阅读说明：本技术 气体膨胀***柔性化致裂管***装置及其使用方法 (Flexible fracturing pipe blasting device for gas expansion blasting and using method thereof ) 是由 朱宽 刘保阳 徐添福 黄雄 周桂松 武森 周军 于 2020-08-14 设计创作，主要内容包括：本发明公开一种气体膨胀爆破柔性化致裂管爆破装置及其使用方法,该气体膨胀爆破柔性化致裂管爆破装置包括柔性化致裂管,所述柔性化致裂管包括柔性管体,所述柔性化致裂管还包括用于向所述柔性管体内填充爆破介质的充气头,所述充气头设于所述柔性管体的一端,且所述充气头接通所述柔性管体的内外空间。本发明提到的柔性化致裂管利用充气头在炮孔内向柔性管体内填充爆破介质,提高了致裂管的使用安全性；此外,致裂管柔性化好,在运输过程中可进行折叠、弯曲,便于运输；柔性化致裂管质量轻便,便于现场操作,提高了工作效率。(The invention discloses a flexible fracturing pipe blasting device for gas expansion blasting and a using method thereof. The flexible fracturing pipe provided by the invention utilizes the inflation head to fill blasting media in the blast hole into the flexible pipe body, so that the use safety of the fracturing pipe is improved; in addition, the fracturing pipe has good flexibility, can be folded and bent in the transportation process, and is convenient to transport; the flexible fracturing pipe is light in weight, convenient to operate on site and capable of improving working efficiency.)

1. The flexible fracturing pipe blasting device for gas expansion blasting is characterized by comprising a flexible fracturing pipe (1);

the flexible fracturing pipe (1) comprises a flexible pipe body (101);

the flexible fracturing pipe (1) further comprises an inflating head (102) used for filling blasting media into the flexible pipe body (101), wherein the inflating head (102) is arranged at one end of the flexible pipe body (101), and the inflating head (102) is communicated with the inner space and the outer space of the flexible pipe body (101).

2. The gas expansion blasting flexible fracturing pipe blasting device according to claim 1, wherein one end of the flexible pipe body (101) is connected with an inflating head (2), the inflating head (102) is arranged on the inflating head (2), and one end of the flexible pipe body (101) far away from the inflating head (2) is connected with a sealing head (3).

3. A gas expansion blasting flexible fracturing pipe bursting apparatus as claimed in claim 2 in which at least one of the charging head (2) and the sealing head (3) is fixedly connected to the flexible pipe body (101) by a clamp (4).

4. The gas expansion blasting flexible fracturing pipe blasting device according to claim 2, wherein an inflation through hole (201) communicating the inner space and the outer space of the flexible pipe body (101) is formed in the filling head (2), an inflation valve (5) communicating the inner space and the outer space of the flexible pipe body (101) is arranged in the inflation through hole (201), and an air inlet of the inflation valve (5) is connected with the filling head (102).

5. The gas expansion blasting flexible fracturing pipe blasting device according to claim 2, wherein the filling head (2) is connected with an excitation pipe (6), and one end of the excitation pipe (6) far away from the filling head (2) is arranged in the inner cavity of the flexible pipe body (101).

6. The gas expansion blasting flexible fracturing pipe blasting device according to claim 5, wherein the filling head (2) is formed with a conical threaded through hole (202), the conical threaded through hole (202) comprises a small diameter end (2021) and a large diameter end (2022), the small diameter end (2021) is provided with the exciting pipe (6), one end of the exciting pipe (6) far away from the filling head (2) is arranged in the inner cavity of the flexible fracturing pipe (1), and the large diameter end (2022) is connected with a conical sealing plug (7) in a threaded fit manner.

7. The gas expansion blasting flexible fracturing pipe blasting device according to claim 6, wherein the minimum diameter of the tapered threaded through hole (202) is larger than the diameter of the pipe body (601) of the excitation pipe (6), and the minimum diameter of the tapered threaded through hole (202) is smaller than the diameter of the pipe head (602) of the excitation pipe (6).

8. The gas expansion blasting flexible fracturing pipe blasting device according to claim 2, wherein the sealing head (3) is formed with a vent threaded through hole (301) communicating the inner space and the outer space of the flexible pipe body (101), a safety valve (8) communicating the inner space and the outer space of the flexible pipe body (101) is arranged in the vent threaded through hole (301), and a hollow screw (9) is connected to one end of the vent threaded through hole (301) far away from the flexible pipe body (101) through thread fit.

9. The gas expansion blasting flexible fracturing pipe blasting device of any one of claims 1-8, wherein the flexible pipe body (101) is a polymer pipe.

10. The use method of the flexible fracturing pipe blasting device for gas expansion blasting is characterized by being applied to the flexible fracturing pipe blasting device for gas expansion blasting according to any one of claims 1 to 9, wherein one end of the flexible pipe body (101) is connected with a filling head (2), the filling head (2) is provided with an inflation valve (5) communicated with the inner space and the outer space of the flexible pipe body (101), the air inlet of the inflation valve (5) is connected with the inflation head (102), the filling head (2) is connected with an excitation pipe (6), and one end, far away from the filling head (2), of the flexible pipe body (101) is connected with a sealing head (3);

the use method of the flexible fracturing pipe blasting device for gas expansion blasting comprises the following steps:

-connecting the filling head (2) to one end of the flexible pipe body (101);

-connecting the sealing head (3) to an end of the flexible pipe body (101) remote from the filling head (2);

-loading the excitation tube (6) from the filling head (2) into the flexible pipe body (101);

connecting the inflation head (102) with an external air supply source through an inflation tube;

filling a preset amount of blasting media into the flexible pipe body (101) by using the inflation head (102) and the inflation valve (5);

placing the flexible pipe body (101) in a blast hole and plugging a gap between the flexible pipe body (101) and the blast hole;

continuously filling the flexible pipe body (101) with residual blasting media;

and connecting the excitation tube (6) and controlling the excitation of the excitation tube to finish blasting.

Technical Field

The invention relates to the field of fracturing pipes, in particular to a flexible fracturing pipe blasting device for gas expansion blasting and a using method of the flexible fracturing pipe blasting device for the gas expansion blasting.

Background

The carbon dioxide expansion blasting technology is a rock breaking method mainly based on physical explosion, an expansion blasting device of the carbon dioxide expansion blasting technology mainly comprises an internal exciting pipe, an external fracturing pipe and supercritical carbon dioxide (higher than 7.38MPa) filled in the internal exciting pipe and the external fracturing pipe, and the technical principle is as follows: the exciting tube is installed in the main tube body, when the exciting current is conducted, the electric ignition head ignites, the heating powder is ignited and rapidly burns to release a large amount of heat, the temperature and the pressure in the cracking tube body are rapidly raised, and the dense-phase liquid CO is enabled to be in a liquid state₂Quickly converting into gaseous supercritical state, and when the pressure in main pipe body breaks through the blocking action of energy-releasing end head rupture disk, supercritical state CO₂The liquid-gas phase change is generated instantly, and high-pressure gas is formed and discharged from the energy discharge end to do work to the outside, thereby achieving the purpose of breaking rock mass.

The carbon dioxide cracking tube commonly used in the market at present is an outer-hole inflation cracking tube, and when the carbon dioxide cracking tube is used on site, the carbon dioxide cracking tube is firstly inflated outside a hole, then is connected and installed, and is placed in the hole for detonation. If the pipe body is cracked due to leakage of the cracking pipe in the connecting installation or placing process, safety accidents are easily caused, and the safety of field workers cannot be guaranteed; and the tube is perforated after the inflation is finished, so that the tube is heavier when perforated, and the operation is not convenient.

Disclosure of Invention

The invention mainly aims to provide a flexible fracturing pipe blasting device for gas expansion blasting, and aims to solve the problem that safety accidents are easily caused by adopting extra-hole inflation.

In order to achieve the purpose, the invention provides a flexible fracturing pipe blasting device for gas expansion blasting, which comprises a flexible fracturing pipe;

the flexible fracturing pipe comprises a flexible pipe body;

the flexible fracturing pipe further comprises an inflation head used for filling blasting media into the flexible pipe body, the inflation head is arranged at one end of the flexible pipe body, one end, far away from the flexible pipe body, of the inflation head is used for being connected with an inflation pipe, and the inflation head is communicated with the inner space and the outer space of the flexible pipe body.

Preferably, one end of the flexible pipe body is connected with a filling head, the filling head is provided with the inflation head, and one end of the flexible pipe body, which is far away from the filling head, is connected with a sealing head.

Preferably, at least one of the filling head and the sealing head is fixedly connected to the flexible pipe body by a clamp.

Preferably, an inflation through hole communicated with the inner space and the outer space of the flexible pipe body is formed in the filling head, an inflation valve communicated with the inner space and the outer space of the flexible pipe body is arranged in the inflation through hole, and an air inlet of the inflation valve is connected with the inflation head.

Preferably, the filling head is connected with an excitation tube, and one end of the excitation tube, which is far away from the filling head, is arranged in the inner chamber of the flexible tube body.

Preferably, a tapered thread through hole is formed in the filling head and comprises a small-diameter end and a large-diameter end, the small-diameter end is provided with the excitation pipe, one end, far away from the filling head, of the excitation pipe is arranged in the inner cavity of the flexible fracturing pipe, and a tapered sealing plug is connected in the large-diameter end in a threaded fit mode.

Preferably, the minimum diameter of the tapered threaded through hole is larger than the diameter of the tube body of the excitation tube, and the minimum diameter of the tapered threaded through hole is smaller than the diameter of the tube head of the excitation tube.

Preferably, an exhaust threaded through hole communicated with the inner space and the outer space of the flexible pipe body is formed in the sealing head, a safety valve communicated with the inner space and the outer space of the flexible pipe body is arranged in the exhaust threaded through hole, and one end, far away from the flexible pipe body, of the exhaust threaded through hole is connected with a hollow screw in a threaded fit mode.

Preferably, the flexible pipe body is a polymer pipe.

In order to achieve the purpose, the invention also provides a using method of the flexible fracturing pipe blasting device for gas expansion blasting, wherein one end of the flexible pipe body is connected with a filling head, the filling head is provided with an inflation valve communicated with the inner space and the outer space of the flexible pipe body, the air inlet of the inflation valve is connected with the inflation head, the filling head is connected with an excitation pipe, and one end of the flexible pipe body, which is far away from the filling head, is connected with a sealing head;

the use method of the flexible fracturing pipe blasting device for gas expansion blasting comprises the following steps:

connecting the filling head to one end of the flexible pipe body;

connecting the sealing head to an end of the flexible pipe body remote from the filling head;

loading the excitation tube from the filling head into the flexible tube body;

connecting the inflation head with an external air supply source through an inflation tube;

filling a preset amount of blasting media into the flexible pipe body by using the inflation head and the inflation valve;

placing the flexible pipe body in a blast hole and filling a gap between the flexible pipe body and the blast hole;

continuously filling the residual blasting media into the flexible pipe body;

and connecting the excitation tubes and controlling the excitation of the excitation tubes to finish blasting.

According to the technical scheme, the flexible fracturing pipe is filled with blasting media in the blast hole through the inflation head, so that the use safety of the fracturing pipe is improved; in addition, the fracturing pipe has good flexibility, can be folded and bent in the transportation process, and is convenient to transport; the flexible fracturing pipe is light in weight, convenient to operate on site and capable of improving working efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structure of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Flexible fracturing pipe	301	Exhaust threaded through hole
101	Flexible pipe body	4	Clamp hoop
				102	Inflating head	5	Inflation valve
2	Filling head	6	Exciting tube
				201	Inflatable through hole	601	Pipe body
202	Tapered threaded through hole	602	Pipe head
				2021	Small diameter end	7	Conical sealing plug
2022	End of large diameter	8	Safety valve
				3	Sealing head	9	Hollow screw

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a flexible fracturing pipe blasting device for gas expansion blasting.

The flexible fracturing pipe comprises a flexible fracturing pipe 1, wherein the flexible fracturing pipe 1 comprises a flexible pipe body 101, the flexible fracturing pipe 1 further comprises an inflating head 102 used for filling blasting media into the flexible pipe body 101, the inflating head 102 is arranged at one end of the flexible pipe body 101, one end, far away from the flexible pipe body 101, of the inflating head 102 is used for being connected with an inflating pipe, and the inflating head 102 is communicated with the inner space and the outer space of the flexible pipe body 101.

The flexible fracturing pipe 1 utilizes the inflation head 2 to fill the flexible pipe body 101 with the blasting medium in the blast hole, so that the serious safety problem caused by the fact that the pressure inside the flexible pipe body 101 is increased due to external reasons when a mode of filling the blasting medium outside the blast hole is adopted is avoided, the use safety of the fracturing pipe is improved, and the flexible fracturing pipe is suitable for the field of geotechnical engineering blasting; in addition, the fracturing pipe has good flexibility, can be folded and bent in the transportation process, and is convenient to transport; the flexible fracturing pipe 1 is light in weight, convenient to operate on site and capable of improving the working efficiency.

Specifically, the one end of flexible pipe body 101 is connected with fills dress head 2, flexible pipe body 101 is kept away from fill dress head 2's one end is connected with sealed head 3, fill and be formed with the switch-on the head 2 the inflation through-hole 201 of the interior outer space of flexible pipe body 101, be equipped with the switch-on in the inflation through-hole 201 the inflation valve 5 of the interior outer space of flexible pipe body 101, the air inlet of inflation valve 5 is connected with fill head 102, it excites pipe 6 to be connected with on the head 2 to fill, it keeps away from to excite pipe 6 fill the one end of the head 2 and locate the inside cavity of flexible pipe body 101.

Preferably, at least one of the filling head 2 and the sealing head 3 is fixedly connected to the flexible pipe body 101 by means of a collar 4.

The filling head 2 or the sealing head 3 can be tightly connected to the flexible pipe body 101 by means of the collar 4.

Preferably, the flexible pipe body 101 is a polymer pipe.

The flexible pipe body 101 is made of a high polymer material, so that metal residues are few after the flexible cracking pipe 1 is exploded, and the adverse effect of waste metal residues on the environment is reduced; compared with the traditional gas cracking pipe with the same volume, the hole wall of the flexible pipe body 101 made of the high polymer material is thinner, so that more liquid carbon dioxide can be filled in the pipe body, and the blasting effect is enhanced; the flexible cracking tube 1 has low production cost, and the cost of the tube body with the same model and specification is about one fourth of that of the traditional gas cracking tube; the flexible cracking pipe 1 has high strength, can bear pressure over 20Mpa and is far higher than pressure of 8-12Mpa of liquid carbon dioxide, and prevents the liquid carbon dioxide from leaking due to the breakage of the pipe body.

Preferably, the inflation valve 5 is a one-way valve.

The inflation valve 5 adopts a one-way valve to prevent the filled gas from reversely leaking, and the inflation efficiency is improved.

Preferably, a tapered threaded through hole 202 is formed in the filling head 2, the tapered threaded through hole 202 comprises a small-diameter end 2021 and a large-diameter end 2022, the small-diameter end 2021 is provided with the excitation tube 6, one end of the excitation tube 6, which is far away from the filling head 2, is arranged in the internal cavity of the flexible fracturing tube 1, a tapered sealing plug 7 is connected in the large-diameter end 2022 in a threaded fit manner, the minimum diameter of the tapered threaded through hole 202 is greater than the diameter of the tube body 601 of the excitation tube 6, and the minimum diameter of the tapered threaded through hole 202 is smaller than the diameter of the tube head 602 of the excitation tube 6.

After the excitation tube 6 is placed in the flexible tube body 101, the conical sealing plug 7 is used for blocking the conical threaded through hole 202, fixing the excitation tube 6 and preventing the excitation tube 6 from being ejected out when the pressure in the tube body rises; the small diameter end 2021 of the tapered threaded through bore 202 is used to capture the tip 602 of the excitation tube 6.

In another embodiment, the sealing head 3 is formed with a vent screw through hole 301 communicating with the inner space and the outer space of the flexible pipe body 101, a safety valve 8 communicating with the inner space and the outer space of the flexible pipe body 101 is arranged in the vent screw through hole 301, and one end of the vent screw through hole 301 far away from the flexible pipe body 101 is connected with a hollow screw 9 through screw thread fit.

Specifically, the inner diameter of the vent threaded through hole 301 is larger than the inner hole diameter of the hollow screw 9.

Preferably, the inner diameter of the exhaust threaded through hole 301 is 2 mm.

Preferably, the screw inner hole of the hollow screw 9 is 1 mm.

The safety pressure of the safety valve 8 is preset to be 15-30 Mpa, when partial liquid carbon dioxide in the flexible pipe body 101 is subjected to phase change due to other external reasons, the pressure in the pipe rises, when the pressure is larger than the preset safety value of the safety valve 8, the safety valve 8 is conducted, the gas in the pipe is discharged from the inner hole of the hollow screw 9 to reduce the pressure in the pipe, and the safety of the flexible cracking pipe during the use of the pipe inflated in the hole is ensured; after the pressure in the pipe is reduced to be lower than the preset safety value of the safety valve 8, the channel of the safety valve 8 is closed, and sealing is realized again.

The invention also provides a flexible fracturing pipe blasting device for gas expansion blasting, wherein one end of the flexible pipe body 101 is connected with a filling head 2, the filling head 2 is provided with an inflation valve 5 communicated with the inner space and the outer space of the flexible pipe body 101, the air inlet of the inflation valve 5 is connected with the inflation head 102, the filling head 2 is connected with an excitation pipe 6, and one end of the flexible pipe body 101, which is far away from the filling head 2, is connected with a sealing head 3;

the use method of the flexible fracturing pipe blasting device for gas expansion blasting comprises the following steps:

step S1: connecting the filling head 2 to one end of the flexible pipe body 101;

step S2: connecting the sealing head 3 to an end of the flexible pipe body 101 remote from the filling head 2;

step S3: loading said excitation tube 6 from said filling head 2 into said flexible pipe body 101;

step S4: connecting the inflation head 102 with an external air supply source through an inflation tube;

step S5: filling a preset amount of blasting media into the flexible pipe body 101 by using the inflation head 102 and the inflation valve 5;

step S6: placing the flexible pipe body 101 in a blast hole and filling a gap between the flexible pipe body 101 and the blast hole;

step S7: continuously filling the flexible pipe body 101 with the residual blasting media;

step S8: and connecting the excitation tube 6 and controlling the excitation of the excitation tube to complete the blasting.

In the technical scheme of the invention, after the flexible pipe body 101 is packaged, the inflation head 102 is connected with an external air supply source through an inflation pipe, a preset amount of liquid carbon dioxide is filled into the flexible pipe body 101, so that the pressure in the flexible pipe body 101 is increased, the hardness of the flexible pipe body 101 is increased, the subsequent hole discharging operation is facilitated, after the flexible pipe body 101 is subjected to hole discharging and filling, the residual liquid carbon dioxide is continuously filled, in addition, due to the action of surrounding pressure of the hole wall, a structure similar to 'coupled charge' can be formed after the filling is finished, the subsequent blasting effect is improved, the connection line of the excitation pipe 6 is connected and controlled to be excited, the liquid carbon dioxide in the flexible pipe body 101 is subjected to phase change, the pressure in the pipe is rapidly increased, the flexible pipe body 101 is burst, and gas overflows to apply work.

In another embodiment, a plurality of flexible fracturing tubes 1 form a connecting tube through other related devices, a preset amount of liquid carbon dioxide can be injected into the flexible tube 101, after the flexible tube 101 has enough hardness, the assembled connecting tube is placed in a blast hole according to specific requirements, a gap between the connecting tube and the blast hole is filled, the flexible tube 101 is continuously filled with the liquid carbon dioxide through an inflation tube, the excitation tubes 8 in the flexible fracturing tubes 1 are connected in series through a lead, and are connected with a power supply and an external controller through the lead, and the excitation tubes 8 are triggered by the external controller to complete the blasting operation.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.