Pressure adjusting device of portable self-connection filtering pressure reducing valve

Abstract

The utility model discloses a pressure adjusting device of a portable self-connection filtering pressure reducing valve. The pressure adjusting device comprises a base, a left air cylinder, a right air cylinder, an interface assembly, a plugging part, an air cylinder control switch, a test control switch and a pressure detection device, the left air cylinder and the right air cylinder are respectively arranged on two different sides of the base; the air source is connected with the left air cylinder and the right air cylinder through the air cylinder control switch; the air source is connected with the left air cylinder through the test control switch; the left air cylinder is connected with the plugging part through the connector assembly, and the right air cylinder is connected with the plugging part through the connector assembly. And the right air cylinder is connected with the pressure detection device. According to the working principle of the filter pressure-reducing valve, the hose, the base left air cylinder, the base right air cylinder, the interface assembly, the plugging part, the air cylinder control switch, the test control switch and the pressure detection device are designed, so that the pressure adjustment and inspection of the filter pressure-reducing valve do not need to be carried out on a specified comprehensive test bed test, the pressure adjustment is more convenient, and the test efficiency is improved. And the inspection time can be reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of filter pressure reducing valve adjustment device, specifically relating to a portable self-connecting filter pressure reducing valve pressure adjustment device. Background Technology

[0002] In the air supply systems of various Guangzhou Metro train models, filter pressure reducing valves are widely used, such as in the pantograph air supply system, collector shoe air supply system, and wind whistle and coupler air supply systems. These valves act as pre-filters and pressure reducers for each air supply system, protecting them. As pressure-reducing components, they need to reduce the main duct pressure from 900 kPa to the required pressure (500–700 kPa) for each system. The spare filter pressure reducing valves used have an adjustable output pressure of 0–1050 kPa. Before installation and use, the filter pressure reducing valves must be adjusted and inspected on a comprehensive test bench at a designated location.

[0003] Currently, before installation, the filter pressure reducing valves of Guangzhou Metro need to be tested on a comprehensive test bench at a designated location. Before the test, a hose with a threaded connector is used to connect the air lines at both ends of the pressure reducing valve. One end is connected to the hose, and the other end is connected to a pressure gauge. The output pressure of the pressure reducing valve is adjusted according to the pressure displayed on the pressure gauge. Moreover, the air line interfaces at both ends of different models of filter pressure reducing valves are not the same. The interfaces include 1 / 4 inch (2 points) tapered, 1 / 4 inch (2 points) straight, etc. Multiple sets of connectors and hoses need to be prepared when connecting the air lines, which is complicated. Therefore, each test requires manual connection and disconnection of the threaded connectors at a specific test bench, resulting in a long test cycle and low testing efficiency. Utility Model Content

[0004] To overcome the above-mentioned technical defects, this utility model provides a pressure adjustment device for a portable self-connecting filter pressure reducing valve, which can reduce inspection time.

[0005] This utility model is achieved through the following solution:

[0006] A pressure adjustment device for a portable self-connecting filter pressure reducing valve includes: a base, a left air cylinder, a right air cylinder, an interface assembly, a sealing component, an air cylinder control switch, a test control switch, and a pressure detection device;

[0007] The left air cylinder and the right air cylinder are respectively disposed on different sides of the base;

[0008] The air source is connected to the left air cylinder and the right air cylinder via the air cylinder control switch;

[0009] The air source is connected to the left air cylinder via the test control switch;

[0010] The left air cylinder is connected to the sealing component through the interface assembly, and the right air cylinder is connected to the sealing component through the interface assembly;

[0011] The right air cylinder is connected to the pressure detection device.

[0012] As a further improvement of this utility model, the base includes: a left placement seat, a right placement seat, and a connecting plate;

[0013] The left placement seat and the right placement seat are connected by the connecting plate.

[0014] As a further improvement of this utility model, the connecting plate is provided with a first through hole.

[0015] As a further improvement of this utility model, the base also includes: a vertical plate, wherein the left air cylinder and the right air cylinder are each provided with the vertical plate on the side near the connecting plate, and the vertical plate is provided with a second through hole at the height of the sealing component.

[0016] As a further improvement of this utility model, the interface component includes: a piston rod air passage connector and a pagoda connector;

[0017] The piston rod of the left air cylinder is connected to the piston rod air passage connector at the front end. The piston rod air passage connector, the pagoda connector, and the sealing component are connected in sequence. One side of the piston rod of the left air cylinder is connected to the air source, and the other end is connected to the test control switch.

[0018] The piston rod of the right air cylinder is connected to the piston rod air passage connector at the front end. The piston rod air passage connector, the pagoda connector, and the sealing component are connected in sequence. One side of the piston rod of the right air cylinder is connected to the air source, and the other end is connected to the pressure detection device.

[0019] As a further improvement of this utility model, the sealing component is a conical rubber plug.

[0020] As a further improvement of this utility model, the pressure detection device is a pressure gauge.

[0021] As a further improvement of this utility model, it also includes a tooling box, in which the base, the left air cylinder, the right air cylinder, the interface assembly, the sealing component, the air cylinder control switch, the test control switch and the pressure detection device are all placed.

[0022] As a further improvement of this utility model, the air source is connected to the air cylinder control switch and the test control switch via a hose;

[0023] The air cylinder control switch is connected to the right air cylinder via a hose, and the test control switch is connected to the left air cylinder via a hose.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: Based on the working principle of the filter pressure reducing valve, this utility model designs a hose, a base, a left air cylinder, a right air cylinder, an interface assembly, a sealing component, an air cylinder control switch, a test control switch, and a pressure detection device. This eliminates the need for pressure adjustment and inspection of the filter pressure reducing valve on a designated comprehensive test bench, making pressure adjustment more convenient and reducing inspection time. To meet the needs of different interfaces of the filter pressure reducing valve and achieve the purpose of quick connection of the air circuit, the air circuit is not connected by a threaded connection. Instead, a device is designed to connect the sealing component to the air circuit of the valve body, overcoming the inconsistencies in threaded interface structures and the requirement for manual installation of threaded joints. This enables rapid testing of the filter pressure reducing valve of Guangzhou Metro vehicles. Attached Figure Description

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram illustrating the working principle of a filter pressure reducing valve.

[0027] Figure 2 This is a schematic diagram of the overall structure of the pressure adjustment device described in this utility model;

[0028] Figure 3 This is a schematic diagram of the air circuit of the pressure adjustment device described in this utility model;

[0029] Explanation of reference numerals in the attached drawings: 1. Hoses; 2. Base; 21. Left placement seat; 22. Right placement seat; 23. Connecting plate; 231. First through hole; 24. Vertical plate; 241. Second through hole; 3. Left air cylinder; 4. Right air cylinder; 5. Interface assembly; 51. Piston rod air passage connector; 52. Pagoda connector; 6. Sealing component; 7. Air cylinder control switch; 8. Test control switch; 9. Pressure detection device; 100. Filter pressure reducing valve; 200. Air source. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0033] like Figure 1 As shown, the working principle of the filter pressure reducing valve needs to be introduced first: Compressed air enters the filter pressure reducing valve from port P1, flows through the filter cup, enters the air passage in the middle of the valve body through the filter, and is discharged from port P2 after pressure regulation. A pressure display gauge is connected at the outlet P2, and the pressure is adjusted to the required value according to the pressure at the outlet P2.

[0034] This utility model provides a pressure adjustment device for a portable self-connecting filter pressure reducing valve 100, such as... Figure 2 and Figure 3 As shown, it includes: a hose 1, a base 2, a left air cylinder 3, a right air cylinder 4, an interface assembly 5, a sealing component 6, an air cylinder control switch 7, a test control switch 8, and a pressure detection device 9; the left air cylinder 3 and the right air cylinder 4 are respectively located on different sides of the base 2; the hose 1 is connected to the left air cylinder 3 and the right air cylinder 4 through the air cylinder control switch 7; the hose 1 is connected to the left air cylinder 3 through the test control switch 8; the left air cylinder 3 is connected to the sealing component 6 through the interface assembly 5, and the right air cylinder 4 is connected to the sealing component 6 through the interface assembly 5; the right air cylinder 4 is connected to the pressure detection device 9.

[0035] The air source 200 can draw compressed air (greater than 750 kPa) from the main air duct of the GS valve on the subway train or from a mobile air compressor. The airflow is divided into two paths after passing through the air cylinder control switch 7. One path goes through the test control switch 8 to the left air cylinder 3, which controls the drive air cylinder to perform extension and retraction. The other path goes to the pressure test passage and, after passing through the plug switch of the right air cylinder 4, becomes the input air pressure of the filter pressure reducing valve 100P1.

[0036] Air source 200 is connected to air cylinder control switch 7 and test control switch 8 via hose 1. Hose 1 is a 6mm / 8mm hose, and air source 200 is connected to hose 1 via an air source 200 connector. Air cylinder control switch 7 is connected to right air cylinder 4 via hose 1, and test control switch 8 is connected to left air cylinder 3 via hose 1. To meet the needs of using the G / S valve air source 200 in subway trains and the air source 200 in mobile air compressors, three types of air source 200 connectors are provided: G / S valve plug, Staubli quick plug, and universal quick plug. Hose 1 and connectors have a working pressure greater than 1200 kPa and an instantaneous burst pressure of 3000 kPa, meeting on-site requirements. The normal output air pressure of trains and mobile air compressors is approximately 900-1000 kPa.

[0037] The air cylinder adopts a short-stroke, high-thrust pneumatic cylinder (SC63-25). At a pressure of 700-900 kPa, the theoretical thrust is about 145-187 kg. The filter pressure reducing valve 100 interface is a circle with a diameter of about 12 mm. At a pressure of 700-900 kPa, the theoretical thrust is about 78-101 kg. The cylinder thrust is greater than the reaction force, which meets the sealing requirements for non-threaded connections.

[0038] Furthermore, the base 2 includes: a left placement seat 21, a right placement seat 22, and a connecting plate 23; the left placement seat 21 and the right placement seat 22 are connected by the connecting plate 23.

[0039] The connecting plate 23 is provided with a first through hole 231, which serves as a test position for the filter pressure reducing valve 100 and allows the filter pressure reducing valve 100 to pass through during use.

[0040] The base 2 also includes a vertical plate 24. Both the left and right air cylinders 3 and 4 have a vertical plate 24 on their side near the connecting plate 23. The vertical plate 24 has a second through hole 241 at the height of the sealing component 6, allowing the piston rods of the two air cylinders to pass through during use. The dimensions of the base 2 can be designed according to the diameter and dimensions of the filter pressure reducing valve 100 to ensure that the two piston rods remain horizontal and concentric with the air passage of the filter pressure reducing valve 100.

[0041] Interface component 5 includes: piston rod air passage connector 51 and pagoda connector 52; the piston rod front end of the left air cylinder 3 is connected to piston rod air passage connector 51, piston rod air passage connector 51, pagoda connector 52 and sealing component 6 are connected in sequence, one side of the piston rod of the left air cylinder 3 is connected to hose 1, and the other end is connected to test control switch 8; the piston rod front end of the right air cylinder 4 is connected to piston rod air passage connector 51, piston rod air passage connector 51, pagoda connector 52 and sealing component 6 are connected in sequence, one side of the piston rod of the right air cylinder 4 is connected to hose 1, and the other end is connected to pressure detection device 9.

[0042] The sealing component 6 is a conical rubber plug. The air cylinder control switch 7 controls the left air cylinder 3 and the right air cylinder 4 to operate simultaneously. The piston rods of the air cylinders extend simultaneously, and the conical rubber plug at the front end forms a sealing plug. The piston rod pressure causes the sealing plug to act on the P1 and P2 ports of the filter pressure reducing valve 100, connecting the valve body's air passage. The sealing component 6 overcomes the problems of inconsistent threaded interface structures and the need for manual installation of threaded joints.

[0043] Based on the input and output port dimensions of the pressure reducing valve (2 points / approximately 12mm) and the piston rod dimensions of the air cylinder (16mm), a conical sealing plug with a bottom diameter of 21mm and a 3-point pagoda connector 52 are selected.

[0044] The pressure detection device 9 is a pressure gauge, which is connected to the outlet of the entire device. The output pressure of the filter pressure reducing valve 100 is adjusted according to the pressure displayed on the pressure gauge until it meets the usage requirements. Considering that the pressure adjustment range of the filter pressure reducing valve 100 is 0-1050 kPa, and the required pressure is 500-700 kPa, a pressure gauge with a range of 0-1000 kPa is selected. The pressure gauge must be inspected and certified before use.

[0045] In addition, this utility model also includes a tooling box, in which the hose 1, base 2, left air cylinder 3, right air cylinder 4, interface assembly 5, sealing component 6, air cylinder control switch 7, test control switch 8 and pressure detection device 9 are all placed. The entire device is small in size and light in weight, making it easy to carry and simplifying the repair process, eliminating the need to send it to a specific test bench for testing; at the same time, there is an installation indicator arrow for the filter pressure reducing valve 100 on the panel of the tooling box.

[0046] The present invention will be further explained below with reference to the specific operation process:

[0047] 1. Take the pressure adjustment device, drag it to the corresponding air source 200 position, lay the tooling box flat, open the tooling box, and take out the hose 1.

[0048] 2. Based on the on-site gas source 200, select a suitable connector to connect to the gas source 200, and ensure that the gas pressure of the gas source 200 is greater than 750 kPa (the output pressure of the filter pressure reducing valve 100 is required to be 500-700 kPa).

[0049] 3. Place the filter pressure reducing valve 100 to be tested in the test position, and pay attention to the direction of the arrow on the valve body. Also, make sure that the direction of the arrow on the valve body is consistent with the direction of the arrow on the tooling box panel.

[0050] 4. Operate the air cylinder control switch 7 and turn it to the "close" position. This will cause the piston rods of the two cylinders to be pushed out, and at the same time, the seal installed at the front end of the piston rod will block the input and output ports of the filter pressure reducing valve 100.

[0051] 5. Operate the test control switch 8 and turn it to the "ON" position so that compressed air enters the filter pressure reducing valve 100 P1 port from the middle air passage of the piston rod of the left air cylinder 3. After passing through the filter at the bottom of the filter pressure reducing valve 100, the air is output to the P2 port through the pressure adjustment device and output to the pressure gauge from the middle air passage of the piston rod of the right air cylinder 4.

[0052] 6. If air leakage occurs after the test air circuit is connected, operate the air cylinder control switch 7 and turn it to the "disengage" position to disengage the piston rod from the valve body. Remove the valve body and confirm whether the valve body direction mark is consistent with the panel mark. Reposition the filter pressure reducing valve 100 stably and repeat steps 4 and 5.

[0053] 7. Press the pressure display button on the pressure gauge to display the current output pressure of the filter pressure reducing valve 100.

[0054] 8. If the displayed pressure is not the required pressure, lift the adjusting cap and simultaneously rotate the adjusting cap left or right according to the pressure displayed on the pressure gauge to adjust the pressure to the required value.

[0055] 9. After the pressure is adjusted to the correct position, repeatedly test the on / off state of control switch 8 to ensure that the pressure gauge displays a stable pressure as required.

[0056] 10. Operate the air cylinder control switch 7 and turn it to the "disengage" position to disengage the piston rod from the valve body. Remove the valve body, reset the air cylinder control switch 7 and the test control switch 8, and end the pressure adjustment test.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressure adjustment device for a portable self-connecting filter pressure reducing valve, characterized in that, include: Base, left air cylinder, right air cylinder, interface assembly, sealing component, air cylinder control switch, test control switch, and pressure detection device; The left air cylinder and the right air cylinder are respectively disposed on different sides of the base; The air source is connected to the left air cylinder and the right air cylinder via the air cylinder control switch; The air source is connected to the left air cylinder via the test control switch; The left air cylinder is connected to the sealing component through the interface assembly, and the right air cylinder is connected to the sealing component through the interface assembly; The right air cylinder is connected to the pressure detection device.

2. The pressure regulating device according to claim 1, characterized in that, The base includes: a left placement seat, a right placement seat, and a connecting plate; The left placement seat and the right placement seat are connected by the connecting plate.

3. The pressure adjusting device according to claim 2, characterized in that, The connecting plate is provided with a first through hole.

4. The pressure adjusting device according to claim 2, characterized in that, The base also includes a vertical plate. The left and right air cylinders are each provided with the vertical plate on the side near the connecting plate. The vertical plate is provided with a second through hole at the height of the sealing component.

5. The pressure regulating device according to claim 1, characterized in that, The interface components include: piston rod pneumatic connector and pagoda connector; The piston rod of the left air cylinder is connected to the piston rod air passage connector at the front end. The piston rod air passage connector, the pagoda connector, and the sealing component are connected in sequence. One side of the piston rod of the left air cylinder is connected to the air source, and the other end is connected to the test control switch. The piston rod of the right air cylinder is connected to the piston rod air passage connector at the front end. The piston rod air passage connector, the pagoda connector, and the sealing component are connected in sequence. One side of the piston rod of the right air cylinder is connected to the air source, and the other end is connected to the pressure detection device.

6. The pressure regulating device according to claim 5, characterized in that, The sealing component is a conical rubber plug.

7. The pressure adjusting device according to claim 1, characterized in that, The pressure detection device is a pressure gauge.

8. The pressure regulating device according to claim 1, characterized in that, It also includes a tooling housing, in which the base, the left air cylinder, the right air cylinder, the interface assembly, the sealing component, the air cylinder control switch, the test control switch, and the pressure detection device are all placed.

9. The pressure regulating device according to claim 1, characterized in that, The air source is connected to the air cylinder control switch and the test control switch via a hose; The air cylinder control switch is connected to the right air cylinder via a hose, and the test control switch is connected to the left air cylinder via a hose.

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