Latex matrix delivery reducer

Abstract

The present invention discloses a latex matrix conveying resistance reducer, which is installed between the mixer of the mixing truck and the conveying hose. It is composed of components such as an outer casing, a core body, a rotating rotor, an inner core, and a shunt valve. Its working principle is as follows: The concentrated drag reducer and water are respectively pumped out by a high-pressure pump and shunted at the shunt valve. 15% of the solution is injected into the first mixing zone, and the drag reducer diluted in proportion is ejected from the axial through groove at the front end of the inner core under the action of pressure to form an extremely thin first drag reduction ring, completing the primary drag reduction; the remaining 85% of the concentrated drag reducer and water are injected into the second mixing zone, and the drag reducer diluted in proportion is ejected from the axial through groove at the front end of the core body under the action of pressure to form a drag reduction ring column, which wraps the first drag reduction ring to form the second drag reduction. The existence of the two drag reductions ensures that during the process of conveying the latex matrix to the end of the hose, the latex matrix is always wrapped by the drag reducer, blocking the contact between the latex matrix and the pipe wall and reducing the conveying resistance.

Description

Technical Field

[0001] The present invention relates to a latex matrix conveying device on a mine blasting vehicle and a truck-mounted emulsion explosive charging vehicle, and specifically to a resistance reducer that can reduce the resistance of the latex matrix during the conveying process. Background Art

[0002] The process of on-site blasting operations for mine blasting vehicles and truck-mounted emulsion explosive charging vehicles is as follows: a pump extracts the high-viscosity latex matrix from the silo and conveys it through a hose to the bottom of the blast hole to complete the filling of the blast hole. Compared with the use of commercial explosives for blasting operations, the use of bulk explosives for blasting operations has obvious advantages in terms of production cost, energy conservation, environmental protection, transportation safety, explosion safety, etc. At present, the usage of domestic bulk explosives has not reached 20% of the total explosive usage, which is exactly the opposite of the proportion in developed countries. In recent years, China has been vigorously promoting the use of mine blasting vehicles and truck-mounted emulsion explosive charging vehicles. However, the main reason for the current lack of promotion is that the latex matrix is a high-viscosity matrix and is prone to sticking to the inner surface of the hose during the conveying process, forming a large resistance. Especially for long-distance conveyances of more than 30 m and small-diameter hoses with a diameter of less than 50 mm, the conveying pressure is easily exceeded the maximum conveying pressure of 1.2 MPa stipulated by the state, resulting in explosions of mine blasting vehicles and truck-mounted emulsion explosive charging vehicles and extremely likely causing safety accidents.

[0003] There are mainly two existing resistance reduction methods. One is non-sticking to the pipe, and the other is to use a resistance reducer for resistance reduction. At present, due to material reasons, there has been no breakthrough in non-sticking to the pipe, and resistance reduction using a resistance reducer is currently the most economical and feasible solution. However, the existing resistance reducers have a series of problems such as large processing difficulty, unobvious resistance reduction effect, and the need to provide a large amount of resistance reducing agent during the use process. Summary of the Invention

[0004] In view of the problems existing in the current latex matrix, the present invention provides a new type of resistance reducer. This new type of resistance reducer not only ensures the stability of resistance reduction and improves the product performance, but also only needs to provide a small amount of concentrated resistance reducing agent during the use process of the resistance reducer to complete the resistance reduction, greatly reducing the transportation of the resistance reducing agent and reducing the transportation and use costs.

[0005] To achieve the above functions, the technical solution adopted by the present invention is as follows: This latex matrix conveying flow reducer includes an outer sleeve (1), a core body (2), a second rotating rotor (3), a first shut-off valve (4), an O-ring (5), an inner core (6), a first rotating rotor (7), a second shut-off valve (8), a first flow divider valve (9), a second flow divider valve (10), a third shut-off valve (11), and a fourth shut-off valve (12). It is characterized in that: The core body (2) connects the outer sleeve (1) and the inner core (6). The front end of the core body (2) is sleeved inside the outer sleeve (1), and a mixing zone 2 is formed between the outer surface of the front end of the core body (2) and the inner surface of the outer sleeve (1). The second rotating rotor (3) is installed in the mixing zone 2; The inner core (6) is sleeved inside the rear end of the core body (2), and a mixing zone 1 is formed between the outer surface of the inner core (6) and the inner surface of the core body (2). The first rotating rotor (7) is installed in the mixing zone 1.

[0006] In the above-mentioned latex matrix conveying flow reducer, N axially through grooves with exactly the same shape, size, and precision are uniformly opened on the entire circumference of the outer part of the front end of the core body (2); M axially through grooves with exactly the same shape, size, and precision are uniformly opened on the entire circumference of the outer part of the front end of the inner core (6).

[0007] In the above-mentioned latex matrix conveying flow reducer, two through pipe threaded holes of the same size are symmetrically opened on the outer sleeve (1); Two through pipe threaded holes of the same size are symmetrically opened on the outer surface of the rear end of the core body (2).

[0008] In the above-mentioned latex matrix conveying flow reducer, the first rotating rotor (7) and the second rotating rotor (3) are axially provided with rotating grooves that are lower in the middle and higher on both sides; M1 and M2 rows of holes penetrating the inner and outer circles are respectively and uniformly opened axially, and H1 and H2 rows of holes penetrating the inner and outer circles are respectively opened circumferentially.

[0009] In the above-mentioned latex matrix conveying flow reducer, the concentrated drag reducer is divided by the first flow divider valve (9) and then flows through the first shut-off valve (4), and flows into the mixing zone 2 from the threaded hole of the outer sleeve (1); The high-pressure water is divided by the second flow divider valve (10) and then flows through the fourth shut-off valve (12), and flows into the mixing zone 2 from another symmetric threaded hole on the outer sleeve (1).

[0010] In the above-mentioned latex matrix conveying flow reducer, the concentrated drag reducer is divided by the first flow divider valve (9) and then flows through the second shut-off valve (8), and flows into the mixing zone 1 from the threaded hole at the rear end of the core body (2); The high-pressure water is divided by the second flow divider valve (10) and then flows through the third shut-off valve (11), and flows into the mixing zone 1 from another symmetric threaded hole on the core body (2).

[0011] In the above-mentioned latex matrix conveying drag reducer, the concentrated drag reducer is used as a drag-reducing lubricant, and the ratio (volume ratio) with water ranges from 1:50 to 1:100. The ratio (volume ratio) of the drag reducer diluted with water to the latex matrix ranges from 2.5% to 3.5%. The concentrated drag reducer flowing into the mixing area 1 through the first diverter valve (9) accounts for 15% (volume ratio) of the concentrated drag reducer.

[0012] In the above-mentioned latex matrix conveying drag reducer, the inner surface of the core body (2) in the axial direction (from the middle plane of the core body to the front end of the core body) is a tapered tube, and the range of the angle A between the inner surface and the horizontal axis is 0.1° - 3°.

[0013] In the above-mentioned latex matrix conveying drag reducer, the outer sleeve (1) is connected to the core body (2), and the core body (2) is connected to the inner core (6) by threads or welding. There are positioning steps at the mating part of the core body (2) and the outer sleeve (1), and there are positioning steps at the mating part of the inner core (6) and the core body (2). The coaxiality and mating accuracy of the two positioning steps ensure that the core body (2) and the outer sleeve (1), and the core body (2) and the inner core (6) do not deflect during assembly.

[0014] The working principle of the latex matrix conveying drag reducer is as follows: The concentrated drag reducer and water are respectively pumped out by high-pressure pumps and diverted by the diverter valve. 15% of the solution is injected into the first mixing area. The drag reducer diluted in proportion is ejected from the axial through groove at the front end of the inner core (6) under pressure to form an extremely thin first drag-reducing ring, completing the primary drag reduction. The remaining 85% of the concentrated drag reducer and water are injected into the second mixing area. The drag reducer diluted in proportion is ejected from the axial through groove at the front end of the core body (1) under pressure to form a drag-reducing ring column, which wraps the first drag-reducing ring to form the second drag reduction. The existence of the two drag reductions ensures that during the process of conveying the latex matrix to the end of the hose, the latex matrix is always wrapped by the drag reducer, blocking the contact between the latex matrix and the pipe wall, reducing the conveying resistance, and effectively ensuring that the maximum pressure of the latex matrix during conveying is below 0.3 MPa, the conveying pipe diameter The conveying distance is more than 100 m, fully meeting the requirements of blast hole loading and blasting. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the latex matrix conveying drag reducer.

[0016] Figure 2 It is a schematic diagram of the structure of the inner core 6.

[0017] Figure 3 It is Figure 2 The cross-sectional view along the A-A line in

[0018] Figure 4 It is a schematic diagram of the structure of the core body 2.

[0019] Figure 5 is Figure 4 The sectional view along line B - B in the figure.

[0020] Names and serial numbers of components in the figure: 1 - outer jacket, 2 - core body, 3 - second rotating rotor, 4 - first shut - off valve, 5 - O - ring seal, 6 - inner core, 7 - first rotating rotor, 8 - second shut - off valve, 9 - first flow - dividing valve, 10 - second flow - dividing valve, 11 - third shut - off valve, 12 - fourth shut - off valve. Detailed implementation manners

[0021] The following describes the specific implementation manners in conjunction with the attached drawings, but the content of the present invention is not limited thereto.

[0022] As Figure 1 described, the latex matrix conveying flow reducer includes an outer jacket (1), a core body (2), a second rotating rotor (3), a first shut - off valve (4), an O - ring seal (5), an inner core (6), a first rotating rotor (7), a second shut - off valve (8), a first flow - dividing valve (9), a second flow - dividing valve (10), a third shut - off valve (11), and a fourth shut - off valve (12), and is characterized in that: the core body (2) connects the outer jacket (1) and the inner core (6), the front end of the core body (2) is sleeved inside the outer jacket (1), a mixing zone 2 is formed between the outer surface of the front end of the core body (2) and the inner surface of the outer jacket (1), and the second rotating rotor (3) is installed in the mixing zone 2; the inner core (6) is sleeved inside the rear end of the core body (2), a mixing zone 1 is formed between the outer surface of the inner core (6) and the inner surface of the core body (2), and the first rotating rotor (7) is installed in the mixing zone 1.

[0023] As Figure 2 and 3 shown, there are 10 axially - through grooves on the entire circumference of the outer part of the front end of the inner core (6) with the same shape, size and precision.

[0024] As Figure 4 and 5 shown, 10 axially - through grooves with the same shape, size and precision are evenly arranged on the entire circumference of the outer part of the front end of the core body (2).

[0025] As Figure 1 shown, two through - hole threaded holes of the same size are symmetrically arranged on the outer jacket (1); two through - hole threaded holes of the same size are symmetrically arranged on the outer surface of the rear end of the core body (2).

[0026] As Figure 1 shown, the first rotating rotor (7) and the second rotating rotor (3) are axially provided with rotating grooves that are lower in the middle and higher on both sides; 3 and 3 rows of holes penetrating the inner and outer circles are respectively and evenly arranged axially, and 6 and 6 rows of holes penetrating the inner and outer circles are respectively arranged circumferentially.

[0027] As Figure 1 shown, the concentrated drag reducer flows through the first shut-off valve (4) after being branched by the first flow divider valve (9), and flows into the mixing zone 2 from the threaded hole of the outer sleeve (1); high-pressure water flows through the fourth shut-off valve (12) after being branched by the second flow divider valve (10), and flows into the mixing zone 2 from another symmetric threaded hole on the outer sleeve (1).

[0028] As Figure 1 shown, the concentrated drag reducer flows through the second shut-off valve (8) after being branched by the first flow divider valve (9), and flows into the mixing zone 1 from the threaded hole at the rear end of the core body (2); high-pressure water flows through the third shut-off valve (11) after being branched by the second flow divider valve (10), and flows into the mixing zone 1 from another symmetric threaded hole on the core body (2).

[0029] As Figure 1 shown, when the latex matrix conveying drag reducer is implemented, the flow directions of the concentrated drag reducer, water, and latex matrix are as shown by the arrow in the figure.

[0030] The concentrated drag reducer is used as a drag-reducing lubricant, and its ratio to water (volume ratio) is 1:100. The ratio of the drag reducer diluted by water to the latex matrix (volume ratio) is 3%; the concentrated drag reducer flowing into the mixing zone 1 through the first flow divider valve (9) (volume ratio) accounts for 15% of the concentrated drag reducer.

[0031] As Figure 1 shown, the inner surface of the core body (2) in the axial direction (from the mid-plane of the core body to the front end of the core body) is a tapered tube, and the range of the angle A between the inner surface and the horizontal axis is 1°.

[0032] As Figure 1 shown, the outer sleeve (1) is connected to the core body (2), and the core body (2) is connected to the inner core (6) by threads. There are positioning steps at the mating part of the core body (2) and the outer sleeve (1), and there are positioning steps at the mating part of the inner core (6) and the core body (2). The coaxiality and mating accuracy of the two positioning steps should ensure that there is no skew during the assembly of the core body (2) and the outer sleeve (1), and the core body (2) and the inner core (6).

Claims

1. Latex matrix delivery reducer, comprising an outer sleeve (1), a core body (2), a second rotating rotor (3), a first shut-off valve (4), an O-ring seal (5), an inner core (6), a first rotating rotor (7), a second shut-off valve (8), a first diverter valve (9), a second diverter valve (10), a third shut-off valve (11), a fourth shut-off valve (12), characterized in that: The core body connects the outer sleeve and the inner core. The front end of the core body is sleeved inside the outer sleeve. A mixing zone 2 is formed between the outer surface of the front end of the core body and the inner surface of the outer sleeve. The second rotating rotor is installed in the mixing zone 2. The inner core is sleeved inside the rear end of the core body. A mixing zone 1 is formed between the outer surface of the inner core and the inner surface of the core body. The first rotating rotor is installed in the mixing zone 1. N axially through slots with exactly the same shape, size and precision are uniformly opened on the entire circumference of the outer part of the front end of the core body. M axially through slots with exactly the same shape, size and precision are uniformly opened on the entire circumference of the outer part of the front end of the inner core. The concentrated drag reducer is shunted by the first flow dividing valve and then flows through the first shut-off valve, and flows into the mixing zone 2 from the threaded hole of the outer sleeve. The high-pressure water is shunted by the second flow dividing valve and then flows through the fourth shut-off valve, and flows into the mixing zone 2 from another symmetric threaded hole on the outer sleeve. The concentrated drag reducer is shunted by the first flow dividing valve and then flows through the second shut-off valve, and flows into the mixing zone 1 from the threaded hole at the rear end of the core body. The high-pressure water is shunted by the second flow dividing valve and then flows through the third shut-off valve, and flows into the mixing zone 1 from another symmetric threaded hole on the core body. The drag reducer is ejected from the axially through slots at the front end of the inner core under pressure to form the first drag reduction ring, completing the primary drag reduction. The remaining drag reducer and water are injected into the second mixing zone. The drag reducer diluted in proportion is ejected from the axially through slots at the front end of the core body under pressure to form a drag reduction ring column, wrapping the first drag reduction ring to form the secondary drag reduction. The concentrated drag reducer is used as a drag reduction lubricant, and the volume ratio range of its ratio with water is 1:50 - 1:

100. The volume ratio range of the drag reducer diluted with water and the emulsion matrix is 2.5% - 3.5%. The volume ratio of the concentrated drag reducer shunted by the first flow dividing valve and flowing into the mixing zone 1 accounts for 15% of the concentrated drag reducer. The inner surface of the core body is a tapered tube axially from the middle plane of the core body to the front end of the core body. The range of the angle A between the inner surface and the horizontal axis is 0.1° - 3°.

2. The latex matrix delivery reducer according to claim 1, wherein: Two symmetrically opened through-pipe threaded holes of the same size are opened on the outer surface of the outer sleeve. Two symmetrically opened through-pipe threaded holes of the same size are opened on the outer surface at the rear end of the core body.

3. The latex matrix delivery reducer according to claim 1, wherein: The first rotating rotor and the second rotating rotor are axially provided with rotating grooves that are low in the middle and high on both sides. M1 and M2 rows of holes penetrating the inner and outer circles are respectively and uniformly opened axially, and H1 and H2 rows of holes penetrating the inner and outer circles are respectively opened circumferentially.

4. The latex matrix delivery reducer according to claim 1, characterized in that: The outer sleeve is connected to the core body, and the core body is connected to the inner core by threads or welding. There are positioning steps at the mating part of the core body and the outer sleeve, and there are positioning steps at the mating part of the inner core and the core body. The coaxiality and mating precision of the two positioning steps should ensure that the core body and the outer sleeve, and the core body and the inner core do not produce skew during assembly.

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