Disassembling and assembling device for flange end cover of inverted filter

Abstract

The invention particularly relates to an inverted filter flange end cover disassembling and assembling device which comprises an operation platform, a movable crane above the operation platform, stairs connected with the operation platform, a tool storage cabinet fixedly connected to the operation platform, circumferential rails and hoisting holes. The movable lifting platform, the hoisting hole gland, the hydraulic wrench terminal pneumatic lifting platform, the hydraulic wrench terminal and the multi-head hydraulic jack are arranged on the base; supporting columns are arranged at the bottom of the working platform, and fences are arranged around; upper and lower steps are arranged on the stairs; the movable lifting platform is used for placing the filter flange end cover, is connected with the movable crane to realize lifting and is in contact connection with the multi-head hydraulic jack to realize lifting; the top of the hydraulic wrench terminal pneumatic lifting platform is used for placing a hydraulic wrench terminal, and the bottom is slidably connected to the circumferential track to realize movement; and the hoisting hole glands are used for covering the hoisting holes. According to the invention, the flange end cover of the inverted filter can be quickly, efficiently and conveniently disassembled and assembled.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly and assembly of an inverted filter flange end cover, in particular to a disassembly and assembly device of an inverted filter flange end cover. Background Art

[0002] The inverted filter includes a filter body, a flange end cover installed on the top of the filter body, a drain pipe on the flange end cover, and a filter screen in the drain pipe. It is widely used in various industrial fields. When it is necessary to drain, open the drain pipe valve, and the impurities are discharged from top to bottom through the flange end cover and the drain pipe to the required designated location under the impact of the fluid and its own gravity. However, if the impurities are too large, they are easy to accumulate in the filter screen, which requires regular disassembly and assembly of the inverted filter to check the internal condition of the inverted filter and clean up large impurities.

[0003] The inverted filter is subjected to high fluid pressure and fast flow rate, which is often accompanied by high temperature and demanding environmental requirements. Therefore, the inverted filter needs to be resistant to high temperature and high pressure. In reality, the filter flange cover is heavy, the bolts are thick, and the bolt torque value is large. The torque value range of ordinary torque wrenches cannot be covered, and a hydraulic torque wrench is required to apply torque. Usually, inverted filters need to be frequently disassembled and assembled during the system debugging stage, and inverted filters need to be disassembled and assembled regularly during the system operation stage. At present, the disassembly and assembly of inverted filters mainly have the following disadvantages:

[0004] 1. Frequent scaffolding construction, huge cost. At present, the disassembly and assembly of inverted filters mainly involves scaffolding, which is built when in use and dismantled when not in use. However, inverted filters need to be frequently disassembled and assembled during actual use, and the accumulated scaffolding construction costs are huge.

[0005] 2. It is inconvenient for personnel to inspect and repair, and there is a risk of personnel falling during the operation. The inverted filter is generally located at a relatively high position, and the scaffolding erected is more than 2 meters. According to industrial safety requirements, operators need to wear safety belts. Operators wearing safety belts are prone to falling when going up and down the scaffolding. Wearing a safety belt on the scaffolding will restrain the operators and is not conducive to the normal development of work.

[0006] 3. There is a risk of falling objects on the working platform. If the operation is improper, the tools and filter components used in the operation process are likely to fall from the scaffolding working platform, and the falling objects are likely to cause casualties and equipment damage below.

[0007] 4. The torqueing process is inconvenient to operate and has high labor costs. There is a fluid pipeline directly above the inverted filter. When using a hydraulic wrench to torque the bolts, the height of the torque wrench and the sleeve exceeds the gap between the fluid pipeline and the upper end face of the filter flange end cover. In addition, due to the large diameter of the fluid pipeline, most of the bolts on the upper surface of the filter flange end cover cannot be torqued, and only the bolts on the lower end face of the filter flange end cover can be operated. When using a hydraulic wrench to torque the bolts on the lower end face of the filter flange end cover, due to the heavy terminal weight of the hydraulic wrench, it is usually necessary for two operators to lift it together. The torque of large bolts is generally applied at least 3 times, and the work is highly repetitive. In terms of task allocation, it is usually necessary to arrange multiple groups of people to work alternately.

[0008] 5. The need to build a hoist, support, and hoisting process puts high demands on the skill level of the operators. When disassembling and assembling the inverted filter flange, it is necessary to build a lifting hoist and support. The hoisting, unloading, and moving in the process require a high level of operator skills.

[0009] 6. During the disassembly and assembly process, in order to protect the sewage pipe, it is often necessary to remove the sewage pipe of the filter flange end cover in advance. Since the system usually contains high-temperature and high-pressure fluids, in order to reduce the leakage points of the sewage pipe, the downstream pipe connected to the filter flange end cover is often welded. In the process of removing or moving the sewage pipe, the workload of personnel is increased, the disassembly and assembly costs are increased, and the re-identification and verification points after the filter is disassembled and assembled are increased.

[0010] 7. During the disassembly process, the bolts and nuts of the filter flange end cover often have thread damage, which requires frequent replacement and is expensive.

[0011] 8. There is no place to store tools at the work site. Frequent disassembly and installation of filters requires frequent transportation of tools between the work site and the tools. Summary of the invention

[0012] The object of the present invention is to provide an inverted filter flange disassembly and assembly device to solve the above-mentioned problems existing in the existing inverted filter flange disassembly and assembly process, and to achieve rapid, efficient and convenient disassembly and assembly of the inverted filter flange end cover.

[0013] In order to achieve the above object, the present invention provides the following technical solutions:

[0014] An inverted filter flange end cover disassembly and assembly device is installed under the inverted filter, including a work platform, a mobile crane above the work platform, a staircase connected to the work platform, a tool storage cabinet fixedly connected to the work platform, a circumferential track and a lifting hole, a mobile lifting platform, a lifting hole gland, a hydraulic wrench terminal pneumatic lifting platform, a hydraulic wrench terminal and a multi-head hydraulic jack; a support column is provided at the bottom of the work platform, and a fence is provided around it; and up and down steps are provided on the staircase;

[0015] The tool storage cabinet is used to store and retrieve mobile lifting platforms, hydraulic wrench terminal pneumatic lifting platforms, hydraulic wrench terminals and multi-head hydraulic jacks; the top of the mobile lifting platform is used to place the filter flange end cover, the side is used to connect with the mobile crane to achieve lifting, and the bottom is used to contact and connect with the multi-head hydraulic jack placed on the working platform to achieve lifting; the top of the hydraulic wrench terminal pneumatic lifting platform is used to place the hydraulic wrench terminal, and the bottom is used for sliding connection on the circumferential track to achieve movement; the lifting hole pressure cover is used to cover the lifting hole.

[0016] As one possible implementation, the side of the mobile lifting platform is connected to a crane above the working platform.

[0017] As one of the feasible ways, bolt holes are symmetrically arranged on the side of the mobile lifting platform, and the mobile lifting platform is connected to the crane above the working platform through the bolt holes.

[0018] As one of the possible implementation methods, universal wheels are provided at the bottom of the mobile lifting platform.

[0019] As one of the feasible ways, a through groove matching with the filter flange end cover drain pipe is provided in the middle of the top of the mobile lifting platform, and grooves matching with the filter flange end cover lifting ears are symmetrically provided on both sides of the top through groove.

[0020] As one possible implementation, a separate support column is provided directly below the tool storage cabinet and the mobile lifting platform on the working platform.

[0021] As one of the feasible ways, the circumferential track is provided with a groove; and an arc track compensation block can be detachably installed in the gap of the circumferential track groove.

[0022] As one of the feasible ways, a lifting lug is detachably provided on the arc track compensation block.

[0023] As one of the feasible ways, the hydraulic wrench terminal pneumatic lifting platform includes a hydraulic wrench terminal placement platform, a spring assembly, a gas chamber, a three-way valve, a compressed air inlet pipe, a gas chamber exhaust pipe and a lifting platform base; the gas chamber is installed between the lifting platform base and the hydraulic wrench terminal placement platform, the spring assembly is installed on the hydraulic wrench terminal placement platform, and the gas chamber is respectively connected with the compressed air inlet pipe and the gas chamber exhaust pipe through the three-way valve; the bottom of the lifting platform base is a groove structure with rollers; the hydraulic wrench terminal is placed on the hydraulic wrench terminal placement platform.

[0024] As one possible implementation, a door is provided between the working platform and the stairs.

[0025] Beneficial technical effects of the present invention:

[0026] The inverted filter flange end cover disassembly and assembly device of the present invention realizes the rapid, efficient and convenient disassembly and assembly of the inverted filter flange end cover, avoids the frequent and repeated construction and removal of scaffolding in the previous filter flange end cover disassembly and assembly process, and saves construction costs.

[0027] The inverted filter flange end cover disassembly and assembly device of the present invention has a closed fence arranged around the working platform to ensure that workers and objects will not fall from the working platform during the operation.

[0028] The inverted filter flange end cover disassembly and assembly device of the present invention provides a working platform via stairs, the stairs are provided with gentle up and down steps, fences are provided around the working platform, and workers do not need to wear safety belts during the up and down working process, thereby eliminating the constraints caused by workers wearing safety belts during the working process.

[0029] The inverted filter flange end cover disassembly and assembly device of the present invention does not need to set up a hoist and a support for hoisting the filter flange end cover, and the lifting and lowering of the mobile lifting platform is achieved through a multi-head hydraulic jack.

[0030] The inverted filter flange end cover disassembly and assembly device of the present invention uses a hydraulic wrench terminal pneumatic lifting platform and a circumferential track to realize the movement and lifting of the hydraulic wrench terminal. The filter flange end cover bolts are torqued by the hydraulic wrench terminal, which greatly reduces the physical exertion of the operators. There is no need for multiple people to take turns to torque the filter flange end cover bolts, thereby reducing labor costs.

[0031] The inverted filter flange end cover disassembly and assembly device of the present invention has a tool storage cabinet on the working platform. Tools used in the working process can be stored in the tool storage cabinet and can be used at any time during the working process, thus achieving zero distance between tool storage and use and effectively avoiding the frequent reversal of tools.

[0032] The inverted filter flange end cover disassembly and assembly device of the present invention facilitates the up and down transportation of tools and filter flange end covers on the working platform. A lifting hole is arranged on the working platform, and the lifting hole is covered by a lifting hole pressure cover in a non-working situation, thereby preventing workers and objects from falling; in a working situation, when the tools and filter flange end covers need to be transported up and down, the lifting hole pressure cover is removed from the lifting hole, and the tools and filter flange end covers are hoisted by a mobile crane and passed through the lifting hole, thereby realizing the up and down transportation of the tools and filter flange end covers.

[0033] The inverted filter flange end cover disassembly and assembly device of the present invention is provided with a through groove matching the filter flange end cover sewage pipe in the middle of the top of the movable lifting platform, thereby avoiding interference with the filter flange end cover sewage pipe; grooves matching the filter flange end cover lifting ears are symmetrically provided on both sides of the top through groove, thereby avoiding interference with the filter flange end cover lifting ears; there is no need to remove the sewage pipe and the lifting ears on the filter flange end cover during operation.

[0034] The inverted filter flange end cover disassembly and assembly device of the present invention is a device for moving the top of the lifting platform to support and support the filter flange end cover, thereby avoiding or alleviating the force between the filter flange end cover bolts and nuts, protecting the connecting threads between the filter flange end cover bolts and nuts, extending the service life of the filter flange end cover bolts and nuts, and reducing the spare parts loss of the filter flange end cover bolts and nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the inverted filter flange end cover disassembly and assembly device of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the pneumatic lifting platform of the hydraulic wrench terminal;

[0037] Figure 3 This is a schematic diagram of the structure of the arc track compensation block.

[0038] In the figure, 1. tool storage cabinet; 2. slot; 3. mobile lifting platform; 4. circumferential track; 5. fence; 6. lifting hole; 7. lifting hole cover; 8. support column; 9. bolt hole; 10. upper and lower steps; 11. hydraulic wrench terminal pneumatic lifting platform; 111. hydraulic wrench terminal placement table; 112. spring assembly; 113. gas chamber; 114. three-way valve; 115. compressed air inlet pipe; 116. gas chamber exhaust pipe; 117. lifting platform base. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0040] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "top", "bottom", "above", "below", "outside", "inside", etc. 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] See also Figure 1 The present embodiment provides an inverted filter flange end cover disassembly and assembly device, which is installed under the inverted filter and includes a work platform, a mobile crane above the work platform, a staircase connected to the work platform, a tool storage cabinet 1, a circumferential track 4 and a lifting hole 6 fixedly connected to the work platform, a mobile lifting platform 3, a lifting hole gland 7, a hydraulic wrench terminal pneumatic lifting platform 11, a hydraulic wrench terminal and a multi-head hydraulic jack; a support column 8 is provided at the bottom of the work platform, and a fence 5 is provided around it; and up and down steps 10 are provided on the staircase;

[0043] The tool storage cabinet 1 is used for storing and accessing the mobile lifting platform 3, the hydraulic wrench terminal pneumatic lifting platform 11, the hydraulic wrench terminal and the multi-head hydraulic jack; the top of the mobile lifting platform 3 is used to place the filter flange end cover, the side is used to connect with the mobile crane to realize lifting, and the bottom is used to contact and connect with the multi-head hydraulic jack placed on the working platform to realize lifting; the top of the hydraulic wrench terminal pneumatic lifting platform 11 is used to place the hydraulic wrench terminal, and the bottom is used for sliding connection on the circumferential track 4 to realize movement; the lifting hole cover 7 is used to cover the lifting hole 6.

[0044] During the torqueing process of the filter flange end cover bolts, the hydraulic wrench terminal pneumatic lifting platform 11 moves to the position directly below any bolt of the filter flange end cover through the circumferential track 4. The fence 5 is a full-coverage type to prevent objects on the working platform from falling. The lifting hole 6 is used for the upper and lower lifting channel holes of the mobile lifting platform 3, the filter flange end cover, the hydraulic wrench terminal pneumatic lifting platform 11, the hydraulic wrench terminal and the multi-head hydraulic jack. The lifting hole pressure cover 7 is covered directly above the lifting hole 6 to prevent people and objects from falling; when objects need to be moved up and down through the lifting hole 6, the lifting hole pressure cover 7 is removed from the lifting hole 6. The support column 8 is used to support the working platform.

[0045] In this embodiment, as one of the feasible ways, the side of the mobile lifting platform 3 is connected to the crane above the working platform, a universal wheel is provided at the bottom, a through groove matching the filter flange end cover drain pipe is provided in the middle of the top, and grooves 2 matching the filter flange end cover lifting ears are symmetrically provided on both sides of the top through groove.

[0046] The filter flange end cover is provided with two lifting ears and a drain pipe, and the two lifting ears are symmetrically arranged. When the filter flange end cover is stored on the top of the mobile lifting platform 3, the filter drain pipe is inserted into the through groove in the middle of the top of the mobile lifting platform 3, and the lifting ears of the filter flange end cover are inserted into the grooves on both sides of the through groove at the top of the mobile lifting platform 3, so as to avoid interference between the top of the mobile lifting platform 3 and the filter flange end cover drain pipe and the lifting ears of the filter flange end cover during the storage of the filter flange end cover on the top of the mobile lifting platform 3. The bottom of the mobile lifting platform 3 is provided with universal wheels, which can be moved to any position of the working platform to avoid blocking the road at ordinary times, and can also be moved to the vicinity of the lifting hole 6 and hoisted to the ground platform by the crane above the working platform.

[0047] In this embodiment, as one of the feasible ways, bolt holes 9 are symmetrically arranged on the side of the mobile lifting platform 3 , and the mobile lifting platform 3 is connected to the crane above the working platform through the bolt holes 9 .

[0048] When the mobile lifting platform 3 needs to be hoisted from the work platform to the ground platform, the bolt holes 9 are connected to the lifting ears and lifting belts of the mobile crane to realize the lifting of the mobile lifting platform 3, thereby realizing the lifting of the filter flange end cover.

[0049] In this embodiment, as one of the feasible ways, a separate support column 8 is provided directly below the tool storage cabinet 1 and the mobile lifting platform 3 which bear greater force on the working platform.

[0050] In this embodiment, as one of the feasible ways, the circumferential track 4 is provided with a groove; an arc track compensation block is detachably installed in the gap of the groove of the circumferential track 4; and a lifting ear is detachably provided on the arc track compensation block.

[0051] In this embodiment, as one of the feasible ways, the hydraulic wrench terminal pneumatic lifting platform 11 includes a hydraulic wrench terminal placement platform 111, a spring assembly 112, a gas chamber 113, a three-way valve 114, a compressed air inlet pipe 115, a gas chamber exhaust pipe 116 and a lifting platform base 117; the gas chamber 113 is installed between the lifting platform base 117 and the hydraulic wrench terminal placement platform 111, the spring assembly 112 is installed on the hydraulic wrench terminal placement platform 111, and the gas chamber 113 is respectively connected with the compressed air inlet pipe 115 and the gas chamber exhaust pipe 116 through the three-way valve 114; the bottom of the lifting platform base 117 is a groove structure with rollers, which can be accurately moved and lifted to the position directly below any bolt of the filter flange end cover; the hydraulic wrench terminal is placed on the hydraulic wrench terminal placement platform 111, and the hydraulic wrench terminal placement platform 111 is lifted and lowered by pneumatic operation, which drives the hydraulic wrench terminal to rise and fall, without the need for multiple people to lift, and without the need for multiple people to take turns to work.

[0052] In this embodiment, as one of the feasible ways, a door is provided between the working platform and the stairs.

[0053] During non-working hours, the door between the working platform and the stairs is closed; during working hours, personnel open the door between the working platform and the stairs and enter the working platform.

[0054] When using the inverted filter flange disassembly and assembly device to disassemble the inverted filter flange end cover, the operator enters the working platform from the upper and lower steps 10, and takes out the mobile lifting platform 3, the hydraulic wrench terminal pneumatic lifting platform 11, the hydraulic wrench terminal and the multi-head hydraulic jack from the tool storage cabinet 1;

[0055] Use the mobile crane above the work platform to hoist the multi-head hydraulic jack to the bottom of the filter flange end cover on the work platform; connect the bolt hole 9 on the side of the mobile lifting platform 3 to the mobile crane above the work platform, and use the mobile crane above the work platform to hoist the mobile lifting platform 3 to the bottom of the filter flange end cover and make uniform contact with the head of the multi-head hydraulic jack; use the multi-head hydraulic jack to lift the mobile lifting platform 3 to the top to make contact with the filter flange end cover;

[0056] A hydraulic wrench terminal pneumatic lifting platform 11 is slidably connected to the circumferential track 4, a hydraulic wrench terminal is placed on the hydraulic wrench terminal pneumatic lifting platform 11, and the lifting and lowering of the hydraulic wrench terminal pneumatic lifting platform 11 is pneumatically controlled; the bolts and nuts of the filter flange end cover are removed under the joint action of the hydraulic wrench terminal, the hydraulic wrench terminal pneumatic lifting platform 11 and the circumferential track 4;

[0057] Depressurize the multi-head hydraulic jack, and take out the multi-head hydraulic jack after the pressure relief is completed; remove the hydraulic wrench terminal pneumatic lifting platform 11 from the circumferential track 4, install the arc track compensation block on the circumferential track 4, push the mobile lifting platform 3 together with the filter flange end cover out from under the filter, take out the filter screen, observe the foreign matter inside the filter screen and clean it.

[0058] The reinstallation process of the filter flange end cover is the opposite of the removal process of the filter flange end cover. The filter flange end cover bolts are torqued multiple times and diagonally in sequence as required.

[0059] After the operation is completed, the mobile lifting platform 3, the hydraulic wrench terminal pneumatic lifting platform 11, the hydraulic wrench terminal and the multi-head hydraulic jack are stored in the tool storage cabinet 1, and the lifting hole pressure cover 7 is covered directly above the lifting hole 6.

[0060] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An inverted filter flange end cover disassembly and assembly device, characterized in that: Installed below the inverted filter, it includes a work platform, a mobile crane above the work platform, a staircase connected to the work platform, a tool storage cabinet (1) fixedly connected to the work platform, a circumferential track (4) and a lifting hole (6), as well as a mobile lifting platform (3), a lifting hole gland (7), a hydraulic wrench terminal pneumatic lifting platform (11), a hydraulic wrench terminal and a multi-head hydraulic jack; a support column (8) is provided at the bottom of the work platform, and a fence (5) is provided around it; and upper and lower steps (10) are provided on the staircase; The tool storage cabinet (1) is used for storing and accessing a mobile lifting platform (3), a hydraulic wrench terminal pneumatic lifting platform (11), a hydraulic wrench terminal and a multi-head hydraulic jack; the top of the mobile lifting platform (3) is used for placing a filter flange end cover, the side is used for connecting with a mobile crane to achieve lifting, and the bottom is used for contacting and connecting with a multi-head hydraulic jack placed on a working platform to achieve lifting; the top of the hydraulic wrench terminal pneumatic lifting platform (11) is used for placing a hydraulic wrench terminal, and the bottom is used for sliding connection on a circumferential track (4) to achieve movement; the lifting hole pressure cover (7) is used to cover the lifting hole (6).

2. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: The side of the mobile lifting platform (3) is connected to the mobile crane above the working platform.

3. The inverted filter flange end cover disassembly and assembly device according to claim 2, characterized in that: Bolt holes (9) are symmetrically arranged on the side of the mobile lifting platform (3), and the mobile lifting platform (3) is connected to the mobile crane above the working platform through the bolt holes (9).

4. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: The bottom of the mobile lifting platform (3) is provided with universal wheels.

5. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: A through groove matching the filter flange end cover sewage pipe is provided in the middle of the top of the mobile lifting platform (3), and grooves (2) matching the filter flange end cover lifting ears are symmetrically provided on both sides of the top through groove.

6. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: A separate support column (8) is provided directly below the tool storage cabinet (1) and the mobile lifting platform (3) on the working platform.

7. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: The circumferential track (4) is provided with a groove; and an arc-shaped track compensation block can be detachably installed in the gap of the groove of the circumferential track (4).

8. The inverted filter flange end cover disassembly and assembly device according to claim 7, characterized in that: The arc track compensation block is detachably provided with a lifting lug.

9. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: The hydraulic wrench terminal pneumatic lifting platform (11) comprises a hydraulic wrench terminal placement platform (111), a spring assembly (112), a gas chamber (113), a three-way valve (114), a compressed air inlet pipe (115), a gas chamber exhaust pipe (116) and a lifting platform base (117); the gas chamber (113) is installed between the lifting platform base (117) and the hydraulic wrench terminal placement platform (111), the spring assembly (112) is installed on the hydraulic wrench terminal placement platform (111), and the gas chamber (113) is respectively connected to the compressed air inlet pipe (115) and the gas chamber exhaust pipe (116) through the three-way valve (114); the bottom of the lifting platform base (117) is a groove structure with rollers; the hydraulic wrench terminal is placed on the hydraulic wrench terminal placement platform (111).

10. The inverted filter flange end cover disassembly and assembly device according to claim 1, characterized in that: A door is installed between the working platform and the stairs.

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