Metal hose bending test device

Abstract

The invention provides a metal hose bending test device which solves the problems that an existing hose bending test device is difficult to control the bending angle and radius of a to-be-tested hose and is difficult to detect the bending performance of hoses with different lengths and pipe diameters. According to the technical scheme, a transverse clamp is composed of sliding clamp supporting bases which are symmetrically arranged at the two ends of a transverse rail and driven by an automatic rod pushing device, an electric moving platform of an angle limiting device is provided with a sleeve type push plate through a support, and the sleeve type push plate is formed by assembling a plurality of coaxial cylinders which are enlarged layer by layer from inside to outside; the axial direction of the cylinders is the same as the moving direction of the electric moving platform, electric cylinders used for pushing the multiple sets of cylinders respectively are arranged on the rear portion of the sleeve type push plate, and the electric moving platform is provided with a baffle used for limiting the hose. The flexible pipe bending device can adjust and control the bending radius and angle of a flexible pipe, adapts to detection of flexible pipes with different lengths and pipe diameter specifications, is simple in structure and outstanding in flexible pipe bending test capability, and improves the accuracy of a test result.

Description

Technical Field

[0001] The invention relates to the technical field of hose testing, in particular to a metal hose bending testing device suitable for testing the bending performance of the metal hose. Background Art

[0002] At present, a large number of metal hoses are usually used as pipe or cable protective covers in equipment in cutting-edge fields such as oil production, navigation, and aerospace. The repeated bending safety performance of metal hoses is particularly important. When testing the existing metal hose bending test, it is usually not compatible with hoses of various lengths and calibers to accurately bend into the angle specified in the test, that is, the radius of the bending angle is different. At the same time, it is difficult to always maintain the specified ideal curve during the test process. The commonly used bending device uses a clamp to fix the two side segments of the metal hose in the length direction to perform bending deformation actions. However, the bending radius of metal hoses of different lengths and calibers is different during the test, so it is difficult to meet the specified test requirements. The patent document with announcement number CN110887751A discloses a repeated bending test device for wires and cables, which adopts a cross-shaped base plate, a rectangular block with a top block is sleeved in a rectangular groove, and a pair of U-shaped grooves are formed inside the top block. The wires and cables are tested through two U-shaped limit grooves, and the locking block is used to slide and repeatedly bend the cable to perform bending test. The disadvantages are that the curvature of the U-shaped limit groove of the test cable is fixed, the radius is difficult to adjust, and the angle and radius of the cable bending section cannot be accurately controlled. Therefore, it is difficult to adapt to the detection requirements and cannot be applied to the testing of pipelines of various specifications. Summary of the invention

[0003] The purpose of the present invention is to provide a metal hose bending test device, which solves the problem that the existing hose bending test device is difficult to control the bending angle and radius of the hose to be tested, and is difficult to detect the bending performance of hoses of different lengths and diameters. The device can adjust and control the bending radius and angle of the hose, and is suitable for the detection of hoses of various lengths and diameters.

[0004] The technical solution adopted by the present invention is: the metal hose bending test device includes a cross-shaped cross slide rail and a clamp composed of a transverse track and a longitudinal track, and its technical highlights are: the clamp includes a transverse clamp and an angle limiter, the transverse clamp is a sliding clamp support seat symmetrically arranged at both ends of the transverse track and driven by an automatic push rod, the sliding clamp support seat is provided with a clamping plate for fixing the end of the metal hose; the angle limiter includes an electric movable platform for sliding along the longitudinal track, the electric movable platform is provided with a sleeve-type push plate through a support, the sleeve-type push plate is assembled by multiple groups of coaxial cylinders that increase layer by layer from the inside to the outside, the axial direction of the cylinder is the same as the moving direction of the electric movable platform, the rear part of the sleeve-type push plate is provided with an electric cylinder for pushing the multiple groups of cylinders respectively, and the electric movable platform is provided with a baffle for limiting the hose.

[0005] The two clamping plates of the transverse clamp are provided with a distance sensor for measuring the distance between the two clamping plates.

[0006] A push rod with an arc-shaped front end is arranged at the center of the sleeve-type push plate.

[0007] The bottom of the clamping plate of the transverse clamp is rotatably connected to the sliding clamp supporting seat.

[0008] The advantages and positive effects of the present invention are as follows: since the metal hose bending test device of the present invention adopts a transverse clamp which is a sliding clamp support seat driven by an automatic push rod and symmetrically arranged at both ends of the transverse track, the sliding clamp support seat is provided with a clamping plate for fixing the end of the metal hose, the clamping plate can be used to fix the flange of the end of the metal hose to be tested, so that the pulling force and pushing force on the two ends of the metal hose can be conveniently controlled by the automatic push rod, and the connecting clamping plate can be rotated by the sliding clamp support seat to adapt to the bending and rotation of the metal hose; the angle limiter adopts a sleeve-type push plate set on the electric mobile platform, and can push multiple groups of cylinders separately through the electric cylinder, so that the front ends of the multiple groups of cylinders can be pushed forward respectively, and arc end faces of different radii are formed from the inside to the outside, and then abut against the bent part of the metal hose, so that the metal hose is bent and deformed along with the arc end face, the bending angle and radius of the metal hose are controlled, and the displacement of the bent part of the metal hose is limited by the clamping of the baffle. Therefore, it is possible to conveniently adjust and control the bending radius and angle of the hose, and it is also convenient to test the thrust applied to the metal hose through the automatic push rod and electric cylinder, and it is suitable for testing hoses of various lengths and diameters. It has a simple structure, outstanding hose bending test capabilities, meets the corresponding test requirements, and improves the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described below in conjunction with the accompanying drawings.

[0010] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 yes Figure 1 A top view of Figure 3 It is a structural schematic diagram of the present invention in use state; Figure 4 2 is a schematic diagram of the initial state structure of the angle limiter in the use state of the present invention; Figure 5 This is a schematic diagram of the structure of the angle limiter in a small diameter state when the present invention is in use; Figure 6 It is a schematic diagram of the structure of the angle limiter in the large diameter state when the present invention is in use.

[0011] Explanation of the serial numbers in the figure: 1 longitudinal rail, 2 transverse rail, 3 sliding fixture support seat, 4 automatic push rod device, 5 clamping plate, 6 metal hose, 7 push rod, 8 cylinder, 9 sleeve type push plate, 10 electric cylinder, 11 electric moving platform electric cylinder, 12 support, 13 electric moving platform, 14 baffle, 15 distance sensor. DETAILED DESCRIPTION

[0012] according to Figures 1 to 6 The specific structure of the present invention is described in detail, and the implementation example Figure 1 and Figure 2 As shown, a metal hose bending test device includes a cross-shaped cross slide rail and a fixture composed of a transverse track 2 and a longitudinal track 1. The fixture includes a transverse fixture and an angle limiter. The transverse fixture adopts a sliding fixture support seat 3 driven by an automatic push rod device 4 symmetrically arranged at both ends of the transverse track. The sliding fixture support seat is rotatably provided with a clamping plate 5 for fixing the end of the metal hose 6; the angle limiter includes an electric mobile platform 13 for sliding along the longitudinal track 1. The electric mobile platform is provided with a sleeve push plate 9 through a support 12. The sleeve push plate is assembled by multiple groups of coaxial cylinders 8 that increase layer by layer from the inside to the outside. The axial direction of the cylinder is the same as the moving direction of the electric mobile platform. The rear part of the sleeve push plate is provided with an electric cylinder 10 for pushing the multiple groups of cylinders respectively. The electric cylinder 10 can use multiple electric cylinders to push the multiple groups of cylinders respectively, or a commercially available multi-push rod electric cylinder can be used, so that the multiple push rods are connected to the multiple groups of cylinders respectively, so as to facilitate the control of the axial movement of the cylinders. The electric mobile platform is also provided with a baffle for limiting the position of the hose, which cooperates with the angle limiter to clamp the metal hose 14.

[0013] The automatic push rod device 4 can use a commercially available electric push rod, and the electric mobile platform 13 can also use an electric push rod as the electric mobile platform electric cylinder 11 to control the moving position, which is used to adjust the position set by the angle limiter. A display connected to the automatic push rod device and the electric cylinder can be set to observe the thrust value.

[0014] As a further improvement, the two clamping plates 5 of the transverse clamp are provided with a distance sensor 15 for measuring the distance between the two clamping plates, so as to facilitate the measurement of the length of the metal hose to be measured.

[0015] As a further improvement, a push rod 7 with an arc-shaped front end is arranged at the center of the sleeve-type push plate 9, which can form an arc-shaped surface contact limit with the metal hose, and the conforming effect is better.

[0016] As a further improvement, the bottom of the transverse clamp plate 5 is rotatably connected to the sliding clamp support seat 3. The plate can be set on the sliding clamp support seat by setting a rotating shaft. During the bending test of the metal hose, it can rotate along the bending direction of the metal hose, which is convenient for measurement.

[0017] The metal hose bending test device is used to test the metal hose bending process: Figure 1 and Figure 3 As shown, the hose to be tested is a metal hose, which tends to be a straight line in a free state. This test method is to bend the metal hose of the specimen 90 degrees to test its performance. First, the flanges at both ends of the metal hose 6 of the specimen are respectively connected and fixed to the clamping plates 5 of the transverse clamp. The hose can be straightened to both ends by the automatic push rods 4 at both ends of the transverse clamp. The length of the hose can be measured by the distance sensor 5, and then the thickness of the flanges at both ends of the hose is subtracted to calculate the length of the metal hose. Then, according to the length and diameter of the hose, as well as the bending radius and angle required for the test, the electric movable platform 13 is pushed by the electric movable platform electric cylinder 11 to move the sleeve push plate 9 to the working position, and then the electric cylinder is controlled to push the different layers of cylinders of the sleeve push plate 9 to form arc-shaped front ends of different radii to form the bending radius required for the test, and the baffle is used to limit the position to push the hose to gradually bend and deform to reach the set bending radius and angle. As shown Figure 4 As shown, the front ends of the multiple groups of cylinders in the initial state of the angle limiter are in the same plane, such as Figure 5 As shown, when the length of the metal hose to be tested is short or the diameter is small, the electric cylinder 10 can automatically control the push rod 7 in the center of the sleeve-type push plate 9 and the cylinder with a smaller diameter in the middle to push forward to form a smaller arc-shaped end surface push plate; Figure 6 As shown, when the length of the test piece metal hose is long or the diameter is large, the sleeve-type push plate can be controlled to gradually increase the diameter of the cylinder from the center to the periphery to push forward to form a larger arc-shaped end face push plate. By controlling the angle limiter cylinder to push forward the arc end face, the bending angle and radius of the metal hose can be accurately controlled to meet the test requirements. When the angle limiter pushes the test piece metal hose forward to bend, the automatic push rods at both ends of the transverse fixture are controlled to reduce the pulling force on the test piece metal hose to cooperate with the bending action. The electric cylinder can also be used to set the displacement and force value of the angle limiter to control the bending radius, feed depth, thrust size and other prefabrication of the hose. Manually confirm that the parameters reach the bending angle and complete the test requirements; then control the automatic push rods at both ends of the transverse fixture to pull outward 4 to straighten the hose at both ends, control the multiple groups of cylinders of the angle limiter to gradually return to the initial state, so that the test piece metal hose returns to the straightened state, and completes the test piece metal hose from straightening to bending state, and then returns to the straightened state. In this way, the test piece metal hose is repeatedly cycled to control the movement of the test piece metal hose, and the bending test is carried out to meet the detection requirements.

[0018] In summary, the purpose of the present invention is achieved.

Claims

1. A metal hose bending test device, comprising: A cross-shaped cross slide and clamp composed of a transverse track and a longitudinal track, characterized in that: the clamp includes a transverse clamp and an angle limiter, the transverse clamp is a sliding clamp support seat symmetrically arranged at both ends of the transverse track and driven by an automatic push rod, the sliding clamp support seat is provided with a clamping plate for fixing the end of the metal hose; the angle limiter includes an electric movable platform for sliding along the longitudinal track, the electric movable platform is provided with a sleeve-type push plate through a support, the sleeve-type push plate is assembled from a plurality of groups of coaxial cylinders that increase layer by layer from the inside to the outside, the axial direction of the cylinder is the same as the moving direction of the electric movable platform, the rear part of the sleeve-type push plate is provided with an electric cylinder for pushing the plurality of groups of cylinders respectively, and the electric movable platform is provided with a baffle for limiting the hose.

2. The metal hose bending test device according to claim 1, characterized in that: The two clamping plates of the transverse clamp are provided with a distance sensor for measuring the distance between the two clamping plates.

3. The metal hose bending test device according to claim 1, characterized in that: A push rod with an arc-shaped front end is arranged at the center of the sleeve-type push plate.

4. The metal hose bending test device according to claim 1, characterized in that: The bottom of the clamping plate of the transverse clamp is rotatably connected to the sliding clamp supporting seat.

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