A filter cartridge negative pressure testing apparatus

Abstract

The utility model discloses a filter cartridge negative pressure test equipment, including the organism, and the organism includes the workstation, and the workstation upper portion is fixed with the locating seat, and the locating seat top is equipped with the movable fender of being able to go up, and the fender side is connected with the joint, and the organism inside is installed with vacuum pump, first solenoid valve and pressure gauge, and vacuum pump, first solenoid valve, pressure gauge and joint are connected through the pipeline. The utility model discloses through vacuum pump to the pure water interface place draws the negative pressure and carries out the pressure conservation, and then through the observation on pressure gauge's numerical value, can show the pressure value of pure water and wastewater osmotic pressure, thereby judges whether the qualified.

Description

Technical Field

[0001] This utility model relates to filter cartridge testing equipment, and more specifically, to a filter cartridge negative pressure testing equipment. Background Technology

[0002] RO filter cartridges are an essential filtration component in water purifiers. RO filter cartridges typically have three ports: raw water inlet, pure water outlet, and wastewater outlet. Currently, after assembly, RO filter cartridges generally only undergo side leakage testing and do not perform osmotic pressure testing on pure water and wastewater. However, if the pressure between the wastewater and pure water in the RO filter cartridge is low, a "water leakage" phenomenon will occur, affecting its filtration effect. Therefore, there is an urgent need to design a testing device that can detect the osmotic pressure of pure water and wastewater. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a filter cartridge negative pressure testing device. After drawing negative pressure at the pure water interface using a vacuum pump and maintaining the pressure, the device can display the pressure values ​​of pure water and wastewater osmotic pressure by observing the values ​​on the pressure gauge, thereby determining whether the device is qualified.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a filter cartridge negative pressure testing device, comprising a body, the body comprising a worktable, a positioning seat fixed on the upper part of the worktable, a stop block that can move up and down above the positioning seat, a connector connected to the side of the stop block, and a vacuum pump, a first solenoid valve and a pressure gauge installed inside the body, the vacuum pump, the first solenoid valve, the pressure gauge and the connector being connected by pipelines.

[0005] Furthermore, a support plate is fixed inside the machine body. One end of the support plate is located above the workbench and a first cylinder is fixed there. The end of the telescopic rod of the first cylinder is fixedly connected to the stop block.

[0006] Furthermore, the stop block includes a venting groove with an open lower end, the connector is threadedly sealed to the stop block, and the connector communicates with the venting groove.

[0007] Furthermore, the ventilation groove has a step inside, and an annular sealing gasket is fixed at the bottom of the step.

[0008] Furthermore, a second cylinder is fixed to the lower part of the support plate, and an insert plate is fixed to the telescopic rod of the second cylinder. The insert plate is located between the positioning seat and the stop block.

[0009] Furthermore, the insert plate includes multiple clearance slots, the lower part of the stop block can be inserted into the clearance slots, and a limit block is fixed to the lower part of the insert plate.

[0010] In summary, this utility model has the following beneficial effects:

[0011] By using a vacuum pump to draw negative pressure at the pure water interface and then maintaining the pressure, the pressure values ​​of the pure water and wastewater osmotic pressure can be displayed by observing the value on the pressure gauge, thereby determining whether the filter cartridge is qualified. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0013] Figure 2 for Figure 1 A partial schematic diagram;

[0014] Figure 3 This is a side view of this embodiment;

[0015] Figure 4 This is a partial sectional view of this embodiment;

[0016] Figure 5 This is a schematic diagram of this embodiment.

[0017] Reference numerals: 1. Machine body; 11. Workbench; 12. Support plate; 2. Positioning seat; 3. First cylinder; 4. Stop block; 41. Vent groove; 42. Step; 5. Connector; 6. Insert plate; 61. Clearance groove; 62. Limit block; 7. Second cylinder; 8. Sealing gasket; 9. Filter cartridge; 91. Pure water interface; 100. Vacuum pump; 200. Safety valve; 300. Filter; 400. First solenoid valve; 500. Second solenoid valve; 600. Pressure gauge; 700. Pressure relief valve; 800. Silencer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 5 As shown, this embodiment discloses a filter cartridge negative pressure testing device, including a body 1. The body 1 includes a workbench 11, and a positioning seat 2 is fixed on the upper part of the workbench 11. A stop block 4 that can move up and down is provided above the positioning seat 2. Specifically, a support plate 12 is fixed inside the body 1. One end of the support plate 12 is located above the workbench 11 and a first cylinder 3 is fixed there. The end of the telescopic rod of the first cylinder 3 is fixedly connected to the stop block 4, and the stop block 4 can be moved up and down by the first cylinder 3.

[0020] like Figure 4As shown, the stop block 4 includes a venting groove 41 with an open lower end. The venting groove 41 has a step 42 inside, and an annular sealing gasket 8 is fixed at the lower part of the step 42. During operation, the filter cartridge 9 is placed on the positioning seat 2, and the filter cartridge 9 is positioned by the C-shaped protrusion on the upper part of the positioning seat 2. Then, the first cylinder 3 drives the stop block 4 to descend, and the pure water interface 91 of the filter cartridge 9 is inserted into the venting groove 41. The side wall of the pure water interface 91 is sealed to the venting groove 41 by a sealing ring, and the upper part of the pure water interface 91 abuts against the lower part of the sealing gasket 8. The double sealing method of sealing ring and sealing gasket 8 provides a good sealing effect and can greatly reduce the risk of leakage at this point.

[0021] The support plate 12 is fixed with a second cylinder 7 at its lower part. The extension rod of the second cylinder 7 is fixed with an insert plate 6. The insert plate 6 is located between the positioning seat 2 and the stop block 4. The insert plate 6 includes multiple clearance grooves 61. The lower part of the stop block 4 can be inserted into the clearance grooves 61. The lower part of the insert plate 6 is fixed with a limit block 62. There are three clearance grooves 61, which are used to avoid the raw water interface, wastewater interface and pure water interface 91 of the filter cartridge 9, respectively. In this embodiment, the distance between the three interfaces of the filter cartridge 9 is different. Therefore, after cooperating with the clearance grooves 61, it can play a "foolproof" role. After the filter cartridge 9 is placed, the limit block 62 can abut against the side of the filter cartridge 9, thereby effectively preventing the three interfaces of the filter cartridge 9 from contacting the clearance grooves 61.

[0022] like Figure 4 and Figure 5 As shown, a connector 5 is connected to the side of the baffle 4. The connector 5 is threadedly sealed to the baffle 4 and communicates with the venting groove 41. The connector 5 is L-shaped, which is existing technology. A vacuum pump 100, a first solenoid valve 400, and a pressure gauge 600 are installed inside the body 1. The vacuum pump 100, the first solenoid valve 400, the pressure gauge 600, and the connector 5 are connected by pipelines. The vacuum pump 100 draws negative pressure at the pure water interface 91 and then maintains the pressure. By observing the value on the pressure gauge 600, the pressure values ​​of the pure water and wastewater osmotic pressure can be displayed, thereby determining whether the filter cartridge 9 is qualified.

[0023] For example, the inlet pressure of the RO membrane in filter cartridge 9 is 0.5 MPa, and the rated osmotic pressure of wastewater and pure water is between 70 kPa and 80 kPa (if the osmotic pressure is too high, it will be difficult to backwash the RO membrane to discharge wastewater; if it is too low, it will cause cross-contamination between pure water and wastewater). During the test, the test pressure of vacuum pump 100 is controlled at 90 kPa (far less than the inlet pressure of the RO membrane), which is equivalent to the pipeline pressure from the RO membrane to vacuum pump 100 being 90 kPa. The pressure is maintained for one minute. Since the wastewater interface is connected to the outside, if the osmotic pressure between wastewater and pure water is less than 90 kPa during the pressure maintenance process, the pipeline pressure from the RO membrane to vacuum pump 100 will drop until it reaches the osmotic pressure value between wastewater and pure water. At this time, observe whether the value on pressure gauge 600 is within the range of 70 kPa-80 kPa. If it is within this range, filter cartridge 9 is qualified; if it is not within this range, filter cartridge 9 is unqualified.

[0024] like Figure 5 As shown, this embodiment has two workstations, which can simultaneously perform negative pressure tests on two filter cartridges 9. A safety valve 200 and a filter 300 are connected between the first solenoid valve 400 and the vacuum pump 100. The filter 300 is used to filter impurities in the pipeline. Each workstation is equipped with a second solenoid valve 500 and a pressure gauge 600. The first solenoid valve 400 is used to control the opening and closing of the main pipeline, and the second solenoid valve 500 is used to control the opening and closing of the pipeline of a single workstation. At each workstation, a pressure relief valve 700 and a silencer 800 are also connected through pipelines. After the test is completed, the pressure needs to be released through the pressure relief valve 700 before the filter cartridge 9 can be removed. The gas released by the pressure relief valve 700 is discharged to the outside after passing through the silencer 800. By setting the silencer 800, the sound of the gas discharge can be reduced.

[0025] Among them, the vacuum pump 100, safety valve 200, filter 300, first solenoid valve 400, second solenoid valve 500, pressure gauge 600, pressure relief valve 700 and silencer 800 are all existing technologies. In this embodiment, these components are connected by pipelines to realize negative pressure testing of filter cartridge 9.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A filter cartridge negative pressure testing device, characterized in that, The machine includes a body (1), which includes a worktable (11). A positioning seat (2) is fixed on the upper part of the worktable (11). A stop (4) that can move up and down is provided above the positioning seat (2). A connector (5) is connected to the side of the stop (4). A vacuum pump (100), a first solenoid valve (400), and a pressure gauge (600) are installed inside the machine body (1). The vacuum pump (100), the first solenoid valve (400), the pressure gauge (600), and the connector (5) are connected by pipelines.

2. The filter cartridge negative pressure testing device according to claim 1, characterized in that, The machine body (1) has a support plate (12) fixed inside. One end of the support plate (12) is located above the workbench (11), and a first cylinder (3) is fixed at the support plate (12). The end of the telescopic rod of the first cylinder (3) is fixedly connected to the stop block (4).

3. The filter cartridge negative pressure testing device according to claim 1, characterized in that, The stop block (4) includes a venting groove (41) with an open lower end. The connector (5) is threadedly sealed to the stop block (4) and communicates with the venting groove (41).

4. The filter cartridge negative pressure testing device according to claim 3, characterized in that, The ventilation groove (41) has a step (42) inside, and an annular sealing gasket (8) is fixed at the lower part of the step (42).

5. The filter cartridge negative pressure testing device according to claim 2, characterized in that, The second cylinder (7) is fixed at the lower part of the support plate (12), and the insert plate (6) is fixed at the telescopic rod of the second cylinder (7). The insert plate (6) is located between the positioning seat (2) and the stop block (4).

6. The filter cartridge negative pressure testing device according to claim 5, characterized in that, The insert plate (6) includes multiple clearance slots (61), the lower part of the stop block (4) can be inserted into the clearance slots (61), and the lower part of the insert plate (6) is fixed with a limit block (62).

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