High-precision opening control ball valve

Abstract

The utility model provides a high-precision opening degree control ball valve, which belongs to the technical field of ball valves and comprises a valve body, a valve rod, a ball body, a driver, a first gear, a second gear and a reduction gear set, the first gear is connected with the driver, the second gear is connected with the valve rod, and the diameter of the second gear is larger than that of the first gear. The reduction gear set comprises at least four different gear shafts, each gear shaft comprises a large gear part and a small gear part, and the gear shafts are sequentially meshed between the first gear and the second gear to form reduction transmission; according to the multi-stage reduction gear set, the opening degree of the ball valve can be accurately controlled, meanwhile, the torque can be amplified, the rotating resistance of the ball body can be overcome, the opening and closing processes of the valve are more stable, abrasion of a sealing face caused by too high opening and closing speed is reduced, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a high-precision opening control ball valve. Background Art

[0002] Ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other industries, and they play an important role in the national economy. The opening and closing parts (balls) of ball valves are driven by the valve stem and rotate around the axis of the ball valve. They can also be used for fluid regulation and control. Multi-way ball valves can not only flexibly control the confluence, diversion, and switching of the flow direction of the medium on the pipeline, but also close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. Ball valves are divided into pneumatic ball valves, electric ball valves, and manual ball valves according to the driving method.

[0003] At present, most electric ball valves use motors to directly drive the valve stem, so it is difficult to meet the high requirements for opening control accuracy, and there are also deficiencies in torque transmission and operating stability. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a high-precision opening control ball valve.

[0005] The technical solution adopted by the utility model is as follows: In the first aspect, the present application provides a high-precision opening control ball valve, including a valve body, a valve stem, a ball and a driver, wherein the ball is rotatably arranged in the valve body, one end of the valve stem is connected to the ball, and the other end is connected to the driver, and further includes: a first gear, which is connected to the driver; a second gear, which is connected to the valve stem, and the diameter of the second gear is larger than the diameter of the first gear; and a reduction gear set, wherein the reduction gear set includes at least four different gear shafts, wherein the gear shaft includes a large gear portion and a small gear portion, and each of the gear shafts is meshed in sequence between the first gear and the second gear to form a reduction transmission.

[0006] In some embodiments, there are six gear shafts, namely the first gear shaft, the second gear shaft, the third gear shaft, the fourth gear shaft, the fifth gear shaft and the sixth gear shaft; the large gear portion of the first gear shaft is meshed with the first gear; the small gear portion of the first gear shaft is meshed with the large gear portion of the second gear shaft; the small gear portion of the second gear shaft is meshed with the large gear portion of the third gear shaft; the small gear portion of the third gear shaft is meshed with the large gear portion of the fourth gear shaft; the small gear portion of the fourth gear shaft is meshed with the large gear portion of the fifth gear shaft; the small gear portion of the fifth gear shaft is meshed with the large gear portion of the sixth gear shaft; the small gear portion of the sixth gear shaft is meshed with the second gear.

[0007] In some embodiments, the first gear, each gear shaft and the second gear are arranged in a spiral shape.

[0008] In some embodiments, a medium chamber and a transmission chamber are provided on the valve body, a channel is provided between the medium chamber and the transmission chamber, the ball is rotatably provided in the medium chamber, one end of the valve stem passes through the channel and is connected to the second gear, and the other end is connected to the ball, and at least two sealing structures are provided between the valve stem and the channel.

[0009] In some embodiments, a valve cover is provided on the valve body, and the transmission cavity is formed between the valve body and the valve cover. A partition is provided in the transmission cavity, and the partition divides the transmission cavity into a first cavity close to the medium cavity and a second cavity away from the medium cavity. The first gear, each gear shaft and the second gear are all arranged in the first cavity, and the driver is arranged in the second cavity.

[0010] In some embodiments, a limiting column is disposed on the second gear toward the second cavity, and an arc-shaped limiting groove matched with the limiting column is disposed on the partition plate, and the arc-shaped limiting groove is disposed along the rotation path of the limiting column.

[0011] In some embodiments, the partition is provided with a travel switch at the first and second ends of the arc-shaped limit groove, and the travel switch includes a trigger contact, and the trigger contact extends into the arc-shaped limit groove.

[0012] In some embodiments, the valve body is provided with three medium ports, one of which is detachably provided with a connecting flange, and one of which is detachably provided with a closing flange.

[0013] The beneficial effects of the utility model are as follows: in the utility model, the multi-stage reduction gear set can be used to achieve precise control of the ball valve opening, and at the same time, the torque can be amplified, which helps to overcome the rotational resistance of the ball and makes the opening and closing process of the valve smoother, reducing the wear of the sealing surface caused by excessive opening and closing speeds, and extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0015] Figure 1 It is an exploded view of the ball valve in the utility model;

[0016] Figure 2 The schematic diagram of the ball valve structure in the utility model Figure 1 ;

[0017] Figure 3 The schematic diagram of the ball valve structure in the utility model Figure 2 ;

[0018] Figure 4 The cross section of the ball valve in the utility model Figure 1 ;

[0019] Figure 5 The cross section of the ball valve in the utility model Figure 2 ;

[0020] Figure 6 The schematic diagram of the structure of the ball valve in the utility model Figure 3 . DETAILED DESCRIPTION

[0021] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0022] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0024] In addition, the terms "installed", "set", "provided with", "connected", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0025] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0027] Embodiment 1:

[0028] like Figures 1 to 6 As shown, the present application provides a high-precision opening control ball valve, comprising a valve body 1, a valve stem 2, a ball 3 and a driver, wherein the ball 3 is rotatably arranged in the valve body 1, one end of the valve stem 2 is connected to the ball 3, and the other end is connected to the driver, and further comprises:

[0029] A first gear 4, wherein the first gear 4 is connected to a driver, and the driver is a rotary driver, such as a motor, a rotary cylinder, etc.;

[0030] a second gear 5, wherein the second gear 5 is connected to the valve stem 2, and a diameter of the second gear 5 is greater than a diameter of the first gear 4;

[0031] And the reduction gear set 6, the reduction gear set includes at least four different gear shafts 601. It should be understood that the different gear shafts 601 structurally include a large gear part 602 and a small gear part 603. The diameter of the large gear part 602 is larger than the diameter of the small gear part 603, but the diameters of the gear parts of different gear shafts 601 are different, so that a multi-stage reduction gear set can be formed.

[0032] Each of the gear shafts 601 is meshed in sequence between the first gear 4 and the second gear 5 to form a reduction transmission. Through the above-mentioned arrangement, a multi-stage reduction gear set is used between the driver and the valve stem 2, which can achieve precise control of the ball valve opening and torque amplification, help overcome the rotational resistance of the ball, and make the opening and closing process of the valve smoother, reduce the wear of the sealing surface caused by excessive opening and closing speed, and extend the service life of the valve.

[0033] In this embodiment, taking six gear shafts 601 as an example, the six gear shafts 601 are respectively configured as a first gear shaft 61, a second gear shaft 62, a third gear shaft 63, a fourth gear shaft 64, a fifth gear shaft 65 and a sixth gear shaft 66;

[0034] Among them, the large gear portion 602 of the first gear shaft 61 is meshed with the first gear 4 to achieve one deceleration; the small gear portion 603 of the first gear shaft 61 is meshed with the large gear portion 602 of the second gear shaft 62 to achieve two decelerations; the small gear portion 603 of the second gear shaft 62 is meshed with the large gear portion 602 of the third gear shaft 63 to achieve three decelerations; the small gear portion 603 of the third gear shaft 63 is meshed with the large gear portion 602 of the fourth gear shaft 64 to achieve four decelerations; the small gear portion 603 of the fourth gear shaft 64 is meshed with the large gear portion 602 of the fifth gear shaft 65 to achieve five decelerations; the small gear portion 603 of the fifth gear shaft 65 is meshed with the large gear portion 602 of the sixth gear shaft 66 to achieve six decelerations; the small gear portion 603 of the sixth gear shaft 66 is meshed with the second gear 5 to achieve seven decelerations.

[0035] Through the above arrangement, the seven-fold deceleration enables the driver to achieve more precise rotation control of the valve stem 2, thereby precisely controlling the opening of the valve, while also greatly improving the stability of the ball, which will not rotate due to medium impact.

[0036] Furthermore, the first gear 4, each gear shaft 601 and the second gear 5 are arranged in a spiral shape, that is, with the first gear 4 as the center, each gear shaft 601 and the second gear 5 are arranged to spiral outward, so that the arrangement of each gear shaft 601 is more compact, especially when there is a multi-stage reduction gear set, the overall volume of the ball valve can be greatly reduced.

[0037] like Figure 4 and Figure 5 As shown, a medium cavity 101 and a transmission cavity 102 are provided on the valve body 1, a channel 103 is provided between the medium cavity 101 and the transmission cavity 102, the ball 3 is rotatably provided in the medium cavity 101, one end of the valve stem 2 passes through the channel 103 and is connected to the second gear 5, and the other end is connected to the ball 3, at least two sealing structures 7 are provided between the valve stem 2 and the channel 103, preferably, the sealing structure adopts an O-ring to prevent the medium from flowing into the transmission cavity 102.

[0038] Furthermore, a valve cover 8 is provided on the valve body 1, and the valve cover 8 is connected to the valve body 1 by bolts. Routine inspection and necessary maintenance work can be carried out by removing the valve cover 8. The transmission cavity 102 is formed between the valve body 1 and the valve cover 8. A partition 9 is provided in the transmission cavity 102. The partition 9 separates the transmission cavity 102 into a first cavity 91 close to the medium cavity 101 and a second cavity 92 away from the medium cavity 101, so as to achieve functional isolation and better protect each gear and driver.

[0039] The first gear 4, each gear shaft 601 and the second gear 5 are all arranged in the first cavity 91, and the driver is arranged in the second cavity 92. Arranging all the gears and gear shafts in the same cavity can make the entire transmission mechanism more compact.

[0040] Secondly, if the driver generates a lot of heat, the partition 9 can also serve as a thermal isolation layer to prevent the heat from being transferred to the gear transmission part, which helps to maintain the stability of the lubricating oil and extend the life of the gear.

[0041] Furthermore, the second gear 5 is provided with a limiting column 51 toward the second cavity 92, and the partition plate 9 is provided with an arc-shaped limiting groove 93 adapted to the limiting column 51, and the arc-shaped limiting groove 93 is arranged along the rotation path of the limiting column 51. The interaction between the limiting column 51 and the arc-shaped limiting groove 93 limits the rotation range of the second gear 5, thereby limiting the rotation range of the ball 3, thereby preventing the drive failure from causing the ball 3 to rotate out of range.

[0042] Secondly, the partition 9 is provided with a travel switch 10 at the first and second ends of the arc-shaped limit groove 93. The travel switch 10 is a commonly used limit switch and will not be described in detail herein. Usually, the travel switch 10 includes a trigger contact 1001, and the trigger contact 1001 extends into the arc-shaped limit groove 93. When the limit column 51 rotates, it will touch the two trigger contacts 1001 respectively, thereby ensuring precise control of the opening and closing of the ball valve, making the ball valve more intelligent.

[0043] The valve body 1 is provided with three medium ports 104, one of which is detachably provided with a connecting flange 105, and one of which is detachably provided with a closing flange 106. In this way, the valve body 1 can have different medium flow channels, such as straight lines and right angles, by adjusting the connecting flange 105 and the closing flange 106, thereby improving the application range of the ball valve.

[0044] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0045] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0046] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A high-precision opening control ball valve, comprising a valve body (1), a valve stem (2), a ball (3) and a driver, wherein the ball (3) is rotatably arranged in the valve body (1), one end of the valve stem (2) is connected to the ball (3), and the other end is connected to the driver, characterized in that: Also includes: A first gear (4), the first gear (4) being connected to a driver; a second gear (5), the second gear (5) being connected to the valve stem (2), the diameter of the second gear (5) being greater than the diameter of the first gear (4); and a reduction gear set (6), wherein the reduction gear set comprises at least four different gear shafts (601), wherein the gear shafts (601) comprise a large gear portion (602) and a small gear portion (603), and each of the gear shafts (601) is meshed in sequence between the first gear (4) and the second gear (5) to form a reduction transmission.

2. A high-precision opening control ball valve according to claim 1, characterized in that: There are six gear shafts (601), namely a first gear shaft (61), a second gear shaft (62), a third gear shaft (63), a fourth gear shaft (64), a fifth gear shaft (65) and a sixth gear shaft (66); The large gear portion (602) of the first gear shaft (61) is meshed with the first gear (4); The small gear portion (603) of the first gear shaft (61) is meshed with the large gear portion (602) of the second gear shaft (62); The small gear portion (603) of the second gear shaft (62) is meshed with the large gear portion (602) of the third gear shaft (63); The small gear portion (603) of the third gear shaft (63) is meshed with the large gear portion (602) of the fourth gear shaft (64); The small gear portion (603) of the fourth gear shaft (64) is meshed with the large gear portion (602) of the fifth gear shaft (65); The small gear portion (603) of the fifth gear shaft (65) is meshed with the large gear portion (602) of the sixth gear shaft (66); The pinion portion (603) of the sixth gear shaft (66) meshes with the second gear (5).

3. A high-precision opening control ball valve according to claim 1 or 2, characterized in that: The first gear (4), each gear shaft (601) and the second gear (5) are arranged in a spiral shape.

4. A high-precision opening control ball valve according to claim 1, characterized in that: The valve body (1) is provided with a medium cavity (101) and a transmission cavity (102); a channel (103) is provided between the medium cavity (101) and the transmission cavity (102); the ball (3) is rotatably provided in the medium cavity (101); one end of the valve stem (2) passes through the channel (103) and is connected to the second gear (5); the other end is connected to the ball (3); and at least two sealing structures (7) are provided between the valve stem (2) and the channel (103).

5. A high-precision opening control ball valve according to claim 4, characterized in that: A valve cover (8) is arranged on the valve body (1), and a transmission chamber (102) is formed between the valve body (1) and the valve cover (8). A partition (9) is arranged in the transmission chamber (102), and the partition (9) divides the transmission chamber (102) into a first chamber (91) close to the medium chamber (101) and a second chamber (92) far from the medium chamber (101). The first gear (4), each gear shaft (601) and the second gear (5) are all arranged in the first chamber (91), and the driver is arranged in the second chamber (92).

6. A high-precision opening control ball valve according to claim 5, characterized in that: The second gear (5) is provided with a limiting column (51) facing the second cavity (92), and the partition plate (9) is provided with an arc-shaped limiting groove (93) adapted to the limiting column (51), and the arc-shaped limiting groove (93) is arranged along the rotation path of the limiting column (51).

7. A high-precision opening control ball valve according to claim 6, characterized in that: A travel switch (10) is provided on the partition plate (9) at the first and second ends of the arc-shaped limit groove (93); the travel switch (10) comprises a trigger contact (1001), and the trigger contact (1001) extends into the arc-shaped limit groove (93).

8. The high-precision opening control ball valve according to claim 1, characterized in that: The valve body (1) is provided with three medium ports (104), one of the medium ports (104) is detachably provided with a connecting flange (105), and one of the medium ports (104) is detachably provided with a closing flange (106).

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