CN214838623U

CN214838623U - Swing type low-temperature check valve

Info

Publication number: CN214838623U
Application number: CN202121723316.5U
Authority: CN
Inventors: 金洪友
Original assignee: Jiangsu Weilan Valve Co ltd
Current assignee: Jiangsu Weilan Valve Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-11-23
Anticipated expiration: 2031-07-28

Abstract

The utility model discloses a swing type low temperature check valve, which comprises a valve body, wherein a cavity is arranged inside the valve body, one side of the cavity is provided with a medium inlet, the other side of the cavity is provided with a medium outlet, the top end of the valve body is provided with a valve cover, the inside of the valve body is provided with a pin shaft, the pin shaft is provided with a rotating arm, the inner side of the medium inlet is provided with a valve clack, one end of the rotating arm is provided with a threaded hole, the threaded hole is internally provided with a first bolt, the valve clack is fixedly arranged at one side of the rotating arm through the first bolt, one side of the valve clack is provided with a first sealing ring, a second sealing ring is arranged between the rotating arm and the valve clack, the top of the valve cover is embedded and provided with a control panel, the top of the valve cover is provided with a warning lamp, one side of the inside of the valve body is provided with a buffer block, one end of the spring is connected with a top block at an opening part close to the buffer block, has high practical value.

Description

Swing type low-temperature check valve

Technical Field

The utility model relates to a check valve technical field specifically is a swing formula low temperature check valve.

Background

The check valve is a valve whose opening and closing member is a circular valve flap and acts by self weight and medium pressure to block medium backflow, belonging to the automatic valve class, also called check valve, one-way valve, backflow valve or isolating valve, the valve flap motion mode is divided into lift type and swing type, the lift type check valve is similar to the structure of the stop valve, only lacks a valve rod for driving the valve flap, the medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side), when the inlet pressure is greater than the sum of the weight of the valve flap and the flow resistance thereof, the valve is opened, otherwise, the valve is closed when the medium flows backwards, the swing type check valve has a valve flap which is obliquely arranged and can rotate around a shaft, the working principle is similar to that of the lift type check valve, the check valve is used as a bottom valve of a common water pumping device, the backflow of water can be blocked, the fixed valve is combined with the stop valve, and the function of safety isolation can be achieved.

At present, the swing type low temperature check valve that uses in the market is when using, when the medium enters into the valve body inside through the medium import, because the impact force of medium is too big, when using for a long time, can lead to the damage of valve body to the life of valve body has been influenced, and current swing type low temperature check valve lacks safety device, when valve body pressure is too big, can lead to the damage of valve body, has the potential safety hazard. We have therefore developed this and have proposed a swing type cryogenic check valve.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to a swing type low temperature check valve, which comprises a valve body, wherein a cavity is arranged inside the valve body, one side of the cavity is provided with a medium inlet, the other side of the cavity is provided with a medium outlet, the top end of the valve body is provided with a valve cover, a pin shaft is arranged in the valve body, a rotating arm is arranged on the pin shaft, a valve clack is arranged on the inner side of the medium inlet, one end of the rotating arm is provided with a threaded hole, a first bolt is arranged in the threaded hole, the valve clack is fixedly arranged on one side of the rotating arm through the first bolt, a first sealing ring is arranged on one side of the valve clack, a second sealing ring is arranged between the rotating arm and the valve clack, a control panel is embedded and installed on the top of the valve cover, a warning lamp is arranged on the top of the valve cover, a buffer block is arranged on one side inside the valve body, the inside spring that is equipped with of buffer block, spring one end is connected with the kicking block at the opening part that is close to the buffer block.

As a preferred technical scheme of the utility model, the screw hole is all seted up in the valve gap four corners, all be equipped with the second bolt in the screw hole, the valve gap passes through second bolt fixed mounting at the valve body top.

As an optimal technical scheme of the utility model, valve clack external diameter slightly is greater than medium import opening internal diameter size, first sealing washer is laminated each other with the medium import.

As a preferred technical scheme of the utility model, be equipped with the third sealing washer between valve body and the valve gap, valve body top and valve gap bottom all are equipped with the recess, just third sealing washer block is in the recess.

As an optimized technical scheme of the utility model, first sealing washer, second sealing washer and third sealing washer all use low temperature material polytetrafluoroethylene to make.

As an optimal technical scheme of the utility model, the valve bonnet bottom is equipped with pressure sensor, pressure sensor and control panel signal connection.

As an optimal technical scheme of the utility model, medium import all is equipped with the mounting panel with medium outlet opening play, a plurality of mounting holes have all been seted up on the mounting panel.

The utility model has the advantages that:

1. the swing type low-temperature check valve is characterized in that the buffer block, the jacking block and the spring are matched for use, when a medium enters the valve body through the medium outlet, the rotating arm is arranged on the pin shaft, so that the valve clack is opened and closed, when the medium flow rate is too high, the rotating arm rotates upwards to be in contact with the jacking block, the jacking block plays a good role of buffering under the action of the spring, and the damage to the valve body caused by the too high swing of the rotating arm is prevented, so that the service life of the valve body is prolonged;

2. according to the swing type low-temperature check valve, the pressure sensor is arranged at the bottom of the valve cover and is in signal connection with the control panel, the internal pressure of the valve body is detected, when the pressure is too high, the warning lamp is arranged at the top of the valve cover, the warning to workers is realized, so that accidents are avoided, the safety of the valve body is improved, the first sealing ring, the second sealing ring and the third sealing ring are made of low-temperature polytetrafluoroethylene, and the polytetrafluoroethylene has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-adhesiveness, electric insulation property and good ageing resistance;

3. the swing type low-temperature check valve is fixedly arranged at the top of the valve body through the valve cover through the second bolt, so that the disassembly and the maintenance of workers are facilitated, and the installation and the fixation of the workers are facilitated by arranging the installation plate and the installation hole; the utility model has the advantages of simple and reasonable structure, the modern design, easy operation is convenient, can effectively improve the security of this valve body, has higher practical value.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a perspective view of a swing type low temperature check valve of the present invention;

fig. 2 is a cross-sectional view of a swing type low temperature check valve of the present invention;

fig. 3 is an enlarged schematic view of a structure in fig. 2 of a swing type low temperature check valve of the present invention.

In the figure: 1. a valve body; 2. a media inlet; 3. a media outlet; 4. a valve cover; 5. a pin shaft; 6. a rotating arm; 7. a valve flap; 8. a first bolt; 9. a first seal ring; 10. a second seal ring; 11. a third seal ring; 12. a buffer block; 13. a top block; 14. a spring; 15. a second bolt; 16. a pressure sensor; 17. mounting a plate; 18. a warning light; 19. a control panel; 20. and (7) installing holes.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in figures 1-3, the utility model relates to a swing type low temperature check valve, which comprises a valve body 1, a cavity is arranged inside the valve body 1, a medium inlet 2 is arranged at one side of the cavity, a medium outlet 3 is arranged at the other side of the cavity, a valve cover 4 is arranged at the top end of the valve body 1, a pin shaft 5 is arranged inside the valve body 1, a rotating arm 6 is arranged on the pin shaft 5, a valve flap 7 is arranged at the inner side of the medium inlet 2, a threaded hole is arranged at one end of the rotating arm 6, a first bolt 8 is arranged in the threaded hole, the valve flap 7 is fixedly arranged at one side of the rotating arm 6 through the first bolt 8, a first sealing ring 9 is arranged at one side of the valve flap 7, a second sealing ring 10 is arranged between the rotating arm 6 and the valve flap 7, a control panel 19 is embedded at the top of the valve cover 4, a warning lamp 18 is arranged at the top of the valve cover 4, a buffer block 12 is arranged at one side inside the valve body 1, a spring 14 is arranged inside the buffer block 12, and one end of the spring 14 is connected with a top block 13 at an opening close to the buffer block 12.

Threaded holes are formed in four corners of the valve cover 4, second bolts 15 are arranged in the threaded holes, and the valve cover 4 is fixedly installed at the top of the valve body 1 through the second bolts 15.

The outer diameter of the valve flap 7 is slightly larger than the inner diameter of the opening of the medium inlet 2, and the first sealing ring 9 is attached to the medium inlet 2.

Wherein, be equipped with third sealing washer 11 between valve body 1 and the

valve gap

4, 1 top of valve body and valve gap 4 bottom all are equipped with the recess, just third sealing washer 11 block is in the recess.

The first sealing ring 9, the second sealing ring 10 and the third sealing ring 11 are all made of low-temperature polytetrafluoroethylene.

Wherein, the bottom of the valve cover 4 is provided with a pressure sensor 16, and the pressure sensor 16 is in signal connection with a control panel 19.

The medium inlet 2 and the medium outlet 3 are provided with mounting plates 17, and the mounting plates 17 are provided with a plurality of mounting holes 20.

The working principle is as follows: before the valve body 1 is used, the integrity of each part is checked firstly, the valve body 1 is installed and fixed through the installation plate 17 and the installation hole 20, the buffer block 12, the top block 13 and the spring 14 are matched for use, when a medium enters the valve body 1 through the medium outlet 3, the rotating arm 6 is installed on the pin shaft 5 to realize the opening and closing of the valve clack 7, when the medium flow rate is too high, the rotating arm 6 rotates upwards to be in contact with the top block 13, the top block 13 is well buffered under the action force of the spring 14, the damage to the valve body 1 caused by the fact that the rotating arm 6 swings too fast is prevented, the service life of the valve body 1 is prolonged, the pressure sensor 16 is arranged at the bottom of the valve cover 4, the pressure sensor 16 is in signal connection with the control panel 19, the detection of the internal pressure of the valve body 1 is realized, when the pressure is too high, the warning lamp 18 is arranged at the top of the valve cover 4, the warning to the staff has been realized, thereby the emergence of accident has been avoided, this valve body 1's security has been increased, through first sealing washer 9, second sealing washer 10 and third sealing washer 11 all use the low temperature material polytetrafluoroethylene to make, the polytetrafluoroethylene has good chemical stability, corrosion resistance, leakproofness, high lubricated inadhesion nature, electrical insulation and good ageing resistance, passes through second bolt 15 fixed mounting at valve body 1 top through valve gap 4, has made things convenient for staff's dismantlement and maintenance, the utility model has the advantages of simple and reasonable structure, the modern design, easy operation is convenient, can effectively improve the security of this valve body, has higher practical value.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

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 described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The swing type low-temperature check valve comprises a valve body (1) and is characterized in that a cavity is arranged inside the valve body (1), a medium inlet (2) is formed in one side of the cavity, a medium outlet (3) is formed in the other side of the cavity, a valve cover (4) is arranged on the top end of the valve body (1), a pin shaft (5) is arranged inside the valve body (1), a rotating arm (6) is arranged on the pin shaft (5), a valve clack (7) is arranged on the inner side of the medium inlet (2), a threaded hole is formed in one end of the rotating arm (6), a first bolt (8) is arranged in the threaded hole, the valve clack (7) is fixedly installed on one side of the rotating arm (6) through the first bolt (8), a first sealing ring (9) is arranged on one side of the valve clack (7), a second sealing ring (10) is arranged between the rotating arm (6) and the valve clack (7), and a control panel (19) is installed on the top of the valve cover (4), valve gap (4) top is equipped with warning light (18), the inside one side of valve body (1) is equipped with buffer block (12), inside spring (14) that is equipped with of buffer block (12), spring (14) one end is connected with kicking block (13) at the opening part that is close to buffer block (12).

2. The swing type low-temperature check valve according to claim 1, wherein four corners of the valve cover (4) are provided with threaded holes, the threaded holes are provided with second bolts (15), and the valve cover (4) is fixedly mounted at the top of the valve body (1) through the second bolts (15).

3. The swing type low-temperature check valve as claimed in claim 1, wherein the outer diameter of the valve flap (7) is slightly larger than the inner diameter of the opening of the medium inlet (2), and the first sealing ring (9) is attached to the medium inlet (2).

4. The swing type low-temperature check valve according to claim 1, wherein a third sealing ring (11) is arranged between the valve body (1) and the valve cover (4), grooves are formed in the top of the valve body (1) and the bottom of the valve cover (4), and the third sealing ring (11) is clamped in the grooves.

5. A swing type low temperature check valve according to claim 4, characterized in that the first sealing ring (9), the second sealing ring (10) and the third sealing ring (11) are all made of low temperature material PTFE.

6. The swing type low-temperature check valve according to claim 1, wherein a pressure sensor (16) is arranged at the bottom of the valve cover (4), and the pressure sensor (16) is in signal connection with a control panel (19).

7. The swing type low-temperature check valve according to claim 1, wherein the medium inlet (2) and the medium outlet (3) are provided with mounting plates (17) respectively, and the mounting plates (17) are provided with a plurality of mounting holes (20).