Flame detector with protection structure

Abstract

The utility model discloses a flame detector with a protection structure, which comprises a flame detector body and a mounting nut, the mounting nut is fixed at the head of the flame detector body, the flame detector further comprises a gas protection mechanism, the gas protection mechanism comprises a hollow ring, a side connecting pipe, a gas guide pipe, a rotating pipe and an air guide plate, the flame detector body behind the mounting nut is externally sleeved with a hollow ring, a side connecting pipe is welded outside a pipe body of the hollow ring in an intercommunication mode, an air guiding pipe is welded to the inner ring wall of the hollow ring in an intercommunication mode, and an air protection mechanism is arranged at the flame detector body and the mounting nut and can introduce air flow; according to the flame detector, airflow at the air guide pipe is guided by the air guide plate to be blown to the area near the mounting nut through the rotary pipe, so that hot airflow in a boiler is not prone to approaching the flame detector body with airflow protection, cooling of the head of the flame detector body is assisted, and stable operation of the flame detector body is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of flame detector technology, and in particular to a flame detector with a protective structure. Background Technology

[0002] A flame detector is a device used to detect the intensity of flames in a combustion chamber or burner. It plays a crucial role in industrial safety monitoring systems. The flame detector is a key piece of equipment in the boiler furnace safety monitoring system (FSSS), used to determine the establishment, extinction, or presence and absence of flames in the entire furnace or a single burner. When a complete furnace fire or a single burner fire occurs, the flame detection device accurately activates its contacts to issue an alarm. Relying on the FSSS system's interlocking function, it stops the operation of the corresponding pulverizer, coal mill, fuel oil main valve, or primary air fan, thereby preventing fuel accumulation in the furnace and the resulting catastrophic accident.

[0003] When existing flame detectors are installed and used in high-temperature boilers, the high-temperature environment inside the boiler causes the probe of the flame detector to be frequently affected by high temperatures. The high-temperature hot airflow can also affect the sensitive elements of the flame detector, causing the detector to lose sensitivity due to overheating and fail to accurately detect the presence of flames. Furthermore, high temperatures may also damage the electronic components inside the detector, thereby affecting the stability of the entire detector. To address this, we propose a flame detector with a protective structure. Utility Model Content

[0004] The main objective of this invention is to provide a flame detector with a protective structure. An air protection mechanism is installed at the flame detector body and the mounting nut. This mechanism introduces airflow, which, guided by a guide plate, is blown through a vortex tube towards the area near the mounting nut. This prevents hot air from the boiler from approaching the flame detector body protected by the airflow, thus aiding in the cooling of the flame detector head and ensuring stable operation. Furthermore, the introduction of external gas by the air protection mechanism forms a protective layer on the flame detector body, effectively isolating it from direct damage by high-temperature flames or harmful gases. This effectively solves the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A flame detector with a protective structure includes a flame detector body and a mounting nut. The mounting nut is fixed to the head of the flame detector body. The flame detector body also includes a gas protection mechanism, which includes a hollow ring, a side pipe, an air intake pipe, a swirl pipe, and a guide plate. The flame detector body behind the mounting nut is fitted with a hollow ring, and the side pipe is welded to the outside of the hollow ring. The air intake pipe is welded to the inner wall of the hollow ring. A threaded hole for inserting the air intake pipe is opened through the surface of the mounting nut. A swirl pipe is screwed into the other end of the threaded hole away from the air intake pipe. A guide plate is welded to the swirl pipe at an angle towards the opening of the air intake pipe.

[0007] Furthermore, the inner wall of the hollow ring is provided with a ring of through holes, and an air duct is inserted and welded into the through holes.

[0008] By adopting the above technical solution, the hollow ring can be welded together after being inserted into the air intake tube through the connecting hole, ensuring that the air intake tube is firmly fixed at the hollow ring.

[0009] Furthermore, a ring interface is provided on the inner wall of the through hole, and a pipe interface is provided on the surface of the air duct outside the ring interface.

[0010] By adopting the above technical solution, the through hole is connected to the pipe interface of the gas inlet pipe, which facilitates the gas to enter the gas inlet pipe from the hollow ring.

[0011] Furthermore, the surface of the air intake tube away from the hollow ring has a raised hoop, and the hoop is inserted into the rear end cavity of the threaded hole.

[0012] By adopting the above technical solution, the air intake tube can be clamped into the threaded hole for connection.

[0013] Furthermore, the inner cavity of the hollow ring is interconnected with the cavity of the spiral tube, and the outer tube wall of the spiral tube away from the hollow ring is provided with a threaded outer tube wall.

[0014] By adopting the above technical solution, after the hollow ring and the spiral tube are interconnected, the spiral tube can obtain a gas source by connecting to an external gas supply equipment pipeline through a pipe body with a threaded outer wall.

[0015] Furthermore, the air guide plate is a semi-circular plate, and the semi-circular plate is inclinedly welded to the outside of the vortex tube opening.

[0016] By adopting the above technical solution, the semi-circular plate of the air guide plate can guide the airflow to the central hole side of the mounting nut after welding at the swivel tube.

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

[0018] This utility model provides an air protection mechanism at the flame detector body and the mounting nut. The air protection mechanism can introduce airflow. The airflow at the air inlet pipe is guided by the air guide plate and blown to the area near the mounting nut through the vortex tube. This makes it difficult for the hot airflow in the boiler to approach the flame detector body with airflow protection, thus assisting in the cooling of the flame detector head and ensuring the stable operation of the flame detector body.

[0019] Furthermore, the gas protection mechanism can form a protective layer for the flame detector body after introducing external gas, effectively isolating the flame detector body from direct damage by high-temperature flames or harmful gases. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a flame detector with a protective structure according to the present invention.

[0021] Figure 2 This is a schematic diagram showing the disassembled mounting nut and gas protection mechanism of a flame detector with a protective structure according to this utility model.

[0022] Figure 3 This is an exploded view of the gas protection mechanism of a flame detector with a protective structure according to this utility model.

[0023] Figure 4 This is a schematic diagram of the spiral tube structure of a flame detector with a protective structure according to the present invention.

[0024] In the diagram: 1. Flame detector body; 2. Mounting nut; 3. Gas protection mechanism; 4. Hollow ring; 5. Side pipe; 6. Through hole; 7. Air intake pipe; 8. Pipe interface; 9. Ring interface; 10. Hoop ring; 11. Threaded hole; 12. Swivel pipe; 13. Air guide plate. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] like Figure 1-4As shown, a flame detector with a protective structure includes a flame detector body 1 and a mounting nut 2. The flame detector body 1 is fixed with the mounting nut 2 at its head. It also includes a gas protection mechanism 3. The gas protection mechanism 3 includes a hollow ring 4, a side pipe 5, an air intake pipe 7, a swivel pipe 12, and a guide plate 13. The flame detector body 1 behind the mounting nut 2 is fitted with a hollow ring 4, and the side pipe 5 is welded to the outside of the tube of the hollow ring 4. The air intake pipe 7 is welded to the inner wall of the hollow ring 4. The mounting nut 2 has a threaded hole 11 through it for inserting the air intake pipe 7, and the swivel pipe 12 is screwed into the other end of the threaded hole 11 away from the air intake pipe 7. The guide plate 13 is welded to the swivel pipe 12 at an angle toward the opening of the air intake pipe 7.

[0027] Among them, the inner wall of the hollow ring 4 is provided with a ring of through holes 6, and an air duct 7 is inserted and welded into the through holes 6.

[0028] By adopting the above technical solution, the hollow ring 4 can be welded together after the air inlet pipe 7 is inserted through the connecting hole 6, ensuring that the air inlet pipe 7 is firmly fixed at the hollow ring 4.

[0029] Among them, a ring interface 9 is provided at the inner wall of the through hole 6, and a pipe interface 8 is provided on the surface of the air duct 7 outside the ring interface 9.

[0030] By adopting the above technical solution, the through hole 6 is interconnected with the ring interface 9 and the pipe interface 8 of the air intake pipe 7, which facilitates the gas to enter the air intake pipe 7 from the hollow ring 4.

[0031] Among them, the surface of the air intake pipe 7 away from the hollow ring 4 has a raised hoop 10, and the hoop 10 is inserted into the rear end cavity of the threaded hole 11.

[0032] By adopting the above technical solution, the air intake tube 7 can be snapped into the threaded hole 11 by the hoop 10 for connection.

[0033] The inner cavity of the hollow ring 4 is connected to the cavity of the spiral tube 12, and the spiral tube 12 is provided with a threaded outer tube wall away from the outer tube wall of the hollow ring 4.

[0034] By adopting the above technical solution, after the hollow ring 4 and the spiral tube 12 are interconnected, the spiral tube 12 can obtain a gas source by connecting to the external gas supply equipment pipeline through the tube body with the threaded outer tube wall.

[0035] The air guide plate 13 is a semi-circular plate, and the semi-circular plate of the air guide plate 13 is inclinedly welded to the outside of the pipe opening of the vortex tube 12.

[0036] By adopting the above technical solution, the semi-circular plate of the air guide plate 13 can guide the airflow to the middle hole side of the mounting nut 2 after welding at the swirl tube 12.

[0037] It should be noted that this utility model is a flame detector with a protective structure. A gas protection mechanism 3 is provided at the flame detector body 1 and the mounting nut 2. The hollow ring 4 of the gas protection mechanism 3 can be snapped onto the outer shell of the flame detector body 1. The air intake pipe 7 of the hollow ring 4 can then be inserted into the threaded hole 11 of the mounting nut 2. Simultaneously, the air intake pipe 7 can be secured in the threaded hole 11 with a clamp 10. Furthermore, a spiral pipe 12 with a guide vane 13 can be screwed into the other end of the threaded hole 11. The mounting nut 2 can also be installed at the boiler mounting location. With reference to the air outlet position of the spiral tube 12, when the flame detector body 1 is installed at the boiler for flame detection, the spiral tube 12 can obtain an air source by connecting the external air supply equipment pipeline through the tube body with the threaded outer tube wall. Then the airflow can enter the hollow ring 4 from the spiral tube 12 and enter the air intake pipe 7. Under the guidance of the air guide plate 13, the airflow at the air intake pipe 7 passes through the spiral tube 12 and blows towards the area near the mounting nut 2, so that the hot airflow in the boiler is not easy to approach the flame detector body 1 which has airflow protection, thus ensuring the stable operation of the flame detector body 1.

[0038] It should be noted that this utility model is a flame detector with a protective structure. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flame detector with a protective structure, comprising a flame detector body (1) and a mounting nut (2), the head of the flame detector body (1) is fixed with the mounting nut (2), characterized in that: Also include the gas protection mechanism (3), the gas protection mechanism (3) includes hollow ring (4), side pipe (5), air guide pipe (7), spiral pipe (12) and air deflector (13), the hollow ring (4) is clamped outside the flame detector body (1) behind the mounting nut (2), and the pipe body of the hollow ring (4) is interpenetrating welded with the side pipe (5), the inner wall of the hollow ring (4) is interpenetrating welded with the air guide pipe (7), the surface of the mounting nut (2) is provided with a threaded hole (11) for penetrating the air guide pipe (7), and the threaded hole (11) is rotatably connected with the spiral pipe (12) at the other end of the air guide pipe (7), and the air deflector (13) is inclinedly welded on the pipe opening of the spiral pipe (12) towards the air guide pipe (7).

2. A flame detector with a protective structure according to claim 1, characterized in that: The inner wall of the hollow ring (4) is provided with a through hole (6) in annular distribution, and the air guide pipe (7) is welded in the through hole (6).

3. A flame detector with a protective structure according to claim 2, characterized in that: The inner hole wall of the through hole (6) is provided with a ring interface (9), and the surface of the air guide pipe (7) outside the ring interface (9) is provided with a pipe interface (8).

4. A flame detector with a protective structure according to claim 3, characterized in that: The pipe body surface of the air guide pipe (7) away from the hollow ring (4) is provided with a hoop (10), and the hoop (10) is clamped into the rear end cavity of the threaded hole (11).

5. A flame detector with a protective structure according to claim 4, characterized in that: The inner cavity of the hollow ring (4) and the tube cavity of the spiral pipe (12) are interconnected, and the spiral pipe (12) is provided with a threaded outer tube wall away from the outer tube wall of the hollow ring (4).

6. A flame detector with a protective structure according to claim 1, characterized in that: The plate body of the air deflector (13) is a semicircular plate body, and the semicircular plate body of the air deflector (13) is inclinedly welded outside the pipe opening of the spiral pipe (12).

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