Ground penetrating structure jet pump external end and mounting structure thereof

Abstract

The utility model discloses an external end head of a ground penetrating structure jet pump and an installation structure of the external end head. The end head comprises a top cover, a pressing structure, a flange, a base and a base plate. A base placement through hole is formed in the base plate in the direction perpendicular to the base plate plane; the base is embedded in the base placement through hole; the axis position of the base is through to form a pump core mounting channel, the lower portion of the pump core mounting channel extends outwards to form a pump shell connecting notch, and the top face of the base is concaved downwards around the pump core mounting channel to form a flange mounting concave face. The lower part of the flange is mounted in the flange mounting concave surface; the top cover is detachably connected with the base; and the pressing structure is pressed between the top cover and the pump core. According to the external end head of the jet pump with the through-ground structure and the mounting structure of the external end head, the problems of correct mounting of the designed jet pump with the through-ground structure and maintenance of nozzle abrasion and throat pipe blockage in a post-treatment radioactive feed liquid conveying process are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spent fuel post-processing radioactive material transfer, in particular to an external end head of a ground-penetrating ejector pump and a mounting structure thereof. Background Art

[0002] Ejector pumps are a type of equipment commonly used in reprocessing plants to transfer radioactive liquids. They are suitable for aqueous solutions with less stringent dilution and flow requirements, and can also transport media containing a certain amount of solid particles. As a static power transmission device with no moving parts in contact with the radioactive liquid, ejector pumps sacrifice energy efficiency and operational flexibility to ensure operational safety. Their long-term, stable operation without maintenance is the key and fundamental reason for their widespread use.

[0003] Long-term operating experience in domestic reprocessing facilities has shown that, due to the limitations of their operating mechanism and structural configuration, a typical ejector pump exhibits several issues in practice: First, the pump's suction pressure falls below the saturated vapor pressure of the ejected liquid, causing cavitation and nozzle damage, rendering pumping impossible. Second, long-term friction from high-temperature, high-pressure, and high-velocity working media, coupled with nozzle wear in highly acidic environments, can lead to decreased or even complete pump performance loss. Third, crystallization of the liquid or high solids content can easily cause crystallization and blockage in the throat and other pipe openings. These issues force process interruptions, often requiring direct manual intervention, which often has limited effectiveness. These issues not only severely impact the continuous, stable, and safe operation of the process system but also contribute significantly to personnel costs, negatively impacting plant operating rates and equipment reliability.

[0004] Figure 1 Figure 1 is a schematic diagram of the structure of a typical existing jet pump, in which the working medium 15 is accelerated in the nozzle 13 to form a high-speed jet. The increased velocity and adiabatically expanded form a low negative pressure, which draws in the jet liquid 16 and continuously mixes it to form a uniform mixed liquid 17. The mixed liquid 17 generates a shock wave in the throat 14 for further mixing and energy exchange, after which it is decelerated and pressurized to a certain back pressure before being ejected from the jet pump.

[0005] Although the domestic industry has conducted a large amount of basic scientific and engineering application research in the field of ejector pumps and related technologies by improving material strength and wear resistance and changing operating conditions, the above-mentioned problems have not yet been effectively resolved and are becoming increasingly prominent despite the active and orderly advancement of major post-processing plant projects in my country. In addition, judging from the current status of the operation and maintenance of through-the-ground pump and valve process equipment in the domestic post-processing field, it is common to install and repair equipment directly on the concrete floor of the workshop without a dedicated external installation surface. This may result in the inability or difficulty of docking the maintenance container with the equipment due to insufficient ground flatness, and the failure of radioactive shielding or gas negative pressure sealing during the maintenance process. These bring great challenges and uncertainties to the application and maintenance of related equipment.

[0006] The working condition of reprocessing equipment is not only determined by operating conditions and operating conditions, but also by its good design. To address the maintenance issues of ejector pumps, which are prone to nozzle wear and throat blockage during certain reprocessing radioactive liquid transfer processes, and the lack of dedicated mounting surfaces for existing through-the-ground pump and valve equipment, a novel through-the-ground ejector pump with a removable nozzle was designed based on the typical ejector pump, with the goal of optimizing its structure. The external end of the through-the-ground ejector pump, located in the workshop, is an essential component of the pump and includes a top cover, clamping mechanism, flange, base, and backing plate. These components and structures are crucial for ensuring functional and operational safety. Utility Model Content

[0007] In response to the above-mentioned deficiencies in the existing technology, the present invention aims to provide an external end head of a through-the-ground structure ejector pump and its mounting structure, which solves the problems of correct installation of the designed through-the-ground structure ejector pump and maintenance of nozzle wear and throat blockage during the post-processing radioactive liquid transportation process.

[0008] In order to achieve the above-mentioned purpose, the utility model provides an external end head of a through-ground structure injection pump, comprising a top cover, a clamping structure, a flange, a base and a pad; the pad forms a base placement through hole in a direction perpendicular to the plane of the pad; the base is embedded in the base placement through hole, and the top surface of the base is flush with the top surface of the pad; the axial position of the base is passed through to form a pump core installation channel, the lower part of the pump core installation channel expands outward to form a pump casing connection notch, and the top surface of the base is concave around the pump core installation channel to form a flange installation concave surface; the lower part of the flange is installed in the flange installation concave surface; the top cover and the base are detachably connected; the flange is welded to the tail end of the pump core, the pump core is inserted into the pump core installation channel, and the clamping structure is pressed between the top cover and the pump core.

[0009] As an embodiment, the pump core includes a pump core base and several process pipe openings with nozzles, and the end of the pump core base is contracted to form a pump core convex tail; a top cover center hole is opened on the top of the top cover, and the inner diameter of the top cover center hole matches the outer diameter of the pump core convex tail.

[0010] As an embodiment, the bottom of the top cover extends outward to form a top cover plate, and the top cover plate forms a plurality of T-shaped threaded through holes; the top surface edge of the base forms a plurality of threaded holes corresponding to the T-shaped threaded through holes; the top cover and the base are fixed by screwing a plurality of hexagon socket bolts passing through the T-shaped threaded through holes and the threaded holes.

[0011] As an embodiment, the clamping structure includes a metal expansion bellows and an annular spring; the annular spring is arranged in the metal expansion bellows, and the two ends of the annular spring are connected to the two ends of the metal expansion bellows; the annular spring is sleeved on the outside of the pump core convex tail and pressed between the top cover and the pump core base.

[0012] As an embodiment, the flange includes a flange plate and a thin-walled flange formed on the top surface of the flange plate; the flange plate and the thin-walled flange are coaxially connected to form a pump core connecting hole, and the pump core is welded in the pump core connecting hole; the flange plate is arranged in the flange mounting concave surface and the top surface of the flange plate is flush with the top surface of the base; the top surface of the thin-walled flange is flush with the convex tail surface of the pump core; the inner wall of the top cover is tightly fitted with the outer wall of the thin-walled flange, and the bottom surface of the top cover plate is tightly fitted with the top surface of the flange plate and the top surface of the base; the flange, the base and the top cover are tightly matched to form a labyrinth sealing structure.

[0013] As an embodiment, the outer wall of the thin-walled flange forms a dedicated thread.

[0014] As an embodiment, an eccentric positioning mechanism is formed at the bottom of the flange; a positioning hole corresponding to the eccentric positioning mechanism is formed on the flange mounting concave surface; and the eccentric positioning mechanism and the positioning hole are in a trace interference fit.

[0015] As an embodiment, the base includes a base plate and a thick-walled flange formed on the bottom surface of the base plate; the base plate and the thick-walled flange are coaxially connected to form the pump core installation channel; the top surface of the base plate is concave around the pump core installation channel to form the flange installation concave surface; the inner wall of the thick-walled flange expands outward to form the pump casing connection groove.

[0016] As an embodiment, the top surface of the pad fits the base contour and penetrates downward to form the base placement hole consistent with the base shape; the base is arranged in the base placement hole, and the top surface of the base plate is flush with the top surface of the pad.

[0017] The utility model discloses a mounting structure for an external end head of a through-the-ground structure ejection pump, comprising: an external end head of a through-the-ground structure ejection pump according to the utility model, a mounting floor or wall, a pump casing and the pump core; the pad is arranged parallel to or obliquely with the mounting floor or wall and is nested and cast in the mounting floor or wall; the mounting floor or wall is a mounting floor or a mounting wall; when the pad is arranged horizontally on the mounting floor, the top surface of the pad is flush with the first side surface of the mounting floor; when the pad is arranged obliquely on the mounting wall, the top surface of the pad is flush with the first side surface of the mounting wall An angle of 12° upwards; the installation floor or wall forms a passage that cooperates with the base placement through-hole; the base portion passes through the base placement through-hole and is cast into the passage, and the bottom surface of the base is flush with the second side surface of the installation floor or wall, and the second side surface is opposite to the first side surface; the pump casing is coaxially welded to the pump casing connection groove of the base; the flange is coaxially welded and sleeved on the outer periphery of the tail end of the pump core, the pump core is passed through the pump core installation channel and positioned and installed in the pump casing, and the pump casing is coaxial with the pump core installation channel and has the same inner diameter.

[0018] The utility model adopts the above technical solution, so that it has the following beneficial effects:

[0019] The pad can ensure the accurate and rapid positioning of the maintenance container during maintenance and place tools and disassembled related parts; the base can absorb the expansion stress transmitted by the expansion of the pump casing that may be caused during the operation of the ejector pump, thereby eliminating the possible vibration of the pump core when the ejector pump is working; the inner wall of the flange is nested and welded with the pump core, and the correct installation of the pump core is ensured by the trace interference fit of the eccentric positioning mechanism and the positioning hole. The outer wall of the thin-walled flange forms a special thread for installing the grasping component during maintenance, thereby cooperating with the maintenance container to complete the grasping of the pump core; the clamping structure can apply pressure and compensate for the thermal expansion of the metal seal of the pump core during the operation of the ejector pump, and offset the pump core movement that may be caused during the operation; the top cover mainly plays the role of tightening, pressing and sealing. The center hole of the top cover is used to avoid the pump core protrusion passing through the pump core, so as to check the reserved pump core number, apply pressure to the clamping structure and limit the pump core. In addition, the following beneficial effects are also included:

[0020] 1. Through reasonable functional design, the external end head can make the designed ejector pump fully possess and play its complete functions while making up for the shortcomings, greatly improving the scope and flexibility of application. It can be installed vertically or horizontally on the concrete floor and wall between the workshop and the hot room according to process requirements. It is suitable for the reliable transportation of alkaline waste liquid concentrate, high-level waste liquid concentrate, slag water suspension and other radioactive liquids that are easy to damage the nozzle and cause blockage.

[0021] 2. Through adequate safety design, the external end head enables the designed ejector pump to always create and maintain a negative pressure gradient internally during operation and maintenance, and has the seismic resistance to avoid unacceptable radioactive release and damage to the sealing barrier during earthquake events.

[0022] 3. Through standardized and modular structural design, the external end can make the nozzle of the designed priming pump be safely and quickly extracted and replaced through indirect maintenance methods, and can approach and clear the blocked throat through a visual robot, thus structurally solving the maintenance problem after failure or malfunction.

[0023] 4. Through effective error-proofing design, the flange can be directly welded to the pump core during the manufacturing stage. The eccentric positioning mechanism realizes the correct installation of the nozzle in the pump housing and the precise alignment of each process nozzle of the pump core with the corresponding public flow nozzle. At the same time, the pad can ensure the correct, fast and easy installation and positioning of the inspection container during the maintenance process of the designed ejector pump.

[0024] 5. Through reasonable material selection, the entire structure is made of 304 stainless steel, which has good corrosion resistance, mechanical strength and expected life, and meets the basic requirements of post-processing process operation and maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only 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.

[0026] Figure 1 This is a schematic diagram of the structure of a typical existing ejector pump;

[0027] Figure 2 A perspective view of the internal structure of the outer end of the through-the-ground ejector pump according to an embodiment of the present application;

[0028] Figure 3 This is an appearance diagram of the external end of the ground-penetrating structure ejector pump according to an embodiment of the present application;

[0029] Figure 4A three-dimensional diagram of the outer end of the ground-penetrating ejector pump according to an embodiment of the present application;

[0030] Figure 5 This is an exploded view of the outer end of the ground-penetrating structure ejector pump according to an embodiment of the present application;

[0031] Figure 6 This is a schematic diagram of the external end installation structure of the through-the-ground structure ejector pump according to an embodiment of the present application.

[0032] Description of Figure Numbers:

[0033] 1-top cover;

[0034] 1'-center hole of top cover;

[0035] 1"-T-type threaded through hole;

[0036] 1”’-barcode and encoding;

[0037] 2-Compression structure;

[0038] 3-flange;

[0039] 3'-special thread;

[0040] 3"-eccentric positioning mechanism;

[0041] 4- Base;

[0042] 4'-threaded hole;

[0043] 4”-positioning hole;

[0044] 5- pad;

[0045] 6-Hexagon socket bolts;

[0046] 7-Pump core installation channel;

[0047] 8-Workshop;

[0048] 9- Floor between the workshop and the hot room;

[0049] 10-hot chamber;

[0050] 11- pump casing;

[0051] 12- pump core;

[0052] 13-nozzle;

[0053] 14-throat;

[0054] 15-working medium;

[0055] 16-Injection material liquid;

[0056] 17-Mixed liquid. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0058] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific position, to be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "connected" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, or communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] Embodiment 1

[0061] Please refer to Figures 2 to 6 The utility model discloses an external end of ground penetrating structure injection pump, including top 1, compaction structure 2, flange 3, base 4 and backing plate 5, the backing plate 5 forms a base installation through -hole along the direction perpendicular to the backing plate 5 plane, the base 4 is embedded in the base installation through -hole, the top surface of base 4 is flush with the top surface of backing plate 5, the axial position of base 4 is formed with a pump core installation channel 7, the lower part of pump core installation channel 7 expands to form a pump shell connecting notch, the top surface of base 4 is concave around the pump core installation channel 7 and forms a flange installation concave surface, the lower part of flange 3 is installed in the flange installation concave surface, the top 1 is detachably connected with the base 4, the flange 3 is welded on the tail end of pump core 12, the pump core 12 is arranged in the pump core installation channel 7, and the compaction structure 2 is arranged between the top 1 and the pump core 12.

[0062] The bottom of the top cover 1 extends outward to form a top cover plate, and the top cover plate forms a plurality of T-shaped threaded through holes 1"; the top surface edge of the base 4 forms a plurality of threaded holes 4' corresponding to the T-shaped threaded through holes 1"; the top cover 1 and the base 4 are screwed and fixed by a plurality of hexagon socket bolts 6 passing through the T-shaped threaded through holes 1" and the threaded holes 4'.

[0063] In this embodiment, the top cover 1 is tightly connected to the base 4 using customized hexagon socket bolts 6 through T-shaped threaded through holes 1" and threaded holes 4', primarily serving the purpose of tightening, pressing, and sealing. The barcode and code 1"' on the top surface of the top cover 1 are unique, determined and laser-engraved during the manufacture of the ejector pump, and are used for equipment management and information retrieval throughout the project lifecycle.

[0064] The flange 3 includes a flange plate and a thin-walled flange formed on the top surface of the flange plate; the flange plate and the thin-walled flange are coaxially connected to form a pump core connecting hole, and the pump core 12 is welded in the pump core connecting hole; the flange plate is arranged in the flange mounting concave surface and the top surface of the flange plate is flush with the top surface of the base 4; the top surface of the thin-walled flange is flush with the surface of the pump core convex tail platform; the inner wall of the top cover 1 is tightly fitted with the outer wall of the thin-walled flange, and the bottom surface of the top cover plate is tightly fitted with the top surface of the flange plate and the top surface of the base 4; the flange 3, the base 4 and the top cover 1 are tightly matched to form a labyrinth sealing structure.

[0065] An eccentric positioning mechanism 3" is formed at the bottom of the flange; a positioning hole 4" corresponding to the eccentric positioning mechanism 3" is formed on the flange mounting concave surface; the eccentric positioning mechanism 3" and the positioning hole 4" are in a trace interference fit.

[0066] In this embodiment, the inner wall of the flange 3 is nested and welded to the pump core 12. The eccentric positioning mechanism 3" at the bottom of the flange 3 precisely matches the positioning hole 4" of the base 4 to ensure correct installation of the nozzle. The upper thin-walled flange end face of the flange 3 is flush with the constricted end face of the pump core 12 to facilitate the installation of the clamping structure 2. The lower flange plate can be tightly installed in the flange mounting concave surface of the base 4 and closely cooperates with it to form a labyrinth seal structure, preventing the escape of radioactive gaseous substances in the pump casing 11 and thus maintaining a negative pressure gradient.

[0067] The base 4 includes a base plate and a thick-walled flange formed on the bottom surface of the base plate; the base plate and the thick-walled flange are connected to form the pump core installation channel 7; the top surface of the base plate is recessed on the periphery of the pump core installation channel 7 to form the flange installation concave surface; the inner wall of the thick-walled flange expands outward to form the pump casing connection groove.

[0068] The top surface of the pad 5 fits the contour of the base 4 and penetrates downward to form the base placement through hole consistent with the shape of the base 4; the base 4 is arranged in the base placement through hole, and the top surface of the base plate is flush with the top surface of the pad 5.

[0069] In this embodiment, the base 4 partially passes through the base mounting hole and is cast into the concrete structure of the floor 9 between the workroom and the hot chamber. Its thickness is uniform and its top and bottom are flush with the concrete structure, ensuring a secure connection with the backing plate 5, the floor 9 between the workroom and the hot chamber, and the pump casing 11, and serving as a mounting base for other structural components. The upper base plate of the base 4 nests within the base mounting hole of the backing plate 5, while the lower thick-walled flange coaxially nests through the pump casing connection notch and is welded to the pump casing 11 located within the hot chamber 10. The double-layered pump casing 11 effectively prevents corrosion and compensates for the expansion of the ejector pump during operation. The base 4 effectively absorbs the transmitted expansion stress, eliminating potential vibration of the pump core 12 during operation.

[0070] The pad 5 is located in the workshop 8, and the upper end surface is a flat and smooth horizontal surface. It is integrally nested and cast in the floor 9 between the workshop and the hot chamber and is flush with it, which can ensure the accurate and rapid positioning of the maintenance container during the maintenance process and the placement of tools and removed related parts.

[0071] The utility model discloses a mounting structure for an external end of a through-the-ground structure ejection pump, comprising: the external end of the through-the-ground structure ejection pump described in this embodiment, a mounting floor or wall, a pump casing 11, and the pump core 12; the pad 5 is arranged parallel to the mounting floor or wall or is tilted and nested and cast in the mounting floor or wall; the mounting floor or wall is a mounting floor or a mounting wall; when the pad 5 is arranged horizontally on the mounting floor, the top surface of the pad 5 is flush with the first side surface of the mounting floor; when the pad 5 is tilted on the mounting wall, the top surface of the pad 5 is upward 12 with the first side surface of the mounting wall. ° angle; the installation floor or wall forms a passage that cooperates with the base placement through hole; the base 4 partially passes through the base placement through hole and is cast into the passage, the bottom surface of the base 4 is flush with the second side surface of the installation floor or wall, and the second side surface is opposite to the first side surface; the pump casing 11 is coaxially welded to the pump casing connection groove of the base 4; the flange 3 is coaxially welded and sleeved on the outer periphery of the tail end of the pump core 12, the pump core 12 is passed through the pump core installation channel 7 and is positioned and installed in the pump casing 11, and the pump casing 11 is coaxial with the pump core installation channel 7 and has the same inner diameter.

[0072] In this embodiment, the installation floor or wall is the floor 9 between the workroom and the hot room. In other embodiments, the installation floor or wall may also be a wall surface.

[0073] Example 2

[0074] The second embodiment of the present invention is an external end cap for a through-the-ground ejection pump. Its structure is essentially the same as that of the first embodiment, except that the pump core 12 comprises a base body and a plurality of process nozzles with nozzles. The end of the base body is contracted to form a pump core protrusion. The top of the top cover 1 defines a center hole 1', the inner diameter of which matches the outer diameter of the pump core protrusion. The center hole 1' allows the pump core protrusion 12 to pass through, making it easier to check the pump core 12 serial number, apply pressure to the compression structure 2, and limit the pump core 12.

[0075] The second embodiment of the present invention is a mounting structure for an external end head of a through-the-ground structure ejector pump, and its structure is basically the same as that of the first embodiment, except that it includes: the external end head of the through-the-ground structure ejector pump described in this embodiment.

[0076] Example 3

[0077] The external end head of a through-the-ground structure injection pump of embodiment 3 of the present invention has a structure basically the same as that of embodiment 2, except that the clamping structure 2 includes a metal expansion bellows and an annular spring; the annular spring is arranged in the metal expansion bellows, and the two ends of the annular spring are connected to the two ends of the metal expansion bellows; the annular spring is sleeved on the outside of the pump core convex tail and pressed between the top cover 1 and the pump core base.

[0078] The third embodiment of the present invention is a mounting structure for an external end of a ground-penetrating ejector pump, and its structure is basically the same as that of the second embodiment, except that it includes: the external end of the ground-penetrating ejector pump described in this embodiment.

[0079] Example 4

[0080] The structure of the external end cap of the ground-penetrating ejector pump of the fourth embodiment of the present invention is basically the same as that of the third embodiment, except that the outer wall of the thin-walled flange is formed with a dedicated thread 3'. The dedicated thread 3' is used to install a gripping member to facilitate the gripping of the container during maintenance.

[0081] The fourth embodiment of the present invention is a mounting structure for the external end of a ground-penetrating ejector pump, and its structure is basically the same as that of the third embodiment, except that it includes: the external end of the ground-penetrating ejector pump described in this embodiment.

[0082] The maintenance operation process of the external end of a through-the-ground ejector pump of this embodiment is as follows:

[0083] Based on the characteristics of the radioactive liquid being transported, the design of the ejector pump fully considers maintenance requirements and accessibility during maintenance activities. The external end cap plays a crucial role in the maintenance process, ensuring the correct removal and installation of the nozzle and the precise positioning of the maintenance container, while minimizing the duration and complexity of maintenance operations.

[0084] Upon receiving the fault alarm signal, the production control system automatically stops the ejector pump. Maintenance personnel enter the workroom 8 and scan and verify the barcode and code 1″′ to confirm that the faulty equipment is consistent with the system prompt. They then use a special tool to remove the customized hexagon socket bolt 6 and remove the top cover 1 and the clamping structure 2 in turn. The gripping component is installed on the flange through the special thread 3′ on the upper part of the flange.

[0085] The maintenance container is accurately positioned on the base 4 through a special support frame that is stably placed on the pad 5. The old pump core 12 in the pump casing 11 in the hot chamber 10 is pulled out, and the pre-loaded new pump core 12 is slowly lowered into the pump casing 11 along the pump core installation channel 7 through rotation and transposition. The eccentric positioning mechanism 3" at the bottom of the flange is accurately matched and guided in the positioning hole 4" of the base 4 to ensure that the pump core 12 is correctly and properly installed.

[0086] Finally, the maintenance container is evacuated and the removed old pump core 12 is safely transferred to a specialized facility and unloaded into the container that originally enclosed the new pump core 12 for cement curing. Simultaneously, on-site maintenance personnel remove the gripping components on the flange 3 of the new pump core 12 and sequentially reinstall the clamping structure 2, top cover 1, and hexagon socket bolts 6. The serial number on the tail of the new pump core 12, which is exposed through the center hole 1' of the top cover, is checked and confirmed to be consistent with the system. The ejector pump is then restored to its original state and put into operation.

[0087] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An external end of a ground-penetrating structure jet pump, characterized in that: It includes a top cover, a clamping structure, a flange, a base and a pad; the pad forms a base placement through hole in a direction perpendicular to the plane of the pad; the base is embedded in the base placement through hole, and the top surface of the base is flush with the top surface of the pad; the axial position of the base is passed through to form a pump core installation channel, the lower part of the pump core installation channel expands outward to form a pump casing connection notch, and the top surface of the base is concave around the pump core installation channel to form a flange installation concave surface; the lower part of the flange is installed in the flange installation concave surface; the top cover and the base are detachably connected; the flange sleeve is welded to the tail end of the pump core, the pump core is passed through the pump core installation channel, and the clamping structure is pressed between the top cover and the pump core.

2. The external end head of the ground-penetrating structure ejector pump according to claim 1, characterized in that: The pump core includes a pump core base and several process pipe openings with nozzles. The end of the pump core base is contracted to form a pump core convex tail; a top cover center hole is opened on the top of the top cover, and the inner diameter of the top cover center hole matches the outer diameter of the pump core convex tail.

3. The external end head of the ground-penetrating structure ejector pump according to claim 1, characterized in that: The bottom of the top cover extends outward to form a top cover plate, and the top cover plate forms a plurality of T-shaped threaded through holes; the top surface edge of the base forms a plurality of threaded holes corresponding to the T-shaped threaded through holes; the top cover and the base are fixed by screwing a plurality of hexagon socket bolts passing through the T-shaped threaded through holes and the threaded holes.

4. The external end head of the ground-penetrating structure jet pump according to claim 2, characterized in that: The compression structure includes a metal expansion bellows and an annular spring; the annular spring is arranged in the metal expansion bellows, and the two ends of the annular spring are connected to the two ends of the metal expansion bellows; the annular spring is sleeved on the outside of the pump core convex tail and pressed between the top cover and the pump core base.

5. The external end head of the ground-penetrating structure jet pump according to claim 3, characterized in that: The flange includes a flange plate and a thin-walled flange formed on the top surface of the flange plate; the flange plate and the thin-walled flange are coaxially connected to form a pump core connecting hole, and the pump core is welded in the pump core connecting hole; the flange plate is arranged in the flange mounting concave surface and the top surface of the flange plate is flush with the top surface of the base; the top surface of the thin-walled flange is flush with the convex tail surface of the pump core; the inner wall of the top cover is tightly fitted with the outer wall of the thin-walled flange, and the bottom surface of the top cover plate is tightly fitted with the top surface of the flange plate and the top surface of the base; the flange, the base and the top cover are tightly matched to form a labyrinth sealing structure.

6. The external end head of the ground-penetrating structure jet pump according to claim 5, characterized in that: The outer wall of the thin-walled flange forms a dedicated thread.

7. The external end head of the ground-penetrating structure jet pump according to claim 5, characterized in that: An eccentric positioning mechanism is formed at the bottom of the flange; a positioning hole corresponding to the eccentric positioning mechanism is formed on the flange mounting concave surface; and the eccentric positioning mechanism and the positioning hole are in a trace interference fit.

8. The external end head of the ground-penetrating structure jet pump according to claim 5, characterized in that: The base includes a base plate and a thick-walled flange formed on the bottom surface of the base plate; the base plate and the thick-walled flange are coaxially connected to form the pump core installation channel; the top surface of the base plate is concave around the pump core installation channel to form the flange installation concave surface; the inner wall of the thick-walled flange expands outward to form the pump casing connection groove.

9. The external end head of the ground-penetrating structure jet pump according to claim 8, characterized in that: The top surface of the pad fits the base contour and penetrates downward to form the base placement through hole consistent with the base shape; the base is arranged in the base placement through hole, and the top surface of the base plate is flush with the top surface of the pad.

10. A mounting structure for an external end of a ground-penetrating ejector pump, characterized in that: include: The external end head of the through-the-ground structure ejection pump, the mounting floor or wall, the pump casing and the pump core according to any one of claims 1 to 9; the pad is arranged parallel to or obliquely with the mounting floor or wall and is nested and cast in the mounting floor or wall; the mounting floor or wall is a mounting floor or a mounting wall; when the pad is arranged horizontally on the mounting floor, the top surface of the pad is flush with the first side surface of the mounting floor; when the pad is arranged obliquely on the mounting wall, the top surface of the pad is at an upward angle of 12° with the first side surface of the mounting wall; the mounting The mounting floor or wall forms a passage that cooperates with the base mounting through-hole; the base portion passes through the base mounting through-hole and is cast into the passage, the bottom surface of the base is flush with the second side surface of the mounting floor or wall, and the second side surface is opposite to the first side surface; the pump casing is coaxially welded to the pump casing connection groove of the base; the flange is coaxially welded to the outer periphery of the tail end of the pump core, the pump core is passed through the pump core mounting channel and positioned and installed in the pump casing, and the pump casing is coaxial with the pump core mounting channel and has the same inner diameter.

Images