JP2007132470A - Ball valve and gas-liquid transportation equipment using the ball valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel ball valve which prevents oil from being dipped up so as to be conveyed to a gas venting passage and discharged when switching from the condition to supply oil to the condition to bleed gas, and gas-liquid transportation equipment using the ball valve. <P>SOLUTION: In the ball valve, a valve element 24 provided with communication channels 22a to 22d extending in four crisscross directions and a partition wall 23 for partitioning the communication channels so that two pairs of adjacent communication channels respectively communicate with each other, is arranged in a valve box 21 including passages 20a to 20c extending in a T-shaped manner in three directions. By rotating the ball valve element 24, communication between two passages selected from the three ones of the valve box 21 can be switched. The ball valve is used in the gas-liquid transportation equipment. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ball valve and a gas-liquid transport device using the ball valve.

The gas-liquid transport device is used, for example, when supplying liquid fuel such as light oil to a tank truck or the like.
There is a danger of explosion if there is a lot of gas generated by vaporizing residual fuel in the tank of a tank truck when refueling. Therefore, before the refueling work, the gas is removed from the tank.

  The applicant of the present invention has previously proposed a gas-liquid transport device that enables the refueling operation to be started immediately after the degassing operation, so that the operation time can be reduced and remote operation or automatic control can be performed. (Patent Document 1).

  However, what is proposed in Patent Document 1 uses a general-purpose three-way L-shaped port ball valve (01) as shown in FIGS. When switching to the venting state, carry a part of the oil near the ball valve passage hole to the degassing passage side so that it can be scooped up with a handle when the ball valve body rotates. It may be discharged.

  4 and 5 are longitudinal cross-sectional side views of the main part of the ball valve (01) of the three-way L-shaped port, FIG. 4 shows a state during refueling, and FIG. 5 shows a state during degassing. Show.

  In FIG. 4, the ball valve body (02) communicates with the oil / liquid passage (04) and the oil / gas passage (05) in the valve box (03), and with both the passages (04) and (05). The gas passage (06) is in a non-communication state and is refueled in the direction of the arrow.

  When the ball valve body (02) is turned from the state shown in FIG. 4 to switch to the state shown in FIG. 5, the oil / gas passage (05) and the gas passage (06) communicate with each other. Both the passages (05), (06) and the oil liquid passage (04) are in a non-communication state, the oil supply is stopped, and gas venting is started in the direction of the arrow.

  Switching from the refueling state shown in FIG. 4 to the degassing state shown in FIG. 5 is performed by rotating the ball valve body (02) 90 degrees clockwise. The passage hole (07) in contact with the oil liquid in the ball valve body (02) scoops up a part of the oil liquid and carries it to the oil / gas passage (05) side, and the oil / gas passage (05 ) And the gas passage (06), there is a case where the phenomenon of discharging to the gas vent passage side occurs. There is a problem that the discharged oil liquid is sucked up by the suction force of the blower by gas purge, stays inside the fire prevention device or the like installed in the pipe, and is accumulated.

This problem cannot be solved by using a conventionally known three-way T-shaped port or four-way X-shaped ball valve instead of the three-way L-shaped ball valve.
No. 7-9839

  In view of the above-mentioned problems, the present invention, when switching from the state of refueling to the state of degassing, a new ball valve that raises the oil liquid and has no risk of being carried and discharged to the degassing passage side, An object of the present invention is to provide a gas-liquid transport device using this ball valve.

The above-described problems are solved by the invention having the following configuration, as shown in each of the claims.
(1) A ball valve that has four-way passage holes in a T-shaped valve box with three-way passages, and is partitioned by a partition wall so that only two adjacent passage holes communicate with each other. By providing a body and rotating the ball valve body, the ball valve can be switched so that the selected two-way passage among the three-way passages in the valve box communicates.

  (2) In the above item (1), the ball valve body is rotated 90 degrees clockwise and counterclockwise by the external operation unit, so that one of the three-way passages in the valve box is selected. It is possible to switch so that two-way passages communicate with each other.

  (3) Liquid transport pipe, liquid / gas transport pipe, and gas transport pipe are connected via the ball valve described in (1) or (2) above, and liquid transport is achieved by switching the ball valve. The pipe and the liquid / gas transport pipe communicate with each other, the state where the two transport pipes and the gas transport pipe are not communicated with each other, and the liquid / gas transport pipe and the gas transport pipe communicate with each other. It is possible to switch to a state where the pipe is not in communication.

  (4) In the above item (3), the liquid to be transported is one of light oil, kerosene, jet fuel, and petroleum solvent.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, when the ball valve according to the present invention is used as a valve for switching between the state of refueling and the state of degassing in the gas-liquid transport device, as will be described in detail later, When switching from the state of time to the state of degassing, the ball valve can be switched without directing the passage hole in the ball valve body facing the oil supply passage of the valve box to the degassing passage side. Therefore, there is no risk of scooping up the oil liquid and carrying it to the gas vent passage side.

  According to the second aspect of the present invention, it is possible to easily switch between the state at the time of refueling and the state at the time of degassing only by performing a 90-degree rotation capable of operating the air cylinder.

  According to the third aspect of the present invention, the oil liquid in the oil liquid passage is scooped up by being repeatedly switched from the refueling state to the degassing state, discharged into the degassing passage, and blower by gas purge. Thus, a gas-liquid transporting device can be obtained which is sucked up by the suction force and does not cause a problem of staying in a fire prevention device or the like installed in the pipe.

  According to invention of Claim 4, the gas-liquid transport apparatus which has the effect described in Claim 3 is obtained by making light oil, kerosene, jet fuel, a petroleum-type solvent, etc. into transport object.

  FIG. 1 is a conceptual side view of a gas-liquid transport device using a ball valve of the present invention.

  The ball valve (3) of the present invention is mounted above the liquid transport pipe (hereinafter also referred to as “oil supply pipe”) (2) erected on the base (1), and the left of the ball valve (3). In the lateral direction, a liquid and gas transport pipe (hereinafter also referred to as “oil supply and exhaust pipe”) (4), and in the upward direction, a gas transport pipe (hereinafter also referred to as “exhaust pipe”) (5), It is attached.

  An air cylinder (6) for switching the ball valve (3) is provided on the right side of the ball valve (3).

  An upper swivel (7) and a lower swivel (8) are mounted above and below the ball valve (3), respectively, and the ball valve (3) can be rotated in the horizontal direction together with the oil supply / exhaust pipe (4). It has become.

  The oil supply / exhaust pipe (4) attached to the ball valve (3) so as to be rotatable in the horizontal direction is dropped via a swivel (9), an outboat arm (15), and a bent swivel (10). The drop pipe (11) is connected to the pipe (11) and moved up and down via the vertical swivel (9) by the air cylinder (12), thereby omitting the lower end of the drop pipe (11). The oil supply is started after contacting the bottom of the tank.

An intake pipe (14) having an air suction port (13) is provided along the outboard arm (15) and is connected to a hemispherical seal plug (16) above the drop pipe (11). The hemispherical seal plug (16) includes a suction opening (17) in the lower part thereof, and when the hemispherical seal plug (16) is applied to the inlet of the tank, the suction opening (17) It opens toward the inside of the tank, and the intake pipe (14) communicates with the inside of the tank through the suction opening (17).
The exhaust pipe (5) communicates with the blower (18).

  2 and 3 are central longitudinal side views of the main part of the ball valve (3). FIG. 2 shows a state during refueling, and FIG. 3 shows a state during degassing.

  The ball valve (3) is formed into four cross-shaped passage holes (22a) (22b) (in a valve box (21) provided with T-shaped passages (20a) (20b) (20c) in three directions. 22c) and (22d) are provided, and only two adjacent sets of passage holes are constituted by a ball valve body (24) partitioned by a partition wall (23) so as to communicate with each other, and the ball valve body (24) Is rotated by an air cylinder (6) (see FIG. 1) which is an operation unit provided outside.

  Of the three passages (20a), (20b) and (20c) in the ball valve (3), the oil / liquid passage (20a) is connected to the oil supply pipe (2), and the oil / liquid passage (20b) is supplied to the oil supply / exhaust pipe. In (4), the gas passage (20c) is connected to the exhaust pipe (5).

  In the state at the time of oil supply shown in FIG. 2, the oil supply pipe (2) and the oil supply / exhaust pipe (4) communicate with each other, and these both pipes and the exhaust pipe (5) do not communicate with each other.

  As indicated by the arrows F1 and F2, the oil supply operation is performed by supplying oil liquid pumped by a pump (not shown) to the oil supply pipe (2), the oil liquid passage (20a), the passage holes (22a) (22b), the oil It is made through the liquid / gas passage (20b) and the oil / exhaust pipe (4).

  When the ball valve body (24) is turned 90 degrees counterclockwise as indicated by the arrow A by the external air cylinder (6) from this state of refueling, the state is switched to the state of degassing shown in FIG. be able to.

  In this state, the oil supply / exhaust pipe (4) and the exhaust pipe (5) communicate with each other, and the both pipes and the oil supply pipe (2) do not communicate with each other.

  As shown by the arrows G1 and G2, the degassing operation is performed by suction of the blower 18 (see FIG. 1) connected above the exhaust pipe (5), and the oil supply / exhaust pipe (4), The gas passage (20b), the passage holes (22c) and (22d), the gas passage (20c) and the exhaust pipe (5) are used.

  In order to change from the degassing state to the refueling state, the ball valve body (24) is rotated 90 degrees clockwise as indicated by the arrow B by the external air cylinder (6). It will be in the state at the time of oil supply shown in 2. FIG.

  The major feature of the ball valve (3) of the present invention is that, as described above, when switching from the oil supply state to the gas release state, the oil liquid is sprinkled up and carried to the gas release passage side for discharge. There is no.

  That is, in order to switch from the refueling state to the degassing state, the ball valve body (24) is rotated 90 degrees counterclockwise as indicated by arrow A in FIG. Thus, the passage hole (22a) facing the oil supply passage (20a) during the refueling operation forms an oil / gas passage (20b) and a gas passage (20c) that form a gas vent passage as shown in FIG. ) Is not directed to either side.

  Therefore, there is no possibility that the passage hole (22a) facing the oil supply passage (20a) at the time of the oil supply operation scoops up part of the oil liquid and carries it to the gas vent passage side.

Next, a method for using the gas-liquid transport device shown in FIG. 1 will be described.
A tank of a tank truck (not shown) is stopped under the drop pipe (11) without exhausting.

  Next, the tank inlet is opened, the air cylinder (12) is operated, and the drop pipe (11) is inserted into the tank while the drop pipe (11) is moved up and down by the vertical swivel (9).

  The bent swivel (10) is inserted into the tank while the drop pipe (11) is always kept vertical when the drop pipe (11) is moved up and down by the vertical swivel (9). When the drop tube (11) is not used, the drop tube (11) is folded in the horizontal direction.

  Next, the ball valve (3) is driven by the air cylinder (6), and the oil supply / exhaust pipe (4) and the exhaust pipe (5) are communicated. By setting the blower (18) operation switch at the same time as this communication, the residual gas in the tank sucked from the drop pipe (11) is supplied to the oil supply / exhaust pipe (4) and the exhaust pipe. After (5), it is released into the atmosphere by the blower (18).

  Fresh air in the atmosphere is sucked in from the air suction port (13), passes through the intake pipe (14), and is provided in the suction opening (17) provided at the lower part of the hemispherical seal plug (16) above the drop pipe (11). ) Is supplied into the tank.

  Next, as soon as the degassing operation of the residual gas is completed, the ball valve (3) is operated by operating the air cylinder (6) to connect the oil supply / exhaust pipe (4) and the oil supply pipe (2), Refueling work can be started.

  When refueling is completed and refueling to another tank, prior to that, when the ball valve (3) is switched to the degassing state again, as described above, the ball valve of the present invention Because there is no risk of scooping up the oil liquid and carrying it to the gas vent passage side, for example, even if a fire prevention device is installed in the pipe from the ball valve (3) to the blower (18), There is no problem that the oil liquid sucked up by the suction force of the blower (18) stays in the fire prevention device or the like.

  The ball valve and the gas-liquid transport device of the present invention can be widely used for light oil, kerosene, jet fuel, petroleum-based solvents, and the like as transported liquids.

It is a side surface conceptual diagram of the gas-liquid transport apparatus using the ball valve of the present invention. It is a center vertical side view of the principal part in the ball valve of the present invention, and shows the state at the time of refueling. Similarly, it is a center longitudinal cross-sectional side view of the principal part in the ball valve of the present invention, and shows the state at the time of degassing. It is a center vertical side view of the principal part in the ball valve of a three-way L-shaped port, and shows the state at the time of refueling. Similarly, it is a center vertical side view of the principal part in the ball valve of a three-way L-shaped port, and shows the state at the time of degassing.

Explanation of symbols

(1) Base
(2) Oil supply pipe (liquid transport pipe)
(3) Ball valve
(4) Oil supply / exhaust pipe (liquid / gas transport pipe, first arm, inboard arm)
(5) Exhaust pipe (gas transport pipe)
(6) Air cylinder
(7) Upper swivel
(8) Lower swivel
(9) Vertical and lateral swivel swivels
(10) Bending swivel
(11) Drop tube
(12) Air cylinder
(13) Air suction port
(14) Intake pipe
(15) Outboat arm (oil supply / exhaust pipe, liquid / gas transport pipe, second arm)
(16) Hemispherical sealing plug
(17) Suction opening
(18) Blower
(20a) (20b) (20c) Passage
(21) Valve box
(22a) (22b) (22c) (22d) Passage hole
(23) Bulkhead
(24) Ball disc
(01) Ball valve
(02) Ball disc
(03) Valve box
(04) Oil liquid passage
(05) Oil / gas passage
(06) Gas passage
(07) Passage hole

Claims (4)

  A ball valve body that has four-way passage holes in a T-shaped valve box with three-way passages and that is partitioned by a partition so that only two adjacent passage holes communicate with each other is provided. A ball valve characterized in that, by rotating the ball valve body, it is possible to switch so that a selected two-way passage among the three-way passages in the valve box communicates.   By switching the ball valve body 90 degrees clockwise and counterclockwise by an external operation unit, the selected two-way passages are switched among the three-way passages in the valve box. 2. The ball valve according to claim 1, wherein the ball valve can be used.   A liquid transport pipe, a liquid / gas transport pipe, and a gas transport pipe are connected via the ball valve according to claim 1, and the liquid transport pipe and the liquid / gas transport pipe are switched by switching the ball valve. Are connected, the two transport pipes are not connected to the gas transport pipe, and the liquid / gas transport pipe is connected to the gas transport pipe, and the two transport pipes are not connected to the liquid transport pipe. In addition, the gas-liquid transport device can be switched.   4. The gas-liquid transport device according to claim 3, wherein the liquid to be transported is one of light oil, kerosene, jet fuel, and petroleum solvent.

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