CN219911341U - Protective differential combination valve - Google Patents
Protective differential combination valve Download PDFInfo
- Publication number
- CN219911341U CN219911341U CN202320997817.5U CN202320997817U CN219911341U CN 219911341 U CN219911341 U CN 219911341U CN 202320997817 U CN202320997817 U CN 202320997817U CN 219911341 U CN219911341 U CN 219911341U
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- Prior art keywords
- valve
- liquid
- differential
- valve core
- flow channel
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- 230000001681 protective effect Effects 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 claims abstract description 123
- 230000006835 compression Effects 0.000 claims abstract description 6
- 238000007906 compression Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 abstract description 5
- 238000012806 monitoring device Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract 6
- 238000009434 installation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model provides a protection type differential combination valve, including the valve body, two accuse one-way alternating valves and check valve, the valve body is equipped with the valve pocket, first inlet, the second inlet, first liquid outlet, the second outlet, the backward flow mouth, differential circuit, two accuse one-way alternating valves include the spring, first case and second case, be equipped with first fluid channel and second fluid channel in first case and the second case respectively, can seal first fluid channel and intercommunication first inlet in proper order through removing first case and compression spring, first outlet and backward flow mouth, can seal second fluid channel and intercommunication second inlet in proper order through removing the second case and compression spring, second outlet and differential circuit, the check valve is located differential circuit and is prevented backward flow to second fluid channel, can carry out fluid control and still have overflow release's function, it has hydraulic control and explosion jar guard action to the pneumatic cylinder that connects in addition to install monitoring device.
Description
Technical Field
The utility model relates to the technical field of hydraulic control valves, in particular to a protective differential combination valve.
Background
At present, a differential loop and an alternate valve are basically arranged in a hydraulic control system, the differential loop is a liquid flow channel for leading a liquid flow with a rod cavity of a hydraulic cylinder to a rodless cavity so as to accelerate the pushing and sliding action of a piston rod, and the alternate valve can limit the liquid flow direction. In the existing hydraulic control system, the liquid paths are more, the differential circuit or other liquid paths are independently used, the function is single, the switching operation is often needed through reversing operation, the alternating valve function is single, the safety overflow function is not provided, and the detection device is additionally arranged to monitor the hydraulic state.
Disclosure of Invention
In order to solve the problems, the utility model provides a protective differential combination valve;
the utility model provides a protection type differential combination valve, includes valve body, double control one-way alternating valve and check valve, be equipped with the valve pocket in the valve body, the valve body is equipped with first inlet, second inlet, first liquid outlet, second liquid outlet and the backward flow mouth of intercommunication valve pocket, the valve body is equipped with the differential circuit of connecting first inlet, first inlet and second liquid inlet are located the both ends of valve pocket respectively, double control one-way alternating valve installs at the valve pocket and includes spring, first case and second case, the spring is against the cooperation and is in between first case and the second case, first case and second case pass through the spring and block respectively the intercommunication of first inlet and first liquid outlet and the intercommunication of second inlet and second liquid outlet, be equipped with first liquid flow channel and second liquid flow channel in first case and the second case respectively, first liquid flow channel communicates first liquid outlet and backward flow mouth, second liquid flow channel passes through the first liquid flow channel and differential circuit communicates with the second liquid flow channel, first liquid flow channel and second liquid flow channel can be compressed the differential circuit and the second liquid flow channel can be blocked to the differential circuit through first case, second case and second liquid flow channel and the seal the intercommunication to the first liquid flow channel, second case and the differential circuit.
Preferably, the check valve is arranged on a differential valve port arranged on the differential loop and comprises a valve seat, a limiting block and a steel ball, the steel ball is driven by liquid flow to block the differential valve port to realize check, and the opening resistance is small.
Preferably, two ends of the spring respectively lean against an opening end arranged on the first valve core and a capping end arranged on the second valve core, so that the pressure of a liquid cavity between the first valve core and the second valve core and the pressure of the second liquid flow channel are balanced.
Preferably, the double-control unidirectional alternating valve further comprises a valve pipe arranged in the valve cavity, the first valve core and the second valve core are in sliding fit in the valve pipe, stability of actions of the first valve core and the second valve core is improved, and integral installation of the double-control unidirectional alternating valve is facilitated.
Preferably, the sealing sleeve is arranged outside the valve pipe, and the end part of the valve pipe is provided with an end cover and a pressing ring, so that the sealing performance and the stability of the valve pipe are improved.
The utility model has the following beneficial effects: the liquid flow of the differential loop is unidirectional, and the differential loop can be used as a backflow liquid flow path and an overflow liquid flow path, and the double-control unidirectional alternating valve not only can control the liquid flow, but also has the function of automatic overflow pressure relief, and has the functions of hydraulic control and cylinder explosion protection on the connected hydraulic cylinder without additionally installing a monitoring device.
Drawings
Fig. 1 is a schematic diagram of the internal structure of an embodiment.
1. A valve body; 2. a check valve; 3. a valve cavity; 4. a first liquid inlet; 5. a second liquid inlet; 6. a first liquid outlet; 7. a second liquid outlet; 8. a return port; 9. a differential circuit; 10. a spring; 11. a first valve core; 12. a second valve core; 13. a first flow channel; 14. a second flow channel; 15. a differential valve port; 16. a valve seat; 17. a limiting block; 18. a steel ball; 19. an open end; 20. sealing the top end; 21. a valve tube; 22. sealing sleeve; 23. an end cap; 24. and (5) pressing the ring.
Description of the embodiments
The utility model is further described with reference to fig. 1 and the examples.
The protection type differential combination valve comprises a valve body 1, a double-control unidirectional alternating valve and a check valve 2, wherein a valve cavity 3 is arranged in the valve body 1, the valve body 1 is provided with a first liquid inlet 4, a second liquid inlet 5, a first liquid outlet 6, a second liquid outlet 7 and a return orifice 8 which are communicated with the valve cavity 3, the valve body 1 is provided with a differential loop 9 connected with the first liquid inlet 4, the first liquid inlet 4 and the second liquid inlet 5 are respectively positioned at two ends of the valve cavity 3, the double-control unidirectional alternating valve is arranged in the valve cavity 3 and comprises a spring 10, a first valve core 11 and a second valve core 12, the spring 10 is propped against and matched between the first valve core 11 and the second valve core 12, the first valve core 11 and the second valve core 12 respectively block the communication between the first liquid inlet 4 and the first liquid outlet 6 and the communication between the second liquid inlet 5 and the second liquid outlet 7 through the spring 10, a first liquid flow channel 13 and a second liquid flow channel 14 are respectively arranged on the first valve core 11 and the second valve core 12, the first liquid flow channel 13 communicates the first liquid outlet 6 with the return opening 8, the second liquid flow channel 14 communicates the second liquid outlet 7 with the differential circuit 9, the first liquid flow channel 13 and the first liquid inlet 4, the first liquid outlet 6 and the return opening 8 can be sequentially closed by moving the first valve core 11 and the compression spring 10, the second liquid flow channel 14 and the second liquid inlet 5, the second liquid outlet 7 and the differential circuit 9 can be sequentially closed by moving the second valve core 12 and the compression spring 10, the check valve 2 is located in the differential circuit 9 and prevents back flow to the second flow path 14.
The double-control unidirectional alternating valve further comprises a valve tube 21 arranged in the valve cavity 3, the first valve core 11 and the second valve core 12 are in sliding fit in the valve tube 21, the stability of the actions of the first valve core 11 and the second valve core 12 is improved, the integral installation of the double-control unidirectional alternating valve is convenient, a sealing sleeve 22 is arranged outside the valve tube 21, an end cover 23 and a pressing ring 24 are arranged at the end part of the valve tube 21, and the sealing performance and the stability of the installation of the valve tube 21 are improved. Both ends of the spring 10 are respectively abutted against an opening end 19 provided on the first valve element 11 and a capping end 20 provided on the second valve element 12, so that the pressure of the liquid chamber between the first valve element 11 and the second valve element 12 and the pressure of the second liquid flow channel 14 are balanced.
The check valve 2 is arranged on a differential valve port 15 arranged on the differential loop 9 and comprises a valve seat 16, a limiting block 17 and a steel ball 18, a movable space of the steel ball 18 is formed between the limiting block 17 and the valve port, the steel ball 18 is driven by liquid flow to block the differential valve port 15 to realize check, the opening resistance is small, and the limiting block 17 is enabled to form propping limit on the steel ball 18 under the impact action of liquid flow after opening.
The first liquid outlet 6 is connected with the rodless cavity of the external hydraulic cylinder, the second liquid outlet 7 is connected with the rod cavity of the external hydraulic cylinder, the first liquid inlet 4, the second liquid inlet 5 and the backflow outlet 6 can be controlled through devices such as an external liquid pump, an electromagnetic valve and the like, so that the hydraulic control, the installation and the electric control start-stop method of the connected hydraulic cylinder are not described more herein.
Working principle: after the first liquid inlet 4 inputs liquid flow, the first valve core 11 moves and compresses the spring 10, the first liquid inlet 4 is communicated with the first liquid outlet 6 and blocks the first liquid flow channel 13, the liquid flow can not pass through the one-way valve, but is output from the first liquid outlet 6 to the rodless cavity of the hydraulic cylinder, meanwhile, the liquid flow in the rod-shaped cavity of the hydraulic cylinder flows back to the second liquid outlet 7, the second liquid flow channel 14 of the second valve core 12, the one-way valve and the first liquid outlet 6 to the rodless cavity of the hydraulic cylinder in sequence, the sliding speed of a piston rod of the hydraulic cylinder is accelerated through the differential loop 9, the first valve core 11 continuously moves and compresses the spring 10 until the first liquid inlet 4, the first liquid outlet 6 and the backflow port 8 are communicated with each other under the condition that the liquid flow is not stopped at the first liquid inlet 4, the excessive internal pressure is relieved through the return port 8 to ensure safety, the explosion of a cylinder is prevented from occurring in a rodless cavity, liquid flow is input into the second liquid inlet 5, the second valve core 12 moves and compresses the spring 10, the second liquid inlet 5 is communicated with the second liquid outlet 7 and blocks the second liquid flow channel 14, liquid flow is input into the rod cavity of the hydraulic cylinder from the second liquid outlet 7, the rodless cavity liquid flow flows back to the return port 8 through the first liquid outlet 6 and the first liquid flow channel 13 of the first valve core 11, the retraction of a piston rod of the hydraulic cylinder is realized, the increase of the internal pressure continuously moves the second valve core 12 and compresses the spring 10 under the condition that the liquid flow is not stopped to be input into the second liquid inlet 5 until the second liquid inlet 5, the second liquid outlet 7 and the differential circuit 9 are communicated with each other, the excessive internal pressure is relieved by passing through the differential loop 9 and the first liquid flow channel 13 to the reflux port 8 in sequence, so that the explosion of the cylinder in the rod cavity is prevented.
The liquid flow of the differential loop 9 is unidirectional, and can be used as a backflow liquid path and an overflow liquid path, and the double-control unidirectional alternating valve not only can control the liquid flow, but also has the function of automatic overflow pressure relief, and has the functions of hydraulic control and cylinder explosion protection for the connected hydraulic cylinders without installing a monitoring device.
It is apparent that the above examples of the present utility model are merely illustrative of the present utility model and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary or impossible to exemplify all embodiments herein. And obvious changes and modifications which come within the spirit of the utility model are desired to be protected.
Claims (5)
1. A protection type differential combination valve is characterized in that: comprises a valve body (1), a double-control one-way alternating valve and a check valve (2), wherein a valve cavity (3) is arranged in the valve body (1), the valve body (1) is provided with a first liquid inlet (4), a second liquid inlet (5), a first liquid outlet (6), a second liquid outlet (7) and a backflow port (8) which are communicated with the valve cavity (3), the valve body (1) is provided with a differential loop (9) connected with the first liquid inlet (4), the first liquid inlet (4) and the second liquid inlet (5) are respectively positioned at two ends of the valve cavity (3), the double-control one-way alternating valve is arranged in the valve cavity (3) and comprises a spring (10), a first valve core (11) and a second valve core (12), the spring (10) is propped against and matched between the first valve core (11) and the second valve core (12), the first valve core (11) and the second valve core (12) are respectively blocked through the spring (10), the first liquid inlet (4) is communicated with the first liquid outlet (6), the second liquid inlet (5) is communicated with a second liquid inlet (7) and a second liquid flow channel (13) is respectively arranged in the second valve core (12), the first liquid flow channel (13) is communicated with the first liquid outlet (6) and the backflow port (8), the second liquid flow channel (14) is communicated with the second liquid outlet (7) and the differential circuit (9), the first liquid flow channel (13) and the first liquid inlet (4), the first liquid outlet (6) and the backflow port (8) can be sequentially closed by moving the first valve core (11) and the compression spring (10), the second liquid flow channel (14) and the second liquid inlet (5) can be sequentially closed by moving the second valve core (12) and the compression spring (10), the second liquid outlet (7) and the differential circuit (9) are communicated, and the check valve (2) is located in the differential circuit (9) and prevents backflow to the second liquid flow channel (14).
2. The protective differential combination valve of claim 1, wherein: the check valve (2) is arranged on a differential valve port (15) arranged on the differential circuit (9) and comprises a valve seat (16), a limiting block (17) and a steel ball (18).
3. The protective differential combination valve of claim 1, wherein: both ends of the spring (10) respectively lean against an opening end (19) arranged on the first valve core (11) and a capping end (20) arranged on the second valve core (12).
4. The protective differential combination valve of claim 1, wherein: the double-control unidirectional alternating valve further comprises a valve pipe (21) arranged in the valve cavity (3), and the first valve core (11) and the second valve core (12) are in sliding fit in the valve pipe (21).
5. The protective differential combining valve of claim 4, wherein: the valve tube (21) is externally provided with a sealing sleeve (22), and the end part of the valve tube (21) is provided with an end cover (23) and a pressing ring (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320997817.5U CN219911341U (en) | 2023-04-27 | 2023-04-27 | Protective differential combination valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320997817.5U CN219911341U (en) | 2023-04-27 | 2023-04-27 | Protective differential combination valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219911341U true CN219911341U (en) | 2023-10-27 |
Family
ID=88428211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320997817.5U Active CN219911341U (en) | 2023-04-27 | 2023-04-27 | Protective differential combination valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219911341U (en) |
-
2023
- 2023-04-27 CN CN202320997817.5U patent/CN219911341U/en active Active
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