CN210106689U

CN210106689U - Lift check valve device

Info

Publication number: CN210106689U
Application number: CN201920998289.9U
Authority: CN
Inventors: 林时庆; 贺乐全; 刘明杰; 谷成明; 袁俊峰; 陈卓松
Original assignee: Huanqiu Valve Group Co Ltd
Current assignee: Huanqiu Valve Group Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-02-21
Anticipated expiration: 2029-06-29

Abstract

The utility model discloses an over-and-under type check valve device, including valve body, valve clack and valve gap, the valve clack is placed on the non return hole at valve body middle part, and the valve clack middle part is connected with the guide bar, and the guide bar upper end is fixed with the piston, and the piston upper end has the split ring through the fix with screw, and valve body middle part upper end is provided with columniform valve body installation pipeline, the valve gap below is provided with the piston chamber, and piston chamber lower extreme has the gland through the bolt fastening, and the gland parcel is in the guide bar outside. The lift check valve device has the advantages that the inclination is processed on the valve clack guide rod, when the valve clack is closed, along with the descending of the stroke, the sectional area of a gap between the valve clack guide rod and the guide sleeve is reduced, the sectional area of a lower cylinder body of the stroke between the valve cover and the piston is larger than that of the gap between the valve clack guide rod and the guide sleeve, the valve closing speed is slowed down due to the unchanged medium volume, certain damping is formed, and the noise generated by the closing of the valve and the vibration of a pipeline are reduced.

Description

Lift check valve device

Technical Field

The utility model relates to a check valve technical field specifically is a lift check valve device.

Background

The lifting check valve is a valve which relies on medium to flow to automatically open and close the valve clack for preventing medium backflow, and belongs to an automatic valve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem lie in overcoming present over-and-under type check valve and all rely on the valve clack dead weight and medium pressure to close the valve, and medium effort is big when closing, and speed is very fast when the valve clack is closed, causes very big damage to sealed face, especially heavy-calibre lift check valve, because the valve clack not only causes the damage to sealed face when closing greatly, and vibration and noise are big when closing moreover, to the unfavorable problem of pipeline.

In order to achieve the above object, the utility model provides a following technical scheme: a lifting check valve device comprises a valve body, a valve clack and a valve cover, wherein the valve clack is placed on a check hole in the middle of the valve body, the middle of the valve clack is connected with a guide rod, the upper end of the guide rod is fixedly provided with a piston, an O-shaped rubber ring is arranged on the outer side of the piston, the upper end of the piston is fixedly provided with a split ring through a screw, the upper end of the middle of the valve body is provided with a cylindrical valve body installation pipeline, the valve cover is fixedly arranged on the valve body installation pipeline through a bolt, and;

the piston cavity is arranged below the valve cover, the piston is installed inside the piston cavity in a sliding mode, the lower end of the piston cavity is fixedly provided with a gland through a bolt, the guide sleeve is arranged inside the gland, the gland wraps the outer side of the guide rod, and the gland and the guide sleeve are fixed together through the bolt.

Preferably, the valve clack and the guide rod are integrally welded and connected into a whole.

Preferably, the guide sleeve is embedded into the gland and fixed, the middle of the guide sleeve is provided with a hole, a gap is reserved between the guide sleeve and the gland, and the bottom of the gland is drilled and is communicated with the gap between the guide sleeve and the gland.

Preferably, a supporting spring is fixed on the valve clack on the outer side of the guide rod, the supporting spring is sleeved on the outer side of the guide rod, the upper end of the supporting spring is fixed on the piston cavity, a piston fixed at the upper end of the guide rod can slide in the piston cavity, and the piston cavity at the lower end of the valve cover are in clearance fit to form a hydraulic cylinder body through an O-shaped rubber ring in a sealing mode.

Preferably, a guide rod groove with an inclination is machined in the guide sleeve at the contact part of the guide rod and the guide sleeve, and an inclination of 2-3 degrees is machined in the contact middle 1/2 of the guide rod and the guide sleeve.

Preferably, the non-return hole sealing gasket made of rubber is arranged on the outer side of the upper portion of the non-return hole, the valve clack sealing gasket made of rubber is fixed on the valve clack above the non-return hole sealing gasket, and the valve clack sealing gasket can be placed on the non-return hole sealing gasket.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the valve clack guide rod is provided with an inclination, the sectional area of a gap between the valve clack guide rod and the guide sleeve is reduced along with the descending of a stroke when the valve clack is closed, the sectional area of a lower cylinder body of the stroke between the valve cover and the piston is larger than that of the gap between the valve clack guide rod and the guide sleeve, and the valve closing speed is slowed down due to the unchanged volume of a medium to form certain damping, so that the valve cannot generate extremely fast impact at the closing moment, the sealing surface of the valve is protected, and the noise generated by the closing of the valve and the vibration to a pipeline are;

2. a valve clack sealing gasket made of rubber is arranged below the valve clack, and a non-return hole sealing gasket is arranged on a valve body connected with the valve clack to form sealing, so that the effect of reducing collision is achieved, the damage to a pipeline is reduced, and the service life of equipment is prolonged;

3. the upper end of the valve clack guide rod is provided with a piston, and the piston can slide in a piston cavity to improve the buffering effect.

Drawings

Fig. 1 is a schematic expanded view of the structure of the present invention;

FIG. 2 is an enlarged schematic view of the installation of the valve flap of the structure of the present invention;

FIG. 3 is a schematic view of the structure of the present invention in a closed state;

fig. 4 is a schematic view of the structure opening state of the present invention.

Reference numbers in the figures: 1. a valve body; 2. a valve flap; 3. a guide sleeve; 4. a gland; 5. a piston; 6. an O-shaped rubber ring; 7. a screw; 8. opening the ring; 9. a valve cover; 10. a pull ring; 11. the valve body is provided with a pipeline; 12. a piston cavity; 13. a guide bar; 14. a support spring; 15. a non-return hole; 16. a valve flap seal gasket; 17. a non-return hole sealing gasket; 18. a guide bar groove.

Detailed Description

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

Referring to fig. 1-4, the present invention provides a technical solution: a lifting check valve device comprises a valve body 1, a valve clack 2 and a valve cover 9, wherein the valve clack 2 is placed on a check hole 15 in the middle of the valve body 1, the middle of the valve clack 2 is connected with a guide rod 13, the valve clack 2 and the guide rod 13 are integrally welded and connected into a whole, a piston 5 is fixed at the upper end of the guide rod 13, an O-shaped rubber ring 6 is arranged on the outer side of the piston 5, a supporting spring 14 is fixed on the valve clack 2 on the outer side of the guide rod 13, the supporting spring 14 is sleeved on the outer side of the guide rod 13, the upper end of the supporting spring 14 is fixed on a piston cavity 12, the piston 5 fixed at the upper end of the guide rod 13 can slide in the piston cavity 12, the piston 5 and the piston cavity 12 at the lower end of the valve cover 9 are in clearance fit to form a hydraulic cylinder body by the O-shaped rubber ring 6, a guide rod groove 18 with inclination is processed on the guide sleeve 3 at the contact, the upper end of a piston 5 is fixed with a split ring 8 through a screw 7, the upper end of the middle part of a valve body 1 is provided with a cylindrical valve body installation pipeline 11, the valve body installation pipeline 11 is fixed with a valve cover 9 through a bolt, the middle part of the valve cover 9 is screwed with a pull ring 10, a piston cavity 12 is arranged below the valve cover 9, the piston cavity 12 is internally provided with a sliding installation piston 5, the lower end of the piston cavity 12 is fixed with a gland 4 through a bolt, the gland 4 is internally provided with a guide sleeve 3, the guide sleeve 3 is embedded into and fixed with the gland 4, the middle part of the guide sleeve 3 is provided with a hole, a gap is arranged between the guide sleeve 3 and the gland 4, a drilling hole at the bottom of the gland 4 is communicated with the gap between the guide sleeve 3 and the gland 4, the gland 4 is wrapped outside a guide rod 13, the gland 4 and the guide sleeve 3 are fixed together through a bolt, a non-return hole sealing gasket 17 made, and the flap seal 16 may be placed on the check hole seal 17.

When the lift check valve device is used, the valve body 1 is firstly installed on a pipeline, the pressure of medium flowing inside the pipeline pushes the valve clack 2 to move upwards to form a passage, when the backflow pressure of the internal medium is greater than the inlet pressure, backflow is formed, and under the action of the elastic force of the supporting spring 14 and the gravity of the valve clack 2, the backflow moves downwards to enable the valve clack sealing gasket 16 below the valve clack 2 to be pressed on the check hole sealing gasket 17, which is the whole process of the work of the lift check valve device.

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

Claims

1. The utility model provides an over-and-under type check valve device, includes valve body (1), valve clack (2) and valve gap (9), its characterized in that: the valve clack (2) is placed on a check hole (15) in the middle of the valve body (1), the middle of the valve clack (2) is connected with a guide rod (13), a piston (5) is fixed at the upper end of the guide rod (13), an O-shaped rubber ring (6) is arranged on the outer side of the piston (5), a split ring (8) is fixed at the upper end of the piston (5) through a screw (7), a cylindrical valve body installation pipeline (11) is arranged at the upper end of the middle of the valve body (1), a valve cover (9) is fixed on the valve body installation pipeline (11) through a bolt, and a pull ring (10) is screwed in the middle of the valve;

valve gap (9) below is provided with piston chamber (12), and piston chamber (12) internally mounted slidable mounting piston (5), and piston chamber (12) lower extreme is fixed with gland (4) through the bolt, and gland (4) inside is provided with uide bushing (3), and gland (4) parcel is in the guide bar (13) outside, and gland (4) and uide bushing (3) pass through the bolt fastening and be in the same place.

2. The poppet check valve assembly of claim 1, wherein: the valve clack (2) and the guide rod (13) are integrally welded and connected into a whole.

3. The poppet check valve assembly of claim 1, wherein: the guide sleeve (3) is embedded into the gland (4) and fixed, the middle of the guide sleeve (3) is provided with a hole, a gap is reserved between the guide sleeve (3) and the gland (4), and the bottom of the gland (4) is drilled and is communicated with the gap between the guide sleeve (3) and the gland (4).

4. The poppet check valve assembly of claim 1, wherein: a supporting spring (14) is fixed on the valve clack (2) on the outer side of the guide rod (13), the supporting spring (14) is sleeved on the outer side of the guide rod (13), the upper end of the supporting spring (14) is fixed on the piston cavity (12), the upper end of the guide rod (13) is fixed on a piston (5) and can slide in the piston cavity (12), and the piston (5) and the piston cavity (12) at the lower end of the valve cover (9) are in clearance fit to form a hydraulic cylinder body in a sealed mode through an O-shaped rubber ring (6).

5. The poppet check valve assembly of claim 1, wherein: a guide rod groove (18) with inclination is machined in the guide sleeve (3) at the contact position of the guide rod (13) and the guide sleeve (3), and 2-3-degree inclination is machined at the contact middle 1/2 position of the guide rod (13) and the guide sleeve (3).

6. The poppet check valve assembly of claim 1, wherein: the sealing gasket (17) is arranged on the outer side of the upper portion of the non-return hole (15) and made of rubber, the sealing gasket (16) is fixed on the valve clack (2) above the sealing gasket (17) and made of rubber, and the sealing gasket (16) can be placed on the sealing gasket (17) made of the non-return hole.