CN213808880U

CN213808880U - Slow-closing check valve

Info

Publication number: CN213808880U
Application number: CN202022247494.7U
Authority: CN
Inventors: 洪冰冰; 洪祺开; 洪敏志
Original assignee: BEIJING GUANLONG VALVE FACTOR
Current assignee: BEIJING GUANLONG VALVE FACTOR
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-07-27
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a slowly close formula check valve, which comprises a valve body, valve body middle part front side inner wall fixed connection intermediate lamella front side and rear side, the inlet opening has been seted up at the intermediate lamella middle part, the valve body top corresponds the inlet opening and has seted up the top activity groove, valve body top fixed connection apron bottom, the apron bottom corresponds the top activity groove and has seted up bottom activity groove, the apron is close to bottom activity groove top and has seted up the mounting hole, the apron is close to the mounting hole top and has seted up the movable hole, valve body and apron connect the activity pole top through top activity groove, bottom activity groove, mounting hole and activity hole cover, the activity pole outer wall is inboard at the downthehole fixed connection slider of activity. This slowly-closed check valve, through the rubber stretch cover that sets up, can effectually guarantee the leakproofness between valve body and the apron, can also guarantee the upper and lower free activity of movable rod simultaneously, the effectual poor problem of current slow closed check valve leakproofness of having solved.

Description

Slow-closing check valve

Technical Field

The utility model relates to a check valve technical field specifically is a slowly-closed check valve.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. Swing check valves have a flap that is tilted and can pivot, and operate on a similar principle to lift check valves. The check valve is commonly used as a bottom valve of a water pumping device and can prevent the backflow of water. The check valve and the stop valve are combined for use, and the safety isolation effect can be achieved. The disadvantages are high resistance and poor sealing performance when closed.

The existing slow-closing check valve has poor sealing performance and is not good in slow closing when the valve is opened, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a slowly close formula check valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a slow-closing check valve comprises a valve body, wherein the inner wall of the rear side of the front side of the middle part of the valve body is fixedly connected with the front side and the rear side of a middle plate, the middle part of the middle plate is provided with a water inlet hole, the top of the valve body is provided with a top movable groove corresponding to the water inlet hole, the top of the valve body is fixedly connected with the bottom of a cover plate, the bottom of the cover plate is provided with a bottom movable groove corresponding to the top of the top movable groove, the cover plate is provided with a mounting hole near the top of the mounting hole, the valve body and the cover plate are sleeved with the top end of a movable rod through the top movable groove, the outer wall of the movable rod is fixedly connected with the inner side of a sliding block in the movable hole, the sliding groove is provided with a sliding groove corresponding to the sliding block, the cover plate is slidably connected with the sliding block through the sliding groove, the outer wall of the movable rod is fixedly connected with a limit ring inner ring between the top movable groove and the bottom movable groove, the movable rod cup joints the pressure spring between slider and spacing ring, the articulated telescopic link right-hand member of spacing ring outer lane hinge, the articulated valve body of telescopic link left end hinge is at top movable groove middle part, the movable rod outer wall is close to spacing ring bottom fixed connection rubber sleeve inner wall, rubber sleeve outer wall fixed connection rubber is unfolded and is covered the top, the solid fixed ring inner circle of rubber unfolding cover bottom fixed connection, gu fixed ring inlays the bottom inner wall at valve body top movable groove, movable rod bottom fixed connection valve clack middle part.

Preferably, the diameter of the movable hole is smaller than that of the mounting hole, and the diameter of the spring is larger than that of the movable hole.

Preferably, the sliding grooves are distributed in the movable holes in a right-angle crossed manner, and the sliding blocks on the outer wall of the movable rod are distributed on the outer wall of the movable rod in a right-angle crossed manner corresponding to the sliding grooves.

Preferably, the number of the telescopic rods is four, and the four telescopic rods are distributed on the outer wall of the movable rod in a right-angle crossed manner.

Preferably, solid fixed ring, rubber stretch out cover and rubber sleeve integrated into one piece, and solid fixed ring is made for the rubber material.

Preferably, the rubber stretching cover is conical, and the diameter of the top of the rubber stretching cover is smaller than that of the bottom of the rubber stretching cover.

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

1. this slowly-closed check valve, through the rubber stretch cover that sets up, can effectually guarantee the leakproofness between valve body and the apron, can also guarantee the upper and lower free activity of movable rod simultaneously, the effectual poor problem of current slow closed check valve leakproofness of having solved.

2. This slowly close formula check valve, through the telescopic link that sets up, when being greater than the power of pressure spring through inlet pressure, the movable rod passes through the slider and slides in the spout to the movable rod drives the valve clack and shifts up, and the inlet opening is opened, and the medium reaches the circulation, and the telescopic link that sets up can be when opening, through the frictional force when telescopic link self is flexible, can effectually reach the effect of slowly closing, thereby solve and carry out the valve and open the time slow not good problem of closing.

Drawings

FIG. 1 is a front view of the internal structure of the present invention;

FIG. 2 is a schematic diagram of a slider distribution structure at the top of a movable rod;

FIG. 3 is a schematic diagram of the middle valve flap fitting structure of the middle plate;

fig. 4 is a schematic view of the internal structure between the top of the valve body and the cover plate.

In the figure: 1. a cover plate; 2. a top movable groove; 3. a bottom movable groove; 4. a movable rod; 5. a valve body; 6. A water inlet hole; 7. a valve flap; 8. a middle plate; 9. a slider; 10. mounting holes; 11. a chute; 12. a pressure spring; 13. a fixing ring; 14. a rubber stretch cover; 15. a rubber sleeve; 16. a limiting ring; 17. a movable hole; 18. a telescopic rod.

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 slowly-closed check valve comprises a valve body 5, wherein the inner wall of the front side and the rear side of the middle part of the valve body 5 is fixedly connected with the front side and the rear side of a middle plate 8, the middle part of the middle plate 8 is provided with a water inlet hole 6, the top of the valve body 5 is provided with a top movable groove 2 corresponding to the water inlet hole 6, the top of the valve body 5 is fixedly connected with the bottom of a cover plate 1, the bottom of the cover plate 1 is provided with a bottom movable groove 3 corresponding to the top movable groove 2, the cover plate 1 is provided with a movable hole 17 close to the top of the bottom movable groove 3, the valve body 5 and the cover plate 1 are sleeved with the top end of a movable rod 4 through the top movable groove 2, the bottom movable groove 3, the mounting hole 10 and the movable hole 17, the outer wall of the movable rod 4 is fixedly connected with the inner side of a sliding block 9 in the movable hole 17, the movable hole 17 is provided with a sliding groove 11 corresponding to the sliding block 9, the cover plate 1 is slidably connected with the sliding block 9 through the sliding groove 11, the sliding groove 11 is orthogonally and crossly distributed in the movable hole 17, and the slide block 9 on the outer wall of the movable rod 4 is distributed on the outer wall of the movable rod 4 in a right-angle crossed manner corresponding to the slide groove 11, the inner ring of a limiting ring 16 is fixedly connected between the top movable groove 2 and the bottom movable groove 3 on the outer wall of the movable rod 4, the movable rod 4 is sleeved with a pressure spring 12 between the slide block 9 and the limiting ring 16, the diameter of a movable hole 17 is smaller than that of a mounting hole 10, the diameter of the pressure spring 12 is larger than that of the movable hole 17, the outer ring of the limiting ring 16 is hinged with the right end of a telescopic rod 18, the left end of the telescopic rod 18 is hinged with a valve body 5 in the middle of the top movable groove 2, four telescopic rods 18 are arranged, the four telescopic rods are distributed on the outer wall of the movable rod 4 in a right-angle crossed manner, through the arranged telescopic rod 18, when the inlet pressure is larger than the force of the pressure spring 12, the movable rod 4 slides in the slide groove 11, so that the movable rod 4 drives the valve clack 7 to move upwards, the water inlet hole 6 is opened, the medium is circulated, and the arranged telescopic rod 18 can be opened, the friction force of the telescopic rod 18 during self expansion can effectively achieve the effect of slow closing, so that the problem of poor slow closing during opening of the valve is solved, the outer wall of the movable rod 4 is close to the inner wall of the rubber sleeve 15 fixedly connected to the bottom of the limiting ring 16, the outer wall of the rubber sleeve 15 is fixedly connected to the top of the rubber unfolding cover 14, the bottom of the rubber unfolding cover 14 is fixedly connected to the inner ring of the fixing ring 13, the fixing ring 13 is embedded in the inner wall of the bottom of the movable groove 2 at the top of the valve body 5, the fixing ring 13, the rubber unfolding cover 14 and the rubber sleeve 15 are integrally formed, the fixing ring 13 is made of rubber material, the rubber unfolding cover 14 is conical, the diameter of the top of the rubber unfolding cover 14 is smaller than that of the bottom, the bottom of the movable rod 4 is fixedly connected to the middle part of the valve clack 7, the sealing performance between the valve body 5 and the cover plate 1 can be effectively guaranteed through the arranged rubber unfolding cover 14, and the up-and-down free movement of the movable rod 4 can be guaranteed, the effectual poor problem of current slow closed check valve leakproofness of having solved.

When using, when being greater than the power of pressure spring 12 through inlet pressure, movable rod 4 slides in spout 11 through slider 9 to movable rod 4 drives valve clack 7 and shifts up, and inlet opening 6 is opened, and the medium reaches the circulation, and the telescopic link 18 that sets up can be when opening, through the frictional force when telescopic link 18 self is flexible, can effectually reach the effect of slowly closing.

To sum up, this slowly close formula check valve is through the rubber stretch out cover 14 that sets up, can effectually guarantee the leakproofness between valve body 5 and the apron 1, can also guarantee the upper and lower free activity of movable rod 4 simultaneously, the effectual poor problem of current slowly close formula check valve leakproofness of having solved, through the telescopic link 18 that sets up, when being greater than the power of pressure spring 12 through inlet pressure, movable rod 4 slides in spout 11 through slider 9, thereby movable rod 4 drives valve clack 7 and shifts up, inlet opening 6 is opened, the medium reaches the circulation, and the telescopic link 18 that sets up can be when opening, frictional force when flexible through telescopic link 18 self, can effectually reach the effect of slowly closing, thereby solve and carry out the not good problem of slowly closing when the valve is opened.

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 a slow-closing check valve, includes valve body (5), its characterized in that: the inner wall of the front side and the rear side of the middle part of the valve body (5) is fixedly connected with the front side and the rear side of the middle plate (8), the middle part of the middle plate (8) is provided with a water inlet hole (6), the top of the valve body (5) is provided with a top movable groove (2) corresponding to the water inlet hole (6), the top of the valve body (5) is fixedly connected with the bottom of the cover plate (1), the bottom of the cover plate (1) is provided with a bottom movable groove (3) corresponding to the top movable groove (2), the cover plate (1) is provided with a mounting hole (10) close to the top of the bottom movable groove (3), the cover plate (1) is provided with a movable hole (17) close to the top of the mounting hole (10), the valve body (5) and the cover plate (1) are sleeved with the top end of the movable rod (4) through the top movable groove (2), the bottom movable groove (3), the mounting hole (10) and the movable hole (17), the outer wall of the movable rod (4) is fixedly connected with the inner side of the sliding block (9) in the movable hole (17), the movable hole (17) corresponds to the sliding block (9) and is provided with a sliding groove (11), the cover plate (1) is connected with the sliding block (9) through the sliding groove (11), the outer wall of the movable rod (4) is fixedly connected with an inner ring of a limiting ring (16) between the top movable groove (2) and the bottom movable groove (3), the movable rod (4) is sleeved with a pressure spring (12) between the sliding block (9) and the limiting ring (16), the outer ring of the limiting ring (16) is hinged with the right end of a telescopic rod (18), the left end of the telescopic rod (18) is hinged with a valve body (5) at the middle part of the top movable groove (2), the outer wall of the movable rod (4) is close to the inner wall of a rubber sleeve (15) fixedly connected with the bottom of the limiting ring (16), the outer wall of the rubber sleeve (15) is fixedly connected with the top of a rubber unfolding cover (14), and the inner ring of a fixed ring (13) fixedly connected with the bottom of the rubber unfolding cover (14), the fixed ring (13) is embedded in the inner wall of the bottom of the movable groove (2) in the top of the valve body (5), and the bottom end of the movable rod (4) is fixedly connected with the middle part of the valve clack (7).

2. A slow closing check valve as defined in claim 1, wherein: the diameter of the movable hole (17) is smaller than that of the mounting hole (10), and the diameter of the pressure spring (12) is larger than that of the movable hole (17).

3. A slow closing check valve as defined in claim 1, wherein: the sliding grooves (11) are distributed in the movable holes (17) in a right-angle crossed manner, and the sliding blocks (9) on the outer wall of the movable rod (4) are distributed on the outer wall of the movable rod (4) in a right-angle crossed manner corresponding to the sliding grooves (11).

4. A slow closing check valve as defined in claim 1, wherein: the number of the telescopic rods (18) is four, and the four telescopic rods are distributed on the outer wall of the movable rod (4) in a right-angle crossed manner.

5. A slow closing check valve as defined in claim 1, wherein: the fixing ring (13), the rubber stretching cover (14) and the rubber sleeve (15) are integrally formed, and the fixing ring (13) is made of rubber.

6. A slow closing check valve as defined in claim 1, wherein: the rubber stretching cover (14) is conical, and the diameter of the top of the rubber stretching cover (14) is smaller than that of the bottom of the rubber stretching cover.