Cable protection pipe use intensity test equipment and working method

Abstract

The application discloses a strength test equipment and working method for cable protection pipe production, which comprises the following steps: firstly, placing a to-be-tested protection pipe sample on a limiting support, clamping and positioning the to-be-tested protection pipe sample; making the test sliding seat continue to move upward, stretching the clamping seat to pull the two ends of the to-be-tested protection pipe sample, and performing tensile strength test on the to-be-tested protection pipe sample; continuing to make the test sliding seat move upward, making the stretching sliding column enter the vertical groove in the middle of the stretching groove, the inclined groove above and the vertical groove above in sequence by moving upward, and canceling the stretching of the to-be-tested protection pipe sample through the step; and then, when the test sliding seat continues to move upward, the extrusion test piece contacts the to-be-tested protection pipe sample, and the extrusion strength test is performed on the to-be-tested protection pipe sample. The extrusion and tensile strength tests are combined together in the application, one test step is directly reduced compared with the traditional strength test equipment, and the test efficiency of the strength test equipment is improved.

Description

[0001] This application is a divisional application, the original application number is 2024110017727, the original application date is 2024.07.25, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of MPP cable protection pipe test, in particular to a cable protection pipe use strength test equipment and its working method. BACKGROUND

[0003] MPP cable protection pipe is a kind of pipeline with modified polypropylene as main material, which can effectively protect the cable by laying MPP cable protection pipe outside the cable. In order to ensure the quality of MPP cable protection pipe flowing into the market after processing and production, MPP cable protection pipe needs to be sampled and strength tested. The strength test of MPP cable protection pipe requires a strength test equipment.

[0004] The existing MPP cable protection pipe strength test equipment, in order to ensure the comprehensiveness of the test, usually carries out extrusion type strength test and tensile type strength test on the MPP cable protection pipe. However, the current test equipment carries out the two tests on the MPP cable protection pipe in two steps, which reduces the test efficiency of the MPP cable protection pipe. Therefore, the present application improves a strength test equipment which can quickly carry out extrusion test and tensile test on the MPP cable protection pipe. SUMMARY

[0005] The strength test equipment for MPP cable protection pipe production of the present application is characterized in that the transmission motor is driven by the transmission motor, and the transmission motor moves upward with the test slide and the sample to be tested under the action of the structure. During the movement, the corresponding stretching component carries out tensile strength test on the sample to be tested. If the sample to be tested meets the standard in the tensile test, the test slide and the sample to be tested can continue to rise, and the corresponding extrusion component can carry out extrusion strength test on the sample to be tested.

[0006] The first aspect of the present disclosure provides a strength test equipment for MPP cable protection pipe production, which specifically comprises: a test body, guide grooves are formed at the left and right ends of the front side of the test body; transmission grooves are further formed at the left and right sides of the interior of the guide grooves; the transmission grooves are composed of an inclined groove and a vertical groove; a transmission column of a cylindrical structure is slidably installed in the interior of the transmission groove; two stretching grooves are symmetrically arranged at the front side of the test body; the stretching grooves are composed of two inclined grooves and three vertical grooves; a stretching guide rail is fixedly installed at the front side of the test body; a connecting piece is fixedly installed at the top of the front side of the stretching guide rail; an extrusion test piece is fixedly installed at the front end of the connecting piece; a transmission screw is rotatably installed at the bottom of the test body; a transmission motor is fixedly installed at the top end of the stretching guide rail; the output shaft of the transmission motor is connected with the top end of the transmission screw; a test sliding seat is slidably installed on the stretching guide rail.

[0007] In at least some embodiments, the test sliding seat is connected with the transmission screw through a thread; a limiting support is fixedly installed at the front side of the test sliding seat; a to-be-tested protection pipe sample is placed in the interior of the limiting support; the to-be-tested protection pipe sample is located below the extrusion test piece; a guide rod is fixedly installed at the left and right sides of the test sliding seat; a limiting disc of a disc structure is fixedly installed at the outer end of the guide rod; a stretching sliding seat is sleeved and slidably installed on the guide rod; a stretching sliding column of a cylindrical structure is fixedly installed at the rear end of the stretching sliding seat.

[0008] In at least some embodiments, the stretching sliding column is further slidably installed in the interior of the stretching groove; one end of a restoring spring A is embeddedly installed at the top of the outer side of the stretching sliding seat; the other end of the restoring spring A is embeddedly installed at the inner side of the limiting disc; an embedded plate A is further fixedly installed at the outer side of the stretching sliding seat; a clamping seat is fixedly installed at the front end of the stretching sliding seat; a clamping groove is formed at the inner side of the clamping seat; a clamping piece is slidably installed in the interior of the clamping groove; an arc-shaped friction groove is formed at the inner end of the clamping piece.

[0009] In at least some embodiments, one end of a restoring spring B is embeddedly installed at the inner side of the clamping piece; the other end of the restoring spring B is embeddedly installed on the inner side wall of the clamping groove; a driven column of a cylindrical structure is fixedly installed at the outer end of the clamping piece; a transmission shaft is rotatably installed at the central position of the outer side of the clamping seat; a transmission gear is fixedly installed at the outer end of the transmission shaft; a transmission disc of a disc structure is fixedly installed on the circumferential outer wall of the transmission shaft; a tension groove of an arc structure is formed at the outer side of the transmission disc; the driven column is further slidably installed in the interior of the tension groove.

[0010] In at least some embodiments, the inside outer side of the stretching sliding seat is slidingly installed with a conversion sliding seat; the inside front end of the conversion sliding seat is fixedly installed with a conversion rack; the conversion rack is connected in meshing engagement with a transmission gear; the rear end of the conversion sliding seat is fixedly installed with a connecting plate; the connecting plate is also slidingly connected with a transmission column; the outside of the conversion sliding seat is fixedly installed with an embedded plate B; one end of a restoring spring C is embeddedly installed on the front side of the embedded plate B; the other end of the restoring spring C is embeddedly installed on the rear side wall of the embedded plate A.

[0011] The application provides a strength test equipment for MPP cable protection pipe production, which has the following beneficial effects:

[0012] (1) The application only needs a transmission motor to control the test sliding seat and the rising of the to-be-tested protection pipe sample. During the rising process, the corresponding stretching component in the test equipment will preferentially perform a stretching strength test on the to-be-tested protection pipe sample. If the to-be-tested protection pipe sample obtains a qualified result in the stretching test, the test sliding seat continues to rise to complete the extrusion strength test on the to-be-tested protection pipe sample. In this way, the two strength tests are combined together to complete, directly reducing one test step compared with the traditional strength test equipment and improving the test efficiency of the strength test equipment.

[0013] (2) When the test sliding seat rises to preliminarily complete the stretching test on the to-be-tested protection pipe sample, the conversion sliding seat and the transmission column will indirectly control the two clamping pieces to move relatively inward along the clamping groove under the cooperation of the transmission groove, so that the clamping pieces clamping and fixing the two ends of the to-be-tested protection pipe sample in advance when the stretching sliding column slides into the inclined groove part of the stretching groove. In this way, only the to-be-tested protection pipe sample needs to be placed and the transmission motor needs to be started during the test, so that the test equipment does not have a long clamping work before the test, and the test efficiency of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0015] The drawings described in the following description only relate to some embodiments of the application, rather than limiting the application.

[0016] In the drawings:

[0017] Figure 1 a schematic view showing the overall structure of the application is shown;

[0018] Figure 2 a schematic view showing the overall split state structure of the application is shown;

[0019] Figure 3The structure schematic diagram of the stretching guide rail removal state of the application is shown.

[0020] Figure 4 The structure schematic diagram of the test slide of the application is shown.

[0021] Figure 5 The structure schematic diagram of the stretching slide and the conversion slide of the application is shown. Figure 4 The structure schematic diagram of another view of the application is shown.

[0022] Figure 6 The structure schematic diagram of the test slide in the disassembled state of the application is shown.

[0023] Figure 7 The structure schematic diagram of the stretching slide and the conversion slide of the application is shown.

[0024] Figure 8 The structure schematic diagram of the stretching slide and the clamping piece of the application is shown.

[0025] List of reference signs

[0026] 1, test machine body; 2, guide groove; 3, transmission groove; 4, transmission column; 5, stretching groove; 6, stretching guide rail; 7, connecting piece; 8, extrusion test piece; 9, transmission screw; 10, transmission motor;

[0027] 11, test slide; 12, limiting support; 13, to-be-tested protective tube sample; 14, guide rod; 15, limiting disc; 16, stretching slide; 17, stretching slide column; 18, recovery spring A; 19, embedded plate A; 20, clamping seat;

[0028] 21, clamping groove; 22, clamping piece; 23, recovery spring B; 24, driven column; 25, transmission shaft; 26, transmission gear; 27, transmission disc; 28, tension groove; 29, conversion slide; 30, conversion rack; 31, connecting plate; 32, embedded plate B; 33, recovery spring C. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0030] Please refer to Figures 1 to 8 :

[0031] Embodiment one:

[0032] The application provides a strength test equipment for MPP cable protection pipe production, which comprises a test body 1, guide grooves 2 are formed in the left and right ends of the front side of the test body 1, transmission grooves 3 are further formed in the left and right sides of the inside of the guide grooves 2, the transmission grooves 3 are composed of an inclined groove and a vertical groove, a transmission column 4 in a cylindrical structure is slidably installed in the inside of the transmission groove 3, two stretching grooves 5 are symmetrically arranged in the front side of the test body 1, the stretching grooves 5 are composed of two inclined grooves and three vertical grooves, a stretching guide rail 6 is fixedly installed on the front side of the test body 1, a connecting piece 7 is fixedly installed on the top of the front side 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 lead screw 9 is rotatably installed on the bottom of the test body 1, a transmission motor 10 is fixedly installed on the top end of the stretching guide rail 6, the output shaft of the transmission motor 10 is connected with the top end of the transmission lead screw 9, and a test sliding seat 11 is slidably installed on the stretching guide rail 6.

[0033] The application has the advantages that the test protection pipe sample 13 is placed on the limiting support 12, and the two ends of the test protection pipe sample 13 are resisted on the inside of the clamping seat 20, then the transmission motor 10 is started to drive the transmission lead screw 9 to rotate, the transmission lead screw 9 drives the test sliding seat 11 and the test protection pipe sample 13 placed on the limiting support 12 to move upwards, when moving, the transmission column 4 slides from the inclined groove part of the transmission groove 3 into the vertical groove part, the transmission column 4 drives the connecting plate 31, the conversion sliding seat 29 and the conversion rack 30 to move forward in priority, the conversion rack 30 is driven to rotate by moving forward and cooperating with the transmission gear 26, the transmission disc 27 is driven to rotate and utilizes the arc structure of the tension groove 28 to drive the driven column 24 and the clamping piece 22 to move inward along the clamping groove 21, the clamping piece 22 is driven to move inward to clamp the two ends of the test protection pipe sample 13, and the clamping and positioning of the test protection pipe sample 13 are completed, so that the stretching strength test on the test protection pipe sample 13 can be conveniently carried out.

[0034] In example two, on the basis of example one, the test sliding seat 11 is connected with the transmission screw rod 9 through a thread; the front side of the test sliding seat 11 is fixedly installed with a limiting support 12; the inside of the limiting support 12 is placed with a to-be-tested protective pipe sample 13; the to-be-tested protective pipe sample 13 is located below the extrusion test piece 8; the left and right sides of the test sliding seat 11 are fixedly installed with guide rods 14; the outer end of the guide rod 14 is fixedly installed with a limiting disc 15 of a disc structure; a stretching sliding seat 16 is sleeved and slidably installed on the guide rod 14; the rear end of the stretching sliding seat 16 is fixedly installed with a stretching sliding column 17 of a cylindrical structure; the stretching sliding column 17 is also slidably installed in the inside of the stretching slot 5; one end of a recovery spring A 18 is embeddedly installed on the outside top of the stretching sliding seat 16; the other end of the recovery spring A 18 is embeddedly installed in the inside of the limiting disc 15; the outside of the stretching sliding seat 16 is also fixedly installed with an embedded plate A 19; the front end of the stretching sliding seat 16 is fixedly installed with a clamping seat 20; the inside of the clamping seat 20 is provided with a clamping slot 21; the inside of the clamping slot 21 is slidably installed with a clamping piece 22; the inner end of the clamping piece 22 is provided with an arc-shaped friction slot;

[0035] By moving the test sliding seat 11 upwards, at this time, the stretching sliding column 17 will slide from the vertical slot below the stretching slot 5 into the inclined slot below, so that the stretching sliding column 17 moves outward along the guide rod 14 with the stretching sliding seat 16 by means of the inclined slot, and in the moving process, the stretching sliding seat 16 will move outward synchronously with the clamping seat 20 and the conversion sliding seat 29, so that the clamping seat 20 pulls the two ends of the to-be-tested protective pipe sample 13 by moving outward, and the to-be-tested protective pipe sample 13 is subjected to a stretching strength test, if the to-be-tested protective pipe sample 13 is damaged in the stretching strength test step, it indicates that the quality of the batch of MPP cable protective pipes does not meet the standard, if the to-be-tested protective pipe sample 13 does not appear to be broken in the stretching step, it indicates that the tensile strength of the to-be-tested protective pipe sample 13 meets the standard.

[0036] The embodiment three, on the basis of the embodiment two, the inner side of the clamping piece 22 is embedded with one end of the restoring spring B23; the other end of the restoring spring B23 is embedded on the inner side wall of the clamping groove 21; the outer end of the clamping piece 22 is fixedly installed with the driven column 24 of the cylindrical structure; the outer side of the clamping seat 20 is rotatably installed with the transmission shaft 25 at the central position; the outer end of the transmission shaft 25 is fixedly installed with the transmission gear 26; the circumferential outer wall of the transmission shaft 25 is fixedly installed with the transmission disc 27 of the disc structure; the outer side of the transmission disc 27 is provided with the tension slot 28 of the arc structure; the driven column 24 is also slidably installed in the inner side of the tension slot 28; the inner side of the stretching sliding seat 16 is slidably installed with the conversion sliding seat 29; the inner front end of the conversion sliding seat 29 is fixedly installed with the conversion rack 30; the conversion rack 30 is connected with the transmission gear 26 in meshing mode; the rear end of the conversion sliding seat 29 is fixedly installed with the connecting plate 31; the connecting plate 31 is also slidably connected with the transmission column 4; the outer side of the conversion sliding seat 29 is fixedly installed with the embedded plate B32; one end of the restoring spring C33 is embedded on the front side of the embedded plate B32; the other end of the restoring spring C33 is embedded on the rear side wall of the embedded plate A19.

[0037] Through the upward movement of the test sliding seat 11, the stretching sliding column 17 enters into the vertical slot in the middle of the stretching slot 5, the upper inclined slot and the upper vertical slot in sequence through the upward movement, so that the stretching of the to-be-tested protective pipe sample 13 is cancelled through the step of the stretching sliding column 17, and then when the test sliding seat 11 continues to move upward, the test piece 8 contacts the to-be-tested protective pipe sample 13, and the to-be-tested protective pipe sample 13 is subjected to the extrusion type strength test; if the to-be-tested protective pipe sample 13 is damaged, it indicates that the quality of the batch of MPP cable protective pipes needs to be improved; if the to-be-tested protective pipe sample 13 still does not appear to be damaged, it indicates that the extrusion strength of the to-be-tested protective pipe sample 13 meets the standard, and it proves that the batch of MPP cable protective pipes has high quality.

[0038] Working principle:

[0039] When testing, first place the sample 13 to be tested on the limiting support 12, and have the two ends of the sample 13 to be tested abut against the inner side of the clamping seat 20, then start the transmission motor 10 to rotate the transmission motor 10 with the transmission screw rod 9, and make the transmission screw rod 9 rotate with the test slide 11 and the sample 13 to be tested placed on the limiting support 12 to move upwards, 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 drives the connecting plate 31, the conversion slide 29 and the conversion rack 30 to move forward in priority, so that the conversion rack 30 rotates with the transmission shaft 25 and the transmission disc 27 by moving forward and cooperating with the transmission gear 26, so that the transmission disc 27 rotates and uses the arc structure of the tension groove 28 to pull the driven column 24 and the clamping piece 22 inward along the clamping groove 21, so that the clamping piece 22 is clamped by moving inward to clamp the two ends of the sample 13 to be tested, and the clamping and positioning of the sample 13 to be tested is completed, then continue to move the test slide 11 upwards, at this time the stretching slide column 17 will slide from the vertical groove below the stretching groove 5 into the inclined groove below, so that the stretching slide column 17 moves outward along the guide rod 14 by using the inclined groove, and the stretching slide 16 moves outward synchronously with the clamping seat 20 and the conversion slide 29 during the movement, so that the clamping seat 20 pulls the two ends of the sample 13 to be tested by moving outward, and the sample 13 to be tested is subjected to a tensile strength test, if the sample 13 to be tested is damaged during the tensile strength test, it indicates that the quality of the batch of MPP cable protection pipes does not meet the standard, if the sample 13 to be tested is not broken during the stretching step, it indicates that the tensile strength of the sample 13 to be tested meets the standard, then continue to move the test slide 11 upwards, so that the stretching slide column 17 moves upwards in turn into the vertical groove in the middle of the stretching groove 5, the inclined groove above and the vertical groove above, so that the stretching slide column 17 cancels the stretching of the sample 13 to be tested, and then when the test slide 11 continues to move upwards, the extrusion test piece 8 will contact the sample 13 to be tested, and the sample 13 to be tested is subjected to an extrusion strength test, if the sample 13 to be tested is damaged, it indicates that the quality of the batch of MPP cable protection pipes needs to be improved, if the sample 13 to be tested is still not broken, it indicates that the extrusion strength of the sample 13 to be tested meets the standard, and it proves that the batch of MPP cable protection pipes has high quality.

[0040] In this article, the following points need to be noted:

[0041] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the usual design.

[0042] 2. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0043] The above merely provides the specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A working method of a cable protection pipe use intensity test apparatus, characterized by: The specific working method is as follows: 1): during the test, first, place the to-be-tested protective tube sample (13) on the limiting support (12), and make the two ends of the to-be-tested protective tube sample (13) abut against the inner side of the clamping seat (20); 2): then, start the transmission motor (10), so that the transmission motor (10) rotates with the transmission screw rod (9), the transmission screw rod (9) moves upward with the test sliding seat (11) and the to-be-tested protective tube sample (13) placed on the limiting support (12), when moving, the transmission column (4) slides into the vertical groove part from the inclined groove part of the transmission groove (3), so that the transmission column (4) preferentially drives the connecting plate (31), the conversion sliding seat (29) and the conversion rack (30) to move forward, so that the conversion rack (30) rotates with the transmission shaft (25) and the transmission disc (27) by cooperating with the transmission gear (26) to move forward, so that the transmission disc (27) rotates and utilizes the arc structure of the tension groove (28) to pull the driven column (24) and the clamping part (22) inward along the clamping groove (21), so that the clamping part (22) is clamped by moving inward to clamp the two ends of the to-be-tested protective tube sample (13), thereby completing the clamping and positioning of the to-be-tested protective tube sample (13); 3): then, continue to move the test sliding seat (11) upward, at this time, the stretching sliding column (17) slides into the inclined groove below from the vertical groove below the stretching groove (5), so that the stretching sliding column (17) moves outward along the guide rod (14) by utilizing the inclined groove with the stretching sliding seat (16), in the moving process, the stretching sliding seat (16) moves outward synchronously with the clamping seat (20) and the conversion sliding seat (29), so that the clamping seat (20) pulls the two ends of the to-be-tested protective tube sample (13) by moving outward, and the to-be-tested protective tube sample (13) is subjected to the stretching strength test, if the to-be-tested protective tube sample (13) is damaged in the stretching strength test step, it indicates that the quality of the cable protective tube does not meet the standard, if the to-be-tested protective tube sample (13) does not break in the stretching step, it indicates that the stretching strength of the to-be-tested protective tube sample (13) meets the standard; 4): then, continue to move the test sliding seat (11) upward, so that the stretching sliding column (17) moves upward into the vertical groove in the middle of the stretching groove (5), the inclined groove above and the vertical groove above in turn, so as to cancel the stretching of the to-be-tested protective tube sample (13) through this step of the stretching sliding column (17); 5): when the test sliding seat (11) continues to move upward, the extrusion test piece (8) contacts the to-be-tested protective tube sample (13), and the to-be-tested protective tube sample (13) is subjected to the extrusion strength test, if the to-be-tested protective tube sample (13) is damaged, it indicates that the quality of the batch of cable protective tubes needs to be improved, if the to-be-tested protective tube sample (13) still does not break, it indicates that the extrusion strength of the to-be-tested protective tube sample (13) meets the standard, and it proves that the batch of cable protective tubes has high quality.

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