CN204961855U - Zero friction butterfly valve of single pole with guide way - Google Patents

Abstract

The utility model relates to a single-rod zero-friction butterfly valve with a guide groove, comprising a valve body, a guide plate, a valve shaft, a guide shaft, a connecting plate, a disc plate, a linkage rod and a driving motor, and the valve body is a hollow cylinder structure, there is a ring of sealing ring in the circumferential direction of the valve body, one end of the guide plate is fixed on the inner wall of the valve, the other end of the guide plate is provided with a guide groove, the number of the linkage rods is two, and they are respectively arranged at both ends of the guide plate , the valve shaft is a cylindrical structure, the valve shaft passes through the fixed through hole on the guide plate and the linkage rod, the two ends of the valve shaft are fixed on the valve body, the drive motor is fixed on the outer wall of the valve body, and the drive motor rotor and one end of the valve shaft Fixed connection, the main body of the guide shaft passes through the moving through hole on the linkage rod and the guide groove on the guide plate, the fixed terminal is fixed on the connecting plate, the connecting plate is vertically fixed on the disc plate, and the disc plate and The sealing ring is sealed and fit, the structure is simple, and it is wear-resistant, which realizes the zero friction of the butterfly valve and increases the service life.

Description

A Single Rod Zero Friction Butterfly Valve with Guide Groove

technical field

The utility model relates to a single-rod zero-friction butterfly valve with a guide groove, in particular to a hard-sealed butterfly valve without friction.

Background technique

The hard seal butterfly valve usually includes a valve body, a valve stem, a valve plate and a valve seat. The valve plate can rotate in the valve body, and the valve seat is set on the inner circumference of the valve body. The sealing ring on the outer circumference forms a sealing pair. When the valve is closed, the radial compression of the valve plate and the axial thrust of the positive medium make the sealing ring close to the valve seat, elastic deformation occurs, and the sealing specific pressure is generated to realize valve sealing. Seal between plate and valve body. In the prior art, due to structural reasons, the sealing specific pressure between the sealing pairs is fixed. When the valve plate is opened and closed, there is always friction between the sealing pairs, which increases the torque of the opening and closing valve and slows down the opening and closing speed. Frequent opening and closing will easily cause the sealing surface to wear, the sealing performance will decrease, and eventually the valve will leak. Chinese patent 201320032692.9 discloses a fork-type butterfly valve with a guide groove. The fork-type butterfly valve with a guide groove has a valve body, a valve body sealing seat in the valve body, and a disc plate that matches the valve body sealing seat. The side wall of the valve body is pierced with a valve shaft, and a fork-type transmission mechanism is connected between the valve shaft and the disc plate. The fork-type transmission mechanism has a toggle shaft bracket in front of the disc plate and perpendicular to the valve plate. There is a toggle shaft parallel to the valve shaft, and the valve shaft is connected with a shift fork perpendicular to the valve shaft. The wave shaft is inside the shift fork, and there is a limit plate between the valve shaft and the front of the butterfly plate. Connected to the front of the butterfly plate, there is a long hole on the limit plate, the valve shaft is in the long hole, and the limit plate has an arc-shaped limit hole whose center is in the axial direction of the valve shaft. One end is connected with a strip-shaped limiting hole perpendicular to the butterfly plate, and the inner circumference of the valve is positioned with a limiting pin perpendicular to the limiting plate, and one end of the limiting pin is inserted into the limiting hole. This structure realizes that the butterfly plate and the sealing seat of the valve body are separated first and then opened, thereby realizing zero friction between the sealing seat of the valve body and the butterfly plate. But because this motion is to realize by force-moving in the limit hole by limit pin so limit pin is easy to be worn. At the same time, the limit pin will be subjected to a large force during the opening process of the butterfly plate and in the open state, which will easily break the limit pin.

Utility model content

In order to solve the deficiencies of the prior art, the utility model proposes a single-rod zero-friction butterfly valve with a guide groove, which is simple in structure and wear-resistant, realizes zero friction of the butterfly valve, and increases the service life.

The utility model is realized by following method:

A single-rod zero-friction butterfly valve with a guide groove, comprising a valve body, a guide plate, a valve shaft, a guide shaft, a connecting plate, a disc plate, a linkage rod and a driving motor, the valve body is a hollow cylindrical structure, and the valve body There is a ring sealing ring in the circumferential direction, one end of the guide plate is fixed on the inner wall of the valve, and the other end of the guide plate is provided with a guide groove, the guide groove includes a horizontal chute and a turning chute that communicate with each other, and the horizontal chute is connected with the inner wall of the valve body. The walls are arranged in parallel, the steering chute is an arc-shaped structure, and the radian of the steering chute is 90°. The number of the linkage rods is two, which are respectively arranged at the two ends of the guide plate. The linkage rods are provided with fixed through holes and moving vias;

The valve shaft is a cylindrical structure, the valve shaft passes through the fixed through hole on the guide plate and the linkage rod, the two ends of the valve shaft are fixed on the valve body, the drive motor is fixed on the outer wall of the valve body, and the drive motor rotor and the valve shaft Fixed connection at one end;

The guide shaft includes a guide shaft main body and fixed terminals arranged at both ends of the guide shaft main body, the guide shaft main body is a cuboid structure, the upper surface of the guide shaft main body is recessed inward to form a first chute, and the lower surface of the guide shaft main body protrudes outward The first protrusion is formed, the cross-sectional shape of the fixed terminal is a rectangular structure, the main body of the guide shaft passes through the moving through hole on the linkage rod and the guide groove on the guide plate, the fixed terminal is fixed on the connecting plate, and the connecting plate is vertical is fixed on the disc plate, and the disc plate is sealed with the sealing ring.

The above-mentioned single-rod zero-friction butterfly valve with a guide groove, wherein the moving through hole is in clearance fit with the main body of the guide shaft.

The above-mentioned single-rod zero-friction butterfly valve with a guide groove, wherein a sealing packing is provided between the valve shaft and the valve body.

The above-mentioned single-rod zero-friction butterfly valve with a guide groove, wherein, the number of the connecting plates is two, which are respectively arranged on both sides of the guide plate.

The above-mentioned single-rod zero-friction butterfly valve with a guide groove, wherein, the linkage rod and the valve shaft are fixed by screws.

The beneficial effects of the utility model are:

There is a valve body sealing seat in the valve body of the utility model, and a butterfly plate matched with the sealing seat is arranged in the valve body. The guide shaft passes through the guide groove, and the guide groove and the guide shaft have a special structure to match, so that the guide shaft can move along the guide groove, and ensure that the guide shaft turns 90 degrees when it reaches the end of the guide groove, and the butterfly plate passes through the connecting rod It is connected with the guide shaft, and the guide shaft at the joint is square, so that the butterfly plate can translate and rotate together with the guide shaft, so as to achieve the result of being separated from the sealing seat and then turned over 90 degrees to open. The utility model has a simple structure and is wear-resistant , Realized the zero friction of the butterfly valve and increased the service life.

Description of drawings

Fig. 1 is a front view of the utility model.

Fig. 2 is a side view of the utility model.

Fig. 3 is the cooperative structural diagram of utility model connecting rod and guide shaft,

Fig. 4 is a matching structure diagram of the guide shaft and the guide groove of the present invention.

detailed description

As shown in the figure, a single-rod zero-friction butterfly valve with a guide groove includes a valve body 1, a guide plate 2, a valve shaft 4, a guide shaft 5, a connecting plate 6, a disc plate 7, a linkage rod 8 and a drive motor 9. The valve body 1 is a hollow cylindrical structure, and a ring sealing ring 10 is arranged in the inner circumference of the valve body 1, and one end of the guide plate 2 is fixed on the inner wall of the valve body 1, and the other end of the guide plate 2 is provided with a guide groove 3. The guide groove 3 includes a horizontal chute 11 and a diverting chute 12 which communicate with each other. The horizontal chute 11 is arranged parallel to the inner wall of the valve body 1. The diverting chute 12 is an arc-shaped structure, and the arc a of the diverting chute 12 is 90°. The number of the linkage rods 8 is two, which are respectively arranged on the two ends of the guide plate 2, and the linkage rods 8 are provided with a fixed through hole 13 and a moving through hole 14;

The valve shaft 4 is a cylindrical structure, the valve shaft 4 passes through the fixed through hole 13 on the guide plate 2 and the linkage rod, the linkage rod 8 and the valve shaft 4 are fixed by screws 15, and the two ends of the valve shaft 4 Fixed on the valve body 1, a sealing packing 16 is provided between the valve shaft 4 and the valve body 1, the drive motor 9 is fixed on the outer wall of the valve body 1, and the rotor 17 of the drive motor 9 is fixedly connected to one end of the valve shaft 4;

The guide shaft 5 includes a guide shaft main body 18 and fixed terminals 19 arranged at both ends of the guide shaft main body. The guide shaft main body 18 is a cuboid structure, and the upper surface of the guide shaft main body 18 is sunken inward to form a first chute 20. The lower surface of the lower surface protrudes outward to form a first protrusion 21, the cross-sectional shape of the fixed terminal 19 is a rectangular structure, the guide shaft main body 18 passes through the moving through hole 14 on the linkage rod and the guide groove 3 on the guide plate, and moves through The hole 14 is in clearance fit with the main body 18 of the guide shaft; the number of the connecting plates 6 is two, which are respectively arranged on both sides of the guide plate 2, and the fixed terminals 19 are fixed on the connecting plates 6, and the connecting plates 6 are vertically fixed on the plate On the plate 7, the disc plate 7 is sealed with the sealing ring 10.

When the butterfly valve of the utility model is in the closed state, as shown in Figure 1, the connecting rod is parallel to the inner wall of the valve, and the movement mode of the disc plate opening process is as follows, the valve shaft 4 is driven by the drive motor to rotate and drive the linkage rod 8 counterclockwise Rotate, the linkage rod 8 is matched with the guide shaft and has a clearance fit with the guide shaft, and the linkage rod 8 rotates counterclockwise to drive the guide shaft 5 to move to the right. Since there is a special structure between the guide shaft 5 and the guide groove 3, In this way, the guide shaft can move along the guide groove. The guide groove is a horizontal chute at the beginning, and after a certain distance, it is a turning chute with an arc-shaped groove, so that the guide shaft first moves in parallel, and then makes an arc-shaped movement. At the same time Due to the special cooperation between the guide shaft 5 and the guide groove 3, when the guide shaft moves along the guide groove to the uppermost end of the guide groove, the guide shaft turns 90 degrees, and the link between the guide shaft 5 and the connecting rod 6 is a square structure, and the connection The rod 6 first translates and then rotates following the guide shaft, realizing that the butterfly plate first translates and then turns over 90° to open under the drive of the connecting rod. Also when the valve is closed the movement pattern is opposite to the movement pattern when it is open.

The utility model realizes that the butterfly plate first translates and then flips open, and realizes zero friction of the butterfly valve. Moreover, the internal structure of the valve body is simple and has little influence on the flow rate.

The description and application of the utility model here are illustrative, and are not intended to limit the scope of the utility model to the above-mentioned embodiments. Therefore, the utility model is not limited by this embodiment, and any technical solutions obtained by equivalent replacement All within the protection scope of the utility model.

Claims (5)

1. a single pole zero with guiding groove rubs butterfly valve, it is characterized by, comprise valve body, guide plate, valve shaft, the axis of guide, connecting plate, dish plate, linkage rod and drive motor, described valve body is the cylindrical structure of hollow, valve body inner circumferential is provided with a circle seal ring, described guide plate one end is fixed on valve interior wall, the guide plate the other end is provided with guiding groove, described guiding groove comprises the horizontal concrete chute that is interconnected and turns to chute, horizontal concrete chute and valve interior wall be arranged in parallel, chute is turned to be arc-shaped structure, the radian of chute is turned to be 90 °, the quantity of described linkage rod is two, be separately positioned on the two ends of guide plate, linkage rod is provided with fixed via and mobile through hole,

Described valve shaft is cylindrical structural, and valve shaft is through the fixed via on guide plate and linkage rod, and valve shaft two ends are fixed on valve body, and described drive motor is fixed on valve outer wall, and drive motor rotor is fixedly connected with valve shaft one end;

The described axis of guide comprises axis of guide main body and is arranged on the fixed terminal at axis of guide main body two ends, axis of guide main body is rectangular structure, the upper surface of axis of guide main body caves inward formation first chute, the lower surface of axis of guide main body outwardly forms the first projection, the sectional shape of fixed terminal is rectangular configuration, described axis of guide main body is through the mobile through hole in linkage rod and the guiding groove on guide plate, fixed terminal is fixed on connecting plate, what described connecting plate was vertical is fixed on dish plate, and described dish plate and seal ring are sealed and matched.

2. a kind of single pole zero with guiding groove rubs butterfly valve as claimed in claim 1, and it is characterized by, described mobile through hole coordinates with axis of guide body gap.

3. a kind of single pole zero with guiding groove rubs butterfly valve as claimed in claim 1, it is characterized by, is provided with stuffing box packing between described valve shaft and valve body.

4. a kind of single pole zero with guiding groove rubs butterfly valve as claimed in claim 1, and it is characterized by, the quantity of described connecting plate is two, is separately positioned on guide plate both sides.

5. a kind of single pole zero with guiding groove rubs butterfly valve as claimed in claim 1, it is characterized by, is fixed between described linkage rod and valve shaft by screw.