A liquid leakage detection device for a heating furnace fire tube

Abstract

The present invention discloses a liquid leakage detection device for a heating furnace fire tube, which includes a submersible level transmitter and a bracket. The submersible level transmitter includes a level transmitter body, a level probe, and a pressure guiding tube connecting the transmitter body and the level probe. The level transmitter body is fixed outside the heating furnace fire tube through the bracket, the pressure guiding tube penetrates through the heating furnace fire tube, and the level probe is arranged at the lower part inside the heating furnace fire tube. The present invention detects whether there is liquid at the lower part of the fire tube through the level probe. After sensing the liquid, the level transmitter body transmits the signal to the main control cabinet through a circuit for fire extinguishing operation, so as to quickly extinguish the fire inside the fire tube.

Description

Technical Field

[0001] The present invention relates to an oilfield heating furnace, and particularly to a liquid leakage detection device for a fire tube of a heating furnace. Background Art

[0002] The oilfield heating furnace, abbreviated as a fire tube furnace, is a widely used heating device in the oilfield for heating the multiphase mixture in oilfield production. The multiphase mixture includes oil, water and other impurities. The oilfield heating furnace includes a furnace body and a fire tube. Among them, the fire tube is the main heating device of the heating furnace, including a fire tube, a burner and a smoke tube. The burner is installed outside the furnace body at one end of the fire tube. Fuel is ignited in the burner at one end of the fire tube and sprayed into the fire tube for combustion. The multiphase mixture outside the fire tube exchanges heat convectively with the outer wall of the fire tube to achieve oil-water separation. However, if the fire tube is burned through by fire, the multiphase mixture will flow into the fire tube, causing a fire. At present, there is no special detection device for liquid leakage of the fire tube of the oilfield heating furnace, and it cannot quickly detect the liquid leakage of the fire tube, and the fire extinguishing reaction to the liquid leakage of the fire tube is slow. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a liquid leakage detection device for a fire tube of a heating furnace that can quickly detect the liquid leakage of the fire tube so as to quickly extinguish the fire in the fire tube.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is a liquid leakage detection device for a fire tube of a heating furnace, including a submersible level transmitter and a bracket. The submersible level transmitter includes a level transmitter body, a level probe and a pressure guiding tube connecting the transmitter body and the level probe. The level transmitter body is fixed outside the fire tube of the heating furnace through the bracket, the pressure guiding tube passes through the fire tube of the heating furnace, and the level probe is arranged at the lower part inside the fire tube of the heating furnace.

[0005] For the above-mentioned liquid leakage detection device, the fire tube of the heating furnace includes a burner, and the burner is located at the rear end of the fire tube of the heating furnace; the bracket is fixed below the burner or the heating furnace, and the pressure guiding tube passes through the housing of the burner or directly enters the heating furnace.

[0006] For the above-mentioned liquid leakage detection device, the burner or the heating furnace housing includes a jacket. The lower part of the annular rear wall of the jacket includes a pressure guiding tube hole and a plurality of threaded holes; a fixing ring is installed in the pressure guiding tube hole, and the pressure guiding tube passes through the inner hole of the fixing ring and enters the housing of the burner or the jacket of the heating furnace; the front plate of the bracket is fixed on the annular rear wall of the jacket through a plurality of screws.

[0007] For the above-mentioned liquid leakage detection device, the fixing ring is a three-point heat reduction type fixing ring. The outer periphery of the three-point heat reduction type fixing ring includes three protruding edges arranged separately along the circumferential direction, and the three protruding edges of the three-point heat reduction type fixing ring are supported by three points of the pressure guiding tube hole.

[0008] The liquid leakage detection device described above, the bracket includes a bottom plate. The bottom plate includes mounting holes; the submersible level transmitter includes a nut and two heat insulation pads. The upper end of the level transmitter body includes a threaded shaft head. The threaded shaft head passes through the mounting holes of the bottom plate, and the nut is screwed onto the upper end of the threaded shaft head; the two heat insulation pads are sleeved on the threaded shaft head, one is located below the bottom plate, and the other is located above the bottom plate; the aperture of the mounting hole is larger than the diameter of the threaded shaft head, and there is a heat insulation gap between the threaded shaft head and the mounting hole.

[0009] The liquid leakage detection device described above, the bracket includes an arc-shaped top plate, and the mounting holes of the bottom plate are located at the rear of the bracket; the top plate serves as a heat insulation plate to cover the pressure guide pipe outside the burner and the level transmitter body above.

[0010] The liquid leakage detection device described above, the outer surface of the bracket facing the burner is sprayed with nano heat insulation paint.

[0011] The liquid leakage detection device described above, the pressure guide pipe led out from the upper end of the level transmitter body forms a flat and long loop with the long axis in the horizontal direction and then enters the burner housing or the heating furnace housing.

[0012] The liquid leakage detection device described above, the pressure guide pipe led out from the upper end of the level transmitter body forms a plurality of spiral loops and then enters the burner housing or the heating furnace housing.

[0013] In the present invention, the liquid level probe is used to detect whether there is liquid at the lower part of the fire tube. After detecting liquid, the level transmitter body transmits the signal to the main control cabinet through the circuit for fire extinguishing operation, so as to quickly extinguish the fire in the fire tube. [Description of the Drawings]

[0014] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0015] Figure 1 is a perspective view of the liquid leakage detection device according to an embodiment of the present invention.

[0016] Figure 2 is an exploded view of the liquid leakage detection device according to an embodiment of the present invention.

[0017] Figure 3 is a cross-sectional view of the installation structure of the liquid leakage detection device according to an embodiment of the present invention.

[0018] Figure 4 is a perspective view of the installation structure of the liquid leakage detection device according to an embodiment of the present invention. [Specific Embodiments]

[0019] The structure of the liquid leakage detection device according to an embodiment of the present invention is as Figures 1 to 4 shown, including a submersible level transmitter 10 and a bracket 20.

[0020] The submersible liquid level transmitter 10 includes a liquid level transmitter body 11, a liquid level probe 12, a pressure guiding pipe 13, a mounting nut 14, a heat insulation pad 15 and a heat insulation pad 16. The liquid level probe 12 is connected to the liquid level transmitter body 11 through the pressure guiding pipe 13.

[0021] The liquid level transmitter body 11 is fixed outside the heating furnace fire tube through a bracket 20. The pressure guiding pipe 13 passes through the heating furnace fire tube, and the liquid level probe 12 is arranged at the lower part inside the heating furnace fire tube.

[0022] A burner is installed at the rear end of the heating furnace fire tube 100. There is a jacket 31 on the housing 30 of the burner. In this embodiment, there is a pressure guiding pipe hole 321 and two threaded holes (not shown in the figure) at the lower part of the annular rear wall 32 of the jacket 31. A pressure guiding pipe fixing ring 17 is installed in the pressure guiding pipe hole 321.

[0023] The bracket 20 includes a front plate 21, a top plate 22 and a bottom plate 23. The bracket 20 is arranged below the housing 30 of the burner. The front plate 21 of the bracket 20 is fixed to the lower part of the annular rear wall 32 of the jacket 31 through two screws. The outer surface of the bracket 20 facing the burner housing is sprayed with nano heat insulation paint to block the heat transmitted from the heating furnace.

[0024] The bottom plate 23 of the bracket 20 has a mounting hole 231, and the mounting hole 231 of the bottom plate 23 is located at the rear part of the bracket 20. The upper end of the liquid level transmitter body 11 has a threaded shaft head 111. The threaded shaft head 111 passes through the mounting hole 231 of the bottom plate 23, and the mounting nut 14 is screwed onto the upper end of the threaded shaft head 111. The heat insulation pads 15 and 16 are sleeved on the threaded shaft head 111. The heat insulation pad 16 is located below the bottom plate 23, and the heat insulation pad 15 is located above the bottom plate 23. The signal line output joint 18 of the liquid level transmitter 10 is located at the lower end of the liquid level transmitter body 11. The diameter of the mounting hole 231 is larger than the diameter of the threaded shaft head 111. After the mounting nut 14 is tightened, there is a heat insulation gap between the threaded shaft head 111 of the liquid level transmitter body 11 and the mounting hole 231.

[0025] After the pressure guiding pipe 13 led out from the upper end of the liquid level transmitter body 11 surrounds a flat and long ring 13A with the long axis in the horizontal direction, the pressure guiding pipe 13 passes through the pressure guiding pipe fixing ring 17 and then enters the jacket 31 of the burner housing 30, and the liquid level probe 12 is arranged at the front end of the jacket 31.

[0026] The pressure guiding pipe fixing ring 17 is a three-point heat reduction type fixing ring. Three protruding edges are arranged circumferentially along the outer periphery of the three-point heat reduction type fixing ring. The three protruding edges of the three-point heat reduction type fixing ring are supported by three points of the pressure guiding pipe hole 321 to reduce the heat transfer from the housing 30 of the burner to the pressure guiding pipe 13.

[0027] The arc-shaped top plate 22 serves as a heat insulation plate to cover the flat long ring 13A of the pressure guiding pipe outside the burner and the liquid level transmitter body 11, so as to reduce the influence of the heat radiation of the burner housing 30 on the liquid level transmitter.

[0028] Since the temperature on the burner housing is relatively high, it will transfer heat to the bracket and then to the liquid level transmitter through the bracket, which is not conducive to the normal operation of the liquid level transmitter. In the above embodiments of the present invention, the distance from the liquid level probe to the liquid level transmitter body is lengthened with a flat long ring, and two heat insulation gaskets are used to separate the connection between the bracket and the liquid level transmitter body, so that the temperature of the liquid level transmitter body will not be affected by the heat radiation of the burner housing.

[0029] The distance from the liquid level probe to the liquid level transmitter body can also be lengthened with multiple spiral rings in the shape of a spiral spring.

[0030] In the above embodiments of the present invention, the liquid level probe is used to detect whether there is liquid at the bottom of the fire tube. If no liquid is sensed, it is in a normal working state. After sensing liquid, the liquid level transmitter body transmits the signal through a circuit to the main control cabinet to perform a fire extinguishing operation on the fire tube, so as to quickly extinguish the fire in the fire tube.

Claims

1. A liquid leakage detection device for a heating furnace fire tube, comprising a submersible level transmitter. The submersible level transmitter includes a level transmitter body, a level probe, and a pressure guide tube connecting the transmitter body and the level probe, characterized in that, It includes a bracket. The liquid level transmitter body is fixed outside the heating furnace fire tube through the bracket. The pressure guiding pipe passes through the heating furnace fire tube, and the liquid level probe is arranged at the lower part inside the heating furnace fire tube. The burner or the heating furnace housing includes a jacket. The lower part of the annular rear wall of the jacket includes a pressure guiding pipe hole and a plurality of threaded holes. A fixing ring is installed in the pressure guiding pipe hole, and the pressure guiding pipe passes through the inner hole of the fixing ring and enters the burner housing or the jacket of the heating furnace. The front plate of the bracket is fixed on the annular rear wall of the jacket through a plurality of screws. The fixing ring is a three-point heat reduction type fixing ring. The outer periphery of the three-point heat reduction type fixing ring includes three protruding ribs arranged separately along the circumferential direction. The three protruding ribs of the three-point heat reduction type fixing ring are supported by three points of the pressure guiding pipe hole. The bracket includes a bottom plate, and the bottom plate includes a mounting hole. The submersible liquid level transmitter includes a nut and two heat insulation pads. The upper end of the liquid level transmitter body includes a threaded shaft head. The threaded shaft head passes through the mounting hole of the bottom plate, and the nut is screwed on the upper end of the threaded shaft head. The two heat insulation pads are sleeved on the threaded shaft head, one is located below the bottom plate, and the other is located above the bottom plate. The diameter of the mounting hole is larger than the diameter of the threaded shaft head, and there is a heat insulation gap between the threaded shaft head and the mounting hole.

2. The liquid leakage detection device according to claim 1, characterized in that, The heating furnace fire tube includes a burner, and the burner is located at the rear end of the heating furnace fire tube. The bracket is fixed below the burner or the heating furnace, and the pressure guiding pipe passes through the housing of the burner or directly enters the heating furnace.

3. The liquid leakage detection device according to claim 1, characterized in that, The bracket includes an arc-shaped top plate, and the mounting hole of the bottom plate is located at the rear part of the bracket. The top plate serves as a heat insulation plate and covers the pressure guiding pipe outside the burner and the liquid level transmitter body.

4. The liquid leakage detection device according to claim 2, characterized in that, The outer surface of the bracket facing the burner is sprayed with nano heat insulation paint.

5. The liquid leakage detection device according to claim 3, characterized in that, The pressure guiding pipe led out from the upper end of the liquid level transmitter body forms a flat and long loop with the long axis in the horizontal direction and then enters the burner housing or the heating furnace housing.

6. The liquid leakage detection device according to claim 3, characterized in that, The pressure guiding pipe led out from the upper end of the liquid level transmitter body forms a plurality of spiral loops and then enters the burner housing or the heating furnace housing.

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