Temperature sensing cable mounting bracket and main transformer

Abstract

The utility model discloses a temperature sensing cable installation support and a main transformer, and relates to the technical field related to electric power systems, the temperature sensing cable installation support comprises a support body, and the support body is arranged on the outer side of the main transformer; the first end of the support body is fixedly connected with a shell of the main transformer, the second end of the support body is provided with one or more mounting rings, and the mounting rings are used for being arranged on the outer side of a temperature sensing cable in a sleeving mode so that the temperature sensing cable can be fixedly connected with the support body. According to the technical scheme provided by the utility model, the temperature sensing cable can be safely, reliably and firmly mounted on the main transformer.

Description

Technical Field

[0001] The utility model relates to the technical field related to power systems, and in particular to a temperature-sensing cable installation bracket and a main transformer. Background Art

[0002] A main transformer, or simply a main transformer, is a step-down transformer used primarily for power transmission and transformation within a unit or substation. It is responsible for voltage and current conversion and power transmission, and its performance directly impacts the safe and stable operation of the power system. During operation, the main transformer generates a certain amount of heat, causing it to overheat and increase in temperature, which reduces its service life. Therefore, the temperature of the main transformer should be closely monitored during operation, especially in high ambient temperatures, under full load, or under overload.

[0003] Temperature-sensing cables, as cable-type, linear heat-sensing fire detectors, use the thermoelectric effect to infer the medium temperature by measuring the voltage difference between conductors, thereby enabling temperature monitoring and measurement. By wrapping the temperature-sensing cables around the transformer body and the outside of the oil conservator of the main transformer, they can effectively monitor temperature changes within the transformer and conservator, promptly identifying potential temperature anomalies and taking measures to prevent equipment damage or accidents.

[0004] In the prior art, temperature-sensing cables are typically installed on the main transformer by welding or clamping. However, during substation construction, welding or adding bolt holes to the main transformer is not permitted on site to ensure its safety. Therefore, safely and securely installing the temperature-sensing cable on the main transformer presents challenges.

[0005] It should be noted that the above content is only used to assist in understanding the technical solution of the present utility model, and does not mean that the above content is admitted to be prior art. Utility Model Content

[0006] The main purpose of the utility model is to provide a temperature-sensing cable installation bracket and a main transformer, aiming to enable the temperature-sensing cable to be safely, reliably and firmly installed on the main transformer.

[0007] To achieve the above-mentioned objectives, the present invention proposes a temperature-sensing cable mounting bracket, which is applied to a main transformer; the temperature-sensing cable mounting bracket includes a bracket body, which is arranged on the outside of the main transformer; the first end of the bracket body is fixedly connected to the shell of the main transformer, and the second end of the bracket body is provided with one or more mounting rings, which are used to be sleeved on the outside of the temperature-sensing cable to fixedly connect the temperature-sensing cable to the bracket body.

[0008] In one embodiment, the temperature sensing cable is laid on the outside of the main transformer through a plurality of the bracket bodies; and at least two temperature sensing cables are laid on the outside of each main transformer, and a preset distance is provided between two adjacent temperature sensing cables.

[0009] In one embodiment,

[0010] When the cross-sectional shape of the shell is a square structure, the bracket body is arranged on two opposite sides of each corner of the shell;

[0011] Alternatively, when the cross-sectional shape of the shell is a circular structure, the bracket body is annularly arranged at equal distances around the axis of the shell on the outer side of the shell.

[0012] In one embodiment, the bracket body includes a first connecting beam, the first connecting beam includes a first plate and a second plate connected to each other at right angles, and the mounting ring is installed on the first plate; the end of the first connecting beam is fixedly connected to a third plate, the plate plane of the third plate is in contact with the outer surface of the square structure of the shell, and the third plate is fixedly connected to the shell.

[0013] In one embodiment, the third plate is connected to the housing by welding.

[0014] In one embodiment, the bracket body includes a second connecting beam, the first end of which is fixedly connected to a connecting piece with a cylindrical structure, the arcuate surface of the connecting piece is in contact with the outer surface of the arcuate structure of the shell, and the connecting piece and the shell are connected by welding.

[0015] In one embodiment, the axial direction of the second connecting beam is perpendicular to the axial direction of the connecting member; and / or a reinforcing member with a triangular structure is provided at the connection between the second connecting beam and the connecting member.

[0016] In one embodiment, the mounting ring includes a mounting strip with a long strip structure, and the mounting strip is made of a deformable metal material; the middle area of ​​the mounting strip is used to be sleeved on the outside of the temperature sensing cable, and the end area of ​​the mounting strip is used to be fixedly connected to the bracket body.

[0017] In one embodiment, the end region of the mounting bar is provided with a plurality of locking holes; the locking holes are used for locking bolts to pass through, so that the end region of the mounting bar and the bracket body are fixed to each other.

[0018] To achieve the above objectives, the present invention proposes a main transformer, which includes a transformer body and an oil pillow. Both the transformer body and the oil pillow are provided with any of the above-mentioned temperature-sensing cable mounting brackets.

[0019] The technical solution of the present invention is to pre-install a bracket body on the outside of the main transformer before shipment. Specifically, the first end of the bracket body is fixedly connected to the housing of the main transformer, and one or more mounting rings are provided at the second end of the bracket body. The mounting rings are used to fit over the outside of the temperature-sensing cable to securely connect the temperature-sensing cable to the bracket body. Through the above technical solution, the bracket body is pre-installed on the main transformer and used as a connecting medium between the main transformer and the temperature-sensing cable. This not only meets the fixing requirements of the temperature-sensing cable, but also avoids welding the main transformer or adding bolt holes to install the temperature-sensing cable at the construction site, thereby achieving a safe, reliable and secure installation of the temperature-sensing cable on the main transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a front view of the transformer body in an embodiment of the temperature-sensing cable mounting bracket provided by the present invention;

[0022] Figure 2 A top view of a transformer body in an embodiment of a temperature-sensing cable mounting bracket provided by the present invention;

[0023] Figure 3 This is a front view of the oil conservator in one embodiment of the temperature-sensing cable mounting bracket provided by the present invention;

[0024] Figure 4 A top view of the oil pillow in one embodiment of the temperature-sensing cable mounting bracket provided by the present invention;

[0025] Figure 5 This is a structural schematic diagram of the first connecting beam in an embodiment of the temperature-sensing cable installation bracket provided by the present invention;

[0026] Figure 6 This is a second structural diagram of the first connecting beam in an embodiment of the temperature sensing cable installation bracket provided by the present invention;

[0027] Figure 7This is a structural schematic diagram of the second connecting beam in an embodiment of the temperature-sensing cable installation bracket provided by the present invention;

[0028] Figure 8 This is a second structural diagram of the second connecting beam in an embodiment of the temperature sensing cable installation bracket provided by the present invention;

[0029] Figure 9 This is a third structural diagram of the second connecting beam in an embodiment of the temperature sensing cable installation bracket provided by the present invention;

[0030] Figure 10 This is a structural schematic diagram of the mounting ring in an embodiment of the temperature sensing cable mounting bracket provided by the present invention.

[0031] Description of reference numerals:

[0032] 1. Main transformer; 101. Transformer body; 102. Oil pillow; 103. Housing; 2. Bracket body; 3. Mounting ring; 301. Mounting strip; 302. Locking hole; 4. Temperature sensing cable; 5. First connecting beam; 501. First plate; 502. Second plate; 503. First through-hole portion; 6. Third plate; 8. Second connecting beam; 801. Insertion hole; 802. Second through-hole portion; 9. Connector; 10. Reinforcement member; 11. Locking bolt; 12. Locking nut.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the description is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, it should be noted that the descriptions of "first", "second", etc. in this utility model are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0037] In the prior art, temperature-sensing cables are typically installed on the main transformer by welding or clamping. However, during substation construction, welding or adding bolt holes to the main transformer is not permitted on site to ensure its safety. Therefore, safely and reliably installing the temperature-sensing cable on the main transformer presents challenges.

[0038] In order to solve the above technical problems, the utility model provides a temperature-sensing cable installation bracket and a main transformer.

[0039] See also Figure 1-4 In one embodiment of the present invention, the temperature sensing cable mounting bracket is applied to the main transformer 1; specifically, the temperature sensing cable mounting bracket includes a bracket body 2, which is arranged on the outside of the main transformer 1; the first end of the bracket body 2 is fixedly connected to the shell 103 of the main transformer 1, and the second end of the bracket body 2 is provided with one or more mounting rings 3, which are used to be sleeved on the outside of the temperature sensing cable 4 to fixedly connect the temperature sensing cable 4 to the bracket body 2.

[0040] The technical solution of the present invention is to pre-install a bracket body on the outside of the main transformer 1 before shipment. Specifically, the first end of the bracket body is fixedly connected to the housing 103 of the main transformer 1. One or more mounting rings 3 are provided at the second end of the bracket body 2. The mounting rings 3 are used to sleeve the outside of the temperature-sensing cable 4 to securely connect the temperature-sensing cable 4 to the bracket body 2. Through the above technical solution, the bracket body 2 is pre-installed on the main transformer 1 and used as a connecting medium between the main transformer 1 and the temperature-sensing cable 4. This not only meets the fixing requirements of the temperature-sensing cable 4, but also avoids welding the main transformer 1 or adding bolt holes to install the temperature-sensing cable 4 at the construction site, thereby achieving a safe, reliable and secure installation of the temperature-sensing cable 4 on the main transformer 1.

[0041] Specifically, the temperature-sensing cable 4 is wrapped around several bracket bodies 2 and laid outside the main transformer 1. This arrangement, through the cooperation of multiple bracket bodies 2, wraps the temperature-sensing cable 4 around the outside of the main transformer 1, resulting in a simple structure and strong practicality. Furthermore, this embodiment further provides that at least two temperature-sensing cables 4 are wrapped around the outside of each main transformer 1, with a predetermined distance between adjacent temperature-sensing cables 4. The provision of multiple sections of temperature-sensing cable 4 ensures that temperature monitoring can be performed in every area of ​​the main transformer 1 as much as possible, allowing for the timely detection of potential temperature anomalies and the implementation of measures to prevent equipment damage or accidents.

[0042] Further, refer to the attached Figure 1-2 For the transformer body 101 in the main transformer 1, since the cross-sectional shape of its shell 103 is generally a square structure, the bracket body 2 is arranged on opposite sides of each corner of the shell 103; this can prevent the temperature sensing cable 4 from contacting the corners of the transformer body 101 at the bend, thereby preventing the outside of the temperature sensing cable 4 from being damaged by the sharp friction at the corners of the transformer body 101.

[0043] Further, refer to the attached Figure 3-4 For the oil pillow 102 in the main transformer 1, since the cross-sectional shape of its shell 103 is usually a circular structure, the bracket body 2 is arranged in a circular shape at equal distances around the axis of the shell 103 on the outer side of the shell 103; in this way, it can be ensured that the temperature sensing cable 4 can be surrounded by the outer periphery of the oil pillow 102 in a nearly concentric circle manner.

[0044] There are many specific structures of the bracket body 2. In one embodiment, refer to the attached Figure 5-6 When the cross-sectional shape of the transformer body 101 or its housing 103 is a square structure, the bracket body 2 is designed to include a first connecting beam 5. The first connecting beam 5 includes a first plate 501 and a second plate 502 connected at right angles to each other, that is, the first connecting beam 5 is equivalent to an angle steel structure. The mounting ring 3 is mounted on the horizontally arranged first plate 501. The end of the first connecting beam 5 is fixedly connected to the third plate 6. The flat surface of the third plate 6 is aligned with the outer surface of the square structure of the housing 103, and the third plate 6 is fixedly connected to the housing 103. In this arrangement, considering that the mounting surface of the square housing 103 is generally a flat structure, this embodiment fixes the first connecting beam 5 to the housing 103 via the third plate 6, so that the flat surface of the third plate 6 is aligned with the flat surface of the housing 103. This maximizes the connection area between the third plate 6 and the housing 103, thereby improving the mounting security between the bracket body 2 and the housing 103, and further ensuring that the temperature sensing cable 4 can be safely, reliably and securely mounted on the main transformer 1.

[0045] Furthermore, the third plate 6 is connected to the housing 103 by welding. In this way, the third plate 6 and the housing 103 are fixed to each other by welding, which has a simple structure and strong practicality.

[0046] Regarding the specific structure of the bracket body 2, in another embodiment, refer to the attached Figure 7-9 When the cross-sectional shape of the shell 103 of the oil pillow 102 is a circular structure, the bracket body 2 is designed to include a second connecting beam 8. The first end of the second connecting beam 8 is fixedly connected to a connecting member 9 of a cylindrical structure. The curved surface of the connecting member 9 contacts the outer surface of the curved structure of the shell 103. The connecting member 9 and the shell 103 are connected by welding. In this arrangement, considering that the mounting surface of the circular shell 103 is generally a curved surface structure, in order to facilitate the curved surface connection, the connecting member 9 is set to a cylindrical structure. The curved surface of the connecting member 9 contacts the curved surface of the shell 103 to improve the contact success rate between the connecting member 9 and the shell 103. Then, the connecting member 9 and the shell 103 are welded together on both sides of the contact surface, thereby ensuring the installation firmness between the bracket body 2 and the shell 103, and further ensuring that the temperature sensing cable 4 can be safely, reliably and firmly installed on the main transformer 1.

[0047] Furthermore, the axial direction of the second connecting beam 8 is perpendicular to the axial direction of the connecting member 9; and a triangular reinforcement member 10 is provided at the connection between the second connecting beam 8 and the connecting member 9. This arrangement, taking into account the cylindrical structure of the connecting column, enhances the connection strength between the second connecting beam 8 and the connecting member 9, preventing fracture at the connection between the second connecting beam 8 and the connecting member 9, which could affect the installation of the temperature-sensing cable 4.

[0048] As a preferred solution of the above embodiment, refer to the attached Figure 10The mounting ring 3 includes a mounting strip 301 with a long strip structure, and the mounting strip 301 is made of a deformable metal material; the middle area of ​​the mounting strip 301 is used to be sleeved on the outside of the temperature sensing cable 4, and the end area of ​​the mounting strip 301 is used to be fixedly connected to the bracket body 2. Such a setting is made in view of the fact that the diameter sizes of the temperature-sensing cables 4 of different manufacturers on the market vary to varying degrees, and in order to ensure that the mounting ring 3 can be firmly sleeved on the outside of the temperature-sensing cables 4 of various sizes; in this embodiment, the mounting ring 3 is set as a mounting bar 301 with a long strip structure. Since the mounting bar 301 is made of a deformable metal material, during the installation process, the middle area of ​​the mounting bar 301 is first sleeved on the outside of the temperature-sensing cable 4. At this time, the middle area of ​​the mounting bar 301 is bent into an arc-shaped structure to fit the outside of the temperature-sensing cable 4; then the end area of ​​the mounting bar 301 is fixedly connected to the bracket body 2. At this time, the temperature-sensing cable 4 is confined to the closed area surrounded by the middle area of ​​the mounting bar 301 and the bracket body 2, thereby achieving the purpose of fixing the temperature-sensing cable 4 to the bracket body 2.

[0049] There are many ways to fix the end area of ​​the mounting strip 301 to the bracket body 2. In one embodiment, the end area of ​​the mounting strip 301 is provided with a plurality of locking holes 302; the locking holes 302 are used for the locking bolts 11 to pass through, so that the end area of ​​the mounting strip 301 and the bracket body 2 are fixed to each other.

[0050] For details, please refer to the attached Figure 5-6 When the cross-section of the housing 103 of the transformer body 101 is a square structure, the mounting ring 3 is fixedly connected to the horizontally disposed first plate 501. At least two first through-holes 503 are provided on the first plate 501. After the end regions of the mounting bar 301 pass through the first through-holes 503, locking bolts 11 are passed through the locking holes 302 at the opposite ends of the mounting bar 301 and secured with locking nuts 12. The locking bolts 11 prevent the end regions of the mounting bar 301 from being withdrawn from the first through-holes 503, thereby securing the mounting ring 3 to the bracket body 2. A plurality of locking holes 302 are also provided at the end regions of the mounting bar 301. These locking holes 302 are arranged in a linear array along the length of the mounting bar 301 to accommodate temperature-sensing cables 4 of varying diameters. It is understandable that when selecting the locking hole 302 and the locking bolt 11 for installation, the operator selects the locking hole 302 as close to the first through hole portion 503 as possible, so as to ensure that there is no loose gap between the mounting bar 301 and the bracket body 2.

[0051] For details, please refer to the attached Figure 7-9, when the cross-sectional shape of the shell 103 of the oil pillow 102 is a circular structure, since the mounting ring 3 is fixedly connected to the end of the second connecting beam 8, an insertion hole 801 is provided at the second end of the second connecting beam 8, and second through-hole portions 802 are respectively provided on the opposite sides of the second connecting beam 8, wherein the second through-hole portions 802 and the insertion hole 801 are communicated with each other; after the end area of ​​the mounting strip 301 is inserted into the interior of the insertion hole 801, its locking hole 302 is aligned with the second through-hole portion 802 as much as possible; then the locking bolt 11 is used to pass through the second through-hole portion 802 and the locking hole 302 in sequence, and locked with the locking nut 12. At this time, due to the restriction of the locking bolt 11, the end area of ​​the mounting strip 301 cannot be withdrawn from the insertion hole 801, thereby achieving the purpose of fixing the mounting ring 3 to the bracket body 2. Several locking holes 302 are also provided at the end of the mounting bar 301. These locking holes 302 are arranged in a linear array along the length of the mounting bar 301 to accommodate temperature-sensing cables 4 of varying diameters. It is understood that when selecting the locking holes 302 to align with the second through-holes 802, the operator will preferably select a locking hole 302 as close to the second end of the second connecting beam 8 as possible to ensure that there is no loose gap between the mounting bar 301 and the bracket body 2.

[0052] This embodiment also discloses a main transformer, comprising a transformer body and an oil conservator. Both the transformer body and the oil conservator are equipped with the temperature-sensing cable mounting bracket described in any of the aforementioned embodiments. The specific structure of the temperature-sensing cable mounting bracket can be found in the aforementioned embodiments. Because this main transformer utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated upon here.

[0053] It should be noted that the temperature-sensing cable mounting bracket and other contents of the main transformer disclosed in the present invention are prior art and will not be described in detail here.

[0054] The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any direct / indirect application of the present invention in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A temperature sensing cable mounting bracket, used for a main transformer; characterized in that: The temperature-sensing cable mounting bracket includes a bracket body, which is arranged on the outside of the main transformer; the first end of the bracket body is fixedly connected to the shell of the main transformer, and the second end of the bracket body is provided with one or more mounting rings, which are used to be sleeved on the outside of the temperature-sensing cable to fix the temperature-sensing cable to the bracket body.

2. The temperature-sensing cable mounting bracket according to claim 1, wherein: The temperature-sensing cables are laid on the outside of the main transformer by winding through a plurality of the bracket bodies; and at least two temperature-sensing cables are laid on the outside of each main transformer, and a preset distance is provided between two adjacent temperature-sensing cables.

3. The temperature-sensing cable mounting bracket according to claim 1, wherein: When the cross-sectional shape of the shell is a square structure, the bracket body is arranged on two opposite sides of each corner of the shell; Alternatively, when the cross-sectional shape of the shell is a circular structure, the bracket body is annularly arranged at equal distances around the axis of the shell on the outer side of the shell.

4. The temperature-sensing cable mounting bracket according to claim 3, characterized in that: The bracket body includes a first connecting beam, which includes a first plate and a second plate connected to each other at right angles, and the mounting ring is installed on the first plate; the end of the first connecting beam is fixedly connected to a third plate, the plate plane of the third plate is in contact with the outer surface of the square structure of the shell, and the third plate is fixedly connected to the shell.

5. The temperature-sensing cable mounting bracket according to claim 4, characterized in that: The third plate is connected to the shell by welding.

6. The temperature-sensing cable mounting bracket according to claim 3, characterized in that: The bracket body includes a second connecting beam, a first end of which is fixedly connected to a connecting piece with a cylindrical structure, an arcuate surface of the connecting piece contacts the outer surface of the arcuate structure of the shell, and the connecting piece and the shell are connected by welding.

7. The temperature-sensing cable mounting bracket according to claim 6, characterized in that: The axial direction of the second connecting beam is perpendicular to the axial direction of the connecting member; and / or a reinforcing member with a triangular structure is provided at the connection between the second connecting beam and the connecting member.

8. The temperature-sensing cable mounting bracket according to claim 1, wherein: The mounting ring includes a mounting strip with an elongated structure, and the mounting strip is made of a deformable metal material; the middle area of ​​the mounting strip is used to be sleeved on the outside of the temperature sensing cable, and the end area of ​​the mounting strip is used to be fixedly connected to the bracket body.

9. The temperature-sensing cable mounting bracket according to claim 8, characterized in that: The end region of the mounting strip is provided with a plurality of locking holes; the locking holes are used for locking bolts to pass through, so that the end region of the mounting strip and the bracket body are fixed to each other.

10. A main transformer, comprising a transformer body and an oil conservator, characterized in that: The transformer body and the oil conservator are both provided with the temperature-sensing cable mounting bracket according to any one of claims 1 to 9.

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