A strength testing equipment for the production of MPP cable protection tubes

Abstract

The present invention provides a strength test equipment for the production of MPP cable protection tubes, which relates to the technical field of MPP cable protection tube testing, including: a test body, wherein guide grooves are provided at the left and right ends of the front side of the test body; transmission grooves are also provided at the left and right sides of the guide grooves; the transmission grooves are composed of an oblique groove and a vertical groove; a transmission column of a cylindrical structure is slidably installed inside the transmission groove; and two stretching grooves are provided at the center of the front side of the test body in a symmetrical arrangement. The present invention combines the two strength tests of extrusion and stretching together, which directly reduces one test step compared to traditional strength test equipment, improves the test efficiency of the strength test equipment, and solves the problem that the current test equipment for the extrusion and stretching of MPP cable protection tubes is mostly carried out in steps, and the two-step test method reduces the test efficiency of the MPP cable protection tube.

Description

Technical Field

[0001] The invention relates to the technical field of MPP cable protection tube testing, and in particular to a strength testing device for producing MPP cable protection tubes. Background Art

[0002] MPP cable protection pipe is a pipe with modified polypropylene as the main material. The cable can be effectively protected by laying the MPP cable protection pipe on the outside of the cable. After the MPP cable protection pipe is processed and produced, in order to ensure the quality of the MPP cable protection pipe that will subsequently enter the market, it is necessary to take samples of the MPP cable protection pipe and conduct strength tests. Strength testing of the MPP cable protection pipe requires the use of strength testing equipment.

[0003] When the existing MPP cable protection tube strength test equipment is used, in order to ensure the comprehensiveness of the test, the MPP cable protection tube is usually subjected to an extrusion strength test and a tensile strength test. However, the current test equipment mostly performs these two tests on the MPP cable protection tube in steps, and the two-step test method reduces the test efficiency of the MPP cable protection tube. Therefore, the present invention improves a strength test equipment that can quickly perform an extrusion test and a tensile test on the MPP cable protection tube. Summary of the invention

[0004] The disclosed embodiment relates to a strength testing device for the production of MPP cable protection tubes, which works through a transmission motor, so that the transmission motor moves upward with a test slide and a protection tube sample to be tested under the action of a structure. During the movement, a corresponding tensile component will perform a tensile strength test on the protection tube sample to be tested. If the protection tube sample to be tested meets the standard in the tensile test, the test slide and the protection tube sample to be tested continue to rise, and an extrusion strength test can be performed on the protection tube sample to be tested using a corresponding extrusion component.

[0005] According to a first aspect of the present disclosure, there is provided a strength testing device for the production of MPP cable protection tubes, which specifically comprises: a testing body, wherein guide grooves are provided at the left and right ends of the front side of the testing body; transmission grooves are also provided at the left and right sides of the guide grooves; the transmission grooves are composed of an oblique groove and a vertical groove; a transmission column of a cylindrical structure is slidably installed inside the transmission groove; two stretching grooves are arranged symmetrically in the center of the front side of the testing body; the stretching grooves are composed of two oblique grooves and three vertical grooves; a stretching guide rail is fixedly installed on the front side of the testing body; a connecting piece is fixedly installed on the front top of the stretching guide rail; an extrusion test piece is fixedly installed on the front end of the connecting piece; a transmission screw is rotatably installed on the bottom of the testing body; a transmission motor is fixedly installed on the top of the stretching guide rail; the output shaft of the transmission motor is connected to the top of the transmission screw; a test slide is slidably installed on the stretching guide rail.

[0006] In at least some embodiments, the test slide is connected to the transmission screw through threads; a limit support is fixedly installed on the front side of the test slide; a protective tube sample to be tested is placed inside the limit support; the protective tube sample to be tested is located below the extrusion test piece; guide rods are fixedly installed on the left and right sides of the test slide; a limit plate with a disc-shaped structure is fixedly installed on the outer end of the guide rod; a stretching slide is slidably installed on the guide rod; and a stretching slide column with a cylindrical structure is fixedly installed on the rear end of the stretching slide.

[0007] In at least some embodiments, the stretching slide is also slidably installed inside the stretching groove; one end of the restoring spring A is embedded and installed on the top of the outer side of the stretching slide; the other end of the restoring spring A is embedded and installed on the inner side of the limit plate; an embedded plate A is also fixedly installed on the outer side of the stretching slide; a clamping seat is fixedly installed on the front end of the stretching slide; a clamping groove is provided on the inner side of the clamping seat; a clamping piece is slidably installed inside the clamping groove; and an arc-shaped friction groove is provided at the inner end of the clamping piece.

[0008] In at least some embodiments, one end of a restoring spring B is embedded and installed on the inner side of the clamping member; the other end of the restoring spring B is embedded and installed on the inner wall of the clamping groove; a driven column with a cylindrical structure is fixedly installed on the outer end of the clamping member; a transmission shaft is rotatably installed at the center position of the outer side of the clamping seat; a transmission gear is fixedly installed on the outer end of the transmission shaft; a transmission disk with a disc-shaped structure is fixedly installed on the circumferential outer wall of the transmission shaft; a tension groove with an arc structure is opened on the outer side of the transmission disk; and the driven column is also slidably installed inside the tension groove.

[0009] In at least some embodiments, a conversion slide is slidably installed on the inner and outer sides of the stretching slide; a conversion rack is fixedly installed on the inner front end of the conversion slide; the conversion rack is meshed and connected with the transmission gear; a connecting plate is fixedly installed on the rear end of the conversion slide; the connecting plate is also slidably connected to the transmission column; an embedded plate B is fixedly installed on the outer side of the conversion slide; one end of the restoring spring C is embedded and installed on the front side of the embedded plate B; the other end of the restoring spring C is embedded and installed on the rear side wall of the embedded plate A.

[0010] The present invention provides a strength test device for the production of MPP cable protection tubes, which has the following beneficial effects:

[0011] (a) The present invention only requires the operation of the transmission motor to control the test slide and the protective tube sample to be tested to rise. During the rising process, the corresponding tensile component in the test equipment will give priority to performing a tensile strength test on the protective tube sample to be tested. If the protective tube sample to be tested obtains a qualified result in the tensile test, the test slide continues to rise to complete the extrusion strength test on the protective tube sample to be tested. In this way, the two strength tests are completed together. Compared with the traditional strength test equipment, one test step is directly reduced, thereby improving the test efficiency of the strength test equipment.

[0012] (ii) In the present invention, when the test slide rises to complete the tensile test of the protective tube sample to be tested, the conversion slide and the transmission column will indirectly control the two clamping parts to move inward along the clamping groove with the cooperation of the transmission groove, so that the clamping parts can clamp and fix the two ends of the protective tube sample to be tested in advance by moving inward, so that when the stretching slide slides into the inclined groove part of the stretching groove, the clamping parts will clamp the two ends of the protective tube sample to be tested and follow the outward movement of the stretching slide to complete the test. In this way, during the test, it is only necessary to place the protective tube sample to be tested and start the transmission motor, so that the test equipment does not have lengthy clamping work before the experiment, thereby improving the test efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0014] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0015] In the attached picture:

[0016] Figure 1 A schematic diagram showing the overall structure of the present application;

[0017] Figure 2 The schematic diagram of the overall split state structure of the present application is shown;

[0018] Figure 3A schematic diagram of the structure of the stretching guide rail of the present application in a removed state is shown;

[0019] Figure 4 A schematic diagram of the test slide structure of the present application is shown;

[0020] Figure 5 This application shows Figure 4 Another perspective structural diagram of;

[0021] Figure 6 A schematic diagram of the structure of the test slide in the disassembled state of the present application is shown;

[0022] Figure 7 The schematic diagram of the structure of the stretching slide and the conversion slide of the present application is shown;

[0023] Figure 8 A schematic diagram of the structure of the stretching slide and the clamping member of the present application is shown;

[0024] Reference numerals list

[0025] 1. Test machine body; 2. Guide groove; 3. Transmission groove; 4. Transmission column; 5. Stretch groove; 6. Stretch guide rail; 7. Connector; 8. Extrusion test piece; 9. Transmission screw; 10. Transmission motor;

[0026] 11. Test slide; 12. Limiting bracket; 13. Protective tube sample to be tested; 14. Guide rod; 15. Limiting plate; 16. Stretch slide; 17. Stretch slide column; 18. Restoring spring A; 19. Mounting plate A; 20. Clamping seat;

[0027] 21. Clamping groove; 22. Clamping piece; 23. Restoring spring B; 24. Driven column; 25. Transmission shaft; 26. Transmission gear; 27. Transmission plate; 28. Tension groove; 29. ​​Conversion slide; 30. Conversion rack; 31. Connecting plate; 32. Mounting plate B; 33. Restoring spring C. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment 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.

[0029] Please refer to Figures 1 to 8 :

[0030] Embodiment 1:

[0031] The present invention proposes a strength testing device for the production of MPP cable protection tubes, comprising: a testing body 1, wherein guide grooves 2 are provided at the left and right ends of the front side of the testing body 1; transmission grooves 3 are also provided on the left and right sides of the guide grooves 2; the transmission grooves 3 are composed of an oblique groove and a vertical groove; a transmission column 4 of a cylindrical structure is slidably installed inside the transmission groove 3; two stretching grooves 5 are arranged symmetrically in the center of the front side of the testing body 1; the stretching grooves 5 are composed of two oblique grooves and three vertical grooves; a stretching guide rail 6 is fixedly installed on the front side of the testing body 1; a connecting piece 7 is fixedly installed on the front top of the stretching guide rail 6; an extrusion test piece 8 is fixedly installed on the front end of the connecting piece 7; a transmission screw 9 is rotatably installed on the bottom of the testing body 1; a transmission motor 10 is fixedly installed on the top of the stretching guide rail 6; the output shaft of the transmission motor 10 is connected to the top of the transmission screw 9; and a test slide 11 is slidably installed on the stretching guide rail 6.

[0032] By placing the protection tube sample 13 to be tested on the limit support 12, and making the two ends of the protection tube sample 13 to be tested abut against the inner side of the clamping seat 20, and then starting the transmission motor 10, the transmission motor 10 drives the transmission screw 9 to rotate, so that the transmission screw 9 rotates and drives the test slide 11 and the protection tube sample 13 to be tested placed on the limit support 12 to move upward. During the movement, the transmission column 4 will slide from the inclined groove part of the transmission groove 3 into the vertical groove part, so that the transmission column 4 preferentially drives the connecting plate 31, the conversion slide 29 and The conversion rack 30 moves forward, so that the conversion rack 30 moves forward and cooperates with the transmission gear 26 to rotate the transmission shaft 25 and the transmission disk 27, so that the transmission disk 27 rotates and uses the arc structure of the tension groove 28 to pull the driven column 24 and the clamping member 22 inward along the clamping groove 21, so that the clamping member 22 moves inward to clamp the two ends of the protective tube sample 13 to be tested, thereby completing the clamping and positioning of the protective tube sample 13 to be tested, which is convenient for the subsequent tensile strength test of the protective tube sample 13 to be tested.

[0033] Embodiment 2, on the basis of embodiment 1, the test slide 11 is connected to the transmission screw 9 through threads; a limit bracket 12 is fixedly installed on the front side of the test slide 11; a protective tube sample 13 to be tested is placed inside the limit bracket 12; the protective tube sample 13 to be tested is located below the extrusion test piece 8; guide rods 14 are fixedly installed on the left and right sides of the test slide 11; a limit plate 15 of a disc-shaped structure is fixedly installed on the outer end of the guide rod 14; a stretching slide 16 is slidably installed on the guide rod 14; a cylindrical A stretching slide post 17 of a shaped structure; the stretching slide post 17 is also slidably installed inside the stretching groove 5; one end of a restoring spring A18 is embedded and installed on the top of the outer side of the stretching slide seat 16; the other end of the restoring spring A18 is embedded and installed on the inner side of the limit plate 15; an embedded plate A19 is also fixedly installed on the outer side of the stretching slide seat 16; a clamping seat 20 is fixedly installed on the front end of the stretching slide seat 16; a clamping groove 21 is provided on the inner side of the clamping seat 20; a clamping member 22 is slidably installed inside the clamping groove 21; an arc-shaped friction groove is provided on the inner end of the clamping member 22;

[0034] By moving the test slide 11 upward, the stretching slide 17 will slide from the vertical groove below the stretching groove 5 into the inclined groove below, so that the stretching slide 17 uses the inclined groove to move the stretching slide 16 outward along the guide rod 14. During the movement, the stretching slide 16 will move outward synchronously with the clamping seat 20 and the conversion slide 29, so that the clamping seat 20 will move outward to pull the two ends of the protective tube sample 13 to be tested, and a tensile strength test will be performed on the protective tube sample 13 to be tested. If the protective tube sample 13 to be tested is damaged in the tensile strength test step, it means that the quality of this batch of MPP cable protection tubes does not meet the standards. If the protective tube sample 13 to be tested does not break in the stretching step, it means that the tensile strength of the protective tube sample 13 to be tested meets the standards.

[0035] Embodiment 3, on the basis of embodiment 2, one end of a restoring spring B23 is embedded and installed on the inner side of the clamping member 22; the other end of the restoring spring B23 is embedded and installed on the inner side wall of the clamping groove 21; a driven column 24 of a cylindrical structure is fixedly installed on the outer end of the clamping member 22; a transmission shaft 25 is rotatably installed at the center position of the outer side of the clamping seat 20; a transmission gear 26 is fixedly installed on the outer end of the transmission shaft 25; a transmission disk 27 of a disc-shaped structure is fixedly installed on the circumferential outer wall of the transmission shaft 25; a tension groove 28 of an arc structure is opened on the outer side of the transmission disk 27; the driven column 24 is also Slidingly mounted inside the tension groove 28; a conversion slide 29 is slidably mounted inside and outside the tension slide 16; a conversion rack 30 is fixedly mounted on the front end of the conversion slide 29; the conversion rack 30 is meshed and connected with the transmission gear 26; a connecting plate 31 is fixedly mounted on the rear end of the conversion slide 29; the connecting plate 31 is also slidably connected with the transmission column 4; an embedded plate B32 is fixedly mounted on the outside of the conversion slide 29; one end of a restoring spring C33 is embedded and mounted on the front side of the embedded plate B32; the other end of the restoring spring C33 is embedded and mounted on the rear side wall of the embedded plate A19;

[0036] By moving the test slide 11 upward, the stretching slide 17 moves upward and enters the vertical groove in the middle of the stretching groove 5, the upper inclined groove and the upper vertical groove in sequence, so that the stretching of the protective tube sample 13 to be tested is cancelled by this step of the stretching slide 17. Then, when the test slide 11 continues to move upward, the extrusion test piece 8 will contact the protective tube sample 13 to be tested, and the extrusion strength test will be performed on the protective tube sample 13 to be tested. If the protective tube sample 13 to be tested is damaged, it means that the quality of this batch of MPP cable protection tubes needs to be improved. If the protective tube sample 13 to be tested is still not damaged, it means that the extrusion strength of the protective tube sample 13 to be tested meets the standard, which proves that the quality of this batch of MPP cable protection tubes is high.

[0037] Working principle:

[0038] During the test, the protective tube sample 13 to be tested is first placed on the limit support 12, and the two ends of the protective tube sample 13 to be tested are abutted against the inner side of the clamping seat 20, and then the transmission motor 10 is started to rotate the transmission screw 9, so that the transmission screw 9 rotates and drives the test slide 11 and the protective tube sample 13 to be tested placed on the limit support 12 to move upward. During the movement, the transmission column 4 will slide from the inclined groove part of the transmission groove 3 into the vertical groove part, so that the transmission column 4 preferentially drives the connecting plate 31, the conversion slide 29 and the conversion rack 30 to move forward, so that the conversion rack 30 moves forward and is connected with the transmission gear 26 The transmission shaft 25 and the transmission disk 27 rotate, so that the transmission disk 27 rotates and uses the arc structure of the tension groove 28 to pull the driven column 24 and the clamping member 22 inward along the clamping groove 21, so that the clamping member 22 can clamp the two ends of the protection tube sample 13 to be tested by moving inward, and the clamping positioning of the protection tube sample 13 to be tested is completed. Then, by moving the test slide 11 upward, the stretching slide 17 will slide from the vertical groove below the stretching groove 5 into the inclined groove below, so that the stretching slide 17 uses the inclined groove to move outward along the guide rod 14 with the stretching slide 16. During the movement, the stretching slide 16 will The clamping seat 20 and the conversion slide 29 move outward synchronously, so that the clamping seat 20 pulls the two ends of the protection tube sample 13 to be tested by moving outward, and performs a tensile strength test on the protection tube sample 13 to be tested. If the protection tube sample 13 to be tested is damaged in the tensile strength test step, it means that the quality of the batch of MPP cable protection tubes does not meet the standard. If the protection tube sample 13 to be tested does not break in the stretching step, it means that the tensile strength of the protection tube sample 13 to be tested meets the standard. Then continue to move upward through the test slide 11, so that the stretching slide 17 moves upward and enters the vertical groove in the middle of the stretching groove 5, the upper groove 17 and the lower groove 17 in turn. The inclined groove on the side and the vertical groove above, thereby canceling the stretching of the protection tube sample 13 to be tested by stretching the slide column 17, and then when the test slide 11 continues to move upward, the extrusion test piece 8 will contact the protection tube sample 13 to be tested, and the protection tube sample 13 to be tested will be subjected to an extrusion strength test. If the protection tube sample 13 to be tested is damaged, it means that the quality of this batch of MPP cable protection tubes needs to be improved. If the protection tube sample 13 to be tested is still not damaged, it means that the extrusion strength of the protection tube sample 13 to be tested is up to standard, which proves that this batch of MPP cable protection tubes has high quality.

[0039] In this article, there are a few points to note:

[0040] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0041] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0042] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A strength test equipment for the production of MPP cable protection tubes, comprising: A test body (1), wherein guide grooves (2) are provided at the left and right ends of the front side of the test body (1); the guide groove (2) is characterized in that transmission grooves (3) are provided on the left and right sides of the inside; the transmission groove (3) is composed of an oblique groove and a vertical groove; a transmission column (4) of a cylindrical structure is slidably installed inside the transmission groove (3); two stretching grooves (5) are provided at the center position of the front side of the test body (1) in a symmetrical arrangement; the stretching groove (5) is composed of two oblique grooves and three vertical grooves; A stretching guide rail (6) is fixedly mounted on the front side of the test body (1); a connecting piece (7) is fixedly mounted on the front top of the stretching guide rail (6); an extrusion test piece (8) is fixedly mounted on the front end of the connecting piece (7); a transmission screw (9) is rotatably mounted on the bottom of the test body (1); a transmission motor (10) is fixedly mounted on the top of the stretching guide rail (6); an output shaft of the transmission motor (10) is connected to the top of the transmission screw (9); a test slide seat (11) is slidably mounted on the stretching guide rail (6); The test slide (11) is connected to the transmission screw (9) via threads; a limit bracket (12) is fixedly mounted on the front side of the test slide (11); a protective tube sample (13) to be tested is placed inside the limit bracket (12); the protective tube sample (13) to be tested is located below the extrusion test piece (8); guide rods (14) are fixedly mounted on the left and right sides of the test slide (11); a limit plate (15) with a disc-shaped structure is fixedly mounted on the outer end of the guide rod (14); a stretching slide (16) is slidably mounted on the guide rod (14); a stretching slide column (17) with a cylindrical structure is fixedly mounted on the rear end of the stretching slide (16); The stretching slide column (17) is also slidably mounted inside the stretching groove (5); one end of a restoring spring A (18) is embedded and mounted on the top of the outer side of the stretching slide seat (16); the other end of the restoring spring A (18) is embedded and mounted on the inner side of the limit plate (15); an embedding plate A (19) is also fixedly mounted on the outer side of the stretching slide seat (16); a clamping seat (20) is fixedly mounted on the front end of the stretching slide seat (16); a clamping groove (21) is provided on the inner side of the clamping seat (20); a clamping member (22) is slidably mounted inside the clamping groove (21); an arc-shaped friction groove is provided on the inner end of the clamping member (22); and the inner side of the clamping member (22) is embedded with a One end of the restoring spring B (23) is installed in the clamping seat (20); the other end of the restoring spring B (23) is embedded in the inner wall of the clamping groove (21); a driven column (24) with a cylindrical structure is fixedly installed on the outer end of the clamping member (22); a transmission shaft (25) is rotatably installed at the center of the outer side of the clamping seat (20); a transmission gear (26) is fixedly installed on the outer end of the transmission shaft (25); a transmission disk (27) with a disc-shaped structure is fixedly installed on the circumferential outer wall of the transmission shaft (25); a tension groove (28) with an arc structure is opened on the outer side of the transmission disk (27); and the driven column (24) is also slidably installed inside the tension groove (28); A conversion slide (29) is slidably mounted on the inner and outer sides of the stretching slide (16); a conversion rack (30) is fixedly mounted on the inner front end of the conversion slide (29); the conversion rack (30) is meshingly connected with the transmission gear (26); a connecting plate (31) is fixedly mounted on the rear end of the conversion slide (29); the connecting plate (31) is also slidably connected with the transmission column (4); an embedded plate B (32) is fixedly mounted on the outer side of the conversion slide (29); one end of a restoring spring C (33) is embedded and mounted on the front side of the embedded plate B (32); the other end of the restoring spring C (33) is embedded and mounted on the rear side wall of the embedded plate A (19).

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