A hydraulic jack fixing device and its usage method suitable for irregular bosses

Abstract

This invention discloses a hydraulic jack fixing device and its usage method suitable for irregular protrusions. The device includes a base plate, an intermediate pad, and an upper bracket that are detachably and fixedly connected from bottom to top. The number of intermediate pads is determined by the height of the hydraulic jack base, the lifting stroke range, and the distance from the plane of the irregular protrusion to the object to be lifted. A top groove is provided in the middle of the top of both the base plate and the intermediate pad, and a through hole extending to the lower end face is provided at the bottom of each top groove. The inner edge of the through hole is smaller than the inner edge of the bottom of the top groove. Adjusting pins that can extend and retract radially along the side wall of the base plate are symmetrically arranged. For the protrusions on the irregular protrusion, radial and height adjustments can be achieved by adjusting the adjusting pins and calculating the number of intermediate pads. Furthermore, the magnetic plate ensures that the device can be used stably on inclined surfaces, avoiding risks caused by slippage or tilting of the jack base, thereby ensuring the safety of construction personnel and the quality of construction.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a hydraulic jack fixing device and its usage method suitable for irregular protrusions. Background Technology

[0002] Hydraulic jacks are frequently used during shipbuilding as essential tools for lifting and supporting objects. On flat surfaces, they can be used quickly and conveniently by simply placing them directly on the surface, facilitating smooth construction. However, on surfaces with protrusions or irregular shapes, the flat base of the hydraulic jack makes it difficult to securely adhere to and directly fix it to these protrusions. Furthermore, using hydraulic jacks directly on these irregular surfaces can lead to slippage and capsizing due to the reverse pressure of the hydraulic oil, hindering equipment installation and posing safety hazards.

[0003] In view of this, this application discloses a hydraulic jack fixing device and its usage method suitable for irregular protrusions. This device can make radial and height adjustments to accommodate the protruding parts on irregular protrusions and can be used stably on inclined surfaces. The device design of this application not only solves the technical problem of using hydraulic jacks on irregular surfaces, but also significantly improves the safety and efficiency of the operation. By using this fixing device, the stability of the hydraulic jack in irregular protrusion environments can be ensured, avoiding risks caused by base slippage or tilting, thereby ensuring the safety of construction personnel and the quality of construction. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a hydraulic jack fixing device and its usage method suitable for irregular bosses. This device adopts a split structure, making it easy to disassemble and transport. Its design is simple, low-cost, and widely applicable, effectively solving the technical difficulties of using hydraulic jacks on irregular bosses and improving safety. Furthermore, the method enhances the radial adaptability of the device by adjusting the adjusting pin; by calculating and determining the number of adjusting pads, it can accommodate different lifting heights of hydraulic jacks; and the magnetic plate design at the bottom ensures the stability of the device on inclined surfaces, thereby expanding its application range and enhancing its versatility with irregular bosses.

[0005] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a hydraulic jack fixing device suitable for irregular protrusions, comprising a pad base, an intermediate pad, and an upper bracket that are detachably and fixedly connected from bottom to top, wherein there is one pad base and one upper bracket, and there are several intermediate pads;

[0007] The top of the base plate and the middle plate is provided with a top groove, and the bottom of the middle plate and the upper bracket is provided with a bottom protrusion, the bottom protrusion having a shape that matches the top groove.

[0008] Both the base plate and the top groove of the intermediate plate are provided with through holes. The inner edge of the through hole is smaller than the inner edge of the bottom of the top groove. The through hole of the base plate extends to the bottom end face of the base plate, and the through hole of the intermediate plate extends to the bottom convex end face of the intermediate plate.

[0009] Both the intermediate pad and the upper bracket have side grooves on their side walls. The pad base has symmetrically arranged adjusting pins on its side wall, and the adjusting pins can extend and retract radially along the pad base. Through the relative extension and retraction between the adjusting pins, the pad base is clamped and fixed to the protrusion of the irregular boss.

[0010] As a preferred technical solution, the number of intermediate pads is determined by the height of the hydraulic jack base, the lifting stroke range, and the distance from the irregular protrusion plane to the object to be lifted.

[0011] As a preferred technical solution, the adjusting pin is a needle-tip type, and the adjusting pin includes a needle tip section, a threaded section and a non-threaded section from the top to the bottom. The side wall of the pad base is provided with an internal thread that matches the threaded section, so that the adjusting pin is threadedly connected to the pad base.

[0012] As a preferred technical solution, the top center of the upper bracket is also provided with an anti-slip groove, which has a shape that matches the bottom of the hydraulic jack base.

[0013] A second aspect of the present invention provides a method for using a hydraulic jack fixing device suitable for irregular bosses, comprising the following steps using any of the above-described devices:

[0014] S1. Based on the size and position of the protrusion of the irregular boss under the object to be lifted, select a suitable fixing device and determine the placement position of the pad base.

[0015] S2. Measure the distance from the plane where the pad base is placed on the irregular protrusion to the object to be lifted, and calculate the required number of intermediate pads based on the height of the hydraulic jack base and the lifting stroke range.

[0016] S3. Slide the pad base through the through hole and install it onto the protruding part of the irregular boss; and fix the pad base to the protruding part by adjusting the symmetrically arranged adjusting pins;

[0017] S4. Install the intermediate pad and the upper bracket from bottom to top on the pad base, and place the hydraulic jack on the upper bracket.

[0018] S5. Start the hydraulic jack so that the upper end face of the hydraulic jack contacts the object to be lifted and is subjected to force, and complete the lifting work of the object above the irregular protrusion.

[0019] S6. Remove the fixing devices and hydraulic jacks; construction is complete.

[0020] As a preferred technical solution, step S1 includes the following specific steps:

[0021] S1-1. Clean the irregular protrusions under the object to be lifted, and confirm the size and position of the protrusions on the irregular protrusions;

[0022] S1-2. Select a suitable fixing device according to the size of the protrusion of the irregular boss to ensure that the inner edge of the through hole is not smaller than the outer edge of the protrusion.

[0023] S1-3. At the same time, the placement position of the pad base is determined according to the position of the protrusion of the irregular boss, so that there are no obstacles within the range from the outer diameter of the pad base to the inner edge of the through hole.

[0024] As a preferred technical solution, step S3 includes the following specific steps:

[0025] S3-1. The pad base is fitted onto the protrusion of the irregular boss through the through hole;

[0026] S3-2. By adjusting the radial extension of the adjusting pins on the base plate, the symmetrically arranged adjusting pins are made to contact the protrusions, thereby fixing the base plate clamp to the protrusions and completing the installation of the base plate.

[0027] Furthermore, a magnetic plate is provided at the bottom of the pad base; in step S3-1, after the pad base is fitted onto the protrusion of the irregular boss, the magnetic plate at the bottom of the pad base is used to initially fix the pad base.

[0028] Furthermore, the non-threaded section of the adjusting pin is provided with scale lines; in step S3-2, during the adjustment of the adjusting pin, the following steps are also included: at the same time, observe the scale lines provided on the non-threaded section of the adjusting pin, so that the scale line readings of the two adjusting pins symmetrically provided on the side wall of the pad base are the same, and the top of the pin tip section simultaneously contacts the protrusion, so that the protrusion is located at the center position in the through hole of the pad base.

[0029] As a preferred technical solution, the inner sidewall of the top groove of the pad base and the intermediate pad is provided with an internal thread, and the outer sidewall of the bottom protrusion of the intermediate pad and the upper bracket is provided with an external thread that matches the internal thread. The top groove and the bottom protrusion are threadedly connected. The specific steps of step S4 include: sequentially screwing the intermediate pad and the upper bracket on the top groove and the bottom protrusion with matching shapes and internal and external threads, placing the hydraulic jack base on the upper surface of the upper bracket, and completing the fixation of the hydraulic jack at the irregular protrusion.

[0030] As described above, the present invention has the following beneficial effects:

[0031] This invention discloses a hydraulic jack fixing device and its usage method suitable for irregular protrusions. Through a split structure design using a base plate, intermediate pad, and upper bracket that are detachably and fixedly connected from bottom to top, it is easy to handle, convenient to use, simple in structure, low in manufacturing cost, and has a wide range of applications. It solves the problem of hydraulic jacks being difficult to use on irregular protrusions, reduces potential safety hazards, and is of great benefit to shipbuilding. Simultaneously, the invention increases the adaptability of the fixing device in the radial direction through the adjustment pins integrated into the base plate, and adapts to different lifting heights of various hydraulic jacks by adjusting the number of intermediate pads, greatly increasing the versatility of the fixing device. Furthermore, the invention ensures that the fixing device and hydraulic jack can also be used on inclined surfaces by providing a magnetic plate at the bottom of the base plate, expanding the application scenarios of the fixing device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the pad base in this invention.

[0033] Figure 2 This is a schematic diagram of the overall structure of the intermediate pad in this invention.

[0034] Figure 3 This is a schematic diagram of the overall structure of the upper bracket in this invention.

[0035] Figure 4 This is a schematic diagram of the installation between the fixing device and the irregular convex protrusion in this invention.

[0036] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Pad base; 101. Magnetic plate; 102. Adjusting pin; 2. Intermediate pad; 3. Upper bracket; 4. Top groove; 5. Bottom protrusion; 6. Side groove; 7. Hydraulic jack base; 8. Irregular protrusion; 801. Protrusion. Detailed Implementation

[0037] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0038] In the description of this invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of the embodiments of this invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be construed as a limitation of this invention.

[0039] Example 1

[0040] like Figure 1-3 As shown, this embodiment provides a hydraulic jack fixing device suitable for irregular surfaces, including a base plate 1, several intermediate base plates 2, and an upper bracket 3.

[0041] In this embodiment, the base plate 1 and the intermediate base plate 2 are both annular, and the upper bracket 3 is cylindrical. Both the base plate 1 and the intermediate base plate 2 have a top groove 4 with internal threads at the center of their tops, and the internal threads are of the same specification. Both the intermediate base plate 2 and the upper bracket 3 have bottom protrusions 5 with external threads at the center of their bottoms, and the external threads are of the same specification. The bottom protrusions 5 have a shape that matches the top groove 4, and the top groove 4 with internal threads and the bottom protrusions 5 with external threads are fitted together by a threaded connection. Both the base plate 1 and the intermediate base plate 2 have a circular through hole at the center of the bottom of the top groove 4. The inner edge of the through hole is smaller than the inner edge of the bottom of the top groove 4. The through hole of the base plate 1 extends to the bottom end face of the base plate 1, and the through hole of the intermediate base plate 2 extends to the lower end face of the bottom protrusion 5 of the intermediate base plate 2.

[0042] In other embodiments, the upper bracket 3 is provided with an anti-slip groove in the middle of its top. The anti-slip groove has a shape that matches the bottom of the hydraulic jack base 7, thereby ensuring that the hydraulic jack can be effectively limited and fixed even when the irregular protrusion 8 is an inclined surface. This avoids the risk of the hydraulic jack falling from a height during the lifting process due to the inclined surface, and at the same time improves the personal safety of the operator.

[0043] Both the intermediate pad 2 and the upper bracket 3 have two symmetrically arranged side grooves 6 on their side walls. These two side grooves 6 facilitate the movement and disassembly of the intermediate pad 2 and the upper bracket 3, thereby improving work efficiency. The pad base 1 has symmetrically arranged adjusting pins 102 on its side wall. The adjusting pins 102 are needle-tip type, and from top to bottom, each adjusting pin 102 includes a needle tip section, a threaded section, and a non-threaded section. The side wall of the pad base 1 has an internal thread that matches the threaded section, allowing the adjusting pins 102 to be threadedly connected to the pad base 1. This allows the adjusting pins 102 to move radially along the pad base 1. Through the relative expansion and contraction of the adjusting pins 102, the limiting dimension of the internal space of the through hole is changed, which is used to clamp and fix the pad base 1 to the protrusion 801 of the irregular boss 8. In this embodiment, the non-threaded section is provided with scale lines. By simultaneously adjusting the extension and retraction of the symmetrically arranged adjusting pins 102, the versatility of the fixing device can be increased. Furthermore, the adjusting pins 102 are located near the bottom of the pad base 1, which ensures that even when the protrusion 801 of the irregular boss 8 is low, the pad base 1 can still be clamped and fixed to the protrusion 801 of the irregular boss 8. In addition, a magnetic plate 101 is provided at the bottom of the pad base 1, which is used to increase the friction between the pad base 1 and the contact surface.

[0044] Example 2

[0045] like Figure 4 As shown, this embodiment provides a method for using a hydraulic jack fixing device suitable for irregular bosses according to Embodiment 1, including the following steps:

[0046] S1. Based on the size and position of the protrusion 801 of the irregular protrusion 8 below the object to be lifted, select a suitable fixing device and determine the placement position of the pad base 1.

[0047] S1-1. Clean the irregular boss 8 under the object to be lifted, and confirm the size and position of the protrusion 801 on the irregular boss 8.

[0048] S1-2. Based on the dimensions of the protrusion 801 of the irregular boss 8, select a suitable fixing device to ensure that the diameter of the through hole is not less than the diameter of the protrusion 801.

[0049] S1-3. At the same time, the placement position of the pad base 1 is determined according to the position of the protrusion 801 of the irregular protrusion 8, so that there are no obstacles in the range from the outer diameter of the pad base 1 to the inner edge of the through hole, thereby ensuring the stable placement of the pad base 1.

[0050] S2. Measure the distance from the plane of the base plate 1 on the irregular boss 8 to the object to be lifted, and calculate the required number of intermediate pads 2 based on the height of the hydraulic jack base 7 and the lifting stroke range.

[0051] In this embodiment, the formula for calculating the required quantity of intermediate pads 2 is as follows: The required quantity of intermediate pads 2 ≥ (distance from the plane of the irregular protrusion 8 to the object to be lifted - height of pad base 1 - height of upper bracket 3 - height of hydraulic jack base 7 - maximum stroke height of hydraulic jack) ÷ height of intermediate pads 2, and the required quantity of intermediate pads 2 is rounded up. This is suitable for situations where the project budget is limited, the construction site space is small or the transportation is inconvenient, and it is difficult to move a large number of intermediate pads 2. Thus, without sacrificing safety, the auxiliary heightening of the pad base 1 is achieved with the minimum amount of intermediate pads 2 used. By minimizing the use of materials to control costs, time and labor costs are saved by reducing the number of times the intermediate pads 2 are moved.

[0052] In another embodiment, the formula for calculating the required number of intermediate pads 2 is as follows: the required number of intermediate pads 2 ≤ (distance from the plane of the irregular boss 8 to the object to be lifted - height of the pad base 1 - height of the upper bracket 3 - height of the hydraulic jack base 7 - minimum stroke height of the hydraulic jack) ÷ height of the intermediate pads 2, and the required number of intermediate pads 2 is rounded down. This is applicable to situations where the object to be lifted is very heavy. Since the piston needs to push more hydraulic oil when the hydraulic jack has a long stroke, it will generate greater pressure. This may cause the internal components of the hydraulic jack to bear greater stress, thereby increasing the risk of wear and damage. By setting more intermediate pads 2, the extension stroke of the hydraulic jack can be reduced to the greatest extent, thereby dispersing the pressure on the internal components of the hydraulic jack to avoid damage to the hydraulic jack. At the same time, using more intermediate pads 2 can also provide more stable support and reduce accidents caused by tilting or displacement.

[0053] In other embodiments, if the height of the protrusion 801 of the irregular boss 8 is relatively high, the required number of intermediate pads 2 should be ≥ (height of the protrusion 801 of the irregular boss 8 - height of the pad base 1) ÷ height of the intermediate pad 2. By superimposing the height of the through holes of the pad base 1 and the intermediate base, the adaptability of this fixing device to the protrusion 801 of the irregular boss 8 in the height direction is increased, and interference caused by the upper end of the protrusion 801 to the upper bracket 3 is avoided, thus ensuring the installation and stability of the fixing device.

[0054] S3. Place and install the pad base 1 on the irregular protrusion 8, so that the through hole of the pad base 1 fits onto the protrusion 801.

[0055] S3-1. The pad base 1 is placed on the protrusion 801 of the irregular boss 8 through the through hole, and the pad base 1 is initially fixed by the magnetic plate 101 at the bottom of the pad base 1.

[0056] S3-2. By adjusting the radial extension of the adjusting pins 102 on the pad base 1, the symmetrically arranged adjusting pins 102 are brought into contact with the protrusions 801, thereby clamping the pad base 1 to the protrusions 801. The telescoping adjustment of the adjusting pins 102 on the pad base 1 increases the adaptability of this fixing device to the protrusions 801 of irregular bosses 8 in the radial direction. During the adjustment of the adjusting pins 102, the scale lines on the non-threaded sections of the adjusting pins 102 are observed simultaneously. The scale readings of the two symmetrically arranged adjusting pins 102 on the side wall of the pad base 1 are made the same, and the tips of the pins are simultaneously in contact with the protrusions 801, thus ensuring that the protrusions 801 are located at the center position within the through hole of the pad base 1. The installation of the pad base 1 is then completed.

[0057] S4. Install the intermediate pad 2 and the upper bracket 3 sequentially from bottom to top on the pad base 1, and place the hydraulic jack on the upper bracket 3: Through the top groove 4 and bottom protrusion 5 that match the shape and internal and external threads, screw the intermediate pad 2 and the upper bracket 3 in sequence, and place the hydraulic jack base 7 on the upper surface of the upper bracket 3 to complete the fixation of the hydraulic jack at the irregular protrusion 8.

[0058] S5. Start the hydraulic jack, so that the upper end of the hydraulic jack contacts the object to be lifted and is subjected to force, and complete the lifting work of the object above the 8 irregular protrusions.

[0059] S6. Remove the fixing device and hydraulic jack, and the construction is completed: Specifically, by reversing the operation of steps S3-S5, lower and remove the hydraulic jack, and remove the upper bracket 3, each intermediate pad 2 and pad base 1 from top to bottom.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention.

Claims

1. A hydraulic jack fixing device suitable for an irregular boss, characterized in that, It comprises a base plate base (1), an intermediate base plate (2) and an upper bracket (3) which are sequentially detachably fixed from bottom to top, wherein the number of the base plate base (1) and the upper bracket (3) is one respectively, and the number of the intermediate base plate (2) is several; The top middle of the base plate base (1) and the intermediate base plate (2) is provided with a top groove (4), and the bottom middle of the intermediate base plate (2) and the upper bracket (3) is provided with a bottom convex (5), and the bottom convex (5) has a shape matched with the top groove (4); The bottom of the top groove (4) of the base plate base (1) and the intermediate base plate (2) is provided with a through hole, the inner edge of the through hole is smaller than the inner edge of the bottom of the top groove (4), the through hole of the base plate base (1) penetrates to the bottom end face of the base plate base (1), and the through hole of the intermediate base plate (2) penetrates to the bottom convex (5) of the intermediate base plate (2). The sidewall of the intermediate base plate (2) and the upper bracket (3) is provided with a side groove (6), and the sidewall of the base plate base (1) is symmetrically provided with an adjusting pin (102), and the adjusting pin (102) can be telescopically moved along the radial direction of the base plate base (1), and the base plate base (1) is clamped and fixed on the convex part (801) of the irregular boss (8) through the relative telescopic movement of the adjusting pins (102).

2. The hydraulic jack fixing device for irregular boss according to claim 1, wherein The number of the intermediate base plate (2) is determined by the height of the hydraulic jack base (7), the lifting stroke range, and the distance from the plane of the irregular boss (8) to the object to be lifted.

3. The hydraulic jack fixing device for irregular boss according to claim 1, wherein The adjusting pin (102) is needle-point type, and the adjusting pin (102) comprises a needle-point section, a threaded section and a non-threaded section from top to bottom, and the sidewall of the base plate base (1) is provided with an internal thread matched with the threaded section, so that the adjusting pin (102) is threadedly connected with the base plate base (1).

4. The hydraulic jack fixing device for irregular boss according to claim 1, wherein The top middle of the upper bracket (3) is further provided with an anti-skid groove which has a shape matched with the bottom of the hydraulic jack base (7).

5. A method of using a hydraulic jack fixture suitable for irregular protrusions, using the fixture of any one of claims 1-4, characterized in that, It comprises the following steps: S1, according to the size and position of the convex part (801) of the irregular boss (8) below the object to be lifted, select the appropriate fixing device, and determine the placement position of the base plate base (1); S2, measure the distance from the plane of the irregular boss (8) where the base plate base (1) is placed to the object to be lifted, and calculate the required number of intermediate base plates (2) according to the height of the hydraulic jack base (7) and the lifting stroke range; S3, the base plate base (1) is sleeved and installed on the convex part (801) of the irregular boss (8) through the through hole; and by adjusting the symmetrically arranged adjusting pins (102), the base plate base (1) is clamped and fixed on the convex part (801); S4, install the intermediate base plate (2) and the upper bracket (3) on the base plate base (1) from bottom to top, and place the hydraulic jack on the upper bracket (3); S5, start the hydraulic jack, so that the upper end face of the hydraulic jack is in contact with and bears the force of the object to be lifted, and the lifting work of the object to be lifted above the irregular boss (8) is completed. S6, remove the fixing device and hydraulic jack, and the construction is completed.

6. The method of using a hydraulic jack fixture for irregular protrusions of claim 5, wherein, The step S1 includes the following specific steps: S1-1, clean the irregular boss (8) below the object to be jacked up, and confirm the size and position of the protruding part (801) on the irregular boss (8); S1-2, according to the size of the protruding part (801) of the irregular boss (8), select a suitable fixing device to ensure that the inner edge of the through hole is not smaller than the outer edge of the protruding part (801); S1-3, at the same time, according to the position of the protruding part (801) of the irregular boss (8), determine the placement position of the base plate base (1), so that there is no obstacle in the range from the outer diameter of the base plate base (1) to the inner edge of the through hole.

7. The method of using a hydraulic jack fixture for irregular protrusions of claim 5, wherein, The step S3 includes the following specific steps: S3-1, the base plate base (1) is sleeved on the protruding part (801) of the irregular boss (8) through the through hole; S3-2, by adjusting the extension amount of the adjusting pin (102) in the radial direction of the base plate base (1), the symmetrically arranged adjusting pins (102) are respectively in contact with the protruding part (801), so that the base plate base (1) is clamped and fixed on the protruding part (801), and the installation of the base plate base (1) is completed.

8. The method of using a hydraulic jack fixture for irregular protrusions of claim 7, wherein, The bottom of the base plate base (1) is provided with a magnetic plate (101); In the step S3-1, after the base plate base (1) is sleeved on the protruding part (801) of the irregular boss (8), the magnetic plate (101) at the bottom of the base plate base (1) is used to preliminarily fix the base plate base (1).

9. The method of using a hydraulic jack fixture for irregular protrusions of claim 7, wherein, The non-threaded section of the adjusting pin (102) is provided with a scale line; In the step S3-2, in the process of adjusting the adjusting pin (102), the scale line of the non-threaded section of the adjusting pin (102) is also observed, so that the scale line readings of the two adjusting pins (102) symmetrically arranged on the side wall of the base plate base (1) are the same, and the tips of the needle tips are in contact with the protruding part (801) at the same time, so that the protruding part (801) is located at the center position of the through hole of the base plate base (1). The inner side wall of the top groove (4) of the base plate base (1) and the intermediate base plate (2) is provided with an internal thread, the outer side wall of the bottom convex (5) of the upper bracket (3) is provided with an external thread matched with the internal thread, and the top groove (4) and the bottom convex (5) are threadedly connected; The specific steps of the step S4 include:

10. The method of using a hydraulic jack fixture for irregular protrusions of claim 5, wherein, Through the top groove (4) and the bottom convex (5) matched in shape and internal and external threads, the intermediate base plate (2) and the upper bracket (3) are successively screwed and installed, the hydraulic jack base (7) is placed on the upper surface of the upper bracket (3), and the fixation of the hydraulic jack at the irregular boss (8) is completed. ​ ​

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