Valve clack supporting spring and check valve

Abstract

According to the valve clack supporting spring and the check valve, on the basis that the original technological structure of a torsional spring is not changed, in the metal wire rolling process, a non-supporting section, first supporting arms, supporting sections and second supporting arms are designed and rolled, and one side of any first supporting arm or second supporting arm is designed to be connected with the non-supporting section; one side of the supporting arm is connected with the non-supporting section, and the other side of the supporting arm is connected with the supporting section, so that the supporting effect on the valve clack is not weakened, the supporting arm is still connected with the non-supporting section when being broken, the non-supporting section sleeves the rotating shaft and is always connected with the rotating shaft, the broken supporting arm can be connected to the rotating shaft and cannot be washed away along with a medium, and equipment is prevented from being damaged; and later maintenance is facilitated.

Description

Technical Field

[0001] This application belongs to the technical field of valves, and particularly relates to a valve flap support spring and a check valve. Background Art

[0002] The wafer type butterfly check valve is widely used in the industrial field due to its small size, simple structure, large flow rate, etc. However, since the valve flap of the butterfly check valve will swing reciprocally under the impact of the medium during operation, the torsion spring support arm of the check valve will break after long-term action. The broken support arm will fall off and flow into the downstream pipeline and equipment with the medium, causing damage to the equipment.

[0003] The patent with application number CN202320373293.2 discloses a high-endurance anti-fracture spring, which includes a number of assembly linkage disc bodies arranged in parallel with each other, and adjacent two are connected by a high-strength endurance spring structure. A number of auxiliary pressure-resistant structures are arranged circumferentially between the assembly linkage disc bodies and around the high-strength endurance spring structure. A sliding elastic pressing structure is arranged between the assembly linkage disc bodies, and the sliding elastic pressing structure is arranged on the inner side of the circumference of the high-strength endurance spring structure. The sliding elastic pressing structure is connected to the high-strength endurance spring structure through a linkage traction rod. However, this spring cannot be used in a torsion application scenario.

[0004] The patent with application number CN201620439249.7 discloses an impactor check valve spring for preventing wear and fracture. Specifically, the spring body is designed into a double-cone structure with large diameters at both ends and a small diameter in the middle. The diameter of the spring body formed by winding the spring wire gradually decreases from the two large ends to the middle, and the cone angle a of the conical spring body formed by the spring wire is 5°. However, this spring still cannot ensure that it will not be washed away by the medium after fracture. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to solve the problem in the prior art that the valve flap support spring cannot ensure that it will not be washed away by the medium after fracture, which may cause damage to the equipment, so as to provide a valve flap support spring and a check valve.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] In the first aspect, the present application provides a valve flap support spring, which includes: formed by winding a single metal wire:

[0008] A first support arm for abutting against the first valve flap of the check valve;

[0009] A second support arm for abutting against the second valve flap of the check valve;

[0010] A third support arm for abutting against the second valve flap;

[0011] The fourth support arm is used to abut against the first valve flap;

[0012] The first support section is spiral and is connected between the first support arm and the second support arm, and is used to provide elastic forces for the first support arm and the second support arm to respectively abut against the first valve flap and the second valve flap;

[0013] The second support section is spiral and is connected between the third support arm and the fourth support arm, and is used to provide elastic forces for the third support arm and the fourth support arm to respectively abut against the first valve flap and the second valve flap;

[0014] A plurality of non-support sections are spiral, annular or arc-shaped, and one end of each of the first support arm, the second support arm, the third support arm and the fourth support arm is connected with the non-support section;

[0015] The first support section, the second support section and the plurality of non-support sections are coaxial.

[0016] In an optional embodiment, the spiral directions of the first support section and the second support section are opposite.

[0017] In an optional embodiment, the non-support sections connected between the second support arm and the third support arm are symmetrical.

[0018] In an optional embodiment, a commutation section is provided between the second support arm and the third support arm, and two ends of the commutation section are respectively connected with a pair of symmetrically arranged non-support sections, and the commutation section is used to connect the non-support sections with opposite spiral directions.

[0019] In an optional embodiment, a common non-support section is connected between the second support arm and the third support arm.

[0020] In an optional embodiment, the first support arm, the second support arm, the third support arm and the fourth support arm are U-shaped or V-shaped.

[0021] In an optional embodiment, the first support arm, the second support arm, the third support arm and the fourth support arm have the same length.

[0022] This application provides a check valve, including: a rotating shaft, a first valve flap and a second valve flap, and the first valve flap and the second valve flap are hinged to the rotating shaft;

[0023] It further includes the valve flap support spring provided in the first aspect, and the valve flap support spring is sleeved on the rotating shaft.

[0024] Second aspect, the present application further provides a valve flap support spring, including those formed by winding a metal wire:

[0025] A first support arm for abutting against the first valve flap of the check valve;

[0026] A second support arm for abutting against the second valve flap of the check valve;

[0027] A first support section, which is spiral, is connected between the first support arm and the second support arm, and is used to provide elastic forces for the first support arm and the second support arm to abut against the first valve flap and the second valve flap respectively;

[0028] A non-support section, which is spiral, annular or in the shape of a major arc, and one end of each of the first support arm and the second support arm is connected to the non-support section;

[0029] The first support section and the non-support section are coaxial.

[0030] The present application further provides a check valve, including: a rotating shaft, a first valve flap and a second valve flap, and the first valve flap and the second valve flap are hinged to the rotating shaft;

[0031] It further includes the valve flap support spring described in the second aspect, and a plurality of the valve flap support springs are sleeved on the rotating shaft.

[0032] The beneficial effects of the present invention are: the valve flap support spring and the check valve of the present invention can, without changing the original process structure of the torsion spring, by designing and winding a non-support section, a first support arm, a support section and a second support arm (or there may also be a third support arm and a fourth support arm) during the metal wire winding process, and designing that one side of any of the first support arm or the second support arm (or the third support arm and the fourth support arm) is connected to the non-support section and the other side is connected to the support section, so that each support arm can not only ensure that the support effect on the valve flap is not weakened, but also ensure that it is still connected to the non-support section when a fracture occurs, and the non-support section is sleeved on the rotating shaft and is always connected to the rotating shaft. Therefore, the fractured support arms can ensure connection to the rotating shaft, will not be washed away by the medium, avoid damage to the equipment, and facilitate later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The technical solutions of the present application will be further described below with reference to the drawings and embodiments.

[0034] Figure 1 It is a schematic structural diagram of the valve flap support spring in Embodiment 1 of the present application;

[0035] Figure 2 It is a schematic structural diagram of the check valve in Embodiment 1 of the present application;

[0036] Figure 3Schematic diagram of the broken state of the valve flap support spring in Embodiment 1 of the present application;

[0037] Figure 4 Schematic diagram of the valve flap support spring structure in Embodiment 2 of the present application.

[0038] The reference numerals in the figure are:

[0039] 1. First support arm; 2. Second support arm; 3. Third support arm; 4. Fourth support arm;

[0040] 5. First support section; 6. Second support section; 7. Non-support section; 8. Commutation section;

[0041] 9. Check valve; 91. First valve flap; 92. Second valve flap; 93. Rotating shaft;

[0042] 100. Valve flap support spring. Detailed implementation manners

[0043] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 thus should not be construed as limiting the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0045] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0046] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0047] Embodiment 1

[0048] This embodiment provides a valve flap support spring 100, as Figure 1 described, including: a first support arm 1, a second support arm 2, a third support arm 3, a fourth support arm 4, a first support section 5, a second support section 6, and several non-support sections 7 formed by winding a metal wire.

[0049] The first support arm 1 and the fourth support arm 4 are used to abut against the first valve flap 91 of the check valve 9; the second support arm 2 and the third support arm 3 are used to abut against the second valve flap 92 of the check valve 9.

[0050] The first support section 5 is helical and is connected between the first support arm 1 and the second support arm 2, and is used to provide elastic forces for the first support arm 1 and the second support arm 2 to abut against the first valve flap 91 and the second valve flap 92 respectively. The second support section 6 is helical and is connected between the third support arm 3 and the fourth support arm 4, and is used to provide elastic forces for the third support arm 3 and the fourth support arm 4 to abut against the first valve flap 91 and the second valve flap 92 respectively.

[0051] The non-support sections 7 are helical, annular or of a major arc shape so as to be sleeved on the rotating shaft 93, and one end of each of the first support arm 1, the second support arm 2, the third support arm 3 and the fourth support arm 4 is connected with a non-support section 7.

[0052] The first support section 5, the second support section 6 and several non-support sections 7 are coaxial, and the function of their coaxial arrangement is that they can be directly sleeved on the rotating shaft 93 of the check valve 9 to complete the installation.

[0053] The valve flap support spring 100 provided in this embodiment, as Figure 2 shown, is used to be installed in the check valve 9. The check valve 9 provided in this embodiment includes: a rotating shaft 93, a first valve flap 91 and a second valve flap 92, and the first valve flap 91 and the second valve flap 92 are hinged to the rotating shaft 93. It further includes a valve flap support spring 100, and the valve flap support spring 100 is sleeved on the rotating shaft 93. Under the action of the valve flap support spring 100, the first support arm 1 and the fourth support arm 4 abut against the first valve flap 91 of the check valve 9; the second support arm 2 and the third support arm 3 abut against the second valve flap 92 of the check valve 9, so that the first valve flap 91 and the second valve flap 92 close the opening of the check valve 9 under normal conditions; when the water flow passes through the check valve 9 in the normal flow direction, the thrust of the water flow will drive the valve flap to rotate around the rotating shaft 93, so that the check valve 9 opens. After the water flow passes through, the valve flap returns to its original position under the elastic force of each support arm and closes the opening. And when the water flow passes through the check valve 9 in the reverse flow direction, the reset valve flap cannot rotate in the reverse direction, realizing the check of the water flow.

[0054] Under the long-term operation of the check valve 9, the first valve flap 91 and the second valve flap 92 are repeatedly opened and closed, and the corresponding first support arm 1, second support arm 2, third support arm 3, and fourth support arm 4 are repeatedly bent, which may cause metal fatigue and lead to the fracture of the support arm. As Figure 3 shown, it shows the situation where some support arms of the valve flap support spring 100 of this embodiment are fractured. It can be seen that the valve flap support spring 100 of this embodiment can, without changing the original process structure of the torsion spring, during the wire winding process, design and wind the first support arm 1, second support arm 2, third support arm 3, fourth support arm 4, first support section 5, second support section 6, and non-support section 7, and design that one side of any support arm is connected to the non-support section 7, and the other side is connected to the first support section 5 or the second support section 6, so that each support arm can not only ensure that the support effect on the valve flap is not weakened, but also ensure that it is still connected to the non-support section 7 when fracture occurs, and the non-support section 7 is sleeved on the rotating shaft 93 and is always connected to the rotating shaft 93. Therefore, the fractured support arms can be ensured to be connected to the rotating shaft 93, will not be washed away by the medium, avoid damaging the equipment, and facilitate later maintenance.

[0055] The non-support section 7 of this embodiment, its principle of action is that during the operation of the valve flap support spring 100 of this embodiment, only the first support section 5 and the second support section 6 provide elastic force, and the non-support section 7 does not participate in providing elastic force, that is, it itself does not need to participate in deformation, which results in its aging degree being much less than that of the first support section 5 and the second support section 6. As Figure 3 shown, the position where the support arm finally fractures is probably at the connection between the first support section 5, the second support section 6 and the support arm, and the other end of the support arm is connected to the rotating shaft 93 through the non-support section 7. Thus, the limit of each fractured support arm is realized, and each fractured support arm is prevented from being washed away by the medium.

[0056] The valve flap support spring 100 provided in this embodiment does not need to modify the structure of the existing check valve, can directly replace the existing torsion spring, and can be replaced in situ. The structure and working state of the check valve are not affected at all, and the upgrade and replacement are extremely convenient. The fractured valve flap support spring 100 and the support arm are convenient to replace. When the equipment is shut down for maintenance, if it is found that any support arm is fractured, only the fractured valve flap support spring 100 and the residual support arm on the rotating shaft 93 of the check valve 9 need to be removed and a new valve flap support spring 100 is replaced. Since there is no fractured part flushing downstream, there is no need to check the location of the fractured support arm along the pipeline, which greatly reduces the maintenance workload and maintenance difficulty.

[0057] In an alternative embodiment, as Figure 1As shown, the spiral directions of the first support section 5 and the second support section 6 are opposite. Under this structural design, the forces at both ends of the non-support section 7 between the first support section 5 and the second support section 6 are in the same direction, so that the two ends of the non-support section 7 will not be distorted due to opposite forces, avoiding metal fatigue.

[0058] In an alternative embodiment, as Figure 1 shown, a pair of symmetrically arranged non-support sections 7 are connected between the non-support sections 7 connecting the second support arm 2 and the third support arm 3. In this embodiment, by arranging symmetric non-support sections 7 between the second support arm 2 and the third support arm 3, the forces on both sides of the valve flap support spring 100 can be made more balanced.

[0059] In an alternative embodiment, as Figure 1 shown, a commutation section 8 is provided between the second support arm 2 and the third support arm 3. The two ends of the commutation section 8 are respectively connected to a pair of symmetrically arranged non-support sections 7. The commutation section 8 is used to connect non-support sections 7 with opposite spiral directions. The valve flap support spring 100 in this embodiment is formed by winding a single wire. In this embodiment, through the transition of the commutation section 8, the spiral direction is changed during the winding process to obtain two connected non-support sections 7 with opposite spiral directions.

[0060] It can be understood that a common non-support section 7 can also be connected between the second support arm 2 and the third support arm 3 to reduce the length of the wire required.

[0061] In an alternative embodiment, as Figure 1 shown, the first support arm 1, the second support arm 2, the third support arm 3, and the fourth support arm 4 are U-shaped or V-shaped. The U-shaped or V-shaped shapes are symmetric, with evenly distributed forces, and are easy to implement in terms of technology, which is beneficial for the actual production of the solution.

[0062] In an alternative embodiment, as Figure 1 shown, the first support arm 1, the second support arm 2, the third support arm 3, and the fourth support arm 4 have the same length, which can provide a more evenly distributed supporting force for the first valve flap 91 and the second valve flap 92 of the check valve 9.

[0063] In an alternative embodiment, the non-support section 7 winds at least half a turn or more during the winding process to enable sleeving on the rotating shaft 93, preferably winding 1 to 6 turns.

[0064] In an alternative embodiment, the total length of the valve flap support spring 100 in this embodiment is 15 cm, the length of the support arm is 9.5 cm, the coil diameter is 2.36 cm, and it is formed by winding a steel wire with a diameter of 0.28 cm. The outer diameter of the check valve 9 is 24.5 cm.

[0065] Embodiment 2

[0066] This embodiment provides a valve flap support spring 100, as Figure 4 shown, including: a first support arm 1, a second support arm 2, a first support section 5 and two non-support sections 7 formed by winding a metal wire.

[0067] The first support arm 1 is used to abut against the first valve flap 91 of the check valve 9; the second support arm 2 is used to abut against the second valve flap 92 of the check valve 9.

[0068] The first support section 5 is spiral and is connected between the first support arm 1 and the second support arm 2, and is used to provide elastic forces for the first support arm 1 and the second support arm 2 to abut against the first valve flap 91 and the second valve flap 92 respectively. The non-support section 7 is spiral, annular or in the shape of a major arc, and one end of each of the first support arm 1 and the second support arm 2 is connected with a non-support section 7.

[0069] The first support section 5, the second support section 6 and several non-support sections 7 are coaxial, and the function of their coaxial arrangement is to be directly sleeved on the rotating shaft 93 of the check valve 9 to complete the installation.

[0070] The valve flap support spring 100 provided in this embodiment is different from that in Embodiment 1 in that the number of support arms and the number of support sections are reduced, and the overall length is reduced, so as to be installed in a smaller check valve 9. At the same time, it is also convenient to selectively install one or more valve flap support springs 100 of this embodiment according to the specific size of the check valve 9. For example, 1, 2 or 3 valve flap support springs 100 are sleeved on the rotating shaft 93 of the check valve 9, or more than 4 valve flap support springs 100 are sleeved when the size of the check valve 9 is relatively large.

[0071] For the valve flap support spring 100 of this embodiment, each support arm can not only ensure that the support effect on the valve flap is not weakened, but also ensure that it is still connected to the non-support section 7 when a fracture occurs. The non-support section 7 is sleeved on the rotating shaft 93 and is always connected to the rotating shaft 93. Therefore, each fractured support arm can be ensured to be connected to the rotating shaft 93, will not be washed away by the medium, avoid damaging the equipment, and facilitate later maintenance.

[0072] In an optional embodiment, the total length of the valve flap support spring 100 of this embodiment is 7 cm, the length of the support arm is 9.5 cm, the coil diameter is 2.36 cm, and it is formed by winding a steel wire with a diameter of 0.28 cm. The outer diameter of the check valve 9 is 24.5 cm.

[0073] Taking the ideal embodiment according to the present application as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A valve flap support spring, characterized in that, Comprising those formed by coiling a metal wire: A first support arm (1) for abutting against a first valve flap (91) of a check valve (9); A second support arm (2) for abutting against a second valve flap (92) of the check valve (9); A third support arm (3) for abutting against the second valve flap (92); A fourth support arm (4) for abutting against the first valve flap (91); A first support section (5), which is helical, connected between the first support arm (1) and the second support arm (2) for providing elastic forces for the first support arm (1) and the second support arm (2) to respectively abut against the first valve flap (91) and the second valve flap (92); A second support section (6), which is helical, connected between the third support arm (3) and the fourth support arm (4) for providing elastic forces for the third support arm (3) and the fourth support arm (4) to respectively abut against the first valve flap (91) and the second valve flap (92); A plurality of non-support sections (7), which are helical, annular or in the shape of a major arc, and one end of each of the first support arm (1), the second support arm (2), the third support arm (3) and the fourth support arm (4) is connected to the non-support section (7); The first support section (5), the second support section (6) and the plurality of non-support sections (7) are coaxial.

2. The valve flap support spring according to claim 1, wherein The helical directions of the first support section (5) and the second support section (6) are opposite.

3. The valve flap support spring according to claim 2, characterized in that, The non-support sections (7) connected between the second support arm (2) and the third support arm (3) are symmetrical.

4. The valve flap support spring according to claim 3, characterized in that, A commutation section (8) is provided between the second support arm (2) and the third support arm (3), and two ends of the commutation section (8) are respectively connected to a pair of symmetrically arranged non-support sections (7), and the commutation section (8) is used for connecting the non-support sections (7) with opposite helical directions.

5. The valve flap support spring according to claim 2, characterized in that, A common non-support section (7) is connected between the second support arm (2) and the third support arm (3).

6. The valve flap support spring according to any one of claims 1-5, characterized in that, The first support arm (1), the second support arm (2), the third support arm (3) and the fourth support arm (4) are U-shaped or V-shaped.

7. The valve flap support spring according to any one of claims 1-5, characterized in that, The first support arm (1), the second support arm (2), the third support arm (3) and the fourth support arm (4) have the same length.

8. A valve flap support spring, characterized in that, Comprising those formed by coiling a metal wire: A first support arm (1) for abutting against a first valve flap (91) of a check valve (9); A second support arm (2) for abutting against a second valve flap (92) of the check valve (9); A first support section (5), which is helical, connected between the first support arm (1) and the second support arm (2) for providing elastic forces for the first support arm (1) and the second support arm (2) to respectively abut against the first valve flap (91) and the second valve flap (92); A non-support section (7), which is helical, annular or in the shape of a major arc, and one end of each of the first support arm (1) and the second support arm (2) is connected to the non-support section (7); The first support section (5) and the non-support section (7) are coaxial.

9. A check valve, characterized in that, Comprising: A rotating shaft (93), a first valve flap (91) and a second valve flap (92), wherein the first valve flap (91) and the second valve flap (92) are hinged to the rotating shaft (93); It further includes a valve flap support spring (100) according to any one of claims 1-7, and the valve flap support spring (100) is sleeved on the rotating shaft (93).

10. A check valve, characterized in that, Comprising: A rotating shaft (93), a first valve flap (91) and a second valve flap (92), wherein the first valve flap (91) and the second valve flap (92) are hinged to the rotating shaft (93); It further includes a plurality of valve flap support springs (100) according to claim 8, and the plurality of valve flap support springs (100) are sleeved on the rotating shaft (93).

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