A redundant PLC control hardware chassis for an asphalt plant
Patent Information
- Application Number
- CN202621216064.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-07
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2036-08-07
AI Technical Summary
When existing redundant PLC control hardware chassis are disassembled, replaced, or the filters are cleaned, the ventilation openings are left open, allowing dust and fumes to enter the chassis, contaminating the PLC unit and causing faults such as dust accumulation and short circuits in the wiring terminals, and poor signal contact.
A redundant PLC control hardware chassis including a door panel, filter, dustproof component, and friction-reducing component was designed. The dustproof component's baffle and counterweight form a gravity reset structure, which automatically seals the ventilation opening and reduces dust entry. The friction-reducing component reduces the friction of the slider through a rotating component, ensuring smooth baffle movement.
It effectively prevents dust from contaminating the PLC control hardware, protects the internal components of the chassis, reduces the risk of failure, and improves the stability of equipment operation.
Smart Images
Figure CN224935901U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of asphalt mixing station electric control equipment especially relates to a redundancy PLC control hardware case for asphalt mixing station. BACKGROUND
[0002] The asphalt mixing station has the problems of poor field conditions, long-term existence of stone dust, sticky asphalt oil fume and low-frequency continuous vibration of equipment, and the production process has the characteristics of continuous uninterrupted operation, therefore, the industry generally adopts double-redundancy PLC control case, two independent PLC control units are used as backup to ensure the stable operation of mixing, conveying and discharging processes, the existing redundancy PLC case is provided with an axial flow fan to form a forced convection heat dissipation structure with a pre-filter, the fan extracts the heat generated by electrical elements in the case, and the filter is arranged between the fan and the ventilation opening of the case to prevent external dust and oil fume from entering the case and polluting the PLC module and terminal.
[0003] The filter of the existing redundancy PLC control hardware case is simply clamped or fixed by screws in the ventilation channel of the fan, and no temporary shielding structure is arranged to be linked with the filter, in the high-dust environment of the asphalt mixing station, when the filter is disassembled, replaced or cleaned, the ventilation opening is directly and completely opened, and the floating stone dust and asphalt oil fume can enter the case through the open ventilation channel, thereby synchronously polluting the two PLC units as backup, and the module terminal is prone to dust accumulation, short circuit and poor signal contact. UTILITY MODEL CONTENTS
[0004] In order to make up for the above shortcomings, the utility model provides a redundancy PLC control hardware case for an asphalt mixing station, which aims to improve the problem in the prior art that the filter of the existing redundancy PLC control hardware case is simply clamped or fixed by screws in the ventilation channel of the fan, no temporary shielding structure is arranged to be linked with the filter, and dust is easily introduced into the case when the filter is disassembled, replaced or cleaned.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a redundancy PLC control hardware case for an asphalt mixing station, comprising a door plate and a filter, a fan is arranged behind the door plate, a ventilation opening is formed through the front side of the door plate, the filter is installed on the front side of the door plate, the rear side of the filter penetrates the ventilation opening and is attached to the front side of the fan, a dustproof assembly is arranged on the rear side of the door plate, and a friction-reducing assembly is arranged behind the door plate.
[0006] The dustproof assembly includes two groups of baffle plates, two groups of fixed blocks one are fixedly connected to rear sides of the door plates, opposite surfaces of the two groups of fixed blocks one are provided with sliding grooves one, upper and lower sides of the two groups of baffle plates are fixedly connected with two groups of sliding blocks one, eight groups of sliding blocks one are respectively and slidingly connected to inner walls of the two groups of sliding grooves one, a fixed block two is fixedly connected to the outer wall of the fan near the front side, front sides of the two groups of fixed blocks two are fixedly connected to rear sides of the two groups of fixed blocks one, and a reset member is arranged behind the door plate.
[0007] As a further description of the above technical solutions:
[0008] The reset member includes two groups of guide members, rear sides of the two groups of baffle plates are provided with guide grooves, front sections of the two groups of guide members are respectively and slidingly connected to inner walls of the two groups of guide grooves, rear ends of the two groups of guide members are fixedly connected with counterweight blocks, opposite surfaces of the two groups of counterweight blocks are fixedly connected with sliding blocks two, and the two groups of fixed blocks two are provided with sliding grooves two away from each other, and the two groups of sliding blocks two are respectively and slidingly connected to inner walls of the two groups of sliding grooves two.
[0009] As a further description of the above technical solutions:
[0010] The friction reduction assembly includes eight groups of rotating members one, one end of each of the eight groups of rotating members one towards the sliding groove one is rotatably connected with the sliding block one, the eight groups of rotating members one are respectively and slidingly connected to inner walls of the two groups of sliding grooves one, one end of each of the two groups of sliding blocks two towards the two groups of sliding grooves two is rotatably connected with four groups of rotating members two, and the eight groups of rotating members two are respectively and slidingly connected to inner walls of the two groups of sliding grooves two.
[0011] As a further description of the above technical solutions:
[0012] The two groups of baffle plates, the two groups of fixed blocks one, the two groups of sliding grooves one, the two groups of fixed blocks two, the two groups of sliding grooves two, the two groups of guide members, the two groups of guide grooves and the two groups of counterweight blocks are symmetrically arranged.
[0013] As a further description of the above technical solutions:
[0014] The guide groove is provided in an inclined shape.
[0015] As a further description of the above technical solutions:
[0016] The two groups of baffle plates are provided with guide inclined surfaces on front sides thereof, and the two groups of guide inclined surfaces are provided in an inward inclination.
[0017] The utility model has the advantages of the following:
[0018] 1.The utility model discloses, through the dustproof subassembly's two groups of baffle cooperation counterweight, guide piece, guide groove constitute gravity reset structure, can automatically make two groups of baffle each other when taking out filter piece and temporarily block the vent of door board, effectively avoid the process of dismantling and replacing filter piece outside dust invades the inside of case through the vent, protect the PLC control hardware in case from dust pollution.
[0019] 2.The utility model discloses, through the antifriction subassembly sets up rotating part one and rotating part two on slider one, slider two, converts the sliding friction between slider one and slide groove one, slider two and slide groove two into rolling friction, greatly reduces the moving resistance, makes slider one, slider two move more smoothly, guarantees the baffle opening and closing action, counterweight lifting reset action sensitive no jam. DRAWINGS
[0020] Figure 1 It is the three-dimensional structure schematic diagram of the whole structure in the utility model;
[0021] Figure 2 It is the three-dimensional structure back view schematic diagram of the dustproof subassembly in the utility model;
[0022] Figure 3 It is the three-dimensional structure schematic diagram of the dustproof subassembly in the utility model;
[0023] Figure 4 It is the three-dimensional structure split schematic diagram of the dustproof subassembly in the utility model;
[0024] Figure 5 It is the three-dimensional structure split schematic diagram of the antifriction subassembly in the utility model.
[0025] LEGEND:
[0026] 1, door board;2, filter piece;3, fan;4, dustproof subassembly;5, antifriction subassembly;41, baffle;42, fixed block one;43, slide groove one;44, slider one;45, fixed block two;46, slide groove two;47, guide piece;48, guide groove;49, counterweight;410, slider two;51, rotating part one;52, rotating part two. DETAILED DESCRIPTION
[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0028] REFERENCE Figure 1 - Figure 3The utility model provides an embodiment: a kind of redundancy PLC control hardware case for asphalt mixing station, including door panel 1 and filter piece 2, fan 3 is provided in the rear of door panel 1, for helping heat dissipation inside box, ventilation opening is opened in the front side of door panel 1, filter piece 2 is installed in the front side of door panel 1, and filter piece 2 rear side penetrates ventilation opening and sticks fan 3 front side, filter piece 2 is the filter piece of common case in prior art, for preventing dust from entering the inside of box, and sealing is completed by its own sealing rubber strip and door panel 1, dustproof assembly 4 is provided in the rear of door panel 1, for temporarily blocking the ventilation opening of door panel 1 when filter piece is disassembled and replaced, to prevent the entry of dust, antifriction assembly 5 is provided in the rear of door panel 1, for reducing the friction of slider one 44 and slider two 410 when moving, to make it more smooth to move.
[0029] With reference to Figure 2 - Figure 4 Dustproof assembly 4 includes two groups of baffle plates 41, for blocking the ventilation opening on door panel 1, to prevent dust from entering the inside of box, guide inclined surface is opened in the front side of two groups of baffle plates 41, and two groups of guide inclined surfaces are all set to be inwardly inclined, for pushing back when filter piece 2 is placed, can make two groups of baffle plates 41 move away from each other, two groups of fixed blocks one 42 are fixedly connected to the rear of door panel 1, for opening sliding slot one 43, sliding slot one 43 is opened in the opposite surface of two groups of fixed blocks one 42, for limiting that slider one 44 can only move in straight line, to limit that baffle plate 41 can only move in straight line, two groups of slider one 44 are fixedly connected to the upper side and lower side of two groups of baffle plates 41, for cooperating with sliding slot one 43 to limit that baffle plate 41 can only move in straight line, eight groups of slider one 44 are slidably connected to the inner wall of two groups of sliding slots one 43, fixed block two 45 is fixedly connected to the outer wall of fan 3 close to the front side, for supporting fan 3, two groups of fixed block two 45 are fixedly connected to the rear of two groups of fixed blocks one 42, reset piece is provided in the rear of door panel 1, for driving two groups of baffle plates 41 to move close to each other, to block the ventilation opening of door panel 1.
[0030] With reference to Figure 3 - Figure 5The reset component includes two sets of guide members 47, which cooperate with guide grooves 48 to drive two sets of baffles 41 to move closer together. Guide grooves 48 are provided on the rear side of both sets of baffles 41. The guide grooves 48 are inclined and are used to cooperate with the guide members 47 to drive the two sets of baffles 41 to move closer together. By moving the two sets of guide members 47 downward, they press the inner walls of the two sets of guide grooves 48, thereby causing the two sets of baffles 41 to move closer together. The front sections of the two sets of guide members 47 are slidably connected to the inner walls of the two sets of guide grooves 48. The rear ends of the two sets of guide members 47 are fixedly connected to counterweights 49 to provide downward force for the guide members 47. Slider blocks 410 are fixedly connected to the opposite sides of the two sets of counterweights 49 to cooperate with slide grooves 46, so that the counterweights 49 can only move in a straight line. Slide grooves 46 are provided on the opposite sides of the two sets of fixed blocks 45 to restrict the sliders 410 to move in a straight line. The two sets of sliders 410 are slidably connected to the inner walls of the two sets of slide grooves 46.
[0031] Reference Figure 3 - Figure 5 The friction reduction component 5 includes eight sets of rotating parts 51, each set of rotating parts 51 being circular, used to reduce the friction force when the slider 44 moves. The eight sets of rotating parts 51 are rotatably connected to the ends of the eight sliders 44 facing the slide groove 43. The eight sets of rotating parts 51 slide on the inner walls of the two slide grooves 43. The ends of the two sliders 410 facing the two slide grooves 46 are each rotatably connected to four sets of rotating parts 52. The rotating parts 52 are two sets of circular parts with a cylindrical center, used to reduce the friction force when the sliders 410 move. The eight sets of rotating parts 52 slide on the inner walls of the two slide grooves 46. The four sets of rotating parts 52 of the same slider 410 slide on one side of the inner wall of the slide groove 46 in pairs.
[0032] Working principle: When installing filter element 2, push it backward through the vent on the front side of door panel 1. The rear side of filter element 2 contacts the inwardly inclined guide slope on the front side of the two sets of baffles 41 and applies force backward, pushing the two sets of baffles 41 to move away from each other in a straight line along the sliding groove 43 on the fixed block 42 via the upper and lower sliders 44. The guide groove 48 inclined on the rear side of the baffles 41 moves along with it. Through the sliding cooperation between the guide 47 and the guide groove 48, the two sets of counterweights 49 are driven to slide upward along the sliding groove 46 on the fixed block 45 via the slider 410. When filter element 2 is installed in place and its rear side is in contact with the front side of fan 3, the two sets of baffles 41 are completely separated, the vent on door panel 1 is open, and fan 3 runs to drive airflow to achieve heat dissipation inside the casing. Filter element 2 simultaneously blocks external dust from entering the casing.
[0033] Further, when the filter 2 is disassembled and replaced, after the filter 2 is pulled outwards, the two sets of counterweight blocks 49 are reset and slide downward along the sliding groove two 46 through the sliding block two 410 under the action of gravity, drive the guide 47 to move downward synchronously and press the inclined inner wall of the guide groove 48, and then drive the two sets of baffles 41 to reset and move closer to each other along the sliding groove one 43 through the sliding block one 44, temporarily block the air vents of the door plate 1, avoid dust from entering the case during replacement, and convert sliding friction into rolling friction during device operation, effectively reduce the friction force when the sliding block one 44 and the sliding block two 410 move, and ensure the smoothness of the opening and closing of the baffle 41 and the lifting of the counterweight block 49.
[0034] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.
Claims
1. A redundant PLC control hardware chassis for an asphalt mixing plant, comprising a door panel (1) and a filter element (2), characterized in that: A fan (3) is provided behind the door panel (1), a ventilation opening is provided through the front side of the door panel (1), a filter (2) is installed on the front side of the door panel (1), and the rear side of the filter (2) passes through the ventilation opening and fits against the front side of the fan (3). A dustproof component (4) is provided on the rear side of the door panel (1), and a friction-reducing component (5) is provided behind the door panel (1). The dustproof component (4) includes two sets of baffles (41). Two sets of fixing blocks (42) are fixedly connected to the rear side of the door panel (1). The two sets of fixing blocks (42) are provided with sliding grooves (43) on opposite sides. Two sets of sliders (44) are fixedly connected to the upper and lower sides of the two sets of baffles (41). The eight sets of sliders (44) are slidably connected to the inner wall of the two sets of sliding grooves (43). A fixing block (45) is fixedly connected to the outer wall of the fan (3) near the front side. The front sides of the two sets of fixing blocks (45) are fixedly connected to the rear side of the two sets of fixing blocks (42). A reset component is provided behind the door panel (1).
2. The redundant PLC control hardware chassis for an asphalt mixing plant according to claim 1, characterized in that: The reset component includes two sets of guide members (47). Guide grooves (48) are provided on the rear side of both sets of baffles (41). The front sections of the two sets of guide members (47) are slidably connected to the inner walls of the two sets of guide grooves (48). The rear ends of the two sets of guide members (47) are fixedly connected to counterweights (49). The opposite surfaces of the two sets of counterweights (49) are fixedly connected to sliders (410). The two sets of fixed blocks (45) are provided with sliding grooves (46) on the side away from each other. The two sets of sliders (410) are slidably connected to the inner walls of the two sets of sliding grooves (46).
3. The redundant PLC control hardware chassis for an asphalt mixing plant according to claim 2, characterized in that: The friction reduction component (5) includes eight sets of rotating parts (51). The eight sets of rotating parts (51) are rotatably connected to one end of the eight sets of sliders (44) facing the slide groove (43). The eight sets of rotating parts (51) slide on the inner wall of the two sets of slide grooves (43). The two sets of sliders (410) facing the two sets of slide grooves (46) are each rotatably connected to four sets of rotating parts (52). The eight sets of rotating parts (52) slide on the inner wall of the two sets of slide grooves (46).
4. A redundant PLC control hardware chassis for an asphalt mixing plant according to claim 2, characterized in that: The two sets of baffles (41), the two sets of fixing blocks (42), the two sets of sliding grooves (43), the two sets of fixing blocks (45), the two sets of sliding grooves (46), the two sets of guides (47), the two sets of guide grooves (48), and the two sets of counterweights (49) are all symmetrically arranged.
5. A redundant PLC control hardware chassis for an asphalt mixing plant according to claim 2, characterized in that: The guide groove (48) is set in an inclined shape.
6. A redundant PLC control hardware chassis for an asphalt mixing plant according to claim 1, characterized in that: Both sets of baffles (41) have guide slopes on their front sides, and both sets of guide slopes are set to be inclined inward.