Liquid level detection device of coke oven flue inspection well

Abstract

The utility model relates to a liquid level detection device of a coke oven flue inspection well, which is characterized in that the top end of a stand column is vertically and fixedly connected with a top concrete foundation layer, the bottom end of the stand column is vertically and fixedly connected with a bottom concrete foundation layer, and liquid level switches comprise a liquid level switch I, a liquid level switch II and a liquid level switch IV; the stand column is sequentially provided with a first liquid level switch, a second liquid level switch, a third liquid level switch and a fourth liquid level switch from top to bottom, the first liquid level switch is used for detecting the ultrahigh liquid level of the inspection well, the second liquid level switch is used for detecting the high liquid level of the inspection well, the third liquid level switch is used for detecting the low liquid level of the inspection well, and the fourth liquid level switch is used for detecting the ultralow liquid level of the inspection well. The drainage pump is connected with a drainage pipe. The pull rod type liquid level switch has the advantages that the pull rod type liquid level switch is fixed to the metal stand column through the metal fixing ring, and the problems that a flexible wire is aged and longitudinally deformed after being stretched for a long time and the liquid level switch moves when floating or drooping are solved; the included angle between the adjacent liquid level switches is alpha, so that the problem of physical collision of the adjacent liquid level switches in the vertical direction is prevented.

Description

Technical Field

[0001] The utility model relates to a liquid level detection device for a coke oven flue inspection well. Background Art

[0002] Coke ovens use blast furnace gas or coke oven gas to heat coal through high-temperature dry distillation. The gas mixes with air and burns to produce a large amount of waste gas. The waste gas is collected through the flues on both sides or one side of the coke oven. The collected waste gas is then led to the chimney through the outdoor coke oven main flue and discharged into the atmosphere. Each coke oven has a corresponding coke oven main flue leading to the chimney. Each coke oven main flue is equipped with a flue inspection well. Figure 1 During the discharge of collected exhaust gas, water vapor and condensed water will be entrained. The water vapor and condensed water generated by the flue gas in the main flue of the coke oven will flow from the main flue of the coke oven into the bottom of the flue inspection well through the flue drainage pipe. The existing flue inspection wells are inspected manually and the accumulated water in the inspection wells is removed manually. Due to the lax or untimely manual inspection, the accumulated water often cannot be discharged in time, resulting in excessive condensed water collected in the flue inspection wells. The liquid level rises to a certain height and exceeds the horizontal elevation of the connecting channel between the main flue of the coke oven and the flue inspection well. The water vapor and condensed water generated by the flue gas in the main flue of the coke oven will not be discharged into the flue inspection well. Even the high liquid level water in the flue inspection well will flow back into the main flue of the coke oven, affecting the normal removal of the coke oven exhaust gas, and further affecting the normal working state of the coke oven, and even posing a threat to the coking production and the safety of the coke oven body. Summary of the Invention

[0003] The utility model aims to provide a liquid level detection device for a coke oven flue inspection well, which does not require manual inspection or manual drainage of accumulated water and is stable and reliable.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A liquid level detection device for a coke oven flue inspection well, the inspection well comprising a top concrete foundation layer and a bottom concrete foundation layer, comprising a liquid level switch, a column, a drainage pump, and a control unit, the top end of the column being vertically fixedly connected to the top concrete foundation layer, and the bottom end of the column being vertically fixedly connected to the bottom concrete foundation layer, the liquid level switch comprising liquid level switch 1 to liquid level switch 4, the columns being provided with liquid level switch 1, liquid level switch 2, liquid level switch 3, and liquid level switch 4 in sequence from top to bottom, liquid level switch 1 being used to detect an ultra-high liquid level in the inspection well, liquid level switch 2 being used to detect a high liquid level in the inspection well, liquid level switch 3 being used to detect a low liquid level in the inspection well, and liquid level switch 4 being used to detect an ultra-low liquid level in the inspection well, the drainage pump being connected to a drainage pipe, and the liquid level switch and the drainage pump being connected to the control unit.

[0006] The liquid level switch includes a fixed ring, a float, and a float connecting rod. The fixed ring is fixedly connected to the column, one end of the float connecting rod is hinged to the fixed ring, and the other end of the float connecting rod is fixedly and sealedly connected to the float.

[0007] The liquid level switch includes a float, and the column is a metal column. The metal column is fixedly connected with multiple fixing rings from top to bottom, and each float is connected to a corresponding fixing ring.

[0008] The float is set away from the column.

[0009] The columns include column one and column two, column one and column two are parallel to each other, one side of column one is fixedly connected to liquid level switch one and liquid level switch three, and the other side of column two is fixedly connected to liquid level switch two and liquid level switch four, and the angle α between adjacent liquid level switches ranges from 180°≥α≥90°.

[0010] It also includes a main circuit, which is connected to a control unit. The control unit includes a CPU module. The liquid level switch and the drainage pump are connected to the CPU module through ports.

[0011] The control unit also includes a communication module 1 and a wireless communication module. The CPU module and the communication module 1 are connected through a communication port. The communication module 1 is connected to the wireless communication module through a port. The wireless communication module is wirelessly connected to the cloud server. The cloud server saves data information to the cloud management center through communication. The cloud management center is connected to the mobile device through communication.

[0012] The main circuit includes an overheating relay, a contactor, and a circuit breaker which are connected to the drainage pump in sequence. The digital input port of the CPU module is connected in series with the normally open auxiliary contacts of the overheating relay and the normally open auxiliary contacts of the contactor respectively. The digital output port of the CPU module is connected to the relay coil, and the normally open contact of the relay is connected to the coil of the contactor.

[0013] The control unit is PLC.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The pull-rod type liquid level switch is fixed on the metal column with a metal fixing ring. The liquid level switch is easy to fix, repair and replace. The fixing ring is firmly fixed, avoiding the aging and longitudinal deformation of the soft wire due to long-term stretching and the displacement of the liquid level switch when it floats up or droops;

[0016] 2. Column 1 and column 2 are parallel to each other. Liquid level switch 1 and liquid level switch 3 are fixedly connected to one side of column 1, and liquid level switch 2 and liquid level switch 4 are fixedly connected to the other side of column 2. The included angle α between adjacent liquid level switches is in the range of 180°≥α≥90°, which prevents the problem of physical collision between adjacent liquid level switches in the vertical direction. The structure is simple and easy to implement.

[0017] 3. The metal columns are fixed on the cement foundation for maintenance, and they do not deform vertically or horizontally, thus avoiding the aging problem of the soft wires that go up and down;

[0018] 4. The CPU module and communication module 1 are connected through the communication port, and the communication module 1 is connected to the wireless communication module through the port. The operator establishes a network connection with the wireless communication module through a mobile phone or PC, and can monitor the status data information of the liquid level switch and the drainage pump at any time, receive data information sent by the cloud management center, and control the start and stop of drainage at any time, which is simple to maintain and saves time and effort;

[0019] 5. Operators can start and stop the drainage pump through the touch screen, which is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a bird's-eye view of the flue inspection well.

[0021] Figure 2 This is a schematic diagram of the liquid level in the flue inspection well in direction A.

[0022] Figure 3 This is a schematic diagram of liquid level detection of a soft-wire fixed soft-wire type liquid level switch.

[0023] Figure 4 This is a schematic diagram of liquid level detection for a column-fixed pull-rod type liquid level switch.

[0024] Figure 5 This is a schematic diagram of liquid level detection for a column-fixed soft-wire liquid level switch.

[0025] Figure 6 This is a schematic diagram of the principle of the liquid level detection device in the coke oven flue inspection well.

[0026] In the figure: 1-drain pump 2-drain pipe 3-flue drain pipe 4-pull rod type float liquid level switch four 5-pull rod type float liquid level switch three 6-pull rod type float liquid level switch two 7-pull rod type float liquid level switch one 8-float connecting rod 9-metal fixing seat; 10-column 11-flexible wire type float liquid level switch four 12-flexible wire type float liquid level switch three 13-flexible wire type float liquid level switch two 14-flexible wire type float liquid level switch one 15-flexible wire 16-metal fixing column 17-upper and lower flexible wires. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0028] The following examples are implemented under the premise of the technical solution of the present utility model, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0029] [Example 1]

[0030] In a coking plant, the floor of the main flue of the coke oven is 7 meters deep from the ground, and the floor of the flue inspection well is 9 meters deep from the ground. The water at the bottom of the flue inspection well is located below the elevation of the main flue of the coke oven. The depth of the building structure for water accumulation in the flue inspection well is 2 meters. After the first renovation, the accumulated water is discharged outward through the flue drainage pump 1 according to the height of the water level in the flue inspection well. Figure 2 , Liquid level detection device for coke oven flue inspection well, see Figure 3 The liquid level in the flue inspection well is detected by the float liquid level switch, and the flue drainage pump 1 starts and stops drainage according to the detected liquid level. The inspection well includes a top concrete foundation layer and a bottom concrete foundation layer, including a liquid level switch, an upper and lower flexible wire 17, and a drainage pump 1. The top of the upper and lower flexible wire 17 is vertically fixedly connected to the top concrete foundation layer, and the bottom of the upper and lower flexible wire 17 is vertically fixedly connected to the bottom concrete foundation layer. The liquid level switch includes liquid level switch 1 to liquid level switch 4. The upper and lower flexible wires 17 are fixedly connected from top to bottom with liquid level switch 14, liquid level switch 2 13, and liquid level. Switch three 12, liquid level switch four 11, liquid level switch one 14 is used to detect the ultra-high liquid level (HH) of the inspection well, liquid level switch two 13 is used to detect the high liquid level (H) of the inspection well, liquid level switch three 12 is used to detect the low liquid level (L) of the inspection well, liquid level switch four 11 is used to detect the ultra-low liquid level (LL) of the inspection well, the drainage pump 1 is connected to the drainage pipe 2; the liquid level switch adopts a soft wire float liquid level switch, the soft wire float liquid level switch includes a float, a silicone soft wire 15, and a fixed column, one end of the silicone soft wire 15 is connected to the soft wire, and the other end of the silicone soft wire 15 is fixedly and sealedly connected to the float.

[0031] During use, there are the following problems:

[0032] 1. When there is no water accumulation at the bottom of the flue inspection well, the four float level switches all sag due to gravity, and the magnetic switch contacts in the floats are in the disconnected state; when the flue gas in the main flue of the coke oven generates condensed water that continues to increase and is introduced into the bottom of the flue inspection well, the level of the accumulated water collected in the flue inspection well begins to rise from the bottom plane. As the liquid level rises and reaches the ultra-low liquid level (LL), the float of the float level switch for ultra-low liquid level (LL) detection rises due to the rising liquid level, while the float level switch for low liquid level (L) detection remains in the normal state of sag due to gravity. After a period of use, it was found that: due to the aging and longitudinal deformation of the soft wire caused by long-term stretching, the lateral deflection was caused. The liquid level switch was connected to the vertical soft wire through a silicone soft connection. When the liquid level switch floated or drooped, it shifted;

[0033] 2. When the liquid level continues to rise and exceeds the low liquid level (L) and the high liquid level (H), the three float level switches detecting the ultra-low liquid level (LL) and the low liquid level (L) and high liquid level (H) all float upward due to buoyancy, while the float level switch detecting the ultra-high liquid level (HH) remains in a normal state and hangs down due to gravity. Since the upper and lower distances between the high liquid level (H) and the ultra-high liquid level (HH) are small, the two float level switches are in opposite positions, which will produce a physical collision in the vertical direction. When the water level in the flue inspection well continues to rise and exceeds the ultra-high liquid level (HH), the four float level switches all float upward.

[0034] 3. The liquid level in the flue inspection well begins to drop after drainage. As the liquid level drops to the high liquid level (H), the float level switch for detecting the ultra-high liquid level (HH) drops due to gravity, while the float level switch for detecting the high liquid level (H) still floats upward due to buoyancy. The upper and lower distances between the ultra-high liquid level (HH) and the high liquid level (H) are small, and the two float level switches are in opposite positions, resulting in a physical collision in the vertical direction.

[0035] 4. When the liquid level in the flue inspection well continues to drop, falling below the high liquid level (H) and low liquid level (L) and reaching the ultra-low liquid level (LL), the float level switch for low liquid level (L) detection is in normal state and hangs down by gravity, while the float level switch for ultra-low liquid level (LL) detection floats upward due to buoyancy. Since the upper and lower distances between the low liquid level (L) and ultra-low liquid level (LL) liquid levels are small, the two float level switches are in opposite positions, and a physical collision will occur in the vertical direction.

[0036] In response to the above problems, the coking plant made rectifications and replaced the soft wire 10 with a metal column 10. The metal column 10 is fixedly connected with multiple fixing rings from top to bottom. Each float is connected to the corresponding fixing ring. The float is set away from the column 10. Figure 4 .

[0037] Plan 1 is as follows:

[0038] One side of the column 10 is fixedly connected with a pull-rod liquid level switch 1 7 and a pull-rod liquid level switch 3 5, and the other side of the column including the column 10 is fixedly connected with a pull-rod liquid level switch 2 6 and a pull-rod liquid level switch 4 4; the range of the fixed angle α of adjacent liquid level switches is: 180°≥α≥90°, that is, the ultra-high liquid level (HH) float liquid level switch and the high liquid level (H) float liquid level switch, as well as the low liquid level (L) float liquid level switch and the ultra-low liquid level (LL) float liquid level switch, are respectively arranged and fixed on the column 10 with an angle α of 180°≥α≥90 in the top view; the level switches all maintain the original liquid level detection function of the flue inspection well, solving the on-site Figure 3The liquid level detection method solves the problem of physical collision between adjacent liquid level switches in the vertical direction; the pull-rod float liquid level switch includes a metal fixing ring 9, a float, and a float connecting rod 8. The fixing ring 9 is fixedly connected to the column 10, one end of the float connecting rod 8 is hinged to the fixing ring 9, and the other end of the float connecting rod 8 is fixedly and sealedly connected to the float.

[0039] Working process: As the water level at the bottom of the flue manhole increases, the float level switch rises due to buoyancy, closing the switch contacts. When the water level drops, the float level switch sags downward due to gravity in the atmosphere, causing the switch contacts to switch from closed to open. As the water level in the flue manhole rises again, the float level switch rises again due to buoyancy, closing the switch contacts again. The fixed horizontal elevation of the float level switch is determined by the alarm level in the flue manhole and the level at which drainage pump 1 is started and stopped.

[0040] Option 2 is as follows:

[0041] See Figure 5 , using columns including column 10, column including column 10 on one side fixedly connected with soft wire liquid level switch 14, soft wire liquid level switch 3 13, column including column 10 on the other side fixedly connected with soft wire liquid level switch 2 12, soft wire liquid level switch 4 11; the range of the fixed angle α of adjacent liquid level switches is: 180°≥α≥90°, that is, the ultra-high liquid level (HH) float liquid level switch and the high liquid level (H) float liquid level switch, as well as the low liquid level (L) float liquid level switch and the ultra-low liquid level (LL) float liquid level switch, are respectively arranged and fixed on the column 10 with an angle α of 180°≥α≥90 in the top view; the liquid level switches all maintain the original liquid level detection function of the flue inspection well, solving the on-site Figure 3 The liquid level detection method has the problem of physical collision between adjacent liquid level switches in the vertical direction; the liquid level switch adopts a soft wire float liquid level switch, which includes a float 14, a silicone soft wire 15, and a metal fixed column 16. The metal fixed column 16 is fixedly connected to the column 10, one end of the silicone soft wire 15 is fixedly connected to the fixed column 16, and the other end of the silicone soft wire 15 is fixedly and sealedly connected to the float 14.

[0042] [Example 2]

[0043] In this embodiment, a liquid level detection device for a coke oven flue inspection well is the same as that in embodiment 1, with a main circuit and a PLC added thereto.

[0044] The PLC includes a CPU module, communication module 1, communication module 2, communication module 3, a wireless communication module, and a touch screen. The CPU module, communication module 1, communication module 2, communication module 3, and the touch screen are connected through a communication port. The communication module 1 is connected to the wireless communication module through a port, and the communication module 2 is connected to the touch screen through a port. Communication module 3 is connected to the engineer station of the remote control center, so that the PLC data is transmitted to the remote control center for convenient centralized management. The wireless communication module is wirelessly connected to the cloud server, and the cloud server saves data information to the cloud management center through communication. The cloud management center is connected to mobile devices through communication; the wireless communication module is any one of a 5G communication module, a 4G communication module, a Bluetooth module, a WiFi module, a GSM module, a CDMA module, a CDMA module, a WCDMA module, a TD-SCDMA module, a Zigbee module, and a LoRa module, or a combination of any several of them. The operator establishes a network connection with the wireless communication module through a mobile phone or a PC to monitor the status data information of the liquid level switch and the drainage pump 1 in real time. The main circuit includes an overheating relay FR, a contactor KM, and a circuit breaker Q, which are connected to the drainage pump 1 in sequence. The digital input port of the CPU module is connected in series with the normally open auxiliary contacts of the overheating relay FR and the normally open auxiliary contacts of the contactor KM, respectively. The digital output port of the CPU module is connected to the coil of the relay KA, and the normally open contact of the relay KA is connected to the coil of the contactor KM.

[0045] The utility model relates to a pull-rod type liquid level switch which is fixed on a metal column by a metal fixing ring. The liquid level switch is easy to fix, repair and replace. The fixing ring is firmly fixed, which avoids the problem of aging and longitudinal deformation of the soft wire due to long-term stretching and displacement of the liquid level switch when it floats up or droops. The first column and the second column are parallel to each other. The first and third liquid level switches are fixedly connected on one side of the first column, and the second and fourth liquid level switches are fixedly connected on the other side of the second column. The range of the angle α between adjacent liquid level switches is 180°≥α≥90°, which prevents the problem of physical collision between adjacent liquid level switches in the vertical direction. The structure is simple and easy to implement; the metal column is fixed on the maintenance cement foundation, and it does not deform longitudinally and transversely, avoiding the aging problem of the soft wires that stand up and down; the CPU module and communication module 1 are connected through the communication port, and the communication module 1 is connected to the wireless communication module through the port. The operator establishes a network connection with the wireless communication module through a mobile phone or PC, and can monitor the status data information of the liquid level switch and the drainage pump at any time, receive data information sent by the cloud management center, and control the start and stop of drainage at any time. The maintenance is simple, saving time and effort; the operator can start and stop the drainage pump individually through the touch screen, which is simple and convenient to operate.

Claims

1. A liquid level detection device for a coke oven flue inspection well, the inspection well comprising a top concrete foundation layer and a bottom concrete foundation layer, characterized in that: It includes a liquid level switch, a column, a drainage pump, and a control unit. The top of the column is vertically fixedly connected to the top concrete foundation layer, and the bottom of the column is vertically fixedly connected to the bottom concrete foundation layer. The liquid level switch includes liquid level switch 1 to liquid level switch 4. The column is provided with liquid level switch 1, liquid level switch 2, liquid level switch 3, and liquid level switch 4 from top to bottom. Liquid level switch 1 is used to detect ultra-high liquid level in the inspection well, liquid level switch 2 is used to detect high liquid level in the inspection well, liquid level switch 3 is used to detect low liquid level in the inspection well, and liquid level switch 4 is used to detect ultra-low liquid level in the inspection well. The drainage pump is connected to the drainage pipe, and the liquid level switch and drainage pump are connected to the control unit.

2. The liquid level detection device for a coke oven flue inspection well according to claim 1, characterized in that: The liquid level switch includes a fixed ring, a float, and a float connecting rod. The fixed ring is fixedly connected to the column, one end of the float connecting rod is hinged to the fixed ring, and the other end of the float connecting rod is fixedly and sealedly connected to the float.

3. The liquid level detection device for a coke oven flue inspection well according to claim 1, characterized in that: The liquid level switch includes a float, and the column is a metal column. The metal column is fixedly connected with a plurality of fixing rings from top to bottom, and each float is connected to a corresponding fixing ring.

4. A liquid level detection device for a coke oven flue inspection well according to claim 2 or 3, characterized in that: The float is arranged away from the column.

5. The liquid level detection device for a coke oven flue inspection well according to claim 1, characterized in that: The columns include column 1 and column 2, column 1 and column 2 are parallel to each other, one side of column 1 is fixedly connected to liquid level switch 1 and liquid level switch 3, and the other side of column 2 is fixedly connected to liquid level switch 2 and liquid level switch 4, and the angle α between adjacent liquid level switches ranges from 180°≥α≥90°.

6. The liquid level detection device for a coke oven flue inspection well according to claim 1, characterized in that: It also includes a main circuit, which is connected to a control unit. The control unit includes a CPU module. The liquid level switch and the drainage pump are connected to the CPU module through ports.

7. The liquid level detection device for a coke oven flue inspection well according to claim 6, characterized in that: The control unit also includes a communication module 1 and a wireless communication module. The CPU module and the communication module 1 are connected through a communication port. The communication module 1 is connected to the wireless communication module through a port. The wireless communication module is wirelessly connected to the cloud server. The cloud server saves data information to the cloud management center through communication, and the cloud management center is connected to the mobile device through communication.

8. The liquid level detection device for a coke oven flue inspection well according to claim 6, characterized in that: The main circuit includes an overheating relay, a contactor, and a circuit breaker connected to the drainage pump in sequence. The digital input port of the CPU module is connected in series with the normally open auxiliary contact of the overheating relay and the normally open auxiliary contact of the contactor respectively. The digital output port of the CPU module is connected to the relay coil, and the normally open contact of the relay is connected to the coil of the contactor.

9. The liquid level detection device for a coke oven flue inspection well according to claim 1, characterized in that: The control unit is a PLC.

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