Shunting check valve

Abstract

The invention discloses a shunt check valve, and relates to the technical field of check valves. The check valve comprises a valve body, a water inlet pipe and a water outlet pipe are arranged at the two ends of the valve body respectively, a mounting shaft is rotationally connected to the inner wall of one side of the valve body, a fixing rod is fixedly connected to the circumference of the mounting shaft, and a valve clack is fixedly mounted at the other end of the fixing rod; one end of the mounting shaft rotationally penetrates through the valve body and is fixedly connected with a fixing shaft, the circumference of the fixing shaft is fixedly connected with a swing arm, the outer wall of one side of the valve body is fixedly connected with a connecting shaft, and one end of the connecting shaft is rotationally connected with a guide cylinder. By means of flowing of hydraulic oil, the final closing speed of the valve clack is reduced, the water hammer effect is prevented, the service life of the valve body is prolonged, meanwhile, upward impact force of the spring on the valve clack is buffered, the valve clack is prevented from impacting the valve body, the service life of the valve clack and the service life of the valve body are prolonged, the reset state of the valve clack can be observed through the pointer, and safety is improved. The situation that the valve clack is not closed in place is avoided, and workers are reminded to overhaul.

Description

Technical Field

[0001] The invention belongs to the technical field of check valves, and in particular relates to a diverter check valve. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part. It blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve, also known as a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement mode is divided into lifting type and swing type, which is suitable for various media such as liquid, air, steam, condensate, etc.

[0003] During the use of existing check valves, the valve disc is usually installed inside the valve body. During the opening and closing of the valve disc, the valve disc will swing due to the influence of the water flow and is also prone to collide with the valve body, thereby affecting the service life of the valve body. It is also difficult for staff to observe the status of the valve disc. Therefore, a diverter check valve is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a diverter check valve, which utilizes the flow of hydraulic oil to reduce the final closing speed of the valve disc, prevent the water hammer effect, and increase the service life of the valve body. At the same time, a spring is used to buffer the upward impact force of the valve disc to prevent the valve disc from impacting the valve body, thereby increasing the service life of the valve disc and the valve body. The reset state of the valve disc can also be observed by a pointer to prevent the valve disc from closing incompletely, reminding the staff to carry out maintenance, thereby solving the existing technical problems.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A diverter check valve comprises: a valve body, wherein a water inlet pipe and a water outlet pipe are respectively arranged at two ends of the valve body, a mounting shaft is rotatably connected to the inner wall of one side of the valve body, a fixing rod is fixedly connected to the circumference of the mounting shaft, and a valve disc is fixedly installed at the other end of the fixing rod;

[0007] One end of the mounting shaft rotates through the valve body and is fixedly connected with a fixed shaft, the circumference of the fixed shaft is fixedly connected with a swing arm, one side outer wall of the valve body is fixedly connected with a connecting shaft, one end of the connecting shaft is rotatably connected with a guide cylinder, the top of the guide cylinder is slidably connected with a first sliding rod that penetrates, the top of the first sliding rod is fixedly connected with a driving rod, the driving rod is rotatably connected with the swing arm, the bottom of the first sliding rod is fixedly connected with a movable block, the movable block is located in the guide cylinder, the guide cylinder is slidably connected with a second piston, the second piston is slidably connected in the guide cylinder, and the bottom of the guide cylinder is fixedly connected with a connecting rod. Tube, the other end of the connecting pipe is fixedly connected with a hydraulic oil cylinder, a first piston is slidably connected in the hydraulic oil cylinder, a counterweight is fixed on the top of the first piston, and a guide cylinder is installed on one side of the valve body, a first sliding rod and a movable block that can slide are installed in the guide cylinder, so that the movable block is driven downward by the installation shaft, and the movable block pushes the second piston, and the second piston squeezes the hydraulic oil into the hydraulic oil cylinder through the connecting pipe. The flow of hydraulic oil is used to reduce the speed at which the valve disc is finally closed, prevent water hammer effect, and increase the service life of the valve body. A first air hole is provided on the top of the hydraulic oil cylinder.

[0008] Furthermore, the top of the guide cylinder is slidably connected to two penetrating second sliding rods, and a spring is fixedly connected between the bottom of the second sliding rod and the top inner wall of the guide cylinder. A second air hole is opened on the top of the guide cylinder, and the second sliding rod and the spring are installed on the top of the guide cylinder, so that when the valve flap is opened to the tail end, the movable block contacts the second sliding rod, and then the spring is used to buffer the upward impact force of the valve flap, thereby preventing the valve flap from impacting the valve body, thereby increasing the service life of the valve flap and the valve body.

[0009] Furthermore, an arc-shaped positioning ring is fixedly connected to the circumferential outer wall of the valve body, and a pointer used in conjunction with the positioning ring is fixedly connected to one end of the swing arm for observing the resetting of the valve flap. Through the cooperation between the pointer and the positioning ring, the resetting state of the valve flap can be observed through the pointer after the valve flap is closed, thereby avoiding the valve flap from closing in place and reminding the staff to perform maintenance.

[0010] Furthermore, a slider is slidably connected to the top of the positioning ring, and one side of the slider is fixedly connected to a limit frame. The limit frame is located above the pointer and is used in conjunction with the pointer. Through the setting of the limit frame, the limit frame is moved above the pointer and then locked by a top screw, thereby maintaining the stability of the valve flap and avoiding the phenomenon of the valve flap moving back and forth due to similar pressures on both sides of the valve flap.

[0011] Furthermore, one side of the slider is threadedly connected with a penetrating top screw, and the top screw is in conflict with the valve body.

[0012] Furthermore, the top of the water inlet pipe is fixedly connected to a connecting pipe, and the top of the connecting pipe is fixedly connected to an air storage cylinder.

[0013] Furthermore, the top of the air storage cylinder is threadedly connected with a penetrating second sealing plug.

[0014] Furthermore, a top cover is fixed to the top of the valve body by bolts, and a first sealing bolt is threadedly connected to the top of the top cover.

[0015] Furthermore, flanges are welded to the ends of the water inlet pipe and the water outlet pipe away from the valve body.

[0016] The embodiments of the present invention have the following beneficial effects:

[0017] In the present invention, a guide cylinder is installed on one side of the valve body, and a slidable first slide rod and a movable block are installed in the guide cylinder, so that the movable block is driven downward by the installation shaft, and the movable block pushes the second piston. The second piston squeezes the hydraulic oil into the hydraulic oil cylinder through the connecting pipe, and the flow of the hydraulic oil is utilized to reduce the speed at which the valve disc is finally closed, thereby preventing the water hammer effect and improving the service life of the valve body.

[0018] In the present invention, by installing a second slide rod and a spring on the top of the guide cylinder, when the valve flap opens to the tail end, the movable block contacts the second slide rod, and then the spring is used to buffer the upward impact force of the valve flap, thereby preventing the valve flap from impacting the valve body and improving the service life of the valve flap and the valve body.

[0019] In the present invention, by using the pointer and the positioning ring in coordination, after the valve flap is closed, the reset state of the valve flap can be observed through the pointer, thereby preventing the valve flap from being closed in place and reminding the staff to perform maintenance.

[0020] In the present invention, the limit frame is provided, the limit frame is moved above the pointer, and then locked by the top screw, so as to maintain the stability of the valve flap and avoid the phenomenon of the valve flap moving back and forth due to similar pressure on both sides of the valve flap.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of the present invention;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of an embodiment of the present invention;

[0025] Figure 3 It is a schematic cross-sectional structural diagram of a guide tube according to an embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of a partial structure of an embodiment of the present invention;

[0027] Figure 5 The figure is a schematic cross-sectional view of an air storage cylinder according to an embodiment of the present invention.

[0028] In the figure: 1. valve body; 2. water inlet pipe; 3. water outlet pipe; 4. top cover; 5. first sealing bolt; 6. mounting shaft; 7. fixing rod; 8. valve disc; 9. guide cylinder; 10. first slide rod; 11. movable block; 12. connecting pipe; 13. hydraulic oil cylinder; 14. first piston; 15. counterweight; 16. first air hole; 17. connecting shaft; 18. second slide rod; 19. spring; 20. swing arm; 21. driving rod; 22. positioning ring; 23. pointer; 24. slider; 25. limit frame; 26. top screw; 27. connecting pipe; 28. air storage cylinder; 29. ​​second sealing bolt; 30. second piston; 31. fixing shaft. 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] In the description of the present invention, it should be understood that the terms "opening", "upper", "middle", "length", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0032] Embodiment 1

[0033] See also Figure 1-Figure 5As shown, in this embodiment, a diverter check valve is provided, comprising: a valve body 1, a water inlet pipe 2 and a water outlet pipe 3 are respectively arranged at both ends of the valve body 1, a mounting shaft 6 is rotatably connected to the inner wall of one side of the valve body 1, a fixing rod 7 is fixedly connected to the circumference of the mounting shaft 6, and a valve flap 8 is fixedly installed at the other end of the fixing rod 7, and the valve flap 8 is used to control the flow of the medium, prevent the medium from flowing back, and protect the system and equipment from damage;

[0034] One end of the mounting shaft 6 rotates through the valve body 1 and is fixedly connected with a fixed shaft 31, the circumference of the fixed shaft 31 is fixedly connected with a swing arm 20, one side outer wall of the valve body 1 is fixedly connected with a connecting shaft 17, one end of the connecting shaft 17 is rotatably connected with a guide cylinder 9, the top of the guide cylinder 9 is slidably connected with a penetrating first slide rod 10, the top of the first slide rod 10 is fixedly connected with a driving rod 21, the driving rod 21 is rotatably connected with the swing arm 20, the bottom of the first slide rod 10 is fixedly connected with a movable block 11, the movable block 11 is located in the guide cylinder 9, the guide cylinder 9 is slidably connected with a second piston 30, the second piston 30 is slidably connected in the guide cylinder 9, the bottom of the guide cylinder 9 is fixedly connected with a connecting pipe 12, and the other end of the connecting pipe 12 is fixedly connected with hydraulic oil Cylinder 13, a first piston 14 is slidably connected in the hydraulic oil cylinder 13. When the water supply to the pipeline is cut off, the valve disc 8 falls down, and the water at the water outlet flows back, causing the valve disc 8 to fall down. Similarly, the mounting shaft 6 is used to drive the movable block 11 to move downward, and the movable block 11 pushes the second piston 30. The second piston 30 squeezes the hydraulic oil into the hydraulic oil cylinder 13 through the connecting pipe 12. The flow of hydraulic oil is used to reduce the speed at which the valve disc 8 is finally closed to prevent the water hammer effect. At the same time, the valve disc 8 and the valve body 1 are further protected. A counterweight 15 is fixed on the top of the first piston 14. The counterweight 15 is used to reset the first piston 14 to facilitate the resetting of the hydraulic oil. A first air hole 16 is provided on the top of the hydraulic oil cylinder 13. The first air hole 16 is used for gas circulation in the hydraulic oil cylinder 13.

[0035] Embodiment 2

[0036] Improved on the basis of embodiment 1: Refer to attached Figure 1-Figure 5 ,

[0037] In the present invention, the top of the guide cylinder 9 is slidably connected with two penetrating second sliding rods 18, and a spring 19 is fixedly connected between the bottom of the second sliding rod 18 and the top inner wall of the guide cylinder 9. A second air hole is opened at the top of the guide cylinder 9. When the valve flap 8 opens to the rear end, the movable block 11 contacts the second sliding rod 18, and then the spring 19 is used to buffer the upward impact force of the valve flap 8.

[0038] In particular, an arc-shaped positioning ring 22 is fixedly connected to the circumferential outer wall of the valve body 1, and a pointer 23 used in conjunction with the positioning ring 22 is fixedly connected to one end of the swing arm 20 for observing the resetting of the valve flap 8. The resetting state of the valve flap 8 can be observed through the pointer 23 to avoid the valve flap 8 from not closing properly, which is convenient for staff to check.

[0039] It should be noted that a slider 24 is slidably connected to the top of the positioning ring 22, and one side of the slider 24 is fixedly connected to a limit frame 25. The limit frame 25 is located above the pointer 23 and is used in conjunction with the pointer 23. One side of the slider 24 is threadedly connected with a penetrating top screw 26, and the top screw 26 contacts the valve body 1. The limit frame 25 is moved to above the pointer 23 and then locked by the top screw 26, thereby maintaining the stability of the valve flap 8 and avoiding the valve flap 8 from moving back and forth due to similar pressures on both sides of the valve flap 8.

[0040] In the present invention, the top of the water inlet pipe 2 is fixedly connected with a connecting pipe 27, and the top of the connecting pipe 27 is fixedly connected with an air storage cylinder 28, which is used to collect the air in the pipeline to reduce cavitation.

[0041] In particular, the top of the air storage cylinder 28 is threadedly connected with a penetrating second sealing plug 29, and the second sealing plug 29 can be opened to exhaust gas.

[0042] It should be noted that a top cover 4 is fixed to the top of the valve body 1 by bolts, and a first sealing plug 5 is threadedly connected to the top of the top cover 4, and exhaust can also be performed by opening the first sealing plug 5.

[0043] In the present invention, flanges are welded to the ends of the water inlet pipe 2 and the water outlet pipe 3 away from the valve body 1, and the flanges are convenient for connection with pipelines.

[0044] The use process and working principle of the technical solution of the present invention are as follows:

[0045] When in use, the valve body 1 is connected to the pipeline through the flange, and the water flow pushes the valve disc 8 open through its own pressure, thereby allowing the water to pass through. After the water flow stops, the valve disc 8 falls, thereby closing the valve body 1 to prevent water from flowing back. When the valve disc 8 is opened, it drives the installation shaft 6 and the fixed shaft 31 to rotate, and the fixed shaft 31 drives the swing arm 20 to rotate. The swing arm 20 pulls the first slide bar 10 through the driving rod 21, and the first slide bar 10 drives the movable block 11 to move. When the valve disc 8 is opened to the tail end, the movable block 11 contacts the second slide bar 18, and then the spring 19 is used to buffer the upward impact force of the valve disc 8 to prevent the valve disc 8 from impacting the valve body 1, thereby increasing the service life of the valve disc 8 and the valve body 1. When the water supply to the pipeline is stopped, the valve disc 8 The valve flap 8 falls down, and the water at the water outlet end flows back, causing the valve flap 8 to fall down. Similarly, the mounting shaft 6 is used to drive the movable block 11 to move downward, and the movable block 11 pushes the second piston 30. The second piston 30 squeezes the hydraulic oil into the hydraulic oil cylinder 13 through the connecting pipe 12. The flow of the hydraulic oil is used to reduce the speed at which the valve flap 8 is finally closed to prevent the water hammer effect. At the same time, the valve flap 8 and the valve body 1 are further protected. After the valve flap 8 is closed, the reset state of the valve flap 8 can be observed through the pointer 23 to prevent the valve flap 8 from not closing in place. The limit frame 25 is moved to the top of the pointer 23, and then locked by the top screw 26, so as to maintain the stability of the valve flap 8 and avoid the phenomenon of the valve flap 8 moving back and forth due to the similar pressure on both sides of the valve flap 8.

[0046] It should be noted that, in the description of this specification, descriptions such as "first", "second", etc. are merely used to distinguish between various features and have no actual order or directional meaning, and this application is not limited to this.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. 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. A diverter check valve, characterized in that: include: A valve body (1), wherein two ends of the valve body (1) are respectively provided with a water inlet pipe (2) and a water outlet pipe (3); an inner wall of one side of the valve body (1) is rotatably connected to a mounting shaft (6); a fixing rod (7) is fixedly connected to the circumference of the mounting shaft (6); and a valve flap (8) is fixedly installed at the other end of the fixing rod (7); One end of the mounting shaft (6) is rotatably connected to the valve body (1) and is fixedly connected to a fixed shaft (31); the circumference of the fixed shaft (31) is fixedly connected to a swing arm (20); a connecting shaft (17) is fixedly connected to an outer wall of one side of the valve body (1); one end of the connecting shaft (17) is rotatably connected to a guide cylinder (9); a first sliding rod (10) is slidably connected to the top of the guide cylinder (9); a driving rod (21) is fixedly connected to the top of the first sliding rod (10); the driving rod (21) is rotatably connected to the swing arm (20); the bottom of the first sliding rod (10) is fixedly connected to A movable block (11) is located in a guide cylinder (9), a second piston (30) is slidably connected in the guide cylinder (9), the second piston (30) is slidably connected in the guide cylinder (9), a connecting pipe (12) is fixedly connected at the bottom of the guide cylinder (9), the other end of the connecting pipe (12) is fixedly connected to a hydraulic oil cylinder (13), a first piston (14) is slidably connected in the hydraulic oil cylinder (13), a counterweight (15) is fixed at the top of the first piston (14), and a first air hole (16) is provided at the top of the hydraulic oil cylinder (13).

2. A diverter check valve as claimed in claim 1, characterized in that: The top of the guide cylinder (9) is slidably connected to two penetrating second sliding rods (18), and a spring (19) is fixedly connected between the bottom of the second sliding rod (18) and the top inner wall of the guide cylinder (9), and a second air hole is opened at the top of the guide cylinder (9).

3. A diverter check valve as claimed in claim 1, characterized in that: An arc-shaped positioning ring (22) is fixedly connected to the circumferential outer wall of the valve body (1), and a pointer (23) used in conjunction with the positioning ring (22) is fixedly connected to one end of the swing arm (20) for observing the resetting of the valve flap (8).

4. A diverter check valve as claimed in claim 3, characterized in that: The top of the positioning ring (22) is slidably connected to a slider (24), one side of the slider (24) is fixedly connected to a limiting frame (25), and the limiting frame (25) is located above the pointer (23) and is used in conjunction with the pointer (23).

5. A flow diverter check valve as claimed in claim 4, characterized in that: One side of the slider (24) is threadedly connected with a through-threaded top screw (26), and the top screw (26) is in contact with the valve body (1).

6. A flow diverter check valve as claimed in claim 5, characterized in that: The top of the water inlet pipe (2) is fixedly connected to a connecting pipe (27), and the top of the connecting pipe (27) is fixedly connected to an air storage cylinder (28).

7. A flow diverter check valve as claimed in claim 1, characterized in that: The top of the air storage cylinder (28) is threadedly connected with a second sealing plug (29) that penetrates through it.

8. A flow diverter check valve as claimed in claim 1, characterized in that: A top cover (4) is fixed to the top of the valve body (1) by means of bolts, and a first sealing plug (5) is threadedly connected to the top of the top cover (4) and penetrates through it.

9. A flow diverter check valve as claimed in claim 1, characterized in that: The water inlet pipe (2) and the water outlet pipe (3) are both welded with flanges at their ends away from the valve body (1).

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