Anti-deformation and anti-lock structure of a welded ball valve

Abstract

The utility model belongs to valve technical field, concretely relates to a kind of welding ball valve anti-deformation anti-lock structure, including valve stem, packing box, support plate, pin shaft, left and right body, valve seat, spring, ball, connecting pipe, base and valve body;The connecting pipe is pre-welded into shape with left and right body;Spring hole is opened on the left and right body, the spring is assembled in the spring hole, the valve seat is assembled in left and right body and is abutted with spring;The support plate and ball are all arranged in the interior of valve body, the left and right body are assembled with valve body, the pin shaft is inserted into left and right body, to fix support plate and compress the spring;The valve stem is assembled in packing box, the packing box is assembled with valve body;The base is assembled with valve body.The utility model can disperse and transfer the metal deformation generated in welding process by setting multilayer groove on left and right body, avoid that deformation force is all acted on valve seat and valve rotating matching part.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a welded ball valve anti-deformation and anti-locking structure. Background Technology

[0002] Welded ball valves, as key equipment for realizing the opening and closing and regulation of media in fluid transportation systems, are widely used in industrial fields such as petroleum, chemical, and natural gas. Their structural stability and sealing reliability directly determine the operational safety and efficiency of industrial systems, and they play an irreplaceable role in various high-pressure, high-temperature, or corrosive media transportation scenarios.

[0003] Currently, the manufacturing process of welded ball valves requires the welding and assembly of components such as the valve body, left and right bodies, connecting pipes, and base. Whether manual or automated welding is used, unavoidable technical problems exist during the circumferential welding of the valve. Firstly, extremely high temperatures are generated in localized areas during welding, causing uneven expansion and contraction of the metal material upon cooling, inevitably resulting in welding deformation. This deformation directly affects the valve's core functional components: firstly, it can compress or alter the structure of valve sealing components (such as O-rings), disrupting the tightness of the sealing interface, leading to decreased sealing performance and increasing the risk of media leakage; secondly, it can easily cause deformation and jamming in the valve's rotating parts (such as the assembly of bearings and shafts), preventing the ball from rotating normally and directly causing the valve to lose its on / off regulating function.

[0004] On the other hand, the large amount of heat generated during welding is rapidly transferred to the inside of the valve. When the temperature exceeds the tolerance limit of some core components of the valve (such as non-metallic seals and some low-heat-resistant metal components), it can easily lead to component melting, performance failure, or a significant reduction in service life, further reducing the overall performance and long-term stability of the welded ball valve. The aforementioned problems of sealing failure, rotation jamming, and component damage caused by welding deformation and high temperature have become key bottlenecks restricting the welding quality, reliability, and market application expansion of welded ball valves, and there is an urgent need to propose effective technical solutions to address these existing defects. Utility Model Content

[0005] To address the technical problems existing in the current welded ball valves, this utility model provides a welded ball valve anti-deformation and anti-locking structure.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An anti-deformation and anti-lock structure for a welded ball valve includes a valve stem, a stuffing box, a support plate, a pin, left and right bodies, a valve seat, a spring, a ball, a connecting pipe, a base, and a valve body. The connecting pipe and the left and right bodies are pre-welded together. Spring holes are provided on the left and right bodies, and the springs are fitted into these holes. The valve seats are fitted into the left and right bodies and abut against the springs. The support plate and the ball are both located inside the valve body. The left and right bodies are assembled and connected to the valve body. The pin is inserted into the left and right bodies to fix the support plate and press the springs. The valve stem is fitted into the stuffing box, which is assembled and connected to the valve body. The base is assembled and connected to the valve body.

[0007] The left and right bodies are provided with multiple layers of grooves, which are distributed along the circumference or axial direction of the left and right bodies to disperse the deformation generated during the welding process and increase the heat dissipation area of ​​the left and right bodies.

[0008] The support plate has positioning holes. After the pin is inserted into the left and right bodies, its end cooperates with the positioning holes to achieve precise fixation of the support plate in the valve body.

[0009] One end of the spring abuts against the inner wall of the spring hole in the left and right bodies, and the other end abuts against the end face of the valve seat, so that the valve seat always has a preload force in the direction of the ball.

[0010] The pre-welding of the connector to the left and right bodies is a full circumferential weld to ensure the airtightness of the connection between the connector and the left and right bodies.

[0011] The welding of the stuffing box to the valve body and the welding of the base to the valve body are both sealed welding to prevent the medium from leaking from the welding parts.

[0012] The ball is located on one side of the support plate, and the support plate limits the radial position of the ball within the valve body.

[0013] Compared with the prior art, the advantages of this utility model are: 1. This utility model, by setting multiple grooves on the left and right bodies, can disperse and transfer the metal deformation generated during the welding process, avoiding the deformation force acting entirely on the valve seat and the valve's rotating mating parts. On the one hand, it can reduce the squeezing effect of deformation on the valve seat structure, ensuring that the valve seat and ball always maintain a tight fit, effectively avoiding sealing gaps caused by deformation, and reducing the risk of media leakage; on the other hand, it can prevent the problem of jamming in rotating parts such as bearings caused by deformation, ensuring that the ball can rotate flexibly, avoiding valve seizure failure, and significantly improving the core functional reliability of the welded ball valve.

[0014] 2. The multi-layered groove design of the left and right bodies of this utility model increases the heat dissipation area of ​​the welding parts, which can quickly dissipate the large amount of heat generated during the welding process, reducing the temperature of the welded parts and the core components inside the valve. This effectively prevents the high temperature from exceeding the tolerance limit of the components, preventing problems such as melting and performance failure due to high temperature, extending the overall service life of the valve, and reducing the damage of high temperature to the structural stability of the components, further ensuring the long-term performance of the welded ball valve.

[0015] 3. This utility model optimizes the structural assembly and welding sequence, and combines the deformation and temperature control effects of multi-layer grooves to significantly reduce the overall impact of temperature fluctuations and media corrosion on the valve. Even under conditions of frequent temperature changes or complex media properties, it can maintain stable valve seat preload, reliable sealing interface, and flexible rotating parts, ensuring that the valve has good adaptability and long-term operational stability in different application scenarios, thus expanding the application range of welded ball valves. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the support plate of this utility model; Figure 3 This is an enlarged view of the left and right body grooves of this utility model.

[0019] Wherein: 1 is valve stem, 2 is stuffing box, 3 is support plate, 4 is pin, 5 is left and right body, 6 is valve seat, 7 is ball, 8 is pipe, 9 is base, and 10 is valve body. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. These descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the claims of this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] This embodiment provides a welded ball valve anti-deformation and anti-locking structure, such as... Figure 1-3 As shown, the components are first pre-assembled and positioned. The connecting pipe 8 and the left and right bodies 5 are pre-welded to form a basic connection unit. Then, springs are installed in the spring holes of the left and right bodies 5. The valve seat 6 is then assembled into the left and right bodies 5, so that one end of the spring abuts against the inner wall of the spring hole of the left and right bodies 5 and the other end abuts against the end face of the valve seat 6, providing a foundation for the pre-tightening force of the valve seat 6 towards the ball 7. Next, the support plate 3 and the ball 7 are placed into the valve body 10 in sequence, and the left and right bodies 5 are assembled and connected to the valve body 10. At the same time, the pin 4 is inserted into the left and right bodies 5. The support plate 3 is precisely fixed in the valve body 10 through the cooperation of the pin 4 and the support plate 3. During the fixing process, the pin 4 further compresses the spring to ensure that the valve seat 6 and the ball 7 are initially fitted to ensure the initial sealing state. After that, the valve stem 1 is assembled into the stuffing box 2, and then the stuffing box 2 and the base 9 are assembled into the valve body 10 respectively.

[0024] Welding is then performed in a specific order: first, the stuffing box 2 is welded to the valve body 10, and the base 9 is welded to the valve body 10; finally, the left and right bodies 5 are welded to the valve body 10. This welding sequence avoids early deformation caused by welding the left and right bodies 5 first, which could affect the assembly accuracy of subsequent components. During the welding process, the multi-layered grooves on the left and right bodies 5 play a key role. On the one hand, they can disperse and transfer the metal deformation generated by welding, avoiding the deformation force from being concentrated on the valve seat 6 and the valve rotation-related parts. This prevents the valve seat 6 from detaching from the fit with the ball 7 due to deformation and avoids the rotating parts from getting stuck due to deformation, ensuring that the ball 7 can rotate flexibly to prevent seizing. On the other hand, the multi-layered grooves increase the heat dissipation area of ​​the left and right bodies 5, which can quickly dissipate the high temperature heat generated by welding, preventing the valve seat 6, seals and other core components from melting or failing due to high temperature.

[0025] During normal operation, the spring continuously provides preload to ensure that the valve seat 6 and the ball 7 are always tightly fitted to maintain sealing performance. The support plate 3, under the fixing action of the pin 4, limits the radial position of the ball 7 to prevent the ball 7 from shifting and affecting sealing and rotation. The overall structure after welding and structural optimization can significantly reduce the impact of temperature fluctuations and media on the components, ultimately achieving a stable working state with reliable valve sealing, flexible rotation, and anti-deformation and anti-locking properties.

[0026] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A welded ball valve anti-deformation and anti-lock structure, characterized in that: The valve body includes a valve stem (1), a stuffing box (2), a support plate (3), a pin (4), left and right bodies (5), a valve seat (6), a spring, a ball (7), a connecting pipe (8), a base (9), and a valve body (10). The connecting pipe (8) and the left and right bodies (5) are pre-welded together. The left and right bodies (5) have spring holes, and the springs are installed in the spring holes. The valve seat (6) is installed in the left and right bodies (5) and abuts against the springs. The support plate (3) and the ball (7) are both located inside the valve body (10). The left and right bodies (5) are assembled and connected to the valve body (10). The pin (4) is inserted into the left and right bodies (5) to fix the support plate (3) and press the spring. The valve stem (1) is installed in the stuffing box (2), and the stuffing box (2) is assembled and connected to the valve body (10). The base (9) is assembled and connected to the valve body (10).

2. The anti-deformation and anti-locking structure for a welded ball valve according to claim 1, characterized in that: The left and right bodies (5) are provided with multiple grooves. The multiple grooves on the left and right bodies (5) are distributed along the circumference or axial direction of the left and right bodies (5) to disperse the deformation generated during the welding process and increase the heat dissipation area of ​​the left and right bodies (5).

3. The anti-deformation and anti-locking structure for a welded ball valve according to claim 1, characterized in that: The support plate (3) has a positioning hole. After the pin (4) is inserted into the left and right bodies (5), its end cooperates with the positioning hole to achieve precise fixation of the support plate (3) in the valve body (10).

4. The anti-deformation and anti-locking structure for a welded ball valve according to claim 1, characterized in that: One end of the spring abuts against the inner wall of the spring hole of the left and right bodies (5), and the other end abuts against the end face of the valve seat (6), so that the valve seat (6) always has a preload force in the direction of the ball (7).

5. The anti-deformation and anti-locking structure for a welded ball valve according to claim 1, characterized in that: The pre-welding of the connector (8) to the left and right bodies (5) is a full circumferential weld to ensure the sealing of the connection between the connector (8) and the left and right bodies (5).

6. The anti-deformation and anti-locking structure for a welded ball valve according to claim 1, characterized in that: The welding of the stuffing box (2) to the valve body (10) and the welding of the base (9) to the valve body (10) are both sealed welding to prevent the medium from leaking from the welding parts.

7. The anti-deformation and anti-locking structure for a welded ball valve according to claim 1, characterized in that: The ball (7) is located on one side of the support plate (3), and the support plate (3) limits the radial position of the ball (7) within the valve body (10).

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