Quantitative proportioning device for feed liquid

Abstract

The utility model discloses a material liquid quantitative proportioning device. The material liquid quantitative proportioning device comprises a material liquid box, a material liquid storage tank and a material liquid proportioning device, wherein the material liquid box is used for storing material liquid; a proportioning channel is defined in the proportioning pipeline, the proportioning pipeline is provided with a pipeline inlet, a pipeline outlet and a feed liquid adding port, the pipeline inlet, the pipeline outlet and the feed liquid adding port are all communicated with the proportioning channel, and the feed liquid adding port is located between the pipeline inlet and the pipeline outlet; the metering pump is provided with a feed port and a discharge port, the feed port is communicated with the feed liquid tank, and the discharge port is communicated with the feed liquid adding port; the flow meter is arranged between the pipeline inlet and the feed liquid adding opening; and the metering pump and the flow meter are both electrically connected with the control device. The material liquid quantitative proportioning device disclosed by the utility model is high in proportioning precision and high in automation degree.

Description

Technical Field

[0001] The utility model relates to the technical field of mining equipment, in particular to a device for quantitatively proportioning liquid materials. Background Art

[0002] In recent years, with the significant improvement of the mechanization level of coal mine production, the production scale of coal mines has been continuously expanding. While the coal output and efficiency have been significantly improved, the problem of a large amount of dust generated during mechanized production has become a key threat to the safety of underground operation production and the life and health of workers. In order to improve the underground operation environment and ensure the safety of coal mine production, most coal mines will adopt different dust removal and ventilation measures and a series of dust suppression means according to the actual situation to control dust, which mainly include ventilation dust removal, spray dust suppression, chemical dust removal, foam dust removal, pre-wetting of coal bodies, and personal protection, etc.

[0003] Among them, chemical dust removal technology is developed on the basis of spray dust suppression. It adds a dust suppressant with surface active substances to the water for spraying to improve the hydrophilicity and wetting degree of dust particles and achieve a better dust suppression effect. When using chemical dust removal technology for dust suppression, a device for quantitatively proportioning liquid materials is usually used to quantitatively proportion the liquid material (dust suppressant) and water. The device for quantitatively proportioning liquid materials in the related technology has problems of low proportioning accuracy and low automation degree. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a device for quantitatively proportioning liquid materials, which has high proportioning accuracy and high automation degree.

[0005] The device for quantitatively proportioning liquid materials according to an embodiment of the utility model includes: a liquid material tank for storing liquid materials; a proportioning pipeline, a proportioning channel is defined in the proportioning pipeline, the proportioning pipeline has a pipeline inlet, a pipeline outlet and a liquid material adding port, the pipeline inlet, the pipeline outlet and the liquid material adding port are all communicated with the proportioning channel, and the liquid material adding port is located between the pipeline inlet and the pipeline outlet; a metering pump, the metering pump has a feed port and a discharge port, the feed port is communicated with the liquid material tank, and the discharge port is communicated with the liquid material adding port; a flowmeter, the flowmeter is arranged between the pipeline inlet and the liquid material adding port; a control device, both the metering pump and the flowmeter are electrically connected to the control device.

[0006] According to the liquid material quantitative ratio device of the embodiment of the present utility model, by arranging a flow meter between the pipeline inlet and the liquid material adding port, and simultaneously arranging a metering pump between the liquid material tank and the liquid material adding port, and both the flow meter and the metering pump are electrically connected to the control device. Thus, the control device can control the flow rate of the liquid material conveyed by the metering pump into the ratio channel according to the flow signal of the water detected by the flow meter and conveyed into the ratio channel, so that the flow rate of the water and the flow rate of the liquid material conveyed into the ratio channel can meet the set ratio requirements, thereby realizing the automatic quantitative ratio between the water and the liquid material, and having a high ratio accuracy. In addition, when the flow meter detects a change in the water flow rate conveyed into the ratio channel, the control device controls the metering pump to automatically adjust the flow rate of the liquid material conveyed into the ratio channel according to the flow signal detected by the flow meter, without manual adjustment of the dosage of the added liquid material, and has a high degree of automation.

[0007] In addition, the liquid material quantitative ratio device according to the embodiment of the present utility model may further have the following additional technical features:

[0008] According to an embodiment of the present utility model, the liquid material quantitative ratio device further includes a pressure transmitter, the pressure transmitter is arranged between the pipeline inlet and the flow meter, or the pressure transmitter is arranged between the flow meter and the liquid material adding port, and the pressure transmitter is electrically connected to the control device.

[0009] According to an embodiment of the present utility model, the liquid material quantitative ratio device further includes a flow stabilizing device, the flow stabilizing device has a flow stabilizing inlet and a flow stabilizing outlet, the flow stabilizing inlet is communicated with the discharge port, and the flow stabilizing outlet is communicated with the liquid material adding port.

[0010] According to an embodiment of the present utility model, the liquid material quantitative ratio device further includes a pressure relief valve, the pressure relief valve has a pressure relief inlet and a pressure relief outlet, the pressure relief inlet is communicated with the pipeline between the discharge port and the liquid material adding port, and the pressure relief outlet is communicated with the liquid material tank or the feed port.

[0011] According to an embodiment of the present utility model, the liquid material quantitative ratio device further includes a pressure sensor, the pressure sensor is arranged between the discharge port and the liquid material adding port, and is used for monitoring the pressure of the liquid material in the pipeline between the discharge port and the liquid material adding port, the pressure sensor is electrically connected to the control device, and the control device is also electrically connected to an alarm device, and the control device controls the alarm device to give an alarm according to the pressure signal fed back by the pressure sensor.

[0012] According to an embodiment of the present utility model, the liquid material quantitative proportioning device further includes a flow stabilizing device, a pressure relief valve, a pressure sensor, and a four-way structure. The flow stabilizing device has a flow stabilizing inlet and a flow stabilizing outlet. The flow stabilizing inlet is communicated with the discharge port. The pressure relief valve has a pressure relief inlet and a pressure relief outlet. The pressure relief outlet is communicated with the liquid material tank or the feed port. The pressure sensor is electrically connected to the control device. The control device is also electrically connected to an alarm device. The control device controls the alarm device to give an alarm according to the pressure signal fed back by the pressure sensor. The four-way structure has a first port, a second port, a third port, and a fourth port. The first port is communicated with the flow stabilizing outlet. The second port is communicated with the liquid material adding port. The third port is communicated with the pressure relief inlet. The fourth port is connected to the pressure sensor.

[0013] According to an embodiment of the present utility model, the liquid material quantitative proportioning device further includes a three-way structure. The three-way structure has a fifth port, a sixth port, and a seventh port. The fifth port is communicated with the pressure relief outlet. The sixth port is communicated with the liquid material tank. The seventh port is communicated with the feed port.

[0014] According to an embodiment of the present utility model, a liquid level sensor for detecting the liquid level of the liquid material in the liquid material tank is provided in the liquid material tank. The liquid level sensor is electrically connected to the control device.

[0015] According to an embodiment of the present utility model, the liquid material quantitative proportioning device further includes a box body. The liquid material tank, the proportioning pipeline, the metering pump, the flow meter, and the control device are all accommodated in the box body. A first avoidance port and a second avoidance port are provided on the side wall of the box body. The pipeline inlet is embedded in the first avoidance port. The pipeline outlet is embedded in the second avoidance port.

[0016] According to an embodiment of the present utility model, the flow stabilizing device includes: a flow stabilizing tank, a gas buffer cavity is defined in the flow stabilizing tank; a flow stabilizing pipeline, the flow stabilizing inlet and the flow stabilizing outlet are formed at both ends of the flow stabilizing pipeline. The flow stabilizing pipeline is also provided with a flow stabilizing adjustment port. The flow stabilizing adjustment port is located between the flow stabilizing inlet and the flow stabilizing outlet and is communicated with the gas buffer cavity.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 It is the front view of the liquid quantitative proportioning device according to the embodiment of the present utility model;

[0020] Figure 2 It is the top view of the liquid quantitative proportioning device according to the embodiment of the present utility model.

[0021] Reference numerals:

[0022] Liquid quantitative proportioning device 100; liquid tank 10; discharging port 11; lid 12; proportioning pipeline 20; pipeline inlet 21; pipeline outlet 22; liquid adding port 23; metering pump 30; feeding port 31; discharging port 32; flowmeter 41; control device 42; pressure transmitter 43; pressure sensor 44; flow stabilizing device 50; flow stabilizing tank 51; flow stabilizing pipeline 52; flow stabilizing inlet 521; flow stabilizing outlet 522; flow stabilizing adjustment port 523; pressure relief valve 60; pressure relief inlet 61; pressure relief outlet 62; four-way structure 70; three-way structure 80; fifth port 81; sixth port 82; seventh port 83; box body 90; first avoidance port 91; second avoidance port 92. Detailed implementation manners

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0024] Below, refer to Figure 1 - Figure 2 Describe the liquid quantitative proportioning device 100 according to the embodiment of the present utility model.

[0025] It should be noted that the disclosed liquid quantitative proportioning device 100 in the present application can be used for quantitative proportioning between any two liquids. In the following description of the present application, taking the liquid as a dust suppressant and the liquid quantitative proportioning device 100 being used for the quantitative proportioning between water and the dust suppressant in the dust suppression operation in a mine as an example for exemplary illustration, but it can be understood that the present application is not limited thereto. In some other application scenarios, for example, in the field of agricultural technology, the liquid can also be an insecticide or a herbicide, etc., that is, the liquid quantitative proportioning device 100 can also be used for the quantitative proportioning between an insecticide or a herbicide and water. Of course, the liquid quantitative proportioning device 100 is not only limited to the mixing between the liquid and the medium water, but can also be used for the mixing between the liquid and other liquid media (such as brine, etc.).

[0026] Refer to Figure 1 - Figure 2 As shown, the liquid quantitative proportioning device 100 according to the embodiment of the present utility model includes: a liquid tank 10, a proportioning pipeline 20, a metering pump 30, a flowmeter 41, and a control device 42.

[0027] The liquid storage tank 10 is used to store the liquid (dust suppressant). A discharging port 11 may be provided at the top of the liquid storage tank 10, and a lid 12 for opening and closing the discharging port 11 may also be provided at the discharging port 11. The discharging port 11 is used for discharging the liquid into the liquid storage tank 10. When it is necessary to add liquid into the liquid storage tank 10, the lid 12 is opened, and the liquid can be discharged into the liquid storage tank 10 through the discharging port 11; after the liquid addition is completed, the lid 12 is covered to close the discharging port 11.

[0028] A proportioning passage is defined in the proportioning pipeline 20. The proportioning pipeline 20 has a pipeline inlet 21, a pipeline outlet 22, and a liquid addition port 23, and the pipeline inlet 21, the pipeline outlet 22, and the liquid addition port 23 are all communicated with the proportioning passage. Specifically, the pipeline inlet 21 and the pipeline outlet 22 may be respectively located at both ends of the proportioning pipeline 20, and the liquid addition port 23 is located between the pipeline inlet 21 and the pipeline outlet 22. The metering pump 30 has a feed port 31 and a discharge port 32. The feed port 31 is communicated with the liquid storage tank 10, and the discharge port 32 is communicated with the liquid addition port 23. The metering pump 30 is used to pump out the dust suppressant in the liquid storage tank 10 and quantitatively transport the dust suppressant into the proportioning passage through the liquid addition port 23.

[0029] It can be understood that when the liquid quantitative proportioning device 100 is used for the quantitative proportioning between the liquid (dust suppressant) and the medium water, the pipeline inlet 21 is adapted to be communicated with a water source. Exemplarily, the water source may be the pressure water underground in a mine, so that water can enter the proportioning passage through the pipeline inlet 21. Of course, in some other application scenarios, when the liquid quantitative proportioning device 100 is used for the quantitative proportioning between the liquid and other liquid media, the pipeline inlet 21 can also be used to communicate with other liquid media.

[0030] The liquid addition port 23 is connected to the liquid storage tank 10 through the metering pump 30, so that the liquid (dust suppressant) stored in the liquid storage tank 10 can enter the proportioning passage through the liquid addition port 23 and be mixed with water, and the mixed dust suppressant and water flow out of the proportioning passage together through the pipeline outlet 22. Optionally, the pipeline outlet 22 may be connected to a dust suppression spraying device (such as a spray gun, etc.), so that the water mixed with the dust suppressant can be sprayed into the air through the dust suppression spraying device, thereby performing dust suppression.

[0031] A flowmeter 41 is provided between the pipeline inlet 21 and the liquid addition port 23, and the flowmeter 41 is used to detect the flow rate of the water entering the proportioning passage through the pipeline inlet 21.

[0032] The metering pump 30 and the flowmeter 41 are both electrically connected to the control device 42. That is to say, the metering pump 30 is electrically connected to the control device 42, and the flowmeter 41 is also electrically connected to the control device 42. Thus, the flowmeter 41 can feedback the detected flow signal of the water entering the mixing channel to the control device 42, and the control device 42 controls the flow of the liquid material conveyed by the metering pump 30 into the mixing channel according to the received flow signal, so that the ratio between the flow of the water and the flow of the liquid material conveyed into the mixing channel meets the set ratio requirement, thereby realizing the automatic quantitative mixing between the water and the liquid material. In addition, when the flowmeter 41 detects a change in the water flow conveyed into the mixing channel, the control device 42 controls the metering pump 30 to automatically adjust the flow of the liquid material conveyed into the mixing channel according to the flow signal detected by the flowmeter 41, without manual adjustment of the dosage of the liquid material. Optionally, the control device 42 can be a control cabinet.

[0033] In summary, for the liquid material quantitative mixing device 100 according to the embodiment of the present invention, by arranging the flowmeter 41 between the pipeline inlet 21 and the liquid material adding port 23, and at the same time arranging the metering pump 30 between the liquid material tank 10 and the liquid material adding port 23, and both the flowmeter 41 and the metering pump 30 are electrically connected to the control device 42. Thus, the control device 42 can control the flow of the liquid material conveyed by the metering pump 30 into the mixing channel according to the flow signal of the water detected by the flowmeter 41, so that the flow of the water and the flow of the liquid material conveyed into the mixing channel can meet the set ratio requirement, thereby realizing the automatic quantitative mixing between the water and the liquid material with high mixing accuracy. In addition, when the flowmeter 41 detects a change in the water flow conveyed into the mixing channel, the control device 42 controls the metering pump 30 to automatically adjust the flow of the liquid material conveyed into the mixing channel according to the flow signal detected by the flowmeter 41, without manual adjustment of the dosage of the liquid material, and the degree of automation is high.

[0034] Optionally, please refer to Figure 1 , the flowmeter 41 can be a turbine flowmeter, which has high detection accuracy and a simple structure. Of course, this application is not limited to this. In some other embodiments, the flowmeter 41 can also be an electromagnetic flowmeter or a differential pressure flowmeter, etc.

[0035] Understandably, the water pressure in the mine is very unstable. If the operation parameters of the metering pump 30 are controlled only based on the detected flow rate of the pressurized water transported from the pipeline inlet 21 to the mixing channel, it can only be ensured that, under ideal conditions, the flow rate of the dust suppressant pumped by the metering pump 30 into the mixing channel can satisfy the set proportional relationship with the flow rate of the pressurized water transported from the pipeline inlet 21 to the mixing channel, but it is impossible to adjust the pumping pressure of the metering pump 30 (i.e., the liquid pressure at the discharge port 32) according to the change in the water pressure of the pressurized water transported to the mixing channel. In this way, when the pressure of the pressurized water transported to the mixing channel exceeds the pumping pressure of the metering pump 30, that is, the pressure in the mixing channel exceeds the pressure at the discharge port 32 of the metering pump 30, at this time, the liquid pumped out from the discharge port 32 of the metering pump 30 cannot enter the mixing channel through the liquid addition port 23, that is, the input of the liquid in the mixing channel is interrupted, and further the amounts of water and liquid in the mixing channel cannot meet the set proportional requirements.

[0036] It should be noted that the operation parameters of the metering pump 30 described in the present application may include the operation frequency and piston stroke of the metering pump 30, etc. Optionally, both the operation frequency and piston stroke of the metering pump 30 can be automatically controlled in an electric control manner, so that the overall automation degree of the liquid metering and mixing device 100 is higher. Or optionally, only the operation frequency of the metering pump 30 is controlled in an electric control manner, and the piston stroke can be adjusted manually, so as to reduce the cost of the liquid metering and mixing device 100.

[0037] To solve the above technical problems, in an embodiment of the present invention, the liquid metering and mixing device 100 further includes a pressure transmitter 43, the pressure transmitter 43 is electrically connected to the control device 42, and the pressure transmitter 43 is arranged between the pipeline inlet 21 and the flow meter 41, or the pressure transmitter 43 is arranged between the flow meter 41 and the liquid addition port 23. That is to say, in some embodiments, the pressure transmitter 43 is arranged between the pipeline inlet 21 and the flow meter 41; in some embodiments, please refer to Figure 1 , the pressure transmitter 43 is arranged between the flow meter 41 and the liquid addition port 23.

[0038] The pressure transmitter 43 is used to detect the water pressure change of the pressurized water entering the mixing channel from the pipeline inlet 21, and feedback the detected water pressure signal to the control device 42. In this way, the control device 42 can not only receive the flow signal of the pressurized water in the mixing channel fed back by the flowmeter 41, but also receive the pressure signal of the pressurized water in the mixing channel fed back by the pressure transmitter 43. The control device 42 jointly controls the working parameters of the metering pump 30 according to the flow signal and the pressure signal, so that the pumping pressure of the metering pump 30 is greater than the water pressure in the mixing channel, and at the same time, the pumping flow of the metering pump 30 and the flow of the pressurized water delivered to the mixing channel meet the set ratio requirements, thereby avoiding the situation where the metering pump 30 cannot pump the liquid material into the mixing channel, that is, it can ensure that the input of the liquid material in the mixing channel will not be interrupted, and thus the mixing accuracy of the liquid material quantitative mixing device 100 can be greatly improved.

[0039] In some embodiments of the present invention, please refer to Figure 1 , the liquid material quantitative mixing device 100 further includes a flow stabilizing device 50. The flow stabilizing device 50 has a flow stabilizing inlet 521 and a flow stabilizing outlet 522. The flow stabilizing inlet 521 is communicated with the discharge port 32, and the flow stabilizing outlet 522 is communicated with the liquid material adding port 23. That is to say, the flow stabilizing device 50 is connected between the metering pump 30 and the liquid material adding port 23. The liquid material pumped out by the metering pump 30 enters the mixing channel through the liquid material adding port 23 after being pressure stabilized by the flow stabilizing device 50. It can be understood that although the metering pump 30 can pump fluids quantitatively, it is a fluid with pulsed fluctuations in batches, and this fluctuating fluid will affect the mixing accuracy of the dust suppressant and water in the mixing channel. By setting the flow stabilizing device 50, the flow stabilizing device 50 has the function of eliminating fluid fluctuations and stabilizing the flow rate. In this way, the liquid material pumped out by the metering pump 30 is first buffered and pressure stabilized in the flow stabilizing device 50 and then delivered to the mixing channel at a continuous and constant flow rate, thereby further improving the mixing accuracy of the liquid material quantitative mixing device 100.

[0040] Optionally, the flow stabilizing device 50 may include a flow stabilizing tank 51 and a flow stabilizing pipeline 52. A gas buffer chamber is defined in the flow stabilizing tank 51, and a certain amount of gas is stored in the gas buffer chamber. A flow stabilizing inlet 521 and a flow stabilizing outlet 522 are formed at both ends of the flow stabilizing pipeline 52. The flow stabilizing pipeline 52 is further provided with a flow stabilizing adjustment port 523, and the flow stabilizing adjustment port 523 is located between the flow stabilizing inlet 521 and the flow stabilizing outlet 522 and communicates with the gas buffer chamber. The dust suppressant with pulse fluctuations pumped out by the metering pump 30 enters the flow stabilizing pipeline 52 through the flow stabilizing inlet 521. When the fluid pressure in the flow stabilizing pipeline 52 is greater than the air pressure in the gas buffer chamber, part of the dust suppressant will enter the gas buffer chamber through the flow stabilizing adjustment port 523, and the pressure of the gas in the gas buffer chamber will increase. When the pressure of the fluid in the flow stabilizing pipeline 52 is less than the pressure of the gas in the gas buffer chamber, the dust suppressant in the gas buffer chamber will pass through the flow stabilizing adjustment port 523 again and return to the flow stabilizing pipeline 52, so as to ensure that the flow rate of the fluid flowing out of the flow stabilizing outlet 522 is stable and without fluctuations, and further ensure that the flow rate of the dust suppressant entering the proportioning channel through the liquid material addition port 23 is stable and without fluctuations, thereby further improving the proportioning accuracy of the liquid material quantitative proportioning device 100.

[0041] In an embodiment of the present invention, please refer to Figure 1 , the liquid material quantitative proportioning device 100 further includes a pressure relief valve 60. The pressure relief valve 60 has a pressure relief inlet 61 and a pressure relief outlet 62. The pressure relief inlet 61 is communicated with the pipeline between the discharge port 32 and the liquid material addition port 23, and the pressure relief outlet 62 is communicated with the liquid material tank 10 or the feed inlet 31. By setting the pressure relief valve 60, when the pressure in the pipeline between the discharge port 32 and the liquid material addition port 23 exceeds the first pressure threshold, the pressure relief valve 60 automatically opens, and part of the dust suppressant in the pipeline between the discharge port 32 and the liquid material addition port 23 will flow through the pressure relief inlet 61 and the pressure relief outlet 62 in sequence and flow into the liquid material tank 10 or the feed inlet 31. By setting the pressure relief valve 60, when the liquid material quantitative proportioning device 100 works abnormally, it can play a protective role in the liquid material quantitative proportioning device 100 and improve the operation safety of the liquid material quantitative proportioning device 100.

[0042] In an embodiment of the present invention, please refer to Figure 1, the liquid material quantitative proportioning device 100 further includes a pressure sensor 44. The pressure sensor 44 is arranged between the discharge port 32 and the liquid material addition port 23, and is used to monitor the liquid material pressure in the pipeline between the discharge port 32 and the liquid material addition port 23. The pressure sensor 44 is electrically connected to the control device 42. The control device 42 is also electrically connected to an alarm device. The control device 42 controls the alarm device to give an alarm according to the pressure signal fed back by the pressure sensor 44. Specifically, when the pressure value detected by the pressure sensor 44 is greater than the second pressure threshold, the control device 42 will control the alarm device to give an alarm, thereby reminding the staff that the operation of the liquid material quantitative proportioning device 100 is abnormal. After receiving the alarm signal, the staff can stop the machine and perform maintenance on the liquid material quantitative proportioning device 100 in time. Optionally, while controlling the alarm device to give an alarm, the control device 42 can also control the metering pump 30 to stop working, so as to avoid damage to the equipment caused by the staff's failure to handle the operation abnormality in time.

[0043] In an embodiment of the present invention, please refer to Figure 1 , the liquid material quantitative proportioning device 100 not only includes the flow stabilizing device 50, the pressure relief valve 60 and the pressure sensor 44 in the above embodiments at the same time, but also includes a four-way structure 70. Specifically, the flow stabilizing device 50 has a flow stabilizing inlet 521 and a flow stabilizing outlet 522. The flow stabilizing inlet 521 is communicated with the discharge port 32. The pressure relief valve 60 has a pressure relief inlet 61 and a pressure relief outlet 62. The pressure relief outlet 62 is communicated with the liquid material tank 10 or the feed port 31. The pressure sensor 44 is electrically connected to the control device 42. The control device 42 is also electrically connected to an alarm device. The control device 42 controls the alarm device to give an alarm according to the pressure signal fed back by the pressure sensor 44. The four-way structure 70 has a first port, a second port, a third port and a fourth port. The first port is communicated with the flow stabilizing outlet 522, the second port is communicated with the liquid material addition port 23, the third port is communicated with the pressure relief inlet 61, and the fourth port is connected to the pressure sensor 44. The functions and working principles of the flow stabilizing device 50, the pressure relief valve 60 and the pressure sensor 44 have been described in detail above and will not be elaborated here.

[0044] By setting the steady flow device 50, the flow rate of the dust suppressant entering the proportioning channel through the liquid material addition port 23 is stable and without fluctuations, thereby improving the liquid material proportioning accuracy; by setting the pressure relief valve 60, when the pressure in the pipeline between the discharge port 32 and the liquid material addition port 23 exceeds the first pressure threshold, the pressure relief valve 60 automatically opens for pressure relief protection, so as to protect the liquid material quantitative proportioning device 100 when the liquid material quantitative proportioning device 100 malfunctions, and improve the operation safety of the liquid material quantitative proportioning device 100; by setting the pressure sensor 44, when the pressure in the pipeline between the discharge port 32 and the liquid material addition port 23 exceeds the second pressure threshold, the control device 42 controls the alarm device to give an alarm to prompt the staff to stop and repair the equipment.

[0045] In some embodiments, the first pressure threshold and the second pressure threshold are equal. In this way, while the pressure relief valve 60 performs pressure relief protection on the pipeline, the control device 42 also controls the alarm device to give an alarm. Thus, when the equipment malfunctions, the equipment itself starts self-protection and also reminds the staff to protect and repair the equipment, so as to achieve multiple protections for the equipment and make the equipment operation safer and more reliable. Of course, in some other embodiments, the first pressure threshold and the second pressure threshold may not be equal.

[0046] It should be noted that in the present application, the malfunction of the liquid material quantitative proportioning device 100 usually includes: the pipeline of the liquid material quantitative proportioning device 100 is blocked, or electrical components such as the metering pump 30 malfunction, etc.

[0047] In addition, by setting the four-way structure 70, the pipeline connection of the liquid material quantitative proportioning device 100 can be made simpler and more regular.

[0048] Further, please refer to Figure 1 , the liquid material quantitative proportioning device 100 further includes a three-way structure 80. The three-way structure 80 has a fifth port 81, a sixth port 82 and a seventh port 83. The fifth port 81 is communicated with the pressure relief outlet 62, the sixth port 82 is communicated with the liquid material tank 10, and the seventh port 83 is communicated with the feed port 31. By setting the three-way structure 80, the connecting pipelines between the pressure relief outlet 62, the liquid material tank 10 and the feed port 31 can be made simpler and more regular.

[0049] In an embodiment of the present utility model, a liquid level sensor for detecting the liquid level of the liquid in the liquid storage tank 10 is provided in the liquid storage tank 10, and the liquid level sensor is electrically connected to the control device 42. When the liquid level value detected by the liquid level sensor is lower than the set minimum liquid level value, the control device 42 will control the metering pump 30 to stop working, and feeding is required in the liquid storage tank 10. After the feeding is completed, the control device 42 controls the metering pump 30 to start again. Optionally, the liquid level sensor can be a submersible liquid level sensor.

[0050] In an embodiment of the present utility model, the liquid proportioning device 100 further includes a box body 90. The liquid storage tank 10, the proportioning pipeline 20, the metering pump 30, the flow meter 41, the pressure transmitter 43, the flow stabilizing device 50, the pressure relief valve 60, the pressure sensor 44 and the control device 42 described in the above embodiments can all be accommodated in the box body 90. A first avoidance opening 91 and a second avoidance opening 92 are provided on the side wall of the box body 90. The pipeline inlet 21 is embedded in the first avoidance opening 91, and the pipeline outlet 22 is embedded in the second avoidance opening 92. By providing the box body 90, the components accommodated therein can be protected, and at the same time, the overall appearance of the device is made more beautiful.

[0051] In addition, by providing the first avoidance opening 91 on the side wall of the box body 90, the pipeline located outside the box body 90 for connecting the pressure water source can be directly connected to the pipeline inlet 21 outside the box body 90 without extending into the interior of the box body 90, which is convenient for operation; similarly, by providing the second avoidance opening 92 on the side wall of the box body 90, the pipeline outside the box body 90 for connecting the dust suppression spraying device can be directly connected to the pipeline outlet 22 outside the box body 90, and the operation is simple and convenient.

[0052] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0053] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A liquid quantitative proportioning device, characterized in that: include: A liquid tank for storing liquid; A proportioning pipeline, wherein a proportioning channel is defined in the proportioning pipeline, the proportioning pipeline has a pipeline inlet, a pipeline outlet and a feed liquid addition port, the pipeline inlet, the pipeline outlet and the feed liquid addition port are all connected to the proportioning channel, and the feed liquid addition port is located between the pipeline inlet and the pipeline outlet; A metering pump, wherein the metering pump has a feed inlet and a discharge port, the feed inlet is connected to the liquid tank, and the discharge port is connected to the liquid addition port; A flow meter, the flow meter is arranged between the pipeline inlet and the feed liquid addition port; A control device is provided, wherein the metering pump and the flow meter are both electrically connected to the control device.

2. The liquid quantitative proportioning device according to claim 1, characterized in that: It also includes a pressure transmitter, which is arranged between the pipeline inlet and the flow meter, or between the flow meter and the liquid addition port, and the pressure transmitter is electrically connected to the control device.

3. The liquid quantitative proportioning device according to claim 1 or 2, characterized in that: It also includes a flow stabilizing device, which has a flow stabilizing inlet and a flow stabilizing outlet. The flow stabilizing inlet is connected to the discharge port, and the flow stabilizing outlet is connected to the feed liquid addition port.

4. The liquid quantitative proportioning device according to claim 1 or 2, characterized in that: It also includes a pressure relief valve, which has a pressure relief inlet and a pressure relief outlet. The pressure relief inlet is connected to the pipeline between the discharge port and the liquid addition port, and the pressure relief outlet is connected to the liquid tank or the feed port.

5. The liquid quantitative proportioning device according to claim 1 or 2, characterized in that: It also includes a pressure sensor, which is arranged between the discharge port and the liquid addition port, and is used to monitor the liquid pressure in the pipeline between the discharge port and the liquid addition port. The pressure sensor is electrically connected to the control device, and the control device is also electrically connected to an alarm device. The control device controls the alarm device to sound an alarm according to the pressure signal fed back by the pressure sensor.

6. The liquid quantitative proportioning device according to claim 1 or 2, characterized in that: It also includes a flow stabilizing device, a pressure relief valve, a pressure sensor and a four-way structure, the flow stabilizing device has a flow stabilizing inlet and a flow stabilizing outlet, the flow stabilizing inlet is connected to the discharge port, the pressure relief valve has a pressure relief inlet and a pressure relief outlet, the pressure relief outlet is connected to the liquid tank or the feed port, the pressure sensor is electrically connected to the control device, the control device is also electrically connected to an alarm device, the control device controls the alarm device to alarm according to the pressure signal fed back by the pressure sensor, the four-way structure has a first port, a second port, a third port and a fourth port, the first port is connected to the flow stabilizing outlet, the second port is connected to the liquid addition port, the third port is connected to the pressure relief inlet, and the fourth port is connected to the pressure sensor.

7. The liquid quantitative proportioning device according to claim 6, characterized in that: It also includes a three-way structure, which has a fifth port, a sixth port and a seventh port. The fifth port is connected to the pressure relief outlet, the sixth port is connected to the liquid tank, and the seventh port is connected to the feed port.

8. The liquid quantitative proportioning device according to claim 1 or 2, characterized in that: A liquid level sensor for detecting the liquid level of the liquid in the liquid tank is arranged in the liquid tank, and the liquid level sensor is electrically connected to the control device.

9. The liquid quantitative proportioning device according to claim 1 or 2, characterized in that: It also includes a box body, in which the liquid tank, the proportioning pipeline, the metering pump, the flow meter and the control device are all accommodated. A first avoidance port and a second avoidance port are provided on the side wall of the box body. The pipeline inlet is embedded in the first avoidance port, and the pipeline outlet is embedded in the second avoidance port.

10. The liquid quantitative proportioning device according to claim 6, characterized in that: The flow stabilizing device comprises: A swirl pot, wherein a gas buffer chamber is defined in the swirl pot; A flow stabilizing pipeline, wherein the flow stabilizing inlet and the flow stabilizing outlet are formed at both ends of the flow stabilizing pipeline, and the flow stabilizing pipeline is further provided with a flow stabilizing regulating port, wherein the flow stabilizing regulating port is located between the flow stabilizing inlet and the flow stabilizing outlet and is connected to the gas buffer chamber.

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