A self-adjusting sealing device

Abstract

A self-adjusting sealing device is arranged between the top of an air box and the bottom of a trolley of a sintering device, and comprises: an installation box, wherein a spring fixing plate and a sealing strip fixing plate are arranged in the installation box, and the sealing strip fixing plate is located above the spring fixing plate; a sealing strip arranged on the sealing strip fixing plate; a supporting spring arranged on the spring fixing plate, the sealing strip fixing plate is supported by the supporting spring, and the supporting spring jacks up the sealing strip fixing plate; a first limiting block fixedly connected with the installation box; a second limiting block arranged on the sealing strip fixing plate, the first limiting block and the second limiting block are arranged adjacent to each other in the front-back direction, and the first limiting block is located behind the second limiting block. The sealing device of the invention can automatically adapt to the gap between the sealing strip and the bottom of the trolley, can ensure good sealing between the sealing strip and the bottom of the trolley, thereby improving the sealing effect and reducing air leakage.

Description

Technical Field

[0001] The present invention belongs to the technical field of metallurgical equipment, and particularly relates to a sealing device used for sealing the gap between the lower part of a trolley and an air box on sintering equipment such as a sintering machine or a cooling machine. Background Art

[0002] The blast ring cooler and the belt cooler are important equipment in the sintering production process, and are used for cooling the sintered ore material roasted by the sintering machine and crushed by a single roll crusher. The overall structure of the ring cooler is circular, and the overall structure of the belt cooler is linear. Taking the ring cooler as an example, the high-temperature sintered ore material is put into the trolley, and the trolley runs uniformly on the circular track of the ring cooler. At the same time, the blower blows air upward from below the ring cooler through the air box, and the air enters the trolley through the holes on the bottom plate of the trolley to cool the ore material in the trolley. After the trolley makes a round trip on the ring cooler and completes the cooling of the sintered ore, the cooled ore material is unloaded at the unloading area of the ring cooler. At present, the blast cooling is basically adopted for both the ring cooler and the belt cooler, and the utilization efficiency of the air sent into the air box by the blower directly affects the cooling efficiency of the cooling equipment. In order to improve the utilization efficiency of the cold air, it is required that the gap between the bottom of the trolley and the air box be effectively sealed to prevent the air from leaking out through the gap between the two.

[0003] A static friction plate made of graphite or graphite alloy is installed on the air box, and a dynamic friction plate corresponding to the static friction plate is arranged at the bottom of the trolley. Sealing the gap between the trolley and the air box by the upper and lower friction plates in close contact with each other is a sealing structure widely used in recent years. Since the graphite material has lubricity, it can play a lubricating role between the mutually contacting friction plates to ensure the sealing effect. However, during the operation of the equipment, the trolley is always moving, and how to ensure that the dynamic and static sealing plates still maintain good sealing during the movement of the trolley is an urgent problem to be solved by each manufacturer. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealing device that can adaptively adjust the sealing height and has a good sealing effect.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A self-adjusting sealing device is arranged between the top of the air box and the bottom of the trolley of a sintering device, and includes: an installation box, in which a spring fixing plate and a sealing strip fixing plate are arranged, and the sealing strip fixing plate is located above the spring fixing plate; a sealing strip arranged on the sealing strip fixing plate; a support spring arranged on the spring fixing plate, the sealing strip fixing plate is supported by the support spring, and the support spring jacks up the sealing strip fixing plate; a first limiting block fixedly connected to the installation box; a second limiting block arranged on the sealing strip fixing plate, the first limiting block and the second limiting block are arranged adjacent to each other in the front-rear direction, and the first limiting block is located behind the second limiting block.

[0007] More specifically, the first limiting block is arranged on the spring fixing plate.

[0008] Preferably, the first limiting block and the second limiting block are angular blocks that cooperate with each other.

[0009] More specifically, the height of the first limiting block and the height of the second limiting block are both smaller than the distance between the sealing strip fixing plate and the spring fixing plate.

[0010] More specifically, the distance between the first limiting block and the sealing strip fixing plate is smaller than the distance between the second limiting block and the spring fixing plate.

[0011] More specifically, a pair of support springs are arranged on the spring fixing plate, the support springs are located at both ends of the spring fixing plate, and the first limiting block and the second limiting block are located in the middle of the spring fixing plate.

[0012] Preferably, the end edge of the sealing strip is rounded.

[0013] Preferably, a sealing gasket is arranged on the side wall and / or the end face of the sealing strip fixing plate.

[0014] More specifically, the end of the sealing strip is stepped.

[0015] More specifically, a spring seat and an adjusting screw rod penetrating through the spring fixing plate are arranged on the spring fixing plate, the support spring is arranged on the spring seat, and the top of the adjusting screw rod passes through the spring fixing plate and is connected to the spring seat.

[0016] As can be seen from the above technical solutions, the sealing device of the present invention can be used between the top of the air box and the bottom of the trolley of sintering equipment such as annular cooler, belt cooler, sintering machine, etc. By adopting a sealing strip that can move up and down, under the adjustment of the support spring, the sealing strip can not only be finely adjusted in the height direction relative to the sealing seat, but also automatically adapt to the height gap that needs to be supplemented due to wear of the sealing member or installation error under the action of elastic force. For positions with inconsistent heights caused by wear in use or installation error, it can ensure that the sealing strip can maintain good contact with the bottom of the trolley or the sealing slideway at the bottom of the trolley. Moreover, under the limiting action of the limiting block, the sealing strip can be prevented from shifting due to the movement of the trolley, which affects the sealing effect, so that the air in the air box cannot leak out, reducing air leakage and improving the sealing effect. In addition, it can also reduce the wear of the sealing strip, extend its service life, and reduce the later maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention.

[0018] Figure 2 It is a front view of Embodiment 1 of the present invention.

[0019] Figure 3 It is a side view of Embodiment 1 of the present invention.

[0020] Figure 4 It is a top view of Embodiment 1 of the present invention.

[0021] Figure 5 It is a schematic structural diagram of Embodiment 1 of the present invention from another angle.

[0022] Figure 6 It is Figure 5 a partial enlarged view of part A in

[0023] Figure 7 It is Figure 5 a partial enlarged view of part B in

[0024] Figure 8 It is a schematic structural diagram of Embodiment 2 of the present invention.

[0025] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. SPECIFIC EMBODIMENTS

[0026] The present invention will be described in detail below with reference to the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the drawings showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention here. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.

[0027] Example 1

[0028] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown in the figure, the self-adjusting sealing device of this embodiment includes an installation box 1, a sealing strip fixing plate 2, an installation box cover plate 3, a support spring 4, a sealing strip 5, a spring fixing plate 6, a first limit block 7 and a second limit block 8. The installation box 1 is fixedly installed on the top of the air box. The vertical section of the installation box 1 in this embodiment is L-shaped. The installation box 1 and the installation box cover plate 3 together form an installation box body of a sealing device. The installation box cover plate 3 can play a role in dust prevention and aesthetics, and is also convenient for maintenance. The spring fixing plate 6 is horizontally arranged in the installation box 1. The spring fixing plate 6 in this embodiment is as long as the installation box 1. The support spring 4 is arranged on the spring fixing plate 6. The support spring 4 is used to support the sealing strip fixing plate 2 above the spring fixing plate 6. The top of the support spring 4 abuts against the sealing strip fixing plate 2, and the bottom abuts against the spring fixing plate 6. In order to facilitate the installation and positioning of the support spring, a spring seat 6a can be arranged on the spring fixing plate 6, and the support spring 4 is arranged on the spring seat 6a. The spring seat can also prevent the support spring 4 from tilting. The sealing strip fixing plate 2 in this embodiment is supported by a pair of support springs 4 at both ends in its length direction. The support spring 4 provides an upward pushing force for the sealing strip fixing plate 2. The sealing strip 5 is arranged on the sealing strip fixing plate 2. Under the elastic force of the support spring 4, the sealing strip 5 (sealing strip fixing plate 2) always has a tendency to move upward, so as to always keep in contact with the dynamic friction plate 100 installed at the bottom of the trolley, realizing effective sealing. The sealing strip 5 can be made of a high-temperature resistant alloy material, such as a graphite alloy strip, a graphite self-lubricating wear-resistant strip, etc. The cross-sectional shape of the sealing strip 5 is rectangular or square. The sealing strip 5 extends along the direction parallel to the moving path of the trolley. In order to better achieve profile following sealing, the length of the sealing strip 5 is preferably 0.8 to 1 meter.

[0029] The first limiting block 7 and the second limiting block 8 are angular blocks that cooperate with each other (in other embodiments, the first limiting block and the second limiting block may also be blocks with a square cross-section arranged adjacent to each other front and back). The two limiting blocks adopt the structure of angular blocks, and their mutual cooperation can form multi-directional limitation, ensuring that the sealing strip has no displacement in the front, back, left, and right directions and can only move up and down to achieve self-adjusting sealing. The first limiting block 7 is arranged on the spring fixing plate 6, and it is fixedly connected to the installation box through the spring fixing plate 6; the second limiting block 8 is arranged on the sealing strip fixing plate 2, and the first limiting block 7 and the second limiting block 8 are engaged with each other and are located between the two support springs 4. The first limiting block 7 and the second limiting block 8 are used to limit the displacement of the sealing strip fixing plate 2 (sealing strip 5) in the moving direction of the trolley. The limiting assembly composed of the first limiting block 7 and the second limiting block 8 is preferably arranged at the middle position in the length direction of the spring fixing plate 6 and is located between the two support springs 4. Relative to the moving direction of the trolley ( Figure 2In the direction indicated by the arrow in the figure, the first limiting block 7 is located behind the second limiting block 8 (that is, when the trolley moves, it first passes through the second limiting block 8 and then passes through the first limiting block 7). Therefore, when the dynamic friction plate 100 moves with the trolley, even if it hits the sealing strip 5, due to the limiting effect of the first limiting block 7 on the second limiting block 8, the second limiting block 8 is blocked by the first limiting block 7, and the sealing strip 5 cannot move backward, preventing the sealing strip 5 from displacing in the front-back and / or left-right directions due to the impact of the dynamic friction plate 100. In addition, the shapes of the first limiting block 7 and the second limiting block 8 and the structure of their mutual engagement in this embodiment can also limit the displacement of the sealing strip 5 in the width direction. By limiting the sealing strip in the length and width directions by the two limiting blocks, it is ensured that the sealing strip will not shift in the front-back, left-right and other directions during the operation of the equipment, thereby maintaining a good sealing state between the sealing strip 5 and the dynamic friction plate 100. More specifically, the heights of both the first limiting block 7 and the second limiting block 8 are less than the distance between the sealing strip fixing plate 2 and the spring fixing plate 6. Among them, the distance between the top surface of the first limiting block 7 and the bottom surface of the sealing strip fixing plate 2 is less than the distance between the bottom surface of the second limiting block 8 and the top surface of the spring fixing plate 6. There are gaps between the top of the first limiting block 7 and the sealing strip fixing plate 2 and between the bottom of the second limiting block 8 and the spring fixing plate 6. Thus, the sealing strip 5 (sealing strip fixing plate 2) can adapt to the downward displacement generated when the trolley moves up and down. The first limiting block 7 and / or the second limiting block 8 can also play a role in supporting and limiting the sealing strip 5 to prevent it from moving downward too much and causing sealing failure. In this embodiment, the distance between the bottom surface of the second limiting block 8 and the top surface of the spring fixing plate 6 is greater than the distance between the top surface of the first limiting block 7 and the bottom surface of the sealing strip fixing plate 2. Since the inside of the air box of the sintering machine or the cooling machine is an environment with a large amount of dust, ore particles may fall into the sealing box and accumulate on the surface of the spring fixing plate 6. The relatively large distance between the bottom surface of the second limiting block 8 and the top surface of the spring fixing plate 6 can provide space for the deposition of ore particles and provide a space margin for the second limiting block 8 to move downward with the sealing strip 5.

[0030] The dynamic friction plate is installed at the bottom of the trolley, and several dynamic friction plates are connected in sequence. During the process of the dynamic friction plate moving with the trolley, due to the up-and-down movement of the trolley, the end of the dynamic friction plate 100 may collide with the end of the sealing strip 5, resulting in damage to the end of the sealing strip 5 and affecting the sealing effect. Especially when the end of the dynamic friction plate 100 is an inclined surface, the tip of the inclined surface is more likely to cause damage to the end of the sealing strip 5. To improve this adverse situation, preferably, the edge of the end of the sealing strip 5 in this embodiment is rounded, as Figure 6As shown, at least the upper surface edge of the end of the sealing strip 5 is rounded. Thus, the impact between the moving friction plate 100 and the end of the sealing strip 5 during the movement can be mitigated, and damage to the sealing strip 5 can be avoided. Moreover, after the edge of the end of the sealing strip 5 is rounded, there is a slight gap at the connection of adjacent sealing strips 5 ( Figure 7 ), which can accommodate the deformation generated when the sealing strip is heated, provide a margin space for thermal expansion deformation, and ensure effective sealing. Further, the end of the sealing strip 5 is stepped, and the stepped portions at both ends of adjacent sealing strips cooperate with each other, and their connection forms a zigzag contact. The labyrinth structure at the connection of the sealing strips can prevent wind from leaking out from the connection between the sealing strips.

[0031] More preferably, in order to ensure no air leakage, a strip-shaped gasket 9 such as asbestos packing is provided on the side wall of the sealing strip fixing plate 2 ( Figure 3 ). The gasket 9 is in close contact with the inner wall of the installation box 1, which can prevent air from leaking out between the sealing strip fixing plate 2 and the inner wall of the sealing box 1. The gasket 9 can be provided on both side walls of the sealing strip fixing plate 2, or only on the side wall of the sealing strip fixing plate 2 close to the inner side of the air box. The gasket 9 can play the roles of sealing and heat insulation.

[0032] During use, the installation box 1 is fixedly installed on the top of the air box (side wall), the sealing strip 5 is installed on the sealing strip fixing plate 2, the sealing strip 5 is in contact with the moving friction plate 100 at the bottom of the trolley. After adjusting the support spring 4, the sealing strip 5 can freely lift under the elastic force of the adjusting spring 4 to adapt to the gap between the sealing strip and the bottom of the trolley. For positions with inconsistent heights caused by wear during use or installation errors, it can also ensure good sealing between the sealing strip and the bottom of the trolley, thereby improving the sealing effect and reducing air leakage.

[0033] Embodiment 2

[0034] As Figure 6 shown, the difference between this embodiment and Embodiment 1 is that an adjusting screw rod 10 penetrating the spring fixing plate 6 is provided on the spring fixing plate 6. The top of the adjusting screw rod 10 passes through the spring fixing plate 6 and is connected to the spring seat 6a. By rotating the adjusting screw rod 10, the height of the spring seat 6a can be adjusted, thereby adjusting the height of the support spring 4. In this way, when the sealing strip is worn, the height of the support spring can be adjusted to make up for it, extending the service life of the sealing strip and reducing costs. A locking nut (not labeled) can further be provided on the adjusting screw rod 10. After adjusting the adjusting screw rod 10, the adjusting screw rod 10 is tightened and fixed by the locking nut.

[0035] In this embodiment, grooves for installing the sealing gasket are provided on two side surfaces and one end surface (front or rear end surface) of the sealing gasket fixing plate. A strip-shaped self-lubricating sealing gasket 9 is installed in the grooves, so that there is no air leakage between the inner wall of the installation box and the spring fixing plate. In addition, the installation box of the self-adjusting sealing device of the present invention can be installed on the air box, and the sealing strip installed on the installation box contacts the friction plate at the bottom of the trolley for sealing; the installation box can also be installed at the bottom of the trolley, and the sealing strip installed on the installation box contacts the friction plate at the top of the side wall of the air box for sealing. The replacement of the installation position does not affect the realization of the sealing effect.

[0036] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A self-adjusting sealing device is arranged between the top of the wind box and the bottom of the trolley of the sintering equipment, and is characterized in that, Comprising: An installation box, in which a spring fixing plate and a sealing strip fixing plate are arranged, and the sealing strip fixing plate is located above the spring fixing plate; A sealing strip arranged on the sealing strip fixing plate; A support spring arranged on the spring fixing plate, the sealing strip fixing plate is supported by the support spring, and the support spring jacks up the sealing strip fixing plate; A first limiting block fixedly connected to the installation box; A second limiting block arranged on the sealing strip fixing plate, the first limiting block and the second limiting block are arranged adjacent to each other in the front-rear direction, and the first limiting block is located behind the second limiting block; the first limiting block and the second limiting block are angular blocks that are engaged with each other, and the first limiting block and the second limiting block are used to limit the displacement of the sealing strip fixing plate in the moving direction of the trolley and in the width direction of the sealing strip.

2. The self-adjusting sealing device according to claim 1, characterized in that: The first limiting block is arranged on the spring fixing plate.

3. The self-adjusting sealing device according to claim 1 or 2, characterized in that: The heights of both the first limiting block and the second limiting block are less than the distance between the sealing strip fixing plate and the spring fixing plate.

4. The self-adjusting sealing device according to claim 3, characterized in that: The distance between the first limiting block and the sealing strip fixing plate is less than the distance between the second limiting block and the spring fixing plate.

5. The self-adjusting sealing device according to claim 1, characterized in that: A pair of support springs are arranged on the spring fixing plate, the support springs are located at both ends of the spring fixing plate, and the first limiting block and the second limiting block are located in the middle of the spring fixing plate.

6. The self-adjusting sealing device according to claim 1, characterized in that: The end edge of the sealing strip is rounded.

7. The self-adjusting sealing device according to claim 1, characterized in that: A strip-shaped sealing pad is arranged on the side wall and / or end face of the sealing strip fixing plate.

8. The self-adjusting sealing device according to claim 1, characterized in that: The end of the sealing strip is stepped.

9. The self-adjusting sealing device according to claim 1, characterized in that: A spring seat and an adjusting screw rod penetrating through the spring fixing plate are arranged on the spring fixing plate, the support spring is arranged on the spring seat, and the top of the adjusting screw rod passes through the spring fixing plate and is connected to the spring seat.

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