Abrasion and impact resistant pressure relief device

Abstract

The utility model relates to a kind of wear-resistant impact-resistant pressure reducing device, belong to pipeline flow control technical field.This device includes square box (1) and orifice plate (8), the square box (1) is the box structure of upper end opening, and the both sides of square box (1) are provided with connecting through-hole, orifice plate (8) is inserted in square box (1) along the opening of square box (1) upper end, and the upper end of square box (1) is provided with detachable cover plate (2).This device can freely adjust orifice plate (8) according to flow requirement, realize pressure reduction and quick replacement, reduce routine overhaul time, improve the operation rate of equipment.Solve the problem that existing valve is difficult to install orifice plate (8) flow limiting due to large pipe diameter and under open-air condition.

Description

Technical Field

[0001] This utility model relates to a wear-resistant and impact-resistant pressure-reducing device, belonging to the field of pipeline flow control technology. Background Technology

[0002] In a certain mineral processing plant, vanadium-titanium magnetite tailings slurry is transported to the tailings dam slurry pool using a diaphragm pump. The dam is constructed using the hydrocyclone centerline dam construction method. The tailings slurry flows by gravity from the slurry pool to the tailings dam hydrocyclone for classification. The sediment is stored in the coarse sand zone, and the overflow is stored in the fine sand zone.

[0003] During daily production, due to the high flow rate, high pressure, and coarse particle size of the slurry, the slurry severely erodes the pipes and valves, making it impossible to accurately control the hydrocyclone pressure. The DN450mm valve at the front end of the hydrocyclone is prone to wear and leakage, causing the six downstream hydrocyclones to malfunction. Furthermore, this valve has a large diameter, is heavy, and its open-air location makes replacement complex. Because the concentrator operates on an assembly line, a problem in any part of the slurry supply chain necessitates an interruption of ore delivery, thus affecting the entire concentrator's output. Utility Model Content

[0004] The technical problem to be solved by this utility model is that it is difficult to install orifice plates to limit the flow of existing valves due to their large pipe diameter and outdoor conditions.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a wear-resistant and impact-resistant pressure-reducing device, including a square box and a perforated plate. The square box is a box structure with an opening at the top, and connecting through holes are provided on both sides of the square box. The perforated plate is inserted into the square box along the opening at the top of the square box, and a detachable cover plate is provided at the top of the square box.

[0006] In the aforementioned device, the square box is provided with slides on the inner walls of the perforated plate on both radial sides, and the outer edge of the perforated plate is inserted into the slides.

[0007] In the aforementioned device, the inner wall of the square box and the side wall of the perforated plate are coated with wear-resistant material.

[0008] The orifice plate in the above-mentioned device is provided with lifting lugs on its outer wall.

[0009] Furthermore, the lifting lugs in the above-mentioned device are two and spaced apart.

[0010] Furthermore, the central angle corresponding to the arc between the lugs in the above-mentioned device is 60° to 70°.

[0011] In the aforementioned device, a sealing gasket is provided between the upper end of the square box and the cover plate.

[0012] In the above-mentioned device, a sealing gasket is provided on the back side of the orifice plate.

[0013] In the aforementioned device, short connectors with flanges are welded to the connecting through holes on both sides of the square box.

[0014] In the aforementioned device, the square box and the cover plate are connected in a sealed manner by screws.

[0015] The beneficial effects of this utility model are: the device has a simple structure, low manufacturing cost, and long service life. It can freely adjust the ore flow rate according to the flow rate change, reduce the damage to the DN 450mm valve, ensure the working efficiency and working time of the downstream equipment hydrocyclone, reduce the frequency of accident maintenance, and can replace the pressure reducing valve in certain working conditions. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the square box of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of this utility model after the short pipe is installed.

[0019] Figure 4 This utility model Figure 3 A schematic diagram of the left-side view structure.

[0020] Figure 5 This utility model Figure 4 A schematic diagram of the half-section structure.

[0021] The markings in the diagram are as follows: 1 is a square box, 11 is a threaded hole, 2 is a cover plate, 3 is a perforated plate, 31 is a lifting lug, 4 is a sealing gasket, 5 is a slide, 6 is a screw, 7 is a sealing gasket, and 8 is a shorting joint. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 5The wear-resistant and impact-resistant pressure-reducing device of this utility model includes a square box 1 and an orifice plate 3. The square box 1 is a box structure with an open top, and connecting through holes are provided on both sides of the square box 1. The orifice plate 3 is inserted into the square box 1 through the opening at the top. A detachable cover plate 2 is provided at the top of the square box 1. Those skilled in the art will understand that the main body of this device is the square box 1. In practice, the square box 1 needs to be pre-installed on the existing DN450mm valve upstream pipeline. Since the square box 1 is a box structure with an open top, it is preferable to provide through holes on the two opposite side walls for easy connection to the pipeline. A 702×656×30mm square box 1 can be made by welding low-alloy steel Q345B with a δ=20mm diameter. The orifice plate 3 is annular, and its inner diameter can be adjusted appropriately according to the actual flow restriction needs. The outer diameter of the orifice plate 3 should correspond to the inner diameter of the square box 1, so that the orifice plate 3 is perpendicular to the pipeline axis. Since the upper end of the square box 1 is detachably equipped with a cover plate 2, this structural setting allows the inner diameter of the orifice plate 3 to be adjusted according to the needs of flow control, ensuring the normal operation of the downstream equipment DN450mm valve and reducing wear.

[0024] Preferably, in the above-described device, the inner walls of the square box 1 located on both radial sides of the orifice plate 3 are provided with slide rails 5, and the outer edge of the orifice plate 3 is inserted into the slide rails 5. Those skilled in the art will understand that, in order to ensure that the orifice plate 3 is perpendicular to the pipe axis, this device further provides slide rails 5 on the inner walls of the square box 1 located on both radial sides of the orifice plate 3, effectively inserting the outer edge of the orifice plate 3 into the slide rails 5, and fixing the position of the orifice plate 3 by limiting the movement of the slide rails 5.

[0025] Preferably, the inner wall of the square box 1 and the side wall of the perforated plate 3 in the above-described device are coated with a wear-resistant material. Those skilled in the art will understand that, in order to reduce wear and extend service life, this device further coats the inner wall of the square box 1 and the side wall of the perforated plate 3 with a wear-resistant material to reduce wear.

[0026] Preferably, the outer wall of the orifice plate 3 in the above-mentioned device is provided with lifting lugs 31. Those skilled in the art will understand that, due to the large overall pipe diameter, the orifice plate 3 is quite heavy. Therefore, to facilitate the lifting of the orifice plate 3, this device preferably provides lifting lugs 31 on the outer wall of the orifice plate 3.

[0027] Preferably, the lifting lugs 31 in the above-described device are two and spaced apart. Those skilled in the art will understand that, to avoid displacement during lifting, this device preferably has two lifting lugs 31 spaced apart, increasing the number of lifting stress points and ensuring lifting safety.

[0028] Preferably, the central angle corresponding to the arc between the lifting lugs 31 in the above-mentioned device is 60° to 70°. Those skilled in the art will understand that, for ease of hoisting, this device further limits the angle between the two lifting lugs 31, that is, the central angle corresponding to the arc between the lifting lugs 31 is 60° to 70°.

[0029] Preferably, a sealing gasket 7 is provided between the upper end of the square box 1 and the cover plate 2 in the above-mentioned device. Those skilled in the art will understand that, in order to ensure sealing, the sealing gasket 7 is preferably provided between the upper end of the square box 1 and the cover plate 2, and a rubber gasket or a PTFE gasket can be used in practice.

[0030] Preferably, a sealing gasket 4 is provided on the back side of the orifice plate 3 in the above-described device. Those skilled in the art will understand that, in order to ensure a tight fit between the orifice plate 3 and the slide rail 5, the device preferably provides a sealing gasket 4 on the back side of the orifice plate 3. Furthermore, placing the sealing gasket 4 on the back side can also reduce wear.

[0031] Preferably, in the above-described device, short connectors 8 with flanges are welded to the connecting through holes on both sides of the square box 1. Those skilled in the art will understand that, for the purpose of installing and replacing the square box 1, this device preferably has short connectors 8 with flanges welded to the connecting through holes on both sides of the square box 1.

[0032] Preferably, in the above-described device, the square box 1 and the cover plate 2 are sealed together by a screw 6. Those skilled in the art will understand that, for ease of assembly and disassembly of the cover plate 2 and the square box 1, this device preferably uses a screw 6 to seal the connection between the square box 1 and the cover plate 2. More preferably, a suitable elongated square hole plate with threaded holes 11 is provided at the upper end of the square box 1, and corresponding through holes are drilled on the cover plate 2 so that the threaded end of the screw passes through the cover plate and is threadedly connected to the threaded hole, thus achieving the connection between the square box 1 and the cover plate 2.

Claims

1. A wear-resistant and impact-resistant pressure-reducing device, characterized in that: It includes a square box (1) and a perforated plate (3). The square box (1) is a box structure with an opening at the top, and connecting through holes are provided on both sides of the square box (1). The perforated plate (3) is inserted into the square box (1) along the opening at the top of the square box (1). A detachable cover plate (2) is provided at the top of the square box (1).

2. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: The square box (1) is provided with slides (5) on the inner walls on both radial sides of the perforated plate (3), and the outer edge of the perforated plate (3) is inserted into the slides (5).

3. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: The inner wall of the square box (1) and the side wall of the perforated plate (3) are coated with wear-resistant material.

4. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: The outer wall of the perforated plate (3) is provided with a lifting lug (31).

5. The wear-resistant and impact-resistant pressure-reducing device according to claim 4, characterized in that: The lugs (31) are two in number and spaced apart.

6. The wear-resistant and impact-resistant pressure-reducing device according to claim 5, characterized in that: The central angle corresponding to the arc between the lugs (31) is 60° to 70°.

7. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: A sealing gasket (7) is provided between the upper end of the box (1) and the cover plate (2).

8. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: A sealing gasket (4) is provided on the back side of the orifice plate (3).

9. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: The square box (1) has flanged short connectors (8) welded to the connecting through holes on both sides.

10. The wear-resistant and impact-resistant pressure-reducing device according to claim 1, characterized in that: The square box (1) and the cover plate (2) are sealed together by screws (6).

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