Multi-stage telescopic explosion purging environment-friendly noise-reduction dust collection device

Abstract

In order to solve the problems of impurity splashing, noise and the like easily generated during blasting purging of a pipeline, the invention provides a multi-stage telescopic type environment-friendly noise-reducing dust collection device for blasting purging, the device comprises multiple groups of split shells and a group of fixed shells which are sequentially connected in a sliding and sleeving manner, one end of each fixed shell is provided with a cover, and the other end of each fixed shell is open; the split type shells are distributed in a penetrating mode in the blasting purging airflow direction, and the cross sections of the multiple sets of split type shells and the cross sections of the fixed shells are gradually increased in the blasting purging airflow direction. One end of the connecting bracket is connected with the split shell, and the other end is connected with a pipe hoop; the elastic baffles are arranged in the fixed shell and the split type shell, a rotary reset device is connected between the elastic baffles and the fixed shell or the split type shell, and the multiple sets of elastic baffles are sequentially distributed in an up-down staggered mode in the airflow direction; and the filter screen is arranged in a gap between every two adjacent shells, the impact force of blasting purging airflow can be effectively reduced through the multi-stage telescopic shells, the blasting purging airflow is filtered, noise is reduced, and the construction operation environment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal for chemical plants, and in particular to a multi-stage telescopic blasting and blowing environment-friendly noise-reducing dust collecting device. Background Art

[0002] Before the first start-up of a petrochemical plant, in order to ensure the cleanliness of the inside of the pipeline and prevent dust, rust, welding slag and other debris inside the pipeline from clogging the pipeline, jamming the valves and even damaging the equipment during operation, a pipeline cleaning or purging process is required before the pipeline construction is completed and put into production.

[0003] For pipes with a nominal diameter greater than or equal to DN600, manual entry is generally used to clean the inside of the pipe; for pipes with a nominal diameter less than or equal to DN100, compressed air is generally introduced into the pipe after closing the valve, and then the valve is opened to release the pressure for air blowing; for pipes with a nominal diameter between DN150 and DN550, air blasting and blowing is generally performed by adding bursting discs (generally asbestos boards).

[0004] Air blasting and purging usually starts with adjusting the pipeline purging process, then installing a matching flange on the end flange of the purged pipeline, adding an asbestos board as a bursting disc between the two flanges, and forming a closed space in the purged pipeline; continuously introducing compressed air through appropriate interfaces such as temperature or pressure instruments on the pipeline, and when the air pressure in the closed space of the pipeline gradually increases to exceed the limit pressure that the bursting disc can withstand, the bursting disc will suddenly rupture, and the compressed air in the pipeline will expand rapidly and spray out from the bursting port at high speed; at the same time, dust, rust, welding slag and other debris in the pipeline will be discharged from the bursting port under the purging of high-speed airflow. Repeated blasting and purging can meet the standard requirements for internal pipeline cleaning.

[0005] The above process will generate a large amount of dust, rust, welding slag, etc., which will have a certain pollution impact on the air and equipment facilities within 20 meters in front of the pipeline. The noise generated will also have a relatively large impact on the surrounding personnel. In this process, a cordon needs to be set up, and guardians need to be assigned to prevent unrelated personnel from entering the blasting and purge area, and operators need to wear earplugs, masks and other protective measures. Summary of the invention

[0006] In order to solve the problems of impurity splashing and noise generated during blasting and blowing of pipelines, the present invention provides an environmentally friendly noise reduction and dust collection device for multi-stage retractable blasting and blowing, and the technical solution adopted is as follows: The multi-stage retractable blasting and blowing environmentally friendly noise reduction dust collection device is characterized by comprising: A fixed shell having a cover at one end along the length of the blasting and purge pipeline and an opening at the other end; A split housing is provided with multiple groups, and the split housings are distributed throughout along the direction of the blasting purge airflow. Two adjacent groups of split housings can be connected by sliding sleeves along the direction of the blasting purge airflow. A group of split housings close to the fixed housing is slidably connected to the inside of the fixed housing, and the cross-sections of the multiple groups of split housings and the fixed housings gradually increase in the direction of the blasting purge airflow. A connecting bracket, one end of which in the horizontal direction is connected to a split housing close to one end of a blasting and purge pipeline, and the other end of which is connected to a pipe clamp for connecting to the blasting and purge pipeline; The elastic baffle is arranged inside the fixed shell and the split shell, and a rotation reset device is connected between the elastic baffle and the fixed shell or the split shell to rotate and reset along the blasting purge airflow direction, and the elastic baffles between the fixed shell and the split shell and between adjacent split shells are staggered up and down; The filter screen is fixedly connected to the gap between the fixed shell and the split shell and the gap between two adjacent groups of split shells.

[0007] Furthermore, the connecting bracket is composed of a horizontal plate, a fixed column, a sliding column, and a connecting rod. The fixed column is fixedly connected to one end of the horizontal plate. The horizontal plate is provided with long holes distributed along the length direction of the blasting and purge pipeline. The sliding column is slidably connected to the long holes, and the pipe clamp is fixedly connected to the sliding column. The connecting rod is fixedly connected to the fixed column and one end in the length direction is fixedly connected to the sliding column, and the other end is rotatably connected to the split shell.

[0008] Furthermore, a telescopic spring is connected between the connecting rod and the sliding column, and the length of the telescopic spring is distributed along a direction parallel to the length of the long hole.

[0009] Furthermore, the rotational reset device includes a rotating shaft and a reset spring, the elastic baffle is rotationally connected to the fixed shell or the split shell through the rotating shaft, the reset spring is sleeved on the rotating shaft and the two ends are respectively fixedly connected to the elastic baffle and the fixed shell or the split shell.

[0010] Furthermore, first pin holes correspondingly distributed in positions are provided between the fixed shell and the split shell, and between two adjacent groups of split shells, for fixing in a fully extended state.

[0011] Furthermore, a second pin hole is provided on the split housing near one end of the blasting and purge pipeline, and the second pin hole is distributed correspondingly to the position of the first pin hole on the fixed housing for fixing in a fully retracted state.

[0012] Furthermore, a retractable handle is fixedly connected to the top of the fixed shell.

[0013] Furthermore, a retractable leg is fixedly connected below the fixed shell, and a universal wheel is installed below the retractable leg.

[0014] Furthermore, an impurity discharge port is also provided at the lower end of the telescopic shell.

[0015] Furthermore, sound insulation cotton is fixedly connected to the inner wall of the fixed shell.

[0016] The beneficial effects of the present invention are: 1. This device uses a multi-stage retractable shell to filter the blasting purge airflow. Each shell is equipped with an elastic baffle, and the elastic baffle is staggered up and down to effectively reduce the impact of the blasting purge airflow. In addition, the filter screen set in the gap between each split shell is used to filter and discharge the airflow, realizing multi-stage pressure reduction filtration, which can control the debris generated by blasting purge within a certain space range or minimize the impact range, while reducing the noise generated during blasting purge, protecting the environment, and improving the level of standardized operation on site; 2. Each split shell and the fixed shell are connected in sequence, and present a structure with a gradually expanding cross section, so as to adapt to the gradual diffusion trend of the blasting purge airflow when it is ejected from the pipeline, thereby reducing the impact force of the blasting purge airflow; 3. The blasting purge pipeline is connected to the first split housing through the connecting bracket. The distance between the blasting purge pipeline and the inlet of the first split housing can be adjusted by sliding the sliding column along the connecting plate, so as to adapt to different operating environments. In addition, a telescopic spring is arranged between the sliding column and the fixed column to reduce the influence of the pipeline string movement caused by the impact force of the blasting purge airflow, thereby ensuring the stability of the overall structure during use; 4. A rotating reset device is arranged between the elastic baffle and the shell, which can effectively avoid the problem of damage to the elastic baffle or other structures inside the shell due to excessive instantaneous airflow impact, and the elastic baffle can be automatically reset; 5. By setting correspondingly distributed pin holes between the shells, the overall structure can be in a fully extended state and a fully retracted state. In the fully extended state, it can adapt to a greater impact force of the blasting and purge airflow, and in the fully retracted state, it can adapt to a narrow working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the present invention in a fully extended state. Figure 2 Schematic diagram of the connecting bracket structure Figure 3 Schematic diagram of the connection structure between the elastic baffle and the rotation reset device Figure 4 This is a schematic diagram of the structure of the present invention in a fully compressed state. in: 1- Explosion and purge pipeline; 2-connecting bracket, 201-upper connecting plate, 202-lower connecting plate, 203-fixed column, 204-sliding column, 205-long hole, 206-connecting rod, 207-telescopic spring; 3- pipe clamp; 4-first split housing, 401-first guide rail, 402-rotating shaft; 5-second split housing, 501-second guide rail; 6-third split housing, 602-third guide rail; 7-fixed housing, 701-fourth guide rail, 702-impurity discharge port, 703-retractable handle, 704-retractable legs, 705-universal wheel; 8- elastic baffle; 9-rotating shaft, 10-return spring, 11-filter screen, 12-first pin hole, 13-second pin hole. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0019] In the description of the invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the viewing direction or positional relationships and are only for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0020] like Figure 1The multi-stage retractable blasting and purge environmentally friendly noise reduction dust collecting device shown comprises a connecting bracket 2, a pipe clamp 3, a first split shell 4, a second split shell 5, a third split shell 6 and a fixed shell 7 connected in sequence, the left and right ends of the connecting bracket 2 are respectively connected to the pipe clamp and the first split shell 4, the three groups of split shells 4 are connected in pairs by a retractable guide rail, the third split shell 6 is slidably sleeved in the fixed shell 7 by a retractable guide rail, and elastic baffles 8 are arranged inside the three groups of split shells and the fixed shell 7, and the elastic baffles 8 between the two adjacent shells are staggered up and down. In the initial state, the elastic baffles 8 are in a vertical state, that is, they are perpendicular to the airflow direction of the blasting and purge pipeline 1. A rotation resetting device is connected between the elastic baffle 8 and the split shell and the fixed shell 7. Under the impact of the blasting and purge airflow, the elastic baffle 8 can rotate.

[0021] Specifically, Figure 1 As shown, the left and right ends of the first split housing 4, the second split housing 5, and the third split housing 6 are all through-distributed, the left opening of the fixed housing 7 has a cover on the right end, the cross-sections of the first split housing 4, the second split housing 5, the third split housing 6 and the fixed housing 7 gradually increase, and the first guide rail 401, the second guide rail 501, the third guide rail 601, and the fourth guide rail 701 are fixedly connected to the inner walls of the four groups of housings respectively, the first guide rail 401 can be slidably connected to the inside of the second guide rail 501, and the second guide rail 501 can be slidably connected to the left and right sides. The third guide rail 601 is slidably connected to the inside of the fourth guide rail 701, thereby forming a four-stage telescopic guide rail, so that the adjacent split shells and the third split shell 6 are slidably connected to the fixed shell 7; and the right side of the first split shell 4 and the left side of the second split shell 5, the right side of the second split shell 5 and the left side of the third split shell 6, and the right side of the third split shell 6 and the left side of the fixed shell 7 are all provided with first pin holes 12 distributed in corresponding positions. When stretched to the Figure 1 In the state shown, the first pin holes 12 between the two shells are distributed correspondingly and fixed by positioning pins, so as to fix the length of the overall structure and avoid displacement of the shells during the blasting and purging process to cause damage.

[0022] like Figure 3As shown, the rotation reset device includes a rotating shaft 9 and a reset spring 10. The rotating shaft 9 is rotatably connected to the internal upper wall or lower wall of each split shell and the fixed shell, and its axis is distributed along the front-to-back direction. The reset spring 10 is a torsion spring, which is sleeved on the rotating shaft 9 and has two ends fixedly connected to the elastic baffle 8 and each shell, respectively. In the initial state, the elastic baffle 8 is in a vertical state. At this time, the blasting purge airflow is perpendicular to the elastic baffle 8. When the blasting purge starts, under the impact of the airflow, the elastic baffle 8 is forced to drive the reset spring 10 to deform, and the elastic baffle 8 rotates along the rotating shaft 9. After the blasting purge airflow passes through, the elastic baffle 8 is reset under the action of the reset spring 10. In addition, multiple groups of elastic baffles 8 are arranged in an up-and-down staggered manner to prevent impurities and dust generated by the blasting from overflowing again, thereby playing a role in dust collection.

[0023] like Figure 1-Figure 2 As shown, the connecting bracket 2 is provided with two groups, each of which is composed of an upper connecting plate 201, a lower connecting plate 202, a fixed column 203, a sliding column 204, a connecting rod 206, and a telescopic spring 207. The upper connecting plate 201 is parallelly distributed above the lower connecting plate 202, and the lengths of both are horizontally distributed in the left-right direction. The right sides of the upper connecting plate 201 and the lower connecting plate 202 are provided with long holes 205 correspondingly distributed in the position, and the lengths of the long holes 205 are distributed along the length direction of each connecting plate. The fixed column 203 is fixedly connected At the left end between the upper connecting plate 201 and the lower connecting plate 202, the sliding column 204 passes through the two long holes 205 in the vertical direction and is slidably connected to the two long holes 205 left and right. The sliding column 204 is fixedly connected to the pipe clamp 3. The length of the connecting rod 206 is horizontally distributed along the left and right directions and is fixedly connected to the fixed column 203. A group of rotating shafts 402 are rotatably connected at both ends of the left side of the first split shell 4. The left end of the connecting rod 206 is fixedly connected to the sliding column 204 through a telescopic spring 207, and the right end is fixedly connected to the rotating shaft 402.

[0024] The connecting bracket 2 can connect the blasting and purge pipeline 1 with the first split shell 4, and the connecting bracket 2 and the first split shell 4 can be rotated through the rotating shaft 402, so as to facilitate the connection of the first split shell 4 with the blasting and purge pipeline 1 under different construction environments; the horizontal spacing between the blasting and purge pipeline 1 and the first split shell 4 can be adjusted by the sliding of the sliding column 204 and the long hole 205, and the clamping force between the two can be adaptively adjusted in combination with the telescopic spring 207, and the telescopic spring 207 can provide a certain degree of buffering to avoid the blasting and purge pipeline 1 from being swayed due to excessive impact force of the airflow in the blasting and purge pipeline 1.

[0025] Furthermore, it should be noted that, in this embodiment, Figure 1In the viewing state, that is, when the first split shell 4 and the second split shell 5 are fixed by the positioning pins, the right end of the first split shell 4 is located on the left side of the elastic baffle 8 inside the second split shell 5 to ensure that the elastic baffle 8 is in a vertical distribution state. The same applies to the other two adjacent shells, which will not be elaborated here.

[0026] like Figure 1 As shown, a retractable handle 703 is fixedly connected to the top of the fixed shell 7, and a retractable leg 704 is connected to the bottom to adjust the height of the overall structure. A universal wheel 705 is installed below the retractable leg 704. When the impact force of the airflow is too large, the shell can be driven to move to the right by the universal wheel 705, and at the same time, it can be stretched and buffered by the retractable spring 207; the lower part of the fixed shell 7 is an inverted funnel-shaped structure, and an impurity discharge port 702 is provided at the lower end to discharge the collected impurities, and sound insulation cotton is provided on the inner wall of the fixed shell 7 to reduce the noise pollution of the blasting and purge airflow.

[0027] In this embodiment, a second pin hole 13 is further provided on the left side of the first split housing 4. When the housings slide and compress against each other to the position as shown in FIG. Figure 4 In the state shown, that is, in the fully compressed state, the second pin hole 13 on the first split housing 4 is corresponding to the first pin hole 12 on the left side of the fixed housing 7, and the first split housing 4 and the fixed housing 7 can be fixed by the positioning pin, so as to keep the overall structure in a fully compressed state, which can be suitable for blasting and blowing environments with small impact force or limited space, or when the dust collection is completed, the overall structure is compressed to Figure 4 Placing it in the state shown can save space.

[0028] In addition, filters 11 are arranged on the right end faces of the second split shell 5, the third split shell 6 and the fixed shell 7, and the three groups of filters 11 are respectively located in the gap between the first split shell 4 and the second split shell 5, the gap between the second split shell 5 and the third split shell 6, and the gap between the third split shell 6 and the fixed shell 7. When blasting and purge are performed, the airflow pressure is high and the speed is fast at the moment of blasting. The blasting and purge airflow passes through the elastic baffles in the first split shell 4, the second split shell 5 and the third split shell 6 in turn to decompress and then enter the fixed shell 7. As the air pressure inside the fixed shell 7 gradually increases, most of the gas is discharged from the fixed shell 7 and the third split shell 6. The filter 11 in the gap between the three split shells 6 is discharged to the external environment, and the excess gas enters the third split shell 6 and the second split shell 5 in front in turn, and is discharged through the filter 11 between the third split shell 6 and the second split shell 5 and the filter between the second split shell 5 and the first split shell 4; as the blasting time increases, the blasting pressure gradually decreases, and the air flow speed gradually weakens. In the middle and later stages of the blasting, the air flow will gradually turn to the filter 11 between the third split shell 6 and the second split shell 5 and the filter between the second split shell 5 and the first split shell 4 for discharge, and finally complete the filtration of the blasting purge airflow.

[0029] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-stage retractable blasting and blowing environmentally friendly noise reduction dust collection device, characterized in that: include: A fixed shell having a cover at one end along the length of the blasting and purge pipeline and an opening at the other end; A split housing is provided with multiple groups, and the split housings are distributed throughout along the direction of the blasting purge airflow. Two adjacent groups of split housings can be connected by sliding sleeves along the direction of the blasting purge airflow. A group of split housings close to the fixed housing is slidably connected to the inside of the fixed housing, and the cross-sections of the multiple groups of split housings and the fixed housings gradually increase in the direction of the blasting purge airflow. A connecting bracket, one end of which in the horizontal direction is connected to a split housing close to one end of a blasting and purge pipeline, and the other end of which is connected to a pipe clamp for connecting to the blasting and purge pipeline; The elastic baffle is arranged inside the fixed shell and the split shell, and a rotation reset device is connected between the elastic baffle and the fixed shell or the split shell to rotate and reset along the blasting purge airflow direction, and the elastic baffles between the fixed shell and the split shell and between adjacent split shells are staggered up and down; The filter screen is fixedly connected to the gap between the fixed shell and the split shell and the gap between two adjacent groups of split shells.

2. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: The connecting bracket is composed of a horizontal plate, a fixed column, a sliding column, and a connecting rod. The fixed column is fixedly connected to one end of the horizontal plate. The horizontal plate is provided with long holes distributed along the length direction of the blasting and purge pipeline. The sliding column is slidably connected to the long holes, and the pipe clamp is fixedly connected to the sliding column. The connecting rod is fixedly connected to the fixed column and one end in the length direction is fixedly connected to the sliding column, and the other end is rotatably connected to the split shell.

3. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 2 is characterized in that: A telescopic spring is also connected between the connecting rod and the sliding column, and the length of the telescopic spring is distributed along a direction parallel to the length of the long strip hole.

4. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: The rotation reset device includes a rotation shaft and a reset spring. The elastic baffle is rotationally connected to the fixed shell or the split shell through the rotation shaft. The reset spring is sleeved on the rotation shaft and its two ends are respectively fixedly connected to the elastic baffle and the fixed shell or the split shell.

5. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: The fixed housing and the split housing, as well as between two adjacent groups of split housings, are provided with first pin holes distributed in corresponding positions for fixing in a fully extended state.

6. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 5 is characterized in that: A second pin hole is provided on the split housing near one end of the blasting purge pipeline, and the second pin hole is distributed correspondingly to the position of the first pin hole on the fixed housing for fixing in a fully retracted state.

7. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: A retractable handle is fixedly connected above the fixed shell.

8. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: A retractable leg is fixedly connected to the lower part of the fixed shell, and a universal wheel is installed under the retractable leg.

9. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: The lower end of the telescopic shell is also provided with an impurity discharge port.

10. The multi-stage retractable environmentally friendly noise reduction and dust collection device for blasting and blowing according to claim 1 is characterized in that: The inner wall of the fixed shell is fixedly connected with sound insulation cotton.

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