Positive pressure device of perforated plate

Abstract

The utility model relates to a porous plate positive pressure device which comprises a bearing table, a longitudinal moving mechanism, a transverse moving mechanism and a pressurizing mechanism, the bearing table is used for conveying and bearing a porous plate, the porous plate is provided with a plurality of air supply channels, and each air supply channel comprises a plurality of airflow holes; the longitudinal moving mechanism comprises a longitudinal driving source, a confluence plate and a pressing block. The pressing block is provided with open holes corresponding to the airflow holes in the air supply channels. The pressurizing mechanism comprises an air pump, first control valves and air pressure detection elements, the air pump is mounted on the mounting seat, the air pump is connected with each hole through a branch pipeline of the pipeline, and the first control valves and the air pressure detection elements corresponding to the holes are mounted on the confluence plate. According to the device, the bearing table, the longitudinal moving mechanism, the transverse moving mechanism and the pressurizing mechanism are matched with one another, pressure detection is adopted to control an independent gas supply channel, and a channel for completing an experiment is closed in advance; independent control over all the airflow holes is achieved through the first control valve, and only part of the airflow holes can be opened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid phase extraction or filtration, and in particular to a positive pressure device for a multi-well plate. BACKGROUND

[0002] In a common method for using a filter or solid phase extraction sieve plate, liquid in the sieve plate is caused to flow through the sieve plate by gravity acceleration (natural flow under gravity, greater than 1g gravity acceleration obtained by centrifugation) or a pressure difference system (positive pressure, negative pressure) so as to leave solids that cannot pass through the filter membrane of the sieve plate or substances that can be combined with groups on the sieve plate on the sieve plate. Taking a common existing negative pressure difference device as an example, a same vacuum source is usually used for 96 channels, and when liquid in a plurality of holes is exhausted, obvious pressure relief occurs, resulting in slow processing efficiency of the remaining holes. The negative pressure difference device usually needs a large vacuum device (vacuum pump, negative pressure tank, etc.) to ensure pressure supply for the remaining holes.

[0003] The existing simultaneous pressurization of a 96-well plate has the following disadvantages: 1. There is no feedback loop and independent flow channel pressure control, and the air paths of all pipelines are connected, so if liquid in a certain hole is completed early, the pressure difference of other holes will decrease together with the pressure of the hole, resulting in a lengthened overall experimental process; 2. The 96-well plate must be filled with liquid for each experiment, and if reagents are insufficient, water or other liquids must be added to fill the remaining hole positions in the 96-well plate, otherwise the accelerated filtration function cannot be realized; 3. A large-area pressing mechanism requires a very high pressing force to ensure sealing, or a larger device (such as an air compressor) is needed to provide a higher pressure and air flow, which is high in power consumption and large in size. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a positive pressure device for a multi-well plate, which is used to solve the technical problem that existing multi-well plates cannot be used for small channel opening work when filtering or performing solid phase extraction on products.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] In a first aspect, a positive pressure device for a multi-well plate is provided, comprising:

[0007] A carrying table is used to carry and transmit the multi-well plate, the multi-well plate is provided with a plurality of gas supply channels, each of the gas supply channels comprises a plurality of airflow holes, and the carrying table is arranged on a mounting seat;

[0008] A longitudinal moving mechanism is arranged on the mounting seat, the longitudinal moving mechanism comprises a longitudinal driving source arranged on the mounting seat, a bus bar and a pressing block arranged on the bus bar, the pressing block is provided with an opening corresponding to the airflow holes in each of the gas supply channels, and the longitudinal driving source drives the pressing block to move longitudinally through a first movement guide.

[0009] a lateral moving mechanism arranged on the mounting base, the lateral moving mechanism being configured to drive the carrier platform to move laterally so as to drive the multi-well plate to move directly below the pressing block;

[0010] a pressurizing mechanism arranged on the mounting base, the pressurizing mechanism being configured to pressurize the gas supply passages of the multi-well plate, the pressurizing mechanism comprising a gas pump, a first control valve and a gas pressure detecting element, the gas pump being mounted on the mounting base, the gas pump being connected with each of the openings through branch pipes of a pipe, the busbar being provided with the first control valve and the gas pressure detecting element corresponding to each of the openings, the first control valve being configured to control whether the gas supply passage between the branch pipe and each of the openings is open and to control the gas supply pressure, the gas pressure detecting element being configured to detect the gas pressure data of each of the openings.

[0011] Preferably, a sealing gasket is arranged below the pressing block for sealing, the sealing gasket being provided with through holes corresponding to each of the openings.

[0012] Preferably, the pressurizing mechanism further comprises a second control valve configured to control the gas pump to supply gas to all of the openings, the second control valve being mounted on the mounting base, the second control valve being arranged between the gas pump and the pipe.

[0013] Preferably, a buffering element configured to buffer the gas flow is arranged on the pipe between the second control valve and the gas pump.

[0014] Preferably, a distance detecting element configured to detect the distance between the bottom end surface of the pressing block and the top end surface of the multi-well plate is arranged on the pressing block.

[0015] Preferably, the lateral moving mechanism comprises a lateral driving source mounted on the mounting base and a second movement guide, the lateral driving source being connected with the carrier platform through a second transmission element.

[0016] Preferably, the longitudinal driving source is connected with the first movement guide through a first transmission element.

[0017] Preferably, the longitudinal driving source is a motor.

[0018] Preferably, the first control valve is an electromagnetic valve.

[0019] Preferably, the multi-well plate is provided with 8 gas supply passages, each of the gas supply passages comprising 12 gas flow holes.

[0020] The positive pressure device of the multi-well plate comprises a bearing table for conveying and bearing the multi-well plate, the multi-well plate is provided with a plurality of gas supply channels, each gas supply channel comprises a plurality of airflow holes, and the bearing table is arranged on a mounting seat; a longitudinal moving mechanism arranged on the mounting seat, the longitudinal moving mechanism comprises a longitudinal driving source mounted on the mounting seat, a bus bar and a pressing block mounted on the bus bar, the pressing block is provided with an opening corresponding to the airflow hole in each gas supply channel, and the longitudinal driving source drives the pressing block to move longitudinally through a first motion guide; a transverse moving mechanism arranged on the mounting seat, the transverse moving mechanism is used for driving the bearing table to move transversely to drive the multi-well plate to move directly below the pressing block; and a pressurizing mechanism arranged on the mounting seat, the pressurizing mechanism is used for pressurizing the gas supply channel of the multi-well plate, and the pressurizing mechanism comprises a gas pump, a first control valve and a gas pressure detection element, the gas pump is mounted on the mounting seat, the gas pump is connected with each opening through branch pipes of a pipeline, the bus bar is provided with the first control valve and the gas pressure detection element corresponding to each opening, the first control valve is used for controlling whether the gas supply passage between the branch pipe and each opening is open, and the gas pressure detection element is used for detecting the gas pressure data of each opening.

[0021] As can be seen from the above technical solutions, the positive pressure device of the multi-well plate has the following advantages: the positive pressure device of the multi-well plate cooperates with the bearing table, the longitudinal moving mechanism, the transverse moving mechanism and the pressurizing mechanism to realize the determination of which airflow holes the liquid flow is exhausted, that is, which experiments of the airflow holes are completed through pressure detection; the control of the single gas supply channel can be realized through pressure detection, and the channel of the completed experiment can be closed in advance; the first control valve is used for realizing the individual control of each airflow hole, and only part of the airflow holes can be opened; the multi-well plate is used for performing experiments on the multiple gas supply channels respectively, the effect of time-space exchange is realized, that is, the volume of the positive pressure device of the multi-well plate is reduced by increasing the pressurizing times, and the technical problem that the existing multi-well plate cannot be used for opening a small number of channels for filtering or solid phase extraction of products is solved.

[0022] The positive pressure device of the multi-well plate can perform more precise experiments on the airflow holes of the multi-well plate through the first control valve, the branch pipe, the gas pressure detection element and the airflow hole, and the problem that the liquid in the hole is not exhausted can occur with a lower probability; more precise control is realized, the required gas flux is low, a small-volume gas pump can meet the condition, and each experiment does not necessarily require all the airflow holes of the multi-well plate to be filled with liquid, a plurality of rows and a plurality of columns of airflow holes can be specified for experiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0024] Figure 1 A structural schematic diagram of a positive pressure device of a multi-well plate according to an embodiment of the present application;

[0025] Figure 2 A partial structural schematic diagram of a positive pressure device of a multi-well plate from another angle according to an embodiment of the present application;

[0026] Figure 3 A structural schematic diagram of a positive pressure device of a multi-well plate from yet another angle according to an embodiment of the present application,

[0027] Figure 4 A working schematic diagram of a gas supply passage of a pressurizing mechanism in a positive pressure device of a multi-well plate according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the embodiments described below only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0031] In the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connect", "fix", and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] In the present application, solid phase extraction is a commonly used sample pretreatment technique in analytical chemistry, which is used to purify and concentrate target analytes in samples. It is particularly suitable for sample preparation before liquid chromatography (HPLC), gas chromatography (GC) and mass spectrometry (MS) analysis.

[0033] In environmental science, solid phase extraction is used to monitor pollutants in environmental samples (such as water, soil and air), including organic pollutants and heavy metals, etc. Through solid phase extraction SPE, target pollutants can be effectively extracted from complex environmental matrices, facilitating subsequent quantitative analysis.

[0034] In the biomedical field, solid phase extraction is used to extract and purify drugs, metabolites and other bioactive molecules in biological samples (such as blood, urine and tissue extracts). This is of great significance for drug monitoring, disease marker identification and biological sample analysis.

[0035] Solid phase extraction is used in food analysis and agricultural research to detect additives, residual pesticides and food contaminants in food. Through solid phase extraction SPE, food safety and quality control can be ensured, and chemical substances in crops can be monitored.

[0036] The embodiments of the present application provide a positive pressure device for multi-well plate, which solves the technical problem that the existing multi-well plate cannot be used for small channel opening work when filtering or solid phase extraction of products.

[0037] Embodiment one:

[0038] As shown in Figures 1 to 3 The embodiments of the present application provide a positive pressure device for multi-well plate, which includes a mounting seat 10, a bearing table 20, a longitudinal movement mechanism 30, a transverse movement mechanism 40 and a pressurizing mechanism 50.

[0039] In the embodiments of the present application, the mounting seat 10 is used to support the bearing table 20, the longitudinal movement mechanism 30, the transverse movement mechanism 40 and the pressurizing mechanism 50.

[0040] In the embodiment of the present application, the bearing table 20 is used to convey and bear the multi-well plate 60. The multi-well plate 60 is provided with a plurality of gas supply channels 61, and each gas supply channel 61 includes a plurality of airflow holes 62.

[0041] It should be noted that the bearing table 20 is mainly used to convey and bear the multi-well plate 60. For example, the bearing table 20 can be a tray. In the working state, the bearing table 20 drives the multi-well plate 60 to move continuously in the set direction. In the embodiment, the bearing table 20 drives the multi-well plate 60 to move continuously in the set direction in the transverse direction. The multi-well plate 60 is provided with 8 gas supply channels 61, and each gas supply channel 61 includes 12 airflow holes 62. The bearing table 20 is internally provided with a pressure sensor, which can avoid damage to the equipment or consumables caused by excessive pressure due to machine failure.

[0042] In the embodiment of the present application, the longitudinal moving mechanism 30 is arranged on the mounting seat 10, and the longitudinal moving mechanism 30 includes a longitudinal driving source 31 arranged on the mounting seat 10, a bus plate 32, and a pressing block 33 arranged on the bus plate 32. The pressing block 33 is provided with an opening corresponding to the airflow hole 62 in each gas supply channel 61, and the longitudinal driving source 31 drives the pressing block 33 to move longitudinally through a first motion guide 34. The longitudinal driving source 31 is connected with the bus plate 32 through a first transmission element 35. The first motion guide 34 is arranged on the mounting seat 10. The bus plate 32 is connected with the first transmission element 35.

[0043] It should be noted that the longitudinal driving source 31 can be selected as a motor, and the first transmission element 35 can be a synchronous belt. The motor drives the first transmission element 35 to move, which drives the bus plate 32 to move. The movement of the bus plate 32 is limited by the first motion guide 34, so that the bus plate 32 and the pressing block 33 fixed on the bus plate 32 move longitudinally under the driving action of the motor and the limiting action of the first motion guide 34. In other embodiments, the longitudinal moving mechanism 30 can also adopt other structures such as a motor cooperating with a gear rack, a motor cooperating with a lead screw, and a cylinder cooperating with a guide rail to realize the driving of the pressing block 33 to move up and down.

[0044] In the embodiment of the present application, the transverse moving mechanism 40 is arranged on the mounting seat 10, and the transverse moving mechanism 40 is used to drive the bearing table 20 to move transversely, so as to drive the multi-well plate 60 to move to the position directly below the pressing block 33. The transverse moving mechanism 40 includes a transverse driving source 41 arranged on the mounting seat 10 and a second motion guide 42. The transverse driving source 41 is connected with the bearing table 20 through a second transmission element 43, and the movement of the bearing table is limited by the second motion guide 42.

[0045] It should be noted that the transverse driving source 41 can be a motor, the second transmission element 43 can be a synchronous belt, the second motion guide 42 is installed on the mounting base 10, and the carrier table 20 is connected with the second transmission element 43. When the transverse moving mechanism 40 works, the motor drives the synchronous belt to drive the carrier table 20 to move, and drive the multi-hole plate 60 to move to the position directly below the pressing block 33. In other embodiments, the transverse moving mechanism 40 can also adopt other structures such as motor and gear rack cooperation, motor and screw cooperation, and cylinder and guide rail cooperation to realize the driving of the transverse movement of the carrier table 20. The movement of the carrier table 20 is limited by the second motion guide 42 to move transversely, so as to realize the movement of the multi-hole plate 60 to the position directly below the pressing block 33.

[0046] As shown in Figures 1 to 3 In the embodiment of the present application, the pressing mechanism 50 is arranged on the mounting base 10, and the pressing mechanism 50 is used for pressurizing the gas supply passage 61 of the multi-hole plate 30. The pressing mechanism 50 comprises a gas pump 51, a first control valve 52 and a gas pressure detection element 53. The gas pump 51 is installed on the mounting base 10, and the gas pump 51 is connected with each opening through a branch pipeline 54 of the pipeline. The first control valve 52 and the gas pressure detection element 53 corresponding to each opening are installed on the bus plate 32. The first control valve 52 is used for controlling whether the gas supply passage between the branch pipeline 54 and each opening is open and controlling the gas supply pressure. The gas pressure detection element 53 is used for detecting the gas pressure data of each opening.

[0047] It should be noted that the first control valve 52 can be an electromagnetic valve. The gas pressure detection element 53 can be a gas pressure sensor. When the pressing mechanism 50 works, the gas pump 51 provides gas for the gas supply passage 61 to pressurize. The pressure is divided to each gas flow hole 62 through the bus plate 32, and is applied to the liquid surface of the corresponding gas flow hole 62 of the multi-hole plate 60 through the opening of the pressing block 33. After the liquid in the gas flow hole 62 of the multi-hole plate 60 is pressed out, the gas pressure of the corresponding gas flow hole 62 is obviously changed, and the gas pressure data is lower than that of other gas flow holes 62. After the gas pressure detection element 53 detects the pressure change, the first control valve 52 corresponding to the gas flow hole 62 is closed, the overall gas pressure of the gas supply passage 61 rises, and the experiment of other gas flow holes 62 can continue.

[0048] As shown in Figure 4 In the embodiment of the present application, the task of pressurizing the multi-hole plate 60 is divided into 8 gas supply passages 61 in the way of time for space. Each time, 12 gas flow holes 62 in each gas supply passage 61 of the multi-hole plate 60 are pressurized. In this way, the gas consumption is small, and under the same sealing pressure, the required pressure is also reduced due to the reduction of the sealing area. The longitudinal moving mechanism 30 and the transverse moving mechanism 40 are more easily realized lightweight, and the occupied volume is reduced.

[0049] It should be noted that in the process of experiment by using the positive pressure device of the porous plate, if the experiment of a gas flow hole 62 is completed, the flow rate of the gas flow in the gas supply channel of the other gas flow holes 62 of the same gas supply passage 60 increases, the gas pressure data of the pressure detection element 53 obviously decreases, and the decrease is greater than the pressure of the other gas flow holes 62. The change is detected by the pressure detection element 53, and the first control valve 52 of the corresponding gas supply channel is closed to avoid the influence of the gas supply channel on the other gas supply channels.

[0050] As shown in the following figure, the gas supply passage is divided into 12 paths, which are respectively controlled by 12 electromagnetic valves. Each individual gas supply passage is monitored by a separate gas pressure sensor.

[0051] As shown in the following figure, the gas supply passage is divided into 12 paths, which are respectively controlled by 12 electromagnetic valves. Each individual gas supply passage is monitored by a separate gas pressure sensor. Figures 1 to 3 As shown in the following figure, the gas supply passage is divided into 12 paths, which are respectively controlled by 12 electromagnetic valves. Each individual gas supply passage is monitored by a separate gas pressure sensor. As shown in the following figure, the gas supply passage is divided into 12 paths, which are respectively controlled by 12 electromagnetic valves. Each individual gas supply passage is monitored by a separate gas pressure sensor. After the liquid in the gas flow hole 62 of the porous plate 60 is completely pressed out, the gas pressure of the gas flow hole 62 obviously changes, and the pressure is lower than that of the other gas flow holes 62. After the pressure detection element 53 detects the pressure change, the first control valve 52 corresponding to the gas flow hole 62 is closed, the overall gas pressure of the gas supply passage 61 rises, and the experiment of the other gas flow holes 62 can continue. After the experiments of the 12 gas flow holes 62 of the entire row of gas supply passages 61 are completed, the pressure block 33 is lifted by the vertical moving mechanism 30, and the gas flow holes 62 of the next gas supply passage 61 are aligned with the openings of the pressure block 33 by the horizontal driving source 41 and the second motion guide 42. Then a new round of experiments of 12 gas flow holes 62 is performed. After the experiments of the 8 gas supply passages 61 of the porous plate 60 are completed, the horizontal driving source 41 and the second motion guide 42 drive the bearing table 20 to return to the initial position.

[0052] The application provides a positive pressure device for a multi-well plate, which comprises a bearing table for conveying and bearing the multi-well plate, the multi-well plate is provided with a plurality of gas supply channels, each gas supply channel comprises a plurality of airflow holes, and the bearing table is arranged on a mounting seat; a longitudinal moving mechanism arranged on the mounting seat, the longitudinal moving mechanism comprises a longitudinal driving source mounted on the mounting seat, a bus bar and a pressing block mounted on the bus bar, the pressing block is provided with an opening corresponding to the airflow hole in each gas supply channel, and the longitudinal driving source drives the pressing block to move longitudinally through a first motion guide; a transverse moving mechanism arranged on the mounting seat, the transverse moving mechanism is used for driving the bearing table to move transversely, so as to drive the multi-well plate to move directly below the pressing block; and a pressurizing mechanism arranged on the mounting seat, the pressurizing mechanism is used for pressurizing the gas supply channels of the multi-well plate, and the pressurizing mechanism comprises an air pump, a first control valve and an air pressure detection element, the air pump is mounted on the mounting seat, the air pump is connected with each opening through branch pipes of a pipeline, the bus bar is provided with the first control valve and the air pressure detection element corresponding to each opening, the first control valve is used for controlling whether the gas supply passage between the branch pipe and each opening is open, and the air pressure detection element is used for detecting the air pressure data of each opening. The positive pressure device for the multi-well plate realizes the determination of which liquid flow of the airflow holes is exhausted, that is, which experiment of the airflow holes is ended, through the cooperation of the bearing table, the longitudinal moving mechanism, the transverse moving mechanism and the pressurizing mechanism; the control of the single gas supply channel can be realized through pressure detection, the channel completing the experiment can be closed in advance; the single control of each airflow hole can be realized through the first control valve, and only part of the airflow holes can be opened; the multi-well plate is subjected to experiments of the multiple gas supply channels respectively, the effect of time-space exchange is realized, that is, the volume of the positive pressure device for the multi-well plate is reduced in the mode of increasing the pressurizing times, and the technical problem that the existing multi-well plate cannot be used for small-channel opening work in the filtration or solid-phase extraction of products is solved.

[0053] It should be noted that the control of the single gas supply channel adopts the Bernoulli principle, that is, the pressure of the pipe with high flow rate in the branch pipe is small. The positive pressure device for the multi-well plate can perform more delicate experiments on the airflow holes of the multi-well plate through the first control valve, the branch pipe, the air pressure detection element and the airflow hole, and the problem of not exhausting the liquid in the hole can occur with a lower probability; more delicate control is realized, the required gas flux is low, the required pressure difference is small, a small-volume air pump can meet the conditions; and the device is more flexible, and it is not necessary to fill the liquid in all the airflow holes of the multi-well plate in each experiment, and a plurality of rows and a plurality of columns of airflow holes can be specified for experiments.

[0054] As shown in the embodiment of the application, Figure 2 As shown in the embodiment of the application,

[0055] It should be noted that the sealing pad 36 is mounted on the bottom end face of the pressing block 33.

[0056] like Figure 2 As shown, in one embodiment of this application, the pressurizing mechanism 50 further includes a second control valve 55 for controlling the air pump 51 to supply air to all openings. The second control valve 55 is mounted on the mounting base 10 and is disposed between the air pump 51 and the pipeline. A buffer element 56 for buffering airflow is provided on the pipeline between the second control valve 55 and the air pump 51.

[0057] It should be noted that the second control valve 55 can be a proportional valve. The buffer element 56 can be a buffer bottle.

[0058] like Figure 2 As shown, in one embodiment of this application, the pressure block 33 is provided with a distance detection element 331 for detecting the distance between the bottom end surface of the pressure block 33 and the top end surface of the perforated plate 60.

[0059] It should be noted that the distance detection element 331 can detect the height of the object being tested before the experiment begins, and confirm the specifications of the test consumable (such as whether the perforated plate is half-skirted or full-skirted). If the perforated plate is not placed due to misoperation, it can also provide an error message and terminate the experiment, saving time and avoiding damage to the instrument.

[0060] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A positive pressure device for a perforated plate, characterized in that, include: A support platform is used to convey and support a perforated plate, the perforated plate being provided with several air supply passages, each of which contains several airflow holes, and the support platform is mounted on a mounting base. A longitudinal moving mechanism is provided on the mounting base. The longitudinal moving mechanism includes a longitudinal drive source, a manifold, and a pressure block installed on the manifold. The pressure block is provided with an opening corresponding to the airflow hole in each of the air supply passages. The longitudinal drive source drives the pressure block to move longitudinally through a first motion guide. A lateral moving mechanism is provided on the mounting base. The lateral moving mechanism is used to drive the support platform to move laterally, so as to move the perforated plate to directly below the pressure block. A pressurizing mechanism is disposed on the mounting base. The pressurizing mechanism is used to pressurize the air supply passage of the perforated plate. The pressurizing mechanism includes an air pump, a first control valve, and an air pressure detection element. The air pump is mounted on the mounting base and is connected to each of the openings through a branch pipe. The manifold is equipped with the first control valve and the air pressure detection element corresponding to each of the openings. The first control valve is used to control whether the air supply passage between the branch pipe and each of the openings is connected and to control the air supply pressure. The air pressure detection element is used to detect the air pressure data of each of the openings.

2. The positive pressure device for the perforated plate according to claim 1, characterized in that, A sealing gasket for sealing is provided below the pressure block, and the sealing gasket has through holes corresponding to each of the openings.

3. The positive pressure device for the perforated plate according to claim 1, characterized in that, The pressurization mechanism further includes a second control valve for controlling the air pump to supply air to all the openings. The second control valve is mounted on the mounting base and is located between the air pump and the pipeline.

4. The positive pressure device for the perforated plate according to claim 3, characterized in that, A buffer element for buffering airflow is provided on the pipe between the second control valve and the air pump.

5. The positive pressure device for a perforated plate according to any one of claims 1-4, characterized in that, The pressure block is provided with a distance detection element for detecting the distance between the bottom end face of the pressure block and the top end face of the perforated plate.

6. The positive pressure device for a perforated plate according to any one of claims 1-4, characterized in that, The lateral movement mechanism includes a lateral drive source and a second motion guide mounted on the mounting base, wherein the lateral drive source is connected to the support platform via a second transmission element.

7. The positive pressure device for a perforated plate according to any one of claims 1-4, characterized in that, The longitudinal drive source is connected to the first motion guide via a first transmission element.

8. The positive pressure device for a perforated plate according to any one of claims 1-4, characterized in that, The longitudinal drive source is an electric motor.

9. The positive pressure device for a perforated plate according to any one of claims 1-4, characterized in that, The first control valve is a solenoid valve.

10. The positive pressure device for a perforated plate according to any one of claims 1-4, characterized in that, The perforated plate is provided with 8 air supply passages, and each air supply passage contains 12 airflow holes.

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