CN210372193U - Pilot valve for hydraulic control valve - Google Patents
Pilot valve for hydraulic control valve Download PDFInfo
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- CN210372193U CN210372193U CN201921423365.XU CN201921423365U CN210372193U CN 210372193 U CN210372193 U CN 210372193U CN 201921423365 U CN201921423365 U CN 201921423365U CN 210372193 U CN210372193 U CN 210372193U
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- valve
- spring
- valve body
- pressure sensing
- hydraulic control
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Abstract
The utility model relates to the field of valves of pipeline systems, in particular to a pilot valve for a hydraulic control valve, which mainly comprises a valve body and a valve cover, wherein a valve core is nested in the valve body in a sliding manner, the top of the valve body and the bottom of the valve cover are both connected with flanges, the flanges are fixedly connected through a bolt detachable manner, the two flanges are clamped at the outer edge of a diaphragm, the valve core and the diaphragm pressing plate clamp the middle position of the diaphragm through a nut, a spring cavity is arranged in the valve cover, a spring is placed in the spring cavity, and the bottom end of the spring is placed on the upper surface of the; the valve body is provided with an inlet, an outlet and a pressure sensing interface, the diaphragm and the upper part of the valve body form a pressure sensing cavity and are communicated with the pressure sensing interface through a small hole, the valve body is internally provided with a valve guide cavity which is communicated with the outlet, the valve core is provided with a plurality of flow passage holes, and the pressure sensing interface is communicated with the inlet. The utility model discloses the advantage: simple structure adjusts accurately, connects stably, and induction pressure is adjustable, the facilitate promotion implementation.
Description
Technical Field
The utility model relates to a pipe-line system valve specifically is a pilot valve that hydraulic control valve was used.
Background
The hydraulic control valve is a valve controlled by water pressure and consists of a main valve and a guide pipe, a pilot valve, a needle valve, a ball valve, a pressure gauge and the like which are attached to the main valve. The remote control ball valve, the pressure reducing valve, the slow-closing check valve, the flow control valve, the pressure relief valve, the hydraulic power electric control valve, the water pump control valve and the like can be developed according to different use purposes, functions and places. A filter is arranged in front of the hydraulic control valve, and the requirement of sewage discharge is met. The valve of this type should be generally installed horizontally in the pipeline. At present, the sealing structure principle of a valve core of a pilot valve for a hydraulic control valve is in a stop valve form, the direction of a sealing surface of a valve seat is perpendicular to the movement direction of the valve core, and when the closing force is too large or impurities exist between the sealing surfaces, the sealing surface is easily damaged, so that the performance of the pilot valve is lost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pilot valve that hydraulic control valve was used to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a pilot valve for hydraulic control valve is composed of valve body and valve cover. The inside slip nestification of valve body has the case, and the top of valve body and the bottom of valve gap all are connected with the flange. The valve body is detachably and fixedly connected with the flange on the valve cover through a bolt. The two flanges are clamped to the outer edge of the diaphragm, thereby fixing the diaphragm. The valve core and the diaphragm pressing plate clamp the middle position of the diaphragm through a nut. The valve core is inserted into a central inner hole of the valve body, a spring cavity is formed in the valve cover, a spring is placed in the spring cavity, and the bottom end of the spring is placed on the upper surface of the diaphragm pressing plate.
The valve body is provided with three openings, namely an inlet, an outlet and a pressure sensing interface. The clamped diaphragm and the upper part of the valve body form a pressure sensing cavity, and the pressure sensing interface is communicated with the pressure sensing cavity through a small hole. The valve body is internally provided with a valve guide cavity which is communicated with the outlet. The valve core is provided with a plurality of flow passage holes, and the pressure sensing interface is communicated with the inlet. The valve core moves upwards, the opening degree of a flow passage hole on the valve core is gradually increased, and the medium flows into the valve guide cavity and flows out through the outlet; on the contrary, when the pressure in the pipeline system is reduced, the spring gradually relaxes, the valve core moves downwards along with the spring, and the opening degree of the flow passage hole on the valve core is gradually reduced and even closed.
As a further aspect of the present invention: the middle part of the valve core is disc-shaped.
As a further aspect of the present invention: the spring cavity is a non-cylindrical barrel.
As a further aspect of the present invention: the top of valve gap has been seted up the perforation, and the perforation is inside to rotate the nestification to have adjusting screw, and threaded connection has adjusting nut on the adjusting screw, and adjusting nut presses the top at the spring. The spring is clamped between the diaphragm pressure plate and the adjusting nut. When the adjusting screw rod is rotated clockwise or anticlockwise, the adjusting nut moves upwards or downwards along with the adjusting screw rod, the compression amount of the spring can be changed, different spring forces are generated, and different sensing pressures are changed.
As a further aspect of the present invention: the shaft shoulder at the middle part of the adjusting screw rod enters the counter bore of the valve cover to play a role of thrust.
As a further aspect of the present invention: the valve guide cavity is of an annular structure and is positioned on the periphery of the valve core.
As a further aspect of the present invention: the top of the adjusting screw is in threaded connection with the hexagon nut, and the adjusting screw can be locked through the hexagon nut, so that the rotation of the adjusting screw is avoided.
Compared with the prior art, the beneficial effects of the utility model are that: the valve core moves upwards, the opening degree of a flow passage hole on the valve core is gradually increased, and the medium flows into the valve guide cavity and flows out through the outlet; on the contrary, when the pressure in the pipeline system is reduced, the spring gradually relaxes, the valve core moves downwards along with the spring, and the opening degree of the flow passage hole in the valve core is gradually reduced and even closed, so that the adjustment is completed. When the adjusting screw rod is rotated clockwise or anticlockwise, the adjusting nut moves upwards or downwards along with the adjusting screw rod, the compression amount of the spring can be changed, different spring forces are generated, and different sensing pressures are changed. The adjusting screw rod can be locked through the hexagonal nut, so that the rotation of the adjusting screw rod is avoided. The utility model discloses the advantage: simple structure adjusts accurately, connects stably, and induction pressure is adjustable, the facilitate promotion implementation.
Drawings
Fig. 1 is a schematic structural diagram of a pilot valve for a hydraulic control valve.
Fig. 2 is a schematic structural diagram of a valve core in a pilot valve for a hydraulic control valve.
Fig. 3 is a schematic structural diagram of an adjusting screw in a pilot valve for a hydraulic control valve.
In the figure, a valve body 1, a valve core 2, a diaphragm 3, a diaphragm pressure plate 4, a spring 5, a valve cover 6, an adjusting nut 7, an adjusting screw 8, a hexagon nut 9, an inlet 10, an outlet 11, a pressure sensing interface 12, a flow passage hole 13, a valve guide cavity 14, a pressure sensing cavity 15 and a spring cavity 16.
Detailed Description
In order to clearly understand the technical features, objects and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.
Example 1
Referring to fig. 1-3, a pilot valve for hydraulic control valve mainly includes a valve body 1 and a valve cover 6. The inside slip nestification of valve body 1 has case 2, and the middle part of case 2 is discoid, and the top of valve body 1 and the bottom of valve gap 6 all are connected with the flange. The valve body 1 and the flange on the valve cover 6 are fixedly connected in a detachable mode through bolts. The two flanges are clamped to the outer edge of the membrane 3, thereby fixing the membrane 3. The valve core 2 and the diaphragm pressing plate 4 clamp the middle position of the diaphragm 3 through a nut. During case 2 inserted the central hole of valve body 1, valve gap 6 is inside to be offered the spring chamber 16 that is non-cylindrical barrel, and spring 5 has been placed to spring chamber 16 inside, and the upper surface at diaphragm clamp plate 4 is placed to the bottom of spring 5. The top of valve gap 6 has been seted up the perforation, and the perforation is inside to rotate the nestification to have adjusting screw 8, and threaded connection has adjusting nut 7 on adjusting screw 8, and adjusting nut 7 presses at the top of spring 5. The spring 5 is held between the diaphragm pressing plate 4 and the adjusting nut 7. By rotating the adjusting screw 8 clockwise or counterclockwise, the adjusting nut 7 will move up or down, which changes the compression of the spring 5, and generates different spring forces, thereby changing the different sensing pressures. The shaft shoulder at the middle part of the adjusting screw rod 8 enters the counter bore of the valve cover 6 to play a role of thrust.
The valve body 1 is provided with three openings, namely an inlet 10, an outlet 11 and a pressure sensing interface 12. The clamped diaphragm 3 and the upper part of the valve body 1 form a pressure sensing cavity 15, and a small hole is communicated between the pressure sensing interface 12 and the pressure sensing cavity 15. The valve body 1 is internally provided with a valve guide cavity 14, and the valve guide cavity 14 is of a circular structure and is positioned at the periphery of the valve core 2. The valve guide chamber 14 communicates with the outlet 11. The valve core 2 is provided with a plurality of flow passage holes 13, and the pressure sensing interface 12 is communicated with the inlet 10. The valve core 2 moves upwards along with the valve core 2, the opening degree of the flow passage hole 13 on the valve core 2 is gradually increased, and the medium flows into the valve guide cavity 14 and flows out through the outlet 11; on the contrary, when the pressure in the pipeline system is reduced, the spring 5 gradually expands, the valve core 2 moves downwards along with the spring, and the opening degree of the flow passage hole 13 on the valve core is gradually reduced and even closed.
The utility model discloses a theory of operation is: the system pressure of the pressure sensing interface 12 is transmitted to the inside of the pressure sensing cavity 15 through the small hole, and upward thrust is formed below the diaphragm 3, so that the compression force of the valve core 2 and the spring 5 is balanced, and the valve core 2 is kept at a certain opening position. When the pressure in the pipeline system is increased, the spring 5 is further compressed, the valve core 2 moves upwards along with the spring, the opening degree of the flow passage hole 13 in the valve core 2 is gradually increased, and the medium flows into the valve guide cavity 14 and flows out through the outlet 11; on the contrary, when the pressure in the pipeline system is reduced, the spring 5 gradually expands, the valve core 2 moves downwards along with the spring, and the opening degree of the flow passage hole 13 on the valve core is gradually reduced and even closed. By rotating the adjusting screw 8 clockwise or counterclockwise, the adjusting nut 7 will move up or down, which changes the compression of the spring 5, and generates different spring forces, thereby changing the different sensing pressures.
Example 2
On the basis of embodiment 1, the top of adjusting screw 8 is in threaded connection with hexagon nut 9, and adjusting screw 8 can be locked through hexagon nut 9, so that adjusting screw 8 is prevented from rotating.
The above-mentioned embodiments only represent the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. The pilot valve for the hydraulic control valve mainly comprises a valve body (1) and a valve cover (6), wherein a valve core (2) is nested in the valve body (1) in a sliding mode, the top of the valve body (1) and the bottom of the valve cover (6) are connected with flanges, and the flanges are fixedly connected through bolts in a detachable mode;
the pressure sensing valve is characterized in that an inlet (10), an outlet (11) and a pressure sensing interface (12) are formed in the valve body (1), a pressure sensing cavity (15) is formed between the diaphragm (3) and the upper portion of the valve body (1) and is communicated with the pressure sensing interface through a small hole, a guide valve cavity (14) is formed in the valve body (1), the guide valve cavity (14) is communicated with the outlet (11), a plurality of flow passage holes (13) are formed in the valve core (2), and the pressure sensing interface (12) is communicated with the inlet (10).
2. A pilot valve for a hydraulic control valve according to claim 1, wherein the valve member (2) is disc-shaped in the middle.
3. A pilot valve for a hydraulic control valve according to claim 1, wherein the spring chamber (16) is a non-cylindrical cylinder.
4. A pilot valve for a hydraulic control valve according to any one of claims 1 to 3, wherein a through hole is formed in the top of the valve cover (6), an adjusting screw (8) is rotatably nested in the through hole, an adjusting nut (7) is connected to the adjusting screw (8) in a threaded manner, the adjusting nut (7) presses on the top of the spring (5), and the spring (5) is clamped between the diaphragm pressing plate (4) and the adjusting nut (7).
5. A pilot valve for hydraulic control valves according to claim 4, characterized in that the adjusting screw (8) is provided with a thrust shoulder in the middle.
6. A pilot valve for hydraulic control valves according to claim 1, characterized in that the pilot valve chamber (14) is of annular configuration and is located at the periphery of the valve core (2).
7. A pilot valve for hydraulic control valves according to claim 4, characterized in that the top of the adjusting screw (8) is screwed with a hexagonal nut (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921423365.XU CN210372193U (en) | 2019-08-29 | 2019-08-29 | Pilot valve for hydraulic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921423365.XU CN210372193U (en) | 2019-08-29 | 2019-08-29 | Pilot valve for hydraulic control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210372193U true CN210372193U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921423365.XU Active CN210372193U (en) | 2019-08-29 | 2019-08-29 | Pilot valve for hydraulic control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210372193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669468A (en) * | 2021-08-27 | 2021-11-19 | 江苏前沿环境科技有限公司 | Diaphragm straight-through type on-way air supplement unit |
-
2019
- 2019-08-29 CN CN201921423365.XU patent/CN210372193U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669468A (en) * | 2021-08-27 | 2021-11-19 | 江苏前沿环境科技有限公司 | Diaphragm straight-through type on-way air supplement unit |
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