Clamping and pressing ball valve

Abstract

A mounting opening is formed in the upper end of a valve body, and a valve cover is connected with the mounting opening; a flexible sealing ring is arranged on the outer side end surface of the polytetrafluoroethylene sealing ring; a clamping groove is formed in the top of the ball core; a limiting block is arranged at the bottom of the valve rod, and a clamping block matched with the clamping groove is arranged at the bottom end of the limiting block; a through hole for the valve rod to penetrate through is formed in the center of the valve cover; the junction position of the water inlet and the rotating cavity and the junction position of the water outlet and the rotating cavity are each provided with one teflon sealing ring, and the ball core is installed in the rotating cavity. The top end of the valve rod penetrates through a through hole formed in the center of the valve deck from bottom to top, a clamping block at the bottom end of the valve rod is clamped in a clamping groove in the top of the ball core, the upper portion, extending out of the valve deck, of the valve rod is connected with a handle in a clamped mode, and a nut is arranged on the valve rod above the handle. When the polytetrafluoroethylene sealing ring is replaced, the ball valve does not need to be taken down from the pipeline, the pipeline does not need to be cut and the like, the maintenance workload is greatly reduced, the maintenance time is shortened, and the maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to a compression ball valve, belonging to the technical field of valves. Background Art

[0002] ‌A ball valve is a common valve. The ball core of the ball valve is driven by the valve stem and rotates around the axis of the ball valve. Since the opening and closing of the ball valve is achieved by the rotation of the ball core, the component that is in close contact with the ball core and acts as a seal is the PTFE sealing ring. During the use of the ball valve, the ball core constantly reciprocates and rubs against the PTFE sealing ring. Over time, the PTFE sealing ring will inevitably be damaged to varying degrees, eventually resulting in a decrease in the sealing effect and leakage. Once a leak occurs, the PTFE sealing ring needs to be replaced. The current structure of the ball valve is assembled on both sides horizontally. After the ball valve is installed on the pipeline, if you want to replace the PTFE sealing ring inside it, you must cut the pipeline and remove the ball valve from the pipeline to open the ball valve to replace the PTFE sealing ring inside it. After the repair, you need to reconnect the pipeline and the ball valve. The current structure of the ball valve is undoubtedly very troublesome to repair. Disassembling the pipeline also greatly increases the workload and time of maintenance, and also increases the maintenance cost. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a compression ball valve. When replacing the PTFE sealing ring, the operation is directly performed on the ball valve without cutting the pipeline, etc., thereby reducing the maintenance workload, shortening the maintenance time and saving the maintenance cost.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a compression ball valve, comprising a valve body, a ball core, a valve stem, a polytetrafluoroethylene sealing ring and a handle, and also comprising a valve cover, the two sides of the valve body are respectively provided with a water inlet and a water outlet, the upper end of the valve body is provided with a mounting port, and the valve cover is connected to the mounting port; a rotating chamber for mounting the ball core is provided inside the valve body;

[0005] A flexible sealing ring is provided on the outer end face of the PTFE sealing ring; a groove is provided on the top of the ball core; a limit block is provided at the bottom of the valve stem, and a block matching the groove is provided at the bottom end of the limit block; a through hole is provided at the center of the valve cover for the valve stem to pass through;

[0006] A polytetrafluoroethylene sealing ring is installed at the junction of the water inlet and the rotating chamber and at the junction of the water outlet and the rotating chamber respectively. The side of the polytetrafluoroethylene sealing ring provided with a flexible sealing ring faces the water inlet or the water outlet. The ball core is installed in the rotating chamber, and the polytetrafluoroethylene sealing ring is in sealing contact with the ball core.

[0007] The top of the valve stem passes through the through hole opened in the center of the valve cover from bottom to top, the clamping block at the bottom of the valve stem is embedded in the clamping groove at the top of the ball core, the valve stem extends to the upper part outside the valve cover and is clamped with a handle, and a nut is provided on the valve stem above the handle.

[0008] Furthermore, a groove is provided on the outer end surface of the polytetrafluoroethylene sealing ring, and the flexible sealing ring is arranged in the groove.

[0009] Furthermore, the flexible sealing ring is made of rubber.

[0010] Furthermore, the valve cover is connected to the mounting port by bolts and a sealing coil is provided at the connection.

[0011] Furthermore, a sewage outlet is provided at the bottom of the valve body, and the sewage outlet is sealed by a screw cover.

[0012] Furthermore, a threaded hole is provided on the bottom surface of the slot.

[0013] Furthermore, it also includes a sealing ring and a pressure cover, and the outer wall of the valve stem and the valve cover through hole at the corresponding position is provided with a sealing ring.

[0014] Furthermore, it also includes a gland, which is sleeved outside the valve stem and threadedly connected to the valve cover through hole, and the bottom end of the gland is against the top end of the sealing ring.

[0015] Compared with the prior art, the overall assembly of the utility model is operated by the installation port on the top of the valve body. Therefore, if the PTFE sealing ring is damaged and causes water leakage and needs to be replaced, there is no need to remove the ball valve from the pipeline, and there is no need to cut the pipeline, etc., which greatly reduces the maintenance workload, shortens the maintenance time and saves maintenance costs, and has great promotion value and significance. A flexible sealing ring is provided on the outer end face of the PTFE sealing ring. The flexible sealing ring has a certain elasticity, so it can ensure that the ball core can be smoothly pressed down into the rotating chamber without damaging the PTFE sealing ring. At the same time, it can also make the ball core always give the PTFE sealing ring a force toward the ball core when rotating, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the valve body structure of the utility model;

[0018] Figure 3 This is the front view of the polytetrafluoroethylene sealing ring of the utility model;

[0019] Figure 4 This is a side view of the polytetrafluoroethylene sealing ring of the utility model;

[0020] Figure 5 This is a schematic diagram of the core structure of the utility model;

[0021] Figure 6 This is a schematic diagram of the valve stem structure of the utility model;

[0022] In the figure: 1. valve body, 11. installation port, 12. water inlet, 13. water outlet, 14. rotating chamber; 2. PTFE sealing ring, 21. groove, 22. flexible sealing ring; 3. ball core, 31. slot, 32. threaded hole; 4. valve cover, 5. valve stem, 51. block, 52. limit block, 6. sealing ring, 7. pressure cover, 8. handle, 9. nut. DETAILED DESCRIPTION

[0023] The utility model will be further described below in conjunction with the accompanying drawings.

[0024] 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 in 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.

[0025] like Figures 1 to 4 As shown, the utility model provides a technical solution: including a valve body 1, a ball core 3, a valve cover 4, a valve stem 5, a polytetrafluoroethylene sealing ring 2 and a handle 8, as shown in FIG. Figure 2 As shown, a water inlet 12 and a water outlet 13 are respectively provided at both side ends of the valve body 1, a mounting port 11 is provided at the upper end of the valve body 1, the valve cover 4 is connected to the mounting port 11 by bolts and a sealing coil is provided at the connection; a rotating chamber 14 for installing the ball core 3 is provided inside the valve body 1.

[0026] like Figure 3 and Figure 4 As shown, the outer end surface of the polytetrafluoroethylene sealing ring 2 is provided with a flexible sealing ring 22. In order to improve the fixing effect of the flexible sealing ring 22, the outer end surface of the polytetrafluoroethylene sealing ring 2 is provided with a groove 21 or an L groove, and the flexible sealing ring 22 is arranged in the groove 21. The flexible sealing ring 22 is preferably made of rubber; Figure 5 As shown, a slot 31 is provided on the top of the core 3; Figure 6 As shown, a limit block 52 is provided at the bottom of the valve stem 5, and a clamping block 51 adapted to the clamping groove 31 is provided at the bottom end of the limit block 52; a through hole for the valve stem 5 to pass through is provided at the center of the valve cover 4.

[0027] A polytetrafluoroethylene sealing ring 2 is installed at the junction of the water inlet 12 and the rotating chamber 14 and at the junction of the water outlet 13 and the rotating chamber 14 respectively. The polytetrafluoroethylene sealing ring 2 is provided with a flexible sealing ring 22 whose side faces the water inlet 12 or the water outlet 13. The ball core 3 is installed in the rotating chamber 14, and the polytetrafluoroethylene sealing ring 2 is in sealing contact with the ball core 3. The flexible sealing ring 22 is in contact with the inner end face of the water inlet 12 or the water outlet 13. The elasticity of the flexible sealing ring 22 is better than that of the polytetrafluoroethylene sealing ring 2. Therefore, the flexible sealing ring 22 will give the polytetrafluoroethylene sealing ring 2 a force toward the ball core 3, so that the polytetrafluoroethylene sealing ring 2 and the ball core 3 are better sealed.

[0028] The top end of the valve stem 5 passes through the through hole opened in the center of the valve cover 4 from bottom to top, and the block 51 at the bottom end of the valve stem 5 is embedded in the groove 31 at the top of the ball core 3. The valve stem 5 extends to the upper part outside the valve cover 4 and is clamped with a handle 8. A nut is provided on the valve stem 5 above the handle 8.

[0029] When assembling the utility model, first install the two polytetrafluoroethylene sealing rings 2 at the junction of the water inlet 12 and the rotating chamber 14 and the junction of the water outlet 13 and the rotating chamber 14 from the installation port 11, and then press the ball core 3 from the installation port 11 into the rotating chamber 14. Since the flexible sealing ring 22 has a certain elasticity, it can ensure that the ball core 3 can be smoothly pressed into the rotating chamber 14 without damaging the polytetrafluoroethylene sealing ring 2. At the same time, it can also make the ball core 3 always give the polytetrafluoroethylene sealing ring 2 a force toward the ball core 3 when rotating, thereby improving the sealing effect; then the top end of the valve stem 5 passes through the through hole opened at the center of the valve cover 4 from bottom to top until the limit block 52 abuts against the lower surface of the valve cover 4, and then the handle 8 is clamped in turn to install the nut 9, and the handle 8 is fixed to the valve stem 5 through the nut 9, and finally the clamping block 51 at the bottom end of the valve stem 5 is aligned with the clamping groove 31 at the top of the ball core 3, and the entire valve cover 4 is covered at the installation port 11 of the valve body 1 and connected by bolts, so that the entire ball valve is assembled. At this time, the clamping block 51 is embedded in the clamping groove 31, and the rotating handle 8 can drive the valve stem 5 to rotate. Since the clamping block 51 is embedded in the clamping groove 31, the rotation of the valve stem 5 will drive the ball core 3 to rotate, thereby achieving the purpose of opening and closing the ball valve.

[0030] In order to further improve the sealing effect, a sealing ring 6 and a pressure cover 7 are additionally provided. A sealing ring 6 is provided on the outer wall of the valve stem 5 at the corresponding position of the through hole of the valve cover 4. The pressure cover 7 is sleeved on the outside of the valve stem 5 and is threadedly connected to the through hole of the valve cover 4. The bottom end of the pressure cover 7 is against the top end of the sealing ring 6.

[0031] During use, if the PTFE sealing ring 2 is damaged and causes water leakage, the bolts connecting the valve cover 4 and the mounting port 11 are directly removed, the valve cover 4 is opened to directly take out the ball core 3 from the rotating chamber 14, and then the damaged PTFE sealing ring 2 can be replaced with a new PTFE sealing ring 2. After replacement, the ball valve can be reassembled. In order to facilitate the removal of the ball core 3 from the rotating chamber 14, a threaded hole 32 is opened on the bottom surface of the slot 31. When the ball core 3 needs to be removed, a pull ring with a threaded structure at one end is screwed into the threaded hole 32, and the ball core 3 is pulled out of the rotating chamber 14 by pulling the pull ring; since the overall assembly of the ball valve is operated by the mounting port 11 above the valve body 1, there is no need to remove the ball valve from the pipeline, and there is no need to cut the pipeline, etc., which greatly reduces the workload of maintenance, shortens the maintenance time and saves maintenance costs, and has great promotion value and significance.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A compression ball valve, comprising a valve body (1), a ball core (3), a valve stem (5), a polytetrafluoroethylene sealing ring (2) and a handle (8), characterized in that: It also comprises a valve cover (4), a water inlet (12) and a water outlet (13) are respectively provided at two side ends of the valve body (1), a mounting opening (11) is provided at the upper end of the valve body (1), and the valve cover (4) is connected to the mounting opening (11); a rotating chamber (14) is provided inside the valve body (1) for mounting the ball core (3); A flexible sealing ring (22) is provided on the outer end surface of the polytetrafluoroethylene sealing ring (2); a clamping groove (31) is provided on the top of the ball core (3); a limit block (52) is provided at the bottom of the valve stem (5), and a clamping block (51) adapted to the clamping groove (31) is provided at the bottom end of the limit block (52); and a through hole for the valve stem (5) to pass through is provided at the center of the valve cover (4); A polytetrafluoroethylene sealing ring (2) is installed at the junction of the water inlet (12) and the rotating chamber (14) and at the junction of the water outlet (13) and the rotating chamber (14), respectively. The side of the polytetrafluoroethylene sealing ring (2) provided with a flexible sealing ring (22) faces the water inlet (12) or the water outlet (13). The ball core (3) is installed in the rotating chamber (14), and the polytetrafluoroethylene sealing ring (2) is in sealing contact with the ball core (3). The top end of the valve stem (5) passes through a through hole provided at the center of the valve cover (4) from bottom to top, and a clamping block (51) at the bottom end of the valve stem (5) is clamped in a clamping groove (31) at the top of the ball core (3). The valve stem (5) extends to the upper part outside the valve cover (4) and is clamped with a handle (8). A nut is provided on the valve stem (5) above the handle (8).

2. A compression ball valve according to claim 1, characterized in that: The outer end surface of the polytetrafluoroethylene sealing ring (2) is provided with a groove (21), and the flexible sealing ring (22) is arranged in the groove (21).

3. A compression ball valve according to claim 2, characterized in that: The flexible sealing ring (22) is made of rubber.

4. The compression ball valve according to claim 1, characterized in that: The valve cover (4) is connected to the mounting opening (11) via bolts, and a sealing coil is provided at the connection.

5. The compression ball valve according to claim 1, characterized in that: The bottom of the valve body (1) is provided with a sewage outlet, which is sealed by a screw cover.

6. The compression ball valve according to claim 1, characterized in that: A threaded hole (32) is provided on the bottom surface of the clamping slot (31).

7. The compression ball valve according to claim 1, characterized in that: It also includes a sealing ring (6) and a pressure cover (7), and the sealing ring (6) is provided on the outer wall of the valve stem (5) and the valve cover (4) at positions corresponding to the through holes.

8. The compression ball valve according to claim 7, characterized in that: It also includes a gland (7), which is sleeved outside the valve stem (5) and is threadedly connected to the through hole of the valve cover (4), and the bottom end of the gland (7) abuts against the top end of the sealing ring (6).

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