A secondary static blasting device

Abstract

This invention discloses a secondary static blasting device, comprising a central column, a receiving box, a chassis, a sealing mechanism, a stiffening plate, a splitting blade mechanism, and heating wires. The receiving box is installed on the upper part of the chassis, and the central column is inserted into the center of the receiving box and extends through the lower part of the chassis. Several sealing mechanisms are arranged on the circumference of the chassis, and a stiffening plate is arranged at the lower end of the chassis. The splitting blade mechanism is fitted into the lower part of the central column, and a central column inner bladder is arranged inside the central column, with heating wires embedded in the inner bladder. The beneficial effects of this invention are: the blade-shaped splitting mechanism facilitates multi-directional rock fragmentation; the integrated expansion agent injection function improves construction efficiency and simplifies the construction process; after the expansion agent is injected, the expansion effect of the expansion agent increases the friction between the stiffening plate and the rock hole, preventing the device from being pushed out of the rock hole by the expansion agent, thus achieving large-scale secondary blasting and realizing an integrated process of "splitting, injection, sealing, heating, and blasting".

Description

Technical Field

[0001] This invention relates to the field of static blasting technology, and in particular to a device capable of secondary static blasting. Background Technology

[0002] With the development of the times and the progress of science and technology, underground space, as an important national land resource, is increasingly being studied and developed. Underground projects such as tunnel and subway construction, deep resource mining and storage, basements and national defense projects are increasing in number and on a larger scale. Before the construction of underground projects, the soil and rock media should be excavated. Static blasting is widely used in rock breaking and excavation projects due to its advantages such as small surface vibration, small impact, no flying rocks, low noise, safety and high efficiency. Static blasting commonly uses rock splitters, hydraulic breakers, expansion agents, etc.

[0003] Complex geological conditions or difficult working conditions are often encountered during excavation, posing a great challenge to construction. The problem of hard rock fracturing and excavation is one of the major challenges. Hard rock fracturing and excavation place extremely high demands on the strength and structure of static blasting equipment, the composition ratio and performance of expanding agents, and hard rock fracturing causes significant wear and damage to blasting equipment. Currently, there are not many blasting equipment or methods specifically designed for hard rock fracturing and excavation.

[0004] When large-scale blasting is required, multiple blasting devices are often needed to work together. This requires a lot of equipment and high coordination between devices, which can lead to significant expenses. Existing single static blasting devices have a small blasting range, require a lot of manpower and resources, and can also delay the construction period.

[0005] Therefore, it is necessary to propose a secondary static blasting device to address the above problems. Summary of the Invention

[0006] To address the shortcomings of the existing technologies, the present invention aims to provide a secondary static blasting device that integrates the secondary static blasting process of "splitting, injection, sealing, heating, and blasting," effectively solving the problems of hard rock excavation or large-scale blasting in practical engineering.

[0007] A secondary static blasting device includes a central column, a receiving box, a chassis, a sealing mechanism, stiffening plates, a splitting blade mechanism, and heating wires. The receiving box is installed on the upper part of the chassis. The central column is inserted into the center of the receiving box and passes through the lower part of the chassis. Several sealing mechanisms are provided on the circumference of the chassis. Several stiffening plates are provided on the lower circumference of the chassis. The splitting blade mechanism is fitted into the lower part of the central column. A central column inner bladder is provided inside the central column. The central column inner bladder is embedded with heating wires. An injection hole is provided at the center of the central column.

[0008] Preferably, the upper part of the central column is provided with two mutually symmetrical central column extension plates.

[0009] Preferably, the splitting blade mechanism includes an annular rotating shaft and a plurality of splitting blades, wherein the upper part of the splitting blade is provided with a rotating shaft hole, and the plurality of splitting blades are mounted on the annular rotating shaft through the rotating shaft hole.

[0010] Preferably, a connecting plate is connected between two adjacent splitting blades on an annular rotating shaft, and the connecting plate is connected to a lifting plate.

[0011] Preferably, the upper part of the lifting plate extends through the receiving box and is connected to a lifting platform.

[0012] Preferably, the sealing mechanism includes a knob, a drive screw, a push-pull rod, and a sealing plate. One end of the drive screw is connected to the knob, and the other end of the drive screw is connected to one end of the push-pull rod via a tenon-and-mortise connection. The other end of the push-pull rod is connected to the sealing plate.

[0013] Preferably, the drive screw is threadedly connected to the threaded hole of the chassis.

[0014] Preferably, the outer edge of the stiffening plate is provided with serrations.

[0015] Preferably, the lower part of the stiffening plate is connected to a foot.

[0016] Preferably, the stiffening plate 10 and the splitting blade 12 are arranged alternately.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The present invention is equipped with a blade-shaped splitting mechanism, which can split rocks more effectively. It is equipped with 6 splitting blades, which is conducive to multi-directional rock fragmentation and optimizes the splitting and blasting effect.

[0019] (2) The present invention integrates the function of expanding agent injection, which can directly inject expanding agent without changing the construction equipment, thereby improving construction efficiency and simplifying the construction process.

[0020] (3) After the expansion agent is injected, the expansion effect of the expansion agent increases the friction between the stiffening plate and the rock hole, preventing the device from being pushed out of the rock hole by the expansion agent. After the device covers the rock hole and closes the sealing plate, it achieves automatic sealing and enhances the expansion blasting effect.

[0021] (4) After the splitting blast, a second static blast with an expanding agent is carried out. The secondary blast can effectively break hard rock. The expanding agent enters the splitting cracks, which can achieve a large-scale secondary blast. The heating wire is heated, and the temperature rises to accelerate the expansion reaction of the expanding agent.

[0022] (5) It realizes the integrated process of "splitting, injection, sealing, heating and blasting", and the device has a comprehensive function. Attached Figure Description

[0023] Figure 1 This is an isometric view of the present invention;

[0024] Figure 2 This is a half-section isometric view of the present invention;

[0025] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0026] Figure 4 for Figure 2 and Figure 3 Enlarged structural diagram at point A in the middle;

[0027] Figure 5 This is a sectional view of BB.

[0028] The attached diagram shows the following reference numerals: 1. Central column; 2. Central column mounting plate; 3. Receiving box; 4. Chassis; 5. Threaded hole; 6. Drive screw; 7. Knob; 8. Push-pull rod; 9. Sealing plate; 10. Stiffening plate; 11. Foot; 12. Splitting blade; 13. Heating wire; 14. Lifting mounting plate; 15. Connecting plate; 16. Rotary shaft hole; 17. Annular rotating shaft; 18. Lifting plate; 19. Central column inner bladder; 20. Injection hole; 21. Rock hole; 22. Rock medium; 23. Sealing mechanism; 24. Splitting blade mechanism. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0033] like Figure 1 and combined Figures 2 to 5 As shown, a secondary static blasting device includes a central column 1, a receiving box 3, a chassis 4, a sealing mechanism 22, a stiffening plate 10, a splitting blade mechanism 23, and a heating wire 13. The receiving box 3 is installed on the upper part of the chassis 4. The central column 1 is inserted into the center of the receiving box 3 and passes through the lower part of the chassis 4. Several sealing mechanisms 22 are provided on the circumference of the chassis 4. Several stiffening plates 10 are provided on the lower circumference of the chassis 4. The splitting blade mechanism 23 is fitted into the lower part of the central column 1. A central column inner bladder 19 is provided inside the central column 1. The heating wire 13 is embedded in the central column inner bladder 19. An injection hole 20 is provided at the center of the central column 1.

[0034] Furthermore, the upper part of the central column 1 is provided with two mutually symmetrical central column extension plates 2.

[0035] Furthermore, the splitting blade mechanism 23 includes an annular rotating shaft 17 and a plurality of splitting blades 12. The upper part of the splitting blade 12 is provided with a rotating shaft hole 16, and the plurality of splitting blades 12 are mounted on the annular rotating shaft 17 through the rotating shaft hole 16.

[0036] Furthermore, a connecting plate 15 is connected between two adjacent splitting blades 12 on an annular rotating shaft 17, and a lifting plate 18 is connected to the connecting plate 15.

[0037] Furthermore, the upper part of the lifting plate 18 extends through the housing 3 and is connected to a lifting platform 14.

[0038] Furthermore, the sealing mechanism 22 includes a knob 7, a drive screw 6, a push-pull rod 8, and a sealing plate 9. One end of the drive screw 6 is connected to the knob 7, and the other end of the drive screw 6 is connected to one end of the push-pull rod 8 via a tenon-and-mortise connection. The other end of the push-pull rod 8 is connected to the sealing plate 9.

[0039] Furthermore, the drive screw 6 is threadedly connected to the threaded hole 5 of the chassis 4.

[0040] Furthermore, the outer edge of the stiffening plate 10 is provided with serrations.

[0041] Furthermore, the lower part of the stiffening plate 10 is connected to the foot 11.

[0042] Furthermore, the stiffening plate 10 and the splitting blade 12 are arranged at intervals and cross each other.

[0043] Compared with the prior art, the present invention has the following advantages:

[0044] (1) The present invention is provided with a blade-shaped splitting blade mechanism 23, which can split rocks more effectively. It is provided with 6 splitting blades 12, which is conducive to multi-directional rock fragmentation and optimizes the splitting and blasting effect.

[0045] (2) The present invention integrates the function of expanding agent injection, which can directly inject expanding agent without changing the construction equipment, thereby improving construction efficiency and simplifying the construction process.

[0046] (3) After the expansion agent is injected, the friction between the stiffening plate 19 and the rock hole 21 is increased by the expansion effect of the expansion agent, preventing the device from being pushed out of the rock hole 21 by the expansion agent. After the device covers the rock hole 21 and closes the sealing plate 9, automatic sealing is achieved, which enhances the expansion blasting effect.

[0047] (4) After the splitting blast, a second static blast with an expanding agent is carried out. The secondary blast can effectively break hard rock. The expanding agent enters the splitting cracks, which can achieve a large-scale secondary blast. The heating wire is heated, and the temperature rises to accelerate the expansion reaction of the expanding agent.

[0048] (5) It realizes the integrated process of "splitting, injection, sealing, heating and blasting", and the device has a comprehensive function.

[0049] Working principle:

[0050] The central column 1 runs vertically through the entire device, with a horizontal central column support plate 2 at its upper end. This facilitates the movement of the central column 1 after blasting operations, allowing for adjustments and cleaning of the device. The central column 1 has a uniform radial dimension at the top and an increased radial dimension at the bottom, with a trapezoidal cross-section. Six splitting blades 12 are evenly arranged around the lower half of the central column 1. The outer edges of the splitting blades 12 are ground with vertical cutting edges for splitting rock. During splitting, the central column 1 is raised. Due to the larger radial dimension at the bottom of the central column 1, the splitting blades 12 expand outward, easily splitting the rock at the cutting edges and forming cracks. The splitting blades 12... The part is arc-shaped, with concentric circular pivot holes 16 inside. A ring-shaped pivot 17 passes through the pivot holes 16 to position and connect the splitting blades 12. When the splitting blades 12 expand and split the rock, they can rotate around the ring-shaped pivot 17. Two lifting plates 18 are evenly distributed between the central column 1 and the splitting blades 12. Six connecting plates 15 are evenly distributed around the bottom of the lifting plates 18 to separate the six splitting blades 12 and connect the ring-shaped pivot 17 and the lifting plates 18. The top of the lifting plates 18 has a horizontal lifting platform 14 for moving the lifting plates 18, thereby driving the splitting blades 12 to move up and down.

[0051] The inner core of the central column 1 has an injection hole 20 for injecting an expanding agent. After the splitting blade 12 splits the rock, a crack is formed inside the rock. First, the splitting blade 12 is lifted into the receiving box 3, and then an expanding agent is injected into it. The expanding agent flows into the crack and performs a secondary blast, which increases the degree and range of blasting. It has considerable effect on both hard rock blasting and large-scale rock blasting.

[0052] The central column 1 contains an inner bladder 19, within which heating wires 13 are distributed. The heating wires 13 are arranged vertically in a straight line in the upper half of the central column 1, extending out from the top of the central column 1 to connect to external electrical equipment. In the lower half of the central column 1, the heating wires 13 are spirally stacked. After the expansion agent is injected, the heating wires 13 are connected, allowing heat transfer through the central column 1 to accelerate the expansion reaction rate of the expansion agent and reduce the explosion time. This also requires the central column 1 and the heating wires 13 to have good thermal conductivity.

[0053] The upper half of the central column 1 is surrounded by the receiving box 3, and there is a round hole at the center of its top for the central column 1 to pass through. The top of the receiving box 3 has an arc-shaped opening for the lifting plate 18 to pass through vertically. The lower part of the receiving box 3 has a base 4, which is relatively thick and hollow. The space inside the receiving box 3 is sufficient to accommodate the splitting blade 12. The base 4 is connected to a stiffening plate 10, which is arranged vertically. Its horizontal cross-section is arc-shaped and its outer surface is serrated. During the expansion process of the expanding agent, the expansion force pushes the stiffening plate 10 outward, increasing the normal pressure exerted by the stiffening plate 10 on the inner surface of the rock hole 21. Simultaneously, the serrated surface increases the friction between the stiffening plate 10 and the inner surface of the rock hole 21, preventing the expanding agent from being pushed out of the device during expansion and weakening the expansion blasting effect. The bottom of the stiffening plate 10 has horizontally distributed feet 11, which allow the device to bear part of the weight of the expanding agent, preventing it from being pushed out of the device when full. To ensure that the trajectory of the splitting blade 12 retracting into the receiving box 3 is unobstructed, the stiffening plate 10 and the splitting blade 12 do not overlap vertically in space. Figure 5 As shown.

[0054] like Figures 1 to 4 As shown, the chassis 4 is hollow, with three threaded holes 5 evenly distributed along its edge. Three sealing plates 9, arranged in a fan shape, are evenly distributed inside the chassis 4 and can move horizontally radially within it, tightly surrounding and fitting the central column 1. A push-pull rod 8 extends radially outward from the center of each sealing plate 9. A drive housing 6 surrounds the push-pull rod 8, and the push-pull rod 8 and drive housing 6 are connected by a tenon and mortise joint for limiting and driving. The push-pull rod 8 has a male tenon structure, and the drive housing 6 has a female tenon structure. The drive housing 6 extends from the threaded hole 5, and its outer surface is threaded to fit the threaded hole 5. A knob 7 is located at the outer end of the drive housing 6. Rotating the knob 7 allows the drive housing 6 to move in and out of the threaded hole 5. The drive housing 6, relying on the tenon and mortise structure, drives the push-pull rod 8 to move, further... The step moves the sealing plate 9, enabling it to open and close. When the expanding agent is injected, the splitting blade 12 is lifted into the receiving box 3, and the sealing plate 9 is closed to fit tightly against the central column 1, preventing the splitting blade 12 from falling and also achieving the sealing function. When the rock hole 21 is not facing upward, the splitting blade 12 will automatically fall into the receiving box 3 due to gravity when splitting the rock. Therefore, closing the sealing plate 9 to fit against the lifting plate 18 can support the connecting plate 15, thereby supporting the splitting blade 12 and preventing it from falling.

[0055] In operation, a rock hole 21 is first drilled in the rock medium 22. Then, the stiffening plate 10 of the blasting device is screwed into the rock hole 21. Next, the central column 1 is pulled up. Since the lower end of the central column 1 is trapezoidal, it will push open the splitting blade 12 during the pulling process. The splitting blade 12 will blast the rock medium 22 once during the pushing process. Then, the sealing plate 9 of the sealing mechanism 23 will seal the cracks in the rock medium 22. After sealing, the expanding agent is injected into the central column 1 through the injection hole 21. At the same time, the heating wire 13 is energized to heat it, which accelerates the expansion effect and speed of the expanding agent. The expansion of the expanding agent will increase the degree of blasting of the rock medium 22 by the splitting blade 12, thereby achieving a secondary blast.

[0056] This invention is applicable to hard rock excavation and large-scale blasting operations, requiring the device material to have high hardness; it realizes an integrated secondary static blasting process of "splitting, injection, sealing, heating, and blasting", which can adapt to rock drilling and blasting in all directions and can effectively solve the problems of hard rock excavation or large-scale blasting in actual engineering; the device has a simple structure, is easy to operate and clean, and can effectively reduce noise pollution during construction.

[0057] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A secondary static blasting device, characterized in that: The system includes a central column (1), a receiving box (3), a chassis (4), a sealing mechanism (22), a stiffening plate (10), a splitting blade mechanism (23), and a heating wire (13). The receiving box (3) is installed on the upper part of the chassis (4). The central column (1) is inserted into the center of the receiving box (3) and passes through the lower part of the chassis (4). Several sealing mechanisms (22) are provided on the circumference of the chassis (4). Several stiffening plates (10) are provided on the lower circumference of the chassis (4). The splitting blade mechanism (23) is fitted into the lower part of the central column (1). A central column inner bladder (19) is provided inside the central column (1). The heating wire (13) is embedded in the central column inner bladder (19). An injection hole (20) is provided in the center of the central column (1). Two symmetrical central column plates (2) are provided on the upper part of the central column (1). The splitting blade mechanism... (23) Includes an annular rotating shaft (17) and several splitting blades (12). The upper part of the splitting blades (12) is provided with a rotating shaft hole (16). Several splitting blades (12) are installed on the annular rotating shaft (17) through the rotating shaft hole (16). A connecting plate (15) is connected between two adjacent splitting blades (12) on the annular rotating shaft (17). The connecting plate (15) is connected to a lifting plate (18). The upper part of the lifting plate (18) passes through the receiving box (3) and is connected to a lifting plate (14). The sealing mechanism (22) includes a knob (7), a drive screw (6), a push-pull rod (8) and a sealing plate (9). One end of the drive screw (6) is connected to the knob (7). The other end of the drive screw (6) is connected to one end of the push-pull rod (8) through a tenon and mortise connection. The other end of the push-pull rod (8) is connected to the sealing plate (9).

2. The secondary static blasting device as described in claim 1, characterized in that: The drive screw (6) is threadedly connected to the threaded hole (5) of the chassis (4).

3. The secondary static blasting device as described in claim 2, characterized in that: The outer edge of the stiffening plate (10) is provided with serrations.

4. The secondary static blasting device as described in claim 1, characterized in that: The lower part of the stiffening plate (10) is connected to the foot (11).

5. The secondary static blasting device as described in claim 3, characterized in that: The stiffening plate (10) and the splitting blade (12) are arranged at intervals and cross each other.

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