Stacked balance valve

Abstract

The utility model discloses a stacked type balance valve which can prevent a double-acting executing element (such as a hydraulic oil cylinder and a hydraulic motor) from moving in an accelerated mode or moving out of control in the load direction when the double-acting executing element is provided with a suspended, pulled or moving load, namely the speed is not consistent with the input oil quantity (pump) (the oil cylinder is broken due to air suction). The load directions of the lifting equipment and the swinging equipment change positively and negatively; the swinging equipment swings over a dead point; as a side effect, when a reversing valve or a direction slide valve control loop leaks at a balance position, an oil cylinder piston can be prevented from accidentally disallowed displacement (two-way pressure maintaining) in the load direction. According to the utility model, the stacked intelligent module is designed, which is very convenient to overhaul, install and process problems. According to the utility model, the two sandwich valves can be quickly disassembled and assembled by adopting the mounting component and the connecting rod, so that the earlier-stage mounting, free combination and subsequent disassembly and maintenance are greatly facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to superimposed valve, balance valve, especially a kind of superimposed balance valve. BACKGROUND

[0002] For double-acting execution element (such as hydraulic cylinder, hydraulic motor etc.), in order to prevent load direction from losing control or accelerating movement, i.e. speed and input oil quantity (pump) are not consistent (hydraulic cylinder suction empty fracture), generally increase balance valve to solve, and balance valve is used to balance both sides pressure.In addition, in order to prevent safety hazard caused by sudden pressure relief of hydraulic system, generally some check valve is also increased, to prevent sudden pressure relief under load state.But at present, some balance valve, check valve, pipeline are connected to form hydraulic system, overall structure is complex, bulky, inconvenient to maintain and install.

[0003] For this, how to combine balance valve and function of preventing system failure to cause safety hazard, while also simple structure, small volume, easy to install and maintain is the technical problem to be solved at present. CONTENT OF UTILITY MODEL

[0004] In view of the above defects of prior art, the technical problem to be solved by the utility model is to provide a superimposed balance valve, which can balance system pressure, and is high in safety, high in integration and small in volume.

[0005] To achieve the above object, the utility model provides a superimposed balance valve, including first balance valve, second balance valve, A mouth and A0 mouth, B mouth and B0 mouth, second oil channel, third oil channel, fourth oil channel, fifth oil channel, sixth oil channel, first passage, second passage, first connecting channel, second connecting channel, first pilot channel, second pilot channel;

[0006] The first balance valve includes first sequence valve, first check valve, and the second balance valve includes second sequence valve, second check valve;First sequence valve, second sequence valve are respectively provided with first pilot part, second pilot part;

[0007] The third oil channel is communicated with the oil outlet of the first sequence valve, the oil inlet of the first sequence valve is communicated with the fourth oil channel, the fourth oil channel is communicated with the A0 mouth, and the third oil channel is communicated with the A mouth;The third oil channel is communicated with the oil inlet of the first check valve through the first passage, and the oil outlet of the first check valve is communicated with the pressure oil port of the first sequence valve and the fourth oil channel through the second passage respectively;

[0008] The fifth oil channel is communicated with B port, the fifth oil channel is communicated with the oil outlet of the second sequence valve, the oil inlet of the second sequence valve is communicated with the sixth oil channel, and the sixth oil channel is communicated with B0 port; the fifth oil channel is communicated with the first connecting channel, the oil inlet of the second one-way valve is communicated with the first connecting channel, the oil outlet of the second one-way valve is communicated with the second connecting channel, and the second connecting channel is communicated with the pressure oil port of the second sequence valve and the sixth oil channel;

[0009] The first channel is further communicated with the pilot oil port of the second pilot part of the second sequence valve through the first pilot channel; and the first connecting channel is further communicated with the pilot oil port of the first pilot part through the second pilot channel.

[0010] As a further improvement of the utility model, a seventh oil channel, a T port and a T0 port are further included, and the T port and the T0 port are communicated with the seventh oil channel.

[0011] As a further improvement of the utility model, a seventh oil channel, a Y port and a Y0 port are further included, and the Y port and the Y0 port are communicated with the seventh oil channel.

[0012] As a further improvement of the utility model, a second oil channel, a P port and a P0 port are further included, and the P port and the P0 port are communicated with the second oil channel.

[0013] As a further improvement of the utility model, a first oil channel, an X port and an X0 port are further included, and the X port and the X0 port are communicated with the first oil channel.

[0014] As a further improvement of the utility model, a valve body is further included, and the valve body is provided with a mounting hole and mounting grooves located on both sides of the mounting hole, a mounting assembly is mounted in the mounting grooves, and the mounting assembly is used for assembling with a connecting rod and a large end to assemble two adjacent stacked valves by the connecting rod; the diameter of the large end is larger than that of the connecting rod, so that a step is formed, and the mounting assembly is clamped by the step.

[0015] The mounting assembly includes a mounting frame, a push block, a fixed block and a cam rod, the mounting frame and the fixed block are mounted in the mounting grooves, the mounting frame is provided with a through frame groove and is further provided with a spring protrusion, the spring protrusion is assembled with one end of a tension spring, the other end of the tension spring is assembled with a push block protrusion, and the push block protrusion is assembled with the push block after passing through the frame groove.

[0016] The push block is further provided with a push block inclined surface and a push block through groove, the push block through groove is used for allowing the large end to pass through, and the push block inclined surface is attached to a fixed inclined surface; the mounting frame is further assembled with the cam rod, and the cam rod is further provided with a protruding part and a horizontal part at positions corresponding to the push block; and the distance between the horizontal part and the cam rod axis is smaller than the distance between the protruding part and the cam rod axis.

[0017] The push block is clamped and slidably mounted in the mounting frame, and the protruding part and the horizontal part are alternatively attached to the end surface of the push block.

[0018] As a further improvement of the utility model, the tension spring is in an inclined state in the direction of the end face of the push block.

[0019] As a further improvement of the utility model, the cam rod is provided with a hexagonal prism after penetrating through the mounting frame.

[0020] As a further improvement of the utility model, the positioning assembly is installed in the positioning hole of the valve body, and the positioning assembly comprises a positioning shell, a positioning block, a positioning rod, a spring and an inner tube.

[0021] The positioning block is assembled with one end of the positioning rod, one end of the positioning rod is installed in the inner tube hole, and a sliding ring is arranged on the end, the sliding ring is attached to the inner tube hole and is assembled in sliding mode.

[0022] As a further improvement of the utility model, the positioning rod penetrates through the inner tube hole after the positioning block exits the mounting hole.

[0023] The utility model has the advantages of:

[0024] The utility model can prevent the double-acting execution element (such as a hydraulic oil cylinder, a hydraulic motor and the like) from accelerating movement or motion out of control in the load direction when the double-acting execution element is used with a hanging, pulling or moving load, that is, the speed does not match the input oil quantity (pump) (the oil cylinder is broken due to suction), the lifting equipment and swing equipment (swing through the dead point) change in the load direction, the capstan car and rotary motor, and as a side effect, when the reversing valve or directional slide valve control circuit leaks in the balanced position, the piston of the oil cylinder can be prevented from moving unexpectedly and unallowably in the load direction (two-way pressure maintaining).

[0025] The installation assembly and the connecting rod can realize quick disassembly and assembly between two superimposed valves, so that the installation, free combination, disassembly, maintenance and the like are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the hydraulic system principle diagram of the utility model;

[0027] Figure 2 is the structure schematic of the utility model Figure One ;

[0028] Figure 3 is the structure schematic of the utility model Figure Two ;

[0029] Figure 4 is the structure schematic of the utility model Figure Three ;

[0030] Figure 5 is the structure schematic of the utility model Figure Four ;

[0031] Figure 6 is the utility model at the center surface where the mounting hole 301 axis is located the sectional view;

[0032] Figure 7 is the utility model at the other center surface where the mounting hole 301 axis is located the sectional view;

[0033] Figure 8 is Figure 7 enlarged view of A in the;

[0034] Figure 9 is the structure schematic of installation assembly 400, connecting rod 510 Figure One ;

[0035] Figure 10 is the structure schematic of installation assembly 400, connecting rod 510 Figure Two ;

[0036] Figure 11 is the structure schematic of installation assembly 400, connecting rod 510 Figure Three ;

[0037] Figure 12 is the structure schematic of installation assembly 400, connecting rod 510 Figure Four ;

[0038] Figure 13 is the structure schematic of installation assembly 400. DETAILED DESCRIPTION

[0039] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.

[0040] Referring to Figure 1The superimposed balance valve of the embodiment comprises a first balance valve 100, a second balance valve 200, X and X0 ports, P and P0 ports, A and A0 ports, B and B0 ports, Y and Y0 ports, a first oil passage 311, a second oil passage 312, a third oil passage 313, a fourth oil passage 314, a fifth oil passage 315, a sixth oil passage 316, a seventh oil passage 317, a first channel 321, a second channel 322, a first connecting passage 331, a second connecting passage 332, a first pilot passage 341, and a second pilot passage 342. The first balance valve 100 comprises a first sequence valve 120 and a first check valve 110, and the second balance valve 200 comprises a second sequence valve 220 and a second check valve 210. The first sequence valve 120 and the second sequence valve 220 are respectively provided with a first pilot part 121 and a second pilot part 221.

[0041] The X and X0 ports are communicated with the first oil passage 311, the P and P0 ports are communicated with the second oil passage 312, the T and T0 ports are communicated with the seventh oil passage 313, and the Y and Y0 ports are communicated with the seventh oil passage 317. The third oil passage 313 is communicated with an oil outlet of the first sequence valve 120, an oil inlet of the first sequence valve 120 is communicated with the fourth oil passage 314, the fourth oil passage 314 is communicated with the A0 port, and the third oil passage 313 is communicated with the A port. The third oil passage 313 is communicated with an oil inlet of the first check valve 110 through the first channel 321, and an oil outlet of the first check valve 110 is communicated with a pressure oil port of the first sequence valve 120 and the fourth oil passage 314 through the second channel 322.

[0042] The fifth oil passage 315 is communicated with the B port, the fifth oil passage 315 is communicated with an oil outlet of the second sequence valve 220, an oil inlet of the second sequence valve 220 is communicated with the sixth oil passage 316, the sixth oil passage 316 is communicated with the B0 port. The fifth oil passage 315 is communicated with the first connecting passage 331, an oil inlet of the second check valve 210 is communicated with the first connecting passage 331, an oil outlet of the second check valve 210 is communicated with the second connecting passage 332, and the second connecting passage 332 is communicated with a pressure oil port of the second sequence valve 220 and the sixth oil passage 316.

[0043] The first channel 321 is further communicated with a pilot oil port of the second pilot part 221 of the second sequence valve 220 through the first pilot passage 341, and the first connecting passage 331 is further communicated with a pilot oil port of the first pilot part 121 through the second pilot passage 342.

[0044] In use, the A0 port and the B0 port are connected to two oil ports of an actuator, such as the rod cavity and the rodless cavity of a hydraulic cylinder. The A port and the B port are connected to hydraulic oil and return oil, respectively. Taking the A port as the oil supply port and the B port as the return oil port as an example, the hydraulic oil of the A port opens the first one-way valve 110 and then flows into the A0 port. During this period, the first sequence valve 220 is opened through the first pilot oil passage 341, so that the B0 port and the B port return oil. Once the hydraulic pressure of the B port return oil reaches the corresponding pressure, the first sequence valve 120 is opened through the second pilot oil passage 342, and at this time, the A port increases the oil supply flow to the A0 port. During the return oil process, once the hydraulic pressure of the B0 port is large enough, the hydraulic oil enters the hydraulic oil port of the second sequence valve to open the second sequence valve, so that the pressure is kept in the balance interval, and the return oil flow can meet the actual demand. When the pressure of the A port is large enough, the first sequence valve 120 is opened through the pressure oil port of the first sequence valve to ensure sufficient supply of hydraulic oil in time. Once the hydraulic oil leaks, the hydraulic oil of the A0 port cannot pass through the first sequence valve 120 or the first one-way valve 110, and the hydraulic oil of the B0 port cannot pass through the second sequence valve 220 or the second one-way valve 210, so that the actuator cannot suddenly move or lose control, thereby improving safety. The oil supply mode of the B port and the return oil mode of the A port are basically the same as the above content, and can be understood with reference to the above content.

[0045] This double balance valve can prevent the double-acting actuator (such as a hydraulic cylinder, a hydraulic motor, etc.) from accelerating movement or motion in the load direction when the load is hanging, pulling or moving, that is, the speed does not match the input oil quantity (pump) (cylinder suction rupture); the lifting equipment and swing equipment (swing over dead center) change in the load direction; capstan car and rotary motor; as a side effect, when the reversing valve or directional slide valve control circuit leaks in the balance position, the cylinder piston (actuator) can be prevented from moving unexpectedly in the load direction (bidirectional pressure retention). At the same time, it is designed as a superimposed intelligent module (complying with international IS04401-03 installation surface standard); maintenance, installation and problem handling are very convenient.

[0046] Referring to Figures 2-13 The valve body 300 is further provided with a mounting hole 301 and mounting grooves 302 on both sides of the mounting hole 301, and the mounting assembly 400 is mounted in the mounting grooves 302. The mounting assembly 400 is used for assembling with the connecting rod 510 and the large end 520 to assemble two adjacent superimposed valves by using the connecting rod 510. The diameter of the large end 520 is larger than that of the connecting rod 510, so that a clear step is formed. The mounting assembly 400 is clamped with the step, so that the two adjacent superimposed valves are connected by using the connecting rod 510.

[0047] The installation assembly 400 comprises an installation frame 410, a push block 420, a fixed block 430, and a cam rod 440, the installation frame 410 and the fixed block 430 are installed in the installation slot 302, the installation frame 410 is provided with a frame slot 411 penetrating therethrough and is further provided with a spring protrusion 412, the spring protrusion 412 is assembled with one end of a tension spring 401, the other end of the tension spring 401 is assembled with a push block protrusion 422, the push block protrusion 422 is assembled with the push block 420 after penetrating through the frame slot 411. In the direction of the end surface of the push block 420, the tension spring 401 is in an inclined state, and this design mainly applies a spring force to the push block 420 along the length direction and the width direction of the frame slot 411.

[0048] The push block 420 is further provided with a push block inclined surface 421 and a push block through slot 423, the push block through slot 423 is used for penetrating the large end 520, and the push block inclined surface 421 is in abutment with the fixed inclined surface 431; the installation frame 410 is further assembled with the cam rod 440 in a circumferential rotation manner, one end of the cam rod 440 is provided with a hexagonal prism 441 after penetrating out of the installation frame 410, and the cam rod 440 is further provided with a protruding portion 443 and a horizontal portion 442 at positions corresponding to the push block 420, respectively, the distance between the horizontal portion 442 and the axis of the cam rod 440 is less than the distance between the protruding portion 443 and the axis of the cam rod 440; and the push block 420 is clamped and slidably installed in the installation frame 410. The protruding portion 443 and the horizontal portion 442 are alternatively in abutment with the end surface of the push block 420, and the cam rod 440 can drive the protruding portion 443 and the horizontal portion 442 to switch relative to the push block 420 when rotating, so as to push the push block 420 to move by switching the protruding portion 443 and the horizontal portion 442. When the push block 420 is at the end farthest from the spring protrusion 412, the side surface of the push block 420 is in abutment with the end surface of the step, so as to tighten the connecting rod and realize the assembly and fixation of the two superimposed valves.

[0049] Referring to Figure 6 , in the initial state, the push block 420 is in abutment with the horizontal portion 442, and the push block is at the end closest to the cam rod 440, at this time, the large end 520 can penetrate through the push block through slot 423. After the large end 520 is inserted into the installation hole and penetrates through the push block through slot 423, the cam rod 440 is rotated to make the protruding portion 443 in abutment with the push block 420, in this process, the push block 420 is pushed to move away from the cam rod 440, so that the push block 420 is guided to move towards the large end under the cooperation of the push block inclined surface 421 and the fixed inclined surface 431 until the end surface of the push block is in abutment on the end surface of the step to tighten the connecting rod. When disassembly is needed, the cam rod 440 is reversed to reset, and the push block 420 is pulled back by the tension spring to reset.

[0050] Referring to Figure 8Further comprising a positioning assembly 600 installed in the positioning hole 303 of the valve body 300, the positioning assembly 600 comprises a positioning shell 610, a positioning block 620, a positioning rod 630, a spring 640, and an inner tube 650, the positioning shell 610 is installed on the valve body 300, the positioning shell 610 is provided with a positioning sliding hole 611, the positioning sliding hole 611 is clamped and slidably assembled with the positioning block flange 622 provided on the positioning block 620, the positioning block 620 is provided with a positioning protrusion 621, the positioning protrusion 621 penetrates out of the positioning shell 610 and enters the installation hole 301 to provide damping for the penetration of the large end, so as to realize the axial positioning of the large end, of course, when the axial thrust of the large end is large enough, the positioning block 620 can be extruded to move downward until it penetrates through the positioning block 620.

[0051] The positioning block 620 is assembled with one end of the positioning rod 630, one end of the positioning rod 630 is installed in the inner tube hole 651, and the end is provided with a sliding ring 631 which is in close contact with the inner tube hole 651 and is slidably assembled. After the positioning block 620 exits the installation hole, the positioning rod 630 will penetrate out of the inner tube hole 651 to facilitate observation during operation. The inner tube 650 is installed on the positioning shell 610, the spring 640 is installed between the positioning block flange 622 and the end of the positioning shell 610, and the spring 640 applies a spring force to the positioning block 620 to resist its movement away from the installation hole.

[0052] In use, only the positioning rod 630 penetrating out of the inner tube hole 651 needs to be observed to determine whether the locking is in place, which is very convenient and fast to use.

[0053] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the skilled person in the field to which the present application belongs.

[0054] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0055] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0056] In the present application, the circumferentially rotatable assembly is a relative rotating assembly, such as an assembly through a bearing; the circumferentially rotatable and axially immovable assembly is a relative rotating and axially immovable assembly, such as an assembly in which a shaft is installed with shaft clamps on both sides of the mounting device so that the shaft cannot move axially; the circumferentially rotatable and axially movable assembly is a movable assembly, such as an assembly in which a shaft passes through a shaft hole; and the circumferentially immovable and axially movable assembly can be a spline groove and spline assembly.

[0057] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "linking", "fixing", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise clearly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0059] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A superimposed counterbalance valve characterized by: The first balance valve, the second balance valve, A port and A0 port, B port and B0 port, the second oil channel, the third oil channel, the fourth oil channel, the fifth oil channel, the sixth oil channel, the first channel, the second channel, the first connecting channel, the second connecting channel, the first pilot channel, the second pilot channel are included. The first balance valve includes a first sequence valve and a first check valve, and the second balance valve includes a second sequence valve and a second check valve. The third oil channel is communicated with the oil outlet of the first sequence valve, the oil inlet of the first sequence valve is communicated with the fourth oil channel, the fourth oil channel is communicated with the A0 port, and the third oil channel is communicated with the A port. The fifth oil channel is communicated with the B port, the fifth oil channel is communicated with the oil outlet of the second sequence valve, the oil inlet of the second sequence valve is communicated with the sixth oil channel, and the sixth oil channel is communicated with the B0 port. The fifth oil channel is communicated with the first connecting channel, the oil inlet of the second check valve is communicated with the first connecting channel, the oil outlet of the second check valve is communicated with the second connecting channel, and the second connecting channel is communicated with the pressure oil port of the second sequence valve and the sixth oil channel.

2. The superimposed counterbalance valve of claim 1, wherein: The first channel is further communicated with the pilot oil port of the second pilot part of the second sequence valve through the first pilot channel.

3. The superimposed counterbalance valve of claim 1, wherein: The seventh oil channel is further communicated with the T port and the T0 port.

4. The superimposed counterbalance valve of claim 1, wherein: The seventh oil channel is further communicated with the Y port and the Y0 port.

5. The superimposed counterbalance valve of claim 1, wherein: The second oil channel is further communicated with the P port and the P0 port.

6. The superimposed balancing valve according to any one of claims 1 to 5, characterized in that: The first oil channel is further communicated with the X port and the X0 port. The valve body is further provided with a mounting hole and mounting grooves on both sides of the mounting hole, and a mounting assembly is mounted in the mounting grooves. The mounting assembly includes a mounting frame, a push block, a fixed block and a cam rod. The push block is further provided with a push block inclined surface and a push block through groove.

7. The superimposed counterbalance valve of claim 6, wherein: The push block is clamped and slidably mounted in the mounting frame. The push block is clamped and slidably mounted in the mounting frame. The push block is clamped and slidably mounted in the mounting frame. The push block is clamped and slidably mounted in the mounting frame.

8. The superimposed counterbalance valve of claim 6, wherein: One end of the cam rod is provided with a hexagonal prism after penetrating through the mounting frame.

9. The superimposed counterbalance valve of claim 6, wherein: The positioning assembly is installed in the positioning hole of the valve body, and comprises a positioning shell, a positioning block, a positioning rod, a spring and an inner tube. The positioning shell is installed on the valve body, and a positioning sliding hole is arranged in the positioning shell. The positioning block flange is arranged on the positioning block, and a positioning protrusion is arranged on the positioning block. The positioning protrusion penetrates through the positioning shell and enters the mounting hole, thereby providing damping for the penetration of the large end. The positioning block is assembled with one end of the positioning rod. One end of the positioning rod is installed in the inner tube hole, and a sliding ring is arranged on the end. The sliding ring is in close contact with the inner tube hole and is assembled in a sliding manner. The inner tube is installed on the positioning shell. The positioning block flange and the end of the positioning shell are provided with a spring.

10. The superimposed counterbalance valve of claim 9, wherein: After the positioning block exits the mounting hole, the positioning rod penetrates through the inner tube hole.

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