Current transformer for GIS

Abstract

The invention relates to the technical field of high-voltage electrical appliances, and particularly discloses a current transformer for a GIS, which comprises a mounting shell, a shielding sleeve, a winding and a conducting rod, the shielding sleeve is horizontally arranged in the mounting shell, the winding is sleeved on the shielding sleeve, the conducting rod penetrates through the shielding sleeve, a second detection mechanism is arranged on the wall part of the mounting shell, a first detection mechanism is arranged on the shielding sleeve, and a second detection mechanism is arranged on the conducting rod. The first detection mechanisms and the second detection mechanisms are in transmission fit, the first detection mechanisms are close to the winding, the multiple first detection mechanisms are evenly arranged at intervals in the length direction of the shielding sleeve, and each first detection mechanism comprises a first supporting plate, a guide column, a shifting ring and a detection assembly; the distance sensor on the pressing block at the bottom end of the first connecting column can detect the distance between the conducting rod and the pressing block so as to detect whether the conducting rod is installed in the middle or not, if the distances monitored by the distance sensor at the bottom end of the first connecting column are the same, the conducting rod is in the middle, and if the distances monitored by the distance sensor at the bottom end of the first connecting column are different, the conducting rod is not installed in the middle.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage electrical appliances, and in particular to a current transformer for GIS. Background Art

[0002] GIS (Gas Insulated Switchgear) is a gas insulated switchgear that uses SF6 (sulfur hexafluoride) gas as an insulating medium. Current transformers are important components in GIS and are used to measure and protect current in circuits. Current transformers are designed with long-term stable operation of GIS equipment in mind, including safety features such as explosion-proof, insulation, and gas monitoring. Current transformers are used to accurately measure electric energy. When using GIS current transformers, it is necessary to ensure that they are correctly installed and regularly test and calibrate the current transformers to ensure their accuracy and reliability. If the transformer is deformed by external forces or its own factors during use, causing the distance between the winding and the conductive rod to change, good insulation performance cannot be guaranteed, and leakage is prone to occur. At the same time, the measurement accuracy of the transformer cannot be guaranteed. For this reason, a current transformer for GIS is needed. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, an object of the present invention is to provide a current transformer for GIS.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0005] A current transformer for GIS, comprising: An installation shell, a shielding sleeve, a winding, and a conductive rod. The shielding sleeve is horizontally arranged in the installation shell, the winding sleeve is arranged on the shielding sleeve, and the conductive rod passes through the shielding sleeve. A detection mechanism 2 is arranged on the wall of the installation shell, and a detection mechanism 1 is arranged on the shielding sleeve. The detection mechanism 1 and the detection mechanism 2 are in transmission cooperation. The detection mechanism 1 is close to the winding. There are multiple detection mechanisms 1 and they are evenly spaced along the length direction of the shielding sleeve. The detection mechanism 1 includes a support plate 1, a guide column, a shift ring, and a detection assembly. The support plate 1 is fixed to the wall of the shielding sleeve, the support plate 1 is perpendicular to the shielding sleeve, the shift ring sleeve is arranged on the shielding sleeve and is on one side of the support plate 1, one end of the guide column is fixedly connected to the wall of the shift ring, the other end of the guide column passes through the plate surface of the support plate 1 and is provided with a baffle, two guide columns are provided and are arranged in parallel, the guide column is parallel to the shielding sleeve, a spring 1 is sleeved on the guide column, one end of the spring 1 contacts the plate surface of the support plate 1, and the other end of the spring 1 contacts the baffle at the end of the guide column, and the detection assembly is arranged on the shielding sleeve and close to the shift ring.

[0006] As a further improvement of the present technical solution, multiple groups of detection components are arranged evenly around the circumference of the shielding sleeve, and the detection component includes a connecting column 1 and a top head. The connecting column 1 is inserted into the tube wall of the shielding sleeve, the top head is fixed to one end of the connecting column 1, the other end of the connecting column 1 extends into the shielding sleeve and is fixed with a pressure block, the connecting column 1 is close to the shift ring, and a spring 2 is sleeved on the connecting column 1, one end of the spring 2 contacts the bottom of the top head, and the other end of the spring 2 contacts the wall of the shielding sleeve.

[0007] As a further improvement of the present technical solution, the side of the shift ring close to the connecting column one is arranged at an incline, and the top of the pin is an arc-shaped convex surface. The second detection mechanism includes a accommodating cylinder, a piston, a shift plate, a second support plate, and a cylinder. The accommodating cylinder is arranged on the wall of the mounting shell, and the piston matching sleeve is arranged in the accommodating cylinder. Hydraulic oil is stored in the accommodating cylinder, and the cylinder is arranged on the wall of the accommodating cylinder. The shift plate is arranged above the piston, and the second support plate is horizontally fixed to one side of the shift plate. The top of the cylinder is connected to the bottom of the second support plate, and the bottom of the accommodating cylinder is connected to a drain pipe. A push rod is provided in the matching sleeve in the drain pipe. The push rod is arranged horizontally and is parallel to the shielding sleeve. The push rod is close to the shift ring and is fixedly connected to the wall of the shift ring.

[0008] As a further improvement of the present technical solution, a connecting column 2 is vertically arranged on the top of the piston, and two connecting columns 2 are arranged in parallel. A connecting sleeve is vertically arranged on the bottom of the shift plate, and the connecting sleeve is arranged on the connecting column 2. A spring 3 is arranged on the connecting column 2 and the connecting sleeve, and one end of the spring 3 contacts the bottom of the shift plate, and the other end of the spring 3 contacts the top of the piston.

[0009] As a further improvement of the technical solution, the wall of the piston is provided with scale lines, and the top of the accommodating cylinder is provided with a marking needle, and the marking needle is close to the scale lines.

[0010] As a further improvement of the technical solution, the side wall slope of the shift ring is at an angle of 45°.

[0011] As a further improvement of the technical solution, a distance sensor is provided at the bottom of the pressing block.

[0012] As a further improvement of the technical solution, an observation window is provided on the wall of the mounting shell.

[0013] Compared with the prior art, the present invention has the following progress and advantages: during the use of the present invention, when the conductive rod passes through the shielding sleeve for installation, the distance sensor on the pressing block at the bottom end of the connecting column can detect the distance between the conductive rod and the pressing block, thereby detecting whether the conductive rod is installed in the center; if the distances monitored by the distance sensor at the bottom end of the connecting column are the same, it indicates that the conductive rod is in the center; if they are different, it indicates that the conductive rod is not installed in the center; If the conductive rod of the transformer is deformed due to external force or its own factors during use, the distance sensor at the bottom end of the connecting column can detect the deformation of the conductive rod. The detection principle is the same as above. After detecting the deformation of the conductive rod, the deformed part of the conductive rod is squeezed and centered, so that a certain safety distance is maintained between the winding and the conductive rod, which not only ensures good insulation performance and prevents leakage, but also ensures the measurement accuracy of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a second schematic diagram of the detection mechanism of the present invention.

[0017] Figure 3 It is a schematic diagram of the installation of the detection mechanism of the present invention.

[0018] Figure 4 It is a schematic diagram of the cooperation between the detection mechanism 2 and the detection mechanism 1 of the present invention.

[0019] Figure 5 It is a schematic diagram of the piston installation of the present invention.

[0020] Figure 6 It is a schematic diagram of the installation of the shift ring of the present invention.

[0021] Figure 7 It is a schematic diagram of the cooperation between the shift ring and the connecting column of the present invention.

[0022] The figure shows: 10. Installation housing; 110. Observation window; 120. Shielding sleeve; 130. Winding; 140. Detection mechanism 1; 141. Support plate 1; 142. Guide column; 143. Shift ring; 144. Connecting column 1; 145. Head; 20. Detection mechanism 2; 210. Accommodating cylinder; 211. Marking needle; 220. Piston; 221. Scale line; 230. Shift plate; 231. Connecting column 2; 232. Connecting sleeve; 240. Support plate 2; 250. Cylinder; 260. Discharge pipe; 270. Push rod. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-Figure 7 As shown, a current transformer for GIS, comprising: The installation shell 10, the shielding sleeve 120, the winding 130, and the conductive rod are installed. The shielding sleeve 120 is horizontally arranged in the installation shell 10, the winding 130 is sleeved on the shielding sleeve 120, and the conductive rod passes through the shielding sleeve 120. The wall of the installation shell 10 is provided with a detection mechanism 20, and the shielding sleeve 120 is provided with a detection mechanism 140. The detection mechanism 140 and the detection mechanism 20 are matched with each other in transmission. The detection mechanism 140 is close to the winding 130. The detection mechanism 140 is provided with multiple detection mechanisms and is evenly spaced along the length direction of the shielding sleeve 120. The detection mechanism 140 includes a support plate 141, a guide column 142, a shift ring 143, and a detection component. The support plate A 141 is fixed to the wall of the shielding sleeve 120, the support plate 141 is perpendicular to the shielding sleeve 120, the shift ring 143 is sleeved on the shielding sleeve 120 and is located on one side of the support plate 141, one end of the guide column 142 is fixedly connected to the wall of the shift ring 143, the other end of the guide column 142 passes through the plate surface of the support plate 141 and is provided with a baffle, two guide columns 142 are provided and are arranged in parallel, the guide columns 142 are parallel to the shielding sleeve 120, a spring 1 is sleeved on the guide column 142, one end of the spring 1 is in contact with the plate surface of the support plate 141, and the other end of the spring 1 is in contact with the baffle at the end of the guide column 142, and the detection component is arranged on the shielding sleeve 120 and close to the shift ring 143.

[0028] More specifically, the detection components are provided with multiple groups and are evenly arranged around the circumference of the shielding sleeve 120. The detection components include a connecting column 144 and a top head 145. The connecting column 144 is inserted into the tube wall of the shielding sleeve 120, the top head 145 is fixed to one end of the connecting column 144, the other end of the connecting column 144 extends into the shielding sleeve 120 and is fixed with a pressure block, the connecting column 144 is close to the shift ring 143, and a spring 2 is sleeved on the connecting column 144, one end of the spring 2 contacts the bottom of the top head 145, and the other end of the spring 2 contacts the wall of the shielding sleeve 120.

[0029] More specifically, the side of the shift ring 143 close to the connecting column 144 is arranged obliquely, the top of the head 145 is an arc-shaped convex surface, the detection mechanism 20 includes a accommodating cylinder 210, a piston 220, a shift plate 230, a support plate 240, and a cylinder 250. The accommodating cylinder 210 is arranged on the wall of the mounting housing 10, the piston 220 is matched and sleeved in the accommodating cylinder 210, the accommodating cylinder 210 stores hydraulic oil, and the cylinder 250 is arranged on the wall of the accommodating cylinder 210. The shift plate 230 is arranged above the piston 220, the support plate 240 is horizontally fixed on one side of the shift plate 230, the top of the cylinder 250 is connected to the bottom of the support plate 240, the bottom of the accommodating tube 210 is connected to a drain pipe 260, and a push rod 270 is provided in a matching sleeve inside the drain pipe 260. The push rod 270 is horizontally arranged and parallel to the shielding sleeve 120. The push rod 270 is close to the shift ring 143 and fixedly connected to the wall of the shift ring 143.

[0030] like Figure 5-Figure 7 As shown, a connecting column 231 is vertically provided on the top of the piston 220, and two connecting columns 231 are provided and arranged in parallel. A connecting sleeve 232 is vertically provided on the bottom of the shift plate 230, and the connecting sleeve 232 is sleeved on the connecting column 231. A spring 3 is sleeved on the connecting column 231 and the connecting sleeve 232, and one end of the spring 3 contacts the bottom of the shift plate 230, and the other end of the spring 3 contacts the top of the piston 220.

[0031] More specifically, a scale line 221 is provided on the wall of the piston 220 , and a marking needle 211 is provided on the top of the accommodating cylinder 210 , and the marking needle 211 is close to the scale line 221 .

[0032] More specifically, the side wall slope of the shift ring 143 is at an angle of 45°, thereby ensuring that the moving distance of the shift ring 143 is the same as the moving distance of the connecting column 144.

[0033] More specifically, a distance sensor is disposed at the bottom of the pressing block.

[0034] More specifically, an observation window 110 is provided on the wall of the mounting housing 10 to facilitate observation of the movement of the shift ring 143 .

[0035] Working principle: During the use of the present invention, when the conductive rod passes through the shielding sleeve 120 for installation, the distance sensor on the pressure block at the bottom of the connecting column 144 can detect the distance between the conductive rod and the pressure block, thereby detecting whether the conductive rod is installed in the center. If the distances monitored by the distance sensor at the bottom of the connecting column 144 are the same, it indicates that the conductive rod is in the center. If they are different, it indicates that the conductive rod is not installed in the center. If the mutual inductor is deformed by external force or its own factors during use, the distance sensor at the bottom of the connecting column 144 can detect the deformation of the conductive rod. The detection principle is the same as above. After detecting the deformation of the conductive rod, the cylinder 250 is opened, and the cylinder 250 drives the shift plate 2 30 moves downward, thereby driving the piston 220 to move downward, and then the piston 220 squeezes the hydraulic oil in the accommodating cylinder 210, so that the hydraulic oil flows through the discharge pipe 260, thereby driving the push rod 270 to move, and then driving the shift ring 143 to move along the length direction of the shielding sleeve 120, and then the inclined surface of the shift ring 143 abuts against the top head 145, thereby driving the connecting column 144 to move downward, so that the bottom pressure block of the connecting column 144 abuts against the conductive rod, thereby squeezing the deformed part of the conductive rod to the center, so as to maintain a certain safety distance between the winding and the conductive rod, which not only ensures good insulation performance and prevents leakage, but also ensures the measurement accuracy of the transformer.

[0036] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A current transformer for GIS, characterized in that: It includes: An installation shell, a shielding sleeve, a winding, and a conductive rod. The shielding sleeve is horizontally arranged in the installation shell, the winding sleeve is arranged on the shielding sleeve, and the conductive rod passes through the shielding sleeve. A detection mechanism 2 is arranged on the wall of the installation shell, and a detection mechanism 1 is arranged on the shielding sleeve. The detection mechanism 1 and the detection mechanism 2 are in transmission cooperation. The detection mechanism 1 is close to the winding. There are multiple detection mechanisms 1 and they are evenly spaced along the length direction of the shielding sleeve. The detection mechanism 1 includes a support plate 1, a guide column, a shift ring, and a detection assembly. The support plate 1 is fixed to the wall of the shielding sleeve, the support plate 1 is perpendicular to the shielding sleeve, the shift ring sleeve is arranged on the shielding sleeve and is on one side of the support plate 1, one end of the guide column is fixedly connected to the wall of the shift ring, the other end of the guide column passes through the plate surface of the support plate 1 and is provided with a baffle, two guide columns are provided and are arranged in parallel, the guide column is parallel to the shielding sleeve, a spring 1 is sleeved on the guide column, one end of the spring 1 contacts the plate surface of the support plate 1, and the other end of the spring 1 contacts the baffle at the end of the guide column, and the detection assembly is arranged on the shielding sleeve and close to the shift ring.

2. A current transformer for GIS according to claim 1, characterized in that: The detection components are provided with multiple groups and are evenly arranged around the circumference of the shielding sleeve. The detection components include a connecting column and a top head. The connecting column is inserted into the tube wall of the shielding sleeve, the top head is fixed to one end of the connecting column, the other end of the connecting column extends into the shielding sleeve and is fixed with a pressure block, the connecting column is close to the shift ring, and a spring is provided on the connecting column, one end of the spring is in contact with the bottom of the top head, and the other end of the spring is in contact with the wall of the shielding sleeve.

3. A current transformer for GIS according to claim 2, characterized in that: The side of the shift ring close to the connecting column one is arranged inclined, and the top of the pin is an arc-shaped convex surface. The detection mechanism two includes a accommodating cylinder, a piston, a shift plate, a second support plate, and a cylinder. The accommodating cylinder is arranged on the wall of the mounting shell, and the piston matching sleeve is arranged in the accommodating cylinder. Hydraulic oil is stored in the accommodating cylinder, and the cylinder is arranged on the wall of the accommodating cylinder. The shift plate is arranged above the piston, and the second support plate is horizontally fixed to one side of the shift plate. The top of the cylinder is connected to the bottom of the second support plate, and the bottom of the accommodating cylinder is connected to a drain pipe. A push rod is provided in the matching sleeve in the drain pipe. The push rod is horizontally arranged and parallel to the shielding sleeve. The push rod is close to the shift ring and fixedly connected to the wall of the shift ring.

4. A current transformer for GIS according to claim 3, characterized in that: A connecting column 2 is vertically arranged on the top of the piston, and two connecting columns 2 are arranged in parallel. A connecting sleeve is vertically arranged on the bottom of the shift plate, and the connecting sleeve is arranged on the connecting column 2. A spring 3 is arranged on the connecting column 2 and the connecting sleeve, and one end of the spring 3 contacts the bottom of the shift plate, and the other end of the spring 3 contacts the top of the piston.

5. A current transformer for GIS according to claim 4, characterized in that: The wall of the piston is provided with scale lines, and the top of the accommodating cylinder is provided with a marking needle, which is close to the scale lines.

6. A current transformer for GIS according to claim 5, characterized in that: The side wall slope of the shift ring is at an angle of 45°.

7. A current transformer for GIS according to claim 6, characterized in that: A distance sensor is arranged at the bottom of the pressing block.

8. A current transformer for GIS according to claim 7, characterized in that: The wall portion of the mounting housing is provided with an observation window.

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