Ground penetrating structure jet pump external end and mounting structure thereof

Abstract

The invention discloses a ground penetrating structure jet pump external end and a mounting structure thereof. The end 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 the post-treatment radioactive feed liquid conveying process are solved.

Description

Technical Field

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

[0002] Ejector pumps are a type of radioactive liquid transfer and delivery equipment commonly used in reprocessing plants. They are suitable for aqueous solutions that do not have strict requirements on dilution and flow rate, and can transport media containing certain solid particles. As a static power transmission device with no mechanical moving parts in contact with radioactive liquid, ejector pumps ensure operational safety by sacrificing energy efficiency and operational flexibility. The key and fundamental reason for their widespread application is that they can operate stably for a long time without maintenance.

[0003] The long-term operation experience of domestic post-processing facilities shows that in the actual working process, due to the limitations of the working mechanism and structural form, a typical ejector pump has several problems: First, the pressure at the pump suction port is lower than the saturated vapor pressure of the ejection liquid, resulting in cavitation and damage to the nozzle, making it impossible to transport; second, long-term high-temperature, high-pressure, high-speed working medium friction and nozzle wear in a high-acid environment lead to a decrease or loss of pump performance; third, when the liquid crystallizes or the solid particle content is high, it is easy to cause crystallization and blockage of the throat and other pipe openings. The occurrence of these situations will force the process operation to be interrupted, and usually requires direct manual intervention and disposal, and the effect is often very limited. Not only does it seriously affect the continuous, stable and safe operation of the process system, but it also contributes a large amount of personnel dose, which is very unfavorable to the maintenance of the factory's operating rate and equipment reliability.

[0004] Figure 1 The schematic diagram is a typical structural diagram of an existing ejector pump, wherein the working medium 15 is accelerated in the nozzle 13 to form a high-speed jet, the speed is increased and adiabatically expands to form a lower negative pressure, the ejection liquid 16 is sucked in and continuously mixed 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, and then decelerated and pressurized to a certain back pressure and ejected from the ejector pump.

[0005] Although the domestic industry has carried out a lot of basic science 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 solved, and have become increasingly prominent under the strong situation of the active and orderly promotion of projects in major post-processing plants in my country. In addition, from the current operation and maintenance status of ground-penetrating pump and valve process equipment in the domestic post-processing field, there is a common situation where equipment is installed and maintained directly on the concrete floor of the workshop without a special installation surface on the outside, which may lead to the inability or difficulty of docking the maintenance container with the equipment due to insufficient flatness of the ground, and the failure of radioactive shielding or gas negative pressure sealing during the maintenance process, which brings great challenges and uncertainties to the application and maintenance of related equipment.

[0006] In addition to being related to operating conditions and running conditions, the working state of post-processing process equipment is also determined by their good design. In order to solve the maintenance problems of nozzle wear and throat blockage that are prone to occur in some post-processing radioactive liquid transportation processes, and the problem that existing through-the-ground structure pump and valve process equipment do not have a special installation surface, a novel through-the-ground structure ejector pump with a replaceable nozzle is designed based on the typical ejector pump from the perspective of structural improvement and optimization. The external end located in the workshop is an indispensable key component of the through-the-ground structure ejector pump, including the top cover, clamping mechanism, flange, base and pad, etc., which are important components and structures to ensure function realization and operational safety. Summary of the invention

[0007] In view of the deficiencies in the above-mentioned prior art, 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 present invention provides an external end of a through-the-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 groove, 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 is detachably connected to the base; the flange sleeve 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 a plurality of 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 at 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 screwed and fixed by 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 implementation manner, the outer wall of the thin-walled flange forms a dedicated thread.

[0014] As an implementation mode, 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 invention discloses an external terminal installation structure of a through-the-ground structure ejection pump, comprising: the external terminal of the through-the-ground structure ejection pump, an installation floor or wall, a pump casing and the pump core; the pad is arranged parallel to or obliquely with the installation floor or wall and is nested and cast in the installation floor or wall; the installation floor or wall is an installation floor or an installation wall; when the pad is arranged horizontally on the installation floor, the top surface of the pad is flush with the first side surface of the installation floor; when the pad is arranged obliquely on the installation wall, the top surface of the pad is upwardly aligned with the first side surface of the installation wall. 12° included angle; 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, 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 connecting 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 inserted into the pump core installation channel and positioned and installed in the pump casing, the pump casing is coaxial with the pump core installation channel and has the same inner diameter.

[0018] The present invention adopts the above technical solution, so 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 related disassembled parts; the base can absorb the expansion stress transmitted by the expansion of the pump shell 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 trace interference fit between the eccentric positioning mechanism and the positioning hole ensures the correct installation of the pump core. The outer wall of the thin-walled flange forms a special thread for installing the grasping component during maintenance, so as to complete the grasping of the pump core in conjunction with the maintenance container; the clamping structure can pressurize 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 and sealing, and the center hole of the top cover is used to avoid the pump core convex tail 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 can make the designed ejector pump fully possess and play a complete use function 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 of the designed priming pump during maintenance.

[0024] 5. Through reasonable material selection, all structures are 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 creative work.

[0026] Figure 1 It is a structural schematic diagram 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 structure 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 4 A three-dimensional diagram of the outer end of the ground-penetrating structure ejector pump according to an embodiment of the present application;

[0030] Figure 5 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 housing;

[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 following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "connection" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Example 1

[0061] See also Figure 2 to Figure 6 , an external end head of a through-the-ground structure injection pump according to an embodiment of the present invention comprises a top cover 1, a clamping structure 2, a flange 3, a base 4 and a pad 5; the pad 5 forms a base placement through hole in a direction perpendicular to the plane of the pad 5; the base 4 is embedded in the base placement through hole, and the top surface of the base 4 is flush with the top surface of the pad 5; the axial position of the base 4 is penetrated to form a pump core installation channel 7, the lower part of the pump core installation channel 7 is expanded outward to form a pump casing connection notch, and the top surface of the base 4 is concave around the pump core installation channel 7 to form a flange installation concave surface; the lower part of the flange 3 is installed in the flange installation concave surface; the top cover 1 and the base 4 are detachably connected; the flange 3 is sleeved and welded on the tail end of the pump core 12, the pump core 12 is penetrated in the pump core installation channel 7, and the clamping structure 2 is pressed between the top cover 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 by means of a customized hexagon socket bolt 6 through a T-shaped threaded through hole 1" and a threaded hole 4', which mainly plays the role of tightening, pressing and sealing. The barcode and code 1"' on the upper surface of the top cover 1 are unique, which are determined and laser engraved when the ejector pump is manufactured, and are used for equipment management and information retrieval throughout the life of the project.

[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 convex tail table of the pump core; 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; and 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 with the pump core 12, and the eccentric positioning mechanism 3" at the bottom of the flange 3 is precisely matched with the positioning hole 4" of the base 4 to ensure the correct installation of the nozzle. The upper thin-wall flange end face of the flange 3 is flush with the pump core convex tail contraction end face of the pump core 12 to facilitate the placement of the clamping structure 2, and the lower flange plate can be tightly placed in the flange installation concave surface of the base 4 and closely cooperate with it to form a labyrinth sealing structure to prevent the radioactive gaseous substances in the pump housing 11 from overflowing, thereby ensuring the 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 appearance 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 is partially cast into the concrete structure of the floor 9 between the workshop and the hot chamber after passing through the base placement through hole. The thickness is consistent and the top and bottom are flush with it, ensuring the fixed connection with the pad 5, the floor 9 between the workshop and the hot chamber, and the pump casing 11, and serving as the installation basis for other structural components. The upper base plate of the base 4 is nested in the base placement through hole of the pad 5, and the lower thick-walled flange is coaxially nested and welded to the pump casing 11 located in the hot chamber 10 through the pump casing connection notch. The double-layer pump casing 11 can effectively prevent corrosion and compensate for the expansion phenomenon during the operation of the ejector pump, and the base 4 can well absorb the conducted expansion stress to eliminate the possible vibration of the pump core 12 when the ejector pump is working.

[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 disassembled related parts.

[0071] The present invention provides an external terminal mounting structure of a through-the-ground structure ejection pump, comprising: the external terminal 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 inclined 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 arranged obliquely on the mounting wall, the top surface of the pad 5 is 12° upward from 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 in the pump casing connecting groove of the base 4; the flange 3 is coaxially welded and sleeved on the outer periphery of the rear end of the pump core 12, the pump core 12 is penetrated through the pump core installation channel 7 and 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 external end of a through-the-ground structure injection pump of the second embodiment of the present invention has a structure that is basically the same as that of the first embodiment, except that the pump core 12 includes a pump core base and a plurality of process nozzles with nozzles, and the end of the pump core base is contracted to form a pump core convex tail; a top cover center hole 1' is provided at the top of the top cover 1, and the inner diameter of the top cover center hole 1' matches the outer diameter of the pump core convex tail. The top cover center hole 1' allows the pump core convex tail of the pump core 12 to pass through, so as to check the pump core 12 number, apply pressure to the clamping structure 2, and limit the pump core 12.

[0075] The external terminal mounting structure of a through-the-ground structure ejection pump of the second embodiment of the present invention is basically the same as that of the first embodiment, and the difference lies in that it includes: the external terminal of the through-the-ground structure ejection 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 that is 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 external terminal mounting structure of a through-the-ground structure ejection pump of the third embodiment of the present invention is basically the same as that of the second embodiment, except that it includes: the external terminal of the through-the-ground structure ejection pump described in the present embodiment.

[0079] Example 4

[0080] The structure of the external end of the ground-penetrating injection 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 forms a special thread 3' which is used to install a gripping component during maintenance to facilitate the gripping of the container.

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

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

[0083] Based on the characteristics of the radioactive liquid being transported, the designed ejector pump fully considers the maintenance requirements and accessibility of maintenance activities in terms of structure. The external end plays an extremely important and critical role in the maintenance process. While ensuring the correct disassembly and assembly of the nozzle and the precise positioning of the maintenance container, it also shortens the duration of the maintenance activities as much as possible and reduces the complexity of the maintenance operation.

[0084] The production control system automatically stops the operation of the priming pump immediately after receiving the fault alarm signal. The maintenance personnel enter the workshop 8 to scan and check the barcode and code 1″′ to determine that the faulty equipment is consistent with the system prompt. Then, the customized hexagon socket bolt 6 is removed with a special tool, and the top cover 1 and the clamping structure 2 are removed in turn, and the grabbing 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 heat 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 by rotation and transposition, and 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 inspection container is evacuated and the removed old pump core 12 is safely transferred to a special facility and unloaded into the container that originally packaged the new pump core 12 for cement solidification. At the same time, the on-site maintenance personnel remove the grabbing parts on the flange 3 of the new pump core 12 and sequentially reinstall the clamping structure 2, the top cover 1 and the hexagon socket bolt 6, check the number of the tail of the new pump core 12 exposed from the center hole 1' of the top cover and confirm that it is consistent with the system, and the priming pump is restored to its original state and enters the working state.

[0087] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. An external end of a ground-penetrating structure ejector 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 groove, 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 is detachably connected to the base; the flange sleeve is welded to the rear 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.

2. The outer end of the ground penetration structure ejector pump according to claim 1, characterized in that: The pump core comprises a pump core base and a plurality of 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 provided on the top of the top cover. The inner diameter of the top cover center hole matches the outer diameter of the pump core convex tail.

3. The outer end of the ground penetration 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 screwed and fixed by a plurality of hexagon socket bolts passing through the T-shaped threaded through holes and the threaded holes.

4. The outer end of the ground penetration structure ejector pump according to claim 2, characterized in that: 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.

5. The outer end of the ground penetration structure ejector 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 table 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 outer end of the ground penetration structure ejector pump according to claim 5, characterized in that: The outer wall of the thin-walled flange forms a dedicated thread.

7. The outer end of the ground penetration structure ejector 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 outer end of the ground penetration structure ejector 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 outer end of the ground penetration structure ejector 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. An external end mounting structure of a ground-penetrating ejector pump, characterized in that: include: The external end of the through-the-ground structure ejection pump, the mounting floor or wall, the pump casing and the pump core as described in 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 in the pump casing connecting 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 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.

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