CN222067773U

CN222067773U - A leak-proof stop valve

Info

Publication number: CN222067773U
Application number: CN202420849761.3U
Authority: CN
Inventors: 范文浩; 范建锋; 黄旭华
Original assignee: Qingtian Yonghe Valve Manufacturing Co ltd
Current assignee: Qingtian Yonghe Valve Manufacturing Co ltd
Priority date: 2024-04-22
Filing date: 2024-04-22
Publication date: 2024-11-26
Anticipated expiration: 2034-04-22

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a leakage-proof stop valve, which comprises: the valve body is internally provided with a fluid channel, and two ends of the valve body are provided with connecting flanges; the valve cover is arranged at the top end of the valve body, a valve rod is arranged on the valve cover, a hand wheel is arranged at the top end of the valve rod, and a valve clack is arranged at the bottom end of the valve rod; a valve seat disposed in the fluid passage; further comprises: the anti-impact section is arranged at one end of the valve body and positioned at the inlet of the fluid channel, and is used for reducing the impact of fluid on the valve clack; the sealing part is arranged at the bottom end of the valve clack; the sealing part can be contacted and matched with the valve seat to form conventional sealing and matched with the valve seat to carry out extrusion sealing after the valve clack is closed.

Description

Leakage-proof stop valve

Technical Field

The utility model belongs to the technical field of valves, and particularly relates to a leakage-proof stop valve.

Background

The stop valve is also called a stop valve, belongs to a forced sealing type valve, an opening and closing part of the stop valve is a plug-shaped valve clack, the sealing upper surface is a plane or a sea conical surface, the valve clack moves linearly along the central line of a valve seat and is generally used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and the stop valve comprises a valve body, a valve core and the valve clack, wherein an installation sleeve is fixed on the inner wall of the upper part of the valve body, and the valve core is positioned in the installation sleeve and connected with the installation sleeve through threads; the middle part of the upper end of the valve core is inwards sunken, and clamping ports are circumferentially distributed on the inner concave surface; the valve rod at the lower end of the valve core is fixed with the valve clack through a ball; the lower part of the valve clack is spherical, the upper part of the valve clack is provided with a groove, and the end part of the valve rod is embedded in the groove; the contact part of the valve rod and the mounting sleeve is sealed by a sealing sleeve; a wear-resistant sealing layer is arranged on the spherical sealing surface of the valve clack; a sealing gasket is arranged on the valve seat where the valve body is in contact with and seals with the valve clack;

The existing stop valve is sealed in the use process through a sealing gasket and a sealing layer, the problem of leakage still occurs because of insufficient tightness in the use process, meanwhile, in the use process of the stop valve, a valve core or a valve clack is easy to be impacted due to a water hammer effect when being closed, so that the stop valve is easy to be damaged, the service life of the stop valve is reduced, and therefore, the improvement is necessary.

Disclosure of utility model

The utility model aims at solving the technical problems and provides a leakage-proof stop valve so as to improve the sealing performance and the service life of the stop valve.

In view of this, the present utility model provides a leak-proof shutoff valve including:

the valve body is internally provided with a fluid channel, and two ends of the valve body are provided with connecting flanges;

The valve cover is arranged at the top end of the valve body, a valve rod is arranged on the valve cover, a hand wheel is arranged at the top end of the valve rod, and a valve clack is arranged at the bottom end of the valve rod;

a valve seat disposed in the fluid passage;

Further comprises:

The anti-impact section is arranged at one end of the valve body and positioned at the inlet of the fluid channel and is used for reducing the impact of fluid on the valve clack;

the sealing part is arranged at the bottom end of the valve clack;

The sealing part can be contacted and matched with the valve seat to form conventional sealing and matched with the valve seat to carry out extrusion sealing after the valve clack is closed.

In this technical scheme, stop valve is in the use, when the valve clack is closed, the section of shocking resistance can effectively bear the impact that the water hammer effect that the fluid produced after being cut off suddenly caused to prevent that the valve clack from receiving the impact and appearing damaging the phenomenon, improved the life of stop valve, sealing portion when the valve clack is closed, when the valve clack is closed not closely enough, sealing portion also can constitute conventional seal with the disk seat cooperation, thereby reduce the emergence of leakage phenomenon, when the valve clack is closed, sealing portion can carry out extrusion seal with the disk seat cooperation, the sealed effect of stop valve has been improved.

In the above technical solution, further, the sealing portion further includes:

The sealing seats are in reverse taper distribution from top to bottom, and adjacent sealing seats are movably connected with each other;

the sealing ring is arranged between the adjacent sealing seats, and the outer diameter of the sealing ring is larger than the diameter of the sealing seat.

In the above technical solution, further, the seal ring further includes:

the sealing ring comprises a sealing ring main body, wherein a cavity is formed in the lower half part of the sealing ring main body;

Wherein, the cavity extends along the circumference of sealing washer main part and distributes.

In the above technical solution, further, the impact resistant section further includes:

The anti-impact plate is arranged in the anti-impact section and is spherical, and holes with different sizes are distributed in the anti-impact plate.

In the above technical solution, further, the method further includes:

the sealing strip is arranged between the valve cover and the valve body and is used for sealing the valve cover and the valve body.

The beneficial effects of the utility model are as follows:

1. The impact resistance section is arranged to effectively bear the impact caused by the water hammer effect generated after the fluid is suddenly intercepted, so that the valve clack is prevented from being damaged due to the impact, and the service life of the stop valve is prolonged;

2. The leakage phenomenon can be effectively reduced and the sealing performance of the stop valve is improved through the arrangement of the sealing part;

3. The sealing performance of the stop valve can be further improved through the arrangement of the sealing ring main body and the cavity.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of the present utility model.

FIG. 3 shows the impact resistance of the present utility model schematic diagram of the plate structure.

FIG. 4 is a partially enlarged schematic view of the structure of the A part of the present utility model.

FIG. 5 is a schematic view of a seal ring according to the present utility model.

The label in the figure is:

1. A valve body; 100. a fluid channel; 101. a connecting flange; 2. a valve cover; 3. a valve stem; 4. a hand wheel; 5. a valve flap; 6. a valve seat; 7. an impact resistant section; 70. an impact resistant plate; 71. a hole; 8. a sealing part; 80. a sealing seat; 81. a seal ring; 810. a seal ring main body; 811. a cavity; 9. and (5) a sealing strip.

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.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Valve body, valve cover and valve clack

This embodiment proposes a current stop valve body 1, valve gap 2 and valve clack 5, valve body 1 has conventional shape, valve body 1 inside is provided with fluid channel 100, the both ends of valve body 1 are provided with flange 101, valve body 1 passes through flange 101 and installs in fluid pipeline, valve gap 2 sets up the top at valve body 1, be provided with valve rod 3 on the valve gap 2, the top of valve rod 3 is provided with hand wheel 4, the bottom is provided with valve clack 5, adopt conventional mode to be connected between valve rod 3 and the valve clack 5, adopt conventional cooperation mode between valve rod 3 and valve body 1 and the valve gap 2, adopt conventional connected mode and bolted connection between valve gap 2 and the valve body 1, still include disk seat 6, disk seat 6 sets up in fluid channel 100, still include: sealing strip 9, sealing strip 9 sets up between valve gap 2 and valve body 1 and is used for sealing valve gap 2 and valve body 1.

Sealing part

Sealing portion 8, sealing portion 8 sets up the bottom at valve clack 5, and sealing portion 8 still includes: the sealing seats 80 are provided with a plurality of sealing seats 80 and are distributed in a reverse taper shape from top to bottom, and adjacent sealing seats 80 are movably connected with each other; the sealing ring 81, the sealing ring 81 sets up between adjacent sealing seat 80, the outside diameter of sealing ring 81 is greater than sealing seat 80 diameter, can adopt conventional swing joint mode to connect between the sealing seat 80, if can install the connecting rod between the adjacent sealing seat 80, one end and one sealing seat 80 fixed connection of connecting rod, another section and another sealing seat 80 swing joint, and this end has spacing in order to prevent two sealing seats 80 separation, the sealing ring 81 cover is established in the clearance of adjacent sealing seat 80, the bottom of disk seat 6 has the extrusion platform with sealing portion 8 complex, the extrusion platform can be along with valve clack 5's closure and the sealing seat 80 is extruded in valve rod 3 axial.

When the valve clack 5 is not tight enough, the sealing part 8 can also be matched with the valve seat 6 to form conventional sealing, so that the occurrence of leakage phenomenon is reduced, when the valve clack 5 is closed, the sealing part 8 can be matched with the valve seat 6 for extrusion sealing, the sealing effect of the stop valve is improved, and under the fluid pressure, the sealing seat 80 can be further extruded, so that the sealing ring 81 is matched with the valve seat 6 more tightly, the sealing part 8 can self-seal, and the sealing performance of the stop valve is further improved.

Sealing ring

Impact resistant segment

The impact-resistant section 7 is arranged at one end of the valve body 1 and positioned at the inlet of the fluid channel 100, and the impact-resistant section 7 is used for reducing the impact of fluid on the valve clack 5; the impact resistant segment 7 further comprises: the shock-resistant plate 70, the shock-resistant plate 70 sets up in the section of shocking resistance 7, the shock-resistant plate 70 is the sphere form, the distribution has the hole 71 that the size is different on the shock-resistant plate 70, the section of shocking resistance 7 can be the tubulose, section of shocking resistance 7 accessible flange joint is on valve body 1, the section of shocking resistance 7 has offered fluid channel 100 equally, have a plurality of connection lugs on the inner wall of section of shocking resistance 7, the edge of shock-resistant plate 70 along circumference distribution have a plurality of with connection lug complex connecting plate, shock-resistant plate 70 accessible bolt, connecting plate and connection lug cooperation demountable installation are in section of shocking resistance 7.

When the valve clack 5 is closed, the fluid is suddenly blocked to generate a water hammer effect, when the fluid is impacted and transmitted to the position of the impact-resistant plate 70, the spherical impact-resistant plate 70 and holes 71 distributed on the impact-resistant plate 70 and having different sizes can effectively change the flowing state of the fluid so as to effectively reduce the impact force of the fluid, thereby preventing the valve clack 5 from being damaged due to impact and prolonging the service life of the stop valve.

The embodiments of the present application have been described above with reference to the accompanying drawings, in which the embodiments of the present application and features of the embodiments may be combined with each other without conflict, the present application is not limited to the above-described embodiments, which are merely illustrative, not restrictive, of the present application, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are protected by the present application.

Claims

1. A leak-proof stop valve, comprising:

A valve body (1), wherein a fluid channel (100) is arranged inside the valve body (1), and connecting flanges (101) are arranged at both ends of the valve body (1);

A valve cover (2), wherein the valve cover (2) is arranged at the top end of the valve body (1), a valve stem (3) is arranged on the valve cover (2), a hand wheel (4) is arranged at the top end of the valve stem (3), and a valve flap (5) is arranged at the bottom end;

A valve seat (6), wherein the valve seat (6) is arranged in the fluid channel (100);

It is characterized by further comprising:

An impact-resistant section (7), the impact-resistant section (7) being arranged at one end of the valve body (1) and located at the inlet of the fluid channel (100), the impact-resistant section (7) being used to reduce the impact of the fluid on the valve disc (5);

A sealing portion (8), wherein the sealing portion (8) is arranged at the bottom end of the valve flap (5);

The sealing portion (8) can be in contact with the valve seat (6) to form a conventional seal and can cooperate with the valve seat (6) to perform an extrusion seal after the valve flap (5) is closed.

2. The anti-leakage stop valve according to claim 1, characterized in that the sealing portion (8) further comprises:

A sealing seat (80), wherein the sealing seats (80) are provided in a plurality and are distributed in an inverted cone shape from top to bottom, and adjacent sealing seats (80) are movably connected to each other;

A sealing ring (81), wherein the sealing ring (81) is arranged between adjacent sealing seats (80), and the outer diameter of the sealing ring (81) is greater than the diameter of the sealing seat (80).

3. The anti-leakage stop valve according to claim 2, characterized in that the sealing ring (81) further comprises:

A sealing ring (81) body, wherein a cavity (811) is provided in the lower half of the sealing ring (81) body;

Wherein, the cavity (811) is distributed and extends along the circumference of the sealing ring (81) body.

4. The anti-leakage stop valve according to claim 1, characterized in that the anti-shock section (7) further comprises:

An impact-resistant plate (70) is arranged in the impact-resistant section (7), the impact-resistant plate (70) is spherical, and holes (71) of different sizes are distributed on the impact-resistant plate (70).

5. The anti-leakage stop valve according to claim 1, characterized in that it also includes:

A sealing strip (9), wherein the sealing strip (9) is arranged between the valve cover (2) and the valve body (1) and is used for sealing the valve cover (2) and the valve body (1).