Positioning tool for machining of valve body of rotary wear-resistant valve

Abstract

The application relates to a positioning tool for processing a rotary wear-resistant valve body, and belongs to the technical field of positioning tools, which comprises a main positioning mechanism and a secondary positioning mechanism installed on a bottom plate, and the main positioning mechanism and the secondary positioning mechanism are both used for positioning the valve body; the main positioning mechanism comprises a main vertical adjusting assembly, a main horizontal adjusting assembly and a locking assembly, the locking assembly is installed on the main horizontal adjusting assembly, and the main horizontal adjusting assembly is installed on the main vertical adjusting assembly; the secondary positioning mechanism comprises a secondary vertical adjusting assembly, a secondary horizontal adjusting assembly and a secondary positioning piece, the secondary positioning piece is installed on the secondary horizontal adjusting assembly, and the secondary horizontal adjusting assembly is installed on the secondary vertical adjusting assembly; the main positioning mechanism is used for realizing core positioning and bearing of the valve body, and the secondary positioning mechanism provides auxiliary positioning constraint; the two cooperate to improve the stability of the valve body in the drilling process, and effectively solve the displacement or rotation problem of the special-shaped valve body caused by unbalanced stress in the drilling process.

Description

Technical Field

[0001] This application relates to the technical field of positioning fixtures, and in particular to a positioning fixture for machining the body of a rotary wear-resistant valve. Background Technology

[0002] Rotary wear-resistant valves, as important fluid control components, typically have their valve bodies integrally formed from high-strength wear-resistant materials using a casting process. After the valve body is cast, high-precision drilling is performed on specific sealing surfaces. These holes are primarily used to install mating valve bodies, and the positional accuracy and angle of these holes are crucial for overall assembly accuracy and sealing performance.

[0003] Rotary wear-resistant valves have a curved outer contour. Traditional general-purpose clamps (such as flat-jaw pliers and three-jaw chucks) or simple support blocks are mainly designed for regular geometric shapes (such as cylinders and planes). When used to clamp valve bodies with complex curved surfaces, it is difficult to provide a stable, reliable, and deformation-free clamping force. During drilling, the valve body is prone to loosening, displacement, or even rotation, making it difficult to guarantee machining accuracy and potentially damaging the workpiece or cutting tool. Utility Model Content

[0004] To improve the stability of drilling the valve body of a rotary wear-resistant valve, this application provides a positioning fixture for machining the valve body of a rotary wear-resistant valve.

[0005] The positioning fixture for machining the body of a rotary wear-resistant valve provided in this application adopts the following technical solution: A positioning fixture for machining a rotary wear-resistant valve body includes a base plate, a main positioning mechanism, and a secondary positioning mechanism. Both the main and secondary positioning mechanisms are mounted on the base plate and are used to position the valve body. The main positioning mechanism includes a main vertical adjustment component, a main horizontal adjustment component, and a locking component. The locking component is mounted on the main horizontal adjustment component, and the main horizontal adjustment component is mounted on the main vertical adjustment component. The secondary positioning mechanism includes a secondary vertical adjustment component, a secondary horizontal adjustment component, and a secondary positioning element. The secondary positioning element is mounted on the secondary horizontal adjustment component, and the secondary horizontal adjustment component is mounted on the secondary vertical adjustment component.

[0006] By adopting the above technical solution, the base plate provides an installation reference for both the main positioning mechanism and the secondary positioning mechanism. The main positioning mechanism achieves core positioning and load-bearing of the valve body, while the secondary positioning mechanism provides auxiliary positioning constraints. The two mechanisms work together to improve the stability of the valve body during drilling, effectively solving the problem of displacement or rotation caused by unbalanced forces on irregularly shaped valve bodies during drilling.

[0007] Preferably, the main vertical adjustment assembly includes a support block, a vertical support rod, a main vertical adjustment component, and a vertical adjustment block; the support block is connected to the base plate, the vertical support rod is connected to the support block, the vertical adjustment block is slidably connected to the vertical support rod, the end of the main vertical adjustment component is connected to the support block, and the vertical adjustment block is also connected to the main vertical adjustment component; the main vertical adjustment component is used to adjust the height of the vertical adjustment block.

[0008] By adopting the above technical solution, the vertical support rod is fixedly connected to the support block, and the main vertical adjustment component is the main vertical adjustment screw. The main vertical adjustment screw drives the vertical adjustment block to slide along the axis of the vertical support rod, thereby adapting to the positioning requirements of valve bodies at different heights.

[0009] Preferably, the main lateral adjustment assembly includes a first slide rod, a connecting rod, a positioning plate, and a lateral adjustment component. The first slide rod is slidably connected to a vertical adjustment block. The positioning plate is connected to the end of the first slide rod near the valve body and is also slidably connected to the vertical adjustment block. The connecting rod is connected to the end of the first slide rod away from the valve body. The end of the lateral adjustment component is connected to the vertical adjustment block, and the connecting rod is also connected to the lateral adjustment component. The lateral adjustment component is used to adjust the horizontal distance between the positioning plate and the valve body. The positioning plate is used to position the valve body on the base plate.

[0010] By adopting the above technical solution, the lateral adjustment component is a lateral adjustment screw. The lateral adjustment screw moves by driving the connecting rod, thereby driving the positioning plate to finely adjust the horizontal position so that the positioning plate is aligned with the horizontal position of the valve body mounting plate. Then, by vertically adjusting and pressing down the positioning plate, the valve body is positioned on the base plate.

[0011] Preferably, the locking assembly is mounted on the positioning plate. The locking assembly includes a locking plate and a locking member. The locking plate is slidably connected to the positioning plate, and the end of the locking member is connected to the locking plate. The locking member is also threadedly connected to the positioning plate. The locking member is used to adjust the vertical distance between the locking plate and the positioning plate. The locking plate is used to lock the valve body onto the positioning plate.

[0012] By adopting the above technical solution, the locking component is a locking screw, and the locking plate is slidably connected to the positioning plate through the locking support rod to form an adaptive clamping space. The locking screw drives the locking plate to move vertically upward, and works with the positioning plate to clamp the mounting plate of the valve body, thus preventing the valve body from loosening during drilling.

[0013] Preferably, a slide rail is connected to the base plate, the secondary vertical adjustment component includes a support cylinder, a slider and a secondary vertical adjustment rod, the slider is slidably connected to the slide rail, the support cylinder is connected to the slider, the secondary vertical adjustment rod is threadedly connected to the support cylinder, the secondary horizontal adjustment component is connected to the secondary vertical adjustment rod, and the secondary vertical adjustment rod is used to adjust the height of the secondary horizontal adjustment component.

[0014] By adopting the above technical solution, the slider slides along the length of the slide rail to realize the overall position adjustment of the secondary positioning mechanism on the base plate, so that the secondary positioning component can flexibly change the optimal positioning point according to the contour characteristics of the valve body; the threaded engagement between the secondary vertical adjustment rod and the support cylinder drives the secondary horizontal adjustment component to rise and fall, thereby adapting to the positioning requirements of valve bodies of different heights.

[0015] Preferably, the secondary lateral adjustment assembly includes a sliding support rod and a second slide rod. The sliding support rod is connected to the secondary vertical adjustment rod, the second slide rod is connected to the sliding support rod, and the secondary positioning member is connected to the second slide rod. The secondary lateral adjustment assembly is used to adjust the horizontal distance between the secondary positioning member and the valve body.

[0016] By adopting the above technical solution, the rotation of the sliding support rod around the secondary vertical adjustment rod enables the secondary positioning component to freely adjust its angle in the horizontal plane, and the sliding of the second slide rod along the sliding support groove provides horizontal telescopic adjustment. The two work together to achieve a composite adjustment of the angle and length of the secondary positioning component in the horizontal direction, thereby expanding the coverage of auxiliary positioning.

[0017] Preferably, the secondary positioning component is a secondary positioning screw, which is threaded onto the second slide rod and is used to position the valve body on the base plate.

[0018] By adopting the above technical solution, the secondary positioning screw is threadedly connected to the second slide bar. The secondary positioning screw can apply vertical downward pressure to the valve body, thereby further constraining the valve body and improving positioning stability.

[0019] Preferably, a positioning block is rotatably connected to the lower end of the secondary positioning screw.

[0020] By adopting the above technical solution, when the secondary positioning screw rotates and presses down, it is the positioning block that contacts the valve body mounting plate, rather than the end of the positioning screw, thereby effectively preventing the secondary positioning screw from scratching the top wall of the valve body mounting plate.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The main positioning mechanism clamps the valve body mounting plate bidirectionally through the positioning plate and locking plate, providing the main load-bearing capacity and vertical constraint to ensure the rigid fixation of the valve body during drilling. The secondary positioning mechanism, driven by the secondary positioning screw, presses down on the edge of the mounting plate to form an auxiliary clamping force, effectively preventing the valve body from rotating or shifting horizontally due to its curved surface structure, thus compensating for the shortcomings of traditional fixtures in constraining irregular workpieces.

[0022] 2. The vertical adjusting block is driven to rise and fall along the vertical support rod by the main vertical adjusting screw, thereby controlling the height of the locking assembly to adapt to the positioning requirements of valve bodies of different heights and avoid clamping instability caused by height deviation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the overall structure in the embodiments of this application.

[0024] Figure 2 This is a structural schematic diagram illustrating the main positioning mechanism in the embodiments of this application.

[0025] Figure 3 This is an exploded view of the main positioning mechanism in the embodiments of this application.

[0026] Figure 4 This is a cross-sectional schematic diagram used to illustrate the vertical adjustment block in the embodiments of this application.

[0027] Figure 5 This is a schematic diagram illustrating the structure of the valve body in the embodiments of this application.

[0028] Figure 6 This is a structural schematic diagram illustrating the secondary positioning mechanism in the embodiments of this application.

[0029] Figure 7 This is an exploded view of the secondary positioning mechanism in the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Base plate; 11. Slide rail; 2. Main positioning mechanism; 21. Main vertical adjustment assembly; 211. Support block; 212. Vertical support rod; 213. Main vertical adjustment component; 2131. First rotating disk; 214. Vertical adjustment block; 2141. Mounting cavity; 2142. Slide groove; 22. Main horizontal adjustment assembly; 221. First slide rod; 222. Connecting rod; 223. Positioning plate; 224. Horizontal adjustment component; 2241. Second rotating disk; 23. Locking assembly; 231. Locking support rod; 232. Locking plate; 233. Locking component; 2331. Third rotating disk; 3. Secondary positioning mechanism; 31. Secondary vertical adjustment assembly; 311. Support cylinder; 312. Slider; 313. Secondary vertical adjustment rod; 3131. Fixed disk; 32. Secondary horizontal adjustment assembly; 321. Sliding support rod; 3211. Sliding support groove; 322. Secondary slide rod; 33. Secondary positioning component; 331. Fourth rotating disk; 332. Positioning block; 4. Valve body; 41. Mounting plate. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0032] This application discloses a positioning fixture for machining the body of a rotary wear-resistant valve, referring to... Figure 1 The system includes a base plate 1, a main positioning mechanism 2, and a secondary positioning mechanism 3. Both the main positioning mechanism 2 and the secondary positioning mechanism 3 are mounted on the base plate 1, and both the main positioning mechanism 2 and the secondary positioning mechanism 3 position the valve body 4 on the base plate 1. The main positioning mechanism 2 is used to provide the main positioning constraints and bear the main loads during the processing, while the secondary positioning mechanism 3 is used to provide auxiliary positioning to prevent the valve body 4 from shifting or rotating during the processing.

[0033] Reference Figures 1-2 In this embodiment, two sets of main positioning mechanisms 2 are provided and installed on the top wall of the base plate 1. The positions of the two sets of main positioning mechanisms 2 are perpendicular to each other. This embodiment uses one set of main positioning mechanisms 2 as an example for explanation. The main positioning mechanism 2 includes a main vertical adjustment component 21, a main horizontal adjustment component 22, and a locking component 23. The locking component 23 is used to position the valve body 4 on the top wall of the base plate. The main vertical adjustment component 21 is used to adjust the height of the locking component 23 to accommodate valve bodies 4 of different heights. The main horizontal adjustment component 22 is used to adjust the horizontal distance between the locking component 23 and the valve body 4.

[0034] Reference Figures 1-3The main vertical adjustment assembly 21 includes a support block 211, vertical support rods 212, a main vertical adjustment component 213, and a vertical adjustment block 214. The support block 211 is fixedly connected to the top wall of the base plate 1. Two vertical support rods 212 are provided, both vertically fixedly connected to the support block 211. The vertical adjustment block 214 is horizontally arranged, and two first sliding holes are vertically opened on the vertical adjustment block 214. The vertical adjustment block 214 is slidably connected to the vertical support rods 212 through the first sliding holes. In this embodiment, the main vertical adjustment component 213 is the main vertical adjustment screw. The lower end of the main vertical adjustment screw is rotatably connected to the support block 211, and the main vertical adjustment screw is located between the two vertical support rods 212. The vertical adjustment block 214 is provided with a first threaded hole, and the vertical adjustment block 214 is threadedly connected to the main vertical adjustment screw through the first threaded hole. A first rotating disk 2131 is fixedly connected to the upper end of the main vertical adjustment screw.

[0035] Reference Figures 1-3 The main lateral adjustment assembly 22 includes a first slide rod 221, a connecting rod 222, a positioning plate 223, and a lateral adjustment component 224. Two slide grooves 2142 are opened on the side of the vertical adjustment block 214 away from the valve body 4. The two slide grooves 2142 extend in the same direction and are perpendicular to the length direction of the vertical adjustment block 214. An installation cavity 2141 is opened on the side of the vertical adjustment block 214 close to the valve body 4. The slide grooves 2142 communicate with the installation cavity 2141.

[0036] Reference Figures 2-4 Two first slide rods 221 are provided and slidably connected to two slide grooves 2142 respectively. Part of the first slide rod 221 is located within the slide groove 2142 and the mounting cavity 2141, and the other part extends out of the slide groove 2142. The positioning plate 223 is slidably connected to the mounting cavity 2141. Part of the positioning plate 223 is located within the mounting cavity 2141, and the other part extends out of the mounting cavity 2141. Both first slide rods 221 are fixedly connected to the positioning plate 223. The axis of the connecting rod 222 is perpendicular to the axis of the first slide rod 221, and both ends of the connecting rod 222 are fixedly connected to the ends of the two first slide rods 221 away from the vertical adjusting block 214.

[0037] Reference Figures 1-3 In this embodiment, the lateral adjustment component 224 is a lateral adjustment screw. The axis of the lateral adjustment screw is parallel to the axis of the first slide rod 221. One end of the lateral adjustment screw is fixedly connected to the side of the vertical adjustment block 214 away from the valve body 4. The lateral adjustment screw is located between the two first slide rods 221. A second threaded hole is provided on the connecting rod 222. The connecting rod 222 is threadedly connected to the lateral adjustment screw through the second threaded hole. A second rotating disk 2241 is fixedly connected to the end of the lateral adjustment screw away from the vertical adjustment block 214.

[0038] Reference Figures 2-4 The locking assembly 23 includes a locking plate 232 and a locking member 233. The positioning plate 223, extending from the mounting cavity 2141, has two vertically formed second sliding holes, and a third threaded hole is vertically formed between the two second sliding holes. The locking plate 232 is located below the positioning plate 223. Two locking support rods 231 are fixedly connected to the top wall of the locking plate 232, and the locking plate 232 is slidably connected to the positioning plate 223 via the locking support rods 231. In this embodiment, the locking member 233 is a locking screw. The lower end of the locking screw is rotatably connected to the top wall of the locking plate 232, the positioning plate 223 is threadedly connected to the locking screw, and a third rotating disk 2331 is fixedly connected to the upper end of the locking screw.

[0039] Reference Figure 1 and Figure 5 The valve body 4 includes a mounting plate 41, which is fixedly connected to the valve body 4. The main positioning mechanism 2 and the secondary positioning mechanism 3 position the valve body 4 on the base plate 1 by positioning the mounting plate 41. After the valve body 4 is positioned on the base plate 1, drilling can be performed on the mounting plate 41 of the valve body 4.

[0040] Reference Figures 1-3 If the valve body 4 needs to be positioned using the main positioning mechanism 2, first place the valve body 4 on the base plate 1 and place the mounting plate 41 on top. Drive the locking screw to rotate using the third rotating disk 2331, causing the locking plate 232 to move downwards until the vertical distance between the locking plate 232 and the positioning plate 223 is greater than the thickness of the mounting plate 41. Then, drive the main vertical adjusting screw to rotate using the first rotating disk 2131, causing the vertical adjusting block 214 to move upwards along the axis of the main vertical adjusting screw until the vertical adjusting block 214 is higher than the mounting plate 41 of the valve body 4. Subsequently, drive the horizontal adjusting screw to rotate using the second rotating disk 2241, causing the connecting rod 222 to move towards the valve body 4 along the axis of the horizontal adjusting screw. The connecting rod 222, through the first sliding rod 221 and the positioning plate 223, drives the locking assembly 23 to move towards the valve body 4 until the positioning plate 223 and the locking plate 232 are respectively located above and below the mounting plate 41 of the valve body 4. Subsequently, rotating the first rotating disk 2131 drives the vertical adjusting block 214 to move downwards via the main vertical adjusting screw until the positioning plate 223 presses against the mounting plate 41 on the valve body 4. Then, the third rotating disk 2331 drives the locking screw to rotate, causing the locking plate to move upwards, thereby locking the mounting plate 41 between the locking plate 232 and the positioning plate 223.

[0041] Reference Figure 1 and Figure 6Two slide rails 11 are fixedly connected to the top wall of the base plate 1. The two slide rails 11 are respectively set at opposite positions of two support blocks 211, and the long axis of each slide rail 11 is parallel to the long axis of the opposite support block 211. Two sets of secondary positioning mechanisms 3 are provided, and the two sets of secondary positioning mechanisms 3 are slidably connected to the two slide rails 11 respectively. This embodiment uses one set of secondary positioning mechanisms 3 as an example for description. The secondary positioning mechanism 3 includes a secondary vertical adjustment component 31, a secondary horizontal adjustment component 32, and a secondary positioning component 33. The secondary horizontal adjustment component 32 is installed on the secondary vertical adjustment component 31, and the secondary positioning component 33 is installed on the secondary horizontal adjustment component 32. The secondary positioning component 33 is used to position the valve body 4, the secondary vertical adjustment component 31 is used to adjust the height of the secondary positioning component 33, and the secondary horizontal adjustment component 32 is used to adjust the horizontal distance between the secondary positioning component 33 and the valve body 4.

[0042] Reference Figures 6-7 The secondary vertical adjustment assembly 31 includes a support cylinder 311, a slider 312, and a secondary vertical adjustment rod 313. The slider 312 is slidably connected to the slide rail 11. The support cylinder 311 is vertically fixedly connected to the upper end of the slider 312. The upper end of the support cylinder 311 has a fourth threaded hole along the axis. The secondary vertical adjustment rod 313 has an external thread on part of its side wall. The secondary vertical adjustment rod 313 is threadedly connected to the support cylinder 311. The upper end of the secondary vertical adjustment rod 313 is fixedly connected to two fixed discs 3131, and there is a certain distance between the two fixed discs 3131.

[0043] Reference Figures 6-7 The secondary lateral adjustment component 32 includes a sliding support rod 321 and a second slide rod 322. One end of the sliding support rod 321 is rotatably connected to the secondary vertical adjustment rod 313 between two fixed disks 3131, and the other end of the sliding support rod 321 has a sliding support groove 3211 along its long axis. One end of the second slide rod 322 is slidably connected to the sliding support rod 321. In this embodiment, the secondary positioning component 33 is a secondary positioning screw. The other end of the second slide rod 322 has a fifth threaded hole vertically opened. The secondary positioning screw is vertically threaded onto the second slide rod 322. The upper end of the secondary positioning screw is fixedly connected to a fourth rotating disk 331, and the lower end of the secondary positioning screw is rotatably connected to a positioning block 332.

[0044] Reference Figures 6-7 If the valve body 4 needs to be positioned by the secondary positioning mechanism 3, first move the secondary positioning screw to the top of the valve body 4 by rotating the secondary vertical adjustment rod 313, then rotate the sliding support rod 321 to a suitable angle, and then drag the second slide rod 322 to make the secondary positioning screw be in a suitable position above the valve body 4. Then drive the secondary positioning screw to move downward by rotating the fourth rotating disk 331, thereby positioning the valve body 4 on the base plate 1.

[0045] The implementation principle of the positioning fixture for machining a rotary wear-resistant valve body according to an embodiment of this application is as follows: First, the valve body 4 is placed on the base plate 1 with the mounting plate 41 facing upwards. Then, the main vertical adjusting screw is rotated to drive the vertical adjusting block 214 to rise above the mounting plate 41. Then, the horizontal adjusting screw is rotated to push the connecting rod 222, causing the first sliding rod 221 and the positioning plate 223 to move horizontally, so that the positioning plate 223 and the locking plate 232 are respectively located at appropriate positions above and below the mounting plate 41. Then, the vertical adjusting block 214 is lowered by the main vertical adjusting screw, so that the positioning plate 223 presses against the upper surface of the mounting plate 41, thereby positioning the valve body 4 on the base plate 1. Then, the locking plate 232 is moved upwards by rotating the locking screw, thereby locking the locking plate 232 onto the positioning plate. The secondary positioning mechanism 3 is slid along the slide rail 11 to one side of the valve body 4. Then, the height is adjusted by rotating the secondary vertical adjustment rod 313. The horizontal position is then finely adjusted by moving the sliding support rod 321 and the second slide rod 322. Then, the secondary positioning screw is rotated to drive the positioning block 332 to press down the mounting plate 41 of the valve body 4. Finally, drilling is performed on the mounting plate 41 of the valve body 4.

[0046] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning tool for processing a valve body of a rotary wear valve, characterized in that: It includes a base plate (1), a main positioning mechanism (2) and a secondary positioning mechanism (3), both of which are mounted on the base plate (1) and are used to position the valve body (4). The main positioning mechanism (2) includes a main vertical adjustment component (21), a main horizontal adjustment component (22) and a locking component (23). The locking component (23) is mounted on the main horizontal adjustment component (22), and the main horizontal adjustment component (22) is mounted on the main vertical adjustment component (21). The secondary positioning mechanism (3) includes a secondary vertical adjustment component (31), a secondary horizontal adjustment component (32), and a secondary positioning component (33). The secondary positioning component (33) is mounted on the secondary horizontal adjustment component (32), and the secondary horizontal adjustment component (32) is mounted on the secondary vertical adjustment component (31).

2. The positioning fixture for machining a rotary wear-resistant valve body according to claim 1, characterized in that: The main vertical adjustment assembly (21) includes a support block (211), a vertical support rod (212), a main vertical adjustment component (213), and a vertical adjustment block (214); the support block (211) is connected to the base plate (1), the vertical support rod (212) is connected to the support block (211), the vertical adjustment block (214) is slidably connected to the vertical support rod (212), the end of the main vertical adjustment component (213) is connected to the support block (211), and the vertical adjustment block (214) is also connected to the main vertical adjustment component (213); the main vertical adjustment component (213) is used to adjust the height of the vertical adjustment block (214).

3. The positioning fixture for machining a rotary wear-resistant valve body according to claim 2, characterized in that: The main lateral adjustment assembly (22) includes a first slide rod (221), a connecting rod (222), a positioning plate (223), and a lateral adjustment component (224). The first slide rod (221) is slidably connected to the vertical adjustment block (214). The positioning plate (223) is connected to one end of the first slide rod (221) near the valve body (4). The positioning plate (223) is also slidably connected to the vertical adjustment block (214). The connecting rod (222) is connected to the end of the first slide rod (221) away from the valve body (4); the end of the horizontal adjusting member (224) is connected to the vertical adjusting block (214), and the connecting rod (222) is also connected to the horizontal adjusting member (224); the horizontal adjusting member (224) is used to adjust the horizontal distance between the positioning plate (223) and the valve body (4); the positioning plate (223) is used to position the valve body (4) on the base plate (1).

4. The positioning fixture for machining a rotary wear-resistant valve body according to claim 3, characterized in that: The locking assembly (23) is mounted on the positioning plate (223). The locking assembly (23) includes a locking plate (232) and a locking member (233). The locking plate (232) is slidably connected to the positioning plate (223). The end of the locking member (233) is connected to the locking plate (232). The locking member (233) is also threadedly connected to the positioning plate (223). The locking member (233) is used to adjust the vertical distance between the locking plate (232) and the positioning plate (223). The locking plate (232) is used to lock the valve body (4) onto the positioning plate (223).

5. The positioning fixture for machining a rotary wear-resistant valve body according to claim 1, characterized in that: The base plate (1) is connected to a slide rail (11). The secondary vertical adjustment component (31) includes a support cylinder (311), a slider (312), and a secondary vertical adjustment rod (313). The slider (312) is slidably connected to the slide rail (11). The support cylinder (311) is connected to the slider (312). The secondary vertical adjustment rod (313) is threadedly connected to the support cylinder (311). The secondary horizontal adjustment component (32) is connected to the secondary vertical adjustment rod (313). The secondary vertical adjustment rod (313) is used to adjust the height of the secondary horizontal adjustment component (32).

6. The positioning fixture for machining a rotary wear-resistant valve body according to claim 5, characterized in that: The secondary lateral adjustment assembly (32) includes a sliding support rod (321) and a second slide rod (322). The sliding support rod (321) is connected to the secondary vertical adjustment rod (313), and the second slide rod (322) is connected to the sliding support rod (321). The secondary positioning member (33) is connected to the second slide rod (322). The secondary lateral adjustment assembly (32) is used to adjust the horizontal distance between the secondary positioning member (33) and the valve body (4).

7. The positioning fixture for machining a rotary wear-resistant valve body according to claim 6, characterized in that: The secondary positioning component (33) is a secondary positioning screw, which is threaded onto the second slide rod (322). The secondary positioning screw is used to position the valve body (4) on the base plate (1).

8. The positioning fixture for machining a rotary wear-resistant valve body according to claim 7, characterized in that: The lower end of the secondary positioning screw is rotatably connected to a positioning block (332).

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