Cable accessory interface pressure simulation test device and method

Abstract

The invention discloses a cable accessory interface pressure simulation test device and method, and the device comprises a diameter adjusting mechanism which comprises a driving assembly and a plurality of bearing parts, the plurality of bearing parts are arranged around an axis in a circumferential direction, one side, away from the axis, of each bearing part is used for bearing a first to-be-tested part, and the first to-be-tested part is used for bearing a second to-be-tested part; the first to-be-tested pieces on all the bearing pieces are matched to form a cable insulation layer simulation component, and the driving assembly is used for driving all the bearing pieces to linearly move in the direction perpendicular to the axis, so that the outer diameter of the cable insulation layer simulation component is changed; the cable accessory simulation component comprises a cover body and a second to-be-tested piece arranged in the cover body, the second to-be-tested piece is provided with an assembly hole, and the plurality of bearing pieces are arranged in the assembly hole in a penetrating manner, so that the cable insulation layer simulation component is arranged in the assembly hole in a penetrating manner; and the pressure sensor is arranged between the first to-be-tested piece and the second to-be-tested piece and is used for detecting the interface pressure between the first to-be-tested piece and the second to-be-tested piece.

Description

Technical Field

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

[0002] Interface pressure is the core element of the insulation structure design of high-voltage cable accessories. The interface pressure between high-voltage cable accessories and cables (mainly the rubber layer of cable accessories and the insulation layer of cables) plays a decisive role in the insulation characteristics of cable accessories (breakdown strength, partial discharge, etc.), among which, the interface pressure is achieved through the interference fit between the rubber layer of cable accessories and the insulation layer of cables. If the interface pressure is too small, it cannot meet the electrical strength requirements of cable accessories, and it is easy to produce air gaps and cavities, causing the cable accessories to break along the interface; if the interface pressure is too large, it will make the cable accessories difficult to install. Installation under interference fit will cause the cable accessories to crack and break, and after a period of operation, it will cause stress relaxation.

[0003] The test of the interface pressure between the rubber layer of the cable accessories and the insulation layer of the cable can provide a basis for selecting the interference fit between the rubber layer of the cable accessories and the insulation layer of the cable. In the related art, if the interface pressure test is to be performed on cables with multiple different outer diameters, it is necessary to repeatedly disassemble and assemble cables with different outer diameters, which is inconvenient to operate. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cable accessory interface pressure simulation test device which is easy to operate.

[0005] The invention also provides a cable accessory interface pressure simulation test method.

[0006] According to the first aspect of the present invention, a cable accessory interface pressure simulation test device comprises: a diameter adjustment mechanism, the diameter adjustment mechanism comprises a driving assembly and a plurality of bearing members, the plurality of bearing members are arranged around an axis in a circumferential direction, the side of each bearing member away from the axis is used to carry a first piece to be tested, the first pieces to be tested on all the bearing members cooperate to form a cable insulation layer simulation component, the driving assembly is used to drive each of the bearing members to perform linear motion in a direction perpendicular to the axis so that the outer diameter of the cable insulation layer simulation component changes; a cable accessory simulation component, the cable accessory simulation component comprises a cover body, and a second piece to be tested arranged in the cover body, the second piece to be tested is provided with an assembly hole, the plurality of bearing members are passed through the assembly hole so that the cable insulation layer simulation component is passed through the assembly hole; a pressure sensor, the pressure sensor is arranged between the first piece to be tested and the second piece to be tested, and is used to detect the interface pressure between the first piece to be tested and the second piece to be tested.

[0007] The cable accessory interface pressure simulation test device according to the embodiment of the present invention has at least the following beneficial effects:

[0008] When the cable accessory interface pressure simulation test device of the present invention is used, first, multiple bearings are inserted into the assembly hole of the second test piece so that the outer wall of each first test piece is opposite to the inner wall of the second test piece, and then the driving component drives each first test piece to move toward the inner wall of the second test piece, so that pressure is generated between the first test piece and the second test piece, wherein the pressure value between the first test piece and the second test piece can be detected by the pressure sensor. In the cable accessory interface pressure simulation test device of the present invention, each bearing is driven by the driving component to perform linear motion in a direction perpendicular to the axis, so that each first test piece can perform linear motion in a direction perpendicular to the axis, thereby changing the outer diameter of the cable insulation layer simulation component, simulating the interface pressure between the cables of different diameters and the cable accessories after assembly, and realizing the purpose of freely changing the outer diameter of the cable insulation layer simulation component, that is, the interference between the first test piece and the second test piece, and in the process of changing the outer diameter of the cable insulation layer simulation component, no component needs to be disassembled, which is efficient and convenient to operate.

[0009] According to some embodiments of the present invention, the plurality of carriers are operable to rotate along the circumferential direction.

[0010] According to some embodiments of the present invention, the diameter adjustment mechanism further includes a support member, the drive assembly is disposed on the support member, each of the bearing members is connected to the drive assembly, and the support member is operable to rotate along the circumferential direction.

[0011] According to some embodiments of the present invention, each of the carriers is provided with a positioning groove on one side away from the axis, and the first test piece is used to be arranged in the positioning groove;

[0012] Wherein, along the circumferential direction, both ends of the bearing member are provided with a rounded corner structure on one side away from the axis.

[0013] According to some embodiments of the present invention, it further comprises an air pump and an air pipe connected to the air pump, wherein the air pipe is used to extend into the space formed by the plurality of the supporting members;

[0014] The cable accessory interface pressure simulation test device also includes a first sealing member for sealing one end of the assembly hole, and a second sealing member for sealing the other end of the assembly hole.

[0015] According to some embodiments of the present invention, an air pressure sensor is disposed in the assembly hole.

[0016] According to some embodiments of the present invention, the driving assembly includes a plurality of linear driving members, the plurality of linear driving members are arranged at intervals around the axis along the circumferential direction, and the plurality of linear driving members are drivingly connected to the plurality of supporting members in a one-to-one correspondence.

[0017] According to some embodiments of the present invention, the inner wall of the cover body includes a first conical wall, the outer wall of the second test piece includes a second conical wall, the second conical wall is coaxially arranged with the assembly hole, and the second conical wall is arranged in close contact with the second conical wall;

[0018] The cable accessory simulation component also includes an adjustment mechanism for adjusting the axial position of the second test piece.

[0019] According to some embodiments of the present invention, a temperature sensor is further included, and the temperature sensor is used to detect the temperature of the first DUT and the second DUT.

[0020] According to some embodiments of the present invention,

[0021] The cable accessory interface pressure simulation test method according to the second aspect of the present invention is applied to the above-mentioned cable accessory interface pressure simulation test device, and the cable accessory interface pressure simulation test method includes:

[0022] Inserting a plurality of the carriers into the assembly holes of the second test piece so that the outer side walls of the first test pieces are opposite to the inner side walls of the second test piece;

[0023] The driving assembly drives each of the first pieces to be tested to move toward the inner wall of the second piece to be tested, so that pressure is generated between the first pieces to be tested and the second pieces to be tested;

[0024] Using the first sealing member and the second sealing member to seal the two ends of the assembly hole respectively;

[0025] The air pump is used to inflate the space in the assembly hole. During the inflation process, the plurality of bearing members are rotated so as to rotate around the axis.

[0026] The cable accessory interface pressure simulation test method according to the embodiment of the present invention has at least the following beneficial effects:

[0027] When the cable accessory interface pressure simulation test device of the present invention is used, first, a plurality of bearing members are inserted into the assembly hole of the second test piece so that the outer wall of each first test piece is opposite to the inner wall of the second test piece, and then, the driving component drives each first test piece to move toward the inner wall of the second test piece, so that pressure is generated between the first test piece and the second test piece, and then, the first sealing member and the second sealing member are used to seal the two ends of the assembly hole respectively, and then, the space in the assembly hole is inflated by an air pump. During the inflation process, a plurality of bearing members can be rotated, and the rotation of the bearing members can smooth the second test piece that has been extended into the gap, and due to the air pressure in the assembly hole, the second test piece will be more difficult to be squeezed into the gap after the position is changed (at least the part extending into the gap at the back is less than the part extending into the gap at the front). In this way, the interference between the first test piece and the second test piece during the test can be more in line with the actual situation, thereby improving the accuracy of the test results.

[0028] In addition, when the cable accessory interface pressure simulation test device of the present invention is used, the first piece to be tested and the second piece to be tested are first abutted against each other and pressure is generated, and then the sealed assembly hole is inflated. This can avoid the pressurized air pressure acting on the pressure sensor in advance, resulting in the actual detection value of the pressure sensor not being the interface pressure between the first piece to be tested and the second piece to be tested. This is because, when the first piece to be tested and the second piece to be tested are abutted against each other and pressure is generated, the pressure sensor will be surrounded and sealed by the first piece to be tested and the second piece to be tested, and the pressurized air pressure will never act on the pressure sensor from beginning to end. However, if the air pump is used to pressurize the space in the assembly hole before the first piece to be tested and the second piece to be tested are butted against each other and pressure is generated, then the pressurized air pressure will directly act on the pressure sensor, causing the pressure sensor to obtain erroneous pressure information. Even if the final driving component drives the first piece to be tested and the second piece to be tested to be squeezed together, the pressure sensor also detects the interface pressure between the first piece to be tested and the second piece to be tested. However, the air pressure detected by the pressure sensor during that period of time may cause the tester to misjudge and have a bad influence on the test.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0031] Figure 1 It is a schematic cross-sectional view of a cable accessory interface pressure simulation test device according to an embodiment of the present invention;

[0032] Figure 2It is a side structural schematic diagram of a cable accessory interface pressure simulation test device according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic cross-sectional structure diagram of a cable accessory interface pressure simulation test device according to another embodiment of the present invention.

[0034] Figure Number:

[0035] 10. Axis;

[0036] 100, diameter adjustment mechanism; 110, driving assembly; 111, linear driving member; 112, oil pump; 113, oil pipe; 120, bearing member; 121, positioning groove; 122, gap; 130, first test piece; 140, supporting member; 141, hand wheel;

[0037] 200, cable accessory simulation component; 210, cover; 211, first conical wall; 220, second test piece; 221, assembly hole; 222, second conical wall; 230, adjustment mechanism; 231, backing plate; 232, adjustment screw; 233, adjustment nut; 234, spring; 235, guide shaft; 236, conical support;

[0038] 300. Pressure sensor;

[0039] 400. Temperature sensor;

[0040] 500, air pump; 510, air pipe;

[0041] 600, first sealing member;

[0042] 700. Second sealing member. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships 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. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] like Figure 1 , Figure 2 As shown, a cable accessory interface pressure simulation test device provided by an embodiment of the present invention includes a diameter adjustment mechanism 100, a cable accessory simulation component 200 and a pressure sensor 300.

[0047] Combination Figure 1 and Figure 2 The diameter adjustment mechanism 100 includes a driving assembly 110 and a plurality of bearing members 120 .

[0048] A plurality of carriers 120 are arranged around the axis 10 along a circumferential direction. The side of each carrier 120 away from the axis 10 is used to carry the first test piece 130. The first test pieces 130 on all the carriers 120 cooperate to form a cable insulation layer simulation component.

[0049] Specifically, the bearing member 120 is an arc-shaped structure, and each bearing member 120 is coaxially arranged, and multiple bearing members 120 are arranged at intervals along a circumferential direction and cooperate to form a ring-shaped structure. It should be noted that each adjacent two bearing members 120 are not directly connected. The side of the bearing member 120 away from its axis is the outer side of the bearing member 120, and the outer side of each bearing member 120 is used to carry a first piece to be tested 130, wherein the material of the first piece to be tested 130 is the same as the material of the cable insulation layer, which is cross-linked polyethylene. The first piece to be tested 130 is also an arc-shaped structure, and each first piece to be tested 130 is also coaxially arranged, and the first pieces to be tested 130 on all the first bearing members 120 cooperate to form a ring-shaped structure, so that all the first pieces to be tested 130 will cooperate to form a cable insulation layer simulation component. It should be noted that each adjacent two first pieces to be tested 130 are not directly connected.

[0050] The driving assembly 110 is used to drive each bearing member 120 to perform linear motion in a direction perpendicular to the axis 10 so as to change the outer diameter of the cable insulation layer simulation component.

[0051] It is understandable that the driving assembly 110 can drive each bearing member 120 to perform linear motion in a direction perpendicular to the axis 10, so that each first test piece 130 performs linear motion in a direction perpendicular to the axis 10. It is understandable that when each first test piece 130 is closer to the axis 10, the outer diameter of the cable insulation layer simulation component formed by each first test piece 130 is smaller, and when each first test piece 130 is farther from the axis 10, the outer diameter of the cable insulation layer simulation component formed by each first test piece 130 is larger.

[0052] like Figure 1 As shown, the cable accessory simulation component 200 includes a cover body 210 and a second test piece 220 arranged in the cover body 210, wherein the material of the second test piece 220 is rubber, such as EPDM rubber or silicone rubber; the second test piece 220 is provided with an assembly hole 221, and a plurality of carriers 120 are passed through the assembly hole 221 so that the cable insulation layer simulation component is passed through the assembly hole 221.

[0053] It is understandable that when performing an interface pressure simulation test, multiple carriers 120 need to be inserted into the assembly holes 221 of the second test piece 220 so that the outer walls of each first test piece 130 are opposite to the inner walls of the second test piece 220. When the driving component 110 drives each first test piece 130 to move toward the inner wall of the second test piece 220, pressure can be generated between the first test piece 130 and the second test piece 220.

[0054] The pressure sensor 300 is used to be disposed between the first DUT 130 and the second DUT 220 , and is used to detect the interface pressure between the first DUT 130 and the second DUT 220 .

[0055] It should be noted that the pressure sensor 300 is electrically connected to an external display, and the pressure value measured by the pressure sensor 300 can be displayed on the display for the tester to view.

[0056] Specifically, a mounting groove is provided on the outer side of the first DUT 130, and the pressure sensor 300 is disposed in the mounting groove. The pressure sensor 300 may be a thin film pressure sensor.

[0057] When the cable accessory interface pressure simulation test device of the present invention is in use, first, a plurality of carriers 120 are inserted into the assembly holes 221 of the second test piece 220 so that the outer wall of each first test piece 130 is opposite to the inner wall of the second test piece 220, and then, the driving component 110 drives each first test piece 130 to move toward the inner wall of the second test piece 220, so that pressure is generated between the first test piece 130 and the second test piece 220, wherein the pressure value between the first test piece 130 and the second test piece 220 can be detected by the pressure sensor 300. In the cable accessory interface pressure simulation test device of the present invention, each bearing member 120 is driven by the driving component 110 to perform linear motion in a direction perpendicular to the axis 10, so that each first test piece 130 can perform linear motion in a direction perpendicular to the axis 10, thereby changing the outer diameter of the cable insulation layer simulation component, simulating the interface pressure between cables of different diameters and cable accessories after the two are assembled, and achieving the purpose of freely changing the outer diameter of the cable insulation layer simulation component, that is, the interference between the first test piece 130 and the second test piece 220. In addition, in the process of changing the outer diameter of the cable insulation layer simulation component, there is no need to disassemble or assemble any component, which is efficient and easy to operate.

[0058] The cable accessory interface pressure simulation test device of the present invention may also be provided with a temperature sensor 400 for detecting the temperature of the first test piece 130 and the second test piece 220 .

[0059] It can be understood that when the interface pressure test is performed using the cable accessory interface pressure simulation test device of the present invention, a temperature control device can be used to change the temperature of the test environment. For example, the temperature of the test environment can be adjusted within the range of -45°C to 45°C, thereby obtaining data on the change in interface pressure over time for the first test piece 130 and the second test piece 220 at different temperatures.

[0060] like Figure 2As shown, in some embodiments, the driving assembly 110 includes a plurality of linear driving members 111, and the plurality of linear driving members 111 are arranged at intervals around the axis 10 in the circumferential direction, and the plurality of linear driving members 111 are drivingly connected to the plurality of bearing members 120 in a one-to-one correspondence. Each linear driving member 111 is used to drive a bearing member 120 to perform linear motion in a direction perpendicular to the axis 10, so that under the action of the plurality of linear driving members 111, each first test member 130 can be made to perform linear motion in a direction perpendicular to the axis 10, so that the outer diameter of the cable insulation layer simulation member changes. Among them, the linear driving member 111 can be a cylinder, an oil cylinder or an electric push rod.

[0061] like Figure 1 As shown, specifically in this embodiment, the linear driving member 111 is an oil cylinder, and the oil cylinder is connected to the oil pump 112 through an oil pipe 113 .

[0062] like Figure 2 As shown, in some embodiments, a plurality of carriers 120 are operable to rotate about an axis 10 .

[0063] It should be noted that when the cable accessory interface pressure simulation test device of the present invention is in use, after each bearing member 120 moves back to the axis 10 under the action of the driving assembly 110, a gap 122 will appear between two adjacent bearing members 120. Since the first test piece 130 and the second test piece 220 will squeeze each other during the test, the second test piece 220 will be squeezed into the gap 122. If the position of the bearing member 120 in the circumferential direction does not change, then no matter which experiment is performed, the part of the second test piece 220 squeezed into the gap 122 will never change, and fatigue damage is likely to occur. By rotating multiple bearing members 120 around the axis 10, on the one hand, the part of the second test piece 220 squeezed into the gap 122 can be changed, avoiding fatigue damage caused by the part of the second test piece 220 squeezed into the gap 122 being unchanged, thereby increasing the service life of the second test piece 220. On the other hand, the pressure sensor 300 can be driven to rotate, thereby measuring the interface pressure at different locations.

[0064] It should be noted that, in some cases, the operation of rotating multiple carriers 120 can be performed after the driving assembly 110 drives each carrier 120 to move toward the axis 10, thereby separating the second test piece 220 from the first test piece 130; in other cases, the operation of rotating multiple carriers 120 can also be performed during the process of the second test piece 220 and the first test piece 130 being in contact with each other.

[0065] Combination Figure 1 and Figure 2In some embodiments, the diameter adjustment mechanism 100 further includes a support member 140, the driving assembly 110 is disposed on the support member 140, and the support member 140 is operable to rotate in a circumferential direction. Thus, rotating the support member 140 can achieve the purpose of rotating the driving assembly 110, thereby achieving the purpose of rotating the plurality of bearing members 120 around the axis 10.

[0066] Specifically, the support member 140 can be rotatably arranged on the first bracket, and the cable accessory simulation component 200 is limited on the second bracket, and the support member 140 can be rotated to make the bearing member 120 and the second test piece 220 rotate relative to each other. A hand wheel 141 is arranged on the support member 140 to facilitate the operation of the tester.

[0067] It should be noted that when rotating the support member 140 to achieve the purpose of rotating the drive assembly 110 and multiple bearing members 120 around the axis 10, the rotation angle of the support member 140 should not be too large to avoid the corresponding oil pipe 113 or signal line from being entangled or torn.

[0068] like Figure 2 As shown, in some embodiments, each carrier 120 is provided with a positioning groove 121 on the side away from the axis 10, and the first test piece 130 is used to be arranged in the positioning groove 121; wherein, in the circumferential direction, both ends of the carrier 120 are provided with a chamfered structure on the side away from the axis 10.

[0069] It is understandable that during the mutual squeezing process between the first piece to be tested 130 and the second piece to be tested 220, a portion of the second piece to be tested 220 will extend into the gap 122, and rounded corners are provided on both ends of the carrier 120 on the side away from the axis 10 to prevent the sharp corners from piercing the second piece to be tested 220. In addition, when the operation of rotating multiple carriers 120 is performed during the process of the second piece to be tested 220 abutting against the first piece to be tested 130, the rotation operation is smoother.

[0070] Combination Figure 2 and Figure 3 Furthermore, the cable accessory interface pressure simulation test device also includes an air pump 500 and an air pipe 510 connected to the air pump 500, and the air pipe 510 is used to extend into the space surrounded by multiple supporting members 120; wherein, the cable accessory interface pressure simulation test device also includes a first sealing member 600 for sealing one end of the assembly hole 221, and a second sealing member 700 for sealing the other end of the assembly hole 221.

[0071] It should be noted that the air pipe 510 is used to extend into the space formed by multiple supporting parts 120, that is, during the test, the air pipe 510 extends into the assembly hole 221, and during the test, the first seal 600 and the second seal 700 can be used to seal the two ends of the assembly hole 221 respectively, and when the air pump 500 is inflated, the internal space of the assembly hole 221 can be pressurized.

[0072] It should be noted that the first sealing member 600 and / or the second sealing member is provided with through holes for the support member 140 and other lines or pipelines to pass through. Of course, a sealing ring can be provided in the through hole to ensure the sealing effect.

[0073] When the cable accessory interface pressure simulation test device of the present invention is used, first, multiple bearing members 120 are inserted into the assembly hole 221 of the second test member 220, so that the outer wall of each first test member 130 is opposite to the inner wall of the second test member 220, and then, the driving component 110 drives each first test member 130 to move toward the inner wall of the second test member 220, so that pressure is generated between the first test member 130 and the second test member 220, and then, the first sealing member 600 and the second sealing member 700 are used to seal the two ends of the assembly hole 221 respectively, and then, the air pump 500 is used to inflate the space in the assembly hole 221. During the inflation process, The support member 140 can be rotated to rotate the driving assembly 110, thereby achieving the purpose of rotating the multiple bearing members 120 around the axis 10. The rotation of the bearing member 120 can smooth the second test piece 220 that has been inserted into the gap 122. Due to the air pressure in the assembly hole 221, it will be more difficult for the second test piece 220 to be squeezed into the gap 122 after the position is changed (at least the rear part extending into the gap 122 is smaller than the front part extending into the gap 122). In this way, the interference fit between the first test piece 130 and the second test piece 220 during the test can be more in line with the actual situation, thereby improving the accuracy of the test results.

[0074] It is understandable that, for the second piece to be tested 220, the more part of it extends into the gap 122, the smaller the interference between the second piece to be tested 220 and the first piece to be tested 130 will be, and the greater the impact on the test result. The present application suppresses the amount of the second piece to be tested that extends into the gap 122 by air pressure, so that the interference between the second piece to be tested 220 and the first piece to be tested 130 during the test process can be more in line with the actual situation, thereby improving the accuracy of the test results.

[0075] It should also be noted that when the cable accessory interface pressure simulation test device is in use, the first test piece 130 and the second test piece 220 are first abutted against each other and pressure is generated, and then the sealed assembly hole 221 is inflated. This can avoid the pressurized air pressure from acting on the pressure sensor 300 in advance, resulting in the actual detection value of the pressure sensor 300 not being the interface pressure between the first test piece 130 and the second test piece 220. This is because, when the first test piece 130 and the second test piece 220 are abutted against each other and pressure is generated, the pressure sensor 300 will be surrounded and sealed by the first test piece 130 and the second test piece 220, and the pressurized air pressure will not act on the pressure sensor 300 from beginning to end. If the air pump 500 is used to pressurize the space in the assembly hole 221 before the first piece to be tested 130 and the second piece to be tested 220 abut against each other and generate pressure, then the pressurized air pressure will directly act on the pressure sensor 300, causing the pressure sensor 300 to obtain erroneous pressure information. Even if the driving component 110 finally drives the first piece to be tested 130 and the second piece to be tested 220 to be squeezed together, the pressure sensor 300 also detects the interface pressure between the first piece to be tested 130 and the second piece to be tested 220. However, the air pressure detected by the pressure sensor 300 during the intermediate period may cause the tester to misjudge and bring adverse effects to the test.

[0076] It is understandable that after the driving component 110 drives the first piece to be tested 130 and the second piece to be tested 220 to be squeezed together, before the sealed assembly hole 221 is pressurized, at this time, part of the second piece to be tested 220 has been squeezed into the gap 122. If only the assembly hole 221 is pressurized by ventilation, and the air pressure is used to help the second piece to be tested 220 squeezed into the gap 122 to reset, the required pressure is relatively large; and by rotating the bearing member 120, the bearing member 120 can smooth the second piece to be tested 220 squeezed into the gap 122 as soon as possible, so that the air pressure in the assembly hole 221 plays a role in suppressing the second piece to be tested from extending into the gap 122 after the displacement, so that the required pressure is not so large, and the gas filled by the air pump 500 can be smaller, which can save energy.

[0077] Furthermore, an air pressure sensor is provided in the assembly hole 221, and the air pressure sensor is used to detect the air pressure in the assembly hole 221. In this way, when the pressure values ​​measured by the air pressure sensor and the pressure sensor 300 are the same, the inflation into the assembly hole 221 can be stopped. In this way, the pressures at various locations on the inner wall of the second test piece can be made close, thereby further improving the reliability and accuracy of the test results.

[0078] like Figure 1As shown, in some embodiments, the inner wall of the cover body 210 includes a first conical wall 211, the outer wall of the second test piece 220 includes a second conical wall 222, the second conical wall 222 is coaxially arranged with the assembly hole 221, and the second conical wall 222 is arranged in close contact with the second conical wall 222; the cable accessory simulation component 200 also includes an adjustment mechanism 230 for adjusting the axial position of the second test piece 220, and the adjustment mechanism 230 can change the axial position of the second test piece 220 so that the cover body 210 changes the position of the second test piece 220, thereby adjusting the interface pressure between the second test piece 220 and the first test piece 130.

[0079] It should be noted that the cable accessory simulation component 200 can simulate the local structure of the cable terminal, and the structure of the cable terminal itself has the above-mentioned adjustment mechanism 230. The cable accessory simulation component 200 can further improve the accuracy of the simulation test results by setting the same adjustment mechanism 230 as the cable terminal.

[0080] Among them, the adjustment mechanism 230 includes a pad 231, an adjusting screw 232, an adjusting nut 233, a spring 234, a guide shaft 235 and a cone support 236. Specifically, the pad 231 is connected to the side of the cover body 210 close to the large diameter end of the first conical wall 211 through the adjusting screw 232, the adjusting nut 233 is sleeved on the adjusting screw 232, the cone support 236 is sleeved outside the second test piece 220, and the spring 234 is supported between the cone support 236 and the pad 231. The guide shaft 235 is connected to the cone support 236 for positioning the spring 234. By rotating the adjusting nut 233, the interface pressure between the second test piece 220 and the first test piece 130 can be adjusted.

[0081] The present invention also provides a cable accessory interface pressure simulation test method, which is applied to the above-mentioned cable accessory interface pressure simulation test device. The cable accessory interface pressure simulation test method comprises:

[0082] S100, inserting a plurality of carriers into the assembly holes of the second test piece so that the outer side walls of each first test piece are opposite to the inner side walls of the second test piece;

[0083] S200, the driving assembly drives each first piece to be tested to move toward the inner wall of the second piece to be tested, so that pressure is generated between the first piece to be tested and the second piece to be tested;

[0084] S300, using a first sealing member and a second sealing member to seal both ends of the assembly hole respectively;

[0085] S400, inflating the space in the assembly hole by using an air pump, and during the inflation process, rotating the plurality of bearing members so that the plurality of bearing members rotate around the axis.

[0086] When the cable accessory interface pressure simulation test device of the present invention is used, the first test piece 130 and the second test piece 220 are first abutted against each other and pressure is generated, and then the sealed assembly hole 221 is inflated. This can avoid the pressurized air pressure from acting on the pressure sensor 300 in advance, resulting in the actual detection value of the pressure sensor 300 not being the interface pressure between the first test piece 130 and the second test piece 220. This is because, when the first test piece 130 and the second test piece 220 are abutted against each other and pressure is generated, the pressure sensor 300 will be surrounded and sealed by the first test piece 130 and the second test piece 220, and the pressurized air pressure will not act on the pressure sensor 300 from beginning to end. If the air pump 500 is used to pressurize the space in the assembly hole 221 before the first piece to be tested 130 and the second piece to be tested 220 abut against each other and generate pressure, then the pressurized air pressure will directly act on the pressure sensor 300, causing the pressure sensor 300 to obtain erroneous pressure information. Even if the driving component 110 finally drives the first piece to be tested 130 and the second piece to be tested 220 to be squeezed together, the pressure sensor 300 also detects the interface pressure between the first piece to be tested 130 and the second piece to be tested 220. However, the air pressure detected by the pressure sensor 300 during the intermediate period may cause the tester to misjudge and bring adverse effects to the test.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cable accessory interface pressure simulation test device, characterized in that: include: A diameter adjustment mechanism, the diameter adjustment mechanism comprises a driving assembly and a plurality of bearings, the plurality of bearings are arranged around an axis in a circumferential direction, a side of each bearing away from the axis is used to carry a first piece to be tested, the first pieces to be tested on all the bearings cooperate to form a cable insulation layer simulation component, the driving assembly is used to drive each of the bearings to perform linear motion in a direction perpendicular to the axis, so that the outer diameter of the cable insulation layer simulation component changes; A cable accessory simulation component, the cable accessory simulation component comprising a cover body, and a second test piece arranged in the cover body, the second test piece is provided with an assembly hole, a plurality of the bearing members are passed through the assembly hole, so that the cable insulation layer simulation component is passed through the assembly hole; A pressure sensor is disposed between the first piece to be tested and the second piece to be tested, and is used to detect an interface pressure between the first piece to be tested and the second piece to be tested.

2. The cable accessory interface pressure simulation test device according to claim 1, characterized in that: The plurality of carriers are operable to rotate along the circumferential direction.

3. The cable accessory interface pressure simulation test device according to claim 2, characterized in that: The diameter adjustment mechanism further comprises a support member, the driving assembly is arranged on the support member, each of the bearing members is connected to the driving assembly, and the support member is operable to rotate along the circumferential direction.

4. The cable accessory interface pressure simulation test device according to claim 2, characterized in that: A positioning groove is provided on one side of each of the bearing members away from the axis, and the first to-be-tested member is used to be arranged in the positioning groove; Wherein, along the circumferential direction, both ends of the bearing member are provided with a rounded corner structure on one side away from the axis.

5. The cable accessory interface pressure simulation test device according to claim 2, characterized in that: It also includes an air pump and an air pipe connected to the air pump, wherein the air pipe is used to extend into the space formed by the plurality of the supporting members; The cable accessory interface pressure simulation test device also includes a first sealing member for sealing one end of the assembly hole, and a second sealing member for sealing the other end of the assembly hole.

6. The cable accessory interface pressure simulation test device according to claim 5, characterized in that: An air pressure sensor is arranged in the assembly hole.

7. The cable accessory interface pressure simulation test device according to claim 1, characterized in that: The driving assembly comprises a plurality of linear driving members, the plurality of linear driving members are arranged at intervals around the axis along the circumferential direction, and the plurality of linear driving members are drivingly connected to the plurality of supporting members in a one-to-one correspondence.

8. The cable accessory interface pressure simulation test device according to claim 1, characterized in that: The inner wall of the cover body includes a first conical wall, the outer wall of the second test piece includes a second conical wall, the second conical wall is coaxially arranged with the assembly hole, and the second conical wall is fitted with the second conical wall; The cable accessory simulation component also includes an adjustment mechanism for adjusting the axial position of the second test piece.

9. The cable accessory interface pressure simulation test device according to claim 1, characterized in that: A temperature sensor is also included, and the temperature sensor is used to detect the temperature of the first test piece and the second test piece.

10. A cable accessory interface pressure simulation test method, characterized in that: Applied to the cable accessory interface pressure simulation test device as described in claim 5 above, the cable accessory interface pressure simulation test method comprises: Inserting a plurality of the carriers into the assembly holes of the second test piece so that the outer side walls of the first test pieces are opposite to the inner side walls of the second test piece; The driving assembly drives each of the first pieces to be tested to move toward the inner wall of the second piece to be tested, so that pressure is generated between the first pieces to be tested and the second pieces to be tested; Using the first sealing member and the second sealing member to seal the two ends of the assembly hole respectively; The air pump is used to inflate the space in the assembly hole. During the inflation process, the plurality of bearing members are rotated so as to rotate around the axis.

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