CN215059580U

CN215059580U - Pilot-operated high-pressure regulating valve

Info

Publication number: CN215059580U
Application number: CN202121109517.6U
Authority: CN
Inventors: 彭进
Original assignee: Chongqing Nanping Automation Instrument Factory Co ltd
Current assignee: Chongqing Nanping Automation Instrument Factory Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-12-07
Anticipated expiration: 2031-05-21

Abstract

The utility model belongs to the technical field of high-pressure regulating valves, in particular to a pilot-operated high-pressure regulating valve, which comprises a valve body, a valve seat, a sleeve and a valve core assembly; a main valve cavity is arranged in the valve body, the valve seat and the sleeve are arranged in the main valve cavity, the valve seat is arranged at one end of the sleeve, a water through hole is formed in the side wall of the sleeve, and the water inlet hole is communicated with a water inlet of the valve body; the valve core assembly comprises a pilot valve core and a piston valve core, and the piston valve core is slidably arranged in the sleeve and is in clearance fit with the sleeve; the center of the piston type valve core is provided with a pilot hole, the pilot hole is communicated with the other end of the sleeve, and the end part of the pilot valve core can be in sealing fit with the hole edge of the pilot hole. The problems of poor sealing effect and high thrust execution requirement in the prior art are solved, and the execution force required in the opening and closing process of the high-pressure regulating valve is reduced; meanwhile, the piston type valve core can be compressed by high water pressure, so that the sealing effect is improved.

Description

Pilot-operated high-pressure regulating valve

Technical Field

The utility model belongs to the technical field of high pressure regulating valve, concretely relates to guide's formula high pressure regulating valve.

Background

The regulating valve is also called a control valve, plays an important role in the automatic control of modern factories, and can automatically control the opening of the valve according to a regulating part signal so as to achieve the regulation of medium flow, pressure and liquid level. The regulating valve is divided into an electric regulating valve, a pneumatic regulating valve, a hydraulic regulating valve and the like.

The regulating valve consists of an electric actuating mechanism or a pneumatic actuating mechanism and a regulating valve. The regulating valve is generally divided into a straight-through single-seat regulating valve and a straight-through double-seat regulating valve, and the straight-through double-seat regulating valve has the characteristics of large flow capacity, small unbalance and stable operation, so the straight-through double-seat regulating valve is particularly suitable for occasions with large flow, high pressure drop and less leakage. The production of these plants depends on the correct distribution and control of the flowing medium. These controls, whether energy exchange, pressure reduction, or simple vessel charging, require some final control element to accomplish.

The existing regulating valve, whether imported or a domestic imitated high-pressure bypass valve, generally has the problem of internal leakage, so that the valve is frequently overhauled and quickly internally leaked, and the valve is almost always in an internal leakage state in the whole using process, so that the safe operation of a unit is ensured, the overhauling workload is large, the operation cost is high, and great potential safety hazards exist; in addition, the high-temperature and high-pressure regulating valve often generates large noise during regulation, and mainly aims to bear the pressure generated by large water pressure difference when an operating mechanism is opened and closed; all pressures are placed in the valve at the bottom, and when the valve is opened and closed, the valve is opened and closed by applying larger force, and the conventional high-pressure regulating valve has the problems of easy leakage, poor regulating performance under high temperature and high pressure difference, opening and closing by using large thrust and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve prior art's high pressure regulating valve and have the problem that sealed effect is not good, need the execution of high thrust, this scheme provides a guide's formula high pressure regulating valve, can open in advance through with the pilot valve core, then drive the mode that piston case opened, reduce the required execution power of high pressure regulating valve switching in-process, simultaneously, and when the governing valve was turn-offed, utilize high water pressure to compress tightly piston case, thereby improve sealed effect.

The utility model discloses the technical scheme who adopts does:

a pilot-operated high-pressure regulating valve comprises a valve body, a valve seat, a sleeve and a valve core assembly; a main valve cavity is arranged in the valve body, the valve seat and the sleeve are arranged in the main valve cavity, the valve seat is arranged at one end of the sleeve, a water through hole is formed in the side wall of the sleeve, and the water inlet hole is communicated with a water inlet of the valve body; the valve core assembly comprises a pilot valve core and a piston valve core, and the piston valve core is slidably arranged in the sleeve and is in clearance fit with the sleeve; the piston type valve core can be in sealing fit with the valve seat; the center of the piston type valve core is provided with a pilot hole, the pilot hole is communicated with the other end of the sleeve, one end of the pilot valve core is arranged in the piston type valve core and can drive the piston type valve core to move, and the end part of the pilot valve core can be in sealing fit with the hole edge of the pilot hole.

Optionally: the valve core assembly further comprises a linkage ring, the linkage ring is slidably sleeved outside the pilot valve core and fixedly connected with the piston type valve core, a plurality of back side holes are uniformly distributed in the linkage ring, and the back side holes are communicated with the pilot holes.

Optionally: a pilot valve cavity is arranged in the piston type valve core and is communicated with the back side hole and the pilot hole, and a ball head part is arranged at the end part of the pilot valve core and can be in sealing fit with the hole edge of the pilot hole.

Optionally: the pilot valve core is provided with a disc part close to the ball head part, and a return spring in a compressed state is arranged between the disc part and the bottom wall of the pilot valve cavity.

Optionally: the valve seat is in a cylindrical shape with a bottom, and a plurality of through holes are formed in the bottom of the valve seat.

Optionally: the water outlet and the water inlet of the valve body are communicated with the main valve cavity, and the water outlet and the water inlet are arranged in a staggered mode.

Optionally: the valve body is connected with an upper cover, an operating rod is arranged in the upper cover, one end of the operating rod is connected with the pilot valve core, and the other end of the operating rod extends out of the upper cover.

Optionally: a guide bush is sleeved outside the guide valve core and fixed on the upper cover.

Optionally: and a filling sealing piece is arranged between the operating rod and the upper cover, the filling sealing piece is tubular and is used for sealing a gap between the operating rod and the upper cover, a top cover is connected to the upper cover, and the top cover is used for abutting against the end of the filling sealing piece.

Optionally: the upper cover is of an inverted T-shaped structure and is detachably connected with the valve body through bolts.

The utility model has the advantages that:

1. in the scheme, the problems of poor sealing effect and high thrust requirement in the prior art can be solved, and the execution force required in the opening and closing process of the high-pressure regulating valve is reduced by opening the pilot valve core in advance and then driving the piston type valve core to open;

2. in addition, when the high-pressure regulating valve in the scheme is in a turn-off state, the piston type valve element can be compressed by high water pressure, and therefore the sealing effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a pilot-operated high-pressure regulating valve in the scheme;

fig. 2 is a schematic structural diagram of the valve core assembly in the scheme.

In the figure: 1-an operating lever; 2-a top cover; 3-filling the seal; 4, covering the upper cover; 5-a pilot valve core; 6-a linkage ring; 7-piston type valve core; 8-a return spring; 9-water outlet; 10-a water inlet; 11-a valve body; 12-a guide bushing; 13-a valve seat; 14-a disk; 15-pilot hole; 16-a ball head; 17-a sleeve; 18-a backside hole; 19-main valve chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 and 2, the present embodiment designs a pilot-operated high-pressure regulating valve, which includes a valve body 11, a valve seat 13, a sleeve 17, a valve core assembly, and the like.

A main valve cavity 19 is arranged in a valve body 11, the main valve cavity 19 is vertically arranged in a cylindrical or tower shape, a water inlet 10 and a water outlet 9 are arranged on the valve body 11, the upper portion of the main valve cavity 19 is communicated with the water inlet 10, the lower portion of the main valve cavity 19 is communicated with the water outlet 9, the water inlet 10 and the water outlet 9 are both in inclined hole shapes, and the water outlet 9 and the water inlet 10 are arranged in a staggered mode.

The valve seat 13 and the sleeve 17 are both arranged in the main valve cavity 19, the valve seat 13 is arranged at the lower end of the sleeve 17, the valve seat 13 is coaxially arranged and connected with the sleeve 17, the valve seat 13 is in a cylindrical shape with a bottom, a plurality of through holes are arranged at the bottom of the valve seat 13, and the through holes are communicated with the water outlet 9.

The valve core assembly is arranged in the sleeve 17 in a sliding mode, and a water through hole is formed in the side wall of the sleeve 17 and is opposite to and communicated with the water inlet 10 of the valve body 11.

The valve core assembly comprises a pilot valve core 5 and a piston valve core 7, the piston valve core 7 is slidably arranged in a sleeve 17, the piston valve core 7 is in clearance fit with the sleeve 17, the piston valve core 7 is used for being in sealing fit with a valve seat 13 and further used for blocking a first water flow channel, the first water flow channel comprises a water through hole, a clearance between the sleeve 17 and the piston valve core 7 and a water flow channel formed by the clearance between the piston valve core 7 and the valve seat 13, and the water flow direction of the first water flow channel flows to a water outlet 9 of the valve body 11 after flowing through the valve seat 13 from the water through hole.

The center of the piston type valve core 7 is provided with a pilot hole 15, one end of the pilot valve core 5 is arranged in the piston type valve core 7 and can drive the piston type valve core 7 to move, the pilot valve core 5 can move relative to the piston type valve core 7, the lower end part of the pilot valve core 5 can be matched with the hole of the pilot hole 15 to seal a second water flow channel, the second water flow channel comprises a water through hole, a gap between the sleeve 17 and the piston type valve core 7, a pilot valve cavity positioned in the piston type valve core 7 and the pilot hole 15, and the water flow direction of the second water flow channel flows from the water through hole, the other end position of the sleeve 17 and the position of the pilot hole 15 successively and flows to the water outlet 9 of the valve body 11.

Example 2

As shown in fig. 1 and 2, the present embodiment designs a pilot-operated high-pressure regulating valve, which includes a valve body 11, a valve seat 13, a sleeve 17 and a valve core assembly.

A main valve cavity 19 is arranged in the valve body 11, the valve seat 13 and the sleeve 17 are both arranged in the main valve cavity 19, the valve seat 13 is arranged at one end of the sleeve 17, a water through hole is arranged on the side wall of the sleeve 17, and the water inlet hole is communicated with the water inlet 10 of the valve body 11; .

The valve core assembly comprises a pilot valve core 5, a piston valve core 7 and a linkage ring 6, wherein the piston valve core 7 is slidably arranged in the sleeve 17 and is in clearance fit with the sleeve; the piston type valve core 7 can be matched with the valve seat 13 to block a first water flow channel, and the first water flow channel flows through the valve seat 13 from the water through hole and flows to the water outlet 9 of the valve body 11. The linkage ring 6 is slidably sleeved outside the pilot valve core 5 and fixedly connected with the piston type valve core 7, a plurality of back side holes 18 are uniformly distributed on the linkage ring 6, the back side holes 18 are communicated with the pilot holes, and a pilot valve cavity is arranged in the piston type valve core 7.

The end part of the pilot valve core 5 is provided with a ball head part 16, the part of the pilot valve core 5 close to the ball head part 16 is provided with a disc part 14, the ball head part 16 can be matched with the hole edge of the pilot hole 15 in a sealing way, and a return spring 8 in a compressed state is arranged between the disc part 14 and the bottom wall of the pilot valve cavity.

The center of the piston type valve core 7 is provided with a pilot hole 15, the pilot valve cavity is communicated with the back side hole 18 and the pilot hole 15, one end of the pilot valve core 5 is arranged in the piston type valve core 7 and can drive the piston type valve core 7 to move, the end part of the pilot valve core 5 can be matched with the hole edge of the pilot hole 15 to seal a second water flow channel, and the second water flow channel is a water flow channel which flows through the other end of the sleeve 17 and the pilot hole 15 from the water through hole in sequence.

An upper cover 4 is connected to the valve body 11, an operating rod 1 is arranged in the upper cover 4, one end of the operating rod 1 is connected with a pilot valve core 5, and the other end of the operating rod 1 extends out of the upper cover 4. A guide bush 12 is arranged around the guide valve slide 5, which guide bush 12 is fastened to the upper cover 4. The upper cover 4 is of an inverted T-shaped structure, and the upper cover 4 is detachably connected with the valve body 11 through bolts. A filling sealing piece 3 is arranged between the operating rod 1 and the upper cover 4, the filling sealing piece 3 is tubular and is used for sealing a gap between the operating rod 1 and the upper cover 4, a top cover 2 is connected to the upper cover 4, and the top cover 2 is used for tightly abutting against the end of the filling sealing piece 3.

When the high-pressure regulating valve structure is in an off state, water on the water inlet side can sequentially pass through the water through hole, the gap between the sleeve 17 and the piston type valve core 7, the back side hole 18 and the pilot valve cavity to apply water pressure to the piston type valve core 7, and at the moment, the piston type valve core 7 can have larger pressing force to enable the piston type valve core 7 to be pressed on the valve seat 13, so that the sealing performance in a high-water-pressure-difference environment is ensured; when the high-pressure regulating valve needs to be opened, the operating rod 1 needs to be pulled axially, the operating rod 1 firstly drives the pilot valve core 5 to open the pilot hole 15 in the middle of the piston type valve core 7, so that water can pass through, the water pressure difference between the water inlet 10 and the water outlet 9 is reduced, the pilot valve core 5 can drive the piston type valve core 7 to move upwards through the disc-shaped part 14 of the pilot valve core, so that the sealing position between the piston type valve core 7 and the valve seat 13 is opened, and when the eye sleeve 17 of the piston type valve core 7 moves to the position above the water through hole, the water inlet 10 and the water outlet 9 can be directly communicated; in the process, the pilot valve core 5 is opened in advance, so that the pressure difference is reduced, and then the piston type valve core 7 is driven to be opened, so that the execution force required in the opening and closing process of the high-pressure regulating valve is reduced.

The above examples are merely for clearly illustrating the examples and are not intended to limit the embodiments; other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A pilot-operated high-pressure regulating valve is characterized in that: comprises a valve body (11), a valve seat (13), a sleeve (17) and a valve core assembly; a main valve cavity (19) is arranged in the valve body (11), the valve seat (13) and the sleeve (17) are both arranged in the main valve cavity (19), the valve seat (13) is arranged at one end of the sleeve (17), a water through hole is arranged on the side wall of the sleeve (17), and the water inlet hole is communicated with the water inlet (10) of the valve body (11); the valve core assembly comprises a pilot valve core (5) and a piston valve core (7), and the piston valve core (7) is slidably arranged in the sleeve (17) and is in clearance fit with the sleeve; the piston type valve core (7) can be in sealing fit with the valve seat (13); the center of the piston type valve core (7) is provided with a pilot hole (15), the pilot hole (15) is communicated with the other end of the sleeve, one end of the pilot valve core (5) is arranged in the piston type valve core (7) and can drive the piston type valve core (7) to move, and the end part of the pilot valve core (5) can be in sealing fit with the hole edge of the pilot hole (15).

2. The piloted high pressure regulator valve as in claim 1, wherein: the valve core assembly further comprises a linkage ring (6), the linkage ring (6) is slidably sleeved outside the pilot valve core (5) and fixedly connected with the piston type valve core (7), a plurality of back side holes (18) are uniformly distributed on the linkage ring (6), and the back side holes (18) are communicated with the pilot hole.

3. The piloted high pressure regulator valve as in claim 2, wherein: a pilot valve cavity is arranged in the piston type valve core (7), the pilot valve cavity is communicated with a back side hole (18) and a pilot hole (15), a ball head part (16) is arranged at the end part of the pilot valve core (5), and the ball head part (16) can be in sealing fit with the hole edge of the pilot hole (15).

4. The piloted high pressure regulator valve as in claim 3, wherein: a disc part (14) is arranged at the position of the pilot valve core (5) close to the ball head part (16), and a return spring (8) in a compressed state is arranged between the disc part (14) and the bottom wall of the pilot valve cavity.

5. The piloted high pressure regulator valve as in claim 1, wherein: the valve seat (13) is in a cylindrical shape with a bottom, and a plurality of through holes are formed in the bottom of the valve seat (13).

6. The piloted high pressure regulator valve as in claim 1, wherein: the water outlet (9) and the water inlet (10) of the valve body (11) are communicated with the main valve cavity (19), and the water outlet (9) and the water inlet (10) are arranged in a staggered mode.

7. The piloted high pressure regulator valve as in claim 1, wherein: an upper cover (4) is connected to the valve body (11), an operating rod (1) is arranged in the upper cover (4), one end of the operating rod (1) is connected with the pilot valve core (5), and the other end of the operating rod (1) extends out of the upper cover (4).

8. The piloted high pressure regulator valve as in claim 7, wherein: a guide bush (12) is sleeved outside the guide valve core (5), and the guide bush (12) is fixed on the upper cover (4).

9. The piloted high pressure regulator valve as in claim 8, wherein: be provided with between action bars (1) and upper cover (4) and fill sealing member (3), fill sealing member (3) and be tubulose and be used for sealing the clearance between action bars (1) and upper cover (4) be connected with top cap (2) on upper cover (4), top cap (2) are used for supporting tightly fills the end department of sealing member (3).

10. The piloted high pressure regulator valve as in claim 7, wherein: the upper cover (4) is of an inverted T-shaped structure, and the upper cover (4) is detachably connected with the valve body (11) through bolts.