JP5128862B2 - Blast delay device and circuit - Google Patents

Description

  The present invention relates to a blast delay device and a circuit.

Conventional detonators that delay the detonation time in units of 25/1000 seconds and 25/100 seconds are widely known.
In the case of blasting with steps in normal civil engineering work, the purpose can be achieved with such a delay time.
However, for example, when a building is demolished by blasting, it is necessary to blast dozens of columns with a time lag, which requires a delay in seconds between the first blast and the last blast. .

There are two problems to ensure such a long delay time.
One is a problem that there is no commercial product that can obtain such a long time difference alone, and that if it is custom-made, the price jumps rapidly and is not practical.
Therefore, for example, as shown in FIG. 6, if a plurality of commercially available detonators with a fire guide tube are connected and a short time difference is accumulated, a long time difference can be theoretically obtained.
However, making such a long circuit is not practical, and the second problem is that the debris of the structure that was previously blown off will cut the conduit that leads to unexploded explosives. There is sex.

The present invention that solves the above-mentioned problems is composed of a container, a detonator with a igniter tube having a delay detonator at the end of the igniter tube, and a plurality of isolation members arranged inside the container, comprising a separating member. A detonator with a single detonator in which a delay detonator is located in the space between each isolation member, and a detonator with other detonator having a detonator in contact with the delay detonator in the space between each isolator The separating member is characterized by a blast delay device having such a strength that it is not damaged by the impact of the burst of the delay detonator .
Furthermore, the present invention uses a plurality of blast delay devices described in the preceding paragraph, and each blast delay device has a different delay time. Each blast delay device is installed near the structure to be blasted, and the input of all blast delay devices. Connect one side of the igniter tube to a common igniter tube circuit for ignition, connect the one on the output side of each blast delay device to the blasting detonator, and connect one end of the igniter tube circuit for ignition Is characterized by a blasting circuit that is connected to a detonator and has a time difference.

Since the blast delay device and circuit of the present invention are as described above, the following effects can be obtained.
<1> Input the energy of detonation at high speed from one ignition tube circuit constructed by connecting a plurality of detonators with a plurality of blast tubes to a plurality of blast delay devices, and then in each blast delay device Thus, the delay time is secured. Therefore, even if a part of the ignition conduit circuit is cut off by a scattered material such as concrete debris from the previous blasting, the ignition energy is already in the blast delay device. Therefore, even if the ignition conduit circuit is cut off, an unexploded explosive does not remain, and even if it is a blast with a time difference of several tens of stages, a complete blast can be performed.
<2> Although a plurality of detonators with a conducting tube are accommodated inside the blast delay device, each detonator with a conducting tube is partitioned by a separating member. Therefore, even if the detonator with a conducting tube in the container is ruptured sequentially, the adjacent detonator with a conducting tube is not affected. As a result, it is possible to obtain a sufficient delay time by arranging a large number of detonators with a conducting tube in parallel.
<3> It should be possible to set any delay time using a specially designed, custom-designed expensive detonator. However, the device of the present invention is very economical because it can delay the blasting time by using a low-priced detonator equipped with a light guide tube that is commercially available in large quantities.
<4> By increasing the number of detonators with a lead tube inside the blast delay device, the delay time can be secured freely in one blast delay device.
<5> Scattered objects due to the preceding blast not only cut the ignition conduit circuit but also fall on the blast delay device. However, since the blast delay device of the present invention is housed in a strong container, there is no phenomenon that the blast delay device itself is damaged or a subsequent one is blown up first. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

<1> The structure of the blast delay device A.
The blast delay device A of the present invention includes a container 1, a detonator 2 with a conducting tube provided with a delay detonator 21 at the end of the conducting tube 22, and an isolation member.
Here, the isolation member means a member for isolating so as not to transmit the impact of the explosion of the adjacent detonator to other detonators.
In the following embodiments, first, a case where the cylindrical body 3 is used as a separating member will be described.

<2> Container 1.
The container 1 which comprises the blast delay apparatus A is a box for accommodating the following members.
The dimensions of the container 1 include an area where a predetermined number of cylinders 3 can be placed and a depth where sand can be filled.
Since the container 1 needs to be not damaged even when a concrete fragment or the like collides from the outside, a strong steel material is used.

<3> Tube 3.
A plurality of cylinders 3 are arranged inside the container 1.
This cylinder 3 is a simple cylinder with both ends open, and for example, a steel pipe, a vinyl chloride pipe, etc., having a thickness that does not break due to the impact of the bursting of the delayed detonator 21 is used.
The length of the cylindrical body 3 is longer than the length of the delay detonator 21 described later, and the inner diameter is slightly larger than the outer diameter of the delay detonator 21.

<4> Detonator 2 with a lead tube.
The detonator 2 with a lead tube is a commercially available product, and is configured by attaching a delay detonator 21 to the end of the lead tube 22.
The fire guide tube 22 is configured by applying an explosive on the inner surface of a plastic tube.
The delay detonator 21 is attached to the igniter tube 22 and is commercially available as a single unit, and a delay agent is located between the internal ignition agent and the initiator.
The time from ignition to detonation can be adjusted by increasing or decreasing the amount of the delay agent.

<5> Connection of the detonator 2 with a lead tube.
One end of the detonator 22 of the other detonator 2 with a conducting tube is externally attached to the delay detonator 21 of one detonator 2 with a conducting tube by tape or the like.
The cylindrical body 3 is slid and positioned outside thereof.
As a result, the delay detonator 21 is located inside the cylinder 3, a first igniter tube 22 a connected to the delay detonator 21 extends from one side of the cylinder 3 to the outside, and from the other side of the cylinder 3, The second light guide tube 22b externally attached to the delay detonator 21 extends to the outside.
A delay detonator 21 is attached to the other end of the second igniter tube 22b.
The end of the next light guide tube 22 is externally attached to the delay detonator 21 inside the next cylinder 3.
In this way, the time can be delayed in accordance with the number of delay detonators 21 by sequentially attaching and extending the next light guide tubes 22 to the delay detonator 21 inside the cylinder 3.

<6> Storage in container 1.
Sand is laid in the container 1 with a certain thickness.
Then, as described above, the plurality of cylinders 3 connected by the fire guide tube 22 are sequentially arranged on the sand layer with some space.
Further, the cylinder 3 and the fire guide pipe 22 are embedded in the sand by further filling with sand.
In that case, a part of the igniter tube 22 of the first and last detonator 2 with the igniter tube is exposed to the outside of the container 1.
The first igniter tube 22 is the igniter tube 22 of the detonator 2 with the igniter tube in which the delay detonator 21 at the end thereof is located inside the cylindrical body 3 in the container 1.
The last igniter tube 22 is the igniter tube 22 of the detonator 2 with the igniter tube in which the delay detonator 21 at the end thereof is located outside the container 1.

<7> Input and output.
The exposed portion of the first heat guide tube 22 to the outside of the container 1 becomes the input side heat guide tube 22N.
An igniter tube circuit 7 for ignition and an electric circuit 9 for igniting which will be described later are connected to the end of the igniter tube 22N on the input side.
The last exposed portion of the heat guide tube 22 to the outside of the container 1 is an output side heat guide tube 22S.
The detonator at the end of the output side guide tube 22S is used as an output detonator 51, and this detonator 51 is inserted into the parent die 5.
A plurality of explosives such as dynamite are arranged in contact with the parent die 5, and these are installed inside a hole to be destroyed, for example, a hole opened in a support column 8 of a building to be blown up.
Alternatively, a detonator with a conduit having a connector block can be used as the last detonator with a conduit.

<8> Partition plate.
Although the above is the structure which uses the cylinder 3 as a separating member, as shown in FIG. 3, the partition plate 6 can also be used as a separating member.
Even when the partition plate 6 is used, the structure in which the next-stage igniter tube 22 is externally attached to the delay detonator 21 of the detonator 2 with the igniter tube and sequentially connected is the same as in the previous embodiment. .
However, in that case, the detonator 2 with a conducting tube does not need to be stored inside the cylinder 3.
A partition plate 6 is interposed between the delay detonator 21 and the delay detonator 21 in place of the cylindrical body 3 so as to prevent the influence of the scattered matter due to the burst of the delay detonator 21 on the surroundings.
In the case of this embodiment, if only the partition plate 6 is provided inside the container 1, it is not necessary to insert the cylinder 3 around the outer periphery of each delayed detonator 21, so that the storing operation into the container 1 is performed quickly. be able to.
The partition plate 6 is not limited to a single plate, and a bent steel plate or the like in which the space between the delay detonator 21 and the delay detonator 21 protrudes in a mountain shape can be used.

<9> Usage method.
Next, an actual method of using the above-described blast delay device A will be described.

<10> Delay time design.
A plurality of the above-mentioned blast delay devices A are manufactured.
In that case, the quantity of the detonator 2 with a fire guide installed in each blast delay device A is changed and installed.
As a result, the delay time can be varied according to the design amount for each blast delay device A.

<11> Installation on site.
A case will be described in which a plurality of pillars 8 of a building as shown in FIG. 4 are not destroyed at the same time but are destroyed with a time difference.
Each strut 8 has a hole for explosive insertion.
The hole is filled with explosives for blasting, and the parent die 5 is installed for detonation inside the explosives. Although the explosive is not shown in the figure, it is the explosive that actually destroys the column 8.
Then, the blast delay device A of the present invention is installed in the immediate vicinity of the column 8.
In that case, a blast delay device A having a delay time designed according to the order of destruction is installed.
The squib 22S on the output side from the blast delay device A is made as short as possible to reduce the chance of breakage.
For this purpose, for example, it is embedded in a notch installed in the support column 8, and its surface is covered with an iron plate or the like to avoid damage.
Then, the igniting tubes 22N on the input side of all the blast delay devices A are connected to one igniting guiding tube circuit 7 formed by connecting a plurality of detonators with igniting tubes.

<12> A light guide tube circuit for ignition.
The ignition conduit circuit 7 for ignition is a set of ignition conduit groups configured by sequentially connecting a plurality of detonators 2 with a conduit with a commercially available connector block 71 interposed therebetween.
The connector block 71 is commercially available as a kind of detonator with a conducting tube, and the impact of the detonator can be transmitted to the conducting tube to split the energy.
One end of the ignition conduit circuit 7 for ignition is connected to the initiator 4.
The first explosive may use the delay time because the delay agent of the detonator itself functions without the intervention of the blast delay device A.

<13> Other ignition circuit.
In the above embodiment, a detonator group with a lead tube is used as the light guide tube 7 for ignition.
However, as in the embodiment of FIG. 5, the ignition circuit can also be constituted by an electric detonator group.
That is, the detonator electric detonator 42 is attached to the igniter tube 22N for input of each blast delay device A.
Then, the two leg wires of each initiation electric detonator 42 are sequentially connected, and the first and last are connected to the initiation device 4 to form an ignition electric circuit 9.

<14> Blasting work.
At the time of blasting, the detonator 41 for blasting is ruptured by the detonator 4 and input to the igniter tube circuit 7 for ignition.
Since the ignition conduit circuit 7 is branched and connected to all the blast delay devices A, for example, at the speed of about 2000 m / s, all the blast delay devices A are connected to the blast delay devices A almost instantaneously. Energy is transmitted through the tube 22N.
Within each blast delay device A, a delay time is created according to the number of delay detonators 21 of the detonator 2 with a conducting tube, and then output from the output conducting tube 22S to detonate the parent die 5 inside the column. The explosive filled inside as an agent is blown up, and the support column 8 is destroyed.
As shown in the embodiment of FIG. 5, when the ignition electric circuit 9 is configured, all the electric detonators 42 for the explosion burst almost instantaneously by the electric signal from the detonator 4, and the blast delay device from the lead tube 22N. Enter in A.

<15> When the circuit is damaged.
As described above, since the ignition energy is input almost simultaneously to the plurality of blast delay devices A, the concrete piece of the support column 8 is scattered by the early stage blasting, and the impact is ignited by the igniter tube circuit 7 for ignition. Alternatively, even if the ignition electric circuit 9 is cut, the ignition conduit circuit 7 and the ignition electric circuit 9 have already been used, and the energy in the blast delay device A in the later stage It does not affect the transmission.
Thus, a large number of blast delay devices A can be used to reliably destroy a large number of objects through a multi-stage time difference.

Explanatory drawing of the Example of the blast delay apparatus of this invention which uses the cylinder as a separating member. Explanatory drawing of the state which connects the following one with a delay detonator. Explanatory drawing of the Example which uses the partition plate as a separating member. Explanatory drawing of the installation in the case of destroying a some support | pillar sequentially. Explanatory drawing of the Example which uses an electric circuit for ignition. Explanatory drawing at the time of connecting the detonator with a heat guide tube.

Explanation of symbols

1: Container 2: Detonator with a lead tube 21: Delayed detonator 22: Lead tube 22a: First guide tube 22b: Second guide tube 22N: Input side guide tube 22S: Output side guide Tube 3: Cylindrical body 4: Detonator 41: Detonator for detonation 5: Parent die 51: Detonator for output 6: Partition plate 7: Inductor tube circuit for ignition 71: Connector block 8: Post 9: Electric circuit for ignition

Claims (5)

Consists of a container, a detonator with a detonator equipped with a delay detonator at the end of the detonator, and an isolation member,
A plurality of isolation members arranged inside the container;
A single detonator with a flue tube with a delayed detonator located in the space between each isolation member;
Consists of other detonators with other igniter tubes that are arranged in contact with the delay detonator in the space between each isolation member,
The isolation member has a strength that does not break due to the impact of the bursting of the detonator.
Blast delay device. Adopting a cylindrical body as a separating member,
The blast delay device according to claim 1. Adopting a partition plate as a separating member,
The blast delay device according to claim 1. Inside the container,
Filled with sand,
The input end of the combustion of the detonator with a single detonator,
The other end of the detonator with a detonator
Exposed outside the container,
The blast delay device according to claim 1. A plurality of blast delay devices according to claim 1 are used,
Different delay times for each blast delay device,
Each blast delay device is installed near the structure to be blasted,
Connect the blast tube on the input side of all blast delay devices to a single igniter tube circuit that consists of multiple detonators with blast tubes connected.
Connect the blast tube on the output side of each blast delay device to the blasting detonator,
One end of the ignition conduit circuit was connected to the detonator,
Blast delay circuit.

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