Electric butterfly valve with protective device

Abstract

The utility model provides an electric butterfly valve with a protection device, which belongs to the technical field of electric butterfly valves and comprises a butterfly valve structure, the butterfly valve structure comprises a valve body, a valve core protection mechanism is arranged in the valve body and comprises a first valve plate, a second valve plate and a valve rod, and the first valve plate is in threaded connection with the second valve plate. The first valve plate is provided with a connecting port, the second valve plate is provided with a connecting port, the connecting port is in threaded connection with the lower end of the valve rod, the inner cavity of the first valve plate and the inner cavity of the second valve plate are each provided with a spiral installation groove and an electric heating wire in the spiral installation groove, and each spiral installation groove is connected with a positioning frame through a screw. According to the butterfly valve, the situation that the valve plate in the butterfly valve and the inner wall of the valve body are combined together is effectively avoided in a pipeline system which is colder in climate and prone to freezing, and the situation that the sealing performance is affected due to the fact that a worker forcibly drives the motor without knowing that the interior of a pipeline is frozen, and the valve plate deforms is avoided.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of electric butterfly valves, in particular to an electric butterfly valve with a protective device. Background Art

[0002] Electric butterfly valve is a type of electric valve and electric regulating valve. The main connection methods of electric butterfly valve are: flange type and wafer type. The electric butterfly valve controls the switch of the butterfly valve through the power signal. This product can be used as a cut-off valve, control valve and check valve in the pipeline system. It is equipped with a manual control device. Once a power failure occurs, it can be temporarily operated manually without affecting its use. It is widely used in food, environmental protection, light industry, petroleum, chemical industry, water treatment, municipal engineering, papermaking, electricity, water treatment and other industries.

[0003] The electric butterfly valve includes a drive unit, a valve stem, a bushing, a valve seat, a valve plate and a valve body. When the electric butterfly valve is used as a cut-off valve in a pipeline system, if the temperature in the geographical environment of the pipeline system is low, the internal water flow will freeze, causing the valve plate in the butterfly valve and the inner wall of the valve body to freeze together. If the staff is not aware of the ice in the pipeline, they drive the motor, making the valve plate unable to rotate to control the on and off of the pipeline. At this time, the motor cannot reach the rated speed, and the overload operation increases the motor current, exceeding the allowable temperature rise of the motor, damaging the motor insulation, and causing direct damage to the motor. At the same time, forcibly driving the valve plate to rotate will also cause the valve plate itself to deform, making it impossible to seal tightly, and the sealing performance is reduced. Utility Model Content

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the present invention mainly provides an electric butterfly valve with a protective device, which is used to solve the technical problem raised in the above background technology that when the staff is not aware of the ice in the pipeline, the motor is driven, which easily causes damage to the motor and deformation of the valve plate.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] An electric butterfly valve with a protective device comprises a butterfly valve structure, the butterfly valve structure comprises a valve body, a valve core protective mechanism is arranged in the valve body, the valve core protective mechanism comprises a first valve plate, a second valve plate and a valve stem, the first valve plate and the second valve plate are threadedly connected, a connecting port is arranged on the second valve plate, and the connecting port and the lower end of the valve stem are threadedly connected, the inner cavities of the first valve plate and the second valve plate are both provided with spiral mounting grooves and electric heating wires in the spiral mounting grooves, and each spiral mounting groove is connected to a positioning frame by screws.

[0007] Furthermore, a second annular sealing ring is arranged in a groove formed by the threaded connection between the first valve plate and the second valve plate, and an opening is arranged on the second annular sealing ring.

[0008] Furthermore, a through hole is provided on the valve stem.

[0009] Furthermore, a mounting platform is provided on the upper side of the outer wall of the valve body, and the mounting platform is connected to the shell by screws. A rotating shaft is provided in the inner cavity formed by the shell and the mounting platform, and the lower end of the rotating shaft and the mounting platform are rotatably connected. A first gear is provided on the rotating shaft, and the first gear is meshed with a second gear, and the second gear is provided on the valve stem.

[0010] Furthermore, a motor is arranged on the upper side of the outer wall of the shell, and the output end of the motor is connected to the upper end of the rotating shaft.

[0011] Furthermore, a wire interface is provided on one side of the outer wall of the shell.

[0012] Furthermore, annular grooves are provided at the interface positions on both sides of the valve body, and a first annular sealing ring is provided in each of the annular grooves.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model realizes the driving of the valve plate to control the on-and-off of the water flow in the pipeline by means of the valve body, shell, rotating shaft, first gear, second gear and motor. The mutual cooperation among the first valve plate, the second valve plate, the valve stem, the spiral mounting groove, the electric heating wire, the positioning frame and the second annular sealing ring can effectively avoid the valve plate and the inner wall of the valve body in the butterfly valve from being stuck together in the pipeline system with cold climate and easy to freeze, and prevent the staff from forcibly driving the motor without knowing that the pipeline is frozen, which causes the valve plate to deform and affects the sealing performance. The utility model also has a stable structure and is easy to install, so it has certain practical value.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure decomposition of the utility model;

[0018] Figure 3 It is a schematic diagram of the exploded view of the valve core protection mechanism of the utility model.

[0019] In the figure: 1. butterfly valve structure; 11. valve body; 111. annular groove; 112. mounting platform; 12. housing; 121. wire interface; 13. rotating shaft; 14. first gear; 15. second gear; 16. motor; 17. first annular sealing ring; 2. valve core protection mechanism; 21. first valve plate; 22. second valve plate; 221. connecting port; 23. valve stem; 231. through hole; 24. spiral mounting groove; 25. electric heating wire; 26. positioning frame; 27. second annular sealing ring; 271. opening. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field of the present invention. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Please refer to the attached Figure 1-3 , an electric butterfly valve with a protective device, comprising a butterfly valve structure 1, the butterfly valve structure 1 comprising a valve body 11, a valve core protection mechanism 2 is arranged in the valve body 11, the valve core protection mechanism 2 comprises a first valve disc 21, a second valve disc 22 and a valve stem 23, the first valve disc 21 and the second valve disc 22 are threadedly connected, a connecting port 221 is arranged on the second valve disc 22, and the connecting port 221 and the lower end of the valve stem 23 are threadedly connected, the inner cavities of the first valve disc 21 and the second valve disc 22 are both provided with a spiral mounting groove 24 and an electric heating wire 25 in the spiral mounting groove 24, and each spiral mounting groove 24 is connected to a positioning frame 26 by screws.

[0024] The above structure uses the valve core protection mechanism 2 to effectively avoid the valve plate in the butterfly valve and the inner wall of the valve body 11 from being stuck together in a pipeline system with a cold climate and easy to freeze. It prevents the staff from forcibly driving the motor 16 without knowing that there is ice in the pipeline, causing the valve plate to deform and affecting the sealing. The structure is stable and easy to install, and has certain practical value.

[0025] The specific operation is as follows. If the butterfly valve is to be closed, first turn on the motor 16, and then the motor 16 drives the rotating shaft 13 to rotate, and then the first gear 14 on the rotating shaft 13 drives the second gear 15 to rotate, and then the valve stem 23 on the second gear 15 drives the valve plate to rotate to close the butterfly valve. If the water flow in the pipeline is frozen, the electric heating wire 25 is connected to heat the first valve plate 21 and the second valve plate 22, so that the part of the valve plate and the inner wall of the valve body 11 that is bound by water melts, and then the motor 16 can drive the valve plate to rotate.

[0026] Please refer to the attached Figure 1 and attached Figure 2 The upper side of the outer wall of the valve body 11 is provided with a mounting platform 112, and the mounting platform 112 is connected to the housing 12 by screws. A rotating shaft 13 is provided in the inner cavity formed by the housing 12 and the mounting platform 112. The lower end of the rotating shaft 13 and the mounting platform 112 are rotatably connected. A first gear 14 is provided on the rotating shaft 13, and the first gear 14 is meshedly connected with a second gear 15. The second gear 15 is provided on the valve stem 23. A motor 16 is provided on the upper side of the outer wall of the housing 12, and the output end of the motor 16 is connected to the upper end of the rotating shaft 13. The valve stem 23 is driven by the cooperation among the motor 16, the rotating shaft 13, the first gear 14 and the second gear 15. A wire interface 121 is provided on one side of the outer wall of the shell 12. The wire interface 121 facilitates the connection of the wire connected to the electric heating wire 25. Annular grooves 111 are provided at the interface positions on both sides of the valve body 11. A first annular sealing ring 17 is provided in each of the annular grooves 111. The first annular sealing ring 17 is used to seal the connection between the valve body 11 and the pipeline.

[0027] Please refer to the attached Figure 1 and attached Figure 3 A second annular sealing ring 27 is arranged in the groove formed by the threaded connection of the first valve disc 21 and the second valve disc 22, and an opening 271 is arranged on the second annular sealing ring 27. Through the opening 271, the second annular sealing ring 27 is sleeved around the connecting port 221 to provide space. A through hole 231 is arranged on the valve stem 23. Through the through hole 231, the wire connected to the electric heating wire 25 is introduced from the inside of the valve body 11 into the inside of the shell 12.

[0028] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An electric butterfly valve with a protection device, comprising a butterfly valve structure (1), the butterfly valve structure (1) comprising a valve body (11), a valve core protection mechanism (2) being arranged in the valve body (11), characterized in that: The valve core protection mechanism (2) comprises a first valve plate (21), a second valve plate (22) and a valve stem (23); the first valve plate (21) and the second valve plate (22) are connected by threads; the second valve plate (22) is provided with a connection port (221), and the connection port (221) and the lower end of the valve stem (23) are connected by threads; the inner cavities of the first valve plate (21) and the second valve plate (22) are both provided with spiral mounting grooves (24) and electric heating wires (25) in the spiral mounting grooves (24); and each spiral mounting groove (24) is connected to a positioning frame (26) by screws.

2. The electric butterfly valve with a protective device according to claim 1, characterized in that: A second annular sealing ring (27) is arranged in a groove formed by threaded connection of the first valve plate (21) and the second valve plate (22), and an opening (271) is arranged on the second annular sealing ring (27).

3. The electric butterfly valve with a protective device according to claim 1, characterized in that: The valve stem (23) is provided with a through hole (231).

4. The electric butterfly valve with a protective device according to claim 1, characterized in that: A mounting platform (112) is provided on the upper side of the outer wall of the valve body (11), and the mounting platform (112) is connected to the housing (12) via screws. A rotating shaft (13) is provided in an inner cavity formed by the housing (12) and the mounting platform (112), and a lower end of the rotating shaft (13) and the mounting platform (112) are rotatably connected. A first gear (14) is provided on the rotating shaft (13), and the first gear (14) is meshingly connected to a second gear (15), and the second gear (15) is provided on the valve stem (23).

5. The electric butterfly valve with a protective device according to claim 4, characterized in that: A motor (16) is provided on the upper side of the outer wall of the housing (12), and an output end of the motor (16) is connected to the upper end of the rotating shaft (13).

6. The electric butterfly valve with a protective device according to claim 5, characterized in that: A wire interface (121) is provided on one side of the outer wall of the housing (12).

7. The electric butterfly valve with a protective device according to claim 4, characterized in that: Annular grooves (111) are provided at the interface positions on both sides of the valve body (11), and a first annular sealing ring (17) is provided in each annular groove (111).

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