Flow regulating valve for high-frequency pulse fuel oil burner

Abstract

The utility model discloses a flow regulating valve for a high-frequency pulse fuel oil burner, which relates to the field of flow regulating valves for burners, and comprises a valve body, two valve cores are rotatably connected in the valve body, a valve rod penetrates through the center of each valve core, and a fixed table is fixedly connected to the top end of the valve body. The valve rod upwards penetrates through the fixing table and then is fixedly connected with a first gear, the first gear is meshed with a second gear, the first gear is round, the second gear is oval, when the second gear rotates by one circle, the first gear synchronously rotates by one circle, and a driving structure used for driving the second gear to rotate is arranged on the fixing table. According to the utility model, the rotating speed of the valve core when the valve core is closed is higher than the rotating speed of the valve core when the valve core is opened by utilizing the relatively non-uniform linear speed of the oval gear when the oval gear rotates, so that the flow regulation process is more uniform, the rotating directions of the two groups of valve cores are opposite, and a certain retarding effect is achieved on oil flowing through the valve body; and the stability of oil quantity adjustment is further improved.

Description

Technical Field

[0001] The utility model relates to the field of flow regulating valves for burners, in particular to a flow regulating valve for a high-frequency pulse fuel burner. Background Technique

[0002] A fuel burner is a combustion device mainly using oil fuel, mainly composed of an oil atomizer and an air register. A flow regulating valve is required in the fuel system of the fuel burner to regulate the fuel flow to achieve the purpose of fire control.

[0003] Generally, the flow regulating valve in the existing high-frequency pulse fuel burner requires a relatively wide flow regulation range, and also needs to achieve precise linear regulation as much as possible within the flow regulation range to maintain the stable combustion of the flame of the high-frequency pulse fuel burner.

[0004] In view of the above related technologies, in order to have a sufficient fuel supply when the high-frequency pulse fuel burner is working, the fuel flow regulating valve of the existing high-frequency pulse fuel burner generally uses a ball valve or a butterfly valve as a flow regulating tool. The valve stem of the ball valve or the butterfly valve is driven by a constant-speed gear structure at the top to realize the opening and closing of the valve core. The constant-speed rotating valve core is not directly proportional to the fuel flow rate flowing through the regulating valve. The flow regulation speed at the moment of closing is often higher than that at the moment of opening the valve core. The regulation of the flow by the valve core during rotation is not uniform. To sum up, the flow regulating valve of the existing high-frequency pulse fuel burner has the problem of uneven flow regulation during the opening and closing process. Content of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a flow regulating valve for a high-frequency pulse fuel burner to solve the technical problem of uneven flow regulation of the flow regulating valve of the existing high-frequency pulse fuel burner during the opening and closing process.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A flow regulating valve for a high-frequency pulse fuel burner, including a valve body. Two valve cores are rotatably connected in the valve body. A valve stem passes through the center of the valve core. A fixed platform is fixedly connected to the top of the valve body. The valve stem passes upward through the fixed platform and is fixedly connected to a first gear. The first gear meshes with a second gear. The first gear is circular, and the second gear is elliptical. When the second gear rotates one circle, the first gear rotates one circle synchronously. A driving structure for driving the second gear to rotate is arranged on the fixed platform.

[0007] By adopting the above technical solution, the relatively uneven linear velocity of the elliptical gear during rotation compared to the circular gear is utilized, such that the rotational speed of the valve core when closing is higher than when opening, making the flow regulation process more uniform. Moreover, the rotational directions of the two groups of valve cores are opposite, which has a certain blocking effect on the oil flowing through the valve body, further enhancing the stability of the oil volume regulation.

[0008] The present utility model is further configured such that a dual-axis motor is connected to the center of the top of the fixed platform. Output ends of the dual-axis motor are all connected to second sliding shafts. The second sliding shafts are slidably connected to coaxial first sliding shafts. The first sliding shaft and the second sliding shaft cannot rotate relative to each other. One end of the first sliding shaft away from the second sliding shaft is fixedly connected to a transmission shaft. The transmission shaft is rotatably connected to a fixed seat. The fixed seat is fixedly connected to a slider. The slider is slidably connected in a chute on the fixed platform. The second gear is rotatably connected to the slider. A helical gear is provided between the top end of the second gear and the transmission shaft. A spring in a compressed state is connected between the slider and the inner wall of the chute.

[0009] By adopting the above technical solution, the second gear above the slider always maintains a meshing state with the first gear during rotation.

[0010] The present utility model is further configured such that a fixing plate is fixedly connected to one end of the chute away from the slider. A sliding plate is fixedly connected to the top end of the slider in the direction towards the fixing plate. The top surface of the sliding plate is lower than the bottom surface of the fixing plate.

[0011] By adopting the above technical solution, the spring can be stably maintained inside the chute.

[0012] The present utility model is further configured such that the lengths of the first sliding shaft and the second sliding shaft are both greater than the sliding stroke of the slider.

[0013] By adopting the above technical solution, it is avoided that the slider cannot slide smoothly due to the contact between the ends of the first sliding shaft and the second sliding shaft during the sliding process of the slider.

[0014] The present utility model is further configured such that a protective cover is connected to the fixed platform.

[0015] By adopting the above technical solution, the protective cover can effectively prevent the gear structure on the fixed platform from being affected by the outside and unable to rotate accurately.

[0016] The present utility model is further configured such that when the valve core is in the closed state, the teeth at one end of the long axis of the second gear are meshed with the first gear.

[0017] By adopting the above technical solution, the rotational speed of the valve core when opening is higher than that when closing.

[0018] The present utility model is further configured such that the length of the fixed plate is greater than that of the sliding plate, and the length of the sliding plate is greater than the sliding stroke of the slider.

[0019] By adopting the above technical solution, it is avoided that a gap appears between the sliding plate and the fixed plate, resulting in the spring warping up.

[0020] To sum up, the present utility model mainly has the following beneficial effects:

[0021] In the present utility model, two groups of valve cores are arranged in the valve body, and the driving assembly is used to synchronously drive the two groups of valve cores to rotate in opposite directions. The driving assembly is engaged with the circular gear at the top of the valve rod through an elliptical gear. By using the relatively uneven linear velocity between the elliptical gear and the circular gear during rotation, the rotation speed of the valve core when closing is higher than that when opening, making the flow regulation process more uniform. Moreover, the two groups of valve cores rotate in opposite directions, which has a certain blocking effect on the oil flowing through the valve body, further improving the stability of oil volume regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the present utility model;

[0023] Figure 2 is a perspective view of the internal structure of the protective cover of the present utility model;

[0024] Figure 3 is of the present utility model Figure 2 an enlarged view of A in;

[0025] Figure 4 is a perspective view of the internal structure of the fixed table of the present utility model;

[0026] Figure 5 is of the present utility model Figure 4 an enlarged view of B in;

[0027] Figure 6 is an exploded view of the telescopic transmission structure of the present utility model.

[0028] In the figure: 1, valve body; 2, valve core; 3, valve rod; 4, fixed table; 5, protective cover; 6, double-shaft motor; 7, chute; 8, slider; 9, first gear; 10, second gear; 11, spring; 12, fixed plate; 13, sliding plate; 14, fixed seat; 15, transmission shaft; 16, first sliding shaft; 17, second sliding shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0030] The embodiments of the present invention will be described below according to its overall structure.

[0031] Embodiment 1

[0032] A flow regulating valve for a high-frequency pulse fuel burner, as Figures 1-6 shown, includes a valve body 1. Two valve cores 2 are rotatably connected inside the valve body 1. A valve rod 3 passes through the center of the valve core 2. Specifically, when the two valve cores 2 inside the valve body 1 are opened in a shape like an eight from the closed state, the fuel at the high-pressure end in the fuel pipeline passes through one of the valve cores 2 and is blocked by the other valve core 2 with the opposite inclination angle, which can effectively reduce the impact force of the fuel in the fuel pipeline and avoid the sudden increase in fuel pressure when the flow regulating valve is opened instantaneously. A fixed platform 4 is fixedly connected to the top of the valve body 1. The valve rod 3 passes upward through the fixed platform 4 and is fixedly connected to a first gear 9. The first gear 9 meshes with a second gear 10. The first gear 9 is circular, and the second gear 10 is elliptical. When the second gear 10 rotates one circle, the first gear 9 rotates one circle synchronously. A driving structure for driving the second gear 10 to rotate is provided on the fixed platform 4.

[0033] Please refer to Figures 2-5 , the center of the top of the fixed platform 4 is connected to a double-shaft motor 6. The output ends of the double-shaft motor 6 are both connected to a second sliding shaft 17. The second sliding shaft 17 is slidably connected to a coaxial first sliding shaft 16. The first sliding shaft 16 and the second sliding shaft 17 cannot rotate relative to each other. One end of the first sliding shaft 16 away from the second sliding shaft 17 is fixedly connected to a transmission shaft 15. The transmission shaft 15 is rotatably connected to a fixed seat 14. The fixed seat 14 is fixedly connected to a slider 8. The slider 8 is slidably connected to a chute 7 on the fixed platform 4. The second gear 10 is rotatably connected to the slider 8. A helical gear is provided between the top of the second gear 10 and the transmission shaft 15. A spring 11 in a compressed state is connected between the slider 8 and the inner wall of the chute 7. The elastic force is applied to the slider 8 by the spring 11 in the chute 7 in a compressed state, so that the second gear 10 above the slider 8 always remains in a meshing state with the first gear 9 during the rotation process.

[0034] Please refer to Figures 2-5The top of the slider 8 is fixedly connected to the sliding plate 13 in the direction of the fixing plate 12, and the top surface of the sliding plate 13 is fixedly connected to the sliding plate 13. The top surface of the sliding plate 13 is lower than the bottom surface of the fixing plate 12. The protective structure composed of the fixing plate 12 and the sliding plate 13 can effectively prevent the spring 11 from being deformed and tilted due to the elastic force, so that the spring 11 can be stably maintained inside the sliding groove 7. The lengths of the first sliding shaft 16 and the second sliding shaft 17 are both greater than the sliding stroke of the slider 8 to avoid the slider 8 from being unable to slide smoothly due to the end contact of the first sliding shaft 16 and the second sliding shaft 17 during the sliding process. When the valve core 2 is in the closed state, the teeth at one end of the long axis of the second gear 10 are meshed with the first gear 9, so that the valve core 2 rotates faster when it is opened than when it is closed. The length of the fixing plate 12 is greater than the sliding plate 13, and the length of the sliding plate 13 is greater than the sliding stroke of the slider 8, so as to avoid the gap between the sliding plate 13 and the fixing plate 12 to cause the spring 11 to tilt.

[0035] Embodiment 2

[0036] A flow control valve for a high-frequency pulse fuel burner, such as Figures 1-6 As shown, based on the first embodiment, the difference from the first embodiment is that a protective cover 5 is connected to the fixing platform 4, and the protective cover 5 can effectively prevent the gear structure on the fixing platform 4 from being affected by the outside world and unable to rotate accurately.

[0037] The working principle of the utility model is as follows: when the flow rate is adjusted, the dual-axis motor 6 works, and the output ends at both ends rotate synchronously. The second sliding shaft 17 is driven by the first sliding shaft 16 and the transmission shaft 15 to drive the second gear 10 to rotate. Since the second gear 10 is elliptical, when the teeth at the short axis end of the second gear 10 are meshed with the first gear 9, the slider 8 is away from the dual-axis motor 6, and when the teeth at the long axis end of the second gear 10 are meshed with the first gear 9, the slider 8 is close to the dual-axis motor 6. When the slider 8 slides toward the dual-axis motor 6, the spring 11 is compressed, and the spring 11 is compressed and the elastic force generated forces the second gear 10 to maintain a meshing state with the first gear 9. When the teeth at the long axis end of the second gear 10 mesh with the first gear 9, the valve core 2 is in a closed state. At this time, the rotation of the second gear 10 tends to cause the first gear 9 to gradually slow down at a higher speed. The closer the valve core 2 is to a fully open state, the slower the first gear 9 rotates, so as to balance the sudden change in fuel flow rate caused by the rotation of the valve core 2 as much as possible. The two groups of valve cores 2 in the valve body 1 rotate in opposite directions, which can effectively avoid the sudden change in fuel flow rate caused by the sudden opening of the valve core, and further improve the smoothness of fuel regulation.

[0038] Although embodiments of the present utility model have been shown and described, the specific embodiments are only interpretations of the present utility model and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not make creative contributions to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A flow regulating valve for a high-frequency pulse fuel burner, comprising a valve body (1), characterized in that: There are two valve cores (2) rotatably connected inside the valve body (1). A valve stem (3) passes through the center of the valve core (2). A fixed platform (4) is fixedly connected to the top end of the valve body (1). The valve stem (3) passes upward through the fixed platform (4) and is fixedly connected to a first gear (9). The first gear (9) meshes with a second gear (10). The first gear (9) is circular, and the second gear (10) is elliptical. When the second gear (10) rotates one circle, the first gear (9) rotates one circle synchronously. A driving structure for driving the second gear (10) to rotate is provided on the fixed platform (4).

2. The flow regulating valve for a high-frequency pulse fuel burner according to claim 1, wherein: A double-shaft motor (6) is connected to the center of the top of the fixed platform (4). Output ends of the double-shaft motor (6) are both connected to a second sliding shaft (17). The second sliding shaft (17) is slidably connected to a coaxial first sliding shaft (16). The first sliding shaft (16) and the second sliding shaft (17) cannot rotate relative to each other. One end of the first sliding shaft (16) away from the second sliding shaft (17) is fixedly connected to a transmission shaft (15). The transmission shaft (15) is rotatably connected to a fixed seat (14). The fixed seat (14) is fixedly connected to a slider (8). The slider (8) is slidably connected inside a chute (7) on the fixed platform (4). The second gear (10) is rotatably connected to the slider (8). A helical gear is provided between the top end of the second gear (10) and the transmission shaft (15). A spring (11) in a compressed state is connected between the slider (8) and the inner wall of the chute (7).

3. The flow regulating valve for a high-frequency pulse fuel burner according to claim 2, characterized in that: A fixed plate (12) is fixedly connected to one end of the chute (7) away from the slider (8). A sliding plate (13) is fixedly connected to the top end of the slider (8) in the direction towards the fixed plate (12). The top surface of the sliding plate (13) is lower than the bottom surface of the fixed plate (12).

4. The flow regulating valve for a high-frequency pulse fuel burner according to claim 3, wherein: The lengths of the first sliding shaft (16) and the second sliding shaft (17) are both greater than the sliding stroke of the slider (8).

5. The flow regulating valve for a high-frequency pulse fuel burner according to claim 1, characterized in that: A protective cover (5) is connected to the fixed platform (4).

6. The flow regulating valve for high-frequency pulse fuel burner according to claim 1, characterized in that: When the valve core (2) is in the closed state, the teeth at one end of the long axis of the second gear (10) mesh with the first gear (9).

7. The flow regulating valve for a high-frequency pulse fuel burner according to claim 4, characterized in that: The length of the fixed plate (12) is greater than that of the sliding plate (13), and the length of the sliding plate (13) is greater than the sliding stroke of the slider (8).

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