CN220268464U

CN220268464U - Valve rod leakage-proof structure of valve

Info

Publication number: CN220268464U
Application number: CN202322019806.2U
Authority: CN
Inventors: 张春燕; 孙激和; 张春莲; 曹家福
Original assignee: Zhejiang Xinnuo Valve Co ltd
Current assignee: Zhejiang Xinnuo Valve Co ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2023-12-29
Anticipated expiration: 2033-07-28

Abstract

The utility model discloses a valve rod leakage-proof structure of a valve, which relates to the technical field of valve structures and comprises a valve body, a valve rod and a valve, wherein a sealing gasket is attached to the inner wall of a circulation cavity of the valve body, the valve rod and the valve are integrally connected and arranged in the valve body, the valve is arranged in the circulation cavity of the valve body in a sealing way, two sides of the valve are in an abutting arrangement with the sealing gasket, two groups of half-arc sealing gaskets are attached and fixed on the outer arc edges of two symmetrical sides of the valve, a handle is fixedly connected to the upper rod part of the valve rod, a notch convenient for holding is formed in the surface of the handle rod part, a shaft sleeve is fixedly sleeved on one side rod part of the valve rod, a multiple leakage-proof structure is further arranged in the valve body, and the multiple leakage-proof structure comprises a first dustproof ring, a first sealing ring, a second dustproof ring, a second sealing ring, RPTFE filler, a pressure spring, a sealing pressing sheet and a graphite woven filler, so that leakage prevention is ensured, and the use safety and effect of the valve are improved.

Description

Valve rod leakage-proof structure of valve

Technical Field

The utility model relates to the technical field of valve structures, in particular to a valve rod leakage-proof structure of a valve.

Background

The valve types include gate valve, stop valve, butterfly valve, ball valve, plug valve, check valve, pressure reducing valve, drain valve, etc. The butterfly valve is also called butterfly valve or flap valve, and the key part is like butterfly windward, freely revolves, is a comparatively simple structure's governing valve for the on-off control of low pressure pipeline medium, realizes opening and closing through the valve plate rotation around the valve shaft.

The existing valve rod lacks a leakage-proof mechanism, and after long-term use, the abrasion is serious due to the rigid contact of the contact surface, so that the sealing performance begins to be reduced, fluid is easy to leak, and the use effect and the safety of the valve are affected.

Disclosure of Invention

The utility model aims to provide a valve rod leakage-proof structure of a valve, which solves the technical problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a valve rod leak protection structure, includes valve body, valve rod and valve, sealed pad is installed in the laminating of the circulation intracavity wall of valve body, the valve rod with the valve is integrated adapter sleeve and establishes in the valve body, the valve seals the setting in the circulation intracavity of valve body, just the both sides of valve with sealed pad is the conflict setting, the outer arc limit laminating of valve symmetry both sides is fixed with two sets of semi-arc sealing pad, the upper stem portion fixedly connected with handle of valve rod, the notch of being convenient for hold has been seted up on the surface of handle pole portion, one side pole portion fixed sleeve of valve rod is equipped with the axle sleeve, the valve rod is in still be provided with the multiple structure that is used for preventing leaking in the valve body.

Optionally, the multiple structure for preventing leakage includes a first dust ring, a first sealing ring, a second dust ring, a second sealing ring, an RPTFE filler, a compression spring, a sealing pressing sheet and a graphite woven filler.

Optionally, the valve body with sealing pad is kept away from one side inner wall of handle has offered jointly and has supplied valve rod pivoted rotation groove, first sealing washer fixed plug is established rotation groove diapire with between the bottom pole portion of valve rod, first dust ring laminating is fixed one side of first sealing washer, just first dust ring fixed cover is established the pole end outside of valve rod.

Optionally, the fixed cover of second dust ring is established the valve rod is kept away from the outer pole portion of valve, the laminating of second sealing washer is fixed the face of going up of second dust ring, the pressure spring welded in between the seal preforming with the second sealing washer, just the RPTFE packing is sealed to be filled in the cavity between the seal preforming with the second sealing washer.

Optionally, a recess pressed on the sealing pressing piece is formed in a rod portion, attached to the sealing pressing piece, of the valve rod.

Optionally, the valve rod is located the axle sleeve with the fixed cover of packing is equipped with the abrasionproof pad between the graphite woven filler.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the multiple structures of the valve rod in the valve body are utilized for preventing leakage, when an operator rotates the handle and closes the valve through the valve rod, the first sealing ring and the second sealing ring can play a role in primary sealing, the valve rod drives the shaft sleeve to rotate, meanwhile, in the rotating process, the notch of the valve rod extrudes the sealing pressing sheet, and the elastic force of the pressure spring is utilized to push the second sealing ring, so that the notch of the valve rod and the sealing pressing sheet generate interference fit, the sealing effect of RPTFE packing is enhanced, the tightness between the valve plate and the flow channel in the valve body can be improved through the interference fit, the abrasion of the sealing piece is less prone to being caused by rigid contact, the valve is more reliable and stable to use, and the graphite woven packing can further ensure the leakage preventing effect of the valve rod of the valve, so that the leakage preventing purpose is ensured, and the safety and the use effect of the valve are improved.

In addition, in the valve rod switch valve's in-process, the valve rod produces the rotation in the rotary tank of valve body, and first dust ring and second dust ring are collocation first sealing washer and second sealing washer can avoid the dust entering of rotation in-process, have dirt-proof sealed effect.

2. According to the utility model, the semi-arc sealing gasket is arranged on the valve, so that no matter an operator rotates the valve rod according to the required flow demand, the valve is opened to any angle, the sealing property of the valve in the valve opening circulation process can be ensured by the sealing gasket, the semi-arc sealing gasket on the valve is matched with the sealing gasket, the sealing effect of the interior of the valve is enhanced, the purpose of leakage prevention is further ensured, and the use effect of the valve is also improved.

Drawings

FIG. 1 is a front view of the structure of the present utility model;

FIG. 2 is a front cross-sectional view of the structure of the present utility model;

fig. 3 is an enlarged view of the structure of the present utility model at a in fig. 2.

In the figure: 1-valve body, 2-sealing gasket, 3-valve rod, 4-valve, 5-handle, 6-half arc sealing gasket, 7-rotary groove, 8-first dust ring, 9-first sealing ring, 10-second dust ring, 11-second sealing ring, 12-pressure spring, 13-RPTFE packing, 14-notch, 15-sealing tabletting, 16-shaft sleeve, 17-anti-abrasion pad and 18-graphite woven packing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one:

referring to fig. 1 to 3, the present utility model provides a technical solution: the utility model provides a valve rod leak protection structure, including valve body 1, valve rod 3 and valve 4, sealed 2 is installed to the laminating of valve body 1's circulation intracavity wall, valve rod 3 and valve 4 are the integration adapter sleeve and establish in valve body 1, valve 4 seals the circulation intracavity that sets up at valve body 1, and the both sides of valve 4 are the conflict setting with sealed 2, the last pole part fixedly connected with handle 5 of valve rod 3, the notch of being convenient for hold has been seted up on the surface of handle 5 pole parts, one side pole part fixed sleeve of valve rod 3 is equipped with axle sleeve 16, valve rod 3 still is provided with the multiple structure that is used for preventing leaking in valve body 1.

The multiple structure is including first dust ring 8, first sealing washer 9, second dust ring 10, second sealing washer 11, RPTFE packing 13, pressure spring 12, sealed preforming 15 and graphite weave packing 18, valve body 1 and sealed one side inner wall that pad 2 kept away from handle 5 have offered jointly and supplied valve rod 3 pivoted rotary groove 7, the fixed stopper of first sealing washer 9 is established between rotary groove 7 groove diapire and valve rod 3's bottom pole portion, first dust ring 8 laminating is fixed in one side of first sealing washer 9, and first dust ring 8 fixed cover is established in valve rod 3's bottom of the pole outside, the fixed cover of second dust ring 10 is established in valve rod 3 and is kept away from valve 4's outer pole portion, second sealing washer 11 laminating is fixed in second dust ring 10's upper circle face, pressure spring 12 welds between sealed preforming 15 and second sealing washer 11, and RPTFE packing 13 seal fills in the cavity between sealed preforming 15 and second sealing washer 11, valve rod 3 laminating seal preforming 15's pole portion has offered the notch 14 of pressing in sealed preforming 15.

More specifically, in the present embodiment, when the operator turns the handle 5 to close the valve 4 through the valve stem 3, the first seal ring 9 and the second seal ring 11 can exert an effect of preliminary sealing.

The valve rod 3 drives the shaft sleeve 16 to rotate, meanwhile, in the rotating process, the notch 14 of the valve rod 3 extrudes the sealing pressing piece 15, and the second sealing ring 11 is pushed by the elastic force of the pressure spring 12, so that the notch 14 of the valve rod 3 and the sealing pressing piece 15 generate interference fit, and the sealing effect of the RPTFE packing 13 is enhanced.

The tightness between the valve 4 and the circulation groove in the valve body 1 can be improved through interference fit, the abrasion of the sealing element caused by rigid contact is less likely, the use is more reliable and stable, and the graphite woven packing 18 can further ensure the anti-leakage effect of the valve rod 3 of the valve 4, so that the anti-leakage purpose is ensured, and the use safety and effect of the valve 4 are improved.

The outer arc edge laminating of valve 4 symmetry both sides is fixed with two sets of half arc sealing gasket 6 to through the half arc sealing gasket 6 that sets up on valve 4, make no matter the operator according to required circulation demand, rotate valve rod 3, make valve 4 open the valve to arbitrary angle, except sealing gasket 2 can ensure the leakproofness of valve 4 open the valve circulation in-process, the sealing gasket 6 on the valve 4 also will cooperate with sealing gasket 2, strengthen the inside sealed effect of valve 4, thereby further ensured the purpose of preventing leakage, also improved valve 4 result of use.

In addition, in the process of opening and closing the valve 4 by the valve rod 3, the valve rod 3 rotates in the rotating groove 7 of the valve body 1, and the first dust ring 8 and the second dust ring 10 are matched with the first sealing ring 9 and the second sealing ring 11, so that dust in the rotating process can be prevented from entering, and the dustproof sealing effect is achieved.

Furthermore, a wear-proof pad 17 is fixedly sleeved between the shaft sleeve 16 and the graphite woven packing 18 of the valve rod 3.

It should be noted that, in the long-term rotation process of the valve rod 3, in order to avoid rigid rotation abrasion, an anti-abrasion pad 17 is specially sleeved on the rod portion of the valve rod 3, so as to achieve the purpose of repeatedly abrading the valve rod 3.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a valve rod leak protection structure, includes valve body (1), valve rod (3) and valve (4), its characterized in that: the inner wall of the circulation cavity of the valve body (1) is provided with a sealing gasket (2) in a fitting way, and the valve rod (3) and the valve (4) are arranged in the valve body (1) in an integrated connecting sleeve way;

the valve (4) is arranged in the circulation cavity of the valve body (1) in a sealing way, two sides of the valve (4) are in abutting arrangement with the sealing gasket (2), and two groups of half-arc sealing gaskets (6) are fixedly attached to outer arc edges of two symmetrical sides of the valve (4);

the utility model discloses a valve body, including valve rod (3), valve rod (1), handle (5) are fixed to upper rod portion fixedly connected with of valve rod (3), the notch of being convenient for hold has been seted up on the surface of handle (5) rod portion, one side rod portion fixed cover of valve rod (3) is equipped with axle sleeve (16), valve rod (3) are in still be provided with the multiple structure that is used for preventing leaking in valve body (1).

2. A valve stem leak-proof structure as defined in claim 1, wherein: the multiple structure comprises a first dustproof ring (8), a first sealing ring (9), a second dustproof ring (10), a second sealing ring (11), RPTFE packing (13), a pressure spring (12), a sealing pressing sheet (15) and graphite woven packing (18).

3. A valve stem leak-proof structure as defined in claim 2, wherein: the valve body (1) with sealed pad (2) are kept away from one side inner wall of handle (5) has offered jointly and has supplied valve rod (3) pivoted rotary groove (7), first sealing washer (9) are fixed to be filled in and are established rotary groove (7) diapire with between the sill bar portion of valve rod (3), first dust ring (8) laminating is fixed one side of first sealing washer (9), just first dust ring (8) are fixed to be overlapped and are established the pole end outside of valve rod (3).

4. A valve stem leak-proof structure as defined in claim 3, wherein: the second dustproof ring (10) is fixedly sleeved on the outer rod part of the valve rod (3) far away from the valve (4), the second sealing ring (11) is fixedly attached to the upper ring surface of the second dustproof ring (10), the pressure spring (12) is welded between the sealing pressing piece (15) and the second sealing ring (11), and the RPTFE packing (13) is filled in the cavity between the sealing pressing piece (15) and the second sealing ring (11) in a sealing mode.

5. The valve stem leak-proof structure of claim 4, wherein: the valve rod (3) is attached to the rod part of the sealing pressing piece (15), and a notch (14) pressed on the sealing pressing piece (15) is formed.

6. The valve stem leak-proof structure of claim 5, wherein: the valve rod (3) is fixedly sleeved with an anti-abrasion pad (17) between the shaft sleeve (16) and the graphite woven packing (18).