Automatic control device of coal mine bathing hot water tank

Abstract

The utility model discloses a coal mine bathing hot water tank automatic control device which comprises a bathing hot water tank, a glass tube liquid level meter is connected to the bathing hot water tank, a cold water inlet pipeline, a steam pipeline and a hot water supply pipeline are connected to the bathing hot water tank, and a plurality of non-contact sensors are arranged on the surface of the glass tube liquid level meter. According to the utility model, the non-contact sensor is arranged on the glass tube liquid level meter to monitor and sense the liquid level and input signals to the control box, the signals are output to the corresponding electric telescopic butterfly valves after being judged by a PLC (Programmable Logic Controller) in the control box, and the electric telescopic butterfly valves are respectively arranged on the cold water inlet pipeline, the steam pipeline and the hot water supply pipeline. The whole process of preparation and water supply of bathing hot water in the water tank is achieved by automatically controlling opening and closing of the electric telescopic butterfly valves. Opening and closing of the electric telescopic butterfly valve are controlled in a one-to-one correspondence mode through the liquid level positions calibrated on the glass tube liquid level meter, unnecessary steam and water waste caused by manual observation errors is avoided, and on-site on-duty workers are omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine water supply, in particular to an automatic control device for a coal mine bath hot water tank. Background Technique

[0002] The coal mine combined building (a multi-functional building that integrates task briefing, receiving and returning self-rescue devices and headlamps, and bathing) is a unique production and office unit in coal mines. Coal miners must take baths in the combined building after ascending the shaft, and bathing is an important task undertaken by the combined building. It is a common practice to set up a bath hot water tank in the combined building; in northern coal mines, due to the relatively cold climate in winter, steam direct heating is usually used to efficiently and quickly prepare bath hot water. For example: the normal operation is to first fill cold water into the shower hot water tank (assuming the water tank is 2.5 meters high, the cold water temperature is 5°C, and the cold water needs to be heated to 42°C, then first fill cold water to a water level of 2.1 meters, and then introduce steam for heating. According to the steam parameters of 0.30 Mpa and a designed steam consumption of 3.0 t, observe the water level rising to 2.4 meters; in this way, 42°C hot water is prepared and can be supplied to the shower system; when the water level in the shower hot water tank drops to 0.2 meters, stop the water supply and enter the next cycle of filling cold water, introducing steam, and supplying hot water.

[0003] Field research found that the hot water in the bath water tank needs to be prepared two to four times a day. The water level observation and calibration for preparing hot water are usually manually observing the liquid level gauge of the glass tube outside the water tank and constantly reading the thermometer numbers for operation. After long-term operation, the glass tube liquid level gauge will become blurred due to internal scaling and external corrosion, making the liquid level unclear. In fact, the cold water filling liquid level needs to be changed about once a quarter. If the correct liquid level is not adjusted in time, unnecessary waste will be caused.

[0004] Therefore, an automatic control device for a coal mine bath hot water tank is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an automatic control device for a coal mine bath hot water tank to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, the utility model provides the following technical solution: an automatic control device for a coal mine bath hot water tank, including a bath hot water tank, a glass tube liquid level gauge is connected to the bath hot water tank, the bath hot water tank is connected with a cold water inlet pipe, a steam inlet pipe and a hot water supply pipe, several non-contact sensors are arranged on the surface of the glass tube liquid level gauge, electric telescopic butterfly valves are respectively arranged on the cold water inlet pipe, the steam inlet pipe and the hot water supply pipe, and the electric telescopic butterfly valves are connected with a control box, and the control box is used to control the electric telescopic butterfly valves according to the electrical signals transmitted by the non-contact sensors.

[0007] According to the above technical solution, the number of non-contact sensors is three, and the three non-contact sensors are respectively arranged at the lowest water level, the highest water level and the steam filling water level of the glass tube liquid level gauge.

[0008] According to the above technical solution, the non-contact sensor is fixed to the glass tube liquid level gauge through a guide rail. The guide rail is in a plate-like structure and extends in the same direction as the length direction of the glass tube liquid level gauge. A movable block is movably arranged on the surface of the guide rail, and the non-contact sensor is embedded inside the movable block.

[0009] According to the above technical solution, sliding grooves extending in the same direction are arranged on both side surfaces of the guide rail. A slider is arranged on the surface of the movable block corresponding to one of the sliding grooves, a rack is arranged inside the other sliding groove, and a gear meshing with the rack is rotatably arranged on the movable block.

[0010] According to the above technical solution, the gear is coaxially connected with a worm gear, a worm meshing with the worm gear is rotatably arranged inside the movable block, and a knob coaxially connected with the worm is arranged on the outer surface of the movable block.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: Electric telescopic butterfly valves are respectively arranged on the cold water inlet pipe, the steam pipe and the hot water supply pipe connected to the bathing hot water tank. By arranging non-contact sensors on the glass tube liquid level gauge to monitor and sense the liquid level and input signals to the control box, after being judged by the PLC in the control box, signals are output to the corresponding electric telescopic butterfly valves, and the opening and closing of each electric telescopic butterfly valve are automatically controlled to realize the whole process of preparing and supplying bathing hot water in the water tank. The present utility model controls the opening and closing of the electric telescopic butterfly valves one by one corresponding to the liquid level positions calibrated on the glass tube liquid level gauge, and the control is more accurate, avoiding unnecessary steam and water waste caused by human observation errors, and saving on-site duty workers. Description of the Drawings

[0012] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0013] Figure 1 is the front view structural schematic diagram of the glass tube liquid level gauge of the present utility model;

[0014] Figure 2 is the structural schematic diagram of the present utility model;

[0015] Figure 3 is the structural schematic diagram of the guide rail of the present utility model;

[0016] Figure 4 is the front view sectional structural schematic diagram of the guide rail of the present utility model;

[0017] Figure 5 It is a left - view sectional structure schematic diagram of the guide rail of the present utility model;

[0018] Figure 6 It is a top - view sectional structure schematic diagram of the guide rail of the present utility model;

[0019] In the figure: 1 - Bathing hot - water tank, 2 - Glass - tube liquid level gauge, 3 - Non - contact sensor, 4 - Electric telescopic butterfly valve, 5 - Control box, 6 - Guide rail, 7 - Movable block, 8 - Chute, 9 - Slide block, 10 - Rack, 11 - Gear, 12 - Worm gear, 13 - Worm, 14 - Knob. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figure 1-6 , the present utility model provides a technical solution: An automatic control device for a coal - mine bathing hot - water tank, including a bathing hot - water tank 1. A glass - tube liquid level gauge 2 is connected to the bathing hot - water tank 1. The bathing hot - water tank 1 is connected with a cold - water inlet pipeline, a steam - passing pipeline, and a hot - water supply pipeline. A number of non - contact sensors 3 are arranged on the surface of the glass - tube liquid level gauge 2. Electric telescopic butterfly valves 4 are respectively arranged on the cold - water inlet pipeline, the steam - passing pipeline, and the hot - water supply pipeline. The electric telescopic butterfly valve 4 is connected with a control box 5. The control box 5 receives the electrical signals transmitted by the non - contact sensors 3 and outputs electrical signals to control the electric telescopic butterfly valves 4. The non - contact sensors 3 can be calibrated at different positions according to different seasons and inlet water temperatures. When the water level in the glass - tube liquid level gauge 2 reaches the calibrated position of the non - contact liquid - level sensor 3, the non - contact sensor 3 emits an electrical signal. After receiving the electrical signal, the control box 5 issues an instruction to the corresponding electric telescopic butterfly valve 4 according to the pre - set program to realize the automatic preparation of hot water in the bathing hot - water tank 1 and timely supply of hot water;

[0022] The bathing hot - water tank 1 is an existing facility on - site. Usually, it is an enamel - lined water tank or a stainless - steel water tank; there must be a heat - insulation layer outside the hot - water tank to prevent the hot - water temperature in the tank from decreasing due to heat transfer to the surrounding area. Since there is a heat - insulation layer on the outer wall of the water tank and the liquid level in the water tank fluctuates, the non - contact sensor 3 is not arranged on the outer wall of the water tank, but on the outer wall of the glass - tube liquid level gauge 2 with a thin wall and a non - fluctuating liquid level. The glass - tube liquid level gauge 2 is an inherent accessory of the shower hot - water tank and is also an existing device. The present utility model installs a non - contact liquid - level sensor 3 on the glass - tube liquid level gauge 2 for liquid - level measurement and transmits the signal to the control box 5.

[0023] There are mature products for the non-contact liquid level sensor 3, and products with high cost performance can be selected according to accuracy and allowable temperature. The non-contact liquid level sensor 3 detects the presence of liquid by using the inductive capacitance of water. When there is no liquid approaching the sensor, due to the distributed capacitance on the sensor, there is a certain static capacitance between the sensor and the ground. When the liquid level slowly rises and approaches the sensor position, the parasitic capacitance of the liquid level will be coupled to this static capacitance, causing the final capacitance value of the sensor to increase. The changed capacitance difference is converted into an electrical signal through signal conversion, and then the liquid level value can be determined to reach the set liquid level point. The non-contact liquid level sensor 3 is supplied with a 24V voltage power supply by the control box 5.

[0024] The electric telescopic butterfly valve 4 is a national standard product and can be directly purchased on the market. The reason for using the electric telescopic butterfly valve is that it can achieve quick opening and closing, with no delay in execution, and can achieve accurate opening and closing. In addition, the electric telescopic butterfly valve has a smaller installation size than the corresponding gate valve, and the electric telescopic butterfly valve can be stretched and compressed according to the actual size on site, so its adaptability is very strong and it can meet the requirements of on-site rapid modification. The electric telescopic valve is powered by DC24V, and the valve body is equipped with an electric actuator, which has local and remote control, and transmits the valve state and remote signal to the PLC in the control box 5 to meet the PLC control requirements.

[0025] The control box 5 is a non-standard product and can be customized or assembled by oneself. In the control box 5 of the present utility model, there is a power distribution system, which is responsible for supplying power to the non-contact liquid level sensor 3 and the electric telescopic butterfly valve 4; and completing signal acquisition and control of each device. The control box 5 is equipped with a PLC host, an I / O module, and a power supply. The PLC controls each calibrated liquid level and the corresponding electric valve point-to-point.

[0026] The power supply in the control box 5 is responsible for stepping down the 220V alternating current through the transformer coil, rectifying it into pulsating direct current through the rectifier bridge, and then filtering it with a capacitor to become a stable and safe DC 24V voltage. The indoor environment of the water tank room is humid, and using DC 24V safety voltage can ensure environmental safety.

[0027] Specifically, the number of non-contact sensors 3 is three, and the three non-contact sensors 3 are respectively arranged at the lowest water level, the highest water level, and the steam filling water level of the glass tube liquid level gauge 2;

[0028] Specifically, the non-contact sensor 3 is fixed to the glass tube level gauge 2 through the guide rail 6. The guide rail 6 is in a plate-like structure and extends in the same direction as the length direction of the glass tube level gauge 2. Three movable blocks 7 are provided on the surface of the guide rail 6, and the non-contact sensor 3 is embedded inside the movable block 7. The movable block 7 can slide along the guide rail 6. During installation, the guide rail 6 can be first fixed on the glass tube level gauge 2, and then by controlling the sliding of the three movable blocks 7, the heights of the three non-contact sensors 3 can be adjusted. As Figure 3 shown, the surface of the guide rail 6 is in an arc shape that fits the glass tube level gauge 2, and a strip-shaped through groove extending in the same direction is provided through the end surface of the guide rail 6 for the non-contact sensor 3 to pass through the strip-shaped through groove to monitor the glass tube level gauge 2;

[0029] Specifically, sliding grooves 8 extending in the same direction are provided on both side surfaces of the guide rail 6. Sliders 9 are provided on the surface of the movable block 7 corresponding to one side of the sliding groove 8, a rack 10 is provided inside the other sliding groove 8, and a gear 11 meshing with the rack 10 is rotatably provided on the movable block 7. By controlling the rotation of the gear 11, the height of the movable block 7 can be accurately adjusted under the action of the rack 10;

[0030] Specifically, the gear 11 is coaxially connected with a worm gear 12, a worm 13 meshing with the worm gear 12 is rotatably provided inside the movable block 7, and a knob 14 coaxially connected with the worm 13 is provided on the outer surface of the movable block 7. By rotating the knob 14, the worm 13 is driven to rotate, and the worm 13 drives the gear 11 to rotate through the worm gear 12. Under the action of the gear 11 and the rack 10, the height of the movable block 7 can be flexibly adjusted to achieve high-precision positioning;

[0031] When the present utility model is in use, when the water level drops to the lowest water level, the non-contact liquid level sensor 3 emits a low liquid level electrical signal. The PLC receives the electrical signal, and after judgment and determination, it issues an instruction to quickly close the electric telescopic butterfly valve 4 on the hot water supply pipe of the bathing hot water tank 1. After a two-minute delay, the PLC issues an instruction to control the opening of the electric telescopic butterfly valve 4 on the cold water inlet pipe of the bathing hot water tank 1; when the liquid level in the water tank rises to the highest water level for filling cold water, the non-contact sensor 3 emits an electrical signal. The PLC receives the electrical signal, and after judgment and determination, it issues an instruction to close the electric telescopic butterfly valve 4 on the cold water inlet pipe. After a two-minute delay, the PLC issues an instruction to open the electric telescopic butterfly valve 4 on the steam supply pipe to inject steam into the bathing hot water tank 1. The steam is fully mixed with the cold water through the steam-water silencing heater, and the heated cold water rises upward; at the same time, the injected steam releases heat and turns into condensate, which liquefies into the water tank together. When enough steam turns into enough condensate and heats the cold water in the water tank to the required temperature, at this time the liquid level rises to the highest liquid level, that is, the stop steam liquid level. After the non-contact liquid level sensor 3 detects this liquid level, it emits an electrical signal. The PLC receives the electrical signal, and after judgment and determination, it issues an instruction to quickly close the electric telescopic butterfly valve 4 on the steam supply pipe. After a two-minute delay, the PLC issues an instruction to open the electric telescopic butterfly valve 4 on the hot water supply pipe to provide qualified shower hot water.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic control device for a coal mine hot water tank for bathing, comprising a hot water tank for bathing (1), characterized in that: The bathing hot water tank (1) is connected to a glass tube level gauge (2), and the bathing hot water tank (1) is connected to a cold water inlet pipe, a steam pipe, and a hot water supply pipe. A plurality of non-contact sensors (3) are provided on the surface of the glass tube level gauge (2). The cold water inlet pipe, the steam pipe, and the hot water supply pipe are respectively provided with electric telescopic butterfly valves (4). The electric telescopic butterfly valve (4) is connected to a control box (5). The control box (5) is used to control the electric telescopic butterfly valve (4) according to an electrical signal transmitted by the non-contact sensor (3).

2. The automatic control device for a coal mine bathing hot water tank according to claim 1, characterized in that: There are three non-contact sensors (3), which are respectively arranged at the lowest water level, the highest water level and the steam filling water level of the glass tube liquid level gauge (2).

3. The automatic control device for a coal mine bathing hot water tank according to claim 2, characterized in that: The non-contact sensor (3) is fixed to the glass tube liquid level gauge (2) via a guide rail (6); the guide rail (6) is a plate-shaped structure and is extended in the same direction as the length direction of the glass tube liquid level gauge (2); a movable block (7) is movably provided on the surface of the guide rail (6); and the non-contact sensor (3) is embedded in the interior of the movable block (7).

4. The automatic control device for a coal mine bathing hot water tank according to claim 3, characterized in that: The surfaces of both sides of the guide rail (6) are provided with slide grooves (8) extending in the same direction, a sliding block (9) is provided on the surface of the movable block (7) at a position corresponding to the slide groove (8) on one side, a rack (10) is provided inside the slide groove (8) on the other side, and a gear (11) meshing with the rack (10) is rotatably provided on the movable block (7).

5. The automatic control device for a coal mine bathing hot water tank according to claim 4, characterized in that: The gear (11) is coaxially connected to a worm wheel (12); a worm (13) meshing with the worm wheel (12) is provided inside the movable block (7); and a knob (14) coaxially connected to the worm wheel (13) is provided on the outer surface of the movable block (7).

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