Adjustable multi-purpose filter pressure drop test tool

Abstract

The utility model discloses an adjustable multi -purpose filter pressure drop test frock belongs to filter test equipment technical field. The frock includes casing, connector and pull rod subassembly, and the casing upper end is open structure, and the connector is with casing screw thread connection, and the casing side is equipped with import, and the connector upper end is equipped with export. Pull rod subassembly is located in the casing, and includes lower pull rod and upper pull rod, and lower pull rod upper end inserts into upper pull rod, and is fixed through adjusting screw and long hole structure, and the adjustable mounting cavity is formed between both, is used for adapting different specifications filter. Upper pull rod upper portion is equipped with joint part, and the joint part is equipped with sealing washer, and the sealing washer is equipped with convex ring and inserts into the annular groove of joint part, realizes the sealing to filter export end. Lower pull rod bottom is equipped with pad, and is through long screw force and is tightly sealed washer with filter. The utility model has structure adjustable, and the advantages such as reliable sealing, strong adaptability, can effectively promote pressure drop test efficiency and application scope.

Description

Technical Field

[0001] This utility model relates to the field of filter pressure drop testing technology, specifically an adjustable multi-purpose filter pressure drop testing fixture. Background Technology

[0002] Filters (such as air filters and fuel filters) exhibit varying pressure drop characteristics during use due to differences in their internal structure, filter media properties, and fluid flow rates. Pressure drop is a crucial indicator of filter performance, affecting parameters such as system energy consumption, flow stability, and lifespan. Therefore, pressure drop performance testing is necessary during production inspection and research and development.

[0003] In existing technologies, filter pressure drop testing typically relies on customized test fixtures. Specifically, to accommodate the differences in size, interface, and installation methods among different filter models, dedicated fixtures are often manufactured for each filter specification. Such test devices typically feature a fixed design, including fixed internal cavity dimensions, specific sealing components, and a rigid clamping mechanism, with a structure closely corresponding to the target filter.

[0004] However, existing pressure drop testing fixtures generally suffer from poor versatility, weak adaptability, and difficulty in adjusting the seals. Different specifications of filters require dedicated fixtures, leading to equipment duplication, resource waste, and cumbersome replacement. When testing filters with slightly different dimensions, quick adaptation cannot be achieved through simple adjustments. Furthermore, the sealing structure is mostly fixed or adhesive, making it difficult to replace the gasket, which can easily cause leakage, affecting the accuracy of test results and resulting in low overall operational efficiency.

[0005] Therefore, there is an urgent need for a universal pressure drop test fixture with adjustable structure, reliable sealing, and compatibility with various filter specifications to improve testing convenience, accuracy, and equipment utilization. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the existing defects and provide an adjustable multi-purpose filter pressure drop test fixture. Through the combination structure of upper and lower pull rods and the cooperation of adjusting screws and elongated holes, the height of the mounting cavity can be adjusted, which can adapt to the installation requirements of filters of different specifications, significantly improve the versatility of the test fixture, avoid the problem of configuring special fixtures for different filter models, reduce equipment costs, improve testing efficiency, and effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adjustable multi-purpose filter pressure drop test fixture, comprising a housing, a connector, and a pull rod assembly. The upper end of the housing is an open structure, and the connector is connected to the upper end of the housing. The pull rod assembly is disposed within the housing and includes a lower pull rod and an upper pull rod. The upper end of the lower pull rod is inserted into the upper pull rod, and the two are fixed together by an adjusting screw. A mounting cavity for fixing the filter is formed between the lower pull rod and the upper pull rod. The distance between the lower pull rod and the upper pull rod can be adjusted by loosening the adjusting screw. That is, by adjusting the tightening position of the adjusting screw, it can accommodate the fixing of filters of different specifications, achieving universality of the pressure drop test fixture and improving efficiency. To enhance the practicality of this device, the upper part of the pull rod is equipped with a connector, which is threaded to the connector head. A sealing ring is installed between the two, which secures the pull rod assembly, thus securing the filter within the housing. This method is convenient and meets the requirements of pressure drop testing. A sealing gasket is installed on the inner surface of the connector, which seals the filter outlet. To accommodate filters of different specifications, the pressure drop testing fixture can be universally used simply by replacing the sealing gasket, while ensuring reliable sealing. A raised ring is installed on the upper surface of the sealing gasket, which is embedded in the annular groove of the connector. This eliminates the need for adhesive to the sealing gasket, facilitating the replacement of sealing gaskets of different specifications.

[0008] Furthermore, the housing and the connector are connected by threads, and a sealing ring is provided at the connection. The housing has an inlet on its side, and the connector has an outlet at its upper end.

[0009] Furthermore, the connector, joint, and sealing gasket are concentric. The lower surface of the joint is provided with screw holes, and the sealing gasket can be fixed to the joint with screws according to the actual size of the sealing gasket.

[0010] Furthermore, elongated holes are provided on the connecting surfaces of the pull rod and the upper pull rod, and adjusting screws are passed through the elongated holes to fix the pull rod and the upper pull rod.

[0011] Furthermore, a pad is provided on the inner bottom surface of the pull rod to support the lower end of the filter. A long screw is provided below the pull rod, and the upper end of the long screw passes through the pull rod and connects to the pad. By tightening the long screw, the upper end of the long screw abuts against the filter through the pad, thereby firmly fixing the filter and pressing the sealing gasket to achieve a reliable seal, prevent leakage, and ensure accurate pressure drop test results.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves flexible adjustment of the installation cavity height through the adjustable connection structure between the upper and lower pull rods. The lower pull rod and the upper pull rod are provided with an adjusting screw and an elongated hole structure, which allows users to quickly adjust the installation space according to the height and structural size of the filter, thereby adapting to different models and sizes of filters. It achieves the goal of universality that one tooling can support the testing of multiple product specifications, reducing equipment investment and replacement frequency, and is particularly suitable for the R&D stage or multi-category production testing scenarios.

[0013] 2. In terms of sealing structure, this device innovatively adopts a sealing design that combines a replaceable sealing gasket with an embedded groove; the sealing gasket is provided with a raised ring, which can be directly embedded into the annular groove inside the joint, without the need for adhesive or screw fixation, making it convenient for disassembly and replacement.

[0014] 3. The overall structure of this utility model is compact and easy to operate; the tie rod assembly is connected to the housing through the threaded joint, and the double sealing ring design improves the assembly stability and sealing performance; the pad and long screw structure at the bottom can apply axial clamping force to the filter after adjustment, effectively preventing displacement and loosening, further enhancing the sealing effect and ensuring the stability and reliability of the test process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1 long screw, 2 pad, 3 pull rod, 4 adjusting screw, 5 sealing gasket, 6 convex ring, 7 screw hole, 8 connector, 9 outlet, 10 connector, 11 sealing ring one, 12 sealing ring two, 13 pull rod, 14 inlet, 15 housing, 16 long hole. 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.

[0018] Please see Figure 1This utility model provides a technical solution: an adjustable multi-purpose filter pressure drop test fixture, including a housing 15, a connector 10, and a pull rod assembly; the upper end of the housing 15 is an open structure, and the connector 10 is connected to the upper end of the housing 15 by means of threads, and a sealing ring 11 is provided at the connection to enhance the sealing performance; an inlet 14 is provided on the side of the housing 15 for introducing test airflow or liquid; an outlet 9 is provided at the upper end of the connector 10 for connecting to a pressure drop test system.

[0019] The pull rod assembly is located inside the housing 15 and includes a lower pull rod 3 and an upper pull rod 13. The upper end of the lower pull rod 3 is inserted into the upper pull rod 13. An elongated hole 16 is provided on the connecting surface of the two. An adjusting screw 4 passes through the elongated hole 16 to fix the two together. By adjusting the position of the adjusting screw 4 in the elongated hole 16, the distance between the lower pull rod 3 and the upper pull rod 13 can be adjusted to form an installation cavity for adapting to filters of different heights, thereby improving the versatility of the device.

[0020] The inner bottom surface of the pull rod 3 is provided with a pad 2, which is used to support the lower end of the filter. A long screw 1 is also provided below the pull rod 3. The upper end of the long screw 1 passes through the pull rod 3 and connects to the pad 2. By tightening the long screw 1, its upper end is pressed against the filter through the pad 2, so as to achieve stable fixation of the filter and further press the upper sealing gasket 5 to ensure the sealing effect, prevent fluid leakage, and ensure the accuracy of pressure drop test data.

[0021] The upper part of the upper pull rod 13 is provided with a connector 8, which is connected to the connector 10 by a thread. A sealing ring 12 is provided at the connection to achieve sealing and fixation between the pull rod assembly and the connector. The inner surface of the connector 8 is provided with a replaceable sealing gasket 5 to form a sealing contact with the filter outlet end. The upper surface of the sealing gasket 5 is provided with a raised ring 6, which is embedded in the annular groove inside the connector 8 to form a self-locking structure, preventing sliding or displacement, and eliminating the need for adhesive or screw fixation. This facilitates the replacement of sealing gaskets 5 of different specifications, thereby adapting to different filter models and improving the versatility of the tooling.

[0022] To further enhance the stability of the connection between the gasket and the connector, the lower surface of the connector 8 may also be provided with screw holes 7. Depending on the specific size of the gasket 5, the gasket 5 can be screwed to the connector 8, which is suitable for application scenarios that require enhanced connection force. In the entire structure, the connector 10, the connector 8 and the gasket 5 are arranged coaxially, which helps to maintain the symmetry of the fluid channel and improve the stability and accuracy of the test process.

[0023] This utility model utilizes the insertion structure of the pull-down rod 3 and the pull-up rod 13, along with the adjusting screw 4 and the elongated hole 16, to form a height-adjustable mounting cavity, thus adapting to filters of different specifications. When replacing the filter, simply loosen the adjusting screw 4 and move the pull-down rod 3 to change the cavity height to meet installation requirements. After the filter is placed, the pad 2 located at the bottom of the pull-down rod 3 exerts upward force under the action of the elongated screw 1, pressing the upper end of the filter tightly against the sealing gasket 5, achieving stable support and effective sealing. The sealing gasket 5 is provided with a protruding ring 6, which is embedded in the connector 8. The annular groove allows for positioning and fixation without adhesive, improving replacement efficiency. The connector 8 is connected to the connector 10 via a threaded connection, and a second sealing ring 12 is provided at the joint to ensure sealing performance. The housing 15 is also threaded to the connector 10, and the sealing ring 11 enhances the sealing performance. During testing, the fluid enters from the inlet 14 on the side of the housing 15, passes through the filter installed in the tie rod assembly, and exits from the outlet 9 at the top of the connector 10. The pressure difference can be measured before and after the fluid passes through the filter, thus completing the pressure drop performance test.

[0024] The pressure drop test fixture provided by this utility model has a compact structure, is easy to operate, is flexible in adjustment, and has strong adaptability. It can effectively solve the problems of poor versatility and difficulty in replacing the sealing structure in the existing technology. It is widely applicable to pressure drop performance testing scenarios of various types of filters in laboratory testing, product inspection, and R&D stages.

[0025] 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. An adjustable multi-purpose filter pressure drop testing fixture, comprising a housing (15), a connector (10), and a pull rod assembly, characterized in that: The upper end of the housing (15) is an open structure. The connector (10) is connected to the upper end of the housing (15). The pull rod assembly is set in the housing (15). The pull rod assembly includes a lower pull rod (3) and an upper pull rod (13). The upper end of the lower pull rod (3) is inserted into the upper pull rod (13). The two are fixed by adjusting screws (4). The lower pull rod (3) and the upper pull rod (13) form an installation cavity for fixing the filter. The upper part of the upper pull rod (13) is provided with a connector (8). The connector (8) is threadedly connected to the connector (10). A sealing ring (12) is provided between the two. A sealing gasket (5) is provided on the inner surface of the connector (8). A convex ring (6) is provided on the upper surface of the sealing gasket (5). The convex ring (6) is embedded in the annular groove of the connector (8).

2. The adjustable multi-purpose filter pressure drop test fixture according to claim 1, characterized in that: The housing (15) and the connector (10) are connected by threads, and a sealing ring (11) is provided at the connection. The side of the housing (15) is provided with an inlet (14), and the upper end of the connector (10) is provided with an outlet (9).

3. The adjustable multi-purpose filter pressure drop test fixture according to claim 1, characterized in that: The connector (10), the joint (8), and the sealing gasket (5) are concentric, and the lower surface of the joint (8) is provided with screw holes (7).

4. The adjustable multi-purpose filter pressure drop test fixture according to claim 1, characterized in that: The connecting surfaces of the pull rod (3) and the pull rod (13) are respectively provided with elongated holes (16), and the adjusting screw (4) passes through the elongated holes (16) to fix the pull rod (3) and the pull rod (13).

5. The adjustable multi-purpose filter pressure drop test fixture according to claim 1, characterized in that: A pad (2) is provided on the inner bottom surface of the pull rod (3). The pad (2) is used to support the lower end of the filter. A long screw (1) is provided below the pull rod (3). The upper end of the long screw (1) passes through the pull rod (3) and connects to the pad (2).

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