Double-channel boiler gas premixing device

Abstract

The utility model relates to gas premixing technical field especially is a kind of double-channel boiler gas premixing device, including premixing cavity, the side fixedly connected with conveying pipe of premixing cavity, the center place fixedly connected with connecting shell of conveying pipe, the utility model is moved by the pressure change brought by flame propagation to drive the baffle arranged in conveying pipe inside, the slider fixed in the one end of sliding rod is moved in the inside of sliding sleeve synchronously by the movement of baffle, the signal is conveyed to controller by the movement of slider to sensor, and finally through controller to start electric push rod, fixed frame fixed by electric push rod telescopic rod is moved by the extension of electric push rod, and this drives the fixed frame fixed by fixed frame to move to correct position and block flame, and then to a certain extent avoid the problem of porous flame arrester when not backfire phenomenon occurs, as far as possible to reduce the maintenance frequency of porous flame arrester.

Description

Technical Field

[0001] This utility model relates to the field of gas premixing technology, and in particular to a dual-channel boiler gas premixing device. Background Technology

[0002] Boiler gas premixing devices are key equipment in industrial and civil boiler systems. Their core function is to premix gas and air in a precise ratio before combustion to achieve efficient and clean combustion.

[0003] A boiler gas premixing device is a device that achieves efficient and clean combustion by precisely mixing gas and air. Its core components include a regulating valve, a fan, a mixing chamber, and a control system. It can improve thermal efficiency by 10-20% and reduce NOx emissions by more than 70%. It requires protection against backfire and deflagration and is suitable for industrial / commercial boilers, representing a key technology for meeting environmental emission standards.

[0004] However, the following problems were found in the implementation of the relevant technology: when the flow rate of the mixed fuel inside the mixing chamber is less than the propagation speed of the flame, backfire will occur. In order to avoid various damages caused by backfire, some fire prevention devices are usually installed inside the device. However, even if backfire does not occur normally, these fire prevention devices will also have problems over time and result in a deterioration of the fire prevention effect. In view of this, a dual-channel boiler gas premixing device is provided to overcome the above defects. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dual-channel boiler gas premixing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a dual-channel boiler gas premixing device, comprising a premixing chamber, a conveying pipe fixedly connected to one side of the premixing chamber, a connecting shell fixedly connected to the center of the conveying pipe, a controller fixedly connected to the top of the connecting shell, a fixing block fixedly connected to the inner side of the conveying pipe, a sliding sleeve provided on the inner side of the conveying pipe, a push plate provided on the inner side of the conveying pipe, a sliding rod slidably connected to the sliding sleeve, a sliding groove provided on the inner side of the sliding sleeve, a sensor fixedly connected to one end of the inner side of the sliding groove, an electric push rod fixedly connected to one side of the connecting shell, a fixing frame provided on the inner side of the connecting shell, and a multi-hole flame arrester provided on the inner side of the connecting shell.

[0007] As a further description of the above technical solution: there are two electric push rods, one end of the electric push rod sleeve is fixedly connected to one side of the connecting shell, and the telescopic rod of the electric push rod is slidably connected to the connecting shell, so as to facilitate the movement of the connecting shell by extending the electric push rod.

[0008] As a further description of the above technical solution: the upper and lower ends of the fixing frame are in contact with the upper and lower ends of the inner side of the connecting shell, the fixing frame is slidably connected to the inner wall of the connecting shell, and a porous flame arrester is fixedly connected to the inner side of the fixing frame, so as to facilitate the fixing of the porous flame arrester through the fixing frame.

[0009] As a further description of the above technical solution: there are two fixing blocks, the other side of the fixing block is fixedly connected to the side of the sliding sleeve, and one end of the sliding rod is fixedly connected to a push plate, so as to fix the push plate by setting the sliding rod.

[0010] As a further description of the above technical solution: a groove is provided on the inner side of the sliding sleeve, and a slider is fixedly connected to the other end of the sliding rod. The vertical cross-sectional shape of the slider matches the vertical cross-sectional shape of the groove. The slider and the groove are slidably connected, so that the sliding rod can be moved inside the sliding sleeve by sliding between the slider and the groove.

[0011] As a further description of the above technical solution: a return spring is provided on the inner side of the sliding sleeve. One end of the return spring is fixedly connected to one end of the slider, and the other end of the return spring is fixedly connected to one end of the inner side of the slide groove, so that the slider can be reset by the rebound action of the return spring.

[0012] As a further description of the above technical solution: the connecting shell has circular holes on its left and right sides, and the vertical cross-sectional shape of the circular holes on the left and right sides of the connecting shell matches the shape of the vertical cross-section of the inner wall of the conveying pipe. The conveying pipe is connected to the inner side of the connecting shell, which facilitates the delivery of the mixed gas to the inner side of the combustion chamber through the conveying pipe.

[0013] This utility model has the following beneficial effects:

[0014] This utility model designs a dual-channel boiler gas premixing device that integrates sensors, sliders, and electric push rods through a coordinated design. The pressure changes caused by flame propagation move a baffle located inside the delivery pipe. This movement of the baffle causes a slider fixed to one end of a sliding rod to move synchronously inside a sliding sleeve. The slider's movement sends a signal from the sensor to the controller, which then activates the electric push rod. The extension of the electric push rod moves a fixed frame attached to its telescopic rod, which in turn moves a perforated flame arrester fixed to the frame to the correct position to block the flame. This effectively prevents problems with the perforated flame arrester even when backfire has not occurred, minimizing maintenance frequency and extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded structural diagram of the conveying pipe of this utility model;

[0017] Figure 3 This is an exploded structural diagram of the fixing block of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the sliding sleeve of this utility model;

[0019] Figure 5 This is a cross-sectional structural diagram of the connecting shell of this utility model.

[0020] Legend:

[0021] 1. Premixing chamber; 2. Delivery pipe; 3. Connecting shell; 4. Push plate; 5. Controller; 6. Fixing block; 7. Sliding sleeve; 8. Sliding rod; 9. Slider; 10. Return spring; 11. Sensor; 12. Slide groove; 13. Fixing frame; 14. Perforated flame arrester; 15. Electric push rod. Detailed Implementation

[0022] Reference Figures 1 to 5 This utility model provides a dual-channel boiler gas premixing device, including a premixing chamber 1, a conveying pipe 2 fixedly connected to one side of the premixing chamber 1, a connecting shell 3 fixedly connected to the center of the conveying pipe 2, a controller 5 fixedly connected to the top of the connecting shell 3, a fixing block 6 fixedly connected to the inner side of the conveying pipe 2, a sliding sleeve 7 provided on the inner side of the conveying pipe 2, a push plate 4 provided on the inner side of the conveying pipe 2, a sliding rod 8 slidably connected to the sliding sleeve 7, a sliding groove 12 opened on the inner side of the sliding sleeve 7, a sensor 11 fixedly connected to one end of the inner side of the sliding groove 12, an electric push rod 15 fixedly connected to one side of the connecting shell 3, a fixing frame 13 provided on the inner side of the connecting shell 3, and a multi-hole flame arrester 14 provided on the inner side of the connecting shell 3. This utility model uses fire The pressure changes caused by flame propagation cause the baffle installed inside the delivery pipe 2 to move. The movement of the baffle causes the slider 9 fixed at one end of the sliding rod 8 to move synchronously inside the sliding sleeve 7. The movement of the slider 9 causes the sensor 11 to transmit a signal to the controller 5, and finally the controller 5 activates the electric push rod 15. The extension of the electric push rod 15 causes the fixed frame 13 fixed to the extension rod of the electric push rod 15 to move, and thus causes the porous flame arrester 14 fixed to the fixed frame 13 to move to the correct position and block the flame. This, to a certain extent, avoids problems with the porous flame arrester 14 when backfire does not occur, minimizes the number of maintenance times of the porous flame arrester 14, and improves its service life.

[0023] As a further description of the above technical solution: there are two electric push rods 15. One end of the electric push rod 15 is fixedly connected to one side of the connecting shell 3. The telescopic rod of the electric push rod 15 is slidably connected to the connecting shell 3, so that the connecting shell 3 can be moved by the extension of the electric push rod 15.

[0024] As a further description of the above technical solution: the upper and lower ends of the fixing frame 13 are in contact with the upper and lower ends of the inner side of the connecting shell 3, the fixing frame 13 is slidably connected to the inner wall of the connecting shell 3, and the inner side of the fixing frame 13 is fixedly connected to the porous flame arrester 14, so that the porous flame arrester 14 can be fixed by the fixing frame 13.

[0025] As a further description of the above technical solution: there are two fixing blocks 6, the other side of the fixing block 6 is fixedly connected to the side of the sliding sleeve 7, and one end of the sliding rod 8 is fixedly connected to the push plate 4, so as to fix the push plate 4 by setting the sliding rod 8.

[0026] As a further description of the above technical solution: a groove 12 is provided on the inner side of the sliding sleeve 7, and a slider 9 is fixedly connected to the other end of the sliding rod 8. The vertical cross-sectional shape of the slider 9 matches the vertical cross-sectional shape of the groove 12. The slider 9 and the groove 12 are slidably connected, so that the sliding rod 8 can be moved inside the sliding sleeve 7 by sliding between the slider 9 and the groove 12.

[0027] As a further description of the above technical solution: a return spring 10 is provided on the inner side of the sliding sleeve 7. One end of the return spring 10 is fixedly connected to one end of the slider 9, and the other end of the return spring 10 is fixedly connected to one end of the inner side of the slide groove 12, so that the slider 9 can be reset by the rebound action of the return spring 10.

[0028] As a further description of the above technical solution: circular holes are provided on the left and right sides of the connecting shell 3. The vertical cross-sectional shape of the circular holes on the left and right sides of the connecting shell 3 matches the vertical cross-sectional shape of the inner wall of the conveying pipe 2. The conveying pipe 2 is connected to the inner side of the connecting shell 3, which facilitates the delivery of the mixed gas to the inside of the combustion chamber through the conveying pipe 2.

[0029] Working principle:

[0030] When using this invention, the gas first undergoes thorough mixing with air inside the premixing chamber 1. After mixing, the mixed gas is transported along the conveying pipe 2 to the inside of the combustion chamber for combustion. A fixing block 6 is fixedly connected to the inside of the conveying pipe 2. The sides of the fixing block 6 are respectively fixed to the inner wall of the conveying pipe 2 and the side of the sliding sleeve 7 located inside the conveying pipe 2. The fixing block 6 can effectively fix the sliding sleeve 7 to the inside of the conveying pipe 2. A sliding groove 12 is provided on the inside of the sliding sleeve 7. A sensor 11 is fixedly connected to one end of the sliding groove 12. The sensor 11 is a laser sensor 11. A slider 9 is provided on the inside of the sliding groove 12. The slider 9 and the sliding sleeve 9 are connected to the sliding sleeve 7. The groove 12 slides, and one end of the slider 9 is fixedly connected to a sliding rod 8, while the other end of the sliding rod 8 is located outside the sliding sleeve 7. A push plate 4 is fixedly connected to the other end of the sliding rod 8. A connecting shell 3 is fixedly located at the center of the conveying pipe 2, and a controller 5 is fixedly connected to the top of the connecting shell 3. When the pressure inside the combustion chamber exceeds the pressure of the mixed gas conveyed by the conveying pipe 2, the flame inside the combustion chamber moves along the conveying pipe 2 towards the mixing chamber. Simultaneously, the combustion chamber releases pressure towards the inside of the conveying pipe 2. Upon receiving the pressure released by the combustion chamber, the push plate 4 moves accordingly towards the inside of the sliding sleeve 7. When the sensor 11 inside the moving sleeve 7 detects a change in the distance to the slider 9, it will activate in time and send a signal to the controller 5. Upon receiving the signal, the controller 5 will activate the electric push rod 15 accordingly. By activating the electric push rod 15, the telescopic rod of the electric push rod 15 will move inside the connecting shell 3. One end of the telescopic rod of the electric push rod 15 is fixedly connected to a fixed frame 13. A perforated flame arrester 14 is fixedly connected to the inside of the fixed frame 13. By moving the fixed frame 13 under the push of the electric push rod 15, the perforated flame arrester 14 is indirectly moved synchronously to the circular hole connecting the conveying pipe 2 and the connecting shell 3, and the perforated flame arrester 14 will... The connection between the delivery pipe 2 and the connecting shell 3 is blocked, causing the backflowing flame to come into direct contact with the porous flame arrester 14. When the porous flame arrester 14 comes into contact with the flame, the flame will enter the inner side of the porous flame arrester 14 through the round holes on the porous flame arrester 14. Because the diameter of the round holes on the porous flame arrester 14 is too small and the round holes have a three-dimensional structure, the flame that enters the inner side of the porous flame arrester 14 will be gradually divided and consumed, thereby preventing the flame from spreading. In this way, the porous flame arrester 14 reduces the possibility of backfire in the combustion chamber, avoids backfire and prevents problems from occurring in other components of the device.

[0031] In this utility model, the reset spring 10, controller 5, sensor 11 and other components are all existing technologies, and their working principle is consistent with that of similar products on the market, so they will not be described in detail here.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-channel boiler gas premixing device, comprising a premixing chamber (1), characterized in that: A conveying pipe (2) is fixedly connected to one side of the premixing chamber (1). A connecting shell (3) is fixedly connected to the center of the conveying pipe (2). A controller (5) is fixedly connected to the top of the connecting shell (3). A fixing block (6) is fixedly connected to the inner side of the conveying pipe (2). A sliding sleeve (7) is provided on the inner side of the conveying pipe (2). A push plate (4) is provided on the inner side of the conveying pipe (2). A sliding rod (8) is slidably connected to the sliding sleeve (7). A sliding groove (12) is opened on the inner side of the sliding sleeve (7). A sensor (11) is fixedly connected to one end of the inner side of the sliding groove (12). An electric push rod (15) is fixedly connected to one side of the connecting shell (3). A fixing frame (13) is provided on the inner side of the connecting shell (3). A multi-hole flame arrester (14) is provided on the inner side of the connecting shell (3).

2. The dual-channel boiler gas premixing device according to claim 1, characterized in that: There are two electric push rods (15). One end of the sleeve of the electric push rod (15) is fixedly connected to one side of the connecting shell (3), and the telescopic rod of the electric push rod (15) is slidably connected to the connecting shell (3).

3. The dual-channel boiler gas premixing device according to claim 1, characterized in that: The upper and lower ends of the fixed frame (13) are in contact with the upper and lower ends of the inner side of the connecting shell (3). The fixed frame (13) is slidably connected to the inner wall of the connecting shell (3). A multi-hole flame arrester (14) is fixedly connected to the inner side of the fixed frame (13).

4. The dual-channel boiler gas premixing device according to claim 1, characterized in that: There are two fixing blocks (6). The other side of the fixing block (6) is fixedly connected to the side of the sliding sleeve (7). One end of the sliding rod (8) is fixedly connected to a push plate (4).

5. A dual-channel boiler gas premixing device according to claim 1, characterized in that: The inner side of the sliding sleeve (7) is provided with a sliding groove (12), and the other end of the sliding rod (8) is fixedly connected to a slider (9). The vertical cross-sectional shape of the slider (9) matches the vertical cross-sectional shape of the sliding groove (12), and the slider (9) is slidably connected to the sliding groove (12).

6. A dual-channel boiler gas premixing device according to claim 1, characterized in that: A return spring (10) is provided on the inner side of the sliding sleeve (7). One end of the return spring (10) is fixedly connected to one end of the slider (9), and the other end of the return spring (10) is fixedly connected to one end of the inner side of the slide groove (12).

7. A dual-channel boiler gas premixing device according to claim 1, characterized in that: The connecting shell (3) has round holes on its left and right sides. The vertical cross-sectional shape of the round holes on the left and right sides of the connecting shell (3) matches the vertical cross-sectional shape of the inner wall of the conveying pipe (2). The conveying pipe (2) is connected to the inner side of the connecting shell (3).

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