Linear valve module integrating a 90° on / off valve position indicator angle limit switch

Abstract

This invention provides a linear valve module integrating a 90° on / off valve position indicator angle limit switch. The module includes a push rod for the linear valve and the 90° on / off valve position indicator angle limit switch. The drive end of the 90° on / off valve position indicator angle limit switch is equipped with an angle travel feedback shaft, and also includes a meshing large gear and a small gear. The transmission ratio between the large gear and the small gear is greater than 1. The large gear is driven to rotate via the push rod. The small gear is fixedly connected to the angle travel feedback shaft. By employing a transmission structure with a large gear and a small gear, and a transmission ratio greater than 1, the short-stroke linear displacement of the linear valve can be amplified into a 90° rotation of the angle travel feedback shaft, ensuring complete switching of the valve position indication and improving the accuracy of valve status feedback.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a linear valve module that integrates a 90° on / off valve position indicator angle limit switch. Background Technology

[0002] In industrial valve control systems, angle stroke switches are an important valve control accessory, primarily used to monitor and provide feedback on the open / closed status of valves. These switches are typically designed with a 90° rotational action to match the opening / closing action of angle stroke valves (such as ball valves and butterfly valves), enabling complete switching of valve position indication through a 90° rotation of the shaft.

[0003] However, for linear valves (such as gate valves and globe valves), the valve stem moves in a linear motion, not a rotary motion. Therefore, if an angle-stroke switch with a 90° valve position indicator is required, an additional mechanical conversion mechanism (such as a lever, rack and pinion, or cam mechanism) must be used to convert the linear motion into rotary motion. However, the existing technology has the following problems:

[0004] 1. Some linear valves have a short stroke, resulting in a rotation angle of less than 90° after conversion, which cannot meet the full switching requirements of angle switches and affects the accuracy of valve position indication.

[0005] 2. The existing mechanical conversion mechanism has a complex structure, and long-term operation is prone to wear, jamming or loosening, which can lead to false alarms or failures of the switching signal, affecting the stability and safety of valve control.

[0006] Therefore, there is an urgent need to design a modular conversion device suitable for linear valve actuators, which can reliably convert short-stroke linear displacement into 90° rotational motion, ensure accurate switching of valve position indication of angle limit switches, and improve installation stability and adaptability to meet the actual needs of industrial valve control systems. Utility Model Content

[0007] To address the technical problems in the background art, this utility model discloses a linear valve module integrating a 90° switch valve position indicator angle limit switch.

[0008] This utility model provides a linear valve module integrating a 90° switch valve position indicator angle limit switch, including a push rod of a linear valve and a 90° switch valve position indicator angle limit switch; the drive end of the 90° switch valve position indicator angle limit switch is provided with an angular stroke feedback shaft, and also includes a meshing large gear and a small gear;

[0009] The transmission ratio between the large gear and the small gear is greater than 1;

[0010] The large gear is driven to rotate by a push rod;

[0011] The pinion is fixedly connected to the angular travel feedback shaft.

[0012] Furthermore, it also includes a rotating shaft, one end of which is fixedly connected to a large gear, and the other end is vertically fixedly connected to a linear feedback plate; a push rod is movably connected to the linear feedback plate; the linear feedback plate is driven to rotate by axial movement of the push rod.

[0013] Furthermore, the push rod is provided with a linear feedback pin; the linear feedback plate is provided with an elongated groove that forms an angle with the push rod in its length direction and engages with the linear feedback pin.

[0014] Furthermore, it also includes a housing; a large gear and a small gear are installed inside the housing; the housing is composed of an upper housing and a lower housing with opposite openings.

[0015] Furthermore, a first upper limit post is provided inside the upper housing, and a first lower limit post is provided inside the lower housing; both ends of the large gear are axially limited between the first upper limit post and the first lower limit post; one end of the rotating shaft is inserted into the first upper limit post and the first lower limit post.

[0016] The upper housing is provided with a second upper limit post, and the lower housing is provided with a second lower limit post; the two ends of the pinion are axially limited between the second upper limit post and the second lower limit post.

[0017] One end of the angular stroke feedback shaft is inserted into the second upper limit post and the second lower limit post.

[0018] Furthermore, shims are provided at both ends of the large gear and the small gear to reduce friction.

[0019] Furthermore, a first fixing pin and a second fixing pin are provided inside the outer casing;

[0020] The first fixed pin is inserted radially into the shaft and the large gear;

[0021] The second fixed pin is radially inserted into the angular travel feedback shaft and the pinion.

[0022] Furthermore, when the push rod is perpendicular to the linear feedback plate, the position of the linear feedback pin within the slide groove is adjustable.

[0023] The beneficial effects of this utility model are:

[0024] 1. The transmission structure using large and small gears, with a transmission ratio greater than 1, can amplify the short-stroke linear displacement of the linear valve into a 90° rotation of the angular stroke feedback shaft, ensuring complete switching of the valve position indication and improving the accuracy of valve status feedback.

[0025] 2. The gear meshing transmission structure is stable and not prone to wear, jamming or loosening. It can maintain high transmission accuracy even after long-term operation, avoid false alarms or failures of switching signals, and improve the stability and safety of valve control.

[0026] 3. The modular design allows the gear transmission mechanism to be directly integrated between linear valves and angle switches, reducing the complex installation steps of additional conversion mechanisms and improving adaptability and versatility.

[0027] 4. By adjusting the gear transmission ratio, it can be adapted to linear valves with different strokes to meet diverse industrial application needs, and has strong flexibility and expandability. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 yes Figure 1 Sectional view of AA;

[0031] Figure 3 yes Figure 1 The sectional view of AA, and relative to Figure 2 The push rod is in the downward position;

[0032] Figure 4 yes Figure 1 Enlarged view of point B in the middle;

[0033] In the diagram: 1. Push rod; 2. 90° switch valve position indicator angle limit switch; 3. Angle travel feedback shaft; 4. Large gear; 5. Small gear; 6. Rotating shaft; 7. Linear travel feedback plate; 8. Linear travel feedback pin; 9. Slide groove; 10. Housing; 11. Upper housing; 12. Lower housing; 13. First upper limit post; 14. First lower limit post; 15. Second upper limit post; 16. Second lower limit post; 17. Gasket; 18. First fixing pin; 19. Second fixing pin. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0035] like Figure 1As shown, this utility model discloses a linear valve module integrating a 90° valve position indicator angle limit switch, including a linear valve push rod 1 and a 90° valve position indicator angle limit switch 2. The drive end of the 90° valve position indicator angle limit switch 2 is provided with an angle travel feedback shaft 3.

[0036] by Figure 1 For reference, a small gear 5 is mounted on the lower end of the angular travel feedback shaft 3, and a large gear 4 meshes with the left side of the small gear 5. The transmission ratio between the large gear 4 and the small gear 5 is greater than 1; in this embodiment, the transmission ratio is 2.5. The large gear 4 is mounted on the upper end of the rotating shaft 6, which is parallel to the angular travel feedback shaft 3.

[0037] The specific mounting structure of the gear is as follows: Figure 4 As shown, the enclosure includes a box-type outer shell 10, which is assembled and fixed by bolts to an upper shell 11 and a lower shell 12 with opposite openings. A first upper limit post 13 extends downwards from the left side of the upper shell 11, and a second upper limit post 15 extends downwards from the right side. A first lower limit post 14 extends upwards from the left side of the lower shell 12, and a second lower limit post 16 extends upwards from the right side. The first upper limit post 13 and the first lower limit post 14 are coaxial and have the same diameter, with a gap between them; the second upper limit post 15 and the second lower limit post 16 are also coaxial and have the same diameter, with a gap between them. A large gear 4 is coaxially disposed between the first upper limit post 13 and the first lower limit post 14, and a PTFE gasket 17 is provided at their connection point. A small gear 5 is coaxially disposed between the second upper limit post 15 and the second lower limit post 16, and a PTFE gasket 17 is also provided at their connection point. The gasket 17 is used to reduce the friction when the large gear 4 and the small gear 5 rotate. The upper end of the rotating shaft 6 coaxially passes through the first lower limit post 14 and the large gear 4, and is inserted into the inner hole of the first upper limit post 13. The lower end of the large gear 4 is connected to an integrally formed neck, and a horizontally arranged first fixing pin 18 is inserted between the rotating shaft 6 and the lower neck of the large gear 4 to fix the rotating shaft 6 and the large gear 4. The lower end of the angular stroke feedback shaft 3 passes through the second upper limit post 15 and the small gear 5, and is inserted into the inner hole of the second lower limit post 16. The lower end of the small gear 5 is connected to an integrally formed neck, and a horizontally arranged second fixing pin 19 is inserted between the angular stroke feedback shaft 3 and the lower neck of the small gear 5 to fix the angular stroke feedback shaft 3 and the small gear 5.

[0038] A linear feedback plate 7 extending to the left is vertically connected to the lower end of the rotating shaft 6. The right end of the linear feedback plate 7 is connected to the lower end profile of the rotating shaft 6 and is locked in place by a nut that is threaded to the lower end of the rotating shaft 6.

[0039] like Figure 2As shown, the linear feedback plate 7 is arranged horizontally and has an elongated oval groove 9 that runs through both the upper and lower sides and extends along its length. The upper end of the push rod 1 is vertically fixed with a linear feedback pin 8 that is inserted into the elongated hole.

[0040] like Figure 3 As shown, when push rod 1 moves axially, it drives linear feedback pin 8 to move synchronously. Linear feedback pin 8 slides within slide groove 9, causing linear feedback plate 7 to rotate. This rotation is sequentially transmitted to large gear 4, small gear 5, and angular feedback shaft 3. Due to the transmission structure of large gear 4 and small gear 5, and a transmission ratio greater than 1, the short-stroke linear displacement of the linear valve can be amplified into a 90° rotation of the angular feedback shaft 3, ensuring complete switching of the valve position indication and improving the accuracy of valve status feedback. Furthermore, the gear meshing transmission structure is stable and not prone to wear, jamming, or loosening. It maintains high transmission accuracy even during long-term operation, preventing false alarms or failures in switching signals and improving the stability and safety of valve control. By adjusting the gear transmission ratio, linear valves with different strokes can be adapted to meet diverse industrial application needs, offering strong flexibility and expandability.

[0041] In this embodiment, the connection structure between the rotating shaft 6 and the angular stroke feedback shaft 3, compared with the traditional mechanical structure, allows the gear transmission mechanism to be directly integrated between the linear valve and the angular stroke switch, reducing the complex installation steps of the additional conversion mechanism and improving adaptability and versatility.

[0042] Furthermore, since the linear feedback pin 8 is inserted into the slide groove 9, the position of the linear feedback pin 8 in the slide groove 9 can be adjusted by changing the installation position of the linear valve in the initial state. This makes the present invention applicable to the installation of linear actuators with different strokes, thus making it more widely applicable.

[0043] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A linear valve module integrating a 90° switching valve position indicating angle limit switch, comprising a push rod (1) of a linear valve and a 90° switching valve position indicating angle limit switch (2); the drive end of the 90° switching valve position indicating angle limit switch (2) is provided with an angle travel feedback shaft (3), characterized in that: It also includes a meshing large gear (4) and a small gear (5); The transmission ratio between the large gear (4) and the small gear (5) is greater than 1; The large gear (4) is driven to rotate by the push rod (1); The pinion (5) is fixedly connected to the angular stroke feedback shaft (3).

2. The direct stroke valve module integrated with a 90° switch valve position indicating angle travel switch of claim 1, wherein: It also includes a rotating shaft (6), one end of which is fixedly connected to the large gear (4), and the other end is vertically fixedly connected to a linear feedback plate (7); The push rod (1) is movably connected to the linear feedback plate (7); The linear feedback plate (7) is driven to rotate by the axial movement of the push rod (1).

3. The linear valve module integrating a 90° on / off valve position indicator angle limit switch according to claim 2, characterized in that: The push rod (1) is provided with a linear feedback pin (8); The linear feedback plate (7) is provided with an elongated groove (9) that forms an angle with the push rod (1) in the length direction and engages with the linear feedback pin (8).

4. The linear valve module integrating a 90° on / off valve position indicator angle limit switch according to claim 3, characterized in that: It also includes the outer casing (10); The large gear (4) and the small gear (5) are installed inside the housing (10); The outer shell (10) is formed by splicing an upper shell (11) and a lower shell (12) with opposite openings.

5. The linear valve module integrating a 90° on / off valve position indicator angle limit switch according to claim 4, characterized in that: The upper housing (11) is provided with a first upper limit post (13), and the lower housing (12) is provided with a first lower limit post (14); The large gear (4) is axially positioned between the first upper limit post (13) and the first lower limit post (14) at both ends; One end of the rotating shaft (6) is inserted into the first upper limit post (13) and the first lower limit post (14); The upper housing (11) is provided with a second upper limit post (15), and the lower housing (12) is provided with a second lower limit post (16); The pinion (5) is axially positioned between the second upper limit post (15) and the second lower limit post (16); One end of the angular travel feedback shaft (3) is inserted into the second upper limit post (15) and the second lower limit post (16).

6. The linear valve module integrating a 90° on / off valve position indicator angle limit switch according to claim 5, characterized in that: Both ends of the large gear (4) and the small gear (5) are provided with shims (17) to reduce friction.

7. The linear valve module integrating a 90° on / off valve position indicator angle limit switch according to claim 5, characterized in that: The outer casing (10) is provided with a first fixing pin (18) and a second fixing pin (19); The first fixing pin (18) is radially inserted into the rotating shaft (6) and the large gear (4) along the rotating shaft (6); The second fixed pin (19) is radially inserted into the angular stroke feedback shaft (3) and the pinion (5) along the angular stroke feedback shaft (3).

8. The linear valve module integrating a 90° on / off valve position indicator angle limit switch according to claim 3, characterized in that: When the push rod (1) is perpendicular to the linear feedback plate (7), the position of the linear feedback pin (8) within the slide groove (9) is adjustable.

Images