CN211649182U

CN211649182U - Lift type slowly-closed silencing check valve

Info

Publication number: CN211649182U
Application number: CN202020044764.1U
Authority: CN
Inventors: 王成国; 梁素芳; 王博文; 董瑞鹏; 王宝瑞; 马伟格
Original assignee: Yuanda Vavle Group Co ltd
Current assignee: Yuanda Vavle Group Co ltd
Priority date: 2019-08-09
Filing date: 2020-01-09
Publication date: 2020-10-09
Anticipated expiration: 2030-01-09
Also published as: CN111075965A

Abstract

The utility model discloses an over-and-under type slowly closes amortization check valve, which comprises a valve body, set up in the valve gap on valve body upper portion, set up in the entrance point and the exit end at valve body both ends, set up disk seat between entrance point and exit end and set up in the valve body with the disk seat valve clack of mutually supporting, the upper end of valve clack is provided with the stay tube, the stay tube overcoat has cup jointed the direction valve clack lid, the through-hole has been seted up at direction valve clack lid top, the top is equipped with the uide bushing with direction valve clack lid looks adaptation in the valve gap, be provided with the lead screw in the uide bushing, the upper end of direction valve clack lid is inserted and is located in the uide bushing. The utility model discloses greatly reduced the sealed face of valve clack and the sealed face of disk seat impact force and impact sound to and greatly reduced the probability that the sealed face of valve clack and the sealed face of disk seat's striking damaged, prolonged the life of check valve.

Description

Lift type slowly-closed silencing check valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to an over-and-under type slowly closes amortization check valve.

Background

The check valve is widely used on pipelines under various working conditions in petroleum, chemical industry, pharmacy, chemical fertilizer, electric power industry and the like, and the used media are water, oil products, steam, chemical media (liquid or gas) and the like. The valve clack of the widely applied lifting check valve in the market at present does accelerated vertical linear motion to close the valve under the action of spring force, the gravity of the valve clack and medium force of backflow, so that the impact force between the sealing surface of the valve clack and the sealing surface of the valve body of the traditional check valve is larger, the noise ratio is larger, the sealing pair formed by the sealing surface of the valve clack and the sealing surface of the valve body is easy to damage due to the impact of large force, the non-return sealing performance of the traditional check valve is caused to fail, and the service life is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a not enough to above-mentioned prior art, provide a amortization check valve is slowly closed to over-and-under type.

In order to solve the above problems, the utility model adopts the following technical proposal:

the utility model provides an over-and-under type slowly closes amortization check valve, include the valve body, set up in valve gap on valve body upper portion, set up respectively in the entrance point and the exit end at valve body both ends, set up in disk seat between entrance point and the exit end and set up in the valve body with the valve clack that the disk seat was mutually supported, the upper end of valve clack is provided with the stay tube, the stay tube overcoat has been cup jointed the direction valve clack lid, the through-hole has been seted up at direction valve clack lid top, the top be equipped with in the valve gap with the uide bushing of direction valve clack lid looks adaptation, be provided with the lead screw in the uide bushing, the upper end of direction valve clack lid is inserted and is located in the uide bushing, the lower extreme of lead screw passes be provided.

Furthermore, a spherical pad is arranged between the upper end of the nut and the guide valve clack cover.

Further, the guide valve clack cover is in clearance fit with the guide sleeve.

Furthermore, the guide valve clack cover is connected with the supporting tube through a pin shaft and a split pin.

Further, the inner diameter of the supporting tube is larger than the outer diameter of the screw rod.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model discloses the sharp free fall motion improvement of accelerating when closing traditional lift check valve's valve clack is quick helical motion, has greatly reduced the impact force and the impact sound of the sealed face of valve clack and the sealed face of disk seat to and the probability that the striking of the sealed face of valve clack and the sealed face of disk seat damaged has greatly been reduced, has prolonged check valve's life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a valve body; 2. a valve cover; 3. an inlet end; 4. an outlet end; 5. a valve seat; 6. a valve flap; 7. supporting a tube; 8. a guide valve flap cover; 9. a guide sleeve; 10. a lead screw; 11. a nut; 12. a spherical pad; 13. a pin shaft; 14. and a cotter pin.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1, the present invention relates to a specific embodiment of a lift slow-closing silencing check valve, which includes a valve body 1, a valve cover 2 disposed on the upper portion of the valve body 1 through a stud bolt and a hexagon nut, an inlet end 3 and an outlet end 4 respectively disposed at two ends of the valve body 1, a valve seat 5 disposed between the inlet end 3 and the outlet end 4, and a valve flap 6 disposed in the valve body 1 and cooperating with the valve seat 5, wherein a support tube 7 is disposed at the upper end of the valve flap 6, a guide valve flap cover 8 is sleeved outside the support tube 7, the valve flap cover 8 is a tube body with an open lower end, the guide valve flap cover 8 is connected with the support tube 7 through a pin 13 and a cotter pin 14, and the pin is prevented from vibrating and slipping to cause the valve; the valve comprises a valve cover and is characterized in that a through hole is formed in the top of a guide valve clack cover 8, a guide sleeve 9 matched with the guide valve clack cover 8 is arranged at the top in the valve cover 2, a lead screw 10 is arranged in the guide sleeve 9, the upper end of the guide valve clack cover 8 is inserted into the guide sleeve 9, the guide valve clack cover 8 is in clearance fit with the guide sleeve 9, a nut 11 is arranged after the lower end of the lead screw 10 penetrates through the through hole in the guide valve clack cover 8, the lead screw 10 is connected with the nut 11 through non-self-locking threads, and the lower end of the nut 11 is abutted to the. When the valve clack 6 is forced to move upwards, the support pipe 7 pushes the nut 11 to spirally rise along the screw rod 10, and when the force is removed, the guide valve clack cover 8 drives the nut 11 to spirally fall along the screw rod 10 under the action of the gravity of the valve clack 6.

Further, a spherical pad 12 is arranged between the upper end of the nut 11 and the guide valve clack cover 8. The spherical pad 12 is arranged to have an angle fine adjustment function, the spherical pad 12 and the nut 11 are not pressed by the guide valve clack cover 8, certain gaps are formed in the axial direction and the radial direction of the spherical pad, the matching angle between the sealing surface of the valve clack 6 and the sealing surface of the valve seat 5 can be finely adjusted when the valve clack 6 moves up and down, the difficulty that the sealing surface of the valve clack 2 and the sealing surface of the valve seat 5 are parallel to each other during assembly is reduced, and the parallel matching sealing function of a sealing pair (the sealing surface of the valve seat 5 and the sealing surface of the valve clack 6) is.

Further, the inner diameter of the support tube 7 is larger than the outer diameter of the screw rod 10, so that when the valve clack 6 and the support tube 7 push the nut 11 to spirally rise along the screw rod 10, the lower end of the screw rod 10 can be conveniently inserted into the support tube 7.

The working principle is as follows:

when the pressure at the inlet end is higher than that at the outlet end, a medium enters the valve from the inlet end, the valve clack 6 is pushed upwards by the force of the medium, meanwhile, the valve clack 6 pushes the nut 11 to make spiral rising movement along the screw rod 10, at the moment, the check valve is opened, the medium flows to the medium outlet end from the lower part of the valve clack 6, and a pipeline is in a connection state.

When the pressure of the pipeline is unstable, the pressure at the outlet end is greater than the pressure at the inlet end, the medium flows backwards, and equipment or devices of the pipeline at the upstream of the medium can be damaged or even serious accidents can be caused. For this reason, the lift type slow-closing silencing check valve must cut off reverse medium flow in time to ensure the safety of equipment or devices of an upstream pipeline. Under the action of reverse medium force and the self-gravity of a valve clack component, the valve clack 6 of the lift type slow-closing silencing check valve presses a nut 11 downwards under a guide valve clack cover 8 and rapidly moves downwards along the spiral line direction of a lead screw 10, and the reverse flow of a pipeline medium is rapidly cut off. Because the nut 11 moves downwards along the spiral line of the screw rod 6, the impact force of the valve clack 6 for closing the valve is greatly reduced, so that the valve clack 6 of the lifting slow-closing silencing check valve can rapidly and reliably cut off the medium flow flowing reversely through the pipeline under the action of small closing force; meanwhile, due to the small impact force when the valve clack 6 is closed, the impact sound is reduced, the damage rate of the sealing surface of the valve clack 6 and the sealing surface of the valve seat 5 is greatly reduced, and the service life of the lift type slow-closing silencing check valve is greatly prolonged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A lifting slow-closing silencing check valve comprises a valve body (1), a valve cover (2) arranged on the upper portion of the valve body (1), an inlet end (3) and an outlet end (4) which are respectively arranged at two ends of the valve body (1), a valve seat (5) arranged between the inlet end (3) and the outlet end (4), and a valve clack (6) arranged in the valve body (1) and matched with the valve seat (5), and is characterized in that a supporting pipe (7) is arranged at the upper end of the valve clack (6), a guide valve clack cover (8) is sleeved outside the supporting pipe (7), a through hole is arranged at the top of the guide valve clack cover (8), a guide sleeve (9) matched with the guide valve clack cover (8) is arranged at the inner top of the valve cover (2), a lead screw (10) is arranged in the guide sleeve (9), and the upper end of the guide valve clack cover (8, the lower end of the screw rod (10) penetrates through a through hole in the guide valve clack cover (8) and then is provided with a nut (11), the screw rod (10) and the nut (11) are in non-self-locking threaded connection, and the lower end of the nut (11) is abutted to the upper end of the support pipe (7).

2. The lift type slow-closing silencing check valve as claimed in claim 1, wherein a ball-shaped pad (12) is provided between the upper end of the nut (11) and the pilot flap cover (8).

3. The lift slow-closing silencing check valve of claim 1, wherein the guide flap cover (8) is in clearance fit with the guide sleeve (9).

4. The lift slow-closing silencing check valve of claim 1, characterized in that the guide flap cover (8) is connected to the support tube (7) by a pin (13) and a cotter pin (14).

5. The lift type slow-closing silencing check valve as claimed in claim 1, wherein the inner diameter of the support tube (7) is larger than the outer diameter of the screw (10).