CN202850968U - Sand-adding device for coal mine underground fracturing or slotting - Google Patents
Sand-adding device for coal mine underground fracturing or slotting Download PDFInfo
- Publication number
- CN202850968U CN202850968U CN 201220568044 CN201220568044U CN202850968U CN 202850968 U CN202850968 U CN 202850968U CN 201220568044 CN201220568044 CN 201220568044 CN 201220568044 U CN201220568044 U CN 201220568044U CN 202850968 U CN202850968 U CN 202850968U
- Authority
- CN
- China
- Prior art keywords
- pipe
- valve
- water inlet
- sand
- jet nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a sand-adding device for coal mine underground fracturing or slotting. The device comprises a water inlet pipe, a mixing pipe and a water outlet pipe which are connected in sequence. A first electric valve, a first digital pressure gauge, a first electromagnetic flowmeter are arranged on a pipeline of the water inlet pipe. An outlet end of the water outlet pipe is used for being connected with a medium receiving port of a medium booster pump group. A check valve, a second digital pressure gauge and a second electromagnetic flowmeter are arranged on a pipeline of the water outlet pipe. A hopper used for containing sand materials is communicated with the upper portion of the mixing pipe through a sand feeding pipe. An electric discharge valve and an electric gate valve are arranged on a pipeline of the sand feeding pipe. The first electric valve, the electric discharge valve and the electric gate valve are all in an explosion proof type. The water inlet pipe, the mixing pipe and the water outlet pipe are respectively fixed on a flat plate mine car. The sand-adding device for coal mine underground fracturing or slotting has the advantages of being simple in structure, small in size and convenient to convey and transfer when the device is moved in or out of a well, sand-adding labor intensity is lowered, amount of used labor is lowered, potential safety hazards are reduced, and coal layer slotting efficiency is improved or permeability-increasing effect of coal and rock mass after fracturing is guaranteed.
Description
Technical field
The utility model relates to coal mine underground coal bed gas pumping technical field, especially for the sanding device in fracturing under the coal mine or the slotting process.
Background technology
Coal-bed gas is a kind of clear energy sources, but for coal production a kind of disaster source especially.The coal of China is composed and is deposited complex geologic conditions, mainly relies on underground mining, and along with the increase of mining depth, coal seam gas-bearing capacity increases gradually, and coal-bed gas pressure increases, and outstanding danger increases, and the protrusion-dispelling difficulty is increasing.Utilize the appearance of encouragement policy along with day by day strong, the country of the increase of mining depth, resource requirement is a series of about coal mine gas hazard management compulsory measure and cbm development, all an urgent demand has a gas pumping technology cover system, complete, that ground combines with the down-hole.Particularly the coal seam, colliery is weak seam mostly under the Chongqing region, has the advantages that seam hardness is low, gas bearing capacity is high, gas permeability is poor; Outburst hazard is large, Gas Disaster is the first factor of restriction safety of coal mines, High-efficient Production, existing gas govenance has been difficult to satisfy the demand of High-efficient Production, in the urgent need to a kind of novel zone and the local technique of administering, takes over nervous situation with the present extinction difficulty of thorough change, digging.The important means that fracturing and hydraulic slotted liner technique technology are administered as coal mine gas is widely used in the local gas control and local gas govenance of most domestic coal and gas outburst mine, the important measures that transform hydraulic fracturing technology or position, coal-bed gas exploitation middle level.But owing to be subjected to the restriction of basic industries and safety management aspect, for pressure break and slot provide its system pressure of compression pump group of power to have certain limitation, can not unlimitedly improve, therefore, its pressure break slot ability is subject to certain limitation, and at present, there is no way can significantly improve.So those skilled in the art seeks the approach that improves from pressure break slot medium aspect.Find through practice, in the hydraulic slotted liner technique technology, adopted in the past pure clear water as the slot medium, but it often can't reach the slot effect of expection to the rock of the larger coal body of hardness factor and Seam Roof And Floor, its slot is limited in one's ability, and after in water, adding a small amount of sandstone, adopt lower slot pressure just can cut through the larger coal and rock of hardness factor; The coal and rock hydraulic fracturing technology has better effects to coal and rock anti-reflection, but after adopting riverfrac treatment to finish, the crack that pressure break produces is closed easily, reduced anti-reflection due effect after the pressure break, when in pressure break water, adding a small amount of sandstone, utilization enters the sandstone in crack as the supporting role of supporter to coal and rock, to stop the closing up of cracks of pressure break, guarantees post-fracturing antireflective effect.Yet, there is no in the prior art and complete add sand equipment or device can utilize, what more lack science adds the sand control method, can only rely on the artificial material lock opening degree of adjusting to control the sand amount that adds by adding easily the sand hopper, not only labour intensity is large for it, poor stability, sand water mixed proportion are undesirable, but also seriously restricts efficient and the antireflective effect of fracturing and slot.
Summary of the invention
The purpose of this utility model is exactly for the deficiencies in the prior art, a kind of sanding device for coal mine underground fracturing or slot is provided, to replace the simple and easy sand hopper that adds, realize reducing labour intensity, reduce underground mine use worker amount, reduce potential safety hazard, improve fracturing and the efficient of slot and the target of antireflective effect.
For achieving the above object, the utility model adopts following technical scheme.
A kind of coal mine underground fracturing or slot sanding device, comprise the water inlet pipe, mixing tube, the outlet pipe that connect successively, the entrance point of water inlet pipe is used for being connected with the water source, and the pipeline of water inlet pipe is provided with the first motor operated valve, the first digital pressure gauge, the first electromagnetic flowmeter; The port of export of outlet pipe is used for being connected with pressure break or the slot medium access port of medium force (forcing) pump group, and the pipeline of outlet pipe is provided with flap valve, the second digital pressure gauge, the second electromagnetic flowmeter; Described mixing tube is by being communicated with the hopper for splendid attire sand material to sandpipe, hopper is positioned at the mixing tube top, is provided with electronic discharge valve and electric brake plate valve for the pipeline of sandpipe, and electronic discharge valve is positioned at electric brake plate valve top; Described the first motor operated valve, electronic discharge valve and electric brake plate valve all adopt explosion-proof type; Described water inlet pipe, mixing tube and outlet pipe are fixed on the dull and stereotyped mine car by fixed support respectively.
The utility model after the employing technique scheme, can utilize PLC ripe in the prior art or the industrial automation control system of PC, by the first digital pressure gauge, the first electromagnetic flowmeter, the second digital pressure gauge and the second electromagnetic flowmeter are intake and the pressure of water outlet and the digital signal acquiring of flow detection, and the detection signal of pressure and flow shown by automatic control system, to determine the difference of pressure and flow and setting value; Simultaneously, utilize the control function of automatic control system to realize the control with open degree of closing to the first motor operated valve, electronic discharge valve and electric brake plate valve, actual flow adjustment control according to water inlet adds the sand amount, thereby automatically realize the sand water mixed proportion in pressure break or the slot medium, to replace sand work, reduction labour intensity, minimizing underground mine use worker's amount and the minimizing potential safety hazard of manually adding of the prior art, guarantee that sand water mixed proportion satisfies the setting requirement, and simple in structure, manufacturing cost and use cost is low, the transportation of going into the well on convenient.The utility model is because the first motor operated valve, electronic discharge valve and electric brake plate valve all adopt explosion-proof type, to guarantee using safety under the coal mine; In addition, this device is fixed on the dull and stereotyped mine car by fixed support respectively by water inlet pipe, mixing tube and outlet pipe, can make things convenient for this device mobile, shifts using area, has also strengthened the interconnective fastness of water inlet pipe, mixing tube and outlet pipe.Wherein, the electric brake plate valve is used for guaranteeing the seal of electronic discharge valve, when needs in time stop for sand, can turn-off rapidly the electric brake plate valve.The utility model should have enough sand material before the work of medium force (forcing) pump group or in the work in the hopper.
Preferably, described mixing tube is comprised of the jet nozzle, blending bunker and the mixed flow tube that connect successively, the entrance point of jet nozzle is connected with the port of export of described water inlet pipe, jet nozzle is the reducing pipe structure, the minor diameter pipeline section of jet nozzle consists of its jet segment, and the port of export of jet nozzle stretches in the blending bunker; Blending bunker is made of straight length and Taper Pipe section, and the bore of Taper Pipe section shrinks gradually along the media flow direction; Mixed flow tube comprises flared section, and the bore of flared section is expanded gradually along the media flow direction, and the small end bore of flared section is identical with the Taper Pipe section small end bore of blending bunker, and the small end of flared section is communicated with by a straight length with the Taper Pipe section small end of blending bunker; The described port of export of sandpipe of giving is communicated with the straight length of blending bunker, is positioned at the rear of the port of export of jet nozzle to the outlet of sandpipe.Utilize the negative pressure of medium force (forcing) pump group import and the jet-action of jet nozzle that the sand material is blended in the clear water, blending bunker is used for storing enough sand material by straight length, and the Taper Pipe section is beneficial to the sand material and concentrates mixed; The flared section of mixed flow tube is convenient to Medium Diffusion, with the effect that realizes that sand water mixes.Certainly blending bunker integral body can be olive-shaped, or its straight length can be cydariform or a spherical part.
Further preferred, described jet nozzle comprises the spray orifice that its front end is provided with, and injection diameter is less than the narrow tube diameter of jet nozzle, and the spray orifice rear end is provided with tapering afflux section.Further improve the jeting effect of clear water, realize that sand water mixes smoothly.
Preferably, described the first motor operated valve, electronic discharge valve and electric brake plate valve outside are respectively equipped with anti-explosion cover, and anti-explosion cover is fixedly connected on the described dull and stereotyped mine car.
Preferably, the port of export of the entrance point of described water inlet pipe and described outlet pipe has the structure that the snap joint with the U-shaped snap fit adapts.The snap joint of U-shaped snap fit is the pipe fitting commonly used that pipeline connects in the prior art, be applicable to the quick connection of pipeline, therefore, the utility model easily and fast, improves pressure break or slot operating efficiency by shortening time when being connected with medium force (forcing) pump group with the water source.
The beneficial effects of the utility model are, sanding device is simple in structure, under the volume, and the transfer of the transportation of being convenient to go into the well and using area, and have reduced and add sand labour intensity, reduce underground mine use worker amount, reduce potential safety hazard; The antireflective effect of coal and rock after can improving coal seam cutting efficient or guaranteeing pressure break.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described, but therefore the utility model is not limited among the described practical range.
Referring to Fig. 1, a kind of coal mine underground fracturing or slot sanding device, comprise the water inlet pipe 1, mixing tube 2, the outlet pipe 3 that connect successively, the entrance point of water inlet pipe 1 is used for being connected with the water source, and the pipeline of water inlet pipe 1 is provided with the first motor operated valve 4, the first digital pressure gauge 5, the first electromagnetic flowmeter 6; The port of export of outlet pipe 3 is used for being connected with pressure break or the slot medium access port of medium force (forcing) pump group, and the pipeline of outlet pipe 3 is provided with flap valve 7, the second digital pressure gauge 8, the second electromagnetic flowmeter 9; Described mixing tube 2 is by being communicated with the hopper 11 for splendid attire sand material to sandpipe 10, hopper 11 is positioned at mixing tube 2 tops, is provided with electronic discharge valve 12 and electric brake plate valve 13 for the pipeline of sandpipe 10, and electronic discharge valve 12 is positioned at electric brake plate valve 13 tops; Described the first motor operated valve 4, electronic discharge valve 12 and electric brake plate valve 13 all adopt explosion-proof type; Described water inlet pipe 1, mixing tube 2 and outlet pipe 3 are fixed on the dull and stereotyped mine car 16 by fixed support 15 respectively.
Described mixing tube 2 is comprised of the jet nozzle 21, blending bunker 22 and the mixed flow tube 23 that connect successively, the entrance point of jet nozzle 21 is connected with the port of export of described water inlet pipe 1, jet nozzle 21 is the reducing pipe structure, the minor diameter pipeline section of jet nozzle 21 consists of its jet segment, and the port of export of jet nozzle 21 stretches in the blending bunker 22; Blending bunker 22 is made of straight length 221 and Taper Pipe section 222, and the bore of Taper Pipe section 222 shrinks gradually along the media flow direction; Mixed flow tube 23 comprises flared section 231, the bore of flared section 231 is expanded gradually along the media flow direction, the small end bore of flared section 231 is identical with the Taper Pipe section of blending bunker 22 222 small end bores, and the small end of flared section 231 is communicated with by a straight length with Taper Pipe section 222 small ends of blending bunker 22; The described port of export of sandpipe 10 of giving is communicated with the straight length 221 of blending bunker 22, is positioned at the rear of the port of export of jet nozzle 21 to the outlet of sandpipe 10.
Described jet nozzle 21 comprises the spray orifice 211 that its front end is provided with, and spray orifice 211 diameters are less than the narrow tube diameter of jet nozzle 21, and spray orifice 211 rear ends are provided with tapering afflux section.
Described the first motor operated valve 4, electronic discharge valve 12 and electric brake plate valve 13 outsides are respectively equipped with anti-explosion cover 14, and anti-explosion cover 14 is fixedly connected on the described dull and stereotyped mine car 16.
The port of export of the entrance point of described water inlet pipe 1 and described outlet pipe 3 has the structure that the snap joint with the U-shaped snap fit adapts.
Although more than combine accompanying drawing and described embodiment of the present utility model, but those of ordinary skill in the art can recognize also in the scope to claims and make various variations or modification that these modifications and variations are interpreted as within scope of the present utility model and intention.
Claims (5)
1. a coal mine underground fracturing or slot sanding device, it is characterized in that, comprise the water inlet pipe (1), mixing tube (2), the outlet pipe (3) that connect successively, the entrance point of water inlet pipe (1) is used for being connected with the water source, and the pipeline of water inlet pipe (1) is provided with the first motor operated valve (4), the first digital pressure gauge (5), the first electromagnetic flowmeter (6); The port of export of outlet pipe (3) is used for being connected with pressure break or the slot medium access port of medium force (forcing) pump group, and the pipeline of outlet pipe (3) is provided with flap valve (7), the second digital pressure gauge (8), the second electromagnetic flowmeter (9); Described mixing tube (2) is by being communicated with the hopper (11) for splendid attire sand material to sandpipe (10), hopper (11) is positioned at mixing tube (2) top, be provided with electronic discharge valve (12) and electric brake plate valve (13) for the pipeline of sandpipe (10), electronic discharge valve (12) is positioned at electric brake plate valve (13) top; Described the first motor operated valve (4), electronic discharge valve (12) and electric brake plate valve (13) all adopt explosion-proof type; Described water inlet pipe (1), mixing tube (2) and outlet pipe (3) are fixed on the dull and stereotyped mine car (16) by fixed support (15) respectively.
2. coal mine underground fracturing according to claim 1 or slot sanding device, it is characterized in that: described mixing tube (2) is comprised of the jet nozzle (21), blending bunker (22) and the mixed flow tube (23) that connect successively, the entrance point of jet nozzle (21) is connected with the port of export of described water inlet pipe (1), jet nozzle (21) is the reducing pipe structure, the minor diameter pipeline section of jet nozzle (21) consists of its jet segment, and the port of export of jet nozzle (21) stretches in the blending bunker (22); Blending bunker (22) is made of straight length (221) and Taper Pipe section (222), and the bore of Taper Pipe section (222) shrinks gradually along the media flow direction; Mixed flow tube (23) comprises flared section (231), the bore of flared section (231) is expanded gradually along the media flow direction, the small end bore of flared section (231) is identical with Taper Pipe section (222) the small end bore of blending bunker (22), and the small end of flared section (231) is communicated with by a straight length with Taper Pipe section (222) small end of blending bunker (22); The described port of export of sandpipe (10) of giving is communicated with the straight length (221) of blending bunker (22), is positioned at the rear of the port of export of jet nozzle (21) to the outlet of sandpipe (10).
3. coal mine underground fracturing according to claim 2 or slot sanding device, it is characterized in that: described jet nozzle (21) comprises the spray orifice (211) that its front end is provided with, spray orifice (211) diameter is less than the narrow tube diameter of jet nozzle (21), and spray orifice (211) rear end is provided with tapering afflux section.
4. coal mine underground fracturing according to claim 1 or slot sanding device, it is characterized in that: described the first motor operated valve (4), electronic discharge valve (12) and electric brake plate valve (13) outside are respectively equipped with anti-explosion cover (14), and anti-explosion cover (14) is fixedly connected on the described dull and stereotyped mine car (16).
5. coal mine underground fracturing according to claim 1 or slot sanding device is characterized in that: the port of export of the entrance point of described water inlet pipe (1) and described outlet pipe (3) has the structure that the snap joint with the U-shaped snap fit adapts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568044 CN202850968U (en) | 2012-11-01 | 2012-11-01 | Sand-adding device for coal mine underground fracturing or slotting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568044 CN202850968U (en) | 2012-11-01 | 2012-11-01 | Sand-adding device for coal mine underground fracturing or slotting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202850968U true CN202850968U (en) | 2013-04-03 |
Family
ID=47982178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220568044 Expired - Lifetime CN202850968U (en) | 2012-11-01 | 2012-11-01 | Sand-adding device for coal mine underground fracturing or slotting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202850968U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900417A (en) * | 2012-11-01 | 2013-01-30 | 重庆市能源投资集团科技有限责任公司 | Sand charging device used during fracturing or slotting under coal mine and sand charging control method |
| CN106640025A (en) * | 2017-01-18 | 2017-05-10 | 淮南矿业(集团)有限责任公司 | High-pressure hydro-fracture aggregate adding device for coal seam of mine |
-
2012
- 2012-11-01 CN CN 201220568044 patent/CN202850968U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900417A (en) * | 2012-11-01 | 2013-01-30 | 重庆市能源投资集团科技有限责任公司 | Sand charging device used during fracturing or slotting under coal mine and sand charging control method |
| CN106640025A (en) * | 2017-01-18 | 2017-05-10 | 淮南矿业(集团)有限责任公司 | High-pressure hydro-fracture aggregate adding device for coal seam of mine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102900417A (en) | Sand charging device used during fracturing or slotting under coal mine and sand charging control method | |
| US10613554B2 (en) | Closed circulation system for production of a polymer solution and improving operating efficiency of a gas drainage pump used in a coal mine | |
| CN106640024B (en) | Closed sand mixing device and method | |
| CN104314508A (en) | Hole sealing method for coal bed gas drainage drill hole | |
| CN104295263A (en) | Radial hole sealing device for drill holes for exhausting coal bed gas | |
| CN204436361U (en) | A kind of underground coal mine Hydraulic fracturing pressure flow quantity intelligent adjusting device | |
| CN202850968U (en) | Sand-adding device for coal mine underground fracturing or slotting | |
| CN102230394B (en) | Secondary hole sealing system for improving coal bed gas extraction concentration | |
| CN207750066U (en) | A kind of totally-enclosed mixes defeated decompression cycle gas lift system | |
| CN108019190A (en) | A kind of totally-enclosed mixes defeated decompression circulation gas lift system | |
| CN205135587U (en) | Composite regulation of many wells of polymer partial pressure integration sled dress device | |
| CN206957684U (en) | A kind of roof fracturing system | |
| CN105756637B (en) | A method of coal bed gas recovery ratio is improved beneficial to endogenous microbes using coal seam | |
| CN204330400U (en) | Underground water sampler | |
| CN108915663A (en) | A kind of closed mixing device with pressure worked continuously and method | |
| CN2777199Y (en) | Means for injecting water blocking aggregate for bore-hole slip casting | |
| CN203640772U (en) | Mining pneumatic emulsion moving pump station | |
| CN110388229A (en) | The pipeline of the double resources of coal-water in coal mining system | |
| CN201554463U (en) | Underground laneway grouting equipment | |
| CN104295892B (en) | CO2Fluid reservoir supercharge control system | |
| CN204799150U (en) | Alkali feed proportioning system is annotated in portable coal seam | |
| CN201620865U (en) | Oil-gas separation buffer tank capable of controlling gas output | |
| CN204040999U (en) | A kind of hole diameter for coal-bed gas pump drainage is to hole packer | |
| CN209724305U (en) | A kind of coal-bed-gas production-increase pressure disturbance device | |
| CN111075496B (en) | Device for comprehensively eliminating and suppressing outburst and dust of coal bed by injecting flue gas absorption liquid at low pressure and outburst-eliminating and dust-suppressing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |