A jet for transporting ore slurry

Abstract

The utility model discloses a kind of jet for conveying ore pulp, including body (1), jet pipe (2), feed pipe (3), mixed flow pipe (4), eccentric circular cavity is equipped in body (1) inside, the outer thread of jet pipe (2) outlet end is matched with the inner thread of body (1) right end port and is matched coupling;Feed pipe (3) outer thread is matched with the inner thread in the feed port of body (1) and is matched coupling;Mixed flow pipe (4) inlet end outer thread is matched with the inner thread of body (1) left end port and is matched coupling.The utility model has long service life, easy wearing parts can be individually replaced, low in use cost, small pressure loss, high conveying efficiency, ore pulp flow smooth and not easy to block and the like, and can effectively prevent ore pulp deposition and scale formation in pipeline, reduce cleaning maintenance workload.

Description

Technical Field

[0001] This utility model belongs to the field of online sampling and testing technology, specifically relating to a jet pump used for conveying slurry in an online slurry grade testing system. Background Technology

[0002] The jet injector operates based on the principle of a Venturi vacuum generator. Its main structure consists of a nozzle, a suction chamber, and a diffuser, and it is typically made of materials such as PVC, stainless steel, and plexiglass. It is mainly used in gas dosing systems and water treatment, achieving gas transfer and reagent dosing by generating a vacuum and mixing solution.

[0003] Ejectors are widely used in industry due to their simple structure and ease of use and maintenance. Because the medium inside an ejector flows at high speed, it is suitable for conveying gases, water, or solutions of mixed media. However, when used in online sampling and testing in mining and mineral processing plants, the high-speed flow of the slurry—a mixture of suspended ore particles and water—causes significant wear on the ejector nozzle and mixing pipe, leading to increased orifice diameter, reduced negative pressure generation, and decreased conveying capacity. Slurry easily deposits and scales at the outlet of the mixing pipe, causing a reduction in the outlet diameter or even blockage, severely shortening the ejector's lifespan. For these reasons, traditional ejectors are unsuitable for slurry conveying applications. Summary of the Invention

[0004] This utility model addresses the problems of easy wear, scaling, clogging, and insufficient service life of existing jets used for online sampling and testing in mining and mineral processing plants, and improves the design of a jet for conveying slurry.

[0005] To achieve the above-mentioned objectives of this utility model, the ejector for conveying slurry adopts the following technical solution:

[0006] This utility model discloses an ejector for conveying mineral slurry. The ejector includes a body, an ejector pipe, a feed pipe, and a mixing pipe. Its features are:

[0007] The main body is a cylinder with an eccentric circular cavity inside. A plane is obliquely cut on the outside of the main body, and a feed port communicating with the eccentric circular cavity is opened on the obliquely cut plane. The feed port is provided with internal threads. Internal threads are also provided in the left and right ports of the main body.

[0008] The jet tube outlet end is provided with an external thread, and the external thread at the jet tube outlet end is matched and connected with the internal thread at the right port of the body.

[0009] The feed pipe is provided with an external thread, which is matched and connected with the internal thread in the feed port of the body.

[0010] The inlet end of the mixing tube is provided with an external thread, which is matched and connected with the internal thread of the left port of the body.

[0011] The wear of the jet ejector mainly occurs in the parts where the slurry flows at high speed, specifically at the outlet end of the jet tube and the inlet end of the mixing tube. To ensure the wear resistance of the jet ejector, this invention also includes a first wear-resistant ceramic tube and a second wear-resistant ceramic tube; the first wear-resistant ceramic tube is embedded in the inlet end of the mixing tube and fixed to the mixing tube with a first stop screw; the second wear-resistant ceramic tube is embedded in the outlet end of the jet tube and fixed to the jet tube with a second stop screw.

[0012] Preferably, the middle section of the mixing pipe adopts a conical flared design, and the straight section of the outlet section of the mixing pipe is provided with a spiral groove.

[0013] Preferably, the cone angle of the conical nozzle is 7 to 9°. An angle that is too large will cause the slurry particles to stratify during flow, while an angle that is too small will increase the total length of the jet injector.

[0014] Preferably, the spiral groove has a pitch of 4–6 mm, a groove width of 1.3–1.8 mm, and a groove depth of 0.4–0.6 mm. The spiral groove serves to force fluid rotation and prevent the deposition of slurry particles.

[0015] Preferably, the angle between the neutral line of the feed tube and the neutral line of the body is 55° to 65°.

[0016] To enhance the sealing effect, a second rubber sealing gasket is installed between the right port of the main body and the outlet end of the jet pipe; a third rubber sealing gasket is installed between the outer circumferential surface of the main body and the outlet end of the feed pipe; and a first rubber sealing gasket is installed between the left port of the main body and the inlet end of the mixing pipe.

[0017] Compared with the prior art, the jet ejector for conveying slurry of this utility model, after adopting the above technical solution, has the following beneficial effects:

[0018] (1) Because the outlet end of the jet tube and the inlet end of the mixing tube are made of wear-resistant ceramic materials, the wear resistance of the jet is greatly improved and the service life of the jet is extended.

[0019] (2) Since the wear-prone parts of the jet ejector are designed to be replaceable, the wear-resistant ceramic can be replaced separately when it is worn, avoiding the need to replace the entire jet ejector and reducing the cost of use.

[0020] (3) The use of a conical bell mouth design in the middle section of the mixing tube improves pressure recovery efficiency and reduces pressure loss.

[0021] (4) Because the straight pipe section of the mixed flow pipe outlet is equipped with spiral grooves, the slurry flow rotates and is output, which can effectively prevent slurry deposition and scaling in the pipe and reduce the amount of cleaning and maintenance work.

[0022] (5) Because traditional jet injectors use a vertical angle to suck in materials, the slurry flow directly impacts the cavity, resulting in a large pressure loss and low conveying efficiency. This utility model adopts a beveled assembly design for the feed pipe and the main body, which reduces the impact of the slurry flow on the main body, improves the conveying efficiency, and makes the slurry flow smoother and less prone to clogging. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a jet ejector structure for conveying slurry according to the present invention.

[0024] The attached figures are labeled as follows: 1-body; 2-jet tube; 3-feed tube; 4-mixing tube; 5-first wear-resistant ceramic tube; 6-second wear-resistant ceramic tube; 7-first stop screw; 8-second stop screw; 9-first rubber gasket; 10-second rubber gasket; 11-third rubber gasket; 12-spiral groove. Detailed Implementation

[0025] To better describe the present invention, the following detailed description of an ejector for conveying slurry is provided in conjunction with the accompanying drawings and embodiments.

[0026] Depend on Figure 1 The schematic diagram of the ejector structure for conveying slurry shown in this utility model indicates that the utility model is composed of a body 1, an ejector pipe 2, a feed pipe 3, a mixing pipe 4, a first wear-resistant ceramic pipe 5, and a second wear-resistant ceramic pipe 6, all connected together.

[0027] The main body 1 is a cylinder with an eccentric circular cavity inside. A plane is obliquely cut on the outside of the main body 1, and a feed port communicating with the eccentric circular cavity is opened on the obliquely cut plane. The feed port is provided with internal threads. Internal threads are also provided in the left and right ports of the main body 1.

[0028] The outlet end of the jet tube 2 is provided with an external thread, which matches and connects with the internal thread of the right port of the body 1. The first wear-resistant ceramic tube 5 is embedded into the inlet end of the mixing tube 4 and is fixed to the mixing tube 4 by a first stop screw 7. The second wear-resistant ceramic tube 6 is embedded into the outlet end of the jet tube 2 and is fixed to the jet tube 2 by a second stop screw 8. A second rubber sealing gasket 10 is installed between the right port of the body 1 and the outlet end of the jet tube 2.

[0029] The feed pipe 3 is provided with an external thread, which matches and connects with the internal thread inside the feed port of the body 1; in this embodiment, the angle between the neutral line of the feed pipe 3 and the neutral line of the body 1 is 60°. A third rubber sealing gasket 11 is installed between the outer tangent of the body 1 and the outlet end of the feed pipe 3.

[0030] The inlet end of the mixing pipe 4 is provided with an external thread, which matches and connects with the internal thread of the left port of the body 1. The middle section of the mixing pipe 4 adopts a tapered flared design; in this embodiment, the cone angle of the tapered flared opening is 8°. A spiral groove 12 is provided inside the straight pipe section of the outlet section of the mixing pipe 4. In this embodiment, the pitch of the spiral groove 12 is 5mm, the groove width is 1.5mm, and the groove depth is 0.5mm. A first rubber sealing gasket 9 is installed between the left port of the body 1 and the inlet end of the mixing pipe 4.

[0031] The working process and principle of this utility model for a jet ejector used to transport slurry are as follows: High-pressure water from the industrial site is used as the power source for the jet ejector. The high-pressure water flows through the nozzle of the jet tube 2. Due to the drastic reduction in the cross-sectional area of ​​the nozzle, the fluid velocity increases dramatically. According to Bernoulli's principle, the increased velocity leads to a sharp decrease in fluid pressure at the nozzle. At this time, the fluid's pressure energy is converted into kinetic energy. The high-speed water jet exits from the nozzle of the jet tube 2 and enters the cavity inside the body 1. Due to the high water velocity, the pressure at the nozzle outlet of the jet tube 2 and the cavity is much lower than atmospheric pressure or ambient pressure, thus forming a vacuum or strong negative pressure zone. Since the outlet end of the feed pipe 3 is connected to the cavity inside the body 1, and the inlet end of the feed pipe 3 is connected to the slurry tank, this pressure difference causes the slurry to be continuously drawn into the cavity. The high-speed water jet carries the slurry into the mixing pipe 4, where the two fluids are fully mixed at the inlet section of the mixing pipe 4, forming a uniform mixed fluid. The mixed fluid then enters the middle section of the mixing pipe 4. The middle section of the mixing tube 4 is a tapered tube with a gradually increasing cross-sectional area. As the fluid flows through it, the flow velocity gradually decreases. According to Bernoulli's principle, the decrease in flow velocity leads to a rise in fluid pressure. At this point, the fluid's kinetic energy is converted back into pressure energy. Finally, the mixed slurry flow is output by the ejector.

[0032] This invention significantly improves the wear resistance of the jet injector and extends its service life by embedding wear-resistant ceramics in the easily worn parts of the jet injector: the jet inlet of the jet tube 2 and the inlet of the mixing tube 4.

[0033] Because the ejector uses a replaceable design for the easily worn parts, the wear-resistant ceramics can be replaced individually when they wear out, avoiding the need to replace the entire ejector and reducing operating costs.

[0034] This invention employs a conical flared design in the middle section of the mixing tube 4 to improve pressure recovery efficiency and reduce pressure loss.

[0035] Because the straight section of the outlet of the mixed flow pipe 4 has a spiral groove 12 inside, the slurry flow rotates and is output, which can effectively prevent slurry deposition and scaling in the pipeline and reduce the amount of cleaning and maintenance work.

[0036] This utility model features a sloped connection between the feed pipe 3 and the main body 1, allowing the slurry to flow obliquely into the mixing pipe 4. This avoids the impact of the slurry flow on the main body 1 caused by vertical entry, improves conveying efficiency, and makes the slurry flow smoother and less prone to blockage.

[0037] It should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," and "top / bottom" used in this utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the parts or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first" and "second" are also only for the convenience of description and distinction, and therefore should not be construed as limitations on this utility model.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A jet ejector for conveying slurry, comprising a body (1), a jet pipe (2), a feed pipe (3), and a mixing pipe (4), characterized in that: The main body (1) is a cylinder with an eccentric circular cavity inside. The main body (1) has a plane obliquely cut on the outside, and a feed port connected to the eccentric circular cavity is opened on the obliquely cut surface. The feed port is provided with an internal thread. The left and right ports of the main body (1) are also provided with internal threads. The jet tube (2) has an external thread at its outlet end, and the external thread at the outlet end of the jet tube (2) is matched and connected with the internal thread at the right port of the body (1); The feed pipe (3) is provided with an external thread, and the external thread of the feed pipe (3) is matched and connected with the internal thread in the feed port of the body (1); The inlet end of the mixing pipe (4) is provided with an external thread, and the external thread at the inlet end of the mixing pipe (4) is matched and connected with the internal thread at the left port of the body (1).

2. The jet ejector for conveying slurry as described in claim 1, characterized in that: It also includes a first wear-resistant ceramic tube (5), which is embedded in the inlet end of the mixing tube (4) and fixed to the mixing tube (4) by a first stop screw (7).

3. The jet ejector for conveying slurry as described in claim 1, characterized in that: It also includes a second wear-resistant ceramic tube (6), which is embedded in the outlet end of the jet tube (2) and fixed to the jet tube (2) by a second stop screw (8).

4. A jet ejector for conveying slurry as described in claim 1, 2, or 3, characterized in that: The middle section of the mixing pipe (4) adopts a conical horn design, and the straight pipe section of the outlet section of the mixing pipe (4) is provided with a spiral groove (12).

5. The jet ejector for conveying slurry as described in claim 4, characterized in that: The cone angle of the conical flare is 7 to 9 degrees.

6. The jet ejector for conveying slurry as described in claim 5, characterized in that: The pitch of the spiral groove (12) is 4-6 mm, the groove width is 1.3-1.8 mm, and the groove depth is 0.4-0.6 mm.

7. The jet ejector for conveying slurry as described in claim 6, characterized in that: The angle between the neutral line of the feed pipe (3) and the neutral line of the body (1) is 55-65°.

8. A jet ejector for conveying slurry as described in claim 7, characterized in that: A second rubber gasket (10) is installed between the right port of the body (1) and the outlet end of the jet pipe (2); a third rubber gasket (11) is installed between the outer tangent of the body (1) and the outlet end of the feed pipe (3); and a first rubber gasket (9) is installed between the left port of the body (1) and the inlet end of the mixing pipe (4).

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