JPH11276912A - Glass appliance and glass filter as well as their production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tubular glass appliance provided with a stopper capable of detaining a filter or the like in a stable state and a process for producing the same as well as an exchangeable glass filter capable of surely exhibiting a filtration function and having high strength and a process for producing the same. SOLUTION: The glass appliance G has the stopper 2 which is formed to a minor axis cylindrical shape and is inserted into a glass tube body 1 and is produced by coaxially inserting a stopper forming member cut to the diameter fitting to the glass tube body 1 into the glass tube body 1 and heating and fusing the glass tube body from the outer peripheral side thereof. The glass filter is a filter which is formed to approximately the minor axis columnar shape used for the glass appliance having the stopper and has a tapered outer peripheral surface and is produced by inserting a porous filter material of the minor axis columnar shape into the glass tube and heating and fusing the same from the outer peripheral side of the tube, then cutting out the filter from the outer peripheral side to a tapered shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass apparatus and a glass filter and a method for producing the same, and more particularly, to a glass apparatus used for a physics and chemistry experiment and a filter mounted on the glass apparatus. A tubular glass device provided with a stopper capable of locking the eye plate or the filter inserted therein in a more stable state, an exchangeable glass filter that can reliably perform a filtering function and has high strength, and The present invention relates to these manufacturing methods.

[0002]

2. Description of the Related Art In physics and chemistry experiments, tubular glassware having a stopper for locking a perforated plate, a filter, etc. is used in order to hold a catalyst or a particulate material as an adsorbent. You. FIG. 5 is a cross-sectional view including an axis and a cross-section orthogonal to the axis showing a general structure of a stopper in a conventional glass device.

As shown in FIG. 5, a stopper in the above-mentioned glassware is obtained by uniformly heating and melting a part of a glass tube from the outer periphery along the circumferential direction, and then narrowing the fused portion from the outside to form an inner peripheral portion. 8, or after being heated and melted in the same manner as described above, and then protruding the melted portion from the outside with a sharp metal rod, as shown in FIG. For example, it has a structure in which projections are formed from three directions.

[0004] In addition, a glass filter for filtering a fluid may be attached to the above-mentioned glass instrument using the stopper. The glass filter is formed by processing a porous glass rod having a large number of fine through holes formed by sintering glass powder into a short-axis cylindrical shape.

[0005]

In the conventional tubular glassware, the surface of the stopper provided on the inner peripheral portion is formed in a gentle shape, so that the inserted plate or the like is not inclined. It is often locked in a stable state, and as a result, depending on the form of the packing such as the catalyst, there is a possibility that it may leak slightly.

[0006] Further, the conventional glass filter applied to the above-mentioned glassware is manufactured to have a diameter sufficiently smaller than the inner diameter of the glassware so that it can be easily mounted.
Further, since the stopper itself of the glass utensil has the above-mentioned problem, the stopper may not be able to exhibit the expected filtering function due to lack of adhesion to the inner peripheral surface of the glass utensil. Further, when the conventional glass filter is inserted in a state of being inclined to the glass apparatus, it may be difficult to remove the conventional glass filter because it is caught by the stopper and may not be easily replaced. In addition, there is a problem that it is easily damaged at the time of mounting.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a stopper which can lock a perforated plate, a filter or the like inserted therein in a more stable state. And a method of manufacturing the same. A second object of the present invention is to
An object of the present invention is to provide an exchangeable glass filter which can reliably exhibit a filtering function and has high strength, and a method for producing the same.

[0008]

In order to solve the above-mentioned problems, a glass device of the present invention is a glass device provided with a stopper for locking a perforated plate or the like on an inner peripheral portion of a glass tube main body. The stopper is formed in a short-axis cylindrical shape having a diameter substantially fitting to the inner peripheral portion of the glass tube main body, and is inserted coaxially into the glass tube main body and welded to the inner peripheral portion. It is characterized by. That is, since the stopper formed in a specific shape and formed separately from the glass tube main body has an end surface orthogonal to the axis of the glass tube main body, the stopper or the like inserted into the glass tube main body is stabilized. Lock in state.

The method for manufacturing a glass apparatus according to the present invention is the method for manufacturing a glass apparatus according to the above aspect, wherein the glass tube having a diameter fitted into the inner peripheral portion of the glass tube body is formed into a short-axis cylindrical shape. After cutting and obtaining the stopper forming member, the stopper forming member is coaxially inserted into the inner peripheral portion of the glass tube main body, and then the insertion portion of the stopper forming member is heated from the outer peripheral side of the glass tube main body, The stopper forming member is welded.

[0010] The glass filter of the present invention is a porous glass filter used for a glass apparatus provided with a stopper on the inner peripheral portion of a glass tube main body, and has a substantially short axis cylindrical shape and an outer peripheral surface. It is characterized by being formed in a taper. In other words, when the glass filter is inserted into the glassware from the small diameter side, the glass filter whose outer peripheral surface is formed into a specific shape, the insertion-side end is immersed inside the stopper and locked in a stable state by the stopper Is done.

[0011] In a preferred aspect of the present invention, the glass filter has an outer shell member having a short-axis annular shape and an outer peripheral surface formed into a tapered shape, and a short-axis columnar member which is fitted on the inner peripheral side of the outer shell member. Porous filter material. That is, the shell material made of ordinary glass can improve dimensional accuracy and exhibit high strength.

Further, in each of the above aspects, the stopper of the glass utensil is formed into a short-axis cylindrical shape having a diameter substantially fitting to the inner peripheral portion of the glass tube main body, and is welded to the inner peripheral portion. It is preferable that the inner peripheral surface of the stopper is formed in a taper having a gradually decreasing diameter in the insertion direction of the glass filter, and in such an embodiment, the outer peripheral surface of the glass filter exhibits more excellent adhesion.

The method for manufacturing a glass filter according to the present invention is a method for manufacturing a glass filter according to any of the above embodiments, wherein a porous filter material formed in a short-axis cylindrical shape is coaxially inserted into a glass tube. After that, the filter material is welded by heating the insertion site of the filter material from the outer peripheral side of the glass tube, and then cut out in a tapered shape from the outer peripheral side of the glass tube.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a structure of a stopper in a glass device according to the present invention. FIG. 2 is a cross-sectional view illustrating one embodiment and usage of the glassware. FIG.
1 is an external perspective view showing a structure of a glass filter according to the present invention. FIG. 4 is a cross-sectional view showing a state where the glass filter is mounted on the glass apparatus.

First, the glassware of the present invention will be described. The glass apparatus of the present invention is an apparatus provided with a stopper (2) for locking a perforated plate (3) or the like on an inner peripheral portion of a glass tube main body (1), as shown by a symbol (G) in FIG. Yes, it is used as a column, a reaction tube, a glass tube, and the like in physics and chemistry experiments and analytical tests. Glass tube body (1)
Depending on the required function, various shapes such as a straight tube, a shape with different diameters at both ends, and a container shape with a bulged center are employed, but the cross section perpendicular to the axis is formed in a circular shape. Is done.

The perforated plate (3) to be inserted is a support member having a disk-shaped outer shape and formed with a gap enough to hold, for example, a fibrous body or a granular body as a catalyst. . In the present invention, the concept of "mesh plate or the like" includes a functional member such as a filter inserted as a part of a device, in addition to the above-described support member for the filler.

The stopper (2) is a glass tube main body (1).
And is mounted inside the glass tube body (1). That is, the stopper (2)
It is formed in the shape of a short axis cylinder having a diameter that fits substantially into the inner peripheral portion of the glass tube main body (1), and is coaxially inserted into the glass tube main body (1) and welded to the inner peripheral portion. The outer diameter of the stopper (2) is smaller by about 0.01 to 0.2 mm than the inner diameter of the glass tube main body (1) so that the stopper can be smoothly inserted in the mounting process. The thickness of the stopper (2) is usually
Although it is about 1 to 5 mm, it is appropriately set according to the size and mass of the perforated plate (3) containing the filler to be supported.
Further, the axial length of the stopper (2) is set to, for example, about 3 to 10 mm according to the supported object.

In the glass apparatus (G) shown in FIG.
The stopper (2) has a specific shape as described above and is formed separately from the glass tube body (1), and the stopper (2) is orthogonal to the axis of the glass tube body (1). Since the end face is provided, when the eye plate (3) is inserted into the glass tube body (1), the inserted eye plate (3) is locked in a stable state. As a result, the filler such as the catalyst can be reliably held, and there is no problem such as leakage. For example, as shown in FIG. 2, the glassware (G) of the present invention is stacked in a plurality of stages, and an elastic cord (4, 4) such as a rubber ring is wound around a hook member protruding from the outer peripheral side. Are combined by
And it is used as a multi-stage reaction column or the like.

The glassware (G) is manufactured through the following steps. That is, in the manufacture of the glassware (G), first, a short-axis cylindrical stopper forming member is manufactured. The stopper forming member is obtained by cutting a glass tube having a diameter fitted into the inner peripheral portion of the glass tube main body (1) into a short axis shape. The glass tube used as the material of the stopper forming member can be cut by a so-called rotary grindstone. After forming the stopper forming member, the stopper forming member is coaxially inserted into the inner peripheral portion of the glass tube main body (1).

Next, the stopper forming member is welded to the inner peripheral surface of the glass tube main body (1) by heating and melting the insertion portion of the stopper forming member from the outer peripheral side of the glass tube main body (1), and the stopper (2). To form At the time of welding, a position corresponding to the stopper forming member is moved from the outer peripheral side of the glass tube main body (1) by using a jaw-shaped holding tool (named "chopstick") provided with a cylindrical carbon rod at the tip. By slightly applying pressure and slightly reducing the diameter of the glass tube body (1), welding can be performed more reliably and quickly.

In the above-mentioned manufacturing method, since the drawing process and the projection forming process using a metal rod are not performed as in the conventional device, the stopper forming portion is hardly deformed, and therefore the thickness of the glass tube body (1) is large. Can be maintained at the initial thickness, and the glassware (G) can be finished to the intended shape and internal volume.

Next, the glass filter of the present invention will be described. The glass filter of the present invention is indicated by the symbol (F) in the drawing, and as shown in FIG. 4, a glass device (G) provided with a stopper (2) on the inner peripheral portion of the glass tube main body (1). ) Is the filter used. As shown in FIG. 3, such a glass filter (F) is mainly made of a porous glass material obtained by sintering glass powder. The glass particle size of the glass filter (F) is
Usually, it is about G0 to G4.

The glass filter (F) shown in FIG. 3 has a substantially short axis cylindrical shape and a tapered outer peripheral surface so that it can be stably locked by the above-mentioned stopper. That is, the minimum diameter of the glass filter (F) is
The inner diameter of the stopper (2) is set smaller than the inner diameter, and the maximum diameter is set smaller than the inner diameter of the glass tube body (1) and larger than the inner diameter of the stopper (2). For example,
The diameter of the glass-filter (F) is about 5 to 150 mm, and the axial length is about 5 to 15 mm.

Further, the glass filter (F) of the present invention
When formed into the above-mentioned shape, in order to increase the dimensional accuracy and increase the strength on the outer peripheral side, a shell material (5) having a short-axis annular shape and a tapered outer peripheral surface is formed into a short-axis cylindrical shape. And a porous filter medium (6) fitted on the inner peripheral side of the outer shell (5). The outer shell member (5) is a member having a form in which an ordinary glass tube is sliced. The filter medium (6) is made of the above porous glass material. When the outer shell (5) and the filter medium (6) are combined and configured, the filter medium (6) is formed in a short-axis cylindrical shape and is welded inside the outer shell (5).

As the glassware to which the glass filter (F) is mounted, it is of course possible to use a conventional glassware. However, in order to mount the glass filter (F) stably and in close contact, as shown in FIG. Glassware is preferred. And when applying to the above-mentioned glassware, it is especially preferred that the stopper (2) has a specific shape. That is, as shown in FIG. 4, in a glass appliance to which the glass filter (F) of the present invention is applied, the stopper (2) is a short-axis cylinder having a diameter that is fitted to the inner peripheral portion of the glass tube main body (1). The inner peripheral surface of the stopper (2) is gradually reduced in diameter in accordance with the insertion direction of the glass filter (F) and engages with the outer peripheral surface of the glass filter (F). The taper is formed.

When the glass filter (F) of the present invention is inserted into the glass apparatus from the small diameter side, the outer peripheral surface is formed in a specific shape as described above, so that the end on the insertion side has the stopper (2). ) And is locked in a stable state by the stopper (2) without swinging. Further, when the glass filter (F) of the present invention is composed of the outer shell (5) and the filter medium (6), the outer shell (5) made of ordinary glass can improve the dimensional accuracy, In addition, it exhibits high strength. Therefore, the glass filter (F) of the present invention has excellent adhesion to the inner periphery of the glassware, has little damage during handling, and can be easily replaced without being caught by the stopper (2).

FIG. 4 shows a tapered inner peripheral surface.
When applied to the glassware (G) having the stopper (2) shown in (1), the outer peripheral surface of the glass filter (F) of the present invention has better adhesion to the inner peripheral surface of the stopper (2). Demonstrate. Therefore, the glass filter (F) of the present invention can sufficiently exhibit the intended filtration function, and is always engaged with the stopper (2) with high dimensional accuracy, so that it can be easily removed at the time of replacement. I can do it.

The above glass filter (F) is manufactured through the following steps. That is, in the production of the glass filter (F) of the present invention, first, a filter medium (6) is prepared. The filter medium (6) is obtained by cutting a porous glass rod into a short-axis cylindrical shape having a predetermined thickness (axial length). As the glass rod of the filter medium (6), a rod whose diameter is adjusted to be about 0.01 to 0.1 mm smaller than the inner diameter of the outer shell material (5) by a so-called jacket grinder is used. By machine. Then, after producing the filter medium (6), the filter medium (6) is coaxially inserted into a glass tube as a material of the shell material (5).

Next, the filter medium (6) is welded to the inner peripheral surface of the glass tube by heating and melting the insertion portion of the filter medium (6) from the outer peripheral side of the glass tube. Further, when welding, a position corresponding to the filter medium (6) is slightly pressed from the outer peripheral side of the glass tube using a tool such as the above-mentioned jaw-shaped clip, so that welding can be performed reliably and quickly. After welding the filter medium (6) inside the glass tube, the glass filter (F) is obtained by cutting out the outer periphery of the glass tube in a tapered shape. That is, the welded portion of the filter medium (6) is cut off at an angle from the outer peripheral side of the glass tube. Such a cutting process is performed by a tool such as a diamond cutting machine, and the glass filter (F) obtained by cutting is flattened at both end surfaces by polishing.

In the above-mentioned manufacturing method, since the relatively brittle porous filter medium (6) is cut out after being welded in advance to the inside of the glass tube as the outer shell (5), damage of the filter medium (6) during processing is prevented. Since the glass tube as the outer shell material (5) is cut out with a small amount, it can be tapered with high dimensional accuracy. In the above-mentioned manufacturing method, when inserting the filter medium (6) into the inside of the glass tube, a large number of filter mediums (6) are inserted in advance at a constant pitch, and the subsequent cutting process is continuously performed to improve the efficiency. A large number of glass filters (F) can be manufactured.

[0031]

As described above, according to the glassware of the present invention, the inserted eye plate and the like can be locked in a stable state, so that the filler such as the catalyst can be securely held. Further, according to the method for manufacturing a glass device, the stopper insertion portion has almost no deformation, the thickness of the glass tube main body can be maintained at the initial thickness, and the glass device is finished to the intended shape and internal volume. Can be done.

Further, according to the glass filter of the present invention, since the glass filter is locked in a stable state by the stopper, a reliable filtering function can be exhibited, and the glass filter can be easily replaced. Further, in the glass filter constituted by the outer shell material and the filter material, the dimensional accuracy can be improved, and high strength can be exhibited. Further, even more excellent adhesion can be exhibited with respect to a glass appliance having a specific stopper whose inner peripheral surface is tapered. Further, according to the above-described method for manufacturing a glass filter, the filter material can be processed with little damage and high dimensional accuracy during processing.

[Brief description of the drawings]

FIG. 1 is a sectional view including an axis and a sectional view orthogonal to the axis showing a structure of a stopper in a glass apparatus.

FIG. 2 is a cross-sectional view including an axis showing one mode and a use mode of a glass appliance.

FIG. 3 is an external perspective view showing the structure of a glass filter.

FIG. 4 is a cross-sectional view including an axis showing a state where a glass filter is mounted on a glass apparatus.

FIG. 5 is a sectional view including an axis and a sectional view orthogonal to the axis showing a structure of a stopper in a conventional glass apparatus.

[Explanation of symbols]

 1: Glass tube body 2: Stopper 3: Plate 5: Shell material 6: Filter material F: Glass filter G: Glass equipment

Claims (6)

[Claims] 1. A glass apparatus provided with a stopper for locking a perforated plate or the like on an inner peripheral portion of a glass tube main body, wherein the stopper has a diameter substantially fitting to an inner peripheral portion of the glass tube main body. A glass apparatus formed in a short axis cylindrical shape, inserted coaxially into the glass tube main body, and welded to the inner peripheral portion. 2. The method for manufacturing glassware according to claim 1, wherein the glass tube having a diameter fitted into the inner peripheral portion of the glass tube main body is cut into a short axis cylindrical shape to obtain a stopper forming member. Thereafter, the stopper forming member is coaxially inserted into the inner peripheral portion of the glass tube main body, and then the stopper forming member is welded by heating the insertion portion of the stopper forming member from the outer peripheral side of the glass tube main body. Manufacturing method of glassware. 3. A porous glass filter used for a glass apparatus having a stopper provided on an inner peripheral portion of a glass tube main body, wherein the glass filter has a substantially short-axis cylindrical shape and a tapered outer peripheral surface. A glass filter characterized by the following. 4. The glass filter according to claim 3, wherein the outer member is formed in a short-axis annular shape and the outer peripheral surface is tapered, and an inner peripheral side of the outer member is formed in a short-axis cylindrical shape. A glass filter consisting of a porous filter material fitted into a filter. 5. A stopper of the glass apparatus is formed in a short-axis cylindrical shape having a diameter substantially fitting with an inner peripheral portion of the glass tube main body and is welded to the inner peripheral portion, and an inner peripheral surface of the stopper is formed. 5. The glass filter according to claim 3, wherein the diameter of the glass filter is gradually reduced according to the insertion direction of the glass filter, and the taper is formed in a taper that engages with the outer peripheral surface of the glass filter. 6. The method for producing a glass filter according to claim 3, wherein a porous filter material formed in a short-axis cylindrical shape is coaxially inserted into a glass tube.
A method for manufacturing a glass filter, wherein a filter material is welded by heating an insertion portion of the filter material from the outer peripheral side of the glass tube, and then cut out in a tapered shape from the outer peripheral side of the glass tube.