Double-opening valve structure with self-locking function

Abstract

The present invention discloses a double-opening valve structure with a self-locking function, which includes a valve body, at least two valve flaps, at least two connecting rods and a rotary disk. The valve body is provided with two valve openings, and each valve flap is pivotally connected to the valve body through a first pivot shaft. The rotary disk is arranged between the two valve flaps, the valve flap and the first end of the connecting rod are pivotally connected through a second pivot shaft, and the second end of the connecting rod is pivotally connected to the rotary disk through a third pivot shaft. The axes of the two third pivot shafts are symmetrically distributed about the axis of the rotary disk. When the valve flap covers the valve opening, the projection points of the axis of the second pivot shaft, the projection point of the axis of the third pivot shaft and the projection point of the axis of the rotary disk are distributed in a triangular structure, and during the process of the valve flap approaching the valve opening, the projection point of the axis of the third pivot shaft crosses the connection line between the projection point of the axis of the second pivot shaft and the projection point of the axis of the third pivot shaft once. It avoids the dynamic shaft of the rotary disk from bearing long-term radial force.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a double-opening valve structure with a self-locking function. Background Art

[0002] The discharging valve structure of the existing double-shaft mixing equipment generally has one power source (usually a telescopic cylinder) to control one valve, and relies on the thrust generated by the cylinder to maintain the sealing of the valve. Although, in the prior art, a power mechanism for opening and closing a valve disclosed in a patent document with the patent publication number CN2753935Y utilizes the mechanical self-locking principle to realize the closing of the valve flap. That is, it drives a crank through a rotating shaft (the power source is drivingly connected to the rotating shaft). When each pivot point is collinear, essentially, the extrusion force of the material on the valve flap is converted into the radial extrusion force on the rotating shaft, thereby realizing the dead-point locking to ensure that the valve flap reliably seals the valve port. Obviously, this traditional dead-point locking method causes the rotating shaft to bear the gravity of the material for a long time, thus resulting in easy damage to the rotating shaft. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a double-opening valve structure with a self-locking function, which can not only make the valve flap reliably seal the valve port, but also avoid the rotating shaft from bearing long-term radial force to extend the service life of the rotating shaft.

[0004] The purpose of the present invention is achieved by adopting the following technical solutions:

[0005] A double-opening valve structure with a self-locking function includes a valve body, at least two valve flaps, at least two connecting rods, and a rotating disk; the valve body is provided with two valve ports, and each valve flap is respectively pivotally connected to the valve body through one of the first pivot shafts, so that the valve flap can swing around the first pivot shaft in contact with itself to cover or open one of the corresponding valve ports; the rotating disk is arranged between the two valve flaps, the first end of one of the connecting rods is pivotally connected to the valve flap through a second pivot shaft, and the second end of the connecting rod is pivotally connected to the rotating disk through a third pivot shaft; the axes of the two third pivot shafts are symmetrically distributed about the axis of the rotating disk;

[0006] Wherein, after the valve flap covers the valve port, the projection points of the axis of the second pivot shaft, the projection points of the axis of the third pivot shaft, and the projection points of the axis of the rotating disk are collinearly distributed;

[0007] Alternatively, after the valve flap covers the valve port, the projection points of the axes of the second pivot shaft, the third pivot shaft, and the axis of the rotary disc are distributed in a triangular structure, and during the process of the valve flap approaching the valve port, the projection point of the axis of the third pivot shaft crosses the line connecting the projection points of the axes of the second pivot shaft and the third pivot shaft once.

[0008] Further, the extension trajectory of the connecting rod is in an arc structure.

[0009] Further, the rotary disc is connected with a rotational power source.

[0010] Further, the axis of the valve port is parallel to the plumb line.

[0011] Further, multiple layers of steps are provided at the valve port, and each layer of the steps is arranged at intervals along the axial direction of the valve port. The center lines of the steps are collinear with the center line of the valve port, and the inner edges of each step are all corner structures; the valve flap has an elastic sealing layer extending along its circumferential direction, and the corner structures of each layer of the steps are in extrusion connection with the elastic sealing layer in a separable manner.

[0012] Further, the side surface of the elastic sealing layer for extrusion connection with the corner structure is a wedge surface.

[0013] Further, the valve port is in a circular structure, and the steps are in an annular structure.

[0014] Further, the valve flap includes a rigid main body and the elastic sealing layer. The rigid main body has an annular accommodating groove extending circumferentially around the valve flap, and the elastic sealing layer is embedded in the annular accommodating groove.

[0015] Further, the rigid main body includes a first circular flat plate, an annular plate, and a second circular flat plate that are fixedly connected in sequence along the axial direction of the valve flap and are coaxially arranged. The diameter of the annular plate is smaller than that of the first circular flat plate, and the diameter of the first circular flat plate is smaller than that of the second circular flat plate; one end edge of the elastic sealing layer is connected to the edge of the first circular flat plate, and the other end edge of the elastic sealing layer is connected to the edge of the second circular flat plate.

[0016] Further, the elastic sealing layer is made of rubber material.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] By providing at least two valve openings in the valve body and pivotally connecting two valve flaps to the valve body through one of the first pivot shafts respectively, so that the valve flaps can swing around the first pivot shaft in contact with themselves to cover or open one of the corresponding valve openings; and it is required that after the valve flaps cover the valve openings, the projection points of the axes of the second pivot shaft, the projection points of the axes of the third pivot shaft and the projection points of the axis of the rotary disk are collinearly distributed (i.e., located at the dead point), or the projection points of the axes of the third pivot shaft cross the dead point position; thus, mechanical interlocking is achieved when the two valve flaps are in the state of closing the valve openings, so that not only can the valve flaps reliably block the valve openings, but also the power shaft of the rotary disk is prevented from bearing radial force for a long time, thereby extending the service life of the power shaft of the rotary disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic structural diagram of the double-opening valve structure with a self-locking function according to the present invention; this is the situation after the valve flaps cover the valve openings;

[0020] Figure 2 is Figure 1 a partial schematic diagram, where the dotted line is the conduction direction of the acting force, the dash-dotted line is the auxiliary line, that is, the connection line between the projection point of the axis of the second pivot shaft and the projection point of the axis of the rotary disk; among them, the arc arrow is the valve opening direction, and vice versa is the valve closing direction;

[0021] Figure 3 is Figure 1 a schematic structural diagram of the double-opening valve structure with a self-locking function according to the present invention; this is the situation after the valve flaps are opened;

[0022] Figure 4 is Figure 1 a schematic connection structure diagram of the valve opening and the valve flap.

[0023] In the figure: 1, valve body; 11, valve opening; 111, step; 1111, corner structure; 2, valve flap; 21, elastic sealing layer; 211, wedge surface; 22, rigid main body; 221, annular accommodating groove; 222, first circular flat plate; 223, annular plate; 224, second circular flat plate; 3, connecting rod; 4, rotary disk; 5, first pivot shaft; 6, second pivot shaft; 7, third pivot shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, in combination with the drawings and the specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be combined arbitrarily to form new embodiments.

[0025] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] See Figures 1-4 , the double-opening valve structure with a self-locking function according to a preferred embodiment of the present invention includes: a valve body 1, at least two valve flaps 2, at least two connecting rods 3 and a rotary disk 4. The valve body 1 is provided with two valve openings 11, and each valve flap 2 is pivotally connected to the valve body 1 through one of the first pivot shafts 5, so that the valve flap 2 can swing around the first pivot shaft 5 in contact with itself to cover or open one of the corresponding valve openings 11. The rotary disk 4 is arranged between the two valve flaps 2. The valve flap 2 is pivotally connected to the first end of one of the connecting rods 3 through a second pivot shaft 6, and the second end of the connecting rod 3 is pivotally connected to the rotary disk 4 through a third pivot shaft 7; the axes of the two third pivot shafts 7 are symmetrically distributed about the axis of the rotary disk 4.

[0028] Wherein, when the valve flap 2 covers the valve opening 11, the projection points of the axis of the second pivot shaft 6, the projection points of the axis of the third pivot shaft 7 and the projection points of the axis of the rotary disk 4 are collinearly distributed. This is the first setting method.

[0029] Immediately afterwards, the above-mentioned first setting method is interpreted: at this time, the projection point of the third pivot shaft 7 is located on the line connecting the projection point of the axis of the second pivot shaft 6 and the projection point of the axis of the rotary disk 4, that is, the third pivot shaft 7 is located at the dead center position; at this dead center position, the gravity of the material acting on the valve flap 2 acts on the radial direction of the second pivot shaft 6, and the acting force vector falls on the line connecting the projection point of the axis of the second pivot shaft 6 and the projection point of the axis of the rotary disk 4 and acts on the rotary disk 4. Thus, theoretically, the acting force of the material borne by the valve flap 2 is transferred to the radial direction of the rotary disk 4 and passes through the axis of the rotary disk 4, so the resistance is infinite. But the ingenious part is, for example: See Figure 1, based on the fact that the two valve flaps 2 have covered the valve opening 11 at this time, that is, the resistance of the valve opening 11 to the valve flap 2 is infinite. Therefore, when the third pivot shaft 7 on the left is subjected to a large radial extrusion pressure, its extrusion force is transmitted to the other third pivot shaft 7 through the turntable 4, and then transmitted to the right valve flap 2 through the right connecting rod 3. In view of the infinite resistance of the right valve flap 2, the left valve flap 2 can be prevented from opening, that is, the two valve flaps 2 are linked and interlocked, without the need to rely on the power shaft of the turntable 4 for self-locking, so that no large and long-term radial extrusion pressure will be generated on the power shaft of the turntable.

[0030] Alternatively, as an alternative self-locking method: after the valve flap 2 covers the valve port 11, the projection points of the axis of the second pivot shaft 6, the projection points of the axis of the third pivot shaft 7 and the projection points of the axis of the rotating disk 4 are distributed in a triangular structure, and in the process of the valve flap 2 approaching the valve port 11, the projection point of the axis of the third pivot shaft 7 crosses the line between the projection points of the axis of the second pivot shaft 6 and the projection points of the axis of the third pivot shaft 7 once; this is the second setting method. See Figure 1 and Figure 2 Obviously, in the second setting mode, the projection point of the axis of the third pivot shaft 7 slightly passes the dead point, so that the squeezing force of the left connecting rod 3 on the rotating disk 4 will not pass through the power shaft of the rotating disk 4, but force the rotating disk 4 to have a counterclockwise (i.e., valve closing) movement drive. Since the right valve flap 2 has already covered the valve port 11 at this time, that is, the resistance of the right valve flap 2 is infinite, it can no longer force the rotating disk 4 to continue to rotate counterclockwise, so the two valve flaps 2 are more reliably interlocked. Compared with the traditional dead point self-locking, this interlocking method is more reliable and does not need to be restrained by the power shaft of the rotating disk 4. That is to say, even if the stopping resistance of the power shaft of the rotating disk 4 is completely removed at this time, the problem of the rotating disk 4 rotating clockwise due to a slight collision will basically not occur. Specifically, based on the process that the third pivot axis 7 on the left (the same applies to the third pivot axis 7 on the right) passes through the dead point and moves slightly downward, the valve flap 2 needs to slightly squeeze the valve port 11 for compensation, so that the third pivot axis 7 on the left can enter a situation where it is difficult to reverse unexpectedly; obviously, when it is necessary to drive the turntable 4 to rotate clockwise (i.e., rotate in the valve opening direction), the turntable 4 can be driven clockwise to pass the dead point by the rotating power source.

[0031] Obviously, by opening at least two valve openings 11 in the valve body 1 and pivotally connecting two valve flaps 2 to the valve body 1 through one of the first pivot shafts 5 respectively, the valve flaps 2 can swing around the first pivot shaft 5 in contact with themselves to cover or open one of the corresponding valve openings 11; and it is required that after the valve flap 2 covers the valve opening 11, the projection points of the axis of the second pivot shaft 6, the projection points of the axis of the third pivot shaft 7 and the projection points of the axis of the rotary disk 4 are collinearly distributed (i.e., located at the dead point), or the projection points of the axis of the third pivot shaft 7 cross the dead point position; thus, the two valve flaps 2 are mechanically interlocked in the state of closing the valve openings 11, so that not only can the valve flap 2 reliably block the valve opening 11, but also the power shaft of the rotary disk 4 is prevented from bearing radial force for a long time, so as to extend the service life of the power shaft of the rotary disk 4.

[0032] Here, it should be supplemented that the understanding of the double-opening valve structure is that the rotary disk 4 is arranged between two or more valve flaps 2, and all the valve flaps 2 on the opposite sides of the rotary disk 4 are opened synchronously. That is to say, in Figure 1 when there are four valve flaps 2, there are two on each side of the rotary disk 4. The four valve flaps 2 correspond to the four valve openings 11 one by one, and the projections of the two valve flaps 2 on the left side of the rotary disk 4 coincide, and the projections of the two valve flaps 2 on the right side of the rotary disk 4 coincide.

[0033] Preferably, the rotary disk 4 is connected with a rotational power source. It can be understood that as an alternative setting method, in the working principle of the double-opening valve structure with self-locking function, it is allowed not to set a rotational power source, that is, it can be operated manually by workers.

[0034] Preferably, the extending trajectory of the connecting rod 3 is an arc-shaped structure. With this setting, when the connecting rod 3 bears a large axial pressure, it has a certain margin for bending deformation compensation, which is also beneficial to ensuring that the rotational power source drives the rotary disk 4 to cross the dead point clockwise to complete the opening of the valve.

[0035] Preferably, the axis of the valve opening 11 is parallel to the plumb line. With this setting, Figure 1 in which the rotary disk 4 controls the opening and closing of two valves at the same time, and the gravity direction of the material is the discharging direction, so as to improve the discharging efficiency.

[0036] See Figure 4, preferably, there are multiple layers of steps 111 provided at the valve port 11, and each layer of steps 111 is arranged at intervals along the axial direction of the valve port 11. The center lines of the steps 111 are collinear with the center line of the valve port 11, and the inner edges of each step 111 are all corner structures 1111; the valve flap 2 has an elastic sealing layer 21 extending along its circumferential direction, and the corner structures 1111 of each layer of steps 111 are all in a squeezable connection with the elastic sealing layer 21 that can be separated from each other. Based on the fact that each layer of steps 111 is arranged at intervals along the axial direction of the valve port 11, the steps 111 are thus in a stepped structure, so that the multiple layers of steps 111 can be in contact with the elastic sealing layer 21 of the valve simultaneously to achieve a sealed connection. Importantly, based on the fact that the inner edges of each step 111 are all corner structures 1111, that is, a sealing method with a small area and a large pressure is achieved between the corner structure 1111 and the elastic sealing layer 21 of the valve flap 2, thereby improving the sealing performance; moreover, the contact area of the corner structure 1111 is small, and the area of the elastic sealing layer 21 is relatively large, making it easier for the elastic sealing layer 21 to align and cooperate with the corner structure 1111. Moreover, based on the fact that it is difficult for the corner structure 1111 to accumulate residues, and the elastic sealing layer 21 will continue to move to a certain extent at the moment of squeezing the corner structure 1111, thus the trace residues can be scraped off or rubbed off.

[0037] See Figure 4 , preferably, the side surface of the elastic sealing layer 21 for squeezing and connecting with the corner structure 1111 is a wedge-shaped surface 211. With this setting, that is, the side surface of the elastic sealing layer 21 for squeezing and connecting with the corner structure 1111 is an inclined surface or an arc-shaped surface, so that the shape of the elastic sealing layer 21 is more adapted to the multiple layers of steps 111.

[0038] See Figure 4 , more preferably, in order to make the seal between the elastic sealing layer 21 and the corner structure 1111 more tight, the valve port 11 is in a circular structure, and the steps 111 are in an annular structure. It can be understood that as an alternative setting method, the valve port 11 can be in a rectangular structure, and at this time the steps 111 are also in a ring-shaped rectangular structure. Or, the valve port 11 is in an oval structure, and at this time the steps 111 are in a ring-shaped oval structure.

[0039] See Figure 4 , preferably, the valve flap 2 includes a rigid main body 22 and an elastic sealing layer 21. The rigid main body 22 has an annular accommodation groove 221 extending circumferentially around the valve flap 2, and the elastic sealing layer 21 is embedded in the annular accommodation groove 221. With this setting, the rigid main body 22 can ensure that the entire valve flap 2 can reliably close the valve, and the elastic sealing layer 21 is restricted by the rigid main body 22, so that it can be reliably linked and squeeze each step 111, so that the valve flap 2 can also maintain its original state and reliably cover the valve port 11 when encountering a large resistance. It can be understood that as an alternative setting method, the entire valve flap 2 can be made of an elastic material.

[0040] See Figure 4 , preferably, the rigid body 22 includes a first circular flat plate 222, an annular plate 223, and a second circular flat plate 224 that are fixedly connected in sequence along the axial direction of the valve flap 2 and are coaxially arranged. The diameter of the annular plate 223 is smaller than the diameter of the first circular flat plate 222, and the diameter of the first circular flat plate 222 is smaller than the diameter of the second circular flat plate 224; one end edge of the elastic sealing layer 21 is connected to the edge of the first circular flat plate 222, and the other end edge of the elastic sealing layer 21 is connected to the edge of the second circular flat plate 224. With this arrangement, the connection between the elastic sealing layer 21 and the first circular flat plate 222 is smoother, and the connection between the elastic sealing layer 21 and the second circular flat plate 224 is also smoother, thereby preventing material accumulation.

[0041] Preferably, the elastic sealing layer 21 is made of rubber material. Of course, the elastic sealing layer 21 can also be made of elastic polymer materials, etc.

[0042] The above embodiments are only the preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. The double-opening valve structure with a self-locking function is characterized in that: It includes a valve body (1), at least two valve flaps (2), at least two connecting rods (3) and a rotating disc (4); the valve body (1) is provided with two valve ports (11), and each of the valve flaps (2) is pivotally connected to the valve body (1) through one of the first pivot shafts (5), so that the valve flap (2) can swing around the first pivot shaft (5) in contact with itself to cover or open one of the corresponding valve ports (11); the rotating disc (4) is arranged between the two valve flaps (2), the first end of the valve flap (2) and one of the connecting rods (3) are pivotally connected through a second pivot shaft (6), and the second end of the connecting rod (3) is pivotally connected to the rotating disc (4) through a third pivot shaft (7); the axes of the two third pivot shafts (7) are symmetrically distributed about the axis of the rotating disc (4). Wherein, when the valve flap (2) covers the valve port (11), the projection points of the axis of the second pivot shaft (6), the projection points of the axis of the third pivot shaft (7) and the projection points of the axis of the rotating disc (4) are collinearly distributed. Or, when the valve flap (2) covers the valve port (11), the projection points of the axis of the second pivot shaft (6), the projection points of the axis of the third pivot shaft (7) and the projection points of the axis of the rotating disc (4) are distributed in a triangular structure, and during the process of the valve flap (2) approaching the valve port (11), the projection points of the axis of the third pivot shaft (7) cross the connection line between the projection points of the axis of the second pivot shaft (6) and the projection points of the axis of the rotating disc (4) once.

2. The double-opening valve structure with a self-locking function as described in claim 1, characterized in that: The extension trajectory of the connecting rod (3) is in an arc-like structure.

3. The double-opening valve structure with a self-locking function as described in claim 1, characterized in that: The rotating disc (4) is connected with a rotational power source.

4. The double-opening valve structure with a self-locking function as described in claim 1, characterized in that: The axis of the valve port (11) is parallel to the plumb line.

5. The double-opening valve structure with a self-locking function according to claim 1, characterized in that: Multiple layers of steps (111) are provided at the valve port (11), and each layer of the steps (111) is arranged at intervals along the axial direction of the valve port (11), the center line of the step (111) is collinear with the center line of the valve port (11), and the inner edges of each layer of the steps (111) are all corner structures (1111); the valve flap (2) has an elastic sealing layer (21) extending along its circumferential direction, and the corner structures (1111) of each layer of the steps (111) are squeeze-connected to the elastic sealing layer (21) in a separable manner.

6. The double-opening valve structure with a self-locking function according to claim 5, characterized in that: The side surface of the elastic sealing layer (21) for squeeze-connecting the corner structure (1111) is a wedge surface (211).

7. The double-opening valve structure with a self-locking function as described in claim 5, characterized in that: The valve port (11) is in a circular structure, and the step (111) is in an annular structure.

8. The double-opening valve structure with a self-locking function as described in claim 5, characterized in that: The valve flap (2) includes a rigid main body (22) and the elastic sealing layer (21), the rigid main body (22) has an annular accommodating groove (221) extending along the circumferential direction of the valve flap (2), and the elastic sealing layer (21) is embedded in the annular accommodating groove (221).

9. The double-opening valve structure with a self-locking function as described in claim 8, wherein: The rigid body (22) includes a first circular flat plate (222), an annular plate (223), and a second circular flat plate (224) that are fixedly connected in sequence along the axial direction of the valve flap (2) and are coaxially arranged. The diameter of the annular plate (223) is smaller than the diameter of the first circular flat plate (222), and the diameter of the first circular flat plate (222) is smaller than the diameter of the second circular flat plate (224); one end edge of the elastic sealing layer (21) is joined to the edge of the first circular flat plate (222), and the other end edge of the elastic sealing layer (21) is joined to the edge of the second circular flat plate (224).

10. The double-opening valve structure with a self-locking function according to claim 5, characterized in that: The elastic sealing layer (21) is made of a rubber material.

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