CN115846198A

CN115846198A - Filtering equipment

Info

Publication number: CN115846198A
Application number: CN202310173455.2A
Authority: CN
Inventors: 包建明; 罗京; 史海涛; 高飞; 吴灿怀
Original assignee: Jiangsu Juding Environmental Protection And Energy Saving Equipment Manufacturing Co ltd
Current assignee: Jiangsu Juding Environmental Protection And Energy Saving Equipment Manufacturing Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-03-28

Abstract

The invention provides a filtering device, which relates to the technical field of environmental protection filtering and comprises: the mineral aggregate filtering device comprises a filtering shell, wherein the top end surface of the filtering shell is provided with a filtering opening penetrating through the bottom end surface of the filtering shell, and a filtering screen plate is fixedly installed inside the filtering opening.

Description

Filtering equipment

Technical Field

The invention relates to the technical field of environment-friendly filtration, in particular to a filtering device.

Background

After the ores are mined, the ores with small sizes and not in accordance with specifications need to be filtered through screening and filtering so as to be used for different purposes and processing modes, but during the screening and filtering of the ores, due to impurities attached to the surfaces of the ores and dust contained in a large amount of ores, the screening and filtering of the ores generate a large amount of raised dust, the surrounding environment is polluted, the ores are not in accordance with the environmental protection requirement, further, the ores are generally screened and filtered through a filter screen plate, but if the filter screen plate falls off during the screening and filtering, the filter screen plate is generally positioned in a shell, and a worker cannot know the fact in time, so that the filter quality of the ores is influenced; after the ore is screened and filtered, a cleaning procedure is required to be added, and impurities attached to the surface of the ore are cleaned so as to ensure that the ore meets the follow-up processing standard.

Disclosure of Invention

In view of the above, the invention provides a filtering apparatus, wherein while performing specification filtering on mineral aggregates, a water pump extracts a water source stored in a storage tank of a water tank, the water source is conveyed into a main pipeline through a conveying pipeline and is atomized and sprayed out through an atomizing nozzle, and through the water mist, when performing specification filtering on the mineral aggregates, the dust generated by the mineral aggregates is restrained, so that pollution to the surrounding environment caused by a large amount of dust is avoided, environment-friendly filtering is realized, and through the contact between the water mist and the mineral aggregates, the surface of the mineral aggregates is cleaned, impurities attached to the surface of the mineral aggregates are removed, so that the quality of the mineral aggregates after specification filtering is ensured, and a cleaning process is not required to be additionally added subsequently.

The invention provides the purpose and the efficacy of a filtering device, which specifically comprises the following steps: the filter shell is of a rectangular shell structure, the top end face of the filter shell is provided with a filter opening penetrating through the bottom end face of the filter shell, and the filter opening is of a rectangular opening structure; the lower side parts of the left end surface and the right end surface of the filtering shell are fixedly provided with an extension plate A, and the extension plates A are of rectangular plate structures; a recovery shell which is not in contact with the filtering shell is arranged right below the filtering shell, the recovery shell is of a rectangular shell structure, a recovery groove is formed in the top end face of the recovery shell, and the recovery groove is of a rectangular groove structure; an extension plate B is fixedly arranged on the left end face and the right end face of the recovery shell, and the extension plate B is of a rectangular plate structure; the top end surfaces of the two extension plates B are fixedly connected with the bottom end surfaces of the two extension plates A which are opposite in position through three springs; two groups of vibration motors are fixedly arranged on the left end surface and the right end surface of the filtering shell respectively; the filter is characterized in that a filter screen plate is fixedly installed in the filter opening, a circle of guide protrusion is arranged on the edge of the top end face of the filter screen plate along the contour line of the filter screen plate, the section of the guide protrusion is of a right-angled triangle structure, and the long right-angled edge of the guide protrusion is attached to the side face of the inner end of the filter opening.

Furthermore, a main pipeline is fixedly arranged above the rear side face of the inner end of the filtering opening through two pipeline fixing rings, and a row of atomizing nozzles are arranged below the front side of the outer peripheral face of the main pipeline at forty-five degrees; the water tank shell is arranged on the rear end face of the recovery shell, and a water tank storage tank is arranged on the top end face of the water tank shell; the side end face of the water tank shell is fixedly provided with a water pump, the water pumping end of the water pump is communicated with the storage tank of the water tank, and the water delivery end of the water pump is communicated with the main pipeline through a delivery pipeline.

Furthermore, the front end surface and the top end surface of the filtering shell are jointly provided with a notch groove which runs through the filtering opening, the notch groove is of a rectangular groove structure, and the bottom end surface of the notch groove is higher than the top end of the guiding bulge; the side surfaces of the inner ends of the notches are jointly provided with a slot, an inserting plate is inserted in the slot, and the top end surface of the inserting plate and the top end surface of the filtering shell are positioned on the same horizontal plane in the inserting state of the inserting plate; the front end surface of the inserting plate is bilaterally symmetrical and is fixedly provided with two concave handles.

Furthermore, the front end surface and the rear end surface of the filtering shell are jointly provided with a through display port, the through display port is of a rectangular opening structure, and the top surface of the inner end of the through display port and the bottom end surface of the filtering screen plate are positioned on the same horizontal plane; the front side face and the rear side face of the inner end of the filtering opening are fixedly provided with a pressing matching plate, the pressing matching plate is of a rectangular plate structure, and the top end face of the pressing matching plate and the bottom face of the inner end of the through display opening are in the same horizontal plane.

Furthermore, a group of transparent warning shells are fixedly arranged inside the two through display openings, the transparent warning shells are of rectangular shell structures, and one third of the transparent warning shells are located outside the filtering shell; the top end face of the transparent warning shell is lower than the top face of the inner end of the through display opening.

Furthermore, a containing cavity is formed in the transparent warning shell, a glass shell is placed inside the containing cavity, the glass shell is of a rectangular shell structure, the top end face and the bottom end face of the glass shell are respectively in contact with the top face and the bottom face of the inner end of the containing cavity, the glass shell is of an inner hollow structure, a reaction solution b is filled in the cavity of the glass shell, and the reaction solution b is composed of a liquid ester compound, a fluorescent dye solution and a red pigment.

Further, the containing cavity is filled with a reaction solution a, and the reaction solution a occupies one half of the remaining area of the containing cavity; the reaction solution a consists of liquid peroxide.

Furthermore, the front side and the rear side of the bottom end face of the filter screen plate are fixedly provided with a pressing block, the pressing block is in a rectangular block structure, and the bottom end face of the pressing block is in contact with the top end face of the transparent warning shell; the pressing block corresponds to the edge of the glass shell.

Has the advantages that: 1. according to the invention, while the mineral aggregate is subjected to specification filtration, the water pump extracts the water source stored in the storage tank of the water tank, the water source is conveyed into the main pipeline through the conveying pipeline and is atomized and sprayed out through the atomizing nozzle, and through the water mist, the dust generated during the specification filtration of the mineral aggregate is inhibited, so that the pollution to the surrounding environment caused by a large amount of dust is avoided, the environment-friendly filtration is realized, the surface of the mineral aggregate is cleaned through the contact of the water mist and the mineral aggregate, the impurities attached to the surface of the mineral aggregate are removed, the quality of the mineral aggregate after specification filtration is ensured, and a cleaning process is not required to be added subsequently.

2. In order to ensure the specification filtering quality of mineral aggregate, the invention is also provided with two groups of transparent warning shells matched with the filter screen plates in position, when the filter screen plates fall off in the filtering process, under the driving of the impact of the mineral aggregate, the pressing block and the pressing matching plate are matched to jointly press the edge part of the glass shell, so that the edge part of the glass shell is pressed, the reaction solution b in the hollow cavity of the glass shell flows out from the crushing part to be mixed and reacted with the reaction solution a in the containing cavity, and fluorescence is generated and clearly displayed through the transparent warning shells, thus being beneficial to the filtering process, and workers can judge that the current filter screen plates fall off through the fluorescence and need to stop working emergently to repair the filter screen plates.

3. The reaction solution b of the invention also comprises a red pigment, and the red pigment is arranged to mix the color of the reaction solution a to enable the color of the red pigment to be developed through the transparent warning shell, while the one-third structure of the transparent warning shell is positioned outside the filtering shell, so that when the color of the red pigment is developed through the transparent warning shell, a worker can observe the color through the transparent warning shell, thereby judging that the current filter screen plate falls off and needs to stop working urgently to repair the filter screen plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

The drawings in the following description relate to only some embodiments of the invention and are not intended to limit the invention.

In the drawings:

fig. 1 is a front end axial view structural diagram of an embodiment of the invention.

Fig. 2 is a rear end axial view structural schematic diagram of the embodiment of the invention.

FIG. 3 is a schematic side view of an embodiment of the present invention.

Fig. 4 is a schematic front view of the embodiment of the present invention.

Fig. 5 is a schematic illustration of a split structure of an embodiment of the present invention.

Fig. 6 is a schematic top axial view of a filter housing according to an embodiment of the present invention.

Fig. 7 is an axial view of the bottom of the filter housing according to the embodiment of the invention.

Fig. 8 is a schematic bottom axial view of the filter screen plate according to the embodiment of the present invention.

Fig. 9 is a schematic cross-sectional structure of an embodiment of the present invention.

Fig. 10 is a schematic diagram of a partially enlarged structure at a in fig. 9 according to an embodiment of the present invention.

List of reference numerals

1. A filter housing; 101. a filtration opening; 102. a vibration motor; 103. an extension plate A; 104. a water tank housing; 105. a main pipeline; 106. an atomizing spray head; 107. a pipeline fixing ring; 108. a delivery conduit; 109. a water pump; 1010. a water tank storage tank; 1011. notching; 1012. inserting slots; 1013. the display port is communicated; 1014. pressing the mating plate; 2. inserting plates; 201. a concave handle; 3. recovering the shell; 301. an extension plate B; 302. a spring; 303. recovering the groove; 4. a transparent warning housing; 401. a receiving cavity; 402. a reaction solution a; 403. a glass housing; 404. a reaction solution b; 5. a filter screen plate; 501. a guide projection; 502. and pressing the block.

Detailed Description

In order to make the objects, aspects and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example (b): please refer to fig. 1 to 10:

the invention provides a filtering device, which comprises a filtering shell 1, wherein the filtering shell 1 is of a rectangular shell structure, the top end surface of the filtering shell 1 is provided with a filtering opening 101 penetrating through the bottom end surface of the filtering shell, and the filtering opening 101 is of a rectangular opening structure; an extension plate A103 is fixedly arranged at the lower side parts of the left end surface and the right end surface of the filtering shell 1, and the extension plate A103 is of a rectangular plate structure; a recovery shell 3 which is not in contact with the filtering shell 1 is arranged right below the filtering shell 1, the recovery shell 3 is of a rectangular shell structure, a recovery groove 303 is formed in the top end face of the recovery shell 3, and the recovery groove 303 is of a rectangular groove structure; an extension plate B301 is fixedly arranged on the left end face and the right end face of the recovery shell 3, and the extension plate B301 is of a rectangular plate structure; the top end surfaces of the two extension plates B301 are fixedly connected with the bottom end surfaces of the two extension plates A103 opposite to each other through three springs 302; two groups of vibration motors 102 are fixedly arranged on the left end surface and the right end surface of the filtering shell 1 respectively; filter opening 101 inside fixed mounting and have a filter screen 5, filter screen 5 top end face edge is equipped with the protruding 501 of round guide along its contour line, the protruding 501 cross-section of guide is the right angled triangle structure, the protruding 501 long right-angle limit of guide is laminated with the inner side of filter opening 101 mutually, through the protruding 501 setting of this guide, can guide the mineral aggregate to arrange the mesh region of filter screen 5 in, avoid the marginal dead angle to exist, with the assurance filter effect.

Wherein, a main pipeline 105 is fixedly arranged above the rear side surface of the inner end of the filtering opening 101 through two pipeline fixing rings 107, and a row of atomizing nozzles 106 are arranged at forty-five degrees below the front side of the outer peripheral surface of the main pipeline 105; a water tank shell 104 is arranged on the rear end face of the recovery shell 3, and a water tank storage groove 1010 is formed in the top end face of the water tank shell 104; the side end face of the water tank shell 104 is fixedly provided with a water pump 109, the pumping end of the water pump 109 is communicated with a water tank storage tank 1010, the water delivery end of the water pump 109 is communicated with a main pipeline 105 through a delivery pipe 108, the water pump 109 can be started together when the vibration motor 102 is started, a water source stored in the water tank storage tank 1010 is pumped, the water source is delivered into the main pipeline 105 through the delivery pipe 108 and is atomized and sprayed out through an atomizing nozzle 106, through the water mist, the generated dust is restrained when mineral aggregate is subjected to specification filtration, the pollution to the surrounding environment caused by a large amount of dust is avoided, the environment-friendly filtration is realized, and the surface of the mineral aggregate is cleaned through the contact of the water mist and the mineral aggregate, the impurities attached to the surface of the mineral aggregate are removed, the quality of the mineral aggregate after specification filtration is ensured, and a cleaning process is not required to be added in the follow-up process.

The front end face and the top end face of the filter shell 1 are jointly provided with a notch 1011 penetrating through the filter opening 101, the notch 1011 is of a rectangular groove structure, and the bottom end face of the notch 1011 is higher than the top end of the guide projection 501; the side surfaces of the inner ends of the slots 1011 are provided with a slot 1012 together, an inserting plate 2 is inserted into the slot 1012, and the top end surface of the inserting plate 2 and the top end surface of the filtering shell 1 are positioned on the same horizontal plane in the inserting state of the inserting plate 2; two concave handles 201 are fixedly mounted on the front end face of the inserting plate 2 in a bilateral symmetry manner, when the specification filtering operation of mineral aggregate is completed and the mineral aggregate meeting the specification needs to be taken out, the inserting plate 2 can be pulled upwards through the concave handles 201 along the inserting grooves 1012, so that the inserting plate 2 is disassembled, and the positions of the notches 1011 are exposed, so that the mineral aggregate meeting the specification can be taken out by a worker.

Wherein, the front end face and the rear end face of the filtering shell 1 are jointly provided with a through display port 1013, the through display port 1013 is a rectangular opening structure, and the top surface of the inner end of the through display port 1013 and the bottom end surface of the filtering screen plate 5 are in the same horizontal plane; a pressing fit plate 1014 is fixedly mounted on the front side and the rear side of the inner end of the filtering opening 101, the pressing fit plate 1014 is of a rectangular plate structure, the top end face of the pressing fit plate 1014 and the bottom face of the inner end of the through display port 1013 are on the same horizontal plane, a group of transparent warning shells 4 are fixedly mounted in the two through display ports 1013, the transparent warning shells 4 are of a rectangular shell structure, and one third of the transparent warning shells 4 are located outside the filtering shell 1; the top end face of the transparent warning shell 4 is lower than the top face of the inner end of the through display port 1013, a containing cavity 401 is formed inside the transparent warning shell 4, a glass shell 403 is placed inside the containing cavity 401, the glass shell 403 is of a rectangular shell structure, the top end face and the bottom end face of the glass shell 403 are respectively in contact with the top face and the bottom face of the inner end of the containing cavity 401, the glass shell 403 is of an inner hollow structure, a reaction solution b404 is filled in a cavity of the glass shell 403, the reaction solution b404 is composed of a liquid ester compound, a fluorescent dye solution and a red pigment, the containing cavity 401 is filled with a reaction solution a402, and the reaction solution a402 occupies one half of the remaining area of the containing cavity 401; the reaction solution a402 is composed of liquid peroxide, when the reaction solution b404 and the reaction solution a402 are mixed and react, the reaction solution b 402 generates fluorescence, the fluorescence can be clearly displayed through the transparent warning shell 4, the filtering process is facilitated, workers can judge that the current filter screen 5 falls off through the fluorescence and need to stop working urgently to repair the filter screen, and the reaction solution b404 also contains red pigment, the red pigment is mixed with the reaction solution a402 through the arrangement of the red pigment, so that the color of the red pigment can be developed through the transparent warning shell 4, and the third structure of the transparent warning shell 4 is positioned outside the filter shell 1, so when the color of the red pigment is developed through the transparent warning shell 4, the workers can observe through the transparent warning shell 4, and judge that the current filter screen 5 falls off.

Wherein, the front side and the rear side of the bottom end face of the filter screen plate 5 are both fixedly provided with a press block 502, the press block 502 is in a rectangular block structure, and the bottom end face of the press block 502 is in contact with the top end face of the transparent warning shell 4; the pressing block 502 corresponds to the edge of the glass casing 403, so that when the filter screen 5 falls off during the filtering process, the pressing block 502 and the pressing matching plate 1014 form a matching together to press the edge of the glass casing 403 under the impact of the mineral aggregate, thereby pressing and crushing the edge of the glass casing 403.

The specific use mode and function of the embodiment are as follows:

when mineral aggregate is filtered, mineral aggregate is placed above a filter screen plate 5 of a filter opening 101, a vibration motor 102 is started, the vibration motor 102 obtains exciting force by utilizing centrifugal force generated by high-speed rotation of a shaft and an eccentric block, so that a filter shell 1 and the filter screen plate 5 are driven to vibrate together, mineral aggregate placed on the filter screen plate 5 is filtered, fine mineral aggregate which does not meet the specification and powder contained in the mineral aggregate fall into a recovery groove 303 of the recovery shell 3 through meshes of the filter screen plate 5, the mineral aggregate which meets the specification is placed on the filter screen plate 5, so that the specification filtering operation of the mineral aggregate is finished, when the mineral aggregate which meets the specification is required to be taken out, an inserting plate 2 is pulled upwards through a concave handle 201 along an inserting groove 1012, so that the inserting plate 2 is detached, and a notch groove 1011 is exposed, so that a worker can take out the mineral aggregate which meets the specification;

furthermore, when the vibration motor 102 is started, the water pump 109 is started together, the water pump 109 pumps water stored in the storage tank 1010 of the water tank, the water is conveyed into the main pipeline 105 through the conveying pipeline 108 and is atomized and sprayed out through the atomizing nozzle 106, and through the water mist, when the mineral aggregate is subjected to specification filtration, the generated dust is restrained, so that the pollution to the surrounding environment caused by a large amount of dust is avoided, the environment-friendly filtration is realized, the surface of the mineral aggregate is cleaned through the contact of the water mist and the mineral aggregate, impurities attached to the surface of the mineral aggregate are removed, the quality of the mineral aggregate after specification filtration is ensured, and a cleaning process is not required to be added subsequently;

in order to ensure the specification filtering quality of mineral materials, the invention is also provided with two groups of transparent warning shells 4 matched with the forming positions of the filter screen plates 5, when the filter screen plates 5 fall off in the filtering process, under the impact drive of the mineral materials, the pressing block 502 and the pressing matching plate 1014 are matched to jointly press the edge part of the glass shell 403, so that the edge part of the glass shell 403 is pressed and crushed, the reaction solution b404 in the hollow cavity of the glass shell 403 flows out from the crushing part to be mixed and reacted with the reaction solution a402 in the accommodating cavity 401, as the reaction solution b404 is composed of liquid ester compounds, fluorescent dye solution and red pigment, and the reaction solution a402 is composed of liquid peroxide, after the mixing and reaction, fluorescence is generated, the fluorescence is clearly displayed through the transparent warning shells 4, the filtering process is facilitated, a worker can judge that the current filter screen plates 5 fall off through the fluorescence, the worker needs to emergently stop working and repair the reaction solution a further, as the reaction solution b404 also contains red pigment, the worker can judge that the color of the red pigment appears through the arrangement of the red pigment, the transparent warning shells 4, and the worker can know that the transparent warning shells 4 fall off through the transparent warning shells, and the transparent warning shells 4, so that the worker can observe the transparent warning shells 4 when the filter screen plates 5 fall off.

The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.

Claims

1. A filtration apparatus, comprising: the filter shell (1) is of a rectangular shell structure, the top end face of the filter shell (1) is provided with a filter opening (101) penetrating through the bottom end face of the filter shell, and the filter opening (101) is of a rectangular opening structure; the lower side parts of the left end face and the right end face of the filtering shell (1) are fixedly provided with an extension plate A (103), and the extension plate A (103) is of a rectangular plate structure; a recovery shell (3) which is not in contact with the filtering shell (1) is arranged under the filtering shell (1), the recovery shell (3) is of a rectangular shell structure, a recovery groove (303) is formed in the top end face of the recovery shell (3), and the recovery groove (303) is of a rectangular groove structure; an extension plate B (301) is fixedly mounted on the left end face and the right end face of the recovery shell (3), and the extension plate B (301) is of a rectangular plate structure; the top end surfaces of the two extension plates B (301) are fixedly connected with the bottom end surfaces of the two extension plates A (103) which are opposite in position through three springs (302); two groups of vibration motors (102) are fixedly arranged on the left end face and the right end face of the filtering shell (1) respectively; the filter screen plate (5) is fixedly installed inside the filter opening (101), a circle of guide protrusion (501) is arranged at the edge of the top end face of the filter screen plate (5) along the contour line of the filter screen plate, the cross section of the guide protrusion (501) is of a right-angled triangle structure, and the long right-angled edge of the guide protrusion (501) is attached to the side face of the inner end of the filter opening (101).

2. A filter apparatus as claimed in claim 1, wherein: a main pipeline (105) is fixedly arranged above the rear side face of the inner end of the filtering opening (101) through two pipeline fixing rings (107), and a row of atomizing nozzles (106) are arranged below the front side of the outer peripheral face of the main pipeline (105) at a forty-five degree angle; a water tank shell (104) is mounted on the rear end face of the recovery shell (3), and a water tank storage groove (1010) is formed in the top end face of the water tank shell (104); a water pump (109) is fixedly arranged on the end surface of the side of the water tank shell (104), the water pumping end of the water pump (109) is communicated with the water tank storage tank (1010), and the water delivery end of the water pump (109) is communicated with the main pipeline (105) through a delivery pipeline (108).

3. A filter apparatus as claimed in claim 1, wherein: the front end surface and the top end surface of the filtering shell (1) are jointly provided with a notch (1011) penetrating through the filtering opening (101), the notch (1011) is of a rectangular groove structure, and the bottom end surface of the notch (1011) is higher than the top end of the guide protrusion (501); the side surfaces of the inner ends of the notches (1011) are jointly provided with a slot (1012), an inserting plate (2) is inserted into the slot (1012), and the top end surface of the inserting plate (2) and the top end surface of the filtering shell (1) are positioned on the same horizontal plane when the inserting plate (2) is in an inserting state; the front end surface of the inserting plate (2) is symmetrically and fixedly provided with two concave handles (201).

4. A filter apparatus as claimed in claim 1, wherein: the front end face and the rear end face of the filtering shell (1) are provided with a through display port (1013) together, the through display port (1013) is of a rectangular opening structure, and the top face of the inner end of the through display port (1013) and the bottom end face of the filtering screen plate (5) are positioned on the same horizontal plane; the front side surface and the rear side surface of the inner end of the filtering opening (101) are fixedly provided with a pressing matching plate (1014), the pressing matching plate (1014) is in a rectangular plate structure, and the top end surface of the pressing matching plate (1014) and the bottom surface of the inner end of the through display opening (1013) are in the same horizontal plane.

5. A filter device according to claim 5, wherein: a group of transparent warning shells (4) are fixedly arranged in the two through display openings (1013), each transparent warning shell (4) is of a rectangular shell structure, and one third of the transparent warning shells (4) are positioned outside the filtering shell (1); the top end surface of the transparent warning shell (4) is lower than the top surface of the inner end of the through display opening (1013).

6. A filter device according to claim 5, wherein: the transparent warning shell (4) is internally provided with a containing cavity (401), a glass shell (403) is placed in the containing cavity (401), the glass shell (403) is of a rectangular shell structure, the top end face and the bottom end face of the glass shell (403) are respectively in contact with the top face and the bottom face of the inner end of the containing cavity (401), the glass shell (403) adopts an inner hollow structure, a reaction solution b (404) is filled in the hollow cavity of the glass shell (403), and the reaction solution b (404) is composed of a liquid ester compound, a fluorescent dye solution and a red pigment.

7. A filter apparatus as claimed in claim 6, wherein: the receiving cavity (401) is filled with a reaction solution a (402), and the reaction solution a (402) occupies one half of the remaining area of the receiving cavity (401); the reaction solution a (402) is composed of a liquid peroxide.

8. A filter apparatus as claimed in claim 7, wherein: the front side and the rear side of the bottom end face of the filter screen plate (5) are fixedly provided with a pressing block (502), the pressing block (502) is of a rectangular block structure, and the bottom end face of the pressing block (502) is in contact with the top end face of the transparent warning shell (4); the pressing block (502) corresponds to the edge part of the glass shell (403).