High-efficiency grinding tool for sealing surface of valve seat of high-pressure stop valve and machining device of high-efficiency grinding tool

Abstract

The invention provides a high-pressure stop valve seat sealing surface efficient grinding tool and a machining device thereof, and relates to the technical field of valve manufacturing, the high-pressure stop valve seat sealing surface efficient grinding tool comprises a driving rod and a grinding rod, the bottom end of the driving rod is connected with the top end of the grinding rod, the top end of the driving rod is connected with a driving device, and the bottom end of the grinding rod is of a conical structure; and a stop structure is arranged on the conical surface of the bottom end of the grinding rod. The stop mechanism is arranged on the conical surface of the bottom end of the grinding rod, and the sealing surface of the valve seat of the high-pressure stop valve is effectively ground through the stop mechanism by using the grinding abrasive cloth. In this way, the problems that according to existing valve seat sealing face grinding, the efficiency is low, remaining hard grinding sand is difficult to clean, abrasive paper cloth is prone to falling off and falling into a system pipeline, eccentric wear is prone to being caused by untimely cooling and replacement, or even the abrasive cloth falls off, a grinding rod and the sealing face are directly ground, and consequently the sealing face is seriously damaged are effectively solved. And the valve and the grinding rod are scrapped.

Description

Technical Field

[0001] The invention relates to the technical field of valve manufacturing, and in particular to a high-efficiency grinding tool for a sealing surface of a valve seat of a high-pressure stop valve and a processing device thereof. Background Art

[0002] There are many high-pressure stop valves installed in the high-pressure steam-water system of the steam turbine generator set of the thermal power plant. These high-pressure stop valves are responsible for the isolation, drainage, and emptying of the high-pressure steam-water system. Due to the high pressure difference between the inlet and outlet sides and the high working temperature, the operating environment is relatively harsh. The valve core and valve seat are seriously eroded and leaked during long-term operation, threatening the safe operation of the system. For example, if the drain valve of the high-pressure water supply system leaks, the safety treatment measures need to relieve pressure and drain water. If the valve core and valve seat are slightly eroded, the valve core can be turned and the valve seat sealing surface can be ground to resume use. If it is serious, the valve needs to be replaced.

[0003] The previous process for grinding the valve seat sealing surface was to use a grinding rod that matches the geometric dimensions of the valve seat sealing surface, apply abrasive sand on the grinding rod or the valve seat sealing surface for grinding. The efficiency was low and the remaining hard abrasive sand was difficult to clean. Later, self-adhesive sandpaper was attached to the grinding part of the grinding rod and used an electric tool for grinding, which improved the efficiency. However, after friction and heat generation, the viscosity of the self-adhesive sandpaper backing decreased. When the viscosity of the self-adhesive sandpaper backing was less than the grinding resistance between the sandpaper and the valve seat sealing surface, the sandpaper cloth was easy to fall off and fall into the system pipeline. If the cooling and replacement were not timely, it would easily cause eccentric wear or even the sandpaper falling off, and the grinding rod and the sealing surface would be directly ground against each other, causing serious damage to the sealing surface, and the valve and the grinding rod would be scrapped. Therefore, in view of the above situation, it is urgent to develop an efficient grinding tool and processing device for the valve seat sealing surface of a high-pressure stop valve, so as to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides a high-efficiency grinding tool and a processing device for the valve seat sealing surface of a high-pressure stop valve, which are used to solve the technical problems proposed in the above background technology that the existing valve seat sealing surface grinding adopts a grinding rod that matches the geometric dimensions of the valve seat sealing surface, and abrasive sand is applied on the grinding rod or the valve seat sealing surface for grinding, or self-adhesive sandpaper is attached to the grinding part of the grinding rod and ground with an electric tool, which is not only inefficient and difficult to clean the remaining hard abrasive sand, but also the sandpaper cloth is easy to fall off and drop into the system pipeline, and untimely cooling and replacement are easy to cause eccentric wear or even the sandpaper falls off and the grinding rod directly grinds the sealing surface, causing serious damage to the sealing surface, and the valve and the grinding rod are scrapped.

[0005] In order to solve the above technical problems, the present invention discloses a high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat, comprising: The driving rod is composed of a driving rod and a grinding rod, wherein the bottom end of the driving rod is connected to the top end of the grinding rod, the top end of the driving rod is connected to a driving device, the bottom end of the grinding rod is a conical structure, and a stopping structure is arranged on the conical surface of the bottom end of the grinding rod.

[0006] Preferably, the conical surface at the bottom end of the grinding rod is made of brass, and the conical surface at the bottom end of the grinding rod is provided with a stop structure for fixing the grinding cloth.

[0007] Preferably, the stopping structure is a stopping gap opened on the surface of the conical structure, the width of the stopping gap is 1.5 mm, and is used to embed the bent end of the abrasive cloth. The bent end of the abrasive cloth is embedded in the stopping gap to fix the abrasive cloth.

[0008] Preferably, the driving rod is made of No. 45 steel, and the top end of the driving rod is connected to a driving device, and the driving device is a continuously variable speed electric drill for providing a stable rotational driving force.

[0009] Preferably, the high-efficiency grinding tool for the sealing surface of the valve seat of a high-pressure shut-off valve further includes a sensor device for monitoring the grinding operation status and grinding quality to improve the degree of automation and accuracy of the grinding operation.

[0010] A high-pressure stop valve seat processing device comprises: a support frame, a valve seat fixing mechanism is arranged on the inner wall of the bottom end of the support frame, and a displacement mechanism is arranged on the inner wall of the top end of the support frame.

[0011] Preferably, the valve seat fixing mechanism comprises: a mounting seat, the mounting seat is fixedly mounted on the inner wall of the bottom end of the support frame, and the left end of the inner wall of the mounting seat is rotatably connected to one end of a threaded rod 1, the other end of the threaded rod 1 passes through the mounting seat and is fixedly connected to the turntable, the left and right ends of the threaded rod 1 have opposite threads, the sliding rod is fixedly mounted on the inner wall of the mounting seat at the top end of the threaded rod 1, and the threaded rod 1 is threadedly connected to two sets of fixing components; The fixing assembly includes: a slider 1, the slider 1 is threadedly connected to a threaded rod 1, the top end of the slider 1 is fixedly connected to the bottom end of a short rod 1, the top end of the short rod 1 passes through a mounting seat and is fixedly connected to a clamping block, the short rod 1 is slidably connected to the slide rod left and right, and a return spring is sleeved on the slide rod at one end of the short rod 1 close to the inner wall of the mounting seat.

[0012] Preferably, the displacement mechanism comprises: a second short rod, the top end of the second short rod is fixedly mounted on the inner wall of the support frame, the bottom end of the second short rod is fixedly mounted on the mounting frame, the fixed end of the first driving motor is fixedly mounted on the front end of the mounting frame, and the output end of the first driving motor passes through the inner wall of the mounting frame and is fixedly connected to the second threaded rod, the other end of the second threaded rod is rotatably connected to the inner wall of the rear end of the mounting frame, and the second threaded rod is threadedly slidably connected with a second slider, brackets are fixedly mounted on the bottom ends of both sides of the second slider, racks are slidably connected to the bottom ends of the left and right sides of the bracket, the bottom end of the second slider is connected to the left and right moving components, the bottom end of the rack is connected to the support plate through a number of electric lifting rods, and the bottom end of the support plate is fixedly mounted with a cutting machine.

[0013] Preferably, the cutting machine further comprises: A first temperature sensor is used to detect the temperature of the cutting workpiece at the beginning of cutting; A second temperature sensor is used to detect the temperature of the cutting workpiece during the cutting process; A controller and an alarm, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor and the alarm, and the controller controls the alarm to work based on the first temperature sensor and the second temperature sensor.

[0014] Preferably, the high-pressure stop valve seat processing device comprises the following steps: Step 1: Calculate the thermal conductivity of the workpiece material based on formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor.

[0015] (1); in is the interface heat distribution coefficient between the cutting machine and the workpiece, is the heat flux per unit area per unit time at the shear surface, is the cutting thickness, is the cocut, is the shear angle between the cutting machine and the workpiece, is the cutting speed of the cutting machine, is the cutting shear strain, is the thermal conductivity of the workpiece material, is the detection value of the first temperature sensor, is the detection value of the second temperature sensor; Step 2: Calculate the actual heat generated by the cutting machine teeth on the cutting surface according to the following formula (2): The controller compares the actual heat generated by the cutting machine teeth on the cutting surface When the actual heat output exceeds the preset heat output range, the controller will control the alarm to sound.

[0016] (2); in is the ratio of heat flowing to the workpiece chips, It is the contact surface between the cutting tool and the workpiece on the cutting machine. is the cutting width, is the cutting contact line length, is the friction coefficient between the cutting tool and the workpiece on the cutting machine, is the cross-sectional area of ​​the cutting layer, is a sine, is the cosine, It is the front angle of the cutting tool on the cutting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the installation structure of the grinding tool provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a valve seat processing device provided in an embodiment of the present invention; Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the partially enlarged structure; Figure 4 The embodiment of the present invention provides Figure 2 Schematic diagram of the internal structure of the middle mounting frame looking down.

[0019] Reference numerals: 1. Driving rod; 2. Grinding rod; 3. Grinding cloth; 4. Stop gap; 5. Support frame; 6. Mounting seat; 7. Threaded rod 1; 8. Turntable; 9. Slider 1; 10. Short rod 1; 11. Clamping block; 12. Short rod 2; 13. Mounting frame; 14. Threaded rod 2; 15. Slider 2; 16. Bracket; 17. Rack; 18. Electric lifting rod; 19. Support plate; 20. Cutting machine; 21. Mounting frame; 22. Driving motor 2; 23. Worm; 24. Worm wheel; 25. Driving motor 1; 26. Through hole; 27. Sliding rod; 28. Reset spring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat, such as Figure 1 As shown, it includes: a driving rod 1 and a grinding rod 2, the bottom end of the driving rod 1 is connected to the top end of the grinding rod 2, the top end of the driving rod 1 is connected to the driving device, the bottom end of the grinding rod 2 is a conical structure, and a stopping mechanism is arranged on the conical surface of the bottom end of the grinding rod 2.

[0023] The beneficial effects of the above technical solution are as follows: the present invention provides a stop mechanism on the conical surface at the bottom end of the grinding rod, and the stop mechanism is used to effectively grind the valve seat sealing surface of the high-pressure stop valve by using abrasive cloth. This effectively improves the technical problems raised in the background technology: the existing valve seat sealing surface grinding is not only inefficient and the remaining hard grinding sand is difficult to clean, but also the sandpaper cloth is easy to fall off and fall into the system pipeline, and untimely cooling and replacement may easily cause eccentric wear or even the sandpaper falling off and the grinding rod directly grinding against the sealing surface, causing serious damage to the sealing surface, and the valve and the grinding rod are scrapped.

[0024] Example 2 On the basis of Example 1, Figure 1 As shown, a high-pressure stop valve seat processing device, the conical surface at the bottom end of the grinding rod 2 is made of brass, and the conical surface at the bottom end of the grinding rod 2 is provided with a stop structure for fixing the grinding cloth 3.

[0025] Optionally, the stopping structure is a stopping gap 4 opened on the surface of the conical structure, the width of the stopping gap 4 is 1.5 mm, and is used to embed the bent end of the grinding cloth 3. The bent end of the grinding cloth 3 is embedded in the stopping gap 4 to fix the grinding cloth 3.

[0026] Optionally, the driving rod 1 is made of No. 45 steel, and the top end of the driving rod 1 is connected to a driving device, and the driving device is a continuously variable speed electric drill for providing a stable rotational driving force.

[0027] Optionally, the high-efficiency grinding tool for the sealing surface of the valve seat of a high-pressure shut-off valve further includes a sensor device for monitoring the grinding operation status and grinding quality to improve the degree of automation and accuracy of the grinding operation.

[0028] The working principle and beneficial effects of the above technical solution are as follows: the present invention adopts a continuously variable speed hand drill as a driving tool to drive the driving rod 1 to rotate, and the driving rod 1 rotates to drive the grinding rod 2 to rotate, and a 1.5 mm wide grinding sandpaper is opened on the conical surface of the grinding rod 2 to embed into the stop gap, and when the grinding sandpaper 3 is fitted with the conical part of the grinding head, the stop bent end of the sandpaper is embedded in the gap, and then rotated to fit, so as to prevent the sandpaper from falling off; The driving rod 1 is made of 45 steel, which increases the mechanical strength and eliminates the influence of the rotation instability of the grinding rod caused by the bending deformation of the driving rod during long-term use on the grinding accuracy; the grinding head of the grinding rod 2 is made of brass to prevent the grinding cloth 3 from accidentally falling off and causing damage to the valve seat sealing surface by the grinding head; the present invention eliminates the influence of the rotation instability of the grinding rod caused by the bending deformation of the driving rod during long-term use on the grinding accuracy, eliminates the hidden danger of the grinding cloth falling off, avoids the damage to the valve seat sealing surface caused by the accidental grinding of the grinding head and the valve seat sealing surface, and improves the work efficiency and grinding accuracy.

[0029] Example 3 On the basis of Example 1-2, Figure 2-4 As shown, a high-pressure stop valve seat processing device includes: a support frame 5, a valve seat fixing mechanism is arranged on the inner wall of the bottom end of the support frame 5, and a displacement mechanism is arranged on the inner wall of the top end of the support frame 5.

[0030] Optionally, the valve seat fixing mechanism includes: a mounting seat 6, the mounting seat 6 is fixedly mounted on the inner wall of the bottom end of the support frame 5, and the left end of the inner wall of the mounting seat 6 is rotatably connected to one end of a threaded rod 7, the other end of the threaded rod 7 passes through the mounting seat 6 and is fixedly connected to the turntable 8, the left and right ends of the threaded rod 7 have opposite threads, the sliding rod 27 is fixedly mounted on the inner wall of the mounting seat 6 at the top of the threaded rod 7, and the threaded rod 7 is threadedly connected to two sets of fixed components; The fixing assembly includes: a slider 9, the slider 9 is threadedly connected to the threaded rod 7, the top of the slider 9 is fixedly connected to the bottom of the short rod 10, the top of the short rod 10 passes through the mounting seat 6 and is fixedly connected to the clamping block 11, the short rod 10 is slidably connected to the slide rod 27 left and right, and a return spring 28 is sleeved on the slide rod 27 at one end of the short rod 10 close to the inner wall of the mounting seat 6.

[0031] Optionally, the displacement mechanism includes: a short rod 12, the top of which is fixedly mounted on the inner wall of the support frame 5, the bottom of which is fixedly mounted on the mounting frame 13, the fixed end of a driving motor 25 is fixedly mounted on the front end of the mounting frame 13, and the output end of the driving motor 25 passes through the inner wall of the mounting frame 13 and is fixedly connected to a threaded rod 14, the other end of the threaded rod 14 is rotatably connected to the inner wall of the rear end of the mounting frame 13, and a slider 15 is threadedly slidably connected on the threaded rod 14, brackets 16 are fixedly mounted on the bottom ends of both sides of the slider 15, racks 17 are slidably connected to the bottom ends of the left and right sides of the bracket 16, the bottom end of the slider 15 is connected to the left and right moving components, the bottom end of the rack 17 is connected to a supporting plate 19 through a plurality of electric lifting rods 18, and a cutting machine 20 is fixedly mounted on the bottom end of the supporting plate 19; Optionally, the left-right moving component includes: a mounting frame 21, the top of the mounting frame 21 is fixedly mounted on the bottom of the slider 15, a driving motor 22 is fixedly mounted on the right outer wall of the mounting frame 21, the output end of the driving motor 22 passes through the mounting frame 21 and is fixedly connected to a worm 23, the other end of the worm 23 is rotatably connected to the inner wall of the left end of the mounting frame 21, the worm 23 is meshingly connected to a worm wheel 24, the bottom end of the worm wheel 24 is meshingly connected to a rack 17, and the left and right ends of the rack 17 are slidably connected in through holes 26 provided at the left and right ends of the support frame 5.

[0032] The working principle of the above technical solution is as follows: when the valve seat needs to be processed, the turntable 8 is rotated, and the turntable 8 rotates to drive the threaded rod 7 to rotate accordingly. The threaded rod 7 rotates to drive the slider 9 threadedly connected to it to move on the slide bar 27 accordingly, and the slider 9 moves toward the inside of the mounting seat 6, and then drives the short rod 10 and the clamping block 11 at the top of the short rod 10 to approach each other, so as to effectively clamp and fix the workpiece to be processed, and then start the electric lifting rod 18, and the electric lifting rod 18 moves downward to push the support plate 19, and then start the cutting machine 20, so as to effectively process the workpiece to be processed. When it is necessary to move the cutting machine 20 to the left and right directions, by starting The driving motor 22 drives the worm 23 fixedly connected thereto to rotate, and the rotation of the worm 23 drives the worm wheel 24 meshing therewith to rotate accordingly, and the rotation of the worm wheel 24 drives the rack 17 meshing therewith to move left and right, and the left and right movement of the rack 17 drives the cutting machine 20 at the bottom to move accordingly. When the cutting machine 20 needs to be moved forward and backward, by starting the driving motor 1 25, the driving motor 1 25 rotates and drives the threaded rod 2 14 to rotate accordingly, and the rotation of the threaded rod 14 drives the slider 2 15 meshing therewith to move forward and backward in the mounting frame 13 accordingly, and the mounting frame 13 moves forward and backward, driving the slider 2 15 fixedly connected to the bottom end to move forward and backward accordingly, which is very convenient and practical.

[0033] The beneficial effects of the above technical scheme are as follows: by setting the valve seat fixing mechanism, it is conducive to effectively clamping and fixing workpieces of different sizes to be processed; by setting the reset spring 28, it is conducive to resetting the clamping block 11; by setting the turntable 8, it is conducive to adjusting the threaded rod 7; by setting the electric lifting rod 18, it is conducive to adjusting the upper and lower positions of the cutting machine 20; by setting the cutting machine 20, it is conducive to effectively processing the workpiece to be processed; by setting the worm 23 and the worm wheel 24, it is conducive to the left and right movement of the rack 17 through the forward and reverse driving motor 22, thereby realizing the left and right movement of the cutting machine 20; by setting the driving motor 1 25 and the slider 2 15, it is conducive to the forward and backward movement of the slider 2 15 at the bottom, and further realizes the forward and backward movement of the bottom end bracket 16, which is very convenient and practical.

[0034] Example 4 On the basis of Embodiment 1-2, in the high-pressure stop valve seat processing device, the cutting machine 20 further includes: A first temperature sensor is used to detect the temperature of the cutting workpiece at the beginning of cutting; A second temperature sensor is used to detect the temperature of the cutting workpiece during the cutting process; A controller and an alarm, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor and the alarm, and the controller controls the alarm to work based on the first temperature sensor and the second temperature sensor.

[0035] Optionally, include the following steps: Step 1: Calculate the thermal conductivity of the workpiece material based on formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor.

[0036] (1); in is the interface heat distribution coefficient between the cutting machine 20 and the workpiece (the value range is 0.23-0.58), is the heat flux per unit area per unit time at the shear surface, is the cutting thickness, is the cocut, is the shear angle between the cutting machine 20 and the workpiece, is the cutting speed of the cutting machine 20, is the cutting shear strain, is the thermal conductivity of the workpiece material (the range is 0.32-0.74), is the detection value of the first temperature sensor, is the detection value of the second temperature sensor; Step 2: Calculate the actual heat generated by the cutting machine 20 teeth on the cutting surface according to the following formula (2): The controller compares the actual heat generated by the cutting machine 20 teeth on the cutting surface When the actual heat output exceeds the preset heat output range, the controller will control the alarm to sound.

[0037] (2); in is the ratio of heat flowing to the workpiece chips, is the contact surface between the cutting tool and the workpiece on the cutting machine 20, is the cutting width, is the cutting contact line length, is the friction coefficient between the cutting tool and the workpiece on the cutting machine 20 (the value range is 0.12-0.36), is the cross-sectional area of ​​the cutting layer, is a sine, is the cosine, It is the cutting blade front angle of the cutting machine 20.

[0038] The beneficial effects of the above technical solution are as follows: the controller calculates the thermal conductivity of the workpiece material based on the formula (1), the detection values ​​of the first temperature sensor and the second temperature sensor, and comprehensively considers the interface heat distribution coefficient between the cutting machine 20 and the workpiece, the heat flux density per unit area per unit time at the shearing surface, the cutting thickness, the cosecant, the shear angle between the cutting machine 20 and the workpiece, the cutting speed of the cutting machine 20, the cutting shear strain, and the thermal conductivity of the workpiece material, thereby making the calculation result more accurate and reliable; Then, according to formula (2), the actual heat generated by the teeth of the cutting machine 20 on the cutting surface is calculated by comprehensively considering the proportion of heat flowing to the workpiece chips, the contact surface between the cutting tool on the cutting machine 20 and the workpiece, the cutting width, the cutting contact line length, the friction coefficient between the cutting tool on the cutting machine 20 and the workpiece, the cutting layer cross-sectional area, and the cutting tool rake angle on the cutting machine 20, so as to make the calculation result more accurate and reliable.

[0039] The controller controls the first temperature sensor and the second temperature sensor and controls the alarm. The controller compares the actual heat generated by the cutting machine 20 teeth on the cutting surface with the preset heat generation range. When the actual heat generation is higher than the preset heat generation range, the controller controls the alarm to sound an alarm, thereby reminding the staff to effectively cool down the cutting machine 20 and the workpiece in time, thereby preventing the cutting machine 20 from being damaged, thereby meeting the user's needs for this type of high-pressure shut-off valve seat processing device.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat, characterized in that: include: The invention is composed of a driving rod (1) and a grinding rod (2), wherein the bottom end of the driving rod (1) is connected to the top end of the grinding rod (2), the top end of the driving rod (1) is connected to a driving device, the bottom end of the grinding rod (2) is a conical structure, and a stop structure is arranged on the conical surface of the bottom end of the grinding rod (2).

2. A high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat according to claim 1, characterized in that: The conical surface at the bottom end of the grinding rod (2) is made of brass, and the conical surface at the bottom end of the grinding rod (2) is provided with a stop structure for fixing the grinding cloth (3).

3. A high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat according to claim 2, characterized in that: The stop structure is a stop gap (4) provided on the surface of the conical structure. The stop gap (4) has a width of 1.5 mm and is used to embed the bent end of the abrasive cloth (3). The bent end of the abrasive cloth (3) is embedded in the stop gap (4) to fix the abrasive cloth (3).

4. The high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat according to claim 1, characterized in that: The driving rod (1) is made of No. 45 steel, and the top end of the driving rod (1) is connected to a driving device. The driving device is a stepless speed-changing hand electric drill for providing a stable rotational driving force.

5. The high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat according to claim 1, characterized in that: The invention also comprises a sensor device for monitoring the grinding operation status and the grinding quality, so as to improve the automation degree and the precision of the grinding operation.

6. A high-pressure stop valve seat processing device, applied to a high-efficiency grinding tool for the sealing surface of a high-pressure stop valve seat as claimed in any one of claims 1 to 5, characterized in that: include: A support frame (5), wherein a valve seat fixing mechanism is arranged on an inner wall at a bottom end of the support frame (5), and a displacement mechanism is arranged on an inner wall at a top end of the support frame (5).

7. A high-pressure stop valve seat machining device according to claim 6, characterized in that: The valve seat fixing mechanism comprises: a mounting seat (6), the mounting seat (6) being fixedly mounted on the inner wall of the bottom end of the support frame (5), and the left end of the inner wall of the mounting seat (6) is rotatably connected to one end of a threaded rod (7), the other end of the threaded rod (7) passes through the mounting seat (6) and is fixedly connected to the turntable (8), the left and right ends of the threaded rod (7) have opposite threads, the sliding rod (27) is fixedly mounted on the inner wall of the mounting seat (6) at the top end of the threaded rod (7), and the threaded rod (7) is threadedly connected to two sets of fixing components; The fixing assembly comprises: a slider (9), wherein the slider (9) is threadedly connected to a threaded rod (7), wherein the top end of the slider (9) is fixedly connected to the bottom end of a short rod (10), wherein the top end of the short rod (10) passes through a mounting seat (6) and is fixedly connected to a clamping block (11), wherein the short rod (10) is slidably connected to a slide rod (27) left and right, and a return spring (28) is sleeved on the slide rod (27) at one end of the short rod (10) close to the inner wall of the mounting seat (6).

8. A high-pressure stop valve seat processing device according to claim 6, characterized in that: The displacement mechanism comprises: a second short rod (12), the top end of the second short rod (12) being fixedly mounted on the inner wall of the support frame (5), the bottom end of the second short rod (12) being fixedly mounted on the mounting frame (13), the fixed end of the first driving motor (25) being fixedly mounted on the front end of the mounting frame (13), and the output end of the first driving motor (25) passing through the inner wall of the mounting frame (13) and being fixedly connected to the second threaded rod (14), the other end of the second threaded rod (14) being rotatably connected to the inner wall of the rear end of the mounting frame (13), and the second threaded rod (14) being threadedly slidably connected to the second slider (15), the bottom ends of both sides of the second slider (15) being fixedly mounted with brackets (16), the bottom ends of the left and right sides of the bracket (16) being slidably connected with racks (17), the bottom end of the second slider (15) being connected to a left and right moving assembly, the bottom end of the rack (17) being connected to a support plate (19) through a plurality of electric lifting rods (18), and the bottom end of the support plate (19) being fixedly mounted with a cutting machine (20).

9. A high-pressure stop valve seat machining device according to claim 8, characterized in that: The cutting machine (20) further comprises: A first temperature sensor is used to detect the temperature of the cutting workpiece at the beginning of cutting; A second temperature sensor is used to detect the temperature of the cutting workpiece during the cutting process; A controller and an alarm, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor and the alarm, and the controller controls the alarm to work based on the first temperature sensor and the second temperature sensor.

10. A high-pressure stop valve seat machining device according to claim 9, characterized in that: The following steps are involved: Step 1: Calculate the thermal conductivity of the workpiece material based on formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor. （1）； in is the interface heat distribution coefficient between the cutting machine (20) and the workpiece, is the heat flux per unit area per unit time at the shear surface, is the cutting thickness, is the cocut, is the shear angle between the cutting machine (20) and the workpiece, is the cutting speed of the cutting machine (20), is the cutting shear strain, is the thermal conductivity of the workpiece material, is the detection value of the first temperature sensor, is the detection value of the second temperature sensor; Step 2: Calculate the actual heat generated by the cutting machine (20) teeth on the cutting surface according to the following formula (2): The controller compares the actual heat generated by the cutting machine (20) teeth on the cutting surface When the actual heat output exceeds the preset heat output range, the controller will control the alarm to sound. （2）； in is the ratio of heat flowing to the workpiece chips, is the contact surface between the cutting tool and the workpiece on the cutting machine (20), is the cutting width, is the cutting contact line length, is the friction coefficient between the cutting tool and the workpiece on the cutting machine (20), is the cross-sectional area of ​​the cutting layer, is a sine, is the cosine, It is the front angle of the cutting blade on the cutting machine (20).

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