A portable dismounting tool for guide sleeve

Abstract

The application discloses a portable dismounting tool for a guide sleeve, which comprises a hydraulic pulling tool, a heating unit and a cooling unit. The hydraulic pulling tool comprises a pulling rod and a hollow oil cylinder. The pulling rod is arranged through an exhaust guide sleeve and is tightly arranged at one end of the exhaust guide sleeve. The other end of the pulling rod is connected with the hollow oil cylinder. The driving force provided by the hollow oil cylinder is transmitted to the exhaust guide sleeve through the pulling rod to pull or push the exhaust guide sleeve out of the guide sleeve hole. The heating unit comprises a high-frequency heating coil, a wire and a controller. The high-frequency heating coil is arranged around the surface of the pulling rod. The wire connects the high-frequency heating coil with the controller. The heating unit is used for heating the exhaust guide sleeve and the guide sleeve hole. The cooling unit comprises an internal water channel, a water inlet, a water outlet and a high-pressure pump. Compared with hammering, the tool can meet the requirement of dismounting the guide sleeve from the cylinder cover, meanwhile, the quality of the cylinder cover body is guaranteed. The tool is simple to operate, time and labor are saved, the repair cost is reduced and the work efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical auxiliary equipment, in particular to a portable guide sleeve disassembly tool. Background Art

[0002] Auxiliary engines (main generators) are an indispensable source of kinetic energy for ship navigation electrical equipment. Each ship is equipped with 3 units, and some special ships have 6 to 7 units of auxiliary engines, each with 6 cylinder heads, and each cylinder head has 4 intake and exhaust guide sleeves. At present, in addition to the main engine, the auxiliary engines of ships entering the factory are relatively more repaired. In addition to normal maintenance after the inspection and repair period, there are also ship owners who purchase second-hand ships and bring them into the factory for thorough inspection (overhaul) to replace all moving parts, such as the cylinder head's intake and exhaust valve seats, intake and exhaust valve stems, intake and exhaust guide sleeves, etc. Among them, the guide sleeve and the cylinder head are interference fit, which is difficult to disassemble and requires two people to cooperate in the construction; Figure 1 As shown, the cylinder head has a first end face and a second end face, and the exhaust guide sleeve is inserted from the first end face and interference fits into the guide sleeve hole. The existing disassembly method is to process a push rod tool, the end of the push rod is a stepped plug, the plug diameter matches the inner diameter of the exhaust guide sleeve and is inserted into the exhaust guide sleeve, and the maximum outer diameter of the push rod is smaller than the diameter of the guide sleeve hole. When in use, the cylinder head is inverted with the second end face facing upward, and the plug of the push rod tool is inserted into the inner hole of the exhaust guide sleeve. The step of the push rod hits the end of the exhaust guide sleeve. One worker holds the side of the push rod to fix its position, and another worker uses a sledgehammer to hit the upper end of the push rod to eject the exhaust guide sleeve from the bottom side. Prolonged hammering not only bends the push rod tool and makes it unusable, but also has high labor intensity. Moreover, the bending of the push rod tool due to long-term hammering can easily cause the bottom of the guide sleeve and the contact surface of the tool to break, resulting in uneven force and more difficult disassembly. With hundreds of auxiliary machines to be repaired every year, the workshop's operating model still relies on traditional manual labor, which has shortcomings such as high costs, high labor intensity and low work efficiency.

[0003] In view of the above, it is necessary to propose a portable guide sleeve disassembly tool to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a portable guide sleeve disassembly tool.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a portable guide sleeve disassembly tool, including a hydraulic pulling tool, which includes a pulling rod and a hollow oil cylinder. The pulling rod is set through the exhaust guide sleeve and one end is tightly set against the exhaust guide sleeve. The hollow oil cylinder is connected to the other end of the pulling rod. The hollow oil cylinder provides a driving force to pull or eject the exhaust guide sleeve from the guide sleeve hole through the pulling rod;

[0006] The heating unit includes a high-frequency heating coil, a wire and a controller. The high-frequency heating coil is arranged around the surface of the pulling rod. The wire connects the high-frequency heating coil to the controller. The heating unit heats the exhaust guide sleeve and the guide sleeve hole.

[0007] The cooling unit includes an internal water circuit, a water inlet, a water outlet, and a high-pressure pump. The outlet end of the high-pressure pump is connected to the water inlet through a water inlet pipe. The internal pipeline is arranged in the pulling rod, and the water inlet is arranged at one end of the pulling rod and the water outlet is arranged at the other end. The water outlet end is connected to the water outlet pipe. The high-pressure pump provides power for the circulation of coolant in the cooling unit.

[0008] Furthermore, the hydraulic pulling tooling also includes a positioning sleeve, a positioning end cover, and a positioning support gasket. The outer diameter of the positioning sleeve matches the annular groove, and the lower end of the positioning sleeve is inserted into the annular groove. The positioning end cover, hollow oil cylinder, and positioning support gasket are arranged in sequence above the positioning sleeve. The positioning end cover and positioning support gasket are both provided with axial holes for the pulling rod to pass through.

[0009] Furthermore, the hydraulic pulling tooling also includes a round nut and a hexagonal nut. External threaded portions are formed on the upper and lower ends of the pulling rod. The pulling rod is arranged along the axis through the exhaust guide sleeve. The lower end of the pulling rod is threaded with a round nut. The outer diameter of the round nut is slightly smaller than the inner diameter of the guide sleeve hole and larger than the inner diameter of the exhaust guide sleeve; the upper end of the pulling rod is threaded with a hexagonal nut, and the hexagonal nut is arranged on the outside of the positioning support gasket.

[0010] Furthermore, a first cylindrical boss is provided on one side of the positioning end cover and a second cylindrical boss is provided on the other side. The first cylindrical boss cooperates with the inner diameter of the positioning sleeve, and the second cylindrical boss cooperates with the inner diameter of the hollow cylinder; a third cylindrical boss is provided on one side of the positioning support gasket, and the third cylindrical boss cooperates with the inner diameter of the free end of the hollow cylinder.

[0011] Furthermore, the hydraulic pulling tooling also includes a base, a pressure cover, and a locking bolt; the base is provided with a supporting edge and a mounting groove, the second end face of the cylinder head is placed on the supporting edge, the pressure cover is pressed on the first end face, and a through hole is provided on the pressure cover, the position of the through hole corresponds to the position of the guide sleeve hole, and a locking space for the cylinder head is formed between the pressure cover and the supporting edge, and a plurality of locking bolts are provided through the edges of the base and the pressure cover, and the locking bolts connect the pressure cover and the base and fix the cylinder head, and a hollow oil cylinder is arranged in the mounting groove.

[0012] Furthermore, the upper end of the hollow oil cylinder is provided with a positioning end cover and a pulling rod in sequence, the lower end of the pulling rod is inserted and fixed in the axial hole of the positioning end cover, and the upper part of the pulling rod is pressed against the lower end of the exhaust guide sleeve.

[0013] Furthermore, the positioning end cover is provided with a first cylindrical boss and a second cylindrical boss, and the pulling rod is provided with a retaining ring. The first cylindrical boss is tightly fitted on the lower side of the retaining ring, and the second cylindrical boss is matched with the inner diameter of the hollow cylinder, and the second cylindrical boss is inserted into the hollow cylinder.

[0014] Furthermore, the pulling rod includes a top rod portion and an insertion rod portion, the upper end of the top rod portion is coaxially arranged with the insertion rod portion, a retaining ring is arranged on the top rod portion, a high-frequency heating coil is arranged on the insertion rod portion, and the insertion rod portion is inserted into the exhaust guide sleeve. The diameter of the top rod portion is larger than the insertion rod portion so that the connecting ends of the two form a step edge, and the step edge is tightly in contact with the lower end of the exhaust guide sleeve.

[0015] A method for using a portable guide sleeve disassembly tool includes the following steps:

[0016] Step 1: Determine the specifications of the exhaust guide sleeve to be disassembled, and select the corresponding pulling rod and hollow cylinder;

[0017] Step 2: Fix the exhaust guide sleeve in the cylinder head to the pulling rod so that the high-frequency heating coil provided on the exhaust guide sleeve completely covers the inner wall of the exhaust guide sleeve in the axial direction, and connect it to the pulling rod through the hollow oil cylinder. Arrange other auxiliary positioning components so that the exhaust guide sleeve can be pulled out or ejected through the hollow oil cylinder and the pulling rod.

[0018] Step 3: Connect the cooling unit. Connect one end of the water inlet pipe to the outlet of the high-pressure pump, the other end of the water inlet pipe to the water inlet, the water outlet to the water outlet pipe, and the other end of the water outlet pipe to the circulation tank. Put the cooling water of the intercooler into use and circulate the coolant in the cooling unit through the high-pressure pump.

[0019] Step 4: Install the temperature sensor for temperature measurement. Place the temperature sensor around both ends of the guide sleeve hole. Apply thermal grease between the contact surface between the temperature sensor and the cylinder head and fix the temperature sensor.

[0020] Step 5: Pre-establish the coolant circulation of the cooling unit, then turn on the controller to control the high-frequency heating coil to heat the exhaust guide sleeve and the guide sleeve hole, heat the guide sleeve hole and the exhaust guide sleeve according to the preset temperature curve, and monitor the temperature at the guide sleeve hole through the temperature sensor;

[0021] Step 6: When the temperature of the guide sleeve hole and the exhaust guide sleeve reaches the preset temperature, control the free end of the hollow cylinder to extend, and apply force to the exhaust guide sleeve through the pulling rod. The high temperature causes the inner hole of the guide sleeve in the cylinder head to expand and helps to separate the exhaust guide sleeve from the guide sleeve hole.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Compared to the previous method of hammering with a large hammer, this tooling not only achieves the required removal of the guide sleeve from the cylinder head, but also ensures the quality of the cylinder head itself. This method is not only simple to operate, but also saves time and effort, reduces repair costs, and improves work efficiency. This tooling can be reused for subsequent replacement of auxiliary engine cylinder head guide sleeves, and its application should be actively promoted to maximize its utilization.

[0024] 2. This device is equipped with a heating unit, which can use a high-frequency heating coil to heat the exhaust guide sleeve and the guide sleeve hole. The exhaust guide sleeve can be easily removed by taking advantage of thermal expansion and contraction. The high-frequency heating has a long heating time and a uniform heating temperature. The temperature sensor is used to control the heating process and the maximum temperature. The temperature control performance is precise, no open flame is generated, the heating is fast, and the disassembly efficiency is high.

[0025] 3. A cooling unit is provided inside the pulling rod. Since the pulling rod will be used many times, in order to avoid the influence of high-frequency heating on the strength of the pulling rod, a high-pressure pump is used to force water supply inside the pulling rod to effectively increase the flow of cooling water and ensure that the temperature of the pulling rod is below 150°. This prevents the metallographic structure of the pulling rod from changing, thus ensuring that the pulling rod can be used many times. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of disassembling the exhaust guide sleeve in the prior art;

[0027] Figure 2 This is a schematic structural diagram of the portable disassembly tool in Example 1 of the present invention;

[0028] Figure 3 This is an exploded view of the portable disassembly tool according to the first embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the structure of the heating unit and the cooling unit in the present invention;

[0030] Figure 5 This is a schematic structural diagram of the portable disassembly tool in the second embodiment of the present invention;

[0031] Figure 6 This is an exploded view of the portable disassembly tooling according to the second embodiment of the present invention;

[0032] In the figure: 1. Cylinder head; 2. Exhaust guide sleeve; 3. Guide sleeve hole; 4. First end face; 5. Second end face; 6. Ejector rod; 7. Plug; 8. Pull rod; 9. Hollow cylinder; 10. High-frequency heating coil; 11. Internal waterway; 12. Water inlet; 13. Water outlet; 14. High-pressure pump; 15. Water inlet pipe; 16. Water outlet pipe; 17. Positioning sleeve; 18. Positioning end cap; 19. Positioning support gasket; 20. Annular groove; 21. Axial hole 22. Round nut; 23. Hexagonal nut; 24. External threaded portion; 25. First cylindrical boss; 26. Second cylindrical boss; 27. Third cylindrical boss; 28. Base; 29. ​​Pressure cover; 30. Locking bolt; 31. Support edge; 32. Mounting groove; 33. Through hole; 34. Locking space; 35. Retaining ring; 36. Push rod portion; 37. Insert rod portion; 38. Step edge; 39. Circulation groove; 40. Temperature sensor; 41. Intercooler. DETAILED DESCRIPTION

[0033] The technical solutions of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1:

[0035] A portable disassembly tool for a guide sleeve, such as Figure 2 As shown, it includes a hydraulic pulling tool, which includes a pulling rod 8, a hollow cylinder 9, a positioning sleeve 17, a positioning end cover 18, and a positioning support gasket 19. The assembly method of the hydraulic pulling tool in this embodiment is as follows Figure 3 As shown, the positioning sleeve 17 is placed in the annular groove 20. The cylinder head 1 is provided with an annular groove 20 on one side of the first end face 4. The exhaust guide sleeve 2 is coaxially arranged in the annular groove 20, and the positioning sleeve 17 forms a support for the upper tooling; then the positioning end cover 18 is placed on the upper end of the positioning sleeve 17. The positioning end cover 18 is provided with a first cylindrical boss 25 on one side and a second cylindrical boss 26 on the other side. The first cylindrical boss 25 matches the inner diameter of the positioning sleeve 17, and the second cylindrical boss 26 matches the inner diameter of the hollow cylinder 9; when the positioning sleeve 17 is placed, the first cylindrical boss 25 is inserted into the upper end of the positioning sleeve 17 to form a coaxial fixation, and then the hollow cylinder 9 is placed on the upper end of the positioning end cover 18, and the second cylindrical boss 26 is inserted into the inner ring of the hollow cylinder 9, and coaxial positioning is also performed;

[0036] The pulling rod 8 is set through the exhaust guide sleeve 2 and one end is tightly set against the exhaust guide sleeve 2. Figure 2 、 3As shown, the pulling rod 8 is inserted upward from the lower end of the exhaust guide sleeve 2; the hydraulic pulling tooling also includes a round nut 22 and a hexagonal nut 23, and the upper and lower ends of the pulling rod 8 are formed with external threaded portions 24. The pulling rod 8 is arranged along the axis through the exhaust guide sleeve 2, and the lower end of the pulling rod 8 is screwed with a round nut 22. The outer diameter of the round nut 22 is slightly smaller than the inner diameter of the guide sleeve hole 3, and larger than the inner diameter of the exhaust guide sleeve 2; it can be understood that the round nut 22 screwed on the lower end of the pulling rod 8 will be stuck in the lower end of the exhaust guide sleeve 2. When the hollow cylinder 9 is extended, the exhaust guide sleeve 2 is pulled upward by the pulling rod 8. At this time, the round nut 22 forms a force application point on the exhaust guide sleeve 2.

[0037] Furthermore, a positioning support washer 19 is placed at the upper free end of the hollow cylinder 9. A third cylindrical boss 27 is provided on one side of the positioning support washer 19, and the third cylindrical boss 27 matches the inner diameter of the free end of the hollow cylinder 9. Since the positioning end cap 18 and the positioning support washer 19 are both provided with an axial hole 21, the pull rod 8 can pass through and provide guidance for it. A guide hole extends through the upper threaded portion of the pull rod 8, and a hexagonal nut 23 is screwed onto the external threaded portion 24 of the upper end of the pull rod 8, so that the hexagonal nut 23 is arranged on the outside of the positioning support washer 19. In this way, when the free end of the hollow cylinder 9 extends, it pushes the positioning support washer 19 upward, and the pulling force is transmitted to the pull rod 8 through the hexagonal nut 23. Then, the other end of the pull rod 8 pushes the exhaust guide sleeve 2 upward through the round nut 22.

[0038] Furthermore, a heating unit is provided, which includes a high-frequency heating coil 10, a wire and a controller, such as Figure 4 As shown, the high-frequency heating coil 10 is arranged around the surface of the pulling rod 8, and the high-frequency heating coil 10 covers the inner wall of the exhaust guide sleeve 2 in the axial direction. The wire connects the high-frequency heating coil 10 to the controller, and the heating unit heats the exhaust guide sleeve 2 and the guide sleeve hole 3; when in use, the controller controls the high-frequency heating coil 10 to be energized through the wire, so that the ferromagnetic exhaust guide sleeve 2 and the guide sleeve hole 3 are quickly heated up to form a slight expansion, and the exhaust guide sleeve 2 can be efficiently removed by utilizing the principle of thermal expansion and contraction in combination with hydraulic pulling.

[0039] like Figure 4As shown, in actual use, the pulling rod 8 can be made of non-ferromagnetic material so that it is not affected by high-frequency heating and heats itself. However, due to the heat accumulation of the guide sleeve hole 3, a higher temperature will be formed inside the pulling rod 8. For this purpose, a cooling unit is provided, which includes an internal water channel 11, a water inlet 12, a water outlet 13, and a high-pressure pump 14. The outlet end of the high-pressure pump 14 is connected to the water inlet 12 through a water inlet pipe 15. The internal pipeline is arranged in the pulling rod 8, and the water inlet 12 is provided at one end of the pulling rod 8 and the water outlet 13 is provided at the other end. The water outlet 13 is connected to the water outlet pipe 16. The high-pressure pump 14 provides power for the circulation of coolant in the cooling unit; when in use, the high-pressure pump 14 forces water to circulate to the internal water channel 11 of the pulling rod 8 through the water inlet pipe 15, providing a higher cooling circulation volume, thereby ensuring that the temperature of the pulling rod 8 is within the range of 150 degrees. Due to the use of high-frequency induction heating, the outer exhaust guide sleeve 2 and the guide sleeve hole 3 are not affected during heating.

[0040] A method for using a portable guide sleeve disassembly tool includes the following steps:

[0041] Step 1: Determine the specifications of the exhaust guide sleeve 2 to be disassembled, and select the pulling rod 8 and hollow cylinder 9 of corresponding sizes; the hollow cylinder 9 is universal, and its hollow inner diameter is larger than the exhaust guide sleeve 2. It is necessary to determine the specifications of the pulling rod 8. Using or processing the specifications that match the inner diameter of the exhaust guide sleeve 2 can make it easier to disassemble the exhaust guide sleeve 2.

[0042] Step 2: Fix the exhaust guide sleeve 2 in the cylinder head 1 with the pulling rod 8 according to the installation steps of the disassembly tooling described above in this embodiment, so that the high-frequency heating coil 10 provided on the exhaust guide sleeve 2 completely covers the inner wall of the exhaust guide sleeve 2 in the axial direction, and connects it to the pulling rod 8 through the hollow cylinder 9. Deploy other auxiliary positioning components, which in this embodiment include the positioning sleeve 17, the positioning end cover 18, the positioning support washer 19, the round nut 22, and the hexagonal nut 23, so that the exhaust guide sleeve 2 can be pulled out or ejected through the hollow cylinder 9 and the pulling rod 8.

[0043] Step 3: Connect the cooling unit, such as Figure 4 As shown, one end of the water inlet pipe 15 is connected to the outlet of the high-pressure pump 14, the other end of the water inlet pipe 15 is connected to the water inlet 12, the water outlet 13 is connected to the water outlet pipe 16, and the other end of the water outlet pipe 16 is connected to the circulation tank 39, so that the cooling water of the intercooler 41 is put into use and the coolant in the cooling unit circulates through the high-pressure pump 14;

[0044] Step 4: Install the temperature sensor 40 for temperature measurement. Install the temperature sensor 40 around both ends of the guide sleeve hole 3. Apply thermal grease between the contact surface between the temperature sensor 40 and the cylinder head 1 and fix the temperature sensor 40.

[0045] Step 5: Pre-establish the coolant circulation of the cooling unit, then turn on the controller to control the high-frequency heating coil 10 to heat the exhaust guide sleeve 2 and the guide sleeve hole 3, heat the guide sleeve hole 3 and the exhaust guide sleeve 2 according to a preset temperature curve, and monitor the temperature of the guide sleeve hole 3 through the temperature sensor 40;

[0046] Step 6: When the temperature of the guide sleeve hole 3 and the exhaust guide sleeve 2 reaches the preset temperature, the free end of the hollow cylinder 9 is controlled to extend, and a force is applied to the exhaust guide sleeve 2 through the pulling rod 8. The high temperature causes the inner hole of the guide sleeve hole 3 in the cylinder head 1 to expand and helps to separate the exhaust guide sleeve 2 from the guide sleeve hole 3.

[0047] Example 2:

[0048] In this embodiment, the structure of the disassembly tooling is improved. In the first embodiment, the exhaust guide sleeve 2 is pulled out by the pulling rod 8. Since a strong pulling force needs to be applied to the pulling rod 8 and a heating unit is provided in the middle of the pulling rod 8, although a cooling unit is provided during long-term use, the pulling rod 8 will be stretched due to multiple pulling and may eventually be broken. In this embodiment, the pulling force applied by the pulling rod 8 on the exhaust guide sleeve 2 is changed to a pushing force, thereby changing the overall stress state of the pulling rod 8 and effectively improving its service life.

[0049] Specifically, such as Figure 5 、 6 As shown, the hydraulic pulling tooling also includes a base 28, a pressure cover 29, and a locking bolt 30; the base 28 is provided with a supporting edge 31 and a mounting groove 32. When in use, the second end face 5 of the cylinder head 1 is placed on the supporting edge 31, and then the pressure cover 29 is pressed onto the first end face 4, and a through hole 33 is provided on the pressure cover 29, and the position of the through hole 33 is made to correspond to the position of the guide sleeve hole 3. During actual processing, the diameter of the through hole 33 is much larger than the diameter of the guide sleeve hole 3, so that the through hole 33 is pressed against the edge of the cylinder head 1, and a locking space 34 for the cylinder head 1 is formed between the pressure cover 29 and the supporting edge 31. A plurality of locking bolts 30 are provided through the edges of the base 28 and the pressure cover 29. The locking bolts 30 connect the pressure cover 29 to the base 28 and fix the cylinder head 1. A hollow oil cylinder 9 is arranged in the mounting groove 32.

[0050] When installing this embodiment, Figure 6As shown, a positioning end cover 18 and a pulling rod 8 are provided in sequence at the upper end of the hollow oil cylinder 9. The lower end of the pulling rod 8 is inserted and fixed in the axial hole 21 of the positioning end cover 18, and the upper part of the pulling rod 8 is tightly pressed against the lower end of the exhaust guide sleeve 2; specifically, the positioning end cover 18 is provided with a first cylindrical boss 25 and a second cylindrical boss 26. The first cylindrical boss 25 is inserted into the interior of the upper free end of the hollow oil cylinder 9 to form a concentric positioning, and the second cylindrical boss 26 is used to support the pulling rod 8. A retaining ring 35 is provided on the pulling rod 8. The first cylindrical boss 25 is tightly fitted on the On the lower side of the retaining ring 35, the lower end of the pulling rod 8 is inserted into the axial hole 21 of the positioning end cover 18 to be fixed; further, the pulling rod 8 includes a push rod 6 and an insertion rod portion 37. The upper end of the push rod 6 is coaxially provided with the insertion rod portion 37, a retaining ring 35 is provided on the push rod 6, and a high-frequency heating coil 10 is provided on the insertion rod portion 37. During installation, the insertion rod portion 37 is inserted into the exhaust guide sleeve 2. The diameter of the push rod 6 is larger than the insertion rod portion 37, so that a step edge 38 is formed at the connecting end of the two, and the step edge 38 is tightly in contact with the lower end of the exhaust guide sleeve 2. During installation, the hollow cylinder 9 is placed in the mounting groove 32, and the second cylindrical boss 26 of the positioning end cap 18 is then placed on the upper end of the hollow cylinder 9. The insertion rod portion 37 of the pull rod 8 is inserted into the exhaust guide sleeve 2 of the cylinder head 1 to be removed. It can be understood that the high-frequency heating coil 10 on the insertion rod portion 37 corresponds to the position of the exhaust guide sleeve 2, so that the position of the exhaust guide sleeve 2 can be accurately heated. The disassembly tool of this embodiment presses and fixes the cylinder head 1 to the base 28 through the pressure cap 29, and lifts the positioning end cap 18 through the free end of the hollow cylinder 9. The thrust is applied to the lower end of the exhaust guide sleeve 2 through the pull rod 8, thereby pushing it out from above. The advantage of this embodiment is that the heating part is located inside the exhaust guide sleeve 2, while the force applying the thrust is on the push rod 6. Therefore, the push rod 6 will not be affected by the high-frequency heating. In addition, this embodiment is also provided with a cooling unit, which circulates coolant during heating to ensure that the temperature of the pull rod 8 is controlled below 150°. Figure 4 As shown, it can be understood that the internal hollow part of the hollow cylinder 9 is used for the circulation water pipe to pass through in this embodiment. The water inlet pipe 15 passes through the hollow cylinder 9 and then passes through the bottom of the base 28, while the top connects the water outlet pipe 16 to the circulation groove 39 through the through hole 33.

[0051] A method for using a portable guide sleeve disassembly tool includes the following steps:

[0052] Step 1: Determine the specifications of the exhaust guide sleeve 2 to be disassembled, and select the pulling rod 8 and hollow cylinder 9 of corresponding sizes; the hollow cylinder 9 is universal, and its hollow inner diameter is larger than the exhaust guide sleeve 2. It is necessary to determine the specifications of the pulling rod 8. Using or processing the specifications that match the inner diameter of the exhaust guide sleeve 2 can make it easier to disassemble the exhaust guide sleeve 2.

[0053] Step 2: Fix the exhaust guide sleeve 2 in the cylinder head 1 with the pulling rod 8 according to the installation steps of the disassembly tooling described above in this embodiment, so that the high-frequency heating coil 10 provided on the exhaust guide sleeve 2 completely covers the inner wall of the exhaust guide sleeve 2 in the axial direction, and connects it to the pulling rod 8 through the hollow cylinder 9. Arrange other auxiliary positioning components, which in this embodiment include the positioning end cover 18, the base 28, the pressure cover 29, the locking bolt 30, the supporting edge 31, and the mounting groove 32; so that the exhaust guide sleeve 2 can be pulled out or ejected through the hollow cylinder 9 and the pulling rod 8;

[0054] Step 3: Connect the cooling unit, such as Figure 4 As shown, one end of the water inlet pipe 15 is connected to the outlet of the high-pressure pump 14, the other end of the water inlet pipe 15 is connected to the water inlet 12, the water outlet 13 is connected to the water outlet pipe 16, and the other end of the water outlet pipe 16 is connected to the circulation tank 39, so that the cooling water of the intercooler 41 is put into use and the coolant in the cooling unit circulates through the high-pressure pump 14;

[0055] Step 4: Install the temperature sensor 40 for temperature measurement. Install the temperature sensor 40 around both ends of the guide sleeve hole 3. Apply thermal grease between the contact surface between the temperature sensor 40 and the cylinder head 1 and fix the temperature sensor 40.

[0056] Step 5: Pre-establish the coolant circulation of the cooling unit, then turn on the controller to control the high-frequency heating coil 10 to heat the exhaust guide sleeve 2 and the guide sleeve hole 3, heat the guide sleeve hole 3 and the exhaust guide sleeve 2 according to a preset temperature curve, and monitor the temperature of the guide sleeve hole 3 through the temperature sensor 40;

[0057] Step 6: When the temperature of the guide sleeve hole 3 and the exhaust guide sleeve 2 reaches the preset temperature, the free end of the hollow cylinder 9 is controlled to extend, and a force is applied to the exhaust guide sleeve 2 through the pulling rod 8. The high temperature causes the inner hole of the guide sleeve hole 3 in the cylinder head 1 to expand and helps to separate the exhaust guide sleeve 2 from the guide sleeve hole 3.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A portable guide sleeve disassembly tool, characterized in that: It comprises a hydraulic pulling tool, which comprises a pulling rod (8) and a hollow oil cylinder (9), wherein the pulling rod (8) is arranged through the exhaust guide sleeve (2) and one end is tightly arranged with the exhaust guide sleeve (2), and the hollow oil cylinder (9) is connected to the other end of the pulling rod (8), and the driving force provided by the hollow oil cylinder (9) is used to push the exhaust guide sleeve (2) out of the guide sleeve hole (3) through the pulling rod (8); A heating unit comprises a high-frequency heating coil (10), a wire and a controller, wherein the high-frequency heating coil (10) is arranged around the surface of the pulling rod (8), and the wire connects the high-frequency heating coil (10) to the controller, and the heating unit heats the exhaust guide sleeve (2) and the guide sleeve hole (3); A cooling unit comprises an internal water circuit (11), a water inlet (12), a water outlet (13), and a high-pressure pump (14); the outlet end of the high-pressure pump (14) is connected to the water inlet (12) via a water inlet pipe (15); the internal water circuit is arranged in a pulling rod (8), and the water inlet (12) is arranged at one end of the pulling rod (8), and the water outlet (13) is arranged at the other end; the water outlet (13) is connected to the water outlet pipe (16); and the high-pressure pump (14) provides power for the circulation of coolant in the cooling unit; The hydraulic pulling tool also includes a base (28), a pressure cover (29), and a locking bolt (30); the base (28) is provided with a supporting edge (31) and a mounting groove (32); the second end face (5) of the cylinder head (1) is placed on the supporting edge (31); the pressure cover (29) is pressed on the first end face (4); a through hole (33) is provided on the pressure cover (29); the position of the through hole (33) corresponds to the position of the guide sleeve hole (3); a locking space (34) for the cylinder head (1) is formed between the pressure cover (29) and the supporting edge (31); a plurality of locking bolts (30) are provided through the edges of the base (28) and the pressure cover (29); the locking bolts (30) connect the pressure cover (29) and the base (28) and fix the cylinder head (1); a hollow oil cylinder (9) is provided in the mounting groove (32); The upper end of the hollow oil cylinder (9) is provided with a positioning end cover (18) and a pulling rod (8) in sequence, the lower end of the pulling rod (8) is inserted and fixed in the axial hole (21) of the positioning end cover (18), and the upper part of the pulling rod (8) is pressed against the lower end of the exhaust guide sleeve (2); The positioning end cover (18) is provided with a first cylindrical boss (25) and a second cylindrical boss (26), and the pulling rod (8) is provided with a retaining ring (35). The first cylindrical boss (25) is tightly fitted on the lower side of the retaining ring (35), and the second cylindrical boss (26) is matched with the inner diameter of the hollow oil cylinder (9). The second cylindrical boss (26) is inserted into the hollow oil cylinder (9); The pulling rod (8) includes a top rod portion (36) and an inserting rod portion (37), the upper end of the top rod portion (36) is coaxially provided with the inserting rod portion (37), a retaining ring (35) is provided on the top rod portion (36), a high-frequency heating coil (10) is provided on the inserting rod portion (37), the inserting rod portion (37) is inserted into the exhaust guide sleeve (2), the diameter of the top rod portion (36) is larger than the inserting rod portion (37) so that the connecting ends of the two form a step edge (38), and the step edge (38) is tightly in contact with the lower end of the exhaust guide sleeve (2); Also included is a method for using the portable guide sleeve disassembly tool, including the following steps: Step 1: Determine the specifications of the exhaust guide sleeve (2) to be disassembled, and select a pull rod (8) and a hollow oil cylinder (9) of corresponding size; Step 2: Fix the exhaust guide sleeve (2) in the cylinder head (1) to the pulling rod (8), so that the high-frequency heating coil (10) provided on the exhaust guide sleeve (2) completely covers the inner wall of the exhaust guide sleeve (2) in the axial direction, and connects it to the pulling rod (8) through the hollow oil cylinder (9), and arranges other auxiliary positioning components so as to facilitate the ejection of the exhaust guide sleeve (2) through the hollow oil cylinder (9) and the pulling rod (8); Step 3: Connect the cooling unit, connect one end of the water inlet pipe (15) to the outlet of the high-pressure pump (14), connect the other end of the water inlet pipe (15) to the water inlet (12), connect the water outlet (13) to the water outlet pipe (16), and connect the other end of the water outlet pipe (16) to the circulation tank (39), put the cooling water of the intercooler (41) into use, and circulate the coolant in the cooling unit through the high-pressure pump (14); Step 4: Setting a temperature sensor (40) for measuring temperature, respectively setting the temperature sensor (40) around both ends of the guide sleeve hole (3), applying thermal conductive silicone grease between the contact surface of the temperature sensor (40) and the cylinder head (1), and fixing the temperature sensor (40); Step 5: pre-establishing a coolant circulation of the cooling unit, then turning on the controller to control the high-frequency heating coil (10) to heat the exhaust guide sleeve (2) and the guide sleeve hole (3), heating the guide sleeve hole (3) and the exhaust guide sleeve (2) according to a preset temperature curve, and monitoring the temperature at the guide sleeve hole (3) through the temperature sensor (40); Step 6: When the temperature of the guide sleeve hole (3) and the exhaust guide sleeve (2) reaches a preset temperature, the free end of the hollow oil cylinder (9) is controlled to extend, and a force is applied to the exhaust guide sleeve (2) through the pulling rod (8). The high temperature causes the inner hole of the guide sleeve hole (3) in the cylinder head (1) to expand and helps to separate the exhaust guide sleeve (2) from the guide sleeve hole (3).

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