Wear-resistant split type flow guide shell structure for deep-well pump and deep-well pump

Abstract

The flow guide shell structure comprises a flow guide shell used for placing an impeller of the deep-well pump and a wear-resistant part arranged on the inner wall of the flow guide shell, the flow guide shell comprises a shell body, the whole body of the shell body is annular, and the shell body is provided with an upper port and a lower port which are opposite up and down; the cover plate is detachably connected to the lower port of the shell body; and the wear-resistant part is correspondingly arranged on the inner circumferential wall of the shell body. The split design is adopted, so that the flow guide shell is more convenient to mount and dismount, the operation difficulty is reduced, the working efficiency is improved, particularly, the mounting process of a wear-resistant part in the flow guide shell is effectively simplified, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of deep well pumps, in particular to a wear-resistant split guide shell structure for a deep well pump and a deep well pump. Background Art

[0002] The existing deep well pump includes a multi-section impeller assembly arranged in a guide shell, and each section of the impeller assembly includes an impeller, a guide vane matched with the impeller, and a cover plate matched with the guide vane. Since the well water in the actual use environment of the deep well pump often contains sediment, the sediment contained in the water flow pumped into the deep well pump will drive the water flow to continuously impact and rub the guide shell as the impeller rotates. After the pump has been running for a long time, the part of the guide shell that matches the impeller is easy to wear through, and even cause the guide shell to rupture. After the guide shell is worn through, the working efficiency of the pump is affected. If the guide shell ruptures, the entire pump cannot work normally and fails.

[0003] In order to solve the above technical problems, the Chinese utility model patent application with application number CN201920447977.6 discloses a guide shell and a well pump with an improved structure, wherein an insert is arranged on the inner wall of the guide shell body, the insert is made of rubber material, the insert cooperates with the impeller assembly cavity, and the shape of the insert is adapted to the shape of the inner wall of the corresponding part of the guide shell body. Specifically, the bottom wall of the insert includes an upper annular portion, the inner circular edge of the upper annular portion has a lower folded ring wall, the upper annular portion covers the upper surface of the bottom plate of the guide shell, the lower folded ring wall fits the inner annular wall of the bottom plate of the guide shell, and also includes a lower annular portion, the inner circular edge of the lower annular portion is connected to the lower end of the lower folded ring wall, and the shape and area of ​​the lower annular portion are adapted to the lower surface of the bottom plate of the guide shell. The upper annular portion, the lower folded ring wall and the lower annular portion of the insert jointly cover the bottom wall of the guide shell. An insert is provided on the guide shell at a position corresponding to the impeller. The insert has wear-resistant characteristics. When the insert is damaged by the impact of mud and sand or wear and tear, the insert can be replaced in time, which can prevent the guide shell from being impacted and worn and teared by mud and sand, thereby increasing the service life of the guide shell and preventing the pump from being damaged by the guide shell and affecting the working efficiency or failing to work normally.

[0004] However, the deep well pump in the above patent application still has certain shortcomings. Since the bottom wall of the insert is a bushing structure formed by an upper circular portion, a lower folded ring wall and a lower circular portion to cover the bottom wall of the guide shell, this structure makes the installation process of the insert on the guide shell very complicated, especially due to the space limitation of the guide shell, which leads to inconvenience in operation and increases the difficulty of installing the rubber parts.

[0005] Therefore, the existing deep well pump guide shell structure needs to be further improved. Utility Model Content

[0006] The first technical problem to be solved by the utility model is to provide a wear-resistant split guide shell structure for a deep well pump which can effectively simplify the installation process of the wear-resistant sleeve in view of the current status of the prior art.

[0007] The second technical problem to be solved by the utility model is to provide a deep well pump using the above-mentioned guide shell in view of the current status of the prior art.

[0008] The technical solution adopted by the utility model to solve the first technical problem is: a wear-resistant split guide shell structure for a deep well pump, including a guide shell for placing an impeller of the deep well pump and a wear-resistant part arranged on the inner wall of the guide shell, the guide shell includes:

[0009] The shell body is in a circular tubular shape as a whole and has an upper port and a lower port which are opposite to each other;

[0010] A cover plate, detachably connected to the lower port of the shell body;

[0011] The wear-resistant parts are correspondingly arranged on the inner peripheral wall of the shell body.

[0012] In order to realize the assembly between the cover plate and the shell body and effectively prevent the radial displacement of the two due to force or vibration during operation, thereby ensuring the stability and reliability of the entire structure, the peripheral edge of the lower port of the shell body has a first extension portion extending radially inward and a first annular stop edge extending downward from the first extension portion, and the outer peripheral edge of the cover plate has a first limit stop edge extending upward, and the first limit stop edge is arranged outside the first annular stop edge of the shell body.

[0013] In order to further ensure the reliability of assembly between the cover plate and the shell body, the top surface of the main body of the cover plate is provided with a concave annular groove on the inner side of the first annular retaining edge for limiting the lower end of the first annular retaining edge.

[0014] In order to arrange wear-resistant parts on the shell body and ensure the reliability of the installation of the wear-resistant parts, the peripheral edge of the upper port of the shell body has a second extension portion extending radially inward, and the area on the inner peripheral wall of the shell body located between the first extension portion and the second extension portion forms a placement recess for placing the wear-resistant parts.

[0015] In order to securely fit with the guide vanes of the deep well pump, the shell body also has a second annular retaining edge extending upward from the second extension portion, the outer peripheral wall of the second annular retaining edge is recessed inward relative to the outer peripheral wall of the main body of the shell body and correspondingly constructs a second limiting step for connecting the guide vanes of the deep well pump.

[0016] As another embodiment of the connection structure between the cover plate and the shell body, the top of the cover plate has a second limit stop edge extending upward near its outer periphery, and the periphery of the lower port of the shell body is arranged outside the second limit stop edge and abuts against the top of the outer periphery of the cover plate.

[0017] In order to facilitate the connection between the upper port of the shell body and the guide vane, the lower end of the wear-resistant part abuts against the top of the second limit stop edge, and the upper end is lower than the top surface of the upper port of the shell body.

[0018] As an improvement, the wear-resistant part is a rubber part. The rubber part can not only reduce the impact and wear of sand and gravel in the water flow on the guide shell, but also has a certain buffering and vibration reduction function, thereby increasing the service life of the deep well pump.

[0019] The technical solution adopted by the utility model to solve the second technical problem is: a deep well pump, including a plurality of impeller water delivery units arranged in sequence along the axial direction, each impeller water delivery unit includes an impeller, a guide vane and a guide shell, the guide shell adopts the wear-resistant split guide shell structure for deep well pumps as mentioned above, the impeller is arranged in the guide shell, and the guide vane is connected to the upper port of the shell body.

[0020] As an improvement, the guide vane includes an annular wall, a connecting portion located inside the annular wall, and a plurality of blades connected between the annular wall and the connecting portion and arranged in sequence along the circumferential direction. A first axial hole for accommodating an inner sleeve made of wear-resistant material is opened in the middle of the connecting portion, and the lower end of the annular wall is connected to the upper port of the shell body.

[0021] Compared with the prior art, the utility model has the following advantages: the wear-resistant split guide shell for deep well pumps is a split structure assembled with a shell body and a cover plate. The split design makes the guide shell more convenient to install and disassemble, reduces the difficulty of operation, improves work efficiency, and especially effectively simplifies the processing process of setting wear-resistant parts in the guide shell, thereby improving assembly efficiency. On the other hand, the split design allows each part of the guide shell to be manufactured and replaced separately, improving the interchangeability of parts, especially the shell body can be directly cut from steel pipes, which is very convenient to obtain materials and is also conducive to fixing the wear-resistant parts on the inner circumferential wall of the shell body. This helps to reduce inventory costs, because only the required parts can be replaced for different degrees of wear or damage, rather than the entire guide shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the guide shell structure of the deep well pump of Example 1 of the utility model;

[0023] Figure 2 It is a sectional stereoscopic view of the guide shell structure of the deep well pump of Example 1 of the utility model cut along the axial direction;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the deep well pump of Example 1 of the utility model;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the deep well pump of Embodiment 1 of the utility model from another angle;

[0026] Figure 5 It is a sectional stereoscopic view of the deep well pump of Example 1 of the utility model cut along the axial direction;

[0027] Figure 6 This is an exploded view of the deep well pump of Example 1 of the utility model after being cut along the axial direction;

[0028] Figure 7 It is a sectional stereoscopic view of the deep well pump of Example 2 of the utility model cut along the axial direction;

[0029] Figure 8 This is an exploded view of the deep well pump of Example 2 of the utility model after being cut along the axial direction;

[0030] Fig. 9 It is a sectional stereoscopic view of the guide shell structure of the deep well pump of Example 2 of the utility model cut along the axial direction. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0033] Example 1

[0034] Figure 1-Figure 6The utility model shows a preferred embodiment of a wear-resistant split guide shell structure for a deep well pump and a deep well pump. The deep well pump includes a pump shaft (not shown) and a plurality of impeller water delivery units arranged in sequence along the axial direction. Each impeller water delivery unit includes an impeller 20, a guide vane 30 and a guide shell. The impeller 20 is arranged in the guide shell and driven to rotate by the pump shaft. The guide vane 30 is connected to the upper port 101 of the shell body 10. The guide vane 30 includes an annular wall 31, a connecting portion 32 located in the annular wall 31, and a plurality of blades 33 connected between the annular wall 31 and the connecting portion 32 and arranged in sequence along the circumferential direction. A guide flow channel 34 arranged in sequence along the circumferential direction is formed correspondingly between the plurality of blades 33. The guide flow channel 34 is arranged in a spiral arrangement and is used to guide the water pumped out of the impeller 20 of the impeller water delivery unit to the next impeller water delivery unit. A first shaft hole 320 is provided in the middle of the connecting portion 32 of the guide vane 30, and an inner bushing 35 made of a wear-resistant material for the pump shaft to pass through is arranged in the first shaft hole 320. The lower end of the annular wall 31 of the guide vane 30 is connected to the upper port 101 of the shell body 10 of the impeller water delivery unit, and the upper end is connected to the guide shell (specifically the cover plate 15) of the previous impeller water delivery unit.

[0035] The guide shell structure of this embodiment includes a guide shell and a wear-resistant part 16 arranged on the inner wall of the guide shell. The guide shell is a split structure, specifically including a shell body 10 and a cover plate 15. The shell body 10 is in a circular tube shape as a whole, and has an upper port 101 and a lower port 102 opposite to each other. The cover plate 15 is detachably connected to the lower port 102 of the shell body 10. A second shaft hole 154 for the pump shaft to pass through is opened in the middle of the cover plate 15. A step can be set at the second shaft hole 154 to place a gasket 40 adapted to the impeller 20. The wear-resistant part 16 is correspondingly arranged on the inner circumferential wall of the shell body 10, wherein the axial length of the wear-resistant part 16 is smaller than the axial length of the shell body 10. After the wear-resistant part 16 is installed on the inner circumferential wall of the shell body 10, there is a distance between the lower end of the wear-resistant part 16 and the bottom wall of the lower port 102 of the shell body 10. Similarly, there is also a distance between the upper end of the wear-resistant part 16 and the top wall of the upper port 101 of the shell body 10. The above-mentioned wear-resistant part 16 can be a rubber part, which can not only reduce the impact and wear of sand and gravel in the water flow on the diversion shell, but also has a certain buffering and vibration reduction function, thereby improving the service life of the deep well pump. The wear-resistant part 16 can be formed on the inner circumferential wall of the shell body 10 by vulcanization process, or it can be fixed to the inner circumferential wall of the shell body 10 by tight fit or bonding.

[0036] The top of the cover plate 15 of this embodiment has a second limit stop edge 152 extending upward near its outer peripheral edge, and the second limit stop edge 152 is recessed inwardly relative to the outer peripheral wall of the cover plate 15 by a distance, thereby forming a third limit step 155. The peripheral edge of the lower port 102 of the shell body 10 is sleeved outside the second limit stop edge 152 and abuts against the top of the outer peripheral edge of the cover plate 15, that is, the peripheral edge of the lower port 102 of the shell body 10 is limited on the third limit step 155 of the cover plate 15. The lower end of the wear-resistant part 16 abuts against the top of the second limit stop edge 152, and the upper end is lower than the top surface of the upper port 101 of the shell body 10, so as to facilitate the connection between the upper port 101 of the shell body 10 and the annular wall 31 of the guide vane 30. Specifically, a fifth limiting step 311 is formed by a radial inward concave on the outer wall surface of the bottom port of the annular wall 31 of the guide vane 30, and the peripheral edge of the upper port 101 of the shell body 10 can just be arranged outside the fifth limiting step 311, and the upper end surface of the wear-resistant part 16 is against the bottom of the fifth limiting step 311 of the guide vane 30.

[0037] In order to ensure the secure assembly between the two adjacent impeller water delivery units, a sixth limiting step 312 that is concave radially outward is formed on the inner peripheral wall of the top port of the annular wall 31 of the guide vane 30, and correspondingly, a fourth limiting step 156 that is concave radially is formed at the bottom of the outer peripheral wall of the cover plate 15. The fourth limiting step 156 on the cover plate 15 of the upper impeller water delivery unit can be assembled with the sixth limiting step 312 on the guide vane 30 of the lower impeller water delivery unit, and the two form a limit in the radial direction, so that the two can avoid radial displacement due to force or vibration during operation, thereby ensuring the stability and reliability of the entire structure.

[0038] In this embodiment, the guide shell for the deep well pump is a split structure assembled with a shell body 10 and a cover plate 15. The split design makes the guide shell more convenient to install and disassemble, reduces the difficulty of operation, and improves work efficiency. In particular, it effectively simplifies the installation process of the wear-resistant parts 16 in the guide shell, and improves assembly efficiency. On the other hand, the split design allows each part of the guide shell to be manufactured and replaced separately, improving the interchangeability of parts. This helps to reduce inventory costs, because only the required parts can be replaced for different degrees of wear or damage, rather than the entire guide shell.

[0039] Example 2

[0040] Figure 7-Figure 9Another preferred embodiment of the wear-resistant split guide shell structure for deep well pump and deep well pump of the utility model is shown. The difference between this embodiment and embodiment 1 is that the matching structure between the lower port 102 of the shell body 10 of the deep well pump and the cover plate 15 and the matching structure between the annular wall 31 of the guide vane 30 and the upper port 101 of the shell body 10 are different. Specifically, the circumference of the lower port 102 of the shell body 10 has a first extension portion 111 extending radially inward and a first annular retaining edge 112 extending downward from the first extension portion 111. The outer peripheral wall of the first annular retaining edge 112 is recessed inward relative to the outer peripheral wall of the main body of the shell body 10 and a first limiting step 131 is correspondingly constructed. Similarly, the upper port 101 of the shell body 10 has a second extension portion 121 extending radially inwardly and a second annular retaining edge 122 extending upwardly from the second extension portion 121 at the circumference thereof. The outer circumferential wall of the second annular retaining edge 122 is recessed inwardly relative to the outer circumferential wall of the main body of the shell body 10 and correspondingly forms a second limiting step 132. Fig. 9 The area between the first extension part 111 and the second extension part 121 on the inner circumferential wall of the shell body 10 forms a placement recess 14 for placing the wear-resistant member 16. The axial dimension of the wear-resistant member 16 is substantially consistent with the axial dimension of the placement recess, that is, the upper end of the wear-resistant member 16 abuts against the second extension part 121, and the lower end abuts against the first extension part 111.

[0041] The outer peripheral edge of the cover plate 15 has a first limit stop edge 151 extending upward, and the top surface of the main body of the cover plate 15 has a concave annular groove 153 on the inner side of the first annular stop edge 112. When the cover body and the shell body 10 are assembled, the first limit stop edge 151 of the cover plate 15 is sleeved outside the first annular stop edge 112 of the shell body 10, that is, it is limited at the first limit step 131 of the shell body 10. At the same time, the lower end of the first annular stop edge 112 of the shell body 10 is inserted into the annular groove 153 of the cover plate 15, thereby ensuring the reliability of the assembly between the cover plate 15 and the shell body 10. The inner wall surface of the bottom port of the annular wall 31 of the guide vane 30 has a seventh limit step 313 that is concave radially outward, and the seventh limit step 313 can be assembled with the second limit step 132 at the upper port 101 of the shell body 10 to achieve radial limit.

[0042] Similar to the first embodiment, in order to ensure the secure assembly between the two adjacent impeller water delivery units, a sixth limiting step 312 which is concave radially outward is formed on the inner peripheral wall of the top port of the annular wall 31 of the guide vane 30, and correspondingly, a fourth limiting step 156 which is concave radially is formed at the bottom of the outer peripheral wall of the cover plate 15. The fourth limiting step 156 on the cover plate 15 of the upper impeller water delivery unit can be assembled with the sixth limiting step 312 on the guide vane 30 of the lower impeller water delivery unit, and the two are limited in the radial direction, so that the two can avoid radial displacement due to force or vibration during operation, thereby ensuring the stability and reliability of the entire structure.

Claims

1. A wear-resistant split guide shell structure for a deep well pump, comprising a guide shell for placing an impeller (20) of the deep well pump and a wear-resistant part (16) arranged on the inner wall of the guide shell, characterized in that The guide shell includes: The shell body (10) is in the shape of a circular tube as a whole and has an upper port (101) and a lower port (102) which are opposite to each other. A cover plate (15) is detachably connected to the lower port (102) of the shell body (10); The wear-resistant part (16) is correspondingly arranged on the inner peripheral wall of the shell body (10).

2. The wear-resistant split guide shell structure for deep well pump according to claim 1 is characterized in that: The lower port (102) of the shell body (10) has a first extension portion (111) extending radially inward and a first annular stop edge (112) extending downward from the first extension portion (111) at the circumferential edge, and the outer circumferential edge of the cover plate (15) has a first limit stop edge (151) extending upward, and the first limit stop edge (151) is sleeved outside the first annular stop edge (112) of the shell body (10).

3. The wear-resistant split guide shell structure for deep well pump according to claim 2 is characterized in that: The top surface of the main body of the cover plate (15) is provided with a concave annular groove (153) on the inner side of the first annular retaining edge for limiting the lower end of the first annular retaining edge (112).

4. The wear-resistant split guide shell structure for deep well pump according to claim 2 is characterized in that: The upper port (101) of the shell body (10) has a second extension portion (121) extending radially inward at the circumferential edge thereof, and an area between the first extension portion (111) and the second extension portion (121) on the inner circumferential wall of the shell body (10) forms a placement recessed area (14) for placing the wear-resistant part (16).

5. The wear-resistant split guide shell structure for deep well pump according to claim 4 is characterized in that: The shell body (10) also has a second annular retaining edge (122) extending upward from the second extension portion (121), the outer peripheral wall of the second annular retaining edge (122) is recessed inwardly relative to the outer peripheral wall of the main body of the shell body (10) and correspondingly constructs a second limiting step (132) for connecting a guide vane (30) of a deep well pump.

6. The wear-resistant split guide shell structure for deep well pump according to claim 1 is characterized in that: The top of the cover plate (15) is provided with a second limit stop edge (152) extending upwards adjacent to its outer peripheral edge, and the peripheral edge of the lower port (102) of the shell body (10) is sleeved outside the second limit stop edge (152) and abuts against the top of the outer peripheral edge of the cover plate (15).

7. The wear-resistant split guide shell structure for deep well pump according to claim 6 is characterized in that: The lower end of the wear-resistant part (16) abuts against the top of the second limit stop (152), and the upper end is lower than the top surface of the upper port (101) of the shell body (10).

8. The wear-resistant split guide shell structure for a deep well pump according to any one of claims 1 to 7, characterized in that: The wear-resistant part (16) is a rubber part.

9. A deep well pump, comprising a plurality of impeller water delivery units arranged in sequence along the axial direction, each impeller water delivery unit comprising an impeller (20), a guide vane (30) and a guide shell, characterized in that: The guide shell adopts the wear-resistant split guide shell structure for deep well pumps as described in any one of claims 1 to 8, the impeller (20) is arranged in the guide shell, and the guide vane (30) is connected to the upper port (101) of the shell body (10).

10. The deep well pump according to claim 9, characterized in that: The guide vane (30) comprises an annular wall (31), a connecting portion (32) located inside the annular wall (31), and a plurality of blades (33) connected between the annular wall (31) and the connecting portion (32) and arranged in sequence and spaced apart along the circumferential direction. A first axial hole (320) for accommodating an inner bushing (35) made of a wear-resistant material is provided in the middle of the connecting portion (32). The lower end of the annular wall (31) is connected to an upper port (101) of the shell body (10).

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