A pollution alarm detection fixture for airborne differential pressure signal device

Abstract

This utility model discloses a pollution alarm detection fixture for an airborne differential pressure signaler, belonging to the technical field of aviation testing equipment. The fixture includes a detection block containing two identical pressure chambers, pressure chamber one and pressure chamber two, both connected to a piston chamber. A piston is installed within each piston chamber, and the upper end of the piston is connected to an external handle via a threaded rod. The piston position can be adjusted by manually rotating the handle, thereby regulating the internal pressure of the pressure chamber. Each pressure chamber has a corresponding connecting pipe interface and a pressure gauge, which can be connected to the high-pressure and low-pressure ends of the differential pressure signaler, respectively. Differential pressure simulation testing of the differential pressure signaler can be achieved through piston pressure adjustment or an external air source. This fixture is compact, flexible in use, and has good sealing performance, making it suitable for functional testing of airborne differential pressure signalers in environments without a test bench. It has good engineering adaptability and promising prospects for widespread application.

Description

Technical Field

[0001] This utility model relates to the field of differential pressure signal detection technology, specifically to a pollution alarm detection tooling for an airborne differential pressure signal. Background Technology

[0002] Airborne differential pressure signalers are typically used to monitor the differential pressure status of filters in hydraulic systems to determine whether the filters are clogged or contaminated. This device primarily relies on the pressure difference between the high-pressure and low-pressure chambers for triggering. The low-pressure chamber is usually open to the atmosphere, while the high-pressure chamber is connected to an external test pressure source (such as a test bench).

[0003] Current testing methods rely on pressure testing using test benches, which are typically large, expensive, and inconvenient for on-site testing and rapid verification. Especially when a test bench is not available at the customer's site, it is impossible to test differential pressure signalers, severely limiting the on-site maintenance capabilities and delivery efficiency of such devices. Furthermore, some existing testing equipment has a simple structure, lacks the ability to switch between high and low pressure chambers, and cannot manually adjust the test pressure, resulting in poor practicality and flexibility. Based on these issues, the industry urgently needs a portable testing fixture that can replace traditional test benches, possessing basic differential pressure signaler testing functions, a compact structure, easy operation, support for manual or external pressure adjustment, and flexible switching between high and low pressure chambers, to improve on-site testing efficiency and maintenance response capabilities. Utility Model Content

[0004] The technical problem this invention aims to solve is to overcome existing defects and provide an airborne differential pressure signaler pollution alarm detection fixture. By setting up a dual-pressure chamber structure and a manually adjustable piston device, it realizes portable testing of differential pressure signals without a test bench. It has the advantages of compact structure, flexible use, various pressure adjustment methods, support for manual or external air sources, switchable high and low pressure chambers, reliable sealing, and intuitive pressure monitoring. It significantly improves the efficiency and adaptability of field testing of differential pressure signals and can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pollution alarm detection fixture for an airborne differential pressure signal device, comprising a detection block and a pressure chamber. The pressure chamber is disposed inside the detection block. A piston chamber communicating with the pressure chamber is disposed vertically on the detection block. A piston is slidably connected to the inner wall of the piston chamber. A threaded rod is rotatably connected above the piston. A first connector and a second connector communicating with the pressure chamber are disposed on the side of the detection block. Plugs are threadedly connected to the first and second connectors, respectively. Both the first and second connectors can be sealed with plugs. The internal pressure of the pressure chamber is adjusted by changing the position of the piston. This structure can meet the requirement of testing the filter differential pressure signal device even without a pressure pump. Alternatively, the second connector can be sealed as a spare connector. The second connector is connected to a pressure pump, and the internal pressure of the pressure chamber is applied by an external pressure pump. The device has two pressure chambers, designated as Pressure Chamber 1 and Pressure Chamber 2. Pressure Chamber 1 and Pressure Chamber 2 have identical structures and can be used for switching between high-pressure and low-pressure applications. In use, one chamber acts as the high-pressure chamber, connected to the high-pressure inlet of the differential pressure signaler, while the other acts as the low-pressure chamber, connected to the low-pressure inlet of the differential pressure signaler. The low-pressure chamber's connector can be directly connected to the external atmosphere without a plug. Two pressure gauges are installed on the detection block, connected to Pressure Chamber 1 and Pressure Chamber 2 respectively via connecting pipes. These gauges are used to detect the pressure in Pressure Chamber 1 and Pressure Chamber 2, and the pressure difference between them can be calculated. This structure allows Pressure Chamber 1 and Pressure Chamber 2 to function as both high-pressure and low-pressure chambers, offering flexibility. The pressure can be increased by an air pump or a piston to meet various application requirements.

[0006] Furthermore, a bracket is provided on the top of the test block, which is threadedly connected to a threaded rod. A handle is provided at the upper end of the threaded rod. By turning the handle, the threaded rod is rotated, which in turn drives the piston downward. The piston compresses air, thereby adjusting the pressure at the end of the pressure chamber. This pressure adjustment method can be manually adjusted, which has the advantage of flexibility and meets the testing requirements. A sealing ring is provided between the circumference of the piston and the inner wall of the piston chamber. The sealing ring provides a seal in the circumference of the piston to prevent air leakage.

[0007] Furthermore, the front side of the detection block is provided with interface one and interface two, which are connected to pressure chamber one and pressure chamber two respectively. Interface one and interface two are used to connect to the high pressure port and low pressure port of the differential pressure signaler respectively.

[0008] Furthermore, the lower surface of the detection block is provided with support legs, and the lower end of the support legs is provided with fixing holes. The support legs are used to support the detection block as a whole, or screws can be used to fix it firmly through the fixing holes.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. This fixture, with its internal adjustable pressure chamber and piston structure, enables differential pressure simulation testing of airborne differential pressure signalers even without an external pressure source or test bench. This breaks through the dependence of traditional testing methods on large test benches and significantly improves the flexibility and efficiency of on-site testing and emergency verification.

[0011] 2. This technical solution has two pressure chambers with the same structure but independently sealed, which are used as high-pressure chamber and low-pressure chamber respectively. They can be interchanged by adjusting the physical connection method to adapt to different test conditions and meet the pressure simulation requirements of differential pressure signaler at different ports, thereby improving the versatility and adaptability of the system.

[0012] 3. The tooling design allows for the compression of air by driving the piston through the threaded rod, creating internal pressure changes. It can also be pressurized by connecting an external air pump to the pipe interface. Users can flexibly choose the pressure adjustment method according to the test environment, ensuring independent operability while maintaining compatibility with standard air source systems.

[0013] 4. The fixture is equipped with two independent pressure gauges, which are connected to pressure chamber one and pressure chamber two respectively. The chamber pressure can be read in real time, and the differential pressure analog quantity of the differential pressure signal can be directly obtained through the difference in readings, which improves the accuracy and intuitiveness of the detection and avoids misjudgment due to subjective judgment or lack of pressure display device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] In the diagram: 1 Interface 1, 2 Interface 2, 3 Fixing hole, 4 Support leg, 5 Connecting nozzle 1, 6 Detection block, 7 Plug, 8 Connecting nozzle 2, 9 Pressure gauge, 10 Handle, 11 Threaded rod, 12 Piston, 13 Piston chamber, 14 Pressure chamber 1, 15 Connecting pipe, 16 Sealing ring, 17 Pressure chamber 2, 18 Bracket. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0018] Please see Figure 1-2 This utility model provides a technical solution: an airborne differential pressure signaler pollution alarm detection fixture, including a detection block, a pressure chamber, a piston pressure regulating mechanism, a pipe interface, and a pressure display device, etc. The overall structure is compact and easy to carry and use for on-site testing.

[0019] The detection block 6 is an integral carrier body, which has two identical pressure chambers inside, namely pressure chamber one 14 and pressure chamber two 17, which are used as high pressure chamber and low pressure chamber respectively. Pressure chamber one 14 and pressure chamber two 17 are independent of each other, and are connected to two pressure gauges 9 through connecting pipes 15 to display the pressure value of each chamber in real time. The pressure difference between the two pressure chambers can be calculated from the direct reading difference of the pressure gauges, and is used to determine whether the action point of the differential pressure signal is normal.

[0020] The detection block 6 has a piston chamber 13 in the vertical direction, which is connected to the pressure chamber. A piston 12 is slidably installed in the piston chamber, and a sealing ring 16 is provided between the circumference of the piston and the chamber to ensure airtightness. The piston 12 is connected to the bracket 18 on the top of the detection block through a threaded rod 11, and a rotatable handle 10 is provided at the upper end of the threaded rod. By manually rotating the handle, the threaded rod is rotated, which in turn pushes the piston to move up and down in the piston chamber, thereby compressing or releasing the air in the pressure chamber and realizing pressure regulation. This pressure regulation method is manually driven and is suitable for test scenarios without an external air source.

[0021] Two connecting nozzles are provided on the side of the detection block 6, namely connecting nozzle 1 5 and connecting nozzle 2 8, both of which are connected to the pressure chamber. The connecting nozzles can be sealed by the plug 7 and can be connected to an external air source or the differential pressure signal to be measured as needed. Connecting nozzle 1 and connecting nozzle 2 can be used as air source interfaces for the high pressure chamber and the low pressure chamber, respectively. One of the connecting nozzles can be sealed for backup, and the other is used to connect to the pressure pump to meet different testing scenarios.

[0022] To achieve a standard interface connection with the differential pressure signal device under test, the front side of the detection block 6 is provided with interface 1 and interface 2, which are connected to pressure chamber 14 and pressure chamber 2 17 respectively. Interface 1 and interface 2 can be connected to the high pressure port and low pressure port of the differential pressure signal device respectively to complete the detection simulation of the differential pressure signal device's action point.

[0023] To enhance the stability and portability of the tooling, the bottom of the test block 6 is equipped with support legs 4, and each support leg has a fixing hole 3 at the bottom, which can be used to fix the tooling to the workbench with screws to prevent displacement during the test.

[0024] In practical use, different pressure regulation methods can be selected according to the site conditions: if there is no external pressure source, the handle can be rotated to drive the piston down and gradually increase the pressure chamber to realize manual testing of the differential pressure signal; if there is an external pressure pump, it can be connected to the pipeline nozzle and pressurized directly through the air source; by utilizing the switchability of the two pressure chambers, high and low pressure ports can be flexibly simulated to realize pollution alarm testing under differential pressure conditions.

[0025] This tooling has a reasonable structural design, flexible pressure adjustment method, and good sealing performance, making it suitable for on-site maintenance and functional testing of various airborne differential pressure signalers.

[0026] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A pollution alarm detection fixture for an airborne differential pressure signaler, comprising a detection block (6) and a pressure chamber, characterized in that: The pressure chamber is located inside the detection block (6). The vertical direction of the detection block (6) is provided with a piston chamber (13) that communicates with the pressure chamber. The inner wall of the piston chamber (13) is slidably connected with a piston (12). A threaded rod (11) is rotatably connected above the piston (12). The side of the detection block (6) is provided with a first connector (5) and a second connector (8) that communicate with the pressure chamber. A plug (7) is threadedly connected to the first connector (5) and the second connector (8). There are two pressure chambers, namely pressure chamber one (14) and pressure chamber two (17). The structures of pressure chamber one (14) and pressure chamber two (17) are the same. A pressure gauge (9) is provided on the detection block (6). There are two pressure gauges (9). The pressure gauges (9) are connected to pressure chamber one (14) and pressure chamber two (17) respectively through connecting pipes (15).

2. The airborne differential pressure signaler pollution alarm detection fixture according to claim 1, characterized in that: The top of the detection block (6) is provided with a bracket (18), which is threadedly connected to the threaded rod (11). The upper end of the threaded rod (11) is provided with a handle (10), and a sealing ring (16) is provided between the circumference of the piston (12) and the inner wall of the piston cavity (13).

3. The airborne differential pressure signaler pollution alarm detection fixture according to claim 1, characterized in that: The front side of the detection block (6) is provided with interface one (1) and interface two (2), which are connected to pressure chamber one (14) and pressure chamber two (17) respectively.

4. The airborne differential pressure signaler pollution alarm detection fixture according to claim 1, characterized in that: The lower surface of the detection block (6) is provided with a support leg (4), and the lower end of the support leg (4) is provided with a fixing hole (3).

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