Valve worm gear case

Abstract

The utility model belongs to the field of worm gear cases, and particularly discloses a valve worm gear case which comprises a worm gear case body, a worm and a hand wheel body, the worm is rotationally connected to the worm gear case body, the rotating shaft direction of the worm and the axis of the worm are located on the same straight line, and the hand wheel body is detachably connected to the worm to drive the worm to rotate. The hand wheel body is movably arranged in the axis direction of the worm. The worm gear case further comprises a locking assembly used for locking the hand wheel body and the worm. By adjusting the position of the hand wheel body on the worm, installation interference between the hand wheel body and the valve after the worm gear case is connected with the valve can be avoided, so that the worm gear case is better in applicability, and different valves can be effectively controlled.

Description

Technical Field

[0001] This application belongs to the field of worm gear boxes, and more specifically, relates to a valve worm gear box. Background Art

[0002] The worm gear box actuator is a common valve actuator. It drives the worm gear to rotate by rotating the worm to achieve the opening and closing of the valve. It is usually installed in the fluid medium pipeline system for truncating and opening the medium in the pipeline and adjusting the pipeline flow rate.

[0003] In the related art, the fixing method between the worm gear box and the handwheel is to drill through holes in the handwheel and the extended end of the worm, and then pass a pin through for fixing. In this installation method, the position between the handwheel and the worm is fixed. After this worm gear box with a fixed handwheel position is connected to the valve, due to the diverse structures of the valve, it is easy to have interference between the handwheel of the worm gear box and a certain part of the valve during the assembly of the worm gear box, resulting in the inability to rotate the handwheel, and thus the inability to control the valve. Utility Model Content

[0004] Aiming at the defects of the prior art, this application provides a valve worm gear box, aiming to solve the problem that after the existing worm gear box is connected to the valve, the handwheel is prone to interference with the valve, resulting in the inability to control the valve.

[0005] A valve worm gear box provided by this application specifically includes a worm gear box main body, a worm, and a handwheel body. The worm is rotatably connected to the worm gear box main body, and the rotation axis direction of the worm is on the same straight line as its axis. The handwheel body is detachably connected to the worm to drive the worm to rotate, and the handwheel body is movably arranged along the axis direction of the worm; this worm gear box further includes a locking component for locking the handwheel body and the worm.

[0006] Through the above technical solution conceived by this application, compared with the prior art, after the handwheel body is installed on the worm, it can drive the worm to rotate. When the worm gear box main body is connected to the valve, the worm rotates to control the opening and closing of the valve. By adjusting the position of the handwheel body on the worm, it can avoid interference between the handwheel body and the valve after the worm gear box is connected to the valve, and can achieve the beneficial effects of better applicability of this worm gear box and being able to effectively control the valve.

[0007] As a further preferred option, the handwheel body is provided with a shaft hole for the worm to pass through. A flat key is provided on the inner wall of the shaft hole. A first keyway is provided on the worm along the axis direction. The flat key is inserted into the first keyway, and a second keyway for installing the flat key is provided on the inner wall of the shaft hole.

[0008] By adopting the above technical solution, the flat key is arranged between the handwheel body and the worm, and a part of the flat key is located in the first keyway and a part is located in the second keyway, so that the handwheel body can move parallelly along the opening direction of the first keyway, adjust the distance between the handwheel body and the worm gear box, and avoid interference between the handwheel body and the valve after the worm gear box is connected to the valve.

[0009] As a further preference, the flat key is embedded and adapted to the first keyway and is slidably adapted to the second keyway.

[0010] By adopting the above technical solution, after the flat key is embedded in the first keyway, it is stably installed. The flat key is slidably adapted to the second keyway. When the handwheel body slides, the flat key guides the handwheel body, improving the sliding stability of the handwheel body.

[0011] As a further preference, positioning bosses are fixedly connected to both ends of the flat key, and the two positioning bosses are respectively in contact with the end faces of both ends of the handwheel body, and the flat key is slidably adapted to the first keyway.

[0012] By adopting the above technical solution, the positioning bosses position both ends of the flat key, making the flat key and the handwheel body relatively fixed. When the handwheel body moves, the first keyway guides the flat key and the handwheel body, improving the stability of its sliding.

[0013] As a further preference, the first keyway extends to one end of the worm away from the worm gear box body to form an opening.

[0014] By adopting the above technical solution, the flat key is inserted into the first keyway from the opening, so that the worm can be inserted into the shaft hole, facilitating the installation and disassembly of the handwheel body.

[0015] As a further preference, the handwheel body includes an annular handle, a mounting member and a plurality of connecting rods. The mounting member is fixedly connected to one side of the annular handle through the plurality of connecting rods, and the shaft hole is opened on the mounting member and is concentric with the center of the annular handle.

[0016] By adopting the above technical solution, when the annular handle is rotated, the mounting member is driven to rotate through the connecting rods, thereby driving the worm to rotate. The structure is simple and convenient to use. At the same time, the mounting member is located on one side of the annular handle, avoiding interference between the annular handle and the valve after the worm gear box is installed.

[0017] As a further preference, the locking assembly includes a first threaded locking member. A first threaded hole communicating with the shaft hole is opened on the mounting member. The first threaded locking member is threadedly connected and adapted to the first threaded hole, and the first threaded locking member can abut against the worm after passing through the first threaded hole.

[0018] By adopting the above technical solution, rotate the first threaded locking member to move it into the first threaded hole. The first threaded locking member passes through the first threaded hole and abuts against the worm, increasing the frictional force between the first threaded locking member and the worm, thereby fixing the relative position between the mounting member and the worm.

[0019] As a further preference, the locking assembly includes a second threaded locking member. A second threaded hole communicating with the shaft hole is formed in the mounting member. The second threaded locking member is in threaded connection and adaptation with the second threaded hole. The second threaded hole communicates with the second keyway. The second threaded locking member can push the flat key to abut against the worm.

[0020] By adopting the above technical solution, rotate the second threaded locking member to move it into the second threaded hole. The second threaded locking member pushes the flat key to abut against the worm. When the flat key is fitted into the first keyway, by increasing the frictional force between the second threaded locking member and the flat key, the relative position between the mounting member and the worm is fixed. When the flat key is slidably fitted into the first keyway, by increasing the frictional force between the flat key and the first chute, and its contact area is relatively large, the relative position between the mounting member and the worm can be effectively fixed.

[0021] As a further preference, anti-slip lines are provided on the outer wall of the annular handle.

[0022] By adopting the above technical solution, the frictional force between the hand and the annular handle is enhanced, so that it is convenient to rotate the annular handle to drive the worm to rotate.

[0023] Generally speaking, compared with the prior art by the above technical solutions conceived in this application, the following technical advantages are mainly presented:

[0024] 1. In this application, after the worm gear box is connected to the valve, by adjusting the position of the handwheel body on the worm, the handwheel body moves along the axis of the worm, changing the distance between the handwheel body and the worm gear box, which can avoid installation interference between the handwheel body and valves of different shapes, making the worm gear box more applicable, effectively controlling the valve, and at the same time driving the worm to rotate by rotating the handwheel body to realize the opening and closing control of the valve.

[0025] 2. In this application, after the flat key is embedded in the first keyway for stable installation, the flat key is slidably fitted with the second keyway on the handwheel body. When the handwheel body slides, the flat key guides the handwheel body to improve the sliding stability of the handwheel body.

[0026] 3. In this application, positioning bosses are provided at both ends of the flat key to position the flat key, making the flat key and the handwheel body relatively fixed. When the handwheel body moves, the first keyway guides the flat key and the handwheel body to improve the stability of their sliding.

[0027] 4. In this application, by rotating the second threaded locking member to move it into the second threaded hole, the second threaded locking member pushes the flat key to abut against the worm. When the flat key is embedded and adapted to the first keyway, by increasing the friction force between the second threaded locking member and the flat key, the relative position between the mounting member and the worm is fixed. When the flat key is slidably adapted to the first keyway, by increasing the friction force between the flat key and the first chute, and its contact area is relatively large, the relative position between the mounting member and the worm can be effectively fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the valve worm gear box provided in Embodiment 1;

[0029] Figure 2 is a schematic diagram of the connection structure between the handwheel body and the worm provided in Embodiment 1;

[0030] Figure 3 is Figure 2 a schematic diagram of the overall structure of the flat key in

[0031] Figure 4 is a schematic diagram of the installation structure of the first threaded locking member provided in Embodiment 1;

[0032] Figure 5 is a schematic diagram of the connection structure between the handwheel body and the worm provided in Embodiment 2.

[0033] In all the drawings, the same reference numerals are used to denote the same elements or structures, where:

[0034] 1. Worm gear box body; 2. Worm; 21. First keyway; 3. Handwheel body; 31. Axial hole; 32. Second keyway; 33. Ring-shaped handle; 34. Mounting member; 341. First threaded hole; 342. Second threaded hole; 35. Connecting rod; 4. Locking assembly; 41. First threaded locking member; 42. Second threaded locking member; 5. Flat key; 51. Positioning boss. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the objectives, technical solutions and advantages of this application clearer, the following further elaborates on this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0036] Embodiment 1:

[0037] Refer to Figures 1-3, a valve worm gear box disclosed in the present application includes a worm gear box main body 1, a worm 2, a handwheel main body 3 and a locking assembly 4. The worm 2 is rotatably connected to the worm gear box main body 1, and the rotation axis direction of the worm 2 is on the same straight line as its axis. A worm gear is usually rotatably connected in the worm gear box main body 1. The worm gear meshes with the worm 2. When the worm gear box is connected to the valve, the worm gear is connected to the valve core shaft. Rotating the worm 2 drives the worm gear and the valve core shaft to rotate, thereby controlling the opening and closing of the valve.

[0038] In this embodiment, the handwheel main body 3 is installed on the worm 2 to drive the worm 2 to rotate. The connection between the handwheel main body 3 and the worm 2 is detachable, and the handwheel main body 3 can be movably arranged along the axis direction of the worm 2, and the handwheel main body 3 and the worm 2 are locked by the locking assembly 4.

[0039] Specifically, the handwheel main body 3 is provided with a shaft hole 31 for the worm 2 to pass through. The handwheel main body 3 includes an annular handle 33, a mounting member 34 and a plurality of connecting rods 35. Anti-slip patterns are engraved on the outer wall of the annular handle 33. The mounting member 34 is fixedly connected to one side of the annular handle 33 through a plurality of connecting rods 35. The shaft hole 31 is opened on the mounting member 34 and the shaft hole 31 is concentric with the center of the annular handle 33. A flat key 5 is provided on the inner wall of the shaft hole 31. A first key groove 21 is opened on the worm 2 along its axis direction. After the handwheel main body 3 is installed on the worm 2, the flat key 5 is inserted into the first key groove 21. When the annular handle 33 is rotated, the mounting member 34 is driven to rotate through the connecting rods 35, and then the worm 2 is driven to rotate through the flat key 5. A second key groove 32 for installing the flat key 5 is opened on the inner wall of the shaft hole 31, and the second key groove 32 extends to both ends of the mounting member 34 to form an opening. In this embodiment, the length of the flat key 5 is less than the length of the first key groove 21. Positioning bosses 51 are fixedly connected to both ends of the flat key 5. After the flat key 5 is installed in the second key groove 32, the two positioning bosses 51 are respectively attached to the end faces of the handwheel main body 3, so that the positions of the flat key 5 and the handwheel main body 3 are relatively fixed. The first key groove 21 extends to the end of the worm 2 away from the worm gear box main body 1 to form an opening. The flat key 5 is slidably adapted to the first key groove 21. The flat key 5 is inserted into the first key groove 21 from the opening, so that the worm 2 can be inserted into the shaft hole 31, which is convenient for the installation and disassembly of the handwheel main body 3. At the same time, the handwheel main body 3 and the flat key 5 can slide along the opening direction of the first key groove 21 to adjust the position.

[0040] Further, the locking assembly 4 includes a second threaded locking member 42. Both the first threaded locking member 41 and the second threaded locking member 42 are hexagon head bolts or socket head cap screws. A second threaded hole 342 communicating with the shaft hole 31 is formed on the mounting member 34, specifically by drilling a through hole and then tapping threads. The second threaded locking member 42 is threadedly connected and adapted to the second threaded hole 342. The second threaded hole 342 communicates with the shaft hole 31 through a second keyway 32. After the second threaded locking member 42 enters the second keyway 32, it can push the flat key 5 to abut against the worm 2. When the flat key 5 is fitted into the first keyway 21, by increasing the friction between the second threaded locking member 42 and the flat key 5, the relative position between the mounting member 34 and the worm 2 is fixed. When the flat key 5 is slidably fitted into the first keyway 21, by increasing the friction between the flat key 5 and the first chute, and with a relatively large contact area, the relative position between the mounting member 34 and the worm 2 can be effectively fixed.

[0041] In another feasible embodiment, referring to Figure 4 , the locking assembly 4 includes a first threaded locking member 41. A first threaded hole 341 communicating with the shaft hole 31 is formed on the mounting member 34, specifically by drilling a through hole and then tapping threads. The first threaded locking member 41 is threadedly connected and adapted to the first threaded hole 341. After the first threaded locking member 41 passes through the first threaded hole 341 and enters the shaft hole 31, it can abut against the worm 2, increasing the friction between the first threaded locking member 41 and the worm 2, thereby fixing the relative position between the mounting member 34 and the worm 2.

[0042] Embodiment 2:

[0043] Referring to Figure 5 , the difference between this embodiment and Embodiment 1 is that in this embodiment, the flat key 5 and the first keyway 21 have the same length and the flat key 5 is fitted into the first keyway 21. At the same time, the flat key 5 is slidably fitted into the second keyway 32. When the handwheel body 3 is slid, the second keyway 32 moves relative to the flat key 5, and the handwheel body 3 is guided by the flat key 5 to improve the sliding stability of the handwheel body 3. When the handwheel body 3 slides to the end of the worm 2, it can be disassembled.

[0044] It should be understood that expressions such as "including" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit the existence of one or more additional functions, operations, and constituent elements. In this application, terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or a combination thereof, but do not exclude the existence or possibility of addition of one or more other characteristics, numbers, operations, constituent elements, components, or a combination thereof.

[0045] It should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0047] In the present application, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0048] Those skilled in the art can easily understand that the above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application should be included within the protection scope of the present application.

Claims

1. A valve worm gear box, characterized in that, It includes a worm gear box body (1), a worm (2) and a handwheel body (3). The worm (2) is rotatably connected to the worm gear box body (1), and the direction of the rotation axis of the worm (2) is on the same straight line as its axis. The handwheel body (3) is detachably connected to the worm (2) to drive the worm (2) to rotate, and the handwheel body (3) is movably arranged along the axis direction of the worm (2). This worm gear box also includes a locking assembly (4) for locking the handwheel body (3) and the worm (2).

2. The valve worm gear box according to claim 1, characterized in that, An axial hole (31) for the worm (2) to pass through is provided on the handwheel body (3). A flat key (5) is provided on the inner wall of the axial hole (31). A first keyway (21) is provided on the worm (2) along the axial direction. The flat key (5) is inserted into the first keyway (21), and a second keyway (32) for installing the flat key (5) is provided on the inner wall of the axial hole (31).

3. The valve worm gear box according to claim 2, characterized in that, The flat key (5) is embedded and adapted to the first keyway (21) and is slidably adapted to the second keyway (32).

4. The valve worm gear box according to claim 2, wherein Positioning bosses (51) are fixedly connected to both ends of the flat key (5). The two positioning bosses (51) are respectively in contact with the end faces of the handwheel body (3), and the flat key (5) is slidably adapted to the first keyway (21).

5. The valve worm gear box according to claim 4, characterized in that, The first keyway (21) extends to the end of the worm (2) away from the worm gear box body (1) to form an opening.

6. A valve worm gear box according to any one of claims 2-5, characterized in that, The handwheel body (3) includes an annular handle (33), a mounting member (34) and a plurality of connecting rods (35). The mounting member (34) is fixedly connected to one side of the annular handle (33) through a plurality of connecting rods (35). The axial hole (31) is provided on the mounting member (34), and the axial hole (31) is concentric with the center of the annular handle (33).

7. The valve worm gear box according to claim 6, characterized in that, The locking assembly (4) includes a first threaded locking member (41). A first threaded hole (341) communicating with the axial hole (31) is provided on the mounting member (34). The first threaded locking member (41) is threadedly connected and adapted to the first threaded hole (341). The first threaded locking member (41) can abut against the worm (2) after passing through the first threaded hole (341).

8. The valve worm gear box according to claim 6, characterized in that, The locking assembly (4) includes a second threaded locking member (42). A second threaded hole (342) communicating with the axial hole (31) is provided on the mounting member (34). The second threaded locking member (42) is threadedly connected and adapted to the second threaded hole (342). The second threaded hole (342) communicates with the second keyway (32). The second threaded locking member (42) can push the flat key (5) to abut against the worm (2).

9. A valve worm gear box according to claim 6, characterized in that, Anti-slip lines are provided on the outer wall of the annular handle (33).

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