A wear resistance and flexure test device and test method for outer coating of rubber hose

Abstract

The present invention discloses a rubber hose outer coating wear and bending test device, comprising a rubber hose to be tested and a hydraulic drive device, and also comprising a test bench, a sliding bracket and a rubber hose bending radius adjustment device, wherein an oil cylinder is fixedly arranged at the middle position at the bottom of the test bench, the hydraulic drive device is hydraulically driven and connected to the oil cylinder, the top of the oil cylinder piston rod is fixedly connected to the sliding bracket, the sliding bracket is provided with a friction rod and a rubber hose rear section fixing rod, the test bench is fixedly provided with a rubber hose front section fixing rod, after the rubber hose to be tested is bent, its front section and rear section are respectively fixed on the rubber hose front section fixing rod and the rubber hose rear section fixing rod, and a counterweight is suspended at the head end of the rubber hose to be tested. The present invention is suitable for dynamic simulation wear resistance test and bending test of rubber hoses, and realizes the function of simultaneously performing friction test and bending test on rubber hoses of multiple specifications and multiple quantities to be tested, thereby greatly improving the test efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber hose testing, and in particular relates to a rubber hose outer coating wear resistance and bending test device and a test method. Background Art

[0002] Wear resistance and bending resistance are two important performance indicators of rubber hoses, which directly affect the service life of rubber hoses. In order to ensure the quality of rubber hoses, it is necessary to test the wear resistance and bending resistance of the outer layer of the rubber hose. In the prior art, the wear resistance and bending resistance tests of the outer layer of the rubber hose are respectively carried out on the hose friction test equipment and the hose flexure test equipment, and only one rubber hose can be tested at a time, which seriously affects the test efficiency. Therefore, how to improve the test efficiency of the wear resistance and bending resistance of rubber hoses is still a problem that technicians in this field need to solve. Summary of the invention

[0003] The present invention aims to provide a rubber hose outer coating wear resistance and flexure test device and test method, which can simultaneously perform friction tests and flexure tests on multiple rubber hoses of various specifications to improve the test efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A rubber hose outer coating wear resistance and flexure test device, comprising a rubber hose to be tested and a hydraulic drive device, a test bench, a sliding bracket and a rubber hose bending radius adjustment device, wherein an oil cylinder is fixedly arranged at the middle position at the bottom of the test bench, the hydraulic drive device is hydraulically driven and connected to the oil cylinder, the top of the oil cylinder piston rod is fixedly connected to the sliding bracket, the sliding bracket is provided with a friction rod and a rubber hose rear section fixing rod, the test bench is fixedly provided with a rubber hose front section fixing rod, and the front section and rear section of the rubber hose to be tested are respectively adjusted after bending. Fixed on the fixing rod of the front section of the hose and the fixing rod of the rear section of the hose, a counterweight block is suspended at the head end of the hose to be tested, and the front section of the hose to be tested contacts the friction rod under the gravity of the counterweight block. The sliding bracket moves up and down within a certain range in the vertical direction in the test bench under the action of the oil cylinder and drives the friction rod to rub the hose to be tested up and down and push and pull the hose to be tested to change the bending part of the hose to be tested. The hose bending radius adjustment device is arranged above the sliding bracket and is used to adjust the bending radius of hoses to be tested of different specifications.

[0006] Furthermore, the sliding bracket includes a longitudinal connecting rod, a transverse connecting rod, a friction rod and a hose rear section fixing rod, the hose rear section fixing rod includes a first hose rear section fixing rod and a second hose rear section fixing rod, the longitudinal connecting rod and the transverse connecting rod are fixedly connected in a T shape, the longitudinal connecting rod is fixedly connected to the top of the cylinder piston rod through a mounting hole opened in the middle, a sliding sleeve is fixedly arranged at the tail of the longitudinal connecting rod, sliding sleeves are fixedly arranged at both ends of the transverse connecting rod, the friction rod is fixedly connected to the transverse connecting rod, the first hose rear section fixing rod and the second hose rear section fixing rod are parallel to and perpendicular to the longitudinal connecting rod and are fixedly connected to the longitudinal connecting rod, the first hose rear section fixing rod is located between the transverse connecting rod and the second hose rear section fixing rod, a first rear pipe clamp group is fixedly arranged on the first hose rear section fixing rod, the first rear pipe clamp group includes several pipe clamps of different specifications, a second rear pipe clamp group is fixedly arranged on the second hose rear section fixing rod, the second rear pipe clamp group includes pipe clamps of the same number, specifications and position relationship as the first rear pipe clamp group.

[0007] Furthermore, the longitudinal connecting rod is provided with several groups of positioning holes, and angle irons are fixedly arranged in the middle of the first hose rear section fixing rod and the second hose rear section fixing rod. The first hose rear section fixing rod and the second hose rear section fixing rod are fixedly installed on the longitudinal connecting rod by bolts passing through the angle irons and the positioning holes.

[0008] Furthermore, sliding rods are fixedly provided on the left side, the right side and the rear side of the test bench, and the sliding sleeves in the sliding brackets are matched and sleeved on the sliding rods, so that the sliding brackets are slidably connected to the sliding rods.

[0009] Furthermore, the front section fixing rod of the hose is located obliquely above the friction rod and its two ends are respectively fixedly connected to the left and right sides of the test bench. A front pipe clamp group is fixedly arranged on the front section fixing rod of the hose, and the front pipe clamp group includes pipe clamps of the same number, specification and position relationship as the first rear pipe clamp group.

[0010] Furthermore, the hose bending radius adjustment device includes a square steel pipe and an adjusting rod. The square steel pipe is fixedly arranged on the left and right sides of the test bench and is located above the sliding bracket. The square steel pipe is provided with a sliding groove. The two ends of the adjusting rod pass through the adjusting rod through a pin shaft and are inserted into the sliding groove to be slidably connected with the square steel pipe.

[0011] The present invention also provides a method for testing the wear resistance and flexure of the outer coating of a rubber hose, comprising the following steps:

[0012] 1) Cut off several hose samples to be tested. The sample length is determined according to the hose specifications and number of layers;

[0013] 2) Install the hose to be tested into the hose clamps that match the hose model in the front hose clamp group, lightly tighten the hose clamp screws, and make the front section of the hose to be tested move in the hose clamp without the hose clamp falling off;

[0014] 3) Select the rear pipe clamp according to the bending radius of the hose to be tested. For hoses with smaller bending radius, select the pipe clamp in the first rear pipe clamp group; for hoses with larger bending radius, select the pipe clamp in the second rear pipe clamp group. Bend the hose to be tested and install it into the pipe clamp that matches the hose model. Slightly tighten the screws to ensure that the rear section of the hose to be tested can be pulled in the pipe clamp without falling off.

[0015] 4) Pull the front section of the hose to be tested and adjust the distance between the head end of the hose to be tested and the bottom of the test bench to 20-25cm. After adjustment, tighten the corresponding pipe clamp screws in the front pipe clamp group to fix the front section of the hose to be tested on the front section fixing rod of the hose;

[0016] 5) Clamp the hose to be tested with two adjusting rods and move them forward and backward, while pulling the rear section of the hose to be tested to adjust the bending radius of the hose to be tested. Measure the bending radius during the adjustment process. After meeting the requirements, fix the adjusting rods and tighten the corresponding pipe clamp screws in the rear pipe clamp group to fix the rear section of the hose to be tested on the fixing rod of the rear section of the hose;

[0017] 6) Suspend a counterweight at the head end of the hose to be tested so that the front end of the hose to be tested is close to the friction rod under the gravity of the counterweight;

[0018] 7) Enter the number of tests required on the control panel of the hydraulic drive device;

[0019] 8) Start the hydraulic drive device, the oil cylinder starts to work and drives the sliding bracket to move up and down reciprocatingly, the friction rod continuously rubs the front section of the hose to be tested up and down to perform the friction test, and at the same time, the fixed rod of the rear section of the hose continuously pushes and pulls the rear section of the hose to be tested to change the bending part of the hose to be tested to perform the flexural test;

[0020] 9) During the test, observe the hose to be tested once every 4 hours, observe whether there is any steel wire leakage at the friction position, and observe whether there is any cracking at the bending position. When a hose leaks steel wire or cracks, it can be judged as unqualified, and the equipment is suspended, the number of friction times is recorded, the hose is removed, and the test of other hoses is continued; after the test, if the hose to be tested does not leak steel wire or crack, it can be judged as qualified.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention is suitable for dynamic simulation wear resistance test and bending test of rubber hose, and is provided with a test bench and a sliding bracket, the test bench is provided with a front section fixing rod of the rubber hose, the sliding bracket is provided with a rear section fixing rod of the rubber hose and a friction rod, the front sections of a plurality of rubber hoses to be tested with different specifications are fixed on the front section fixing rod of the rubber hose and lean against the friction rod, the rear sections are fixed on the rear section fixing rod of the rubber hose, the oil cylinder drives the sliding bracket and the rear section fixing rod of the rubber hose and the friction rod to move up and down, so that the friction rod continuously rubs the front section of the rubber hose to be tested, and at the same time the bending part of the rubber hose to be tested continuously changes, so that the function of simultaneously performing friction test and bending test on rubber hoses with multiple specifications and a large number of them to be tested is realized, and the test efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 is a schematic diagram of the sliding bracket structure;

[0025] Figure 3 for Figure 1 A partial enlarged view of the middle part;

[0026] The markings in the attached drawings are: 1-hose to be tested, 2-test bench, 3-sliding bracket, 4-longitudinal connecting rod, 401-mounting hole, 402-positioning hole, 5-transverse connecting rod, 6-friction rod, 7-first hose rear section fixing rod, 8-second hose rear section fixing rod, 9-sleeve, 10-angle iron, 11-first rear pipe clamp group, 12-second rear pipe clamp group, 13-oil cylinder, 14-sliding rod, 15-hose front section fixing rod, 16-front pipe clamp group, 17-square steel pipe, 1701-slide groove, 18-adjusting rod, 19-pin shaft, 20-counterweight block. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] See also Figure 1-Figure 3 , an embodiment provided by the present invention:

[0029] A rubber hose outer coating wear resistance and bending test device, comprising a rubber hose to be tested 1, a hydraulic drive device, a test bench 2, a sliding bracket 3 and a rubber hose bending radius adjustment device, a cylinder 13 is fixedly installed at the middle position of the bottom of the test bench 2, the hydraulic drive device is hydraulically driven and connected to the cylinder 13, the top of the piston rod of the cylinder 13 is fixedly connected to the sliding bracket 3, the sliding bracket 3 is provided with a friction rod 6 and a rubber hose rear section fixing rod, the test bench 2 is fixedly provided with a rubber hose front section fixing rod 15, and after the rubber hose to be tested 1 is bent, its front section and rear section are respectively fixed on the rubber hose 1. A counterweight block 20 is suspended at the head end of the hose 1 to be tested on the fixing rod 15 of the front section of the pipe and the fixing rod of the rear section of the hose. The front section of the hose 1 to be tested contacts the friction rod 6 under the gravity of the counterweight block 20. The sliding bracket 3 moves up and down within a certain range in the vertical direction in the test bench 2 under the action of the oil cylinder 13 and drives the friction rod 6 to rub the hose 1 to be tested up and down and push and pull the hose 1 to be tested to change the bending part of the hose 1 to be tested. The hose bending radius adjustment device is arranged above the sliding bracket 3, which is used to adjust the bending radius of the hoses 1 to be tested of different specifications.

[0030] Among them, the sliding bracket 3 includes a longitudinal connecting rod 4, a transverse connecting rod 5, a friction rod 6 and a rear hose fixing rod, the rear hose fixing rod includes a first rear hose fixing rod 7 and a second rear hose fixing rod 8, the longitudinal connecting rod 4 and the transverse connecting rod 5 are T-shaped and fixedly connected by bolts, the longitudinal connecting rod 4 is fixedly connected to the top of the piston rod of the oil cylinder 13 through a mounting hole 401 opened in the middle, the tail of the longitudinal connecting rod 4 is fixedly provided with a sliding sleeve 9 by bolts, the two ends of the transverse connecting rod 5 are fixedly provided with sliding sleeves 9 by bolts, the friction rod 6 and the transverse connecting rod 5 are fixedly connected by bolts, the first rear hose fixing rod 7 and the second rear hose fixing rod 8 are parallel to each other and perpendicular to the longitudinal connecting rod 4 and fixedly connected to the longitudinal connecting rod 4, The first hose rear section fixing rod 7 is located between the cross-link rod 5 and the second hose rear section fixing rod 8. A first rear pipe clamp group 11 is fixedly arranged on the first hose rear section fixing rod 7. The first rear pipe clamp group 11 includes 6 pipe clamps of different specifications. A second rear pipe clamp group 12 is fixedly arranged on the second hose rear section fixing rod 8. The second rear pipe clamp group 12 includes pipe clamps of the same number, specification and position relationship as the first rear pipe clamp group 11. The first rear pipe clamp group 11 is used to clamp and fix the rear section of the hose 1 to be tested with a smaller bending radius and an outer diameter range of 6-42 mm. The second rear pipe clamp group 12 is used to clamp and fix the rear section of the hose 1 to be tested with a larger bending radius and an outer diameter range of 6-42 mm.

[0031] Among them, the longitudinal connecting rod 4 is provided with 12 groups of positioning holes 402, and angle irons 10 are fixedly arranged in the middle of the first hose rear section fixing rod 7 and the second hose rear section fixing rod 8. The first hose rear section fixing rod 7 and the second hose rear section fixing rod 8 are fixedly installed on the longitudinal connecting rod 4 by bolts passing through the angle irons 10 and the positioning holes 402. The positioning holes 402 are used to adjust the front and rear positions of the first hose rear section fixing rod 7 and the second hose rear section fixing rod 8 on the longitudinal connecting rod 4, so that the bending radius of all the hoses 1 to be tested is within the comprehensive balance range when they are bent.

[0032] Among them, sliding rods 14 are fixedly installed on the left side, right side and rear side of the test bench 2, and the sliding sleeve 9 in the sliding bracket 3 is matched and sleeved on the sliding rod 14, so that the sliding bracket 3 is slidingly connected to the sliding rod 14. Under the action of the cylinder 13, the sliding bracket 3 moves up and down within the length range of the sliding rod 14.

[0033] Among them, the front section fixing rod 15 of the hose is located obliquely above the friction rod 6 and its two ends are fixedly connected to the left and right sides of the test bench 2 respectively. A front pipe clamp group 16 is fixedly arranged on the front section fixing rod 15 of the hose. The front pipe clamp group 16 includes pipe clamps with the same number, specifications and position relationship as the first rear pipe clamp group 11, and is used to clamp and fix the front section of the hose 1 to be tested with an outer diameter range of 6-42mm.

[0034] Among them, the hose bending radius adjustment device includes a square steel tube 17 and an adjustment rod 18. The square steel tube 17 is fixedly arranged on the left and right sides of the test bench 2 and is located above the sliding bracket 3. The square steel tube 17 is provided with a slide groove 1701. The two ends of the adjustment rod 18 pass through the adjustment rod 18 through a pin shaft 19 and are inserted into the slide groove 1701 to be slidably connected with the square steel tube 17. The two adjustment rods 18 clamp the hose 1 to be tested and move it back and forth, so as to further adjust the bending radius of the hose 1 to be tested.

[0035] A method for testing the wear resistance and flexure of the outer covering of a rubber hose comprises the following steps:

[0036] 1) Cut off several hose samples to be tested. The sample length is determined according to the hose specifications and the number of layers; see Table 1 for details:

[0037] Table 1

[0038] 2) Install the hose 1 to be tested into the pipe clamps matching the hose model in the front pipe clamp group 16, lightly tighten the pipe clamp screws, and make the front section of the hose 1 to be tested move in the pipe clamp without the pipe clamp falling off;

[0039] 3) Select the rear pipe clamp according to the bending radius of the hose 1 to be tested. For hoses with a smaller bending radius, select the pipe clamp in the first rear pipe clamp group 11, and for hoses with a larger bending radius, select the pipe clamp in the second rear pipe clamp group 12. Bend the hose 1 to be tested and install it into the pipe clamp that matches the hose model. Slightly tighten the screws to ensure that the rear section of the hose 1 to be tested can be pulled in the pipe clamp without falling off.

[0040] 4) Pull the front section of the hose 1 to be tested and adjust the distance between the head end of the hose 1 to be tested and the bottom of the test bench 2 to 20-25 cm. After adjustment, tighten the corresponding pipe clamp screws in the front pipe clamp group 16 to fix the front section of the hose 1 to be tested on the hose front section fixing rod 15;

[0041] 5) Clamp the two adjustment rods 18 to the hose 1 to be tested and move them forward and backward, and at the same time pull the rear section of the hose 1 to be tested to adjust the bending radius of the hose 1 to be tested. Measure the bending radius during the adjustment process. After it meets the requirements (usually the minimum bending radius), fix the adjustment rods 18 and lock the corresponding pipe clamp screws in the rear pipe clamp group to fix the rear section of the hose 1 to be tested on the hose rear section fixing rod;

[0042] 6) Suspend a counterweight 20 at the head end of the hose 1 to be tested, so that the front section of the hose 1 to be tested is close to the friction rod 6 under the gravity of the counterweight 20; the corresponding relationship between the weight of the counterweight 20 and the hose specifications is shown in Table 2:

[0043]

[0044] Table 2

[0045] 7) Enter the number of times to be tested on the control panel of the hydraulic drive device (the number of tests depends on customer requirements, and in this embodiment it is 1,170,000 times);

[0046] 8) Start the hydraulic drive device, the oil cylinder 13 starts to work and drives the sliding bracket 3 to move up and down reciprocatingly, the friction rod 6 continuously rubs the front section of the hose 1 to be tested up and down to perform a friction test, and at the same time, the fixed rod of the rear section of the hose continuously pushes and pulls the rear section of the hose 1 to be tested to change the bending part of the hose 1 to be tested to perform a flexural test;

[0047] 9) During the test, observe the hose 1 to be tested once every 4 hours, observe whether there is any steel wire leakage at the friction position, and observe whether there is any cracking at the bending position. When a hose has steel wire leakage or cracking, it can be judged that the hose is unqualified, and the equipment is suspended, the number of friction times is recorded, the hose is removed, and the test of other hoses is continued; after the test, if the hose 1 to be tested has no steel wire leakage or cracking, it can be judged that the hose 1 to be tested is qualified.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber hose outer coating wear resistance and flexure test device, comprising a rubber hose to be tested (1) and a hydraulic drive device, characterized in that: The test bench (2) also includes a test bench (2), a sliding bracket (3) and a hose bending radius adjustment device. A cylinder (13) is fixedly arranged at the middle position of the bottom of the test bench (2). The hydraulic drive device is hydraulically driven and connected to the cylinder (13). The top of the piston rod of the cylinder (13) is fixedly connected to the sliding bracket (3). The sliding bracket (3) is provided with a friction rod (6) and a hose rear section fixing rod. The test bench (2) is fixedly provided with a hose front section fixing rod (15). After the hose (1) to be tested is bent, its front section and rear section are respectively fixed to the hose front section fixing rod (15) and the hose rear section fixing rod. A counterweight (20) is suspended at the head end of the hose (1) to be tested. The front section of the hose (1) to be tested contacts the friction rod (6) under the action of the gravity of the counterweight (20). The sliding bracket (3) is fixedly arranged with a friction rod (6) under the action of the gravity of the counterweight (20). Under the action of the cylinder (13), the cylinder (13) moves up and down within a certain range in the vertical direction in the test bench (2) and drives the friction rod (6) to rub the hose (1) to be tested up and down and push and pull the hose (1) to be tested so that the bending part of the hose (1) to be tested changes. The hose bending radius adjustment device is arranged above the sliding bracket (3) and is used to adjust the bending radius of the hose (1) to be tested of different specifications. The hose bending radius adjustment device comprises a square steel pipe (17) and a plurality of adjustment rods (18). The square steel pipe (17) is fixedly arranged on the left and right sides of the test bench (2) and is located above the sliding bracket (3). The square steel pipe (17) is provided with a slide groove (1701). The two ends of the adjustment rod (18) pass through the adjustment rod (18) through a pin shaft (19) and are inserted into the slide groove (1701) to be slidably connected with the square steel pipe (17).

2. A rubber hose outer coating wear resistance and flexure test device according to claim 1, characterized in that: The sliding bracket (3) comprises a longitudinal connecting rod (4), a transverse connecting rod (5), a friction rod (6) and a rear hose fixing rod, wherein the rear hose fixing rod comprises a first rear hose fixing rod (7) and a second rear hose fixing rod (8), the longitudinal connecting rod (4) and the transverse connecting rod (5) are fixedly connected in a T-shape, the longitudinal connecting rod (4) is fixedly connected to the top of the piston rod of the oil cylinder (13) via a mounting hole (401) provided in the middle, a sliding sleeve (9) is fixedly provided at the tail of the longitudinal connecting rod (4), sliding sleeves (9) are fixedly provided at both ends of the transverse connecting rod (5), the friction rod (6) is fixedly connected to the transverse connecting rod (5), the first rear hose fixing rod (7) and the second rear hose fixing rod (8) are fixedly connected, The fixing rod (7) and the second hose rear section fixing rod (8) are parallel to each other and perpendicular to the longitudinal connecting rod (4) and are fixedly connected to the longitudinal connecting rod (4); the first hose rear section fixing rod (7) is located between the transverse connecting rod (5) and the second hose rear section fixing rod (8); a first rear pipe clamp group (11) is fixedly arranged on the first hose rear section fixing rod (7); the first rear pipe clamp group (11) includes a plurality of pipe clamps of different specifications; the second hose rear section fixing rod (8) is fixedly arranged on the second hose rear section fixing rod (12); the second rear pipe clamp group (12) includes pipe clamps of the same number, specification and position relationship as the first rear pipe clamp group (11).

3. A rubber hose outer coating wear resistance and flexure test device according to claim 2, characterized in that: The longitudinal connecting rod (4) is provided with a plurality of groups of positioning holes (402); angle irons (10) are fixedly arranged in the middle of the first rubber hose rear section fixing rod (7) and the second rubber hose rear section fixing rod (8); the first rubber hose rear section fixing rod (7) and the second rubber hose rear section fixing rod (8) are fixedly mounted on the longitudinal connecting rod (4) by means of bolts passing through the angle irons (10) and the positioning holes (402).

4. A rubber hose outer layer wear resistance and flexure test device according to claim 2, characterized in that: Sliding rods (14) are fixedly provided on the left side, right side and rear side of the test bench (2), and the sliding sleeves (9) in the sliding bracket (3) are matched and sleeved on the sliding rods (14), so that the sliding bracket (3) and the sliding rods (14) are slidably connected.

5. A rubber hose outer coating wear resistance and flexure test device according to claim 2, characterized in that: The front section fixing rod (15) of the rubber hose is located obliquely above the friction rod (6) and its two ends are respectively fixedly connected to the left and right sides of the test bench (2). A front pipe clamp group (16) is fixedly arranged on the front section fixing rod (15), and the front pipe clamp group (16) includes pipe clamps of the same number, specification and position relationship as the first rear pipe clamp group (11).

6. A method for testing the wear resistance and flexure of the outer coating of a rubber hose, based on the device for testing the wear resistance and flexure of the outer coating of a rubber hose as claimed in claim 5, characterized in that: The steps include: 1) Cut off several samples of the hose to be tested (1). The length of the sample is determined according to the specifications and number of layers of the hose; 2) Install the hose (1) to be tested into the hose clamps of the front hose clamp assembly (16) that match the hose model, and lightly tighten the clamp screws to ensure that the front end of the hose (1) to be tested can be pulled in the clamp without falling off; 3) Select a rear pipe clamp according to the bending radius of the hose (1) to be tested. For hoses with a smaller bending radius, select a pipe clamp from the first rear pipe clamp group (11), and for hoses with a larger bending radius, select a pipe clamp from the second rear pipe clamp group (12). After bending the hose (1) to be tested, install it into a pipe clamp that matches the hose model, lightly tighten the screws, and allow the rear end of the hose (1) to be tested to be able to move in the pipe clamp without falling off. 4) Pull the front section of the hose (1) to be tested and adjust the distance between the head end of the hose (1) to be tested and the bottom of the test bench (2) to be 20-25 cm. After the adjustment is completed, tighten the corresponding pipe clamp screws in the front pipe clamp assembly (16) to fix the front section of the hose (1) to be tested on the hose front section fixing rod (15); 5) Clamp the two adjustment rods (18) to the hose (1) to be tested and move them forward and backward, while pulling the rear section of the hose (1) to be tested to adjust the bending radius of the hose (1) to be tested. During the adjustment process, measure the bending radius. When the bending radius meets the requirements, fix the adjustment rods (18) and tighten the corresponding pipe clamp screws in the rear pipe clamp assembly to fix the rear section of the hose (1) to be tested on the hose rear section fixing rod; 6) Suspending a counterweight (20) at the head end of the rubber hose (1) to be tested, so that the front end of the rubber hose (1) to be tested is close to the friction rod (6) under the action of the gravity of the counterweight (20); 7) Enter the number of tests required on the control panel of the hydraulic drive device; 8) The hydraulic drive device is started, the oil cylinder (13) starts to work and drives the sliding bracket (3) to move up and down reciprocatingly, the friction rod (6) continuously rubs the front section of the hose (1) to be tested up and down to perform a friction test, and at the same time, the fixed rod at the rear section of the hose continuously pushes and pulls the rear section of the hose (1) to be tested so that the bending part of the hose (1) to be tested changes to perform a flexural test; 9) During the test, observe the hose (1) to be tested once every 4 hours. Observe whether there is any steel wire leakage at the friction position and whether there is any cracking at the bending position. If a hose is found to be leaking steel wire or cracking, it can be determined that the hose is unqualified. The equipment is suspended, the number of friction times is recorded, the hose is removed, and the test of other hoses is continued. After the test, if the hose (1) to be tested does not have any steel wire leakage or cracking, it can be determined that the hose (1) to be tested is qualified.

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