Active check valve applied to high-pressure fluid

Abstract

The invention relates to the technical field of check valves, in particular to an active check valve applied to high-pressure fluid, which comprises a valve body, the interior of the valve body is divided into a front chamber and a rear chamber, the front chamber and the rear chamber are communicated through a water through groove, a valve clack matched with the water through groove is arranged in the rear chamber, and the valve clack is rotatably connected with the top of the inner wall of the rear chamber. The front end, the rear end and the side wall of the valve body are communicated with a water inlet pipe, a first water outlet pipe and a second water outlet pipe respectively, the ends, away from the valve body, of the first water outlet pipe and the second water outlet pipe are communicated with a terminal housing and a transfer housing respectively, and the terminal housing and the transfer housing are fixedly connected with the outer side wall of the valve body through corresponding supporting rods. Compared with the prior art, the condition of sudden pressure increase in the valve body can be timely and effectively handled, safe and stable operation of equipment is guaranteed, a circulation pipeline can be automatically adjusted according to the actual condition, and the fluid conveying efficiency and flexibility are improved.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, in particular to an active check valve applied to high-pressure fluids. Background Art

[0002] A check valve, also known as a non-return valve, relies on the power of the fluid itself and the design of the valve disc to achieve unidirectional conduction. When the fluid flows in the specified direction, the fluid pressure overcomes the spring resistance or relies on its own impact force to push open the valve disc. The check valve is in an open state and has almost no obstruction to the flow of the fluid. When the fluid tries to flow in the opposite direction, the fluid pressure will make the valve disc fit tightly against the valve seat, blocking the reverse flow, preventing the fluid in the pipeline from flowing back, and protecting the equipment and system from damage caused by the reverse flow.

[0003] The Chinese patent with application number 2019110752074 is specifically a liquid check valve, which is achieved by arranging multiple baffles at different angles inside the valve body, which can play a role of diversion and effectively block the liquid to prevent it from flowing into corners or gaps and accumulating, thereby affecting the normal use of the check valve. By arranging a pressure relief semipermeable membrane on the second baffle and the third baffle, and cooperating with a pressure relief hole opened on the top of the valve body, the pressure in the valve body can be reduced while blocking the flow, thereby achieving the purpose of protecting its internal structure.

[0004] However, during the actual use of the above patent, it is unable to cope with the situation where the internal pressure of the check valve suddenly increases due to the inability of the valve disc to open. On the one hand, the continuous increase in pressure may damage the structure of the check valve itself, causing the valve body to deform or rupture, further affecting the stability and safety of the entire fluid delivery system. On the other hand, the sudden increase in pressure will affect the normal operation of other equipment connected to it, increasing the risk of equipment failure.

[0005] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0006] The object of the present invention is to provide an active check valve for high-pressure fluid, so as to solve the problems mentioned in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an active check valve for high-pressure fluid, comprising a valve body, the interior of the valve body being divided into a front chamber and a rear chamber, the front chamber and the rear chamber being connected via a water-passing groove, the interior of the rear chamber being provided with a valve flap matched with the water-passing groove, the valve flap being rotatably connected to the top of the inner wall of the rear chamber;

[0008] The front end, rear end and side wall of the valve body are respectively connected to a water inlet pipe, a water outlet pipe 1 and a water outlet pipe 2; the ends of the water outlet pipe 1 and the water outlet pipe 2 away from the valve body are respectively connected to a terminal cover shell and a transfer cover shell; the terminal cover shell and the transfer cover shell are fixedly connected to the outer side wall of the valve body through corresponding support rods; the top and side walls of the valve body are provided with adjustment components.

[0009] Furthermore, a bracket 1 and a bracket 2 are fixedly mounted on the top of the valve body and the top of the side wall, respectively, and the adjustment assembly includes a swing frame 1 and a swing frame 2, the middle part of the swing frame 1 is rotatably connected to the bracket 1, the middle part of the swing frame 2 is rotatably connected to the bracket 2, and both ends of the swing frame 1 and the swing frame 2 are provided with driving grooves;

[0010] The two side walls of the valve body are fixedly connected with sleeves by bolts, and the two sleeves are respectively slidably connected with terminal rods and transfer rods. The top ends of the terminal rods and transfer rods are fixedly connected with drive blocks 1 that match the corresponding drive grooves on both sides.

[0011] Furthermore, the top of the valve body is fixedly connected to a limiting cylinder, the limiting cylinder is slidably connected to a limiting rod, the top of the limiting rod is fixedly connected to a right-angle push plate, the tops of both ends of the right-angle push plate are fixedly connected to push rods, and both sides of the top of the push rod are fixedly connected to drive blocks 2 that match the corresponding drive grooves.

[0012] Furthermore, an extrusion cover is fixedly installed on the top of the inner wall of the front chamber, the extrusion cover is connected to the limiting cylinder, the inside of the extrusion cover is slidably connected to an extrusion plate, a sealing ring is installed on the outside of the extrusion plate, and the bottom end of the limiting rod penetrates the valve body and is fixedly connected to the top of the extrusion plate;

[0013] The outer side of the portion of the limiting rod located at the extrusion cover is sleeved with a compression spring, and the two ends of the compression spring are respectively fixedly connected to the extrusion cover and the extrusion plate.

[0014] Furthermore, the outer sides of the terminal cover and the transfer cover are respectively connected with conduit one and conduit two, the two side walls of the terminal cover and the transfer cover are provided with water guiding channels, and the tops of the terminal cover and the transfer cover are provided with movable grooves, and a ferrule is fixedly connected in the movable groove.

[0015] Furthermore, a rotating shaft is movably connected inside the ferrule via a bearing, and water-blocking plates for blocking the water guiding channel are provided inside the terminal cover and the transfer cover, and the water-blocking plates are fixedly connected to the side walls of the rotating shaft, and flexible sealing covers for closing the ferrule are provided inside the terminal cover and the transfer cover.

[0016] Furthermore, a driving frame is arranged on the outer sides of the terminal cover and the transfer cover, and one end of the driving frame is fixedly connected to a corresponding side wall of the rotating shaft.

[0017] Furthermore, both sides of the bottom ends of the terminal rod and the transfer rod are fixedly connected with driving blocks three, and the driving blocks three are slidably connected in the corresponding driving frames.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In actual use, the present invention utilizes the characteristic that high-pressure fluid continuously accumulates in the front chamber, and an extrusion plate is arranged in the extrusion hood. When the high-pressure fluid accumulates to a certain extent in the front chamber, the extrusion plate will be continuously pushed. This continuous propulsion force will prompt the adjustment component to operate. During operation, the adjustment component will adaptively deflect the water-blocking plates inside the terminal cover and the transfer cover. Through this adaptive deflection, the internal pressure can be actively released, effectively solving the problem of sudden increase in internal pressure of the valve body due to a malfunction. At the same time, under the action of the adjustment component, the valve body can also be driven to adaptively switch the flow pipeline, so that the high-pressure fluid inside the valve body can be adaptively circulated, ensuring the safe and stable operation of the equipment and improving the efficiency and flexibility of fluid transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0021] Figure 1 It is a front view of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the valve body in the present invention;

[0023] Figure 3 It is a structural schematic diagram of the swing frame 2 in the present invention;

[0024] Figure 4 It is a schematic diagram of the transfer cover structure in the present invention;

[0025] Figure 5 It is a structural schematic diagram of a swing frame in the present invention;

[0026] Figure 6 It is a schematic diagram of the internal structure of the transfer housing in the present invention;

[0027] Figure 7 It is a front view of the internal structure of the extrusion cover in the present invention.

[0028] : 1. valve body; 201. front chamber; 202. rear chamber; 203. water channel; 3. valve disc; 401. water inlet pipe; 402. water outlet pipe 2; 501. terminal cover; 502. transfer cover; 601. conduit 1; 602. conduit 2; 603. water channel; 604. ferrule; 605. rotating shaft; 606. water baffle; 607. flexible sealing cover; 701. bracket 1; 702. bracket 2; 8. adjustment assembly; 801. swing frame 1; 802. swing frame 2; 803. drive block 1; 804. sleeve; 805. terminal rod; 806. transfer rod; 9. limit cylinder; 10. limit rod; 11. right-angle push plate; 12. push rod; 13. drive block 2; 14. extrusion cover; 15. extrusion plate; 16. drive frame. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: Figure 1-Figure 7 As shown, an active check valve for high-pressure fluid includes a valve body 1, the interior of the valve body 1 is divided into a front chamber 201 and a rear chamber 202, the front chamber 201 and the rear chamber 202 are connected through a water groove 203, a valve flap 3 matching the water groove 203 is arranged inside the rear chamber 202, the valve flap 3 is rotatably connected to the top of the inner wall of the rear chamber 202, and a torsion spring is arranged at the rotation connection between the valve flap 3 and the inner wall of the rear chamber 202. When the valve body 1 is no longer supplying water, the valve flap 3 re-closes the water groove 203 under the action of the torsion spring;

[0031] The front end, rear end and side wall of the valve body 1 are respectively connected with the water inlet pipe 401, the water outlet pipe 1 and the water outlet pipe 2 402, and the ends of the water outlet pipe 1 and the water outlet pipe 2 402 away from the valve body 1 are respectively connected with the terminal cover 501 and the transfer cover 502, and the terminal cover 501 and the transfer cover 502 are fixedly connected to the outer wall of the valve body 1 through corresponding support rods;

[0032] When the valve body 1 is operating normally, the liquid enters the front chamber 201 through the water inlet pipe 401 in turn, and the valve flap 3 is opened and deflected by the high-pressure impact of the liquid until the water channel 203 can pass the liquid normally. The liquid passes through the front chamber 201 and the water channel 203 into the rear chamber 202, and then flows into the terminal housing 501 through the water outlet pipe 1, and flows to the conduit 1 601 through the water guide channel 603, and then is transported to the designated position through the conduit 1 601;

[0033] When the valve body 1 is not used for a long time, the movement of the valve disc 3 may be blocked due to rust, accumulation of impurities, etc., and it is difficult to be flushed open by the fluid. If the fluid pressure in the front section continues to increase, and the valve body 1 cannot open to release the pressure, it may cause the pipeline, pump and other equipment to be subjected to excessive pressure, increasing the risk of equipment rupture and leakage. To solve this problem, the specific improvements are as follows:

[0034] The top and side wall of the valve body 1 are both provided with an adjustment component 8, and the top of the valve body 1 and the top of the side wall are respectively fixedly installed with a bracket 1 701 and a bracket 2 702, and the adjustment component 8 includes a swing frame 1 801 and a swing frame 2 802, the middle part of the swing frame 1 801 is rotatably connected to the bracket 1 701, and the middle part of the swing frame 2 802 is rotatably connected to the bracket 2 702, and both ends of the swing frame 1 801 and the swing frame 2 802 are provided with driving grooves;

[0035] The two side walls of the valve body 1 are fixedly connected with sleeves 804 by bolts, and the two sleeves 804 are respectively slidably connected with terminal rods 805 and transfer rods 806, and the top ends of the terminal rods 805 and the transfer rods 806 are fixedly connected with drive blocks 803 that match the corresponding drive grooves. The drive block 803 slides in the corresponding drive grooves, and the top of the valve body 1 is fixedly connected with a limiting cylinder 9, and the limiting rod 10 is slidably connected in the limiting cylinder 9. The top of the limiting rod 10 is fixedly connected with a right-angle push plate 11, and the tops of both ends of the right-angle push plate 11 are fixedly connected with push rods 12, and the top ends of the push rods 12 are fixedly connected with drive blocks 13 that match the corresponding drive grooves.

[0036] An extrusion cover 14 is fixedly installed on the top of the inner wall of the front chamber 201, the extrusion cover 14 is connected to the limiting cylinder 9, the inside of the extrusion cover 14 is slidably connected with an extrusion plate 15, and a sealing ring is installed on the outside of the extrusion plate 15. The bottom end of the limiting rod 10 penetrates the valve body 1 and is fixedly connected to the top of the extrusion plate 15. A compression spring is sleeved on the outside of the part of the limiting rod 10 located at the extrusion cover 14, and the two ends of the compression spring are respectively fixedly connected to the extrusion cover 14 and the extrusion plate 15. It should be noted here that the structures connected to the valve body 1 in the present invention are all sealed to avoid the problem of liquid leakage.

[0037] In the specific setting, when the valve flap 3 cannot be flushed open or cannot be completely flushed open due to spring corrosion or other problems, the pressure inside the front chamber 201 will gradually increase due to the continuous accumulation of high-pressure fluid, and the liquid cannot be discharged. At this time, the high-speed fluid inside the front chamber 201 will enter the extrusion cover 14 and continuously push the extrusion plate 15 to slide upward in the extrusion cover 14. During the upward movement, the extrusion plate 15 pushes the right-angle push plate 11 and the push rod 12 to continuously move upward through the limit rod 10. The push rod 12 uses the mutual cooperation of the driving block 2 13 and the driving groove to drive the swing frame 1 801 and the swing frame 2 802 to deflect in the bracket 1 701 and the bracket 2 702 respectively;

[0038] During the deflection process, the swing frame 1 801 and the swing frame 2 802 drive the terminal rod 805 and the transfer rod 806 to slide downward in the corresponding sleeve 804 through the cooperation between the driving block 1 803 and the corresponding driving groove.

[0039] Embodiment 2: The outer sides of the terminal housing 501 and the transfer housing 502 are respectively connected with a conduit 1 601 and a conduit 2 602, and both side walls of the terminal housing 501 and the transfer housing 502 are provided with a water channel 603. It should be noted that the positions of the water channel 603 provided on the side walls of the terminal housing 501 and the transfer housing 502 are as follows: Figure 1 As shown, the water channel 603 in the terminal housing 501 is on the same horizontal line as the conduit 1 601, and the water channel 603 in the transfer housing 502 is on the same horizontal line as the conduit 2 602, so that when the water channel 603 in the transfer housing 502 is gradually opened, the water channel 603 in the terminal housing 501 is gradually closed.

[0040] The tops of the terminal housing 501 and the transfer housing 502 are both provided with movable grooves, in which a ferrule 604 is fixedly connected, and a rotating shaft 605 is movably connected to the ferrule 604 through a bearing. The insides of the terminal housing 501 and the transfer housing 502 are both provided with water-blocking plates 606 for blocking the water-guiding channel 603, and the water-blocking plates 606 are fixedly connected to the side walls of the rotating shaft 605. The insides of the terminal housing 501 and the transfer housing 502 are provided with flexible sealing covers 607 for sealing the ferrule 604 to prevent the high-pressure fluid from flowing out from the gap of the ferrule 604;

[0041] In order to ensure the normal use of the flexible sealing cover 607, a protective cover can also be provided on the outside of the flexible sealing cover 607 to prevent direct impact of the high-pressure fluid on it. A drive frame 16 is provided on the outside of the terminal cover 501 and the transfer cover 502. One end of the drive frame 16 is fixedly connected to the corresponding side wall of the rotating shaft 605. Both sides of the bottom ends of the terminal rod 805 and the transfer rod 806 are fixedly connected with drive blocks three, and the drive block three is slidably connected in the corresponding drive frame 16.

[0042] In the specific setting, during the downward sliding of the terminal rod 805 and the transfer rod 806 in the corresponding sleeve 804, the driving block 3 connected at the bottom thereof cooperates with the driving frame 16, thereby driving the driving frame 16 to deflect, and the driving frame 16 drives the rotating shaft 605 to deflect, and the rotating shaft 605 drives the correspondingly connected watertight plate 606 to deflect synchronously during the deflection process;

[0043] The specific changes in the terminal housing 501 are as follows:

[0044] When the corresponding driving frame 16 drives the water baffle 606 in the terminal housing 501 to deflect synchronously through the rotating shaft 605, the water baffle 606 deflects from one side inside the terminal housing 501 to the position of the water guide channel 603, so as to block the water guide channel 603 and prevent the remaining high-pressure fluid from continuing to flow into the conduit 1 601 through the outlet pipe 1;

[0045] The specific changes in the transfer housing 502 are as follows:

[0046] When the corresponding driving frame 16 drives the water-blocking plate 606 in the transfer cover 502 to deflect synchronously through the rotating shaft 605, the water-blocking plate 606 deflects from the position of the water-conducting channel 603 in the transfer cover 502 to one side, exposing the water-conducting channel 603, that is, the front chamber 201, the water outlet pipe 402, the water-conducting channel 603 in the transfer cover 502 and the conduit 602 are in a connected state, so that the high-pressure fluid accumulated in the front chamber 201 flows to the designated position through the water outlet pipe 402, the water-conducting channel 603 in the transfer cover 502 and the conduit 602, and at the same time can quickly relieve the pressure in the front chamber 201.

[0047] In combination with the first embodiment, utilizing the characteristic that the internal pressure of the front chamber 201 continuously increases due to the continuous accumulation of high-pressure fluid in the front chamber 201, an extrusion plate 15 is provided, and the extrusion plate 15 is used to drive the adjustment component 8 to adaptively deflect the water-blocking plate 606 inside the terminal cover 501 and the transfer cover 502, so that the internal pressure is actively released, thereby solving the problem of a sudden increase in internal pressure of the valve body 1 due to a malfunction, and driving the valve body 1 to adaptively switch the flow pipeline, so that the high-pressure fluid inside the valve body 1 is adaptively circulated.

[0048] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An active check valve for high-pressure fluid, comprising a valve body (1), characterized in that: The interior of the valve body (1) is divided into a front chamber (201) and a rear chamber (202); the front chamber (201) and the rear chamber (202) are connected via a water-passing groove (203); a valve flap (3) matching the water-passing groove (203) is provided inside the rear chamber (202); the valve flap (3) is rotatably connected to the top of the inner wall of the rear chamber (202); The front end, rear end and side wall of the valve body (1) are respectively connected to a water inlet pipe (401), a water outlet pipe 1 and a water outlet pipe 2 (402); the ends of the water outlet pipe 1 and the water outlet pipe 2 (402) away from the valve body (1) are respectively connected to a terminal cover (501) and a transfer cover (502); the terminal cover (501) and the transfer cover (502) are both fixedly connected to the outer wall of the valve body (1) via corresponding support rods; the top and side walls of the valve body (1) are both provided with adjustment components (8).

2. An active check valve for high-pressure fluid according to claim 1, characterized in that: The top of the valve body (1) and the top of the side wall are respectively fixedly mounted with a bracket one (701) and a bracket two (702); the adjustment assembly (8) comprises a swing frame one (801) and a swing frame two (802); the middle portion of the swing frame one (801) is rotatably connected to the bracket one (701); the middle portion of the swing frame two (802) is rotatably connected to the bracket two (702); both ends of the swing frame one (801) and the swing frame two (802) are provided with driving grooves; The two side walls of the valve body (1) are fixedly connected to sleeves (804) by bolts, and the two sleeves (804) are slidably connected to terminal rods (805) and transfer rods (806) respectively. The top ends of the terminal rods (805) and the transfer rods (806) are fixedly connected to drive blocks (803) that match the corresponding drive grooves.

3. The active check valve for high-pressure fluid according to claim 2, characterized in that: The top of the valve body (1) is fixedly connected to a limiting cylinder (9), a limiting rod (10) is slidably connected inside the limiting cylinder (9), the top of the limiting rod (10) is fixedly connected to a right-angle push plate (11), the tops of both ends of the right-angle push plate (11) are fixedly connected to push rods (12), and both sides of the top of the push rod (12) are fixedly connected to drive blocks 2 (13) that match the corresponding drive grooves.

4. The active check valve for high-pressure fluid according to claim 3, characterized in that: An extrusion cover (14) is fixedly installed on the top of the inner wall of the front chamber (201), the extrusion cover (14) is connected to the limiting cylinder (9), the interior of the extrusion cover (14) is slidably connected to an extrusion plate (15), the outer side of the extrusion plate (15) is installed with a sealing ring, and the bottom end of the limiting rod (10) passes through the valve body (1) and is fixedly connected to the top of the extrusion plate (15); A compression spring is sleeved on the outer side of the portion of the limiting rod (10) located on the extrusion cover (14), and two ends of the compression spring are respectively fixedly connected to the extrusion cover (14) and the extrusion plate (15).

5. The active check valve for high-pressure fluid according to claim 4, characterized in that: The outer sides of the terminal cover (501) and the transfer cover (502) are respectively connected with a conduit 1 (601) and a conduit 2 (602); the side walls of the terminal cover (501) and the transfer cover (502) are both provided with a water guide channel (603); the tops of the terminal cover (501) and the transfer cover (502) are both provided with a movable groove, and a ferrule (604) is fixedly connected in the movable groove.

6. The active check valve for high-pressure fluid according to claim 5, characterized in that: The sleeve (604) is movably connected with a rotating shaft (605) via a bearing. The terminal cover (501) and the transfer cover (502) are both provided with a water-blocking plate (606) for blocking the water-conducting channel (603). The water-blocking plate (606) is fixedly connected to the side wall of the rotating shaft (605). The terminal cover (501) and the transfer cover (502) are both provided with a flexible sealing cover (607) for closing the sleeve (604).

7. An active check valve for high-pressure fluid according to claim 6, characterized in that: A driving frame (16) is arranged on the outer sides of the terminal cover (501) and the transfer cover (502), and one end of the driving frame (16) is fixedly connected to the side wall of a correspondingly arranged rotating shaft (605).

8. The active check valve for high-pressure fluid according to claim 7, characterized in that: Both sides of the bottom ends of the terminal rod (805) and the transfer rod (806) are fixedly connected with driving blocks three, and the driving blocks three are slidably connected in the corresponding driving frames (16).

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