Liquid drainage structure of negative pressure vibrating screen

Abstract

The utility model relates to the technical field of vibrating screens, and provides a liquid drainage structure of a negative pressure vibrating screen, which is characterized by comprising a liquid drainage funnel connected with a screen box, the lower end of the liquid drainage funnel is connected with a liquid drainage pipe, and the lower end of the liquid drainage pipe is provided with a liquid passing plate; a mounting cylinder is vertically communicated with the side surface of the liquid discharging pipe, the mounting cylinder is close to the edge of the liquid discharging pipe, and a material digging rotor is rotationally connected into the mounting cylinder and is arranged on the upper side of the liquid passing plate; and one side of the mounting cylinder communicates with a blow-off pipe, materials are transferred to the blow-off pipe through the digging rotor, and a blow-off valve is arranged on the blow-off pipe. The liquid discharging pipe can be dredged very conveniently, materials with high viscosity are effectively prevented from blocking liquid, and it is guaranteed that the liquid discharging pipe is unblocked in time.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, in particular to a liquid discharge structure of a negative pressure vibrating screen. Background Art

[0002] In order to reduce pollution and achieve emission reduction, efficient, economical, green and environmentally friendly oil extraction has become a major trend. However, the drilling fluid obtained from actual extraction often carries a lot of drill cuttings, so it is necessary to separate the drilling fluid from the drill cuttings. The separation process often uses a negative pressure vibrating screen for negative pressure recovery. Therefore, the development of a negative pressure vibrating screen with high purification capacity and low liquid content has become one of the directions.

[0003] When the vibrating screen screens materials with high liquid content, liquid and fluid-like objects (such as mud, etc.) enter the screen box together. The existing negative pressure vibrating screen structure is that the lower side of the screen box is connected to the manifold, and the manifold is connected to the drainage box. The drainage box uses the pressure balance principle to achieve sealed discharge of liquid. However, the box structure with pressure balance sealed drainage always requires a drainage box, so liquid will be deposited in the box and then discharged through the pipes in the box. However, when too much drilling fluid with high density and viscosity is deposited in the box, it will inevitably cause pipe blockage, and then make the negative pressure system in the box ineffective. Utility Model Content

[0004] The utility model aims to provide a drainage structure of a negative pressure vibrating screen, which can facilitate the unblocking of a drainage pipe, effectively avoid the blockage of materials with high viscosity, and ensure the timely unblocking of the drainage pipe.

[0005] The embodiment of the utility model is realized through the following technical scheme: a drainage structure of a negative pressure vibrating screen, characterized in that: it includes a drainage funnel connected to the screen box, the lower end of the drainage funnel is connected to a drainage pipe, and the lower end of the drainage pipe is provided with a liquid passing plate; the side of the drainage pipe is vertically connected with a mounting cylinder, and the mounting cylinder is close to the edge of the drainage pipe, and a digging rotor is rotatably connected in the mounting cylinder, and the digging rotor is arranged on the upper side of the liquid passing plate; one side of the mounting cylinder is connected with a sewage pipe, and the material is transferred to the sewage pipe through the digging rotor, and a sewage valve is provided on the sewage pipe.

[0006] Preferably, it also includes a cleaning scraper ring, which is arranged above the inner wall of the drain pipe and fits closely therewith, and the outside of the drain pipe is slidably connected with a driving magnetic ring, which drives the driving magnetic ring to move along the drain pipe and attracts the cleaning scraper ring to move synchronously.

[0007] Preferably, a ball is embedded in the inner wall of the driving magnetic ring, and the ball is in rolling contact with the outer surface of the drain pipe.

[0008] Preferably, both side openings of the cleaning scraper ring are of conical structure.

[0009] Preferably, the mounting tubes are provided in two groups and are symmetrically arranged on both sides of the drainage pipe, and a liquid gap is left between the two digging rotors.

[0010] Preferably, the sewage discharge pipe is inclined toward the lower side of the liquid discharge pipe.

[0011] Preferably, the drainage funnel is equipped with a sensor, and the sensor is electrically connected to the digging rotor.

[0012] The technical solution of the embodiments of the utility model has at least the following advantages and beneficial effects: compared with the prior art, the utility model arranges a digging rotor above the liquid passing plate. When the discharge pipe is blocked, the liquid level will gradually rise to the discharge funnel, thereby opening the drain valve and driving the digging rotor to rotate to dig materials with higher viscosity into the discharge pipe. After the liquid blocking material on the liquid passing plate is cleaned, the liquid can be discharged normally through the liquid passing plate. This structure effectively solves the problem of blockage in the discharge pipe, and the cleaning is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of a liquid discharge structure of a negative pressure vibrating screen provided in an embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the liquid discharge structure in the utility model when it is installed on the vibrating screen;

[0016] Figure 3 It is a structural schematic diagram of the cleaning scraper ring and the driving magnetic ring in the utility model.

[0017] Icons: 1-drain funnel, 2-drain pipe, 3-installation cylinder, 4-digging rotor, 5-drain pipe, 6-drain valve, 7-liquid plate, 8-cleaning scraper ring, 9-driving magnetic ring, 10-ball, 11-sensor. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] Example

[0022] The following is further described in conjunction with specific embodiments. Figure 1-Figure 3 As shown, this embodiment is a drainage structure of a negative pressure vibrating screen, which is characterized by: comprising a drainage funnel 1 connected to the screen box, the lower end of the drainage funnel 1 is connected to a drainage pipe 2, and the lower end of the drainage pipe 2 is provided with a liquid passing plate 7; the side of the drainage pipe 2 is vertically connected with a mounting cylinder 3, and the mounting cylinder 3 is close to the edge of the drainage pipe 2, and a digging rotor 4 is rotatably connected in the mounting cylinder 3, and the digging rotor 4 is arranged on the upper side of the liquid passing plate 7; one side of the mounting cylinder 3 is connected with a sewage pipe 5, and the material is transferred to the sewage pipe 5 through the digging rotor 4, and the sewage pipe 5 is provided with a sewage valve 6; specifically, the utility model By setting a detachable drainage funnel 1 connected with the screen box, the fluid and liquid dropped from the screen enter the drainage funnel 1 and the drainage pipe 2. When the material with high viscosity accumulates too much on the liquid passing plate 7 and causes blockage, the liquid cannot pass through the liquid passing plate 7 normally, and the liquid gradually accumulates and overflows into the drainage funnel 1, thereby driving the digging rotor 4 to rotate. During the rotation process, the material is continuously centrifuged and discharged into the sewage pipe 5. Because the digging rotor 4 is close to the liquid passing plate 7, after the digging rotor 4 has been running for a certain period of time, most of the high-viscosity liquid-resistant materials accumulated on the liquid passing plate 7 are cleaned up, and the liquid passing plate 7 resumes its normal drainage function.

[0023] It should be noted that in order to avoid secondary blockage of the sewage pipe 5, the length of the sewage pipe 5 is relatively short.

[0024] Reference Figure 1As shown, in order to improve the cleaning effect, the present embodiment further provides a cleaning scraper ring 8, which is arranged above the inner wall of the drain pipe 2 and fits closely therewith. The outside of the drain pipe 2 is slidably connected with a driving magnetic ring 9, which drives the driving magnetic ring 9 to move along the drain pipe 2, and the driving magnetic ring 9 attracts the cleaning scraper ring 8 to move synchronously; specifically, the cleaning scraper ring 8 is initially located at the top of the drain pipe 2. Normally, some sticky materials will also be attached to the inner wall of the drain pipe 2. When the driving magnetic ring 9 moves downward, it will drive the cleaning scraper ring 8 to repeatedly scrape the inner wall of the drain pipe 2, and the waste will fall to the digging rotor 4 and the liquid plate 7 to be cleaned again.

[0025] like Figure 1 As shown, in order to reduce the friction force of the linear reciprocating motion of the driving magnetic ring 9 , a ball 10 is embedded in the inner wall of the driving magnetic ring 9 , and the ball 10 is in rolling contact with the outer surface of the discharge pipe 2 .

[0026] Reference Figure 3 As shown, the openings on both sides of the cleaning scraper ring 8 are of conical structure. The conical opening can avoid material accumulation and also facilitate the formation of sharp cleaning scrapers to act on the inner wall of the pipe.

[0027] like Figure 1 As shown, the mounting tubes 3 in this embodiment are provided with two groups and are symmetrically arranged on both sides of the drainage pipe 2, and a liquid gap is left between the two digging rotors 4; specifically, the digging rotors 4 are arranged on both sides of the drainage pipe 2 to help improve the cleaning range and ensure that the liquid passes through the liquid gap before being discharged from the drainage pipe 2, thereby reducing the impact on normal drainage.

[0028] like Figure 1 As shown, the sewage pipe 5 is inclined toward the lower side of the liquid discharge pipe 2, so that the viscous material can automatically flow out under the action of gravity.

[0029] When the drain pipe 2 is blocked, liquid material accumulates and overflows into the drain funnel 1, so the drain funnel 1 is equipped with a sensor 11, such as a liquid level sensor, and the sensor 11 is electrically connected to the digging rotor 4. When the sensor 11 detects that the water is full, it will feedback a signal to energize and clear the digging rotor 4.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid discharge structure for a negative pressure vibrating screen, characterized in that: It comprises a drainage funnel (1) connected to a screen box, the lower end of the drainage funnel (1) is connected to a drainage pipe (2), and the lower end of the drainage pipe (2) is provided with a liquid passing plate (7); A mounting tube (3) is vertically connected to the side of the liquid discharge pipe (2), and the mounting tube (3) is close to the edge of the liquid discharge pipe (2). A material digging rotor (4) is rotatably connected in the mounting tube (3), and the material digging rotor (4) is arranged on the upper side of the liquid passing plate (7); One side of the installation cylinder (3) is connected to a sewage pipe (5), and the material is transferred to the sewage pipe (5) through the digging rotor (4), and a sewage valve (6) is provided on the sewage pipe (5).

2. The liquid discharge structure of the negative pressure vibrating screen according to claim 1, characterized in that: It also includes a cleaning scraper ring (8), which is arranged above the inner wall of the drainage pipe (2) and fits closely therewith. The outside of the drainage pipe (2) is slidably connected with a driving magnetic ring (9), and by driving the driving magnetic ring (9) to move along the drainage pipe (2), the driving magnetic ring (9) attracts the cleaning scraper ring (8) to move synchronously.

3. The liquid discharge structure of the negative pressure vibrating screen according to claim 2, characterized in that: A ball (10) is embedded in the inner wall of the driving magnetic ring (9), and the ball (10) is in rolling contact with the outer surface of the drainage pipe (2).

4. The liquid discharge structure of the negative pressure vibrating screen according to claim 2, characterized in that: The openings on both sides of the cleaning scraper ring (8) are of conical structure.

5. The liquid discharge structure of the negative pressure vibrating screen according to claim 1, characterized in that: The installation cylinders (3) are provided in two groups and are symmetrically arranged on both sides of the liquid discharge pipe (2), and a liquid gap is left between the two digging rotors (4).

6. The liquid discharge structure of the negative pressure vibrating screen according to claim 1, characterized in that: The sewage discharge pipe (5) is inclined toward the lower side of the liquid discharge pipe (2).

7. The liquid discharge structure of the negative pressure vibrating screen according to claim 1, characterized in that: The drainage funnel (1) is equipped with a sensor (11), and the sensor (11) is electrically connected to the digging rotor (4).

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