Full-hearth infrared flame detection device

Abstract

The utility model relates to a full-hearth infrared flame detection device which comprises a furnace wall and a light gathering groove, the light gathering groove penetrates through the furnace wall and comprises a glass cover, a first concave reflector, a second concave reflector, a support, an outer tube and a tubular reflecting layer, the second concave reflector is arranged on the concave face of the inner side of the support, the glass cover is arranged on the support, and the outer tube is arranged on the glass cover. The support and the glass cover form a closed cavity, the second concave reflecting mirror is located on one side of the closed cavity, and circular holes are formed in the middle of the second concave reflecting mirror and the middle of the support. A rotary annular receiving belt is formed through the first concave reflector and the second concave reflector and covers and sweeps the whole space of a boiler in front, light is emitted to the second concave reflector through the glass cover and reflected and gathered to the first concave reflector through the second concave reflector, and the first concave reflector reflects and focuses the light to an opening of the tubular reflecting layer.

Description

Technical Field

[0001] The invention belongs to the field of furnace flame detection, in particular to a full furnace infrared flame detection device. Background Art

[0002] In the combustion process of large thermal power plant boilers, flame detection probes are essential to determine the combustion conditions of the furnace and realize automatic management and control of the combustion process. At present, infrared flame detection probes are widely used for flame monitoring and fire protection at home and abroad. This probe is suitable for monitoring the flames of coal, oil, natural gas and other fuels, and can intuitively and accurately determine the flame conditions of boiler combustion.

[0003] There is an existing related patent, "An external peep-type installation structure for a flame detection probe in a thermal power plant" with patent number CN202122180862.5, which has the characteristic of "being able to reduce the modification cost when the internal peep-type installation structure is converted into an external peep-type installation structure", but it still has some shortcomings. For example, the installation tube is a long straight structure, which causes the infrared light it receives to be mainly in the direction of the front of the installation tube opening. Therefore, the device is more sensitive to the combustion conditions in the direction of the front, but cannot flexibly detect the combustion conditions in other directions, and cannot realize full boiler detection. Therefore, a full-furnace infrared flame detection device is proposed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the following technical problems in the prior art: the mounting tube is a long straight structure, so the infrared light it receives is mainly in the direction of the front opening of the mounting tube. Therefore, the device is more sensitive to the combustion conditions in the direction of the front opening, but cannot flexibly detect the combustion conditions in other directions.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a full furnace infrared flame detection device, comprising:

[0007] A furnace wall, a focusing groove, one end of the focusing groove passes through the furnace wall and extends into the inner side of the furnace chamber, the focusing groove comprises a glass cover, a first concave reflector, a second concave reflector, a bowl-shaped shell, an outer tube and a tubular reflective layer, the second concave reflector is arranged on the inner concave surface of the bowl-shaped shell, a glass cover is arranged on the bowl-shaped shell, the bowl-shaped shell and the glass cover form a closed cavity, the second concave reflector is located on one side of the closed cavity, a circular hole is opened in the middle of the second concave reflector and the bowl-shaped shell, the side of the bowl-shaped shell away from the second concave reflector is fixedly connected with the outer tube, the inner circumference of the outer tube is provided with a tubular reflective layer, one end of the tubular reflective layer extends into the circular hole, the middle part of the glass cover is provided with a first concave reflector, the first concave reflector corresponds to the circular hole, and the glass cover extends into the furnace wall;

[0008] The detection component includes a detection frame, a detection slot, an infrared sensor and a support frame, the outer tube extends into the detection slot, a detection slot is opened in the middle of the detection frame, the outer tube is rotatably connected to the detection frame, an infrared sensor is arranged on the detection frame, the infrared sensor extends into the detection slot, and the infrared sensor corresponds to the opening of the tubular reflective layer.

[0009] As a preferred technical solution of the full furnace infrared flame detection device, the focusing trough further includes a rotating frame and an outer bracket, the furnace wall is plugged with the outer bracket, the inner side of the outer bracket is rotatably connected to the rotating frame, the inner side of the rotating frame is fixedly provided with an outer tube, the focusing trough further includes a motor, a gear 1 and a gear 2, the outer bracket is fixedly connected to the furnace wall, the outer bracket is provided with a motor, the power end of the motor is provided with a gear 1, the rotating frame is provided with a gear 2, and the gear 2 is meshed with the gear 1;

[0010] The motor drives gear one to rotate, and gear one rotates with the rotating frame through gear two, and the rotating frame rotates with the outer tube, the bowl-shaped shell, the glass cover and the concave reflector one, so as to change the direction in which the glass cover receives light, so that light from different directions can enter the glass cover, and then be focused and reflected by both sides of the concave reflector two and the concave reflector one to enter the tubular reflective layer.

[0011] As a preferred technical solution for a full-furnace infrared flame detection device, the outer tube is bent, and the angle between the two sides of the bent outer tube is between 115 and 128 degrees.

[0012] As a preferred technical solution of the full furnace infrared flame detection device, the detection assembly also includes a moving frame and a convex lens, the inner cavity of the detection slot is slidably connected with the moving frame, the middle part of the moving frame is provided with a convex lens, and the convex lens corresponds to the opening of the tubular reflective layer;

[0013] After entering the tubular reflective layer, the light is reflected multiple times by the wall of the tubular reflective layer and reaches the detection groove. The convex lens gathers the light and finally hits the detection head of the infrared sensor, where the infrared light will be detected.

[0014] As a preferred technical solution of the full furnace infrared flame detection device, the detection assembly also includes a servo motor, a screw rod and a sliding groove. The inner top wall of the detection groove is provided with a sliding groove, the inner side of the sliding groove is rotatably connected with a screw rod, and one end of the screw rod is connected to the power output end of the servo motor arranged on the outer side of the detection frame;

[0015] The servo motor controls the convex lens to move closer to and away from the infrared sensor, thereby changing the focus of the light and making more light hit the detection head of the infrared sensor.

[0016] The beneficial effects of the whole furnace infrared flame detection device of the present invention are as follows: a rotating annular receiving belt is formed by concave reflector 1 and concave reflector 2 to cover and sweep the entire space of the boiler in front, light hits concave reflector 2 through a glass cover, is reflected by concave reflector 2 and gathered on concave reflector 1, concave reflector 1 reflects and focuses the light to the opening of the tubular reflective layer, after entering the tubular reflective layer, the light is reflected multiple times by the wall of the tubular reflective layer and reaches the detection groove, the convex lens gathers the light and finally hits the detection head of the infrared sensor, the infrared light therein will be detected, and the combustion situation in the whole furnace can be judged by detecting the infrared light situation therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the positional relationship between the glass cover and the concave reflector 1 of the present invention;

[0020] Figure 3 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0021] Figure 4 It is an annular receiving zone formed by the focusing groove of the present invention.

[0022] Figure numerals: 100, furnace wall; 200, detection component; 201, detection frame; 202, focusing groove; 203, infrared sensor; 204, moving frame; 205, convex lens; 206, servo motor; 207, lead screw; 208, sliding groove; 209, supporting frame; 300, focusing groove; 301, glass cover; 302, concave reflector 1; 303, concave reflector 2; 304, bracket; 305, outer tube; 306, rotating frame; 307, outer bracket; 308, motor; 309, gear 1; 310, gear 2; 311, tubular reflective layer. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] like Figure 1-4 As shown, the present invention proposes a full furnace infrared flame detection device, comprising:

[0028] The furnace wall 100 and the focusing groove 300 are provided. One end of the focusing groove 300 passes through the furnace wall 100 and extends into the inner side of the furnace. The focusing groove 300 includes a glass cover 301, a concave reflector 1 302, a concave reflector 2 303, a bowl-shaped shell 304, an outer tube 305 and a tubular reflective layer 311. The concave surface of the inner side of the bowl-shaped shell 304 is provided with the concave reflector 2 303. The bowl-shaped shell 304 is provided with a glass cover 301. The bowl-shaped shell 304 and the glass cover 301 form a closed cavity. The concave reflector 2 303 is provided on the inner side of the bowl-shaped shell 304. The second concave reflector 303 is located at one side of the closed cavity, a circular hole is opened in the middle of the second concave reflector 303 and the bowl-shaped shell 304, an outer tube 305 is fixedly connected to the side of the bowl-shaped shell 304 away from the second concave reflector 303, a tubular reflective layer 311 is arranged on the inner circumference of the outer tube 305, one end of the tubular reflective layer 311 extends into the circular hole, a concave reflector 1 302 is arranged in the middle of the glass cover 301, the concave reflector 1 302 corresponds to the circular hole, and the glass cover 301 extends into the furnace wall 100;

[0029] The detection component 200 includes a detection frame 201, a detection slot 202, an infrared sensor 203 and a support frame 209. The outer tube 305 extends into the detection slot 202. The detection slot 202 is opened in the middle of the detection frame 201. The outer tube 305 is rotatably connected to the detection frame 201. The detection frame 201 is provided with an infrared sensor 203. The infrared sensor 203 extends into the detection slot 202. The infrared sensor 203 corresponds to the opening of the tubular reflective layer 311.

[0030] As a preferred technical solution of the full furnace infrared flame detection device, the focusing groove 300 also includes a rotating frame 306 and an outer bracket 307, the furnace wall 100 is plugged with the outer bracket 307, the inner side of the outer bracket 307 is rotatably connected with the rotating frame 306, the inner side of the rotating frame 306 is fixedly provided with an outer tube 305, the focusing groove 300 also includes a motor 308, a gear 1 309 and a gear 2 310, the outer bracket 307 is fixedly connected to the furnace wall 100, the outer bracket 307 is provided with a motor 308, the power end of the motor 308 is provided with a gear 1 309, the rotating frame 306 is provided with a gear 2 310, and the gear 2 310 is meshed with the gear 1 309;

[0031] The motor 308 drives the gear 1 309 to rotate, and the gear 1 309 rotates with the rotating frame 306 through the gear 2 310. The rotating frame 306 rotates with the outer tube 305, the bowl-shaped shell 304, the glass cover 301 and the concave reflector 1 302, so as to change the direction in which the glass cover 301 receives light, so that light from different directions in the furnace can enter the glass cover 301, and then be focused and reflected by the two sides of the concave reflector 2 303 and the concave reflector 1 302 to enter the tubular reflective layer 311.

[0032] As a preferred technical solution for a full-furnace infrared flame detection device, the outer tube 305 is bent, and the angle between the two sides of the bent outer tube 305 is between 115 and 128 degrees.

[0033] As a preferred technical solution of the full furnace infrared flame detection device, the detection assembly 200 further includes a moving frame 204 and a convex lens 205. The inner cavity of the detection slot 202 is slidably connected with the moving frame 204. The middle part of the moving frame 204 is provided with a convex lens 205. The convex lens 205 corresponds to the opening of the tubular reflective layer 311.

[0034] Part of the light directly irradiates the opening of the reflective layer 311. After entering the tubular reflective layer 311, the light is reflected multiple times by the wall of the tubular reflective layer 311 and reaches the detection groove 202. The convex lens 205 gathers the light and finally hits the detection head of the infrared sensor 203, and the infrared light therein will be detected.

[0035] As a preferred technical solution for a full-furnace infrared flame detection device, the detection component 200 also includes a servo motor 206, a screw rod 207 and a sliding groove 208. The inner top wall of the detection groove 202 is provided with a sliding groove 208. The inner side of the sliding groove 208 is rotatably connected with a screw rod 207. One end of the screw rod 207 is connected to the power output end of the servo motor 206 arranged on the outside of the detection frame 201; the annular receiving belt is a covering surface for receiving light.

[0036] The servo motor 206 controls the convex lens 205 to move closer to and away from the infrared sensor 203 , thereby changing the focus of the light so that more light hits the detection head of the infrared sensor 203 .

[0037] One side of the tubular reflective layer 311 is a horizontal section, and the other side is an inclined section. The axis of the horizontal section passes through the glass cover 301 .

[0038] The infrared sensor 203 may adopt the model: JTGB-UF-7609 / X.

[0039] The specific implementation method is as follows: the concave reflector 1 302 and the concave reflector 2 303 form an annular belt-shaped, light-capturing structure. Since the axis of the horizontal section passes through the annular receiving belt and is completely blocked by the annular receiving belt, after the glass cover 301 rotates, the annular receiving belt will cover and sweep the entire space of the boiler in front. Two detection devices can be installed to eliminate the detection blind spot behind the bowl-shaped shell 304.

[0040] The device can cope with boilers of most shapes; the tubular reflective layer 311 can reflect light waves.

[0041] Specifically, the light passes through the glass cover 301 and hits the concave reflector 2 303, and is reflected by the concave reflector 2 303 and focused on the concave reflector 1 302. The concave reflector 1 302 reflects and focuses the light to the opening of the tubular reflective layer 311. After entering the tubular reflective layer 311, the light is reflected multiple times by the wall of the tubular reflective layer 311 and reaches the detection slot 202. The convex lens 205 focuses the light and finally hits the detection head of the infrared sensor 203. The infrared light therein will be detected, so that the combustion condition in the entire furnace can be judged by the detected infrared light condition.

[0042] The servo motor 206 controls the convex lens 205 to move closer to and away from the infrared sensor 203 , thereby changing the focus of the light so that more light hits the detection head of the infrared sensor 203 .

[0043] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A full furnace infrared flame detection device, characterized in that: include: A furnace wall (100) and a focusing groove (300), one end of the focusing groove (300) passes through the furnace wall (100) and extends into the inner side of the furnace chamber, the focusing groove (300) comprises a bowl-shaped shell (304), a concave reflector 2 (303) is arranged on the concave surface inside the bowl-shaped shell (304), a glass cover (301) is arranged on the bowl-shaped shell (304), and a center portion between the concave reflector 2 (303) and the bowl-shaped shell (304) is provided. A circular hole is opened in the bowl-shaped shell (304); an outer tube (305) is fixedly connected to the side of the bowl-shaped shell (304) away from the concave reflector 2 (303); a tubular reflective layer (311) is arranged on the inner circumference of the outer tube (305); one end of the tubular reflective layer (311) extends into the circular hole; a concave reflector 1 (302) is arranged in the middle of the glass cover (301); the concave reflector 1 (302) corresponds to the circular hole; The detection assembly (200) comprises a detection frame (201), the outer tube (305) extends into the detection slot (202), the detection slot (202) is provided in the middle of the detection frame (201), and the outer tube (305) is rotatably connected to the detection frame (201).

2. A full furnace infrared flame detection device according to claim 1, characterized in that: The focusing trough (300) further comprises a rotating frame (306) and an outer bracket (307); the furnace wall (100) is plugged with the outer bracket (307); the inner side of the outer bracket (307) is rotatably connected to the rotating frame (306); and the inner side of the rotating frame (306) is fixedly provided with an outer tube (305).

3. A full furnace infrared flame detection device according to claim 2, characterized in that: The focusing trough (300) further comprises a motor (308), a gear one (309) and a gear two (310); the outer bracket (307) is fixedly connected to the furnace wall (100); the outer bracket (307) is provided with a motor (308); the power end of the motor (308) is provided with a gear one (309); the rotating frame (306) is provided with a gear two (310); the gear two (310) is meshed with the gear one (309).

4. The full furnace infrared flame detection device according to claim 1, characterized in that: The outer tube (305) is in a bent shape.

5. The full furnace infrared flame detection device according to claim 1, characterized in that: The detection assembly (200) further comprises a movable frame (204) and a convex lens (205); an infrared sensor (203) is arranged on the detection frame (201); the infrared sensor (203) extends into the detection slot (202); the infrared sensor (203) corresponds to an opening of the tubular reflective layer (311); the inner cavity of the detection slot (202) is slidably connected with the movable frame (204); a convex lens (205) is arranged in the middle of the movable frame (204); the convex lens (205) corresponds to the opening of the tubular reflective layer (311).

6. A full furnace infrared flame detection device according to claim 5, characterized in that: The detection assembly (200) further comprises a servo motor (206), a screw rod (207) and a sliding groove (208); the inner top wall of the detection groove (202) is provided with a sliding groove (208); the inner side of the sliding groove (208) is rotatably connected to a screw rod (207); one end of the screw rod (207) is connected to a power output end of a servo motor (206) arranged on the outer side of the detection frame (201).

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