CN214305408U

CN214305408U - Stacked three-way pilot control pressure reducing valve

Info

Publication number: CN214305408U
Application number: CN202120231566.0U
Authority: CN
Inventors: 宋兆柱
Original assignee: Beijing Hongji Shida Hydraulic Co ltd
Current assignee: Beijing Hongji Shida Hydraulic Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-09-28
Anticipated expiration: 2031-01-27

Abstract

The application relates to a stacked three-way pilot control pressure reducing valve, which comprises a main valve, wherein a slide way is arranged in the main valve, a valve core is connected in the slide way in a sliding manner, a spring cavity which is communicated with the slide way and is parallel to the slide way is arranged in the main valve, a valve seat is fixed at the position, far away from the slide way, of the spring cavity, and a through hole is formed in the valve seat; a return spring is arranged in the spring cavity, one end of the return spring is fixed with the valve seat, and the other end of the return spring is fixed with the end head of the valve core; the bottom of the main valve is provided with an oil inlet communicated with the slideway, the top of the main valve is provided with an oil outlet communicated with the slideway, the end of the valve core is provided with a transverse oil duct, and the circumferential side wall of the valve core is provided with a vertical oil duct; the lateral wall that the main valve is close to the disk seat is fixed with the pilot valve, has the proportion electro-magnet on the pilot valve, and the pilot valve is inside to be seted up and to be communicated in the pilot chamber of through-hole, and the intracavity of pilot slides and is connected with the cone valve that is used for sealing and opening the through-hole, and the main valve surface is seted up and is communicated in the pipeline in pilot chamber. This application has the effect of high-efficient pressure release.

Description

Stacked three-way pilot control pressure reducing valve

Technical Field

The application relates to the field of valves, in particular to a stacked three-way pilot control pressure reducing valve.

Background

The pilot-operated pressure reducing valve adopts the opening degree of an opening and closing part in a control valve body to adjust the flow of a medium, reduces the pressure of the medium, adjusts the opening degree of the opening and closing part by means of the action of the pressure behind the valve, keeps the pressure behind the valve within a certain range, keeps the pressure at an outlet within a set range under the condition that the pressure at the inlet is continuously changed, and protects the subsequent life production appliances.

The existing Chinese patent with reference publication number CN206320311U discloses a pressure reducing valve, which comprises an internal fixed valve tube, an external fixed valve tube, an internal movable valve tube, an external movable valve tube and a block, wherein a first end of the external fixed valve tube is fixedly connected with an exhaust hole on a vacuum cavity, the internal fixed valve tube is fixedly arranged in the external fixed valve tube, a first end of the external movable valve tube is fixedly connected with a second end of the external fixed valve tube through a bearing, a first end of the internal movable valve tube is arranged inside the second end of the internal fixed valve tube, a second end of the internal movable valve tube is arranged inside the external movable valve tube, the block is arranged in the second end of the external fixed valve tube, the block is fixedly connected with the outer wall of the middle part of the internal movable valve tube, and the second end of the internal movable valve tube is fixedly connected with the inner wall of the external movable valve tube through a driving device.

In view of the above-mentioned related art, the inventors consider that there is a defect that the pressure relief efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect of low pressure relief efficiency, the application provides a stacked three-way pilot control pressure relief valve.

The application provides a stack formula tee bend pilot control relief pressure valve adopts following technical scheme:

a stacked three-way pilot control pressure reducing valve comprises a main valve, wherein a slide way is arranged in the main valve, a valve core is connected in the slide way in a sliding manner, a spring cavity which is communicated with the slide way and is parallel to the slide way is arranged in the main valve, a valve seat is fixed at the position, far away from the slide way, of the spring cavity, and a through hole is formed in the valve seat; a return spring is arranged in the spring cavity, one end of the return spring is fixed with the valve seat, and the other end of the return spring is fixed with the end head of the valve core; the bottom of the main valve is provided with an oil inlet communicated with the slideway, the top of the main valve is provided with an oil outlet communicated with the slideway, the end of the valve core is provided with a transverse oil duct, one end of the transverse oil duct is communicated with the spring cavity, the circumferential side wall of the valve core is provided with a vertical oil duct, the top end of the vertical oil duct is communicated with the oil outlet, the lower end of the vertical oil duct is communicated with the oil inlet, and the circumferential side wall of the valve core is attached to the inner wall of the slideway; the lateral wall that the main valve is close to the disk seat is fixed with the pilot valve, has the proportion electro-magnet on the pilot valve, and the pilot valve is inside to be seted up and to be communicated in the pilot chamber of through-hole, and the intracavity of pilot slides and is connected with the cone valve that is used for sealing and opening the through-hole, and the main valve surface is seted up and is communicated in the pipeline in pilot chamber.

By adopting the technical scheme, oil enters the vertical oil duct from the oil inlet and is discharged from the oil outlet, the spring cavity is filled with the oil through the horizontal oil duct, when the pressure at the oil outlet reaches a set value, the cone valve slides in the pilot cavity to enable the through hole to be communicated with the pilot cavity, at the moment, the pressure in the spring cavity and the slide way is greater than the pressure in the pilot cavity, the valve core moves towards the pilot cavity, the reset spring compresses to cut off the communication between the oil inlet and the oil outlet, and the oil enters the pilot cavity and flows out through the pipeline to be decompressed; after the pressure of the oil outlet accords with the pressure, the proportional electromagnet pushes the cone valve to close the through hole, the connection between the spring cavity and the pipeline is cut off, the spring cavity and the slide way obtain pressure balance, the reset spring pushes the valve core to slide towards the direction deviating from the guide cavity, and the valve core is communicated with the oil inlet and the oil outlet again to keep the pressure stability of the oil outlet so that the pressure relief of the pressure relief valve is more automatic and efficient.

Optionally, a pressure relief port communicated with the slide way is formed in the top of the main valve, an annular groove communicated with the vertical oil duct is formed in the circumferential side wall of the valve core, and the width of the annular groove is larger than the shortest distance between the pressure relief port in the inner wall of the slide way and the oil outlet.

Through adopting above-mentioned technical scheme, when the pressure of oil outlet department reached the setting value, the cone valve slided in the guide's intracavity and makes through-hole and guide's chamber intercommunication carry out the pressure release, if the too big setting value that leads to of pressure of oil outlet department for pressure in spring chamber and the slide is far more than the pressure of guide's intracavity, and the case continues to move towards guide's chamber, and oil-out and pressure release mouth communicate each other through the annular groove, carry out the pressure release of oil outlet department, and the pressure stability to oil outlet department has stronger guard action.

Optionally, one end of the slideway far away from the pilot chamber penetrates the main valve and is arranged for an opening, and the opening of the slideway is in threaded connection with a sealing bolt.

By adopting the technical scheme, the valve core can be maintained or replaced more conveniently by unscrewing the sealing bolt.

Optionally, a sealing ring is sleeved on the sealing bolt, and the sealing bolt compresses the sealing ring on the side wall of the main valve.

Through adopting above-mentioned technical scheme, the setting up of sealing washer has improved the leakproofness between sealing bolt and the main valve for the interior oil of slide is difficult for spilling the main valve more.

Optionally, a fixing seat is fixed at one end of the return spring, which is far away from the valve core, the fixing seat is in threaded connection in the through hole, and the through hole penetrates through the fixing seat and then is communicated with the spring cavity.

Through adopting above-mentioned technical scheme, unscrew the fixing base from the disk seat for the maintenance or the change of reset spring and disk seat are more convenient.

Optionally, a plurality of mounting grooves have all been seted up to main valve top and bottom.

Through adopting above-mentioned technical scheme, the setting of mounting groove can make other valves or devices can be more convenient install with the relief pressure valve.

Optionally, two throttles are installed in the horizontal oil duct, and the two throttles are located on two sides of the vertical oil duct respectively.

Through adopting above-mentioned technical scheme, the flow controller can control the logical oil sectional area of oil duct, has reached the effect of adjusting the flow.

Optionally, protective paint is coated on the outer surfaces of the main valve and the pilot valve.

By adopting the technical scheme, the protective paint is also called as common coating, is a coating with a special formula, and is used for protecting equipment or devices from being corroded by the environment, so that the service life of the equipment or devices is prolonged, and the use safety and reliability are ensured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the pressure at the oil outlet reaches a set value, the cone valve slides in the pilot cavity to enable the through hole to be communicated with the pilot cavity, the valve core moves towards the pilot cavity to cut off the communication between the oil inlet and the oil outlet, and the oil enters the pilot cavity and flows out through the pipeline to be decompressed; when the pressure of the oil outlet is consistent, the proportional electromagnet pushes the cone valve to close the through hole, the connection between the spring cavity and the pipeline is cut off, the oil inlet is communicated with the oil outlet again, and the pressure relief of the pressure relief valve is more automatic and efficient;

2. if the pressure at the oil outlet is too high to cause the pressure to exceed a set value, the pressure in the spring cavity and the pressure in the slide way are far larger than the pressure in the pilot cavity, the valve core continues to move towards the pilot cavity, the oil outlet and the pressure relief port are communicated with each other through the annular groove to perform pressure relief at the oil outlet, and a stronger guarantee effect is achieved on the pressure stability at the oil outlet.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present application;

FIG. 2 is an enlarged view of a portion A of FIG. 1 showing a through hole;

fig. 3 is a sectional view showing a piping in the embodiment of the present application.

Description of reference numerals: 1. a main valve; 11. a slideway; 12. a spring cavity; 13. an oil inlet; 14. an oil outlet; 15. a pressure relief port; 16. a pipeline; 2. a valve core; 21. a cross oil passage; 211. a restrictor; 22. a vertical oil duct; 23. an annular groove; 3. a valve seat; 31. a through hole; 4. a return spring; 41. a fixed seat; 5. a pilot valve; 51. a proportional electromagnet; 52. a pilot cavity; 53. a cone valve; 6. a seal bolt; 61. a seal ring; 7. and (4) mounting the groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a stacked three-way pilot control pressure reducing valve.

Referring to fig. 1, the stacked three-way pilot control pressure reducing valve comprises a horizontally arranged main valve 1, a horizontally arranged slide way 11 is arranged in the main valve 1, one end of the slide way 11 is communicated with the outside, the other end of the slide way is communicated with a spring cavity 12, the central line of the spring cavity 12 is collinear with the central line of the slide way 11, one end of the slide way 11 communicated with the outside is in threaded connection with a sealing bolt 6, and a sealing ring 61 is sleeved on the sealing bolt 6; the water level is moved smoothly in the slide 11 and is connected with

case

2, and 2 circumference lateral walls of case and the laminating of slide 11 inner wall, and the diameter of spring chamber 12 is greater than the diameter of

slide

11, and 1 bottom of main valve is seted up and is communicated in the oil inlet 13 of

slide

11, and 1 top of main valve is seted up and is communicated in the oil-out 14 of slide 11.

The end of the valve core 2 far away from the spring cavity 12 is provided with a horizontal oil duct 21 which is horizontally arranged, the end of the horizontal oil duct 21 far away from the sealing bolt 6 is communicated with the spring cavity 12, two throttles 211 are arranged inside the horizontal oil duct 21, the two throttles 211 are respectively positioned at two sides of a vertical oil duct 22, the vertical oil duct 22 which is vertically arranged is arranged on the circumferential side wall of the valve core 2, the top end of the vertical oil duct 22 is communicated with an oil outlet 14, the low end of the vertical oil duct 22 is communicated with an oil inlet 13, a return spring 4 is horizontally arranged in the spring cavity 12, one end of the return spring 4 is fixed with the valve core 2, and the other end of the return spring 4 is connected with a pressure relief system for reducing the pressure at the oil outlet 14.

Oil enters the vertical oil duct 22 from the oil inlet 13 and then flows out of the oil outlet 14, meanwhile, the spring cavity 12 is filled with the oil after passing through the throttler 211 in the horizontal oil duct 21, when the pressure at the oil outlet 14 reaches a set value, the pressure relief system enables the valve core 2 to move towards the inside of the spring cavity 12, the return spring 4 is compressed, the oil outlet 14 is sealed, and the oil in the spring cavity 12 is leaked through the pressure relief system; when the pressure of the oil outlet 14 is matched, the pressure relief system is closed, so that the return spring 4 pushes the valve core 2 towards the direction away from the pilot cavity 52, the oil inlet 13 and the oil outlet 14 are communicated again, and finally the pressure at the oil outlet 14 is kept stable, so that the pressure relief of the pressure relief valve is more automatic and efficient.

Referring to fig. 2 and 3, the pressure relief system includes a pilot valve 5, a proportional electromagnet 51, a cone valve 53 and a valve seat 3, a pilot cavity 52 is horizontally formed in the pilot valve 5, the pilot valve 5 is fixed on a side wall of a main valve 1 close to a spring cavity 12, the valve seat 3 is fixed at a joint of the main valve 1 and the pilot valve 5, a through hole 31 is horizontally formed in the side wall of the valve seat 3, the pilot cavity 52 is communicated with the spring cavity 12 through the through hole 31, a fixing seat 41 is connected to an opening of the through hole 31 close to a valve element 2 by a thread, one end of a return spring 4 far away from the valve element 2 is fixed to the fixing seat 41, the cone valve 53 is connected in the pilot cavity 52 in a horizontal sliding manner and used for closing and opening the through hole 31, a pipeline 16 communicated with the pilot cavity 52 is formed in the top of the main valve 1, and protective paint is coated on outer surfaces of the main valve 1 and the pilot valve 5.

When the pressure in the oil outlet 14 and the spring cavity 12 is too high, the oil in the spring cavity 12 pushes the cone valve 53 open to open the through hole 31, and the pressure in the spring cavity 12 and the slide 11 is higher than the pressure in the pilot cavity 52, so that the valve core 2 moves towards the pilot cavity 52, the return spring 4 compresses to cut off the communication between the oil inlet 13 and the oil outlet 14, and the oil enters the pilot cavity 52 and flows out of the main valve 1 through the pipeline 16 to be decompressed; when the pressure value of the oil outlet 14 is in accordance with the pressure value, the proportional electromagnet 51 pushes the cone valve 53 to close the through hole 31 again, at this time, the spring cavity 12 and the slide way 11 obtain pressure balance, the valve core 2 slides towards the direction departing from the pilot cavity 52, and the oil inlet 13 and the oil outlet 14 are communicated again, so that the pressure reduction at the oil outlet 14 is more automatic and efficient.

Referring back to fig. 1, a pressure relief port 15 communicated with the slide way 11 is formed in the position, close to the oil outlet 14, of the top of the main valve 1, an annular groove 23 communicated with the vertical oil duct 22 is formed in the circumferential side wall of the valve core 2, and the width of the annular groove 23 is larger than the shortest distance between the pressure relief port 15 and the oil outlet 14 in the inner wall of the slide way 11; if the pressure at the oil outlet 14 is too high and exceeds the preset value, the pressure value cannot be reduced to the preset value by the pressure relief system in a short time, the valve core 2 continues to move towards the pilot chamber 52, the oil outlet 14 and the pressure relief port 15 are communicated with each other through the annular groove 23, the pressure relief at the oil outlet 14 is carried out, and the pressure at the oil outlet 14 is further guaranteed to be stable.

The implementation principle of the stacked three-way pilot control reducing valve in the embodiment of the application is as follows: oil enters the vertical oil passage 22 from the oil inlet 13 and flows out from the oil outlet 14, the spring cavity 12 is filled with the oil through the transverse oil passage 21, when the pressure at the oil outlet 14 reaches a set value, the cone valve 53 slides in the pilot cavity 52 to enable the through hole 31 to be communicated with the pilot cavity 52, at the moment, the pressure in the spring cavity 12 and the pressure in the slide way 11 are larger than the pressure in the pilot cavity 52, the valve core 2 moves towards the pilot cavity 52, the return spring 4 compresses to cut off the communication between the oil inlet 13 and the oil outlet 14, and the oil enters the pilot cavity 52 and flows out through the pipeline 16 to be decompressed;

if the pressure at the oil outlet 14 is too high to exceed a set value, so that the pressures in the spring cavity 12 and the slide 11 are far greater than the pressure in the pilot cavity 52, the valve core 2 continues to move towards the pilot cavity 52, and the oil outlet 14 and the pressure relief port 15 are communicated with each other through the annular groove 23 to perform pressure relief at the oil outlet 14;

when the pressure of the oil outlet 14 is matched, the proportional electromagnet 51 pushes the cone valve 53 to close the through hole 31, the connection between the spring cavity 12 and the pipeline 16 is cut off, at the moment, the spring cavity 12 and the slide way 11 obtain pressure balance, the return spring 4 pushes the valve core 2 to slide towards the direction departing from the pilot cavity 52, and the oil inlet 13 and the oil outlet 14 are communicated again to keep the pressure at the oil outlet 14 stable, so that the pressure relief of the pressure relief valve is more automatic and efficient.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a stack formula tee bend pilot control relief pressure valve, includes main valve (1), and slide (11) have been seted up to main valve (1) inside, and slide (11) internal slipping is connected with case (2), its characterized in that: a spring cavity (12) which is communicated with the slideway (11) and is parallel to the slideway (11) is formed in the main valve (1), a valve seat (3) is fixed at the position, far away from the slideway (11), of the spring cavity (12), and a through hole (31) is formed in the valve seat (3); a return spring (4) is arranged in the spring cavity (12), one end of the return spring (4) is fixed with the valve seat (3), and the other end of the return spring is fixed with the end of the valve core (2); an oil inlet (13) communicated with the slide way (11) is formed in the bottom of the main valve (1), an oil outlet (14) communicated with the slide way (11) is formed in the top of the main valve (1), a transverse oil duct (21) is formed in the end of the valve core (2), one end of the transverse oil duct (21) is communicated with the spring cavity (12), a vertical oil duct (22) is formed in the circumferential side wall of the valve core (2), the top end of the vertical oil duct (22) is communicated with the oil outlet (14), the lower end of the vertical oil duct (22) is communicated with the oil inlet (13), and the circumferential side wall of the valve core (2) is attached to the inner wall of the slide way (11); the side wall that main valve (1) is close to disk seat (3) is fixed with pilot valve (5), has proportion electro-magnet (51) on pilot valve (5), and pilot chamber (52) that communicate in through-hole (31) are seted up to pilot valve (5) inside, and pilot chamber (52) internal slipping is connected with and is used for sealing and open cone valve (53) of through-hole (31), and main valve (1) surface is seted up and is communicated in pipeline (16) of pilot chamber (52).

2. A stacked, three-way pilot controlled pressure reducing valve according to claim 1, characterized in that: the top of the main valve (1) is provided with a pressure relief opening (15) communicated with the slide way (11), the circumferential side wall of the valve core (2) is provided with an annular groove (23) communicated with the vertical oil duct (22), and the width of the annular groove (23) is larger than the shortest distance between the pressure relief opening (15) on the inner wall of the slide way (11) and the oil outlet (14).

3. A stacked, three-way pilot controlled pressure reducing valve according to claim 1, characterized in that: one end of the slide way (11) far away from the guide cavity (52) penetrates the main valve (1) and is arranged for an opening, and the opening of the slide way (11) is in threaded connection with a sealing bolt (6).

4. A stacked, three-way pilot controlled pressure reducing valve according to claim 3, characterized in that: the sealing bolt (6) is sleeved with a sealing ring (61), and the sealing bolt (6) compresses the sealing ring (61) on the side wall of the main valve (1).

5. A stacked, three-way pilot controlled pressure reducing valve according to claim 1, characterized in that: and a fixed seat (41) is fixed at one end of the return spring (4) far away from the valve core (2), the fixed seat (41) is in threaded connection in the through hole (31), and the through hole (31) penetrates through the fixed seat (41) and then is communicated with the spring cavity (12).

6. A stacked, three-way pilot controlled pressure reducing valve according to claim 1, characterized in that: a plurality of mounting grooves (7) are all seted up to main valve (1) top and bottom.

7. A stacked, three-way pilot controlled pressure reducing valve according to claim 1, characterized in that: two throttles (211) are installed in the transverse oil duct (21), and the two throttles (211) are respectively located on two sides of the vertical oil duct (22).

8. A stacked, three-way pilot controlled pressure reducing valve according to claim 1, characterized in that: and protective paint is coated on the outer surfaces of the main valve (1) and the pilot valve (5).