Negative pressure vibrating screen and negative pressure control device thereof

Abstract

The utility model relates to the technical field of drilling fluid solid phase control, and discloses a negative pressure vibrating screen and a negative pressure control device thereof, the negative pressure control device comprises a speed regulation assembly and an intermittent suction valve arranged on a negative pressure pipeline of the negative pressure vibrating screen, and the speed regulation assembly is connected with a valve core of the intermittent suction valve. The valve element is driven to rotate, and connection and disconnection of the negative pressure pipeline are changed. According to the negative pressure control device, the valve element of the intermittent suction valve can be driven to rotate through the speed adjusting assembly, then on-off of the negative pressure pipeline is changed, when the negative pressure pipeline is connected, the negative pressure pump sucks the negative pressure vibrating screen through the negative pressure pipeline and the intermittent suction valve, and drilling fluid carried by rock debris can be recycled; on the contrary, when the negative pressure pipeline is blocked, the negative pressure pipeline cannot suck the negative pressure vibrating screen any more, fine rock debris on the screen mesh can be smoothly discharged, and the screen mesh is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling fluid solid phase control, and more specifically, to a negative pressure control device. In addition, the utility model also relates to a negative pressure vibrating screen including the negative pressure control device. Background Art

[0002] Negative pressure vibrating screen can remove harmful solid phase in drilling fluid, recover drilling fluid carried by cuttings, reduce the loss of drilling fluid, and reduce the discharge of drilling waste. It is widely used in the field of drilling fluid solid phase control.

[0003] At present, most negative pressure vibrating screens adopt continuous suction, which makes it easy for fine rock chips to be adsorbed on the screen of the negative pressure vibrating screen under the action of negative pressure, resulting in blockage of the screen and affecting the processing effect of the negative pressure vibrating screen.

[0004] In summary, how to prevent rock cuttings from clogging the screen of the negative pressure vibrating screen is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a negative pressure control device, which realizes intermittent negative pressure suction, and the time of intermittent suction is adjustable, which effectively avoids the adhesion of rock chips to the screen and causes the screen to be blocked.

[0006] In addition, the utility model also provides a negative pressure vibrating screen including the negative pressure control device.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A negative pressure control device, used for a negative pressure vibrating screen, comprises a speed regulating component and an intermittent suction valve arranged in the negative pressure pipeline of the negative pressure vibrating screen, wherein the speed regulating component is connected to the valve core of the intermittent suction valve to drive the valve core to rotate and change the on-off of the negative pressure pipeline.

[0009] Preferably, the intermittent suction valve comprises a valve body and the valve core rotatably arranged in the valve body, the outer periphery of the valve body is provided with at least one through hole arranged in the axial direction, and the outer periphery of the valve core is provided with a blocking plate for blocking the through hole;

[0010] When the valve core rotates until the blocking plate covers the through hole, the negative pressure pipeline is blocked and there is no negative pressure at the suction valve inlet of the intermittent suction valve;

[0011] When the valve core rotates until the blocking plate leaves the through hole, the negative pressure pipeline is connected and negative pressure is formed at the inlet of the suction valve.

[0012] Preferably, the valve core includes a central axis, the blocking plate and a support plate arranged along the axial direction of the central axis, and the blocking plate is connected to the central axis through the support plate.

[0013] Preferably, the support plates are arranged at equal intervals along the axial direction of the central axis.

[0014] Preferably, two through holes are provided on the outer periphery of the valve body, and the two through holes are respectively connected to the suction valve inlet and the suction valve outlet of the valve body.

[0015] Preferably, it also includes a flow control valve for adjusting the vacuum degree of the negative pressure vibrating screen, and the flow control valve is connected to the suction valve outlet of the intermittent suction valve so that the vacuum degree can be adjusted by adjusting the opening of the flow control valve.

[0016] Preferably, the speed regulating assembly comprises a speed regulating motor, and the valve core is connected to an output shaft of the speed regulating motor.

[0017] A negative pressure vibrating screen comprises the negative pressure control device described in any one of the above items.

[0018] The negative pressure control device provided by the utility model can drive the valve core of the intermittent suction valve to rotate through the speed regulating component, thereby changing the on-off of the negative pressure pipeline. When the negative pressure pipeline is connected, the negative pressure pump sucks the negative pressure vibrating screen through the negative pressure pipeline and the intermittent suction valve, and can recover the drilling fluid carried by the cuttings; on the contrary, when the negative pressure pipeline is blocked, the negative pressure pipeline can no longer suck the negative pressure vibrating screen, and the fine cuttings on the screen can be discharged smoothly, avoiding clogging of the screen.

[0019] In addition, the utility model also provides a negative pressure vibrating screen including the negative pressure control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a specific embodiment of the negative pressure control device provided by the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the valve body of the intermittent suction valve;

[0023] Figure 3 It is a schematic diagram of the structure of the valve core of the intermittent suction valve.

[0024] Figure 1-Figure 3 middle:

[0025] 1 is a speed regulating motor, 2 is an intermittent suction valve, 21 is a valve body, 211 is a center tube, 212 is a through hole, 213 is a flange, 22 is a transition chamber, 23 is a suction valve inlet, 24 is a valve core, 241 is a center axis, 242 is a support plate, 243 is a blocking plate, 25 is a bearing, 26 is a valve cover, 27 is a suction valve outlet, 28 is a three-way connector, and 3 is an electric valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The core of the utility model is to provide a negative pressure control device, which realizes intermittent negative pressure suction, and the time of intermittent suction is adjustable, which effectively avoids the adhesion of rock chips to the screen and causes the screen to be blocked.

[0028] In addition, the utility model also provides a negative pressure vibrating screen including the negative pressure control device.

[0029] The utility model provides a negative pressure control device for use with a negative pressure vibrating screen, comprising a speed regulating component and an intermittent suction valve 2 arranged in the negative pressure pipeline of the negative pressure vibrating screen, wherein the speed regulating component is connected to a valve core 24 of the intermittent suction valve 2 to drive the valve core 24 to rotate and change the on-off of the negative pressure pipeline.

[0030] Among them, the specific type and model of the intermittent suction valve 2 are determined according to the actual production needs, and the structure of the speed regulating component is determined according to the type and structure of the intermittent suction valve 2 to ensure that the speed regulating component can drive the valve core 24 of the intermittent suction valve 2 to rotate and can adjust the rotation speed of the above-mentioned valve core 24.

[0031] Preferably, please refer to Figure 1 A speed regulating assembly may be provided, including a speed regulating motor 1, wherein the valve core 24 is connected to the output shaft of the speed regulating motor 1, the transmission structure is simple, the control is convenient, and the speed regulating accuracy of the valve core 24 is high.

[0032] Of course, a reducer may be provided between the speed regulating motor 1 and the valve core 24 as required.

[0033] In this embodiment, the speed regulating component drives the valve core 24 of the intermittent suction valve 2 to rotate, thereby changing the on-off state of the negative pressure pipeline. When the negative pressure pipeline is connected, the negative pressure pump sucks the negative pressure vibrating screen through the negative pressure pipeline and the intermittent suction valve 2, so as to recover the drilling fluid carried by the cuttings. On the contrary, when the negative pressure pipeline is blocked, the negative pressure pipeline can no longer suck the negative pressure vibrating screen, and the fine cuttings on the screen can be discharged smoothly, thus avoiding the blockage of the screen.

[0034] On the basis of the above embodiment, the structure of the intermittent suction valve 2 is defined. The intermittent suction valve 2 includes a valve body 21 and a valve core 24 rotatably disposed in the valve body 21. The outer periphery of the valve body 21 is provided with at least one through hole 212 disposed in the axial direction. The outer periphery of the valve core 24 is provided with a blocking plate 243 for blocking the through hole 212.

[0035] When the valve core 24 rotates until the blocking plate 243 covers the through hole 212, the negative pressure pipeline is blocked and there is no negative pressure at the suction valve inlet 23 of the intermittent suction valve 2;

[0036] When the valve core 24 rotates until the blocking plate 243 leaves the through hole 212 , the negative pressure pipeline is opened and negative pressure is formed at the suction valve inlet 23 .

[0037] Please refer to Figure 1 , flanges 213 are provided at both ends of the valve body 21, and a plurality of bolt mounting holes are provided on the flange 213 along the circumferential direction, and the flange 213 connects the valve body 21 and the valve covers 26 at both ends;

[0038] The outer periphery of the valve body 21 is provided with a suction valve inlet 23 and a suction valve outlet 27, and the suction valve inlet 23 and the suction valve outlet 27 are connected with the through hole 212 of the valve body 21 through the transition chamber 22;

[0039] The valve core 24 is rotatably connected to the valve cover 26 via a bearing 25 , and one end of a central axis 241 of the valve core 24 protrudes out of the valve cover 26 so that the central axis 241 is connected to the speed regulating assembly.

[0040] In order to enable the blocking plate 243 to effectively close the through hole 212, the blocking plate 243 is mostly set as an arc plate; the number, structure and size of the blocking plate 243 are determined according to the number, size and distribution of the through holes 212 on the central tube 211 during actual production.

[0041] It should be noted that when there are two or more blocking plates 243 , when any one blocking plate 243 completely covers the through hole 212 , all the through holes 212 are blocked by the blocking plate 243 to accurately switch the on / off state of the negative pressure pipeline.

[0042] For example, see Figure 1 and Figure 2The outer periphery of the valve body 21 is provided with two through holes 212, and the two through holes 212 are respectively connected to the suction valve inlet 23 and the suction valve outlet 27 of the valve body 21;

[0043] At least two blocking plates 243 are disposed on the outer periphery of the valve core 24 to simultaneously close or leave the two through holes 212 .

[0044] In this embodiment, the intermittent suction valve 2 changes the relative position of the blocking plate 243 and the through hole 212 by rotating the valve core 24, thereby adjusting the on-off state of the intermittent suction valve 2, which has a simple structure, convenient control and low cost.

[0045] On the basis of the above embodiment, the structure of the valve core 24 is defined. The valve core 24 includes a central axis 241 , a blocking plate 243 and a support plate 242 arranged axially along the central axis 241 . The blocking plate 243 is connected to the central axis 241 through the support plate 242 .

[0046] Please refer to Figure 3 The central shaft 241 is key-connected with the output shaft of the speed regulating assembly. The central shaft 241 is provided with at least two circular support plates 242 equidistantly along the axial direction. The blocking plate 243 is connected to the central shaft 241 through the support plates 242 .

[0047] On the basis of the above embodiment, in order to facilitate the control of the vacuum degree of the negative pressure vibrating screen, the negative pressure control device also includes a flow control valve for adjusting the vacuum degree of the negative pressure vibrating screen. The flow control valve is connected to the suction valve outlet 27 of the intermittent suction valve 2 so that the vacuum degree can be adjusted by adjusting the opening of the flow control valve.

[0048] The flow control valve can be set as follows Figure 1 The electric valve 3 shown can also be set as a mechanical valve. Its specific type and model are determined according to the working environment of the negative pressure vibrating screen in actual production, the vacuum adjustment range and other design requirements, and will not be repeated here.

[0049] To facilitate assembly and control of the flow control valve, the flow control valve is usually connected to the suction valve outlet 27 of the intermittent suction valve 2 via a three-way valve or a three-way joint 28 .

[0050] In addition to the above-mentioned negative pressure control device, the present invention also provides a negative pressure vibrating screen including the negative pressure control device disclosed in the above-mentioned embodiment. For the structures of other parts of the negative pressure vibrating screen, please refer to the prior art and will not be described in detail herein.

[0051] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0052] The negative pressure vibrating screen and the negative pressure control device provided by the utility model are introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A negative pressure control device for a negative pressure vibrating screen, characterized in that: It comprises a speed regulating component and an intermittent suction valve (2) arranged on the negative pressure pipeline of the negative pressure vibrating screen, wherein the speed regulating component is connected to the valve core (24) of the intermittent suction valve (2) to drive the valve core (24) to rotate and change the on-off state of the negative pressure pipeline; The intermittent suction valve (2) comprises a valve body (21) and a valve core (24) rotatably arranged in the valve body (21); the outer periphery of the valve body (21) is provided with at least one through hole (212) arranged in the axial direction; the outer periphery of the valve core (24) is provided with a blocking plate (243) for blocking the through hole (212); The outer periphery of the valve body (21) is provided with a suction valve inlet (23) and a suction valve outlet (27), and the suction valve inlet (23) and the suction valve outlet (27) are connected to the through hole (212) through the transition chamber (22); When the valve core (24) rotates until the blocking plate (243) covers the through hole (212), the negative pressure pipeline is blocked and there is no negative pressure at the suction valve inlet (23); When the valve core (24) rotates until the blocking plate (243) leaves the through hole (212), the negative pressure pipeline is opened and negative pressure is formed at the suction valve inlet (23); It also includes a flow control valve for adjusting the vacuum degree of the negative pressure vibrating screen, and the flow control valve is connected to the suction valve outlet (27) so that the vacuum degree can be adjusted by adjusting the opening of the flow control valve.

2. The negative pressure control device according to claim 1, characterized in that: The valve core (24) comprises a central axis (241), the blocking plate (243) and a support plate (242) arranged along the axial direction of the central axis (241), and the blocking plate (243) is connected to the central axis (241) via the support plate (242).

3. The negative pressure control device according to claim 2, characterized in that: The support plates (242) are arranged at equal intervals along the axial direction of the central axis (241).

4. The negative pressure control device according to claim 1, characterized in that: The outer periphery of the valve body (21) is provided with two through holes (212), and the two through holes (212) are respectively connected to the suction valve inlet (23) and the suction valve outlet (27) of the valve body (21).

5. The negative pressure control device according to any one of claims 1 to 4, characterized in that: The speed regulating assembly comprises a speed regulating motor (1), and the valve core (24) is connected to the output shaft of the speed regulating motor (1).

6. A negative pressure vibrating screen, characterized in that: Comprising the negative pressure control device according to any one of claims 1 to 5.

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