JP3807794B2 - Explosion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blasting device, and more particularly to a blasting device that enables continuous blasting.
[0002]
[Prior art]
The blasting technique is used as a technique for pulverizing solids into pieces. The principle of this explosion is that the solid matter is explosively pulverized by rapidly depressurizing the solid matter pressurized to a certain pressure or higher.
For example, it can be used when waste paper is used as a raw material for papermaking.
[0003]
However, the conventional blasting method simply depressurizes an object under a pressurized condition, so that there is a problem that the bombed object cannot be continuously blasted.
[0004]
[Problems to be solved by the invention]
The inventions of claim 1 and claim 2 have been made in view of the above points, and make it possible to continuously explode the material to be bombed, and to seize the material to be bombed at the time of abnormality during the blasting operation. The problem is to be able to prevent the danger caused by
It is an object of the present invention to provide the effects specific to the invention described in the column of the effects of the invention.
[0005]
[Means for Solving the Problems]
The technical means of the invention of claim 1 devised in order to solve the above-mentioned problem is that in the above-described blasting apparatus, “the bomb to be crushed (10) having a nozzle (12) at one end and being impregnated with a liquid at the other end” A cylinder (1) having an inlet (11) for charging;
Pumping material for pumping the material to be crushed (10) injected from the inlet (11) in the cylinder (1) to the nozzle (12) side in a compressed state in the axial direction of the cylinder (1). Means,
Heating means for heating the vicinity of the nozzle (12) in the cylinder (1);
A movable shaft (4) having a tapered portion facing the through-hole portion of the nozzle (12) and movable in the axial direction;
Propulsion means for imparting thrust to the movable shaft (4) to project the tapered portion into the through-hole portion;
Detecting means for detecting the temperature or pressure in the vicinity of the nozzle (12) in the cylinder (1);
When the output from the detection means exceeds a set value, the propulsion means is temporarily or continuously brought into a thrust reduction state in response to this.
[0006]
In the case of blasting by this blasting device, the bombed material (10) impregnated with a liquid such as water is introduced from the inlet of the cylinder (1), and the bombed material (10) is pumped inside the cylinder (1). Thus, it is pumped to the nozzle (12) side while being compressed in the axial direction. A taper portion of the movable shaft (4) protrudes from the through-hole portion of the nozzle (12), and the debris (10) is discharged from a gap on the outer periphery of the taper portion, and the gap is set to a predetermined gap. The heating means is provided in the vicinity of the nozzle (12), and further, the material to be crushed (10) is pumped to the nozzle (12) side by the pumping means. The material to be crushed (10) is compressed. On the other hand, since the material to be crushed (10) is in a liquid-impregnated state or a water-containing state, the liquid or moisture contained in the material to be crushed (10) is in a pressurized state.
[0007]
Since the material to be crushed (10) is pumped in a state compressed in the axial direction by the pumping means, the pressure generated by the pumping and heating does not reverse, and the pressure is directed toward the nozzle (12). When this detonated material (10), which reliably acts as a pressure for detonation, is discharged into the atmosphere from the nozzle (12) of the cylinder (1), the interior of the detonated material (10) is in a high pressure state to an atmospheric pressure state in this part. Since the pressure is suddenly reduced (to a pressure suitable for explosion), the explosion proceeds.
[0008]
In addition, since the pressure-feeding means is for pressure-feeding the material to be crushed (10) in a compressed state in the axial direction, the blasting proceeds continuously.
In the blasting step, when the material to be crushed (10) in the vicinity of the nozzle (12) in the cylinder (1) tends to solidify due to some abnormality, heating by the heating means and pressure feeding by the pressure feeding means are continued. Therefore, the temperature or pressure of the nozzle (12) in the cylinder (1) exceeds the set value. At this time, since the control means makes the propulsion means temporarily or continuously in a thrust reduction state in response to the output from the detection means, the tapered portion is retracted from the through-hole portion of the nozzle (12), and the nozzle ( In 12), the opening area of the discharge port portion of the material to be crushed (10) becomes large. As a result, the material to be crushed (10) is discharged more than before, the temperature or pressure decreases, and the tendency to solidify in the vicinity of the nozzle (12) is eliminated.
[0009]
In addition, the said thrust reduction state means the state which made thrust lower than the normal time including stopping a propulsion means. Further, the control means may be control means for stopping the heating by the heating means or setting the heating reduced state at the same time as the thrust reducing state as in the invention of claim 6.
The invention of claim 2 is: a cylinder (1) having an inlet (11) for introducing an object (10) having a nozzle (12) at one end and a liquid-impregnated state at the other end;
The cylinder (1) in at for pumping before Symbol nozzle (12) side Te in a compressed state in the axial direction of the cylinder has been the exposure grind (10) on (1) from the inlet (11) Continuous pumping means;
Heating means for heating the vicinity of the nozzle (12) in the cylinder (1);
A movable shaft (4) having a tapered portion facing the through-hole portion of the nozzle (12) and movable in the axial direction;
Propulsion means for imparting thrust to the movable shaft (4) for projecting the tapered portion into the through-hole portion;
Detecting means for detecting a temperature or pressure in the vicinity of the nozzle (12) in the cylinder (1);
When the output from the detection means exceeds a set value, in response to this, the heating control means for temporarily or continuously setting the heating means to a reduced heating state,
It consists of.
[0010]
In this case, if the temperature or pressure of the part of the nozzle (12) in the cylinder (1) exceeds a set value due to some abnormality, the heating means is temporarily or continuously in a reduced heating state. As in the invention of item 1, the temperature or pressure in the vicinity of the nozzle (12) in the cylinder (1) decreases.
In addition, the said heating reduced state means the state which reduced the amount of heating including the heating stop.
[0011]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the screw feeding means (2) is rotatably supported in the cylinder (1) and the screw feeder (2). And the driving means provided outside the cylinder (1) in order to drive the rotation of the screw feeder (2) with the insertion port (11) facing the base end ”.
[0012]
In this case, since the pumping means is the screw feeder (2), the continuous pumping force can be set large. Therefore, the degree of compression of the object to be crushed (10) can be increased, and the degree of fragmentation of the object to be crushed (10) by continuous explosion is promoted.
For example, in the waste paper explosion, when waste paper and moisture are introduced from the inlet (11), the waste paper in a water-containing state is pumped to the heating zone side by the screw feeder (2). During this pumping, the temperature rises to some extent and is heated to the final temperature in the heating zone.In this heating zone, the material to be crushed (10) is maintained at a temperature above the boiling point. (1) The inside will be maintained at a high pressure. The pressure generated in the cylinder (1) in the heating zone is directed to the inlet (11) through the screw feeder (2), but the waste paper as the material to be crushed (10) in the heating zone is removed. The screw feeder (2) and the cylinder (1) are closely packed and compressed. The gap between the screw feeder (2) and the cylinder (1) is sealed by this waste paper.
[0013]
When the object to be crushed (10) is discharged from the nozzle (12) by the rotation of the screw feeder (2), sudden decompression occurs during the discharge, and the object to be crushed (10) is crushed.
According to a fourth aspect of the present invention, in the third aspect of the invention, the shaft portion of the screw feeder (2) is the movable shaft (4), and the taper portion is integrally connected to the tip of the shaft portion. The position of the feeder (2) in the axial direction is adjusted by the propulsion means . '' In this case, the nozzle (12) can be controlled only by controlling the position of the screw feeder (2) in the axial direction. When the vicinity of becomes an abnormally high temperature or high pressure state, this abnormal state can be eliminated.
[0014]
As the heating means, a gas burner, an oil burner, and other various heating devices can be adopted. However, as in the invention of claim 5, in the invention of any one of claims 1 to 4, “the heating” is used. In the case where the means is an electric heater, the heating power can be controlled simply by controlling the electric power supplied to the electric heater, and is easy to control.
[0015]
【The invention's effect】
According to the first and second aspects of the invention, the explosion proceeds continuously, and the temperature or pressure in the vicinity of the nozzle (12) in the cylinder (1) rises abnormally due to some abnormality during the explosion process. If this happens, this is automatically resolved and the safety of the apparatus is ensured.
[0016]
According to the invention of claim 3, the degree of fragmentation of the material to be crushed (10) is improved.
According to the fourth aspect of the present invention, the tendency of the temperature or pressure in the vicinity of the nozzle (12) to rise abnormally can be eliminated only by controlling the position of the screw feeder (2) in the axial direction. The configuration can be simplified compared to the case where the movable shaft (4) is provided separately from (2).
[0017]
According to the invention of claim 5, the heating means is compact and has high safety.
According to the sixth aspect of the present invention, the safety is further improved since the propulsion means is brought into the thrust reduction state and the heating by the heating means is stopped at the time of abnormality.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described in detail with reference to the drawings.
[Embodiment 1]
In the first embodiment, a taper portion (21) at one end of a screw feeder (2) is inserted into a through-hole portion of a nozzle (12) attached to one end of a cylinder (1), and the screw feeder (2) is inserted into a cylinder. This is a configuration that is driven to rotate by a motor (22) provided on the outer surface of the other end of (1). The screw feeder (2) is formed with a thread groove on the outer periphery, and the other end is rotatably supported by a rolling bearing (14) interposed between the inner peripheral wall of the cylinder (1).
[0019]
The through hole of the nozzle (12) is a tapered hole (13) that expands toward the inside of the cylinder (1). The diameter of the inner end of the tapered hole (13) is the same as the inner diameter of the cylinder (1), and the nozzle (12) and the cylinder (1) are coaxial. A heating means (3) is provided in the vicinity of the nozzle (12) of the cylinder (1). The heating means (3) is composed of three annular heaters (30), (30) having a constant width wound so as to surround the cylinder (1). In this example, the heaters (30), (30) The temperature inside the heating means (3) in the cylinder (1) is maintained at a set temperature by controlling the heating amount of (). As shown in FIG. 2, the heater (30) includes a sheathed heater (301) wound in contact with the outer surface of the cylinder (1) and a heat insulating layer (302) covering the outer periphery of the sheathed heater (301). ) And a protective ring (303) covering the outer periphery thereof.
[0020]
In order to maintain the set temperature, a temperature sensor (31) for detecting the temperature of the wall surface of the cylinder (1) around which the heater (30) (30) is wound is provided, and detection from the temperature sensor (31) is provided. The temperature is input to the temperature controller (32). A signal corresponding to the set temperature from the temperature setter (33) is input to the temperature controller (32), and the heaters (30), (30) are output from the temperature controller (32). ) Is controlled, and the temperature in the vicinity of the nozzle (12) of the cylinder (1) is maintained at the set temperature.
[0021]
The screw feeder (2) is transmitted to the motor (22) via the speed reducer (23) provided at the other end of the cylinder (1). The screw feeder (2) is rotatably supported by a rolling bearing (14) at the other end of the cylinder (1). The screw feeder (2) is in an axially movable relationship with the rolling bearing (14), and in a portion other than the support portion by the rolling bearing (14), relative to the cylinder (1) and in the axial direction. It is in a movable relationship.
[0022]
The screw feeder (2) is connected and integrated with the output shaft (24) of the speed reducer (23), and the output shaft (24) moves in the axial direction with respect to the casing of the speed reducer (23). It is provided freely. An output shaft of the hydraulic cylinder (25) attached to the casing and the output shaft (24) are connected to each other by a shaft coupling (26) so as to be relatively rotatable. Accordingly, the screw feeder (2) is pushed toward one end of the cylinder (1) by the thrust set by the hydraulic cylinder (25).
[0023]
The speed reducer (23) includes a first spur gear (231) attached to the output shaft of the motor (22) and a second spur gear (232) engaged with the first spur gear (232) and attached to the output shaft (24). The latter second spur gear (232) is relatively movable in the axial direction with respect to the first spur gear (231).
In the blasting device of the above embodiment, the material to be crushed (10) is fed from the hopper (111). In this example, waste paper impregnated with water as the material to be crushed (10) is put into the hopper (111). The hopper (111) is provided with a screw feeder type pushing device (112) for pushing the material to be crushed (10) toward the inlet (11). Then, the material to be crushed (10) is fed into the gap between the screw feeder (2) and the cylinder (1) through the inlet (11).
[0024]
When the screw feeder (2) is driven to rotate by the rotation of the motor (22), the material to be crushed (10) is moved to the nozzle (12) side by the action of the screw groove formed on the outer peripheral surface of the screw feeder (2). Pumped. The material to be crushed (10) between the screw feeder (2) and the cylinder (1) is compressed in the axial direction by the pressure feeding. Further, the temperature of the crushed object (10) rises due to frictional heat accompanying this pumping.
[0025]
When the material to be crushed (10) reaches the heating zone, it is positively heated by the heat from the heaters (30) and (30). In this example, since the material to be crushed (10) is waste paper, the heating temperature is set to 130 ° C to 190 ° C. The temperature set in this way is inputted from the temperature setter (33) to the temperature controller (32) as the first set temperature α1. Then, by the output from the temperature controller (32), the temperature of the cylinder (1) in the heating zone is maintained at the first set temperature α1.
[0026]
In the part of the heating zone, the crushed material (10) in a water-containing state is heated and pressurized (or compressed) (internal pressure: 30 to 70 kg / cm ² ), and the screw feeder (2) is rotated. The explosive material (10) is discharged into the atmosphere through an annular gap (corresponding to the nozzle (12)) between the tapered portion (21) and the tapered hole (13) of the nozzle (12). ) Is rapidly depressurized, and this depressurization explodes the material (10) to be crushed into fibrous strips. The greater the degree of decompression, the greater the effect of explosion. Therefore, a device for discharging the material to be crushed (10) into the vacuum chamber may be used.
[0027]
The blasting is continuously performed each time the material (10) to be blown by the rotation of the screw feeder (2) is discharged from the gap between the nozzle (12) and one end of the screw feeder (2).
The hydrated debris (10) in a water-containing state is accommodated in a pressurizing chamber to be in a sealed pressurizing state (internal pressure: 30 to 70 kg / cm ² ), and then the pressure chamber is rapidly opened to rapidly depressurize. It is also possible to perform explosion, but in comparison with this explosion, in the case of continuous explosion using the apparatus of the above example, the workability of explosion is improved and the sound during explosion is reduced. .
[0028]
In the apparatus of the example described above, the screw feeder (2) is in a relationship of being able to advance and retract in the axial direction with respect to the cylinder (1). The screw feeder (2) is pushed to one end side (nozzle (12) side) of the cylinder (1) with a constant thrust by the hydraulic cylinder (25). Therefore, the annular gap between the taper hole (13) and the taper portion (21) suitable for the occurrence of the explosion is caused by the thrust and the material (10) to be crushed in the cylinder (1) by the heating means (3). And the pumping force by the screw feeder (2). By adjusting or setting each of these values, the nozzle (12) can be removed from the state where the taper portion (21) is in close contact with the small diameter side (outer end portion) of the tapered hole (13) of the nozzle (2). The taper hole (13) can be adjusted in the range up to the maximum gap that is fully open. That is, the opening area of the nozzle (12) can be adjusted within a wide range.
[0029]
If an abnormality occurs in the explosion, the temperature of the object (10) between the cylinder (1) and the screw feeder (2) in the vicinity of the nozzle (12) may be in an abnormally overheated state. In this case, the pressure applied to the material to be crushed (10) (pressure at the filling portion of the material to be crushed (10) in the cylinder (1)) also tends to increase to an abnormal value. When it exceeds, the screw feeder (2) is retracted against the thrust by the hydraulic cylinder (25), and the gap between the taper hole (13) and the taper portion (21) tends to increase, and the cylinder (1) and the screw feeder ( 2) The degree of pressurization (compression degree) of the material to be crushed (10) in between is reduced, and the abnormal overheating-pressurization state is alleviated.
[0030]
In this way, the screw feeder (2) is configured to be able to advance and retract in the axial direction with respect to the cylinder (1), and the screw feeder (2) is pressed against the nozzle (12) with a predetermined thrust. Therefore, it is possible to prevent abnormal overheating and abnormal pressurization (particularly abnormal heating and abnormal pressurization in the vicinity of the heating means (3)) of the debris (10) in the heating means (3).
[0031]
In addition to the above configuration, the present embodiment employs the following control device in order to perform the heating temperature control operation smoothly and to enhance safety.
As a control means including the temperature controller (32), a control device using a microcomputer is adopted. The control device is configured to execute the program shown in the flowchart of FIG. This configuration will be described with reference to FIG.
[0032]
When the control operation is executed, the motor (22) is driven and the hydraulic pressure supplied to the hydraulic cylinder (25) is increased to the set pressure, and the heaters (30) and (30) are heated. Thereafter, the heat generation amount of the heater (30) is set to a large heat amount larger than a certain value (step (ST-301)), and the detected temperature α of the temperature sensor (31) is determined by the step (ST-302). When the first set temperature α1 suitable for explosion is not reached, the heat generation amount of the heaters (30) and (30) is maintained at a large heat amount. When the detected temperature α becomes equal to or higher than the first set temperature α1, the calorific value is made smaller than a certain value to make a small calorific value state (step (ST-303)). Thereafter, when the detected temperature α falls below the first set temperature α1, this is determined in step (ST-304), and the process returns to step (ST-301). In this way, the temperature of the heating means (3) in the cylinder (1) is maintained at a constant temperature by controlling the amount of heat generated by the heaters (30) and (30).
[0033]
In this example, when the detected temperature α does not coincide with the first set temperature α1, it is always determined whether or not the second set temperature α2 is higher than the first set temperature α1 by a certain temperature. (Step (ST-305)). When the temperature is lower than the second set temperature α2, the process returns to step (ST-301) through step (ST-304). Conversely, when the temperature is higher than the second set temperature α2, The hydraulic pressure supplied to the hydraulic cylinder (25) is lowered (step (ST-306)). Thereafter, it is determined whether or not the detected temperature α is lower than the first set temperature α1 (step (ST-307)).
[0034]
When the detected temperature α is lower than the first set temperature α1, the process returns to step (ST-301), the heaters (30) and (30) are restored to the large heat quantity state, and the respective parts are in the normal operation state. Returned to
If the detected temperature α does not fall below the first set temperature α1 even after a lapse of a certain time from the step (ST-306), each part is stopped (step (ST-308)).
[0035]
Thus, if the detected temperature α in the cylinder (1) becomes higher than the second set temperature α2 due to abnormal overheating, the hydraulic pressure supplied to the hydraulic cylinder (25) is reduced and the thrust of the screw feeder (2) is reduced. Since it is lowered, the inside of the cylinder (1) is easy to return to a safe pressure state. When a state where the detected temperature α is higher than the second set temperature α2 due to some abnormality continues for a certain period of time, the operation of each part is stopped, so that danger due to abnormal overheating can be prevented.
[0036]
In this embodiment, in order to prevent the danger due to abnormal overheating, the operation for the danger prevention is executed in response to the detected temperature α of the temperature sensor (31). The same safety can be ensured by detecting the internal pressure in the vicinity of the nozzle (12) in this embodiment and executing the operation for preventing the danger in response to the detected pressure.
[0037]
In this embodiment, the configuration is such that the hydraulic pressure supplied to the hydraulic cylinder (25) is set to a low pressure state in step (ST-306) .In addition, this step (ST-306) is shown in FIG. As shown in FIG. 4, the heater (30) may be turned off. In this case, in step (ST-308), the motor (22) is stopped and the cylinder (25) is only turned off.
[0038]
[Embodiment 2]
In Embodiment 1 above, the taper portion (21) at one end of the screw feeder (2) is projected from the inside of the cylinder (1) into the taper hole (13) of the nozzle (12). As shown in FIG. 5, in addition to the screw feeder (2), a movable shaft (4) having a cone (41) as a tapered portion (21) is provided. This movable shaft (4) is provided on a cover (40) that covers the outside of the nozzle (12) so as to be able to advance and retract, and the cone (41) protrudes from the outer surface side of the nozzle (12) into the mouth (120). Yes. The movable shaft (4) is urged to be pushed toward the nozzle (12) by a hydraulic cylinder (27) attached to the cover (40).
[0039]
The thrust in the axial direction of the hydraulic cylinder (27) is such that the discharge pressure of the debris (10) discharged from the mouth (120) of the nozzle (12) at one end of the cylinder (1) becomes a value suitable for explosion. It is stipulated in.
Accordingly, in the same manner as in the first embodiment, the volume expansion due to the amount of heat applied in the heating zone in the cylinder (1), the pumping force by the screw feeder (2), and the cone (41). Due to the discharge pressure determined by the degree of blockage of the mouth (120), the material (10) to be crushed is exploded when discharged from the outer peripheral gap of the cone (41).
[0040]
Also, if the pressure in the cylinder (1) becomes abnormally high, the thrust by the hydraulic cylinder (27) is lost and the movable shaft (4) moves backward, thereby increasing the opening of the mouth (120), The discharge amount of the detonated material (10) from the outer peripheral gap of the cone (41) increases, and the pressure in the cylinder (1) decreases. Thereby, abnormal pressurization or abnormal overheating can be prevented.
[0041]
A control device similar to that in the first embodiment (control device that executes the flowchart shown in FIG. 2 or FIG. 4) is also added to the second embodiment. In this case, the heating temperature in the cylinder (1) can be maintained at the first set temperature α1 by the heaters (30) and (30), and in the abnormal heating state, there is a risk of rising to an abnormal value of the internal pressure of the cylinder (1). The danger of abnormally high temperatures can be avoided. In the flowchart of the control device employed in the second embodiment, the hydraulic cylinder (25) is replaced with a hydraulic cylinder (27).
[0042]
[Others]
The means for urging the screw feeder (2) of the first embodiment in the axial direction and the means for urging the movable shaft (4) of the second embodiment in the axial direction are both hydraulic cylinders. Sometimes, in the case of an apparatus that only controls the heating means (3) to a reduced heating state, the hydraulic cylinder that also functions as the urging means may be replaced with another urging means such as a spring.
[0043]
In the control device that executes the flowchart of FIG. 4, when the detected temperature α from the temperature sensor (31) reaches the second set temperature α2, the hydraulic cylinder (25) (in the second embodiment, the hydraulic cylinder (27)) is supplied. Although the supply pressure is reduced to reduce the thrust and the heaters (30) and (30) are turned off, the heating value of the heaters (30) and (30) can be reduced or reduced as in the invention of claim 2. It is good also as a structure only to turn off.
[0044]
In the control device shown in FIGS . 3 and 4, the detected temperature α of the temperature sensor (31) is set to the first setting when the set time elapses after the hydraulic cylinder (25) is reduced in the thrust reduction state in step (ST-306). When the temperature is reduced to α1, it is judged that there is a minor abnormality, and the operation returns to step (ST-301) (initial control state). There is no inconvenience to be executed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a first embodiment of the present invention. FIG. 2 is a detailed view of a heater (30). FIG. 3 is a flowchart of a control program of a control device employed in the first embodiment. Explanatory drawing which shows other embodiment of an apparatus. [FIG. 5] Sectional drawing of Embodiment 2 [Explanation of a sign]
(1) ・ ・ ・ Cylinder (25) ・ ・ ・ Hydraulic cylinder
(10) ・ ・ ・ Explosive material (26) ・ ・ ・ Shaft coupling
(11) ・ ・ ・ Inlet (231) ・ ・ First spur gear
(12) ・ ・ ・ Nozzle (232) ・ ・ Second spur gear
(120) ・ ・ Mouth (3) ・ ・ ・ Heating means
(13) ・ ・ ・ Taper hole (30) ・ ・ ・ Heater
(14) ・ ・ ・ Rolling bearing (31) ・ ・ ・ Temperature sensor
(2) ... Screw feeder (32) ... Temperature controller
(21) ・ ・ ・ Tapered part (33) ・ ・ ・ Temperature setter
(22) ... Motor (40) ... Cover
(23) ・ ・ ・ Reduction gear (41) ・ ・ ・ Cone
(24)... Output shaft (4)... Movable shaft The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (6)

A cylinder (1) having a nozzle (12) at one end and a charging port (11) for charging an object (10) in a liquid-impregnated state at the other end;
Pumping material for pumping the material to be crushed (10) injected from the inlet (11) in the cylinder (1) to the nozzle (12) side in a compressed state in the axial direction of the cylinder (1). Means,
Heating means for heating the vicinity of the nozzle (12) in the cylinder (1);
A movable shaft (4) having a tapered portion facing the through-hole portion of the nozzle (12) and movable in the axial direction;
Propulsion means for imparting thrust to the movable shaft (4) to project the tapered portion into the through-hole portion;
Detecting means for detecting the temperature or pressure in the vicinity of the nozzle (12) in the cylinder (1);
When the output from the detection means exceeds a set value, in response to this, control means for temporarily or continuously setting the propulsion means to a thrust reduction state;
Explosion device consisting of A cylinder (1) having a nozzle (12) at one end and a charging port (11) for charging an object (10) in a liquid-impregnated state at the other end;
Continuously for feeding the detonated material (10) charged from the inlet (11) in the cylinder (1) to the nozzle (12) side in a compressed state in the axial direction of the cylinder (1). Pressure feeding means;
Heating means for heating the vicinity of the nozzle (12) in the cylinder (1);
A movable shaft (4) having a tapered portion facing the through-hole portion of the nozzle (12) and movable in the axial direction;
Propulsion means for imparting thrust to the movable shaft (4) to project the tapered portion into the through-hole portion;
Detecting means for detecting the temperature or pressure in the vicinity of the nozzle (12) in the cylinder (1);
When the output from the detection means exceeds a set value, in response to this, the heating control means for temporarily or continuously setting the heating means to a reduced heating state,
Explosion device consisting of The pressure feeding means includes a screw feeder (2) rotatably supported in the cylinder (1), and a driving means provided outside the cylinder (1) for rotationally driving the screw feeder (2). The blasting device according to claim 1 or 2, wherein the insertion port (11) faces the base end of the screw feeder (2). The shaft portion of the screw feeder (2) is the movable shaft (4), and the taper portion is integrally connected to the tip of the shaft portion, and the axial position of the screw feeder (2) is adjusted by the propulsion means . The blasting apparatus according to claim 3, which is configured as described above. The explosion device according to any one of claims 1 to 4, wherein the heating means is an electric heater. When the output from the detection means exceeds a set value, the control means is a means for temporarily or continuously setting the propulsion means in a thrust reduction state in response to this and stopping heating by the heating means. The explosion device according to claim 1.

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