CN209818764U - Pilot valve for pressure reducing valve - Google Patents
Pilot valve for pressure reducing valve Download PDFInfo
- Publication number
- CN209818764U CN209818764U CN201920461038.7U CN201920461038U CN209818764U CN 209818764 U CN209818764 U CN 209818764U CN 201920461038 U CN201920461038 U CN 201920461038U CN 209818764 U CN209818764 U CN 209818764U
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- China
- Prior art keywords
- hole
- valve
- valve body
- sleeve
- pressure reducing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a pilot valve for relief pressure valve, it includes upper valve body and lower valve body, and the top of upper valve body is provided with adjusting device, and adjusting device's lower extreme is located and is provided with compression spring in the upper valve body, has seted up import and export on the lower valve body, the middle part of lower valve body is provided with vertical through-hole, and sliding connection has a central rod in the through-hole, and the lower extreme of central rod is provided with throttling arrangement, the upper end an organic whole of lower valve body is provided with vertical sleeve, and the sleeve fit in is provided with the piston, and compression spring's lower extreme butt is on the upper surface of piston, and the upper end; the inlet is communicated with the middle part of the through hole, the outlet is communicated with the lower end of the through hole through a throttling device, and the outlet is communicated with the lower end of the sleeve. The utility model discloses have the effect that improves its life.
Description
Technical Field
The utility model belongs to the technical field of a relief pressure valve structure's technique and specifically relates to a pilot valve for relief pressure valve.
Background
The pressure reducing valve is a common pressure control element in a hydraulic system, is a pressure regulating valve and is commonly used for stabilizing the working pressure of an oil way. The pressure reducing valve is classified into a direct-acting type pressure reducing valve and a pilot type pressure reducing valve according to different structures and working principles. The pilot type pressure reducing valve needs to use a pilot valve as a control mechanism for controlling the main valve, and the pilot valve is a functional part of an external control pipeline core of the pressure reducing valve and is used for adjusting the opening and closing size of the main valve, so that the downstream pressure of the main valve is controlled.
Patent document No. CN202812359U discloses a pilot valve for a pressure reducing valve, which includes an upper valve body and a lower valve body; the top end of the upper valve body is provided with an internal thread part, and a pressure setting screw penetrates through the internal thread part; the lower valve body is provided with an upstream pipeline and a downstream pipeline which are communicated to the inner cavity of the lower valve body; the linkage closing system is positioned on the central line and comprises a central rod, the lower end of the central rod penetrates out of the upstream pipeline, a spring, a diaphragm and a baffle plate sequentially penetrate through the central rod from top to bottom, the spring is positioned at the top end of the central rod, the diaphragm is fixed in the middle of the central rod through a clamping block, the edge of the diaphragm is clamped between the upper valve body and the lower valve body, and the baffle plate is fixed at the bottom end of the central rod and is opposite to the pipe orifice of the upstream pipeline; the top end of the spring is also provided with a pressing block, and the bottom end of the pressure setting screw abuts against the pressing block.
The diaphragm is fixed on the central rod in the structure, and when the diaphragm works, the pressure is adjusted by vibrating the central rod up and down under the action of the spring, so that the central rod drives the diaphragm to vibrate, and the diaphragm is easy to age in the continuous folding process, so that the service life of the diaphragm is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pilot valve for relief pressure valve, it has the effect that improves its life.
The above object of the present invention is achieved by the following technical solutions:
a pilot valve for a pressure reducing valve comprises an upper valve body and a lower valve body, wherein an adjusting device is arranged at the top end of the upper valve body, a compression spring is arranged at the lower end of the adjusting device in the upper valve body, an inlet and an outlet are formed in the lower valve body, a vertical through hole is formed in the middle of the lower valve body, a central rod is connected in the through hole in a sliding mode, a throttling device is arranged at the lower end of the central rod, a vertical sleeve is integrally arranged at the upper end of the lower valve body, a piston is arranged in the sleeve in a matched mode, the lower end of the compression spring abuts against the upper surface of the; the inlet is communicated with the middle part of the through hole, the outlet is communicated with the lower end of the through hole through a throttling device, and the outlet is communicated with the lower end of the sleeve.
Through adopting above-mentioned technical scheme, go up the sleeve that sets up between valve body and the lower valve body, be provided with the piston in the sleeve, export and telescopic lower extreme intercommunication, compression spring's lower extreme butt is at the piston, divide the sleeve into two parts through the piston, the lower surface that makes the piston communicates with the liquid that the export flows, the export still communicates through the lower extreme of throttling arrangement with the through-hole, thereby after getting into the liquid that has pressure in the import, the liquid pressure in exit changes the back, liquid is pushing piston and is sliding from top to bottom in the sleeve, thereby make its upper and lower slip through the piston, and then improve its life.
The utility model discloses further set up to: the side wall of the upper valve body is provided with a vent hole, and the vent hole is communicated with the upper end of the sleeve.
Through adopting above-mentioned technical scheme, set up the air vent on the lateral wall of last valve body, the air vent can make the upper end of sleeve and external atmosphere intercommunication, makes the reciprocating process of piston easier.
The utility model discloses further set up to: the piston comprises a body and a sealing ring, the body is cylindrical and matched with the inner wall of the sleeve, a first annular groove is formed in the side wall of the body, the sealing ring is located in the first annular groove, and the sealing ring is in abutting seal with the inner wall of the sleeve.
Through adopting above-mentioned technical scheme, the body cooperates with telescopic inner wall, offers ring channel one on the lateral wall of body, and the sealing washer is located ring channel one, and ring channel one is located the body, makes the processing of ring channel one more convenient, and on the other hand makes the leakproofness better between body and the sleeve, and sealing washer life is longer in ring channel one.
The utility model discloses further set up to: and a second annular groove is formed in the matched part of the central rod and the through hole, an O-shaped ring is arranged in the second annular groove, and the O-shaped ring is abutted against the inner wall of the through hole.
By adopting the technical scheme, the second annular groove is formed in the part, matched with the through hole, of the central rod, and the O-shaped ring is arranged in the second annular groove, so that the O-shaped ring is positioned in the second annular groove, and the sealing performance of the central rod in the through hole is better.
The utility model discloses further set up to: the throttling device comprises a top cap, an extrusion spring and a conical surface arranged at the lower end of the central rod, the conical surface is positioned at the lower end of the through hole, and the diameter of the large end of the conical surface is equal to that of the through hole; the top cap is in threaded connection with the lower end of the lower valve body, the extrusion spring abuts between the top cap and the central rod, and the length direction of the extrusion spring is vertically arranged.
Through adopting above-mentioned technical scheme, the hood is connected on valve body down, makes to accompany the extrusion spring between hood and the well core rod, and at well core rod upward movement's in-process, provides the thrust of upward movement to well core rod by the extrusion spring to make the clearance between conical surface and the through-hole lower extreme change, throttle the lower extreme position of through-hole.
The utility model discloses further set up to: be provided with the sealing plug between well core rod and the extrusion spring, the sealing plug includes cock body and seal receptacle, and the vertical sliding connection of cock body is on the hood, and the caulking hole has been seted up to the upper end of cock body, and the seal receptacle is located the caulking hole to well core rod's lower extreme runs through the middle part of seal receptacle, and the lower extreme of conical surface supports on the seal receptacle, and the upper surface of seal receptacle is used for stifled lower extreme at the through-hole.
Through adopting above-mentioned technical scheme, cock body sliding connection leads under the effect that makes well core rod's lower extreme and can the cock body on the hood to make well core rod keep vertical setting in the through-hole.
The utility model discloses further set up to: the sealing seat is made of vulcanized rubber.
Through adopting above-mentioned technical scheme, the seal receptacle is made through the rubber of vulcanization processing, increases the intensity of seal receptacle on the one hand, and on the other hand makes the connection of seal receptacle and cock body more firm, reduces the drop of seal receptacle.
The utility model discloses further set up to: and a flange is arranged on the lower end surface of the through hole along the circumferential direction of the through hole, and the sealing seat is used for abutting against the flange.
Through adopting above-mentioned technical scheme, set up the flange on the lower terminal surface of through-hole, the seal receptacle passes through the butt on the flange, and the deformation of flange to the seal receptacle increases to can increase the seal receptacle to the leakproofness of through-hole lower extreme.
The utility model discloses further set up to: the adjusting device comprises a pressing block and a screw rod, the screw rod is vertically arranged, the screw rod is in threaded connection with the upper valve body, the pressing block is pressed at the upper end of the compression spring, and the lower end of the screw rod is abutted to the upper surface of the pressing block.
Through adopting above-mentioned technical scheme, the lower extreme of screw rod sets up the briquetting, and when rotating the screw rod, relative rotation between briquetting and the screw rod to make the briquetting support in compression spring's upper end, reduce the jump of compression spring in the accommodation process.
The utility model discloses further set up to: the lower end of the screw rod is provided with a cone, the upper surface of the pressing block is provided with a cone hole, and the lower end of the screw rod is inserted into the cone hole.
By adopting the technical scheme, the lower end of the screw rod is arranged into a cone shape and inserted into the cone-shaped hole, so that the center of the pressing block is coincided with the center of the screw rod, and the pressing block is prevented from being dislocated with the screw rod.
To sum up, the utility model discloses a beneficial technological effect does:
1. through the sleeve arranged between the upper valve body and the lower valve body, the piston is arranged in the sleeve, the outlet is communicated with the lower end of the sleeve, the lower end of the compression spring is abutted against the piston, the sleeve is divided into two parts through the piston, the lower surface of the piston is communicated with liquid flowing out of the outlet, the outlet is also communicated with the lower end of the through hole through the throttling device, and therefore after the liquid with pressure enters the inlet, the liquid pushes the piston to slide up and down in the sleeve after the pressure of the liquid at the outlet is changed, so that the piston can slide up and down through the up-and-down sliding of the piston, and the service life of;
2. the sealing ring is arranged on the body, so that the first annular groove is convenient to process, the sealing performance between the body and the sleeve is better, and the service life of the sealing ring in the first annular groove is longer;
3. through the rubber preparation that carries out vulcanization processing with the seal receptacle, increase the intensity of seal receptacle on the one hand, on the other hand makes being connected of seal receptacle and cock body more can be firm, reduces the drop of seal receptacle.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
In the figure, 1, an upper valve body; 11. a vent hole; 2. a lower valve body; 21. an inlet; 22. an outlet; 23. a sleeve; 24. a through hole; 3. a center pole; 31. a second annular groove; 32. an O-shaped ring; 4. a piston; 41. a body; 42. a seal ring; 43. a first annular groove; 5. a compression spring; 6. an adjustment device; 61. briquetting; 62. a screw; 63. a tapered hole; 7. a throttling device; 71. a top cap; 72. a compression spring; 73. a conical surface; 74. a guide hole; 75. a sealing plug; 751. a plug body; 752. a sealing seat; 753. embedding holes; 8. a flange.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a pilot valve for relief pressure valve, including last valve body 1 and lower valve body 2, be provided with sleeve 23 with the junction of last valve body 1 on the lower valve body 2, sleeve 23 an organic whole sets up on lower valve body 2, has seted up the external screw thread on the outer wall of sleeve 23, goes up valve body 1 threaded connection on the outer wall of sleeve 23. The center of the lower valve body 2 is provided with a vertical through hole 24, the center line of the through hole 24 is overlapped with the center line of the sleeve 23, a center rod 3 is arranged in the through hole 24, the center rod 3 is vertically and slidably connected in the through hole 24, the center rod 3 can slide along the length direction of the through hole 24, and the upper end face of the center rod 3 abuts against the lower surface of the piston 4. The piston 4 is arranged in the sleeve 23, the sleeve 23 is cylindrical, the piston 4 is arranged in the sleeve 23 in a matched mode, the piston 4 comprises a body 41 and a sealing ring 42, the body 41 is cylindrical, the diameter of the body 41 is equal to that of the sleeve 23, a first annular groove 43 is formed in the side wall of the body 41, the sealing ring 42 is embedded into the first annular groove 43, the sealing ring 42 abuts against the inner wall of the sleeve 23, and the sealing performance between the piston 4 and the inner wall of the sleeve 23 is better. The upper surface of the piston 4 is provided with a compression spring 5, the compression spring 5 is vertically arranged, the central line of the compression spring 5 is superposed with the central line of the sleeve 23, the lower end of the compression spring 5 is abutted against the upper surface of the piston 4, the upper end of the compression spring is provided with an adjusting device 6, and the adjusting device 6 is used for adjusting the elasticity of the compression spring 5.
Referring to fig. 1, an inlet 21 and an outlet 22 are formed in a lower valve body 2, the diameter of the upper end of a central rod 3 is equal to that of a through hole 24, an annular groove two 31 is formed in the side wall of the upper end of the central rod 3, an O-ring 32 is arranged in the annular groove two 31, and the O-ring 32 abuts against the inner wall of the through hole 24; the diameter of the lower end of the central rod 3 is smaller than that of the through hole 24, the inlet 21 is communicated with the middle of the through hole 24, and the communication between the inlet 21 and the through hole 24 is positioned at the position where the diameter of the central rod 3 is smaller. The lower end of the central rod 3 is provided with a throttling device 7, and the throttling device 7 is positioned at the lower end outlet 22 of the through hole 24; the outlet 22 is connected with the lower end of the through hole 24 through the throttling device 7, so that the pressure of the liquid flowing into the inlet 21 is greater than that of the liquid flowing out of the outlet 22, and the outlet 22 is also communicated with the lower end of the sleeve 23; a vent hole 11 is arranged on the side wall of the upper valve body 1, and the vent hole 11 is communicated with the upper end of the sleeve 23. When the liquid at the outlet 22 rises hydraulically, the liquid pressure at the outlet 22 flows into the lower end of the sleeve 23, and the liquid pressure received by the lower surface of the piston 4 rises, thereby moving the throttling means 7 at the lower end of the central rod 3, thereby increasing the throttling amount of the throttling means 7, and thereby decreasing the pressure at the outlet 22.
Referring to fig. 1 and 2, the throttling device 7 includes a top cap 71, a pressing spring 72 and a tapered surface 73 disposed at the lower end of the central rod 3, the top cap 71 is located at the lower end of the lower valve body 2, the top cap 71 is screwed on the lower valve body 2, so that the top cap 71 is detachably connected to the lower valve body 2, a guide hole 74 is formed in the top cap 71, the center line of the guide hole 74 coincides with the center line of the through hole 24, a sealing plug 75 is fittingly disposed in the guide hole 74, the sealing plug 75 includes a plug 751 and a sealing seat 752, the plug 751 is slidably connected in the guide hole 74, an insertion hole 753 is formed at the upper end of the plug 751, the sealing seat 752 is inserted in the insertion hole 753, and the sealing seat 752 is vulcanized, so that the sealing seat 752 and the plug 751 are bonded together, thereby reducing the sealing seat 752 from falling off from the plug 751. The lower end of the center rod 3 penetrates the middle of the seal holder 752, and the large end of the tapered surface 73 abuts downward against the upper surface of the seal holder 752. The tapered surface 73 is located outside the lower end of the through-hole 24, and the diameter of the large end of the tapered surface 73 is equal to the lower diameter of the lower end of the through-hole 24. When the conical surface 73 moves upwards with the central rod 3, the conical surface 73 and the flow cross section of the through hole 24 can be reduced, so that the liquid is throttled at the conical surface 73. The pressing spring 72 is located in the guide hole 74, and the pressing spring 72 is vertically disposed, the lower end of the pressing spring 72 abuts against the lower end of the guide hole 74, and the upper end of the pressing spring 72 abuts against the plug 751, so that the plug 751 presses the seal holder 752 against the large end of the tapered surface 73.
Referring to fig. 2, a flange 8 is provided on an end surface of a lower end of the through hole 24 along a circumferential direction of the through hole 24, an upper surface of the sealing seat 752 corresponds to the flange 8, and when a pressure of the liquid entering the inlet 21 is small, the upper surface of the sealing seat 752 is pressed against the flange 8, so that the sealing seat 752 seals the lower end of the through hole 24.
Referring to fig. 1, the adjusting device 6 includes a pressing block 61 and a screw 62, the screw 62 is vertically disposed, a lower end of the screw 62 is tapered, the pressing block 61 is disposed at a lower end of the screw 62, a tapered hole 63 is formed on an upper surface of the pressing block 61, the lower end of the screw 62 is inserted into the tapered hole 63, and an upper end of the compression spring 5 abuts against a lower surface of the pressing block 61. The screw 62 is screwed to the upper valve body 1.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (10)
1. The utility model provides a pilot valve for relief pressure valve, includes valve body (1) and lower valve body (2), and the top of going up valve body (1) is provided with adjusting device (6), and the lower extreme of adjusting device (6) is located and is provided with compression spring (5) in valve body (1), has seted up import (21) and export (22) on lower valve body (2), its characterized in that: a vertical through hole (24) is formed in the middle of the lower valve body (2), a central rod (3) is connected in the through hole (24) in a sliding mode, a throttling device (7) is arranged at the lower end of the central rod (3), a vertical sleeve (23) is integrally arranged at the upper end of the lower valve body (2), a piston (4) is arranged in the sleeve (23) in a matched mode, the lower end of a compression spring (5) abuts against the upper surface of the piston (4), and the upper end of the central rod (3) abuts against the lower surface of the piston (4); the inlet (21) is communicated with the middle of the through hole (24), the outlet (22) is communicated with the lower end of the through hole (24) through the throttling device (7), and the outlet (22) is communicated with the lower end of the sleeve (23).
2. A pilot valve for a pressure reducing valve as claimed in claim 1, wherein: a vent hole (11) is formed in the side wall of the upper valve body (1), and the vent hole (11) is communicated with the upper end of the sleeve (23).
3. A pilot valve for a pressure reducing valve according to claim 1 or 2, wherein: piston (4) include body (41) and sealing washer (42), and body (41) are the inner wall cooperation of cylindrical and sleeve (23), annular groove one (43) have been seted up on the lateral wall of body (41), and sealing washer (42) are located annular groove one (43), and sealing washer (42) contradict with the inner wall of sleeve (23) and seal.
4. A pilot valve for a pressure reducing valve as claimed in claim 3, wherein: and a second annular groove (31) is formed in the part, matched with the through hole (24), of the central rod (3), an O-shaped ring (32) is arranged in the second annular groove (31), and the O-shaped ring (32) abuts against the inner wall of the through hole (24).
5. A pilot valve for a pressure reducing valve as claimed in claim 1, wherein: the throttling device (7) comprises a top cap (71), an extrusion spring (72) and a conical surface (73) arranged at the lower end of the central rod (3), the conical surface (73) is positioned at the lower end of the through hole (24), and the diameter of the large end of the conical surface (73) is equal to that of the through hole (24); the top cap (71) is in threaded connection with the lower end of the lower valve body (2), the extrusion spring (72) abuts between the top cap (71) and the central rod (3), and the length direction of the extrusion spring (72) is vertically arranged.
6. A pilot valve for a pressure reducing valve according to claim 5, wherein: be provided with sealing plug (75) between well core rod (3) and extrusion spring (72), sealing plug (75) are including cock body (751) and seal receptacle (752), vertical sliding connection of cock body (751) is on hood (71), caulking hole (753) has been seted up to the upper end of cock body (751), seal receptacle (752) are located caulking hole (753), and the lower extreme of well core rod (3) runs through the middle part of seal receptacle (752), the lower extreme of conical surface (73) supports on seal receptacle (752), the upper surface of seal receptacle (752) is used for stifled the lower extreme at through-hole (24).
7. A pilot valve for a pressure reducing valve as claimed in claim 6, wherein: the sealing seat (752) is made of vulcanized rubber.
8. A pilot valve for a pressure reducing valve according to claim 5 or 6, wherein: a flange (8) is arranged on the lower end face of the through hole (24) along the circumferential direction of the through hole (24), and the sealing seat (752) is used for abutting against the flange (8).
9. A pilot valve for a pressure reducing valve as claimed in claim 1, wherein: adjusting device (6) are including briquetting (61) and screw rod (62), and screw rod (62) vertical setting, and screw rod (62) threaded connection is on last valve body (1), and briquetting (61) are pressed in the upper end of compression spring (5), and the lower extreme butt of screw rod (62) is at the upper surface of briquetting (61).
10. A pilot valve for a pressure reducing valve as claimed in claim 9, wherein: the lower end of the screw rod (62) is provided with a cone, the upper surface of the pressing block (61) is provided with a cone-shaped hole (63), and the lower end of the screw rod (62) is inserted into the cone-shaped hole (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920461038.7U CN209818764U (en) | 2019-04-04 | 2019-04-04 | Pilot valve for pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920461038.7U CN209818764U (en) | 2019-04-04 | 2019-04-04 | Pilot valve for pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818764U true CN209818764U (en) | 2019-12-20 |
Family
ID=68879126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920461038.7U Expired - Fee Related CN209818764U (en) | 2019-04-04 | 2019-04-04 | Pilot valve for pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209818764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017381A (en) * | 2019-04-04 | 2019-07-16 | 北消安全设备(北京)有限公司 | A kind of pilot valve for pressure reducing valve |
-
2019
- 2019-04-04 CN CN201920461038.7U patent/CN209818764U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017381A (en) * | 2019-04-04 | 2019-07-16 | 北消安全设备(北京)有限公司 | A kind of pilot valve for pressure reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20191220 Termination date: 20210404 |