Pump shaft mounting assembly and multi-stage centrifugal pump overhauling device

Abstract

The utility model provides a pump shaft mounting assembly and a multi-stage centrifugal pump overhauling device, and relates to the technical field of multi-stage centrifugal pump overhauling. The pump shaft mounting assembly comprises a first supporting part, an abutting part and a driving part; the first supporting part is provided with a containing through groove, and the containing through groove extends in the first horizontal direction and can contain a pump shaft. The abutting part comprises two abutting assemblies which are oppositely arranged on the two sides of the containing through groove in the horizontal second direction perpendicular to the first direction, and the abutting assemblies are arranged in the containing through groove in a sliding and penetrating mode and can abut against the two sides of the pump shaft in the second direction in the containing through groove. The driving part is arranged on the first supporting part and connected with the abutting assembly. The driving part drives the abutting assembly to move in the first direction, and the abutting assembly abuts against and drives the pump shaft to move in the containing through groove in the first direction. The problems that when the multi-stage centrifugal pump is overhauled and disassembled, alignment operation between a middle shaft and pump body parts of the multi-stage centrifugal pump is carried out through manual pushing, operation is tedious, and the installation precision and the installation efficiency are low are solved.

Description

Technical Field

[0001] The present application relates to the technical field of multi-stage centrifugal pump maintenance, and in particular to a pump shaft mounting assembly and a multi-stage centrifugal pump maintenance device. Background Art

[0002] A multi-stage centrifugal pump is a pump that connects multiple centrifugal pump impellers in series. When the motor drives the pump shaft to rotate, the impeller installed on the pump shaft rotates accordingly. As the liquid passes through multiple impellers in sequence, the pressure gradually increases under the action of centrifugal force.

[0003] In current technology, when inspecting and disassembling a multi-stage centrifugal pump, a simple auxiliary frame is often used for support, and the alignment operation between the central shaft and the pump body components of the multi-stage centrifugal pump is performed by manual pushing. The operation is cumbersome and the installation accuracy and efficiency are low.

[0004] Therefore, the above problems need to be solved urgently. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a pump shaft mounting assembly and a multi-stage centrifugal pump maintenance device to solve the problem that when repairing and disassembling the multi-stage centrifugal pump, a simple auxiliary frame is often used for support, and the alignment operation between the central shaft and the multi-stage centrifugal pump body components is performed manually, which is cumbersome to operate and has low installation accuracy and efficiency.

[0006] The technical solution is as follows:

[0007] A first aspect of the present application provides a pump shaft mounting assembly, comprising:

[0008] A first support portion, wherein the first support portion is provided with an accommodating through groove, the accommodating through groove extends along a first horizontal direction and can accommodate the pump shaft;

[0009] The resistance part includes two resistance components arranged on both sides of the accommodating slot in a second direction perpendicular to the first direction, the resistance components are slidably arranged in the accommodating slot and can resist the two sides of the pump shaft in the second direction in the accommodating slot;

[0010] A driving part, the driving part is arranged on the first supporting part and connected to the abutting component;

[0011] The driving part drives the abutment assembly to move along the first direction, and the abutment assembly abuts and drives the pump shaft to move along the first direction in the accommodating groove.

[0012] In some embodiments, the aforementioned pump shaft mounting assembly, wherein two sliding slots are respectively opened along the first direction on both sides of the accommodating slot in the second direction, the abutment assembly is slidably arranged in the sliding slots and the first end extends into the accommodating slot to be able to abut the pump shaft.

[0013] In some embodiments, the aforementioned pump shaft mounting assembly, wherein the resistance assembly includes: a resistance member, a connecting member and a pushing member; the resistance member is located at the first end of the resistance assembly; the connecting member is at least partially embedded in the sliding groove and connected to the driving part, and the connecting member is provided with a through hole extending along the second direction; the pushing member is located at the second end of the resistance assembly, the pushing member includes a push rod and an end head, the outer edge size of the end head is larger than the push rod, the push rod is passed through the through hole and connected to the resistance member, and an elastic member sleeved on the push rod is provided between one end of the end head facing the push rod and one end of the connecting member away from the resistance member, and the elastic member has a rebound force to make the resistance member resist the pump shaft.

[0014] In some embodiments, in the aforementioned pump shaft mounting assembly, the outer edge size of the abutment is larger than the outer edge size of the connecting member embedded in the sliding groove, so that the first end of the abutment assembly can be snapped into the accommodating groove.

[0015] In some embodiments, in the aforementioned pump shaft mounting assembly, the abutment member is arc-shaped, and the arc-shaped abutment member is bent away from the connecting member.

[0016] In some embodiments, in the aforementioned pump shaft mounting assembly, an anti-slip member is provided on a surface of a side of the abutment member facing away from the connecting member.

[0017] In some embodiments, the aforementioned pump shaft mounting assembly, wherein the driving part includes: a driving motor, a screw and a driving block; the driving motor is arranged on the first supporting part; the screw is arranged on the first supporting part along the first direction and is connected to the output end of the driving motor; the driving block passes through the screw and is connected to the connecting piece; wherein, the driving motor drives the screw to rotate, the driving block drives the interference assembly to displace along the first direction, and the pump shaft is resisted by the interference piece and driven to displace along the first direction.

[0018] In some embodiments, the aforementioned pump shaft mounting assembly further includes: a limit plate, which is disposed in the accommodating groove and located at both ends of the accommodating groove in the first direction, and the inner side of the limit plate has an arc surface, which can limit the pump shaft in the second direction.

[0019] In some embodiments, the aforementioned pump shaft mounting assembly, wherein the interference portion includes four interference components, the four interference components are symmetrical in pairs along the second direction and are spaced apart along the first direction, and the four interference components are all slidably disposed in the accommodating groove.

[0020] A second aspect of the present application provides a multi-stage centrifugal pump maintenance device, comprising a second support portion and the above-mentioned pump shaft mounting assembly; the upper surface of the second support portion has a first target area, and the first target area can support the multi-stage centrifugal pump; the pump shaft mounting assembly is arranged in a second target area on the upper surface and spaced apart from the first target area along a first direction.

[0021] Through the above technical solution, the pump shaft mounting assembly and the multi-stage centrifugal pump maintenance device of the present application have at least the following advantages:

[0022] A first aspect of the present application provides a pump shaft mounting assembly, comprising a first supporting portion, a resisting portion and a driving portion; the first supporting portion is provided with a accommodating groove, the accommodating groove extends along a horizontal first direction and can accommodate the pump shaft; the resisting portion comprises two resisting components relatively arranged on both sides of the accommodating groove in a horizontal second direction perpendicular to the first direction, the resisting components are slidably arranged in the accommodating groove and can resist on both sides of the pump shaft in the second direction in the accommodating groove; the driving portion is arranged on the first supporting portion and connected to the resisting component; wherein the driving portion drives the resisting component to displace along the first direction, and the resisting component resists and drives the pump shaft to displace along the first direction in the accommodating groove. The first support portion of the pump shaft installation assembly of the present application can provide limited support for the pump shaft that needs to be installed in the multi-stage centrifugal pump through the setting of the accommodating through groove, thereby ensuring the alignment and installation accuracy of the pump shaft. At the same time, the abutment components arranged on both sides of the pump shaft in the second direction can abut the pump shaft, and can drive the pump shaft to move smoothly along the first direction under the drive of the driving unit, thereby realizing the insertion of the pump shaft into the multi-stage centrifugal pump. The present application has a simple structure and convenient operation, and the insertion process is accurately controlled by the abutment portion and the driving unit, thereby realizing the rapid installation between the pump shaft and the multi-stage centrifugal pump after maintenance, thereby effectively improving the installation efficiency. Through the application of the present application, the problem of using a simple auxiliary frame for support when repairing and disassembling a multi-stage centrifugal pump, and performing the alignment operation between the central shaft and the pump body parts of the multi-stage centrifugal pump by manual pushing, which is cumbersome to operate and has low installation accuracy and efficiency is solved.

[0023] The multi-stage centrifugal pump maintenance device provided in the second aspect of the present application has the same or similar technical effects as the pump shaft mounting assembly provided in the first aspect of the present application.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of a partially exploded axonometric structure of a pump shaft mounting assembly provided in an embodiment of the present application is shown;

[0027] Figure 2A schematic diagram of a partially exploded isometric structure of a conflicting component of a conflicting portion of a pump shaft mounting assembly provided by an embodiment of the present application is shown;

[0028] Figure 3 A schematic diagram of a partial axonometric structure of a pump shaft mounting assembly provided in an embodiment of the present application is shown;

[0029] Figure 4 The isometric structural diagram of another pump shaft mounting assembly provided in an embodiment of the present application is schematically shown;

[0030] Figure 5 The schematic diagram of the axonometric structure of a multi-stage centrifugal pump maintenance device provided in an embodiment of the present application after the multi-stage centrifugal pump is installed is shown schematically.

[0031] Description of reference numerals:

[0032] 1. Pump shaft mounting assembly; 11. First supporting portion; 12. Interference portion; 13. Driving portion; 14. Position limiting plate; 111. Accommodating through groove; 121. Interference assembly; 131. Driving motor; 132. Screw rod; 133. Driving block; 1111. Sliding slot; 1211. Interference member; 1212. Connecting member; 1213. Pushing member; 1214. Through hole; 1215. Push rod; 1216. End; 1217. Elastic member;

[0033] 2. second support portion; 21. upper surface; 211. first target area; 212. second target area;

[0034] 3. Multistage centrifugal pump;

[0035] 4. Pump shaft;

[0036] A. First direction; B. Second direction. DETAILED DESCRIPTION

[0037] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0038] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0039] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0040] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Terms such as "including" or "comprising" mean that the elements before this term cover the elements listed after this term, and do not exclude the possibility of also covering other elements.

[0041] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0042] All terms used in the present disclosure have the same meanings as those understood by ordinary technical personnel in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0043] Technologies, methods and devices known to ordinary technical personnel in the relevant fields may not be discussed in detail, but in appropriate cases, the technologies, methods and devices should be regarded as part of the specification.

[0044] Embodiment 1

[0045] Such as Figure 1 , Figure 2 And Figure 3As shown, the present application provides a pump shaft mounting assembly 1, comprising a first supporting portion 11, a resisting portion 12 and a driving portion 13; the first supporting portion 11 is provided with a receiving groove 111, the receiving groove 111 extends along a horizontal first direction and can receive the pump shaft 4; the resisting portion 12 comprises two resisting components 121 relatively arranged on both sides of the receiving groove 111 in a horizontal second direction perpendicular to the first direction, the resisting components 121 are slidably arranged in the receiving groove 111 and can resist the pump shaft 4 on both sides of the second direction in the receiving groove 111; the driving portion 13 is arranged on the first supporting portion 11 and connected to the resisting component 121; wherein the driving portion 13 drives the resisting component 121 to displace along the first direction, and the resisting component 121 resists and drives the pump shaft 4 to displace along the first direction in the receiving groove 111.

[0046] Specifically, the first support portion 11 may be a frame structure or a box structure, etc. The first support portion 11 is provided with a receiving slot 111 extending in a first horizontal direction, and the receiving slot 111 can accommodate the pump shaft 4 therein and provide a guide limit in the first direction. According to the requirements, an auxiliary support plate or other structure may be provided in the receiving slot 111 to provide the required support point or limit point, so as to prevent the pump shaft 4 from unnecessary lateral displacement due to external force during the installation process, ensure the installation accuracy, and increase the stability of the pump shaft 4 in the receiving slot 111.

[0047] The abutment portion 12 includes two abutment components 121 disposed relatively on both sides of the accommodating slot 111 in a horizontal second direction perpendicular to the first direction. The two abutment components 121 are disposed relatively to form a group. The present application is not limited to one group of abutment components 121, and may also be a plurality of groups of abutment components 121. The two abutment components 121 can abut against both sides of the pump shaft 4 in the second direction to drive the pump shaft 4 to move in the accommodating slot 111 along the first direction. The resistance component 121 is slidably arranged in the accommodating groove 111, and a slide rail extending along the first direction can be arranged in the accommodating groove 111, which cooperates with the slider arranged in the resistance component 121 to realize the sliding connection in the first direction; a linear guide column can also be arranged on the side of the accommodating groove 111, and the resistance component 121 can realize the linear motion in the first direction by cooperating with the linear guide column through a linear bearing; a rack can also be arranged on the side of the accommodating groove 111, and the resistance component 121 can realize the linear motion in the first direction by cooperating with the gear and the rack; there is no specific limitation, as long as the resistance component 121 can be slidably connected with the accommodating groove 111, and the pump shaft 4 can be driven to move smoothly along the first direction under the drive of the driving part 13.

[0048] The structural form of the resistance component 121 can be a spring preloaded type, a pneumatic or hydraulic clamping type, an electromagnetic clamping type, etc., without limitation. By being relatively arranged on both sides of the accommodating groove 111 in the second direction, a horizontal force in the second direction is provided to achieve resistance to the pump shaft 4, and the pump shaft 4 can be driven by the driving part 13 to move smoothly along the first direction, so that the pump shaft 4 can be inserted into the multi-stage centrifugal pump 3, thereby achieving precise control of the insertion process and realizing rapid installation between the pump shaft 4 and the multi-stage centrifugal pump 3 after maintenance.

[0049] The driving part 13 is disposed on the first supporting part 11 and connected to the abutment component 121, so as to drive the abutment component 121 to move in the first direction, so that the abutment component 121 abuts against and drives the pump shaft 4 to move in the first direction in the accommodating groove 111, thereby inserting the pump shaft 4 into the multi-stage centrifugal pump 3. The driving part 13 can be a screw transmission structure, a linear guide rail and a ball screw structure, a hydraulic or pneumatic drive structure, a gear rack transmission structure, etc., which are not limited to specific ones, and can realize linear motion in the first direction, and can be driven to move synchronously in the first direction by connecting to the abutment component 121.

[0050] In a first aspect, the present application provides a pump shaft mounting assembly 1, comprising a first supporting portion 11, a resisting portion 12 and a driving portion 13; the first supporting portion 11 is provided with a receiving groove 111, the receiving groove 111 extends along a horizontal first direction and can receive a pump shaft 4; the resisting portion 12 comprises two resisting components 121 which are relatively arranged on both sides of the receiving groove 111 in a horizontal second direction perpendicular to the first direction, the resisting components 121 are slidably arranged in the receiving groove 111 and can resist both sides of the pump shaft 4 in the second direction in the receiving groove 111; the driving portion 13 is arranged on the first supporting portion 11 and is connected to the resisting component 121; wherein the driving portion 13 drives the resisting component 121 to displace along the first direction, and the resisting component 121 resists and drives the pump shaft 4 to displace along the first direction in the receiving groove 111. The first support portion 11 of the pump shaft installation assembly 1 of the present application can provide limited support for the pump shaft 4 that needs to be installed in the multistage centrifugal pump 3 through the setting of the accommodating groove 111, thereby ensuring the alignment installation accuracy of the pump shaft 4. At the same time, the abutment assembly 121 arranged on both sides of the pump shaft 4 in the second direction can abut the pump shaft 4, and can drive the pump shaft 4 to move smoothly along the first direction under the drive of the driving portion 13, thereby realizing the insertion of the pump shaft 4 into the multistage centrifugal pump 3. The present application has a simple structure and convenient operation, and the insertion process is accurately controlled by the abutment portion 12 and the driving portion 13, thereby realizing the rapid installation between the pump shaft 4 and the multistage centrifugal pump 3 after maintenance, thereby effectively improving the installation efficiency. Through the application of the present application, the problem that a simple auxiliary frame is often used for support when the multistage centrifugal pump 3 is repaired and disassembled, and the alignment operation between the central shaft and the pump body parts of the multistage centrifugal pump 3 is performed by manual pushing is solved, which is cumbersome to operate and has low installation accuracy and installation efficiency.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, two sliding slits 1111 are respectively opened along the first direction on both sides of the accommodating groove 111 in the second direction, and the resistance component 121 is slidably arranged in the sliding slits 1111 and the first end extends into the accommodating groove 111 to be able to resist the pump shaft 4.

[0052] Specifically, in order to provide precise guidance for the sliding of the resistance component 121, so that it resists and drives the pump shaft 4 to be accurately and stably installed in the multi-stage centrifugal pump 3 along the first direction, the present application has two sliding slits 1111 respectively opened along the first direction on both sides of the accommodating groove 111 in the second direction, so as to guide the sliding of the resistance component 121 through the sliding slits 1111, limit the movement direction of the resistance component 121, avoid deviation or rotation, and ensure the accuracy of the movement of the pump shaft 4 in the first direction. In addition, the setting of the sliding slits 1111 of the present application simplifies the overall structure of the pump shaft installation component 1, reduces the cost and maintenance difficulty while ensuring the accurate and stable installation effect.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the resistance component 121 includes: a resistance member 1211, a connecting member 1212 and a pushing member 1213; the resistance member 1211 is located at the first end of the resistance component 121; the connecting member 1212 is at least partially embedded in the sliding slot 1111 and connected to the driving part 13, and the connecting member 1212 is provided with a through hole 1214 extending along the second direction; the pushing member 1213 is located at the second end of the resistance component 121, and the pushing member 121 3 comprises a push rod 1215 and an end 1216. The outer edge size of the end 1216 is larger than that of the push rod 1215. The push rod 1215 is inserted into the through hole 1214 and connected to the abutment 1211. An elastic member 1217 sleeved on the push rod 1215 is arranged between one end of the end 1216 facing the push rod 1215 and one end of the connecting member 1212 away from the abutment 1211. The elastic member 1217 has a rebound force to make the abutment 1211 abut against the pump shaft 4.

[0054] Specifically, in order to be able to resist the pump shaft 4, so as to drive the pump shaft 4 to move smoothly along the first direction under the drive of the driving part 13, and realize the pump shaft 4 being inserted into the multi-stage centrifugal pump 3, the resistance component 121 of the present application includes a resistance member 1211, a connecting member 1212 and a pushing member 1213. The resistance member 1211 is located at the first end of the resistance component 121, so as to extend into the accommodating groove 111 to resist the pump shaft 4 in the accommodating groove 111. The resistance member 1211 can be a block structure with an arc groove, or an arc plate. The curvature of the arc groove or the arc plate is adaptively adjusted according to the outer diameter of the pump shaft 4 to be resisted, so as to fit the pump shaft 4 with a larger contact area to achieve a better resistance effect. The connecting member 1212 is at least partially embedded in the sliding slot 1111 and connected to the driving part 13, so as to guide the sliding of the resistance component 121 through the sliding slot 1111, limit the movement direction of the resistance component 121, avoid deviation or rotation, and ensure the accuracy of the movement of the pump shaft 4 in the first direction. The connecting member 1212 is connected to the driving part 13 to realize the overall movement drive of the resistance component 121 under the drive of the driving part 13.

[0055] In the present application, a pushing member 1213 is provided at the second end of the resistance component 121, and the pushing member 1213 includes a push rod 1215 and an end 1216. The outer edge size of the end 1216 is larger than the push rod 1215, so that the push rod 1215 can be sleeved between the end 1216 and the end of the connecting member 1212 away from the resistance member 1211 to set the elastic member 1217 and limit the elastic member 1217, so that the elastic member 1217 is in a compressed state between the end 1216 and the connecting member 1212, thereby providing a rebound force to be applied to the resistance member 1211, thereby achieving resistance to the pump shaft 4. In order to achieve the transmission of rebound force, the connecting member 1212 in the resistance component 121 of the present application is provided with a through hole 1214 extending along the second direction, and the push rod 1215 is passed through the through hole 1214 and connected to the resistance member 1211, thereby achieving a tight connection between the resistance member 1211, the connecting member 1212 and the pushing member 1213 in the resistance component 121, and the whole can be driven to move along the first direction.

[0056] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the outer edge size of the resistance member 1211 is larger than the outer edge size of the connecting member 1212 embedded in the sliding groove 1111, so that the first end of the resistance component 121 can be snapped into the accommodating groove 111.

[0057] Specifically, in order to ensure that the abutment assembly 121 provides stable abutment to the side of the pump shaft 4, so that the pump shaft 4 can be smoothly displaced along the first direction under the drive of the driving unit 13, the present application sets the outer edge size of the abutment member 1211 to be larger than the outer edge size of the connecting member 1212 embedded in the sliding slot 1111, so that after the abutment member 1211 enters the accommodating groove 111, it can avoid the phenomenon of slipping out of the sliding slot 1111, thereby improving the stability of the pump shaft installation assembly 1 during the overall working process. At the same time, the larger outer edge size of the abutment member 1211 can increase the contact area between the surface of the abutment member 1211 and the side of the pump shaft 4, increase the friction force, and ensure that under the action of the driving unit 13, the pump shaft 4 can be smoothly and accurately displaced along the first direction under the drive of the abutment assembly 121, thereby improving the installation accuracy and efficiency.

[0058] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the resisting member 1211 is arc-shaped, and the arc-shaped resisting member 1211 is bent away from the connecting member 1212 .

[0059] Specifically, the present application sets an arc-shaped resistance member 1211 so as to fit the outer surface of the cylindrical pump shaft 4 with a larger contact area, thereby increasing the friction between the resistance member 1211 and the pump shaft 4, improving the resistance stability of the pump shaft 4, so that the pump shaft 4 is always subjected to a stable force during the displacement process, and improving the installation accuracy and efficiency. In addition, the arc-shaped resistance member 1211 can reduce the wear of the resistance member 1211 on the pump shaft 4, and also improve the service life of the pump shaft installation assembly 1.

[0060] In some embodiments, a non-slip member is disposed on a surface of one side of the resisting member 1211 facing away from the connecting member 1212 .

[0061] Specifically, in order to further increase the friction between the resistance member 1211 and the pump shaft 4, the present application provides an anti-slip member on the surface of the side of the resistance member 1211 away from the connecting member 1212. The anti-slip member can be a soft material such as rubber or silicone to provide a larger friction coefficient; a tiny concave-convex structure can also be formed on the surface of the side of the resistance member 1211 away from the connecting member 1212 by sandblasting, grooving and other processes to improve the friction performance; an anti-slip coating such as epoxy resin, polyurethane, acrylic acid can also be coated on the surface of the side of the resistance member 1211 away from the connecting member 1212. There is no specific limit, which can further increase the friction between the resistance member 1211 and the pump shaft 4, so that the pump shaft 4 is always subjected to a stable force during the process of being driven to move, thereby improving the installation accuracy and efficiency.

[0062] like Figure 1As shown, in some embodiments, the driving part 13 includes: a driving motor 131, a screw 132 and a driving block 133; the driving motor 131 is arranged on the first supporting part 11; the screw 132 is arranged on the first supporting part 11 along the first direction and is connected to the output end of the driving motor 131; the driving block 133 is passed through the screw 132 and is connected to the connecting member 1212; wherein, the driving motor 131 drives the screw 132 to rotate, the driving block 133 drives the resistance assembly 121 to move along the first direction, and the pump shaft 4 is resisted by the resistance member 1211 and driven to move along the first direction.

[0063] Specifically, in order to achieve the driving of the resistance component 121, the resistance component 121 can be driven to move along the first direction through the resistance pump shaft 4. The driving part 13 of the present application includes a driving motor 131, a screw 132 and a driving block 133. The driving motor 131 is arranged on the first support part 11, and can be a stepping motor, a servo motor, etc., without limitation. The screw 132 is arranged on the first support part 11 along the first direction and connected to the output end of the driving motor 131. Through the cooperation of the driving motor 131 and the screw 132, the driving block 133 is passed through the screw 132 and connected to the connector 1212 in the resistance component 121, so that the position of the resistance component 121 can be accurately controlled, thereby achieving efficient positioning and displacement of the pump shaft 4, and ensuring the accuracy of the pump shaft 4 insertion process.

[0064] like Figure 1 As shown, in some embodiments, it also includes: a limit plate 14, which is arranged in the accommodating groove 111 and located at both ends of the accommodating groove 111 in the first direction, and the inner side of the limit plate 14 has an arc surface, and the arc surface can limit the pump shaft 4 in the second direction.

[0065] Specifically, the present application sets a limit plate 14 on the inner side of both ends of the accommodating groove 111 in the first direction, and limits the pump shaft 4 in the second direction through the curved surface on the inner side of the limit plate 14, so as to prevent the pump shaft 4 from unnecessary lateral displacement due to external force during the installation process, thereby ensuring the installation accuracy. The curved surface can fit tightly with the outer surface of the pump shaft 4, and provides additional support points for the accommodation of the pump shaft 4 in the accommodating groove 111, thereby increasing the stability of the pump shaft 4 in the accommodating groove 111.

[0066] like Figure 4 As shown, in some embodiments, the interference portion 12 includes four interference components 121 , the four interference components 121 are symmetrical in pairs along the second direction and spaced apart along the first direction, and the four interference components 121 are all slidably disposed in the accommodating groove 111 .

[0067] Specifically, in the present application, four abutting components 121 are provided to increase the number of abutting points on the pump shaft 4. At the same time, the four abutting components 121 are symmetric in pairs along the second direction and are spaced along the first direction, so that the pump shaft 4 is subjected to uniform abutting forces in all directions, improving the stability and safety during the process of the pump shaft 4 being driven to displace. Moreover, the increase in the number of the abutting components 121 also increases the contact area between the abutting member 1211 in the pump shaft mounting assembly 1 and the pump shaft 4, increases the frictional force between the abutting member 1211 and the pump shaft 4, improves the abutting stability of the pump shaft 4, enables the pump shaft 4 to always be subjected to a stable acting force during the process of being driven to displace, and improves the installation accuracy and efficiency. The abutting components 121 are symmetric in pairs, and the two abutting components 121 spaced in the first direction have the same movement stroke when driving the pump shaft 4 to move along the first direction. In the present application, the spacing distance between the abutting components 121 in the first direction is adaptively adjusted according to the actual size of the pump shaft 4 in the required installation and maintenance scenarios, and is not specifically limited.

[0068] Embodiment Two

[0069] As Figure 5 shown, in the second aspect of the present application, a multi-stage centrifugal pump maintenance device is provided, including a second support portion 2 and a pump shaft mounting assembly 1; the upper surface 21 of the second support portion 2 has a first target area 211, and the first target area 211 can support the multi-stage centrifugal pump 3; the pump shaft mounting assembly 1 is disposed in a second target area 212 that is spaced from the first target area 211 along the first direction on the upper surface 21.

[0070] Specifically, for the specific structure of the pump shaft mounting assembly 1, please refer to Embodiment One, which will not be elaborated here. The second support portion 2 can be a support plate structure or a support frame structure, which is not specifically limited. The upper edge of the second support portion 2 has a first target area 211 to enable the connection of the communicating pipe of the multi-stage centrifugal pump 3 by setting structures such as pipe or jack holes in the first target area 211. The pump shaft mounting assembly 1 is disposed in a second target area 212 that is spaced from the first target area 211 along the first direction on the upper surface 21. The second target area 212 is spaced from the first target area 211, so that the pump shaft mounting assembly 1 can avoid colliding with the multi-stage centrifugal pump 3, and at the same time, it also provides an operating space for the installation and placement of the pump shaft 4. A receiving through groove 111 extending along the first direction is provided in the first support portion 11 of the pump shaft mounting assembly 1 to realize the operation of inserting the pump shaft 4 into the multi-stage centrifugal pump 3 in alignment along the first direction.

[0071] A second aspect of the present application provides a multi-stage centrifugal pump maintenance device, comprising a second support portion 2 and a pump shaft mounting assembly 1; the upper surface 21 of the second support portion 2 has a first target area 211, and the first target area 211 can support the multi-stage centrifugal pump 3; the pump shaft mounting assembly 1 is arranged on a second target area 212 of the upper surface 21 along a first direction and spaced from the first target area 211. The pump shaft mounting assembly 1 includes a first supporting portion 11, a resisting portion 12 and a driving portion 13; the first supporting portion 11 is provided with a receiving groove 111, the receiving groove 111 extends along a horizontal first direction and can receive the pump shaft 4; the resisting portion 12 includes two resisting components 121 relatively arranged on both sides of the receiving groove 111 in a horizontal second direction perpendicular to the first direction, the resisting components 121 are slidably arranged in the receiving groove 111 and can resist the pump shaft 4 on both sides of the second direction in the receiving groove 111; the driving portion 13 is arranged on the first supporting portion 11 and connected to the resisting component 121; wherein the driving portion 13 drives the resisting component 121 to displace along the first direction, and the resisting component 121 resists and drives the pump shaft 4 to displace along the first direction in the receiving groove 111. The first support portion 11 of the pump shaft installation assembly 1 of the present application can provide limited support for the pump shaft 4 that needs to be installed in the multistage centrifugal pump 3 through the setting of the accommodating groove 111, thereby ensuring the alignment installation accuracy of the pump shaft 4. At the same time, the abutment assembly 121 arranged on both sides of the pump shaft 4 in the second direction can abut the pump shaft 4, and can drive the pump shaft 4 to move smoothly along the first direction under the drive of the driving portion 13, thereby realizing the insertion of the pump shaft 4 into the multistage centrifugal pump 3. The present application has a simple structure and convenient operation, and the insertion process is accurately controlled by the abutment portion 12 and the driving portion 13, thereby realizing the rapid installation between the pump shaft 4 and the multistage centrifugal pump 3 after maintenance, thereby effectively improving the installation efficiency. Through the application of the present application, the problem that a simple auxiliary frame is often used for support when the multistage centrifugal pump 3 is repaired and disassembled, and the alignment operation between the central shaft and the pump body parts of the multistage centrifugal pump 3 is performed by manual pushing is solved, which is cumbersome to operate and has low installation accuracy and installation efficiency.

[0072] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0073] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A pump shaft mounting assembly, characterized in that, include: A first support portion (11), wherein the first support portion (11) is provided with a receiving groove (111), wherein the receiving groove (111) extends along a first horizontal direction (A) and is capable of receiving a pump shaft (4); A resistance portion (12), the resistance portion (12) comprising two resistance components (121) arranged on both sides of the accommodating groove (111) in a horizontal second direction (B) perpendicular to the first direction (A), the resistance components (121) being slidably arranged in the accommodating groove (111) and being capable of resisting both sides of the pump shaft (4) in the second direction (B) in the accommodating groove (111); A driving portion (13), the driving portion (13) being disposed on the first supporting portion (11) and connected to the abutting component (121); The driving part (13) drives the abutment component (121) to move along the first direction (A), and the abutment component (121) abuts against and drives the pump shaft (4) to move along the first direction (A) in the accommodating groove (111).

2. The pump shaft mounting assembly according to claim 1, characterized in that: The accommodating groove (111) has two sliding slits (1111) respectively formed along the first direction (A) on both sides in the second direction (B); the abutment component (121) is slidably arranged in the sliding slits (1111) and the first end extends into the accommodating groove (111) so as to abut against the pump shaft (4).

3. The pump shaft mounting assembly according to claim 2, characterized in that, The interference component (121) comprises: A resistance member (1211), the resistance member (1211) being located at the first end of the resistance component (121); a connecting member (1212), the connecting member (1212) being at least partially embedded in the sliding slit (1111) and connected to the driving portion (13), the connecting member (1212) being provided with a through hole (1214) extending along the second direction (B); A pushing member (1213), the pushing member (1213) is located at the second end of the resistance component (121), the pushing member (1213) comprises a push rod (1215) and an end head (1216), the outer edge size of the end head (1216) is larger than that of the push rod (1215), the push rod (1215) is passed through the through hole (1214) and connected to the resistance member (1211), an elastic member (1217) sleeved on the push rod (1215) is arranged between one end of the end head (1216) facing the push rod (1215) and one end of the connecting member (1212) facing away from the resistance member (1211), the elastic member (1217) has a rebound force to make the resistance member (1211) resist the pump shaft (4).

4. The pump shaft mounting assembly according to claim 3, characterized in that: The outer edge size of the abutment member (1211) is larger than the outer edge size of the connection member (1212) embedded in the sliding slot (1111), so that the first end of the abutment component (121) can be snap-fitted into the accommodating through groove (111).

5. The pump shaft mounting assembly according to claim 4, characterized in that: The resisting member (1211) is arc-shaped, and the arc-shaped resisting member (1211) is bent away from the connecting member (1212).

6. The pump shaft mounting assembly according to claim 5, characterized in that: A non-slip part is provided on the surface of one side of the resisting member (1211) facing away from the connecting member (1212).

7. The pump shaft mounting assembly according to any one of claims 3-6, characterized in that The driving unit (13) comprises: a driving motor (131), wherein the driving motor (131) is arranged on the first supporting portion (11); a screw rod (132), the screw rod (132) being arranged on the first supporting portion (11) along the first direction (A) and being connected to an output end of the driving motor (131); A driving block (133), the driving block (133) is passed through the screw rod (132) and connected to the connecting member (1212); The driving motor (131) drives the screw rod (132) to rotate, the driving block (133) drives the abutment assembly (121) to move along the first direction (A), and the pump shaft (4) is abutted by the abutment member (1211) and driven to move along the first direction (A).

8. The pump shaft mounting assembly according to claim 1, characterized in that, Also includes: A limit plate (14), the limit plate (14) being arranged in the accommodating groove (111) and being located at both ends of the accommodating groove (111) in the first direction (A), the inner side of the limit plate (14) having an arc surface, and the arc surface being capable of limiting the position of the pump shaft (4) in the second direction (B).

9. The pump shaft mounting assembly according to claim 1, characterized in that: The abutment portion (12) comprises four abutment components (121), the four abutment components (121) are symmetrical in pairs along the second direction (B) and are arranged at intervals along the first direction (A), and the four abutment components (121) are all slidably arranged in the accommodating through groove (111).

10. A maintenance device for a multistage centrifugal pump, characterized in that, include: A second support portion (2), the upper surface (21) of the second support portion (2) having a first target area (211), the first target area (211) being capable of supporting a multi-stage centrifugal pump (3); The pump shaft mounting assembly (1) according to any one of claims 1 to 9, wherein the pump shaft mounting assembly (1) is arranged in a second target area (212) of the upper surface (21) and is spaced from the first target area (211) along a first direction (A).

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