Valve rod assembly of butterfly valve

Abstract

The utility model discloses a butterfly valve rod component, which relates to the technical field of butterfly valve rods and comprises a pipeline for fluid to pass through, a mounting seat is fixed at the top end of the pipeline, a turning plate for controlling the flow rate of the fluid is arranged in an inner cavity of the mounting seat, and the top end of the turning plate is connected with a rotating wheel for controlling the turning plate to rotate through a valve rod. The positioning mechanism is arranged on the rotating wheel and the mounting seat; the positioning mechanism comprises a reset unit and a limiting unit; and the limiting unit is used for limiting the angle of the rotating wheel after rotation. Through the arrangement of the positioning mechanism, in the process of rotating the rotating wheel to open the turning plate, the movable ring can be synchronously held by a hand, so that the movable ring is attached to the rotating wheel, limiting on the rotating wheel is relieved, the angle of the rotating wheel is convenient to adjust, and after the rotating wheel is rotated to the required angle, the rotating wheel is convenient to limit; and deviation of the set angle of the rotating wheel is avoided, and the structure angle and operation are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve stems, in particular to a butterfly valve stem assembly. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc, which rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a cutting and throttling role in the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation.

[0003] In the prior art, in order to adapt to different situations, it is often necessary to control the valve stem to rotate to different angles to control the flow rate of the internal fluid or gas. However, when the flow rate or the impact force of the gas is large, the angle set by the valve stem cannot be well guaranteed. For this reason, the utility model proposes a butterfly valve stem assembly. Utility Model Content

[0004] The purpose of the utility model is to provide a butterfly valve stem assembly in order to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a butterfly valve stem assembly, comprising a pipeline through which fluid passes, a mounting seat fixed to the top of the pipeline, a flap for controlling the flow rate of the fluid provided in the inner cavity of the mounting seat, a rotating wheel for controlling the rotation of the flap connected to the top of the flap through a valve stem, and a positioning mechanism provided on the rotating wheel and the mounting seat;

[0006] The positioning mechanism includes a reset unit and a limit unit;

[0007] The limiting unit is used to limit the angle of the rotating wheel after rotation;

[0008] The reset unit is used to always provide a limiting elastic force for the limiting unit.

[0009] As a further solution of the utility model: the reset unit includes a movable ring, a movable rod, a spring, and a guide groove;

[0010] The movable ring is arranged below the rotating wheel, and the movable ring is vertically slidably connected with the rotating wheel via a movable rod;

[0011] The movable rod is fixed to the top of the movable ring and extends to the inner cavity of the rotating wheel, and the movable rod is used to provide guidance for the vertical movement of the movable ring;

[0012] The guide groove is provided in the inner cavity of the rotating wheel, and the guide groove is used to provide space for the vertical movement of the movable rod;

[0013] The two ends of the spring are respectively clamped on the top end of the movable rod and the inner cavity of the guide groove, and the spring is used to provide downward elastic force for the movable rod.

[0014] As a further solution of the utility model: the limiting unit includes a transmission rod, a limiting block, and a limiting groove;

[0015] The transmission rod is fixed on the inner side of the movable ring, and the transmission rod is used to move along with the movement of the movable rod;

[0016] The limit block is fixed at the bottom end of the transmission rod and extends to the inner cavity of the limit slot. The limit block is used to cooperate with the limit slot to limit the rotation of the rotating wheel;

[0017] The limiting groove is arranged at the top end of the mounting seat, and the limiting groove is used to provide an entry space for the limiting block so as to limit the limiting block.

[0018] As a further solution of the utility model: there are multiple limit grooves, and the multiple limit grooves are evenly distributed on the top outer wall of the mounting seat with the shaft of the rotating wheel as the center.

[0019] As a further solution of the utility model: the inner cavity of the limit groove matches the outer wall of the limit block, the outer wall of the transmission rod is an "L"-shaped structure as a whole, and the vertical rod of the transmission rod is close to the shaft position of the rotating wheel.

[0020] As a further solution of the utility model: the outer wall of the movable rod is in a "T"-shaped structure as a whole, and the inner cavity of the guide groove is consistent with the outer wall of the movable rod.

[0021] As a further solution of the utility model: the number of the movable rods, springs and guide grooves is three, and the three movable rods, springs and guide grooves are evenly distributed in the inner cavity of the rotating wheel.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] By setting up the positioning mechanism, in the process of turning the rotating wheel to open the flap, the movable ring can be held by the hand at the same time, so that the movable ring is fitted with the rotating wheel, and the limit on the rotating wheel is released, which makes it easy to adjust the angle of the rotating wheel. After rotating to the required angle, the rotating wheel can be limited to avoid the deviation of the set angle of the rotating wheel. The structural angle is convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 This is a cross-sectional view of the internal structure of the pipeline of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the positioning mechanism of the utility model.

[0027] In the figure: 1. pipeline; 2. mounting seat; 3. rotating wheel; 4. flap; 5. positioning mechanism; 501. movable ring; 502. movable rod; 503. spring; 504. transmission rod; 505. limit block; 506. limit groove; 507. guide groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 3 In the embodiment of the utility model, a butterfly valve stem assembly 1. A butterfly valve stem assembly comprises a pipeline 1 through which fluid passes, a mounting seat 2 is fixed at the top end of the pipeline 1, a flap 4 for controlling the flow rate of the fluid is arranged in the inner cavity of the mounting seat 2, a rotating wheel 3 for controlling the rotation of the flap 4 is connected to the top end of the flap 4 through a valve stem, and a positioning mechanism 5 is arranged on the rotating wheel 3 and the mounting seat 2;

[0030] The positioning mechanism 5 includes a reset unit and a limit unit;

[0031] The limiting unit is used to limit the angle of the rotating wheel 3 after rotation;

[0032] The reset unit is used to always provide limiting elastic force for the limiting unit;

[0033] The reset unit includes a movable ring 501, a movable rod 502, a spring 503, and a guide groove 507;

[0034] The movable ring 501 is arranged below the rotating wheel 3, and the movable ring 501 is vertically slidably connected with the rotating wheel 3 via a movable rod 502;

[0035] The movable rod 502 is fixed to the top of the movable ring 501 and extends to the inner cavity of the rotating wheel 3. The movable rod 502 is used to provide guidance for the vertical movement of the movable ring 501.

[0036] The guide groove 507 is provided in the inner cavity of the rotating wheel 3, and the guide groove 507 is used to provide space for the vertical movement of the movable rod 502;

[0037] The two ends of the spring 503 are respectively clamped on the top of the movable rod 502 and the inner cavity of the guide groove 507, and the spring 503 is used to provide a downward elastic force for the movable rod 502;

[0038] The limiting unit includes a transmission rod 504, a limiting block 505, and a limiting groove 506;

[0039] The transmission rod 504 is fixed on the inner side of the movable ring 501, and the transmission rod 504 is used to move along with the movement of the movable rod 502;

[0040] The limiting block 505 is fixed at the bottom end of the transmission rod 504 and extends to the inner cavity of the limiting groove 506. The limiting block 505 is used to cooperate with the limiting groove 506 to limit the rotation of the rotating wheel 3;

[0041] The limiting groove 506 is provided at the top of the mounting seat 2 , and the limiting groove 506 is used to provide an entry space for the limiting block 505 so as to limit the limiting block 505 .

[0042] In this embodiment: when it is necessary to open the flap 4 to adjust the speed of the fluid inside the pipeline 1, the rotating wheel 3 is held by the hand, and the movable ring 501 at the bottom of the rotating wheel 3 is contacted while holding it, and an upward thrust is given to the movable ring 501, so that the movable ring 501 drives the movable rod 502 to move along the inner cavity of the guide groove 507, and an extrusion force is given to the spring 503 until the upper surface of the movable ring 501 contacts the lower surface of the rotating wheel 3, and the upward movement of the movable ring 501 will also synchronously drive the transmission rod 504 and the limit block 505 to move upward, so that the limit block 505 moves from one limit groove to another. The inner cavity of 506 is moved out, and the rotation limit of the rotating wheel 3 is released. At this time, the rotating wheel 3 can be rotated, thereby driving the flap 4 connected to the rotating wheel 3 to rotate synchronously. By rotating the flap 4 to a preset angle, the control of the fluid flow rate is met. At this time, the movable ring 501 can be lowered, and the movable ring 501 will also move downward under the elastic force of the spring 503, and the limit block 505 will also enter a corresponding inner cavity of the limit groove 506, and limit the rotation of the rotating wheel 3 again, thereby preventing the flap 4 from being offset due to the impact from the fluid at the original angle. The structure is simple and the operation is convenient.

[0043] Please refer to Figure 1-Figure 3There are multiple limit grooves 506, which are evenly distributed on the top outer wall of the mounting base 2 with the shaft of the rotating wheel 3 as the center. The inner cavity of the limit groove 506 matches the outer wall of the limit block 505. The outer wall of the transmission rod 504 is an "L"-shaped structure as a whole. The vertical rod of the transmission rod 504 is close to the shaft position of the rotating wheel 3. The outer wall of the movable rod 502 is an overall "T"-shaped structure. The inner cavity of the guide groove 507 coincides with the outer wall of the movable rod 502. There are three movable rods 502, springs 503, and guide grooves 507. The three movable rods 502, springs 503, and guide grooves 507 are evenly distributed in the inner cavity of the rotating wheel 3.

[0044] In this embodiment: through this structure, the limit block 505 can move synchronously in the circumferential direction with the rotation of the rotating wheel 3, and multiple limit slots 506 are always aligned with one limit block 505, so that after the rotating wheel 3 rotates to a preset angle, the limit block 505 can enter the inner cavity of a limit slot 506 aligned with it, thereby completing the rotation limitation of the rotating wheel 3.

[0045] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A butterfly valve stem assembly, comprising a pipe (1) through which fluid passes, a mounting seat (2) being fixed at the top end of the pipe (1), a flap (4) for controlling the flow rate of the fluid being arranged in the inner cavity of the mounting seat (2), a rotating wheel (3) for controlling the rotation of the flap (4) being connected at the top end of the flap (4) through a valve stem, characterized in that: A positioning mechanism (5) disposed on the rotating wheel (3) and the mounting seat (2); The positioning mechanism (5) comprises a reset unit and a limit unit; The limiting unit is used to limit the angle of the rotating wheel (3) after rotation; the limiting unit comprises a transmission rod (504), a limiting block (505), and a limiting groove (506); the transmission rod (504) is fixed to the inner side of the movable ring (501), and the transmission rod (504) is used to move along with the movement of the movable rod (502); the limiting block (505) is fixed to the bottom end of the transmission rod (504) and extends to the inner cavity of the limiting groove (506), and the limiting block (505) is used to cooperate with the limiting groove (506) to limit the rotation of the rotating wheel (3); the limiting groove (506) is provided at the top end of the mounting seat (2), and the limiting groove (506) is used to provide an entry space for the limiting block (505) so as to limit the limiting block (505); The reset unit is used to always provide a limiting elastic force for the limiting unit, and the reset unit comprises a movable ring (501), a movable rod (502), a spring (503), and a guide groove (507); the movable ring (501) is arranged below the rotating wheel (3), and the movable ring (501) is vertically slidably connected to the rotating wheel (3) via the movable rod (502); the movable rod (502) is fixed to the top of the movable ring (501) and extends to the inner cavity of the rotating wheel (3), and the movable rod (502) is used to provide a guide for the vertical movement of the movable ring (501); the guide groove (507) is opened in the inner cavity of the rotating wheel (3), and the guide groove (507) is used to provide space for the vertical movement of the movable rod (502); the two ends of the spring (503) are respectively clamped on the top of the movable rod (502) and the inner cavity of the guide groove (507), and the spring (503) is used to always provide a downward elastic force for the movable rod (502).

2. A butterfly valve stem assembly according to claim 1, characterized in that: The number of the limiting grooves (506) is multiple, and the multiple limiting grooves (506) are evenly distributed on the top outer wall of the mounting seat (2) with the shaft of the rotating wheel (3) as the center.

3. A butterfly valve stem assembly according to claim 1, characterized in that: The inner cavity of the limiting groove (506) matches the outer wall of the limiting block (505); the outer wall of the transmission rod (504) is in an "L"-shaped structure as a whole; the vertical rod of the transmission rod (504) is close to the shaft position of the rotating wheel (3).

4. A butterfly valve stem assembly according to claim 1, characterized in that: The outer wall of the movable rod (502) is in a T-shaped structure as a whole, and the inner cavity of the guide groove (507) is consistent with the outer wall of the movable rod (502).

5. A butterfly valve stem assembly according to claim 1, characterized in that: The number of the movable rod (502), the spring (503), and the guide groove (507) is three, and the three movable rods (502), the spring (503), and the guide groove (507) are evenly distributed in the inner cavity of the rotating wheel (3).

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