Recoil disc assembly and safety valve

Abstract

The recoil disc assembly comprises a recoil disc, a valve clack and a clamping piece, the recoil disc is provided with a mounting through hole, and the inner wall of the mounting through hole is provided with a protruding part and a first sealing part which are arranged in the axial direction of the mounting through hole; the valve clack comprises a connecting rod and a second sealing part, the connecting rod is arranged in the mounting through hole in a penetrating mode, a clamping groove is formed in the peripheral face of the connecting rod, one part of the clamping piece is clamped in the clamping groove, and the other part of the clamping piece is arranged outside the clamping groove and abuts against the protruding part in the direction facing the first sealing part. And the first sealing part is matched with the second sealing part in the axial direction of the mounting through hole to fix the valve clack. Reliable connection between the valve clack and the recoil disc can be achieved, the stability of the valve clack is enhanced, the valve clack is prevented from loosening and even falling off, normal work of the safety valve is effectively guaranteed, and the use safety is high.

Description

Technical Field

[0001] This invention relates to the field of safety valve technology, and more specifically to a backflush plate assembly and a safety valve. Background Technology

[0002] With the development of industrial production, safety valves, as key safety protection devices for pressure vessels, pressure pipelines, boilers, and other pressure-bearing equipment, are crucial for ensuring the safety of equipment and operators. However, in existing technologies, although the threaded connection between the valve disc and the backwash plate of traditional safety valves is simple in structure and easy to install and disassemble, the valve disc is prone to rotation due to the impact of the medium under vibration conditions and during the opening and closing of the safety valve. This can lead to loosening or even detachment of the threaded connection, affecting the normal operation of the safety valve and potentially causing safety accidents. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention provide a backflush disc assembly and a safety valve.

[0005] The backflush disc assembly of this invention includes a backflush disc, a valve disc, and a snap-fit ​​component. The backflush disc has a mounting through hole, and the inner wall of the mounting through hole is provided with a protrusion and a first sealing portion arranged axially along the mounting through hole. The valve disc includes a connecting rod and a second sealing portion. The connecting rod passes through the mounting through hole, and the outer peripheral surface of the connecting rod is provided with a groove. The second sealing portion abuts against the first sealing portion along the axial direction of the mounting through hole and is sealed to the first sealing portion.

[0006] The snap-fit ​​member is disposed along the axial direction of the mounting through hole on the side of the protrusion away from the first sealing part. A portion of the snap-fit ​​member is snapped into the slot, and another portion of the snap-fit ​​member is disposed outside the slot and abuts against the protrusion in the direction toward the first sealing part, so as to cooperate with the second sealing part in the axial direction of the mounting through hole to fix the valve disc.

[0007] In some embodiments, the protrusion is an annular protrusion surrounding the axis of the mounting through hole, the slot is an annular slot surrounding the axis of the connecting rod, and the snap-fit ​​is a snap ring, which is sleeved on the connecting rod and a portion of the snap ring snaps into the slot.

[0008] In some embodiments, the retaining ring is formed by a plurality of arc-shaped segments.

[0009] In some embodiments, the backflush disc assembly of the present invention includes a retaining sleeve, which is disposed in the mounting through hole and sleeved on the connecting rod. The inner circumferential surface of the retaining sleeve abuts against the outer circumferential surface of the retaining ring, and the outer circumferential surface of the retaining sleeve abuts against the inner wall of the mounting through hole.

[0010] In some embodiments, the top surface of the retaining ring is provided with a first chamfer at the junction of its top surface and its outer peripheral surface, and the bottom surface of the retaining sleeve is provided with a second chamfer at the junction of its bottom surface and its inner peripheral surface.

[0011] In some embodiments, the protrusion has a first end face and a second end face that are axially opposite to each other along the mounting through hole, the first end face being adjacent to the second sealing portion and forming the first sealing portion.

[0012] In some embodiments, the second end face is a concave first arc-shaped surface, and the second sealing portion includes a convex second arc-shaped surface, wherein the first arc-shaped surface is adapted to the second arc-shaped surface.

[0013] In some embodiments, the valve disc further includes a third sealing portion, which is disposed along the axial direction of the mounting through hole on the side of the second sealing portion away from the connecting rod, and the third sealing portion is used to seal with the valve seat.

[0014] In some embodiments, the backflush disc further includes a guide hole communicating with the mounting through hole, the third sealing part is disposed in the guide hole, and the outer peripheral surface of the third sealing part has a guide protrusion, the guide protrusion being guided and engaged with the inner wall of the guide hole along the axial direction of the mounting through hole.

[0015] The installation valve in this embodiment of the invention includes the backflush disc assembly described in any of the above embodiments.

[0016] In this embodiment of the invention, during assembly of the recoil disc assembly, the connecting rod is inserted into the mounting through hole, and the second sealing part abuts against the first sealing part to ensure a seal between the recoil disc and the valve disc under normal operating conditions. After the second sealing part abuts against the first sealing part, a portion of the snap-fit ​​member is snapped into the slot, and the other portion of the snap-fit ​​member abuts against the protrusion, so that the snap-fit ​​member and the second sealing part cooperate axially in the mounting through hole to fix the valve disc.

[0017] When operating under vibration, during the opening and closing of the safety valve, or when the valve disc is impacted by the medium, the valve disc and the backflush disc can be reliably connected by adding a snap-fit ​​limiter, which enhances the stability of the valve disc, prevents the valve disc from loosening or even falling off, effectively ensures the normal operation of the safety valve, and provides high safety in use. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of the backflush disc assembly according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the retaining ring according to an embodiment of the present invention.

[0020] Figure label:

[0021] 100. Backflush disc assembly; 1. Backflush disc; 101. Mounting through hole; 102. Protrusion; 1021. First end face; 1022. Second end face; 103. First sealing part; 104. Guide hole; 2. Valve disc; 201. Connecting rod; 2011. Slot; 202. Second sealing part; 203. Third sealing part; 2031. Guide protrusion; 3. Snap-fit ​​part; 301. Arc-shaped segment; 302. First chamfer; 4. Sleeve; 401. Second chamfer. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figure 1 and Figure 2 As shown, the backflush disc assembly 100 of this embodiment includes a backflush disc 1, a valve disc 2, and a snap-fit ​​member 3. The backflush disc 1 has a mounting through hole 101, and the inner wall of the mounting through hole 101 is provided with a protrusion 102 and a first sealing part 103 arranged axially along the mounting through hole 101. The valve disc 2 includes a connecting rod 201 and a second sealing part 202. The connecting rod 201 passes through the mounting through hole 101, and the outer peripheral surface of the connecting rod 201 is provided with a groove 2011. The second sealing part 202 abuts against the first sealing part 103 along the axial direction of the mounting through hole 101 and is in a sealing fit with the first sealing part 103.

[0024] The snap-fit ​​member 3 is disposed along the axial direction of the mounting through hole 101 on the side of the protrusion 102 away from the first sealing part 103. A part of the snap-fit ​​member 3 is snapped into the slot 2011, and the other part of the snap-fit ​​member 3 is disposed outside the slot 2011 and abuts against the protrusion 102 in the direction toward the first sealing part 103, so as to cooperate with the second sealing part 202 in the axial direction of the mounting through hole 101 to fix the valve disc 2.

[0025] During assembly, the backflush disc assembly 100 of this embodiment of the invention involves inserting the connecting rod 201 into the mounting through hole 101 and having the second sealing part 202 abut against the first sealing part 103 to ensure a seal between the backflush disc 1 and the valve disc 2 under normal operating conditions. After the second sealing part 202 abuts against the first sealing part 103, a portion of the snap-fit ​​member 3 is snapped into the slot 2011, and another portion of the snap-fit ​​member 3 abuts against the protrusion 102, so that the snap-fit ​​member 3 and the second sealing part 202 engage axially in the mounting through hole 101 to fix the valve disc.

[0026] When the valve is under vibration, during the opening and closing of the safety valve, or when the valve disc 2 is impacted by the medium, the valve disc 2 and the backflush disc 1 can be reliably connected by the snap-fit ​​limit of the snap-fit ​​part 3. This enhances the stability of the valve disc 2, prevents the valve disc 2 from loosening or even falling off, effectively ensures the normal operation of the safety valve, and provides high safety in use.

[0027] In some embodiments, the protrusion 102 is an annular protrusion surrounding the axis of the mounting through hole 101, the slot 2011 is an annular slot surrounding the axis of the connecting rod 201, and the snap-fit ​​3 is a snap ring, which is sleeved on the connecting rod 201 and a portion of the snap ring is snapped into the slot 2011.

[0028] like Figure 1 and Figure 2 As shown, since the protrusion 102 adopts an annular protrusion form surrounding the axis of the mounting through hole 101, and the retaining ring is sleeved on the connecting rod 201 with a portion of the retaining ring engaged in the retaining groove 2011, a continuous support surface is formed between the annular protrusion and the retaining ring. This allows for a more even distribution of the force experienced by the valve disc 2 during opening and closing, thereby reducing the risk of damage caused by localized stress concentration. Simultaneously, the retaining ring and the annular retaining groove provide a simple installation method and facilitate disassembly, helping to reduce maintenance costs and time.

[0029] Optionally, the retaining ring is formed by multiple arc-shaped segments 301.

[0030] like Figure 2 As shown, the retaining ring is formed by three arc-shaped segments 301 of equal length.

[0031] Since multiple arc-shaped segments 301 enclose to form a retaining ring, when installing the retaining ring, the arc-shaped segments 301 can be installed one by one into the annular retaining groove, and then joined together in the annular retaining groove to form the retaining ring. During disassembly, the retaining ring is removed by taking out the arc-shaped segments 301 one by one. The entire installation process is simple and quick, improving installation efficiency.

[0032] In some embodiments of the present invention, the backflush disc assembly 100 includes a sleeve 4, which is disposed in the mounting through hole 101 and sleeved on the connecting rod 201. The inner peripheral surface of the sleeve 4 abuts against the outer peripheral surface of the retaining ring, and the outer peripheral surface of the sleeve 4 abuts against the inner wall of the mounting through hole 101.

[0033] like Figure 1 As shown, specifically, during installation, the retaining ring can be installed first, and then the retaining sleeve 4 can be fitted onto the connecting rod 201 and the retaining ring. During disassembly, the retaining sleeve 4 can be removed first, and then the retaining ring and connecting rod 201 can be taken out. The retaining sleeve 4 makes the installation and disassembly process easier.

[0034] The ferrule 4 serves to secure the retaining ring and connecting rod 201 by abutting against the outer circumference of the retaining ring with its inner circumference surface, and against the inner wall of the mounting through hole 101 with its outer circumference surface. This double-stopping structure increases the axial and radial fixing force, thereby improving the stability of the valve disc 2. By adding the ferrule 4 component, the overall structural reliability is improved, reducing potential safety risks due to connection failure. At the same time, the ferrule 4 also helps to provide additional sealing effect, ensuring that the sealing performance between the valve disc 2 and the backflush disc 1 is not reduced due to vibration or impact.

[0035] In some embodiments, a first chamfer 302 is provided at the junction of the top surface and the outer peripheral surface of the retaining ring, and a second chamfer 401 is provided at the junction of the bottom surface and the inner peripheral surface of the retaining sleeve 4.

[0036] like Figure 1 As shown, when installing the ferrule 4, the first chamfer 302 and the second chamfer 401 can act as guides to help the ferrule 4 smoothly fit onto the retaining ring, making installation and disassembly smoother and reducing maintenance costs and time.

[0037] In some embodiments, the protrusion 102 has a first end face 1021 and a second end face 1022 that are axially opposite to each other along the mounting through hole 101. The first end face 1021 is adjacent to the second sealing portion 202 and forms the first sealing portion 103.

[0038] like Figure 1 As shown, the first end face 1021 forms the first sealing part 103. That is to say, the first sealing part 103 does not need to be separately provided on the inner wall of the mounting through hole 101 for sealing and cooperating with the second sealing part 202. This simplifies the structure of the backflush plate 1 and makes the structure of the backflush plate 1 simple.

[0039] In some embodiments, the second end face 1022 is a concave first arc-shaped surface, and the second sealing part 202 includes a convex second arc-shaped surface, wherein the first arc-shaped surface is adapted to the second arc-shaped surface.

[0040] The fitting of the two curved surfaces achieves a better sealing effect, effectively preventing media leakage, especially under high pressure or high temperature operating conditions. The curved surface also increases the contact area, which helps to distribute pressure, thereby enhancing the strength and stability of the structure.

[0041] In some embodiments, the valve disc 2 further includes a third sealing part 203, which is disposed along the axial direction of the mounting through hole 101 on the side of the second sealing part 202 away from the connecting rod 201, and is used to seal with the valve seat.

[0042] The third sealing part 203 is located on the side of the second sealing part 202 away from the connecting rod 201. That is, the third sealing part 203 is close to the valve seat. When the valve disc 2 is closed, the third sealing part 203 can form an effective seal with the valve seat to prevent media leakage when the safety valve is closed.

[0043] Specifically, when the pressure in the system reaches the set pressure of the safety valve, valve disc 2 is lifted, the medium is discharged through the safety valve, and the pressure drops. When the pressure drops below the set value, valve disc 2 closes again under the action of spring or gravity. At this time, the third sealing part 203 fits tightly with the valve seat to achieve a seal.

[0044] In some embodiments, the backflush disc 1 further includes a guide hole 104 communicating with the mounting through hole 101, a third sealing part 203 is disposed in the guide hole 104, and a guide protrusion 2031 is provided on the outer peripheral surface of the third sealing part 203. The guide protrusion 2031 guides and cooperates with the inner wall of the guide hole 104 along the axial direction of the mounting through hole 101.

[0045] The guide hole 104 communicates with the mounting through hole 101 to accommodate the third sealing part 203. The guide hole 104 helps guide the third sealing part 203 to be accurately aligned with the valve seat, thereby improving the accuracy and reliability of the seal and ensuring the sealing effect. The guide protrusion 2031 on the outer peripheral surface of the third sealing part 203 forms a guiding fit with the inner wall of the guide hole 104, which helps to maintain the correct position of the third sealing part 203 during the movement of the valve disc 2, prevents the sealing part from shifting under vibration or impact, and enhances the stability of the seal.

[0046] The installation valve of this invention includes the backflush disc assembly 100 in any of the above embodiments.

[0047] When the valve is under vibration, during the opening and closing of the safety valve, or when the valve disc 2 is impacted by the medium, the valve disc 2 and the backflush disc 1 can be reliably connected by the snap-fit ​​limit of the snap-fit ​​part 3. This enhances the stability of the valve disc 2, prevents the valve disc 2 from loosening or even falling off, effectively ensures the normal operation of the safety valve, and provides high safety in use.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A recoil disc assembly, characterized in that, include: A backflush disc (1) has a mounting through hole (101), and the inner wall of the mounting through hole (101) is provided with a protrusion (102) and a first sealing part (103) arranged along the axial direction of the mounting through hole (101). The valve disc (2) includes a connecting rod (201) and a second sealing part (202). The connecting rod (201) passes through the mounting through hole (101). The outer peripheral surface of the connecting rod (201) is provided with a groove (2011). The second sealing part (202) abuts against the first sealing part (103) along the axial direction of the mounting through hole (101) and is sealed with the first sealing part (103). A snap-fit ​​member (3) is provided along the axial direction of the mounting through hole (101) on the side of the protrusion (102) away from the first sealing part (103). A part of the snap-fit ​​member (3) is snapped into the slot (2011), and another part of the snap-fit ​​member (3) is provided outside the slot (2011) and abuts against the protrusion (102) in the direction toward the first sealing part (103) so as to cooperate with the second sealing part (202) in the axial direction of the mounting through hole (101) to fix the valve disc (2).

2. The recoil disc assembly according to claim 1, characterized in that, The protrusion (102) is an annular protrusion surrounding the axis of the mounting through hole (101), the slot (2011) is an annular slot surrounding the axis of the connecting rod (201), and the snap-fit ​​(3) is a snap ring, which is sleeved on the connecting rod (201) and a part of the snap ring is snapped into the slot (2011).

3. The recoil disc assembly according to claim 2, characterized in that, The retaining ring is formed by multiple arc-shaped segments (301).

4. The recoil disc assembly according to claim 2, characterized in that, Includes a retainer (4), which is disposed in the mounting through hole (101) and sleeved on the connecting rod (201). The inner circumferential surface of the retainer (4) abuts against the outer circumferential surface of the retaining ring, and the outer circumferential surface of the retainer (4) abuts against the inner wall of the mounting through hole (101).

5. The recoil disc assembly according to claim 4, characterized in that, The top surface of the retaining ring is provided with a first chamfer (302) at the junction of the top surface and the outer peripheral surface, and the bottom surface of the retaining sleeve (4) is provided with a second chamfer (401) at the junction of the bottom surface and the inner peripheral surface.

6. The recoil disc assembly according to claim 2, characterized in that, The protrusion (102) has a first end face (1021) and a second end face (1022) that are axially opposite to the mounting through hole (101), the first end face (1021) being adjacent to the second sealing portion (202) and forming the first sealing portion (103).

7. The recoil disc assembly according to claim 6, characterized in that, The second end face (1022) is a concave first arc-shaped surface, and the second sealing part (202) includes a convex second arc-shaped surface, wherein the first arc-shaped surface is adapted to the second arc-shaped surface.

8. The recoil disc assembly according to claim 1, characterized in that, The valve disc (2) further includes a third sealing part (203), which is located on the side of the second sealing part (202) away from the connecting rod (201) along the axial direction of the mounting through hole (101). The third sealing part (203) is used to seal with the valve seat.

9. The recoil disc assembly according to claim 8, characterized in that, The backflush disc (1) also includes a guide hole (104) communicating with the mounting through hole (101). The third sealing part (203) is disposed in the guide hole (104). The outer peripheral surface of the third sealing part (203) has a guide protrusion (2031). The guide protrusion (2031) guides and cooperates with the inner wall of the guide hole (104) along the axial direction of the mounting through hole (101).

10. An installation valve, characterized in that, Includes the backflush plate assembly as described in any one of claims 1-9.

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