CN212775754U

CN212775754U - Filtering check valve

Info

Publication number: CN212775754U
Application number: CN202021251727.4U
Authority: CN
Inventors: 邹文良; 晁爱平; 邹小勇
Original assignee: Jiangsu Puxi Industrial Co ltd
Current assignee: Jiangsu Puxi Industrial Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-23
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to the technical field of check valves, in particular to a filtering check valve, which comprises a valve body, a valve cover, a connecting pipe and a connecting sleeve, wherein one end of the valve body is provided with a medium inlet, the other end of the valve body is provided with a medium outlet, a cavity is arranged inside the valve body, both ends of the valve body are provided with first flange plates, the top of the valve body is provided with the valve cover, the contact part of the valve cover and the valve body is provided with a first sealing ring, the valve cover and the valve body are fixedly connected through a plurality of groups of first fixing bolts, the center of the bottom of the valve cover is provided with a guide sleeve, the inside of the guide sleeve is connected with a valve rod, the outside of the valve rod is sleeved with a reset spring, the bottom of the valve rod is provided with a valve clack, the outside, the impurity is prevented from entering the valve, the filter screen is convenient to clean, and certain popularization value is achieved.

Description

Filtering check valve

Technical Field

The utility model relates to a check valve technical field specifically is a filtration formula check valve.

Background

The check valve is a valve whose opening and closing member is a circular valve clack and can be actuated by self weight and medium pressure to block back flow of medium, belonging to the field of automatic valve, also called check valve, one-way valve, reflux valve or isolating valve, and its valve clack movement mode can be divided into lifting type and swing type, the lifting type check valve is similar to the structure of stop valve, and only lacks valve rod for driving valve clack, the medium can be flowed in from inlet end and flowed out from outlet end, when the inlet pressure is greater than the sum of valve clack weight and its flow resistance, the valve is opened, otherwise, when the medium is back-flowed, the valve is closed, and the swing type check valve has a valve clack which is obliquely placed and can be rotated around shaft, its working principle is similar to that of lifting type check valve, and the,

when the existing check valve is used, the fluid in the valve may contain impurities, and when the fluid flows in the valve, the impurities can be adhered to the valve clack and the inner wall of the cavity, so that the valve clack is not tightly closed when being closed, and the effect of preventing backflow is influenced, therefore, a filtering type check valve is needed to improve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a filtration 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 filtering check valve comprises a valve body, a valve cover, a connecting pipe and a connecting sleeve, wherein one end of the valve body is provided with a medium inlet, the other end of the valve body is provided with a medium outlet, a cavity is arranged inside the valve body, two ends of the valve body are respectively provided with a first flange plate, the top of the valve body is provided with the valve cover, the contact part of the valve cover and the valve body is provided with a first sealing ring, the valve cover and the valve body are fixedly connected through a plurality of groups of first fixing bolts, the center of the bottom of the valve cover is provided with a guide sleeve, the inside of the guide sleeve is connected with a valve rod, the outside of the valve rod is sleeved with a return spring, the bottom of the valve rod is provided with a valve clack, the outside of the bottom of the valve clack is provided with a second sealing ring, the, be equipped with the third sealing washer between second ring flange and the first ring flange of being close, the inside fixed mounting of connecting pipe has the fixed axle, it is equipped with the rotation cover to rotate the cover on the fixed axle, the outside of rotating the cover is that the circumference distributes and has six scraper blades, the impurity export has been seted up to the scraper blade below in the connecting pipe bottom, the blow off pipe is installed to impurity export bottom, one side that the fixed axle is close to the valve body is equipped with the adapter sleeve, the one end internally mounted that the adapter sleeve is close to the scraper blade has the filter.

Preferably, the second sealing ring is attached to the inner wall of the cavity when the valve clack is closed.

Preferably, one end of the return spring is fixedly connected with the guide sleeve, and the other end of the return spring is fixedly connected with the valve clack.

Preferably, the inner side of the connecting pipe is provided with an internal thread, the outer side of the connecting sleeve is provided with an external thread, and the connecting sleeve is connected with the connecting pipe through a thread.

Preferably, the filter screen is of a hemispherical structure, the scraper is of an arc-shaped structure, and the filter screen at the front end of the scraper is attached to the scraper.

Preferably, a manual control valve is arranged on the sewage draining pipe.

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

1. the utility model discloses in, through valve clack and the reset spring who sets up, when fluid medium flowed into the valve body from the medium import, be greater than reset spring's elastic pressure when fluid pressure, the valve clack is jack-up under fluid pressure to make fluid medium pass through, when fluid medium flows backward, the valve clack is close to the cavity inner wall under reset spring effect, the second sealing washer is laminated with the cavity inner wall mutually, prevent the fluid medium backward flow, backward flow fluid pressure is when big more simultaneously, the valve clack is more accurate with the laminating of cavity inner wall, it is sealed effectual.

2. The utility model discloses in, through connecting pipe and the adapter sleeve that sets up, the adapter sleeve passes through threaded connection with the connecting pipe, and the adapter sleeve inboard installs the filter screen, filters the impurity in the fluid, avoids in the impurity admission valve in the fluid, and the adhesion makes when preventing the backward flow on valve clack and cavity inner wall, has the clearance between valve clack and the cavity inner wall, influences the leakproofness, improves the effect of preventing the backward flow.

3. The utility model discloses in, the connecting tube inside through setting up is provided with the fixed axle, it is equipped with the rotation cover to rotate the cover on the fixed axle, it is equipped with six circular-arc scraper blades to rotate the cover outside, and circular-arc scraper blade front end laminating semi spherical structure's filter screen, when the fluid passes through, it rotates to drive the scraper blade, scrape the impurity of the adhesion on the filter screen down, the impurity of scraping down flows to the blow off pipe through the impurity export, discharge through opening the manual control valve on the blow off pipe, avoid the filter screen to use for a long time and cause the jam, influence fluidic flow, convenient clean impurity, and convenient to use.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the valve flap of the present invention when closed;

fig. 3 is a side view of the connecting pipe of the present invention.

In the figure: 1-valve body, 2-medium inlet, 3-cavity, 4-first flange, 5-medium outlet, 6-valve cover, 7-guide sleeve, 8-first sealing ring, 9-first fixing bolt, 10-valve rod, 11-valve flap, 12-reset spring, 13-second sealing ring, 14-connecting pipe, 15-second flange, 16-second fixing bolt, 17-third sealing ring, 18-fixing shaft, 19-scraper, 20-impurity outlet, 21-sewage pipe, 22-filter screen, 23-connecting sleeve and 24-rotating sleeve.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

a filtering check valve comprises a valve body 1, a valve cover 6, a connecting pipe 14 and a connecting sleeve 23, wherein one end of the valve body 1 is provided with a medium inlet 2, the other end of the valve body 1 is provided with a medium outlet 5, a cavity 3 is arranged inside the valve body 1, two ends of the valve body 1 are respectively provided with a first flange 4, the top of the valve body 1 is provided with the valve cover 6, a first sealing ring 8 is arranged at the contact part of the valve cover 6 and the valve body 1, the valve cover 6 and the valve body 1 are fixedly connected through a plurality of groups of first fixing bolts 9, the center of the bottom of the valve cover 6 is provided with a guide sleeve 7, the guide sleeve 7 is internally connected with a valve rod 10, the outer side of the valve rod 10 is sleeved with a return spring 12, the bottom of the valve rod 10 is provided with a valve flap 11, one end of the return spring 12 is fixedly connected with the, a connecting pipe 14 is connected at the medium inlet 2 of the valve body 1, second flange plates 15 are arranged at two sides of the connecting pipe 14, the second flange plates 15 are connected with the adjacent first flange plates 4 through a plurality of groups of second fixing bolts 16, a third sealing ring 17 is arranged between the second flange plates 15 and the adjacent first flange plates 4, a fixing shaft 18 is fixedly arranged in the connecting pipe 14, a rotating sleeve 24 is rotatably sleeved on the fixing shaft 18, six scraping plates 19 are circumferentially distributed at the outer side of the rotating sleeve 24, each scraping plate 19 is of an arc-shaped structure, an impurity outlet 20 is formed at the bottom of the connecting pipe 14 below each scraping plate 19, a sewage discharge pipe 21 is arranged at the bottom of each impurity outlet 20, a manual control valve is arranged on each sewage discharge pipe 21, a connecting sleeve 23 is arranged at one side of the fixing shaft 18 close to the valve body 1, inner threads are arranged at, a filter screen 22 is arranged inside one end of the connecting sleeve 23 close to the scraper 19, the filter screen 22 is of a hemispherical structure, and the filter screen 22 at the front end of the scraper 19 is attached to each other.

The utility model discloses work flow: when the valve is used, when fluid medium flows into the valve body 1 from the medium inlet 2, when the fluid pressure is greater than the elastic pressure of the return spring 12, the valve flap 11 is jacked up under the fluid pressure, so that the fluid medium passes through, when the fluid medium flows backwards, the valve flap 11 is close to the inner wall of the cavity 3 under the action of the return spring 12, the second sealing ring 13 is attached to the inner wall of the cavity 3 to prevent the fluid medium from flowing backwards, and when the pressure of the backflow fluid is higher, the attachment between the valve flap 11 and the inner wall of the cavity 3 is more precise, the sealing effect is good, the connecting sleeve 23 is in threaded connection with the connecting pipe 14, the filter screen 23 is arranged on the inner side of the connecting sleeve 23 to filter impurities in the fluid, so that the impurities in the fluid are prevented from entering the valve and being adhered to the valve flap 11 and the inner wall of the cavity, when backflow is prevented, a gap, through the inside fixed axle 18 that is provided with of connecting pipe 14, it is equipped with and rotates cover 24 to rotate the cover on the fixed axle 18, it is equipped with six circular-arc scraper blades 19 to rotate the cover 24 outside, and circular-arc scraper blade 19 front end laminating semi spherical structure's filter screen 22, when the fluid passes through, it rotates to drive scraper blade 19, scrape the impurity of the adhesion on the filter screen 22 down, the impurity of scraping down flows to blow off pipe 21 through impurity export 20, discharge through opening the manual control valve on the blow off pipe 21, avoid the filter screen to use for a long time and cause the jam, influence fluidic flow, convenient clean impurity, it is effectual wholly to prevent the backward flow, avoid in the impurity admission valve, and be convenient for clean the filter screen, certain.

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 filtration formula check valve, includes valve body (1), valve gap (6), connecting pipe (14) and adapter sleeve (23), its characterized in that: the improved valve is characterized in that one end of the valve body (1) is provided with a medium inlet (2), the other end of the valve body (1) is provided with a medium outlet (5), a cavity (3) is arranged inside the valve body (1), both ends of the valve body (1) are provided with first flange plates (4), the top of the valve body (1) is provided with a valve cover (6), the contact part of the valve cover (6) and the valve body (1) is provided with a first sealing ring (8), the valve cover (6) and the valve body (1) are fixedly connected through a plurality of groups of first fixing bolts (9), the center of the bottom of the valve cover (6) is provided with a guide sleeve (7), the guide sleeve (7) is internally connected with a valve rod (10), the outer side of the valve rod (10) is sleeved with a reset spring (12), the bottom of the valve rod (10) is provided with a valve clack (11), the outer side of the bottom of the, the two sides of the connecting pipe (14) are respectively provided with a second flange (15), the second flanges (15) are connected with the adjacent first flanges (4) through a plurality of groups of second fixing bolts (16), a third sealing ring (17) is arranged between the second flange plate (15) and the adjacent first flange plate (4), a fixed shaft (18) is fixedly arranged in the connecting pipe (14), a rotating sleeve (24) is rotatably sleeved on the fixed shaft (18), six scraping plates (19) are circumferentially distributed on the outer side of the rotating sleeve (24), an impurity outlet (20) is arranged below the scraper (19) and at the bottom of the connecting pipe (14), a sewage discharge pipe (21) is arranged at the bottom of the impurity outlet (20), a connecting sleeve (23) is arranged on one side of the fixed shaft (18) close to the valve body (1), a filter screen (22) is arranged inside one end of the connecting sleeve (23) close to the scraper (19).

2. The filtering check valve of claim 1, wherein: when the valve clack (11) is closed, the second sealing ring (13) is attached to the inner wall of the cavity (3).

3. The filtering check valve of claim 1, wherein: one end of the reset spring (12) is fixedly connected with the guide sleeve (7), and the other end of the reset spring (12) is fixedly connected with the valve clack (11).

4. The filtering check valve of claim 1, wherein: the connecting pipe (14) inboard is equipped with the internal thread, adapter sleeve (23) outside is equipped with the external screw thread, adapter sleeve (23) and connecting pipe (14) pass through threaded connection.

5. The filtering check valve of claim 1, wherein: the filter screen (22) is of a hemispherical structure, the scraper blade (19) is of an arc-shaped structure, and the filter screen (22) at the front end of the scraper blade (19) is attached to each other.

6. The filtering check valve of claim 1, wherein: and a manual control valve is arranged on the sewage discharge pipe (21).