A device suitable for pressure gauge detection

Abstract

This utility model discloses a device suitable for pressure gauge testing, belonging to the field of pressure gauge testing technology. The device includes multiple connectable testing units, with adjacent units connected in series via pressure-measuring air tubes to form an integrated system supplied by the same pressure source. Each testing unit includes a testing platform, a base, and a universal support tube. The base is fixed to the platform, with an air outlet on its top surface and a ventilation interface on its side. The lower end of the universal support tube is connected to the air outlet of the base via a quick-connect coupling, and the upper end is connected to the pressure gauge via a quick-connect coupling; it consists of an external universal positioning tube and an internal pressure-measuring hose. The universal positioning tube uses a single-spiral metal tube and a double-layer reverse micro-spot-welded steel wire mesh to form the core layer, enabling arbitrary bending and instantaneous self-locking positioning. This utility model solves the problems of poor stability and low efficiency in manual handheld testing, realizing rapid clamping, multi-angle stable positioning, and integrated testing of pressure gauges, significantly improving testing efficiency and operational safety.

Description

Technical Field

[0001] This utility model relates to the field of pressure gauge testing technology, and in particular to a device suitable for pressure gauge testing. Background Technology

[0002] A pressure gauge is an instrument that uses an elastic element as its sensing element to measure and indicate pressures higher than ambient pressure. Mechanical pressure gauges are increasingly widely used in heating networks, oil and gas transmission, water and gas supply systems, vehicle repair and maintenance shops, and especially in industrial process control and technical measurement. Due to the high mechanical strength and ease of production of the elastic sensing element, mechanical pressure gauges are increasingly widely used.

[0003] Currently, pressure gauges typically undergo quality inspection at multiple workstations after assembly. This includes checking the accuracy of the pressure readings, manually verifying dimensional conformity, and visually inspecting external components such as the case, pointers, and dial printing for damage and clarity. Existing inspection methods are not only fragmented and inefficient, but manual dimensional verification also suffers from instability and operational inconvenience. Utility Model Content

[0004] The purpose of this invention is to provide a device suitable for pressure gauge detection, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for pressure gauge testing, characterized in that it includes multiple connectable testing units, adjacent testing units are connected in series via pressure measuring air tubes to form an integrated testing system supplied by the same pressure source;

[0007] The detection unit includes:

[0008] Testing platform;

[0009] The base is fixedly installed on the detection platform. It has an air outlet on its top surface and a ventilation interface on its side. The ventilation interface is used to connect the pressure measuring air tube. The pressure measuring hose can be a regular brand PU tube, nylon tube or stainless steel braided high-pressure hose, depending on the measurement range of the pressure gauge.

[0010] The universal support tube has its lower end detachably connected to the air outlet of the base, and its upper end is provided with an interface for directly connecting the pressure gauge to be tested.

[0011] The universal support tube includes an outer universal positioning tube and a pressure measuring hose passing through it; the two ends of the pressure measuring hose are respectively sealed to the air outlet of the base and the interface at the upper end.

[0012] The universal positioning tube includes:

[0013] The core layer comprises a single spiral metal tube and a wire mesh wrapped around the single spiral metal tube; the hollow single spiral metal tube is formed by winding a high-strength metal strip into a hollow, continuous single spiral tube, providing axial support and elasticity to recover deformation; when bent, one side is stretched and the other side is compressed; the wire mesh is composed of at least two layers of fine steel wire wound at different helix angles, and the intersections of the steel wires are fixed by welding.

[0014] An inner lining layer covers the inner wall of the core layer; the inner lining layer is made of a PVC protective layer and covers the inner wall of the core layer, maintaining the internal circular channel for the pressure measuring gas tube to pass through.

[0015] An outer sheathing layer is attached to the outer wall of the core layer. This outer sheathing layer is composed of a PVC or TPU insulating and wear-resistant layer, protecting the core layer from corrosion and scratches.

[0016] Preferably, the wire mesh includes an inner layer of steel wire and an outer layer of steel wire. The winding direction of the inner layer of steel wire is opposite to the spiral direction of the single spiral metal tube, and the winding direction of the outer layer of steel wire is opposite to the winding direction of the inner layer of steel wire. The two layers of mesh form a cross-woven grid structure.

[0017] When bending: When an external force is applied, it overcomes the static friction generated by the intersecting steel wires of the two layers of wrapping mesh, and a slight relative sliding occurs between the steel wires, allowing the overall structure to deform.

[0018] During the shaping process: when the external force disappears, the static friction between the intersecting steel wires is restored instantly. This friction is much greater than the elastic force of the deformation of the single spiral metal tube, thus firmly locking the structure in its current form.

[0019] Preferably, the first quick-change connector, the second quick-change connector, the air outlet and the venting interface of the base are all standard M20×1.5 threaded interfaces.

[0020] Preferably, the detection unit is connected in series with a manual safety pressure relief valve.

[0021] Preferably, the base is fixed to the testing platform by a threaded connection.

[0022] Preferably, the detection units share a common detection platform, which is equipped with a standard installation grid array for the orderly arrangement of the pressure measuring gas tubes.

[0023] Compared with the prior art, the device for pressure gauge detection proposed in this application has the following advantages:

[0024] 1. Integrated and modular testing significantly improves testing efficiency: An integrated testing system is constructed through multiple connectable testing units and a series-connected gas path design. This allows inspectors to perform sequential or synchronous testing on multiple pressure gauges from the same workstation and using the same pressure source. This changes the traditional decentralized, multi-workstation testing process, centralizing operations and improving testing efficiency, making it particularly suitable for the factory inspection of batches of pressure gauges.

[0025] 2. It solves the problem of poor stability when manually handheld, ensuring both testing accuracy and ease of operation:

[0026] • Flexible and precise positioning: The innovative universal support fitting uses a single-spiral metal tube in its core layer to provide flexibility and resilience, while a double-layer reverse steel wire mesh fixed by micro-spot welding generates enormous static friction, achieving the function of "arbitrary bending and instant locking". Inspectors can easily adjust the pressure gauge to any optimal viewing angle and position and hold it firmly, completely freeing their hands and avoiding the shaking and viewing deviation caused by hand handling.

[0027] • Quick clamping and replacement: The use of standard threaded interfaces (such as M20×1.5) and quick-change couplings enables quick and sealed connection and disassembly of pressure gauges and air circuits. Changing the gauge to be tested only takes a few seconds, further improving operating efficiency and reducing labor intensity.

[0028] 3. Enhanced the versatility, safety, and reliability of the device:

[0029] • Strong adaptability of core components: The pressure measuring hose (such as PU hose, nylon hose or high pressure hose) can be flexibly selected according to the pressure range to adapt to the testing needs of different types of pressure gauges from low pressure to high pressure.

[0030] • Enhanced safety: The pipeline is equipped with a manual safety pressure relief valve, which can quickly and safely release the residual pressure in the pipeline after the test or when necessary, avoiding the risks caused by the sudden release of high-pressure gas and making operation safer.

[0031] • The system is clean and reliable: The public testing platform and its standard installation grid array design make the gas path layout neat when multiple units are spliced, avoiding the loosening or leakage of interfaces caused by pipeline entanglement and pulling, thus improving the stability and service life of the system.

[0032] 4. Innovative Structure and Superior Performance: The universal support fitting not only achieves excellent directional retention but also ensures overall durability through its multi-layer design. The inner lining protects the pressure testing hose from wear by the metal core layer; the outer sheath effectively prevents corrosion and wear; and the micro-spot welding process ensures the overall structural strength of the wire mesh, preventing loosening caused by wire slippage after long-term use, resulting in a long service life and high reliability.

[0033] In summary, this utility model not only integrates the testing process, but also solves the long-standing problems of inconvenience and poor stability of manual operation through innovation in the core mechanical structure, achieving a comprehensive improvement in efficiency, accuracy and reliability. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0035] Figure 2 This is a schematic diagram of the detection unit in an embodiment of the present invention;

[0036] Figure 3 This is an exploded view of the detection unit in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the working state of the detection unit in this embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the universal support tube in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the universal positioning tube in an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the core layer in an embodiment of the present invention.

[0041] Reference numerals: 100, Testing platform; 101, Mounting grid array; 200, Pressure measuring air tube; 300, Base; 302, Vent interface; 303, Air outlet; 400, Universal support fitting; 401, Universal positioning tube; 402, Pressure measuring hose; 403, Core layer; 404, Single spiral metal tube; 405, Inner steel wire; 406, Outer steel wire; 407, Inner lining layer; 408, Outer sheath layer; 500, First quick-connect coupling; 700, Second quick-connect coupling; 800, Pressure gauge. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0043] Example

[0044] like Figure 1-7 As shown, this embodiment provides a device suitable for pressure gauge testing. The device mainly consists of a common testing platform 100 and three identical testing units (one set is described as an example) connected in series through a pressure measuring tube 200.

[0045] The public testing platform 100 is a rectangular platform with a matrix of mounting grid holes 101 machined on its surface. The testing unit includes a base 300 and a universal support tube 400, such as... Figure 2-3 As shown.

[0046] The base 300 is threadedly connected to the detection platform 100 via a selected mounting grid array 101. The top surface of the base 300 has an air outlet 303, and its side surface has a ventilation interface 302. In this embodiment, both the ventilation interface 302 and the air outlet 303 use standard M20×1.5 external thread interfaces. The bases 300 of adjacent detection units are connected via pressure-measuring air pipes 200. Specifically, the two ends of one pressure-measuring air pipe 200 are connected to the ventilation interface 302 of one base 300 and the ventilation interface 302 of another adjacent base 300, thus achieving series connection of the air circuits. Depending on whether the pressure source can provide air circuit pressure relief protection, a manual safety pressure relief valve can be selected for series connection at the beginning of the air circuit.

[0047] The lower end of the universal support fitting 400 is detachably connected to the air outlet 303 on the top surface of the base 300 via a first quick-connect coupling 500, and its upper end is connected to the mounting interface for installing the pressure gauge 800 to be tested via a second quick-connect coupling 700. Figure 5 As shown, the universal support tube 400 includes an outer universal positioning tube 401 and a pressure measuring hose 402 passing through it.

[0048] like Figure 6 As shown, the universal positioning tube 401 is a flexible tube that can be bent arbitrarily and maintain its shape after deformation. It consists of three layers from the inside out:

[0049] Core layer 403: such as Figure 7 As shown, the main body consists of a single spiral metal tube 404 formed by winding a high-strength stainless steel strip, providing basic axial support and elastic recovery force. On the outside of the single spiral metal tube 404, a wire mesh consisting of two layers of fine steel wires is tightly wrapped. The inner layer of steel wire 405 is wound in the opposite direction to the spiral direction of the single spiral metal tube 404, and the outer layer of steel wire 406 is wound in the opposite direction to the inner layer of steel wire 405. The intersection of the two layers of steel wires is fixed by a micro-spot welding process, forming an integral mesh structure with high static friction, which is the core of achieving the function of "arbitrary bending and instant locking".

[0050] Inner lining 407: A smooth protective layer made of PVC material, covering the inner wall of the core layer 403. Its function is to maintain the smoothness and integrity of the internal channel and prevent the internal pressure measuring hose 402 from being worn when passing through or the universal positioning tube 401 is bent.

[0051] Outer layer 408: An insulating and wear-resistant layer made of TPU material, wrapped around the outer wall of the core layer 403, used to prevent the core layer from being corroded and scratched, and to extend its service life.

[0052] The pressure testing hose 402 is selected according to the range of the pressure gauge to be tested. It can be a PU hose, nylon hose or stainless steel braided high-pressure hose. Its lower end is sealed to the internal channel of the first quick-connect coupling 500, and its upper end is sealed to the internal channel of a second quick-connect coupling 700.

[0053] In this embodiment, the air outlet 303 and vent interface 302 of the first quick-change connector 500, the second quick-change connector 700, and the base 300 all adopt standard M20×1.5 threaded interfaces, ensuring the universality and sealing of the connection.

[0054] Working principle and usage process:

[0055] During testing, the operator first installs the corresponding number of testing units onto the mounting grid array 101 of the common testing platform 100 via the base 300, according to the number of pressure gauges 800 to be tested, and connects them in series with the pressure measuring air pipe 200, and connects the pressure source to the beginning of the pipeline.

[0056] Install the pressure gauge: Take a universal support fitting 400, insert its lower first quick-connect fitting 500 into the air outlet 303 on the top surface of the base 300 and tighten it. Then screw the interface of the pressure gauge 800 to be tested into the upper second quick-connect fitting 700.

[0057] Adjusting the angle to check dimensions and appearance: By bending the universal support fitting 400 by hand, the pressure gauge 800 can be easily adjusted to any angle and height that facilitates dimension checking, visual inspection, and reading. After releasing, the static friction generated by the steel wire mesh structure in the core layer 403 of the universal positioning tube 401 will instantly lock its shape and firmly maintain its position without manual handling.

[0058] Apply detection pressure: Turn on the pressure source, and pressurized gas flows sequentially through all the connected detection units, providing a stable and identical pressure value to all pressure gauges 800 for detection.

[0059] Reading and Recording: Operators can sequentially read and record the pressure of each stable hovering pressure gauge 800.

[0060] Replacement and depressurization: After testing, turn off the pressure source and depressurize to bring the system pressure to zero. Then, unscrew the tested pressure gauge 800 from the second quick-connect fitting 700, replace it with a new gauge, and proceed to the next round of testing.

[0061] This device enables integrated and modular testing of multiple pressure gauges, is easy to operate, has good stability, and greatly improves testing efficiency.

[0062] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device suitable for pressure gauge detection, characterized in that, It includes multiple connectable detection units, and adjacent detection units are connected in series through pressure measuring air tubes to form an integrated detection system powered by the same pressure source; The detection unit includes: Testing platform; The base is fixedly mounted on the detection platform. It has an air outlet on its top surface and an air vent on its side. The air vent is used to connect the pressure measuring air tube. The universal support tube has its lower end detachably connected to the air outlet of the base via a first quick-connect coupling, and its upper end connected to the mounting interface for installing the pressure gauge to be tested via a second quick-connect coupling. The universal support tube includes an outer universal positioning tube and a pressure testing hose passing through it; the two ends of the pressure testing hose are respectively sealed and connected to the first quick-connect coupling and the second quick-connect coupling. The universal positioning tube includes: The core layer includes a single spiral metal tube and a wire mesh wrapped around the single spiral metal tube. The wire mesh is composed of at least two layers of fine steel wires wound at different spiral angles, and all the steel wire intersections are fixed into a whole by micro-spot welding. The inner lining layer, covering the inner wall of the core layer, is used to maintain the smoothness and integrity of the internal channels; The outer cladding layer, which wraps around the outer wall of the core layer, serves for insulation and wear resistance.

2. The apparatus according to claim 1, characterized in that, The wire mesh includes an inner layer of steel wire and an outer layer of steel wire. The winding direction of the inner layer of steel wire is opposite to the spiral direction of the single spiral metal tube, and the winding direction of the outer layer of steel wire is opposite to the winding direction of the inner layer of steel wire.

3. The apparatus according to claim 1, characterized in that, The first quick-change connector, the second quick-change connector, the air outlet and the vent interface of the base are all standard M20×1.5 threaded interfaces.

4. The apparatus according to claim 1, characterized in that, The detection unit is connected in series with a manual safety pressure relief valve.

5. The apparatus according to claim 1, characterized in that, The base is fixed to the testing platform by a threaded connection.

6. The apparatus according to claim 5, characterized in that, The detection units share a common detection platform, which is equipped with a standard installation grid array for the orderly arrangement of the pressure measuring gas tubes.

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