Blast hole plugging and dust falling structure based on blasting pressure atomization

By using a combination of stable components and buffer components in the blasting dust reduction device, the problem of damage caused by shaking during the handling of traditional devices is solved, and the safety performance and practicality of the device are improved.

CN222460473UActive Publication Date: 2025-02-11LANLING JINSHUN BLASTING ENG CO LTD

Patent Information

Application Number
CN202421358292.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-14
Publication Date
2025-02-11
Estimated Expiration
2034-06-14

AI Technical Summary

Technical Problem

Traditional blasting dust reduction devices are prone to shaking during the handling process, causing components such as explosives and water cannon mud to easily impact the cavity wall of the device, or even damage, reducing the safety performance of the device.

Method used

A gun hole sealing and dust reduction structure based on blasting pressure atomization is designed, using a combination of stable components and buffer components. Through the clamping of stable components and elastic deformation of buffer components, external vibration is slowed down and the device is ensured during handling. stability.

Benefits of technology

It effectively avoids damage to components such as explosives and water cannon mud during the handling process due to shaking, and improves the safety performance and practicality of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a blast hole plugging dust fall structure based on blasting pressure atomization, which relates to the technical field of mine blasting related equipment and comprises a bottom cavity seat, a stabilizing component is slidably connected to the upper end of the bottom cavity seat, a dust fall mounting cavity is arranged at the upper end of the stabilizing component, and blasting hole cavities are uniformly distributed on one side of the dust fall mounting cavity. Each stabilizing assembly comprises a cavity supporting base slidably connected to one side of the bottom cavity base, long grooves are formed in the top faces of the cavity supporting bases, rotating rods are rotatably connected to one sides of the cavity supporting bases, long supporting blocks are slidably connected to inner cavities of the two long grooves, stabilizing plates are arranged at the tops of the long supporting blocks, and rubber pads are arranged on one sides of the inner walls of the stabilizing plates. According to the arrangement, the dust fall mounting cavities with different widths can be conveniently and stably mounted through the stabilizing assemblies, so that the dust fall mounting cavities are prevented from shaking constantly in the process of moving the dust fall mounting cavities, the situation that explosive, blister mud and other components are prone to impacting the cavity wall of the device and even damage the blister mud is prevented, and the safety performance of the device is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of mine blasting related equipment, in particular to a blast hole plugging and dust reduction structure based on blasting pressure atomization. Background Art

[0002] The blasting process (or the development of water mist device) that uses hydraulic blasting to suppress blasting smoke and blasting toxic gases. The amount of dust from open-air deep hole blasting is large and the pollution range is wide. Researching efficient and reasonable blasting dust reduction technology is an urgent task for green mine construction. For this purpose, a three-dimensional water mist dust reduction model is designed in a targeted manner, which includes water bags to seal blast holes, blast top surfaces, and throw water bags in front to explode into mist. The reasonable spacing and ratio of water bags are optimized and designed to reduce the concentration of blasting dust. The blasting dust reduction method of the prior art uses a combination of water cannon mud and clay cannon mud. This combination method is equipped with electric detonators, explosives, water cannon mud and clay cannon mud in the blasting hole. The water cannon mud is water injected into the circular bag body to play a role in dust reduction, and the clay cannon mud plays a role in sealing.

[0003] On this basis, after searching the Chinese patent publication number CN212362996U, a blasting and blocking dust reduction device is disclosed;

[0004] However, there are shortcomings in this patent application: the traditional blasting dust reduction device has a relatively simple structure and function, and the blasting hole in the device is equipped with important components such as electric detonators, explosives, water cannon mud and clay cannon mud. When the device is transported to the designated location of the mine construction, the moving process will produce shaking from time to time, and the device lacks a protective mechanism to buffer the vibration. The vibration of the device will greatly affect the explosives and water bubble mud inside the blasting hole. Components such as explosives and water bubble mud are prone to hit the cavity wall of the device, and even damage the water bubble mud. The explosives are also in an unstable environment and are prone to dangerous situations, reducing the safety performance of the device. Utility Model Content

[0005] The purpose of the utility model is to provide a blast hole plugging and dust reduction structure based on blasting pressure atomization. The device is used to work, thereby solving the problem that the structure and function of the traditional blasting dust reduction device in the above background are relatively simple. The blasting hole in the device will be equipped with important components such as electric detonators, explosives, water cannon mud and clay cannon mud. When the transport device is transported to the designated location of the mine construction, the moving device will shake from time to time, and the device lacks a protective mechanism for buffering vibration. The vibration of the device will greatly affect the explosives and water bubble mud inside the blasting hole. The explosives, water bubble mud and other components are easy to hit the cavity wall of the device, and even damage the water bubble mud. The explosives are also in an unstable environment and are prone to dangerous situations, thereby reducing the safety performance of the device.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a blast hole plugging and dust reduction structure based on blasting pressure atomization, comprising a bottom cavity seat, a stabilizing component is slidably connected to the upper end of the bottom cavity seat, a dust reduction installation cavity is arranged on the upper end of the stabilizing component, and blasting hole cavities are evenly distributed on one side of the dust reduction installation cavity, and multiple groups of blasting hole cavities are arranged. The stabilizing component comprises a support cavity seat slidably connected to one side of the bottom cavity seat, a long groove is arranged on the top surface of the support cavity seat, and a rotating rod is rotatably connected to one side of the support cavity seat. The inner cavities of the two groups of long grooves are slidably connected with supporting long blocks, a stabilizing plate is arranged on the top of the supporting long block, a rubber pad is arranged on one side of the inner wall of the stabilizing plate, and a buffer component is arranged in the inner cavity of the bottom cavity seat. Multiple groups of buffer components are arranged, and the buffer component comprises a fixed plate fixedly connected to the inner cavity of the bottom cavity seat, a connecting block is fixedly connected to the top surface of the fixed plate, a connecting rod component is rotatably connected to one side of the connecting block, and two groups of connecting rod components are arranged. A spring telescopic rod is also arranged on the top surface of the fixed plate, and two groups of spring telescopic rods are arranged.

[0007] Preferably, the stabilizing component also includes a support plate fixedly connected to the inner cavity of the support cavity seat, one side of the support plate is fixedly connected to a fixed block, two groups of fixed blocks are provided, and positive and negative threaded rods are rotatably connected between the two groups of fixed blocks.

[0008] Preferably, one end of the forward and reverse screw rod passes through the support cavity seat and extends to one side of the rotating rod, the rotating rod is fixedly connected to the forward and reverse screw rod, the outer periphery of the forward and reverse screw rod is threadedly connected with a moving block, and one side of the moving block is fixedly connected to a limiting block.

[0009] Preferably, the two groups of limit blocks are slidably connected to one side of the support plate, the bottom side of the two groups of support long blocks extends to the inner cavity of the support cavity seat, and the two groups of support long blocks are respectively fixedly connected to the corresponding two groups of moving blocks.

[0010] Preferably, the buffer component further comprises a support plate arranged on the upper end of the fixed plate, and the support plates are provided in two groups, and a long rod is fixedly connected between the two groups of support plates.

[0011] Preferably, the outer circumference of the long rod is slidably connected with a sliding block, and two groups of sliding blocks are provided. The outer circumference of the long rod is sleeved with a first spring, and two groups of first springs are provided.

[0012] Preferably, both ends of the first spring are fixedly connected between the support plate and the sliding block, the two groups of connecting rod components are respectively rotatably connected to the two groups of sliding blocks, the bottom of the support cavity seat is in contact with the top of the two groups of spring telescopic rods, and the bottom of the support cavity seat is also connected to the top of the two groups of support plates.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model discloses a blast hole plugging and dust reduction structure based on blasting pressure atomization. In order to study efficient and reasonable blasting dust reduction technology and green mine construction, a blasting pressure atomization dust reduction method is usually selected. A plurality of blast hole cavities are arranged in the dust reduction installation cavity. The blast hole cavities are all filled with water cannon mud, electric detonators and explosives. The water cannon mud is water-filled in a circular bag body, which plays a role in dust reduction. Finally, clay cannon mud is used to plug the blast hole cavity. The installed dust reduction installation cavity will be transported to the designated use location of the mine. In order to make the dust reduction installation cavity more firmly placed, the dust reduction installation cavity is placed on the top surface of the support cavity seat, and the rotating rod is rotated in the reverse direction. The rotating rod drives the forward and reverse rotations. The screw rod rotates in the opposite direction, and the two groups of moving blocks and the supporting long blocks move towards each other. The two groups of limit blocks will drive the two groups of stabilizing plates to approach the sides of the dust reduction installation cavity until the two groups of stabilizing plates tightly clamp the sides of the dust reduction installation cavity and stabilize them. The rubber pads on the inner walls of the stabilizing plates improve the stability of the stabilizing plates, and then the stabilizing components are installed in combination with the dust reduction installation cavity. This setting facilitates the stable installation of dust reduction installation cavities of different widths through the stabilizing components, thereby avoiding shaking during the process of moving the dust reduction installation cavity, preventing components such as explosives and blister mud from easily hitting the cavity wall of the device, and even damaging the blister mud, thereby improving the safety performance of the device.

[0015] 2. The utility model discloses a blast hole plugging and dust reduction structure based on blasting pressure atomization. When the transport device is moved to the designated location of the mine construction, the moving dust reduction installation cavity will shake from time to time, and the traditional device lacks a buffer protection mechanism, which can easily cause the explosives to be in an unstable environment and prone to dangerous situations. After the installation of the dust reduction installation cavity and the stabilizing component of the utility model is completed, due to the factor of gravity, the dust reduction installation cavity will cause the support cavity seat to slide downward along the bottom cavity seat. At this time, multiple groups of buffer components are at the bottom of the support cavity seat, and the vibration of the external environment can easily cause the dust reduction installation cavity and the support cavity seat to vibrate, and the vibration will also be transmitted to the pair of buffer components. The two groups of spring telescopic rods will telescope in the inner cavity of the bottom cavity seat due to the vibration. The elastic deformation generated by the multiple groups of spring telescopic rods can initially reduce the impact force on the support cavity seat, and the vibration force can also be transmitted to the support plate to cause it to shake. After the support plate shakes up and down, the two groups of connecting rods will When the component rotates, the connecting rod component can make the sliding blocks at both ends of the connecting rod component slide relative to each other, and the movement of the sliding blocks can make the first spring perform telescopic motion. The elastic deformation generated by the first spring can further reduce the impact force on the dust reduction installation cavity. Multiple groups of buffer components are distributed on the upper and lower sides of the stabilizing component. Under the joint effect, the purpose of buffering the vibration of the stabilizing component and the dust reduction installation cavity under the action of external impact force is achieved, thereby improving the stability of the dust reduction installation cavity and the material placement inside the blasting hole cavity, effectively preventing it from shaking, and protecting the dust reduction installation cavity. This setting is combined with the dust reduction installation cavity, the stabilizing component and the bottom cavity seat. When the dust reduction installation cavity is transported to the designated location of the mine construction, the dust reduction installation cavity is in a relatively stable state, thereby preventing external vibrations from affecting the explosives and blister mud inside the blasting hole, and causing dangerous situations, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the utility model;

[0017] Figure 2 This is a structural diagram of the dust suppression installation cavity, the stabilizing assembly and the bottom cavity seat of the utility model;

[0018] Figure 3 This is a structural diagram of the buffer component of the utility model;

[0019] Figure 4 This is a structural diagram of the stabilizing assembly and dust suppression installation cavity of the utility model;

[0020] Figure 5 This is a structural diagram of the stabilizing component of the present utility model.

[0021] In the figure: 1. dust suppression installation cavity; 11. blasting hole cavity; 2. stabilizing component; 21. support cavity seat; 211. support plate; 22. long groove; 23. rotating rod; 24. stabilizing plate; 25. moving block; 26. positive and negative threaded rod; 27. limiting block; 28. fixing block; 29. ​​supporting long block; 3. bottom cavity seat; 31. buffer component; 311. fixing plate; 312. connecting block; 313. connecting rod component; 314. supporting plate; 315. first spring; 316. long rod; 317. sliding block; 318. spring telescopic rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0024] Combination Figure 1-5 A blast hole plugging and dust reduction structure based on blasting pressure atomization includes a bottom cavity seat 3, a stabilizing component 2 is slidably connected to the upper end of the bottom cavity seat 3, a dust reduction installation cavity 1 is arranged on the upper end of the stabilizing component 2, blasting hole cavities 11 are evenly distributed on one side of the dust reduction installation cavity 1, and the blasting hole cavities 11 are arranged in multiple groups, and the stabilizing component 2 includes a support cavity seat 21 slidably connected to one side of the bottom cavity seat 3, a long groove 22 is arranged on the top surface of the support cavity seat 21, a rotating rod 23 is rotatably connected to one side of the support cavity seat 21, and the inner cavities of the two groups of long grooves 22 are slidably connected to support long blocks 29, and the support cavity seat 21 is provided with a plurality of groups of support cavities. A stabilizing plate 24 is arranged on the top of the support block 29, a rubber pad is arranged on one side of the inner wall of the stabilizing plate 24, a buffer component 31 is arranged in the inner cavity of the bottom cavity seat 3, and the buffer component 31 is arranged in multiple groups. The buffer component 31 includes a fixed plate 311 fixedly connected to the inner cavity of the bottom cavity seat 3, a connecting block 312 is fixedly connected to the top surface of the fixed plate 311, a connecting rod component 313 is rotatably connected to one side of the connecting block 312, and the connecting rod component 313 is arranged in two groups. A spring telescopic rod 318 is also arranged on the top surface of the fixed plate 311, and the spring telescopic rod 318 is arranged in two groups.

[0025] The utility model is further described below in conjunction with embodiments.

[0026] Example 1

[0027] See also Figure 1-2 and Figure 4-5The stabilizing component 2 also includes a support plate 211 fixedly connected to the inner cavity of the support cavity seat 21, and a fixed block 28 is fixedly connected to one side of the support plate 211. Two groups of fixed blocks 28 are provided, and a positive and negative screw rod 26 is rotatably connected between the two groups of fixed blocks 28. One end of the positive and negative screw rod 26 passes through the support cavity seat 21 and extends to one side of the rotating rod 23. The rotating rod 23 is fixedly connected to the positive and negative screw rod 26. The outer periphery of the positive and negative screw rod 26 is threadedly connected with a moving block 25, and one side of the moving block 25 is fixedly connected to a limiting block 27. Two groups of limiting blocks 27 are slidably connected to one side of the support plate 211. One side of the bottom of the two groups of supporting long blocks 29 extends to the inner cavity of the support cavity seat 21, and the two groups of supporting long blocks 29 are respectively fixedly connected to the corresponding two groups of moving blocks 25.

[0028] Example 2

[0029] See also Figure 1-3 The buffer component 31 also includes a support plate 314 arranged at the upper end of the fixed plate 311, and the support plate 314 is provided with two groups. A long rod 316 is fixedly connected between the two groups of support plates 314, and a sliding block 317 is slidably connected to the outer periphery of the long rod 316. There are two groups of sliding blocks 317, and a first spring 315 is sleeved on the outer periphery of the long rod 316. There are two groups of first springs 315. Both ends of the first spring 315 are fixedly connected between the support plate 314 and the sliding block 317. The two groups of connecting rod components 313 are rotatably connected to the two groups of sliding blocks 317 respectively, and the bottom of the support cavity seat 21 contacts the top of the two groups of spring telescopic rods 318, and the bottom of the support cavity seat 21 is also connected to the top of the two groups of support plates 314.

[0030] To sum up, working principle: the utility model discloses a blast hole plugging and dust reduction structure based on blasting pressure atomization. In order to study efficient and reasonable blasting dust reduction technology and green mine construction, blasting pressure atomization dust reduction method is usually selected. A plurality of blasting hole cavities 11 are arranged in the dust reduction installation cavity 1. The blasting holes 11 are all filled with water cannon mud, electric detonators and explosives. The water cannon mud is water injected into the circular bag, which plays a role in dust reduction. Finally, clay cannon mud is used to plug the blasting hole 11. The installed dust reduction installation cavity 1 will be transported to the designated use location of the mine. In order to make the dust reduction installation cavity 1 more stable, the dust reduction installation cavity 1 is placed on the top surface of the support cavity seat 21, and the rotating rod 23 is rotated in the opposite direction. The rotating rod 23 drives the positive The reverse screw rod 26 rotates in the opposite direction, and the two groups of moving blocks 25 and the supporting long block 29 move closer to each other. The two groups of limit blocks 27 will drive the two groups of stabilizing plates 24 to move closer to the side of the dust reduction installation cavity 1, until the two groups of stabilizing plates 24 tightly clamp the side of the dust reduction installation cavity 1, and the rubber pads on the inner walls of the stabilizing plates 24 improve the stability of the clamping of the stabilizing plates 24, so that the stabilizing components 2 and the dust reduction installation cavity 1 are installed together for use. This arrangement facilitates the stable installation of dust reduction installation cavities 1 of different widths through the stabilizing component 2, thereby avoiding the shaking of the dust reduction installation cavity 1 from time to time during the moving process, preventing explosives and blister mud and other components from easily hitting the cavity wall of the device, and even damaging the blister mud, thereby improving the safety performance of the device;

[0031] When the transport device is moved to the designated location of the mine construction, the dust reduction installation chamber 1 will shake from time to time during the moving process, and the traditional device lacks a buffer protection mechanism, which can easily put the explosives in an unstable environment and easily cause dangerous situations; when the dust reduction installation chamber 1 and the stabilizing component 2 of the present invention are installed, due to the factor of gravity, the dust reduction installation chamber 1 will cause the support chamber seat 21 to slide downward along the bottom chamber seat 3. At this time, the multiple groups of buffer components 31 are at the bottom of the support chamber seat 21, and the vibration of the external environment can easily cause the dust reduction installation chamber 1 and the support chamber seat 21 to vibrate, and the vibration will also be transmitted to the pair of buffer components 31. The two groups of spring telescopic rods 318 will telescope in the inner cavity of the bottom chamber seat 3 due to the vibration. The elastic deformation generated by the multiple groups of spring telescopic rods 318 can initially reduce the impact force on the support chamber seat 21, and the vibration force can also be transmitted to the support plate 314 to cause it to shake. After the support plate 314 shakes up and down, the two groups of connecting rod components 313 will rotate, and the connecting rod components 313 can The sliding blocks 317 at both ends of the connecting rod component 313 slide relative to each other, and the movement of the sliding blocks 317 can make the first spring 315 perform telescopic movement. The elastic deformation generated by the first spring 315 can further reduce the impact force on the dust reduction installation cavity 1. Multiple groups of buffer components 31 are distributed on the upper and lower sides of the stabilizing component 2. Under the joint effect, the purpose of buffering the vibration of the stabilizing component 2 and the dust reduction installation cavity 1 under the action of external impact force is achieved, and the stability of the dust reduction installation cavity 1 and the material placement inside the blasting hole cavity 11 is improved, and the shaking is effectively prevented, thereby protecting the dust reduction installation cavity 1. This setting is combined with the dust reduction installation cavity 1, the stabilizing component 2 and the bottom cavity seat 3. When the dust reduction installation cavity 1 is transported to the designated location of the mine construction, the dust reduction installation cavity 1 is in a relatively stable state, thereby preventing external vibrations from affecting the explosives and blister mud inside the blasting hole, thereby preventing dangerous situations, thereby improving the practicability of the device.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast hole plugging and dust reduction structure based on blasting pressure atomization, comprising a bottom cavity seat (3), the upper end of the bottom cavity seat (3) is slidably connected with a stabilizing component (2), the upper end of the stabilizing component (2) is provided with a dust reduction installation cavity (1), one side of the dust reduction installation cavity (1) is evenly distributed with blasting hole cavities (11), and the blasting hole cavities (11) are provided with multiple groups, characterized in that: the stabilizing component (2) comprises a supporting cavity seat (21) slidably connected to one side of the bottom cavity seat (3), the top surface of the supporting cavity seat (21) is provided with a long groove (22), one side of the supporting cavity seat (21) is rotatably connected with a rotating rod (23), and the inner cavities of the two groups of the long grooves (22) are slidably connected with supporting long blocks ( 29), a stabilizing plate (24) is arranged on the top of the supporting long block (29), a rubber pad is arranged on one side of the inner wall of the stabilizing plate (24), a buffer component (31) is arranged in the inner cavity of the bottom cavity seat (3), and the buffer component (31) is arranged in multiple groups, and the buffer component (31) includes a fixing plate (311) fixedly connected to the inner cavity of the bottom cavity seat (3), a connecting block (312) is fixedly connected to the top surface of the fixing plate (311), and a connecting rod component (313) is rotatably connected to one side of the connecting block (312), and the connecting rod component (313) is arranged in two groups, and a spring telescopic rod (318) is also arranged on the top surface of the fixing plate (311), and the spring telescopic rod (318) is arranged in two groups.

2. The blast hole plugging and dust reduction structure based on blasting pressure atomization according to claim 1 is characterized by: The stabilizing component (2) further comprises a support plate (211) fixedly connected to the inner cavity of the support cavity seat (21), a fixed block (28) being fixedly connected to one side of the support plate (211), two groups of fixed blocks (28) being provided, and a positive and negative threaded rod (26) being rotatably connected between the two groups of fixed blocks (28).

3. The blast hole plugging and dust reduction structure based on blasting pressure atomization according to claim 2 is characterized by: One end of the positive and negative threaded rod (26) passes through the support cavity seat (21) and extends to one side of the rotating rod (23), the rotating rod (23) is fixedly connected to the positive and negative threaded rod (26), the outer periphery of the positive and negative threaded rod (26) is threadedly connected to a moving block (25), and one side of the moving block (25) is fixedly connected to a limiting block (27).

4. The blast hole plugging and dust reduction structure based on blasting pressure atomization according to claim 3 is characterized by: The two groups of limit blocks (27) are slidably connected to one side of the support plate (211), the bottom side of the two groups of support long blocks (29) extends to the inner cavity of the support cavity seat (21), and the two groups of support long blocks (29) are respectively fixedly connected to the corresponding two groups of moving blocks (25).

5. The blast hole plugging and dust reduction structure based on blasting pressure atomization according to claim 4 is characterized by: The buffer component (31) further comprises a support plate (314) arranged at the upper end of the fixed plate (311), and two groups of support plates (314) are provided, and a long rod (316) is fixedly connected between the two groups of support plates (314).

6. The blast hole plugging and dust reduction structure based on blasting pressure atomization according to claim 5 is characterized by: The outer periphery of the long rod (316) is slidably connected with a sliding block (317), and two groups of sliding blocks (317) are provided. The outer periphery of the long rod (316) is sleeved with a first spring (315), and two groups of first springs (315) are provided.

7. The blast hole plugging and dust reduction structure based on blasting pressure atomization according to claim 6 is characterized by: The two ends of the first spring (315) are fixedly connected between the support plate (314) and the sliding block (317), the two groups of connecting rod components (313) are rotatably connected to the two groups of sliding blocks (317) respectively, the bottom of the support cavity seat (21) is in contact with the top of the two groups of spring telescopic rods (318), and the bottom of the support cavity seat (21) is also connected to the top of the two groups of support plates (314).

Citation Information

Patent Citations

  • Blasting sealing dust settling device

    CN212362996U

Cited By

  • Blast hole plugging and dust falling structure

    CN223976563U