Channel self-operated check valve

Abstract

The channel self-operated check valve comprises a mounting flange fixedly mounted on a canal pipeline, a mounting frame located on the inner side of the canal pipeline is mounted on the side face of the mounting flange, a protective sleeve is fixedly mounted on the inner side of the mounting frame, and a connecting guide rod is slidably mounted in the protective sleeve in a penetrating mode; a first spring is fixedly installed in the protective sleeve, the first spring and a connecting block fixedly installed outside the connecting guide rod are fixedly installed, and a valve top cover is installed at the front end of the connecting guide rod. According to the channel self-operated check valve, the novel structural design is adopted, the valve top cover is connected with the connecting base at the top end of the connecting guide rod, when the first sealing ring and the second sealing ring need to be detached and replaced, bolts of the fixing gland are loosened, the fixing gland is taken down, then the valve top cover can be taken down, and the first sealing ring and the second sealing ring are replaced; the whole valve does not need to be replaced in the process, and operation is convenient and fast.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, specifically a channel self-regulating check valve. Background Technology

[0002] In water conservancy drainage systems, check valves are often installed at the outlet of drainage pipes to prevent backflow of external water. Common check valves include swing check valves and piston check valves.

[0003] In the prior art, Chinese patent application number CN201810651949.6 discloses a swing check valve, including a valve plate and a valve body with a hollow structure. The hollow structure penetrates the valve body and forms a fluid cavity. The valve plate is located in the fluid cavity and is pivotally connected to the valve body around a pivot line. The pivot line divides the valve plate into a first part for opening and closing the fluid cavity and a second part for counterweighting the first part. Under the combined action of the first torque of gravity on the first part relative to the pivot line and the second torque of gravity on the second part relative to the pivot line, the valve plate always has a tendency to rotate to close or open the fluid cavity, so as to realize the opening or closing of the fluid cavity by the counterweight between the first part and the second part.

[0004] For example, in the prior art, Chinese patent application number CN201710569766.5 discloses a piston-type swing check valve, including a housing, a valve cover assembly, and a suspension bracket. The housing has an inlet pipe and an outlet pipe at both ends, with an assembly hole between the inlet pipe and the outlet pipe. A valve seat is provided at the end of the inlet pipe, and a valve cover assembly is provided at the right end of the valve seat. The valve cover assembly has a radial sealing surface, which fits against the end face of the inlet pipe during sealing. The valve seat has a circular groove around the inlet pipe, and the valve cover assembly has a circular convex ring that mates with the circular groove. The upper end of the valve cover assembly is connected to the suspension bracket via a movable pin, and the suspension bracket is fixed to the housing. The suspension bracket has an elongated suspension hole, and the movable pin is located in the elongated suspension hole and perpendicular to it. The movable pin can move along the length of the elongated suspension hole.

[0005] For example, in the prior art, Chinese patent application number CN201410400281.X discloses a silent piston-type check valve, which includes a valve left channel and a valve right channel, with a channel connection port between the two valve channels. The channel connection port is opened and closed by a piston-type valve disc. A piston cylinder is provided between the two valve channels, and the piston-type valve disc is located inside the piston cylinder. A ball-shaped check valve and several throttling plugs are installed on the upper part of the piston-type valve disc, and the lower part of the piston-type valve disc cooperates with the channel connection port.

[0006] Based on the above information, it can be seen that in the existing technology of check valves, whether swing or piston type, the sealing ring used for sealing is installed inside the valve body. During long-term use, the sealing ring needs to be inspected and replaced regularly. This requires disassembling the entire valve to perform the replacement operation, which is complex and time-consuming. Summary of the Invention

[0007] The purpose of this invention is to provide a channel self-regulating check valve to solve the problem mentioned in the background art that the operation of sealing ring maintenance and replacement is complicated and time-consuming.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a channel self-regulating check valve, comprising an installation flange fixedly installed to a water channel pipeline, an installation bracket located inside the water channel pipeline installed on the side of the installation flange, a protective sleeve fixedly installed inside the installation bracket, a connecting guide rod slidably installed through the protective sleeve, and a first spring fixedly installed inside the protective sleeve, the first spring being fixedly installed with a connecting block fixedly installed outside the connecting guide rod, a valve top cover installed at the front end of the connecting guide rod, when the external water pressure is greater than the elastic force of the first spring, the valve top cover is pushed under the action of water pressure, automatically closing the valve, and the valve top cover is connected to a connecting seat fixedly installed at the top end of the connecting guide rod through a disassembly and assembly mechanism to form a disassembly and assembly structure, an absorbent sponge with a ring structure fixedly installed inside the installation bracket, and the absorbent sponge contacting the outer surface of the connecting guide rod, using the absorbent sponge to absorb lubricating oil, when the connecting guide rod slides back and forth, the absorbent sponge evenly applies lubricating oil to the outer surface of the connecting guide rod, achieving the purpose of lubricating the surface of the connecting guide rod, and an oil supply mechanism inside the connecting seat replenishes lubricating oil to the absorbent sponge.

[0009] Preferably, the disassembly and assembly mechanism includes a fixed pressure cover installed on the outside of the valve top cover, and the fixed pressure cover is connected to the connecting seat by bolts. After loosening the bolts of the fixed pressure cover and removing the fixed pressure cover, the valve top cover can be removed to replace the first sealing ring and the second sealing ring. This process does not require the entire valve to be replaced, and the operation is convenient and quick.

[0010] Preferably, the valve top cover is configured as an arc-shaped structure, and a first sealing ring that seals with the inner wall of the valve top cover is fixedly installed on the outer surface of the connecting seat.

[0011] Preferably, a second sealing ring is fixedly installed on the inner edge of the valve top cover using a pressure plate, and the second sealing ring corresponds to the sealing boss fixedly installed on the outer surface of the mounting flange. When the valve is closed, the second sealing ring on the inner side of the valve top cover fits against the sealing boss on the outer side of the mounting flange to achieve the purpose of sealing.

[0012] Preferably, the oil supply mechanism includes a storage chamber disposed inside the connecting seat, and the front end of the connecting seat has a filling hole communicating with the storage chamber, and the filling hole is sealed to the inner wall of the valve top cover.

[0013] Preferably, the rear end of the connecting seat has a docking hole communicating with the storage compartment, and the position of the docking hole corresponds to the position of the connecting pipe. The connecting pipe is fixedly installed with the mounting bracket, the rear end of the connecting pipe extends into the interior of the absorbent sponge, and the front end of the connecting pipe has a hole structure with equal spacing. The connecting pipe on the outside of the mounting bracket is inserted into the docking hole on the side of the connecting seat. At this time, the lubricating oil in the storage compartment flows into the absorbent sponge through the hole on the side of the connecting pipe, thereby automatically adding lubricating oil to the absorbent sponge.

[0014] Preferably, a longitudinally arranged connecting rod is installed inside the storage compartment, and sealing blocks are fixedly installed at both ends of the connecting rod, and the sealing blocks correspond to the docking holes to form a sealing structure.

[0015] Preferably, a horizontally arranged guide slide rod is fixedly installed inside the storage compartment, and the connecting rod and the guide slide rod form a through sliding structure. A second spring is installed on the outside of the guide slide rod. The elastic force of the second spring is used to squeeze the connecting rod to reset the sealing block to the position of sealing with the docking hole. Under the elastic action of the second spring, the connecting rod is pushed to move relative to the guide slide rod, thereby moving the sealing blocks at the upper and lower ends of the connecting rod to the docking hole position, so as to achieve the purpose of automatically sealing the docking hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the self-regulating check valve for this channel adopts a novel structural design, the specific details of which are as follows: 1. Under normal circumstances, the connecting guide rod moves through the connecting block under the elastic action of the first spring, thereby pushing the valve top cover to move and making the valve top cover open. When the external water pressure is greater than the elastic force of the first spring, the valve top cover is pushed under the action of water pressure, and the valve is automatically closed. When the valve is closed, the second sealing ring on the inner side of the valve top cover fits against the sealing boss on the outer side of the mounting flange to achieve the purpose of sealing. Furthermore, the valve top cover is connected to the connecting seat at the top of the connecting guide rod. When it is necessary to disassemble and replace the first and second sealing rings, the valve top cover can be removed after loosening the bolts of the fixing gland and taking off the fixing gland. The first and second sealing rings can then be replaced. This process does not require the entire valve to be replaced, making the operation convenient and quick.

[0017] 2. An absorbent sponge is fixedly installed inside the mounting bracket. The absorbent sponge absorbs lubricating oil. When the connecting guide rod slides back and forth, the absorbent sponge evenly applies lubricating oil to the outer surface of the connecting guide rod, thereby achieving the purpose of lubricating the surface of the connecting guide rod and reducing the possibility of rust and jamming when the device is immersed in water for a long time. Furthermore, a storage chamber is provided inside the connecting seat. Lubricating oil is added to the storage chamber through the filling hole. When the valve cover is in the closed state, the connecting pipe on the outside of the mounting bracket is inserted into the docking hole on the side of the connecting seat. At this time, the lubricating oil in the storage chamber flows into the absorbent sponge through the hole on the side of the connecting pipe, thereby automatically adding lubricating oil to the absorbent sponge to achieve continuous lubrication. When the valve top cover is in the open state, the connecting rod is pushed to move relative to the guide slide rod under the elastic action of the second spring, thereby moving the sealing blocks at both ends of the connecting rod to the docking hole position to achieve the purpose of automatic sealing of the docking hole. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall installation structure of the present invention; Figure 2 This is a schematic diagram of the mounting frame structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the protective sleeve of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the connection relationship between the connecting seat and the valve top cover of the present invention; Figure 6 This is a schematic diagram of the installation position of the adsorption sponge in this invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the internal structure of the connector of the present invention; Figure 9 This is a schematic diagram of the connection relationship between the connecting pipe and the storage compartment of the present invention.

[0019] In the diagram: 1. Mounting flange; 2. Water channel pipe; 3. Mounting bracket; 4. Protective sleeve; 5. Connecting guide rod; 6. Valve top cover; 7. First spring; 8. Connecting block; 9. Connecting seat; 901. First sealing ring; 10. Fixing gland; 11. Second sealing ring; 12. Sealing boss; 13. Absorbent sponge; 14. Connecting pipe; 15. Storage compartment; 16. Filling hole; 17. Butt hole; 18. Connecting rod; 19. Sealing block; 20. Guide slide rod; 21. Second spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-5 To facilitate the disassembly and replacement of the sealing ring, this embodiment provides the following technical solution, specifically disclosing: A mounting flange 1 is fixedly installed with the water channel pipe 2. A mounting bracket 3 is installed on the side of the mounting flange 1, located inside the water channel pipe 2. A protective sleeve 4 is fixedly installed inside the mounting bracket 3, and a connecting guide rod 5 is slidably installed through the protective sleeve 4. A first spring 7 is fixedly installed inside the protective sleeve 4. The first spring 7 is fixedly installed with a connecting block 8 fixedly installed outside the connecting guide rod 5. A valve top cover 6 is installed at the front end of the connecting guide rod 5, and the valve top cover 6... The disassembly and assembly mechanism and the connecting seat 9 fixedly installed at the top of the connecting guide rod 5 form a disassembly and assembly structure. The disassembly and assembly mechanism includes a fixed pressure cover 10 installed on the outside of the valve top cover 6, and the fixed pressure cover 10 is connected to the connecting seat 9 by bolts. The valve top cover 6 is set as an arc-shaped structure, and a first sealing ring 901 that seals with the inner wall of the valve top cover 6 is fixedly installed on the outer surface of the connecting seat 9. A second sealing ring 11 is fixedly installed on the inner edge of the valve top cover 6 by a pressure plate, and the second sealing ring 11 corresponds to the sealing boss 12 fixedly installed on the outer surface of the mounting flange 1.

[0022] The mounting flange 1 is fixed to the water channel pipe 2 by bolts. When the external water pressure of the water channel pipe 2 is lower than the elastic force of the first spring 7, the connecting guide rod 5 moves through the connecting block 8 under the elastic force of the first spring 7. This pushes the valve top cover 6 with the connecting guide rod 5. At this time, the valve top cover 6 is in a position away from the water channel pipe 2, and the valve is in the open state, allowing water in the water channel pipe 2 to flow out. When the external water pressure of the water channel pipe 2 is greater than the elastic force of the first spring 7, the valve top cover 6 moves closer to the water channel pipe 2 under the action of water pressure. Finally, the second sealing ring 11 on the inner side of the valve top cover 6 moves to a position close to the sealing boss on the outer surface of the mounting flange 1. A seal is formed at position 12, achieving the effect of automatically closing the valve. When the valve needs to be replaced after long-term use, the operator can use tools to remove the external bolts of the fixing cover 10 (which pass through the valve top cover 6 and are fixed to the connecting seat 9) while the valve is in the open position. Then, the fixing cover 10 is removed, and the valve top cover 6 is removed. The first sealing ring 901 on the outside of the connecting seat 9 and the second sealing ring 11 on the inside of the valve top cover 6 are replaced. After the replacement is completed, the fixing cover 10 is used to fix it again. The entire process does not require the valve to be removed from the water channel pipe 2, making the operation convenient and quick.

[0023] Example 2: Please refer to Figures 6-9 To achieve automatic lubrication, this embodiment provides the following technical solution: A ring-shaped absorbent sponge 13 is fixedly installed inside the mounting bracket 3, and the absorbent sponge 13 contacts the outer surface of the connecting guide rod 5. An oil supply mechanism inside the connecting seat 9 replenishes lubricating oil to the absorbent sponge 13. The oil supply mechanism includes a storage chamber 15 located inside the connecting seat 9. A filling hole 16 communicating with the storage chamber 15 is opened at the front end of the connecting seat 9, and the filling hole 16 is sealed against the inner wall of the valve top cover 6. A docking hole 17 communicating with the storage chamber 15 is opened at the rear end of the connecting seat 9, and the position of the docking hole 17 corresponds to the position of the connecting pipe 14. The connecting pipe 14 and the mounting bracket... 3. Fixed installation: The rear end of the connecting tube 14 extends into the interior of the absorbent sponge 13, and the front side of the connecting tube 14 has equally spaced holes. The storage compartment 15 is equipped with a longitudinally arranged connecting rod 18, and the upper and lower ends of the connecting rod 18 are fixedly installed with sealing blocks 19. The sealing blocks 19 correspond to the docking holes 17 and form a sealing structure. The storage compartment 15 is equipped with a transversely arranged guide slide rod 20, and the connecting rod 18 and the guide slide rod 20 form a through sliding structure. A second spring 21 is installed on the outside of the guide slide rod 20. The elastic force of the second spring 21 is used to squeeze the connecting rod 18 to reset the sealing block 19 to the position that seals with the docking hole 17.

[0024] When the valve switches between open and closed states, the connecting guide rod 5 slides back and forth relative to the mounting bracket 3. At this time, the absorbent sponge 13 fixed inside the mounting bracket 3 applies lubricating oil to the outer surface of the connecting guide rod 5 to achieve automatic lubrication. When the valve top cover 6 moves to the closed state, the connecting pipe 14 on the side of the mounting bracket 3 is inserted into the mating hole 17 on the side of the connecting seat 9. At this time, the connecting pipe 14 pushes open the sealing block 19 at the mating hole 17, and the connecting pipe 14 communicates with the storage chamber 15 (lubricating oil is added to the storage chamber 15 through the filling hole 16). At this time, the lubricating oil in the storage chamber 15 flows into the adsorption sponge 13 through the hole structure on the side of the connecting pipe 14, so as to automatically replenish the lubricating oil in the adsorption sponge 13. When the valve top cover 6 moves away from the mounting flange 1, the connecting pipe 14 moves out of the docking hole 17. At this time, under the elastic action of the second spring 21, the connecting rod 18 is pushed to move, so that the connecting rod 18 slides through the guide slide rod 20. Finally, the sealing block 19 is moved to the docking hole 17 through the connecting rod 18, and the docking hole 17 is automatically sealed.

[0025] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A channel self-regulating check valve, comprising a mounting flange (1) fixedly installed with a water channel pipe (2), wherein a mounting bracket (3) located inside the water channel pipe (2) is mounted on the side of the mounting flange (1), characterized in that, Also includes: A protective sleeve (4) is fixedly installed inside the mounting bracket (3), and a connecting guide rod (5) is slidably installed through the protective sleeve (4). A first spring (7) is fixedly installed inside the protective sleeve (4), and the first spring (7) is fixedly installed with a connecting block (8) fixedly installed outside the connecting guide rod (5). The front end of the connecting guide rod (5) is equipped with a valve top cover (6), and the valve top cover (6) is connected to the connecting seat (9) fixedly installed at the top of the connecting guide rod (5) through a disassembly and assembly mechanism to form a disassembly and assembly structure. The mounting bracket (3) has a ring-shaped absorbent sponge (13) fixedly installed inside, and the absorbent sponge (13) is in contact with the outer surface of the connecting guide rod (5). The oil supply mechanism inside the connecting seat (9) replenishes lubricating oil to the absorbent sponge (13).

2. The channel self-regulating check valve according to claim 1, characterized in that: The disassembly and assembly mechanism includes a fixed pressure cap (10) installed on the outside of the valve top cover (6), and the fixed pressure cap (10) is connected to the connecting seat (9) by bolts.

3. A channel self-regulating check valve according to claim 2, characterized in that: The valve top cover (6) is configured as an arc-shaped structure, and the outer surface of the connecting seat (9) is fixedly installed with a first sealing ring (901) that seals the inner wall of the valve top cover (6).

4. A channel self-regulating check valve according to claim 3, characterized in that: The valve top cover (6) has a second sealing ring (11) fixedly installed on the inner edge using a pressure plate, and the second sealing ring (11) corresponds to the sealing boss (12) fixedly installed on the outer surface of the mounting flange (1).

5. A channel self-regulating check valve according to claim 1, characterized in that: The oil supply mechanism includes a storage chamber (15) located inside the connecting seat (9). The front end of the connecting seat (9) has an injection hole (16) that communicates with the storage chamber (15), and the injection hole (16) is sealed to fit the inner wall of the valve top cover (6).

6. A channel self-regulating check valve according to claim 5, characterized in that: The rear end of the connecting seat (9) is provided with a docking hole (17) that communicates with the storage compartment (15), and the position of the docking hole (17) corresponds to the position of the connecting pipe (14). The connecting pipe (14) is fixedly installed with the mounting bracket (3).

7. A channel self-regulating check valve according to claim 6, characterized in that: The rear end of the connecting tube (14) extends into the interior of the absorbent sponge (13), and the front side of the connecting tube (14) is provided with equally spaced holes.

8. A channel self-regulating check valve according to claim 7, characterized in that: The storage compartment (15) is equipped with a longitudinally arranged connecting rod (18), and the upper and lower ends of the connecting rod (18) are fixedly installed with sealing blocks (19), and the sealing blocks (19) correspond to the docking holes (17) and form a sealing structure.

9. A channel self-regulating check valve according to claim 8, characterized in that: The storage compartment (15) is fixedly installed with a horizontally arranged guide slide rod (20), and the connecting rod (18) and the guide slide rod (20) form a through sliding structure.

10. A channel self-regulating check valve according to claim 9, characterized in that: The guide slide (20) is externally equipped with a second spring (21). The elastic force of the second spring (21) is used to press the connecting rod (18) to reset the sealing block (19) to the position where it seals with the docking hole (17).

Images