Flange single-segment swash plate type check valve

Abstract

The utility model relates to valve technical field especially is involved in a kind of flange single petal inclined disc type check valve, including valve body, valve seat, valve petal and rotating shaft, the valve seat is fixed in valve body, the valve petal is set in valve body for with valve seat sealing cooperation by rotating shaft rotation, the rotating shaft is installed in the inside of valve body by fixed support, the fixed support includes respectively the first support and the second support of being set on the inner wall of the both sides of valve body, the rotating shaft includes main shaft, first connecting shaft and second connecting shaft, the valve petal is equipped with rotating support, the main shaft is connected rotationally by penetrating rotating support, the first connecting shaft is inserted with the first support and is matched, the second connecting shaft is inserted with the second support and is matched, the main shaft one end is inserted with the first connecting shaft and is matched another end with the second connecting shaft and is matched, the utility model is by adding main shaft as the core load-bearing component of valve petal rotation, improves wear resistance, guarantees the sealing property of check valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a flanged single-disc swashplate check valve. Background Technology

[0002] A check valve is an automatic valve that opens and closes by relying on the flow pressure of the medium itself to drive the valve disc to open. When the medium flows backward, the valve disc automatically closes under the action of reverse pressure, its own weight, or spring force, thus allowing the medium to flow in only one direction. It is one of the most basic safety protection components in a pipeline system.

[0003] Check valves are classified into lift check valves and swing check valves based on the movement of their discs. Swashplate check valves are a type of swing check valve. In swashplate check valves, the disc is angled and can rotate around an axis. The internal rotating axis of the swashplate check valve serves as the fulcrum for the disc's rotation. Especially when the disc is open, it needs to support the weight of the entire disc and the pressure of the medium. In existing technologies, the rotating axis is usually connected to the valve body by a bracket. There is no reinforcement or wear-resistant structure between the bracket and the rotating axis. Under long-term operation, the rotating axis becomes misaligned due to wear, resulting in the disc not closing tightly enough and affecting the sealing performance of the check valve. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a flanged single-disc swashplate check valve. This invention improves wear resistance and ensures the sealing performance of the check valve by adding a main shaft as the core load-bearing component for valve disc rotation.

[0005] The technical solution adopted by this utility model is as follows: A flanged single-disc swashplate check valve includes a valve body, a valve seat, a valve disc, and a rotating shaft. The valve seat is fixed in the valve body, and the valve disc is rotatably mounted in the valve body via the rotating shaft for sealing with the valve seat. The rotating shaft is installed inside the valve body via a fixed bracket. The fixed bracket includes a first bracket and a second bracket respectively disposed on the inner walls of both sides of the valve body. The rotating shaft includes a main shaft, a first connecting shaft, and a second connecting shaft. The valve disc is provided with a rotating bracket, and the main shaft passes through the rotating bracket to form a rotatable connection. The first connecting shaft is inserted into the first bracket, and the second connecting shaft is inserted into the second bracket. One end of the main shaft is inserted into the first connecting shaft, and the other end is inserted into the second connecting shaft.

[0006] The spindle is axially inserted with a core, and each end of the core has a tapered surface. The ends of the first connecting shaft and the second connecting shaft that extend into the spindle are both provided with tapered grooves that are adapted to the tapered surfaces.

[0007] The first bracket has a first mounting cavity, and a first elastic component is provided in the first mounting cavity. The first elastic component includes a first spring, a first sliding plate, and a first threaded pin. The first threaded pin is threadedly connected to the first bracket. The first spring is sleeved on the first threaded pin and is disposed between the inner wall of the first mounting cavity and the first sliding plate. The end of the first bracket is also threadedly connected to a first end cap for abutting against the first sliding plate. The first connecting shaft is inserted into the first end cap and abuts against the first sliding plate.

[0008] The outer peripheral wall of the first connecting shaft extends to form a first abutting ring that abuts against the rotating bracket. The diameter of the first abutting ring is larger than that of the rotating bracket, and there is a first movable gap between the first abutting ring and the first bracket.

[0009] The second bracket has a second mounting cavity, and a second elastic component is provided in the second mounting cavity. The second elastic component includes a second spring, a second sliding plate, and a second threaded pin. The second threaded pin is threadedly connected to the second bracket. The second spring is sleeved on the second threaded pin and is abutted between the inner wall of the second mounting cavity and the second sliding plate. The end of the second bracket is also threadedly connected to a second end cap for abutting against the second sliding plate. The second connecting shaft is inserted into the second end cap and abuts against the second sliding plate.

[0010] The outer peripheral wall of the second connecting shaft extends to a second abutment ring, the diameter of which is larger than that of the rotating bracket, and there is a second movable gap between the second abutment ring and the second bracket, the second movable gap being narrower than the first movable gap. The outer edge of the main shaft near the second connecting shaft extends to an operating ring that abuts against the rotating bracket and the second abutment ring, the diameter of which is also larger than that of the rotating bracket.

[0011] The valve body includes a first valve body and a second valve body connected to the first valve body via a fastening assembly. The valve seat is clamped and fixed between the first valve body and the second valve body, and the valve seat is also connected to the second valve body via a first fastener. The valve disc is also connected to a pressure cap via a second fastener. A valve disc sealing ring for sealing cooperation with the valve seat is clamped between the pressure cap and the valve disc.

[0012] The beneficial effects of this utility model are as follows: By adding a main shaft as the core load-bearing component for valve disc rotation, it directly bears the frictional loss during rotation, significantly improving the overall wear resistance of the rotating shaft; the split plug-in structure not only facilitates assembly and subsequent maintenance, but also allows for the individual replacement of the main shaft or connecting shaft after wear, reducing maintenance costs; at the same time, the plug-in cooperation between the connecting shafts on both sides and the bracket forms a stable double-support structure, enhancing the installation strength and operational stability of the rotating shaft, effectively preventing the rotating shaft from becoming misaligned under long-term operation, thereby ensuring the sealing accuracy of the valve disc and valve seat, and significantly improving the sealing performance and service life of the check valve. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0014] Figure 1 This is a cross-sectional view of the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a partial cross-sectional view of the rotation axis in this utility model; Figure 4 for Figure 3 A magnified view of the portion corresponding to the first support; Figure 5 for Figure 3 A magnified view of the portion corresponding to the second support; In the diagram, 1-valve seat, 2-valve disc, 3-first bracket, 4-second bracket, 5-main shaft, 6-first connecting shaft, 7-second connecting shaft, 8-rotating bracket, 9-shaft core, 10-conical surface, 11-conical groove, 12-first mounting cavity, 13-first spring, 14-first sliding plate, 15-first threaded pin, 16-first end cap, 17-first abutment ring, 18-first movable clearance, 19-second mounting cavity, 20-second spring, 21-second sliding plate, 22-second threaded pin, 23-second end cap, 24-second abutment ring, 25-second movable clearance, 26-operating ring, 27-first valve body, 28-fastening assembly, 29-second valve body, 30-first fastener, 31-second fastener, 32-pressure cap, 33-valve disc sealing ring. Detailed Implementation

[0015] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0016] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0017] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0018] like Figures 1 to 5 As shown in the figure, an embodiment of the present invention is disclosed, comprising a flanged single-disc swashplate check valve, including a valve body, a valve seat 1, a valve disc 2, and a rotating shaft. The valve seat 1 is fixed within the valve body, and the valve disc 2 is rotatably mounted within the valve body via the rotating shaft for sealing engagement with the valve seat 1. The rotating shaft is installed inside the valve body via a fixed bracket, which includes a first bracket 3 and a second bracket 4 respectively disposed on the inner walls of both sides of the valve body. The rotating shaft includes a main shaft 5, a first connecting shaft 6, and a second connecting shaft 7. The valve disc 2 is provided with a rotating bracket 8, and the main shaft 5 passes through the rotating bracket 8 to form a rotatable connection. The first connecting shaft 6 is inserted into the first bracket 3, and the second connecting shaft 7 is inserted into the second bracket 4. One end of the main shaft 5 is inserted into the first connecting shaft 6, and the other end is inserted into the second connecting shaft 7.

[0019] The beneficial effects of this design are as follows: by adding a main shaft as the core load-bearing component for valve disc rotation, it directly bears the frictional losses during rotation, significantly improving the overall wear resistance of the rotating shaft; the split plug-in structure not only facilitates assembly and subsequent maintenance, but also allows for the individual replacement of the main shaft or connecting shaft after wear, reducing maintenance costs; at the same time, the plug-in fit between the connecting shafts on both sides and the bracket forms a stable double-support structure, enhancing the installation strength and operational stability of the rotating shaft, effectively preventing the rotating shaft from becoming misaligned under long-term operation, thereby ensuring the sealing accuracy of the valve disc and valve seat, and significantly improving the sealing performance and service life of the check valve.

[0020] Further, a core 9 is axially inserted into the center of the main shaft 5, and a tapered surface 10 is provided at each end of the core 9. The first connecting shaft 6 and the second connecting shaft 7 are each provided with a tapered groove 11 that matches the tapered surface 10 at one end of their extension into the main shaft 5.

[0021] The beneficial effects of this design are as follows: the shaft core that abuts against the first and second connecting shafts is set up, and the automatic centering of each component of the rotating shaft is achieved by the cooperation of the conical surface and the conical groove. This accurately ensures the coaxiality of the main shaft and the two connecting shafts, eliminates assembly gaps, further enhances the connection strength and running stability of the rotating shaft, reduces radial runout and uneven wear during rotation, and more reliably prevents the rotating shaft from becoming misaligned after long-term operation.

[0022] Further, the first bracket 3 has a first mounting cavity 12, and a first elastic component is provided in the first mounting cavity 12. The first elastic component includes a first spring 13, a first sliding plate 14, and a first threaded pin 15. The first threaded pin 15 is threadedly connected to the first bracket 3. The first spring 13 is sleeved on the first threaded pin 15, and the first spring 13 is abutted between the inner wall of the first mounting cavity 12 and the first sliding plate 14. The end of the first bracket 3 is also threadedly connected to a first end cap 16 for abutting against the first sliding plate 14. The first connecting shaft 6 is inserted into the first end cap 16 and abuts against the first sliding plate 14.

[0023] The beneficial effects of this design are as follows: the first threaded pin provides guidance and positioning for the spring, and the first end cap, which is connected by a thread, abuts against the sliding plate, causing the first connecting shaft to abut against the sliding plate. The preload of the spring provides axial support for the rotating shaft, which can automatically compensate for the axial wear gap generated by long-term use of the main shaft and the connecting shaft, and effectively prevent axial movement of the rotating shaft. At the same time, the elastic component can absorb the vibration generated by the impact of the medium, reduce the impact damage of the rotating parts, and further improve the running stability and anti-skewness capability of the rotating shaft.

[0024] Further, the outer peripheral wall of the first connecting shaft 6 extends to form a first abutting ring 17 that abuts against the rotating bracket 8. The diameter of the first abutting ring 17 is larger than that of the rotating bracket 8, and there is a first movable gap 18 between the first abutting ring 17 and the first bracket 3.

[0025] The beneficial effects of this design are as follows: it can effectively limit the axial movement of the valve disc under the impact of the medium, and avoid additional axial friction and wear between the valve disc and the rotating shaft; at the same time, the first movable gap is reserved between the first abutment ring and the first bracket, which not only ensures the normal rotational freedom of the rotating shaft, but also can cooperate with the aforementioned elastic component to realize automatic compensation of axial wear gap. The first movable gap is also used to separate the first connecting shaft from the main shaft when the first abutment ring is moved, so as to realize quick disassembly and assembly.

[0026] Further, the second bracket 4 has a second mounting cavity 19, and a second elastic component is provided in the second mounting cavity 19. The second elastic component includes a second spring 20, a second sliding plate 21, and a second threaded pin 22. The second threaded pin 22 is threadedly connected to the second bracket 4. The second spring 20 is sleeved on the second threaded pin 22, and the second spring 20 is abutted between the inner wall of the second mounting cavity 19 and the second sliding plate 21. The end of the second bracket 4 is also threadedly connected to a second end cap 23 for abutting against the second sliding plate 21. The second connecting shaft 7 is inserted into the second end cap 23 and abuts against the second sliding plate 21.

[0027] The beneficial effects of this design are as follows: the second elastic component, like the first elastic component, provides axial support to the second connecting shaft, forming a double-sided symmetrical elastic preload structure, providing bidirectional compensation, and balancing the forces at both ends of the rotating shaft.

[0028] Further, a second abutment ring 24 extends from the outer peripheral wall of the second connecting shaft 7. The diameter of the second abutment ring 24 is also larger than that of the rotating bracket 8, and there is a second movable gap 25 between the second abutment ring 24 and the second bracket 4. The second movable gap 25 is narrower than the first movable gap 18. An operating ring 26 extends from the outer edge of the main shaft 5 near the second connecting shaft 7 and is abutted between the rotating bracket 8 and the second abutment ring 24. The diameter of the operating ring 26 is also larger than that of the rotating bracket 8.

[0029] The beneficial effects of this design are as follows: the second movable gap allows the second abutment ring to move, but the second movable gap cannot provide space for the second connecting shaft to detach from the main shaft, and the first movable gap alone is also insufficient to detach the first connecting shaft from the main shaft. Only by simultaneously pushing the first abutment ring and the second abutment ring to both sides can there be enough space to remove the valve disc and the main shaft. This structure can prevent accidental contact that could cause the valve disc to loosen, thus improving safety and stability. The operating ring is used to move the valve disc toward the second bracket when the second abutment ring is pushed, thereby increasing the removal space on one side of the first connecting shaft.

[0030] Further configuration: the valve body includes a first valve body 27 and a second valve body 29 connected to the first valve body 27 via a fastening assembly 28; the valve seat 1 is clamped and fixed between the first valve body 27 and the second valve body 29; the valve seat 1 is also connected to the second valve body 29 via a first fastener 30; the valve disc 2 is also connected to a pressure cap 32 via a second fastener 31; a valve disc sealing ring 33 for sealing cooperation with the valve seat 1 is clamped between the pressure cap 32 and the valve disc 2.

[0031] The advantages of this design are as follows: The valve body is designed as a split structure connected by fastening components, facilitating the assembly and subsequent maintenance of the internal components of the check valve; the valve seat employs a dual fixing method, combining clamping and connection with the first fastener, significantly improving the installation stability of the valve seat and effectively preventing loosening and displacement under long-term media impact, ensuring the sealing accuracy between the valve seat and the valve disc; simultaneously, the valve disc is connected to the gland via a second fastener and clamps the valve disc sealing ring, ensuring a stable installation and preventing displacement of the sealing ring, enhancing the sealing performance between the valve disc and the valve seat, and facilitating individual replacement of the sealing ring, further reducing maintenance costs and extending the overall service life of the check valve. The fastening components utilize existing hexagonal nuts and studs, while both the first and second fasteners use existing internal hexagonal screws.

[0032] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A flanged single-disc swashplate check valve, comprising a valve body, a valve seat (1), a valve disc (2), and a rotating shaft, wherein the valve seat (1) is fixed within the valve body, and the valve disc (2) is rotatably disposed within the valve body via the rotating shaft for sealing engagement with the valve seat (1), and the rotating shaft is mounted inside the valve body via a fixed bracket, characterized in that: The fixed bracket includes a first bracket (3) and a second bracket (4) respectively disposed on the inner walls of both sides of the valve body. The rotating shaft includes a main shaft (5), a first connecting shaft (6) and a second connecting shaft (7). The valve disc (2) is provided with a rotating bracket (8). The main shaft (5) passes through the rotating bracket (8) to form a rotating connection. The first connecting shaft (6) is inserted into the first bracket (3). The second connecting shaft (7) is inserted into the second bracket (4). One end of the main shaft (5) is inserted into the first connecting shaft (6) and the other end is inserted into the second connecting shaft (7).

2. The flanged single-disc swashplate check valve according to claim 1, characterized in that: The spindle (5) is axially fitted with a core (9), and each end of the core (9) is provided with a tapered surface (10). The first connecting shaft (6) and the second connecting shaft (7) are both provided with tapered grooves (11) that are adapted to the tapered surface (10) at the end of the spindle (5) that extend into the spindle (5).

3. A flanged single-disc swashplate check valve according to claim 1, characterized in that: The first bracket (3) has a first mounting cavity (12) and a first elastic component is provided in the first mounting cavity (12). The first elastic component includes a first spring (13), a first sliding plate (14) and a first threaded pin (15). The first threaded pin (15) is threadedly connected to the first bracket (3). The first spring (13) is sleeved on the first threaded pin (15) and the first spring (13) is abutted between the inner wall of the first mounting cavity (12) and the first sliding plate (14). The end of the first bracket (3) is also threadedly connected to a first end cap (16) for abutting against the first sliding plate (14). The first connecting shaft (6) is inserted into the first end cap (16) and abuts against the first sliding plate (14).

4. A flanged single-disc swashplate check valve according to claim 3, characterized in that: The outer peripheral wall of the first connecting shaft (6) extends to a first abutting ring (17) that abuts against the rotating bracket (8). The diameter of the first abutting ring (17) is larger than that of the rotating bracket (8), and there is a first movable gap (18) between the first abutting ring (17) and the first bracket (3).

5. A flanged single-disc swashplate check valve according to claim 4, characterized in that: The second bracket (4) has a second mounting cavity (19) and a second elastic component is provided in the second mounting cavity (19). The second elastic component includes a second spring (20), a second sliding plate (21) and a second threaded pin (22). The second threaded pin (22) is threadedly connected to the second bracket (4). The second spring (20) is sleeved on the second threaded pin (22) and the second spring (20) is abutted between the inner wall of the second mounting cavity (19) and the second sliding plate (21). The end of the second bracket (4) is also threadedly connected to a second end cap (23) for abutting the second sliding plate (21). The second connecting shaft (7) is inserted into the second end cap (23) and abuts against the second sliding plate (21).

6. A flanged single-disc swashplate check valve according to claim 5, characterized in that: The outer peripheral wall of the second connecting shaft (7) extends a second abutment ring (24), the diameter of the second abutment ring (24) is also larger than that of the rotating bracket (8), and there is a second movable gap (25) between the second abutment ring (24) and the second bracket (4), the second movable gap (25) being narrower than the first movable gap (18). The outer edge of the main shaft (5) near the second connecting shaft (7) extends an operating ring (26) that abuts against the rotating bracket (8) and the second abutment ring (24), the diameter of the operating ring (26) being larger than that of the rotating bracket (8).

7. A flanged single-disc swashplate check valve according to claim 1, characterized in that: The valve body includes a first valve body (27) and a second valve body (29) connected to the first valve body (27) by a fastening assembly (28). The valve seat (1) is clamped and fixed between the first valve body (27) and the second valve body (29), and the valve seat (1) is also connected to the second valve body (29) by a first fastener (30). The valve disc (2) is also connected to a pressure cap (32) by a second fastener (31). A valve disc sealing ring (33) for sealing cooperation with the valve seat (1) is clamped between the pressure cap (32) and the valve disc (2).

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