Safety testing fixture for buckling and pressing hydraulic hose assembly

Abstract

The utility model belongs to the technical field of hydraulic hoses, and discloses a safety testing fixture for buckling and pressing a hydraulic hose assembly, the hydraulic hose assembly comprises a hose, the end part of the hose is coated and sleeved with a sleeve, a hose joint is inserted in the hose, the hose joint is provided with a through hole communicated with the hose, and the through hole is communicated with the hose. The sleeve, the hose and the hose connector are connected in a buckling and pressing mode. The safety testing fixture comprises a first detection unit and a second detection unit. The beneficial effects of the utility model are that the first detection unit and the second detection unit of the safety detection tool are inserted into the through hole to detect the size of the through hole, and only one end of the first detection unit and one end of the second detection unit of the safety detection tool can be inserted into the through hole; therefore, the sealing performance of the hose assembly can be detected more conveniently and quickly by detecting the aperture of the through hole, pressure maintaining test does not need to be carried out on each hydraulic hose, only spot check needs to be carried out, and the efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic hoses, and particularly relates to a safety inspection tool for crimping a hydraulic hose assembly. Background Art

[0002] The hydraulic hose assembly is a fluid conveying device composed of hydraulic hoses and metal joints through buckling. The hydraulic hose assembly is mainly used for mine hydraulic supports and oil field exploitation. It is suitable for engineering construction, lifting and transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and mechanized and automated hydraulic systems in various industrial sectors to convey petroleum-based (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) and water-based liquids (such as emulsions, oil-water emulsions, water) with a certain pressure (higher pressure) and temperature and liquid transmission. The maximum working pressure resistance can reach 60MPa.

[0003] Practice has proved that during the production process of the hydraulic hose assembly, under the crimping pressure of the crimping machine, the sleeve, hose, and hose joint will undergo radial deformation. The hose joint will deform, causing the diameter of the through hole to become smaller. The deformation of the through hole is closely related to the sealing of the hose assembly. In addition, it is necessary to test the sealing between the hydraulic hose and the metal joint. The oil leakage point of the hose assembly is usually located between the hose joint and the inner wall of the hose. In the prior art, a pressure holding test is usually used to detect the sealing performance. For example, after searching the Chinese utility model patent: CN217605216U, a hydraulic hose joint sealing performance detection tool is provided, which includes a base plate, a joint connecting pipe and a slide rod. A vertical rod is fixedly installed on the upper end of the base plate, and the outer wall of the joint connecting pipe is fixedly connected to the vertical rod. One end of the joint connecting pipe is connected to a first air inlet pipe, and the other end of the joint connecting pipe is used to connect to the metal end of the hydraulic hose joint. A pressure gauge is also installed on the joint connecting pipe. A slider is provided at the lower end of the slide rod. A slide groove is opened on the upper end surface of the base plate along the axial direction of the joint connecting pipe. In the device, after the annular airbag is expanded, it cooperates with the inner wall of the circular through groove to tightly clamp the hose to form a sealing surface. At this time, compressed air can be injected into the hydraulic hose joint through the first air inlet pipe to perform sealing performance detection. The whole operation process is convenient and fast.

[0004] There is an obvious defect in the prior art, that is, the detection process takes a long time and the steps are cumbersome. Specifically, the hydraulic hose needs to be tested, and it takes thirty to forty seconds to perform a pressure test during the hydraulic hose detection. Such a detection speed is time-consuming and inefficient. More importantly, for each hydraulic hose assembly, a pressure test is required, which undoubtedly increases the difficulty of the detection work and makes the work efficiency even lower. Therefore, this shortcoming needs to be improved urgently. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems. The utility model provides a safety inspection tool for crimping a hydraulic hose assembly, which has the advantage of more convenient and quick inspection of the sealing performance of the hose assembly.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the hydraulic hose assembly includes a hose, the end of the hose is covered with a sleeve, a hose connector is inserted in the hose, the hose connector has a through hole connected to the hose, the sleeve, the hose and the hose connector are crimped and connected, and the safety inspection fixture includes a first detection unit and a second detection unit, the first detection unit and the second detection unit are both arranged in a cylindrical shape with a smooth surface, the axial lengths of the first detection unit and the second detection unit are both greater than the axial length of the hose connector, the diameter of the first detection unit is smaller than the minimum diameter of the through hole, and the diameter of the second detection unit is greater than the minimum diameter of the through hole.

[0007] Preferably, the safety inspection tool comprises a holding unit, the first detection unit is connected to a first end of the holding unit, and the second detection unit is connected to a second end of the holding unit.

[0008] Preferably, the first detection unit, the second detection unit and the holding unit are coaxially arranged.

[0009] Preferably, at least one groove is provided on the outer periphery of the gripping unit.

[0010] Preferably, the first detection unit and the second detection unit have different lengths.

[0011] Preferably, one end of the through hole away from the hose has a chamfer.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model provides a safety inspection tool for crimping a hydraulic hose assembly. The first inspection unit and the second inspection unit of the safety inspection tool are inserted into a through hole to inspect the size of the through hole. Since the sleeve and the hose joint will be deformed after the hose assembly is crimped by a crimping machine, the aperture of the through hole will be reduced, so that only one end of the first inspection unit and the second inspection unit of the safety inspection tool can be inserted into the through hole. Therefore, by inspecting the aperture of the through hole, the sealing of the hose assembly can be inspected more conveniently and quickly, and there is no need to perform a pressure holding test on each hydraulic hose, and only random inspection is required, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the hose assembly of the utility model;

[0015] Figure 2 It is a cross-sectional structural diagram of the hose assembly of the utility model;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of size 1 of the safety inspection fixture of the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the second dimension of the safety inspection fixture of the utility model;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of dimension three of the safety inspection fixture of the utility model.

[0019] Description of the drawings: 1. Hose; 2. Sleeve; 21. Protruding ring; 3. Nut; 4. Hose connector; 41. Through hole; 42. Protruding tooth ring; 43. Chamfer; 5. Safety inspection fixture; 51. First detection unit; 52. Second detection unit; 53. Grip; 531. Groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-Figure 3 As shown, the utility model is a safety gauge for crimping a hydraulic hose assembly. The hydraulic hose assembly includes a hose 1. The end of the hose 1 is covered with a sleeve 2. A hose connector 4 is inserted into the hose 1. The hose connector 4 has a through hole 41 connected to the hose 1. The sleeve 2, the hose 1 and the hose connector 4 are crimped and connected. The safety gauge 5 includes a first detection unit 51 and a second detection unit 52. The first detection unit 51 and the second detection unit 52 are both arranged in a cylindrical shape with a smooth surface. The axial lengths of the first detection unit 51 and the second detection unit 52 are both greater than the axial length of the hose connector 4. The diameter of the first detection unit 51 is smaller than the minimum diameter of the through hole 41, and the diameter of the second detection unit 52 is greater than the minimum diameter of the through hole 41.

[0022] The outer periphery of the hose connector 4 is equipped with a nut 3, which is used to connect with the external tube. The sleeve 2 is crimped by a crimping machine to make the hose 1, the sleeve 2 and the hose connector 4 fit tightly together. The first detection unit 51 and the second detection unit 52 are used to be plugged and matched with the through hole 41, and the safety inspection fixture 5 also includes a gripping unit 53, the first detection unit 51 is connected to the first end of the gripping unit 53, and the second detection unit 52 is connected to the second end of the gripping unit 53; after the hose assembly is crimped by the crimping machine, the sleeve 2 and the hose connector 4 are deformed, so that the inner wall of the sleeve 2 and the outer end surface of the hose connector 4 and the hose 1 are tightly fitted, so that the hose 1 and the hose connector 4 are sealed, and the deformation of the hose connector 4 makes the through hole The aperture 41 becomes smaller, and the first detection unit 51 and the second detection unit 52 on the safety inspection fixture 5 are alternately inserted into the through hole 41. Since the first detection unit 51 and the second detection unit 52 have different diameters, only one of the first detection unit 51 and the second detection unit 52 can be inserted into the through hole 41. The diameter of the first detection unit 51 in the present application is smaller than the diameter of the second detection unit 52. Therefore, the first detection unit 51 can be inserted into the through hole 41, while the second detection unit 52 cannot be inserted into the through hole 41. When the size of the through hole 41 meets the above conditions, it means that the through hole 41 in the hose 1 meets the size requirements, and the hose 1 and the hose connector 4 fit tightly, that is, the hose 1 and the hose connector 4 are sealed.

[0023] In addition, one end of the through hole 41 away from the hose 1 has a chamfer 43 , so that the safety gauge 5 can be better aligned with the through hole 41 .

[0024] The inner wall of the sleeve 2 has a plurality of evenly distributed convex rings 21 and the outer periphery of the hose connector 4 has a plurality of evenly distributed convex tooth rings 42. The convex rings 21 and the convex tooth rings 22 are both distributed in a stepped manner, so that after the hose assembly is buckled, the convex rings 21 and the convex tooth rings 42 can make the hose 1 tightly fit with the convex rings 21 and the convex tooth rings 43 and deform under pressure, thereby making the hose 1 more sealed.

[0025] The first detection unit 51 and the second detection unit 52 are installed at two ends of the holding unit 53 opposite to each other, and the first detection unit 51, the second detection unit 52 and the holding unit 53 are coaxially arranged.

[0026] refer to Figure 3-Figure 5At least one groove 531 is provided on the periphery of the gripping unit 53, and the groove 531 is an annular groove. Due to the different sizes of the hoses, the sizes of the first detection unit 51 and the second detection unit 52 of the safety inspection fixture 5 for detecting different through holes 41 are also different. Therefore, in order to identify the safety inspection fixture 5 with similar sizes, a plurality of grooves 531 are provided on the periphery of the gripping unit 53 to distinguish them. For example, the hose 1 has three types of hoses with apertures of 6 mm, 6.2 mm, and 6.5 mm. Since the apertures of the three hoses are similar, it is difficult to distinguish the first detection unit 51 and the second detection unit 52 on the safety inspection fixture 5 by naked eyes. In order to distinguish the size difference of the safety gauge 52, different numbers of grooves 531 are set on the outer periphery of the holding unit 53 for identification, that is, the outer periphery of the holding unit 53 of the safety gauge 5 corresponding to the hose 1 with a detection aperture of 6 mm is provided with one groove 531; the outer periphery of the holding unit 53 of the safety gauge 5 corresponding to the hose 1 with a detection aperture of 6.2 mm is provided with two grooves 531; the outer periphery of the holding unit 53 of the safety gauge 5 corresponding to the hose 1 with a detection aperture of 6.5 mm is provided with three grooves 531, so that the safety gauges of similar sizes can be more conveniently distinguished by different numbers of grooves 531.

[0027] Furthermore, the second detection unit 52 is closer to the groove 531 , and the groove 531 can also increase the friction force, allowing the user to hold it better during use.

[0028] In addition, the first detection unit 51 and the second detection unit 52 have different lengths, and the difference in lengths can also be used to distinguish the first detection unit 51 from the second detection unit 52.

[0029] Usually, the through hole 41 in the hose 1 has a large aperture size. By using each corresponding safety inspection fixture 5 to inspect the through hole 41 in the hose 1, it is only necessary to select the corresponding safety inspection fixture 5 to inspect the through hole 41 when the crimping machine crimps the sleeve 2 to the outer periphery of the hose 1. The inspection method is convenient and the inspection efficiency is higher. There is no need to perform a pressure maintenance test on each hydraulic hose, and only random inspection is required, thereby further improving efficiency.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] 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 safety inspection tool for crimping a hydraulic hose assembly, the hydraulic hose assembly comprising a hose (1), the end of the hose (1) being covered with a sleeve (2), a hose connector (4) being inserted into the hose (1), the hose connector (4) having a through hole (41) communicating with the hose (1), the sleeve (2), the hose (1) and the hose connector (4) being crimped and connected. Features: The safety inspection fixture (5) comprises a first inspection unit (51) and a second inspection unit (52); the first inspection unit (51) and the second inspection unit (52) are both arranged in the shape of a cylinder with a smooth surface; the axial lengths of the first inspection unit (51) and the second inspection unit (52) are both greater than the axial length of the hose connector (4); the diameter of the first inspection unit (51) is smaller than the minimum diameter of the through hole (41); and the diameter of the second inspection unit (52) is greater than the minimum diameter of the through hole (41).

2. A safety inspection tool for crimping a hydraulic hose assembly according to claim 1, Features: The safety gauge (5) comprises a holding unit (53), the first detection unit (51) is connected to a first end of the holding unit (53), and the second detection unit (52) is connected to a second end of the holding unit (53).

3. A safety inspection tool for crimping a hydraulic hose assembly according to claim 2, Features: The first detection unit (51), the second detection unit (52) and the holding unit (53) are arranged concentrically and coaxially.

4. A safety inspection tool for crimping a hydraulic hose assembly according to claim 2, Features: At least one groove (531) is provided on the outer periphery of the holding unit (53).

5. A safety inspection tool for crimping a hydraulic hose assembly according to claim 1, Features: The first detection unit (51) and the second detection unit (52) have different lengths.

6. A safety inspection tool for crimping a hydraulic hose assembly according to claim 1, Features: An end of the through hole (41) away from the hose (1) has a chamfer (43).

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