Biomass pellet type fracturing rock breaking tube structure

Abstract

The utility model discloses the technical field's biomass granule type fracturing rock pipe structure of rock breaking, including the flexible film cover of both ends closed, the flexible film cover is filled with the paper roll and biomass granule from bottom to upward interval in, still include from the liquid filling guide pipe, electric ignition device and exhaust pipe of its inside of penetrating into the top of flexible film cover. Through adopting biomass granule as the adsorption combustion agent of fracturing rock pipe, the problem of relatively high price of paper roll, and relatively low explosive force etc. is solved. And the addition of a small amount of paper roll as an igniter, ensure the quick ignition of biomass granule, the liquid filling effect is ensured while the liquid filling guide pipe ring support frame improves the rock breaking effect.

Description

Technical Field

[0001] This utility model belongs to the field of rock crushing technology, specifically relating to a biomass particle-type rock-breaking pipe structure. Background Technology

[0002] Rock breaking technology is crucial in engineering fields such as mining and tunnel excavation. While traditional explosive blasting technology offers high energy, efficiency, and low cost, it suffers from numerous drawbacks. The blasting process generates significant vibration, noise, and flyrock, resulting in large and uncontrollable dust emissions from the ore powder. The violent reaction of the explosives produces toxic and harmful gases, posing risks to safety and environmental protection around the mine. In densely populated areas or regions with stringent environmental requirements, the use of traditional explosive blasting technology is severely limited. Mechanical rock breaking technologies, such as hydraulic rock hammers, offer good safety, eliminate flyrock, and are flexible in use, but they suffer from high operating costs, low rock breaking efficiency, and fuel consumption and exhaust emissions, which are also detrimental to environmental protection.

[0003] Against this backdrop, liquid gas rock-breaking technology has emerged as a promising new technology. Taking patent application CN117892045B as an example, this patent uses pure liquid oxygen or a liquid nitrogen-oxygen mixture, which undergoes physical phase change, vaporization, and expansion to break rocks. Its rock-breaking system mainly consists of liquid gas, an igniter, an energy storage cylinder inside the borehole, an ignition element, and an electrical network. The energy storage cylinder inside the borehole often uses combustible paper as an absorbent. With the aid of liquid oxygen, the ignition element ignites the combustible paper, forming a combustion wave front that rapidly propagates and burns violently, releasing a large amount of heat that causes the liquid gas to undergo an instantaneous phase change and expand, generating a high-pressure load to break the rock.

[0004] However, existing rock-breaking tubes using loosely rolled paper as an adsorbent still have several problems. Firstly, the price of rolled paper is relatively high, and large-scale use would significantly increase rock-breaking costs. Secondly, the production of rolled paper consumes a large amount of energy and industrial water, and generates a significant amount of industrial wastewater, which contradicts the current green and low-carbon development concept. Furthermore, as an adsorbent, rolled paper also exhibits relatively low explosive power in practical applications, making it difficult to fully meet the needs of some complex engineering scenarios requiring high rock-breaking force. Utility Model Content

[0005] The purpose of this invention is to provide a biomass pellet-type rock-breaking tube structure, which has low cost and relatively high explosive power.

[0006] The technical solution adopted by this utility model is a biomass pellet type rock-breaking tube structure, including a flexible membrane sleeve closed at both ends, and the flexible membrane sleeve is filled with rolled paper and biomass pellets from bottom to top at intervals.

[0007] It also includes a filling conduit, an electric ignition device, and an exhaust pipe that extend from the top of the flexible membrane sleeve into its interior.

[0008] The features of this utility model also include:

[0009] It also includes an annular support frame, the outer contour of which contacts the inner wall of the flexible membrane sleeve, and a circular hole is provided in the middle of the annular support frame for the filling conduit to pass through.

[0010] There are several annular support frames arranged along the axial direction of the flexible membrane sleeve, with biomass pellets placed at intervals of 0.5-1m.

[0011] The spacing between adjacent rolls of paper is 2-3m.

[0012] The electric ignition device includes wires and igniters of the same number as the roll of paper. The igniters are evenly fixed on the wires, and each igniter is in contact with the corresponding roll of paper.

[0013] Biomass pellets are made from the roots, stems, leaves, vines, and straw of various plants, with a particle size of 1-4 mm.

[0014] A fixing strap is wrapped around the outer wall of the flexible film sleeve that comes into contact with the roll paper.

[0015] The filling conduit is J-shaped.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes biomass pellets as the adsorbent for the rock-breaking tube. Biomass pellets are relatively inexpensive, addressing the problems of relatively high paper prices, the energy and water consumption required for paper production leading to significant industrial wastewater generation, and relatively low explosive power. A small amount of paper is added as an igniter, ensuring rapid ignition of the biomass pellets while preventing their settling and ensuring uniform distribution. Furthermore, a ring-shaped support frame prevents excessive bending or misalignment with the rock-breaking tube axis during manufacturing, transportation, and installation, ensuring effective filling and improving rock-breaking efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the AA-direction section;

[0020] In the diagram, 1 is the flexible membrane sleeve, 2 is the liquid filling conduit, 3 is the paper roll, 4 is the biomass pellet, 5 is the electric ignition device, 6 is the annular support frame, 7 is the exhaust pipe, and 8 is the sealing filler. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] The biomass pellet-type fracturing rock pipe structure disclosed in this utility model, such as Figure 1 As shown, it includes a flexible membrane sleeve 1, a liquid filling conduit 2, an electric ignition device 5, and an exhaust pipe 7.

[0024] The flexible membrane sleeve 1 has a cylindrical structure closed at both ends, and its interior is filled with rolled paper 3 and biomass pellets 4. The rolled paper 3 and biomass pellets 4 are arranged alternately from the bottom of the flexible membrane sleeve 1. The rolled paper 3 acts as an ignition agent and has flammable properties, which can quickly ignite the biomass pellets 4 after ignition. In order to ensure the stable filling and reasonable distribution of the rolled paper 3 and biomass pellets 4, the rolled paper 3 can be pre-rolled according to the size specifications of the flexible membrane sleeve 1, and then alternately filled into the flexible membrane sleeve 1 with the biomass pellets 4.

[0025] One end of the filling conduit 2 enters the flexible membrane sleeve 1 from the top, passes through the biomass pellets 4 and the roll of paper 3, and extends to the bottom of the flexible membrane sleeve 1. The other end of the conduit extends out of the flexible membrane sleeve 1 and is connected to an inflation head for conveying liquid gas into the flexible membrane sleeve 1. The wall of the filling conduit 2 has several small holes evenly distributed to uniformly disperse the liquid gas. The liquid gas is liquid oxygen or liquid nitrogen.

[0026] One end of the exhaust pipe 7 passes through the top of the flexible membrane sleeve 1 and extends into its interior, while the other end extends out of the flexible membrane sleeve 1. It is used to discharge the air inside the flexible membrane sleeve 1 before rock breaking operations to ensure that the interior is a mixed environment of liquid gas and combustibles. After rock breaking is completed, the residual gas inside is discharged to facilitate the subsequent recovery and treatment of the rock breaking pipe.

[0027] The electric ignition device 5 is in close contact with the paper roll 3. The electric ignition device 5 is powered by an external power source or an energy storage module and can generate a high-temperature spark after receiving a trigger signal to ignite the paper roll 3.

[0028] In use, an external liquid gas supply device is connected via the filling conduit 2 to deliver liquid gas into the flexible membrane sleeve 1. The liquid gas rapidly diffuses through several small holes in the wall of the filling conduit 2, filling the entire interior of the flexible membrane sleeve 1. The paper roll 3 and biomass pellets 4 inside the flexible membrane sleeve 1 first fully absorb or adsorb the liquid gas through their own pores, and then the liquid gas fully fills the gaps between the paper roll 3 and biomass pellets 4. After the liquid gas is fully filled, an ignition signal is sent to the electric ignition device 5 through an external excitation device. The electric ignition device 5 generates a spark, igniting the paper roll 3. The heat released by the burning paper roll 3 is rapidly transferred to the adjacent biomass pellets 4, causing the biomass pellets 4 to burn violently. The large amount of heat released by the burning biomass pellets 4 causes the liquid gas to undergo an instantaneous phase change and expand, generating a high-pressure load to break the rock.

[0029] Example 2

[0030] Based on Example 1, the biomass pellet-type fracturing rock pipe structure disclosed in this example also includes a ring support frame 6, such as... Figure 2 As shown, the annular support frame 6 is a flat ring, and its outer circle contour fits tightly with the inner wall of the flexible membrane sleeve 1. While ensuring that the flexible membrane sleeve 1 can be smoothly installed, it can effectively limit its own movement in the radial direction. The size of the perforation in the center is adapted to the outer diameter of the filling conduit 2, and the two form a gap fit, which can ensure that the filling conduit 2 can pass through smoothly and provide a certain support force.

[0031] Furthermore, several annular support frames 6 are provided, evenly placed within the biomass pellets 4 along the axial direction of the flexible membrane sleeve 1. The spacing between each annular support frame 6 can be adjusted according to actual engineering requirements and the length of the flexible membrane sleeve 1, typically controlled within the range of 0.5-1m. Through the synergistic effect of multiple annular support frames 6, multi-point support is formed for the liquid filling conduit 2, further enhancing the stability of the liquid filling conduit 2 within the flexible membrane sleeve 1, providing a reliable guarantee for uniform diffusion of liquid gas, uniform and sufficient adsorption of liquid gas by combustibles, and efficient rock breaking.

[0032] Furthermore, the annular support frame 6 is made of low-density, high-strength plastic material, such as polypropylene (PP) or polycarbonate (PC). The annular support frame 6 can prevent the liquid filling conduit 2 from being excessively bent or from being significantly offset from the axis of the fracturing rock pipe during the manufacturing, transportation, and installation of the fracturing rock pipe, ensuring the unobstructed flow of the liquid filling conduit 2, guaranteeing the stable delivery of liquid gas, and thus improving the liquid filling effect.

[0033] In use, the filling conduit 2 is inserted from the top of the flexible membrane sleeve 1 and then passes through the perforations of each annular support frame 6 in sequence. The annular support frame 6, by contacting the inner wall of the flexible membrane sleeve 1 and limiting the position of the filling conduit 2, can effectively ensure the stability of the filling conduit 2 within the flexible membrane sleeve 1. Even under the squeezing generated during the filling of materials such as biomass pellets 4 and paper rolls 3, or under the impact force during the transportation of liquid gas, it can prevent the filling conduit 2 from shifting or bending.

[0034] Example 3

[0035] Based on Example 2, the biomass pellet-type rock-breaking tube structure disclosed in this example sets the spacing between adjacent rolls of paper 3 to 2-3m. This spacing range can ensure that the flame and heat generated by the rolls of paper 3 as igniters can be quickly and effectively transferred to the adjacent biomass pellets 4 after ignition, so as to achieve full combustion of the biomass pellets 4 and form a continuous and stable deflagration effect. It can also avoid the increase in material cost and the excessive concentration of combustibles inside the rock-breaking tube due to the small spacing between the rolls of paper 3, which would cause a sudden increase in local pressure and affect the uniformity and controllability of rock breaking.

[0036] Furthermore, adhesive tape is wrapped around the outer wall of the flexible membrane sleeve 1 that contacts the paper roll 3. This wrapping effectively secures the paper roll 3, preventing displacement or loosening during the filling of biomass pellets 4 or transportation. Simultaneously, the binding force exerted by the tape on the flexible membrane sleeve 1 creates a barrier structure within it, preventing the biomass pellets 4 from accumulating downwards due to gravity and promoting uniform distribution within the sleeve. This uniform distribution allows for sufficient contact between the biomass pellets 4 and the paper roll 3. When the electric ignition device 5 ignites the paper roll 3, heat is transferred to the biomass pellets 4 more quickly and evenly, achieving efficient combustion and generating a stable and powerful rock-breaking impact force, significantly improving rock-breaking efficiency and effectiveness.

[0037] Example 4

[0038] Based on Example 3, the biomass pellet type fracturing rock-breaking pipe structure disclosed in this example includes an electric ignition device 5 comprising a wire and several igniters. The several igniters are uniformly fixed along the length of the wire, and the igniters are distributed at equal intervals to ensure that the rolls of paper 3 at different positions inside the flexible membrane sleeve 1 are in contact with one igniter.

[0039] By evenly arranging multiple igniters on the conductor, the reliability and uniformity of ignition can be significantly improved. When the external control device sends an ignition signal, the current is transmitted along the conductor to each igniter, causing the igniters to generate sparks simultaneously, igniting the paper roll 3 at multiple points. This not only accelerates the ignition speed of the paper roll 3 but also ensures that the biomass pellets 4 inside the flexible membrane sleeve 1 are evenly ignited in a shorter time, achieving rapid and complete combustion, generating a stronger and more stable rock-breaking impact force, further improving the rock-breaking efficiency and effect of the biomass pellet-type fracturing rock-breaking pipe, and reducing the probability of problems such as incomplete combustion and poor rock-breaking effect that may occur due to single-point ignition.

[0040] Example 5

[0041] Based on Example 4, this example discloses a biomass pellet-type fracture-inducing rock-breaking pipe structure. The biomass pellets 4 are made from agricultural or forestry waste such as roots, stems, leaves, vines, and straw of various plants. These raw materials are processed through crushing, drying, and compression molding to form pellets with a particle size of 1mm-4mm. The biomass pellets 4 have a large specific surface area, enabling them to adsorb more liquid gas and burn more quickly and completely.

[0042] Example 6

[0043] Based on Example 4, the biomass pellet-type fracturing rock-breaking pipe structure disclosed in this example has a J-shaped liquid-filling conduit 2 with an elbow located at the bottom of the flexible membrane sleeve 1. This elbow structure can fix and support the roll of paper 3 at the bottom.

[0044] Rock breaking using the biomass pellet-type fracturing rock-breaking pipe structure of this utility model includes the following steps:

[0045] Step 1: Drill multiple holes in the target rock mass and install biomass pellet-type rock-breaking pipes into the holes;

[0046] Step 2: Install the sealing plug 8 for sealing, connect the liquid filling conduit 2 to the external gas distribution network of the borehole, and connect the wire to the borehole network excitation wire;

[0047] Step 3: Fill the fractured rock tube with liquid gas through the filling conduit 2;

[0048] Step 4: Personnel evacuate to a safe area and trigger the electric ignition device 5. Multiple igniters of the electric ignition device 5 work simultaneously to ignite the roll of paper 3, which in turn ignites the biomass particles 4. The combustion of the biomass particles 4 releases a large amount of heat, causing the liquid gas to undergo an instantaneous phase change and expand, generating a high-pressure load to break the rock.

[0049] This invention utilizes biomass pellets as the adsorbent for the rock-breaking tube. Biomass pellets are relatively inexpensive, addressing the problems of relatively high paper prices, the energy and water consumption required for paper production leading to significant industrial wastewater generation, and relatively low explosive power. A small amount of paper is added as an igniter, ensuring rapid ignition of the biomass pellets while preventing their settling and ensuring uniform distribution. Furthermore, a ring-shaped support frame prevents excessive bending or misalignment with the rock-breaking tube axis during manufacturing, transportation, and installation, ensuring effective filling and improving rock-breaking efficiency.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A biomass pellet-type fracturing rock pipe structure, characterized in that, It includes a flexible membrane sleeve (1) closed at both ends, and the flexible membrane sleeve (1) is filled with roll paper (3) and biomass pellets (4) from bottom to top. It also includes a filling conduit (2) that extends from the top of the flexible membrane sleeve (1) into its interior, an electric ignition device (5), and an exhaust pipe (7).

2. The biomass pellet-type fracturing rock pipe structure according to claim 1, characterized in that, It also includes an annular support frame (6), the outer contour of which contacts the inner wall of the flexible membrane sleeve (1), and the annular support frame (6) has a circular hole in the middle for the filling conduit (2) to pass through.

3. The biomass pellet-type fracturing rock pipe structure according to claim 2, characterized in that, There are several annular support frames (6), which are arranged along the axial direction of the flexible membrane sleeve (1) and are placed in the biomass pellets (4) at intervals of 0.5-1m.

4. The biomass pellet-type fracturing rock pipe structure according to claim 1, characterized in that, The spacing between adjacent rolls of paper (3) is 2-3m.

5. The biomass pellet-type fracturing rock pipe structure according to claim 1, characterized in that, The electric ignition device (5) includes a wire and an igniter of the same number as the roll of paper (3). The igniters are evenly fixed on the wire, and each igniter is in contact with the corresponding roll of paper (3).

6. The biomass pellet-type fracturing rock pipe structure according to claim 1, characterized in that, The biomass pellets (4) are made from the roots, stems, leaves, vines and straw of various plants, with a particle size of 1~4 mm.

7. The biomass pellet-type fracturing rock pipe structure according to claim 1, characterized in that, A fixing band is wrapped around the outer wall of the flexible film sleeve (1) that is in contact with the roll of paper (3).

8. The biomass pellet-type fracturing rock pipe structure according to claim 1, characterized in that, The filling conduit (2) is J-shaped.

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