CN113983180A

CN113983180A - Self-locking mechanism and double-eccentric butterfly valve

Info

Publication number: CN113983180A
Application number: CN202111438363.XA
Authority: CN
Inventors: 生烨慧; 刘运承; 张敬春; 侯彦峥; 吴铁; 吴坤; 李喜明; 刘书秀
Original assignee: Anshan Solenoid Valve Co ltd
Current assignee: Anshan Solenoid Valve Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-01-28

Abstract

The application relates to the technical field of valves, especially, relate to a self-locking mechanism and two eccentric butterfly valves, self-locking mechanism includes: a first locking member provided with a locking portion and an unlocking portion; the locking assembly is arranged at a distance from the first locking member and comprises a fixing part and a second locking member arranged on the fixing part; the second locking component can move relative to the fixed part so as to enable the second locking component to be in fit connection with the locking part or the unlocking part; when the first locking member moves relative to the locking assembly, the second locking member switches between a state of being connected with the locking portion and a state of being connected with the unlocking portion. The self-locking mechanism provided by the application has the advantages of simple structure, easiness in processing, flexible self-locking process, stronger reliability and self-locking precision, and capability of ensuring the stability between components or devices needing to be locked with each other at a locking position or an unlocking position.

Description

Self-locking mechanism and double-eccentric butterfly valve

Technical Field

The application relates to the technical field of valves, in particular to a self-locking mechanism and a double-eccentric butterfly valve.

Background

At present, the existing butterfly valve, for example, a double-eccentric butterfly valve, is influenced by flowing media after the butterfly valve is opened and closed, and a rotary phenomenon often occurs, so that a valve plate cannot be completely sealed, and therefore a corresponding self-locking device needs to be arranged to enable the valve plate to be locked at a corresponding position after the valve plate is opened or closed, and the valve plate is prevented from rotating. The existing double-eccentric butterfly valve is usually locked by using a pneumatic valve, the locking mode is complex in structure, an independent air source needs to be arranged, the error is large, the reliability is low, the valve plate is easy to slightly rotate, and the sealing effect of the valve is influenced.

Disclosure of Invention

An object of this application is to provide a self-locking mechanism and two eccentric butterfly valves to solve the current butterfly valve's that exists among the prior art locking device structure loaded down with trivial details to a certain extent, the error is great moreover, influences the technical problem of valve seal effect easily.

The application provides a self-locking mechanism, includes: a first locking member provided with a lock portion and an unlock portion;

the locking assembly is arranged at a distance from the first locking member and comprises a fixing part and a second locking member arranged on the fixing part;

the second locking member can move relative to the fixed part so as to enable the second locking member to be matched and connected with the locking part or the unlocking part;

when the first locking member moves relative to the locking assembly, the second locking member switches between a state of being connected with the locking portion and a state of being connected with the unlocking portion.

In the above technical solution, further, the first locking member includes:

a body formed with a lock wall surface on which the lock portion and the unlock portion are provided at an interval;

the connecting rod penetrates through the main body and drives the main body to rotate synchronously when rotating;

the connecting rod with the main part passes through the connecting rod is connected.

In any one of the above technical solutions, further, the unlocking portion and the locking portion are arc-shaped grooves formed on the locking wall surface.

In any one of the above technical solutions, further, the main body has a disc structure, and the main body is further formed with a weight-reduced portion.

In any of the above technical solutions, further, the locking assembly includes:

a housing having an accommodating space formed therein; a moving channel is formed at one end of the shell facing the first locking member, and the second locking member is arranged in the moving channel;

the driving assembly is arranged in the accommodating space; the drive assembly acts on the second locking member to cause the second locking member to have a tendency to move towards the first locking member.

In any of the above technical solutions, further, the driving assembly includes:

the elastic piece is arranged in the accommodating space;

a driving member disposed between the elastic piece and the second locking member.

In any of the above technical solutions, further, the driving member includes:

one end of the elastic piece is connected with the shell, and the other end of the elastic piece is connected with the connecting part;

a guide portion to which the connection portion is connected;

an abutment connected to the guide, at least part of the abutment entering the moving channel for contacting or connecting with the second locking member.

In any of the above technical solutions, further, a line between the center of the locking portion and the center of the main body is perpendicular to a line between the center of the unlocking portion and the center of the main body.

The application also provides a double-eccentric butterfly valve, which comprises the self-locking mechanism in any technical scheme, so that the double-eccentric butterfly valve has all beneficial technical effects of the self-locking mechanism, and is not repeated.

In the above technical solution, further, the double eccentric butterfly valve further includes:

the driving device comprises a fixed shell and a driving rod arranged in the fixed shell, the first locking member is connected with the driving rod, and the locking assembly is arranged on the fixed shell;

the driving rod of the driving device is connected with the valve plate, and the driving device is used for driving the valve plate to rotate.

Compared with the prior art, the beneficial effect of this application is:

the application provides a self-locking mechanism includes: a first locking member provided with a locking portion and an unlocking portion; the locking assembly is arranged at a distance from the first locking member and comprises a fixing part and a second locking member arranged on the fixing part; the second locking component can move relative to the fixed part so as to enable the second locking component to be in fit connection with the locking part or the unlocking part; when the first locking member moves relative to the locking assembly, the second locking member switches between a state of being connected with the locking portion and a state of being connected with the unlocking portion.

The self-locking mechanism provided by the application has the advantages of simple structure, easiness in processing, flexible self-locking process, stronger reliability and self-locking precision, and capability of ensuring the stability between components or devices needing to be locked with each other at a locking position or an unlocking position.

The application provides a double eccentric butterfly valve, including the aforesaid self-locking mechanism, therefore, can ensure through this self-locking mechanism and realize the reliability of auto-lock process when being used for double eccentric butterfly valve to have stronger locking precision, thereby avoid when double eccentric butterfly valve is in the closed condition the valve plate to take place slight rotation, influence sealed effect.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a self-locking mechanism provided in an embodiment of the present application;

fig. 2 is a partial schematic structural view of a self-locking mechanism provided in an embodiment of the present application;

fig. 3 is an enlarged schematic structural view of the self-locking mechanism provided in fig. 1 at a.

Reference numerals:

1-a first locking member, 101-a body, 1011-a through channel, 102-a locking part, 103-an unlocking part, 104-a weight-reducing part, 2-a connecting rod, 3-a connecting piece, 4-a second locking member, 5-a housing, 501-a containing space, 502-a moving channel, 503-an installation space, 6-an elastic piece, 7-a driving member, 701-a guiding part, 702-a connecting part, 703-an abutting part, 7031-an arc surface, 8-a fixing member, 801-a fixing seat, 802-a bulge and 9-a fastener.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The self-locking mechanism and the double eccentric butterfly valve according to the embodiment of the present application are described below with reference to fig. 1 to 3.

Referring to fig. 1 to 3, an embodiment of the present application provides a self-locking mechanism including: the locking device comprises a first locking member 1 and a locking assembly, wherein the first locking member 1 is arranged on one of two target members (defined as a first target member) needing to be locked or unlocked mutually, the locking assembly is arranged on the other of the two target members (defined as a second target member) needing to be locked or unlocked mutually, and the first target member and the second target member can be locked or unlocked mutually by mutually locking or unlocking the first locking member 1 and the locking assembly.

Specifically, the first locking member 1 includes a main body 101, the main body 101 has a disk structure, and the disk structure is formed with a locking wall surface, specifically, a portion of the main body 101 facing and capable of covering the locking assembly during rotation, the locking wall surface is formed with an unlocking portion 103 and a locking portion 102 at an interval, specifically, the unlocking portion 103 and the locking portion 102 are arranged at an interval in the direction of rotation of the main body 101, and when the first locking member 1 rotates relative to the locking assembly, a portion of the locking assembly that performs a locking function is capable of switching a position between the unlocking portion 103 and the locking portion 102.

Further, the unlocking portion 103 and the locking portion 102 are both groove structures formed on the locking wall surface of the first locking member 1, and preferably, the unlocking portion 103 and the locking portion 102 are both arc-shaped grooves.

Further, the main body 101 of the first locking member 1 has a cylindrical structure, the inside of the main body 101 is hollow and a through passage 1011 is formed, the through passage 1011 extends in the axial direction of the main body 101, and a locking wall surface is provided on the surface of the cylindrical structure. The portions of the surface of the barrel structure other than the locking wall surface are notched as lightening portions 104 for controlling the weight of the first locking member 1, or the locking wall surface is raised with respect to the surface of the barrel structure, and the portions of the surface of the barrel structure other than the locking wall surface are formed as lightening portions 104, preferably, with one of the diameters of the barrel structure of the main body 101 as a reference line, the locking wall surface and the lightening portions 104 occupy the both sides of the reference line, respectively.

Further, this self-locking mechanism still includes connecting rod 2, and connecting rod 2 wears to establish the passageway 1011 of wearing to establish of main part 101 to connecting rod 2 passes the one end of wearing to establish passageway 1011 and first target component, so that first target component can rotate along with first target component is synchronous.

Preferably, the side wall of the weight-reduced portion 104 of the body 101 is formed with at least one through hole, and the body 101 is coupled to the connecting rod 2 by passing the connecting member 3 through the through hole and coupling to the connecting rod 2, thereby ensuring that the body 101 can be rotated in synchronization with the connecting rod 2, the first target member. The connecting member 3 may be, but is not limited to, a screw.

More preferably, the connecting rod 2 is a square rod, and the wall surface of the connecting rod 2 is arranged to face the through hole, so that a larger facing area is formed between the wall surface of the connecting rod 2 and the through hole, and the connecting strength between the connecting piece 3 and the connecting rod 2 is ensured.

More preferably, the cross section of the through channel 1011 is circular or elliptical, and four limit slots (not shown in the figure) are formed on the inner wall of the through channel 1011, and four edges of the connecting rod 2 are respectively clamped in the four limit slots, so as to ensure that the main body 101 can synchronously rotate along with the connecting rod 2.

The first target member is driven by the external drive to rotate back and forth between the first position and the second position, so that the first target member and the second target member have two relative positions of locking and unlocking with each other.

Further, the locking assembly includes: a housing 5, a second locking member 4 and a drive assembly.

Still further, the drive assembly includes: a spring 6 and a drive member 7.

Specifically, the interior of the housing 5 is hollow to form an accommodating space 501; a first opening is formed at one end of the housing 5, the first opening is disposed toward the locking wall surface of the first locking member 1, the end of the housing 5 away from the first opening is a bottom end, and a moving channel 502 is formed between the first opening of the housing 5 and the accommodating space 501, the diameter of the moving channel 502 is smaller than that of the accommodating space 501, so that the diameter in the direction from the bottom end to the first opening inside the housing 5 is reduced, and a step is formed at the intersection position of the accommodating space 501 and the moving channel 502.

The second locking member 4 is disposed in the moving channel 502, preferably, the second locking member 4 is a ball disposed in the moving channel 502, and more preferably, the diameter of the ball is slightly smaller than the inner diameter of the moving channel 502, so that the ball can not only move in the length direction of the moving channel 502 to approach or separate from the first opening and the locking wall surface opposite to the first opening, but also can rotate when receiving an external force in the moving channel 502.

Preferably, the bottom end of the housing 5 is formed with a second opening, a portion of the inner space of the housing 5 near the bottom end is formed with a mounting space 503, and the diameter of the mounting space 503 is larger than that of the accommodating space 501; the installation space 503 is provided with a fixing member 8, the second opening is blocked by the fixing member 8, and preferably, the side wall of the fixing member 8 is in close contact with the inner wall surface of the housing 5 so that there is a large friction force therebetween and relative rotation does not easily occur.

Further, the fixation member 8 is fixed to the second target member by means of a screw or other form of fastener 9, such that the housing 5 and thus the fixation member 8 can remain stationary with the second target member relative to the first target member while the first locking member 1 rotates with the first target member.

Further, the elastic member 6 is provided in the housing space 501 of the housing 5, and the elastic member 6 is preferably a compression spring, but it is not limited thereto, and may be a structure such as a spring plate that can perform the same function. More preferably, the compression spring is in a compressed state in the accommodating space 501, has a certain elastic potential energy, one end of the compression spring is connected with the fixed member 8, the other end of the compression spring is connected with the driving member 7, and the driving member 7 can abut against the ball, and under the action of the compression spring, the compression spring pushes the driving member 7 to contact the ball all the time and acts on the ball so that the ball always has a tendency to escape from the first opening to the outside of the moving channel 502.

Further, when the first target member is driven to rotate to the first position relative to the second target member by the external force, a part of the second locking member 4 (ball) enters the unlocking portion 103, and the second locking member 4 is caught in the unlocking portion 103, so that the first target member and the second target member are locked to each other at the current position after the driving of the external force is stopped, that is, the first target member and the second target member are in a mutually unlocked state.

When the first target member moves from the first position to the second position relative to the second target member, because the unlocking portion 103 and the locking portion 102 are both arc-shaped groove structures, the first locking member 1 rotates synchronously with the first target member, the wall surface of the unlocking portion 103 presses the second locking member 4, the driving member 7 and the compression spring, so that the second locking member 4 is released from the unlocking portion 103 and retracts into the moving channel 502, and along with the rotation of the first target member, the part between the unlocking portion 103 and the locking portion 102 continuously presses the second locking member 4, so that the second locking member 4 is always located in the moving channel 502.

After the first target member is driven by external force to rotate to the second position relative to the second target member, the locking portion 102 is just arranged facing the moving channel 502, the arc-shaped groove of the locking portion 102 loses the pressing effect on the second locking member 4, the pressure spring is stretched, the driving member 7 is pushed to drive the second locking member 4 to move towards the locking portion 102, and part of the second locking member 4 (ball) enters the locking portion 102, so that after the driving by the external force is stopped, the second locking member 4 and the first locking member 1 can be mutually locked in a current state, namely, a state that the first target member and the second target member are mutually locked.

Preferably, the driving member 7 includes a guide part 701 having a flat plate structure, the shape of the guide part 701 is adapted to the shape of the accommodating space 501, the diameter of the guide part 701 is slightly smaller than that of the accommodating space 501, and the guide part 701 can reciprocate in the accommodating space 501 along the length direction of the accommodating space 501 without tilting or jamming; a side surface of the guide part 701 facing the elastic member 6 is provided with a connection part 702, the connection part 702 is protruded with respect to the guide part 701, and an outer diameter of the connection part 702 is equal to an inner diameter of the elastic member 6, so that an end of the elastic member 6 can be sleeved to the connection part 702 and connected with the connection part 702 to ensure stability between the elastic member 6 and the driving member 7. An abutting part 703 is arranged on one side of the guide part 701 facing the moving channel 502, the abutting part 703 protrudes relative to the guide part 701, the diameter of the abutting part 703 is slightly smaller than that of the moving channel 502, and a part of the abutting part 703 is positioned in the moving channel 502, so that the abutting part 703 can push the ball.

Preferably, the end surface of the abutting part 703 facing the ball is an arc 7031, and more preferably, the radian of the arc 7031 and the radians of the arc-shaped grooves of the locking part 102 and the unlocking part 103 are both adapted to the radian of the ball, so that the ball has a large contact area with the abutting part 703, the locking part 102 and the unlocking part 103, thereby ensuring the reliability and flexibility of the self-locking action process and avoiding the occurrence of jamming and locking.

Preferably, the fixing member 8 includes a fixing seat 801 having a plate structure or a block structure, the fixing seat 801 blocks the second opening of the bottom end of the housing 5, and the fixing seat 801 is used for connecting with a second target member, preferably, the outer surface of the housing 5 is also connected with the second target member to ensure the stability of the locking assembly as a whole with respect to the second target member, and the connection manner between the housing 5 and the second target member may be, but is not limited to, welding.

More preferably, a side surface of the fixing seat 801 facing the elastic element 6 is provided with a protruding portion 802, an outer diameter of the protruding portion 802 is approximately equal to an inner diameter of the elastic element 6, so that an end portion of the elastic element 6 can be sleeved on the protruding portion 802 and connected with the protruding portion 802 to ensure stability of the elastic element 6 relative to the fixing member 8.

Further, since the diameter of the mounting space 503 is greater than the diameter of the accommodating space 501, the diameter of the fixing seat 801 is equal to the inner diameter of the mounting space 503, the diameter of the protrusion 802 is smaller than the inner diameter of the elastic element 6 and smaller than the inner diameter of the accommodating space 501, so that a step portion is formed between the mounting space 503 and the accommodating space 501, such a structure can ensure the stability of the elastic element 6, and in the process of stretching or compressing the elastic element 6, the elastic element 6 cannot be clamped between the mounting space 503 and the accommodating space 501, so as to avoid the change of the force receiving or applying direction of the elastic element 6, thereby avoiding the influence on the moving direction of the driving member 7, but avoiding the reliability of the self-locking process between the second locking member 4 and the first locking member 1.

To sum up, the self-locking mechanism that this application provided, simple structure, easily processing to the self-locking process is nimble, has stronger reliability and auto-lock precision, ensures the stability under the latched position or the unblock position between the component or the device that need lock each other.

The embodiment of the present application further provides a double-eccentric butterfly valve (not shown in the figure), which includes the self-locking mechanism described in any of the above embodiments, and therefore, all the beneficial technical effects of the self-locking mechanism are achieved, and the description is omitted here.

Further, the double-eccentric butterfly valve provided by the embodiment further comprises a driving device, a valve plate and a valve seat, wherein the driving device can be but not limited to a cylinder, the driving device comprises a fixed shell and a driving rod capable of moving relative to the fixed shell, the driving rod is connected with the valve plate so that the valve plate can rotate relative to the valve seat, the valve plate has an opening position and a closing position relative to the valve seat, in the opening position, the double-eccentric butterfly valve is in an opening state, the sealing edge of the valve plate is not in contact with the valve seat, and a medium can flow from one side of the valve seat to the other side; in the closed position, the double eccentric butterfly valve is in the closed state, the sealing edge of the valve plate contacts the valve seat, and the medium no longer flows through the double eccentric butterfly valve.

Further, the connecting rod 2 in the above embodiment is connected to the driving rod, so that the connecting rod 2 can move synchronously with the driving rod, the housing 5 of the locking assembly is disposed on the fixed housing, that is, in this case, the driving rod serves as the first target member, the fixed housing serves as the second target member, and by performing mutual self-locking between the driving rod and the fixed housing, the driving rod drives the valve plate to move between the open position and the closed position, and there is no intermediate state or excessively rotating turntable, so that self-locking between the valve plate and the valve seat at the open position and the closed position is realized, and thus the sealing effect of the double eccentric butterfly valve in the closed state is ensured.

Furthermore, a connecting line between the circle centers of the locking portion 102 and the main body 101 is perpendicular to a connecting line between the unlocking portion 103 and the circle center of the main body 101, so that position switching between the ball and the locking portion 102 and the unlocking portion 103 can correspond to the rotation condition of the valve plate relative to the valve seat, the valve plate is opened (closed) relative to the valve seat after rotating 90 degrees relative to the valve seat, and the valve plate is closed (or opened) relative to the valve seat after rotating 90 degrees relative to the valve seat, thereby ensuring the reliability of the self-locking process when the self-locking mechanism is used for the double-eccentric butterfly valve, ensuring the locking precision, and avoiding the influence on the sealing effect due to slight rotation of the valve plate.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-locking mechanism, comprising:

a first locking member provided with a lock portion and an unlock portion;

2. The self-locking mechanism of claim 1, wherein the first locking member comprises:

3. The self-locking mechanism according to claim 2, wherein the unlocking portion and the locking portion are arc-shaped grooves formed in the locking wall surface.

4. The self-locking mechanism of claim 2, wherein the body has a disc structure and the body is further formed with a weight-reduced portion.

5. The self-locking mechanism of claim 2, wherein the locking assembly comprises:

6. The self-locking mechanism of claim 5, wherein the drive assembly comprises:

the elastic piece is arranged in the accommodating space;

7. The self-locking mechanism of claim 6, wherein the drive member comprises:

a guide portion to which the connection portion is connected;

8. The self-locking mechanism according to any one of claims 2 to 7, wherein a line between the center of the locking portion and the center of the main body and a line between the center of the unlocking portion and the center of the main body are perpendicular to each other.

9. A double eccentric butterfly valve comprising a self-locking mechanism according to any one of claims 1 to 8.

10. The double eccentric butterfly valve of claim 9, further comprising: