Compressed gas condensate non-destructive anti-blocking drain

Abstract

The present invention belongs to the technical field of compressed gas purification, and specifically relates to a non-destructive anti-blocking drainer for compressed gas condensate, comprising a controller, an electromagnetic drain valve and a non-contact liquid level sensor. The controller is provided with a first, a second and a third timer, wherein the first timer is used to set a working cycle of the electromagnetic drain valve, the second timer is used to timed start of the electromagnetic drain valve, and the third timer is used to control the drainage time of the electromagnetic drain valve; the controller controls the electromagnetic drain valve to perform an opening or closing operation by integrating the first, the second and the third timers with water or water-free signals sent by the non-contact liquid level sensor; scientific control of the electromagnetic drain valve is achieved through the cooperation of the non-contact liquid level sensor with the first, the second and the third timers, and the number of actions of the electromagnetic drain valve is reduced; all condensate is discharged each time drainage is performed, no water or dirt remains in the drainage pipe and the electromagnetic drain valve, and the electromagnetic drain valve is not easily corroded or blocked by liquid.

Description

Technical Field

[0001] The invention belongs to the technical field of compressed gas purification, and in particular relates to a lossless anti-blocking drainer for compressed gas condensate. Background Art

[0002] Compressed gas is widely used in industrial production. After the gas is compressed and condensed, a large amount of condensed water will be generated. This condensed water is not conducive to the normal operation of gas-using equipment. Specifically, the condensed water on the pneumatic equipment will take away the lubricating oil, causing the equipment efficiency to decrease or even damage; accelerate the wear of the valves in the pipeline, causing the pneumatic control equipment to fail or misoperate; cause the pipeline and equipment to rust, and if water freezes at the low point of the pipeline, the pipeline is also dangerous; if there is water vapor in the compressed air used for spraying, it will directly affect the adhesion of the paint on the workpiece, resulting in coating failure. Therefore, a large number of drainage devices are used in compressed gas systems such as compressors, gas storage tanks, and cold dryers to remove condensed water and produce dry air to meet the normal operation of gas-using equipment.

[0003] Currently, the main methods of air compressor condensate discharge on the market include manual discharge, mechanical float type drain, time relay type electronic drain and non-destructive liquid level sensing type electronic drain. Among them, manual discharge wastes manpower and has poor reliability; the principle of mechanical float-type water drainer discharge is to lift the float ball according to the liquid level inside the container, set the height, and the float ball mechanically opens the liquid level discharge device. No external power supply is required, low investment cost, and discharge is carried out according to the amount of condensate produced, with less gas loss. The disadvantage is that impurities are easy to accumulate, which can easily affect reliability and require frequent maintenance; the time relay type electronic drainer discharge controls the condensate discharge by manually setting the time relay opening time and the solenoid valve opening time. The investment cost is moderate and the installation is simple. However, when the condensate is small, the discharge solenoid valve is still opened according to the set time, causing excessive leakage of compressed gas. The discharge aperture of the drain valve is small, which is easy to get blocked and has poor reliability; the lossless liquid level sensing electronic drainer is not easy to get blocked. It starts and stops according to the water level detected by the built-in liquid level sensor. There will always be water in the drainer, and dirt will inevitably accumulate over time. In addition, the water storage in the drainer is limited. Frequent start and stop of the drainer will inevitably shorten the life of the drainer. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a non-destructive and anti-blocking drainer for compressed gas condensate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A non-destructive anti-blocking drainer for compressed gas condensate, used for draining water from a gas-liquid separator, the non-destructive anti-blocking drainer comprising:

[0007] Controller;

[0008] An electromagnetic drain valve connected to a drain pipe of the gas-liquid separator for controlling drainage;

[0009] A non-contact liquid level sensor is arranged on the drainage pipe to monitor whether there is water in the drainage pipe;

[0010] The controller is provided with a first timer, a second timer and a third timer, wherein the first timer is used to set the working cycle of the electromagnetic drain valve, the second timer is used to start the electromagnetic drain valve at a fixed time, and the third timer is used to control the drainage time of the electromagnetic drain valve;

[0011] The non-contact liquid level sensor detects whether there is water in the drainage pipe and sends a water or no water signal to the controller. The controller integrates the first, second, and third timers with the water or no water signal sent by the non-contact liquid level sensor to control the electromagnetic drain valve to perform an opening or closing operation.

[0012] Preferably, the non-destructive anti-blocking drainer for compressed gas condensate further comprises:

[0013] A manual valve is arranged at the inlet side of the electromagnetic drain valve.

[0014] Preferably, the drainage pipe diameter of the electromagnetic drain valve is

[0015] Preferably, the electromagnetic drain valve and the non-contact liquid level sensor are provided in multiple groups, and a first timer is provided in the controller for setting the working cycle of all the electromagnetic drain valves;

[0016] A one-to-one corresponding second timer is set for each group of electromagnetic drain valves and non-contact liquid level sensors to start the electromagnetic drain valve at a fixed time, and a one-to-one corresponding third timer is set to control the drainage time of the electromagnetic drain valve.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] 1. The non-destructive anti-blocking drainer for compressed gas condensate provided by the present invention realizes scientific control of the electromagnetic drain valve through the cooperation of the non-contact liquid level sensor and the first, second and third timers, and reduces the number of actions of the electromagnetic drain valve; all condensate is discharged each time the drainage is carried out, and no water or dirt remains in the drainage pipe and the electromagnetic drain valve, and the electromagnetic drain valve is not easily corroded and blocked by the liquid;

[0019] 2. The present invention adopts a non-contact liquid level sensor, which is installed on the outside of the drainage pipe. The non-contact liquid level sensor is environmentally friendly and has a low failure rate. It is also easy to repair and replace, reducing future maintenance costs.

[0020] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a controller provided by the present invention controlling a set of electromagnetic drain valves;

[0022] Figure 2 for Figure 1 PLC ladder diagram of the non-destructive anti-blocking drainer;

[0023] Figure 3 for Figure 1 Working sequence diagram of the non-destructive anti-blocking drainer;

[0024] Figure 4 A schematic diagram of a set of controllers provided by the present invention controlling multiple sets of electromagnetic drain valves;

[0025] Figure 5 for Figure 4 PLC ladder diagrams for multiple sets of non-destructive anti-blocking drainers;

[0026] Figure 6 for Figure 4 Timing diagram of multiple sets of non-destructive anti-blocking drainers;

[0027] Explanation of the numbers in the figure: 1-drainage pipe, 10-controller, 20-electromagnetic drain valve, 201-first solenoid drain valve, 202-second solenoid drain valve, 203-third solenoid drain valve, 204-Nth solenoid drain valve, 30-non-contact liquid level sensor, 40-manual valve. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific drawings.

[0029] Combination Figure 1 As shown, the present invention provides a non-destructive anti-blocking drainer for compressed gas condensate, which is used for draining water from a gas-liquid separator. The non-destructive anti-blocking drainer comprises a controller 10, an electromagnetic drain valve 20 and a non-contact liquid level sensor 30; the electromagnetic drain valve 20 is connected to a drain pipe 1 of the gas-liquid separator for controlling drainage; the non-contact liquid level sensor 30 is arranged on the drain pipe 1 for monitoring whether there is water in the drain pipe 1;

[0030] The controller 10 is provided with a first timer T0, a second timer T11 and a third timer T12; the first timer T0 is used to set the working cycle of the electromagnetic drain valve 20, the second timer T11 is used to start the electromagnetic drain valve at a fixed time, and the third timer T12 is used to control the drainage time of the electromagnetic drain valve 20. The electromagnetic drain valve is controlled to drain water according to the time set by the controller and the detection signal of the non-contact liquid level sensor. Various programmable controllers (such as Mitsubishi, Siemens and domestic PCL) input control programs can be used as the controller described in the present invention.

[0031] The non-contact liquid level sensor 30 detects whether there is water in the drainage pipe 1 and sends a water or no water signal to the controller 10. The controller 10 combines the first timer T0, the second timer T11 and the third timer T12 with the water or no water signal sent by the non-contact liquid level sensor 30 to control the electromagnetic drain valve 20 to perform an opening or closing operation.

[0032] In the present invention, by reasonably setting the time of the first timer T0, the number of actions of the electromagnetic drain valve 20 can be effectively reduced, thereby extending the service life of the electromagnetic drain valve 20. Specifically, the electromagnetic drain valve 20 can be Chint NHT-160-15; the non-contact liquid level sensor model is XKC-Y26xk.

[0033] Combination Figure 2 The figure shows the PLC ladder diagram of the lossless anti-blocking drainer for compressed gas condensate provided by the present invention; specifically, the timing parameters on the PLC ladder diagram are the actual values ​​used, and the timing parameters can be set according to actual needs in different specific usage scenarios.

[0034] Controller X001 is the signal input interface of the non-contact liquid level sensor 30, Y001 is the output control signal to start and stop the electromagnetic drain valve 20, T0 is the set drainage cycle time. Reasonable setting time can reduce the number of times the electromagnetic drain valve 20 operates while meeting normal drainage, thereby extending the service life of the electromagnetic drain valve 20; the second timer T11 is the start timer of the electromagnetic drain valve 20, and the third timer T12 is the duration timer of the electromagnetic drain valve 20.

[0035] After the controller X001 is powered on, the first timer T0 starts timing. When the timing reaches the set value of 3200 seconds (the PLC timers selected for this control program are all 100ms, that is, 1 represents 0.1 seconds), the normally open switch of the first timer T0 is closed, and the second timer T11 and the third timer T12 are powered on and start timing. At the same time, electricity passes through the closed normally open switch of the first timer T0, the closed normally closed switch of the third timer T12, and the closed normally closed switch of the second timer T11 to drive Y001 to output a signal to open the electromagnetic drain valve 20. After the residual gas in the drainage pipe 1 is discharged, condensed water is discharged. The non-contact liquid level sensor 30 quickly detects the condensed water and outputs a water signal to X001 to drive the intermediate relay M11. The normally open switch of M11 is closed. After the first timer T0 normally open switch is closed, the second timer T11 counts to the set value 2 seconds later, and the normally closed switch of the second timer T11 is disconnected. The electricity passes through the closed normally open switch of The first timer T0 and the normally closed switch of the third timer T12 are closed, and the normally open switch of the M11 intermediate relay drives the Y001 output signal to keep the electromagnetic drain valve 20 open; after the condensed water in the gas-liquid separator is drained, the non-contact liquid level sensor 30 outputs a water-free signal, the M11 intermediate relay loses power, the M11 normally open switch is disconnected again, Y001 loses power and disconnects, and the output stop signal immediately stops the electromagnetic drain valve 20, thereby preventing the electromagnetic drain valve 20 from leaking compressed air. The set time of the third timer T12 is greater than the actual drainage time of the electromagnetic drain valve 20. After the electromagnetic drain valve 20 completes drainage and stops, after the timing reaches the set value of 300 seconds, the normally closed switch of the third timer T12 is disconnected, the first timer T0, the second timer T11, and the third timer T12 lose power and reset, and their corresponding normally open and normally closed switches are all reset to the initial state, and the first timer T0 restarts timing to start a new operation cycle.

[0036] like Figure 3 This is a working timing diagram of the non-destructive anti-blocking drainer for compressed gas condensate in the present invention, which includes two working cycles, wherein T represents a cycle. After the controller is powered on, the first timer T0 is activated after time t1, the second timer T11 and the third timer T13 start timing, and the electromagnetic drain valve 20 is opened for drainage at the same time. The second timer T11 is activated after 2 seconds, and the electromagnetic drain valve 20 continues to drain when the third timer T12 and the non-contact liquid level sensor 30 detect a water signal. When the drainage is completed, the non-contact liquid level sensor sends a water-free signal, the electromagnetic drain valve 20 stops working, the third timer T12 is activated at time t2, all timers in the ladder diagram are reset, and the controller starts a new operation cycle.

[0037] According to the present invention, the lossless anti-blocking drainer described in the present invention also includes a manual valve 40, and the manual valve 40 is arranged on the inlet side of the electromagnetic drain valve 20; the gas-liquid separator and the lossless anti-blocking drainer can be blocked by the manual valve 40, which is convenient for users to carry out equipment inspection and maintenance, and the flow rate flowing into the lossless anti-blocking drainer is reduced by the manual valve 40, thereby reducing the drainage pressure and protecting the electromagnetic drain valve 20; when the lossless anti-blocking drainer fails, it is blocked in time by the manual valve 40 to avoid the loss of compressed gas and cause excessive fluctuations in the compression system pressure.

[0038] In the present invention, the drainage pipe diameter of the electromagnetic drain valve 20 is Compared with the existing technology using a drainage pipe diameter of The electromagnetic drain valve 20 provided by the present invention can effectively prevent the occurrence of blockage.

[0039] In the present invention, in order to realize the simultaneous drainage control of multiple gas-liquid separators, the electromagnetic drain valves and non-contact liquid level sensors are provided in multiple groups, and a first timer is provided in the controller for setting the working cycle of all electromagnetic drain valves; a one-to-one corresponding second timer is provided for each group of electromagnetic drain valves and non-contact liquid level sensors to start the electromagnetic drain valve at a fixed time, and a one-to-one corresponding third timer is provided to control the drainage duration of the electromagnetic drain valve. That is, the first timer is used to control the working cycle of all electromagnetic drain valves. If the time set is long, the drainage cycle of all electromagnetic drain valves will be long; if the time set is short, the drainage cycle of all electromagnetic drain valves will be short; the second and third timers are respectively set correspondingly to each group of electromagnetic drain valves and non-contact liquid level sensors.

[0040] Specific, combined Figure 4 As shown, the electromagnetic drain valves are respectively a first electromagnetic drain valve 201, a second electromagnetic drain valve 202, a third electromagnetic drain valve 203, and an Nth electromagnetic drain valve 204; and each electromagnetic drain valve is connected to the drain pipe 1 of each gas-liquid separator, so as to control the drainage of each gas-liquid separator; the non-contact liquid level sensor 30 is arranged on the drain pipe 1 of each gas-liquid separator, so as to monitor whether there is water in each drain pipe 1.

[0041] Combination Figure 5 The figure shows the PLC ladder diagram of multiple sets of lossless anti-blocking drainers provided by the present invention. Figure 6 The timing diagram of multiple sets of non-destructive anti-blocking drainers provided by the present invention. The timing parameters on the PLC ladder diagram are the actual values ​​used. In different specific usage scenarios, the timing parameters can be set according to actual needs. Considering that the circuits are too long and the timing diagram is too complicated, the PLC ladder diagram and the timing diagram are both drawn with two drain valves.

[0042] Controller X001 is the non-contact liquid level sensor signal input terminal of the first electromagnetic drain valve 201. Y001 outputs a control signal to start and stop the first electromagnetic drain valve 201. T11 is the start timer of the first electromagnetic drain valve 201, that is, the second timer; T12 is the drainage duration timer of the first electromagnetic drain valve 201, that is, the third timer.

[0043] The second electromagnetic drain valve 202 corresponds to the non-contact sensor signal input terminal X002, the corresponding start and stop signal is Y002, the corresponding start timer is T21, that is, the second timer; the corresponding drainage time timer is T22, that is, the third timer;

[0044] The third electromagnetic drain valve 203 corresponds to the input and output ports in the controller and the start timer and drain duration timer are X003, Y003, T31, T32 respectively;

[0045] The Nth electromagnetic drain valve 204 corresponds to the input and output ports and the start timer and the drain duration timer in the controller respectively Xn, Yn, Tn1, Tn2.

[0046] After the controller is powered on, the working principle of the first electromagnetic drain valve of the controller is the same as that of a controller controlling a set of drainers. After the T12 timer counts for 300 seconds, the normally closed switch of T12 is closed, and T21 and T22 are powered on for timing. In addition, the electricity passes through the normally open switch closed by T12, the normally closed switch closed by T22, and the normally closed switch closed by T21 to drive Y002. Y002 outputs a start signal to open the second electromagnetic drain valve 202. After the residual gas in the drainage pipe is discharged, the condensed water is discharged. The non-contact liquid level sensor quickly detects the condensed water and outputs a water signal to X002 to drive the intermediate relay M21. The normally open switch of M21 is closed; T21 is at T After the normally open switch 12 is closed and the timing reaches the set value of 2 seconds, the normally closed switch T11 is disconnected; the electricity passes through the closed T12, the closed normally closed switch T22, and the closed normally open switch of the intermediate relay M21 to drive the output signal Y002 to keep the electromagnetic drain valve open; the condensed water in the gas-liquid separator is drained, the non-contact liquid level sensor immediately outputs a water-free signal, the intermediate relay M21 loses power, the normally open switch M21 is disconnected again, Y002 loses power and disconnects, and the output stop signal immediately stops the electromagnetic drain valve, avoiding the electromagnetic drain valve from discharging compressed air. The T22 timer setting time is greater than the actual drainage time of the electromagnetic drain valve. After the electromagnetic drain valve stops draining, the timing reaches the set value of 300 seconds, the normally closed switch T22 is disconnected, and the normally open switch T22 is closed. After the normally open switch T22 is closed, T31, T32, and Y003 are energized to open the third solenoid drain valve 203. After the third solenoid drain valve 203 completes the drainage process like the first solenoid drain valve 201 and the second solenoid drain valve 202, the next level solenoid drain valve is started until the solenoid drain valve N completes the drainage. After the Tn2 timer counts for 300 seconds, the Tn2 normally closed switch opens and the T0 timer loses power and resets. All timers in the controller also lose power and reset one after another within a PLC working cycle. The Tn2 normally closed switch is closed again, and T0 starts timing, starting a new operating cycle.

[0047] One controller controls one set of drainage and one controller controls multiple sets of drainage. Auxiliary programs are also set up inside the control to test whether the drainage is normal, which will not be described in detail here.

[0048] Start timer T11, T21...Tn1 working principle description:

[0049] Before the electromagnetic drain valve drains water, a little air remains in the drain pipe, and the non-contact liquid level sensor detects a waterless signal. In this case, no matter which stage the controller's timer is in, Y001 will not send an opening signal to drive the electromagnetic drain valve to drain water. When the first timer T0 counts to the set value, the electricity drives Y001 to output a signal to open the electromagnetic drain valve through the closed normally open switch of the first timer T0, the closed normally closed switch of the third timer T12, and the closed normally closed switch of the second timer T11. The residual gas in the drain pipe is immediately discharged, and the drain pipe is filled with condensed water. The non-contact liquid level sensor detects a water signal. At this time, the third timer T12 in the controller and the non-contact liquid level sensor work together to drive Y001 to send a start signal to continuously open the electromagnetic drain valve for drainage. The second timer T11 acts 2 seconds after being energized, and the second timer T11 normally closed switch is disconnected. The subsequent drainage action of the electromagnetic drain valve is completed by the third timer T12 and the non-contact liquid level sensor. The working principle of other start timers is the same as that of the second timer T11 and will not be described. The start timer only works for a very short 2 seconds in the program (this time can be changed according to actual conditions), but the role it plays is irreplaceable. Without the start timer, the solenoid drain valve cannot drain normally.

[0050] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A non-destructive anti-blocking drainer for compressed gas condensate, used for draining gas-liquid separators, characterized in that: The non-destructive anti-blocking drainer comprises: Controller; An electromagnetic drain valve connected to a drain pipe of the gas-liquid separator for controlling drainage; A non-contact liquid level sensor is provided on the drainage pipe to monitor whether there is water in the drainage pipe; The controller is provided with a first timer, a second timer and a third timer, wherein the first timer is used to set the working cycle of the electromagnetic drain valve, the second timer is used to start the electromagnetic drain valve at a fixed time, and the third timer is used to control the drainage time of the electromagnetic drain valve; The non-contact liquid level sensor detects whether there is water in the drainage pipe and sends a water or no water signal to the controller. The controller controls the electromagnetic drain valve to perform an opening or closing operation by combining the first, second, and third timers with the water or no water signal sent by the non-contact liquid level sensor; Also includes: A manual valve, arranged at the inlet side of the electromagnetic drain valve; The drainage pipe diameter of the electromagnetic drain valve is φ15mm; The electromagnetic drain valves and non-contact liquid level sensors are provided in multiple groups, and a first timer is provided in the controller for setting the working cycle of all electromagnetic drain valves; A one-to-one corresponding second timer is set for each group of electromagnetic drain valves and non-contact liquid level sensors to start the electromagnetic drain valve at a fixed time, and a one-to-one corresponding third timer is set to control the drainage time of the electromagnetic drain valve; Controller X001 is the signal input interface of the non-contact liquid level sensor. After the controller X001 is powered on, the first timer starts timing. When the timing reaches the set value of 3200 seconds, the normally open switch of the first timer is closed, and the second and third timers are powered on to start timing. At the same time, electricity passes through the normally open switch of the closed first timer, the normally closed switch of the closed third timer, and the normally closed switch of the closed second timer to drive Y001 to output a signal to open the electromagnetic drain valve. After the residual gas in the drainage pipe is discharged, condensed water is discharged. The non-contact liquid level sensor quickly detects the condensed water and outputs a water signal to X001 to drive the intermediate relay M11. The normally open switch of the intermediate relay M11 is closed, and the second timer is After the normally open switch of the first timer is closed and the timing reaches the set value of 2 seconds, the normally closed switch of the second timer is disconnected, and the electricity passes through the closed first timer, the normally closed switch of the third timer, and the normally open switch of the intermediate relay M11 to drive the Y001 output signal to keep the electromagnetic drain valve open; after the condensed water in the gas-liquid separator is drained, the non-contact liquid level sensor outputs a water-free signal, the intermediate relay M11 loses power, the normally open switch of the intermediate relay M11 is disconnected again, Y001 loses power and disconnects, and the output stop signal immediately stops the electromagnetic drain valve, thereby preventing the electromagnetic drain valve from leaking compressed air. The set time of the third timer is greater than the actual drainage time of the electromagnetic drain valve. After the electromagnetic drain valve completes drainage and stops, after the timing reaches the set value of 300 seconds, the normally closed switch of the third timer is disconnected, the first timer, the second timer, and the third timer lose power and reset, and their corresponding normally open and normally closed switches are all reset to the initial state, the first timer restarts timing, and a new operation cycle begins.

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