Large-channel fracturing check valve

Abstract

The utility model discloses a large-channel fracturing check valve, which belongs to the technical field of drilling and production fracturing check valves and comprises a valve body, a mounting plate is connected above the valve body, connecting pipes are connected on two sides of the valve body, a valve seat is connected in the connecting pipe on one side of the valve body, a V-shaped flaring is arranged on the connecting pipe on the other side of the valve body, and the V-shaped flaring is connected with the valve seat. And a sealing cover is mounted on the mounting plate. According to the large-channel fracturing check valve, the sealing cover is inserted into the mounting plate, in the inserting process, the mounting plate pushes the fixing block into the hollow plate through the triangular inclined face of the fixing block to compress the spring, and therefore the fixing block is clamped into the fixing groove through springback of the spring, and positioning and mounting of the sealing cover are completed; and then the threaded rod is rotated through the rotating wheel, the threaded rod pushes the connecting plate to move, the inserting rod is promoted to be inserted into the inserting hole, and therefore the sealing cover is fixed, operation is easy, workers do not need to screw multiple sets of bolts, and the disassembly and maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling and production fracturing check valves, in particular to a large-channel fracturing check valve. Background Art

[0002] A check valve is a valve with a circular disc as its opening and closing part. It relies on its own weight and medium pressure to produce a movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. Check valves are indispensable valves in the process of drilling and fracturing.

[0003] Since the check valve is subjected to the erosion of high-pressure fluid and filling sand during use, the valve body will wear and age after long-term use. Currently, when assembling the check valve, the staff have to tighten multiple sets of bolt assemblies, which means that the staff also have to loosen multiple sets of bolts when disassembling. The operation is cumbersome and inconvenient for maintenance and replacement. Utility Model Content

[0004] In order to overcome the above-mentioned defects, the utility model provides a large-channel fracturing check valve, which solves the problem that workers have to screw multiple sets of bolts when disassembling, which is cumbersome to operate and inconvenient for maintenance and replacement.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a large-channel fracturing check valve, comprising a valve body, a mounting plate connected to the top of the valve body, connecting pipes connected to both sides of the valve body, a valve seat connected to the connecting pipe on one side of the valve body, a V-shaped expansion joint provided on the connecting pipe on the other side of the valve body, a sealing cover installed on the mounting plate, hollow plates connected to both sides of the sealing cover, a plurality of jacks provided on the sealing cover, and a sealing block connected to the bottom of the sealing cover.

[0006] A valve plate seat is connected below the sealing block, a fixing pin is connected to the valve plate seat, a valve disc is rotatably connected to the fixing pin, a positioning groove is provided on the mounting plate, a sliding groove is provided on the mounting plate, threaded rods are threadedly connected on both sides of the mounting plate, one end of the threaded rod is connected to a runner, the other end of the threaded rod is rotatably connected to a connecting plate, and a plurality of plug rods are connected to the connecting plate.

[0007] As a further solution of the present invention: a sealing steel ring is connected to the inner wall of the mounting plate, a slot is provided below the sealing block, and the sealing steel ring is L-shaped as a whole and is inserted into the slot.

[0008] As a further solution of the present invention: the valve seat and the valve disc are both spherical in design, a torsion spring is sleeved on the fixing pin, one end of the torsion spring is connected to the valve plate seat, and the other end of the torsion spring is connected to the valve disc.

[0009] As a further solution of the present invention: the connecting plate slides in the slide groove and contacts the slide groove wall, the insertion rod is inserted into the socket, a spring is connected to the inside of the hollow plate, and one end of the spring is connected to a fixed block.

[0010] As a further solution of the present invention: the hollow plate is inserted into the positioning groove, a fixing groove is opened on one side wall of the positioning groove, and the fixing block is triangular in design and is embedded in the fixing groove.

[0011] As a further solution of the present invention: a sealing ring is connected to the valve disc, and one end of the connecting pipe is connected to a connecting flange.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The large-channel fracturing check valve is provided with a hollow plate, a spring, a fixed block, a fixed groove, a rotary wheel, a threaded rod, a connecting plate, an insertion rod and a socket. The cover is inserted into the mounting plate. During the insertion process, the mounting plate will pass through the triangular inclined surface of the fixed block to push the fixed block into the hollow plate to compress the spring, so that the fixed block is stuck into the fixed groove through the rebound of the spring, completing the positioning and installation of the cover. After that, the threaded rod is rotated by the rotary wheel to make the threaded rod push the connecting plate to move, prompting the insertion rod to be inserted into the socket, thereby fixing the cover. The operation is simple and does not require the staff to tighten multiple sets of bolts, thereby improving the disassembly and maintenance efficiency.

[0013] 2. The large-channel fracturing check valve is equipped with a sealing block, a slot, a sealing steel ring, a valve seat, a torsion spring and a valve disc. When the cover enters the interior of the mounting plate, the sealing steel ring will be inserted into the slot, thereby sealing the gap through the sealing steel ring and the sealing block to prevent fluid leakage. When high-pressure fluid passes through the valve seat, it will push the valve disc, causing the valve disc to rotate around the fixed pin and simultaneously twist the torsion spring to open the channel. When the fluid stops flowing, the valve disc automatically seals on the valve seat by its own weight and the rotation of the torsion spring, and forms a line seal with the inner circular surface of the valve disc and the spherical surface of the valve seat to prevent fluid backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve body of the present invention.

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the hollow plate of the utility model.

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention.

[0018] In the figure: 1. Valve body; 2. Mounting plate; 3. Connecting pipe; 4. Valve seat; 5. V-shaped flare; 6. Closing cover; 7. Hollow plate; 8. Insert hole; 9. Sealing block; 10. Valve plate seat; 11. Fixing pin; 12. Valve disc; 13. Positioning groove; 14. Slide groove; 15. Threaded rod; 16. Rotor; 17. Connecting plate; 18. Insert rod; 19. Sealing steel ring; 20. Slot; 21. Torsion spring; 22. Sealing ring; 23. Spring; 24. Fixing block; 25. Fixing groove; 26. Connecting flange. DETAILED DESCRIPTION

[0019] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0020] like Figure 1-4 As shown, the utility model provides a technical solution: a large-channel fracturing check valve, comprising a valve body 1, a mounting plate 2 connected to the top of the valve body 1, connecting pipes 3 connected on both sides of the valve body 1, a valve seat 4 connected to the connecting pipe 3 on one side of the valve body 1, and a V-shaped expansion port 5 provided on the connecting pipe 3 on the other side of the valve body 1, a sealing cover 6 is installed on the mounting plate 2, hollow plates 7 are connected to both sides of the sealing cover 6, a plurality of insertion holes 8 are provided on the sealing cover 6, a sealing block 9 is connected below the sealing cover 6, a sealing steel ring 19 is connected to the inner wall of the mounting plate 2, a slot 20 is provided below the sealing block 9, the sealing steel ring 19 is L-shaped as a whole and is inserted into the slot 20, and the sealing effect is further improved by inserting the L-shaped sealing steel ring 19 into the slot 20 and utilizing the fit between the sealing block 9 and the inner wall of the mounting plate 2, thereby avoiding fluid leakage.

[0021] A valve plate seat 10 is connected to the bottom of the sealing block 9, a fixing pin 11 is connected to the valve plate seat 10, a valve disc 12 is rotatably connected to the fixing pin 11, a sealing ring 22 is connected to the valve disc 12, and one end of the connecting pipe 3 is connected to a connecting flange 26. When the valve disc 12 rotates and contacts the valve seat 4 due to its own gravity and the torsion spring 21, the sealing ring 22 will fit with the spherical surface of the valve seat 4, thereby improving the sealing effect and preventing fluid backflow.

[0022] The valve seat 4 and the valve disc 12 are both spherical in design. A torsion spring 21 is sleeved on the fixing pin 11. One end of the torsion spring 21 is connected to the valve plate seat 10, and the other end of the torsion spring 21 is connected to the valve disc 12. When the valve disc 12 is pushed to rotate by the high-pressure fluid, the torsion spring 21 will be twisted. After the fluid stops flowing, the rotation of the torsion spring 21 will assist the valve disc 12 to rotate, thereby sealing the valve seat 4.

[0023] A positioning groove 13 is provided on the mounting plate 2, and the hollow plate 7 is inserted into the positioning groove 13. A fixing groove 25 is provided on the groove wall on one side of the positioning groove 13. The fixing block 24 is triangular in design and is engaged with the fixing groove 25. The triangular inclined surface of the fixing block 24 allows the mounting plate 2 to flexibly push the fixing block 24 to move, thereby facilitating the installation and removal of the cover 6 by the staff. The engagement of the fixing block 24 with the fixing groove 25 can prevent the cover 6 from moving when the threaded rod 15 is twisted, thereby improving the stability of the cover 6 insertion.

[0024] A slide groove 14 is provided on the mounting plate 2, and threaded rods 15 are threadedly connected on both sides of the mounting plate 2. One end of the threaded rod 15 is connected to a runner 16, and the other end of the threaded rod 15 is rotatably connected to a connecting plate 17. A plurality of plug rods 18 are connected to the connecting plate 17, and the connecting plate 17 slides in the slide groove 14 and contacts the groove wall of the slide groove 14. The plug rod 18 is inserted into the socket 8, and a spring 23 is connected to the inside of the hollow plate 7, and one end of the spring 23 is connected to a fixing block 24. By rotating the threaded rod 15, multiple plug rods 18 are inserted into the socket 8 at the same time, and the staff does not need to use tools to tighten multiple sets of bolts, which makes it convenient for the staff to maintain the check valve. The slide groove 14 can limit the connecting plate 17 to prevent the connecting plate 17 from rotating with the threaded rod 15.

[0025] The working principle of the present invention is as follows: during assembly, the sealing cover 6 is inserted into the mounting plate 2, so that the sealing steel ring 19 can be inserted into the slot 20, thereby cooperating with the sealing block 9 to seal the gap. During the insertion process, the mounting plate 2 pushes the fixing block 24 into the hollow plate 7 to compress the spring 23, so that the fixing block 24 is clamped into the fixing groove 25 through the rebound of the spring 23, thereby improving the stability of the insertion of the sealing cover 6. Then, the threaded rod 15 is rotated by the rotating wheel 16, so that the threaded rod 15 pushes the connecting plate 17 to move, prompting the insertion rod 18 to be inserted into the insertion hole 8, thereby fixing the sealing cover 6. When the high-pressure fluid passes through the valve seat 4, it pushes the valve disc 12, causing the valve disc 12 to rotate around the fixing pin 11, and at the same time twisting the torsion spring 21, thereby opening the channel. When the fluid stops flowing, the valve disc 12 will automatically seal on the valve seat 4 by relying on its own weight and the rotation of the torsion spring 21, thereby preventing the fluid from flowing back.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A large channel fracturing check valve, comprising a valve body (1), characterized in that: The valve body (1) is connected to a mounting plate (2) above, and connecting pipes (3) are connected to both sides of the valve body (1). A valve seat (4) is connected to the connecting pipe (3) on one side of the valve body (1), and a V-shaped expansion opening (5) is provided on the connecting pipe (3) on the other side of the valve body (1). A sealing cover (6) is installed on the mounting plate (2), and hollow plates (7) are connected to both sides of the sealing cover (6). A plurality of jacks (8) are provided on the sealing cover (6), and a sealing block (9) is connected to the bottom of the sealing cover (6); A valve plate seat (10) is connected below the sealing block (9), a fixing pin (11) is connected to the valve plate seat (10), a valve flap (12) is rotatably connected to the fixing pin (11), a positioning groove (13) is provided on the mounting plate (2), a sliding groove (14) is provided on the mounting plate (2), threaded rods (15) are threadedly connected to both sides of the mounting plate (2), one end of the threaded rod (15) is connected to a rotating wheel (16), the other end of the threaded rod (15) is rotatably connected to a connecting plate (17), and a plurality of plug rods (18) are connected to the connecting plate (17).

2. The large channel fracturing check valve according to claim 1, characterized in that: A sealing steel ring (19) is connected to the inner wall of the mounting plate (2), a slot (20) is provided below the sealing block (9), and the sealing steel ring (19) is L-shaped as a whole and is inserted into the slot (20).

3. The large channel fracturing check valve according to claim 1, characterized in that: The valve seat (4) and the valve disc (12) are both spherical in design. A torsion spring (21) is sleeved on the fixing pin (11). One end of the torsion spring (21) is connected to the valve plate seat (10), and the other end of the torsion spring (21) is connected to the valve disc (12).

4. The large channel fracturing check valve according to claim 1, characterized in that: The connecting plate (17) slides in the slide groove (14) and contacts the wall of the slide groove (14). The insertion rod (18) is inserted into the insertion hole (8). A spring (23) is connected inside the hollow plate (7), and one end of the spring (23) is connected to a fixing block (24).

5. The large channel fracturing check valve according to claim 4, characterized in that: The hollow plate (7) is inserted into the positioning groove (13), a fixing groove (25) is provided on one side wall of the positioning groove (13), and the fixing block (24) is triangular in design and is engaged with the fixing groove (25).

6. The large channel fracturing check valve according to claim 1, characterized in that: A sealing ring (22) is connected to the valve flap (12), and one end of the connecting pipe (3) is connected to a connecting flange (26).

Images