CN205561530U - Tunnel cave kiln hood sealing device - Google Patents

Abstract

The utility model provides a sealed vehicle bottom is constituteed that tunnel cave kiln hood sealing device, by twice over -and -under type sealing door and a drive. Sealed vehicle bottom puts down the 2nd sealing door after entering load kiln car top in the tunnel cave, and sealed tunnel cave kiln hood rises a sealing door, withdraws from sealed vehicle bottom, pushes up into kiln hood seal section again with next load kiln car, with previous load kiln car butt joint, then puts down a sealing door, rises the 2nd sealing door again, forms the task of a sealing door and the common in succession sealed kiln hood of power vehicle bottom, begins work in turn then, reaches the function of the strict sealed tunnel cave kiln hood of overall process.

Description

A tunnel kiln kiln head sealing device

technical field

The utility model relates to a sealing device, in particular to a kiln head sealing device of a tunnel kiln.

Background technique

Tunnel kilns (including tunnel kilns and car bottom furnaces) are produced by loading products on kiln cars and completing the production of products through preheating, firing and other processes. Important area. The fields involving the use of tunnel kilns include ceramics, bricks and tiles, refractory materials, direct reduction iron making and other industries. There are no less than 1 million large and small tunnel kilns across the country. The energy-saving renovation of tunnel kilns will become an important energy strategy in my country.

Since the interior of the kiln needs to maintain temperature stability, it is necessary to prevent the outside cold air from entering and taking away the heat. No matter what kind of tunnel kiln, it is not strictly sealed, and it is open when the kiln car enters and exits the tunnel kiln. Kiln door. The existing technology generally adopts a single kiln (furnace) door. After opening, the kiln car loaded with materials is pushed into the kiln and then closed. When the next batch of processes is carried out, the kiln (furnace) door needs to be opened again, which is easy to cause The loss of energy inside the kiln (furnace), resulting in energy waste.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a kiln head sealing device for an energy-saving tunnel kiln, which can maintain the stability of the atmosphere in the kiln while saving energy.

The purpose of this utility model is achieved through the following technical solutions.

A sealing device for the kiln head of a tunnel kiln, comprising a kiln head sealing section, a first sealing door, a second sealing door and a sealing car bottom, wherein the first sealing door and the second sealing door are lift-type sealing doors; the sealing car bottom and the power The device is connected and can move on the track; the first and second sealing doors work alternately to realize the sealing of the tunnel kiln.

In addition, the sealing device of the tunnel kiln type kiln according to the embodiment of the present invention can also have the following additional technical features:

Further, the kiln head sealing section includes a side wall and a top wall. The side wall and the top wall can be made of double-layer steel plate composite lightweight refractory material, so as to improve the heat preservation effect.

Further, thin plates are provided on both sides of the first and/or second airtight door to facilitate positioning when the airtight door is raised and lowered, and when the kiln car is advanced and the bottom of the airtight door is raised to reduce the kiln pressure. Exchange of internal air with external air.

Further, the side of the platform that seals the bottom of the vehicle is covered with a silicone rubber sheet to achieve a better sealing effect.

Further, the power device is a hydraulic device, a pneumatic device or a stepping machine, such as a hydraulic jack, an air cylinder, or a stepping motor. The bottom of the sealed car is driven by the power device, and the step-by-step propulsion can be one step for one kiln car, or several steps for one kiln car to complete the propulsion.

Further, the first airtight door and the second airtight door are arranged in parallel, and the lift type airtight door is driven by a lift motor.

Further, a tunnel-type kiln platform is arranged in front of the sealing device for carrying a new load kiln car.

The working principle of the utility model is: use two sealing doors to alternately seal the kiln tunnel of the tunnel kiln, and use a power device (such as a hydraulic roof) to run a sealed car bottom, so that the kiln body can be kept in a sealed state when the kiln car enters the kiln tunnel , or in the working state of the tunnel kiln, a kiln car can be gradually jacked up step by step without changing its sealing state.

The specific working process is: after sealing the bottom of the load kiln car and pushing it into the tunnel kiln, lower the first sealing door, seal the kiln head of the tunnel kiln, raise the second sealing door, withdraw from the bottom of the sealing car, and put the next load The kiln car then pushes into the sealing section of the kiln head, docks with the previous load kiln car, then lowers the second sealing door, and then raises the first sealing door to form the second sealing door and the bottom of the sealing car to continuously seal the kiln The task of the head is repeated and alternated to achieve the function of strictly sealing the head of the tunnel kiln in the whole process.

The beneficial effects of the utility model are:

1. The kiln head is equipped with two airtight doors, and the kiln body is basically airtight, which prevents frequent heat exchange between the outside air and the air inside the kiln, so the loss of heat and energy is small.

2. For the tunnel kiln operated under negative pressure, it can achieve good isolation from the outside world, and there will be no influx of a large amount of cold air, thus achieving a relatively stable atmosphere in the kiln. The sealing device of the present application can be well applied to the reduction ironmaking process.

Description of drawings

Figure 1 shows the initial sealing state of the kiln head of the tunnel kiln.

Figure 2 shows the second sealing state of the kiln head of the tunnel kiln.

Fig. 3 is the third sealing state of the kiln head of the tunnel kiln.

Figure 4 shows the fourth sealing state of the kiln head of the tunnel kiln.

In the figure, 1. Loaded kiln car ①, 2. Sealed car bottom, 3. First sealed door, 4. Second sealed door, 5. Tunnel kiln platform, 6. Hydraulic jack, 7. Hydraulic jacking rod, 8. Load kiln car ②, 9. Tunnel kiln body.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described. The following description takes a tunnel kiln as an example, which does not affect those skilled in the art from applying the sealing device to car bottom furnaces and other similar devices.

Referring to Fig. 1, it shows a tunnel kiln kiln head sealing device, the sealing device includes a first sealing door 3, a second sealing door 4 and a sealing bottom 2, and the two sealing doors can be operated in a lifting manner, for example, by a lifting motor Driven, the sealed bottom 2 is driven by the hydraulic roof 6 to move on the track. The hydraulic jack can be replaced by a cylinder, a stepper, etc. Fig. 1 shows the relative position of each component in its initial state, and the tunnel kiln body 9 is sealed by the load kiln car 1 and the first sealing door 3 .

The sealing device also includes a side wall and a top wall (not shown in the figure), which, together with the two sealed doors and the sealed bottom of the car, realize the sealing of the tunnel kiln. The side wall and the top wall can be made of double-layer steel plate composite lightweight refractory material, so as to improve the heat preservation effect. Those skilled in the art should understand that other side wall forms, such as arched walls, can also meet the requirements of the present invention. Both sides of the first airtight door 3 and the second airtight door 4 are provided with thin plates (not shown in the figure), the width of which is equivalent to the thickness of the side walls, and the thickness of the thin plates is 0.5-4 mm, which is convenient for positioning when the airtight doors are raised and lowered , and when the kiln car is advanced, the bottom of the sealed car is withdrawn and the sealed door is raised, the heat exchange between the air in the kiln and the outside air is reduced. To achieve a better sealing effect, the side of the platform of the sealed vehicle bottom 2 is covered with a silicon rubber sheet.

The process of the alternate work of the sealing door is that when the bottom of the sealing car pushes the load kiln car 1 into the tunnel kiln, the sealing door 3 is immediately put down, and the load kiln car 1 is in close contact with the first sealing door 3, which separates the tunnel kiln from the sealing section and Seal the tunnel kiln; when the sealed door 3 works normally, as shown in Figure 2, lift the second sealed door 4, pull the hydraulic ejector rod 7 through the hydraulic jack 6 to return the sealed car bottom 2 to the standby state; the next step is shown in the figure 3, another loaded kiln car 8 is pushed onto the tunnel kiln platform 5, ready to enter the kiln, for example, the loaded kiln car can be transported to the tunnel kiln platform 5 by a ferry car; Push the top 6 to push the bottom 2 of the sealing car, and then push the load kiln car 8 to push it into the sealing section at one time until it docks with the first load kiln car 1 that has entered the tunnel kiln. Then put down the second airtight door 4, and then mention the first airtight door 3, and seal the tunnel kiln body 9 by the second airtight door 4 and the bottom 2 of the sealed vehicle. After the sealed door worked normally, continue to promote the bottom of the sealed car 2 until the second load kiln car 8 is pushed in the tunnel kiln kiln body 9. Put down airtight door 3 again this moment, mention airtight door 4, get back to the state shown in Figure 1 again. Such repeated operation of the system can ensure that the kiln head of the tunnel kiln is sealed around the clock.

The descriptions of the above embodiments are only used to help understand the method and core idea of the solution. It should be pointed out that without departing from the principle of the solution, some improvements can be made to the solution, and these improvements also fall within the protection scope of the claims of the solution.

Claims (9)

1. A tunnel kiln kiln head sealing device, said sealing device comprising a kiln head sealing section, a first sealing door, a second sealing door and a sealing car bottom, wherein the first sealing door and the second sealing door are lifting type sealing doors , respectively set at both ends of the sealing section of the kiln head; the bottom of the sealing car is connected with the power device and can move on the track; the first and second sealing doors work alternately to realize the sealing of the tunnel kiln. 2. The sealing device according to claim 1, characterized in that: the kiln head sealing section includes side walls and top walls, and the side walls and top walls are made of double-layer steel plate composite lightweight refractory materials. 3. The sealing device according to claim 1, characterized in that thin plates are arranged on both sides of the first and/or second sealing door. 4. The sealing device according to claim 1, characterized in that: the side of the platform of the sealed vehicle bottom is covered with a silicon rubber sheet. 5. The sealing device according to claim 1, wherein the power device is a hydraulic device, a pneumatic device or a stepper. 6. The sealing device according to claim 1, characterized in that: the first airtight door and the second airtight door are arranged in parallel. 7. The sealing device according to claim 1, characterized in that: the first and second sealing doors are driven by lifting motors. 8. The sealing device according to claim 1, characterized in that: a tunnel kiln platform is arranged in front of the sealing device. 9. The sealing device according to claim 1, characterized in that: the upper surface of the sealed car bottom is flush with the upper surface of the loaded kiln car.