JP2000095021A - Tank truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank truck which can make the maintenance of a vapour valve simple and easy without needing entrance into a tank, apply to an air open/close type bottom valve and an upper part open/close operation type bottom valve commonly and unload even when the supply trouble of a pressurized air occurs in application to the air open/close type bottom valve. SOLUTION: In this tank truck, the open/close of the vapour valve 4 for collecting vapour B and the open/close of the bottom valve 2 for unloading can be interlocked by the interlock mechanism 47 provided with a joint 46 and rod 13. The joint 46 of such interlock mechanism 47 for transmitting a vertical movement and turning is not connected and fixed with the lower end of the upper shaft 6 of the vapour valve 4 side and by the turning of the upper shaft 6, they can be displaced to the relation engagingly lockable to the upper direction and the relation uncapable of the engagingly locking and released the engagingly locking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tank lorry. That is, a volatile liquid is loaded in the tank,
It relates to tank lorries to be transported and unloaded.

[0002]

2. Description of the Related Art FIG. 7 is a longitudinal sectional view for explaining one example of this kind of conventional example, and FIG. 8 is a longitudinal sectional view of a main part for explaining another example of this kind of conventional example. FIG. The tank lorry for loading and transporting the volatile liquid A in the tank 1 is provided at the top of the tank 1 together with the bottom valve 2 for unloading the liquid A provided at the bottom of the tank 1. Conventionally, there is provided a vapor valve 4 of the recovery device 3 for recovering the gaseous vapor B generated from the liquid A unloaded at the unloading destination into the tank 1.

That is, in this type of tank lorry, the volatile liquid A loaded in the tank 1 is unloaded to an underground tank or the like of a gas station to be unloaded via the bottom valve 2, discharge pipe, discharge hose and the like. During the operation, the unloaded liquid A generates vapor as gaseous vapor in an underground tank or the like. The gaseous vapor generated from such a volatile liquid A has a danger of explosion, harmfulness, and danger of pollution. And need to be collected. Therefore, conventionally, in such a tank lorry, a collecting device 3 for collecting such gaseous vapor is additionally provided.
As a result, gaseous vapor generated in an underground tank or the like of a gas station to be unloaded at the time of unloading is collected in the tank 1 on the vehicle. The recovery device 3 includes a vapor valve 4 provided above the tank 1 on the tank lorry side, and a tank 1 having one end connected to the vapor valve 4.
The collection pipe above, a collection hose interposed between the other end of this collection pipe and an underground tank at the gas station, etc.
And so on.

Now, it is necessary that the vapor valve 4 of such a recovery device 3 be opened and closed in conjunction with the bottom valve 2 for unloading. That is, the bottom valve 2 of the tank 1 is switched from the closed state to the open state, and the unloading of the liquid A is started. At the same time, the vapor valve 4 is also switched from the closed state to the open state. It needs to be collected in the tank 1. Therefore, an interlocking mechanism 5 has conventionally been interposed between the bottom valve 2 and the vapor valve 4.

That is, as shown in FIGS. 7 and 8, a vertical upper shaft 6 is inserted into a vertical hole 8 formed in a valve body 7 of a vapor valve 4 and a snap ring fixed to the upper shaft 6. 9, the valve element 7 of the vapor valve 4 is mounted, and the vertical lower shaft 10 is attached to the bottom valve 2.
Was fixed to the valve body 11. The upper shaft 6 on the vapor valve 4 side and the lower shaft 10 on the bottom valve 2 side.
Can be interlocked via an interlocking mechanism 5 having a joint 12, a rod 13, and the like, so that the opening and closing of the vapor valve 4 and the opening and closing of the bottom valve 2 can be interlocked. In the drawing, 14 is a handle provided on the upper shaft 6 on the side of the vapor valve 4, 15 is a casing of the vapor valve 4, 16 is a spring for urging the valve body 7 to close, 17 is a valve hole, 18 is a valve seat, 19 is a casing 15
The vapor passages 20 and 21 formed therein are entrances and exits. 1, reference numeral 22 denotes a casing of the bottom valve 2;
3 is a screw hole of the casing 22, 24 is a valve hole, 25 is a valve seat, 26 is an outflow path of the liquid A formed in the casing 22, and 27 is an inflow port thereof.

Incidentally, as the opening / closing method of the bottom valve 2, the upper opening / closing operation type shown in the drawings or the air opening / closing type has conventionally been adopted. In any of these methods, when the bottom valve 2 is opened and closed, the vapor valve 4 is opened and closed following the interlocking mechanism 5 including the lower shaft 10 and the joint 12 and the upper shaft 6. It was like. For example, the upper opening / closing operation type shown in FIG. 7 is as follows. That is, by rotating the handle 14, the upper shaft 6, the interlocking mechanism 5, and the lower shaft 10
And the like, and the lower shaft 10 is rotated by the bottom valve 2.
The bottom valve 2 moves up and down based on the screwing relationship with the screw hole 23 of the casing 22, and the bottom valve 2 opens and closes by the valve body 11 moving up and down.
And the vapor valve 4 has an upper shaft 6 and a valve body 7,
The lower shaft 10 and the bottom valve 2 are moved up and down by the interlocking mechanism 5 to open and close.

Conventionally, in order to fulfill such a following and interlocking function, the joint 1 of the upper shaft 6 and the interlocking mechanism 5 has conventionally been used.
2 was integrally connected and fixed by a pin 28.
That is, in the interlocking mechanism 5 interposed to make the vapor valve 4 follow the bottom valve 2, first, the lower end of the rod 13 is connected to the upper end of the lower shaft 10 of the bottom valve 2 by the pin 28. And the joints 12 are integrally connected and fixed. At the same time, the upper end of the rod 13 was similarly integrally connected and fixed to the lower end of the upper shaft 6 on the vapor valve 4 side. That is, the upper end of the rod 13 is integrally connected and fixed to the joint 12 by the pin 28,
The lower end of the upper shaft 6 on the side of the vapor valve 4 was integrally connected and fixed to the joint 12 with a pin 28.

[0008]

The following problems have been pointed out in such a conventional example. As described above, conventionally, the upper shaft 6 on the vapor valve 4 side,
The interlocking mechanism 5 such as the joint 12 and the rod 13 and the lower shaft 10 on the bottom valve 2 side are integrally connected and fixed, and are integrated from the upper part to the bottom part of the tank 1. Therefore, when maintaining the vapor valve 4,
First, a worker enters the tank 1 and releases the connection between the lower end of the upper shaft 6 and the joint 12 of the interlocking mechanism 5.
Then, various maintenance of the vapor valve 4 was performed.

In other words, in this type of conventional example, it is essential to maintain the vapor valve 4 that the harmful and dangerous residual gas is likely to be generated during the maintenance of the vapor valve 4. An upper shaft 6,
First, the connection and fixation of the interlocking mechanism 5 interposed between the bottom valve 2 and the joint 12 are released by removing the pin 28. Then, the cover 29 on the upper surface of the casing 15 of the vapor valve 4 is removed, and the valve body 7 and the like inside the casing 15 are pulled up to the outside on the tank 1 together with the upper shaft 6, and then mounted under the valve body 7 and the valve body 7 below. Replacement of the packing 30 and other parts, repair of the inside, and other maintenance have been performed on the vapor valve 4. When such maintenance is completed, the valve 7 and the like are lowered again inside the casing 15 together with the upper shaft 6, and then the worker enters the tank 1 and the lower end of the upper shaft 6 and the interlocking mechanism 5 are moved. Joint 1
The two were integrally connected and fixed by the pin 28 and the joint 12.

As described above, in the conventional example of this kind, when the maintenance of the vapor valve 4 is performed,
It was necessary for a worker to enter. Therefore, it has been pointed out that the harm and danger caused by the residual gas, as well as the maintenance time and the time required for the operation, are required.

The present invention has been made in view of such circumstances, and has been made to solve the problems in the above conventional example.
For example, by using a pin and a notch, the lower end of the upper shaft on the vapor valve side and the joint of the interlocking mechanism interposed between the bottom valve side are not connected and fixed,
By rotating the upper shaft, it is possible to displace between a relation in which the valve can be locked in the upward direction and a relation in which the lock can be locked and the lock is released. The maintenance is simplified and simplified. Second, it can be applied to both the bottom valve of the air opening / closing type and the bottom valve of the top opening / closing operation type. Third, when it is applied to the bottom valve of the air switching type, It is an object of the present invention to propose a tank lorry capable of reliably unloading even when a supply trouble of compressed air occurs.

[0012]

The technical means of the present invention for solving such a problem is as follows. First,
Claim 1 is as follows. That is, the tank lorry according to the first aspect loads and transports a volatile liquid in the tank. A bottom valve for unloading the loaded liquid provided at the bottom of the tank, and a gaseous vapor generated from the liquid at the unloading destination at the time of unloading provided at the top of the tank. And a vapor valve of a collecting device for collecting into the tank. A vertical upper shaft is inserted through a vertical hole formed in the valve body of the vapor valve, and the valve body of the vapor valve is mounted on a snap ring fixed to the upper shaft. Further, a vertical lower shaft is fixed to a valve body of the bottom valve. The upper shaft and the lower shaft can be interlocked via an interlocking mechanism having a joint, so that rotation transmission and vertical movement transmission around the axis can be performed, thereby opening and closing the vapor valve. The opening and closing of the bottom valve can be interlocked. The upper shaft on the side of the vapor valve is rotatable around the axis from above the tank and operable to be pulled up. And, by the rotation of the upper shaft, between the lower end of the upper shaft and the joint of the interlocking mechanism, a relationship that can be locked in the upward direction, and a relationship in which the lock is disabled and unlocked in the upward direction, Is displaced. And
In this unlocked / unlocked relationship, the upper shaft can be pulled up independently.

[0013] Claim 2 is as follows. That is, the tank lorry according to the second aspect is the tank lorry according to the first aspect, wherein the bottom valve is of an air opening / closing type. That is, when the pressurized air is supplied, the lower shaft and its valve body are pushed upward and switched to open, and when the pressurized air is exhausted, the lower shaft and the valve body are biased by the interposed spring. The lower shaft and its valve body are pushed downward,
Switch to closed. The vapor valve moves up and down with the upper shaft and the valve body thereof being driven by the lower shaft and the valve body of the bottom valve via an interlocking mechanism having the joint.
It can be opened and closed.

[0014] Claim 3 is as follows. That is, the tank lorry according to the third aspect is the tank lorry according to the first aspect, wherein the bottom valve is an upper opening / closing operation type. That is, when the handle on the tank is rotated, the upper shaft on the vapor valve side, the interlocking mechanism including the joint, the lower shaft on the bottom valve side, and the like follow and rotate. By this rotation, the lower shaft moves up and down based on the screwing relationship between the bottom valve and the casing, and the bottom valve is opened and closed by the valve body moving up and down. I do. The vapor valve is characterized in that the upper shaft and its valve element move up and down by the valve element of the lower shaft and the bottom valve via an interlocking mechanism provided with the joint, and open and close. I do.

[0015] Claim 4 is as follows. That is, in the tank lorry according to the fourth aspect, in the tank lorry according to the first aspect, the lower end portion of the upper shaft on the side of the vapor valve and the joint of the interlocking mechanism are provided with a laterally provided pin on one of them. And, on the other hand, a notch formed correspondingly. The lower end portion of the upper shaft and the joint of the interlocking mechanism can be rotated between the pins and the cutout portions in the left-right direction by the abutment in the left-right direction. I have.
In addition, by the vertical contact between the pin and the notch, an upward locking is performed between the pins and the notch, and the contact between the pin and the notch in the upward direction is disabled or released. It is characterized in that it cannot be locked or unlocked upward from each other.

Claim 5 is as follows. That is, in the tank lorry according to the fifth aspect, in the tank lorry according to the first aspect, the vapor valve has a cover removably mounted on an upper surface of the casing, and the upper shaft penetrates a vertical hole formed in the cover. Has been inserted. Further, the vapor valve is characterized in that its valve body can be pressed against and separated from a valve seat on a peripheral edge of a valve hole formed on the casing side via a mounted packing.

The present invention has the following configuration. When unloading, the bottom valve is opened,
The volatile liquid in the tank is unloaded, and the vapor valve of the recovery device is opened, and the vapor generated from the volatile liquid unloaded at the unloading destination is collected in the tank. . And, the upper shaft on the vapor valve side and the lower shaft on the bottom valve side can be interlocked via an interlocking mechanism,
Rotation transmission and vertical movement transmission around the shaft are possible, so that the bottom valve and the vapor valve are interlocked. Also, the lower end of the upper shaft and the joint of the interlocking mechanism are not connected and fixed, but use, for example, a notch formed corresponding to a laterally provided pin, and the upper shaft is rotated by rotating the upper shaft. It can be displaced between a relationship that can be locked in the direction and a relationship that can not be locked / unlocked.

When the present invention is applied to an air opening / closing type bottom valve, when the bottom valve is opened / closed by pressurized air,
Following the vertical movement of the valve body and the lower shaft, the upper shaft and the valve body move up and down via the interlocking mechanism, and the vapor valve opens and closes. If the supply of pressurized air is hindered due to a trouble, the upper shaft is rotated and the lower end and the joint of the interlocking mechanism are set in a relationship that can be locked in the upper direction. By raising the shaft, the vapor valve is opened by the rise of the valve body, and the bottom valve is also opened by the rise of the valve body via the interlocking mechanism with the joint locked to the upper shaft and the lower shaft. Become.

Next, when the present invention is applied to an upper opening / closing operation type bottom valve, when the upper shaft is rotated, the lower shaft which is screwed to the bottom valve casing is rotated through an interlocking mechanism. The valve body moves up and down, and the bottom valve opens and closes. Following this vertical movement, the upper shaft and the valve body also move up and down via the interlocking mechanism to open and close the vapor valve.

In the maintenance of the vapor valve, first, the upper shaft is rotated to make the lower end and the joint of the interlocking mechanism have a relationship in which the lock is disabled or unlocked upward. Then, the cover on the upper surface of the casing of the vapor valve is removed, and the valve body and the like together with the upper shaft are lifted out of the tank and pulled out to perform maintenance.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1, FIG. 2,
3, 4, 5, 6, etc. are provided for explaining the embodiment of the present invention. FIG. 1 is a vertical sectional explanatory view of a vapor valve, an interlocking mechanism, and the like. FIG. 2 shows an example of the relationship between the notch on the lower end of the upper shaft and the pin on the joint side of the interlocking mechanism. (1) FIG. (2) is a cross-sectional explanatory view of the same state, FIG. (3) is a vertical cross-sectional explanatory view of a state in which it can be locked upward, and (4) is a cross-sectional view of the same state. FIG. FIG. 3 shows another example of the relationship between the notch on the lower end of the upper shaft and the pin on the joint side of the interlocking mechanism.
(1) is a vertical cross-sectional explanatory view of a state in which contact is impossible in an upward direction and the contact is released, (2) is a cross-sectional explanatory view of a joint-side pin and the like, and (3) is a cross-sectional view. FIG. 4D is an explanatory cross-sectional view of the upper portion of the notch on the lower end side of the upper shaft, and FIG.

FIG. 4 shows an example of the relationship between the pin on the lower end of the upper shaft and the notch on the joint side of the interlocking mechanism.
(1) FIG. 1 is a vertical cross-sectional explanatory view of a state in which contact is impossible in an upward direction and the contact is released, (2) FIG. The figure is a cross-sectional explanatory view of the lower part of the notch on the joint side, and the figure (4) is a cross-sectional explanatory view of the central part of the notch. FIG. 5 is an explanatory vertical sectional view of an air opening / closing bottom valve, and FIG. 6 is an explanatory vertical sectional view of an upper opening / closing operation type bottom valve. 9 is a side view of the tank lorry, FIG. 10 is a plan view of the tank lorry, and FIG. 11 is a rear view of an unloading state from the tank lorry.

The tank truck 31 carries and transports the volatile liquid A in the tank 1. A bottom valve 2 provided at the bottom of the tank 1 for unloading the loaded liquid A, and a gaseous vapor provided at the top of the tank 1 and generated from the liquid A at the unloading destination at the time of unloading. The vapor valve 4 of the collecting device 3 for collecting B into the tank 1
And comprising.

First, the tank lorry 31 will be outlined with reference to FIGS. The tank 1 is mounted and mounted on the chassis of the tank lorry 31, and the inside of the tank 1 is required to comply with the Fire Service Law. Are divided and divided into a plurality of small chambers, that is, seven tank chambers 33 in the example of FIG. 10 and four chambers in the example of FIG. Then, a volatile liquid A such as gasoline, light oil, or other oil is supplied from a storage tank in an oil tank through an inlet 35 provided in a manhole 34 above each tank chamber 33 (in an emergency or the like, Exceptionally,
Each of the tank chambers 33 is loaded into each of the tank chambers 33 using a pump (via the bottom valve 2 of each tank chamber 33).

The same kind of volatile liquid A (for example, gasoline) may be loaded in all the tank chambers 33, but different types are used for the front tank chamber 33 and the rear tank chamber 33. Liquid A (for example, gasoline may be loaded in each of the front tank chambers 33, and light oil may be loaded in each of the rear tank chambers 33), and different liquids A may be loaded in each of the tank chambers 33. In some cases, a plurality of types of volatile liquids A are mixed and loaded in the tank 1. Each of the tank chambers 33 is provided with a manhole 34 with an inlet 35 and a vapor valve 4 at the upper part, and the bottom valve 2 at the bottom part.

The tank lorry 31 loads and transports such a volatile liquid A in each tank chamber 33 of the tank 1 and unloads the destination, for example, a gas station 36.
Unloading to the underground tank 37 or the like, which is the receiving tank of the vehicle. The unloading from the tank 1 to the underground tank 37 of the gas station 36 or the like is performed by the bottom valve 2 of the tank chamber 33 to be unloaded, and then the discharge pipe 38 for unloading, one end of which is connected to the bottom valve 2.
And a discharge port 40 with a discharge valve 39 at the other end of the discharge pipe 38 located below the left and right sides and the rear end of the tank 1.
Then, at the time of unloading, the discharge hose 41 has one end connected to the discharge port 40, the other end of the discharge hose 41 is connected to the receiving port 42 of the underground tank 37 of the gas station 36 connected to the other end, and the underground pipe 43, etc. Is done.

As a method of unloading the tank lorry 31, a so-called centralized piping system and an independent piping system have conventionally been adopted. In the example of FIG. 9, a centralized piping system is adopted, and one end of the discharge pipe 38 is branched and connected to the bottom valve 2 of each tank chamber 33.
A discharge port 40 with a discharge valve 39 common to each tank chamber 33 is provided. On the other hand, in the independent pipe system, not only the dedicated bottom valve 2 but also the dedicated discharge pipe 38 and the discharge port 4 with the discharge valve 39 are provided for each tank chamber 33.
0 is provided. The underground tank 37 serving as a receiving tank of the gas station 36 is divided and divided according to the type of the volatile liquid A such as gasoline, light oil, or other oil. The port 42 is selectively connected. As the tank lorry 31, there are a monocycle type as shown in the figure and a trailer type in which a trailer on which the tank 1 is mounted is pulled by a tractor. In the figure, reference numeral 44 denotes a cab.
The tank lorry 31 shown in FIGS. 9, 10 and 11 has such a schematic configuration.

Next, the air opening / closing type bottom valve 2 will be described with reference to FIG. Representative examples of the opening / closing method of the bottom valve 2 include an air opening / closing method in FIG. 5 and an upper opening / closing operation method in FIG. 6 described later. And this air opening and closing type bottom valve 2
When the pressurized air P is supplied, the vertical lower shaft 10
And the valve body 11 fixed to the lower shaft 10 is pushed upward, is switched to open, and the pressurized air P is exhausted.
The lower shaft 10 is urged by the biasing force of the interposed spring 45.
The valve body 11 is pushed downward and is switched to the closed state. As will be described later in detail, the vapor valve 4 is configured such that the upper shaft 6 and its valve body 7 are provided with an interlocking mechanism 4 having a joint 46.
Via the lower shaft 10 and the valve element 11 of the bottom valve 2, it moves up and down, and opens and closes (see also FIG. 1).

Such an air opening / closing type bottom valve 2 will be described in more detail with reference to FIG. The outflow passage 26 is formed in the lower portion of the casing 22 that is the main body of the bottom valve 2, and the discharge port 48 on the side surface is connected to one end of the discharge pipe 38 (see also FIGS. 9 and 11). . Outflow channel 2
A valve seat 25 is formed on the periphery of the valve hole 24 on the upper surface of the valve 6. The upper part of the casing 22 has a cylindrical shape with a top, and an outlet channel 49 communicating with the outlet channel 26 through the valve hole 24 is formed therein, and an inlet 27 is formed on a side surface.
The outflow passage 49 communicates with the lower part of the tank chamber 33 of the tank 1 through the inflow port 27. Also, the casing 22
It is attached and fixed to the opening 50 at the bottom of the tank chamber 33 from below. The valve element 11 of the bottom valve 2 is disposed in the outflow passage 49 and has a substantially flange-shaped packing 5 attached to the lower end.
1, it can be pressed against and separated from the valve seat 25 of the casing 22 so that the valve hole 24 is opened and closed.
Thus, the bottom valve 2 can be opened and closed.

The opening and closing of the bottom valve 2 is performed by pressurized air P and a spring 45. First, a vertical lower shaft 10 is vertically fixed to the valve body 11, and the upper portion of the lower shaft 10 passes through an outflow passage 49 and a vertical hole 52 formed in the upper surface of the upper portion of the casing 22. , And extend into the tank chamber 33. The lower portion of the lower shaft 10 extends through the inside of the outflow passage 26, through a vertical hole 53 at the lower portion of the casing 22, and into a cylinder 54 attached below the casing 22. And the cylinder 54
Inside, a piston 55 is fixed to the lower end of the lower shaft 10, and the piston 55 partitions the inside of the cylinder 54 into upper and lower air chambers 56 and 57, and
It can move up and down while sliding on the inner surface. Cylinder 5
4 is provided with an air pipe 5 for supplying and discharging pressurized air P
8 are connected. Further, the spring 45 is interposed in a resilient state between the lower portion of the upper surface of the upper portion of the casing 22 and the upper portion of the valve body 11, and is urged downward so as to constantly press the valve body 11 on the valve seat 25. are doing. In the figure, reference numeral 59 denotes an O-ring externally fitted to the piston 55, and reference numeral 60 denotes a supply / exhaust port for the outside air of the upper air chamber 56.

Therefore, in the bottom valve 2 of the air opening / closing type, the valve body 11 is normally urged downward by the urging force of the spring 45, and the valve body 11 is moved via the packing 51 to the valve seat 25. It is pressed against the top. Thus, the valve hole 24 is normally closed by the valve body 11, and the bottom valve 2 is normally closed. On the other hand, pressurized air P is supplied via an air pipe 58,
When the pressurized air P is press-fitted into the lower air chamber 57 in the cylinder 54, the pressure in the air chamber 57 increases and the piston 5
5 is pushed upward, and the valve body 11 is pushed upward through the lower shaft 10 against the downward urging force of the spring 45, and the lower end of the valve body 11 and the valve seat 25 are separated and opened. As a result, the valve hole 24 is opened and the bottom valve 2 is opened, and the liquid A loaded in the tank chamber 33 flows into the inlet 27,
It flows to the discharge pipe 38 via the outflow path 49, the valve hole 24, the outflow path 26, the discharge port 48, and the like. The unloading is performed in this manner. The bottom valve 2 of the air opening / closing type shown in FIG. 5 is configured as described above.

Next, referring to FIG.
Will be described. In the bottom valve 2 of the upper opening / closing operation type, an interlocking mechanism including the upper shaft 6, the joint 46, and the rod 13 by rotating the handle 14 on the tank 1 (see also FIG. 1). 47
(See also FIG. 1), the lower shaft 10 and the like of the bottom valve 2 are rotated following the rotation. By such rotation, the lower shaft 10 moves up and down based on the screwing relationship between the bottom valve 2 and the casing 22, whereby the bottom valve 2 moves up and down the valve body 11, Open and close. As will be described in detail later, the vapor valve 4 includes an upper shaft 6 and its valve body 7.
Is an interlocking mechanism 47 having a joint 46 and a rod 13
Via the lower shaft 10 and the valve element 11 of the bottom valve 2 to move up and down to open and close (see also FIG. 1).

The bottom valve 2 of the upper opening / closing operation type will be described in more detail with reference to FIG. First, the casing 22, the outflow passage 26, the discharge port 48, the valve hole 24, the valve seat 25,
Outflow channel 49, inflow port 27, valve body 11, packing 51, etc.
Regarding the relationship between these and the tank chamber 33 and the discharge pipe 38, etc., for the bottom valve 2 of the air opening / closing type,
5 are the same as those described above with reference to FIG. The opening and closing of the bottom valve 2 of the upper opening / closing operation type is based on a screwing relationship between a screw hole 23 formed vertically on an upper surface of an upper portion of the casing 22 and a screw 61 screwed on a lower portion of the lower shaft 10. And done. The lower shaft 10 has an upper portion extending into the tank chamber 33, a lower portion reaching the outflow passage 49 in the casing 22 through the screw hole 23 of the casing 22, and a lower end fixed on the valve body 11. A screw 61 is threaded on the lower portion of the lower shaft 10, and the screw 61 is screwed into the screw hole 23 on the casing 22 side.

Therefore, in the bottom valve 2 of the upper opening / closing operation type, the handle 14 is turned forward and backward on the tank 1 so that the upper shaft 6, the joint 46 of the interlocking mechanism 47, the rod 13, etc. , The lower shaft 10 rotates forward and backward, and moves up and down due to the screwing relationship with the screw hole 23. Then, based on such vertical movement of the lower shaft 10, the valve body 11 moves up and down, separates and presses against the valve seat 25, and opens and closes the valve hole 24. Thus, the bottom valve 2 is opened and closed, and the unloading of the liquid A in the tank chamber 33 via the discharge pipe 38 is performed. The upper shaft 6 and the valve element 7 of the vapor valve 4 also move up and down via the rod 13 and the joint 46 of the interlocking mechanism 47 based on the vertical movement of the lower shaft 10 so that the vapor valve 4 opens and closes. (See also FIG. 1). The bottom valve 2 of the upper opening / closing operation type in FIG. 6 is configured as described above.

Next, the recovery apparatus 3 for the vapor B will be described with reference to FIGS. In the tank lorry 31, the gaseous vapor B generated from the unloaded volatile liquid A in the underground tank 37 of the unloading gas station 36 at the time of unloading is transferred to the unloaded tank chamber 33. A collecting device 3 for collecting is provided. The recovery device 3 for the vapor B includes a vapor valve 4, a recovery pipe 62, an adapter 63, a recovery hose 64, and the like. First, the collection hose 64 has its tip connected to the tip of a collection pipe 65 attached to an underground tank 37 to be unloaded at the gas station 36 when unloading. The base end of the collection pipe 65 is connected to the upper part of the underground tank 37. The base end of the collection hose 64 is connected to an adapter 63 provided at the rear of the tank 1 when unloading. The recovery pipe 62 is disposed on the tank 1 along the longitudinal direction, the rear end thereof is connected to the adapter 63, and is branched for each tank chamber 33.
Are connected to the upper portions of the tank chambers 33 through the fins. Therefore, the vapor B generated during the unloading, for example, in the underground tank 37 passes through the recovery pipe 65, the connected recovery hose 64, the adapter 63 on the tank lorry 31 side and the recovery pipe 62, and opens the vapor valve 4. From the bottom valve 2
Is opened to discharge the volatile liquid A to the tank chamber 33.
To be recovered. Vapor B shown in FIGS. 10 and 11
Of the collecting device 3 is as described above.

Next, the vapor valve 4 of the recovery device 3 will be described with reference to FIG. A flow path 19 is formed in the upper part of the casing 15 which is the main body of the vapor valve 4, and the inlet / outlet 20 on the side surface is connected to the collecting pipe 62 branched as described above. Valve hole 1 on the lower surface of flow path 19
A valve seat 18 is formed on the periphery of 7. The lower portion of the casing 15 has a bottomed cylindrical shape, and a flow path 66 communicating with the flow path 19 through the valve hole 17 is formed therein, and an entrance 21 is formed on a side surface. The flow path 66 communicates with the upper part of the tank chamber 33 through the entrance 21.
The casing 15 is attached and fixed to the opening 67 in the upper part of the tank chamber 33 from above.

The valve element 7 of the vapor valve 4 is disposed in the flow path 19 and can be pressed and separated on the valve seat 18 of the casing 15 via a substantially flange-shaped packing 30 mounted at the lower end. The valve hole 17 is opened and closed. Thus, the vapor valve 4 can be opened and closed. The spring 16 is interposed between the lower part of the cover 29 on the upper surface of the casing 15 and the upper part of the valve body 7 in a resilient state, so that the valve body 7 is always pressed down on the valve seat 18 so as to be pressed. It is energizing. The cover 29 on the upper surface that is opened at the upper part of the casing 15 is detachably attached with bolts 68 or the like.

The vertical upper shaft 6 is inserted through a vertical hole 69 formed in the cover 29, and the top of the upper shaft 6 projects above the cover 29, the casing 15, the tank 1, and the like. 14 are attached. Although the upper shaft 6 in the illustrated example is formed of a round bar, it is needless to say that a square bar may be used. A central portion of the upper shaft 6 is inserted into a vertical hole 8 formed in the valve body 7 in a flow path 19 of the casing 15, and is placed on a snap ring 9 fixed to the upper shaft 6. 7 is placed. An O-ring 59 is interposed between the vertical hole 8 of the valve body 7 and the upper shaft 6, and the two are sealed and can be individually rotated. Not a relationship.

Then, the upper shaft 6 and the lower shaft 10 on the side of the bottom valve 2 are connected to the joint 46 and the rod 1.
3 and the like, can be interlocked via an interlocking mechanism 47, and can transmit rotation about the axis and vertical movement, so that the opening and closing of the vapor valve 4 and the opening and closing of the bottom valve 2 can be performed. , Can be linked. That is, the vapor valve 4
Is normally driven by the opening and closing of the above-described bottom valve 2 of the air opening / closing type or the top opening / closing operation type, and can be opened / closed in conjunction therewith. The opening of the vapor valve 4 is performed against the urging force of the spring 16, and the closing of the vapor valve 4 is ensured by the urging force of the spring 16. The vapor valve 4 is configured as described above.

Next, FIG. 1, FIG. 2, FIG. 3, FIG.
The relationship between the upper shaft 6 and the joint 46 of the interlocking mechanism 47 will be described in detail. First, the interlocking mechanism 47
The rod 13 is provided with a rod 13 vertically passed through the inside of the tank chamber 33, and the lower end of the rod 13 is integrally formed with the upper end of the lower shaft 10 using the pin 28 and the outer cylindrical joint 12 in the tank chamber 33. It is connected and fixed (see also FIG. 7). At the same time, the upper end of the rod 13 is
Into the joint 46 from below, and
Are connected and fixed integrally. In the example shown in FIG. 1, such connection and fixing of the rod 13 and the joint 46 (further, the setting of the relationship between the joint 46 and the upper shaft 6 described below) is performed in the lower portion of the casing 15 of the vapor valve 4. Although the process is performed in the flow path 66, the process may be performed in the lower tank chamber 33 instead of the illustrated example. In FIG. 1, reference numeral 70 denotes a vertical hole. The vertical hole 70 is formed on the lower surface of the lower portion of the casing 15 of the vapor valve 4, and the rod 13 of the interlocking mechanism 47 is inserted therethrough. Then, the upper shaft 6 on the side of the vapor valve 4
The lower end and the upper part of the joint 46 of the interlocking mechanism 47 are provided with a horizontally provided pin C on one side and a correspondingly formed notch D on the other side. Regarding the relationship between the pin C and the notch D, etc.
This will be described in more detail with reference to the examples of FIGS. 1, 2, 3 and 4.

First, the example shown in FIGS. 1 and 2 will be described. In this example, a pin C is provided horizontally in the upper portion of the joint 46 having a cylindrical shape. In the illustrated example, the pin C is not provided in the center of the internal space of the joint 46 but is provided horizontally at a corner thereof. Fixed. At the same time, the lower end of the upper shaft 6 which forms the circular cross-section is configured as a balance serving notch D ₁ cutout is notched in a semicircular cross section, in the upper part of the joint 46 having a cylindrical shape, from above Has been inserted. And the lower end of the cutout remainder serving notch D _1, between the upper end, the rod 13 which is fixed to the joint 46 is capable of abutting with a small spacing E resides.

That is, when the valve body 11 and the lower shaft 10 on the bottom valve 2 side rise, the rod 13
Upper end, in contact with the notch remainder serving notch D ₁ the lower end of the lower end of the upper shaft 6, which regardless of in which (Note This enabled pushed, described below notch D ₂ the upper surface of the The pin C may be brought into contact with and pushed up). On the other hand, when the valve element 11 and the lower shaft 10 on the side of the bottom valve 2 are lowered, the notch portion D _{1, which} is the remaining notch at the lower end of the upper shaft 6, is caused by the urging force of the spring 16 as shown in the figure. In the state where the interval E exists. In this way, vertical movement is transmitted between the upper shaft 6 on the vapor valve 4 side and the lower shaft 10 on the bottom valve 2 via the rod 13 and the joint 46 of the interlocking mechanism 47. I have.

The notch D _{1, which} is the remaining notch at the lower end of the upper shaft 6 cut in a semi-circular cross section, is a part thereof (in the illustrated example, the upper part of the notch D _{1 having} a semi-circular cross section). ) Is further cut laterally in a concave shape, and a notch D ₂ as a notch space is formed.
Are formed. The cutout space serving notch D ₂ of the upper shaft 6 side, the pin C of the joint 46 side of the interlocking mechanism 47 described above, correspond located at a height level. Therefore, when the upper shaft 6 is rotated in the counterclockwise direction (that is, in the opening direction), as shown in FIGS. part D ₁ contact side and the pin C of the joint 46 side are brought, by further rotation on the shaft 6 in a counterclockwise direction, the counterclockwise direction of the rotation is transmitted therebetween. On the other hand, when the upper shaft 6 is rotated 90 degrees clockwise (that is, in the closing direction) from the state described above, FIG.
(4) As shown in the figure, the cutout space serving notch D ₂ sides of the upper shaft 6 (cutout remainder serving notch D ₁ side) in contact with the pin C of the joint 46 side are brought further By rotating the upper shaft 6 clockwise, clockwise rotation is transmitted between the two.

In this manner, the upper shaft 6 on the vapor valve 4 side and the lower shaft on the bottom valve ₂ are passed through the pins C of the joint 46 of the interlocking mechanism 47 and the notches D ₁ and D ₂ of the upper shaft 6. 10, rotation transmission in the clockwise direction (close direction) and the counterclockwise direction (open direction) are performed. That is, the lower end of the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are rotated in the left and right directions around the axis by the contact between the pin C and the notches D ₁ and D _{2 in} the left and right directions. Dynamic transmission is possible.

The upper shaft 6 of the vapor valve 4 is rotatable around the axis by the handle 14 from above the tank 1, that is, above the tank chamber 33, and is also capable of being lifted. That is, by the rotation of the upper shaft 6, the space between the lower end portion of the upper shaft 6 and the joint 46 of the interlocking mechanism 47 is shown in FIG.
As shown in FIG.
As shown in FIGS. 2 (1) and 2 (2), etc. in FIG. 2, it is displaced upward to a locked / unlocked relationship, and in this locked / unlocked relationship, The upper shaft 6 can be raised independently.

In the example shown in FIGS. 1 and 2, when the upper shaft 6 is rotated clockwise, (3) in FIG.
FIG, (4) as shown in the figure, can space serving cutout notch on the shaft 6 side portion D ₂ lower face (notched remainder serving notch D
₁ ) and the pin C on the joint 46 side can be locked in the vertical direction. That is, the notch D, which is the notch space
_{(2) The} upper shaft 6 and the joint 46 of the interlocking mechanism 47 are locked in the upper direction by the vertical contact between the lower surface and the pin C, and the joint of the interlocking mechanism 47 is pulled up by pulling up the upper shaft 6. It is also possible to raise the lower shaft 10 and the valve body 11 via the bottom valve 2 via the 46 and the rod 13. As described above, the upper shaft 6 on the side of the vapor valve 4 is also connected via the interlocking mechanism 47 from this surface.
, And the lower shaft 10 on the side of the bottom valve 2.

On the other hand, when the upper shaft 6 is rotated counterclockwise, as shown in FIGS. 1 and 2 (1) and (2), the remaining portion of the upper shaft 6 is notched. upcoming and side notches D _1, stops at the pin C of the joint 46 side is abutting, the pin C and notches D _1, D _2, becomes abut a condition not upward, those Disconnected. In this manner, the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are unlocked and unlocked, so that the upper shaft 6 is connected to the joint 46 of the interlocking mechanism 47 or the rod 13.
Further, the lower shaft 10 is separated from the lower shaft 10 so that only the upper shaft 6 can be pulled up to the tank 1 alone. The example shown in FIGS. 1 and 2 is as described above.

Next, the example shown in FIG. 3 will be described. In the example of FIG. 3, as shown in FIG. 1A and FIG.
The pin C is horizontally erected and fixed at the center of the internal space of the joint 46. or,
As shown in FIGS. (1), (3), and (4), the lower end of the upper shaft 6 having a circular cross section is a notch space in the form of a vertically grooved groove extending upward from the lower end. out portion D ₃ is formed in the center. Then, the vertically split groove-shaped notch upper end of the space serving notch D _3, communicates with the space serving notch D _4-out expansion hole-like cutouts of the lateral is formed. Then, the lower end of the upper shaft 6 is inserted into the upper part of the cylindrical joint 46 from above.
Through the cutout space serving notch D ₃ of the upper shaft 6, the notch space serving notch D _4, the pin C of the joint 46 side are brought position. The distance E between the upper shaft 6 and the rod 13 and the distance between the upper shaft 6 and the lower shaft 10
The vertical motion transmission between them is the same as described above with reference to the examples of FIGS.

[0049] Therefore, if is rotated on the shaft 6 in the clockwise or counterclockwise direction, the left and right side end of the upper shaft 6 side cutout space serving notch D ₄ of the pin C of the joint 46 side Are brought into contact with each other and further rotated, so that the rotation is transmitted between them. Thus, the notch D ₄ of the upper shaft 6 and the joint 4 of the interlocking mechanism 47
6 through the pin C of the upper shaft 6 on the vapor valve 4 side.
, And the lower shaft 10 on the side of the bottom valve 2 is capable of transmitting rotation in the left-right direction around the axis.

Further, the upper shaft 6 on the side of the vapor valve 4 is rotatable around the axis from above the tank 1, that is, above the tank chamber 33, and is also capable of being pulled up. First, when rotated on the shaft 6 from the state (1) of FIG. 3 to the left and right, left and right portions of the upper shaft 6 side cutout space serving notch D ₄ of the pin C of the joint 46 side Can be locked by contact in the vertical direction.
In other words, the contact in the vertical direction between the right and left lower surface and the pin C of the cutout space serving notch D _4, the upper shaft 6 and the joint 46 of the interlocking mechanism 47 is locked in the upward direction, with, By pulling up the upper shaft 6, the lower shaft 10 and the valve body 11 on the bottom valve 2 side can also be raised via the joint 46 and the rod 13 of the interlocking mechanism 47. Communication is possible.

On the other hand, by rotating the upper shaft 6,
(1) As shown in FIG.
But so as to be positioned at the center of the upper shaft 6 cutout space serving notch of side D _4, that is, to be positioned directly above the upper shaft 6 cutout space serving notch of side D _3. As a result, the pin C and the notch portions D ₃ , D _{4 serving as the} notch spaces are in a state where they cannot contact in the upward direction, and the contact is released.
In this way, the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are unlocked and unlocked, so that the upper shaft 6 is connected to the joint 46 of the interlocking mechanism 47, the rod 13 and the bottom valve 2. The upper shaft 6 is separated from the lower shaft 10 on its side, and only the upper shaft 6 can be pulled up to the tank 1 alone. This is the case with the example shown in FIG.

Next, the example shown in FIG. 4 will be described. The example of FIG. 4 has a reverse relationship to the example of FIG.
A pin C and a notch D are provided. In the example of FIG. 4, as shown in FIG. 1 (1), FIG. 3 (3), and FIG.
The upper part of the joint 46 having a cylindrical shape, downward direction from the upper end side and notch space serving notch D ₅ of the two opposing vertical hole shape is formed, the notch spaces serving both switching of the vertical hole shape the lower end of the out portion D _5, communicates, widening the hole-shaped cutout space serving notch D ₆ to the left and right, are formed respectively. Further, as shown in FIGS. 1A and 1B, short pins C are horizontally provided at the lower end of the upper shaft 6 having a circular cross section, respectively. (Note that, regardless of the illustrated example, an example in which only one pin C is provided laterally and the notches D ₅ and D ₆ are formed one by one is also possible.) the lower end of the upper shaft 6 is inserted from above into the upper joint 46 having a cylindrical shape, in which the pin C of the upper shaft 6, through the space serving notch D ₅ notches joint 46 side, It is brought located cutout space serving notch D _6. The upper shaft 6
The vertical movement transmission between the upper shaft 6 and the lower shaft 10 with respect to the distance E between the shaft 13 and the rod 13 is the same as described above with reference to the examples of FIGS.

Therefore, when the upper shaft 6 is rotated clockwise or counterclockwise, the pin C on the upper shaft 6 side
Left and right side ends of the cutout space serving notch D ₆ of the joint 46 side abuts by further rotated, so that rotation between them is transmitted. Thus, the upper shaft 6 on the side of the vapor valve 4 is connected to the pin C of the upper shaft 6 and the notch D ₆ of the joint 46 of the interlocking mechanism 47.
Between the shaft and the lower shaft 10 on the side of the bottom valve 2 in the left-right direction about the axis.

Further, the upper shaft 6 on the side of the vapor valve 4 is rotatable around the shaft from above the tank 1, that is, above the tank chamber 33, and is also capable of being pulled up. First, when the upper shaft 6 is rotated left and right from the state shown in FIG. 4A, a pin C on the upper shaft 6 side and a notch D _{6 as a} notch space on the joint 46 side.
The left and right portions can be locked by contact in the vertical direction.
In other words, the contact in the vertical direction between the right and left upper surface of the pin C and cutout space serving notch D _6, the upper shaft 6 and the joint 46 of the interlocking mechanism 47 is locked in the upward direction, with, By pulling up the upper shaft 6, the lower shaft 10 and the valve body 11 on the bottom valve 2 side can also be raised via the joint 46 and the rod 13 of the interlocking mechanism 47. Communication is possible.

On the other hand, by rotating the upper shaft 6,
(1) As shown in the figure, the pin C on the upper shaft 6 side is
So as to be positioned at the center of the notch spaces serving notch D ₆ of the joint 46 side, that is, to be positioned directly above the space serving as the cutout portion D ₅ notches joint 46 side. Thus, the pin C the cutout space serving notch D _5, and D ₆ becomes a contact a condition not upward is released abutment.
In this way, the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are unlocked and unlocked, so that the upper shaft 6 is connected to the joint 46 of the interlocking mechanism 47, the rod 13 and the bottom valve 2. The upper shaft 6 is separated from the lower shaft 10 on its side, and only the upper shaft 6 can be pulled up to the tank 1 alone. This is the case with the example shown in FIG. The relationship between the upper shaft 6 and the joint 46 of the interlocking mechanism 47 shown in FIGS. 1, 2, 3, 4 and the like is as described above.

The present invention is configured as described above. Then, it becomes as follows. This tank truck 31
After the volatile liquid A is loaded and transported in the tank chamber 33 of the tank 1, it is unloaded to the unloading destination gas station 36 or the like. At the time of unloading, by opening the bottom valve 2 of the tank chamber 33 to be unloaded, the tank chamber 3 is opened.
The volatile liquid A loaded in 3 is unloaded to the underground tank 37 of the gas station 36 at the unloading destination,
In addition, when the vapor valve 4 of the recovery device 3 is opened, the vapor B generated from the volatile liquid A unloaded in the unloading underground tank 37 is stored in the tank chamber 33 during the unloading. (Figures 9 and 10,
See FIG. 11).

In the tank lorry 31, the lower end of the upper shaft 6 on the vapor valve 4 side and the lower shaft 10 on the bottom valve 2 side can be interlocked via an interlocking mechanism 47 having a joint 46. The rotation transmission and the vertical movement transmission of the circumference are possible, so that the opening and closing of the bottom valve 2 and the opening and closing of the vapor valve 4 are interlocked. Further, the lower end of the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are not connected and fixed, but use, for example, a notch D formed in correspondence with a horizontally provided pin C, and By the rotation of 6, it can be displaced into a relation in which it can be locked in the upward direction and a relation in which it can not be locked / unlocked (see FIGS. 1, 2, 3, 4 and the like). .

When the present invention is applied to a tank lorry 31 having an air opening / closing type bottom valve 2,
(See FIGS. 1 and 5) In this case, when the bottom valve 2 is opened and closed by the supply and exhaust of the pressurized air P by the air pipe 58 (the urging force of the spring 45 when the exhaust is further exhausted), the vertical movement of the valve body 11 and the lower shaft 10 In accordance with the movement, the upper shaft 6 and the valve element 7 on the vapor valve 4 side move up and down via an interlocking mechanism 47 provided with a joint 46 (in the case of a descent, based on the urging force of the spring 16). 4 also opens and closes. If the supply of the pressurized air P is not performed as expected due to some trouble, first, the tank 1, that is, the tank chamber 3
3 By operating the upper shaft 6 from above, the lower end of the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are brought into a relationship capable of being locked in the upward direction. Then, by slightly raising the upper shaft 6, the vapor valve 4 is opened by the elevation of the valve body 7, and the bottom valve 2 is also opened by the elevation of the valve body 11 via the interlocking mechanism 47 and the lower shaft 10. Become. When the upper shaft 6 is released, the vapor valve 4 is released.
Is closed by the lowering of the valve element 7 based on the urging force of the spring 16, and the bottom valve 2 is also closed by the lowering of the valve element 11 based on the urging force of the spring 45 via the interlocking mechanism 47 and the lower shaft 10. When it is applied to the bottom valve 2 of the air opening / closing type, it operates in this manner.

Next, the case where the present invention is applied to a tank lorry 31 provided with a bottom valve 2 of an upper opening / closing operation type will be described.
(See FIGS. 1 and 6) In this case, by rotating the upper shaft 6 from above the tank 1, that is, above the tank chamber 33, an interlocking mechanism 47 having a joint 46 is provided.
, The lower shaft 10 screwed with the screw hole 23 of the casing 22 of the bottom valve 2 rotates and moves up and down,
As a result, the valve element 11 moves up and down, and the bottom valve 2 opens and closes. The rotation is performed in a counterclockwise direction when opened and in a clockwise direction when closed. Then, following the vertical movement of the valve element 11 and the lower shaft 10 of the bottom valve 2, the upper shaft 6 and the valve element 7 of the vapor valve 4 move up and down via an interlocking mechanism 47 having a joint 46, The vapor valve 4 also opens and closes. When the present invention is applied to the bottom valve 2 of the upper opening / closing operation type, it operates in this manner.

In this manner, in the tank lorry 31, the opening and closing of the bottom valve 2 and the opening and closing of the vapor valve 4 are linked, and the unloading is performed. Meanwhile, in the tank lorry 31, maintenance of the vapor valve 4 is performed as follows (see FIG. 1). That is, during maintenance, first, the upper shaft 6 is rotated from above the tank 1, that is, the tank chamber 33, so that the lower end of the upper shaft 6 on the vapor valve 4 side and the joint 46 of the interlocking mechanism 47 are engaged in the upward direction. The relationship is unstoppable / unlocked. Then, the casing 15 of the vapor valve 4
The cover 29 on the upper surface is removed, and the valve body 7 and the like inside the casing 15 are pulled out together with the upper shaft 6 to the outside of the tank 1, that is, the outside of the tank chamber 33. And
For the vapor valve 4, maintenance such as replacement of various parts and repair of the inside is performed. Maintenance is performed in this way.

The tank truck 31 has the following first, second, and third conditions. First, when the maintenance of the vapor valve 4 is performed in the tank lorry 31, first, the upper shaft 6 is rotated by the handle 14 from above the tank chamber 33, and the lower end of the upper shaft 6 and the interlocking mechanism 47 are operated. And the joint 46 of FIG. 1 is in a relationship in which the lock cannot be locked or unlocked upward (see FIGS. 1 and 2).
(1), (2), (1) in FIG. 3, and (1) in FIG.
See figures). Then, the cover 2 on the upper surface of the casing 15
9 is removed, and the valve body 7 and the like inside the casing 15 are pulled up and pulled out together with the upper shaft 6 onto the tank chamber 33, thereby performing maintenance (see FIG. 1). As described above, it is not necessary to enter the tank chamber 33 of the tank 1.
Maintenance can be performed, and the vapor valve 4
Maintenance is simplified and facilitated.

Second, the upper shaft 6 and the interlocking mechanism 47
As described above, the relationship with the joint 46 of the bottom valve 2 of the air opening / closing type, the bottom valve 2 of the upper opening / closing operation type,
Commonly applicable. That is, the configuration of the pin C and the notch D in the lower end portion of the upper shaft 6 and the joint 46 of the interlocking mechanism 47 (see FIGS. 1, 2, 3, and 4 etc.) And a tank lorry 31 having an air opening / closing bottom valve 2 opened and closed by exhaust (FIG. 5).
), And can be commonly applied to a tank lorry 31 having a bottom valve 2 that is opened and closed by a rotation operation of a tank 1 from above a tank chamber 33 (see FIG. 6).

Third, when the present invention is applied to a tank lorry 31 further provided with an air opening / closing type bottom valve 2, supply of pressurized air P for opening / closing the bottom valve 2 is performed as expected due to some trouble. If not, as mentioned above,
By a manual rotation operation from above the tank chamber 33 of the tank 1,
The bottom valve 2 and the vapor valve 4 can be opened and closed in conjunction with each other.

That is, first, the upper shaft 6 is rotated from above the tank chamber 33 with the handle 14 so that the lower end of the upper shaft 6 and the joint 46 of the interlocking mechanism 47 are connected to the pin C or the notch D. (See FIGS. 1, 2, 3, 4, etc.). Then, the upper shaft 6 is slightly lifted up together with the handle 14 from above the tank chamber 33 to raise the valve element 7 to open the vapor valve 4 and to operate the joint 46 locked to the upper shaft 6. The lifting force is transmitted to the lower shaft 10 via the interlocking mechanism 47 such as the rod 13 and the like, whereby the lower shaft 10 and the bottom valve 2 are raised, and the bottom valve 2 is also opened (see FIGS. 1 and 5).

In the tank chamber 33, the handle 1
By releasing the hand from the upper part of the upper shaft 6 and releasing it, there is also a biasing force of the spring 16 and the upper shaft 6
Then, the valve element 7 descends, and the vapor valve 4 is closed. Further, the bottom valve 2 is also closed by the lowering of the upper shaft 6 via the interlocking mechanism 47 and the urging force of the spring 45, whereby the lower shaft 10 and the valve body 11 are lowered. In this way, even when a trouble occurs in the supply of the pressurized air P due to, for example, freezing of the air pipe 58 in winter, the bottom valve 2 and the vapor valve 4 can be opened and closed to unload. .

[0066]

As described above, the tank lorry according to the present invention uses, for example, a pin and a notch to interlock between the lower end of the upper shaft on the vapor valve side and the bottom valve side. The following effects are achieved by enabling the joint of the mechanism to be displaced between the lockable and unlockable / unlocked relationships by turning the upper shaft without connecting and fixing. Demonstrate.

First, there is no need to enter the tank, and the maintenance of the vapor valve is simplified and facilitated. In other words, in this tank lorry, the maintenance of the vapor valve is performed such that the lower end of the upper shaft and the joint of the interlocking mechanism are in a relationship in which the lower end of the upper shaft cannot be locked or unlocked upward, and then the cover on the upper surface of the casing is removed. This is performed by pulling up and pulling out the valve body and the like together with the upper shaft. That is, unlike the above-described conventional example of this type, the maintenance of the vapor valve is greatly simplified without the need for an operator to enter the tank for each maintenance of the vapor valve.

As described above, with respect to the vapor valve, the replacement of the valve body, the packing mounted under the valve body, other parts, the repair of the inside, and other maintenance can be performed without trouble. The required working time is greatly reduced. Also, since there is no need to enter the tank for maintenance, harmful and dangerous residual gas generated from the liquid loaded in the tank,
There is no danger of worker exposure and safety is improved.

Secondly, the present invention can be applied to both a bottom valve of an air opening / closing type and a bottom valve of an upper opening / closing operation type. That is, the present invention also provides a tank lorry having an air opening / closing bottom valve that is opened and closed by supply and exhaust of pressurized air, and also has an upper opening / closing operation bottom valve that is opened and closed by a rotation operation from above the tank. The same applies to tank trucks. In other words, in any case, when the lower shaft or the valve element moves up and down to open and close the bottom valve on the bottom valve side, it is driven by such up and down movement via an interlocking mechanism equipped with a joint, The upper shaft and valve body on the vapor valve side move up and down,
The vapor valve opens and closes. As described above, since the bottom valve of the air opening / closing type and the bottom valve of the top opening / closing operation type can be used in common, parts can be shared and the cost is excellent.

Third, when the present invention is applied to the bottom valve of the air opening / closing type, the unloading can be reliably performed even when a trouble of supplying the pressurized air occurs. In other words, when applied to a tank lorry equipped with an air opening / closing bottom valve, if supply of pressurized air for opening and closing the bottom valve is not performed as expected due to some trouble, manual operation from the tank By the turning operation, both the bottom valve and the vapor valve can be opened and closed.

That is, after the lower end of the upper shaft and the joint of the interlocking mechanism are brought into a relationship capable of being locked in the upward direction, by pulling up the upper shaft, the vapor valve is opened and the bottom valve is also opened. . When the upper shaft is released, the vapor valve closes and the bottom valve closes. Therefore, when the present invention is applied to an air opening / closing type bottom valve, it is possible to unload even if a supply trouble of pressurized air occurs. In other words, in a tank lorry having an air opening / closing type bottom valve of this type in the related art, when a supply trouble of pressurized air occurs, it is often impossible to unload, but in the present invention, Such defects are also eliminated. As described above, the effects exhibited by the present invention are remarkable and large, for example, the problems existing in this type of conventional example are surely solved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a tank lorry according to the present invention, illustrating a vapor valve, an interlocking mechanism, and the like, for describing an embodiment of the present invention.

FIG. 2 is a view for explaining an embodiment of the present invention, showing an example of a relationship between a notch on a lower end portion side of an upper shaft and a pin on a joint side of an interlocking mechanism; FIG. 2 is a vertical cross-sectional explanatory view of a state where contact is impossible in the direction and the contact is released, FIG. 2B is a cross-sectional explanatory view of the same state, and FIG. FIG. 4 (4) is an explanatory cross-sectional view of the same state.

FIG. 3 is provided for describing the embodiment of the present invention, and shows another example of the relationship between the notch at the lower end of the upper shaft and the pin on the joint side of the interlocking mechanism. FIG. 2 is a vertical cross-sectional explanatory view of a state in which contact is impossible in an upward direction and the contact is released, and FIG.
(3) is a cross-sectional explanatory view of the upper part of the notch on the lower end side of the upper shaft, and (4) is a cross-sectional explanatory view of the central part of the notch.

FIG. 4 is provided for describing the embodiment of the present invention, and shows an example of a relationship between a pin on a lower end portion side of an upper shaft and a notch on a joint side of an interlocking mechanism, and FIG. It is a longitudinal sectional explanatory view of a state where contact is impossible / contact is released,
(2) is a cross-sectional explanatory view of a pin or the like at the lower end of the upper shaft, (3) is a cross-sectional explanatory view of a notch lower portion on the joint side, and (4) is a central portion of the notch. FIG.

FIG. 5 is an explanatory longitudinal sectional view of an air opening / closing type bottom valve for explaining the embodiment of the invention.

FIG. 6 is an explanatory longitudinal sectional view of an upper opening / closing operation type bottom valve for explaining the embodiment of the present invention;

FIG. 7 is a longitudinal sectional view for explaining one example of this type of conventional example.

FIG. 8 is an explanatory longitudinal sectional view of a main part for explaining another example of this type of conventional example.

FIG. 9 is an explanatory side view of the tank truck.

FIG. 10 is an explanatory plan view of a tank truck.

FIG. 11 is an explanatory rear view of a state of unloading from a tank truck.

[Explanation of symbols]

Reference Signs List 1 tank 2 bottom valve 3 recovery device 4 vapor valve 6 upper shaft 7 valve body 8 vertical hole 9 snap ring 10 lower shaft 11 valve body 14 handle 15 casing 17 valve hole 18 valve seat 22 casing 29 cover 30 packing 30 tank lorry 45 spring 46 joint 47 Interlocking mechanism A Liquid B Vapor C Pin D Notch D ₁ Notch D ₂ Notch D ₃ Notch D ₄ Notch D ₅ Notch D ₆ Notch P Pressurized air

Claims (5)

[Claims] 1. A tank lorry for loading and transporting a volatile liquid in a tank, comprising: a bottom valve provided at the bottom of the tank for unloading the loaded liquid; and an upper part of the tank. A vapor valve of a recovery device for recovering gaseous vapor generated from the liquid at the unloading destination at the time of unloading into the tank. The vertical upper shaft is provided with the vapor valve. The valve body of the vapor valve is placed on a snap ring fixed to the upper shaft while being inserted through a vertical hole formed in the valve body of the above, and the lower shaft of the vertical valve is connected to the valve of the bottom valve. The upper shaft and the lower shaft are fixed to a body, and can be interlocked with each other via an interlocking mechanism having a joint, so that rotation transmission and vertical movement transmission around an axis can be performed. Opening and closing the valve The opening and closing of the valve can be interlocked, and the upper shaft of the vapor valve side can be rotated around the axis from above the tank and can be pulled up, and by rotating the upper shaft, The position between the lower end of the upper shaft and the joint of the interlocking mechanism is displaced into a relation in which it can be locked upward and a relation in which it cannot be locked or unlocked in the upward direction. The tank lorry wherein the upper shaft can be lifted independently in the relationship where the stop is released. 2. The tank lorry according to claim 1, wherein the bottom valve is of an air opening / closing type, and when pressurized air is supplied, the lower shaft and its valve body are pushed upward. Switch to open and pressurized air is exhausted,
The lower shaft and its valve body are pushed downward by the urging force of the interposed spring, and are switched to the closed state. The vapor valve has the upper shaft and its valve body provided with the joint. A tank lorry which moves up and down by an interlocking mechanism in accordance with the lower shaft and the valve element of the bottom valve to open and close. 3. The tank lorry according to claim 1, wherein the bottom valve is of an upper opening / closing operation type, and by rotating a handle on the tank, the upper shaft of the vapor valve side, An interlocking mechanism having a joint, the lower shaft on the bottom valve side, and the like rotate following the rotation, and the rotation causes the lower shaft to rotate based on a screwing relationship with the casing of the bottom valve. The bottom valve is opened and closed by the valve body moving up and down, and the vapor valve is connected to the lower shaft via an interlocking mechanism in which the upper shaft or the valve body is provided with the joint. And a tank lorry that moves up and down following the valve element of the bottom valve to open and close. 4. The tank lorry according to claim 1, wherein the lower end of the upper shaft on the side of the vapor valve and the joint of the interlocking mechanism are provided with a laterally provided pin on one side and the other on the other side. And a notch formed correspondingly, and a lower end of the upper shaft and a joint of the interlocking mechanism,
The contact between the pin and the notch in the left-right direction enables the transmission of rotation in the left-right direction around the axis between the pin and the notch, and the contact between the pin and the notch in the vertical direction. As a result, the pins are locked in the upward direction, and the pins are not contacted or released in the upward direction between the pins and the notch portions. A tank lorry. 5. The tank lorry according to claim 1, wherein a cover is detachably attached to an upper surface of the casing of the vapor valve, and the upper shaft is inserted into a vertical hole formed in the cover. A tank lorry characterized in that the vapor valve has a valve body capable of being pressed against and separated from a valve seat at a peripheral edge of a valve hole formed on the casing side via a mounted packing.