Vending machine for chemicals

Abstract

To provide an automatic chemical vending machine in which, in the storing and selling process, an impact ignition source cannot be generated due to falling of articles, automatic management of storage and selling of dangerous chemicals is achieved, and a storage chamber therein can satisfy storage requirements for the dangerous chemicals.SOLUTION: An automatic chemical vending machine comprises a cabinet body, a cabinet door, a load sensor, an explosion-proof electric appliance box and a safety partition plate. Wherein the cabinet body is provided with a storage chamber, and the storage chamber is divided into a plurality of layers of storage grids by a built-in bearing plate; the cabinet door corresponds to the opening of the storage chamber; the load sensor is correspondingly arranged in the bearing plate below each storage grid; the explosion-proof electric appliance box is arranged at the upper end of the cabinet main body and is internally provided with an electric control device of the load sensor; a safety partition plate is further arranged between the explosive-proof electric appliance box and the storage chamber.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to the field of chemical storage, and in particular to chemical vending machines. [Background technology]

[0002] Hazardous chemicals are highly toxic chemicals and other chemicals that have properties such as toxicity, corrosiveness, explosiveness, flammability, and combustion support, and are harmful to humans, facilities, and the environment. The storage of hazardous chemicals is mainly divided into large-scale warehouse storage in factories and small-scale storage in laboratories or vending cabinets, among which, for the sale of hazardous chemicals, vending cabinets that generally have relatively large openings and can classify and arrange chemicals are generally used for storage, and the vending cabinets must have relatively high safety, so that they can be easily taken out by users, and the vending cabinets must be relatively safe. In particular, for some flammable and explosive hazardous chemicals, it is necessary to make them easy for users to take out and to avoid the appearance of ignition sources in the space where the chemical vending machine is connected. Common ignition sources include fire, chemical reaction heat, thermal radiation, high-temperature surfaces, friction, and impact. Exposure of high-current electrical components, static electricity on the human body, and violent collisions can all generate ignition sources with sufficient energy.

[0003] In the prior art, several explosion-proof hazardous chemical vending machines have been proposed. For example, Patent CN214964067U proposes a double-sided explosion-proof vending machine that includes a vending cabinet consisting of a housing, a front door, and a rear door, both of which are provided with outlets, and the cabinet is provided with multiple explosion-proof boxes in which electrical appliances are placed, and which automatically dispenses products using spring-loaded rails.

[0004] However, the spring-loaded rails may collide with the cabinet walls when dispensing products, and the multiple electrical appliances inside the cabinet (such as the heat preservation unit, explosion-proof motor, motor drive, etc.) are all installed in the same space as the hazardous chemicals, and all of them may be potential sources of ignition. Therefore, the chemical vending machines in the prior art do not meet the requirements for storing and distributing hazardous chemicals, especially flammable and explosive hazardous chemicals. Summary of the Invention

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a chemical vending machine which can realize automatic management of the inventory and sale of hazardous chemicals, and the internal storage chamber can meet the storage requirements of hazardous chemicals.

[0006] The chemical vending machine includes a cabinet body, a cabinet door, a load sensor, an explosion-proof appliance box, and a safety partition plate, in which the cabinet body has a storage chamber, the storage chamber is partitioned by a built-in load plate to form multiple storage cells, the cabinet door is provided corresponding to the opening of the storage chamber, a load sensor is provided correspondingly in the load plate below each storage cell, the explosion-proof appliance box is located at the upper end of the cabinet body and has an electronic control device connected to the load sensor, and a safety partition plate is further provided between the explosion-proof appliance box and the storage chamber.

[0007] According to the technical solution of the present invention, the user can directly open the cabinet door and take the chemicals in the storage cells through the opening of the storage chamber, and the weight value of the load sensor of the corresponding storage cell will change. The electronic control device receives the weight change situation transmitted from the load sensor in the explosion-proof appliance box and counts it, obtains the type and quantity of the chemicals taken by the user, changes the inventory of the chemicals in the cabinet according to the taken quantity, and also obtains the order form of the chemicals used by the user according to the change in the quantity of the chemicals, thereby realizing the automatic management of the storage and sale of chemicals. Furthermore, during the storage and sale process, the user directly takes the chemicals, so there is no impact ignition source caused by the falling of the items. Furthermore, since the electrical components are centrally installed and completely separated from the storage chamber by a safety partition plate, even if a sealing failure occurs in the explosion-proof appliance box, the electrical components can be avoided from being exposed to the storage chamber as it is, and the storage chamber can be avoided from generating a spark ignition source. Therefore, the storage requirements of flammable and explosive dangerous chemicals can be met, and the safety risks in the storage and sale process of dangerous chemicals can be reduced.

[0008] As a preferred technical solution, the safety partition plate includes two layers of explosion-proof steel plates installed in parallel, and the fire-proof cotton is filled between the explosion-proof steel plates.

[0009] According to the preferred technical solution, by installing two layers of explosion-proof steel plates arranged in parallel and filled with fire-proof cotton between them, the explosion-proof appliance box and the storage chamber can be securely isolated. Even if the sealing of the explosion-proof appliance box is lost, it has an effective explosion-proof effect, and can avoid the electrical components being directly exposed to the storage chamber, thereby improving the safety of the chemical vending machine.

[0010] In a preferred technical solution, the load sensor is an intrinsically safe electrical device, and the load sensor and the electronic control device are communicatively connected via an explosion-proof cable.

[0011] According to the preferred technical solution, by adopting spark-free intrinsically safe electrical appliances and explosion-proof electrical cables, the risk of an ignition source occurring within the storage chamber can be further reduced, and the intrinsic safety can be ensured for the electrical appliances that are inevitably exposed within the storage chamber.

[0012] As a preferred technical solution, the chemical vending machine further includes an explosion-proof electromagnetic lock installed on the edge of the cabinet door, and the explosion-proof electromagnetic lock further has a mechanical lock hole for manual unlocking.

[0013] According to the preferred technical solution, the electromagnetic lock receives a control command to control the cabinet door to automatically lock and unlock, thereby achieving automatic opening and closing of the cabinet door without manual assistance; and the cylinder of the explosion-proof electromagnetic lock further has a mechanical locking hole, so that the chemical vending machine can be unlocked in an emergency such as a power outage or breakdown by manually unlocking the mechanical locking hole.

[0014] As a preferred technical solution, the cabinet door includes a first door body and a second door body which open from both sides, and in the closed position, a closing slit is formed between the two end faces of the first door body and the second door body which are remote from the cabinet body, and a polymerized sheet which covers the closing slit is formed on the outer surface of the first door body and / or the inner surface of the second door body.

[0015] According to this preferred technical solution, a polymer sheet with a simple structure can cover the closing slit between the first door body and the second door body, and abut against the surface of another cabinet door to form a serpentine Z-shaped slit, thereby improving the moisture resistance and leak prevention effects of the chemical vending machine.

[0016] As a preferred technical solution, the explosion-proof electromagnetic lock includes two cylinders respectively installed on the upper and lower edges of the first door body.

[0017] According to this preferred technical solution, the closing method in which the polymerized sheets of the first door body and the second door body are pressed against each other makes it possible to achieve a stable locking effect simply by locking the first door body, and by double-locking the first door body from above and below, the sealing performance when the cabinet door is closed can be further improved by matching the polymerized sheets.

[0018] As a preferred technical solution, the chemical vending machine further includes an explosion-proof proximity switch, which is disposed on a surface of the cabinet body corresponding to the cabinet door, for detecting the distance between the surface of the cabinet body corresponding to the cabinet door and the cabinet door.

[0019] According to the preferred technical solution, when the detection value of the load sensor no longer changes, it is determined that the user's use is completed, and further, by detecting the distance between the cabinet door and the cabinet body by the explosion-proof proximity switch, it is possible to confirm whether the cabinet door is properly closed. When the chemical vending machine is managed unmanned, it is possible to ensure that the cabinet door reaches the locking position and is locked and closed every time a sale is completed.

[0020] As a preferred technical solution, the chemical vending machine further includes a metal handle and a grounding conductor, and the cabinet door surface has an insulating and anticorrosive layer, the metal handle and the cabinet door surface have corresponding through-holes, a metal screw penetrates the insulating and anticorrosive layer and is fastened to the through-hole, one end of the grounding conductor is connected to the tip passing through the metal screw, and the other end is connected to the ground end of the explosion-proof appliance box.

[0021] According to the preferred technical solution, the static electricity dissipation path in the chemical vending machine is as follows: when a person holds the metal handle, static electricity is transferred to the metal handle by the person's hand, then the metal screw of the metal handle conducts static electricity through the insulating anticorrosive layer into the cabinet door, and then the grounding conductor in the cabinet door transfers it to the ground end of the explosion-proof appliance box. This allows static electricity to be dissipated from the human body first every time the chemical vending machine is opened, which can better prevent the formation of an ignition source caused by static electricity accumulation on the human body, causing a fire or explosion. In addition, static electricity can be dissipated by the structure of the chemical vending machine itself, so there is no need to install a separate static electricity dissipation device, and the structure is simple and convenient.

[0022] As a preferred technical solution, the chemical vending machine further includes a hollow tube, one end of which penetrates through the surface of the cabinet door and is hinged to the cabinet door, and the other end of which is movably installed in the position limiting groove, and the position limiting groove opens to the surface of the explosion-proof appliance box facing the user.

[0023] According to the preferred technical solution, the hollow tube can play a role of limiting the position of the cabinet door when it is opened, and can prevent the cabinet door from colliding with the adjacent storage cabinet or other objects due to excessive reversal when the cabinet door is opened, and can reduce the risk of ignition caused by the impact of the cabinet door colliding. At the same time, the hollow tube can also pass wires through it, which can prevent the wires from being bent and damaged during the opening and closing of the cabinet door, and can separate the wires from the storage chamber, thereby improving the safety of the chemical vending machine.

[0024] As a preferred technical solution, the chemical vending machine further includes a drain slot, an inspection hatch is opened above the explosion-proof appliance box, an inspection cap is provided corresponding to the inspection hatch, there is a gap between the inspection cap and the inspection hatch, and the drain slot is provided below the gap.

[0025] According to the preferred technical solution, the chemical vending machine has a drain slot correspondingly arranged below the gap between the inspection cap and the inspection hatch, so as to block and rectify the liquid that has seeped in through the gap, which facilitates the user to inspect and maintain the electrical components in the explosion-proof electrical appliance case, and prevents the electrical appliances from being damaged due to the liquid directly seeping into the explosion-proof electrical appliance case. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a schematic diagram of the overall structure of a chemical vending machine provided in an embodiment of the present invention; [Diagram 2] FIG. 2 is a rear perspective view showing the internal structure of a chemical vending machine provided in an embodiment of the present invention; [Diagram 3] FIG. 2 is a top view of a cabinet door of a chemical vending machine provided in an embodiment of the present invention in a closed position. [Figure 4] FIG. 2 is a structural schematic diagram of an explosion-proof electromagnetic lock of a chemical vending machine provided in an embodiment of the present invention; [Diagram 5] FIG. 2 is a schematic diagram of the rear structure of a metal handle provided in an embodiment of the present invention. [Figure 6] FIG. 2 is a partial structural schematic diagram of a chemical vending machine provided in an embodiment of the present invention. [Figure 7] FIG. 2 is a top perspective structural schematic diagram of a chemical vending machine provided in an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely in accordance with the drawings in the embodiments of the present invention, and it is clear that the described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can obtain without creative labor all belong to the protection scope of the present invention.

[0028] In addition, in the description of the present invention, terms indicating positional relationships such as "center," "upper," "lower," "left," "right," "front," and "rear" are based on the directions or positional relationships shown in the drawings, where "front" refers to the direction toward the user and "rear" refers to the direction away from the user. However, these are merely terms used to enable those skilled in the art to more clearly understand the present invention, and are not intended to indicate or suggest that a device or component necessarily has a specific orientation or must be constructed and operated in a specific orientation, and are not intended to be limitations on the present invention.

[0029] First embodiment Fig. 1 is a schematic diagram of the overall structure of a chemical vending machine provided in an embodiment of the present invention. Fig. 2 is a schematic diagram of the internal structure of a chemical vending machine provided in an embodiment of the present invention, viewed from the rear. Referring to Fig. 1 and Fig. 2, the chemical vending machine includes a cabinet body 1, a cabinet door 2, a load sensor 3, an explosion-proof electrical appliance box 4, and a safety partition plate 5.

[0030] Here, the cabinet body 1 may be formed as a storage cabinet of any shape. Taking FIG. 1 as an example, the cabinet body 1 may be a rectangular explosion-proof frame structure. For example, an explosion-proof case made of double explosion-proof steel plates with a thickness of 1.2 mm and filled with fireproof cotton with a thickness of 40 mm is used as the external frame of the cabinet body 1, and a cavity is formed by being surrounded by the external frame. An explosion-proof electrical appliance box 4 is fitted into the upper part of the cavity, and the lower part is formed as a storage chamber 11, and the two are separated by a safety partition plate 5. The storage chamber 11 may be a semi-closed chamber, with an open opening on the front side (the side facing the user), and preferably, an automatically openable and closable vent hole 13 is further formed on the side wall of the storage chamber 11, and the vent hole 13 can be controlled to be opened and closed according to the storage requirements of different hazardous chemicals, and a loading plate 12 is provided in the storage chamber 11, and the space in the storage chamber 11 is divided into multiple layers of storage cells, and preferably, the storage cell of each layer further has a guard plate 14 provided perpendicular to the loading plate 12, so that each layer can be divided into more storage cells, and each storage cell can have multiple chemicals of the same type arranged in front and back order, making it easy for the user to quickly find the required chemicals.

[0031] The cabinet door 2 is provided corresponding to the opening of the storage chamber 11, and the cabinet door 2 can be a door body that can freely control the opening and closing of the opening of the storage chamber 11, such as a double door body, a sliding door body, a single flip door body, etc., and the door body of the cabinet door 2 generally adopts a metal material, but the cabinet door 2 adopting other materials also falls within the protection scope of the present invention. Preferably, taking FIG. 1 as an example, the cabinet door 2 can include a door body 21 and an explosion-proof panel 22, and the outer and inner surfaces of the door body 21 are respectively covered with the explosion-proof panel 22 having a certain thickness, and the inside of the door body 21 is formed as a hollow cavity with a supporting frame, and the hollow cavity can be filled with fire-proof cotton, which can ensure the strength and explosion-proof performance of the door body, and can reduce the weight of the door body and make the door body lighter.

[0032] The load sensor 3 is installed inside the load plate 12 corresponding to the storage cell. For example, when the load plate 12 of each layer is divided into two storage cells by a guard plate 14, the load plate 12 of this layer is provided with two load sensors 3 corresponding to the two storage cells. Here, the detection position of the load sensor 3 coincides with the arrangement position of the chemicals in the storage cell, that is, the chemicals may be arranged in the storage cell according to the front and rear, and the detection position of the load sensor 3 corresponding to the storage cell should include the front and rear arrangement positions of the chemicals, so that statistics can be performed for all the chemicals arranged in the storage cell and the amount of the chemicals in the storage cell can be counted according to the weight change. Preferably, the load sensor 3 adopts an intrinsically safe electric device, and the load sensor 3 and the electronic control device (not shown) are connected to communicate with each other through an explosion-proof electric cable. By using an intrinsically safe electric device and an explosion-proof electric cable that do not generate sparks at a small current, the risk of an ignition source occurring in the storage chamber 11 can be further reduced, and the intrinsic safety of the electrical components that must be installed in the storage chamber 11 can be ensured.

[0033] The explosion-proof electric appliance box 4 is disposed at the upper end of the cabinet body 1. Specifically, the explosion-proof electric appliance box 4 may be a box with an open top, which is fitted and attached from the top of the cabinet body 1, thereby sealingly isolating the explosion-proof electric appliance box 4 from the storage chamber 11 below. Preferably, the box wall thickness of the explosion-proof electric appliance box 4 used in the present invention is 5mm or more, so as to have excellent explosion isolation performance.

[0034] In particular, a safety partition plate 5 is further provided between the explosion-proof electric appliance box 4 and the storage chamber 11, and the safety partition plate 5 may be any partition plate material having explosion-proof performance, and in this embodiment, preferably, two layers of explosion-proof steel plate are installed in parallel and filled with fireproof cotton between them. This can further separate the explosion-proof electric appliance box 4 and the storage chamber 11, and even if the sealing of the explosion-proof electric appliance box is lost, it has an effective explosion-proof effect, and can prevent electrical components such as the electronic control device of the load sensor 3 from being exposed to the storage chamber 11 as it is, thereby improving the safety of the chemical vending machine.

[0035] In this embodiment, the user can directly open the cabinet door 2 and take the chemicals in the storage cells through the opening of the storage chamber 11, and the weight value of the load sensor 3 of the corresponding storage cell will change. The electronic control device receives the weight change status transmitted from the load sensor 3 in the explosion-proof electric appliance box 4 and counts it, obtains the type and quantity of the chemicals taken by the user, changes the inventory of the chemicals in the cabinet based on the taken quantity, and also obtains the order form of the chemicals used by the user based on the change in the quantity of the chemicals, thereby realizing automatic management of the storage and sale of chemicals. Furthermore, during the storage and sale process, since the user directly takes the chemicals, there is no impact ignition source caused by the falling of the goods. In addition, since the electrical components are installed in a concentrated manner and are completely separated from the storage chamber 11 by the safety partition plate 5, even if a sealing failure occurs in the explosion-proof electric appliance box 4, the electrical components can be avoided from being exposed to the storage chamber 11 as it is, and further, the generation of a spark ignition source in the storage chamber 11 can be avoided. Therefore, the storage requirements for flammable and explosive hazardous chemicals can be met, and the safety risks during the storage and sale of hazardous chemicals can be reduced.

[0036] Second embodiment A second embodiment of the present invention provides a chemical vending machine capable of controlling automatic opening and closing of the cabinet door 2 based on the chemical vending machine of the above embodiment.

[0037] FIG. 3 is a top view of the cabinet door provided in this embodiment. Please refer to FIG. 1 and FIG. 3 together. The cabinet door 2 is a first door body 23 and a second door body 24 that open from both sides. In the closed position, a closing slit 25 is formed between the two closing end faces of the first door body 23 and the second door body 24 that are far from the cabinet body 1. A polymerized sheet (first polymerized sheet 231 and / or second polymerized sheet 241) that covers the closing slit 25 is formed on the outer surface of the first door body 23 and / or the inner surface of the second door body 24. Here, an example will be described in which the cabinet door 2 has both the first polymerized sheet 231 and the second polymerized sheet 241. Preferably, the first polymerized sheet 231 may be extended directly by the explosion-proof panel 22 on the outer surface of the first door body 23, or the second polymerized sheet 241 may be extended by the explosion-proof panel 22 on the inner surface of the second door body 24. Specifically, since the width of the explosion-proof panel 22 on the outer surface of the first door body 23 is larger than the width of the door body 21 of the first door body 23, the explosion-proof panel 22 on the outer surface of the first door body 23 extends from the closing end surface of the door body 21 to form a first polymerized sheet 231 that overlaps and abuts against the outer surface of the second door body 24. Similarly, since the width of the explosion-proof panel 22 on the inner surface of the second door body 24 is also larger than the width of the door body 21, the explosion-proof panel 22 on the inner surface of the second door body 24 extends from the closing end surface of the door body 21 to form a second polymerized sheet 241 that overlaps and abuts against the inner surface of the first door body 23. The installation structure of the polymerized sheet is simple, and the strength of the polymerized sheet formed integrally with the explosion-proof panel 22 is high, resulting in a better explosion-proof effect. In addition, the first polymerized sheet 231 and the second polymerized sheet 241 can cover the closing slit 25 and abut against the surface of the other cabinet door 2, thereby improving the moisture resistance and leak prevention effect of the chemical vending machine.

[0038] Preferably, a seal gasket 26 is further provided on the surface of the first polymer sheet 231 and / or the second polymer sheet 241 corresponding to the closing slit 25. When the first door body 23 and the second door body 24 are closed, the first polymer sheet 231 covers the side of the closing slit 25 facing the user, and the inner surface of the first polymer sheet 231 is in close contact with the outer surface of one end of the closing of the second door body 24, and the second polymer sheet 241 covers the side of the closing slit 25 away from the user, and the second polymer sheet 241 is in close contact with the outer surface of one end of the closing of the first door body 23. In order to closely contact the inner surface of the end, the sealing gasket 26 may preferably be provided on the surface of one end of the first polymeric sheet 231 and / or the second polymeric sheet 241 away from the first door body 23 or the second door body 24, i.e., the sealing gasket 26 is provided on one end beyond the closing slit 25 of the first polymeric sheet 231 and / or the second polymeric sheet 241, thereby further sealing the closing slit between the first polymeric sheet 231 and / or the second polymeric sheet 241 and the surface of the cabinet door 2.

[0039] In a preferred embodiment of the present invention, the length of the door body 21 of the first door body 23 and the second door body 24 is the same as the length of the opening of the storage chamber 11, but the length of the explosion-proof panel 22 on the outer surface of the first door body 23 and the second door body 24 is greater than the length of the opening of the storage chamber 11. When the door body 21 is matched and fitted into the opening of the storage chamber 11, the upper and lower edges of the explosion-proof panel 22 on the outer surface of the door body 21 both protrude into the opening of the storage chamber 11 and are in close contact with the surfaces of the cabinet body 1 above and below the opening of the storage chamber 11, thereby covering the slit between the door body 21 and the opening of the storage chamber 11, and further preventing gas leakage from the slit between the door body 21 and the opening of the storage chamber 11, thereby improving the sealing performance of the chemical vending machine.

[0040] Figure 4 is a structural schematic diagram of the explosion-proof electromagnetic lock of the chemical vending machine provided in this embodiment. As can be seen by referring to Figures 1, 3 and 4, the explosion-proof electromagnetic lock 6 may include a cylinder 61, a control device and a power source, of which the power source may be integrally formed with the control device, or may be provided as two independent electric appliances, or an external power source provided outside the chemical vending machine may be selected as the power source, and is not limited here. The cylinder 61 of the explosion-proof electromagnetic lock 6 may be a commercially available cylinder, and a cylinder with a retractable bolt 611 is taken as an example for description. The cylinder 61 of the explosion-proof electromagnetic lock 6 may be provided on the edge of the cabinet door 2, and the cylinder 61 extends and retracts the bolt 611 from the edge of the door body, and accordingly, the lock groove 18 into which the bolt 611 is inserted is formed on the inner wall of the storage chamber 11, and in particular, the cylinder 61 can be controlled to automatically lock and unlock the cabinet door 2 by receiving a control command from the control device through communication connection with the control device, that is, when receiving a lock command from the control device, the bolt 611 extends into the lock groove 18 to lock the cabinet door 2, and when receiving an unlock command from the control device, the bolt 611 retracts and unlocks, thereby performing automatic opening and closing of the cabinet door 2 without manual assistance. At the same time, the cylinder 61 of the explosion-proof electromagnetic lock 6 further has a mechanical lock hole 612, so that the chemical vending machine can be unlocked in an emergency such as a power outage or breakdown in response to manual unlocking of the mechanical lock hole 612. Preferably, the cylinder 61 of the explosion-proof electromagnetic lock 6 is built into a hollow cavity in the door body 21 , and the mechanical lock hole 612 may be provided so as to protrude from the surface of the cabinet door 2 .In this embodiment, in accordance with the double-door cabinet door 2 in this embodiment, the explosion-proof electromagnetic lock 6 may include two cylinders 61 respectively provided at the upper and lower edges of the hollow cavity of the first door body 23, and the first polymer sheet 231 and the second polymer sheet 241 are pressed against each other to lock the first door body 23, thus achieving a stable locking effect. However, if the first door body 23 is double-locked from above and below, the sealing performance of the cabinet door 2 when closed can be further improved in accordance with the polymer sheet, and the power supply conductor can be directly connected to the explosion-proof electromagnetic lock 6 in the hollow cavity without being exposed on the surface of the cabinet door 2. Furthermore, the mechanical lock hole 612 protrudes from the surface of the cabinet door 2, making it easier for the user to manually unlock the door.

[0041] In addition, the control device and power supply of the explosion-proof electromagnetic lock 6 may be integrally formed and installed in the explosion-proof electrical appliance box 4, or may be independent electrical components. In a preferred embodiment, the control device and power supply are both installed in the explosion-proof electrical appliance box 4, so that the electrical appliances can be better integrated, the structure is compact, and the partition between the electrical appliances and the storage chamber 11 can be guaranteed even in the explosion-proof electrical appliance box 4. In other preferred embodiments, the front wall and the left and right side walls of the explosion-proof electrical appliance box 4 have openings through which the conductor can pass. For example, in some embodiments, a position limiting groove 41 is opened in the front wall of the explosion-proof electrical appliance box 4, and the conductor connected to the cylinder in the cabinet door 2 can enter the explosion-proof electrical appliance box 4 through the position limiting groove 41 in the front wall of the explosion-proof electrical appliance box 4. The conductor in the explosion-proof electrical appliance box 4 is directly led to the outside of the cabinet body 1 through the conductor holes 15 in the left and right side walls. Therefore, the explosion-proof electromagnetic lock 6 may adopt an external power supply, and the conductor between the control device and the external power supply may be connected through the conductor hole 15. In addition, in order to reduce costs, the external power supply may adopt electrical components with a low explosion-proof level. Even if the conductor between the two does not pass through the storage chamber 11, the partition between the electrical components and the storage chamber 11 can be maintained, and dangerous situations such as fire and explosion caused by the communication between the space where the electrical components are located and the storage chamber 11 can be avoided.

[0042] In addition, the chemical vending machine in this embodiment further includes an explosion-proof proximity switch 16, which is provided on the surface of the cabinet body 1 corresponding to the cabinet door 2, and can detect the distance between the surface of the cabinet body 1 corresponding to the cabinet door 2 and the cabinet door 2; that is, when the detection value of the load sensor 3 stops changing, it is determined that the user's use is completed, and further, by detecting the distance between the cabinet door 2 and the cabinet body 1 using the explosion-proof proximity switch 16, it can be confirmed whether the cabinet door 2 is properly closed. When the chemical vending machine is managed unmanned, it can be guaranteed that the cabinet door 2 reaches the lock position and is locked and closed every time a sale is completed.

[0043] Third embodiment A third embodiment of the present invention provides a chemical vending machine that is capable of discharging static electricity carried by the human body before the user opens the cabinet door 2, based on the chemical vending machine in the above embodiment.

[0044] As shown in FIG. 1, a metal handle 7 is provided on the outer surface of the cabinet door 2 of the chemical vending machine, and the metal handle 7 includes a grip part 71 that is disposed toward the user and can be held by a human hand, and a fixing part 72 that is located at one end of the metal handle 7 away from the user and has an attachment structure for fixing the cabinet door 2 to each other. In particular, in this embodiment, the fixing part 72 of the metal handle 7 and the surface of the cabinet door 2 have corresponding fixing holes 73 that penetrate through, and a metal screw penetrates the insulating and corrosion-resistant layer of the cabinet door 2 and is fastened to the fixing hole 73, one end of the grounding conductor is connected to the tip of the metal screw, and the other end is connected to the grounding end of the explosion-proof electrical appliance box. Specifically, the insulating and corrosion-resistant layer can cover the entire surface of the cabinet door 2 except for the part corresponding to the fixing hole 73 of the metal handle 7, so that the insulating and corrosion-resistant effect of the cabinet door 2 can be guaranteed, and the metal handle 7 can penetrate the fixing hole 73 through the metal screw and directly contact the cabinet door 2 for electrical conduction. The metal screw can be connected to the ground conductor in the hollow cavity after penetrating the explosion-proof panel 22 of the door body 21 and entering the hollow cavity of the door body 21. Preferably, an insulating anticorrosive layer is also applied to the outer surface of the metal handle 7 other than the grip portion 71, thereby ensuring the electrostatic conduction performance of the metal handle 7 and preventing corrosion of the metal handle 7.

[0045] In this embodiment, the static electricity dissipation path in the chemical vending machine is such that a person's hand holds the metal handle 7, and static electricity is transferred to the metal handle 7 by the person's hand, and then the static electricity is transmitted to the ground conductor in the cabinet door 2 through the insulating anticorrosive layer by the metal screw of the metal handle 7, and then transferred to the ground end (not shown) of the explosion-proof electric appliance box 4 through the ground conductor. The ground end may be a grounded conductor structure or a ground conductor inside the explosion-proof electric appliance box 4, but is not limited here. In this way, every time the chemical vending machine is opened, static electricity can be dissipated to the human body first, which can better prevent the formation of an ignition source caused by static electricity accumulation on the human body, causing a fire or explosion. In addition, since static electricity can be dissipated by the structure of the chemical vending machine itself, there is no need to install a separate static electricity dissipation device, and the structure is simple and more convenient.

[0046] 5 is a schematic diagram of the rear structure of the metal handle 7 provided in the embodiment of the present invention. Referring to FIG. 1 and FIG. 5 together, the fixing part 72 of the metal handle 7 of the chemical vending machine of this embodiment may be a rectangular airtight cavity structure, and has a handle mounting surface (facing the user) and a cabinet door mounting surface 74 (i.e., the rear surface of the metal handle 7) that are parallel to each other, the grip part 71 is formed as a hidden handle attached to the handle mounting surface so as to be fitted inside, the cabinet door mounting surface 74 is in close contact with the cabinet door 2 and has a corresponding fixing hole 73 penetrating therethrough, and a metal screw can be used to penetrate the cabinet door mounting surface 74 and the surface of the cabinet door 2 and tighten it for installation. Preferably, four fixing holes 73 are formed at each of the four corners of the cabinet door mounting surface 74 of the fixing part 72, thereby improving the stability of the fixing structure between the metal handle 7 and the cabinet door 2.

[0047] In this embodiment, based on the structure of the metal handle 7, the bit of the metal screw can be installed in the cavity of the fixing part 72. Therefore, after the installation of the metal handle 7 is completed, there is no need to separate the bit of the metal screw for painting, and the outer surface of the fixing part 72 of the metal handle 7 can be painted directly. Furthermore, the outer surface of the metal handle 7 can be formed into a complete flat surface, which improves the aesthetics.

[0048] Fourth embodiment The fourth embodiment of the present invention provides a chemical vending machine based on the second or third embodiment, which can protect and separate the conductors between the cabinet door 2 and the explosion-proof electrical appliance box 4.

[0049] Fig. 6 is a schematic diagram of a partial structure of a chemical vending machine provided in this embodiment. With reference to Figs. 1 and 6 together, a hollow tube 8 is further provided between the cabinet door 2 and the cabinet body 1 of the chemical vending machine, and the hollow tube 8 may be any tubular structure having a through passage, for example, a hollow circular tube structure as shown in Fig. 6, or may be other shapes such as a hollow cone, a hollow square pipe, etc., all of which are applicable to the present invention. One end of the hollow tube 8 is hinged to the cabinet door 2, and the other end is connected in the position limiting groove 41 of the cabinet body 1, and can move along the position limiting groove 41. Specifically, the position limiting groove 41 may have an open end 41b and a closed end 41a, the open end 41b is close to the cabinet door 2, and the closed end 41a is away from the cabinet door 2, when the cabinet door 2 is closed, the pressure-proof hollow tube 8 is located at the closed end 41a and is in a folded state close to the side wall of the explosion-proof electrical box 4, when the cabinet door 2 is opened, the hollow tube 8 moves to the open end 41b in the position limiting groove 41, the hollow tube 8 changes from the folded state to a supporting state, and the first door body 23 rotates around the edge of the hinge connection to open, when the hollow tube 8 is located at the open end 41b, the hollow tube 8 is supported by the cabinet door 2 and the side wall of the explosion-proof electrical box 4, and the cabinet door 2 cannot be opened any more. Preferably, when the hollow tube 8 is located at the open end 41b, the included angle between the inner surface of the cabinet door 2 and the surface where the position limiting groove 41 is located is 60°-100°. This allows the hollow tube 8 to act as a stopper, preventing the cabinet door 2 from colliding with an adjacent storage cabinet or other objects due to excessive flipping when opened, thereby reducing the risk of an ignition source being generated by the impact of the cabinet door 2 colliding.

[0050] In particular, the conductor of the electrical device in the cabinet door 2 can be electrically connected to the electrical appliance in the explosion-proof appliance box 4 after passing through the inside of the hollow tube 8, for example, in some preferred embodiments, the power supply of the explosion-proof electromagnetic lock 6 is provided in the explosion-proof appliance box 4, and the connecting conductor between the cylinder 61 and the power supply is provided through the hollow tube 8, while in other preferred embodiments, the grounding conductor connected to the metal screw of the metal handle 7 is also connected to the ground end of the explosion-proof appliance box 4 so as to pass through the hollow tube 8. This avoids bending and damage during the opening and closing process of the cabinet door 2, and the hollow tube 8 contributes to isolating the conductor from the storage chamber, improving the safety of the chemical vending machine.

[0051] Fifth embodiment The fifth embodiment of the present invention provides a chemical vending machine that can better ensure the safe operation of electrical components in the explosion-proof electrical appliance box 4 on the basis of any of the above embodiments.

[0052] FIG. 7 is a schematic diagram of a top perspective structure of a chemical vending machine provided in this embodiment. As shown in FIG. 7, the explosion-proof electric appliance box 4 further has an inspection hatch 42, and the inspection hatch 42 is covered with an inspection cap 43 that matches its shape, and the inspection hatch 42 and the inspection cap 43 are both provided at one end of the cabinet body 1 away from the storage chamber 11, that is, at the top of the cabinet body 1, thereby further preventing the explosion-proof electric appliance box 4 from communicating with the storage chamber 11. It should be noted that the inspection cap 43 may be any cover structure that can control the opening and closing of the inspection hatch 42, such as a flip-off cap, a slide cap, a telescopic cap, etc., and is not limited here. In the closed position, even if the edge of the inspection cap 43 matches the shape and size of the edge of the inspection hatch 42 and can be fitted exactly, it is difficult to completely seal the inspection cap 43 and the inspection hatch 42 due to the gap caused by the fitting. Furthermore, in order to separate the explosion-proof electrical appliance box 4 from the storage chamber 11, the inspection hatch 42 must be located at a position away from the storage chamber 11, i.e., at the top of the cabinet main body 1. Therefore, in the event of rainfall, snowfall, etc., liquids such as rainwater are likely to seep in through the gap (not shown) between the inspection cap 43 and the inspection hatch 42.

[0053] In this embodiment, the chemical vending machine further includes a drain slot 44 correspondingly provided below the gap between the inspection cap 43 and the inspection hatch 42, and the drain slot 44 is formed in a groove structure with both sides higher than the center, and the depth and size of the groove are not limited thereto. By providing the drain slot 44 below the gap between the inspection cap 43 and the inspection hatch 42, it is possible to block and rectify the liquid that has entered through the gap, and to prevent the liquid from directly entering the explosion-proof electrical appliance box 4 and causing the electrical appliance to break down.

[0054] Here, "below" may be directly below or may be slightly offset, and either is within the scope of protection of the present invention as long as it is ensured that the groove opening and the gap correspond to each other.

[0055] In a preferred embodiment, the inspection cap 43 may be attached to the cabinet body 1 such that its long side is hinged to the long side of the inspection hatch 42, so that the user can pull up one side of the inspection cap 43 via the handle on the inspection cap 43 and flip the inspection cap 43 to open it, thereby realizing convenient opening and closing of the inspection cap 43 and the inspection hatch 42. Corresponding to the inspection cap 43 and the inspection hatch 42, the drain slot 44 is formed into an endless groove structure with a shape corresponding to the edge of the inspection hatch 42. For example, for the rectangular inspection hatch 42, the drain slot 44 is formed as an endless rectangular groove surrounding the edge of the inspection hatch 42 so as to receive all liquid that has seeped in through the annular gap between the inspection hatch 42 and the inspection cap 43, and the annular groove can quickly rectify the seeping liquid in both directions. Furthermore, the outer peripheral groove wall 441 of the drain slot 44 is in close contact with the inner wall of the inspection hatch 42 or is formed integrally with the inner wall of the inspection hatch 42, making the inner wall of the inspection hatch 42 the outer peripheral groove wall 441 of the concave groove. This allows liquid flowing down the inner wall of the inspection hatch 42 to be better received and prevents the liquid from entering the explosion-proof electrical appliance box 4 through the gap between the inspection hatch 42 and the drain slot 44. In addition, the inner peripheral groove wall 442 of the drain slot 44 is flush with or slightly lower than the outer peripheral groove wall 441, i.e., the inner peripheral groove wall 442 of the drain slot 44 is flush with or slightly lower than the inspection hatch 42, so that when the inspection cap 43 is closed, the upper end surface of the inner peripheral groove wall 442 abuts against the lower surface of the inspection cap 43 and is limited in position, which prevents liquid from splashing in the drain slot 44 and promotes stable closing of the inspection cap 43 and the inspection hatch 42.

[0056] In particular, since the inspection cap 43 rotates upward about the hinged side to open, when the inspection cap 43 is opened, the water vapor, water droplets, etc. adhering to the inspection cap 43 slide down along the inner surface of the inspection cap 43 to the side where the inspection cap 43 and the inspection hatch 42 are hinged, so that the liquid that slides down when the inspection cap 43 is opened can be quickly discharged by providing the water outlet 45 below the side where the inspection cap 43 and the inspection hatch 42 are hinged. Preferably, the horizontal height of the bottom surface of the drain slot 44 gradually decreases from the side away from the water outlet 45 to the water outlet 45, so that any liquid that enters the drain slot 44 spontaneously flows into the water outlet 45 under the guidance of the height difference and is discharged, so that the structure is simple and a stable rectification effect can be maintained.

[0057] More preferably, as shown in Fig. 2, a drain hole 17 is further opened on the rear surface of the cabinet body 1, the drain hole 17 is provided at a position corresponding to the explosion-proof electrical appliance box 4, and the horizontal height of the drain hole 17 is lower than the water outlet 45, and the water outlet 45 and the drain hole 17 communicate with each other through a drain pipe. In this way, the liquid discharged from the water outlet of the drain slot 44 can be directly discharged outside the chemical vending machine through the drain hole 17 due to the height difference without passing through the storage chamber 11, thereby protecting the chemicals in the storage chamber 11 from getting wet.

[0058] Those skilled in the art can understand that many technical details have been described in the above embodiments to facilitate a deeper understanding of the present application. However, even without these technical details and various changes and modifications based on the above embodiments, the technical solution protected by the scope of protection of the present application can be basically realized. Therefore, in practical applications, various changes in form and detail can be made to the above embodiments without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0059] 1 Cabinet body 11 Storage chamber 12 Load plate 13 Ventilation holes 14 Guard plate 15 Conductor hole 16 Explosion-proof proximity switch 17 Drain hole 18 Lock groove 2 Cabinet Doors 21 Door body 22 Explosion-proof panel 23 First door 231 First Polymer Sheet 24 Second door body 241 Second Polymer Sheet 25 Closure slit 26 Sealing gasket 3 Load Sensor 4 Explosion-proof electrical appliance box 41 Position limiting groove 41a Closed end 41b open end 42 Inspection hatch 43 Inspection cap 44 Drain slot 441 Peripheral groove wall 442 Inner circumferential groove wall 45 Outlet 5 All partitions 6 Explosion-proof electromagnetic lock 61 Cylinder 611 Volts 612 Machine mechanism lock hole 7 Metal Handle 71 Grip section 72 Fixed part 73 Fixing hole 74 Cabinet door mounting surface 8 hollow tube

Claims

1. A chemical vending machine, comprising: a cabinet body having a storage chamber in which multiple storage cells are formed by being partitioned by a built-in load plate; a cabinet door provided corresponding to the opening of the storage chamber; a load sensor provided in a corresponding load plate below each storage cell; an explosion-proof electrical appliance box located at an upper end of a cabinet body and having built-in electrical components including an electronic control device connected to at least the load sensor; and a safety partition plate disposed between the explosion-proof appliance box and the storage chamber.

2. 2. The chemical vending machine according to claim 1, wherein the safety partition plate comprises two layers of explosion-proof steel plates installed in parallel, and fire-proof cotton is filled between the explosion-proof steel plates.

3. 2. The chemical vending machine according to claim 1, wherein the load sensor is an intrinsically safe electrical device, and the load sensor and the electronic control device are communicatively connected via an explosion-proof cable.

4. 2. The chemical vending machine according to claim 1, further comprising an explosion-proof electromagnetic lock provided on an edge of the cabinet door, the explosion-proof electromagnetic lock further having a mechanical lock hole for manual unlocking.

5. The chemical vending machine according to claim 4, characterized in that the cabinet door includes a first door body and a second door body that open from both sides, and in a closed position, a closing slit is formed between two end faces of the first door body and the second door body that are away from the cabinet body, and a polymerized sheet that covers the closing slit is formed on an outer surface of the first door body and / or an inner surface of the second door body.

6. 6. The chemical vending machine according to claim 5, wherein the explosion-proof electromagnetic lock comprises two cylinders respectively provided at the upper and lower edges of the first door body.

7. The chemical vending machine according to any one of claims 4 to 6, further comprising an explosion-proof proximity switch provided on a surface of the cabinet body corresponding to the cabinet door, for detecting a distance between the surface of the cabinet body corresponding to the cabinet door and the cabinet door.

8. The chemical vending machine further includes a metal handle and a grounding conductor; The cabinet door surface has an insulating and anticorrosive layer, the metal handle and the cabinet door surface have corresponding fixing holes penetrating therethrough, and metal screws are fastened to the fixing holes through the insulating and anticorrosive layer; 8. The chemical vending machine according to claim 7, wherein one end of the grounding conductor is connected to the tip that passes through the metal screw, and the other end is connected to the grounding end of the explosion-proof electrical appliance box.

9. The chemical vending machine further includes a hollow tube having one end that penetrates a surface of the cabinet door and is hinged to the cabinet door, and the other end that is movably installed in the position limiting groove, The chemical vending machine according to claim 8, wherein the position limiting groove is opened on a surface of the explosion-proof electrical appliance box facing the user.

10. The chemical vending machine further comprises a drain slot; The chemical vending machine according to claim 1, characterized in that an inspection hatch is opened above the explosion-proof electrical appliance box, an inspection cap is provided corresponding to the inspection hatch, there is a gap between the inspection cap and the inspection hatch, and the drain slot is provided below the gap.

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