Special tool for repairing cutting torch needle valve

Abstract

The invention relates to the technical field of needle valve repairing, and discloses a cutting torch needle valve repairing special tool which comprises a handheld disc, a needle valve seat grinding assembly and a needle valve head grinding assembly, the needle valve seat grinding assembly comprises a mounting cylinder, and three mounting grooves formed in a circumferential array are formed in the inner wall of the mounting cylinder; a grinding head is mounted on the outer surface of the bottom of the mounting cylinder, a conical groove is formed in the handheld disc, the needle valve head grinding assembly is arranged in the conical groove, the needle valve head grinding assembly comprises a conical disc, and a grinding groove is formed in the center of the conical disc. The grinding head is inserted into the needle valve seat, the needle valve head is inserted into the grinding groove, the handheld disc is rotated, and the grinding head and the grinding groove are driven by the handheld disc to rotate to grind the needle valve seat and the needle valve head, so that the needle valve seat and the needle valve head can be ground and maintained, the needle valve seat and the needle valve head do not need to be replaced, and the expenditure cost is reduced.

Description

Technical Field

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

[0002] The cutting torch is the main tool for gas cutting workpieces. The cutting torch mixes oxygen and acetylene in proportion to form a preheating flame, and sprays high-pressure pure oxygen onto the workpiece to be cut, so that the cut metal burns in the oxygen jet. The oxygen jet blows away the slag (oxide) generated by the combustion to form a cutting seam. The cutting torch is a commonly used tool in the process of ship repair and construction.

[0003] The traditional two-tube cutting torch with shooting and suction has problems such as easy tube burst, easy gas leakage, fast oxidation speed, plastic handle, and many safety hazards. The isobaric three-tube cutting torch has the advantages of not easy to leak, no tube burst, fast cutting speed, silver welding seamless welding, and humanized metal handle. The three-tube isobaric structure gas branch design truly achieves no flame back suction, no backfire, and is safer. However, due to long-term and frequent use, the three-way gas needle valve is easily damaged and leaks. The needle valve head costs 20 yuan / piece to replace, and the torch body valve seat must be replaced if it is worn, which increases the cost expenditure. Therefore, a special tool for repairing the torch needle valve is proposed. Summary of the invention

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

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a special tool for repairing a cutting torch needle valve, comprising a handheld disk, a needle valve seat grinding assembly and a needle valve head grinding assembly, the needle valve seat grinding assembly comprising a mounting tube, the inner wall of the mounting tube is provided with three mounting grooves arranged in a circular array, a grinding head is installed on the bottom outer surface of the mounting tube, a conical groove is provided inside the handheld disk, the needle valve head grinding assembly is arranged inside the conical groove, and the needle valve head grinding assembly comprises a conical disk, a grinding groove is provided at the center of the conical disk.

[0006] As a further explanation of the present invention, a mounting assembly is provided at the bottom of the handheld disk, and the mounting assembly includes a mounting sleeve fixedly connected to the bottom of the handheld disk, and three first steel balls arranged in a circular array are arranged inside the mounting sleeve, and the three first steel balls are fixedly connected to connecting rods on opposite sides, and conical blocks are provided between the three first steel balls, and a support block is fixedly connected to the side of the connecting rod away from the first steel balls, and the support block movably passes through the outer surface of the mounting sleeve.

[0007] As a further explanation of the present invention, a positioning assembly is provided inside the mounting sleeve, and the positioning assembly includes a conical sleeve, one side of the conical sleeve 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, a conical cylinder is provided inside the conical sleeve, and three vertical grooves arranged in a circular array are provided on the outer surface of the conical cylinder, and three second steel balls arranged in a circular array are provided inside the conical cylinder, and the three second steel balls are movably arranged in the three vertical grooves respectively, and the top outer surface of the conical block is fixedly connected to a portal frame, and the bottom outer surface of the portal frame is fixedly connected to a pin, and the pin is movably inserted between the three second steel balls.

[0008] As a further explanation of the present invention, the bottom outer surface of the conical cylinder and the bottom outer surface of the portal frame are both fixedly connected with a cross bar, an adjustment assembly is arranged between the two cross bars, the adjustment assembly includes two connecting rods, the two connecting rods are respectively rotatably connected to the two cross bars, an adjustment rod is movably inserted into the right outer surface of the mounting sleeve, the adjustment rod is located on one side inside the mounting sleeve and is fixedly connected with a connecting block, the other ends of the two connecting rods are respectively rotatably connected to the top and bottom of the connecting block, a second spring is fixedly connected between the connecting block and the inner wall of the mounting sleeve, and the second spring is sleeved on the outer surface of the adjusting rod.

[0009] As a further explanation of the present invention, a limiting assembly is provided on one side of the conical disk, and the limiting assembly includes three accommodating grooves arranged in a circular array on the surface of the conical disk, and the interiors of the three accommodating grooves are fixedly connected to a first spring, and the other end of the first spring is fixedly connected to a limiting block, and the inner wall of the conical groove is provided with three limiting grooves arranged in a circular array.

[0010] As a further illustration of the present invention, a top outer surface of the gantry is fixedly connected with a push rod, and the push rod is movably fitted with a bottom outer surface of the conical disk.

[0011] As a further explanation of the present invention, a connecting plate is provided on the fixed sleeve on the outer surface of the connecting rod, and a third spring is fixedly connected between the connecting plate and the mounting sleeve.

[0012] As a further explanation of the present invention, the inner wall of the mounting sleeve 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.

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

[0014] As a further illustration of the present invention, the outer surface of the handheld disk is knurled, and the conical disk and the grinding head are made of ductile iron.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In a special tool for repairing a cutting torch needle valve provided by the present invention, a grinding head is inserted into a needle valve seat, and a needle valve head is inserted into a grinding groove, and a hand-held disk is rotated, and the hand-held disk drives the grinding head and the grinding groove to rotate to grind the needle valve seat and the needle valve head, thereby being able to grind and repair the needle valve seat and the valve head, without the need to replace the valve seat and the valve head, thereby reducing expenditure costs.

[0016] 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, and the limit on the pin is released, and the gantry is driven upward to make the conical block stop 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.

[0017] 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 hand-held disk are released from the limit, so that the conical disk can be pushed out and replaced with a conical disk with a different model of grinding groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a bottom view structural schematic diagram of the present invention; Figure 3 It is a front view cross-sectional structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the internal structure of the installation sleeve of the present invention; Figure 5 This is a schematic diagram of the structure of the needle valve seat grinding assembly of the present invention; Figure 6 This is a schematic diagram of the internal structure of the tapered sleeve of the present invention; Figure 7 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 8 For the present invention Figure 4 The enlarged structural diagram at B in the middle; Fig. 9 This is a schematic diagram of the structure of the needle valve seat during grinding of the present invention; Fig.10 It is a schematic diagram of the structure of the needle valve head during grinding of the present invention.

[0019] In the figure: 1. Hand-held disk; 2. Installation assembly; 3. Needle valve seat grinding assembly; 4. Needle valve head grinding assembly; 5. Positioning assembly; 6. Limit assembly; 7. Adjustment assembly; 8. Third spring; 9. Connecting plate; 201. Installation sleeve; 202. First steel ball; 203. Conical block; 204. Connecting rod; 205. Support block; 301. Installation cylinder; 302. Grinding head; 303. Installation groove; 401. Conical disk; 402. Grinding groove; 501. Conical sleeve; 502. Conical cylinder; 503. Second steel ball; 504. Door frame; 505. Pin; 601. Accommodating groove; 602. First spring; 603. Limit block; 604. Limit groove; 701. Connecting rod; 702. Connecting block; 703. Adjustment rod; 704. Second spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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] Embodiment 1: Please refer to Figure 1-Figure 10 The present invention provides a technical solution: a special tool for repairing a cutting torch needle valve, comprising a handheld disk 1, a needle valve seat grinding assembly 3 and a needle valve head grinding assembly 4, the needle valve seat grinding assembly 3 comprising a mounting tube 301, the inner wall of the mounting tube 301 is provided with three mounting grooves 303 arranged in a circular array, a grinding head 302 is installed on the bottom outer surface of the mounting tube 301, a conical groove is provided inside the handheld disk 1, the needle valve head grinding assembly 4 is arranged inside the conical groove, the needle valve head grinding assembly 4 comprises a conical disk 401, and a grinding groove 402 is provided at the center of the conical disk 401.

[0022] In this embodiment, a mounting assembly 2 is provided at the bottom of the handheld disk 1, and the mounting assembly 2 includes a mounting sleeve 201 fixedly connected to the bottom of the handheld disk 1, and three first steel balls 202 arranged in a circular array are provided inside the mounting sleeve 201, and the three first steel balls 202 are fixedly connected to connecting rods 204 on the opposite sides, and a conical block 203 is provided between the three first steel balls 202, and a support block 205 is fixedly connected to the side of the connecting rod 204 away from the first steel balls 202, and the support block 205 movably penetrates the outer surface of the mounting sleeve 201. Specifically, the conical block 203 squeezes the first steel ball 202, so that the first steel ball 202 drives the connecting rod 204 to insert the support block 205 into the interior of the mounting groove 303. It is worth mentioning that an elastic pad can be provided on the outside of the support block 205, and under the action of the elastic pad, the support block 205 can fit tightly with the interior of the mounting groove 303 to prevent the needle valve seat grinding assembly 3 from shaking after installation.

[0023] In this embodiment, a positioning assembly 5 is provided inside the mounting sleeve 201, and the positioning assembly 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, and a conical cylinder 502 is provided inside the conical sleeve 501, and the outer surface of the conical cylinder 502 is provided with three vertical grooves arranged in a circumferential array, and the interior of the conical cylinder 502 is provided with three second steel balls 503 arranged in a circumferential array, and the three second steel balls 503 are movably arranged in the interiors of the three vertical grooves, respectively, and the conical block 203 is provided with a conical cylinder 502. A gantry 504 is fixedly connected to the top outer surface, and a pin 505 is fixedly connected to the bottom outer surface of the gantry 504. The pin 505 is movably inserted between the three second steel balls 503. Specifically, when the lower cross bar moves downward, the conical cylinder 502 is driven to move downward, and the conical cylinder 502 drives the steel balls to move downward. As the conical cylinder 502 moves downward, the gap below the conical sleeve 501 becomes larger, so that the second steel balls 503 can expand outward, so that the second steel balls 503 release the limit on the pin 505, so that the pin 505 can move upward.

[0024] In this embodiment, the bottom outer surface of the conical cylinder 502 and the bottom outer surface of the gantry 504 are fixedly connected with a cross bar, and an adjustment component 7 is arranged between the two cross bars. The adjustment component 7 includes two connecting rods 701, and the two connecting rods 701 are rotatably connected to the two cross bars respectively. An adjusting rod 703 is movably inserted into the right outer surface of the mounting sleeve 201. The adjusting rod 703 is located on one side inside the mounting sleeve 201 and is fixedly connected with a connecting block 702. 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. 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 angle between the connecting rods 701 changes, thereby causing the cross plate to move up or down.

[0025] In this embodiment, a connecting plate 9 is fixedly sleeved 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. Specifically, when the conical block stops squeezing the first steel ball 202, the third spring 8 is reset, so that the connecting plate 9 is reset, thereby driving the support block 205 to reset.

[0026] In this embodiment, two support rods are fixedly connected to the inner wall of the mounting sleeve 201, and sliding rods are fixedly connected to the opposite outer surfaces of the two support rods. Two cross bars are movably mounted on the outer surfaces of the two sliding rods. Specifically, when the cross bars move, they slide on the outer surfaces of the sliding rods, so that the cross bars can move stably in a straight line.

[0027] In this embodiment, the outer surface of the handheld plate 1 is knurled, and the conical plate 401 and the grinding head 302 are made of ductile iron. Specifically, the handheld plate 1 with the knurling is easy to rotate, and it is comfortable and fits the hand. The ductile iron material is not easy to deform, has excellent grinding properties, and can be used for a long time.

[0028] In the specific implementation process, when it is necessary to grind the needle valve seat, the needle valve needle is removed, and the user inserts the grinding head 302 into the interior of the needle valve seat by holding the handheld disk 1, and rotates the handheld disk 1 to grind the needle valve seat. When it is necessary to grind the needle valve head, the needle valve head is inserted into the grinding groove 402, and the needle valve head is rotated to grind it, so that the needle valve head and the valve seat of the needle valve can be polished and repaired, without replacing the valve seat and the valve head, thereby reducing the expenditure cost. When the grinding head 302 needs to be replaced for grinding different needle valve heads, the adjusting rod 703 is pushed inward so that the adjusting rod 703 The connecting block 702 is driven to move inward, so that the connecting rod 701 rotates between the connecting block 702 and the cross bar, so that the angle between the two connecting rods 701 changes, thereby driving the two cross bars to move away from each other, and the lower cross bar drives the conical cylinder 502 to move downward, and the conical cylinder 502 drives the steel ball to move downward. 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 limit on the pin 505, and the upper cross bar moves upward to drive the gantry 504 to move upward, so that the conical cylinder 502 The block 203 moves upward to stop squeezing the first steel ball 202, and the third spring 8 drives the connecting plate 9 to reset the first steel ball 202, so that the support block 205 is separated from the inside of the installation groove 303, so that the installation cylinder 301 is removed, and a different type of grinding head 302 is replaced to grind the needle valve of the corresponding type. When replacing a new grinding head 302, first push the adjusting rod 703 inward to make the new installation cylinder 301 correspond to the installation sleeve 201, and make the installation groove 303 correspond to the support block 205, and then pull the adjusting rod 703 outward to make the two connecting rods 701 respectively drive the two cross bars to move closer to each other. When the upper cross bar moves downward, the door frame 504 drives the pin 505 to be inserted between the second steel balls 503, so that the second steel balls 503 expand outward. When the pin 505 wants to be taken out, the pin 505 drives the second steel balls 503 to move upward. However, due to the small gap above the conical sleeve 501, the second steel balls 503 cannot move upward, so that the pin 505 cannot be taken out. When the door frame 504 moves downward, it drives the conical block 203 to move downward, so that the conical block 203 squeezes the first steel ball 202 and moves outward until the support block 205 is inserted into the installation groove 303 and the installation cylinder 301 is fixed.

[0029] Embodiment 1: Please refer to Figure 1-Figure 10 , the present invention provides a technical solution: 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 interiors of the three receiving grooves 601 are fixedly connected with a first spring 602, 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 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, so that the first spring 602 is deformed, and the limiting block 603 is stored in the containing groove 601, so that the handheld disk 1 and the conical disk 401 are released from the limit, so that the conical disk 401 is taken out and replaced with a conical disk 401 with a different model of grinding groove 402.

[0030] In this embodiment, a top outer surface of the gantry 504 is fixedly connected with 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.

[0031] 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.

[0032] Working principle: In actual use of the present invention, when it is necessary to grind the needle valve seat, the needle valve needle is removed, and the user inserts the grinding head 302 into the interior of the needle valve seat by holding the handheld disk 1, and rotates the handheld disk 1 to grind the needle valve seat. When it is necessary to grind the needle valve head, the needle valve head is inserted into the grinding groove 402, and the needle valve head is rotated to grind it, so that the needle valve head and the valve seat of the needle valve can be polished and repaired, without replacing the valve seat and the valve head, thereby reducing the expenditure cost. When the grinding head 302 needs to be replaced for grinding different needle valve heads, the adjusting rod 703 is pushed inward to make The adjusting rod 703 drives the connecting block 702 to move inward, so that the connecting rod 701 rotates between the connecting block 702 and the cross bar, so that the angle between the two connecting rods 701 changes, thereby driving the two cross bars to move away from each other, and the lower cross bar drives the conical cylinder 502 to move downward, and the conical cylinder 502 drives the steel ball to move downward. 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 limit on the pin 505, and the upper cross bar moves upward to drive the door frame 504 to move upward, so that The conical block 203 moves upward, and the first steel ball 202 stops being squeezed. The third spring 8 drives the connecting plate 9 to reset the first steel ball 202, so that the support block 205 is separated from the inside of the installation groove 303, so that the installation cylinder 301 is removed, and a different type of grinding head 302 is replaced to grind the needle valve of the corresponding type. When replacing a new grinding head 302, first push the adjustment rod 703 inward, make the new installation cylinder 301 correspond to the installation sleeve 201, and make the installation groove 303 correspond to the support block 205, and then pull the adjustment rod 703 outward, so that the two connecting rods 701 respectively drive the two cross bars to approach each other. When the upper cross bar moves downward, the door frame 504 drives the pin 505 to be inserted between the second steel balls 503, so that the second steel balls 503 expand outward. When the pin 505 wants to be taken out, the pin 505 drives the second steel balls 503 to move upward. However, due to the small gap above the conical sleeve 501, the second steel balls 503 cannot move upward, so that the pin 505 cannot be taken out. When the door frame 504 moves downward, it drives the conical block 203 to move downward, so that the conical block 203 squeezes the first steel ball 202 and moves outward until the support block 205 is inserted into the installation groove 303 and the installation cylinder 301 is fixed.

[0033] 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. When the conical disk 401 moves upward, the inner wall of the limiting groove 604 of the hand-held disk 1 squeezes the limiting block 603, causing the first spring 602 to deform, so that the limiting block 603 is accommodated in the accommodating groove 601, thereby releasing the limit between the hand-held disk 1 and the conical disk 401, so that the conical disk 401 can be taken out, and the conical disk 401 with different models of grinding grooves 402 can be replaced, so that it is suitable for grinding different models of needle valve heads.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special tool for repairing a cutting torch needle valve, comprising a handheld plate (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) comprises a mounting tube (301), the inner wall of the mounting tube (301) is provided with three mounting grooves (303) arranged in a circumferential array, a grinding head (302) is installed on the outer surface of the bottom of the mounting tube (301), a conical groove is provided inside the handheld disk (1), the needle valve head grinding assembly (4) is arranged inside the conical groove, and the needle valve head grinding assembly (4) comprises a conical disk (401), and a grinding groove (402) is provided at the center of the conical disk (401).

2. A special tool for repairing a cutting torch needle valve according to claim 1, characterized in that: A mounting assembly (2) is arranged at the bottom of the handheld disk (1), and the mounting assembly (2) comprises a mounting sleeve (201) fixedly connected to the bottom of the handheld disk (1), and three first steel balls (202) arranged in a circular array are arranged inside the mounting sleeve (201), and the three first steel balls (202) are fixedly connected to connecting rods (204) on opposite sides, and conical blocks (203) are arranged between the three first steel balls (202), and a support block (205) is fixedly connected to the side of the connecting rod (204) away from the first steel balls (202), and the support block (205) movably penetrates the outer surface of the mounting sleeve (201).

3. A special tool for repairing a cutting torch needle valve according to claim 2, characterized in that: A positioning assembly (5) is arranged inside the installation sleeve (201), and the positioning assembly (5) comprises 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 installation sleeve (201), a conical cylinder (502) is arranged inside the conical sleeve (501), and the outer surface of the conical cylinder (502) is provided with three vertical grooves arranged in a circumferential array, and the inside of the conical cylinder (502) is provided with three second steel balls (503) arranged in a circumferential array, and the three second steel balls (503) are movably arranged inside the three vertical grooves, respectively, and the top outer surface of the conical block (203) is fixedly connected to a portal frame (504), and the bottom outer surface of the portal frame (504) is fixedly connected to a plug pin (505), and the plug pin (505) is movably inserted between the three second steel balls (503).

4. A special tool for repairing a cutting torch needle valve according to claim 3, characterized in that: The bottom outer surface of the conical cylinder (502) and the bottom outer surface of the portal frame (504) are both fixedly connected with a cross bar, and an adjustment assembly (7) is arranged between the two cross bars. The adjustment assembly (7) comprises 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 a connecting block (702) is fixedly connected to the side of the adjusting rod (703) located inside the mounting sleeve (201), and 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).

5. 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), the limiting assembly (6) comprising three receiving grooves (601) arranged in a circumferential array on the surface of the conical disk (401), the interiors of the three receiving grooves (601) are all fixedly connected to a first spring (602), the other ends of the first springs (602) are 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.

6. A special tool for repairing a cutting torch needle valve according to claim 3, 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 a bottom outer surface of the conical disk (401).

7. A special tool for repairing a cutting torch needle valve according to claim 2, characterized in that: A connecting plate (9) is fixedly sleeved 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).

8. A special tool for repairing a cutting torch needle valve according to claim 4, characterized in that: The inner wall of the installation 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.

9. A special tool for repairing a cutting torch needle valve according to claim 5, characterized in that: The top outer surface and the bottom outer surface of the limiting block (603) are both inclined outer surfaces.

10. A 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.

Images