WO2011117337A1 - Cartridge system for explosives in cartridges - Google Patents

Abstract

The invention relates to a cartridge system for use with explosives for seismic investigations, having cartridges (6) which contain explosive, have attachment means for connection to one another at their lower and upper ends, and in which a cover (8) for holding an explosive fuze (4) is arranged at the upper end, and a closure plug (9) is arranged at the lower end, in order to produce an explosive column (7). In order to allow the cartridge system to be loaded using commercially available explosive cartridges and to be assembled to form any desired length on site using simple means, it is proposed that the cartridges (6) be cylindrical and be composed of plastic, and that each cartridge (6) have an external groove system (10) at the lower cartridge end (11) and an internal groove system (12) at the upper cartridge end (13), and that the cartridges (6) can be pushed one inside the other telescopically, wherein the lower cartridge end (11) of a cartridge (6) can be inserted into the upper cartridge end (13) of another cartridge (6), and the two cartridges (6) are connected by latching the outer groove system (10) on one cartridge (6) to the internal groove system (12) on the other cartridge (6).

Description

 Cartridge system for cartridges explosives

The invention relates to a cartridge system, for use in explosions for seismic investigations, containing cartridges containing explosives, at their lower and upper ends fastener to connect with each other and for the preparation of an explosive column at the top of a lid for Aufnah me a Sprengzü nders u nd on u nteren end a sealing plug is arranged. Cartridges that contain explosives are also referred to as cartridges explosives. Cartridge explosives are paper-wrapped cylindrical cartridges 2 or foil-filled explosive in which the cartridges are in the form of a sausage with closure clip 3 at each end (see Figure 1). Both cartridges are also referred to below as explosive cartridges.

State of the art:

Blasting operations designed to generate seismic waves for underground exploration use rigid, screw-down cartridges, which are inserted either singly or as screwed-together cartridges into wells of varying depths. The individual cartridges have for this purpose on one end face a closure plug or an expansion sleeve with a thread and on the opposite end face a counter-thread, so that by simply screwing the cartridges an explosive column is to be produced. At least in the uppermost cartridge of the explosive column, a lid is introduced, which has a tube for receiving a detonator. In this tube, a detonator is inserted, protrude from the fuse wires, which are led out of the borehole. This finished component is referred to as explosives column. To block the explosive columns in the borehole are sealing plugs, which are also designed as expansion sleeves (also known as anchors), known. These can be compressed when inserting the explosive columns in the holes and lock in the opposite direction. To effect a seismic detonation, one or more wells are drilled into which the explosive is introduced and detonated with special detonators suitable for seismic detonation. The resulting waves reflected on the earth layers are then registered and evaluated.

The seismic explosives are usually introduced in plastic cartridges, in which they are filled directly from the manufacturer. The filling openings of the cartridges are finally closed by the manufacturer with a lid, which has a receptacle for the special seismic detonator. This Aufnah me is usually a firmly molded on the lid plastic sleeve, which disappears when the lid is mounted, with their predominant length in the explosive. Alternatively, the lid can be without recording. Then, a receptacle for the detonator is created in which the lid is pierced with a spike and the mandrel in the explosive creates a cavity for the detonator. In this recording the detonator is inserted before loading the well.

Subsequently, the connection wires of the igniter are secured by a wrap of the cartridge to this and the explosive column at the connection wires in the well h lowered. Alternatively, a connection wire relief on the cartridge or the lid may be provided. The protruding from the borehole wire ends are then electrically connected to the ignition device, which then the blasting and the start of the registration and evaluation is triggered. The cartridges are available in various lengths and diameters to allow adjustment of the amount of explosive and adjustment to the diameter of the wellbore. They usually have the ability to couple cartridges together to increase the amount of explosive per well. This is done for example by a mounted at the bottom of the cartridge coarse but short, single or multi-start external thread, which is screwed into an internal thread at the upper end of the cartridge or in a, located in the cover internal thread. In addition, the cartridges are provided with a sealing plug. The purpose of the plug with integrated expansion sleeve is to better insert the cartridge into the drill hole. The plug prevents unauthorized removal of the cartridge (s) from the wellbore.

The invention has the object of developing a cartridge system according to the preamble of claim 1 so that it can be loaded instead of the direct filling with seismic explosives with commercial explosive cartridges of different numbers and / or length and can be assembled with simple means in any length on site ,

According to the invention, this object is solved by the features of claim 1.

The fact that each cartridge has an outer corrugation and an inner corrugation and the cartridges telescope into one another, wherein the uorte cartridge end of a cartridge in the upper cartridge end of another cartridge or vice versa and both cartridges by engagement of the outer corrugation are connected to a cartridge with the inner corrugation of the other cartridge, the Push cartridges into each other and put together with simple means in any length telescopically on site.

A preferred embodiment is characterized in that the cartridges are cylindrical and made of plastic and each cartridge has an outer corrugation at the lower end of the cartridge and an inner corrugation at the upper cartridge end and the cartridges can telescope into each other, the lower end of a cartridge Cartridge in the upper cartridge end of another cartridge is inserted and both cartridges are connected by engagement of the outer corrugation of a cartridge with the inner corrugation of the other cartridge. Cylindrical cartridges are easy to manufacture and can be easily pushed together.

Preferably, all cartridges are closed at their lower end cartridge via a bottom plate, wherein in the bottom plate preferably a vent opening is arranged. As a result, the air escapes when pushed together. The bottom plate forms the lower end face and limits the cartridge interior downwards. Of course, top and bottom can also be reversed.

In a preferred embodiment, the corrugations are formed radially encircling or spiral. With these corrugations, the construction of the assembly is simplified. However, any corrugation may be used that allows radial expansion or radial contraction of the cartridge. Under corrugations are generally understood the surface of the cartridge magnifying surface sections. Preferably, the outer corrugation extends over a smaller length of the cartridge than the inner corrugation. The outer corrugation can be shorter because this is sufficient for anchoring. The inner corrugation also serves to compensate for different lengths of the explosive cartridges.

Preferably, the inner corrugation extends over half the length of the cartridge. Thus, the explosive cartridge or the charging station of several explosive cartridges can be between half the length of the cartridge and about 80% of the cartridge. The remaining approximately 20% of the cartridge, which is provided with an inner corrugation, is required to receive and seal the next cartridge or the lid.

Preferably, the sealing plug are provided with an inner corrugation and locked when pushing the sealing plug on a cartridge, the outer corrugation of a cartridge with the inner corrugation of the stopper.

In an advantageous embodiment variant, the sealing plugs, like the cartridges, are of cylindrical design and have the same diameter as the cartridges to be connected to them, and the sealing plugs are provided with an inner corrugation and lock the outer when the closure plugs are pushed onto the lower cartridge end of a cartridge Corrugation of the lower cartridge end with the inner corrugation of the sealing plug.

In a preferred embodiment, the lid has an outer corrugation, which locks when inserting the lid into a cartridge with the inner corrugation on the cartridge.

Preferably, the lid, like the cartridges and the sealing plug, has a cylindrical shape and has an outer corrugation, which when inserting the lid into the upper cartridge end of a cartridge is latched to the inner corrugation at the upper cartridge end of the cartridge. The lid preferably has a plastic sleeve for receiving a detonator.

In one embodiment, the lid has a firmly molded plastic sleeve with an integrated tip for receiving a detonator 4. For sealing a seal is preferably arranged between two latching corrugations. To accommodate the seal, the corrugations can be adjusted accordingly.

A method for assembling an explosive column with the cartridge system just described is characterized in that during the assembly process of the cover with the cartridge, the plastic sleeve with the integrated tip pierces the explosive cartridge and dips with its predominant length in the explosive of the explosive cartridge.

Preferably, the detonator is inserted into the plastic sleeve.

In the method, an explosive cartridge is preferably inserted into the lowermost cartridge, and then either the lid is pushed in or a second cartridge is inserted with the explosive cartridge already inserted until the lower cartridge end of the second cartridge is seated on the upper end of the explosive cartridge in the lowermost cartridge. The first cartridge is preferably pushed onto its lower end by a sealing plug, and a lid is pushed into the uppermost cartridge at its upper end. The sealing plug (or alternatively the upper end of the cartridge) is preferably designed as an expansion sleeve. Preferably, cartridges, lids and plugs are sent without explosive cartridges to a site and is there with Explosive cartridges and detonators a ready-to-use explosive column created. The cartridge system according to the invention thus consists of a system of cartridges with a few different diameters and a few different lengths to the variety of offered cartridges explosives, so-called explosives cartridges to use. The cartridges are made of plastic and are ausgefüh rt that a cartridge with its lower end in a different diameter, at the upper end can be telescoped, whereby the free length can be adjusted within the cartridge, the length of the explosive cartridge used. In addition, there is an additional sealing ability of the components with each other by means of integrated seals. The seals can be for example O-rings or sealing lips. Optionally, the cartridge with lid, cartridge with cartridge and sealing plug (sealing plug with expansion sleeve) can be connected watertight to the cartridge.

The cartridges are delivered differently than in the current state of the art, initially unfilled to the customer and thus do not constitute dangerous goods. The cartridges are then filled on site, by the customer with commercially available, locally available non-couplable explosive cartridges.

In this description, the term explosive cartridges is also used for patronized explosives. Both appendices describe the same subject.

Commercially available explosives for use with the invention are both paper wrapped cylindrical explosives cartridges and Foil tube filled explosive, in which the cartridges have the shape of a sausage. Since both forms of explosive cartridges are available in different lengths and diameters in the market, the cartridge system according to the invention consists of a few plastic cartridges available in different lengths and diameters.

To compensate for different lengths of explosive cartridges, these have an e x e cu e r th e re se f u n d u n te at the end of the cartridge and a long inner corrugation at the upper end of the cartridge. The lower end is the end facing the lowest point of the borehole, and the upper end is the end of the cartridge system facing the earth's surface when the cartridge system has been lowered into the borehole.

If only one cartridge is needed to achieve the calculated amount of explosive, this is equipped by the user with the explosive cartridge and sealed with a lid. The lid has a corrugation at its largest diameter, which engages in the inner corrugation of the upper cartridge end. During assembly, the lid is pressed through the upper, long corrugation of the cartridge until it rests on the explosive cartridge and locks in place. The lid also has a firmly molded plastic sleeve with an integrated tip, for receiving the detonator described above. This tip stings automatically during the assembly process of the lid, the explosive cartridge and disappears with their predominant length in the explosive of the explosive cartridge. An Andornen of the explosive is thus superfluous. The lid also has two optional fixed hooks through which the detonator wires are looped for attachment.

Due to the long corrugation of the upper end of the cartridge, different lengths of explosive cartridges of a certain length window can be used in the same cartridge. If you want to increase the amount of explosives use an additional cartridge, this is in turn equipped with an explosive cartridge and coupled under the cartridge, which is already equipped with a lid. The length compensation of the explosive cartridges is carried out in the same way as described above, but instead of the lid, the upper cartridge is pushed into the lower, until it rests on the explosive or on the underlying explosive cartridge.

This telescoping system thus allows different lengths of explosive cartridges to be used in a cartridge. The cartridges are formed cyl inderförm ig, the lower end is a bottom plate forming closed. Thus, when pushing the lid into the cartridge or a cartridge in another cartridge, which can escape compressed air thereby, each cartridge has a vent in its bottom plate.

If explosives are used which are not water resistant, it must be prevented that water or other liquids penetrate into the cartridge system. For this reason, seals (eg O-rings or sealing lips) are used to seal the cover opposite the upper cartridge, the upper one opposite the lower one, and the sealing plugs with an armature opposite the upper one. The present invention is an enclosed sealing plug with an anchor, which, in addition to the functions of introduction into the borehole which already represent the state of the art and the prevention of unauthorized extraction of the explosive cartridges from the borehole, additionally has the function of watertight sealing The vent located on the lower cartridge in conjunction with the O-ring seal.

The invention will be further explained with reference to two figures. All figures "top" or "bottom" in the figures refer to the borehole, below being the end facing the lowest point of the borehole and the top facing the earth's surface. Bottom therefore always means to stopper 9 and above always to the lid 8 out.

Alternatively, the explosive column can also be formed in reverse.

Figure 1 shows in various views an inventive

Cartridge system for use in blasting for seismic

Investigations.

FIG. 1a shows a ready-to-use explosive column 7 for entering a borehole. FIG. 1 b shows the same explosive column 7 in section. Figure 1 c shows the same explosive column 7 in a partially exploded view and Figure 1d shows explosive cartridges 5 and a detonator 4 for installation in the

Cartridges 6.

The explosive column 7 in this example comprises two nested cartridges 6, which are cylindrical and made of plastic. Before nesting, one or alternatively a plurality of shorter explosive cartridge / s 5 is inserted into each cartridge 6. In the inserted state, the explosive cartridges 5 abut against the bottom plate 14 of the cartridges 6.

Each cartridge 6 has an outer corrugation 10 at the bottom

Cartridge end 1 1 and an inner corrugation 12 at the top

 Cartridge end 13. When telescoping the outer cartridge is slightly widened by the inserted cartridge until the outer corrugation 10 of the inserted cartridge with the inner corrugation of the outer cartridge anchored. At the bottom is on the bottom cartridge 6 a

Sealing plug 9 is placed, which in the embodiment shown as

Expansion sleeve is formed. For anchoring, the sealing plug 9 has a inner corrugation 16, which wedges with the outer corrugation 10 of the adjacent cartridge 6.

In Figure 1 b, the lid 8 is shown with inserted detonator 4. The lid 8 closes the uppermost cartridge 6 and, like the cartridges 6 and the sealing plugs 9, is of cylindrical shape. The lid 8 has an externa ßere Riffelu ng 1 7, d he latched when you push the lid 8 i n the upper cartridge end 13 of a cartridge 6 with the inner corrugation 12 at the upper end cartridge 13. For receiving a detonator 4, the lid 8 has a firmly molded plastic sleeve 19 with a tip 1 8. When inserting the lid 8, the plastic sleeve 1 9 is pressed into the explosive explosive cartridges 5, whereby the detonator 4 also protrudes into the explosive.

For sealing, a seal 20 is arranged between each two latching corrugations 10, 12, 16, 17. FIG. 1 d shows the usual explosive cartridges 5. The reference numeral 1 shows extruded cartridges in the form of a sausage with closure clip 3 at each end in film tube. The reference numeral 2 denotes paper-wound cylindrical cartridges. Both cartridges 1, 2 are also referred to as cartridges explosives. In the figures 2 the assembly of the explosive column 7 is shown using the example of two different explosive cartridges 5.

FIG. 2 a shows a ready-to-use explosive column 7 using the example of a long explosive cartridge 5 with explosive filled in the film tube. FIG. 2b shows the same explosive column 7 in section. The used

Explosive cartridges 5 are identical to the explosive cartridges 1 of Figure 1 d. Like reference numerals in the figures show like objects. FIG. 2c shows a ready-to-use explosive column 7 using the example of a short explosive cartridge 5 with explosive wrapped in paper. FIG. 2d shows the same explosive column 7 in section. The explosive cartridges 5 used are identical to the explosive cartridges 2 of Figure 1d. Same

Reference numerals in the figures show like objects.

FIG. 2e shows the detail Y from FIG. 2d, and FIG. 2f shows the detail X from FIG. 2d. In both figures, the locking over the corrugations and the sealing over the seals 20 is well shown. Figure 2f also shows the

Vent hole 15 in the bottom plate 14. For better retention of the seals 20, the corrugations at the points of the seal 20 are adapted to this, for example by an increase in space.

Claims

claims 1 . Cartridge system, for use in blasting, for explosive tests, containing cartridges (6) containing explosives, fasteners for interconnecting at their lower and upper ends, and for producing an explosive column (7) at the top End a lid (8) for receiving a detonator (4) and at the lower end of a sealing plug (9) is arranged, characterized in that each cartridge (6) has an outer corrugation (10) and an inner corrugation (12) and the cartridges (6) telescope into each other, the lower end of the cartridge (11) one Cartridge (6) in the upper cartridge end (13) of another cartridge (6) or vice versa inserted and both cartridges (6) by locking the outer corrugation (10) of a cartridge (6) with the inner corrugation (12) of the other Cartridge (6) are connected. 2. cartridge system according to claim 1, characterized in that all the cartridges (6) at its lower cartridge end (1 1) via a bottom plate (14) are closed, wherein in the bottom plate (14) preferably a vent opening (15) is arranged. 3. cartridge system according to claim 1 or 2, characterized in that the corrugations (10, 12) are preferably formed radially circumferentially or spirally. 4. cartridge system according to one of claims 1 to 3, characterized in that the outer corrugation (10) extends over a smaller length of the cartridge (6) than the inner corrugation (12). 5. cartridge system according to one of claims 1 to 4, characterized in that extending the inner corrugation (10) over half the length of the cartridge (6). 6. cartridge system according to one of claims 1 to 5, characterized in that the sealing plug (9) with an inner corrugation (16) are provided and when pushing the sealing plug (9) on a cartridge (6), the outer corrugation (10) of a cartridge (6) with the inner corrugation (16) of the sealing plug (9) locked. 7. cartridge system according to one of claims 1 to 6, characterized in that the cover (8) has an outer corrugation (17) which upon insertion of the lid (8) in a cartridge (6) with the inner corrugation (12) latched to the cartridge (6). 8. cartridge system according to one of claims 1 to 7, characterized in that the cover (8) has a plastic sleeve (19) for receiving a detonator (4). 9. cartridge system according to one of claims 1 to 8, characterized in that the cover (8) has a firmly molded plastic sleeve (19) with an integrated tip (18) for receiving a detonator (4). 10. cartridge system according to one of claims 1 to 9, characterized in that for sealing between two latching corrugations (10, 12, 16, 17) a seal (20) is arranged. 11. A method for assembling an explosive column 7 with a cartridge system according to one of claims 1 to 10, characterized in that during the assembly process of the lid (8) with the Cartridge (6) the plastic sleeve (19) with the integrated tip (18) in the explosive cartridge (5) pierces and with its uber overwhelm ing length in the explosive of the explosive cartridge (5) immersed. 12. The method according to claim 1 1, characterized in that the detonator (4) is inserted into the plastic sleeve (19). 13. The method of claim 1 1 or 12, characterized in that in the bottom cartridge (6) an explosive cartridge (5) is inserted and then either the lid (8) inserted or a second cartridge (6) with it already ei ng eschobener Explosive cartridge (5) is inserted until the lower end of the cartridge (1 1) of the second Cartridge (6) on the upper end of the explosive cartridge (5) in the bottom cartridge (6) is seated. 14. The method according to any one of claims 1 1 to 13, characterized in that on the u iessteste Ka rtu cal (6) at its lower end a closure plug (9) is pushed and in the topmost cartridge (6) at their upper end (13) a lid (8) is inserted. 15. The method according to any one of claims 1 1 to 14, characterized in that cartridges (6), cover (8) and sealing plug (9) without explosive cartridges (5) are sent to a site and there with explosive cartridges (5) and detonators ( 4) an operational ready Explosive column (7) is created.