Concrete pump truck

Abstract

To provide a concrete pump vehicle that cleans concrete pipes using cleaning water in a water tank mounted on a deck. [Solution] The wash water in the water tank 3 is heated using electricity from an external power source (not shown) or an on-board battery (not shown), so it can be heated inexpensively and the wash water can be warmed to a specified temperature without taking a long time. Conventionally, if the wash water in the tank or in the wash piping freezes while the ready-mixed concrete is being unloaded from a traveling vehicle at the work site, there was also the problem that engine fuel was needed just to warm the wash water, and it took a little while for the wash water to warm up.

Description

[Technical Field]

[0001] This invention relates to a concrete pump vehicle that cleans concrete pipes using cleaning water stored in a water tank mounted on the deck. [Background technology]

[0002] Concrete pump vehicles that wash concrete pipes using wash water stored in a water tank mounted on the deck have been known for some time. In this type of concrete pump vehicle, the wash water is heated using a heat exchanger 134 by engine exhaust gas sent from an exhaust pipe 111, and the wash water heated by the engine exhaust gas is sent to a tank 131. The heated wash water in the tank 131 is then discharged from wash pipes 136 (see FIG. 5) by the discharge force of a pump 132, thereby preventing the wash water in the tank 131 and the wash water in the wash pipes 136 from freezing (see, for example, Patent Document 1). Here, FIG. 4 is an overall view of a conventional traveling vehicle, and FIG. 5 is an explanatory view of the piping of the same traveling vehicle.

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-179727 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] However, in the conventional traveling vehicle 101, the engine was driven to heat the wash water in order to prevent the wash water in the tank 131 and the wash water in the wash piping 136 from freezing while ready-mixed concrete was being unloaded from the traveling vehicle 101 at the work site, so fuel was needed just to heat the wash water, which posed the problem of high costs for heating the wash water.In addition, because the wash water was heated by exhaust gas, there was also the problem that it took a little long time for the wash water to warm up from a cold state.

[0005] The purpose of this invention is to solve the above problems and to provide a concrete pump truck that can use heated wash water without the cost of heating the wash water being high and without requiring a long time. [Means for solving the problem]

[0006] In order to solve the above problems and achieve the above objects, a first aspect of the present invention is a concrete pump vehicle that uses cleaning water in a water tank mounted on a deck to clean concrete pipes, The vehicle comprises a water tank mounted on the deck and containing wash water, an immersion heater connected to the inside of the control box via an immersion heater wiring for heating the wash water in the water tank, a temperature sensor connected to the inside of the control box via a temperature sensor wiring for measuring the temperature of the wash water in the water tank, equipment current wiring connected to the immersion heater wiring and the temperature sensor wiring within the control box for supplying electricity to the immersion heater via the immersion heater wiring and to the temperature sensor via the temperature sensor wiring, an external power supply wiring that can be connected to the equipment current wiring and supplies electricity from an external power source to the equipment current wiring, an on-board battery that is mounted on the vehicle and can be charged by the driving force of the vehicle engine, and a battery wiring that can be connected to the equipment current wiring and supplies electricity from the on-board battery to the equipment current wiring, wherein the equipment current wiring can be switched between being connected to either the external power supply wiring or the battery wiring.

[0007] According to this invention, when the onboard battery is being charged using the driving force of the vehicle engine or when the onboard battery has a surplus charge capacity, the onboard battery can be used to heat the wash water in the water tank. When the onboard battery cannot be charged using the driving force of the vehicle engine and the onboard battery has a surplus charge capacity, the wash water in the water tank can be heated using an external power source. This allows the wash water in the water tank to be heated inexpensively without wasting electricity. In addition, because the wash water in the water tank is heated by an immersion heater, it does not take a long time to warm up to the desired temperature. This prevents the wash water in the water tank from freezing when cleaning concrete pipes.

[0008] The second aspect of the present invention is a concrete pump truck according to the first aspect, characterized in that the equipment power wiring can be switched between the external power supply wiring and the battery wiring using a selector switch.

[0009] According to the present invention, the changeover switch can be used to switch between the external power supply wiring and the battery wiring, making it easy to switch between the external power supply wiring and the battery wiring.

[0010] The third aspect of the present invention is a concrete pump truck according to the first aspect, characterized in that the end of the equipment power wiring can be manually switched by an operator to either the end of the equipment power wiring or the end of the battery wiring.

[0011] According to this invention, the operator can manually switch the connection between the end of the equipment power wiring and either the end of the external power supply wiring or the end of the battery wiring, so that the connection can be reliably switched between either the external power supply wiring or the battery wiring.

[0012] The fourth aspect of the present invention is a concrete pump truck according to the first aspect, characterized in that it has a water pipe through which water is supplied from a water supply source to a water tank, a water pipe heater wiring connected to the equipment power wiring within a control box, and a water pipe heater connected to the water pipe heater wiring and wound spirally around the water pipe to heat the water in the water pipe.

[0013] According to this invention, the water in the water pipe is heated by the water pipe heater, so that the water in the water pipe can be prevented from freezing even when cleaning concrete pipes. [Effects of the Invention]

[0014] According to the present invention, the cost of heating the wash water is not high, and the heated wash water can be used without requiring a long time. [Brief explanation of the drawings]

[0015] [Figure 1] 1A is a side view of a concrete pump truck according to an embodiment of the present invention, and FIG. 1B is an enlarged view of a portion of the concrete pump truck near a water tank. [Figure 2] FIG. 2 is a top view of the water tank of the concrete pump truck. [Figure 3] FIG. 2 is a diagram showing a changeover switch of the concrete pump truck. [Figure 4] FIG. 1 is an overall view of a conventional traveling vehicle body. [Figure 5] FIG. 1 is an explanatory diagram of piping used in a conventional vehicle body. DETAILED DESCRIPTION OF THE INVENTION

[0016] A concrete pump truck according to one embodiment of the present invention will be described with reference to the drawings. Here, Fig. 1(a) is a side view of the concrete pump truck according to one embodiment of the present invention, Fig. 1(b) is an enlarged view of a portion of the concrete pump truck near the water tank, and Fig. 2 is a top view of the water tank of the concrete pump truck.

[0017] The concrete pump vehicle 1 cleans the concrete pipe 4 (see FIG. 2) using cleaning water in a water tank 3 mounted on a deck 2. In this embodiment, the concrete pipe 4 is cleaned using the cleaning water in the water tank 3, but this is not limited to this, and the cleaning water in the water tank 3 may also be used to clean other vehicles of the concrete pump vehicle 1 that are connected to the concrete pipe 4.

[0018] First, we will explain the main components of a conventional concrete pump truck 1. The concrete pump truck 1 has a three-stage boom 6, the base end of which is attached to a rotating table 5 rotatably mounted on a deck 2, and is capable of being raised and lowered. The base end of a middle boom 6b is connected to the tip of the lower boom 6a, and the base end of an upper boom 6c is connected to the tip of the middle boom 6b. A concrete pipe 4 is attached to the three-stage boom 6, and is supported along the lower boom 6a, middle boom 6b, and upper boom 6c. In this way, the three-stage boom 6 can move the tip of the concrete pipe 4 to the location where concrete is to be poured.

[0019] A concrete hopper 7 into which concrete is poured is provided at the rear of the concrete pump truck 1. The concrete in this concrete hopper 7 is sent to a concrete pump 8 via a concrete pipe 4, and another concrete pipe 4 is connected to the other end of the concrete pump 8, which is in turn connected to a concrete pipe 4 attached to the boom 6. In this way, the concrete in the concrete hopper 7 can be discharged by the concrete pump 8 from the concrete pipe 4 at the tip of the three-stage boom 6.

[0020] Next, we will explain the characteristic parts of the concrete pump truck 1. The concrete pump truck 1 has a water tank 3, an immersion heater 10, a temperature sensor 11, an on-board battery (not shown), and a water pipe heater 13.

[0021] The water tank 3 is mounted on the deck 2 and contains cleaning water. The concrete pipe 4 is cleaned with the cleaning water in the water tank 3. That is, the concrete stored in the concrete hopper 7 is discharged from the concrete pipe 4 at the tip of the three-stage boom 6 via the concrete pipe 4, and after the concrete has been discharged from the concrete pipe 4, the cleaning water in the water tank 3 is sprayed onto the concrete pipe 4 through a cleaning hose (not shown), thereby cleaning the concrete pipe 4.

[0022] Immersion heater 10 is connected to control box 14 via immersion heater wiring 15 and can heat the flush water in water tank 3. In this embodiment, a single-phase B2 type water heater (sheath material: copper pipe with nickel plating finish / made of SUS316L) (manufactured by Sakaguchi Electric Heating Co., Ltd.) is used as immersion heater 10. This immersion heater 10 can be inserted directly into the flush water from the top of water tank 3 to heat the flush water.

[0023] Electric thermostat 17 is attached to control box 14. Electric thermostat 17 has temperature sensor 11, which is connected to control box 14 via temperature sensor wiring 16 and is able to measure the flush water temperature in water tank 3. In this embodiment, a model EA Series (manufactured by Sakaguchi Electric Heating Co., Ltd.) is used as electric thermostat 17. By using this electric thermostat 17, the flush water temperature in water tank 3 is adjusted to a set water temperature.

[0024] The on-board battery (not shown) is mounted on the concrete pump truck 1 and can be charged by the engine driving force of the concrete pump truck 1. The on-board battery (not shown) is connected to battery wiring 19 via a sine wave inverter device 18. In this embodiment, an SI series sine wave inverter (manufactured by Celstar Industrial Co., Ltd.) (not shown) is used as the sine wave inverter device 18. By using this SI series sine wave inverter (not shown), it is possible to create an AC power waveform in which the positive and negative polarities alternate along a smooth curve, enabling more stable electronic control and phase control.

[0025] The device current supply wiring 20 is connected to the immersion heater wiring 14 and the temperature sensor wiring 16 inside the control box 14. Specifically, with respect to the temperature sensor wiring 16, the device current supply wiring 20 is connected in the following order: device current supply wiring 20 → electric thermostat main body 17a → temperature sensor wiring 16 → temperature sensor 11. As will be described later, the device current supply wiring 20 supplies electricity sent from an on-board battery (not shown) or an external power source (not shown) to the immersion heater 10 via the immersion heater wiring 15, and also to the temperature sensor 11 of the electric thermostat 17 via the temperature sensor wiring 16. In this way, by connecting the device current carrying wiring 20 to the external power supply wiring 21 connected to an external power supply (not shown), electricity sent from the external power supply is conducted to the device current carrying wiring 20 via the external power supply wiring 21, and by connecting the device current carrying wiring 20 to the battery wiring 19 connected to the vehicle battery (not shown), electricity sent from the vehicle battery (not shown) is conducted to the device current carrying wiring 20. As a result, the device current carrying wiring 20 is connected to the immersion heater wiring 15 within the control box 14, so electricity is conducted from the device current carrying wiring 20 via the immersion heater wiring 15 to the immersion heater 10, and as the device current carrying wiring 20 is connected (indirectly) to the temperature sensor wiring 16 within the control box 14, electricity is conducted from the device current carrying wiring 20 to the temperature sensor 11 via the temperature sensor wiring 16.

[0026] The changeover switch 22 is a switch that switches the connection of the device power wiring 20 between the external power supply wiring 21 and the battery wiring 19, and has a battery wiring connection button 23 and an external power supply wiring connection button 24 (see Figure 3). When the battery wiring connection button 23 is pressed, the device power wiring 20 and the battery wiring 19 are connected, and when the external power supply wiring connection button 24 is pressed, the device power wiring 20 and the external power supply wiring 21 are connected. Here, Figure 3 is a diagram showing the changeover switch of a concrete pump truck in one embodiment of the present invention. When the device power wiring 20 and the external power supply wiring 21 are connected, the external power supply lamp 25 on the top of the control box 14 lights up, and when the device power wiring 20 and the battery wiring 19 are connected, the battery lamp 26 on the top of the control box 14 lights up.Therefore, by looking at the external power supply lamp 25 and the battery lamp 26 on the top of the control box 14, the worker can confirm whether power is being supplied from an external power supply (not shown) or from the vehicle battery (not shown).

[0027] In this way, in the concrete pump truck 1 of this embodiment, when the onboard battery (not shown) is being charged using the driving force of the vehicle engine (not shown) or when the onboard battery (not shown) has sufficient charge capacity, the cleaning water in the water tank 3 can be heated using the onboard battery (not shown), and when the onboard battery (not shown) cannot be charged using the driving force of the vehicle engine (not shown) and the onboard battery (not shown) does not have sufficient charge capacity, the cleaning water in the water tank 3 can be heated using an external power source (not shown).

[0028] Water pipe heater 13 is a heater that heats water in water pipe 27 connected to water tank 3. Here, water pipe 27 is a pipe through which water is supplied to water tank 3 from a water supply source (not shown). Water pipe heater wiring 28 connected to water pipe heater 13 is connected to device power wiring 20 inside control box 14. Water pipe heater 13 connected to water pipe heater wiring 28 is wound spirally around water pipe 27, thereby heating the water in water pipe 27.

[0029] Next, a procedure for heating the cleaning water in the water tank 3 of the concrete pump truck 1 and the water in the water pipe 27 in one embodiment of the present invention will be described. The reason for heating the cleaning water in the water tank 3 and the water in the water pipe 27 is to prevent the cleaning water in the water tank 3 and the water in the water pipe 27 from freezing so that the cleaning water in the water tank 3 can be used to clean the concrete pipe 4. Cleaning of the concrete pipe 4 is performed after the concrete in the concrete hopper 7 of the concrete pump truck 1 has been completely discharged from the concrete pipe 4 at the tip of the three-stage boom 6.

[0030] The cleaning water in the water tank 3 of the concrete pump truck 1 and the water in the water pipe 27 are heated while the concrete is being discharged from the concrete pipe 4. As a result, once discharge from the concrete pipe 4 is completed, the concrete pipe 4 can be immediately washed using the cleaning water in the water tank 3.

[0031] First, the external power supply wiring 21 is connected to an external power supply (not shown). This allows the external power supply (not shown) to be used to energize the external power supply wiring 21. Note that if the external power supply (not shown) cannot be used, there is no need to connect the external power supply wiring 21 to the external power supply (not shown).

[0032] Next, the operator presses either the battery wiring connection button 23 or the external power supply wiring connection button 24 of the selector switch 22. This allows electricity to be supplied to the immersion heater 10, temperature sensor 11, and water pipe heater 13 from either the vehicle battery (not shown) or the external power supply (not shown) via the equipment power supply wiring 20, but in this case, since the vehicle battery (not shown) often has a sufficient charge capacity, the battery wiring connection button 23 is usually pressed in most cases.

[0033] In this way, the wash water in the water tank 3 is heated, but the heating temperature of the wash water in the water tank 3 is set by the electric thermostat 17, and when the temperature sensor 11 indicates that the temperature of the wash water in the water tank 3 has reached the temperature set by the electric thermostat 17, the electric thermostat 17 stops the immersion heater 10 from heating the wash water in the water tank 3, and the temperature of the wash water in the water tank 3 is adjusted to the temperature set by the electric thermostat 17.

[0034] As explained above, when the onboard battery (not shown) is being charged using the driving force of the vehicle engine (not shown) or when the onboard battery (not shown) has a surplus charge capacity, the onboard battery (not shown) can be used to heat the wash water in the water tank 3. When the onboard battery (not shown) cannot be charged using the driving force of the vehicle engine (not shown) and the onboard battery (not shown) does not have a surplus charge capacity, the wash water in the water tank 3 can be heated using an external power source (not shown). This allows the wash water in the water tank 3 to be heated inexpensively without wasting electricity. Also, because the wash water in the water tank 3 is heated by the immersion heater 10, it does not take a long time to warm the wash water to a predetermined temperature. This prevents the wash water in the water tank 3 from freezing when washing the concrete pipe 4.

[0035] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the scope of the utility model registration claims, not by the above description, and is intended to include all modifications within the meaning and scope of the utility model registration claims.

[0036] (Variation 1) Next, a first modified example of the embodiment of the concrete pump truck 1 of the present invention will be described.

[0037] The difference between the first modified example of the present invention and the first embodiment of the present invention is that, while in the first embodiment of the present invention, a selector switch 22 is used to switch the connection of the device current wiring 20 to either the external power supply wiring 21 or the battery wiring 19, in the first modified example, an operator manually connects the device current wiring 20 to either the external power supply wiring 21 or the battery wiring 19. In other words, an operator manually switches the connection of the end of the device current wiring 20 to either the end of the external power supply wiring 21 or the end of the battery wiring 19. Note that the rest of the first modified example of the present invention is the same as the first modified example of the present invention and the first embodiment of the present invention, so a description thereof will be omitted.

[0038] In this way, the worker can manually switch the connection between the end of the equipment power wiring 20 and either the end of the external power supply wiring 21 or the end of the battery wiring 19, so that the connection can be reliably switched between either the external power supply wiring 21 or the battery wiring 19. [Explanation of symbols]

[0039] 1. Concrete pump truck 2 decks 3. Water tank 4. Concrete piping 5 Swivel table 6. Boom 6a Lower boom 6b Middle boom 6c Upper boom 7 Concrete Hopper 8. Concrete Pump 10 Immersion heater 11 Temperature sensor 13 Water pipe heater 14 Control box 15 Immersion heater wiring 16 Temperature sensor wiring 17 Electric Thermostat 18 Sine wave inverter device 19 Battery wiring 20 Equipment energizing wiring 21 External power supply wiring 22 Selector switch 23 Battery wiring connection button 24 External power supply wiring connection button 25 External power lamp 26 Battery lamp 27 Water piping 28 Water piping heater wiring

Claims

1. A concrete pump vehicle that cleans concrete pipes using cleaning water in a water tank mounted on a deck, a water tank mounted on the deck for storing wash water; an immersion heater connected to the control box via an immersion heater wiring and heating the flush water in the water tank; a temperature sensor connected to the control box via a temperature sensor wiring and measuring the temperature of the wash water in the water tank; an equipment current-carrying wiring connected to the immersion heater wiring and the temperature sensor wiring within the control box, for supplying electricity to the immersion heater via the immersion heater wiring and to the temperature sensor via the temperature sensor wiring; an external power supply wiring that can be connected to the device current-carrying wiring and that conducts electricity from an external power supply to the device current-carrying wiring; An on-board battery that is installed in a vehicle and can be charged by the vehicle's engine power, a battery wiring that can be connected to the device current-carrying wiring and that conducts electricity from the vehicle battery to the device current-carrying wiring, A concrete pump truck characterized in that the equipment power wiring can be switched to connect to either the external power supply wiring or the battery wiring.

2. 2. The concrete pump truck according to claim 1, wherein the device power wiring can be switched to connect either the external power supply wiring or the battery wiring by a selector switch.

3. A concrete pump truck as described in claim 1, characterized in that the equipment power wiring can be manually switched and connected by an operator to either the end of the equipment power wiring or the end of the external power supply wiring.

4. a water pipe through which water is supplied from a water supply source to the water tank; a water piping heater wiring connected to the device power supply wiring in the control box; 2. A concrete pump truck as described in claim 1, further comprising a water pipe heater connected to the water pipe heater wiring and wound spirally around the water pipe to heat the water in the water pipe.

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