An endoscopic flame observation device for an oilfield steam injection boiler and a method of using the same

Abstract

The application discloses an oil field steam injection boiler endoscopic fire observation device and a use method thereof, and relates to the field of oil field steam injection boilers. The device comprises a fire observation protection assembly and a telescopic camera assembly. The fire observation protection assembly comprises a fire observation sealing box. A heat insulation layer is arranged in the fire observation sealing box. An eyepiece assembly is arranged in the heat insulation layer. The telescopic camera assembly comprises a linear motion assembly. A fire observation camera is fixedly arranged on a moving part of the linear motion assembly. The fire observation camera is provided with an endoscope. The endoscope can be inserted into the eyepiece assembly. The device uses automatic and information-based means to replace manual operation, realizes remote video fire observation, realizes physical isolation between an operator and a scene scalding risk, and improves the safety of operation.

Description

Technical Field

[0001] This invention relates to the field of gas injection boiler technology, specifically to an internal observation device for observing fire in an oilfield gas injection boiler and its usage method. Background Technology

[0002] During operation, steam injection boilers require regular observation of the furnace tubes, pipe clamps, insulation, and flame combustion through observation holes. Currently used observation holes are equipped with thickened, high-temperature resistant transparent eyepieces, with visual observation channels created by pre-drilling holes in the boiler shell and insulation layer. These observation holes are installed at the boiler's bearing arch and tail section, allowing observation of the furnace interior from both front and rear directions. Oilfield steam injection boilers often operate continuously for extended periods. The limited sealing effect of the baffles used in the current observation holes leads to persistent overheating in the observation area. Manual observation requires manually opening the baffles to access the furnace interior. Once the baffles are open and the visual channel is opened, hot air and dust from the furnace directly contact the observation eyepieces, causing a rapid temperature increase and posing a safety hazard such as burns. The limited diameter of the observation holes restricts the field of view, and prolonged manual observation of the flame can cause irreversible eye damage. Furthermore, the combustion conditions inside the furnace are difficult to describe and record verbally, and there is a lack of effective means of recording textual and visual information on-site.

[0003] Several boiler observation devices have been proposed in other boiler fields.

[0004] Announcement No. CN220911477U discloses an online monitoring system for burners in pulverized coal industrial boilers, including an observation hole, a camera, a pressure-inducing device, and a control system. The observation hole is located on the furnace wall adjacent to or opposite to the furnace wall where the burner is located. An observation hole door is set outside the observation hole, and an electric drive device is installed on the observation hole door. The camera is set outside the furnace, and the camera is set one-to-one with the burner. The camera, the observation hole, and the center of the burner are arranged in a straight line in space. This system enables online remote monitoring of the burner nozzles without the need for manual on-site operation or boiler shutdown, and observation can be performed at any time as needed.

[0005] The existing camera technology lacks adjustment capabilities and has a narrow field of view.

[0006] Announcement No. CN218295793U discloses a boiler furnace coking observation device, including a protective plate and an observation mechanism that can penetrate the protective plate and extend into the boiler furnace through an observation hole. The observation mechanism includes a hollow, open-ended movable cylinder, horizontally positioned. One end of the cylinder is connected to a compressed air pipeline via a gas supply pipe, and the other end is fixed with a transparent protective cover. A camera is installed inside the transparent protective cover. The camera extends into the boiler furnace, enabling comprehensive observation of the coking situation within the furnace. The wide observation range allows for accurate assessment of the coking conditions.

[0007] The existing technology has no protective measures after the camera enters the furnace body, resulting in a short service life.

[0008] Announcement No. CN219243628U discloses a device for detecting coking conditions on the water-cooled walls of a power plant flame boiler. The device includes a metal probe with a camera fixedly connected to it. A compressed air channel is located inside the metal probe, connecting to an air tank and a jetting mechanism. The airflow from the jetting nozzles converges to form a triangular-section air shroud that blocks the high-temperature camera, extending its lifespan and driving away flames and heat near the observation port, thus allowing the high-temperature camera to clearly capture the coking conditions around the observation port.

[0009] The protective measures of this existing technology require the consumption of gas, which needs to be replenished regularly and cannot be used for a long time.

[0010] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding the more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0011] In view of the above-mentioned defects in the existing technology, the purpose of the present invention is to provide an internal observation device for oilfield steam injection boilers and its usage method. The device has an adjustable camera position, provides sufficient protection for the camera, and can be used for a long time.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] On one hand, the present invention provides an endoscopic fire observation device for an oilfield steam injection boiler, comprising a fire observation protection assembly and a telescopic camera assembly. The fire observation protection assembly includes a fire observation sealing box, within which a heat insulation layer is provided, and within the heat insulation layer, an eyepiece assembly is provided. The telescopic camera assembly includes a linear motion assembly, the moving part of which is fixedly equipped with a fire observation camera, and the fire observation camera is equipped with an endoscope, which can be inserted into the eyepiece assembly.

[0014] Furthermore, a first retaining ring is provided at the bottom of the inner wall of the fire-observation sealing box;

[0015] Specifically, a first flange is provided on the top of the outer wall of the fire observation sealing box, and a base plate is fixed to the bottom surface of the first flange;

[0016] Specifically, the heat insulation layer includes heat insulation sealing filler and a constraint cylinder. The internal cavity of the fire observation sealing box is filled with annular heat insulation sealing filler, and the constraint cylinder supports the inner wall of the heat insulation sealing filler.

[0017] Furthermore, the eyepiece assembly includes an eyepiece chamber, an eyepiece bushing, and an eyepiece lens;

[0018] Specifically, the eyepiece compartment is inserted into the constraint tube, the eyepiece bushing is inserted into the eyepiece compartment, and the eyepiece bushing presses the eyepiece lens against the bottom of the eyepiece compartment.

[0019] Furthermore, a second flange is provided at the top of the outer wall of the eyepiece chamber, a packing gland is provided between the second flange and the first flange, and a second retaining ring is provided at the bottom of the inner wall of the eyepiece chamber;

[0020] Specifically, the packing gland is used to press the heat-insulating sealing packing inside the fire observation sealing box;

[0021] Specifically, a third flange is provided at the top of the outer wall of the eyepiece bushing, and the third flange is fixedly connected to the second flange. A third retaining ring is provided at the bottom of the inner wall of the eyepiece bushing.

[0022] Specifically, the eyepiece lens is equipped with high-temperature resistant sealing gaskets at the front and back, and the third retaining ring of the eyepiece bushing presses the eyepiece lens onto the second retaining ring of the eyepiece compartment, with the high-temperature resistant sealing gaskets providing a sealing function.

[0023] Furthermore, the endoscope is a cylindrical extended lens, and the endoscope is provided with a fire-viewing end and a fixed end. The fire-viewing end is conical, and a high-temperature resistant lens is installed inside the fire-viewing end. The fixed end is fixed to the fire-viewing camera by threads.

[0024] Specifically, the outer diameter of the endoscope is smaller than the inner diameter of the eyepiece bushing, and the endoscope can be tilted within the eyepiece bushing.

[0025] Furthermore, the fire-viewing camera is a low-light, high-definition, electrically adjustable zoom camera, and the linear motion component is an electric actuator.

[0026] Furthermore, the bottom of the fire-watching camera is equipped with a camera mounting base, and the push rod head of the electric push rod is connected to the camera mounting base at the bottom of the fire-watching camera with bolts. The electric push rod is equipped with a bracket with a base.

[0027] Furthermore, the telescopic camera assembly also includes a controller, the power supply of which is connected to the boiler power supply system, and the controller supplies power to the fire-viewing camera and the electric actuator;

[0028] Specifically, the data cable of the fire-watching camera is connected to the duty room monitoring system;

[0029] Specifically, the control line of the electric actuator is connected to the controller.

[0030] Secondly, the present invention provides a method for using an internal observation device for oilfield steam injection boilers, characterized by comprising the following steps:

[0031] S1: Weld the base plate to the boiler tile opening or the lower section of the radiant section, and connect the oilfield steam injection boiler internal observation device as described in claim 8.

[0032] S2. Switch the controller to manual mode or timer mode. After the boiler is started, observe the fire viewing screen on the monitoring system in the duty room.

[0033] In timed mode, the time interval can be manually set. Every certain period of time, the electric actuator will extend to its maximum length, causing the fire-watching camera and other accessories to extend into the fire-watching and protection assembly.

[0034] In manual mode, the electric actuator extends to its maximum length by receiving an external switch signal.

[0035] In manual and timed modes, the electric actuator extends to its longest position and then retracts to prevent the endoscope from being damaged by prolonged heat.

[0036] S3. When it is necessary to focus on observing a certain location inside the furnace, the endoscope can be finely adjusted by making a slight angle adjustment to the camera mounting bracket at the bottom of the fire-observation camera.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] 1. The device uses automation and information technology to replace manual labor, enabling remote video observation of the fire, physically isolating operators from the risk of burns on site, and improving operational safety.

[0039] 2. The device uses cameras with appropriate parameters for fire observation, and the video images are transmitted back to the duty room in real time for operators to review and debrief, which effectively improves the efficiency of on-site operation and provides a reference for subsequent understanding and comprehensive judgment of the boiler's operating status.

[0040] 3. The device uses annular heat-insulating sealing filler to replace the original block-type insulation. The sealing gland is effectively compressed by the pressure cap to form a dense heat-insulating layer. It has a good sealing and heat-insulating effect and a long service life. It effectively reduces the impact of vibration generated during the relocation and operation of the mobile boiler on the insulation layer, effectively improves the service life of the heat-insulating area, reduces the surface temperature of the area, and reduces the risk of overheating and burns.

[0041] 4. The device uses a multi-layered structure design, which allows for disassembly, maintenance and repair of various parts of the device from outside the furnace according to the actual situation, without the need to enter the furnace for maintenance, effectively avoiding various safety hazards caused by operation in confined space. Attached Figure Description

[0042] Figure 1 This is a top view schematic diagram of an internal observation device for an oilfield steam injection boiler according to the present invention;

[0043] Figure 2 This is an exploded view of an internal observation device for an oilfield steam injection boiler according to the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of an internal observation device for an oilfield steam injection boiler according to the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of the fire observation sealing box in this invention. Figure 1 ;

[0046] Figure 5 This is a schematic diagram of the structure of the fire observation sealing box in this invention. Figure 2 ;

[0047] Figure 6 This is a schematic diagram of the structure of the fire-viewing sealing box filled with heat-insulating sealing filler in this invention.

[0048] In the diagram: 1. Base plate; 2. Fire observation sealing box; 3. Packing gland; 4. Eyepiece chamber; 5. Eyepiece bushing; 6. Endoscope; 7. Fire observation camera; 8. Electric actuator; 9. Bracket; 10. Controller; 11. Camera mounting base; 12. Eyepiece lens; 13. Thermal insulation sealing packing. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1:

[0051] Please see Figures 1 to 6 The present invention provides an internal observation device for oilfield steam injection boilers, comprising an observation protection assembly and a telescopic camera assembly. The observation protection assembly includes an observation sealing box 2, an insulation layer is provided inside the observation sealing box 2, and an eyepiece assembly is provided inside the insulation layer. The telescopic camera assembly includes a linear motion assembly, and an observation camera 7 is fixedly mounted on the moving part of the linear motion assembly. An endoscope 6 is provided on the observation camera 7, and the endoscope 6 can be inserted into the eyepiece assembly.

[0052] The observation sealing box 2 is a cylindrical tube made of 310S material. A first retaining ring is provided at the bottom of the inner wall of the observation sealing box 2. The central through hole of the first retaining ring is used for observation. The heat insulation layer includes heat insulation sealing filler 13 and a constraint cylinder. The internal cavity of the observation sealing box 2 is filled with annular heat insulation sealing filler 13. In order to ensure the concentricity of the heat insulation sealing filler 13, a constraint cylinder is installed at the center of the cavity. The constraint cylinder supports the inner wall of the heat insulation sealing filler 13. A first flange is provided at the top of the outer wall of the observation sealing box 2. A base plate 1 is fixed to the bottom surface of the first flange.

[0053] Among them, the bottom plate 1 is a square steel plate. The bottom plate 1 itself needs to be welded to the observation position of the boiler. The observation position is generally selected at the tile opening or the lower section of the radiant section.

[0054] Furthermore, the eyepiece assembly includes an eyepiece compartment 4, an eyepiece bushing 5, and an eyepiece lens 12. The eyepiece compartment 4 is inserted into a constraint tube, the eyepiece bushing 5 is inserted into the eyepiece compartment 4, and the eyepiece bushing 5 presses the eyepiece lens 12 against the bottom of the eyepiece compartment 4.

[0055] The eyepiece chamber 4 is cylindrical. A second flange is provided on the top of the outer wall of the eyepiece chamber 4. A packing gland 3 is provided between the second flange and the first flange. A second retaining ring is provided on the bottom of the inner wall of the eyepiece chamber 4. The central through hole of the second retaining ring is used for fire observation.

[0056] The eyepiece bushing 5 is cylindrical. A third flange is provided on the top of the outer wall of the eyepiece bushing 5. The third flange is fixedly connected to the second flange. A third retaining ring is provided on the bottom of the inner wall of the eyepiece bushing 5. The central through hole of the third retaining ring is used for fire observation.

[0057] The eyepiece lens 12 is surrounded by high-temperature resistant sealing gaskets at the front and back. The third retaining ring of the eyepiece bushing 5 presses the eyepiece lens 12 onto the second retaining ring of the eyepiece compartment 4, and the high-temperature resistant sealing gaskets play a sealing role.

[0058] Among them, the packing gland 3 is a hollow disc, fixed between the first flange and the second flange, used to press the heat insulation sealing packing 13 inside the fire observation sealing box 2.

[0059] Specifically, the base plate 1 and the first flange, the first flange and the packing gland 3, the packing gland 3 and the second flange, and the second flange and the third flange are all fixedly connected by bolt holes and bolts.

[0060] The endoscope 6 is a cylindrical extended lens. The endoscope 6 is provided with a fire-viewing end and a fixed end. The fire-viewing end is conical. A 4mm high-temperature resistant lens is installed inside the fire-viewing end to monitor a 70° field of view and an observation distance of about 10 meters. The fixed end is fixed to the fire-viewing camera 7 by threads. The outer diameter of the endoscope 6 is smaller than the inner diameter of the eyepiece bushing 5. The endoscope 6 can be tilted in the eyepiece bushing 5.

[0061] Among them, the fire-observing camera 7 is a low-light high-definition electric zoom camera. The lens of the fire-observing camera 7 has a threaded interface and can be connected to the endoscope 6. The bottom of the fire-observing camera 7 is equipped with a camera mounting base 11, which is fixed to the moving part of the linear motion component.

[0062] The linear motion component is an electric actuator 8, which can extend and retract horizontally. The actuator head of the electric actuator 8 is connected to the camera mounting base 11 at the bottom of the fire-watching camera 7 with bolts. The electric actuator 8 is equipped with a bracket 9 with a base for fixing the electric actuator 8.

[0063] The telescopic camera assembly also includes a controller 10, which is connected to the boiler power supply system. The controller 10 supplies power to the fire observation camera 7 and the electric actuator 8. The data cable of the fire observation camera 7 is connected to the monitoring system in the duty room, and the control cable of the electric actuator 8 is connected to the controller 10. The controller 10 is used to control the operating status of the electric actuator. There are two operating modes: timed and manual. In timed mode, the time interval is manually set, and at regular intervals, the electric actuator 8 extends to its maximum position, causing the fire observation camera 7 and other accessories to extend into the fire observation and protection assembly. In manual mode, the electric actuator 8 extends to its maximum position upon receiving an external switch signal. In both manual and timed modes, the electric actuator retracts after 60 seconds at its maximum extension position to prevent the endoscope 6 from being damaged by prolonged heat.

[0064] It should be noted that the endoscope 6, the fire-viewing camera 7, the electric actuator 8, the controller 10, and the heat-insulating sealing filler 13 are all existing technologies, and their structures are clear to those skilled in the art.

[0065] Example 2:

[0066] Based on Example 1, this example provides a method for using an internal observation device for oilfield steam injection boilers:

[0067] S1: Weld the base plate 1 to the boiler tile opening or the lower section of the radiant section, and connect it to an oilfield steam injection boiler internal observation device.

[0068] S2. Switch controller 10 to manual mode or timer mode, check the operation of the unit after the boiler is started; observe the fire viewing screen on the general monitoring system;

[0069] S3, Fine-tuning of the device:

[0070] When it is necessary to focus on observing a certain location inside the furnace, the endoscope 6 can be finely adjusted by adjusting the angle of the camera mounting base 11 at the bottom of the fire-observation camera 7. For example, if the camera mounting base 11 and the push rod are connected by bolts, loosen the bolts, add shims, and then tighten them to change the angle between the camera mounting base 11 and the push rod, thereby changing the angle between the endoscope 6 and the eyepiece bushing 5.

[0071] S4. Equipment maintenance:

[0072] Replace the packing seal:

[0073] With the equipment in shutdown mode, remove the eyepiece assembly and packing gland 3 to expose the thermal insulation sealing packing 13. Use a flathead screwdriver or hook to remove and replace the thermal insulation sealing packing 13. After replacement, install the packing gland 3 and eyepiece assembly.

[0074] Replace or wipe the eyepiece:

[0075] With the equipment in shutdown mode, remove the eyepiece assembly from the fire observation sealing box 2; disassemble the eyepiece assembly, pull out the eyepiece bushing 5 and the eyepiece lens 12 at its front end and the high-temperature resistant sealing gasket, wipe or replace the eyepiece lens 12, and after maintenance, reassemble the eyepiece assembly and put it into the fire observation sealing box 2.

[0076] The present invention is applicable to the field development of heavy oil thermal recovery in oil fields and has the advantages of long service life, simple operation and low maintenance frequency.

[0077] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0078] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An internal observation device for oilfield steam injection boilers, comprising an observation and protection assembly and a telescopic camera assembly, characterized in that, The fire observation protection assembly includes a fire observation sealing box, a heat insulation layer is provided inside the fire observation sealing box, and an eyepiece assembly is provided inside the heat insulation layer. The telescopic camera assembly includes a linear motion component, the moving part of which is fixedly equipped with a fire-viewing camera, and the fire-viewing camera is equipped with an endoscope, which can be inserted into an eyepiece component.

2. The internal observation device for oilfield steam injection boilers according to claim 1, characterized in that, A first retaining ring is provided at the bottom of the inner wall of the fire observation sealing box; A first flange is provided on the top of the outer wall of the fire observation sealing box, and a base plate is fixed to the bottom surface of the first flange. The heat insulation layer includes heat insulation sealing filler and a constraint cylinder. The internal cavity of the fire observation sealing box is filled with annular heat insulation sealing filler, and the constraint cylinder supports the inner wall of the heat insulation sealing filler.

3. The internal observation device for oilfield steam injection boilers according to claim 2, characterized in that, The eyepiece assembly includes an eyepiece chamber, an eyepiece bushing, and an eyepiece lens; The eyepiece compartment is inserted into the constraint tube, the eyepiece bushing is inserted into the eyepiece compartment, and the eyepiece bushing presses the eyepiece lens against the bottom of the eyepiece compartment.

4. The internal observation device for oilfield steam injection boilers according to claim 3, characterized in that, A second flange is provided at the top of the outer wall of the eyepiece chamber, a packing gland is provided between the second flange and the first flange, and a second retaining ring is provided at the bottom of the inner wall of the eyepiece chamber; The packing gland is used to press the heat-insulating sealing packing inside the fire observation sealing box; A third flange is provided at the top of the outer wall of the eyepiece bushing, and the third flange is fixedly connected to the second flange. A third retaining ring is provided at the bottom of the inner wall of the eyepiece bushing. The eyepiece lens is surrounded by high-temperature resistant sealing gaskets at the front and back. The third retaining ring of the eyepiece bushing presses the eyepiece lens onto the second retaining ring of the eyepiece compartment, and the high-temperature resistant sealing gaskets play a sealing role.

5. The internal observation device for oilfield steam injection boilers according to claim 3, characterized in that, The endoscope is a cylindrical extended lens. The endoscope is provided with a fire-viewing end and a fixed end. The fire-viewing end is conical and a high-temperature resistant lens is installed inside the fire-viewing end. The fixed end is fixed to the fire-viewing camera by threads. The outer diameter of the endoscope is smaller than the inner diameter of the eyepiece bushing, and the endoscope can be tilted within the eyepiece bushing.

6. The internal observation device for oilfield steam injection boilers according to claim 5, characterized in that, The fire-viewing camera is a low-light, high-definition, electrically adjustable zoom camera, and the linear motion component is an electric actuator.

7. The internal observation device for oilfield steam injection boilers according to claim 6, characterized in that, The fire-watching camera is equipped with a camera mounting base at its bottom. The push rod head of the electric push rod is connected to the camera mounting base at the bottom of the fire-watching camera with bolts. The electric push rod is equipped with a bracket with a base.

8. The internal observation device for oilfield steam injection boilers according to claim 6, characterized in that, The telescopic camera assembly also includes a controller, whose power supply is connected to the boiler power supply system, and the controller supplies power to the fire-viewing camera and the electric push rod. The data cable of the fire-watching camera is connected to the monitoring system in the duty room. The control line of the electric actuator is connected to the controller.

9. A method for using an internal observation device for steam injection boilers in oil fields, characterized in that, Includes the following steps: S1: Weld the base plate to the boiler tile opening or the lower section of the radiant section, and connect the oilfield steam injection boiler internal observation device as described in claim 8. S2. Switch the controller to manual mode or timer mode. After the boiler is started, observe the fire viewing screen on the monitoring system in the duty room. S3. When it is necessary to focus on observing a certain location inside the furnace, the endoscope can be finely adjusted by making a slight angle adjustment to the camera mounting bracket at the bottom of the fire-observation camera.

10. The method of using the internal observation device for oilfield steam injection boilers according to claim 9, characterized in that, In timed mode, the time interval can be manually set. Every certain period of time, the electric actuator will extend to its maximum length, causing the fire-watching camera and other accessories to extend into the fire-watching and protection assembly. In manual mode, the electric actuator extends to its maximum length by receiving an external switch signal. In manual and timed modes, the electric actuator extends to its longest position and then retracts to prevent the endoscope from being damaged by prolonged heat.

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