JP2019059549A - Bottom valve of tank lorry - Google Patents

Abstract

To detect an opened valve state and a closed valve state of a bottom valve of a tank lorry.SOLUTION: A plurality of hatch are provided and a lubrication hose connection port of each hatch is connected to a discharge tube via a bottom valve and said bottom valve has a bottom valve opening and closing sensor 20, 21 for detecting that each bottom valve is in an opened state or in a closed state at the bottom valve of a tank lorry which is opening and closing driven by an air drive and a liquid detection sensor 24 is arranged at downward of the bottom valve. In addition, the bottom valve opening and closing sensor consists of a detection part at a valve body upper part of the bottom valve and a detected part at a housing body in which the valve body upper part is situated with said detection part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the structure of a bottom valve mounted on a tank truck.

Tank lorries are used as a means to deliver fuel oil from oil depots to filling stations. The tank lorry's tank is divided into a plurality of hatches, and each hatch can be loaded with a fuel oil different from regular gasoline, light oil and kerosene according to the delivery destination order.
The tank plow car is connected to a common pipe below each hatch via a bottom valve, and is unloaded from the common pipe to the underground tank for each oil type of the gas station by opening the bottom valve.

  As such a bottom valve, what is indicated in patent documents 1 can be raised. That is, the valve body that can be seated on the upper surface side of the peripheral edge of the oil supply hose connection port of the tank, the cylinder member that moves up and down with air pressure and moves up and down integrally with the valve body, and the inner peripheral side of the cylinder member A piston sliding relative to the air chamber, a hollow shaft communicating with the air chamber and having the piston fixed at an upper portion, and loaded between the piston and the valve body, the valve body (cylinder member) It is comprised by the spring urged | biased in the valve closing direction.

  Since this bottom valve does not have a function to detect that the hatch is completely empty when unloading has been completed, the operator has risen to the top of the hatch and the inside of the hatch has been visually checked. The upper part of the hatch has a risk of falling of workers at high places.

In order to solve such a problem, a technique described in Patent Document 2 has also been proposed.
That is, it has entered an unloading detection means prior to opening the bottom valve and opening valve detection means for detecting that the bottom valve for unloading that is provided in the vicinity of the lubrication hose connection port of the tank truck has been opened. After the detection of the unloading preparation start detection means for detecting the start and the unloading preparation start detection means detects that the unloading preparation stage has been entered, the opening valve detection means detects that the bottom valve is opened. And a discharge processing detection means for detecting that the discharge processing of liquid fuel possibly remaining in the unloading pipe has been performed and outputting a residual liquid processing completion signal. There is.

  However, even with such a system, when the fuel oil is loaded in the hatch at the oil tank and the fuel oil is traveling toward the filling station, the seal portion of the bottom valve may be deteriorated or dust may be caught in the bottom valve. When the fuel oil leaks to the common pipe due to a fault or the like, although the fuel oil can be temporarily detected by the accumulation of the fuel oil in the common pipe, it is difficult to identify which of the plurality of bottom valves has an abnormality.

  Not only that, since the bottom valve is usually operated by air pressure, the air pressure is lowered due to the failure of the air control during unloading and the elastic force of the spring which pushes the valve body in the valve closing direction is overcome. If it is closed, it is determined that the unloading has been completed despite the presence of fuel oil in the hatch, and there is a risk that the unloading will be less than the order amount.

  Furthermore, when unloading is completed in a state where air control is abnormal or dust and the like is bitten between the bottom valve and the valve seat, the interval from the bottom valve to the manual valve provided at the end of the oil supply hose connection port of the common piping There is a problem that the fuel oil remains and if the type of fuel oil for the next unloading is different from the previous one, mixed oil is generated.

Japanese Patent Laid-Open No. 7-32932

Patent No. 5184317

  The present invention has been made in view of such problems, and a first object of the present invention is a tank trolley capable of reliably detecting the valve opening state and the valve closing state of a bottom valve of a tank trolley car. It is to provide a bottom valve for a car.

  A second object of the present invention is to provide a bottom valve for a tank truck that can detect a leak from a bottom valve to be unloaded and a residual liquid in a tank discharge passage.

  The invention according to claim 1 has a plurality of hatches, wherein the oil supply hose connection port of each hatch is connected to the discharge pipe through a bottom valve, and the bottom valve is a bottom valve of a tank trolley that is opened and closed by air drive. And a bottom valve opening / closing sensor that detects that each bottom valve is in an open state or a closed state.

  According to the invention of claim 3, a liquid detection sensor is provided downstream of the bottom valve.

  According to the invention of claim 1, it is possible to reliably detect the valve opening state and the valve closing state of the bottom valve of each hatch.

  According to the invention of claim 3, it is possible to detect the leak from the bottom valve of each hatch and the residual liquid of the tank discharge passage.

The figure which shows the 1st Example of the bottom valve of this invention in the valve opening state. The figure which shows the same top valve in a valve closing state. The figure which shows the 2nd Example of a bottom valve opening / closing sensor. The figure which shows the 3rd Example of a bottom valve opening / closing sensor. The figure which shows the 4th Example of a bottom valve opening / closing sensor in an open state. The figure which shows the same top valve in a valve closing state. The figure which shows 5th Example of a bottom valve opening / closing sensor The figure which shows 6th Example of a bottom valve opening / closing sensor The figure which shows one Example of a curved tube in the state which removed the bottom valve. The figure which shows the other Example of the arrangement | positioning form of a liquid sensor. The figure which shows the outline of a tank lorry car. The figure which shows an example of the management system at the time of using the bottom valve of this invention. The figure which shows one Example of the valve apparatus of this invention. The figure (A) and the figure which shows the structure of the butterfly valve of an upstream (not shown), respectively notching a part of valve housing, and showing them from a downstream and an upstream. The figure which shows the valve stem bearing and valve stem of a valve plate which were notched in the state which removed the valve plate from the valve stem in the structure of a butterfly valve. Figure (A) shows a sensor component, Figures (B) and (C) show the structure of the front and back of the sensor component, and Figure (D) shows a schematic view of the function. The figure which shows the opening degree of a valve, and the positional relationship of a sensor structural member. The figure which shows the opening degree of a valve, and the positional relationship of a sensor structural member. The figure which shows the opening degree of a valve, and the positional relationship of a sensor structural member. The figures (A) and (B) show the second embodiment of the present invention in the structure of a valve plate, respectively. Figures (A) and (B) show the sensor components attached to the first valve located upstream respectively The figure which shows the opening degree of a valve, and the positional relationship of a sensor structural member. The figure which shows the opening degree of a valve, and the positional relationship of a sensor structural member. The figure which shows the opening degree of a valve, and the positional relationship of a sensor structural member.

  FIG. 11 shows an embodiment of a tank trolley vehicle provided with a bottom valve according to the present invention, wherein the tank 2 is divided into a plurality of hatches 3 by the partition plate 1 and the hatch 3 is provided on the bottom wall 4 The common pipe 7 is connected via the valve 5 and the bent pipe 6. Each bottom valve 5 is connected to the operating rod 8. In addition, the code | symbol 9 shows a vehicle-mounted control apparatus.

  1 and 2 show the first embodiment of the bottom valve according to the present invention in the open and closed states, and the structure as can be seen also in Patent Document 1, that is, the bottom wall of the hatch 3 The valve seat 11 provided on the upper peripheral edge of the lubricating hose connection port 10 formed in 4, the cylinder member 12 having a lower opening, and the lower end portion of the cylinder member 12 are fixed to the valve seat 11 from the upper side. A hollow shaft 14 for supplying air for opening and closing operations and vertically penetrating the curved pipe 6 and sliding the valve 13 integrally with the cylinder member 12 vertically, and the inner periphery of the cylinder member 12 The piston 16 fixed in the vicinity of the upper end of the hollow shaft 14 and the valve body 13 are constantly lubricated in the oil supply hose connection port 10, that is, in the valve closing direction. Biasing member 17, in this embodiment a compression coil spring and Is equipped. The upper end of the hollow shaft 14 is in communication with the air chamber 15. In addition, the code | symbol 18 in a figure shows the ring-shaped packing provided in the lower surface of the valve body 13. As shown in FIG.

  In the figure, reference numerals 20 and 21 denote proximity detection members constituting bottom valve open / close sensors for detecting the valve closing state and the valve opening state respectively characterized by the present invention, and in this embodiment, the sensor 20 is located above the piston 16 Further, the detection target member 21 is disposed at a position where the sensor 20 is operated when the valve body 13 is lowered to the position where the valve is closed (the state shown in FIG. 2).

  It goes without saying that the arrangement of the sensor 20 and the detection member 21 is reversed, that is, even if the detection member is arranged on the piston 16 side and the sensor is arranged on the cylinder member 12 side, the sensor according to this embodiment The twenty signal transmission cables 22 can be pulled out through the hollow shaft 14 to easily realize an explosion-proof construction. The sensor 20 may be a magnet diode or a photo sensor, and the detection member 21 may be a magnetic body or a light reflecting member.

  When unloading is instructed from the control device 9 in the valve closed state (state shown in FIG. 2), air is supplied to the air chamber 15 of the cylinder member 12 from the pressure source (not shown) via the hollow shaft 14. Is raised against the biasing member 17, and the valve body 13 integral with the cylinder member 12 separates from the valve seat 11 (state shown in FIG. 1).

  In the open state, since the sensor 20 is separated from the detection target member 21, it can be detected that the valve is open. When unloading is completed and the air supply is stopped, the cylinder member 12 descends due to the elasticity of the biasing member 17 and comes into contact with the valve seat 11 to be in the valve closed state (state shown in FIG. 2). The to-be-detected member 21 opposes and a signal is output from the sensor 20, and it can know valve closing.

  In the above embodiment, the bottom valve open / close sensor detects only one position, but as shown in FIG. 3 as the second embodiment, a plurality of valve openings are detected at intervals in the vertical direction. By arranging the detection member 21a and the detection member 31b for detecting the valve closing, the valve body 13 is separated from the valve seat 11, the sensor 30 is opposed to the detection member 31a, and a signal is output from the sensor 30 to open the valve. You can do it. Further, when the valve body 13 is seated on the valve seat 11, the sensor 30 is opposed to the detection target member 31b, and a signal is output from the sensor 30, so that it is possible to know that the valve is closed.

Further, as shown in FIG. 4 as the third embodiment, the valve body 13 is disposed from the valve seat 11 by arranging the sensor 40a for detecting the valve closing and the sensor 40b for detecting the valve opening with an interval in the vertical direction. Away, the sensor 40b faces the detected member 41, and a signal is output from the sensor 40b to know that the valve is open. Further, when the valve body 13 is seated on the valve seat 11, the sensor 40a is opposed to the detected member 41, and a signal is output from the sensor 40a, so that it is possible to know that the valve is closed.
That is, when the valve body is displaced even by biting dust or the like, it is possible to detect that the sensor can not detect the detected body and does not normally open and close.

Further, although the bottom valve open / close sensor is provided in the air chamber in the above-described embodiment, the fourth embodiment is provided outside the bottom valve 5 in consideration of facilitating maintenance such as sensor replacement and retrofitting of the sensor. Will be described based on FIG. 5 and FIG.
As shown in FIG. 5, the hollow shaft 14 is inserted into the housing portion 28 in which the detection portion 51 is disposed at one end and the shaft 81 fixed to the upper end of the air chamber 15 at the other end. A detection member 51 is provided at the lower end of the seal 27 so as to protrude to the outside through the seal 27. A sensor 50 is disposed at a position where the valve body 13 is separated from the valve seat 11 and the detection member 41 faces.

  When unloading is instructed from the control device 9 in the valve closed state (state shown in FIG. 6), air is supplied from the pressure source to the air chamber 15 of the cylinder member 12 via the hollow shaft 14. Air is supplied to the air chamber 15, the cylinder member 12 rises against the biasing member 17, and the valve body 13 integral with the cylinder member 12 separates from the valve seat 11 (state shown in FIG. 5)

  In the open state, as shown in FIG. 5, the sensor 50 is separated from the detection target member 21, so that the open state can be detected. Further, when unloading is completed and the supply of air is stopped, the cylinder member 12 descends due to the elasticity of the biasing member 17 and comes into contact with the valve seat 11 to close the valve (state shown in FIG. 6). Is located in the storage portion 28, the detected member 51 is opposed, and a signal is output from the sensor 50, so that the valve closing can be known.

  Furthermore, a fifth embodiment will be described based on FIG. 7 as a modification of the second embodiment. A detection target member 61a for detecting valve opening and a detection target member 61b for detecting valve closing are arranged at intervals in the vertical direction, the valve body 13 is separated from the valve seat 11, and the sensor 60 faces the detection member 61a. Thus, the sensor 60 outputs a signal to know that the valve is open. Further, when the valve body 13 is seated on the valve seat 11, the sensor 60 is opposed to the detected member 61b and a signal is output from the sensor 60, so that it is possible to know that the valve is closed.

  Furthermore, a sixth embodiment will be described based on FIG. 8 as a modification of the third embodiment. As shown in FIG. 8, the sensor 70a for detecting valve closing and the sensor 70b for detecting valve opening are arranged at intervals in the vertical direction, so that the valve body 13 is separated from the valve seat 11 and the sensor 70b is subjected to A signal is output from the sensor 70b so as to face the detection member 71, and valve opening can be known. Further, when the valve body 13 is seated on the valve seat 11, the sensor 70a is opposed to the detection target member 71, and a signal is output from the sensor 70a, so that it is possible to know that the valve is closed.

FIG. 9 shows an embodiment of the curved tube 6. In this embodiment, a weir 23 is formed in the vicinity of the oil supply hose connection port 11 of the curved tube 6, and a notch 23a is provided in a part thereof. A liquid detection sensor 24 is disposed. The weir 23 is inclined so that the notch 23a is at the lowermost position.
Furthermore, a recess is formed on the bottom surface of the curved tube 6 to provide a weir 25, and the weir 25 is also provided with a liquid detection sensor 26 as shown in FIG. 5.

  According to this embodiment, even if the amount of leakage is small, even if the amount of leakage is small, it is collected by the weirs 23 and 24 and flows into the liquid detection sensors 24 and 26 if the closing of the bottom valve is incomplete and there is a liquid leakage. It can be detected reliably.

  Not only that, the liquid flowing down the oil supply hose connection port 11 changes the appearance of the vortex U (see FIG. 1) depending on the flow velocity, so the outputs of the liquid detection sensors 24, 26 change. Therefore, it becomes possible to monitor the discharge situation during unloading.

  Furthermore, a recess is formed on the bottom surface of the curved tube 6 to provide a weir 25. As shown in FIG. 10, the weir 25 is also provided with the liquid detection sensor 26 to detect residual liquid in the flow path. it can.

If the bottom valve of the present invention is adopted, as shown in FIG. 12, information can be shared by sending signals of the tank lorry open / close sensor and liquid detection sensor to the server using the communication line, and the tank lorry from the oil tank Maintenance and communication can be performed automatically and automatically if any failure occurs in the bottom valve while moving to the filling station.
For example, in the tank lorry on the fuel oil supply side, the maintenance company that has been contacted by the server arranges necessary parts and the like, and prepares for maintenance personnel who have been contacted via the server to be able to work quickly. be able to.

In addition, it is possible to avoid confusion such as the fuel oil can not reach by receiving communication from the server in the fuel oil receiving side of the fuel oil receiving side and the fuel supply company.

 In the above embodiment, the liquid detection sensor is provided in the vicinity of the bottom valve, but as shown in FIG. 13, the visual pipe unit 91 is interposed in the vicinity of the oil supply hose connection port 90 of the common piping 7 The two upstream and downstream valves constituting this, which are the butterfly valves 92 and 93 in this embodiment, are connected, and the same effect can be obtained by incorporating the sensor member 94 into the upstream valve 92.

  That is, one liquid chamber 95 is partitioned by butterfly valves 92 and 93, and a light transmitting member constituting a window, so-called sight glass 96, is provided in the liquid chamber 95 so that the fluid inside can be confirmed from the outside. A visual tube unit 91 is configured by the butterfly valves 92 and 93, the liquid chamber 95, and the sight glass 96.

  A sensor member 94 for detecting the opening / closing of the valve and the presence / absence of the liquid in the liquid chamber 95 is disposed on the upstream butterfly valve 92, and a signal line S outputs a signal indicating the presence / absence of the liquid and the opening / closing of the valve.

  FIG. 14 shows details of the butterfly valve 92 on the upstream side, with the valve housing cut away in a half, and is disposed on the valve plate 98 rotatably incorporated in the valve housing 97. The operating rod 100 and the valve rod bearing 101 connected to the lever 99 are disposed in the upper and lower position on the rotational shaft C-C, and are inserted rotatably into the valve rod shaft 102 of the valve housing 97 .

  In the valve rod bearing 101, the windows 103 and 104 are formed at mutually opposing positions as shown in FIG. 15, and the valve rod shaft 102 is in a position overlapping with the windows 103 and 104 and mutually opposing each other. As described above, the windows 105 and 106 are formed, and the sensor member 94 for detecting the presence of the liquid and the angular position (opening and closing) of the valve plate 98 is incorporated therein.

  As shown in FIGS. 16A to 16D, the sensor component 94 includes two prism components 107 and 107 'extending in the vertical direction so as to face the windows 103 and 104 facing each other. Light emitting elements 108a and 108a that face the slopes a and b formed by the respective prism components 107 and 107 'and slopes a' and b '(FIG. 16D) and irradiate light rays to the slopes a and a' Light-receiving elements 108b and 108b 'receiving light reflected from the other opposite slopes b and b' and light sensors 109 and 109 'for detecting changes in light incident from the sight glass 96 are disposed on the substrate 110. ing.

  In the substrate 110, one of the two sets of sensor components 94 disposed on both sides of the substrate 110, ie, the light emitting element 108a, the light receiving element 108b, and the light receiving element 109, is always constant, ie, regardless of the opening degree of the valve plate 98. The common piping side and the other set of sensor components, that is, the light emitting element 108 a ′, the light receiving element 108 b ′, and the light receiving element 109 ′ face the site glass 96 side.

  In the sensor component 94 configured as described above, when there is a liquid on one side, when light is present, the light beam of the light emitting element 108a passes through the slope a and is emitted as the outgoing light A to the outside. It does not enter the element 108b, and becomes a liquid presence signal. On the other hand, when no liquid is present, the light is totally reflected on the surface a, and the return light B from the other surface b is incident on the light receiving element 108b to become a no-liquid signal.

  In this embodiment, the first set of sensor components (light emitting element 108a, light receiving element 108b, light receiving element 109) is connected to the common pipe 7 side, and the other set of sensor components (light emitting element 108a ', light receiving element The case where the light receiving element 109 ') is disposed so as to face the liquid chamber 95 (sight glass 96) will be described as an example.

  In order to unload one hatch, the Lori oil supply hose connection port 90 and the oil supply port of the underground tank are connected by an oil supply hose, and the upstream first valve 92 is closed by the light receiving element 109, 109 This is confirmed by the 'signal, and also the closing of the downstream second valve 93 is confirmed. That is, when the first valve 92 is in the closed state (FIG. 17a), no incident light is on the upstream side (the side of the common pipe 7) of the first valve 92, but the light from the sight glass 96 on the downstream side As shown in Table 1, there is no incident light on the light receiving element 108b, and the light of the sight glass 96 is incident on the light receiving element 108b ', so that the valve 92 can be confirmed to be closed.

Table 1

  Next, when the bottom valve 5 of the hatch containing the predetermined oil type and oil amount is opened, the fuel oil flows into the common pipe 7 and is stopped at the first valve 92. In this state, as described above, there is no incident light on the light receiving element 109 on the common pipe 7 side, and the light of the sight glass 96 is incident on the light receiving element 109 'on the liquid chamber 95 side, while the light of the light emitting element 108a is a prism The surface a formed by the component 107 is not transmitted to be incident on the light receiving element 108 b, and no liquid exists on the liquid chamber 95 side, so the light from the light emitting element 108 a ′ is a surface a by the prism component 107 The light is totally reflected by 'and b' and enters the light receiving element 108b '. Thus, it can be determined that the liquid has flowed into the common pipe 7 side.

  Then, when the first valve 92 is opened to be half open (FIG. 17b), the windows 103 and 104 of the valve rod bearing 101 are closed by the valve rod shaft 101 so that light does not enter the light receiving elements 109 and 109 '. When the valve plate 98 is further rotated to fully open the first valve 92, the windows 103 and 104 again overlap the windows 18 and 19 (FIG. 5c), and the liquid also flows into the liquid chamber 95, and the liquid flows to the second valve 93. Stop at At this time, the color of the liquid from the sight glass 7 to the liquid chamber 6 is checked to confirm the oil type. In the fully open state, light from the sight glass 96 is incident on the light receiving elements 109 and 109 '. As described above, when the match of the oil types can be confirmed, the second valve 93 is opened to perform unloading.

  When unloading is completed, the first and second valves 92 and 93 are closed. When the valve 92 is closed, the windows 16 and 17 of the valve rod bearing 101 and the windows 105 and 106 of the valve rod shaft 102 overlap but light does not enter the light receiving element 109 on the common pipe 7 side. Since light from the sight glass 96 is incident on the element 109 ′, it is determined that the first valve 92 is completely closed.

  On the other hand, when the unloading is incomplete and the liquid remains in the liquid chamber 95, the light from the light emitting element 108a does not enter the light receiving element 108b 'on the liquid chamber 95 side.

  That is, in this embodiment, in the fully closed state, the common piping side is "dark" and the sight glass side is "light", and in the half open state, the common piping side is "dark to light", the sight glass side is "light", and further fully opened. Then, since the common piping side is "bright" and the sight glass side is also "bright" similar to the common piping, three states can be reliably detected.

  As described above, since the presence or absence of residual liquid after unloading can be automatically confirmed by the sensor component 94, it is possible to prevent scattering of fuel oil when the oil supply hose is removed. Not only that, but the same sensor can also detect the closing of the valve.

  Although the sensor component 94 is built in the valve rod shaft 102 in the embodiment shown in FIG. 15, the operating rod 100 of the valve plate 98 and windows on both surfaces of the valve plate 98 as shown in FIG. If the sensor component 94 is formed by forming 111, 111 'and the sensor component 8 similar to that of the embodiment shown in FIG. 15 as shown in FIG. Play.

That is, when the first valve 92 is closed (FIG. 20a), no light is incident on the common pipe 7 side, and the light is incident on the sight glass 96 side, so that it can be determined to be totally closed.
In the embodiment of FIGS. 20a to 20c, the light receiving elements 109 and 109 'in the embodiment shown in FIGS. 17a to 17c are omitted.
In the current state, as in the case of the embodiment shown in FIG. 15, no liquid is present in the common pipe 7 and the liquid chamber 95, and the light from the light emitting elements 108a and 108a 'is the slopes a and a of the prism component members. Since the light passes through (see FIG. 16D), the light does not enter the light receiving elements 108b and 108b '.

Table 2

  Next, when the bottom valve 1 of the hatch containing the predetermined oil type and oil amount is opened, the fuel oil flows into the common pipe 7 and is stopped at the first valve 92. In this state, as described above, there is no incident light on the light receiving element 109 on the common pipe 7 side, and the light of the sight glass 96 is incident on the light receiving element 109 'on the liquid chamber 95 side, while the light of the light emitting element 108a is a prism The light from the light emitting element 108 a ′ does not enter the light receiving element 108 b through the slope a by the component 107, and no liquid is present on the liquid chamber 95 side. , And are incident on the light receiving element 108b '. Thus, it can be determined that the liquid has flowed into the common pipe 7 side.

  Next, when the first valve 92 is opened to become half open (FIG. 20b), light from the windows 111 and 111 'of the sensor component 94 is incident on the light receiving elements 109 and 109'. Further, when the first valve 92 is fully opened (FIG. 8 c), the liquid flows into the liquid chamber 95 and stops at the second valve 93. At this time, the color of the liquid in the liquid chamber 95 is checked from the sight glass 96 to confirm the oil type. Since the windows 111 and 111 'are directed to the side of the sight glass 96 in the fully open state, light from the sight glass 96 is incident on the light receiving elements 109 and 109'. As described above, when the match of the oil types can be confirmed, the second valve 93 is opened to perform unloading.

When unloading is completed, the first and second valves 92 and 93 are closed. When the hatch liquid is completely discharged, no liquid exists in the liquid chamber 95, and thus the light from the light emitting element 108a is incident on the light receiving element 108b on the common pipe side of the sensor component 94. The absence of the solution can be confirmed.
On the other hand, when the unloading is incomplete and the liquid remains in the liquid chamber 95, the light of the light emitting element 108a on the liquid chamber 95 side passes through the slope a and is not incident on the light receiving element 108b. It can be determined that there is.

As described above, since the presence or absence of residual liquid after unloading can be automatically confirmed by the sensor component, scattering of fuel oil can be prevented when the oil supply hose is removed. Not only that, the same sensor can also detect the opening and closing of the valve.
That is, in this embodiment, as shown in Table 2, the common piping side is "dark" and the sight glass side is "bright" in the fully closed state, and in the half open state, the common piping side is "change from dark to light" and the sight glass side is "light" Further, since the common piping side is "bright" and the sight glass side is "bright" in the fully open state, the three open / close states of the valve can be reliably detected.

  According to this embodiment, it is possible to relatively easily realize a structure in which the display means and the notification means 112 are incorporated in a part of the lever 99 and the detection information of the sensor component 94 is displayed.

  According to the present invention, the valve opening / closing sensor and the liquid detection sensor can be configured by incorporating the light emitting / receiving element into the rotary shaft constituting member of the valve plate, so that unloading work can be managed by the sensor without requiring repair of the flow path pipe. .

Reference Signs List 1 partition plate 2 tank 3 hatch 4 bottom wall 5 bottom valve 6 bent pipe 7 common piping 8 control rod 9 in-vehicle control device 10 oil hose connection port 11 valve seat 12 cylinder member 13 valve body 14 hollow shaft 15 air chamber 16 piston 17 Biasing member 18 Packing 20, 30, 40a, 40b, 50, 60, 70a, 70b Sensors 21, 31a, 31b, 41, 51, 61a, 61b, 70 Detecting members 23, 25 樋 24, 26 Liquid detection sensor 27 Seal 28 storage section 81 axis U vortex 91 visual tube unit 92, 93 valve 94 sensor member 95 liquid chamber 96 sight glass

Claims (7)

It has a plurality of hatches, and an oil supply hose connection port of each hatch is connected to a discharge pipe through a bottom valve, and the bottom valve is a bottom valve of a tank trolley car that is opened and closed by air drive,
A bottom valve of a tank truck having a bottom valve opening / closing sensor which detects that each of the bottom valves is in an open state or a closed state.   The bottom of a tank trolley car according to claim 1, wherein the bottom valve opening / closing sensor is constituted by a detecting portion at the upper portion of the valve body of the bottom valve, and a detected portion at the housing main body where the upper portion of the valve body is located with the detecting portion. valve. The bottom valve of a tank lorry according to claim 1, wherein a liquid detection sensor is provided downstream of the bottom valve. The bottom valve of a tank lorry according to claim 1, wherein a liquid detection sensor is provided in the vicinity downstream of the bottom valve. The bottom valve of a tank trolley vehicle according to claim 3, wherein a weir is formed downstream of the bottom valve, and a liquid detection sensor is provided near the bottom of the weir.   The bottom valve of a tank trolley vehicle according to claim 1, wherein a downstream valve is connected to a common pipe connected to the bottom valve, and a component of the valve is provided with liquid detection means. The bottom valve of a tank trolley car according to claim 6, wherein said downstream valve is constituted by a butterfly valve, and a liquid detection means is incorporated in a shaft member of said butterfly valve.

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