CN215861903U

CN215861903U - Axial flow type check valve

Info

Publication number: CN215861903U
Application number: CN202122319729.3U
Authority: CN
Inventors: 邓越健; 魏一民
Original assignee: Sichuan Grv Flow Controls Co ltd
Current assignee: Sichuan Grv Flow Controls Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-02-18
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses an axial flow check valve, relates to the field of check valves, and is mainly used for solving the problems that the sealing performance of the valve is obviously reduced and the replacement cost is high due to the fact that a guide rod and a guide sleeve in the axial flow check valve are abraded too fast. According to the utility model, the bushing is arranged between the air guide sleeve and the guide rod, so that the relative abrasion between the air guide sleeve and the guide rod is avoided, and although the bushing and the guide rod are still abraded, the abrasion degree is smaller and the abrasion speed is slower than before, so that the sealing property of the valve can be kept in a good state for a long time, and the service life is longer; and the overall cost is lower when the guide bar and bushing are replaced.

Description

Axial flow type check valve

Technical Field

The utility model belongs to the field of check valves, and particularly relates to an axial flow type check valve.

Background

The axial flow type check valve is one of check valves, is widely applied to conveying pipeline systems of oil, gas, water slurry, acidic corrosive media and the like, is used for preventing media from flowing backwards, and can play a role in eliminating noise and vibration and reducing water hammer effect compared with a common check valve.

At present, the main structure of an axial flow check valve in the prior art includes a valve body, a dome, a valve flap, a spring, etc., wherein the dome is fixedly disposed in a valve cavity of the valve body, the valve flap and the dome are connected to each other through the spring, and in order to keep the valve flap axially moving all the time, a guide rod is disposed at one end of the valve flap away from an inlet of the valve, and the guide rod is matched with the dome to achieve the purpose of guiding.

When the valve inlet is opened and closed every time, namely the valve clack axially reciprocates, the guide rod and the air guide sleeve relatively move, so that the guide rod and the air guide sleeve are greatly abraded, the valve clack cannot axially move, the sealing performance of the valve is further quickly reduced, the normal work of the valve is influenced, and the service life is extremely short; when the valve cannot work normally due to abrasion of the guide cover and the guide rod, the guide cover and the guide rod need to be replaced at the same time, so that the replacement cost is high, and the performance cost is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an axial flow check valve which can avoid the rapid abrasion between a guide rod and a guide cover, prolong the service life of the valve and reduce the replacement cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an axial flow check valve comprises a valve body, a valve clack and a flow guide cover, wherein a valve cavity extending to two ends along the axial direction is arranged in the valve body, one end of the valve clack is matched with a valve inlet, the other end of the valve clack is fixedly connected with a guide rod, and the guide rod axially penetrates through the flow guide cover; the guide cover is fixed in the valve cavity, a through hole for the guide rod to pass through is axially arranged on the guide cover, and a bushing is arranged between the guide rod and the guide cover.

Furthermore, one end of the bushing, which is close to the valve outlet, is provided with a flange, and the flange is embedded into the flow guide cover.

Furthermore, the bushing and the air guide sleeve are in interference fit, and the bushing and the guide rod are in clearance fit.

Furthermore, the valve seat is welded on the inner wall of the valve body close to the valve inlet and is matched with the valve clack.

Furthermore, the valve seat and the valve clack are both provided with corresponding sealing surfaces, and the sealing surfaces are provided with sealing gaskets.

Furthermore, the end face of the valve clack close to the valve inlet is a spherical cambered surface.

Furthermore, the inside arch that is equipped with around the bush of kuppe, be equipped with corresponding mounting groove on the bellied terminal surface and the valve clack terminal surface of keeping away from the valve entry.

Further, still include the spring, the both ends of spring are installed respectively in the installation groove on the inside arch of kuppe and valve clack.

The valve further comprises a valve sleeve, the valve sleeve is connected to the inner wall of the valve body at the valve outlet through threads, and the valve sleeve is connected with the flow guide cover through a plurality of rib plates.

Furthermore, at least one breathing hole is formed in the air guide sleeve.

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

1. according to the utility model, the bushing is arranged between the air guide sleeve and the guide rod, so that direct relative abrasion between the air guide sleeve and the guide rod is avoided, although the bushing and the guide rod are still abraded, the abrasion degree is smaller and the speed is slower than before, the sealing performance of the valve can be kept in a good state for a long time, and the service life is longer; and the total cost when replacing the guide bar and the bush is lower than before; the friction coefficient of the inner side wall of the bushing is small, so that the valve clack can drive the guide rod to axially move at a higher response speed.

2. The one end that is close to the valve export on the bush outer wall is equipped with the flange, and flange embedding kuppe can guarantee the relatively fixed of bush and kuppe, avoids after long-time work, and the bush takes place to drop under the effect of axial force, influences the direction of valve clack.

3. The bush is connected with the air guide sleeve in an interference fit manner, so that the bush cannot move when the valve clack drives the guide rod to move axially; the bush and the guide rod are in clearance fit, so that the valve clack can smoothly drive the guide rod to axially move, and the blocking phenomenon cannot occur.

4. The valve seat is arranged at the inlet of the valve, and is matched with the valve clack, so that the direct contact between the valve clack and the valve body can be avoided, the valve clack is prevented from impacting the valve body under the action of axial force when the valve clack is closed, the valve body is damaged, and the service life is prolonged.

5. All be equipped with corresponding sealed face on disk seat and the valve clack, still be equipped with seal gasket on the sealed face for both can the flexonics, can not only make the leakproofness between disk seat and the valve clack better, can also play the effect of buffering when the valve clack strikes.

6. The end face of the valve clack close to the valve inlet is a spherical cambered surface, so that the abrasion loss can be circumferentially compensated when the valve clack and the valve seat are abraded for a certain time, the valve can keep good sealing performance for a long time, and the replacement cost is reduced.

7. The two ends of the spring are respectively arranged in the installation grooves of the inner bulge of the air guide sleeve and the valve clack, so that the valve clack can be limited to move axially in a short stroke, and the response speed of closing the valve inlet is higher.

8. The valve sleeve is connected to the inner wall of the valve body at the valve outlet through threads, and the valve sleeve not only can protect the inner wall of the valve body, but also can enable the device to be easily disassembled and assembled; the valve pocket is connected with the air guide sleeve through the rib plates, the rib plates can divide the valve pocket into a plurality of air guide channels, the stable air guide effect on a conveying medium can be achieved by matching with the streamline design of the outer wall of the air guide sleeve, the air guide sleeve can be guaranteed to be fixed in the valve pocket, the guide rod can always keep moving axially, abrasion is reduced, and the service life is prolonged.

9. The flow guide cover is provided with at least one breathing hole, and when the valve inlet is opened, a conveying medium can also enter the inner cavity of the flow guide cover through the breathing hole in the circulating process, so that the valve clack is pushed to the valve seat by matching with the elastic force of the spring when the valve clack closes the valve inlet, and the response speed of closing the valve inlet is higher.

Drawings

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

Wherein, 1-valve body; 2-valve inlet; 3-valve clack; 4-valve seat; 5-valve cavity; 6-a flow guide cover; 7-a rib plate; 8-valve sleeve; 9-mounting grooves; 10-valve outlet; 11-a liner; 12-a breathing hole; 13-a spring; 14-a guide bar; 15-a sealing gasket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The axial flow type check valve shown in fig. 1 comprises a valve body 1, a valve clack 3 and a flow guide cover 6, wherein a valve cavity 5 extending to two ends along the axial direction is arranged in the valve body 1, and the two ends of the valve cavity 5 are thin and the middle is thick; one end of the valve clack 3 is matched with the valve inlet 2, and the other end is fixedly connected with a guide rod 14; the guide rod 14 axially penetrates through the air guide sleeve 6; the air guide sleeve 6 is bowl-shaped, round at the front and sharp at the back, the outer side wall adopts a streamline design and is fixed in the valve cavity 5, and the air guide sleeve 6 is axially provided with a through hole for the guide rod 14 to pass through; a bush 11 is arranged between the guide rod 14 and the air guide sleeve 6. The device can avoid direct relative abrasion of the guide cover 6 and the guide rod 14, and although abrasion still exists between the bushing 11 and the guide rod 14, the abrasion degree is smaller and the abrasion speed is slower than the prior abrasion degree, so that the sealing performance of the valve can be kept in a good state for a long time, and the service life is longer; the overall cost is lower when the guide bar 14 and the bush 11 are replaced; the friction coefficient of the inner side wall of the bush 11 is small, so that the response speed is higher when the valve clack 3 drives the guide rod 14 to axially move.

The flange is arranged at one end, close to the valve outlet 10, of the outer wall of the bushing 11 and is embedded into the air guide sleeve 6, so that relative fixation between the bushing 11 and the air guide sleeve 6 can be guaranteed, and the phenomenon that the bushing 11 falls off under the action of axial force to influence the guiding of the valve clack 3 in long-time work is avoided.

The bush 11 is connected with the air guide sleeve 6 in an interference fit manner, so that the bush 11 cannot move when the valve clack 3 drives the guide rod 14 to move axially; the bush 11 and the guide rod 14 are in clearance fit, so that the valve clack 3 can smoothly drive the guide rod 14 to axially move, and the phenomenon of blocking cannot occur.

The valve seat 4 is arranged at the valve inlet 2 and is matched with the valve clack 3, so that the valve clack 3 can be prevented from being in direct contact with the valve body 1, and the valve clack 3 is prevented from impacting the valve body 1 under the action of axial force to damage the valve body 1 and the valve body 1 when the valve inlet 2 is closed by the valve clack 3.

All be equipped with corresponding sealed face on disk seat 4 and valve clack 3, still be equipped with seal gasket 15 on the sealed face for disk seat 4 and valve clack 3 can the flexonics, can not only make the leakproofness between the two better, can also play the effect of buffering when closing valve entry 2.

Wherein, the valve clack 3 is the spherical cambered surface near the one side of valve entry 2, can be when certain wearing and tearing take place for valve clack 3 and disk seat 4 circumference compensation wearing and tearing volume, make the valve keep good leakproofness for a long time, reduce the replacement cost.

A bulge is arranged in the air guide sleeve 6 around the bushing 11, and corresponding mounting grooves 9 are arranged on the end surface of the bulge and the end surface of the valve clack 3 far away from the valve inlet 2; two ends of the spring 13 are respectively arranged in the inner bulge of the air guide sleeve 6 and the installation groove 9 on the valve clack 3, so that the valve clack 3 is limited to axially move in a short stroke, and the response speed for closing the inlet of the valve is higher.

The valve sleeve 8 is connected to the inner wall of the valve body 1 of the valve outlet 10 through threads, and the valve sleeve 8 not only can protect the inner wall of the valve body 1, but also can enable the device to be easily disassembled and assembled; the valve pocket 8 is connected with the air guide sleeve 6 through the rib plate, the connection mode adopts welding, the rib plate 7 can divide the valve cavity 5 into a plurality of air guide channels, the streamline design of the outer wall of the air guide sleeve 6 is matched, the stable air guide effect on a conveying medium can be achieved, the air guide sleeve 6 can be guaranteed to be fixed in the valve cavity 5, the guide rod 14 can always keep axial movement, abrasion is reduced, and the service life is prolonged.

A breathing hole 12 is formed in the diversion cover 6, and when the valve inlet 2 is opened, a conveying medium enters the inner cavity of the diversion cover 6 through the breathing hole 12 in the circulating process, so that when the valve flap 3 closes the valve inlet 2, the valve flap 3 is pushed towards the valve seat 4 by matching with the elastic force of the spring 13, and the response speed of closing the valve inlet 2 is higher.

It should be apparent that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art. 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. An axial flow type check valve comprises a valve body (1), a valve clack (3) and a flow guide cover (6), and is characterized in that a valve cavity (5) extending to two ends along the axial direction is arranged in the valve body (1), one end of the valve clack (3) is matched with a valve inlet (2), the other end of the valve clack (3) is fixedly connected with a guide rod (14), and the guide rod (14) axially penetrates through the flow guide cover (6); the guide cover (6) is fixed in the valve cavity (5), a through hole for the guide rod (14) to pass through is formed in the guide cover (6) along the axial direction, and a bushing (11) is further arranged between the guide rod (14) and the guide cover (6).

2. The axial check valve of claim 1, wherein the bushing (11) is provided with a flange at its end near the valve outlet (10), the flange being embedded in the dome (6).

3. The axial check valve of claim 2, wherein the bushing (11) is in an interference fit with the housing (6) and the bushing (11) is in a clearance fit with the guide rod (14).

4. The axial flow check valve of claim 1, further comprising a valve seat (4), the valve seat (4) being welded to an inner wall of the valve body (1) adjacent to the valve inlet (2) and adapted to the valve flap (3).

5. The axial check valve according to claim 4, characterized in that the valve seat (4) and the flap (3) are provided with corresponding sealing surfaces, on which a sealing gasket (15) is provided.

6. The axial check valve of claim 5, characterized in that the end face of the flap (3) close to the valve inlet (2) is spherically curved.

7. The axial check valve according to claim 1, characterized in that the flow guide sleeve (6) is provided internally with a projection around the bushing (11), the end face of which projection and the end face of the flap (3) remote from the valve inlet (2) are provided with corresponding mounting grooves (9).

8. The axial flow check valve of claim 7, further comprising a spring (13), wherein both ends of the spring (13) are respectively mounted in the mounting groove (9) on the inner protrusion of the air guide sleeve (6) and the valve flap (3).

9. The axial flow check valve as recited in claim 1, further comprising a valve housing (8), wherein the valve housing (8) is threadedly attached to an inner wall of the valve body (1) at the valve outlet (10), and wherein the valve housing (8) is connected to the flow guide sleeve (6) by a plurality of ribs (7).

10. The axial check valve according to claim 1, characterized in that the air guide sleeve (6) is provided with at least one breathing hole (12).