CN210318684U

CN210318684U - Pilot-operated type pressure regulating valve

Info

Publication number: CN210318684U
Application number: CN201921233395.4U
Authority: CN
Inventors: 李先明; 谢雄; 李光明; 熊文丰; 邹晓波
Original assignee: Zhejiang Huizheng Automatic Control Valve Co ltd
Current assignee: Huizheng automatic control valve group Co., Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-14
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a pilot-operated pressure regulating valve, which comprises a first outer cavity, a flow regulating valve and a communicating valve, wherein a first air chamber is arranged in the first outer cavity, a shell is fixed at the top of the first outer cavity, a positioning rod is arranged in the middle of the first outer cavity and the shell in a penetrating way, a connecting piece is arranged in the center of the bottom of the first outer cavity in a penetrating way, an elastic circulating pipe is arranged in the middle of the connecting piece, the outer walls of the connecting piece at the upper side and the lower side of the elastic circulating pipe are respectively connected with the flow regulating valve and the communicating valve through a first communicating pipe, a second air chamber is arranged in the second outer cavity, an outer pipe is arranged in the bottom of the second outer cavity in a penetrating way, and a valve core is arranged in the outer pipe, the pilot-operated pressure regulating valve can effectively improve the fluid regulating control precision of the regulating, the practicality of the regulating valve is effectively improved, and the use obstacle caused by the problems of pressure and sealing performance is avoided.

Description

Pilot-operated type pressure regulating valve

Technical Field

The utility model relates to a pressure regulating valve technical field specifically is a guide's formula pressure regulating valve.

Background

The pressure regulating valve is simple and convenient flow regulation control equipment, can be directly perceived effectual when using and carry out the control of fluid circulation between the valve body, effectively eliminate and avoid the flow circulation deviation that pressure fluctuation scheduling problem caused for system's pressure can effectively maintain the invariant of settlement flow when receiving the change, avoids appearing the distribution problem of flow, makes the flow regulation in the pipe network out of control, because of the transport of water conservancy takes place the imbalance because of pressure problem, influences the regulation distribution of flow.

However, the existing pressure regulating valve has the following problems when in use:

pressure regulating valve is using to adjust the precision and injects the problem big, makes its work adjust the precision not high, simultaneously because of its adjustable ratio is not high when adjusting the operation and going on, causes the regulation of equipment along with pressure problem's reason easily and uses out of control, influences normal regulation work and goes on, and equipment's leakproofness effect is not strong simultaneously, and when using for a long time, the position department of its inner structure connection appears fluidic use easily and leaks, influences pressure regulation and control precision and validity. In order to solve the problems, innovative design is urgently needed on the basis of the original pressure regulating valve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guide's formula pressure regulating valve, it is big to solve above-mentioned background art and propose current pressure regulating valve and use the regulation precision to inject the problem, it is not high to make its work adjust the precision, simultaneously when adjusting the operation and go on because of its adjustable ratio is not high, cause the regulation of equipment to use out of control along with pressure problem's reason easily, it goes on to influence normal regulation work, the leakproofness effect of equipment is not strong simultaneously, when using for a long time, its inner structure connects's position department, fluidic use leaks appears easily, influence the problem of pressure regulation and control precision and validity.

In order to achieve the above object, the utility model provides a following technical scheme: a pilot-operated pressure regulating valve comprises a first outer cavity, a flow regulating valve and a communicating valve, wherein a first air chamber is arranged inside the first outer cavity, a first elastic separation belt is fixed in the middle of the first outer cavity, first pressure bearing discs are arranged at the top and the bottom of the first elastic separation belt, a shell is fixed at the top of the first outer cavity, a positioning rod penetrates through the middle of the first outer cavity and the middle of the shell, a first elastic piece is arranged between the positioning rod and the shell, a sealing ring is sleeved at the penetrating connection position of the shell and the first elastic piece, a pressure taking opening is arranged at the edge of the top of the first outer cavity, a connecting piece penetrates through the center of the bottom of the first outer cavity, a positioning block is arranged at the bottom of the penetrating connection position of the positioning rod of the connecting piece, a valve rod is fixed at the lower end of the positioning rod, and an elastic flow pipe is arranged, the outer walls of the connecting pieces on the upper side and the lower side of the elastic circulating pipe are respectively connected with a flow regulating valve and a communicating valve through a first communicating pipe, the bottom of the connecting piece is fixed with a second outer cavity, a pressure bearing block is arranged between the bottom of the connecting piece and the top of the second outer cavity, a second air chamber is arranged in the second outer cavity, a second elastic separation belt is arranged in the middle of the second air chamber, a second bearing disc is fixed at the top of the second elastic separation belt, a second elastic piece is fixed between the second bearing disc and the pressure bearing block, an outer pipe is arranged at the bottom of the second outer cavity in a penetrating way, a valve core is arranged in the outer pipe, the upper end of the valve core is fixed at the bottom of the second bearing disc, the flow regulating valve is mutually connected with the inside of the second air chamber through the second communicating pipe, and the inside of the second air chamber is mutually connected with the, and the valve of the valve body is connected with the communicating valve through a fourth communicating pipe, the middle part of the valve body is positioned under the valve core, and meanwhile, the lower end of the valve core is fixed with a plugging piece.

Preferably, the first pressure bearing discs are symmetrically arranged about a transverse central axis of the first elastic separation belt, the first pressure bearing discs and the first elastic separation belt are fixedly connected to form an integrated structure, and the first pressure bearing discs are arranged in the first outer cavity in a lifting motion mode.

Preferably, the positioning block is fixedly welded at the bottom of the positioning rod, the positioning block is arranged in an inverted U-shaped structure, and the inner wall of the positioning block and the outer wall of the top of the connecting piece form a jointed sliding connection structure.

Preferably, the elastic flow pipe is vertically and coaxially arranged with the connecting piece and the valve rod, the inner diameter of the elastic flow pipe is smaller than the maximum outer diameter of the section of the valve rod, and the end part of the valve rod is arranged to be in a conical structure.

Preferably, the area of the second elastic dividing strip is larger than the maximum area of the section of the middle part of the second outer cavity, the sealing structure at the joint of the second elastic dividing strip and the second outer cavity is arranged, and the middle part of the second elastic dividing strip and the end part of the valve core are arranged in a penetrating sealing structure.

Preferably, the second is accepted the side cross-section of dish and is set up to "U" style of calligraphy structure, and the second is accepted dish and second elastic component fixed connection to the second is accepted dish and bearing block and all constitutes elevation structure with the second outer chamber, and the side cross-section of bearing block sets up to "T" font structure of inversion moreover, the outer wall of bearing block sets up the sliding connection of laminating with the inner wall of connecting piece, and embedded installation has O shape sealing ring on the outer wall of bearing block.

Preferably, the outer tube is provided with a hollow structure, and the outer tube, the second air chamber and the third communicating tube are communicated with each other.

Preferably, the rear part and the front part of the valve core are communicated with the inside of the second communicating pipe and the inside of the third communicating pipe respectively, and a joint and sealed relative lifting structure is arranged between the middle part of the valve core and the plugging piece.

Compared with the prior art, the beneficial effects of the utility model are that: the pilot-operated pressure regulating valve can effectively improve the fluid regulating control precision of the regulating valve, has large adjustable ratio of pressure when in use and good sealing property, effectively improves the practicability of the regulating valve, and avoids the use obstacle caused by the problems of pressure and sealing property;

1. through the arrangement of the elastic pieces in the first air chamber and the second outer chamber, when the pressure value of the pressure taking port is larger than or smaller than a set pressure value, the position of the valve rod is changed, the valve rod is connected with the elastic circulation pipe, the opening or blocking state of the elastic circulation pipe is changed, the circulation of a fluid medium is changed when the elastic circulation pipe is opened or blocked, the position of the valve core is moved, the circulation of the valve body is changed, and the pressure before and after the valve of the valve body is controlled;

2. the arrangement of the first elastic separation belt and the second elastic separation belt facilitates the installation and positioning of the first pressure bearing disc and the second bearing disc in the first air chamber and the second air chamber, so that the first pressure bearing disc and the second bearing disc are more smoothly and conveniently moved when the positions of the control valve rod and the valve core are moved, and meanwhile, the elastic separation belt is used, so that the installation sealing performance in the air chamber is stronger, and the leakage problem of fluid media generated in the long-term use process is avoided.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the internal structure of the first air chamber of the present invention;

FIG. 3 is a schematic view of the internal structure of the second air chamber of the present invention;

fig. 4 is a schematic view of a connection structure of the outer tube and the third communicating tube of the present invention;

fig. 5 is a schematic view of the valve body structure of the present invention.

In the figure: 1. a first outer chamber; 2. a first air chamber; 3. a first elastic dividing strip; 4. a first pressure bearing disk; 5. a housing; 6. positioning a rod; 7. a first elastic member; 8. sealing the ring; 9. a pressure taking port; 10. a connecting member; 11. positioning blocks; 12. a valve stem; 13. an elastic flow tube; 14. a first communication pipe; 15. a flow regulating valve; 16. a communication valve; 17. a second outer chamber; 18. a pressure-bearing block; 19. a second air chamber; 20. a second elastic dividing strip; 21. a second tray; 22. a second elastic member; 23. an outer tube; 24. a valve core; 25. a second communicating pipe; 26. a third communicating pipe; 27. a valve body; 28. a fourth communicating pipe; 29. a closure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a pilot-operated pressure regulating valve comprises a first outer cavity 1, a first air chamber 2, a first elastic separation belt 3, a first pressure bearing disc 4, a shell 5, a positioning rod 6, a first elastic piece 7, a sealing ring 8, a pressure taking port 9, a connecting piece 10, a positioning block 11, a valve rod 12, an elastic flow pipe 13, a first communicating pipe 14, a flow regulating valve 15, a communicating valve 16, a second outer cavity 17, a pressure bearing block 18, a second air chamber 19, a second elastic separation belt 20, a second receiving disc 21, a second elastic piece 22, an outer pipe 23, a valve core 24, a second communicating pipe 25, a third communicating pipe 26, a valve body 27, a fourth communicating pipe 28 and a blocking piece 29, wherein the first air chamber 2 is arranged inside the first outer cavity 1, the first elastic separation belt 3 is fixed in the middle of the first outer cavity 1, the first elastic separation belt 4 is arranged at the top and the bottom of the first elastic separation belt 3, the shell 5 is fixed at the top of the first outer cavity 1, a positioning rod 6 is installed in the middle of the first outer cavity 1 and the shell 5 in a penetrating manner, a first elastic piece 7 is arranged between the positioning rod 6 and the shell 5, a sealing ring 8 is sleeved at the penetrating joint of the shell 5 and the first elastic piece 7, a pressure taking port 9 is arranged at the edge of the top of the first outer cavity 1, a connecting piece 10 is installed in the center of the bottom of the first outer cavity 1 in a penetrating manner, a positioning block 11 is arranged at the bottom of the penetrating joint of the positioning rod 6 of the connecting piece 10, a valve rod 12 is fixed at the lower end of the positioning rod 6, an elastic flow pipe 13 is arranged in the middle of the connecting piece 10, the outer walls of the connecting piece 10 at the upper side and the lower side of the elastic flow pipe 13 are respectively connected with a flow regulating valve 15 and a communication valve 16 through a first communication pipe 14, a second outer cavity 17 is fixed at the bottom of, a second air chamber 19 is opened in the second outer chamber 17, a second elastic dividing strip 20 is arranged in the middle of the second air chamber 19, a second receiving disc 21 is fixed on the top of the second elastic dividing strip 20, a second elastic member 22 is fixed between the second receiving disc 21 and the pressure-bearing block 18, an outer tube 23 is mounted at the bottom of the second outer chamber 17 in a penetrating manner, a valve core 24 is arranged in the outer tube 23, the upper end of the valve core 24 is fixed on the bottom of the second receiving disc 21, the flow regulating valve 15 is connected with the inside of the second air chamber 19 through a second communicating tube 25, the inside of the second air chamber 19 is connected with the valve back of the valve body 27 through the outer tube 23 and a third communicating tube 26, the valve front of the valve body 27 is connected with the communicating valve 16 through a fourth communicating tube 28, the middle of the valve body 27 is located right below the valve core 24, and a blocking member 29 is fixed on the lower end of the valve core.

First pressure bearing dish 4 sets up about the horizontal center axis symmetry of first elastic separation area 3, and first pressure bearing dish 4 sets up with first elastic separation area 3 is fixed connection's integrated structure, and first pressure bearing dish 4 sets up at the inside elevating movement of first exocoel 1, locating piece 11 fixed welding is in the bottom of locating lever 6, and locating piece 11 sets up to "U" font structure of inversion, and the inner wall of locating piece 11 constitutes the sliding connection structure of laminating with the top outer wall of connecting piece 10, make first pressure bearing dish 4 when receiving first exocoel 1 pressure variation, elevating movement is more smooth, thereby change the position of first pressure bearing dish 4 and valve rod 12.

Elastic flow tube 13 and vertical coaxial setting of connecting piece 10 and valve rod 12, and elastic flow tube 13's internal diameter is less than the biggest external diameter of valve rod 12's cross-section, and the tip of valve rod 12 sets up to coniform structure for valve rod 12 can well control opening and the shutoff of elastic flow tube 13 at the in-process of motion, and it is square effectively to change fluidic circulation through elastic flow tube 13's circulation, carries out flow control.

The area of the second elastic dividing strip 20 is larger than the maximum area of the section of the middle part of the second outer cavity 17, the sealing structure at the joint of the second elastic dividing strip 20 and the second outer cavity 17 is arranged, the sealing structure at the middle part of the second elastic dividing strip 20 and the end part of the valve core 24 is arranged in a penetrating way, the side section of the second bearing disc 21 is arranged in a U-shaped structure, the second bearing disc 21 is fixedly connected with the second elastic part 22, the second bearing disc 21 and the bearing block 18 and the second outer cavity 17 form a lifting structure, the side section of the bearing block 18 is arranged in an inverted T-shaped structure, the outer wall of the bearing block 18 and the inner wall of the connecting part 10 are arranged in a jointed sliding connection, and an O-shaped sealing ring is embedded on the outer wall of the bearing block 18, so that the lifting positions of the bearing block 18 and the second bearing disc 21 can be conveniently moved and changed, and the position of the valve core, while avoiding pressure changes due to leaks inside the second outer chamber 17.

The outer pipe 23 is of a hollow structure, the outer pipe 23, the second air chamber 19 and the third communicating pipe 26 are communicated with each other, the rear part and the front part of the valve core 24 are communicated with each other between the second communicating pipe 25 and the third communicating pipe 26, and the middle part of the valve core 24 and the plugging piece 29 are of a relative lifting structure which is sealed in a fitting manner, so that the position movement of the valve core 24 can be changed conveniently in the lifting movement, and the valve body 27 can be communicated and plugged by using the valve core 24.

The working principle is as follows: when the pilot-operated pressure regulating valve is used, firstly, according to fig. 1-5, the pressure taking port 9 is used for selecting the pressure behind the valve body 27, so that when the problem of the internal pressure value of the valve body 27 affects the fluid flow circulation, the set pressure in the working process of the pressure taking port 9 is changed, as shown in fig. 1-3, after the pressure behind the valve body 27 selected by the pressure taking port 9 is greater than the set value, the first elastic member 7 is elastically deformed by pressure, the first elastic separation belt 3 in the first air chamber 2 drives the first pressure bearing disc 4 to move, so that the first elastic member 7 is movably deformed, so that the positioning rod 6 drives the valve rod 12 at the lower end thereof to move downwards, under the extrusion connection action of the valve rod 12 and the elastic circulation pipe 13, the fluid medium in front of the valve body 27 introduced by the communication valve 16 is cut off in the elastic circulation pipe 13, so that the fluid medium introduced by the communication valve 16 into the connecting piece 10 exerts acting force on the, the pressure bearing block 18 extrudes the second elastic part 22 to deform, the second elastic separation belt 20 and the second bearing disc 21 drive the valve core 24 to move downwards under the action of the second elastic part 22, as shown in fig. 5, under the action of cutting off the middle part of the valve body 27 under the action of the plugging part 29 at the end part of the valve core 24, fluid media are prevented from flowing into the valve through the middle part of the valve body 27, and the purpose of stabilizing the pressure behind the valve is achieved;

as shown in fig. 1-5, when the pressure of the pressure taking port 9 is smaller than the set pressure value, the first elastic member 7 is elastically deformed, the positioning rod 6 drives the valve rod 12 at the lower end of the positioning rod to move upwards, so that the fluid front medium flows into the first communication pipe 14 and the flow regulating valve 15 through the elastic communication pipe 13, and the valve core 24 drives the blocking member 29 to move upwards at this time, so that the middle part of the valve body 27 is opened, and the fluid medium is supplied to the rear of the valve to stabilize the pressure behind the valve.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A pilot-operated pressure regulating valve comprising a first outer chamber (1), a flow regulating valve (15) and a communicating valve (16), characterized in that: a first air chamber (2) is arranged in the first outer cavity (1), a first elastic separation band (3) is fixed in the middle of the first outer cavity (1), first pressure bearing discs (4) are arranged at the top and the bottom of the first elastic separation band (3), a shell (5) is fixed at the top of the first outer cavity (1), a positioning rod (6) is arranged in the middle of the first outer cavity (1) and the shell (5) in a penetrating mode, a first elastic piece (7) is arranged between the positioning rod (6) and the shell (5), a sealing ring (8) is sleeved at the penetrating connection position of the shell (5) and the first elastic piece (7), a pressure taking opening (9) is formed in the edge of the top of the first outer cavity (1), a connecting piece (10) is arranged at the center of the bottom of the first outer cavity (1) in a penetrating mode, and a positioning block (11) is arranged at the bottom of the penetrating connection position of the positioning rod (6) of the connecting piece (, a valve rod (12) is fixed at the lower end of the positioning rod (6), an elastic flow pipe (13) is arranged in the middle of the connecting piece (10), the outer walls of the connecting piece (10) on the upper side and the lower side of the elastic flow pipe (13) are respectively connected with a flow regulating valve (15) and a communication valve (16) through a first communication pipe (14), a second outer cavity (17) is fixed at the bottom of the connecting piece (10), a pressure bearing block (18) is arranged between the bottom of the connecting piece (10) and the top of the second outer cavity (17), a second air chamber (19) is arranged in the second outer cavity (17), a second elastic separation belt (20) is arranged in the middle of the second air chamber (19), a second bearing disc (21) is fixed at the top of the second elastic separation belt (20), and a second elastic piece (22) is fixed between the second bearing disc (21) and the pressure bearing block (18), an outer pipe (23) penetrates through the bottom of the second outer cavity (17), a valve core (24) is arranged in the outer pipe (23), the upper end of the valve core (24) is fixed to the bottom of the second bearing disc (21), the flow regulating valve (15) is connected with the inside of the second air chamber (19) through a second communicating pipe (25), the inside of the second air chamber (19) is connected with the rear portion of the valve body (27) through the outer pipe (23) and a third communicating pipe (26), the front portion of the valve body (27) is connected with the communicating valve (16) through a fourth communicating pipe (28), the middle portion of the valve body (27) is located under the valve core (24), and meanwhile a blocking piece (29) is fixed to the lower end of the valve core (24).

2. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the first pressure bearing discs (4) are symmetrically arranged relative to the transverse central axis of the first elastic separation belt (3), the first pressure bearing discs (4) and the first elastic separation belt (3) are fixedly connected into an integrated structure, and the first pressure bearing discs (4) are arranged in the first outer cavity (1) in a lifting motion mode.

3. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the positioning block (11) is fixedly welded at the bottom of the positioning rod (6), the positioning block (11) is arranged to be an inverted U-shaped structure, and the inner wall of the positioning block (11) and the outer wall of the top of the connecting piece (10) form a jointed sliding connection structure.

4. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the elastic circulation pipe (13) is vertically and coaxially arranged with the connecting piece (10) and the valve rod (12), the inner diameter of the elastic circulation pipe (13) is smaller than the maximum outer diameter of the cross section of the valve rod (12), and the end part of the valve rod (12) is in a conical structure.

5. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the area of the second elastic separating belt (20) is larger than the maximum area of the section of the middle part of the second outer cavity (17), the sealing structure is arranged at the joint of the second elastic separating belt (20) and the second outer cavity (17), and the sealing structure is arranged between the middle part of the second elastic separating belt (20) and the end part of the valve core (24) in a penetrating manner.

6. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the side cross-section that the second was accepted dish (21) sets up to "U" style of calligraphy structure, and the second is accepted dish (21) and second elastic component (22) fixed connection, and the second is accepted dish (21) and bearing block (18) and all constitutes elevation structure with second outer chamber (17), and the side cross-section of bearing block (18) sets up to "T" font structure of invering, the outer wall of bearing block (18) sets up the sliding connection who sets up to the laminating with the inner wall of connecting piece (10), and embedded O shape sealing ring of installing on the outer wall of bearing block (18).

7. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the outer pipe (23) is of a hollow structure, and the outer pipe (23), the second air chamber (19) and the third communicating pipe (26) are communicated with each other.

8. A pilot operated pressure regulator valve in accordance with claim 1, wherein: the rear part and the front part of the valve core (24) are respectively communicated with the inside of the second communicating pipe (25) and the inside of the third communicating pipe (26), and a relative lifting structure for jointing and sealing is arranged between the middle part of the valve core (24) and the plugging piece (29).