Anti-falling V-shaped ball valve

Abstract

A first spline hole is formed in the upper end of a valve element, a first spline shaft part is arranged at the lower end of an upper valve rod and connected with the first spline hole, a step limiting hole part is arranged at the lower end opening of the first spline hole, and an anti-flying limiting gasket is arranged in the step limiting hole part. A threaded connecting hole is further formed in the lower end face of the first spline shaft part, the axis of the threaded connecting hole is vertically arranged, the threaded connecting hole is provided with a locking screw, the locking screw penetrates through the connecting through hole to fixedly connect the anti-flying limiting gasket to the lower end of the upper valve rod, a second spline hole is formed in the lower end of the valve element, and a second spline shaft part is arranged at the upper end of the lower valve rod. The locking screw is matched to connect the anti-flying limiting gasket, the valve element and the upper valve rod to form an anti-falling (anti-flying) structure, disassembly and assembly are convenient, matching of the valve element, the valve seat and the pre-tightening spring cannot be affected, the situation that the pre-tightening force of the pre-tightening spring is affected due to assembling of the valve element and the upper valve rod is avoided, and stable operation of the valve element is supported through matching of the lower valve rod.

Description

Technical Field

[0001] The utility model relates to a V-type ball valve. Background Art

[0002] The V-type ball valve is a common regulating valve. Its valve core has a V-port. In addition, the valve seat on its valve body is equipped with a spring. The spring provides a pre-tightening force so that the valve seat can maintain cooperation with the valve core (that is, the ball core with a V-port). The valve stem is fixedly connected to the valve core to prevent the valve stem and the valve core from detaching and flying out. For example, a cylindrical pin can be used between the valve stem and the valve core as an anti-detachment structure (i.e., an anti-flying structure to prevent the valve stem and the valve core from detaching and flying out). During the use of this structure, if the valve core is damaged, the valve core cannot be replaced on site. The valve needs to be removed and returned to the factory for repair, and the cylindrical pin needs to be taken out with professional tools to remove and replace the valve core. Moreover, when the cylindrical pin is fixed, it is necessary to pre-install the valve seat, spring, etc. (relative position is accurate) and then drill a pin hole (for cylindrical pin assembly) between the valve stem and the valve core to ensure the accurate relative position between the valve stem and the valve core and the accurate relative position of the pre-installed valve seat, spring, etc., which is relatively troublesome. In addition, during the process of drilling the pin hole, the drilling pressure causes the spring to deform, which is easy to affect the spring, reduce the preload force of the spring on the valve seat, and easily cause valve seal leakage. Utility Model Content

[0003] In view of the technical problems existing in the background technology, the technical problem solved by the utility model is to provide a V-type ball valve with an anti-slip structure and convenient disassembly and assembly without affecting the spring to avoid leakage.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an anti-drop V-type ball valve, comprising a valve body, a valve core, a valve seat, an upper valve stem and a lower valve stem, the valve core is located in the valve body, the valve seat is arranged in the valve body, the valve seat is also provided with a preload spring to keep the valve seat and the valve core in cooperation, the upper valve stem and the lower valve stem are connected and arranged on the valve body, a first assembly through hole and a second assembly through hole are provided on the valve body, the first assembly through hole and the second assembly through hole are arranged correspondingly up and down, the upper valve stem is connected to the first assembly through hole, and the lower valve stem is connected to the second assembly through hole, and is characterized in that: the upper end of the valve core is provided with a first spline hole, the lower end of the upper valve stem is provided with a first spline hole, and the lower end of the upper valve stem is provided with a first spline hole. The end is set as a first spline shaft portion, the first spline shaft portion is connected and arranged in the first spline hole, the lower end port of the first spline hole is set as a step limit hole portion, and an anti-fly limit washer is arranged in the step limit hole portion, and the lower end face of the first spline shaft portion is also provided with a threaded connection hole, the axis of the threaded connection hole is vertically arranged, and the threaded connection hole is equipped with a locking screw, the middle of the anti-fly limit washer is a connecting through hole, and the locking screw passes through the connecting through hole to connect and fix the anti-fly limit washer to the lower end of the upper valve stem, and a second spline hole is provided at the lower end of the valve core, and the upper end of the lower valve stem is set as a second spline shaft portion, and the second spline shaft portion is connected and arranged in the second spline hole.

[0005] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0006] The upper end of the upper valve stem extends from the valve body and is transmission-connected with the actuator.

[0007] In addition, a first shaft sleeve is arranged in the first assembly through hole, and the first shaft sleeve is sleeved outside the upper valve stem. A second shaft sleeve is arranged in the second assembly through hole, and the second shaft sleeve is sleeved outside the lower valve stem.

[0008] It can also be optimized that a limiting convex ring is further provided on the lower valve stem, the second assembly through hole has a limiting step, the limiting convex ring is located below the limiting step, and the lower end of the second assembly through hole is provided with a bottom cover.

[0009] Wherein, sealing rings may be provided on the upper and lower sides of the limiting convex ring respectively.

[0010] In an additional optimization, the lower port of the second spline hole is set as a positioning tapered hole portion, and a positioning outer tapered portion is provided on the lower valve stem. The positioning outer tapered portion is located below the second spline shaft portion, and the positioning outer tapered portion matches the positioning tapered hole portion.

[0011] Wherein, under the action of the preload spring, the valve seat and the spherical surface of the valve core maintain sealing contact and cooperation.

[0012] The beneficial effect of the utility model is that, in the anti-dropout V-type ball valve, the locking screw passes through the connecting through hole to connect and fix the anti-fly limit washer to the lower end of the upper valve stem, and the anti-fly limit washer is located in the step limit hole portion to limit and prevent dropout, and the locking screw is used to connect the anti-fly limit washer, the valve core, and the upper valve stem. The locking screw and the anti-fly limit washer are located at the lower end of the upper valve stem to form an anti-dropout (anti-flying) structure, which is not only convenient for disassembly and assembly, but also will not affect the cooperation between the valve core and the valve seat and the pre-tightening spring, and avoids the pre-tightening force of the pre-tightening spring being affected by the assembly of the valve core and the upper valve stem (avoiding affecting the valve sealing). In addition, the lower valve stem cooperates to support the valve core for stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following describes the relevant details and working principles of the implementation methods and embodiments of the present utility model in conjunction with the accompanying drawings.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 The present invention is a schematic diagram of the structure of a V-type ball valve in the background technology, in which a valve stem and a valve core are fixedly connected by a cylindrical pin.

[0016] In the figure: 1. valve body; 2. valve core; 3. valve seat; 4. upper valve stem; 5. lower valve stem; 6. preload spring; 7. first assembly through hole; 8. second assembly through hole; 9. first spline hole; 10. first spline shaft; 11. step limit hole; 12. anti-fly limit washer; 13. threaded connection hole; 14. locking screw; 15. connecting through hole; 16. second spline hole; 17. second spline shaft; 18. first bushing; 19. second bushing; 20. limit convex ring; 21. limit step; 22. bottom cover; 23. sealing ring; 26. cylindrical pin. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the implementation of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without making creative work based on the embodiments of the utility model are within the scope of protection of the utility model.

[0018] Referring to the accompanying drawings, an anti-dropout V-type ball valve in an embodiment of the present embodiment includes a valve body 1, a valve core 2, a valve seat 3, an upper valve stem 4 and a lower valve stem 5, the valve core 2 is located in the valve body 1, the valve seat 3 is arranged in the valve body 1, and the valve seat 3 is also provided with a preload spring 6, which keeps the valve seat 3 and the valve core 2 in cooperation, wherein the upper valve stem 4 and the lower valve stem 5 are connected and arranged on the valve body 1 so that the upper valve stem 4 and the lower valve stem 5 can run on the valve body 1, and a first assembly through hole 7 and a second assembly through hole 8 are provided on the valve body 1, and the first assembly through hole 7 and the second assembly through hole 8 are arranged correspondingly up and down so that the upper valve stem 4 and the lower valve stem 5 can ensure coaxiality, the upper valve stem 4 is connected to the first assembly through hole 7, and the lower valve stem 5 is connected to the second assembly through hole 8.

[0019] Among them, the upper end of the valve core 2 is provided with a first spline hole 9, and the lower end of the upper valve stem 4 is set as a first spline shaft portion 10. The first spline shaft portion 10 is connected and configured in the first spline hole 9. The first spline shaft portion 10 can be inserted into the first spline hole 9 for connection and realize transmission cooperation, so that the upper valve stem 4 drives the valve core 2 to rotate and operate; and the lower end of the first spline hole 9 is set as a step limit hole portion 11, and an anti-fly limit washer 12 is arranged in the step limit hole portion 11. The lower end face of the first spline shaft portion 10 is also provided with a threaded connection hole 13, and the axis of the threaded connection hole 13 is vertically arranged. The threaded connection hole 13 is equipped with a locking screw 14, and the locking screw 14 can be rotated The rotary connection is locked and fixed on the threaded connection hole 13, and the middle of the anti-fly limit washer 12 is a connecting through hole 15. The locking screw 14 passes through the connecting through hole 15 to connect and fix the anti-fly limit washer 12 to the lower end of the upper valve stem 4; the locking screw 14 is used to connect the anti-fly limit washer 12, the valve core 2, and the upper valve stem 4. The locking screw 14 and the anti-fly limit washer 12 are located at the lower end of the upper valve stem 4, and cooperate to form an anti-slip (anti-fly) structure, which is not only convenient for disassembly and assembly, but also will not affect the cooperation between the valve core 2 and the valve seat 3 and the preload spring 6, thereby avoiding the preload force of the preload spring 6 affected by the assembly of the valve core 2 and the upper valve stem 4 (avoiding affecting the valve sealing).

[0020] Among them, the lower end of the valve core 2 is provided with a second spline hole 16, and the upper end of the lower valve stem 5 is set as a second spline shaft portion 17. The second spline shaft portion 17 is connected and configured in the second spline hole 16. The second spline shaft portion 17 of the lower valve stem 5 can be inserted into the second spline hole 16 for connection and transmission. The lower valve stem 5 cooperates to support the valve core 2 to rotate and operate, and the operation is more stable.

[0021] In the anti-dropout V-type ball valve, the locking screw 14 passes through the connecting through hole 15 to connect and fix the anti-flying limit washer 12 to the lower end of the upper valve stem 4, and the anti-flying limit washer 12 is located in the step limiting hole 11 to limit and prevent dropout. The locking screw 14 is used to connect the anti-flying limit washer 12, the valve core 2, and the upper valve stem 4. The locking screw 14 and the anti-flying limit washer 12 are located at the lower end of the upper valve stem 4 to form an anti-dropout (anti-flying) structure. It is not only convenient to disassemble and assemble, but also will not affect the cooperation between the valve core 2 and the valve seat 3 and the preload spring 6, so as to avoid affecting the preload force of the preload spring 6 due to the assembly of the valve core 2 and the upper valve stem 4 (avoiding affecting the valve sealing). In addition, the lower valve stem 5 cooperates to support the valve core 2 for stable operation.

[0022] The following optimization or further explanation may be performed based on the above embodiments.

[0023] Under the action of the preload spring 6, the valve seat 3 maintains a sealed contact with the spherical surface of the valve core 2, wherein the assembly structure of the valve core 2, the upper valve stem 4, and the lower valve stem 5 will not affect the preload spring 6, and the matching relationship between the valve seat 3 and the valve core 2 will not be affected. For example, the locking screw 14 can be a hexagon socket screw; the connecting through hole 15 of the anti-flying limit washer 12 can have a conical countersunk hole that can match the conical head of the locking screw 14, and the locking effect is better and more secure.

[0024] For example, the upper end of the upper valve stem 4 extends from the valve body 1 and is connected to the actuator, and the actuator drives the upper valve stem 4 to rotate. A first sleeve 18 is provided in the first assembly through hole 7, and the first sleeve 18 is sleeved outside the upper valve stem 4. The first sleeve 18 cooperates to support the upper valve stem 4 to stably rotate and operate in the first assembly through hole 7 of the valve body 1. A second sleeve 19 is provided in the second assembly through hole 8, and the second sleeve 19 is sleeved outside the lower valve stem 5. The second sleeve 19 cooperates to support the lower valve stem 5 to stably rotate and operate in the second assembly through hole 8 of the valve body 1. Corresponding step holes can be set in the first assembly through hole 7 and the second assembly through hole 8 for convenient and stable assembly of the corresponding sleeves. Among them, a limiting convex ring 20 can also be provided on the lower valve stem 5, and the second assembly through hole 8 has a limiting step 21. The limiting convex ring 20 is located below the limiting step 21, so that the axial position of the assembled lower valve stem 5 does not change, and the valve core 2 can be stably supported. In addition, the lower end of the second assembly through hole 8 is provided with a bottom cover 22, which can be connected and installed on the valve body 1 (located at the lower end of the second assembly through hole 8) by fasteners 27 (such as bolts), and the bottom cover 22 can be disassembled during disassembly to facilitate the disassembly of the lower valve stem 5 and the valve core 2. Among them, sealing rings 23 are respectively provided on the upper and lower sides of the limiting convex ring 20 to increase the anti-leakage capability.

[0025] In addition, additional optimization can be performed, which is not shown in the figure. The lower end of the second spline hole 16 is set as a positioning tapered hole part, and a positioning outer cone part is provided on the lower valve stem 5. The positioning outer cone part is located below the second spline shaft part 17, and the positioning outer cone part matches the positioning tapered hole part. When the second spline shaft part 17 of the lower valve stem 5 is inserted into the second spline hole 16, the positioning outer cone part and the positioning tapered hole part can also be coordinated to be positioned in the center to ensure coaxiality, so that the relative position of the valve core 2 is more accurate, less prone to deviation, and will not affect other structures, which is convenient for subsequent assembly and connection of screws. Of course, a positioning step 28 can also be set on the lower valve stem 5, so that when the second spline hole 16 of the valve core 2 is sleeved on the upper end of the lower valve stem 5, the positioning step cooperates with the setting limit, so that the axial relative position of the valve core 2 and the lower valve stem 5 is more stable, and the assembly is more convenient and quick.

Claims

1. An anti-drop V-shaped ball valve, comprising a valve body (1), a valve core (2), a valve seat (3), an upper valve stem (4) and a lower valve stem (5), wherein the valve core (2) is located in the valve body (1), the valve seat (3) is arranged in the valve body (1), and the valve seat (3) is also provided with a preload spring (6) for keeping the valve seat (3) and the valve core (2) in engagement. The upper valve stem (4) and the lower valve stem (5) are connected and arranged on the valve body (1); the valve body (1) is provided with a first assembly through hole (7) and a second assembly through hole (8); the first assembly through hole (7) and the second assembly through hole (8) are arranged correspondingly up and down; the upper valve stem (4) is connected to the first assembly through hole (7) and the lower valve stem (5) is connected to the second assembly through hole (8); the characteristics are: The upper end of the valve core (2) is provided with a first spline hole (9), the lower end of the upper valve stem (4) is provided with a first spline shaft portion (10), the first spline shaft portion (10) is connected and arranged in the first spline hole (9), the lower end of the first spline hole (9) is provided with a step limit hole portion (11), an anti-fly limit washer (12) is arranged in the step limit hole portion (11), the lower end surface of the first spline shaft portion (10) is further provided with a threaded connection hole (13), the axis of the threaded connection hole (13) is vertically arranged, the threaded connection hole (13) is provided with a locking screw (14), the middle of the anti-fly limit washer (12) is a connecting through hole (15), the locking screw (14) passes through the connecting through hole (15) to connect and fix the anti-fly limit washer (12) to the lower end of the upper valve stem (4), The lower end of the valve core (2) is provided with a second spline hole (16), the upper end of the lower valve stem (5) is provided with a second spline shaft portion (17), and the second spline shaft portion (17) is connected and arranged in the second spline hole (16).

2. The anti-drop V-shaped ball valve according to claim 1, characterized in that: The upper end of the upper valve stem (4) extends from the valve body (1) and is transmission-connected to the actuator. A first shaft sleeve (18) is provided in the first assembly through hole (7), and the first shaft sleeve (18) is sleeved on the outside of the upper valve stem (4). A second shaft sleeve (19) is provided in the second assembly through hole (8), and the second shaft sleeve (19) is sleeved outside the lower valve stem (5). The lower valve stem (5) is further provided with a limiting convex ring (20), the second assembly through hole (8) has a limiting step (21), and the limiting convex ring (20) is located below the limiting step (21). The lower end of the second assembly through hole (8) is provided with a bottom cover (22).

3. The anti-drop V-shaped ball valve according to claim 2, characterized in that: Sealing rings (23) are also provided on the upper and lower sides of the limiting convex ring (20), respectively.

4. The anti-drop V-shaped ball valve according to claim 1, characterized in that: The lower end of the second spline hole (16) is set as a positioning tapered hole portion, and the lower valve stem (5) is provided with a positioning outer tapered surface portion, which is located below the second spline shaft portion (17), and the positioning outer tapered surface portion matches the positioning tapered hole portion.

5. The anti-drop V-shaped ball valve according to claim 1, characterized in that: Under the action of the preload spring (6), the valve seat (3) and the spherical surface of the valve core (2) maintain a sealing contact fit.

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