JP2010083564A - Tanker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To visually achieve the accurate confirmation of the open/close state of a bottom valve by installing a valve position measuring tool at a ceiling side of an in-vehicle tank for inspecting the opening/closing state of the bottom valve. <P>SOLUTION: The valve position measuring tool 28 is installed on the ceiling 2c of the in-vehicle tank 2 near a valve tube 23 of a breather valve 21 for confirming the opening/closing state of the bottom valve 4 at the ceiling side. The valve position measuring tool 28 is equipped with a guide rod 33 which extends upward and downward in parallel with a valve stem 25 of the breather valve 21, a full-close position stopper 34 which is installed at the guide rod 33 in accordance with the full-close position of the bottom valve 4, a full-open position stopper 35 which is installed at the upper end side of the guide rod 33 in accordance with the full-open position of the bottom valve 4, and a measuring bar 36 which is installed at the guide rod 33 in such a way that it is displaced upward and downward between stoppers 34, 35 and measures an amount projected by abutting against a head 25a of the valve stem 25 at the tip side of an abutting piece 36b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tank lorry vehicle that is suitably used for transporting liquids such as gasoline and kerosene, and more particularly, a tank lorry vehicle that can confirm whether a bottom valve is open or closed on the ceiling side of an in-vehicle tank. About.

  In general, a tank truck that transports liquid fuel such as gasoline and kerosene is equipped with an in-vehicle tank having a plurality of liquid chambers that store liquid. On the bottom side of the in-vehicle tank, there is an air-operated bottom valve that is opened and closed by pressurized air supplied and discharged from the outside in order to discharge the internal liquid to the outside for each liquid chamber. (For example, refer to Patent Documents 1 and 2).

  In addition, a breathing valve that is opened and closed in conjunction with the bottom valve is provided at the ceiling of the in-vehicle tank in order to absorb a pressure change in the in-vehicle tank when the liquid is discharged. The breathing valve is provided so as to protrude upward from the upper surface of the valve cylinder provided on the ceiling of the vehicle-mounted tank, and is displaced upward when the bottom valve is opened, and is displaced downward when the valve is closed. Thus, it has a valve shaft that increases and decreases the protruding amount.

JP-A-10-194394 JP 2004-83015 A

  In this type of prior art tank truck, for example, when various oil liquids (liquids) such as gasoline, light oil or kerosene are loaded (discharged) from the liquid chamber of the in-vehicle tank into the underground tank of the gas station, etc. Pressurized air is supplied to an air cylinder or the like on the valve side to drive the bottom valve body to move upward, thereby opening the bottom valve. As a result, the internal oil liquid flows out from the liquid chamber of the in-vehicle tank toward the underground tank of the filling station, and the oil liquid is unloaded.

  Also, when such oil liquid loading and unloading work is completed, the bottom valve body is displaced in the valve closing direction by its own weight and a biasing spring by discharging pressurized air from the air cylinder. The body is seated on a valve seat plate, and the bottom valve body closes the opening (liquid passage) of the bottom valve case in a liquid-tight state.

  By the way, in the above-described conventional technology, the bottom valve body is driven to open and close by the air cylinder by supplying and discharging pressurized air to the air cylinder attached to the bottom valve from the outside by remote control. For this reason, there is an advantage that the operator can easily carry out the unloading operation of the oil liquid only by operating the lever or the switch, for example.

  However, since the opening and closing operation of the bottom valve is a simple manual operation, there is no response for the operator, and whether the bottom valve body is actually closed, that is, whether the bottom valve body is on the valve seat plate or not. It is difficult to know whether or not the user is seated reliably, and the unloading operation may be continued with a sense of anxiety, resulting in an extra burden on the operator.

  In particular, in an in-vehicle tank that stores oil such as gasoline, viscous substances such as gums contained in the oil accumulate on the peripheral wall of the bottom valve body, which may cause sliding displacement when the bottom valve body opens and closes. May cause adverse effects. If the opening and closing operation of the bottom valve body continues in such a state, the bottom valve body may not be able to move to the fully closed position only by its own weight and the biasing force of the spring. There is a problem of becoming.

  In view of this, various proposals have been made in the prior art to enable the opening and closing operations of the bottom valve body to be confirmed using a monitor or the like outside the in-vehicle tank. However, since an oil liquid such as gasoline is a flammable fluid, it is difficult to use an electrical sensor, equipment, etc., and there is a problem that severe restrictions are imposed on the explosion-proof safety.

  On the other hand, an operator of a tank truck climbs the ceiling of the in-vehicle tank before, for example, after loading and unloading the oil, and how much the valve shaft of the breathing valve provided on the ceiling protrudes from the upper end of the valve cylinder, for example. By visually checking whether the bottom valve is open or closed based on the amount of protrusion at this time, measures are taken.

  However, since the visual confirmation of the protruding amount is easily affected by the mood, feeling, surrounding environment or individual differences, it is not always possible to fully grasp the open / closed state of the bottom valve element. This is inadequate in securing the safety and reliability of the apparatus, and there is a problem that the burden on the operator cannot be reduced.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a valve position measuring tool for measuring the opening and closing operations of the bottom valve on the ceiling side of the in-vehicle tank. An object of the present invention is to provide a tank truck capable of accurately confirming the open / closed state of a valve visually, improving the safety and reliability of the apparatus, and reducing the burden on the operator. .

  In order to solve the above-described problems, the present invention provides a vehicle body, a vehicle-mounted tank that is mounted on the vehicle body and contains liquid therein, and an external device provided on the bottom side of the vehicle-mounted tank for discharging liquid from the vehicle-mounted tank. An air-operated bottom valve that is opened and closed by pressurized air supplied and discharged from the tank, and a bottom valve that is provided on the ceiling of the in-vehicle tank to absorb pressure changes in the in-vehicle tank when the liquid is discharged A breathing valve that opens and closes in conjunction with the valve, the breathing valve being provided on the ceiling of the in-vehicle tank, and the bottom valve projecting upward from the upper surface of the valve barrel. This is applied to a tank truck having a valve shaft that is displaced upward when the valve is opened and displaced downward when the valve is closed.

  The feature of the configuration adopted by the invention of claim 1 is that, in the ceiling portion of the on-vehicle tank, in order to confirm the open state and the closed state of the bottom valve on the ceiling side, in the vicinity of the valve cylinder of the breathing valve Provided with a valve position measuring tool that visually measures the protruding position of the valve shaft. The valve position measuring tool includes a guide rod that extends upward and downward in parallel to the valve shaft, and a fully open bottom valve. A fully open position stopper attached to the guide rod corresponding to the position, and a fully closed position attached to the guide rod located below the fully open position stopper corresponding to the fully closed position of the bottom valve. The base end side is displaceably mounted on the guide rod so that it is displaced upward and downward between the stopper and the fully closed position stopper and the fully open position stopper, and the distal end side is in contact with the distal end of the valve shaft and is in a protruding position. Consists of a measurement bar that measures It lies in the fact was.

  According to a second aspect of the present invention, the measuring bar of the valve position measuring tool is slidably fitted on the outer peripheral side of the guide rod, and can be displaced in the upward, downward and rotational directions along the guide rod. And a contact piece that extends from the outer periphery of the ring toward the outside in the radial direction and has a lower surface on the tip side that contacts the tip of the valve shaft.

  According to a third aspect of the present invention, the measurement bar is formed so that the upper surface of the contact piece portion and the upper surface of the ring portion are flush with each other.

  Furthermore, according to the invention of claim 4, the guide rod of the valve position measuring tool is mounted so as to be able to be tilted between the standing position and the falling position together with the fully closed position stopper, the fully opened position stopper and the measuring bar. In the standing position, the guide rod is raised so as to be parallel to the valve shaft, and in the overturned position, the guide rod is overturned so as to fall sideways toward the radially outer side of the valve shaft.

  As described above, according to the first aspect of the present invention, for example, when the air-operated bottom valve is opened to discharge (lubricate) the liquid in the vehicle tank toward the underground tank of the gas station, On the ceiling side, the breathing valve is opened in conjunction with the bottom valve. As a result, vapor (oil vapor) flows into the in-vehicle tank through the breathing valve from the underground tank, so that the in-vehicle tank can be prevented from having a negative pressure tendency even when the liquid is discharged. The pressure can be maintained (for example, about atmospheric pressure). The valve shaft of the breathing valve is displaced upward when the bottom valve is opened, and is displaced downward when the bottom valve is closed, so that the projecting position is changed, and the projecting amount is increased or decreased.

  Therefore, the operator can visually measure the protruding amount of the valve shaft using a valve position measuring tool provided on the ceiling of the in-vehicle tank, and confirm the opening and closing of the bottom valve from the protruding position at this time. Can be done on the ceiling side. That is, the fully closed position stopper and the fully opened position stopper of the valve position measuring tool are fixedly attached to the guide rod at positions adjusted in advance corresponding to the fully closed position and fully opened position of the bottom valve, respectively. And, when the bottom valve is closed, the amount of protrusion of the valve shaft is small, by checking whether the base end side of the measurement bar is in contact with the fully closed position stopper and the tip side is in contact with the tip of the valve shaft, Whether or not the bottom valve is normally closed can be known from the position of the measurement bar.

  At this time, if the tip end of the measuring bar comes into contact with the tip of the valve shaft, the amount of protrusion of the valve shaft is minimized, so that it can be determined that the bottom valve is normally closed. . However, when the tip side of the measuring bar does not run over the tip of the valve shaft and is lower than this tip, the bottom valve is not fully closed because the amount of protrusion of the valve shaft is not reduced to the minimum. It can be known from the position of the measurement bar that it has not returned to the position.

  On the other hand, when the bottom valve is opened when the amount of protrusion (protrusion position) of the valve shaft increases, the measurement bar is displaced upward along the guide rod, for example, the state where the tip side of the measurement bar rides on the tip of the valve shaft In this case, it is determined from the position of the measurement bar whether or not the bottom valve is opened to the normal fully opened position by visually confirming whether the base end side of the measuring bar is in contact with the fully opened position stopper. be able to. When there is a gap between the proximal end of the measuring bar and the fully open position stopper, the valve is not enlarged to the position where the protruding amount of the valve shaft is maximized. You can know what you are not doing.

  As a result, for example, an operator of a tank lorry vehicle can monitor the open / closed state of the bottom valve more accurately by visual observation using a valve position measuring tool simply by climbing to the ceiling of the vehicle-mounted tank. Therefore, the safety and reliability of the apparatus can be improved, and the burden on the operator can be reduced with certainty.

  According to the invention of claim 2, the measuring bar of the valve position measuring tool extends from the outer periphery of the guide rod to the outer peripheral side of the guide rod, and extends radially outward from the outer periphery of the ring portion. Since it is composed of the abutting piece part, the operator of the tank truck or the like climbs the ceiling part of the on-vehicle tank, for example, manually attaches the ring part of the measuring bar to the guide rod together with the abutting piece part. It is possible to visually measure the open / closed state of the bottom valve from the relative position between the tip of the valve shaft and the measurement bar (contact piece) simply by moving or rotating along the axial direction.

  In the invention of claim 3, since the upper surface of the contact piece and the upper surface of the ring portion are formed to be the same surface, for example, when the bottom valve is opened, the ring portion of the measuring bar and the fully open position stopper It is possible to easily confirm whether there is a gap between the two and the confirmation work for knowing whether the bottom valve is normally opened or not can be performed with improved visibility.

  Furthermore, the invention of claim 4 is configured such that the guide rod of the valve position measuring tool is attached to the ceiling portion of the in-vehicle tank together with the fully closed position stopper, the fully opened position stopper, and the measuring bar so as to be tiltable. When the vehicle is traveling, etc., the valve position measuring tool can be prevented from protruding upward from the ceiling side of the in-vehicle tank by causing the guide rod of the valve position measuring tool to fall from the standing position to the falling position. We can observe laws and regulations such as traffic laws and firefighting laws. When arriving at the gas station and carrying out the loading and unloading operation, the operator climbs to the ceiling of the vehicle tank and moves the guide rod of the valve position measuring tool from the overturned position to the standing position by hand or toes. By starting up, it is possible to easily measure the opening and closing positions of the bottom valve.

  Hereinafter, a tank truck according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10 of the accompanying drawings.

  In the figure, reference numeral 1 denotes a vehicle body of a tank truck, 2 denotes an in-vehicle tank mounted on the vehicle body 1, and the in-vehicle tank 2 has an oil chamber (in FIG. 1) having a plurality of liquid chambers inside by a partition plate 2A or the like. In FIG. 2, only two oil chambers A and B are shown), and in these oil chambers A and B, for example, oils of different liquid types such as gasoline, light oil, kerosene, or chemicals such as toluene Is stored (stored). And the bottom valve 4 etc. mentioned later is provided in the bottom part 2B of the vehicle-mounted tank 2, and the below-mentioned breathing valve 21 etc. are provided in the ceiling part 2C side.

  3, 3,... Are cylindrical supply / exhaust ports (only two are shown in FIG. 1) provided in the bottom 2B on the lower surface side of the in-vehicle tank 2, and each supply / exhaust port 3 is shown in FIG. Thus, the upper end side opens into the oil chamber A (B), and the lower end side protrudes downward. A bottom valve case 5 described later is integrally attached to the lower end side of the supply / discharge port 3. Here, the supply / discharge port 3 constitutes a passage through which an oil liquid as a flammable fluid flows together with a bottom valve case 5 described later.

  4, 4,... Are air-operated bottom valves provided on the side of each supply / exhaust port 3 of the in-vehicle tank 2, and each bottom valve 4 includes a bottom valve case 5, a valve body guide 9, and a bottom valve, which will be described later. The body 10, the bottom valve shaft 11, the air cylinder 13 and the like are configured. The bottom valve 4 is opened and closed by the air cylinder 13 when pressurized air is supplied to and discharged from an air cylinder 13 to be described later.

  5, 5,... Are a plurality of bottom valve cases (only two are shown in FIG. 1) provided on the side of each supply / discharge port 3 of the in-vehicle tank 2, and the bottom valve case 5 is as shown in FIG. A thick valve seat plate 6 as a valve seat that is positioned on the upper side and extends annularly outward in the radial direction, and an annular shape integrally formed as a substantially L-shaped tube body on the lower side of the valve seat plate 6 The connecting flange 7 is used.

  In addition, a circular opening 6A that allows the oil chamber A (B) in the in-vehicle tank 2 to communicate with the connection flange 7 is provided at the center of the valve seat plate 6 that constitutes the valve seat. It has been. The upper side surface of the valve seat plate 6 surrounding the opening 6A is a valve seat surface 6B on which a bottom valve body 10 described later is seated. Here, the valve seat plate 6 of the bottom valve case 5 is abutted radially upward and downward from the valve seat surface 6B toward the supply / discharge port 3 side of the in-vehicle tank 2 so that the valve seat plate 6 A plurality of bolts (not shown) or the like are detachably fixed to the outlet 3 side.

  On the other hand, the connecting flange 7 of the bottom valve case 5 is connected to a branch pipe 19A or a branch pipe 19B of a supply / discharge pipe 19 which will be described later in order to supply and discharge oil and the like. That is, the supply / discharge pipe 19 is connected to the branch pipes 19A, 19B, for example, individually through the connection flange 7 of the bottom valve case 5 to the oil chambers A, B, etc. It is connected to one oil supply hose (not shown) on the gas station side.

  8 are a plurality of support columns provided on the valve seat plate 6 so as to surround the opening 6A of the valve seat plate 6, and these support columns 8 are stepped columnar as shown in FIG. It is formed by a rigid rod, and its lower end side is screwed to the valve seat plate 6 of the bottom valve case 5. Further, for example, about five support columns 8 are provided at a substantially constant interval in the circumferential direction of the valve element guide 9 in order to support a valve element guide 9 and the like described later on the valve seat plate 6 in a stable state.

  Reference numeral 9 denotes a valve body guide provided on the valve seat plate 6 and located in the in-vehicle tank 2, and the valve body guide 9 is formed in a covered cylindrical shape as a whole as shown in FIG. And the valve body guide 9 is arrange | positioned in the supply / exhaust port 3 by the some support | pillar 8, and becomes the structure which covers 6 A of opening parts of the valve seat board 6 from upper direction.

  10 is a bottom valve body for opening and closing the opening 6A of the valve seat plate 6. The bottom valve body 10 is slidably inserted into the valve body guide 9 on the outer peripheral surface side as shown in FIG. The lower end side is formed as a bottomed cylindrical body that is separated from and seated on the valve seat surface 6B of the valve seat plate 6. And the lower end side of the bottom valve shaft 11 mentioned later is fitted and fixed to the bottom center side of the bottom valve body 10 in a retaining state.

  Here, when the bottom valve body 10 is driven in the direction in which the rod 16 extends and contracts by an air cylinder 13 described later, the bottom valve body 10 slides up and down along the inner peripheral surface (sliding surface) of the valve body guide 9. Accordingly, the bottom side of the bottom valve body 10 is separated from and seated on the valve seat surface 6B of the valve seat plate 6. As shown in FIG. 2, the bottom valve body 10 seals between the valve seat plate 6 when seated on the valve seat surface 6B, and the opening 6A of the valve seat plate 6 is formed in the oil chamber A (B). Block against.

  Reference numeral 11 denotes a bottom valve shaft extending through the center side of the valve body guide 9 upward and downward. The bottom valve shaft 11 is slidably supported on the center side of the valve body guide 9 and has a lower end side thereof. Is fixed to the center of the bottom of the bottom valve body 10. The bottom valve shaft 11 is integrated with the bottom valve body 10 and is displaced upward and downward. Moreover, the upper end side of the bottom valve shaft 11 protrudes upward from the center side of the valve element guide 9, and the valve shaft of the breathing valve 21 is connected to the distal end side thereof via a push rod 20 (joint portions 20A, 20B) described later. 25.

  Reference numeral 12 denotes a spring as a spring member that urges the bottom valve body 10 in the valve closing direction. The spring 12 is formed of, for example, a coil spring, and is formed between the lid side of the valve body guide 9 and the bottom side of the bottom valve body 10. It is arranged in a compacted state between them. The spring 12 normally biases the bottom valve body 10 in the valve closing direction.

  Reference numeral 13 denotes an air cylinder as a bottom valve opening / closing means for opening and closing the bottom valve body 10. The air cylinder 13 is integrally formed on the connection flange 7 side of the bottom valve case 5 and is located above and below the bottom valve body 10. A cylinder cylinder 14 made of opposed short cylindrical tubes, a piston 15 slidably fitted into the cylinder cylinder 14 and having an interior defined by two air chambers C and D, and a lower end side of the piston 15 It is composed of a rod 16 which is fixed and protrudes upward from the cylinder cylinder 14 to a position where the upper end side comes into contact with the bottom valve body 10.

  Here, the cylinder cylinder 14 is provided with a pair of ventilation ports 17 and 18 spaced apart in the upward and downward directions, and these ventilation ports 17 and 18 are air pressures via a pair of air pipes, direction control valves, and the like. Connected to a source (neither shown). When the pressurized air from the air pressure source is supplied into the air chamber C through the ventilation port 17 and the pressurized air in the air chamber D is discharged from the ventilation port 18 to the outside, the piston 15 is in the cylinder cylinder 14. , And the rod 16 is contracted to the minimum as shown in FIG.

  On the other hand, when the pressurized air from the air pressure source is supplied into the air chamber D through the ventilation port 18 and the pressurized air in the air chamber C is discharged to the outside from the ventilation port 17 side, the piston 15 is connected to the cylinder cylinder 14. Since it moves upward (sliding displacement), the rod 16 extends greatly as shown in FIG. For this reason, the bottom valve body 10 slides upward in the valve body guide 9 along with the extension operation of the rod 16 and is separated from the valve seat surface 6 </ b> B of the valve seat plate 6. Thus, the oil chamber A (B) in the in-vehicle tank 2 communicates with the opening 6A side of the valve seat plate 6 by opening the bottom valve body 10.

  Next, 19 is a supply / discharge pipe as an external pipe in which the branch pipes 19A and 19B are connected to the connection flange 7 of each bottom valve case 5 as shown in FIG. The supply / discharge pipe 19 includes a plurality of branch pipes 19A and 19B (only two are shown) branched corresponding to the oil chambers A and B of the in-vehicle tank 2, and the branch pipes 19A and 19B. The common pipe portion 19C and the like gathered as a book pipe.

  The supply / discharge pipe 19 is located on the lower side of the on-vehicle tank 2 and is attached to the vehicle body 1 of the tank truck. For example, the branch pipes 19A and 19B are individually connected to the connection flange 7 of each bottom valve case 5, The common pipe portion 19C side is detachably connected to an oil supply hose (not shown) on the filling station side.

  20, 20,... Are push rods as valve connecting means provided in the oil chambers A and B of the in-vehicle tank 2, and these push rods 20 have lower ends on the front end side of the bottom valve shaft 11 shown in FIG. The upper end side is connected to a later-described valve shaft 25 via a similar joint portion 20B, for example, via a joint portion 20A such as a universal joint or a ball joint.

  The push rod 20 is driven upward and downward in conjunction with the upward and downward movements of the bottom valve shaft 11, thereby causing the later-described breathing valve 21 to be interlocked with the opening and closing operations of the bottom valve 4. is there. That is, when the bottom valve body 10 is driven upward together with the rod 16 by the air cylinder 13 and the bottom valve 4 is opened, the breathing valve 21 is also opened in conjunction with this.

  21 are respiration valves (only two are shown in FIG. 1) provided on the ceiling portion 2C of the in-vehicle tank 2, and these respiration valves 21 are provided for each oil chamber A, B of the in-vehicle tank 2. It is provided and is opened via the push rod 20 or the like when the oil liquid is supplied / discharged at each supply / discharge port 3 side. The breathing valve 21 when the valve is opened allows vapor (oil vapor) or air to flow into the oil chambers A and B, for example, from an underground tank (not shown) of the filling station, In addition to preventing the inside of the oil tank 2 from being in a negative pressure state, the oil liquid can be smoothly supplied and discharged from the oil chambers A and B.

  Here, as shown in FIGS. 3 to 6, the breathing valve 21 includes a covered cylindrical valve cylinder 23 attached to the ceiling portion 2 </ b> C of the in-vehicle tank 2 using a plurality of bolts 22, and a lower surface of the valve cylinder 23. The valve seat plate 24 is an annular flat plate that is provided on the inner side and has a vent opening 24A on the inner peripheral side, and extends upward and downward through the vent opening 24A of the valve seat plate 24 and upwards from the upper surface of the valve cylinder 23 And a later-described respiratory valve body 26 and the like.

  In this case, an annular flange portion 23A is provided on the outer peripheral side of the valve cylinder 23 as shown in FIGS. 5 and 6, and the flange portion 23A is, for example, a ceiling of the in-vehicle tank 2 using three bolts 22 or the like. It is detachably fixed to the part 2C side. Further, the valve cylinder 23 is integrally provided with a cylindrical vent 23B projecting radially outward. The vent 23B is detachably connected to, for example, a vapor recovery hose (not shown). This communicates with the underground tank of the gas station.

  On the other hand, the valve shaft 25 of the breathing valve 21 is connected to the bottom valve shaft 11 on the bottom valve 4 side via the push rod 20 and the like, and is displaced (driven) in the upward and downward directions in conjunction with the bottom valve shaft 11. The Further, a head 25A having a hexagonal shape, for example, is provided on the distal end side of the valve shaft 25, and this head 25A has an amount of protrusion from the valve cylinder 23 when the bottom valve 4 is closed as shown in FIG. Becomes smaller. However, when the bottom valve 4 is opened, the head portion 25A of the valve shaft 25 protrudes greatly from the upper surface of the valve cylinder 23, and the protruding amount increases as shown by a dimension H2 shown in FIG.

  Further, the valve shaft 25 is provided with an annular step portion 25B positioned in the middle of the axial direction, and the step portion 25B abuts on a later-described respiratory valve body 26 when the valve shaft 25 is displaced upward. Thus, the breathing valve body 26 is driven in the valve opening direction. Further, the push rod 20 described above is connected to the lower end side of the valve shaft 25 via a joint portion 20B.

  Reference numeral 26 denotes a breathing valve body provided in the valve cylinder 23 via a valve shaft 25. The breathing valve body 26 is slidably fitted on the outer peripheral side of the valve shaft 25 and contacts the annular step portion 25B. When in contact, the valve shaft 25 is opened and closed together with the valve shaft 25. Here, the breathing valve body 26 is normally urged in the valve closing direction by the valve spring 27, and the outer peripheral side of the lower surface of the breathing valve body 26 is seated on the valve seat plate 24.

  However, when the valve shaft 25 is displaced upward as shown in FIG. 8, the annular step portion 25 </ b> B comes into contact with the breathing valve body 26, and in this state, the breathing valve body 26 is opened against the valve spring 27. . At this time, the breathing valve body 26 is separated from the valve seat plate 24, and the oil chamber A (B) of the in-vehicle tank 2 is communicated with the underground tank of the filling station via the valve cylinder 23, the vapor recovery hose, and the like. The

  Reference numeral 28 denotes a valve position measuring tool for measuring the open / closed state of the bottom valve 4. The valve position measuring tool 28 has a bolt 22 on the flange portion 23A of the valve cylinder 23 as shown in FIGS. A fixed base 30 attached together with a mounting plate 29 via a hinge, a movable base 32 rotatably supported on the fixed base 30 via a hinge shaft 31, and a lower end side fixed to the movable base 32. The guide rod 33 includes an upper end side that is a free end and extends upward, and a fully closed position stopper 34, a fully opened position stopper 35, and a measuring bar 36, which will be described later.

  The attachment plate 29 of the valve position measuring tool 28 is attached so as to be integrated with the lower surface of the fixed base 30 as shown in FIG. 5 and FIG. It is detachably fixed on the flange portion 23A of the cylinder 23. Thereby, the fixed base 30 and the movable base 32 of the valve position measuring tool 28 are installed so as to extend in a substantially tangential direction along the outer peripheral side of the valve cylinder 23. Further, the valve position measuring tool 28 having such a structure can be easily installed later on the breathing valve 21 provided in the in-vehicle tank 2 of the current product.

  Here, since the valve position measuring tool 28 has the movable pedestal 32 mounted on the fixed pedestal 30 via the hinge shaft 31 so as to be rotatable, the guide rod 33 is integrated with the movable pedestal 32 and the hinge shaft 31 is used as a fulcrum. It is tilted between the standing position and the fall position. That is, the guide rod 33 of the valve position measuring tool 28 is raised so as to be parallel to the valve shaft 25 at the standing position shown by a solid line in FIG. 3, and in the falling position shown in FIG. It falls over to the outside so as to lie down to a position that is substantially horizontal (substantially parallel to the ceiling portion 2C of the vehicle-mounted tank 2).

  In this case, a weak spring member (not shown) or the like is built in between the fixed base 30 and the movable base 32, and the movable base 32 is held at two positions with respect to the fixed base 30 by the weak spring member. . The two positions at this time are set in advance by adjusting the standing position and the overturning position of the guide rod 33 shown in FIGS. 3 and 4.

  Reference numeral 34 denotes a fully closed position stopper (hereinafter referred to as a “closed side stopper 34”) attached to an intermediate portion in the axial direction of the guide rod 33, and the closed side stopper 34 is inserted into the outer peripheral side of the guide rod 33. And is fixed to the outer peripheral side of the guide rod 33 so that the position thereof can be adjusted by using a screw tool 34A such as a screw. Further, the upper surface of the closing stopper 34 is formed as a flat surface so that a measurement bar 36 (ring portion 36A), which will be described later, can contact uniformly. As shown in FIG. 2, the closing side stopper 34 is configured so that the ring 36 </ b> A of the measuring bar 36 contacts the upper surface side of the closing side stopper 34 when the bottom valve 4 is in the fully closed position. The position is adjusted and fixed to the outer peripheral side.

  Reference numeral 35 denotes a fully open position stopper (hereinafter referred to as an open side stopper 35) attached to the upper end side (the tip end side in the axial direction) of the guide rod 33. The open side stopper 35 is also inserted into the outer peripheral side of the guide rod 33. It is formed as a ring body, and is fixed to the outer peripheral side of the guide rod 33 using a screw tool 35A such as a screw so that the position can be adjusted. Further, the lower surface of the open-side stopper 35 is formed as a flat surface so that a measurement bar 36 (ring portion 36A), which will be described later, can contact uniformly. As shown in FIG. 7, the open side stopper 35 is arranged so that the ring rod 36 </ b> A of the measuring bar 36 contacts the lower surface of the open side stopper 35 when the bottom valve 4 is in the fully open position. The position is adjusted and fixed to the side.

  A measuring bar 36 is moved upward and downward along the guide rod 33. The measuring bar 36 is slidable on the outer peripheral side of the guide rod 33 as shown in FIG. A ring portion 36A that is fitted and displaced upward and downward along the guide rod 33, and protrudes so as to extend from the outer periphery of the ring portion 36A toward the radially outer side, and the lower surface on the tip (tip) side is the valve shaft 25 It is comprised by the elongate flat plate-shaped contact piece part 36B contact | abutted by the head 25A.

  And the upper surface of the contact piece part 36B is formed in the same plane so as to be located on the same plane as the upper surface of the ring part 36A. The ring portion 36 </ b> A of the measuring bar 36 is formed to have a larger outer diameter than the closing side stopper 34 and the opening side stopper 35. As a result, the measurement bar 36 can easily perform an operation of visually confirming the gap S when the gap S illustrated in FIG. 9 is formed between the ring portion 36A and the open side stopper 35. It is said.

  Here, the measuring bar 36 of the valve position measuring tool 28 is displaced upward and downward along the guide rod 33 between the closing stopper 34 and the opening stopper 35 and, for example, as shown in FIG. It is rotated around the rod 33 in the direction of arrow E or the like. At this time, the measurement bar 36 of the valve position measuring tool 28 is configured so that a gap S (see FIG. 9) is formed between the ring portion 36A and the open side stopper 35, or the front end side of the contact piece portion 36B is a valve. Whether the bottom valve 4 is open or closed is measured or inspected based on the amount of protrusion of the head 25A (dimensions H1, H2, etc.) depending on whether or not it contacts the head 25A side of the shaft 25 as shown in FIGS. Is.

  The tank truck according to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  First, in a state where each liquid (oil liquid or the like) is stored in the oil chambers A and B of the in-vehicle tank 2, for example, the oil liquid is discharged (supplemented) from the oil chambers A and B into the underground tank of the filling station. In some cases, an oil supply hose (not shown) or the like on the filling station side is connected to the common pipe portion 19C side of the supply / discharge pipe 19 connected in advance to the connection flange 7 of each bottom valve case 5.

  Next, in this state, a refueling operator (operator) or the like switches the direction control valve on the air pipe side and directs it from the air pressure source toward the air cylinder 13 on the bottom 2B (each bottom valve 4) side of the in-vehicle tank 2. When pressurized air is supplied by remote operation, the piston 15 of the air cylinder 13 is slid upward in the cylinder cylinder 14 due to the pressure difference between the air chambers C and D due to the pressurized air at this time.

  The piston 15 of the air cylinder 13 is displaced upward (integrated) together with the rod 16, so that the bottom valve body 10 can be driven in the valve opening direction against the spring 12. At this time, as shown in FIG. 7, the bottom valve body 10 is slid upwardly along the inner peripheral surface of the valve body guide 9, so that the valve opening operation of the bottom valve body 10 can be stabilized, and the bottom valve body 10 can be stabilized. The valve body 10 can be reliably driven so that the bottom side of the valve body 10 is separated from the valve seat surface 6B and the opening 6A of the valve seat plate 6 is opened.

  As a result, the oil chamber A or the oil chamber B in the in-vehicle tank 2 communicates with the opening 6A side of the valve seat plate 6 via a passage between the valve seat plate 6 and the valve body guide 9 or the like. Thus, the oil liquid in the oil chamber A (B) can be discharged into the underground tank through the connection flange 7 of the bottom valve case 5, the supply / discharge pipe 19, the oil supply hose of the oil filling station, and the like.

  At this time, the bottom valve shaft 11 of the bottom valve 4 is driven upward together with the bottom valve body 10, and the displacement of the bottom valve shaft 11 is performed via the push rod 20 (joint portions 20A, 20B). To the ceiling 2C side, that is, to the valve shaft 25 of the breathing valve 21. When the valve shaft 25 of the breathing valve 21 is displaced upward as shown in FIGS. 7 and 8, the annular step portion 25 </ b> B comes into contact with the breathing valve body 26. In this state, the breathing valve body 26 contacts the valve spring 27. The valve is opened against it.

  At this time, the breathing valve body 26 is connected to the underground tank of the gas station by connecting the vent 23B of the breathing valve 21 (valve cylinder 23) to, for example, an underground tank of a filling station via a vapor recovery hose (not shown). When separated from the seat plate 24, vapor (oil liquid vapor) or air can flow into the oil chamber A or the oil chamber B from the underground tank of the filling station, and the in-vehicle tank 2 is in a negative pressure state. And the oil liquid can be discharged smoothly from the oil chamber A or the oil chamber B.

  When the breathing valve 21 is opened in this way, the valve shaft 25 is displaced upward in the valve cylinder 23, and the head 25A protrudes greatly from the upper surface of the valve cylinder 23. 8 is increased by an amount corresponding to the lift amount corresponding to the opening degree of the bottom valve body 10 and the breathing valve body 26 as compared with the protrusion amount when the valve is closed (dimension H1 illustrated in FIG. 3). .

  On the other hand, in order to close the bottom valve body 10, for example, when air is discharged from the air chamber D of the air cylinder 13 while the supply of pressurized air into the air cylinder 13 is stopped by remote control, the spring 12 The bottom valve body 10 is driven downward integrally with the bottom valve shaft 11 by the urging force. The bottom valve body 10 is displaced (lowered) downward along the inner peripheral surface of the valve body guide 9 and the bottom valve shaft 11 is displaced downward along the center side of the valve body guide 9. The valve closing operation of the valve body 10 can be made smooth, and the bottom valve body 10 can be stably seated on the valve seat surface 6B of the valve seat plate 6 by the urging force of the spring 12.

  At this time, the displacement of the bottom valve shaft 11 is transmitted to the ceiling portion 2C side of the in-vehicle tank 2 via the push rod 20 (joint portions 20A, 20B), that is, to the valve shaft 25 of the breathing valve 21. As the valve shaft 25 is displaced downward, the breathing valve element 26 is biased downward by the valve spring 27. In this state, the breathing valve element 26 is seated on the valve seat plate 24 and held in the closed state. . The bottom valve body 10 of the bottom valve 4 is also urged downward by the spring 12, and the opening 6 </ b> A of the valve seat plate 6 can be closed.

  Thus, when the bottom valve body 10 is closed as shown in FIG. 2, the passage between the valve seat plate 6 and the valve body guide 9 is closed by the bottom valve body 10, and the opening 6 </ b> A of the valve seat plate 6 is closed. Therefore, the discharge of the oil liquid from the supply / discharge port 3 can be stopped reliably. Further, when the oil liquid is supplied from the outside into the oil chamber A or the oil chamber B of the in-vehicle tank 2, the bottom valve body 10 can be opened and closed in the same manner as when the oil liquid is discharged. In a state where the bottom valve body 10 is opened, the oil liquid is supplied into the oil chamber A (B) by a pump (not shown) or the like from the common pipe portion 19C side of the supply / discharge pipe 19 connected to the connection flange 7. It can be sent like a pump.

  By the way, the bottom valve body 10 that opens and closes the opening 6A of the bottom valve case 5 (valve seat plate 6) and supplies and discharges oil and the like is opened and closed by remote operation using the air cylinder 13. Therefore, for example, an operator who unloads oil knows whether or not the bottom valve body 10 is actually closed, for example, as an operation reaction force or response associated with manual opening or closing operation. I can't.

  Therefore, the operator can know whether or not the bottom valve body 10 is securely seated on the valve seat surface 6B on the valve seat plate 6 when the valve closing control of the bottom valve body 10 is performed by remote control. It may not be possible to continue the unloading operation with anxiety, which places an extra burden on the operator.

  In particular, in the in-vehicle tank 2 for storing an oil liquid such as gasoline, viscous substances such as gums contained in the oil liquid easily accumulate on the peripheral wall (cylinder part side) of the bottom valve body 10. It may adversely affect the sliding displacement between the valve body guide 9 when opened and closed. When the opening and closing operation of the bottom valve body 10 is continued in such a state, the bottom valve body 10 may not be able to move to the valve closing position only by its own weight and the urging force of the spring 12, and liquid leakage or the like may occur. It will cause the occurrence of.

  Therefore, in the present embodiment, the valve position measuring tool 28 is provided in the vicinity of the valve cylinder 23 of the breathing valve 21 in the ceiling portion 2C of the in-vehicle tank 2 in order to check whether the bottom valve 4 is opened or closed on the ceiling side. To the extent that the valve shaft 25 (head 25A) of the breathing valve 21 protrudes from the upper surface of the valve cylinder 23, that is, the protruding amount (dimensions H1, H2, etc.) of the head 25A is measured visually. .

  In this case, the valve position measuring tool 28 is fully closed and attached to the guide rod 33 corresponding to the fully closed position of the bottom valve 4 and the guide rod 33 extending upward and downward in parallel with the valve shaft 25 of the breathing valve 21. A position stopper (closed side stopper 34), a fully open position stopper (open side stopper 35) attached to the guide rod 33 and positioned above the closed side stopper 34 corresponding to the fully opened position of the bottom valve 4; A proximal-side ring portion 36A is movably attached to the guide rod 33 so as to be displaced upward and downward between the stopper 34 and the open-side stopper 35, and the distal end side of the contact piece portion 36B is the head of the valve shaft 25. The measuring bar 36 is configured to measure the protrusion amount (dimensions H1, H2, etc.) in contact with the portion 25A.

  Thereby, the operator of the tank truck uses the valve position measuring tool 28 to increase the protruding amount (dimensions H1, H2, etc.) of the valve shaft 25 (head 25A) while climbing the ceiling portion 2C of the in-vehicle tank 2. The bottom valve 4 can be confirmed to be opened or closed on the ceiling side based on the amount of protrusion (dimensions H1, H2, etc.) at this time.

  That is, at the time of actual inspection of the tank truck, the closing side stopper 34 and the opening side stopper 35 of the valve position measuring instrument 28 are adjusted in advance so as to correspond to the fully closed position and the fully open position of the bottom valve 4, respectively. The screw is fixedly attached to the guide rod 33 by screws 34A, 35A such as screws at the adjustment position. As shown in FIGS. 2 and 3, when the bottom valve 4 is closed, the protruding amount of the valve shaft 25 (head 25A) is reduced, the ring portion 36A of the measuring bar 36 comes into contact with the closing stopper 34, and comes into contact. Whether or not the bottom valve 4 is normally closed is confirmed from the position of the measuring bar 36 by checking whether or not the lower surface on the tip side of the piece 36B is in contact with the upper surface of the head 25A of the valve shaft 25. I can know.

  At this time, if the contact piece 36B of the measuring bar 36 comes into contact with the head 25A of the valve shaft 25 in contact with the head 25A, the head 25A of the valve shaft 25 has the original protruding amount (the minimum dimension H1 shown in FIG. 3). ), It can be confirmed by the measurement bar 36 that the bottom valve 4 is normally closed.

  For example, by rotating the measurement bar 36 around the guide rod 33 in this state, a contact sound is generated each time the contact piece 36B comes into contact with the head 25A of the valve shaft 25, thereby generating a contact sound. In addition, the bottom valve 4 can be confirmed to be closed. Note that the operator may move and rotate the measurement bar 36 manually, or may kick and rotate the measurement bar 36 with his / her foot.

  However, when the contact piece 36B of the measuring bar 36 does not ride on the head 25A of the valve shaft 25 as shown in FIG. 10 and is at a position lower than the head 25A, for example, the valve shaft 25 (head 25A) is not reduced to the height position of the original dimension H1, so that the bottom valve 4 has not returned to the normal fully closed position based on the relative position between the measuring bar 36 and the head 25A. I can know.

  On the other hand, when the bottom valve 4 is opened, the protruding amount of the valve shaft 25 (head 25A) becomes large as shown by the dimension H2 shown in FIG. The ring 36A of the measurement bar 36 comes into contact with the lower surface of the open stopper 35 by moving the contact piece 36B of the measurement bar 36 on the head 25A of the valve shaft 25. It can be confirmed visually. And when a clearance gap etc. do not generate | occur | produce between both, it can know from the position of the measurement bar 36 that the bottom valve 4 has opened to the regular full open position.

  However, when a gap S is generated between the ring portion 36A of the measuring bar 36 and the lower surface of the open side stopper 35 as illustrated in FIG. 9, the protruding amount of the valve shaft 25 (head 25A) is the original dimension H2. Since it does not increase to (maximum position), it is possible to know that the bottom valve 4 has not been greatly opened to the original fully opened position by visually checking the gap S at this time.

  As a result, for example, an operator of a tank truck can monitor the open / closed state of the bottom valve 4 more accurately by visual observation using the valve position measuring tool 28 only by climbing the ceiling portion 2C of the in-vehicle tank 2, for example, It is possible to easily know whether or not oil leakage has occurred on the bottom valve 4 side. Thereby, the safety | security, reliability, etc. of the apparatus with respect to the bottom valve 4 of air operation can be improved further, and an operator's burden can also be reduced reliably.

  Further, the measurement bar 36 of the valve position measuring tool 28 is formed so that the upper surface of the contact piece 36B is flush with the upper surface of the ring portion 36A, so that, for example, the measurement bar 36 is opened when the bottom valve 4 is opened. It is possible to know whether or not the bottom valve 4 is normally opened only by confirming whether or not there is a gap S between the ring portion 36A of the cylinder and the lower surface of the opening stopper 35. Confirmation can be easily performed.

  In particular, by forming the ring portion 36A of the measurement bar 36 to have a larger outer diameter (or a different outer shape) than the closing side stopper 34 and the opening side stopper 35, a gap S as illustrated in FIG. When formed between the ring portion 36A of 36 and the open side stopper 35, the operation of visually confirming the gap S can be performed more easily.

  And the state of the bottom valve 4 from the gap S at this time, that is, the viscous substance such as gum contained in the oil liquid in the in-vehicle tank 2 is accumulated on the peripheral wall (cylinder part side) of the bottom valve body 10, etc. The opening and closing operations of the bottom valve body 10 are affected, and it can be detected at an early stage that a malfunction or the like is starting to occur. Further, it is possible to know the necessary time for maintenance work or the like from the size of the gap S.

  Moreover, the valve position measuring tool 28 is mounted on the fixed base 30 so as to be rotatable via the hinge shaft 31, so that the valve position measuring tool 28 is guided together with the closing stopper 34, the opening stopper 35 and the measuring bar 36. The rod 33 can be tilted between the standing position and the falling position with the hinge shaft 31 on the movable base 32 side as a fulcrum. When the guide rod 33 of the valve position measuring instrument 28 is arranged in the standing position together with the closing side stopper 34, the opening side stopper 35 and the measuring bar 36 as shown by a solid line in FIG. 25, and when the vehicle is in the overturning position indicated by a two-dot chain line in FIG. 3 or a solid line in FIG. Can be overturned to a position substantially parallel to the ceiling portion 2C.

  For this reason, for example, when the tank truck is traveling, the valve position measuring tool 28 is moved upward from the ceiling portion 2C side of the in-vehicle tank 2 by causing the guide rod 33 of the valve position measuring tool 28 to fall from the standing position to the falling position. Projection can be suppressed and, for example, laws such as the Road Traffic Law and the Fire Service Law can be observed. When arriving at the gas station and carrying out the loading operation of the oil, the operator climbs the ceiling 2C of the in-vehicle tank 2 and raises the guide rod 33 and the like of the valve position measuring instrument 28 from the fall position to the standing position. Thus, the opening and closing of the bottom valve 4 can be measured quickly and easily.

  Therefore, in the present embodiment, by using the valve position measuring tool 28 provided on the ceiling 2C side of the in-vehicle tank 2, the amount of protrusion of the valve shaft 25 (head 25A) of the breathing valve 21 is visually measured. In addition, it is possible to easily and accurately confirm the open / closed state of the bottom valve 4 of the tank lorry vehicle, reduce the burden on the operator, and ensure explosion-proof safety against flammable fluids such as gasoline. .

  In the above embodiment, the case where the ring portion 36A of the measuring bar 36 is formed to have a larger diameter than the closing side stopper 34 and the opening side stopper 35 has been described as an example. However, the present invention is not limited to this. For example, the ring portion 36 </ b> A of the measurement bar 36 may be formed to have the same diameter as the closed side stopper 34, or may be formed to have a smaller diameter than the closed side stopper 34. Further, the ring portion 36 </ b> A may be formed to have the same diameter or a small diameter with respect to the open side stopper 35.

  Furthermore, the ring portion 36A of the measurement bar 36 may be formed in an outer shape (for example, a polygonal shape such as a quadrangle or a pentagon) different from the closing side stopper 34 and the opening side stopper 35. When a gap S is formed between the ring portion 36A and the open-side stopper 35, the operation for visually confirming the gap S can be easily performed according to different outer shapes.

1 is an overall configuration diagram showing a tank truck according to an embodiment of the present invention. It is a longitudinal cross-sectional view which shows the detailed structure of the bottom valve, breathing valve, and valve position measuring tool which were provided in the vehicle-mounted tank in FIG. It is a longitudinal cross-sectional view which expands and shows the respiratory valve in FIG. 2 with a valve position measuring tool. It is a longitudinal cross-sectional view in the same position as FIG. 3 which shows the state which fell the valve position measuring tool. It is the top view which looked at the respiratory valve in FIG. 3 from upper direction with the valve position measuring tool. FIG. 6 is a partially cutaway side view of the breathing valve and the valve position measuring device as seen from the direction of arrows VI-VI in FIG. 5. It is a longitudinal cross-sectional view in the same position as FIG. 2 which shows the valve position measuring tool in the state which the bottom valve and the breathing valve opened. It is a longitudinal cross-sectional view which expands and shows the respiratory valve in FIG. 7 with a valve position measuring tool. It is sectional drawing in the position similar to FIG. 8 which shows the valve opening poor state of a bottom valve and a breathing valve with a valve position measuring tool. It is sectional drawing in the position similar to FIG. 3 which shows the valve closing defect state of a bottom valve and a breathing valve with a valve position measuring tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Car-mounted tank 2A Partition plate 2B Bottom part 2C Ceiling part 3 Supply / exhaust port 4 Air operation type bottom valve 5 Bottom valve case 6 Valve seat plate 6A Opening part 6B Valve seat surface 7 Connection flange 10 Bottom valve body 11 Bottom valve shaft 12 Spring 13 Air cylinder 20 Push rod (valve connection means)
21 Breathing valve 23 Valve cylinder 25 Valve shaft 25A Head (tip of valve shaft)
26 Breathing Valve Body 27 Valve Spring 28 Valve Position Measuring Tool 30 Fixed Base 31 Hinge Shaft 32 Movable Base 33 Guide Rod 34 Fully Closed Position Stopper 35 Fully Open Position Stopper 36 Measuring Bar 36A Ring Part 36B Contacting Part

Claims (4)

A vehicle body, a vehicle-mounted tank that is mounted on the vehicle body and contains liquid therein, and is opened and closed by pressurized air that is provided on the bottom side of the vehicle-mounted tank and is supplied and discharged from the outside to discharge liquid from the vehicle-mounted tank. An air-operated bottom valve to be valved, and a breathing valve which is provided on a ceiling portion of the on-vehicle tank and is opened and closed in conjunction with the bottom valve so as to absorb a pressure change in the on-vehicle tank when the liquid is discharged And
The breathing valve includes a valve cylinder provided on the ceiling of the on-vehicle tank, and a valve that protrudes upward from the upper surface of the valve cylinder, and is displaced upward when the bottom valve is opened, and is displaced downward when the valve is closed. In a tank truck having a shaft,
On the ceiling of the in-vehicle tank, a valve that is arranged in the vicinity of the cylinder of the breathing valve and visually measures the protruding position of the valve shaft in order to confirm the open state and the closed state of the bottom valve on the ceiling side Provide a position measuring tool,
The valve position measuring tool is:
A guide rod extending upward and downward in parallel with the valve shaft;
A fully open position stopper attached to the guide rod corresponding to the fully open position of the bottom valve;
A fully closed position stopper attached to the guide rod and positioned below the fully open position stopper corresponding to the fully closed position of the bottom valve;
The base end side is displaceably attached to the guide rod so as to be displaced upward and downward between the fully closed position stopper and the fully open position stopper, and the distal end side comes into contact with the distal end of the valve shaft to measure the protruding position. A tank truck equipped with a measuring bar.   A measuring bar of the valve position measuring tool is slidably fitted on the outer peripheral side of the guide rod and is displaceable in the upward, downward and rotational directions along the guide rod, and the outer periphery of the ring portion The tank lorry vehicle according to claim 1, wherein the lower surface on the front end side extends radially outward from a contact piece portion that contacts the front end of the valve shaft.   The tank truck according to claim 2, wherein the measuring bar is formed so that an upper surface of the contact piece portion and an upper surface of the ring portion are flush with each other.   The guide rod of the valve position measuring tool is mounted so as to be able to rise and fall between the standing position and the overturning position together with the fully closed position stopper, the fully opened position stopper, and the measuring bar. 4. The tank truck according to claim 1, 2 or 3, wherein the tank lorry vehicle is configured to be tilted so as to fall sideways toward the radially outer side of the valve shaft at the fall position.

Images