Fuel oil flow regulating valve of combustor

Abstract

The fuel oil flow adjusting valve comprises a valve element with a fuel oil inlet and a fuel oil outlet, an adjusting rod rotationally connected with the valve element and an electric actuator connected with the second end of the adjusting rod, the first end of the adjusting rod is arranged in the valve element, a notch is formed in the side wall of the adjusting rod, and a flowing channel for oil inlet is formed between the notch and the fuel oil inlet. During use, the electric actuator drives the adjusting rod to rotate to adjust the circulation area of the circulation channel, and compared with adjustment through an elastic piece in the prior art, adjustment through the electric actuator is more stable and high in precision.

Description

TECHNICAL FIELD

[0001] The present application generally relates to the technical field of flow regulation, and particularly relates to a fuel flow regulating valve of a burner. BACKGROUND

[0002] An atomized burner is a device for converting liquid fuel (such as oil or gas) into fine droplets and combusting the fuel after mixing with air; existing asphalt mixing stations usually use mechanical atomized burners or air atomized burners; for fuel oil, the burner generally adopts an air atomization method for fuel combustion, although air atomization has a wide range of applications and good atomization effect, but it generally requires additional devices such as air compressors and gas storage tanks, which increases the use cost; when the fuel oil is light oil or good quality heavy oil, a mechanical atomization method is used.

[0003] In the existing mechanical atomized burner, a cam rack structure is driven by a servo deceleration motor to adjust the air-oil ratio; the current mechanical atomized oil pressure regulation requires high precision to ensure the combustion efficiency; and the existing technology adjusts the opening of the fuel inlet by using an elastic member to achieve oil pressure regulation; but the spring force is not easy to control, resulting in low regulation precision and inability to achieve high-precision oil pressure regulation within a certain cross-sectional area. SUMMARY

[0004] In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a fuel flow regulating valve of a burner that can solve the above-mentioned technical problems.

[0005] The present application provides a fuel flow regulating valve of a burner, comprising:

[0006] A valve body, an inner part of the valve body is provided with a cylindrical valve core, and the valve core is provided with a fuel inlet and a fuel outlet on both sides along a first direction;

[0007] An adjusting rod, the adjusting rod has a first end and a second end along a second direction, the first end is rotationally arranged in the valve core, and a cutout is arranged on a side wall of the first end; the cutout and the fuel inlet form a flow passage for oil; and the second direction is perpendicular to the first direction;

[0008] An electric actuator, the electric actuator is arranged on one side of the valve body along the second direction, a driving end of the electric actuator is fixedly connected with the second end, and the electric actuator is used to drive the adjusting rod to rotate to adjust a flow area of the flow passage.

[0009] According to the technical scheme provided by the present application, the cutout has an included angle between an extension direction and the second direction, an opening of the included angle is away from the second end side, and the included angle is an acute angle.

[0010] According to the technical solution provided in the present application, a connecting bracket is arranged between the electric actuator and the valve body, and the interior of the connecting bracket has a first space; the second end is arranged in the first space; the driving end of the electric actuator extends into the first space and is connected to the second end; a display device is arranged in the first space, and the display device is used to display the rotation angle of the adjusting rod.

[0011] According to the technical solution provided in this application, a coupling is provided between the driving end and the second end of the electric actuator.

[0012] According to the technical solution provided in this application, the display device includes: a dial and a pointer, the dial is arranged on the side wall of the first space close to the electric actuator, and the dial is provided with a scale; the pointer is an L-shaped structure, one end of the pointer is fixed on the coupling, and the other end of the pointer points to the dial.

[0013] According to the technical solution provided in the present application, a fine-tuning assembly is provided at one end of the valve body away from the electric actuator, and the fine-tuning assembly is used to drive the valve core to move along the second direction within the valve body.

[0014] According to the technical solution provided in the present application, the fine-tuning assembly includes: a first end cover, a fine-tuning screw, and an end cap; the first end cover is fixed to one end of the valve body away from the electric actuator, and the middle part of the first end cover is penetrated by the fine-tuning screw along the second direction. The fine-tuning screw is rotatably connected to the first end cover, one end of the fine-tuning screw is threadedly connected to the valve core, and the other end of the fine-tuning screw extends out of the valve body and is fixedly connected to the end cap.

[0015] According to the technical solution provided in the present application, a locking bolt is threadedly connected to the valve body, and the locking bolt extends along a third direction. One end of the locking bolt is located outside the valve body, and the other end of the locking bolt abuts against the valve core; the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0016] According to the technical solution provided in the present application, the coupling and the second end are connected through a fastening assembly, and the fastening assembly includes: a flat key and a fastening screw; the flat key is arranged on the inner wall of the coupling, and a flat key hole is provided on the adjusting rod corresponding to the flat key, and the flat key is connected to the flat key hole; and the adjusting rod and the coupling are fixedly connected by a fastening screw.

[0017] The beneficial effects of this application are:

[0018] The application provides a fuel flow regulating valve of a burner, which comprises a valve core with a fuel inlet and a fuel outlet, a regulating rod in rotational connection with the valve core, an electric actuator connected with the second end of the regulating rod, and the first end of the regulating rod is arranged in the valve core and is provided with a cutout on the side wall, and the cutout and the fuel inlet form a flow passage for fuel, and in use, the flow passage area is regulated by rotating the regulating rod driven by the electric actuator, and the electric actuator is more stable and has high precision compared with the elastic member in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0020] Figure 1 is a sectional view of a fuel flow regulating valve of a burner provided by the application;

[0021] Figure 2 is a top view of a fuel flow regulating valve of a burner provided by the application;

[0022] Figure 3 is a schematic view of a fuel flow regulating valve of a burner provided by the application;

[0023] Figure 4 is a schematic view of the connection between the regulating rod and the valve core provided by the application;

[0024] Figure 5 is a schematic view of the connection between the regulating rod and the valve core provided by the application;

[0025] Figure 6 is a schematic view of the regulating rod provided by the application.

[0026] In the drawings: 1, valve body; 2, valve core; 3, fuel inlet; 4, fuel outlet; 5, fuel inlet pipe; 6, fuel outlet pipe; 7, regulating rod; 8, cutout; 9, connecting bracket; 10, dial; 11, pointer; 12, electric actuator; 13, shaft coupling; 14, first end cover; 15, fine adjustment screw; 16, end cap; 17, locking bolt; 18, flat key; 19, shaft sleeve; 20, O-shaped sealing ring; 21, second end cover. DETAILED DESCRIPTION

[0027] The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description.

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] Embodiment 1

[0030] Please refer to Figures 1-6 The present application provides a fuel flow regulating valve of a burner, which comprises:

[0031] A valve body 1, which is internally provided with a cylindrical valve core 2, and the valve core 2 is respectively provided with a fuel inlet 3 and a fuel outlet 4 on both sides along a first direction;

[0032] An adjusting rod 7, which has a first end and a second end along a second direction, the first end is rotationally arranged in the valve core 2, and a cutout 8 is arranged on the side wall of the first end; the cutout 8 and the fuel inlet 3 form a flow passage for oil inflow; the second direction is perpendicular to the first direction;

[0033] An electric actuator 12, which is arranged on one side of the valve body 1 along the second direction, and the driving end of the electric actuator 12 is fixedly connected with the second end, and the electric actuator 12 is used for driving the adjusting rod 7 to rotate to adjust the flow area of the flow passage.

[0034] Specifically, as shown in Figure 1 and Figure 2 , in the figure: a is the first direction, b is the second direction, and c is the third direction; in the present embodiment, the first direction is the horizontal direction, the second direction is the horizontal direction, and the third direction is the vertical direction;

[0035] Specifically, the adjustment of the burner air-fuel ratio is very important for combustion, which includes the adjustment of oil pressure and fan pressure; the fuel flow regulating valve provided in the present embodiment is used for adjusting the oil pressure, and the fan pressure is realized by frequency conversion or damper adjustment;

[0036] Specifically, the valve body 1 is respectively provided with an oil inlet pipe 5 in communication with the fuel inlet 3 and an oil outlet pipe 6 in communication with the fuel outlet 4; the fuel flows into the fuel inlet 3 from the oil inlet pipe 5, and flows out of the oil outlet pipe 6 after flowing through the fuel outlet 4;

[0037] Specifically, the valve core 2 is further provided with exhaust holes in communication with the fuel inlet 3 and the fuel outlet 4 at both ends along the second direction, and the exhaust holes are used for balancing the oil pressure at both ends of the valve core 2 to avoid the movement of the valve core 2 due to large pressure difference, thereby affecting the adjustment accuracy;

[0038] In this embodiment, a second end cover 21 is provided at one end of the valve body 1 near the electric actuator 12, and the adjusting rod 7 is rotatably connected to the valve body 1 through the second end cover 21; a shaft sleeve 19 is also sleeved on the adjusting rod 7, and the adjusting rod 7 is rotatably connected to the shaft sleeve 19, and one end of the shaft sleeve 19 is fixedly connected to the valve body 1, and the shaft sleeve 19 is used to prevent the adjusting rod 7 from shifting during operation; since the fuel is highly corrosive and the oil pressure in the valve body 1 is relatively high, the sealing requirements of the valve body 1 are relatively high. Therefore, this application provides O-rings 20 between the second end cover 21 and the valve body 1 and between the second end cover 21 and the adjusting rod 7, respectively, to ensure the sealing of the valve body 1.

[0039] Working principle: The pressure of the fuel before entering the fuel gun is constant. After entering the fuel gun, it enters the fuel flow control valve. At this time, the electric actuator 12 drives the adjustment rod 7 to rotate to adjust the flow area of ​​the flow channel to achieve oil pressure regulation; the electric actuator 12 is composed of a servo motor and a transmission mechanism. The servo motor is a motor that can achieve precise control, making the use of electric actuators for adjustment more stable and accurate than the elastic part adjustment in the existing technology.

[0040] In some embodiments, an angle is formed between the extension direction of the incision 8 and the second direction, the opening of the angle faces away from the second end side, and the angle is an acute angle.

[0041] Specifically, such as Figure 1 As shown, in the initial state, the regulating rod 7 completely blocks the fuel inlet 3. At this time, the flow area of ​​the oil flow channel is the smallest. When the regulating rod 7 is rotated, the cutout 8 rotates toward the fuel inlet 3, gradually increasing the flow area of ​​the flow channel. At the same time, Figure 4 As shown, in this embodiment, the angle between the extension direction of the cutout 8 and the second direction is an acute angle, that is, the cutout 8 is formed by obliquely cutting the end of the adjusting rod 7, so that each time the adjusting rod 7 is rotated, the change in the fluid area of ​​the fluid channel is smaller, thereby achieving more precise adjustment.

[0042] In some embodiments, a connecting bracket 9 is provided between the electric actuator 12 and the valve body 1, and the interior of the connecting bracket 9 has a first space; the second end is provided in the first space; the driving end of the electric actuator 12 extends into the first space and is connected to the second end; a display device is provided in the first space, and the display device is used to display the rotation angle of the adjusting rod 7.

[0043] Specifically, such as Figure 1-Figure 3As shown, a connecting bracket 9 is provided between the electric actuator 12 and the valve body 1, and a first space is provided inside the connecting bracket 9; the connecting bracket 9 is used to connect the electric actuator 12 and the valve body 1, leaving a placement space for the driving end of the electric actuator 12; at the same time, a display device is provided in the first space to display the rotation angle of the adjusting rod 7, and then judge the fluid area of ​​the current oil inlet fluid channel according to the rotation angle.

[0044] In some embodiments, a coupling 13 is provided between the driving end and the second end of the electric actuator 12 .

[0045] Specifically, the driving end and the second end of the electric actuator 12 are connected via a coupling 13 . The coupling 13 is used to improve the reliability, flexibility and control accuracy of the device and reduce maintenance costs and energy consumption.

[0046] In some embodiments, the display device includes: a dial 10 and a pointer 11, the dial 10 is arranged on the side wall of the first space near the electric actuator 12, and a scale is provided on the dial 10; the pointer 11 has an L-shaped structure, one end of the pointer 11 is fixed on the coupling 13, and the other end of the pointer 11 points to the dial 10.

[0047] Specifically, the scale on the dial 10 is 0°~90°, and in the initial state of the adjustment rod 7, the pointer 11 points to 0°; when the adjustment rod 7 rotates, the pointer 11 is driven to rotate, and each rotation of one scale corresponds to the fluid area of ​​the oil inlet fluid channel; when the pointer 11 is at 0°, the fuel inlet 3 is completely blocked, and the fluid area of ​​the oil inlet fluid channel is minimized; when the pointer 11 is at 90°, the fuel inlet 3 is fully open, and the fluid area of ​​the oil inlet fluid channel is maximized.

[0048] In certain embodiments, as Figure 2 、 Figure 5 and Figure 6 As shown, the coupling 13 and the second end are connected by a fastening assembly, which includes: a flat key 18 and a fastening screw; the flat key 18 is arranged on the inner wall of the coupling 13, and a flat key hole corresponding to the flat key 18 is provided on the adjusting rod 7, and the flat key 18 is connected to the flat key hole; and the adjusting rod 7 is fixedly connected to the coupling 13 by a fastening screw; the fastening screw is used to reduce the amount of rotational shaking between the electric actuator 12 and the adjusting rod 7, and the flat key 18 is used to increase the torsional strength of the adjusting rod 7, so that the connection between the adjusting rod 7 and the electric actuator 12 is more stable.

[0049] In some embodiments, a fine-tuning assembly is provided at one end of the valve body 1 away from the electric actuator 12 , and the fine-tuning assembly is used to drive the valve core 2 to move in the second direction within the valve body 1 .

[0050] Specifically, such as Figure 1As shown, a fine-tuning assembly is provided at one end of the valve body 1 away from the electric actuator 12, and the fine-tuning assembly is used to drive the valve core 2 to move in the second direction within the valve body 1, so that the fuel flow control valve provided in this embodiment can be adapted to more burners;

[0051] After the fine-tuning assembly drives the valve core 2 to move to the specified position in the second direction within the valve body 1, the position between the fuel inlet 3 and the adjusting rod 7 is changed. As a result, when the adjusting rod 7 is rotated, the position of the cutout 8 and the fuel inlet 3 also changes accordingly. With each rotation of one scale, the flow area of ​​the corresponding oil inlet flow channel changes accordingly.

[0052] In some embodiments, the fine-tuning assembly includes: a first end cover 14, a fine-tuning screw 15, and an end cap 16; the first end cover 14 is fixed to the end of the valve body 1 away from the electric actuator 12, and a fine-tuning screw 15 is provided through the middle of the first end cover 14 along the second direction. The fine-tuning screw 15 is rotatably connected to the first end cover 14, one end of the fine-tuning screw 15 is threadedly connected to the valve core 2, and the other end of the fine-tuning screw 15 extends out of the valve body 1 and is fixedly connected to the end cap 16.

[0053] Specifically, when the position of the valve core 2 needs to be adjusted, the fine-tuning screw 15 is rotated, and the fine-tuning screw 15 is threadedly connected to the valve core 2, so that the valve core 2 moves in the valve body 1 along the second direction, thereby changing the position between the valve core 2 and the adjusting rod 7;

[0054] Specifically, the end cap 16 is provided on the fine-tuning screw 15 to protect the fine-tuning screw 15 from being damaged; at the same time, the end cap 16 can be rotated to adjust the distance and tightening force between the fine-tuning screw 15 and the connected object, thereby improving the accuracy of fine-tuning;

[0055] Specifically, O-rings 20 are respectively provided between the first end cover 14 and the valve body 1 and between the first end cover 14 and the fine-tuning screw 15 to ensure the sealing of the valve body 1 .

[0056] In some embodiments, a locking bolt 17 is threadedly connected to the valve body 1, and the locking bolt 17 extends along a third direction. One end of the locking bolt 17 is located outside the valve body 1, and the other end of the locking bolt 17 abuts against the valve core 2; the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0057] Specifically, such as Figure 1 As shown, a locking bolt 17 is threadedly connected to the valve body 1. When the valve core 2 does not need to be moved, the locking bolt 17 abuts against the valve core 2 to lock the position of the valve core 2. When the valve core 2 needs to be moved, the locking bolt 17 is rotated to separate the locking bolt 17 from the valve core 2, and then the valve core 2 is moved. After the valve core 2 moves to a specified position, the locking bolt 17 is rotated to abut against the valve core 2.

[0058] Specifically, an O-ring 20 is provided between the locking bolt 17 and the valve body 1 to ensure the sealing performance of the valve body 1 .

[0059] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A fuel flow regulating valve for a burner, characterized in that: include: A valve body (1), wherein a cylindrical valve core (2) is provided inside the valve body (1), and a fuel inlet (3) and a fuel outlet (4) are respectively provided on both sides of the valve core (2) along a first direction; An adjusting rod (7), the adjusting rod (7) having a first end and a second end along a second direction, the first end being rotatably disposed within the valve core (2), a cutout (8) being provided on a side wall of the first end; a flow channel for oil inlet being formed between the cutout (8) and the fuel inlet (3); the second direction being perpendicular to the first direction; An electric actuator (12), the electric actuator (12) being arranged on one side of the valve body (1) along the second direction, the driving end of the electric actuator (12) being fixedly connected to the second end, and the electric actuator (12) being used to drive the adjusting rod (7) to rotate to adjust the flow area of ​​the flow channel.

2. The fuel flow regulating valve for a burner according to claim 1, characterized in that: An included angle is formed between the extension direction of the cutout (8) and the second direction, the opening of the included angle faces away from the second end side, and the included angle is an acute angle.

3. The fuel flow regulating valve for a burner according to claim 2, characterized in that: A connecting bracket (9) is provided between the electric actuator (12) and the valve body (1), and a first space is provided inside the connecting bracket (9); the second end is provided in the first space; the driving end of the electric actuator (12) extends into the first space and is connected to the second end; a display device is provided in the first space, and the display device is used to display the rotation angle of the adjusting rod (7).

4. The fuel flow regulating valve for a burner according to claim 3, characterized in that: A coupling (13) is provided between the driving end and the second end of the electric actuator (12).

5. The fuel flow regulating valve for a burner according to claim 4, characterized in that: The display device comprises: a dial (10) and a pointer (11); the dial (10) is arranged on a side wall of the first space close to the electric actuator (12); and a scale is provided on the dial (10); and the pointer (11) is in an L-shaped structure, with one end of the pointer (11) fixed to the coupling (13), and the other end of the pointer (11) pointing to the dial (10).

6. The fuel flow regulating valve for a burner according to claim 2, characterized in that: A fine-tuning component is provided at one end of the valve body (1) away from the electric actuator (12), and the fine-tuning component is used to drive the valve core (2) to move along the second direction within the valve body (1).

7. The fuel flow regulating valve for a burner according to claim 6, characterized in that: The fine-tuning assembly comprises: a first end cover (14), a fine-tuning screw (15), and an end cap (16); the first end cover (14) is fixed to one end of the valve body (1) away from the electric actuator (12); the fine-tuning screw (15) is provided through the middle of the first end cover (14) along the second direction; the fine-tuning screw (15) is rotatably connected to the first end cover (14); one end of the fine-tuning screw (15) is threadedly connected to the valve core (2); the other end of the fine-tuning screw (15) extends out of the valve body (1) and is fixedly connected to the end cap (16).

8. The fuel flow regulating valve for a burner according to claim 7, characterized in that: A locking bolt (17) is threadedly connected to the valve body (1), and the locking bolt (17) extends along a third direction. One end of the locking bolt (17) is located outside the valve body (1), and the other end of the locking bolt (17) abuts against the valve core (2); the third direction is perpendicular to the first direction and perpendicular to the second direction.

9. The fuel flow regulating valve for a burner according to claim 4, characterized in that: The coupling (13) and the second end are connected via a fastening assembly, wherein the fastening assembly comprises: a flat key (18) and a fastening screw; the flat key (18) is arranged on the inner wall of the coupling (13); a flat key hole is provided on the adjusting rod (7) corresponding to the flat key (18); the flat key (18) is connected to the flat key hole; and the adjusting rod (7) and the coupling (13) are fixedly connected via the fastening screw.

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