A fire and dust prevention device for a grinding trolley

Abstract

The present invention discloses a fireproof and dustproof device for a grinding trolley, comprising: a top cover plate, an end baffle plate, a dust collecting channel, a side baffle plate and a fireproof curtain. The dust collecting channel is arranged at the upper part of the top cover plate, and the dust generated during the grinding process enters the dust collecting device through the dust collecting channel. The side baffle plates are arranged at the lower parts of both sides of the top cover plate perpendicular to the working direction, and a heat dissipation device is provided on the side baffle plates. The end baffle plates are arranged at the lower parts of both sides of the top cover plate along the working direction, and a detachable connection structure is adopted between the top cover plate and the side baffle plates, and between the end baffle plates and the side baffle plates. The lower parts of the end baffle plates and the side baffle plates are connected with fireproof curtains. The present invention can solve the technical problems that the existing fireproof and dustproof device for a grinding trolley adopts a rigid connection structure, cannot be quickly disassembled and assembled, is not convenient for space utilization, and is not convenient for maintenance operations.

Description

Technical Field

[0001] The invention relates to the technical field of rail engineering machinery, in particular to a fire and dust prevention device of a stepless air-adjusting grinding trolley applied to a rail grinding trolley. Background Art

[0002] During train operation, rails are exposed to harsh working conditions for a long time, which can lead to defects such as fat edges, corrugated wear, and scale on the rail surface, seriously impacting train safety. Rail grinding vehicles can improve rail smoothness by removing surface irregularities, slowing the development of surface defects and extending rail service life. The grinding vehicle is the actuator for the grinding operation and a key component of the rail grinding vehicle. During rail grinding operations, sparks and hot iron chips generated during rail grinding can damage surrounding rail infrastructure or ignite trackside materials, causing fires. Furthermore, dust generated during grinding can cause injuries to workers, environmental pollution, and equipment damage. Fire and dust prevention devices fully cover the grinding device, creating a more enclosed environment. This facilitates dust collection through the dust collection channel, reduces the adverse effects of sparks and hot iron chips generated during rail grinding operations on the equipment and surrounding environment, and effectively improves the working environment. Therefore, as one of the core components of the grinding trolley, the fire and dust prevention device plays an important role in eliminating safety hazards in the operation of the rail grinding trolley.

[0003] In the prior art, the following technical solutions are mainly related to the present invention:

[0004] Prior Art 1 is a Chinese invention application filed on April 22, 2014, and published on July 9, 2014, with publication number CN103911925A. This application discloses a rail grinding vehicle frame, comprising a longitudinal beam with end beams disposed transversely at each end of the longitudinal beam and a cross beam disposed transversely in the middle of the longitudinal beam. End plates are fixed to the outer sides of the two end beams, and side plates are fixed to the ends of the end beam and cross beam. Cover plates are fixed to the upper portions of the longitudinal beam, end beam, and cross beam, and fire curtains are connected to the lower portions of the end plates and side plates. The frame is equipped with retaining grooves, dust covers, locking devices, and other features. This application is applicable to various rail grinding vehicles and is used to correct various rail defects caused by vehicle travel on rails, such as wavy rail wear, wheel-rail abrasions, correct inner and outer rail tilt and deformation, and repair the wheel-rail contact surface, thereby performing preventive maintenance on track rails. This rail grinding vehicle frame features a simple structure, high cost-effectiveness, and low maintenance costs.

[0005] However, the fire and dust prevention device for the polishing trolley in the prior art still has the following technical defects:

[0006] (1) The side and end faces of the grinding trolley in the prior art all adopt a door-type rigid connection structure, which limits the use of the side space. When the internal structure of the grinding trolley needs to be maintained, the side baffle cannot be directly removed, which blocks the side space and makes it inconvenient for maintenance personnel to perform maintenance operations;

[0007] (2) After the grinding trolley structure of the prior art is closed, the air convection is poor, and the heat generated by the grinding wheel grinding the rails accumulates, which easily causes the temperature inside the grinding trolley to be too high, causing damage to the grinding unit and other components, seriously affecting the safety and reliability of the grinding trolley operation. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide a fire and dust prevention device for a grinding trolley to solve the technical problems that the existing fire and dust prevention device for a grinding trolley adopts a rigid connection structure, cannot be quickly disassembled and assembled, is not convenient for space utilization, and is not convenient for maintenance operations.

[0009] In order to achieve the above-mentioned purpose of the invention, the present invention specifically provides a technical implementation scheme of a fireproof and dustproof device for a grinding trolley, and the fireproof and dustproof device for the grinding trolley includes: a top cover plate, an end baffle, a dust collecting channel, a side baffle and a fire curtain. The dust collecting channel is arranged on the upper part of the top cover plate, and the dust generated during the grinding process enters the dust collecting device through the dust collecting channel. The side baffles are arranged on the lower part of the left and right sides of the top cover plate along the operating direction of the grinding trolley, and a heat dissipation device is provided on the side baffles. The end baffles are arranged on the lower part of the front and rear ends of the top cover plate along the operating direction of the grinding trolley, and a detachable connection structure is adopted between the top cover plate and the side baffles, as well as between the end baffles and the side baffles. The lower parts of the end baffles and the side baffles are connected to fire curtains.

[0010] Furthermore, the heat dissipation device includes a first heat dissipation hole formed on the side baffle and a sliding cover mounted on the side baffle. The side baffle is provided with a second heat dissipation hole. By adjusting the offset angle between the first heat dissipation hole and the second heat dissipation hole, the opening size of the heat dissipation device is adjusted, thereby changing the air convection rate, thereby achieving stepless air flow adjustment of the heat dissipation device.

[0011] Furthermore, one end of the sliding cover plate protrudes outward along the direction of sliding and disassembly to form a first fixing portion, and the other end protrudes outward to form a second fixing portion. Both the first and second fixing portions have guide grooves along the direction of sliding and disassembly, through which bolts pass and are secured to the side baffles. When the bolts are loosened and the sliding cover plate is pushed or pulled along the direction of assembly and disassembly, the bolts slide within the guide grooves to adjust the size of the opening of the heat dissipation device.

[0012] Furthermore, the side baffles are provided with guide mounting parts in pairs for fixing the sliding cover plate, and the two sides of the sliding cover plate fixed to the guide mounting parts protrude toward the outer surface to form limiting parts, and the guide mounting parts and the limiting parts form an interlocking structure.

[0013] Furthermore, an end portion of the first fixing portion or the second fixing portion protrudes toward the outer surface to form a first handle, and a second handle is provided on the side baffle.

[0014] Furthermore, the upper side edges of the side baffles are curled toward the inner lower portion to form a U-shaped first locking portion, and the side edges fixed to the top cover and the side baffles are curled toward the outer upper portion to form a U-shaped second locking portion, and a mutually locked detachable connection structure is formed between the first locking portion and the second locking portion.

[0015] Furthermore, the top cover plate and the end baffles are both formed by a plurality of unit plates fixedly spliced ​​together.

[0016] Furthermore, the side panels and end panels are connected and fixed by latches. Mounting seats for the latches are provided on the side panels, and locking seats are provided on the end panels at positions corresponding to the latches. An elastic member is sheathed around the outer surface of the latch, and the elastic member is also positioned within the mounting seat to prevent movement of the latch during locking.

[0017] Preferably, the top cover plate, end baffles and side baffles are all made of aluminum.

[0018] Preferably, the fire curtain is made of high-temperature resistant graphite carbon material fireproof cloth, and is installed below the end baffles and side baffles through strip-shaped pressing plates.

[0019] By implementing the technical solution of the fire and dust prevention device for the polishing trolley provided by the present invention, the following beneficial effects are achieved:

[0020] (1) The fire and dust prevention device of the grinding trolley of the present invention adopts a detachable connection structure between the top cover plate and the side baffles, as well as between the end baffles and the side baffles. Compared with the rigidly connected door panel structure, when the internal structure of the grinding trolley needs to be maintained, the side baffles can be conveniently removed directly, avoiding the baffles from blocking the side space, leaving a larger maintenance operation space for maintenance personnel;

[0021] (2) The fire and dust prevention device of the grinding trolley of the present invention adopts a closed structure combining a hook and a latch, which improves the closedness of the rail grinding trolley structure and can effectively reduce the overflow of dust during the grinding process. As a result, the grinding dust can be more effectively collected in the dust collecting device, thereby reducing the harm of dust to workers, pollution to the environment, and damage to equipment;

[0022] (3) The fireproof and dustproof device of the grinding trolley of the present invention improves the internal heat dissipation of the grinding trolley during operation by adding heat dissipation grooves on the side baffles. The interior of the grinding trolley is cooled by natural wind during operation, effectively avoiding damage to the grinding unit and other parts caused by excessive temperature inside the grinding trolley;

[0023] (4) The fireproof and dustproof device of the polishing trolley of the present invention adopts a stepless air adjustment structure composed of a side baffle heat dissipation device, a handle and a movable limit groove (i.e., a guide mounting portion). The size of the heat dissipation groove opening is changed by the handle to change the convection heat dissipation efficiency of the polishing trolley. The size of the heat dissipation groove opening is adjusted in real time according to actual working conditions and needs, which can reduce dust overflow while ensuring heat dissipation performance without affecting the dust collection effect of the polishing trolley.

[0024] (5) The fire and dust prevention device of the grinding trolley of the present invention, the plate structure and fire curtains at various parts can effectively prevent sparks and high-temperature iron filings from flying outward and injuring other facilities beside the rails or igniting materials around the rails to cause fires. The main structure is made of aluminum material, which effectively realizes the lightweight design of the fire and dust prevention system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be derived from these drawings without inventive effort.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of a specific embodiment of the fire and dust prevention device for a grinding trolley of the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of a specific embodiment of the fire and dust prevention device for a grinding trolley of the present invention, with the heat dissipation device removed;

[0028] Figure 3 This is a schematic front view of the structure of a specific embodiment of the fire and dust prevention device for a grinding trolley of the present invention;

[0029] Figure 4 This is a schematic side view of the structure of a specific embodiment of the fire and dust prevention device for a grinding trolley of the present invention;

[0030] Figure 5 This is a schematic top view of the structure of a specific embodiment of the fire and dust prevention device for a grinding trolley of the present invention;

[0031] Figure 6This is a structural schematic diagram of a heat dissipation device in a specific embodiment of the fire and dust prevention device for a grinding trolley of the present invention;

[0032] Figure 7 This invention Figure 1 Schematic diagram of the local structure of part A;

[0033] Figure 8 This invention Figure 3 Schematic diagram of the local structure of part B;

[0034] Figure 9 This invention Figure 4 Schematic diagram of the local structure of part C;

[0035] In the figure: 1-top cover, 2-end baffle, 3-heat dissipation device, 4-dust collection channel, 5-side baffle, 6-latch, 7-pressure plate, 8-fire curtain, 9-sliding cover, 10-first handle, 11-second handle, 12-first heat dissipation hole, 13-first fixing part, 14-second fixing part, 15-guide groove, 16-bolt, 17-first locking part, 18-second locking part, 19-guide mounting part, 20-limiting part, 21-mounting seat, 22-locking seat, 23-elastic member, 24-second heat dissipation hole, 100-fire and dust prevention device. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0040] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0041] As attached Figure 1 To the attached Figure 9 As shown, a specific embodiment of the fire and dust prevention device for the grinding trolley of the present invention is given, and the present invention is further described below in conjunction with the drawings and specific embodiments.

[0042] As attached Figure 1 、 2 As shown in Figure 5, an embodiment of a fireproof and dustproof device for a grinding trolley is shown. The fireproof and dustproof device 100 is installed on the outside of the grinding trolley and specifically includes: a top cover plate 1, an end baffle 2, a dust collection channel 4, a side baffle 5 and a fire curtain 8. The dust collection channel 4 is arranged on the upper part of the top cover plate 1, and the dust generated during the grinding process enters the dust collection device through the dust collection channel 4. The side baffle 5 is arranged on the top cover plate 1 along the working direction of the grinding trolley 100 (as shown in the attached figure). Figure 1 The side baffles 5 are provided with heat dissipation devices 3 at the lower parts of the left and right sides (in the direction indicated by L, and in the direction indicated by W which is the vertical direction of the operating direction of the grinding trolley 100). The end baffles 2 are arranged at the lower parts of the front and rear ends of the top cover 1 along the operating direction of the grinding trolley 100, and a detachable connection structure is adopted between the top cover 1 and the side baffles 5, as well as between the end baffles 2 and the side baffles 5. The lower parts of the end baffles 2 and the side baffles 5 are connected to fire curtains 8. The specific embodiment of the present invention designs the fire and dust prevention device 100 into a relatively closed structure through the top cover 1, the end baffles 2, the side baffles 5 and the fire curtains 8, which can effectively ensure the effective collection of dust during the grinding operation, thereby reducing pollution to the environment and damage to the equipment, and improving the working environment of the operators.

[0043] As attached Figure 1 As shown, the heat dissipation device 3 further includes a first heat dissipation hole 12 formed on the side baffle 5, and a sliding cover 9 installed on the side baffle 5. Figure 2 As shown, the side baffle 5 is provided with a second heat dissipation hole 24. By adjusting the offset angle between the first heat dissipation hole 12 and the second heat dissipation hole 24, the opening size of the heat dissipation device 3 is adjusted, thereby changing the air convection rate to achieve stepless air flow regulation (i.e., stepless continuous air flow regulation) of the heat dissipation device 3. The fire and dust prevention device for the grinding vehicle described in the specific embodiment of the present invention has a stepless air flow regulation heat dissipation structure, which can effectively prevent the fire hazard caused by the flying of grinding sparks, facilitate the collection of grinding dust to reduce environmental pollution, and is suitable for various types of rail grinding vehicles.

[0044] As attached Figure 6 and 8 As shown, one end of the sliding cover plate 9 protrudes outward along the sliding and disassembly direction to form a first fixing portion 13, and the other end protrudes outward to form a second fixing portion 14. Guide grooves 15 are provided on the first fixing portion 13 and the second fixing portion 14 along the sliding and disassembly direction, and the bolts 16 are fixed to the side baffle 5 after passing through the guide grooves 15. When the bolts 16 are loosened, the sliding cover plate 9 is pushed and pulled along the disassembly direction, and the bolts 16 slide in the guide grooves 15 to adjust the size of the opening of the heat dissipation device 3. The large amount of heat generated during the operation of the grinding trolley can easily cause the internal temperature of the grinding trolley to be too high. The heat dissipation device 3 can achieve forced air cooling and convection heat dissipation, thereby improving the heat dissipation capacity of the grinding trolley and reducing the damage to the grinding motor and other components caused by excessive internal temperature.

[0045] As attached Figure 9 As shown, the side baffles 5 are provided with a pair of guide mounting portions 19 for fixing the sliding cover 9. The two sides of the sliding cover 9 fixed to the guide mounting portions 19 protrude toward the outer surface to form a limiting portion 20. The guide mounting portions 19 and the limiting portions 20 form an interlocking structure. Figure 3 and 4 As shown, the end of the first fixing portion 13 or the second fixing portion 14 protrudes toward the outer surface to form a first handle 10, and a second handle 11 is provided on the side baffle 5. The sliding cover plate 9 of the heat dissipation device 3 can move within the movable limit groove formed by the guide mounting portion 19. The sliding cover plate 9 can be moved to any position of the guide mounting portion 19 by the first handle 10, and the size of the heat dissipation hole can be adjusted by staggering the position between the first heat dissipation hole 12 on the side baffle 5 and the second heat dissipation hole 24 on the sliding cover plate 9, thereby changing the air convection rate and realizing the stepless air adjustment function of the heat dissipation device 3. According to the actual working conditions such as the internal ambient temperature of the grinding cart and the dust collection requirements, the opening size of the heat dissipation device 3 can be adjusted in real time, which can effectively dissipate heat while reducing dust overflow.

[0046] As attached Figure 9As shown, the upper side of the side baffle 5 is curled toward the inner lower part to form a U-shaped first locking portion 17, and the side of the top cover 1 fixed to the side baffle 5 is curled toward the outer upper part to form a U-shaped second locking portion 18. A mutually locked detachable connection structure is formed between the first locking portion 17 and the second locking portion 18. The top cover 1 and the end baffle 2 are both composed of a number of unit plates (small plates) fixedly spliced ​​together. The dust collection channel 4 is welded to the top cover 1, and the dust collection channel 4 is connected to the dust collection device in the grinding vehicle compartment above it through a pipeline. As shown in the attached figure Figure 1 and attached Figure 5 As shown, the top cover 1 is divided into two parts, the left and right sides, with exactly the same structure. There are four small cover plates on one side, which can be connected by welding or bolts. Bolt connection makes it easier to disassemble during maintenance.

[0047] As attached Figure 7 As shown, the side baffle 5 and the end baffle 2 are connected and fixed by a latch 6. A mounting seat 21 for mounting the latch 6 is provided on the side baffle 5, and a locking seat 22 is provided on the end baffle 2 at a position corresponding to the latch 6. An elastic member 23 is sleeved on the outer surface of the latch 6, and the elastic member 23 is also arranged in the mounting seat 21 to prevent the latch 6 from moving during the locking process. The elastic member 23 can be specifically a spring. The side baffle 2 is designed to adopt a detachable connection mechanism. In this embodiment, the connecting sides between the side baffle 5 and the top cover 1 are designed as a U-shaped hook structure (as shown in the attached figure). Figure 9 During installation, the side panels 5 are hooked onto the top cover 1, and then secured relative to the end panels 2 using latches 6. The U-shaped hook structure and latch-type connection ensure the removability of the side panels 5, allowing for quick and easy removal when the grinding device requires maintenance. Compared to traditional rigidly connected side panel structures, this provides more space for maintenance personnel.

[0048] As a preferred specific embodiment of the present invention, the top cover plate 1, the end baffles 2 and the side baffles 5 are all made of aluminum, which effectively realizes the lightweight design of the fireproof and dustproof device 100. The fireproof curtain 8 is made of high-temperature resistant graphite carbon material fireproof cloth, and is installed below the end baffles 2 and the side baffles 5 through a strip-shaped pressure plate 7. The fireproof curtain 8 can also be replaced by fireproof cloth made of other materials. The fireproof curtain supplements the side baffles 5 and the bottom of the end baffles 2 of the fireproof and dustproof device 100, and can more effectively block the high-temperature iron filings and sparks flying outward when the grinding device is grinding, thereby preventing them from damaging the infrastructure around the railway and causing fire hazards.

[0049] By implementing the technical solution of the fire and dust prevention device for the polishing trolley described in the specific embodiment of the present invention, the following technical effects can be produced:

[0050] (1) The fire and dust prevention device for the grinding trolley described in the specific embodiment of the present invention adopts a detachable connection structure between the top cover plate and the side baffles, as well as between the end baffles and the side baffles. Compared with the rigidly connected door panel structure, when the internal structure of the grinding trolley needs to be maintained, the side baffles can be conveniently removed directly, avoiding the baffles from blocking the side space, leaving a larger maintenance operation space for maintenance personnel;

[0051] (2) The fire and dust prevention device for the rail grinding trolley described in the specific embodiment of the present invention adopts a closed structure combining a hook and a latch, which improves the closedness of the rail grinding trolley structure and can effectively reduce the overflow of dust during the grinding process. As a result, the grinding dust can be more effectively collected in the dust collecting device, thereby reducing the harm to workers, pollution to the environment, and damage to equipment caused by dust;

[0052] (3) The fire and dust prevention device for the grinding trolley described in the specific embodiment of the present invention improves the internal heat dissipation of the grinding trolley during operation by adding heat dissipation grooves on the side baffles. The interior of the grinding trolley is cooled by natural wind during operation, effectively avoiding damage to the grinding unit and other components caused by excessive internal temperature of the grinding trolley;

[0053] (4) The fire and dust prevention device for the polishing trolley described in the specific embodiment of the present invention adopts a stepless air adjustment structure composed of a side baffle heat dissipation device, a handle and a movable limit groove (i.e., a guide mounting portion). The size of the heat dissipation groove opening is changed by the handle to change the convection heat dissipation efficiency of the polishing trolley. The size of the heat dissipation groove opening is adjusted in real time according to actual working conditions and needs, which can reduce dust overflow while ensuring heat dissipation performance without affecting the dust collection effect of the polishing trolley.

[0054] (5) The fire and dust prevention device for the grinding trolley described in the specific embodiment of the present invention has plate structures and fire curtains at various locations that can effectively prevent sparks and high-temperature iron filings from flying outwards and damaging other facilities beside the rails or igniting materials around the rails to cause fires. The main structure is made of aluminum, which effectively realizes the lightweight design of the fire and dust prevention system.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above description is only a preferred embodiment of the present invention and does not constitute any formal limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the spirit and technical solution of the present invention, use the methods and technical contents disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention, still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fire and dust prevention device for a grinding trolley, characterized in that: include: A top cover plate (1), an end baffle plate (2), a dust collection channel (4), a side baffle plate (5) and a fire curtain (8); the dust collection channel (4) is arranged at the upper part of the top cover plate (1), and the dust generated during the grinding process enters the dust collection device through the dust collection channel (4); the side baffle plates (5) are arranged at the lower part of the left and right sides of the top cover plate (1) along the working direction of the grinding trolley (100), and the side baffle plates (5) are provided with a heat dissipation device (3); the end baffle plates (2) are arranged at the lower part of the front and rear ends of the top cover plate (1) along the working direction of the grinding trolley (100), and the top cover plate (1) and the side baffle plates (5) are arranged in a manner that the top cover plate (1) and the side baffle plates (5) are connected ... The end baffle (2) and the side baffle (5) are both connected in a detachable manner; the lower parts of the end baffle (2) and the side baffle (5) are both connected with a fire curtain (8); the heat dissipation device (3) comprises a first heat dissipation hole (12) formed on the side baffle (5), and a sliding cover plate (9) installed on the side baffle (5); a second heat dissipation hole (24) is opened on the side baffle (5); the opening size of the heat dissipation device (3) is adjusted by adjusting the staggered angle between the first heat dissipation hole (12) and the second heat dissipation hole (24), thereby changing the air convection rate, so as to achieve the heat dissipation device ( 3) for stepless air adjustment; one end of the sliding cover plate (9) protrudes outwards along the sliding and disassembling direction to form a first fixing portion (13), and the other end protrudes outwards to form a second fixing portion (14); the first fixing portion (13) and the second fixing portion (14) are both provided with guide grooves (15) along the sliding and disassembling direction, and bolts (16) are fixed to the side baffle plate (5) after passing through the guide grooves (15); when the bolts (16) are loosened, the sliding cover plate (9) is pushed and pulled along the disassembling direction, and the bolts (16) slide in the guide grooves (15) to adjust the opening size of the heat dissipation device (3); the side baffle plate (5) is provided with useful The guide mounting portion (19) is fixedly mounted on the sliding cover plate (9), and the two sides where the sliding cover plate (9) and the guide mounting portion (19) are fixed protrude toward the outer surface to form a limiting portion (20), and the guide mounting portion (19) and the limiting portion (20) form an interlocking structure; the upper side edge of the side baffle plate (5) is curled toward the inner lower part to form a U-shaped first locking portion (17), and the side edge where the top cover plate (1) and the side baffle plate (5) are fixed is curled toward the outer upper part to form a U-shaped second locking portion (18), and a mutually locked detachable connection structure is formed between the first locking portion (17) and the second locking portion (18).

2. The fire and dust prevention device for a grinding trolley according to claim 1 is characterized in that: The end of the first fixing portion (13) or the second fixing portion (14) protrudes toward the outer surface to form a first handle (10), and the side baffle (5) is provided with a second handle (11).

3. The fire and dust prevention device for a grinding trolley according to claim 2 is characterized in that: The top cover plate (1) and the end baffle plate (2) are both formed by a plurality of unit plates fixedly spliced ​​together.

4. The fire and dust prevention device for a grinding trolley according to claim 1, 2 or 3, characterized in that: The side baffle (5) and the end baffle (2) are connected and fixed by means of a latch (6); a mounting seat (21) for mounting the latch (6) is provided on the side baffle (5); a locking seat (22) is provided at a position corresponding to the latch (6) on the end baffle (2); an elastic member (23) is sleeved on the outer surface of the latch (6); the elastic member (23) is arranged in the mounting seat (21) at the same time to prevent the latch (6) from moving during the locking process.

5. The fire and dust prevention device for a grinding trolley according to claim 4 is characterized in that: The top cover plate (1), the end baffle plate (2) and the side baffle plate (5) are all made of aluminum.

6. The fire and dust prevention device for a grinding trolley according to claim 1, 2, 3 or 5, characterized in that: The fireproof curtain (8) is made of high-temperature resistant graphite carbon material fireproof cloth and is installed below the end baffle (2) and the side baffle (5) through a strip-shaped pressing plate (7).

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