Temperature monitoring device for dry-type high-voltage wall bushing

Abstract

The utility model belongs to the technical field of electric power facilities, and particularly relates to a temperature monitoring device for a dry-type high-voltage wall bushing, which comprises a wall bushing and a wall flange arranged on the wall bushing, and temperature measuring components are sleeved on two sides of the wall flange on the wall bushing; the temperature measuring assembly comprises a first inner hoop, a second inner hoop and a plurality of temperature measuring elements which are annularly arrayed along the inner wall of the first inner hoop, and the sensing ends of the temperature measuring elements are connected with element outgoing lines; the first inner hoop and the second inner hoop are connected into a whole left and right; a wire groove is formed in the inner wall of the second inner hoop and used for containing an element outgoing line, the element outgoing line extends towards the top of the second inner hoop in the grooving direction of the wire groove, and the extending position is connected with an external controller through a hole site formed in the second inner hoop. According to the utility model, the problems of high cost and high installation and maintenance complexity caused by the fact that the existing device needs to be accurately calibrated during installation and also needs to be periodically maintained and calibrated are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power facilities, and in particular relates to a temperature monitoring device for a dry-type high-voltage wall bushing. Background Art

[0002] Indoor substations provide an ideal operating environment for high-voltage power distribution equipment, and usually choose wall bushings as the insulation method for incoming and outgoing wires. When installing capacitive wall bushings, the grounding of the wall flange is very important. The end screen lead wire of the bushing close to the wall flange is used for loss measurement test terminals, but because of its concentrated field strength, the end screen lead wire needs to be well grounded, otherwise it may generate a floating potential, causing discharge to the ground or even breakdown of the capacitor screen, so it becomes a fault point. At this time, the fault point is often manifested as abnormal heating on both sides of the wall flange. In order to detect and handle faults in time, it is very important to choose an efficient temperature monitoring method.

[0003] At present, the patent with application number 202410307393.9 has announced an intelligent temperature measurement wall bushing based on a fiber Bragg grating temperature sensor. The structure is that the fiber Bragg grating temperature sensor is aimed at the common heating parts of the wall bushing, and a fiber Bragg grating sensor device is set. It is respectively attached to the metal parts of the middle wall flange and the connecting terminal of the wall bushing to carry out targeted monitoring of the wall bushing temperature.

[0004] Although this device can efficiently and accurately monitor the operating status of high-voltage DC wall bushings, it requires precise installation and calibration processes during installation, which increases the manufacturing cost and installation complexity of the equipment. In addition, due to the sensitivity of optical fiber sensors to environmental changes, they require regular maintenance and calibration, which increases the cost and complexity of maintenance. Utility Model Content

[0005] The utility model aims to provide a temperature monitoring device for a dry-type high-voltage wall bushing, which has low manufacturing cost, is easy to install, has low maintenance cost and can ensure accurate temperature monitoring.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A temperature monitoring device for a dry high-voltage wall bushing, comprising: a wall bushing and a wall flange arranged on the wall bushing, and temperature measuring components are sleeved on both sides of the wall bushing located on the wall flange;

[0008] The temperature measuring assembly comprises: a first inner hoop and a second inner hoop and a plurality of temperature measuring elements arranged in a circular array along the inner wall of the first inner hoop, wherein the sensing end of the temperature measuring element is connected to the element lead wire;

[0009] The first inner hoop and the second inner hoop are connected to form an integral whole;

[0010] A wire groove is provided on the inner wall of the second inner hoop for accommodating the lead wires of the components. The lead wires of the components extend toward the top of the second inner hoop along the groove direction of the wire groove, and the extension part is connected to the external controller through the hole provided in the second inner hoop.

[0011] Furthermore, it also includes: an outer clamp, which is composed of two semicircular rings, and the first inner clamp and the second inner clamp contained in the outer clamp are clamped on the wall sleeve through bolt holes arranged at the connection of the semicircular rings.

[0012] Furthermore, the first inner hoop and the second inner hoop are respectively composed of two semicircular rings, a magnetic isolation pad is arranged on the connecting parts of the semicircular rings, and a temperature measuring element pad is arranged on the inner wall of the first inner hoop.

[0013] Furthermore, the wall sleeve is provided with two sealing rings, which are symmetrically arranged on both sides of the outer hoop, and the outer diameter of the sealing ring is greater than the outer diameter of the first inner hoop and the second inner hoop.

[0014] Furthermore, a sealing groove is provided on the inner wall of the sealing ring, and a sealing ring is provided in the sealing groove to protect the temperature measuring element.

[0015] Furthermore, the lead wire sleeve of the component is arranged in a shielding sheath, and the shielding sheath is a braided copper mesh sheath.

[0016] Furthermore, the second inner clamp is provided with a wire outlet hole for extending the lead wire of the component to the outside.

[0017] Furthermore, the outer edges of the outer clamp and the sealing ring are rounded.

[0018] Furthermore, there are six temperature measuring elements, each of which is arranged around the center of the first inner hoop, and each of the temperature measuring elements is arranged at an interval of 60°.

[0019] Furthermore, the temperature measuring component is made of stainless steel.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] (1) The utility model monitors temperature changes by setting a device on the pipe wall of the wall bushing. Specifically, by placing a ring array of temperature measuring elements on the inner wall of the first inner hoop, the temperature measuring elements are evenly distributed on the pipe side of the wall bushing, ensuring accurate temperature monitoring. In addition, the wire groove set by the second hoop accommodates the element lead wire connected to the sensing end of the temperature measuring element. The element lead wire eventually extends to the outside through the top of the second hoop and is connected to the external controller, thus completing the temperature monitoring. The first inner hoop and the second hoop are directly set on the pipe wall as one body, eliminating the need for accurate position calibration of traditional devices, improving installation efficiency, and ensuring that they can be quickly disassembled during maintenance, effectively reducing maintenance costs.

[0022] (2) The utility model provides an outer clamp, so that the first inner clamp and the second inner clamp are sleeved inside the outer clamp, and the clamp is arranged in a semicircular manner, thereby ensuring that the device is firmly held on the wall sleeve and improving the maintenance convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded view of the utility model;

[0024] Figure 2 It is a three-dimensional diagram of the utility model;

[0025] Figure 3 It is a cross-sectional view of the utility model;

[0026] Figure 4 It is a partial left view of the utility model;

[0027] Figure 5 This is the actual working diagram of the utility model.

[0028] In the figure: 1. first inner clamp; 10. temperature measuring element; 11. wire duct; 12. element lead wire; 13. shielding sheath; 2. second inner clamp; 20. lead hole; 3. outer clamp; 30. bolt hole; 4. sealing ring; 40. sealing groove; 41. sealing ring; 5. wall flange; 6. wall sleeve. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0030] like Figure 1-Figure 5 In this embodiment, it includes: a first inner hoop 1 and a second inner hoop 2, wherein the first inner hoop 1 and the second inner hoop 2 are distributed on the left and right and are integrated;

[0031] A ring array of temperature measuring elements 10 is arranged along the inner wall of the first inner hoop 1, and the sensing end of each temperature measuring element 10 is connected to an element lead wire 12;

[0032] It should be noted that the number of the temperature measuring elements 10 is 6, and the temperature measuring elements 10 are arranged around the center of the first inner hoop, and each temperature measuring element is arranged at an interval of 60°.

[0033] A wire groove 11 is formed on the inner wall of the second inner hoop 2, and component lead wires 12 are accommodated in the wire groove 11. Each component lead wire 12 extends toward the top of the second inner hoop 2, extends to the outside of the second inner hoop 2, and is connected to an external controller.

[0034] It should be noted that the external controller is a DCS or a display terminal.

[0035] Specifically, the external controller sets an alarm value so that when the temperature is abnormal, the external controller can give an alarm in time.

[0036] It should be noted that a wire outlet hole 20 is provided on the side of the second inner hoop 2 , and the component lead wire 12 located at the top of the second inner hoop 2 can pass through the wire outlet hole 20 .

[0037] The first inner hoop 1 and the second inner hoop 2 are sleeved in the outer hoop 3, and the outer hoop 3 is composed of two semicircular rings, and a bolt hole 30 is arranged at the connection between the two semicircular rings.

[0038] It should be noted that another alternative to the bolt hole 30 is to open a hole on the outer wall of the outer clamp 3 so that there are horizontal bolt holes in the two semicircular rings, and the outer clamp 3 is clamped on the wall sleeve 6 by bolts.

[0039] It should be noted that the first inner hoop 1 and the second inner hoop 2 are respectively composed of two semicircular rings, and magnetic isolation pads are arranged on the connecting parts of the semicircular rings.

[0040] In this embodiment, the wall sleeve 6 is sleeved with two sealing rings 4 , which are symmetrically arranged on both sides of the outer hoop 3 , and the outer diameter of the sealing ring 4 is greater than the outer diameter of the first inner hoop 1 and the second inner hoop 2 .

[0041] It should be noted that a wall flange 5 is arranged in the middle position of the wall sleeve 6, and the wall flange 5 is embedded in the wall, so that the wall sleeve 6 is arranged outdoors and indoors respectively, and temperature monitoring devices are arranged on the wall sleeve 6 in both the indoor and outdoor parts and close to the wall flange 5.

[0042] In this embodiment, a sealing groove 41 is provided on the inner wall of the sealing ring 4. A sealing ring 41 is provided in the sealing groove 41 for protecting the temperature measuring element 10 so as to make the temperature monitoring device waterproof and sealed.

[0043] In this embodiment, the component lead wire 12 is sheathed in the shielding sheath 13. The shielding sheath 13 is a braided copper mesh sheath for shielding interference of a strong electric field on the measurement signal and can be well grounded during use.

[0044] In this embodiment, the outer edges of the outer clamp 3 and the sealing ring 4 are rounded. This arrangement improves the distribution of the induced electric field and avoids field concentration.

[0045] In this embodiment, a temperature measuring element pad is provided on the inner wall of the first inner hoop.

[0046] In this embodiment, the clamp is made of aluminum alloy.

[0047] In another embodiment, the temperature measuring element 10 is a wireless transmission type temperature measuring element, and the external controller requires a wireless signal receiving device to receive signals.

[0048] The external controller is an existing device and will not be described in detail here.

[0049] Working principle:

[0050] Temperature sensing: Temperature changes in the environment will cause the resistance or output voltage of each temperature measuring element to change. This change reflects the temperature information at the location of the temperature measuring element.

[0051] Signal transmission: The temperature measuring element transmits the temperature change signal to the top of the second inner clamp through its lead wire. These signal wires are usually shielded to reduce the impact of electromagnetic interference on the signal.

[0052] External control: The signal line connected to the second inner clamp is directly connected to an external controller, such as a data acquisition system or a monitoring terminal. The external controller is responsible for receiving and processing the temperature data from each temperature measuring element.

[0053] Structural advantages:

[0054] Cost-effectiveness: Compared with infrared thermal imaging, this device adopts a distributed point temperature measurement method, which is lower in cost and suitable for large-scale applications.

[0055] Monitoring accuracy and efficiency: The layout is uniform and precise, which reduces the risk of capacitive screen breakdown and improves monitoring efficiency and accuracy.

[0056] Waterproof seal: The setting of sealing ring and sealing groove protects the temperature measuring element from moisture and ensures long-term stable monitoring performance.

[0057] Electromagnetic shielding: The lead wires of the components are shielded by sheaths to effectively shield strong electric field interference and ensure the accuracy of the measurement signal.

[0058] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A temperature monitoring device for a dry-type high-voltage wall bushing, comprising: A wall bushing (6) and a wall flange (5) arranged on the wall bushing (6), characterized in that temperature measuring components are sleeved on both sides of the wall bushing (6) located on the wall flange (5); The temperature measuring component comprises: a first inner hoop (1), a second inner hoop (2), and a plurality of temperature measuring elements (10) arranged in a circular array along the inner wall of the first inner hoop (1), wherein the sensing end of the temperature measuring element (10) is connected to an element lead wire (12); The first inner hoop (1) and the second inner hoop (2) are connected to each other in one piece; A wire groove (11) is provided on the inner wall of the second inner hoop (2), and the wire groove (11) is used to accommodate a component lead wire (12). The component lead wire (12) extends toward the top of the second inner hoop (2) along the groove direction of the wire groove (11), and the extension portion is connected to an external controller through a hole provided in the second inner hoop (2).

2. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 1 is characterized in that: Also includes: The outer hoop (3) is composed of two semicircular rings, and the first inner hoop (1) and the second inner hoop (2) contained in the outer hoop (3) are clamped on the wall sleeve (6) through bolt holes (30) provided at the connection between the semicircular rings.

3. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 2 is characterized in that: The first inner hoop (1) and the second inner hoop (2) are respectively composed of two semicircular rings, a magnetic isolation pad is arranged on the connecting parts of the semicircular rings, and a temperature measuring element pad is arranged on the inner wall of the first inner hoop (1).

4. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 2 is characterized in that: The wall bushing (6) is sleeved with two sealing rings (4), the two sealing rings (4) are symmetrically arranged on both sides of the outer hoop (3), and the outer diameter of the sealing ring (4) is greater than the outer diameter of the first inner hoop (1) and the second inner hoop (2).

5. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 4 is characterized in that: The inner wall of the sealing ring (4) is provided with a sealing groove (40), and a sealing ring (41) is provided in the sealing groove (40) for protecting the temperature measuring element (10).

6. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 1, characterized in that: The component lead wire (12) is sleeved in a shielding sheath (13), and the shielding sheath (13) is a braided copper mesh sheath.

7. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 1, characterized in that: The second inner hoop (2) is provided with a wire outlet hole (20) for extending the component lead wire (12) to the outside.

8. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 4, characterized in that: The outer edges of the outer hoop (3) and the sealing ring (4) are rounded.

9. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 1, characterized in that: There are six temperature measuring elements (10), each of which is arranged around the center of the first inner hoop (1), and each of which is arranged at an angle of 60°.

10. The temperature monitoring device for dry-type high-voltage wall bushing according to claim 1, characterized in that: The temperature measuring component is made of stainless steel.

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