CN219888812U

CN219888812U - Combined check valve

Info

Publication number: CN219888812U
Application number: CN202321725873.XU
Authority: CN
Inventors: 王帮海; 张维朋; 张华�
Original assignee: Zhejiang Dongjin Valve Co ltd
Current assignee: Zhejiang Dongjin Valve Co ltd
Priority date: 2023-07-03
Filing date: 2023-07-03
Publication date: 2023-10-24
Anticipated expiration: 2033-07-03

Abstract

The utility model relates to the technical field of check valves, in particular to a combined check valve which comprises a first connecting part, wherein an inlet is formed in the side wall of the first connecting part, a water inlet pipe is connected to the inlet, a second connecting part is detachably arranged at the top end of the first connecting part, a filter screen is arranged at the joint of the second connecting part and the first connecting part, an outlet is formed in the side wall of the second connecting part, a water outlet pipe is connected to the outlet, a top cover is detachably arranged at the top end of the second connecting part, a limiting seat is connected to the middle part of the bottom end of the top cover, an adjusting rod is slidably connected to the inner wall of the limiting seat, a valve plate is arranged at the bottom end of the adjusting rod, and the bottom end of the valve plate is matched with the second connecting part. The utility model has convenient and quick disassembly and assembly, is convenient for cleaning or replacing elements in the check valve, provides convenience for overhauling, avoids the blockage of the check valve caused by impurities, and improves the check efficiency.

Description

Combined check valve

Technical Field

The utility model relates to the technical field of check valves, in particular to a combined check valve.

Background

The check valve is a valve with a circular valve clack and used for blocking the backflow of a medium by the action of the self weight and the pressure of the medium, and belongs to automatic valves, namely a check valve, a one-way valve, a backflow valve or an isolation valve, wherein the medium flows in from an inlet end and flows out from an outlet end, when the inlet pressure is greater than the sum of the weight of the valve clack and the flow resistance of the valve clack, the valve is opened, and otherwise, the valve is closed when the medium flows back.

The Chinese patent with the publication number of CN212804415U discloses a combined check valve, which comprises a valve body, wherein a filter screen is arranged to filter out some larger particles from a medium in the valve body, and an activated carbon adsorption net can filter and adsorb some small particle impurities in the medium to ensure the cleanliness of the medium in the valve body; by arranging the water pressure detector, the water pressure in the water inlet pipe can be measured, an alarm can be sent when the water pressure is too high due to the fact that the waterproof block breaks down, workers are reminded of timely maintenance, and the damage of equipment to the workers is avoided; the medium flow quantity in the valve body can be detected by arranging the meter, so that subsequent statistics on the medium is facilitated, the working flow is reduced, and the working efficiency is improved.

But current check valve is when using, and filter screen dismouting is loaded down with trivial details, in order to avoid the filter screen to be stopped up by impurity and disturb fluid circulation after using a period, need demolish the valve body from the pipeline again with the inside filter screen of valve body demolish clearance or change to the inside component of valve body is impaired after the dismouting convenient and fast inadequately, has brought inconvenience for maintenance work.

Disclosure of Invention

The utility model aims to solve the problems in the background art and provides a combined check valve.

The technical scheme of the utility model is as follows: the utility model provides a combination formula check valve, including first connecting portion, the entry has been seted up to first connecting portion lateral wall, the entrance is connected with the inlet tube, first connecting portion top demountable installation has the second connecting portion, the junction of second connecting portion and first connecting portion is provided with the filter screen, the export has been seted up to second connecting portion lateral wall, the exit is connected with the outlet pipe, the top demountable installation of second connecting portion has the top cap, the bottom middle part of top cap is connected with spacing seat, the inner wall sliding connection of spacing seat has the regulation pole, the valve plate is installed to the bottom of regulation pole, the bottom and the second connecting portion looks adaptation of valve plate.

Preferably, the top end of the second connecting part is connected with a third connecting seat, the third connecting seat is connected with the top cover through a bolt, the bottom end of the second connecting part is connected with a connecting pipe, the bottom end of the connecting pipe is connected with the second connecting seat, the top end of the first connecting part is connected with a first connecting seat, and the first connecting seat is connected with the second connecting seat through a bolt.

Preferably, the bottom of the first connecting part is provided with a through hole, the through hole is connected with a convex seat, and the outer thread of the convex seat is connected with a sealing cover.

Preferably, the filter screen butt is provided with the sealing washer on the top of filter screen between first connecting seat and second connecting seat, sealing washer and second connecting seat looks adaptation.

Preferably, the outer wall cover of adjusting the pole is equipped with the spring, and the spacing seat bottom is connected on the spring top, and the valve plate is connected to the spring bottom.

Preferably, the bottom end of the valve plate is abutted with the bottom end of the second connecting part, and a sealing gasket matched with the bottom end of the second connecting part is arranged at the bottom end of the valve plate.

Preferably, the water inlet pipe and the water outlet pipe are provided with flange plates.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial technical effects: according to the utility model, impurities filtered by the filter screen in the first connecting part are conveniently cleaned at regular intervals through the arrangement of the sealing cover and the convex seat, so that the check valve is prevented from being blocked by the impurities; the filter screen is convenient to disassemble and assemble through the arrangement of the first connecting part, the first connecting seat, the second connecting seat and the connecting pipe, so that the filter screen is convenient to clean regularly, and the filter screen is prevented from being blocked by impurities to interfere with fluid flow; the check efficiency is conveniently improved through the arrangement of the adjusting rod, the spring and the valve plate; the top cover is convenient to disassemble and assemble through the top cover and the third connecting seat, so that a worker can overhaul the adjusting rod and the spring conveniently, the disassembly and the assembly are convenient and quick, and convenience is brought to overhaul and cleaning of the check valve.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of a connection mode between a valve plate and a second connecting portion according to the present utility model;

FIG. 3 is a schematic view showing a connection mode of the first connecting portion and the sealing cover according to the present utility model;

FIG. 4 is a schematic diagram illustrating the installation of the first connecting portion and the second connecting portion according to the present utility model;

fig. 5 is a cross-sectional view of the internal structure of the present utility model.

Reference numerals: 1. a first connection portion; 101. a water inlet pipe; 102. sealing cover; 103. a boss; 104. a first connection base; 2. a filter screen; 201. a seal ring; 3. a second connecting portion; 301. a connecting pipe; 302. a second connecting seat; 303. a water outlet pipe; 304. a third connecting seat; 4. a top cover; 401. a limit seat; 402. an adjusting rod; 403. a valve plate; 404. a sealing gasket; 405. and (3) a spring.

Detailed Description

Example 1

As shown in fig. 1 to 5, the combined check valve provided by the utility model comprises a first connecting part 1, wherein an inlet is formed in the side wall of the first connecting part 1, a water inlet pipe 101 is connected at the inlet, a second connecting part 3 is detachably arranged at the top end of the first connecting part 1, a filter screen 2 is arranged at the joint of the second connecting part 3 and the first connecting part 1, an outlet is formed in the side wall of the second connecting part 3, a water outlet pipe 303 is connected at the outlet, a top cover 4 is detachably arranged at the top end of the second connecting part 3, a limiting seat 401 is connected in the middle of the bottom end of the top cover 4, an adjusting rod 402 is slidably connected with the inner wall of the limiting seat 401, a valve plate 403 is arranged at the bottom end of the adjusting rod 402, and the bottom end of the valve plate 403 is matched with the second connecting part 3.

It should be noted that, the check valve is further provided with a water pressure detector, not shown, the detection end of the detector is located at the bottom of the valve plate 403, which is a known technology, and the specific principle and structure are recorded in detail in the patent with the issued publication number CN212804415U, and are not repeated.

Further, the top end of the second connecting portion 3 is connected with a third connecting seat 304, the third connecting seat 304 is connected with the top cover 4 through a bolt, a second sealing ring is arranged between the third connecting seat 304 and the top cover 4, fluid leakage at the joint is avoided, a plurality of groups of second mounting holes matched with the bolt are formed in the joint of the third connecting seat 304 and the top cover 4, the disassembly and the assembly are convenient, the bottom end of the second connecting portion 3 is connected with a connecting pipe 301, the bottom end of the connecting pipe 301 is connected with a second connecting seat 302, the top end of the first connecting portion 1 is connected with a first connecting seat 104, the first connecting seat 104 is connected with the second connecting seat 302 through a bolt, and a plurality of groups of first mounting holes matched with the bolt are formed in the joint of the first connecting seat 104 and the second connecting seat 302, and the disassembly and the assembly are convenient.

Further, filter screen 2 butt is provided with sealing washer 201 on the top of filter screen 2 between first connecting seat 104 and second connecting seat 302, and sealing washer 201 and second connecting seat 302 looks adaptation, and the setting of sealing washer 201 avoids the junction to take place that the fluid is revealed, and filter screen 2 can dismantle, the clearance of being convenient for.

Further, the bottom end of the valve plate 403 is abutted with the bottom end of the second connecting portion 3, the bottom end of the valve plate 403 is provided with a sealing gasket 404 which is matched with the bottom end of the second connecting portion 3, and the sealing gasket 404 can prevent fluid leakage when the valve plate 403 is abutted with the bottom end of the second connecting portion 3, so that the sealing performance is high.

Further, the water inlet pipe 101 and the water outlet pipe 303 are respectively provided with a flange, so that the water inlet pipe and the water outlet pipe are conveniently connected with other pipelines through bolts.

In this embodiment, the water inlet pipe 101 and the water outlet pipe 303 are connected in the pipeline through the bolts and the flange, the fluid enters the connecting pipe 301 from the water inlet pipe 101 along the first connecting portion 1 and the filter screen 2, the impurities in the fluid are filtered conveniently by the arrangement of the filter screen 2, the filtered impurities fall into the bottom end of the first connecting portion 1 under the action of self gravity, the valve plate 403 is lifted up by the fluid, so that the adjusting rod 402 slides upwards along the limiting seat 401, at this moment, the channel at the bottom end of the second connecting portion 3 is opened, the fluid enters the water outlet pipe 303 along the second connecting portion 3 and flows into the pipeline again, and when the fluid flows back, the adjusting rod 402 slides downwards along the limiting seat 401 to drive the valve plate 403 to abut against the bottom end of the second connecting portion 3 under the action of water pressure and self gravity, so as to avoid the fluid backflow; the staff regularly removes the bolt and separates the first connecting seat 104 on the top of first connecting portion 1 and the second connecting seat 302 of connecting pipe 301 bottom, can dismantle the clearance with filter screen 2, removes the bolt and separates the third connecting seat 304 on top of top cap 4 and second connecting portion 3, can separate top cap 4 and sealing pad 404 and second connecting portion 3, can overhaul adjusting lever 402, valve plate 403 and sealing pad 404, and the clearance maintenance is more convenient.

Example two

As shown in fig. 1 and fig. 3 to fig. 5, compared with the first embodiment, the bottom end of the first connecting portion 1 is provided with a through hole, a boss 103 is connected at the through hole, the external thread of the boss 103 is connected with a sealing cover 102, anti-skidding threads are arranged on the external part of the sealing cover 102, friction force is increased, and slipping phenomenon is avoided when the sealing cover 102 is rotated.

In this embodiment, impurity in the fluid filtered through filter screen 2 falls into first connecting portion 1 bottom under self gravity effect, after using a period of time, the staff unscrews sealed lid 102 through the instrument and makes it separate with boss 103, can clear up impurity in the first connecting portion 1, need not to pull down the clearance with whole check valve.

Example III

As shown in fig. 2 and fig. 5, in the combined check valve according to the present utility model, compared with the first embodiment, the outer wall of the adjusting rod 402 is sleeved with the spring 405, the top end of the spring 405 is connected to the bottom end of the limiting seat 401, and the bottom end of the spring 405 is connected to the valve plate 403.

In this embodiment, when fluid enters the connecting pipe 301 from the water inlet pipe 101 and the first connecting portion 1, the fluid pushes up the valve plate 403 upward, so that the adjusting rod 402 slides upward along the limiting seat 401, meanwhile, the spring 405 is compressed, at this time, the fluid enters the water outlet pipe 303 along the second connecting portion 3 and flows into the next pipeline, and when the fluid returns, the valve plate 403 is driven to rapidly abut against the bottom end of the second connecting portion 3 under the elastic force recovery action of the spring 405, so as to seal the bottom end of the second connecting portion 3, thereby avoiding the fluid from returning and having higher check efficiency.

Working principle: the arrangement of the sealing cover 102 and the boss 103 is convenient for cleaning the impurities filtered by the filter screen 2 in the first connecting part 1 at regular intervals, so that the check valve is prevented from being blocked by the impurities; the filter screen 2 is convenient to disassemble and assemble through the arrangement of the first connecting part 1, the first connecting seat 104, the second connecting seat 302 and the connecting pipe 301, the filter screen 2 is convenient to clean regularly, and the filter screen 2 is prevented from being blocked by impurities to interfere with fluid flow; the check efficiency is conveniently improved through the arrangement of the adjusting rod 402, the spring 405 and the valve plate 403; the top cover 4 is convenient to disassemble and assemble through the top cover 4 and the third connecting seat 304, so that a worker can overhaul the adjusting rod 402 and the spring 405 conveniently, and the check valve is convenient to overhaul and clean.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims

1. The utility model provides a combination formula check valve, a serial communication port, including first connecting portion (1), the entry has been seted up to first connecting portion (1) lateral wall, the entrance is connected with inlet tube (101), second connecting portion (3) are installed to first connecting portion (1) top demountable installation, junction of second connecting portion (3) and first connecting portion (1) is provided with filter screen (2), the export has been seted up to second connecting portion (3) lateral wall, the exit is connected with outlet pipe (303), top demountable installation of second connecting portion (3) has top cap (4), bottom mid-section of top cap (4) is connected with spacing seat (401), inner wall sliding connection of spacing seat (401) has regulation pole (402), valve plate (403) are installed to the bottom of regulation pole (402), the bottom and the looks adaptation of second connecting portion (3) of valve plate (403).

2. The combined check valve according to claim 1, wherein the top end of the second connecting portion (3) is connected with a third connecting seat (304), the third connecting seat (304) is connected with the top cover (4) through a bolt, the bottom end of the second connecting portion (3) is connected with a connecting pipe (301), the bottom end of the connecting pipe (301) is connected with a second connecting seat (302), the top end of the first connecting portion (1) is connected with a first connecting seat (104), and the first connecting seat (104) is connected with the second connecting seat (302) through a bolt.

3. A combined check valve according to claim 2, characterized in that the bottom end of the first connecting part (1) is provided with a through hole, a boss (103) is connected to the through hole, and a sealing cover (102) is connected to the external thread of the boss (103).

4. A combined check valve according to claim 2, characterized in that the filter screen (2) is abutted between the first connecting seat (104) and the second connecting seat (302), the top end of the filter screen (2) is provided with a sealing ring (201), and the sealing ring (201) is matched with the second connecting seat (302).

5. The combined check valve according to claim 1, wherein a spring (405) is sleeved on the outer wall of the adjusting rod (402), the top end of the spring (405) is connected with the bottom end of the limiting seat (401), and the bottom end of the spring (405) is connected with the valve plate (403).

6. A combined check valve according to claim 2, characterized in that the bottom end of the valve plate (403) is in abutment with the bottom end of the second connecting part (3), and that the bottom end of the valve plate (403) is provided with a sealing gasket (404) adapted to the bottom end of the second connecting part (3).

7. A combined check valve according to claim 1, characterised in that the inlet pipe (101) and the outlet pipe (303) are provided with flanges.