A worm gear box with remote valve position display

Abstract

This invention provides a worm gear box with remote valve position display, including a handwheel connected to a main shaft. A valve position transmission power take-off gear is mounted on the main shaft, meshing with a remote valve position display gear transmission mechanism. This mechanism is connected to a remote valve position display mechanism. With this invention, operators can read the valve status in real time by observing the valve position pointer and scale on the valve position display instrument panel without needing to approach the valve installation location. By using a preset gear ratio, the rotational speed of the valve position display pointer driven by the pointer shaft is precisely matched to the actual opening and closing angle of the valve driven by the worm gear shaft. Operators can clearly determine whether the valve is fully open, fully closed, or in a preset intermediate position by observing the valve position display scale, preventing abnormal operating conditions caused by misjudgment of the valve position.

Description

Technical Field

[0001] This utility model relates to the field of worm gear boxes, and more specifically, to a worm gear box with remote valve position display. Background Technology

[0002] Worm gearboxes, as a classic mechanical transmission component, are widely used in industrial fields, especially playing a crucial role in various valve drive systems. Their basic structure consists of a worm gear, a worm shaft, and a housing. Their working principle involves the worm shaft driving the worm wheel to rotate, achieving speed reduction and torque transmission, thereby driving the opening and closing of the valve. With advantages such as compact structure, large transmission ratio, smooth operation, and low noise, worm gearboxes have become an indispensable device in the valve control field.

[0003] A worm gear box, as proposed in Chinese Utility Model Patent Application No. CN201720391093.4, includes a housing, a worm, and a worm wheel. The worm and the worm wheel are rotatably mounted on the housing and mesh with each other on their outer peripheries. The worm has an input shaft coaxially arranged extending outside the housing, and the worm wheel has an output shaft coaxially arranged extending outside the housing. The input shaft is separate from the worm and is rotatably mounted on the housing. A speed regulating device is provided between the input shaft and the worm.

[0004] In modern industrial automation, the demand for remote monitoring and precise control of valves is increasing. However, most existing worm gear box technologies can only achieve local valve operation and cannot remotely transmit and display the actual valve position information. This forces operators to determine the valve position on-site by observing the mechanical indicators, which is not only labor-intensive and time-consuming, but also difficult for operators to approach the valves in some hazardous or harsh working environments, causing significant inconvenience to production management and safety assurance. For example, in chemical production, some pipelines transport toxic or harmful media, and on-site observation of valve positions poses a significant safety risk. Without remote valve position display, if an abnormal opening or closing of the valve occurs, operators will find it difficult to detect and take timely measures, potentially leading to serious production accidents such as media leakage and environmental pollution.

[0005] Existing worm gearbox technology cannot achieve remote valve position display, leading to significant uncertainty for operators when judging valve status. This uncertainty can trigger a series of serious problems, such as media leakage and flow control failure. These issues not only disrupt normal production and reduce efficiency but can also damage equipment, increasing maintenance costs and downtime. Furthermore, media leakage can pollute the environment and threaten the safety of workers. In summary, existing worm gearbox technology has significant shortcomings in remote and precise valve position display, failing to meet the requirements of modern industrial automation and precise control. Therefore, this paper proposes an improved worm gearbox with remote valve position display. Utility Model Content

[0006] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: a worm gear box with remote valve position display, including a handwheel, the handwheel being connected to the main shaft of the handwheel, a valve position transmission power take-off gear being provided on the main shaft of the handwheel, the valve position transmission power take-off gear being meshed with a remote valve position display gear transmission mechanism, the remote valve position display gear transmission mechanism being connected to a remote valve position display mechanism, a driving bevel gear being provided at the bottom of the main shaft of the handwheel, the driving bevel gear being meshed with a driven bevel gear, the driven bevel gear being connected to a worm gear transmission mechanism, and the worm gear transmission mechanism being disposed inside the worm gear box housing.

[0007] As a preferred technical solution of this utility model, the remote valve position display gear transmission mechanism includes an intermediate idler gear, a secondary transmission gear, a tertiary transmission gear, a pointer drive gear, and a pointer shaft.

[0008] As a preferred technical solution of this utility model, the valve position transmission power take-off gear meshes with the intermediate idler gear, the intermediate idler gear meshes with the secondary transmission gear, the secondary transmission gear meshes with the tertiary transmission gear, the tertiary transmission gear meshes with the pointer power gear, and a pointer shaft is provided at the center of the pointer power gear.

[0009] As a preferred technical solution of this utility model, the remote valve position display mechanism includes a valve position display instrument panel, a valve position display pointer, and a valve position display scale.

[0010] As a preferred technical solution of this utility model, the pointer shaft is connected to the valve position display pointer, the valve position display pointer is set on the valve position display instrument panel, and the valve position display instrument panel is provided with valve position display scale.

[0011] As a preferred technical solution of this utility model, the worm gear transmission mechanism includes a worm shaft, a worm, a worm wheel, and a worm wheel shaft.

[0012] As a preferred embodiment of this invention, the driven bevel gear is connected to the worm shaft, the worm shaft is connected to the worm, the worm is engaged with the worm wheel, and the worm wheel is sleeved on the worm wheel shaft.

[0013] As a preferred embodiment of this invention, the main shaft of the wheel is fitted with a shaft sleeve, and a bearing is provided at the end of the main shaft of the wheel.

[0014] As a preferred technical solution of this utility model, a sleeve connecting flange is provided below the sleeve, and the sleeve connecting flange is connected to the worm gear box housing by connecting bolts.

[0015] As a preferred technical solution of this utility model, the handwheel is provided with an operating handle.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the cooperation of the handwheel and the operating handle, the operator does not need to directly act on the valve body, and only a small force is required to drive the main shaft of the wheel to rotate; combined with the high reduction ratio characteristics of the worm gear transmission mechanism, including the torque amplification achieved by the meshing of the worm and the worm wheel, the operating force required to open and close the valve can be greatly reduced, which is especially suitable for large-diameter, high-pressure valves, avoiding operator fatigue caused by high-intensity force, and improving operating comfort and efficiency.

[0017] This utility model of remote valve position display mechanism allows operators to read the valve status in real time by means of the valve position display pointer and scale on the valve position display instrument panel, without having to approach the valve installation location. Multi-stage gear transmission enables precise valve position display: In the remote valve position display gear transmission mechanism, the intermediate idler gear, the secondary transmission gear, the tertiary transmission gear, and the pointer power gear form a multi-stage transmission. By preset gear ratios, the rotational speed of the valve position display pointer driven by the pointer shaft can be precisely matched with the actual opening and closing angle of the valve driven by the worm gear shaft. Operators can clearly determine whether the valve is fully open, fully closed, or in the preset intermediate position through the valve position display scale, preventing abnormal operating conditions caused by misjudgment of valve position, such as media leakage or flow control failure. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the present invention; Figure 2 A schematic diagram of the remote valve position display gear transmission mechanism provided by this utility model; Figure 3 An enlarged structural schematic diagram of the remote valve position display gear transmission mechanism provided by this utility model; Figure 4 This is a schematic diagram of the remote valve position display mechanism provided by this utility model; Figure 5 An enlarged structural schematic diagram of the remote valve position display mechanism provided by this utility model; Figure 6 A schematic diagram of the bearing structure provided by this utility model; Figure 7 A schematic diagram of the worm gear transmission mechanism provided by this utility model; Figure 8 A schematic diagram of the bevel gear structure provided by this utility model.

[0019] The image shows: 1. Handwheel; 101. Operating handle; 2. Handwheel spindle; 201. Valve position transmission power take-off gear; 3. Remote valve position display gear transmission mechanism: 301. Intermediate idler gear; 302. Secondary transmission gear; 303. Tertiary transmission gear; 304. Pointer drive gear; 305. Pointer shaft; 4. Remote valve position display mechanism; 401. Valve position display instrument panel; 402. Valve position display pointer; 403. Valve position display scale; 5. Driving bevel gear; 6. Driven bevel gear; 7. Worm gear transmission mechanism; 701. Worm shaft; 702. Worm; 703. Worm gear; 704. Worm gear shaft; 8. Worm gear housing; 9. Shaft sleeve; 10. Bearing; 11. Sleeve connecting flange; 12. Connecting bolts. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0021] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] Example 1: A worm gearbox with remote valve position display includes a handwheel 1, an operating handle 101, and is connected to a main shaft 2. A valve position transmission power take-off gear 201 is mounted on the main shaft 2, meshing with a remote valve position display gear transmission mechanism 3. The remote valve position display gear transmission mechanism 3 is connected to a remote valve position display mechanism 4. A driving bevel gear 5 is located at the bottom of the main shaft 2, meshing with a driven bevel gear 6. The driven bevel gear 6 is connected to a worm gear transmission mechanism 7, which is located inside the worm gearbox housing 8. The remote valve position display gear transmission mechanism 3 includes an intermediate idler gear 301, a secondary transmission gear 302, a tertiary transmission gear 303, a pointer drive gear 304, and a pointer shaft 305. The valve position drive power take-off gear 201 meshes with the intermediate idler gear 301, the intermediate idler gear 301 meshes with the secondary drive gear 302, the secondary drive gear 302 meshes with the tertiary drive gear 303, the tertiary drive gear 303 meshes with the pointer power gear 304, and a pointer shaft 305 is provided at the center of the pointer power gear 304.

[0023] The remote valve position display mechanism 4 includes a valve position display instrument panel 401, a valve position display pointer 402, and a valve position display scale 403. The pointer shaft 305 is connected to the valve position display pointer 402, which is mounted on the valve position display instrument panel 401. The valve position display instrument panel 401 is provided with the valve position display scale 403.

[0024] The worm gear transmission mechanism 7 includes a worm shaft 701, a worm 702, a worm wheel 703, and a worm wheel shaft 704. The driven bevel gear 6 is connected to the worm shaft 701, the worm shaft 701 is connected to the worm 702, the worm 702 is fitted with the worm wheel 703, and the worm wheel 703 is sleeved on the worm wheel shaft 704.

[0025] The main shaft 2 of the wheel is fitted with a bushing sleeve 9, and a bearing 10 is provided at the end of the main shaft 2. A bushing sleeve connecting flange 11 is provided below the bushing sleeve 9, and the bushing sleeve connecting flange 11 is connected to the worm gear box housing 8 by connecting bolts 12.

[0026] Working principle of the worm gear box with remote valve position display: The operator inputs torque by turning the operating handle 101 on the handwheel 1, which drives the handwheel 1 to rotate synchronously; Since the handwheel 1 is rigidly connected to the wheel spindle 2, the wheel spindle 2 rotates together with the handwheel 1; At this time, the shaft sleeve 9 outside the wheel spindle 2 plays a radial limiting role, and the bearing 10 at the end reduces the frictional resistance when the wheel spindle 2 rotates, ensuring smooth transmission. Note: The shaft sleeve 9 is fixed to the worm gear box housing 8 through the sleeve connecting flange 11 and the connecting bolt 12, providing stable support for the wheel spindle 2.

[0027] The driving bevel gear 5 at the bottom of the main shaft 2 rotates with the main shaft, driving the driven bevel gear 6 to rotate through gear meshing, converting the vertical axial rotation of the main shaft 2 into the radial rotation of the driven bevel gear 6; the worm shaft 701 fixedly connected to the driven bevel gear 6 rotates synchronously, driving the integrated worm 702 to rotate; since the worm 702 and the worm wheel 703 are meshing, the rotational driving force of the worm 702 is transmitted to the worm wheel 703, and the torque is output through the worm wheel shaft 704 sleeved on the worm wheel 703. The worm wheel and worm gear transmission has the characteristics of large reduction ratio and torque amplification, which can meet the large torque requirements of valve opening and closing; throughout the transmission process, the worm wheel and worm gear transmission mechanism 7 is enclosed in the worm wheel housing 8 to prevent dust and impurities from entering and affecting the transmission accuracy.

[0028] Remote valve position display: When the main shaft 2 of the wheel rotates, the valve position transmission power take-off gear 201 fixed on it rotates synchronously, and the power is transmitted to the intermediate idler gear 301 of the remote valve position display gear transmission mechanism 3 through gear meshing; the intermediate idler gear 301 drives the meshing secondary transmission gear 302 to rotate, the secondary transmission gear 302 further drives the tertiary transmission gear 303, and finally the tertiary transmission gear 303 drives the pointer power gear 304 to rotate. The multi-stage gear transmission can make the speed of the pointer power gear 304 precisely match the actual opening and closing angle of the valve by adjusting the gear ratio; The pointer shaft 305, which is fixed at the center of the pointer power gear 304, rotates synchronously with the gear. Since the pointer shaft 305 is rigidly connected to the valve position display pointer 402 of the remote valve position display mechanism 4, the valve position display pointer 402 will rotate synchronously on the valve position display instrument panel 401. The operator can remotely and intuitively read the current opening and closing position of the valve, including fully open, half open, and fully closed, through the valve position display scale 403 pointed to by the valve position display pointer 402, so as to realize real-time monitoring of the valve position status. Working process of the worm gearbox with remote valve position display: Power input and main drive start-up stage: The operator holds the operating handle 101 and applies rotational force to the handwheel 1, causing the handwheel 1 to rotate around the central axis; because the handwheel 1 is rigidly connected to the wheel spindle 2, the wheel spindle 2 rotates synchronously with the handwheel 1; at this time, the shaft sleeve 9 on the outside of the wheel spindle 2 restricts the radial displacement of the spindle, and the bearing 10 at the end reduces the rotational friction of the spindle, ensuring transmission stability. The shaft sleeve 9 is fixed to the worm gearbox housing 8 through the sleeve connecting flange 11 and the connecting bolt 12, providing support for the entire main drive structure.

[0029] Remote valve position display stage: While the main shaft 2 of the wheel rotates, the valve position transmission power take-off gear 201 fixed on it rotates synchronously, and the power is transmitted to the intermediate idler gear 301 of the remote valve position display gear transmission mechanism 3 through gear meshing; The intermediate idler wheel 301 drives the meshing secondary transmission gear 302 to rotate, the secondary transmission gear 302 then drives the tertiary transmission gear 303, and finally the tertiary transmission gear 303 drives the pointer power gear 304 to rotate. By adjusting the gear ratio of each gear, the speed of the pointer power gear 304 is precisely matched with the valve opening and closing angle, ensuring accurate valve position display. The pointer shaft 305 at the center of the pointer drive gear 304 rotates synchronously with the gear. Because the pointer shaft 305 is rigidly connected to the valve position display pointer 402, the valve position display pointer 402 rotates on the valve position display instrument panel 401 with the pointer shaft 305. The operator can remotely determine the current valve status, such as fully open, half open, or fully closed, by observing the valve position display scale 403 pointed to by the valve position display pointer 402, thus realizing real-time monitoring of the valve position.

[0030] Worm gear transmission stage: When the main shaft 2 of the wheel rotates, the driving bevel gear 5 at its bottom rotates accordingly. Through gear meshing, it drives the driven bevel gear 6 to rotate, converting the vertical rotation of the main shaft 2 of the wheel into the horizontal rotation of the driven bevel gear 6, thus completing the transmission direction switch; The driven bevel gear 6 is fixedly connected to the worm shaft 701, which drives the worm shaft 701 to rotate synchronously, thereby driving the worm 702, which is integrated with the worm shaft 701, to rotate. The worm 702 meshes with the worm wheel 703, transmitting rotational power to the worm wheel 703. Due to the high reduction ratio of the worm wheel transmission, the speed of the worm wheel 703 is reduced while the torque is amplified. Ultimately, the worm wheel 703 drives the sleeved worm wheel shaft 704 to rotate, and outputs driving force to the external valve through the worm wheel shaft 704 to realize the valve opening and closing action. The worm wheel transmission mechanism 7 is located inside the worm wheel housing 8 to avoid external impurities affecting the transmission accuracy.

[0031] When the operator observes through the valve position display instrument panel 401 that the valve position display pointer 402 points to the target position, such as the valve fully open / fully closed scale, the operator stops rotating the operating handle 101. The handwheel 1 and the wheel spindle 2 stop rotating, and the subsequent worm gear drive and remote valve position display actions stop synchronously, keeping the valve in the target position.

[0032] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A worm gearbox with remote valve position display, comprising a handwheel (1), characterized in that, The handwheel (1) is connected to the main shaft (2). A valve position transmission power take-off gear (201) is provided on the main shaft (2). The valve position transmission power take-off gear (201) is meshed with the remote valve position display gear transmission mechanism (3). The remote valve position display gear transmission mechanism (3) is connected with the remote valve position display mechanism (4). A driving bevel gear (5) is provided at the bottom of the main shaft (2). The driving bevel gear (5) meshes with the driven bevel gear (6). The driven bevel gear (6) is connected with the worm gear transmission mechanism (7). The worm gear transmission mechanism (7) is located inside the worm gear housing (8).

2. A worm gear box with remote valve position display according to claim 1, characterized in that, The remote valve position display gear transmission mechanism (3) includes an intermediate idler gear (301), a secondary transmission gear (302), a tertiary transmission gear (303), a pointer power gear (304), and a pointer shaft (305).

3. A worm gear box with remote valve position display according to claim 2, characterized in that, The valve position drive power take-off gear (201) meshes with the intermediate idler gear (301), the intermediate idler gear (301) meshes with the secondary drive gear (302), the secondary drive gear (302) meshes with the tertiary drive gear (303), the tertiary drive gear (303) meshes with the pointer power gear (304), and a pointer shaft (305) is provided at the center of the pointer power gear (304).

4. A worm gear box with remote valve position display according to claim 3, characterized in that, The remote valve position display mechanism (4) includes a valve position display instrument panel (401), a valve position display pointer (402), and a valve position display scale (403).

5. A worm gear box with remote valve position display according to claim 4, characterized in that, The pointer shaft (305) is connected to the valve position display pointer (402), the valve position display pointer (402) is set on the valve position display instrument panel (401), and the valve position display instrument panel (401) is provided with valve position display scale (403).

6. A worm gear box with remote valve position display according to claim 5, characterized in that, The worm gear transmission mechanism (7) includes a worm shaft (701), a worm (702), a worm wheel (703), and a worm wheel shaft (704).

7. A worm gear box with remote valve position display according to claim 6, characterized in that, The driven bevel gear (6) is connected to the worm shaft (701), the worm shaft (701) is connected to the worm (702), the worm (702) is engaged with the worm wheel (703), and the worm wheel (703) is sleeved on the worm wheel shaft (704).

8. A worm gear box with remote valve position display according to claim 7, characterized in that, The main shaft (2) of the wheel is fitted with a shaft sleeve (9), and a bearing (10) is provided at the end of the main shaft (2).

9. A worm gear box with remote valve position display according to claim 8, characterized in that, The sleeve (9) is provided with a sleeve connecting flange (11) below it, and the sleeve connecting flange (11) is connected to the worm gear box housing (8) by connecting bolts (12).

10. A worm gear box with remote valve position display according to claim 9, characterized in that, The handwheel (1) is provided with an operating handle (101).

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