Lifting platform for installing current transformer

Abstract

The invention discloses a lifting platform for installing a current transformer. The lifting platform comprises a base; the slide rail bracket is vertically mounted on the base; the top connecting piece is installed on the top of the sliding rail support, and a hook is arranged on the top connecting piece; the lifting frame is installed on the sliding rail support in a sliding mode so that the lifting frame can slide up and down along the sliding rail support, and a lifting table is arranged on the lifting frame; and the driving mechanism is used for driving the lifting frame to slide up and down along the sliding rail bracket. According to the lifting platform, lifting of the current transformer is achieved so that installation of the current transformer can be achieved, the current transformer lifting platform is small in size, light in weight, convenient to move and convenient to use in a narrow space so as to facilitate maintenance, and a split structure is also convenient to carry and install.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power maintenance equipment, and in particular to a current transformer installation lifting platform. Background Art

[0002] Transformers are mainly used in metering systems and protection systems. As a part of the electric energy metering system, transformers work together with electric energy meters, concentrators and other instrumentation equipment to complete the metering of user electricity. As an important part of the relay protection system, they work together with overcurrent and overvoltage protection devices to complete the protection of main grid equipment. As a national mandatory measurement instrument, the error of the transformer is particularly important for the assessment and billing of electric energy, and plays the role of "weighing electricity". Its accuracy directly affects the accuracy of electric energy measurement.

[0003] With the rapid development of social economy, higher and higher requirements are put forward for the stable and economic operation of the power system. The traditional planned power outage maintenance can no longer meet the requirements of power development. The safe operation of substation equipment plays a vital role in the safe operation of the entire power grid system. Due to the normal aging of related equipment in the substation and the damage of related equipment caused by non-human reasons, the power supply cannot be normal, so the substation site needs to be frequently maintained, and there are strict requirements for related maintenance equipment. Different equipment is required for different lifting loads and lifting heights. Some equipment in the substation, such as 35KV current transformer, is relatively heavy, so special lifting equipment is required. Due to the particularity of the on-site maintenance environment of the substation, such as the complex on-site lines, numerous equipment, narrow width of some patrol roads, and often uncertain maintenance locations, if the damaged equipment needs to be replaced and repaired, it will bring certain difficulties, which may lead to the inability to repair in time, and even cause large-scale power outages, which brings more trouble to the power plant.

[0004] The existing aerial work platforms are basically large in size and heavy in weight, and can only be used for small-scale maintenance, which brings inconvenience to maintenance. For example, the existing lifting equipment is basically mounted on cars, which brings certain inconvenience to the lifting operation due to the restrictions of live equipment and complex terrain at the substation site. If it is necessary to repair damaged equipment in more complex terrain and deep corners, while ensuring that the lifting equipment can safely enter the work site, it is necessary to shut down all related live equipment that hinders the lifting operation, which will bring a lot of inconvenience and more economic losses to the enterprise, especially for the troubleshooting of sudden substation equipment, lifting and replacement, and installation and maintenance of indoor substation equipment. Summary of the invention

[0005] In view of the above shortcomings, the present invention provides a current transformer installation lifting platform, which can solve the problem that the existing current transformer lifting platform is large in size and heavy in weight and is not conducive to maintenance.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A current transformer installation lifting platform, comprising:

[0008] Base;

[0009] A slide rail bracket, which is vertically mounted on the base;

[0010] A top connecting piece, which is installed on the top of the slide rail bracket, and a hook is provided on the top connecting piece;

[0011] A lifting frame, which is slidably mounted on the slide rail bracket so as to be able to slide up and down along the slide rail bracket, and a lifting platform is provided on the lifting frame;

[0012] The driving mechanism is used to drive the lifting frame to slide up and down along the slide rail bracket.

[0013] Furthermore, the slide rail bracket is provided with two supporting feet, and the bottoms of the two supporting feet are provided with placement grooves;

[0014] The base is provided with two protrusions which can be inserted into the placement grooves at the installation positions corresponding to the two supporting legs of the slide rail bracket.

[0015] Furthermore, the lifting frame is provided with a plurality of limit pulley groups, each of which includes two limit pulleys arranged opposite to each other, a space for the support leg to pass through is formed between the two limit pulleys, and the limit pulley is supported on the support leg so as to be able to roll along the support leg.

[0016] Furthermore, the two supporting legs are connected to each other via a cross bar.

[0017] Further, the driving mechanism is a chain hoist;

[0018] A heavy-duty pulley is provided on the top connecting member, and a chain of the driving mechanism of the chain hoist passes through the heavy-duty pulley and is connected to the lifting frame.

[0019] Furthermore, the driving mechanism is a manual chain hoist, a diesel chain hoist or an electric chain hoist.

[0020] Furthermore, an alarm is installed on the top connecting piece, and a push-type normally open switch is provided at the bottom of the alarm. The normally open switch is located directly above the lifting frame, so that when the lifting frame slides upward to the top of the lifting platform and is flush with the top of the top connecting piece, the lifting frame touches and presses the normally open switch to cause the alarm to sound.

[0021] Furthermore, the alarm is installed on the top connecting member through a spring column.

[0022] Furthermore, foot cups are arranged on the four edges of the base.

[0023] Furthermore, running wheels are arranged on the four edges of the base.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the lifting platform of the present invention realizes the lifting of the current transformer to facilitate the installation of the current transformer. The current transformer lifting platform is small in size, light in weight, easy to move, and is conducive to use in narrow spaces for convenient maintenance. The split structure is also easy to carry and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0026] Figure 1 A schematic diagram of the structure of a current transformer installation lifting platform from one viewing angle of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the current transformer installation lifting platform of the present invention from another perspective;

[0028] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0029] Figure 4 It is a schematic diagram of the implementation of the current transformer installation lifting platform of the present invention.

[0030] Among them, the markings shown in the figure are: 10-base; 11-foot cup; 12-walking wheel; 20-slide rail bracket; 21-support foot; 22-cross bar; 30-top connecting piece; 31-hook; 32-heavy-load pulley; 40-lifting frame; 41-lifting platform; 42-limiting pulley; 50-driving mechanism; 60-alarm; 61-normally open switch; 62-spring column; 70-on-site transformer installation foundation; 71-channel steel. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment 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.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal connection 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. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Please refer to Figures 1 to 3 A preferred embodiment of the present invention provides a current transformer installation lifting platform, which mainly includes a base 10, a slide rail bracket 20, a top connecting piece 30, a lifting frame 40 and a driving mechanism 50.

[0035] The base 10 adopts an aluminum alloy base frame, and the overall structure is a horizontal rectangular frame, which serves as a supporting component of the entire lifting platform. The base 10 is made of aluminum alloy and has a certain strength to achieve support to avoid deformation and damage when the current transformer is lifted. The base 10 made of aluminum alloy has a small overall structure and a light weight, which is easy to carry. It is more suitable for carrying to the workplace for operation and is less affected by the site. In order to facilitate movement, walking wheels 12 are provided at the edges of the base 10. Specifically, walking wheels 12 are provided at the bottom of the four corners of the base 10 in a horizontal rectangular frame structure. The walking wheels 12 are universal wheels. By providing the walking wheels 12, the base 10 can be moved by dragging the base 10. The base 10 is provided with foot cups 11 at the edges thereof. There are multiple foot cups 11, which are arranged at the edges thereof. By adjusting the position of the foot cups 11 extending out of the base 10 to contact the ground, on the one hand, the base 10 can be kept stable and immovable by the contact between the foot cups 11 and the ground. On the other hand, by adjusting the extension of the foot cups 11 to keep in contact with the ground at the corresponding position, the base 10 can be stably placed on an uneven bottom surface, and the lifting platform and the transformer thereon can be prevented from tipping over due to the tilt of the base 10, thereby ensuring the safety of the operation. The base 10 only needs to support the upper parts, so its structure can be appropriately made smaller. Compared with the supporting parts of the current transformer hoisting platform in the prior art, its volume is smaller, its weight is lighter, and it is also easier to move.

[0036] The slide rail bracket 20 is vertically mounted on the base 10. The slide rail bracket 20 and the base 10 are detachably connected, that is, the two can be separated from each other when not in use, so as to facilitate carrying and storage when not in use, and can be assembled on site when in use. The slide rail bracket 20 is provided with two legs 21, and the two legs 21 are arranged parallel to each other and have the same length. The two legs 21 are connected to each other by a cross bar 22 to maintain the overall strength and stability of the slide rail bracket 20. The legs 21 and the cross bar 22 form the overall structure of the slide rail bracket 20. The legs 21 and the cross bar 22 are both made of aluminum alloy, that is, the slide rail bracket 20 made of aluminum alloy as a whole has reliable strength and is light in weight. The two legs 21 form a track for the lifting frame 40 to slide, and the lifting frame 40 can slide up and down along the two legs 21.

[0037] In a preferred embodiment, the bottoms of the two legs 21 are respectively provided with mounting grooves, and the base 10 is provided with two protrusions that can be inserted into the mounting grooves at the installation positions of the two legs 21 corresponding to the slide rail bracket 20. When assembling the slide rail bracket 20 and the base 10, the two legs 21 are inserted into the protrusions of the base 10 to form preliminary positioning and installation. Screw holes can also be provided on the two legs 21 and the protrusions of the base 10, and further tightening can be achieved by screwing in bolts.

[0038] The top connector 30 is installed on the top of the slide rail bracket 20. The top connector 30 and the slide rail bracket 20 can be detachably connected, that is, the two can be separated from each other when not in use, so that they are easy to carry and store when not in use, and can be assembled on site when in use. Of course, the top connector 30 can also be fixedly installed on the top of the slide rail bracket 20. Since the top connector 30 is small in size and light in weight, fixing the top connector 30 on the slide rail bracket 20 will not affect the movement of the slide rail bracket 20. In an exemplary embodiment of the present invention, the top connector 30 is installed on the top of the slide rail bracket 20 by bolts. If necessary, the bolts can be unscrewed to separate the top connector 30 and the slide rail bracket 20, so that they can be stored and moved separately, and can be assembled when in use. The top connector 30 is made of stainless steel and is flat as a whole. A hook 31 is fixedly arranged on one side of the top connector 30. The hook 31 adopts a 10mm thick stainless steel channel steel hook form. The hook 31 is used to hook the channel steel of the field transformer installation foundation when in use. The hook mouth of the hook 31 is facing downward to facilitate hooking from top to bottom, that is, when the top connecting piece 30 is fixedly installed on the top of the slide rail bracket 20, the slide rail bracket 20 is moved to hook the hook 31 from top to bottom on the channel steel of the field transformer installation foundation, and at the same time, the slide rail bracket 20 is inserted into the base 10 to achieve the connection and tightening of the slide rail bracket 20 and the base 10. Of course, considering the height error or uneven ground, at this time, the foot cup 11 can be adjusted, and the height of the base 10 can be adjusted at the same time, so that the overall height of the base 10, the slide rail bracket 20 and the top connecting piece 30 can adapt to the channel steel height of the field transformer installation foundation, so that the hook 31 is hung in the channel steel and the base 10 is placed stably on the ground.

[0039] The lifting frame 40 is slidably mounted on the slide rail bracket 20 so as to be able to slide up and down along the slide rail bracket 20, and a lifting platform 41 is provided on the lifting frame 40. The lifting frame 40 is made of aluminum alloy, and the lifting platform 41 is fixedly mounted on the side of the lifting frame 40 away from the field transformer installation foundation when in use. The lifting platform 41 is made of aluminum alloy as a whole, and the top part is on the top and extends in a direction away from the field transformer installation foundation, and is used to place the current transformer. In this exemplary embodiment, the lifting platform 41 extends 350mm in length, which is greater than the thickness of the 35Kv current transformer (280mm). The lifting platform 41 is lifted to the top to be flush with the top connector 30 and the hook 31 thereon, so as to facilitate translation.

[0040] The lifting frame 40 is provided with a plurality of limit pulley groups, each of which includes two limit pulley groups 42 arranged opposite to each other, and a space is formed between the two limit pulleys 42 for the support leg 21 to pass through, and the limit pulley 42 is held against the support leg 21 so as to be able to roll along the support leg 21. During implementation, the lifting frame 40 is first sleeved into the support leg 21, and then the slide rail bracket 20 is installed on the base 10. When the hook 31 is hooked on the channel steel of the field transformer installation foundation and the slide rail bracket 20 is installed on the base 10, the lifting frame 40 cannot go out from the upper and lower ends of the slide rail bracket 20 due to the limit at the upper and lower ends of the slide rail bracket 20, that is, the lifting frame 40 can be prevented from being separated from the slide rail bracket 20 during use to prevent safety accidents. The form of the limit pulley 42 clamping the support leg 21 oppositely can make the lifting frame 40 slide up and down along the slide rail bracket 20 more smoothly and steadily. There are four sets of limit pulleys, two on the top and two on the bottom, which not only ensures smooth sliding, but also ensures the load-bearing strength.

[0041] The driving mechanism 50 is used to drive the lifting frame 40 to slide up and down along the slide rail bracket 20. The driving mechanism 50 can be installed on the base 10 to move with the base 10 and be supported by the base 10. The driving mechanism 50 is a chain hoist. A heavy-duty pulley 32 is provided on the top connecting member 30. The chain (not shown in the figure) of the driving mechanism 50 of the chain hoist passes through the heavy-duty pulley 32 and is connected to the lifting frame 40. When the driving mechanism 50 of the chain hoist is wound up, it can pull the lifting frame 40 to slide upward along the slide rail bracket 20. When the chain is released, the lifting frame 40 can slide downward along the slide rail bracket 20 under the action of its own weight.

[0042] In a preferred embodiment, the driving mechanism 50 is a manual chain hoist, a diesel chain hoist or an electric chain hoist. The electric chain hoist is easy to use and can be used by taking electricity, while the manual chain hoist or the diesel chain hoist can be used for a long time when it is inconvenient to take electricity.

[0043] In a preferred embodiment, an alarm 60 is installed on the top connecting member 30, and a push-type normally open switch 61 is provided at the bottom of the alarm 60. When the push-type normally open switch 61 is contacted and pressed, the alarm 60 can be powered on and an alarm can be sounded and lighted, or one of sound or flashing lights can be used to alert the staff through the alarm.

[0044] The normally open switch 61 is located directly above the lifting frame 40 , so that when the lifting frame 40 slides upward to the top of the lifting platform 41 and is flush with the top of the top connecting member 30 , the lifting frame 40 touches and presses the normally open switch 61 to cause the alarm 60 to sound an alarm.

[0045] Considering that the lifting frame 40 is driven by the driving mechanism 50 to slide upward along the slide rail bracket 20, it is necessary to limit the upward sliding position of the lifting frame 40 to avoid damaging the top connecting piece 30, or even causing the lifting frame 40 to escape from the slide rail bracket 20, and it is difficult for the staff standing on the ground to observe whether the lifting frame 40 is lifted to the right position. Based on this, an alarm 60 is provided. When the driving mechanism 50 drives the lifting frame 40 to slide upward along the slide rail bracket 20 to a suitable position, the lifting frame 40 touches and presses the normally open switch 61. At this time, the alarm 60 can be powered on and an alarm is sounded. After the staff sees (or hears) the alarm, they turn off the driving mechanism 50 and keep the lifting frame 40 at a certain predetermined height.

[0046] In a preferred embodiment, the alarm 60 is mounted on the top connection member 30 via a spring column 62. If the alarm 60 is rigidly mounted on the top connection member 30, it may not be possible to shut down the driving mechanism 50 in time when an alarm is detected. If the shutdown is too slow, the normally open switch 61 may be damaged, and even the alarm 60 may be damaged. Therefore, the alarm 60 is mounted on the top connection member 30 via a spring column 62. The spring column 62 has a buffering effect. When the lifting frame 40 presses the normally open switch 61, it can play a certain buffering role to avoid damage to the normally open switch 61 and the alarm 60.

[0047] When implementing, the following is an exemplary implementation method, please refer to Figure 4, move the base 10 to the side of the field transformer installation foundation 70, adjust the foot cup 11 to keep the base 10 stable, assemble the top connector 30 to the top of the slide rail bracket 20, and hang it on the channel steel 71 of the field transformer installation foundation 70 through the hook 31, then assemble the top of the slide rail bracket 20 to the base 10, and adjust the foot cup 11 to ensure that the base 10 is placed stably on the ground, the current transformer is placed on the lifting platform 41 of the lifting frame 40, start the driving mechanism 50 to drive the lifting frame 40 to slide upward along the slide rail bracket 20, when the lifting frame 40 touches and presses the normally open switch 61, the alarm 60 is powered on and an alarm sounds, the staff shuts down the drive mechanism 50, and keeps the lifting frame 40 at a certain predetermined height. At this time, the lifting frame 40 is lifted to the highest point and level with the top connector 30, and the bottom of the current transformer is level with the top connector 30, so as to move toward the on-site transformer installation foundation 70. At this time, the lifting of the current transformer is completed; when the current transformer needs to be lowered, the current transformer is first placed on the lifting platform 41 of the lifting frame 40, and the drive mechanism 50 is started to drive the lifting frame 40 to slide downward along the slide rail bracket 20. When it slides almost close to the ground, the lowering of the current transformer is completed. In the above manner, the lifting platform of the present invention can be used to realize the lifting of the current transformer, so as to facilitate the installation of the current transformer. The current transformer hoisting platform is small in size, light in weight, easy to move, and is convenient for use in narrow spaces for easy maintenance. The split structure is also easy to carry and install, and the lifting is stable, which solves the installation problem of small equipment with compact spacing, and has great promotion and application value.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A current transformer installation lifting platform, characterized in that: Included are: Base (10); A slide rail bracket (20) vertically mounted on the base (10); A top connecting member (30) is installed on the top of the slide rail bracket (20), and a hook (31) is provided on the top connecting member (30); A lifting frame (40) is slidably mounted on the slide rail bracket (20) so as to be able to slide up and down along the slide rail bracket (20), and a lifting platform (41) is provided on the lifting frame (40); A driving mechanism (50) is used to drive the lifting frame (40) to slide up and down along the slide rail bracket (20).

2. The current transformer installation lifting platform according to claim 1, characterized in that: The slide rail bracket (20) is provided with two supporting feet (21), and the bottoms of the two supporting feet (21) are provided with placement grooves; The base (10) is provided with two protrusions capable of being inserted into the placement grooves at the installation positions corresponding to the two supporting legs (21) of the slide rail bracket (20).

3. The current transformer installation lifting platform according to claim 2, characterized in that: The lifting frame (40) is provided with a plurality of groups of limiting pulley assemblies, each group of limiting pulley assemblies comprises two limiting pulleys (42) arranged opposite to each other, a space for the support leg (21) to pass through is formed between the two limiting pulleys (42), and the limiting pulley (42) is supported on the support leg (21) so as to be able to roll along the support leg (21).

4. The current transformer installation lifting platform according to claim 2, characterized in that: The two supporting legs (21) are connected to each other via a cross bar (22).

5. The current transformer installation lifting platform according to claim 1, characterized in that: The driving mechanism (50) is a chain hoist; A heavy-load pulley (32) is provided on the top connecting member (30), and a chain of the driving mechanism (50) of the chain hoist passes through the heavy-load pulley (32) and is connected to the lifting frame (40).

6. The current transformer installation lifting platform according to claim 5, characterized in that: The driving mechanism (50) is a manual chain hoist, a diesel chain hoist or an electric chain hoist.

7. The current transformer installation lifting platform according to claim 1, characterized in that: An alarm (60) is installed on the top connecting member (30), and a push-type normally open switch (61) is arranged at the bottom of the alarm (60). The normally open switch (61) is located directly above the lifting frame (40), so that when the lifting frame (40) slides upward to the top of the lifting platform (41) and is flush with the top of the top connecting member (30), the lifting frame (40) touches and presses the normally open switch (61) to cause the alarm (60) to sound an alarm.

8. The current transformer installation lifting platform according to claim 7, characterized in that: The alarm (60) is mounted on the top connecting member (30) via a spring column (62).

9. The current transformer installation lifting platform according to claim 1, characterized in that: Foot cups (11) are arranged on the edges of the base (10).

10. The current transformer installation lifting platform according to claim 1, characterized in that: Travel wheels (12) are arranged on the four edges of the base (10).

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