A gas generating tool powder column sealing end cover and sealing device

Abstract

A gas-generating device drug column sealing end cap and sealing device, the sealing end cap comprises a circular cover plate, a three-layer cylinder standing on the inner surface of the circular cover plate, the three-layer cylinder is a concentric cylinder extending axially inward from the inner surface of the circular cover plate, and the three-layer cylinder comprises an outer cylinder, an inner cylinder and a center cylinder; a positioning cavity 1 for positioning the end of the outer tube is formed between the inner wall of the outer cylinder and the outer wall of the inner cylinder, the inner surface of the circular cover plate between the inner wall of the outer cylinder and the outer wall of the inner cylinder is the bottom surface of the positioning cavity; a positioning cavity 2 for positioning the end of the center tube is formed between the center cylinder and the inner circle of the circular cover plate. The sealing end cap can completely cover the edge of the outer tube to avoid drug leakage at both ends of the drug column, greatly reducing the safety hazards caused by drug leakage during production and transportation, and also improving the waterproof function of the drug column; the end cap and the outer tube are tightly assembled without the need for the process of tape sealing, thereby improving the production efficiency of the gas-generating device.

Description

Technical Field

[0001] The invention relates to a gas production tool charge column sealing end cover and a sealing device used in the rock coal field. Background Art

[0002] Gas generators are mainly used in coal mining, such as coal seam pre-splitting, hard top coal caving, hard roof treatment, rock pre-splitting blasting, working face fault treatment, tunneling, rock burst prevention and control, coal-rock tunneling, etc. The application effect is good, which not only brings huge economic benefits to coal mines, but also eliminates the safety hazard of roof falling.

[0003] The gas generator column structure consists of three parts: the end cap, the outer tube, and the center tube. The inner side of the outer tube, the outer side of the center tube and the end caps at both ends form a closed annular cavity for accommodating the gas generator. The ignition device is inserted into the middle of the center tube. The ignition charge in the ignition device is electrically excited to generate high temperature to ignite the gas generator. The existing gas generator device has the following four problems: (1) The two layers of the cylinders of the end cap are of the same height. After the charge is loaded, it is difficult for the end cap to align with the center tube, and the efficiency of the end cap buckle is extremely low. (2) The material of the center tube is relatively soft and it is very easy to deform after the charge is loaded, which increases the difficulty of buckling the end cap. (3) The end cap has poor sealing and is easy to leak, posing a safety hazard. There is a certain gap between the end cap and the outer tube. When the gas generator is filled by shaking up and down, the powder will leak out from the gap and adhere to the end cap and the charging table. The gas-generating medicine column is shaken continuously to make the powder inside the medicine column more compact. The end cap at the bottom of the entire medicine column constantly hits the powder on the table, which poses a safety risk. During transportation, the gas-generating medicine leaks out from the gap of the end cap, increasing the safety hazard. (4) The end cap has poor sealing and is easy to absorb moisture, shortening the service life of the gas-generating medicine. Water can penetrate from the gap between the end cap and the outer tube, seriously affecting the use effect of the gas-generating medicine. The environment must be strictly controlled during transportation, storage and use to avoid water seepage into the gas-generating medicine, which will affect the life of the medicine. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a gas generating device charge column end cover with good sealing performance and waterproofness.

[0005] Another object of the present invention is to provide a gas generating tool charge column sealing device.

[0006] The technical solution of the present invention is: a gas-generating tool column sealing end cover, including a circular cover plate, and a three-layer cylinder standing on the inner surface of the circular cover plate, the three-layer cylinder is a concentric cylinder extending axially inward from the inner surface of the circular cover plate, and the three-layer cylinder includes an outer cylinder, an inner cylinder and a center cylinder; a positioning cavity 1 for positioning the end of the outer tube is formed between the inner wall of the outer cylinder and the outer wall of the inner cylinder, and the inner surface of the circular cover plate between the inner wall of the outer cylinder and the outer wall of the inner cylinder is the bottom surface of the positioning cavity; a positioning cavity 2 for positioning the end of the center tube is formed between the center cylinder and the inner circle of the circular cover plate.

[0007] The three-layer cylinder is a concentric cylinder extending axially inward from the inner surface of the annular cover plate.

[0008] The axes of the outer cylinder, the inner cylinder and the central cylinder coincide with the center of the inner ring of the annular cover plate, and the diameter of the inner ring is smaller than the inner diameter of the central tube.

[0009] The inner wall of the inner cylinder and the inner wall of the central cylinder are cylindrical surfaces, the outer wall of the inner cylinder and the inner wall of the central cylinder are frustum surfaces, the cross-sectional area of ​​the first positioning cavity gradually increases inwardly along the axial direction, and the cross-sectional area of ​​the second positioning cavity gradually increases inwardly along the axial direction.

[0010] The length of the central cylinder is greater than that of the inner cylinder, within the range of 2 to 10 mm, and the length of the inner cylinder is greater than that of the outer cylinder, within the range of 1 to 5 mm.

[0011] The length of the central cylinder is 13-20 mm and the thickness is 1.3±0.3 mm; the length of the inner cylinder is 11-15 mm and the thickness is 1.5±0.2 mm; the length of the outer cylinder is 10±0.5 mm and the thickness is 1.0±0.2 mm; the angle between the inner wall of the central cylinder and the axis is α / 2, α / 2=2±0.5°; the angle between the outer wall of the inner cylinder and the axis is β / 2, β / 2=2.5±0.5°.

[0012] The outer wall of the inner cylinder is chamfered, and the inner wall of the central cylinder is chamfered.

[0013] The inner diameter of the annular cover plate is 11.5±0.5 mm.

[0014] A gas-producing tool charge column sealing device comprises an outer tube and a central tube placed in the inner cavity of the outer tube, an annular accommodating cavity for accommodating gas-producing charge is formed between the inner wall of the outer tube and the outer wall of the central tube, and both ends of the outer tube and the central tube are provided with sealing end covers as described above; the sealing end cover comprises a circular cover plate and a three-layer cylinder standing on the inner surface of the circular cover plate, the three-layer cylinder comprises an outer cylinder, an inner cylinder and a central cylinder; a positioning cavity 1 for positioning the end of the outer tube is formed between the inner wall of the outer cylinder and the outer wall of the inner cylinder, and the inner surface of the circular cover plate between the inner wall of the outer cylinder and the outer wall of the inner cylinder is the bottom surface of the positioning cavity; the middle part of the circular cover plate is an inner ring for inserting the ignition tool and leading out the ignition tool blasting line, a positioning cavity 2 for positioning the end of the central tube is formed between the central cylinder and the inner ring of the circular cover plate, one end of the central tube is inserted into the central cylinder, and the end of the central tube abuts against the inner surface of the circular cover plate.

[0015] The cross-sectional width of the annular accommodating cavity is 4.5±0.5 mm.

[0016] The height of the central cylinder of the end cap of the gas generator powder column of the present invention is greater than the height of the inner cylinder, which is conducive to the alignment of the central cylinder with the central tube, and the height of the inner cylinder is greater than the height of the outer cylinder, which is conducive to the alignment of the inner cylinder with the inner circle of the outer tube. The sealed end cap is buckled on the central tube and the outer tube layer by layer, which greatly improves the buckling efficiency of the end cap; the outer edge of the inner cylinder and the inner edge of the central cylinder of the sealed end cap are both chamfered, which is very conducive to the buckling of the end cap after the filling is completed; the inverted triangle formed by the inner wall and the outer wall of the three-layer cylinder is tightly assembled with the outer tube and the central tube, which greatly improves the sealing of the gas generator powder column; the sealed end cap can completely cover the edge of the outer tube to avoid the phenomenon of drug leakage at both ends of the drug column, greatly reduce the safety hazards caused by drug leakage during production and transportation, and also improve the waterproof function of the drug column; the end cap and the outer tube are tightly assembled without the need for a tape sealing process, which improves the production efficiency of the gas generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a gas-generating tool grain sealing device;

[0018] Figure 2 It is a structural schematic diagram of the sealing end cover;

[0019] In the figure, 1, sealing end cover 1, 2, outer tube, 3, center tube, 4, ignition device, 11, circular ring cover plate, 12, outer cylinder, 13, inner cylinder, 14, center cylinder. DETAILED DESCRIPTION

[0020] Figure 1 , 2 In the process, the center tube 3 is rotatably inserted into the left sealing end cover 1, the center tube 3 is fitted with the inner surface of the center cylinder 13 of the sealing end cover 1, and the center tube 3 is butted against the inner surface of the annular cover plate 14 of the sealing end cover 1.

[0021] Insert the outer tube 2 into the left sealing end cap 1 in a rotating manner, so that the inner wall of the outer tube 2 fits with the outer surface of the inner cylinder 12 of the sealing end cap 1, and the outer wall of the outer tube 2 fits with the inner surface of the outer cylinder 11 of the sealing end cap 1. The sealing end cap 1 completely covers the edge of the outer tube 2, and completely seals the gas-producing medicine in the annular accommodating cavity, so that there will be no leakage during loading and transportation. The length of the central cylinder 13 of the sealing end cap 1 is greater than that of the inner cylinder 12, and the length of the inner cylinder 12 is greater than that of the outer cylinder 11. The structure of the sealing end cap 2 is the same as that of the sealing end cap 1. The angle between the inner wall of the central cylinder and the axis is α / 2, α / 2=2°; the angle between the outer wall of the inner cylinder 12 and the axis is β / 2, β / 2=2.5°.

[0022] After filling the gas generating medicine from the right side of the gas generating device, align the central cylinder of the sealing end cap 2 with the central tube 3. After the central cylinder is buckled on the central tube 3, align the inner cylinder with the inner wall of the outer tube 2. After the inner cylinder is inserted into the inner wall of the outer tube, the outer cylinder can easily cover the outer wall of the outer tube. The heights of the outer cylinder 11, inner cylinder 12 and central cylinder 13 of the sealing end cap 1 / 2 are in a stepped shape. Buckling the central tube 3 and the outer tube 2 layer by layer can avoid the deformation of the outer tube 2 due to the medicine loading and the inability to buckle the cap normally; it can also avoid the outer tube 2 being unable to buckle the end cap due to a certain deviation in thickness during the production of the outer tube 2.

[0023] Insert the ignition device 4 to the middle of the device from the second inner circle of the sealing end cover on the right side of the gas producing device, and lead out the blasting line from the second inner circle of the sealing end cover on the right side of the gas producing device.

[0024] Assembly scheme 1: first connect the left sealing end cap 1 with the central tube 3 and the outer tube 2, and then put the gas generating agent from Figure 1 The right end is poured into the annular accommodating cavity, and the right sealing end cover 2 is buckled. The ignition device 4 is inserted into the inner circle of the right sealing end cover 2, and the blasting line is led out from the inner circle of the sealing end cover 2.

[0025] Assembly plan 2: Connect the right sealing end cap 2 with the central tube and outer tube, and then put the gas generating agent from Figure 1 The left end is poured into the annular accommodating cavity, and the left side is buckled with a sealing end cover 1.

[0026] When in use, the gas generator with the built-in igniter 4 is placed in the blast hole, and the igniter 4 is excited after power is turned on, thereby igniting the gas generating powder. The present invention improves the buckling efficiency of the end cap and the sealing of the gas generator powder column; avoids the phenomenon of powder leakage at both ends of the traditional gas generator powder column, reduces the safety hazards caused by the leakage of powder in production and transportation, and improves the waterproof effect of the powder column; reduces the tape sealing process and improves the production efficiency.

Claims

1. A gas generating device with a powder column sealing end cap, characterized in that: It comprises a circular cover plate (14) and three layers of cylinders standing on the inner surface of the circular cover plate (14), wherein the three layers of cylinders are concentric cylinders extending axially inward from the inner surface of the circular cover plate (14), and the three layers of cylinders comprise an outer cylinder (11), an inner cylinder (12) and a central cylinder (13); a first positioning cavity for positioning the end of the outer tube (2) is formed between the inner wall of the outer cylinder (11) and the outer wall of the inner cylinder (12); the inner surface of the circular cover plate (14) between the inner wall of the outer cylinder (11) and the outer wall of the inner cylinder (12) is the bottom surface of the positioning cavity; and a second positioning cavity for positioning the end of the central tube (3) is formed between the central cylinder (13) and the inner ring of the circular cover plate (14); The length of the central cylinder (13) is greater than the length of the inner cylinder (12), and the length of the inner cylinder (12) is greater than the length of the outer cylinder (11); The length of the central cylinder (13) is 13-20 mm, and the thickness is 1.3±0.3 mm; the length of the inner cylinder (12) is 11-15 mm, and the thickness is 1.5±0.2 mm; the length of the outer cylinder (11) is 10±0.5 mm, and the thickness is 1.0±0.2 mm; the angle between the inner wall of the central cylinder and the axis is α / 2, α / 2=2±0.5°; the angle between the outer wall of the inner cylinder (12) and the axis is β / 2, β / 2=2.5±0.5°.

2. The gas generating device charge column sealing end cap according to claim 1, characterized in that: The axes of the outer cylinder (11), the inner cylinder (12) and the central cylinder (13) coincide with the center of the inner ring of the annular cover plate (14), and the diameter of the inner ring is smaller than the inner diameter of the central tube (3).

3. The gas generating device charge column sealing end cap according to claim 1, characterized in that: The inner wall of the inner cylinder (12) and the outer wall of the central cylinder (13) are cylindrical surfaces, the outer wall of the inner cylinder (12) and the inner wall of the central cylinder (13) are frustum surfaces, the cross-sectional area of ​​the first positioning cavity gradually increases inwardly along the axial direction, and the cross-sectional area of ​​the second positioning cavity gradually increases inwardly along the axial direction.

4. The gas generating device charge sealing end cap according to claim 1, characterized in that: The outer wall of the inner cylinder (12) is chamfered, and the inner wall of the central cylinder (13) is chamfered.

5. The gas generating device charge sealing end cap according to claim 1, characterized in that: The inner diameter of the annular cover plate (14) is 11.5±0.5 mm.

6. A gas generating tool charge column sealing device, characterized in that: It comprises an outer tube (2) and a central tube (3) disposed in the inner cavity of the outer tube (2), an annular cavity for accommodating gas generating agent is formed between the inner wall of the outer tube (2) and the outer wall of the central tube (3), and both ends of the outer tube (2) and the central tube (3) are provided with sealing end caps as claimed in any one of claims 1 to 5; The sealing end cover comprises a circular cover plate (14), and three layers of cylinders standing on the inner surface of the circular cover plate (14), wherein the three layers of cylinders comprise an outer cylinder (11), an inner cylinder (12) and a center cylinder (13); a first positioning cavity for positioning the end of the outer tube (2) is formed between the inner wall of the outer cylinder (11) and the outer wall of the inner cylinder (12); the inner surface of the circular cover plate (14) between the inner wall of the outer cylinder (11) and the outer wall of the inner cylinder (12) is the bottom surface of the positioning cavity; the middle portion of the circular cover plate (14) is an inner ring for inserting the ignition device (4) and leading out the blasting line of the ignition device (4); a second positioning cavity for positioning the end of the center tube (3) is formed between the center cylinder (13) and the inner ring of the circular cover plate (14); one end of the center tube (3) is inserted into the center cylinder, and the end of the center tube (3) abuts against the inner surface of the circular cover plate (14).

7. The gas generating tool charge sealing device according to claim 6, characterized in that: The cross-sectional width of the annular accommodating cavity is 4.5±0.5 mm.

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