Enclosed bus box surface temperature measurement sensor

Abstract

The utility model discloses an enclosed bus casing surface temperature measurement sensor, comprising an enclosed bus casing, a temperature detection point, a buffer spring, a temperature measurement probe, an optical fiber, a fixing member and an optical fiber connector, the temperature measurement probe is fixedly connected to one end of the optical fiber, the temperature detection point is connected to the end portion of the temperature measurement probe, and the buffer spring is connected to the end portion of the temperature measurement probe. The temperature detection point is arranged at one end of the optical fiber, the fixing piece is sleeved on the outer side of the optical fiber, the fixing piece can slide along the length direction, the buffer spring is arranged between the temperature detection point and the fixing piece, the optical fiber connector is fixedly connected to the other end of the optical fiber, and a mounting piece is arranged on the sealing female shell. The buffer spring is arranged between the temperature detection point and the temperature measurement probe, and after the fixing piece is installed and fixed on the installation piece, the buffer spring is used for applying continuous force to the temperature detection point to ensure that the temperature detection point is in continuous and reliable contact with the sealing busbar shell, accurate positioning and continuous and effective contact with the sealing busbar for temperature measurement are achieved, and the temperature measurement accuracy is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of busbar temperature measurement, in particular to a closed busbar box surface temperature measurement sensor. Background Art

[0002] The enclosed busbar (abbreviated as enclosed busbar) is composed of conductive bars, insulating materials, etc., and is a busbar system with a metal protective box on the outside. It is widely used for high-current transmission in the lead-out line circuits and plant branch circuits of generators of 50MW and above, and is an important auxiliary electrical equipment for generator sets. The box is one of the important components of the enclosed busbar. During normal operation, it is in an alternating magnetic field, generating induced current and heating, and the temperature rises due to the thermal radiation of the conductor current, resulting in a high overall temperature. Affected by the installation process, the resistance at the bolt connection points of the enclosed busbar shell is large, while the current density is large, resulting in more heat and prone to local high temperatures. Although the main heating risk points of the enclosed busbar are at the conductor connection points, optical fiber temperature measurement can directly measure the conductor temperature. However, in some locations where it is impossible to directly install temperature sensors on the conductors, temperature measurement on the surface of the busbar box can also indirectly reflect the temperature inside the busbar. Therefore, it is necessary to perform temperature monitoring on the high-temperature risk points of the enclosed busbar shell.

[0003] A search revealed Chinese patent publication number CN213336525U, which discloses a temperature measurement device for a seal housing. The device comprises a fixed unit and a movable unit. The fixed unit comprises a fixed joint fixed to the inner wall of the seal housing, a base connected to the fixed joint and fixed to the outer wall of the seal housing. The movable unit is fixed to the base and comprises a housing located outside the movable unit and fixedly connected to the base, and a movable mechanism mounted within the housing. This solution uses infrared temperature measurement, which cannot accurately and continuously obtain temperature. It does not measure the seal housing conductor, and its installation structure is complex.

[0004] Affected by the conductor structure, large current and electromagnetic characteristics of the sealed motherboard, the existing temperature monitoring methods mostly use infrared probes to measure temperature; however, the accuracy of infrared temperature measurement is easily affected by the atmospheric absorption rate, surface emissivity of the object, dust and water vapor and other environmental factors, and the monitoring data is a local average temperature, which makes it difficult to accurately locate the hot spot. Therefore, it is necessary to develop a sealed motherboard temperature measurement device that can accurately locate the hot spot of the sealed motherboard and maintain effective contact. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a sealing and locking structure for the cable through-hole of an oil tank. A mounting seat is set on the seal mother shell as a mounting part, and a buffer spring is placed between the temperature detection point and the temperature measuring probe. After the fixing part is fixed on the mounting part, the buffer spring is used to apply continuous force to the temperature detection point to ensure that it is in continuous and reliable contact with the seal mother shell, thereby achieving accurate positioning, continuous and effective contact with the seal mother temperature measurement, and ensuring the accuracy of temperature measurement.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A surface temperature sensor for a closed busbar box comprises a sealed female shell, a temperature detection point, a buffer spring, a temperature probe, an optical fiber, a fixing part and an optical fiber connector. The temperature probe is fixedly connected to one end of the optical fiber, the temperature detection point is connected to the end of the temperature probe, the fixing part is sleeved on the outside of the optical fiber, the fixing part can slide along the length direction, the buffer spring is arranged between the temperature detection point and the fixing part, the optical fiber connector is fixedly connected to the other end of the optical fiber, a mounting part is provided on the sealed female shell, and the fixing part is connected and fixed to the mounting part, so as to make the temperature probe tightly adhere to the sealed female shell.

[0008] Preferably, a temperature probe threaded portion is provided on the outside of the temperature probe, a temperature detection point threaded hole is opened at one end of the temperature detection point, and the temperature detection point and the temperature probe are threadedly connected through the temperature detection point threaded hole and the temperature probe threaded portion.

[0009] Preferably, a limiting portion is provided at one end of the temperature detection point away from the temperature measuring probe, the buffer spring is sleeved on the outside of the temperature detection point and the temperature measuring probe, and one end of the buffer spring abuts against the side wall of the limiting portion.

[0010] Preferably, the diameter of the limiting portion is larger than the diameter of the temperature detection point.

[0011] Preferably, a receiving cavity is provided on a side of the fixing member close to the buffer spring, and the other end of the buffer spring is placed in the receiving cavity.

[0012] Preferably, the mounting member comprises a mounting seat fixedly connected to the female housing, and a threaded hole passing through the mounting seat is formed on the mounting seat.

[0013] Preferably, a fixing member threaded portion is provided on an outer wall of a side of the fixing member close to the temperature detection point, and the fixing member and the mounting seat are threadedly connected via the fixing member threaded portion and the threaded hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model provides a mounting seat as a mounting part on the sealing mother shell, passes the temperature measuring probe and the optical fiber through the through hole of the fixing part, sleeves the buffer spring on the outside of the temperature measuring probe and places it between the temperature measuring probe and the fixing part, and after the temperature measuring probe is pulled out a suitable distance, it is connected and locked to the temperature detection point so that the buffer spring is placed between the temperature detection point and the temperature measuring probe, and then the fixing part is fixed on the mounting part, the temperature detection point is placed in the threaded hole and contacts the sealing mother shell, and the buffer spring is pressed between the fixing part and the limit part of the temperature detection point to apply continuous force to the temperature detection point to ensure that it is in continuous and reliable contact with the sealing mother shell, thereby achieving accurate positioning, continuous and effective contact with the sealing mother temperature measurement, and ensuring the accuracy of temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the disassembled structure of the closed busbar box surface temperature sensor;

[0017] Figure 2 This is a schematic diagram of the connection structure between the surface temperature sensor of the closed busbar box and the mounting seat on the sealed busbar shell.

[0018] In the figure: 1. Temperature detection point; 101. Limiting part; 102. Threaded hole of temperature detection point; 2. Buffer spring; 3. Temperature probe; 301. Threaded part of temperature probe; 4. Optical fiber; 5. Fixing part; 501. Threaded part of fixing part; 6. Optical fiber connector; 7. Sealing mother shell; 8. Mounting seat; 801. Threaded hole. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example: See Figure 1-Figure 2, this embodiment provides a closed busbar box surface temperature sensor, including a sealed female shell 7, a temperature detection point 1, a buffer spring 2, a temperature probe 3, an optical fiber 4, a fixing part 5 and an optical fiber connector 6, the temperature probe 3 is fixedly connected to one end of the optical fiber 4, the temperature detection point 1 is connected to the end of the temperature probe 3, the fixing part 5 is sleeved on the outside of the optical fiber 4, the fixing part 5 is provided with a through hole for the optical fiber 4 to pass through, the fixing part 5 can slide along the length direction, the buffer spring 2 is arranged between the temperature detection point 1 and the fixing part 5, the optical fiber connector 6 is fixedly connected to the other end of the optical fiber 4, the sealed female shell 7 is provided with a mounting part, the fixing part 5 and the mounting part The connection and fixation are used to make the temperature measuring probe 3 close to the sealing mother shell 7. When in use, the temperature measuring probe 3 and the optical fiber 4 are passed through the through hole of the fixing part 5, and the buffer spring 2 is put on the outside of the temperature measuring probe 3 and placed between the temperature measuring probe 3 and the fixing part 5. After the temperature measuring probe 3 is pulled out to a suitable distance, it is connected and locked to the temperature detection point 1, so that the buffer spring 2 is placed between the temperature detection point 1 and the temperature measuring probe 3, and then the fixing part 5 is installed and fixed on the mounting part. Under the action of the buffer spring 2, a continuous force is applied to push the temperature detection point 1 to continuously and reliably contact with the sealing mother shell 7, thereby achieving accurate positioning, continuous and effective contact with the sealing mother temperature measurement, and ensuring the accuracy of temperature measurement.

[0021] In this embodiment, if Figure 1 As shown, a temperature probe threaded portion 301 is provided on the outside of the temperature probe 3, and a temperature detection point threaded hole 102 is provided at one end of the temperature detection point 1. The temperature detection point 1 and the temperature probe 3 are threadedly connected through the temperature detection point threaded hole 102 and the temperature probe threaded portion 301. The set temperature detection point threaded hole 102 and the temperature probe threaded portion 301 facilitate the quick and stable connection between the temperature detection point 1 and the temperature probe 3. The structure is simple, easy to implement, and convenient to operate.

[0022] In this embodiment, if Figure 1 As shown, a limiting portion 101 is provided at one end of the temperature detection point 1 away from the temperature measuring probe 3, and the diameter of the limiting portion 101 is larger than the diameter of the temperature detection point 1. The buffer spring 2 is sleeved on the outside of the temperature detection point 1 and the temperature measuring probe 3, and one end of the buffer spring 2 is in contact with the side wall of the limiting portion 101. A accommodating cavity is provided on the side of the fixing part 5 close to the buffer spring 2, and the other end of the buffer spring 2 is placed in the accommodating cavity. The buffer spring 2 is placed between the limiting portion 101 of the temperature detection point 1 and the fixing part 5, so that the buffer spring 2 can act on the temperature detection point 1, thereby pushing the temperature detection point 1, so that the temperature detection point 1 can be in continuous and reliable contact with the sealing mother shell 7.

[0023] In this embodiment, if Figure 1 and Figure 2As shown, the mounting part includes a mounting base 8 fixedly connected to the sealing mother shell 7. The mounting base 8 can be pre-welded and fixed at the hot spot of the sealing mother shell 7 to achieve accurate positioning of the temperature sensor. A threaded hole 801 is provided on the mounting base 8 to pass through it. A fixing part threaded portion 501 is provided on the outer wall of the fixing part 5 close to the temperature detection point 1. The fixing part 5 and the mounting base 8 are threadedly connected through the fixing part threaded portion 501 and the threaded hole 801. The fixing part 5 is connected and fixed to the mounting base 8 through the provided fixing part threaded portion 501 and the threaded hole 801. The temperature detection point 1 is placed in the threaded hole 801 and contacts the sealing mother shell 7. The buffer spring 2 is pressed and held between the fixing part 5 and the limiting portion 101 of the temperature detection point 1 to apply continuous force to the temperature detection point 1 to ensure that it is in continuous and reliable contact with the sealing mother shell 7, thereby ensuring continuous and effective contact with the sealing mother for temperature measurement.

[0024] In this embodiment, a protective structure is provided on the portion of the optical fiber 4 extending out of the fixing member 5 . The protective structure may be a corrugated tube or the like, which effectively protects the optical fiber 4 .

[0025] Working principle: When in use, the temperature measuring probe 3 and the optical fiber 4 are passed through the through hole of the fixing part 5, the buffer spring 2 is put on the outside of the temperature measuring probe 3 and placed between the temperature measuring probe 3 and the fixing part 5, and then the temperature measuring probe 3 is pulled out to a suitable distance, and the temperature detection point 1 and the temperature measuring probe 3 are threadedly connected through the temperature detection point threaded hole 102 and the temperature probe threaded part 301 to be locked and fixed, so that the buffer spring 2 is placed between the temperature detection point 1 and the temperature measuring probe 3, and then the fixing part 5 and the mounting seat 8 are threadedly connected through the fixing part threaded part 501 and the threaded hole 801 to be locked and fixed. The temperature detection point 1 is placed in the threaded hole 801 and contacts the sealing mother shell 7, and the buffer spring 2 is pressed between the fixing part 5 and the limiting part 101 of the temperature detection point 1, and is used to apply continuous force to the temperature detection point 1 to ensure that it is in continuous and reliable contact with the sealing mother shell 7, thereby achieving accurate positioning, continuous and effective contact with the sealing mother temperature measurement, and ensuring the accuracy of temperature measurement.

[0026] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A closed busbar box surface temperature sensor, comprising a sealed busbar housing (7), characterized in that: The invention also comprises a temperature detection point (1), a buffer spring (2), a temperature probe (3), an optical fiber (4), a fixing member (5) and an optical fiber connector (6); the temperature probe (3) is fixedly connected to one end of the optical fiber (4); the temperature detection point (1) is connected to the end of the temperature probe (3); the fixing member (5) is sleeved on the outside of the optical fiber (4); the fixing member (5) can slide along the length direction; the buffer spring (2) is arranged between the temperature detection point (1) and the fixing member (5); the optical fiber connector (6) is fixedly connected to the other end of the optical fiber (4); a mounting member is provided on the sealing mother shell (7); the fixing member (5) is connected and fixed to the mounting member, and is used to make the temperature probe (3) tightly attached to the sealing mother shell (7).

2. The closed busbar box surface temperature sensor according to claim 1, characterized in that: A temperature probe threaded portion (301) is provided on the outside of the temperature probe (3), a temperature detection point threaded hole (102) is provided at one end of the temperature detection point (1), and the temperature detection point (1) and the temperature probe (3) are threadedly connected via the temperature detection point threaded hole (102) and the temperature probe threaded portion (301).

3. The closed busbar box surface temperature sensor according to claim 1, characterized in that: A limiting portion (101) is provided at one end of the temperature detection point (1) away from the temperature measuring probe (3); the buffer spring (2) is sleeved on the outside of the temperature detection point (1) and the temperature measuring probe (3); and one end of the buffer spring (2) abuts against the side wall of the limiting portion (101).

4. The closed busbar box surface temperature sensor according to claim 3, characterized in that: The diameter of the limiting portion (101) is greater than the diameter of the temperature detection point (1).

5. The closed busbar box surface temperature sensor according to claim 3, characterized in that: A receiving cavity is provided on one side of the fixing member (5) close to the buffer spring (2), and the other end of the buffer spring (2) is placed in the receiving cavity.

6. The closed busbar box surface temperature sensor according to claim 1, characterized in that: The mounting member comprises a mounting seat (8) fixedly connected to the female sealing shell (7), and a threaded hole (801) passing through the mounting seat (8) is provided on the mounting seat (8).

7. The closed busbar box surface temperature sensor according to claim 1, characterized in that: A fixing member threaded portion (501) is provided on an outer wall of one side of the fixing member (5) close to the temperature detection point (1), and the fixing member (5) and the mounting seat (8) are threadedly connected via the fixing member threaded portion (501) and the threaded hole (801).

Images