Centrifugal vacuum deaerator liquid level automatic regulating device

Abstract

The utility model discloses a centrifugal vacuum degasser liquid level automatic regulating device, including valve body shell, float ball, valve core, outer exhaust joint, inner suction joint and outer suction joint. The valve core is arranged in the valve body shell, is equipped with a plurality of communicating holes on it, wherein the hole that communicates with the outer exhaust joint is long hole to guarantee that the outer exhaust joint always keeps communicating, the hole distance design of the hole that communicates with the inner suction joint and the outer suction joint is when the inner suction joint is completely connected, the outer suction joint is completely closed, and vice versa. The lower end of valve core is connected with float ball through connecting rod, and float ball drives valve core to move up and down under the buoyancy effect of float ball, thereby realizes the alternate switching of inner suction joint and outer suction joint. Through the design, the utility model can automatically adjust the air extraction amount according to the liquid level change, avoids vacuum pump reverse suction or evacuation, realizes the automatic stable control of centrifugal vacuum degasser liquid level, and has the advantages of simple structure, reliable operation, high degassing efficiency and the like.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, and in particular to an automatic liquid level adjustment device for a centrifugal vacuum degasser. Background Technology

[0002] During drilling operations, in order to ensure the stability of drilling fluid performance, it is usually necessary to separate and remove the intruding gas in the drilling fluid through a vacuum degasser, so that the drilling fluid can be restored to its normal specific gravity and viscosity, thereby protecting downstream equipment such as centrifugal pumps and mud pumps, and improving their processing efficiency and service life.

[0003] Existing centrifugal vacuum degassers rely on a vacuum pump to create a negative pressure environment within the tank, enabling gas-liquid separation of the drilling fluid under the action of a high-speed rotating rotor. Compared to jet degassers, centrifugal vacuum degassers offer advantages such as high degassing efficiency, low energy consumption, and reliable structure, and are therefore widely used on drilling platforms.

[0004] However, in existing technologies, the liquid level regulation of centrifugal vacuum degassers typically relies on manual operation of regulating valves. Due to the large fluctuations in the specific gravity of drilling fluid, resulting in frequent changes in flow rate, manual adjustment is not only labor-intensive but also difficult to achieve precise and stable control. When the pumping volume is too high, the mud inside the tank may be sucked back into the vacuum pump, causing it to malfunction; when the pumping volume is insufficient, it can easily lead to cavitation in the tank, preventing the degasser from operating normally. Therefore, how to achieve automatic and stable liquid level regulation in centrifugal vacuum degassers has become an urgent technical problem to be solved. Utility Model Content

[0005] The purpose of this invention is to provide an automatic liquid level adjustment device for a centrifugal vacuum degasser. This device can automatically switch the pumping channel according to the changes in the liquid level in the tank, thereby achieving automatic and stable control of the liquid level, ensuring the continuous and efficient operation of the vacuum degasser, avoiding damage to the vacuum pump, and reducing manual intervention.

[0006] This utility model is achieved by the following technical solution: an automatic liquid level adjustment device for a centrifugal vacuum degasser, characterized in that it includes a valve body shell, a float, a valve core, an external exhaust connector connected to a vacuum pump, an internal intake connector connected to the centrifugal vacuum degasser tank, and an external intake connector connected to the atmosphere. The float is connected to the valve core through a connecting rod and is used to drive the valve core to move within the valve body shell, thereby realizing the alternating switching of the internal intake connector and the external intake connector, and the external exhaust connector is always connected to the valve core.

[0007] Furthermore, the valve core is provided with multiple holes, and the holes used to communicate with the external exhaust connector are elongated holes to ensure that the external exhaust connector remains connected when the valve core is in different positions.

[0008] Furthermore, the holes on the valve core for communicating with the inner and outer suction connectors are spaced apart by a distance of one diameter less than the distance between the mounting holes of the inner and outer suction connectors on the valve body shell, so as to ensure that the outer suction connector is completely closed when the inner suction connector is fully connected, and vice versa.

[0009] Furthermore, a return spring is provided below the float to apply a return force to the float.

[0010] Furthermore, the lower end of the valve core extends out of the valve body housing, and the float is fixed to the connecting rod at the lower end of the valve core by a wing nut.

[0011] Furthermore, the valve body housing locks the valve core with a lower cover to limit the lowest position of the float.

[0012] Furthermore, the float is made of hollow corrosion-resistant metal or engineering plastic to adapt to drilling fluid environments with different densities and corrosiveness.

[0013] The automatic liquid level adjustment device for a centrifugal vacuum degasser described in this utility model has the following advantages: By linking the float ball with the valve core, the internal and external air intake connections can be automatically switched, eliminating the need for frequent manual operation and improving adjustment accuracy and reliability.

[0014] The external exhaust connector is always connected to the vacuum pump. It provides the maximum pumping volume when the liquid level is too low and automatically reduces the pumping volume when the liquid level rises to prevent mud from being sucked back into the vacuum pump or the equipment from being sucked into the air.

[0015] By maintaining a stable liquid level in the tank, not only is the degassing efficiency improved, but the service life of the vacuum pump and subsequent equipment is also effectively extended. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the installation of this utility model; Figure 2 This is a cross-sectional schematic diagram of the present invention; In the diagram: 1-valve body shell, 2-external exhaust connector, 3-internal suction connector, 4-external suction connector, 5-lower cover, 6-valve core, 7-reset spring, 8-wing nut, 9-float ball, 10-centrifugal vacuum degasser, 11-vacuum pump, 12-automatic regulating valve, 13-upper end cap of centrifugal vacuum degasser. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0020] like Figure 1-2 As shown, this embodiment provides an automatic liquid level adjustment device for a centrifugal vacuum degasser, including a valve body shell 1, an external exhaust connector 2, an internal suction connector 3, an external suction connector 4, a lower cover 5, a valve core 6, a return spring 7, a butterfly nut 8, a float ball 9, a centrifugal vacuum degasser 10, a vacuum pump 11, an automatic regulating valve 12, and an upper cover 13 for the centrifugal vacuum degasser.

[0021] The automatic regulating valve 12 is installed at the upper end cap 13 of the centrifugal vacuum degasser 10. Its valve body shell 1 has mounting holes for installing the external exhaust connector 2, internal suction connector 3, and external suction connector 4. The internal suction connector 3 is located inside the tank of the centrifugal vacuum degasser 10, and the external suction connector 4 is located outside the tank of the centrifugal vacuum degasser 10. The external exhaust connector 2 is connected to the vacuum pump 11 for continuous evacuation. The valve core 6 is arranged inside the valve body shell 1 and has multiple connecting holes on its surface. The holes connecting to the external exhaust connector 2 are elongated holes, ensuring that the external exhaust connector 2 is always connected regardless of the valve core 6's position. The holes connecting to the internal suction connector 3 and the external suction connector 4 are spaced apart by a diameter less than the distance between the mounting holes of the internal suction connector 3 and the external suction connector 4 on the valve body shell 1. Therefore, when the internal suction connector 3 is fully connected, the external suction connector 4 is fully closed, and vice versa.

[0022] A connecting rod extending from the lower end of the valve core 6 out of the valve body housing 1 is fixedly connected to the float 9. The float 9 is locked to the connecting rod by a butterfly nut 8 and remains stably reset under the action of the return spring 7. When the liquid level in the tank 10 drops, the float 9 falls due to gravity, causing the valve core 6 to move downward, keeping the internal suction connector 3 connected to the external exhaust connector 2, while the external suction connector 4 is closed. At this time, the vacuum pump 11 rapidly draws air from inside the tank 10, with the maximum suction volume, thereby causing the liquid level in the tank to gradually rise. As the liquid level rises, the float 9 moves the valve core 6 upward under the action of buoyancy, gradually closing the internal suction connector 3 and gradually opening the external suction connector 4, while the external exhaust connector 2 remains connected. At this time, the suction volume of the vacuum pump 11 decreases accordingly, and the liquid level in the tank tends to be balanced. When the discharged liquid and the sucked liquid cancel each other out, the float 9 remains in the equilibrium position, and the entire system maintains stable operation.

[0023] In this embodiment, the valve core 6 moves up and down within the valve body housing 1 via the lifting and lowering of the float 9. Utilizing the interlocking relationship of the valve core hole structure, the alternating switching between the internal suction connector 3 and the external suction connector 4 is achieved, while ensuring that the external exhaust connector 2 is always connected to the vacuum pump 11. This not only avoids the problem of mud backflow caused by excessive vacuum pumping but also prevents cavitation caused by insufficient pumping, enabling the centrifugal vacuum degasser 10 to achieve automatic liquid level adjustment without manual intervention. This device has a compact structure, simple manufacturing process, and safe and reliable operation, improving degassing efficiency and extending the service life of the vacuum pump and subsequent equipment.

[0024] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A liquid level automatic regulating device for a centrifugal type vacuum deaerator, characterized by, The valve body includes a valve shell (1), a float (9), a valve core (6), an external exhaust connector (2) connected to a vacuum pump (11), an internal intake connector (3) connected to the tank of a centrifugal vacuum degasser (10), and an external intake connector (4) connected to the atmosphere. The float (9) is connected to the valve core (6) via a connecting rod and is used to drive the valve core (6) to move within the valve shell (1), thereby achieving the alternating switching of the internal intake connector (3) and the external intake connector (4), and the external exhaust connector (2) is always connected to the valve core (6).

2. The liquid level automatic regulating device of a centrifugal vacuum deaerator according to claim 1, characterized in that, The valve core (6) has multiple holes, and the holes used to communicate with the external exhaust connector (2) are elongated holes to ensure that the external exhaust connector (2) remains connected when the valve core (6) is in different positions.

3. The automatic liquid level adjustment device for a centrifugal vacuum degasser according to claim 2, characterized in that, The holes on the valve core (6) for communicating with the inner suction connector (3) and the outer suction connector (4) are spaced apart by a distance of one hole diameter less than the distance between the holes of the inner suction connector (3) and the outer suction connector (4) on the valve body shell (1), so as to ensure that the outer suction connector (4) is completely closed when the inner suction connector (3) is fully connected, and vice versa.

4. The automatic liquid level adjustment device for a centrifugal vacuum degasser according to claim 1, characterized in that, A return spring (7) is provided below the float (9) to apply a return force to the float (9).

5. The automatic liquid level adjustment device for a centrifugal vacuum degasser according to claim 1, characterized in that, The lower end of the valve core (6) extends out of the valve body shell (1), and the float (9) is fixed to the connecting rod at the lower end of the valve core (6) by a wing nut (8).

6. The automatic liquid level adjustment device for a centrifugal vacuum degasser according to claim 1, characterized in that, The valve body housing (1) locks the valve core (6) by the lower cover (5) to limit the lowest position of the float (9).

7. The liquid level automatic regulating device of a centrifugal vacuum deaerator according to claim 1, characterized in that, The float (9) is made of hollow corrosion-resistant metal or engineering plastic to adapt to drilling fluid environments with different densities and corrosiveness.

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