A multi-stage desander

Abstract

This utility model relates to the field of fluid separation equipment technology and discloses a multi-stage sand separator, which aims to solve the technical problems of cumbersome connection between sand separators and pipelines and easy clogging of the sand discharge port due to sand and gravel adhesion in existing technologies. The sand separator includes a processing mechanism, a docking assembly, and a removal mechanism. The docking assembly includes a sealing shell and a connecting pipe connected to the sand discharge port via a fixed pipe. The connecting pipe engages with a limiting block on the outer wall of the sealing shell through a groove on its inner wall, achieving tool-free and rapid docking. The docking assembly also includes a spring and a sealing ring for automatic compression and sealing after connection. The removal mechanism is located inside the sand discharge port and includes a floating block that moves along a central limiting rod and a scraper ring fixed to the floating block. This structure utilizes liquid buoyancy and its own gravity to drive the scraper ring in reciprocating motion, automatically scraping away residual sand and gravel from the inner wall of the sand discharge port. This utility model has the advantages of convenient and efficient connection operation, automatic cleaning and anti-clogging, and high equipment reliability.

Description

Technical Field

[0001] This utility model relates to the field of fluid separation equipment technology, and in particular to a multi-stage sand remover. Background Technology

[0002] Sand separators are widely used solid-liquid separation devices in industrial production, especially in oil extraction, water treatment, and mineral processing, to separate solid particles such as sand and gravel from liquids. Currently, the common hydrocyclone sand separator utilizes the principle of centrifugal force for separation; its simple structure and high separation efficiency have led to its widespread application.

[0003] However, in actual installation and maintenance, these sand separators typically need to be connected to external conveying pipelines via flanges and multiple bolts. This connection method not only requires precise alignment, but also necessitates the use of various specialized tools such as wrenches for tightening and disassembly. The operation is cumbersome and consumes a lot of manpower and time, especially in situations requiring frequent disassembly or where space is limited, where its inconvenience becomes even more pronounced.

[0004] Furthermore, during the long-term operation of the desander, the separated sand and gravel are discharged through the bottom discharge port. Because sand and gravel have a certain degree of adhesion, and the discharged liquid may not be able to completely remove all of them, some sand and gravel will adhere to the inner wall of the discharge port. Over time, this adhered sand and gravel will gradually accumulate and harden, eventually causing the cross-sectional area of ​​the discharge port to decrease or even become completely blocked. This severely affects the sand removal efficiency and the normal operation of the equipment, forcing production to be interrupted for manual unblocking and cleaning, increasing additional maintenance costs and safety risks.

[0005] Therefore, this utility model proposes a multi-stage sand remover to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of existing sand separators, such as cumbersome and time-consuming operation when connecting to external pipelines, reliance on tools, and easy blockage of the sand discharge port due to sand and gravel, this utility model aims to provide a sand separator with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a multi-stage sand remover, including: a processing mechanism, which includes a sand removal tank, which has a feed inlet, a discharge outlet and a sand discharge outlet; and a docking assembly and a removal mechanism.

[0008] The docking assembly includes a sealing shell fixed to the sand discharge port and a connecting pipe for connecting to an external pipeline. The outer wall of the sealing shell has a protruding limiting block, and the inner wall of the connecting pipe has a groove for engaging with the limiting block. The removal mechanism includes a floating block and a scraper ring connected to the floating block.

[0009] Furthermore, the docking assembly is fixedly connected to the sand discharge port of the processing mechanism through its sealing shell, and its connecting pipe is detachably sleeved on the outside of the sealing shell; the removal mechanism is axially movable inside the sand discharge port, and the outer edge of its scraper ring forms a sliding fit with the inner wall of the sand discharge port.

[0010] Preferably, the docking assembly further includes a sealing ring and a spring disposed between the sealing shell and the connecting pipe, and the connecting pipe is provided with a compression ring, which abuts against the sealing ring to compress the spring when the connecting pipe moves axially.

[0011] Preferably, the slot is constructed including a guide slot section extending axially along the connecting pipe, and a circumferential positioning slot section connected to the end of the guide slot section.

[0012] Preferably, the docking assembly further includes a fixing tube, and the sealing shell is fixedly connected to the sand discharge port through the fixing tube.

[0013] Preferably, the removal mechanism further includes a limiting rod, one end of which is fixed inside the sand discharge port, and the floating block is movably fitted onto the limiting rod.

[0014] Preferably, the wall of the limiting rod is provided with an axially extending groove, and the inner wall of the floating block is provided with a connecting block, which slides in conjunction with the groove.

[0015] Preferably, the free end of the limiting rod is provided with a limiting plate to limit the upward movement of the floating block.

[0016] Preferably, the desander further includes a support, on which the processing mechanism is mounted.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, by using a limiting rod in conjunction with a limiting plate and a sliding groove, the sliding groove in conjunction with a connecting block 44, the connecting block in conjunction with a floating block, and the floating block in conjunction with a scraper ring, the residual sand and gravel inside the sand discharge port can be removed. Compared with the existing technology, which requires manual disassembly and shutdown to clean the residue, easily leads to pipe wear and blockage, and has high maintenance costs, the limiting rod and scraper ring mechanism, with the help of liquid buoyancy and gravity, allows the floating block to slide automatically along the connecting block track of the limiting rod and drive the scraper ring to scrape off the residue on the inner wall of the sand discharge port without additional intervention. It can be integrated into the main process of liquid discharge without interrupting material transmission, improving efficiency while reducing equipment wear and control costs, and taking into account both cleanliness and practicality.

[0019] 2. In this utility model, a fixed pipe is used in conjunction with a sealing shell, a sealing shell is used in conjunction with a limiting block, a limiting block is used in conjunction with a connecting pipe, and a connecting pipe is used in conjunction with a compression ring. The compression ring compresses the sealing ring, and the sealing ring compresses the spring, thereby achieving rapid pipe connection without tools. Existing devices rely on special tools, which can increase the difficulty of connection due to tool issues. Moreover, the step-by-step operation is time-consuming and has poor applicability in outdoor narrow spaces and other scenarios. Some simple devices are also prone to loosening and leakage. However, this device, with the mechanical cooperation of the interconnected parts, can achieve the effect of sealing and connecting pipes without external tools, simply by manually sliding. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a multi-stage sand remover proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the processing mechanism of a multi-stage sand remover proposed in this utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0024] Legend:

[0025] 1. Bracket;

[0026] 2. Processing mechanism; 21. Sand removal tank; 22. Feed inlet; 23. Discharge outlet; 24. Sand discharge outlet;

[0027] 3. Connecting assembly; 31. Fixing tube; 32. Sealing shell; 33. Restricting block; 34. Spring; 35. Sealing ring; 36. Connecting tube; 37. Compression ring; 38. Slot;

[0028] 4. Removal mechanism; 41. Limiting rod; 42. Limiting plate; 43. Slide groove; 44. Connecting block; 45. Floating block; 46. Scraper ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Please refer to Figures 1 to 4This utility model provides a multi-stage sand remover, which aims to solve the technical problems of existing sand removal equipment being cumbersome and time-consuming to connect with external pipelines, and the sand discharge port 24 being easily blocked by sand and gravel residue.

[0031] like Figure 1 As shown, the sand remover includes a support 1 that serves as the foundation for the overall structure, and a processing mechanism 2 that is fixedly installed on the support 1. The processing mechanism 2 includes a sand removal tank 21 that serves as the core sand removal unit. The upper part of the sand removal tank 21 is provided with an outlet 23 for discharging the separated liquid, and its side wall is provided with an inlet 22 for conveying materials. Its conical bottom is integrally formed with a sand discharge port 24 for discharging sand and gravel.

[0032] Specifically, the sand remover also includes a docking assembly 3 for quickly connecting the sand discharge port 24 to an external pipe, and a removal mechanism 4 for scraping away residual sand and gravel from the inner wall of the sand discharge port 24.

[0033] Please refer to Figure 2 and Figure 4 The docking assembly 3 includes a sealing shell 32 fixedly connected to the sand discharge port 24 via a fixed pipe 31, and a connecting pipe 36 for fitting around the outside of the sealing shell 32. The connecting pipe 36 is used to connect to an external pipeline. A protruding limiting block 33 is fixedly provided on the outer wall of the sealing shell 32. A slot 38 for engaging with the limiting block 33 is provided on the inner wall of the connecting pipe 36. The slot 38 includes a guide groove section extending axially along the connecting pipe 36 and a circumferential locking groove section communicating with the end of the guide groove section. A sealing ring 35 and a spring 34 are coaxially arranged between the sealing shell 32 and the connecting pipe 36. An integrally formed compression ring 37 is provided at the inner end of the connecting pipe 36. When the connecting pipe 36 moves axially, the compression ring 37 abuts against and compresses the sealing ring 35. The sealing ring 35 then compresses the spring 34. The spring force released by the spring 34 achieves a tight seal after connection.

[0034] Please refer to Figure 2 and Figure 3 The removal mechanism 4 is located inside the sand discharge port 24. It includes a limiting rod 41 fixedly installed along the central axis of the sand discharge port 24 and a floating block 45 movably sleeved on the limiting rod 41. A scraping ring 46 is fixedly connected to the outer peripheral wall of the floating block 45. The outer edge of the scraping ring 46 slides against the inner wall of the sand discharge port 24. A groove 43 is provided on the rod wall of the limiting rod 41 along its axial direction. A connecting block 44 is provided on the inner wall of the floating block 45 and slides against the groove 43. The cooperation structure between the connecting block 44 and the groove 43 is used to guide the floating block 45 to perform stable axial reciprocating motion. A limiting plate 42 is fixedly connected to the free end of the limiting rod 41 away from the sand discharge port 24. The limiting plate 42 is used to limit the final position of the upward movement of the floating block 45.

[0035] As for the structure inside the sand removal tank 21 that achieves solid-liquid separation through swirling flow, it is a well-known technology in the field and will not be described in detail here.

[0036] In this embodiment, to achieve a stable and sealed quick docking, the slot 38 in the docking assembly 3 is specifically configured as an L-shaped structure including an axial guide slot and a circumferential locking slot. When the connecting pipe 36 is sleeved on the sealing shell 32, the limiting block 33 first slides along the guide slot, and then the connecting pipe 36 is rotated to make the limiting block 33 enter the locking slot, thereby achieving axial locking. At this time, the compression ring 37 compresses the sealing ring 35, and the sealing ring 35 further compresses the spring 34. After releasing, the rebound force of the spring 34 reacts to the connecting pipe 36 through the sealing ring 35 and the compression ring 37, so that the side wall of the locking slot of the slot 38 is tightly fitted with the limiting block 33 to prevent the connection from loosening.

[0037] Furthermore, to ensure that the removal mechanism 4 operates smoothly within the sand discharge port 24 without deflection or jamming, the limiting rod 41 forms a sliding guide engagement with the connecting block 44 on the inner wall of the floating block 45 through the sliding groove 43 on it, thereby ensuring that the floating block 45 and the scraper ring 46 can only move up and down along the axial direction of the limiting rod 41. The limiting plate 42 acts as a physical stop, limiting the maximum stroke of the floating block 45 under the action of liquid buoyancy, preventing it from detaching from the limiting rod 41.

[0038] As a specific connection method, the sealing shell 32 is fixed to the outer end of the sand discharge port 24 by welding or threaded connection through the fixing pipe 31, ensuring that the connection between the docking component 3 and the main processing mechanism 2 is firm and reliable. At the same time, the entire processing mechanism 2 and the docking component 3 are supported and positioned by the bracket 1, ensuring the overall stability of the equipment.

[0039] Working principle: When connecting pipes, the operator attaches the connecting pipe 36 to the external pipe and then pushes the connecting pipe 36 axially toward the sealing shell 32 fixed on the sand discharge port 24. This causes the limiting block 33 on the outer wall of the sealing shell 32 to slide into the guide groove section of the slot 38 opened on the inner wall of the connecting pipe 36. During this process, the compression ring 37 at the inner end of the connecting pipe 36 will compress the sealing ring 35, and the sealing ring 35 will then compress the spring 34 behind it. When the limiting block 33 slides to the end of the guide groove section, the connecting pipe 36 is rotated so that the limiting block 33 enters the circumferential locking groove section of the slot 38 to lock. At this time, the connecting pipe 36 can be released, and the compressed spring 34 will release its rebound force. Through the sealing ring 35 and the compression ring 37, the connecting pipe 36 is pushed in the opposite direction, so that the limiting block 33 is tightly abutted against the side wall of the locking groove section, thereby achieving a quick, tight and sealed connection without tools.

[0040] When the equipment is working, the material containing sand and gravel enters the sand removal tank 21 through the feed inlet 22. Under the action of the tank structure, a high-speed spiral flow is formed. Under the action of centrifugal force, the liquid throws the denser sand and gravel towards the inner wall of the tank. The sand and gravel sink along the wall to the bottom sand discharge port 24, while the less dense clean liquid forms an upward flow in the central area and is discharged from the top discharge port 23. When the liquid containing sand and gravel enters the sand discharge port 24, the buoyancy of the liquid causes the floating block 45 in the removal mechanism 4 to float upward along the limiting rod 41 until its top is blocked by the limiting plate 42. When this part of the liquid is drained, the floating block 45 loses buoyancy and slides down along the limiting rod 41 by its own weight. During the falling process, the scraper ring 46 fixed to the outside of the floating block 45 closely adheres to the inner wall of the sand discharge port 24, scraping away the residual sand and gravel attached to the inner wall and causing it to fall and be discharged, thereby completing an automatic cleaning and preventing the sand discharge port 24 from being blocked.

Claims

1. A multi-stage sand separator, comprising: Processing mechanism (2), the processing mechanism (2) includes a sand removal tank (21), the sand removal tank (21) is provided with a feed inlet (22), a discharge outlet (23) and a sand discharge outlet (24), characterized in that it further includes: A docking assembly (3) for quickly connecting the sand discharge port (24) to an external pipe is provided. The docking assembly (3) includes a sealing shell (32) fixed to the sand discharge port (24) and a connecting pipe (36) for fitting the external pipe and detachably connecting to the sealing shell (32). The outer wall of the sealing shell (32) is provided with at least one limiting block (33), and the inner wall of the connecting pipe (36) is provided with a groove (38) that cooperates with the limiting block (33). And a removal mechanism (4) axially movable inside the sand discharge port (24), the removal mechanism (4) including a floating block (45) and a scraper ring (46) connected to the floating block (45), the outer edge of the scraper ring (46) slidingly adhering to the inner wall of the sand discharge port (24).

2. The sand remover according to claim 1, characterized in that, The docking assembly (3) further includes a sealing ring (35) and a spring (34) disposed between the sealing shell (32) and the connecting pipe (36), and the connecting pipe (36) is provided with a compression ring (37) for squeezing the sealing ring (35) to compress the spring (34).

3. The sand remover according to claim 1 or 2, characterized in that, The slot (38) includes a guide slot section extending axially along the connecting pipe (36) and a circumferential locking slot section connected to the end of the guide slot section for holding the limiting block (33).

4. The sand remover according to claim 1, characterized in that, The docking assembly (3) also includes a fixing tube (31), and the sealing shell (32) is fixedly connected to the sand discharge port (24) through the fixing tube (31).

5. The sand remover according to claim 1, characterized in that, The removal mechanism (4) also includes a limiting rod (41) with one end fixed inside the sand discharge port (24), and the floating block (45) is movably sleeved on the limiting rod (41).

6. The sand remover according to claim 5, characterized in that, The limiting rod (41) has a groove (43) extending along its axial direction on its rod wall, and the inner wall of the floating block (45) has a connecting block (44) that slides and engages with the groove (43).

7. The sand remover according to claim 5 or 6, characterized in that, The free end of the limiting rod (41) is provided with a limiting plate (42) for limiting the upward position of the floating block (45).

8. The sand remover according to claim 1, characterized in that, It also includes a bracket (1), on which the processing mechanism (2) is mounted.

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