Outward-leakage-free swing check valve

Abstract

The utility model discloses a leakage-free swing check valve, and relates to the field of valves. The leakage-free swing check valve comprises a valve body, a valve clack, a rocker, a pin shaft, a connecting piece and a shaft sleeve. The pin shaft is arranged in the valve body, the rocker is connected to the pin shaft, and the connecting piece is arranged in the valve body. The pin shaft, the connecting piece and the shaft sleeve are arranged in the valve body, the rocker and the pin shaft are fixed through the connecting piece, leakage of fluid media can be avoided, the shaft sleeve is arranged between the pin shaft and the valve body, the low-friction performance of the shaft sleeve is utilized, rotating friction of the pin shaft driven by the rocker is reduced, opening resistance of the valve clack is reduced, and safety of the valve clack is improved. And the reliability of the check valve in the working stage is ensured.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a non-leakage swing check valve. Background Art

[0002] The swing check valve equipment mainly plays the role of circulating or reverse cutting off the medium in the pipeline. At present, the installation of the valve disc in the opening and closing element is mostly done by fixing the valve disc and the rocker, and the rocker is installed on the valve body through the rotation of the pin shaft. The rocker is sleeved on the pin shaft, and the pin shaft and the valve body are fixed by a connecting piece. The connecting piece is inserted into the pin shaft from the outside to the inside along the axial direction of the pin shaft, so that the pin shaft is close to contact in the valve body, and the outer edge of the connecting piece is limited to the valve body, so that the pin shaft is fixed on the valve body. In this structure, when the valve disc is opened, the fluid medium is easy to leak out from the connection between the pin shaft and the connecting piece, which affects the opening resistance of the valve disc and reduces the reliability of the use of the check valve. Utility Model Content

[0003] In order to solve the technical problems raised by the above background technology, the utility model provides a non-leakage swing check valve, comprising:

[0004] A valve body is provided with a flow channel;

[0005] A pin shaft is arranged in the valve body;

[0006] A rocker connected to the pin;

[0007] A connecting piece, arranged in the valve body, the rocker arm and the pin shaft are fixedly connected via the connecting piece, and the connecting piece and the pin shaft are arranged correspondingly;

[0008] A valve flap, fixedly connected to an end of the rocker away from the pin shaft;

[0009] And a shaft sleeve, the shaft sleeve is sleeved on the outside of the pin shaft, the pin shaft and the shaft sleeve are relatively rotatably connected, and the outer wall surface of the shaft sleeve is connected to the valve body.

[0010] Optionally, the valve body is provided with a first installation cavity and a second installation cavity which are relatively spaced apart from each other, two pin shafts are provided, two sleeves are provided, the two sleeves are respectively provided in the first installation cavity and the second installation cavity, and the two pin shafts are respectively provided in the two sleeves.

[0011] Optionally, the rocker is provided with an avoidance cavity and a through cavity, the avoidance cavity and the through cavity are connected, the end of the pin shaft is suitable for being installed in the through cavity, and the length of the avoidance cavity along the extension of the through cavity is greater than the axial length of the pin shaft;

[0012] There are two connecting members, and any one of the connecting members passes through the rocker and extends into the pin shaft to fix the rocker and the pin shaft, and the connecting member is configured as a fastener.

[0013] Optionally, when the medium in the flow channel acts on the valve flap and the rocker to rotate, the rotation trajectory of the connecting member is suitable for being arranged to avoid the inner wall of the valve body.

[0014] Optionally, the first installation cavity and the second installation cavity are configured as rotating body cavities, the first installation cavity and the second installation cavity are coaxially arranged, and the axial extension direction of the first installation cavity is arranged parallel to the horizontal plane.

[0015] Optionally, an anti-loosening gasket is further included, and the anti-loosening gasket is arranged between the shaft sleeve and the connecting member, and the connecting section of the connecting member is suitable for passing the anti-loosening gasket.

[0016] Optionally, the rocker arm is disposed between the two shaft sleeves, and two sides of the rocker arm are respectively disposed in limiting contact with the two shaft sleeves.

[0017] Optionally, a fixing assembly is also included, which is used to connect the valve flap and the rocker; the fixing assembly includes a washer and a nut, the mounting side of the valve flap passes through the rocker, the locking end of the nut is threadedly connected to the mounting side of the valve flap, and the washer is arranged between the rocker and the nut.

[0018] Optionally, the fixing assembly further comprises an open latch, wherein the open latch is inserted through the nut and is plugged and connected to the installation side of the valve disc.

[0019] Optionally, a seat ring is provided in the valve body, the seat ring is arranged in the flow channel, the seat ring is configured with a check port, and the check side of the valve disc and the check port are arranged in a conforming correspondence; and / or

[0020] The valve body is provided with a lifting ear, and the lifting ear is detachably connected to the outer wall of the valve body through a thread.

[0021] The technical solution provided by the utility model has the following advantages:

[0022] The utility model provides a leakage-free swing check valve, including a valve body, a valve disc, a rocker, a pin shaft, a connecting piece and a sleeve. The pin shaft, the connecting piece and the sleeve are built into the valve body, and the rocker and the pin shaft are fixed by the connecting piece, so that leakage of the fluid medium can be avoided. The sleeve is arranged between the pin shaft and the valve body to utilize the low friction performance of the sleeve to reduce the rotational friction of the pin shaft driven by the rocker, which is beneficial to reducing the opening resistance of the valve disc and ensuring the reliability of the check valve in the working stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 A structural schematic diagram of a non-leakage swing check valve provided by the utility model;

[0025] Figure 2 A cross-sectional schematic diagram of a non-leakage swing check valve provided by the utility model;

[0026] Figure 3 A partial schematic diagram of a non-leakage swing check valve provided by the utility model;

[0027] Figure 4 A schematic diagram of the structure of the valve body in the non-leakage swing check valve provided by the utility model;

[0028] Figure 5 A schematic cross-sectional view of a valve body in a non-leakage swing check valve provided by the utility model;

[0029] Figure 6 A schematic diagram of the structure of a rocker in a non-leakage swing check valve provided by the utility model;

[0030] Figure 7 A cross-sectional schematic diagram of a rocker in a non-leakage swing check valve provided by the utility model;

[0031] Description of reference numerals:

[0032] 1-valve body; 11-flow channel; 12-valve disc; 13-first installation cavity; 14-second installation cavity; 15-seat ring; 16-lifting ear;

[0033] 21-pin shaft; 22-rocker; 221-avoidance cavity; 222-through cavity; 23-connector; 24-shaft sleeve; 25-anti-loosening gasket;

[0034] 31-washer; 32-nut; 33-split latch. DETAILED DESCRIPTION

[0035] 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.

[0036] 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 a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] 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.

[0038] 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.

[0039] Example 1

[0040] This embodiment provides a non-leakage swing check valve. Figures 1 to 7 The non-leakage swing check valve comprises: a valve body 1, a valve disc 12, a rocker 22, a pin 21, a connecting piece 23 and a sleeve 24; the pin 21 is arranged in the valve body 1, the rocker 22 is connected to the pin 21, the connecting piece 23 is arranged in the valve body 1, the rocker 22 and the pin 21 are fixedly connected through the connecting piece 23, the connecting piece 23 and the pin 21 are arranged correspondingly, the valve disc 12 is fixedly connected to the end of the rocker 22 away from the pin 21, the sleeve 24 is sleeved on the outside of the pin 21, the pin 21 and the sleeve 24 are connected for relative rotation, and the outer wall of the sleeve 24 is connected to the valve body 1.

[0041] See also Figure 2 The non-leakage swing check valve also includes a fixing assembly, which is used to connect the valve disc 12 and the rocker 22; the fixing assembly includes a gasket 31 and a nut 32, the mounting side of the valve disc 12 passes through the rocker 22, the locking end of the nut 32 is threadedly connected to the mounting side of the valve disc 12, and the gasket 31 is arranged between the rocker 22 and the nut 32.

[0042] In some embodiments, see Figure 2The fixing assembly further includes an open latch 33, which is inserted into the nut 32 and inserted into the mounting side of the valve disc 12. The open latch 33 strengthens the radial contact force between the nut 32 and the washer 31 and the mounting side of the valve disc 12 to improve the connection strength.

[0043] See also Figure 5 The valve body 1 is provided with a flow channel 11; a seat ring 15 is provided in the valve body 1, the seat ring 15 is arranged in the flow channel 11, the seat ring 15 is provided with a check port, and the check side of the valve disc 12 and the check port are conformally arranged correspondingly.

[0044] In the examples, see Figures 1 to 4 A first mounting cavity 13 and a second mounting cavity 14 which are relatively spaced apart are provided in the valve body 1, two pin shafts 21 are provided, and two shaft sleeves 24 are provided. The two shaft sleeves 24 are respectively provided in the first mounting cavity 13 and the second mounting cavity 14, and the two pin shafts 21 are respectively provided in the two shaft sleeves 24.

[0045] In a specific implementation, the first installation cavity 13 and the second installation cavity 14 are symmetrically arranged in the valve body 1 .

[0046] In some embodiments, the first installation cavity 13 and the second installation cavity 14 are configured as rotating body cavities, the first installation cavity 13 and the second installation cavity 14 are coaxially configured, and the axial extension direction of the first installation cavity 13 is configured parallel to the horizontal plane.

[0047] In this embodiment, see Figure 3 There are two connecting pieces 23 and two pin shafts 21. The two connecting pieces 23 are respectively provided with rocker arms 22 and extend into the pin shaft 21 to fix the rocker arms 22 and the pin shaft 21. The connecting piece 23 is provided as a fastener, such as a bolt. During the opening and closing process of the valve, the pin shaft 21, the rocker arms 22 and the connecting piece 23 rotate synchronously, and the pin shaft 21 and the sleeve 24 rotate relatively.

[0048] It should be noted that when the medium in the flow channel 11 acts on the valve disc 12 and the rocker 22 to rotate, the rotation trajectory of the connecting member 23 is suitable for avoiding the inner wall of the valve body 1.

[0049] In this embodiment, see Figure 1 , Figure 3 , Figure 6 and Figure 7The rocker 22 is provided with an avoidance cavity 221 and a through cavity 222. The avoidance cavity 221 and the through cavity 222 are connected and arranged. The end of the pin 21 is suitable for being installed in the through cavity 222. The length of the avoidance cavity 221 along the extension of the through cavity 222 is greater than the axial length of the pin 21. The rocker 22 is provided with a through hole structure suitable for the connection member 23 to pass through, and the pin 21 is provided with a blind hole structure suitable for the connection member 23 to pass through. The through cavity 222 is provided on the side of the rocker 22 close to the pin 21, and the pin 21 is installed in the through cavity 222. Among them, the distance between the first installation cavity 13 and the second installation cavity 14 is equal to the extension length of the through cavity 222.

[0050] In one embodiment, the pin 21 may be made of a material with a low friction coefficient to minimize its rotational friction resistance.

[0051] In some embodiments, the non-leakage swing check valve further includes an anti-loosening gasket 25, see Figure 3 The anti-loosening gasket 25 is arranged between the shaft sleeve 24 and the connecting member 23, and the connecting section of the connecting member 23 is suitable for passing the anti-loosening gasket 25.

[0052] Furthermore, the anti-loosening gasket 25 is configured as a bending structure, and the connecting member 23 and the rocker 22 are fitted with the bending structure to increase the limiting contact area between the structures and ensure the connection strength between the rocker 22 and the pin 21.

[0053] In this embodiment, see Figure 1 and Figure 3 The rocker 22 is disposed between the two shaft sleeves 24 , and the two sides of the rocker 22 are respectively disposed in a limited position and abutted against the two shaft sleeves 24 .

[0054] In some embodiments, see Figure 1 and Figure 2 , 16 lifting ears are provided on the valve body 1, and the 16 lifting ears are detachably connected to the outer wall of the valve body 1 by threads. The 16 lifting ears can be used to connect the lifting mechanism of the external device to transport the mobile check valve.

[0055] The leakage-free swing check valve provided in this embodiment can prevent leakage of fluid medium by embedding the pin 21, the connecting piece 23 and the sleeve 24 in the valve body 1, and fixing the rocker 22 and the pin 21 by the connecting piece 23. The sleeve 24 is arranged between the pin 21 and the valve body 1 to utilize the low friction performance of the sleeve 24 to reduce the rotational friction of the pin 21 driven by the rocker 22, which is beneficial to reducing the opening resistance of the valve disc 12 and ensuring the reliability of the check valve in the working stage.

[0056] The check valve designed in this embodiment has a first installation cavity 13 and a second installation cavity 14 of the assembly pin 21 disposed in the valve body 1, and a valve flap 12 rotatably disposed in the valve body 1 is disposed on a side close to the check port in the middle section of the flow channel 11. The overall design is a non-leakage structure, which can effectively avoid the risk of medium leakage outside the valve.

[0057] The utility model provides a non-leakage swing check valve, and its assembly method is as follows:

[0058] Install the two sleeves 24 into the first installation cavity 13 and the second installation cavity 14 respectively, fix the valve disc 12 to one end of the rocker 22 through the fixing assembly, align the two sides of the through cavity 222 at the other end of the rocker 22 with the first installation cavity 13 and the second installation cavity 14, place the two pins 21 in the coaxial direction of the through cavity 222 through the avoidance cavity 221 respectively, and guide the two pins 21 into the sleeves 24 in the first installation cavity 13 and the sleeves 24 in the second installation cavity 14 through the through cavity 222; thereafter, assemble the rocker 22 and the pin 21 through the connecting piece 23 and the anti-loosening gasket 25 to achieve structural fixation.

[0059] 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 of the utility model.

Claims

1. A non-leakage swing check valve, characterized in that: include: A valve body (1) is provided with a flow channel (11); A pin shaft (21) is arranged in the valve body (1); A rocker (22) connected to the pin (21); A connecting member (23) is arranged in the valve body (1), the rocker (22) and the pin shaft (21) are fixedly connected via the connecting member (23), and the connecting member (23) and the pin shaft (21) are arranged correspondingly; A valve flap (12) is fixedly connected to an end of the rocker (22) away from the pin (21); and a shaft sleeve (24), wherein the shaft sleeve (24) is sleeved on the outside of the pin shaft (21), the pin shaft (21) and the shaft sleeve (24) are connected for relative rotation, and the outer wall surface of the shaft sleeve (24) is connected to the valve body (1).

2. The non-leakage swing check valve according to claim 1, characterized in that: The valve body (1) is provided with a first installation cavity (13) and a second installation cavity (14) which are arranged at a relative interval, two pin shafts (21) are provided, and two shaft sleeves (24) are provided. The two shaft sleeves (24) are respectively arranged in the first installation cavity (13) and the second installation cavity (14), and the two pin shafts (21) are respectively arranged in the two shaft sleeves (24).

3. The non-leakage swing check valve according to claim 2, characterized in that: The rocker (22) is provided with an avoidance cavity (221) and a through cavity (222); the avoidance cavity (221) and the through cavity (222) are connected to each other; the end of the pin shaft (21) is suitable for being installed in the through cavity (222); the length of the avoidance cavity (221) along the extension of the through cavity (222) is greater than the axial length of the pin shaft (21); Two connecting members (23) are provided, and any one of the connecting members (23) passes through the rocker (22) and extends into the pin shaft (21) to fixedly connect the rocker (22) and the pin shaft (21), and the connecting member (23) is provided as a fastener.

4. The non-leakage swing check valve according to claim 3, characterized in that: When the medium in the flow channel (11) acts on the valve flap (12) and the rocker (22) to rotate, the rotation track of the connecting member (23) is suitable for avoiding the inner wall of the valve body (1).

5. The non-leakage swing check valve according to claim 2, characterized in that: The first installation cavity (13) and the second installation cavity (14) are arranged as rotating body cavities, the first installation cavity (13) and the second installation cavity (14) are arranged coaxially, and the axial extension direction of the first installation cavity (13) is arranged parallel to the horizontal plane.

6. The non-leakage swing check valve according to claim 1, characterized in that: It also includes an anti-loosening gasket (25), which is arranged between the shaft sleeve (24) and the connecting member (23), and the connecting section of the connecting member (23) is suitable for passing the anti-loosening gasket (25).

7. The non-leakage swing check valve according to claim 2, characterized in that: The rocker (22) is arranged between the two shaft sleeves (24), and two sides of the rocker (22) are respectively arranged in limiting contact with the two shaft sleeves (24).

8. The non-leakage swing check valve according to any one of claims 1 to 7, characterized in that: It also includes a fixing assembly, which is used to connect the valve disc (12) and the rocker (22); the fixing assembly includes a washer (31) and a nut (32), the mounting side of the valve disc (12) passes through the rocker (22), the locking end of the nut (32) is threadedly connected to the mounting side of the valve disc (12), and the washer (31) is arranged between the rocker (22) and the nut (32).

9. The non-leakage swing check valve according to claim 8, characterized in that: The fixing assembly also includes an open latch (33), which is inserted into and penetrates the nut (32) and is inserted and connected to the installation side of the valve flap (12).

10. The non-leakage swing check valve according to any one of claims 1 to 7, characterized in that: The valve body (1) is provided with a seat ring (15), the seat ring (15) is arranged in the flow channel (11), the seat ring (15) is provided with a check opening, and the check side of the valve disc (12) and the check opening are arranged in a conforming correspondence; and / or The valve body (1) is provided with a lifting ear (16) which is detachably connected to the outer wall of the valve body (1) via a thread.

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