Improved full-welded ball valve stem

Abstract

The utility model discloses an improved full-welded ball valve stem, including movable sleeve, movable shell, sealing cover and outer rotary rod, and the movable sleeve is sleeved with the inner rotary rod, and the top of movable sleeve is fixed with movable shell, and the top of inner rotary rod is through the movable connection in the bottom of movable shell, and the top of movable shell is fixed with connecting column, and the top of movable shell is fixed with sealing cover, and the outer rotary rod is movably connected in sealing cover, and the bottom of outer rotary rod is fixed with rotary disc, and the bottom of rotary disc is fixed with connecting column, and the upper portion of outer rotary rod is movably connected with movable rod, and one end of movable rod is connected with limiting bolt, and the utility model discloses a movable sleeve, movable shell, sealing cover and outer rotary rod are arranged, and the problem that the sealing effect between the valve stem and ball valve is not high enough, and the valve stem is inconvenient to replace in working is solved.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve assembly technology, and in particular relates to an improved all-welded ball valve stem. Background Technology

[0002] All-welded ball valves are widely used in petroleum, chemical, and natural gas industries. They are made of welded steel pipes and come in both spherical and cylindrical structures. Spherical valve bodies typically have only one weld seam, while cylindrical valve bodies have two. They feature explosion-proof design, and some products also have anti-blowout design to prevent the valve stem from being ejected due to improper operation. However, they still have the following drawbacks in practical use:

[0003] During operation, the valve stem of a ball valve is usually sealed at the joint between the valve stem and the valve body. However, after prolonged operation, relying solely on this method for sealing may gradually increase the possibility of valve leakage, and the sealing stability of the valve stem will decrease.

[0004] Secondly, the valve stem corrodes when exposed to air during operation, which reduces its strength. After prolonged operation, the valve stem needs to be replaced. However, replacing the valve stem requires disassembling the entire valve, which is inconvenient. Utility Model Content

[0005] To address the aforementioned technical deficiencies, the purpose of this utility model is to provide an improved all-welded ball valve stem. By incorporating a movable sleeve, movable shell, sealing cover, and external rotating rod, it solves the problems of insufficient sealing effect between the ball valve stem and the ball valve itself, as well as the inconvenience of replacing the valve stem during operation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an improved all-welded ball valve stem, comprising a movable sleeve, a movable shell, a sealing cover, and an outer rotating rod. An inner rotating rod is fitted inside the movable sleeve. The top end of the movable sleeve is fixed to the movable shell. The top end of the inner rotating rod is movably connected to the bottom end of the movable shell, and a connecting column is fixed to the top end of the movable shell. A sealing cover is fixed to the top end of the movable shell. An outer rotating rod is vertically and movably connected inside the sealing cover. A rotating disk is fixed to the bottom end of the outer rotating rod, and the bottom end of the rotating disk is fixed to the connecting column. A horizontally movably connected movable rod is connected through the upper part of the outer rotating rod. One end of the movable rod is threaded with a limiting bolt. During operation, the inner rotating rod is fitted into the movable sleeve, the connecting column is movably connected to it through the movable shell, the top end of the movable shell is sealed by the sealing cover, and the movable rod is movably connected to it through the outer rotating rod, thus facilitating the installation of the valve stem during operation.

[0007] Furthermore, the bottom end of the movable sleeve is fixedly connected to a valve body, the bottom end of the inner rotating rod is fixedly connected to an insert block, and the insert block is movably connected to the valve core inside the valve body. Several sealing rings are embedded and fixed at equal intervals on the inner wall of the movable sleeve, and the sealing rings are movably connected to the inner rotating rod. When the movable sleeve is working, the flow of fluid is controlled by the valve body.

[0008] An installation ring is fixed to the upper periphery of the movable shell, and the connecting post is movably connected inside the movable shell. The top end of the connecting post is flush with the top end of the installation ring, and the installation ring cooperates to install the sealing cover and the connecting post.

[0009] The sealing cover and the mounting ring are fixed to each other. A rotating cavity is provided at the center of the bottom of the sealing cover, and a movable hole is provided at the center of the top of the sealing cover. The rotating cavity movably connects the rotating disk within it.

[0010] The rotating disk is movably connected inside the rotating cavity, and the outer rotating rod is movably connected inside the movable hole, thus limiting the position of the rotating disk.

[0011] A rubber ring is fixed to the bottom of the sealing cover on the outside of the rotating cavity. The rubber ring abuts against the top of the connecting column. A ball head is fixed to the end of the movable rod away from the limiting bolt, which cooperates with the ball head on the movable rod.

[0012] The beneficial effects of this utility model are as follows: By setting up a movable sleeve, a movable shell, and a sealing cover, the problem of insufficient sealing effect between the valve stem and the ball valve is solved. The connecting column enters the movable shell, aligns the rotating cavity and movable hole at the bottom of the sealing cover with the outer rotating rod, and lowers the outer rotating rod to extend out of the sealing cover. The sealing cover and the mounting ring are installed by mounting bolts, and the outer rotating rod, rotating disk, connecting column, and inner rotating rod are installed in the movable sleeve. During operation, the sealing ring seals the gap between the movable sleeve and the inner rotating rod, and the sealing cover and the rotating disk cooperate to prevent the outer rotating rod from leaking fluid under pressure, resulting in a higher sealing effect between the valve stem and the ball valve.

[0013] By incorporating a movable sleeve, a sealing cap, and an outer rotating rod, the problem of inconvenient valve stem replacement during ball valve operation is solved. When the outer rotating rod needs to be rotated, it is first pulled, causing the rotating disc, connecting column, and inner rotating rod to rotate, thereby opening and closing the valve body. When the valve stem needs to be removed, the limiting bolt on the movable rod is first turned by the handle to unscrew it. The movable rod is then pulled out, and the bolts on the sealing cap are removed. The sealing cap is then pushed upwards to remove it. The movable rod is then reinserted into the outer rotating rod, and pulled until the inner rotating rod is pulled out of the movable sleeve, allowing the valve stem to be disassembled. This makes valve stem disassembly and replacement much more convenient. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0015] Figure 1 This is a schematic diagram of the valve stem section after being cut open in this utility model.

[0016] Figure 2 This is a schematic diagram of the structure after the movable sleeve is cut open.

[0017] Figure 3 This is a schematic diagram of the structure after the movable shell is cut open.

[0018] Figure 4 This is a schematic diagram of the structure after the sealing cap has been cut open.

[0019] Figure 5 This is a schematic diagram of the external rotating rod.

[0020] Figure 6 This is a schematic diagram of the valve stem after assembly.

[0021] Figure 7 This is a structural schematic diagram of a part of the internal rotating rod.

[0022] Appendix Figure 1-7 In the middle: 1. Movable sleeve; 101. Sealing ring; 102. Inner rotating rod; 1021. Insert block; 103. Connecting column; 104. Valve body; 2. Movable shell; 201. Mounting ring; 3. Sealing cover; 301. Rotating cavity; 302. Movable hole; 303. Rubber ring; 4. Outer rotating rod; 401. Rotating disk; 402. Movable rod; 403. Restricting bolt; 404. Ball head. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figure 1-7This utility model relates to an improved all-welded ball valve stem, comprising a movable sleeve 1, a movable shell 2, a sealing cover 3, and an outer rotating rod 4. An inner rotating rod 102 is fitted inside the movable sleeve 1, and the movable sleeve 1 is movably connected to the inner rotating rod 102. When the inner rotating rod 102 rotates, it drives the valve core to rotate, changing the opening and closing action of the valve body 104. The movable shell 2 is fixed to the top of the movable sleeve 1. When the movable shell 2 is in operation, a connecting post 103 is movably connected within it. The top of the inner rotating rod 102 is movably connected to the bottom of the movable shell 2, allowing the inner rotating rod 102 to extend into the movable shell 2. The connecting post 103 is fixed to the top of the movable shell 2, connecting the rotating disk 401 to the movable shell 2. A sealing cover 3 is fixed to the top of the shell 2, which closes the top of the movable shell 2. An outer rotating rod 4 is vertically and movably connected inside the sealing cover 3. During the rotation of the outer rotating rod 4, it drives the connecting column 103 and the inner rotating rod 102 to rotate and connect. A rotating disk 401 is fixed to the bottom of the outer rotating rod 4. The bottom of the rotating disk 401 is fixed to the connecting column 103. The rotating disk 401 restricts the connecting column 103 inside the movable shell 2. A movable rod 402 is horizontally and movably connected to the upper part of the outer rotating rod 4. When the movable rod 402 rotates, it increases the torque of rotating the outer rotating rod 4. A limiting bolt 403 is threaded to one end of the movable rod 402, which restricts the position of the movable rod 402 on the outer rotating rod 4.

[0026] Specifically, the bottom end of the movable sleeve 1 is fixedly connected to the valve body 104, and the bottom end of the inner rotating rod 102 is fixedly connected to the insert block 1021. The insert block 1021 is movably connected to the valve core inside the valve body 104, transmitting the torque of the rotating rod to the valve core. Several sealing rings 101 are evenly embedded and fixed on the inner wall of the movable sleeve 1. The sealing rings 101 are movably connected to the inner rotating rod 102. When the movable sleeve 1 is working, the valve core inside the valve body 104 at its bottom end rotates, controlling the flow of liquid. The sealing rings 101 increase the sealing of the gap between the inner movable rod 402 and the movable sleeve 1.

[0027] Furthermore, an installation ring 201 is fixed to the upper periphery of the movable shell 2, and a connecting post 103 is movably connected inside the movable shell 2. The top end of the connecting post 103 is flush with the top end of the installation ring 201. When the movable shell 2 is in operation, after the installation ring 201 on it is fitted and covers the sealing cover 3, the installation bolt is inserted into the sealing cover 3, then inserted into the installation ring 201, and after it extends out, the installation ring 201 and the sealing cover 3 are installed together by the rotation of the nut.

[0028] The operation process of this embodiment is as follows: During operation, firstly, the sealing cover 3 is removed from the mounting ring 201, then the inner rotating rod 102 is inserted into the movable shell 2, and then into the movable sleeve 1. After the inner rotating rod 102 enters the movable sleeve 1, it moves downward until the insert block 1021 at the bottom of the inner rotating rod 102 is inserted into the valve core in the valve body 104, and the connecting column 103 enters the movable shell 2. Then, the rotating cavity 301 at the bottom of the sealing cover 3 is aligned with the outer rotating rod 4, and the movable hole 302 is aligned with the outer rotating rod 4. The outer rotating rod 4 is then pushed downward so that it extends out of the sealing cover 3. The sealing cover 3 and the mounting ring 201 are installed by the mounting bolts. The outer rotating rod 4, the rotating disk 401, the connecting column 103 and the inner rotating rod 102 are installed in the movable sleeve 1. During operation, the sealing ring 101 seals the gap between the movable sleeve 1 and the inner rotating rod 102, and the sealing cover 3 and the rotating disk 401 cooperate to prevent the outer rotating rod 4 from being subjected to pressure fluid leakage.

[0029] Example 2

[0030] Please see Figure 1-6 Based on the first specific embodiment, the sealing cover 3 and the mounting ring 201 are fixed to each other. A rotating cavity 301 is provided in the center of the bottom of the sealing cover 3, and an movable hole 302 is provided in the center of the top of the sealing cover 3. When the sealing cover 3 is working, the rotating cavity 301 movably connects the rotating disk 401 in it, and the movable hole 302 movably connects the outer rotating rod 4.

[0031] Specifically, the rotating disk 401 is movably connected inside the rotating cavity 301, and the outer rotating rod 4 is movably connected inside the movable hole 302, so that the sealing cover 3 can effectively restrict the rotating disk 401 and the outer rotating rod 4 on the movable shell 2.

[0032] Furthermore, a rubber ring 303 is fixed to the bottom of the sealing cover 3 on the outside of the rotating cavity 301. The rubber ring 303 abuts against the top of the connecting column 103. A ball head 404 is fixed to the end of the movable rod 402 away from the limiting bolt 403. When the sealing cover 3 is working, the rubber ring 303 on it presses against the top of the connecting column 103, sealing the gap between the connecting column 103 and the outer rotating column. The ball head 404 at the end of the movable rod 402 away from the limiting bolt 403 restricts the position of the end of the movable rod 402 away from the limiting bolt 403.

[0033] The operation process of this embodiment is as follows: During operation, when it is necessary to rotate the outer rotating rod 4, first pull the outer rotating rod 4 to drive the rotating disk 401, connecting column 103, and inner rotating rod 102 to rotate, thereby driving the valve body 104 to open and close. When it is necessary to remove the valve stem, first rotate the limiting bolt 403 on the movable rod 402 with the handle to unscrew the limiting bolt 403 from the movable rod 402, then pull out the movable rod 402, remove the bolts on the sealing cover 3, and then push the sealing cover 3 upward to remove the sealing cover 3. Then reinsert the movable rod 402 into the outer rotating rod 4 and pull it until the inner rotating rod 102 is pulled out of the movable sleeve 1 to remove the valve stem.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An improved all-welded ball valve stem, comprising a movable sleeve (1), a movable shell (2), a sealing cover (3), and an outer rotating rod (4), characterized in that: An inner rotating rod (102) is fitted inside the movable sleeve (1). A movable shell (2) is fixed to the top of the movable sleeve (1). The top of the inner rotating rod (102) is movably connected to the bottom of the movable shell (2). A connecting column (103) is fixed to the top of the movable shell (2). A sealing cover (3) is fixed to the top of the movable shell (2). An outer rotating rod (4) is vertically movably connected inside the sealing cover (3). A rotating disk (401) is fixed to the bottom of the outer rotating rod (4). The bottom of the rotating disk (401) is fixed to the connecting column (103). A movable rod (402) is horizontally movably connected to the upper part of the outer rotating rod (4). A limiting bolt (403) is threaded to one end of the movable rod (402).

2. The improved all-welded ball valve stem according to claim 1, characterized in that: The bottom end of the movable sleeve (1) is fixedly connected to the valve body (104), and the bottom end of the inner rotating rod (102) is fixed with a plug (1021). The plug (1021) is movably connected to the valve core inside the valve body (104). Several sealing rings (101) are inlaid and fixed at equal intervals on the inner wall of the movable sleeve (1). The sealing rings (101) are movably connected to the inner rotating rod (102).

3. The improved all-welded ball valve stem according to claim 1, characterized in that: An installation ring (201) is fixed on the upper periphery of the movable shell (2), and the connecting post (103) is movably connected inside the movable shell (2). The top end of the connecting post (103) is flush with the top end of the installation ring (201).

4. The improved all-welded ball valve stem according to claim 3, characterized in that: The sealing cover (3) is fixed to the mounting ring (201). A rotating cavity (301) is provided at the center of the bottom of the sealing cover (3), and a movable hole (302) is provided at the center of the top of the sealing cover (3).

5. The improved all-welded ball valve stem according to claim 4, characterized in that: The rotating disk (401) is movably connected in the rotating cavity (301), and the outer rotating rod (4) is movably connected in the movable hole (302).

6. The improved all-welded ball valve stem according to claim 5, characterized in that: A rubber ring (303) is fixed at the bottom of the sealing cover (3) on the outside of the rotating cavity (301). The rubber ring (303) abuts against the top of the connecting column (103). A ball head (404) is fixed at the end of the movable rod (402) away from the limiting bolt (403).

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