CN109519131B - Self-anchoring, self-sealing hole and waste water recovery sleeve for cavitation jet flow - Google Patents

Abstract

The invention discloses a self-anchoring and self-sealing hole for cavitation jet flow and a wastewater recovery sleeve, which comprise an outer sleeve assembly, an inner sleeve assembly and a gland, wherein the inner sleeve assembly is screwed inside the outer sleeve assembly, the rear end part of the inner sleeve assembly extends out of the outer sleeve assembly, the gland is fixed at the rear end part of the outer sleeve assembly and is pressed with the inner sleeve assembly, a water return groove is arranged on the joint surface of the inner sleeve assembly and the gland, a water return port communicated with the water return groove is arranged on the gland, and the water return port is connected with a wastewater recovery system. The invention can be arranged on a cavitation jet drill rod for use and can also be used independently, can realize the functions of self-anchoring, self-sealing and waste water recovery, effectively prevents secondary disasters caused by gas outburst, has convenient operation of waste water recovery, self-anchoring and self-sealing, novel structure and ingenious conception, and has good application prospect.

Description

A self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets

Technical field

The invention relates to the technical field of coal seam mining equipment, and in particular to a self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets.

Background technique

At present, coal is still my country's main energy source, and ensuring safe production in coal mines is an important guarantee for the sustainable development of the national economy. As most mines in China have entered the period of deep mining, the increase in the depth of coal seams has increased the in-situ stress in the coal seams, the gas content and gas pressure have also been increasing, and the permeability of the coal seams and surrounding rocks has been reduced, thus increasing the Hidden dangers of coal and gas outbursts in coal seams. According to statistics, more than 95% of the coal seams mined in high-gas and outburst mines across the country are low-permeability coal seams, resulting in a small impact range of gas drainage, fast attenuation speed, and difficult drainage. Moreover, most mine areas do not have protective layers. Due to the mining conditions, conventional gas drainage technology cannot effectively solve the problem of increasing the permeability of coal reservoirs, which directly results in low mine gas drainage rates, an imbalance in the ratio of "drilling, pumping, mining, and excavation", posing safety risks.

Therefore, it is necessary to take certain pressure relief and permeability measures to increase the permeability of coal seams and improve the gas drainage effect, which can effectively reduce the occurrence of outburst accidents in mining working faces. In response to the above problems, in order to better use drill pipe casing to achieve self-anchoring, self-sealing holes, waste water recovery and protection from secondary disasters caused by gas outbursts, and the casing is used alone or with cavitation jet drill pipe, installation and Convenient recycling is a current problem that needs to be solved.

Contents of the invention

The purpose of the present invention is to overcome the problem that existing casings for drill pipes cannot implement measures to relieve pressure and increase permeability, so as to reduce the occurrence of protrusion accidents in mining working faces. The self-anchoring, self-sealing hole and wastewater recovery casing of the present invention for cavitation jets can be installed on the drill pipe of the cavitation jet or used alone, and can realize the functions of self-anchoring, self-sealing holes and wastewater recovery, and is effective It prevents secondary disasters caused by gas outbursts. Wastewater recycling, self-anchoring, and self-sealing holes are all easy to operate. It has a novel structure and ingenious conception, and has good application prospects.

In order to achieve the above objects, the technical solutions adopted by the present invention are:

A self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets, including an outer casing assembly, an inner casing assembly and a gland,

The inner casing assembly is screwed to the inside of the outer casing assembly, the rear end of the inner casing assembly extends out of the outer casing assembly, the gland is fixed on the rear end of the outer casing assembly, and is pressed inside the rear end of the casing assembly,

A water return tank is provided on the joint surface of the inner casing assembly and the gland, and a water return port connected to the water return water tank is provided on the gland. The water return port is connected to the wastewater recovery system.

In the aforementioned self-anchoring and self-sealing holes and wastewater recovery casings for cavitation jets, the circumference of the gland is provided with threaded connection holes distributed at equal intervals, and fixing bolts are penetrated in the threaded connection holes to connect the gland and the The rear end of the outer sleeve assembly is fixedly connected.

The aforementioned self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets, the outer casing assembly includes an outer casing body, a pawl, a sealing rubber sleeve and a movable casing,

The pawls are in multiple groups and are hinged at equal intervals on the circumference of the front part of the outer casing body. The inner casing assembly is rotated and screwed into the outer casing body for tightening the ratchet surface of the pawls. When, the ratchet fixing surface of the pawl extends out of the outer wall of the outer sleeve body to realize self-anchoring of the outer sleeve assembly;

The sealing rubber sleeve and the movable sleeve are sleeved on the middle part of the outer sleeve body in sequence from front to back, and the inner sleeve component is rotated and screwed into the outer sleeve body to push the movable sleeve to squeeze and seal the hole. The rubber sleeve realizes the self-sealing hole in the outer wall of the outer sleeve assembly.

The rear end of the outer sleeve body is a flange fixed end surface for fixing with the gland.

The aforementioned self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets. The inner casing assembly includes an inner casing body and a pin locking mechanism. The rear end of the inner casing body is provided with a flange. Fixed end, the flange fixed end is fixedly connected to the gland. The circumference of the flange fixed end is provided with several sets of handles for easy rotation. The handles are used to rotate and screw the inner casing body into the outer casing body. ,

The water return channel is located on the fixed end of the flange and is connected with the inner casing body.

The pin locking mechanism is composed of several groups, which are distributed at equal intervals on the outer wall of the inner casing body. Pins are provided in the pin locking mechanism.

The inner casing body is rotated and screwed into the outer casing body. After the pin reaches the movable casing, the end of the pin pops out of the outer wall of the inner casing body and is embedded in the movable casing for pushing the movable casing. Casing extrusion sealing rubber sleeve.

In the aforementioned self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets, an annular groove is provided on the joint surface of the gland and the inner casing assembly, and the annular groove is located inside the water return port, and A rubber sealing ring is provided in the annular groove.

In the aforementioned self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets, the pawls are composed of two groups, which are symmetrically hinged on the circumference of the front part of the outer casing body.

In the aforementioned self-anchoring, self-sealing holes and wastewater recovery casings for cavitation jets, the handles are in three groups, equally spaced around the circumference of the fixed end of the flange; the pin locking mechanisms are in two groups, symmetrically distributed on on the outer wall of the inner casing body.

In the aforementioned self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets, the outer wall of the inner casing body is provided with internal threads, and the inner wall of the outer casing body is provided with external threads that match the internal threads.

The beneficial effects of the present invention are: the self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets of the present invention can be installed on the drill pipe of the cavitation jet or used alone, and can realize self-anchoring and self-sealing holes. , The function of wastewater recovery can effectively prevent secondary disasters caused by gas outbursts. Wastewater recovery, self-anchoring, and self-sealing holes are all easy to operate, have novel structures, and are ingeniously conceived, and have good application prospects.

Description of drawings

Figure 1 is a schematic structural diagram of the self-anchoring, self-sealing hole and wastewater recovery casing used for cavitation jets of the present invention;

Figure 2 is a rear view of the self-anchoring, self-sealing hole and wastewater recovery sleeve for cavitation jets of the present invention.

The meanings of the marks in the attached drawings are as follows:

1: Outer casing assembly; 101: Outer casing body; 102: Pawl; 103: Sealing rubber sleeve; 104: Movable casing; 105: Flange fixed end face; 2: Inner casing assembly; 201: Return water tank; 202: Inner casing body; 203: Pin locking mechanism; 204: Flange fixed end; 205: Handle; 206: Pin; 3: Gland; 301: Water return port; 302: Threaded connection hole; 303: Annular groove ;304: Rubber sealing ring.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the self-anchoring, self-sealing hole and wastewater recovery casing for cavitation jets of the present invention includes an outer casing assembly 1, an inner casing assembly 2 and a gland 3.

The inner casing assembly 2 is screwed inside the outer casing assembly 1. The rear end of the inner casing assembly 2 extends out of the outer casing assembly 1. The gland 3 is fixed to the rear end of the inner casing assembly 1. part, and press fit the rear end of the inner casing assembly 2,

A water return tank 201 is provided on the joint surface of the inner casing assembly 2 and the gland 3. A water return port 301 is provided on the gland 3 and communicates with the water return water tank 201. The water return port 301 is connected to the wastewater recovery system. .

The gland 3 is provided with threaded connection holes 302 distributed at equal intervals around its circumference. Fixing bolts penetrate through the threaded connection holes 302 to fixedly connect the gland 3 to the rear end of the outer sleeve assembly 1 .

The outer sleeve assembly 1 includes an outer sleeve body 101, a pawl 102, a sealing rubber sleeve 103 and a movable sleeve 104.

The pawls 102 are in multiple groups and are hinged at equal intervals on the circumference of the front part of the outer sleeve body 101. The inner casing assembly 2 is rotated and screwed into the outer sleeve body 101 for tightening the pawls 102. At this time, the ratchet surface of the pawl 102 extends out of the outer wall of the outer casing body 101 to realize the self-anchoring of the outer casing assembly 1, and the inner casing assembly 2 continues to be screwed to realize the inner casing assembly 2 and the outer casing body. 101Sealing of the place;

The sealing rubber sleeve 103 and the movable sleeve 104 are sleeved on the middle part of the outer sleeve body 101 in sequence from front to back, and the inner sleeve assembly 2 is rotated and screwed into the outer sleeve body 101 to push the movable sleeve. The tube 104 squeezes the sealing rubber sleeve 103 to realize self-sealing of the outer wall of the outer sleeve assembly 1;

The rear end of the outer sleeve body 101 is a flange fixed end surface 105 for fixing with the gland 3 .

The inner casing assembly 2 includes an inner casing body 202 and a pin locking mechanism 203. The rear end of the inner casing body 202 is provided with a flange fixed end 204. The flange fixed end 204 is connected to the gland 3 Fixed connection, the circumference of the flange fixed end 204 is provided with several sets of handles 205 for easy rotation, the handles 205 are used to rotate and screw the inner casing body 202 into the outer casing body 101,

The return water tank 201 is opened on the flange fixed end 204 and is connected with the inner casing body 202.

The pin locking mechanism 203 is composed of several groups, which are distributed at equal intervals on the outer wall of the inner casing body 202. The pin locking mechanism 203 is provided with pins 206.

The inner casing body 202 is rotated and screwed into the outer casing body 101. After the pin 206 reaches the movable casing 104, the end of the pin 206 pops out of the outer wall of the inner casing body 202 to push the movable sleeve. The tube 104 squeezes the sealing rubber sleeve 103 to realize the self-sealing of the outer sleeve assembly 1 .

Preferably, an annular groove 303 is provided on the joint surface of the gland 3 and the inner casing assembly 2. The annular groove 303 is located inside the water return port 301, and a rubber seal is provided in the annular groove 303. The ring 304 is used to improve the sealing performance of the joint surface of the gland 3 and the inner casing assembly 2 to prevent leakage. The wastewater will only flow into the wastewater recovery system from the water return tank 201 and the water return port 301 in order to realize the function of wastewater recovery.

The two sets of pawls 102 are symmetrically hinged on the circumference of the front part of the outer sleeve body 101. The two sets of pawls 102 can sufficiently realize the self-anchoring of the outer sleeve body 101. Multiple sets of pawls can also be added as needed. .

The handles 205 are in three groups, equally spaced around the flange fixed end 204, which facilitates rotation and operation. Multiple groups of handles can also be added as needed; the pin locking mechanism 203 is in two groups, symmetrically distributed on On the outer wall of the inner casing body 202, multiple sets of pin locking mechanisms can also be added as needed. The pins 206 are embedded in the outer wall of the inner casing body 202 through springs. The pins 206 can pop out of the inner casing body under the control of the springs. 202, at first manually press down the pin 206 to embed it in the outer wall of the inner casing body 202. When the pin 206 reaches the position of the movable casing 104, the end of the pin 206 pops out under the control of the spring. The outer wall of the casing body 202 is embedded in the movable casing 104 and is used to push the movable casing 104 to squeeze the hole-sealing rubber sleeve 103 to achieve the function of self-sealing the hole.

In the self-anchoring, self-sealing hole and wastewater recovery casing of the present invention for cavitation jets, the outer wall of the inner casing body 202 is provided with internal threads, and the inner wall of the outer casing body 101 is provided with external threads that match the internal threads. It is convenient for the inner casing body 202 to be smoothly screwed into the outer casing body 101 under the rotation of the handle 205, so as to realize the functions of self-anchoring and self-sealing.

The self-anchoring, self-sealing hole and wastewater recovery casing used for cavitation jets of the present invention can be installed on the drill pipe of cavitation jets or used alone. A large amount of high-pressure wastewater will be generated when the cavitation jet drill pipes are drilled. At the same time, during the cavitation jet coal seam process, there may also be a risk of concentrated release of gas. In the casing structure of the present invention, the cavitation drill pipe is inserted through the center hole of the gland 3, and is axially sealed with the rubber sealing ring in the gland 3. , during the screwing process of the inner casing assembly 2, the pin 206 drives the movable casing 104 to squeeze the sealing rubber sleeve 103 to achieve hole sealing. After further screwing, the inner casing assembly will tighten the pawl 102 of the outer casing assembly 1. The pawl 102 anchors the casing on the borehole wall to achieve the purpose of self-anchoring, self-sealing the hole and preventing gas outburst. At the same time, the high-pressure wastewater generated during the drilling and cavitation process will flow along the outer wall of the drill pipe and between the boreholes. The gap backflow is connected to the wastewater recovery system through the return water tank 201 of the inner casing assembly 2 and the return port 301 of the gland 3 for real-time wastewater recovery.

To sum up, the self-anchoring, self-sealing holes and wastewater recovery casing for cavitation jets of the present invention can be installed on the drill pipe of cavitation jets or used alone, and can realize self-anchoring, self-sealing holes and wastewater recovery. The recycling function can effectively prevent secondary disasters caused by gas outbursts. Wastewater recycling, self-anchoring, and self-sealing holes are all easy to operate. The structure is novel and cleverly conceived, and it has good application prospects.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have other aspects. Various changes and modifications are possible, which fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims (3)

1. A self-anchoring, self-sealing hole and waste water recovery sleeve pipe for cavitation efflux, its characterized in that: comprises an outer sleeve component (1), an inner sleeve component (2) and a gland (3),

the inner sleeve component (2) is screwed inside the outer sleeve component (1), the rear end part of the inner sleeve component (2) extends out of the outer sleeve component (1), the gland (3) is fixed at the rear end part of the outer sleeve component (1) and is pressed at the rear end part of the inner sleeve component (2),

the utility model discloses a waste water recovery device, which is characterized in that a water return groove (201) is arranged on the joint surface of an inner sleeve component (2) and a gland (3), a water return opening (301) communicated with the water return groove (201) is arranged on the gland (3), the water return opening (301) is connected with a waste water recovery system, threaded connecting holes (302) which are distributed at equal intervals are arranged on the circumference of the gland (3), fixing bolts penetrate through the threaded connecting holes (302), the gland (3) is fixedly connected with the rear end part of an outer sleeve component (1), the outer sleeve component (1) comprises an outer sleeve body (101), a pawl (102), a hole sealing rubber sleeve (103) and a movable sleeve (104),

the pawl (102) is a plurality of groups and is hinged on the circumference of the front part of the outer sleeve body (101) at equal intervals, the inner sleeve assembly (2) is rotationally screwed into the ratchet fixing surface of the pawl (102) in the outer sleeve body (101) for tensioning, and at the moment, the ratchet fixing surface of the pawl (102) extends out of the outer wall of the outer sleeve body (101) to realize self-anchoring of the outer sleeve assembly (1);

the hole sealing rubber sleeve (103) and the movable sleeve (104) are sequentially sleeved on the middle part of the outer sleeve body (101) from front to back, the inner sleeve assembly (2) is rotationally screwed into the outer sleeve body (101) and used for pushing the movable sleeve (104) to extrude the hole sealing rubber sleeve (103) so as to realize the self hole sealing of the outer wall of the outer sleeve assembly (1),

the rear end part of the outer sleeve body (101) is provided with a flange fixing end face (105) used for being fixed with a gland (3), the inner sleeve assembly (2) comprises an inner sleeve body (202) and a pin locking mechanism (203), the rear end part of the inner sleeve body (202) is provided with a flange fixing end (204), the flange fixing end (204) is fixedly connected with the gland (3), the periphery of the flange fixing end (204) is provided with a plurality of groups of handles (205) which are convenient to rotate, the handles (205) are used for rotationally screwing the inner sleeve body (202) into the outer sleeve body (101),

the backwater groove (201) is arranged on the flange fixed end (204) and is communicated with the inner sleeve body (202),

the pin locking mechanism (203) is a plurality of groups and is distributed on the outer wall of the inner sleeve body (202) at equal intervals, pins (206) are arranged in the pin locking mechanism (203),

the novel sealing device is characterized in that the inner sleeve body (202) is rotationally screwed into the outer sleeve body (101), after the pin (206) reaches the movable sleeve (104), the end part of the pin (206) is ejected out of the outer wall of the inner sleeve body (202) and embedded into the movable sleeve (104) and used for pushing the movable sleeve (104) to extrude the hole sealing rubber sleeve (103), an annular groove (303) is formed in the joint surface of the gland (3) and the inner sleeve assembly (2), the annular groove (303) is located the inner side of the water return port (301), a rubber sealing ring (304) is arranged in the annular groove (303), and the pawls (102) are two groups and are symmetrically hinged to the periphery of the front part of the outer sleeve body (101).

2. The self-anchoring, self-sealing hole and wastewater recovery sleeve for cavitation jet according to claim 1, wherein: the handles (205) are three groups and are distributed at equal intervals on the circumference of the flange fixing end (204); the pin locking mechanisms (203) are two groups and are symmetrically distributed on the outer wall of the inner sleeve body (202).

3. The self-anchoring, self-sealing hole and wastewater recovery sleeve for cavitation jet according to claim 1, wherein: the outer wall of the inner sleeve body (202) is provided with an internal thread, and the inner wall of the outer sleeve body (101) is provided with an external thread matched with the internal thread.