KR101170315B1 - Positioning device for a rod-shaped measuring apparatus - Google Patents

Abstract

The present invention relates to a positioning device for a measuring device. It is an object of the present invention to provide a known positioning device, for example in such a way as to enable the use of a rod-shaped measuring device having a single length for measuring points located at various depths in an object such as a continuous casting die. The present invention is directed to improving a crystal device. This object is provided according to the invention in which a sleeve is provided, which sleeve is connected in the axial extension to an end of the cylindrical guide member spaced apart from the object, and also within the sleeve the spring member and the measuring device are likewise guided, And a second stop for the spring member is achieved by being able to be axially displaced and fixed beyond the one of the ends of the cylindrical guide member spaced apart from the object by the sleeve.

Continuous casting dies, measuring points, rod measuring devices, cylindrical guide members, spring members, sleeves, positioning devices.

Description

Positioning device for bar measuring device {POSITIONING DEVICE FOR A ROD-SHAPED MEASURING APPARATUS}

The present invention relates to a rod-shaped measuring device, for example a positioning device for a thermocouple, for measuring a measured value at a measuring point of an object such as a continuous casting die.

Such a positioning device is known, for example, from US patent publication US 3,745,828. The positioning device according to the US publication is mounted on the outer wall portion of the double wall die. Cooling liquid is located between the two die walls. In this respect, the aforementioned outer wall portion of the die is likened to the wall portion of the water tank seated on the back of the die of a single wall. According to the US publication, the positioning device includes a cylindrical housing / guide member that is firmly fixed to the outer wall portion. The temperature measuring device is guided through the cylindrical housing and the cooling liquid to a measuring position located inside the first wall portion of the die. The cylindrical housing / guide member not only guides the thermocouple, but also serves to guide the spring member which is formed as a compression spring and which is fixed between the two stops. One stop is firmly coupled to the thermocouple, while the other stop is tightly fitted spatially to the cylindrical housing. In this structure, the compression spring is supported by the second stop or the cylindrical housing, bringing the thermocouple close to the measurement position in the preload state.

The preloads described above may, for example, have relatively low precision in the bore hole at the back of the first die wall, or when the essentially constant spacing between the inner die wall and the outer die wall must be enlarged due to thermal effects. Even under the same unfavorable environmental conditions, it provides excellent contact with the thermocouple. The spring path of the compression spring is usually only a few millimeters, and therefore only suitable for compensating for relatively low precision.

In practice, however, the bore holes for the measurement positions in the back of the die are different in depth. For example, the bore hole depth can vary between 10 and 60 mm. The known positioning device described above is not suitable for compensating such a wide variety of bore hole depths based on their relatively short self-spring paths. As a result, suppliers must stock various thermocouples of different lengths, each corresponding to a different bore hole depth. In assembly, numerous thermocouples of varying lengths, often showing only a few millimeters in length difference, can lead to confusion and assembly errors, which often results in measurement errors.

It is an object of the present invention to use a known measuring device provided for a bar measuring device, for example, the use of a bar measuring device having a single length for measuring points located at various depths in an object such as a continuous casting die. It is to improve the positioning device in such a way that it is possible.

This object is achieved by the subject matter of claim 1. The object of claim 1 is provided with a sleeve, which sleeve is connected at an axial extension to one of the ends of the cylindrical guide member spaced apart from the object, and also within the sleeve the guide member and the measuring device are likewise guided, and The second stop for the spring member is characterized in that it can be axially displaced and fixed beyond the one of the ends of the cylindrical guide member spaced apart from the object by the sleeve.

The sleeve provided according to the invention preferably enables displacement of the second stop for the spring member in the axial direction of the cylindrical guide member according to the respective depth of the bore hole into which each rod-shaped measuring device is to be inserted. Thus, based on the possibility for the axial displacement of the second stop for the spring member, for each bore hole in the die rear wall part, measuring devices of the same length can be used, irrespective of the respective depth of the bore hole. have. Thus, there is no longer a risk of confusion that arises when fitting individual measuring devices of various lengths into certain bore holes. In addition, through the displacement of the second stop, even with only measuring devices, preferably with a single length, the correct preload can always be set according to each individual bore hole depth individually. In this case, therefore, the required contact between the tip of the measuring device and the measuring point inside the die is also guaranteed. Depending on the alternative to the use of measuring devices having only a single length, it is obvious that measuring devices having various standard lengths are also available.

By way of example, the sleeve is connected to the cylindrical guide member via the first threaded portion. By the first screw portion, the length of the end of the cylindrical guide member that protrudes more than the end spaced from the object can be variably adjusted. In this regard, it is also possible to use the first threaded portion to change or adjust the path length that allows the second stop to be axially displaced and fixed beyond the end of the cylindrical guide member spaced apart from the object. According to an alternative embodiment, the sleeve may also be connected to the cylindrical guide member via the bayonet fitting. The bayonet fitting does not include contaminant-causing threads, which may be exposed to corrosive environments during operation of the die, and has the advantage of allowing assembly and disassembly of the guide member and thermocouple directly by hand without tools. The bayonet fittings may also be formed as multiple finger / groove units. As a further alternative embodiment, the sleeve may also be firmly coupled to the guide member, for example by welding, or may be integrally formed with the guide member.

The second stop is formed in the present invention as a disc shaped opening plate with a central opening. The opening serves to pass the rod-shaped measuring device or to pass the cable of the measuring device. Outside the opening, the opening plate is used as a stop for the spring member.

According to the first embodiment, two noses are formed in the opening plate opposite each other. These noses are guided in the slots of the sleeve. The opening plate can be positioned axially by means of a nut which engages with the second thread of the sleeve provided with the slot and acts on the opening plate through the noses.

According to a second alternative alternative, the opening plate itself is formed as a lock bush which can be fixed on one of the ends of the sleeve spaced apart from the object, preferably as a union nut. The thread length of the union nut provides additional possibilities for variable adjustment of the path length, providing a range in which the second stop can be axially displaced and fixed beyond the end of the cylindrical guide member spaced apart from the object. According to an alternative embodiment, the lock bush may also be fixed to the sleeve with a bayonet fitting, where the advantages already mentioned for the bayonet fitting may equally apply.

According to the above two embodiments, the rod-shaped temperature measuring device may include a clamp cap for bending the cable of the measuring device outside the opening plate, for example by 90 degrees, at its end spaced from the object. In this case, the overall required structure depth can be further shortened, thus freeing up additional space for the spring path extension.

Furthermore, the outer skin of the rod-shaped measuring device is preferably reinforced, for example in the region of the spring member and / or in the opening region of the opening plate. This is because, by this reinforcement, the risk of damage or bending of the measuring device or its cable, which can occur differently than intended in the working region of the spring member or the opening plate, is prevented.

In addition, as an advantage, it has been found that the sleeve according to the invention can be simply mounted in an existing die system, whereby the advantages described above can also be realized in such an existing system.

In the case of the positioning device according to the invention, the spring member is mounted inside the cylindrical guide member and the sleeve, the sleeve being closed by a second stop in particular in the form of a lock bush. In this way the spring member is preferably protected from the action of undesired surroundings such as contaminants, water vapor and the shell hardened by the cast powder, in particular from corrosion. Furthermore, for corrosion protection, the positioning device or its components, in particular the spring member, is made of a corrosion resistant material, such as stainless steel, copper or the like, or has a suitable corrosion protection layer.

A total of eight figures are attached to this specification.

1 is a schematic view showing a positioning device of the present application according to the first embodiment.

2 is a schematic view showing a sleeve of the present application according to the second embodiment.

3 is a schematic view showing an opening plate formed as a second stop for the spring member according to the first embodiment.

4 is a perspective view showing a positioning device according to the first embodiment.

5a) to 5c) are cross-sectional views schematically illustrating the cutaway positioning system of the present application according to the second embodiment, each assembled or unassembled under various preload conditions.

6A) and 6B) are cross-sectional views schematically illustrating the cutaway positioning device of the present application according to the second embodiment with a first form for 30 mm compensation.

7a) and 7b) are cross-sectional views schematically illustrating the cutaway positioning device of the present application according to the second embodiment with a second form for 30 mm compensation.

The invention is explained in detail in connection with the figures described above in the following. In all figures, the same mechanical member is indicated by the same member number.

The two embodiments introduced below in connection with the present invention displace the second stop for the guide member beyond one of the two cores of the present invention, the end of the cylindrical guide member formed in the form of an expansion bolt, the end spaced from the die. Realize the point of fixing. These two embodiments differ only in terms of the structure of the second stop 132 and the sleeve 130.

First, a first embodiment relating to FIGS. 1 to 4 will be described below.

1 shows a cross-sectional view of an object 300 in the form of a continuous casting die. The continuous casting die is screwed into a water tank (not shown) through a cylindrical guide member 110 whose back is formed in the form of an expansion bolt. The expansion bolt 110 has a longitudinal bore, through which the rod-shaped measuring device 200, for example a temperature measuring device, in a further example a thermocouple type measuring device, is discharged from the back of the water tank and is continuous. Guided into the bore portion formed on the back side of the casting die. The die side end of the rod-shaped measuring device 200 implemented with a thermocouple contacts the measuring point M in the guided bore portion. The backside of the object 300 embodied in the form of a continuous casting die is typically arranged with a number of measuring points located at various depths. The expansion bolt 110 is not only firmly screwed into the wall of the water tank, but also firmly screwed into the back of the die, and in this respect it is firmly and spatially fit to the die. In addition, one of the ends of the expansion bolt, which is spaced apart from the die, has a bore portion for receiving a spring member 120 guided coaxially with respect to the thermocouple and a first stop 210 rigidly coupled with the thermocouple. The spring member is here formed, for example, as a compression spring and is in close contact with the first stop 210.

According to the invention the sleeve 130 is connected to one of the ends of the expansion bolts 110 in the axial extension in a detachable or permanently fixed manner, the end of which is spaced from the die. In the case of detachable engagement, the head 130-1 of the sleeve 130 is formed as a clamping member, preferably as a bayonet joint, or has a female thread as shown in FIG. 1. As such, the sleeve 130 may optionally be sealed with, for example, a ring seal 131 opposite one of the ends of the expansion bolt 110 spaced from the die. In the case of realizing permanent engagement, the sleeve is for example formed integrally with the cylindrical guide member or welded with the guide member.

The sleeve of the present application according to the first embodiment is shown in FIG. 2. As can be seen from FIG. 2, the sleeve includes the head 130-1 described above, to which the cylindrical body is connected.

For the first embodiment, the second stop 132 is formed as an opening plate 132 'with two noses 136', 136 "(see Figure 3). Sleeve 130 is slot 135 The opening plate 132 ′ may be axially displaced within the sleeve, while the noses 136 ′, 136 ″ are guided in the slot 135. The position of the second stop, which is formed in the form of an opening plate 132 ', can be arbitrarily adjusted within the sleeve. This adjustment is made by a threaded nut 138 that engages the male threaded portion 137 provided on the sleeve 130. The threaded nut 138 directly affects the opening plate through the washers 139 and the noses 136 ', 136 "in an ideal manner. During each adjustment process, the rod-shaped measuring device 200 is a continuous casting die. It is supported at the measuring point M inside the object 300, and at the same time, the thermocouple is brought into close contact with the measuring point M through the spring member 120 and the first stop 210. Further, the nut with nut 138 By rotating), it is possible to suitably adjust each of the desired preloads used for bringing the thermocouple into close contact with the measuring point for various bore hole depths T, thereby ensuring a reliable contact.

4 shows a positioning device according to the invention shown in FIG. 1 in a perspective view.

In the second embodiment, the sleeve 130 is also referred to as a threaded nipple and typically does not have a slot, but even if there is a slot, it may not cause damage. Unlike the first embodiment, the second stop is formed as a locking bush in the form of an opening plate 132 ", preferably as a threaded nut, which opening plate is formed at one of the ends of the sleeve 130 spaced apart from the object. (See Figs. 5A to 5C).) According to an alternative embodiment, the lock bush may also be secured to a bayonet fitting at one of the ends of the sleeve 130 spaced apart from the object. In the case of two alternative embodiments, the removable lock bush is preferably sealed against the sleeve by an O-ring.

FIG. 5A shows the positioning device of the present application according to a second embodiment comprising a sleeve 13 or a threaded nipple screwed into an end of the expansion bolt 110 spaced from an object. However, in the case of Fig. 5A, the lock bush 132 "is not assembled. The rod measuring device 200 is adjacent to the measurement position M inside the die and protrudes more than the sleeve 130 without being preloaded. At the end of the rod-shaped measuring device 200, which is spaced apart from the object, the rod-shaped measuring device 200 is guided inside the threaded nut 132 ″ through the opening, and the cable with which the temperature measuring device is drawn ( 28 is curved by clamp cap 27. Inside the sleeve 130 and the threaded nut 132 ″, there is a spring between the first stop 210 that is firmly coupled to the rod-shaped measuring device 200 and the second stop formed by the threaded nut. The member 120 is interposed, but in the case of Fig. 5A, the spring member is not preloaded.

Figure 5b) shows essentially the same configuration as Figure 5a) except that the threaded nut 132 "is screwed onto the sleeve 130. The threaded nut 132" refers to As it functions as a second stop for the spring member 120 as described above, the spring path of the spring member is shortened only by tightening the threaded nut, whereby the rod-shaped measuring device 200 measures the measuring point in a weak preload state. It sticks toward (M) side. This preload ensures that there is always contact between the measuring point side end of the temperature measuring device and the measuring point.

Fig. 5c) shows the positioning device of the present application according to the second embodiment which is in the same assembled state as in Fig. 5b), but in this case the measuring position M inside the die is at a higher position by 15 mm. It is located. This is because when using the same sleeve 130 and the same threaded nut 132 ″, the first stop 210 is moved with the rod-shaped measuring device 200 in the direction of the second stop, in this case a spring member. There is an effect that the maximum compression of and therefore the maximum preload for the thermocouple is provided: The different positions of the measuring position M in both Figures 5b) and 5c) are compensated only by the reduction of the spring path in the case of Figure 5c). If the spring member is thereby completely compressed as shown in Fig. 5c), the spring member loses its elastic force, which is usually undesirable.

FIG. 6 illustrates the possibility to prevent complete compression or failure of the spring member even when the height / depth difference between two different measurement positions within the die is relatively larger. For this purpose the sleeve of FIG. 6b) is formed longer, for example, by half the height difference Δh than the sleeve in FIG. 6a). At the same time, the spring path formed between the first stop 210 and the second stop in the form of a threaded nut 132 "according to Figure 6b) is shortened by half compared to Figure 6a. 6b enlarges the preload of the rod-shaped measuring device 200 with respect to the measuring position M2, ie the changed spring ratio is 2: 1, but the spring member in FIG. 6b) is not fully compressed, Thereby the spring member can still be responsive if necessary.

Figure 7 shows a further form of the second embodiment. In this case, the height difference Δh between the measurement positions M2 and M1 inside the die is similar to that in FIG. 5, in the form of a first stop 210 and a threaded nut 132 ″. Only the spring path between the two stops is compensated by a corresponding shortening. The length of the sleeve 130 and the position of the threaded threaded nut 132 ″ remain unchanged in Figs. 7a) and 7b). It stays the same. The spring ratio changed between these two degrees is set to 3.5: 1.

In the two embodiments of the present invention, the second stop 132 is formed in the form of a disc-shaped opening plate or in the form of a threaded nut with a central opening 133. The rod-shaped measuring device 200 or its cable 28 is guided through the central opening.

In the two embodiments according to the present invention, the outer skin, or thermocouple itself, of the rod-shaped measuring device 200, preferably implemented with a thermocouple, can prevent wear of the insulation in the form of an outer skin and consequently a possible malfunction of the thermocouple. So that in the region of the spring member acting as a compression spring, it is formed in a reinforced manner, preferably in a non-buckled manner.

For both embodiments according to the present invention, the thermocouple may comprise a clamp cap 27 for bending the thermocouple withdrawn cable 28 outside the second stop or opening plate at its end spaced from the die. have.

For both embodiments, the length of the sleeve should be chosen to allow spring paths of 5-60 mm bandwidth. This bandwidth is a standard value suitable for using the present invention in the area of continuous casting dies.

Claims (12)

As the positioning device 100 for the rod-shaped measuring device 200 for measuring the measured value at the measuring point M of the object 300, A cylindrical guide member 110 fitted to the object 300 and guiding the rod-shaped measuring device 200 to contact the measurement point M; A spring member mounted between the first stop 210 and the second stop 132 connected to the bar measuring device 200 to closely contact the bar measuring device with the measuring point M. In the positioning device 100 for the rod-shaped measuring device 200 comprising a 120, A sleeve 130 is provided, the sleeve being connected to one of the ends of the cylindrical guide member 110 at an axial extension away from the object, the spring member 120 and the inside of the sleeve 130. The bar measuring device 200 is guided, The second stop 132 in contact with the spring member 120 may be axially displaced and fixed beyond an end of the cylindrical guide member 110 spaced from an object by the sleeve 130. Positioning device 100 for the rod-shaped measuring device 200, characterized in that. The rod-shaped measuring device of claim 1, wherein the sleeve 130 is connected to the cylindrical guide member through a first threaded portion 134 or a bayonet fitting, or is integrally formed with the guide member. Positioning device 100). The method of claim 1 or 2, wherein the second stop portion 132 is formed in the form of a disc shaped opening plate 132 'having a central opening 133, the rod-shaped measuring device 200 Positioning device (100) for the rod-shaped measuring device (200), characterized in that passing through the center opening (133). 4. The sleeve (130) of claim 3 wherein the sleeve (130) has at least one slot (135), and the opening plate (132 ') has at least one nose (136', 136 ") guided within the slot. Positioning device 100 for a rod-shaped measuring device 200, characterized in that it comprises. 5. The sleeve (130) of claim 4, wherein said sleeve (130) with a slot includes a second threaded portion (137), and said opening plate (132 ') engages said second threaded portion (137) and said nose (136'). , 136 "through a nut (138) acting on said opening plate (132 '), which can be positioned in the axial direction. 4. The rod of claim 3, wherein the second stop 132 is formed as a lock bush in the form of an opening plate, which lock bush can be fixed to an end of the sleeve that is spaced apart from an object. Positioning device 100 for measuring device 200. The cylindrical guide member 110 is a cylindrical expansion bolt, characterized in that the object 300 in the form of a continuous casting die is screwed to the water tank by the expansion bolt. Positioning device 100 for rod-shaped measuring device 200. 3. The positioning device 100 according to claim 1 or 2, wherein the rod-shaped measuring device 200 is formed as a thermocouple for measuring temperature as a measured value at a measuring point. ). The device of claim 1 or 2, wherein the rod-shaped measuring device (200) is adapted to bend the cable (28) drawn out of the measuring device by 90 ° outside the second stop at its end spaced from the object. Positioning device (100) for a rod-shaped measuring device (200), characterized in that it comprises a clamp cap (27). 3. The positioning device according to claim 1, wherein the outer skin of the rod-shaped measuring device is reinforced in the region of the spring member 120 and the second stop. 100. 3. Positioning device (100) for a rod-shaped measuring device (200) according to claim 1 or 2, characterized in that the spring member is formed as a compression spring. The positioning device (100) according to claim 1 or 2, characterized in that at least a part of the components of the positioning device are formed in a manner that is protected from corrosion.

Images