CN211550123U - Pilot-operated overflow valve with filtering device - Google Patents
Pilot-operated overflow valve with filtering device Download PDFInfo
- Publication number
- CN211550123U CN211550123U CN201921597862.1U CN201921597862U CN211550123U CN 211550123 U CN211550123 U CN 211550123U CN 201921597862 U CN201921597862 U CN 201921597862U CN 211550123 U CN211550123 U CN 211550123U
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- 238000001914 filtration Methods 0.000 title claims abstract description 8
- 238000013016 damping Methods 0.000 claims abstract description 34
- 230000033001 locomotion Effects 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 103
- 239000010720 hydraulic oil Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a pilot operated overflow valve with filter equipment belongs to pilot operated overflow valve technical field. The pilot overflow valve with the filtering device comprises a main valve body, a pilot valve body, a main oil path oil inlet, a main oil path oil outlet, a motion cavity, a main valve core spring, a main valve core damping hole, an external control oil cavity, a conveying cavity, a filter screen, an external control plug, a second damping hole, a pilot valve core spring and a filter screen blocking assembly. The utility model discloses in when the fluid system produced impurity such as iron fillings, dust, the filter screen filters it, has protected the normal work of second damping hole, prevents its jam.
Description
Technical Field
The utility model belongs to the technical field of the pilot-operated overflow valve, a pilot-operated overflow valve with filter equipment is related to.
Background
The hydraulic technology becomes one of key technologies in the industrial fields of all countries in the world, according to incomplete statistics, more than 95% of mechanical equipment adopts the hydraulic technology and devices, and the hydraulic machine is a system integrating electro-hydraulic control into a whole, so that the control is complex and the fault diagnosis is difficult. The fault shutdown not only reduces the production efficiency of enterprises and causes huge economic loss, but also brings great difficulty to the production enterprises because the maintenance technology of the hydraulic equipment is locked abroad, thereby having great practical significance for the reliable operation, fault diagnosis and health prediction of the hydraulic equipment.
The pilot overflow valve is one of the most widely used pressure control valves in a hydraulic system, can work under very high pressure, has better pressure stabilizing performance than a direct-acting overflow valve, and can meet the requirement of occasions with larger flow. However, the pilot-operated relief valve must be provided with 2 damping holes, the hole diameter is very small, the damping holes are easy to be blocked in the use process, and the fault is difficult to judge, which brings great difficulty to maintenance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the above-mentioned problem that prior art exists, provide a guide's formula overflow valve with filter equipment, the utility model aims to solve the technical problem that: how to provide a pilot operated relief valve with a filter device.
The purpose of the utility model can be realized by the following technical proposal:
a pilot overflow valve with a filter device comprises a main valve body, a pilot valve body arranged on the main valve body, a main oil path oil inlet arranged at the first end of the main valve body, a main oil path oil outlet arranged at the second end of the main valve body, a motion cavity with one end communicated with the main oil path oil inlet and the other end communicated with the main oil path oil outlet, a main valve core arranged in the motion cavity, a main valve core damping hole arranged on the main valve core and used for pushing the main valve core to move to one end of the motion cavity when the oil pressure at the main oil path oil inlet is less than a preset pressure so as to enable the main valve core to seal the communication position of the motion cavity and the main oil path oil outlet, an external control oil cavity formed by the main valve body and the pilot valve body, a conveying cavity arranged in the main valve body and used for conveying the hydraulic oil in the motion cavity into the external control oil cavity, a pilot valve, The pilot valve comprises a filter screen, an outer control plug, a second damping hole, a pilot valve core spring and a filter screen blocking assembly, wherein the filter screen is arranged in a pilot valve body and used for filtering hydraulic oil flowing out of one end of an outer control oil cavity, the outer control plug is used for sealing an outer control opening at one end of the outer control oil cavity, the second damping hole is arranged at the other end of the outer control oil cavity, the pilot valve core is used for blocking the second damping hole, the pilot valve core spring is used for pushing the pilot valve core to move towards the direction.
Preferably, the filter screen is installed in the pilot valve body through a locking nut.
Preferably, the adjusting mechanism further comprises an adjusting cavity arranged in the pilot valve body and used for the pilot valve spring to move, and an adjusting structure with one end extending into the adjusting cavity and used for adjusting the length of the pilot valve core spring.
Preferably, the adjusting structure comprises a threaded hole arranged at one end of the pilot valve body, a pushing block connected to the pilot valve spring, and an adjusting screw with one end screwed to the threaded hole and penetrating through the threaded hole to be connected to the pushing block.
Preferably, the filter screen blocks up the subassembly including set up the fixed shim on the filter screen, set up in the fixed shim middle part, be used for supplying oil opening, the warning sign that passes through via the filterable hydraulic oil of filter screen, set up first spring, the one end on the fixed shim and connect in the drive link of warning sign and the mount that is used for supporting drive link in first spring, the other end, be equipped with the observation hole that is used for observing the warning sign on the pilot valve body, the warning sign is including setting up in the green tablet of observation hole bottom and being used for when the filter screen blocks up first spring atress extrusion pulling drive link to drive its red tablet of moving to observation hole bottom.
Preferably, the first spring is a belleville spring.
Preferably, the adjusting cavity is communicated with the main oil path oil outlet.
Preferably, the bottom end of the main valve core is an isosceles trapezoid block, the sectional area of the bottom end of the isosceles trapezoid block is smaller than the sectional area of the top end of the oil inlet of the main oil path, and the sectional area of the top end of the isosceles trapezoid block is larger than the sectional area of the top end of the oil inlet of the main oil path.
Preferably, the main valve element damping hole is formed in the middle of the main valve element, and the center line of the main valve element damping hole is overlapped with the center line of the main valve element.
Preferably, the adjusting structure further comprises an adjusting hand wheel arranged at one end of the adjusting screw.
The utility model discloses in when system's pressure is less than when predetermineeing pressure, when main oil circuit oil inlet produced the oil pressure, fluid passes through the motion chamber that main valve core damping hole got into main valve core to in the loading of outer accuse oil pocket is to the pilot valve body, because of the pilot valve does not open, main valve core upper and lower pressure equals, under the effect of main valve core spring, promotes main valve core motion to the intercommunication department of motion chamber one end so that main valve core seal motion chamber and main oil circuit oil-out, does not overflow. When the system pressure is higher than the preset pressure, when the oil pressure is generated at the oil inlet of the main oil path, the oil enters the motion cavity of the main valve core through the damping hole of the main valve core and is loaded into the pilot valve body through the external control oil cavity, when the pressure is higher than that of the pilot valve core, the hydraulic oil is loaded onto the pilot valve core through the filter screen, the filter screen blockage detection component and the second damping hole, the pilot valve core is opened, so that the pressure of the motion cavity on the main valve core is reduced, the main valve core is lifted under the action of the hydraulic oil pressure by overcoming the action of the spring, the hydraulic oil pushes the main valve core to move to the other end of the motion cavity so as to separate the main valve core from the communication position of the motion cavity and the oil outlet of the. When the oil system produces impurities such as iron chips, dust and the like, the filter screen filters the impurities, the normal work of the second damping hole is protected, and the blockage of the second damping hole is prevented.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural view of the filter screen plugging assembly of the present invention.
In the figure: 1-main valve body, 11-main oil circuit oil inlet, 12-main oil circuit oil outlet, 13-main valve core, 131-main valve core damping hole, 14-motion cavity, 15-main valve core spring, 16-conveying cavity, 2-pilot valve body, 21-second damping hole, 3-external control oil cavity, 31-external control plug, 4-filter screen, 41-locking nut, 5-filter screen blocking component, 51-fixed gasket, 52-oil through hole, 53-first spring, 54-transmission connecting rod, 55-fixed frame, 56-red plate, 57-green plate, 6-pilot valve core, 7-observation hole, 8-pilot valve core spring, 9-adjusting structure, 91-pushing block, 92-adjusting screw and 93-adjusting hand wheel.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Referring to fig. 1 and 2, the pilot-operated overflow valve with a filtering device in this embodiment includes a main valve body 1, a pilot valve body 2 disposed on the main valve body 1, a main oil inlet 11 disposed at a first end of the main valve body 1, a main oil outlet 12 disposed at a second end of the main valve body 1, a moving cavity 14 having one end connected to the main oil inlet and the other end connected to the main oil outlet, a main spool 13 disposed in the moving cavity 14, a main spool spring 15 for pushing the main spool 13 to move to one end of the moving cavity 14 when the oil pressure at the main oil inlet 11 is less than a predetermined pressure, so that the main spool 13 seals the connection between the moving cavity 14 and the main oil outlet, a main spool damping hole 131 disposed on the main spool 13 for allowing the hydraulic oil entering from the main oil inlet 11 to flow through, an external control 3 formed by the main valve body 1 and the pilot valve body 2, and an external control 3, The hydraulic control valve comprises a conveying cavity 16, a filter screen 4, an outer control plug 31, a second damping hole 21, a pilot valve core 6, a pilot valve core spring and a filter screen blocking assembly 5, wherein the conveying cavity 16 is arranged in a main valve body 1 and used for conveying hydraulic oil in a movement cavity 14 into an outer control oil cavity 3, the filter screen 4 is arranged in a pilot valve body 2 and used for filtering the hydraulic oil flowing out of one end of the outer control oil cavity 3, the outer control plug 31 is used for sealing the outer control opening at one end of the outer control oil cavity 3, the second damping hole 21 is arranged at the other end of the outer control oil cavity 3, the pilot valve core 6 is used for blocking the second damping hole 21, the pilot valve core spring.
Here, when the system pressure is lower than the preset pressure, when the main oil inlet 11 generates oil pressure, oil enters the moving chamber 14 of the main valve element 13 through the main valve element damping hole 131 and is loaded into the pilot valve body through the external control oil chamber 3, because the pilot valve is not opened, the upper and lower pressures of the main valve element 13 are equal, and under the action of the main valve element spring 15, the main valve element 13 is pushed to move to one end of the moving chamber 14, so that the main valve element 13 seals the communication position of the moving chamber 14 and the main oil outlet, and does not overflow. When the system pressure is greater than the preset pressure, when the main oil path oil inlet 11 generates oil pressure, oil enters the movement cavity 14 of the main valve core 13 through the main valve core damping hole 131 and is loaded into the pilot valve body through the external control oil cavity 3, when the pressure is higher than that of the pilot valve core 6, the hydraulic oil is loaded onto the pilot valve core 6 through the filter screen 4, the filter screen 4 blocking detection assembly and the second damping hole 21, the pilot valve core 6 is opened, so that the pressure of the movement cavity 14 on the main valve core 13 is reduced, under the action of the hydraulic oil pressure, the main valve core 13 is lifted by overcoming the action of the spring, the hydraulic oil pushes the main valve core 13 to move to the other end of the movement cavity 14, so that the main valve core 13 and the movement cavity 14 are separated from the communication position of the main oil path oil outlet, and the main oil path. When the oil system produces impurities such as iron filings and dust, the filter screen 4 filters the impurities, thereby protecting the normal work of the second damping hole 21 and preventing the blockage.
The filter screen 4 can be installed in the pilot valve body 2 through the locking nut 41, and the installation is simple and convenient. The filter screen 4 is additionally arranged at the second damping empty part of the pilot overflow valve, so that the fault that the second damping hole 21 is blocked by fine impurities is avoided, the probability of fault occurrence is reduced, and the cost is saved. The blockage fault of the second damping hole 21 of the pilot-operated overflow valve is easy to occur, and the method for adding the filter screen 4 is simple and easy to implement, low in cost and remarkable in effect.
The pilot overflow valve with the filtering device in this embodiment may further include an adjusting cavity disposed in the pilot valve body 2 for the pilot valve spring to move, and an adjusting structure 9 having one end extending into the adjusting cavity for adjusting the length of the pilot valve core spring.
The adjusting structure 9 may include a threaded hole disposed at one end of the pilot valve body 2, a pushing block 91 connected to the pilot valve spring, and an adjusting screw 92 having one end screwed to the threaded hole and penetrating through the threaded hole to be connected to the pushing block 91, so as to adjust the elastic force of the pilot valve spring by changing the positions of the adjusting screw 92 and the threaded hole.
The filter screen blocks up subassembly 5 can be including setting up the fixed shim 51 on filter screen 4, set up in fixed shim 51 middle part, an oil through hole 52 for supplying to pass through via the filterable hydraulic oil of filter screen 4, the warning sign, set up first spring 53 on fixed shim 51, one end is connected in first spring 53, the other end is connected in the transmission connecting rod 54 of warning sign and is used for supporting the mount 55 of transmission connecting rod 54, the mount 55 bottom can weld in pilot valve body 2, be equipped with the observation hole 7 that is used for observing the warning sign on pilot valve body 2, the warning sign is including setting up in the green tablet 57 of observation hole 7 bottom and being used for first spring 53 atress extrusion pulling transmission connecting rod 54 drives its red tablet 56 that moves to observation hole 7 bottom when filter screen 4 blocks up. If the filter screen 4 filters the impurity too much, it produces a large pressure differential, and this pressure triggers the filter screen to block the subassembly 5, and this subassembly passes on information to the observation hole 7, and the staff sees the back and just can change filter screen 4. When the filter element is not blocked, the pressure born by the fixed gasket 51 is small, the belleville spring is not deformed, and the alarm indicator displays the green indicator 57 to indicate normal operation. When the filter core blockked up the back, the pressure increase that fixed shim 51 bore, and then make belleville spring warp, touch transmission link 54 pulling warning sign for the warning sign becomes red tablet 56, reminds the staff to change the filter core.
The first spring 53 is a belleville spring. Adopt belleville spring to carry out pressure detection, convenient brief introduction, it is with low costs. One end of the belleville spring may be welded to the fixing pad 51. The driving link 54 may be welded at both ends to the first spring 53 and the alarm signboard, respectively.
The adjusting cavity is communicated with a main oil way oil outlet 12.
The bottom end of the main valve core 13 is an isosceles trapezoid block, the sectional area of the bottom end of the isosceles trapezoid block is smaller than that of the top end of the main oil way oil inlet 11, and the sectional area of the top end of the isosceles trapezoid block is larger than that of the top end of the main oil way oil inlet 11.
A main spool orifice 131 is provided in the middle of main spool 13, and the center line of main spool orifice 131 coincides with the center line of main spool 13.
The adjustment mechanism 9 may further include an adjustment handwheel 93 disposed at one end of the adjustment screw 92 to facilitate a user to change the position of the adjustment screw 92 in the threaded hole.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The utility model provides a pilot operated overflow valve with filter equipment which characterized in that: the hydraulic control valve comprises a main valve body (1), a pilot valve body (2) arranged on the main valve body (1), a main oil way oil inlet (11) arranged at the first end of the main valve body (1), a main oil way oil outlet (12) arranged at the second end of the main valve body (1), a movement cavity (14) with one end communicated with the main oil way oil inlet and the other end communicated with the main oil way oil outlet, a main valve core (13) arranged in the movement cavity (14), a main valve core spring (15) used for pushing the main valve core (13) to move to one end of the movement cavity (14) when the oil pressure at the main oil way oil inlet (11) is smaller than preset pressure so that the main valve core (13) seals the communication position of the movement cavity (14) and the main oil way oil outlet, a main valve core damping hole (131) arranged on the main valve core (13) and used for allowing hydraulic oil entering from the main oil way oil inlet (11) to pass through and flow in, and an external control, The hydraulic control valve comprises a conveying cavity (16) arranged in a main valve body (1) and used for conveying hydraulic oil in a movement cavity (14) into an external control oil cavity (3), a filter screen (4) arranged in a pilot valve body (2) and used for filtering the hydraulic oil flowing out of one end of the external control oil cavity (3), an external control plug (31) used for sealing an external control opening at one end of the external control oil cavity (3), a second damping hole (21) arranged at the other end of the external control oil cavity (3), a pilot valve core (6) used for blocking the second damping hole (21), a pilot valve core spring used for pushing the pilot valve core (6) to move towards the direction close to the external control oil cavity (3) and a filter screen blocking assembly (5) arranged at one end of the filter screen (4).
2. The pilot operated relief valve with filter assembly according to claim 1 wherein: the filter screen (4) is installed in the pilot valve body (2) through a locking nut (41).
3. The pilot operated relief valve with a filter device according to claim 1 or 2, characterized in that: the pilot valve further comprises an adjusting cavity and an adjusting structure, wherein the adjusting cavity is arranged in the pilot valve body (2) and used for allowing a pilot valve spring to move, and one end of the adjusting structure extends into the adjusting cavity and is used for adjusting the length of the pilot valve core spring (9).
4. The pilot operated relief valve with filter device according to claim 3, wherein: the adjusting structure (9) comprises a threaded hole arranged at one end of the pilot valve body (2), a pushing block (91) connected to a pilot valve spring, and an adjusting screw (92) with one end screwed to the threaded hole and penetrating through the threaded hole to be connected to the pushing block (91).
5. The pilot operated relief valve with a filter device according to claim 1 or 2, characterized in that: the filter screen blocking component (5) comprises a fixed gasket (51) arranged on the filter screen (4), an oil through hole (52) arranged in the middle of the fixed gasket (51) and used for allowing hydraulic oil filtered by the filter screen (4) to pass through, an alarm indication board, a first spring (53) arranged on the fixed gasket (51), a transmission connecting rod (54) with one end connected to the first spring (53) and the other end connected to the alarm indication board, and a fixing frame (55) used for supporting the transmission connecting rod (54), an observation hole (7) for observing the alarm indication board is arranged on the pilot valve body (2), the alarm indication board comprises a green board (57) arranged at the bottom of the observation hole (7) and a red board (56) which is used for driving the transmission connecting rod (54) to move to the bottom of the observation hole (7) by the extrusion and pulling of the first spring (53) under the stress when the filter screen (4) is blocked.
6. The pilot operated relief valve with filter device according to claim 5, wherein: the first spring (53) is a belleville spring.
7. The pilot operated relief valve with filter device according to claim 3, wherein: the adjusting cavity is communicated with the main oil way oil outlet (12).
8. The pilot operated relief valve with a filter device according to claim 1 or 2, characterized in that: the bottom end of the main valve core (13) is an isosceles trapezoid block, the sectional area of the bottom end of the isosceles trapezoid block is smaller than that of the top end of the main oil way oil inlet (11), and the sectional area of the top end of the isosceles trapezoid block is larger than that of the top end of the main oil way oil inlet (11).
9. The pilot operated relief valve with a filter device according to claim 1 or 2, characterized in that: the main valve core damping hole (131) is formed in the middle of the main valve core (13), and the center line of the main valve core damping hole (131) is overlapped with the center line of the main valve core (13).
10. The pilot operated relief valve with filter device according to claim 4, wherein: the adjusting structure (9) further comprises an adjusting hand wheel (93) arranged at one end of the adjusting screw (92).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597862.1U CN211550123U (en) | 2019-09-25 | 2019-09-25 | Pilot-operated overflow valve with filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597862.1U CN211550123U (en) | 2019-09-25 | 2019-09-25 | Pilot-operated overflow valve with filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211550123U true CN211550123U (en) | 2020-09-22 |
Family
ID=72497253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921597862.1U Expired - Fee Related CN211550123U (en) | 2019-09-25 | 2019-09-25 | Pilot-operated overflow valve with filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211550123U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727835A (en) * | 2021-01-15 | 2021-04-30 | 山东工业职业学院 | Hydraulic self-filtering overflow valve |
| CN113217496A (en) * | 2021-05-19 | 2021-08-06 | 刘含 | Hydraulic valve with function of controlling liquid flow speed and using method |
| CN117570076A (en) * | 2024-01-15 | 2024-02-20 | 无锡煤矿机械股份有限公司 | Overflow valve |
-
2019
- 2019-09-25 CN CN201921597862.1U patent/CN211550123U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727835A (en) * | 2021-01-15 | 2021-04-30 | 山东工业职业学院 | Hydraulic self-filtering overflow valve |
| CN113217496A (en) * | 2021-05-19 | 2021-08-06 | 刘含 | Hydraulic valve with function of controlling liquid flow speed and using method |
| CN113217496B (en) * | 2021-05-19 | 2022-06-14 | 宁波隆而法液压有限公司 | Hydraulic valve with function of controlling liquid flow speed and using method |
| CN117570076A (en) * | 2024-01-15 | 2024-02-20 | 无锡煤矿机械股份有限公司 | Overflow valve |
| CN117570076B (en) * | 2024-01-15 | 2024-03-15 | 无锡煤矿机械股份有限公司 | Overflow valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huzhou Branch of Guangzhou Sound Channel AV Technology Co.,Ltd. Assignor: HUZHOU VOCATIONAL TECHNOLOGY College Contract record no.: X2022330000773 Denomination of utility model: A pilot operated relief valve with filtering device Granted publication date: 20200922 License type: Common License Record date: 20221215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 |