 9 and 10 may be provided connected to the outputs of the check valves 13 and 14 two normally closed valves 39, each having two inlet 17 and 18 of the control, output, and spring carts 18 control connected to a working outlet 4 or 5 in which it is installed, and the opposite inlet 17 of the control is connected to the opposite working outlet 5 or 4.

The valve according to Fig. 1 operates as follows. When the spool is in neutral and closed work taps 4 and 5 working sections 1 and relief valve 8 through the throttle 15 is opened and the working fluid freely flowing from the pressure line 6 in the drain line 7. When the differential pressure across the valve 8 and, therefore, pressure loss and minimum power determined by the valve spring 8.

When ustanovlenii 6 orifice 15 a load line 12 and check valve 13 and 14, connected to the drain slit, passes through the discharge gap in the drain line 7. Orifice valves 13 and 14 in a few times (usually 4-5 times) exceeds the orifice of the throttle 15. The pressure in line 12 load and input 9 of the control valve 8 drops, and the valve 8 is closed as long as the pressure in line 12 and input 9 of the control does not become equal to the pressure determined by the valve spring 8 (usually 3 to 10 kgf/cm2). This ensures a constant differential pressure between the load line 12, a drain inlet 3 working sections 1 and line 7 discharge under any load.

It may also be noted that one of the valves 13, 14, connected to the pressure outlet 4 and 5 of the operating section 1 is closed at this.

Described a workable option when locked in the neutral position the valve operating taps 4 and 5 (for example, when performing work section 1 scheme 44 according to GOST 24679-81).

The valve according to Fig. 2 operates as follows. When working taps 4, 5 connected in the neutral position of the valve with the drain line 7 (for example, when performing work section 1 scheme 34 according to GOST 24679-81) required additional normally closed in the middle position controlled valve 16, which has two crnas position of the valve operating section 1 line 12 load connected to the drain line 7 and consequently the valve 8 is locked, that is, the hydraulic system is not unloaded.

When valve 16 is in the neutral position of the valve operating section 1 on opposite inlets 17, 18 of the control valve 16 is supplied with the same pressure drain. The valve 16 is in the neutral position, unloading the load line 12 and the drain 7. When installing the valve operating section 1 in the working position of the valve 16 is triggered by a pressure drop in the pressure and spill carts 2 and 3, the connecting line 1 load check valves 13 and 14. The solution described can be made in the embodiments shown in Fig. 9 and 10.

The valve according to Fig. 3 operates as follows. To limit the pressure in the hydraulic system in parallel with the inductor 15 is installed relief valve 19, the input of which is connected to the pressure line 6 and the output to the input 9 of the control (or line load 12). When the excess pressure in the pressure line 6 above the set pressure of the valve 19, the last perepuskat consumption, increasing the pressure on the input 9 of the control and opening the relief valve 8. Orifice valve 19 is selected greater than the orifice check valves 13 and 14.

The valve according to Fig. 4 operates as follows. Limitation dusky 12 and inlet 9 management whose line 21 control connected with the pressure line 6. When the excess pressure in the line 6 above the set pressure of the valve 20 most recent fires, cutting off supply 9 from line 12 of the load. The pressure in the pressure line 6 through the throttle 15 opens the relief valve 8 perepiska working fluid and limiting the pressure in the pressure line 6.

The valve according to Fig. 5 operates as follows. In case of failure of valves 13 and 14 (jamming "hang" due to dirt, broken springs, etc.) can connect working taps 4 and 5 work section 1. To increase the reliability of the load line 12 is in the form of two lines that are connected through check valves 13 and 14 to different working taps 4 and 5 of the same work section 1, and each line is connected to the inlet 9 of the control through the check valve 38 prevents the flow of fluid from one working outlet 4 and 5 in the other case of failure of one of the check valves 13 and 14.

The valve according to Fig. 6 operates as follows. When execution of the block 8 load in the form of a managed safety valve additionally, the valve is further provided with a normally open operated is outinen with the drain line 7 through the valve 22 so, as work branches 4, 5 of the section 1 is locked and inlets 26, 27 of the control valve 22 is supplied with the same pressure from line 6 of the pressure on the inlet 27, a supply 26 through the orifice 28. When this fluid freely flowing through the safety valve 8 and the hydraulic system is unloaded.

When installing the valve operating section 1 in the working position, the pressure in line 12 of the load and the supply 26 management of falls and supply 27 of the control remains almost unchanged due to the inductor 28. The valve 22 cuts off supply 9 from line 7 drain valve 8 is closed and the full flow from the pressure line 6 enters the working section 1.

The valve according to Fig. 7 operates as follows. When execution of the block 8 load in the form of uncontrolled safety valve the valve is further provided with the same as above described valve 30, which connects the pressure and drain lines 6 and 7 in the neutral position of the valve, and closed work branches 4 and 5 of the working section 1 that is engaged in the unloading of the hydraulic system in neutral.

In the working position of the valve when the pressure in line 1 load and input 32 of the control valve 30 is closed and all Resham way. When execution of a block of 3 loads in the form of the hydraulic control pump 37 performance variable, and the controller is designed in such a way that increases the pump flow at reduced pressure in line 12 of the load and reduces the supply pump 37 increasing this pressure, and the dispenser is equipped with this inductor 35 is connected between the pressure line 6 and the inlet 9 directions.

When the neutral position of the valve, and closed work taps 4.5 working sections 1 at the inlet 9 of the control of the controller 8 receives the pressure in the pressure line 6. The filing of the pump minimum 37 and the hydraulic system is unloaded.

When installing the valve in the working position, i.e. open working taps 4 and 5, the pressure in line 12 load and input 9 of the control of the controller 8 moves the pumping node of the pump 37 from one position to another and thereby increases the supply pump 37 to maintain a constant pressure drop across the discharge gap of the working section 1. This difference is determined by the spring regulator and is usually equal to 3 to 10 kgf/cm2.

1. The valve containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines, which, connected the input to the pressure line, and the output to drain, and the line load, communicated with inlet control, characterized in that each working section is equipped with at least one check valve connected with the input to the load line, and access to one of the workers of taps of this section, the unit load is made in the form of controlled normally closed pressure relief valve, which supply control is additionally connected through a reactor with a pressure line.

2. The valve under item 1, characterized in that it is provided with a normally closed two-line operated three-position valve with two opposite podwodami control, connected to different working taps of this section, established in a line of input load check valves at least one of the working section.

3. The valve under item 1 or 2, characterized in that it is equipped with a safety valve installed in parallel with the choke.

4. The valve under item 1 or 2, characterized in that it is provided with a normally open controlled throttle valve installed between the line load and a supply control line control valve connected in the form of two lines, each of which, through the check valves are connected to different working branches of the same business sections, and between at least one of these lines load and a supply unit operating load is an additional check valve connected with the inlet to inlet control, outlet to the load line.

6. The valve under item 1, characterized in that it has connected to the outputs of the two check valves normally closed valves, each having two inlet control, outlet and spring inlet control is connected to a working outlet, in which it is installed, and the opposite supply management to the opposite working outlet.

7. The valve containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines connected in parallel to the respective pressure and drain inputs, the unit load with a supply control input connected to the pressure line, and the output to drain, and the line load, characterized in that it is provided with a normally open controlled valve connected with the inlet to the supply unit operating load, and the output to the drain line, thus the supply of UPRAVLENIE, communicated with line load via the inductor, in addition, each working section is equipped with at least one check valve connected with the input to the load line, and access to one of the workers of taps of this section, and the unit load is made in the form of a managed safety valve.

8. The valve containing a number of working sections with pressure and drain podwodami and working taps, pressure and drain lines connected in parallel to the respective pressure and drain inputs, the unit load input connected to the pressure line, and the output to drain, and the line load, characterized in that it is provided with a normally open controlled valve installed in the line, additionally indicating the pressure line from the drain, and the line load is connected to the spring inlet control valve and its opposite supply control to the pressure line is in communication with the line load via the inductor, in addition, each working section is provided with at least one check valve connected with the input to the load line, and access to one of the workers of taps of this section, and the unit load is made in the form of uncontrolled safety valve.

9. Gidron the cast line, connected in parallel to the respective pressure and drain inputs, the unit load with a supply and control line load provided with inlet control, characterized in that it is provided with a choke installed in the hydroline, indicating the pressure line with a line load, and each working section is provided with at least one check valve connected with the input to the load line, and access to one of the workers of taps of this section, the unit load is made in the form of a hydraulic supply regulator variable pump, increasing the pump flow at reduced pressure in the load line and reduce the pump flow by increasing the pressure in the load line.

 

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