JP3003285B2 - Liquid supply piping connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pipe connecting device used when liquid is transferred from one container to another container.

[0002]

2. Description of the Related Art A so-called "multi-purpose batch plant" for a batch process is constructed and used as an appropriate production facility for producing high value-added products having a relatively small production amount, such as fine chemical products. Have been.
In this type of plant, there are often liquid transfer operations in which liquid processed in a certain reaction vessel is transferred to another reaction vessel for the next step, and it is desirable to perform the operation safely and labor-saving.

[0003] Needless to say, the point that meets this demand is the simplicity and reliability of connecting and disconnecting the piping. As a device intended to obtain such an effect, for example, a device provided with a supply pipe inlet above the middle of a cylinder placed in a horizontal direction is provided with an end of a receiver pipe coming in from a horizontal direction and having an upper end. The liquid is circulated when the openings provided toward the container coincide with each other, the receiving pipe retreats when the prescribed amount has been transferred, and the receiving port is replaced by the plunger that has moved. Has been proposed (JP-A-2-194829).

[0004] The above-mentioned supply system can achieve the purpose of keeping the liquid path airtight during the transfer of the liquid, but has the problem of "liquid dripping" from the supply pipe, that is, disconnects the pipe after the transfer. However, the problem that the liquid remaining on the end of the supply pipe dripping and then polluting the surroundings has not been solved. This problem is particularly important if the liquid is hazardous or corrosive.

[0005] When handling different kinds of liquids for reasons such as switching of raw materials, there is a problem of contamination due to their mixture. In the cleaning, it is difficult to clean the nozzle portion on the receiving side, particularly, a portion upstream of the receiving valve due to its structure.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by maintaining the airtightness of the flow path when transferring a liquid, as well as the pipe end on the supply side. The liquid supply pipe connection device eliminates the problem of liquid dripping because the liquid does not remain on the surface and the liquid does not adhere to the upstream side of the valve on the receiving side due to the structure, thus naturally eliminating the problem of difficulty in cleaning. Is to provide.

[0007]

As shown in FIG. 1, a connecting device for a liquid supply pipe according to the present invention comprises the following parts A) to C).
A) An insertion tube (12) is provided at the discharge end of the liquid container or pipe and protrudes below the three-way valve (11) with a sufficient length, and a side of the three-way valve is provided. B) a supply-side portion provided with a gas flow pipe (14) bent downward from a branch pipe (13) extending toward the bottom of the ball valve (21) at the receiving end of a liquid container or pipe. A ball valve (21) in which the diameter of the passage (22) is larger than the outer diameter of the insertion tube, a receiving side portion provided with a gasket (23) for keeping the airtightness between the supply side portion, and C) a gas source An orifice (32) is provided above a gas supply valve (31) connected to the gas supply valve, and a rubber hollow ring (33) expandable and contractable at least inward is disposed above the orifice (32). Channel and rubber hollow above A gas supply portion formed by connecting the inside of the gas ring with the inside of the gas passage tube, and a tip portion of the gas flow tube is inserted into the rubber hollow ring when the insertion tube is inserted into the ball valve. It is configured to be located and grasped by its expansion to shut off the gas flow path from outside air.

In this apparatus, it is preferable that the inner surface of the insertion tube on the supply side is coated with a fluororesin.

[0009]

FIG. 4 shows an example in which the connecting device of the present invention is applied to a case where a raw material is supplied to a reactor of a multipurpose batch plant. In this figure, (4) is a reactor, and (5) is a liquid tank for transferring raw materials. This tank is carried by a moving device (6) with a lift (61).

In order to transfer the liquid from the tank (5) to the reactor (4), the tank is first lifted up by a lift, approached to the reactor, and the supply side portion (A) provided at the lower part of the tank.
Is located just above the receiving part (B). When the state shown in FIG. 1 is obtained in this way, the lift is lowered to unite the supply-side portion and the reception-side portion and connect the gas supply portion (C). Three-way valve (11)
2 is opened only in the up-down direction to cause the liquid to flow down, as shown in FIG. As is clear from this figure, the insertion tube (1
Since the tip of 2) has reached the downstream through the ball valve (21), the liquid does not adhere above the ball valve.

When the transfer of a predetermined amount of liquid has been completed, the three-way valve is operated to close the liquid flow path and open the gas supply valve (31), as shown in FIG. As the gas to be supplied, an inert gas such as nitrogen gas is used as necessary.

Due to the passage of the gas, a pressure difference occurs before and after the orifice (32), and the pressure in the space (35) near the tip of the gas flow pipe downstream of the orifice becomes lower than that of the upstream.
The interior (36) of the rubber hollow ring is connected to the upstream and is at the same pressure, which is usually above atmospheric pressure, so that the hollow ring (33) expands inward.

In this way, the gas is inserted through the branch pipe (13) while the gas flow pipe (14) is grasped by the hollow ring (33), and thus the space between them is kept airtight. Goes rapidly into tube (12). The liquid (8) remaining in the insertion tube is blown off due to the rapid flow of this gas, and falls into the receiving container.

If the inner surface of the insertion tube is coated with a water-repellent substance such as a fluororesin, the residual liquid tends to flow down and only slightly remains at the lower end of the insertion tube.
It can be completely removed by blowing off the gas. Also, cutting the end of the insertion tube (12) diagonally is effective in reducing the residual liquid.

When the gas is allowed to flow, the container on the receiving side can be closed even if the volume of the upper space is large, but it is usually more effective to open the vent valve and flow the gas.

After the residual liquid adhering is removed, the gas supply valve (31) is closed, and then the tank (5) is lifted upward by a lift, so that the supply side (A) is changed to the receiving side (B) and the gas supply part. (C), disconnect the ball valve (2
By closing 1), the transfusion work is completed.

The operation of the three-way valve (11) described above can be performed by providing an actuator on the receiving side and operating the actuator after the supply side portion and the receiving side portion are completely integrated. Automation is easy, which is advantageous in terms of equipment configuration and safe. FIG. 5 shows a specific example of such means. In this example, the valve operation head (15) of the three-way valve (11) is connected to the three-way valve operation head receiver (7) of the torque actuator (7).
It is configured so as to descend toward 1) and engage after being engaged.

[0018]

According to the liquid supply pipe connecting apparatus of the present invention, liquid dripping of the remaining liquid is eliminated by blowing off the liquid adhering to the pipe end on the supply side by the flow of gas. It will be easily understood that the liquid dripping is effective for improving the working environment.

The problem of difficulty in cleaning at the receiving end is as follows.
The nozzle opening on the supply side is located downstream after passing through the ball valve on the receiving side, and the structure is such that the liquid does not substantially adhere to the ball valve and the upstream side thereof. Therefore, the risk of contamination due to mixing of the liquids to be handled has been significantly reduced.

The connecting device of the present invention has a simple structure, including a mechanism in which the flow path of the gas used for blowing off the residual adhesion liquid is sealed by its own flow.
By the cooperative operation of each part, the above-mentioned transfer can be performed in an airtight manner. The parts that make up the device need only be a combination of general-purpose device members, and there is no need to prepare special members, so the manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing each component of a liquid supply pipe connection device of the present invention.

FIG. 2 is a cross-sectional view similar to FIG. 1, showing a state in which pipes are connected by the apparatus of FIG. 1 and liquid is being transferred;

FIG. 3 is a cross-sectional view similar to FIG. 1, illustrating the removal of liquid remaining on the supply-side pipe end by gas flow after the transfer of liquid with the apparatus of FIG. 1 is completed.

FIG. 4 is a partially conceptual side view showing an example in which the connection device of the present invention is applied to a case where liquid is transferred from a transfer tank to a reactor of a multipurpose batch plant.

FIG. 5 is a side view of a main part showing a preferable mechanism for operating a three-way valve in the apparatus of FIG. 4;

[Explanation of symbols]

 A supply side part 11 three-way valve 12 insertion pipe 13 branch pipe 14 gas flow pipe B receiving side part 21 ball valve 22 passage in ball 23 gasket C gas supply part 31 gas supply valve 32 orifice 33 hollow ring 34 gas conduction pipe 4 reaction Container 5 liquid tank 6 transfer machine 61 lift 8 residual liquid adhering

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-194829 (JP, A) JP-A 62-28800 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B67D 5/00-5/60

Claims (2)

(57) [Claims] 1. An insertion tube which is a combination of the following parts A) to C): A) an insertion tube which is provided at a discharge end of a liquid container or a pipe and which has a sufficient length and protrudes below a three-way valve (11). (12) and a supply-side section provided with a gas flow pipe (14) bent downward from a branch pipe (13) extending to the side of the three-way valve; B) Receiving a liquid container or pipe A ball valve (21) at the end where the diameter of the passage (22) in the ball of the ball valve (21) is larger than the outer diameter of the insertion tube; ), And C) an orifice (32) above a gas supply valve (31) connected to a gas source, and further above the rubber supply valve (31) at least inwardly. Arrange the hollow ring (33) A gas supply portion formed by connecting a gas flow path in front of the air passage and the inside of the rubber hollow ring with a gas conducting pipe (34); when the insertion pipe is inserted into the ball valve, the gas flow pipe The liquid supply pipe connecting device is configured such that a distal end portion of the liquid supply pipe is located in the rubber hollow ring, and is configured to shut off the gas flow path from the outside air as determined by its expansion. 2. The connecting device according to claim 1, wherein the inner surface of the insertion tube on the supply side is coated with a fluororesin.