A numerical control double exhaust device with air suction function for pressure pipeline and a control method thereof

Abstract

A kind of numerical control double exhaust device with suction function of pressure pipeline and control method, the exhaust device includes four-way, exhaust valve, liquid limit switch, micro electric ball valve, exhaust pipe, controller;Wherein, four-way is communicated with pressure pipeline;Exhaust valve is installed on the top of four-way;Liquid limit switch is installed on one side of four-way, and liquid limit switch fork body is inserted into four-way;Micro electric ball valve is installed on the other side of four-way;Exhaust pipe is connected with micro electric ball valve;Controller is used to control micro electric ball valve to open or close according to the data monitored by liquid limit switch.This exhaust device ingeniously uses four-way, installs float ball exhaust valve on the top of four-way, installs micro electric ball valve on one side of four-way, uses float ball exhaust valve and micro electric ball valve to exhaust gas in pipeline, exhaust capacity is large, exhaust effect is good, reliability is high, solves the technical problem that existing exhaust valve cannot normally exhaust due to large gas accumulation when discharging and prone to blowout phenomenon.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of exhaust device and the field of digital control, in particular to a pressure pipeline digital control double exhaust device with air suction function and a control method. BACKGROUND

[0002] A large number of pipelines are arranged in the energy, chemical, heating and other industries to transport working medium. A large amount of gas will accumulate in the pipelines at the initial stage of system operation and during operation. The hazards of gas accumulation are as follows: 1. Gas accumulation leads to reduced pipeline flow, affecting working medium circulation, and even causing circulation interruption; 2. Gas accumulation in the pipeline causes metal corrosion, which will cause leakage after a long time; 3. Gas accumulation affects heat exchange of the working medium; 4. Gas accumulation causes pipeline vibration; therefore, the gas in the pipeline must be discharged in time.

[0003] At present, in the energy, chemical, heating industry, mechanical air exhaust valve is commonly used to discharge air in the pipeline. The mechanical air exhaust valve includes a floating ball type exhaust valve and a composite exhaust valve. However, the structure characteristics of the floating ball type exhaust valve and the composite exhaust valve have the following disadvantages: 1. When a large amount of air needs to be discharged from the pressure pipeline, blowout will occur and normal exhaust will not be achieved. 2. In cold northern environments, the exhaust function is often lost due to freezing. 3. There is no gas accumulation state display, and state monitoring and action condition statistics cannot be performed, and only manual exhaust can be performed. In view of the actual application of the floating ball type exhaust valve and the composite exhaust valve in the power plant, the application in the large flow pressure pipeline is not ideal, especially in the cold northern working environment, which cannot normally operate, affecting the reliability of power generation and heating, and belongs to an industry problem. SUMMARY

[0004] The purpose of the present application is to provide a pressure pipeline digital control double exhaust device with air suction function. The exhaust device ingeniously uses a four-way valve, installs a floating ball exhaust valve on the top of the four-way valve, and installs a micro electric ball valve on one side of the four-way valve. The floating ball exhaust valve and the micro electric ball valve are used to exhaust the gas in the pipeline. The exhaust device has large exhaust capacity, good exhaust effect and high reliability, and solves the technical problem that the existing exhaust valve cannot normally exhaust due to large gas accumulation and blowout during exhaust.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] The application discloses a numerical control double exhaust device with an air suction function for a pressurized pipeline, which comprises a cross, an exhaust valve, a liquid limit switch, a micro electric ball valve, an exhaust pipe, a controller and a power supply.

[0007] As a preferred embodiment of the application, the exhaust device further comprises a spring return ball valve, which is a manual ball valve, and the spring return ball valve and the micro electric ball valve are both in communication with the cross and are both normally closed ball valves.

[0008] As a preferred embodiment of the application, the exhaust device further comprises a gas accumulation indicating lamp, an automatic exhaust indicating lamp and a sensor fault indicating lamp connected with the controller, the gas accumulation indicating lamp is used to send a gas accumulation alarm signal and is bright when the liquid limit switch cannot monitor data, the automatic exhaust indicating lamp is used to prompt whether it is automatic exhaust and is bright after the micro electric ball valve is opened, and the sensor fault indicating lamp is used to prompt whether the liquid limit switch is faulty and is bright when the liquid limit switch pin has no data output.

[0009] As a preferred embodiment of the application, the exhaust device further comprises an anti-freezing assembly, a top temperature probe and a barrel body temperature probe, the heating pipeline of the anti-freezing assembly is arranged on the exhaust valve, the spring return ball valve and the micro electric ball valve and is used to heat the exhaust valve, the spring return ball valve and the micro electric ball valve, the top temperature probe is fixed at the exhaust port of the exhaust valve, the barrel body temperature probe is fixed on the side wall of the exhaust valve, the top temperature probe and the barrel body temperature probe are connected with a temperature controller, and the temperature controller is used to control the on or off of the circulating pump of the anti-freezing assembly according to the data monitored by the top temperature probe and the barrel body temperature probe.

[0010] As a further preferred embodiment of the application, the cross is an equal-diameter cross, the lower surface of the equal-diameter cross is connected with a flange through a connecting piece, the flange is fixedly installed at the pipeline exhaust port of the highest point of the pressurized pipeline, so that the pressurized pipeline and the equal-diameter cross form a communication structure, an anti-blocking pair of wires is arranged above the equal-diameter cross and makes the equal-diameter cross and the exhaust valve form a communication structure, one side of the equal-diameter cross close to the ball valve is connected with a tee joint through a connecting piece, the upper portion of the tee joint is connected with the spring return ball valve through a connecting piece, and the other end of the tee joint is connected with the micro electric ball valve through a connecting piece, the inside of the anti-blocking pair of wires is provided with a partition plate, a throttle hole is formed in the partition plate, the throttle hole is arranged in a staggered mode with the exhaust port of the float ball exhaust valve, and the diameter of the throttle hole is smaller than that of the exhaust port at the top of the exhaust valve.

[0011] As a further preferred embodiment of the present application, the exhaust valve is a floating ball exhaust valve or a composite exhaust valve; the connecting member comprises a wire; the bottom of the exhaust pipe is provided with a drain port, the end of the handle of the spring return ball valve is fixed with a pull line ring, the pull line ring is connected with a soft rope, and the spring return ball valve is started by pulling the soft rope.

[0012] As a further preferred embodiment of the present application, the controller is a Hongrun OHR-PR10 logic controller, the L(+) terminal of the controller and the double lead terminal left end of Q1 are connected with the positive pole of the power supply through the switch K1; the N(-) terminal is connected with the negative pole of the power supply; the I0 terminal is connected with the 2-pin of the liquid limit switch through a cable, and the I1 terminal is connected with the 4-pin of the liquid limit switch through a cable; the single lead terminal of Q0 is connected with the positive pole of the power supply through the switch K2; one way of the double lead terminal of Q0 is connected with the positive pole of the micro electric ball valve, and the other way is connected with the positive pole of the automatic exhaust indicator HL1; the single lead terminal of Q1 is connected with the positive pole of the gas accumulation indicator HL2, the right end of the double lead terminal of Q1 is connected with one end of the Q2 terminal of the controller, and the other end of the Q2 terminal is connected with the positive pole of the sensor fault indicator HL3; the I6 terminal and the I7 terminal are connected with the positive pole of the power supply 19 through the switches K4 and K5;

[0013] The 1-pin of the liquid limit switch is connected with the positive pole of the power supply through the switch K1, and the 3-pin of the liquid limit switch is connected with the negative pole of the power supply; the negative pole of the micro electric ball valve, the negative pole of the automatic exhaust indicator HL1, the negative pole of the gas accumulation indicator HL2, and the negative pole of the sensor fault indicator HL3 are connected with the negative pole of the power supply.

[0014] As a further preferred embodiment of the present application, the anti-freezing assembly comprises a heat exchanger, a ball valve heating pipeline, a barrel heating pipeline, a top heating pipeline, a circulating pump, and a circulating liquid tank; wherein the heat exchanger is closely attached to a hot pressurized pipeline, and the outlet of the heat exchanger is connected with the inlet of the ball valve heating pipeline; the ball valve heating pipeline is arranged around the spring return ball valve and the micro electric ball valve, and the outlet of the ball valve heating pipeline is connected with the inlet of the barrel heating pipeline; the barrel heating pipeline is wound around the barrel of the exhaust valve, and the outlet of the barrel heating pipeline is connected with the inlet of the top heating pipeline; the top heating pipeline is arranged at the top end of the exhaust valve, and the outlet of the top heating pipeline is connected with the inlet of the circulating liquid tank; the circulating liquid tank is filled with anti-freezing liquid, and the circulating liquid tank is connected with the inlet of the circulating pump; and the outlet of the circulating pump is connected with the inlet of the heat exchanger.

[0015] As a further preferred embodiment of the present application, the heat exchanger is a curved heat exchanger, the radius Rq of the curved heat exchanger is consistent with the radius Rg of the pressurized pipeline, and a heat-conducting grease is coated on the joint surface of the curved heat exchanger and the pressurized pipeline; the installation position of the circulating pump is higher than that of the curved heat exchanger; the temperature controller is connected with the top temperature probe and the barrel temperature probe through cables, the Vin end of the temperature controller is connected with the positive electrode of the power supply through the switch K3, the negative electrode of the temperature controller is connected with the negative electrode of the power supply, the Vout end of the temperature controller is connected with the positive electrode of the circulating pump motor, and the negative electrode of the circulating pump motor is connected with the negative electrode of the power supply; and the Vin end and the Vout end of the temperature controller are connected with the switch K6.

[0016] The present application also provides a control method of the pressurized pipeline numerical control double exhaust device with air suction function, which comprises the following steps:

[0017] (1) power-on starting, the exhaust device starts to run, when the accumulated gas in the pipeline reaches a certain amount, the floating ball in the floating ball exhaust valve drops, and the automatic exhaust starts; when the amount of accumulated gas is too large, the liquid level in the four-way valve drops below the liquid limit switch fork, and the liquid limit switch sends a high level;

[0018] (2) the high level signal sent by the liquid limit switch is transmitted to the IO end of the Hongrun OHR-PR10 logic controller through a cable, the IO is closed, the T00 timer in the logic controller starts timing, and a Q1 closing instruction is output, the accumulated gas indicator HL2 is bright, and an accumulated gas alarm signal is sent; when the cumulative time of the T00 timer exceeds the set value, a Q0 closing instruction is sent, the miniature electric ball valve is opened, the automatic exhaust indicator HL1 is bright, and the exhaust starts through the exhaust pipe;

[0019] (3) when the air in the pipeline is exhausted, the liquid limit switch fork is covered by the liquid, the low level signal sent by the liquid limit switch is transmitted to the IO end of the Hongrun OHR-PR10 logic controller through a cable, the IO is disconnected, the logic controller sends Q0 opening and Q1 opening instructions, the accumulated gas indicator HL2 is off, the miniature electric ball valve is automatically closed, and the automatic exhaust indicator HL1 is off, and the cycle is repeated;

[0020] (4) when the automatic exhaust indicator HL1 and the accumulated gas indicator HL2 are in the bright state for a long time, the spring reset ball valve is manually controlled to make the gas in the pipeline exhaust through the spring reset ball valve;

[0021] (5) When the water in the pipeline stops, the liquid level in the pipeline drops, and the pipeline generates negative pressure, at this time the ball float exhaust valve opens quickly, and air is sucked; due to the drop of the liquid level in the pipeline, the high-level signal of the liquid level switch is transmitted to the IO end of the Hongrun OHR-PR10 logic controller through the cable, and the T00 timer inside the logic controller starts timing, when the cumulative time of the T00 timer exceeds the set value, the micro electric ball valve is automatically opened, and the pipeline realizes double-way air suction.

[0022] The advantages and positive effects of the present application are:

[0023] (1) The exhaust device provided by the present application ingeniously uses a four-way, installs a ball float exhaust valve on the top of the four-way, and installs a micro electric ball valve on one side of the four-way, the ball float exhaust valve and the pipeline form a communication structure, and the gas in the pipeline can be discharged; the micro electric ball valve also forms a communication structure with the pipeline, and due to the existence of the four-way, a height difference is formed between the micro electric ball valve and the pipeline, so that the micro electric ball valve can also be used for exhaust and air suction, the exhaust and air suction amount of the device is twice that of the ordinary ball float exhaust valve, the exhaust and air suction amount is large, the exhaust and air suction effect is good, and the reliability is high.

[0024] (2) The exhaust device provided by the present application installs a liquid level switch in the four-way, and the amount of gas accumulated in the pipeline can be determined through the liquid level switch, when the amount of gas is small, the ball float exhaust valve can be used for exhaust; when the amount of gas is too large, the micro electric ball valve is opened for exhaust, and the whole exhaust process can be automatically controlled through the logic controller, the exhaust mode is simple and controllable.

[0025] (3) The exhaust device provided by the present application further installs an automatic exhaust indicating lamp HL1, a gas accumulation indicating lamp HL2 and a sensor fault indicating lamp, through the indicating lamps, the gas accumulation in the pipeline, the current working state of the exhaust device and the sensor state can be observed in real time, and the operator can control the exhaust condition.

[0026] (4) The exhaust device provided by the present application further provides a spring reset ball valve, the spring reset ball valve is installed on the top of the three-way, and forms a communication structure with the pipeline through the four-way, the installation position of the spring reset ball valve enables it to be used for exhaust, when the gas accumulated in the pipeline cannot be completely discharged through the micro electric ball valve for a long time, the spring reset ball valve is manually controlled, at this time, the gas is discharged through the spring reset ball valve.

[0027] (5) The exhaust device provided by the present application can realize numerical control of pipeline exhaust through the logic controller, and achieve accurate exhaust and accurate recording; in addition, the device can be provided with an RS485 interface, and remote communication can be realized.

[0028] (6) The exhaust device provided by the present invention uses an anti-blow-blocking thread to connect the four-way valve and the float exhaust valve, so as to avoid the blow-blocking phenomenon when the float exhaust valve is venting.

[0029] (7) The exhaust device provided by the present invention is equipped with an antifreeze component. The antifreeze component uses the pipe itself as a heat source. Through the cooperation of the curved heat exchanger and the heating pipe, heat exchange is achieved under the drive of the circulating pump, which plays an antifreeze role and solves the problem that the existing exhaust valve often loses its exhaust function due to freezing in the cold northern environment.

[0030] (8) The exhaust device provided by the present invention is equipped with a temperature probe and a temperature controller, which can realize intelligent control and keep the temperature at the exhaust valve and ball valve between 5-20°C. After the device is equipped with antifreeze components, the temperature adaptability range is wider. By using antifreeze, it can adapt to extremely cold weather. Attached Figure Description

[0031] Figure 1 This is a front view schematic diagram of the CNC exhaust device provided by the present invention;

[0032] Figure 2 This is a left-side view of the CNC exhaust device provided by the present invention;

[0033] Figure 3 This is a top view schematic diagram of the CNC exhaust device provided by the present invention;

[0034] Figure 4 For the present invention Figure 1 A cross-sectional view at position AA in the middle;

[0035] Figure 5 For the present invention Figure 2 A cross-sectional view at position BB in the middle;

[0036] Figure 6 This is a schematic diagram of the circulating liquid tank and circulating pump of the present invention;

[0037] Figure 7 This is a front view of the curved surface heat exchanger of the present invention;

[0038] Figure 8 This is a top view of the curved surface heat exchanger of the present invention;

[0039] Figure 9 This is a circuit diagram of the controller and temperature controller of the present invention;

[0040] Figure 10 This is a schematic diagram showing the installation position of the exhaust device of the present invention;

[0041] Figure 11 For the present invention Figure 10 A cross-sectional view at position CC.

[0042] Fig. 1: flange, 2: equal diameter four-way, 3: liquid limit switch, 3-1: liquid limit switch fork body, 4: anti-blowing plug pair, 4-1: throttling hole, 5: floating ball exhaust valve, 6: barrel body temperature probe, 7: barrel body heating pipeline, 7-1: inlet of barrel body heating pipeline, 7-2: outlet of barrel body heating pipeline, 8: exhaust port, 9: top heating pipeline, 9-1: inlet of top heating pipeline, 9-2: outlet of top heating pipeline, 10: spring return ball valve, 10-1: handle of spring return ball valve, 11: ball valve heating pipeline, 11-1: inlet of ball valve heating pipeline, 11-2: outlet of ball valve heating pipeline, 12: three-way, 13: miniature electric ball valve, 14: exhaust pipe, 14-1: exhaust pipe water outlet, 15: circulating pump, 15-1: outlet of circulating pump, 15-2: inlet of circulating pump, 16: circulating liquid tank, 16-1: inlet of circulating liquid tank, 16-2: liquid inlet of circulating liquid tank, 17: curved surface heat exchanger, 17-1: inlet of curved surface heat exchanger, 17-2: outlet of curved surface heat exchanger, 18: top temperature probe, 19: power supply, 20: Hongrun logic controller PR10, 21: temperature controller, 22: highest point pipeline exhaust port. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0044] In the description of the present application, it should be noted that the terms "upper", "left" and the like indicate the orientation or positional relationship: based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Embodiment 1

[0047] As shown in Figures 1 to 11 The present application provides a numerical control double exhaust device with suction function for pressure pipeline, which comprises an equal diameter four-way 2, a floating ball exhaust valve 5, a liquid limit switch 3, a miniature electric ball valve 13, a spring return ball valve 10, an exhaust pipe 14, a controller 20 and a power supply 19.

[0048] Wherein, the lower part of the equal-diameter cross 2 is connected with the flange 1 by screwing, the flange 1 is fixed at the highest point of the pipeline exhaust port 22 of the pressurized pipeline, so that the pressurized pipeline is in communication with the equal-diameter cross 2; the top of the equal-diameter cross 2 is connected with the float ball exhaust valve 5 by the blowout-preventing screw 4; the left side of the equal-diameter cross 2 is connected with the liquid level switch 3 by the connecting piece; the right side of the equal-diameter cross 2 is connected with the tee joint 12 by the connecting piece; the upper part of the tee joint 12 is connected with the spring return ball valve (normally closed) 10 by the connecting piece, and the right end of the tee joint 12 is connected with the micro electric ball valve 13 (the embodiment adopts the electric ball valve of the power-off reset type) by the connecting piece;

[0049] The liquid level switch 3 and the micro electric ball valve 13 are electrically connected with the controller 20, and the controller 20 is used for controlling the micro electric ball valve 13 to open or close according to the data monitored by the liquid level switch 3;

[0050] The other end of the micro electric ball valve 13 is connected with the exhaust pipe 14 by the connecting piece, and the bottom of the exhaust pipe 14 is provided with an exhaust pipe drain 14-1;

[0051] The power supply 19 is used for supplying power for the exhaust device.

[0052] Further, in the embodiment, the liquid level switch 3 adopts the direct current Liquiphant FTL33 PNP type liquid level switch, and when the liquid level switch 3 is installed, attention should be paid to the position of the liquid level switch fork body 3-1, that is, the liquid level switch fork body 3-1 needs to be inserted into the equal-diameter cross 2, and this installation mode can reduce the disturbance of the turbulence in the pipeline. Figure 4

[0053] Further, in the embodiment, the spring return ball valve 10 is a manual ball valve, and the spring return ball valve 10 and the micro electric ball valve 13 are both normally closed ball valves; the end of the handle 10-1 of the spring return ball valve is fixed with a pull line ring, the pull line ring is connected with a soft rope, the spring return ball valve 10 is started by pulling the soft rope, and ground position manual operation is realized.

[0054] Further, in the embodiment, the float ball exhaust valve 5 can also be replaced with a composite exhaust valve or other mechanical exhaust valve, and the exhaust valve in the above-mentioned exhaust device is not limited to the float ball exhaust valve.

[0055] Further, in the embodiment, the inside of the blowout-preventing screw 4 is provided with a partition plate, a throttle hole 4-1 is formed in the partition plate, the throttle hole 4-1 is arranged in a staggered manner with the exhaust port 8 of the float ball exhaust valve 5, and the diameter of the throttle hole is smaller than the diameter of the exhaust port at the top of the float ball exhaust valve (as shown in Figure 5 The installation structure can avoid the blowout-preventing phenomenon during exhaust. ​

[0056] As Figure 8 shown in the embodiment, the controller 20 is OHR-PR10 logic controller; the L(+) terminal of the controller and the left end of the double lead terminal of Q1 are connected with the positive pole of the power supply 19 through the switch K1; the N(-) terminal is connected with the negative pole of the power supply 19; the I0 terminal is connected with the 2-pin of the liquid limit switch 3 through the cable, and the I1 terminal is connected with the 4-pin of the liquid limit switch 3 through the cable; the single lead terminal of Q0 is connected with the positive pole of the power supply 19 through the switch K2; one way of the double lead terminal of Q0 is connected with the positive pole of the micro electric ball valve 13, and the other way is connected with the positive pole of the automatic exhaust indicating lamp HL1; the single lead terminal of Q1 is connected with the positive pole of the gas accumulation indicating lamp HL2, and the right end of the double lead terminal of Q1 is connected with one end of the Q2 terminal of the controller, and the other end of the Q2 terminal is connected with the positive pole of the sensor fault indicating lamp HL3; the I6 terminal and the I7 terminal are connected with the positive pole of the power supply 19 through the switch K4 and the switch K5;

[0057] The 1-pin of the liquid limit switch 3 is connected with the positive pole of the power supply 19 through the switch K1, and the 3-pin of the liquid limit switch 3 is connected with the negative pole of the power supply 19; the negative pole of the micro electric ball valve 13, the negative pole of the automatic exhaust indicating lamp HL1, the negative pole of the gas accumulation indicating lamp HL2, and the negative pole of the sensor fault indicating lamp HL3 are connected with the negative pole of the power supply.

[0058] Continuing to refer to Figures 1 to 3 , Figures 6 to 9 In another embodiment, the exhaust device further comprises an anti-freezing assembly, a top temperature probe 18, a barrel temperature probe 6, and a temperature controller 21; wherein the heating pipeline of the anti-freezing assembly is arranged on the floating ball exhaust valve 5, the spring reset ball valve 10, and the micro electric ball valve 13, for heating the floating ball exhaust valve 5, the spring reset ball valve 10, and the micro electric ball valve 13; the top temperature probe 18 is fixed at the exhaust port of the floating ball exhaust valve 5, and the barrel temperature probe 6 is fixed on the side wall of the floating ball exhaust valve 5; the top temperature probe 18 and the barrel temperature probe 6 are connected with the temperature controller 21; the temperature controller 21 is used for controlling the on or off of the circulating pump 15 of the anti-freezing assembly according to the data monitored by the top temperature probe 18 and the barrel temperature probe 6.

[0059] Furthermore, the antifreeze component described in this embodiment includes a curved heat exchanger 17, a ball valve heating pipe 11, a cylinder heating pipe 7, a top heating pipe 9, a circulating pump 15 (a miniature DC brushless water pump is used in this embodiment), and a circulating liquid tank 16; wherein, the radius Rq of the curved heat exchanger 17 is consistent with the radius Rg of the pressurized pipe, the surface where the curved heat exchanger 17 and the pressurized pipe meet is coated with thermal grease, the curved heat exchanger is in close contact with the hot pressurized pipe, and the outlet 17-2 of the curved heat exchanger is connected to the inlet 11-1 of the ball valve heating pipe; the ball valve heating pipe 11 is arranged around the spring-return ball valve 10 and the miniature electric ball valve 13, and the outlet 11-2 of the ball valve heating pipe is connected to the cylinder heating pipe The inlet 7-1 of the pipeline is connected; the cylinder heating pipeline 7 is wound around the cylinder of the float vent valve 5, and the outlet 7-2 of the cylinder heating pipeline is connected to the inlet 9-1 of the top heating pipeline; the top heating pipeline 9 is arranged at the top of the float vent valve, and the outlet 9-2 of the top heating pipeline is connected to the inlet of the circulating liquid tank 16; the circulating liquid tank 16 is filled with antifreeze, and the antifreeze is added through the filling port 16-2 of the circulating liquid tank; the circulating liquid tank 16 is connected to the inlet 15-2 of the circulating pump; the outlet 15-1 of the circulating pump is connected to the inlet 17-1 of the curved surface heat exchanger, and the antifreeze component circulates in the closed pipeline under the drive of the circulating pump 15 to achieve heat exchange.

[0060] like Figure 9 As shown, in this embodiment, the temperature controller 21 is connected to the top temperature probe 6 and the cylinder temperature probe 18 via cables. The Vin terminal of the temperature controller is connected to the positive terminal of the power supply 19 via switch K3, the negative terminal of the temperature controller is connected to the negative terminal of the power supply, the Vout terminal of the temperature controller is connected to the positive terminal of the circulating pump motor, and the negative terminal of the circulating pump motor is connected to the negative terminal of the power supply. When switch K3 is closed, the temperature controller is powered on and operates. When the temperature of the top temperature probe 6 or the cylinder temperature probe 18 is lower than 5°C (variable), the temperature controller closes, the circulating pump 15 starts, and heat exchange begins. When the temperature of the top temperature probe 6 or the cylinder temperature probe 18 reaches 20°C (variable), the temperature controller disconnects, and the circulating pump 15 stops. This process repeats to maintain the temperature at the float exhaust valve and the ball valve between 5 and 20°C, thus achieving the antifreeze function.

[0061] Furthermore, in this embodiment, the Vin and Vout terminals of the thermostat 21 are connected to switch K6, which acts as a bypass when the thermostat fails. When the thermostat fails or when the circulating pump 15 needs to run continuously, switch K6 can be closed to keep the circulating pump 15 running continuously.

[0062] Example 2

[0063] This invention also provides a control method for a pressurized pipeline CNC dual exhaust device with an air intake function, the method comprising the following steps:

[0064] (1) Power on, the exhaust device starts to run, when the gas in the pipeline reaches a certain amount, the ball in the ball exhaust valve drops, and the automatic exhaust starts; when the amount of gas is too large, the liquid level in the four-way drops below the liquid level switch fork body 3-1, the liquid level switch 3 sends a high level signal;

[0065] (2) The high level signal sent by the liquid level switch 3 is transmitted to the IO end of the OHR-PR10 logic controller through the cable, the IO is closed, the T00 timer in the logic controller starts timing, and outputs the Q1 closing instruction, the gas accumulation indicator HL2 is bright, and the gas accumulation alarm signal is sent; when the cumulative time of the T00 timer exceeds 10 min (which can be arbitrarily set), the Q0 closing instruction is sent, the micro electric ball valve is opened, the automatic exhaust indicator HL1 is bright, and the exhaust through the exhaust pipe 14 starts;

[0066] (3) When the air in the pipeline is exhausted, the liquid level switch fork body 3-1 is covered by the liquid, the low level signal sent by the liquid level switch 3 is transmitted to the IO end of the OHR-PR10 logic controller through the cable, the IO is disconnected, the logic controller sends the Q0 opening and Q1 opening instructions, the gas accumulation indicator HL2 is extinguished, the micro electric ball valve is automatically closed, and the automatic exhaust indicator HL1 is extinguished, which is repeated in this way.

[0067] In this embodiment, when the automatic exhaust indicator HL1 and the gas accumulation indicator HL2 are in the bright state for a long time, the spring reset ball valve can also be manually controlled to make the gas in the pipeline exhaust through the spring reset ball valve.

[0068] In addition, the exhaust device provided in this embodiment can also realize self-suction function. When the water in the pipeline stops, the liquid level in the pipeline drops, the pipeline generates negative pressure, at this time the ball exhaust valve opens quickly to suck air; due to the drop of the liquid level in the pipeline, the high level signal sent by the liquid level switch is transmitted to the IO end of the OHR-PR10 logic controller through the cable, the T00 timer in the logic controller starts timing, and when the cumulative time of the T00 timer exceeds the set value, the micro electric ball valve is automatically opened to allow the pipeline to realize double-way air suction, avoiding pipeline rupture; when the exhaust device is used to realize automatic air suction function, the cumulative time of the T00 timer can be set to a short time, generally not more than 1 min.

[0069] When the liquid level switch 3 works normally, the output states of the 2 and 4 pins of the liquid level switch 3 are opposite, the logic controller sends the Q2 opening instruction, and the sensor fault indicator HL3 is extinguished; when the liquid level switch 3 fails, the 2 and 4 pins of the liquid level switch 3 have no output, the logic controller sends the Q2 closing instruction, and the sensor fault indicator HL3 is bright.

[0070] The controller in the embodiment has a counter C00 and a counter C01, through which the automatic exhaust times and the time length of each exhaust can be recorded; when the counter C00 needs to be reset, the K4 switch can be closed, the I6 terminal of the logic controller outputs high level, and the counter C00 is reset to display 0000000; when the counter C01 needs to be reset, the K5 switch can be closed, the I7 terminal of the logic controller outputs high level, and the counter C01 is reset to display 0000000.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the embodiments of the present application.

Claims

1. A numerical control double exhaust device for a pressurized pipeline with an air suction function, characterized in that, The exhaust device comprises a four-way, an exhaust valve, a liquid limit switch, a micro electric ball valve, an exhaust pipe, a controller, a power supply, a spring reset ball valve, an air accumulation indicator lamp connected with the controller, an automatic exhaust indicator lamp, a sensor fault indicator lamp; wherein the four-way is communicated with a pressure pipeline; the exhaust valve is installed on the upper side of the four-way; the liquid limit switch is installed on one side of the four-way, and the fork body of the liquid limit switch is inserted into the four-way; the micro electric ball valve is installed on the other side of the four-way; the exhaust pipe is connected with the micro electric ball valve; the controller is used for controlling the micro electric ball valve to open or close according to the data monitored by the liquid limit switch; and the power supply is used for power supply. The spring reset ball valve is a manual ball valve, and the spring reset ball valve and the micro electric ball valve are both communicated with the four-way, and are both normally closed ball valves. The air accumulation indicator lamp is used for sending an air accumulation alarm signal, and the air accumulation indicator lamp is bright when the liquid limit switch cannot monitor data; the automatic exhaust indicator lamp is used for prompting whether it is automatic exhaust, and the automatic exhaust indicator lamp is bright after the micro electric ball valve is opened; and the sensor fault indicator lamp is used for prompting whether the liquid limit switch has a fault, and the sensor fault indicator lamp is bright when the liquid limit switch has no data output. The controller is a Hongrun OHR-PR10 logic controller, the L (+) terminal of the controller and the double lead terminal left end of Q1 are connected with the positive pole of the power supply through the switch K1; the N (-) terminal is connected with the negative pole of the power supply; the I0 terminal is connected with the 2 pin of the liquid limit switch through a cable, and the I1 terminal is connected with the 4 pin of the liquid limit switch through a cable; the single lead terminal of Q0 is connected with the positive pole of the power supply through the switch K2; one way of the double lead terminal of Q0 is connected with the positive pole of the micro electric ball valve, and the other way is connected with the positive pole of the automatic exhaust indicator lamp HL1; the single lead terminal of Q1 is connected with the positive pole of the air accumulation indicator lamp HL2, the right end of the double lead terminal of Q1 is connected with one end of the Q2 terminal of the controller, and the other end of the Q2 terminal is connected with the positive pole of the sensor fault indicator lamp HL3; the I6 terminal and the I7 terminal are connected with the positive pole of the power supply through the switches K4 and K5; The 1 pin of the liquid limit switch is connected with the positive pole of the power supply through the switch K1, and the 3 pin of the liquid limit switch is connected with the negative pole of the power supply; the negative pole of the micro electric ball valve, the negative pole of the automatic exhaust indicator lamp HL1, the negative pole of the air accumulation indicator lamp HL2 and the negative pole of the sensor fault indicator lamp HL3 are connected with the negative pole of the power supply.

2. The numerical control double exhaust device with a suction function for a pressurized pipeline according to claim 1, characterized in that, The exhaust device further comprises an anti-freezing assembly, a top temperature probe and a barrel body temperature probe; wherein the heating pipeline of the anti-freezing assembly is arranged on the exhaust valve, the spring reset ball valve and the micro electric ball valve, and is used for heating the exhaust valve, the spring reset ball valve and the micro electric ball valve; the top temperature probe is fixed at the exhaust port of the exhaust valve, and the barrel body temperature probe is fixed on the side wall of the exhaust valve; the top temperature probe and the barrel body temperature probe are connected with a temperature controller; and the temperature controller is used for controlling the circulating pump of the anti-freezing assembly to open or close according to the data monitored by the top temperature probe and the barrel body temperature probe.

3. The numerical control double exhaust device with a suction function for a pressurized pipeline according to claim 1, characterized in that, The four-way is an equal-diameter four-way, the lower surface of the equal-diameter four-way is connected with a flange through a connecting piece, the flange is fixedly installed at the highest point of the pipeline exhaust port of the pressurized pipeline, so that the pressurized pipeline and the equal-diameter four-way form a communication structure; an anti-blowing plug pair is arranged above the equal-diameter four-way, and the equal-diameter four-way and the exhaust valve form a communication structure through the anti-blowing plug pair; one side of the equal-diameter four-way close to the ball valve is connected with a three-way through a connecting piece, the upper portion of the three-way is connected with a spring return ball valve through a connecting piece, and the other end of the three-way is connected with a micro electric ball valve through a connecting piece; the inside of the anti-blowing plug pair is provided with a partition plate, a throttle hole is formed in the partition plate, the throttle hole is arranged in a staggered manner with the exhaust port of the float ball exhaust valve, and the diameter of the throttle hole is smaller than that of the exhaust port at the top of the exhaust valve.

4. The numerical control double exhaust device with a suction function for a pressurized pipeline according to claim 3, characterized in that, The exhaust valve is a float ball type exhaust valve or a composite type exhaust valve; the connecting piece comprises a pair of wires; the bottom of the exhaust pipe is provided with a drain port, the end of the handle of the spring return ball valve is fixedly connected with a pull line ring, the pull line ring is connected with a soft rope, and the spring return ball valve is started by pulling the soft rope.

5. The numerical control double exhaust device with pressure pipeline and air suction function according to claim 2, characterized in that, The anti-freezing assembly comprises a heat exchanger, a ball valve heating pipeline, a barrel heating pipeline, a top heating pipeline, a circulating pump and a circulating liquid tank; the heat exchanger is closely attached to the hot pressurized pipeline, and the outlet of the heat exchanger is connected with the inlet of the ball valve heating pipeline; the ball valve heating pipeline is arranged around the spring return ball valve and the micro electric ball valve, and the outlet of the ball valve heating pipeline is connected with the inlet of the barrel heating pipeline; the barrel heating pipeline is wound around the barrel of the exhaust valve, and the outlet of the barrel heating pipeline is connected with the inlet of the top heating pipeline; the top heating pipeline is arranged at the top end of the exhaust valve, and the outlet of the top heating pipeline is connected with the inlet of the circulating liquid tank; the circulating liquid tank is filled with anti-freezing liquid, and the inlet of the circulating pump is connected with the circulating liquid tank; the outlet of the circulating pump is connected with the inlet of the heat exchanger.

6. The numerical control double exhaust device with a suction function for a pressurized pipeline according to claim 5, characterized in that, The heat exchanger is a curved surface heat exchanger, the radius Rq of the curved surface heat exchanger is consistent with the radius Rg of the pressurized pipeline, and heat-conducting grease is coated on the joint surface of the curved surface heat exchanger and the pressurized pipeline; the installation position of the circulating pump is higher than that of the curved surface heat exchanger; the temperature controller is connected with the top temperature probe and the barrel temperature probe through cables, the Vin end of the temperature controller is connected with the positive electrode of the power supply through a switch K3, the negative electrode of the temperature controller is connected with the negative electrode of the power supply, the Vout end of the temperature controller is connected with the positive electrode of the circulating pump motor, and the negative electrode of the circulating pump motor is connected with the negative electrode of the power supply; the Vin end and the Vout end of the temperature controller are connected with the switch K6.

7. The control method of the numerical control double exhaust device with the function of air suction for the pressurized pipeline according to claim 1, characterized in that, The method comprises the following steps: (1) power-on starting, the exhaust device starts to run, when the accumulated gas in the pipeline reaches a certain amount, the float ball in the float ball exhaust valve descends, and automatic exhaust starts; when the amount of accumulated gas is too large, the liquid level in the four-way drops below the liquid limit switch fork, and the liquid limit switch sends a high level; (2) The high level signal from the liquid level switch is transmitted to the IO port of the OHR-PR10 logic controller through the cable, the IO is closed, the T00 timer inside the logic controller starts timing, and the Q1 closing instruction is output, the gas accumulation indicator HL2 is on, and the gas accumulation alarm signal is sent out; when the cumulative time of the T00 timer exceeds the set value, the Q0 closing instruction is output, the micro electric ball valve is opened, the automatic exhaust indicator HL1 is on, and the exhaust through the exhaust pipe starts; (3) When the air in the pipeline is exhausted and the liquid level switch fork is covered by the liquid, the low level signal from the liquid level switch is transmitted to the IO port of the OHR-PR10 logic controller through the cable, the IO is disconnected, the logic controller outputs the Q0 and Q1 opening instructions, the gas accumulation indicator HL2 is off, the micro electric ball valve is automatically closed, and the automatic exhaust indicator HL1 is off, which repeats the cycle; (4) When the automatic exhaust indicator HL1 and the gas accumulation indicator HL2 are on for a long time, manually control the spring return ball valve to make the gas in the pipeline exhaust through the spring return ball valve; (5) When the water in the pipeline stops, the liquid level in the pipeline drops, the pipeline generates negative pressure, at this time the float ball exhaust valve opens quickly to inhale air; at the same time, the high level signal from the liquid level switch is transmitted to the IO port of the OHR-PR10 logic controller through the cable, the T00 timer inside the logic controller starts timing, and when the cumulative time of the T00 timer exceeds the set value, the micro electric ball valve is automatically opened, and the pipeline realizes double-way air suction.

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