CN214310012U

CN214310012U - Portable constant humidity measuring device

Info

Publication number: CN214310012U
Application number: CN202120445641.3U
Authority: CN
Inventors: 王鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-09-28
Anticipated expiration: 2031-03-01

Abstract

The utility model provides a portable constant humidity survey device relates to the drying equipment field. A portable constant humidity measuring device comprises a hard supporting plate, a framework, a transparent cover and gloves, wherein the transparent cover is covered on the framework and is in sealing connection with the hard supporting plate, a cavity is defined between the hard supporting plate and the transparent cover, operation openings are symmetrically formed in the transparent cover, openings of the gloves are communicated with the operation openings, and the gloves are located in the transparent cover. This portable constant humidity survey device can be light, carry easily and according to the equipment of demand equipment has solved the requirement of cosmetics water loss rate/moisture absorption rate testing to the constant humidity environment, can provide the constant humidity environment for a plurality of samples simultaneously to the door need not opened to the testing process, has reduced the humidity fluctuation in the testing process effectively.

Description

Portable constant humidity measuring device

Technical Field

The utility model relates to a drying equipment field particularly, relates to a portable constant humidity survey device.

Background

Moisture retention is one of the important properties of many skin care products and cosmetic raw materials, and the in vitro tests for detecting moisture retention are mainly moisture absorption rate measurement and water loss rate measurement. Both tests need to be carried out under specific humidity conditions (95% humidity for the moisture absorption rate test and 45% humidity for the water loss rate test). The main methods for humidity control currently include: the glass drier is made into a temporary humidistat for use in detection in a humidistat. The former needs specific equipment and is expensive, while the second latter has a simple device but has a small internal space and is difficult to satisfy the test of a large number of samples, and meanwhile, the two types of equipment need to open a constant humidity box door or a constant humidity box cover during measurement, take out or move the samples to an electronic balance to detect the weight, so that the constant humidity environment is communicated with the external environment in a short time, the maintenance of the humidity condition is not facilitated, and the result is unstable or even has larger error. Although the other small constant humidity box with the built-in balance can read the weight in real time without opening the equipment and well maintain the humidity environment, each equipment can only measure one sample, the existence of a control group and a parallel test greatly prolongs the test time, or more than 6 equipment are needed to carry out detection simultaneously, and the detection is not convenient enough. Therefore, there is a need for a test apparatus that can be manufactured at a low cost and that is suitable for testing a large number of samples and that maintains good humidity throughout the test.

The equipment for realizing the same requirement at present is large in size, heavy or inconvenient to carry, and a bin door needs to be opened for many times during detection, so that a large amount of water is lost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable constant humidity survey device, its equipment light, that carry easily and assemble according to the demand has solved cosmetics water loss rate moisture absorption rate testing to the requirement of constant humidity environment, can provide the constant humidity environment for a plurality of samples simultaneously to the hatch door need not be opened to the testing process, has reduced the humidity fluctuation in the testing process effectively.

The embodiment of the utility model is realized like this:

the embodiment of the application provides a portable constant humidity measuring device, including stereoplasm layer board, skeleton, translucent cover and gloves, above-mentioned translucent cover is established on above-mentioned skeleton, and above-mentioned translucent cover and above-mentioned stereoplasm layer board sealing connection, the limited formation cavity between above-mentioned stereoplasm layer board and the above-mentioned translucent cover, and the operation mouth has been seted up to the symmetry on the above-mentioned translucent cover, and the opening and the above-mentioned operation mouth intercommunication of above-mentioned gloves, above-mentioned gloves are located above-mentioned translucent cover.

In some embodiments of the present invention, the hard supporting plate includes a first plate body and a second plate body, and the first plate body is rotatably connected to the second plate body.

In some embodiments of the present invention, the frame includes a first frame body and a second frame body, the first frame body is rotatably connected to the first plate body, and the second frame body is rotatably connected to the second plate body.

The utility model discloses an in some embodiments, the sample mouth has been seted up on the lateral wall of above-mentioned translucent cover, and above-mentioned sample mouth upper shield is equipped with a body, and above-mentioned door body is connected with above-mentioned translucent cover, is provided with the sealing strip between above-mentioned door body and the translucent cover, and above-mentioned door body and above-mentioned sealing strip fixed connection, above-mentioned sealing strip can be dismantled with above-mentioned translucent cover and be connected.

The utility model discloses an in some embodiments, be provided with the fixed band on the above-mentioned stereoplasm layer board, above-mentioned fixed band includes first section and second section, and the head end of above-mentioned first section is fixed on above-mentioned first plate body, and the other end at above-mentioned second plate body is fixed to the head end of above-mentioned second section, and the connection can be dismantled to the tail end of above-mentioned first section and the tail end of above-mentioned second section.

The utility model discloses an in some embodiments, the tail end of above-mentioned first section and the tail end of above-mentioned second section are provided with detachable construction, and above-mentioned detachable construction includes that the magic is pasted, and above-mentioned magic is pasted including son face and mother face, and the tail end at above-mentioned first section is fixed to above-mentioned son face, and the tail end at above-mentioned second section is fixed to above-mentioned mother face.

In some embodiments of the present invention, a handle is disposed outside the first plate and the second plate.

In some embodiments of the present invention, a solution tank is disposed in the transparent cover, and the solution tank includes a first tank body and a second tank body.

In some embodiments of the present invention, a first mesh plate is disposed on the solution tank, and the first mesh plate is covered above the first tank body and the second tank body.

In some embodiments of the present invention, a support is disposed above the first mesh plate, a plurality of second mesh plates are disposed at intervals on the support, and the second mesh plates are distributed in a step.

Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:

an object of the utility model is to provide a portable constant humidity survey device, including stereoplasm layer board, skeleton, translucent cover and gloves, above-mentioned translucent cover is established on above-mentioned skeleton, and above-mentioned translucent cover and above-mentioned stereoplasm layer board sealing connection inject vacuole formation between above-mentioned stereoplasm layer board and the above-mentioned translucent cover, and the through-hole has been seted up to the symmetry on the above-mentioned translucent cover, the opening and the above-mentioned through-hole sealing connection of above-mentioned gloves, and above-mentioned gloves set up in above-mentioned translucent cover. The hard supporting plate is used for bearing the device in the transparent cover and can rotate around the middle part. The framework is made of two hard iron wires or steel wires and is used for supporting the transparent cover to prevent collapse. Through holes are symmetrically formed in the side wall of the transparent cover, the opening of the glove is in sealing connection with the through holes, a user can stretch a hand into the transparent cover through the glove to hold a sample, and a sealing rubber strip can be adopted to prevent gas in the transparent cover from exchanging with the outside.

Therefore, the portable constant-humidity measuring device is light and convenient, is easy to carry and transport, and the equipment assembled according to requirements meets the requirement of a cosmetic water loss rate/moisture absorption rate detection test on a constant-humidity environment. Secondly, can provide the constant humidity environment for a plurality of samples simultaneously to the testing process need not open the door, has reduced the humidity fluctuation in the testing process effectively.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic view of a bracket structure according to an embodiment of the present invention;

fig. 3 is a front view of an embodiment of the present invention;

fig. 4 is a side view of an embodiment of the present invention.

Icon: 1-sealing strip; 2-a framework; 3-a transparent cover; 4-fixing the belt; 5-a handle; 6-gloves; 7-an operation port; 8-a second mesh sheet; 9-a scaffold; 10-a hard pallet; 11-a first mesh sheet; 12-solution tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the present invention, and the embodiment provides a portable constant humidity measurement apparatus, including a hard support plate 10, a frame 2, a transparent cover 3 and a glove 6, where the transparent cover 3 is covered on the frame 2, the transparent cover 3 is hermetically connected to the hard support plate 10, a cavity is defined between the hard support plate 10 and the transparent cover 3, operation ports 7 are symmetrically formed on the transparent cover 3, an opening of the glove 6 is communicated with the operation ports 7, and the glove 6 is located in the transparent cover 3. The hard pallet 10 is used to support the devices inside the transparent cover 3, and the hard pallet 10 is foldable. The frame 2 is made of two hard iron wires or steel wires for supporting the transparent cover 3 and preventing the transparent cover from collapsing. The transparent cover 3 is symmetrically provided with operation ports 7, the opening of the glove 6 is hermetically connected with the operation ports 7, the glove 6 is arranged inside the transparent cover 3, the glove 6 is hermetically connected with the transparent cover 3, the glove 6 can extend into the sealed cover for operation, and the transparent cover 3 and the glove 6 can be connected by sealing rubber strips so that the moisture in the transparent cover 3 is not exchanged with the outside.

In some embodiments of the present invention, the hard splint 10 includes a first plate and a second plate, and the first plate and the second plate are rotatably connected. Above-mentioned stereoplasm layer board 10 divide into first plate body and second plate body, passes through hinged joint between above-mentioned first plate body and the above-mentioned second plate body, and above-mentioned hinge includes hinged support, pivot and the hinge body, and the fix with screw is on above-mentioned first plate body for the above-mentioned hinged support, and the fix with screw is on above-mentioned second plate body for the above-mentioned hinge body, and above-mentioned hinged support and above-mentioned hinge body pass through above-mentioned pivot rotatable coupling.

In some embodiments of the present invention, the frame 2 includes a first frame body and a second frame body, the first frame body is rotatably connected to the first board body, and the second frame body is rotatably connected to the second board body. Above-mentioned skeleton 2 is the steel wire structure, and the texture is hard, and its shape is square structure, and the second support body is with the material with first support body and with the structure. The first support body is rotatably connected with the first plate body, the second support body is rotatably connected with the second plate body, blind holes are formed in the front side wall and the rear side wall of the first plate body, and the head end and the tail end of the first support body can extend into the blind holes of the first plate body and can rotate freely in the blind holes. Similarly, the front side wall and the rear side wall of the second plate body are provided with blind holes, and the head end and the tail end of the second frame body can extend into the blind holes of the second plate body and can freely rotate in the blind holes. The inner wall of the transparent cover 3 is provided with a positioning belt, and the positioning belt can bind the framework 2 and fixedly connect the framework 2 with the transparent cover 3.

In some embodiments of this embodiment, a sample opening is opened on a side wall of the transparent cover 3, a door body is arranged on the sample opening upper cover, the door body is connected with the transparent cover 3, a sealing strip 1 is arranged between the door body and the transparent cover 3, the door body is fixedly connected with the sealing strip 1, and the sealing strip 1 is detachably connected with the transparent cover 3. Seted up the sample mouth on the lateral wall of above-mentioned translucent cover 3, can put into the inside of above-mentioned translucent cover 3 through this above-mentioned sample mouth with required experimental facilities, the linking department of above-mentioned sample mouth and above-mentioned translucent cover 3 seals whole translucent cover 3 through sealing strip 1, can avoid the loss and the entering of moisture content. The door body is fixedly connected with the sealing strip 1, and the sealing strip 1 is detachably connected with the transparent cover 3. The sealing strip 1 can be made of transparent adhesive tape, the transparent adhesive tape is a plastic product with strong viscosity, and the air permeability is poor, so that the sealing strip 1 is made of an ideal material.

In other embodiments, a waterproof zipper, which is a branch of a nylon zipper and is a nylon zipper subjected to some special treatment, may be selected at the joint of the sample port and the door body. Common feature processing means include: sticking a PVC film, sticking a TPU film, soaking in a waterproof agent, coating a waterproof zipper and the like. The waterproof zipper can effectively realize the opening and closing of the door body and isolate the external space and the cabin body.

In some embodiments of the present invention, a fixing strap 4 is disposed on the hard supporting plate 10, the fixing strap 4 includes a first section and a second section, a head end of the first section is fixed on the first plate, a head end of the second section is fixed on the other end of the second plate, and a tail end of the first section is detachably connected to a tail end of the second section. The fixing band 4 is sewn or adhered to the bottom surface of the hard pallet 10, and is used for fixing the hard pallet 10, so that the hard pallet is not scattered, the appearance is not affected, and the hard pallet is not convenient to place in a storage place. The detachable structure is applied to facilitate the detachment of the fixing band 4.

In some embodiments of this embodiment, the tail end of above-mentioned first section and the tail end of above-mentioned second section are provided with detachable construction, and above-mentioned detachable construction includes the magic subsides, and above-mentioned magic subsides include son face and mother face, and the tail end at above-mentioned first section is fixed to above-mentioned son face, and the tail end at above-mentioned second section is fixed to above-mentioned mother face. The magic tape industry term is called snap button. Is a common connecting auxiliary material for bags and clothes. It is divided into a male side and a female side: one side is made of soft fiber and the other side is made of elastic fiber with barbs. The male and female buckles are mutually buckled, under the condition of a certain transverse force, the hook with elasticity is straightened, loosens from the loop and is opened, then the original hook shape is recovered, and the opening and closing can be repeated for more than ten thousand times. In this embodiment, the magic is pasted very softly, and the magic is pasted relatively and is fit for using on the clothing to be the material of very environmental protection, the magic is pasted and is above-mentioned detachable construction's ideal structure.

In other embodiments, the detachable structure may be a backpack buckle, the backpack buckle includes an insert buckle and an insert slot, the insert buckle is fixed to the tail end of the first section, the insert slot is fixed to the tail end of the second section, and the insert buckle may be inserted into the insert slot or separated from the insert slot by pressing the insert buckle.

In some embodiments of the present invention, a handle 5 is disposed on an outer side of the first board and the second board. The handle 5 is disposed on the hard support plate 10, the handle 5 is rotatably connected to the hard support plate 10, the handle 5 includes a support, a handle and a rotating shaft, the handle is provided with a first shaft hole, the support is correspondingly provided with a second shaft hole, the rotating shaft can pass through the first shaft hole and the second shaft hole of the handle, the support of the handle 5 is fixed to the side of the hard support plate 10 by screws, and then the handle 5 can rotate freely around the rotating shaft.

In some embodiments of the present embodiment, a solution tank 12 is disposed in the transparent cover 3, and the solution tank 12 includes a first tank body and a second tank body. Be provided with solution tank 12 in the above-mentioned translucent cover 3, required solution goods when this solution tank 12 is used for placing the experiment, go up solution tank 12 physically and be an overall structure, easily take and put, be provided with the baffle in above-mentioned solution tank 12, evenly divide into first cell body and second cell body with above-mentioned solution tank 12. The different groove bodies can store different types of experimental liquid, and the experimental liquid can be recycled.

In some embodiments of this embodiment, the solution tank 12 is provided with a first mesh plate 11, and the first mesh plate 11 covers the first tank body and the second tank body. The solution tank 12 is provided with a first screen plate 11, and the screen plate is covered above the first tank body and the second tank body. The first net plate 11 is a hard net plate and is used for bearing a device placed above the first net plate 11, and the arrangement of the baffle plate can further prevent the hard net plate from being damaged, so that the service time of the first net plate 11 can be prolonged.

In this embodiment, depending on the effect of the saturated solution of a particular salt on the relative humidity at room temperature, a saturated solution tank 12 is provided in the closed transparent chamber to create a constant humidity environment and sufficient pluggable brackets 9 are provided to facilitate the testing operation.

In some embodiments of this embodiment, a support 9 is disposed above the first mesh plate 11, a plurality of layers of second mesh plates 8 are disposed at intervals on the support 9, and the second mesh plates 8 are distributed in a step shape. The bracket 9 is made of two vertical plastic plates, a plurality of through holes are formed in the vertical plastic plates, the bracket 9 is arranged above the solution tank 12, and the plurality of layers of second net plates 8 are correspondingly inserted into the through holes.

When the device is used, according to the influence of the saturated solution of the specific salt on the relative humidity at room temperature, a saturated solution tray is arranged in the closed transparent bin to create a constant-humidity environment, and a sufficient pluggable sample rack is arranged to facilitate test operation.

The device comprises a foldable closed bin, a solution tank 12 and a spliced sample rack. Wherein, collapsible closed bin comprises stereoplasm layer board 10, support 9, transparent dustcoat and latex gloves 6: the hard supporting plate 10 comprises two blocks with the same size, the middle parts of the two blocks are connected by a transparent film, the two blocks are used as planes for placing the solution tank 12 and the sample rack when the closed cabin is unfolded, the soft plastic film can be protected from being scratched when the closed cabin is folded, and the lifting handle and the fixing belt 4 on the supporting plate enable the folding cabin to be convenient to carry. The solution tank 12 is composed of a bottom tank and a screen plate, wherein a saturated solution is prepared by adding a specific salt (such as potassium carbonate) and water into the bottom tank, and the screen plate can support a balance and a sample frame and simultaneously can ensure that air can freely diffuse in a closed cabin and the upper part of the bottom tank. The concatenation formula sample frame is including controlling support frame and horizontal otter board, and the support frame is placed and is used for bearing the otter board on the otter board of solution tank 12 tops, and second otter board 8 is used for placing the sample, can place 1 to a plurality ofly according to sample quantity. When the device is used, the sealing strips 1 at the corner parts are firstly uncovered so that air can enter, the foldable closed bin is unfolded, the left film is uncovered, the bottom tank of the solution tank 12 is placed in the closed bin, required reagents and deionized water are added into the bottom tank, the screen plate is covered, the support frame of the sample rack is placed on the screen plate, and a proper number of screen plates are inserted. The balance, the sample bottle to be measured and the sampling tool are placed in the space between the screen plate of the solution tank 12 and the screen plate of the sample rack, the film is covered and sealed, and the measurement can be started after standing for 2 to 3 hours.

When not in use, the bracket 9 is taken out and disassembled, then the solution tank 12 is taken out, the solution in the solution tank 12 is cleaned, then the framework 2 is rotated to tighten the transparent cover 3 in the framework 2, the hard supporting plate 10 is rotated to press the transparent cover 3, and the whole cabin body is compressed. The son surface and the mother surface of the magic tape are well adhered, and the magic tape can be stored.

To sum up, the embodiment of the utility model provides a portable constant humidity survey device, including stereoplasm layer board 10, skeleton 2, translucent cover 3 and gloves 6, above-mentioned translucent cover 3 covers and establishes on above-mentioned skeleton 2, and above-mentioned translucent cover 3 and above-mentioned stereoplasm layer board 10 sealing connection inject vacuole formation between above-mentioned stereoplasm layer board 10 and the above-mentioned translucent cover 3, and operation mouth 7 has been seted up to the symmetry on the above-mentioned translucent cover 3, and the opening and the above-mentioned operation mouth 7 intercommunication of above-mentioned gloves 6, above-mentioned gloves 6 set up in above-mentioned translucent cover 3. The hard pallet 10 is used to support the devices inside the transparent cover 3, and the hard pallet 10 is foldable. The frame 2 is made of two hard iron wires or steel wires for supporting the transparent cover 3 and preventing the transparent cover from collapsing. The transparent cover 3 is symmetrically provided with operation ports 7, the opening of the glove 6 is hermetically connected with the operation ports 7, the glove 6 is arranged inside the transparent cover 3, the glove 6 is hermetically connected with the transparent cover 3, the glove 6 can extend into the sealed cover for operation, and the transparent cover 3 and the glove 6 can be connected by sealing rubber strips so that the moisture in the transparent cover 3 is not exchanged with the outside.

Therefore, the portable constant-humidity measuring device is light and convenient, is easy to carry and transport, and the equipment assembled according to requirements meets the requirement of a cosmetic water loss rate/moisture absorption rate detection test on a constant-humidity environment. Secondly, can provide the constant humidity environment for a plurality of samples simultaneously to the hatch door need not opened in the testing process, has reduced the humidity fluctuation in the testing process effectively.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a portable constant humidity survey device, its characterized in that, includes stereoplasm layer board, skeleton, translucent cover and gloves, the translucent cover is established on the skeleton, the translucent cover with stereoplasm layer board sealing connection, the stereoplasm layer board with inject the vacuole formation between the translucent cover, the operation mouth has been seted up to the symmetry on the translucent cover, the opening of gloves with operation mouth intercommunication, gloves are located in the translucent cover.

2. The portable constant humidity assay device of claim 1, wherein said rigid support plate comprises a first plate and a second plate, said first plate being rotatably coupled to said second plate.

3. The portable constant humidity assay device of claim 2, wherein the frame comprises a first frame body and a second frame body, the first frame body is rotatably connected to the first plate body, and the second frame body is rotatably connected to the second plate body.

4. The portable constant humidity measuring device according to claim 1, wherein a sample port is formed in a side wall of the transparent cover, a door body is arranged on the sample port, the door body is connected with the transparent cover, a sealing strip is arranged between the door body and the transparent cover, the door body is fixedly connected with the sealing strip, and the sealing strip is detachably connected with the transparent cover.

5. The portable constant humidity measurement device according to claim 2, wherein a fixing band is disposed on the rigid support plate, the fixing band comprises a first section and a second section, a head end of the first section is fixed on the first plate, a head end of the second section is fixed on the other end of the second plate, and a tail end of the first section is detachably connected to a tail end of the second section.

6. The portable constant humidity measurement device according to claim 5, wherein the tail end of the first section and the tail end of the second section are provided with detachable structures, the detachable structures comprise magic tapes, each magic tape comprises a sub surface and a mother surface, the sub surface is fixed at the tail end of the first section, and the mother surface is fixed at the tail end of the second section.

7. The portable constant humidity measurement device of claim 6, wherein a handle is disposed on the outer side of each of the first board and the second board.

8. The portable constant humidity assay device of claim 1, wherein a solution tank is disposed within the transparent enclosure, the solution tank comprising a first tank body and a second tank body.

9. The portable constant-humidity measuring device as claimed in claim 8, wherein a first screen is disposed on the solution tank, and the first screen is covered above the first tank and the second tank.

10. The portable constant-humidity measuring device as claimed in claim 9, wherein a support is disposed above the first screen plate, and a plurality of layers of second screen plates are disposed at intervals on the support, and the second screen plates are arranged in a step-like manner.