Positioning and mounting accessory of oil cylinder piston and using method of positioning and mounting accessory

Abstract

The oil cylinder piston positioning and mounting accessory comprises a bottom cavity and an inverted cone hopper and further comprises a telescopic mechanism, a pushing piston and a concave frustum, the concave frustum is provided with a lower penetrating opening and a lower permeating opening, the concave frustum is provided with a positioning groove, the outer side wall of the inverted cone hopper is provided with a sliding groove, and the inner side wall of the inverted cone hopper is provided with a fixing block; the bottom face of the fixing block is connected with a calibration pressing block through a telescopic spring, the calibration pressing block is fixedly connected with a connecting rod, a positioning block is arranged at the bottom of the outer side wall of the inverted cone hopper, and the inverted cone hopper is provided with an upper penetrating opening and an upper permeating opening. The calibration pressing block is used for extruding the oil cylinder piston to position the oil cylinder piston, the piston is pushed to controllably jack up the oil cylinder piston rod upwards, meanwhile, cooling water is pressed into the inverted cone hopper to rapidly cool the oil cylinder piston, and efficient positioning installation of the oil cylinder piston and the oil cylinder piston rod is successfully achieved; and no gap exists between the oil cylinder piston and the oil cylinder piston rod, so that the operation efficiency in the oil cylinder is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of positioning and installing a cylinder piston, and in particular to a positioning and installing auxiliary part of a cylinder piston and a use method thereof. Background Art

[0002] The cylinder piston is an important component in the cylinder system, wherein the cylinder piston is positioned and installed on the cylinder piston rod, and the cylinder piston and the cylinder piston rod are generally positioned and installed by the cooperation of balls and ball grooves, and can also be directly fixedly connected by welding.

[0003] Then, the positioning installation with the cooperation of the ball and the ball groove can perform well in the initial stage of actual use. However, as the cylinder system is used for a long time, the gap between the ball and the ball groove will become larger and larger, making it easy for the cylinder piston and the cylinder piston rod to move, which not only affects the operating efficiency of the cylinder system, but also makes the cylinder system noisy during operation. As for the welding method, since the welding position is generally located at both ends, the welding stability is not good, and in actual use, it is not as good as the positioning installation with the cooperation of the ball and the ball groove.

[0004] To this end, a positioning and installation accessory for a cylinder piston and a use method thereof are proposed to achieve stable and efficient positioning and installation between the cylinder piston and the cylinder piston rod, thereby improving the operating efficiency of the cylinder system. Summary of the invention

[0005] The object of the present invention is to provide a positioning and installation auxiliary part for a cylinder piston and a method for using the same, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning and installation auxiliary part of an oil cylinder piston, comprising a bottom cavity and an inverted cone bucket, wherein a telescopic mechanism is arranged at the inner bottom of the bottom cavity, a push piston is arranged at the top movable end of the telescopic mechanism, an outer wall of the push piston and an inner wall of the bottom cavity are closely fitted, a concave cone is arranged at the top of the bottom cavity, a lower through hole and a plurality of lower penetration holes are arranged on the inner bottom surface of the concave cone, and a positioning groove is arranged on the inner wall of the concave cone;

[0007] The outer wall of the inverted cone bucket is provided with a plurality of slide grooves, and the inner wall of the inverted cone bucket is provided with a fixed block above the slide groove. The bottom surface of the fixed block is connected with a calibration pressure block through a telescopic spring, and the calibration pressure block is fixedly connected with a connecting rod that fits the side of the inner wall of the inverted cone bucket. The connecting rod passes through the slide groove and is slidably connected to the inner wall of the slide groove. A positioning block is provided at the bottom of the outer wall of the inverted cone bucket, and the inner bottom surface of the inverted cone bucket is provided with an upper through opening and a plurality of upper penetration openings.

[0008] Preferably: the lower through opening is opened at the center of the inner bottom surface of the concave cone, and several lower infiltration openings are opened at equal intervals around the center of the inner bottom surface of the concave cone; the upper through opening is opened at the center of the inner bottom surface of the inverted cone, and several upper infiltration openings are opened at equal intervals around the center of the inner bottom surface of the inverted cone.

[0009] Preferably, the slide grooves are arranged at equal intervals around the central axis of the inverted cone bucket, and a plurality of the fixed blocks, telescopic springs and calibration pressure blocks are arranged at equal intervals around the central axis of the inverted cone bucket.

[0010] Preferably, four slide grooves are provided, and four fixed blocks, four telescopic springs, four calibration pressing blocks and four connecting rods are provided.

[0011] Preferably, a positioning block is fixedly connected to the side wall of the connecting rod located outside the inverted cone bucket to limit the connecting rod from being pushed into the inside of the inverted cone bucket.

[0012] Preferably, the outer ends of a plurality of the connecting rods are fixedly connected to an outer ring body, and a handle is provided on the outer side surface of the outer ring body.

[0013] Preferably: a connecting ear is provided at the bottom end of the outer wall of the bottom cavity for fixing the position of the bottom cavity; the bottom of the bottom cavity is open, and a bottom cover is threadedly connected to the bottom opening of the bottom cavity.

[0014] Preferably, a notch is provided on the top surface of the push piston for accommodating the oil cylinder piston rod, and the diameters of the oil cylinder piston rod, the notch, the lower penetration opening and the upper penetration opening are all equal.

[0015] Preferably: an oil cylinder piston is placed on the inner bottom surface of the inverted cone bucket, the lower permeation port and the upper permeation port are both located on the outside of the oil cylinder piston, and the interior of the bottom cavity is located above the push piston and is filled with cooling water.

[0016] A method for using a positioning and installation auxiliary component comprises the following steps:

[0017] Step 1: After placing the oil cylinder piston on the inner bottom surface of the inverted cone bucket, place the inverted cone bucket in a high temperature box for heating;

[0018] Step 2: Place the oil cylinder piston rod into the bottom cavity through the lower through-hole so that the oil cylinder piston rod is placed between the recess and the lower through-hole, and inject cooling water into the bottom cavity;

[0019] Step 3: After the oil cylinder piston in the inverted cone bucket placed in the high temperature box is heated, the inner diameter increases, and the inverted cone bucket is taken out of the high temperature box and placed in the concave cone;

[0020] Step 4: Press the handle downward to make the calibration block contact with the cylinder piston to limit the cylinder piston at the center of the bottom surface of the bottom cavity. At the same time, start the telescopic mechanism to control the piston to rise to a certain height, and push the cylinder piston rod into the cylinder piston from the lower and upper holes and out. At this time, the cooling water enters the bottom cavity through the lower and upper infiltration ports under the extrusion of the piston to cool the cylinder piston, so that the inner diameter of the cylinder piston is reduced due to cooling and the cylinder piston rod is tightly held;

[0021] Step 5: Take out the positioned and installed cylinder piston and cylinder piston rod from the inside of the inverted cone bucket, start the telescopic mechanism, control the piston to return, and pump back the cooling water in the bottom cavity for reuse.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the positioning and installation auxiliary part utilizes a calibrated pressure block to squeeze the oil cylinder piston to position the oil cylinder piston at the center of the inner bottom surface of the inverted cone bucket, and pushes the piston to move upward in a controllable manner to lift the oil cylinder piston rod and pass through the oil cylinder piston. At the same time, the cooling water in the bottom cavity is pressed into the inverted cone bucket to quickly cool the oil cylinder piston, so that the oil cylinder piston and the oil cylinder piston rod are tightly installed due to thermal expansion and contraction, and the efficient positioning and installation of the oil cylinder piston and the oil cylinder piston rod are successfully realized, and there is no gap between the oil cylinder piston and the oil cylinder piston rod, which greatly improves its operating efficiency in the oil cylinder. Finally, the cooling water in the inverted cone bucket is pumped into the bottom cavity by pushing the return movement of the piston for next use or replacement of new cooling water, which saves water resources or utilizes the heat energy generated by heat exchange, making the device more environmentally friendly, and the device has a sophisticated structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] in:

[0025] Figure 1 It is the overall structural view of the present invention;

[0026] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0027] Figure 3 is a cross-sectional view of the bottom cavity of the present invention;

[0028] Figure 4 It is a schematic diagram of the bottom structure of the inverted cone bucket in the present invention;

[0029] Figure 5It is a schematic diagram of the internal structure of the inverted cone bucket in the present invention;

[0030] Figure 6 It is a schematic diagram of the connection between the bottom cavity and the inverted cone bucket in the present invention;

[0031] Figure 7 It is a schematic diagram of the use state of the present invention;

[0032] Figure 8 It is a top view of the whole invention.

[0033] In the figure: 1. bottom cavity; 101. connecting ear; 102. bottom cover; 103. concave cone; 104. lower through hole; 105. lower seepage hole; 106. positioning groove; 2. inverted cone bucket; 201. slide groove; 202. positioning block; 203. fixing block; 204. telescopic spring; 205. upper through hole; 206. upper seepage hole; 3. outer ring body; 301. handle; 302. calibration pressure block; 303. connecting rod; 304. positioning block; 4. telescopic mechanism; 401. push piston; 402. notch; 5. cylinder piston; 501. cylinder piston rod; 6. cooling water. DETAILED DESCRIPTION

[0034] 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.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] Reference Figure 1-8 As shown, the present invention provides a technical solution for positioning and installing an auxiliary component of a cylinder piston and a method for using the auxiliary component:

[0038] A positioning and installation accessory for a cylinder piston includes a bottom cavity 1 and an inverted cone bucket 2. A telescopic mechanism 4 is provided at the inner bottom of the bottom cavity 1. The telescopic mechanism 4 can be an electric push rod, a cylinder, etc. A pushing piston 401 is provided at the top movable end of the telescopic mechanism 4. It should be noted that the outer wall of the pushing piston 401 is tightly fitted with the inner wall of the bottom cavity 1, and a concave cone 103 is provided at the top of the bottom cavity 1. A lower through-hole 104 and a plurality of lower penetration holes 105 are provided on the inner bottom surface of the concave cone 103. A positioning groove 106 is provided on the inner wall of the concave cone 103, wherein a positioning block 202 is provided at the bottom of the outer wall of the inverted cone bucket 2, and the positioning groove 106 and the positioning block 202 match each other.

[0039] Furthermore, the outer wall of the inverted cone bucket 2 is provided with a plurality of slide grooves 201, and the inner wall of the inverted cone bucket 2 is provided with a fixed block 203 above the slide groove 201, and the bottom surface of the fixed block 203 is connected with a calibration pressure block 302 through a telescopic spring 204, wherein the telescopic spring 204 is fixedly connected with the fixed block 203 and the calibration pressure block 302, and the calibration pressure block 302 is fixedly connected with a connecting rod 303 that fits the side of the inner wall of the inverted cone bucket 2, and the connecting rod 303 passes through the slide groove 201 and is slidably connected with the inner wall of the slide groove 201, and the inner bottom surface of the inverted cone bucket 2 is provided with an upper through opening 205 and a plurality of upper penetration openings 206.

[0040] Among them, it should be supplemented that the slide groove 201 passes through the side wall of the inverted cone bucket 2, and the length and width of the slide groove 201 on the inverted cone bucket 2 are smaller than the length and width of the side wall of the calibration block 302 that fits the inner wall of the inverted cone bucket 2. During the downward movement of the calibration block 302, the calibration block 302 always blocks the slide groove 201 to prevent the cooling water 6 that enters the inverted cone bucket 2 later from leaking from the slide groove 201.

[0041] The positioning and installation auxiliary part is arranged through the bottom cavity 1, the inverted cone bucket 2 and the telescopic mechanism 4, etc., and utilizes the calibration pressure block 302 to squeeze the cylinder piston 5 to position the cylinder piston 5 at the center of the inner bottom surface of the inverted cone bucket 2, and pushes the piston 401 to move upward in a controllable manner to lift the cylinder piston rod 501 and pass through the cylinder piston 5. At the same time, the cooling water 6 in the bottom cavity 1 is pressed into the inverted cone bucket 2 to quickly cool the cylinder piston 5, so that the cylinder piston 5 and the cylinder piston rod 501 are tightly installed due to thermal expansion and contraction, and the efficient positioning and installation of the cylinder piston 5 and the cylinder piston rod 501 are successfully realized, and the cylinder piston 5 and the cylinder piston rod 501 are 01, and then when running in the cylinder, it is not easy for the cylinder piston 5 and the cylinder piston rod 501 to move, and the operating noise is reduced, which greatly improves the operating efficiency in the cylinder. Finally, the cooling water 6 in the inverted cone bucket 2 is pumped into the bottom cavity 1 by pushing the piston 401 to move in the return direction for next use or replacement of new cooling water 6, saving water resources or utilizing the heat energy generated by heat exchange, making the device more environmentally friendly. The device has a sophisticated structure and is easy to use. When thermal expansion and contraction are used to position and install the cylinder piston 5 and the cylinder piston rod 501, the effect is remarkable and suitable for promotion and use.

[0042] Reference Figure 6 As shown, in an optional embodiment: the lower through-hole 104 is opened at the center of the inner bottom surface of the concave cone 103, and a plurality of lower infiltration openings 105 are opened at equal intervals around the center of the inner bottom surface of the concave cone 103; the upper through-hole 205 is opened at the center of the inner bottom surface of the inverted cone 2, and a plurality of upper infiltration openings 206 are opened at equal intervals around the center of the inner bottom surface of the inverted cone 2. It should be additionally noted that when the positioning groove 106 and the positioning block 202 are matched and docked, the lower through-hole 104 and the upper through-hole 205 are aligned, and the lower infiltration opening 105 and the upper infiltration opening 206 are aligned.

[0043] In an optional embodiment: the slide groove 201 is opened at equal intervals around the central axis of the inverted cone bucket 2, and a plurality of fixed blocks 203, telescopic springs 204 and calibration pressure blocks 302 are all arranged at equal intervals around the central axis of the inverted cone bucket 2. Through such an arrangement, the device can squeeze the cylinder piston 5 through the calibration pressure block 302 to position it at the center of the inner bottom surface of the inverted cone bucket 2, thereby docking with the cylinder piston rod 501.

[0044] Reference Figure 5 As shown, in an optional embodiment: four slide slots 201 are provided, and four fixing blocks 203, four telescopic springs 204, four calibration pressing blocks 302 and four connecting rods 303 are provided.

[0045] In an optional embodiment: the side wall of the connecting rod 303 located outside the inverted cone bucket 2 is fixedly connected with a positioning block 304 to limit the connecting rod 303 from being pushed into the inverted cone bucket 2, thereby preventing the calibration pressure block 302 from detaching from the inner wall of the inverted cone bucket 2 and causing the cooling water 6 that enters the inverted cone bucket 2 later to leak from the chute 201.

[0046] In an optional embodiment: the outer ends of several connecting rods 303 are fixedly connected to the outer ring body 3, and the outer side surface of the outer ring body 3 is provided with a handle 301. Through such a setting, the user can control several connecting rods 303 together through the outer ring body 3, which makes the operation easier.

[0047] Reference Figure 3 As shown, in an optional embodiment: a connecting ear 101 is provided at the bottom end of the outer wall of the bottom cavity 1 for fixing the position of the bottom cavity 1, the bottom of the bottom cavity 1 is open, and a bottom cover 102 is threadedly connected to the bottom opening of the bottom cavity 1 to facilitate the inspection and replacement of the telescopic mechanism 4.

[0048] In an optional embodiment: a recess 402 is provided on the top surface of the push piston 401 for placing the cylinder piston rod 501 , and the diameters of the cylinder piston rod 501 , the recess 402 , the lower penetration port 105 and the upper penetration port 205 are all equal for placing the cylinder piston rod 501 .

[0049] In an optional embodiment: a cylinder piston 5 is placed on the inner bottom surface of the inverted cone bucket 2, the lower permeate port 105 and the upper permeate port 206 are both located on the outside of the cylinder piston 5, and the interior of the bottom cavity 1 is located above the push piston 401 and is filled with cooling water 6, wherein the cooling water 6 can be replaced by other cooling liquids.

[0050] The working principle of the device is now briefly described through the method and steps of using the device, which include the following steps: the first step is to place the cylinder piston 5 on the inner bottom surface of the inverted cone bucket 2, and then place the inverted cone bucket 2 in a high-temperature box for heating; the second step is to place the cylinder piston rod 501 into the bottom cavity 1 through the lower through-hole 104, so that the cylinder piston rod 501 is placed between the recess 402 and the lower through-hole 104, and cooling water 6 is injected into the bottom cavity 1; the third step is to increase the inner diameter of the cylinder piston 5 in the inverted cone bucket 2 placed in the high-temperature box after heating, and the inverted cone bucket 2 is taken out of the high-temperature box and placed in the concave cone 103; the fourth step is to press the handle 301 downward so that the calibration block 302 contacts the cylinder piston 5 to press the cylinder piston 5 The oil cylinder piston 5 and the oil cylinder piston rod 501 are removed from the inverted cone 2 after being positioned and installed, and the oil cylinder piston 5 and the oil cylinder piston rod 501 are taken out ...

[0051] In summary, by first heating the cylinder piston 5 to increase its inner diameter, and then pushing the cylinder piston rod 501 into the cylinder piston 5 and passing it out, the cylinder piston 5 is placed at a preset position on the cylinder piston rod 501, and quickly cooled by cooling water 6, the cylinder piston 5 and the cylinder piston rod 501 are successfully positioned and clamped and installed. Since there is no gap between the cylinder piston 5 and the cylinder piston rod 501, the stability during the subsequent use of the cylinder is further enhanced. This method is fast and efficient in actual operation, and provides a more efficient path for the positioning and installation of the cylinder piston 5 and the cylinder piston rod 501.

[0052] 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 positioning and mounting accessory for a cylinder piston, comprising a bottom cavity (1) and an inverted cone bucket (2), characterized in that: The inner bottom of the bottom cavity (1) is provided with a telescopic mechanism (4), the top movable end of the telescopic mechanism (4) is provided with a pushing piston (401), the outer wall of the pushing piston (401) and the inner wall of the bottom cavity (1) are tightly fitted, the top of the bottom cavity (1) is provided with a concave cone (103), the inner bottom surface of the concave cone (103) is provided with a lower through hole (104) and a plurality of lower penetration holes (105), and the inner wall of the concave cone (103) is provided with a positioning groove (106); The outer wall of the inverted cone bucket (2) is provided with a plurality of slide grooves (201), and the inner wall of the inverted cone bucket (2) is provided with a fixed block (203) above the slide groove (201). The bottom surface of the fixed block (203) is connected to a calibration pressure block (302) via a telescopic spring (204). The calibration pressure block (302) is fixedly connected to the side surface of the inner wall of the inverted cone bucket (2) and is fitted with a connecting rod (303). The connecting rod (303) passes through the slide groove (201) and is slidably connected to the inner wall of the slide groove (201). A positioning block (202) is provided at the bottom of the outer wall of the inverted cone bucket (2), and an upper through-hole (205) and a plurality of upper penetration holes (206) are provided on the inner bottom surface of the inverted cone bucket (2).

2. The positioning and installation auxiliary component for a cylinder piston according to claim 1, characterized in that: The lower through-hole (104) is opened at the center of the inner bottom surface of the concave cone (103), and a plurality of lower infiltration holes (105) are opened at equal intervals around the center of the inner bottom surface of the concave cone (103). The upper through-hole (205) is opened at the center of the inner bottom surface of the inverted cone (2), and a plurality of upper infiltration holes (206) are opened at equal intervals around the center of the inner bottom surface of the inverted cone (2).

3. The positioning and installation auxiliary component of the oil cylinder piston according to claim 2, characterized in that: The slide grooves (201) are arranged at equal intervals around the central axis of the inverted cone bucket (2), and a plurality of the fixed blocks (203), the telescopic springs (204) and the calibration pressing blocks (302) are arranged at equal intervals around the central axis of the inverted cone bucket (2).

4. The positioning and installation auxiliary component for a cylinder piston according to claim 3, characterized in that: The sliding grooves (201) are provided in four numbers, and the fixing blocks (203), the telescopic springs (204), the calibration pressing blocks (302) and the connecting rods (303) are each provided in four numbers.

5. The positioning and installation auxiliary component for a cylinder piston according to claim 1 or 4, characterized in that: The side wall of the connecting rod (303) located outside the inverted cone bucket (2) is fixedly connected with a positioning block (304) to limit the connecting rod (303) from being pushed into the inside of the inverted cone bucket (2).

6. The positioning and installation auxiliary component for a cylinder piston according to claim 5, characterized in that: The outer ends of a plurality of the connecting rods (303) are fixedly connected to an outer ring body (3), and a handle (301) is provided on the outer side surface of the outer ring body (3).

7. The positioning and installation auxiliary component for a cylinder piston according to claim 6, characterized in that: A connecting ear (101) is provided at the bottom end of the outer wall of the bottom cavity (1) for fixing the position of the bottom cavity (1); the bottom of the bottom cavity (1) is open, and a bottom cover (102) is threadedly connected to the bottom opening of the bottom cavity (1).

8. The positioning and installation auxiliary component for a cylinder piston according to claim 7, characterized in that: The top surface of the push piston (401) is provided with a notch (402) for accommodating the oil cylinder piston rod (501), and the diameters of the oil cylinder piston rod (501), the notch (402), the lower penetration port (105) and the upper penetration port (205) are all equal.

9. The positioning and installation auxiliary component for a cylinder piston according to claim 8, characterized in that: An oil cylinder piston (5) is placed on the inner bottom surface of the inverted cone bucket (2), the lower permeate port (105) and the upper permeate port (206) are both located on the outside of the oil cylinder piston (5), and the interior of the bottom cavity (1) is located above the push piston (401) and is filled with cooling water (6).

10. A method for using the positioning and installation auxiliary component according to claim 9, characterized in that: The following steps are involved: S1: After placing the oil cylinder piston (5) on the inner bottom surface of the inverted cone bucket (2), the inverted cone bucket (2) is placed in a high temperature box for heating; S2: inserting the oil cylinder piston rod (501) into the bottom cavity (1) through the lower through-hole (104), so that the oil cylinder piston rod (501) is located between the recess (402) and the lower through-hole (104), and injecting cooling water (6) into the bottom cavity (1); S3: After the temperature is increased, the inner diameter of the oil cylinder piston (5) in the inverted cone bucket (2) placed in the high temperature box increases, and the inverted cone bucket (2) is taken out of the high temperature box and placed in the concave cone (103); S4: Press the handle (301) downwards so that the calibration pressing block (302) contacts the oil cylinder piston (5) and restricts the oil cylinder piston (5) at the center of the bottom surface of the bottom cavity (1). At the same time, start the telescopic mechanism (4) to control the push piston (401) to rise to a certain height, and push the oil cylinder piston rod (501) into the oil cylinder piston (5) through the lower penetration opening (104) and the upper penetration opening (205) and then pass out. At this time, the cooling water (6) enters the bottom cavity (1) through the lower penetration opening (105) and the upper penetration opening (206) under the pressure of the push piston (401) to cool the oil cylinder piston (5), so that the inner diameter of the oil cylinder piston (5) is reduced due to cooling and the oil cylinder piston rod (501) is tightly held; S5: The positioned and installed oil cylinder piston (5) and the oil cylinder piston rod (501) are taken out from the inside of the inverted cone bucket (2), the telescopic mechanism (4) is started, and the piston (401) is controlled to return, so that the cooling water (6) in the bottom cavity (1) is drawn back for reuse.

Images