JPH035750Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] a. Field of industrial use The invention is a device for connecting pipes for scientific equipment for analysis etc. in a communicating state to a through hole in a connection base, and is particularly suitable for pipes. Fluid leaks from the connection,
This invention relates to a pipe connection device for physical and chemical equipment whose end face is sealed to prevent any residue from remaining.

b. Prior Art This type of conventional pipe connecting device has a method of pressing a screw, for example, as in the devices proposed by the present applicant in Japanese Utility Model Application Publication No. 191789/1989 and Publication No. 73187 of 1987, which were previously proposed by the present applicant. Therefore, the contact body whose volume is slightly deformed,
The pipe was connected to the base body in such a way that it was brought into close contact with the outer peripheral surface of the pipe inserted into the connection part of the base body to prevent leakage of the fluid passing through the pipe.

C. Problems to be solved by the invention However, the connection between the pipe and the connecting base is still unstable only by deforming the conventional contact body.
In particular, minute gaps may occur at the end of the pipe that abuts the edge of the hole in the connection base, allowing fluid to leak, and if this leaked fluid remains, it will be mixed with the subsequent sample liquid and cause problems in analysis, etc. Ta.

Therefore, the purpose of this invention is to securely connect the pipe to the connection base in such a pipe connection device for physical and chemical equipment, and to prevent fluid from leaking or remaining from the connection end surface. be.

[Structure of the idea]

a Means for Solving the Problem In order to achieve this object, the pipe connection device for physical and chemical equipment according to the present invention is provided with an inner spiral 1a on the inner circumferential wall surface of a groove formed at the connection end.
The groove has a connecting base 1 in which a through hole 11 is opened at the center of the bottom surface thereof, and an inner diameter opening 10 having the same diameter as the through hole 11 of the connecting base 1, and this inner diameter opening 10 is connected to the through hole 11.
This is a device for connecting a pipe 3 whose end face abuts the hole edge of a through hole 11 in a continuous communication manner with a pipe 3 through a connector consisting of a packing 8, a clamp 5, and a fixed screw cylinder 2. The clamp 5 has an outer periphery at one end that is tapered in diameter and has a dividing groove 6 on the outer periphery.
is integrally formed with the reduced diameter head 5a carved with the annular flange 5b that contacts the bottom surface of the concave groove of the connection base 1, and the small diameter of the reduced diameter head 5a side through which the pipe 3 is inserted through the axis. An inner space 7 is formed by a large diameter hole on the side of the annular flange 5b that accommodates the clamp 5 attached to the outer periphery of the end of the pipe 3. A funnel-shaped internal slope 4 that fits the diameter-reduced head 5a is formed on the tip side of the through hole 2b through which the connecting body 3 is inserted, and an external thread 4 that is screwed into the internal thread 1a of the connection base 1 is formed on the outer peripheral surface. shape 2a
is provided, and one end side of the packing 8 is connected to the inner cavity 7.
The clamp 5 fitted into the pipe 3 and the fixing screw cylinder 2 with the internal inclined surface 4 fitted onto the reduced diameter head 5a are inserted into the outer periphery of the connecting end of the pipe 3, so that the end surface of the pipe 3 fits into the hole of the through hole 11. It is inserted into the concave groove of the connection base 1 in such a manner that it touches the edge, and the outer helical 2a of the fixed screw cylinder 2 is screwed into the inner helix 1a of the connection base 1, and the diameter is reduced at the inner inclined surface 4. The packing 8 is simultaneously pressed against the outer peripheral surface of the end portion of the pipe 3 and the hole edge of the through hole 11 by the clamp 5 whose diameter is reduced while the head 5a is pressed.

b. Examples Hereinafter, the present invention will be explained in detail based on illustrated examples.

The connection base 1 is a cylindrical body with a through hole 11 pierced at its axis, and an inner spiral 1a is provided on the inner circumferential wall surface of a groove formed at the connection end, and an inner spiral 1a is provided at the center of the bottom surface of the groove. The through hole 11 is opened in the opening.

The pipe 3 connected to the connecting base 1 has an inner diameter opening 10 having the same diameter as the through hole 11 of the connecting base 1, and the inner diameter opening 10 is connected to the through hole 11 in series, and the end surface thereof is connected to the through hole 11. It is inserted into the concave groove of the connection base 1 in such a manner that it comes into contact with the edge of the hole 11, and the two are connected via a connection tool made up of the packing 8, the clamp 5, and the fixing screw cylinder 2.

As shown in FIGS. 5 and 6, the gasket 8 has a cylindrical shape with an inner diameter 9 that is fitted onto the outer periphery of the end of the pipe 3, and is made of a flexible material such as rubber material. has been done.

As shown in FIGS. 3 and 4, the clamp 5 also has a diameter-reducing head 5 whose outer periphery at one end is tapered.
a, and an annular flange 5b integrally formed on the other end of the reduced diameter head 5a, and has a small diameter hole 7a on the axis through which the pipe 3 can be inserted from one end, and a small diameter hole 7a through which the pipe 3 can be inserted from the other end. Large diameter holes 7b suitable for envelopment are formed respectively to form the inner cavity 7, and an appropriate number (4 in the embodiment) are formed in the reduced diameter head 5a.
A split groove 6 is carved in the book.

Further, the fixed screw cylinder 2 has the connection base 1 on the outer peripheral surface.
An outer thread 2a is provided which is screwed into the inner thread 1a of the
A through hole 2b through which the pipe 3 can be inserted is provided at the axis, and a funnel-shaped internal slope 4 that fits the reduced diameter head 5a is formed at the tip side of the through hole 2b.

Next, use the connecting tool to attach the pipe 3 to the connecting base 1.
This section explains how to connect the .

First, a clamp 5 with one end of the packing 8 fitted into the large diameter hole of the inner cavity 7, and a fixed screw cylinder 2 with the internal inclined surface 4 fitted into the reduced diameter head 5a of the clamp 5, It is assembled to the outer periphery of the connecting end of the pipe 3 in advance.

Next, the pipe 3 with the connecting tool assembled
is inserted into the concave groove of the connection base 1 in such a manner that the end surface contacts the hole edge of the through hole 11, and the outer helix 2a of the fixed screw cylinder 2 is screwed into the inner helix 1a of the connection base 1. Screw the screw tube 2 into place.

By screwing in the threaded cylinder 2, the clamp 5 whose diameter reducing head 5a is pressed by the internal inclined surface 4 moves forward along the outer circumference of the pipe 3, and the annular flange 5b of the clamp 5 and each end face of the packing 8 are moved forward along the outer circumference of the pipe 3. is the connection base 1
The center hole 10 of the pipe 3 is in continuous communication with the through hole 11 of the connection base 1.

When screwing the threaded tube 2 further in this state, the split groove 6
Since the diameter-reducing head 5a of the clamp 5 is reduced in diameter by the internal inclined surface 4, the packing 8 enclosed in the clamp 5 is attached to the outer periphery and end face of the connecting end of the pipe 3. Pressed.

As a result, the pipe 3 is connected to the connection base 1 in a state where the inner diameter opening 10 of the pipe 3 having the same diameter and the through hole 11 of the connection base 1 are connected in series, and the hole edge of the pipe 3 and the through hole 11 The contact portion is a packing 8 whose diameter is reduced by the clamp 5 and is pressed against the outer circumferential surface of the pipe 3, and which is also pressed by the clamp 5 and pressed against the edge of the through hole 11 to prevent liquid leakage. Also, the ends are completely sealed to prevent liquid pooling.

[Effect of idea]

In the pipe connection device of the present invention having the above configuration, the pipe is connected to the connection base in a state where the inner diameter port of the pipe 3 and the through hole of the connection base are serially communicated by screwing the fixing screw into the connection base. At the same time, the clamp, which covers the packing and is attached to the outer periphery of the inner end of the pipe, presses the packing against the outer peripheral surface of the pipe and the edge of the through hole at the same time, thereby preventing liquid leakage or pooling. The end face can be completely sealed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the main part, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a side view of the clamp, and FIG. 5 is a side view of the packing, and FIG. 6 is an end view of the same. Explanation of symbols, 1...Connection base, 2a...Inner screw type, 2...Fixing screw, 2a...Outer screw type, 2b, 1
1...Through hole, 3...Pipe, 4...Internal slope,
5... Clamp, 5a... Reduced diameter head, 5b... Annular flange, 6... Division groove, 7... Inner hollow part, 7a...
Small diameter hole, 7b... Large diameter hole, 8... Packing, 9...
...Inner diameter, 10...Inner diameter opening of the pipe.

Claims (1)

[Scope of utility model registration request] A connection base having an inner spiral formed on the inner peripheral wall surface of a groove formed at the connection end and a through hole opening at the center of the bottom of the groove, and a connection base having the same diameter as the through hole of the connection base. A connecting tool consisting of a packing, a clamp, and a fixing threaded cylinder is used to connect a pipe with an inner diameter opening that communicates with the through hole in a continuous manner, and whose end face abuts the edge of the through hole. The clamp has a tapered outer circumference at one end and a diameter-reduced head with a split groove carved on the outer circumference, and an annular flange that abuts against the bottom surface of the concave groove of the connection base. The shaft center has an inner cavity formed by a small diameter hole on the reduced diameter head side through which the pipe is inserted and a large diameter hole on the annular flange side that fits the clamp attached to the outer periphery of the end of the pipe. The fixing threaded cylinder has a funnel-shaped internal slope that fits the reduced diameter head on the tip side of a through hole provided at the axis of the pipe through which the pipe is inserted, and a funnel-shaped internal slope that fits the diameter reduction head. A clamp is provided with an outer thread that is threaded into the inner thread of the connection base, and one end of the packing is fitted into the inner cavity, and a fixing screw cylinder whose internal slope is fitted into the reduced diameter head. Insert the pipe around the outer periphery of the connection end, and insert it into the concave groove of the connection base with the end surface of the pipe in contact with the edge of the hole of the through hole, so that the outer helix of the fixing screw tube aligns with the inner helix of the connection base. A pipe connection for scientific equipment in which the gasket is screwed together and pressed against the outer circumferential surface of the end of the pipe and the edge of the through hole at the same time using a clamp whose diameter is reduced while the diameter-reduced head is pressed against the internal slope. Device.