Worm gear case executing mechanism and valve

Abstract

The utility model belongs to the field of valve executing mechanisms, and particularly discloses a worm gear case executing mechanism and a valve, the worm gear case executing mechanism comprises a worm gear case body and a pointer, one side of the worm gear case body protrudes outwards to form a first observation face and a second observation face which are located in two different directions, and identification scales are arranged on the first observation face and the second observation face; the pointer is arranged on the first observation face, one end of the pointer is bent towards the second observation face and extends to the second observation face, and the pointer is connected with a worm gear in the worm gear case body. According to the worm gear case executing mechanism, the indication position of the pointer can be visually observed from the first observation face and the second observation face, and therefore the opening and closing states of a valve can be determined when the worm gear case executing mechanism is vertically and horizontally installed.

Description

Technical Field

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

[0002] Valve actuators are usually arranged in a fluid medium pipeline system for truncating and opening the medium in the pipeline and adjusting the pipeline flow rate. The worm gear box actuator is a common valve actuator that drives the worm gear to rotate to open and close the valve. It usually has a switch indicator on the side of the worm gear. When the worm gear box actuator is vertically installed in a valve well after being connected to the valve, the opening and closing states of the valve can be directly known by observing the switch indicator. However, some worm gear box actuators need to be horizontally installed in the valve well after being connected to the valve, so that the switch indicator cannot be directly observed, and it is difficult to know the opening and closing states of the valve. Summary of the Utility Model

[0003] Aiming at the defects of the prior art, this application provides a worm gear box actuator and a valve, aiming to solve the problem that when the worm gear box actuator is horizontally installed in a valve well after being connected to the valve, the opening and closing states of the valve cannot be observed according to the switch indicator.

[0004] A worm gear box actuator provided by this application specifically includes a worm gear box body and a pointer. One side of the worm gear box body bulges outwards to form a first observation surface and a second observation surface in two different directions, and both the first observation surface and the second observation surface are provided with marking scales; the pointer is arranged on the first observation surface, one end of the pointer bends towards the second observation surface and extends to the second observation surface, and the pointer is connected to the worm gear inside the worm gear box body.

[0005] Through the above technical solution conceived by this application, compared with the prior art, since the pointer on the worm gear box body of this application simultaneously indicates the marking scales on the first observation surface and the second observation surface, the opening and closing of the valve are realized by the rotation of the worm gear. At the same time, the worm gear can drive the pointer to rotate, and the indication position of the pointer can be directly observed from both the first observation surface and the second observation surface. When the worm gear box actuator of this application is vertically and horizontally installed, the opening and closing states of the valve can be determined according to the indication position of the pointer.

[0006] As a further preference, the first observation surface is circular and perpendicular to the rotating shaft of the worm gear, and the pointer is connected to the rotating shaft of the worm gear through a connecting piece.

[0007] By adopting the above technical solution, when the worm gear rotates, it can drive the pointer to rotate, and the pointer is connected to the rotating shaft of the worm gear, so that the end of the pointer can move along the outer circumference of the first observation surface, and the movement is stable and uniform, making the indicated reading more accurate.

[0008] As a further preference, the identification scales on the first observation surface are arranged in a circumferential manner along the edge; the identification scales on the second observation surface correspond to the positions of the identification scales on the first observation surface.

[0009] By adopting the above technical solution, the pointer can simultaneously indicate the identification scales on the first observation surface and the second observation surface, and the positions of the pointer on the first observation surface and the second observation surface change simultaneously when the pointer rotates, so as to facilitate observation from two different directions and accurate reading.

[0010] As a further preference, the second observation surface is a cylindrical surface, and one end of the cylindrical surface is connected to the outer periphery of the first observation surface.

[0011] By adopting the above technical solution, the identification scales on the second observation surface can be intuitively seen from an angle perpendicular to the first observation surface, and then the open and closed states of the valve can be known.

[0012] As a further preference, the second observation surface is a conical surface, and one end of the conical surface is connected to the outer periphery of the first observation surface.

[0013] By adopting the above technical solution, since the conical surface is an inclined surface, when the worm gear box is inclined, the identification scales on the second observation surface can be intuitively seen.

[0014] As a further preference, the connecting member includes a rotating cover and a first threaded member, the pointer is fixedly connected to the middle of the rotating cover, a through hole for the first threaded member to pass through is formed on the rotating cover, and the first threaded member passes through the through hole and is threadedly connected to the worm gear.

[0015] By adopting the above technical solution, the rotating cover and the worm gear are connected into a whole by the first threaded member. When the worm gear rotates, it drives the rotating cover and the pointer to rotate, so that the pointer can indicate different positions of the identification scales, and the rotating cover and the pointer can be disassembled and assembled, which is convenient for maintenance.

[0016] As a further preference, at least two first threaded members and through holes are provided, and the two through holes are symmetrically arranged.

[0017] By adopting the above technical solution, the connection between the rotating cover and the worm gear is more stable, and the stability of the worm gear driving the rotating cover to rotate is improved.

[0018] As a further preference, the connecting member includes a second threaded member, a through hole is formed on the pointer, and the second threaded member passes through the through hole and is threadedly connected to the worm gear.

[0019] By adopting the above technical solution, the pointer and the worm gear can be directly connected into a whole by the second threaded member, which simplifies the equipment structure and reduces the manufacturing cost of the equipment.

[0020] As a further preference, the width of the pointer gradually decreases from the connecting end towards the bending end.

[0021] By adopting the above technical solution, the width of the pointer gradually decreases to improve its indication accuracy.

[0022] A valve provided by the present application specifically includes the above-mentioned actuator, and the output shaft of the actuator is connected to the valve core rotating shaft.

[0023] By adopting the above technical solution, the actuator can be used to control the rotation of the valve core, so that the angle of the valve core can be directly seen according to the angle indication of the pointer.

[0024] Generally speaking, compared with the prior art, the above technical solutions conceived by the present application mainly have the following technical advantages:

[0025] 1. In the present application, the opening and closing of the valve can be realized by the rotation of the worm gear. The pointer on the worm gear box body simultaneously indicates the identification scales on the first observation surface and the second observation surface. When the worm gear rotates, it drives the pointer to rotate, and the indication position of the pointer can be directly observed from the first observation surface and the second observation surface. When the worm gear box actuator of the present application is installed vertically and horizontally, the opening and closing state of the valve can be determined according to the indication position of the pointer, with better applicability and more convenient use.

[0026] 2. In the present application, the pointer can be disassembled and is easy to install. When the pointer is damaged, it is convenient to disassemble and replace it to ensure the indication accuracy.

[0027] 3. In the present application, the width of the pointer gradually decreases towards the bending end to improve its indication accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the overall structural schematic diagram of the first perspective of the actuator provided in Embodiment 1 of the present application;

[0029] Figure 2 is the overall structural schematic diagram of the second perspective of the actuator provided in Embodiment 1 of the present application;

[0030] Figure 3 is the front view structural schematic diagram of the actuator provided in Embodiment 1 of the present application;

[0031] Figure 4 is the front view structural schematic diagram of the actuator provided in Embodiment 2 of the present application.

[0032] In all the drawings, the same reference numerals are used to represent the same elements or structures, where:

[0033] 1. Worm gear box body; 11. Main box body; 12. Mounting plate; 13. Wear-resistant ring; 14. Flange; 2. Pointer; 21. Through hole; 3. First observation surface; 4. Second observation surface; 5. Identification scale; 6. Connecting piece; 61. Rotating cover; 611. Perforation; 62. First threaded piece; 63. Second threaded piece; 7. Worm; 8. Handwheel. Detailed implementation mode

[0034] In order to make the purpose, technical solution and advantages of this application clearer, the following further details 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.

[0035] Embodiment 1:

[0036] Refer to Figure 1 , this application discloses a worm gear box actuator including a worm gear box body 1, a pointer 2, a worm gear, a worm 7 and a handwheel 8. The worm gear box body 1 includes a main box body 11 and a mounting plate 12. The main box body 11 and the mounting plate 12 are fixedly connected by bolts. A flange is fixedly connected to the side of the mounting plate 12 facing away from the main box body 11. The mounting plate 12 is fixedly connected to the valve through the flange. A perforation 611 is formed in the middle of the mounting plate 12 and a wear-resistant ring 13 is fixedly connected at the perforation 611 to facilitate the connection between the worm gear in the worm gear box body 1 and the valve core, so that the rotation of the worm gear can drive the rotation of the valve core.

[0037] In this embodiment, the worm gear is rotatably connected inside the worm gear box body 1 and the rotating shaft is coaxially arranged with the perforation 611 on the mounting plate 12. The worm 7 is rotatably connected to the worm gear box body 1 and one end extends into the worm gear box body 1 to mesh with the worm gear. The handwheel 8 is fixedly connected to the other end of the worm 7. Rotating the handwheel drives the rotation of the worm 7, thereby driving the rotation of the worm gear. This structure is a common worm gear structure in the art and is not shown in the figure.

[0038] Furthermore, one side of the worm gear box body 1 bulges outwards. Specifically, the main box body 11 bulges outwards along the axis direction of the worm gear to form a first observation surface 3 and a second observation surface 4 in two different directions. The first observation surface 3 is circular and perpendicular to the axis of the worm gear. Identification scales 5 are engraved on both the first observation surface 3 and the second observation surface 4. The identification scales 5 on the first observation surface 3 are arranged in a ring along the edge. The identification scales 5 on the second observation surface 4 correspond to the positions of the identification scales 5 on the first observation surface 3. The pointer 2 is arranged on the first observation surface 3. One end of the pointer 2 bends towards the second observation surface 4 and extends to the second observation surface 4. The pointer 2 is connected to the worm gear inside the worm gear box body 1. Specifically, the pointer 2 is connected to the axis of the worm gear through a connecting piece 6. When the worm gear rotates, it drives the pointer 2 to rotate. The pointer 2 indicates the identification scales 5 on the first observation surface 3 and the second observation surface 4. That is, the on-off state of the valve can be intuitively seen from both the first observation surface 3 and the second observation surface 4. Moreover, the width of the pointer 2 gradually decreases from the connecting end to the bending end, improving the indication accuracy.

[0039] Furthermore, the second observation surface 4 is a cylindrical surface or a conical surface. One end of the cylindrical surface or the conical surface is connected to the outer periphery of the first observation surface 3, enabling the pointer 2 to indicate well on the first observation surface 3 and the second observation surface 4 after bending, facilitating observation from two directions.

[0040] In this embodiment, the connecting piece 6 includes a rotating cover 61 and a first threaded part 62. The first threaded part 62 is a screw. The pointer 2 is fixedly connected to the middle of the rotating cover 61. At least two through holes 611 for the first threaded part 62 to pass through are provided on the rotating cover 61. The two through holes 611 are symmetrically arranged. The first threaded part 62 passes through the through holes 611 and is threadedly connected to the worm gear. The first threaded part 62 connects the rotating cover 61 and the worm gear into a whole, enabling the worm gear to drive the rotating cover 61 and the pointer 2 to rotate when it rotates, so that the pointer 2 can indicate different positions of the identification scale 5. The rotating cover 61 and the pointer 2 are convenient for installation and disassembly.

[0041] Embodiment 2:

[0042] The difference between this embodiment and Embodiment 1 is that the connecting piece 6 includes a second threaded part 63. The second threaded part 63 is a screw. A through hole 21 is provided on the pointer 2. The second threaded part 63 passes through the through hole 21 and is threadedly connected to the worm gear, enabling the pointer 2 to be directly connected to the worm gear into a whole, simplifying the structure.

[0043] This application also discloses a valve including the above-mentioned worm gear box actuator. The output shaft of the actuator is connected to the valve core shaft. Specifically, the worm gear in the worm gear box body 1 is connected to the valve core shaft through a connecting shaft passing through the through hole 611 on the mounting plate 12, and the worm gear, the connecting shaft, and the valve core are on the same axis. This connecting shaft is the output shaft of the actuator to realize the rotation of the worm gear driving the valve core to rotate.

[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 components, and do not limit the existence of one or more additional functions, operations, and components. In this application, terms such as "including" and / or "having" may be interpreted to indicate a specific characteristic, number, operation, component, component, or a combination thereof, but cannot be interpreted to exclude the existence or possibility of addition of one or more other characteristics, numbers, operations, components, 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 this 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 therefore cannot be understood as a limitation to this application.

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

[0047] In this application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", etc. 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 this application can be understood according to specific circumstances.

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

Claims

1. A worm gear box actuator, characterized in that: The invention comprises a worm gear box body (1) and a pointer (2), wherein one side of the worm gear box body (1) protrudes outward to form a first observation surface (3) and a second observation surface (4) located in two different directions, and the first observation surface (3) and the second observation surface (4) are both provided with marking scales (5); the pointer (2) is arranged on the first observation surface (3), one end of the pointer (2) is bent toward the second observation surface (4) and extends to the second observation surface (4), and the pointer (2) is connected to the worm gear inside the worm gear box body (1).

2. A worm gear box actuator according to claim 1, characterized in that: The first observation surface (3) is circular and perpendicular to the rotation axis of the worm wheel, and the pointer (2) is connected to the rotation axis of the worm wheel via a connecting member (6).

3. A worm gear box actuator as claimed in claim 2, characterized in that: The marking scales (5) on the first observation surface (3) are arranged around the edge; and the marking scales (5) on the second observation surface (4) correspond in position to the marking scales (5) on the first observation surface (3).

4. A worm gear box actuator as claimed in claim 2, characterized in that: The second observation surface (4) is a cylindrical surface, one end of which is connected to the outer periphery of the first observation surface (3).

5. A worm gear box actuator as claimed in claim 2, characterized in that: The second observation surface (4) is a conical surface, one end of which is connected to the outer periphery of the first observation surface (3).

6. A worm gear box actuator as claimed in claim 2, characterized in that: The connecting member (6) comprises a rotating cover (61) and a first threaded member (62); the pointer (2) is fixedly connected to the middle portion of the rotating cover (61); a through hole (611) is provided on the rotating cover (61) for the first threaded member (62) to pass through; the first threaded member (62) passes through the through hole (611) and is threadedly connected to the worm gear.

7. A worm gear box actuator as claimed in claim 6, characterized in that: At least two of the first threaded member (62) and the through hole (611) are provided, and the two through holes (611) are symmetrically arranged.

8. A worm gear box actuator as claimed in claim 2, characterized in that: The connecting member (6) comprises a second threaded member (63), a through hole (21) is provided on the pointer (2), and the second threaded member (63) passes through the through hole (21) and is threadably connected to the worm gear.

9. A worm gear box actuator as claimed in claim 1, characterized in that: The width of the pointer (2) gradually decreases from the connecting end to the bending end.

10. A valve, comprising the actuator according to any one of claims 1 to 9, characterized in that: The output shaft of the actuator is connected to the valve core rotating shaft of the valve.

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