A protective net structure for mine blasting

Abstract

The utility model belongs to the field of mining engineering safety technology, especially relate to a protective net structure for mine blasting, including base, fixed plate, fixed nail and support frame etc.

Description

Technical Field

[0001] This utility model belongs to the field of mining engineering safety technology, and in particular relates to a protective net structure for mine blasting. Background Technology

[0002] Mining blasting refers to a technique used in mining operations to break rocks or ores using explosives. Blasting generates a large amount of flyrock, which can pose a serious threat to personnel, equipment, and the surrounding environment. Therefore, the use of protective netting structures in mining blasting operations is crucial.

[0003] However, most currently used protective netting structures still employ a fixed installation method, directly anchored to the ground to intercept flying rocks generated during blasting. Due to their high structural rigidity, these netting structures are highly susceptible to localized damage or even overall deformation under high-intensity impacts, leading to a significant decrease in their protective performance. Furthermore, damage to the netting requires frequent repairs with substantial manpower and resources, increasing maintenance costs and negatively impacting the long-term stable application of the protective netting structure in practical engineering projects.

[0004] Therefore, there is a particular need for a protective net structure for mine blasting to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the currently widely used fixed protective net structure, which is too rigid, easily damaged locally or deformed as a whole under high-intensity impact, resulting in reduced protective performance, frequent repairs after damage, increased costs and affecting long-term stable application, this utility model provides a protective net structure for mine blasting.

[0006] This utility model is achieved through the following technical means: a protective net structure for mine blasting, comprising a base, fixing plates, fixing nails, a support frame, a sliding frame, a connecting frame, and a protective net body. A fixing plate is fixed to each of the four sides of the base, wherein the fixing plate along the length of the base is larger than the fixing plate along the width. Multiple fixing nails are fixed to each fixing plate. The support frame is fixed to one side of the top of the base. The sliding frame is slidably mounted on the base and located directly in front of the support frame. The connecting frame is slidably placed inside the sliding frame, and the protective net body is fixedly mounted inside it. The body also includes a damper, an airbag, a one-way exhaust pipe, an inflation pipe, and an air pump. Two dampers are installed at each end of the lower part of the support frame. The fixed end of each damper is fixedly connected to the support frame, and the movable end is fixedly connected to the sliding frame. The airbag is fixed to one side of the support frame, and the sliding frame is located in front of the airbag, with the two in contact with each other. Two one-way exhaust pipes are installed side by side on the upper part of the airbag, and two inflation pipes are installed side by side on the lower part of the airbag. Two air pumps are installed on one side of the lower part of the support frame, and the air delivery end of the air pump is connected to the corresponding inflation pipe.

[0007] In one embodiment, the system further includes a protective shell and a cover plate. The two protective shells are horizontally distributed along the left-right direction and installed on the lower side of the support frame, respectively covering the two air pumps. The air pump's suction end passes through the protective shell, and a cover plate is rotatably provided on one side of each protective shell.

[0008] In one embodiment, the device further includes a magnetic block one and a magnetic block two, with a magnetic block one fixedly attached to each protective shell and a magnetic block two fixedly attached to each cover plate, and the longitudinally aligned magnetic blocks one and magnetic blocks two attract each other.

[0009] In one embodiment, the system further includes a receiving block and a pry bar, the receiving block being fixed to the lower part of the support frame and the pry bar being inserted into the receiving block.

[0010] In one embodiment, the device further includes an annular plate, a locking block, and a spring. The annular plate is fixed to the top of one of the protective shells. One end of the pry bar has a locking hole. The locking block is slidably disposed inside the annular plate, with one end inserted into the locking hole. The spring is fixed between the other end of the annular plate and the locking block.

[0011] In one embodiment, a rubber pad is also included, which is fixed to one end face of the sliding frame.

[0012] In one embodiment, a folding plate is also included, with one folding plate installed between each of the lower ends of the support frame and the sliding frame.

[0013] In one embodiment, a positioning block is also included, which is fixed to the other end of the pry bar. A positioning groove adapted to the positioning block is provided on the receiving block, and the positioning block is inserted into the positioning groove.

[0014] Beneficial effects: 1. By setting dampers to dynamically adjust the resistance during the sliding process, a stable buffer is provided when the protective net body is subjected to explosive impact force, effectively preventing local or overall structural damage due to excessive force. At the same time, in conjunction with the airbags, the remaining impact energy is efficiently absorbed during the compression process. The two work together to build a multi-level buffer and energy dissipation mechanism, thereby significantly improving the overall impact resistance and operational stability of the protective net structure and improving its long-term application performance in actual engineering.

[0015] 2. By setting up modular connecting frames, the protective net body is separated from the overall structure. When the protective net body is damaged due to long-term use or large impact, the operator does not need to disassemble and repair the entire protective net body structure on a large scale. Only the connecting frames and the protective net body need to be replaced, which simplifies the maintenance process and reduces the time and labor costs required for maintenance. Attached Figure Description

[0016] Figure 1This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the support frame, sliding frame, and connecting frame of this utility model.

[0018] Figure 3 This is a partial cross-sectional view of the sliding frame component of this utility model.

[0019] Figure 4 This is a partial sectional view of the support frame and sliding frame components of this utility model.

[0020] Figure 5 This is a partial sectional view of the base, support frame, and sliding frame components of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the protective shell, magnetic block, and cover plate of this utility model.

[0022] Figure 7 This is a three-dimensional structural diagram of the airbag, inflation tube, and air pump components of this utility model.

[0023] Figure 8 This is an exploded structural diagram of the receiving block and crowbar components of this utility model.

[0024] Figure 9 This is a partial cross-sectional view of the annular plate component of this utility model.

[0025] In the attached diagram, the following labels are used: 1-base, 2-fixed plate, 3-fixing nail, 4-support frame, 5-sliding frame, 51-rubber pad, 52-damper, 53-folding plate, 6-connecting frame, 7-protective net body, 8-airbag, 81-one-way exhaust pipe, 82-inflation pipe, 83-air pump, 9-protective shell, 91-magnetic block one, 10-cover plate, 101-magnetic block two, 11-receiving block, 12-ring plate, 13-pry bar, 131-locking hole, 132-positioning block, 14-locking block, 15-spring. Detailed Implementation

[0026] Example: A protective net structure for mine blasting, such as... Figures 1-7As shown, the structure includes a base 1, fixing plates 2, fixing nails 3, a support frame 4, a sliding frame 5, rubber pads 51, a connecting frame 6, and a protective net body 7. A fixing plate 2 is fixedly connected to each of the four sides of the base 1 (front, back, left, and right). The fixing plates 2 along the length of the base 1 are larger than those along the width; this differentiated design helps to distribute the fixing force more rationally and enhance overall stability. Multiple fixing nails 3 are fixedly connected to each fixing plate 2. The fixing nails 3 are made of hard alloy, tapered at the bottom, and have a rust-proof surface. By driving the fixing nails 3 into the ground, the entire structure can be firmly fixed to the ground, preventing movement or tipping under explosive impact. The support frame 4 is fixedly connected to the rear top of the base 1, and the sliding frame 5 is slidably mounted on the base. On seat 1, and located directly in front of support frame 4, rubber pad 51 is fixedly connected to the front end face of sliding frame 5, which can buffer when sliding frame 5 is impacted, preventing damage from rigid collision. Connecting frame 6 is slidably placed inside sliding frame 5, and a protective net body 7 is fixedly connected inside. The protective net body 7 is woven from high-strength steel wire, and the surface of the steel wire is galvanized, which has good corrosion resistance and tensile strength, and can effectively intercept flying rocks generated by blasting, preventing them from flying out and causing damage to the surrounding area. It also includes damper 52, folding plate 53, airbag 8, one-way exhaust pipe 81, inflation pipe 82 and air pump 83. Two dampers 52 are bolted to each of the two ends of the lower part of support frame 4, and the fixed end of each damper 52 is fixedly connected to support frame 4. The movable end is fixedly connected to the sliding frame 5. The damper 52 is a hydraulic damper, which can provide damping force during the sliding of the sliding frame 5, reduce the sliding speed, and make the sliding process more stable. A folding plate 53 is bolted between the lower ends of the support frame 4 and the sliding frame 5. The folding plate 53 is made of multiple foldable metal plates and flexible connectors connected by hinges. It can automatically unfold or fold as the sliding frame 5 slides. It can not only cover the guide rail area of ​​the sliding frame 5 on the base 1 to prevent dust and debris from entering and affecting the sliding, but also cover the corresponding damper 52 from above, playing a role in dust protection and extending the service life of the damper 52. The airbag 8 is fixedly connected to the front side of the support frame 4, and the sliding frame 5 is located in front of the airbag 8. The two are in contact with each other. Under normal circumstances, The airbag 8 is inflated, providing support and cushioning for the sliding frame 5. Under significant impact, the airbag 8 can further compress and deform, absorbing more impact energy and enhancing protection. The airbag 8 is made of high-strength, aging-resistant rubber material. Two one-way exhaust pipes 81 are bolted side-by-side to the upper part of the airbag 8. Each one-way exhaust pipe 81 has a one-way valve inside, allowing only gas to escape from the airbag 8 and preventing backflow of external gas. Two inflation pipes 82 are bolted side-by-side to the lower part of the airbag 8. Two air pumps 83 are bolted to the lower rear side of the support frame 4, distributed on the left and right. The air supply end of the air pump 83 is connected to the corresponding inflation pipe 82, and the air extraction end of the air pump 83 has an internal air filter for convenient extraction of outside air.It filters dust and impurities from the air, ensuring that the gas entering airbag 8 is clean.

[0027] like Figure 2 and Figure 6 As shown, it also includes a protective shell 9 and a cover plate 10. The two protective shells 9 are horizontally distributed along the left and right directions and bolted to the lower rear side of the support frame 4, respectively covering the two air pumps 83. The protective shells 9 are made of metal and the surface is painted, which has good rust prevention and protection performance, and can protect the air pumps 83 from damage by the external environment. The air pump 83's suction end passes through the protective shell 9. A cover plate 10 is rotatably installed on the rear side of each protective shell 9. The cover plate 10 is made of the same material as the protective shell 9.

[0028] like Figure 6 As shown, it also includes a magnetic block 91 and a magnetic block 101. A magnetic block 91 is fixedly connected to each protective shell 9, and a magnetic block 101 is fixedly connected to each cover plate 10. The longitudinally aligned magnetic blocks 91 and 101 attract each other, thereby firmly locking the cover plate 10 onto the protective shell 9 and preventing the cover plate 10 from accidentally opening the protective shell 9.

[0029] like Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, it also includes a receiving block 11, a pry bar 13, and a positioning block 132. The receiving block 11 is fixedly connected to the lower part of the support frame 4. The pry bar 13 is inserted into the receiving block 11. The positioning block 132 is fixedly connected to the upper end of the pry bar 13. The receiving block 11 has a positioning groove that matches the positioning block 132. The positioning block 132 is inserted into the positioning groove, thereby restricting the rotation of the pry bar 13 on the receiving block 11, ensuring the stability of the pry bar 13, and providing a guiding effect for the insertion of the pry bar 13, guiding the operator to quickly and accurately insert the pry bar 13 into the receiving block 11.

[0030] like Figure 2 and Figure 9 As shown, it also includes an annular plate 12, a locking block 14, and a spring 15. The annular plate 12 is fixedly connected to the top left of the left protective shell 9. The lower end of the pry bar 13 has a locking hole 131. The locking block 14 is slidably disposed inside the annular plate 12, with its front end inserted into the locking hole 131. Both the front end of the locking block 14 and the locking hole 131 are designed as hemispherical structures so that the locking block 14 can be smoothly disengaged from the locking hole 131 under the action of external force. The spring 15 is fixedly connected between the rear end of the annular plate 12 and the locking block 14 to provide a reset force for the locking block 14.

[0031] In the initial state, the airbag 8 is inflated, and its front end face is close to the rear end face of the sliding frame 5, forming a stable support structure. Before the mining blasting operation, the operators transport the protective net structure to the designated location at the blasting site. After arriving at the site, the operators use professional tools to drive the fixing nails 3 into the ground at an angle perpendicular to the ground, ensuring that each fixing nail 3 penetrates into the foundation to a certain depth, thereby firmly anchoring the entire structure to the foundation and preventing the structure from moving or tilting during the subsequent blasting process.

[0032] When the blasting occurs, the flying rocks impact the protective net body 7 at high speed. The protective net body 7 can quickly intercept the flying rocks, effectively preventing them from continuing to spread outside the site and ensuring the safety of the surrounding environment and personnel.

[0033] During the impact of flying stones on the protective net body 7, some of the impact force will be transmitted to the sliding frame 5 through the connecting frame 6, causing the sliding frame 5 to tend to slide backward. At this time, the damper 52 set between the sliding frame 5 and the support frame 4 begins to play a role in slowing down the sliding speed of the sliding frame 5. The protective net body 7 will move backward together with the sliding frame 5. This movement method can effectively disperse the impact force and avoid structural damage due to excessive impact force concentration.

[0034] At the same time, the airbag 8 is further compressed to absorb the remaining energy generated by the blast impact, further reducing the degree of damage to the overall structure caused by the blast. When the airbag 8 is compressed, the gas inside it is discharged through the one-way exhaust pipe 81, thereby maintaining the stability of the internal pressure of the airbag 8 and ensuring that the airbag 8 can stably play a buffering role.

[0035] After the blasting is completed, the protective net body 7 no longer bears the impact force of flying rocks. At this time, the damper 52 assists the sliding frame 5 to reset forward under its own elasticity, so that the sliding frame 5 gradually returns to its initial position. Then, the operator starts the air pump 83. The air pump 83 draws air through the air extraction end and inflates the air bag 8 through the inflation pipe 82. During the inflation process, the operator closely monitors the expansion of the air bag 8, so that it slowly expands to the preset state, and provides the initial buffer support for the sliding frame 5 again, ensuring that the structure returns to the best protection state and is ready for the next blasting operation.

[0036] If the protective net body 7 needs to be replaced, the operator first pulls the pry bar 13 upwards. During the pulling process, the locking hole 131 at the lower end of the pry bar 13 and the locking block 14 are smoothly disengaged under the action of the spring 15. Then, the operator uses the pry bar 13 to pry the connecting frame 6 upwards. Using the lever principle, the connecting frame 6 can be easily disengaged from the sliding frame 5. At this time, the protective net body 7 is taken out together with the connecting frame 6, and the operator can easily repair or replace the protective net body 7.

[0037] After replacing the new protective net body 7, the connecting bracket 6 is put back into the sliding bracket 5. Then, the pry bar 13 is inserted back into the receiving block 11. At the same time, the lower end of the pry bar 13 enters the annular plate 12. Under the action of the spring 15, the locking block 14 moves forward automatically and re-locks into the locking hole 131, thereby locking the position of the pry bar 13.

Claims

1. A protective screen structure for use in mine blasting, characterised in that: The device includes a base (1), a fixing plate (2), fixing nails (3), a support frame (4), a sliding frame (5), a connecting frame (6), and a protective net body (7). Each of the four sides of the base (1) is fixed with a fixing plate (2). The fixing plate (2) located in the length direction of the base (1) is larger than the fixing plate (2) in the width direction. Each fixing plate (2) is fixed with multiple fixing nails (3). The support frame (4) is fixed to one side of the top of the base (1). The sliding frame (5) is slidably set on the base (1) and is located in front of the support frame (4). The connecting frame (6) is slidably placed inside the sliding frame (5), and the protective net body (7) is fixed inside it. The device also includes a damper (52) and an airbag (8). One-way exhaust pipe (81), inflation pipe (82) and air pump (83) are provided. Two dampers (52) are installed at each end of the lower part of the support frame (4). The fixed end of each damper (52) is fixedly connected to the support frame (4), and the movable end is fixedly connected to the sliding frame (5). The airbag (8) is fixedly connected to one side of the support frame (4). The sliding frame (5) is located in front of the airbag (8) and the two are in contact with each other. Two one-way exhaust pipes (81) are installed side by side on the upper part of the airbag (8), and two inflation pipes (82) are installed side by side on the lower part of the airbag (8). Two air pumps (83) are installed on the lower side of the support frame (4) and are distributed on the left and right. The air delivery end of the air pump (83) is connected to the corresponding inflation pipe (82).

2. A protective screen structure for use in mine blasting as claimed in claim 1 wherein: It also includes a protective shell (9) and a cover plate (10). The two protective shells (9) are horizontally distributed along the left and right directions and installed on the lower side of the support frame (4), respectively covering the two air pumps (83). The air pump (83)'s suction end passes through the protective shell (9). Each protective shell (9) has a cover plate (10) rotatably installed on one side.

3. A protective screen structure for use in mine blasting as claimed in claim 2 wherein: It also includes a magnetic block one (91) and a magnetic block two (101). A magnetic block one (91) is fixed on each protective shell (9), and a magnetic block two (101) is fixed on each cover plate (10). The magnetic blocks one (91) and magnetic blocks two (101) aligned longitudinally attract each other.

4. A protective screen structure for use in mine blasting as claimed in claim 3 wherein: It also includes a receiving block (11) and a crowbar (13), the receiving block (11) being fixed to the lower part of the support frame (4), and the crowbar (13) being inserted into the receiving block (11).

5. A protective screen structure for use in a mine blast as claimed in claim 4 wherein: It also includes an annular plate (12), a locking block (14) and a spring (15). The annular plate (12) is fixed to the top of one of the protective shells (9). A locking hole (131) is opened at one end of the pry bar (13). The locking block (14) is slidably disposed inside the annular plate (12), with one end inserted into the locking hole (131). The spring (15) is fixed between the other end of the annular plate (12) and the locking block (14).

6. A protective screen structure for use in mine blasting as claimed in claim 5 wherein: It also includes a rubber pad (51), which is fixed to one side end face of the sliding frame (5).

7. A protective screen structure for use in mine blasting as claimed in claim 6 wherein: It also includes a folding plate (53), with a folding plate (53) installed between the lower ends of the support frame (4) and the sliding frame (5).

8. A protective screen structure for use in mine blasting as claimed in claim 7 wherein: It also includes a positioning block (132), which is fixed to the other end of the pry bar (13). The receiving block (11) has a positioning groove that matches the positioning block (132), and the positioning block (132) is inserted into the positioning groove.

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