Multi-layer heat insulation furnace body structure of boiler vehicle

Abstract

The multi-layer heat insulation furnace body structure comprises a coating layer, and the coating layer extends to the upper end of a compartment from the front end of the compartment and is of an L-shaped structure; the coating layer is used for collecting waste heat of exhaust gas of the boiler to the surface of the carriage for heat preservation; a side coil pipe is installed in the vertical section of the coating layer and tightly attached to the surface of the carriage, a top coil pipe is installed in the horizontal section of the coating layer and tightly attached to the surface of the carriage, and the side coil pipe is connected with the top coil pipe. A top pipe is installed at the end of the top coil pipe, and the opening direction of the top pipe is upward. By designing the coating layer and arranging the disc-shaped pipeline on the inner side of the coating layer, waste heat of waste gas of a boiler is recovered by the middle main body water tank and then is transmitted to the inner side of the coating layer, so that the front part and the top of the whole carriage have heat preservation and heating effects, and the whole carriage is not prone to falling off in the moving process or the static process. Accumulated snow on the top and the front portion of the compartment can be reduced, and heat preservation can be conducted on areas, where heat exchange is easy, of the compartment.

Description

Technical Field

[0001] The invention relates to the field of boiler cars, and in particular to a multi-layer heat insulation furnace body structure of a boiler car. Background Art

[0002] The boiler truck is a mobile device loaded on the chassis of a car. All configurations are fixed on a metal frame connected to the car frame. It can also be manufactured in a skid-mounted form according to user requirements. It usually includes a generator set, a burner, a water tank, a water pump, a boiler and other equipment. Generally, the boiler used for combustion heats the input water source to form water vapor spray to achieve the de-icing effect. This equipment is usually used in colder areas, mainly for thawing the target area. For example, the prior art with patent number CN109958090A discloses similar equipment.

[0003] In actual use, the insulation of the boiler body usually involves the influence of many aspects, such as the temperature of the environment and the choice of materials, etc. However, since the boiler is generally installed inside the car, only the insulation layer or the water inlet and outlet pipes and steam pipes of the boiler car are treated separately, which obviously cannot meet the insulation effect of the boiler in extremely cold weather, especially when driving in blizzard weather. Even if the driver starts the boiler preheating in advance, the heat of the boiler itself will be lost faster due to the snow on the top of the car and the airflow generated during driving. When arriving at the destination, it still takes a long time to wait for the boiler to heat up, resulting in reduced work efficiency and poor boiler temperature preservation effect. At the same time, the above-mentioned existing technology does not further utilize the waste heat of the exhaust gas generated by the boiler. Nowadays, green environmental protection is also a technical trend in this field, so there is a need to improve the existing technology. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a multi-layer thermal insulation furnace body structure for a boiler car, which mainly improves the thermal insulation effect of the boiler car when it is moving and stopped in the prior art, and solves the technical problem of not further utilizing the waste heat of the boiler's exhaust gas.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a multi-layer heat-insulating furnace structure of a boiler car, comprising a car, a boiler in the car for heating, an oil inlet assembly for supplying fuel to the boiler, a main water tank for injecting water into the boiler, a switch cabinet for controlling the oil inlet assembly and a water pump respectively, and a water pump for pumping out the water source in the main water tank, the boiler also comprises an inner coil, the end of the inner coil is connected to an air pressure detection assembly and a nozzle, the nozzle is used to spray out water vapor heated by the coil of the boiler, the top of the boiler is provided with an air outlet pipe, the air outlet pipe is used to discharge the exhaust gas in the boiler, and the characteristic is that it also comprises: a covering layer, the covering layer extends from the front end of the car To the upper end of the car, it is an L-shaped structure; the covering layer is used to collect the waste heat of the boiler's exhaust gas at the rear; a side coil is installed in the vertical section of the covering layer close to the surface of the car, and a top coil is installed in the horizontal section of the covering layer close to the surface of the car, and the side coil and the top coil are connected; a top pipe is installed at the end of the top coil, and the opening direction of the top pipe is upward; a lower water tank, the lower water tank is located at the lower part of the main water tank; the lower water tank is used to store the water source pumped into the boiler for heating, and recover the waste heat of the boiler's exhaust gas in the middle; an upper water tank, the upper water tank is located at the upper part of the main water tank; the upper water tank is used to filter the exhaust gas of the boiler.

[0007] Preferably, a U-shaped tube is provided inside the lower water tank, and one end of the U-shaped tube passes through the inner wall of the lower water tank and is connected to the air outlet pipe. A middle partition is installed on the top of the lower water tank, and a lower water inlet is provided on the side surface of the lower water tank.

[0008] Preferably, the upper water tank and the lower water tank are vertically spliced, and the other end of the U-shaped tube passes through the bottom of the middle partition to the interior of the upper water tank. An upper water inlet and a connecting pipe are provided on the top of the upper water tank. The interior of the upper water tank is used to store a water source for filtering the exhaust gas from the U-shaped tube; the connecting pipe is connected to the side coil.

[0009] Preferably, a first air pump is provided in the middle of the air outlet pipe, and the first air pump is used to extract the exhaust gas generated in the boiler; a second air pump is provided in the middle of the connecting pipe, and the second air pump is used to form a negative pressure inside the upper water tank.

[0010] Preferably, a pipe joint is installed at the junction of the connecting pipe and the side coil, and the pipe joint includes a through base and a threaded cover, wherein the threaded cover is located on the surface of the coating layer, and the threaded cover and the through base are sealed; the side coil is connected by the side surface of the through base.

[0011] Preferably, the water level inside the upper water tank is located at one-half to two-thirds of the height of the inner wall of the upper water tank; and the water level of the lower water tank is set at full load.

[0012] Preferably, the switch cabinet is electrically connected to the boiler, the first air pump, the second air pump, the oil inlet assembly and the water pump respectively; the bottom of the carriage is connected to the body, the side surface of the carriage is provided with a door, a sealing rubber ring is provided between the door and the carriage, and a pipe extension cover is installed on the surface of the door.

[0013] Preferably, the inner wall of the carriage is provided with a vacuum interlayer, the inner wall of the carriage is provided with a negative pressure extraction point, and the coating layer is located outside the vacuum interlayer.

[0014] Preferably, the negative pressure extraction point is equipped with an air extraction component, the air extraction component includes an air extraction pump, and the bottom side of the air extraction component is provided with an air intake component, and the air intake component includes an electromagnetic valve.

[0015] Preferably, the switch cabinet is also electrically connected to the air extraction component and the air intake component, and a temperature sensor is provided on the surface of the switch cabinet.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention designs a covering layer and provides a disc-shaped pipe on the inner side of the covering layer. The waste heat of the boiler exhaust gas is recovered by the middle main body water tank and then transmitted to the inner side of the covering layer, so that the front and top of the entire car body have the effect of insulation and heating. Whether the car body is moving or stationary, it can reduce the accumulation of snow on the top and front of the car body, and insulate the areas of the car body that are easy to exchange heat. The waste heat recovery of the exhaust gas can also reduce the thermal pollution caused to the environment, making the exhaust gas emissions more environmentally friendly.

[0018] The present invention is designed with a vacuum interlayer structure, which, by cooperating with the upper covering layer, can, under the effect of external insulation, stably block the transmission of ambient temperature by the dynamic negative pressure of the vacuum interlayer, thereby reducing the temperature consumption inside the carriage and avoiding a large loss of boiler temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the coating layer structure of the present invention;

[0022] Figure 3 is a front view of the side coil structure of the present invention;

[0023] Figure 4 is a top view of the top coil structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the pipe joint structure of the present invention;

[0025] Figure 6 is a top view of the carriage structure of the present invention;

[0026] In the figure: 1, carriage; 101, boiler; 102, oil inlet assembly; 103, water pump; 104, switch cabinet; 105, inner coil; 106, air pressure detection assembly; 107, nozzle; 108, air outlet pipe; 109, first air pump; 2, main water tank; 3, coating layer; 301, side coil; 302, top coil; 303, top pipe; 4, lower water tank; 401, U-shaped pipe; 402 , middle partition; 403, lower water inlet; 404, one-way valve; 5, upper water tank; 501, upper water inlet; 502, connecting pipe; 503, second air pump; 6, pipe joint; 601, through base; 602, threaded cover; 7, vehicle body; 701, vehicle door; 702, pipe extension cover; 8, vacuum interlayer; 801, negative pressure extraction point; 802, exhaust assembly; 803, air intake assembly. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] Example 1

[0029] like Figure 1-6 As shown, the present invention provides a multi-layer thermal insulation furnace structure for a boiler car, such as Figure 1 and 2 As shown, a boiler 101, an oil inlet assembly 102, a main water tank 2, a water pump 103 and a switch cabinet 104 are placed inside the carriage 1. The oil inlet assembly 102 includes an oil pump, an oil tank and an ignition device. The boiler 101 mainly heats the water source of the main water tank 2 to form water vapor in the pipeline. The volume of the water vapor expands and the pressure increases, so that it is sprayed out from the nozzle 107 under the regulation and pressure detection of the air pressure detection assembly 106; the air pressure detection assembly 106 can also be installed with other pipelines for use, which is a conventional boiler car use process; the exhaust gas generated by the boiler 101 is generally discharged directly to the outside through the exhaust pipe 108, and the exhaust gas emission temperature of the boiler car is generally 120-250 degrees; the side wall of the carriage 1 is also provided with a car door 701, and the car door 701 can be a rolling door or a swing door.

[0030] In order to increase the waste heat recovery of the exhaust gas emission temperature of the boiler 101, the present invention designs a path according to the circulation of the exhaust gas. In the first step, the exhaust gas passes through the U-tube 401 of the lower water tank 4, so that the hotter exhaust gas first exchanges heat with the water source inside the lower water tank 4. Since the water source inside the lower water tank 4 is mainly pumped into the boiler 101 by the water pump 103, the heated water source will also preheat the pipeline between the lower water tank 4 and the boiler 101, so that the pipeline connection part of the boiler 101 forms heat radiation, reducing the temperature loss of the boiler 101. The water pump 103 and the oil inlet assembly 102 placed on the left and right sides of the boiler 101 can also increase the heat on the surface of the boiler 101 when it is started, so that the boiler 101 is surrounded by a heat preservation effect.

[0031] The exhaust gas discharged from the U-shaped tube 401 of the lower water tank 4 is not treated, and carbon deposition is likely to form in the multiple curved pipes. Therefore, an upper water tank 5 is provided. When the exhaust gas is discharged from the one-way valve 404 of the U-shaped tube 401, it will enter the water source inside the upper water tank 5, and the gas will be mixed with the water source before being discharged from the connecting pipe 502; the connecting pipe 502 is equipped with a second air pump 503, and the upper water tank 5 will form a negative pressure when drawing air outward, and the combustion products in the exhaust gas will be adsorbed by the water, and the gas It is realized that due to the negative pressure extraction, since the exhaust gas directly exchanges heat with the water source inside the upper water tank 5, the upper water tank 5 can also be used as an insulation box for the lower water tank 4, thereby keeping the lower water tank 4 warm; if necessary, the upper water tank 5 can also increase the water circulation system, for example, other water pipes are connected to the upper water inlet 501, and a drain port is provided on the upper water tank 5, so that the internal water source is repeatedly circulated to reduce the carbon content in the exhaust gas, and the circulating water source can also produce a heat exchange effect due to the direct contact with the exhaust gas, thereby reducing the temperature of the exhaust gas.

[0032] The exhaust gas that has been preliminarily treated can be discharged to the inner side of the coating layer 3 due to the lower temperature, so as to avoid the surface of the carriage 1 from being broken due to thermal expansion and contraction caused by the large temperature difference between the coating layer 3 and other parts of the carriage 1. The exhaust gas temperature at this time is usually around 40-60 degrees, and it mainly enters the side coil 301 through the connecting pipe 502, and then continuously enters the top coil 302 from the side coil 301, and then is discharged upward from the top pipe 303. Because the cab is mainly at the front end of the carriage 1, the boiler 101 is in a preheated state, and the carriage 1 is mainly exposed to airflow at the front end and the top during the moving process, especially the top of the carriage 1 is prone to snow accumulation, so the side coil 301 can generate heat exchange with the air near the cab until it rises to the top coil 302, and can also exchange heat with the snow on the top, so that a large amount of snow cannot be retained on the top. Especially when the boiler car is stationary, the boiler 101 is not in a low-efficiency preheating state, and its own heating efficiency is increased. The exhaust gas entering the covering layer 3 is generally 60-80 degrees, which can melt a large amount of snow on the top of the carriage 1.

[0033] The designed pipe joint 6 is convenient for the user to inspect the connection part of the connecting pipe 502 and the side coil 301. When a blockage occurs in the pipe, the user can remove the threaded cover 602, and after partially blocking the connecting pipe 502, use the suction equipment to extract the internal blockage from the side coil 301 and the top pipe 303 respectively; it is also possible to block part of the side coil 301, connect the connecting pipe 502 to other pipeline equipment, and discharge the pre-treated exhaust gas from the front of the car 1.

[0034] In the working process, when the carriage 1 is in a moving state, the boiler 101 can be started when the carriage 1 is about to reach the destination, and the switch cabinet 104 controls the electrically connected equipment such as the water pump 103 and the oil pump to realize the preheating of the carriage 1; at this time, the exhaust gas of the boiler 101 will pass through the main water tank 2 to the inside of the coating layer 3, so that the pipeline will be preheated, and at the same time, the water pump 103 only pumps out a small amount of water, and the nozzle 107 can be connected to the lower water injection port 403 to preheat the lower water tank 4; the upper water injection port 501 is in a sealed state, and water sources are left in the upper water tank 5 and the lower water tank 4, and the water source of the upper water tank 5 is only one-half or less, so that the overall equipment is self-circulated and preheated with high efficiency, and the heat exchange consumption between the front and top of the surface of the carriage 1 and the environment is reduced during the movement;

[0035] When the carriage 1 is in a stopped state, the interior of the carriage 1 is checked and is in an operable state, the door 701 is closed, the pipe extension cover 702 is removed, and the nozzle 107 is extended from the pipe extension cover 702, so that the nozzle 107 can be used in a closed state inside the carriage 1; at this time, the exhaust gas will still pass through the lower water tank 4 and the upper water tank 5 to the inside of the coating layer 3, forming a residual heat insulation effect, reducing snow accumulation and heat exchange inside the carriage 1, while increasing the utilization of the residual heat of the exhaust gas, and also preventing the hot exhaust gas from being directly discharged into the environment to form thermal pollution.

[0036] Example 2

[0037] The difference from Example 1 is that a vacuum interlayer 8 is provided on the inner wall of the compartment 1 , a negative pressure extraction point 801 is provided on the inner wall of the compartment 1 , and the covering layer 3 is located outside the vacuum interlayer 8 .

[0038] The negative pressure extraction point 801 is equipped with an air extraction component 802, which includes an air extraction pump. The bottom side of the air extraction component 802 is provided with an air intake component 803, which includes an electromagnetic valve.

[0039] The switch cabinet 104 is also electrically connected to the air extraction component 802 and the air intake component 803 , and a temperature sensor is provided on the surface of the switch cabinet 104 .

[0040] Specifically, the compartment 1 is further provided with a vacuum interlayer 8. Since the compartment 1 is mainly made of metal materials and the negative pressure strength that the vacuum interlayer 8 of the compartment 1 can bear is relatively low, the air extraction component 802 can extract the air inside the vacuum interlayer 8 to form a certain degree of negative pressure vacuum. When the interior of the compartment 1 is preheated, the vacuum interlayer 8 will also be affected to a certain extent. The pressure of the vacuum interlayer 8 can be maintained in cooperation with the air intake component 803 according to the pressure detection air of the air extraction component 802, so as to increase the temperature insulation inside and outside the compartment 1, so that the compartment 1 has a certain degree of temperature insulation effect from the front, back and top;

[0041] When necessary, if an internal fire occurs, such as due to aging and short circuit of the switch cabinet 104, the electromagnetic valve of the air intake component 803 can be directly opened to allow the smoke generated by the internal combustion to directly enter the vacuum interlayer 8 due to the negative pressure from the exhaust component 802, thereby increasing the circulation of air inside and outside and giving the staff space for emergency treatment of the target components.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-layer heat-insulating furnace structure of a boiler car, comprising a car (1), a boiler (101) in the car (1) for heating, an oil inlet assembly (102) for supplying fuel to the boiler (101), a main water tank (2) for injecting water into the boiler (101), a water pump (103) for pumping out water from the main water tank (2), and a switch cabinet (104) for respectively controlling the oil inlet assembly (102) and the water pump (103), wherein the boiler (101) further comprises an inner coil (105), an end of the inner coil (105) is connected to an air pressure detection assembly (106) and a nozzle (107), the nozzle (107) is used to spray out water vapor heated by the inner coil (105) of the boiler (101), an air outlet pipe (108) is provided at the top of the boiler (101), and the air outlet pipe (108) is used to discharge exhaust gas in the boiler (101), characterized in that: Also includes: A covering layer (3), the covering layer (3) extending from the front end of the carriage (1) to the upper end of the carriage (1), presenting an L-shaped structure; the covering layer (3) is used to collect waste heat from the exhaust gas of the boiler (101) to the surface of the carriage (1) for heat preservation; a side coil (301) is installed in a vertical section of the covering layer (3) in close contact with the surface of the carriage (1); a top coil (302) is installed in a horizontal section of the covering layer (3) in close contact with the surface of the carriage (1), and the side coil (301) and the top coil (302) are connected; a top pipe (303) is installed at the end of the top coil (302), and the opening direction of the top pipe (303) is upward. A lower water tank (4), the lower water tank (4) being located at the lower part of the main water tank (2); the lower water tank (4) being used to store water pumped into the boiler (101) for heating, and to recover waste heat from the exhaust gas of the boiler (101) to heat the internal water source; An upper water tank (5), the upper water tank (5) is located at the upper part of the main water tank (2); the upper water tank (5) is used to filter the exhaust gas of the boiler (101).

2. The multi-layer thermal insulation furnace structure of a boiler car according to claim 1 is characterized in that: A U-shaped tube (401) is provided inside the lower water box (4), and one end of the U-shaped tube (401) penetrates the inner wall of the lower water box (4) and is connected to the air outlet pipe (108). A middle partition plate (402) is installed on the top of the lower water box (4), and a lower water inlet (403) is provided on the side surface of the lower water box (4).

3. The multi-layer thermal insulation furnace structure of a boiler car according to claim 2 is characterized in that: The upper water tank (5) and the lower water tank (4) are vertically spliced, the other end of the U-shaped tube (401) passes through the bottom of the middle partition (402) to the interior of the upper water tank (5), and a one-way valve (404) is installed at the other end of the U-shaped tube (401). The top of the upper water tank (5) is provided with an upper water inlet (501) and a connecting pipe (502), and the interior of the upper water tank (5) is used to store a water source for filtering the exhaust gas of the U-shaped tube (401); the connecting pipe (502) is connected to the side coil (301).

4. The multi-layer thermal insulation furnace structure of a boiler car according to claim 3 is characterized in that: A first air pump (109) is provided in the middle of the air outlet pipe (108), and the first air pump (109) is used to extract the exhaust gas generated in the boiler (101); a second air pump (503) is provided in the middle of the connecting pipe (502), and the second air pump (503) is used to form a negative pressure inside the upper water tank (5).

5. The multi-layer thermal insulation furnace structure of a boiler car according to claim 4, characterized in that: A pipe joint (6) is installed at the junction of the connecting pipe (502) and the side coil (301), and the pipe joint (6) comprises a through-base (601) and a threaded cover (602), wherein the threaded cover (602) is located on the surface of the coating layer (3), and the threaded cover (602) and the through-base (601) are sealed and connected; the side coil (301) is connected via the side surface of the through-base (601).

6. The multi-layer thermal insulation furnace structure of a boiler car according to claim 4, characterized in that: The water level inside the upper water tank (5) is located at one-half to two-thirds of the height of the inner wall of the upper water tank (5); and the water level of the lower water tank (4) is set to be fully loaded.

7. The multi-layer thermal insulation furnace structure of a boiler car according to claim 6, characterized in that: The switch cabinet (104) is electrically connected to the boiler (101), the first air pump (109), the second air pump (503), the oil inlet assembly (102) and the water pump (103) respectively; the bottom of the carriage (1) is connected to the body (7); the side surface of the carriage (1) is provided with a door (701); a sealing rubber ring is provided between the door (701) and the carriage (1); and a pipe extension cover (702) is installed on the surface of the door (701).

8. The multi-layer thermal insulation furnace structure of a boiler car according to claim 7, characterized in that: The inner wall of the carriage (1) is provided with a vacuum interlayer (8), the inner wall of the carriage (1) is provided with a negative pressure extraction point (801), and the coating layer (3) is located outside the vacuum interlayer (8).

9. The multi-layer thermal insulation furnace structure of a boiler car according to claim 8, characterized in that: The negative pressure extraction point (801) is equipped with an air extraction component (802), and the air extraction component (802) includes an air extraction pump. The bottom side of the air extraction component (802) is provided with an air intake component (803), and the air intake component (803) includes an electromagnetic valve.

10. The multi-layer thermal insulation furnace structure of a boiler car according to claim 9, characterized in that: The switch cabinet (104) is also electrically connected to the air extraction component (802) and the air intake component (803), and a temperature sensor is provided on the surface of the switch cabinet (104).

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