CN211626836U - Automatic air tightness detection device of roll type membrane element - Google Patents
Automatic air tightness detection device of roll type membrane element Download PDFInfo
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- CN211626836U CN211626836U CN201922493060.2U CN201922493060U CN211626836U CN 211626836 U CN211626836 U CN 211626836U CN 201922493060 U CN201922493060 U CN 201922493060U CN 211626836 U CN211626836 U CN 211626836U
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Abstract
The utility model discloses an automatic air tightness detection device of a roll type membrane element, which comprises a frame, a membrane element positioning mechanism, a high-pressure detection mechanism and a sorting mechanism; the membrane element positioning mechanism is arranged on the top side of the rack and comprises a cylindrical membrane shell and plugging pieces arranged at two ends of the membrane shell, the high-pressure detection mechanism comprises a high-pressure air pipe, an air pressure regulating valve, a control valve and a pressure sensor, the air pressure regulating valve, the control valve and the pressure sensor are arranged on the high-pressure air pipe, and the first end of the high-pressure air pipe is communicated with the membrane shell after being inserted into the plugging pieces; the sorting mechanism comprises a sorting box, a sorting plate and a power unit for pushing the sorting plate to move, and the sorting box is arranged under the membrane element positioning mechanism. According to the automatic air tightness detection device for the roll type membrane element, the detection efficiency is improved by setting double-station detection; the manual working strength is reduced, whether the air tightness of the detected membrane element is qualified or not is judged without depending on operators, and the error rate of qualified judgment of products caused by operator operation errors is avoided.
Description
Technical Field
The utility model belongs to the technical field of the film element production, specifically speaking relates to an automatic air tightness detection device of formula of book film element.
Background
The currently widely adopted industry of reverse osmosis membranes and nanofiltration membranes is a negative pressure difference detection method for detecting the air tightness of membrane elements, which specifically comprises the following steps: fully wetting the membrane element; one end of a central pipe of the membrane element is sealed by a plug, and the other end of the central pipe of the membrane element is connected with a water circulation type vacuum pump and a vacuum pressure gauge, so that no leakage is ensured; starting a vacuum pump, stopping vacuumizing and maintaining pressure for 1min when the reading of a vacuum pressure gauge is-20 KPa, recording the reading change of the pressure gauge during vacuumizing, and repeatedly testing for 3 times; if the vacuum degree reduction rate is more than 20KPa/min, the detected membrane element has leakage, and the air tightness is unqualified, otherwise, the air tightness is qualified. The negative pressure detection method in the prior art is adopted to have the condition of inaccurate detection, because when the element is pumped to negative pressure, the membrane pages are influenced by atmospheric pressure and are pressed tightly, so that if a small glue line tunnel exists or the glue is not dry, whether the element is qualified or not can not be judged by detecting the air tightness of the element; the detection method can not detect the fatal quality defect that the central tube of the membrane element has no water collecting hole; on the other hand, the detection method has the advantages of low automation degree, high labor cost, more complicated operation steps and difficulty in improving the detection efficiency.
In view of the above, it is desirable to provide an automatic tightness detection device for a roll-type membrane element, so as to provide a detection device for a roll-type membrane element with high automation degree, so as to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: provides an automatic air tightness detection device of a roll type membrane element,
in order to realize the purpose, the utility model discloses the technical scheme who takes does:
an automatic air tightness detection device of a roll type membrane element comprises a frame, a membrane element positioning mechanism, a high-pressure detection mechanism and a sorting mechanism; the membrane element positioning mechanism is arranged on the top side of the rack and comprises a cylindrical membrane shell and plugging pieces arranged at two ends of the membrane shell, the high-pressure detection mechanism comprises a high-pressure air pipe, an air pressure regulating valve, a control valve and a pressure sensor, the air pressure regulating valve, the control valve and the pressure sensor are arranged on the high-pressure air pipe, and the first end of the high-pressure air pipe is communicated with the membrane shell after being inserted into the plugging pieces; the sorting mechanism comprises a sorting box, a sorting plate and a power unit for pushing the sorting plate to move, and the sorting box is arranged under the membrane element positioning mechanism.
Preferably, the sorting box is internally divided into a qualified product collecting box and a defective product collecting box.
Preferably, the membrane element positioning device further comprises an air cylinder or an oil cylinder, and the air cylinder or the oil cylinder presses the blocking piece to the end part of the membrane shell.
Preferably, the membrane element positioning mechanism further comprises a feed sensor for detecting and sensing a membrane element placed in the membrane housing.
Preferably, the frame is provided with one station or two adjacent parallel stations, and each station is provided with the film element positioning device.
Preferably, the sorting mechanism comprises two sorting plates and two power units which are arranged between the membrane element positioning mechanism and the sorting box.
Preferably, the two sorting plates are obliquely arranged above the qualified product collecting box and the defective product collecting box respectively, and the power unit is an air rod or an oil cylinder and drives the bottoms of the sorting plates to extend downwards to the opening of the qualified product collecting box or the defective product collecting box.
Preferably, the film element sorting device further comprises a control system, wherein the control system receives signals of the incoming material sensor and sends instructions to the film element positioning mechanism and the high-pressure detection mechanism and the sorting mechanism.
Preferably, the film detection device further comprises a touch screen for setting data such as detection air pressure values and detection time and recording the detection number and the measured value of each film element.
The technical scheme of the utility model the beneficial technological effect who gains is:
according to the automatic air tightness detection device for the roll type membrane element, the double-station detection is arranged, so that the detection speed and efficiency are improved; the automatic control is realized by adopting the control system, the automatic unloading and the automatic qualified sorting can be realized, the manual work intensity is reduced, whether the air tightness of the detected membrane element is qualified or not is judged without depending on operators, and the product qualification judgment error rate caused by the operator misoperation is reduced; the touch screen is set to record detection data, the detection data of the touch screen can be manually inquired to verify the detection result of the current day, and the recorded data can be uploaded to a computer through a USB flash disk, so that the recording of the detection result of the element is realized.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
FIG. 1 is a schematic exterior view of an automated gas tightness detection apparatus for a roll-type membrane element according to an embodiment;
FIG. 2 is another schematic diagram of an embodiment of an automated air tightness detection apparatus;
FIG. 3 is a schematic perspective view of a membrane element positioning mechanism and a sorting mechanism in another embodiment;
FIG. 4 is a schematic structural diagram of a high voltage detection mechanism in another embodiment;
FIG. 5 is a schematic view of an initial state of the sorting mechanism in one embodiment;
FIG. 6 is a schematic view showing the operation of the sorting mechanism in one embodiment (the dotted line shows the movement path of the sorting plate);
FIG. 7 is a second schematic diagram of the operation of the sorting mechanism in one embodiment (the dashed lines indicate the movement path of the sorting plate);
FIG. 8 is a schematic view of the connection between the discharge cylinder and the membrane housing in another embodiment;
reference numerals:
1-frame 2-membrane element positioning mechanism 3-membrane shell
4-plug 5-unloading cylinder 6-jacking cylinder
7-detection port 8-air pressure regulating valve 9-control valve
10-pressure sensor 11-high-pressure air pipe 12-sorting box
13-first sorting board 14-second sorting board 15-center tube
16-incoming material sensor 17-first station 18-second station
19-fixed rod 20-first cylinder 21-second cylinder
22-qualified product collection box 23-defective product collection box 24-touch screen
25-digital display pressure gauge 26-power switch 27-operation button
28-stop button.
Detailed Description
The present invention will be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Example 1
Referring to fig. 1, fig. 2 and fig. 8, the automatic air tightness detecting device for a roll-type membrane element in the present embodiment includes a frame, a membrane element positioning mechanism, a high pressure detecting mechanism and a sorting mechanism; the membrane element positioning mechanism is arranged on the top side of the rack and comprises a cylindrical membrane shell and plugging pieces arranged at two ends of the membrane shell, the high-pressure detection mechanism comprises a high-pressure air pipe, an air pressure regulating valve, a control valve and a pressure sensor, the air pressure regulating valve is arranged on the high-pressure air pipe and used for controlling the ventilation volume of high-pressure air filled into the high-pressure air pipe, the control valve is used for controlling the on-off of the high-pressure air for detection, the pressure sensor is used for detecting the air pressure in the membrane element, and the first end of the high-pressure air pipe is communicated with a central pipe of; the plug that can adopt materials such as rubber material or high-strength plastics or wood to prepare is as the shutoff piece, and one of them plug is solid construction and its end and the inner diameter phase-match of film element center tube tip, can insert the end of the plug to center tube tip like this with its shutoff, another plug inside be connected with high-pressurepipe be provided with high-pressurepipe complex clearing hole to place in the film element center tube behind the high-pressurepipe inserts the plug. The sorting mechanism comprises a sorting box, a sorting plate and a power unit for pushing the sorting plate to move, the sorting box is arranged under the membrane element positioning mechanism, and the inside of the sorting box is divided into a qualified product collecting box and a defective product collecting box. According to the device, a membrane element to be detected is placed in a membrane shell, then two ends of the membrane shell are plugged by adopting the plugging piece, wherein the high-pressure air pipe is connected with the plugging piece at one end, and then the membrane shell is filled with high-pressure air for detecting the air tightness of the membrane element; after the film elements fall into the upper surface of the sorting plate after the completion of the detection, the power unit is an air rod or an oil cylinder, the power unit of the sorting mechanism is started to push the sorting plate to move to the opening of the qualified product collecting box or the defective product collecting box, the film elements qualified in air tightness detection are led into the qualified product collecting box, and the film elements unqualified in air tightness detection are led into the defective product collecting box. The device has reasonable structure, simple and convenient operation and higher automation degree, and can improve the efficiency of the air tightness detection process of the membrane element.
On the basis of the embodiment, in another improved embodiment, two adjacent and parallel stations, namely a first station and a second station, are arranged on the machine frame, and each station is provided with a film element positioning device. The sorting mechanism comprises two sorting plates and two power units which are arranged between the membrane element positioning mechanism and the sorting box. Referring to fig. 3 and 5 to 7, the first sorting plate and the second sorting plate are respectively disposed above the defective product collecting box and the defective product collecting box through fixing rods, and both ends of the fixing rods are fixed on the rack, so that the first sorting plate and the second sorting plate can respectively rotate around the fixing rods. The first cylinder and the second cylinder are respectively arranged on the back surfaces of the first sorting plate and the second sorting plate, and the tail ends of the piston rods of the first cylinder and the second cylinder respectively push the first sorting plate and the second sorting plate to move along the direction of the piston rods. When the first cylinder or the second cylinder pushes the first sorting plate or the second sorting plate to move downwards, the bottom end face of the first sorting plate or the second sorting plate moves to the opening of the defective product collecting box or the qualified product collecting box respectively, and film elements falling on the sorting plate are guided into the defective product collecting box or the qualified product collecting box respectively. Through setting up two power pack and two letter sorting boards, can its motion of independent control, automatic film element distribution after will detecting has improved letter sorting efficiency to the letter sorting incasement that corresponds. Of course, in fig. 5 to 7, the positions of the defective product collecting box and the defective product collecting box can be reversed without affecting the sorting result. In other embodiments, only one station may be provided, or the sorting mechanism only employs one power unit and one sorting plate, the bottom end surface of the sorting plate corresponds to the boundary line between the defective product collecting box and the qualified product collecting box, the power unit pushes the sorting plate to swing back and forth, that is, according to whether the detected film element is qualified or not, the power unit pushes the bottom end surface of the sorting plate to swing to the opening of the defective product collecting box or the qualified product collecting box, so as to sort the film element.
On the basis of the above embodiment, in another improved embodiment, the membrane element positioning device further comprises an air cylinder or an oil cylinder, and the air cylinder or the oil cylinder presses the blocking piece to the end part of the membrane shell. The plugging piece can be tightly pressed at the end part of the membrane shell through the air cylinder or the oil cylinder, and the sealing performance of the membrane shell in the test process is guaranteed.
On the basis of the above embodiment, in another improved embodiment, the high pressure detection device further comprises a high pressure air compressor communicated with the second end of the high pressure air pipe.
The working steps and the basic principle of the automatic air tightness detection device of the roll-type membrane element for the air tightness test of the membrane element are described with the accompanying drawings 2 and 4:
s1, placing a membrane element to be tested into a membrane shell, plugging a second end of the membrane shell by using a plugging piece, ensuring that the tail end of the plugging piece plugs the end part of a central tube of the membrane element, then inserting a first end of a high-pressure air pipe into the plugging piece, placing the tail end into the other end of the central tube of the membrane element to be tested, and sealing the end part of the membrane shell by using the plugging piece;
s2, inflating the interior of the membrane element through a high-pressure air pipe, closing the control valve and keeping the pressure for 1min when the set maximum inflation pressure value is reached, and detecting and recording the pressure drop value at the end of 1min by the pressure sensor;
s3, calculating a pressure drop rate according to the pressure drop value recorded in the step S2, wherein the pressure drop rate is equal to 100% of the pressure drop value/the maximum inflation pressure value; and if the pressure drop rate is within the set pressure drop rate standard value range, judging that the air tightness of the membrane element to be tested is qualified, otherwise, judging that the air tightness is unqualified.
And S4, when the film elements are detected, starting a sorting mechanism to sort the film elements into corresponding sorting boxes according to whether the detection result is a qualified product or a defective product.
The range of the maximum inflation pressure value in the step S2 is 50-80KPa, and the specific numerical value of the maximum inflation pressure value is determined according to the type characteristics of different membrane elements to be detected; the standard value range of the pressure drop rate in the step S3 is: the maximum pressure drop rate is 10% -20%, the specific numerical value of the maximum pressure drop rate is determined according to the type characteristics of different membrane elements to be detected, the minimum pressure drop rate is 1%, and when the pressure drop rate is between the numerical values of the maximum pressure drop rate and the minimum pressure drop rate, the air tightness of the membrane elements to be detected is judged to be qualified.
In another embodiment, the reverse osmosis membrane element of eight inches in standard industry is subjected to gas detection, and the maximum inflation pressure value is determined to be 50KPa, the maximum pressure drop rate is determined to be 18 percent, and the minimum pressure drop rate is determined to be 1 percent by combining membrane characteristics and an actual detection method. Namely, the pressure drop value is within the range of 0.1-9.0KPa/min (namely the pressure drop rate is between 18% -1%), which indicates that the air tightness of the membrane element is qualified, otherwise, the membrane element is not qualified. By adopting the positive pressure type membrane element air tightness testing method, the air tightness can be detected under the condition that a very small glue line tunnel exists in the membrane element or glue is not dry; the quality defect that the central pipe of the membrane element has no water collecting hole can be detected; the quality abnormal condition that the air tightness of the membrane element is unqualified due to the abnormal edge glue can be accurately judged, and the abnormal position can be accurately found out; one membrane element can be detected at one time, the operation is simple and convenient, and the result is reliable.
Example 2
Referring to fig. 2, the automated air tightness detecting apparatus of the roll type membrane element of the present embodiment is different from the structure of embodiment 1 in that: the membrane element positioning mechanism also comprises a feed sensor which is used for detecting and sensing the membrane element arranged in the membrane shell; the film element sorting machine further comprises a PLC control system, wherein the control system receives signals of the incoming material sensor and sends instructions to the film element positioning mechanism and the high-voltage detection mechanism sorting mechanism. The rack is also provided with a touch screen, a power switch, an operation button and a stop button, wherein the touch screen is used for setting data such as a detection air pressure value and detection time, and recording the detection quantity and the measurement value of each membrane element; the power switch knob turns on or off the equipment; the running button is pressed in a stop state, and the equipment enters a running state; the stop button is pressed in the running state to exit the running state and enter the stopping state.
The working principle of the automatic tightness detection device for a roll-type membrane element in the present embodiment is briefly described as follows:
1. when the incoming material detection sensor detects that a film element exists in a station, the film element is pushed into the cylinder of the air cylinder for delay of 0.1s to push the film element into a detection port;
2. then delaying for 0.2s to open the control valve to charge air into the central tube of the membrane element, closing the control valve when the pressure detector detects that the current pressure is greater than or equal to the set pressure value, and recording the pressure value P1 at the moment;
3. timing is started after the control valve is closed, the timing time reaches a set value, a pressure value P2 at the moment is recorded, and meanwhile, the membrane element is closed to jack into the air cylinder;
4. and (3) calculating the pressure drop P3 which is P1-P2, judging that the products with the pressure drop value P3 which is P4 (pressure drop set value) are qualified products, judging that the other products are unqualified products, delaying for 0.1s to start the discharging cylinder, starting the qualified sorting cylinder or the unqualified sorting cylinder according to the judgment result, and sorting the components to a qualified collection box or an unqualified collection box through a qualified sorting plate or an unqualified sorting plate.
5. Recording the detection data; the unloading cylinder and the sorting cylinder return to the original positions.
Description of counting procedure: in the running state, the qualified sorting cylinder counts the qualified number once every time the qualified sorting cylinder moves; counting the unqualified number once when the unqualified sorting cylinder moves once; this equipment adopts PLC control system to be equipped with the touch-sensitive screen, this system program can record the pressure value that finishes that detects when detecting pressurize initial pressure value and check time arrive at every turn, and calculate the pressure drop value initial pressure-pressure that finishes, detects at every turn and all can teach above-mentioned three data record and can turn over on the touch-sensitive screen and read, can also export data from the system through the USB flash disk.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. An automatic air tightness detection device of a roll type membrane element is characterized by comprising a rack, a membrane element positioning mechanism, a high-pressure detection mechanism and a sorting mechanism; the membrane element positioning mechanism is arranged on the top side of the rack and comprises a cylindrical membrane shell and plugging pieces arranged at two ends of the membrane shell, the high-pressure detection mechanism comprises a high-pressure air pipe, an air pressure regulating valve, a control valve and a pressure sensor, the air pressure regulating valve, the control valve and the pressure sensor are arranged on the high-pressure air pipe, and the first end of the high-pressure air pipe is communicated with the membrane shell after being inserted into the plugging pieces; the sorting mechanism comprises a sorting box, a sorting plate and a power unit for pushing the sorting plate to move, and the sorting box is arranged under the membrane element positioning mechanism.
2. The automated airtightness detection apparatus for roll type membrane element according to claim 1, wherein the sorting tank is internally partitioned into a certified product collection tank and a defective product collection tank.
3. The automated tightness detection device of roll type membrane element according to claim 2, wherein the membrane element positioning device further comprises an air cylinder or an oil cylinder, the air cylinder or the oil cylinder presses the blocking piece to the end of the membrane housing.
4. The automated air tightness detection device of a spiral wound membrane element of claim 2, wherein the membrane element positioning mechanism further comprises a feed sensor for detecting and sensing a membrane element placed in the membrane housing.
5. The automated air tightness detection device of roll type membrane element according to claim 2, wherein the frame is provided with one station or two adjacent and parallel stations, each station is provided with the membrane element positioning device.
6. The automated air tightness detection device of roll type membrane element according to claim 5, wherein the sorting mechanism comprises two sorting plates and two power units disposed between the membrane element positioning mechanism and the sorting box.
7. The automated air tightness detecting device of roll type membrane element according to claim 6, wherein two sorting plates are obliquely disposed above the qualified product collecting box and the defective product collecting box, respectively, and the power unit is an air rod or an oil cylinder driving the bottom of the sorting plate to extend downward to the opening of the qualified product collecting box or the defective product collecting box.
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| CN201922493060.2U CN211626836U (en) | 2019-12-31 | 2019-12-31 | Automatic air tightness detection device of roll type membrane element |
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| CN201922493060.2U CN211626836U (en) | 2019-12-31 | 2019-12-31 | Automatic air tightness detection device of roll type membrane element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536244A (en) * | 2020-11-24 | 2021-03-23 | 德清天盛轻工工艺制品有限公司 | Water injection base sealing performance detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536244A (en) * | 2020-11-24 | 2021-03-23 | 德清天盛轻工工艺制品有限公司 | Water injection base sealing performance detection method |
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