Horizontal sand pumping device for high-pressure water jet sand blasting

Abstract

The utility model discloses a horizontal sand pumping device for high pressure water jet sand blasting, which comprises a nozzle, a sand suction pipe, a wear-resistant pipe and a throat pipe sleeve, the wear-resistant pipe is clamped in the throat pipe sleeve, a first mixing cavity is arranged in the sand suction pipe, the nozzle and the wear-resistant pipe are respectively connected with an inlet and an outlet on two sides of the first mixing cavity, and the nozzle is connected with the wear-resistant pipe. The first mixing cavity is connected with the abrasion-resistant pipe through a positioning step assembly, and a first fastening assembly used for facilitating connection of the abrasion-resistant pipe and the first mixing cavity is arranged between the throat pipe sleeve and the sand suction pipe. According to the horizontal sand pumping device, not only is the centering precision guaranteed, but also the workload during replacement and installation is reduced, installation is convenient and fast, the throat pipe mixing cavity and the throat pipe advection cavity which are most prone to abrasion are integrally designed, overall replacement is achieved, the requirement for the machining precision of the abrasion-resistant pipe is reduced, the production cost is reduced, and the sand suction efficiency of the sand pumping device is improved.

Description

Technical Field

[0001] The utility model belongs to surface cleaning technology, in particular to a high-pressure water jet sandblasting device. Background Art

[0002] High-pressure water jet sandblasting surface cleaning technology has the advantages of fast cleaning speed, strong removal force, no dust and acid mist, clean environment, and good surface cleaning quality. With the development of technology, it has been applied to fields such as cold descaling of steel strips.

[0003] The sand extraction device is an important component for the stable operation of high-pressure water jet sand blasting, and its purpose is to achieve the recycling of steel sand. The sand extraction device has the advantages of simple structure, easy processing and manufacturing, convenient installation, and reliable operation. The disadvantage is that the mixing loss of the working fluid and the pumping fluid is very large, and the mixing chamber and throat of the working fluid and the pumping fluid are very easy to wear and need to be replaced regularly. It is necessary to consider the convenience of replacement and the centering of the pipeline. Previously, similar sand extraction devices were installed at the bottom of the box in a horizontal installation form. The mixing chamber and throat that needed to be replaced were connected to the pumping fluid sand suction pipe with an internal thread, such as referring to Chinese patents CN201702689U and CN208106850U. Although the centering problem was solved, the internal threads needed to be cleaned during installation, and no steel shots could fall on the threads. Therefore, the steel shots inside the box needed to be cleaned before installation, and the actual operation process was very complicated. Chinese patent CN107605812A uses flanges to connect the mixing chamber and throat pipe that need to be replaced with the fluid pumping sand suction pipe. Replacement is convenient, but the flange connection accuracy is low, and the centering of the throat pipe and the fluid pumping sand suction pipe cannot be guaranteed, which affects the working performance of the equipment. Utility Model Content

[0004] In order to overcome the deficiencies and defects mentioned in the above background technology and solve the above technical problems, the utility model provides a horizontal sand extraction device for high-pressure water jet sand blasting that is segmented, can be quickly disassembled, easily worn parts can be quickly replaced as a whole, and the neutrality of parts is ensured, and the two-phase flow in the mixing chamber of the sand suction tube flows more efficiently.

[0005] In order to solve the above technical problems, the technical solutions proposed by the present invention are as follows:

[0006] A horizontal sand extraction device for high-pressure water jet sand blasting comprises a nozzle, a sand suction pipe, a wear-resistant pipe and a throat sleeve, wherein the wear-resistant pipe is clamped in the throat sleeve, a first mixing chamber is provided in the sand suction pipe, the nozzle and the wear-resistant pipe are respectively connected to the inlet and outlet on both sides of the first mixing chamber, the first mixing chamber and the wear-resistant pipe are connected at their junction by a positioning step assembly, and a first fastening assembly for facilitating the connection between the wear-resistant pipe and the first mixing chamber is provided between the throat sleeve and the sand suction pipe.

[0007] In the aforementioned horizontal sand extraction device, the positioning step assembly preferably includes a protrusion located at the outlet of the first mixing chamber and a recessed portion located at the end of the wear-resistant tube for mating with the protrusion. The recessed portion at the end of the wear-resistant tube is sleeved over a protruding step at the outlet of the first mixing chamber of the sand suction tube, extending in the direction of high-speed fluid flow. The protruding step and the recessed portion of the wear-resistant tube cooperate to achieve rapid radial positioning of the wear-resistant tube and the sand suction tube, thereby ensuring accurate centering of the wear-resistant tube and the sand suction tube.

[0008] In the aforementioned horizontal sand extraction device, preferably, the first fastening assembly is a first connecting screw, and the throat sleeve and the sand suction pipe are provided with matching holes for receiving the first connecting screw. The throat sleeve and the sand suction pipe are externally connected by screws at the outlet end of the first mixing chamber. This prevents steel shot remaining in the sand suction pipe from affecting the connection between the throat sleeve and the sand suction pipe when a threaded connection is used. The screw connection also eliminates the need to clean steel shot from within the housing before installation, thereby reducing the workload during replacement and installation.

[0009] In the aforementioned horizontal sand pumping device, the wear-resistant pipe preferably includes a throat mixing chamber section and a throat advection chamber section, which are integrally formed. High-speed fluid entering through the nozzle and pumping fluid from the two-phase flow inlet mix and pass through the throat mixing chamber section, which experiences significant wear and tear. The throat pipe is extremely susceptible to wear and requires regular replacement. The present invention integrates the throat mixing chamber and throat advection chamber, which are the most susceptible to wear, into an integrated design, making them easier to replace as a whole.

[0010] In the above-mentioned horizontal sand pumping device, preferably, the middle part of the throat sleeve is provided with an inner step for clamping the wear-resistant tube, the outer wall of the wear-resistant tube is matched with an outer step, and the inner step is also provided with a second fastening component for realizing a close connection between the wear-resistant tube and the first mixing chamber. A fastening component is installed at the matching place between the outer step in the middle part of the throat sleeve and the inner step of the wear-resistant tube, and the fit between the inner concave part of the wear-resistant tube and the protrusion of the first mixing chamber in the sand suction tube is adjusted by the fastening component to realize a close connection between the wear-resistant tube and the sand suction tube. If the above-mentioned setting method is not adopted, the wear-resistant tube needs to be precisely matched with the throat sleeve so that the first fastening component can realize a close connection between the wear-resistant tube and the sand suction tube, and the processing precision requirement is high. The utility model reduces the processing precision requirement for the wear-resistant tube by adding the above-mentioned step and the second fastening component, thereby reducing the production cost.

[0011] In the above-mentioned horizontal sand extraction device, preferably, the second fastening assembly is a second fastening screw, the inner step of the locking position is matched with a hole for the second fastening screw to pass through, and the end of the second fastening screw is abutted against the outer step of the locking position. A hole is opened in the outer step in the middle of the throat sleeve in the horizontal direction of the high-speed fluid flow and the fastening screw is installed. The axial position of the inner recess of the wear-resistant tube is adjusted by adjusting the fastening screw, which facilitates achieving a tight connection between the wear-resistant tube and the sand suction tube.

[0012] In the above-mentioned horizontal sand pumping device, preferably, an oblique flow block is provided in the first mixing chamber, and the oblique flow block is provided opposite to the two-phase flow inlet on the sand suction pipe. The oblique flow block is provided with a slope for guiding the abrasive in the first mixing chamber to be better sucked into the wear-resistant pipe by negative pressure. In the first mixing chamber of the sand suction pipe, an oblique flow block is installed opposite to the two-phase flow inlet. The slope of the oblique flow block in the forward direction of the high-speed fluid can guide the abrasive entering the mixing chamber of the sand suction pipe from the two-phase flow inlet to be better sucked into the throat mixing chamber by the negative pressure formed by the high-speed fluid entering from the nozzle. This not only reduces the area of ​​negative pressure suction, but also the slope is conducive to the movement of steel shots along the direction of high-speed fluid, thereby improving the sand suction efficiency of the sand pumping device.

[0013] In the aforementioned horizontal sand extraction device, the diagonal flow block is preferably positioned and secured within the first mixing chamber via a third positioning screw. After the diagonal flow block within the first mixing chamber of the sand suction pipe is properly positioned, a hole is drilled in the bottom of the first mixing chamber perpendicular to the direction of fluid flow and a screw is installed. The screw is inserted into the diagonal flow block to position and secure it, ensuring that the diagonal flow block, the nozzle, and the sand suction pipe are in close contact with each other.

[0014] In the aforementioned horizontal sand extraction device, the diagonal flow block preferably has a central mounting hole configured to match the nozzle's profile. The nozzle end is mounted in the central mounting hole, and the nozzle is securely connected to the sand suction pipe via a fourth connecting screw. The nozzle is inserted into the central hole of the diagonal flow block, and the exterior of the nozzle is securely connected to the sand suction pipe via a connecting screw, ensuring proper alignment and tightness of the nozzle and the sand suction pipe.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The horizontal sand extraction device for high-pressure water jet sand blasting of the utility model is a segmented detachable structure. The wear-resistant tube and the sand suction tube are quickly radially positioned by a positioning step assembly. The wear-resistant tube and the sand suction tube are connected by providing a first fastening assembly, which avoids the steel shot remaining in the sand suction tube during the threaded connection affecting the installation connection between the throat sleeve and the sand suction tube. When replacing the wear-resistant tube, not only its centering accuracy is guaranteed, but also the workload during replacement and installation is reduced, and the installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1This is a schematic structural diagram of a horizontal sand extraction device for high-pressure water jet sand blasting according to the present invention.

[0019] Legend

[0020] 1. Nozzle; 2. Fourth connecting screw; 3. Sand suction pipe; 4. Throat sleeve; 5. Second fastening screw; 6. Wear-resistant tube; 7. First connecting screw; 8. Oblique flow block; 9. Third positioning screw; 10. High-speed fluid inlet; 11. Two-phase flow inlet; 12. Throat mixing chamber section; 13. Throat horizontal flow chamber section; 14. First mixing chamber. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0022] It should be noted that when an element is described as being "fixed, fixed, connected or communicated with" another element, it can be directly fixed, fixed, connected or communicated with the other element, or it can be indirectly fixed, fixed, connected or communicated with the other element through other intermediate connectors.

[0023] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0024] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0025] Example:

[0026] like Figure 1 As shown, the horizontal sand extraction device for high-pressure water jet sandblasting of this embodiment is a segmented, detachable structure, comprising: a nozzle 1, a fourth connecting screw 2, a sand suction pipe 3, a throat sleeve 4, a second fastening screw 5, a wear-resistant tube 6, a first connecting screw 7, a diagonal flow block 8, a third positioning screw 9, a high-speed fluid inlet 10, a two-phase flow inlet 11, a throat mixing chamber section 12, a throat flat flow chamber section 13, and a first mixing chamber 14. The working fluid enters through the high-speed fluid inlet 10 of the nozzle 1, passes through the first mixing chamber 14, and forms a negative pressure entrainment, sucking in the abrasive that enters the first mixing chamber 14 from the two-phase flow inlet 11. The abrasive is then mixed and enters the throat mixing chamber section 12 and the throat flat flow chamber section 13.

[0027] Specifically, in this embodiment, the wear-resistant tube 6 is clamped in the throat sleeve 4, a first mixing chamber 14 is provided in the sand suction tube 3, the nozzle 1 and the wear-resistant tube 6 are respectively connected to the inlet and outlet of the first mixing chamber 14 on both sides, and the first mixing chamber 14 and the wear-resistant tube 6 are connected at their junction by a positioning step assembly. The positioning step assembly includes a protrusion located at the outlet of the first mixing chamber 14 and an inner recess located at the end of the wear-resistant tube 6 for mating with the protrusion. A first fastening assembly is provided between the throat sleeve 4 and the sand suction tube 3 to facilitate the connection between the wear-resistant tube 6 and the first mixing chamber 14. The first fastening assembly is a first connecting screw 7. The throat sleeve 4 and the sand suction tube 3 are matched with holes for installing the first connecting screw 7. In this embodiment, the positioning step assembly can achieve rapid radial positioning of the wear-resistant tube 6 and the sand suction tube 3, and the first fastening assembly can quickly and conveniently achieve the wear-resistant tube 6 and the sand suction tube 3 installation.

[0028] In other embodiments, the positioning step assembly may also adopt other structures, such as a protrusion provided at the end of the wear-resistant tube 6 and a recessed portion provided at the outlet of the first mixing chamber 14 .

[0029] In this embodiment, the wear-resistant pipe 6 includes a throat mixing chamber section 12 and a throat advection chamber section 13. The throat mixing chamber section 12 and the throat advection chamber section 13 are an integrated structure, so as to facilitate overall replacement.

[0030] In this embodiment, an inner locking step is provided in the middle of the throat sleeve 4 for securing the wear-resistant tube 6. A matching outer locking step is provided on the outer wall of the wear-resistant tube 6. A second fastening assembly is also provided on the inner locking step for tightly connecting the wear-resistant tube 6 to the first mixing chamber 14. The second fastening assembly is a second fastening screw 5. The inner locking step is matched with a hole for passing the second fastening screw 5, and the end of the second fastening screw 5 abuts against the outer locking step.

[0031] In this embodiment, a diagonal flow block 8 is installed within the first mixing chamber 14. This block is located opposite the two-phase flow inlet 11 on the sand suction pipe 3. This block is provided with a slope to guide the abrasive in the first mixing chamber 14 into the wear-resistant pipe 6 through negative pressure. The diagonal flow block 8 is positioned and secured within the first mixing chamber 14 by a third set screw 9.

[0032] In this embodiment, a central mounting hole for matching the shape of the nozzle 1 is provided on the oblique flow block 8 , the end of the nozzle 1 is installed in the central mounting hole, and the nozzle 1 is fixed to the sand suction pipe 3 via a fourth connecting screw 2 .

[0033] In this embodiment, the rear portion of the throat sleeve 4 along the direction of high-speed fluid flow is connected to other pipes by screws.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A horizontal sand extraction device for high-pressure water jet sand blasting, comprising a nozzle (1), a sand suction pipe (3), a wear-resistant pipe (6) and a throat sleeve (4), wherein the wear-resistant pipe (6) is clamped in the throat sleeve (4), a first mixing chamber (14) is provided in the sand suction pipe (3), the nozzle (1) and the wear-resistant pipe (6) are respectively connected to the inlet and outlet on both sides of the first mixing chamber (14), and characterized in that: The first mixing chamber (14) and the wear-resistant pipe (6) are connected at their junction via a positioning step assembly, and a first fastening assembly for facilitating the connection between the wear-resistant pipe (6) and the first mixing chamber (14) is provided between the throat sleeve (4) and the sand suction pipe (3).

2. The horizontal sand pumping device according to claim 1, characterized in that: The positioning step assembly comprises a protrusion located at the outlet of the first mixing chamber (14) and an inner recess located at the end of the wear-resistant tube (6) for cooperating with the protrusion.

3. The horizontal sand pumping device according to claim 1, characterized in that: The first fastening component is a first connecting screw (7), and the throat sleeve (4) and the sand suction pipe (3) are matched with holes for installing the first connecting screw (7).

4. The horizontal sand pumping device according to claim 1, characterized in that: The wear-resistant pipe (6) comprises a throat mixing chamber section (12) and a throat advection chamber section (13), and the throat mixing chamber section (12) and the throat advection chamber section (13) are an integrated structure.

5. The horizontal sand pumping device according to claim 1, characterized in that: The throat sleeve (4) is provided with an inner locking step in the middle for locking the wear-resistant tube (6), the outer wall of the wear-resistant tube (6) is matched with an outer locking step, and a second fastening component for achieving a tight connection between the wear-resistant tube (6) and the first mixing chamber (14) is also provided at the inner locking step.

6. The horizontal sand pumping device according to claim 5, characterized in that: The second fastening component is a second fastening screw (5), and a hole for the second fastening screw (5) to pass through is matched on the inner step of the locking position, and the end of the second fastening screw (5) is abutted on the outer step of the locking position.

7. The horizontal sand pumping device according to any one of claims 1 to 6, characterized in that: An oblique flow block (8) is provided in the first mixing chamber (14), and the oblique flow block (8) is arranged opposite to the two-phase flow inlet (11) on the sand suction pipe (3). The oblique flow block (8) is provided with a slope for guiding the abrasive in the first mixing chamber (14) to be better sucked into the wear-resistant pipe (6) by negative pressure.

8. The horizontal sand pumping device according to claim 7, characterized in that: The oblique flow block (8) is positioned and fixed in the first mixing chamber (14) by a third positioning screw (9).

9. The horizontal sand pumping device according to claim 7, characterized in that: The oblique flow block (8) is provided with a central mounting hole for matching the shape of the nozzle (1); the end of the nozzle (1) is installed in the central mounting hole, and the nozzle (1) is fixedly connected to the sand suction pipe (3) via a fourth connecting screw (2).

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