Intelligent sweeping water supply device for coal preparation plant

Abstract

The utility model belongs to the field of slurry pumps for coal preparation plants, and particularly relates to an intelligent floor sweeping water supply device for a coal preparation plant, which comprises a water tank, a slurry pump system, a water supply pipeline, an energy storage device, a water branch line, a pressure transmitter, a PLC (programmable logic controller) and a frequency conversion control cabinet. One end of the slurry pump system is connected with the water supply pipeline, the other end of the slurry pump system is connected with the energy storage device through the water supply pipeline, the water supply pipeline is connected with the water branch lines, the pressure transmitter is installed on the energy storage device, the pressure transmitter is connected with the PLC, and the PLC is connected with the water supply pipeline. The slurry pump system and the PLC are both in communication connection with the frequency conversion control cabinet; according to the device, the loss of equipment such as a slurry pump can be reduced, the waste of water resources is reduced, water supply is more timely through an automatic control mode, and the hysteresis is reduced.

Description

Technical Field

[0001] The utility model relates to the field of slurry pumps for coal preparation plants, in particular to an intelligent sweeping and water supply device for coal preparation plants. Background Art

[0002] In a coal preparation plant, the sweeping slurry pump is mainly used for sweeping water supply on each floor of the coal preparation plant. In the prior art, due to the uncertainty of water use time and water consumption on each floor, the slurry pump always has to maintain a relatively high pressure. When the water consumption is reduced to a stop, the slurry pump is shut down at the maximum pressure, which not only wastes energy, but also heats the pipes and easily causes equipment damage. Since the sweeping water contains solid particle impurities, the existing civilian constant pressure water supply system is easily damaged in coal preparation plant practice. In the existing practice, most of the central control room is notified by a loudspeaker or the pump is stopped or started manually, which has serious lag, resulting in waste or insufficient water supply when water is needed.

[0003] In view of the above-mentioned problems, an intelligent sweeping and water supply device for a coal preparation plant is designed specifically. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems and specifically designs an intelligent sweeping and water supply device for a coal preparation plant. The device can reduce the loss of equipment such as slurry pumps, reduce the waste of water resources, and make water supply more timely and reduce lag through automatic control.

[0005] To achieve the above-mentioned purpose, the utility model provides an intelligent sweeping and water supply device for a coal preparation plant, comprising: a water tank, a slurry pump system, a water supply pipeline, an energy storage device, a water branch line, a pressure transmitter, a PLC controller and a frequency conversion control cabinet, one end of the slurry pump system is connected to the water tank, and the other end of the slurry pump system is connected to the energy storage device through the water supply pipeline, a plurality of water branch lines are connected to the water supply pipeline, the energy storage device is installed with the pressure transmitter, the pressure transmitter is connected to the PLC controller, and the slurry pump system and the PLC controller are both communicatively connected to the frequency conversion control cabinet.

[0006] In the above manner, the slurry pump system transports water to the water branches on each floor through the water supply pipeline. The accumulator is responsible for storing water and providing water supply pressure. The PLC system transmits data to the frequency conversion control cabinet through the pressure parameters returned by the pressure transmitter, and the control cabinet controls the start and stop frequency of the pump.

[0007] Furthermore, the slurry pump system includes a main slurry pump and an auxiliary slurry pump, the main slurry pump and the auxiliary slurry pump are both connected to the water tank, the auxiliary slurry pump and the main slurry pump are both connected to the water supply pipeline, and the main slurry pump and the auxiliary slurry pump are both connected to the frequency conversion control cabinet. When the water pressure on a floor is small, the energy storage device cooperates with the auxiliary slurry pump to supply water to each floor. When the water consumption on each floor increases, the pressure of the auxiliary slurry pump is insufficient, and the pressure in the energy storage device decreases, the main slurry pump starts to increase the water pressure in the pipeline.

[0008] Furthermore, a filter is also included, and the filter is installed between the energy storage device and the water supply pipeline. The filter can prevent impurities from entering the energy storage device and avoid damage to the energy storage device.

[0009] Furthermore, it also includes a one-way valve, which is respectively installed at the connection point between the main slurry pump and the auxiliary slurry pump and the water supply pipeline.

[0010] Furthermore, the energy storage device includes an air charging port and an automatic air releasing valve, wherein the air charging port is arranged on the side of the energy storage device, and the automatic air releasing valve is arranged on the top of the energy storage device.

[0011] Furthermore, the energy storage device adopts a bladder accumulator.

[0012] In summary, the utility model has the following advantages and beneficial technical effects:

[0013] 1. The utility model is an intelligent sweeping water supply device for a coal preparation plant. Two slurry pumps with one large power and one small power cooperate with an energy storage device to supply water to the pipeline, thereby avoiding damage to the slurry pump caused by a large pressure change in the system and saving water resources at the same time.

[0014] 2. The utility model discloses an energy storage device for an intelligent sweeping water supply device for a coal preparation plant, which can store a portion of water. When there is a low-pressure water supply demand, the water inside the energy storage device can be used to supply water to the system first, thereby reducing the lag of the water supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram of a leak-proof maintenance device for drinking water pipes of the utility model;

[0017] Figure 2 The utility model Figure 1 A magnified view of middle;

[0018] Figure 3 The utility model Figure 1 The square picture of B in the middle;

[0019] Figure 4 It is a schematic diagram of the operating principle of the device of the utility model when the water consumption of each floor gradually increases;

[0020] Figure 5 It is a schematic diagram of the operating principle of the device of the utility model when the water consumption of each floor is gradually reduced.

[0021] The reference numerals in the accompanying drawings are:

[0022] 1-water tank; 2-slurry pump system; 21-main slurry pump; 22-auxiliary slurry pump;

[0023] 3-water supply pipeline; 4-energy storage device; 5-water branch line; 6-pressure transmitter; 7-PLC controller;

[0024] 8- frequency conversion control cabinet; 9- charging port; 10- filter; 11- one-way valve; 12- automatic air release valve. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-Figure 5 The utility model is further described in detail, and examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and should not be construed as limiting the utility model.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", etc., and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning. The parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0028] like Figure 1 As shown, it includes: a water tank 1, a slurry pump system 2, a water supply pipeline 3, an energy storage device 4, a water branch line 5, a pressure transmitter 6, a PLC controller 7 and a frequency conversion control cabinet 8. One end of the slurry pump system 2 is connected to the water tank 1 through a pipeline, and the other end of the slurry pump system 2 is connected to the bottom of the energy storage device 4 through the water supply pipeline 3. A plurality of water branch lines 5 are connected to the water supply pipeline 3, and the water branch lines 5 lead to each water-using floor. A pressure transmitter 6 is installed on the energy storage device 4, and the pressure transmitter 6 is communicatively connected to the PLC controller 7. The slurry pump system 2 and the PLC controller 7 are both communicatively connected to the frequency conversion control cabinet 8.

[0029] like Figure 1 As shown, the slurry pump system 2 includes a main slurry pump 21 and an auxiliary slurry pump 22. The main slurry pump 21 and the auxiliary slurry pump 22 are both connected to the water tank 1 through pipelines, the auxiliary slurry pump 22 and the main slurry pump 21 are both connected to the water supply pipeline 3, and the main slurry pump 21 and the auxiliary slurry pump 22 are both communicatively connected to the frequency conversion control cabinet 8.

[0030] like Figure 1 and Figure 3 As shown, a filter 10 is also included, and the filter 10 is installed between the energy storage device 4 and the water supply pipeline 3. The filter 10 is a Y-type filter.

[0031] like Figure 1 and Figure 2 As shown, it also includes a one-way valve 11, which is installed at the connection points between the main slurry pump 21 and the auxiliary slurry pump 22 and the water supply pipeline 3.

[0032] like Figure 1 and Figure 3 As shown, the energy storage device 4 includes a charging port 9 and an automatic air release valve 12. The charging port 9 is fixedly installed on the side of the energy storage device 4, and gas can be filled into the interior of the energy storage device 4 through the charging port 9. The automatic air release valve 12 is installed on the top of the energy storage device 4, and the automatic air release valve 12 can balance the pressure. The energy storage device 4 adopts a bladder accumulator.

[0033] The working principle of the intelligent sweeping and water supply device for coal preparation plant of the utility model is:

[0034] like Figure 4 and Figure 5 As shown, firstly, gas is injected into the energy storage device 4 through the charging port 9 to make the pressure reach P0, and the auxiliary slurry pump 22 is turned on during the non-water use time, and water is injected into the energy storage device 4 through the water supply main 3 to increase the pressure. When the pressure in the energy storage device 4 reaches P1, the pressure transmitter 6 transmits the signal to the PLC controller 7, and the PLC controller 7 transmits the signal to the frequency conversion control cabinet 8, and the frequency conversion control cabinet 8 controls the auxiliary slurry pump 22 to stop. P1 is the rated pressure of the water supply system; when the water supply branch line 5 of each floor starts to supply water, the water in the energy storage device 4 starts to be discharged, and the pressure in the energy storage device 4 gradually decreases. When the pressure drops to P2 , the auxiliary slurry pump 22 is turned on to supply water to the water supply pipeline 3 and replenish the pressure of the energy storage device 4; when the water consumption of each floor continues to increase and the auxiliary slurry pump 22 is insufficient to replenish the required water, the pressure of the energy storage device 4 drops to P3, at which time the main slurry pump 21 is started and the auxiliary slurry pump 22 is stopped; when the water consumption decreases, the pressure in the energy storage device 4 gradually rises to P2, the main slurry pump 21 is stopped, and the auxiliary slurry pump 22 is turned on to continue to replenish the pressure of the energy storage device 4. When the pressure reaches P1, the frequency conversion control 8 is set to delay for five minutes when reaching P1, and then the water supply branches 5 stop using water by default, and the auxiliary slurry pump 22 stops working.

[0035] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An intelligent sweeping and water supply device for a coal preparation plant, characterized in that: include: A water tank (1), a slurry pump system (2), a water supply pipeline (3), an energy storage device (4), a water branch line (5), a pressure transmitter (6), a PLC controller (7) and a frequency conversion control cabinet (8), wherein one end of the slurry pump system (2) is connected to the water tank (1), and the other end of the slurry pump system (2) is connected to the energy storage device (4) via the water supply pipeline (3), a plurality of water branch lines (5) are connected to the water supply pipeline (3), the energy storage device (4) is installed with the pressure transmitter (6), the pressure transmitter (6) is connected to the PLC controller (7), and the slurry pump system (2) and the PLC controller (7) are both communicatively connected to the frequency conversion control cabinet (8).

2. The intelligent sweeping and water supply device for a coal preparation plant according to claim 1 is characterized in that: The slurry pump system (2) comprises a main slurry pump (21) and an auxiliary slurry pump (22); the main slurry pump (21) and the auxiliary slurry pump (22) are both connected to the water tank (1); the auxiliary slurry pump (22) and the main slurry pump (21) are both connected to the water supply pipeline (3); and the main slurry pump (21) and the auxiliary slurry pump (22) are both connected to the frequency conversion control cabinet (8).

3. The intelligent sweeping and water supply device for a coal preparation plant according to claim 1 is characterized in that: It also includes a filter (10), which is installed between the energy storage device (4) and the water supply pipeline (3).

4. The intelligent sweeping and water supply device for a coal preparation plant according to claim 2 is characterized in that: It also comprises a one-way valve (11), wherein the one-way valve (11) is respectively installed at the connection points between the main slurry pump (21) and the auxiliary slurry pump (22) and the water supply pipeline (3).

5. The intelligent sweeping and water supply device for a coal preparation plant according to claim 1, characterized in that: The energy storage device (4) comprises an air charging port (9) and an automatic air releasing valve (12); the air charging port (9) is arranged on a side of the energy storage device (4), and the automatic air releasing valve (12) is arranged on a top of the energy storage device (4).

6. The intelligent sweeping and water supply device for a coal preparation plant according to claim 1, characterized in that: The energy storage device (4) adopts a bladder accumulator.

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