A machining process for a stop valve

Abstract

The application provides a stop valve machining process and relates to the technical field of machining, which comprises a machining device body, an adjusting mechanism, a sensor and an alarm.The adjusting mechanism comprises a mounting seat, a mounting hole, a support, a threaded hole and a fixing screw rod.The sensor captures the position of a cutter in real time.When the sensor detects that the position of the cutter exceeds an overtravel threshold, a high-level signal A is output.When the sensor detects that the position of the cutter does not reach a position threshold, a low-level pulse signal B is output.The signal analysis unit in the alarm controls the sound-emitting module and the light-emitting module to emit different mode alarm signals according to the received signal A or signal B.The linkage mechanism can respond quickly when an abnormal situation occurs, and clear alarm signals can timely remind workers, which can effectively avoid excessive milling or incomplete machining caused by insufficient manual operation precision, reduce the waste rate, improve the machining qualification rate, reduce the waste of raw materials and production cost, improve the production efficiency, and guarantee the production progress of the stop valve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical processing, more specifically, particularly relates to a stop valve machining process. BACKGROUND

[0002] The stop valve machining device is a general term for the equipment and auxiliary system for machining the key components (such as valve body, valve cover, valve flap, valve stem, flange, etc.) of the stop valve. Its core function is to machine the rough parts such as castings and forgings into finished parts that meet the design accuracy (dimensional tolerance, geometric and position tolerance, surface quality, etc.) to ensure the sealing performance, operational flexibility and service life of the stop valve. One of the vertical milling devices has the following structure:

[0003] 1. Spindle box: vertically downward, can install end milling cutter, end milling cutter, etc. Through the shaft sleeve + slide key structure to realize axial movement;

[0004] 2. Workbench: the main workbench is horizontally placed and used for fixing the workpieces such as valve body and valve cover. It is usually equipped with T-shaped groove or clamp interface, supports longitudinal and transverse movement, and the middle slide seat drives the workbench to move transversely;

[0005] 3. Operating hand wheel: the main shaft feed hand wheel controls the axial movement of the main shaft;

[0006] 4. Transmission and feeding system: the main transmission realizes multi-stage speed change, and the feeding transmission cooperates with the manual crank or motor to realize precise feeding.

[0007] In the actual machining process, the following problems may occur:

[0008] 1. The tool will inevitably be worn out during long-term use. Due to tool wear, the key components such as valve body, valve cover and valve flap machined in the stop valve machining process cannot meet the dimensional tolerance required by the design, and cannot meet the performance requirements of the stop valve under actual working conditions;

[0009] 2. When the operator controls the axial movement of the main shaft by the operating hand wheel, the spindle box realizes axial movement through the shaft sleeve and slide key structure. The timeliness and accuracy of this structure under manual control are insufficient, and the feeding accuracy of the transmission and feeding system under manual operation mode is greatly affected by the operator's operation experience, physical condition and attention concentration degree. During the process of rotating the hand wheel, the operator cannot accurately control the rotation amount of the hand wheel, and thus cannot accurately control the axial movement distance of the main shaft, resulting in deviation between the actual distance and the expected distance of the axial movement of the main shaft, and finally causing over-milling. SUMMARY

[0010] In order to solve the above technical problems, the present application provides a stop valve machining process to solve the above problems.

[0011] A stop valve machining process, which is characterized in that:

[0012] S1: selecting appropriate metal materials, and cutting into corresponding size round steel or forgings according to valve specifications;

[0013] S2: large stop valves are usually cast into shape, and small stop valves are usually forged. The casting process includes melting, pouring, cooling and sand cleaning. The forging needs to heat the material and then form through the mold to enhance the density and mechanical properties of the material;

[0014] S3: using vertical milling equipment to preliminarily turn the formed valve body, valve clapper and valve stem parts to remove the excess material on the surface and achieve the shape and size requirements;

[0015] S4: precise turning, milling and grinding are performed by numerical control machine tools to ensure that each part meets the accurate size and surface finish requirements of the design drawing;

[0016] S5: the sealing surface of the valve seat and the valve clapper needs to be ground or laser processed to ensure reliable sealing performance and no leakage.

[0017] Preferably, the vertical milling equipment stop valve machining device in S2 includes a machining device body, an external sensor for detecting the position of the cutter is arranged on the outside of the machining device body, a double threshold comparison module is integrated inside the sensor, the double threshold comparison module presets an overtravel threshold and a to-position threshold, a high-level signal A is output when the sensor detects that the position of the cutter exceeds the overtravel threshold, and a low-level pulse signal B is output when the sensor detects that the position of the cutter does not reach the to-position threshold, an adjusting mechanism for adjusting the position of the sensor is arranged on the outside of the machining device body;

[0018] The adjusting mechanism includes a mounting seat, a mounting hole, a bracket, screw holes and fixed screws, the mounting seat is fixedly installed on the outside of the machining device body, the mounting hole is opened on the outside of the mounting seat, the bracket is slidably connected at one end to the mounting hole, the sensor is located on the upper surface of the bracket, there are two screw holes, the two screw holes are respectively opened on the outside of the bracket, the two screw holes are communicated with the inside of the mounting hole, and there are two fixed screws, the two fixed screws are respectively screwed into the inside of the two screw holes and are used to fix the position of the bracket;

[0019] The upper surface of the bracket is fixedly installed with an alarm, the alarm is electrically connected with the sensor, the alarm includes a signal analysis unit, a sound emitting module and a light emitting module, the signal analysis unit controls the sound emitting module and the light emitting module to emit different mode alarm signals according to the received signal A or signal B.

[0020] Preferably, the upper surface of the support is provided with a protective cover for protecting the sensor and the alarm, both ends of the protective cover are provided with a fixing assembly for fixing the protective cover, each fixing assembly comprises a threaded rod and a nut, the threaded rod is fixedly installed at the outer portion of the support, the nut is threadedly connected to the outer portion of the threaded rod, and the protective cover is slidably connected to the outer portions of the two threaded rods at both ends, the protective cover is installed on the outer portion of the support through the threaded rod and the nut, so as to provide protection for the sensor and the alarm, block the cutting iron filings and cutting fluid from splashing onto the surface of the sensor and the alarm, reduce the false alarm rate of the sensor, and prolong the service life of the sensor and the alarm.

[0021] Preferably, a measuring scale is fixedly installed on the outer side of the support, and the measuring scale is slidably connected to the inner portion of the mounting hole, so that the operator can intuitively read the displacement of the support through the measuring scale, and quickly position the sensor to the target detection position.

[0022] Preferably, the outer portion of the support is provided with a limiting assembly for limiting the rotation of the two fixing screws, the limiting assembly comprises an insertion plate one and an insertion plate two, the outer portion of each fixing screw is provided with a connecting groove, the insertion plate one and the insertion plate two are respectively clamped in the inner portions of the two connecting grooves, the outer portion of the insertion plate one is provided with a limiting groove, the end portion of the insertion plate two is clamped in the inner portion of the limiting groove, the outer portion of the insertion plate two is provided with a limiting elastic sheet for limiting the movement of the insertion plate two, the outer portion of the insertion plate two is provided with a deformation groove, one end of the limiting elastic sheet is fixedly connected to the inner portion of the deformation groove, and the other end extends outward, the connecting between the insertion plate one and the insertion plate two is used to limit the rotation freedom degree of the fixing screw, so as to avoid the loosening of the fixing screw due to machining vibration, and further avoid the hidden danger of displacement of the support.

[0023] Preferably, two gaskets are placed in the inner portion of the mounting hole, the support is provided with a guide hole on one side corresponding to each gasket, and a guide plate is slidably connected to the inner portion of each guide hole and fixedly installed at the outer portion of the gasket.

[0024] Preferably, a cable rack for managing cables is fixedly installed on one side of the support close to the sensor, and a protective pad is fixedly installed on the inner side of the cable rack.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] In the application, the sensor captures the tool position in real time, realizes digital monitoring of the milling position, the adjusting mechanism supports the sensor to slide along the mounting hole, and the bracket is locked through the connection between the fixing screw and the screw hole. The position of the sensor is adjusted according to different processed positions, the detection requirements of the workpiece specifications are adapted, the universality of the device is improved, the alarm and the sensor are linked, a high-level signal A is output when the sensor detects that the tool position exceeds the overtravel threshold, a low-level pulse signal B is output when the sensor detects that the tool position does not reach the position threshold, the signal analysis unit in the alarm controls the sound emitting module and the light emitting module to output different mode alarm signals according to the received signal A or signal B. The linkage mechanism can quickly respond when an abnormal situation occurs, and timely remind the staff with clear alarm signals, which can effectively avoid the over-milling or under-milling caused by insufficient manual operation precision, reduce the scrap rate, improve the processing qualification rate, reduce the waste of raw materials and production cost, improve the production efficiency, and ensure the production progress of the stop valve.

[0027] In the application, the protective cover is installed outside the bracket through a threaded rod and a nut, can be adjusted with the bracket to adjust the protection range, adapt to the dynamic position change of the sensor, and provide protection for the sensor and the alarm. The cutting chips and cutting fluid are prevented from splashing to the surface of the sensor and the alarm, the false alarm rate of the sensor is reduced, and the service life of the sensor and the alarm is prolonged.

[0028] In the application, the operator can directly read the bracket displacement amount through the measuring ruler, quickly position the sensor to the target detection position, shorten the model change adjustment time, and when an abnormality occurs during processing, the displacement data recorded by the measuring ruler can be used to check whether the sensor position deviates from the theoretical value in reverse, to assist fault diagnosis.

[0029] In the application, the plug-in plate one and the plug-in plate two are clamped in the inside of the fixed screw connecting slot, and the rotation freedom of the fixed screw is limited by the connection between the plug-in plate one and the plug-in plate two. When the plug-in plate two is inserted into the inside of the corresponding connecting slot through the limiting slot, the part of the limiting spring plate extending outward is pressed by the inner wall of the limiting slot and moves into the deformation slot. When the limiting spring plate passes through the limiting slot, the limiting spring plate resets to limit the movement of the plug-in plate two, avoiding the disconnection of the plug-in plate two and the limiting slot, and further avoiding the loosening of the fixed screw caused by processing vibration, thereby avoiding the hidden danger of bracket displacement and improving the position stability of the bracket. At the same time, the measuring effect of the sensor is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the application;

[0031] Figure 2 is a schematic diagram of the overall front view structure of the application;

[0032] Figure 3 is a schematic diagram of the overall side view structure of the application;

[0033] Figure 4 is the schematic diagram of the support structure in the present application Figure 1

[0034] Figure 5 is the schematic diagram of the mounting seat in the present application Figure 4

[0035] Figure 6 is the schematic diagram of the enlarged structure at A in the present application Figure 1

[0036] Figure 7 is the schematic diagram of the enlarged structure at B in the present application Figure 1

[0037] In the figure, the corresponding relationship between the component names and the figure numbers is as follows: 1, machining device body; 2, sensor; 3, mounting seat; 4, mounting hole; 5, support; 6, screw hole; 7, fixed screw; 8, alarm; 9, protective cover; 10, threaded rod; 11, nut; 12, measuring scale; 13, plugboard one; 14, plugboard two; 15, connecting groove; 16, limiting groove; 17, limiting elastic sheet; 18, deformation groove; 19, gasket; 20, cable rack; 21, protective pad; 22, guide hole; 23, guide plate. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0039] Please refer to Figure 1 - Figure 7 The present application provides a stop valve machining process, which provides a stop valve machining process to solve the above problems.

[0040] A stop valve machining process, which is:

[0041] S1: select appropriate metal materials, and cut the round steel or forged piece into corresponding size according to the valve specification.

[0042] S2: large stop valves are usually cast, and small stop valves are usually forged. The casting process includes melting, pouring, cooling and sand cleaning. The forging needs to heat the material and then form through the mold to enhance the density and mechanical properties of the material.

[0043] S3: use vertical milling equipment to preliminarily turn the formed valve body, valve clapper and valve rod parts to remove the excess material on the surface and achieve the shape and size requirements.

[0044] ​​​​S4: Precision turning, milling and grinding are carried out by numerical control machine tools to ensure that each part meets the accuracy size and surface finish requirements of the design drawing.

[0045] S5: The sealing surface of the valve seat and the valve disc needs to be processed by grinding or laser processing to ensure reliable sealing performance and no leakage.

[0046] The vertical milling equipment cutoff valve machining device in S2 includes a machining device body 1, an external sensor 2 for detecting the position of the cutter is arranged on the machining device body 1, and an adjusting mechanism for adjusting the position of the sensor 2 is arranged on the external of the machining device body 1.

[0047] The adjusting mechanism includes a mounting seat 3, a mounting hole 4, a bracket 5, a screw hole 6, and a fixing screw 7. The mounting seat 3 is fixedly installed on the external of the machining device body 1, the mounting hole 4 is opened on the external of the mounting seat 3, one end of the bracket 5 is slidably connected to the mounting hole 4, the sensor 2 is located on the upper surface of the bracket 5, the sensor 2 can be fixed on the upper surface of the bracket 5 by glue or screws according to needs, the screw hole 6 has two, the two screw holes 6 are respectively opened on the external of the bracket 5, the two screw holes 6 are communicated with the internal of the mounting hole 4, and the fixing screw 7 has two, the two fixing screws 7 are respectively threadedly connected to the internal of the two screw holes 6 and are used for fixing

[0048] the position of the bracket 5.

[0049] The upper surface of the bracket 5 is fixedly installed with an alarm 8, the alarm 8 can be fixed on the upper surface of the bracket 5 by glue or screws according to needs, and the alarm 8 is electrically connected with the sensor 2.

[0050] The sensor 2 is internally integrated with a double-threshold comparison module, the double-threshold comparison module is preset with an overtravel threshold and a to-position threshold, a high-level signal A is output when the sensor 2 detects that the position of the cutter exceeds the overtravel threshold, a low-level pulse signal B is output when the sensor 2 detects that the position of the cutter does not reach the to-position threshold, the alarm 8 includes a signal analysis unit, a sound emitting module and a light emitting module, the signal analysis unit controls the sound emitting module and the light emitting module to emit different mode alarm signals according to the received signal A or signal B.

[0051] The upper surface of the support 5 is provided with a protective cover 9 for protecting the sensor 2 and the alarm 8, the protective cover 9 is made of transparent material, both ends of the protective cover 9 are provided with a fixing assembly for fixing the protective cover 9, each fixing assembly comprises a threaded rod 10 and a nut 11, the threaded rod 10 is fixedly installed at the outside of the support 5, the nut 11 is threadedly connected at the outside of the threaded rod 10, both ends of the protective cover 9 are slidably connected at the outside of the two threaded rods 10, the protective cover 9 is installed at the outside of the support 5 through the threaded rod 10 and the nut 11, can be adjusted with the support 5 to adjust the protection range, adapt to the dynamic position change of the sensor 2, provide protection for the sensor 2 and the alarm 8, block the cutting iron filings and cutting fluid from splashing to the surface of the sensor 2 and the alarm 8.

[0052] The outside of the support 5 is fixedly installed with a measuring scale 12, the measuring scale 12 is slidably connected in the inside of the mounting hole 4, the operator can directly read the displacement amount of the support 5 through the measuring scale 12, and quickly position the sensor 2 to the target detection position.

[0053] The outside of the support 5 is provided with a limiting assembly for limiting the rotation of the two fixed screws 7, the limiting assembly comprises an insertion plate one 13 and an insertion plate two 14, the insertion plate one 13 and the insertion plate two 14 are both T-shaped, a connecting groove 15 is formed in the outside of each fixed screw 7, the insertion plate one 13 and the insertion plate two 14 are respectively clamped in the inside of the two connecting grooves 15, a limiting groove 16 is formed in the outside of the insertion plate one 13, the end of the insertion plate two 14 is clamped in the inside of the limiting groove 16, the insertion plate one 13 and the insertion plate two 14 are clamped in the connecting groove 15 of the fixed screw 7, and the rotation freedom of the fixed screw 7 is limited by the connection between the insertion plate one 13 and the insertion plate two 14, so as to avoid loosening of the fixed screw 7 due to machining vibration, and further avoid the hidden danger of displacement of the support 5.

[0054] The outside of the insertion plate two 14 is provided with a limiting elastic sheet 17 for limiting the movement of the insertion plate two 14, a deformation groove 18 is formed in the outside of the insertion plate two 14, one end of the limiting elastic sheet 17 is fixedly connected in the inside of the deformation groove 18, and the other end extends outward, when the insertion plate two 14 is inserted into the corresponding connecting groove 15 through the limiting groove 16, the outwardly extending part of the limiting elastic sheet 17 is pressed by the inner wall of the limiting groove 16 and moves into the inside of the deformation groove 18, when the limiting elastic sheet 17 passes through the limiting groove 16, the limiting elastic sheet 17 resets to limit the movement of the insertion plate two 14, and avoids disconnection of the insertion plate two 14 and the limiting groove 16.

[0055] Two spacers 19 are placed in the inside of the mounting hole 4, so as to reduce the stress generated by the direct extrusion of the fixed screw 7 on the support 5, one side of the support 5 corresponding to each spacer 19 is provided with a guide hole 22, a guide plate 23 is slidably connected in the inside of each guide hole 22, the guide plate 23 is fixedly installed at the outside of the spacer 19, and the direction of the movement of the spacer 19 is guided.

[0056] The one side of the support 5 close to the sensor 2 is fixedly installed with a cable rack 20 for managing cables, and the inner side of the cable rack 20 is fixedly installed with a protective pad 21 made of silicone rubber material, and the cables connected with the sensor 2 and the alarm 8 and other devices to the external power supply are located on the inner side of the cable rack 20, and the protective pad 21 avoids the friction between the cables and the inner side of the cable rack 20.

[0057] Working principle:

[0058] First step: The sensor 2 captures the tool position in real time, realizes the digital monitoring of the milling position, the adjusting mechanism supports the sensor 2 to slide along the mounting hole 4, and at the same time, the support 5 is locked through the connection between the fixed screw 7 and the screw hole 6, the position of the sensor 2 is adjusted according to the different processed positions, the detection requirements of the workpiece specifications are adapted, the universality of the device is improved, the alarm 8 is linked with the sensor 2, and since the sensor 2 is internally integrated with a double-threshold comparison module, when the sensor 2 detects that the tool position exceeds the overtravel threshold, a high-level signal A is output, and when the sensor 2 detects that the tool position does not reach the in-place threshold, a low-level pulse signal B is output, the alarm 8 includes a signal analysis unit, a sound emitting module and a light emitting module, the signal analysis unit controls the sound emitting module and the light emitting module to emit different mode alarm signals according to the received signal A or signal B, this linkage mechanism can quickly respond when an abnormal situation occurs, and clearly reminds the staff in time with the alarm signal, which can effectively avoid the over-milling or incomplete processing caused by insufficient manual operation precision, reduce the scrap rate, improve the processing qualification rate, reduce the waste of raw materials and production cost, improve the production efficiency, and ensure the production progress of the stop valve;

[0059] Second step: When the height of the sensor 2 needs to be adjusted, press the limiting spring 17 to make the outwardly extending part of the limiting spring 17 enter the inside of the deformation groove 18, at this time, pull the plug plate two 14 to disconnect the connection between the limiting groove 16 and the connecting groove 15, at this time, pull the plug plate one 13 to disconnect the connecting groove 15 of the plug plate one 13, at this time, rotate the fixed screw 7 to make the fixed screw 7 away from the gasket 19, at this time, the support 5 can be moved, when the position of the sensor 2 is adjusted, rotate the fixed screw 7 in the opposite direction to make the fixed screw 7 push the gasket 19 to tightly adhere to the outside of the support 5, so as to fix the support 5, then insert the plug plate one 13 into the connecting groove 15, and then insert the plug plate two 14 into the corresponding connecting groove 15 through the limiting groove 16, at this time, the two fixed screws 7 are limited and cannot be rotated, which avoids the loosening of the fixed screw 7 caused by processing vibration, and further avoids the hidden danger of displacement of the support 5;

[0060] Third, when the stop valve part is processed, in order to protect the sensor 2, at this time, the nut 11 is rotated to disconnect the nut 11 and the threaded rod 10, at this time, the protective cover 9 is pulled up to disconnect the protective cover 9 and the threaded rod 10, at this time, the protective cover 9 is disassembled, then the new protective cover 9 is slidably connected at both ends of the two threaded rods 10, and then the nut 11 is threadedly connected to the outside of the threaded rod 10, so as to fix the new protective cover 9, the protective cover 9 can move with the bracket 5 to adjust the protection range, adapt to the dynamic position change of the sensor 2, protect the sensor 2 and the alarm 8, block the cutting iron filings and cutting fluid from splashing to the surface of the sensor 2 and the alarm 8, reduce the false alarm rate of the sensor 2, and prolong the service life of the sensor 2 and the alarm 8.

[0061] Embodiments of the application are presented for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the precise forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A machining process for a gate valve, characterized in that, The machining process for this shut-off valve is as follows: S1: Select suitable metal materials and cut them into round steel or forgings of the appropriate size according to the valve specifications; S2: Large gate valves are cast, while small gate valves are forged. The casting process includes melting, pouring, cooling and sand removal, while forging requires heating the material and forming it through a mold to enhance the material's density and mechanical properties. S3: Use vertical milling equipment to perform preliminary turning on the formed valve body, valve disc, and valve stem components to remove excess material from the surface and achieve the required shape and size. S4: Precision turning, milling, and grinding are performed using CNC machine tools to ensure that each component meets the precise dimensions and surface finish requirements of the design drawings; S5: The sealing surfaces of the valve seat and valve disc must be ground or laser-processed to ensure reliable sealing performance and no leakage; The vertical milling equipment stop valve machining device in S3 includes a machining device body (1). The machining device body (1) is equipped with a sensor (2) for detecting the tool position. The sensor (2) integrates a dual threshold comparison module. The dual threshold comparison module presets an overtravel threshold and a position threshold. When the sensor (2) detects that the tool position exceeds the overtravel threshold, it outputs a high-level signal A. When the sensor (2) detects that the tool position has not reached the position threshold, it outputs a low-level pulse signal B. The machining device body (1) is equipped with an adjustment mechanism for adjusting the position of the sensor (2). The adjustment mechanism includes a mounting base (3), a mounting hole (4), a bracket (5), a screw hole (6), and a fixing screw (7). The mounting base (3) is fixedly installed on the outside of the machine body (1) of the machining device. The mounting hole (4) is opened on the outside of the mounting base (3). One end of the bracket (5) is slidably connected to the mounting hole (4). The sensor (2) is located on the upper surface of the bracket (5). There are two screw holes (6). The two screw holes (6) are opened on the outside of the bracket (5) and are connected to the inside of the mounting hole (4). There are two fixing screws (7). The two fixing screws (7) are threadedly connected to the inside of the two screw holes (6) and are used to fix the position of the bracket (5). An alarm (8) is fixedly installed on the upper surface of the bracket (5). The alarm (8) is electrically connected to the sensor (2). The alarm (8) includes a signal analysis unit, a sound generation module and a light emission module. The signal analysis unit controls the sound generation module and the light emission module to emit alarm signals of different modes according to the received signal A or signal B.

2. The machining process for a gate valve as described in claim 1, characterized in that, The upper surface of the bracket (5) is provided with a protective cover (9) for protecting the sensor (2) and the alarm (8).

3. The machining process for a gate valve as described in claim 2, characterized in that, Both ends of the protective cover (9) are provided with fixing components for fixing the protective cover (9), and each fixing component includes a threaded rod (10) and a nut (11). Among them, the end of the threaded rod (10) is fixedly installed on the outside of the bracket (5), the nut (11) is threadedly connected to the outside of the threaded rod (10), and the two ends of the protective cover (9) are slidably connected to the outside of the two threaded rods (10).

4. The machining process for a gate valve as described in claim 3, characterized in that, A measuring ruler (12) is fixedly installed on the outside of the bracket (5), and the measuring ruler (12) is slidably connected to the inside of the mounting hole (4) along with the bracket (5).

5. The machining process for a gate valve as described in claim 4, characterized in that, The bracket (5) is provided with a limiting component for restricting the rotation of the two fixing screws (7). The limiting component includes a first insert plate (13) and a second insert plate (14). Each fixing screw (7) has a connecting groove (15) on its outside. Insert plate one (13) and insert plate two (14) are respectively snapped into the inside of the two connecting grooves (15). Insert plate one (13) has a limiting groove (16) on its outside. The end of insert plate two (14) is snapped into the inside of the limiting groove (16).

6. The machining process for a gate valve as described in claim 5, characterized in that, The outer side of the second insert plate (14) is provided with a limiting spring piece (17) to restrict the movement of the second insert plate (14). The outer side of the second insert plate (14) is provided with a deformation groove (18). One end of the limiting spring piece (17) is fixedly connected to the inside of the deformation groove (18), and the other end extends outward.

7. The machining process for a gate valve as described in claim 6, characterized in that, Two gaskets (19) are placed inside the mounting hole (4); Among them, the bracket (5) has a guide hole (22) on one side corresponding to each pad (19), and a guide plate (23) is slidably connected inside each guide hole (22). The guide plate (23) is fixedly installed on the outside of the pad (19).

8. The machining process for a gate valve as described in claim 7, characterized in that, The bracket (5) has a cable rack (20) for managing cables fixedly installed on the side near the sensor (2).

9. The machining process for a gate valve as described in claim 8, characterized in that, A protective pad (21) is fixedly installed on the inner side of the cable rack (20).

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