Spherical check valve

Abstract

The utility model belongs to the technical field of check valves, and particularly relates to a spherical check valve which comprises a valve body. A non-return cavity is formed in the valve body; a vertical rod is clamped in the non-return cavity; the surface of the vertical rod is connected with a hollow check ball in a sliding manner; the surface of the vertical rod is slidably connected with a floating plate; a limiting spring sleeves the top of the floating plate and is positioned on the surface of the vertical rod; the hollow non-return ball is arranged in the non-return cavity and limited through the vertical rod, the vertical rod and the hollow non-return ball are in non-fixed connection, when the surface of the vertical rod is rusted and needs to be replaced, a rotating spline can be opened, the vertical rod is taken out of the valve body, and therefore rapid replacement can be carried out, and meanwhile other connected objects do not need to be detached; the maintenance cost is reduced, and the use adaptability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, in particular to a spherical check valve. Background Art

[0002] A check valve, also known as a non-return valve, a non-return valve, a backflow valve, etc., is a valve specifically used to prevent the backflow of media. Its main function is to allow the fluid to flow in one direction and prevent the flow in the opposite direction. Check valves are usually used in pipeline systems to ensure that the fluid flows in one direction in the pipeline. A valve disc or valve wing is set so that it can be opened smoothly during forward flow and automatically closed during reverse flow to prevent the backflow of the media.

[0003] A Chinese patent with publication number CN214197409U discloses a ball check valve, comprising a valve body, the valve body comprising an inlet section, a sealing section and an outlet section, a sealing ball is arranged inside the sealing section, the sealing ball is held against a channel connected to the water inlet section at the bottom of the sealing section, a connecting rod is vertically fixed to the upper part of the sealing ball, a sleeve located outside the connecting rod is fixed to the top of the sealing section, a retaining frame is arranged inside the sleeve, a threaded cover is arranged on the top of the sleeve, an inverted concave fixing frame is fixed to the upper end of the cover, a threaded hole is arranged on the top of the fixing frame, a threaded screw is vertically arranged in the threaded hole, a lower pressure plate is fixed to the top of the connecting rod, an upper pressure plate is arranged above the lower pressure plate, and a plurality of springs are arranged between the lower pressure plate and the upper pressure plate. The ball check valve provided by the utility model can adjust the compression degree of the spring by rotating the screw, and then adjust the sealing pressure of the sealing ball, so that the ball check valve can be adjusted according to the medium and the use conditions, and has a simple structure and a wide range of uses.

[0004] As mentioned above, the patent provides a ball check valve. Although it can be adjusted accordingly, if the medium that passes through the inside of the check valve is water, it is inevitable that the surface of the connecting rod will be corroded and need to be replaced. The sealing ball is fixedly connected to the connecting rod and the lower pressure plate, and there is a fixing frame and sleeve in the middle. Disassembly is troublesome, and once the connecting rod is replaced, the lower pressure plate and the sealing ball also need to be replaced together, and the maintenance cost is high.

[0005] Therefore, a ball check valve is proposed to solve the above problems. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above problems, a ball check valve is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a ball check valve described in the utility model comprises a valve body; a check chamber is provided inside the valve body; a vertical rod is clamped inside the check chamber; a hollow check ball is slidably connected to the surface of the vertical rod; a floating plate is slidably connected to the surface of the vertical rod; a limit spring is sleeved on the top of the floating plate and located on the surface of the vertical rod; the bottom end of the limit spring is fixedly connected to the top of the floating plate; a sealing cover is clamped on the surface of the valve body; the top of the vertical rod passes through the sealing cover and extends to the top of the sealing cover; both sides of the valve body are connected with an inlet pipe and an outlet pipe; the surfaces of the inlet pipe and the outlet pipe are fixedly connected with connecting flanges; the top of the sealing cover is threadedly connected with a rotating spline; and the top of the sealing cover is provided with a connecting groove adapted to the rotating spline.

[0008] Preferably, one end of the water inlet pipe is fixedly connected to the surface of the valve body; the check cavity is located on one side of the water inlet pipe and is provided with a downward curved water guide cavity.

[0009] Preferably, one end of the water outlet pipe is fixedly connected to the surface of the valve body; the check cavity is located on one side of the water outlet pipe and is provided with an upward curved water guide cavity.

[0010] Preferably, the top end of the vertical rod is engaged with the bottom end of the rotating spline; and the surface of the vertical rod is slidably connected with the surface of the sealing cover.

[0011] Preferably, a connecting clamp ring is fixedly connected to the surface of the sealing cover; and a clamp ring placement groove adapted to the connecting clamp ring is provided on the surface of the valve body.

[0012] Preferably, a fixing bolt is slidably connected to the surface of the connecting clamp ring; one end of the fixing bolt passes through the connecting clamp ring and the valve body and extends to the interior of the valve body; and the surface of the fixing bolt is threadedly connected to the surface of the valve body.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a ball check valve, in which a hollow check ball is arranged in a check cavity and is limited by a vertical rod, and the vertical rod and the hollow check ball are non-fixedly connected. When the surface of the vertical rod is rusted and needs to be replaced, the rotating spline can be opened and the vertical rod can be taken out of the valve body for rapid replacement. At the same time, there is no need to disassemble other connected objects, thereby reducing maintenance costs and improving adaptability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 It is a three-dimensional diagram of some structures in the utility model;

[0018] Figure 3 It is the first stereogram of the utility model;

[0019] Figure 4 It is a three-dimensional diagram of the top structure of the sealing cover in the utility model;

[0020] Figure 5 It is a three-dimensional diagram of the interior of the valve body of the utility model;

[0021] Legend:

[0022] 1. Valve body; 2. Check chamber; 3. Vertical rod; 4. Hollow check ball; 5. Float plate; 6. Limit spring; 7. Sealing cover; 8. Water inlet pipe; 9. Water outlet pipe; 10. Connecting flange; 11. Lower curved water guide chamber; 12. Upper curved water guide chamber; 13. Rotating spline; 14. Connecting snap ring; 15. Snap ring placement groove; 16. Fixing bolt. DETAILED DESCRIPTION

[0023] 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.

[0024] Specific examples are given below.

[0025] See also Figure 1 - Figure 5When the valve body 1 is in operation, the cam 3 is pressed against the top of the valve body 1, and the cam 3 is pressed against the top of the valve body 1 to release the cam 3. When the valve body 1 is in operation, the cam 3 is pressed against the top of the valve body 1 to release the cam 3. When the water level rises, the floating plate 5 starts to float and the floating plate 5 starts to float, and begins to squeeze the limiting spring 6. When the water flow disappears instantly, the squeezed limiting spring 6 pushes the floating plate 5 in the opposite direction, so that the hollow check ball 4 returns to the bottom instantly. The refluxed water remains between the floating plate 5 and the surface of the hollow check ball 4, so that the hollow check ball 4 cannot continue to float, thereby preventing the liquid from flowing back. As the use time increases, some rust will appear on the surface of the vertical rod 3. At this time, it is only necessary to open the rotating spline 13, and the vertical rod 3 is slidably connected with the hollow check ball 4, so that the vertical rod 3 can be directly pulled out for replacement, and there is no need to replace the hollow check ball 4 and the vertical rod 3 as a whole, thereby reducing the maintenance cost.

[0026] Further, such as Figure 1 and Figure 5 As shown, one end of the water inlet pipe 8 is fixedly connected to the surface of the valve body 1; the check chamber 2 is located on one side of the water inlet pipe 8 and is provided with a lower curved water guide chamber 11; one end of the water outlet pipe 9 is fixedly connected to the surface of the valve body 1; the check chamber 2 is located on one side of the water outlet pipe 9 and is provided with an upper curved water guide chamber 12. When working, the water inlet pipe 8 and the water outlet pipe 9 are respectively arranged on both sides of the valve body 1, and the lower curved water guide chamber 11 is opened at the water inlet pipe 8 to achieve that the water flow first accumulates inside the lower curved water guide chamber 11, and when it reaches a certain height, the hollow check ball 4 is lifted, thereby achieving normal drainage work, and the upper curved water guide chamber 12 is opened at the water outlet pipe 9. If the water flows backward, it will first spread upward along the upper curved water guide chamber 12, and will not lift the hollow check ball 4. Instead, it will spread upward and will eventually slowly accumulate between the hollow check ball 4 and the surface of the floating plate 5, and the hollow check ball 4 will be stuck at the top of the lower curved water guide chamber 11, thereby achieving the function of non-return.

[0027] Further, such as Figure 1 , Figure 2 and Figure 5 As shown, the top of the vertical rod 3 is clamped with the bottom of the rotating spline 13; the surface of the vertical rod 3 is slidably connected with the surface of the sealing cover 7; the surface of the sealing cover 7 is fixedly connected with a connecting clamp ring 14; the surface of the valve body 1 is provided with a clamp ring placement groove 15 adapted to the connecting clamp ring 14; the surface of the connecting clamp ring 14 is slidably connected with a fixing bolt 16; one end of the fixing bolt 16 passes through the connecting clamp ring 14 and the valve body 1 and extends to the interior of the valve body 1; the surface of the fixing bolt 16 is threadedly connected with the surface of the valve body 1. During operation, the rotating spline 13 is fixed to the top of the vertical rod 3, and the surface of the vertical rod 3 located inside the sealing cover 7 is slidably connected to the sealing cover 7, so that the vertical rod 3 is fixed on the sealing cover 7. When it needs to be removed, it is only necessary to rotate the rotating spline 13, and the sealing cover 7 is provided with a detachable structure, and the inside of the check chamber 2 is sealed at the same time. The sealing cover 7 is fixed in the retaining ring placement groove 15 on the surface of the valve body 1 by the fixing bolt 16 and the connecting retaining ring 14, which is convenient for disassembly and assembly, so that the inside of the valve body 1 can be quickly inspected and maintained, further improving the adaptability of use.

[0028] Working principle: Since the above patent provides a ball check valve, although it can be adjusted accordingly, if the medium passing through the inside of the check valve is water, it is inevitable that the surface of the connecting rod will be rusted and needs to be replaced. The sealing ball is fixedly connected to the connecting rod and the lower pressure plate, and there is a fixing frame and a sleeve in the middle, which makes it troublesome to disassemble. Once the connecting rod is replaced, the lower pressure plate and the sealing ball need to be replaced together, which leads to a high maintenance cost. When working, the check chamber 2 is opened inside the valve body 1, and the vertical rod 3 is clamped inside the valve body 1. The hollow check ball 4 is limited by the vertical rod 3. The hollow check ball 4 has a certain buoyancy and a light weight. It can be floated at any time when there is water or gas, and the vertical rod 3 limits it. When there is liquid flowing through When water flows, the hollow check ball 4 begins to float, and the float plate 5 also begins to float up, and begins to squeeze the limit spring 6. When the water flow disappears instantly, the squeezed limit spring 6 pushes the float plate 5 in the opposite direction, causing the hollow check ball 4 to return to the bottom instantly, and the refluxed water remains between the float plate 5 and the surface of the hollow check ball 4, making the hollow check ball 4 unable to continue to float, thereby preventing the liquid from flowing back. As the use time increases, some rust will appear on the surface of the vertical rod 3. At this time, it is only necessary to open the rotating spline 13, and the vertical rod 3 is slidably connected with the hollow check ball 4, so that the vertical rod 3 can be directly pulled out for replacement, without the need to replace the hollow check ball 4 and the vertical rod 3 as a whole, thereby reducing the maintenance cost. The water inlet pipe 8 and the water outlet pipe 9 are respectively arranged on both sides of the valve body 1. A downward curved water guiding cavity 11 is provided at the water pipe 8 so that the water flow first accumulates inside the downward curved water guiding cavity 11. When it reaches a certain height, the hollow check ball 4 is lifted to realize normal drainage. An upward curved water guiding cavity 12 is provided at the water outlet pipe 9. If the water flows backward, it will first spread upward along the upward curved water guiding cavity 12 without lifting the hollow check ball 4. Instead, it will spread upward and eventually slowly accumulate between the hollow check ball 4 and the surface of the floating plate 5, and the hollow check ball 4 will be stuck at the top of the downward curved water guiding cavity 11, so as to realize the check function. The rotating spline 13 is fixed to the top of the vertical rod 3. The surface of the vertical rod 3 located inside the sealing cover 7 is threadedly connected to the sealing cover 7, so that the vertical rod 3 is fixed on the sealing cover 7. When it needs to be removed, only It is sufficient to rotate the rotating spline 13, and the sealing cover 7 is provided with a detachable structure, and the inside of the check chamber 2 is sealed at the same time. The sealing cover 7 is fixed in the clamping ring placement groove 15 on the surface of the valve body 1 by means of the fixing bolts 16 and the connecting clamping ring 14, which is convenient for disassembly and assembly, so that the inside of the valve body 1 can be quickly inspected and maintained, and the adaptability of use is further improved. By arranging the hollow check ball 4 in the check chamber 2 and limiting it by the vertical rod 3, and the vertical rod 3 and the hollow check ball 4 are non-fixedly connected, when the surface of the vertical rod 3 is rusted and needs to be replaced, the rotating spline 13 can be opened, and the vertical rod 3 can be taken out of the valve body 1 for quick replacement. At the same time, there is no need to disassemble other connected objects, which reduces the maintenance cost and improves the adaptability of use.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A ball check valve, characterized in that: The invention comprises a valve body (1); a check chamber (2) is provided inside the valve body (1); a vertical rod (3) is clamped inside the check chamber (2); a hollow check ball (4) is slidably connected to the surface of the vertical rod (3); a floating plate (5) is slidably connected to the surface of the vertical rod (3); a limit spring (6) is sleeved on the top of the floating plate (5) and located on the surface of the vertical rod (3); the bottom end of the limit spring (6) is fixedly connected to the top of the floating plate (5); the surface of the valve body (1) is connected to ... The surface is clamped with a sealing cover (7); the top end of the vertical rod (3) penetrates the sealing cover (7) and extends to the top of the sealing cover (7); both sides of the valve body (1) are connected with a water inlet pipe (8) and a water outlet pipe (9); the surfaces of the water inlet pipe (8) and the water outlet pipe (9) are fixedly connected with a connecting flange (10); the top of the sealing cover (7) is threadedly connected with a rotating spline (13); and the top of the sealing cover (7) is provided with a connecting slot adapted to the rotating spline (13).

2. A ball check valve according to claim 1, characterized in that: One end of the water inlet pipe (8) is fixedly connected to the surface of the valve body (1); the check chamber (2) is located on one side of the water inlet pipe (8) and is provided with a downward curved water guide chamber (11).

3. A ball check valve according to claim 1, characterized in that: One end of the water outlet pipe (9) is fixedly connected to the surface of the valve body (1); the check chamber (2) is located on one side of the water outlet pipe (9) and is provided with an upper curved water guide chamber (12).

4. A ball check valve according to claim 1, characterized in that: The top end of the vertical rod (3) is clamped with the bottom end of the rotating spline (13); the surface of the vertical rod (3) is slidably connected with the surface of the sealing cover (7).

5. A ball check valve according to claim 4, characterized in that: A connecting snap ring (14) is fixedly connected to the surface of the sealing cover (7); and a snap ring placement groove (15) adapted to the connecting snap ring (14) is provided on the surface of the valve body (1).

6. A ball check valve according to claim 5, characterized in that: The surface of the connecting clamp ring (14) is slidably connected to a fixing bolt (16); one end of the fixing bolt (16) passes through the connecting clamp ring (14) and the valve body (1) and extends to the interior of the valve body (1); the surface of the fixing bolt (16) is threadedly connected to the surface of the valve body (1).

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