Fixing device for transformer bushing installation

Abstract

The fixing device comprises a base disc, a hoisting mechanism, a clamping mechanism and a power mechanism, a sleeve hole is coaxially formed in the middle of the base disc, the sleeve hole penetrates through the base disc in the thickness direction of the base disc, and the diameter of the sleeve hole is larger than the outer diameter of a pipe sleeve to be installed; the hoisting mechanism is arranged on the base disc and used for being detachably connected with a hoisting rope; the clamping mechanism comprises a plurality of clamping arms, the clamping arms are in sliding connection with the base disc in the radial direction, and clamping jaws are arranged at the inner ends of the clamping arms and used for abutting against the outer wall of a to-be-installed pipe sleeve. And the power mechanism is arranged on the base disc and can enable all the clamping arms to synchronously and equivalently slide inwards or synchronously and equivalently slide outwards. The problems that in the vertical hoisting process of the transformer bushing, efficiency is low, safety is weak, manual intervention is excessively relied on, and stability is low can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer bushing installation, in particular to a fixing device for transformer bushing installation. BACKGROUND

[0002] In the process of transformer installation, the bushing as a key component needs to be vertically suspended and hoisted during installation, so the hoisting operation requires high precision and safety measures.

[0003] Currently, the hoisting safety measures of the bushing mainly adopt the following two ways: (1) U-shaped ring butt joint of two equal length hoisting belts four limbs hoisting: specifically, two equal length hoisting belts are used, connected by a U-shaped ring to form four limb hoisting points, evenly distribute the hoisting force, and ensure the balance of the bushing during lifting. The design aims to reduce local stress concentration and prevent the bushing from being damaged due to uneven stress.

[0004] (2) On the basis of the above way, auxiliary waist rope fixes the upper end of the bushing: specifically, during hoisting, an additional waist rope (usually a flexible bandage or rope) is used to bind the top area of the bushing to provide lateral stability. The role of the waist rope is to constrain the swing or tilt of the bushing during vertical lifting, reducing the risk of rollover.

[0005] The core idea of the above safety measures is to realize stable lifting in the vertical direction through the hoisting belt, and rely on the waist rope to compensate for lateral instability. In operation, the appropriate hoisting belt length and waist rope binding point need to be selected according to the specific size and weight of the bushing to ensure overall safety. Although the above safety measures are widely used in practice, they still have the following objective shortcomings and deficiencies: (1) Dependence on specific hoisting belt combination, increase work time: specifically, the traditional method requires the use of two equal length hoisting belts, which need to be accurately butt jointed through a U-shaped ring, which increases the complexity of preparation work. The operator must repeatedly adjust the hoisting belt length and configuration according to the size of the bushing, which not only consumes time, but also may cause delays due to site conditions restrictions (such as insufficient hoisting belt inventory or length mismatch). This dependence reduces the hoisting efficiency, especially in large transformer installation or emergency repair scenarios, the time cost increases significantly.

[0006] (2) Waist rope binding height depends on the operator's literacy, the risk is significant: Specifically, the use of waist rope is completely dependent on the experience and technical level of the operator. The binding position, tightness and real-time adjustment all require subjective judgment, lack of standardization or automatic control. Inexperienced operators may not bind tightly or choose inappropriate positions, resulting in waist rope failure; and during hoisting, the casing may generate lateral force due to wind, swaying or accidental collision, and if the waist rope is not adjusted in time, the casing is prone to roll over. This human factor introduces uncontrollable risks, endangering the safety of power grid equipment (such as casing damage, transformer damage) and on-site personnel.

[0007] (3) Overall safety is insufficient, and the risk of rolling over is high: Specifically, although the waist rope is designed to prevent rolling over, its nature as an auxiliary measure means that it cannot completely eliminate the risk. The center of gravity of the casing changes greatly during the upright process, and the waist rope only provides passive restraint and cannot dynamically respond to real-time conditions. Once the lateral force exceeds the restraining capacity of the waist rope, or the binding point slips, the casing may lose balance instantly. This risk is particularly prominent in complex environments (such as high-altitude work, narrow spaces or adverse weather), which can lead to serious accidents.

[0008] In summary, the above safety measures, although theoretically feasible, are inefficient, vulnerable in safety, overly dependent on manual intervention and low in stability in actual operation.

[0009] In view of this, the present application is proposed. SUMMARY

[0010] The purpose of the present application is to provide a fixing device for transformer bushing installation, which can solve the problems of low efficiency, weak safety, excessive dependence on manual intervention and low stability during the vertical hoisting process of the transformer bushing.

[0011] The present application is realized by the following technical solutions: A fixing device for transformer bushing installation, comprising: a base disc, a sleeve hole is coaxially opened in the middle of the base disc, the sleeve hole penetrates the base disc along the thickness direction of the base disc, and the diameter of the sleeve hole is greater than the outer diameter of the pipe sleeve to be installed; a hoisting mechanism, the hoisting mechanism is arranged on the base disc, and the hoisting mechanism is used for detachable connection with a lifting rope; a clamping mechanism, the clamping mechanism comprises a plurality of clamping arms, the clamping arms are slidably connected with the base disc along the radial direction, the inner end of the clamping arm is provided with a pawl, and the pawl is used for abutting with the outer wall of the pipe sleeve to be installed; a power mechanism, the power mechanism is arranged on the base disc, and the power mechanism can make all the clamping arms slide inward synchronously and by the same amount or slide outward synchronously and by the same amount.

[0012] In another preferred embodiment, the power mechanism comprises a synchronous ring, a plurality of racks and a rotating assembly; the synchronous ring is coaxially connected with the base disc for rotation, one side of the synchronous ring is provided with helical threads; the racks are engaged with the helical threads, the racks are slidingly connected with the base disc along the radial direction of the base disc; the rotating assembly is drivingly connected with the synchronous ring, the rotating assembly can rotate the synchronous ring; the clamping arms correspond to the racks one by one, the clamping arms are fixedly connected with the corresponding racks for sliding connection with the base disc.

[0013] In another preferred embodiment, the inner side wall of the base disc is inwardly excavated to form a circular annular rotating cavity, the cavity thickness of the rotating cavity is slightly greater than the thickness of the synchronous ring; the synchronous ring is rotationally arranged in the rotating cavity; one side of the base disc is provided with a sliding groove penetrating through along the thickness direction, the sliding groove penetrates through the base disc along the radial direction, the sliding groove corresponds to the racks one by one, the racks are embedded in the corresponding sliding grooves and slidingly connected with the corresponding sliding grooves, and the racks are engaged with the synchronous ring, the side of the racks away from the synchronous ring is fixedly connected with the corresponding clamping arms.

[0014] In another preferred embodiment, the inner side wall of the base disc is provided with a plurality of limiting stop pieces, the limiting stop pieces correspond to the clamping arms one by one and are arranged in overlap; the limiting stop pieces can partially close the cavity opening of the rotating cavity.

[0015] In another preferred embodiment, the rotating assembly comprises a rotating handle, a rotating shaft and an engagement mechanism; the rotating shaft is rotationally connected with the base disc, the rotating shaft is engaged with the synchronous ring through the engagement mechanism; the outer end of the rotating shaft is connected with the rotating handle.

[0016] In another preferred embodiment, the engagement mechanism is a worm gear mechanism; or, the engagement mechanism is a gear mechanism.

[0017] In another preferred embodiment, the outer wall of the synchronous ring is provided with a tooth ring, the engagement mechanism comprises an input gear and an output gear, the input gear is fixedly sleeved with the rotating shaft, the output gear is engaged with the input gear and the tooth ring.

[0018] In another preferred embodiment, the inner wall of the limiting stop piece is provided with a bearing, and the inner side wall of the synchronous ring is in contact with the bearing.

[0019] In another preferred embodiment, the hoisting mechanism comprises a plurality of lifting lugs or a plurality of lifting rings, the lifting lugs or the lifting rings are fixedly connected to the outer side wall of the base disc; the lifting lugs or the lifting rings are arranged in pairs, each pair of the lifting lugs or the lifting rings is located at the two ends of the same diameter.

[0020] In another preferred embodiment, the inner wall of the claw is arc-shaped, and the inner wall of the claw is paved with an elastic friction layer.

[0021] Compared with the prior art, the present application has the following advantages: The fixing device for transformer sleeve installation disclosed by the present application comprises a base disc, a sleeve hole is formed in the middle of the base disc, the diameter of the sleeve hole is larger than the outer diameter of the pipe sleeve to be installed, so that the base disc can be sleeved on the pipe sleeve to be installed; a clamping mechanism is arranged, the clamping mechanism comprises a plurality of clamping arms, the clamping arms are slidably connected with the base disc in the radial direction, and a claw is arranged at the inner end of each clamping arm, so that the claw can abut against the outer sidewall of the pipe sleeve to be installed by sliding the clamping arm inward; a power mechanism is arranged to provide power for the clamping arms and enable all the clamping arms to slide in the same direction and synchronously, so that all the claws can simultaneously and synchronously press the sidewall of the pipe sleeve to be installed in the radial direction inward, thereby fixing the base disc and the pipe sleeve to be installed; a hoisting mechanism is arranged on the base disc, so that the base disc can be connected with a crane through a lifting rope, thereby achieving vertical hoisting of the pipe sleeve to be installed by hoisting the base disc; the fixing device for transformer sleeve installation can effectively solve the problems of low efficiency, weak safety, excessive dependence on manual intervention and low stability in the vertical hoisting process of the transformer sleeve through the cooperation of the above-mentioned features. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings: Figure 1 A schematic view of the fixing device for transformer sleeve installation provided by the present application; Figure 2 A schematic view of the fixing device for transformer sleeve installation provided by the present application; Figure 3 A schematic view of the fixing device for transformer sleeve installation provided by the present application; Figure 4 A sectional view of the rotating cavity of the fixing device for transformer sleeve installation provided by the present application; Figure 5 A radial half-section view of the fixing device for transformer sleeve installation provided by the present application.

[0023] Markings in the drawings and corresponding names of parts: 10 - base disc; 11 - sleeve hole; 12 - sliding groove; 13 - limiting stop; 20 - clamping arm; 21 - claw; 30 - synchronous ring; 301 - helical thread; 31 - rack; 40 - rotating handle; 41 - rotating shaft; 50 - lifting ring. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "left", "right", "inner", "outer", "front", "back", "transverse", "vertical" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] It should be particularly pointed out that "horizontal" and "vertical" in the present application are used to illustrate the approximate positional relationship, rather than a strict "horizontal plane" or "vertical plane". EMBODIMENT

[0027] Please refer to Figures 1 to 5 The present embodiment provides a fixing device for transformer bushing installation, which comprises a base disc 10, a sleeve hole 11 coaxially opened in the middle of the base disc 10, the sleeve hole 11 penetrating through the base disc 10 along the thickness direction of the base disc 10, and the diameter of the sleeve hole 11 is greater than the outer diameter of the pipe sleeve to be installed; a second lifting mechanism, which is arranged on the base disc 10 and is used for detachable connection with a lifting rope; a third clamping mechanism, which comprises a plurality of clamping arms 20, the clamping arms 20 are slidably connected with the base disc 10 along the radial direction, the inner end of the clamping arm 20 is provided with a pawl 21, and the pawl 21 is used for abutting against the outer wall of the pipe sleeve to be installed; and a fourth power mechanism, which is arranged on the base disc 10 and can make all the clamping arms 20 slide inward or outward synchronously and by the same amount.

[0028] The fixing device for transformer bushing installation disclosed by the embodiment is characterized in that: a base disc 10 is arranged, a sleeve hole 11 is formed in the middle of the base disc 10, the diameter of the sleeve hole 11 is larger than the outer diameter of the pipe sleeve to be installed, so that the base disc 10 can be sleeved on the pipe sleeve to be installed; a clamping mechanism is arranged, which includes a plurality of clamping arms 20, the clamping arms 20 are slidably connected with the base disc 10 along the radial direction, and a clamping jaw 21 is arranged at the inner end of the clamping arm 20, so that the clamping jaw 21 can abut against the outer sidewall of the pipe sleeve to be installed by sliding the clamping arm 20 inward; a power mechanism is arranged to provide power for the clamping arms 20 and enable all the clamping arms 20 to slide in the same direction and synchronously, so that all the clamping jaws 21 can simultaneously and synchronously press the sidewall of the pipe sleeve to be installed along the radial direction, thereby fixing the base disc 10 and the pipe sleeve to be installed; a hoisting mechanism is arranged on the base disc 10, so that the base disc 10 can be connected with a hoisting machine through a hoisting rope, thereby realizing the vertical hoisting of the pipe sleeve to be installed by hoisting the base disc 10; through the cooperation of the above-mentioned features, the fixing device for transformer bushing installation can effectively solve the problems of low efficiency, weak safety, excessive dependence on manual intervention and low stability in the vertical hoisting process of the transformer bushing.

[0029] In order to further explain the specific structure of the power mechanism, the power mechanism comprises a synchronous ring 30, a plurality of racks 31 and a rotating assembly; the synchronous ring 30 is coaxially and rotationally connected with the base disc 10, one side of the synchronous ring 30 is provided with a helical thread 301; the rack 31 is engaged with the helical thread 301, and the rack 31 is slidably connected with the base disc 10 along the radial direction of the base disc 10; the rotating assembly is drivingly connected with the synchronous ring 30, and the rotating assembly can rotate the synchronous ring 30; the clamping arm 20 corresponds to the rack 31 one by one, and the clamping arm 20 is fixedly connected with the corresponding rack 31 to be slidably connected with the base disc 10.

[0030] Through the above arrangement, the rotating assembly drives the synchronous ring 30 to rotate, thereby driving the rack 31 engaged with the helical thread 301 to move along the radial direction, and thereby driving the clamping arm 20 corresponding to the rack 31 to slide along the radial direction.

[0031] It should be noted that the helical thread 301 is an Archimedes helix.

[0032] For further explanation of the rotating connection structure of the synchronous ring 30 and the base disc 10, the inner side wall of the base disc 10 is inwardly excavated to form a circular rotating cavity, the cavity thickness of the rotating cavity is slightly larger than the thickness of the synchronous ring 30; the synchronous ring 30 is rotationally arranged in the rotating cavity; one side of the base disc 10 is provided with a sliding groove 12 along the thickness direction, the sliding groove 12 penetrates the base disc 10 along the radial direction, the sliding groove 12 corresponds to the rack 31 one by one, the rack 31 is embedded in the corresponding sliding groove 12 and is in sliding fit with the corresponding sliding groove 12, and is engaged with the synchronous ring 30, and the side of the rack 31 away from the synchronous ring 30 is fixedly connected with the corresponding clamping arm 20.

[0033] Through the above arrangement, the synchronous ring 30 and the base disc 10 are rotationally connected without arranging a central shaft (middle hollow); by arranging the sliding groove 12, the engagement of the rack 31 and the synchronous ring 30 is realized.

[0034] In order to radially limit the synchronous ring 30 and as much as possible not to cause structural obstruction, the inner side wall of the base disc 10 is provided with a plurality of limiting stop pieces 13, the limiting stop pieces 13 correspond to the clamping arms 20 one by one and are arranged in overlap; the limiting stop pieces 13 can partially close the cavity opening of the rotating cavity.

[0035] For further explanation of the specific structure of the rotating assembly, the rotating assembly includes a rotating handle 40, a rotating shaft 41 and an engagement mechanism; the rotating shaft 41 is rotationally connected with the base disc 10, and the rotating shaft is engaged with the synchronous ring 30 through the engagement mechanism; the outer end of the rotating shaft 41 is connected with the rotating handle 40.

[0036] Optionally, the engagement mechanism is a worm gear mechanism; or, the engagement mechanism is a gear mechanism.

[0037] Preferably, in the embodiment, the outer wall of the synchronous ring 30 is sleeved with a tooth ring, the engagement mechanism includes an input gear and an output gear, the input gear is fixedly sleeved with the rotating shaft 41, the output gear is engaged with the input gear and the tooth ring.

[0038] In order to improve the smoothness of the sliding fit between the limiting stop piece 13 and the synchronous ring 30, the inner wall of the limiting stop piece 13 is provided with a bearing, and the inner wall of the limiting stop piece 13 is in contact with the inner side wall of the synchronous ring 30 through the bearing.

[0039] For further explanation of the specific structure of the hoisting mechanism, the hoisting mechanism includes a plurality of lifting lugs or a plurality of lifting rings 50, the lifting lugs or the lifting rings 50 are fixedly connected to the outer side wall of the base disc 10; the lifting lugs or the lifting rings 50 are arranged in pairs, and each pair of the lifting lugs or the lifting rings 50 is located at the two ends of the same diameter.

[0040] By setting the pair of lifting lugs or lifting rings 50 at the two ends of the diameter, the base plate 10 can be kept horizontal by using two lifting ropes, so that the pipe sleeve being hoisted is in a vertical state.

[0041] In order to improve the matching degree and friction force of the claw 21 and the pipe sleeve, the inner wall of the claw 21 is arc-shaped, and the inner wall of the claw 21 is paved with an elastic friction layer.

[0042] The above description is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. A fixture for transformer bushing installation, characterized by, The utility model provides a kind of pipe sleeve installation device, including: Base disc (10), the sleeve hole (11) is coaxially opened in the middle of base disc (10), the sleeve hole (11) is through base disc (10) along the thickness direction of base disc (10), the diameter of sleeve hole (11) is greater than the outer diameter of pipe sleeve to be installed; Hoisting mechanism, the hoisting mechanism is provided in base disc (10), and the hoisting mechanism is used for being detachably connected with lifting rope; Clamping mechanism, the clamping mechanism includes multiple clamping arms (20), the clamping arm (20) is slidably connected with base disc (10) along radial direction, the inner end of clamping arm (20) is provided with pawl (21), and the pawl (21) is used for abutting with the outer wall of pipe sleeve to be installed; Power mechanism, the power mechanism is provided in base disc (10), and the power mechanism can make all clamping arms (20) synchronous, same amount and slide inwards or synchronous, same amount and slide outwards.

2. The fixture for transformer bushing installation of claim 1, wherein, The power mechanism includes synchronous ring (30), multiple racks (31) and rotating assembly; The synchronous ring (30) is coaxially rotatably connected with the base disc (10), and one side of the synchronous ring (30) is provided with helical thread (301); The rack (31) is engaged with the helical thread (301), and the rack (31) is slidably connected with the base disc (10) along the radial direction of the base disc (10); The rotating assembly is drivingly connected with the synchronous ring (30), and the rotating assembly can rotate the synchronous ring (30); The clamping arm (20) corresponds to the rack (31), and the clamping arm (20) is fixedly connected with the corresponding rack (31) to be slidably connected with the base disc (10).

3. The fixture for transformer bushing installation of claim 2, wherein, The inner side wall of the base disc (10) is inwardly excavated to form a circular annular rotating cavity, and the cavity thickness of the rotating cavity is slightly greater than the thickness of the synchronous ring (30); The synchronous ring (30) is rotatably arranged in the rotating cavity; One side of the base disc (10) is provided with a sliding groove (12) penetrating through along the thickness direction, and the sliding groove (12) penetrates through the base disc (10) along the radial direction; the sliding groove (12) corresponds to the rack (31), the rack (31) is embedded in the corresponding sliding groove (12) and slidably connected with the corresponding sliding groove (12), and engaged with the synchronous ring (30); the side of the rack (31) away from the synchronous ring (30) is fixedly connected with the corresponding clamping arm (20).

4. The fixture for transformer bushing installation of claim 3, wherein, The inner side wall of the base disc (10) is provided with multiple limiting stop pieces (13), and the limiting stop pieces (13) correspond to the clamping arms (20) and are arranged in overlap. The limiting stop piece (13) can partially close the cavity opening of the rotating cavity.

5. The fixture for transformer bushing installation of claim 4, wherein, The rotating assembly includes a handle (40), a rotating shaft (41) and an engagement mechanism; The rotating shaft (41) is rotatably connected with the base disc (10), and the rotating shaft is engaged with the synchronous ring (30) through the engagement mechanism; The outer end of the rotating shaft (41) is connected with the handle (40).

6. The fixture for transformer bushing installation of claim 5, wherein, The engagement mechanism is a turbine worm mechanism. Alternatively, the engagement mechanism is a gear mechanism.

7. The fixture for transformer bushing installation of claim 6, wherein, The outer wall of the synchronous ring (30) is sleeved with a gear ring, the engagement mechanism comprises an input gear and an output gear, the input gear is fixedly sleeved with the rotating shaft (41), the output gear is engaged with the input gear and engaged with the gear ring.

8. The fixture for transformer bushing installation of claim 7, wherein, The inner wall of the limiting stopper (13) is provided with a bearing, and the limiting stopper (13) is in contact and fit with the inner side wall of the synchronous ring (30) through the bearing.

9. The fixture for transformer bushing installation of claim 1, wherein, The hoisting mechanism comprises a plurality of lifting lugs or a plurality of lifting rings (50), and the lifting lugs or the lifting rings (50) are fixedly connected to the outer side wall of the base disc (10). The lifting lugs or the lifting rings (50) are arranged in pairs, and each pair of the lifting lugs or the lifting rings (50) is located at two ends of the same diameter.

10. The fixture for transformer bushing installation of claim 1, wherein, The inner wall of the claw (21) is arc-shaped, and the inner wall of the claw (21) is paved with an elastic friction layer.

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