CN212789921U - Water mould - Google Patents

Abstract

The utility model discloses a water mould, including the water mould baffle, two terminal surfaces have the water mould water containing portion of caving in around it to form the filtration chamber with the diaphragm layer, the water mould frame portion that the terminal surface is located outside the water mould water containing portion is fixed with the portion of compressing tightly, covers water mould frame portion the diaphragm layer is at least partly fixed by portion of compressing tightly and water mould frame portion centre gripping, and the diaphragm layer is the closed banding that has certain width by the part of centre gripping. The beneficial effects of the utility model reside in that, can solve among the prior art diaphragm layer impaired and the lower condition of water mould filter-pressing efficiency easily.

Description

Water mould

Technical Field

The utility model relates to a water mould mainly uses in the technical field of mud filter-pressing.

Background

A mechanical device for dialyzing liquid by applying a certain pressure to a subject by using a special filter medium in a filter press is a common solid-liquid separation device. The filter mechanism of pressure filter comprises a plurality of material membranes and water molds arranged side by side in turn, adjacent material membranes and water molds are pressed by a pressing mechanism of the pressure filter, mud is injected into a material containing chamber between a material membrane clapboard and filter cloth, the water of a preliminary filter pressing filtering part of the mud is filtered by the material containing chamber, then the filter pressing water is injected into a filter pressing chamber between the water mold clapboard and a diaphragm layer, the water is filter-pressed by the gradual expansion of the filter pressing chamber, the final mud forms a cake, the extrusion filtering of the filter pressing chamber is the most main filter pressing means, and the filtering effect of the mud is determined.

In the prior art, the part of the diaphragm layer that is located the terminal surface scope of water mould baffle covers and not fixes the terminal surface, the sealed of pressure filtration room relies on compressing tightly between water mould and the material mould, consequently the impurity that carries by the pressure filtration water especially solid particle impurity gets into easily between the part of diaphragm layer and the water mould baffle terminal surface correspondence diaphragm layer, this part that will cause the diaphragm layer to be compressed tightly is the non-level form, and appear warping or even damaged problem under the high pressure extrusion, the leakproofness of pressure filtration room suffers destruction, and the filter-pressing effect that makes mud material receive receives the influence. In addition, the opening between the water mold and the material mold can release the sealing of the filter pressing chamber, so that the filter pressing water in the filter pressing chamber must be emptied after the filter pressing is completed, if the water mold and the material mold are opened in advance, the filter pressing water can seep out from between the diaphragm layer and the end surface of the water mold partition plate and permeate into a filter cake, and the time for emptying the filter pressing water in the filter pressing chamber is long, so that the filter pressing efficiency is influenced.

For example, the prior art publication No. CN104225985A discloses a high-pressure filter pressing device, wherein at least one of two side surfaces of a water mold is provided with a water mold material accommodating portion, the water mold material accommodating portion is provided with a plurality of water inlet holes, one end of a water inlet main channel is used as an inlet of the water mold, the other end of the water inlet main channel extends towards the inside of the water mold and is communicated with the water inlet holes, the surface of the water mold material accommodating portion is sequentially covered with a diaphragm rubber sheet and a water mold filter cloth, and a boss for compressing the diaphragm rubber sheet, the water mold filter cloth and the material mold filter cloth to realize a sealing effect is further arranged along the edge of the water mold material accommodating portion, so that the sealing performance of the material mold and the water mold during mold closing. The diaphragm rubber (diaphragm layer) of the water mold covers the surface of the material accommodating part of the water mold, the sealing between the diaphragm rubber and the side surface of the water mold is not sealed, the sealing of the filter pressing chamber completely depends on the mutual pressing of the lug boss of the water mold and the material film during mold closing, and the technical problems mentioned above are not solved.

For example, the prior art publication No. CN107050947A discloses a deep dehydration filter press device, wherein both side surfaces of a membrane filter plate are provided with concave arc-shaped or bending-shaped material containing parts, one side of a non-membrane filter plate facing the membrane filter plate is covered with filter cloth, a punching plate is arranged between the filter cloth and the non-membrane filter plate, both side surfaces of the membrane filter plate are covered with elastic membranes, the membranes can be solid membranes or hollow membranes, the fixed connection points of the membranes and the membrane filter plate are located outside the water containing cavity and can be only arranged on the top surface of the membrane filter plate or the side surface of the top frame, the other end of the membrane falls freely and vertically, and when the membrane filter plate is attached to the non-membrane filter plate, the membranes are clamped between. Although the membrane (membrane layer) and the membrane filter plate (water mold partition) have fixed connection points, the fixed connection points are not located at the edge of the membrane and the membrane filter plate forming the filter chamber, and the membrane filter plate are fixedly connected in points and are not sealed, so that the above-mentioned problems are not solved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a water mould, can solve among the prior art diaphragm layer easy impaired and the lower condition of water mould filter-pressing efficiency.

The utility model discloses a realize through following technical scheme.

The utility model provides a water mould, includes the water mould baffle, its front and back two terminal surfaces have the water mould portion of holding that caves in to form the filtration chamber with the diaphragm layer, the water mould frame portion that the terminal surface lies in outside the water mould portion of holding is fixed with the portion of compressing tightly, covers the water mould frame portion the diaphragm layer is fixed by compressing tightly portion and water mould frame portion centre gripping at least partly, and the part that the diaphragm layer was held is the closed banding that has certain width.

Among the prior art, most solid particle impurity is carried the entering by the filter-pressing water and remains in the filter-pressing room, for example sand grain, clay etc., solid particle impurity gets into behind between diaphragm layer and the water mould frame portion, the phenomenon of local "swell" can appear in the diaphragm layer, under the high pressure of compound die, cause the diaphragm layer deformation (most for irreversible deformation) of "swell" department even the damaged by the open-ended condition, on the one hand the life of diaphragm layer shortens, on the other hand the diaphragm layer through irreversible damage probably influences the leakproofness of filter-pressing room, the infiltration phenomenon appears when pouring into the pressure filtration promptly, the filter-pressing effect that leads to the mud material receives great influence. The utility model discloses a, no matter the water mould is in the compound die state (sticis between water mould and the material mould) or the non-compound die state (open between water mould and the material mould), because the diaphragm layer part that covers water mould frame portion is fixed by the centre gripping, the filter-pressing room is in encapsulated situation all the time, and solid particle impurity can't get into between diaphragm layer and the water mould frame portion, has solved relevant technical problem.

In addition, when the water mold is in a non-mold closing state, the filter pressing chamber is still in a closed state, so that filter pressing water in the filter pressing chamber does not need to be completely drained after filter pressing is completed, only a pipeline for injecting the filter pressing water is released, the water mold and the material mold are opened, and a material cake is unloaded, and the filter pressing water is generally required to be completely drained from the medium-pressure filter chamber in the prior art, namely about 10 minutes.

As a further improvement, two terminal surfaces of the water model baffle are provided with a water model permeable layer, which is fixed on the outer end surface of the pressing part back to the water model frame part, the water model permeable layer has certain maintainable thickness and circulated water.

As a further improvement of the utility model, the water mould permeable bed includes the multilayer screen cloth of fixing side by side, consequently has certain thickness, divide into wire class or cellosilk class to the material of screen cloth usually, and high pressure effect when considering the compound die needs to possess certain high compressive strength, preferred wire class material, and the water mould permeable bed still can maintain its thickness unchangeable and can hold the water circulation under the compound die state. The water mould permeable layer mainly cooperates with the material film, the water mould and the material mould are mutually compressed and are in the compound die state after, thereby the mud material receives the water that holds the material room self extrusion filter-pressing or receives the water that the filter-pressing room extrudeed the filter-pressing, and one of them part can be discharged by water mould permeable layer, has increased a drainage channel promptly outside the original wash port of material mould, consequently can improve the filter-pressing efficiency of mud material.

It is particularly noted that in the prior art, the installation of the permeable layer of the water mold cannot be realized. Because if do not have the portion of compressing tightly, water mould permeable bed contacts with the diaphragm layer, material mould, water mould permeable bed, diaphragm layer, water mould frame portion are compressed tightly during the compound die, and the screen cloth that is worked out by the wire class on water mould permeable bed, its surface is not the smooth surface but latticed rough surface, consequently will certainly lead to the fact the damage to the diaphragm layer under the high pressure effect. Moreover, the screen of the permeable layer of the water mold is not a flat surface, but an irregular curved surface, even if the pressed part of the permeable layer of the water mold is flattened in the mold closing state, the extrusion acting force of the permeable layer of the water mold on the diaphragm layer still has interval change, and the damage of the diaphragm layer is also aggravated.

In addition, the mud slurry is gradually filtered by the water-material mixture during the filter pressing process to finally form a solid filter cake, the mud slurry contains more solid matter components, and if sharp solid matter (such as block-shaped or granular rock) is exposed on the surface of the gradually drained mud slurry, the situation that the diaphragm layer is easily punctured can occur. And the utility model discloses the water mould permeable bed that sets up between diaphragm layer and filter cloth then can solve this problem, and the water mould permeable bed can also play the guard action to the diaphragm layer to avoid "mud material" local sharp-pointed surface direct action at the diaphragm layer.

As the utility model discloses a further improvement, the at least partly naked exposure of water mould permeable bed the terminal surface of water mould baffle, the part of naked exposure have better guidance quality to rivers for drainage speed.

As the utility model discloses a further improvement, the portion of compressing tightly is the closed structure, its dorsad the outer terminal surface of water model baffle is enclosed gradually the uplift by interior to well, and the water model frame portion of most of water model baffles is square frame shape, then corresponding portion of compressing tightly also is square frame's structure, and the structural shape of the outer terminal surface of portion can be sunken to water model baffle orientation with receiving the regional guide in middle part that holds material room extruded water model permeable layer, consequently can improve the volume that holds of holding material room with the maximize, can improve the injection total amount of mud material.

As a further improvement of the utility model, the interior terminal surface of portion that compresses tightly, its interior periphery to well enclose the part with the surface of water model frame portion has the clearance, because the outer terminal surface of portion that compresses tightly is enclosed the uplift gradually by interior to well, consequently the thickness of portion that compresses tightly is enclosed to well by interior and increases gradually, consequently if the interior terminal surface of portion that compresses tightly contacts completely and compresses tightly the diaphragm layer, then the pressure of the interior terminal surface of portion that encloses to well by interior is less than other parts to the pressure of this part also is the gradient along with thickness and changes, consequently with setting up the clearance between this part and the water model frame portion, reduce the total area that compresses tightly the portion contact diaphragm layer, increase pressure in order to obtain the more firm fixed effect of diaphragm layer under the unchangeable condition of compound die total pressure.

As a further improvement of the utility model, the clearance by the interior of compressing tightly terminal surface encloses to well and reduces gradually, is located the diaphragm layer of clearance department when the filter-pressing room fills up the filter-pressing water promptly and hugs closely compressing tightly terminal surface in the terminal under the extrusion of filter-pressing water, and this part diaphragm layer is the slope form promptly, and consequently the dog-ear that the diaphragm layer is located the department of compressing tightly terminal enclosure is the obtuse angle to this dog-ear is compared and is not had clearance or clearance size unchangeable slightly big some, can alleviate the effort of similar "cutting" that this department diaphragm layer received.

As the utility model discloses a further improvement, compress tightly the portion with water mould frame portion is by a plurality of fastener fixed connection, though the utility model discloses an above each technical scheme has alleviateed the loss of diaphragm layer, prolongs its life, but the diaphragm layer still is the consumable part, consequently will compress tightly portion and water mould frame portion fixed connection mode through the fastener and be convenient for dismantle in order to change or to maintain the diaphragm layer.

As a further improvement, the utility model discloses a surface of water model frame portion the portion of compressing tightly faces the interior terminal surface of water model frame portion is equipped with at least a pair of joint complex protrusion structure/indent structure, indent structure/protrusion structure, not only increases the diaphragm layer by the area of clamping part, has also strengthened the effect of the fixed diaphragm layer of centre gripping moreover.

As a further improvement, be equipped with at least one main way of intaking in the water mould baffle, water mould frame portion with be connected with water mould connecting portion between the water mould holding portion, the lower part of water mould connecting portion with the main way of intaking is connected with at least one branch way of intaking, and press drainage pours into the pressure filter chamber into by the lower part of water mould baffle terminal surface promptly, pours into the pipeline release of press drainage and when the material mould pours into mud material into, and the pressure filter chamber receives the extrusion, is favorable to partial pressure drainage to need to flow back through the branch way of intaking and the main way of intaking.

As a further improvement, be equipped with at least one water inlet main in the water model baffle, water model holding capacity portion with the water inlet main is connected with at least one water inlet branch way, and press drainage water pours into the pressure filtration room into by the middle part of water model baffle terminal surface promptly, and consequently the lower part is comparatively symmetrical when outwards expanding in pressure filtration room, and is comparatively even to holding the extrusion of material indoor mud material promptly.

The utility model has the advantages that:

(1) the utility model is provided with the compressing part and fixes the diaphragm layer between the end face of the water mould clapboard and the compressing part, and the filter pressing chamber is a sealed space no matter in a matched die state or a non-matched die state, thereby avoiding the damage of the diaphragm layer caused by the solid particle impurities entering between the diaphragm layer and the water mould clapboard;

(2) the utility model discloses because the filter-pressing room is the encapsulated situation all the time, therefore only need release pressure and needn't empty the filter-pressing water after accomplishing the filter-pressing, the drainage time is shortened, and the water injection time of filter-pressing room is shortened after having poured into the mud material into, both combine to shorten the consuming time of single filter-pressing by a wide margin, improved the filter-pressing efficiency;

(3) the utility model discloses a set up the water mould permeable stratum outside diaphragm layer and clamping part, can provide extra drainage channel for the material membrane during filter-pressing, improved filter-pressing efficiency and filter-pressing effect, the water mould permeable stratum is fixed mounting can not cause the damage to the diaphragm layer in addition in clamping part;

(4) the water-model permeable layer of the utility model can also play a role in protecting the diaphragm layer, so as to avoid the diaphragm layer from being punctured by mud materials which are gradually solidified, and can realize high-pressure injection pressure filtration water of the pressure filtration chamber based on the protection mechanism, so that the extrusion acting force of the pressure filtration chamber on the material containing chamber is improved, namely, the pressure filtration efficiency and the pressure filtration effect can be improved;

(5) the utility model discloses a portion that compresses tightly, the shape of its outer terminal surface sets up the guide water mould permeable bed and inwards caves in, and the maximize improves the mud material injection volume of material membrane, sets up the clearance between its inner end face portion and the water mould frame portion, can balance the pressure of portion that compresses tightly to diaphragm layer and water mould frame portion to strengthen the diaphragm layer by centre gripping fixed state's stability.

Drawings

The preferred embodiments of the present invention will hereinafter be described in detail to facilitate an understanding of the objects and advantages of the invention, with reference to the accompanying drawings, in which:

FIG. 1 is an exploded view of a water mold according to example 1;

FIG. 2 is a schematic structural view of a water mold separator according to embodiment 1;

FIG. 3 is a schematic diagram of the division of the diaphragm layer in embodiment 1;

FIG. 4 is a schematic partial sectional view of a water mold according to embodiment 1;

FIG. 5 is an enlarged partial view of portion B of FIG. 4 after water is injected into the water mold to press the water out;

FIG. 6 is a schematic partial cross-sectional view of a permeable layer of a water mold according to embodiment 1;

FIG. 7 is a schematic sectional view of the water inlet main passage and the water inlet branch passage in the embodiment 1;

FIG. 8 is an enlarged view of part A of FIG. 2;

FIG. 9 is a schematic sectional view of the water inlet main passage and the water inlet branch passage in the embodiment 2.

Detailed Description

The invention is explained in more detail below with reference to the drawings and exemplary embodiments.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

Example 1:

referring to fig. 1 and 2, the water mold is in front-back mirror symmetry, and comprises a water mold partition plate 11, two membrane layers 12, two pressing parts 13 and two water mold permeable layers 14 from the middle part to two sides in sequence, the water mold partition plate 11 is a square plate as a whole, the front and the back end surfaces 110 are provided with water mould water containing parts 1101 which are sunken inwards, the water mould water containing parts 1101 are square and have arc transition at four corners, the end face 110 is located outside the water mold water containing part 1101 and is a water mold frame part 1102, the water mold frame is not a square frame, the four inner corners are correspondingly transited by arcs, the widths of the upper and lower transverse edges and the left and right transverse edges of the water model frame part 1102 are approximately the same, the water mold water containing part 1101 is connected with the water mold frame part 1102 by a water mold connecting part 1103, the water mold connecting portion 1103 has a square frame shape and gradually bulges outward from the inner periphery to the outer periphery.

Referring to fig. 3, 4 and 5, the diaphragm layer 12 is flatly laid on the end surface 110 of the water mold partition plate 11, and the length and width of the diaphragm layer 12 are all greater than the length and width of the end surface 110, so that when the diaphragm layer 12 is mounted and fixed on the end surface 110, four sides of the diaphragm layer are left outside the end surface 110, and the remaining sides are referred to as first portions 121, and the first portions 121 may be fixed on corresponding side edges of the water mold partition plate 11, or may not be fixed and do not affect the fixing of the diaphragm layer 12. The part of the diaphragm layer 12 corresponding to the water containing portion 1101 at the center is denoted as a second part 122, the second part 122 is separated from the water containing portion 1101 by a certain distance, the part of the diaphragm layer 12 between the second part 122 and the first part 121 is denoted as a third part 123, the third part 123 is flatly attached to the surface of the water mold frame 1102 and is in a square frame shape, the pressing part 13 is in a square frame structure, the pressing part 13 and the water mold frame 1102 clamp and fix the third part 123 of the diaphragm layer 12, and the three parts are fixed by using a plurality of detachable fasteners, the fasteners can be fastening screws or fastening screws, since the fasteners need to penetrate through the third part 123, holes are correspondingly formed in the circumference of the third part 123, and a thickening ring is arranged on the edge of the holes to strengthen the strength of the holes so as to avoid hole deformation.

The end face 110 of the pressing portion 13 facing away from the water mold partition 11 is referred to as an outer end face 131, the end face 110 of the pressing portion facing the water mold partition 11 is referred to as an inner end face 132, a gap is formed between a portion of the inner end face 132 of the pressing portion 13 from the inner periphery to the middle periphery and the surface of the water mold frame portion 1102, the gap is gradually reduced from the inner periphery to the middle periphery of the inner end face 132 of the pressing portion 13, the inner end face 132 is divided into two portions, a portion of the outer periphery to the middle periphery corresponding to the pressing diaphragm layer 12 is referred to as a pressing portion 132A, and a portion of the inner periphery to the middle periphery corresponding to the gap is referred to as a non-pressing portion 132. Since the third portion 123 of the membrane layer 12 is divided into the clamping portion 123A and the non-clamping portion 123B by the gap, the clamping portion 123A is opposite to the pressing portion 132A and clamped and fixed by the water mold frame 1102 and the pressing portion 132A, and the non-clamping portion 123B is located in the gap. In the actual mounting and fixing process of the diaphragm layer 12, the clamping portion 123A is thermally bonded to the water mold frame 1102 by the adhesive, and then the pressing portion 13 is fixedly mounted. In summary, the water mold water containing portion 1101, the water mold connecting portion 1103, the portion of the water mold frame 1102, the non-clamping portion 123B of the third portion 123, and the second portion 122 form a closed space, which is the filtration chamber 11-r. The filter pressing chamber 11-R is filled with filter pressing water, the membrane layer 12 is pressed by the filter pressing water to gradually expand the filter pressing chamber 11-R, the non-clamping portion 123B is separated from the surface of the water form frame part 1102 and tightly attached to the non-clamping portion 132B of the inner end surface 132 of the pressing part 13, and is inclined, and the second portion 122 is not constrained to continue expanding outwards, so that the non-clamping portion 123B and the second portion 122 form a break angle R at the inner periphery of the pressing part 13, the break angle R is an obtuse angle, and the angle of the break angle R is slightly smaller than that of a gap between the non-clamping portion 13 and the water form frame part 1102 or the gap size is not changed.

In addition, the surface of the water mold frame part 1102 and the pressing part 132A of the inner end surface 132 of the pressing part 13 are provided with a pair of convex structures 11a and concave structures 13b which are in snap fit, so as to increase the actual area of the clamping part 123A of the diaphragm layer 12, although the pair of convex structures 11a and concave structures 13b is not limited, and is set reasonably according to actual requirements. Obviously, the positions of the convex structure and the concave structure can be interchanged, but considering that the thickness of the water mold partition plate 11 at the position influences the structural strength, the arrangement scheme provided by the embodiment is preferred.

Referring to fig. 6, the water-permeable membrane 14 includes a plurality of layers of screens 141 and a frame 142, the screens 141 are fixedly mounted on the frame 142 side by side, the screens 141 are woven by metal wires, and normally, the screens 141 are provided with three to five layers. The water mold permeable layer 14 is a square structure and has a length and a width slightly wider than the end surface 110 of the water mold partition 11, the water mold permeable layer 14 is fixed on the outer end surface 131 of the pressing portion 13, a specific fixing manner is preferably fixed by using a fastener (such as a fastening screw, and the like), and after the fixing and the installation are completed, the four sides of the water mold permeable layer 14 are partially exposed out of the end surface 110 of the water mold partition 11. The water mold permeable layer 14 is used for circulating water, when the water mold is in a mold closing state, the water mold permeable layer 14 is clamped by the pressing part 13 and the material mold and maintains a certain thickness to form a circulation channel, mud in the material mold accommodating chamber is extruded and filter-pressed, the water part of the mud is discharged by the material mold, and the other part of the mud flows into the water mold permeable layer 14 and is discharged by the part of the water mold permeable layer 14 exposed outside the end face 110.

Referring to fig. 7 and 8, a water inlet main channel 111a is arranged in the water form partition 11, a plurality of water inlet branch channels 112a are connected to the lower portion of the water form connecting portion 1103 and the water inlet main channel 111a, the plurality of water inlet branch channels 112a are arranged in parallel, and the water inlet branch channels 112a are substantially perpendicular to the water form connecting portion 1103.

Example 2:

a water mold was the same as in example 1 except that the structure relating to the water for injection and filtration was different from that in example 1. Referring to fig. 9, in the present embodiment, a water inlet main channel 111b is provided in the water mold partition, and a plurality of water inlet branch channels 112b are connected to the water mold water containing portion 1101 and the water inlet main channel 111b, and a related structure in CN104225985A in the prior art may be specifically adopted.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a water mould, includes the water mould baffle, and its front and back two terminal surfaces have the water mould water containing portion of caving in to form the pressure filtration room with the diaphragm layer, its characterized in that, the water mould frame portion that the terminal surface lies in outside the water mould water containing portion is fixed with the portion of compressing tightly, covers the diaphragm layer of water mould frame portion at least partly by the portion of compressing tightly with the centre gripping of water mould frame portion is fixed, and the part that the diaphragm layer was held is the closed banding that has certain width.

2. The water model of claim 1, wherein two end faces of the water model partition plate are provided with water model permeable layers which are fixed on the outer end faces of the pressing parts back to the water model frame parts, and the water model permeable layers have a certain sustainable thickness and can circulate water.

3. A water model according to claim 2, characterized in that the water permeable layer comprises a plurality of layers of screens fixed side by side.

4. The water model according to claim 2, characterized in that the pressing part is a closed structure, and the outer end face of the pressing part, which faces away from the water model partition plate, is gradually raised from the inner periphery to the middle periphery.

5. The water model according to claim 4, characterized in that the inner end surface of the pressing part, the part from the inner periphery to the middle periphery thereof and the surface of the water model frame part have a gap.

6. The water mold according to claim 5, wherein the gap is gradually reduced from an inner periphery to a middle periphery of the inner end surface of the pressing portion.

7. The water model of claim 1, wherein the pressing portion and the water model frame portion are fixedly connected by a plurality of fasteners.

8. The water model according to claim 1, characterized in that the surface of the water model frame part and the inner end surface of the pressing part facing the water model frame part are provided with at least one pair of convex structure/concave structure and concave structure/convex structure which are in snap fit.

9. The water model according to any one of claims 1-8, characterized in that at least one water inlet main channel is arranged in the water model partition plate, a water model connecting part is connected between the water model frame part and the water containing part of the water model, and at least one water inlet branch channel is connected between the lower part of the water model connecting part and the water inlet main channel.

10. The water model according to any one of claims 1-8, characterized in that at least one water inlet main channel is arranged in the water model partition plate, and at least one water inlet branch channel is connected between the water containing part of the water model and the water inlet main channel.

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