Air tightness testing machine for ro film

Abstract

The utility model discloses an air tightness testing machine for a ro membrane, which comprises a household ro membrane filter sealing jig, a position sensor, a vacuum pump, an air storage tank, an electromagnetic valve for controlling air suction and supply, an air pipe communicated between the sealing jig and the vacuum pump, and a negative pressure meter communicated in the air pipe, the sealing jig is matched with a central pipe of the household ro membrane filter in an inserted connection mode and is matched with the central pipe in a pressed and sealed mode through a sealing ring arranged on the outer ring of the central pipe in a sleeved mode, the position sensor is arranged on the lower portion of the sealing jig, the vacuum pump exhausts air in the household ro membrane filter to form a negative pressure environment, and whether the correspondingly detected household ro membrane filter meets the sealing performance requirement or not is judged according to the air pressure value. By means of a plurality of sealing jigs and a plurality of electromagnetic valves, asynchronous detection procedures are carried out on a plurality of to-be-detected household ro membrane filters, and the gas storage tank is used for collecting and storing gas, so that the internal gas pressure of the to-be-detected household ro membrane filters and the gas pipe is quickly recovered, the detection efficiency is improved, and the product quality is fully ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automation, in particular to a RO membrane airtightness testing machine. Background Art

[0002] RO membrane, also known as reverse osmosis membrane, is a membrane material used in the field of water purification and filtration. Reverse osmosis technology is a membrane separation and filtration technology that uses osmotic pressure difference as the driving force. Under a certain pressure, water molecules can pass through the RO membrane, while inorganic salts, heavy metal ions, organic matter, colloids, bacteria, viruses and other impurities in the source water cannot pass through the RO membrane, thereby strictly distinguishing between pure water that can pass through and concentrated water that cannot pass through. Most household RO membranes are wound into a cylinder and are implemented through a booster pump to achieve the effect of water purification and filtration. In order to ensure that the air tightness of household RO membrane filters meets the standards after winding the RO membrane, it is necessary to specially design a device that can quickly detect the air tightness of household RO membrane filters to prevent leakage and ensure product quality. Utility Model Content

[0003] The utility model aims to provide a RO membrane airtightness testing machine to detect the airtightness of household RO membrane filters to prevent leakage and ensure the technical requirements of product quality.

[0004] The technical solutions adopted to solve the above problems are:

[0005] A RO membrane airtightness testing machine comprises a household RO membrane filter sealing fixture, a position sensor, a vacuum pump, an air storage tank and a solenoid valve for controlling air extraction and air supply, an air pipe connecting the sealing fixture and the vacuum pump, and a negative pressure gauge connected in the air pipe.

[0006] The sealing fixture is provided with an air extraction hole in the middle and a countersunk hole at the upper end. The countersunk hole is plugged into and matched with the central tube of the household RO membrane filter, and is pressed and sealed by a sealing ring sleeved on the outer ring of the central tube. The position sensor is provided at the lower part of the sealing fixture. After the sensing probe passes through the through hole provided in the sealing fixture, it faces the installed household RO membrane filter, so that the controller can obtain the position signal of the installation completion.

[0007] The vacuum pump evacuates air from the household RO membrane filter to form a negative pressure environment, causing the negative pressure in the trachea to stabilize at a certain negative pressure value. The negative pressure gauge detects the air pressure value in the trachea at this time to determine whether the corresponding household RO membrane filter meets the sealing performance requirements.

[0008] Furthermore, the extracted gas is stored in the gas storage tank, and after the detection of the household RO membrane filter is completed, the gas is restored to the household RO membrane filter under the control of the solenoid valve.

[0009] Furthermore, a touch screen is provided on the workbench, and a qualified or unqualified signal is displayed according to the indication result of the negative pressure gauge, and transmitted to an OK or NG indicator light.

[0010] Furthermore, the workbench is provided with a plurality of sealing jigs according to the pore size of the central tube of the household PD membrane filter to be tested, and under the control of a plurality of solenoid valves, an air tightness test is performed on a plurality of household PD membrane filters to be tested.

[0011] The beneficial effects of the utility model are:

[0012] The RO membrane airtightness testing machine uses multiple sealing fixtures and cooperates with multiple solenoid valves to implement asynchronous and independently implementable testing processes on multiple household RO membrane filters to be tested. It uses gas storage tanks to store gas to quickly restore the internal air pressure of the household RO membrane filters and air pipes to be tested, thereby improving testing efficiency, fully ensuring product quality, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 1 is a side plan view of the PD membrane airtightness testing machine of Example 1;

[0014] Figure 2 4 is a front view of the PD membrane airtightness testing machine of the embodiment;

[0015] Figure 3 A partial cross-sectional view of the sealing fixture described in the embodiment;

[0016] Figure 4 Figure 3 A partial enlarged view of the middle A;

[0017] Among them, 1-household RO membrane filter, 2-sealing fixture, 3-workbench, 4-solenoid valve, 5-gas storage tank, 6-vacuum pump, 7-emergency stop switch, 8-start-stop switch, 9-control console, 10-touch screen, 11-negative pressure gauge, 12-OK indicator light, 13-NG indicator light, 14-center tube, 15-RO membrane material, 16-tape, 17-through hole, 18-position sensor, 19-exhaust hole, 20-countersunk hole, 21-sealing ring. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model will be described clearly and completely in the following in conjunction with the accompanying drawings in the form of embodiments.

[0019] See also Figures 1 to 4 The present embodiment provides a RO membrane airtightness testing machine, comprising a household RO membrane filter 1 sealing fixture 2, a position sensor 18, a vacuum pump 6, an air storage tank 5 and a solenoid valve 4 for controlling air extraction and air supply, and an air pipe connecting the sealing fixture 2 and the vacuum pump 6 and a negative pressure gauge 11 connected to the air pipe.

[0020] See also Figure 3 and Figure 4 The sealing fixture 2 is provided with an air extraction hole 19 in the middle and a countersunk hole 20 at the upper end. The countersunk hole 20 is plugged into and matched with the central tube 14 of the household RO membrane filter 1, and is pressed and sealed by a sealing ring 21 sleeved on the outer ring of the central tube 14. The position sensor 18 is provided at the lower part of the sealing fixture 2. After its sensing probe passes through the through hole 17 provided in the sealing fixture 2, it faces the installed household RO membrane filter 1, so that the controller can obtain the position signal of the installation completion.

[0021] See also Figure 1 The vacuum pump 6 evacuates air from the household PD membrane filter 1 to form a negative pressure environment, so that the negative pressure in the trachea is stabilized at a certain negative pressure value. The negative pressure value is framed into a qualified range according to the negative pressure value of a qualified product. When the household PD membrane filter 1 to be tested is evacuated and the negative pressure value falls within the qualified range, the household PD membrane filter 1 to be tested is judged to be a qualified product, otherwise it is an unqualified product.

[0022] See also Figure 2 In order to improve the detection efficiency, the extracted gas is stored in the gas storage tank 5, and after the detection of the household RO membrane filter 1 is completed, the solenoid valve 4 controls the recovery of the gas to the household RO membrane filter 1.

[0023] See also Figure 1 In order to highlight the clearness of the test results, a touch screen 10 is provided on the workbench 3, and a qualified or unqualified signal is displayed according to the indication result of the negative pressure meter 11, and transmitted to the OK or NG indicator light 13.

[0024] See also Figure 2 The workbench 3 is provided with three sealing fixtures 2 according to the pore size of the central tube 14 of the household PD membrane filter 1 to be tested, and under the control of three independent solenoid valves 4, the three household PD membrane filters 1 to be tested are distributedly tested for air tightness, and the distributed control implements the air tightness test, which improves the efficiency of the air tightness test.

[0025] The above describes in detail the implementation modes of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes. Various changes, modifications, substitutions and variations can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A RO membrane airtightness testing machine, comprising a household RO membrane filter (1) sealing fixture (2), a position sensor (18), a vacuum pump (6), a gas storage tank (5), and a solenoid valve (4) for controlling air extraction and air supply, and an air pipe connecting the sealing fixture (2) and the vacuum pump (6), and a negative pressure gauge (11) connected to the air pipe, characterized in that: The sealing jig (2) is provided with an air extraction hole (19) in the middle and a countersunk hole (20) at the upper end. The countersunk hole (20) is plugged into and matched with the central tube (14) of the household PD membrane filter (1), and is pressed and sealed by a sealing ring (21) sleeved on the outer ring of the central tube (14). The position sensor (18) is provided at the lower part of the sealing jig (2). After the sensing probe thereof passes through the through hole (17) provided in the sealing jig (2), it faces the installed household PD membrane filter (1), so that the controller can obtain a position signal indicating that the installation is completed. The vacuum pump (6) evacuates air from the household RO membrane filter (1) to form a negative pressure environment, so that the negative pressure in the trachea is stabilized at a certain negative pressure value. The negative pressure gauge (11) detects the air pressure value in the trachea at this time to determine whether the household RO membrane filter (1) being tested meets the sealing performance requirements.

2. The PD membrane airtightness testing machine according to claim 1, characterized in that: The gas storage tank (5) stores the extracted gas, and after the detection of the household RO membrane filter (1) is completed, the gas is restored to the household RO membrane filter (1) under the control of the electromagnetic valve (4).

3. The PD membrane airtightness testing machine according to claim 1, characterized in that: The workbench (3) is provided with a touch screen (10), which displays a qualified or unqualified signal according to the indication result of the negative pressure gauge (11), and transmits it to an OK or NG indicator light (13).

4. The PD membrane airtightness testing machine according to claim 1, characterized in that: The workbench (3) is provided with a plurality of sealing jigs (2) according to the pore sizes of the central tubes (14) of the household PD membrane filters (1) to be tested, and air tightness tests are performed on the plurality of household PD membrane filters (1) to be tested under the control of a plurality of solenoid valves (4).

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