Pneumatic control drainage system and pneumatic control device thereof

Abstract

The utility model discloses a pneumatic control drainage system and pneumatic control device thereof reduce the pressing stroke of pneumatic button under the condition of not increasing the pressing force. Wherein, the pneumatic control device includes control body, pressing assembly, elastic part and check valve, the control body is provided with movable cavity, the movable cavity is provided with air outlet, and at least one air inlet is located at its bottom, the lower end of pressing assembly is sealedly cooperated in movable cavity, and its upper end provides the pressure position of being pressed by user, the elastic part is arranged between the bottom of movable cavity and the lower end of pressing assembly, is used for driving the reset of pressing assembly, the check valve is arranged at the bottom of movable cavity, and when pressing assembly is pressed by user, the air inlet is blocked, and when pressing assembly is reset by elastic part, the air inlet is opened.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic drainage technology, and specifically refers to a pneumatically controlled drainage system and its pneumatic control device. Background Technology

[0002] Water-filled toilet tanks typically rely on a drain valve located at the bottom to drain water, while the flush button is usually located at the top of the toilet tank. The flush button and the drain valve are driven by mechanical and / or pneumatic linkage.

[0003] In existing technologies, when the water tank is at a specific working water level (e.g., below 250mm), the pneumatically driven drain valve system currently on the market requires a pneumatic button press stroke of approximately 17mm or more to properly open the drain valve. However, when the pneumatic button press stroke is too large, consumers, especially children, may not press it fully, causing the drain valve to malfunction. Furthermore, a large press stroke makes it easy for fingers to bump against the button's guide edge, resulting in a poor user experience. Utility Model Content

[0004] The main purpose of this utility model is to provide a pneumatically controlled drainage system and its pneumatic control device, which solves the problems existing in the prior art and reduces the pressing stroke of the pneumatic button without increasing the pressing force.

[0005] To achieve the above objectives, one of the solutions of this utility model is: A pneumatic control device includes a control body, a pressing assembly, an elastic element, and a one-way valve. The control body has a movable cavity. The movable cavity has an air outlet and at least one air inlet located at its bottom. The lower end of the pressing assembly is dynamically sealed within the movable cavity, and its upper end provides a pressurized position for being pressed by a user. The elastic element is disposed between the bottom of the movable cavity and the lower end of the pressing assembly, for driving the pressing assembly to reset. The one-way valve is disposed at the bottom of the movable cavity and blocks the air inlet when the pressing assembly is pressed by the user and opens the air inlet when the pressing assembly is reset by the elastic element.

[0006] The bottom of the movable cavity is provided with a guide hole, and the air inlet is located on the side of the guide hole; the one-way valve includes a guide post that is movably fitted in the guide hole, and a sealing plate connected to the inner end of the guide post, the sealing plate being disposed opposite to the air inlet.

[0007] Preferably, the sealing plate has a sealing flange protruding from the surface facing the bottom of the movable cavity. The sealing flange is coaxially arranged with the guide post, and the air inlet is located inside the ring of the sealing flange.

[0008] Preferably, the guide post is provided with at least one hook on its circumferential surface, and the hook is movably engaged with the outer port of the guide hole as the one-way valve moves.

[0009] The air outlet is located at the bottom of the active chamber and extends outward with a connecting part for connecting the air pipe for outputting gas.

[0010] The pressing assembly includes a retaining ring detachably connected to the opening of the movable cavity, a piston rod movably passing through the retaining ring, and a button connected to the upper end of the piston rod; the lower end of the piston rod is dynamically sealed to the side wall of the movable cavity.

[0011] Preferably, the lower end circumferential surface of the piston rod is provided with a mounting ring groove and a limiting protrusion ring; a V-shaped sealing ring is embedded in the mounting ring groove, and the outer edge of the V-shaped sealing ring is tightly fitted to the side wall of the movable cavity; the limiting protrusion ring is arranged adjacent to the mounting ring groove, and the limiting protrusion ring is closer to the fixed ring, and the outer diameter of the limiting protrusion ring is larger than the inner diameter of the fixed ring.

[0012] Preferably, the pressing assembly further includes a button seat and a locking nut; the button seat is coaxially arranged with the fixing ring and detachably connected; the button is movably inserted into the button seat; the locking nut is sleeved on the circumferential surface of the button seat and threadedly connected to the button seat.

[0013] The elastic element is a spring, and a first positioning protrusion and a second positioning protrusion are respectively provided between the bottom of the movable cavity and the lower end of the pressing component for the spring end to be sleeved.

[0014] The second solution of this utility model is: A pneumatically controlled drainage system includes the aforementioned pneumatic control device, a drainage valve, and a pneumatic drive device for driving the drainage valve; the pneumatic drive device includes a drive body, an air bladder, and a push cylinder; the drive body is disposed on the side of the drainage valve; the air bladder is installed in the drive body, with one end communicating with the air outlet; the push cylinder is disposed at the other end of the air bladder and is kinetically connected to the valve stem of the drainage valve.

[0015] The pneumatic drive device further includes a flat top cover disposed inside the push cylinder; the flat top cover includes a disc and a plurality of claws evenly disposed on the upper surface of the disc; the upper end of the airbag is provided with a groove, and the disc is embedded in the groove; the claws protrude and hook onto the end face of the push cylinder, and the inner wall of the push cylinder clamps the side wall of the groove with the disc.

[0016] The pneumatic drive device further includes an air guide column detachably installed in the drive body; the air guide column penetrates the end of the airbag away from the push cylinder, and the circumferential surface of the air guide column interlocks with the end of the airbag and clamps the periphery of the end of the airbag with the inner wall of the drive body; the air guide column communicates with the air outlet.

[0017] The airbag has several deformable pleats between its upper and lower ends, and the outer diameter of each pleat decreases from top to bottom.

[0018] After adopting the above technical solution, the present invention has the following technical effects: Through the above solution, this utility model sets the air inlet of the control body on the end face (i.e., the bottom of the active cavity), and the air inlet is controlled by a one-way valve. When the pressing component is pressed by the user, the pressure inside the active cavity increases, and the one-way valve immediately switches to the closed state to prevent air leakage. Compared with most existing technologies that design the air inlet on the side wall of the air cavity, the lower end of the pressing component of this utility model will not open the air inlet no matter where it moves. Instead, it can rapidly increase the pressure inside the active cavity. Compared with existing pneumatic buttons, the required pressing stroke is shorter, and large and small strokes can be achieved with a smaller stroke. The reliability of the drain valve using the large and small stroke function is significantly improved, and the user experience is optimized. In addition, when the user stops pressing, the pressing component resets under the action of the elastic element, causing the volume of the chamber inside the active cavity to increase and the pressure to decrease. When the air pressure in the active cavity is less than atmospheric pressure, the one-way valve is pushed open, and the air inlet begins to intake air to replenish the pneumatic control device for the next activation. Attached Figure Description

[0019] Figure 1 This is a perspective view of the first embodiment of the present utility model.

[0020] Figure 2 This is an exploded view of the first embodiment of the present invention.

[0021] Figure 3 This is a cross-sectional view of the first embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the pressing state in the first embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the reset state of the first embodiment of the present invention.

[0024] Figure 6 This is a perspective view of the control body according to the first embodiment of the present utility model.

[0025] Figure 7 This is a cross-sectional view of the one-way valve according to the first embodiment of this utility model.

[0026] Figure 8 This is a perspective view of the second embodiment of the present utility model.

[0027] Figure 9 This is a cross-sectional view of the pneumatic drive device according to the second embodiment of this utility model.

[0028] Figure 10 This is a perspective view of the flat top cover of the second embodiment of this utility model.

[0029] Figure 11 This is a cross-sectional view of the airbag in the second embodiment of the present invention.

[0030] Explanation of icon numbers: 1-Pneumatic control device; 11-Control body; 111-Moving chamber; 112-Air outlet; 113-Air inlet; 114-Guide hole; 115-Connecting part; 116-First positioning protrusion; 12-Pressing assembly; 121-Fixing ring; 122-Piston rod; 1221-Mounting ring groove; 1222-Limiting protrusion; 1223-Second positioning protrusion; 123-Button; 124-V-ring seal; 125-Button seat; 126-Locking nut; 13-Elastic element; 14-One-way valve; 141-Guide post; 142-Sealing plate; 143-Sealing flange; 144-Hook; 2-Trachea; 3-Drain valve; 31-Valve stem; 311-Horizontal extension; 4-Pneumatic drive device; 41-Drive body; 42-Airbag; 421-Groove; 422-Folded part; 43-Push cylinder; 44-Flat top cover; 441-Disc; 442-Claw; 45-Air guide column; A - Position under pressure. Detailed Implementation

[0031] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0032] refer to Figures 1 to 7 The first embodiment of the present invention is shown, which illustrates a pneumatic control device 1, including a control body 11, a pressing assembly 12, an elastic element 13, and a one-way valve 14. The control body 11 is provided with a movable cavity 111; see also Figure 6 The active cavity 111 is provided with an air outlet 112 and at least one air inlet 113 located at its bottom; The lower end of the pressing component 12 is dynamically sealed within the movable cavity 111, and its upper end provides a pressure position A that is pressed by the user. The elastic element 13 is disposed between the bottom of the movable cavity 111 and the lower end of the pressing assembly 12, and is used to provide elastic force to drive the pressing assembly 12 to reset. The one-way valve 14 is located at the bottom of the active chamber 111 and blocks the air inlet 113 when the pressing component 12 is pressed by the user and opens the air inlet 113 when the pressing component 12 is reset by the elastic element 13.

[0033] Through the above solution, this utility model sets the air inlet 113 of the control body 11 on the end face (i.e., the bottom of the movable cavity 111) of the movable cavity 111, and the air inlet 113 is controlled to open and close by a one-way valve 14. See [link to relevant documentation]. Figure 4 When the pressing component 12 is pressed by the user, the internal pressure of the active chamber 111 increases, and the one-way valve 14 immediately switches to the closed state to prevent air leakage. Furthermore, compared to most existing technologies that design the air inlet on the side wall of the air chamber, the lower end of the pressing component 12 in this invention will not open the air inlet 113 regardless of its position. Instead, it allows the internal pressure of the active chamber 111 to increase rapidly. Compared to existing pneumatic buttons, the required pressing stroke is shorter, and both large and small strokes can be achieved with a smaller stroke. The reliability of the drain valve using the large and small stroke function is significantly improved, and the user experience is optimized. See also... Figure 5 When the user stops pressing, the pressing component 12 is reset under the action of the elastic element 13, which makes the volume of the chamber in the active cavity 111 increase and the pressure decrease until the air pressure in the active cavity 111 is less than the atmospheric pressure. Then the one-way valve 14 is pushed open and the air inlet 113 starts to intake air to replenish the pneumatic control device for the next activation.

[0034] In the first embodiment, see Figure 6 , 7 The bottom of the aforementioned movable cavity 111 is provided with a guide hole 114, and an air inlet 113 is located on the side of the guide hole 114. The one-way valve 14 is made of elastic materials such as rubber and silicone, and includes a guide post 141 that is movably fitted in the guide hole 114, and a sealing plate 142 connected to the inner end of the guide post 141. The sealing plate 142 is arranged opposite to the air inlet 113 to seal the air inlet 113 when it is in contact with the bottom of the movable cavity 111. The thickness of the sealing plate 142 is set to 0.3~0.6mm. In addition to elastic materials such as rubber and silicone, the one-way valve 14 can also be made of materials such as plastic that can be slightly deformed to ensure that the air inlet 113 can be sealed under pressure. In fact, a small amount of air leakage generated during the sealing process of the one-way valve 14 does not affect the pneumatic function of the product. Therefore, this utility model does not completely limit the material of the one-way valve 14 in practical applications.

[0035] Furthermore, a sealing flange 143 protrudes from the surface of the sealing plate 142 facing the bottom of the movable cavity 111. The sealing flange 143 is coaxially arranged with the guide post 141, and the air inlet 113 is located inside the ring of the sealing flange 143. By setting the sealing flange 143, the surface contact between the sealing plate 142 and the bottom of the movable cavity 111 becomes a line contact (referring to the annular line formed by the sealing flange). When the sealing plate 142 is subjected to pressure, it will deform to make the sealing flange 143 fit more tightly against the bottom of the movable cavity 111, resulting in better sealing performance. When multiple air inlets 113 are provided, they can be arranged at equal angular intervals around the axis of the guide hole 114 to achieve uniform arrangement.

[0036] Meanwhile, at least one hook 144 is provided on the circumferential surface of the guide post 141. The hook 144 moves and engages with the outer port of the guide hole 114 as the one-way valve 14 moves, to prevent the guide post 141 from disengaging from the guide hole 114, thereby limiting the stroke of the one-way valve 14. Obviously, to ensure structural stability, when multiple hooks 144 are provided, they can be arranged at equal angular intervals around the axis of the guide post 141.

[0037] In the first embodiment, the above-mentioned air outlet 112 is also located at the bottom of the movable cavity 111, and a connecting part 115 extends outward for connecting the air pipe 2 for outputting gas.

[0038] In the first embodiment, the pressing assembly 12 includes a fixing ring 121 detachably connected to the opening of the movable cavity 111, a piston rod 122 movably passing through the fixing ring 121, and a button 123 connected to the upper end of the piston rod 122. The lower end of the piston rod 122 dynamically seals against the side wall of the movable cavity 111, meaning the lower end of the piston rod 122 is the lower end of the pressing assembly 12, and the button 123 is the pressure-bearing position A of the pressing assembly 12. The fixing ring 121 is detachably connected to the pressing assembly 12 using a snap-fit ​​connection, facilitating assembly and disassembly. The button 123 is assembled with the upper surface of the piston rod 122 using a plug-in connection.

[0039] Furthermore, the lower end circumferential surface of the piston rod 122 is provided with a mounting ring groove 1221 and a limiting protrusion ring 1222; a V-shaped sealing ring 124 is embedded in the mounting ring groove 1221, and the outer edge of the V-shaped sealing ring 124 is tightly fitted to the side wall of the movable cavity 111; the limiting protrusion ring 1222 is arranged adjacent to the mounting ring groove 1221, and the limiting protrusion ring 1222 is closer to the fixed ring 121. The outer diameter of the limiting protrusion ring 1222 is larger than the inner diameter of the fixed ring 121, which is used to prevent the piston rod 122 from coming out of the fixed ring 121.

[0040] Meanwhile, the aforementioned pressing assembly 12 also includes a button base 125 and a locking nut 126; the button base 125 is coaxially arranged with and detachably connected to the retaining ring 121; the button 123 is movably inserted into the button base 125; the locking nut 126 is sleeved on the circumferential surface of the button base 125 and threadedly connected to the button base 125. Normally, the button base 125 is inserted into the mounting surface of the pneumatic control device (such as the upper wall of a toilet tank) and fixed by the locking nut 126. The lower end of the button base 125 and the upper end of the retaining ring 121 are detachably connected by a snap-fit ​​connection, facilitating assembly and disassembly.

[0041] In the first embodiment, the elastic element 13 is a spring. A first positioning protrusion 116 and a second positioning protrusion 1223 for the spring end to be sleeved are respectively provided between the bottom of the movable cavity 111 and the lower end of the pressing assembly 12 (i.e. the lower end of the piston rod 122), which can ensure that the spring will not move during compression and extension.

[0042] In addition, refer to Figures 8 to 11 The image shows a second embodiment of the present invention, illustrating a pneumatically controlled drainage system. This system includes the pneumatic control device from the first embodiment, a drainage valve 3, and a pneumatic drive device 4 for driving the drainage valve 3. The pneumatic drive device 4 includes a drive body 41, an air bladder 42, and a pusher 43. The drive body 41 is located on the side of the drainage valve 3. The air bladder 42 is installed inside the drive body 41, with one end connected to the air outlet 112 via an air pipe 2. The pusher 43 is located at the other end of the air bladder 42 and is connected to the valve stem 31 of the drainage valve 3. Specifically, it movably abuts against the horizontal extension 311 located at the upper end of the valve stem 31, thereby pushing the valve stem 31 up when the air bladder 42 inflates, thus achieving drainage.

[0043] Obviously, the second embodiment, by including the first embodiment, can solve the same technical problem, achieve the same technical effect, and may be further optimized based on this technical effect. Specifically: In the second embodiment, the pneumatic drive device 4 further includes a flat-top cover 44 disposed within the push cylinder 43; the flat-top cover 44 includes a disc 441 and several claws 442 evenly disposed on the upper surface of the disc 441; the upper end of the airbag 42 is provided with a groove 421, and the disc 441 is embedded in the groove 421; the claws 442 protrude and hook onto the end face of the push cylinder 43, and the inner wall of the push cylinder 43 clamps the side wall of the groove 421 with the disc 441. Thus, the shape of the upper end of the airbag 42 is always planar and the planar plane is perpendicular to the axial direction of the drive body 41 (i.e., the inflation direction of the airbag 42 / the moving direction of the push cylinder 43) by the flat-top cover 44, ensuring that the air pressure of the airbag 42 always acts on the planar plane when it is inflated and pushes the push cylinder 43 to move up and down, so that it acts on the drain valve 3, making the function more stable. Based on this, the present invention can reduce the pressing stroke of button 123 by more than 30% without increasing the pressing force. For example, the original pressing stroke of 17mm can be reduced to less than 12mm.

[0044] In the second embodiment, the pneumatic drive device 4 further includes an air guide column 45 detachably installed in the drive body 41; the air guide column 45 penetrates the end of the airbag 42 away from the push cylinder 43, and the circumferential surface of the air guide column 45 interlocks with the end of the airbag 42, and clamps the periphery of the end of the airbag 42 with the inner wall of the drive body 41 to form a seal; the air guide column 45 is connected to the air outlet 112 through the air pipe 2.

[0045] In the second embodiment, a plurality of deformable pleats 422 are provided between the upper and lower ends of the airbag 42, and the outer diameter of each pleat 422 decreases from top to bottom.

[0046] In the second embodiment, the drain valve 3 is provided with two valve stems 31, which correspond to the "large flush" and "small flush" functions respectively. Therefore, two sets of pneumatic control devices and pneumatic drive devices 4 are provided.

[0047] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A pneumatic control device, characterized in that: Includes a control body, a pressing assembly, an elastic element, and a one-way valve; The control body is provided with a movable cavity; the movable cavity is provided with an air outlet and at least one air inlet located at its bottom; The lower end of the pressing component is dynamically sealed within the movable cavity, while its upper end provides a pressure position for the user to press. The elastic element is disposed between the bottom of the movable cavity and the lower end of the pressing assembly, and is used to drive the pressing assembly to reset; The one-way valve is located at the bottom of the active chamber and blocks the air inlet when the pressing component is pressed by the user and opens the air inlet when the pressing component is reset by the elastic element.

2. The pneumatic control device as described in claim 1, characterized in that: The bottom of the movable cavity is provided with a guide hole, and the air inlet is located on the side of the guide hole; the one-way valve includes a guide post that is movably fitted in the guide hole, and a sealing plate connected to the inner end of the guide post, the sealing plate being disposed opposite to the air inlet.

3. The pneumatic control device as described in claim 2, characterized in that: The sealing plate has a sealing flange protruding from the surface facing the bottom of the movable cavity. The sealing flange is coaxially arranged with the guide post, and the air inlet is located inside the ring of the sealing flange. The guide post has at least one hook on its circumferential surface. The hook moves and engages with the outer port of the guide hole as the one-way valve moves.

4. The pneumatic control device as described in claim 1, characterized in that: The pressing assembly includes a retaining ring detachably connected to the opening of the movable cavity, a piston rod movably passing through the retaining ring, and a button connected to the upper end of the piston rod; the lower end of the piston rod is dynamically sealed to the side wall of the movable cavity.

5. The pneumatic control device as described in claim 4, characterized in that: The lower end of the piston rod is provided with a mounting ring groove and a limiting protrusion. A V-shaped sealing ring is embedded in the mounting ring groove, and the outer edge of the V-shaped sealing ring is tightly fitted to the side wall of the movable cavity. The limiting protrusion is arranged adjacent to the mounting ring groove, and the limiting protrusion is closer to the fixed ring. The outer diameter of the limiting protrusion is larger than the inner diameter of the fixed ring.

6. The pneumatic control device as described in claim 4, characterized in that: The pressing assembly also includes a button base and a locking nut; the button base is coaxially arranged with the fixing ring and detachably connected; the button is movably inserted into the button base; the locking nut is sleeved on the circumferential surface of the button base and threadedly connected to the button base.

7. A pneumatically controlled drainage system, comprising the pneumatic control device as described in any one of claims 1 to 6, characterized in that: It also includes a drain valve and a pneumatic drive device for driving the drain valve; the pneumatic drive device includes a drive body, an air bladder and a push cylinder; the drive body is disposed on the side of the drain valve; the air bladder is installed in the drive body, one end of which is connected to the air outlet; the push cylinder is disposed at the other end of the air bladder and is drivenly connected to the valve stem of the drain valve.

8. The pneumatically controlled drainage system as described in claim 7, characterized in that: The pneumatic drive device further includes a flat top cover disposed inside the push cylinder; the flat top cover includes a disc and a plurality of claws evenly disposed on the upper surface of the disc; the upper end of the airbag is provided with a groove, and the disc is embedded in the groove; the claws protrude and hook onto the end face of the push cylinder, and the inner wall of the push cylinder clamps the side wall of the groove with the disc.

9. The pneumatically controlled drainage system as described in claim 7, characterized in that: The pneumatic drive device further includes an air guide column detachably installed in the drive body; the air guide column penetrates the end of the airbag away from the push cylinder, and the circumferential surface of the air guide column interlocks with the end of the airbag and clamps the periphery of the end of the airbag with the inner wall of the drive body; the air guide column communicates with the air outlet.

10. The pneumatically controlled drainage system as described in claim 7, characterized in that: The airbag has several deformable pleats between its upper and lower ends, and the outer diameter of each pleat decreases from top to bottom.

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