Valve clack anti-rotation mechanism and check valve

Abstract

The utility model discloses a valve clack anti-rotation mechanism and a check valve, the valve clack anti-rotation mechanism comprises a rocker arm, and one end of the rocker arm is used for being rotatably arranged in a valve body; the free end of the rocker arm is provided with a valve clack through a connecting assembly. Two anti-rotation plates are arranged on the side wall, facing the rocker arm, of the valve clack in a protruding mode and abut against the two side walls, in the width direction of the rocker arm, of the rocker arm correspondingly. An anti-rotation piece is coaxially and convexly arranged on the side wall, facing the rocker arm, of the valve clack, and the section profile, perpendicular to the axial direction, of the anti-rotation piece comprises a first straight section; an anti-rotation hole is formed in the position, corresponding to the anti-rotation piece, of the rocker arm in a penetrating mode, the anti-rotation hole is used for allowing the anti-rotation piece to be connected in an inserted mode, the profile of the section, perpendicular to the axial direction, of the anti-rotation hole comprises a second straight section, and the second straight section is attached to the first straight section. The check valve is applied to the oxygen pipeline on the premise of ensuring the production safety.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a valve disc anti-rotation mechanism and a check valve. Background Technology

[0002] A check valve, also known as a non-return valve, one-way valve, or non-backflow valve, is designed to ensure the directional flow of media in a pipeline without causing backflow. Traditional check valves typically have separate valve discs and rocker arms. One end of the rocker arm is connected to the valve body and the other end is fastened to the valve disc. This allows the valve disc to naturally swing downwards under its own weight, blocking the valve body passage and achieving the check valve function. However, in traditional check valves, the valve disc tends to rotate relative to the rocker arm under the influence of the flowing media in the pipeline. This friction between the valve disc and the rocker arm can easily generate sparks. When such check valves are applied to oxygen pipelines, the sparks generated by the friction between the valve disc and the rocker arm can cause safety accidents in the oxygen pipeline, posing a threat to safe production. Utility Model Content

[0003] In view of this, the present invention provides a valve disc anti-rotation mechanism and a check valve to solve the problem that the valve disc of the existing check valve is prone to self-rotation relative to the rocker arm under the action of the flowing medium in the pipeline, and the friction between the valve disc and the rocker arm is prone to generate sparks, which poses a hidden danger to safe production.

[0004] In a first aspect, this utility model provides a valve disc anti-rotation mechanism, comprising:

[0005] A rocker arm, one end of which is rotatably mounted inside the valve body;

[0006] A valve disc is disposed at the free end of the rocker arm via a connecting assembly; two anti-rotation plates protrude from the side wall of the rocker arm facing the valve disc, and the two anti-rotation plates respectively abut against the two side walls of the rocker arm along the width direction of the rocker arm; an anti-rotation component is coaxially protruding from the side wall of the rocker arm facing the valve disc, and the cross-sectional profile of the anti-rotation component perpendicular to the axial direction includes a first straight segment; an anti-rotation hole is provided through the rocker arm corresponding to the position of the anti-rotation component, and the anti-rotation hole is used for the insertion of the anti-rotation component, and the cross-sectional profile of the anti-rotation hole perpendicular to the axial direction includes a second straight segment, and the second straight segment fits against the first straight segment.

[0007] The valve disc anti-rotation mechanism according to this utility model has at least the following beneficial effects:

[0008] By abutting the two anti-rotation plates of the valve disc against the two side walls of the rocker arm along the width direction of the rocker arm, the rocker arm is clamped between the two anti-rotation plates, forming the first anti-rotation line. By setting a first straight section in the cross-sectional profile of the anti-rotation component and a second straight section in the cross-sectional profile of the anti-rotation hole, after the anti-rotation component is inserted into the anti-rotation hole, the first straight section and the second straight section fit together, so that the anti-rotation component cannot rotate within the anti-rotation hole, forming the second anti-rotation line. This ensures that even under the strong action of the flowing medium, the valve disc cannot rotate relative to the rocker arm, thereby effectively reducing the possibility of sparks generated by friction between the valve disc and the rocker arm and improving production safety.

[0009] In one optional embodiment, the cross-sectional profile of the anti-rotation component perpendicular to the axial direction further includes a third straight section, and the cross-sectional profile of the anti-rotation hole perpendicular to the axial direction further includes a fourth straight section, the fourth straight section being in contact with the third straight section.

[0010] In one alternative implementation, the first straight section and the third straight section are arranged symmetrically about the center of the anti-rotation component.

[0011] In one optional embodiment, the rocker arm has an arcuate portion protruding from its sidewall along the width direction of the rocker arm, and the anti-rotation plate has an arcuate groove corresponding to the position of the arcuate portion, the arcuate groove matching the arcuate portion.

[0012] In one alternative implementation, the connection component includes:

[0013] The screw portion is coaxially connected to the end of the anti-rotation component away from the valve disc, and the screw portion extends out of the rocker arm;

[0014] Tighten the nut, which matches the screw section.

[0015] In one alternative embodiment, a washer is provided between the locking nut and the rocker arm.

[0016] In one optional embodiment, the locking nut and the screw portion are provided with insertion holes corresponding to each other radially along the screw portion, and the insertion holes are used for inserting the fixing pin.

[0017] In one alternative embodiment, the valve disc, the anti-rotation plate, the screw section, and the anti-rotation component are integrally formed.

[0018] Secondly, this utility model also provides a check valve, including the valve disc anti-rotation mechanism provided in the first aspect above.

[0019] Since the check valve includes a valve disc anti-rotation mechanism, which has the same beneficial effect as the valve disc anti-rotation mechanism, it will not be elaborated here.

[0020] In one optional embodiment, the valve body is further included, with an inlet channel for connecting to an external pipeline provided on one side of the valve body. A cavity is provided inside the valve body, and the cavity is connected to the inlet channel. The rocker arm is rotatably disposed in the cavity via a pin. The valve disc has a natural state in which it swings down under its own weight to block the connection between the inlet channel and the cavity. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of a check valve equipped with the valve disc anti-rotation mechanism of this embodiment;

[0023] Figure 2 This is a schematic diagram of the valve disc anti-rotation mechanism in this embodiment;

[0024] Figure 3 This is a side view of the rocker arm in the valve disc anti-rotation mechanism of this embodiment.

[0025] Figure 4 This is a schematic diagram of the valve disc structure in the valve disc anti-rotation mechanism of this embodiment;

[0026] Figure 5 for Figure 4 A structural diagram from another perspective.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-rocker arm, 110-anti-rotation hole, 111-second straight section, 112-fourth straight section, 120-arc section, 130-through hole;

[0029] 200 - Valve body, 210 - Inlet channel, 220 - Cavity, 230 - Pin;

[0030] 300-Valve disc, 310-Anti-rotation plate, 311-Circular arc groove, 320-Anti-rotation component, 321-First straight section, 322-Third straight section, 330-Screw section;

[0031] 410 - Lock nut, 420 - Washer, 430 - Retaining pin;

[0032] 500-valve seat. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0036] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0037] According to a first aspect of the present invention, a valve disc anti-rotation mechanism is provided, including a rocker arm 100, one end of which is rotatably disposed within a valve body 200; a valve disc 300 is disposed at the free end of the rocker arm 100 via a connecting assembly; two anti-rotation plates 310 are protruding from the side wall of the valve disc 300 facing the rocker arm 100, and the two anti-rotation plates 310 respectively abut against the two side walls of the rocker arm 100 along the width direction of the rocker arm 100; an anti-rotation member 320 is coaxially protruding from the side wall of the valve disc 300 facing the rocker arm 100, the cross-sectional profile of the anti-rotation member 320 perpendicular to the axial direction includes a first straight segment 321; an anti-rotation hole 110 is provided through the rocker arm 100 corresponding to the position of the anti-rotation member 320, the anti-rotation hole 110 is used for insertion of the anti-rotation member 320, the cross-sectional profile of the anti-rotation hole 110 perpendicular to the axial direction includes a second straight segment 111, the second straight segment 111 being fitted with the first straight segment 321.

[0038] The valve disc anti-rotation mechanism of this embodiment abuts the two anti-rotation plates 310 of the valve disc 300 against the two side walls of the rocker arm 100 along the width direction of the rocker arm 100, so that the rocker arm 100 is sandwiched between the two anti-rotation plates 310, forming a first anti-rotation line; and by setting a first straight section 321 in the cross-sectional profile of the anti-rotation member 320 and a second straight section 111 in the cross-sectional profile of the anti-rotation hole 110, after the anti-rotation member 320 is inserted into the anti-rotation hole 110, the first straight section 321 and the second straight section 111 fit together, so that the anti-rotation member 320 cannot rotate within the anti-rotation hole 110, forming a second anti-rotation line, thereby ensuring that the valve disc 300 cannot rotate relative to the rocker arm 100 under the large force of the flowing medium, thus effectively reducing the possibility of sparks generated by friction between the valve disc 300 and the rocker arm 100, and realizing the application of the check valve equipped with the valve disc anti-rotation mechanism of this embodiment in oxygen pipelines while ensuring production safety.

[0039] It should be noted that if only the anti-rotation line formed by the contact of the first straight section 321 and the second straight section 111 is used to prevent the valve disc 300 from rotating relative to the rocker arm 100, the first straight section 321 will be worn into an arc over time, causing the anti-rotation effect to fail. If only the anti-rotation line formed by the rocker arm 100 being sandwiched between the two anti-rotation plates 310 is used to prevent the valve disc 300 from rotating relative to the rocker arm 100, the force of the flowing medium will be mainly applied to the side wall of the rocker arm 100 along the width direction, which will cause some damage to the rocker arm 100 over time.

[0040] It is understandable that the axial direction mentioned in the text refers to the axial direction of the valve disc 300.

[0041] It should be noted that the free end of the rocker arm 100 refers to the end of the rocker arm 100 that is away from the connection between the rocker arm 100 and the valve body 200.

[0042] like Figure 3 and Figure 4 As shown, in some embodiments, the cross-sectional profile of the anti-rotation component 320 perpendicular to the axial direction further includes a third straight section 322, and the cross-sectional profile of the anti-rotation hole 110 perpendicular to the axial direction further includes a fourth straight section 112, which fits into the third straight section 322. Through the cooperation of the third straight section 322 and the fourth straight section 112, the force of the flowing medium is better diffused and transmitted between the valve disc 300 and the rocker arm 100, which is more conducive to preventing the valve disc 300 from rotating relative to the rocker arm 100.

[0043] like Figure 4 As shown, specifically, the first straight segment 321 and the third straight segment 322 are arranged symmetrically about the center of the anti-rotation component 320. This arrangement allows the force of the flowing medium to be better diffused and transmitted between the anti-rotation component 320 and the anti-rotation hole 110, which is more conducive to preventing the valve disc 300 from rotating relative to the rocker arm 100.

[0044] like Figure 3 and Figure 4 As shown, in some embodiments, the rocker arm 100 has an arcuate portion 120 protruding from its sidewall along the width direction of the rocker arm 100, and the anti-rotation plate 310 has an arcuate groove 311 corresponding to the position of the arcuate portion 120, the arcuate groove 311 matching the arcuate portion 120. This arrangement increases the limiting effect of the anti-rotation plate 310 and the sidewall of the rocker arm 100 along the width direction of the rocker arm 100, which is more conducive to preventing the valve disc 300 from rotating relative to the rocker arm 100.

[0045] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the connecting assembly includes a screw portion 330 and a locking nut 410. The screw portion 330 is coaxially connected to the end of the anti-rotation member 320 away from the valve disc 300, and the screw portion 330 extends outside the rocker arm 100. The locking nut 410 matches the screw portion 330. During the assembly of the separately configured rocker arm 100 and valve disc 300 into one unit, after the anti-rotation member 320 is inserted into the anti-rotation hole 110, the screw portion 330 extends outside the rocker arm 100. At this time, it is only necessary to tighten the locking nut 410 onto the screw portion 330. The entire assembly process is simple to operate.

[0046] like Figure 1 and Figure 2 As shown, specifically, a washer 420 is provided between the locking nut 410 and the rocker arm 100; the washer 420 can prevent the locking nut 410 from loosening under vibration or impact, and improve the connection tightness between the rocker arm 100 and the valve disc 300.

[0047] like Figure 2 As shown, specifically, the locking nut 410 and the screw portion 330 are provided with corresponding insertion holes along the radial direction of the screw portion 330. The insertion holes are used for the insertion of the fixing pin 430. After the locking nut 410 is tightened onto the screw portion 330, the insertion holes of the screw portion 330 and the locking nut 410 are aligned. Inserting the fixing pin 430 into the insertion hole restricts the degree of freedom of rotation of the locking nut 410 relative to the screw portion 330, thereby effectively preventing the locking nut 410 from loosening under vibration or impact and improving the connection tightness between the rocker arm 100 and the valve disc 300.

[0048] Specifically, the valve disc 300, anti-rotation plate 310, screw part 330 and anti-rotation component 320 are integrally cast, making the structure more robust.

[0049] like Figures 1 to 5As shown, according to a second aspect of the present invention, a check valve is also provided, including the valve disc anti-rotation mechanism provided in the first aspect of the present invention. The valve disc anti-rotation mechanism in the check valve of this embodiment forms a first anti-rotation line by having two anti-rotation plates 310 of the valve disc 300 abut against the two side walls of the rocker arm 100 along the width direction of the rocker arm 100. The rocker arm 100 is then sandwiched between the two anti-rotation plates 310. Furthermore, a first straight section 321 is provided in the cross-sectional profile of the anti-rotation member 320, and a second straight section 111 is provided in the cross-sectional profile of the anti-rotation hole 110. After the anti-rotation member 320 is inserted into the anti-rotation hole 110, the first straight section 321 and the second straight section 111 fit together, preventing the anti-rotation member 320 from rotating within the anti-rotation hole 110. This forms a second anti-rotation line, ensuring that the valve disc 300 cannot rotate relative to the rocker arm 100 even under the influence of a large flowing medium. This effectively reduces the possibility of sparks generated by friction between the valve disc 300 and the rocker arm 100, enabling the check valve of this embodiment to be applied to oxygen pipelines while ensuring production safety.

[0050] like Figure 1 As shown, in some embodiments, the check valve further includes a valve body 200. One side of the valve body 200 is provided with an inlet channel 210 for connecting to an external pipeline. A cavity 220 is provided inside the valve body 200, communicating with the inlet channel 210. A rocker arm 100 is rotatably disposed within the cavity 220 via a pin 230. During the flow of the medium, the force of the flowing medium can push the valve disc 300 and the rocker arm 100 to swing upwards around the pin 230, thus allowing the connection between the inlet channel 210 and the cavity 220 to facilitate the flow of the medium. When the flow of the medium stops, i.e., the force exerted by the flowing medium on the valve disc 300 and the rocker arm 100 disappears, the valve disc 300, under its own weight, swings downwards to block the connection, thereby achieving the check valve function.

[0051] Specifically, a through hole 130 is provided at one end of the rocker arm 100 away from the valve disc 300 along the length direction of the rocker arm 100, and the through hole 130 is rotatably engaged with the pin 230.

[0052] Specifically, a valve seat 500 is provided on the end face of the inlet channel 210 facing the cavity 220. The valve seat 500 and the valve disc 300 are in a hard seal fit, which provides a good sealing effect.

[0053] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A valve disc anti-rotation mechanism, characterized in that, include: A rocker arm (100) is rotatably mounted inside a valve body (200) at one end; A valve disc (300) is disposed at the free end of the rocker arm (100) via a connecting assembly; two anti-rotation plates (310) protrude from the side wall of the valve disc (300) facing the rocker arm (100), and the two anti-rotation plates (310) respectively abut against the two side walls of the rocker arm (100) along the width direction of the rocker arm (100); an anti-rotation component (320) is coaxially protruding from the side wall of the valve disc (300) facing the rocker arm (100), and the... The anti-rotation component (320) has a cross-sectional profile perpendicular to the axial direction, including a first straight segment (321); the rocker arm (100) is provided with an anti-rotation hole (110) corresponding to the position of the anti-rotation component (320), the anti-rotation hole (110) is used for the anti-rotation component (320) to be inserted, the cross-sectional profile of the anti-rotation hole (110) perpendicular to the axial direction includes a second straight segment (111), the second straight segment (111) is in contact with the first straight segment (321).

2. The valve disc anti-rotation mechanism according to claim 1, characterized in that, The cross-sectional profile of the anti-rotation component (320) perpendicular to the axial direction also includes a third straight section (322), and the cross-sectional profile of the anti-rotation hole (110) perpendicular to the axial direction also includes a fourth straight section (112), which fits into the third straight section (322).

3. The valve disc anti-rotation mechanism according to claim 2, characterized in that, The first straight segment (321) and the third straight segment (322) are arranged symmetrically about the center of the anti-rotation component (320).

4. A valve disc anti-rotation mechanism according to any one of claims 1 to 3, characterized in that, The rocker arm (100) has an arc-shaped portion (120) protruding from its side wall along the width direction of the rocker arm (100). The anti-rotation plate (310) has an arc groove (311) corresponding to the position of the arc-shaped portion (120). The arc groove (311) matches the arc-shaped portion (120).

5. A valve disc anti-rotation mechanism according to any one of claims 1 to 3, characterized in that, The connection component includes: A screw portion (330) is coaxially connected to one end of the anti-rotation member (320) away from the valve disc (300), and the screw portion (330) extends outside the rocker arm (100); The locking nut (410) is matched with the screw portion (330).

6. The valve disc anti-rotation mechanism according to claim 5, characterized in that, A washer (420) is provided between the locking nut (410) and the rocker arm (100).

7. A valve disc anti-rotation mechanism according to claim 5, characterized in that, The locking nut (410) and the screw portion (330) are provided with insertion holes corresponding to each other in the radial direction of the screw portion (330), and the insertion holes are used for the insertion of the fixing pin (430).

8. A valve disc anti-rotation mechanism according to claim 5, characterized in that, The valve disc (300), the anti-rotation plate (310), the screw part (330), and the anti-rotation component (320) are integrally formed.

9. A check valve, characterized in that, Includes the valve disc anti-rotation mechanism according to any one of claims 1 to 8.

10. A check valve according to claim 9, characterized in that, It also includes a valve body (200), one side of which is provided with an inlet channel (210) for connecting to an external pipeline. A cavity (220) is provided inside the valve body (200), and the cavity (220) is connected to the inlet channel (210). The rocker arm (100) is rotatably disposed in the cavity (220) via a pin (230). The valve disc (300) has a natural state in which it swings down under its own weight to block the connection between the inlet channel (210) and the cavity (220).

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