Valve anti-loosening assembly and eccentric butterfly valve with same

Abstract

The utility model relates to the technical field of fluid control valves, in particular to a valve anti-loosening assembly and an eccentric butterfly valve with the valve anti-loosening assembly. The valve anti-loosening assembly comprises a pressing ring, at least two through holes are formed in the pressing ring in a penetrating mode; the fixing piece is parallel to the pressing ring, a matching notch is formed in the fixing piece, and the matching notch is aligned with one of the through holes; the matching piece penetrates through one of the through holes and then is connected with the matching notch in a matched mode so that the pressing ring can be connected with the fixing piece; and the auxiliary part penetrates through the other through hole, and the auxiliary part is in abutting fit with the fixing part so as to apply pre-tightening tension to the matching part. In the process that the valve is used for a long time and is continuously opened and closed, due to the fact that the matching piece is subjected to pre-tightening tension, it can be guaranteed that the pressing ring and the fixing piece are always pressed by the matching piece, and the leakage phenomenon caused by looseness between the pressing ring and the fixing piece after the valve is used for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control valves, in particular to a valve anti-loosening component and an eccentric butterfly valve having the same. Background Art

[0002] The double eccentric butterfly valve is a further improvement on the single eccentric butterfly valve. Its structure is that the valve stem axis is offset from both the center of the butterfly plate and the center of the body. The double eccentric effect allows the butterfly plate to quickly separate from the valve seat after the valve is opened, which can greatly eliminate unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat, reduce the opening resistance, reduce wear, and increase the life of the valve seat. The significant reduction in scraping also allows the double eccentric butterfly valve to use a metal valve seat, which improves the application of butterfly valves in high temperature fields.

[0003] Since the double eccentric butterfly valve relies on the principle of position sealing structure to seal, that is, the sealing surface of the butterfly plate and the valve seat is in line contact, and the sealing effect is produced by the elastic deformation caused by the butterfly plate squeezing the valve seat, the closing position requirement is very high. In the prior art, when the double eccentric butterfly valve of large-caliber water system works for a long time, after the valve has undergone multiple switching actions, the screws set at the valve seat and the pressure ring will loosen, resulting in leakage at the valve seat, affecting the normal operation of the double eccentric butterfly valve. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that the screws set at the valve seat and the pressure ring of the double eccentric butterfly valve will loosen when working for a long time, resulting in leakage at the valve seat, thereby providing a valve anti-loosening component and an eccentric butterfly valve having the same.

[0005] In order to solve the above technical problems, the utility model provides a valve anti-loosening assembly, comprising:

[0006] A pressure ring having at least two through holes therethrough;

[0007] A fixing member is arranged parallel to the pressure ring, and a matching notch is arranged on the fixing member, and the matching notch is aligned with one of the through holes;

[0008] A matching piece, which penetrates through one of the through holes and is matched and connected with the matching notch to connect the pressure ring with the fixing piece;

[0009] The auxiliary component is arranged through the other through hole, and the auxiliary component abuts against and tightly fits with the fixing component to apply a pre-tightening tension to the matching component.

[0010] Optionally, the auxiliary component is an auxiliary stud, the auxiliary stud is threadedly matched with the through hole, and the end of the auxiliary stud is tightly matched with the fixing component.

[0011] Optionally, the mating piece is a locking bolt, and the locking bolt is threadably mated with the mating notch.

[0012] Optionally, the fixing member is a butterfly plate and / or a valve stem.

[0013] Optionally, the butterfly plate is installed in parallel with the pressure ring, and the valve stem is fixedly installed between the butterfly plate and the pressure ring.

[0014] Optionally, a valve seat is sleeved and mounted on the pressure ring, the valve seat is installed on a side of the pressure ring facing the fixing member, and the valve seat is arranged between the valve seat and the fixing member.

[0015] Optionally, a valve body is further included, and the valve seat is suitable for sealingly cooperating with the valve body.

[0016] Optionally, the auxiliary component is a clamping column, a first clamping component is provided on the clamping column, a second clamping component is provided on the through hole that is mounted in cooperation with the auxiliary component, and the first clamping component is clamped and fixed with the second clamping component.

[0017] Optionally, the first clamping member is a clamping block, and the second clamping member is a clamping slot;

[0018] Or the first clamping member is a clamping slot, and the second clamping member is a clamping block.

[0019] The utility model also provides an eccentric butterfly valve, which has the valve anti-loosening assembly described in the utility model.

[0020] The technical solution of the utility model has the following advantages:

[0021] 1. The valve anti-loosening assembly provided by the utility model includes: a pressure ring, on which at least two through holes are penetrated; a fixing piece, which is arranged in parallel with the pressure ring, and a matching notch is arranged on the fixing piece, and the matching notch is aligned with one of the through holes; a matching piece, which penetrates one of the through holes and is connected with the matching notch to connect the pressure ring with the fixing piece; an auxiliary piece, which penetrates the other through hole, and the auxiliary piece is tightly fitted against the fixing piece to apply a pre-tightening tension to the matching piece.

[0022] When installing the valve anti-loosening assembly, first extend the matching piece into the matching through hole, and make the matching piece match and connect with the matching notch, and fix the pressure ring with the fixing piece, then install the auxiliary piece through the through hole, and make the auxiliary piece abut against the fixing piece, and make the auxiliary piece and the pressure ring fixedly connected, so that the fixing piece is pushed by the auxiliary piece, and then the pre-tightening tension is applied to the matching piece. During the long-term use of the valve, the matching piece is subjected to the pre-tightening tension, which can ensure that the pressure ring and the fixing piece are always pressed by the matching piece, and avoid the loosening of the pressure ring and the fixing piece after the long-term use of the valve, resulting in leakage.

[0023] 2. The valve anti-loosening assembly provided by the utility model has an auxiliary component, which is an auxiliary stud. The auxiliary stud is threadedly matched with the through hole, and the end of the auxiliary stud is tightly matched with the fixing component. By adjusting the number of turns of the auxiliary stud screwed into the through hole, the size of the pre-tightening tension applied to the matching component can be controlled, so that the pressure between the pressure ring and the fixing component can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic structural diagram of a valve anti-loosening assembly provided in an embodiment of the utility model.

[0026] Explanation of the accompanying drawings: 1. valve body; 2. valve seat; 3. pressure ring; 4. locking bolt; 5. auxiliary stud; 6. butterfly plate; 7. valve stem; 8. matching notch. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1

[0032] Figure 1 The figure shows a valve anti-loosening assembly provided in this embodiment, which includes a pressure ring 3, a fixing part, a matching part and an auxiliary part.

[0033] The pressure ring 3 is provided with at least two through holes, wherein at least one through hole is provided with a fixing piece, and at least one through hole is provided with a matching piece. The number of fixing pieces and matching pieces to be installed can be determined according to the actual size of the valve and the use requirements. In this embodiment, two through holes are provided on the pressure ring 3, and one fixing piece and one matching piece are provided respectively.

[0034] The fixing piece is arranged in parallel with the pressure ring 3, and a matching notch 8 is arranged on the fixing piece, and the matching notch 8 is arranged in alignment with one of the through holes. After the matching piece passes through one of the through holes, it is matched and connected with the matching notch 8 to connect the pressure ring 3 with the fixing piece. The auxiliary piece passes through the other through hole, and the auxiliary piece abuts against the fixing piece to tightly match, so as to apply a pre-tightening tension to the matching piece.

[0035] In this embodiment, the auxiliary part is an auxiliary stud 5, which is threadedly matched with the through hole, and the end of the auxiliary stud 5 is tightly matched with the fixing part. The matching part is a locking bolt 4, which is threadedly matched with the matching notch 8, and the locking bolt 4 is also threadedly matched with the corresponding through hole. In some other embodiments, the auxiliary part is a clamping column, and a clamping block as a first clamping part is provided on the clamping column, and a clamping groove as a second clamping part is provided on the through hole installed in cooperation with the auxiliary part, and the first clamping part is clamped and fixed with the second clamping part, and multiple second clamping parts are arranged in the through hole along the axial interval, and the size of the pre-tightening tension applied to the matching part is adjusted by clamping the first clamping part with different second clamping parts. In some other embodiments, the first clamping part is a clamping groove, and the second clamping part is a clamping block.

[0036] In this embodiment, the fixing member is set as the valve stem 7, the matching notch 8 is set on the valve stem 7, and the auxiliary stud 5 is in abutment with the valve stem 7. In some other embodiments, the fixing member can also be a butterfly plate 6, the matching notch 8 is set on the butterfly plate 6, and the auxiliary stud 5 is in abutment with the butterfly plate 6. In some other embodiments, the fixing member is the valve stem 7 and the butterfly plate 6, the matching notch 8 is set on the valve stem 7, and the auxiliary stud 5 is in abutment with the butterfly plate 6; or the matching notch 8 is set on the butterfly plate 6, and the auxiliary stud 5 is in abutment with the valve stem 7.

[0037] The butterfly plate 6 is installed in parallel with the pressure ring 3, and the valve stem 7 is fixedly installed between the butterfly plate 6 and the pressure ring 3. The valve seat 2 is sleeved and installed on the pressure ring 3, and the valve seat 2 is installed on the side of the pressure ring 3 facing the fixed part, and the valve seat 2 is arranged between the valve seat 2 and the fixed part. The integral structure composed of the butterfly plate 6, the pressure ring 3 and the valve seat 2 is installed at the valve port of the valve body 1, and rotates under the drive of the valve stem 7 to realize the opening or closing of the valve port. When the valve port is closed, the valve seat 2 is suitable for sealing with the valve body 1.

[0038] The valve anti-loosening assembly provided in this embodiment is to solve the problem of leakage at the valve seat 2 caused by loosening of the locking screws at the valve seat 2 and the pressure ring 3 after the valve is opened and closed multiple times. An auxiliary stud 5 for anti-loosening is installed on the pressure ring 3. After the locking bolt 4 is tightened, the auxiliary stud 5 is screwed in. The auxiliary stud 5 will give a reverse force to the pressure ring 3. After the auxiliary stud 5 and the locking bolt 4 are tightened, they will interact with each other so that the locking bolt 4 is subjected to a continuous pre-tightening tension, thereby preventing the pressure ring 3 from loosening and ensuring that the valve seat 2 will not leak due to the loosening of the pressure ring 3 during long-term use. By adjusting the number of turns of the locking bolt 4 screwed into the matching notch 8 and the number of turns of the auxiliary stud 5 screwed into the corresponding through hole, the compression of the valve seat 2 and the size of the pre-tightening tension on the locking bolt 4 can be adjusted.

[0039] When installing the valve anti-loosening assembly, first extend the locking bolt 4 into the matching through hole, and make the locking bolt 4 match and connect with the matching notch 8, fix the pressure ring 3 and the valve stem 7, and then install the auxiliary stud 5 through another through hole, and make the auxiliary stud 5 abut against the valve stem 7 and fix the auxiliary stud 5 with the pressure ring 3, so that the valve stem 7 is pushed by the auxiliary stud 5, and then the locking bolt 4 is applied with a pre-tightening tension. During the long-term use of the valve, the locking bolt 4 is subjected to the pre-tightening tension, which can ensure that the pressure ring 3 and the valve stem 7 are always kept in a state of being tightened by the locking bolt 4, and avoid the loosening of the pressure ring 3 and the valve stem 7 after long-term use, resulting in leakage.

[0040] Example 2

[0041] This embodiment provides an eccentric butterfly valve having the valve anti-loosening assembly described in Embodiment 1. Specifically, the eccentric butterfly valve in this embodiment is a large-diameter double-eccentric butterfly valve for a water system. Aiming at the problem that the pressure ring of the double-eccentric butterfly valve in a large-diameter water system is easy to loosen and cause internal leakage, the valve anti-loosening assembly described in Embodiment 1 is configured to prevent the pressure ring from loosening, thereby solving the problem of internal leakage caused by the loosening of the pressure ring.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A valve anti-loosening assembly, characterized in that: include: A pressure ring (3) having at least two through holes therethrough; A fixing member is arranged parallel to the pressure ring (3), and a matching notch (8) is arranged on the fixing member, and the matching notch (8) is aligned with one of the through holes; A matching piece, which penetrates through one of the through holes and is connected to the matching notch (8) to connect the pressure ring (3) to the fixing piece; The auxiliary component is arranged through the other through hole, and the auxiliary component abuts against and tightly fits with the fixing component to apply a pre-tightening tension to the matching component.

2. The valve anti-loosening assembly according to claim 1, characterized in that: The auxiliary component is an auxiliary stud (5), the auxiliary stud (5) is threadedly matched with the through hole, and the end of the auxiliary stud (5) is tightly matched with the fixing component.

3. The valve anti-loosening assembly according to claim 1 or 2, characterized in that: The matching piece is a locking bolt (4), and the locking bolt (4) is threadedly matched with the matching notch (8).

4. The valve anti-loosening assembly according to claim 1 or 2, characterized in that: The fixing member is a butterfly plate (6) and / or a valve stem (7).

5. The valve anti-loosening assembly according to claim 4, characterized in that: The butterfly plate (6) is installed in parallel with the pressure ring (3), and the valve stem (7) is fixedly installed between the butterfly plate (6) and the pressure ring (3).

6. The valve anti-loosening assembly according to claim 1 or 2, characterized in that: A valve seat (2) is sleeved and mounted on the pressure ring (3); the valve seat (2) is mounted on a side of the pressure ring (3) facing the fixing member, and the valve seat (2) is arranged between the valve seat (2) and the fixing member.

7. The valve anti-loosening assembly according to claim 6, characterized in that: It also comprises a valve body (1), and the valve seat (2) is suitable for sealingly cooperating with the valve body (1).

8. The valve anti-loosening assembly according to claim 1, characterized in that: The auxiliary component is a clamping column, a first clamping component is arranged on the clamping column, a second clamping component is arranged on the through hole which is installed in cooperation with the auxiliary component, and the first clamping component is clamped and fixed with the second clamping component.

9. The valve anti-loosening assembly according to claim 8, characterized in that: The first clamping member is a clamping block, and the second clamping member is a clamping slot; Or the first clamping member is a clamping slot, and the second clamping member is a clamping block.

10. An eccentric butterfly valve, characterized in that: A valve anti-loosening assembly according to any one of claims 1 to 9.

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