Automatic water pump switching system for double-drum road roller

Abstract

The utility model provides a kind of water pump automatic switching system of double steel roller road roller, including battery, water pump switch, watering enable switch, controller, main water pump and standby water pump;Controller is connected with water pump switch, watering enable switch, main water pump and standby water pump respectively, and battery is connected with water pump switch, watering enable switch, controller, main water pump and standby water pump respectively;Three gears are equipped on water pump switch, and they are main water pump switching gear, standby water pump switching gear and automatic switching gear respectively.The utility model utilizes controller, water pump switch, watering enable switch, realizes the short-time exchange continuous work of two water pumps, reduces the probability of water pump damage.

Description

Technical Field

[0001] This utility model relates to a water pump switching system, and more specifically to an automatic water pump switching system for a double-drum road roller. Background Technology

[0002] A double-drum roller is a machine that uses two steel drums to compact roads. The drums work together, one in front of the other, and are suitable for compacting various materials such as base layers, subbase layers, and asphalt surface layers. It is an indispensable compaction machine for road construction.

[0003] In the initial stage of asphalt pavement construction, the asphalt, freshly laid onto the road surface, has a very high surface temperature and strong adhesion. When using a double-drum roller for pavement compaction, the rough surfaces of the metal drums at the front and rear of the roller often cause the metal drums to stick to the hot asphalt, resulting in bulges, uneven compaction, an unsightly appearance, and potholes, severely impacting construction quality and efficiency.

[0004] To address the issue of steel drum adhesion to asphalt, double-drum rollers are typically equipped with a water spray system for both the front and rear drums. This system lubricates the drum surfaces with water. The water acts as a barrier between the steel drum and the high-temperature asphalt, aiming to reduce or eliminate the adhesion problem.

[0005] Current double-drum rollers typically employ a water spray system with a main pump and a backup pump. This is to prevent issues arising from the inability to promptly replace parts in case of a single pump failure, which could lead to the steel drum sticking to the hot asphalt and affecting construction progress and quality. The backup pump is usually located near the main pump. When the main pump fails, the electrical connector must be manually changed, which wastes considerable time and impacts construction schedule and quality. Furthermore, switching between the main and backup pumps is cumbersome, and prolonged operation of a single pump can cause the motor's coils to burn out, ultimately damaging the pump. Utility Model Content

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide an automatic water pump switching system for a double-drum road roller. Utilizing a controller, a water pump switching switch, and a water spraying enable switch, it enables short-term alternation and continuous operation of the two water pumps, reducing the probability of pump damage. Simultaneously, the water spraying energy-saving mode switch allows the water pump to spray more precisely according to the vehicle speed, improving water utilization efficiency, reducing the frequency of refilling by the driver, and improving overall construction quality.

[0007] To achieve the above objectives, this utility model employs the following technical solution: An automatic water pump switching system for a double drum roller includes a battery, a water pump switching switch, a sprinkler enable switch, a controller, a main water pump, and a standby water pump. The controller is connected to the water pump switching switch, the sprinkler enable switch, the main water pump and the standby water pump respectively, and the battery is connected to the water pump switching switch, the sprinkler enable switch, the controller, the main water pump and the standby water pump respectively. The water pump switching switch has three positions: main water pump switching position, standby water pump switching position, and automatic switching position.

[0008] Furthermore, the system also includes a water spraying energy-saving mode switch and a speed sensor; The water-sprinkling energy-saving mode switch is connected to the controller and sends a water-sprinkling energy-saving signal to the controller through the built-in contacts to activate the setting. The speed sensor is installed on the steel drum of the double drum roller. The speed sensor is connected to the controller and sends pulse signals to the controller. The battery is connected to the sprinkler energy-saving mode switch and the speed sensor respectively.

[0009] Furthermore, one pin of the controller is connected to the positive terminal of the battery, the 1A contact of the water pump switch, and the 2A contact of the sprinkler enable switch, respectively; the second pin of the controller is connected to the negative terminal of the battery, the first terminal of the main water pump, and the first terminal of the standby water pump, respectively; the third pin of the controller is connected to the 1B contact of the water pump switch, the fourth pin of the controller is connected to the 1C contact of the water pump switch, and the fifth pin of the controller is connected to the 2B contact of the sprinkler enable switch; the seventh pin of the controller is connected to the second terminal of the main water pump, and the eighth pin of the controller is connected to the second terminal of the standby water pump.

[0010] Furthermore, the 3A contact of the water-sprinkling energy-saving mode switch is connected to the positive terminal of the battery, the 3B contact of the water-sprinkling energy-saving mode switch is connected to pin six of the controller, the first end of the speed sensor is connected to the negative terminal of the battery, and the second end of the speed sensor is connected to pin nine of the controller.

[0011] Furthermore, the controller is equipped with a timing chip for recording the continuous operating time of the water pump.

[0012] Furthermore, the water-sprinkling energy-saving mode switch is configured with a first contact conduction position and a second contact conduction position; the first contact conduction position connects contact 3A and contact 3B, and inputs the water-sprinkling energy-saving signal to the controller.

[0013] Furthermore, the battery is a 6QW70HD model battery, the water pump switching switch is a JK932-006 model switching switch, the sprinkler enable switch is a JK932-002 model switching switch, the controller is a Wise4.0 controller, and both the main water pump and the standby water pump are R3B21-501A model water pumps.

[0014] Furthermore, the water-sprinkling energy-saving mode switch is a JK932-002 switching switch, and the speed sensor is a CEH-10 / 22 speed sensor.

[0015] Compared with the prior art, the advantages of this utility model are as follows: 1. This utility model realizes the automatic switching of two water pumps through a water pump switching switch and controller, which prevents a single water pump from working for a long time and damaging the water pump, and reduces the time for the driver to manually replace electrical connectors. At the same time, through the water spraying energy-saving mode switch, two modes can be selected: maximum displacement water spraying and energy-saving water spraying, which improves the effective utilization rate of water, reduces the number of times the driver needs to add water, and improves the overall construction quality.

[0016] 2. When this utility model is switched to energy-saving water spraying, it can combine water spraying with the speed of the steel wheel vehicle. The controller uses the vehicle speed sensor signal to determine the amount of water output from the water pump, so as to achieve uniformity and full coverage of water spraying on the steel wheel, and reduce or eliminate the problem of adhesion between the steel wheel and high temperature asphalt.

[0017] It is evident that this utility model has substantial features and progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is the circuit schematic diagram of this utility model.

[0020] In the accompanying drawings, the reference numerals indicate: 1. Battery; 2. Water pump switching switch; 3. Sprinkler enable switch; 4. Sprinkler energy-saving mode switch; 5. Controller; 6. Main water pump; 7. Standby water pump; 8. Speed ​​sensor. Detailed Implementation

[0021] The specific embodiments of this utility model will be described below with reference to the accompanying drawings.

[0022] like Figure 1 The automatic water pump switching system of a double drum roller shown includes a battery 1, a water pump switching switch 2, a water spraying enable switch 3, a controller 5, a main water pump 6, a standby water pump 7, a water spraying energy-saving mode switch 4, and a speed sensor 8.

[0023] The controller 5 is connected to the water pump switching switch 2, the sprinkler enable switch 3, the main water pump 6, the standby water pump 7, the sprinkler energy-saving mode switch 4, and the speed sensor 8. The battery 1 is connected to the water pump switching switch 2, the sprinkler enable switch 3, the controller 4, the main water pump 6, the standby water pump 7, the sprinkler energy-saving mode switch 4, and the speed sensor 8. The water pump switching switch 2 has three positions: main water pump switching position, standby water pump switching position, and automatic switching position. The speed sensor 8 is installed on the steel wheel of the double-drum roller and is used to send pulse signals to the controller 5. The sprinkler energy-saving mode switch 4 sends a sprinkler energy-saving signal to the controller 5 through its built-in contacts.

[0024] Among them, the storage battery 1 is a 6QW70HD battery, the water pump switching switch 2 is a JK932-006 switching switch, the sprinkler enable switch 3 is a JK932-002 switching switch, the controller 5 is a Wise4.0 controller, the main water pump 6 and the standby water pump 7 are both R3B21-501A water pumps, the sprinkler energy saving mode 4 switch is a JK932-002 switching switch, and the speed sensor 8 is a CEH-10 / 22 speed sensor.

[0025] Specifically, one pin of controller 5 is connected to the positive terminal of battery 1, the 1A contact of water pump switch 2, the 2A contact of sprinkler enable switch 3, and the 3A contact of sprinkler energy-saving mode switch 4; the second pin of controller 5 is connected to the negative terminal of battery 1, the first terminal of main water pump 6, the first terminal of standby water pump 7, and the first terminal of speed sensor 8; the third pin of controller 5 is connected to the 1B contact of water pump switch 2, the fourth pin of controller 5 is connected to the 1C contact of water pump switch 2, the fifth pin of controller 5 is connected to the 2B contact of sprinkler enable switch 3, and the sixth pin of controller 5 is connected to the 3B contact of sprinkler energy-saving mode switch 4; the seventh pin of controller 5 is connected to the second terminal of main water pump 6, the eighth pin of controller 5 is connected to the second terminal of standby water pump 7, and the ninth pin of controller 5 is connected to the second terminal of speed sensor 8.

[0026] Based on the above system architecture, the working process of this utility model is as follows: Before starting construction, fill the water tank, then start the double-drum roller. Operate the handle to move the roller forward or backward according to the construction requirements. When watering is needed, first select the 2A-2B contact on position on the water spraying enable switch 3. The water spraying enable signal will be input to the controller 5 to trigger the water spraying function and meet the watering requirements.

[0027] The water pump switching switch 2 has three positions: high, medium, and low. When the position is high, the main water pump 6 is working; when the position is low, the standby water pump 7 is working; when the position is medium, the controller 5 automatically switches between the two water pumps according to the set working time of a single water pump. For example, if a single water pump is allowed to work continuously for 30 minutes, it will automatically switch to another water pump after 30 minutes, and then switch back to the first water pump after another 30 minutes. This cycle repeats to prevent damage to the water pump caused by heat accumulation from prolonged operation of a single water pump.

[0028] In this system, the water pump operates in two modes: maximum displacement water spraying and energy-saving water spraying. The two modes are as follows: 1. Maximum displacement water spraying operation: When the sprinkler energy-saving mode switch 4 is selected to the 3A-3C contact conduction position, there is no sprinkler energy-saving signal input to the controller 5. At this time, the controller 5 does not collect the signal from the steel wheel speed sensor 8, and the signal output to the water pump is the maximum displacement sprinkler control signal. Regardless of whether the water pump switching switch 2 is in the upper, middle, or lower position (i.e., the main water pump 6 is always working, the standby water pump 7 is always working, or the main water pump 6 and the standby water pump 7 are intermittently switching), the water pump output is always the maximum displacement sprinkler.

[0029] 2. Energy-saving sprinkler operation status: When the water-sprinkling energy-saving mode switch 4 is selected to the 3A-3B contact conduction position, the water-sprinkling energy-saving signal is input to the controller 5. At this time, the controller 5 collects the signal from the steel wheel speed sensor 8 and outputs a water pump signal based on the speed of the steel wheel. Since both the front and rear steel wheels of the double steel wheel roller are equipped with speed sensors 8, the signals emitted by the speed sensors 8 are pulse signals. That is, for one rotation of the steel wheel, the speed sensor 8 emits 35 pulses. The controller 5 receives the pulse signals emitted by the speed sensors 8 and calculates the vehicle speed through its internal software program. The calculation method can adopt a well-known technique in the field: divide the number of pulses recorded by the speed sensor 8 per second by the number of pulses emitted for one rotation of the steel wheel. The result is the number of rotations of the steel wheel per second. Then multiply this value by the circumference of the steel wheel to get the number of meters the vehicle travels per second. Then convert this value (m / s) into vehicle speed (km / h) to obtain the actual vehicle speed. The controller 5 calculates the water spraying volume according to the built-in vehicle speed and water spraying volume curve. In actual operation, the controller outputs different voltage levels to the water pump based on the vehicle speed, essentially acting as a sliding rheostat to change the voltage across the pump, allowing it to operate at different voltage levels and thus controlling its speed, thereby achieving energy-saving water spraying. In energy-saving water spraying mode, whether the main water pump 6 is continuously operating, the standby water pump 7 is continuously operating, or the main water pump 6 and the standby water pump 7 are intermittently switching operation, the water pump outputs energy-saving mode.

[0030] As can be seen, this utility model enables free switching between multiple water spraying modes, which can meet the working conditions of the construction site.

[0031] In summary, this invention achieves automatic switching between two water pumps through a water pump switching switch and controller, preventing damage to the pump from prolonged operation of a single pump and reducing the time required for manual replacement of electrical connectors by the driver. Simultaneously, the energy-saving sprinkler mode switch allows selection of either maximum displacement sprinkler mode or energy-saving sprinkler mode. The energy-saving sprinkler mode combines sprinkler operation with the vehicle's wheel speed. The controller, based on the vehicle speed sensor signal, determines the water output from the pump, ensuring uniform and full coverage of the water sprayed onto the wheel, and reducing or eliminating the problem of adhesion between the wheel and high-temperature asphalt.

[0032] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

Claims

1. An automatic pump switching system for a double-drum roller, characterized in that, Includes a storage battery, a water pump switching switch, a sprinkler enable switch, a controller, a main water pump, and a standby water pump; The controller is connected to the water pump switching switch, the sprinkler enable switch, the main water pump and the standby water pump respectively, and the battery is connected to the water pump switching switch, the sprinkler enable switch, the controller, the main water pump and the standby water pump respectively. The water pump switching switch has three positions: main water pump switching position, standby water pump switching position, and automatic switching position.

2. The automatic pump switching system for a double-drum roller according to claim 1, characterized in that, It also includes a water spraying energy-saving mode switch and a speed sensor; The water-sprinkling energy-saving mode switch is connected to the controller and sends a water-sprinkling energy-saving signal to the controller through the built-in contacts to activate the setting. The speed sensor is installed on the steel drum of the double drum roller. The speed sensor is connected to the controller and sends pulse signals to the controller. The battery is connected to the sprinkler energy-saving mode switch and the speed sensor respectively.

3. The automatic pump switching system for a double-drum roller according to claim 2, characterized in that, One pin of the controller is connected to the positive terminal of the battery, the 1A contact of the water pump switch, and the 2A contact of the sprinkler enable switch, respectively; the second pin of the controller is connected to the negative terminal of the battery, the first terminal of the main water pump, and the first terminal of the standby water pump, respectively; the third pin of the controller is connected to the 1B contact of the water pump switch, the fourth pin of the controller is connected to the 1C contact of the water pump switch, and the fifth pin of the controller is connected to the 2B contact of the sprinkler enable switch; the seventh pin of the controller is connected to the second terminal of the main water pump, and the eighth pin of the controller is connected to the second terminal of the standby water pump.

4. The automatic pump switching system for a double-drum roller according to claim 3, characterized in that, The 3A contact of the water-sprinkling energy-saving mode switch is connected to the positive terminal of the battery, the 3B contact of the water-sprinkling energy-saving mode switch is connected to pin six of the controller, the first end of the speed sensor is connected to the negative terminal of the battery, and the second end of the speed sensor is connected to pin nine of the controller.

5. The automatic pump switching system for a double-drum roller according to claim 3, characterized in that, The controller is equipped with a timing chip for recording the continuous working time of the water pump.

6. The automatic pump switching system for a double-drum roller according to claim 5, characterized in that, The water-sprinkling energy-saving mode switch is configured with a first contact conduction position and a second contact conduction position; the first contact conduction position connects contact 3A and contact 3B, and inputs the water-sprinkling energy-saving signal to the controller.

7. The automatic pump switching system for a double-drum roller according to claim 1, characterized in that, The battery used is a 6QW70HD battery, the water pump switching switch is a JK932-006 switching switch, the sprinkler enable switch is a JK932-002 switching switch, the controller is a Wise4.0 controller, and both the main water pump and the standby water pump are R3B21-501A water pumps.

8. The automatic pump switching system for a double-drum roller according to claim 2, characterized in that, The water sprinkler energy-saving mode switch is a JK932-002 type switch, and the speed sensor is a CEH-10 / 22 type speed sensor.

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