Adjustable charging device for mine presplitting blasting

Abstract

The utility model relates to the technical field of geotechnical engineering blasting, and provides an adjustable charging device for mine presplitting blasting, which comprises a central rod, a lead groove parallel to the axial direction, and a detonating cord used for accommodating and connecting an explosive bag, the multiple clamping strips are sequentially arranged on the outer side of the center rod in the direction parallel to the axial direction of the center rod at equal intervals in an array mode, and the clamping strips are located on one side of the groove; the positioning pipe is rotationally and slidably arranged on the outer side of the center rod in a sleeving mode, a clamping groove matched with the clamping strip in a clamped mode is formed in the positioning pipe, and after the positioning pipe rotates, the clamping groove is connected with or disconnected from the clamping strip in a clamped mode; and the positioning disc is arranged on the outer side of the positioning pipe in a sleeving mode and used for supporting the explosive bag arranged on the outer side of the positioning pipe in a sleeving mode. By means of the technical scheme, the problems that in the prior art, installation is inconvenient, and the explosive package is difficult to accurately position under the gravity effect are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rock and soil engineering blasting, in particular to an adjustable charge device for mine pre-splitting blasting. Background Art

[0002] During the blasting construction of open-pit mines, pre-splitting blasting control technology is usually used to meet the requirements for forming the high and steep slopes near the boundary. The basic process is: before blasting in the main blasting area, a crack is first blasted along the contour line of the final slope to buffer and reflect the vibration waves generated by the blasting in the main blasting area, thereby reducing the destructive effect of the blasting in the main blasting area on the retained rock mass to improve the stability of the slope.

[0003] Due to the special charging structure of pre-splitting blasting, the traditional charging method mostly adopts manual charging, specifically, long bamboo poles are cut into long strips at the construction site, and the explosive rolls are tied to the bamboo strips in sections as required, and the detonating cord is tied close to the explosives to detonate the explosives. Based on the problems of low charging efficiency, high construction cost, and non-standard charging in manual charging of pre-splitting blasting, the bamboo strips are flexible, and the rolls are difficult to maintain accurate positioning under the action of gravity, resulting in deviation, which affects the blasting effect.

[0004] The published patent document (CN 209639625 U, a device for positioning charge in pre-splitting oblique blastholes) adopts guide grooves and rubber wheels to achieve center positioning, and uses sealing plates to seal the explosives in a circular ring structure so that its position is relatively centered. However, there are already well-sealed annular explosive package structures that can be used directly without on-site production. The original structure is not suitable for the positioning and installation of the annular explosive package structure, and the installation is inconvenient. In addition, it is easy to cause the problem that the explosive package is difficult to accurately position under the action of gravity. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an adjustable charging device for mine pre-splitting blasting in view of the above-mentioned technical deficiencies, which solves the problems of inconvenient installation and difficulty in accurately positioning the explosive package under the action of gravity.

[0006] The technical solution adopted by the utility model is: to provide an adjustable charging device for pre-splitting blasting in a mine, which is used to fill explosive packs into blast holes at intervals, including:

[0007] A center rod having a wire groove parallel to the axial direction for accommodating a detonating cord connected to an explosive pack;

[0008] There are a plurality of positioning bars, which are arranged in an array at equal intervals on the outside of the central rod in a direction parallel to the axial direction of the central rod, and the positioning bars are located on one side of the groove;

[0009] A positioning tube is rotatably and slidably sleeved on the outside of the central rod, and a clamping groove is provided inside the positioning tube to be clamped with the clamping strip. After the positioning tube is rotated, the clamping groove is clamped or disengaged with the clamping strip;

[0010] The positioning plate is sleeved on the outside of the positioning tube and is used to support the explosive package sleeved on the outside of the positioning tube.

[0011] To further optimize the technical solution, the side wall of the positioning tube has a wire groove, the wire groove is located opposite to the wire groove, and is used to pass the detonating cord.

[0012] Further optimization of this technical solution also includes:

[0013] The two sealing covers are provided with two, and the two sealing covers are arranged opposite to each other and, after being connected, form a ring shape surrounding the outside of the central rod. The two sealing covers are respectively clamped and arranged on the upper end of the positioning tube to block the upper side of the positioning tube.

[0014] Further optimization of this technical solution also includes:

[0015] There are several wire shielding plates, which are clamped with the wire groove and are used to shield the wire groove.

[0016] To further optimize the technical solution, there are at least two positioning grooves, which are arranged parallel to the axial direction of the center rod, and the two positioning grooves are respectively engaged with two adjacent positioning strips; one end of the center rod has a connecting groove, and the other end has a connecting column corresponding to the connecting groove.

[0017] To further optimize the technical solution, the positioning plate has a plurality of clamping blocks on the circumferential side surface; and a material leakage groove is provided between every two adjacent clamping blocks.

[0018] Further optimization of this technical solution also includes:

[0019] There are several elastic sleeves, which are clamped on the clamping block and used to abut against the inner wall of the blast hole.

[0020] To further optimize the technical solution, the upper end of the cover is provided with a baffle, the baffle is adapted to the shape of the outer side of the wire shielding plate, the lower end of the wire shielding plate is in contact with the upper end of the cover, and the baffle is attached to the outer side of the wire shielding plate.

[0021] The beneficial effects of the utility model are:

[0022] 1. The explosive pack can be annular or arc-shaped, and fits on the periphery of the positioning tube and is located on the positioning plate. The positioning tube is positioned at a high interval by the engagement of the engagement slot and the engagement strip. There can be multiple positioning tubes, which are distributed at intervals along the axial direction, that is, the explosive packs are arranged at intervals. The engagement strip is located on one side of the conductor groove. When the engagement slot is engaged with the engagement strip, the positioning tube is positioned on the center rod. The engagement slot and the engagement strip are disengaged by rotating the positioning tube. At this time, the positioning tube can slide along the center rod to adjust the position and achieve the interval positioning of the explosive pack. After the position adjustment is completed, the positioning rod is rotated to engage the engagement slot with the corresponding engagement strip. The position adjustment of the positioning tube is convenient and quick, and the equal-spaced engagement strips can achieve the effect of distance measurement without the need for additional tools such as rulers.

[0023] 2. The wire groove is close to the center position, and the detonating cord of the explosive package is placed in the wire groove, that is, the detonating cord of the explosive package is located on the inner side of the annular explosive package, and the wire groove can play a certain protective role for the detonating cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the coordination structure between the positioning tube and the center rod;

[0026] Figure 3 for Figure 1 A schematic diagram of a top view structure;

[0027] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0028] Figure 5 for Figure 4 The schematic diagram of the local enlarged structure at position I in the middle;

[0029] Figure 6 for Figure 4 A schematic diagram of a partially enlarged structure in the cross-section along the middle BB direction;

[0030] Figure 7 This is a schematic diagram of the positioning tube and positioning plate structure of the utility model;

[0031] Figure 8 for Figure 7 A schematic cross-sectional structure diagram of;

[0032] Fig. 9 It is a schematic diagram of the butt-jointed extension structure of two center rods of the utility model;

[0033] Fig.10 for Fig. 9 An enlarged schematic diagram of a cross-sectional structural portion;

[0034] Explanation of the markings in the figure: 1. Center rod; 101. Wire groove; 102. Connecting groove; 103. Connecting column; 2. Positioning strip; 3. Positioning tube; 301. Protrusion; 3011. Positioning groove; 302. Wire passage groove; 4. Positioning plate; 401. Connecting block; 402. Leakage groove; 5. Explosive bag; 501. Detonating cord; 6. Cover; 601. Baffle; 7. Wire shielding plate; 701. Baffle; 702. Positioning plate; 8. Elastic sleeve. DETAILED DESCRIPTION

[0035] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0037] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0038] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] like Figure 1-10 As shown, a mine pre-splitting blasting adjustable charging device includes a center rod 1, which has a wire groove 101 parallel to the axial direction, for accommodating a detonating cord 501 connected to an explosive pack 5; a plurality of retaining bars 2, which are arranged in an array at equal intervals on the outside of the center rod 1 in a direction parallel to the axial direction of the center rod 1, and the retaining bars 2 are located on one side of the groove; a positioning tube 3, which is rotatably and slidably sleeved on the outside of the center rod 1, and the positioning tube 3 has a retaining groove 3011 inside which is engaged with the retaining bar 2, and after the positioning tube 3 is rotated, the retaining groove 3011 is engaged with or disengaged from the retaining bar 2; a positioning plate 4, which is sleeved on the outside of the positioning tube 3, for supporting the explosive pack 5 sleeved on the outside of the positioning tube 3.

[0040] When in use, there can be multiple positioning tubes 3, which are spaced in sequence along the axial direction, and the explosive packs 5 are arranged on the positioning tubes 3, that is, the explosive packs 5 are arranged at intervals according to the blasting needs. The clamping strip 2 is located on one side of the wire groove 101. When the clamping groove 3011 is clamped with the clamping strip 2, the positioning tube 3 is positioned on the center rod 1. The positioning tube 3 is rotated, and the clamping groove 3011 is disengaged from the clamping strip 2. At this time, the positioning tube 3 can slide freely and quickly along the center rod 1 to adjust the position and realize the interval adjustment of the explosive packs 5. After the position adjustment is completed, the positioning rod is rotated to make the clamping groove 3011 clamped with the corresponding clamping strip 2. The center rod 1 can be a cylindrical structure, with the front and rear sides cut into planes, the wire groove 101 is set on the plane of the front side, the positioning strip 2 can be an arc structure, set on the left or right side of the center rod 1, and the positioning strip 2 can be set on both sides of the left and right sides, so that the positioning is more stable. Similarly, the positioning tube 3 has positioning grooves 3011 corresponding to the positioning strips 2 on both sides of the interior, so that the positioning grooves 3011 and the positioning strips 2 can be better observed from the outside. When the positioning grooves 3011 and a positioning strip 2 are opposite, the lower end of the positioning tube 3 is in the same plane as the upper end face of another positioning strip 2. The positioning plate 4 can carry and support the explosive package 5, and the diameter of the positioning plate 4 is slightly smaller than the blast hole, which can play a central positioning role, so that the explosive package 5 is roughly located at the center of the blast hole. The positioning tube 3 and the positioning plate 4 thereon are components installed on the center rod 1, and positioning plates 4 of various diameters can be set according to different blast hole diameters. The internal locking groove 3011 on the positioning tube 3 can be located on the protrusion 301 inside the positioning tube 3. The protrusion 301 and the center rod 1 body are rotationally fitted, and sliding can be achieved after the locking groove 3011 and the locking strip 2 are released.

[0041] like Figure 8 As shown, the positioning groove 3011 on the positioning tube 3 can penetrate the side wall of the positioning tube 3, which is convenient for production and manufacturing, and can also be observed whether it is aligned with the positioning strip 2. In the figure, the detonating cord 501 is only for the convenience of position display and does not represent the actual length.

[0042] Furthermore, the side wall of the positioning tube 3 has a wire groove 302 , which is located opposite to the wire groove 101 and is used for passing the detonating cord 501 .

[0043] When in use, a vertical wire groove 302 is provided on the positioning tube 3 and is connected to the wire groove 101, so that the detonating cord 501 of the explosive pack 5 on the positioning tube 3 can pass through the wire groove 302 and enter the wire groove 101, thereby reducing the exposure of the detonating cord 501, reducing the bending stress of the detonating cord 501, and improving the protection of the detonating cord 501.

[0044] Furthermore, there are two covers 6 , which are arranged opposite to each other and form a ring shape around the outside of the central rod 1 after docking. The two covers 6 are respectively clamped and arranged on the upper end of the positioning tube 3 to block the upper side of the positioning tube 3 .

[0045] When in use, the cover 6 is semi-circular, and the two covers 6 are connected to form an annular embracing structure. The two covers 6 are respectively inserted into the upper end of the positioning tube 3 from both sides. There is an annular gap between the upper end of the positioning tube 3 and the center rod 1, and the shape of the cover 6 can be adapted thereto and inserted into the annular gap to achieve plug-in positioning and block the opening at the upper end of the positioning tube 3. At the same time, the cover 6 covers or partially covers the upper end of the explosive package 5, which can protect the explosive package 5, especially the detonating cord 501. During the backfilling process, the backfill material can be reduced to damage the detonating cord 501.

[0046] Furthermore, it also includes: a plurality of wire shielding plates 7 , which are snap-connected with the wire groove 101 to shield the wire groove 101 .

[0047] When in use, the wire shielding plate 7 is used to shield the wire groove 101 not covered by the positioning tube 3 to protect the detonating cord 501 inside. For example, after two positioning tubes 3 are arranged on the central rod 1, two sections of wire shielding plates 7 can be used to cover and protect the exposed wire groove 101 containing the detonating cord 501. One wire shielding plate 7 is located between the two positioning tubes 3, with the lower end abutting against the lower cover 6, and the upper end part deeply penetrates into the upper positioning tube 3. When backfilling, the filling material is filled from top to bottom, and the backfill material entering the positioning tube 3 from below will not cause damage to the explosive bag 5 and the detonating cord 501. The wire shielding plate 7 may include a baffle 701 and two positioning plates 702, the two positioning plates 702 are arranged at intervals, and the two positioning plates 702 are inserted into the wire groove 101 to form a positioning effect. At the same time, the wire shielding plate 7 partially enters the positioning tube 3, which also produces a positioning effect. There is still an exposed wire groove 101 between the upper positioning tube 3 and the upper end of the center rod 1, and a wire shielding plate 7 is inserted into the wire groove 101 for shielding. The wire shielding plate 7 can be produced by extrusion to produce a longer section of material, and can be cut and used according to the actual length requirements such as the spacing of the positioning tube 3, so that it is more flexible to use and install.

[0048] Furthermore, there are at least two positioning grooves 3011, which are arranged parallel to the axial direction of the center rod 1. The two positioning grooves 3011 are respectively engaged with two adjacent positioning strips 2; one end of the center rod 1 has a connecting groove 102, and the other end has a connecting column 103 corresponding to the connecting groove 102.

[0049] When using, Figure 9-10As shown, in order to adapt to different blasthole depths, the center rod 1 can be extended along the axial direction, and the two butted center rods 1 can be locked and connected by the positioning tube 3. When extended, the two center rods 1 are butted up and down, and two connecting columns 103 and connecting grooves 102 are respectively provided, and the two center rods 1 are plugged and connected in a one-to-one correspondence, which can prevent the two center rods 1 from rotating relative to each other. Then, the two center rods 1 can be connected and locked by the positioning tube 3. After the two center rods 1 are butted, all the clamping strips 2 are still distributed at equal intervals. The positioning tube 3 has at least two clamping grooves 3011 inside, and the two adjacent clamping strips 2 of the two center rods 1 can be clamped and connected by the positioning tube 3, that is, the upper and lower center rods 1 are tightly butted together. In the figure, the positioning tube 3 has a structure with three clamping grooves 3011, and the butt connection is more stable. The positioning tube 3 used for butt connection can be provided with explosive packs 5, or it can be used only as a connection, and can be used according to the requirements of the interval layout of the explosive packs 5.

[0050] The positioning tube 3 is positioned or the two center rods 1 are connected and extended by utilizing the clamping structure of the clamping strip 2 and the clamping groove 3011, without the need for other positioning or connecting tools. The structure is simple, no other tools need to be carried, and the operation is convenient.

[0051] The spacing distance of the positioning strips 2 can be set according to the multiple of the spacing distance required for the interval arrangement of the explosive packs 5. The cover 6 is preferably pressed on the upper end of the explosive pack 5, that is, the distance between the positioning plate 4 and the upper end of the positioning tube 3 is close to the thickness of the explosive pack 5, which can better position the explosive pack 5 and cover and protect the explosive pack 5 and the detonating cord 501. Those skilled in the art can coordinate and adapt between the existing parameters. Soft rubber can be set at the lower end of the cover 6 to better flexibly press the explosive pack 5 and play the role of adapting the explosive pack 5. The thickness and structure of the cover 6 can be adapted to different explosive packs 5.

[0052] Furthermore, the positioning plate 4 has a plurality of clamping blocks 401 on the circumferential side thereof; and a material leakage groove 402 is provided between every two adjacent clamping blocks 401 .

[0053] When in use, the snap-in blocks 401 distributed along the annular sides of the positioning plate 4 can be used for roughly positioning in the radial direction. At the same time, the existence of the leakage groove 402 ensures the upper and lower connections, making backfilling faster.

[0054] Furthermore, it also includes: elastic sleeves 8, which are in plurality, and the elastic sleeves 8 are clamped on the clamping block 401, and the elastic sleeves 8 are used to abut against the inner wall of the blast hole.

[0055] When in use, the elastic sleeve 8 is clamped on the clamping block 401, and the connection is stable. Several elastic sleeves 8 can be provided, and it is best to have three or more evenly spaced along the circumference. The elastic sleeve 8 abuts against the inner wall of the blast hole. The elastic sleeve 8 itself has a certain deformation compression amount, which is conducive to making the center rod 1 closer to the center position in the blast hole. The elastic sleeve 8 has a simple structure, low cost, and is easy to install.

[0056] Furthermore, the upper end of the cover 6 has a baffle 601 , which is adapted to the shape of the outer side of the wire shielding plate 7 , the lower end of the wire shielding plate 7 abuts against the upper end of the cover 6 , and the baffle 601 is attached to the outer side of the wire shielding plate 7 .

[0057] When in use, the end of the wire shielding plate 7 abuts against the upper end of the cover 6 to better achieve docking and shielding. The baffle 601 fits on the outside of the wire shielding plate 7, and a plug-in space is formed between the baffle 601 and the center rod 1. The end of the wire shielding plate 7 is plugged into this plug-in space, which better positions the wire shielding plate 7, makes docking and shielding more stable, and better protects the detonating cord 501 in the wire groove 101. During installation, the end of the wire shielding plate 7 can be first inserted into the lower part of the positioning tube 3, and then slidably abuts on the cover 6 below.

[0058] When assembling the positioning device, the positioning tube 3, the explosive pack 5 and the cover 6 are installed in sequence. After repeating the above installation, the detonating cord 501 is all in the wire groove 101, and finally the wire shielding plate 7 is installed.

[0059] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A mine pre-splitting blasting adjustable charging device, used for filling explosive packs (5) into blast holes at intervals, characterized in that: include: The center rod (1) has a wire groove (101) parallel to the axial direction and is used to accommodate a detonating cord (501) connected to an explosive package (5); A plurality of positioning strips (2), wherein the plurality of positioning strips (2) are arranged in an array at equal intervals on the outside of the central rod (1) in a direction parallel to the axial direction of the central rod (1), and the positioning strips (2) are located on one side of the groove; The positioning tube (3) is rotatably and slidably sleeved on the outside of the central rod (1), and the positioning tube (3) has a locking groove (3011) inside thereof that is engaged with the locking strip (2). After the positioning tube (3) is rotated, the locking groove (3011) is engaged with or disengaged from the locking strip (2); The positioning plate (4) is sleeved on the outside of the positioning tube (3) and is used to support the explosive package (5) sleeved on the outside of the positioning tube (3).

2. The mine pre-splitting blasting adjustable charge device according to claim 1 is characterized in that: The side wall of the positioning tube (3) is provided with a wire-passing groove (302), and the wire-passing groove (302) is located opposite to the wire groove (101) and is used for passing the detonating cord (501).

3. The mine pre-splitting blasting adjustable charge device according to claim 2 is characterized in that: Also includes: The two sealing covers (6) are arranged opposite to each other and, after being connected, form a ring shape surrounding the outside of the central rod (1). The two sealing covers (6) are respectively clamped and arranged on the upper end of the positioning tube (3) to seal the upper side of the positioning tube (3).

4. The mine pre-splitting blasting adjustable charge device according to claim 3, characterized in that: Also includes: There are a plurality of wire shielding plates (7), and the wire shielding plates (7) are arranged to be snap-connected with the wire groove (101) to shield the wire groove (101).

5. The mine pre-splitting blasting adjustable charge device according to claim 2, characterized in that: There are at least two of the locking grooves (3011), which are arranged parallel to the axial direction of the central rod (1), and the two locking grooves (3011) are respectively engaged with two adjacent locking strips (2); one end of the central rod (1) has a connecting groove (102), and the other end has a connecting column (103) that is plugged into the connecting groove (102) and corresponds to it.

6. The mine pre-splitting blasting adjustable charge device according to claim 1, characterized in that: The positioning plate (4) has a plurality of clamping blocks (401) on the circumferential side surface; a material leakage groove (402) is provided between every two adjacent clamping blocks (401).

7. The mine pre-splitting blasting adjustable charge device according to claim 6, characterized in that: Also includes: There are a plurality of elastic sleeves (8), the elastic sleeves (8) being clamped on the clamping block (401), and the elastic sleeves (8) being used to abut against the inner wall of the blast hole.

8. The mine pre-splitting blasting adjustable charge device according to claim 4, characterized in that: The upper end of the cover (6) has a baffle (601), the baffle (601) is adapted to the shape of the outer side of the wire shielding plate (7), the lower end of the wire shielding plate (7) is in contact with the upper end of the cover (6), and the baffle (601) is attached to the outer side of the wire shielding plate (7).

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