A structure of axial flow check valve avoiding gas backflow

Abstract

The utility model discloses a kind of axial flow check valve structures of avoiding gas backflow, it is related to check valve technical field, including valve body, the air inlet and exhaust port are respectively set in the both sides of valve body, cleaning mechanism is set between the air inlet and exhaust port, in the utility model, blowoff pipe is fixedly connected with valve body, spiral guide vane is inserted with positioning ring, rotating reinforcing ring, make reinforcing ring one side and spiral guide vane adhere, realize the limiting of spiral guide vane, the impurity deposited in the inside of valve body can be cleaned by the rotation of spiral guide vane, guide cover can be oriented for impurity and airflow, impurity can be discharged by exhaust port and blowoff pipe, reduce the residue of impurity in the inside of valve body, ensure that piston main body normally slides and check valve is normally used, auxiliary ring one side and sealing plug adhere, can realize the stable installation of sealing plug in piston main body one side, the disassembly replacement of sealing plug is convenient.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and in particular to an axial flow check valve structure that prevents gas backflow. Background Technology

[0002] A check valve (also known as a one-way valve or non-return valve) is an automatic valve whose core function is to control the flow of fluid (liquid, gas, or steam) in a pipeline so that it can only flow in one direction, while preventing the fluid from flowing back in the opposite direction, thereby protecting the pipeline system, equipment (such as pumps and compressors), or preventing media contamination.

[0003] For example, Chinese patent CN210164957U discloses a novel axial flow check valve structure, including a valve body, a piston device, a return spring, a support, and a limiting shaft. The piston device includes a pressure plate, a sealing gasket, and a guide rod. The pressure plate is located in the middle of the upper end face of the guide rod, and a sealing gasket is provided in the gap between the pressure plate and the guide rod. A screw is provided in the middle of the pressure plate, and the installation direction of the screw is coaxial with the guide rod. The pressure plate and the guide rod are fixed by the screw. The piston device passes through the return spring and is reset by the return spring. An air inlet and an air outlet are provided on both sides of the valve body. After the air enters through the air inlet, the piston device presses against the air inlet.

[0004] In the aforementioned patent, although the problem of leakage that is easy to occur when the check valve seals the exhaust is solved by composite sealing, when the gas contains particulate impurities, the impurities are easy to deposit in the gap between the piston device and the valve body, which hinders the normal sliding of the piston, causing the valve to not be completely closed and affecting the normal use of the valve. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where, when the gas contains particulate impurities, the impurities easily deposit in the gap between the piston device and the valve body, hindering the normal sliding of the piston, causing the valve to fail to close completely and affecting the normal use of the valve. Therefore, this invention proposes an axial flow check valve structure to prevent gas backflow.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an axial flow check valve structure to prevent gas backflow, comprising a valve body, with an air inlet and an exhaust outlet respectively opened on both sides of the valve body, and a cleaning mechanism provided between the air inlet and the exhaust outlet, the cleaning mechanism comprising a drain pipe, a flow guide shroud and a spiral flow guide vane, one end of the drain pipe being threadedly connected to a sealing cap, and the other end being fixedly connected to the valve body, the inner wall of the valve body being fixedly connected to the flow guide shroud, the spiral flow guide vane being rotatably connected to the inner wall of the valve body, a piston body being inserted through the spiral flow guide vane, and a connecting rod being fixedly connected to the inner annular surface of the piston body.

[0007] Preferably, a reinforcing ring is attached to one side of the spiral guide vane, and the reinforcing ring is connected to the piston body by a thread.

[0008] Preferably, a positioning ring is inserted into one end of the spiral guide vane, the spiral guide vane and the positioning ring are rotatably connected, the positioning ring is penetrated by the piston body, and the inner ring surface of the positioning ring is fixedly connected to the piston body. An internal component is attached to one side of the positioning ring, and the internal component is fixedly connected to the inner wall of the valve body.

[0009] Preferably, the inner wall of the valve body is bolted to support frame one and support frame two, both of which are penetrated by a connecting rod, and the connecting rod is slidably connected to support frame one and support frame two.

[0010] Preferably, a spring is installed on one side of the support frame, and one end of the spring is fixedly connected to the piston body.

[0011] Preferably, an annular groove is provided on one side of the piston body, a sealing ring is inserted into the annular groove, a sealing plug is fixedly connected to the inner annular surface of the sealing ring, the sealing plug is penetrated by a connecting rod, and the sealing plug and the connecting rod are slidably connected.

[0012] Preferably, an auxiliary ring is attached to one side of the sealing plug, the auxiliary ring is connected to the connecting rod by a thread, and a plug rod is inserted into one side of the auxiliary ring, with one end of the plug rod fixedly connected to the second support frame.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the spiral guide vane is rotatably connected to the piston body, the drain pipe is fixedly connected to the valve body, the spiral guide vane is inserted into the positioning ring, and the reinforcing ring is rotated so that one side of the reinforcing ring fits against the spiral guide vane, thereby limiting the spiral guide vane. The rotation of the spiral guide vane can clean the impurities deposited inside the valve body. The guide shroud can guide the impurities and airflow. The exhaust port and drain pipe can assist in the discharge of impurities, reduce the residue of impurities inside the valve body, and ensure the normal sliding of the piston body and the normal use of the check valve.

[0015] 2. In this utility model, the plug rod is plugged into the auxiliary ring, and the sealing ring is plugged into the annular groove. When the sealing ring is inserted into the annular groove and the auxiliary ring is rotated, one side of the auxiliary ring fits against the sealing plug, which can realize the stable installation of the sealing plug on one side of the piston body, making it easy to disassemble and replace the sealing plug. The sealing ring can provide sealing protection for the connection between the sealing plug and the piston body, thereby ensuring the sealing effect of the piston body and the sealing plug during use. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of an axial flow check valve structure that prevents gas backflow is presented in this utility model.

[0017] Figure 2A schematic diagram of the support frame structure for an axial flow check valve structure that prevents gas backflow is provided for this utility model.

[0018] Figure 3 This utility model proposes a piston body structure installation diagram for an axial flow check valve structure that avoids gas backflow.

[0019] Figure 4 An explosion diagram of the sealing plug structure of an axial flow check valve structure that prevents gas backflow is provided for this utility model.

[0020] Legend: 1. Valve body; 2. Sealing cap; 3. Drain pipe; 4. Internal component; 5. Flow guide; 6. Support frame one; 7. Positioning ring; 8. Spiral guide vane; 9. Reinforcing ring; 10. Connecting rod; 11. Piston body; 12. Sealing plug; 13. Support frame two; 14. Auxiliary ring; 15. Sealing ring; 16. Annular groove; 17. Spring; 18. Insert rod. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: Refer to Figures 1-4 As shown: An axial flow check valve structure to prevent gas backflow includes a valve body 1. An inlet and an outlet are respectively opened on both sides of the valve body 1. A cleaning mechanism is provided between the inlet and outlet. The cleaning mechanism includes a drain pipe 3, a flow guide shroud 5, and a spiral flow guide vane 8. One end of the drain pipe 3 is threadedly connected to a sealing cap 2, and the other end is fixedly connected to the valve body 1. The inner wall of the valve body 1 is fixedly connected to the flow guide shroud 5. The spiral flow guide vane 8 is rotatably connected to the inner wall of the valve body 1, and a through-hole is inserted inside the spiral flow guide vane 8. A piston body 11 is provided, and a connecting rod 10 is fixedly connected to the inner ring surface of the piston body 11. A reinforcing ring 9 is attached to one side of the spiral guide vane 8. The reinforcing ring 9 is threadedly connected to the piston body 11. A positioning ring 7 is inserted into one end of the spiral guide vane 8. The spiral guide vane 8 and the positioning ring 7 are rotatably connected. The positioning ring 7 is penetrated by the piston body 11, and the inner ring surface of the positioning ring 7 is fixedly connected to the piston body 11. An internal component 4 is attached to one side of the positioning ring 7. The internal component 4 is fixedly connected to the inner wall of the valve body 1.

[0024] By using the fixed connection between the drain pipe 3 and the valve body 1, particles or impurities at the bottom of the inner cavity of the valve body 1 can enter the drain pipe 3 and be discharged through the bottom of the drain pipe 3. The flow guide shroud 5 can guide the flow of gas. By using the rotation of the spiral guide vane 8 inside the valve body 1, the residual impurities inside the valve body 1 can be cleaned, reducing the accumulation of impurities inside the valve body 1. The positioning ring 7 and the reinforcing ring 9 can limit the two ends of the spiral guide vane 8 respectively, thereby ensuring the stability of the spiral guide vane 8 when rotating and reducing the axial displacement of one end of the spiral guide vane 8. By fitting the positioning ring 7 with the built-in part 4, one end of the built-in part 4 can be sealed when the valve is not in use.

[0025] Example 2: Figures 1-4 As shown, the inner wall of the valve body 1 is bolted with a support frame 6 and a support frame 13. Both support frames 6 and 13 are penetrated by a connecting rod 10, and the connecting rod 10 is slidably connected to support frames 6 and 13. A spring 17 is installed on one side of support frame 6, and one end of the spring 17 is fixedly connected to the piston body 11. An annular groove 16 is provided on one side of the piston body 11. A sealing ring 15 is inserted into the annular groove 16. A sealing plug 12 is fixedly connected to the inner annular surface of the sealing ring 15. The sealing plug 12 is penetrated by the connecting rod 10, and the sealing plug 12 is slidably connected to the connecting rod 10. An auxiliary ring 14 is attached to one side of the sealing plug 12. The auxiliary ring 14 is threadedly connected to the connecting rod 10, and a plug rod 18 is inserted into one side of the auxiliary ring 14. One end of the plug rod 18 is fixedly connected to support frame 13.

[0026] Bolts can be used to install support frame 16 and support frame 23 inside valve body 1. Support frame 16 and support frame 23 are slidably connected to connecting rod 10. When connecting rod 10 moves, support frame 16 and support frame 23 can guide it and reduce positional displacement of connecting rod 10. Spring 17 can assist in the reset of piston body 11 and connecting rod 10. The connection between sealing ring 15 and annular groove 16 can seal and protect the connection between sealing plug 12 and piston body 11. The auxiliary ring 14 is threadedly connected to connecting rod 10. The auxiliary ring 14 applies force to sealing plug 12, making sealing plug 12 fit tightly with piston body 11. The insertion rod 18 is inserted into the auxiliary ring 14 to limit the position of auxiliary ring 14 and facilitate the subsequent disassembly and replacement of sealing plug 12.

[0027] The usage and working principle of this device are as follows: First, when the entire check valve is in use, connect the inlet and outlet ports respectively. The airflow pushes the sealing plug 12 to move, and the connecting rod 10 slides between the support frame 1 (6) and the support frame 2 (13). The auxiliary ring 14 moves with the connecting rod 10, causing the sealing plug 12 to move out of the internal component 4. The insertion rod 18 separates from the auxiliary ring 14, and air flows inside the valve body 1 and is discharged through the outlet port. During the airflow, the spiral guide vane 8 is driven to rotate on the outer ring surface of the piston body 11. The spiral guide vane 8 scrapes the inner wall of the valve body 1, guiding impurities to flow spirally along the axial direction for self-cleaning flushing. Gas and impurities are guided through the guide shroud 5 and discharged through the outlet port, reducing residue inside the valve body 1. When the check valve is not in use, the spring 1... 7. Drive the piston body 11 and the sealing plug 12 to reset. Positioning ring 7 fits with the built-in part 4. The plug rod 18 on one side of the support frame 13 is inserted into the auxiliary ring 14 to limit the sealing plug 12. Impurities are collected in the drain pipe 3 through the bottom of the inclined valve body 1 cavity. At this time, the sealing cover 2 at the bottom of the drain pipe 3 can be opened to help discharge impurities inside the valve body 1. When the sealing plug 12 needs to be disassembled and replaced, the bolt can be turned in the air inlet of the valve body 1 to separate the support frame 13 from the inner wall of the valve body 1. Move the support frame 13 to separate the plug rod 18 from the sealing plug 12. Then rotate the plug rod 18 to take the plug rod 18 out of the valve body 1. Move the sealing plug 12 to separate the sealing ring 15 from the piston body 11. The sealing plug 12 can then be taken out and replaced.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An axial flow check valve structure for preventing gas backflow, comprising a valve body (1), wherein an inlet and an outlet are respectively provided on both sides of the valve body (1), characterized in that: A cleaning mechanism is provided between the air inlet and the exhaust outlet. The cleaning mechanism includes a drain pipe (3), a flow guide (5), and a spiral flow guide (8). One end of the drain pipe (3) is connected to a sealing cap (2) by a thread, and the other end is fixedly connected to the valve body (1). The inner wall of the valve body (1) is fixedly connected to the flow guide (5). The spiral flow guide (8) is rotatably connected to the inner wall of the valve body (1). A piston body (11) is inserted through the spiral flow guide (8). A connecting rod (10) is fixedly connected to the inner ring surface of the piston body (11).

2. The axial flow check valve structure for preventing gas backflow according to claim 1, characterized in that: A reinforcing ring (9) is attached to one side of the spiral guide vane (8), and the reinforcing ring (9) is connected to the piston body (11) by a thread.

3. The axial flow check valve structure for preventing gas backflow according to claim 1, characterized in that: One end of the spiral guide vane (8) is inserted with a positioning ring (7), the spiral guide vane (8) and the positioning ring (7) are rotatably connected, the positioning ring (7) is penetrated by the piston body (11), and the inner ring surface of the positioning ring (7) is fixedly connected to the piston body (11). An internal component (4) is attached to one side of the positioning ring (7), and the internal component (4) is fixedly connected to the inner wall of the valve body (1).

4. The axial flow check valve structure for preventing gas backflow according to claim 1, characterized in that: The inner wall of the valve body (1) is connected by bolts to support frame one (6) and support frame two (13). Both support frame one (6) and support frame two (13) are penetrated by connecting rod (10), and the connecting rod (10) is slidably connected to support frame one (6) and support frame two (13).

5. The axial flow check valve structure for preventing gas backflow according to claim 4, characterized in that: A spring (17) is installed on one side of the support frame (6), and one end of the spring (17) is fixedly connected to the piston body (11).

6. The axial flow check valve structure for preventing gas backflow according to claim 5, characterized in that: The piston body (11) has an annular groove (16) on one side. A sealing ring (15) is inserted inside the annular groove (16). A sealing plug (12) is fixedly connected to the inner annular surface of the sealing ring (15). The sealing plug (12) is penetrated by the connecting rod (10). The sealing plug (12) and the connecting rod (10) are slidably connected.

7. The axial flow check valve structure for preventing gas backflow according to claim 6, characterized in that: An auxiliary ring (14) is attached to one side of the sealing plug (12). The auxiliary ring (14) is connected to the connecting rod (10) by a thread, and a plug rod (18) is inserted into one side of the auxiliary ring (14). One end of the plug rod (18) is fixedly connected to the second support frame (13).

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