Pressure protection valve
By using the design of the airbag structure and the design of the installation component in the pressure protective valve, the problem of anti -channeling and sewage channel blockage in existing technologies has been solved, and effective sealing and sewage discharge of positive pressure and negative pressure are achieved. Improve the applicability of the equipment.
Patent Information
- Application Number
- CN202421309537.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The existing pressure protection valves are prone to cause backflow of odor gases under negative pressure conditions, and the outlet end of the duck mouth is small, which may cause dirt to be blocked, resulting in poor sewage discharge channels and reduce the applicability of the equipment.
Design a stress protection valve, use the airbag structure, install the airbag at the mouth of the valve by installing the component, use the deformation of the airbag under positive pressure and negative pressure to block the sewage discharge pipe, and enter the airbag through the inlet of the airbag. Make the airbags swell and block the valve port.
Achieve effective blocking sewage discharge pipes under positive pressure and negative pressure, reduce the cost of equipment manufacturing, reduce the possibility of dirt -blocking, ensure the smooth flow of sewage channels, and improve the applicability of the pressure protection valve.
Smart Images
Figure CN222416186U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valve bodies, in particular to a pressure protection valve. Background Art
[0002] The pressure protection valve is a valve body that prevents odor backflow and is mainly used in pipes that may cause odor leakage.
[0003] A vacuum toilet is a device used for excretion. This device must be equipped with a vacuum pump to create a vacuum in the entire system. The system must have an isolation valve leading to each toilet to isolate it from the system. When the toilet is flushed, this valve is opened to remove the contents of the toilet by relying on the pressure difference with the atmospheric pressure. A pressure protection valve is often installed on the sewage pipe of a vacuum toilet to prevent odor from flowing back.
[0004] The commonly used gray water unit (pressure protection valve) on the market has a film and a duckbill (or similar structure) inside. When the internal pressure is negative, the sewage pipe is blocked by the film. If the gray water unit is used on a train, when the train enters a tunnel, the pressure in the sewage pipe increases due to the change in external pressure, and the odorous gas will push the film back and enter the sewage pipe. The existing gray water unit blocks the odorous gas through the smaller port of the duckbill to prevent the odorous gas from flowing back.
[0005] The grey water unit in the prior art prevents gas backflow through a duckbill, but the outlet end of the duckbill is small and there is a possibility of clogging with dirt, causing the entire sewage discharge channel to be blocked, thereby reducing the applicability of the grey water unit. Utility Model Content
[0006] In order to improve the applicability of the pressure protection valve, the present application provides a pressure protection valve.
[0007] The pressure protection valve provided in this application adopts the following technical solution:
[0008] A pressure protection valve comprises a drain pipe and an air bag, wherein the drain pipe is provided with a valve port, a block is connected to a position inside the drain pipe close to the valve hole, the block divides the inside of the drain pipe into an inlet chamber and an outlet chamber, the air bag is arranged at the valve port, an air inlet is opened at a position of the air bag corresponding to the outlet chamber, and an installation component for installing the air bag is provided on the drain pipe.
[0009] By adopting the above technical solution, the staff uses the installation component to install the airbag at the valve port. When discharging sewage, the external vacuum pump forms a negative pressure in the outlet chamber, and the sewage and water are moved by the traction force to push open the side wall of the airbag, so that the inlet chamber and the outlet chamber are connected. After the sewage and water pass through the airbag, the airbag is pressed against the inlet chamber by the pressure of the outlet chamber; when the pressure of the outlet chamber increases, the odorous gas enters the airbag from the air inlet, and the airbag expands, and fits the installation component on one side and the inlet chamber on the other side, both of which achieve the effect of blocking the valve port of the sewage pipe. The staff uses the deformation of the airbag to block the sewage pipe under positive and negative pressure inside the sewage pipe. Compared with the existing technology of blocking odorous gas by two structures, the structure is simpler, the manufacturing cost of the pressure protection valve is reduced, and the size of the internal channel of the sewage pipe remains unchanged, which reduces the possibility of sewage blocking the sewage pipe, ensures the smooth discharge of the sewage pipe, and improves the applicability of the pressure protection valve.
[0010] Optionally, the installation assembly includes a valve cover and a valve hoop, the valve cover is installed at the valve port, the air bag is located between the sewage pipe and the valve cover, the valve hoop includes a fixed half ring and a locking half ring, the fixed half ring is rotatably connected to the locking half ring, and a locking assembly for locking the locking half ring is provided on the fixed half ring. When the air bag is locked, the valve cover is connected to the valve port through the valve hoop.
[0011] By adopting the above technical solution, when installing the airbag, the staff places the airbag at the valve mouth, then covers the valve mouth with the valve cover to limit the airbag, then wraps the valve cover with the fixing half ring and the locking half ring, and finally uses the locking assembly to limit the locking half ring, thereby achieving the installation of the airbag.
[0012] Optionally, the locking assembly includes a fixed block, a locking tooth and a fixed tooth, the fixed block is connected to the fixed half ring, a plug-in groove is formed on the fixed block, the locking tooth is rotatably connected in the plug-in groove, a contact plane is provided on the locking tooth, a plug-in block is connected to the locking half ring, the fixed tooth is connected to several blocks on the plug-in block, and when the valve cover is installed, the plug-in block is plugged into the plug-in groove, the locking tooth presses against the fixed tooth, and the contact plane presses against the side wall of the plug-in groove.
[0013] By adopting the above technical solution, when limiting the locking half-ring, the staff will plug the plug-in block into the plug-in groove. During this process, the fixed teeth will contact the locking teeth, and the locking teeth will rotate until the locking half-ring wraps the valve cover tightly, the locking teeth will contact the fixed teeth, and the contact plane will contact the side wall of the plug-in groove, thereby limiting the movement of the plug-in block and achieving the effect of limiting the locking half-ring.
[0014] Optionally, a toggle groove is formed on the fixing block at a position corresponding to the locking tooth, and a toggle rod is connected to the locking tooth. The toggle rod passes through the toggle groove and extends to the outside of the fixing block.
[0015] By adopting the above technical solution, when disassembling the airbag, the staff moves the toggle rod to move the locking teeth and move them out of the range of the fixed teeth, and then the plug-in block can be taken out to loosen the valve hoop, and the valve cover and the airbag can be taken out.
[0016] Optionally, a vent hole is provided on the valve cover.
[0017] By adopting the above technical solution, the vent hole is used to balance the pressure at the valve port, so that the airbag can expand and contract smoothly, ensuring the stability of the sealed inlet and outlet chambers.
[0018] Optionally, a positioning step is provided at the valve port, a positioning ring is connected to the airbag, and the positioning ring is sleeved on the positioning step.
[0019] By adopting the above technical solution, when installing the airbag, the staff can use the cooperation of the positioning step and the positioning ring to limit the installation position of the airbag, thereby facilitating the loading and unloading of the airbag.
[0020] Optionally, a sealing block is connected to the position of the airbag corresponding to the inlet chamber, and when the airbag blocks the inlet chamber, the sealing block covers the outlet end of the inlet chamber.
[0021] By adopting the above technical solution, the staff uses the sealing block to seal the outlet end of the inlet cavity, which further improves the sealing performance when sealing the inlet cavity.
[0022] Optionally, a spacer ring is connected to the inner wall of the airbag near the air inlet.
[0023] By adopting the above technical solution, when the airbag shrinks, the air inlet is close to the inner wall of the airbag. When the pressure in the outlet cavity increases, the air inlet of the airbag is close to the inner wall of the airbag, and the gas at the outlet cavity may not be able to smoothly enter the airbag from the air inlet, resulting in the airbag being unable to expand smoothly. The staff passes through the spacer, and when the airbag shrinks, the spacer hits the inner wall of the airbag, thereby leaving a gap for the air inlet. When the pressure in the outlet cavity increases, the gas can smoothly pass through the gap and enter the airbag, allowing the airbag to expand better.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] 1. The staff uses the installation component to install the airbag at the valve mouth. When discharging sewage, the external vacuum pump creates a negative pressure in the outlet chamber, and the sewage and water are moved by the traction force to push open the side wall of the airbag, so that the inlet chamber and the outlet chamber are connected. After the sewage and water pass through the airbag, the airbag is pressed against the inlet chamber by the pressure of the outlet chamber; when the pressure of the outlet chamber increases, the odorous gas enters the airbag from the air inlet, and the airbag expands, one side fits the installation component and the other side fits the inlet chamber, both of which achieve the effect of blocking the valve mouth of the sewage pipe. The staff uses the deformation of the airbag to block the sewage pipe under positive and negative pressure conditions. Compared with the existing technology that blocks odorous gases through two structures, the structure is simpler, reducing the manufacturing cost of the pressure protection valve, and the size of the internal channel of the sewage pipe remains unchanged, reducing the possibility of sewage blocking the sewage pipe, ensuring smooth sewage discharge from the sewage pipe, and improving the applicability of the pressure protection valve;
[0026] 2. When installing the airbag, the staff placed the airbag at the valve port, then covered the valve port with the valve cover to restrict the airbag, then wrapped the valve cover with the fixing half ring and the locking half ring, and finally restricted the locking half ring with the locking assembly to achieve the installation of the airbag;
[0027] 3. When limiting the locking half-ring, the staff will insert the plug-in block into the plug-in slot. During this process, the fixed teeth will contact the locking teeth, and the locking teeth will rotate until the locking half-ring wraps the valve cover tightly, the locking teeth will contact the fixed teeth, and the contact plane will contact the side wall of the plug-in slot, thereby limiting the movement of the plug-in block and achieving the effect of limiting the locking half-ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the overall structure of the pressure protection valve in the embodiment of the present application.
[0029] Figure 2 It is an exploded diagram used to illustrate the structure of the protection valve in the embodiment of the present application.
[0030] Figure 3 It is a cross-sectional view used to illustrate the protection valve structure in the embodiment of the present application.
[0031] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0032] Figure 5 It is an exploded view used to illustrate the structure of the locking assembly in the embodiment of the present application.
[0033] Figure 6 It is a cross-sectional view used to illustrate the structure of the locking assembly in the embodiment of the present application.
[0034] Explanation of the reference numerals in the accompanying drawings: 1. drain pipe; 11. valve port; 12. block; 13. positioning step; 14. inlet chamber; 15. outlet chamber; 2. air bag; 21. positioning ring; 22. sealing block; 23. spacer; 3. mounting assembly; 31. valve cover; 311. vent hole; 32. valve hoop; 321. fixing half ring; 322. locking half ring; 3221. plug-in block; 4. locking assembly; 41. fixing block; 411. plug-in groove; 42. locking tooth; 421. interference plane; 422. toggle rod; 43. fixing tooth. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-6 This application is described in further detail.
[0036] The embodiment of the present application discloses a pressure protection valve. Figure 1 , Figure 2 and Figure 3 The pressure protection valve comprises a sewage pipe 1 and an air bag 2. The sewage pipe 1 is provided with a valve port 11, and a positioning step 13 is provided at the valve port 11. A stopper 12 is fixedly connected to the position of the sewage pipe 1 corresponding to the valve port 11, and the stopper 12 divides the interior of the sewage pipe 1 into an inlet cavity 14 and an outlet cavity 15, and the inlet cavity 14 is located above the outlet cavity 15.
[0037] Reference Figure 3 and Figure 4 A positioning ring 21 is fixedly connected to the airbag 2, and the airbag 2 is sleeved on the positioning step 13 through the positioning ring 21. A sealing block 22 is fixedly connected to the position of the airbag 2 surface corresponding to the inlet cavity 14. The sealing block 22 is a rubber block. When the inlet cavity 14 is blocked, the sealing block 22 covers the outlet end of the inlet cavity 14. An air inlet is opened at the position of the airbag 2 surface corresponding to the outlet cavity 15. A spacer 23 is fixedly connected to the position of the inner wall of the airbag 2 near the air inlet. The spacer 23 is used to keep a gap between the air inlet and the inner wall of the airbag 2.
[0038] Reference Figure 2 , Figure 3 and Figure 4 The sewage pipe 1 is provided with a mounting assembly 3, which includes a valve cover 31 and a valve hoop 32. The valve cover 31 is sleeved on the positioning step 13, the positioning ring 21 is located between the positioning step 13 and the valve hoop 32, and the valve cover 31 is provided with a vent hole 311, which is used to balance the pressure at the valve port 11.
[0039] Reference Figure 2 , Figure 5 and Figure 6The valve hoop 32 includes a fixed half ring 321 and a locking half ring 322, and the locking half ring 322 is hinged to the fixed half ring 321. The locking half ring 322 and the fixed half ring 321 form a full circle and wrap the positioning step 13 and the valve cover 31. A locking assembly 4 is provided on the fixed half ring 321, and the locking assembly 4 includes a fixed block 41, a locking tooth 42 and a fixed tooth 43. The fixed block 41 is fixedly connected to the fixed half ring 321, and a plug-in groove 411 is provided on the fixed block 41. A contact plane 421 is provided on the locking tooth 42, and the locking tooth 42 is hinged on the inner wall of the plug-in groove 411. A toggle rod 422 is fixedly connected to the locking tooth 42, and a toggle groove is provided at the position of the fixed block 41 corresponding to the toggle rod 422, and the toggle rod 422 passes through the toggle groove and extends to the outside of the fixed block 41.
[0040] Reference Figure 5 and Figure 6 A plug-in block 3221 is fixedly connected to the locking half ring 322, and the plug-in block 3221 is plugged and tightly fitted into the plug-in groove 411. A plurality of fixed teeth 43 are fixedly connected to the plug-in block 3221. When the locking half ring 322 is restricted, the locking teeth 42 press against the fixed teeth 43, and the contact plane 421 fits against the side wall of the plug-in groove 411.
[0041] When limiting the locking half ring 322, the staff inserts the plug-in block 3221 into the plug-in groove 411. During this process, the locking tooth 42 abuts against the fixed tooth 43 and rotates until the locking half ring 322 abuts against the valve cover 31. At this time, the locking tooth 42 abuts against the fixed tooth 43, and the abutting plane 421 fits against the side wall of the plug-in groove 411, thereby limiting the movement of the plug-in block 3221 and achieving the effect of limiting the locking half ring 322; when removing the valve hoop 32, the staff moves the toggle rod 422 to drive the locking tooth 42 to rotate to disengage from the fixed tooth 43, and the valve hoop 32 can be removed.
[0042] The implementation principle of a pressure protection valve in an embodiment of the present application is as follows: the staff sleeves the positioning ring 21 on the positioning step 13, then sleeves the valve cover 31 on the positioning ring 21, and finally wraps the valve cover 31 with the fixing half ring 321 and the locking half ring 322, so that the plug-in block 3221 is inserted into the plug-in groove 411. During this process, the locking tooth 42 abuts against the fixing tooth 43 and rotates until the locking half ring 322 abuts against the valve cover 31. At this time, the locking tooth 42 abuts against the fixing tooth 43, and the abutting plane 421 abuts against the side wall of the plug-in groove 411, thereby limiting the movement of the plug-in block 3221 to install the airbag 2; when removing the airbag 2, the staff moves the toggle rod 422 to drive the locking tooth 42 to rotate to disengage from the fixing tooth 43, thereby removing the valve hoop 32 and removing the valve cover 31 and the airbag 2 at the same time, thereby achieving the effect of loading and unloading the airbag 2.
[0043] When discharging sewage, the outlet chamber 15 is at negative pressure, and the sewage and water will push open the side wall of the airbag 2 and enter the outlet chamber 15 from the inlet chamber 14. After the sewage leaves, the airbag 2 is affected by the negative pressure of the outlet chamber 15 and is tightly attached to the inlet chamber 14 and the outlet chamber 15, and the sealing block 22 blocks the outlet end of the inlet chamber 14; when the pressure of the outlet chamber 15 increases, gas in the outlet chamber 15 enters the interior of the airbag 2 from the air inlet, causing the airbag 2 to expand and fit the inlet chamber 14, thereby achieving the sealing of the inlet chamber 14.
[0044] The staff uses the deformation of the airbag 2 to block the sewage pipe 1 under positive pressure and negative pressure conditions inside the sewage pipe 1. Compared with the existing technology of blocking odorous gases through two structures, the structure is simpler, which reduces the manufacturing cost of the pressure protection valve. The size of the internal channel of the sewage pipe 1 remains unchanged, reducing the possibility of dirt clogging the sewage pipe 1, ensuring smooth sewage discharge from the sewage pipe 1, and improving the applicability of the pressure protection valve.
[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A pressure protection valve, characterized in that: The invention comprises a sewage pipe (1) and an air bag (2), wherein the sewage pipe (1) is provided with a valve port (11), a stopper (12) is connected to a position inside the sewage pipe (1) close to the valve port (11), the stopper (12) divides the inside of the sewage pipe (1) into an inlet chamber (14) and an outlet chamber (15), the air bag (2) is arranged at the valve port (11), an air inlet is opened at a position of the air bag (2) corresponding to the outlet chamber (15), and a mounting component (3) for limiting the air bag (2) is provided on the sewage pipe (1).
2. The pressure protection valve according to claim 1, characterized in that: The mounting assembly (3) comprises a valve cover (31) and a valve hoop (32); the valve cover (31) is mounted at the valve port (11); the airbag (2) is located between the sewage pipe (1) and the valve cover (31); the valve hoop (32) comprises a fixing half ring (321) and a locking half ring (322); the fixing half ring (321) is rotatably connected to the locking half ring (322); a locking assembly (4) for locking the locking half ring (322) is provided on the fixing half ring (321); when the airbag (2) is locked, the valve cover (31) is connected to the valve port (11) through the valve hoop (32); and the airbag (2) is located between the valve port (11) and the valve cover (31).
3. The pressure protection valve according to claim 2, characterized in that: The locking assembly (4) comprises a fixing block (41), a locking tooth (42) and a fixing tooth (43); the fixing block (41) is connected to the fixing half ring (321); a plug-in groove (411) is provided on the fixing block (41); the locking tooth (42) is rotatably connected in the plug-in groove (411); a contact plane (421) is provided on the locking tooth (42); a plug-in block (3221) is connected to the locking half ring (322); the fixing tooth (43) is connected to a plurality of blocks on the plug-in block (3221); when the valve cover (31) is installed, the plug-in block (3221) is plugged and fitted in the plug-in groove (411); the locking tooth (42) is pressed against the fixing tooth (43); and the contact plane (421) is pressed against the side wall of the plug-in groove (411).
4. The pressure protection valve according to claim 3, characterized in that: A toggle groove is formed on the fixed block (41) at a position corresponding to the locking tooth (42); a toggle rod (422) is connected to the locking tooth (42); the toggle rod (422) passes through the toggle groove and extends to the outside of the fixed block (41).
5. The pressure protection valve according to claim 2, characterized in that: The valve cover (31) is provided with a vent hole (311).
6. The pressure protection valve according to claim 2, characterized in that: A positioning step (13) is provided at the valve port (11), a positioning ring (21) is connected to the air bag (2), and the positioning ring (21) is sleeved on the positioning step (13).
7. The pressure protection valve according to claim 1, characterized in that: A sealing block (22) is connected to the airbag (2) at a position corresponding to the inlet chamber (14); when the airbag (2) blocks the inlet chamber (14), the sealing block (22) covers the outlet end of the inlet chamber (14).
8. The pressure protection valve according to claim 1, characterized in that: A spacer (23) is connected to the inner wall of the air bag (2) at a position close to the air inlet.