CN215169979U - Phase-change fracturing rock breaking system filled with liquid carbon dioxide in hole - Google Patents
Phase-change fracturing rock breaking system filled with liquid carbon dioxide in hole Download PDFInfo
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- CN215169979U CN215169979U CN202121032155.5U CN202121032155U CN215169979U CN 215169979 U CN215169979 U CN 215169979U CN 202121032155 U CN202121032155 U CN 202121032155U CN 215169979 U CN215169979 U CN 215169979U
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Abstract
The utility model belongs to the technical field of rock blasting construction equipment, in particular to a rock breaking system with a hole filled with liquid carbon dioxide phase change cracking, which comprises a vehicle-mounted movable liquid carbon dioxide filling system, a high-pressure air pipe, a ball valve switch, a plug quick connector, a stainless steel air pipe and a hole filled with liquid carbon dioxide phase change cracking device; the utility model has the advantages of it is following: firstly, the air inflation outside the hole is changed into the air inflation inside the hole, so that the construction operation is safer; secondly, the filling system is compatible with the original equipment, only a filling pipeline connector needs to be replaced, the vehicle-mounted filling system can be mobile, the filling pipeline can be extended according to the field situation, and the filling system can adapt to the requirements of different working conditions.
Description
Technical Field
The utility model belongs to the technical field of rock blasting construction equipment, concretely relates to downthehole filling liquid carbon dioxide phase transition fracturing rock breaking system.
Background
CO2Blasting started in the fifties of the twentieth century and developed in the united states in the eighties, and was developed specifically for coal mining faces of high gas mines, mainly for the purpose of avoiding explosion accidents caused by flames produced by explosive blasting. CO 22The blasting has the advantages of moderate power, small blasting vibration damage and the like because no explosive is used in the blasting, and the blasting gradually enters the visual field of people as a substitute product for breaking rock by the explosive, and domestic CO is2Blasting equipment manufacturers gradually emerge, the construction cost is further reduced, and the blasting equipment is widely applied to rock breaking projects such as mine exploitation, earthwork, foundation pit and tunnel excavation and is still in the continuous growth and development stage.
CO2The principle of the blasting technology is that liquid carbon dioxide is sealed in a metal tube, the pressure in the metal tube is 8-10MPa, a heater is triggered by using battery voltage to generate a large amount of heat, so that the liquid carbon dioxide is instantly gasified (when the temperature exceeds 31.2 ℃, the liquid carbon dioxide can be rapidly gasified no matter the pressure is large), the volume is enlarged by 600 times, the pressure in the pipeline is rapidly increased until a constant-pressure shear slice or the metal tube is broken, strong impact force is instantly generated, and the liquid carbon dioxide is ejected along natural cracks of a rock body or cracks caused by the impact and is pushed away from a main body, so that the aim of blasting is fulfilled. The fracturing devices are connected in seriesAnd the connection can realize the simultaneous directional fracturing of multiple points.
Current CO2The blasting technology mainly comprises three types: firstly, the construction method is sent and split to outer inflation circulating pipe of hole, send and split the pipe and use the seamless steel pipe of high strength stainless steel, can used repeatedly, utilizes gasified high-pressure carbon dioxide to break the constant pressure and cut the section during the construction, and external acting, the advantage is that the consumptive material is with low costs, and broken rock economic nature is good, and the shortcoming is that sending and splitting the pipe heaviness, needs the supplementary construction of machinery, produces easily and flies the pipe, sends when hard rock blasting construction and splits the pipe yielding damage. The other is a construction method of the disposable fracturing pipe by inflating outside the hole, the fracturing pipe adopts a fluid metal pipe with the tensile strength of 40MP, the fracturing pipe is broken by gasified high-pressure carbon dioxide during construction, and the construction method does work externally, has the advantages of convenient construction, is not limited by terrain conditions and equipment, can realize manual large-scale operation, and has the defects of multiple manual contact links with the body to be exploded, high safety risk, large influence on construction safety by high temperature in summer, difficult treatment of non-explosion pipe, limited filling capacity of the fracturing pipe and limited power of a single pipe from the safety viewpoint, and liquid carbon dioxide, transportation and pipe laying are required to be contacted with the body to be exploded. The construction method of the disposable fracturing pipe inflated in the hole is mainly different from the construction method of the disposable fracturing pipe inflated outside the hole in that an inflation link is placed after pipe burying, so that direct contact between a person and a body to be exploded is avoided, the construction safety is improved, the existing main problem is that field assembly of the fracturing pipe is troublesome, the inflation airtightness is not guaranteed after pipe burying, the gas leakage waste pipe rate is high in construction, a filling device and a gas tank need to be transported to the field during construction, the filling device and the gas tank need to be matched, the construction site is limited greatly, and the construction application is few at present.
SUMMERY OF THE UTILITY MODEL
The utility model discloses on the basis of the broken rock technique of current carbon dioxide and equipment, provided an downthehole filling liquid carbon dioxide phase transition fracturing broken rock system.
The utility model adopts the technical proposal that: a phase change fracturing rock breaking system filled with liquid carbon dioxide in a hole comprises: vehicle-mounted movable liquid carbon dioxide filling system, high-pressure air pipe, ball valve switch, plug quick connector, stainless steel air pipe and hole fillingThe phase change cracking device for liquid carbon dioxide comprises a loading vehicle, a liquid storage tank, and CO2A filling machine and a generator, wherein the vehicle-mounted movable liquid carbon dioxide filling system is used for providing a movable and field-inflated gas source and an initiation power supply for filling the liquid carbon dioxide phase change cracking device in the hole, and the high-pressure gas pipe is used for connecting the ball valve switch and the CO2The device comprises a filling machine, a ball valve switch, a quick plug-in connector, a stainless steel gas pipe, a liquid carbon dioxide phase change cracking device and a liquid carbon dioxide phase change cracking device, wherein the ball valve switch is used for controlling the on-off of a gas circuit; CO in vehicle-mounted movable liquid carbon dioxide filling system2The liquid filling machine is connected with one end of the ball valve switch through a high-pressure air pipe, the other end of the ball valve switch is connected with the quick plug connector, and the quick plug connector is connected with the in-hole filling liquid carbon dioxide phase change cracking device through a stainless steel air pipe.
Further, the liquid carbon dioxide phase change cracking device filled in the hole comprises a cracking tube 1, a heating tube 2, an end cover 3, a heating tube locking nut 4, an air duct 5, a connecting joint 6, a one-way valve 7, an electric lead 8, an electric ignition head 9, a carbon dioxide heating tube medicament 10 and liquid carbon dioxide 11; the cracking tube 1 is a hollow cylinder with one open end; the heating tube 2 is also a hollow cylinder with one open end, and the diameter of the cylinder is smaller than that of the cracking tube 1; the heating tube 2 and the cracking tube 1 are coaxially arranged, and one open ends of the heating tube and the cracking tube are flush; the end cover 3 is used for sealing the cracking tube 1; the heating tube locking nut 4 is used for fixing the heating tube 2, and a small hole is formed in the center of the heating tube locking nut and used for leading out an electric lead 8; the gas guide tube 5, the connecting joint 6 and the one-way valve 7 jointly form a liquid carbon dioxide inflation inlet for filling liquid carbon dioxide 11 into the fracturing tube 1, wherein the gas guide tube 5 is used for connecting a stainless steel gas tube, the connecting joint 6 is used for fixing the gas guide tube 5 on the end cover 3, the one-way valve 7 is used for forming a one-way flow channel of the liquid carbon dioxide, and when the liquid carbon dioxide filled in the fracturing tube 1 reaches a certain pressure, the one-way valve 7 is automatically closed; the heating tube 2 is filled with carbon dioxide heating tube agent 10, and the agent generates heat under the action of the electric lead 8 and the electric ignition head 9 to detonate the liquid carbon dioxide in the cracking tube 1.
Further, the check valve 7 comprises a ferrule type pipe joint body 71 and a conical valve core 72, when the liquid carbon dioxide filled in the fracturing pipe 1 reaches a certain pressure, the conical valve core 72 is jacked into a conical cavity of the ferrule type pipe joint body 71 under the action of the pressure, and the check valve 7 is automatically closed.
Further, the check valve 7 further comprises a sealing ring 73, and the sealing ring 73 is used for achieving a better sealing effect.
Further, the liquid storage tank is a 499L special gas storage tank for carbon dioxide fracturing, which is commonly used in the market.
Further, the generator is a 5KW three-phase generator.
Furthermore, plug quick-operation joint divide into female head and public head, and female head is fixed on the stainless steel trachea, and public head and ball valve switch are connected.
Compared with the prior art, the utility model has the advantages of it is following:
1. the method has the advantages that the hole external inflation is changed into the hole internal inflation, the construction operation is safer, the largest dangerous accident link of the carbon dioxide static explosion construction is that the liquid carbon dioxide is filled in the cracking device to be in a to-be-exploded state, and the pipe is filled after the pipe is buried;
2. the filling system is compatible with the original equipment, only the filling pipeline connector needs to be replaced, the vehicle-mounted filling pipeline can be mobile, the filling pipeline can be extended according to the field condition, and the filling system can adapt to the requirements of different working conditions.
Drawings
FIG. 1 is a structural diagram of a phase-change fracturing rock breaking system filled with liquid carbon dioxide in a hole;
FIG. 2 is a schematic structural diagram of a phase change cracker filled with liquid carbon dioxide in a hole;
fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
Fig. 1 is the utility model discloses an downthehole filling liquid carbon dioxide phase transition fracturing rock breaking system structure constitutes the picture, include: the device comprises a vehicle-mounted movable liquid carbon dioxide filling system, a high-pressure air pipe, a ball valve switch, a plug quick connector, a stainless steel air pipe and a phase change cracking device filled with liquid carbon dioxide in a hole.
FIG. 2 is a schematic structural diagram of a phase change cracker filled with liquid carbon dioxide in a hole; fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Adopt the utility model discloses a working process as follows:
(1) drilling a blast hole matched with the type of the fracturing unit in the selected working face;
(2) after being assembled with a stainless steel air pipe, the fracturing device is placed into a blast hole and is tightly packed with millstone or rock powder with the diameter of 5 mm;
(3) connecting a female head of the plug quick connector to a stainless steel air pipe;
(4) connecting the male head, the ball valve switch and the high-pressure air pipe of the assembled plug quick connector to CO of a vehicle-mounted movable liquid carbon dioxide filling system2Filling on a filling machine;
(5) starting generator to supply CO2Electrifying the filling machine until the male head of the plug quick connector emits white gas (in order to exhaust the air in the inflation pipeline), inserting the male head into the female head, and filling the fracturing device with CO2；
(6) After the fracturing device is filled with liquid carbon dioxide, closing the spherical valve switch, pulling out the male head of the plug-in quick connector, and continuously filling the next fracturing device;
(7) and after all the fracturing devices on the working face are completely filled, networking the fracturing devices for detonation.
Claims (7)
1. A phase-change fracturing rock breaking system filled with liquid carbon dioxide in a hole is characterized in thatThe method comprises the following steps: the device comprises a vehicle-mounted movable liquid carbon dioxide filling system, a high-pressure air pipe, a ball valve switch, a plug quick connector, a stainless steel air pipe and a phase change cracking device for filling liquid carbon dioxide into holes, wherein the vehicle-mounted movable liquid carbon dioxide filling system comprises a loading vehicle, a liquid storage tank and a CO2A filling machine and a generator, wherein the vehicle-mounted movable liquid carbon dioxide filling system is used for providing a movable and field-inflated gas source and an initiation power supply for filling the liquid carbon dioxide phase change cracking device in the hole, and the high-pressure gas pipe is used for connecting the ball valve switch and the CO2The device comprises a filling machine, a ball valve switch, a quick plug-in connector, a stainless steel gas pipe, a liquid carbon dioxide phase change cracking device and a liquid carbon dioxide phase change cracking device, wherein the ball valve switch is used for controlling the on-off of a gas circuit; CO in vehicle-mounted movable liquid carbon dioxide filling system2The liquid filling machine is connected with one end of the ball valve switch through a high-pressure air pipe, the other end of the ball valve switch is connected with the quick plug connector, and the quick plug connector is connected with the in-hole filling liquid carbon dioxide phase change cracking device through a stainless steel air pipe.
2. A system for phase change fracturing rock with liquid carbon dioxide filled into a hole according to claim 1, wherein: the phase change cracking device filled with the liquid carbon dioxide in the hole comprises a cracking tube (1), a heating tube (2), an end cover (3), a heating tube locking nut (4), an air duct (5), a connecting joint (6), a one-way valve (7), an electric lead (8), an electric ignition head (9), a carbon dioxide heating tube medicament (10) and liquid carbon dioxide (11); the cracking tube (1) is a hollow cylinder with one open end; the heating tube (2) is also a hollow cylinder with one open end, and the diameter of the cylinder is smaller than that of the cracking tube (1); the heating tube (2) and the fracturing tube (1) are coaxially arranged, and one ends of openings of the heating tube and the fracturing tube are flush; the end cover (3) is used for sealing the cracking tube (1); the heating tube locking nut (4) is used for fixing the heating tube (2), and a small hole is formed in the center of the heating tube locking nut and used for leading out an electric lead (8); the gas guide pipe (5), the connecting joint (6) and the one-way valve (7) jointly form a liquid carbon dioxide inflation inlet for filling liquid carbon dioxide (11) into the cracking pipe (1), wherein the gas guide pipe (5) is used for connecting a stainless steel gas pipe, the connecting joint (6) is used for fixing the gas guide pipe (5) on the end cover (3), the one-way valve (7) is used for forming a one-way flow channel of the liquid carbon dioxide, and when the liquid carbon dioxide filled in the cracking pipe (1) reaches a certain pressure, the one-way valve (7) is automatically closed; the heating tube (2) is filled with carbon dioxide heating tube agent (10), and the agent generates heat under the action of the electric lead (8) and the electric ignition head (9) to detonate liquid carbon dioxide in the cracking tube (1).
3. A system for phase change fracturing rock with liquid carbon dioxide filled into a hole according to claim 2, wherein: the one-way valve (7) comprises a ferrule type pipe joint body (71) and a conical valve core (72), when liquid carbon dioxide filled in the cracking pipe (1) reaches a certain pressure, the conical valve core (72) is jacked into a conical cavity of the ferrule type pipe joint body (71) under the action of the pressure, and the one-way valve (7) is automatically closed.
4. A system for phase change fracturing rock with liquid carbon dioxide filled into a hole according to claim 2, wherein: the check valve (7) further comprises a sealing ring (73), and the sealing ring (73) is used for achieving a better sealing effect.
5. A system for phase change fracturing rock with liquid carbon dioxide filled into a hole according to claim 1, wherein: the liquid storage tank is a common 499L special gas storage tank for carbon dioxide fracturing in the market.
6. A system for phase change fracturing rock with liquid carbon dioxide filled into a hole according to claim 1, wherein: the generator is a 5KW three-phase generator.
7. A system for phase change fracturing rock with liquid carbon dioxide filled into a hole according to claim 1, wherein: the plug quick connector is divided into a female head and a male head, the female head is fixed on the stainless steel air pipe, and the male head is connected with the ball valve switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121032155.5U CN215169979U (en) | 2021-05-12 | 2021-05-12 | Phase-change fracturing rock breaking system filled with liquid carbon dioxide in hole |
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| CN202121032155.5U CN215169979U (en) | 2021-05-12 | 2021-05-12 | Phase-change fracturing rock breaking system filled with liquid carbon dioxide in hole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877753A (en) * | 2022-05-09 | 2022-08-09 | 广西新港湾工程有限公司 | Underwater carbon dioxide rock breaking pipe and using method |
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2021
- 2021-05-12 CN CN202121032155.5U patent/CN215169979U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877753A (en) * | 2022-05-09 | 2022-08-09 | 广西新港湾工程有限公司 | Underwater carbon dioxide rock breaking pipe and using method |
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