Detachable grading ring, grading system and disassembly and assembly method

Abstract

The invention discloses a detachable grading ring, a grading system and a dismounting and mounting method, the detachable grading ring comprises a plurality of arc-shaped sub-rings, two ends of each sub-ring are respectively constructed as a plugging end and a sleeving end, in two adjacent sub-rings, the plugging end of one sub-ring can be plugged into the sleeving end of the other sub-ring, and correspondingly, the plugging end of the other sub-ring can be plugged into the sleeving end of the other sub-ring. And the plurality of sub-rings are sequentially connected to form the annular grading ring in a splicing manner. The voltage equalizing system comprises at least one detachable voltage equalizing ring. The disassembling and assembling method comprises assembling and disassembling. The whole large-size grading ring is split into a plurality of small-size sub-rings through the modularized design, and therefore the problem of transportation difficulty is solved. The two lifting belts are arranged to be connected with the pressure equalizing system and the lifting equipment correspondingly, so that the problem that disassembly and assembly are difficult is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure equalizing rings, and in particular to a detachable pressure equalizing ring, a pressure equalizing system and a disassembly and assembly method. Background Art

[0002] In high voltage tests, in order to reduce the level of partial discharge in the test circuit and improve the test quality factor, grading rings are often used to improve the electric field distribution. In order to control the surface field strength within a reasonable range, the size of the grading ring increases with the increase of the test voltage. In order to take into account the grading effect, the weight of the grading ring, the convenience of on-site operations, etc., the grading rings used in on-site high voltage level tests mostly adopt large-diameter hollow ring structures, including single rings or multiple rings. According to relevant industry standards, the recommended diameter of the 1000kV double-ring structure grading ring for on-site partial discharge tests of ultra-high voltage AC transformers is more than 2600mm, the height is 2600mm, and the ring diameter is more than 800mm. Since the surface field strength of the equipment is also affected by many factors such as altitude, atmospheric environment, and grading ring manufacturing process, in order to ensure sufficient margin and reduce test uncertainty, the external dimensions of the grading rings used in on-site high voltage tests are often larger than the recommended parameters.

[0003] For large-sized pressure equalizing rings, especially the pressure equalizing system composed of multiple pressure equalizing rings, there are many difficulties in actual use. Specifically:

[0004] The first is the difficulty in transportation. According to the current "Regulations on the Management of Overloaded Vehicles on Highways", when the "total height of the vehicle and cargo exceeds 4 meters from the ground" and "the total width of the vehicle and cargo exceeds 2.55 meters", the cargo transport vehicle is an overloaded vehicle and must go through the relevant licensing procedures in accordance with the law and, after taking effective measures, travel on the highway at the designated time, route and speed; it is not allowed to travel on the highway without permission.

[0005] The second is that it is difficult to disassemble and assemble. The distance between the large-sized grading ring and the ground is large. For example, the grading ring used in a 1000kV ultra-high voltage AC transformer is about 15m away from the ground. The disassembly and assembly of the grading ring is a high-altitude operation with high safety risks. At the same time, during disassembly and assembly, since the size of the grading ring is too large and the lifting point of the grading ring is located on the inside of the grading ring, it is difficult for workers outside the grading ring to operate. Therefore, in the prior art, workers are often required to enter the unfixed grading ring from a high-altitude work platform and manually perform the hook disassembly and assembly. This operation method has great safety risks. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the existing large-sized pressure equalizing rings are difficult to transport and disassemble. The purpose is to provide a detachable pressure equalizing ring, a pressure equalizing system and a disassembly method to solve the above problems.

[0007] The present invention is achieved through the following technical solutions:

[0008] In the first aspect, the present invention provides a detachable pressure-equalizing ring, comprising a plurality of arc-shaped sub-rings, wherein the two ends of the sub-rings are respectively constructed as a plug-in end and a sleeve end, and among two adjacent sub-rings, the plug-in end of one can be plugged into the sleeve end of the other, and accordingly, a plurality of sub-rings are connected in sequence to form an annular pressure-equalizing ring.

[0009] In a possible design, a concealer is further included, and the concealer is arranged to cover the connection between two adjacent sub-rings.

[0010] In a possible design, the concealer is made of a flexible conductive or semi-conductive material, and is constructed as a flat pad-shaped structure.

[0011] In one possible design, support rods are connected to the inner circumference of the sub-rings, and the support rods extend toward the center of the pressure equalizing ring; accordingly, an intermediate connecting piece is provided at the center of the pressure equalizing ring, and the sub-rings constituting the pressure equalizing ring are connected to the intermediate connecting piece through support rods, and the pressure equalizing ring has a height, and the intermediate connecting piece and the support rods are both located within the height range of the pressure equalizing ring.

[0012] In a possible design, the intermediate connecting member is constructed as a barrel-shaped structure, the outer periphery of the barrel-shaped structure is connected to the support rod, and the inner periphery of the barrel-shaped structure is provided with a sleeve hole.

[0013] In a possible design, an equipotential structure is provided on the voltage-equalizing ring, and the equipotential structure includes an equipotential spring or an equipotential ring. The equipotential spring is located in the socket hole, and the equipotential ring is connected to an equipotential conductor for electrical connection and an elastic rope for achieving tightness.

[0014] In a second aspect, the present invention provides a pressure equalizing system, comprising at least one detachable pressure equalizing ring as described above.

[0015] In a possible design, when a plurality of the detachable pressure-equalizing rings are provided, the plurality of detachable pressure-equalizing rings are coaxially and spaced apart from top to bottom, and each detachable pressure-equalizing ring is connected to the intermediate connecting piece via a support rod.

[0016] In one possible design, there is at least one intermediate connecting member. When multiple intermediate connecting members are provided, the intermediate connecting members are arranged one-to-one correspondingly to the detachable pressure equalizing rings, and adjacent intermediate connecting members are connected in sequence from top to bottom; and the pressure equalizing system has a height, and the intermediate connecting member is located within the height range of the pressure equalizing system.

[0017] In a third aspect, the present invention provides a method for disassembling and assembling a pressure equalizing ring, including assembly and disassembly;

[0018] Assembly consists of the following steps:

[0019] S100 installation: one end of a single lifting belt is connected to the lifting ring of a multi-leg lifting belt, the other end of the single lifting belt is connected to the lifting equipment, and the hooks of the multi-leg lifting belt are respectively connected to the lifting points of the pressure equalizing system; a wire is laid on the inner side of the uppermost pressure equalizing ring, and the wire is used to connect the hook and the lifting ring located on the inner side of the pressure equalizing ring;

[0020] S200 hoisting: hoist the pressure equalizing system by hoisting equipment; place the pressure equalizing system on the top of the casing; the lifting hook of the hoisting equipment falls to the plane area inside the uppermost pressure equalizing ring near the hoisting point;

[0021] S300 separation: The staff takes the aerial work platform to the vicinity of the pressure equalizing system; pulls the lifting ring of the multi-leg lifting belt to the outer edge of the pressure equalizing ring, and separates the two lifting belts; resets the lifting equipment;

[0022] S400 equipotential: Check whether the hook and wire of the multi-leg lifting belt are outside the voltage-equalizing ring. If yes, pull them into the voltage-equalizing ring; if there is an equipotential ring, pull the equipotential ring until it is connected to the terminal of the bushing; connect other equipotential wiring;

[0023] The wire has a certain length so that the wire is not subjected to hoisting tension; in steps S300 and S400, the staff member chooses whether to use the operating lever;

[0024] Removal includes the following steps:

[0025] S100 installation: The lifting hook of the lifting equipment is connected to a single lifting belt; the lifting hook moves to the inner side of the top pressure equalizing ring near the plane area of ​​the lifting point;

[0026] S200 dismantling: Workers take the aerial work platform to the vicinity of the pressure equalization system; dismantle the equipotential ring and other equipotential wiring;

[0027] S300 connection: pulling one of the single-leg lifting belt and the multi-leg lifting belt close to and connect with the other;

[0028] S400 lifting: adjust the hook to the vertical line of the center of gravity of the pressure equalizing system; slowly tighten the lifting belt; lift to separate the pressure equalizing system and the casing;

[0029] Among them, in steps S200 and S300, the staff can choose whether to use the operating lever.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] 1. A large-sized pressure equalizing ring is split into several small-sized sub-rings by modular design. The sub-rings are split during transportation, so that the existing common transportation tools can be used for transportation, which is convenient and reduces transportation costs. After being transported to the destination, they can be assembled into a ring-shaped pressure equalizing ring.

[0032] 2. There are two lifting belts connected to the pressure equalizing system and the lifting equipment respectively. When the staff performs separation, the aerial work platform moves to the pressure equalizing ring and then separates the two lifting belts. There is no need to directly touch the lifting point from the side of the pressure equalizing ring and operate. There is only one connection point for the two lifting belts, and the number of separation operations is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0034] Figure 1 It is a structural schematic diagram of a single ring structure.

[0035] Figure 2 It is a structural schematic diagram of a single ring structure when no intermediate connecting piece is provided.

[0036] Figure 3 It is a schematic diagram of the structure of a multi-ring structure.

[0037] Figure 4 Schematic diagram of the assembly of the equipotential ring.

[0038] Marks and corresponding parts names in the attached drawings:

[0039] 1. Sub-ring; 2. Support rod; 3. Intermediate connecting piece; 4. Equipotential ring; 5. Equipotential conductor; 6. Elastic rope. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0041] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, materials, or methods are not specifically described.

[0042] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They 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 should not be understood as limiting the scope of protection of the present invention.

[0044] Embodiment 1:

[0045] For large-sized pressure equalizing rings, in addition to the road approval issues mentioned in the background technology, the short-distance transportation and disassembly of the pressure equalizing ring during boarding and disembarking are also difficult and pose certain safety risks; in addition, the requirements for transportation tools are also high, further increasing the difficulty and cost of transportation. Therefore, the present invention provides a detachable pressure equalizing ring, specifically:

[0046] like Figure 1 and Figure 2 As shown, a detachable pressure-equalizing ring comprises a plurality of arc-shaped sub-rings 1, the two ends of the sub-rings 1 being respectively constructed as a plug-in end and a sleeve end. In two adjacent sub-rings 1, the plug-in end of one can be plugged into the sleeve end of the other. Accordingly, a plurality of sub-rings 1 are connected in sequence to form an annular pressure-equalizing ring.

[0047] That is, a modular design is used to split an entire large-sized pressure-equalizing ring into several small-sized sub-rings 1, and the sub-rings 1 are split during transportation, so that the existing common transportation tools can be used for transportation, which is convenient and reduces transportation costs; after transportation to the destination, it can be assembled into a ring-shaped pressure-equalizing ring.

[0048] Based on this, the detachable pressure equalizing ring effectively solves the problem of difficult transportation of large-sized pressure equalizing rings through a detachable design, effectively reduces the difficulty of transportation, ensures transportation safety, and saves transportation costs.

[0049] In addition, during the use of the detachable pressure equalizing ring, if it is damaged, the corresponding sub-ring 1 can be replaced without replacing the entire ring, which helps to reduce the subsequent maintenance costs.

[0050] Before work, design or select sub-rings 1 of corresponding size according to the size of the required pressure equalizing ring, select an appropriate number of sub-rings 1 and transport them to the construction site. Assemble the sub-rings 1 on site and obtain the required pressure equalizing ring. Finally, hoist the pressure equalizing ring.

[0051] In a possible implementation, (the detachable voltage-equalizing ring) also includes a concealing piece, which is arranged to cover the connection between two adjacent sub-rings 1. Based on the above design scheme, for the voltage-equalizing ring, its function is to make the distributed voltage of the suspended vertical insulator string tend to be uniform, eliminate the potential difference between various parts, and achieve the effect of equal potential. Since the detachable voltage-equalizing ring adopts a split design, there are errors in the processing of the sub-rings 1, wear of the sub-rings 1, defects in the splicing, and other factors. For the spliced ​​voltage-equalizing ring, there may be defects such as burrs and notches at the connection between the two sub-rings 1, thereby forming a potential difference and discharging outward, which not only fails to achieve the effect of using the voltage-equalizing ring, but also creates a new safety hazard. Therefore, the defective position is covered by a concealing piece.

[0052] Specifically, after the pressure equalizing ring is assembled, the staff needs to check each connection to confirm whether there are defects and the degree of defects, and then choose whether to cover them with concealing parts. The concealing parts are fixed on the outer periphery of the pressure equalizing ring and cover the defects, making the outer periphery of the pressure equalizing ring smoother and more docile, eliminating the defects on the outer periphery of the pressure equalizing ring and the potential difference caused by the defects.

[0053] It is easy to understand that the concealer can be fixed on the pressure equalizing ring by any suitable fixing method.

[0054] Optionally, the concealer is made of a flexible conductive or semi-conductive material, and is constructed as a flat pad-like structure. Based on this, the concealer has conductivity to ensure that the potential difference can be eliminated. At the same time, the shape of the concealer should also be flat to avoid the formation of a potential difference at the concealer.

[0055] In one possible implementation, a support rod 2 is connected to the inner circumference of the sub-ring 1, and the support rod 2 extends toward the center of the pressure equalizing ring; accordingly, an intermediate connecting piece 3 is provided at the center of the pressure equalizing ring, and the sub-rings 1 constituting the pressure equalizing ring are all connected to the intermediate connecting piece 3 through the support rod 2, and the pressure equalizing ring has a height, and the intermediate connecting piece 3 and the support rod 2 are both located within the height range of the pressure equalizing ring.

[0056] Based on the above design scheme, in the pressure equalizing ring, the intermediate connecting piece 3 is connected by the support rod 2. On the one hand, each sub-ring 1 is connected as a whole, which also helps to improve the structural strength of the pressure equalizing ring. On the other hand, the pressure equalizing ring is connected to related equipment through the intermediate connecting piece 3, thereby realizing the installation of the pressure equalizing ring.

[0057] It is easy to understand that at least one support rod 2 is provided on each sub-ring 1, and the number of support rods 2 is appropriately increased according to the size of the sub-ring 1. For the support rod 2, any suitable existing rod can be selected. For the connection of the support rod 2, it is connected by any suitable existing detachable connection method such as bolts, buckles, and snaps, and the connection is achieved while ensuring detachability, so that each part of the pressure equalizing ring is easy to disassemble and assemble.

[0058] In addition, in order to avoid the potential difference caused by the support rod 2 and / or the intermediate connection member 3, it is required that the intermediate connection member 3 and the support rod 2 are both located within the height range of the voltage equalizing ring to ensure that the voltage equalizing ring can be used normally.

[0059] Optionally, the intermediate connector 3 is constructed as a barrel-shaped structure, the outer periphery of the barrel-shaped structure is connected to the support rod 2, and the inner periphery of the barrel-shaped structure is provided with a socket hole. Based on the above design scheme, considering the formation of the voltage-equalizing ring, the intermediate connector 3 is preferably constructed as a barrel-shaped structure to reduce the influence of the edges on the potential and effectively reduce the edges and corners. The intermediate connector 3 is also provided with a socket hole, so that the relevant equipment is connected through the socket hole to achieve the installation of the voltage-equalizing ring.

[0060] Further, if necessary, if the detachable pressure equalizing ring can be directly placed on the test equipment, such as Figure 2 As shown, there is no need to set the intermediate connecting member 3 to simplify the structure and reduce the number of devices.

[0061] In a possible implementation, an equipotential structure is provided on the voltage-equalizing ring, and the equipotential structure includes an equipotential spring or an equipotential ring 4. The equipotential spring is located in the socket hole, and the equipotential ring 4 is connected to an equipotential conductor 5 for electrical connection and an elastic rope 6 for achieving tightness.

[0062] Based on the above design, when the voltage-grading ring is connected to the relevant equipment, the voltage-grading ring and the relevant equipment are electrically connected through the equipotential structure, thereby forming a conductive loop and achieving the equipotential effect. Specifically:

[0063] The equipotential spring is a conductive metal spring. During the installation of the equalizing ring, the equipotential spring is compressed, which not only realizes the electrical connection but also does not hinder the connection between the intermediate connector 3 and related equipment. At this time, the equipotential spring, the intermediate connector 3, the support rod 2 and the sub-ring 1 are all conductive to form a conductive circuit.

[0064] like Figure 4As shown, after the voltage-equalizing ring is installed, the equipotential ring 4 is sleeved on the relevant equipment by the staff, and the equipotential ring 4 cooperates with the equipotential conductor 5 to form a conductive loop, thereby achieving electrical connection. At the same time, an elastic rope 6 is used to ensure that the equipotential ring 4 is always pressed against the relevant equipment through the elastic force of the elastic rope 6, ensuring that the loop is always conductive.

[0065] It is easy to understand that the equipotential conductor 5 and the elastic rope 6 can be any suitable existing equipment respectively.

[0066] Based on the detachable pressure equalizing ring, a pressure equalizing system is introduced, such as Figure 1-Figure 3 As shown, the pressure equalizing system includes at least one detachable pressure equalizing ring.

[0067] In actual use, there are situations where multiple pressure equalizing rings are used at the same time. According to the number of pressure equalizing rings required, the pressure equalizing system can be divided into a single-ring structure with only one pressure equalizing ring and a multi-ring structure with multiple pressure equalizing rings. The detachable pressure equalizing rings form the uniform system, which improves the convenience and practicality of using large-sized pressure equalizing rings and ensures the normal implementation of related high-voltage tests.

[0068] In a possible implementation, when a plurality of the detachable pressure-equalizing rings are provided, the plurality of detachable pressure-equalizing rings are coaxially and spaced apart from top to bottom, and each detachable pressure-equalizing ring is connected to the intermediate connecting member 3 via a support rod 2 .

[0069] Based on the above design scheme, according to specific use requirements, technicians in this field select the size, number and layout of the pressure equalizing ring, and the pressure equalizing system is flexible and diverse in use. At the same time, for a multi-ring structure, it is connected through an intermediate connector 3. If there is only one intermediate connector 3, the support rod 2 needs to be tilted and connected. If multiple intermediate connectors 3 are provided, it helps to reduce the inclination of the support rod 2, and the layout space is larger, which helps to increase the number of support rods 2 to improve the structural strength of the pressure equalizing system.

[0070] In one possible implementation, at least one intermediate connector 3 is provided. When a plurality of intermediate connectors 3 are provided, the intermediate connectors 3 are arranged one-to-one in correspondence with the detachable pressure equalizing rings, and adjacent intermediate connectors 3 are connected in sequence from top to bottom; and the pressure equalizing system has a height, and the intermediate connectors 3 are located within the height range of the pressure equalizing system.

[0071] Based on the above design, after multiple intermediate connectors 3 are provided, the total height of the intermediate connectors 3 is relatively large. In order to avoid the formation of potential difference, the intermediate connectors 3 are required to be located within the height range of the pressure equalization system to ensure that the pressure equalization system can work normally.

[0072] In addition, for multiple intermediate connectors 3, on the basis of realizing the connection between the pressure equalizing ring and related equipment, multiple intermediate connectors 3 can be connected in sequence in the forward direction, or some of the intermediate connectors 3 can be connected in reverse direction. The connection form is flexible and diverse, and the staff can choose according to actual conditions.

[0073] Embodiment 2:

[0074] For large-sized pressure equalizing rings, it is difficult to disassemble and assemble them. Specifically, since the pressure equalizing ring is a large-diameter hollow ring structure, when the size of the pressure equalizing ring is too large, its diameter is also relatively large, and the lifting point of the pressure equalizing ring is located at the lower inner part. During the assembly process, when the pressure equalizing system is on the ground, the workers can move flexibly, conveniently and safely, and can also perform related operations; but when the pressure equalizing system is hoisted, the workers use the climbing work platform to move to the vicinity of the pressure equalizing system. At this time, the workers are limited by the working environment and the length of their arms, and it is difficult for them to directly touch the lifting point from the side of the pressure equalizing ring and operate.

[0075] Therefore, this embodiment introduces a method for disassembling and assembling a pressure equalizing ring based on the embodiment 1, and the method for disassembling and assembling a pressure equalizing ring includes assembly and disassembly;

[0076] Assembly consists of the following steps:

[0077] S100 installation: one end of a single lifting belt is connected to the lifting ring of a multi-leg lifting belt, the other end of the single lifting belt is connected to the lifting equipment, and the hooks of the multi-leg lifting belt are respectively connected to the lifting points of the pressure equalizing system; a wire is laid on the inner side of the uppermost pressure equalizing ring, and the wire is used to connect the hook and the lifting ring located on the inner side of the pressure equalizing ring;

[0078] S200 hoisting: hoist the pressure equalizing system by hoisting equipment; place the pressure equalizing system on the top of the casing; the lifting hook of the hoisting equipment falls to the plane area inside the uppermost pressure equalizing ring near the hoisting point;

[0079] S300 separation: The staff takes the aerial work platform to the vicinity of the pressure equalizing system; pulls the lifting ring of the multi-leg lifting belt to the outer edge of the pressure equalizing ring, and separates the two lifting belts; resets the lifting equipment;

[0080] S400 equipotential: Check whether the hook and wire of the multi-leg lifting belt are outside the voltage-equalizing ring. If yes, pull them into the voltage-equalizing ring; if there is an equipotential ring 4, pull the equipotential ring 4 until it is connected to the terminal of the bushing; connect other equipotential wiring;

[0081] The conductor has a certain length so that the conductor is not subjected to lifting tension.

[0082] For assembly, two lifting belts are provided to connect the pressure equalizing system and the lifting equipment respectively. When the staff disassembles, the aerial work platform moves to the pressure equalizing ring and then separates the two lifting belts. There is no need to directly touch the lifting point from the side of the pressure equalizing ring and operate. There is only one connection point for the two lifting belts, and the number of disassembly operations is also reduced.

[0083] After the two lifting belts are separated, the number of lifting points of the multi-leg lifting belts remaining on the pressure-equalizing system is increased, the force is shared, and the pressure-equalizing system can be more stable. After the separation, the hooks of the multi-leg lifting belts will fall naturally. In order to avoid the potential difference, the staff should check and pull the hooks outside the pressure-equalizing ring into the pressure-equalizing ring in time. At the same time, other equipotential wirings are further installed, which are specifically set by those skilled in the art as needed, and the present invention does not impose any restrictions on this.

[0084] At the same time, in step S100, the position of the multi-leg lifting belt is restricted by the wire, which not only improves the equipotential performance, but also limits the movement range of equipment such as the hook after removal, thereby minimizing the workload of the equipotential operation.

[0085] For the equipotential structure on the pressure equalizing ring, that is, the equipotential spring or the equipotential ring 4, the pressure equalizing system can choose one to use. Among them, for the equipotential spring, since it is located in the socket hole of the intermediate connector 3, it is connected to the casing during the installation of the pressure equalizing system, and no additional operation is required. If the equipotential ring 4 is selected, it is necessary to install it after the pressure equalizing system is installed. Among them, the specific working principles of the two have been described in Example 1, and will not be repeated here.

[0086] Optionally, in steps S300 and S400, the worker chooses whether to use the operating lever. Based on this, the operating range of the worker is expanded by the operating lever, ensuring that the worker is always located in the aerial work platform, thereby improving the safety of the operation. It is easy to understand that the operating lever can be constructed in any suitable shape, or any suitable existing equipment can be selected.

[0087] Removal includes the following steps:

[0088] S100 installation: The lifting hook of the lifting equipment is connected to a single lifting belt; the lifting hook moves to the inner side of the top pressure equalizing ring near the plane area of ​​the lifting point;

[0089] S200 dismantling: The staff takes the climbing work platform to the vicinity of the pressure equalization system; dismantles the equipotential ring 4 and other equipotential wiring;

[0090] S300 connection: pulling one of the single-leg lifting belt and the multi-leg lifting belt close to and connect with the other;

[0091] S400 lifting: adjust the hook to the vertical line of the center of gravity of the pressure equalizing system; slowly tighten the lifting belt; lift to separate the pressure equalizing system and casing.

[0092] For removal, after removing the equipotential ring 4, equipotential wiring and other equipment, the single lifting belt and the multi-leg lifting belt can be connected, which is simple, convenient and easy to operate. Similarly, in steps S200 and S300, the staff can choose whether to use the operating lever.

[0093] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A detachable pressure equalizing ring, characterized in that: It comprises a plurality of arc-shaped sub-rings (1), wherein the two ends of the sub-rings (1) are respectively constructed as a plug-in end and a sleeve end, and in two adjacent sub-rings (1), the plug-in end of one can be plugged into the sleeve end of the other, and accordingly, a plurality of sub-rings (1) are sequentially connected to form an annular pressure-equalizing ring.

2. The detachable pressure equalizing ring according to claim 1, characterized in that: It also comprises a concealing piece, which is arranged to cover the connection between two adjacent sub-rings (1).

3. The detachable pressure equalizing ring according to claim 2, characterized in that: The concealer is made of a flexible conductive or semi-conductive material and is constructed as a flat cushion-shaped structure.

4. The detachable pressure equalizing ring according to any one of claims 1 to 3, characterized in that: A support rod (2) is connected to the inner circumference of the sub-ring (1), and the support rod (2) extends toward the center of the pressure equalizing ring; accordingly, an intermediate connecting piece (3) is provided at the center of the pressure equalizing ring, and the sub-rings (1) constituting the pressure equalizing ring are connected to the intermediate connecting piece (3) via the support rod (2), and the pressure equalizing ring has a height, and the intermediate connecting piece (3) and the support rod (2) are both located within the height range of the pressure equalizing ring.

5. The detachable pressure equalizing ring according to claim 4, characterized in that: The intermediate connecting piece (3) is constructed as a barrel-shaped structure, the outer periphery of the barrel-shaped structure is connected to the support rod (2), and the inner periphery of the barrel-shaped structure is provided with a sleeve hole.

6. The detachable pressure equalizing ring according to claim 5, characterized in that: The voltage-equalizing ring is provided with an equipotential structure, which comprises an equipotential spring or an equipotential ring (4). The equipotential spring is located in the socket hole, and the equipotential ring (4) is connected with an equipotential conductor (5) for electrical connection and an elastic rope (6) for achieving tight contact.

7. A pressure equalization system, characterized in that: The invention comprises at least one detachable pressure equalizing ring according to any one of claims 1 to 6.

8. The pressure equalization system according to claim 7, characterized in that: When a plurality of the detachable pressure-equalizing rings are provided, the plurality of detachable pressure-equalizing rings are coaxially arranged from top to bottom and spaced apart, and each detachable pressure-equalizing ring is connected to the intermediate connecting member (3) via a support rod (2).

9. The pressure equalization system according to claim 8, characterized in that: At least one intermediate connecting member (3) is provided. When a plurality of intermediate connecting members (3) are provided, the intermediate connecting members (3) and the detachable pressure equalizing rings are arranged one-to-one, and adjacent intermediate connecting members (3) are connected in sequence from top to bottom; and the pressure equalizing system has a height, and the intermediate connecting member (3) is located within the height range of the pressure equalizing system.

10. A method for disassembling and assembling a pressure equalizing ring, characterized in that: Includes assembly and disassembly; Assembly consists of the following steps: S100 installation: one end of a single lifting belt is connected to the lifting ring of a multi-leg lifting belt, the other end of the single lifting belt is connected to the lifting equipment, and the hooks of the multi-leg lifting belt are respectively connected to the lifting points of the pressure equalizing system described in any one of claims 7 to 9; a wire is arranged on the inner side of the uppermost pressure equalizing ring, and the wire is used to connect the hook and the lifting ring located on the inner side of the pressure equalizing ring; S200 hoisting: hoist the pressure equalizing system by hoisting equipment; place the pressure equalizing system on the top of the casing; the lifting hook of the hoisting equipment falls to the plane area inside the uppermost pressure equalizing ring near the hoisting point; S300 separation: The staff takes the aerial work platform to the vicinity of the pressure equalizing system; pulls the lifting ring of the multi-leg lifting belt to the outer edge of the pressure equalizing ring, and separates the two lifting belts; resets the lifting equipment; S400 equipotential connection: Check whether the hook and wire of the multi-leg lifting belt are outside the voltage-equalizing ring. If yes, pull them into the voltage-equalizing ring. If there is an equipotential ring (4), pull the equipotential ring (4) until it is connected to the terminal of the bushing. Connect other equipotential connections. The wire has a certain length so that the wire is not subjected to hoisting tension; in steps S300 and S400, the staff member chooses whether to use the operating lever; Removal includes the following steps: S100 installation: The lifting hook of the lifting equipment is connected to a single lifting belt; the lifting hook moves to the inner side of the top pressure equalizing ring near the plane area of ​​the lifting point; S200 Dismantling: The staff takes the aerial work platform to the vicinity of the pressure equalization system; removes the equipotential ring (4) and other equipotential wiring; S300 connection: pulling one of the single-leg lifting belt and the multi-leg lifting belt close to and connect with the other; S400 lifting: adjust the hook to the vertical line of the center of gravity of the pressure equalizing system; slowly tighten the lifting belt; lift to separate the pressure equalizing system and the casing; Among them, in steps S200 and S300, the staff can choose whether to use the operating lever.

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