DE102014109707A1 - Holder for core tubes - Google Patents

Abstract

The present invention relates to a mounting device comprising a hollow cylindrical base body, on whose top surface a locking disc connects and two brackets which are attached to the opposite end of the body and together form a ring in a closed position, which rests on the base of the body and wherein the main body has at least one O-ring for sealing on its inside. The present invention also relates to a sediment core device comprising such a holding device.

Description

State of the art

The invention is in the field of sediment sampling devices.

One common method of pulling sediment cores is by using core tubes that are drilled or hammered into the sediment. The sediment sample is then transported to the surface in the core tube. The samples are usually stored and transported in the core tube. In a multiple sampling therefore several core tubes are necessary. Replaceable core tubes are therefore often used, which are released after sampling by the sediment core device.

A challenge with this type of exchangeable core tube is to create a stable and tight connection between core tube and core device that can withstand the pressures and stresses.

For the removal of sediment cores usually exchangeable core tubes are attached in the core device, brought to the impact in the bottom of the water and pulled back with the device back to the surface. The sediment remains in the core tube when pulling up and pulling up when no water can flow from the top into the core tube and occupy the space of the sediment. So that no water can flow into the core tube, a watertight closure is produced by the core device. The connection between the core tube and the core device must be strong enough so that it does not come loose when pulled out against high frictional forces between the core tube and the surrounding sediment, otherwise the core tube with sample remains stuck in the sediment

Methods of sediment sampling with core devices using acrylic tubes as core tubes are known. The devices are designed so that the replaceable core tubes with threads, crimp, clamps or screws are attached to the core device. The sampling is error-prone by this construction, consuming to operate and consuming or expensive.

From the US 3299969 A are known as sediment corer or gravity. In these gravity cores, plastic tubes without enveloping steel tubes are used as core tubes. The connection between core device and core tube is realized by a clamp with special grooves. The core tube has an additional head made of metal at the lower end.

In the DE 4318347 are described arrangements and devices of a multi-unit for core drilling in water bodies with exchangeable core tubes.

In the DE 10346351 describes a single-tube core device with exchangeable core tubes. The coupling between tube and core device is realized here via a clamping with different clamping rings, wherein different threads are used.

The sampling often takes place in remote regions. Since it is common in such sampling to take many samples in one go and the core tubes are occasionally lost or destroyed, they should be inexpensive and easy to procure. It is therefore desirable that the core tubes have no special dimensions, threads or attachments that can not be produced on site.

In order for the pipes to be easily and quickly changed even under adverse conditions, the pipe holding mechanism on the core tool should be easy to operate, impervious to dirt and yet tightly sealed.

In the prior art, no "quick release" is known, with the core tubes can be attached to a sediment core device and would allow easy replacement of the core tubes.

Another fundamental problem in the prior art is that special core tubes must be used for each core device as they are threaded, for example. This makes it necessary to use matching core tubes, which are usually expensive to buy. In addition, the availability of special core tubes may be poor depending on the region and possibly necessary replacement procurement impossible. Securing against resulting failures requires considerable logistical and financial overhead.

The present invention is therefore based on the object to provide a mounting device in the form of a quick release, with which a core tube can be connected in a simple, safe and sealed manner with a core device. It should be both a quick and easy closing and releasing possible without that it comes to the disadvantages of the prior art.

Description of the invention

This object is achieved by the independent claims of the present application. Preferred embodiments are described in the subclaims.

In a first preferred embodiment, the invention relates to a holding device comprising a base body in the form of a hollow cylinder, on whose top surface a locking disc connects, comprising a round disc with a concentric round opening and at the end facing the base two brackets are mounted, these brackets folded down are and in a closed position together form a ring which rests on the base of the body and wherein the body has on its inner side over at least one O-ring for sealing.

The holding device preferably serves as a quick-acting closure via which a core tube can be connected to a sediment core device. It is particularly preferred that a sediment core device is connected to the locking disc of the mounting device. The connection between the sediment core device and the locking disc can preferably be screwed. However, other compounds are possible, which can be implemented by a person skilled in the art without being inventive.

It is also preferred that the diameter of the round opening of the locking disc corresponds to the inner diameter of the base body.

The holder device is preferably used for connecting core tubes to a core device. This makes it possible to use exchangeable core tubes with the same core device. By the support device of the invention, the core tube air-tight and waterproof with the core device sufficiently firmly connected so that it does not get stuck in the sediment after impact in the water bottom and pulling out. The mounting device is easy to use and insensitive to contamination, which can occur, for example, when driving into the sediment. This is achieved by a particularly simple and dirt-resistant mechanism that dispenses with fine threads and clamps.

It is preferred that the core tube is at least partially enclosed by the mounting device and is fixed on the bracket in the closed position on the mounting device.

The brackets are preferably substantially semicircular in shape and together form a circular ring in a closed position. The ring encloses an inserted core tube without squeezing it radially. He preferably engages positively under a firmly connected to the core tube ring, which increases in a suitable range, the core tube diameter to a desired level. The tensile forces when pulling out and pulling up the core device are transmitted from the temples on this ring on the core tube. The operation of such a closure mechanism is cheaper, more flexible and easier and more reliable possible due to the new design of the mounting device even under adverse conditions.

The inventive combination of holder and seal has surprisingly a simplification of handling and reducing the susceptibility to failure of sediment core devices result. In addition, a cost reduction in sediment sampling is achieved by the possibility of using simpler tubes.

The invention thus makes it possible to exchange the core tubes particularly quickly. This is a huge advantage as it is desirable to shorten this process in terms of expensive ship times.

It is also advantageous to use the bracket as a solid connection with the core tube when pulling out the device. These brackets are not susceptible to contamination and thus clearly superior thread connections from the prior art. The cleaning and maintenance effort is significantly minimized.

A special feature of the device of the invention lies in the fact that it is possible for the first time to use different tubes, regardless of manufacturer and material, with a suitable diameter with a specific core device. As a result, the core tubes no longer have to be purchased directly from the manufacturer of the devices, which is often expensive and expensive. To pull cores of different diameters, the same core device can be used for the first time, in which only the holder must be replaced according to the desired diameter.

The invention is thus preferably provided for such core devices, in which exchangeable core tubes, particularly preferably acrylic tubes, are used.

It is particularly preferred that the core tube is not housed and fixed as a liner in a steel tube. Such core devices are known in the art, but usually complicated to use and have a dirt-sensitive mechanism. The core tube is from the outside clamped, which can lead to deformations in the core tube and thereby leakage problems when sealing the core tubes. These disadvantages are also overcome by the present invention. Contamination can also lead to difficulties in releasing the core tube, which also causes damage to the support devices. For this reason, the retainer device of the invention is particularly advantageous because soiling can not easily settle in the closure mechanism. The opening and closing of the bracket is therefore not limited at any time.

The present invention is characterized in particular by the fact that under a suitable distance at the upper end of the core tube (the core device end facing) mounted ring two opposite bracket (also called gripper) folded and positively fixed under the ring. It is particularly preferred that the ring is glued to the outside of the core tube. It has proved to be particularly advantageous that the ring is cut or sawed off from one of the two ends of the core tube and is opened or sawed through a cut so that it can be placed around the core tube outside and secured. The attachment is particularly preferably by an adhesive bond. This embodiment is particularly advantageous because it can be used commercially available core tubes, which is a particularly cost-effective alternative to the prior art. Conventional core tubes can be modified by simply cutting off a narrow ring and adhering the same so that they can be connected to a core device with the retention device of the invention. This modification can also be carried out shortly before commissioning of the core tube, so that the user can produce the tubes at any time.

However, other types of modification of conventional core tubes are also conceivable. For example, can be glued individual sections of the ring or special rings or their sections that have not been sawn from the core tube. Even such modifications can lead to a positive connection between the holding device and the core tube.

It is particularly preferred that the brackets rest in the closed position on the lower edge of the hollow cylinder. It is advantageous if the bracket in the closed position form a circular ring whose dimensions are designed so that it engages positively under almost the entire surface of the glued ring, wherein the inner diameter is large enough not to squeeze the core tube itself radially , Advantageously, the inner diameter is smaller than the inner diameter of the base surface of the hollow cylinder. This makes it possible to fix the glued ring on the outside of the hollow cylinder particularly firmly by the bracket, so that the core tube can not slip down from the mounting device.

In a particularly advantageous embodiment of the invention, the inner diameter of the base body is greatest at the point at which the glued or otherwise applied ring or a comparable structure of the core tube is located.

It is particularly preferred that each bracket is attached via a fastening device on the outside of the main body. It is particularly preferred that the fastening device is a hinge. There are also known other fastening devices with which the bracket can be attached to the main body of the mounting device. It is important that the bracket can be folded from an open to a closed position. D. h., The bracket must be movably attached to the body. By this type of attachment a quick opening and closing of the mounting device is possible, so that the core tubes can be replaced very quickly.

It is also preferred that the brackets each comprise at least one tab. This embodiment makes a particularly simple operability of the mounting device possible. However, it is particularly preferred that each bracket comprises at least two tabs. As a result, a particularly stable and secure attachment of the bracket in the closed position is possible.

It is particularly preferred that the straps are fixed in the closed position. By a suitable fixation in the closed position prevents the strap unintentionally move from the closed to the open state. This ensures that the core tube can not prematurely detach from the mounting device. By this embodiment, it is possible to use the sampling device in different sediments, since the holder can withstand the particular pressures and stresses. It is thus possible to study both seabeds, deep seabeds or seabeds under thick layers of ice.

In a further preferred embodiment, the base body comprises at least one fastening attachment on the outer surface of the hollow cylinder. The mounting attachment is preferably used to fix the bracket in the closed position. In this case, the tabs of the Bracket connected to the respective attachment.

The attachment attachment is preferably a nearly parallelepiped or cylindrical body which has a concentric opening.

The fixation in the closed position is preferably done by pins. Depending on the attachment, however, other types of fixation are possible. It is preferred that at least one pin connects a tab of a strap with a mounting attachment and / or that a pin each connects a tab of the two brackets together. The connection of the two tabs is preferably in the form that the mounting attachment is between the two tabs and a pin is pushed through the openings of the tab of the first bracket, the mounting bracket and the tab of the second bracket.

It is further preferred that the tabs and / or attachment attachments are designed so that self-locking parts, preferably spring pin or chuck can be used as a pin. One skilled in the art knows how to design the tabs or mounting tabs so that these preferred pins can be used without being self-inventive. This type of pins leads to a particularly stable fixation which can still be solved easily and quickly.

In a further preferred embodiment, the brackets comprise at least one resilient attachment. It is preferred that the resilient attachment replaces the tab for connection to the mounting attachment. It is particularly preferred that the resilient attachment of the bracket engages in the closed position in the base body, preferably the attachment attachment.

It is also particularly preferred that the main body has on its inside over two O-rings for sealing. Through the use of two O-rings, the core tube can be connected to the core device in a particularly air-tight and watertight manner and is also optimally fixed in position and orientation in the holder.

It is particularly preferred that a core tube is connected to the mounting device. It is advantageous that core tubes with an outer diameter of 60 mm to 100 mm, preferably 80 mm are used. For the use of such core tubes, a main body with locking disc in the amount of 80 mm to 120 mm, preferably 100 mm is particularly suitable. The outer diameter of the locking disk in this case is preferably 140 mm to 180 mm, particularly preferably 160 mm, while the locking disk is preferably 2 mm to 7 mm, preferably 5 mm thick. The outer diameter of the main body in this embodiment is preferably 80 mm to 110 mm, in particular 97 mm. The bore diameter for pins in the tab is preferably 4 mm to 7 mm, particularly preferably 5.5 mm. The groove width for the O-rings is preferably 4 mm to 10 mm. 4.8 mm or 7.2 mm have proven particularly advantageous.

The O-rings used are chosen according to the outer diameter of the core tubes used. The groove width and other dimensions of the body are adapted to this. For a core tube with an outer diameter of 80 mm, an O-ring with a 78.97 mm inner diameter under 3.53 mm cord thickness (O-ring 78.97 × 3.53 mm) is preferred. Also preferred are O-rings 78.7 × 5.33 mm in configuration. O-rings with large cord thickness are particularly advantageous because they allow greater tolerances for dimensional and form deviations in the core tube diameter. In the case of the groove diameter, taking into account such dimensional and form deviations, it is necessary to find a compromise between tightness and ease of movement when inserting the core tubes. Particularly advantageous has a measure according to the formula groove diameter ≈ core tube diameter + 1.75 · cord strength O-ring proved.

It is particularly preferred for the base body and / or the brackets to consist of and / or comprise seawater-resistant aluminum alloys. Particularly preferred here is AlMg4.5Mn. This alloy suitably combines corrosion, strength and processing properties with a low weight.

In a further preferred embodiment, the invention relates to a sediment core device comprising one of the support devices described. Such a sediment core device is particularly advantageous because it can be used with a variety of different core tubes. As a result, a more cost-effective sampling is possible than previously described in the prior art. However, not only the cost is reduced by the invention; At the same time the problem of availability of special core tubes is solved. Since sampling is often done in remote regions, it is often not possible to have core tubes delivered at short notice. Therefore, it is particularly helpful that different core tubes can be adapted by simple modification so that they can be connected via the mounting device of the invention with a core device. Thus, the availability of special core tubes plays no big Role more for sampling using the fixture device of the invention.

Examples and figures

In the following, the invention is illustrated by means of examples and figures, but without being limited to these specific embodiments.

example 1

An advantageous mounting device has the following configuration:
Core tubes with an outer diameter: 80 mm
Height of base body with locking disc: 100 mm
Outer diameter of the locking disc: 160 mm
Thickness of the locking disc: 5 mm
Outer diameter of the main body: 97 mm
Bore diameter for pins in the tab: 5.5 mm
Groove width for the O-rings: 7.2 mm
Groove diameter for the O-rings: 89.4 mm
Configuration O-rings: 78.7 × 5.33 mm.

1 shows a preferred support device with basic body and two straps in the open position.

2 shows a preferred bracket with brackets in the closed position, which are fixed by a pin.

3 shows a preferred bracket, include two tabs and a hinge.

4 shows a preferred body with attachment, hinge and locking disc.

5 shows a preferred body in cross section, wherein the O-rings can be seen.

6 shows in Figure a) a core tube with attached outer ring. Figure b) shows the attachment of the (shortened) core tube to the mounting device according to the invention as a sectional view

LIST OF REFERENCE NUMBERS

1

 body

2

 hanger

3

 pen

4

 flap

5

 Hinge attachment bracket

6

 securing cap

7

 Hinge attachment basic body

8th

 locking disc

9

 Groove for O-ring

10

 O-ring

11

 core tube

12

 outer ring

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 3299969A [0006]
• DE 4318347 [0007]
• DE 10346351 [0008]

Claims (17)

Mounting device comprising • a basic body in the form of a hollow cylinder • Connected to the top surface of a locking disc, comprising a round disc with a concentric round opening and • At the base facing the end of two brackets are mounted, these brackets are folded and together form a ring in a closed position, which rests on the base of the Grundköpers and wherein the body has on its inside over at least one O-ring for sealing , Mounting device according to claim 1, wherein each bracket is attached via a fastening device on the outside of the base body. A mounting device according to claim 2, wherein the fastening device is a hinge. Mounting device according to at least one of the preceding claims, wherein the bracket each comprise at least one, preferably two tabs. Mounting device according to at least one of the preceding claims, wherein the base body comprises at least one mounting attachment on the outer surface of the hollow cylinder. Mounting device according to at least one of the preceding claims, wherein the straps are fixed in the closed position. Mounting device according to the preceding claim, wherein the straps are fixed in the closed position by pins. A mounting device according to the preceding claim, wherein at least one pin connects at least one tab of a bracket with a mounting attachment. Mounting device according to at least one of claims 7 or 8, wherein each pin connects one tab of the two brackets together. Retaining device according to at least one of the preceding claims, wherein tabs and fastening attachments are designed so that self-locking parts, preferably spring plugs or folding splint can be used as a pin. Mounting device according to at least one of the preceding claims, wherein the bracket comprise at least one resilient attachment. Mounting device according to the preceding claim, wherein the resilient attachment of the bracket engages in the closed position in the base body and / or the mounting attachment. Mounting device according to at least one of the preceding claims, wherein the base body has on its inside over two O-rings for sealing. Mounting device according to at least one of the preceding claims, wherein a sediment core device is connected to the locking disc of the mounting device. Mounting device according to at least one of the preceding claims, wherein a core tube is connected to the mounting device. Mounting device according to the preceding claim, wherein the core tube is at least partially enclosed by the mounting device and is fixed on the bracket in the closed position on the mounting device. Sediment core device comprising a mounting device according to at least one of the preceding claims.

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