Valve core of well drilling float valve

Abstract

The utility model relates to the technical field of well drilling articles, and discloses a well drilling float valve element which comprises a valve pipe, two symmetrical circulation openings are formed in the outer surface of the valve pipe, a fixing pipe is fixedly connected to the interior of the top end of the valve pipe, two symmetrical fixing blocks are fixedly connected to the bottom of the fixing pipe, and the two symmetrical circulation openings are formed in the valve pipe. A rotating shaft is rotationally connected between the two fixing blocks, a valve plate is fixedly connected to one side of the rotating shaft, through elastic cooperation of a torsional spring and a compression spring, the backflow hidden danger caused by spring fatigue when a single spring is arranged is avoided, and through sliding of an inserting column in an arc-shaped opening, the valve plate is controlled to be unfolded to the maximum position, so that the valve plate is unfolded to the maximum position, and the service life of the valve plate is prolonged. Therefore, even if the torsion spring and the compression spring are in spring fatigue, the valve plate can still be sealed under the impact of backflow, so that the backflow is avoided in time.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling supplies, in particular to a drilling float valve core. Background Art

[0002] The drilling float valve core is a key component used in drilling operations. Its primary function is to control the flow of fluid within the well, prevent backflow, and protect drilling equipment. It is widely used in oil and gas drilling projects to ensure operational safety and the normal operation of equipment.

[0003] When the drilling float valve core is used, the spring is one of the core components. After the drilling float valve core is used for a long time, the spring is prone to fatigue, resulting in insufficient rebound force and insufficient sealing, which causes the risk of liquid backflow and creates a safety hazard of blowout.

[0004] Therefore, it is necessary to design a drilling float valve core to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a drilling float valve core, which is used to solve the technical problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drilling float valve core, comprising a valve tube, the outer surface of the valve tube is provided with two symmetrical flow ports, and a fixed tube is fixedly connected to the top of the valve tube, and two symmetrical fixed blocks are fixedly connected to the bottom of the fixed tube, and a rotating shaft is rotatably connected between the two fixed blocks, and a valve plate is fixedly connected to one side of the rotating shaft, and a torsion spring is fixedly sleeved on the outer surface of the rotating shaft, and grooves are provided on the outer surface of the fixed tube and the bottom of the valve plate, and the two ends of the torsion spring are elastically clamped in the inside of the two grooves respectively. The bottom of the valve plate is fixed with a first connecting block, and the bottom end of the valve tube is provided with a circular opening, and a fixing plate is fixed to the inside of the circular opening, and a plug-in column is slidably inserted into the inside of the fixing plate, and a sealing plate is fixed to the bottom of the plug-in column, and a pressing plate is fixedly sleeved on the outer surface of the top end of the plug-in column, and an arc-shaped opening is provided on the outer surface of the first connecting block, and two symmetrical second connecting blocks are fixed to the top of the pressing plate, and a plug-in column is fixed between the two second connecting blocks, and the plug-in column is slidably inserted into the inside of the arc-shaped opening, and a compression spring is fixed between the pressing plate and the fixing plate.

[0007] Preferably, the valve plate is rotatably arranged at the bottom of the fixed tube, and a force-bearing plate is fixedly connected to the top of the valve plate. The force-bearing plate is rotatably arranged inside the fixed tube, and an outer surface of the force-bearing plate is provided with an arc surface.

[0008] Preferably, the sealing piece is slidably arranged inside the circular opening, and the outer surface of the sealing piece is in contact with the inner wall of the circular opening.

[0009] Preferably, the two arc-shaped openings are respectively located on both sides of the first connecting block, and adjacent sides of the two arc-shaped openings are respectively fitted with both sides of the first connecting block, and the bottom of the first connecting block is provided with an arc surface.

[0010] Preferably, the fixed tube is located directly above the two circulation ports, the bottom of the fixed tube is higher than the top of the circulation ports, and the diameter of the valve plate is greater than the inner diameter of the fixed tube.

[0011] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0012] The utility model avoids the backflow hidden danger caused by spring fatigue when a single spring is set through the elastic cooperation of the torsion spring and the compression spring, and controls the maximum expansion position of the valve plate by sliding the plug-in column inside the arc-shaped opening. As a result, even when the torsion spring and the compression spring are fatigued, the impact of backflow can still make the valve plate airtight, thereby avoiding the occurrence of backflow in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the valve tube structure of the present utility model;

[0015] Figure 3 This is an exploded schematic diagram of the fixed pipe structure of the present utility model;

[0016] In the figure: 1. Valve tube; 2. Valve plate; 3. Fixed block; 4. Rotating shaft; 5. Torsion spring; 6. First connecting block; 7. Pressing plate; 8. Inserting column; 9. Compression spring; 10. Circular opening; 11. Groove; 12. Second connecting block; 13. Arc-shaped opening; 14. Inserting column; 17. Force-bearing plate; 18. Fixed tube; 19. Flow port; 20. Fixed plate; 21. Sealing plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] Obviously, many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] See also Figure 1-3 The utility model provides a drilling float valve core, including a valve tube 1, the outer surface of the valve tube 1 is provided with two symmetrical flow ports 19, and the top of the valve tube 1 is fixedly connected to a fixed tube 18, and the bottom of the fixed tube 18 is fixedly connected to two symmetrical fixed blocks 3, and a rotating shaft 4 is rotatably connected between the two fixed blocks 3, and a valve plate 2 is fixedly connected to one side of the rotating shaft 4, and a torsion spring 5 is fixedly sleeved on the outer surface of the rotating shaft 4, and a groove 11 is provided on the outer surface of the fixed tube 18 and the bottom of the valve plate 2, and The two ends of the torsion spring 5 are elastically connected to the inside of the two grooves 11, and the bottom of the valve plate 2 is fixed with a first connecting block 6, and the bottom end of the valve tube 1 is provided with a circular opening 10, and the inside of the circular opening 10 is fixed with a fixing plate 20, and the inside of the fixing plate 20 is slidably inserted with a plug 8, and the bottom of the plug 8 is fixed with a sealing plate 21, and the top outer surface of the plug 8 is fixedly sleeved with a pressing piece 7, and the outer surface of the first connecting block 6 is provided with an arc opening 13, and the top of the pressing piece 7 is fixed with two symmetrical second connecting pieces. The connecting block 12 is fixedly connected with a plug-in column 14 between the two second connecting blocks 12, and the plug-in column 14 is slidably plugged into the interior of the arc-shaped opening 13, and a compression spring 9 is fixedly connected between the pressing plate 7 and the fixing plate 20. The fluid flow of the valve pipe 1 is controlled by rotating the valve plate 2 at the bottom of the fixed pipe 18. When the valve plate 2 is expanded, the valve plate 2 will drive the first connecting block 6 to squeeze the plug-in column 8 to slide toward the bottom end of the valve pipe 1, thereby using the pressing plate 7 to squeeze the compression spring 9 to generate elasticity. At the same time, the rotation of the valve plate 2 will also make The torsion spring 5 generates elastic force. By setting the torsion spring 5 and the compression spring 9, spring fatigue that is easy to occur in a single setting is avoided. At the same time, when the first connecting block 6 rotates, the sliding of the plug-in column 14 inside the arc-shaped opening 13 will limit the expansion position of the valve plate 2. Not only does the compression spring 9 avoid the possibility of spring fatigue, but the valve plate 2 is not easy to expand too much. Even if the spring is fatigued, the valve plate 2 can be easily closed by the backflow pressure, thereby improving the overall fluid flow of the valve pipe 1.

[0020] In order to facilitate the use of fluid to impact the force-bearing plate 17, thereby opening the valve plate 2, the valve plate 2 is rotatably set at the bottom of the fixed tube 18, and the top of the valve plate 2 is fixedly connected with the force-bearing plate 17. The force-bearing plate 17 is rotatably set inside the fixed tube 18, and the outer surface of the force-bearing plate 17 is provided with an arc surface.

[0021] In order to improve the sliding stability of the initial insertion column 8 , the sealing piece 21 is slidably disposed inside the circular opening 10 , and the outer surface of the sealing piece 21 is in contact with the inner wall of the circular opening 10 .

[0022] Furthermore, in order to ensure the sliding stability of the plug post 8 when the first connecting block 6 rotates, the two arc-shaped openings 13 are respectively located on both sides of the first connecting block 6, and the adjacent sides of the two arc-shaped openings 13 are respectively fitted with the two sides of the first connecting block 6, and an arc-shaped surface is opened at the bottom of the first connecting block 6.

[0023] Furthermore, in order to facilitate the expansion of the valve plate 2, the fixed tube 18 is located directly above the two flow ports 19, and the bottom of the fixed tube 18 is higher than the top of the flow ports 19, and the diameter of the valve plate 2 is greater than the inner diameter of the fixed tube 18.

[0024] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0025] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0026] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A drilling float valve core, comprising a valve tube (1), characterized in that: The outer surface of the valve tube (1) is provided with two symmetrical flow ports (19), and a fixed tube (18) is fixedly connected to the top of the valve tube (1), and two symmetrical fixed blocks (3) are fixedly connected to the bottom of the fixed tube (18), and a rotating shaft (4) is rotatably connected between the two fixed blocks (3), and a valve plate (2) is fixedly connected to one side of the rotating shaft (4), and a torsion spring (5) is fixedly sleeved on the outer surface of the rotating shaft (4), and grooves (11) are provided on the outer surface of the fixed tube (18) and the bottom of the valve plate (2), and the two ends of the torsion spring (5) are elastically clamped in the inside of the two grooves (11), and the bottom of the valve plate (2) is fixedly connected to the first connecting block (6), and the valve tube (1) A circular opening (10) is provided at the bottom end, and a fixing plate (20) is fixedly connected to the inside of the circular opening (10), and a plug-in column (8) is slidably inserted into the inside of the fixing plate (20), and a sealing plate (21) is fixedly connected to the bottom of the plug-in column (8), and a pressing plate (7) is fixedly sleeved on the outer surface of the top end of the plug-in column (8), and an arc-shaped opening (13) is provided on the outer surface of the first connecting block (6), and two symmetrical second connecting blocks (12) are fixedly connected to the top of the pressing plate (7), and a plug-in column (14) is fixedly connected between the two second connecting blocks (12), and the plug-in column (14) is slidably inserted into the inside of the arc-shaped opening (13), and a compression spring (9) is fixedly connected between the pressing plate (7) and the fixing plate (20).

2. The drilling float valve core according to claim 1, characterized in that: The valve plate (2) is rotatably arranged at the bottom of the fixed tube (18), and a force-bearing plate (17) is fixedly connected to the top of the valve plate (2). The force-bearing plate (17) is rotatably arranged inside the fixed tube (18), and an outer surface of the force-bearing plate (17) is provided with an arc surface.

3. The drilling float valve core according to claim 1, characterized in that: The sealing piece (21) is slidably arranged inside the circular opening (10), and the outer surface of the sealing piece (21) is in contact with the inner wall of the circular opening (10).

4. The drilling float valve core according to claim 1, characterized in that: The two arc-shaped openings (13) are respectively located on both sides of the first connecting block (6), and adjacent sides of the two arc-shaped openings (13) are respectively fitted with both sides of the first connecting block (6), and the bottom of the first connecting block (6) is provided with an arc surface.

5. The drilling float valve core according to claim 1, characterized in that: The fixed tube (18) is located directly above the two circulation ports (19), the bottom of the fixed tube (18) is higher than the top of the circulation ports (19), and the diameter of the valve plate (2) is greater than the inner diameter of the fixed tube (18).

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