Axial-flow type check valve

Abstract

The utility model relates to the technical field of check valves, in particular to an axial flow type check valve which comprises a main body, an abutting block and a connecting block, the main body comprises a valve body, connecting flanges are arranged at the two ends of the valve body, a fixing block is arranged in an inner cavity of the valve body, the fixing block is located at the discharging end of the valve body, a sealing block is arranged in the inner cavity of the valve body, and the sealing block is located at the discharging end of the valve body. The sealing block is located at the feeding end of the valve body, the abutting blocks are located in an inner cavity of the valve body, the connecting blocks are located on the two sides of the top of the valve body and are symmetrically distributed, an annular sealing groove is formed in the side, close to the fixing block, of the sealing block, and the outer sides of the protruding ends of the abutting blocks are in tangent fit with the inner wall of the sealing block. One side of the protruding end of the abutting block is fixedly connected with an annular limiting block, and the limiting block is matched with the sealing groove. And a limiting block and a sealing groove are arranged, so that the sealing performance of the device is further improved, and the device can operate more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an axial flow check valve. Background Art

[0002] A check valve is a valve that has a circular disc as the opening and closing part and blocks the backflow of the medium by its own weight and the pressure of the medium. It belongs to the category of automatic valves, also known as non-return valves, one-way valves, reflux valves or isolation valves. The disc movement mode is divided into lift type and swing type. The lift check valve is similar to the stop valve in structure, only lacking the valve stem that drives the disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. On the contrary, when the medium flows back, the valve is closed. The swing check valve has a disc that is tilted and can rotate around the axis, and its working principle is similar to that of the lift check valve. Check valves are often used as bottom valves of pumping devices to prevent water backflow. The combination of check valves and stop valves can play a role in safety isolation. The disadvantage is that the resistance is large and the sealing is poor when closed.

[0003] The existing axial flow check valve has only one side sealing device, which has poor sealing performance, resulting in unstable working quality of the axial flow check valve, and the axial flow check valve is round as a whole and is not convenient for users to take. Utility Model Content

[0004] In view of the above problems existing in the prior art, an axial flow check valve is now provided.

[0005] The specific technical solutions are as follows:

[0006] An axial flow check valve is designed, comprising a main body, a stop block and a connecting block, the main body comprising a valve body, connecting flanges are provided at both ends of the valve body, a fixing block is provided in the inner cavity of the valve body, the fixing block is located at the discharge end of the valve body, a sealing block is provided in the inner cavity of the valve body, the sealing block is located at the feed end of the valve body, the stop block is located in the inner cavity of the valve body, and the connecting blocks are located on both sides of the top of the valve body and are distributed symmetrically.

[0007] Preferably, connecting flanges are fixedly connected at both ends of the valve body, a fixing block is provided in the inner cavity of the valve body, a connecting rod is fixedly connected to the top of the fixing block, one end of the connecting rod away from the fixing block is fixedly connected to the inner wall of the valve body, and the connecting rods are evenly distributed on the outer side of the fixing block.

[0008] Preferably, the sealing block is annular, located in the inner cavity of the valve body and fixedly connected to the inner wall of the discharge end of the valve body on the outer side, and an annular sealing groove is provided on one side of the sealing block close to the fixed block.

[0009] Preferably, the stop block is located in the inner cavity of the valve body and has a convex cross-section, the outer side of the convex end of the stop block fits into the inner wall of the sealing block, and an annular limit block is fixedly connected to one side of the protruding end of the stop block, and the limit block fits into the sealing groove.

[0010] Preferably, one end of the stop block away from the sealing block is fixedly connected to a spring, and one end of the spring away from the stop block is fixedly connected to the fixing block.

[0011] Preferably, handles are provided on both sides of the top of the valve body, and the handles are in an inverted U shape with both ends fixedly connected to the top of the connecting block.

[0012] Preferably, a column is fixedly connected to one side of the fixing block close to the sealing block, the column is T-shaped and passes through the stop block, and the stop block moves on the column.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] 1. Connect the connecting flanges at both ends of the valve body of the device with the connecting flanges of the pipeline through fasteners, so that the device connects two sections of pipelines. The liquid enters the valve body from the feed end of the valve body, and the liquid impacts the block, which moves backward on the column. The block compresses the spring, so that the block is located in the center of the inner cavity of the valve body. The liquid passes through the valve body and enters the next section of the pipeline from the discharge end of the valve body. When the liquid in the pipeline enters the valve body from the discharge end of the valve body, the liquid impacts the block and the block moves forward on the column. The block stretches the spring, and then the end of the block away from the spring is embedded in the sealing block, and the limit block on the block is embedded in the sealing groove, so as to prevent the liquid from flowing back. The limit block and the sealing groove are provided to further improve the sealing performance of the device, which is conducive to more stable operation of the device.

[0015] 2. Handles are provided on both sides of the top of the valve body. The handles are in the shape of an inverted U and both ends are fixedly connected to the top of the connecting block. The handles are provided to facilitate the user to move the device through the handles, thereby improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The embodiments of the present invention will be described more fully with reference to the attached drawings, which are however only used for illustration and description and are not intended to limit the scope of the present invention.

[0017] Figure 1 This is a structural schematic diagram of an axial flow check valve proposed by the utility model;

[0018] Figure 2 This is a structural cross-sectional view of an axial flow check valve proposed by the utility model;

[0019] Figure 3This is a structural schematic diagram of a sealing block in an axial flow check valve proposed by the utility model;

[0020] Figure 4 The utility model discloses an axial flow check valve having a handle.

[0021] The above-mentioned figure numerals represent: 1. main body; 10. column; 11. valve body; 12. connecting flange; 13. fixing block; 14. connecting rod; 15. spring; 2. stop block; 21. limit block; 22. sealing block; 23. sealing groove; 3. connecting block; 33. handle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0025] Reference Figure 1-4 , an axial flow check valve, including a main body 1, a stop block 2 and a connecting block 3, the main body 1 includes a valve body 11, connecting flanges 12 are provided at both ends of the valve body 11, a fixing block 13 is provided in the inner cavity of the valve body 11, the fixing block 13 is located at the discharge end of the valve body 11, a sealing block 22 is provided in the inner cavity of the valve body 11, the sealing block 22 is located at the feed end of the valve body 11, the stop block 2 is located in the inner cavity of the valve body 11, and the connecting blocks 3 are located on both sides of the top of the valve body 11 and are symmetrically distributed; the main body 1 is an axial flow check valve.

[0026] Furthermore, connecting flanges 12 are fixedly connected to both ends of the valve body 11, a fixing block 13 is provided in the inner cavity of the valve body 11, a connecting rod 14 is fixedly connected to the top of the fixing block 13, one end of the connecting rod 14 away from the fixing block 13 is fixedly connected to the inner wall of the valve body 11, and the connecting rods 14 are evenly distributed on the outer side of the fixing block 13; the connecting flange 12 is used to facilitate the connection of the main body 1 with other devices.

[0027] Furthermore, the sealing block 22 is annular, located in the inner cavity of the valve body 11 and fixedly connected to the inner wall of the discharge end of the valve body 11 on the outer side, and an annular sealing groove 23 is provided on the side of the sealing block 22 close to the fixed block 13; the sealing block 22 is provided to facilitate the cooperation with the stop block 2 to improve the sealing performance of the main body 1.

[0028] Furthermore, the stop block 2 is located in the inner cavity of the valve body 11 and has a convex cross-section. The outer side of the convex end of the stop block 2 fits with the inner wall of the sealing block 22. One side of the protruding end of the stop block 2 is fixedly connected with an annular limit block 21, and the limit block 21 fits with the sealing groove 23. The sealing groove 23 and the limit block 21 are provided to facilitate further coordination with the sealing block 22 and the stop block 2 to improve the sealing performance of the main body 1.

[0029] Furthermore, one end of the stop block 2 away from the sealing block 22 is fixedly connected to a spring 15, and one end of the spring 15 away from the stop block 2 is fixedly connected to the fixed block 13; the outer side of the stop block 2 does not contact the inner wall of the valve body 11; when the main body 1 is not working, the spring 15 is in a normal state, and the stop block 2 is close to the room sealing block 22.

[0030] Furthermore, handles 33 are provided on both sides of the top of the valve body 11. The handles 33 are in an inverted U shape and both ends are fixedly connected to the top of the connecting block 3. The handles 33 are provided to facilitate the user to move the device through the handles 33, thereby improving the convenience of using the device.

[0031] Furthermore, a column 10 is fixedly connected to one side of the fixed block 13 close to the sealing block 22. The column 10 is T-shaped and passes through the stop block 2, and the stop block 2 moves on the column 10. One end of the column 10 away from the fixed block 13 extends out of the outer side of the side of the sealing block 22 away from the fixed block 13. The column 10 is provided to facilitate limiting the moving trajectory of the stop block 2.

[0032] Working principle: When using this device, the connecting flanges 12 at both ends of the valve body 11 of the device are connected to the connecting flanges of the pipeline through fasteners, so that the device connects two sections of the pipeline, and the liquid enters the valve body 11 from the feed end of the valve body 11, and the liquid impacts the block 2, and the block 2 moves backward on the column 10, and the block 2 compresses the spring 15, so that the block 2 is located in the center of the inner cavity of the valve body 11, and the liquid passes through the block 2 and enters the next section of the pipeline from the discharge end of the valve body 11. When the liquid in the pipeline enters the valve body 11 from the discharge end of the valve body 11, the liquid impacts the block 2 and the block 2 moves forward on the column 10, and the block 2 stretches the spring 15, and then the end of the block 2 away from the spring 15 is embedded in the sealing block 22, and the limit block 21 on the block 2 is embedded in the sealing groove 23, thereby preventing the liquid from flowing back; the limit block 21 and the sealing groove 23 are provided to further improve the sealing performance of the device, which is conducive to more stable operation of the device.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An axial flow check valve, characterized in that: The invention comprises a main body (1), a stopper (2) and a connecting block (3), wherein the main body (1) comprises a valve body (11), connecting flanges (12) are provided at both ends of the valve body (11), a fixing block (13) is provided in the inner cavity of the valve body (11), the fixing block (13) is located at the discharge end of the valve body (11), a sealing block (22) is provided in the inner cavity of the valve body (11), the sealing block (22) is located at the feed end of the valve body (11), the stopper (2) is located in the inner cavity of the valve body (11), and the connecting blocks (3) are located on both sides of the top of the valve body (11) and are symmetrically distributed.

2. An axial flow check valve according to claim 1, characterized in that: Connecting flanges (12) are fixedly connected at both ends of the valve body (11); a fixing block (13) is provided in the inner cavity of the valve body (11); a connecting rod (14) is fixedly connected to the top of the fixing block (13); one end of the connecting rod (14) away from the fixing block (13) is fixedly connected to the inner wall of the valve body (11); and the connecting rods (14) are evenly distributed on the outer side of the fixing block (13).

3. An axial flow check valve according to claim 1, characterized in that: The sealing block (22) is annular, located in the inner cavity of the valve body (11) and fixedly connected on its outer side to the inner wall of the discharge end of the valve body (11), and an annular sealing groove (23) is provided on one side of the sealing block (22) close to the fixed block (13).

4. An axial flow check valve according to claim 3, characterized in that: The stop block (2) is located in the inner cavity of the valve body (11) and has a convex cross-section. The outer side of the convex end of the stop block (2) fits into the inner wall of the sealing block (22). An annular limit block (21) is fixedly connected to one side of the protruding end of the stop block (2), and the limit block (21) fits into the sealing groove (23).

5. The axial flow check valve according to claim 1, characterized in that: One end of the stop block (2) away from the sealing block (22) is fixedly connected to a spring (15), and one end of the spring (15) away from the stop block (2) is fixedly connected to the fixing block (13).

6. An axial flow check valve according to claim 1, characterized in that: Handles (33) are provided on both sides of the top of the valve body (11); the handles (33) are in the shape of an inverted U and have both ends fixedly connected to the top of the connection block (3).

7. An axial flow check valve according to claim 1, characterized in that: A column (10) is fixedly connected to one side of the fixing block (13) close to the sealing block (22); the column (10) is T-shaped and passes through the stop block (2); and the stop block (2) moves on the column (10).

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