JPH0525822B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joint-strengthened glass tube, a joint-strengthening method for a glass tube, and a glass tube connection method.

[Conventional technology]

Since stresses such as tensile stress and thermal stress due to temperature changes are applied to the joint part of the glass tube being piped, conventionally, as shown in FIG. A ferrule 53 made of the same material as the glass tube and expanding conically in the connection direction is added to increase the stress resistance strength of the joint part 52. In addition, the glass tube 51
An engagement groove 54 is formed in the end surface of the holder.

In the conventional glass tube connection method for connecting glass tubes, as shown in FIG.
an asbestos insert 56 that abuts on the outer periphery of each, an engagement protrusion 57 that engages with the engagement groove 54, and an insertion opening 58 that has a diameter that is approximately the same as the inner diameter of both glass tubes 51.
and has an insertion hole 60 into which the bolt 59 is inserted,
A pair of flanges 63 that have a rubber gasket 61 that abuts between the end faces of the glass tube 51 and an abutment part 62 that abuts the insert 56 inward in the connection direction, and that are bolted in the connection direction. Equipped with.

[Problem to be solved by the invention]

However, since adding ferrules requires skill, glass tubes in which the stress resistance of the joint portion is increased by adding ferrules are expensive.

Also, to add ferrules like this,
This had to be done at the glass tube production site and could not be done at the glass tube piping site.

In addition, even if you increase the strength of the joint by adding ferrules, if more stress than expected is applied to the joint during or after piping, cracks may easily form from the joint, including the ferrule.
Sometimes the joint part would break into pieces.

The present invention solves the above-mentioned technical problems and can strengthen the joint at a low cost and even at the piping site.Moreover, it is possible to strengthen the joint at a low cost and even when a stress is applied to the joint at a rate higher than expected during or after piping. Another object of the present invention is to provide a joint-strengthened glass tube, a joint-strengthening method for a glass tube, and a glass tube connection method, in which cracks do not easily form at the joint part of the glass tube and the joint part does not break into pieces.

[Means to solve the problem]

In order to achieve such an objective, the present invention
It has the following structure.

That is, the joint-strengthened glass tube according to the first aspect includes a thermal sprayed part that is thermally sprayed and built up over the entire outer or inner circumference of the joint part of the glass tube whose stress resistance is to be strengthened.

The glass tube joint strengthening method according to claim 2 includes:
The joint part of the glass tube that is to be strengthened in stress resistance is heated to almost the melting point, a thermal spray material is sprayed all around the outer or inner circumference of the joint part, and the thermal spray material is built up to form the thermal spray part. .

The glass tube connection method according to claim 3 is characterized in that the entire outer surface of the joint portion of the male glass tube formed in a straight tube shape is to be reinforced with stress resistance, or the female glass tube that can be fitted with the joint portion of the male glass tube is provided. It includes a thermal sprayed part that is thermally sprayed and overlaid on at least one of the entire inner circumference of the joint part of the glass tube of the mold to strengthen its stress resistance, and connects both joint parts.

The glass tube connection method of claim 4 is the same as that of claim 3, further comprising thermal spraying between the outer circumferential surface of the joint portion of the male glass tube and the end surface of the joint portion of the female glass tube. This includes a thermally sprayed reinforcement section.

A fifth aspect of the glass tube connection method is the same as the third or fourth aspect, further including a contraction tube surrounding at least the joint portion of the female glass tube.

The glass tube connection method according to claim 6 has an opening that is tapered in the connection direction, and a thermal sprayed part that is thermally sprayed and overlaid on the entire outer surface of the joint part that is to be strengthened in stress resistance, including at least the opening part. A pair of glass tubes having a diameter approximately equal to the inner diameter of both glass tubes, an inclined portion that abuts the entire inner circumference of the opening of the pair of glass tubes, a gasket portion that abuts the entire circumference of the end face of both glass tubes, and a diameter approximately equal to the inner diameter of both glass tubes. A connecting means for connecting both glass tubes, which includes a sleeve having an insertion opening of the same diameter and has elasticity and non-elution properties, and an abutting part that abuts the thermal sprayed part on the outer periphery of the opening inward in the connection direction. This includes:

[Effect]

In the joint-strengthened glass tube according to the first aspect, the thermal sprayed portion is thermally sprayed and built up over the entire outer surface or inner surface of at least the joint portion of the glass tube.

In the method for strengthening the joint of a glass tube according to claim 2, the joint portion of the glass tube to be thermally sprayed is heated to approximately the melting point, a thermal spraying material is thermally sprayed over the entire outer circumference or inner circumference of the joint portion, and the thermal spraying material is used to strengthen the joint. The sprayed part is formed by stacking.

In the glass tube connection method according to claim 3, the thermal spraying portion is formed on the entire outer surface of the joint portion of the straight male glass tube to be strengthened in stress resistance, or,
It is thermally sprayed and overlaid on at least one of the entire inner circumference of the joint part of the female glass tube that can be fitted with the joint part of the male glass tube to strengthen the stress resistance, thereby connecting both joint parts.

In the glass tube connection method according to claim 4, in addition to the method according to claim 3, the sprayed reinforcing portion is formed on the outer circumferential surface of the joint portion of the male glass tube and the end surface of the joint portion of the female glass tube. sprayed over a period of time.

In the glass tube connection method according to claim 5, in addition to the method according to claim 3 or 4, the contraction tube surrounds the joint portion of the female glass tube.

In the glass tube connection method of the present invention, the pair of glass tubes has a thermal sprayed part that is thermally sprayed and overlaid on the entire outer surface of the joint part whose end is open in the connection direction.

The sleeve has an inclined part that abuts the entire inner circumference of the joint parts of the pair of glass tubes, a gasket part that abuts the entire circumference of the end faces of the joint parts of both glass tubes, and an inner diameter that is approximately the same as that of both glass tubes. It has an insertion port with a diameter of

The connecting means has a thermally sprayed part on the outer periphery of the opening and an abutting part that abuts inward in the connection direction, and connects both glass tubes.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a partially cutaway sectional view of an embodiment of the present invention.

The joint portion 2 of the male glass tube 1 to be reinforced with stress resistance is heated to approximately its melting point. After the heating is completed, a finely powdered resin material such as Teflon, nylon, polyethylene, etc. is thermally sprayed on the entire outer circumference of the joint portion 2 using a thermal spray gun, thereby forming a thermal sprayed portion 3 that is overlaid.

Such formation of the sprayed portion 3 can be performed at the manufacturing site of the glass tube 1 or at the piping site. Moreover, the stress resistance of the joint portion 2 can be strengthened at low cost without requiring special techniques.

The joint part 5 of the female glass tube 4 is formed so that its inner diameter is slightly larger than the outer diameter of the glass tube 1, and can be fitted into the joint part 2 of the glass tube 1. The joint portion 2 of the male glass tube 1 is inserted into the joint portion 5 while the thermal spraying portion 3 is melting or after the thermal spraying portion 3 is heated and melted. Therefore, the thermal spraying section 3 is attached to the inner peripheral surface of the joint section 5. Sprayed part 3 and joint part 5
If the adhesion with the joint part 5 is not good,
heat up. As a result, the sprayed part 3 and the joint part 5 are firmly integrated.

Incidentally, the burr attached to the end face of the joint portion 5 is removed. Moreover, the width L ₀ of the sprayed part 3 is
It is preferable that the outer diameter of the glass tube 1 is 0.7 times or more the diameter _L1 .

Therefore, joint part 2 and joint part 5
are firmly integrated by the thermal spraying part 3, and the glass tube 1 and the glass tube 4 can be easily connected. Moreover, the stress resistance of the joint portion 5 can be easily strengthened. Moreover, since almost no stress is applied to the joint parts 2 and 5 during piping, cracks do not occur in the joint parts 2 and 5. Furthermore, even if more stress than expected is applied to the joint parts 2 and 5 after piping, the stress is strengthened by the thermal spraying part 3, and since it is integrated with the thermal spraying part 3, the joint parts 2 and 5 It is difficult to crack, and the joint parts 2 and 5 will not break into pieces.

In this embodiment, in order to further strengthen the connection between the glass tubes 1 and 4, resin is thermally sprayed and overlaid in a tapered shape on the end face of the joint part 5 and the outer peripheral surface of the joint part 2 using a thermal spray gun. A thermally sprayed reinforcing portion 6 is formed.

Therefore, joint part 2 and joint part 5
The joint parts 2 and 5 are firmly integrated, and the glass tubes 1 and 4 are prevented from falling off due to separation of the joint parts 2 and 5. Moreover, since the thermal spray reinforcement part 6 is formed in a tapered shape, the end face of the joint part 5 is not caught, is less likely to be scratched, and the adhesion with the contraction tube 7 described later is improved.

Further, in this embodiment, a heat-shrinkable shrink tube 7 is inserted into the outer periphery of the joint portion 5 and is heat-shrinkable. The contraction tube 7 surrounds the joint part 5.

Therefore, the joint part 5 is prevented from being damaged, the joint part 5 can be fixed with a hanger (not shown), and the appearance can be improved.

In addition, as another embodiment of the present invention, a resin may be thermally sprayed and overlaid on the entire inner peripheral surface of the joint part 5 to form a thermally sprayed part to strengthen the stress resistance of the joint part 5.

FIG. 2 is an exploded sectional view of another embodiment of the invention.

The pair of glass tubes 11 and 12 are so-called wrapper tubes, and are provided with an opening 15 and an opening 16 that open in connection directions 31 and 32. The joint portions 13, 14 to be reinforced in stress resistance include openings 15, 16. The entire outer circumference of the joint parts 13 and 14 has thermal sprayed parts 17 and 18 where resin is thermally sprayed and overlaid.
are formed respectively.

Such formation of the sprayed portions 17 and 18 can be performed at the production site of the glass tubes 11 and 12 or at the piping site. Furthermore, the stress resistance of the joint portions 13 and 14 can be strengthened at low cost without requiring special techniques.

The sleeve 19 is made of an elastic and non-eluting resin such as Teflon, nylon, and Diuracon.
Inclined portions 20 and 21 that abut the entire inner circumferences of the openings 15 and 16, gasket portions 22 that abut the end surfaces of the openings 15 and 16, respectively, and the glass tube 1.
The insertion opening 23 has a diameter that is approximately the same as the inner diameter of the holes 1 and 12.

The flanges 24 and 25 serving as connection means are made of resin such as nylon or Diflon, or metal such as stainless steel, and have contact portions 26 and 25 that are in contact with the sprayed portions 17 and 18 inwardly in the connection direction 33 and 34, respectively. 27 and are bolted in the connection directions 31, 32.

The entire inner circumference of the openings 15 and 16 is covered by the sleeve 19.
The slanted portions 20 and 21 of the slanted portions 20 and 21 are firmly abutted and closely attached. Further, the end surfaces of the openings 15 and 16 are firmly abutted against the gasket portion 22 of the sleeve 19 and are in close contact with the gasket portion 22 of the sleeve 19. Also, the contact portion 2 of the flanges 24 and 25
The parts 6 and 27 are brought into contact with the thermal spray parts 17 and 18 and are brought into close contact with them.

Therefore, the opening 15 and the opening 16 are connected to the sleeve 19, the sprayed parts 17 and 18, and the flange 2.
4 and 25, the glass tube 1
1 and the glass tube 12 can be easily connected. Moreover, the openings 15, 1 of the glass tubes 11, 12
No leakage occurs between the sleeve 19 and the sleeve 19. In addition, flanges 24,
25 does not come into direct contact with the opening 1.
5 and 16 are prevented from being scratched. Furthermore, although compressive stress is applied to the openings 15 and 16 during piping, the joints 13 and 14 do not crack because the stress resistance is strengthened by the thermal sprayed parts 17 and 18. Furthermore, after piping, joint part 1
Even when stress is applied to parts 3 and 14 more than expected, the stress resistance is strengthened by the thermal sprayed parts 17 and 18, the joint part 13 and the thermal sprayed part 17 are integrated, and the joint part 14 and the thermal sprayed part 18 are Since the joints 13 and 14 are integrated, cracks are unlikely to form in the joints 13 and 14, and the joints 13 and 14 will not break into pieces. Further, since the sleeve 19 has non-elution properties, even when used with fluids such as medical solutions flowing through the glass tubes 11 and 12, elution does not occur from the sleeve 19, and any fluid can be used.

In addition, as another embodiment of the present invention, the joint portions 13 and 14 may be implemented as only the opening portions 15 and 16.

Also, the joint parts 13 and 14 are connected to the opening part 15,
The thermal sprayed portion may be formed by thermal spraying and overlaying resin on the entire inner circumference of the openings 15 and 16.

Further, in the above-described embodiment, the thermal sprayed part is formed by thermal spraying and overlaying with resin, but in other embodiments of the present invention, the thermal spraying part is formed by thermal spraying and overlaying with metal such as copper or ceramic. may be formed.

〔Effect of the invention〕

In the joint strengthened glass tube according to the first aspect, the thermal sprayed portion is thermally sprayed and built up over the entire outer surface or inner surface of at least the joint portion of the glass tube.

Therefore, thermal spraying can be carried out on inexpensive glass tubes without requiring special skill, and moreover, it can be carried out anywhere, such as at glass tube manufacturing sites or glass tube piping sites. Moreover, the stress resistance of the joint part can be strengthened by the thermal spraying part. moreover,
Due to the thermal spraying, even if stress is applied to the joint part, the joint part of the glass tube is unlikely to crack, and the joint part will not break into pieces.

In the method for strengthening the joint of a glass tube according to claim 2, the joint portion of the glass tube to be thermally sprayed is heated to approximately the melting point, a thermal spraying material is thermally sprayed over the entire outer circumference or inner circumference of the joint portion, and the thermal spraying material is used to strengthen the joint. It is arranged to form a sprayed part by piling it up.

Therefore, the glass and the sprayed material are firmly integrated, the sprayed part does not peel off from the glass tube, and the stress resistance of the joint part can be strengthened.

In the glass tube connection method according to claim 3, the thermal spraying portion is applied to the entire outer surface of the joint portion of the male glass tube formed in the shape of a straight tube, which is to be strengthened in stress resistance, or
At least one of the entire inner circumference of the joint part of the female glass tube that can be fitted with the joint part of the male glass tube is thermally sprayed and overlaid to strengthen the stress resistance, thereby connecting both joint parts. .

Therefore, the joint part of the male glass tube and the joint part of the female glass tube are firmly integrated by the sprayed part, making it easy to connect the male glass tube and the female glass tube. can do. Also,
The stress resistance of the joints of male and female glass tubes can be easily strengthened. Furthermore, since almost no stress is applied to both joints during piping, there is no possibility of cracks occurring in both joints. Furthermore, even if more stress than expected is applied to both joints after piping, the stress will be strengthened by the thermal spraying, and since it is integrated into the thermal spraying, cracks will not easily form from both joints. Both joint parts will not break into pieces.

In the glass tube connection method of claim 4, in addition to the method of claim 3, a thermal sprayed reinforcing portion is further provided on the outer circumferential surface of the joint portion of the male glass tube and on the end surface of the joint portion of the female glass tube. Thermal spraying is applied over a period of time.

Therefore, both joint parts are firmly integrated, and the joint part of the male type glass tube and the joint part of the female type glass tube are prevented from separating and falling off.

In the glass tube connection method according to claim 5, in addition to the method according to claim 3 or 4, the joint portion of the female glass tube is further surrounded by a contraction tube.

Therefore, the joint part of the female glass tube is prevented from being damaged, the joint part can be fixed with a hanger, and the appearance can be improved.

The glass tube connection method according to claim 6 includes a pair of glass tubes having a thermal sprayed part that is thermally sprayed and overlaid on the entire outer surface of the joint part whose end is open in the connection direction, and a joint part of the pair of glass tubes. Equipped with an inclined part that abuts the entire inner circumference, a gasket part that abuts the entire end surface of the joint part of both glass tubes, and an insertion opening with a diameter that is approximately the same as the inner diameter of both glass tubes, and has elastic and non-elastic properties. The glass tube includes a sleeve having elution properties, and a connecting means that connects both glass tubes by having an abutment portion that abuts the thermal sprayed portion on the outer periphery of the opening inward in the connection direction.

Therefore, the thermal spraying section is used at glass tube manufacturing sites,
It can be formed at the piping site, does not require any special technology, and can strengthen the stress resistance of the joint at low cost.

Furthermore, the openings of both glass tubes are firmly integrated by the sleeve, the sprayed portion, and the connecting means, so that both glass tubes can be easily installed. Furthermore, no leakage occurs between the openings of both glass tubes and the sleeve. Furthermore, since the connecting means does not come into direct contact with both openings, damage to the openings is prevented. Furthermore, although compressive stress is applied to both openings during piping, the joints will not crack because the thermal sprayed parts strengthen the stress resistance. Furthermore, even if more stress than expected is applied to the joint part after piping, the thermal sprayed part strengthens the stress resistance, and since the joint part and the sprayed part are integrated, it is difficult for cracks to form from the joint part. , the joint part will not break into pieces. Further, since the sleeve has non-elution properties, even when used with fluids such as medical solutions flowing through both glass tubes, no elution occurs from the sleeve, and any fluid can be used.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view of one embodiment of the present invention, and FIG. 2 is an exploded sectional view of another embodiment of the present invention.
Figure 3 is a partially cutaway sectional view of a conventional glass tube.
FIG. 4 is a diagram showing a conventional glass tube connection method. 1, 4, 11, 12...Glass tube, 2, 5, 1
3, 14... Joint part, 3, 17, 18... Thermal sprayed part, 6... Thermal sprayed reinforcement part, 7... Shrink tube, 15,
16...Opening part, 19...Sleeve, 20, 21...Slope part, 22...Gasket part, 23...Insertion port, 2
4, 25...flange, 26, 27...contact part, 3
1, 32...Connection direction, 33, 34...Connection direction inward.

Claims (1)

[Scope of Claims] 1. A joint-strengthened glass tube characterized by including a thermal sprayed part that is thermally sprayed and overlaid on the entire outer or inner circumference of the joint part of the glass tube whose stress resistance is to be strengthened. 2 Heat the joint part of the glass tube whose stress resistance is to be strengthened to almost the melting point, spray the thermal spray material all around the outer or inner circumference of the joint part, and build up the thermal spray material to form the thermal sprayed part. Characteristic method for strengthening glass tube joints. 3. The entire outer surface of the joint part of a straight male glass tube to be reinforced with stress, or the joint part of a female glass tube that can be fitted with the joint part of a male glass tube is to be reinforced with stress resistance. A glass tube connection method characterized by including a thermal sprayed part that is thermally sprayed and overlaid on at least one of the entire inner circumference of a joint part to connect both joint parts. 4. The glass tube according to claim 3, further comprising a thermal sprayed reinforcing portion that is thermally sprayed between the outer peripheral surface of the joint portion of the male glass tube and the end surface of the joint portion of the female glass tube. Connection method. 5. The glass tube connection method according to claim 3, further comprising a contraction tube surrounding at least the joint portion of the female glass tube. 6 A pair of glass tubes each having a tapered opening in the connection direction and a thermally sprayed part that is thermally sprayed and overlaid on the entire outer surface of the joint part that is to be reinforced with stress resistance, including at least the opening; The glass tube has an inclined portion that abuts the entire inner circumference of the opening of the glass tube, a gasket portion that abuts the entire circumference of the end face of both glass tubes, and an insertion port having a diameter that is approximately the same as the inner diameter of both glass tubes, A glass characterized by comprising: a sleeve having elasticity and non-elution properties; and a connecting means for connecting both glass tubes, the sleeve having an abutment portion that abuts a thermal sprayed portion on the outer periphery of the opening and an abutment portion that abuts inward in the connection direction. Pipe connection method.