Connecting device of transformer and transformer assembly

Abstract

The utility model discloses a connecting device of a transformer and a transformer assembly. The connecting device comprises a first connecting piece, a second connecting piece, a clamping piece and a pre-tightening piece. The first connecting piece is fixedly connected with the mounting foundation, and the second connecting piece is fixedly connected with the transformer; the clamping piece clamps the first connecting piece and the second connecting piece in the first direction. The pre-tightening piece presses the clamping piece in the first direction, and the first connecting piece and the second connecting piece can move relative to the clamping piece in the second direction. The clamping piece and the pre-tightening piece limit the first connecting piece and the second connecting piece in the first direction, and connection of the transformer and the installation foundation is achieved. The first connecting piece and the second connecting piece can move in the second direction, the transformer and the installation foundation can move in the second direction so as to adapt to relative movement of the transformer and the installation foundation in the earthquake process, and earthquake energy is weakened through friction force generated in the movement process of the first connecting piece and the second connecting piece. And the anti-seismic performance of the connecting device is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of transformers, and in particular to a transformer connection device and a transformer assembly. Background Technology

[0002] The core functions of a transformer are to achieve voltage transformation (step-up or step-down), current transformation, impedance matching, and electrical isolation. It is widely used in power transmission, industrial equipment power supply, and medical fields to ensure that electrical energy is efficiently and safely adapted to different needs.

[0003] Currently, transformers are usually fixed in place. If an earthquake occurs in the application environment of the transformer, the rigid connection of the transformer may break, which may lead to the transformer shifting or tilting. This could result in secondary disasters such as fire, power outage, and water outage caused by transformer damage.

[0004] Therefore, how to improve the seismic resistance of transformers is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a connection device for a transformer to improve the transformer's seismic resistance. Furthermore, the present invention also provides a transformer assembly having the aforementioned connection device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A transformer connection device includes: a first connector configured to be fixedly connected to a mounting base; a second connector configured to be fixedly connected to a transformer; a clamping member configured to clamp the first connector and the second connector along a first direction; and a pre-tightening member configured to press the clamping member along the first direction, the clamping member clamping the first connector and the second connector, the first connector and the second connector being movable relative to the clamping member along a second direction; the first direction being the arrangement direction of the mounting base and the transformer, and the second direction intersecting the first direction.

[0008] Preferably, in the above-described transformer connection device, the first connector and the second connector are arranged along the second direction; the clamping member includes an upper pressure plate and a lower pressure plate; the upper pressure plate and the lower pressure plate are arranged along the first direction, and the upper pressure plate is located on the upper surface of the first connector and the second connector along the first direction; the lower pressure plate is located on the lower surface of the first connector and the second connector along the first direction.

[0009] Preferably, in the above-described transformer connection device, at least one of the upper pressure plate and the upper surface of the first connecting member and the upper surface of the upper pressure plate and the second connecting member is provided with a friction plate.

[0010] Preferably, in the above-described transformer connection device, at least one of the lower pressure plate and the lower surface of the first connecting member and the lower surface of the lower pressure plate and the second connecting member is provided with a friction plate.

[0011] Preferably, in the above-described transformer connection device, the first connector has a first through hole, at least a portion of the pre-tightening member passes through the first through hole, and the dimension of the first through hole along the second direction is greater than the dimension of the pre-tightening member along the second direction; and / or, the second connector has a second through hole, at least a portion of the pre-tightening member passes through the second through hole, and the dimension of the second through hole along the second direction is greater than the dimension of the pre-tightening member along the second direction.

[0012] Preferably, in the above-mentioned transformer connection device, both the first through hole and the second through hole are round holes, the pre-tightening member is a threaded connector, and the pre-tightening member is threadedly connected to the clamping member; the diameters of both the first through hole and the second through hole are larger than the diameter of the pre-tightening member.

[0013] Preferably, in the above-mentioned transformer connection device, both the first connector and the second connector are L-shaped plates; and the pre-tightening member clamps one section of the L-shaped plate, the other section of the first connector is configured to be fixedly connected to the transformer mounting base; and the other section of the second connector is configured to be fixedly connected to the transformer.

[0014] A transformer assembly includes a transformer, a mounting base, and a connection device, wherein the connection device is any of the connection devices described above.

[0015] Preferably, in the above-mentioned transformer assembly, a connecting plate is pre-embedded in the mounting foundation, the connecting device is installed on the connecting plate, and the first connecting member of the connecting device is welded to the connecting plate.

[0016] Preferably, in the above-mentioned transformer assembly, the bottom surface of the transformer is in contact with the mounting base, and the position where the bottom surface of the transformer is in contact with the mounting base is sandblasted.

[0017] The connecting device disclosed in this embodiment of the utility model uses clamping members and pre-tightening members to limit the first connecting member and the second connecting member along the first direction, thereby realizing the connection between the first connecting member and the second connecting member, that is, realizing the connection between the transformer and the installation foundation; while the first connecting member and the second connecting member can move along the second direction, thereby realizing the movement of the transformer and the installation foundation in the second direction, so as to adapt to the relative movement of the transformer and the installation foundation during the earthquake, and to weaken the earthquake energy by using the friction force of the first connecting member and the second connecting member during movement, thereby improving the seismic performance of the connecting device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a top view of the transformer assembly disclosed in an embodiment of the present utility model;

[0020] Figure 2 This is a partial sectional view of the transformer assembly disclosed in an embodiment of the present utility model;

[0021] Figure 3 This is a front view of the connecting device disclosed in an embodiment of the present utility model;

[0022] Figure 4 This is a top view of the first connecting member of the connecting device disclosed in an embodiment of the present utility model;

[0023] Figure 5 This is a top view of the second connector of the connecting device disclosed in an embodiment of the present utility model;

[0024] Figure 6 This is a top view of the upper pressure plate of the connecting device disclosed in an embodiment of the present utility model;

[0025] Figure 7 This is a top view of the lower pressure plate of the connecting device disclosed in an embodiment of the present utility model;

[0026] Figure 8 This is a top view of the friction plate of the connecting device disclosed in an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the bottom surface of the transformer disclosed in an embodiment of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] The core functions of a transformer are to achieve voltage transformation (step-up or step-down), current transformation, impedance matching, and electrical isolation. It is widely used in power transmission, industrial equipment power supply, and medical fields to ensure that electrical energy is efficiently and safely adapted to different needs.

[0031] Currently, transformers are usually fixed in place. If an earthquake occurs in the application environment of the transformer, the rigid connection of the transformer may break, which may lead to the transformer shifting or tilting. This could result in secondary disasters such as fire, power outage, and water outage caused by transformer damage.

[0032] Based on the above problems, this application discloses a transformer connection device. This connection device can be used to connect the transformer and the mounting foundation, and can enable the transformer to move relative to the mounting foundation to adapt to the situation where there is relative displacement between the transformer and the mounting foundation in an earthquake scenario.

[0033] like Figure 1 As shown in the figure, this application discloses a transformer assembly, including a transformer 100, a mounting base 200, and a connecting device 300.

[0034] The connecting device 300 is used to connect the transformer 100 and the mounting base 200. The number of connecting devices 300 can be set according to different needs. Optionally, the connecting devices 300 may include, but are not limited to, four, arranged in a rectangular shape. In some embodiments, the connecting devices 300 may be arranged at or near the four apex corners of the transformer 100.

[0035] Optionally, the transformer 100 is placed above the mounting base 200. In this document, the arrangement direction of the transformer 100 and the mounting base 200 is defined as follows: the vertical direction is the first direction; the second direction is the direction that intersects with the first direction. Optionally, the second direction is perpendicular to the first direction. When the first direction is vertical, the second direction is horizontal.

[0036] like Figure 2 and Figure 3 As shown, the connecting device 300 disclosed in this application embodiment includes: an elastic member 301, a first connecting member 302, a second connecting member 303, a pre-tightening member 304, an upper pressure plate 305, a lower pressure plate 306, and a friction plate 307.

[0037] The first connector 302 is fixedly connected to the mounting base 200, and the second connector 303 is fixedly connected to the transformer 100. Optionally, the first connector 302 and the second connector 303 are arranged along a second direction.

[0038] The upper pressure plate 305 is located on the upper surface of the first connector 302 and the second connector 303 along the first direction, and the lower pressure plate 306 is located on the lower surface of the first connector 302 and the second connector 303 along the first direction. The upper pressure plate 305 and the lower pressure plate 306 clamp the first connector 302 and the second connector 303 between the upper pressure plate 305 and the lower pressure plate 306, thereby limiting the first connector 302 and the second connector 303 along the first direction.

[0039] In this embodiment of the application, the upper pressure plate 305 and the lower pressure plate 306 clamp the first connector 302 and the second connector 303 between the upper pressure plate 305 and the lower pressure plate 306, thereby achieving the clamping of the first connector 302 and the second connector 303 along the first direction by the upper pressure plate 305 and the lower pressure plate 306, so that the first connector 302 and the second connector 303 are connected.

[0040] Those skilled in the art will understand that the clamping components include, but are not limited to, the combination of the upper pressure plate 305 and the lower pressure plate 306 described above, and may also be other structures that can clamp the first connecting member 302 and the second connecting member 303, all of which are within the scope of protection.

[0041] In some embodiments, the first connector 302 and the second connector 303 may also be fixed along the first direction by clamping members of other structures. For example, the clamping members may also include mechanical claws.

[0042] The preload 304 is configured to press the clamping member along a first direction to clamp the first connector 302 and the second connector 303, thereby limiting the first connector 302 and the second connector 303 along the first direction. Optionally, the preload 304 passes through the upper pressure plate 305 and the lower pressure plate 306, and connects the upper pressure plate 305 and the lower pressure plate 306, thereby limiting and fixing the first connector 302 and the second connector 303 along the first direction by the upper pressure plate 305 and the lower pressure plate 306.

[0043] In optional embodiments, the preload 304 includes, but is not limited to, a bolt. Optionally, the upper pressure plate 305 and the lower pressure plate 306 have threaded holes for connection with the bolt. When the preload 304 is a bolt, an elastic element 301 is provided between the bolt head and the upper pressure plate 305. The elastic element 301 can compensate for the manufacturing tolerances of the threaded pair during bolt processing to ensure the preload force of the preload 304.

[0044] It should be noted that in this embodiment, the pretensioner 304 and the upper pressure plate 305, as well as the pretensioner 304 and the lower pressure plate 306, are all connected by threads. This allows for a fixed connection between the pretensioner 304, the upper pressure plate 305, and the lower pressure plate 306 using the threaded connection. The threaded connection method is simple in structure and provides a stable connection after connection.

[0045] In this embodiment, the upper pressure plate 305, the lower pressure plate 306, and the pre-tightening member 304 are used to limit the first connecting member 302 and the second connecting member 303 along the first direction, thereby realizing the connection between the first connecting member 302 and the second connecting member 303. This can be understood as: the transformer 100 and the mounting base 200 can be relatively fixed in the first direction, thereby realizing the installation of the transformer 100 and the mounting base 200.

[0046] The first connector 302 and the second connector 303 can move relative to the clamping member in the second direction, that is, the upper pressure plate 305 and the lower pressure plate 306 do not limit the first connector 302 and the second connector 303 in the second direction, so that the first connector 302 and the second connector 303 can move in the second direction.

[0047] It should be noted that: the clamping member and the pre-tightening member 304 limit the first connecting member 302 and the second connecting member 303 along the first direction to realize the connection of the first connecting member 302 and the second connecting member 303; while the first connecting member 302 and the second connecting member 303 can move along the second direction respectively, so as to realize the movement of the transformer 100 and the mounting foundation 200 in the second direction, so as to adapt to the relative movement of the transformer 100 and the mounting foundation 200 during the earthquake and improve the seismic performance of the connection device.

[0048] Furthermore, at least one of the upper pressure plate 305 and the upper surface of the first connecting member 302 and the upper surface of the upper pressure plate 305 and the second connecting member 303 is provided with a friction plate 307. For example, friction plates 307 are provided between the upper pressure plate 305 and the upper surface of the first connecting member 302 and between the upper pressure plate 305 and the upper surface of the second connecting member 303.

[0049] By adding friction pad 307, the friction force between the upper surface of the first connector 302 and the upper pressure plate 305 can be increased, as can the friction force between the upper surface of the second connector 303 and the upper pressure plate 305. The contact between the upper surface of the first connector 302 and the friction pad 307 allows the first connector 302 and the upper pressure plate 305 to tend to move relative to each other, or during movement. The friction force between the first connector 302 and the friction pad 307 can slow down the relative movement between the first connector 302 and the upper pressure plate 305. In other words, the friction force between the first connector 302 and the friction pad 307 can convert seismic energy into thermal and kinetic energy, thereby weakening the transformer's response during an earthquake.

[0050] Similarly, the upper surface of the second connector 303 is in contact with the friction plate 307, which allows friction to be generated between the second connector 303 and the upper pressure plate 305. During an earthquake, the friction between the second connector 303 and the upper pressure plate 305 can convert the energy of the earthquake into thermal and kinetic energy, thereby weakening the transformer's response during the earthquake.

[0051] Optionally, the friction plate 307 between the first connector 302 and the upper pressure plate 305 and the friction plate 307 between the second connector 303 and the upper pressure plate 305 are integral structures.

[0052] A friction plate 307 is provided between the lower surface of the lower pressure plate 306 and the lower surface of the first connecting member 302 and between the lower pressure plate 306 and the lower surface of the second connecting member 303.

[0053] Based on the function of the friction pad 307 between the upper surfaces of the first connector 302 and the second connector 303 and the upper pressure plate 305, it can be seen that the friction pad 307 between the lower surfaces of the first connector 302 and the second connector 303 and the lower pressure plate 306 has the same function, both of which can offset the energy of the first connector 302 and the second connector 303 moving along the second direction during the earthquake.

[0054] Optionally, the friction plate 307 between the first connector 302 and the lower pressure plate 306 and the friction plate 307 between the second connector 303 and the lower pressure plate 306 are integral structures.

[0055] The friction pad 307 disclosed in this application includes, but is not limited to, using polymer friction materials, generally phenolic resin boards. Optionally, the friction coefficient of the friction pad 307 is 0.2-1.0, and optionally, the friction coefficient of the friction pad 307 is 0.3.

[0056] Combination Figure 4 and Figure 5 As shown, the first connector 302 and the second connector 303 disclosed in the embodiments of this application have the same structure, both being L-shaped plates.

[0057] like Figure 4 As shown, the first connector 302 includes a first flat plate segment 3022 and a first vertical plate segment 3021, wherein the first flat plate segment 3022 extends along a second direction, the first vertical plate segment 3021 extends along a first direction, and the first flat plate segment 3022 and the first vertical plate segment 3021 are connected as an integral structure.

[0058] The upper pressure plate 305 and lower pressure plate 306 clamp the first flat plate segment 3022. Optionally, the upper pressure plate 305, lower pressure plate 306, and first flat plate segment 3022 are arranged in parallel and stacked. The first vertical plate segment 3021 is fixedly connected to the mounting base 200. Optionally, the first vertical plate segment 3021 and the mounting base 200 are connected by welding or other means.

[0059] like Figure 5 As shown, the second connector 303 includes a second flat plate segment 3032 and a second vertical plate segment 3031, wherein the second flat plate segment 3032 extends along a second direction, the second vertical plate segment 3031 extends along a first direction, and the second flat plate segment 3032 and the second vertical plate segment 3031 are connected as an integral structure.

[0060] The upper pressure plate 305 and lower pressure plate 306 clamp the second flat plate segment 3032. Optionally, the upper pressure plate 305, lower pressure plate 306, and second flat plate segment 3032 are arranged in parallel and stacked. The second vertical plate segment 3031 is fixedly connected to the transformer 100. Optionally, the second vertical plate segment 3031 and the transformer 100 are connected by welding, among other things.

[0061] In some embodiments, the dimensions of the first plate segment 3022 along the first direction are the same as those of the second plate segment 3032 along the first direction, that is, the thicknesses of the first plate segment 3022 and the second plate segment 3032 are the same, and they are of equal height.

[0062] With the above settings, both the upper pressure plate 305 and the lower pressure plate 306 can be flat plates. After the upper pressure plate 305 and the lower pressure plate 306 are clamped by the pre-tightening member 304, the first connecting member 302 and the second connecting member 303 can be clamped at the same time.

[0063] The first plate segment 3022 of the first connector 302 has a first through hole 3023, and the dimension of the first through hole 3023 along the second direction is greater than the dimension of the pretensioner 304 along the second direction; the second plate segment 3032 of the second connector 303 has a second through hole 3033, and the dimension of the second through hole 3033 along the second direction is greater than the dimension of the pretensioner 304 along the second direction.

[0064] During the assembly of the connecting device 300, a portion of the pre-tightening member 304 passes through the first through hole 3023. Since the dimension of the pre-tightening member 304 along the second direction is smaller than the dimensions of the first through hole 3023 and the second through hole 3033 along the second direction, both the first connecting member 302 and the second connecting member 303 can move in the second direction. This achieves the limiting of the first connecting member 302 and the second connecting member 303 in the first direction, while also enabling the first connecting member 302 and the second connecting member 303 to move in the second direction.

[0065] In some embodiments, the first through hole 3023 and the second through hole 3033 in this document are both round holes, the preload 304 is a threaded connector, and the diameters of the first through hole 2023 and the second through hole 3033 are both larger than the diameter of the preload 304.

[0066] It should be noted that the first through hole 3023 and the second through hole 3033 in this embodiment adopt a circular hole structure design, which allows the first connector 302 and the second connector 303 to slide in any direction relative to the friction plate 307 within the plane where the friction plate 307 is located. The resulting sliding energy dissipation can cope with seismic wave input in any direction, increasing the applicability of the connecting device 300. By utilizing the friction energy dissipation in all directions, seismic energy is effectively attenuated, thereby significantly reducing the overall vibration response of the transformer.

[0067] In some embodiments, the first connector 302 and the second connector 303 are, but are not limited to, formed by bending a steel plate. Optionally, the thickness of the steel plate is 32 mm. Optionally, the diameter of the first through hole 3023 of the first connector 302 and the second through hole 3033 of the second connector 303 are both three times the diameter of the preload 304. For example, if the diameter of the preload 304 is 20 mm, then the diameter of the first through hole 3023 and the second through hole 3033 is 60 mm. The first through hole 3023 and the second through hole 3033 include, but are not limited to, three, in order to increase the number of preloads 304 and improve assembly stability. This application is not limited to three.

[0068] Combination Figures 6 to 8 As shown, the upper pressure plate 305 has a first threaded hole 3051, the lower pressure plate 306 has a second threaded hole 3061, and the friction plate 307 has a third threaded hole 3071. Optionally, after the connecting device 300 is assembled, the first threaded hole 3051, the second threaded hole 3061, and the third threaded hole 3071 correspond one-to-one, and a portion of the first threaded hole 3051 is opposite to the first through hole 3023, while the remaining portion of the first threaded hole 3051 is opposite to the second through hole 3033.

[0069] In this paper, the diameter of the third threaded hole 3071 on the friction plate 307 is 1.1 times the diameter of the preload 304, the diameter of the first threaded hole 3051 on the upper pressure plate 305 is 1.1 times the diameter of the preload 304, and the diameter of the second threaded hole 3061 on the lower pressure plate 306 is the same as the diameter of the preload 304. For example, the diameter of the preload 304 is 20 mm, the diameters of the first threaded hole 3051 and the third threaded hole 3071 are 22 mm, and the diameter of the second threaded hole 3061 is 20 mm.

[0070] By reducing the diameter of the second threaded hole 3061, the second threaded hole 3061 can be used to lock the preload 304 with the thread, thereby eliminating the space occupied by the traditional bolt and nut combination and making the connecting device 300 more compact.

[0071] The first connector 302, the second connector 303, the pretensioner 304, the upper pressure plate 305, and the lower pressure plate 306 mentioned in this article are, but are not limited to, made of Q235 structural steel.

[0072] The surfaces of the first connector 302, the second connector 303, the upper pressure plate 305, and the lower pressure plate 306 are all sandblasted. Optionally, the surface roughness of the first connector 302, the second connector 303, the upper pressure plate 305, and the lower pressure plate 306 is greater than 100 μm to ensure that the surfaces of the first connector 302, the second connector 303, the upper pressure plate 305, and the lower pressure plate 306 have a large friction force when in contact. In addition, the surfaces of the first connector 302, the second connector 303, the upper pressure plate 305, the lower pressure plate 306, and the friction plate 307 are treated with anti-corrosion to prevent them from rusting.

[0073] In addition, such as Figure 2 As shown, in the embodiment of this application, a connecting plate 201 is pre-embedded in the installation base 200 of the transformer assembly, the connecting device 300 is installed on the connecting plate 201, and the first connecting member 302 of the connecting device 300 is welded to the connecting plate 201.

[0074] The shape and size of the connecting plate 201 can be set according to different needs. For example, the connecting plate 201 includes a first plate and a second plate. The first plate extends along a second direction to support the transformer 100; the second plate is inserted into the mounting base 200 along a first direction to increase the stability of the connection between the second plate and the mounting base 200.

[0075] Optionally, the mounting base 200 may be made of cement or metal, and the connecting plate 201 may be made of structural steel, among other things.

[0076] Combination Figure 2 and Figure 9As shown, the bottom surface of the transformer 100 is rectangular, and the transformer 100 is placed on the strip-shaped mounting base 200. Optionally, the position where the transformer 100 and the mounting base 200 are in contact is sandblasted to increase the roughness of the position where the transformer 100 and the mounting base 200 are in contact, thereby increasing the friction at the position where the transformer 100 and the mounting base 200 are in contact and further reducing seismic energy.

[0077] The above description illustrates the specific structure of the connecting device 300 and the transformer assembly using the connecting device 300 in this application embodiment. The following description explains the torque calculation process required for the preload member 304 involved in this application embodiment:

[0078] Using the connection device 300 disclosed in this application embodiment, when the seismic intensity exceeds a preset value, the movement of the first connector 302 and the second connector 303 absorbs seismic energy, effectively preventing the transformer 100 from experiencing stress concentration exceeding design limits. The damping generated by the first connector 302, the second connector 303, and the friction plate 307 enables the conversion of seismic energy into thermal and kinetic energy. While effectively reducing the seismic response of the transformer, the torque of the preload 304 needs to achieve dynamic balance with the sliding friction torque generated by the friction plate 307. This article uses a magnitude 7 earthquake as an example for explanation; for other earthquake levels, please refer to the calculation process below. The specific calculation steps for the torque applied by the preload bolts of the seismic-resistant device are as follows:

[0079] Step 1: According to the provisions of GB 50260-1996 Code for Seismic Design of Power Facilities, the design parameters for horizontal ground acceleration corresponding to a magnitude 7 earthquake are found to be: peak horizontal acceleration ah = 0.15 (N / kg), peak vertical acceleration ah = 0.1 (N / kg). The weight of transformer 100 is set to W = 100000 (kg), the coefficient of friction between transformer 100 and the installation foundation 200 is μ = 0.1, the number of connecting devices 300 is N = 4, and the coefficient of friction of connecting devices 300 is μ = 0.3.

[0080] Step 2: Determine the shear force V that transformer 100 will withstand:

[0081] V=μ*W*(g-av)-ah*W

[0082] = 0.1 * 100000 * (0.98 - 0.1) - 0.15 * 100000

[0083] = -6200(N)

[0084] If the connecting device 300 is not installed at the bottom of the enclosure, the transformer 100 may experience overall displacement or tilting when subjected to force.

[0085] Step 3: Determine the preload force P of the preload component 304: p = V / (μv*N)

[0086] =6200 / (0.3*4)

[0087] =5166(N)

[0088] To prevent overall displacement and tilting of transformer 100, a connecting device 300 must be configured and the preload force of the preload component 304 must be strictly controlled.

[0089] Step 4: Determine the diameter of the preload 304 of the connecting device 300 and the bolt torque.

[0090] The preload 304 uses M20 bolts, grade 8.8. According to the "VDI 2230 Calculation Standard for High Strength Bolt Connection Systems", the recommended value for the coefficient of friction K of the bolt is 0.18 under unlubricated conditions and general surface conditions.

[0091] Torque T = P * K * D

[0092] =5166*0.18*20

[0093] =18597(N*mm)

[0094] The final bolt torque for the transformer's seismic protection device was determined to be 18597 (N*mm).

[0095] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0096] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection device for a transformer, characterized in that, include: A first connector (302) is configured to be fixedly connected to the mounting base (200); A second connector (303) is configured to be fixedly connected to the transformer (100); A clamping member configured to clamp the first connector (302) and the second connector (303) along a first direction; A preload (304) is configured to press the clamping member along a first direction, the clamping member clamping the first connector (302) and the second connector (303), the first connector (302) and the second connector (303) being movable relative to the clamping member along a second direction; the first direction is the arrangement direction of the mounting base (200) and the transformer (100), and the second direction intersects the first direction.

2. The transformer connection device according to claim 1, characterized in that, The first connector (302) and the second connector (303) are arranged along the second direction; The clamping components include: an upper pressure plate (305) and a lower pressure plate (306); The upper pressure plate (305) and the lower pressure plate (306) are arranged along the first direction, and the upper pressure plate (305) is located on the upper surface of the first connector (302) and the second connector (303) along the first direction; the lower pressure plate (306) is located on the lower surface of the first connector (302) and the second connector (303) along the first direction.

3. The transformer connection device according to claim 2, characterized in that, At least one of the upper pressure plate (305) and the upper surface of the first connector (302) is provided with a friction plate (307) and the upper surface of the upper pressure plate (305) and the second connector (303).

4. The transformer connection device according to claim 2 or 3, characterized in that, At least one of the lower pressure plate (306) and the lower surface of the first connector (302) is provided with a friction plate (307) and the lower surface of the lower pressure plate (306) and the second connector (303).

5. The transformer connection device according to claim 4, characterized in that, The first connector (302) has a first through hole (3023), at least a portion of the pretensioner (304) passes through the first through hole (3023), and the dimension of the first through hole (3023) along the second direction is larger than the dimension of the pretensioner (304) along the second direction; And / or, The second connector (303) has a second through hole (3033), at least a portion of the pretensioner (304) passes through the second through hole (3033), and the dimension of the second through hole (3033) along the second direction is greater than the dimension of the pretensioner (304) along the second direction.

6. The transformer connection device according to claim 5, characterized in that, Both the first through hole (3023) and the second through hole (3033) are round holes, the pre-tightening member (304) is a threaded connector, and the pre-tightening member (304) is threadedly connected to the clamping member; The diameters of the first through hole (3023) and the second through hole (3033) are both larger than the diameter of the preload (304).

7. The transformer connection device according to any one of claims 1 to 3, characterized in that, Both the first connector (302) and the second connector (303) are L-shaped plates; The pre-tightening member (304) clamps one section of the L-shaped plate, and the other section of the first connecting member (302) is configured to be fixedly connected to the transformer mounting base (200); the other section of the second connecting member (303) is configured to be fixedly connected to the transformer (100).

8. A transformer assembly, characterized in that, It includes a transformer (100), a mounting base (200), and a connecting device (300), wherein the connecting device (300) is the connecting device as described in any one of claims 1 to 7.

9. The transformer assembly according to claim 8, characterized in that, A connecting plate (201) is pre-embedded in the installation base (200), the connecting device (300) is installed on the connecting plate (201), and the first connecting piece (302) of the connecting device (300) is welded to the connecting plate (201).

10. The transformer assembly according to claim 8, characterized in that, The bottom surface of the transformer (100) is in contact with the mounting base (200), and the position where the bottom surface of the transformer (100) is in contact with the mounting base (200) is sandblasted.

Images