CN220899783U - Flat plate filtering device - Google Patents

Abstract

The utility model discloses a flat plate filter device, which comprises a shell, at least three supporting legs, a feed inlet, a discharge outlet and a filter assembly, wherein the shell is provided with a plurality of supporting legs; the shell comprises a shell body, a lower shell which is arranged below the shell body and detachably connected with the shell body, and at least one group of dislocation preventing components for preventing dislocation of the shell body and the lower shell; the branch feeding port is arranged on the shell body and is communicated with the inner cavity of the shell body; the discharge hole is arranged at the lower end of the shell body and is communicated with the inner cavity of the lower shell; the filter component is used for separating solids in the filter pulp and is arranged between the shell body and the lower shell. According to the technical scheme, the shell body, the lower shell, the at least three supporting legs, the feeding hole, the discharging hole and the filtering component are adopted, so that an upper cover of the filtering device does not need to be opened, and the disassembly weight of the filtering device is reduced; the disassembly and maintenance time is saved.

Description

Flat plate filtering device

Technical Field

The utility model relates to the technical field of filtration, in particular to a flat plate filter device.

Background

The inside of the shell of the filter mainly comprises a coarse filter screen, a fine filter screen, a dirt absorbing pipe, a stainless steel brush, a sealing ring, an anti-corrosion coating, a rotating shaft and the like. The filter works in that the filter medium is used to divide the container into upper and lower cavities and the filter is simple in structure. The suspension is added into the upper cavity, and enters the lower cavity through the filter medium under the action of pressure to form filtrate, and solid particles are trapped on the surface of the filter medium to form filter residues (filter cakes).

At present, a filter pressing device is usually provided with an opening at the upper end, a filter screen is placed through the opening at the upper end, and filtered residues are removed. But the upper end opening weight of filter pressing device is heavier, dismantles the clearance and maintains inconvenient, dismantles the maintenance time length, and maintenance cost is high.

Disclosure of utility model

The utility model mainly aims to provide a flat plate filter device, which aims to reduce the disassembly weight of the filter device, save the disassembly maintenance time and reduce the maintenance cost.

In order to achieve the above object, the present utility model provides a flat filtering device for filtering slurry, the flat filtering device comprising:

The shell comprises a shell body, a lower shell which is arranged below the shell body and detachably connected with the shell body, and at least one group of dislocation preventing assemblies for preventing dislocation of the shell body and the lower shell;

the support legs are used for supporting the shell body and are fixedly connected with the peripheral wall of the shell body;

the feeding port is arranged on the shell body and is communicated with the inner cavity of the shell body;

the discharging hole is arranged at the lower end of the shell body and is communicated with the inner cavity of the lower shell;

The filter assembly is used for separating solids in the filter pulp and is arranged between the shell body and the lower shell.

Optionally, the shell further comprises a first flange fixedly connected with the lower end of the shell body and a second flange fixedly connected with the upper end of the lower shell;

The dislocation preventing assembly includes: the limiting groove is formed in the outer edge of the first flange, and the limiting block is fixedly arranged on the upper end face of the second flange and matched with the limiting groove.

Optionally, the outer side of the limit groove is gradually narrowed towards the inner side; the stopper includes: the limiting surface is used for limiting the connection between the shell body and the lower shell;

the guide inclined plane is obliquely downwards arranged from the outer edge of the second flange to the center.

Optionally, the filtering component comprises a compression ring, a pore plate arranged below the compression ring, filter cloth arranged between the compression ring and the pore plate, a first sealing ring arranged between the compression ring and the shell body, and a second sealing ring arranged between the compression ring and the filter cloth; the upper end of the pressing ring is provided with a first annular groove for accommodating the first sealing ring, and the upper end of the pore plate is provided with a second annular groove for accommodating the second sealing ring;

The filter assembly further comprises a third sealing ring arranged between the pore plate and the lower shell; the upper end of the lower shell is provided with a third ring groove for accommodating a third sealing ring;

The novel shell comprises a shell body and is characterized by further comprising a fourth sealing ring, wherein the fourth sealing ring is arranged between the shell body and the lower shell.

Optionally, at least three movable legs, the movable legs comprising: the first cylinder, the second cylinder and the first cylinder form a telescopic structure, and the driving assembly drives the first cylinder and the second cylinder to stretch; the upper end of the first cylinder is fixedly connected with the lower shell, and the lower end of the second cylinder is fixedly provided with a moving part.

Optionally, the second cylinder is disposed on an outer peripheral wall of the first cylinder.

Optionally, a vertical bar hole is formed in the first cylinder, and the driving assembly includes: the rack is vertically arranged on the inner peripheral wall of the first cylinder body, the driving motor is fixed on the outer peripheral wall of the second cylinder body, and the output shaft of the driving motor penetrates through the strip-shaped hole, and the gear is fixedly arranged on the output shaft of the driving motor and meshed with the rack;

The moving part is a universal wheel.

Optionally, the method further comprises: the shell body comprises a jacket arranged on the outer side of the shell body, and the jacket liquid inlet and the jacket liquid outlet are respectively communicated with the jacket;

The position of the jacket liquid outlet is higher than the position of the jacket liquid inlet.

The shell also comprises an upper shell, and the upper shell is detachably connected with the shell body through a detachable assembly; the upper shell is provided with a sight glass port, a lamp hole, a nitrogen port and a pressure gauge port;

The upper end of the upper shell is fixedly provided with a screw rod which passes through the upper end of the support piece and is in threaded connection with the upper end of the support piece; the upper end of the screw rod is fixedly provided with a rotating disc.

Optionally, the housing further comprises at least one set of misalignment prevention assemblies that prevent misalignment of the housing body and the lower housing.

Optionally, the housing further comprises at least two sets of detachable components detachably connecting the housing body and the lower housing;

The detachable component comprises a bolt and a flying nut which are rotatably arranged on the second flange; the bolt rotating shaft is fixed on the second flange and is in threaded connection with the flying ring nut after penetrating through the first flange.

Optionally, the leg comprises: the vertical leg, two ends are respectively connected with the vertical leg and the shell body, and the reinforcing rib is used for reinforcing the connection strength between the vertical leg and the connecting leg;

The angle between the vertical leg and the connecting leg is an obtuse angle;

At least three landing legs are uniformly distributed on the peripheral wall of the shell body.

According to the technical scheme, the shell body, the lower shell, the at least three supporting legs, the feeding hole, the discharging hole and the filtering component are adopted, so that an upper cover of the filtering device does not need to be opened, and the disassembly weight of the filtering device is reduced; the upper cover of the filtering device is not required to be detached and placed, the lower shell is directly moved, the detachment and maintenance time is saved, and the maintenance cost is reduced; in order to prevent down casing and shell body dislocation under the casing with the shell body installation, improve the leakproofness between casing and the shell body down.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic top view of a quick release filter device according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 in the direction A-A;

FIG. 3 is an enlarged view of a portion of FIG. 2 at C;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 2 in the direction D-D;

FIG. 5 is a schematic view of the cross-sectional structure in the direction B-B in FIG. 1;

FIG. 6 is an enlarged view of a portion of FIG. 5 at E;

FIG. 7 is a schematic view of the structure of the movable leg of the quick-release filter device of the present utility model;

fig. 8 is a partial enlarged view of F in fig. 7.

The main reference numerals are as follows: the shell body 11, the jacket 111, the jacket liquid inlet 112, the jacket liquid outlet 113, the support 116, the lower shell 12, the upper shell 13, the screw 131, the rotating disc 133, the sight glass 134, the lamp hole 135, the nitrogen gas port 136, the pressure gauge port 137, the detachable component 14, the flying nut 143, the bolt 144, the first flange 15, the limiting groove 151, the second flange 16, the limiting block 161, the guiding inclined surface 1611, the limiting surface 1612, the supporting leg 2, the vertical leg 21, the connecting leg 22, the reinforcing rib 23, the feed inlet 3, the discharge port 4, the filter component 5, the pressure ring 51, the orifice plate 52, the first sealing ring 54, the second sealing ring 55, the third sealing ring 58, the fourth sealing ring 56, the movable leg 6, the first cylinder 61, the bar hole 611, the second cylinder 62, the driving component 63, the rack 631, the driving motor 632, the gear 633 and the universal wheel 68.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to merely for explaining a relative positional relationship, a movement condition, and the like between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a flat plate filter device.

In the embodiment of the utility model, as shown in fig. 1 to 8, the flat filtering device is used for filtering the filtered slurry and comprises a shell, at least three supporting legs 2, a feeding hole 3, a discharging hole 4, a filtering component 5 and at least three movable legs 6; the shell comprises a shell body 11 and a lower shell 12 which is arranged below the shell body 11 and is detachably connected with the shell body 11; the supporting leg 2 is used for supporting the shell body 11 and is fixedly connected with the peripheral wall of the shell body 11; at least three supporting legs 2 are uniformly distributed on the peripheral wall of the shell body 11; the feed inlet is arranged on the shell body 11 and communicated with the inner cavity of the shell body 11, and is used for conveying filtered slurry into the shell body 11; the discharge port 4 is arranged at the lower end of the lower shell 12 and is communicated with the inner cavity of the lower shell 12; the filter assembly 5 is used for separating solids in the filter slurry, and the filter assembly 5 is arranged between the shell body 11 and the lower shell 12 and is respectively connected with the shell body 11 and the lower shell 12 in a sealing way; the movable leg 6 includes: the first cylinder 61, the second cylinder 62 forming a telescopic structure with the first cylinder 61, and a driving assembly 63 for driving the first cylinder 61 and the second cylinder 62 to stretch; the upper end of the first cylinder 61 is fixedly connected with the lower housing 12, and the lower end of the second cylinder 62 is fixedly provided with a moving member.

According to the technical scheme, the upper cover of the filtering device is not required to be opened by adopting the shell body 11, the lower shell 12, at least three supporting legs 2, the feeding hole 3, the discharging hole 4, the filtering component 5 and at least three movable legs 6, so that the disassembly weight of the filtering device is reduced; the upper cover of the filtering device is not required to be detached and placed, the lower shell is directly moved, the detachment and maintenance time is saved, and the maintenance cost is reduced; to prevent the misalignment of the lower case 12 and the case body 11 when the lower case 12 is mounted with the case body 11, and to improve the sealability between the lower case 12 and the case body 11.

Specifically, in order to facilitate the lifting of the movable leg 6, the second cylinder 62 is provided on the outer peripheral wall of the first cylinder 61.

Specifically, in order to facilitate lifting of the movable leg 6, to realize automatic lifting of the movable leg 6, a vertical bar-shaped hole 611 is formed in the first cylinder 61, and the driving assembly 63 includes: the rack 631 vertically arranged on the inner peripheral wall of the first cylinder 61, the driving motor 632 fixed on the outer peripheral wall of the second cylinder 62 and the output shaft passing through the bar-shaped hole 611, and the gear 633 fixedly arranged on the output shaft of the driving motor 632 and meshed with the rack 631; to facilitate movement of the lower housing 12, the displacement member is a universal wheel 68.

Specifically, the filtering function is realized. The filter assembly 5 comprises a press ring 51, a pore plate 52 arranged below the press ring 51, filter cloth arranged between the press ring 51 and the pore plate 52, a first sealing ring 54 arranged between the press ring 51 and the shell body 11, and a second sealing ring 55 arranged between the press ring 51 and the filter cloth; the upper end of the compression ring 51 is provided with a first annular groove for accommodating the first sealing ring 54, and the upper end of the pore plate 52 is provided with a second annular groove for accommodating the second sealing ring 55.

Specifically, to improve the tightness of the filter assembly 5 and the filtering capacity of the filtering device, the filter assembly 5 further includes a third seal ring 58 disposed between the orifice plate 52 and the lower housing 12; the upper end of the lower shell 12 is provided with a third ring groove for accommodating the third sealing ring 58.

Specifically, in order to improve the tightness of the filtering device, the flat filtering device further includes a fourth sealing ring 56, and further includes a fourth sealing ring 56, where the fourth sealing ring 56 is disposed between the housing body 11 and the lower housing 12. The fourth seal 56 is disposed between the first flange and the second flange. The upper end of the second flange is provided with a fourth ring groove for accommodating the fourth sealing ring 56.

Specifically, in order to be convenient for carry out temperature control to filter equipment, flat filter equipment still includes: the shell body 11 comprises a jacket 111 arranged on the outer side of the shell body 11, a jacket 111, and the jacket liquid inlet 112 and the jacket liquid outlet 113 are respectively communicated with the jacket 111. The legs 2 are fixed to the outer peripheral wall of the collet.

Specifically, in order to improve the temperature control effect of the filtering device, the position of the jacket liquid outlet 113 is higher than the position of the jacket liquid inlet 112.

Specifically, in order to facilitate maintenance of the housing and observe the conditions in the housing, the housing further includes an upper housing 13, and the upper housing 13 is detachably connected with the housing body 11 through a detachable assembly 14; the upper shell 13 is provided with a sight glass port 134, a lamp hole 135, a nitrogen port 136 and a pressure gauge port 137;

A supporting piece 116 is fixedly arranged on the peripheral wall of the jacket, the upper end of the supporting piece 116 is arranged above the upper shell 13, a screw 131 is fixedly arranged at the upper end of the upper shell 13, and the screw 131 penetrates through the upper end of the supporting piece 116 and is in threaded connection with the upper end of the supporting piece 116; a rotating disc 133 is fixedly provided at the upper end of the screw 131.

Specifically, in order to prevent the misalignment of the lower case 12 and the case body 11 when the lower case 12 is mounted with the case body 11, the sealability between the lower case 12 and the case body 11 is improved, and the case further includes at least one set of misalignment preventing members that prevent the misalignment of the case body 11 and the lower case 12.

Specifically, the lower casing 12 is prevented from being dislocated with the lower casing 12 and the casing body 11 when being mounted with the casing body 11, the tightness between the lower casing 12 and the casing body 11 is improved, and the casing further comprises a first flange 15 fixedly connected with the lower end of the casing body 11 and a second flange 16 fixedly connected with the upper end of the lower casing 12; the dislocation preventing assembly includes: the limiting groove 151 is formed in the outer edge of the first flange 15, and the limiting block 161 is fixedly arranged on the upper end face of the second flange 16 and matched with the limiting groove 151.

Specifically, in order to facilitate the installation of the lower case 12, the outer side of the limiting groove 151 is gradually narrowed toward the inner side; the stopper 161 includes: a guide inclined surface 1611 for guiding the second flange 16 by being engaged with the limit groove 151, and a limit surface 1612 for limiting the connection of the case body 11 and the lower case 12;

Specifically, to facilitate the installation of the lower housing 12, the guide inclined surface 1611 is disposed obliquely downward from the outer edge of the second flange 16 toward the center.

Specifically, the housing further includes at least two sets of removable components 14 that removably connect the housing body 11 and the lower housing 12.

Specifically, in order to achieve the detachable function between the case body 11 and the lower case 12, the detachable assembly 14 includes a bolt 144 and a flying nut 143 rotatably provided on the second flange 16; the bolt 144 is rotatably fixed to the second flange 16 and is screwed with the eye nut 143 after passing through the first flange 15.

Specifically, in order to improve the supporting effect and ability of the leg, the leg 2 includes: the vertical leg 21 and the connection leg 22 of the vertical leg 21 and the case body 11 are connected to each other at both ends thereof, and the reinforcing rib 23 for reinforcing the connection strength between the vertical leg 21 and the connection leg 22. The angle between the upright leg 21 and the connecting leg 22 is an obtuse angle.

Specifically, at least three legs 2 are uniformly distributed on the outer peripheral wall of the housing body 11.

The working principle of the utility model is as follows: when the slurry is required to be filtered, the third seal ring 58, the orifice plate 52, the filter cloth, the second seal ring 55, the compression ring 51 and the first seal ring 54 are placed above the lower housing 12 in sequence from bottom to top, and the fourth seal ring 56 is also placed on the second flange 16. Then the lower shell 12 is pushed to the lower part of the shell body 11 through the universal wheel 68, the limiting block 161 is positioned below the limiting groove 151, the driving motor 632 arranged on the second cylinder 62 drives the gear 633 to rotate and the rack 631 to move upwards, and then the first cylinder 61 is driven to move upwards; in the process of ascending the first cylinder 61, the guide inclined surface 1611 of the limiting block 161 is contacted with the limiting groove 151, and then the limiting groove 151 is limited by the guide inclined surface 1611, so that the limiting groove 151 is contacted with the limiting surface 1612, the limiting groove 151 is located among the limiting surfaces 1612, the limiting of the second flange 15 is realized, and the limiting of the lower shell 12 is further realized. Then, the upper ends of the bolts 144 sequentially penetrate through the first flange 15 and the second flange 16 and then are in threaded connection with the ring nuts 143, so that the lower shell 12 is in sealed connection with the shell body 11; as well as the filter assembly, between the lower housing 12 and the housing body 11. And the upper housing 13 is hermetically fixed to the housing body 11 by the rotating disc 133, the screw 131, the supporting member 116, and the detachable member 14. Then, the filter pulp is introduced into the shell body 11 through the feed inlet 3, liquid in the filter pulp is converged into filtrate through the filter cloth and the pore plate 52 in sequence under the action of the gravity of the filter pulp, and the filtrate is discharged through the discharge outlet; the solids in the slurry are concentrated on the filter cloth. Nitrogen may be introduced into the housing through nitrogen port 136 to increase the pressure within the housing and prevent air from reacting with the slurry. The situation in the housing can be observed through the sight glass port 134, and a pressure gauge can be installed through the pressure gauge port 137 to display the pressure in the housing.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (9)

1. A flat panel filter device for filtering a slurry, the flat panel filter device comprising:

the shell comprises a shell body (11), a lower shell (12) arranged below the shell body (11) and detachably connected with the shell body (11), and at least one group of dislocation prevention components for preventing dislocation of the shell body (11) and the lower shell (12);

The support legs (2) are used for supporting the shell body (11) and are fixedly connected with the peripheral wall of the shell body (11);

The feeding port (3) is arranged on the shell body (11) and is communicated with the inner cavity of the shell body (11);

the discharging hole (4) is arranged at the lower end of the shell body (11) and is communicated with the inner cavity of the lower shell (12);

A filter assembly (5), wherein the filter assembly (5) is used for separating solids in filter pulp, and the filter assembly (5) is arranged between the shell body (11) and the lower shell (12);

The shell also comprises a first flange (15) fixedly connected with the lower end of the shell body (11) and a second flange (16) fixedly connected with the upper end of the lower shell (12);

The dislocation prevention assembly includes: the limiting groove (151) is formed in the outer edge of the first flange (15), and the limiting block (161) is fixedly arranged on the upper end face of the second flange (16) and matched with the limiting groove (151).

2. The flat panel filter device according to claim 1, wherein the limiting groove (151) is tapered from the outside to the inside; the stopper (161) includes: a guiding inclined plane (1611) for guiding the second flange (16) through matching with the limiting groove (151) and a limiting surface (1612) for limiting the connection between the shell body (11) and the lower shell (12);

The guide inclined surface (1611) is arranged obliquely downwards from the outer edge of the second flange (16) to the center.

3. The flat panel filter device according to claim 1 or 2, wherein the filter assembly (5) comprises a pressure ring (51), an orifice plate (52) arranged below the pressure ring (51), a filter cloth arranged between the pressure ring (51) and the orifice plate (52), a first sealing ring (54) arranged between the pressure ring (51) and the housing body (11), and a second sealing ring (55) arranged between the pressure ring (51) and the filter cloth; the upper end of the pressing ring (51) is provided with a first annular groove for accommodating a first sealing ring (54), and the upper end of the pore plate (52) is provided with a second annular groove for accommodating a second sealing ring (55);

the filter assembly (5) further comprises a third sealing ring (58) arranged between the pore plate (52) and the lower shell (12); the upper end of the lower shell (12) is provided with a third annular groove for accommodating a third sealing ring (58);

The novel sealing device further comprises a fourth sealing ring (56), and the fourth sealing ring (56) is arranged between the shell body (11) and the lower shell (12).

4. The flat panel filter device according to claim 3, further comprising: at least three movable legs (6), the movable legs (6) comprising: a first cylinder (61), a second cylinder (62) forming a telescopic structure with the first cylinder (61), and a driving assembly (63) driving the first cylinder (61) and the second cylinder (62) to stretch; the upper end of the first cylinder (61) is fixedly connected with the lower shell (12), and the lower end of the second cylinder (62) is fixedly provided with a moving part.

5. The flat panel filter device according to claim 4, wherein the second cylinder (62) is provided to an outer peripheral wall of the first cylinder (61).

6. The flat panel filter device according to claim 5, wherein the first cylinder (61) is provided with a vertical bar-shaped hole (611), and the driving assembly (63) comprises: the device comprises racks (631) vertically arranged on the inner peripheral wall of the first cylinder (61), a driving motor (632) fixed on the outer peripheral wall of the second cylinder (62) and having an output shaft penetrating through the strip-shaped hole (611), and gears (633) fixedly arranged on the output shaft of the driving motor (632) and meshed with the racks (631);

the moving member is a universal wheel (68).

7. The flat panel filter device according to claim 1 or 2, further comprising: the shell comprises a shell body (11), wherein the shell body comprises a jacket (111) arranged on the outer side of the shell body (11), the jacket (111) is provided with a jacket liquid inlet (112) and a jacket liquid outlet (113), and the jacket liquid inlet (112) and the jacket liquid outlet (113) are respectively communicated with the jacket (111);

the position of the jacket liquid outlet (113) is higher than the position of the jacket liquid inlet (112);

The shell further comprises an upper shell (13), and the upper shell (13) is detachably connected with the shell body (11) through a detachable assembly (14); the upper shell (13) is provided with a sight glass port (134), a lamp hole (135), a nitrogen port (136) and a pressure gauge port (137);

A supporting piece (116) is fixedly arranged on the peripheral wall of the jacket, the upper end of the supporting piece (116) is arranged above the upper shell (13), a screw rod (131) is fixedly arranged at the upper end of the upper shell (13), and the screw rod (131) penetrates through the upper end of the supporting piece (116) and is in threaded connection with the upper end of the supporting piece (116); the upper end of the screw rod (131) is fixedly provided with a rotating disc (133).

8. The flat panel filter device according to claim 1, 2, 4, 5 or 6, wherein the housing further comprises at least two sets of detachable components (14) detachably connecting the housing body (11) and the lower housing (12);

The detachable assembly (14) comprises a bolt (144) and a suspension ring nut (143) which are rotatably arranged on the second flange (16); the bolt (144) is fixed on the second flange (16) in a rotating shaft mode and is in threaded connection with the lifting ring nut (143) after penetrating through the first flange (15).

9. The flat panel filter device according to claim 1 or 2, wherein the leg (2) comprises: the vertical leg (21), the two ends of the reinforcing rib (23) are respectively connected with the vertical leg (21) and the shell body (11), and the reinforcing rib (22) is used for reinforcing the connection strength between the vertical leg (21) and the connecting leg (22);

The angle between the vertical leg (21) and the connecting leg (22) is an obtuse angle;

at least three supporting legs (2) are uniformly distributed on the peripheral wall of the shell body (11).