Long-acting sealed floating ball valve

Abstract

The utility model relates to the technical field of floating type ball valves, in particular to a long-acting sealing floating type ball valve which comprises a valve body, a valve cover is fixed at the top end of the valve body, a valve rod is inserted in the middle of the valve cover, the bottom end of the valve rod is fixedly inserted into a ball body, and the outer side wall of the ball body and the valve body are in contact with a valve seat through a supporting ring and a fireproof ring. The valve seat is fixed to the inner side wall of a valve cavity of the valve body, the supporting ring is arranged on the outer side wall of the valve seat, the inner side of the valve seat is connected with the fireproof ring in a sleeving mode, a positioning block is fixed to the top end of the ball body, a cut-in groove is formed in the middle of the positioning block, and the valve rod and the ball body are fixedly clamped through a protruding head structure and a clamping groove. Therefore, power transmission and quick disassembly and assembly can be achieved, meanwhile, the ball body can be prevented from pressing the lower portion of the annular valve seat due to the gravity of the ball body, the sealing face of the annular valve seat is prevented from deforming or losing efficacy, and the long-term stable and effective sealing effect of the annular valve seat is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of floating ball valve technology, specifically to a long-lasting, sealing floating ball valve. Background Technology

[0002] A ball valve uses a ball with a circular through-hole as its opening and closing element. Driven by the valve stem, the ball rotates around the center of the valve stem from 0 to 90 degrees to complete the opening and closing function. Based on the different ways the ball is installed, ball valves can be divided into fixed ball valves and floating ball valves. The main difference is that in a fixed ball valve, the ball is fixedly installed on the valve stem, while in a floating ball valve, the ball can float slightly within the valve cavity.

[0003] Existing floating ball valves typically use annular seats on both sides of the ball to support its movement. Normally, under gravity, the ball will sink and press against the lower part of the annular seat. Over time, this can cause deformation of the sealing surface at the bottom of the annular seat, leading to the ball shifting downwards and ultimately causing the sealing surface at the top of the annular seat to fail. Utility Model Content

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a long-lasting sealing floating ball valve, which can effectively solve the problems in the existing technology.

[0006] Technical solution

[0007] This utility model provides a long-lasting sealing floating ball valve, including a valve body, a valve cover fixed to the top of the valve body, a valve stem inserted into the middle of the valve cover, the bottom end of the valve stem being fixedly inserted into the ball, the outer wall of the ball and the valve body contacting the valve seat through a support ring and a fireproof ring, the valve seat being fixed to the inner wall of the valve cavity of the valve body, the support ring being disposed on the outer wall of the valve seat, and the inner side of the valve seat being sleeved and connected to the fireproof ring, a positioning block fixed to the top of the ball, a cutting groove being formed in the middle of the positioning block, and a locking groove being formed laterally in the middle of the cutting groove, a locking rod being fixed to the bottom end of the valve stem, and the middle of the locking rod protruding outward to form a convex head structure, and the convex head being locked in the locking groove.

[0008] Furthermore, the locking rods are fixed in an equidistant array on the outside of the valve stem, and the locking grooves are opened in an equidistant array within the cutting groove. The position and size of the locking grooves are adapted to the protrusions, and the bottom end of the valve cover contacts the valve body through a gasket.

[0009] Furthermore, the support ring has an L-shaped cross-section, and a packing is fitted between the valve cover and the valve stem. A packing gland is provided at the top of the packing, and the outer side of the packing gland is fixedly connected to the valve cover by an internal hexagonal socket.

[0010] Furthermore, the top of the valve cover is fixedly connected to the valve body by bolts and nuts, a spring is sleeved between the top of the positioning block and the valve stem, and an upper sealing gasket is sleeved at the bottom of the nut.

[0011] Furthermore, the top end of the valve stem is fixedly connected to the handle.

[0012] Furthermore, the positioning block is a hollow "convex" structure.

[0013] Beneficial effects

[0014] This invention, through its valve stem and ball structure, allows the user to secure the valve stem by engaging the locking rod structure—a protruding head—with the positioning block structure on the ball. The positioning block contains a cutting groove and a locking slot, which secure the protruding head / locking rod to the locking slot. During use, the locking rod retracts towards the center, entering the cutting groove and securing itself to the ball via the protruding head structure. This secures the valve stem and ball, enabling power transmission and quick assembly / disassembly. Simultaneously, it prevents the ball from pressing against the lower part of the annular valve seat due to its own weight, thus preventing deformation or failure of the sealing surface of the annular valve seat and ensuring a long-term, stable, and effective sealing effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the valve seat, support ring, and fireproof ring in this utility model;

[0019] Figure 4 This is a cross-sectional view of the valve stem and ball in this utility model;

[0020] Figure 5This is a front cross-sectional view of the valve stem and ball in this utility model.

[0021] The labels in the diagram represent: 1. Valve body; 2. Valve seat; 3. Support ring; 4. Fireproof ring; 5. Ball; 6. Valve stem; 61. Locking rod; 62. Protrusion; 7. Spring; 8. Gasket; 9. Upper sealing gasket; 10. Bolt; 11. Nut; 12. Valve cover; 13. Packing; 14. Packing gland; 15. Socket headstock; 16. Handle; 17. Positioning block; 171. Cut-in groove; 172. Locking groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Example: A long-life sealing floating ball valve, see attached figure. Figure 1 -Appendix Figure 5 The valve includes a valve body 1, a valve cover 12 fixed to the top of the valve body 1, a valve stem 6 inserted into the middle of the valve cover 12, a ball 5 fixedly inserted to the bottom of the valve stem 6, a valve seat 2 in contact with the outer wall of the ball 5 and the valve body 1 through a support ring 3 and a fireproof ring 4, the valve seat 2 and the inner wall of the valve cavity of the valve body 1 are fixed, the support ring 3 is set on the outer wall of the valve seat 2, and the inner side of the valve seat 2 is sleeved and connected to the fireproof ring 4, a positioning block 17 is fixed to the top of the ball 5, a cutting groove 171 is opened in the middle of the positioning block 17, and a locking groove 172 is opened laterally in the middle of the cutting groove 171, a locking rod 61 is fixed to the bottom of the valve stem 6, and the middle of the locking rod 61 protrudes outward to form a protruding head 62 structure, and the protruding head 62 is locked in the locking groove 172;

[0025] The locking rods 61 are fixed at equal intervals on the outside of the valve stem 6, and the locking grooves 172 are opened at equal intervals in the cutting grooves 171. The position and size of the locking grooves 172 are adapted to the protrusions 62. The bottom end of the valve cover 12 contacts the valve body 1 through the gasket 8.

[0026] The support ring 3 has an L-shaped cross-section. A packing 13 is fitted between the valve cover 12 and the valve stem 6. A packing gland 14 is located at the top of the packing 13, and the outer side of the packing gland 14 is fixedly connected to the valve cover 12 via an internal hexagonal socket 15. The top of the valve cover 12 is fixedly connected to the valve body 1 via bolts 10 and nuts 11. A spring 7 is fitted between the top of the positioning block 17 and the valve stem 6, and an upper sealing gasket 9 is fitted at the bottom of the nut 11. The top of the valve stem 6 is fixedly connected to the handle 16. The positioning block 17 has a hollow "convex" structure. Through the structure of the valve stem 6 and the ball 5, the user can insert the valve stem 6 through the locking rod 61 structure at the bottom of the valve stem 6. The protruding head 62 is locked and fixed to the positioning block 17 on the ball 5. The positioning block 17 has a cutting groove 171 and a locking groove 172, which can fix the protruding head 62-locking rod 61 to the locking groove 172. In use, the locking rod 61 can be retracted to the middle and enter the cutting groove 171. It is then fixed and locked to the valve stem 6 and the ball 5 through the protruding head 62 structure and the locking groove 172. This achieves the fixed locking of the valve stem 6 and the ball 5, so power can be transmitted and quick disassembly and assembly can be achieved. At the same time, it can prevent the ball 5 from pressing on the lower part of the annular valve seat 2 due to its own weight, thereby preventing the sealing surface of the annular valve seat 2 from deforming or failing, thus ensuring the long-term stable and effective sealing effect of the annular valve seat 2.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A long-life sealing floating ball valve, characterized in that, The valve includes a valve body (1), a valve cover (12) fixed to the top of the valve body (1), a valve stem (6) inserted into the middle of the valve cover (12), and the bottom end of the valve stem (6) fixedly inserted into a ball (5). The outer wall of the ball (5) and the valve body (1) are in contact with the valve seat (2) through a support ring (3) and a fireproof ring (4). The valve seat (2) is fixed to the inner wall of the valve cavity of the valve body (1). The support ring (3) is set on the outer wall of the valve seat (2). The inner side of the seat (2) is sleeved and connected to the fireproof ring (4). The top of the ball (5) is fixed with a positioning block (17). The positioning block (17) has a cutting groove (171) in the middle and a locking groove (172) is opened laterally in the middle of the cutting groove (171). The bottom end of the valve stem (6) is fixed with a locking rod (61). The middle of the locking rod (61) protrudes outward to form a protruding head (62) structure. The protruding head (62) is locked in the locking groove (172).

2. A long-seal, floating ball valve according to claim 1, characterized in that The locking rods (61) are fixed at equal intervals on the outside of the valve stem (6), and the locking grooves (172) are opened at equal intervals in the cutting groove (171). The position and size of the locking grooves (172) are adapted to the protrusions (62). The bottom end of the valve cover (12) contacts the valve body (1) through the gasket (8).

3. A long-seal, floating ball valve according to claim 1, characterized in that The support ring (3) has an L-shaped cross section. A packing (13) is fitted between the valve cover (12) and the valve stem (6). A packing gland (14) is provided at the top of the packing (13). The outer side of the packing gland (14) is fixedly connected to the valve cover (12) through an internal hexagon (15).

4. A long-seal, floating ball valve in accordance with claim 1, wherein, The top of the valve cover (12) is fixedly connected to the valve body (1) by bolts (10) and nuts (11). A spring (7) is sleeved between the top of the positioning block (17) and the valve stem (6), and an upper sealing gasket (9) is sleeved at the bottom of the nut (11).

5. A long-seal, floating ball valve according to claim 4, characterized in that The top end of the valve stem (6) is fixedly connected to the handle (16).

6. A long-seal, floating ball valve in accordance with claim 1, wherein, The positioning block (17) is a hollow "convex" structure.

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