A mobile smoke dust capturing device and its pipe sealing assembly and method of use

Abstract

This application relates to the field of dust removal technology, and discloses a mobile dust collection device and its pipeline sealing assembly and method of use. The pipeline sealing assembly includes an inner sleeve, an outer sleeve, a movable reset assembly, and first and second sealing elements. The outer sleeve is fitted over the outer side of the inner sleeve, and the movable reset assembly is located on the outer side of the inner sleeve. The outer sleeve is connected to the movable reset assembly. The first end of the inner sleeve is connected to or is the tail end of the mobile pipe. The second sealing element surrounds the tail end of the outer sleeve, and the first sealing element surrounds the first end of the fixed pipe. When a negative pressure is generated inside the inner sleeve, the second sealing element moves towards and presses against the first sealing element. The movable reset assembly controls the reset of the outer sleeve. In application, this pipeline sealing assembly enables automatic connection and stable sealing between the mobile and fixed pipes when dust removal operation begins, and automatic unsealing of the mobile and fixed pipes and restoration of the collection hood to a freely movable state when operation ends, improving work efficiency, reducing safety risks, and facilitating operation.

Description

Technical Field

[0001] This application relates to the field of dust removal technology, and in particular to a mobile dust collection device and its pipeline sealing components and method of use. Background Technology

[0002] Some workstations in the steelmaking process, such as those for ladle tumbler casting, ladle hot repair, tundish turning, and ladle slag removal, generate large amounts of dust during operation. These dust-generating points are located within the work area, and without dust control measures, the dust will permeate the entire production workshop, seriously endangering the health of on-site operators and production safety. Therefore, dust collection devices are typically installed above or to the side of the dust-generating points. The collection hood of these devices is connected to a dust collector via ductwork. Under the negative pressure suction of the dust collector, the collection hood draws in the surrounding flue gas and sends it through the ductwork to the dust collector. After purification by the dust collector, clean air is discharged.

[0003] In certain operating conditions, such as equipment maintenance, lifting, and transportation, the dust collection device needs to be moved. This necessitates that the dust collection device be designed to be mobile. A mobile dust collection device can move along a fixed track. When equipment maintenance, lifting, or transportation is required, the dust collection device is moved along the track. When dust collection is needed, the device is moved back to its working position. Typically, the duct connected to the dust collector (the fixed end pipe) is fixed in one position. When the collection hood is in its working position, the duct connected to the collection hood (the mobile end pipe) is moved to align with the fixed end pipe (coaxial), thereby drawing the dust from the collection hood into the dust collector. In practice, to ensure that the mobile end pipe and the fixed end pipe do not collide when the collection hood is moved, these two pipes are usually kept at a safe distance of 50-100mm during dust collection. While this setup ensures that the collection hood can move freely, the excessive air leakage rate in the pipes during operation reduces dust removal efficiency. At the same time, a large amount of clean air enters the dust collector from the gap between the moving end pipe and the fixed end pipe, increasing the burden on the dust removal system and resulting in high system energy consumption.

[0004] Existing technologies address the issues of air leakage and clean air intake caused by the aforementioned safety distance by installing a sealing structure between the moving and fixed end pipes. For example, patent application CN111632986A discloses a ladle hot repair dust removal device. This device has sealing components installed on both the moving and fixed end pipes of the collection hood to form a sealing assembly. When dust collection is required, the moving collection hood moves the moving end pipe towards the fixed end pipe until the two sealing components contact, thus preventing air leakage during dust collection. After dust collection, the moving collection hood moves the moving end pipe away from the fixed end pipe until the two sealing components separate. While this ladle hot repair dust removal device can prevent air leakage and clean air intake through the gap between the moving and fixed end pipes to a certain extent during dust removal, it has the following drawbacks:

[0005] After aligning the mobile end pipe with the fixed end pipe, the collection hood needs to be moved again to move the mobile end pipe toward the fixed end pipe to achieve a seal. Moreover, the travel of the collection hood needs to be precisely controlled to ensure that the mobile end pipe and the fixed end pipe make contact with the right force. At the same time, after the dust removal operation is completed, the two seals on the mobile end pipe and the fixed end pipe are still in contact, requiring the collection hood to be moved again to put it into a freely movable state. However, in actual production, the large dust removal air volume makes the collection hood and air duct bulky, and the inertia of the collection hood during movement is large. It is very easy for the two ends of the pipe to collide due to inaccurate operation. This can result in pipe deformation or even equipment collapse and other production accidents. The operation is inconvenient, the safety risk is high, and the work efficiency is low.

[0006] It is evident that while existing mobile dust collection devices employing pipe sealing can, to some extent, prevent air leakage between the mobile and fixed pipes and the intake of clean air during dust removal, they also present technical problems such as inconvenience in operation, high safety risks, and low work efficiency because the collection hood needs to be moved before the dust removal operation begins to complete the sealing and the collection hood is in a state where it cannot be moved freely when the dust removal operation ends. Summary of the Invention

[0007] The purpose of this application is to provide a pipe sealing assembly that, without relying on the movement of the collection hood, automatically connects and stably seals the mobile and fixed ends of a mobile dust collection device when dust removal operations are initiated, and automatically deseals the mobile and fixed ends when dust removal operations are completed, allowing the collection hood to return to a freely movable state. This improves work efficiency, reduces safety risks, and is convenient to operate. Another purpose of this application is to provide a mobile dust collection device. A further purpose of this application is to provide a method for using the mobile dust collection device.

[0008] To solve the above-mentioned technical problems, this application provides a pipe sealing assembly for sealing between the mobile end pipe and the fixed end pipe of a mobile dust collection device, comprising: an inner sleeve, an outer sleeve, a mobile reset assembly, a first sealing element, and a second sealing element;

[0009] The outer sleeve is fitted on the outside of the inner sleeve, the movable reset component is disposed on the outside of the inner sleeve, the outer sleeve is connected to the movable reset component, the first end of the inner sleeve is connected to the tail end of the movable end pipe or is the tail end of the movable end pipe, the second sealing member is disposed around the tail end of the outer sleeve, and the first sealing member is disposed around the first end of the fixed end pipe.

[0010] When a negative pressure is generated inside the inner sleeve, the second seal can drive the outer sleeve to move toward the first seal and press against the first seal. The moving reset assembly is used to control the reset of the outer sleeve.

[0011] Optionally, the movable reset assembly includes a fixed base and a spring;

[0012] The fixing seat is fixed to the outer wall of the inner sleeve, the spring is located on the side of the fixing seat near the second seal, the first end of the spring is connected to the fixing seat, and the last end of the spring is connected to the outer sleeve.

[0013] Optionally, the movable reset assembly further includes a slide and a guide rod;

[0014] The slide is located outside the inner sleeve. One end of the slide is connected to the tail end of the spring, and the other end of the slide is connected to the outer sleeve. One end of the guide rod is connected to the fixed seat, and the other end of the guide rod passes through the spring and the slide in sequence.

[0015] Optionally, the number of springs and guide rods is the same, and there are several of each;

[0016] The slide block is located on the side of the spring near the second seal. The slide block has the same number of sliding holes as the spring. Several springs are evenly distributed circumferentially along the outer side of the inner sleeve. Each guide rod corresponds to a spring and a sliding hole. The guide rod passes through the corresponding spring and the corresponding sliding hole in sequence.

[0017] Optionally, the movable reset assembly further includes a mounting bracket;

[0018] The fixing bracket is fixed to the outer wall of the inner sleeve. The fixing bracket is located on the side of the slide block near the second seal. The guide rod passes through the slide block and is fixedly connected to the fixing bracket.

[0019] Optional features also include: a third seal and a fourth seal;

[0020] The third seal is disposed around the outer side wall of the inner sleeve, and the fourth seal is disposed around the inner side wall of the outer sleeve. The third seal is located on the side of the fourth seal closer to the second seal. When the second seal is pressed against or away from the first seal, the fourth seal is correspondingly pressed against or away from the third seal.

[0021] Optionally, both the first and second sealing elements are flanges, and a sealing gasket is provided on the first end face of the first sealing element or the second end face of the second sealing element.

[0022] Optionally, the stiffness coefficient k of the spring is:

[0023] k=f1 / ΔL

[0024] Wherein, f1 is the frictional force experienced by the outer sleeve during movement; ΔL is the width of the gap between the first seal and the second seal when the outer sleeve is reset;

[0025] The area S of the first end face of the second seal member satisfies:

[0026] S≥2(k×ΔL) / ΔP

[0027] Wherein, ΔP is the air pressure difference between the first end face and the last end face of the second seal when the outer sleeve moves toward the first seal.

[0028] This application also provides a mobile dust collection device, including a collection hood, the collection hood being connected to the first end of the mobile end pipe, and a dust collector being connected to the tail end of the fixed end pipe, and further including: a support, a walking mechanism, and the pipe sealing assembly;

[0029] The trapping hood is fixed to the bracket, and the walking mechanism is located at the bottom of the bracket.

[0030] This application also provides a method of using the aforementioned mobile smoke and dust collection device, including:

[0031] Control the walking mechanism to move, driving the bracket, the mobile end pipe, and the trapping hood to move until the mobile end pipe and the fixed end pipe are coaxial and the distance between the second seal and the first seal is a safe distance;

[0032] When the dust collector is turned on, negative pressure is generated inside the fixed end pipe, inside the inner sleeve, and in the gap between the first seal and the second seal. The second seal is subjected to a thrust. Under the action of the thrust, the second seal moves toward the first seal until it presses against the first seal.

[0033] After the dust removal operation is completed, the dust collector is turned off. The negative pressure inside the fixed end pipe, inside the inner sleeve, and in the gap between the first seal and the second seal disappears. The moving reset component controls the outer sleeve to reset, and the second seal moves away from the first seal.

[0034] The pipe sealing assembly provided in this application has an outer sleeve fitted over an inner sleeve. A movable reset assembly is provided on the outer sleeve and connected to it. A second seal is provided around the tail end of the outer sleeve, and a first seal is provided around the head end of the fixed-end pipe in the mobile dust collection device. Simultaneously, the head end of the inner sleeve is connected to the tail end of the mobile-end pipe in the mobile dust collection device, or the inner sleeve is positioned as the tail end of the mobile-end pipe. Before dust collection operations begin, the mobile-end pipe is moved to a safe distance and aligned with the fixed-end pipe. When dust collection operations begin, the dust collection system uses a sealant to seal the inside of the fixed-end pipe, the inside of the inner sleeve, and the first and second seals. The difference between the negative pressure generated between the two seals and the atmospheric pressure on the tail end face of the second seal can cause the second seal to automatically move towards and press against the first seal. When the dust removal operation ends and the negative pressure disappears, the moving reset component is used to make the second seal automatically leave the first seal and reset. Thus, without relying on the movement of the collection hood, the mobile end pipe and the fixed end pipe of the mobile dust collection device can be automatically connected and stably sealed when the dust removal operation is started, and automatically unsealed when the dust removal operation ends, and the collection hood returns to a freely movable state. This improves work efficiency, reduces safety risks, and is convenient to operate. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the pipe sealing assembly provided in the embodiments of this application when sealing the moving end pipe and the fixed end pipe;

[0036] Figure 2 This is a schematic diagram of the structure of the mobile smoke and dust collection device provided in the embodiments of this application.

[0037] The reference numerals in the above figures are explained as follows:

[0038] 1-Flow control valve; 2-Fixed end pipe; 3-Pipe sealing assembly; 31-Inner sleeve; 32-Outer sleeve; 33-Moving reset assembly; 331-Fixed seat; 332-Slide seat; 333-Spring; 334-Guide rod; 335-Fixed bracket; 34-First seal; 35-Second seal; 36-Third seal; 37-Fourth seal; 38-Sealing gasket; 4-Moving end pipe; 5-Bracket; 6-Traveling mechanism; 7-Collection hood; 8-Connecting flange. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] In this application, the "head end" of each pipe refers to the "air inlet end" of the pipe during the dust removal operation, and correspondingly, the "tail end" of each pipe refers to the "air outlet end" of the pipe.

[0041] The term "several" as used in this application refers to a number of uncertain quantities, usually two or more; and when "several" is used to indicate the quantity of certain components, it does not indicate the relationship between these components in terms of quantity.

[0042] The terms "first" and "second" used in this application are merely for the convenience of describing two or more structures or components that are identical or similar in structure and / or function, and do not imply any special limitation on their order and / or importance.

[0043] A dust collection device is a device that uses the negative pressure generated by a dust collector to collect dust through a collection hood. The dust collection device can be mobile. In this case, the dust collection device includes a duct fixedly connected to one end of the dust collector, i.e., fixed-end pipe 2, and a duct connected to one end of the collection hood 7, i.e., mobile-end pipe 4. The mobile-end pipe 4, together with the collection hood 7, is designed to be movable. In a mobile dust collection device, the fixed-end pipe 2 is usually fixed in a certain position according to the dust collector. During use, the mobile collection hood 7 moves the mobile-end pipe 4 to align with the fixed-end pipe 2, i.e., coaxial. To ensure that the mobile-end pipe 4 does not collide with the fixed-end pipe 2 when the collection hood 7 is moved, a safety distance of 50-100mm is reserved between the tail end of the mobile-end pipe 4 and the head end of the fixed-end pipe 2.

[0044] To prevent air leakage and the inhalation of clean air due to the required safety distance, existing technologies employ a sealing structure between the moving end pipe 4 and the fixed end pipe 2. However, these sealing methods require precise movement of the collection hood to achieve a seal after the moving end pipe 4 and the fixed end pipe 2 are aligned. Furthermore, the collection hood must be moved after dust removal operations to release the seal and allow it to move freely. In actual production, the large volume of dust removal air results in a bulky collection hood and ductwork, leading to significant inertia during movement. Moving the collection hood when the distance between the moving end pipe 4 and the fixed end pipe 2 is only 50-100mm, or when the connection between them is sealed, can easily cause collisions between the two pipes, resulting in production accidents. This also leads to inconvenient operation and low work efficiency.

[0045] To address the technical problems of inconvenience, high safety risks, and low work efficiency in the aforementioned mobile dust collection devices where the sealing method relies on the movement of the collection hood and the collection hood is in a state of immobility after the dust removal operation, this application provides a pipe sealing assembly. This assembly includes inner and outer sleeves, two sealing elements, and a moving reset assembly. It can achieve automatic and stable connection and sealing between the moving end pipe 4 and the fixed end pipe 2 when the dust removal operation begins, and automatic unsealing of the moving end pipe 4 and the fixed end pipe 2 when the dust removal operation ends, allowing the collection hood to return to a freely movable state.

[0046] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the pipe sealing assembly provided in this application when sealing the moving end pipe and the fixed end pipe.

[0047] In this embodiment, the main body of the pipe sealing assembly is mounted on the moving end pipe 4 and can move freely with the moving end pipe 4, serving as a seal between the moving end pipe 4 and the fixed end pipe 2. Figure 1 As shown, the pipe sealing assembly provided in this embodiment includes an inner sleeve 31, an outer sleeve 32, a movable reset assembly 33, a first sealing element 34, and a second sealing element 35. The outer sleeve 32 is sleeved on the outside of the inner sleeve 31, and the movable reset assembly 33 is disposed on the outside of the inner sleeve 31. The outer sleeve 32 is connected to the movable reset assembly 33. The first end of the inner sleeve 31 is connected to the tail end of the movable pipe 4. The two are independently configured, which allows for easy disassembly and replacement of the pipe sealing assembly.

[0048] The second seal 35 is disposed around the tail end of the outer sleeve 32, and the first seal 34 is disposed around the head end of the fixed end pipe 2; the second seal 35 can drive the outer sleeve 32 to move towards the first seal 34 and press the first seal 34 when a negative pressure is generated inside the inner sleeve 31. Figure 1The second seal 35 moves to the left to press against the right end face of the first seal 34; the moving reset assembly 33 is used to control the reset of the outer sleeve 32. Figure 1 The control sleeve 32 moves the second seal 35 to the right, away from the first seal 34, and back to its unsealed position. Understandably, the inner diameter of the outer sleeve 32 should be larger than the outer diameter of the inner sleeve 31 to allow the outer sleeve 32 to move smoothly outside the inner sleeve 31.

[0049] Using the above solution, the mobile end pipe 4 only needs to be moved to a safe distance and aligned with the fixed end pipe 2 before the dust removal operation starts. When the dust removal operation starts, the difference between the negative pressure generated inside the fixed end pipe 2, inside the inner sleeve 31, and between the first seal 34 and the second seal 35 and the atmospheric pressure on the tail end face of the second seal 35 can automatically move the second seal 35 towards the first seal 34 and press it against the first seal 34. When the dust removal operation ends and the negative pressure disappears, the mobile reset component 33 can be used to automatically move the second seal 35 away from the first seal 34 and reset it. Thus, without relying on the movement of the collection hood, the mobile end pipe 4 and the fixed end pipe 2 of the mobile dust collection device can be automatically connected and stably sealed when the dust removal operation starts, and automatically unsealed when the dust removal operation ends, and the collection hood can be restored to a freely movable state. This improves work efficiency, reduces safety risks, and is convenient to operate.

[0050] In another embodiment provided in this application, the inner sleeve 31 can be the tail end of the mobile end pipe 4, that is, the tail end of the mobile end pipe 4 is used as the inner sleeve 31, and the inner sleeve 31 is a part of the mobile end pipe 4. By directly setting the outer sleeve 32, the mobile reset component 33, and the second seal 35 on the mobile end pipe 4, the inner sleeve 31 does not need to be manufactured separately, and the high sealing requirements at the connection point when the inner sleeve 31 and the mobile end pipe 4 are set independently are avoided, which can reduce production costs and improve the dust collection effect. Of course, if the inner sleeve 31 and the mobile end pipe 4 are set separately, the pipe sealing component 3 can be applied to different mobile end pipes 4, providing greater flexibility.

[0051] Whether the inner sleeve 31 and the moving end pipe 4 are formed separately or integrally can be selected according to specific requirements.

[0052] In actual setup, the structure of the moving reset component 33 is not limited, as long as it can allow the second seal 35 to move toward and press the first seal 34 when a negative pressure is generated inside the inner sleeve 31, and control the outer sleeve 32 to reset when the negative pressure inside the inner sleeve 31 disappears.

[0053] As an optional solution, the movable reset assembly 33 includes a fixed base 331 and a spring 333. The fixed base 331 is fixed to the outer wall of the inner sleeve 31, and the spring 333 is located on the side of the fixed base 331 near the second seal 35. The first end of the spring 333 is connected to the fixed base 331, and the last end of the spring 333 is connected to the outer sleeve 32. It should be specifically noted that the first end of the spring 333 is the end near the air inlet of the inner sleeve 31, and the last end of the spring 333 is the end near the air outlet of the inner sleeve 31. With this configuration, the outer sleeve 32 and the second seal 35 form the movable part of the pipe sealing assembly, the inner sleeve 31 and the fixed base 331 form the first fixed part of the pipe sealing assembly, the first seal 34 forms the second fixed part of the pipe sealing assembly, and the spring 333 connects the movable part and the first fixed part. The spring 333 allows the movable part to move, and under the support of the first fixed part, the spring 333 can reset the movable part.

[0054] When dust removal is not in operation, spring 333 is in its original state and is not under any force. When dust removal begins, negative pressure is generated inside the fixed end pipe 2, inside the inner sleeve 31, and between the first seal 34 and the second seal 35. The pressure difference between the atmospheric pressure at the first end face of the second seal 35 and the negative pressure at the tail end face causes the second seal 35 to be subjected to... Figure 1 The air pressure from the center to the left causes the second seal 35 to move the outer sleeve 32 away from the fixed seat 331, displacing the movable part of the pipe sealing assembly. The spring 333 is stretched until the second seal 35 presses against the first seal 34. When the dust removal operation ends, the negative pressure inside the fixed end pipe 2, inside the inner sleeve 31, and between the first seal 34 and the second seal 35 disappears. The atmospheric pressure on the right side of the second seal 35 balances with the pressure on the left side. Under the return force of the spring 333, the outer sleeve 32 moves the second seal 35 closer to the fixed seat 331 until it returns to the original position of the spring 333, and the movable part of the pipe sealing assembly resets. It can be seen that the design of the fixed seat 331 and the spring 333 ensures that the dislocation and reset process of the movable part proceeds smoothly.

[0055] Understandably, the axis of spring 333 should be parallel to the axis of inner sleeve 31 so that outer sleeve 32 can move along the axis of inner sleeve 31.

[0056] In the embodiments provided in this application, the movable reset assembly 33 further includes a slide block 332 and a guide rod 334. The slide block 332 is located outside the inner sleeve 31. One end of the slide block 332 is connected to the tail end of the spring 333, and the other end of the slide block 332 is connected to the outer sleeve 32. One end of the guide rod 334 is connected to the fixed seat 331, and the other end of the guide rod 334 passes through the spring 333 and the slide block 332 in sequence. With this configuration, on the one hand, the slide block 332 realizes the sliding connection between the outer sleeve 32 and the guide rod 334. During the movement of the outer sleeve 32, the slide block 332 is constrained on the guide rod 334, so that the entire movable part moves stably along the guide rod 334 and is not easy to shake. Correspondingly, it can also make the second seal 35 and the first seal 34 fit stably and improve the sealing effect. On the other hand, the connection between the slide block 332 and the spring 333 can increase the contact area between the outer sleeve 32 and the spring 333, making the movement of the outer sleeve 32 more stable.

[0057] As can be seen from the above, the guide rod 334 provides guidance for the movement of the movable part. In the embodiment provided in this application, the movable reset assembly 33 also includes a fixing frame 335. The fixing frame 335 is fixed to the outer wall of the inner sleeve 31, and the fixing frame 335 is located on the side of the slide block 332 near the second seal 35. The guide rod 334 passes through the slide block 332 and is fixedly connected to the fixing frame 335. With this arrangement, the guide rod 334 is fixed relative to the inner sleeve 31, making the slide block 332 more stable during movement along the guide rod 334. The guiding effect of the guide rod 334 is improved, and correspondingly, the sealing effect between the second seal 35 and the first seal 34 is also better.

[0058] The spring 333 in this application can be one or more, as long as it allows the movement of the moving part and enables the resetting of the moving part. This application does not impose any restrictions on this.

[0059] In one embodiment provided in this application, there may be one spring 333. The spring 333 is sleeved on the outside of the inner sleeve 31, with its first end connected to the fixed seat 331 and its tail end connected to the outer sleeve 32. In this case, there may be one guide rod 334, preferably two or more. When there are two or more guide rods 334, all guide rods 334 are evenly distributed along the circumference of the inner sleeve 31. One end of each guide rod 334 is connected to the fixed seat 331, and the other end passes sequentially through the spring 333 and the slide 332. With this arrangement, the guide rods 334 provide guidance for the movement of the movable part, and the spring 333 alone provides tension for the reset of the movable part. The pipe sealing assembly has a simple structure and is easy to install.

[0060] In another embodiment provided in this application, please refer to Figure 1There are several springs 333, and the number of guide rods 334 is the same as that of springs 333. A slide block 332 is located on the side of the springs 333 closest to the second seal 35. The slide block 332 has the same number of sliding holes as the springs 333. Several springs 333 are evenly distributed circumferentially along the outer side of the inner sleeve 31. Each guide rod 334 corresponds one-to-one with a spring 333 and a sliding hole, passing through the corresponding spring 333 and the corresponding sliding hole in sequence. This arrangement provides stable guidance for the movement of the moving part through the evenly distributed guide rods 334 along the circumference of the inner sleeve 31, and all the springs 333 together provide tension for the reset of the moving part, making the reset process smoother.

[0061] In actual installation, the moving reset component 33 can be installed on the inner side wall, the outer side wall, or the first end face of the outer sleeve 32, as long as it can be fixedly connected to the outer sleeve 32 to realize the displacement and reset of the outer sleeve 32. This application does not limit this.

[0062] For example, when the movable reset assembly 33 includes a fixed base 331, a spring 333, a slide 332, a guide rod 334, and a fixing bracket 335: it can be as follows: Figure 1 As shown, the fixing seat 331, spring 333, and slide 332 are all set on one side of the outer sleeve 32 near the beginning end. Figure 1 On the right side, the fixing bracket 335 is set on the outer wall of the inner sleeve 31, located between the inner sleeve 31 and the outer sleeve 32. The slide 332 is fixedly connected to the first end face of the outer sleeve 32. The guide rod 334 passes through the spring 333 and extends into the interior of the outer sleeve 32 to connect with the fixing bracket 335. Alternatively, the fixing bracket 331, spring 333, slide 332, guide rod 334, and fixing bracket 335 can all be set on the inner side of the outer sleeve 32.

[0063] For example, when the movable reset assembly 33 includes only the fixed base 331 and the spring 333: the fixed base 331 and the spring 333 can both be set on the side of the outer sleeve 32 near the first end, and the tail end of the spring 333 can be fixedly connected to the end face of the first end of the outer sleeve 32. Alternatively, the tail end of the spring 333 can be inserted into the interior of the outer sleeve 32 and fixedly connected to the inner wall of the outer sleeve 32. If there is one spring 333, the tail end of the spring 333 can also be sleeved and fixed to the outer wall of the outer sleeve 32. If there are two or more springs 333, the springs 333 can also be set on the outside of the outer sleeve 32, and the tail ends of the springs 333 can be fixedly connected to the outer wall of the outer sleeve 32.

[0064] In actual installation, the fixed base 331, slide 332 and fixed bracket 335 of this application can be set as one or more, just like spring 333. Whether it is one or more, as long as the corresponding function can be achieved, this application does not impose any restrictions.

[0065] As an optional solution, in the embodiments provided in this application, the fixed seat 331, the slide 332, and the fixing frame 335 are all one and are annular. In this case, the fixed seat 331 and the fixing frame 335 are coaxially sleeved on the outer wall of the inner sleeve 31, and the inner sidewalls of the fixed seat 331 and the fixing frame 335 are fixedly connected to the outer sidewall of the inner sleeve 31. The slide 332 is coaxially sleeved on the outer side of the inner sleeve 31, and there is a gap between the inner sidewall of the slide 332 and the outer sidewall of the inner sleeve 31. The tail end face of the slide 332 is coaxially fixedly connected to the head end face of the outer sleeve 32, and a plurality of sliding holes are evenly opened along the circumference of the slide 332. When there is only one spring 333, the spring 333 is coaxial with the fixed seat 331, the slide 332, and the fixed frame 335. The first end of the spring 333 is fixedly connected to the tail end face of the fixed seat 331, and the tail end of the spring 333 is fixedly connected to the first end face of the slide 332. One end of each guide rod 334 is fixedly connected to the fixed seat 331, and the other end passes through the spring 333 and the corresponding sliding hole in sequence before being fixed to the first end face or the outer wall of the fixed frame 335. When there are two or more springs 333, each spring 333 is evenly distributed along the circumference of the inner sleeve 31 between the fixed seat 331 and the slide 332. Each spring 333 corresponds to a sliding hole. One end of each guide rod 334 is fixedly connected to the fixed seat 331, and the other end passes through the corresponding spring 333 and the corresponding sliding hole in sequence before being fixedly connected to the fixed frame 335. With this configuration, only one fixed base 331, one sliding base 332, and one fixed bracket 335 are required. The structure is simple, easy to manufacture, convenient to install, and low in cost. It also allows the outer sleeve 32 to move out of position during operation and reset more smoothly after operation.

[0066] As an alternative, there are two or more fixed seats 331, slides 332, and fixing brackets 335. Each fixed seat 331, slide 332, and fixing bracket 335 is evenly distributed along the circumference of the inner sleeve 31 and has the same number as the guide rods 334. Each fixed seat 331, slide 332, fixing bracket 335, and guide rod 334 is opposite to the other. Each slide 332 has a sliding hole. When there is only one spring 333, each fixed seat 331 is evenly distributed along the circumference of the first end of the spring 333, and each slide 332 is evenly distributed along the circumference of the last end of the spring 333. One end of each guide rod 334 is fixedly connected to the corresponding fixed seat 331, and the other end passes through the sliding hole on the spring 333 and the corresponding slide 332 in sequence before being fixedly connected to the corresponding fixing bracket 335. When there are two or more springs 333, a spring 333 is provided between each fixed seat 331 and the slide 332. One end of each guide rod 334 is fixedly connected to the corresponding fixed seat 331, and the other end passes through the corresponding spring 333 and the sliding hole on the corresponding slide 332 in sequence before being fixedly connected to the corresponding fixed frame 335. In this configuration, a fixed seat 331, a spring 333, a slide 332, a guide rod 334, and a fixed frame 335 are connected to form a sub-component of the movable reset assembly 33. When two or more sub-components are evenly arranged along the circumference of the inner sleeve 31, the displacement of the outer sleeve 32 during operation and its reset after operation can be carried out smoothly.

[0067] In the above-mentioned schemes where there are two or more of the fixed seat 331, slide 332, and fixing frame 335, the fixed seat 331, slide 332, and fixing frame 335 can be block-shaped. For example, the side of the fixed seat 331 and the fixing frame 335 near the inner sleeve 31 can be set as an arc surface so that the fixed seat 331 and the fixing frame 335 fit more closely and are more firmly connected to the outer wall of the inner sleeve 31. The opposite surfaces of the fixed seat 331 and slide 332 can be set as planes to facilitate the installation of the spring 333. The fixed seat 331, slide 332, and fixing frame 335 can also be other shapes. For example, the fixing frame 335 can be set as a rod and set perpendicular to the axis of the inner sleeve 31. The shape and structure of the three are not limited, the processing technology requirements are not high, and they are easier to manufacture.

[0068] It is understandable that the fixed seat 331, slide 332, and fixed bracket 335 can be one at the same time with a through hole in the middle and sleeved on the outside of the inner sleeve 31, or there can be two or more at the same time with the same number as the guide rod 334 and evenly arranged along the circumference of the inner sleeve 31. Alternatively, one or more of the components can be ring-shaped, or one or more of the components can be two or more in other combinations, depending on the requirements. This application does not limit this, and the principle is similar regardless of the combination method, so they will not be listed one by one here.

[0069] In the above embodiments of this application, the spring 333 inside the movable reset assembly 33 is located on the side of the fixed base 331 near the second seal 35. Figure 1 On the left side of the fixed seat 331, when the outer sleeve 32 is displaced, the spring 333 is stretched. The outer sleeve 32 needs to overcome the rightward pulling force applied by the spring 333, and the outer sleeve 32 subsequently returns to its original position under the pulling force of the spring 333. Furthermore, the movable reset assembly 33 can also use the elastic force generated by the compression of the spring 333 to reset the movable part. In another embodiment provided in this application, the fixed seat 331 is located inside the outer sleeve 32, and the spring 333 is located on the side of the fixed seat 331 away from the second seal 35. The first end of the spring 333 is connected to the outer sleeve 32, and the tail end of the spring 333 is connected to the fixed seat 331. With this configuration, when the dust removal operation has not started, the spring 333 is in its original state, at which time the spring 333 is not under force; when the dust removal operation starts, the aforementioned negative pressure is generated, causing the second seal 35 to be subjected to... Figure 1 When the air pressure is applied to the left, the outer sleeve 32 moves closer to the first seal 34. At the same time, the spring 333 moves closer to the fixed seat 331 and is compressed until the second seal 35 presses against the first seal 34. When the dust removal operation ends and the negative pressure disappears, the outer sleeve 32, under the rightward restoring force generated by the compression of the spring 333, moves the second seal 35 away from the first seal 34. At the same time, the spring 333 moves away from the fixed seat 331 until it returns to its original position, and the movable part of the pipe sealing assembly 3 resets. Understandably, in this case, if a slide block 332, a guide rod 334, and a fixing bracket 335 are provided, the slide block 332 can be fixed to the tail end face of the outer sleeve 32, and the fixing bracket 335 can be fixed to the outer wall of the inner sleeve 31 and the side of the slide block 332 away from the second seal 35. Alternatively, all three can be provided inside the outer sleeve 32, or other arrangements can be made. This application does not limit these arrangements.

[0070] In the embodiments provided in this application, the pipe sealing assembly further includes a third seal 36 and a fourth seal 37. The third seal 36 is disposed around the outer side wall of the inner sleeve 31, and the fourth seal 37 is disposed around the inner side wall of the outer sleeve 32. Both the third seal 36 and the fourth seal 37 are annular structures. The third seal 36 is located on the side of the fourth seal 37 closer to the second seal 35. When the second seal 35 is pressed against or away from the first seal 34, the fourth seal 37 is correspondingly pressed against or away from the third seal 36. With this configuration, when the dust removal operation is started and the second seal 35 has not yet moved towards the first seal 34, a labyrinth-like structure is formed between the third seal 36, the fourth seal 37, the inner sleeve 31, and the outer sleeve 32. This reduces the leakage of dust from inside the inner sleeve 31 to the outside through the gap between the inner sleeve 31 and the outer sleeve 32, while also reducing the intake of outside air through this gap, thus creating a more stable negative pressure environment. When the dust removal operation is started and the second seal 35 presses against the first seal 34, the fourth seal 37 presses against the third seal 36, preventing dust from inside the inner sleeve 31 from leaking out through the gap between the inner sleeve 31 and the outer sleeve 32, thus improving dust removal efficiency. At the same time, it prevents the intake of outside air through this gap, without adding extra burden to the dust removal system.

[0071] Understandably, when not in operation, the distance between the third seal 36 and the fourth seal 37 should be equal to the distance between the first seal 34 and the second seal 35, so that when the second seal 35 presses against the first seal 34, the fourth seal 37 can correspondingly press against the third seal 36.

[0072] In actual installation, the shapes of the first sealing element 34, the second sealing element 35, the third sealing element 36, and the fourth sealing element 37 are not limited. For example, they can be circular cylindrical structures or circular prismatic structures. As long as there is an installation hole in the middle, it can be installed on the corresponding sleeve or pipe side wall, and the end face areas of the two pairs of corresponding end faces are large enough to be pressed and sealed.

[0073] In the embodiments provided in this application, both the third sealing element 36 and the fourth sealing element 37 are annular. The third sealing element 36 is sleeved on the outer wall of the inner sleeve 31, and the fourth sealing element 37 is coaxially disposed on the inner wall of the outer sleeve 32. The inner diameter of the fourth sealing element 37 is smaller than the outer diameter of the third sealing element 36, while the outer diameter of the fourth sealing element 37 is larger than the outer diameter of the third sealing element 36. This allows the fourth sealing element 37 to fit snugly against the third sealing element 36, sealing the gap between the inner sleeve 31 and the outer sleeve 32, and preventing the outer sleeve 32 from contacting and rubbing against the third sealing element 36 during movement. The inner diameter of the fourth sealing element 37 is larger than the outer diameter of the inner sleeve 31, preventing the fourth sealing element 37 from contacting and rubbing against the inner sleeve 31 during movement. With this configuration, when the fourth sealing element 37 moves toward the third sealing element 36, it can press against the third sealing element 36 and completely seal the gap between the inner sleeve 31 and the outer sleeve 32.

[0074] In the embodiments provided in this application, both the first sealing element 34 and the second sealing element 35 are flanges, and a sealing gasket 38 is provided on the first end face of the first sealing element 34. It is understood that the inner diameter of the second sealing element 35 should be smaller than the outer diameter of the first sealing element 34 and larger than the inner diameter of the first sealing element 34, so that when the second sealing element 35 moves toward the first sealing element 34, it can press against the first sealing element 34 and seal it.

[0075] In this embodiment, the first sealing element 34 and the second sealing element 35 are configured as flanges, which facilitates installation and disassembly, improves sealing performance, and reduces manufacturing costs. The connection between the first sealing element 34, the second sealing element 35 and the corresponding pipe or sleeve can be a threaded connection or a welded connection, as long as it is a fixed connection method, this application does not impose any restrictions on this.

[0076] The sealing gasket 38 enhances the sealing effect between the first seal 34 and the second seal 35, and reduces wear that may occur when they come into contact. Understandably, the sealing gasket 38 is positioned on the first seal 34 to ideally cover the contact surface between the first seal 34 and the second seal 35, in order to better reduce wear and improve the sealing effect.

[0077] In addition, the sealing gasket 38 can also be disposed on the tail end face of the second sealing element 35. As for the specific location of the sealing gasket 38, this application does not limit it, as long as it can improve the sealing effect and reduce contact wear between the sealing elements.

[0078] To ensure that the first seal 34 and the second seal 35 automatically abut against each other under the action of pressure difference, the area S of the first end face of the second seal 35 and the stiffness coefficient k of the spring 333 can be designed.

[0079] In the embodiments provided in this application, the stiffness coefficient k of the spring 333 is:

[0080] k=f1 / ΔL

[0081] Wherein, f1 is the frictional force experienced by the outer sleeve 32 during movement, which needs to be obtained through experimental testing; ΔL is the width of the gap between the first seal 34 and the second seal 35 when the outer sleeve 32 is reset.

[0082] Before starting the dust removal operation, the moving collection hood aligns the moving end pipe 4 with the fixed end pipe 2, and there is a safe distance between the second seal 35 and the first seal 34, which is ΔL.

[0083] When dust removal operation is started, the dust collector connected to the fixed end pipe 2 is inside the inner sleeve 31. Figure 1 Area A, the interior of fixed-end pipe 2, i.e. Figure 1 Area B, the gap between the first seal 34 and the second seal 35, is... Figure 1 Negative pressure is generated in region C, and one side of the first end face of the second seal 35 is... Figure 1 The air pressure in region D is atmospheric pressure, and a pressure difference ΔP is generated inside and outside, so that the second seal 35 is subjected to a leftward thrust F = ΔP × S. The thrust F generated by the negative pressure should be able to overcome the frictional force f1 and the tension f2 of the spring 333 that the moving part of the pipe sealing assembly experiences during the leftward movement, so F ≥ (f1 + f2).

[0084] When the dust removal operation is completed, the dust collector stops working, the negative pressure in areas A, B, and C disappears, and atmospheric pressure replaces it, the internal and external air pressures are balanced, the thrust F disappears, and under the action of the pulling force f2 applied to the moving part by spring 333, the moving part moves to the right until it returns to its original position. In order for the moving part to return to its original position smoothly, the pulling force f2 should be able to overcome the frictional force experienced by the moving part during its rightward movement.

[0085] The frictional force experienced by the moving part during its movement includes the frictional force applied to the slide block 332 by the guide rod 334, as well as other possible moving frictional forces, such as the contact frictional force caused by the installation error between the fourth seal 37 and the inner sleeve 31. This application assumes that the frictional force experienced by the moving part during leftward and rightward movement is the same, thus the frictional force experienced by the moving part during rightward movement is equal to f1. Based on the previous assumption, for the spring 333 to return the moving part to its original position when not in operation, the pulling force f2 should be greater than or equal to the resistance force f1. Therefore, f2 = f1 can be taken. Since f2 = k × ΔL, k = f1 / ΔL.

[0086] Therefore, it can be assumed that the thrust F generated by the negative pressure is greater than or equal to 2f², thus the area S of the first end face of the second seal 35 is greater than or equal to 2f² / ΔP, or S is greater than or equal to 2(k×ΔL) / ΔP. Here, ΔP is the air pressure difference between the first and last end faces of the second seal 35 when the outer sleeve 32 moves toward the first seal 34. It is equal to the difference between the negative pressure generated by the dust collector connected to the fixed end pipe 2 and the atmospheric pressure, and can be calculated based on the designed negative pressure value of the dust collector connected to the fixed end pipe 2.

[0087] The stiffness coefficient k of the spring 333 and the area S of the first end face of the second seal 35, as determined by the above design, enable the pipe sealing assembly provided in this application to automatically seal when the dust removal operation is started and automatically unseal when the dust removal operation is finished.

[0088] The working principle of the pipe sealing assembly provided in the embodiments of this application is explained below with reference to the accompanying drawings:

[0089] First, the pipe sealing assembly provided in this application is installed in the mobile dust collection device. Specifically, the first sealing element 34 is sleeved and fixed on the fixed end pipe 2, and the inner sleeve 31 is connected to the mobile end pipe 4. At this time, the dust removal operation has not yet been started, and the spring 333 of the pipe sealing assembly is in normal condition.

[0090] Then, based on the fixed position of the fixed end pipe 2, the capture cover is moved so that the moving end pipe 4 is coaxial with the fixed end pipe 2. At the same time, the distance between the second seal 35 and the first seal 34 is within the safe distance ΔL. At this time, the capture cover and its connected moving end pipe 4 can move freely without colliding with the fixed end pipe 2.

[0091] Next, the dust removal operation is started. Negative pressure is generated inside the fixed end pipe 2, inside the inner sleeve 31, and in the gap between the first seal 34 and the second seal 35. The outer side of the outer sleeve 32 is at atmospheric pressure. The pressure difference between the inside and outside causes the second seal 35 to be pushed to the left. The second seal 35, the outer sleeve 32, and the slide 332 move steadily to the left along the guide rod 334 until the second seal 35 presses against the first seal 34. At the same time, the fourth seal 37 presses against the third seal 36. At this time, the fixed end pipe 2 and the moving end pipe 4 are connected and sealed. There is no air leakage or intake of clean air in the gaps between the first seal 34 and the second seal 35 and between the inner sleeve 31 and the outer sleeve 32, so the dust removal operation can be carried out efficiently. It can be seen that when the dust removal operation is started, the pipe sealing assembly provided in this application can achieve automatic sealing between the fixed end pipe 2 and the moving end pipe 4.

[0092] Finally, when the dust removal operation ends, the negative pressure environment inside the fixed end pipe 2, inside the inner sleeve 31, and in the gap between the first seal 34 and the second seal 35 disappears, the internal and external air pressures are balanced, the second seal 35 is no longer subjected to thrust, and the movable part moves steadily to the right along the guide rod 334 under the pulling force applied by the spring 333. The second seal 35 moves away from the first seal 34, and the fourth seal 37 moves away from the third seal 36 until it is reset. At this time, the spring 333 returns to its original state, and the distance between the second seal 35 and the first seal 34 returns to a safe distance. It can be seen that when the dust removal operation ends, the pipe sealing assembly provided in this application can realize the automatic unsealing between the fixed end pipe 2 and the movable end pipe 4, so that the collection hood connected to the movable end pipe 4 is in a freely movable state.

[0093] Throughout the entire operation of the pipe sealing assembly provided in this application embodiment, it can achieve automatic connection and stable sealing between the mobile end pipe 4 and the fixed end pipe 2 of the mobile dust collection device when the dust removal operation is started, without relying on the movement of the collection hood, and automatically deseal the mobile end pipe 4 and the fixed end pipe 2 when the dust removal operation ends, so that the collection hood can be restored to a freely movable state. It has high working efficiency, low safety risk and convenient operation.

[0094] The pipe sealing assembly provided in this application is used for sealing between the mobile end pipe 4 and the fixed end pipe 2 of a mobile dust collection device. In addition, embodiments of this application also provide a mobile dust collection device equipped with the aforementioned pipe sealing assembly.

[0095] Please continue to refer to this. Figure 2 , Figure 2 This is a schematic diagram of the structure of the mobile smoke and dust collection device provided in the embodiments of this application.

[0096] In this embodiment, the mobile dust collection device includes a collection hood 7, which is connected to the first end of the mobile end pipe 4, and a dust collector is connected to the last end of the fixed end pipe 2. The mobile dust collection device also includes a support 5, a traveling mechanism 6, and a pipe sealing assembly 3; the collection hood 7 is fixed on the support 5, and the traveling mechanism 6 is located at the bottom of the support 5.

[0097] The mobile dust collection device provided in this application, by installing the aforementioned pipe sealing component 3, only requires moving the mobile end pipe 4 to a safe distance and aligning it with the fixed end pipe 2 before the dust removal operation begins. This allows for automatic connection and sealing between the fixed end pipe 2 and the mobile end pipe 4 when the dust removal operation begins, preventing air leakage between the mobile end pipe 4 and the fixed end pipe 2 during the dust removal process, thus avoiding airflow loss and dust leakage and improving dust removal efficiency. At the same time, it prevents clean air from being drawn into the gap between the mobile end pipe 4 and the fixed end pipe 2 during the dust removal process, avoiding additional burden on the dust collector, reducing system energy consumption, and automatically disconnecting the connection between the fixed end pipe 2 and the mobile end pipe 4 and desealing it when the dust removal operation ends. This allows the collection hood 7 to return to a freely movable state without needing to be moved, improving work efficiency, reducing safety risks, and providing convenient operation.

[0098] In the mobile dust collection device provided in this application, the area of ​​the collection hood 7 covers the working area of ​​the workstation, and the collection hood 7 is used to collect dust; the air outlet of the collection hood 7 is connected to the air inlet of the mobile end pipe 4, and the collection hood 7 sends the collected dust into the mobile end pipe 4.

[0099] As mentioned above, the inner sleeve 31 of the pipe sealing assembly 3 can be set independently of the mobile end pipe 4, or it can be part of the mobile end pipe 4. When the two are set independently, the air outlet end of the mobile end pipe 4 is connected to the inner sleeve 31 of the pipe sealing assembly 3. There are various ways to connect the two. For example, they can be connected by a connecting flange 8, or by welding, or by other connection methods. This application does not limit these methods.

[0100] The mobile end pipe 4 sends the received smoke and dust into the fixed end pipe 2 through the inner sleeve 31. The air outlet of the fixed end pipe 2 is connected to the air inlet pipe of the dust collector. The first seal 34 of the pipe sealing assembly is installed at the air inlet of the fixed end pipe 2.

[0101] The trapping hood 7 is mounted on the bracket 5, which supports the trapping hood 7 and the connected mobile end pipe 4. The specific structure of the bracket 5 is not limited, as long as it can support the mobile end pipe 4 and the trapping hood 7.

[0102] The support 5 is mounted on the traveling mechanism 6. The moving end pipe 4, the collecting hood 7, and the support 5 can move with the traveling mechanism 6. When the collecting hood 7 moves to the working area of ​​the station, the moving end pipe 4 and the fixed end pipe 2 are coaxial. A safety distance ΔL is reserved between the first sealing element 34 and the second sealing element 35, where ΔL is between 50mm and 100mm. In actual installation, the specific structural form of the traveling mechanism 6 is not limited. For example, it can be a structure with multiple traveling wheels as described in this application, and corresponding tracks can be laid under the support 5. The collecting hood 7, the moving end pipe 4, and the support 5 can move on the tracks via the traveling mechanism 6. Other structures are also acceptable, as long as they enable movement.

[0103] To facilitate airflow adjustment, a flow control valve 1 is also installed on the fixed end pipe 2 in this embodiment of the application, and the airflow can be adjusted by the flow control valve 1.

[0104] When the collection hood 7 is in the working position, the moving end pipe 4 and the fixed end pipe 2 are coaxial, and the first seal 34 and the second seal 35 on the pipe sealing assembly 3 are in a separated state. At this time, the flow control valve 1 is opened, and under the action of the negative pressure of the dust collector, the smoke and dust are collected by the collection hood 7 and sent into the moving end pipe 4, and then sent into the fixed end pipe 2 through the inner sleeve 31, and finally sent into the dust collector through the fixed end pipe 2. Simultaneously, a large amount of airflow flows into the fixed end pipe 2 through the gap between the first seal 34 and the second seal 35. According to Bernoulli's principle, the high-speed airflow causes a negative pressure zone C to be formed in the gap between the first seal 34 and the second seal 35. At this time, one side of the second seal 35 is an atmospheric pressure zone and the other side is a negative pressure zone. The pressure difference between the two sides pushes the second seal 35 and the outer sleeve 32, slide 332, and fourth seal 37 fixed thereto towards the first seal 34 until the second seal 35 presses the first seal 34 to form a seal with good sealing performance. At the same time, the fourth seal 37 presses the third seal 36 to prevent airflow leakage from the gap between the inner sleeve 31 and the outer sleeve 32.

[0105] This application also provides a method for using a mobile smoke and dust collection device, specifically including:

[0106] The walking mechanism 6 is controlled to move, driving the support 5, the moving end pipe 4, and the collection cover 7 to move until the moving end pipe 4 and the fixed end pipe 2 are coaxial and the distance between the second seal 35 and the first seal 34 is a safe distance; wherein, the safe distance is 50mm to 100mm;

[0107] When the dust collector is turned on, negative pressure is generated inside the fixed end pipe 2, inside the inner sleeve 31, and in the gap between the first seal 34 and the second seal 35. The second seal 35 is pushed, and under the action of the push, the second seal 35 moves toward the first seal 34 until it presses against the first seal 34.

[0108] After the dust removal operation is completed, the dust collector is turned off. The negative pressure inside the fixed end pipe 2, inside the inner sleeve 31, and in the gap between the first seal 34 and the second seal 35 all disappear. The moving reset component 33 controls the outer sleeve 32 to reset, and the second seal 35 leaves the first seal 34.

[0109] As can be seen, the pipe sealing assembly 3 provided in this application embodiment utilizes the pressure difference caused by the different airflow velocities on both sides of an object to control the expansion and contraction of the pipe sealing assembly 3, thereby achieving automatic sealing and desealing of the pipe. This eliminates the need for complex electric or pneumatic actuators to move the pipe sealing assembly 3, resulting in a simple structure and convenient operation. In the working state, the first sealing element 34 and the second sealing element 35 automatically form a complete seal, preventing air leakage and improving dust removal efficiency. Simultaneously, it prevents the intake of clean air, reducing the burden on the dust collector and lowering system energy consumption. In the non-working state, the first sealing element 34 and the second sealing element 35 automatically separate, providing sufficient safety clearance between the moving end pipe 4 and the fixed end pipe 2 connected to the collection hood 7. This allows the collection hood 7 to move freely along or perpendicular to the axis of the fixed end pipe 2. Both the sealing and desealing processes are automatically achieved without moving the collection hood 7, and after desealing, the collection hood 7 can be moved freely without further movement, improving work efficiency, reducing safety risks, and ensuring convenient operation.

[0110] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the apparatus and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A pipe sealing assembly for sealing between a mobile end pipe (4) and a fixed end pipe (2) of a mobile dust collection device, characterized in that, include: Inner sleeve (31), outer sleeve (32), movable reset assembly (33), first seal (34), second seal (35); The outer sleeve (32) is sleeved on the outside of the inner sleeve (31), the movable reset assembly (33) is disposed on the outside of the inner sleeve (31), the outer sleeve (32) is connected to the movable reset assembly (33), the first end of the inner sleeve (31) is connected to the tail end of the movable end pipe (4) or is the tail end of the movable end pipe (4), the second sealing member (35) is disposed around the tail end of the outer sleeve (32), and the first sealing member (34) is disposed around the first end of the fixed end pipe (2); When a negative pressure is generated inside the inner sleeve (31), the second seal (35) can drive the outer sleeve (32) to move toward the first seal (34) and press the first seal (34). The moving reset assembly (33) is used to control the reset of the outer sleeve (32). The movable reset assembly (33) includes a fixed base (331) and a spring (333); The fixing seat (331) is fixed to the outer wall of the inner sleeve (31), and the spring (333) is located on the side of the fixing seat (331) near the second seal (35). The first end of the spring (333) is connected to the fixing seat (331), and the tail end of the spring (333) is connected to the outer sleeve (32).

2. The pipe sealing assembly according to claim 1, characterized in that, The movable reset assembly (33) also includes a slide (332) and a guide rod (334); The slide block (332) is located outside the inner sleeve (31). One end of the slide block (332) is connected to the tail end of the spring (333), and the other end of the slide block (332) is connected to the outer sleeve (32). One end of the guide rod (334) is connected to the fixed seat (331), and the other end of the guide rod (334) passes through the spring (333) and the slide block (332) in sequence.

3. The pipe sealing assembly according to claim 2, characterized in that, The number of springs (333) and guide rods (334) is the same, and there are several of each. The slide block (332) is located on the side of the spring (333) near the second seal (35). The slide block (332) has the same number of sliding holes as the spring (333). Several springs (333) are evenly distributed circumferentially along the outer side of the inner sleeve (31). Each guide rod (334) corresponds to the spring (333) and the sliding hole. The guide rod (334) passes through the corresponding spring (333) and the corresponding sliding hole in sequence.

4. The pipe sealing assembly according to claim 2, characterized in that, The movable reset assembly (33) also includes a mounting bracket (335); The fixing bracket (335) is fixed to the outer wall of the inner sleeve (31). The fixing bracket (335) is located on the side of the slide (332) near the second seal (35). The guide rod (334) passes through the slide (332) and is fixedly connected to the fixing bracket (335).

5. The pipe sealing assembly according to any one of claims 1-4, characterized in that, Also includes: Third seal (36), fourth seal (37); The third seal (36) is disposed around the outer side wall of the inner sleeve (31), and the fourth seal (37) is disposed around the inner side wall of the outer sleeve (32). The third seal (36) is located on the side of the fourth seal (37) closer to the second seal (35). When the second seal (35) presses against or moves away from the first seal (34), the fourth seal (37) presses against or moves away from the third seal (36) accordingly.

6. The pipe sealing assembly according to any one of claims 1 to 4, characterized in that, Both the first sealing element (34) and the second sealing element (35) are flanges, and a sealing gasket (38) is provided on the first end face of the first sealing element (34) or the tail end face of the second sealing element (35).

7. The pipe sealing assembly according to any one of claims 1 to 4, characterized in that, The stiffness coefficient k of the spring (333) is: ； Wherein, f1 is the frictional force experienced by the outer sleeve (32) during its movement; The width of the gap between the first seal (34) and the second seal (35) when the outer sleeve (32) is reset; The area S of the first end face of the second seal (35) satisfies: ； in, The pressure difference between the first end face and the last end face of the second seal (35) when the outer sleeve (32) moves toward the first seal (34).

8. A mobile dust collection device, comprising a collection hood (7), wherein the collection hood (7) is connected to the first end of the mobile end pipe (4), and the tail end of the fixed end pipe (2) is connected to a dust collector, characterized in that, Also includes: Support (5), walking mechanism (6), pipe sealing assembly (3) according to any one of claims 1 to 7; The trapping hood (7) is fixed on the bracket (5), and the walking mechanism (6) is located at the bottom of the bracket (5).

9. A method of using the mobile dust collection device according to claim 8, characterized in that, include: Control the walking mechanism (6) to walk, drive the bracket (5), the moving end pipe (4), and the trap (7) to move until the moving end pipe (4) and the fixed end pipe (2) are coaxial and the distance between the second seal (35) and the first seal (34) is a safe distance; When the dust collector is turned on, negative pressure is generated inside the fixed end pipe (2), inside the inner sleeve (31), and in the gap between the first seal (34) and the second seal (35). The second seal (35) is subjected to thrust. Under the action of the thrust, the second seal (35) moves toward the first seal (34) until it presses against the first seal (34). After the dust removal operation is completed, the dust collector is turned off. The negative pressure inside the fixed end pipe (2), inside the inner sleeve (31), and in the gap between the first seal (34) and the second seal (35) disappears. The moving reset component (33) controls the outer sleeve (32) to reset, and the second seal (35) leaves the first seal (34).

Images