High-pressure-resistant check valve based on oil exploitation

Abstract

The utility model relates to the technical field of high-pressure-resistant check valves, in particular to a high-pressure-resistant check valve based on oil exploitation, which comprises a valve casing, two ends of the valve casing are fixedly connected with flowing pipelines, one end of each flowing pipeline is fixedly connected with a connecting flange, the top end of the valve casing is fixedly connected with a valve cover through a bolt, and a blocking component is arranged on the inner side of the valve casing. Wherein the inner side of one flowing pipeline is fixedly connected with a supporting mechanism, the blocking assembly comprises a mounting seat, the mounting seat is fixedly arranged on one side of the bottom end of the valve cover, a hinge seat is hinged to the bottom end of the mounting seat, a valve is fixedly connected to the bottom end of the hinge seat, a blocking disc is fixedly connected to the rear end face of the valve, and sliding grooves are formed in the two sides of the middle of the blocking disc. According to the valve, the pressure applying mechanism drives the stop block to be automatically embedded into the stop groove of the supporting base, complete closing of the valve is achieved, and the problem that the valve is repeatedly flapped due to large pressure fluctuation is solved.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure check valve technology, specifically a high-pressure check valve based on oil extraction. Background Technology

[0002] High-pressure check valves used in oil extraction are specifically designed to prevent backflow of oil. They control the unidirectional flow of fluid through their own structure and oil pressure. When oil flows in the forward direction, the valve disc opens under the thrust of the oil. When the oil stops flowing or flows in the reverse direction, the valve disc closes under its own weight and oil pressure, thus preventing backflow. Large pressure fluctuations or pressures close to the pressure before and after the valve may cause the valve disc to repeatedly slap and become damaged, thereby affecting its closing performance. Lift check valves, swing check valves, and butterfly check valves are commonly used in oil extraction to provide reliable protection for oil extraction.

[0003] For swing check valves, during the oil transportation process, there is high-pressure oil convection. Due to the large pressure fluctuation, the valve disc is prone to repeated flapping and cannot be completely closed. Therefore, to address the above problem, a high-pressure resistant check valve based on oil extraction is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure check valve based on oil extraction, in order to solve the problem that during the oil transportation process, there is high-pressure oil convection, and due to the large pressure fluctuation, the valve disc is easily repeatedly flapped and cannot be completely closed.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-pressure check valve for oil extraction includes a valve body. Both ends of the valve body are fixedly connected to flow pipes, one end of which is fixedly connected to a connecting flange. A valve cover is bolted to the top of the valve body. A blocking assembly is provided inside the valve body, and a support mechanism is fixedly connected to the inner side of one of the flow pipes. The blocking assembly includes a mounting base, which is fixedly disposed on one side of the bottom end of the valve cover. A hinged seat is hinged to the bottom end of the mounting base, and a valve is fixedly connected to the bottom end of the hinged seat. A blocking disc is fixedly connected to the rear end face of the valve. The blocking disc has a central portion... Both sides of the plate are provided with sliding grooves, and a blocking block is slidably connected to the inner side of the sliding groove. An installation cylinder is fixedly connected to the middle of the rear end face of the blocking plate. A pressure applying mechanism is slidably connected to the middle of the installation cylinder. The pressure applying mechanism includes a first pressure applying rod, a return spring is sleeved in the middle of the first pressure applying rod, and a pressure applying seat is fixedly connected to the front end of the first pressure applying rod. Two corresponding second pressure applying rods are rotatably connected inside the pressure applying seat. A connecting seat is hinged to one end of the second pressure applying rod. The outer side of the connecting seat is fixedly connected to one end of the blocking block. An extension plate is fixedly connected to the rear end of the first pressure applying rod.

[0007] As a further optimization of this utility model, the support mechanism includes a valve pipe, one end of which is fixedly connected to a support plate, and both sides of the middle part of the support plate are fixedly connected to support seats, with blocking grooves opened on the corresponding sides of the two support seats.

[0008] As a further optimization of this utility model, the blocking disc has a movable groove in the middle, the movable groove has a circular cross-sectional shape, and the inner side of the mounting cylinder is connected to the inner side of the sliding groove through the inner side of the movable groove.

[0009] As a further optimization of this utility model, the reset spring is located inside the mounting cylinder, one end of the reset spring is fixedly connected to one end of the inner side of the mounting cylinder, and the other end of the reset spring is fixedly connected to the rear end face of the pressure seat.

[0010] As a further optimization of this utility model, the two blocking blocks are arranged symmetrically about the pressure seat, and the positions of the blocking blocks correspond to the positions of the blocking grooves.

[0011] As a further optimization of this utility model, the extension disc is disc-shaped and located on the central axis of the first pressure rod.

[0012] As a further optimization of this utility model, the first pressure rod has a square vertical cross-section and is located on the central axis of the pressure seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, the design of the extended disc increases the contact area with oil through the setting of the blocking component and the support mechanism, so that the pressure of the backflowing oil can more effectively drive the pressure applying mechanism to work, thereby driving the blocking block to automatically embed into the blocking groove of the support seat, realizing the complete closure of the valve, and avoiding the problem of repeated valve flapping caused by large pressure fluctuations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a cross-sectional structural diagram of the blocking disc of this utility model;

[0018] Figure 4 This is a schematic diagram of the vertical cross-sectional structure of the blocking disc of this utility model;

[0019] Figure 5 This is a schematic diagram of the support mechanism of this utility model.

[0020] In the diagram: 1. Valve body; 2. Flow pipe; 3. Connecting flange; 4. Valve cover; 5. Blocking assembly; 6. Support mechanism;

[0021] 51. Mounting base; 52. Hinge base; 53. Valve; 54. Blocking disc; 55. Slide groove; 56. Blocking block; 57. Mounting cylinder; 58. Pressure applying mechanism; 59. Extension disc;

[0022] 581. First pressure rod; 582. Return spring; 583. Pressure seat; 584. Second pressure rod; 585. Connecting seat; 586. Movable groove;

[0023] 61. Valve pipe; 62. Support plate; 63. Support base; 64. Blocking groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Please see Figure 1-5 This utility model provides a technical solution:

[0027] A high-pressure check valve for oil extraction includes a valve body 1. Flow pipes 2 are fixedly connected to both ends of the valve body 1. A connecting flange 3 is fixedly connected to one end of each flow pipe 2. A valve cover 4 is bolted to the top of the valve body 1. A blocking assembly 5 is provided inside the valve body 1. A support mechanism 6 is fixedly connected to the inner side of one of the flow pipes 2. The blocking assembly 5 includes a mounting base 51, which is fixedly disposed on one side of the bottom of the valve cover 4. A hinged seat 52 is hinged to the bottom of the mounting base 51. A valve 53 is fixedly connected to the bottom of the hinged seat 52. A blocking disc 54 is fixedly connected to the rear end face of the valve 53. Sliding grooves 55 are provided on both sides of the middle of the blocking disc 54. A blocking block 56 is slidably connected to the inner side of the sliding grooves 55. An installation cylinder is fixedly connected to the middle of the rear end face of the blocking disc 54. 57. A pressure applying mechanism 58 is slidably connected to the middle of the mounting cylinder 57. The pressure applying mechanism 58 includes a first pressure applying rod 581. The vertical cross-section of the first pressure applying rod 581 is square. The first pressure applying rod 581 is located on the central axis of the pressure applying seat 583. A return spring 582 is sleeved in the middle of the first pressure applying rod 581. The front end of the first pressure applying rod 581 is fixedly connected to the pressure applying seat 583. Two corresponding second pressure applying rods 584 are rotatably connected inside the pressure applying seat 583. One end of the second pressure applying rod 584 is hinged to a connecting seat 585. The outer side of the connecting seat 585 is fixedly connected to one end of the blocking block 56. The rear end of the first pressure applying rod 581 is fixedly connected to an extension disk 59. The extension disk 59 is disc-shaped and is located on the central axis of the first pressure applying rod 581.

[0028] As a further implementation of this solution, the support mechanism 6 includes a valve pipe 61, one end of which is fixedly connected to a support plate 62. Support seats 63 are fixedly connected to both sides of the middle part of the support plate 62. A blocking groove 64 is opened on one side of each of the two support seats 63. By using the blocking block 56 to automatically embed into the blocking groove 64, the valve 53 can be completely closed.

[0029] As a further implementation of this solution, a movable groove 586 is provided in the middle of the blocking plate 54. The movable groove 586 has a circular cross-sectional shape. The inner side of the mounting cylinder 57 is connected to the inner side of the sliding groove 55 through the inner side of the movable groove 586. This provides a movable space for the adjustment of the second pressure rod 584.

[0030] As a further implementation of this solution, the reset spring 582 is located inside the mounting cylinder 57. One end of the reset spring 582 is fixedly connected to one end of the inner side of the mounting cylinder 57, and the other end of the reset spring 582 is fixedly connected to the rear end face of the pressure seat 583. The reset spring 582 can pull the pressure seat 583 to reset by naturally contracting.

[0031] As a further implementation of this scheme, two blocking blocks 56 are symmetrically arranged on the left and right sides with the pressure seat 583 as the center. The position of the blocking blocks 56 corresponds to the position of the blocking groove 64. This arrangement of the two blocking blocks 56 allows for synchronous adjustment.

[0032] Working process: Connect the connecting flanges 3 at both ends of the valve body 1 to the oil pipeline with bolts and nuts. The flow pipe 2 located on one side of the support mechanism 6 is the inlet, and the side away from the support mechanism 6 is the outlet. When the inlet pressure is greater than the sum of the weight of valve 53 and its flow resistance, valve 53 is opened; conversely, when oil flows back, valve 53 is closed. This is existing technology. For high-pressure oil convection during oil transportation, valve 53 is rotatably positioned in front of valve pipe 61 via mounting base 51 and hinge base 52. Oil backflow causes valve 53 to automatically close, preventing oil from entering valve pipe 61. Simultaneously, the pressure of the backflowing oil acts on the first pressure rod 581 through the extension plate 59. The extension plate 59 raises the first pressure rod 581 relative to the oil... The contact area facilitates the forward movement of the first pressure rod 581, which in turn pushes the front pressure seat 583 forward. The second pressure rod 584 then presses the blocking blocks 56 on both sides outward, causing the blocking blocks 56 to automatically embed into the blocking groove 64 of the support seat 63, thus completely closing the valve 53. This prevents the valve 53 from repeatedly slapping due to large pressure fluctuations. In its natural state, the return spring 582 is in a contracted state. When the oil stops flowing back, it no longer applies pressure to the extension plate 59. The return spring 582 naturally contracts, pulling the pressure seat 583 back to its original position. Similarly, the second pressure rod 584 pulls the blocking blocks 56 on both sides back into the slide groove 55, disengaging them from the blocking groove 64 of the support seat 63, allowing the valve 53 to open.

[0033] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure check valve based on oil extraction, comprising a valve body (1), characterized in that: Both ends of the valve body (1) are fixedly connected to flow pipes (2), one end of the flow pipe (2) is fixedly connected to a connecting flange (3), the top of the valve body (1) is fixedly connected to a valve cover (4) by bolts, the valve body (1) is provided with a blocking assembly (5) on the inner side, and a support mechanism (6) is fixedly connected to the inner side of one of the flow pipes (2). The blocking assembly (5) includes a mounting base (51), which is fixedly disposed on one side of the bottom end of the valve cover (4). A hinge seat (52) is hinged to the bottom end of the mounting base (51), and a valve (53) is fixedly connected to the bottom end of the hinge seat (52). A blocking disc (54) is fixedly connected to the rear end face of the valve (53). A sliding groove (55) is provided on both sides of the middle part of the blocking disc (54). A blocking block (56) is slidably connected to the inner side of the sliding groove (55). An installation cylinder (57) is fixedly connected to the middle part of the rear end face of the blocking disc (54), and the middle part of the installation cylinder (57) is slidably connected to... There is a pressure applying mechanism (58), which includes a first pressure applying rod (581), a return spring (582) sleeved in the middle of the first pressure applying rod (581), a pressure applying seat (583) fixedly connected to the front end of the first pressure applying rod (581), two corresponding second pressure applying rods (584) rotatably connected inside the pressure applying seat (583), a connecting seat (585) hinged to one end of the second pressure applying rod (584), a connecting seat (585) fixedly connected to one end of the blocking block (56) on the outside, and an extension plate (59) fixedly connected to the rear end of the first pressure applying rod (581).

2. The high-pressure check valve based on oil extraction according to claim 1, characterized in that: The support mechanism (6) includes a valve pipe (61), one end of which is fixedly connected to a support plate (62), and both sides of the middle part of the support plate (62) are fixedly connected to support seats (63), and a blocking groove (64) is opened on the corresponding side of the two support seats (63).

3. The high-pressure check valve based on oil extraction according to claim 1, characterized in that: The blocking disc (54) has a movable groove (586) in the middle. The movable groove (586) has a circular cross-sectional shape. The inner side of the mounting cylinder (57) is connected to the inner side of the sliding groove (55) through the inner side of the movable groove (586).

4. The high-pressure check valve based on oil extraction according to claim 1, characterized in that: The reset spring (582) is located inside the mounting cylinder (57). One end of the reset spring (582) is fixedly connected to one end of the inner side of the mounting cylinder (57), and the other end of the reset spring (582) is fixedly connected to the rear end face of the pressure seat (583).

5. The high-pressure check valve based on oil extraction according to claim 1, characterized in that: The two blocking blocks (56) are symmetrically arranged on the left and right sides with the pressure seat (583) as the center, and the position of the blocking block (56) corresponds to the position of the blocking groove (64).

6. The high-pressure check valve based on oil extraction according to claim 1, characterized in that: The extension disc (59) is disc-shaped and is located on the central axis of the first pressure rod (581).

7. The high-pressure check valve based on oil extraction according to claim 1, characterized in that: The first pressure rod (581) has a square vertical cross-section and is located on the central axis of the pressure seat (583).

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