Stainless steel ball valve

Abstract

The utility model discloses a stainless steel ball valve which comprises a first valve body, a middle valve body and a second valve body, the first valve body, the middle valve body and the second valve body are all made of stainless steel materials, the first valve body and the middle valve body are fixed in a welding mode, the second valve body is provided with external threads, the middle valve body is provided with internal threads corresponding to the external threads, and the first valve body and the second valve body are connected in a welded mode. The external thread is in threaded fit with the internal thread; a valve cavity is formed in the middle valve body, a valve ball is rotationally arranged in the valve cavity, a valve sleeve is fixedly arranged on the middle valve body, a valve rod is rotationally arranged in the valve sleeve, and the valve rod is connected with the valve ball in a rotation stopping mode. The valve rod is provided with a handle, an angle limiting structure is arranged between the valve sleeve and the handle, and the angle limiting structure is used for controlling the handle to only rotate and switch between an opening state and a closing state relative to the valve sleeve. The production cost is lower, the manufacturing process is more environment-friendly, and the rotating angle of the handle can be limited.

Description

Technical Field

[0001] The utility model relates to the technical field of water pipe ball valves, in particular to a stainless steel ball valve. Background Art

[0002] Ball valves have developed into a major type of valve with their good sealing performance and high flow capacity, and are widely used in various fields. In high-temperature and high-pressure pipelines in the power, petrochemical and other industries, hard-sealed ball valves are often used to cut off and isolate.

[0003] The existing Chinese patent with announcement number CN218031525U discloses a brass nickel-plated ball valve, including a body, which is made of brass material and a nickel layer is fixedly provided on the surface of the body; the body includes a valve body and a valve ball, the valve body is penetrated by a main flow channel, the valve ball is rotatably connected in the main flow channel, the valve ball is penetrated by a secondary flow channel, and the main flow channel is connected to the secondary flow channel; the end of the main flow channel is threadedly connected to a mounting tube, the end wall of the mounting tube is in contact with the end of the valve ball, and the interior of the mounting tube is connected to the secondary flow channel.

[0004] However, the above-mentioned ball valve has the following disadvantages: the valve body of the ball valve is integrally formed, which is not convenient for the installation of the valve stem; and it is made of brass, which has a high cost and leads to a relatively high price for the ball valve. In addition, the production process of brass is prone to heavy metal pollution, which is not environmentally friendly. Utility Model Content

[0005] The utility model aims to provide a stainless steel ball valve, which has the effects of lower production cost, more environmentally friendly manufacturing process and capable of limiting the rotation angle of the handle.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions: a stainless steel ball valve, comprising a first valve body, an intermediate valve body and a second valve body, wherein the materials of the first valve body, the intermediate valve body and the second valve body are all made of stainless steel, and the first valve body and the intermediate valve body are fixed by welding, the second valve body is provided with an external thread, the intermediate valve body is provided with an internal thread corresponding to the external thread, and the external thread and the internal thread are threadedly matched;

[0007] The intermediate valve body is provided with a valve cavity, a valve ball is rotatably arranged in the valve cavity, a valve sleeve is fixedly arranged in the intermediate valve body, a valve stem is rotatably arranged in the valve sleeve, and the valve stem is non-rotatably connected to the valve ball;

[0008] The valve stem is provided with a handle, and an angle limiting structure is provided between the valve sleeve and the handle, and the angle limiting structure is used to control the handle to rotate and switch between an open state and a closed state only relative to the valve sleeve.

[0009] By adopting the above technical scheme, in the production and assembly stage, the first valve body is welded to one end of the middle valve body, and then the valve stem and the valve ball are installed in the valve cavity, the second valve body is threadedly connected to the other end of the middle valve body, and then the valve sleeve is fixed to the middle valve body, so that the valve stem is inserted into the valve sleeve, and finally the handle is installed on the valve stem to realize the overall assembly. When in use, the valve stem is screwed by the handle, and the valve stem drives the valve ball to rotate in the valve cavity to adjust the water flow rate. In addition, the utility model sets an angle limiting structure between the handle and the valve sleeve, and uses the angle limiting structure to limit the rotation angle of the handle to prevent the handle from excessively rotating relative to the valve sleeve during operation, causing damage to the ball valve. At the same time, all components of the utility model are made of stainless steel, which is different from the brass commonly used in the market. The purchase price of stainless steel is lower, and no heavy metal pollution caused by brass manufacturing will be generated, thereby reducing pollution to the environment and being more environmentally friendly. It has the effects of lower production cost, more environmentally friendly manufacturing process, and limited rotation angle of the handle.

[0010] The utility model is further configured as follows: the valve sleeve is fixedly welded to the intermediate valve body, and the intermediate valve body is provided with a step positioning hole corresponding to the valve sleeve, and the valve sleeve is positioned and matched with the step positioning hole.

[0011] By adopting the above technical solution, the valve sleeve is fixed on the intermediate valve body by welding, which can improve the connection firmness between the valve sleeve and the intermediate valve body. At the same time, before welding, the positioning effect between the step positioning hole and the valve sleeve can be used to improve the accuracy of the installation position of the valve sleeve on the intermediate valve body.

[0012] The utility model is further configured as follows: the angle limiting structure comprises a limiting portion and a stop portion, the limiting portions are symmetrically arranged on both sides of the valve sleeve, the stop portion is extended on the handle, and the stop portion cooperates with the corresponding stop of the limiting portion.

[0013] The utility model is further configured as follows: the valve stem is provided with a plurality of annular grooves, a first sealing ring is provided in the annular groove, and the valve stem and the valve sleeve are sealed by the first sealing ring.

[0014] By adopting the above technical solution, the first sealing ring can improve the water tightness between the valve stem and the inner wall of the valve sleeve, and effectively prevent the ball valve from leaking.

[0015] The utility model is further configured as follows: the intermediate valve body is provided with a first step groove corresponding to the first valve body, the first valve body comprises a plug-in portion, the plug-in portion is plug-fitted with the first step groove and blocks each other.

[0016] By adopting the above technical solution, the accuracy of welding and fixing the first valve body and the middle valve body can be improved by utilizing the insertion and positioning of the insertion part and the first step groove before welding.

[0017] The utility model is further configured as follows: the first valve body and the second valve body are both provided with installation grooves, a second sealing ring is embedded in the installation groove, and the side walls of the valve bodies are sealed with the first valve body and the second valve body respectively through the corresponding second sealing rings.

[0018] By adopting the above technical solution, the second sealing ring can improve the water sealing between the intermediate valve body and the first valve body, and between the intermediate valve body and the second valve body.

[0019] The utility model is further configured as follows: the valve sleeve is provided with a second step groove, the intermediate valve body is provided with a convex ring portion corresponding to the second step groove, the convex ring portion is plug-fitted with the second step groove, and a sealing gasket is provided in the second step groove, and when the convex ring portion is inserted into the second step groove, the sealing gasket is pressed against the step surface of the second step groove by the convex ring portion.

[0020] By adopting the above technical scheme, the sealing gasket can improve the water sealing between the valve sleeve and the intermediate valve body. The plug-in design of the convex ring part and the second step groove increases the friction contact surface between the valve sleeve and the intermediate valve body, thereby improving the anti-detachment property of both. At the same time, the extrusion force between the convex ring part and the step surface of the second step groove is utilized to prevent the formation of gaps between the sealing gasket and the valve sleeve, and between the sealing gasket and the convex ring part of the intermediate valve body, which may cause water leakage.

[0021] The utility model is further configured as follows: a plurality of positioning grooves are provided on the inner wall of the valve sleeve, a plurality of positioning blocks are extended from the outer wall of the convex ring portion corresponding to the positioning grooves, and the positioning blocks are in position-stopping cooperation with the positioning grooves.

[0022] By adopting the above technical solution, when the valve sleeve is relatively installed on the intermediate valve body, the anti-rotation performance between the valve sleeve and the intermediate valve body can be effectively improved, so as to prevent the valve stem from driving the valve sleeve to rotate synchronously relative to the intermediate valve body due to rust at the welding position when the handle is turned, thereby preventing the valve sleeve from breaking when it is turned relative to the intermediate valve body.

[0023] In summary, the utility model has the following beneficial effects:

[0024] The first valve body is welded to one end of the middle valve body, the second valve body is threadedly fixed to the other end of the middle valve body, and the valve sleeve, valve stem and valve ball are fixed to the middle valve body at the same time to realize the overall assembly. In addition, a handle is fixedly connected to the valve stem, and an angle limiting structure is provided between the handle and the valve sleeve. The angle limiting structure allows the handle to be rotated and switched between an open state and a closed state only relative to the valve sleeve. The materials of the first valve body, the middle valve body and the second valve body of the utility model are all made of stainless steel. Different from the brass commonly used in the market, the purchase price of stainless steel is lower, and no heavy metal pollution caused by brass manufacturing is generated, thereby reducing pollution to the environment and being more environmentally friendly. It has the effects of lower production cost, more environmentally friendly manufacturing process, and the ability to limit the rotation angle of the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a specific embodiment of the present utility model.

[0026] Figure 2 It is a longitudinal sectional view of a specific embodiment 1 of the utility model.

[0027] Figure 3 It is an exploded view of a specific embodiment 1 of the utility model.

[0028] Figure 4 It is an exploded view of the second specific embodiment of the utility model, and the handle is not shown.

[0029] Figure 5 It is a structural diagram of the intermediate valve body of the second specific embodiment of the utility model.

[0030] Figure 6 It is a structural diagram of a valve sleeve according to a second specific embodiment of the present utility model.

[0031] In the figure: 1. first valve body; 11. plug-in part; 2. intermediate valve body; 2a. valve cavity; 2b. step positioning hole; 2c. first step groove; 21. internal thread; 23. convex ring; 231. positioning block; 3. second valve body; 3a. mounting groove; 31. external thread; 32. second sealing ring; 4. valve sleeve; 4a. second step groove; 4b. positioning groove; 41. limiting part; 43. sealing gasket; 5. valve ball; 51. valve stem; 51a. annular groove; 511. first sealing ring; 6. handle; 61. stopper. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings. Specific embodiment 1

[0034] A stainless steel ball valve, such as Figure 1-2As shown, it includes a first valve body 1, an intermediate valve body 2 and a second valve body 3. The materials of the first valve body 1, the intermediate valve body 2 and the second valve body 3 are all set to stainless steel, and the first valve body 1 and the intermediate valve body 2 are fixed by welding. The second valve body 3 is provided with an external thread 31, and the intermediate valve body 2 is provided with an internal thread 21 corresponding to the external thread 31, and the external thread 31 and the internal thread 21 are threadedly matched; the intermediate valve body 2 is provided with a valve cavity 2a, and a valve ball 5 is rotatably provided in the valve cavity 2a. The intermediate valve body 2 is fixed with a valve sleeve 4, and a valve stem 51 is rotatably provided in the valve sleeve 4, and the valve stem 51 is non-rotatably connected to the valve ball 5; the valve stem 51 is provided with a handle 6, and an angle limiting structure is provided between the valve sleeve 4 and the handle 6, and the angle limiting structure is used to control the handle 6 to be able to rotate and switch between an open state and a closed state relative to the valve sleeve 4.

[0035] like Figure 2-3As shown, the valve sleeve 4 is welded and fixed to the intermediate valve body 2, and the intermediate valve body 2 is provided with a step positioning hole 2b corresponding to the valve sleeve 4, the valve sleeve 4 is positioned and matched with the step positioning hole 2b, and the valve sleeve 4 is fixed to the intermediate valve body 2 by welding, which can improve the connection firmness between the valve sleeve 4 and the intermediate valve body 2, and at the same time, the positioning effect between the step positioning hole 2b and the valve sleeve 4 before welding can improve the accuracy of the installation position of the valve sleeve 4 on the intermediate valve body 2; the angle limiting structure includes a limiting portion 41 and a stopper 61, the limiting portions 41 are symmetrically arranged on both sides of the valve sleeve 4, and the stopper 61 is extended to the handle On the handle 6, the stopper 61 is matched with the corresponding limit part 41, and two stopper parts 61 are provided, wherein one stopper part 61 is matched with the limit part 41 on one side, and the other stopper part 61 is matched with the limit part 41 on the other side, so that the rotation angle of the stopper part 61 of the handle 6 between the limit parts 41 on both sides is 90 degrees. When the handle 6 is rotated to be consistent with the length direction of the ball valve, the stopper part 61 on one side of the handle 6 abuts against the limit part 41 on the corresponding side. At this time, the ball valve is in a fully open state and the water flow is maximum. When the handle 6 is rotated 90 degrees so that the stopper part 61 on the other side abuts against the limit part 41 on the other side, the ball valve is in a fully open state and the water flow is maximum. When the limiting part 41 of the valve body 51 abuts against the limiting part 41, the ball valve is in a fully closed state and the water flow is minimum; the valve stem 51 is provided with a plurality of annular grooves 51a, and a first sealing ring 511 is provided in the annular groove 51a. The valve stem 51 and the valve sleeve 4 are sealed by the first sealing ring 511. The first sealing ring 511 can improve the water tightness between the valve stem 51 and the inner wall of the valve sleeve 4, and effectively prevent the ball valve from leaking; the intermediate valve body 2 is provided with a first step groove 2c corresponding to the first valve body 1, and the first valve body 1 includes a plug-in part 11, and the plug-in part 11 is plug-fitted with the first step groove 2c and stops each other, and is welded By utilizing the insertion and positioning of the plug-in portion 11 and the first step groove 2c, the accuracy of welding and fixing the first valve body 1 and the intermediate valve body 2 can be improved; the first valve body 1 and the second valve body 3 are both provided with an installation groove 3a, and a second sealing ring 32 is embedded in the installation groove 3a. The side walls of the valve ball 5 are sealed with the first valve body 1 and the second valve body 3 respectively through the corresponding second sealing rings 32. The second sealing ring 32 can improve the water tightness between the intermediate valve body 2 and the first valve body 1, and between the intermediate valve body 2 and the second valve body 3. It should be noted that the welding method adopted in the present invention adopts laser welding.

[0036] The basic working principle of the utility model is as follows: in the production and assembly stage, the first valve body 1 is welded to one end of the intermediate valve body 2, and then the valve stem 51 and the valve ball 5 are installed in the valve cavity 2a, the second valve body 3 is threadedly connected to the other end of the intermediate valve body 2, and then the valve sleeve 4 is fixed to the intermediate valve body 2, so that the valve stem 51 is inserted into the valve sleeve 4, and finally the handle 6 is installed on the valve stem 51 to realize the overall assembly. When in use, the valve stem 51 is screwed by the handle 6, and the valve stem 51 drives the valve ball 5 to rotate in the valve cavity 2a to realize the adjustment of the water flow rate. In addition, the utility model An angle limiting structure is provided between the handle 6 and the valve sleeve 4, and the rotation angle of the handle 6 is limited by the angle limiting structure to prevent the handle 6 from excessively rotating relative to the valve sleeve 4 during operation and causing damage to the ball valve. At the same time, various components of the utility model are made of stainless steel, which is different from the brass commonly used in the market. The purchase cost of stainless steel is lower, and it will not produce heavy metal pollution caused by brass manufacturing, thereby reducing pollution to the environment and being more environmentally friendly. It has the effects of lower production cost, more environmentally friendly manufacturing process, and the ability to limit the rotation angle of the handle 6. Specific embodiment 2

[0038] A stainless steel ball valve, such as Figure 4-6 As shown, the difference between this embodiment and the specific embodiment 1 is that: the valve sleeve 4 is provided with a second step groove 4a, and the intermediate valve body 2 is provided with a convex ring portion 23 corresponding to the second step groove 4a, the convex ring portion 23 is plugged and matched with the second step groove 4a, and a sealing gasket 43 is provided in the second step groove 4a. When the convex ring portion 23 is inserted into the second step groove 4a, the sealing gasket 43 is pressed against the step surface of the second step groove 4a through the convex ring portion 23, and the sealing gasket 43 can improve the water sealing between the valve sleeve 4 and the intermediate valve body 2. The plug-in design of the convex ring portion 23 and the second step groove 4a increases the friction contact surface between the valve sleeve 4 and the intermediate valve body 2, thereby improving the anti-detachment performance of the two. At the same time, the convex ring portion 23 is used to The squeezing pressure between the step surfaces of the second step groove 4a prevents the formation of gaps between the sealing gasket 43 and the valve sleeve 4, and between the sealing gasket 43 and the convex ring portion 23 of the intermediate valve body 2, which may cause water leakage; the inner wall of the valve sleeve 4 is provided with a plurality of positioning grooves 4b, and the outer wall of the convex ring portion 23 is provided with a plurality of positioning blocks 231 corresponding to the positioning grooves 4b. The positioning blocks 231 cooperate with the positioning grooves 4b in a positioning and anti-rotation manner, so that when the valve sleeve 4 is relatively installed on the intermediate valve body 2, the anti-rotation performance between the valve sleeve 4 and the intermediate valve body 2 can be effectively improved, and the valve stem 51 is prevented from driving the valve sleeve 4 to rotate synchronously relative to the intermediate valve body 2 due to rust when the handle 6 is turned, resulting in the valve sleeve 4 being broken when it is turned relative to the intermediate valve body 2.

[0039] The other structures of this embodiment are the same as those of the first embodiment, and will not be described again here.

[0040] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A stainless steel ball valve, comprising a first valve body (1), an intermediate valve body (2) and a second valve body (3), characterized in that: The materials of the first valve body (1), the intermediate valve body (2) and the second valve body (3) are all made of stainless steel, and the first valve body (1) and the intermediate valve body (2) are fixed by welding, the second valve body (3) is provided with an external thread (31), and the intermediate valve body (2) is provided with an internal thread (21) corresponding to the external thread (31), and the external thread (31) and the internal thread (21) are threadably matched; The intermediate valve body (2) is provided with a valve cavity (2a), a valve ball (5) is rotatably arranged in the valve cavity (2a), the intermediate valve body (2) is fixed with a valve sleeve (4), a valve stem (51) is rotatably arranged in the valve sleeve (4), and the valve stem (51) is non-rotatably connected to the valve ball (5); The valve stem (51) is provided with a handle (6), and an angle limiting structure is provided between the valve sleeve (4) and the handle (6), wherein the angle limiting structure is used to control the handle (6) to be rotatable and switchable only between an open state and a closed state relative to the valve sleeve (4).

2. A stainless steel ball valve according to claim 1, characterized in that: The valve sleeve (4) is fixedly welded to the intermediate valve body (2), and the intermediate valve body (2) is provided with a step positioning hole (2b) corresponding to the valve sleeve (4), and the valve sleeve (4) is positioned and matched with the step positioning hole (2b).

3. A stainless steel ball valve according to claim 1, characterized in that: The angle limiting structure comprises a limiting portion (41) and a stop portion (61), wherein the limiting portion (41) is symmetrically arranged on both sides of the valve sleeve (4), and the stop portion (61) is extended on the handle (6), and the stop portion (61) cooperates with the corresponding limit portion (41) to stop.

4. A stainless steel ball valve according to claim 1, characterized in that: The valve stem (51) is provided with a plurality of annular grooves (51a), a first sealing ring (511) is provided in the annular groove (51a), and the valve stem (51) and the valve sleeve (4) are sealed by the first sealing ring (511).

5. A stainless steel ball valve according to claim 1, characterized in that: The intermediate valve body (2) is provided with a first step groove (2c) corresponding to the first valve body (1); the first valve body (1) comprises a plug-in portion (11); the plug-in portion (11) and the first step groove (2c) are plug-fitted and mutually stop each other.

6. A stainless steel ball valve according to claim 5, characterized in that: The first valve body (1) and the second valve body (3) are both provided with a mounting groove (3a), a second sealing ring (32) is embedded in the mounting groove (3a), and the side wall of the valve ball (5) is sealed with the first valve body (1) and the second valve body (3) respectively via the corresponding second sealing ring (32).

7. A stainless steel ball valve according to claim 1, characterized in that: The valve sleeve (4) is provided with a second step groove (4a), and the intermediate valve body (2) is provided with a convex ring portion (23) corresponding to the second step groove (4a). The convex ring portion (23) is plugged into and matched with the second step groove (4a), and a sealing gasket (43) is provided in the second step groove (4a). When the convex ring portion (23) is inserted into the second step groove (4a), the sealing gasket (43) is pressed against the step surface of the second step groove (4a) through the convex ring portion (23).

8. A stainless steel ball valve according to claim 7, characterized in that: The inner wall of the valve sleeve (4) is provided with a plurality of positioning grooves (4b), and the outer wall of the convex ring portion (23) is provided with a plurality of positioning blocks (231) extending corresponding to the positioning grooves (4b), and the positioning blocks (231) are in positional and anti-rotation cooperation with the positioning grooves (4b).

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