A movable transformer cooling temperature sensing system detector

Abstract

The present invention relates to the technical field of temperature control of main transformers in substations, and in particular to an instrument used for providing temperature simulation when a naturally air-cooled transformer is tested for fan start and stop. A heating chamber and a cooling chamber are respectively provided in the outer shell of a movable transformer cooling temperature sensing system detector. A refrigerant placement tank is provided in the cooling chamber, and a heating wire is provided in the heating chamber. The heating wire is connected to a battery and a temperature testing device; the refrigerant placement tank is connected to the temperature testing device. The present invention provides a movable transformer cooling temperature sensing system detector, which can test the start and stop temperature data when detecting the start and stop of the transformer cooling fan. This solves the weak link that the original method can only test the fan start temperature, and the test of the fan stop temperature is inaccurate, which is prone to errors.

Description

Technical Field

[0001] The invention relates to the technical field of temperature control of a main transformer in a transformer substation, and in particular to an instrument for providing temperature simulation when a fan of a naturally air-cooled transformer is started or stopped during an experiment. Background Art

[0002] The traditional method of detecting fan start and stop relies on heating the fan probe with a hair dryer, and watering or natural cooling during cooling. The temperature is inaccurate and the speed is slow. It can only reflect that the fan can start and stop when it reaches a certain temperature, but the temperature is not calibrated. Summary of the invention

[0003] Purpose of the invention:

[0004] The present invention provides a movable transformer cooling temperature sensing system detector, which can test the start and stop temperature data when detecting the start and stop of the transformer cooling fan, thereby solving the weak link that the original method can only test the fan start temperature, but the test of the fan stop temperature is inaccurate and prone to errors.

[0005] Technical solution:

[0006] A movable transformer cooling temperature sensing system detector has a shell in which a heating chamber and a cooling chamber are respectively arranged, a refrigerant placement tank is arranged in the cooling chamber, a heating wire is arranged in the heating chamber, the heating wire is connected to a battery and a temperature testing device; the refrigerant placement tank is connected to the temperature testing device.

[0007] Furthermore, the top of the refrigerant tank is connected to the top of the inner side of the shell through an upper connecting rod, and the position of the refrigerant tank is limited by a limiting device.

[0008] Furthermore, an upper limit rod is provided on the connecting upper rod above the refrigerant tank, and a lower limit rod is provided on the tank body of the refrigerant tank. The upper limit rod and the lower limit rod are respectively slidably connected to the limit plates on both sides. A plurality of limit grooves are provided on the limit plates on both sides, and a limit slider moving groove is provided on one side of each limit groove. The limit slider moves in the limit slide groove and the limit slider moving groove.

[0009] Furthermore, a hollow ring is provided in the middle of the upper limit rod, and support rods are provided at both ends of the hollow ring; the hollow ring is sleeved on the connecting upper rod at the upper end of the refrigerant placement tank; and the two sections of the support rod are arranged on two side limit plates fixed on both sides of the shell.

[0010] Furthermore, the hollow cylinder in the middle of the lower limit rod has two sections as support rods, the hollow cylinder is sleeved on the tank body of the refrigerant placement tank, and the two ends of the support rod are arranged on the limit plates on both sides.

[0011] Furthermore, limit sliders are provided on the limit plates on both sides, and the limit sliders move on the limit grooves and the limit slider moving grooves. Vertical slide grooves perpendicular to the limit grooves are provided on the limit plates on both sides, and both ends of the upper limit rod and the lower limit rod slide on the vertical slide grooves, and the positions of both ends of the upper limit rod and the lower limit rod are limited by the limit sliders.

[0012] Furthermore, a cylindrical limiting sleeve is provided between the hollow ring in the middle of the upper limit rod and the connecting upper rod at the upper end of the refrigerant placement tank, and a plurality of pressure rings are provided between the two cylindrical limiting sleeves turned upside down.

[0013] Furthermore, the outer shell is divided into a heating chamber and a cooling chamber respectively through a heat insulation plate arranged in the middle, and a thermometer and a temperature probe insertion port are respectively provided at the upper end of the outer shell of the heating chamber and the cooling chamber. The thermometer is inserted into the outer shell, and the temperature sensing line is inserted into the heating chamber and the cooling chamber through the temperature probe insertion port.

[0014] Furthermore, the heating wires in the heating chamber in the housing are connected via an upper connecting rod, and the lower part of the heating wires is respectively connected to the battery and the temperature testing device.

[0015] Furthermore, a reflective cover is provided around the heating wire in the heating chamber.

[0016] Advantages and effects:

[0017] The present invention has the following advantages and beneficial effects:

[0018] (1) The experimental process of the present invention saves time, and the entire detector has a simple structure and is easy to carry.

[0019] (2) The present invention has the characteristics of being easy to use, having multiple uses in one machine, and protecting equipment.

[0020] (3) The heat of the electric heating wire is concentrated by the reflective cover to achieve stable and rapid heating; the position of the refrigerant is limited by the limit device to prevent the refrigerant from tilting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the tester.

[0022] Figure 2 It is a top view of the tester;

[0023] Figure 3 It is a schematic diagram of the structure inside the shell from a top view;

[0024] Figure 4 yes Figure 3 A top view of the interior of

[0025] Figure 5 It is a schematic diagram of the structure of the limiting plates on both sides;

[0026] Figure 6It is the upper limit rod structure diagram;

[0027] Figure 7 It is the structural diagram of the lower limit rod;

[0028] Figure 8 It is a top view of the upper limit rod;

[0029] Fig. 9 It is the AA section view of the upper limit rod;

[0030] Fig.10 It is the structural diagram of the cylinder limit sleeve;

[0031] Fig.11 It is a cross-sectional view of the cylindrical limit sleeve BB.

[0032] Description of reference numerals:

[0033] 1. Shell; 2. Heating wire; 3. Refrigerant placement tank; 4. Placement box for battery and temperature test device; 401. Temperature display screen; 5. Upper connecting rod; 6. Thermometer; 7. Temperature probe insertion port; 8. Reflection cover; 9. Limit device; 901. Limit plates on both sides; 902. Upper limit rod; 903. Lower limit rod; 904. Limit slider; 905. Limit groove, 906. Vertical slide groove; 907. Limit slider moving groove, 908. Cylinder limit sleeve; 909. Press ring. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] like Figure 1 , Figure 2 As shown, a movable transformer cooling temperature sensing system detector has a heating chamber and a cooling chamber respectively provided in the shell, a refrigerant placement tank 3 is provided in the cooling chamber, a heating wire 2 is provided in the heating chamber, and the heating wire 2 is connected to a battery and a temperature testing device; the refrigerant placement tank 3 is connected to the temperature testing device.

[0036] The shell 1 can be carried or dragged, and is filled with thermal insulation foam. The shell 1 is equipped with a heat insulation board inside to divide the shell 1 into two parts, respectively equipped with a heating chamber and a cooling chamber, and respectively set up a temperature probe insertion port, and the temperature of the heating chamber and the cooling chamber in the shell is monitored by a thermometer set on the top of the shell. The shell 1 can be a 5-8mm thick plastic snap box, and the heat insulation board or the filling inside the shell are all high thermal insulation foam to achieve a heat preservation effect. In addition to the existing temperature sensing line, the temperature probe insertion port can also be inserted with a bimetallic thermometer for monitoring.

[0037] like Figure 3 , Figure 4As shown, the top of the refrigerant tank 3 is connected to the top of the inner side of the housing 1 via an upper connecting rod 5 , and the position of the refrigerant tank 3 is limited by a limiting device 9 .

[0038] The upper end of the upper connecting rod 5 is fixed to the upper part of the housing, and the lower end of the upper connecting rod 5 is fixedly connected to the upper connecting rod of the refrigerant placement tank 3. The refrigerant placement tank 3 is generally filled with dry ice as a refrigerant. An injection port is provided on the refrigerant placement tank 3 to inject dry ice. Be careful of low temperature frostbite during the injection process, and pay attention to the injection amount. Since the temperature does not need to be too low, the injection amount is small.

[0039] like Figure 3 As shown, the limiting device 9 includes limiting plates 901 on both sides, an upper limiting rod 902, a lower limiting rod 903, and a limiting slider 904. The function of the limiting device 9 is to prevent the refrigerant tank 3 from changing position with the shaking of the tester, causing problems in the connection between the refrigerant tank 3 and the housing 1, while ensuring the stability of the refrigerant tank 3, limiting its shaking, and ensuring the safety of the tank body. Since dry ice and other refrigerants are added to the refrigerant tank 3 during the detection process, the connection between the refrigerant tank 3 and the housing may be damaged. In order to ensure that the test work can be completed even if the refrigerant tank 3 is damaged during the detection process, and to ensure that the refrigerant tank 3 does not shake, the dry ice or the refrigerant tank 3 is directly connected to the tested fan or equipment, especially the temperature detection equipment, causing damage to the equipment due to the test, therefore, a limiting device is set. It also ensures the safety of the tester.

[0040] like Figure 4 As shown, the upper connecting rod above the refrigerant placement tank 3 is provided with an upper limit rod 902, and the tank body of the refrigerant placement tank 3 is provided with a lower limit rod 903. The upper limit rod 902 and the lower limit rod 903 are respectively connected to the limit plates 901 on both sides in a sliding manner. The limit plates 901 on both sides are provided with a plurality of limit grooves 905, and each limit groove 905 is provided with a limit slider moving groove 907 on one side, and the limit slider 904 moves in the limit slide groove 905 and the limit slider moving groove 907. The two limit plates 901 on both sides are at the same horizontal height on the inner walls on the left and right sides of the cooling chamber, and the upper limit rod 902 and the lower limit rod 903 are respectively slid up and down in the vertical slide grooves 906 in the limit plates 901 on both sides. The height of the upper limit rod 902 and the lower limit rod 903 can be adjusted through the vertical slide grooves, which is convenient for the later fixing or re-fixing of the refrigerant placement tank 3, and also convenient for the later injection of refrigerant, and the height of the limit can be adjusted as needed.

[0041] like Figure 6 , Figure 8 As shown, a hollow ring is provided in the middle of the upper limit rod 902, and support rods are provided at both ends of the hollow ring; the hollow ring is sleeved on the connecting upper rod at the upper end of the refrigerant placement tank 3; and the two sections of the support rod are arranged on the two side limit plates 901 fixed on both sides of the shell 1.

[0042] like Figure 7 As shown, the lower limit rod 903 is a hollow cylinder in the middle, and the two sections of the hollow cylinder are support rods. The hollow cylinder is sleeved on the tank body of the refrigerant placement tank 3, and the two ends of the support rod are arranged on the limit plates 901 on both sides.

[0043] like Figure 5 As shown, limiting slide blocks 904 are provided on the limiting plates 901 on both sides, and the limiting slide blocks 904 move on the limiting grooves 905 and the limiting slide block moving grooves 907. Vertical slide grooves 906 perpendicular to the limiting grooves 905 are provided on the limiting plates 901 on both sides, and both ends of the upper limiting rod 902 and the lower limiting rod 903 slide on the vertical slide grooves 906, and the positions of both ends of the upper limiting rod 902 and the lower limiting rod 903 are limited by the limiting slide blocks 904.

[0044] like Figure 5 As shown, the limit slider 904 can move horizontally. When limiting is required, the limit slider 904 is pushed to the limit slot 905 to ensure that both ends of the upper limit rod 902 and the lower limit rod 903 are limited to move downward by the limit slider 904, that is, the upper limit rod 902 and the lower limit rod 903 are limited in the vertical slide slot 906 by the limit slider 904. Figure 5 It is a schematic diagram. According to actual needs, multiple limit slots can be set.

[0045] like Fig. 9 As shown, a cylindrical limiting sleeve 908 is provided between the hollow ring in the middle of the upper limit rod 902 and the connecting upper rod at the upper end of the refrigerant placement tank 3, and a plurality of pressure rings 909 are provided between the two upside-down cylindrical limiting sleeves 908.

[0046] Since the connection between the upper connecting rod at the upper end of the refrigerant placement tank 3 and the upper connecting rod 5 can be welded or bolted, the connection is easily damaged by multiple low temperatures, and a cylindrical limiting sleeve 908 can be set in the middle of the upper limit rod 902, and multiple pressure rings are set on the cylindrical limiting sleeve 908, and the pressure rings are made of annular silicone material. Then another cylindrical limiting sleeve 908 turned 90 degrees is put on the pressure ring to ensure that the pressure ring is between the two cylindrical limiting sleeves 908, further ensuring the position of the connecting rod.

[0047] like Figure 1 , Figure 2 As shown, the shell 1 is divided into a heating chamber and a cooling chamber respectively through a heat insulation plate arranged in the middle, and a thermometer 6 and a temperature probe insertion port 7 are respectively arranged at the upper end of the shell 1 of the heating chamber and the cooling chamber. The thermometer 6 is inserted into the shell 1, and the temperature sensing line is inserted into the heating chamber and the cooling chamber through the temperature probe insertion port 7.

[0048] The temperature sensing line is a temperature sensing probe in the existing temperature test, which is used to test the real-time temperature inside the shell. Record the start and stop temperature of the fan. The insertion port of the temperature sensing probe is generally set as a round hole with a diameter of 5cm~10cm. On the one hand, it is convenient for inserting the temperature sensing probe, and on the other hand, it is convenient for subsequent observation of whether the fan has stopped. It can also be judged whether the fan has stopped by the sound of the fan turning.

[0049] like Figure 3 As shown, the heating wire 2 in the heating chamber in the housing 1 is connected via an upper connecting rod 5, and the lower part of the heating wire 2 is connected to the battery and the temperature testing device respectively.

[0050] A reflective cover 8 is provided around the heating wire 2 in the heating chamber.

[0051] The reflector is made of polished stainless steel and is an existing reflector. The upper and lower parts of the reflector are fixed to the upper and lower inner sides of the heating chamber of the shell.

[0052] like Figure 1 As shown, a placement box for a battery and a temperature testing device is provided on both sides of the heat insulation board of the shell, and the battery is used to power the temperature testing device. The temperature testing device is an existing temperature testing device. A temperature display screen 401 can also be provided on each side of the shell. The temperature display screen 401 is connected to the temperature testing device in the shell to display the temperature of the heating chamber and the cooling chamber in real time.

[0053] The invention is mainly used to test whether the transformer fan can meet the setting requirements, whether the fan can be turned on when the expected temperature is reached, generally 50-60°C, and whether the fan can be stopped after the temperature drops to a specified value.

[0054] The present invention uses the following process:

[0055] 1. Buckle the heating chamber of the tester outside the fan and the fan temperature sensing device, turn on the power switch in the heating chamber to heat from room temperature to 50~60 degrees, then stop heating. Observe through the temperature sensing probe insertion port whether the fan being tested can start as required and at what temperature it starts, and record the data.

[0056] 2. Inject dry ice into the refrigerant before testing Figure 1 Place the refrigerant in the tank, pay attention to controlling the amount of dry ice injected, and ensure that the temperature is controlled within the measured temperature range. Put the fan and the fan temperature sensing device in the cooling room, and observe whether the fan can stop as required through the temperature sensing probe insertion port.

[0057] 3. Determine whether the start and stop of the transformer fan meets the requirements based on the recorded temperature.

Claims

1. A movable transformer cooling temperature sensing system detector, characterized in that: A heating chamber and a cooling chamber are respectively provided in the housing, a refrigerant placement tank (3) is provided in the cooling chamber, a heating wire (2) is provided in the heating chamber, and the heating wire (2) is connected to the battery and the temperature testing device; the refrigerant placement tank (3) is connected to the temperature testing device; The top of the refrigerant placement tank (3) is connected to the top of the inner side of the outer shell (1) via an upper connecting rod (5), and the position of the refrigerant placement tank (3) is limited by a limiting device (9); An upper connecting rod above the refrigerant placement tank (3) is provided with an upper limit rod (902), and a lower limit rod (903) is provided on the tank body of the refrigerant placement tank (3). The upper limit rod (902) and the lower limit rod (903) are respectively slidably connected to the limit plates (901) on both sides. The limit plates (901) on both sides are provided with a plurality of limit grooves (905), and each limit groove (905) is provided with a limit slider moving groove (907) on one side. The limit slider (904) moves in the limit slide groove (905) and the limit slider moving groove (907). A hollow ring is provided in the middle of the upper limit rod (902), and support rods are provided at both ends of the hollow ring; the hollow ring is sleeved on the connecting upper rod at the upper end of the refrigerant placement tank (3); the two sections of the support rod are arranged on two side limit plates (901) fixed on both sides of the shell (1); The hollow cylinder in the middle of the lower limit rod (903), the two sections of the hollow cylinder are support rods, the hollow cylinder is sleeved on the tank body of the refrigerant placement tank (3), and the two ends of the support rod are arranged on the limit plates (901) on both sides; The limiting plates (901) on both sides are provided with limiting slide blocks (904), the limiting slide blocks (904) move on the limiting grooves (905) and the limiting slide block moving grooves (907), the limiting plates (901) on both sides are provided with vertical slide blocks (906) perpendicular to the limiting grooves (905), the upper limiting rod (902) and the lower limiting rod (903) slide on the vertical slide blocks (906), and the upper limiting rod (902) and the lower limiting rod (903) are limited in position by the limiting slide blocks (904); The outer shell (1) is provided with a heating chamber and a cooling chamber respectively through a heat insulation plate arranged in the middle. The upper ends of the outer shells (1) of the heating chamber and the cooling chamber are provided with a thermometer (6) and a temperature probe insertion opening (7), respectively. The thermometer (6) is inserted into the outer shell (1), and the temperature sensing line is inserted into the heating chamber and the cooling chamber through the temperature probe insertion opening (7).

2. The movable transformer cooling temperature sensing system detector according to claim 1 is characterized in that: A cylindrical limiting sleeve (908) is provided between the hollow ring in the middle of the upper limit rod (902) and the upper connecting rod at the upper end of the refrigerant placement tank (3), and a plurality of pressure rings (909) are provided between the two cylindrical limiting sleeves (908) turned upside down.

3. The movable transformer cooling temperature sensing system detector according to claim 1 is characterized in that: The heating wire (2) in the heating chamber in the housing (1) is connected via an upper connecting rod (5), and the lower part of the heating wire (2) is respectively connected to a battery and a temperature testing device.

4. The movable transformer cooling temperature sensing system detector according to claim 1 is characterized in that: A reflective cover (8) is provided around the heating wire (2) in the heating chamber.

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