Explosion-proof constant-temperature serving trolley

Abstract

The invention belongs to the technical field of serving trolleys, and particularly relates to an anti-explosion constant-temperature serving trolley which comprises a heat preservation box, a heating box, a steam tank, a heater and a heating net pipe. Purified water in the steam tank is heated and evaporated by a heater in the steam tank to form high-temperature hot steam, so that the pressure in the steam tank is increased, the high-temperature hot steam is conveyed into the heating net pipe along a pipeline due to high pressure and then discharged into the heat preservation box through the through holes in the heating net pipe, and after the high-temperature hot steam enters the heat preservation box, the high-temperature hot steam enters the heat preservation box; the temperature in the heat preservation box is increased, the lunch box in the heat preservation box is heated, meals in the lunch box are heated, and heat preservation is conducted; therefore, the heat preservation box is still kept at high temperature after being transported to an underground operation area, so that meals in the lunch box are still in a warm state, the satisfaction degree of dining is improved, and the probability of causing gastrointestinal diseases is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of food delivery vehicles, in particular to an explosion-proof constant temperature food delivery vehicle. Background Art

[0002] Most of the work in the mining area is done in the mine. Since it is very cumbersome and time-consuming for the staff to go back and forth to the ground, most of the staff eat underground. The meals are prepared in the ground canteen and delivered to the underground working area by a food delivery vehicle for the staff to eat.

[0003] A patent application with application number 202111228907.X discloses a sustainable heating intelligent constant temperature food delivery vehicle. The invention uses an electric heating plate in conjunction with a fan to effectively heat the air and achieve circulating heat delivery. The sliding component facilitates the removal and placement of food plates, while also avoiding the phenomenon of rapid loss of heat waves caused by excessive openings.

[0004] A patent application with application number 202122529016.X discloses an air supply device for a sustainable heating intelligent constant temperature food delivery vehicle. The utility model can form a hot air circulation phenomenon by utilizing a fan, an air outlet pipe and an air inlet pipe, ensuring that the air with heat energy fills the entire food box to heat and keep all food warm; at the same time, the air outlet and the air inlet can be used to dry and purify the circulating air to ensure the dryness and cleanliness of the environment in which the food is located.

[0005] A patent application with application number 202123121486.9 discloses a hot air circulation energy storage and heat preservation food delivery vehicle, comprising a vehicle body, a cavity for accommodating materials in the vehicle body, an inlet and outlet connected to the cavity in the vehicle body, an opening and closing door for closing the inlet and outlet, a vertical partition in the middle of the vehicle body that divides the cavity into two chambers, the chamber on one side of the vertical partition being the first storage bin, a transverse partition on the side of the vertical partition facing away from the first storage bin, a second storage bin below the transverse partition, and an energy storage and heat preservation device above the transverse partition that enables each position in the cavity to have a heating and constant temperature function. The food delivery vehicle has a high degree of modularity, fast sorting efficiency, good energy storage and heat preservation effect, and a convenient transportation process.

[0006] Due to the numerous, long, and extensive underground operations, food delivery presents significant challenges. Traditional insulated containers, due to their limited insulation, often result in cold meals arriving at the front lines. This not only affects the nutritional value of the food and reduces worker satisfaction, but can also cause gastrointestinal problems, seriously impacting worker health and work efficiency.

[0007] To this end, the present invention provides an explosion-proof constant temperature food delivery vehicle. Summary of the Invention

[0008] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0009] The technical solution adopted by the present invention to solve its technical problems is: the explosion-proof constant temperature food delivery vehicle described in the present invention includes a base plate; the base plate is fixedly installed on the transport vehicle; the top surface of the base plate is fixedly connected to an insulation box and a heating box; the interior of the insulation box is used to place lunch boxes; the interior of the heating box is provided with a heating mechanism, and the heating mechanism heats the interior of the insulation box; the heating mechanism includes a steam tank arranged at the bottom of the heating box; a heater is fixedly connected to the bottom side of the interior of the steam tank; the interior of the steam tank is filled with pure water; a pipe interface is provided on the top of the steam tank close to the insulation box; a heating network pipe is fixedly connected to the bottom side of the interior of the insulation box; a plurality of through holes are evenly opened on the heating network pipe; the heating network pipe is connected to the pipe interface of the steam tank through a pipe.

[0010] Preferably, a plurality of ridges are symmetrically fixed on both sides of the interior of the thermal insulation box; a tray is slidably mounted between the symmetrical ridges on both sides; the tray and the ridges can be locked by bolts; and the tray is used to place lunch boxes.

[0011] Preferably, a partition is fixedly connected to the middle of the heating box; the steam tank is located below the partition; a water control tank is fixedly connected to the top of the steam tank; a connecting pipe mouth is fixedly connected to the middle of the top surface of the water control tank; the connecting pipe mouth of the water control tank passes through the partition; a pure water barrel is placed on the top surface of the partition; the barrel mouth of the pure water barrel is inserted into the connecting pipe mouth of the water control tank; a water outlet pipe is connected to one side of the bottom surface of the water control tank; the water outlet pipe passes through the top wall of the steam tank, and the outer wall of the water outlet pipe is fixedly connected to the top wall of the steam tank; the bottom end of the water outlet pipe extends into the bottom of the steam tank; a water control valve is provided in the connecting pipe mouth of the water control tank.

[0012] Preferably, the water control valve includes a valve body; the bottom of the valve body is a ring plate, and the top is a hollow cone; the ring plate at the bottom of the valve body is fixedly connected to the inside of the connecting pipe mouth of the water control tank; the hollow cone of the valve body can penetrate the barrel mouth of the pure water bucket; a plurality of water inlet grooves are opened around the outer periphery of the top of the hollow cone of the valve body; the bottom surface of the valve body is fixedly connected to a mounting frame; a sliding rod is slidably installed on the middle part of the mounting frame; a conical plug is fixedly connected to the top of the sliding rod; the conical plug can block and seal the water inlet groove; the bottom end of the sliding rod is fixedly connected to a floating plate.

[0013] Preferably, an insulation mechanism is provided on the side of the insulation box away from the heating box; the insulation mechanism includes an insulation pipe arranged inside the side wall of the insulation box; both ends of the insulation pipe pass through the outer wall of the insulation box away from the heating box; the two ends of the insulation pipe are respectively a water inlet and a water outlet; the water outlet of the insulation pipe is connected to a water pump through a flange; the water outlet end flange of the water pump is connected to a water outlet hose; the water inlet flange of the insulation pipe is connected to a return hose; a heat exchange unit is connected between the water outlet hose and the return hose, and the heat exchange unit is arranged on the side of the engine water tank of the transport vehicle.

[0014] Preferably, the side walls of the insulation box are made of environmentally friendly stainless steel; an inner cavity is provided inside the side walls of the insulation box; and the insulation pipes are arranged inside the inner cavities on both sides.

[0015] Preferably, a heat insulating pad is fixedly connected to a surface of the inner cavity away from the interior of the heat preservation box.

[0016] Preferably, the outer ring of the insulation pipe is evenly covered with elastic rings; both sides of the elastic ring are in compression contact with the inner wall of the inner cavity and the thermal insulation pad respectively.

[0017] Preferably, the heat exchange unit includes heat exchange plates arranged on both sides of the engine water tank of the transport vehicle; corrugated channels are evenly opened inside the heat exchange plates; the ends of the water outlet hose and the return hose are connected with tee pipes; the two ends of the tee pipe and the interfaces of the heat exchange plates are connected through hoses.

[0018] Preferably, a four-way pipe is connected between the water outlet of the insulation pipe and the water inlet end of the water pump; the four-way pipe includes a horizontal pipe and two vertical pipes; a No. 1 control valve is provided in the middle of the horizontal pipe of the four-way pipe; a No. 2 control valve is provided in the middle of the vertical pipe of the four-way pipe away from the water pump; a No. 3 control valve is provided in the middle of the vertical pipe of the four-way pipe close to the water pump; a storage box is fixedly connected to the bottom of the insulation box away from the heating box; a wastewater chamber and a pure water chamber are provided inside the storage box; the bottom pipe of the vertical pipe of the four-way pipe away from the water pump is connected to the wastewater chamber of the storage box; the bottom pipe of the vertical pipe of the four-way pipe close to the water pump is connected to the pure water chamber of the storage box.

[0019] The beneficial effects of the present invention are as follows: 1. The explosion-proof constant temperature meal delivery vehicle described in the present invention is provided with an insulation box, a heating box, a steam tank, a heater and a heating network pipe; the heater inside the steam tank heats and evaporates the pure water inside the steam tank to form high-temperature hot steam, which increases the pressure inside the steam tank. The high pressure causes the high-temperature hot steam to be transported along the pipeline to the inside of the heating network pipe, and then discharged into the inside of the insulation box through the through holes on the heating network pipe. After the high-temperature hot steam enters the insulation box, the temperature inside the insulation box is increased, and the lunch box inside the insulation box is heated, so that the food inside the lunch box is heated and kept warm; thereby, the insulation box still maintains a high temperature after being transported to the working area underground, and the food inside the lunch box is still in a warm state, thereby improving the satisfaction with the meal and reducing the probability of causing gastrointestinal diseases.

[0020] 2. The explosion-proof constant temperature food delivery vehicle described in the present invention is provided with an insulation pipe, a water pump, a water outlet hose, a return hose and a heat exchange unit; the water pump draws out the circulating water inside the insulation pipe on the inner wall of the insulation box, and transports it to the inside of the heat exchange unit along the water outlet hose. When the transport vehicle is moving and transported underground, the high temperature generated by the transport vehicle engine causes the temperature of the engine water tank to rise. The heat exchange unit is arranged on the side of the engine water tank of the transport vehicle, and the heat exchange unit exchanges heat with the engine water tank, so that the circulating water inside the heat exchange unit is heated; the heated circulating water is transported back to the insulation pipe on the inner wall of the insulation box along the return hose, realizing the circulation of the circulating water, thereby utilizing the high temperature generated by the transport vehicle engine to provide additional heat energy for the insulation box, which not only reduces the dependence on external energy, but also reduces the operating cost; at the same time, it also embodies the concept of environmental protection and energy saving, and meets the requirements of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a perspective view of the present invention; Figure 2 It is the internal structure diagram of the heat preservation box of the present invention; Figure 3 It is a three-dimensional diagram of the heating box of the present invention; Figure 4 is a cross-sectional view of the heating box of the present invention; Figure 5 It is a cross-sectional view of the central control water tank of the present invention; Figure 6 It is a front view of the heat preservation box and heat preservation mechanism and a schematic diagram of the flow direction of heat preservation circulating water in the present invention; Figure 7 is a side wall sectional view of the heat preservation box of the present invention; Figure 8 It is a three-dimensional diagram of the heat preservation mechanism of the present invention; Figure 9 Schematic diagram of the flow direction of the heat preservation circulating water of the heat preservation mechanism of the present invention; Figure 10 Schematic diagram of the flow direction of the replacement and replenishment of circulating water in the heat preservation mechanism of the present invention; Figure 11 is a cross-sectional view of a heat exchange plate in the present invention; In the figure: 1. Base plate; 2. Insulation box; 3. Heating box; 4. Steam tank; 5. Heater; 6. Heating mesh pipe; 7. Raised strip; 8. Tray; 9. Partition; 10. Water control tank; 12. Pure water bucket; 13. Water outlet pipe; 14. Valve body; 15. Water inlet trough; 16. Mounting frame; 17. Slide rod; 18. Conical plug; 19. Float; 20. Insulation pipe; 21. Water pump; 22. Water outlet hose; 23. Return hose; 24. Inner cavity; 25. Insulation pad; 26. Elastic ring; 27. Heat exchange plate; 28. Corrugated channel; 29. Tee pipe; 30. Four-way pipe; 31. Control valve No. 1; 32. Control valve No. 2; 33. Control valve No. 3; 34. Storage box. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figures 1 to 4 As shown, an explosion-proof constant temperature meal delivery vehicle according to an embodiment of the present invention comprises a bottom plate 1; the bottom plate 1 is fixedly mounted on the transport vehicle; an insulation box 2 and a heating box 3 are fixedly connected to the top surface of the bottom plate 1; the interior of the insulation box 2 is used to place meal boxes; a heating mechanism is provided inside the heating box 3, and the heating mechanism heats the interior of the insulation box 2; the heating mechanism comprises a steam tank 4 provided at the bottom of the heating box 3; a heater 5 is fixedly connected to the bottom side of the interior of the steam tank 4; pure water is filled in the steam tank 4; a pipe interface is provided on the top of the steam tank 4 close to the side of the insulation box 2; a heating network pipe 6 is fixedly connected to the bottom side of the interior of the insulation box 2; a plurality of through holes are evenly opened on the heating network pipe 6; the heating network pipe 6 is connected to the pipe interface of the steam tank 4 through a pipe; Due to the characteristics of underground working areas, such as numerous points, long lines and wide areas, catering delivery faces huge challenges. Traditional insulated boxes have limited insulation effect, which often causes meals to be cold when they are delivered to the front line. This not only affects the nutritional value of the food and reduces the workers' dining satisfaction, but may also cause gastrointestinal diseases, seriously affecting their physical health and work efficiency. Therefore, the present invention provides an explosion-proof constant temperature food delivery vehicle. During work, when delivering meals to workers working underground, the lunch boxes are placed inside the thermal insulation box 2, and pure water is added to the steam tank 4. The heater 5 inside the steam tank 4 heats and evaporates the pure water inside the steam tank 4 to form high-temperature hot steam, which increases the pressure inside the steam tank 4. The high pressure causes the high-temperature hot steam to be transported along the pipeline to the inside of the heating network pipe 6, and then discharged into the inside of the thermal insulation box 2 through the through holes on the heating network pipe 6. After the high-temperature hot steam enters the thermal insulation box 2, the temperature inside the thermal insulation box 2 rises, heating the lunch box inside the thermal insulation box 2, and heating the food inside the lunch box and keeping it warm; as a result, the thermal insulation box 2 still maintains a high temperature after being transported to the working area underground, and the food inside the lunch box is still in a warm state, thereby improving the satisfaction with the meal and reducing the probability of causing gastrointestinal diseases.

[0025] like Figures 1 to 2 As shown, a plurality of ridges 7 are symmetrically fixed on both sides of the interior of the thermal insulation box 2; a tray 8 is slidably mounted between the symmetrical ridges 7 on both sides; the tray 8 and the ridges 7 can be locked by bolts; the tray 8 is used to place a lunch box; By providing multiple pairs of convex strips 7, it is convenient to install the trays 8, and the trays 8 are used to divide the thermal insulation box 2 into multiple areas. The height of each area can be controlled and adjusted, that is, the distance between the two trays 8 can be controlled. Different types of meals can be stored and heated independently on the trays 8 in each area, avoiding the cross-flavoring and mutual influence between different foods; it not only improves the flexibility of meal delivery, but also meets diverse dietary needs.

[0026] like Figures 1 to 5 As shown, a partition 9 is fixedly connected to the middle of the heating box 3; the steam tank 4 is located below the partition 9; a water control tank 10 is fixedly connected to the top of the steam tank 4; a connecting pipe mouth is fixedly connected to the middle of the top surface of the water control tank 10; the connecting pipe mouth of the water control tank 10 passes through the partition 9; a pure water bucket 12 is placed on the top surface of the partition 9; the barrel mouth of the pure water bucket 12 is inserted into the connecting pipe mouth of the water control tank 10; a water outlet pipe 13 is connected to one side of the bottom surface of the water control tank 10; the water outlet pipe 13 passes through the top wall of the steam tank 4, and the outer wall of the water outlet pipe 13 is fixed to the top wall of the steam tank 4; the bottom end of the water outlet pipe 13 extends into the bottom of the steam tank 4; a water control valve is provided in the connecting pipe mouth of the water control tank 10; The water control valve includes a valve body 14; the bottom of the valve body 14 is a ring plate, and the top is a hollow cone; the ring plate at the bottom of the valve body 14 is fixedly connected to the inside of the connecting pipe mouth of the water control tank 10; the hollow cone of the valve body 14 can penetrate the barrel mouth of the pure water bucket 12; a plurality of water inlet grooves 15 are formed around the outer periphery of the top of the hollow cone of the valve body 14; a mounting frame 16 is fixedly connected to the bottom surface of the valve body 14; a sliding rod 17 is slidably mounted on the middle part of the mounting frame 16; a conical plug 18 is fixedly connected to the top of the sliding rod 17; the conical plug 18 can block and seal the water inlet groove 15; the bottom end of the sliding rod 17 is fixedly connected to a floating plate 19; The pure water barrel 12 in this application is a conventional barreled pure drinking water on the market; by using barreled pure drinking water, the cleanliness of the interior of the insulation box 2 is effectively guaranteed; During operation, after the lunch box is placed inside the thermal insulation box 2, the pure water barrel 12 is placed upside down on the top surface of the partition 9, so that the barrel mouth of the pure water barrel 12 is inserted into the connecting pipe mouth at the top of the water control tank 10, and the barrel mouth sealing cover of the pure water barrel 12 is penetrated by the hollow cone of the valve body 14, so that the pure water inside the pure water barrel 12 passes through the water inlet groove 15 and enters the valve body 14, and the pure water passes through the valve body 14 and enters the water control tank 10, and then enters the bottom of the steam tank 4 along the water outlet pipe 13. The heater 5 heats and evaporates the pure water inside the steam tank 4 to form high-temperature hot steam, which increases the pressure inside the steam tank 4; When the level of the purified water in the steam tank 4 exceeds the bottom of the water outlet pipe 13, the pressure inside the steam tank 4 increases, causing the purified water in the water outlet pipe 13 to be blocked, causing the purified water level in the water control tank 10 to rise. Due to the buoyancy of the float plate 19, the float plate 19 moves upward, pushing the slide rod 17 and the tapered plug 18 upward. The tapered plug 18 blocks and seals the water inlet trough 15, thereby stopping the addition of purified water. When the level of the purified water in the steam tank 4 drops below the water outlet pipe 13, the purified water in the water control tank 10 flows into the steam tank 4 along the water outlet pipe 13, causing the float 19, the slide rod 17 and the tapered plug 18 to move downward, opening the water inlet trough 15, allowing the purified water in the purified water barrel 12 to flow into the water control tank 10, and continuing to add purified water to the steam tank 4; The amount of pure water in the steam tank 4 is effectively controlled by the control valve, thereby effectively ensuring the amount of high-temperature hot steam generated, thereby ensuring that the temperature of the insulation box 2 is constant.

[0027] like Figure 1 、 Figures 6 to 10As shown, a heat preservation mechanism is provided on the side of the heat preservation box 2 away from the heating box 3; the heat preservation mechanism includes a heat preservation pipe 20 provided inside the side wall of the heat preservation box 2; both ends of the heat preservation pipe 20 pass through the outer wall of the heat preservation box 2 away from the heating box 3; the two ends of the heat preservation pipe 20 are respectively a water inlet and a water outlet; the water outlet of the heat preservation pipe 20 is connected to a water pump 21 through a flange; the water outlet end flange of the water pump 21 is connected to a water outlet hose 22; the water inlet flange of the heat preservation pipe 20 is connected to a return hose 23; a heat exchange unit is connected between the water outlet hose 22 and the return hose 23, and the heat exchange unit is provided on the side of the engine water tank of the transport vehicle; In this application, the insulation pipe 20 is made of copper pipe, which not only has good heat conduction effect, but also has a soft quality and is convenient for bending and laying the pipe; During operation, the water pump 21 draws out the circulating water inside the insulated pipe 20 on the inner wall of the insulated box 2 and transports it to the inside of the heat exchange unit along the water outlet hose 22. When the transport vehicle is moving and transporting underground, the high temperature generated by the transport vehicle engine causes the temperature of the engine water tank to rise. The heat exchange unit is arranged on the side of the engine water tank of the transport vehicle. The heat exchange unit exchanges heat with the engine water tank, so that the circulating water inside the heat exchange unit is heated; the heated circulating water is transported back to the inside of the insulated pipe 20 on the inner wall of the insulated box 2 along the return hose 23; the circulating water passes through the outlet of the insulated pipe 20, the water pump 21, the water outlet hose 22, the heat exchange unit and the return hose 23 in sequence, and then flows back to the insulated pipe 20 through the water inlet of the insulated pipe 20, realizing the circulation of the circulating water, thereby utilizing the high temperature generated by the transport vehicle engine to provide additional heat energy for the insulated box 2, which not only reduces the dependence on external energy, but also reduces the operating cost; at the same time, it also embodies the concept of environmental protection and energy saving, and meets the requirements of sustainable development.

[0028] like Figure 7 As shown, the side wall of the insulation box 2 is made of environmentally friendly stainless steel; an inner cavity 24 is opened inside the side wall of the insulation box 2; the insulation pipe 20 is arranged inside the inner cavity 24 on both sides; a heat insulation pad 25 is fixedly connected to the side of the inner cavity 24 away from the interior of the insulation box 2; an elastic ring 26 is evenly sleeved on the outer ring of the insulation pipe 20; the two sides of the elastic ring 26 are respectively in extrusion contact with the inner wall of the inner cavity 24 and the heat insulation pad 25; The main body of the thermal insulation box 2 in this application is made of high-quality environmentally friendly stainless steel; it not only has good corrosion resistance and high temperature resistance, but also meets food safety standards, ensuring the hygiene and safety of meals during transportation; at the same time, stainless steel is easy to clean and maintain, extending the service life of the equipment; The elastic ring 26 is provided to securely mount the insulated pipe 20 within the inner cavity 24 of the side wall of the insulated box 2, effectively preventing the insulated pipe 20 made of copper from contacting the insulated box 2 made of stainless steel, thereby preventing potential corrosion of the insulated pipe 20. Furthermore, the elastic ring 26 can effectively provide shock absorption for the insulated pipe 20, thereby improving the safety of the insulated pipe 20. By providing the heat-insulating pad 25 , the heat inside the insulation box 2 is effectively prevented from being dissipated to the outside of the insulation box 2 , thereby effectively improving the insulation effect of the insulation box 2 and preventing the staff from being burned by the outer wall of the insulation box 2 .

[0029] like Figures 6 to 11 As shown, the heat exchange unit includes heat exchange plates 27 arranged on both sides of the engine water tank of the transport vehicle; the interior of the heat exchange plates 27 is uniformly provided with corrugated channels 28; the ends of the water outlet hose 22 and the return hose 23 are both connected to a tee pipe 29; both ends of the tee pipe 29 are connected to the interfaces of the heat exchange plates 27 through hoses; During operation, the heat exchange unit is set on the side of the engine water tank of the transport vehicle, that is, the two heat exchange plates 27 are respectively attached to the side of the engine water tank; when the circulating water is transported along the water outlet hose 22, the circulating water is diverted through the tee pipe 29 and transported to the heat exchange plates 27 on both sides, and the circulating water exchanges heat through multiple corrugated channels 28 inside the heat exchange plate 27. The heated circulating water then passes through the confluence of the tee pipe 29 and returns to the insulation pipe 20 along the return hose 23; the circulating water is diverted and decelerated by multiple corrugated channels 28, so that the circulating water can fully exchange heat, ensuring that the circulating water is effectively heated, and improving the heat exchange efficiency of the circulating water.

[0030] like Figures 6 to 11 As shown, a four-way pipe 30 is connected between the water outlet of the insulation pipe 20 and the water inlet end of the water pump 21; the four-way pipe 30 includes a horizontal pipe and two vertical pipes; a No. 1 control valve 31 is provided in the middle of the horizontal pipe of the four-way pipe 30; a No. 2 control valve 32 is provided in the middle of the vertical pipe of the four-way pipe 30 away from the water pump 21; a No. 3 control valve 33 is provided in the middle of the vertical pipe of the four-way pipe 30 close to the water pump 21; a storage box 34 is fixedly connected to the bottom of the insulation box 2 away from the heating box 3; a wastewater chamber and a pure water chamber are provided inside the storage box 34; the bottom pipe of the vertical pipe of the four-way pipe 30 away from the water pump 21 is connected to the wastewater chamber of the storage box 34; the bottom pipe of the vertical pipe of the four-way pipe 30 close to the water pump 21 is connected to the pure water chamber of the storage box 34; During operation, when the circulating water inside the insulation mechanism is circulated and insulated, at this time, the No. 1 control valve 31 on the four-way pipe 30 is opened, the No. 2 control valve 32 and the No. 3 control valve 33 are closed, and the water pump 21 draws out the circulating water inside the insulation pipe 20 on the inner wall of the insulation box 2, and transports it to the inside of the heat exchange plate 27 along the water outlet hose 22 through the four-way pipe 30, and exchanges heat with the engine water tank, so that the circulating water inside the heat exchange plate 27 is heated; the heated circulating water is then transported back to the inside of the insulation pipe 20 on the inner wall of the insulation box 2 along the return hose 23, thereby realizing the circulation of the circulating water for insulation; by separating the storage box 34 during the circulation insulation, the circulation path and water volume of the circulating water inside the insulation mechanism are reduced, thereby effectively reducing the heat loss of the circulating water; When the circulating water inside the insulation mechanism is replaced and replenished, at this time, the No. 1 control valve 31 on the four-way pipe 30 is closed, and the No. 2 control valve 32 and the No. 3 control valve 33 are opened; when the water pump 21 is working, the pure water in the pure water cavity of the storage box 34 is extracted through the No. 3 control valve 33 on the four-way pipe 30, and is transported along the water outlet hose 22, the heat exchange plate 27, the return hose 23 and the insulation pipe 20. The pure water discharges the circulating water after use inside, and the used circulating water is then discharged into the waste water cavity of the storage box 34 through the No. 2 control valve 32 on the four-way pipe 30; thereby realizing the replacement and replenishment of the circulating water, making it convenient for the staff to replace the circulating water and ensuring the cleanliness of the pipe inside the insulation mechanism.

[0031] Working principle: Place the pure water bucket 12 upside down on the top surface of the partition 9, so that the mouth of the pure water bucket 12 is inserted into the connecting pipe mouth at the top of the water control tank 10. The sealing cover of the mouth of the pure water bucket 12 is penetrated by the hollow cone of the valve body 14, so that the pure water inside the pure water bucket 12 passes through the water inlet groove 15 and enters the valve body 14. The pure water passes through the valve body 14 and enters the water control tank 10, and then enters the bottom of the steam tank 4 along the water outlet pipe 13. The heater 5 heats and evaporates the pure water inside the steam tank 4 to form high-temperature hot steam, which increases the pressure inside the steam tank 4. When the level of the purified water in the steam tank 4 exceeds the bottom of the water outlet pipe 13, the pressure inside the steam tank 4 increases, causing the purified water in the water outlet pipe 13 to be blocked, causing the purified water level in the water control tank 10 to rise. Due to the buoyancy of the float plate 19, the float plate 19 moves upward, pushing the slide rod 17 and the tapered plug 18 upward. The tapered plug 18 blocks and seals the water inlet trough 15, thereby stopping the addition of purified water. When the level of the purified water in the steam tank 4 drops below the water outlet pipe 13, the purified water in the water control tank 10 flows into the steam tank 4 along the water outlet pipe 13, causing the float 19, the slide rod 17 and the tapered plug 18 to move downward, opening the water inlet trough 15, allowing the purified water in the purified water barrel 12 to flow into the water control tank 10, and continuing to add purified water to the steam tank 4; The lunch box is placed inside the thermal insulation box 2. The heater 5 inside the steam tank 4 heats and evaporates the pure water inside the steam tank 4 to form high-temperature hot steam, which increases the pressure inside the steam tank 4. The high pressure causes the high-temperature hot steam to be transported along the pipeline to the inside of the heating network pipe 6, and then discharged into the thermal insulation box 2 through the through holes on the heating network pipe 6. After the high-temperature hot steam enters the thermal insulation box 2, the temperature inside the thermal insulation box 2 rises, heating the lunch box inside the thermal insulation box 2, and thus heating the food inside the lunch box. When the transport vehicle is moving and transporting underground, the high temperature generated by the operation of the transport vehicle engine causes the temperature of the engine water tank to rise; at this time, the No. 1 control valve 31 on the four-way pipe 30 is opened, the No. 2 control valve 32 and the No. 3 control valve 33 are closed, and the water pump 21 draws out the circulating water inside the insulation pipe 20 on the inner wall of the insulation box 2, and transports it to the inside of the heat exchange plate 27 along the water outlet hose 22 through the four-way pipe 30, and exchanges heat with the engine water tank, so that the circulating water inside the heat exchange plate 27 is heated; the heated circulating water is then transported back to the inside of the insulation pipe 20 on the inner wall of the insulation box 2 along the return hose 23, thereby realizing the circulation of the circulating water for insulation; by separating the storage box 34 during the circulation insulation, the circulation path and water volume of the circulating water inside the insulation mechanism are reduced, thereby effectively reducing the heat loss of the circulating water; When the circulating water inside the insulation mechanism has been used for a certain period of time and the heat exchange efficiency is low, the circulating water inside the insulation mechanism needs to be replaced and supplemented. At this time, the No. 1 control valve 31 on the four-way pipe 30 is closed, and the No. 2 control valve 32 and the No. 3 control valve 33 are opened; when the water pump 21 is working, the pure water in the pure water cavity of the storage box 34 is extracted through the No. 3 control valve 33 on the four-way pipe 30, and is transported along the water outlet hose 22, the heat exchange plate 27, the return hose 23 and the insulation pipe 20. The pure water discharges the circulating water after use inside, and the used circulating water is then discharged into the waste water cavity of the storage box 34 through the No. 2 control valve 32 on the four-way pipe 30; thereby realizing the replacement and supplement of the circulating water, facilitating the staff to replace the circulating water, and ensuring the cleanliness of the pipe inside the insulation mechanism.

[0032] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof constant temperature food delivery vehicle, characterized by: The invention comprises a bottom plate; the bottom plate is fixedly mounted on the transport vehicle; the top surface of the bottom plate is fixedly connected to a heat preservation box and a heating box; the interior of the heat preservation box is used to place the lunch box; the interior of the heating box is provided with a heating mechanism, and the heating mechanism heats the interior of the heat preservation box; The heating mechanism includes a steam tank arranged at the bottom of the heating box; a heater is fixedly connected to the inner bottom side of the steam tank; pure water is filled inside the steam tank; a pipe interface is provided on the top of the steam tank close to the side of the insulation box; a heating mesh pipe is fixedly connected to the inner bottom side of the insulation box; a plurality of through holes are evenly opened on the heating mesh pipe; the heating mesh pipe is connected to the pipe interface of the steam tank through a pipe.

2. The explosion-proof constant temperature food delivery vehicle according to claim 1, characterized in that: A plurality of ridges are symmetrically fixed on both sides of the interior of the thermal insulation box; a tray is slidably mounted between the symmetrical ridges on both sides; the tray and the ridges can be locked by bolts; and the tray is used to place a lunch box.

3. The explosion-proof constant temperature food delivery vehicle according to claim 1, characterized in that: A partition is fixedly connected to the middle of the heating box; the steam tank is located below the partition; a water control tank is fixedly connected to the top of the steam tank; a connecting pipe is fixedly connected to the middle of the top surface of the water control tank; the connecting pipe of the water control tank passes through the partition; a pure water barrel is placed on the top surface of the partition; the barrel mouth of the pure water barrel is inserted into the connecting pipe of the water control tank; a water outlet pipe is connected to one side of the bottom surface of the water control tank; the water outlet pipe passes through the top wall of the steam tank, and the outer wall of the water outlet pipe is fixed to the top wall of the steam tank; the bottom end of the water outlet pipe extends into the bottom of the steam tank; a water control valve is provided in the connecting pipe of the water control tank.

4. The explosion-proof constant temperature food delivery vehicle according to claim 3, characterized in that: The water control valve includes a valve body; the bottom of the valve body is a ring plate, and the top is a hollow cone; the ring plate at the bottom of the valve body is fixedly connected to the inside of the connecting pipe mouth of the water control tank; the hollow cone of the valve body can penetrate the barrel mouth of the pure water bucket; a plurality of water inlet grooves are opened around the outer periphery of the top of the hollow cone of the valve body; the bottom surface of the valve body is fixedly connected to a mounting frame; a sliding rod is slidably installed in the middle of the mounting frame; a conical plug is fixedly connected to the top of the sliding rod; the conical plug can block and seal the water inlet groove; the bottom end of the sliding rod is fixedly connected to a floating plate.

5. The explosion-proof constant temperature food delivery vehicle according to claim 1, characterized in that: An insulation mechanism is provided on the side of the insulation box away from the heating box; the insulation mechanism includes an insulation pipe arranged inside the side wall of the insulation box; both ends of the insulation pipe pass through the outer wall of the insulation box away from the heating box; the two ends of the insulation pipe are respectively a water inlet and a water outlet; the water outlet of the insulation pipe is connected to a water pump through a flange; the water outlet end flange of the water pump is connected to a water outlet hose; the water inlet flange of the insulation pipe is connected to a return hose; a heat exchange unit is connected between the water outlet hose and the return hose, and the heat exchange unit is arranged on the side of the engine water tank of the transport vehicle.

6. The explosion-proof constant temperature food delivery vehicle according to claim 5, characterized in that: The side walls of the insulation box are made of environmentally friendly stainless steel; an inner cavity is provided inside the side walls of the insulation box; and the insulation pipes are arranged inside the inner cavities on both sides.

7. The explosion-proof constant temperature food delivery vehicle according to claim 6, characterized in that: A heat insulation pad is fixedly connected to a surface of the inner cavity away from the interior of the heat preservation box.

8. The explosion-proof constant temperature food delivery vehicle according to claim 7, characterized in that: The outer ring of the heat-insulating pipe is evenly covered with elastic rings; two sides of the elastic ring are respectively in extrusion contact with the inner wall of the inner cavity and the heat-insulating pad.

9. The explosion-proof constant temperature food delivery vehicle according to claim 5, characterized in that: The heat exchange unit includes heat exchange plates arranged on both sides of the engine water tank of the transport vehicle; corrugated channels are evenly opened inside the heat exchange plates; the ends of the water outlet hose and the return hose are connected to tee pipes; the two ends of the tee pipe and the interfaces of the heat exchange plates are connected through hoses.

10. The explosion-proof constant temperature food delivery vehicle according to claim 5, characterized in that: A four-way pipe is connected between the water outlet of the insulation pipe and the water inlet end of the water pump; the four-way pipe includes a horizontal pipe and two vertical pipes; a No. 1 control valve is provided in the middle of the horizontal pipe of the four-way pipe; a No. 2 control valve is provided in the middle of the vertical pipe of the four-way pipe away from the water pump; a No. 3 control valve is provided in the middle of the vertical pipe of the four-way pipe close to the water pump; a storage box is fixedly connected to the bottom of the insulation box away from the heating box; a wastewater chamber and a pure water chamber are provided inside the storage box; the bottom pipe of the vertical pipe of the four-way pipe away from the water pump is connected to the wastewater chamber of the storage box; the bottom pipe of the vertical pipe of the four-way pipe close to the water pump is connected to the pure water chamber of the storage box.

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