Large transformer lifting maintenance platform

Abstract

The utility model relates to the technical field of transformer maintenance, and particularly discloses a lifting maintenance platform for a large transformer. The maintenance platform comprises two sets of stand columns arranged in parallel in the Z-axis direction, a folding supporting platform which is in sliding fit with the stand columns and ascends and descends in the Z-axis direction, a lifting mechanism installed on the stand columns and used for controlling the folding platform to ascend and descend in the Z-axis direction, and a non-return mechanism installed on the stand columns and used in cooperation with the folding supporting platform. According to the utility model, the problem that power-assisted lifting equipment such as electric or hydraulic lifting equipment cannot be erected during overhaul and maintenance operation of a large transformer in a narrow space is effectively solved, and the overhaul efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer maintenance, and more specifically, to a large transformer lifting and maintenance platform. Background Art

[0002] At present, in the power system, large transformer maintenance and repair work at high altitudes requires the construction of scaffolding, but it usually consumes a lot of manpower and material resources, and the construction, dismantling and transportation of the scaffolding takes a lot of time, and there are great risks of high-altitude operations;

[0003] Especially on the low-voltage side of large oil-immersed transformers, due to the small space, fire water pipes all around the transformer, and the ground being transformer oil pits and pebbles, electric or hydraulic lifting equipment cannot be set up. The erection, dismantling and removal of ordinary scaffolding requires a lot of time, and there are greater risks to staff safety and equipment damage. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a large transformer lifting and maintenance platform, which effectively solves the problem that electric or hydraulic lifting equipment cannot be set up for maintenance work in a narrow space of a large transformer, thereby greatly improving the maintenance efficiency;

[0005] The solution adopted by the utility model to solve the technical problem is:

[0006] on the one hand:

[0007] A large transformer lifting and maintenance platform comprises two groups of columns arranged in parallel along the Z-axis direction, a folding support platform slidably matched with the columns and lifted along the Z-axis direction, a lifting mechanism installed on the columns and used to control the lifting of the folding platform along the Z-axis direction, and a non-return mechanism installed on the columns and used in conjunction with the folding support platform.

[0008] In some possible implementations, in order to effectively achieve folding, the device is suitable for use in a small space;

[0009] The folding support platform comprises two groups of folding frames respectively slidably matched with two groups of uprights, and pedals installed on the two groups of folding frames; the folding frames are transmission-connected with the lifting mechanism.

[0010] In some possible implementations, in order to effectively lift the folding frame through the lifting mechanism;

[0011] The folding frame includes a sliding column which is transmission-connected to the lifting mechanism and slidably cooperates with the column, an articulated seat, a first card seat, a second card seat and a support which are arranged in sequence from top to bottom along the axial direction of the sliding column on the side of the sliding column away from the column, a support rod connected to the articulated seat at one end, and a diagonal brace which is connected to the support rod at one end and to the card seat at the other end during maintenance.

[0012] In some possible implementations, in order to make the lifting more stable and labor-saving;

[0013] The lifting mechanism comprises two groups of lifting components corresponding to the columns one by one and connected to the folding support platform in a transmission manner;

[0014] The lifting assembly includes a pulley installed on the top of the column, a rope connected to the folding support platform at one end and used in conjunction with the pulley, a winch installed on the column and connected to the other end of the rope, and a counterweight arranged on the rope and located on the side of the column away from the folding support platform.

[0015] In some possible implementations,

[0016] A U-shaped sliding groove is arranged on the column along the Z-axis direction, and the sliding column is located in the U-shaped sliding groove and slidably cooperates with the column.

[0017] In some possible implementations, in order to effectively avoid the folding support platform from sliding down after being lifted to a specified height;

[0018] The non-return mechanism includes a vertical rod assembly installed on the outside of the column and arranged along the Z-axis direction, a stopper connected to the vertical rod assembly at one end and extending into the U-shaped slide groove at the other end, a support seat arranged on the outside of the vertical rod assembly and sleeved on the outside of the vertical rod assembly, and a clamping plate used in conjunction with the vertical rod assembly and installed on the outside of the column;

[0019] The limiting members are in multiple groups and are arranged along the Z-axis direction, and the limiting members are hingedly matched with the columns.

[0020] In some possible implementations,

[0021] There are multiple groups of limit members, and the distance between two adjacent groups of limit members is greater than the length of the sliding column along the Z-axis direction.

[0022] In some possible implementations, in order to effectively limit the folding support platform through the limiting member to prevent it from sliding down;

[0023] The limiter comprises a connecting plate hinged to the vertical rod assembly at one end, a sleeve connected to the other end of the connecting plate, a rotating shaft installed on the outside of the column and sleeved in the sleeve, and a stopper plate connected to the sleeve at one end and extending into the U-shaped slide groove at the other end;

[0024] The rotating shaft is arranged along the Y-axis direction;

[0025] The angle formed by the connecting plate and the stop plate is an obtuse angle;

[0026] During maintenance, the stop plate is arranged horizontally, and the angle formed by the connecting plate and the horizontal plane is an acute angle.

[0027] In some possible implementations, in order to effectively realize the support of the sliding column by driving the stop plate to move through the vertical rod assembly;

[0028] The vertical rod assembly includes a vertical rod that is mounted in a support seat and slides in the Z-axis direction, an elastic member that is mounted outside the vertical rod and located above the support seat, and a limiting rod that is hinged to one end of the vertical rod away from the elastic member and is used in conjunction with a clamping plate.

[0029] In some possible implementations,

[0030] The limiting rod comprises a rod body and a protrusion arranged on the rod body;

[0031] The clamping plate is provided with a clamping slot used in conjunction with the rod body.

[0032] The working principle includes the following steps:

[0033] Step S1: the folding support platform is opened, and materials and / or maintenance personnel are carried on the folding support platform;

[0034] Step S2: The lifting mechanism controls the folding support platform to be lifted along the Z-axis direction;

[0035] Step S3: After the folding support platform is lifted to the specified position, the non-return mechanism is opened to support the folding support platform and restrict the folding support platform from sliding downward for maintenance;

[0036] Step S4: After the inspection is completed, the non-return mechanism is retracted, and the lifting mechanism controls the folding support platform to descend to the initial position along the Z-axis direction;

[0037] Step S5: the folding support platform is folded, and the support rod is transformed from a horizontal state to a Z-axis direction state; the use is completed;

[0038] Before the lifting mechanism lifts the folding support platform, counterweight is applied according to the weight of the material and the folding support platform, so that the weight of the counterweight block is equal to the sum of the weight of the material and the folding support platform;

[0039] During lifting, the winch control rope is wound around the winch, driving the counterweight to descend and above the folding support platform; during the lifting process of the folding support platform, the elastic member is in a compressed state, and the top of the protrusion abuts against the bottom of the seat;

[0040] After the folding support platform is lifted to the specified position, the control protrusion is located between the card plate and the support seat, the top of the protrusion is no longer abutted against the card seat, the elastic member returns to its initial state, and the stop plate is horizontally arranged and located on the folding support platform. The folding support platform will support the bottom of the folding support platform and limit the folding support platform from sliding downward.

[0041] Compared with the prior art, the utility model has the following beneficial effects:

[0042] The utility model can effectively realize the lifting of materials and / or people in a narrow space to achieve the maintenance of the transformer;

[0043] The utility model realizes the lifting of the folding support platform through the lifting mechanism formed by the winch, rope, pulley and counterweight, which effectively solves the problem of lifting in a narrow space where electric or hydraulic power lifting equipment cannot be set up;

[0044] Compared with the floor-standing scaffolding, the utility model greatly reduces the erection time and improves the maintenance efficiency; it can also effectively ensure good general and inspection space;

[0045] The utility model has a simple structure and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0047] Figure 2 It is a structural schematic diagram of the lifting component in the utility model;

[0048] Figure 3 This is a structural schematic diagram of the folding frame of the utility model in an unfolded state;

[0049] Figure 4 This is a structural schematic diagram of the folding frame of the utility model in a folded state;

[0050] Figure 5 This is a schematic diagram of the structural relationship between the folding frame of the utility model and the upright column when the folding frame is in the unfolded state;

[0051] Figure 6 It is a structural schematic diagram of the vertical rod, elastic member, support seat, limit member and pulley in the utility model;

[0052] Figure 7 It is a structural schematic diagram of the vertical rod, the limiting member and the limiting rod in the utility model;

[0053] Figure 8 This is a schematic diagram of the structure of the utility model when the stop baffle supports the sliding column;

[0054] Fig. 9 This is a schematic diagram of the structure of the utility model when the stop baffle is retracted;

[0055] Fig.10 This is a schematic diagram of the positional relationship between the two when the stop baffle supports the sliding column of the utility model;

[0056] Fig.11 This is a schematic diagram of the position relationship between the stop baffle and the sliding column when the stop baffle is retracted;

[0057] Among them: 1-column, 2-folding support platform, 21-folding frame, 211-sliding column, 212-hinge seat, 213-seat one, 214-seat two, 215-support, 216-support rod, 217-diagonal support, 3-lifting assembly, 31-pulley, 32-rope, 33-winch, 34-counterweight, 4-check mechanism, 41-vertical rod assembly, 411-vertical rod, 412-elastic member, 413-support seat, 414-card, 42-limiting member, 421-connecting plate, 422-sleeve, 423-stop plate, 43-limiting rod, 431-rod body, 432-protrusion. DETAILED DESCRIPTION

[0058] In the present utility model, 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 body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity limit, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can indicate: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0059] The utility model is described in detail below.

[0060] like Figure 1-Figure 11 As shown:

[0061] on the one hand:

[0062] A large transformer lifting and maintenance platform, comprising two groups of columns 1 arranged in parallel along the Z-axis direction, a folding support platform 2 which is slidably matched with the columns 1 and lifted along the Z-axis direction, a lifting mechanism installed on the columns 1 and used to control the lifting of the folding platform along the Z-axis direction, and a non-return mechanism 4 installed on the columns 1 and used in conjunction with the folding support platform 2;

[0063] Before maintenance, the folding support platform 2 is opened and in a horizontal state, and goods and / or people are loaded on the folding support platform 2;

[0064] The folding support platform 2 and the goods and / or people carried thereon are lifted to a designated position along the Z-axis direction by the lifting mechanism, and then the non-return mechanism 4 supports the bottom of the folding support platform 2 to prevent the folding support platform 2 from sliding down during the maintenance process;

[0065] Then the overhaul was carried out;

[0066] After the inspection is completed, the folding support platform 2 is lowered to the initial position, and then the folding support platform 2 is folded to make it vertical (arranged along the Z-axis direction), thereby meeting the needs of retrieval operations in a narrow space.

[0067] In some possible implementations, in order to effectively achieve folding, the device is suitable for use in a small space;

[0068] The folding support platform 2 includes two groups of folding frames 21 that are slidably matched with the two groups of columns 1, and pedals installed on the two groups of folding frames 21; the folding frames 21 are transmission-connected to the lifting mechanism;

[0069] The two sets of folding frames 21 are connected to a lifting mechanism, and are lifted and lowered under the action of the lifting mechanism. When the two sets of folding frames 21 are unfolded, the pedals can be detachably mounted on the two sets of folding frames 21. When the two sets of folding frames 21 are unfolded, their top surfaces are on the same horizontal plane and serve as the supporting surface of the pedals.

[0070] Furthermore, a fence is provided on the pedal; the fence can be set according to usage requirements to effectively improve safety during the lifting process.

[0071] In some possible implementations, in order to effectively lift the folding frame 21 through the lifting mechanism;

[0072] like Figure 3 , Figure 4As shown, the folding frame 21 includes a sliding column 211 which is transmission-connected with the lifting mechanism and slidably cooperates with the column 1, a hinge seat 212, a clamping seat 1 213, a clamping seat 214 and a support 215 which are arranged in sequence from top to bottom along the axial direction of the sliding column 211 on the side of the sliding column 211 away from the column 1, a support rod 216 connected to the hinge seat 212 at one end, and a diagonal brace 217 connected to the support rod 216 at one end and connected to the clamping seat at the other end during maintenance;

[0073] The hinge seat 212 is used for hinge connection between the support rod 216 and the sliding column 211, and is arranged on the upper part of the sliding seat. The support 215 is used to connect the support rod 216 and the sliding column 211 again by connecting one end of the diagonal brace 217 to the support 215 and the other end to the support rod 216 when the support rod 216 is in a horizontal state, so as to form a folding frame 21 with a triangular structure.

[0074] like Figure 3 , Figure 4 As shown, the first clamping seat 213 and the second clamping seat 214 are arranged between the hinge seat 212 and the support 215; they are used to fix the diagonal brace 217 and the support rod 216 when the folding support platform 2 is in the folded state. At this time, the diagonal brace 217 is fixed by the first clamping seat 213 and the second clamping seat 214, and the support rod 216 is fixed by the hinge seat 212 and the support 215; in the folded state, the axial direction of the support rod 216 and the diagonal brace 217 will be arranged along the Z-axis direction;

[0075] Specifically, after the inspection is completed, the pedal is removed; then the diagonal brace 217 is removed, and the support rod 216 is rotated around the hinge point between the support rod 216 and the sliding column 211, so that the support rod 216 is changed from a horizontal state to a vertical state (along the Z-axis direction) and the support rod 216 is fixed to the support 215 by bolts, and then the diagonal brace 217 is fixed by the clamping seat 1 213 and the clamping seat 214; in this way, when not under inspection, the space occupied by the device is small, which can meet the needs of other settings or personnel passing through this position; compared with the prior art, the device does not need to be dismantled when in use, and is set up again when in use, which greatly reduces the safety risks and equipment damage risks during the erection and dismantling of ordinary scaffolding;

[0076] In some possible implementations, in order to make the lifting more stable and labor-saving;

[0077] The lifting mechanism comprises two groups of lifting components 3 corresponding to the columns 1 one by one and connected to the folding support platform 2 in a transmission manner;

[0078] The lifting assembly 3 includes a pulley 31 installed on the top of the column 1, a rope 32 connected to the folding support platform 2 at one end and used in conjunction with the pulley 31, a winch 33 installed on the column 1 and connected to the other end of the rope 32, and a counterweight 34 arranged on the rope 32 and located on the side of the column 1 away from the folding support platform 2;

[0079] The winch 33 is a manual winch 33, which is provided with a reel for releasing and recovering the rope 32, thereby achieving the lifting or lowering control of the folding support platform 2;

[0080] The counterweight 34 includes a counterweight cylinder arranged on the rope 32 and a counterweight block loaded in the counterweight cylinder. When lifting, the weight of the counterweight 34 is first set to be equal to the weight of the folding support platform 2 and the goods and / or maintenance personnel carried thereon by selecting a suitable counterweight block; in this way, when other operators control the winch 33, they only need to provide a small force to drive the lifting of the folding support platform 2, that is, the goods stacked thereon, so that it is convenient to lift a large weight with a small force and realize fully balanced lifting;

[0081] During lifting, the operator retracts the rope 32, drives the counterweight 34 downward, and controls the folding support platform 2 to rise; otherwise, the folding support platform 2 is lowered;

[0082] In some possible implementations,

[0083] A U-shaped slide groove is provided on the column 1 along the Z-axis direction, and the sliding column 211 is located in the U-shaped slide groove and slidably cooperates with the column 1;

[0084] Furthermore, there are two groups of U-shaped chutes, which are symmetrically arranged. The sliding column 211 is installed in one group of U-shaped chutes, and the counterweight cylinder and the winch 33 are located in the other group of U-shaped chutes.

[0085] In some possible implementations, in order to effectively prevent the folding support platform 2 from sliding down after being lifted to a specified height;

[0086] As 5- Fig. 9 As shown, the non-return mechanism 4 includes a vertical rod assembly 41 installed on the outside of the column 1 and arranged along the Z-axis direction, a stopper 42 connected to the vertical rod assembly 41 at one end and extending into the U-shaped slide groove at the other end, a support seat 413 arranged on the outside of the vertical rod assembly 41 and sleeved on the outside of the vertical rod assembly 41, and a clamping plate 414 used in conjunction with the vertical rod assembly 41 and installed on the outside of the column 1;

[0087] The limiting members 42 are multiple groups and are arranged along the Z-axis direction, and the limiting members 42 are hingedly matched with the column 1;

[0088] In some possible implementations,

[0089] There are multiple groups of the limiting members 42, and the distance between two adjacent groups of limiting members 42 is greater than the length of the sliding column 211 along the Z-axis direction;

[0090] The limiting members 42 are arranged in multiple groups, which can meet the requirements of the folding support platform 2 being able to meet the requirements of lifting at multiple positions; by limiting the distance between two adjacent groups of limiting members 42, other limiting members 42 that do not support the folding support platform 2 will not affect the normal use of the device; when one group of limiting members 42 supports the bottom of the sliding column 211, the other group is located above the top of the sliding column 211 and will not interfere with the sliding column 211;

[0091] In some possible implementations, in order to effectively limit the folding support platform 2 by the limiting member 42 to prevent it from sliding down;

[0092] The stopper 42 includes a connecting plate 421 hinged to the vertical rod assembly 41 at one end, a sleeve 422 connected to the other end of the connecting plate 421, a rotating shaft installed on the outside of the column 1 and sleeved in the sleeve 422, and a stopper plate 423 connected to the sleeve 422 at one end and extending into the U-shaped slide groove at the other end;

[0093] The rotating shaft is arranged along the Y-axis direction;

[0094] The angle formed by the connecting plate 421 and the stop plate 423 is an obtuse angle. Fig.10 Angle A in

[0095] During maintenance, the stop plate 423 is arranged horizontally, and the angle formed by the connecting plate 421 and the horizontal plane is an acute angle;

[0096] In some possible implementations, in order to effectively realize the support of the sliding column 211 by driving the stop plate 423 to move through the vertical rod assembly 41;

[0097] The vertical rod assembly 41 includes a vertical rod 411 which is mounted inside a support seat 413 and slides in the Z-axis direction, an elastic member 412 which is mounted outside the vertical rod 411 and located above the support seat 413, and a limiting rod 43 which is hinged to one end of the vertical rod 411 away from the elastic member 412 and cooperates with a clamping plate 414;

[0098] The elastic member 412 is mounted on the uppermost support seat 413 and is sleeved on the outer side of the vertical rod 411, and is connected with the vertical rod 411 to form a whole. When the vertical rod 411 descends, the elastic member 412 is in a compressed state. The elastic member 412 is a spring or a compression spring.

[0099] The limiting rod 43 is located to limit the rotation position of the stop plate 423 so that it can be effectively retracted and support the sliding column 211 above it.

[0100] In some possible implementations,

[0101] like Figure 8 , Fig. 9 As shown, the limiting rod 43 includes a rod body 431 and a protrusion 432 arranged on the rod body 431;

[0102] The clamping plate 414 is provided with a clamping slot for use with the rod body 431;

[0103] The rod body 431 is hinged to the bottom of the vertical rod 411 through a hinge seat and can rotate around the hinge point; since the vertical rod 411 can move along the Z-axis direction, the rod body 431 and the protrusion 432 can move along the Z-axis direction, and the hinged setting can make the top of the protrusion 432 abut against the bottom of the slot;

[0104] like Figure 8-Figure 11 As shown, before lifting, the bottom of the sliding column 211 will be on the stop plate 423 located below it and supported by the stop plate 423;

[0105] When lifting, the lifting mechanism first lifts the sliding column 211 to lift the folding support platform 2, then the rod body 431 is rotated around the hinge point and taken out of the slot, and at the same time a downward force is applied to the rod body 431, so that the protrusion 432 moves downward and is located under the card plate 414, and the elastic member 412 is in a compressed state due to the downward force applied by the vertical rod 411; then the rod body 431 is inserted into the slot, the top surface of the protrusion 432 will abut against the bottom of the card plate 414, and the vertical rod 411 moves downward to drive the stop plate 423 to flip up. , so that all stop plates 423 will not interfere with the sliding column 211; by controlling the vertical rod 411 to move downward, the sleeve 422 is driven to move counterclockwise around the rotating shaft, so that the stop plate 423 also moves counterclockwise and turns outward; when the stop plate 423 abuts against the column 1, the top surface of the protrusion 432 will abut against the bottom of the card seat, and at this time, the end of the stop plate 423 away from the sleeve 422 is coplanar with the inner side surface of the U-shaped slide groove, so that during the lifting process, the stop plate 423 will not interfere with the sliding column 211, resulting in ineffective lifting;

[0106] After being lifted to the specified position, the rod body 431 is controlled in the reverse direction so that the protrusion 432 is located between the card seat and the support seat 413 adjacent to the card seat, and the elastic member 412 returns to its initial state, driving the vertical rod 411 to move upward, and the sleeve 422 rotates clockwise, driving the stop plate 423 to rotate clockwise; when the stop plate 423 is in a horizontal state, the top surface of the hinge seat for connecting the rod body 431 and the vertical rod 411 contacts and abuts against the bottom of the support seat 413, and at this time, the stop block located under the sliding column 211 will block the sliding column 211 from sliding downward, preventing the sliding column 211 from driving the folding support platform 2 to slide down along the Z-axis direction;

[0107] Furthermore, the column 1 is an H-shaped steel structure, and a mounting plate for mounting the pulley 31 is arranged on the top thereof; a groove formed by the H-shaped steel is slidably matched with the sliding column 211, and the counterweight 34 and the winch 33 are located in another set of grooves, and one end of the rope 32 is connected to the winch 33, and the other end of the rope 32 is connected to the top of the sliding column 211 after being wound around the pulley 31;

[0108] There are two groups of check mechanisms 4 arranged on each group of columns 1, and they are symmetrically arranged; the stop plates 423 in the two groups of check mechanisms 4 are used in conjunction with the bottom of the sliding column 211 to make the support more stable and reliable; when the column 1 is an H-shaped steel, the two groups of flange plates of the H-shaped steel arranged on the check mechanism 4 are provided with through holes on the column 1 for the stop plates 423 to pass through;

[0109] Furthermore, a through hole is provided on the column 1, and a pin hole used in conjunction with the through hole is provided on the sliding column 211. After the folding support platform 2 is lifted to the specified position, one end of the pin passes through the through hole and is inserted into the pin hole, thereby locking the folding support platform 2 and the column 1, thereby further avoiding the possibility of the folding support platform 2 sliding down.

[0110] on the other hand:

[0111] A method for using the large transformer lifting and maintenance platform described above specifically comprises the following steps:

[0112] Step S1: The foldable support platform 2 is opened and arranged horizontally, and materials and / or maintenance personnel are carried on the foldable support platform 2; specifically:

[0113] The support rod 216 is opened and arranged horizontally, and the diagonal brace 217 connects the support rod 216 and the support 215;

[0114] Mount the pedal on the support rod 216;

[0115] Supplies and / or maintenance personnel are carried on the running board;

[0116] Step S2: The lifting mechanism controls the folding support platform 2 to be lifted along the Z-axis direction; specifically:

[0117] According to the total weight G of the folding support platform 2, materials and / or maintenance personnel, adjust the weight H of the counterweight block in the counterweight cylinder so that the total weight G = weight H;

[0118] Before lifting, the non-return mechanism 4 is in an open state, wherein the elastic member 412 is in a compressed state, and the bottommost stop plate 423 is under the sliding column 211 located in the initial position and supports the sliding column 211;

[0119] The folding support platform 2 is lifted, the winch 33 retracts the rope 32, and the rope 32 is wound around the reel of the winch 33, and the counterweight 34 moves toward the side close to the winch 33, and at the same time, the folding support platform 2 is lifted upward;

[0120] During the lifting process, the stop plate 423 moves counterclockwise and flips upward under the drive of the vertical rod 411, and the non-return mechanism 4 is retracted to avoid interference with the upwardly lifted sliding column 211;

[0121] Step S3: After the folding support platform 2 is lifted to the specified position, the non-return mechanism 4 is opened to support the folding support platform 2, restricting the folding support platform 2 from sliding downward for maintenance; specifically:

[0122] The control rod body 431 is not engaged with the clamping plate 414, and the elastic member 412 will recover from the compressed state to the initial state, driving the vertical rod 411 to move upward, and the hinge seat for connecting the rod body 431 and the vertical rod 411 will also move upward and abut against the support seat 413 above it;

[0123] When the vertical rod 411 moves upward, the sleeve 422 hinged to the outer side of the column 1 will move clockwise, so that the stop plate 423 seat moves clockwise, so that the stop plate 423 located below the sliding column 211 rotates and is located in the U-shaped sliding groove, acting as a limiting member to limit the sliding column 211 from sliding downward;

[0124] Step S4: After the inspection is completed, the non-return mechanism 4 is retracted, and the lifting mechanism controls the folding support platform 2 to descend to the initial position along the Z-axis direction;

[0125] Step S5: After use, remove the pedal, fold the folding frame 21, and transform the support rod 216 from a horizontal state to a Z-axis direction state; greatly increase the passage and inspection space, and ensure that the safe and stable operation of the transformer is not affected.

[0126] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A large transformer lifting and maintenance platform, characterized in that: The utility model comprises two groups of columns arranged parallel to each other along the Z-axis direction, a folding support platform which is slidably matched with the columns and lifted and lowered along the Z-axis direction, a lifting mechanism installed on the columns and used to control the lifting and lowering of the folding platform along the Z-axis direction, and a non-return mechanism installed on the columns and used in cooperation with the folding support platform.

2. A large transformer lifting and maintenance platform according to claim 1, characterized in that: The folding support platform comprises two groups of folding frames respectively slidably matched with two groups of uprights, and pedals installed on the two groups of folding frames; the folding frames are transmission-connected with the lifting mechanism.

3. A large transformer lifting and maintenance platform according to claim 2, characterized in that: The folding frame includes a sliding column which is transmission-connected to the lifting mechanism and slidably cooperates with the column, an articulated seat, a first card seat, a second card seat and a support which are arranged in sequence from top to bottom along the axial direction of the sliding column on the side of the sliding column away from the column, a support rod connected to the articulated seat at one end, and a diagonal brace which is connected to the support rod at one end and to the card seat at the other end during maintenance.

4. A large transformer lifting and maintenance platform according to claim 1, characterized in that: The lifting mechanism comprises two groups of lifting components corresponding to the columns one by one and connected to the folding support platform in a transmission manner; The lifting assembly includes a pulley installed on the top of the column, a rope connected to the folding support platform at one end and used in conjunction with the pulley, a winch installed on the column and connected to the other end of the rope, and a counterweight arranged on the rope and located on the side of the column away from the folding support platform.

5. A large transformer lifting and maintenance platform according to claim 3, characterized in that: A U-shaped sliding groove is arranged on the column along the Z-axis direction, and the sliding column is located in the U-shaped sliding groove and slidably cooperates with the column.

6. A large transformer lifting and maintenance platform according to claim 5, characterized in that: The non-return mechanism includes a vertical rod assembly installed on the outside of the column and arranged along the Z-axis direction, a stopper connected to the vertical rod assembly at one end and extending into the U-shaped slide groove at the other end, a support seat arranged on the outside of the vertical rod assembly and sleeved on the outside of the vertical rod assembly, and a clamping plate used in conjunction with the vertical rod assembly and installed on the outside of the column; The limiting members are in multiple groups and are arranged along the Z-axis direction, and the limiting members are hingedly matched with the columns.

7. A large transformer lifting and maintenance platform according to claim 6, characterized in that: There are multiple groups of limit members, and the distance between two adjacent groups of limit members is greater than the length of the sliding column along the Z-axis direction.

8. A large transformer lifting and maintenance platform according to claim 6, characterized in that: The limiter comprises a connecting plate hinged to the vertical rod assembly at one end, a sleeve connected to the other end of the connecting plate, a rotating shaft installed on the outside of the column and sleeved in the sleeve, and a stopper plate connected to the sleeve at one end and extending into the U-shaped slide groove at the other end; The rotating shaft is arranged along the Y-axis direction; The angle formed by the connecting plate and the stop plate is an obtuse angle; During maintenance, the stop plate is arranged horizontally, and the angle formed by the connecting plate and the horizontal plane is an acute angle.

9. A large transformer lifting and maintenance platform according to claim 7, characterized in that: The vertical rod assembly includes a vertical rod that is mounted in a support seat and slides in the Z-axis direction, an elastic member that is mounted outside the vertical rod and located above the support seat, and a limiting rod that is hinged to one end of the vertical rod away from the elastic member and is used in conjunction with a clamping plate.

10. A large transformer lifting and maintenance platform according to claim 9, characterized in that: The limiting rod comprises a rod body and a protrusion arranged on the rod body; The clamping plate is provided with a clamping slot used in conjunction with the rod body.

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