CN218845164U

CN218845164U - Double-sealing and multi-stage pressure reduction structure valve

Info

Publication number: CN218845164U
Application number: CN202223314663.XU
Authority: CN
Inventors: 洪绿柳; 洪伟彬; 陈碧英
Original assignee: Energy Valve Manufacturing Shanghai Co ltd
Current assignee: Energy Valve Manufacturing Shanghai Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-11
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a double containment and multistage decompression structure valve, including the valve body, the valve body is connected with the threaded rod, and the threaded rod below is fixed with seal structure, and seal structure and valve body looks adaptation, seal structure are used for sealing the valve body, and the threaded rod top is connected with the adjustment disk. The main seal is a main seal by the joint of the main seal cylinder and the valve body, the auxiliary seal is an auxiliary seal by the joint of the first auxiliary seal cylinder and the second auxiliary seal cylinder with the valve body, the auxiliary seal is a sliding cylindrical seal consisting of the valve core and the valve body, the seal form is similar to that of a plunger valve, the three seals form a set of combined seal and cooperate with each other, the main seal in the middle mainly bears the tight shutoff work, the front and the rear auxiliary seals mainly bear the throttling work, so that the main seal is protected from being washed away as much as possible, meanwhile, the main seal is shut off tightly without leakage, and the auxiliary seals are protected from being washed away by leakage flow in reverse, thereby realizing the bidirectional protection and prolonging the service life.

Description

Double-sealing and multi-stage pressure reduction structure valve

Technical Field

The utility model relates to a governing valve technical field especially relates to a double containment and multistage pressure reduction structure valve.

Background

In the automatic control of modern factories, regulating valves play an important role, and the production of these factories depends on the correct distribution and control of flowing media, and the sectional area between the valve core and the valve seat is changed to control the process parameters of flow, temperature, pressure and the like of the pipeline media, so as to realize the regulating function.

At present, the current governing valve generally realizes opening and closing the governing valve through case and valve body laminating, but the sealed face of case is located liquid flow mouth department, leads to opening and when closing at the valve, and the sealed face of case can all be erodeed to liquid, and long-time washing can lead to the sealed face of case impaired, influences sealed effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art, and provides a double-sealing and multi-stage pressure reduction structure valve, which comprises a valve body, wherein the valve body is connected with a threaded rod, a sealing structure is fixed below the threaded rod and is matched with the valve body, the sealing structure is used for sealing the valve body, the upper part of the threaded rod is connected with an adjusting disc, and both sides of the valve body are respectively provided with a liquid inlet pipe and a liquid outlet pipe;

the pressure reducing structure is fixed inside the valve body and used for reducing pressure of liquid flowing into the valve body.

Preferably, the sealing structure comprises a main sealing cylinder, the upper part of the main sealing cylinder is connected with a first auxiliary sealing cylinder, the lower part of the main sealing cylinder is connected with a second auxiliary sealing cylinder, and the upper part of the first auxiliary sealing cylinder is connected with a threaded rod through a connecting block.

Preferably, the primary sealing cylinder, the first secondary sealing cylinder and the second secondary sealing cylinder are integrally formed.

Preferably, the sealing main cylinder is in a circular truncated cone shape.

Preferably, the pressure reduction structure comprises a pressure reduction outer barrel and a pressure reduction inner barrel, the pressure reduction outer barrel is fixed inside the valve body, the pressure reduction inner barrel is arranged inside the pressure reduction outer barrel, and the lower portion of the pressure reduction inner barrel is connected with the valve body.

Preferably, the surface of the depressurization outer cylinder is provided with a plurality of first depressurization holes.

Preferably, the surface of the depressurization inner cylinder is provided with a plurality of second depressurization holes.

Preferably, the diameter of the first pressure reduction hole is slightly larger than that of the second pressure reduction hole, and the first pressure reduction hole and the second pressure reduction hole are staggered.

Preferably, the valve body is internally provided with through holes, and the two through holes are respectively connected with the liquid inlet pipe and the liquid outlet pipe.

Preferably, a threaded hole is formed in the upper portion of the valve body, and the threaded hole is matched with the threaded rod.

The technical scheme has the following advantages or beneficial effects:

the utility model discloses a sealed main section of thick bamboo is main seal with the valve body laminating, be auxiliary seal through first sealed auxiliary cylinder and the sealed auxiliary cylinder of second and the valve body laminating, it is sealed by the slip cylinder that case and valve body constitute through auxiliary seal, sealed form is just like the plunger valve, this three seals have constituted one set of composite seal, the collaborative work of mutually supporting, the work of turn-offeing is mainly born strictly to middle one main seal, two auxiliary seal mainly undertake throttle work around it, make the main seal of protecting as far as possible not erodeed, the main seal is turn-offed tightly leak simultaneously, it is not erodeed by the weeping to have protected auxiliary seal again in reverse, bidirectional protection has been realized, service life is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a regulating valve according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a regulating valve according to an embodiment of the present invention in an operating state;

fig. 3 is a schematic structural view of a regulating valve according to an embodiment of the present invention in a sealing state;

fig. 4 is a schematic structural view of a pressure reducing structure in the regulating valve of fig. 2.

Illustration of the drawings:

1. a valve body; 2. a threaded rod; 3. a sealing structure; 4. an adjusting disk; 5. a liquid outlet pipe; 6. a pressure reduction structure; 7. a through hole; 8. a threaded hole; 9. a liquid inlet pipe; 31. sealing the main cylinder; 32. a first sealed secondary cylinder; 33. a second sealed secondary cylinder; 34. connecting blocks; 61. a decompression outer cylinder; 62. an inner barrel for reducing blood pressure; 63. a first pressure-reducing hole; 64. a second pressure-reducing vent.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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.

The first embodiment is as follows:

as shown in fig. 1-4, the double-sealing and multi-stage pressure-reducing structure valve of the present invention comprises a valve body 1, the valve body 1 is connected with a threaded rod 2, a sealing structure 3 is fixed below the threaded rod 2, the sealing structure 3 is adapted to the valve body 1, the sealing structure 3 is used for sealing the valve body 1, the upper part of the threaded rod 2 is connected with an adjusting disc 4, and both sides of the valve body 1 are respectively provided with a liquid inlet pipe 9 and a liquid outlet pipe 5; the pressure reducing structure 6 is fixed in the valve body 1, and the pressure reducing structure 6 is used for reducing the pressure of the liquid flowing into the valve body 1; by adopting three seals, the line seal is a main seal, and the auxiliary seals of two sliding cylindrical seals are respectively positioned in front of and behind the main seal and are used for protecting the main seal from being washed away during the opening and closing of the valve.

As shown in fig. 1, further, a through hole 7 is formed in the valve body 1, the two through holes 7 are respectively connected with the liquid inlet pipe 9 and the liquid outlet pipe 5, a threaded hole 8 is formed above the valve body 1, and the threaded hole 8 is matched with the threaded rod 2; through threaded rod 2 internal rotation in screw hole 8, make things convenient for opening and closing of governing valve.

As shown in fig. 1 and 4, the sealing structure 3 comprises a sealing main cylinder 31, the upper part of the sealing main cylinder 31 is connected with a first sealing auxiliary cylinder 32, the lower part of the sealing main cylinder 31 is connected with a second sealing auxiliary cylinder 33, the upper part of the first sealing auxiliary cylinder 32 is connected with the threaded rod 2 through a connecting block 34, the sealing main cylinder 31, the first sealing auxiliary cylinder 32 and the second sealing auxiliary cylinder 33 are integrally formed, and the sealing main cylinder 31 is in a circular truncated cone shape; the main seal of the sleeve type stop valve is not washed away, and actually, the main seal of the sleeve type stop valve only bears the throttling task all the time during the opening and closing of the valve and the full opening state of the valve, the main seal only bears the throttling task, the auxiliary seal is closed all the time, the main seal is closed finally, the main seal is connected in series, one of the middle stop valves (the main seal) bears the main stopping task, the front and the rear stop valves (the main seal) thereof bear the main stopping task, the auxiliary seal (the auxiliary seal) thereof is closed all the time, the main seal is closed all the time, the main seal is not tightly, the main seal is protected from being washed away, the service life of the main seal is prolonged, and the auxiliary seal is protected from being washed away.

Example two:

as shown in fig. 2, on the basis of the first embodiment, the utility model provides a technical solution: the pressure reducing structure 6 comprises a pressure reducing outer cylinder 61 and a pressure reducing inner cylinder 62, the pressure reducing outer cylinder 61 is fixed inside the valve body 1, the pressure reducing inner cylinder 62 is arranged inside the pressure reducing outer cylinder 61, the lower part of the pressure reducing inner cylinder 62 is connected with the valve body 1, first pressure reducing holes 63 are formed in the surface of the pressure reducing outer cylinder 61, a plurality of first pressure reducing holes 63 are formed, second pressure reducing holes 64 are formed in the surface of the pressure reducing inner cylinder 62, and a plurality of second pressure reducing holes 64 are formed; through the outer tube 61 that steps down and the inner tube 62 surface that steps down seted up a plurality of first step-down holes 63 and second step-down hole 64, and the position of first step-down hole 63 and second step-down hole 64 staggers each other, when liquid gets into through-hole 7 by feed liquor pipe 9, can impact step-down outer tube 61 earlier, get into between step-down outer tube 61 and the step-down inner tube 62 by first step-down hole 63 after the decompression again, then strike step-down inner tube 62 again, enter into step-down inner tube 62 inside by second step-down hole 64 after the decompression, last liquid strikes step-down outer tube 61 and step-down inner tube 62 in proper order again, flow out by drain pipe 5, liquid wherein through decompression many times, good step-down effect has been reached.

As shown in fig. 1 and 3, the diameter of the first pressure-reducing hole 63 is slightly larger than that of the second pressure-reducing hole 64, and the first pressure-reducing hole 63 is offset from the second pressure-reducing hole 64.

The working principle is as follows: a worker drives the threaded rod 2 to rotate in the threaded hole 8 by rotating the adjusting disc 4, so that the adjusting valve is opened and closed, the adjusting valve is jointed with the valve body 1 to form a main seal through the sealing main cylinder 31, the adjusting valve is jointed with the valve body 1 to form an auxiliary seal through the first sealing auxiliary cylinder 32 and the second sealing auxiliary cylinder 33, the adjusting valve is jointed with the valve body 1 to form an auxiliary seal, the auxiliary seal is a sliding cylindrical seal formed by the valve core and the valve body 1 and is like a plunger valve, the three seals form a set of combined seal and are mutually matched and cooperated to work, when the valve is just opened, the main seal is firstly opened by jointing the sealing main cylinder 31 and the valve body 1, at the moment, two auxiliary seal valves positioned in front of and behind the main seal are opened, almost no flow passes through the valve, and when the valve is at a certain height, the two auxiliary seals are opened, the main seal does not bear throttling and certainly is not washed, in fact, the main seal of the sleeve type stop valve does not bear throttling tasks all the time during the opening and closing of the valve and in the full opening state of the valve, the main seal only bears the sealing task, when the valve is closed, the auxiliary seal is closed first, and the main seal is closed finally, just as three stop valves are connected in series on a pipeline, one stop valve (the main seal) in the middle mainly bears the tight shutoff work, and the front stop valve and the rear stop valve (the auxiliary seals) mainly bear the throttling work, so that the main seal is protected from being washed as much as possible, meanwhile, the main seal is tightly closed and cannot leak, and the auxiliary seals are protected from being washed by leakage flow in turn, thereby realizing the bidirectional protection and prolonging the service life.

Finally, it should be noted that: 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 and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The double-seal and multi-stage pressure reduction structure valve comprises a valve body (1) and is characterized in that the valve body (1) is connected with a threaded rod (2), a seal structure (3) is fixed below the threaded rod (2), the seal structure (3) is matched with the valve body (1), the seal structure (3) is used for sealing the valve body (1), the upper part of the threaded rod (2) is connected with an adjusting disc (4), and a liquid inlet pipe (9) and a liquid outlet pipe (5) are respectively arranged on two sides of the valve body (1);

the pressure reducing structure (6), the pressure reducing structure (6) is fixed inside the valve body (1), and the pressure reducing structure (6) is used for reducing pressure of liquid flowing into the inside of the valve body (1).

2. The dual sealing and multi-stage pressure reducing structural valve according to claim 1, wherein: the sealing structure (3) comprises a sealing main cylinder (31), wherein the upper part of the sealing main cylinder (31) is connected with a first sealing auxiliary cylinder (32), the lower part of the sealing main cylinder (31) is connected with a second sealing auxiliary cylinder (33), and the upper part of the first sealing auxiliary cylinder (32) is connected with the threaded rod (2) through a connecting block (34).

3. The dual sealing and multi-stage pressure reducing structural valve according to claim 2, wherein: the sealing main cylinder (31), the first sealing auxiliary cylinder (32) and the second sealing auxiliary cylinder (33) are integrally formed.

4. The dual sealing and multi-stage pressure reducing structural valve according to claim 2, wherein: the sealing main cylinder (31) is in a circular truncated cone shape.

5. The dual sealing and multi-stage pressure reducing structural valve according to claim 1, wherein: the pressure reduction structure (6) comprises a pressure reduction outer barrel (61) and a pressure reduction inner barrel (62), the pressure reduction outer barrel (61) is fixed inside the valve body (1), the pressure reduction inner barrel (62) is arranged inside the pressure reduction outer barrel (61), and the pressure reduction inner barrel (62) is connected with the valve body (1) below.

6. The dual sealing and multi-stage pressure reducing structural valve according to claim 5, wherein: first pressure reduction holes (63) are formed in the surface of the pressure reduction outer cylinder (61), and a plurality of first pressure reduction holes (63) are formed.

7. The dual sealing and multi-stage pressure reducing structural valve according to claim 5, wherein: the surface of the pressure reduction inner cylinder (62) is provided with a plurality of second pressure reduction holes (64), and the second pressure reduction holes (64) are arranged.

8. The dual sealing and multi-stage pressure reducing structural valve according to claim 6, wherein: the diameter of the first depressurization hole (63) is slightly larger than that of the second depressurization hole (64), and the first depressurization hole (63) and the second depressurization hole (64) are staggered.

9. The dual sealing and multi-stage pressure reducing structural valve according to claim 1, wherein: through holes (7) are formed in the valve body (1), and the two through holes (7) are respectively connected with the liquid inlet pipe (9) and the liquid outlet pipe (5).

10. The dual sealing and multi-stage pressure reducing structural valve according to claim 1, wherein: a threaded hole (8) is formed in the upper portion of the valve body (1), and the threaded hole (8) is matched with the threaded rod (2).