CN112902776B - Expansion sealing sleeve of high-voltage electromagnetic blasting device - Google Patents
Expansion sealing sleeve of high-voltage electromagnetic blasting device Download PDFInfo
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- CN112902776B CN112902776B CN202110229408.6A CN202110229408A CN112902776B CN 112902776 B CN112902776 B CN 112902776B CN 202110229408 A CN202110229408 A CN 202110229408A CN 112902776 B CN112902776 B CN 112902776B
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- 238000005422 blasting Methods 0.000 title claims abstract description 67
- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 239000013013 elastic material Substances 0.000 claims abstract description 13
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses an expansion sealing sleeve of a high-voltage electromagnetic force blasting device, which comprises an expansion shaft, an expansion sleeve, an expansion pipe and an expansion body, wherein the expansion body is in threaded connection with two ends of the expansion shaft, the expansion sleeve is sleeved outside the expansion shaft, the expansion sleeve is wrapped outside the expansion pipe, and the expansion body is respectively connected with an upper cylinder and a lower cylinder of the high-voltage electromagnetic force blasting device; when the expansion seal is used, the expansion shaft is rotated to drive the expansion body to move from two ends to the middle along the axial direction so as to open the expansion pipe to extrude the expansion sleeve to seal the gap between the high-voltage electromagnetic blasting device and the blasting hole. According to the invention, the expansion sleeve is driven by the expansion pipe to prop up the expansion body to seal the gap between the high-voltage electromagnetic blasting device and the blasting hole, the cylindrical expansion pipe formed by splicing the multi-tile expansion sheets is adopted to extrude the expansion sleeve, and the sealing sleeve can meet the blasting requirement by providing sealing strength and sealing effect for sealing the gap between the high-voltage electromagnetic blasting device and the blasting hole through the joint of the rigid material and the elastic material.
Description
Technical Field
The invention relates to the technical field of high-voltage electromagnetic force blasting, in particular to an expansion sealing sleeve of a high-voltage electromagnetic force blasting device.
Background
In large projects such as railways, highways, mines, reservoirs and the like, the role of the blasting technique is important. The mining and repairing mountain-digging tunnel, and the demolishing of old building in city can use blasting technique. With the development of economy and the increase of engineering construction, blasting attracts more attention. As is well known, the current blasting technology uses explosives for blasting, however, the variety of explosives has different effects on components, is difficult to control accurately, has great potential safety hazards in transportation, storage and management, and is dangerous.
The high-voltage electromagnetic blasting refers to a blasting mode that a blasting medium is instantaneously gasified by instantaneously discharging high voltage in a closed space and then blasts in the closed space to achieve a blasting target. The high-voltage electromagnetic blasting has the advantages of safe and reliable transportation, storage and management, and can accurately control the explosion equivalent by controlling discharge. Therefore, the high-pressure piezomagnetic blasting can completely replace the traditional explosive blasting technology.
However, high-pressure electromagnetic blasting requires detonation in a closed space, and sealing of a blasthole after the electromagnetic blasting device is put in becomes a difficult problem, and a sufficient sealing effect and a sufficient strength against impact force during blasting are required. Thus, the sealing of the blast hole has been a bottleneck limiting the development of electromagnetic force blast.
Disclosure of Invention
According to the expansion sealing sleeve of the high-voltage electromagnetic force blasting device, the gap between the high-voltage electromagnetic force blasting device and the blasthole is sealed through the mechanical extrusion elastic sleeve, so that the required sealing effect and sealing strength are met, the impact force of the high-voltage electromagnetic force blasting is completely released in a target space, and the efficiency of the high-voltage electromagnetic force blasting is improved.
The embodiment of the invention provides an expansion sealing sleeve of a high-voltage electromagnetic blasting device, which comprises an expansion shaft 1, an expansion sleeve 2, an expansion pipe 3 and an expansion body 4, wherein the expansion shaft 1 is of a cylindrical shape with hollow inside, external threads 11 with opposite rotation directions are respectively arranged on the outer circumferences of two ends of the expansion shaft 1, the expansion sleeve 2 is of a cylindrical shape made of elastic sealing materials, the expansion pipe 3 is of a cylindrical shape formed by splicing tile-shaped expansion sheets 31 with the same shape and the same size, two ends of the inner cylinder of the expansion pipe 3 are respectively provided with an inner conical surface 32 which is gradually decreased inwards along the axial direction, the inner conical surfaces 32 are respectively provided with the same rotation axis as the expansion pipe 3, the expansion body 4 is provided with two conical tables, the conical tables of the expansion body 4 are axially provided with through holes, the conical tables and the through holes of the expansion body 4 are respectively provided with the same rotation axis as the expansion body 4, the through holes of the expansion body 4 are internally provided with internal threads 41, the internal threads 41 are matched with the external threads 11, and the external conical surfaces 42 of the expansion body 4 are the conical surfaces are the same as the conical surfaces 32; the through hole of the expansion body 4 is connected with two ends of the expansion shaft 1 in a threaded manner, the expansion pipe 3 is sleeved outside the expansion shaft 1, the expansion sleeve 2 is wrapped outside the expansion pipe 3, and the expansion body 4 is respectively connected with the upper cylinder 5 and the lower cylinder 6 of the high-voltage electromagnetic blasting device; when the expansion seal is used, the expansion shaft 1 is rotated to drive the expansion body 4 to move from two ends to the middle along the axial direction, so that the expansion pipe 3 is expanded to extrude the expansion sleeve 2 to seal a gap between the piezoelectric magnetic force blasting device and the blasting hole 7.
Preferably, the conical bottom of the expansion body 4 is provided with an annular baffle plate 43, the baffle plate 43 and the expansion body 4 rotate together, an axial expansion ring 8 is arranged between the baffle plate 43 and the end face of the expansion sleeve 2, and the axial expansion ring 8 is made of elastic materials; the axial expansion ring 8 keeps the end face of the expansion sleeve 2 to be synchronously pushed by the axial force exerted by the baffle plate 43 when the expansion body 4 moves towards the middle, so that the expansion sleeve 2 is ensured not to be extruded towards two ends when being extruded by the expansion pipe 3, and the sealing effect of the expansion sleeve 2 on a gap between the high-voltage electromagnetic blasting device and the blasting hole 7 in the radial direction is ensured, and therefore, the hardness of an elastic material of the axial expansion ring 8 is greater than that of the expansion sleeve 2.
More preferably, the inner hole of the axial expansion ring 8 is conical and the taper is the same as the outer conical surface 42; the taper of the inner hole of the axial expansion ring 8 ensures that the axial expansion ring 8 and the outer conical surface 42 of the expansion body 4 keep self-deformation during the co-extrusion movement, so that the end surface of the axial expansion ring 8 keeps a pushing plane smooth during the pushing of the end surface of the expansion sleeve 2, and good pushing effect is ensured.
Preferably, the orifices at the two ends of the cylinder of the expansion sleeve 2 are provided with conical flare 21, the taper of the flare 21 is the same as that of the outer conical surface 42, a radial expansion ring 9 is arranged between the flare 21 and the outer conical surface 42, and the radial expansion ring 9 is made of elastic materials; the radial expansion ring 9 pushes the two ends of the expansion sleeve 2 radially outwards while the expansion body 4 moves axially relative to the expansion pipe 3, so that the two ends of the expansion sleeve 2 cannot be weakened in sealing effect due to the edge of the expansion pipe 3, and therefore the hardness of the elastic material of the radial expansion ring 9 is greater than that of the expansion sleeve 2.
More preferably, the inner hole surface and the outer circumferential surface of the radial expansion ring 9 are conical, and the taper is the same as that of the outer conical surface 42; the taper of the inner hole surface and the outer circumferential surface of the radial expansion ring 9 ensures that the radial expansion ring 9 keeps self-deformation when the outer conical surface 42 of the expansion body 4 is extruded, and gives better radial pushing effect to the two ends of the expansion sleeve 2.
Preferably, the outer circumference of the expansion pipe 3 is provided with an annular groove 33, an annular hoop 34 is arranged in the annular groove 33, the bore diameter of the annular hoop 34 is larger than the bottom diameter of the annular groove 33 when the expansion pipe 3 is expanded to the maximum extent, the bore diameter of the annular hoop 34 is smaller than the outer diameter when the expansion pipe 3 is expanded to the minimum extent, and the outer diameter of the annular hoop 34 is smaller than the inner diameter of the explosion hole 7; the cross section of the annular groove 33 is U-shaped, and the cross section of the annular hoop 34 is rectangular, so that the annular hoop 34 is clamped in the annular groove 33, each expansion piece 31 of the expansion pipe 3 can keep synchronous and integral movement with the expansion pipe 3 when the expansion body 4 moves from two ends to the middle, the condition of dislocation of up-and-down movement cannot be generated, the expansion effect is better, and the extrusion expansion sleeve 2 generates better tightness.
Preferably, the expansion sleeve 2 is divided into an upper part and a lower part, and the annular hoop 34 completely separates the upper part and the lower part of the expansion sleeve 2; the part of the annular hoop 34 extending out of the annular groove 33 divides the expansion sleeve 2 into an upper part and a lower part, so that the upper part and the lower part of the expansion sleeve 2 can be uniformly stressed without being extruded to one end to cause the condition that one end is tight and one section is loose.
Preferably, the expansion body 4 is connected with the upper cylinder 5 and the lower cylinder 6 by rolling welding.
Preferably, the outer cone 42 and the inner cone 32 are both finished surfaces; the finish surface ensures the stability and continuity of the relative movement of the outer cone 42 and the inner cone 32, thus providing better radial force on the expansion pipe 3 and the expansion shell 2.
Preferably, the expansion pipe 3 is formed by circumferentially splicing six expansion sheets 31.
The beneficial effects of the invention are as follows:
the invention drives the expansion body to prop up the expansion sleeve to seal the gap between the high-voltage electromagnetic force explosion device and the explosion hole through the expansion pipe with the threads with opposite rotation directions, and adopts the cylindrical expansion pipe formed by splicing the multi-tile expansion sheets to extrude the expansion sleeve, and the sealing sleeve can provide sealing strength and sealing effect for sealing the gap between the high-voltage electromagnetic force explosion device and the explosion hole through the combination of rigid materials and elastic materials, so that the sealing sleeve has good sealing performance and high sealing strength, and is suitable for instant explosion impact force generated by electromagnetic force explosion.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front cross-sectional view of an expansion seal cartridge of a high-pressure electro-magnetic blasting apparatus of the present invention prior to sealing;
FIG. 2 is a front cross-sectional view of the present invention after sealing;
FIG. 3 is a schematic perspective view of the present invention;
FIG. 4 is an enlarged schematic view of part of A of FIG. 1;
FIG. 5 is an enlarged schematic view of part B of FIG. 1;
FIG. 6 is an enlarged schematic view of part of C of FIG. 2;
FIG. 7 is an enlarged schematic view of part of D of FIG. 1;
fig. 8 is a schematic perspective view of an expansion vessel.
In the figure, 1, an expansion shaft; 2. an expansion sleeve; 3. an expansion tube; 4. an expansion body; 5. a cylinder is arranged; 6. a lower cylinder; 7. a blast hole; 8. an axial expansion ring; 9. a radial expansion ring; 11. an external thread; 21. a horn mouth; 31. An expansion sheet; 32. an inner conical surface; 33. an annular groove; 34. an annular collar; 41. an internal thread; 42. an outer conical surface; 43. a baffle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the embodiments of the present invention will be understood by those of ordinary skill in the art according to specific circumstances.
The embodiment of the invention provides an expansion sealing sleeve of a high-voltage electromagnetic blasting device, which comprises an expansion shaft 1, an expansion sleeve 2, an expansion pipe 3 and an expansion body 4, wherein the expansion shaft 1 is of a cylindrical shape with hollow inside, external threads 11 with opposite rotation directions are respectively arranged on the outer circumferences of two ends of the expansion shaft 1, the expansion sleeve 2 is of a cylindrical shape made of elastic sealing materials, the expansion pipe 3 is of a cylindrical shape formed by splicing tile-shaped expansion sheets 31 with the same shape and the same size, two ends of the inner cylinder of the expansion pipe 3 are respectively provided with an inner conical surface 32 which is gradually decreased inwards along the axial direction, the inner conical surfaces 32 are respectively provided with the same rotation axis as the expansion pipe 3, the expansion body 4 is provided with two conical tables, the conical tables of the expansion body 4 are axially provided with through holes, the conical tables and the through holes of the expansion body 4 are respectively provided with the same rotation axis as the expansion body 4, the through holes of the expansion body 4 are internally provided with internal threads 41, the internal threads 41 are matched with the external threads 11, and the external conical surfaces 42 of the expansion body 4 are the conical surfaces are the same as the conical surfaces 32; the through hole of the expansion body 4 is connected with two ends of the expansion shaft 1 in a threaded manner, the expansion pipe 3 is sleeved outside the expansion shaft 1, the expansion sleeve 2 is wrapped outside the expansion pipe 3, and the expansion body 4 is respectively connected with the upper cylinder 5 and the lower cylinder 6 of the high-voltage electromagnetic blasting device; when the expansion seal is used, the expansion shaft 1 is rotated to drive the expansion body 4 to move from two ends to the middle along the axial direction, so that the expansion pipe 3 is expanded to extrude the expansion sleeve 2 to seal a gap between the piezoelectric magnetic force blasting device and the blasting hole 7.
Further, the conical bottom of the expansion body 4 is provided with an annular baffle plate 43, the baffle plate 43 and the expansion body 4 rotate together, an axial expansion ring 8 is arranged between the baffle plate 43 and the end face of the expansion sleeve 2, and the axial expansion ring 8 is made of elastic materials; the axial expansion ring 8 keeps the end face of the expansion sleeve 2 to be synchronously pushed by the axial force exerted by the baffle plate 43 when the expansion body 4 moves towards the middle, so that the expansion sleeve 2 is ensured not to be extruded towards two ends when being extruded by the expansion pipe 3, and the sealing effect of the expansion sleeve 2 on a gap between the high-voltage electromagnetic blasting device and the blasting hole 7 in the radial direction is ensured, and therefore, the hardness of an elastic material of the axial expansion ring 8 is greater than that of the expansion sleeve 2.
Further, the inner hole of the axial expansion ring 8 is conical and the taper is the same as the outer conical surface 42; the taper of the inner hole of the axial expansion ring 8 ensures that the axial expansion ring 8 and the outer conical surface 42 of the expansion body 4 keep self-deformation during the co-extrusion movement, so that the end surface of the axial expansion ring 8 keeps a pushing plane smooth during the pushing of the end surface of the expansion sleeve 2, and good pushing effect is ensured.
Furthermore, the orifices at the two ends of the cylinder of the expansion sleeve 2 are provided with cone-shaped flare openings 21, the taper of the flare openings 21 is the same as that of the outer cone 42, a radial expansion ring 9 is arranged between the flare openings 21 and the outer cone 42, and the radial expansion ring 9 is made of elastic materials; the radial expansion ring 9 pushes the two ends of the expansion sleeve 2 radially outwards while the expansion body 4 moves axially relative to the expansion pipe 3, so that the two ends of the expansion sleeve 2 cannot be weakened in sealing effect due to the edge of the expansion pipe 3, and therefore the hardness of the elastic material of the radial expansion ring 9 is greater than that of the expansion sleeve 2.
Further, the inner hole surface and the outer circumferential surface of the radial expansion ring 9 are both conical and have the same taper as the outer conical surface 42; the taper of the inner hole surface and the outer circumferential surface of the radial expansion ring 9 ensures that the radial expansion ring 9 keeps self-deformation when the outer conical surface 42 of the expansion body 4 is extruded, and gives better radial pushing effect to the two ends of the expansion sleeve 2.
Further, an annular groove 33 is formed in the outer circumference of the expansion pipe 3, an annular hoop 34 is arranged in the annular groove 33, the bore diameter of the annular hoop 34 is larger than the bottom diameter of the annular groove 33 when the expansion pipe 3 is expanded to the maximum extent, the bore diameter of the annular hoop 34 is smaller than the outer diameter of the expansion pipe 3 when the expansion pipe 3 is expanded to the minimum extent, and the outer diameter of the annular hoop 34 is smaller than the inner diameter of the explosion hole 7; the cross section of the annular groove 33 is U-shaped, and the cross section of the annular hoop 34 is rectangular, so that the annular hoop 34 is clamped in the annular groove 33, each expansion piece 31 of the expansion pipe 3 can keep synchronous and integral movement with the expansion pipe 3 when the expansion body 4 moves from two ends to the middle, the condition of dislocation of up-and-down movement cannot be generated, the expansion effect is better, and the extrusion expansion sleeve 2 generates better tightness.
Further, the expansion sleeve 2 is divided into an upper part and a lower part, and the annular hoop 34 completely separates the upper part and the lower part of the expansion sleeve 2; the part of the annular hoop 34 extending out of the annular groove 33 divides the expansion sleeve 2 into an upper part and a lower part, so that the upper part and the lower part of the expansion sleeve 2 can be uniformly stressed without being extruded to one end to cause the condition that one end is tight and one section is loose.
Further, the connection mode of the expansion body 4, the upper cylinder 5 and the lower cylinder 6 is rolling welding.
Further, the outer cone 42 and the inner cone 32 are both finish surfaces; the finish surface ensures the stability and continuity of the relative movement of the outer cone 42 and the inner cone 32, thus providing better radial force on the expansion pipe 3 and the expansion shell 2.
Further, the expansion pipe 3 is formed by circumferentially splicing six expansion sheets 31.
Examples
When in actual use, firstly, the blasting device is placed in the blasthole 7, so that the blasted part at the lower part of the sealing sleeve 2 reaches the preset blastposition, then blasting media are placed in the blastposition through the hollow hole in the expansion shaft 1, or the blasted media are preset at the blasted part at the lower part of the sealing sleeve 2 in advance, and at the moment, only the power line is needed to be connected into the blasting media through the hollow hole in the expansion shaft 1. Then, the expansion shaft 1 is rotated, and as the outer circumferences of the two ends of the expansion shaft 1 are respectively provided with external threads 11 with opposite rotation directions, the external threads 11 respectively drive the expansion bodies 4 at the two ends to move from the two ends to the middle along the axial direction so as to further expand the expansion pipe 3; in the process of expanding, the annular hoop 34 is clamped in the annular groove 33, so that each expansion sheet 31 of the expansion pipe 3 can keep synchronous and integral movement with the expansion pipe 3 when the expansion body 4 moves from two ends to the middle, and the condition of dislocation of up-and-down movement is avoided; the axial expansion ring 8 and the radial expansion ring 9 apply pushing force to the two ends of the expansion sleeve 2 from the axial direction and the radial direction at the two ends at the same time, and the expansion pipe 3 applies radial extrusion to the expansion sleeve 2 in the middle; meanwhile, the part of the annular hoop 34 extending out of the annular groove 33 divides the expansion sleeve 2 into an upper part and a lower part, so that the upper part and the lower part of the expansion sleeve 2 can be uniformly stressed without being extruded to one end to cause the condition that one end is tight and one section is loose. Therefore, the expansion sleeve 2 uniformly receives the radial outward thrust in the whole length direction and the axial inward thrust at the two ends, so that the expansion sleeve 2 is ensured to be uniformly stressed in the whole expansion process, and a good sealing effect is further ensured. Meanwhile, due to the arrangement of the extrusion and the screw angle friction of the external screw thread 11 to the internal screw thread 41 and the extrusion and the taper angle of the external conical surface 42 and the internal conical surface 32, the thrust force to the expansion sleeve 2 is generated and maintained by each expansion sheet 31 of the whole expansion pipe 3, and the sealing strength is further ensured.
In summary, according to the expansion sealing sleeve of the high-voltage electromagnetic blasting device, the expansion sleeve is driven by the expansion pipe with the threads with opposite rotation directions to drive the expansion body to expand the expansion sleeve to seal the gap between the high-voltage electromagnetic blasting device and the blasting hole, the cylindrical expansion pipe formed by splicing the plurality of tile-shaped expansion pieces is adopted to extrude the expansion sleeve, and the sealing sleeve can provide sealing strength and sealing effect for sealing the gap between the high-voltage electromagnetic blasting device and the blasting hole through the joint of the rigid material and the elastic material, so that the expansion sealing sleeve can meet blasting requirements, and has wide application prospects.
In this specification, each embodiment is described in a progressive manner, and the same or similar parts of each embodiment are referred to each other, and each embodiment is mainly described as a difference from other embodiments.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the present invention; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The expansion sealing sleeve of the high-pressure electromagnetic blasting device is characterized by comprising an expansion shaft (1), an expansion sleeve (2), an expansion pipe (3) and an expansion body (4), wherein the expansion shaft (1) is of a cylindrical shape with hollow inside, external threads (11) with opposite rotation directions are respectively arranged on the outer circumferences of two ends of the expansion shaft (1), the expansion sleeve (2) is of a cylindrical shape made of elastic sealing materials, the expansion pipe (3) is of a cylindrical shape formed by splicing tile-shaped expansion sheets (31) with the same shape and the same size, two ends of the inner cylinder of the expansion pipe (3) are respectively provided with an inner conical surface (32) which is gradually decreased inwards along the axial direction, the inner conical surfaces (32) and the expansion pipe (3) are coaxial, the expansion body (4) is provided with two conical tables, the conical tables of the expansion body (4) are axially provided with through holes, the conical tables and the through holes of the expansion body (4) are respectively coaxial with the rotary shafts, the through holes of the expansion body (4) are internally provided with internal threads (41), and the conical surfaces (41) of the internal conical surfaces (41) are matched with the conical surfaces (42) of the external conical surfaces (11);
the through hole of the expansion body (4) is connected with two ends of the expansion shaft (1) in a threaded manner, the expansion pipe (3) is sleeved outside the expansion shaft (1), the expansion sleeve (2) is wrapped outside the expansion pipe (3), and the expansion body (4) is respectively connected with an upper cylinder (5) and a lower cylinder (6) of the piezoelectric magnetic force blasting device; when in expansion sealing use, the expansion shaft (1) is rotated to drive the expansion body (4) to move from two ends to the middle along the axial direction so as to prop up the expansion pipe (3) to extrude the expansion sleeve (2) to seal the gap between the piezoelectric magnetic force blasting device and the blasting hole (7);
the orifice at the two ends of the cylinder of the expansion sleeve (2) is provided with a conical flare (21), the taper of the flare (21) is the same as that of the outer conical surface (42), a radial expansion ring (9) is further arranged between the flare (21) and the outer conical surface (42), and the radial expansion ring (9) is made of an elastic material.
2. An expansion sealing sleeve of a high-voltage electromagnetic blasting device according to claim 1, wherein the conical bottom of the expansion body (4) is provided with an annular baffle (43), the baffle (43) and the expansion body (4) are coaxial, an axial expansion ring (8) is further arranged between the baffle (43) and the end face of the expansion sleeve (2), and the axial expansion ring (8) is made of an elastic material.
3. Expansion seal cartridge of a high-pressure electromagnetic blasting apparatus according to claim 2, wherein the inner bore of the axial expansion ring (8) is conical and has the same conicity as the outer conical surface (42).
4. Expansion seal sleeve of a high-pressure electromagnetic blasting device according to claim 1, wherein the inner and outer circumferential surfaces of the radial expansion ring (9) are conical and the same taper as the outer conical surface (42).
5. An expansion sealing sleeve of a high-voltage electromagnetic blasting device according to claim 1, wherein an annular groove (33) is arranged on the outer circumference of the expansion tube (3), an annular hoop (34) is arranged in the annular groove (33), the bore diameter of the annular hoop (34) is larger than the bottom diameter of the annular groove (33) when the expansion tube (3) is expanded to the maximum extent, the bore diameter of the annular hoop (34) is smaller than the outer diameter when the expansion tube (3) is expanded to the minimum extent, and the outer diameter of the annular hoop (34) is smaller than the inner diameter of the blasting hole (7).
6. An expansion sealing sleeve for a high-pressure electromagnetic blasting machine according to claim 5, wherein the expansion sleeve (2) is divided into an upper part and a lower part, and the annular collar (34) completely separates the upper part and the lower part of the expansion sleeve (2).
7. Expansion sealing sleeve of a high-voltage electromagnetic blasting device according to claim 1, wherein the expansion body (4) is connected with the upper cylinder (5) and the lower cylinder (6) by roll welding.
8. An expansion seal cartridge for a high pressure electromagnetic blasting apparatus according to claim 1, wherein the outer tapered surface (42) and the inner tapered surface (32) are both finished surfaces.
9. An expansion sealing sleeve of a high-voltage electromagnetic blasting device according to claim 1, wherein the expansion pipe (3) is formed by splicing six expansion pieces (31) circumferentially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110229408.6A CN112902776B (en) | 2021-03-02 | 2021-03-02 | Expansion sealing sleeve of high-voltage electromagnetic blasting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110229408.6A CN112902776B (en) | 2021-03-02 | 2021-03-02 | Expansion sealing sleeve of high-voltage electromagnetic blasting device |
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| Publication Number | Publication Date |
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| CN112902776A CN112902776A (en) | 2021-06-04 |
| CN112902776B true CN112902776B (en) | 2023-11-28 |
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| AUPR582001A0 (en) * | 2001-06-20 | 2001-07-12 | Banjura Pty Ltd | Protection of blast holes |
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| WO2009109008A1 (en) * | 2008-03-04 | 2009-09-11 | Trouperdale Pty Ltd | Borehole plug with a primary bladder inflation device and a pressure booster |
| CN205423444U (en) * | 2014-10-20 | 2016-08-03 | 安科拉钱姆博德公司 | Machinery of being applied to metal structure of mounting that expands |
| CN109416067A (en) * | 2016-06-29 | 2019-03-01 | 费希尔厂有限责任两合公司 | Tightening member |
| CN206190285U (en) * | 2016-11-24 | 2017-05-24 | 曾庆平 | Hole packer for carbon dioxide blast tube |
| CN207212871U (en) * | 2017-08-17 | 2018-04-10 | 淄博市技师学院 | A kind of prefastening setscrew |
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