JPH1094736A - Explosive crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To explode a material to be exploded continuously and also to prevent a danger due to burning of the like of the material on abnormality during explosive crushing work. SOLUTION: A cylinder 1 is provided with a nozzle 12 and a feeding port 11 for feeding the material 10 to be explosively crushed in a liquid impregnated state at one end and at the other end respectively. The material 10 fed from the feeding port 11 to the cylinder 1 is continuously, forcibly fed to a nozzle 12, and also the vicinity of the nozzle 12 is heated. A moving shaft equipped with a taper part facing a through hole part of the nozzle 12 and movable in the axis line direction is provided, and also thrust is given to the moving shaft. When an output from a detecting means for detecting temperature or pressure in the vicinity of the nozzle 12 exceeds the set one, responding to this, the thrust is temporarily or continuously made in a reduced state or the heating is made in a lowered state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion
The present invention relates to an explosion device capable of continuous explosion.

[0002]

2. Description of the Related Art The explosion crushing technique is used as a technique for pulverizing solid matter into fragments. The principle of this explosion is to explode the solid by explosively crushing the solid which has been pressurized to a certain pressure or more. For example, it can be used when waste paper is used as a raw material for papermaking.

[0003] However, the conventional explosion method has a problem that the object to be exploded cannot be continuously exploded because the object under the pressurized condition is rapidly reduced in pressure.

[0004]

SUMMARY OF THE INVENTION Claims 1 and 2
The present invention has been made in view of the above points, and has been made to enable continuous explosion of an object to be exploded, and to prevent danger due to seizure of the object to be exploded at the time of abnormality during the explosion operation. Is the task. Claim 3-
An object of the sixth invention is to provide an effect peculiar to the invention described in the column of the effect of the invention.

[0005]

In order to solve the above-mentioned problems, the technical means of the invention according to the first aspect of the present invention resides in the above explosion apparatus, wherein the explosion device comprises a nozzle (12) at one end and a liquid impregnation at the other end. A cylinder (1) having an input port (11) for charging the to-be-exploded object (10), and the to-be-exploded object (10) input from the input port (11) in the cylinder (1); Pumping means for pressure-feeding to the nozzle (12) side in a state compressed in the axial direction of the cylinder (1), 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 opening of the nozzle (12) and movable in the axial direction; and a thrust for projecting the tapered portion into the through opening formed by the movable shaft (4). ) And the nozzle (1) in the cylinder (1).
2) detecting means for detecting the temperature or pressure in the vicinity of the control, and when the output from the detecting means exceeds a set value, in response thereto, control for temporarily or continuously setting the propulsion means to a thrust reduced state. And means ”.

In the case of blasting with this explosive device, an object to be blasted (10) impregnated with a liquid such as water is introduced from an inlet of a cylinder (1), and the object to be blasted (10) is placed in the cylinder (1). Is sent to the nozzle (12) side by a pumping means while being compressed in the axial direction. A tapered portion of the movable shaft (4) protrudes from the through-hole portion of the nozzle (12), and the blasted material (10) is discharged from a gap on the outer periphery of the tapered portion.The gap is set to a predetermined gap. That the nozzle
A heating means is provided in the vicinity of (12).
2) The explosive object (10) is compressed because it is fed to the side. On the other hand, since the object to be blasted (10) is in a liquid-impregnated state or a water-containing state, the liquid or moisture contained in the object to be blasted (10) is in a pressurized state.

[0007] Since the object to be detonated (10) is compressed in the axial direction by the pumping means, the pressure generated by the pumping and the heating does not reverse, and the pressure is increased by the nozzle (12). When the blasted material (10), which reliably acts as the explosive pressure toward the side, is discharged from the nozzle (12) of the cylinder (1) to the atmosphere, the blasted material
Since the inside of (10) is rapidly reduced in pressure from a high pressure state to an atmospheric pressure state (to a pressure suitable for explosion), explosion proceeds.

The explosion means continuously feeds the object to be exploded in the same direction while compressing the object in the axial direction, so that the explosion proceeds continuously. In the blasting step, if the object to be blasted (10) in the vicinity of the nozzle (12) in the cylinder (1) tends to solidify due to some abnormality, the heating by the heating unit and the pumping by the pumping unit are continued. The nozzle in the cylinder (1)
The temperature or pressure of the part (12) exceeds the set value. At this time, since the control means temporarily or continuously puts the propulsion means in the thrust reduced state in response to the output from the detection means, the tapered portion is retracted from the through port of the nozzle (12),
In (12), the opening area of the discharge port of the object to be bombed (10) is increased. Thereby, the object to be bombed (10) is discharged more than before, and the temperature or the pressure drops, and the nozzle (1)
The tendency to solidify in the vicinity of 2) is eliminated.

The thrust reduction state refers to a state in which the thrust is lower than normal, including stopping the propulsion means. Further, the control means may be a control means for stopping the heating by the heating means at the same time as setting the thrust reduced state or for setting the heating reduced state. The invention of claim 2 is characterized in that "the nozzle (12)
A cylinder (1) having an input port (11) for inputting an explosive crushed material (10) in a liquid-impregnated state at the other end, and from the input port (11) in the cylinder (1). Pumping means for continuously feeding the input explosive crushed material (10) to the nozzle (12) side in a state of being compressed in the axial direction of the cylinder (1);
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 applying a thrust to the movable shaft (4) for projecting the tapered portion into the through-hole portion, and the cylinder
(1) detecting means for detecting the temperature or pressure in the vicinity of the nozzle (12), and when the output from the detecting means exceeds a set value, the heating means is temporarily or continuously responsive to the output. And a heating control means for setting the heating to a reduced heating state.

In this case, when the temperature or pressure of the nozzle (12) in the cylinder (1) exceeds a set value due to some abnormality, the heating means is temporarily or continuously reduced in heating. Accordingly, the temperature or the pressure in the vicinity of the nozzle (12) in the cylinder (1) decreases as in the first aspect of the invention. Note that the reduced heating state refers to a state in which the amount of heating is reduced, including the stop of heating.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, it is preferable that the pressure feeding means is a cylinder (1)
Screw feeder (2) rotatably supported inside
And driving means provided outside the cylinder (1) to rotationally drive the screw feeder (2), and the inlet (11) faces the base end of the screw feeder (2). I didn't. "

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 (10) can be increased, and the degree of fragmentation of the object (10) by continuous explosion is promoted. For example, in the explosion of waste paper, when waste paper and water are introduced from the inlet (11), the waste paper in a water-containing state is fed to the heating area side by the screw feeder (2). During this pumping, the temperature rises to some extent,
In the heating zone, the object (10) is heated to the final temperature.In this heating zone, the temperature of the cylinder (1) in the heating zone is maintained at a high pressure because the object (10) is maintained at a temperature higher than the boiling point. Becomes And the cylinder (1) in this heating area
The pressure generated in the heating area is directed to the inlet (11) side via the screw feeder (2), but the waste paper as the object to be blasted (10) in the heating area is turned into the screw feeder (2) and the cylinder (1).
Are in a tightly packed and compressed state. The waste paper seals the gap between the screw feeder (2) and the cylinder (1).

When the object to be exploded (10) is discharged from the nozzle (12) by the rotation of the screw feeder (2), a sharp pressure reduction occurs during this discharge, and the object to be exploded (10) is exploded. The invention according to claim 4 is the invention according to claim 3, wherein the shaft of the screw feeder (2) is connected to the movable shaft (4).
And the tapered portion is integrally connected to the tip of the shaft portion,
The configuration is such that the axial position of the screw feeder (2) is adjusted by the movable shaft advance / retreat means, '' in this case, only by controlling the axial position of the screw feeder (2), When the vicinity of the nozzle (12) becomes abnormally high temperature or high pressure, this abnormal state can be resolved.

As the heating means, a gas burner, a petroleum burner, and other various heating devices can be adopted. In the invention according to any one of claims 1 to 4, like the invention of claim 5, In the case where "the heating means is an electric heater", the heating can be controlled simply by controlling the electric power supplied to the electric heater, and the control is easy.

[0015]

According to the first and second aspects of the present invention,
As the explosion proceeds continuously and the temperature or pressure near the nozzle (12) in the cylinder (1) tends to rise abnormally due to some abnormality during the explosion process, this is automatically resolved and the Safety is ensured.

According to the third aspect of the present invention, the degree of fragmentation of the object (10) is improved. According to the invention of claim 4,
By merely controlling the position of the screw feeder (2) in the axial direction, the tendency of the temperature or pressure in the vicinity of the nozzle (12) to abnormally increase can be eliminated, so that the movable shaft (2) is provided separately from the screw feeder (2). 4) The configuration can be simplified as compared with the case of providing.

According to the fifth aspect of the present invention, the heating means is compact and has high safety. According to the invention of claim 6, in the event of an abnormality, the thrust is reduced and the heating by the heating means is stopped, so that the safety is further improved.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. [Embodiment 1] In this embodiment 1, a taper portion (21) at one end of a screw feeder (2) is inserted into a through-opening portion of a nozzle (12) attached to one end of a cylinder (1). The feeder (2) is rotatably driven by a motor (22) provided on the outer surface of the other end of the cylinder (1). The screw feeder (2) has a thread groove formed on the outer periphery, and the other end is rotatably supported by a rolling bearing (14) interposed between the screw feeder (2) and the inner peripheral wall of the cylinder (1).

The through-hole of the nozzle (12) is a cylinder.
A tapered hole (13) expanding toward the inside of (1). The inner end of the tapered hole (13) has the same diameter as the inner diameter of the cylinder (1), and the nozzle (12) and the cylinder (1) are coaxial. A heating means (3) is provided near the nozzle (12) of the cylinder (1). This heating means (3)
Consists of three annular heaters (30) (30) having a constant width wound around the cylinder (1). In this example, the heating amount of the heaters (30) (30) is controlled. By doing so, the temperature inside the heating means (3) in the cylinder (1) is maintained at the set temperature. The heater (30)
As shown in FIG. 2, a sheath heater (301) wound around the outer surface of the cylinder (1), a heat insulating layer (302) covering the outer periphery of the sheath heater (301), and And a protection ring (303) covering the outer periphery.

In order to maintain the set temperature, the heater
(30) A temperature sensor (31) for detecting the temperature of the wall surface of the cylinder (1) around which the (30) is wound is provided.
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 heater (30) (30) is output by an output from the temperature controller (32). ) Is controlled to maintain the temperature of the portion of the cylinder (1) near the nozzle (12) at the set temperature.

The screw feeder (2) communicates with the motor (22) via the speed reducer (23) provided at the other end of the cylinder (1). The screw feeder (2) has a rolling bearing at the other end of the cylinder (1).
It is rotatably supported by (14). The screw feeder (2) has an axially movable relationship with the rolling bearing (14), and in a portion other than the support portion by the rolling bearing (14), the relative rotation and the axial direction with respect to the cylinder (1). They are in a movable relationship.

The screw feeder (2) is connected to and integrated with an output shaft (24) of the speed reducer (23), and the output shaft (24) is axially connected to a casing of the speed reducer (23). It is provided movably in the direction. An output shaft of a hydraulic cylinder (25) attached to the casing and the output shaft (24) are relatively rotatably connected by a shaft coupling (26). Therefore,
The screw feeder (2) is pushed to one end of the cylinder (1) by a thrust set by the hydraulic cylinder (25).

The speed reducer (23) has a first spur gear (231) attached to the output shaft of the motor (22) and a second spur gear (23) meshed with the first spur gear (231) and attached to the output shaft (24). 232), and the second spur gear (232) is relatively movable relative to the first spur gear (231) in the axial direction within a certain range.
In the blasting device of the above embodiment, the blasted object (10) is charged from the hopper (111). In this example, the object to be bombed (10)
The waste paper impregnated with water is put into the hopper (111). The hopper (111) is provided with a screw feeder type push-in device (112) for pushing the blasted material (10) into the inlet (11). Then, the object to be bombed (10) is fed into the gap between the screw feeder (2) and the cylinder (1) through the inlet (11).

When the screw feeder (2) is rotated by the rotation of the motor (22), the screw feeder (2) is rotated.
Due to the action of the screw groove formed on the outer peripheral surface of (2), the blasted object (10) is pressure-fed to the nozzle (12) side. By the above-mentioned pressure feeding, the object to be detonated (10) between the screw feeder (2) and the cylinder (1) is compressed in the axial direction. In addition, the explosive crushed object (10) increases its own temperature due to frictional heat accompanying this pressure feeding.

When the object (10) reaches the heating zone, it is actively heated by the heat from the heaters (30). In the case of this example, since the object to be exploded (10) is waste paper, the heating temperature is set to 130 ° C to 190 ° C. The temperature thus set is input from the temperature setter (33) to the temperature controller (32) as the first set temperature α1. The output of the temperature controller (32) causes the temperature of the cylinder (1) in the heating zone to be reduced to the first set temperature α1.
Will be maintained.

In the heating zone, the blasted material (10) in a water-containing state is heated and pressurized (or compressed) (internal pressure: 30-70 kg / cm ² ), and the screw feeder (2) With the rotation, the object to be bombed (10) is tapered (2
When discharged into the atmosphere through an annular gap (corresponding to the nozzle (12)) between the tapered hole (13) of the nozzle (1) and the explosive
Since the pressure of (10) is rapidly reduced, the decomposed object (10) is exploded into fibrous strips by the reduced pressure. The greater the degree of pressure reduction, the greater the effect of explosion. Therefore, the blasted material (10)
May be discharged to a vacuum chamber.

The explosion is continuously performed each time the object to be exploded (10) fed 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 blasted material (10) in a water-containing state is accommodated in a pressurized chamber and sealed and pressurized (internal pressure: 30 to 70 kg / c).
m ² ), and thereafter, it is possible to perform explosive crushing by suddenly opening the pressurizing chamber to rapidly reduce the pressure.
Compared to this explosion, in the case of continuous explosion using the apparatus of the above example, the workability of the explosion is improved and the sound during the explosion is reduced.

In the apparatus of the above-described example, the screw feeder (2) is capable of moving back and forth in the axial direction with respect to the cylinder (1). The screw feeder (2) is pushed to one end (nozzle (12) side) of the cylinder (1) with a constant thrust by a hydraulic cylinder (25). Therefore, a tapered hole (13) and a tapered portion (21) suitable for the above explosion to occur
Is determined by the thrust, the heating temperature of the object to be bombarded (10) in the cylinder (1) by the heating means (3), and the pumping force by the screw feeder (2). By adjusting or setting these values, the nozzle (12) can be moved from the state where the gap is zero, where the tapered portion (21) is in close contact with the small diameter side (outer end) of the tapered hole (13) of the nozzle (2). Can be adjusted in the range up to the fully opened maximum gap. That is, the opening area of the nozzle (12) can be adjusted in a wide range.

If an abnormality occurs in the explosion, the cylinder (1) and the screw feeder (2) near the nozzle (12)
The temperature of the object to be bombed (10) during the period may be in an abnormally overheated state. In this case, the pressure of the object to be blasted (10) (the pressure of the filling portion of the object to be blasted (10) in the cylinder (1)) also tends to rise to an abnormal value, but the pressure becomes constant. When it exceeds, the screw feeder (2) is retracted against the thrust by the hydraulic cylinder (25), and the tapered hole (13) and the tapered portion (2
The gap of 1) tends to increase, and the degree of pressurization (degree of compression) of the explosive crushed object (10) between the cylinder (1) and the screw feeder (2) is reduced, resulting in the abnormal overheating.
The pressurized state is relieved.

As described above, the screw feeder (2) is configured to be able to advance and retreat 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. With this configuration, it is possible to prevent abnormal overheating and abnormal pressurization of the object to be blasted (10) in the heating means (3) (in particular, abnormal heating and abnormal pressurization in the vicinity of the heating means (3)). .

In addition to the above configuration, this embodiment employs the following control device so that the heating temperature control operation can be smoothly performed and the safety can be enhanced. As a control means including the temperature controller (32), a control device using a microcomputer is employed. The control device is configured to execute the program shown in the flowchart of FIG. This configuration will be described with reference to FIG.

When the control operation is performed, the motor (22) is driven, 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 value of the heater (30) is set to a large heat value larger than a certain value (step (ST-301)), and the temperature sensor
The detected temperature α of (31) is determined in step (ST-302), and when the detected temperature α does not reach the first set temperature α1 suitable for explosion, the heating value of the heaters (30) and (30) is maintained at a large value. Is done. When the detected temperature α becomes equal to or higher than the first set temperature α1, the calorific value is made smaller than a fixed value to be in a small calorific value state (step (ST-303)). Thereafter, when the detected temperature α falls below the first set temperature α1, this
The determination is made in (ST-304), and the process returns to the step (ST-301). Thus, 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).

In this example, if 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. It is determined (step (ST-305)).
If the temperature is lower than the second set temperature α2, the step (S
The process returns to step (ST-301) via T-304). Conversely, if the temperature is higher than the second set temperature α2, the hydraulic pressure supplied to the hydraulic cylinder (25) is reduced (step (S
T-306)). Thereafter, it is determined whether the detected temperature α has dropped below the first set temperature α1 (step (ST-30)).
7)).

If the detected temperature α is lower than the first set temperature α 1, the process returns to step (ST-301), and the heaters (30) and (30) are restored to the large heat quantity state, and Returned to normal operation. If the detected temperature α does not drop below the first set temperature α1 even after a certain time has elapsed from the step (ST-306), each part is stopped (step (ST-306)).
308)).

As described above, when the detected temperature α becomes higher than the second set temperature α2 in the cylinder (1) due to abnormal overheating, the hydraulic pressure supplied to the hydraulic cylinder (25) is reduced and the screw feeder (2) Since the thrust of the cylinder (1) is reduced, the inside of the cylinder (1) easily returns to a safe pressure state. If the detected temperature α becomes higher than the second set temperature α2 due to some abnormality for a certain period of time, the operation of each part is stopped, so that danger due to abnormal overheating can be prevented.

In this embodiment, in order to prevent the danger caused by 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 the cylinder (1) and executing the operation for preventing the danger in response to the detected pressure.

In this embodiment, the step (ST-
306), the hydraulic pressure supplied to the hydraulic cylinder (25) is set to a low pressure state. In addition to this, this step (ST-306) is performed by turning off the heater (30) as shown in FIG. May be adopted. In this case, in step (ST-308), the cylinder (25) is simply turned off at the same time as the motor (22) is stopped.

[Second Embodiment] In the first embodiment,
The tapered portion (21) at one end of the screw feeder (2) is projected from the inside of the cylinder (1) into the tapered hole (13) of the nozzle (12). In the second embodiment, as shown in FIG. In addition to the screw feeder (2), the cone (4
A movable shaft (4) having (1) is provided. The 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 retreat, and the cone (41) projects from the outer surface side of the nozzle (12) into the mouth (120). I have. In addition, the movable shaft (4)
Is urged to be pushed out toward the nozzle (12) by a hydraulic cylinder (27) attached to the cover (40).

The thrust in the axial direction of the hydraulic cylinder (27) is such that the discharge pressure of the object (10) discharged from the mouth (120) of the nozzle (12) at one end of the cylinder (1) is a value suitable for explosion. It is determined to be. Therefore, in the same manner as in the first embodiment, the volume expansion due to the amount of heat applied in the heating area in the cylinder (1), the pumping force by the screw feeder (2), and the pressure by the cone (41). Mouth
Due to the discharge pressure determined by the degree of blockage of (120), the object to be blasted (10) is blasted when discharged from the outer peripheral gap of the cone (41).

When the pressure in the cylinder (1) becomes abnormally high, the thrust of the hydraulic cylinder (27) is lost, and the movable shaft (4) retreats, whereby the opening of the mouth (120) increases. The blasted material (10) from the outer circumferential gap of the cone (41)
The discharge rate of the cylinder increases, and the pressure in the cylinder (1) decreases.
Thereby, abnormal pressurization or abnormal overheating can be prevented.

The second embodiment also includes the first embodiment.
A control device (control device for executing the flowchart shown in FIG. 2 or FIG. 4) similar to that in FIG. In this case, the heating temperature in the cylinder (1) can be maintained at the first set temperature α1 by the heaters (30), and in an abnormal heating state, there is a danger that the internal pressure of the cylinder (1) rises to an abnormal value. 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 by 7).

[Others] The means for urging the screw feeder (2) in the first embodiment in the axial direction and the means for urging the movable shaft (4) in the second embodiment in the axial direction are both hydraulic cylinders. However, when the controller is abnormal,
(3) In the case of an apparatus that only controls the heating to a reduced heating state, the hydraulic cylinder, which also functions as an urging means, may be replaced with another urging means such as a spring.

In the control device for executing 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) ), The thrust is reduced, and the heaters (30) and (30) are turned off. However, the amount of heat generated by the heaters (30) and (30) is reduced. Alternatively, it may be configured to simply turn it off.

In the control device shown in FIGS. 2 and 4, after the hydraulic cylinder (25) is brought into the thrust reduction state in step (ST-306), when the set time has elapsed, the detected temperature α of the temperature sensor (31) is reduced. When the temperature has dropped to the first set temperature α1, it is determined that a slight abnormality has occurred and the process returns to step (ST-301) (initial control state). Is not overly executed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of Embodiment 1 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;

FIG. 4 is an explanatory diagram showing another embodiment of the control device.

FIG. 5 is a cross-sectional view of Embodiment 2;

[Explanation of symbols]

(1) ・ ・ ・ Cylinder (25) ・ ・ ・ Hydraulic cylinder (10) ・ ・ ・ Explosive object (26) ・ ・ ・ Shaft coupling (11) ・ ・ ・ Inlet (231) ・ ・ First spur gear (12 ) ・ ・ ・ Nozzle (232) ・ ・ Second spur gear (120) ・ ・ Mouth (3) ・ ・ ・ Heating means (13) ・ ・ ・ Tapered hole (30) ・ ・ ・ Heater (14) ・ ・ ・Rolling bearing (31) ・ ・ ・ Temperature sensor (2) ・ ・ ・ Screw feeder (32) ・ ・ ・ Temperature controller (21) ・ ・ ・ Tapered part (33) ・ ・ ・ Temperature setting device (22) ・ ・ ・Motor (40) ・ ・ ・ Cover (23) ・ ・ ・ Reducer (41) ・ ・ ・ Cone (24) ・ ・ ・ Output shaft (4) ・ ・ ・ Movable shaft Note that the same reference numerals in each drawing are the same or equivalent. Show the part.

Claims (6)

[Claims] A cylinder (1) having a nozzle (12) at one end and an input port (11) for inputting an explosive crushed material (10) in a liquid-impregnated state at the other end; ), A pressure feeding means for pressure-feeding the blasted material (10) input from the input port (11) toward the nozzle (12) in a state of being compressed in the axial direction of the cylinder (1); A 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 opening of the nozzle (12) and movable in the axial direction, Propulsion means for applying a thrust to the movable shaft (4) for projecting the tapered portion into the through-hole portion; and the nozzle (1) in the cylinder (1).
2) detecting means for detecting the temperature or pressure in the vicinity of the control, and when the output from the detecting means exceeds a set value, in response thereto, control for temporarily or continuously setting the propulsion means to a thrust reduced state. Means for explosion. 2. A cylinder (1) having a nozzle (12) at one end and an input port (11) for inputting an explosive crushed material (10) in a liquid-impregnated state at the other end; ), A continuous pumping means for pumping the blasted object (10) input from the input port (11) toward the nozzle (12) in a state of being compressed in the axial direction of the cylinder (1), 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 applying a thrust to the movable shaft (4) for projecting the tapered portion into the through-hole portion, and detection for detecting a temperature or pressure near the nozzle (12) in the cylinder (1). Means, and when the output from the detection means exceeds a set value, in response thereto, the heating means is temporarily or continuously turned on. And heating control means for thermally reduced state, blasting apparatus comprising a. 3. A screw feeder (2) rotatably supported in a cylinder (1), and a pressure feeder provided outside the cylinder (1) for driving the screw feeder (2) to rotate. The explosive crushing device according to claim 1 or 2, further comprising a driving means provided, wherein the inlet (11) faces the base end of the screw feeder (2). 4. The screw feeder (2) has a shaft portion as the movable shaft (4), and the tapered portion is integrally connected to a tip of the shaft portion, and the axial position of the screw feeder (2) is 4. The blasting device according to claim 3, wherein the blasting device is configured to be adjusted by the reciprocating means. 5. The blasting apparatus according to claim 1, wherein said heating means is an electric heater. 6. When the output from the detection means exceeds a set value, the control means temporarily or continuously sets the propulsion means in a thrust reduced state in response to the output, and controls heating by the heating means. The explosion device according to claim 1, wherein the explosion device is means for stopping the explosion.