Internal pressure detection device for low-nitrogen combustor

Abstract

The utility model relates to the technical field of low-nitrogen combustors, and provides a low-nitrogen combustor internal pressure detection device which comprises a multilateral lantern ring assembly, a plurality of triangular turning plates and a force detection mechanism, the multilateral lantern ring assembly is fixedly arranged on one side, close to a ventilation pipeline, of a primary air pipe and a secondary air pipe, and the triangular turning plates are arranged on the multilateral lantern ring assembly. The multiple triangular turning plates are rotationally connected to the multilateral lantern ring assembly, the multiple triangular turning plates are arranged in the primary air pipe and surround the primary air pipe in a circumferential mode, the multiple side edge contact strength detection mechanisms of the adjacent triangular turning plates are arranged, and the multiple strength detection mechanisms are fixedly connected to the multilateral lantern ring assembly. By means of the technical scheme, the problem that in the prior art, when airflow flows unstably, the real gas pressure is difficult to measure is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to low nitrogen combustor technical field, specifically, relate to a low nitrogen combustor internal pressure detection device. BACKGROUND

[0002] Low nitrogen combustor is a kind of key equipment that significantly reduces nitrogen oxides emission by optimizing combustion process, is widely used in the industrial scene needing high-temperature combustion and needing to meet environmental protection standard, for example, gas boiler, oil boiler etc., mainly for providing steam or hot water for heating, power generation etc., low nitrogen combustor reduces nitrogen oxides emission by carrying out staged combustion, flue gas recirculation, premixed combustion etc., on the one hand, reaches the effect of environmental protection and emission reduction, while can reduce the waste of fuel, and low nitrogen combustor is internally provided with air staging system, so that air and fuel are uniformly mixed.

[0003] The application number CN202122994536.8 discloses a kind of low nitrogen combustor internal pressure detection device, including pipeline assembly, fixed sheet is arranged on pipeline assembly with force-sensitive resistance connection, when low nitrogen combustor is used, gas flow in pipeline assembly is blown to fixed sheet, and the gas flow rate in pipeline assembly is judged by the detection of force-sensitive resistance to gas flow rate.

[0004] Low nitrogen combustor's pipeline assembly usually will be provided with primary air duct and secondary air duct, primary air duct is inner layer air duct, secondary air duct is outer layer air duct, through the layout of two air ducts, different functions are also different, when using, different positions of fuel nozzle are mixed with fuel and air according to demand, but the existing detection device is detected by the gas flow in the whole pipeline assembly, and when the gas flow in pipeline assembly exists fluctuation or disturbance, the contact of gas flow and fixed sheet is not sufficient, so that the wind speed measured by force-sensitive resistance is difficult to reflect the real wind speed pressure. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of low nitrogen combustor internal pressure detection device, solve the problem that when gas flow is unstable flow, real gas pressure is difficult to determine in prior art.

[0006] The technical scheme of the utility model is as follows:

[0007] The low-nitrogen burner internal pressure detection device, including the air pipe, the air pipe is connected with the external fan air outlet, the air pipe is fixedly connected with the primary air pipe and the secondary air pipe, the secondary air pipe is sleeved on the primary air pipe, a plurality of fuel pipes are arranged between the primary air pipe and the secondary air pipe, further comprising a multi-edge sleeve ring assembly, a triangular flap and a force detection mechanism, the multi-edge sleeve ring assembly is fixedly arranged on the primary air pipe and the secondary air pipe on the side close to the air pipe, the multi-edge sleeve ring assembly is used for conveniently arranging the triangular flap, so as to avoid the gap during the air flow pressure test, and the measurement result is influenced, the triangular flap is provided with a plurality of triangular flaps, the triangular flaps are rotatably connected to the multi-edge sleeve ring assembly, and the triangular flaps are arranged in the primary air pipe and between the primary air pipe and the secondary air pipe, the triangular flaps are arranged in a circumferential ring around the primary air pipe, the triangular flaps are used for being contacted with air flow and rotating under the blowing of air flow, and pressure test is carried out, the side edges of adjacent triangular flaps are contacted, the force detection mechanism is provided with a plurality of force detection mechanisms, the force detection mechanisms are fixedly connected to the multi-edge sleeve ring assembly, and the force detection mechanisms are rotatably connected to the triangular flaps, and the force detection mechanisms are used for detecting the rotating force of the triangular flaps.

[0008] Preferably, the multi-edge sleeve ring assembly comprises a multi-edge sleeve ring one and a multi-edge sleeve ring two, the multi-edge sleeve ring one is fixedly connected in the primary air pipe, a plurality of the triangular flaps and the force detection mechanism are circumferentially arranged on the multi-edge sleeve ring one, the multi-edge sleeve ring two is fixedly connected in the secondary air pipe, and a plurality of the triangular flaps and the force detection mechanism are circumferentially arranged on the multi-edge sleeve ring two.

[0009] Further, the force detection mechanism comprises a supporting rod, a sliding block, a sliding groove and a distance sensor, the supporting rod is rotatably connected to one side of the triangular flap away from the air pipe, the sliding block is rotatably connected to one side of the supporting rod away from the triangular flap, a plurality of the sliding grooves are formed in the multi-edge sleeve ring one and the multi-edge sleeve ring two, the sliding block is slidably connected in the sliding groove, the sliding groove is provided with a spring, and the distance sensor is fixedly connected to one end of the sliding groove away from the triangular flap; the distance sensor measures the sliding distance of the sliding block, and then measures the air flow thrust received by the triangular flap.

[0010] Still further, a U-shaped groove matched with the fuel pipe is formed in part of the triangular flaps staggered with the fuel pipe, the opening direction of the U-shaped groove is towards the center of the primary air pipe, the U-shaped groove can avoid the influence of the fuel pipe on the rotation of the triangular flap, and the triangular flap can be adjusted according to the different layout of the fuel pipe.

[0011] On the basis of the foregoing scheme, the primary air pipe and the secondary air pipe are fixedly connected with a limiting block, the limiting block is arranged on one side of the triangular flap close to the ventilation pipeline, and the limiting block can contact the triangular flap.

[0012] On the basis of the foregoing scheme, the primary air pipe is centrally provided with a closed ring I corresponding to the U-shaped groove in the primary air pipe, the outer side of the primary air pipe is fixedly connected with a closed ring II corresponding to the U-shaped groove on the triangular flap rotatably connected to the secondary air pipe, and the closed ring I and the closed ring II are arranged on one side of the triangular flap close to the ventilation pipeline.

[0013] The working principle and beneficial effects of the utility model are as follows:

[0014] 1、The utility model discloses a triangular flap is set up, and multiple triangular flaps are circumferentially formed into a ring, the airflow in the ventilation pipeline is hindered, so that the airflow passing through needs to push the triangular flap to rotate, when the airflow is unstable, the last pressure measurement result can be obtained through the data measured at multiple triangular flaps by algorithm, and the inaccurate measurement caused by airflow disturbance is avoided.

[0015] 2、The utility model discloses a triangular flap is set up, so that the airflow passing through each position can be measured, the U-shaped groove, the closed ring I and the closed ring II are arranged, so that the triangular flap is not influenced by the fuel pipe when rotating, and the U-shaped groove also avoids influencing the airflow pressure detection. DRAWINGS

[0016] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0017] Fig. 1 It is the overall structure schematic view in the utility model;

[0018] Fig. 2 It is the internal structure schematic view of the ventilation pipeline in the utility model;

[0019] Fig. 3 It is the structure schematic view of the fuel pipe and the polygonal sleeve ring assembly cooperation in the utility model;

[0020] Fig. 4 It is the structure schematic view of the triangular flap and the polygonal sleeve ring assembly cooperation in the utility model;

[0021] Fig. 5The utility model discloses a force detection mechanism and the structure schematic diagram of cooperation of triangular flap in the utility model.

[0022] Fig. 6 The utility model discloses the partial internal structure schematic diagram of chute.

[0023] In the drawing: 1, air duct, 2, primary air pipe, 3, secondary air pipe, 4, fuel pipe, 5, triangular flap, 6, multilateral collar one, 7, multilateral collar two, 8, brace, 9, sliding block, 10, chute, 11, spring, 12, distance sensor, 13, U groove, 14, limit block, 15, closed ring one, 16, closed ring two. Specific implementation

[0024] The technical scheme in the embodiments of the utility model will be apparently and completely described below in conjunction with the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are involved in the protection scope of the utility model.

[0025] As Figs. 1-6 The utility model discloses a low nitrogen burner internal pressure detection device, including air duct 1, air duct 1 with outside fan outlet intercommunication, fixedly connected with primary air pipe 2 and secondary air pipe 3 on air duct 1, the secondary air pipe 3 is set up on primary air pipe 2, and a plurality of fuel pipes 4 are arranged between primary air pipe 2 and secondary air pipe 3, still including multilateral collar assembly, triangular flap 5 and force detection mechanism, multilateral collar assembly is fixedly set up on the one side of primary air pipe 2 and secondary air pipe 3 near air duct 1, and triangular flap 5 is set up with a plurality of, a plurality of triangular flap 5 is rotatably connected on multilateral collar assembly, and a plurality of triangular flap 5 is arranged in primary air pipe 2 and between primary air pipe 2 and secondary air pipe 3 respectively, and triangular flap 5 is arranged in circumferential ring around primary air pipe 2, and the side of adjacent triangular flap 5 is contacted, and force detection mechanism is set up with a plurality of, and a plurality of force detection mechanism is fixedly connected on multilateral collar assembly respectively, and the rotatable connection of force detection mechanism is arranged on each triangular flap 5, and the air duct 1 is blocked by the baffle that a plurality of triangular flap 5 surrounds, and when low nitrogen burner starts, outside fan sends gas to air duct 1, and airflow is delivered to primary air pipe 2 and secondary air pipe 3, and airflow drives triangular flap 5 to rotate, and according to the intensity of airflow, the angle of reaction of triangular flap 5 is different, and then the size of airflow velocity is judged, compared with prior art, the determination of airflow velocity is carried out to airflow resistance by a plurality of triangular flap 5, and then pressure is judged, can avoid airflow disturbance and make airflow velocity different in different positions to influence overall measurement result, and the measurement data of a plurality of triangular flap 5 are measured, and the overall pressure is obtained by algorithm, and the precision is higher, and is not easily influenced.

[0026] As Figs. 1-4 shown, the multi-edge collar assembly includes a multi-edge collar one 6 and a multi-edge collar two 7, the multi-edge collar one 6 is fixedly connected inside the primary air pipe 2, a plurality of triangular flaps 5 and force detection mechanisms are circumferentially arranged on the multi-edge collar one 6, the multi-edge collar two 7 is fixedly connected inside the secondary air pipe 3, a plurality of triangular flaps 5 and force detection mechanisms are circumferentially arranged on the multi-edge collar two 7, the inner circle of the multi-edge collar one 6 and the multi-edge collar two 7 is set as a polygon, one triangular flap 5 and one force detection mechanism are arranged on each straight side of the polygon, through the structure of the polygon, the gap between the triangular flap 5 and the multi-edge collar one 6 and the multi-edge collar two 7 when rotating and not rotating can be small, which can improve the accuracy of detecting the air flow speed.

[0027] As Figs. 5-6 shown, the force detection mechanism includes a support rod 8, a sliding block 9, a sliding groove 10 and a distance sensor 12, the support rod 8 is rotatably connected to the side of the triangular flap 5 away from the air duct 1, the sliding block 9 is rotatably connected to the side of the support rod 8 away from the triangular flap 5, a plurality of sliding grooves 10 are formed on the multi-edge collar one 6 and the multi-edge collar two 7, the sliding block 9 is slidably connected in the sliding groove 10, a spring 11 is arranged in the sliding groove 10, the distance sensor 12 is fixedly connected to the end of the sliding groove 10 away from the triangular flap 5, when the triangular flap 5 is blown and rotated by the air flow, the support rod 8 is pushed, the sliding block 9 is slid in the sliding groove 10 and the spring 11 is extruded, at this time, the sliding block 9 slides towards the distance sensor 12, the distance sensor 12 can use a Hall sensor or other sensor that can detect the sliding distance of the sliding block 9, the compression of the spring 11 by the sliding block 9 gradually increases the elasticity of the spring 11, thereby measuring the speed and pressure of the air flow, when not in use, the elasticity of the spring 11 pushes the sliding block 9 to slide, thereby pushing the support rod 8 to push the triangular flap 5 back to the original position.

[0028] As Fig. 2 and Fig. 4 shown, the primary air pipe 2 and the secondary air pipe 3 are fixedly connected with a limiting block 14, the limiting block 14 is arranged on the side of the triangular flap 5 close to the air duct 1, the limiting block 14 can contact the triangular flap 5, through the limiting block 14, the rotation of the triangular flap 5 can be limited, preventing the triangular flap 5 from rotating towards the air duct 1 when pushed by the spring 11, so that the triangular flap 5 always remains perpendicular to the primary air pipe 2 when the low-nitrogen burner is not in use, which can more directly contact the air flow.

[0029] As Figs. 4-5As shown, the part of the plurality of triangular flaps 5 intersecting with the fuel pipe 4 is provided with a U-shaped groove 13 matched with the fuel pipe 4, the opening direction of the U-shaped groove 13 is towards the center of the primary air pipe 2, the primary air pipe 2 is provided with a closed ring I 15 in the center, the closed ring I 15 corresponds to the U-shaped groove 13 in the primary air pipe 2, the outer side of the primary air pipe 2 is fixedly connected with a closed ring II 16, the closed ring II 16 corresponds to the U-shaped groove 13 on the triangular flap 5 rotatably connected to the secondary air pipe 3, the closed ring I 15 and the closed ring II 16 are arranged on the side of the triangular flap 5 close to the air duct 1, the arrangement of the U-shaped groove 13 can avoid the contact between the triangular flap 5 and the fuel pipe 4, and the position of the fuel pipe 4 does not need to be adjusted, when the triangular flap 5 rotates, the U-shaped groove 13 slides and intersects with the fuel pipe 4, but due to the arrangement of the U-shaped groove 13, the area of the triangular flap 5 provided with the U-shaped groove 13 is different from that of other triangular flaps 5, which may affect the contact with the airflow, the closed ring I 15 and the closed ring II 16 shield the U-shaped groove 13, so that the airflow needs to flow in the position without the closed ring I 15 and the closed ring II 16, and blows the position of the triangular flap 5 without the U-shaped groove 13 to make it rotate, thereby reducing the difference in the rotation angle between different triangular flaps 5, and avoiding the large flow of gas through the U-shaped groove 13, thereby reducing the pressure measurement accuracy.

[0030] In this embodiment, when the low-nitrogen burner is used, the external fan blows gas into the air duct 1, the airflow enters the primary air pipe 2 and the secondary air pipe 3, enters the primary air pipe 2 through the gap between the closed ring I 15 and the primary air pipe 2, and enters the secondary air pipe 3 through the gap between the closed ring II 16 and the secondary air pipe 3, and blows the triangular flap 5 to make the triangular flap 5 rotate, the triangular flap 5 pushes the supporting rod 8, the supporting rod 8 pushes the sliding block 9, the sliding block 9 extrudes the spring 11, and the distance detector detects the sliding distance of the sliding block 9 to calculate the airflow velocity and pressure.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low-nitrogen burner internal pressure detection device, comprising a ventilation pipeline (1) which is communicated with an air outlet of an external fan, a primary air pipeline (2) and a secondary air pipeline (3) are fixedly connected on the ventilation pipeline (1), the secondary air pipeline (3) is sleeved on the primary air pipeline (2), and a plurality of fuel pipelines (4) are arranged between the primary air pipeline (2) and the secondary air pipeline (3), characterized in that, Also include: Multi-edge collar assembly, fixedly arranged on the primary air pipe (2) and the secondary air pipe (3) on the side close to the ventilation pipeline (1); Triangular flap (5) is provided with a plurality of, a plurality of the triangular flap (5) is rotatably connected to the multi-edge collar assembly, a plurality of the triangular flap (5) is arranged in the primary air pipe (2) and between the primary air pipe (2) and the secondary air pipe (3), the triangular flap (5) is circumferentially arranged around the primary air pipe (2), the side of adjacent triangular flap (5) is in contact; Force detection mechanism, provided with a plurality of, a plurality of the force detection mechanism is respectively fixedly connected to the multi-edge collar assembly, each the triangular flap (5) is rotatably connected with the force detection mechanism.

2. The low NOx combustor internal pressure detection apparatus according to claim 1, wherein The multi-edge collar assembly includes: Multi-edge collar one (6) is fixedly connected in the primary air pipe (2), a plurality of the triangular flap (5) and the force detection mechanism is circumferentially arranged on the multi-edge collar one (6); Multi-edge collar two (7) is fixedly connected in the secondary air pipe (3), a plurality of the triangular flap (5) and the force detection mechanism is circumferentially arranged on the multi-edge collar two (7).

3. The low NOx combustor internal pressure detection apparatus according to claim 2, wherein The force detection mechanism includes: Supporting rod (8) is rotatably connected with the side of the triangular flap (5) away from the ventilation pipeline (1); Sliding block (9) is rotatably connected with the side of the supporting rod (8) away from the triangular flap (5); Slide groove (10), the multi-edge collar one (6) and the multi-edge collar two (7) are both provided with a plurality of the slide groove (10), the sliding block (9) is slidably connected in the slide groove (10), the slide groove (10) is provided with a spring (11); Distance sensor (12) is fixedly connected on the end of the slide groove (10) away from the triangular flap (5).

4. The low NOx combustor internal pressure detection apparatus according to claim 1, wherein A plurality of the triangular flap (5) in the part of the triangular flap (5) staggered with the fuel pipe (4), the triangular flap (5) is provided with a U-shaped groove (13) matched with the fuel pipe (4), the opening direction of the U-shaped groove (13) is towards the center of the primary air pipe (2).

5. The low NOx combustor internal pressure detection apparatus according to claim 1, wherein The primary air pipe (2) and the secondary air pipe (3) are fixedly connected with a limiting block (14), the limiting block (14) is arranged on the side of the triangular flap (5) close to the ventilation pipeline (1), the limiting block (14) can be in contact with the triangular flap (5).

6. The low NOx combustor internal pressure detection apparatus according to claim 4, wherein The primary air pipe (2) is provided with a closed ring one (15) in the center, the closed ring one (15) corresponds to the U-shaped groove (13) in the primary air pipe (2), the outer side of the primary air pipe (2) is fixedly connected with a closed ring two (16), the closed ring two (16) corresponds to the U-shaped groove (13) on the triangular flap (5) rotatably connected on the secondary air pipe (3), the closed ring one (15) and the closed ring two (16) are arranged on the side of the triangular flap (5) close to the ventilation pipeline (1).

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