Explosive tube structure with uncoupled explosive charges

Abstract

A detonating tube structure with uncoupled explosive charges, comprising a cannon tube (1) with a semicircular cross-section, characterized in that a separating plate (2) is slidably connected to the inner side wall of the cannon tube (1), the separating plate (2) being provided with a cannon hole (26) for inserting a detonating cord (6); a sliding rail (11) is rigidly connected to the inner side wall of the cannon tube (1), and the separating plate (2) is provided with a sliding groove that fits the sliding rail (11); a positioning pin (21) is inserted into the separating plate (2), and the sliding rail (11) is provided with a positioning hole that fits the positioning pin (21).

Description

Technical field

[0001] The present utility model relates to the technical field of explosive devices, in particular an explosive tube structure with uncoupled explosive charges. State of the art

[0002] The arrangement of explosive coils in a blast hole (eye) is called an explosive charge structure. An explosive charge in which the diameter of the explosives is smaller than the diameter of the blast hole, and a gap exists between the explosives and the wall of the blast hole, is called an uncoupled explosive charge. An uncoupled explosive charge can reduce the impact pressure on the hole wall, reduce or eliminate the fragmentation zone, extend the duration of the blast stress wave in the rock, increase the extent of the fracture zone, and provide more sufficient blast energy.

[0003] Smooth blasting refers to a controlled blasting technique where, through the correct selection of blasting parameters and a well-designed structure, delayed blasting is achieved in zones and sections to ensure that the post-blast contour meets the design requirements and that the cleared area is uniform and consistent. As an effective means of controlled blasting, smooth blasting is frequently used in the blasting and excavation of various tunnel projects. The explosive charge structure is key to implementing controlled blasting with edge boreholes, typically employing an uncoupled explosive charge structure.

[0004] Most existing uncoupled explosive charges use a PVC pipe, which is split in half. Emulsion explosives are then placed into the split pipe, and the explosives and the pipe are taped together. However, during detonations, the tape can easily tear and fail under the influence of high temperatures, and there is no separation between adjacent explosives. This causes the explosives to be blown out of their original position in the event of an overexploit, altering the initial explosive spacing and thus reducing the effectiveness of the detonations.

[0005] Chinese patent CN202122226678.X discloses a "non-coupled explosive charge structure" with publication number CN215676718U. The arrangement in this patent comprises a blast hole, an installation tube, several explosive packages, several air bubbles, two support blocks, and sealing clay. The installation tube has a semicircular cross-section with an opening on one side. The installation tube is inserted into the blast hole and is in contact with the bottom of the blast hole. Several explosive packages are attached at intervals along the axial direction of the installation tube within the opening, and one explosive package is arranged at each end of the installation tube. Several air bubbles are filled between the adjacent explosive packages and attached within the opening of the installation tube.Each of the support blocks has a semi-circular cross-section with an opening on one side; the outer diameter of the support blocks matches the diameter of the blast hole; the two support blocks are each attached to the outside of the two ends of the conduit, with the inner circumferential surface of the support blocks supporting the outer circumferential surface of the conduit, thus allowing the conduit to float and the explosive charges to be positioned in the axial position of the blast hole. However, this arrangement has some disadvantages: different blast points require different drilling depths, the conduit cannot be lengthened or shortened according to the drilling depth, and a conduit that is too long is inconvenient to transport and tends to break easily during transport. Disclosure of the utility model

[0006] The purpose of the present utility model is to provide a detonating tube structure with uncoupled explosive charges that can adjust the distance between explosive rolls and the length of the detonating tube according to the design requirements in order to solve the aforementioned problems of the prior art.

[0007] To solve the aforementioned problem, the present utility model provides the following technical solution: A detonating tube structure with uncoupled explosive charges, comprising a cannon tube with a semicircular cross-section, wherein a separating plate is slidably connected to the inner side wall of the cannon tube, the separating plate being provided with a cannon hole for inserting a detonating cord (6) that penetrates the separating plate from left to right; a sliding rail being rigidly connected to the inner side wall of the cannon tube, and the separating plate being provided with a sliding groove that fits the sliding rail; a positioning pin being inserted into the separating plate, and the sliding rail being provided with a positioning hole that fits the positioning pin.With the design described above, the distance between the explosives is adjusted according to the depth of the blast hole and the type of explosives in order to achieve the optimal distance between the uncoupled explosive charges, to avoid movement of the explosives and to improve the effect of smooth blasting.

[0008] Preferably, the upper end of the cannon tube is fixedly connected to a positioning sleeve with an internal thread, and the lower end of the cannon tube is fixedly connected to a guide sleeve, wherein a positioning screw passes through the inside of the guide sleeve and is secured in the positioning sleeve by means of a thread. With the embodiment described above, the length of the blast tube can be adjusted according to the depth of the blast hole, and the connection can be made more secure by means of threads.

[0009] Preferably, the lower end of the cannon tube is firmly connected to a locking rod, wherein the lower end of the locking rod is provided with a projection, and the upper end of the cannon tube is firmly connected to a connecting ring, wherein the connecting ring is provided with a locking groove that fits the locking rod.

[0010] With the design described above, the length of the blast tube can be adjusted according to the depth of the blast hole, and adjacent blast tubes can be connected more conveniently by plugging them together.

[0011] Preferably, the separating plate is provided with a spring receptacle for receiving a return spring, wherein the return spring is pushed onto the positioning pin, the upper end of the positioning pin being firmly connected to a positioning plate; the upper end of the return spring being firmly connected to the positioning plate, and the lower end of the return spring being firmly connected to the inner side wall of the spring receptacle.

[0012] The design described above prevents the positioning pin from being lost. When the separating plate needs to be moved, the positioning pin is pulled upwards. When the separating plate needs to be fixed, the positioning pin is released. The return spring then automatically locks the separating plate in place, which is faster and more convenient.

[0013] Preferably, a baffle plate is firmly connected to the outer side wall of the separating plate, wherein a space for inserting the detonating cord (6) is provided on the baffle plate (5); the adjacent baffle plates (5) are arranged opposite each other.

[0014] With the design described above, the impact plate can further prevent the explosive roll from exiting the blast tube after the separating plate has clamped the explosive roll.

[0015] Compared to the prior art, the advantageous effects of the present utility model are as follows: The spacing of the separating plates for securing the explosive rolls can be adjusted according to the length of the explosive rolls to prevent them from falling out. The spacing of the explosive rolls can be adjusted according to the design requirements to achieve the required spacing of the uncoupled explosive charges for this detonation.

[0016] The length of the blast tube can be adjusted according to the depth of the blast hole. Brief description of the drawings Fig. Figure 1 is a schematic representation of the structure of the present utility model; Fig. Figure 2 is a schematic representation of the structure of the front view of the present utility model; Fig. Figure 3 is a schematic representation of the structure of embodiment 1 of the present utility model. Fig. Figure 4 is a schematic representation of the structure of embodiment 2 of the present utility model. Fig. 5 is an enlarged cross-sectional view of A from Fig. 1. Detailed description of embodiments

[0017] With reference to the Fig. 1, Fig. 2 and Fig. 3. The present utility model offers a technical solution: A detonating tube structure with uncoupled explosive charges, comprising a cannon tube 1 with a semicircular cross-section, wherein a separating plate 2 is slidably connected to the inner side wall of the cannon tube 1, the separating plate 2 being provided with a cannon hole 26 for inserting a detonating cord 6 which penetrates the separating plate from left to right, the detonating cord 6 passing through the cannon hole 26; a sliding rail 11 is rigidly connected to the inner side wall of the cannon tube 1, and the separating plate 2 is provided with a sliding groove that fits the sliding rail 11; a positioning pin 21 is inserted into the separating plate 2, and the sliding rail 11 is provided with a positioning hole that fits the positioning pin 21.A baffle plate 5 is firmly connected to the outer side wall of the separating plate 2, with a space provided on the baffle plate 5 for the insertion of the detonating cord 6; the adjacent baffle plates 5 are arranged opposite each other.

[0018] With reference to the Fig. 2 and Fig. 5, the separating plate 2 is provided with a spring receptacle 22 for receiving a return spring 23, the return spring 23 being pushed onto the positioning pin 21, the upper end of the positioning pin 21 being fixedly connected to a positioning plate 24; the upper end of the return spring 23 being fixedly connected to the positioning plate 24, and the lower end of the return spring 23 being fixedly connected to the inner side wall of the spring receptacle 22; the upper surface of the positioning plate 24 being fixedly connected to a rope ring 25, the rope ring 25 being used to pull the positioning pin 21 out of the positioning hole; when the separating plate 2 needs to be moved, an operator pulls on the rope ring 25 to pull the positioning pin 21 out of the positioning hole. After the distance of the separating plate 2 has been adjusted, the operator releases the rope ring 25, and the positioning pin 21 is automatically inserted into the positioning hole under the action of the return spring 23.A baffle plate 5 is firmly connected to the outer side wall of the partition plate 2.

[0019] The upper end of the cannon tube 1 is fixedly connected to a positioning sleeve 31 with internal thread, and the lower end of the cannon tube 1 is fixedly connected to a guide sleeve 32, wherein a positioning screw 33 is passed through the inside of the guide sleeve 32, the positioning screw 33 passing through the guide sleeve 32 and being fastened in the positioning sleeve 31 by means of a thread.

[0020] When using this device, the operator first selects the number of required detonating tubes according to the depth of the blast hole, then aligns the ends of the adjacent detonating tubes and turns the positioning screw 33 to secure them in the positioning sleeve 31 and connect the adjacent detonating tubes; then the operator fills the explosive rolls one after the other in the following sequence: The separating plates 2 are adjusted, an explosive roll is placed between a first pair of adjacent separating plates 2 so that the separating plates 2 clamp the explosive roll, and the opposing baffle plates 5 can block the same explosive roll, then for the next pair of adjacent separating plates 2, the next separating plate 2 is adjusted according to the distance of the explosive rolls, and so on, until the filling of the explosive rolls is completed, and subsequently the detonating tube is inserted into the blast hole.As in the . Fig. 1, Fig. 2 and Fig. As shown in Figure 4, there are some changes in embodiment 2 compared to embodiment 1: The lower end of the cannon tube 1 is fixedly connected to a locking rod 41, the lower end of which is provided with a curved projection, and the upper end of the cannon tube 1 is fixedly connected to a connecting ring 42, the connecting ring 42 having a locking groove that fits the locking rod 41. Other parts remain unchanged according to embodiment 1.

[0021] When using this device, the operator first selects the number of required blast tubes according to the depth of the blast hole, and then inserts the locking rod 41 of the first blast tube into the locking groove of the connecting ring 42 of the second blast tube, repeating these steps continuously to connect the adjacent blast tubes;The operator then fills the explosive rolls one after the other in the following sequence: The separating plates 2 are adjusted, an explosive roll is placed between a first pair of adjacent separating plates 2 so that the separating plates 2 clamp the explosive roll, and the opposing impact plates 5 can block the same explosive roll, then for the next pair of adjacent separating plates 2 the next separating plate 2 is adjusted according to the distance of the explosive rolls, and so on, until the filling of the explosive rolls is completed, and then the detonating tube is inserted into the blast hole.

[0022] The structures, proportions, and sizes depicted in the drawings accompanying the description serve solely to illustrate the content disclosed therein and to make the information understandable and accessible to a person skilled in the art. They are not to be understood as restrictive conditions for the embodiments of this utility model and therefore have no essential technical significance. Any modifications to the structures, changes to the proportions, or adjustments to the sizes that do not impair the effectiveness and objectives of this utility model should remain within the scope of the technical content disclosed by this utility model. At the same time, the terms used in this description, such as "top," "bottom," "left," "right," "middle," and "one," serve only for the sake of clarity and are not intended to limit the scope of the embodiments of this utility model.Changes or adjustments to the relative relationships that do not involve a substantial change to the technical content are also considered to be within the scope of the present utility model.

[0023] The present utility model has been described above with reference to preferred embodiments; however, the scope of protection of the present utility model is not limited thereto. All technical solutions falling within the scope of protection of the claims are within the scope of protection of the present utility model. Various modifications may be made and parts thereof replaced by equivalents without deviating from the scope of the present utility model. In particular, the technical features mentioned in the various embodiments may be combined arbitrarily, as long as no design conflict exists. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 202122226678

[0005] CN 215676718U

[0005]

Claims

[1] Blasting tube structure with uncoupled explosive charges, comprising a gun tube (1) with a semicircular cross-section, characterized by that a partition plate (2) is slidably connected to the inner side wall of the gun barrel (1), the partition plate (2) being provided with a gun hole (26) for inserting a detonating cord (6); a slide rail (11) is fixedly connected to the inner side wall of the gun barrel (1), and the partition plate (2) is provided with a slide groove that matches the slide rail (11); a positioning pin (21) is inserted into the partition plate (2), and the slide rail (11) is provided with a positioning hole that matches the positioning pin (21). [2] Blasting tube structure with uncoupled explosive charges according to claim 1, characterized bythat the upper end of the cannon tube (1) is firmly connected to a positioning sleeve (31) with an internal thread, and the lower end of the cannon tube (1) is firmly connected to a guide sleeve (32), wherein a positioning screw (33) is guided through the interior of the guide sleeve (32), wherein the positioning screw (33) runs through the guide sleeve (32) and is fastened in the positioning sleeve (31) by means of a thread. [3] Blasting tube structure with uncoupled explosive charges according to claim 1, characterized by that the lower end of the gun tube (1) is fixedly connected to a locking rod (41), wherein the lower end of the locking rod (41) is provided with a projection, and the upper end of the gun tube (1) is fixedly connected to a connecting ring (42), wherein the connecting ring (42) is provided with a locking groove which fits the locking rod (41). [4] Blasting tube structure with uncoupled explosive charges according to claim 1, characterized by that the partition plate (2) is provided with a spring receptacle (22) for receiving a return spring (23), wherein the return spring (23) is pushed onto the positioning pin (21), wherein the upper end of the positioning pin (21) is firmly connected to a positioning plate (24); the upper end of the return spring (23) is firmly connected to the positioning plate (24), and the lower end of the return spring (23) is firmly connected to the inner side wall of the spring receptacle (22). [5] Blasting tube structure with uncoupled explosive charges according to one of claims 1 or 4, characterized by that a baffle plate (5) is firmly connected to the outer side wall of the separating plate (2), wherein a distance for inserting the detonating cord (6) is provided on the baffle plate (5); the adjacent baffle plates (5) are arranged opposite one another.

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