An internally threaded ball check valve

Abstract

The utility model discloses a female thread ball check valve belongs to check valve technical field, a female thread ball check valve, including the valve body, install the connecting head of valve body both ends and open the female thread interface of connecting head end head inside, one end of valve body is fixedly connected with the connecting frame, the other end integral molding of valve body has the limit boss that is annular structure arrangement, the connecting frame is swinged to be connected with the reset rod of extending to valve body inside, the reset rod is installed with the sealed rubber ball of abutting with limit boss port of one end away from connecting frame, the spring is sleeved on the reset rod, one end of spring is abutted with sealed rubber ball, and the other end of spring is abutted with connecting frame, it can effectively reduce the area of sealed rubber ball and valve body inner wall contact to reduce the wear and tear of sealed rubber ball, prolongs the service life of check valve, guarantees the check effect of check valve simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and more specifically, to an internally threaded ball check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. A lift check valve is structurally similar to a gate valve, except it lacks a valve stem to drive the valve disc. The medium enters from the inlet end (a swing check valve has an angled valve disc that can rotate around an axis; its working principle is similar to that of a lift check valve). Check valves are commonly used as foot valves in water pumping systems to prevent water backflow.

[0003] Existing internal thread ball check valves typically use a ball sealed in the valve body, utilizing the buoyancy of water to achieve water flow and prevent backflow. However, during operation, the sealing ball usually rubs against the inner wall of the valve body, leading to wear of the ball head over time and causing liquid backflow. There is room for improvement, so we propose an internal thread ball check valve to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide an internally threaded ball check valve, which can effectively reduce the contact area between the sealing ball and the inner wall of the valve body, thereby reducing the wear of the sealing ball, extending the service life of the check valve, and ensuring the check valve's check function.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A threaded ball check valve includes a valve body, connectors installed at both ends of the valve body, and a threaded interface opened on the inner side of the connector end. A connecting frame is fixedly connected to one end of the valve body, and a limiting boss with an annular structure is integrally formed at the other end of the valve body.

[0009] A reset rod extending to the inside of the valve body is movably connected to the connecting frame, and a sealing ball that abuts against the port of the limiting boss is installed at the end of the reset rod away from the connecting frame.

[0010] A spring is fitted on the reset rod, one end of the spring abuts against the sealing ball, and the other end of the spring abuts against the connecting frame;

[0011] The spring is fitted with a flexible corrugated sleeve.

[0012] Furthermore, the inner wall of the connecting frame is rotatably fitted with balls that abut against the reset rod, and multiple balls are arranged in the radial position of the reset rod;

[0013] The front end of the connecting frame has an integrally formed guide boss that fits against the outer wall of the reset rod.

[0014] Furthermore, the sealing ball has a threaded hole, and the reset rod is fixedly connected to a threaded connector that is screwed into the threaded hole.

[0015] Furthermore, the end of the reset rod away from the sealing ball protrudes from the connecting frame.

[0016] Furthermore, both ends of the flexible corrugated sleeve are connected to the connecting frame and the sealing ball, respectively, and the parts of the flexible corrugated sleeve connected to the connecting frame and the sealing ball are coated with sealant.

[0017] Furthermore, a first flange is integrally formed symmetrically along the outer edge of the valve body, and a second flange is integrally formed at the end of the connector away from the internal thread interface, which is opposite to the first flange.

[0018] Furthermore, a sealing gasket is installed between the first flange and the second flange.

[0019] 3. Beneficial effects

[0020] Compared with existing technologies, the advantages of this utility model are:

[0021] (1) In this scheme, when the liquid in the pipeline flows under pressure, the sealing ball is pushed open from the limiting boss under the action of liquid pressure. At the same time, the reset rod slides with the connecting bracket and the spring sleeved on the reset rod is compressed and deformed. By sleeved with a flexible corrugated sleeve on the outside of the spring, the spring can be well protected during the expansion and contraction process, preventing the spring from rusting and extending its service life. After the liquid pressure in the pipeline decreases, the elastic force of the spring is used to reset the reset rod, so that the sealing ball abuts against the limiting boss, which plays a sealing role to prevent liquid backflow. This can effectively reduce the contact area between the sealing ball and the inner wall of the valve body, thereby reducing the wear of the sealing ball.

[0022] (2) In this solution, the ball bearings abut against the reset rod, and the wear of the reset rod can be effectively reduced by the rolling friction during the movement of the reset rod, thereby improving the service life of the reset rod. At the same time, the guide boss is used to ensure the accuracy of the reset rod during the movement. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a side view of the valve body of this utility model;

[0025] Figure 3 This is a cross-sectional view of part AA of the valve body of this utility model;

[0026] Figure 4 This is a schematic diagram of the connecting frame structure of this utility model.

[0027] Explanation of the labels in the diagram:

[0028] 1. Valve body; 2. Connector; 3. Internal threaded interface; 4. Connecting bracket; 5. Ball bearing; 6. Limiting boss; 7. Reset rod; 8. Sealing ball; 9. Spring; 10. Flexible bellows sleeve; 11. First flange; 12. Second flange. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] Example:

[0031] Please see Figure 1-4 A type of internal thread ball check valve includes a valve body 1, connectors 2 installed at both ends of the valve body 1, and an internal thread interface 3 opened on the inner side of the connector 2. A connector 4 is fixedly connected to one end of the valve body 1, and a limiting boss 6 with an annular structure is integrally formed at the other end of the valve body 1.

[0032] A reset rod 7 extending to the inside of the valve body 1 is movably connected to the connecting frame 4. A sealing ball 8 that abuts against the port of the limiting boss 6 is installed at the end of the reset rod 7 away from the connecting frame 4.

[0033] A spring 9 is fitted on the reset rod 7. One end of the spring 9 abuts against the sealing ball 8, and the other end of the spring 9 abuts against the connecting bracket 4.

[0034] The spring 9 is fitted with a flexible corrugated sleeve 10.

[0035] It should be noted that, in use, this internally threaded ball check valve connects to the pipeline via the internally threaded interface 3 at the end of the connector 2 installed at both ends of the valve body 1. When the liquid in the pipeline flows under pressure, the liquid pressure pushes the sealing ball 8 away from the limiting boss 6, causing the reset rod 7 to slide in conjunction with the connecting bracket 4, and compressing the spring 9 sleeved on the reset rod 7. By sleeved with a flexible corrugated sleeve 10 on the outside of the spring 9, the spring 9 can be well protected during its expansion and contraction, preventing corrosion and extending its service life. After the liquid pressure in the pipeline decreases, the elastic force of the spring 9 causes the reset rod 7 to return to its original position, thereby causing the sealing ball 8 to abut against the limiting boss 6, achieving a sealing effect and preventing liquid backflow. This effectively reduces the contact area between the sealing ball 8 and the inner wall of the valve body 1, thereby reducing the wear of the sealing ball 8.

[0036] like Figure 3 , Figure 4 As shown, the inner wall of the ring of the connecting frame 4 is rolled with balls 5 that abut against the reset rod 7, and multiple balls 5 are arranged in the radial position of the reset rod 7.

[0037] The front end of the ring of the connecting frame 4 is integrally formed with a guide boss that fits against the outer wall of the reset rod 7;

[0038] It should be noted that by the contact between the ball bearing 5 and the reset rod 7, the rolling friction of the reset rod 7 during movement can effectively reduce the wear of the reset rod 7, thereby improving the service life of the reset rod 7. At the same time, the guide boss is used to ensure the accuracy of the reset rod 7 during movement.

[0039] like Figure 3 As shown, the sealing ball 8 has a threaded hole, and the reset rod 7 is fixedly connected to a threaded connector that is screwed into the threaded hole.

[0040] It should be noted that this facilitates the assembly between the reset rod 7 and the sealing ball 8.

[0041] like Figure 3 As shown, the end of the reset rod 7 away from the sealing ball 8 protrudes from the connecting frame 4;

[0042] It should be noted that this effectively prevents the reset rod 7 from detaching from the connecting frame 4 during movement.

[0043] like Figure 3 As shown, the two ends of the flexible corrugated sleeve 10 are connected to the connecting frame 4 and the sealing ball 8 respectively, and the part of the flexible corrugated sleeve 10 connected to the connecting frame 4 and the sealing ball 8 is coated with sealant.

[0044] It should be noted that by sealing the spring 9 inside the flexible corrugated sleeve 10, the spring 9 can be well protected during the expansion and contraction process, preventing corrosion and extending its service life.

[0045] like Figure 1 As shown, a first flange 11 is integrally formed symmetrically along the outer edge of the valve body 1, and a second flange 12 is integrally formed at the end of the connector 2 away from the internal thread interface 3, which is opposite to the first flange 11. A sealing gasket is installed between the first flange 11 and the second flange 12.

[0046] It should be noted that this facilitates the connection between the connector 2 and the valve body 1, while ensuring the sealing effect of the connection between the first flange 11 and the second flange 12.

[0047] In use: The valve body 1 is connected to the pipeline via the internal threaded interface 3 at the end of the connector 2 installed at both ends. When the liquid in the pipeline flows under pressure, the liquid pressure pushes the sealing ball 8 away from the limiting boss 6. At the same time, the reset rod 7 slides with the connecting bracket 4, and the spring 9 sleeved on the reset rod 7 is compressed and deformed. By sleeved with a flexible corrugated sleeve 10 on the outside of the spring 9, the spring 9 can be well protected during the expansion and contraction process, preventing the spring 9 from rusting and extending its service life. After the liquid pressure in the pipeline decreases, the elastic force of the spring 9 resets the reset rod 7, so that the sealing ball 8 abuts against the limiting boss 6, thus sealing and preventing liquid backflow.

[0048] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A threaded ball check valve, comprising a valve body (1), connectors (2) mounted at both ends of the valve body (1), and a threaded interface (3) formed on the inner side of the connector (2), characterized in that: One end of the valve body (1) is fixedly connected to a connecting frame (4), and the other end of the valve body (1) is integrally formed with a limiting boss (6) in a ring structure. A reset rod (7) extending to the inside of the valve body (1) is movably connected to the connecting frame (4). A sealing ball (8) that abuts against the port of the limiting boss (6) is installed at the end of the reset rod (7) away from the connecting frame (4). A spring (9) is sleeved on the reset rod (7), one end of the spring (9) abuts against the sealing ball (8), and the other end of the spring (9) abuts against the connecting frame (4); The spring (9) is covered with a flexible corrugated sleeve (10).

2. The internally threaded ball check valve according to claim 1, characterized in that: The inner wall of the connecting frame (4) is rolled with balls (5) that abut against the reset rod (7), and multiple balls (5) are arranged in the radial position of the reset rod (7); The front end of the ring of the connecting frame (4) is integrally formed with a guide boss that fits against the outer wall of the reset rod (7).

3. The internally threaded ball check valve according to claim 1, characterized in that: The sealing ball (8) has a threaded hole, and the reset rod (7) is fixedly connected to a threaded connector that is screwed into the threaded hole.

4. A threaded ball check valve according to claim 1, characterized in that: The end of the reset rod (7) away from the sealing ball (8) protrudes from the connecting frame (4).

5. A threaded ball check valve according to claim 1, characterized in that: The two ends of the flexible corrugated sleeve (10) are connected to the connecting frame (4) and the sealing ball (8) respectively, and the part of the flexible corrugated sleeve (10) connected to the connecting frame (4) and the sealing ball (8) is coated with sealant.

6. A threaded ball check valve according to claim 1, characterized in that: The valve body (1) has a first flange (11) integrally formed symmetrically along the outer edge of its end, and the connector (2) has a second flange (12) integrally formed at the end away from the internal thread interface (3) that is opposite to the first flange (11).

7. A threaded ball check valve according to claim 6, characterized in that: A sealing gasket is installed between the first flange (11) and the second flange (12).

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