JP3008918U - Asphalt carrier - Google Patents

Abstract

(57) [Summary] [Structure] The input unit 20 of the asphalt transport vehicle inputs a detection signal sent from the detection device 14 provided in the weighing tank 10 on the plant side. The operating unit 30 is a power source that drives a tank pump 32 that discharges asphalt from the tank 50 of the asphalt transport vehicle to the measuring tank 10 and is a tank 50.
It is installed inside the. Then, the switching unit 40 receives the detection signal according to the change in the storage amount of the weighing tank 10 in the plant to which the asphalt is supplied, and the input unit 20.
The operation of the operating unit 30 for supplying asphalt is controlled by the detecting device 14 which detects that the storage amount of asphalt reaches a certain level after the start of the supply by starting the operating unit 30. And input section 2
0 controls to stop the operating unit 30. [Effect] Since the asphalt carrier automatically stops the driving of the tank pump, it is possible to prevent misunderstandings about the operator's stopping operation, and to match the planned usage of the plant for small-quantity, large-mix production. We can supply asphalt in response to small supply demands.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an asphalt carrier for supplying liquid asphalt to a plant for producing an asphalt mixture.

[0002]

[Prior art]

 When supplying liquid asphalt (hereinafter referred to as asphalt) mounted on an asphalt carrier to a storage tank of a plant, conventionally, the discharge port of the asphalt carrier is connected to the inlet of the storage tank and then mounted on the carrier. The tank pump was driven to discharge asphalt from the tank to the storage tank of the plant, and the operator manually stopped driving the tank pump when the required amount was discharged. At the plant, the asphalt was divided from the plant storage tank into small measuring tanks, weighed, and the amount of stone powder commensurate with that was mixed into the asphalt mixture.

[0003]

[Problems to be solved by the device]

 However, as a wide variety of small quantities of asphalt mix materials are produced, it is no longer necessary to temporarily store a large amount of asphalt in a plant storage tank. As a result of weighing by the measuring tank on the side, when the driving of the tank pump of the asphalt transport vehicle is stopped manually, the operator sometimes forgets to stop the operation due to a mistake.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a tank pump for supplying asphalt inside the tank, and operates the tank pump according to the change in the storage amount of the measuring tank in the plant to which the asphalt is supplied. The first means is an asphalt transport vehicle, which is equipped with controllable interlocking means. As a second means, the interlocking means of the asphalt carrier is an input section for receiving a signal according to a change in the storage amount in the weighing tank connected to the asphalt storage tank, and a tank for discharging the asphalt from the tank to the weighing tank. It is equipped with an operating unit that drives the pump, and a switching unit that controls the operating unit using its input unit.In addition, if the storage amount in the weighing tank reaches a certain amount due to asphalt that has begun to be supplied from the tank pump, etc. It is provided with an automatic detection unit that issues a control signal to the input unit. As a third means, the operation of a tank pump installed inside or outside the tank for supplying asphalt can be controlled by an interlocking device that can be controlled according to the change in the storage amount of the measuring tank in the plant to which the asphalt is supplied. There is an input section that receives a signal according to the change in the storage amount in the weighing tank connected to the asphalt storage tank, an operating section that drives a tank pump that discharges asphalt from the tank to the weighing tank, and its input section. In addition to a switching unit that controls the operating unit, an automatic detection unit that issues a control signal to the input unit when the storage amount of the measuring tank reaches a certain amount due to asphalt that has started to be supplied from the tank pump. It is an asphalt transport vehicle equipped with an interlocking device. As a fourth means, a hydraulic pump driven by an engine of an asphalt carrier, a hydraulic motor driven by hydraulic oil circulated in a route by the hydraulic pump, and an asphalt from a tank of the carrier by its hydraulic motor. A tank pump for supplying the oil and a tank pump arranged inside the tank, and a switching valve for selecting a path passing through the hydraulic motor or a path avoiding the hydraulic motor in the circulation path of the hydraulic oil. The asphalt carrier is characterized in that the switching valve is provided and can be switched based on a command from a plant to which the asphalt is supplied.

[0005]

[Action]

 As described above, in the configuration according to the first means, the operation of the tank pump that supplies the asphalt is stopped when the storage amount in the measuring tank reaches a certain amount due to the asphalt that has been supplied from the tank pump. Asphalt can be supplied without being clogged by the tank pump located inside the tank while controlling it. In addition, as the second means, the interlocking means of the asphalt carrier is that the automatic detection unit issues a control signal to the input unit when the storage amount in the weighing tank reaches a certain amount due to the asphalt that has started to be supplied from the tank pump. , The input unit receives the signal corresponding to the change in the storage amount in the weighing tank connected to the asphalt storage tank, and the switching unit causes the switching unit to discharge the asphalt from the tank to the weighing tank. Controls the actuated part to be driven. As an asphalt transport vehicle interlocking device as a third means, the operation of the tank pump provided inside or outside the tank for supplying the asphalt is controlled according to the change in the storage amount of the measuring tank in the plant to which the asphalt is supplied. Since it is a controllable interlocking device, it can be mounted on a normal asphalt carrier to automatically control the automatic detection unit when the storage amount in the weighing tank reaches a certain amount due to the asphalt that has been supplied from the tank pump. To the input unit, the input unit receives a signal according to the change in the storage amount in the weighing tank connected to the asphalt storage tank, and the operating unit that drives the tank pump that discharges asphalt from the tank to the measuring tank is output. The switching unit is controlled by the input unit. Further, in the configuration according to the fourth means, the tank pump for supplying the asphalt is arranged inside the tank, so that the high temperature asphalt does not harden due to the outside temperature, and the plant command is issued. Based on this, the supply of asphalt from the tank pump will be started, and then the operation of the tank pump that will supply asphalt will be stopped if the storage amount in the measuring tank reaches a certain amount.

[0006]

【Example】

 FIG. 1 is an explanatory view of an asphalt transport vehicle according to the present invention. Reference numeral 10 denotes a weighing tank in a plant for manufacturing asphalt mixture by mixing stone powder or the like into asphalt, and a weighing device such as a load cell is provided above the weighing tank via a weighing frame 12. The weighing device also has a function as the detection device 14 for detecting the storage amount of asphalt by weight, but it may be a detection device for detecting the storage amount of asphalt from the volume or the liquid level. The asphalt transport vehicle is equipped with an input unit 20, an operating unit 30, and a switching unit 40. The input unit 20 inputs the detection signal transmitted from the detection device 14 on the plant side by a wire means. The operating unit 30 is a power source that drives a tank pump 32 that discharges asphalt from the tank 50 of the asphalt transport vehicle to the weighing tank 10, and is installed inside or outside the tank 50. The switching unit 40 controls the operation of the operating unit 30 that supplies the asphalt by the input unit 20 to which the detection signal is input according to the change in the storage amount of the weighing tank 10 in the plant to which the asphalt is supplied. Therefore, the detection device 14 that has detected that the storage amount of asphalt has reached a certain amount after the start of the supply by the start of the operation unit 30 automatically sends out a detection signal, and the input unit 20 that has been input receives the operation unit 30. Control to stop. Alternatively, when the detection signal cannot be input from the weighing tank 10 of the plant, the operator who saw the display of the detection device 14 which connected the hand switch SW to the input unit 20 and detected that the asphalt storage amount reached a certain level Operates the switch SW at hand to stop the supply, and sends a detection signal to the switching unit 40, and the switching unit 40 controls the operation unit 30 to stop. Next, the procedure when the asphalt carrier arrives at the plant will be described. First, the detection device 14 of the weighing tank 10 and the input unit 20 of the asphalt transport vehicle are electrically connected, the measuring tank 10 and the tank 50 are connected by the transfer pipe 52, and then the operating unit 30 is operated to operate the tank. The pump 32 starts transferring asphalt from the tank 50 of the asphalt carrier to the weighing tank 10. After that, when the storage amount of asphalt reaches a certain level, the detected detection device 14 sends a detection signal, and the input unit 20 operates the switching unit 40 to stop the operation unit 30. Regarding the control content, not only the control to stop the operating unit 30 when a certain amount is reached, but also the control on the plant side to start the supply of the operating unit 30 after the arriving asphalt transport vehicle finishes the supply preparation. When asphalt mixture is produced in large quantities with a small amount of measuring tank 10, it is repeatedly supplied to the measuring tank 10. Therefore, when starting and stopping the supply and stop of the tank pump of the asphalt transport vehicle intermittently is controlled. There is a match.

The asphalt supply system using the above-mentioned asphalt carrier will be described in more detail with reference to FIG. 2 which is an explanatory view of the asphalt supply system when the asphalt carrier is viewed from the side and FIG. 3 which is a plan view of the inside of the tank. To do. Reference numeral 34 is a hydraulic pump driven by the rotational force of the engine through a PTO device (not shown), 36 is a hydraulic motor driven by hydraulic oil circulated in a path 38 by the hydraulic pump 34, and tank pump 32 is the hydraulic motor 36. Is connected to the interlocking shaft and supplies asphalt from the tank 50 of the vehicle, and is disposed inside the tank 50. A switching valve 42 for switching control of the operating portion 30 is provided in the middle of the hydraulic oil circulation path 38, and a path 42a passing through the hydraulic motor 36 or a path 42b bypassing the hydraulic motor 36 can be selected. . Since the switching valve 42 is a solenoid valve, it can be switched and operated by a detection signal of the input section 20 based on a command from a plant to which asphalt is supplied. Next, the inside of the tank 50 will be described. Reference numeral 60 denotes a hot air pipe that is piped in the front-rear direction of the tank 50 in the vicinity where heat is conducted to the tank pump 32 arranged inside the tank 50, and the rear end portion 60b of the rear end plate of the tank 50 is provided. A burner 62 provided at the rear end of the loading platform is connected to the bottom opening. The front end portion 60f of the hot air tube 60 is opened above the front end plate of the tank 50 to exhaust the burner 62. Alternatively, the hot air pipe 60 may be piped in a U shape inside the tank 50, and the front end portion 60f may be attached to the rear end plate of the tank 50 similarly to the rear end portion 60b. Reference numeral 70 denotes a transfer passage for supplying asphalt, which is provided substantially parallel to the hot air tube 60, and has one end thereof opened into the tank 50. One end thereof is branched into a front intake port 70f located in front of the tank 50 and a rear intake port 70b located in the rear of the tank 50. When supplying asphalt, it is possible to efficiently inhale from the bottom surface of the tank 50. . The other end 74 of the transfer passage 70 is attached to the upper end of the rear end plate of the tank 50, opens to the outside as a discharge port, and is connected to the measuring tank 10 by a transfer pipe 52. 72, which is located in the middle of the transfer passage 70, is a discharge / intake switching valve that distributes the asphalt pumped from the tank pump 32 to one end 70f, 70b of the transfer passage 70 or the other end 74, and the other end of the other transfer passage 70. Asphalt is sucked into the tank pump 32 from 74 or the ends 70f and 70b. A valve operation handle 76 for switching the discharge / intake switching valve 72 is attached to the upper portion of the tank 50. Reference numeral 78 is a manhole for injecting a large amount of asphalt into the tank 50.

Another embodiment will be described. The input section 20 of the asphalt carrier is equipped with a connection section with the switching section 40 at the tip of a transfer tube 52 for transferring asphalt to the weighing tank 10, and is connected to the switching section 40 by a connection line along the transfer tube 52. With this arrangement, the tip of the transfer pipe 52 can be electrically connected to the detection device 14 when the tip end of the transfer pipe 52 is attached to the measuring tank 10, so that the work efficiency can be improved.

Further, a clutch may be provided as the switching unit 40 on the shaft connecting the PTO device interlocking with the engine of the asphalt transport vehicle as the operating unit 30 and the tank pump 32. As a result, when the storage amount of asphalt reaches a certain level, the driving force of the PTO device for driving the tank pump 32 cannot be transmitted by disconnecting the clutch, so that the tank pump 32 can be stopped. In this case, the circulation path 38 and the like in the above embodiment can be omitted, and the number of parts can be reduced and the cost can be reduced.

By installing a transmitter in the detection device 10 on the plant side and a receiver in the input unit 20 of the asphalt transport vehicle, and connecting the detection device 10 and the input unit 20 by a wireless device, the detection device 10 Since it is possible to prevent a poor electrical connection between the input section 20 and the input section 20, it is possible to provide a reliable control system.

Further, by operating an electric motor as the operating unit 30 according to an on / off command from the input unit 20, it is possible to directly control the start / stop of the electric motor as a function of the switching unit 40. The electric motor is not suitable for an on-vehicle type due to its current weight and volume, but it can be used for the present invention by supplying the power source from the general power source of the plant instead of the vehicle battery.

In the above embodiment, the case where the control device is incorporated into the asphalt transport vehicle has been described. However, it is incorporated into a normal asphalt transport vehicle as a retrofit, and the drive of the tank pump is automatically stopped in response to a request from the plant side. Is also possible. The control device is an interlocking device that can control the operation of a tank pump provided inside or outside the tank for supplying asphalt according to the change in the storage amount of the measuring tank in the plant to which the asphalt is supplied. And an input unit that receives a signal according to the change in the storage amount in the weighing tank connected to the asphalt storage tank, an operating unit that drives a tank pump that discharges asphalt from the tank to the weighing tank, and It has a switching unit that controls its operating unit with an input unit, and it automatically sends a control signal to the input unit when the storage volume of the measuring tank reaches a certain amount due to asphalt that has begun to be supplied from the tank pump. It is an interlocking device for an asphalt transport vehicle equipped with a detection unit.

[0013]

[Effect of device]

 As described above, according to the present invention, the asphalt transport vehicle automatically stops the driving of the tank pump, so that it is possible to prevent the operator's mistaken recognition of the stop operation, and also to plan a plant for small-volume and high-mix production. It is possible to supply asphalt in response to a demand for a fine supply amount according to the amount used. The asphalt transport vehicle interlocking device as the second means enables the tank pump to be controlled by the automatic detection of the measuring tank which is not required by the operator, and the asphalt transport vehicle interlocking device as the third means enables the normal operation. It is possible to install it on an asphalt transport vehicle that does not work together. In the configuration according to the fourth means, since the tank pump that supplies asphalt is located inside the tank, the high temperature asphalt hardens due to the outside temperature. Since it does not do so, the contribution in the industry is great.

[Brief description of drawings]

FIG. 1 is an explanatory view of an asphalt supply system according to the present invention.

FIG. 2 is a detailed explanatory view of an asphalt supply system according to the present invention.

FIG. 3 is a plan view of the inside of the tank.

[Explanation of symbols]

10 ... Measuring tank, 14 ... Detecting device, 20 ... Input section,
30 ... Operating part, 32 ... tank pump, 40 ... switching part

Claims (4)

[Scope of utility model registration request] 1. A tank pump for supplying asphalt is provided inside a tank, and the operation of the tank pump is provided with interlocking means that can be controlled according to changes in the storage amount of a measuring tank in a plant to which the asphalt is supplied. An asphalt carrier that is equipped with. 2. The operation means for driving an input unit for receiving a signal according to a change in storage amount in a measuring tank connected to an asphalt storage tank and a tank pump for discharging asphalt from the tank to the measuring tank. Section and a switching section that controls the operating section by its input section, and a control signal is input to the input section when the storage amount of the measuring tank reaches a certain amount due to the asphalt that has begun to be supplied from the tank pump. The asphalt transport vehicle according to claim 1, further comprising an automatic detection unit that emits light. 3. An interlocking device capable of controlling the operation of a tank pump provided inside or outside a tank for supplying asphalt according to a change in the storage amount of a measuring tank in a plant to which the asphalt is supplied. The input unit that receives a signal according to the change in the storage amount in the weighing tank connected to the asphalt storage tank, the operating unit that drives the tank pump that discharges asphalt from the tank to the measuring tank, and the input unit that An interlocking device that includes a switching unit that controls the operating unit and that includes an automatic detection unit that issues a control signal to the input unit when the storage amount in the weighing tank reaches a certain amount due to asphalt that has begun to be supplied from the tank pump. Asphalt carrier equipped with. 4. A hydraulic pump driven by an engine of an asphalt carrier, a hydraulic motor driven by hydraulic oil circulated in a route by the hydraulic pump, and asphalt supplied from a tank of the carrier by the hydraulic motor. A tank pump that is arranged inside the tank, and a switching valve that selects a path that passes through the hydraulic motor or a path that avoids the hydraulic motor, in the hydraulic oil circulation path, An asphalt transport vehicle, wherein the switching valve can be switched based on a command from a plant to which the asphalt is supplied.