A positioning and mounting auxiliary component for an oil cylinder piston and a method of using the same

Abstract

The application discloses a positioning and installing auxiliary component of an oil cylinder piston and a use method thereof, and relates to the technical field of oil cylinder piston positioning and installing auxiliary components, which comprises a bottom cavity, an inverted cone bucket, an extension mechanism, a pushing piston and a concave cone table, the concave cone table is provided with a lower through hole and a lower infiltration hole, the concave cone table is provided with a positioning groove, the outer side wall of the inverted cone bucket is provided with a sliding groove, the inner side wall of the inverted cone bucket is provided with a fixing block, the bottom surface of the fixing block is connected with a calibration pressing block through an extension spring, the calibration pressing block is fixedly connected with a connecting rod, the bottom of the outer side wall of the inverted cone bucket is provided with a positioning block, the inverted cone bucket is provided with an upper through hole and an upper infiltration hole, the calibration pressing block extrudes the oil cylinder piston to position the oil cylinder piston, the pushing piston can controllably push up the oil cylinder piston rod, meanwhile, cooling water is pressed into the inverted cone bucket to quickly cool the oil cylinder piston, efficient positioning and installing of the oil cylinder piston and the oil cylinder piston rod are realized, and there is no gap between the oil cylinder piston and the oil cylinder piston rod, so that the operation efficiency of the oil cylinder is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of positioning and installation technology for hydraulic cylinder pistons, specifically to a positioning and installation accessory for hydraulic cylinder pistons and its usage method. Background Technology

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

[0003] The positioning installation using the ball bearings and ball grooves works well initially, but as the cylinder system is used for a longer period, the gap between the ball bearings and ball grooves will increase, making it easy for the cylinder piston and piston rod to move around. This not only affects the operating efficiency of the cylinder system but also makes the cylinder system noisier. As for welding, since the welding position is generally located at both ends, the weld is not very stable and is not as good as the positioning installation using the ball bearings and ball grooves in actual use.

[0004] To address this, a positioning and installation accessory for a hydraulic cylinder piston and its usage method are proposed to achieve stable and efficient positioning and installation between the hydraulic cylinder piston and the piston rod, thereby improving the operating efficiency of the hydraulic cylinder system. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning and mounting accessory for a hydraulic cylinder piston and its usage method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning and mounting accessory for a hydraulic cylinder piston, comprising a bottom cavity and an inverted conical hopper, wherein a telescopic mechanism is provided at the bottom of the bottom cavity, and a pushing piston is provided at the top movable end of the telescopic mechanism, wherein the outer side wall of the pushing piston and the inner side wall of the bottom cavity are tightly fitted together, wherein a concave conical truncated cone is provided at the top of the bottom cavity, wherein a lower through-hole and several lower penetration holes are provided on the inner bottom surface of the concave conical truncated cone, and a positioning groove is provided on the inner side wall of the concave conical truncated cone;

[0007] The outer wall of the inverted cone bucket has several sliding grooves. The inner wall of the inverted cone bucket is provided with a fixing block above the sliding groove. The bottom surface of the fixing block is connected to a calibration pressure block through a telescopic spring. The calibration pressure block is fixedly connected to the side of the inner wall of the inverted cone bucket with a connecting rod. The connecting rod passes through the sliding groove and is slidably connected to the inner wall of the sliding groove. The bottom of the outer wall of the inverted cone bucket is provided with a positioning block. The inner bottom surface of the inverted cone bucket is provided with an upper through-hole and several upper permeation ports.

[0008] Preferably, the lower inlet is located at the center of the inner bottom surface of the concave cone, and several lower inlet ports are equally spaced around the center of the inner bottom surface of the concave cone. The upper inlet is located at the center of the inner bottom surface of the inverted cone, and several upper inlet ports are equally spaced around the center of the inner bottom surface of the inverted cone.

[0009] Preferably, the chute is equally spaced around the central axis of the inverted cone bucket, and several fixing blocks, telescopic springs and calibration blocks are equally spaced around the central axis of the inverted cone bucket.

[0010] Preferably, the slide groove is provided with four sections, and the fixing block, telescopic spring, calibration pressure block and connecting rod are all provided with four sections.

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

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

[0013] Preferably, the bottom of the outer wall of the bottom cavity is provided with a connecting lug 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, the top surface of the piston has a notch for placing the cylinder piston rod, and the diameters of the cylinder piston rod, the notch, the lower inlet, and the upper throughlet are all equal.

[0015] Preferably, a hydraulic cylinder piston is placed on the inner bottom surface of the inverted cone bucket, the lower infiltration port and the upper infiltration port are both located outside the hydraulic cylinder piston, and the interior of the bottom cavity above the pushing piston is filled with cooling water.

[0016] A method for using a positioning and installation accessory includes the following steps:

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

[0018] Step 2: Insert the cylinder piston rod into the bottom cavity through the lower opening, so that the cylinder piston rod is positioned between the recess and the lower opening, and inject cooling water into the bottom cavity;

[0019] Step 3: After the piston in the oil cylinder inside the inverted conical bucket placed in the high-temperature chamber is heated, its inner diameter increases. The inverted conical bucket is then removed from the high-temperature chamber and placed into the concave cone.

[0020] Step 4: Press down the handle to make the calibration block contact the cylinder piston, restricting the cylinder piston to the center of the bottom surface of the bottom cavity. At the same time, activate the telescopic mechanism to control the piston to rise to a certain height, pushing the cylinder piston rod into the cylinder piston from the lower and upper through ports and out. At this time, the cooling water enters the bottom cavity through the lower and upper through ports under the pressure of the piston to cool the cylinder piston, causing the inner diameter of the cylinder piston to shrink due to cooling and tightening the cylinder piston rod.

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

[0022] Compared with the prior art, the beneficial effects of this invention are as follows: This positioning and installation accessory utilizes a calibration pressure block to squeeze the cylinder piston, positioning the cylinder piston at the center of the inner bottom surface of the inverted cone bucket. This pushes the piston to move controllably upward, lifting the cylinder piston rod and passing it through the cylinder piston. Simultaneously, the cooling water in the bottom cavity is forced into the inverted cone bucket to rapidly cool the cylinder piston. This causes the cylinder piston and cylinder piston rod to be tightly fitted due to thermal expansion and contraction, successfully achieving efficient positioning and installation of the cylinder piston and cylinder piston rod. Furthermore, there is no gap between the cylinder piston and cylinder piston rod, greatly improving their operating efficiency within the cylinder. Finally, the cooling water in the inverted cone bucket is drawn into the bottom cavity by the piston's return stroke for future use or to replace with new cooling water, saving water resources or utilizing the heat energy generated from heat exchange. This makes the device more environmentally friendly. The device has a sophisticated structure and is easy to use. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings described below are merely some embodiments of the present invention, and other drawings can be obtained by those skilled in the art based on these drawings without any inventive effort.

[0024] in:

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

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

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

[0028] Figure 4 This is a schematic diagram of the bottom structure of the inverted conical bucket in this invention;

[0029] Figure 5This is a schematic diagram of the internal structure of the inverted conical bucket in this invention;

[0030] Figure 6 This is a schematic diagram showing the connection between the bottom cavity and the inverted conical bucket in this invention;

[0031] Figure 7 This is a schematic diagram illustrating the usage state of the present invention;

[0032] Figure 8 This is a top view of the entire invention.

[0033] In the diagram: 1. Bottom cavity; 101. Connecting ear; 102. Bottom cover; 103. Concave cone; 104. Lower through-hole; 105. Lower infiltration port; 106. Positioning groove; 2. Inverted cone; 201. Slide groove; 202. Positioning block; 203. Fixing block; 204. Telescopic spring; 205. Upper through-hole; 206. Upper infiltration port; 3. Outer ring; 301. Handle; 302. Calibration pressure block; 303. Connecting rod; 304. Positioning block; 4. Telescopic mechanism; 401. Push piston; 402. Notch; 5. Hydraulic cylinder piston; 501. Hydraulic cylinder piston rod; 6. Cooling water. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of 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 a positioning and mounting accessory for a hydraulic cylinder piston and its usage method:

[0038] A positioning and mounting accessory for a hydraulic cylinder piston includes a bottom cavity 1 and an inverted cone hopper 2. The bottom of the bottom cavity 1 is provided with a telescopic mechanism 4, which can be an electric actuator, hydraulic cylinder, etc. The top movable end of the telescopic mechanism 4 is provided with a pushing piston 401. It should be noted that the outer side wall of the pushing piston 401 and the inner side 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 several lower infiltration holes 105. The inner side wall of the concave cone 103 is provided with a positioning groove 106. The bottom of the outer side wall of the inverted cone hopper 2 is provided with a positioning block 202. The positioning groove 106 and the positioning block 202 are matched with each other.

[0039] Furthermore, the outer wall of the inverted cone bucket 2 is provided with several sliding grooves 201, and the inner wall of the inverted cone bucket 2 is provided with fixing blocks 203 above the sliding grooves 201. The bottom surface of the fixing blocks 203 is connected to the calibration pressure block 302 through the telescopic spring 204. The telescopic spring 204 is fixedly connected to the fixing blocks 203 and the calibration pressure block 302. The calibration pressure block 302 is fixedly connected to the side of the inner wall of the inverted cone bucket 2 with a connecting rod 303. The connecting rod 303 passes through the sliding groove 201 and slides through the inner wall of the sliding groove 201. The inner bottom surface of the inverted cone bucket 2 is provided with an upper through-hole 205 and several upper permeation ports 206.

[0040] It should be noted that the chute 201 penetrates the side wall of the inverted cone bucket 2. The length and width of the chute 201 on the inverted cone bucket 2 are both smaller than the length and width of the side wall of the calibration block 302 that fits against the inner side wall of the inverted cone bucket 2. During the downward movement of the calibration block 302, the calibration block 302 always blocks the chute 201 to prevent the cooling water 6 that enters the inverted cone bucket 2 later from leaking from the chute 201.

[0041] This positioning and installation accessory, consisting of a bottom cavity 1, an inverted conical hopper 2, and a telescopic mechanism 4, utilizes a calibration pressure block 302 to compress the hydraulic cylinder piston 5, positioning it at the center of the inner bottom surface of the inverted conical hopper 2. This pushes the piston 401 to move controllably upward, lifting the hydraulic cylinder piston rod 501 and passing it through the piston 5. Simultaneously, cooling water 6 from the bottom cavity 1 is forced into the inverted conical hopper 2 to rapidly cool the hydraulic cylinder piston 5. This causes the hydraulic cylinder piston 5 and the hydraulic cylinder piston rod 501 to tighten together due to thermal expansion and contraction, successfully achieving efficient positioning and installation of the hydraulic cylinder piston 5 and the hydraulic cylinder piston rod 501. There is no gap between 01, so when running in the oil cylinder, the piston 5 and piston rod 501 of the oil cylinder are less likely to move around, reducing operating noise and greatly improving its operating efficiency in the oil cylinder. Finally, the cooling water 6 in the inverted cone hopper 2 is drawn into the bottom cavity 1 by pushing the piston 401 back to prepare for the next use or to replace the 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 clever structure and is easy to use. When using thermal expansion and contraction to position and install the piston 5 and piston rod 501 of the oil cylinder, the effect is significant and it is suitable for widespread use.

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

[0043] In an optional embodiment: the chute 201 is equally spaced around the central axis of the inverted cone bucket 2, and several fixing blocks 203, telescopic springs 204 and calibration blocks 302 are equally spaced around the central axis of the inverted cone bucket 2. With this arrangement, the device can use the calibration blocks 302 to press the oil cylinder piston 5 and position it at the center of the inner bottom surface of the inverted cone bucket 2, thereby docking with the oil cylinder piston rod 501.

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

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

[0046] In an optional embodiment: an outer ring body 3 is fixedly connected to the outer ends of several connecting rods 303, and a handle 301 is provided on the outer side of the outer ring body 3. With this arrangement, the user can control several connecting rods 303 together through the outer ring body 3, making the operation more convenient.

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

[0048] In an optional embodiment: a notch 402 is provided on the top surface of the piston 401 for placing the cylinder piston rod 501. The cylinder piston rod 501, the notch 402, the lower inlet 105 and the upper throughlet 205 are all of equal diameter for placing the cylinder piston rod 501.

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

[0050] The working principle of this device is briefly described through its usage method and steps, including the following steps: First, after placing the hydraulic cylinder piston 5 on the inner bottom surface of the inverted conical bucket 2, the inverted conical bucket 2 is placed in a high-temperature chamber for heating; Second, the hydraulic cylinder piston rod 501 is inserted into the bottom cavity 1 through the lower through-hole 104, so that the hydraulic cylinder piston rod 501 is positioned between the recess 402 and the lower through-hole 104, and cooling water 6 is injected into the bottom cavity 1; Third, after the hydraulic cylinder piston 5 in the inverted conical bucket 2 placed in the high-temperature chamber is heated, its inner diameter increases, the inverted conical bucket 2 is removed from the high-temperature chamber and placed into the concave conical truncated cone 103; Fourth, the handle 301 is pressed down so that the calibration pressure block 302 contacts the hydraulic cylinder piston 5, thus activating the hydraulic cylinder piston 5. The cylinder piston rod 501 is pushed into the cylinder piston 5 through the lower inlet 104 and the upper inlet 205 and then out through the center of the bottom surface of the bottom cavity 1. At this time, the cooling water 6 enters the bottom cavity 1 through the lower inlet 105 and the upper inlet 206 under the pressure of the piston 401 to cool the cylinder piston 5. This causes the inner diameter of the cylinder piston 5 to shrink due to cooling and to hold the cylinder piston rod 501 tightly. In the fifth step, the cylinder piston 5 and the cylinder piston rod 501 after positioning and installation are taken out from the inside of the inverted cone hopper 2. The telescopic mechanism 4 is activated to control the piston 401 to return and pump the cooling water 6 in the bottom cavity 1 back for reuse.

[0051] In summary, by first heating the hydraulic cylinder piston 5 to increase its inner diameter, and then pushing the hydraulic cylinder piston rod 501 into and out of the hydraulic cylinder piston 5, the hydraulic cylinder piston 5 is positioned at a predetermined position on the hydraulic cylinder piston rod 501. Rapid cooling with cooling water 6 then successfully achieves quick positioning and clamping installation of the hydraulic cylinder piston 5 and hydraulic cylinder piston rod 501. Since there is no gap between the hydraulic cylinder piston 5 and hydraulic cylinder piston rod 501, the stability during subsequent use in the hydraulic cylinder is further enhanced. This method is quick and efficient in practical operation, providing a more efficient path for the positioning and installation of the hydraulic cylinder piston 5 and hydraulic cylinder piston rod 501.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning and mounting accessory for a hydraulic cylinder piston, comprising a bottom cavity (1) and an inverted conical hopper (2), characterized in that: The bottom of the cavity (1) is provided with a telescopic mechanism (4), and the top movable end of the telescopic mechanism (4) is provided with a push piston (401). The outer side wall of the push piston (401) and the inner side wall of the cavity (1) are tightly fitted. The top of the 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 several lower infiltration ports (105). The inner side wall of the concave cone (103) is provided with a positioning groove (106). The outer side wall of the inverted cone bucket (2) is provided with several sliding grooves (201). The inner side wall of the inverted cone bucket (2) is provided with fixing blocks (203) above the sliding grooves (201). The bottom surface of the fixing blocks (203) is connected to a calibration pressure block (302) through a telescopic spring (204). The calibration pressure block (302) is fixedly connected to the side of the inner side wall of the inverted cone bucket (2) with a connecting rod (303). The connecting rod (303) passes through the sliding groove (201) and is slidably connected to the inner wall of the sliding groove (201). The bottom of the outer side wall of the inverted cone bucket (2) is provided with a positioning block (202). The inner bottom surface of the inverted cone bucket (2) is provided with an upper through-hole (205) and several upper permeation ports (206). An outer ring body (3) is fixedly connected to the outer end of several connecting rods (303), and a handle (301) is provided on the outer side of the outer ring body (3). The inner bottom surface of the inverted cone bucket (2) is equipped with a hydraulic cylinder piston (5). The lower infiltration port (105) and the upper infiltration port (206) are located on the outside of the hydraulic cylinder piston (5). The interior of the bottom cavity (1) is filled with cooling water (6) above the push piston (401).

2. The positioning and mounting accessory for a hydraulic cylinder piston according to claim 1, characterized in that: The lower inlet (104) is located at the center of the inner bottom surface of the concave cone (103), and several lower inlets (105) are equally spaced around the center of the inner bottom surface of the concave cone (103). The upper inlet (205) is located at the center of the inner bottom surface of the inverted cone (2), and several upper inlets (206) are equally spaced around the center of the inner bottom surface of the inverted cone (2).

3. The positioning and mounting accessory for a hydraulic cylinder piston according to claim 2, characterized in that: The chute (201) is equally spaced around the central axis of the inverted cone bucket (2), and several of the fixing blocks (203), telescopic springs (204) and calibration blocks (302) are equally spaced around the central axis of the inverted cone bucket (2).

4. The positioning and mounting accessory for a hydraulic cylinder piston according to claim 3, characterized in that: The slide (201) has four openings, and the fixing block (203), the telescopic spring (204), the calibration pressure block (302) and the connecting rod (303) are all provided in fours.

5. A positioning and mounting accessory for a hydraulic cylinder piston according to claim 1 or 4, characterized in that: The connecting rod (303) is fixedly connected to the side wall outside the inverted cone bucket (2) by a positioning block (304) to restrict the connecting rod (303) from being pushed into the inverted cone bucket (2).

6. The positioning and mounting accessory for a hydraulic cylinder piston according to claim 1, characterized in that: The bottom of the outer wall of the bottom cavity (1) is provided with a connecting ear (101) for fixing the position of the bottom cavity (1). The bottom of the bottom cavity (1) has an opening, and a bottom cover (102) is threadedly connected to the bottom opening of the bottom cavity (1).

7. A positioning and mounting accessory for a hydraulic cylinder piston according to claim 6, characterized in that: The top surface of the push piston (401) has a notch (402) for placing the cylinder piston rod (501). The cylinder piston rod (501), the notch (402), the lower inlet (105) and the upper throughlet (205) are all of equal diameter.

8. A method of using the positioning and installation accessory as described in claim 7, characterized in that: Includes the following steps: S1: After placing the cylinder piston (5) on the inner bottom surface of the inverted cone bucket (2), place the inverted cone bucket (2) in a high-temperature chamber for heating; S2: Insert 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 inject cooling water (6) into the bottom cavity (1). S3: The inner diameter of the cylinder piston (5) in the inverted cone bucket (2) placed in the high temperature box increases after heating. The inverted cone bucket (2) is taken out of the high temperature box and placed into the concave cone (103). S4: Press down the handle (301) so that the calibration block (302) contacts the cylinder piston (5) and restricts the cylinder piston (5) to 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 cylinder piston rod (501) into the cylinder piston (5) from the lower through port (104) and the upper through port (205) and out. At this time, the cooling water (6) enters the bottom cavity (1) through the lower through port (105) and the upper through port (206) under the pressure of the push piston (401) to cool the cylinder piston (5), so that the inner diameter of the cylinder piston (5) shrinks due to cooling and hugs the cylinder piston rod (501). S5: Remove the cylinder piston (5) and cylinder piston rod (501) from the inside of the inverted cone bucket (2) after positioning and installation, start the telescopic mechanism (4), control the piston (401) to return, and pump the cooling water (6) in the bottom cavity (1) back for reuse.

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