A device for testing the performance of watch strap springs

Abstract

This invention discloses a device for testing the performance of watch strap spring fingers, comprising: a base; a sealed oil tank fixed on the base; a watch strap finger shaft disposed on the upper part of the oil tank for mounting the watch strap fingers; a pressing device located directly above the middle position of the watch strap finger shaft for pressing down the watch strap fingers; and a lifting device disposed above the pressing device for controlling the lifting and lowering of the pressing device. By rotating the watch strap finger shaft and lifting and lowering the top pressing head, each spring piece of the watch strap fingers can be tested.

Description

Technical Field

[0001] This invention relates to the field of high-voltage insulating bushing testing equipment, and in particular to a device for testing the performance of watch strap spring contact fingers. Background Technology

[0002] The metering contact finger connection structure between the bushing and winding in the riser area of ​​the UHV converter transformer valve side requires each current-carrying contact finger to maintain a relatively uniform current-carrying contact area and low contact resistance over a long period to achieve uniform current shunting and low-temperature operation. However, the metering contact fingers are affected by factors such as contact force, contamination layer, roughness, material properties and electroplating layer, and operating temperature, making it difficult to achieve uniform current shunting. Domestic and foreign converter transformer and bushing manufacturers have not fully mastered the precision configuration and process control requirements of the metering contact fingers between the bushing and winding under various influencing factors. After on-site installation, if it cannot be ensured that all contact fingers are evenly stressed, under the influence of long-term high operating ambient temperature, strong load current, equipment vibration, and contact surface contamination layer, it is impossible to completely avoid the occurrence of local overheating and burning problems of the metering contact fingers.

[0003] The existing connection configuration of the gauge band contact fingers between the bushing and winding of the UHV converter transformer cannot completely avoid the problem of overheating and burning of the gauge band contact fingers during long-term operation, thus failing to guarantee the safe operation of the gauge band spring contact fingers. Currently, no effective solution has been proposed. Summary of the Invention

[0004] This disclosure provides a device for testing the performance of the watch band spring contact, which at least solves the technical problem that the existing connection configuration of the watch band contact between the bushing and winding of the UHV converter valve cannot completely avoid the problem of overheating and burning of the watch band contact during long-term operation, thus failing to guarantee the safe operation of the watch band spring contact.

[0005] According to one aspect of the present invention, a watch strap spring finger performance testing device is provided, comprising:

[0006] Base;

[0007] A sealed oil tank fixed to the base;

[0008] The watch strap finger shaft, located at the top of the fuel tank, is used to install the watch strap fingers;

[0009] The pressure device, located directly above the center of the watch band's finger axis, is used to press down the watch band's fingers.

[0010] A lifting device installed at the top of the pressure contact device is used to control the lifting and lowering of the pressure contact device.

[0011] Optionally, the lifting device is fixedly connected to the oil tank via a top mounting plate disposed on the top of the oil tank, and the lifting device includes:

[0012] A power transmission mechanism mounted on a top mounting bracket;

[0013] A lifting reducer connected to the input end of a power transmission mechanism, wherein the output end of the lifting reducer is connected to the power transmission mechanism, and the input end of the lifting reducer is equipped with a lifting handwheel;

[0014] The lifting nut, located at the lower end of the power transmission mechanism, moves up and down via the lifting handwheel;

[0015] A lifting shaft is located at the lower end of the lifting screw nut, and the lifting shaft is inserted into the oil tank through the upper end face of the oil tank.

[0016] Optionally, the pressure contact device includes: a pressure contact plate disposed on the lower end face of the lifting shaft and a top pressure contact protruding from the lower end of the pressure contact plate, wherein the top pressure contact and the pressure contact plate are an integral structure made of copper.

[0017] Optionally, it also includes: a thermocouple disposed on the pressure contact plate to detect the temperature at the pressure contact plate when energized.

[0018] Optionally, the lifting shaft is connected to the lifting nut via a top lead plate.

[0019] Optionally, it also includes: a vacuum pump and an oil tank located at the bottom of the oil tank, wherein

[0020] The vacuum pump is connected to the oil tank through the first pipeline, and the oil tank is connected to the oil tank through the second pipeline.

[0021] Optionally, it also includes:

[0022] A first switch tee is installed on the first pipeline, and a first syringe is installed on the first switch tee.

[0023] A second switch tee is installed on the second pipeline, and a second syringe is installed on the second switch tee.

[0024] Optionally, it also includes:

[0025] A syringe driving device for mounting a first syringe and a second syringe, wherein the syringe driving device includes a frame made of spliced ​​steel plates, wherein

[0026] The frame has an opening at the top, and a first syringe or a second syringe is placed inside the frame. An end plate and a bottom support plate are fixed inside the frame. The injection head of the first syringe / second syringe passes through a round hole on the end plate, and the bottom support plate supports the rear end of the first syringe / second syringe.

[0027] Optionally, the frame also houses an electric actuator and a drive plate, wherein

[0028] The drive plate is slidably connected inside the frame along the length of the first / second syringe. The drive plate presses against the push plate of the first / second syringe. The electric push rod is connected to the drive plate, and the movement of the drive plate is achieved by the retraction of the electric push rod.

[0029] A root guide post is fixed inside the frame, and the root guide post passes through the drive plate for guidance.

[0030] Optionally, it also includes two current-introducing terminals disposed at the bottom of the tank, the current-introducing terminals being used to introduce current.

[0031] Optionally, it also includes:

[0032] A rotary reducer located on one side of the oil tank is used to subdivide the 360 ​​degrees, control the precise positioning of the watch strap fingers, and the input end of the rotary reducer is equipped with a rotary handwheel.

[0033] Optionally, the output end of the rotary reducer extends into the oil tank and is fixedly connected to a first contact finger shaft mounting plate. A second contact finger shaft mounting plate is mounted on the other side of the oil tank, and a slewing bearing is installed between the second contact finger shaft mounting plate and the oil tank. The first and second contact finger shaft mounting plates are symmetrically arranged on the left and right sides.

[0034] The watch strap finger pivot is installed between the first finger pivot mounting plate and the second finger pivot mounting plate.

[0035] Optionally, the watch strap finger shaft is a horizontal cylinder with a cylindrical boss at each end. Two slots corresponding to the ends of the watch strap fingers are opened on the opposite surfaces of the two bosses. The two ends of the watch strap fingers are inserted into the two slots respectively, and the watch strap fingers move within the circular slots. A mounting groove is also opened on the boss, which extends through into the slots, and the watch strap fingers enter the slots through the mounting groove.

[0036] Optionally, a square positioning block is provided at each end of the watch strap finger shaft. The finger shaft mounting plate is provided with a groove in the same direction as the positioning block. The watch strap finger shaft is fixed by inserting the two positioning blocks into the grooves of the two finger shaft mounting plates. The positioning blocks are provided with cable mounting holes. Any current inlet terminal is connected to the cable mounting hole through a cable to introduce current into the watch strap finger shaft.

[0037] Optionally, it also includes:

[0038] A displacement sensor is installed on the top mounting base, with its lower end in contact with the upper end of the top lead plate, to detect the lifting stroke of the top lead plate.

[0039] Optionally, the pressure plate and the lifting shaft are detachably connected by bolts, and the pressure plate can be disassembled and installed as a pressure sensor. The pressure sensor is used to detect the relationship between the amount of pressure applied by a single watch strap finger and the downward force.

[0040] Optionally, it also includes:

[0041] Two electrical plugs located at the bottom of the oil tank are used to transmit signals from the thermocouple and pressure sensor to the display device.

[0042] Alternatively, the power transmission mechanism is a worm gear reducer.

[0043] Therefore, the watchband spring contact finger performance testing device provided in this application, by controlling the rotation of the watchband contact finger shaft and the lifting of the top pressure contact head through a lifting device, can test each spring piece of the watchband contact finger. This achieves the technical effect of accurately testing each spring piece of the watchband spring contact finger. Furthermore, it solves the technical problem in the existing technology where the connection configuration of the watchband contact fingers between the valve-side bushing and winding of the UHV converter transformer cannot completely avoid the problem of overheating and erosion of the watchband contact fingers during long-term operation.

[0044] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0045] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0046] Figure 1 This is a schematic diagram of the watch strap spring touch finger performance testing device according to an embodiment of the present invention;

[0047] Figure 2 This is a front view of the watch strap spring touch finger performance testing device according to an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the internal structure of the fuel tank according to an embodiment of the present invention;

[0049] Figure 4 This is a bottom view of the watch strap spring touch finger performance testing device according to an embodiment of the present invention;

[0050] Figure 5 This is a left view of the watch strap spring touch finger performance testing device according to an embodiment of the present invention;

[0051] Figure 6This is a schematic diagram of the finger shaft mounting plate structure according to an embodiment of the present invention;

[0052] Figure 7 This is a schematic diagram of the top pressure contact structure according to an embodiment of the present invention;

[0053] Figure 8 This is a schematic diagram of the watch strap finger shaft structure according to an embodiment of the present invention;

[0054] Figure 9 This is a front view of the watch strap finger axis according to an embodiment of the present invention;

[0055] Figure 10 for Figure 9 The AA section view of the watch strap's finger axis is shown.

[0056] Figure 11 This is a schematic diagram of the syringe driving device according to an embodiment of the present invention;

[0057] Figure 12 This is a top view of the syringe driving device according to an embodiment of the present invention;

[0058] Figure 13 for Figure 12 The syringe drive device shown is a BB-side cross-sectional view.

[0059] Figure 14 This is a schematic diagram illustrating the connection between the oil tank, vacuum pump, and oil container as described in an embodiment of the present invention.

[0060] 1. Oil tank; 2. Rotary reducer; 3. Rotary handwheel; 4. Lifting reducer; 5. Lifting handwheel; 6. Worm gear reducer; 7. Lifting nut; 8. Top lead plate; 9. Displacement sensor; 10. Base; 11. Top mounting base; 12. Lifting shaft; 13. Pressure contact plate; 14. Thermocouple; 15. Top pressure contact; 16. Watchband contact finger shaft; 17. Contact finger shaft mounting plate; 18. Slewing bearing; 19. Current inlet terminal; 20. 21. Connecting port, 22. Electrical plug, 23. Positioning block, 24. Cable mounting hole, 25. Slot, 26. Mounting slot, 27a. Frame, 27b. First syringe, 27b. Second syringe, 28. End plate, 29. Bottom support plate, 30. Drive plate, 31. Guide post, 32. Electric push rod, 33. Oil tank, 34. Vacuum pump, 35. Syringe drive device, 36. Settling tank, K1. First switch tee, K2. Second switch tee. Detailed Implementation

[0061] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0062] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Figure 1 This is a schematic diagram of the watchband spring contact finger performance testing device according to an embodiment of the present invention. The device is used to verify the relationship between the gas generation rate, compression, contact pressure, contact resistance, and current carrying capacity of the watchband contact finger under operating conditions.

[0066] refer to Figure 2 As shown in the front view of the watch strap spring touch performance testing device, the present invention includes a base 10 and a sealed oil tank 1 fixed on the base 10. The oil tank 1 is formed by connecting multiple steel plate bolts and is square in shape.

[0067] refer to Figure 2 and Figure 3 , Figure 6As shown, a rotary reducer 2 is connected to one side of the oil tank 1. A rotary handwheel 3 is installed at the input end of the rotary reducer 2. The output end of the rotary reducer 2 extends into the oil tank 1 and is fixedly connected to a finger shaft mounting plate 17. Another finger shaft mounting plate 17 is also installed on the other side of the oil tank 1. A rotary bearing 18 is installed between the finger shaft mounting plate 17 on the other side and the oil tank 1. The two finger shaft mounting plates 17 are arranged symmetrically on the left and right.

[0068] A watch strap finger hinge 16 is installed between the two finger hinge mounting plates 17, such as... Figure 8 , 9 As shown in Figure 10, the watch strap finger shaft 16 is a horizontal cylindrical shape. Each end of the cylinder has a cylindrical boss. On the opposite surfaces of the two bosses, there are slots 24 corresponding to the ends of the watch strap fingers. The two ends of the watch strap fingers are respectively inserted into the two slots 24. At the same time, the watch strap fingers can move within the circular slots 24, so that the entire watch strap fingers are inserted into the slots 24. There is also a mounting groove 25 on the boss. The mounting groove 25 extends into the slots 24, and the watch strap fingers enter the slots 24 through the mounting groove 25.

[0069] like Figure 6 As shown, a square positioning block 22 is provided at each end of the watch strap finger shaft 16. The finger shaft mounting plate 17 is provided with a groove 36 in the same direction as the positioning block 22. The watch strap finger shaft 16 is fixed by inserting the two positioning blocks 22 into the grooves of the two finger shaft mounting plates 17.

[0070] like Figure 6 As shown, the finger shaft mounting plate 17 is a split structure. The part on one side of the sink is connected to the main body by bolts, so that the positioning block 22 can be moved into the sink from that side. After entering, the part on one side of the sink is connected by bolts, so that the positioning block 22 is fixed in the sink 36.

[0071] like Figure 4 As shown, the bottom of the oil tank 1 is equipped with two current inlet terminals 19, and the positioning block 22 has a cable mounting hole 23. Any one of the current inlet terminals 19 is connected to the cable mounting hole 23 through a cable, thereby introducing current into the watch strap finger shaft 16.

[0072] like Figure 2 and Figure 5 As shown, the top of the oil tank 1 is bolted to a top mounting base 11, on which a worm gear reducer 6 is mounted. The input end of the worm gear reducer 6 is connected to the output end of the lifting reducer 4. The input end of the lifting reducer 4 is equipped with a lifting handwheel 5. The lower end of the worm gear reducer 6 is equipped with a lifting nut 7 for vertical movement. By rotating the lifting handwheel 5, the lifting nut 7 can be moved up and down. The resolution of the vertical movement of the lifting nut 7 is 0.01mm.

[0073] The lower end of the lifting wire nut 7 is equipped with a top lead plate 8, which is a horizontal copper plate connected to the current lead wire. The lower end face of the top lead plate 8 is equipped with a lifting shaft 12, which passes through the upper end face of the oil tank 1 and is inserted into the oil tank 1. A sealing ring is installed between the lifting shaft 12 and the oil tank 1 to provide a seal.

[0074] A displacement sensor 9 is mounted on the top mounting base 11. The lower end of the displacement sensor 9 rests on the top lead plate 8 to detect the lifting stroke of the top lead plate 8.

[0075] refer to Figures 7-9 As shown, a pressure contact plate 13 is mounted on the lower end face of the lifting shaft 12. A top pressure contact 15 protrudes from the lower end of the pressure contact plate 13. The top pressure contact 15 is located directly above the middle position of the watch strap finger shaft 16. The top pressure contact 15 and the pressure contact plate 13 are an integral structure made of copper. The width of the top pressure contact 15 corresponds to the individual finger of the watch strap finger, so that the individual watch strap finger can be pressed down through the top pressure contact 15.

[0076] refer to Figure 3 As shown, the pressure contact plate 13 is connected to the lifting shaft 12 by bolts. The pressure contact plate 13 can be removed and replaced with a pressure sensor. The pressure sensor has a pressure detection accuracy of up to 0.5% and a resolution of 0.01N. By pressing the pressure sensor onto a single watch strap finger, the relationship between the amount of pressure applied to the single watch strap finger and the downward force can be detected.

[0077] refer to Figure 7 As shown, a thermocouple 14 is installed on the pressure contact plate 13 to detect the temperature at the pressure contact plate 13 when energized, and the temperature detection resolution can reach 0.01℃.

[0078] like Figure 4 and Figure 14 As shown, the bottom of the oil tank 1 is equipped with two electrical plugs 21, used to transmit signals from the thermocouple 14 and the pressure sensor to the display device. The bottom of the oil tank 1 has two communication ports 20, as shown... Figure 1 As shown, it also includes a vacuum pump 34 and an oil tank 33. The vacuum pump 34 is connected to a connection port 20 through a pipeline, and the oil tank 33 is connected to another connection port 20 through a pipeline. A three-way switch K1 is installed on the pipeline of the vacuum pump 34, and a 1000mL first syringe 27a is connected to the three-way switch K1. A three-way switch K2 is installed on the pipeline of the oil tank, and a 100mL second syringe 27b is connected to the three-way switch K2.

[0079] refer to Figure 11-12As shown, a 1000mL first syringe 27a is mounted on a syringe driving device. The syringe driving device includes a frame 26 made of steel plates. The upper end of the frame 26 is open. The 1000mL first syringe 27a is placed inside the frame 26. An end clamping plate 28 and a bottom support plate 29 are fixed inside the frame 26. The injection head of the 1000mL first syringe 27a passes through a round hole on the end clamping plate 28. The bottom support plate 29 supports the rear end of the 1000mL first syringe 27a.

[0080] refer to Figure 12-13 As shown, the frame 26 also contains an electric push rod 32 and a drive plate 30. The drive plate 30 is slidably connected inside the frame 26 along the length direction of the first syringe 27a / second preliminary device 27b. The drive plate 30 presses on the push plate of the 1000mL first syringe 27a. Four guide posts 31 are fixed inside the frame 26. The four guide posts 31 pass through the drive plate 30 and play a guiding role. The electric push rod 32 is connected to the drive plate 30. The movement of the drive plate 30 is achieved by the retraction of the electric push rod 32, thereby pressing the 1000mL first syringe 27a.

[0081] Method of using this invention:

[0082] This invention investigates the relationship between watch band compression and clamping force, watch band compression and contact resistance, and watch band compression and current carrying capacity through experiments on the finger contact performance of the watch band in a closed oil chamber; it also studies the gas generation rate at different watch band temperatures.

[0083] 1. Watch strap finger pressure and compression (without oil)

[0084] With the oil tank 1 empty, a pressure sensor is installed on the lower end face of the lifting shaft 12. By rotating the lifting handwheel 5, the pressure sensor is moved downward a certain distance from its initial position. The pressure sensor value is measured on one side after each downward movement. After measuring one spring plate of the watch strap finger, the rotating handwheel 3 is rotated to rotate one spring plate of the watch strap finger shaft. Then, a second measurement is performed to measure the relationship between the clamping force and the compression amount of each spring plate of the watch strap finger.

[0085] 2. Compression of the watch strap contacts and contact resistance (oil-free)

[0086] With the oil tank 1 empty, the top pressure contact 15 is installed on the lower end face of the lifting shaft 12, and a 50A DC current is passed between the top lead plate 8 and the current input terminal 19. By rotating the lifting handwheel 5, the top pressure contact 15 is moved downward from the initial position by a certain distance. Every time it is pressed down a certain distance, the voltage is measured with a digital multimeter and the contact resistance is calculated.

[0087] After measuring one spring plate of the watch strap finger, rotate the rotating handwheel 3 to rotate the watch strap finger shaft by one spring plate, and then perform the second measurement.

[0088] 3. Watch strap finger pressure and compression (oil filling)

[0089] With the oil tank 1 filled with oil, a pressure sensor is installed on the lower end face of the lifting shaft 12. By rotating the lifting handwheel 5, the pressure sensor is moved downward a certain distance from its initial position. After each certain distance is pressed down, the value of the pressure sensor on one side is measured. After measuring one spring plate of the watch strap finger, the rotating handwheel 3 is rotated to rotate one spring plate of the watch strap finger shaft. Then, a second measurement is performed to measure the relationship between the clamping force and the compression amount of each spring plate of the watch strap finger.

[0090] (You can select only one new watch strap and one old watch strap for measurement and comparison. If there is no obvious difference, you do not need to test all watch straps.)

[0091] 4. Compression of the watch strap contacts and contact resistance (oil filling)

[0092] With the oil tank 1 filled with oil, the top pressure contact 15 is installed on the lower end face of the lifting shaft 12, and a 50A DC current is passed between the top lead plate 8 and the current input terminal 19. By rotating the lifting handwheel 5, the top pressure contact 15 is driven to move downward a certain distance from the initial position. Every time it is pressed down a certain distance, the voltage is measured with a digital multimeter and the contact resistance is calculated.

[0093] After measuring one spring plate of the watch strap finger, rotate the rotating handwheel 3 to rotate the watch strap finger shaft by one spring plate, and then perform the second measurement.

[0094] (You can select only one new watch strap and one old watch strap for measurement and comparison. If there is no obvious difference, you do not need to test all watch straps.)

[0095] 5. Measurement of strap finger compression and temperature

[0096] With the oil tank 1 filled with oil, the top pressure contact 15 is installed on the lower end face of the lifting shaft 12. By rotating the lifting handwheel 5, the top pressure contact 15 is driven to move downward a certain distance from the initial position. Every time it is pressed down a certain distance, a 50A DC current is briefly passed between the top lead plate 8 and the current introduction terminal 19. Thermocouple 14 is used to measure the contact point temperature of the contact finger surface.

[0097] After measuring one spring plate of the watch strap finger, rotate the rotating handwheel 3 to rotate the watch strap finger shaft by one spring plate, and then perform the second measurement.

[0098] 6. Measurement of strap contact temperature and gas production rate

[0099] With the oil tank 1 filled with oil, apply different compression amounts to each spring plate of the watch strap contact finger, and apply a DC current of 50A or higher amplitude for a long time (maintain for a relatively long time). Use a thermocouple to measure the contact point temperature of the contact finger surface, record the gas content in the oil before and after reaching the target temperature (to be determined) for a certain period of time, calculate the gas generation rate, and convert it to the gas generation rate of the converter transformer based on the total oil volume of the sealed cavity and the converter transformer.

[0100] Oil filling and oil extraction methods:

[0101] like Figure 14 As shown: Before filling with oil, first close the second switch three-way K2 and open the first switch three-way K1. Use a vacuum pump to evacuate the oil tank 1. Then close the switch three-way K1 and open the second switch three-way K2. The oil tank 1 will draw the oil from the oil tank into the oil tank 1. Close the second switch three-way K2 and the first switch three-way K1, and then conduct the test.

[0102] After the test is completed, open the second switch K2 and the first switch K1. The electric push rod 32 drives the drive plate 30 to move, and the carrier gas or oil in the 1000mL first syringe 27a is injected into the pipeline, which presses the oil sample in the oil tank 1 into the 100mL second syringe 27b, thereby achieving oil extraction through the 100mL second syringe 27b.

[0103] Therefore, the watchband spring contact finger performance testing device provided in this application can test each spring plate of the watchband contact finger by rotating the watchband contact finger shaft and raising and lowering the top pressure contact. The device allows for testing of the energizing method, temperature detection method, pressure detection method, and sampling method of the watchband contact finger shaft. This verifies the relationship between the gas generation rate, compression, contact pressure, contact resistance, and current carrying capacity of the watchband contact finger under operating conditions. It solves the technical problem in existing technologies where the connection configuration of the watchband contact fingers between the valve-side bushing and winding of the UHV converter transformer cannot completely prevent overheating and erosion of the watchband contact fingers during long-term operation.

[0104] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0105] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0106] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0107] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for using a watch strap spring touch finger performance testing device, characterized in that, The watch strap spring finger contact performance testing device includes: Base; A sealed oil tank fixed to the base; The watch strap finger shaft located on the upper part of the fuel tank is used to install the watch strap fingers. The pressure device located directly above the center of the watch strap finger axis is used to press down the watch strap finger. A lifting device is installed at the upper end of the pressure contact device to control the lifting of the pressure contact device; The lifting device is fixedly connected to the oil tank via a top mounting plate mounted on the top of the oil tank. The lifting device includes a power transmission mechanism mounted on the top mounting plate and a lifting reducer connected to the input end of the power transmission mechanism. The output end of the lifting reducer is connected to the power transmission mechanism, and the input end of the lifting reducer is equipped with a lifting handwheel. A lifting nut is located at the lower end of the power transmission mechanism and moves up and down via the lifting handwheel. A lifting shaft is located at the lower end of the lifting nut and is inserted into the oil tank through the upper end face of the oil tank. The pressure contact device includes a pressure contact plate disposed on the lower end face of the lifting shaft and a top pressure contact protruding from the lower end of the pressure contact plate. The top pressure contact and the pressure contact plate are an integral structure made of copper. The watch strap spring finger performance testing device also includes a thermocouple installed on the pressure contact plate to detect the temperature of the pressure contact plate when energized, and a rotary reducer installed on one side of the oil tank to subdivide the 360 ​​degrees and control the precise positioning of the watch strap finger. The input end of the rotary reducer is equipped with a rotary handwheel. The lifting shaft is connected to the lifting nut via a top lead plate; two current inlet terminals are provided at the bottom of the oil tank, and the current inlet terminals are used to introduce current. The method of using the aforementioned watchband spring finger performance testing device involves experimentally studying the relationship between watchband compression and clamping force, watchband compression and contact resistance, watchband compression and current carrying capacity, and the gas generation rate at different watchband temperatures through tests on the watchband finger performance in a sealed oil chamber. The process of detecting the clamping force and compression amount of the watch strap finger in the absence of oil in the oil tank is as follows: A pressure sensor is installed on the lower end face of the lifting shaft. By rotating the lifting handwheel, the pressure sensor is moved downward from the initial position by a certain distance. After each certain distance is pressed down, the value of the pressure sensor on one side is measured. After measuring one spring plate of the watch strap finger, the rotating handwheel is rotated to rotate one spring plate of the watch strap finger shaft. A second measurement is then performed to measure the relationship between the clamping force and compression amount of each spring plate of the watch strap finger. The process of detecting the compression and contact resistance of the watch band contact fingers in the absence of oil in the oil tank is as follows: The top pressure contact is installed on the lower end face of the lifting shaft, and a 50A DC current is passed between the top lead plate and the current input terminal. By rotating the lifting handwheel, the top pressure contact is moved downward from the initial position by a certain distance. After each certain distance of compression, the voltage is measured with a digital multimeter, and the contact resistance is calculated. After measuring one spring plate of the watch band contact fingers, the rotating handwheel is rotated to rotate the watch band contact finger shaft by one spring plate, and a second measurement is performed. The detection process of the clamping force and compression amount of the watch strap finger in the oil tank under oil-filled condition: A pressure sensor is installed on the lower end face of the lifting shaft. By rotating the lifting handwheel, the pressure sensor is moved downward from the initial position by a certain distance. After each certain distance is pressed down, the value of the pressure sensor on one side is measured. After measuring one spring plate of the watch strap finger, the rotating handwheel is rotated to rotate the watch strap finger shaft by one spring plate. A second measurement is performed to measure the relationship between the clamping force and compression amount of each spring plate of the watch strap finger. The process of detecting the compression and contact resistance of the watch band contact fingers under the condition that the oil tank is filled is as follows: The top pressure contact is installed on the lower end face of the lifting shaft, and a 50A DC current is passed between the top lead plate and the current input terminal. By rotating the lifting handwheel, the top pressure contact is moved downward from the initial position by a certain distance. After each certain distance of compression, the voltage is measured with a digital multimeter and the contact resistance is calculated. After measuring one spring plate of the watch band contact fingers, the rotating handwheel is rotated to rotate the watch band contact finger shaft by one spring plate, and a second measurement is performed. The process of measuring the compression and temperature of the watch band contact fingers under the condition that the oil tank is filled is as follows: The top pressure contact is installed on the lower end face of the lifting shaft. By rotating the lifting handwheel, the top pressure contact is moved downward a certain distance from the initial position. Every time it is pressed down a certain distance, a 50A DC current is briefly passed between the top lead plate and the current introduction terminal. The temperature of the contact point on the contact finger surface is measured using the thermocouple. After measuring one spring plate of the watch band contact finger, the rotating handwheel is rotated to rotate the watch band contact finger shaft by one spring plate, and a second measurement is performed. The process of measuring the heating temperature and gas generation rate of the watchband contact fingers under the condition of the oil tank being filled is as follows: different compression amounts are applied to each spring plate of the watchband contact fingers, a DC current of 50A or higher amplitude is passed through within a preset time period, the temperature of the contact point on the surface of the contact fingers is measured using the thermocouple, the gas content in the oil before and after the preset time of reaching the target temperature is recorded, the gas generation rate is calculated, and the gas generation rate of the converter transformer is converted according to the total oil volume of the sealed cavity and the converter transformer.

2. The method of using the watch strap spring touch finger performance testing device according to claim 1, characterized in that, The watch strap spring touch performance testing device further includes: a vacuum pump and an oil tank located at the bottom of the oil tank, wherein the vacuum pump is connected to the oil tank through a first pipeline, and the oil tank is connected to the oil tank through a second pipeline.

3. The method of using the watch strap spring touch finger performance testing device according to claim 2, characterized in that, The watch strap spring finger performance testing device further includes: a first switch tee disposed on the first pipeline, and a first syringe disposed on the first switch tee. A second switch tee is installed on the second pipeline, and a second syringe is installed on the second switch tee.

4. The method of using the watch strap spring touch finger performance testing device according to claim 3, characterized in that, The watch strap spring touch performance testing device further includes: a syringe driving device for mounting the first syringe and the second syringe, wherein the syringe driving device includes a frame made of steel plates, wherein the upper end of the frame is open, the first syringe or the second syringe is placed in the frame, and an end plate and a bottom support plate are fixedly connected in the frame, the injection head of the first syringe / second syringe passes through a round hole in the end plate, and the bottom support plate is supported on the rear end of the first syringe / second syringe.

5. The method of using the watch strap spring touch finger performance testing device according to claim 4, characterized in that, The frame also contains an electric push rod and a drive plate, wherein the drive plate is slidably connected inside the frame along the length direction of the first syringe / second syringe, the drive plate presses against the push plate of the first syringe / second syringe, the electric push rod is connected to the drive plate, and the movement of the drive plate is achieved by the retraction of the electric push rod, and a guide post is fixed inside the frame, the guide post passing through the drive plate for guidance.

6. The method of using the watch strap spring touch finger performance testing device according to claim 5, characterized in that, The output end of the rotary reducer extends into the oil tank and is fixedly connected to a first finger shaft mounting plate. A second finger shaft mounting plate is installed on the other side of the oil tank, and a rotary bearing is installed between the second finger shaft mounting plate and the oil tank. The first finger shaft mounting plate and the second finger shaft mounting plate are arranged symmetrically on the left and right, and the watch strap finger shaft is installed between the first finger shaft mounting plate and the second finger shaft mounting plate.

7. The method of using the watch strap spring touch finger performance testing device according to claim 1, characterized in that, The watch strap finger shaft is a horizontal cylindrical shape with a cylindrical boss at each end. Two slots corresponding to the ends of the watch strap fingers are opened on the opposite surfaces of the two bosses. The two ends of the watch strap fingers are respectively inserted into the two slots and the watch strap fingers move within the circular slots. A mounting groove is also opened on the boss, which extends into the slots. The watch strap fingers enter the slots through the mounting groove.

8. The method of using the watch strap spring touch finger performance testing device according to claim 1, characterized in that, The watch strap finger shaft is also provided with a square positioning block at each end. The finger shaft mounting plate is provided with a groove in the same direction as the positioning block. The watch strap finger shaft is fixed by inserting the two positioning blocks into the grooves of the two finger shaft mounting plates. The positioning blocks are provided with cable mounting holes. The current inlet terminal is connected to the cable mounting hole through a cable to introduce current into the watch strap finger shaft.

9. The method of using the watch strap spring touch finger performance testing device according to claim 1, characterized in that, The watchband spring touch performance testing device further includes: a displacement sensor disposed on the top mounting plate, the lower end of the displacement sensor contacting the upper end of the top lead plate, for detecting the lifting stroke of the top lead plate.

10. The method of using the watch strap spring touch finger performance testing device according to claim 1, characterized in that, The pressure contact plate is detachably connected to the lifting shaft by bolts. The pressure contact plate is then disassembled and installed as a pressure sensor. The pressure sensor is used to detect the relationship between the amount of pressure applied by a single watch strap finger and the downward force.

11. The method of using the watch strap spring touch finger performance testing device according to claim 10, characterized in that, The watch strap spring touch performance testing device also includes two electrical plugs located at the bottom of the oil tank, used to transmit the signals from the thermocouple and the pressure sensor to the display device.

12. The method of using the watch strap spring touch finger performance testing device according to claim 1, characterized in that, The power transmission mechanism is a worm gear reducer.

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