JPH1111582A - Loading weigh detector of tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loading weight detector for a tank lorry which first does not require an explosion-proof function, secondly is simplified and made easy in the structure, excellent in terms of the cost, and thirdly detects loading weights accurately. SOLUTION: This detector 5 can detect a loading weight of liquid loaded in a chamber 4 of a tank lorry. The detector is provided with a float 6 moving up and down in accordance with the liquid level in the tank chamber 4, a rotary body 8 rotating both forward and backward to correspond to the vertical movement of the float 6, holes made on the periphery of the rotary body 8, light- projection parts 11, 12 provided to be arranged on the holes, light-receiving parts 13, 14 arranged opposite to the light-projection part 11 through the rotary body 8, in which the beam radiated from the projection part 11 is transmitted or blocked in accordance with the presence of the holes oppositely arranged and received as optical pulses, and a controller and an indicator photoelectrically transfering the optical pulses from the light-receiving parts 13, 14 through the second optical fiber and counting the pulses and computing the loading weight of the tank chamber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a loaded amount of a tank lorry. That is, the present invention relates to an apparatus for detecting the amount of liquid loaded on a tank of a tank truck.

[0002]

2. Description of the Related Art In a tank lorry, a flammable liquid as a dangerous substance is loaded in each tank chamber in a tank, and is transported and unloaded. The amount of liquid loaded in the tank chamber of the tank truck is conventionally detected by inserting a measuring rod from above the tank chamber and measuring the liquid level. Since the manual method using a shaku bar is very troublesome, recently, a capacitance type, a magnetostrictive type,
Ultrasonic type or the like payload detection devices are being widely used.

[0003]

The following problems have been pointed out in such a conventional example. That is, as described above, the capacitance type, which is being used frequently recently,
Each of the load detecting devices of the magnetostrictive type, the ultrasonic type and the like has an overall structure of an electric type, uses an electric signal for signal transmission, and operates by energization and application in the tank or on the tank. On the other hand, gasoline, kerosene, light oil, and the like loaded in the tank chamber of the tank truck to be detected are made of extremely flammable liquids, which are dangerous substances. Therefore, the above-mentioned conventional load detecting devices have a high explosion-proof property and a strict explosion-proof specification that can completely prevent the danger of electric spark and spark ignition in the configuration near the tank inside or on the tank. Was adopted. Therefore, in the conventional loading amount detection device, a problem in terms of cost has been pointed out, such as the configuration around the tank becomes extremely complicated due to such consideration of safety, resulting in a significant increase in cost. Further, it has been pointed out that the above-described conventional load amount detection device has many malfunctions due to such a complicated configuration.

The present invention has been made in view of the above circumstances and has been made in order to solve the above-mentioned problems of the conventional example. A lot of holes are provided in a rotating body driven by a float and connected to an optical fiber. The control unit counts the light pulses obtained by combining the light emitting unit and the light receiving unit, and displays the load on the display unit. Secondly, it is an object of the present invention to propose a tank lorry load amount detection device which can simplify and simplify the configuration and thirdly realize accurate detection.

[0005]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
The tank-loading-amount detecting device detects the loading amount of a flammable liquid, which is a dangerous substance, loaded in a tank of a tank lorry. And the next float, rotating body,
It has a hole, a first optical fiber, a light projecting unit, a light receiving unit, a second optical fiber, a control unit, a display unit, and the like. That is, a float disposed in the tank and moving up and down with the liquid surface of the liquid, a rotating body that rotates in the forward and reverse directions corresponding to the up and down movement of the float through an interposing mechanism, and a fixed pitch to the rotating body. A number of holes provided in the periphery, a light projecting portion that is provided to face the rotating body so as to be able to face the hole, and light is guided by the first optical fiber, and is provided to face the light projecting portion through the rotating body. A light receiving unit that transmits and blocks light emitted from the light projecting unit in accordance with the presence or absence of the opposing hole, thereby receiving a light pulse as the light pulse, and guiding the light pulse from the light receiving unit to the control unit A second optical fiber, a control unit that photoelectrically converts and counts a light pulse from the second optical fiber, and calculates a load amount of the liquid in the tank; and a load amount of the tank calculated by the control unit. And a display unit for displaying

Next, claim 2 is as follows. That is, in the tank-loading-amount detecting device according to the second aspect, in the tank-loading-amount detecting device according to the first aspect, each hole of the rotating body is provided around the inside and outside of the hole. The same number is provided inside and outside while corresponding positions are located inside and outside, and the corresponding positions are slightly shifted in the circumferential direction. Then, a slight positional shift between the holes located at the corresponding positions inside and outside in this way, a slight time shift of transmission and blocking of light between the holes based on the slight positional shift, and a difference between the corresponding two-phase light pulses. Based on the slight phase difference, the control unit determines whether the rotation of the rotating body is normal or reverse, the vertical movement of the float, and the increase or decrease of the load of the tank.

[0007] Claim 3 is as follows. That is, the loading amount detection device for a tank lorry according to claim 3 is
2. The apparatus according to claim 1, wherein the float is disposed in the tank, and the rotating body,
The light emitting part, the light receiving part, etc. are arranged on the tank, and the control part,
The display unit and the like are arranged inside the tank, in the cab other than on the tank, and the like.

[0010] The apparatus for detecting the load of a tank lorry according to the present invention is configured as described above. According to the third aspect of the present invention, the float is provided in the tank, the rotating body, its holes, the light emitting portion, the light receiving portion, etc. are provided in the tank, and the control portion, the display portion, etc. are provided in the cab. Placed inside and on tanks. When the liquid level of the liquid loaded in the tank moves up and down, the float moves up and down, and the rotating body rotates in the normal and reverse directions. A number of holes are provided around the rotator, and a light emitting unit and a light receiving unit are provided on both sides of the rotator. When the rotator rotates in the normal or reverse direction, light emitted from the light emitting unit via the first optical fiber is emitted. Is transmitted or blocked according to the presence or absence of the opposing hole, and is thus received by the light receiving unit as a light pulse. Then, the light pulse is guided to the control unit via the second optical fiber, photoelectrically converted and counted, whereby the loaded amount of the liquid in the tank is calculated and displayed on the display unit.

According to the second aspect of the present invention, each hole of the rotating body is provided inside and outside.
The holes on the inner phase side and the holes on the outer phase side are slightly shifted in the circumferential direction while being respectively located at corresponding positions. Therefore, with the vertical movement of the float and the forward / reverse rotation of the rotating body, there is a slight time lag between the transmission and blocking of light by the holes on the inner phase side and the transmission and blocking of light by the holes on the outer phase side. As a result, there is a phase difference between the light pulse by the light receiving unit on the inner phase side and the light pulse by the light receiving unit on the outer phase side.
Therefore, the control unit compares the phase difference between the two light pulses, that is, the lead and lag, to determine whether the rotation of the rotating body is normal rotation or reverse rotation,
Then, it is determined whether the float has risen or dropped, or whether the load of the tank has increased or decreased. The load is calculated by addition or subtraction, and is displayed on the display unit.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1, FIG. 2,
3, 4, 5, 6, etc. are provided for explaining the embodiment of the present invention. FIG. 1 is an explanatory front view of a main part,
FIG. 2 (1) is a side view of a main part, FIG. 2 (2) is a perspective view of a float or the like, FIG. 3 (1) is a side view of a float or the like, and FIG. FIG. 2B is an explanatory plan view of the upper pulley, and FIG. 3C is an explanatory bottom view of the lower pulley. 4 shows a rotating body, a light projecting unit, a light receiving unit, etc., FIG. 4 (1) is a front view, FIG. 4 (2) is a plan view, and FIG. 5 (1) is a plan view. FIG. 5B is a side view of the rotating body, and FIG. 5B is a block diagram of a control unit, a display unit, and the like.
FIG. 3 is an explanatory front view of an example of a display unit. FIG. 7 is an explanatory side view of the tank truck.

First, the tank truck 1 will be described with reference to FIG. The inside of the tank 2 of the tank lorry 1 is divided into about 2 to 7 chambers (6 in the illustrated example) by a partition plate 3 along the width direction.
) Is divided into a plurality of tank chambers 4. And
Flammable liquids, such as gasoline, kerosene, light oil, and other oils, which are dangerous substances, are loaded from storage tanks such as oil tanks into the respective tank chambers 4 through inlets provided in manholes on the tanks 2. However, different types of liquid are often loaded in each tank chamber 4. Take tank lorry 1
Transports the liquid by loading it in each tank chamber 4 of the tank 2 and unloading it to a destination receiving tank such as an underground tank of a gas station, for example. The unloading from the tank 2 is performed at the bottom valve of each tank chamber 4, a discharge pipe having one end branched and connected to each bottom valve, a discharge port with a discharge valve at the other end of the discharge pipe, and a discharge port. The operation is performed via a connected discharge hose (not shown), a filler port of a receiving tank such as a gas station, or the like. A in the figure is a cab of the tank truck 1. In addition, as the tank lorry 1, besides an integral single type as shown in the figure, there is a trailer type in which a trailer equipped with the tank 2 is pulled by a tractor with a cab A. Tank lorry 1
Is generally like this.

Hereinafter, the load detection device 5 will be described.
The loading amount detection device 5 detects the loading amount of a flammable liquid as a dangerous substance loaded in the tank 2 of the tank truck 1. In the illustrated example, the loading amount of the same liquid loaded in each tank chamber 4 of the tank 2 is detected. Then, the next float 6, the intervening mechanism 7, the rotating body 8,
It has holes 9, 10, light projecting units 11, 12, light receiving units 13, 14, second optical fiber 15, control unit 16, display unit 17, and the like.

That is, the loading amount detecting device 5 includes the tank 2
A float 6 which is arranged inside and moves up and down with the liquid level of the liquid;
A rotating body 8 that rotates in the forward and reverse directions in accordance with the vertical movement of the float 6 via an interposing mechanism 7, a large number of holes 9, 10 provided around the rotating body 8 at a constant pitch, and faces the holes 9, 10. Light emitting units 11 and 12 which are provided as opposed to the rotator 8 as possible so that light is guided by the first optical fiber 18, and the light emitting units 11 and 1 via the rotator 8
2, the light emitted from the light projecting units 11 and 12 is transmitted and blocked according to the presence or absence of the opposed holes 9 and 10.
Light receiving units 13 and 14 which receive light pulses as light pulses;
The second optical fiber 15 for guiding the light pulses from the light receiving units 13 and 14 to the control unit 16, and the control for photoelectrically converting and counting the light pulses from the second optical fiber 15 and calculating the amount of liquid loaded in the tank 2. A display unit 17 for displaying the loading amount of the tank 2 calculated by the control unit 16;
Having. Hereinafter, these will be described in more detail.

The loading amount detector 5 shown in the drawing detects the loading amount of the liquid loaded in each tank chamber 4 of the tank 2. Therefore, the float 6 is disposed in each tank chamber 4 of the tank 2 as shown in FIG. 7, and the rotating body 8, the light projecting units 11 and 12, the light receiving units 13 and 14, etc. The intervening mechanisms 7 are arranged on the tank chambers 4, respectively, and are interposed between the float 6 and the rotating body 8 of each of the tank chambers 4. It is arranged in. The control unit 16, the display unit 17, and the like are arranged inside the tank 2 and other than above the tank 2, for example, inside the cab A, below the tank 2 side, and the like. That is, the control unit 16 collectively calculates the load amount of each tank chamber 4 at one place, and the display unit 17 also collectively displays the load amount of each tank chamber 4 at one place. The first optical fiber 18 and the second optical fiber 15 are provided between one control unit 16 in the cab A, for example, and the light projecting units 11 and 12 and the light receiving units 13 and 14 on each tank chamber 4. However, each is interposed. In the tank lorry 1, in consideration of the fact that a flammable liquid such as gasoline, kerosene, light oil, or other oil is loaded in each tank chamber 4 of the tank 2, flammable liquid such as gasoline, kerosene, light oil, or other oil is placed on the tank 2 as well as in the tank 2. (Each tank chamber 4 is, of course,
The upper part) requires high explosion-proof properties. In contrast,
Such an explosion-proof property is not required for the inside of the cab A or the like.

First, the float 6 and the like of the load detecting device 5 will be described. As shown in FIG. 7, the float 6 in the illustrated example is disposed in each of the tank chambers 4 of the tank 2 and moves up and down together when the liquid level of the liquid loaded in the tank chamber 4 moves up and down. That is, as shown in FIG. 1, FIG. 2, FIG. 7, etc., from the bottom inside the tank chamber 4 to the upper side of the tank chamber 4, the aluminum storage pipes 19 are vertically provided, respectively.
The storage pipe 19 has a diameter of, for example, 3
It is about 0 mm, the lower surface is opened, and holes are appropriately formed in various parts of the side surface (not shown) so that the loaded liquid can freely flow between the inside of the tank chamber 4. It has become. Thus, the liquid level of the liquid in the tank chamber 4 and the liquid level of the liquid in the storage pipe 19 coincide. And such a storage pipe 1
The float 6 is accommodated in the
Has a hollow sealed structure having a diameter of, for example, about 25 mm and a diameter slightly smaller than that of the storage pipe 19, floats on the liquid surface of the liquid while being guided vertically by the storage pipe 19, and moves up and down with the vertical movement of the liquid surface. It works. The float 6 and the like have this configuration.

Next, the interposing mechanism 7 of the load amount detecting device 5
Is described. As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, an upper pulley 20 and a lower pulley 21 are disposed at the bottom inside the tank chamber 4 and the upper projecting part of the tank chamber 4 of the storage pipe 19, respectively. . The upper pulley 20 and the lower pulley 21, which are vertically arranged, have their centers fixed to horizontal shafts 22 and 23 inserted therethrough, respectively.
With the shafts 22 and 23 held at 9, it is rotatable in the normal and reverse directions. A string 24 is stretched between such an upper pulley 20 and a lower pulley 21. In the float 6 having the above-mentioned hollow sealed structure, two thin pipes 25 and 26 having upper and lower surfaces opened and having a diameter of about 6 mm are vertically penetrated and fixed. Is equipped with a tension spring 27 in a vertical direction.
Has a lower end fixed to a lower part of the thin pipe 25 and an upper end fixed to one end 28 of the cord 24.

The string 24 is made of, for example, aramid fiber, the other end 29 is fixed to the lower part of the thin pipe 25, and
While being stretched between the upper pulley 20 and the lower pulley 21,
The other narrow pipe 26 is vertically penetrated. In this manner, the cord 24 has one end 28 fixed to the spring 27 in one of the thin pipes 25 and tensioned, and the other end 29 fixed to the lower portion of the thin pipe 25,
The middle is the upper pulley 20, the lower pulley 21, and the other thin pipe 2
6 mag. The intervention mechanism 7 is configured as described above.

Next, the rotating body 8 of the loading amount detecting device 5 will be described. As shown in FIGS. 1, 4, and 5 (1), the rotating body 8 has a disk shape with a diameter of, for example, about 47 mm, and has a horizontal shaft on the upper side of the above-described interposition mechanism 7. 22
The center is fixed and arranged vertically, so that the float 6 rotates forward and backward on the tank chamber 4 in accordance with the vertical movement of the float 6 in the tank chamber 4. That is, the string 24 of the interposition mechanism 7 is fixed to the float 6 at one end 28 or the other end 29 thereof via the spring 27 or the thin pipe 25 as described above. Then, when the float 6 moves up and down together with the liquid level, the string 24 is caused to run up and down, and the string 24 stretched with tension is tightly wound around the upper pulley 20 and the lower part of the interposition mechanism 7. The pulley 21 rotates forward and backward following the string 24. Therefore, the rotating body 8 fixed to the shaft 22 common to the upper pulley 20 of the interposition mechanism 7 is also set to rotate forward and reverse following the rotation. The rotating body 8 is configured as described above.

Next, the holes 9 and 10 provided in the rotating body 8 will be described. In such a vertical rotating body 8 of the load detecting device 5, a large number of holes 9 and 10 are provided at a constant pitch in a horizontal direction. That is, as shown in FIG. 5 (1), the holes 9 and 10 of the rotating body 8 are provided around the inner and outer layers in a double manner, and the inner and outer holes 9 and 10 are spaced at regular intervals in the radial direction. The same number is provided inside and outside, while corresponding positions are present inside and outside, and the corresponding positions are slightly shifted in the circumferential direction.

The holes 9 and 10 will be described in more detail. For example, 40 holes 9 having a diameter of 1.2 mm are bored and provided on the inner phase side on the outer peripheral portion of the rotating body 8 having a disk shape having a diameter of about 47 mm, and also on the outer phase side. Similarly, forty holes 10 are formed with a diameter of 1.2 mm and are provided around the holes. And
The holes 9 on the inner phase side and the holes 10 on the outer phase side are formed of the same number as described above, and they are respectively located inside and outside.
They are shifted by mm. That is, the center line drawn from the center of the disc-shaped rotating body 8 to the hole 9 on the inner phase side and the center line drawn from the center of the outer phase side to the hole 9 or the vicinity of the hole 10 are zero in the circumferential direction. .6mm each. In the illustrated example, the holes 9 on the inner phase are offset in a counterclockwise direction (the holes 10 on the outer phase are shifted in a clockwise direction). The holes 9, 10 are like this.

Next, the light emitting units 11 and 1 of the loading amount detection device 5
2 will be described. As shown in FIG. 1, FIG. 4, FIG. 5 (2) and the like, particularly as shown in FIG. 4 (2), it is possible to oppose each hole 9 on the inner phase side of the rotating body 8 described above. And the light emitting unit 1
The light projecting portion 12 is provided so as to face each hole 10 on the outer phase side. And (2) of FIG.
As shown in the figure, when the projectors 30 and 31 are driven based on a control signal from the control unit 16, (of course, the projectors 30 and 31 are not in the tank 2 or on the tank 2 but in the cab A, for example). ), The light is emitted from the projector 30,
31 to each cable-like first optical fiber 18
The light is guided to the light projecting units 11 and 12 via the. The light emitting units 11 and 12 are configured as described above.

Next, the light receiving portions 13, 1 of the load amount detecting device 5
4 is as follows. As shown in FIG. 1, FIG. 4, FIG. 5 (2) and the like, particularly as shown in FIG. 4 (2), the light receiving portion 13 is provided with each hole 9 on the inner phase side of the rotating body 8. The light receiving unit 14 is positioned to be able to face the holes 10 on the outer phase side of the rotator 8 and the light emitting unit. 12 is provided facing the rotating body 8.

The light receiving section 13 can receive the light emitted from the light projecting section 11, and the light receiving section 14
The light emitted from the light source can be received. That is,
The light emitted from the light projecting unit 11 is transmitted through the hole 9 and received by the light receiving unit 13 when any of the holes 9 on the inner phase side of the rotating body 8 faces each other. When the hole 9 is not located at the opposing position, the light is blocked by the rotating body 8 and is not received by the light receiving unit 13. Similarly, when any of the holes 10 on the outer phase is opposed to each other, the light emitted from the light projecting unit 12 passes through the hole 10 and is received by the light receiving unit 14. If not, the light is blocked by the rotating body 8 and is not received by the light receiving unit 14. As described above, the light emitted from the light projecting units 11 and 12 is transmitted and blocked in accordance with the presence or absence of the opposing holes 9 and 10, and the chopper is repeated with the rotation of the rotating body 8 to receive light. Part 1
Lights 3 and 14 are received as intermittent signals of light as light pulses. In other words, the light receiving units 13 and 14 start generating light pulses by starting the forward / reverse rotation of the rotator 8, and thereafter generate an optical pulse proportional to the forward / reverse rotation amount of the rotator 8, and forward / reverse the rotator 8. The stop of the rotation stops the generation of the light pulse. The light receiving units 13 and 14 are configured as described above.

Next, the second optical fiber 15, the control unit 16 and the like of the load detecting device 5 will be described. First, the second optical fiber 15 has a cable shape and is disposed between the light receiving units 13 and 14 and the control unit 16 as shown in FIG. 1 and FIG. 13,14
The light pulse, which is a light signal, is transmitted to the control unit 16 in the cab A.
Send to. As shown in FIG. 5 (2), the control unit 16 controls the light pulse as an intermittent signal of the light transmitted from the light receiving units 13 and 14 for each tank chamber 4 via the second optical fiber 15, respectively. Is subjected to photoelectric conversion by a phototransistor or the like, converted into an electric pulse signal, subjected to signal processing, and the number of intermittents is counted. Then, by adding or subtracting this count value to or from the reference value, the amount of liquid loaded in each tank chamber 4 is calculated.

Incidentally, such addition or subtraction is determined as follows. That is, as described above, in the rotating body 8, the holes 9 on the inner phase and the holes 10 on the outer phase, which correspond to the inside and outside, are slightly displaced from each other. A slight time shift occurs in the transmission and cutoff of light, and thus a phase difference also occurs between the corresponding two-phase light pulses received by the light receiving units 13 and 14.
Thus, by comparing the two light pulses in the control unit 16, it is possible to determine whether the rotation of the rotator 8 is normal or reverse, the vertical movement of the float 6, and the increase or decrease of the load capacity of the tank chamber 4. For example, at the time of loading on each tank 4 in an oil depot, by comparing the phase difference between the two light pulses and observing the lead and lag between the two, the rotating body 8 rotates forward and the float 6 rises and the tank chamber 4 It is determined that the load has increased, and the addition is performed. On the other hand, at the time of unloading at a gas station or the like, the phase difference between the two light pulses is compared, and the lead / lag between the two is observed (reverse to the above), whereby the rotating body 8 is reversed and the float 6 is lowered. Then, it is determined that the load amount of the tank chamber 4 has decreased, and the subtraction is performed. As such a control unit 16, a microcomputer, other various gate circuits, and the like are used. The control unit 16 is configured as described above.

Next, the display unit 17 of the load detecting device 5
Is described. The display unit 17 shown in FIG. 5 (2), FIG. 6 and the like displays the amount of liquid loaded in each tank chamber 4 calculated by the control unit 16 as described above. In the illustrated example, an LED is used as such a display unit 17, and the loading amount of each tank chamber 4 is lit and displayed by a lamp. In addition, the numerical display in FIG. 6 shows the chamber number of each tank chamber 4, and "2K, 4K, etc." indicates that the loading capacity of each tank chamber 4 is 2KL or 4KL.
Further, in the illustrated example, the loading amount for each tank chamber 4 is displayed in the% display.
When only 2 KL is loaded in the KL tank chamber 4, it is possible to change the display to set 2 KL to 100% by using the load amount change button. “Reset” is the reset button. By the way, the display unit 17 may be of a known display type using various scales and numbers instead of the LED type shown in the illustrated example. The display unit 17 is configured as described above.

In FIGS. 1, 2 and 4, reference numeral 32 denotes an upper cover, that is, a cap of the storage pipe 19. Reference numeral 33 denotes a case-shaped box. In the box 33, the upper part of the storage pipe 19, the upper pulley 20, the shaft 22, the rotating body 8, the light emitting units 11, 12, and the light receiving units 13, 14 are provided. And the like, and the box 33 is provided with each tank chamber 4 of the tank 2.
Each is placed above. 1 and FIG.
Denotes mounting portions for the light projecting portions 11 and 12, the light receiving portions 13 and 14, and the like. In FIG. 1, 35 denotes a waterproof cord bush for the first optical fiber 18 and the second optical fiber 15.

The present invention is configured as described above. Then, it becomes as follows. In the tank 2 of the tank lorry 1, in the illustrated example, in each tank chamber 4 of the tank 2, a flammable liquid as a dangerous substance is loaded in an oil depot or the like, transported, and then unloaded to a gas station or the like. You. The loading amount detecting device 5 of the tank truck 1 detects the loading amount of the flammable liquid loaded and unloaded in each tank chamber 4 of the tank 2 as described above. Then, the float 6 is arranged in each tank chamber 4 of the tank 2, and the rotating body 8 and the holes 9, 1 are provided.
0, the light projecting units 11, 12, the light receiving units 13, 14 and the like are arranged on the tank 2, that is, on each tank chamber 4, and the control unit 16, the display unit 17 and the like are provided inside the cab A and other places other than the tank 2. It is arranged other than above the tank 2, that is, other than inside each tank chamber 4 and other than each tank chamber 4 (see FIG. 7). The intervening mechanism 7 is disposed between each tank chamber 4 and the upper part of the tank chamber 4.
The first optical fiber 18 and the second optical fiber 15 are arranged above each tank chamber 4 and, for example, inside the cab A, and
0 and 31 are also arranged in the cab A, for example.

The loading amount is detected and displayed by the loading amount detection device 5 as follows. That is, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, etc., the liquid level of the liquid loaded in each tank chamber 4 of the tank 2 moves up and down with the loading and unloading. Then, the float 6 moves up and down for each tank chamber 4,
The rotator 8 rotates in the forward / reverse direction in response to the vertical movement of each float 6 via the respective intervening mechanisms 7.
This rotating body 8 has a large number of holes 9,
10 is double-circumferentially provided, and the double-circumferential holes 9 and
Two sets of light projecting units 11 and 12 and light receiving units 13 and 14 are provided on both sides of the rotating body 8 so as to be able to face each other. Accordingly, with respect to each tank chamber 4, when the rotating body 8 rotates in the normal or reverse direction, first, the light emitted from the light projecting unit 11 via the first optical fiber 18 determines whether or not the opposing inner phase side hole 9 exists. Corresponding transmission and blocking are repeated,
Accordingly, the light is received by the light receiving unit 13 as a light pulse. Similarly, the light emitted from the light projecting unit 12 via the first optical fiber 18 repeatedly transmits and blocks according to the presence or absence of the hole 10 on the opposite external phase side, and is thus received by the light receiving unit 14 as a light pulse. .

Each of the light receiving sections 13, 1 is provided for each tank chamber 4.
The light pulses from 4 are respectively guided to the control unit 16 via the second optical fiber 15, and are photoelectrically converted and counted by the control unit 16 in the cab A, for example. The liquid loading amount is calculated and displayed on the attached display unit 17 as shown in FIG.

The determination of the increase or decrease of the load in the tank chamber 4 in the load detector 5 in the illustrated example will be described in further detail. In this loading amount detecting device 5, (1) in FIG.
As shown in the figure, the holes 9 and 10 of the rotating body 8 are provided around the inner and outer doubly, and the inner phase side holes 9 and the outer phase side holes 10 are provided.
Are slightly shifted in the circumferential direction of the corresponding positions. As described above, since the holes 9 and 10 corresponding to the inside and outside are slightly displaced from each other, the holes 9 on the inner phase side are caused by the vertical movement of the float 6 and the forward / reverse rotation of the rotating body 8. There is a slight time lag between the transmission and blocking of light by the external phase and the transmission and blocking of light by the holes 10 on the outer phase side. Thus, the light pulse obtained at the light receiving unit 13 facing each hole 9 on the inner phase side and the light receiving unit 14 facing each hole 10 on the outer phase side
The light pulse obtained at the time is also slightly shifted in time and has a phase difference. Then, the control unit 16 compares the phase difference and the lead / lag between the light pulse on the inner phase side and the light pulse on the outer phase side, that is, for the corresponding light pulse, By determining which one of the rotating body 8 has risen first or has fallen (which one has been received first), it is possible to determine whether the rotation of the rotating body 8 is normal rotation or reverse rotation, and whether the float 6 has been raised or lowered. Is done. Thus, it is determined whether the load of the tank chamber 4 of the tank 2 has increased or decreased, and the load is calculated by addition or subtraction, and is displayed on the display unit 17.

Incidentally, in the loading amount detecting device 5,
It is also possible to carry out the load amount increase / decrease determination without using the load amount increase / decrease determination method as in the illustrated example described above. For example, the rotating body 8 is provided with only one of the holes 9 or the holes 10 and is provided with a dedicated sensor for detecting whether the rotation of the rotating body 8 is normal rotation or reverse rotation. The rotating body 8 is also provided with a mark to be detected by such a sensor. Then, based on the detection of this sensor, the control unit 1
At 6, the normal / reverse rotation of the rotating body 8, the lifting / lowering of the float 6, and the increase / decrease of the loaded amount are determined, and based on such determination, the counted light pulses are added or subtracted. Can be

Now, the loading amount detecting device 5 for the tank truck 1 according to the present invention is as follows. First, in this loading amount detection device 5, the tank 2
Float 6, intervention mechanism 7, rotating body 8, holes 9, 10, light projecting units 11, 12, light receiving unit 13, inside or on tank 2, that is, inside each tank room 4 or on each tank room 4. 14 mag
The system does not use electricity at all, and there is no danger such as electric spark. In other words, in view of the loading of a flammable liquid as a dangerous substance, the current is supplied to and applied to the tank 2 and the tank 2 where explosion-proof and explosion-proof specifications are required, that is, in each tank chamber 4 and each tank chamber 4. The electrical configuration operated by
Not used at all. The control unit 16, the display unit 17, the light projectors 30, 31 and the like of the loading amount detection device 5 are arranged in a cab A or the like where explosion-proof and explosion-proof specifications are not required, although they are configured to use electricity. Further, in the loading amount detection device 5, the light projecting units 11, 12 and the light receiving units 13, 14 on the tank 2, that is, each tank chamber 4, and the control unit 16 and the light projectors 30, 31 in the cab A are connected to each other. They are connected by the first optical fiber 18 and the second optical fiber 15, and no electrical configuration is used for signal transmission.
As described above, in the loading amount detection device 5, no electrical configuration is used in the tank 2, on the tank 2, and in the vicinity of the tank 2, and there is no danger of generating an electric spark or the like.

Secondly, the load detecting device 5 of the tank truck 1 does not use any electrical components in the tank 2, on the tank 2, and in the vicinity of the tank 2, and is strict and sophisticated. Explosion-proof and explosion-proof specifications are not required, and the configuration is simplified and correspondingly simplified. In addition, although the configuration inside the cab A is an electrical configuration using electricity, the inside of the cab A and the like do not require explosion-proof and explosion-proof specifications, so that the configuration is simple and easy. .

Third, the load amount detecting device 5 includes a float 6, an intervening mechanism 7, a rotating body 8, holes 9, 10, light emitting units 11, 12, light receiving units 13, 14, and a first optical fiber 1.
8, the second optical fiber 15 and the like are arranged in the vicinity of the tank 2, and no explosion-proof specification that may cause troubles in these functions and operations is not used. And furthermore, their construction is simple and their interrelationship is also simple. Further, the control unit 16, the display unit 17, and the like have a simpler configuration than a conventional one. Therefore, the loading amount detection device 5 having such a configuration has a simple configuration as a whole, and its operation is accurate and easy to operate. Therefore, the possibility of malfunction is extremely low and the detection accuracy is excellent.

[0036]

As described above, the tank lorry loading amount detecting apparatus according to the present invention has a number of holes formed in a rotating body driven by a float, and a light emitting part connected to an optical fiber and a light receiving part connected to the hole. The light pulse obtained by combining the parts
The following effects are exhibited by counting the control unit and displaying the load amount on the display unit.

First, explosion-proof specifications are not required. That is, in this tank lorry loading amount detection device, a float, an interposition mechanism, a rotating body,
The configuration of the hole, the light projecting part, the light receiving part, etc. is not based on the electric type, and the signal transmission between the control part and the display part arranged inside the cab and other places, etc. Utilizing optical fiber. Therefore, there is no danger of electric spark or spark ignition in the configuration near the tank in the tank or on the tank, etc., and it is extremely excellent in terms of safety. There is no need to adopt. That is, this tank lorry loading amount detection device does not require sophisticated and strict explosion-proof and explosion-proof specifications in the vicinity of the tank inside or above the tank.

Second, the configuration is simplified and simplified.
That is, as described above, the load detecting device of the tank lorry is excellent in safety and does not need to be provided with explosion-proof and explosion-proof specifications. It is also excellent in cost, such as low cost.

Third, a more accurate detection is realized.
That is, this tank lorry loading amount detection device includes a float, an interposition mechanism, a rotating body, a hole, a light emitting portion, a light receiving portion, an optical fiber, etc., which are arranged in the tank or on the tank near the tank. Explosion-proof specifications that may cause problems in function and operation are not used. Further, these components are simple and the mutual relationship is also simple, and the control unit 16, the display unit 17 and the like also have a simple configuration. Thus, accurate detection can be realized without occurrence of erroneous operations due to a complicated configuration as in the above-described conventional example. As described above, the effects exhibited by the present invention are remarkable and large, for example, all the problems existing in this type of conventional example are solved.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a main part of a device for detecting a loaded amount of a tank lorry according to the present invention, which is used for describing an embodiment of the present invention.

FIGS. 2A and 2B are explanatory views of an embodiment of the present invention, in which FIG. 1A is a side view of a main part, and FIG. 2B is a perspective view of a float or the like.

FIGS. 3A and 3B are views for explaining the embodiment of the present invention, wherein FIG. 1A is a side view of a float or the like, FIG. 3B is a plan view of an upper pulley, and FIG. It is.

FIG. 4 is a view for explaining an embodiment of the present invention, showing a rotating body, a light projecting unit, a light receiving unit, etc., wherein FIG.
The figure is an explanatory plan view.

FIGS. 5A and 5B are views for explaining the embodiment of the present invention, in which FIG. 1A is a side view of the rotating body, and FIG.

FIG. 6 is provided for explanation of the embodiment of the present invention, and shows one of display portions.
It is a front explanatory view of an example.

FIG. 7 is an explanatory side view of the tank lorry.

DESCRIPTION OF SYMBOLS 1 Tank lorry 2 Tank 5 Loading amount detection device 6 Float 7 Interposition mechanism 8 Rotating body 9 Hole 10 Hole 11 Light emitting unit 12 Light emitting unit 13 Light receiving unit 14 Light receiving unit 15 Second optical fiber 16 Control unit 17 Display Part 18 First optical fiber A Cab

Claims (3)

[Claims] 1. A detecting device for detecting a loading amount of a flammable liquid, which is a dangerous substance, loaded on a tank of a tank lorry, the float being disposed in the tank and moving up and down with the liquid level of the liquid. A rotating body that rotates forward and backward in response to the vertical movement of the float via an interposition mechanism, a large number of holes provided around the rotating body at a constant pitch, and a rotating body that can face the holes. A light projecting portion, which is provided to face and is guided by the first optical fiber, and which faces the light projecting portion via the rotating body, and corresponds to the presence or absence of the hole facing the light emitted from the light projecting portion. A light receiving unit that is transmitted and cut off and received as an optical pulse, receives a light pulse from the light receiving unit to a control unit, and counts the light pulse from the second optical fiber by photoelectric conversion. Then, the amount of liquid loaded in the tank is calculated. An apparatus for detecting a loaded amount of a tank lorry, comprising: a control unit; and a display unit for displaying the loaded amount of the tank calculated by the control unit. 2. The apparatus according to claim 1, wherein each of the holes of the rotating body is double-circularly provided inside and outside, and the inside and outside holes are located at corresponding positions inside and outside, respectively. And the corresponding parts are slightly shifted in the circumferential direction, and thus the slight positional shift between the corresponding holes inside and outside, and the holes based on this. Based on the slight time lag between the transmission and blocking of the light between them and the slight phase difference between the corresponding two-phase light pulses, the control unit determines whether the rotation of the rotator is normal or reverse, and An apparatus for detecting a loaded amount of a tank lorry, wherein the apparatus detects a vertical movement and an increase or a decrease in the loaded amount of the tank. 3. The apparatus according to claim 1, wherein the float is disposed in the tank, and the rotating body, the light projecting unit, the light receiving unit, and the like are disposed on the tank. The load detecting device for a tank truck, wherein the control unit, the display unit, and the like are arranged in the tank and in a cab other than the tank.