A device and method for testing interface pressure of distribution cable accessories

Abstract

The present invention relates to the technical field of cable accessory detection, and discloses a distribution cable accessory interface pressure testing device, including a data acquisition controller and an accessory support frame containing data corresponding to the radial thickness and interface pressure of the cable accessories, and corresponding distance measuring sensors are respectively provided on both sides of the accessory support frame, and an accessory distance measuring cavity is formed between the accessory support frame and the distance measuring sensor, and the distance measuring light emitted by the distance measuring sensor passes through the accessory distance measuring cavity for docking, and the two distance measuring sensors are respectively connected to the data acquisition controller. Also disclosed is a distribution cable accessory interface pressure testing method, which measures the actual radial thickness of the cable accessory to be tested, and obtains the actual interface pressure according to the corresponding relationship between the radial thickness of the cable accessory and the interface pressure. The distribution cable accessory interface pressure testing device and method of the present invention can be applied to actual operating cables, has a wide range of applications, and accurate test data.

Description

Technical Field

[0001] The present invention relates to the technical field of cable accessory detection, and in particular to a device and method for testing the interface pressure of distribution cable accessories. Background Art

[0002] As the demand for electricity increases with the development of urban modernization, the scale of distribution networks is also increasing. Generally speaking, the transmission lines of distribution networks are composed of several sections of cables connected by cable accessories. As an important part of the transmission system, the electrical strength of cable accessories is determined to a certain extent by the interface pressure between cable accessories and the cable body. However, cable accessories are also the weaker part of the transmission system, especially at the joint position, which is easily affected by electrothermal aging, resulting in reduced interface pressure and surface discharge. Therefore, accurately measuring the interface pressure between cable accessories and cable body is of great significance to the safe and reliable operation of distribution cables.

[0003] At present, domestic scholars have conducted a lot of research on the interface pressure test method of cable accessories. The patent application with application number 201820967811.2 discloses "a real-time measurement device for the interface pressure of high-voltage cable accessories". The interface pressure of the accessories is obtained by inserting a piezoresistive film sensor into the cable accessories. This method has accurate measurement results, but the sensor needs to be implanted in the cable accessories in advance, and cannot be applied to the actual operating cables. The patent application with application number 201811537041.9 discloses "a detection device and detection method for the interface pressure between rubber preforms and cable insulation". The rubber preform is placed on a test guide rod with an orifice. When the nitrogen pressure injected through the test guide rod is greater than the clamping force of the accessory at the air inlet, the interface pressure can be obtained. This method has a large operating space and is applicable to a wide range of accessory grades, but the model does not match the actual cable joint form, and the test data is difficult to verify. Summary of the invention

[0004] The purpose of the present invention is to provide a distribution cable accessory interface pressure testing device and method which can be applied to actual operating cables, has a wide range of applications and provides accurate test data.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a distribution cable accessory interface pressure testing device and method, including a data acquisition controller containing data corresponding to the radial thickness and interface pressure of the cable accessories and an accessory support frame, wherein corresponding distance measuring sensors are respectively provided on both sides of the accessory support frame, an accessory distance measuring cavity is formed between the accessory support frame and the distance measuring sensor, the distance measuring light emitted by the distance measuring sensor passes through the accessory distance measuring cavity to connect, and the two distance measuring sensors are respectively connected to the data acquisition controller.

[0006] As a preferred solution, it comprises a first bottom guide rail and a second bottom guide rail, the first bottom guide rail and the second bottom guide rail are respectively slidably mounted with the distance measuring sensors, and the accessory support frame is located between the two distance measuring sensors.

[0007] As a preferred solution, a height-adjustable sensor support frame is provided between the first bottom guide rail and the second bottom guide rail and the corresponding distance measuring sensors.

[0008] As a preferred embodiment, the sensor support frame includes a height adjustment rod and a sensor placement slot, the height adjustment rod includes a first height adjustment rod and a second height adjustment rod, the first height adjustment rod is coaxially installed with the second height adjustment rod, the first height adjustment rod is slidably inserted and installed on the second height adjustment rod, one end of the first height adjustment rod is connected to the bottom first guide rail or the bottom second guide rail, or, one end of the first height adjustment rod is connected to the bottom second guide rail, the other end of the first height adjustment rod is connected to one end of the second height adjustment rod, and the other end of the second adjustment rod is connected to the sensor placement slot.

[0009] As a preferred solution, it includes supporting the first guide rail and supporting the second guide rail, the two ends of the supporting first guide rail are respectively slidably installed on one end of the bottom first guide rail and the bottom second guide rail, the two ends of the supporting second guide rail are respectively slidably installed on the other end of the bottom first guide rail and the bottom second guide rail, and the accessory support frame is respectively installed on the supporting first guide rail and the supporting second guide rail.

[0010] As a preferred solution, the accessory support frame includes a first accessory support frame and a second accessory support frame, the first accessory support frame is slidably mounted on the first support rail, and the second accessory support frame is slidably mounted on the second support rail.

[0011] As a preferred embodiment, the first accessory support frame and the second accessory support frame both include an accessory adjustment rod and an upwardly open accessory placement slot, the accessory adjustment rod includes an adjustment rod one and an adjustment rod two, the adjustment rod one is coaxially installed with the adjustment rod two, the adjustment rod one is slidably inserted and installed on the adjustment rod two, one end of the adjustment rod one is connected to the support first guide rail or the support second guide rail, the other end of the adjustment rod one is connected to one end of the adjustment rod two, and the other end of the adjustment rod two is connected to the accessory placement slot.

[0012] As a preferred solution, a pressure sensor for measuring the pressure at the cable accessory interface is included, and the pressure sensor is connected to the data acquisition controller.

[0013] In order to achieve the above object, the present invention provides a method for testing the interface pressure of distribution cable accessories, comprising the following steps:

[0014] Step 1: Obtain the corresponding relationship between the radial thickness and the interface pressure of the cable accessories at the test point of the cable accessories at different temperatures;

[0015] Step 2: Mark a test point on a cable accessory to be tested that has the same diameter as the cable accessory, and the radial height of the test point to be tested is the same as the radial height of the test point, and obtain the actual radial thickness of the cable accessory to be tested;

[0016] Step 3: According to the corresponding relationship between radial thickness and interface pressure, the actual interface pressure of the cable accessory to be tested is obtained through the actual radial thickness.

[0017] As a preferred solution, the step 2 comprises:

[0018] (2-1): The distance between the two ranging sensors x1;

[0019] (2-2): Mark the test point to be tested in the cable accessory to be tested, place the cable accessory to be tested on the accessory support frame, keep the measuring light emitted by the two distance measuring sensors in the same straight line with the test point to be tested, and obtain the distance between the distance measuring sensors and the outer wall of the cable accessory to be tested through the two distance measuring sensors to obtain the distances x2 and x3;

[0020] (2-3): Calculate x1-x2-x3 to obtain the actual radial thickness of the cable accessory to be tested.

[0021] Compared with the prior art, the interface pressure testing device of the distribution cable accessories of the embodiment of the present invention has the following beneficial effects: before the cable accessories are placed in the accessory support frame, the positions of the two distance measuring sensors are correspondingly set, and the distance measuring light emitted by the distance measuring sensor can pass through the accessory distance measuring cavity for docking, and the distance x1 between the two distance measuring sensors is measured by the distance measuring sensor, the cable accessories to be tested are placed on the accessory support frame, and the two distance measuring sensors are started to measure the distance from the distance measuring sensor to the outer side of the cable accessories respectively, and the distances x2 and x3 are obtained. The measuring light emitted by the two distance measuring sensors is kept on the same straight line, and the radial thickness of the cable accessories is obtained by x1-x2-x3 through the data acquisition controller. Since there is a corresponding relationship between the interface pressure of the cable accessories and the radial thickness of the cable accessories, the actual interface pressure value is obtained according to the corresponding relationship between the actual radial thickness of the cable accessories and the interface pressure. The interface pressure testing device of the present invention can be applied to actual operating cables, has a wide range of applications, accurate test data, simple and fast operation, and high test efficiency.

[0022] The embodiment of the present invention provides a method for testing the interface pressure of a distribution cable accessory, which has the beneficial effect of measuring the actual radial thickness of the cable accessory to be tested, and obtaining the actual interface pressure according to the corresponding relationship between the radial thickness of the cable accessory and the interface pressure. The actual radial thickness of the cable accessory is the external dimension, and the actual interface pressure can be obtained by non-destructively measuring the cable accessory. The measuring method of the present invention has a wide range of applications, is simple to operate, is highly practical, effectively shortens the test time, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the interface pressure testing device of an embodiment of the present invention after the cable accessories are placed.

[0024] Figure 2 It is a schematic diagram of the overall structure of the interface pressure testing device according to an embodiment of the present invention.

[0025] Figure 3 It is a side view of the interface pressure testing device according to an embodiment of the present invention.

[0026] Figure 4 It is a front view of the interface pressure testing device according to an embodiment of the present invention.

[0027] In the figure:

[0028] 10. Cable accessories; 11. Data acquisition controller; 12. Accessory ranging chamber; 13. Pressure sensor;

[0029] 20. Accessory placement slot; 21. Supporting the first guide rail; 22. Supporting the second guide rail;

[0030] 30. First support frame for accessories; 31. Second support frame for accessories; 32. Adjustment rod one; 33. Adjustment rod two;

[0031] 40. Distance measuring sensor; 41. Sensor support frame; 42. First bottom guide rail; 43. Second bottom guide rail;

[0032] 50. First height adjustment lever; 51. Second height adjustment lever. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figures 1 to 4 As shown, an interface pressure testing device for distribution cable accessories according to a preferred embodiment of an embodiment of the present invention comprises a data acquisition controller 11 containing data corresponding to the radial thickness and interface pressure of the cable accessory 10 and an accessory support frame, and distance measuring sensors 40 corresponding to the positions are respectively arranged on both sides of the accessory support frame, and an accessory distance measuring cavity 12 is formed between the accessory support frame and the distance measuring sensor 40, and the distance measuring light emitted by the distance measuring sensor 40 passes through the accessory distance measuring cavity 12 for docking, and the two distance measuring sensors 40 are respectively connected to the data acquisition controller.

[0037] In the interface pressure testing device for distribution cable accessories 10 of the present invention, before the cable accessories 10 are placed in the accessory support frame, since the positions of the two distance measuring sensors 40 are correspondingly set, and the distance measuring light emitted by the distance measuring sensor 40 can pass through the accessory distance measuring cavity 12 for docking, the distance x1 between the two distance measuring sensors 40 is measured by the distance measuring sensor 40, the cable accessory 10 to be tested is placed on the accessory support frame, and the two distance measuring sensors 40 are started to measure the distance from the distance measuring sensor 40 to the outer side of the cable accessory 10 respectively, and the distances x2 and x3 are obtained. The measuring light emitted by the two distance measuring sensors 40 is kept on the same straight line, and the radial thickness of the cable accessory 10 is obtained by x1-x2-x3 through the data acquisition controller 11. Since there is a corresponding relationship between the interface pressure of the cable accessory 10 and the radial thickness of the cable accessory 10, the actual interface pressure value is obtained according to the corresponding relationship between the actual radial thickness of the cable accessory 10 and the interface pressure. The interface pressure testing device of the present invention can be applied to actual operating cables, has a wide range of applications, accurate test data, simple and fast operation, and high test efficiency. The distance measuring sensor 40 is an infrared sensor or a laser sensor. The laser sensor is the preferred distance measuring sensor 40. The laser sensor can realize non-contact long-distance measurement with high speed, high accuracy, large measuring range, and strong light and electrical interference resistance.

[0038] Further, such as Figures 1 to 3 As shown, it includes a bottom first rail 42 and a bottom second rail 43, and the bottom first rail 42 and the bottom second rail 43 are respectively slidably mounted with a distance sensor 40, and the accessory support frame is located between the two distance sensors 40. The distance sensor 40 can move in the bottom rail to adjust the axial position of the measuring cable accessory 10, and then measure the interface pressure at different axial positions of the cable accessory 10. Specifically, the bottom first rail 42 is arranged in parallel with the bottom first rail 42, so that when the distance sensor 40 slides, the distance between the two distance sensors 40 remains consistent.

[0039] Further, such as Figures 1 to 3 As shown, a height-adjustable sensor support frame 41 is provided between the bottom first rail 42 and the bottom second rail 43 and the corresponding distance measuring sensor 40. Specifically, one end of one sensor support frame 41 is connected to the bottom first rail 42, and the other end is connected to the distance measuring sensor 40 located at the position corresponding to the bottom first rail 42, and one end of another sensor support frame 41 is connected to the bottom second rail 43, and the other end is connected to the distance measuring sensor 40 located at the position corresponding to the bottom second rail 43. The height of the sensor support frame 41 is adjustable, thereby realizing the measurement height adjustment of the distance measuring sensor 40, which is suitable for measuring cable accessories 10 of different diameters or heights, and has a wider range of applications.

[0040] Further, such as Figures 1 to 3As shown, the sensor support frame 41 includes a height adjustment rod and a sensor placement groove, the height adjustment rod includes a first height adjustment rod 50 and a second height adjustment rod 51, the first height adjustment rod 50 is coaxially installed with the second height adjustment rod, the first height adjustment rod 50 is slidably inserted and installed in the second height adjustment rod 51, one end of the first height adjustment rod 50 is connected to the bottom first guide rail 42 or the bottom second guide rail 43, or one end of the first height adjustment rod 50 is connected to the bottom second guide rail 43, the other end of the first height adjustment rod 50 is connected to one end of the second height adjustment rod 51, and the other end of the second adjustment rod is connected to the sensor placement groove. The sensor placement groove is used to place the ranging sensor 40. Specifically, the radial cross-sectional shape of the sensor placement groove is adapted to the outer shape of the ranging sensor 40, so that the placement of the ranging sensor 40 is more stable. The first height adjustment rod 50 slides relative to the second height adjustment rod 51 to achieve the height adjustment of the sensor placement groove and then adjust the ranging height of the ranging sensor 40, so that the ranging sensor 40 is kept at the same height as the marked test point to be tested. Specifically, an adjustment hole is opened in the second height adjustment rod 51, one end of the bolt is inserted through the adjustment hole and presses against the first height adjustment rod 50, and the tightness of the outer wall of the first height adjustment rod 50 is pressed by the knob bolt, thereby achieving height fixation between the first height adjustment rod 50 and the second height adjustment rod 51.

[0041] Further, such as Figure 2 and Figure 4 As shown, it includes a first guide rail 21 and a second guide rail 22, the two ends of the first guide rail 21 are slidably mounted on one end of the bottom first guide rail 42 and the bottom second guide rail 43, the two ends of the second guide rail 22 are slidably mounted on the other end of the bottom first guide rail 42 and the bottom second guide rail 43, and the accessory support frame is respectively mounted on the first guide rail 21 and the second guide rail 22. The first guide rail 21 and the second guide rail 22 are arranged in parallel, and the first guide rail 21 and the second guide rail 22 are respectively perpendicular to the bottom first guide rail 42. The first guide rail 21 and the second guide rail 22 can slide relative to each other, thereby adjusting the distance between the first guide rail 21 and the second guide rail 22, thereby achieving support for cable accessories 10 of different lengths, and having wide applicability.

[0042] Further, such as Figure 2 and Figure 4 As shown, the accessory support frame includes an accessory first support frame 30 and an accessory second support frame 31, wherein the accessory first support frame 30 is slidably mounted on the supporting first guide rail 21, and the accessory second support frame 31 is slidably mounted on the supporting second guide rail 22. The two ends of the cable accessory 10 to be tested are respectively placed on the accessory first support frame 30 and the accessory second support frame 31, and the middle part of the cable accessory 10 to be tested is located in the accessory ranging cavity 12, so that the ranging light emitted by the ranging sensor 40 measures the cable accessory 10.

[0043] Further, such as Figure 3 The first accessory support frame 30 and the second accessory support frame 31 shown both include an accessory adjustment rod and an accessory placement slot 20 with an opening facing upwards. The accessory adjustment rod includes an adjustment rod 1 32 and an adjustment rod 2 33. The adjustment rod 1 32 is coaxially installed with the adjustment rod 2 33. The adjustment rod 1 32 is slidably inserted and installed in the adjustment rod 2 33. One end of the adjustment rod 1 32 is connected to the first guide rail 21 or the second guide rail 22, and the other end of the adjustment rod 1 32 is connected to one end of the adjustment rod 2 33. The other end of the adjustment rod 33 is connected to the accessory placement slot 20. By adjusting the relative sliding of the first adjustment rod 32 and the second adjustment rod 33, the height of the first accessory support frame 30 or the second accessory support frame 31 is adjusted so that the cable accessory 10 is kept parallel to the bottom first guide rail 42. At the same time, when measuring, the test point marked on the cable accessory 10 and the distance measuring light emitted by the distance measuring sensor 40 are kept in the same straight line. Placing the cable accessory 10 in the accessory placement slot 20 with an opening facing upwards prevents the cable accessory 10 from falling during the measurement process, and the placement is convenient, thereby improving the measurement efficiency. Specifically, an adjustment hole is opened in the second adjustment rod 33, one end of the bolt is inserted through the adjustment hole and presses against the first adjustment rod 32, and the tightness of the outer wall of the first adjustment rod 32 is adjusted by the knob bolt, thereby achieving height fixation between the first adjustment rod 32 and the second adjustment rod 33.

[0044] In the interface pressure testing device of the present invention, the height of the sensor support frame 41 and the relative positions between the guide rails can be adjusted according to the measurement, so as to realize the measurement of different positions of the cable accessories 10 with different expansion rates.

[0045] Further, such as Figure 1As shown, it includes a pressure sensor 13 for measuring the interface pressure of the cable accessory 10, and the pressure sensor 13 is connected to the data acquisition controller 11. The interface pressure of the cable accessory 10 is measured by the pressure sensor 13, and the measured pressure value is transmitted to the data acquisition controller 11. At the same time, two distance sensors 40 respectively measure the distance from the distance sensor 40 to the outer side of the cable accessory 10 as x2 and x3, and the measured distance information is transmitted to the data acquisition controller 11. The data is sorted by the data acquisition controller 11 to obtain the data correspondence between the interface pressure of the cable accessory 10 and the radial thickness of the cable. The measuring positions of the two distance sensors 40 and the pressure sensor 13 are kept on the same straight line. As a preferred embodiment, the pressure sensor 13 uses a thin film pressure sensor 13, and the thin film pressure sensor 13 is placed between the cable accessory 10 and the cable body. The thin film pressure sensor 13 has high measurement accuracy, small size, light weight and corrosion resistance, is suitable for use in harsh environments, has fast dynamic response, and has strong overload capacity. Specifically, test points are pre-marked on the corresponding two sides of the cable accessory 10 to be tested, and the pressure sensors 13 include at least two. The two pressure sensors 13 are respectively built into the inner wall corresponding to the test points of the cable accessory 10 to be tested, and the pressure sensors 13 are respectively located on the same straight line with the ranging sensors 40 to ensure that the radial thickness at the test points of the cable accessory 10 to be tested corresponds to the pressure value obtained by the pressure sensor 13 test. The acquired data is statistically sorted by the data acquisition controller 11 to obtain the corresponding data curve of the radial thickness and interface pressure of the cable accessory 10, so that the internal interface pressure can be obtained by measuring only the radial thickness of the cable accessory 10, thereby realizing non-destructive measurement of the cable accessory 10.

[0046] A method for testing the interface pressure of a distribution cable accessory comprises the following steps:

[0047] Step 1: Obtain the corresponding relationship between the radial thickness and the interface pressure of the cable accessory 10 at the test point of the cable accessory 10 at different temperatures;

[0048] Step 2: Mark the test point on the cable accessory 10 to be tested, which has the same diameter as the cable accessory 10, so that the radial height of the test point to be tested is the same as the radial height of the test point, and obtain the actual radial thickness of the cable accessory 10 to be tested;

[0049] Step 3: According to the corresponding relationship between radial thickness and interface pressure, the actual interface pressure of the cable accessory 10 to be tested is obtained through the actual radial thickness.

[0050] In the interface pressure testing method of cable accessories of the present invention, the cable accessories 10 are mainly affected by temperature, resulting in thermal expansion and contraction, which in turn causes changes in the radial thickness of the cable accessories 10, thereby causing changes in the interface pressure of the cable accessories 10. The present invention first measures the interface pressure by installing a pressure sensor 13 in the cable accessories 10, thereby retaining the advantage of the accurate measurement method of the built-in sensor, and at the same time solving the problem that this method cannot be applied to the measurement of actual cables in operation. Specifically, in step 1, the corresponding data of the radial thickness and interface pressure of the distribution cable accessories 10 at different expansion rates and different operating temperatures are first entered into the data acquisition controller 11, and then the corresponding curve is drawn, so that in actual measurement, only the radial thickness of the circuit accessories needs to be measured to obtain the changes in the internal interface pressure of the circuit accessories.

[0051] Further, such as Figures 1 to 4 As shown, step 2 includes the following steps:

[0052] (2-1): Obtain the distance x1 between the two distance measuring sensors 40;

[0053] (2-2): Mark the test point to be tested in the cable accessory 10 to be tested, so that the cable accessory 10 to be tested is placed on the accessory support frame, and the measuring light emitted by the two distance measuring sensors 40 is kept in the same straight line with the test point to be tested, and the distance between the distance measuring sensor 40 and the outer wall of the cable accessory 10 to be tested is respectively obtained by the two distance measuring sensors 40 to obtain the distances x2 and x3;

[0054] (2-3): Calculate x1-x2-x3 to obtain the actual radial thickness of the cable accessory 10 to be tested.

[0055] The accessory support frame provides support for the cable accessory 10 to be tested, and the external distance of the cable accessory 10 to be tested is measured by the distance measuring sensor 40. The radial thickness of the cable accessory 10 to be tested is calculated through the distance between the distance measuring sensors 40 and the distance from the distance measuring sensor 40 to the outer wall of the cable accessory 10 to be tested, and then the actual interface pressure is obtained through the corresponding data of the radial thickness and the interface pressure. The present invention can non-destructively measure the interface pressure of the prefabricated distribution cable accessory 10, and has strong practicality. The internal interface pressure can be inferred only by measuring the radial thickness of the cable accessory 10. The measurement process is simple and convenient, and it can also provide a technical reference for non-destructive measurement of cable accessories 10 of different voltage levels.

[0056] In summary, an embodiment of the present invention provides an interface pressure testing device for a distribution cable accessory 10. The cable accessory 10 to be tested is placed on an accessory support frame, and the distances x1, x2 and x3 are respectively measured by the distance measuring sensors 40 on both sides of the cable accessory 10. The actual radial thickness of the cable accessory 10 to be tested is calculated by x1-x2-x3, and the actual interface pressure is obtained according to the corresponding data of the actual radial thickness and the interface pressure. The interface pressure testing device of the present invention does not need to place a test element in the cable accessory 10, and can perform non-destructive measurement of the cable accessory 10. It is particularly suitable for interface pressure measurement of prefabricated and in-service cable accessories 10, has a wide range of applications, is simple to operate, and is highly practical. It can effectively shorten the test time and improve the test efficiency.

[0057] A method for testing the interface pressure of a distribution cable accessory according to an embodiment of the present invention measures the actual radial thickness of the cable accessory 10 to be tested, and obtains the actual interface pressure according to the corresponding relationship between the radial thickness of the cable accessory 10 and the interface pressure. The actual interface pressure can be obtained by measuring the actual radial thickness of the external dimensions of the cable accessory 10, and the cable accessory 10 can be non-destructively measured. The measuring method of the present invention has a wide range of applications, is simple to operate, is highly practical, effectively shortens the test time, and improves the test efficiency.

[0058] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An interface pressure testing device for distribution cable accessories, characterized in that: It includes a first bottom rail, a second bottom rail, a data acquisition controller containing data corresponding to the radial thickness and interface pressure of the cable accessories, and an accessory support frame, wherein two sides of the accessory support frame are respectively provided with corresponding distance measuring sensors, an accessory distance measuring cavity is formed between the accessory support frame and the distance measuring sensor, the distance measuring light emitted by the distance measuring sensor passes through the accessory distance measuring cavity for docking, and the two distance measuring sensors are respectively connected to the data acquisition controller; The distance measuring sensors are slidably mounted on the first bottom guide rail and the second bottom guide rail respectively, the accessory support frame is located between the two distance measuring sensors, and the first bottom guide rail is arranged in parallel with the second bottom guide rail.

2. The interface pressure testing device for distribution cable accessories according to claim 1, characterized in that: A height-adjustable sensor support frame is arranged between the first bottom guide rail and the second bottom guide rail and the corresponding distance measuring sensors.

3. The interface pressure testing device for distribution cable accessories according to claim 2 is characterized in that: The sensor support frame includes a height adjustment rod and a sensor placement groove, the height adjustment rod includes a first height adjustment rod and a second height adjustment rod, the first height adjustment rod is coaxially installed with the second height adjustment rod, the first height adjustment rod is slidably inserted and installed on the second height adjustment rod, one end of the second height adjustment rod is connected to the bottom first guide rail or the bottom second guide rail, or, one end of the second height adjustment rod is connected to the bottom second guide rail, the other end of the second height adjustment rod is connected to one end of the first height adjustment rod, and the other end of the first adjustment rod is connected to the sensor placement groove.

4. The interface pressure testing device for distribution cable accessories according to claim 1, characterized in that: It includes a supporting first guide rail and a supporting second guide rail, wherein the two ends of the supporting first guide rail are respectively slidably mounted on one end of the bottom first guide rail and the bottom second guide rail, and the two ends of the supporting second guide rail are respectively slidably mounted on the other end of the bottom first guide rail and the bottom second guide rail, and the accessory support frame is respectively mounted on the supporting first guide rail and the supporting second guide rail.

5. The interface pressure testing device for distribution cable accessories according to claim 4 is characterized in that: The accessory support frame includes a first accessory support frame and a second accessory support frame. The first accessory support frame is slidably mounted on the first support rail, and the second accessory support frame is slidably mounted on the second support rail.

6. The interface pressure testing device for distribution cable accessories according to claim 5, characterized in that: The first accessory support frame and the second accessory support frame both include an accessory adjustment rod and an upwardly open accessory placement slot, the accessory adjustment rod includes an adjustment rod one and an adjustment rod two, the adjustment rod one is coaxially installed with the adjustment rod two, the adjustment rod one is slidably inserted and installed on the adjustment rod two, one end of the adjustment rod two is connected to the support first guide rail or the support second guide rail, the other end of the adjustment rod two is connected to one end of the adjustment rod one, and the other end of the adjustment rod one is connected to the accessory placement slot.

7. The interface pressure testing device for distribution cable accessories according to claim 1, characterized in that: It comprises a pressure sensor for measuring the pressure of the cable accessory interface, and the pressure sensor is connected to the data acquisition controller.

8. A method for testing the interface pressure of distribution cable accessories, characterized in that: The following steps are involved: Step 1: Obtain the corresponding relationship between the radial thickness and the interface pressure of the cable accessories at the test point of the cable accessories at different temperatures; Step 2: Mark a test point on a cable accessory to be tested that has the same diameter as the cable accessory, and the radial height of the test point to be tested is the same as the radial height of the test point, and obtain the actual radial thickness of the cable accessory to be tested; The step 2 comprises: (2-1): Get the distance x1 between the two ranging sensors; (2-2): Mark the test point to be tested in the cable accessory to be tested, place the cable accessory to be tested on the accessory support frame, keep the measuring light emitted by the two distance measuring sensors in the same straight line with the test point to be tested, and obtain the distance between the distance measuring sensors and the outer wall of the cable accessory to be tested through the two distance measuring sensors to obtain the distances x2 and x3; (2-3): Calculate x1-x2-x3 to obtain the actual radial thickness of the cable accessory to be tested; Step 3: According to the corresponding relationship between radial thickness and interface pressure, the actual interface pressure of the cable accessory to be tested is obtained through the actual radial thickness.

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