A lifting device

Abstract

The present application relates to the technical field of rail transit equipment maintenance and installation, and in particular to a sling used in the process of installing a power module into a frequency converter. The sling comprises a base frame (1), a set of clamping components (2) and a suspension beam (3). When the power module is lifted and installed into the frequency converter, a set of clamping arms (21) of the sling are first opened, and then the position of the sling is adjusted so that the power module is located between a set of clamping arms (21) of the sling, and then the set of clamping arms (21) are brought closer to each other and the power module is clamped. In this way, the lifting device is connected to the lifting part of the suspension beam (3) on the sling through a rope, and the sling and the frequency converter are lifted together to the position of the frequency converter cabinet door, which greatly improves the maintenance efficiency of the frequency converter and improves the safety during the maintenance process.

Description

Technical Field

[0001] The present application relates to the technical field of rail transit equipment maintenance and installation, and in particular to a lifting device used in the process of installing a power module into a frequency converter. Background Art

[0002] In high-speed trains, frequency converters are often used to control the rotation speed of motors. By adjusting the frequency of the motor, the train traction efficiency can be effectively improved, thereby achieving a higher train running speed. At the same time, the frequency converter can also realize the soft start and inversion functions of the motor, ensuring the smooth start and braking of the train. In the overhaul project of the frequency converter, the power module inside needs to be removed and repaired before being installed.

[0003] The weight of a power module is generally several hundred kilograms. It is difficult to complete the installation by manpower without the help of tools, and there are safety hazards. Summary of the invention

[0004] In view of this, the present application proposes a lifting device to improve the maintenance efficiency of the inverter.

[0005] In one embodiment of the sling provided in the present application, the sling includes a base frame, a set of clamping assemblies and a hanging beam. The base frame has a bottom beam and a column arranged on the bottom beam. The clamping assembly includes a group of openable clamping arms arranged on the bottom beam, and the relative inner sides of the group of clamping arms are each provided with a clamping portion, and the clamping portion is used to cooperate with an external module to be hoisted. The hanging beam is connected to the top of the column and extends in a direction perpendicular to the bottom beam, and a hanging portion is formed thereon for cooperating with an external lifting device.

[0006] The module to be hoisted in the above embodiment can be a power module. When the power module is hoisted and installed in the inverter, first open a set of clamping arms of the hoist, then adjust the position of the hoist so that the power module is located between a set of clamping arms of the hoist, and then bring the set of clamping arms closer to each other and clamp the power module. In this way, the hoisting device is connected to the hoisting part of the upper beam of the hoist through a rope, and the hoist and the inverter are lifted to the position of the inverter cabinet door. After pushing the power module into at least part of the cabinet of the inverter, the power module is fixed to the guide rail of the inverter box, and then the set of clamping arms of the hoist are opened and separated from the power module. In this way, through the cooperation of the hoist and the external hoisting device, the power module can be easily lifted to complete the installation, which greatly improves the maintenance efficiency of the inverter and improves the safety during the maintenance process.

[0007] In a preferred implementation of the sling provided in the above embodiment, the clamping assembly further includes two supports, a screw shaft, two moving blocks and two sets of limiting members. Among them, the two supports are respectively arranged at the two ends of the bottom beam. The two ends of the screw shaft are correspondingly rotatably arranged on the two supports, and the two ends of the screw shaft are provided with threads in opposite directions. A moving block is connected to one of the clamping arms, and the two moving blocks are respectively arranged at the two ends of the screw shaft and are both matched with the screw shaft threaded transmission. Two sets of limiting members are fixedly arranged on the bottom beam and are close to one side of the moving block so that the moving block can only translate along the screw shaft.

[0008] In a preferred implementation manner of the sling provided in the above embodiment, stop portions are further formed at both ends of the limiting member to limit the translation range of one of the moving blocks matched therewith.

[0009] In a preferred implementation manner of the sling provided in the above embodiment, a bearing is provided on the support, and the screw shaft passes through the bearing for connection.

[0010] In a preferred implementation manner of the sling provided in the above embodiment, the cross-section of the power input end of the screw shaft is polygonal and exposed outside the support.

[0011] In a preferred implementation manner of the sling provided in the above embodiment, the sling further includes a crank, one end of which is connected to the power input end.

[0012] In a preferred implementation manner of the sling provided in the above embodiment, the sling further comprises an electric device, and an output shaft of the electric device is connected to the power input end.

[0013] In a preferred implementation manner of the sling provided in the above embodiment, the sling beam is provided with a plurality of sling parts along its own length direction.

[0014] In a preferred implementation manner of the sling provided in the above embodiment, a lifting port is provided on the lifting beam, the length direction of the lifting port is along the length direction of the lifting beam, and a plurality of sharp teeth are arranged at intervals on the upper side wall of the lifting port, and the gap between two sharp teeth forms a lifting portion.

[0015] In a preferred implementation manner of the sling provided in the above embodiment, the sling further comprises a lifting ring, the lifting ring passes through the lifting opening and is sleeved on the lifting beam, and the thickness of the lifting ring is adapted to the lifting portion.

[0016] In a preferred implementation manner of the hanger provided in the above embodiment, the clamping portion includes at least one positioning pin.

[0017] In a preferred implementation manner of the sling provided in the above embodiment, the sling further comprises a fixing rope, one end of which is connected to the base frame, and the other end of which is used to connect to the module to be hoisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can better understand the above and other features and advantages of the present application. In the accompanying drawings:

[0019] Figure 1 This is a schematic structural diagram of an embodiment of the sling of the present application.

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the clamping assembly on the middle spreader.

[0021] The reference numerals are as follows:

[0022] 1-base frame; 11-bottom beam; 12-column;

[0023] 2-clamping assembly; 21-clamping arm; 22-positioning pin; 23-support;

[0024] 24-screw shaft; 241-power input end;

[0025] 25-moving block; 26-limiting member; 261-stop portion;

[0026] 27-crank handle;

[0027] 3-Lifting beam; 31-Lifting port; 311-Sharp teeth;

[0028] 4- Rings. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail with reference to the following embodiments.

[0030] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application. In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, "connection" should be understood in a broad sense, and can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] The frequency converter in the high-speed train can realize the soft start and inversion function of the motor, ensuring the smooth start and braking of the train. In the overhaul project of the frequency converter, the power module inside it needs to be removed for repair and then installed. The lifting device provided in this embodiment is used to facilitate the fixing of the power module during the lifting process.

[0032] Reference Figure 1 The sling provided in this embodiment includes a base frame 1, a set of clamping components 2 and a hanging beam 3. The base frame 1 has a bottom beam 11 and a column 12 arranged on the bottom beam 11. The clamping component 2 includes a group of openable clamping arms 21 arranged on the bottom beam 11, and the relative inner sides of the group of clamping arms 21 are all provided with clamping parts, and the clamping parts are used to cooperate with the external module to be hoisted. The hanging beam 3 is connected to the top of the column 12 and extends in a direction perpendicular to the bottom beam 11, and a hoisting part that cooperates with the external lifting device is formed thereon.

[0033] The module to be hoisted can be a power module. When the power module is hoisted and installed in the frequency converter, the group of clamp arms 21 of the hoist is first opened, and then the position of the hoist is adjusted so that the power module is located between the group of clamp arms 21 of the hoist, and then the group of clamp arms 21 are brought close to each other and the power module is clamped. In this way, the hoisting device is connected to the hoisting part of the upper beam 3 of the hoist through a rope, and the hoist is lifted together with the frequency converter to the position of the frequency converter cabinet door. After the power module is pushed at least partially into the cabinet of the frequency converter, the power module is fixed to the guide rail of the frequency converter box, and then the group of clamp arms 21 of the hoist are opened and separated from the power module. In this way, through the cooperation of the hoist and the external hoisting device, the power module can be easily lifted to complete the installation, which greatly improves the maintenance efficiency of the frequency converter and improves the safety during the maintenance process.

[0034] In a preferred embodiment, the hanging beam 3 can be provided with a plurality of lifting parts along its own length direction. In this way, according to the different weights of the modules to be hoisted, the lifting device can connect different lifting parts through ropes to maintain the balance of the modules to be hoisted. In a specific embodiment, a lifting port 31 is provided on the hanging beam 3, the length direction of the lifting port 31 is along the length direction of the hanging beam 3, and a plurality of sharp teeth 311 are provided at intervals on the upper side wall of the lifting port 31, and the gap between two sharp teeth 311 forms a lifting part. In this way, it is convenient to form a plurality of lifting parts, and to use different lifting parts to complete the lifting task. In addition, the lifting part can also be a lifting hole provided on the hanging beam.

[0035] In a further preferred embodiment, the sling may further include a lifting ring 4, which may pass through the lifting opening 31 and be mounted on the lifting beam 3, and the thickness of the lifting ring 4 is adapted to the lifting part. In this way, the lifting part at the balance point can be quickly found by simply clamping the lifting ring 4 on different lifting parts and conveniently trying.

[0036] In a further preferred embodiment, the clamping portion on the clamping arm 21 includes at least one positioning pin 22. When a group of clamping arms 21 clamp the power module, the positioning pin 22 can pass through the positioning holes on both sides of the power module, so that the positioning pin 22 clamps and lifts the power module, and facilitates the rotation of the power module to a position convenient for installation. Furthermore, a fixing rope can also be provided on the sling, one end of which is connected to the base frame 1, and the other end is used to connect the module to be hoisted. The fixing rope is used to temporarily connect the module to be hoisted with the base frame 1. In this way, when the power module is hoisted, after the power module is adjusted to a position by rotating around the positioning pin 22, one end of the fixing rope is connected to the base frame 1 of the sling, and the other end is connected to the power module, so that the power module and the sling can be temporarily fixed relative to each other. It should be noted that, depending on the type of the clamped module to be hoisted, the clamping portion can also be a convex portion or a concave portion of other shapes.

[0037] Combination Figure 1 and Figure 2In a preferred implementation of the sling of this embodiment, the clamping assembly 2 may also include two supports 23, a screw shaft 24, two moving blocks 25 and two sets of limiting members 26. Among them, the two supports 23 are respectively arranged at the two ends of the bottom beam 11. The two ends of the screw shaft 24 are correspondingly rotatably arranged on the two supports 23, and the two ends of the screw shaft 24 are provided with threads in opposite directions. A moving block 25 is connected to a clamp arm 21, and the two moving blocks 25 are respectively arranged at the two ends of the screw shaft 24 and are both threadedly matched with the screw shaft 24. The two sets of limiting members 26 are both fixedly arranged on the bottom beam 11 and are close to one side of the moving block 25, so that the moving block 25 can only translate along the screw shaft 24. In this way, since the threads at both ends of the screw shaft 24 are in opposite directions, when the screw shaft 24 rotates, it can drive a group of clamp arms 21 to move relative to or away from each other, so that a group of clamp arms 21 can be quickly opened and closed, and a group of clamp arms 21 can move at the same time, so that the clamp arms 21 can always be symmetrical relative to the base frame 1, which is also beneficial to maintaining the overall balance of the power module and the base frame 1.

[0038] In a further preferred embodiment, both ends of the limiting member 26 are further formed with stoppers 261 to limit the translation range of a moving block 25 that cooperates therewith. For example, the stoppers 201 may be bosses or ridges. In this way, by setting the translation range of the moving block 25 according to the specific use requirements of the sling, the opening and closing range of a group of clamp arms 21 can be limited, which can make the use of the sling more convenient.

[0039] In a further preferred embodiment, a bearing is provided on the support 23, and the screw shaft 24 is connected through the bearing. In this way, the screw shaft 24 can rotate more labor-savingly and smoothly.

[0040] In a preferred embodiment, the cross section of the power input end 241 of the screw shaft 24 is polygonal and exposed outside the support 23, so as to be connected to an external crank 27 or an output shaft of an electric device. Accordingly, the sling may further include a crank 27, one end of which is connected to the power input end 241. Alternatively, the sling may further include an electric device, the output shaft of which is connected to the power input end 241. For example, the electric device may include a motor and a reducer.

[0041] The present application relates to the technical field of rail transit equipment maintenance and installation, and in particular to a hoist used in the process of installing a power module into a frequency converter. The hoist includes a base frame 1, a set of clamping assemblies 2 and a suspension beam 3. When lifting and installing the power module into the frequency converter, first open a set of clamping arms 21 of the hoist, then adjust the position of the hoist so that the power module is located between a set of clamping arms 21 of the hoist, and then bring the set of clamping arms 21 closer to each other and clamp the power module. In this way, the lifting device is connected to the lifting part of the suspension beam 3 on the hoist through a rope, and the hoist is lifted together with the frequency converter to the position of the frequency converter cabinet door, which greatly improves the maintenance efficiency of the frequency converter and improves the safety during the maintenance process.

[0042] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The nouns and pronouns about people in this patent application are not limited to specific genders.

Claims

1. A sling, characterized in that: include: A base frame (1) has a bottom beam (11) and a column (12) arranged on the bottom beam (11); A clamping assembly (2) comprising a group of openable and closable clamping arms (21) arranged on the bottom beam (11), wherein the opposite inner sides of the group of clamping arms (21) are each provided with a clamping portion, and the clamping portion is used to cooperate with an external module to be hoisted; A hanging beam (3) is connected to the top end of the column (12) and extends in a direction perpendicular to the bottom beam (11), and is provided with a hanging portion for cooperating with an external hanging device.

2. The sling according to claim 1, characterized in that: The clamping assembly (2) further comprises: Two supports (23) are respectively arranged at two ends of the bottom beam (11); A screw shaft (24), the two ends of which are rotatably arranged on the two supports (23) respectively, and the two ends of the screw shaft (24) are provided with threads in opposite directions; Two moving blocks (25), one moving block (25) is connected to one of the clamping arms (21), and the two moving blocks (25) are respectively arranged at two ends of the screw shaft (24) and are both threadedly matched with the screw shaft (24); Two sets of limiting components (26) are both fixedly arranged on the bottom beam (11) and closely attached to one side of the moving block (25), so that the moving block (25) can only translate along the screw shaft (24).

3. The sling according to claim 2, characterized in that: Stop portions (261) are also formed at both ends of the limiting member (26) to limit the translation range of a moving block (25) matched therewith; or, The support (23) is provided with a bearing, and the screw shaft (24) passes through the bearing for connection.

4. The sling according to claim 2, characterized in that: The cross section of the power input end (241) of the screw shaft (24) is polygonal and exposed outside the support (23).

5. The sling according to claim 4, characterized in that: Also includes: a crank (27), one end of the crank (27) being connected to the power input end (241); or, An electric device, whose output shaft is connected to the power input end (241).

6. The sling according to claim 1, characterized in that: The hanging beam (3) is provided with a plurality of hanging parts along its own length direction.

7. The sling according to claim 6, characterized in that: The hanging beam (3) is provided with a hanging opening (31), the length direction of the hanging opening (31) is along the length direction of the hanging beam (3), and a plurality of sharp teeth (311) are arranged at intervals on the upper side wall of the hanging opening (31), and the gap between two sharp teeth (311) forms a hanging portion.

8. The sling according to claim 7, characterized in that: Also includes: A lifting ring (4) passes through the lifting opening (31) and is sleeved on the lifting beam (3), and the thickness of the lifting ring (4) is adapted to the lifting portion.

9. The sling according to claim 1, characterized in that: The clamping portion includes at least one positioning pin (22).

10. The sling according to claim 9, characterized in that: Also includes: A fixing rope, one end of which is connected to the base frame (1), and the other end of which is used to connect to the module to be hoisted.

Images