CN103629932B - Differential pressure sealing device and sintering or cooling device - Google Patents

Abstract

A differential pressure sealing device and a sintering machine, the differential pressure sealing device is used to seal the gap between the bottom of the trolley and the top of the bellows, including a sealing plate located next to the side wall of the bellows; also includes: a sealing plate support set on the top of the bellows , the sealing plate is arranged on the sealing plate supporting member, and the sealing plate supporting member pushes the sealing plate to the bottom of the trolley; the vertical section shape of the sealing plate is L-shaped, and the sealing plate includes a horizontal part and a vertical The straight part, the horizontal part is in contact with the bottom surface of the trolley, and the vertical part is in contact with the side wall of the bellows. The present invention uses the pressure difference between the bellows and the bottom of the trolley and the pressure difference between the bellows and the external pressure of the bellows, and simultaneously sets the sealing plate support to lift the sealing plate upward, so that when the sealing plate is sucked to the bellows side by negative pressure, Keep the sealing plate in contact with the bottom or bottom side of the trolley to ensure the sealing effect.

Description

Differential pressure sealing device and sintering or cooling equipment

technical field

The invention belongs to the technical field of sintering or cooling equipment in the smelting industry, and in particular relates to a technology for sealing the gap between the trolley and the bellows by using the pressure difference between the inside of the bellows and the outside of the bellows.

Background technique

In steel production, sintering production is one of the important processes, which provides high-quality raw materials for blast furnace ironmaking. In the existing sintering system, the trolley is located above the bellows of the sintering machine. After the trolley is filled with mixed materials, it runs on the trolley rails on both sides of the bellows. The top of the mixture is ignited through the ignition furnace, and the bellows draw air from the lower part of the trolley to make the mixing The material is sintered downwards from the top of the trolley. In order to make the bellows achieve a good draft effect, it must be ensured that there is a reliable seal between the bellows of the sintering machine and the trolley, so that there is no or as little air leakage as possible. Reducing sintering air leakage is the key and difficult point in sintering design and production maintenance. Due to the gaps between trolleys and between trolleys and bellows, air leakage is serious, even reaching more than 50%, which not only wastes energy, but also causes noise pollution. environment, and limit the improvement of sintering production efficiency and affect product quality.

Most of the traditional trolley and sintered bellows are sealed by means of the elastic swimming plate at the bottom of the trolley contacting the slideways on both sides of the bellows to seal both sides of the trolley. The swimming plate-sliding way seal Most of the contact surfaces are flat, relying on the pressure of the spring above the swimming plate, so that the upper and lower planes are in contact with each other to achieve sealing when sliding relative to each other. During use, in order to reduce the frictional resistance between the elastic swimming plate and the slideway, Generally, an oil tank is set on the fixed slideway, and the electric dry oil pump continuously injects high-temperature-resistant butter. Due to the high ambient temperature of the bellows, it is easy to cause dehydration and dryness of the filled butter, which is not conducive to the filling of butter and the lubrication of the slideway. , and during the operation of the trolley, the sintered raw material and clinker are easily bonded to the elastic slideway, causing grinding and damage to the elastic slideway, resulting in air leakage gaps, resulting in a large amount of air leakage, and increasing the inactive power of the sintering fan , and it is easy to cause the sintering time to be prolonged, or even the sintering yield to be reduced, and the sintering output to be reduced. Simultaneously, because the slideway seal adopts the form of hard seal, the running resistance is increased during the operation of the pushcart machine or the chain belt machine, which accelerates the wear of the elastic slideway and increases the possibility of air leakage. Because the air leakage problem cannot be solved, the traditional sintering method only has to increase the air volume of the sintering fan to ensure the sintering output, which in turn causes the doubling of the sintering power consumption, operation cost and maintenance cost.

In order to solve the above problems, the applicant designed a side sealing device between the trolley and the bellows. The sealing plate is installed on the sealing plate installation member on the mounting bracket outside the top of the bellows. The sealing device adopts the method of sealing from the side, and uses the negative pressure formed when the bellows draws air to absorb the sealing plate. The gap between them is sealed. Although the side seal can overcome the lack of easy wear of the seal in the traditional swimming plate-sliding way pressing up and down the sealing structure, the air leakage is low, and the utilization rate of the air volume is improved. The side contact of the trolley seals, but the seal between the top of the seal plate and the underside of the trolley is poor.

Contents of the invention

The object of the present invention is to provide a differential pressure sealing device with good sealing effect between the trolley and the bellows and a sintering or cooling device using the differential pressure sealing device.

In order to achieve the above object, the present invention takes the following technical solutions:

The differential pressure sealing device is used to seal the gap between the bottom of the trolley and the top of the bellows, including a flexible sealing plate located next to the side wall of the bellows; a sealing plate support set on the top of the bellows, and the sealing plate is arranged on the sealing plate On the support member, the sealing plate support pushes the sealing plate to the bottom of the trolley; the vertical section shape of the sealing plate is L-shaped, and the sealing plate includes a horizontal part and a vertical part, and the horizontal part and the platform The bottom of the vehicle is in contact, and the vertical portion is in contact with the bellows side walls.

Preferably, the support member for the sealing plate is a support spring arranged vertically, and the sealing plate is arranged on top of the support spring.

Preferably, the sealing plate support is a vertical plate arranged along the traveling direction of the trolley, and the sealing plate is arranged on the top of the vertical plate and inside the vertical plate.

Preferably, the riser has an arc-shaped elastic portion.

Preferably, the sealing plate support includes an adjusting cylinder, a supporting lever and a mounting frame, the adjusting cylinder and the mounting frame are arranged on the frame body at the top of the bellows, the rotating shaft of the supporting lever is arranged on the mounting frame, the The piston rod of the adjusting cylinder is connected with one end of the support lever, and the other end of the support lever is connected with the horizontal part of the sealing plate.

Preferably, the adjusting cylinder is replaced by a push rod and a push spring sleeved on the push rod, and one end of the push rod is connected with one end of the support lever.

Preferably, the sealing plate is in the shape of a strip with a vertical cross section, a groove extending along the length direction of the trolley is provided at the bottom of the trolley, the sealing plate support is arranged along the groove, and the sealing The plate is in contact with the interior of the groove.

Preferably, an auxiliary seal is provided in the groove, the auxiliary seal is in an inverted U-shape, L-shape or T-shape, the top surface of the sealing plate is in contact with the inner bottom surface of the auxiliary seal, and the side surface is in contact with the inner bottom surface of the auxiliary seal. The sides of the secondary seal are in contact.

Preferably, the bottom of the trolley is provided with a groove extending along the length direction of the trolley, and an auxiliary seal is arranged in the groove, the auxiliary seal is in the shape of an inverted U, an L or a T, and the seal The horizontal part of the plate is in contact with the inner top surface of the auxiliary seal, and the vertical part is in contact with the side wall of the bellows and/or the side wall of the auxiliary seal.

The sintering machine provided with the above-mentioned differential pressure sealing device includes a trolley located above the bellows, the trolley is supported on the track by the trolley wheels and can move above the bellows along the track, and the differential pressure sealing device is arranged on the bellows and between the bottom of the trolley.

It can be known from the above technical solution that the differential pressure sealing device of the present invention utilizes the pressure difference formed between the pressure between the bellows and the bottom of the trolley and the pressure outside the bellows to make the sealing plate adhere to the sidewall of the bellows or the sidewall of the auxiliary seal The sealing plate support is provided to lift the sealing plate upward, so that the sealing plate is pressed against the side wall of the bellows while keeping the sealing plate in contact with the bottom or bottom side of the trolley to ensure the sealing effect. The advanced pressure differential sealing device can not only be used for step-by-step sintering/cooling equipment, but is especially suitable for chain-belt sintering/cooling equipment.

Description of drawings

Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a structural schematic view of Embodiment 1 from another angle.

Fig. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

Fig. 4 is a partial structural schematic diagram of the trolley and the side sealing device in Embodiment 2.

FIG. 5 is a schematic diagram of another angle of FIG. 4 .

Fig. 6 is a schematic structural diagram of Embodiment 3 of the present invention.

Fig. 7 is a schematic structural diagram of Embodiment 4 of the present invention.

Fig. 8 is a schematic structural diagram of Embodiment 5 of the present invention.

Fig. 9 is a schematic structural diagram of Embodiment 6 of the present invention.

The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

detailed description

Example 1

The present invention will be further described below by taking sintering equipment as an example. As shown in Figure 1 and Figure 2, in the sintering equipment, the trolley 1 is erected above the bellows 2 through the trolley wheel 1a, and the trolley wheel 1a is placed on the track 3. During the sintering process, the trolley 1 is above the bellows 2 along the track 3 After moving, after the whole process of sintering is completed through material distribution, ignition, sintering, and cooling to the tail of the machine, trolley 1 turns the sintered ore in it into the sinter ore tank, and then trolley 1 returns to the starting position, repeating the above-mentioned cycle sintering process. For the convenience of the following description, the length direction of the trolley 1 (that is, the traveling direction of the trolley) is defined as the longitudinal direction, the width direction of the trolley 1 (perpendicular to the length direction) is defined as the transverse direction, and the side relatively close to the center of the bellows is defined as inside. The sintering frame body is provided with a sintering bin, material distributing mechanism, ignition furnace, holding furnace, ash hopper, ash cleaning valve, cart machine, unloading mechanism, crusher and mineral material conveyor. The above components and installation methods are the same as Corresponding components and installation methods of the sintering machine in the prior art are the same, and will not be repeated here.

A groove 1b extending along the length direction of the trolley 1 is provided at the bottom of the trolley 1, and an auxiliary seal 1c with an inverted U-shaped vertical cross-section is arranged in the groove 1b. The auxiliary seal 1c in this embodiment is made of stainless steel Made, the inner side wall of the auxiliary seal 1c is finished. The auxiliary seal 1c is fixed to the groove 1b by bolts.

A sealing plate support 4 is provided on the top side wall of the bellows 2. The sealing plate support 4 of this embodiment is a vertical plate, which is fixed on the side wall 2a of the bellows 2 by a pressing plate 4a and bolts 4b. The sealing plate support 4 It can also be fixed on the horizontal plane beside the bellows. The sealing plate support 4 of this embodiment is arranged along the track 3 , and the vertical plate-shaped sealing plate support 4 simultaneously forms a sealing wall outside the bellows 2 . An inverted L-shaped sealing plate 5 is provided on the sealing plate support 4, and the sealing plate 5 includes a horizontal portion 5a and a vertical portion 5b. The sealing plate 5 is fixed to the top of the sealing plate support 4 by bolts. Under the support of the sealing plate support 4, the upper part of the sealing plate 5 is located in the auxiliary sealing member 1c, and the horizontal part 5a of the sealing plate 5 is in contact with the auxiliary sealing member 1c. contact with the inner bottom surface. As a preferred technical solution, the sealing plate support 4 of this embodiment has an arc-shaped elastic portion 4c, and the elastic portion 4c allows the sealing plate 5 arranged on the sealing plate support 4 to have a certain position adjustment in the vertical direction. It can be attached to the bottom of the trolley according to the shape, and the sealing effect is better. The sealing plate 5 in this embodiment is made of a heat-resistant sealing material with a certain thickness, such as high-temperature-resistant and wear-resistant rubber.

In this embodiment, an auxiliary seal 1c is provided in the groove 1b at the bottom of the trolley. On the one hand, the space of the groove 1b can be extended downward to ensure the contact area between the sealing plate and the groove to achieve good sealing. On the other hand, the auxiliary seal The surface of the part is easier to finish, and the smooth surface causes less wear to the sealing plate. However, the sealing plate can also be directly in contact with the groove in the bottom of the trolley.

When the sintering fan is running, a negative pressure zone will be formed between the bottom of the trolley 1 and the bellows 2, so that the pressure between the bottom of the trolley and the bellows is smaller than the pressure outside the bellows. Under the adsorption of negative pressure, the sealing plate 5 will stick To the side wall 2a of the air box 2 and the inner side wall of the auxiliary sealing member 1c, the sealing plate 5 and the sealing plate support member 4 form a side sealing wall to realize the sealing between the bottom of the trolley and the air box.

Example 2

As shown in Figure 3, Figure 4 and Figure 5, the difference between this embodiment and Embodiment 1 is that the sealing plate support 4 of this embodiment includes an adjustment cylinder 4-1, a support lever 4-2 and a mounting frame 4- 3. The adjusting cylinder 4-1 is horizontally arranged on the sintered frame body, beside the side wall 2a of the bellows 2. Mounting frame 4-3 is fixed on the sintering frame body, and the rotating shaft 4-2a of support lever 4-2 is fixed with mounting frame 4-3. The piston rod of the adjustment cylinder 4-1 is connected with one end of the support lever 4-2, and the other end (support end) of the support lever 4-2 is connected with the horizontal part 5a of the sealing plate 5, and the adjustment cylinder 4-1 is used to push the support lever 4-2, make the support lever 4-2 rotate around the rotating shaft 4-2a, thereby supporting the sealing plate 5 upward. Under the action of the adjusting cylinder 4-1, the support lever 4-2 lifts up the sealing plate 5, so that the horizontal part 5a of the sealing plate 5 contacts the bottom of the trolley 1 (or the bottom surface of the groove of the trolley).

When the sintering fan is running, a negative pressure zone is formed between the trolley 1 and the bellows 2. Under the adsorption of negative pressure, the inner surface of the vertical part 5b of the sealing plate 5 is automatically attached to the side wall 2a of the bellows 2, so that the top of the bellows 2 The gap with the bottom of the trolley 1 is completely closed by the sealing plate 5 to achieve a sealing effect.

As a preferred technical solution, in this embodiment, the side wall where the bellows 2 is in contact with the sealing plate is not a vertical plane, but an inclined surface. The inclined contact surface can provide adjustment space when the trolley deviates, ensuring the sealing Effect.

Example 3

As shown in Figure 6, the difference between this embodiment and Embodiment 2 is that the sealing plate support 4 of this embodiment is a support spring, the axis of the support spring is in the vertical direction, and several support springs are arranged at intervals on the top of the bellows 2 frame level. The sealing plate 5 is installed on the top of the supporting spring, and under the elastic force of the supporting spring, the sealing plate 5 is lifted up, so that the horizontal portion 5a of the sealing plate 5 is in contact with the bottom of the trolley 1 . When the sintering fan is running, a negative pressure zone is formed between the trolley 1 and the bellows 2. Under the adsorption of negative pressure, the vertical part 5b of the sealing plate 5 is in close contact with the side wall 2a of the bellows 2 to form a seal.

Example 4

As shown in Figure 7, the difference between this embodiment and Embodiment 1 is that the auxiliary seal 1c of this embodiment is L-shaped, the auxiliary seal 1c is arranged in the groove 1b at the bottom of the trolley 1, and the sealing plate 5 is The vertical section shape is a rectangular strip plate, and the sealing plate 5 is installed on the top of the sealing plate support member 4 . Since the sealing plate support 4 is arranged along the track 3 , the sealing plate support 4 can also form a sealing wall while supporting the sealing plate 5 .

When the sintering fan is running, the sealing plate 5 is adsorbed to be in contact with the side of the auxiliary seal 1c under negative pressure, and the top surface of the sealing plate 5 is in contact with the inner top surface of the auxiliary seal 1c under the action of the sealing plate support 4 Contact, the sealing plate 5 cooperates with the sealing plate support member 4 to form a closed space between the sealing plate 5 and the inner side of the sealing plate support member 4 to realize sealing. Since the sealing plate support 4 has the function of a sealing surface, the sealing plate 5 only needs to be in close contact with the bottom of the trolley to achieve side sealing together with the sealing plate support 4, and the sealing plate 5 does not necessarily have to be in contact with the side wall of the bellows. 2a are in contact.

Example 5

As shown in Figure 8, the difference between this embodiment and Embodiment 4 is that the auxiliary seal 1c arranged in the groove 1b at the bottom of the trolley 1 is roughly T-shaped, and the inner surface of the sealing plate 5 is in contact with the auxiliary seal 1c. The outer surface of the seal is in contact with each other, and the seal plate 5 cooperates with the seal plate support 4 to realize the negative pressure side seal.

Example 6

As shown in Figure 9, the difference between this embodiment and Embodiment 2 is that this embodiment uses a thrust spring 4-1' to replace the adjustment cylinder, and the thrust spring 4-1' is sleeved on the push rod 4-4, and the push rod 4-4 is fixed by the mounting frame 4-3', the push rod 4-4 is equivalent to the piston rod of the adjusting cylinder, and the rotating shaft 4-2a is also arranged on the mounting frame 4-3'. The push rod 4-4 promotes the support lever 4-2 under the elastic force of the thrust spring 4-1', so that the support lever 4-2 lifts the sealing plate 5 upwards, contacts with the bottom of the trolley, and realizes sealing.

When the present invention uses sintering or cooling equipment to operate, the pressure between the trolley and the bellows is different from the pressure outside the bellows, so there is a pressure difference. The sealing plate is arranged between the bottom of the trolley and the side wall of the bellows, and the sealing plate acts on the positive pressure. The bottom is in contact with the side wall of the bellows or the inner surface of the auxiliary seal, thereby sealing the gap between the bottom of the trolley and the side wall of the bellows. When the pressure between the trolley and the bellows is negative pressure (that is, the pressure between the trolley and the bellows is less than the external pressure of the bellows), as described in the previous embodiment, the sealing plate is arranged on the outside of the side wall of the bellows, and the sealing part of the sealing plate is in contact with the bellows. The outer wall of the bellows is in contact; when the pressure between the trolley and the bellows is positive (that is, the pressure between the trolley and the bellows is greater than the external pressure of the bellows), correspondingly, the sealing plate can be set on the inner side of the bellows, and the sealing plate The sealing portion is in contact with the inner side wall of the bellows. The differential pressure side sealing device of the present utility model can be used not only on stepping sintering equipment, but also on chain-belt sintering equipment. In addition, the above-mentioned embodiments are explained by taking sintering equipment as an example. The structure of cooling equipment and sintering equipment is roughly Likewise, the side seal can therefore also be used in belt or walk-through cooling systems.

In the above embodiment, the length of the sealing plate is equal to the length of the trolley, but as an alternative to the above technical solution, the length of the sealing plate can also be different from the length of the trolley, for example, the length of the sealing plate can be greater than or less than the length of the trolley, The length of the sealing plate installed on the adjacent trolley only needs to be shortened or increased by a corresponding length, and those skilled in the art can make corresponding designs according to different situations to realize full-section sealing.

Each part in this specification is described in a progressive manner, and each part focuses on the difference from other parts, and the same or similar parts of each part can be referred to each other. In the aforementioned embodiments, the forms between the sealing plate, the sealing plate support, and the auxiliary seal can be combined with each other. For example, the structure of the sealing plate and the sealing plate support in embodiment 2 can also be used in embodiment 1. These parts The combination relationship among them is not limited to the forms disclosed in the embodiments, and the above description of the disclosed embodiments enables those skilled in the art to realize or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. differential pressure sealing device, for sealing the gap between pallet bottom and bellows top, comprising and being positioned at the other flexible sealing plate of bellows side wall; It is characterized in that, also comprise:

Be arranged at the sealing plate support member at bellows top, described sealing plate is arranged on described sealing plate support member, and described sealing plate top to pallet bottom, and makes described sealing plate in the vertical direction have position adjustments amount by described sealing plate support member;

The vertical section shape of described sealing plate is L shape, and sealing plate comprises horizontal part and vertical portion, and described horizontal part contacts with described pallet bottom, and described vertical portion contacts with bellows side wall.

2. differential pressure sealing device according to claim 1, is characterized in that: described sealing plate support member is the support spring vertically arranged, and described sealing plate is arranged at described support spring top.

3. differential pressure sealing device according to claim 1, is characterized in that: described sealing plate support member is the riser arranged along chassis direct of travel, and described sealing plate is arranged at described riser top, is positioned at inside described riser.

4. differential pressure sealing device according to claim 3, is characterized in that: described riser has the elastic portion of arc.

5. differential pressure sealing device according to claim 1, it is characterized in that: described sealing plate support member comprises adjusting cylinders, support lever and installing rack, described adjusting cylinders and installing rack are arranged on the support body at bellows top, the rotating shaft of described support lever is arranged on described installing rack, the piston rod of described adjusting cylinders is connected with one end of support lever, and the other end of described support lever is connected with the horizontal part of described sealing plate.

6. differential pressure sealing device according to claim 5, is characterized in that: described adjusting cylinders is substituted by push rod and the thrust spring be sheathed on described push rod, and one end of described push rod is connected with one end of described support lever.

7. differential pressure sealing device, for sealing the gap between pallet bottom and bellows top, comprising and being positioned at the other flexible sealing plate of bellows side wall; It is characterized in that, also comprise:

Be arranged at the sealing plate support member at bellows top, described sealing plate is arranged on described sealing plate support member, and described sealing plate top to pallet bottom, and makes described sealing plate in the vertical direction have position adjustments amount by described sealing plate support member;

Described sealing plate support member is the riser arranged along chassis direct of travel, and described sealing plate is arranged at described riser top, is positioned at inside described riser, and described riser has the elastic portion of arc;

The bar shaped of described sealing plate to be vertical section shape be rectangle, described pallet bottom is provided with the groove extended along chassis length direction, and described sealing plate support member is arranged along described groove, and described sealing plate contacts with inside grooves.

8. differential pressure sealing device according to claim 7, it is characterized in that: in described groove, be provided with auxiliary sealing member, described auxiliary sealing member is reverse U shape or L shape or T-shaped, and the end face of described sealing plate contacts with described auxiliary sealing member inner bottom surface, side contacts with the side of described auxiliary sealing member.

9. the differential pressure sealing device according to any one of claim 1 to 6, it is characterized in that: described pallet bottom is provided with the groove extended along chassis length direction, auxiliary sealing member is provided with in described groove, described auxiliary sealing member is reverse U shape or L shape or T-shaped, the horizontal part of described sealing plate contacts with described auxiliary sealing member inner top surface, and described vertical portion contacts with the sidewall of bellows side wall and/or described auxiliary sealing member.

10. be provided with claim 1 to or 9 any one described in the sintering machine of differential pressure sealing device, it is characterized in that: comprise the chassis be positioned at above bellows, chassis is supported on track by trolley wheel and also can moves above bellows along track, and described differential pressure sealing device is arranged between described bellows and described pallet bottom.