Photovoltaic cable water and fire resistance testing machine

Abstract

The invention belongs to the technical field of detection equipment, particularly relates to a photovoltaic cable water and fire resistance testing machine, and aims to comprehensively evaluate the performance of a photovoltaic cable under extreme conditions. The testing machine integrates an external force detection device, a fire resistance detection device and a water resistance detection device, and the fire resistance, the water resistance and the external force resistance of the cable are tested by simulating fire and water immersion environments. The test cabinet is provided with a transparent observation cover, thereby facilitating the real-time monitoring of the test process, guaranteeing the accuracy and reliability of the test, and improving the safety and stability of the photovoltaic system.

Description

Technical Field

[0001] The invention relates to testing equipment, and more particularly to a photovoltaic cable water and fire resistance testing machine. Background Art

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, the photovoltaic industry, as an important component of clean energy, has continued to expand in scale and influence. In this context, photovoltaic cables, as key connecting components in solar power generation systems, have a direct impact on the reliability and safety of the entire photovoltaic system. Photovoltaic cables not only need to maintain stable power transmission in various harsh environments, but also have good fire and water resistance to cope with extreme conditions such as fire and flooding.

[0003] However, existing photovoltaic cable testing equipment is often unable to fully simulate extreme conditions such as fire and flooding in actual use environments, resulting in inaccurate and incomplete evaluation of photovoltaic cable performance. In particular, in fire resistance tests, traditional test equipment may not be able to provide a continuous and uniform high-temperature flame to verify the fire resistance and stability of cables at high temperatures. In terms of water resistance tests, existing equipment may lack long-term evaluation of the corrosion resistance and insulation performance of cables in water environments, and cannot fully simulate the flooding conditions that cables may encounter in actual use.

[0004] In addition, photovoltaic cables may also be affected by various external forces during use, such as torsion and swing, which will accelerate the wear of cable materials and affect their service life. However, existing testing equipment often ignores the simulation of these external forces and cannot fully evaluate the durability of photovoltaic cables in actual use.

[0005] The existing photovoltaic cable water and fire resistance test machine has deficiencies in simulating the actual use environment and evaluating the cable performance, and cannot meet the strict requirements of the photovoltaic industry for cable performance testing. Therefore, it is necessary to develop a new type of photovoltaic cable water and fire resistance test machine to more accurately simulate the extreme conditions in actual use, comprehensively evaluate the fire resistance, water resistance and external force resistance of photovoltaic cables, and thus improve the reliability and safety of photovoltaic systems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a photovoltaic cable water and fire resistance testing machine that solves the above technical problems.

[0007] To achieve the above object, the present invention provides the following technical solutions: A photovoltaic cable water and fire resistance tester includes a test cabinet, an external force detection device, a water resistance detection device and a fire resistance detection device, wherein the external force detection device, the fire resistance detection device and the water resistance detection device are all placed in the test cabinet. The test cabinet includes a cabinet body, an observation cover and two clamping and fixing mechanisms, wherein the observation cover is made of a transparent material and is installed on the cabinet body, and the two clamping and fixing mechanisms are respectively fixed on both sides of the cabinet body; the external force detection device includes a torsion mechanism and a swing mechanism, wherein the torsion mechanism is used for radial torsion of the cable, and the swing mechanism is used for push-pull swinging of the cable; the fire resistance detection device includes a combustion rack and a combustion nozzle, wherein the combustion nozzle is fixed on the combustion rack; the water resistance detection device includes a mounting platform, a simulation tube, a wear assembly and a water collecting tray, wherein the simulation tube and the water collecting tray are placed on the mounting platform, the wear assembly is placed in the simulation tube, and the water collecting tray is matched with the simulation tube.

[0008] Furthermore, the simulation tube includes an upper tube body and a lower tube body, the upper tube body and the lower tube body form a detection channel for the cable to pass through, the upper tube body has a water storage chamber and a water outlet hole connecting the water storage chamber and the detection channel, the lower tube body has an embedding groove for fixing the wear assembly, and the wear assembly includes one or more of metal spike bumps, sand and gravel bumps, soil blocks and cement bumps.

[0009] Furthermore, the lower tube body is fixed on the mounting platform, the upper tube body and the lower tube body are detachably connected, and the water collecting tray is fixed on the mounting platform and corresponds to the simulation tube.

[0010] Furthermore, the torsion mechanism includes a base frame, a first motor, a main bevel gear and two torsion components. The torsion components include bearings, rotating sleeves and locking kits. The two torsion components are respectively placed on both sides of the main bevel gear. The outer ring of the bearing is fixed on the base frame, the rotating sleeve passes through the bearing and is fixedly connected to the inner ring of the bearing, an auxiliary bevel gear meshing with the main bevel gear is fixed on one side of the rotating sleeve, the locking kit is detachably connected to the rotating sleeve, and the locking kit is used to fix the cable to the rotating sleeve.

[0011] Furthermore, the swing mechanism includes a second motor, a swing frame and a plurality of swing rods. The second motor is fixed on the platform. The swing frame is connected to the output end of the second motor. The swing rod includes a connecting rod body, a spring and an impact rod body connected in sequence. The connecting rod body is detachably connected to the swing frame, and the impact rod body is made of rubber, metal or plastic.

[0012] Furthermore, the swing frame includes a circular disk body, a plurality of locking bolts and a plurality of adjusting rods. The circular disk body is provided with an adjusting hole plugged into the adjusting rod and a through hole connected to the adjusting hole. The side wall of the adjusting rod is provided with a plurality of positioning holes corresponding to the through holes. The locking bolts can pass through the through holes and be threadedly connected to the positioning holes. The end of the adjusting rod is provided with a fixing hole threadedly connected to the connecting rod body.

[0013] Furthermore, the clamping and fixing mechanism includes a clamping seat and a clamping assembly. The clamping seat is fixed on the cabinet body. The clamping assembly includes a positioning tube, an anti-slip strip, a clamping member and a plurality of tightening rods. The positioning tube is fixed on the clamping seat. A first positioning groove and a second positioning groove corresponding to the anti-slip strip and the clamping member are respectively provided in the positioning tube. A threaded hole connected to the second positioning groove is opened on the positioning tube. The clamping member is composed of a plurality of clamping plates movably connected in sequence. The clamping plate is made of metal material. The tightening rod is threadedly connected to the threaded hole and can squeeze the clamping plate. A magnet is embedded on the end of the tightening rod.

[0014] Furthermore, the fire resistance detection device also includes a baffle and a receiving tray, the baffle is used to separate the space inside the cabinet into a first test chamber and a second test chamber, the combustion rack, combustion nozzle and receiving tray are all placed in the first test chamber, and the external force detection device and the water resistance detection device are placed in the second test chamber.

[0015] Furthermore, the locking kit includes an adjusting tube and a locking tube, a guide strip is provided on the inner wall of the rotating sleeve, a guide groove is provided on the outer wall of the adjusting tube which is slidably connected to the guide sleeve, one end of the adjusting tube can be extended into the rotating sleeve, an internal thread is provided on the inner wall of the adjusting tube, and the locking tube is composed of a rotating section and a clamping section connected to each other, an external thread is provided on the outer wall of the rotating section, and the clamping section is composed of a plurality of clamping plates arranged around the axis of the locking tube, the clamping plate is L-shaped, and a clamping protrusion which cooperates with the cable is provided on the clamping plate.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The testing machine of the present invention can simultaneously conduct comprehensive tests on the fire resistance, water resistance and external force resistance of photovoltaic cables, comprehensively evaluate the performance of the cables under extreme conditions, and improve the accuracy and reliability of the tests.

[0017] 2. Through the design of the simulation tube and the wear component, the present invention can simulate various wear conditions that the cable may encounter in actual use, including wear in different environments such as metal spikes, sand, gravel, soil and cement, thereby improving the simulation authenticity of the test. 3. The torsion mechanism and swing mechanism of the external force detection device can perform radial torsion and push-pull swing tests on the cable at the same time, saving test time and improving test efficiency.

[0018] 4. The design of the clamping and fixing mechanism makes the cable fixed stably, ensuring the accuracy and safety of the cable position during the test and avoiding test errors caused by cable displacement.

[0019] 5. The fire resistance detection device can provide continuous and uniform high-temperature flames through the design of the combustion rack and combustion nozzle, accurately simulating the fire resistance performance of the cable under fire conditions.

[0020] 6. The water resistance testing device can conduct long-term water immersion tests on cables through the design of simulated tubes, and effectively evaluate the corrosion resistance and insulation performance of cables in water environments.

[0021] 7. The testing machine of the present invention has a reasonable structural design, is easy to operate and maintain, and reduces the difficulty of use and maintenance costs for operators.

[0022] 8. Through the design of baffles, the fire resistance test is separated from other tests, avoiding the influence of the fire resistance test on other tests.

[0023] 9. The design of the receiving tray facilitates the collection of waste residues produced after cable combustion, simplifying the cleanup work after the test.

[0024] 10. The locking kit design of the present invention realizes accurate clamping and twisting of the cable through the cooperation of the adjustment tube and the locking tube, thereby improving the accuracy and reliability of the cable twisting test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0026] Figure 2 It is a schematic cross-sectional structural diagram of an embodiment of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the clamping and fixing mechanism.

[0028] Figure 4 It is a structural diagram of the torsion mechanism.

[0029] Figure 5 A schematic diagram of the local structure of the torsion component.

[0030] Figure 6 It is a structural diagram of the swing mechanism.

[0031] Figure 7 It is a schematic diagram of the structure of the swing frame and the swing rod.

[0032] Figure 8 It is a structural schematic diagram of the water resistance detection device.

[0033] Fig. 9 Schematic diagram of the cross-sectional structure of the simulated tube.

[0034] Fig.10 It is a schematic diagram of the structure of the lower tube body and the wear assembly.

[0035] Figure numerals: test cabinet 1, cabinet body 11, observation cover 12, clamping and fixing mechanism 13, clamping seat 131, clamping assembly 132, positioning tube 132a, anti-slip strip 132b, clamping member 132c, tightening rod 132d, first positioning groove 1301, second positioning groove 1302, threaded hole 1303; platform 2, external force detection device 3, torsion mechanism 31, base frame 311, first motor 312, main bevel gear 313, torsion assembly 314, bearing 314a, rotating sleeve 314b, locking kit 314c, adjusting tube 3101, locking tube 3102, rotating section 3102a, clamping section 3102b, clamping plate 30001, clamping protrusion 30002, guide strip 3103, guide groove 3104, internal thread 3105, external thread 3106, auxiliary bevel gear 315; pendulum The driving mechanism 32, the second motor 321, the swing frame 322, the circular disk 322a, the locking bolt 322b, the adjusting rod 322c, the swing rod 323, the connecting rod body 323a, the spring 323b, the striking rod body 323c, the adjusting hole 3201, the through hole 3202, the positioning hole 3203, and the fixing hole 3204; the water resistance detection device 4, the mounting platform 41, the simulation tube 42, the upper tube body 421, the lower tube body 422, the wear component 43, the metal spike protrusion 431, the sand and stone protrusion 432, the soil block 433, the cement protrusion 434, the water collecting tray 44, the detection channel 4201, the water outlet hole 4202, the embedding groove 4203, and the water storage chamber 4204; the fire resistance detection device 5, the combustion frame 51, the combustion nozzle 52, the baffle plate 53, the receiving tray 54, the first test chamber 501, and the second test chamber 502. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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.

[0038] like Figure 1 and Figure 2As shown, the photovoltaic cable water and fire resistance testing machine includes a test cabinet 1, a platform 2, an external force detection device 3, a water resistance detection device 4 and a fire resistance detection device 5. The external force detection device 3, the fire resistance detection device 5 and the water resistance detection device 4 are all placed on the platform 2 in the test cabinet.

[0039] like Figure 1 As shown, the test cabinet 1 includes a cabinet 11, an observation cover 12 and two clamping and fixing mechanisms 13. The observation cover 12 is made of a transparent material and is installed on the cabinet 11. The specific situation of the cable detection test inside the cabinet 11 can be seen through the observation cover 12. The two clamping and fixing mechanisms 13 are respectively fixed on both sides of the cabinet 11. When the cable is tested, the cable is passed through the cabinet 11, and the two clamping and fixing mechanisms 13 clamp and fix both sides of the cable to ensure that the detection test of the cable is carried out stably.

[0040] like Figure 3 As shown, the clamping and fixing mechanism 13 includes a clamping seat 131 and a clamping assembly 132. The clamping seat 131 is fixed on the cabinet 11, and the clamping assembly 132 is fixed on the clamping seat 131. The clamping assembly 132 is used for clamping and fixing cables, and stably fixing the cables on the cabinet 11. The clamping assembly 132 includes a positioning tube 132a, an anti-slip strip 132b, a clamping member 132c and a plurality of tightening rods 132d. The positioning tube 132a is fixed on the clamping seat 131, and a first positioning groove 1301 and a second positioning groove 1302 are provided in the positioning tube 132a for guiding and positioning the anti-slip strip 132b and the clamping member 132c respectively. The anti-slip strip 132b extends into the first positioning groove 1301 and can slide in the first positioning groove 1301, and the clamping member 132c extends into the second positioning groove 1302. The clamping member 132c is composed of a plurality of clamping pieces, which are made of metal material and arranged in sequence. Adjacent clamping pieces can be movably connected by connecting pieces such as rods, ropes, springs, hinges, etc. The positioning tube 132a is provided with a plurality of threaded holes 1303 connected to the second positioning groove 1302. The tightening rod 132d is threadedly connected to the threaded holes 1303 and extends into the positioning tube 132a to squeeze the clamping piece, thereby achieving the squeezing and fixing of the cable; a magnet is embedded on the end of the tightening rod 132d, which can be adsorbed and connected with the clamping piece, so as to ensure that the tightening rod 132d moves the clamping piece to the wall of the positioning tube 132a, ensuring the smooth passage of the cable.

[0041] The cable is placed on the cabinet 11 and fixed by the clamping and fixing mechanism 13; first, the cable is passed through the positioning tube 132a and placed between the anti-slip strip 132b and the clamping member 132c; then the tightening rod 132d is rotated so that the tightening rod 132d presses the clamping piece, and the clamping piece presses the cable on the anti-slip strip 132b, thereby fixing the cable. The anti-slip strip 132b may be provided with one or more of a plurality of rectangular strips, protrusions or anti-slip patterns to increase the friction between the cable and the anti-slip strip 132b.

[0042] like Figure 4-Figure 7 As shown, the external force detection device 3 includes a torsion mechanism 31 and a swing mechanism 32. The torsion mechanism 31 is used for radial torsion of the cable, and the swing mechanism 32 is used for push-pull swinging of the cable.

[0043] like Figure 4 and Figure 5 As shown, the torsion mechanism 31 includes a base frame 311, a first motor 312, a main bevel gear 313 and two torsion components 314, and the torsion components 314 include a bearing 314a, a rotating sleeve 314b and a locking kit 314c. The two torsion components 314 are respectively placed on both sides of the main bevel gear 313, the outer ring body of the bearing 314a is fixed on the base frame 311, the rotating sleeve 314b passes through the bearing 314a and is fixedly connected to the inner ring body of the bearing 314a, an auxiliary bevel gear 315 meshing with the main bevel gear 313 is fixed on one side of the rotating sleeve 314b, and the locking kit 314c includes an adjusting tube 3101 and a locking tube 3102, a guide strip 3103 is provided on the inner wall of the rotating sleeve 314b, and a guide groove 3104 slidably connected to the guide sleeve is provided on the outer wall of the adjusting tube 3101, and one end of the adjusting tube 3101 can be inserted into the rotating sleeve 314b, and the adjusting tube 3101 can be adjusted to the inner wall of the rotating sleeve 314b. An internal thread 3105 is provided on the inner wall of the tube 3101, and the locking tube 3102 is composed of a rotating section 3102a and a clamping section 3102b connected to each other. The locking tube 3102 is made of metal material, and an external thread 3106 threadedly connected to the internal thread 3105 is provided on the outer wall of the rotating section 3102a. The clamping section 3102b is composed of a plurality of clamping plates 30001 arranged around the axis of the locking tube 3102. The clamping plates 30001 are L-shaped or arc-shaped, and are provided with clamping protrusions 30002 that cooperate with the cables; the clamping protrusions 30002 can be cylindrical, truncated cone-shaped, toothed, pyramidal, etc.

[0044] The base frame 311 is fixed and provides a mounting platform for the bearing 314a, the rotating sleeve 314b and other components, and is the foundation of the entire mechanism. The first motor 312, as a power source, drives the entire torsion mechanism 31 to work and realize the torsion detection of the cable; after the first motor 312 is started, the power is transmitted through the main bevel gear 313, driving the auxiliary bevel gear 315 and the adjustment tube 3101 to rotate, and the cable is torsion. The main bevel gear 313 transmits the power of the first motor 312 and is the core component of power transmission; the main bevel gear 313 is connected to the first motor 312, and transmits the rotational motion of the first motor 312 to the auxiliary bevel gears 315 on both sides to realize the distribution and transmission of power. The torsion assembly 314 realizes the fixing and torsion of the cable and is the key part for realizing the torsion detection of the cable; the outer ring of the bearing 314a is fixed on the base frame 311, and the inner ring of the bearing 314a is fixedly connected with the rotating sleeve 314b, which plays the role of supporting and reducing friction; the rotating sleeve 314b passes through the bearing 314a and is fixedly connected with the inner ring of the bearing 314a, and an auxiliary bevel gear 315 meshing with the main bevel gear 313 is fixed on one side of the rotating sleeve 314b to realize the transmission of the rotational motion. The adjusting tube 3101 is connected with the locking tube 3102 through the internal thread 3105 to realize the clamping and torsion of the cable. The adjusting tube 3101 extends into the rotating sleeve 314b, and is slidably connected with the guide groove 3104 through the guide bar 3103 to realize the positioning of the adjusting tube 3101, ensuring that the adjusting tube 3101 is not easy to rotate radially relative to the rotating sleeve 314b. The adjusting tube 3101 and the locking tube 3102 in the locking kit 314c are used to adjust and lock the cable to achieve torsion detection of the cable.

[0045] When the cable is placed on the cabinet 11, the cable passes through the two torsion components 314, that is, the cable can pass through the locking tube 3102; at this time, the adjustment tube 3101 extends into the rotating sleeve 314b, and is slidably connected with the guide groove 3104 through the guide bar 3103, so that the positioning of the adjustment tube 3101 is achieved, ensuring that the adjustment tube 3101 is not easy to rotate radially relative to the rotating sleeve 314b; when the locking tube 3102 is installed on the adjustment tube 3101, the rotating section 3102a is threadedly connected to the adjustment tube 3101, and the plurality of clamping plates 3000 of the clamping section 3102b are connected to the adjustment tube 3101. 1 surrounds the cable and the clamping protrusion 30002 is pressed against the cable; when the first motor 312 is started, the main bevel gear 313 drives the two auxiliary bevel gears 315 to rotate relatively, thereby driving the two adjusting tubes 3101 to rotate relatively, and then driving the two locking tubes 3102 to rotate relatively, so that the clamping section 3102b drives the cable to twist, thereby realizing the twisting detection of the cable; and when the clamping section 3102b drives the cable to twist, the clamping protrusion 30002 will also cause wear to the cable, thereby further simulating the destructive test detection of the cable.

[0046] like Figure 6 and Figure 7As shown, the swing mechanism 32 includes a second motor 321, a swing frame 322 and a plurality of swing rods 323. The second motor 321 is fixed on the platform 2. The swing frame 322 is connected to the output end of the second motor 321. The swing rod 323 includes a connecting rod body 323a, a spring 323b and a striking rod body 323c which are connected in sequence. The striking rod body 323c is made of rubber, metal or plastic. The swing frame 322 includes a circular disk body 322a, a plurality of locking bolts 322b and a plurality of adjusting rods 322c. The circular disk body 322a is provided with an adjusting hole 3201 plugged into the adjusting rod 322c and a through hole 3202 connected to the adjusting hole 3201. The side wall of the adjusting rod 322c is provided with a plurality of positioning holes 3203 corresponding to the through hole 3202. The locking bolts 322b can pass through the through hole 3202 and be threadedly connected to the positioning holes 3203. The end of the adjusting rod 322c is provided with a fixing hole 3204 threadedly connected to the connecting rod body 323a.

[0047] Platform 2 is the support base of the swing mechanism 32, which is used to fix the second motor 321 to ensure the stability and reliability of the motor. The second motor 321 serves as the power source of the swing mechanism 32, and the second motor 321 is responsible for driving the movement of the entire swing mechanism 32. The start, stop and speed change of the second motor 321 directly affect the movement of the swing frame 322 and the swing rod 323. There are several swing rods 323, and the several swing rods 323 can be all the same, or different specifications can be selected; the striking rod bodies 323c of the several swing rods 323 can be made of rubber, metal or plastic to achieve different striking intensities. The setting of the spring 323b enables the striking rod body 323c to easily cross the cable after the striking is completed, avoiding jamming and ensuring the continuity and stability of the swing. The circular disc 322a is a part of the swing frame 322. The circular disc 322a is provided with an adjustment hole 3201 and a through hole 3202 for inserting the adjustment rod 322c and cooperating with a locking bolt 322b for adjusting the length of the adjustment rod 322c, thereby adjusting the distance between the striking rod 323c and the cable to meet different testing requirements. The connecting rod 323a is threadedly connected to the fixing hole 3204 on the adjustment rod 322c, thereby realizing the disassembly and replacement of the swing rod 323.

[0048] When the cable is fixed on the cabinet 11, the swing mechanism 32 is placed on one side of the cable, and the cable is subjected to a radial swing test through the swing rod 323. When the swing mechanism 32 is started, the second motor 321 drives the swing frame 322 to rotate, and the swing frame 322 drives the plurality of swing rods 323 to make circular motions, and the plurality of swing rods 323 strike the cable to realize the swing simulation of the cable being subjected to external force. When the swing rod 323 strikes the cable, the striking rod body 323c and the connecting rod body 323a connected by the spring 323b are shaped like nunchakus, and in combination with the rotating swing frame 322, a stable striking of the cable can be achieved; and due to the setting of the spring 323b, after the striking rod body 323c strikes the cable, it can also easily pass over the cable, and is not easy to cause a jam with the cable, which affects the striking test of the cable.

[0049] like Figure 8-Figure 10 As shown, the water resistance detection device 4 includes a mounting platform 41, a simulated tube 42, a wear assembly 43 and a water collecting tray 44. The simulated tube 42 and the water collecting tray 44 are placed on the mounting platform 41, the wear assembly 43 is placed in the simulated tube 42, and the water collecting tray 44 is placed below the simulated tube 42 and is used to receive sewage flowing out of the simulated tube 42. The simulated tube 42 includes an upper tube body 421 and a lower tube body 422, the upper tube body 421 and the lower tube body 422 form a detection channel 4201 for the cable to pass through, the upper tube body 421 has a water storage chamber 4204 and a water outlet 4202 connecting the water storage chamber 4204 and the detection channel 4201, the lower tube body 422 has an embedding groove 4203 for fixing the wear assembly 43, and the wear assembly 43 includes one or more of a metal spike bump 431, a sand and gravel bump 432, a soil block 433 and a cement bump 434. The lower tube body 422 is fixed on the mounting platform 41 , the upper tube body 421 is detachably connected to the lower tube body 422 , and the water collecting tray 44 is fixed on the mounting platform 41 and corresponds to the simulation tube 42 .

[0050] The mounting platform 41 is used to support and fix the simulation tube 42, the wear assembly 43, the water collecting tray 44 and other components. The water collecting tray 44 is placed under the simulation tube 42 to receive the sewage flowing out from the simulation tube 42. The design of the water collecting tray 44 facilitates the collection and discharge of sewage after the test, keeping the test environment clean. The water storage chamber 4204 is located inside the upper tube body 421 and is used to store test water; through the water outlet 4202, the water in the water storage chamber 4204 can flow into the detection channel 4201 and contact the cable to achieve water resistance detection of the cable. The embedding groove 4203 is located in the lower tube body 422 and is used to fix the wear assembly 43; through the embedding groove 4203, the wear assembly 43 can be stably installed in the simulation tube 42 to ensure that the wear assembly 43 will not shift during the test, thereby ensuring the stability and reliability of the test.

[0051] When the cable cooperates with the water resistance detection device 4, the cable passes through the simulation tube 42, that is, the cable passes through the detection channel 4201, and the cable contacts the wear component 43. When the swing mechanism 32 knocks the cable, one or more of the metal spike bumps 431, the gravel bumps 432, the soil block 433 or the cement bumps 434 can perform a wear test on the swinging cable; at the same time, the water in the upper tube body 421 also flows into the detection channel 4201 from the water outlet 4202, and the water contacts the cable to achieve the water resistance test of the cable; at the same time, because the wear component 43 causes wear to the cable, the water will penetrate into the worn part of the cable, further improving the wear test effect on the cable. The metal spike bumps 431, the gravel bumps 432, the soil block 433 and the cement bumps 434 can simulate the wear of the cable in various environmental conditions, greatly improving the wear test effect on the cable.

[0052] like Figure 2 As shown, the fire resistance detection device 5 includes a combustion rack 51, a combustion nozzle 52, a baffle plate 53 and a receiving tray 54. The combustion nozzle 52 is fixed on the combustion rack 51. The baffle plate 53 is used to divide the space inside the cabinet 11 into a first test chamber 501 and a second test chamber 502. The combustion rack 51, the combustion nozzle 52 and the receiving tray 54 are all placed in the first test chamber 501, and the external force detection device 3 and the water resistance detection device 4 are placed in the second test chamber 502.

[0053] The combustion rack 51 is made of heat-resistant material to withstand the continuous combustion of high-temperature flames. The fire-resistant detection device 5 can use heat-resistant nozzle mixing burners, which use liquefied petroleum gas and are equipped with flame monitoring devices to ensure combustion safety; they are equipped with flame safety systems, intermittent ignition systems and temperature sensors to achieve precise control of flames. The observation cover 12 is made of heat-resistant quartz glass, which is convenient for the operator to observe the entire sample during the test; this helps to monitor the test progress and sample status in real time to ensure the accuracy and effectiveness of the test.

[0054] When the cable is placed on the cabinet 11, the combustion nozzle 52 is opposite to the cable, and the fire is sprayed out from the combustion nozzle 52 to perform a combustion test on the cable; the baffle 53 is used to separate the fire resistance test from other tests, so that the fire resistance test is not easy to affect other tests; the receiving tray 54 is used to receive the waste residue generated after the cable is burned, which is convenient for the subsequent cleaning of the cabinet 11.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic cable water and fire resistance testing machine, characterized in that: include The test cabinet comprises a cabinet body, an observation cover and two clamping and fixing mechanisms, wherein the observation cover is made of a transparent material and is installed on the cabinet body, and the two clamping and fixing mechanisms are respectively fixed on both sides of the cabinet body; The external force detection device includes a torsion mechanism and a swing mechanism, wherein the torsion mechanism is used for radial torsion of the cable, and the swing mechanism is used for push-pull swing of the cable; The fire-resistant detection device comprises a combustion frame and a combustion nozzle, wherein the combustion nozzle is fixed on the combustion frame; The water resistance testing device comprises a mounting platform, a simulated tube, a wear assembly and a water collecting tray. The simulated tube and the water collecting tray are placed on the mounting platform, the wear assembly is placed in the simulated tube, and the water collecting tray is matched with the simulated tube; The external force detection device, the fire resistance detection device and the water resistance detection device are all placed in the test cabinet.

2. A photovoltaic cable water and fire resistance testing machine according to claim 1, characterized in that: The simulation tube comprises an upper tube body and a lower tube body, wherein the upper tube body and the lower tube body form a detection channel for the cable to pass through, the upper tube body has a water storage cavity and a water outlet hole connecting the water storage cavity and the detection channel, and the lower tube body has an embedding groove for fixing the wear component. The wear components include one or more of metal spike bumps, sand and gravel bumps, soil blocks and cement bumps.

3. A photovoltaic cable water and fire resistance testing machine according to claim 2, characterized in that: The lower tube body is fixed on the mounting platform, the upper tube body is detachably connected to the lower tube body, and the water collecting tray is fixed on the mounting platform and corresponds to the simulation tube.

4. A photovoltaic cable water and fire resistance testing machine according to claim 1, characterized in that: The torsion mechanism includes a base frame, a first motor, a main bevel gear and two torsion components. The torsion components include a bearing, a rotating sleeve and a locking kit. The two torsion components are respectively placed on both sides of the main bevel gear. The outer ring body of the bearing is fixed on the base frame, the rotating sleeve passes through the bearing and is fixedly connected to the inner ring body of the bearing, an auxiliary bevel gear meshing with the main bevel gear is fixed on one side of the rotating sleeve, the locking kit is detachably connected to the rotating sleeve, and the locking kit is used to fix the cable to the rotating sleeve.

5. The photovoltaic cable water and fire resistance testing machine according to claim 1, characterized in that: The swing mechanism includes a second motor, a swing frame and a plurality of swing rods. The swing frame is connected to the output end of the second motor. The swing rod includes a connecting rod body, a spring and a striking rod body connected in sequence. The connecting rod body is detachably connected to the swing frame. The striking rod body is made of rubber, metal or plastic.

6. A photovoltaic cable water and fire resistance testing machine according to claim 5, characterized in that: The swing frame includes a circular disk body, a plurality of locking bolts and a plurality of adjusting rods. The circular disk body is provided with an adjusting hole plugged into the adjusting rod and a through hole connected to the adjusting hole. The side wall of the adjusting rod is provided with a plurality of positioning holes corresponding to the through holes. The locking bolts can pass through the through holes and be threadedly connected to the positioning holes. The end of the adjusting rod is provided with a fixing hole threadedly connected to the connecting rod body.

7. A photovoltaic cable water and fire resistance testing machine according to claim 1, characterized in that: The clamping and fixing mechanism comprises a clamping seat and a clamping assembly, wherein the clamping seat is fixed on the cabinet. The clamping assembly includes a positioning tube, an anti-slip strip, a clamping member and a plurality of tightening rods. The positioning tube is fixed on the clamping seat. A first positioning groove and a second positioning groove corresponding to the anti-slip strip and the clamping member are respectively provided in the positioning tube. A threaded hole connected to the second positioning groove is opened on the positioning tube. The clamping member is composed of a plurality of clamping plates movably connected in sequence. The clamping plates are made of metal material. The tightening rod is threadedly connected to the threaded hole and can squeeze the clamping plate. A magnet is embedded on the end of the tightening rod.

8. A photovoltaic cable water and fire resistance testing machine according to any one of claims 1 to 7, characterized in that: The fire resistance detection device also includes a baffle and a receiving tray. The baffle is used to separate the space inside the cabinet into a first test chamber and a second test chamber. The combustion rack, combustion nozzle and receiving tray are all placed in the first test chamber, and the external force detection device and the water resistance detection device are placed in the second test chamber.

9. A photovoltaic cable water and fire resistance testing machine according to claim 4, characterized in that: The locking kit comprises an adjusting tube and a locking tube, a guide strip is arranged on the inner wall of the rotating sleeve, a guide groove slidably connected with the guide sleeve is arranged on the outer wall of the adjusting tube, one end of the adjusting tube can extend into the rotating sleeve, and an internal thread is arranged on the inner wall of the adjusting tube. The locking tube is composed of a rotating section and a clamping section connected to each other. The outer wall of the rotating section is provided with an external thread. The clamping section is composed of a plurality of clamping plates arranged around the axis of the locking tube. The clamping plates are L-shaped and are provided with clamping protrusions that cooperate with the cables.

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