Heat supply all-welded floating ball valve
Through the combination of a fully welded structure and spiral or wave spring, the serious wear of the seal ring of the traditional floating ball valve is solved, and the sealing effect with zero leakage and the long life of the valve is achieved.
Patent Information
- Application Number
- CN202422576216.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The thrust of the disc spring of the traditional floating ball valve is nonlinear, resulting in severe wear of the seal ring, short valve life, and weakening of sealing with use time.
It adopts a fully welded structure, combined with a spiral or corrugated spring to provide linear thrust, the sealing ring and the support ring form a uniform force, and is equipped with a double inclined slag discharge groove and a boss scraper structure to achieve uniform force of the sealing ring and prevent impurities from entering.
It achieves a sealing effect with zero leakage, the sealing ring is subjected to uniform stress, prevents excessive compression, extends the valve life, and improves sealing performance.
Smart Images
Figure CN223137097U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of floating ball valves, in particular to a fully welded floating ball valve for heating. Background Technique
[0002] The sphere of the floating ball valve is floating. Under the action of the medium pressure, the sphere can produce a certain displacement and tightly press on the sealing surface at the outlet end to ensure the sealing at the outlet end. In the north in winter, the weather is cold and heating is required. The medium in the heating pipe network is water and water vapor, and the medium temperature is about 130°C. A large number of valves are needed for the branch lines of the heating pipe network to enter households. Currently, most of the existing valves are floating ball valves. Generally, the floating ball valve uses a disc spring and a valve seat sealing ring type for sealing. The disc spring provides a preloading thrust to push the valve seat sealing ring to hold the ball for sealing. When there is a medium in the pipeline, the pressure of the medium again pushes the valve seat sealing ring to hold the ball for sealing.
[0003] In the use process of traditional floating ball valves, it is found that the disc spring has variable rigidity characteristics, the generated thrust is non-linearly changed, the deformation of the disc spring is small, and the compressed deformation size is difficult to control. The generated thrust fluctuation is large and difficult to control. The torque of the fully welded floating ball valve produced by this structure is generally large, the valve seat sealing ring is subjected to a large extrusion force, the sealing ring is relatively easy to wear, and the valve life is not long. In addition, traditional floating ball valves are mostly two-piece or three-piece, and their compressive resistance and sealing performance gradually deteriorate with the increase of use time. Content of the Utility Model
[0004] (I) Technical Solution
[0005] In order to solve the above technical problems, the utility model provides a fully welded floating ball valve for heating.
[0006] The specific technical solution is as follows:
[0007] A fully welded floating ball valve for heating, including a valve body, an upper valve body, a left body, a right body, a sphere, a valve stem and a handle. The upper part of both sides of the valve body is provided with openings and holes. The upper valve body is inserted into the upper holes of the valve body, and both sides of the contact position between the valve body and the upper valve body are fixedly connected by circumferential welding. The left body and the right body are respectively fixed to the openings on both sides of the valve body by circumferential welding. The sphere is placed inside the valve body, and gaskets are provided at the connection positions. The valve stem is placed inside the upper valve body. The sphere and the valve stem cooperate with each other. The upper part of the valve stem is fixed to the handle by bolts. By rotating the handle, the sphere is driven to rotate to realize the opening and closing of the valve.
[0008] Furthermore, a T-shaped step is provided at the connection between the valve body and the upper valve body, and a V-shaped groove is provided at the connection between the valve body and the left body and the right body. The circumferential welding filler is filled in the V-shaped groove.
[0009] Further, sealing components are provided inside the mutually facing sides of the left body and the right body. The sealing components include a sealing ring, a support ring, an O-ring, and a spring. The sealing ring is an annular ring, one side of which contacts the sphere and the other side of which is fixed to the support ring. A groove is provided on the outer wall of the sealing ring, and the O-ring is provided in the groove. Mounting holes are provided in the left body and the right body, and the spring is disposed in the mounting holes. The support ring pushes and holds the sphere in a sealed manner along the axial direction of the left body and the right body under the action of the spring. The spring is a helical spring or a corrugated spring.
[0010] Further, an inclined slope surface is provided on the contact surface between the support ring and the left body, and a double-slope slag discharge groove is formed between the left body and the support ring.
[0011] Further, a boss is provided on the contact surface between the sealing ring and the sphere.
[0012] Further, a valve stem sealing component is provided between the valve stem and the upper valve body. The valve stem sealing component includes a packing, a packing pressing plate, and a positioning pin arranged from bottom to top. The packing is filled between the upper valve body and the valve stem. The packing pressing plate presses the packing. The positioning pin passes through the valve stem positioning pin hole and is connected for switch positioning on the upper valve body. A protrusion cooperating with the positioning pin is provided on the upper valve body.
[0013] Further, an annular groove is provided on the valve stem, and an O-ring is also provided in the groove.
[0014] Further, the clearance between the outer diameters of the sealing ring and the support ring and the inner diameters of the corresponding left body or right body is 0.15 - 0.2 mm, and the clearance between the sealing ring and the valve body is 0.5 - 0.7 mm.
[0015] (2) Beneficial effects
[0016] Compared with the prior art, the technical solution proposed by the present utility model has the following advantages: The upper valve body, the valve body, the left body, and the right body are all welded by full-automatic submerged arc welding, and the upper valve body, the valve body, the left body, and the right body form a fully welded integral structure. There is no need for additional seals between the upper valve body and the valve body, the valve body, the left body, and the right body. There is no possibility of external leakage of the valve body, and the valve body is safer and more reliable. The thrust provided by the spring changes linearly, the sealing ring is uniformly stressed, the sealing ring will not be over-extruded, the reciprocating axial ball-holding sealing movement of the sealing ring is smooth, the sealing performance is excellent, and zero leakage is achieved. A double-slope slag discharge groove is provided between the left body and the right body and the support ring, which can effectively prevent impurities from entering the valve seat sealing area. Brief description of the drawings
[0017] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 Structural schematic diagram of the present utility model;
[0019] Figure 2 For Figure 1 Enlarged view of part A in
[0020] Figure 3 For Figure 1 Enlarged view of part B in
[0021] Figure 4 For Figure 1 Enlarged view of part C in Detailed implementation manners
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the utility model. The described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the utility model.
[0023] In the related prior art, during the use of traditional floating ball valves, it is found that the disc spring has variable rigidity characteristics, the generated thrust is non-linearly variable, the deformation of the disc spring is small, the compression deformation size is difficult to control, the generated thrust fluctuation is large and difficult to control. The torque of the fully welded floating ball valve produced by this structure is generally large, the valve seat sealing ring is subjected to a large extrusion force, the sealing ring is relatively easy to wear, and the valve life is not long. In addition, traditional floating ball valves are mostly two-piece or three-piece, and the compressive resistance and sealing performance gradually deteriorate with the increase of use time.
[0024] To solve the problems existing in the related prior art, the present utility model proposes a fully welded floating ball valve for heating. The principle and structure of the present utility model will be described in detail below in conjunction with the drawings and embodiments.
[0025] Please refer to Figures 1 to 4, the present utility model proposes a fully welded floating ball valve for heating, which includes a valve body 1, an upper valve body 2, a left body 3, a right body 4, a ball 5, a valve stem 6 and a handle 7. The upper part of both openings on both sides of the valve body 1 is provided with openings. The upper valve body 2 is inserted into the upper holes of the valve body 1, and both sides of the contact position between the valve body 1 and the upper valve body 2 are fixedly connected by circumferential welding. The left body 3 and the right body 4 are respectively fixed to the openings on both sides of the valve body 1 by circumferential welding. The ball 5 is placed inside the valve body 1, and the valve stem 6 is placed inside the upper valve body 2. A gasket is provided at the connection. The ball 5 and the valve stem 6 cooperate with each other. The upper part of the valve stem 6 is fixed to the handle by bolts. By rotating the handle 7, the ball 5 is driven to rotate to realize the opening and closing of the valve.
[0026] Among them, the upper valve body 2, the valve body 1, the valve body 1, the left body 3 and the right body 4 form a fully welded integral structure, without the need for additional seals for sealing, and there is no possibility of external leakage of the valve body, making the valve body safer and more reliable.
[0027] Specifically, the valve body 1 is cylindrical, with a cylindrical cavity inside to form a passage. The ball 5 is arranged inside the passage, and a movable passage for cooperating with the passage is correspondingly arranged on the ball. By rotating the ball 5 inside the valve body 1, the opening and closing of the passage are formed. The left body 3 and the right body 4 are welded to both sides of the valve body 1. A T-shaped step is provided at the connection between the valve body 1 and the upper valve body 2, and a V-shaped groove is provided at the connection between the valve body 1 and the left body 3 and the right body 4. The circumferential welding filler is filled in the V-shaped groove.
[0028] Sealing components 8 are provided inside both sides of the left body 3 and the right body 4 facing each other. The sealing components 8 include a sealing ring 8a, a support ring 8b, an O-ring 8c and a spring 8d. The sealing ring 8a is an annular ring, one side contacts the ball 5, and the other side is fixed to the support ring 8b. A groove is provided on the outer wall of the sealing ring 8a, and the O-ring 8c is arranged in the groove. Installation holes are provided in the left body 3 and the right body 4, and the spring 8d is arranged in the installation holes. Under the action of the spring 8d, the support ring 8b pushes the sealing ring 8a along the axial direction of the left body 3 and the right body 4 to hold the ball in a sealed state. The spring 8d is a helical spring or a corrugated spring. A number of installation holes are provided around the left body 3 and the right body 4, and a helical spring or a corrugated spring is used to form a thrust on the support ring 8b to press the sealing ring 8a against the side of the ball 5 to complete the sealing. The thrust provided by the helical spring and the corrugated spring changes linearly, and the sealing ring is evenly stressed. On the one hand, it ensures the sealing performance, and on the other hand, it effectively prevents jamming and inability to rotate.
[0029] During the process of welding the valve body, the left body and the right body, axial shrinkage and radial shrinkage will occur due to heat. Axial shrinkage will cause the axial gap between the left and right bodies, the sealing ring and the ball to become smaller, and radial shrinkage will cause the inner circle of the sealing ring position of the left and right bodies to become slightly smaller as a whole. Therefore, the clearance between the outer diameter of the sealing ring and the support ring and the inner diameter of the corresponding left or right body is 0.15 - 0.2 mm, and the clearance between the sealing ring and the valve body is 0.5 - 0.7 mm. In this way, after welding is completed, the normal displacement of the sealing ring 8a and the support ring 8b is ensured to ensure sealing and prevent jamming.
[0030] The contact surface between the support ring 8b and the left body 3 is provided with an inclined slope surface, and a double-slope slag discharge groove 10 is formed between the left body 3 and the support ring 8b to prevent impurities from entering the valve seat area. The contact surface between the sealing ring 8a and the sphere 5 is provided with a boss, and the boss forms an effect similar to a scraper. During the rotation of the sphere 5, the boss scrapes off the water vapor attached to the surface of the sphere and takes it away with the fluid, further improving the sealing effect.
[0031] A valve stem seal assembly 9 is provided between the valve stem 6 and the upper valve body 2. The valve stem seal assembly 9 includes a packing 9a, a packing pressing plate 9b, and a positioning pin 9c arranged from bottom to top. The packing 9a is filled between the upper valve body 2 and the valve stem 6, the packing pressing plate 9b presses the packing 9a, and the positioning pin 9c passes through the positioning pin hole of the valve stem 6 for on-off positioning connection on the upper valve body 2. There is a protrusion on the upper valve body that cooperates with the positioning pin 9c. The positioning pin is horizontally inserted on the valve stem 6, and the protrusion can effectively cooperate with the positioning pin 9c to limit the rotation of the valve stem 6. Generally, the rotation angle is limited to 90 degrees. There is an annular groove on the valve stem 6, and an O-ring 8c is also arranged in the groove to further improve the sealing effect.
[0032] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A fully welded floating ball valve for heat supply, characterized in that: It includes a valve body (1), an upper valve body (2), a left body (3), a right body (4), a sphere (5), a valve stem (6) and a handle (7). The upper part of the two openings on both sides of the valve body (1) is provided with holes. The upper valve body (2) is inserted into the holes in the upper part of the valve body (1), and both sides of the contact position between the valve body (1) and the upper valve body (2) are fixedly connected by circumferential welding. The left body (3) and the right body (4) are respectively fixed to the openings on both sides of the valve body (1) by circumferential welding. The sphere (5) is placed inside the valve body (1), and the valve stem (6) is placed inside the upper valve body (2). A gasket is provided at the connection. The sphere (5) and the valve stem (6) cooperate with each other. The upper part of the valve stem (6) is fixed to the handle by bolts. By rotating the handle (7), the sphere (5) is driven to rotate, realizing the opening and closing of the valve.
2. The fully welded floating ball valve for heat supply according to claim 1, wherein: A T-shaped step is provided at the connection between the valve body (1) and the upper valve body (2). A V-shaped groove is provided at the connection between the valve body (1) and the left body (3) and the right body (4). The circumferential welding filler is filled in the V-shaped groove.
3. The all-welded floating ball valve for heat supply according to claim 1, wherein: Sealing components (8) are provided inside the opposite sides of the left body (3) and the right body (4). The sealing component (8) includes a sealing ring (8a), a support ring (8b), an O-ring (8c) and a spring (8d). The sealing ring (8a) is an annular ring, one side contacts the sphere (5), and the other side is fixed to the support ring (8b). A groove is provided on the outer wall of the sealing ring (8a), and the O-ring (8c) is provided in the groove. Installation holes are provided in the left body (3) and the right body (4). The spring (8d) is provided in the installation holes. Under the action of the spring (8d), the support ring (8b) pushes the sealing ring (8a) along the axial direction of the left body (3) and the right body (4) to hold the sphere in a sealed state. The spring (8d) is a helical spring or a corrugated spring.
4. The all-welded floating ball valve for heat supply according to claim 3, characterized in that: An inclined slope surface is provided on the contact surface between the support ring (8b) and the left body (3), and a double-slope slag discharge groove (10) is formed between the left body (3) and the support ring (8b).
5. The all-welded floating ball valve for heat supply according to claim 4, wherein: A convex platform is provided on the contact surface between the sealing ring (8a) and the sphere (5).
6. A fully welded floating ball valve for heating according to claim 1, characterized in that: A valve stem sealing component (9) is provided between the valve stem (6) and the upper valve body (2). The valve stem sealing component (9) includes a packing (9a), a packing pressing plate (9b) and a positioning pin (9c) arranged from bottom to top. The packing (9a) is filled between the upper valve body (2) and the valve stem (6). The packing pressing plate (9b) presses the packing (9a). The positioning pin (9c) passes through the positioning pin hole of the valve stem (6) and is positioned and connected to the upper valve body (2). A protrusion cooperating with the positioning pin (9c) is provided on the upper valve body.
7. A fully welded floating ball valve for heat supply according to claim 1, characterized in that: An annular groove is provided on the valve stem (6), and an O-ring (8c) is also provided in the groove.
8. The fully welded floating ball valve for heat supply according to claim 3, characterized in that: The outer diameter of the sealing ring and the support ring has a clearance of 0.15 - 0.2 mm with the inner diameter of the corresponding left body or right body, and the clearance between the sealing ring and the valve body is 0.5 - 0.7 mm.