JP2593478Y2 - Coupling structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling structure capable of connecting and disconnecting a pipe by one-touch operation.

[0002]

2. Description of the Related Art FIG.
Explanation will be made based on FIG. A tubular adapter 2 attached to one end of one pipe 1 by a method such as screwing or fitting, and a tubular coupler attached to one end of the other pipe 3 in the same manner and into which the adapter 2 is inserted. And 4.

The coupler 4 has at least two fastening levers 12 rotatably mounted on a pivot 11. The fastening levers 12 are respectively connected to the cam portions 1.
3, and the cam portion 13 is actuated when the fastening lever 12 is rotated around the pivot shaft 11. When the adapter 2 is inserted into the coupler 4 and fitted into the recess 15 on the peripheral surface of the adapter 2, the cam portion 13 firmly connects the adapter 2 and the rotary cylinder 7. In addition,
In this state, the free end of the fastening lever 12 approaches the coupler 4.

In order to facilitate rotation of the fastening lever 12 when the pipes 1 and 3 are separated, a pull ring 18 is provided at a free end of the fastening lever 12. Further, the coupler 4 is provided with a gasket 19 to which the end face of the adapter 2 can adhere.

[0005] Generally, when the connection state between the adapter 2 and the coupler 4 is released and the adapter 2 is separated, the adapter 2 is connected to the adapter 2 in order to temporarily stop a substance pumped from one of the pipes 1. Is a ball valve 25 shown in FIG.
Is connected.

In order to connect the adapter 2 and the ball valve 25, a threaded portion 2 a is provided on the inner peripheral surface of the adapter 2 on the tube 1 side. The portion is provided with a screw portion 25a, and a connection member (not shown) such as a nipple is used to connect the screw portions 2a and 25a.

The ball valve 25 comprises the cylindrical casing 26 and a ball 27 rotatably supported inside the casing 26. The ball 27 has a through hole 28 in the lateral direction.
Are provided so as to be electrically connected to the housing 26. A lever handle 29 protruding from an upper portion of the housing 26 is attached to an upper portion of the ball 27. Although not shown, one end of the pipe 1 is connected to an end of the ball valve 25 opposite to the threaded portion 25a by a method such as screwing or fitting.

That is, by rotating the lever handle 29, the ball 27 is rotated and the housing 2 is rotated.
The ball valve 25 is opened and closed by electrically connecting and disconnecting the through hole 28 of the ball 27 with the through hole 28 of the ball 27.

[0009]

However, in the above-described coupling structure, since the adapter 2 and the ball valve 25 are separate components, a threaded portion 2a is formed in the adapter 2 and a threaded portion is formed in the ball valve 25. A portion 25a is formed, and these screw portions 2a, 25a are connected by a connecting member such as a nipple.

Therefore, the adapter 2 and the ball valve 2
5, the liquid pool was generated in this portion, and when used for high-viscosity products such as foods, cleaning was troublesome.

Further, since the threaded portions 2a and 25a are formed on the adapter 2 and the ball valve 25, respectively, and connected by connecting members such as nipples, the weight is inevitably increased. Further, when the adapter 2 is connected to the ball valve 25, a screwing operation is required, and there is a problem that the mounting workability on site is poor.

Therefore, the present applicant has developed a coupling which has solved the above-mentioned problems, and
No. has been filed. That is, the above-mentioned prior application:
As shown in FIG. 7, a valve adapter 30 having a ball valve 25 is provided.
Connecting pipe 3 to be inserted into coupler 4
3 are provided.

Further, the coupler 4 is provided with a fastening lever 12 having a cam portion 13 which can be fitted into the concave portion 15 of the coupler connecting pipe 33 inserted into the coupler 4, and connects the valved adapter 30 to the coupler 4. It is composed.

According to this construction, the adapter with a valve, in which the ball valve is formed integrally with the adapter, can be directly connected to the coupler 4, the dimension between the adapter and the ball valve is shortened, and the weight is reduced. Is done.

However, the piping must be connected to the adapter 3 with a valve.
Since the screw connection is made by screwing to the threaded portion 34, a step is formed between the lumen of the pipe 1 and the lumens of the valved adapter 30 and the ball valve 25.
Occurs.

That is, when a perishable fluid is circulated such as in a food factory or a chemical factory, there is a risk that food or chemicals will accumulate in the liquid reservoir a, which will rot and mix into the food or chemicals. Similarly, when a paint of a different color is circulated in a paint factory, there is a possibility that the paint accumulated in the liquid reservoir a may be mixed.

Further, the screw portion 3 of the adapter 30 with a valve is provided.
Because the pipe 1 is screwed and connected to 4, the tank freight car,
When used in a place where vibration is applied, such as a tank truck, the screw connection portion may be gradually loosened due to the vibration, and gas, liquid and the like may leak.

The present invention has been made in view of the above-mentioned circumstances, and has as its object that there is no liquid pool portion, and there is no risk of decay even when used for piping for distributing foods and chemicals. It is to provide a coupling structure that is easy to clean.

[0019]

SUMMARY OF THE INVENTION In order to achieve the above object, the coupling structure of the present invention provides an adapter body with a valve containing a ball valve having a bore therein, and one end of the adapter body with the valve. A flange joint provided integrally with the ball valve and having a bore flush with the bore of the ball valve; a screw connection provided at the other end of the adapter body with the valve; and a screw connected to the screw connection. A coupler connecting tube having a concave portion in the portion and the outer peripheral portion and having a lumen flush with the bore of the ball valve, and a screw portion connected to a screw connection portion of the adapter body with the valve;
A cam portion that can be fitted into a concave portion of the coupler connection tube;
The coupling body comprises a fastening lever and a coupler body having a bore flush with the bore of the ball valve, and the coupler connection tube and the coupler body can be selectively connected to the screw connection portion of the adapter body with the valve. It is in.

[0020]

According to the coupling structure having the above-described structure, a flange joint is integrally provided with an adapter with a valve in which a ball valve is formed integrally with the adapter so as to be flush with the inner cavity of the ball valve. The fluid does not accumulate in the lumen, and the coupler connection tube and the coupler body can be selectively connected to the threaded connection portion of the adapter body with the valve.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the coupling structure of the first embodiment, and reference numeral 30 denotes an adapter with a valve. The adapter body 31 of the adapter 30 with a valve includes a first tubular body 3
2 and a second tubular body 33 as a coupler connecting tubular body.

At one end of the first tubular body 32, a flange joint 43 for connecting one of the pipes 1 is integrally provided, and this lumen (liquid contact surface) 44 is provided in the bore 41 of the ball valve 25. It is formed flush. A screw connection portion 35 is provided at the other end of the first tubular body 32, and a screw connection portion 36 screwed to the screw connection portion 35 is provided at one end of the second tubular body 33. .

The bore (liquid contact surface) 42 of the second tubular body 33 is formed by the bore 41 of the ball valve 25 and the flange joint 4.
3 and is provided with a tubular concave portion 15 on the outer peripheral surface similarly to the conventional adapter 2.

The first tubular body 32 and the second tubular body 33
Are connected by screw connection portions 35 and 36 to form a valve chamber 37 inside the adapter main body 31, and the valve chamber 37 accommodates the ball 27 rotatably supported by a pair of valve seats 38. ing. The ball 27 is connected to a lever handle 29 via a support shaft 39 that penetrates a side wall of the adapter body 31 and protrudes to the outside.

As described above, in the adapter 30 with a valve, the ball valve 25 is provided integrally with the adapter body 31, and the adapter 30 with a valve can be directly connected to the coupler 4. That is, the second having the concave portion 15
8 is inserted into the coupler 4 shown in FIG. 8, the coupling lever 12 of the coupler 4 is rotated around the pivot shaft 11, and the free end of the coupling lever 12 is moved closer to the coupler 4. The cam portion 13 of the fastening lever 12 engages with the concave portion 15 of the valved adapter 30, and the valved adapter 30 and the coupler 4 are connected.

As described above, the adapter 2 and the ball valve 25 are integrally formed to form the adapter 30 with a valve. The adapter 30 with the valve is provided with the flange joint 43 integrally, and the inner space 41 of the ball valve 25 is Flange joint 43
Since the inner cavity 44 is flush with the inner cavity 44, there is no step between them, and the liquid pool can be eliminated.

As a result, the conventional adapter becomes unnecessary,
The dimensions of the adapter main body 31 of the adapter with valve 30 are shortened, the weight is reduced, and cleaning is easy without liquid pool.

Further, by providing the flange joint 43 integrally with the adapter 30 with a valve, it is used for a tank wagon or a tank truck, and there is no fear that the screw portion will be loosened even if the coupling is subjected to vibration. There is no need to worry about fluid leakage, and reliability can be improved.

FIG. 2 shows a modification of the first embodiment, in which a relatively small-diameter, thin-walled flange joint 45 is integrally provided in the adapter 30 with a valve. Since the cavity 46 and the cavity 46 are formed flush with each other, there is no step between them, and the liquid pool can be eliminated.

FIG. 3 shows a state in which the pipe 1 having the flange joint 47 is connected to the flange joint 43 in the first embodiment, and a sealing material 48 such as a gasket such as Teflon is interposed between the flange joints 43 and 47. By tightening the flange joints 43 and 47 with the bolts and nuts 49, the two can be connected in an air-tight and liquid-tight manner.

FIG. 4 shows a state in which the pipe 1 having the flange joint 50 is connected to the flange joint 45 in a modification of the first embodiment, and a sealing material such as a gasket such as Teflon is provided between the flange joints 45 and 50. By tightening the flange joints 45 and 50 with the tightening ring 53 via the intermediary 52, the two can be air-tightly and liquid-tightly connected.

FIG. 5 shows a second embodiment. The adapter 30 with a valve and the flange joint 43 are the same as those of the first embodiment, but the screw connection 3 of the adapter 30 with a valve is shown.
In FIG. 5, a coupler 4 is screwed in place of the second tubular body 33 and fixed.

That is, the coupler body 51 of the coupler 4 is provided with the screw connection portion 36 and the fastening lever 12 rotatably pivoted by the pivot 11. The fastening lever 12 is provided with a cam portion 13, and the cam portion 13 is operated by rotating the fastening lever 12 around the pivot shaft 11.

Then, the adapter 2 is inserted into the coupler main body 51, and the cam portion 13 is engaged with the concave portion 15 on the peripheral surface of the adapter 2 by the fastening lever 12, whereby the adapter 2 and the coupler main body 51 are connected. Be linked. At this time, the end face of the adapter 2 of the gasket 19 provided inside the coupler main body 51 is tightly sealed in an air-tight and liquid-tight manner.

[0035]

[Effects of the Invention] This invention was constructed as described above.
A flange joint is provided integrally with the adapter with the valve in which the ball valve is formed integrally with the adapter, and the gap of the flange joint and the lumen of the adapter with the valve are made flush with the lumen of the ball valve, so that a step is eliminated. Eliminates liquid pool and can be easily cleaned even when used for piping of foods and chemicals.There is no fear that food and chemicals stored in the liquid pool will rot, and it is used for piping of paints and the like. Even if the scum is mixed, no scum is mixed.

Further, by providing a flange joint integrally with the adapter with a valve, there is no need for a screw connection portion, so that periodic inspection and disassembly and cleaning can be easily performed. Further, when the coupling is used for a tank train or a tank truck, the coupling is subject to vibration. Even if the screw connection is not loosened, leakage of gas and liquid can be prevented, and a highly reliable coupling can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a coupling structure according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a modification of the embodiment.

FIG. 3 is a side view of the flange joint structure according to the first embodiment.

FIG. 4 is a longitudinal sectional side view of a flange joint structure according to a modified example of the first embodiment.

FIG. 5 is a partially cutaway perspective view showing a coupling structure according to a second embodiment of the present invention.

FIG. 6 is a vertical side view of a conventional coupling.

FIG. 7 is a vertical side view of a conventional ball valve.

FIG. 8 is a longitudinal sectional side view of the coupling of the earlier application.

[Explanation of symbols]

 1, 3 ... piping 4 ... coupler 12 ... fastening lever 13 ... cam part 15 ... concave part 25 ... ball valve 30 ... adapter with valve 43, 45 ... flange joint. 51 ... Coupler body

Claims (1)

(57) [Scope of request for utility model registration] 1. An adapter body with a valve having a built-in ball valve having a bore therein, and a flange integrally provided at one end of the adapter body with a valve and having a bore flush with the bore of the ball valve. A joint, a screw connection portion provided at the other end of the adapter body with a valve, a screw portion connected to the screw connection portion, and a concave portion in an outer peripheral portion; A coupler connecting tube having a cavity, a screw portion connected to a screw connecting portion of the adapter body with a valve, a cam portion capable of fitting into a concave portion of the coupler connecting tube, a fastening lever, and the ball valve. It consists of a coupler body having a cavity flush with the cavity, and the coupler connection tube and the coupler body can be selectively connected to the screw connection portion of the adapter body with a valve. A coupling structure characterized in that: