Combined butterfly valve

Abstract

The utility model discloses a combined type butterfly valve, which relates to the technical field of combined type butterfly valves and comprises a pipeline, a butterfly valve rod is rotatably connected in the pipeline, a butterfly valve plate is fixed on the outer wall of the butterfly valve rod, a rotary valve rod is rotatably connected in an inner cavity of the butterfly valve plate, and the rotary valve rod is fixed on the pipeline. A rotary valve plate is arranged at the top end of the rotary valve rod and located in an inner cavity of the butterfly valve plate, and the limiting mechanism is arranged on the rotary valve rod and used for providing limiting for connection of the rotary valve plate and the rotary valve rod. Through the arrangement of the limiting mechanism, the butterfly valve plate and the rotary valve plate can be rapidly spliced and installed, the rotary valve plate and the butterfly valve plate can be separated, the rotary valve plate can be conveniently maintained and repaired, or the rotary valve plate can be conveniently replaced, and the metering speed can be adjusted. By means of the structure, the valve plate of the rotary valve can be replaced and installed conveniently, and the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combined butterfly valves, in particular to a combined butterfly valve. 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 on-off control of low-pressure pipeline media. A butterfly valve refers to a valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] The rotary valve plays an important role in powder control and metering. In the process of powder conveying, the rotary valve can realize quantitative or continuous control of powder as needed. By adjusting the rotation speed and direction of the rotary valve, the flow rate and speed of the powder can be accurately controlled to meet different production requirements. The combination valve combines the butterfly valve with the rotary valve to meter the fluid passing through. The existing butterfly valve generally fixes the rotary valve in the middle of the butterfly valve plate by threads. The butterfly valve plate and the rotary valve do not interfere with each other, and the rotary valve can rotate freely. In order to facilitate the combined connection of the rotary valve and the butterfly valve, the utility model proposes a combined butterfly valve. Utility Model Content

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

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined butterfly valve, comprising a pipeline, the interior of the pipeline is rotatably connected with a butterfly valve stem, the outer wall of the butterfly valve stem is fixed with a butterfly valve plate, the inner cavity of the butterfly valve plate is rotatably connected with a rotary valve stem, the top end of the rotary valve stem is located in the inner cavity of the butterfly valve plate and is provided with a rotary valve plate, and a limiting mechanism is provided on the rotary valve stem, the limiting mechanism is used to provide a limit for the connection between the rotary valve plate and the rotary valve stem;

[0006] The limiting mechanism includes a transmission unit and a guide unit;

[0007] The transmission unit is used to provide a limit for the connection between the rotary valve plate and the rotary valve stem;

[0008] The guide unit is used to provide a moving track for the movement of the positioning block.

[0009] As a further solution of the utility model: the transmission unit includes a movable rod, a limit block, a spring, a connecting rod, a push rod, and a positioning block;

[0010] The movable rod is vertically slidably installed in the inner cavity of the valve stem of the rotary valve, and the movable rod is used to drive the connecting rod to move synchronously;

[0011] The limit block is fixed in the inner cavity of the rotary valve plate, and the movable rod is used to cooperate with the positioning block to connect the rotary valve plate and the rotary valve stem;

[0012] The two ends of the spring are respectively clamped on the top of the movable rod and the inner cavity of the valve stem of the rotary valve, and the spring is used to always provide downward elastic force for the movable rod;

[0013] The connecting rod is fixed to the outer wall of the movable rod, and the connecting rod is used to drive the push rod to move synchronously;

[0014] The push rod is fixed on the top end of the connecting rod, and the push rod is used to push the positioning block to move axially;

[0015] The positioning block is slidably mounted in the inner cavity of the rotary valve stem and extends to the outside of the rotary valve stem. The positioning block is used to be clamped above the limit block to provide a limit for the connection between the rotary valve plate and the rotary valve stem.

[0016] As a further solution of the utility model: the guide unit includes a first guide groove and a second guide groove;

[0017] The first guide groove is formed on the outer wall of the positioning block, and the first guide groove is used to provide movement guidance for the moving push rod;

[0018] The second guide groove is formed on the inner wall of the valve stem of the rotary valve, and the second guide groove is used to provide movement guidance for the moving positioning block.

[0019] As a further solution of the utility model: a protrusion extending to the inner wall of the valve plate of the rotary valve is fixed to the top end of the valve stem of the rotary valve, and the outer wall diameter of the protrusion is smaller than the outer wall diameter of the valve stem of the rotary valve.

[0020] As a further solution of the utility model: a sealing gasket is arranged at the corner where the top end of the rotary valve stem is connected to the protrusion, and the outer wall diameter of the protrusion is smaller than the inner diameter of the bottom docking groove of the rotary valve plate.

[0021] As a further solution of the utility model: the outer wall of the second guide groove is in an inclined state, and the outer wall of the positioning block is formed with a sliding block that enters the inner cavity of the second guide groove.

[0022] As a further solution of the utility model: the inner cavity of the protruding portion at the top end of the valve stem of the rotary valve is formed with a slide groove for the vertical sliding of the positioning block, and the outer wall of one end of the positioning block is in an inclined state.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] By setting a limiting mechanism, the butterfly valve plate and the rotary valve plate can be quickly spliced ​​and installed, and the rotary valve plate and the butterfly valve plate can be separated, which is convenient for maintenance and repair of the rotary valve plate, or replacement of the rotary valve plate and adjustment of the metering speed. Compared with traditional threaded connections, this structure facilitates replacement and installation of the rotary valve plate, further improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the explosion structure of the rotary valve and butterfly valve plate of the utility model;

[0027] Figure 3 This is a cross-sectional view of the internal structure of the rotary valve of the utility model;

[0028] Figure 4 It is a partial enlarged view of point A of the present utility model.

[0029] In the figure: 1, pipeline; 2, butterfly valve stem; 3, butterfly valve plate; 4, rotary valve plate; 5, rotary valve stem; 6, limit mechanism; 601, movable rod; 602, limit block; 603, spring; 604, connecting rod; 605, push rod; 606, positioning block; 607, first guide groove; 608, second guide groove. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-Figure 4 In the embodiment of the utility model, a combined butterfly valve comprises a pipeline 1, a butterfly valve stem 2 is rotatably connected inside the pipeline 1, a butterfly valve plate 3 is fixed to the outer wall of the butterfly valve stem 2, a rotary valve stem 5 is rotatably connected to the inner cavity of the butterfly valve plate 3, a rotary valve plate 4 is arranged at the top end of the rotary valve stem 5 located in the inner cavity of the butterfly valve plate 3, and a limiting mechanism 6 is arranged on the rotary valve stem 5, and the limiting mechanism 6 is used to provide a limit for the connection between the rotary valve plate 4 and the rotary valve stem 5;

[0032] The limiting mechanism 6 includes a transmission unit and a guide unit;

[0033] The transmission unit is used to provide a limit for the connection between the rotary valve plate 4 and the rotary valve stem 5;

[0034] The guide unit is used to provide a movement track for the movement of the positioning block 606;

[0035] The transmission unit includes a movable rod 601, a limit block 602, a spring 603, a connecting rod 604, a push rod 605, and a positioning block 606;

[0036] The movable rod 601 is vertically slidably installed in the inner cavity of the rotary valve stem 5, and the movable rod 601 is used to drive the connecting rod 604 to move synchronously;

[0037] The limit block 602 is fixed in the inner cavity of the rotary valve plate 4, and the movable rod 601 is used to cooperate with the positioning block 606 to connect the rotary valve plate 4 and the rotary valve stem 5;

[0038] The two ends of the spring 603 are respectively clamped on the top of the movable rod 601 and the inner cavity of the rotary valve stem 5, and the spring 603 is used to always provide a downward elastic force for the movable rod 601;

[0039] The connecting rod 604 is fixed to the outer wall of the movable rod 601, and the connecting rod 604 is used to drive the push rod 605 to move synchronously;

[0040] The push rod 605 is fixed on the top end of the connecting rod 604, and the push rod 605 is used to push the positioning block 606 to move axially;

[0041] The positioning block 606 is slidably installed in the inner cavity of the rotary valve stem 5 and extends to the outside of the rotary valve stem 5. The positioning block 606 is used to be stuck above the limit block 602 to provide a limit for the connection between the rotary valve plate 4 and the rotary valve stem 5;

[0042] The guide unit includes a first guide groove 607 and a second guide groove 608;

[0043] The first guide groove 607 is formed on the outer wall of the positioning block 606, and the first guide groove 607 is used to provide movement guidance for the moving push rod 605;

[0044] The second guide groove 608 is formed on the inner wall of the rotary valve stem 5, and the second guide groove 608 is used to provide a moving guide for the moving positioning block 606;

[0045] A protrusion extending to the inner wall of the rotary valve plate 4 is fixed to the top of the rotary valve stem 5, and the outer wall diameter of the protrusion is smaller than the outer wall diameter of the rotary valve stem 5;

[0046] A sealing gasket is arranged at the corner where the top end of the rotary valve stem 5 is connected to the protruding portion, and the outer wall diameter of the protruding portion is smaller than the inner diameter of the bottom docking groove of the rotary valve plate 4 .

[0047] When the movable rod 601 is used, the movable rod 601 moves upward and the spring 603 is given an extrusion force, and the connecting rod 604 is driven to move upward. The connecting rod 604 moving upward will synchronously drive the push rod 605 to move upward. The push rod 605 moves upward and transmits the thrust to the positioning block 606 slidably connected thereto. The positioning block 606 moves upward under the force, and the end of the push rod 605 will also move axially along the direction of the first guide groove 607, and the positioning block 606 will move obliquely along the direction of the second guide groove 608, so that the positioning block 606 gradually moves toward the inside of the rotary valve stem 5 during the upward movement, so that the positioning block 606 no longer rests on the top outer wall of the limit block 602. At this time, the rotary valve stem 5 can be given a downward pulling force, so that the rotary valve stem 5 is separated from the inner cavity of the rotary valve plate 4, and the rotary valve stem 5 and the rotary valve plate 4 are separated, which is convenient for replacing and maintaining the rotary valve plate 4, and convenient for quickly removing the rotary valve plate 4, thereby further improving the working efficiency.

[0048] Please refer to Figure 1-Figure 4 The outer wall of the second guide groove 608 is inclined, the outer wall of the positioning block 606 is formed with a slider that enters the inner cavity of the second guide groove 608, the inner cavity of the top protruding portion of the rotary valve stem 5 is formed with a slide groove for the positioning block 606 to slide vertically, and the outer wall of one end of the positioning block 606 is inclined.

[0049] In this embodiment: through this structure, during the docking process of the rotary valve stem 5 and the rotary valve plate 4, when the positioning block 606 enters the inner cavity of the rotary valve plate 4, the inclined outer wall of the positioning block 606 will contact the bottom end of the limit block 602. After the contact, the positioning block 606 will be forced to enter the interior of the rotary valve stem 5 under the action of the inclined outer wall until the positioning block 606 passes over the limit block 602. At this time, the positioning block 606 will also move out under the elastic force of the spring 603, and the bottom end of the positioning block 606 will abut against the top outer wall of the limit block 602. The spring 603 continuously applies a downward squeezing force to the rotary valve plate 4, so that the rotary valve plate 4 is tightly attached to the top of the rotary valve stem 5, thereby increasing the sealing performance of the rotary valve plate 4 and the rotary valve stem 5.

[0050] 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 combined butterfly valve, comprising a pipeline (1), wherein a butterfly valve stem (2) is rotatably connected to the interior of the pipeline (1), a butterfly valve plate (3) is fixed to the outer wall of the butterfly valve stem (2), a rotary valve stem (5) is rotatably connected to the inner cavity of the butterfly valve plate (3), a rotary valve plate (4) is provided at the top end of the rotary valve stem (5) located in the inner cavity of the butterfly valve plate (3), and characterized in that: A limiting mechanism (6) is arranged on the rotary valve stem (5), and the limiting mechanism (6) is used to provide limiting for the connection between the rotary valve plate (4) and the rotary valve stem (5); The limiting mechanism (6) comprises a transmission unit and a guide unit; The transmission unit is used to provide a limit for the connection between the rotary valve plate (4) and the rotary valve stem (5); The guide unit is used to provide a movement track for the movement of the positioning block (606).

2. A combined butterfly valve according to claim 1, characterized in that: The transmission unit comprises a movable rod (601), a limit block (602), a spring (603), a connecting rod (604), a push rod (605), and a positioning block (606); The movable rod (601) is vertically slidably mounted in the inner cavity of the rotary valve stem (5), and the movable rod (601) is used to drive the connecting rod (604) to move synchronously; The limit block (602) is fixed to the inner cavity of the rotary valve plate (4), and the movable rod (601) is used to cooperate with the positioning block (606) to connect the rotary valve plate (4) and the rotary valve stem (5); The two ends of the spring (603) are respectively clamped on the top of the movable rod (601) and the inner cavity of the rotary valve stem (5), and the spring (603) is used to always provide a downward elastic force for the movable rod (601); The connecting rod (604) is fixed to the outer wall of the movable rod (601), and the connecting rod (604) is used to drive the push rod (605) to move synchronously; The push rod (605) is fixed on the top end of the connecting rod (604), and the push rod (605) is used to push the positioning block (606) to move axially; The positioning block (606) is slidably mounted in the inner cavity of the rotary valve stem (5) and extends to the outside of the rotary valve stem (5); the positioning block (606) is used to be clamped above the limit block (602) to provide a limit for the connection between the rotary valve plate (4) and the rotary valve stem (5).

3. A combined butterfly valve according to claim 2, characterized in that: The guide unit comprises a first guide groove (607) and a second guide groove (608); The first guide groove (607) is formed on the outer wall of the positioning block (606), and the first guide groove (607) is used to provide movement guidance for the moving push rod (605); The second guide groove (608) is formed on the inner wall of the valve stem (5) of the rotary valve, and the second guide groove (608) is used to provide movement guidance for the moving positioning block (606).

4. A combined butterfly valve according to claim 1, characterized in that: A protrusion extending to the inner wall of the rotary valve plate (4) is fixed to the top end of the rotary valve stem (5); the outer wall diameter of the protrusion is smaller than the outer wall diameter of the rotary valve stem (5).

5. A combined butterfly valve according to claim 1, characterized in that: A sealing gasket is provided at the corner where the top end of the rotary valve stem (5) is connected to the protruding portion, and the outer wall diameter of the protruding portion is smaller than the inner diameter of the bottom docking groove of the rotary valve plate (4).

6. A combined butterfly valve according to claim 3, characterized in that: The outer wall of the second guide groove (608) is in an inclined state, and the outer wall of the positioning block (606) is formed with a sliding block that enters the inner cavity of the second guide groove (608).

7. A combined butterfly valve according to claim 2, characterized in that: A sliding groove for the vertical sliding of the positioning block (606) is formed in the inner cavity of the protruding portion at the top end of the rotary valve stem (5); the outer wall of one end of the positioning block (606) is in an inclined state.

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