A special tool for repairing a cutting torch needle valve

Abstract

The application relates to the technical field of needle valve repair, and discloses a special tool for cutting torch needle valve repair, which comprises a handheld disc, a needle valve seat polishing assembly and a needle valve head polishing assembly. The needle valve seat polishing assembly comprises a mounting cylinder, the inner wall of the mounting cylinder is provided with three mounting grooves arranged in a circumferential array, the bottom outer surface of the mounting cylinder is provided with a polishing head, the inside of the handheld disc is provided with a conical groove, the needle valve head polishing assembly is arranged in the inside of the conical groove, the needle valve head polishing assembly comprises a conical disc, and the center of the conical disc is provided with a polishing groove. The polishing head is inserted into the needle valve seat, the needle valve head is inserted into the polishing groove, the handheld disc is rotated, the polishing head and the polishing groove are driven to rotate by the handheld disc, and the needle valve seat and the needle valve head are polished, so that the needle valve seat and the needle valve head can be polished and repaired, the valve seat and the valve head do not need to be replaced, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of needle valve repair, in particular to a special tool for repairing a cutting torch needle valve. BACKGROUND

[0002] The cutting torch is the main tool for cutting workpieces. The cutting torch mixes oxygen and acetylene in a certain proportion to form a preheating flame, and sprays high-pressure pure oxygen onto the cut workpiece to make the cut metal burn in the oxygen jet, and the oxygen jet blows away the molten slag (oxide) generated by combustion to form a cutting gap. The cutting torch is commonly used in the process of repairing ships.

[0003] The traditional two-tube cutting torch has the problems of easy pipe explosion, easy gas leakage, fast oxidation, plastic handle, and many safety hazards. The equal-pressure three-tube cutting torch has the advantages of not easy to leak gas, not easy to explode, fast cutting speed, seamless welding of silver welding, and humanized metal handle. The three-tube equal-pressure structure gas branch design truly achieves no back suction, no backfire, and more safety. However, due to long-term frequent use, the three-way gas needle valve is easy to be damaged and leak, and the needle valve head needs to be replaced at a cost of 20 yuan per piece. The cutting torch body valve seat wear requires the whole to be replaced, increasing the cost. Therefore, a special tool for repairing a cutting torch needle valve is proposed. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a special tool for repairing a cutting torch needle valve to solve the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a special tool for repairing a cutting torch needle valve, comprising a handheld disc, a needle valve seat polishing assembly and a needle valve head polishing assembly, the needle valve seat polishing assembly comprises a mounting cylinder, three mounting grooves are arranged in a circumferential array on the inner wall of the mounting cylinder, a polishing head is mounted on the bottom outer surface of the mounting cylinder, a conical groove is formed in the inside of the handheld disc, and the needle valve head polishing assembly is arranged in the inside of the conical groove. The needle valve head polishing assembly comprises a conical disc, and a polishing groove is formed in the center of the conical disc.

[0006] As a further description of the present application, the bottom of the handheld disc is provided with a mounting assembly, the mounting assembly comprises a mounting sleeve fixedly connected to the bottom of the handheld disc, three first steel balls are arranged in a circumferential array in the inside of the mounting sleeve, a connecting rod is fixedly connected to the side of each first steel ball away from the other first steel ball, a conical block is arranged between the three first steel balls, a supporting block is fixedly connected to the side of the connecting rod away from the first steel ball, and the supporting block movably penetrates the outer surface of the mounting sleeve.

[0007] As a further illustration of the application, the inside of the mounting sleeve is provided with a positioning assembly, the positioning assembly comprises a conical sleeve, one side of the conical sleeve is fixedly connected with a fixed rod, the other side of the fixed rod is fixedly connected with the inner wall of the mounting sleeve, the inside of the conical sleeve is provided with a conical cylinder, the outer surface of the conical cylinder is provided with three vertical grooves arranged in a circumferential array, the inside of the conical cylinder is provided with three second steel balls arranged in a circumferential array, the three second steel balls are movably arranged in the inside of the three vertical grooves respectively, the top outer surface of the conical block is fixedly connected with a door-shaped frame, the bottom outer surface of the door-shaped frame is fixedly connected with a pin, the pin is movably inserted between the three second steel balls.

[0008] As a further illustration of the application, the bottom outer surface of the conical cylinder and the bottom outer surface of the door-shaped frame are fixedly connected with a cross bar, an adjusting assembly is arranged between the two cross bars, the adjusting assembly comprises two connecting rods, the two connecting rods are rotatably connected with the two cross bars respectively, an adjusting rod is movably inserted on the right outer surface of the mounting sleeve, one side of the adjusting rod located in the inside of the mounting sleeve is fixedly connected with a connecting block, the other end of the two connecting rods is rotatably connected with the top and the bottom of the connecting block respectively, a second spring is fixedly connected between the connecting block and the inner wall of the mounting sleeve, the second spring is sleeved on the outer surface of the adjusting rod.

[0009] As a further illustration of the application, one side of the conical disc is provided with a limiting assembly, the limiting assembly comprises three accommodating grooves arranged in a circumferential array on the surface of the conical disc, the inside of the three accommodating grooves is fixedly connected with a first spring respectively, the other end of the first spring is fixedly connected with a limiting block, the inner wall of the conical groove is provided with three limiting grooves arranged in a circumferential array.

[0010] As a further illustration of the application, the top outer surface of the door-shaped frame is fixedly connected with a top rod, the top rod is movably attached to the bottom outer surface of the conical disc.

[0011] As a further illustration of the application, the outer surface of the connecting rod is fixedly sleeved with a connecting plate, the connecting plate is fixedly connected with a third spring between the connecting plate and the mounting sleeve.

[0012] As a further illustration of the application, the inner wall of the mounting sleeve is fixedly connected with two supporting rods, the opposite outer surfaces of the two supporting rods are fixedly connected with a sliding rod, the outer surfaces of the two sliding rods are movably sleeved with the two cross bars respectively.

[0013] As a further illustration of the application, the top outer surface and the bottom outer surface of the limiting block are both inclined surfaces.

[0014] As a further illustration of the application, the outer surface of the handheld disc is knurled, the conical disc and the polishing head are made of ductile iron.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In a special tool for repairing a cutting torch needle valve provided by the present invention, a grinding head is inserted into the needle valve seat, and the needle valve head is inserted into the grinding groove. The handheld disk is rotated, and the grinding head and the grinding groove are driven by the handheld disk to rotate to grind the needle valve seat and the needle valve head. In this way, the valve seat and the valve head of the needle valve can be polished and repaired without replacing the valve seat and the valve head, thereby reducing expenditure costs.

[0017] 2. In a special tool for repairing a cutting torch needle valve provided by the present invention, the angle between the connecting rods is changed by adjusting the components, so that the conical cylinder drives the second steel ball to move downward, releasing the limit on the pin, and by driving the gantry upward, the conical block stops squeezing the first steel ball, so that the support block is disengaged from the installation groove, and the limit on the installation cylinder is released, which is convenient for replacing different types of grinding heads, thereby grinding and repairing different types of needle valve seats. Compared with the connection through threaded engagement, it avoids the phenomenon of thread slippage caused by long-term disassembly and assembly.

[0018] 3. In a special tool for repairing a cutting torch needle valve provided by the present invention, when the gantry moves upward, the push rod is driven to push the conical disk upward, and the limit block cooperates with the first spring to store the limit block in the accommodating groove, so that the limit block is disengaged from the limit groove, so that the conical disk and the handheld disk are released from the limit, thereby pushing out the conical disk and replacing the conical disk with different models of grinding grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front view structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention when viewed from above;

[0021] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the mounting sleeve of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the needle valve seat grinding assembly of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the tapered sleeve of the present invention;

[0025] Figure 7 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0026] Figure 8 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0027] Figure 9 The structure schematic diagram for grinding the needle valve seat of the application;

[0028] Figure 10 The structure schematic diagram for grinding the needle valve head of the application.

[0029] In the figure: 1, hand-held disc; 2, mounting assembly; 3, needle valve seat grinding assembly; 4, needle valve head grinding assembly; 5, positioning assembly; 6, limiting assembly; 7, adjusting assembly; 8, third spring; 9, connecting plate; 201, mounting sleeve; 202, first steel ball; 203, conical block; 204, connecting rod; 205, supporting block; 301, mounting cylinder; 302, grinding head; 303, mounting groove; 401, conical disc; 402, grinding groove; 501, conical sleeve; 502, conical cylinder; 503, second steel ball; 504, door-shaped frame; 505, pin; 601, containing groove; 602, first spring; 603, limiting block; 604, limiting groove; 701, connecting rod; 702, connecting block; 703, adjusting rod; 704, second spring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be apparently and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0031] Embodiment 1:

[0032] Please refer to Figures 1-10 The application provides a technical solution: a special tool for repairing a cutting torch needle valve, comprising a hand-held disc 1, a needle valve seat grinding assembly 3 and a needle valve head grinding assembly 4. The needle valve seat grinding assembly 3 comprises a mounting cylinder 301, the inner wall of the mounting cylinder 301 is provided with three mounting grooves 303 arranged in a circumferential array, and the bottom outer surface of the mounting cylinder 301 is provided with a grinding head 302. The inside of the hand-held disc 1 is provided with a conical groove, and the needle valve head grinding assembly 4 is arranged in the inside of the conical groove. The needle valve head grinding assembly 4 comprises a conical disc 401, and the center of the conical disc 401 is provided with a grinding groove 402.

[0033] In the embodiment, the bottom of the handheld disc 1 is provided with a mounting assembly 2, the mounting assembly 2 comprises a mounting sleeve 201 fixedly connected to the bottom of the handheld disc 1, the inside of the mounting sleeve 201 is provided with three first steel balls 202 arranged in a circumferential array, the side opposite to the three first steel balls 202 is fixedly connected with a connecting rod 204, a conical block 203 is arranged between the three first steel balls 202, the side away from the first steel ball 202 of the connecting rod 204 is fixedly connected with a supporting block 205, the supporting block 205 movably penetrates the outer surface of the mounting sleeve 201, specifically, the conical block 203 extrudes the first steel ball 202, so that the first steel ball 202 drives the connecting rod 204 to make the supporting block 205 inserted into the inside of the mounting groove 303, it is worth noting that the elastic pad can be arranged outside the supporting block 205, under the action of the elastic pad, the supporting block 205 can be tightly fitted with the inside of the mounting groove 303, avoiding the needle valve seat polishing assembly 3 from shaking after installation.

[0034] In the embodiment, the inside of the mounting sleeve 201 is provided with a positioning assembly 5, the positioning assembly 5 comprises a conical sleeve 501, one side of the conical sleeve 501 is fixedly connected with a fixed rod, the other side of the fixed rod is fixedly connected with the inner wall of the mounting sleeve 201, the inside of the conical sleeve 501 is provided with a conical cylinder 502, the outer surface of the conical cylinder 502 is provided with three vertical grooves arranged in a circumferential array, the inside of the conical cylinder 502 is provided with three second steel balls 503 arranged in a circumferential array, the three second steel balls 503 are movably arranged in the three vertical grooves respectively, the top outer surface of the conical block 203 is fixedly connected with a door-shaped frame 504, the bottom outer surface of the door-shaped frame 504 is fixedly connected with a pin 505, the pin 505 is movably inserted between the three second steel balls 503, specifically, when the lower horizontal rod moves downward, the conical cylinder 502 moves downward, the steel ball moves downward under the conical cylinder 502, and as the conical cylinder 502 moves downward, the gap below the conical sleeve 501 becomes larger, so that the second steel ball 503 can expand outward, so that the second steel ball 503 releases the limiting of the pin 505, so that the pin 505 can move upward.

[0035] In the embodiment, the bottom outer surface of the conical barrel 502 and the bottom outer surface of the door-shaped frame 504 are fixedly connected with horizontal rods, an adjusting assembly 7 is arranged between the two horizontal rods, the adjusting assembly 7 comprises two connecting rods 701, the two connecting rods 701 are rotatably connected with the two horizontal rods respectively, the right outer surface of the mounting sleeve 201 movably inserts an adjusting rod 703, one side of the adjusting rod 703 in the mounting sleeve 201 is fixedly connected with a connecting block 702, the other ends of the two connecting rods 701 are rotatably connected with the top and bottom of the connecting block 702 respectively, the second spring 704 is fixedly connected between the connecting block 702 and the inner wall of the mounting sleeve 201, the second spring 704 is sleeved on the outer surface of the adjusting rod 703, specifically, by pulling or pushing the adjusting rod 703, the included angle between the connecting rods 701 changes, so that the horizontal plate moves up or down.

[0036] In the embodiment, the outer surface of the connecting rod 204 is fixedly sleeved with a connecting plate 9, the third spring 8 is fixedly connected between the connecting plate 9 and the mounting sleeve 201, specifically, when the conical block stops extruding the first steel ball 202, the third spring 8 resets, so that the connecting plate 9 resets, thereby driving the supporting block 205 to reset.

[0037] In the embodiment, the inner wall of the mounting sleeve 201 is fixedly connected with two supporting rods, the opposite outer surfaces of the two supporting rods are fixedly connected with slide rods, the two horizontal rods are movably sleeved on the outer surfaces of the two slide rods, specifically, when the horizontal rod moves, it slides on the outer surface of the slide rod, so that the horizontal rod moves stably in a straight line.

[0038] In the embodiment, the outer surface of the handheld disc 1 is knurled, the conical disc 401 and the polishing head 302 are made of nodular cast iron, specifically, the knurled handheld disc 1 is convenient to rotate, comfortable to hold, the nodular cast iron material is not easy to deform, has excellent grinding performance, and can be used for a long time.

[0039] In the specific implementation process, when the needle valve seat needs to be polished, the needle valve needle is removed, the user inserts the polishing head 302 into the inside of the needle valve seat by hand holding the hand-held disc 1, and rotates the hand-held disc 1 to polish the needle valve seat; when the needle valve head needs to be polished, the needle valve head is inserted into the inside of the polishing groove 402, and the needle valve head is polished, so that the needle valve head and the valve seat of the needle valve can be polished and repaired, without the need to replace the valve seat and the valve head, thereby reducing the cost; when the polishing head 302 needs to be replaced for polishing different needle valve heads, the adjusting rod 703 is pushed inward, so that the connecting block 702 is driven to move inward, the connecting rod 701 is rotated between the connecting block 702 and the cross rod, the included angle between the two connecting rods 701 changes, and the two cross rods are driven to move away from each other, the lower cross rod drives the conical cylinder 502 to move downward, the steel ball is driven to move downward along with the conical cylinder 502, the gap below the conical sleeve 501 becomes larger along with the downward movement of the conical cylinder 502, so that the second steel ball 503 can expand outward, so that the second steel ball 503 releases the limiting of the pin 505, and the upper cross rod moves upward to drive the door-shaped frame 504 to move upward, so that the conical block 203 moves upward to stop pressing the first steel ball 202, the third spring 8 drives the connecting plate 9 to reset the first steel ball 202, so that the supporting block 205 is separated from the inside of the mounting groove 303, and the mounting cylinder 301 is removed, a new polishing head 302 is replaced to polish the corresponding type of needle valve, when the new polishing head 302 is replaced, the adjusting rod 703 is pushed inward first, the new mounting cylinder 301 is corresponded with the mounting sleeve 201, and the mounting groove 303 is corresponded with the supporting block 205, and then the adjusting rod 703 is pulled outward, so that the two connecting rods 701 drive the two cross rods to move toward each other, when the upper cross rod moves downward, the door-shaped frame 504 drives the pin 505 to insert between the second steel balls 503, so that the second steel balls 503 expand outward, when the pin 505 is taken out, the pin 505 drives the second steel balls 503 to move upward, but the second steel balls 503 cannot move upward due to the small gap above the conical sleeve 501, so that the pin 505 cannot be taken out, when the door-shaped frame 504 moves downward, the conical block 203 moves downward, so that the conical block 203 presses the first steel ball 202 to move outward, until the supporting block 205 is inserted into the mounting groove 303, and the mounting cylinder 301 is fixed.

[0040] Embodiment 1:

[0041] Please refer to Figures 1-10 The present application provides a technical solution:

[0042] During the specific implementation process, in this embodiment, a limiting component 6 is provided on one side of the conical disk 401, and the limiting component 6 includes three receiving grooves 601 arranged in a circular array on the surface of the conical disk 401, and the interior of the three receiving grooves 601 is fixedly connected to a first spring 602, and the other end of the first spring 602 is fixedly connected to a limiting block 603. The inner wall of the conical groove is provided with three limiting grooves 604 arranged in a circular array. Specifically, when the conical disk 401 moves upward, the inner wall of the limiting groove 604 of the handheld disk 1 squeezes the limiting block 603, causing the first spring 602 to deform, so that the limiting block 603 is received in the receiving groove 601, thereby releasing the limit between the handheld disk 1 and the conical disk 401, so that the conical disk 401 is taken out and replaced with a conical disk 401 with a different model of grinding groove 402.

[0043] In this embodiment, a top outer surface of the gantry 504 is fixedly connected to a push rod, and the push rod is movably fitted with the bottom outer surface of the conical disk 401. Specifically, when the gantry 504 moves upward, it drives the push rod to move upward, and the push rod drives the conical disk 401 upward to push the conical disk 401 out.

[0044] In this embodiment, the top outer surface and the bottom outer surface of the limit block 603 are both inclined outer surfaces. Specifically, by setting the inclined outer surface, when the conical disk 401 moves upward, compression occurs between the limit block 603 and the inner wall of the limit groove 604 of the handheld disk 1, so that the limit block 603 can be forced to be received into the interior of the accommodating groove 601.

[0045] Working principle: in actual use, when the needle valve seat needs to be polished, the needle valve needle is removed, the user inserts the polishing head 302 into the inside of the needle valve seat by hand holding the hand-held disc 1, and rotates the hand-held disc 1 to polish the needle valve seat; when the needle valve head needs to be polished, the needle valve head is inserted into the inside of the polishing groove 402, and the needle valve head is polished, so that the needle valve head and the valve seat of the needle valve can be polished and maintained, without replacing the valve seat and the valve head, thereby reducing the cost; when different needle valve heads need to be polished, the adjusting rod 703 is pushed inward, the connecting block 702 is driven to move inward, the connecting rod 701 is rotated between the connecting block 702 and the cross rod, the included angle between the two connecting rods 701 changes, thereby driving the two cross rods to move away from each other, the lower cross rod drives the conical cylinder 502 to move downward, the steel ball moves downward along with the conical cylinder 502, and the gap below the conical sleeve 501 becomes larger, so that the second steel ball 503 can expand outward, thereby releasing the limiting of the second steel ball 503 on the pin 505, the upper cross rod moves upward to drive the door-shaped frame 504 to move upward, so that the conical block 203 moves upward to stop extruding the first steel ball 202, the third spring 8 drives the connecting plate 9 to reset the first steel ball 202, so that the supporting block 205 is separated from the inside of the mounting groove 303, and the mounting cylinder 301 is removed, a new polishing head 302 is replaced to polish the corresponding type of needle valve, when the new polishing head 302 is replaced, the adjusting rod 703 is pushed inward first, the new mounting cylinder 301 is corresponded with the mounting sleeve 201, and the mounting groove 303 is corresponded with the supporting block 205, then the adjusting rod 703 is pulled outward, so that the two connecting rods 701 drive the two cross rods to move towards each other, when the upper cross rod moves downward, the door-shaped frame 504 drives the pin 505 to insert between the second steel balls 503, so that the second steel balls 503 expand outward, when the pin 505 is taken out, the pin 505 drives the second steel balls 503 to move upward, but because the gap above the conical sleeve 501 is small, the second steel balls 503 cannot move upward, so that the pin 505 cannot be taken out, when the door-shaped frame 504 moves downward, the conical block 203 moves downward, so that the conical block 203 extrudes the first steel ball 202 to move outward, until the supporting block 205 is inserted into the mounting groove 303, and the mounting cylinder 301 is fixed.

[0046] During the upward movement of the door-shaped frame 504, the top rod is driven to move upward, the top rod drives the conical disc 401 to move upward, the conical disc 401 is pushed out, when the conical disc 401 moves upward, the inner wall of the limiting groove 604 of the handheld disc 1 extrudes the limiting block 603, the first spring 602 is deformed, the limiting block 603 is accommodated into the accommodating groove 601, so that the handheld disc 1 and the conical disc 401 are released from the limiting, and then the conical disc 401 is taken out, the conical disc 401 of the different models of the polishing groove 402 is replaced, and then the conical disc 401 is suitable for different models of needle valve head polishing.

[0047] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special tool for repairing a cutting torch needle valve, comprising a handheld disc (1), a needle valve seat grinding assembly (3) and a needle valve head grinding assembly (4), characterized in that: The needle valve seat grinding assembly (3) includes a mounting cylinder (301), the inner wall of the mounting cylinder (301) is provided with three mounting grooves (303) arranged in a circumferential array, the outer surface of the bottom of the mounting cylinder (301) is provided with a grinding head (302), the interior of the handheld disk (1) is provided with a conical groove, the needle valve head grinding assembly (4) is arranged inside the conical groove, the needle valve head grinding assembly (4) includes a conical disk (401), the center of the conical disk (401) is provided with a grinding groove (402); the bottom of the handheld disk (1) is provided with a mounting assembly (2), the mounting assembly (2) includes a mounting sleeve (201) fixedly connected to the bottom of the handheld disk (1), the mounting sleeve (2 01) is provided with three first steel balls (202) arranged in a circular array, the three first steel balls (202) are fixedly connected to a connecting rod (204) on opposite sides, a conical block (203) is provided between the three first steel balls (202), the connecting rod (204) is fixedly connected to a support block (205) on the side away from the first steel balls (202), and the support block (205) movably penetrates the outer surface of the mounting sleeve (201); a positioning component (5) is provided inside the mounting sleeve (201), and the positioning component (5) includes a conical sleeve (501), one side of the conical sleeve (501) is fixedly connected to a fixing rod, and the other side of the fixing rod is fixedly connected to the inner wall of the mounting sleeve (201). The conical sleeve (501) is provided with a conical cylinder (502) inside, and the outer surface of the conical cylinder (502) is provided with three vertical grooves arranged in a circumferential array. The conical cylinder (502) is provided with three second steel balls (503) arranged in a circumferential array inside, and the three second steel balls (503) are movably arranged inside the three vertical grooves. The top outer surface of the conical block (203) is fixedly connected to a gantry (504), and the bottom outer surface of the gantry (504) is fixedly connected to a pin (505), and the pin (505) is movably inserted between the three second steel balls (503); the bottom outer surface of the conical cylinder (502) and the bottom outer surface of the gantry (504) are both fixed. A cross bar is fixedly connected, and an adjustment assembly (7) is provided between the two cross bars. The adjustment assembly (7) includes two connecting rods (701), and the two connecting rods (701) are rotatably connected to the two cross bars respectively. An adjustment rod (703) is movably inserted into the right outer surface of the mounting sleeve (201), and the adjustment rod (703) is fixedly connected to a connecting block (702) on one side inside the mounting sleeve (201). The other ends of the two connecting rods (701) are rotatably connected to the top and bottom of the connecting block (702) respectively. A second spring (704) is fixedly connected between the connecting block (702) and the inner wall of the mounting sleeve (201), and the second spring (704) is sleeved on the outer surface of the adjustment rod (703).

2. A special tool for repairing a cutting torch needle valve according to claim 1, characterized in that: A limiting assembly (6) is provided on one side of the conical disk (401), and the limiting assembly (6) comprises three receiving grooves (601) arranged in a circumferential array on the surface of the conical disk (401), a first spring (602) is fixedly connected to the inside of each of the three receiving grooves (601), and the other end of the first spring (602) is fixedly connected to a limiting block (603), and the inner wall of the conical groove is provided with three limiting grooves (604) arranged in a circumferential array.

3. The special tool for repairing a cutting torch needle valve according to claim 1, characterized in that: A top outer surface of the portal frame (504) is fixedly connected to a push rod, and the push rod is movably fitted to the bottom outer surface of the conical disk (401).

4. A special tool for repairing a cutting torch needle valve according to claim 1, characterized in that: A connecting plate (9) is provided on the fixed sleeve on the outer surface of the connecting rod (204), and a third spring (8) is fixedly connected between the connecting plate (9) and the mounting sleeve (201).

5. The special tool for repairing a cutting torch needle valve according to claim 1, characterized in that: The inner wall of the mounting sleeve (201) is fixedly connected to two support rods, the opposite outer surfaces of the two support rods are fixedly connected to sliding rods, and the two cross rods are movably sleeved on the outer surfaces of the two sliding rods.

6. A special tool for repairing a cutting torch needle valve according to claim 2, characterized in that: The top outer surface and the bottom outer surface of the limiting block (603) are both inclined outer surfaces.

7. The special tool for repairing a cutting torch needle valve according to claim 1, characterized in that: The outer surface of the handheld disc (1) is knurled, and the conical disc (401) and the grinding head (302) are made of ductile iron.

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