Check valve and valve with same

Abstract

The utility model discloses a check valve and a valve with the check valve, an inlet (301) of a filter channel is connected with an outlet of a first channel (1), and an outlet (302) of the filter channel is connected with an inlet of a second channel (2); a filter screen (4) is arranged in the filter channel (3), a check valve assembly is arranged in the filter channel (3), and the check valve assembly comprises a valve element (6) and a return elastic piece; a valve core seat (501) is arranged in the filter channel (3), and one end of the valve core (6) is in sliding fit with the valve core seat (501); the return elastic piece is installed between the valve element seat (501) and the valve element (6), and the sealed end of the valve element (6) abuts against the inlet (301) of the filtering channel under the action of the return elastic piece so as to seal the inlet (301) of the filtering channel. According to the check valve and the valve with the check valve, a check structure and a filtering structure are combined into a whole, the cost can be effectively reduced, connecting points are reduced, and therefore the risk of leakage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control technical field, more exactly relates to a check valve and valve with check valve. BACKGROUND

[0002] Check valve is a kind of automatic valve, it relies on medium itself flow and opens, closes valve clack automatically, to prevent medium backflow.Check valve's working principle is based on the pressure difference of fluid.When medium flows in normal direction, the pressure of fluid pushes valve clack to open, and medium passes smoothly.And when medium tries to flow reversely, the pressure of medium will tightly press valve clack on valve seat, prevent medium to pass, to realize check function.

[0003] In order to promote pipeline water quality and avoid water meter idling, reverse problem, filter and check valve are generally installed on the pipeline of urban water supply, play the role of cleaning pipeline and preventing medium backflow.But filter and check valve are installed in series in prior art, this kind of installation structure has two parts assembly, and the manufacturing cost is higher, and there are multiple connecting points after assembly, and there are more leakage points. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem, provide a kind of check valve, the check valve combines check structure and filter structure, forms integrated structure, can effectively reduce cost, reduce connecting point, to reduce the risk of leakage.

[0005] The technical solution of the utility model is to provide a check valve, comprising a pipeline, the pipeline includes a first channel, a second channel and a filter channel, the filter channel is arranged between the first channel and the second channel, the inlet of the filter channel is connected with the outlet of the first channel, and the outlet of the filter channel is connected with the inlet of the second channel, a filter screen is arranged in the filter channel, a check valve assembly is arranged in the filter channel, the check valve assembly includes a valve core and a return spring, a valve core seat is arranged in the filter channel, one end of the valve core is slidably connected with the valve core seat, the return spring is installed between the valve core seat and the valve core, and the sealing end of the valve core is abutted at the inlet of the filter channel under the action of the return spring to seal the inlet of the filter channel.

[0006] After adopting the above structure, the check valve of the utility model has the following advantages compared with the prior art:

[0007] The check valve is installed in the filter channel, the check valve structure and the filter structure are combined into one, and an integrated structure is formed.

[0008] As improvement, the valve core seat is provided with a guide groove, one end of the valve core is slidably matched in the guide groove, the valve core seat is provided with a first spring seat, the side wall of the valve core is provided with a second spring seat, the reset elastic member is a reset spring, one end of the reset spring is sleeved on the first spring seat, and the other end of the reset spring is sleeved on the second spring seat.

[0009] As improvement, the valve core comprises a sealing head and a sliding rod, one end of the sliding rod is connected to the sealing head, and the other end of the sliding rod is slidably matched in the guide groove; the sealing head is provided with a sealing element on the side close to the inlet of the filter channel, and the sealing element is used for abutting at the inlet of the filter channel.

[0010] As improvement, the filter screen is in a cylindrical structure, the inlet of the filter channel and the inner cavity of the filter screen are in communication, the outlet of the filter channel is located on the outer side of the filter screen, and the check valve assembly is located in the inner cavity of the filter screen.

[0011] As improvement, the filter channel is obliquely arranged, the inlet of the filter channel is arranged at the highest end of the filter channel, the outlet of the filter channel is arranged on the side wall of the filter channel, and the lowest end of the filter channel is provided with an opening, and the opening is detachably connected with an end cover.

[0012] As improvement, the edge of the inlet of the filter channel extends to the direction of the filter channel to form the annular sleeve seat, and the sealing end of the valve core abuts on the inner side of the annular sleeve seat.

[0013] As an improvement, the inner side of the end cover is further provided with an impurity accommodating groove, which is located on the inner side of the embedding groove.

[0014] Another technical problem to be solved by the utility model is to provide a valve with a check valve, which integrates the check structure and the filter structure to form an integrated structure, thereby effectively reducing the cost, reducing the connection points and reducing the risk of leakage.

[0015] The technical solution of the utility model is to provide a valve with a check valve, which comprises a valve body and a check valve with the above structure, wherein the second channel of the check valve is connected with the inlet channel of the valve body.

[0016] Compared with the prior art, the valve with a check valve has the following advantages.

[0017] The check valve of the valve integrates the check valve assembly into the filter channel, integrates the check structure and the filter structure and forms an integrated structure. The fluid flows into the filter channel through the inlet of the filter channel and opens the valve core, is filtered by the filter structure in the filter channel and then flows out from the outlet of the filter channel. Compared with the prior art, the structure is greatly simplified and the manufacturing cost is reduced. The integrated structure reduces the connection points and the risk of leakage. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 2 is a sectional view of the filter of the utility model.

[0019] Figure 2 Fig. 1 is a sectional view of the filter of the utility model. Figure 1 Fig. 2 is an enlarged structure diagram of part A of Fig. 1.

[0020] Figure 3 Fig. 3 is a sectional view of the filter (in use) of the utility model.

[0021] As shown in the drawings: 1, first channel, 2, second channel, 3, filter channel, 301, inlet of filter channel, 302, outlet of filter channel, 303, annular sleeve seat, 4, filter screen, 5, end cover, 501, valve core seat, 502, guide groove, 503, first spring seat, 504, second spring seat, 505, embedding groove, 506, impurity accommodating groove, 6, valve core, 601, sealing head, 602, sliding rod, 603, sealing element, 7, return spring. DETAILED DESCRIPTION

[0022] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely exemplary of the application and is not intended to limit the scope of the application in any way. Throughout the specification, like reference numerals refer to like elements between which no substantial differences exist.

[0023] In the drawings, the thicknesses of the objects, sizes of the structures, and the like are exaggerated for the convenience of explanation. The drawings are merely schematic and are not intended to be drawn to scale.

[0024] It should also be understood that the words "comprise", "have", "contain", "including", when used in this specification, indicate the presence of the stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0025] As shown in Figure 1 and Figure 2 The present application discloses a check valve, comprising a pipeline, the pipeline comprising a first channel 1, a second channel 2 and a filter channel 3, the filter channel 3 being arranged between the first channel 1 and the second channel 2, and a filter screen 4 being arranged in the filter channel 3. The inlet 301 of the filter channel is connected to the outlet of the first channel 1, and the outlet 302 of the filter channel is connected to the inlet of the second channel 2. After the fluid enters the first channel 1, it is filtered by the filter channel 3 and then flows out of the second channel 2.

[0026] The filter channel 3 is arranged obliquely, the inlet 301 of the filter channel is arranged at the highest end of the filter channel 3, and the outlet 302 of the filter channel is arranged on the side wall of the filter channel 3. An opening is arranged at the lowest end of the filter channel 3, and an end cap 5 is detachably connected to the opening. A check valve assembly is arranged in the filter channel 3, and the check valve assembly comprises a valve core 6 and a return elastic member.

[0027] The end cover 5 is provided with a valve core seat 501 located in the filter channel 3. The valve core seat 501 is provided with a guide groove 502 coaxial with the filter channel 3. The valve core 6 comprises a sealing head 601 and a sliding rod 602. One end of the sliding rod 602 is connected to the sealing head 601, and the other end of the sliding rod 602 is slidingly fitted in the guide groove 502. A return spring is installed between the valve core seat 501 and the valve core 6. The valve core seat 501 is provided with a first spring seat 503 located at the opening of the guide groove 502. The side wall of the valve core 6 is provided with a second spring seat 504 located at the connection between the sealing head 601 and the sliding rod 602. The return spring is a return spring 7 sleeved on the sliding rod 602. One end of the return spring 7 is sleeved on the first spring seat 503, and the other end of the return spring 7 is sleeved on the second spring seat 504. The sealing head 601 of the valve core 6 is abutted at the inlet 301 of the filter channel under the action of the return spring 7 to seal the inlet 301 of the filter channel. The side of the sealing head 601 close to the inlet 301 of the filter channel is provided with a sealing member for abutting at the inlet 301 of the filter channel.

[0028] The filter screen 4 is in a cylindrical structure. The inlet 301 of the filter channel and the inner cavity of the filter screen 4 are in communication with each other. The outlet 302 of the filter channel is located on the outer side of the filter screen 4. The check valve assembly is located in the inner cavity of the filter screen 4. Fluid flows into the filter channel from the inlet 301, is filtered by the filter screen 4, and then flows out from the outlet 302 of the filter channel. The inlet 301 of the filter channel is provided with an annular sleeve seat 303 formed by extending the edge of the inlet 301 of the filter channel towards the filter channel 3. The sealing member of the valve core 6 is abutted on the inner side of the annular sleeve seat 303. One end of the filter screen 4 is sleeved outside the annular sleeve seat 303. The inner side of the end cover 5 is provided with an embedded groove 505, and the other end of the filter screen 4 is inserted into the embedded groove 505. The inner side of the end cover 5 is also provided with a impurity containing groove 506 located on the inner side of the embedded groove 505.

[0029] As Figure 3As shown, the application discloses a check valve, when in use, fluid enters the first channel 1, opens the valve core 6 of the check valve assembly, enters the inlet 301 of the filtering channel, is filtered by the filtering screen 4, flows out from the outlet 302 of the filtering channel, enters the second channel 2, and then flows out from the second channel 2; the impurities filtered by the filtering screen 4 stay in the impurity containing groove.

[0030] The application also discloses a valve with a check valve, which comprises a valve body and the check valve with the above structure, and the second channel 2 of the check valve is connected with the inlet channel of the valve body.

[0031] The above description is only the preferred embodiment of the application and is not used to limit the application, and any modification, equivalent replacement and improvement within the principle and spirit of the application are included in the protection scope of the application.

Claims

1. A check valve comprising a pipeline, said pipeline comprising a first channel (1), a second channel (2) and a filtering channel (3), said filtering channel (3) being arranged between said first channel (1) and said second channel (2); an inlet (301) of said filtering channel being connected to an outlet of said first channel (1), an outlet (302) of said filtering channel being connected to an inlet of said second channel (2); said filtering channel (3) being provided with a filtering screen (4), characterized in that: The filter channel (3) is provided with a check valve assembly, the check valve assembly comprises a valve core (6) and a return spring; the filter channel (3) is provided with a valve core seat (501), one end of the valve core (6) is slidably connected to the valve core seat (501); the return spring is installed between the valve core seat (501) and the valve core (6), and the sealing end of the valve core (6) is abutted at the inlet (301) of the filter channel under the action of the return spring, so as to seal the inlet (301) of the filter channel.

2. The check valve of claim 1, wherein: The valve core seat (501) is provided with a guide groove (502), one end of the valve core (6) is slidably connected to the guide groove (502), the valve core seat (501) is provided with a first spring seat (503), the side wall of the valve core (6) is provided with a second spring seat (504), the return spring is a return spring (7), one end of the return spring (7) is sleeved on the first spring seat (503), and the other end of the return spring (7) is sleeved on the second spring seat (504).

3. The check valve of claim 2, wherein: The valve core (6) comprises a sealing head (601) and a sliding rod (602), one end of the sliding rod (602) is connected to the sealing head (601), and the other end of the sliding rod (602) is slidably connected to the guide groove (502); the sealing head (601) is provided with a sealing element (603) on the side close to the inlet (301) of the filter channel, and the sealing element (603) is used for abutting at the inlet (301) of the filter channel.

4. The check valve according to any one of claims 1 to 3, characterized in that: The filter screen (4) is a cylindrical structure, the inlet (301) of the filter channel and the inner cavity of the filter screen (4) are in communication with each other, the outlet (302) of the filter channel is located on the outer side of the filter screen (4), the check valve assembly is located in the inner cavity of the filter screen (4), and fluid flows into the filter screen (4) from the inlet (301) of the filter channel, is filtered, and then flows out from the outlet (302) of the filter channel.

5. The check valve of claim 4, wherein: The filter channel (3) is inclined, the inlet (301) of the filter channel is arranged at the highest end of the filter channel (3), and the outlet (302) of the filter channel is arranged on the side wall of the filter channel (3); the lowest end of the filter channel (3) is provided with an opening, and the end cover (5) is detachably connected to the opening.

6. The check valve of claim 5, wherein: The inlet (301) of the filter channel is provided with an annular sleeve seat (303), one end of the filter screen (4) is sleeved outside the annular sleeve seat (303), the inner side of the end cover (5) is provided with an embedding groove (505), and the other end of the filter screen (4) is inserted into the embedding groove (505).

7. The check valve of claim 6, wherein: The edge of the inlet (301) of the filter channel extends to the direction of the filter channel (3) to form the annular sleeve seat (303), and the sealing end of the valve core (6) is abutted on the inner side of the annular sleeve seat (303).

8. The check valve of claim 5, wherein: The inner side of the end cover (5) is further provided with an impurity containing groove (506) located at the inner side of the embedding groove (505).

9. A valve with a check valve comprising a valve body, characterised in that: Further comprising the check valve according to any one of claims 1 to 8, wherein the second passage (2) of the check valve is connected with the inlet passage of the valve body.

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