Vacuum filtration device for water quality detection

Abstract

The invention relates to the technical field of water quality detection, and discloses a vacuum filtration device for water quality detection, which comprises a main case, a filter membrane translation mechanism, a feeding mechanism, a first bracket, a second bracket, a bracket driver and a filter membrane collection structure, the filter membrane translation mechanism comprises a membrane carrying structure and a horizontal driver which are in transmission connection, the membrane carrying structure is provided with a membrane receiving position, a suction filtration position and a membrane unloading position, and the membrane receiving position is opposite to the feeding mechanism and used for receiving a filter membrane from the feeding mechanism; the suction filtration position is located between the first support and the second support, and the support driver is in transmission connection with the first support and the second support so as to drive the two supports to be close to or away from the suction filtration position; the first support is provided with a first container, the second support is provided with a second container, the first container is connected with a water injection pump, and the second container is connected with a pressure pump and a drainage pump; the filter membrane collecting structure comprises a collecting vessel groove, an opening and closing mechanism and a membrane unloading structure, the collecting vessel groove is located at a membrane unloading position, and the membrane unloading structure is used for being matched with a filter membrane at the membrane unloading position in a jacking manner.

Description

Technical Field

[0001] The invention relates to the technical field of water quality detection, in particular to a vacuum filtration device for water quality detection. Background Art

[0002] In water quality testing, vacuum filtration is a common operation step. Its principle is to use vacuum to form negative pressure to accelerate the filtration of water samples. The membrane filter method is usually used for the identification and detection of bacterial flora in water samples. The water sample is passed through a filter membrane with a specific pore size to capture microorganisms.

[0003] At present, the steps for obtaining a filter membrane that enriches microorganisms by vacuum filtration are as follows: first install the sand core filter on the standard plug triangle bottle, use tweezers to remove the filter membrane from the filter membrane box, move it to the filter cup interface of the sand core filter, cover the filter cup on the sand core filter, and fix it with a strong clamp; then, connect the filter to the vacuum pump, add the water sample to be filtered into the filter cup, and when the standard plug triangle bottle is full of water, manually remove the standard plug triangle bottle to empty the water sample, and finally reassemble the device and repeat the above steps. During the entire test process, it is necessary to continuously observe whether the triangle bottle is full of water, manually drain the water in time, and manually replace the filter membrane after the filtration is completed.

[0004] However, when obtaining the filter membrane by vacuum filtration, the test personnel need to repeatedly perform steps such as installing the membrane, injecting water, pumping pressure, draining water, replacing the membrane and loading the dish. The manual operation is complicated, the test efficiency is low, and it is difficult to ensure the accuracy of the water quality test results. Summary of the invention

[0005] The technical problem to be solved by the present invention is that when obtaining the filter membrane by vacuum filtration, the test personnel need to repeatedly perform the steps of installing the membrane, injecting water, pumping pressure, draining water, changing the membrane and loading the dish. The manual operation is complicated, the test efficiency is low, and it is difficult to ensure the accuracy of the water quality test results.

[0006] In order to solve the above technical problems, the present invention provides a technical solution of a vacuum filtration device for water quality detection:

[0007] The vacuum filtration device for water quality detection comprises a main housing, and a filter membrane translation mechanism, a feeding mechanism, a first bracket, a second bracket, a bracket driver and a filter membrane collection structure arranged in the main housing, wherein the movement path of the filter membrane translation mechanism extends in the horizontal direction;

[0008] The membrane translation mechanism includes a membrane carrying structure and a horizontal driver, the horizontal driver is in driving connection with the membrane carrying structure, the membrane carrying structure is provided with a membrane accommodating groove, the membrane carrying structure has a membrane receiving position, a filtration position and a membrane unloading position, the membrane receiving position is opposite to the feeding mechanism, and is used to receive the membrane from the feeding mechanism;

[0009] The first bracket and the second bracket are arranged at intervals in the upper and lower parts, the extraction position is between the first bracket and the second bracket, and the bracket driver is respectively connected to the first bracket and the second bracket in a transmission manner to drive the first bracket and the second bracket to move closer to or away from the extraction position;

[0010] A first container is mounted on the first bracket, a second container is mounted on the second bracket, both the first container and the second container are provided with openings facing the filtration position, the first container is connected to a water injection pump, and the second container is connected to a suction pump and a drainage pump;

[0011] The filter membrane collection structure includes a collection dish trough, an opening and closing mechanism and a membrane unloading structure. The collection dish trough is in the membrane unloading position, the opening and closing mechanism is arranged on the upper side of the collection dish trough, the membrane unloading structure is arranged on the outer side of the collection dish trough, and the membrane unloading structure is used to cooperate with the filter membrane on the membrane unloading position.

[0012] Furthermore, it also includes a main control board, which is electrically connected to the filter membrane translation mechanism, the feeding mechanism, the bracket driver, the filter membrane collection structure, the water injection pump, the suction pump and the drainage pump; the driving direction of the bracket driver is arranged to extend vertically, and the opening of the first container and the opening of the second container are respectively arranged vertically opposite to the filter membrane accommodating groove.

[0013] Furthermore, the membrane carrier structure includes two spaced-apart support plates, the inner sides of the two support plates are respectively provided with grooves, and the two grooves and the gap in the middle constitute a filter membrane accommodating groove; when in the filtration position, the first container or the second container is staggered with the projection contour of the two support plates in the horizontal plane.

[0014] Furthermore, the horizontal drive is two screw motors, the two screw motors are arranged in parallel and spaced apart, the two screw motors are respectively arranged on the outside of the first container or the second container, and the two support plates are respectively fixedly connected to the driving ends of the corresponding screw motors.

[0015] Furthermore, the main housing is provided with a feed port, and the feeding mechanism includes a paper pickup wheel and a pager, both of which are installed at the feed port, and the paper pickup wheel and the pager are respectively used for friction cooperation with the filter membrane, and the feed port is equipped with a feeding chute, and the feeding chute is opposite to the film connecting position.

[0016] Furthermore, a first interface is opened at the upper part of the first container, and an injection pipe is connected between the first interface and the injection pump; a second interface is opened at the upper part of the second container, and a suction and pressure pipe is connected between the second interface and the suction and pressure pump; a third interface is opened at the lower part of the second container, and a drainage pipe is connected between the third interface and the drainage pump.

[0017] Furthermore, two first liquid level sensors are arranged inside the first container, and the two first liquid level sensors are arranged at intervals in the upper and lower parts of the first container; two second liquid level sensors are arranged inside the second container, and the two second liquid level sensors are arranged at intervals in the upper and lower parts of the second container.

[0018] Furthermore, the film unloading structure is a film unloading push rod, the end of which protrudes from the upper part of the filter membrane accommodating groove, and the end of the film unloading push rod is also provided with a guide surface, which extends obliquely upward from the filtration position to the film unloading position.

[0019] Furthermore, the opening and closing mechanism is a telescopic pneumatic suction cup, the telescopic direction of the telescopic pneumatic suction cup is arranged along the vertical extension, and the telescopic pneumatic suction cup is used for adsorption and cooperation with the dish cover.

[0020] Furthermore, a dish bin is installed outside the main housing, the dish bin is communicated with the collecting dish tank, and a bin position sensor is also arranged at the bottom of the dish bin.

[0021] Compared with the prior art, the vacuum filtration device for water quality detection of the present invention has the following beneficial effects: the vacuum filtration device for water quality detection adopts the design form of a main housing, a filter membrane translation mechanism, a feeding mechanism, a first bracket, a second bracket, a bracket driver and a filter membrane collection structure. The filter membrane translation mechanism, the feeding mechanism, the first bracket, the second bracket, the bracket driver and the filter membrane collection structure are all arranged in the main housing, and the moving path of the filter membrane translation mechanism extends along the horizontal direction. The filter membrane translation mechanism includes a membrane carrier structure and a horizontal driver. The horizontal driver can drive the membrane carrier structure to move horizontally, so that the membrane carrier structure switches between a membrane connection position, a filtration position and a membrane unloading position. When in the membrane connection position, the feeding mechanism sends the filter membrane toward the membrane carrier structure, and the membrane carrier structure receives the filter membrane from the feeding mechanism, and then the filter membrane is transferred to the filtration position to complete the vacuum filtration test.

[0022] Among them, the first bracket and the second bracket are arranged at intervals up and down, the bracket driver is respectively connected to the first bracket and the second bracket, and the filtration position is between the first bracket and the second bracket; when the membrane-carrying structure moves to the filtration position, the bracket driver can drive the first bracket and the second bracket to approach each other, at this time, the first container on the first bracket and the second container on the second bracket are open and closed, and the filter membrane is sealed and clamped between the opening of the first container and the opening of the second container. In addition, the first container is connected to a water injection pump, and the second container is connected to a suction pump and a drainage pump. The water injection pump is started to inject the test water sample into the first container, and then the suction pump is started to form a pressure difference between the second container and the first container. The water sample flows into the second container after being filtered by the filter membrane. After the test water sample is filtered, the filtered water is discharged through the drainage pump.

[0023] After multiple water injections, pressure extractions and drainages, a filter membrane for enriching and obtaining water sample microorganisms is obtained. In addition, the filter membrane collection structure includes a collection dish slot, an opening and closing mechanism and a membrane unloading structure. The collection dish slot is in a membrane unloading position, the opening and closing mechanism is arranged on the upper side of the collection dish slot, and the membrane unloading structure is arranged on the outer side of the collection dish slot. After the filter membrane is filtered through the water sample, the filter membrane is moved to the membrane unloading position through the membrane carrying structure, and the membrane unloading structure cooperates with the filter membrane on the membrane unloading position to separate the filter membrane from the filter membrane accommodating slot and enter the culture dish of the collection dish slot. The opening and closing mechanism drives the dish cover to be pressed into place, and the culture dish equipped with the filter membrane for batch enrichment of water sample microorganisms can be taken out from the dish outlet.

[0024] It should be noted that the device also includes a main control board, which is electrically connected to the filter membrane translation mechanism, the feeding mechanism, the bracket driver, the filter membrane collection structure, the water injection pump, the suction and pressure pump, and the drainage pump, and can automatically complete the steps of membrane installation, water injection, pressure extraction, drainage, membrane replacement, and dish loading. The entire test process only needs to be manually started, and the steps of membrane installation, water injection, pressure extraction, drainage, membrane replacement, and dish loading can be automatically completed, avoiding the complex problems of manual operation, with high test efficiency, and can effectively ensure the accuracy of water quality test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the state of the vacuum filtration device for water quality detection in the embodiment of the present invention between the membrane connection position and the filtration position;

[0026] Figure 2 Schematic diagram of the structure of the vacuum filtration device for water quality detection in the filtration position according to the embodiment of the present invention;

[0027] Figure 3 It is a schematic structural diagram of a vacuum filtration device for water quality detection in an embodiment of the present invention when the membrane is unloaded;

[0028] In the figure: 1-main housing, 10-feed port, 2-filter membrane translation mechanism, 20-film carrying structure, 200-support plate, 21-horizontal driver, 22-filter membrane, 3-feeding mechanism, 30-paper pickup wheel, 31-paging device, 32-feeding chute, 4-first bracket, 40-first container, 41-water injection pump, 42-first interface, 43-water injection pipe, 5-second bracket, 50-second container, 51-suction pump, 52-drainage pump, 53-third interface, 54-drainage pipe, 55-suction pipe, 6-bracket driver, 7-filter membrane collection structure, 70-collection dish tank, 71-opening and closing mechanism, 72-film unloading structure, 73-guide surface, 74-dish bin, 8-main control board. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figures 1 to 3As shown, a vacuum filtration device for water quality detection according to an embodiment of the present invention comprises a main housing 1, and a filter membrane translation mechanism 2, a feeding mechanism 3, a first bracket 4, a second bracket 5, a bracket driver 6 and a filter membrane collecting structure 7 arranged in the main housing 1, wherein the moving path of the filter membrane translation mechanism 2 extends along the horizontal direction; the filter membrane translation mechanism 2 comprises a membrane carrier structure 20 and a horizontal driver 21, the horizontal driver 21 is transmission-connected to the membrane carrier structure 20, the membrane carrier structure 20 is provided with a filter membrane accommodating groove, the membrane carrier structure 20 has a membrane connecting position, a filtration position and a membrane unloading position, the membrane connecting position is opposite to the feeding mechanism 3, and is used for receiving the filter membrane 22 from the feeding mechanism 3.

[0034] The first bracket 4 and the second bracket 5 are arranged with an interval up and down, and the filtration position is between the first bracket 4 and the second bracket 5. The bracket driver 6 is respectively connected to the first bracket 4 and the second bracket 5 to drive the first bracket 4 and the second bracket 5 to move closer to or away from the filtration position; a first container 40 is installed on the first bracket 4, and a second container 50 is installed on the second bracket 5. The first container 40 and the second container 50 are both provided with openings facing the filtration position. The first container 40 is connected to a water injection pump 41, and the second container 50 is connected to a suction pump 51 and a drainage pump 52.

[0035] The filter membrane collection structure 7 includes a collection dish slot 70, an opening and closing mechanism 71 and a membrane unloading structure 72. The collection dish slot 70 is in the membrane unloading position, the opening and closing mechanism 71 is arranged on the upper side of the collection dish slot 70, and the membrane unloading structure 72 is arranged on the outer side of the collection dish slot 70, and the membrane unloading structure 72 is used to cooperate with the filter membrane 22 on the membrane unloading position.

[0036] The vacuum filtration device for water quality detection adopts the design form of a main housing 1, a filter membrane translation mechanism 2, a feeding mechanism 3, a first bracket 4, a second bracket 5, a bracket driver 6 and a filter membrane collection structure 7. The filter membrane translation mechanism 2, the feeding mechanism 3, the first bracket 4, the second bracket 5, the bracket driver 6 and the filter membrane collection structure 7 are all arranged in the main housing 1, and the moving path of the filter membrane translation mechanism 2 extends along the horizontal direction. The filter membrane translation mechanism 2 includes a membrane carrier structure 20 and a horizontal driver 21. The horizontal driver 21 can drive the membrane carrier structure 20 to move horizontally, so that the membrane carrier structure 20 switches between the membrane connection position, the filtration position and the membrane unloading position. When in the membrane connection position, the feeding mechanism 3 sends the filter membrane toward the membrane carrier structure 20, and the membrane carrier structure 20 receives the filter membrane 22 from the feeding mechanism 3, and then the filter membrane is transferred to the filtration position to complete the vacuum filtration test.

[0037] Among them, the first bracket 4 and the second bracket 5 are arranged at intervals in the upper and lower parts, and the bracket driver 6 is respectively connected to the first bracket 4 and the second bracket 5 in transmission, and the filtration position is between the first bracket 4 and the second bracket 5; when the membrane-carrying structure 20 moves to the filtration position, the bracket driver 6 can drive the first bracket 4 and the second bracket 5 to approach each other, at this time, the first container 40 on the first bracket 4 and the second container 50 on the second bracket 5 are opened and closed, and the filter membrane 22 is sealed and clamped between the opening of the first container 40 and the opening of the second container 50. In addition, the first container 40 is connected to the water injection pump 41, and the second container 50 is connected to the suction pump 51 and the drainage pump 52. The water injection pump 41 is started to inject the test water sample into the first container 40, and then the suction pump 51 is started to form a pressure difference between the second container 50 and the first container 40. The water sample flows into the second container 50 after being filtered by the filter membrane 22. After the filtration of the test water sample is completed, the filtered water is discharged through the drainage pump 52.

[0038] After multiple water injection, pressure extraction and drainage, a filter membrane 22 for enriching and obtaining water sample microorganisms is obtained. In addition, the filter membrane collection structure 7 includes a collection dish slot 70, an opening and closing mechanism 71 and a membrane unloading structure 72. The collection dish slot 70 is in a membrane unloading position, the opening and closing mechanism 71 is arranged on the upper side of the collection dish slot 70, and the membrane unloading structure 72 is arranged on the outer side of the collection dish slot 70. After the filter membrane 22 is filtered by water sample, the filter membrane 22 is moved to the membrane unloading position by the membrane carrier structure 20, and the membrane unloading structure 72 cooperates with the filter membrane 22 on the membrane unloading position to separate the filter membrane 22 from the filter membrane accommodating slot and enter the culture dish of the collection dish slot 70. The opening and closing mechanism 71 drives the dish cover to press in place, and the culture dish equipped with the filter membrane for batch enrichment of water sample microorganisms can be taken out from the dish outlet.

[0039] It should be noted that the device also includes a main control board, which is electrically connected to the filter membrane translation mechanism 2, the feeding mechanism 3, the bracket driver 6, the filter membrane collection structure 7, the water injection pump 41, the suction and pressure pump 51 and the drainage pump 52, and can automatically complete the steps of membrane installation, water injection, suction and pressure, drainage, membrane replacement and dish loading. The entire test process only needs to be manually started, and the steps of membrane installation, water injection, suction and pressure, drainage, membrane replacement and dish loading can be automatically completed, avoiding the complex problems of manual operation, high test efficiency, and can effectively ensure the accuracy of water quality test results.

[0040] In this embodiment, the driving direction of the support driver 6 is arranged to extend vertically, and the opening of the first container 40 and the opening of the second container 50 are respectively arranged vertically opposite to the filter membrane accommodating groove. Specifically, the membrane-carrying structure 20 includes two spaced-apart supporting plates 200, and the inner sides of the two supporting plates 200 are respectively provided with grooves, and the two grooves and the interval in the middle constitute the filter membrane accommodating groove; in the filtration position, the projection contours of the first container 40 or the second container 50 and the two supporting plates 200 in the horizontal plane are staggered. The grooves of the two supporting plates 200 can be used to support and position the two sides of the filter membrane 22, and the membrane-carrying structure 20 can drive the filter membrane 22 to flexibly switch between the membrane connection position, the filtration position and the membrane unloading position, and in the filtration position, the first container 40 and the second container 50 will not interfere with the two supporting plates 200, ensuring that the filter membrane 22 can be effectively sealed and clamped by the two containers.

[0041] As a further preferred solution, the horizontal driver 21 is two screw motors, which are arranged in parallel and spaced apart. The two screw motors are respectively arranged on the outside of the first container 40 or the second container 50, and the two support plates 200 are respectively fixedly connected to the driving ends of the corresponding screw motors. In addition, the main housing 1 is provided with a feed port 10, and the feeding mechanism 3 includes a paper pickup wheel 30 and a pager 31, which are both installed at the feed port 10, and the paper pickup wheel 30 and the pager 31 are respectively used for frictional cooperation with the filter membrane 22, and the feed port 10 is provided with a feeding chute 32, and the feeding chute 32 is opposite to the film connection position. The filter membranes 22 can be fed into the feeding chute 32 one by one through the paper pickup wheel 30 and the pager 31, and the single filter membrane 22 enters the film carrier structure 20 through the feeding chute 32.

[0042] In this embodiment, a first interface 42 is provided at the top of the first container 40, and a water injection pipe 43 is connected between the first interface 42 and the water injection pump 41; a second interface is provided at the top of the second container 50, and a suction and pressure pipe 55 is connected between the second interface and the suction and pressure pump 51; a third interface 53 is provided at the bottom of the second container 50, and a drainage pipe 54 is connected between the third interface 53 and the drainage pump 52. In addition, two first liquid level sensors (not shown in the figure) are arranged inside the first container 40, and the two first liquid level sensors are arranged in the upper and lower parts of the first container 40; two second liquid level sensors are arranged inside the second container 50, and the two second liquid level sensors are arranged in the upper and lower parts of the second container 50.

[0043] Two first liquid level sensors are provided in the first container 40, which can detect the maximum water volume and the minimum water volume therein respectively. Correspondingly, two second liquid level sensors are provided in the second container 50, which can detect the maximum water volume and the minimum water volume therein respectively. When the injected water sample in the first container 40 reaches the maximum water volume, the injection pump 41 is controlled to be closed and the suction pump 51 is started for vacuum filtration; when the filtered water in the second container 50 reaches the maximum water volume, the suction pump 51 is controlled to be closed and the drainage pump 52 is started to drain water outward, and at the same time, the filtered water can be prevented from being sucked into the suction pump 51. At the same time, the main housing 1 is also provided with an interactive touch screen, which can flexibly set the volume of the injected test water sample.

[0044] In addition, the membrane unloading structure 72 is a membrane unloading push rod, the end of which protrudes from the upper part of the filter membrane accommodating groove, and the end of the membrane unloading push rod is also provided with a guide surface 73, which extends obliquely upward from the filtration position to the membrane unloading position. When the membrane carrying structure 20 translates from the filtration position to the membrane unloading position, the filter membrane 22 escapes through the guide surface 73 of the membrane unloading structure 71 and enters the culture dish in the collection dish groove 70, and the membrane unloading method is simple and reliable. As a further preferred embodiment, the opening and closing mechanism 71 is a telescopic pneumatic suction cup, the telescopic direction of the telescopic pneumatic suction cup is arranged along the vertical extension, and the telescopic pneumatic suction cup is used for adsorption and cooperation with the dish cover. A dish bin 74 is installed on the outside of the main housing 1, and the dish bin 74 is connected to the collection dish groove 70, and a bin position sensor is also provided at the bottom of the dish bin 74, which can detect the remaining culture dishes inside the dish bin 74 to prompt the number of culture dishes available in the device.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A vacuum filtration device for water quality testing, characterized in that: It comprises a main housing, and a filter membrane translation mechanism, a feeding mechanism, a first bracket, a second bracket, a bracket driver and a filter membrane collecting structure arranged in the main housing, wherein the moving path of the filter membrane translation mechanism extends in the horizontal direction; The membrane translation mechanism includes a membrane carrying structure and a horizontal driver, the horizontal driver is in driving connection with the membrane carrying structure, the membrane carrying structure is provided with a membrane accommodating groove, the membrane carrying structure has a membrane receiving position, a filtration position and a membrane unloading position, the membrane receiving position is opposite to the feeding mechanism, and is used to receive the membrane from the feeding mechanism; The first bracket and the second bracket are arranged at intervals in the upper and lower parts, the extraction position is between the first bracket and the second bracket, and the bracket driver is respectively connected to the first bracket and the second bracket in a transmission manner to drive the first bracket and the second bracket to move closer to or away from the extraction position; A first container is mounted on the first bracket, a second container is mounted on the second bracket, both the first container and the second container are provided with openings facing the filtration position, the first container is connected to a water injection pump, and the second container is connected to a suction pump and a drainage pump; The filter membrane collection structure includes a collection dish trough, an opening and closing mechanism and a membrane unloading structure. The collection dish trough is in the membrane unloading position, the opening and closing mechanism is arranged on the upper side of the collection dish trough, the membrane unloading structure is arranged on the outer side of the collection dish trough, and the membrane unloading structure is used to cooperate with the filter membrane on the membrane unloading position.

2. The vacuum filtration device for water quality testing according to claim 1, characterized in that: It also includes a main control board, which is electrically connected to the filter membrane translation mechanism, the feeding mechanism, the bracket driver, the filter membrane collection structure, the water injection pump, the suction pump and the drainage pump; the driving direction of the bracket driver is arranged to extend vertically, and the opening of the first container and the opening of the second container are respectively arranged vertically opposite to the filter membrane accommodating groove.

3. The vacuum filtration device for water quality testing according to claim 2, characterized in that: The membrane carrier structure includes two support plates arranged at intervals, and the inner sides of the two support plates are respectively provided with grooves, and the two grooves and the interval in the middle constitute a filter membrane accommodating groove; when in the filtration position, the projection contour of the first container or the second container and the two support plates in the horizontal plane are staggered.

4. The vacuum filtration device for water quality testing according to claim 3 is characterized in that: The horizontal drive is two screw motors, which are arranged in parallel and spaced apart. The two screw motors are respectively arranged on the outside of the first container or the second container, and the two support plates are respectively fixedly connected to the driving ends of the corresponding screw motors.

5. The vacuum filtration device for water quality testing according to claim 1, characterized in that: The main housing is provided with a feed port, and the feeding mechanism includes a paper pickup wheel and a pager, both of which are installed at the feed port, and the paper pickup wheel and the pager are respectively used for friction cooperation with the filter membrane, and the feed port is equipped with a feeding chute, and the feeding chute is opposite to the film connection position.

6. The vacuum filtration device for water quality testing according to claim 1, characterized in that: A first interface is provided at the top of the first container, and an injection pipe is connected between the first interface and the injection pump. A second interface is provided at the top of the second container, and a suction and pressure pipe is connected between the second interface and the suction and pressure pump. A third interface is provided at the bottom of the second container, and a drainage pipe is connected between the third interface and the drainage pump.

7. The vacuum filtration device for water quality testing according to claim 1, characterized in that: Two first liquid level sensors are arranged inside the first container, and the two first liquid level sensors are arranged at intervals in the upper and lower parts of the first container; two second liquid level sensors are arranged inside the second container, and the two second liquid level sensors are arranged at intervals in the upper and lower parts of the second container.

8. The vacuum filtration device for water quality testing according to claim 1, characterized in that: The film unloading structure is a film unloading top rod, the end of which protrudes from the upper part of the filter membrane accommodating groove. The end of the film unloading top rod is also provided with a guide surface, which extends obliquely upward from the filtration position to the film unloading position.

9. The vacuum filtration device for water quality testing according to claim 1, characterized in that: The opening and closing mechanism is a telescopic pneumatic suction cup, the telescopic direction of the telescopic pneumatic suction cup is arranged along the vertical extension, and the telescopic pneumatic suction cup is used for adsorption and cooperation with the dish cover.

10. The vacuum filtration device for water quality testing according to claim 1, characterized in that: A dish bin is installed outside the main housing, the dish bin is communicated with the collecting dish tank, and a bin position sensor is also arranged at the bottom of the dish bin.

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