Pressure test device for metal hose

Abstract

The utility model discloses a pressure test device for a metal hose. The metal hose comprises a welding end and a nut end, the metal hose pressure resistance test device comprises a pressing part, a U-shaped fixing support, a sealing gland, a check ring and a pressure test connector. In the using state, the sealing gland seals the opening of the welding end, the opening end of the U-shaped fixing support is fixedly connected with the metal hose through the check ring, and the welding end extends into the U-shaped fixing support from the opening end of the U-shaped fixing support. The pressing part is arranged at the closed end of the U-shaped fixing support in a penetrating mode and presses the sealing gland, and the pressure testing connector is detachably connected to the nut end. The pressure test device for the metal hose of which one end is in threaded connection and the other end is welded is structurally designed, is convenient to mount, simple to operate, safe and reliable, and can be used for carrying out pressure test on various metal hoses only by replacing the split check ring.

Description

Technical Field

[0001] The utility model relates to the technical field of metal hose manufacturing, in particular to a metal hose pressure resistance test device. Background Art

[0002] The metal hose is made of the body, mesh sleeve, socket, sheath, joint and slip-on nut by argon arc welding. Conventional metal hoses have slip-on nuts at both ends that are threadedly connected to the hard pipe on site. After being manufactured according to standard requirements, a pressure test should be carried out and only qualified ones can be shipped out of the factory.

[0003] When a conventional metal hose is pressure tested, a pressure test plug is installed at one end for sealing, and a pressure test joint is installed at the other end to connect to the air compressor gas source pipe for pressure testing. When a metal hose with a threaded connection at one end and a welded connection at the other end is pressure tested, there is currently no standardized pressure test device.

[0004] The problem that urgently needs to be improved is to design a special pressure test device for the metal hose that is threaded at one end and welded at the other end to conduct a pressure test, and to conduct a pressure test on the metal hose including DN25 to DN65 by only replacing some parts in the test device.

[0005] In view of this, the existing technology should be improved to solve the above-mentioned technical problems existing in the existing technology. Utility Model Content

[0006] The main purpose of the utility model is to provide a metal hose pressure test device, which is structurally designed for a metal hose pressure test device with one end threaded and the other end welded, and is easy to install, simple to operate, safe and reliable. The device has the characteristics of simple structure and convenient disassembly, with obvious improvement effect and is suitable for popularization and use.

[0007] According to one aspect of the utility model, a metal hose pressure test device is proposed, wherein the metal hose comprises a welding end and a nut end; the metal hose pressure test device comprises a clamping portion, a U-shaped fixing bracket, a sealing gland, a retaining ring and a pressure test joint; in use, the sealing gland seals the opening of the welding end, the open end of the U-shaped fixing bracket is fixedly connected to the metal hose through the retaining ring, the welding end extends from the open end of the U-shaped fixing bracket into the U-shaped fixing bracket, the clamping portion is penetrated through the closed end of the U-shaped fixing bracket and clamps the sealing gland, and the pressure test joint is detachably connected to the nut end.

[0008] According to an embodiment of the utility model, the retaining ring includes a first split retaining ring and a second split retaining ring which are symmetrically split from a complete retaining ring along the radial direction, and the first split retaining ring and the second split retaining ring are symmetrically arranged on the outer periphery of the metal hose.

[0009] According to an embodiment of the utility model, the metal hose comprises a metal hose body and a metal hose sheath sleeved outside the metal hose body; the retaining ring is engaged with the end surface of the metal hose sheath.

[0010] According to an embodiment of the present utility model, a step portion is provided at the open end of the U-shaped fixing bracket, and the retaining ring is engaged with the step portion.

[0011] According to an embodiment of the utility model, the sealing gland forms an annular groove, a sealing ring is provided in the annular groove, and the welding end is inserted into the annular groove.

[0012] According to an embodiment of the utility model, the clamping portion is a clamping bolt, and the closed end of the U-shaped fixing bracket forms a threaded hole that cooperates with the clamping bolt.

[0013] According to an embodiment of the present invention, the clamping bolt is vertically abutted against the sealing cover.

[0014] According to an embodiment of the utility model, the pressure test joint is detachably connected to the air source pipe of the air compressor.

[0015] According to an embodiment of the present invention, the cross-sectional area of ​​the sealing gland is larger than the cross-sectional area of ​​the metal hose body.

[0016] According to an embodiment of the utility model, the retaining ring is detachably arranged between the outer periphery of the metal hose and the U-shaped fixing bracket.

[0017] In the metal hose pressure test device according to the embodiment of the utility model, a metal hose pressure test device with a threaded connection at one end and welded at the other end is structurally designed, which is easy to install, simple to operate, safe and reliable. It only needs to replace the split retaining ring to perform pressure tests on various types of metal hoses. The device has the characteristics of simple structure and convenient disassembly and connection, with obvious improvement effect and is suitable for popularization and use.

[0018] Compared with the prior art, the utility model has the advantages of effectively reducing production costs; high equipment utilization rate and being simple and easy to learn; reducing labor intensity and saving working time; and having stronger versatility and being suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some implementation cases of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a metal hose pressure test device according to an exemplary embodiment of the present utility model is shown.

[0021] In the figure:

[0022] 1-tightening bolt; 2-U-shaped fixing bracket; 3-sealing gland; 4-metal hose sheath; 5-retaining ring; 6-metal hose body; 7-metal hose nut; 8-pressure test joint. DETAILED DESCRIPTION

[0023] The detailed description of the following embodiments is used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0024] The utility model provides these embodiments to make the disclosure thorough and complete, and to fully express the scope of the utility model to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as merely exemplary, rather than as limiting.

[0025] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0026] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0027] All terms used in the present invention have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0028] Technologies, methods, and apparatus known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, these technologies, methods, and apparatus should be considered part of the specification.

[0029] like Figure 1 As shown, the utility model provides a metal hose pressure test device, the metal hose includes a welding end and a nut end; the metal hose pressure test device includes a clamping portion, a U-shaped fixing bracket 2, a sealing gland 3, a retaining ring 5 and a pressure test joint 8. In use, the sealing gland 3 seals the opening of the welding end to provide a reliable seal and also protect the metal hose. The open end of the U-shaped fixing bracket 2 is fixedly connected to the metal hose through the retaining ring 5, the welding end extends from the open end of the U-shaped fixing bracket 2 into the U-shaped fixing bracket 2, and the U-shaped opening of the U-shaped fixing bracket 2 is fixedly connected to the metal hose through the retaining ring 5.

[0030] In some specific embodiments, the clamping portion is inserted through the closed end of the U-shaped fixing bracket 2, and the head of the clamping portion has a tip, which abuts against the top of the sealing gland 3, that is, the closed end of the U-shaped fixing bracket 2. The metal hose includes a metal hose body 6 and a metal hose sheath 4 wrapped around the outside of the metal hose body 6, and the retaining ring 5 is connected to the end surface of the metal hose sheath 4. The nut end is provided with a metal hose nut 7, and the metal hose nut 7 is detachably connected to the pressure test joint 8, thereby completing the test.

[0031] In the metal hose pressure test device according to the embodiment of the utility model, a metal hose pressure test device with a threaded connection at one end and welded at the other end is structurally designed, which is easy to install, simple to operate, safe and reliable. It only needs to replace the retaining ring 5 of different sizes (for example, different inner diameters) to perform pressure tests on various types of metal hoses with different radial sizes.

[0032] The opening end of the U-shaped fixing bracket 2 is provided with a step portion, and the retaining ring 5 is engaged with the step portion. The retaining ring 5 is radially abutted between the step portion and the metal hose, and axially abutted between the step portion and the metal hose sheath 4.

[0033] The sealing gland 3 forms an annular groove, a sealing ring is arranged in the annular groove, and the welding end is inserted into the annular groove.

[0034] After the metal hose is manufactured, first insert the sealing gland 3 with the sealing ring on one side into the welding end of the metal hose, assemble the clamping bolt 1 and the U-shaped fixing bracket 2 into a whole and then insert it into the welding end of the metal hose, then put the split retaining ring into the inner side of the U-shaped fixing bracket 2, and place one side of the inner hole of the retaining ring 5 on the end face of the metal hose sheath 4. By adjusting the clamping bolt 1, the U-shaped fixing bracket 2, the sealing gland 3, the retaining ring 5 and the metal hose sheath 4 are connected into a "rigid whole" for sealing; the end of the metal hose nut 7 is connected to the pressure test joint 8, and the pressure test joint 8 is then connected to the air source pipe of the air compressor for a pressure test.

[0035] In some embodiments, the metal hose sheath 4 is usually woven from materials such as metal wire or plastic, and its appearance and structure can be customized according to actual needs. The metal hose sheath 4 can effectively share the external pressure and impact borne by the technical hose, and improve the pressure resistance and durability of the metal hose. In addition, the metal hose sheath 4 can also prevent the metal hose from being damaged when bending or moving, reducing the risk of rupture or wear of the metal hose.

[0036] The clamping portion is a clamping bolt 1 , and a threaded hole matching with the clamping bolt 1 is formed at the closed end of the U-shaped fixing bracket 2 .

[0037] In some embodiments, the clamping bolt 1 is vertically abutted against the sealing gland 3. The vertically abutting clamping bolt 1 can ensure that the contact surface is vertically stressed, so that the clamping force can be easily adjusted to make the pressure between the sealing gland 3 and the metal hose moderate. The vertically arranged clamping bolt 1 can tightly compress the sealing gland 3, making the contact between it and the metal hose closer, thereby improving the sealing performance. Since the clamping bolt 1 is vertically arranged on the sealing gland 3, it can effectively prevent the bolt from loosening, which can ensure the durability and stability of the sealing effect and reduce the frequency of maintenance and replacement.

[0038] On the basis of the above embodiment, the pressure test joint 8 is detachably connected to the air compressor air source pipe. The air compressor air source pipe is a pipeline system used to connect the air compressor and subsequent processing equipment, which is used to ensure that the compressed air can be stably transmitted from the air compressor to the required equipment and meet the requirements of the subsequent processing equipment for the air source. The detachable connection allows the device to adapt to the use requirements in different environments during the test.

[0039] In some embodiments, the cross-sectional area of ​​the sealing gland 3 is larger than the cross-sectional area of ​​the metal hose body 6. The larger cross-sectional area of ​​the sealing gland 3 allows it to better protect the metal hose from external factors such as mechanical impact, corrosion, etc.; the larger contact area can also disperse external pressure and stress, reducing the risk of damage to the metal hose; it can also better adapt to metal hoses of different specifications and sizes, and facilitate replacement, thereby improving the adaptability and service life of the system. On the basis of the above embodiments, the retaining ring 5 is a split retaining ring, which prevents the metal hose from axial movement, thereby improving the overall stability of the device. It includes a first split retaining ring and a second split retaining ring that are symmetrically split from a complete retaining ring along the radial direction, and the first split retaining ring and the second split retaining ring are symmetrically arranged on the outer periphery of the metal hose. The design of the first split retaining ring and the second split retaining ring makes installation and disassembly relatively simple, and retaining rings 5 ​​of various sizes can be quickly fixed on the outer periphery of the welding end, which is convenient for testing metal hoses of multiple sizes.

[0040] Based on the above embodiments, the metal hose includes a metal hose body 6 and a metal hose sheath 4 sleeved on the metal hose body 6; the retaining ring 5 is joined to the end face of the metal hose sheath 4, and the movable connection between the retaining ring 5 and the metal hose sheath 4 improves the flexibility of the device.

[0041] Based on the above embodiment, the metal hose sheath 4 is a closed-end structure. The closed-end structure can fit tightly on the metal hose, thereby reducing damage to the metal hose during the test and extending the service life of the metal hose. Fixing by tightening or closing also makes installation easier and improves the practicality of the device.

[0042] Based on the above embodiment, the retaining ring 5 is detachably arranged between the outer periphery of the metal hose and the U-shaped fixing bracket 2. The detachable retaining ring 5 allows pressure tests to be performed on various metal hoses by only replacing the split retaining ring during the test.

[0043] Specifically, the device of the present application is particularly suitable for the pressure resistance test of metal hoses of types DN25 to DN65.

[0044] In some embodiments, the inner sidewalls of the first split retaining ring and the second split retaining ring are provided with anti-skid pads. The provision of anti-skid pads can provide greater friction, so that the retaining ring 5 can be more firmly fixed to the outer periphery of the welding end; the anti-skid pads can also reduce the friction between the retaining ring 5 and the welding end, thereby reducing wear and tear, thereby extending the service life of the metal hose, and in the test process of metal hoses of multiple sizes, there will be no high maintenance cost due to frequent replacement of the retaining ring 5.

[0045] A specific application of the utility model is: after the metal hose is manufactured, the welding end is closed by using a retaining ring 5, a U-shaped fixing bracket 2, a clamping bolt 1 and a sealing gland 3, and the sealing gland 3 is sealed with the welding end of the metal hose by adjusting the clamping bolt 1; the nut end is connected to the pressure test joint 8, and the pressure test joint 8 is then connected to the air compressor air source pipe for a pressure test. By replacing the retaining ring 5 in this test device, the pressure test of the metal hose with a model of DN25 to DN65 can be realized.

[0046] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the above embodiments of the present invention, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A metal hose pressure test device, characterized in that: The metal hose includes a welding end and a nut end; the metal hose pressure test device includes a clamping portion, a U-shaped fixing bracket, a sealing gland, a retaining ring and a pressure test joint; in use, the sealing gland seals the opening of the welding end, the open end of the U-shaped fixing bracket is fixedly connected to the metal hose through the retaining ring, the welding end extends from the open end of the U-shaped fixing bracket into the U-shaped fixing bracket, the clamping portion is penetrated through the closed end of the U-shaped fixing bracket and clamps the sealing gland, and the pressure test joint is detachably connected to the nut end.

2. The metal hose pressure test device according to claim 1, characterized in that: The retaining ring comprises a first split retaining ring and a second split retaining ring which are symmetrically split from a complete retaining ring in radial direction, and the first split retaining ring and the second split retaining ring are symmetrically arranged on the outer periphery of the metal hose.

3. The metal hose pressure test device according to claim 1, characterized in that: The metal hose comprises a metal hose body and a metal hose sheath sleeved outside the metal hose body; the retaining ring is connected to the end surface of the metal hose sheath.

4. The metal hose pressure test device according to claim 1, characterized in that: A step portion is provided at the open end of the U-shaped fixing bracket, and the retaining ring is engaged with the step portion.

5. The metal hose pressure test device according to claim 1, characterized in that: The sealing gland forms an annular groove, a sealing ring is arranged in the annular groove, and the welding end is inserted into the annular groove.

6. The metal hose pressure test device according to claim 1, characterized in that: The clamping portion is a clamping bolt, and a threaded hole matching with the clamping bolt is formed at the closed end of the U-shaped fixing bracket.

7. The metal hose pressure test device according to claim 6, characterized in that: The clamping bolt is vertically abutted against the sealing gland.

8. The metal hose pressure test device according to claim 1, characterized in that: The pressure test joint is detachably connected to the air source pipe of the air compressor.

9. The metal hose pressure test device according to claim 3, characterized in that: The cross-sectional area of ​​the sealing gland is larger than the cross-sectional area of ​​the metal hose body.

10. The metal hose pressure test device according to claim 1, characterized in that: The retaining ring is detachably arranged between the outer periphery of the metal hose and the U-shaped fixing bracket.

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