A seal-enhanced flush valve control device

Abstract

The utility model provides a sealed enhancement type flushes the valve control device, including the valve disc, be provided with the valve cavity in the valve disc, be provided with the valve plate in the valve cavity, fixedly be provided with and the control pivot of valve cavity rotation connection on the valve plate, open the flush mouth that is opposite control pivot eccentric on the valve plate, the disc surface of valve disc is equipped with the through -hole that flush mouth cooperation uses is connected with valve cavity, the annular limit slot that is located valve plate both sides is seted up in the valve cavity, the annular limit slot and the coaxial heart of through -hole, in the utility model, set up the positioning ring that can slide in the annular limit slot, then set up the supporting spring on one side of positioning ring, set up the sealing rubber bushing that is opposite and the valve plate on the other side, the supporting spring is extruded to sealing rubber bushing continuously by positioning ring, when sealing rubber bushing wears, the supporting spring still can make sealing rubber bushing to valve plate add certain extrusion pressure, has the advantage that strengthens the sealing.

Description

Technical Field

[0001] This utility model relates to the technical field of aircraft toilet flush valves, specifically a sealing-enhanced flush valve control device. Background Technology

[0002] Flushing valves are primarily used in aircraft vacuum toilet systems. In this system, the valve controls the opening and closing of the flushing and wastewater discharge channel by rotation. The rotation of the valve is controlled by a controller and a motor. Specifically, the flushing valve has an eccentric flushing hole, and a through hole is formed on the valve plate used to position the valve. When the flushing hole and the through hole are aligned, the flushing and wastewater discharge channel is open; when they are misaligned, the flushing and wastewater discharge channel is closed. The valve plate contains embedded sealing rings on both sides of the flushing valve. The sealing rings are coaxial with the through holes, and their front sides abut against the flushing valve, the purpose of which is to seal the flushing valve and prevent leakage between the valve and the valve plate.

[0003] Chinese patent application CN110453764B discloses a side-discharge vacuum toilet system for aircraft, comprising a flush button, a flush controller, a toilet flush valve, a toilet drain valve, and a main toilet structure. The main toilet structure includes a toilet bowl, a toilet support, a reverse siphon valve, a flush ring assembly, and a manual shut-off valve. The toilet support is fixed to the aircraft cockpit, the toilet bowl is fixed to the toilet support, the flush ring assembly is located on the toilet bowl, the reverse siphon valve is fixed to the upper end of the toilet flush valve and communicates with it, and the flush ring assembly is also communicated with the reverse siphon valve. The toilet flush valve is fixed to the toilet support and located to the side of the toilet bowl, and is connected to a clean water tank via a connecting hose. This invention has the advantages of being lightweight, highly reliable, and easy to maintain. This invention also discloses a flushing method for the side-discharge vacuum toilet system for aircraft.

[0004] The existing flushing structure has some shortcomings in use: the sealing ring is fixed on both sides of the flushing valve panel, and it uses its own elastic extrusion force to squeeze the valve panel. Since the valve panel rotates back and forth at a high frequency, the sealing ring will wear down after a long period of use, resulting in a small extrusion force and poor sealing effect.

[0005] Therefore, this utility model provides a sealing-enhanced flush valve control device. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sealing-enhanced flush valve control device to solve the problems mentioned in the background technology. This utility model has the function of elastic compression sealing, so that the sealing sleeve can always apply a certain compression force to the valve plate, thereby enhancing the sealing function.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing-enhanced flushing valve control device, comprising a valve disc, a valve cavity within the valve disc, a valve plate within the valve cavity, a control shaft fixedly mounted on the valve plate and rotatably connected to the valve cavity, a flushing port eccentrically positioned relative to the control shaft on the valve plate, a through hole on the valve disc communicating with the valve cavity and cooperating with the flushing port, annular limiting grooves located on both sides of the valve plate within the valve cavity, the annular limiting grooves being coaxial with the through hole, a positioning ring fitted within the annular limiting groove, the positioning ring and the annular limiting groove being slidably fitted, a sealing sleeve with an interference fit to the annular limiting groove being adhered to the side of the positioning ring facing the valve plate, and a support spring having one end abutting against the other side of the positioning ring within the annular limiting groove.

[0008] Furthermore, the positioning ring and the annular limiting groove are in transition fit.

[0009] Furthermore, a coaxial annular protrusion is fixedly provided on the outer side of the sealing sleeve.

[0010] Furthermore, plungers are provided on both sides of the valve plate, and a channel communicating with the bottom of the annular limiting groove is opened in the valve plate. The plungers are sleeved in the channel, and a sealing slip ring with one side abutting against the other end of the support spring is sleeved in the annular limiting groove. Oil is provided in the channel between the plunger and the sealing slip ring. Eccentric wheels located on both sides of the valve plate are fixedly sleeved on the control shaft, and the outer wall of the eccentric wheel abuts against one end of the adjacent plunger.

[0011] Furthermore, the outer peripheral wall of the sealing slip ring is provided with a coaxial annular groove II, and an O-ring II is fitted inside the annular groove II. The inner peripheral wall of the sealing slip ring is provided with an annular groove I, and an O-ring I is fitted inside the annular groove I.

[0012] Furthermore, one end of the plunger is provided with a roller that abuts against the outer peripheral wall of the eccentric wheel.

[0013] Furthermore, a positioning cavity is provided inside the valve disc, the control shaft passes through the positioning cavity, and one end of the channel is connected to the positioning cavity.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, a sliding positioning ring is set in the annular limiting groove, and a support spring is set on one side of the positioning ring, and a sealing sleeve that abuts against the door plate is set on the other side. The support spring continuously applies a compressive force to the sealing sleeve through the positioning ring. When the sealing sleeve is worn, the support spring allows the sealing sleeve to still apply a certain compressive force to the door plate, which has the advantage of enhancing the seal.

[0016] 2. In this utility model, by setting a plunger, an eccentric wheel, oil and a sealing slip ring, the squeezing force of the sealing sleeve on the flushing plate is greater when the through hole is closed and less when it is opened. This setting can reduce the friction of the valve plate on the sealing sleeve while satisfying the enhanced sealing function, and extend the service life of the sealing sleeve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the sealing-enhanced flushing valve control device of this utility model after an explosion and unfolding.

[0018] Figure 2 for Figure 1 A magnified diagram of the central "a";

[0019] Figure 3 for Figure 1 A diagram at the bottom;

[0020] Figure 4 for Figure 1 A schematic diagram after assembly.

[0021] In the diagram: 1. Valve plate; 11. Valve cavity; 12. Through hole; 13. Annular limiting groove; 14. Positioning cavity; 15. Channel; 2. Valve plate; 21. Flushing port; 3. Control shaft; 4. Positioning ring; 5. Sealing sleeve; 51. Annular protrusion; 6. Support spring; 7. O-ring one; 8. Plunger; 81. Roller; 9. Sealing slip ring; 91. Annular groove two; 92. Annular groove one; 101. Eccentric wheel; 102. O-ring two. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 4This utility model provides a technical solution: a sealing-enhanced flush valve control device, including a valve disc 1, a valve cavity 11, and a valve plate 2. The valve disc 1 is composed of a left disc and a right disc connected by bolts and a sealing strip. The mating surfaces of the left and right discs coincide with the valve plate 2. The connection method between the valve disc 1 and the toilet can adopt the connection method mentioned in the background art, which will not be repeated in this application. The valve plate 2 is a fan-shaped thin plate. (Approximately 1mm) The valve plate 2 is fixedly equipped with a control shaft 3 that is rotatably connected to the valve cavity 11. The valve plate 2 has a flushing port 21 that is eccentric to the control shaft 3. The valve disc 1 has a through hole 12 that connects to the valve cavity 11 and works in conjunction with the flushing port 21. When the control shaft 3 rotates back and forth, it can drive the valve plate 2 to rotate, thereby controlling the flushing port 21 and the through hole 12 to be relative or offset. When they are relative, sewage is discharged; when they are offset, the through hole 12 is blocked.

[0024] In this technical solution, annular limiting grooves 13 are formed on both sides of the valve plate 2 within the valve cavity 11. The annular limiting grooves 13 and the through hole 12 are coaxial. A positioning ring 4 is fitted inside the annular limiting groove 13, and the positioning ring 4 and the annular limiting groove 13 are in sliding fit. In specific implementation, the positioning ring 4 and the annular limiting groove 13 are in transition fit. A sealing sleeve 5 that is interference-fitted with the annular limiting groove 13 is bonded to the side of the positioning ring 4 facing the valve plate 2. The outer side of the sealing sleeve 5 is pressed against the side wall of the valve plate 2, thereby ensuring that the through hole 12 is in a sealed state when closed. A support spring 6 is provided in the annular limiting groove 13, with one end abutting against the other side of the positioning ring 4. The support spring 6 continuously applies an outward elastic thrust to the positioning ring 4. This elastic thrust causes the sealing sleeve 5 to continuously apply a certain elastic compressive force to the valve plate 2, increasing the elastic deformation of the sealing sleeve 5. Preferably, a positioning sleeve 4 is fixedly provided on the outer side of the sealing sleeve 5. The annular protrusion 51 of the shaft is also made of rubber and its outer surface is coated with fluoroplastic. The fluoroplastic can improve the wear resistance of the annular protrusion 51. It should be noted that when the valve plate 2 rotates to the transition between the flush port 21 and the through hole 12, the elastic extrusion force makes the opposite sides of the annular protrusions 51 on both sides of the valve plate 2 locally fit together, which can effectively prevent sewage from entering the valve cavity 11. Moreover, when the flush port 21 and the through hole 12 are opposite or misaligned, the sealing sleeve 5 can continue to apply extrusion force to the valve plate 2, greatly enhancing the sealing effect.

[0025] Furthermore, plungers 8 are provided on both sides of the valve plate 2, and a channel 15 is provided in the valve disc 1 to connect to the bottom of the annular limiting groove 13. The plungers 8 are fitted in the channel 15, and the plungers 8 and the channel 15 are sealed together. Specifically, an annular groove 3 is provided on the outside of the plunger 8, and an O-ring 3 is fitted in the annular groove 3. Alternatively, a rubber sleeve can be directly fixed on the outside of the plunger 8 for sealing. A sealing slip ring 9 is fitted in the annular limiting groove 13, with one side abutting against the other end of the support spring 6. Oil is provided in the channel 15 between the plunger 8 and the sealing slip ring 9. When the plunger 8 moves axially, it will squeeze the oil. The oil is hydraulic oil. The oil will squeeze the sealing slip ring 9, and the sealing slip ring 9 will squeeze the support spring 6, thereby further improving the elastic squeezing force on the sealing rubber sleeve 5. The outer peripheral wall of the sealing slip ring 9 is provided with a coaxial annular groove 2 91, and an O-ring 2 102 is fitted inside the annular groove 2 91. The inner peripheral wall of the sealing slip ring 9 is provided with a coaxial annular groove 1 92, and an O-ring 1 7 is fitted inside the annular groove 1 92. This arrangement effectively prevents oil from entering the space between the sealing slip ring 9 and the positioning ring 4, so that the oil can reliably transmit power.

[0026] The control shaft 3 is fixedly fitted with eccentric wheels 101 located on both sides of the valve plate 2. The outer wall of the eccentric wheel 101 abuts against one end of the adjacent plunger 8. In a specific implementation, it is preferred that one end of the plunger 8 is provided with a roller 81 that abuts against the outer peripheral wall of the eccentric wheel 101. The roller 81 can reduce the friction between the plunger 8 and the eccentric wheel 101. When the control shaft 3 rotates, it will drive the eccentric wheel 101 to rotate. The eccentric wheel 101 will use its outer arc surface to push the plunger 8 to move axially. When in use, the fixed installation angle of the eccentric wheel 101 is determined by the plunger 8 being driven and squeezed by the eccentric wheel 101 when the through hole 12 is closed. That is to say, when the valve plate 2 blocks the through hole 12, the squeezing force of the sealing sleeve 5 on the valve plate 2 is at its maximum. When in use, a groove can be opened around the outer periphery of the eccentric wheel 101 to limit the roller 81.

[0027] In this embodiment, a positioning cavity 14 is provided inside the valve plate 1. The control shaft 3 passes through the positioning cavity 14. One end of the channel 15 is connected to the positioning cavity 14. The eccentric wheel 101 is located inside the positioning cavity 14. In use, a positioning bearing and a matching sealing assembly connected to the control shaft 3 are installed inside the positioning cavity 14. The drive method for controlling the rotation of the shaft 3 can adopt the structure in the patent documents mentioned in the background art.

[0028] Working principle: When it is necessary to open the through hole 12, the control shaft 3 is controlled to rotate, the valve plate 2 moves between the two sealing sleeves 5, and at the same time the eccentric wheel 101 will rotate to reduce the squeezing force on the plunger 8. The support spring 6 extends and pushes the sealing slip ring 9 back. At this time, the squeezing force of the support spring 6 on the positioning ring 4 is reduced, and thus the squeezing force of the sealing sleeve 5 on the valve plate 2 is reduced. When the flush port 21 and the through hole 12 are opposite, the through hole 12 is opened, and the left drain pipe and the right drain pipe connected to the valve plate 1 are connected. At this time, the dirt will enter through the left drain pipe, then pass through the through hole 12 and enter the right drain pipe, and finally enter the dirt tank. When it is necessary to close the through hole 12, the control shaft 3 is reversed. The eccentric wheel 101 squeezes the plunger 8 through the roller 81, and the oil in the channel 15 is squeezed. The oil squeezes the sealing slip ring 9 and the support spring 6. The squeezing force of the sealing sleeve 5 on the valve plate 2 increases. When the flush port 21 and the through hole 12 are misaligned, the through hole 12 is closed. At this time, the squeezing force of the sealing sleeve 5 on the valve plate 2 is enhanced under the action of the support spring 6 and the oil, which greatly improves the sealing effect.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sealing-enhanced flush valve control device, comprising a valve disc (1), wherein a valve cavity (11) is provided inside the valve disc (1), a valve plate (2) is provided inside the valve cavity (11), a control shaft (3) rotatably connected to the valve cavity (11) is fixedly provided on the valve plate (2), a flush port (21) eccentric to the control shaft (3) is provided on the valve plate (2), and a through hole (12) communicating with the valve cavity (11) and cooperating with the flush port (21) is provided on the disc surface of the valve disc (1), characterized in that, The valve cavity (11) has an annular limiting groove (13) located on both sides of the valve plate (2). The annular limiting groove (13) and the through hole (12) are coaxial. A positioning ring (4) is sleeved in the annular limiting groove (13). The positioning ring (4) and the annular limiting groove (13) are slidably engaged. A sealing sleeve (5) that is interference-fitted with the annular limiting groove (13) is glued to the side of the positioning ring (4) facing the valve plate (2). A support spring (6) with one end abutting against the other side of the positioning ring (4) is provided in the annular limiting groove (13).

2. The sealing-enhanced flushing valve control device according to claim 1, characterized in that: The positioning ring (4) and the annular limiting groove (13) are in transition fit.

3. The sealing-enhanced flushing valve control device according to claim 1, characterized in that: The outer side of the sealing sleeve (5) is fixedly provided with a coaxial annular protrusion (51).

4. The sealing-enhanced flushing valve control device according to claim 1, characterized in that: The valve plate (2) is provided with plungers (8) on both sides. The valve disc (1) is provided with a channel (15) that connects to the bottom of the annular limiting groove (13). The plunger (8) is sleeved in the channel (15). The annular limiting groove (13) is provided with a sealing slip ring (9) that abuts against one side and the other end of the support spring (6). The channel (15) is provided with oil between the plunger (8) and the sealing slip ring (9). The control shaft (3) is fixedly sleeved with eccentric wheels (101) located on both sides of the valve plate (2). The outer wall of the eccentric wheel (101) abuts against one end of the adjacent plunger (8).

5. The sealing-enhanced flushing valve control device according to claim 4, characterized in that: The outer peripheral wall of the sealing slip ring (9) is provided with a coaxial annular groove two (91), and an O-ring two (102) is fitted inside the annular groove two (91). The inner peripheral wall of the sealing slip ring (9) is provided with an annular groove one (92), and an O-ring one (7) is fitted inside the annular groove one (92).

6. The sealing-enhanced flushing valve control device according to claim 4, characterized in that: One end of the plunger (8) is provided with a roller (81) that abuts against the outer peripheral wall of the eccentric wheel (101).

7. The sealing-enhanced flushing valve control device according to claim 4, characterized in that: The valve plate (1) has a positioning cavity (14) inside, the control shaft (3) passes through the positioning cavity (14), and one end of the channel (15) is connected to the positioning cavity (14).

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