Blade connection structure for submersible pump, detachable impeller and blade disassembly method

Abstract

The present application provides a blade connection structure for a submersible oil pump, a detachable impeller, and a blade disassembly method, wherein the blade connection structure includes a mounting groove, a connecting piece, an alignment pin, and a docking rod; the mounting groove is provided on the outer peripheral wall of the impeller body, and a guide groove is provided on the inner wall of the mounting groove; the connecting piece is inserted into the guide groove and is connected to the impeller body through a locking structure; the connecting groove is provided with a threaded groove and a through hole connecting the threaded groove and the guide groove; the alignment pin is inserted into the through hole, and an elastic piece is provided between the connecting piece and the connecting piece; the docking rod is threadedly connected to the threaded groove, and the docking rod is also connected to the blade, so that the blade is fixed to the impeller body through the connecting piece; wherein the docking rod can be separated from the connecting piece to realize the individual disassembly of the corresponding blade. The blade connection structure for a submersible oil pump, the detachable impeller, and the blade disassembly method provided by the present application can realize the individual disassembly of the blades on the impeller body to ensure the normal use of the submersible oil pump.

Description

Technical Field

[0001] The present application belongs to the technical field of submersible pumps, and specifically relates to a blade connection structure for a submersible pump and a blade disassembly method. Background Art

[0002] The impeller is a key component of a submersible oil pump, altering the direction and velocity of fluid flow within the pump to improve its efficiency and performance. In practice, submersible oil pumps are often used in harsh environments such as oil production. Therefore, the impeller must possess excellent corrosion and wear resistance. Common impeller materials include high-nickel cast iron, which effectively resists corrosion and wear in well fluids, extending the impeller's service life.

[0003] A common impeller includes a guide housing fixedly arranged in the flow channel, and an impeller rotatably arranged in the flow channel and used in conjunction with the guide housing; wherein, the impeller has a plurality of blades arranged around it, and compared with other components, the service life of the blades is shorter, so regular inspection, repair and maintenance of the blades is a necessary condition to ensure the long-term normal use of the submersible oil pump.

[0004] The inventors found that in the existing technology, when the blades are damaged, the entire impeller needs to be dismantled and a new impeller needs to be installed on the main shaft; wherein, disassembling and assembling the impeller takes a lot of time, and the dismantled impeller is not convenient for replacing the blades, which affects the normal use of the submersible pump and causes technical problems that make subsequent operations difficult. Summary of the Invention

[0005] The embodiments of the present application provide a blade connection structure and a blade disassembly method for a submersible oil pump, which are intended to achieve individual disassembly of the blades to ensure the normal use of the submersible oil pump.

[0006] To achieve the above objectives, the technical solution adopted in this application is:

[0007] Provided is a blade connection structure for a submersible pump, comprising:

[0008] A mounting groove is provided on the outer peripheral wall of the impeller body and extends toward the central axis of the impeller body; and a guide groove extending along the axial direction thereof is further provided on the inner wall of the mounting groove;

[0009] a connecting member, adapted to be slidably inserted into the mounting groove and connected to the impeller body via a locking structure; a threaded groove is formed on the outer end surface of the connecting member, and a through hole is formed on the inner wall of the threaded groove, penetrating the outer circumference of the connecting member and adapted to communicate with the guide groove;

[0010] An alignment pin is slidably inserted into the through hole and has an elastic member between the alignment pin and the connecting member, so that the elastic member drives the alignment pin to move out of the thread groove and into the guide groove; when the alignment pin moves to abut the end wall of the guide groove away from the bottom of the installation groove, the alignment pin is adapted to move toward the thread groove and cause the elastic member to undergo elastic deformation; and

[0011] a docking rod adapted to be threadedly connected to the thread groove, and used to close the through hole to restrict the movement of the alignment pin toward the thread groove, or to avoid the through hole so that the alignment pin can be inserted into the thread groove; an end of the docking rod away from the bottom of the thread groove is used to be connected to the blade, and when the docking rod is threadedly connected to the thread groove, the blade can abut against the outer end surface of the connecting member;

[0012] When the connecting member moves toward the outside of the installation groove until the alignment pin abuts against the end wall of the guide groove, the corresponding blade moves to a position to avoid the adjacent blade, so that the blade can rotate around the docking rod as the axis.

[0013] In a possible implementation, a sinking groove coaxially connected to the through hole is provided on the outer circumferential surface of the connecting member, and the alignment pin includes:

[0014] A pin portion is slidably inserted into the through hole, and an end surface of the pin portion close to one end of the thread groove adopts an arc surface structure adapted to the inner peripheral wall of the thread groove; and

[0015] An end portion is fixedly connected to an end of the pin portion away from the threaded groove and is suitable for being embedded in the sinking groove;

[0016] Wherein, when the end portion is embedded in the sinking groove, part of the pin shaft portion is inserted into the thread groove, and the elastic member elastically stores energy;

[0017] When the end portion exits the sinking groove and is embedded in the guide groove, the pin shaft portion is adapted to avoid the inner space of the thread groove, and the elastic member is in an energy storage state or a natural state.

[0018] In a possible implementation, the elastic member is a spring sleeved on the pin shaft portion, with two ends respectively abutting against the end portion and the bottom of the sinking groove;

[0019] Wherein, when the end portion is embedded in the sinking groove, the spring is in a compressed state, and a portion of the pin shaft portion is inserted into the threaded groove;

[0020] When the end portion exits the sinking groove and is inserted into the guide groove, the spring is in a natural state or a compressed state, and the pin shaft portion is adapted to avoid the inner space of the thread groove.

[0021] In one possible implementation, the side surface of the end portion facing the outer end surface of the connecting piece adopts an inclined surface, and / or the end wall of the guide groove away from the bottom of the installation groove adopts an inclined surface, so that when the end portion abuts the end wall of the guide groove away from the bottom of the installation groove, the end portion can move toward the bottom of the sinking groove.

[0022] In a possible implementation, the locking structure includes:

[0023] a first positioning hole, configured to be opened on the impeller body; the first positioning hole passes through the impeller body in a thickness direction and is in communication with the mounting groove;

[0024] a second positioning hole, formed on the connecting member; when the connecting member is inserted into the mounting slot, the second positioning hole is adapted to be coaxially connected to the first positioning hole; and

[0025] The locking rod is suitable for being inserted into the first positioning hole and the second positioning hole that are connected to each other, and its two ends extend to both sides of the impeller body respectively; both ends of the locking rod are detachably connected to an abutment portion, and the two abutment portions are used to abut the outer side surface of the impeller body to limit the movement of the locking rod relative to the impeller body.

[0026] In a possible implementation, the blade connection structure further includes:

[0027] a slot, formed on the blade and located on a side of the blade facing the impeller body; and

[0028] a reinforcing rod, used for being fixedly connected to the outer peripheral wall of the impeller body and for being inserted into the slot and abutting against the bottom of the slot;

[0029] Wherein, when the connecting member moves toward the outside of the installation slot until the alignment pin abuts against the end wall of the guide slot, the reinforcing rod is located outside the slot.

[0030] In a possible implementation, the connector further includes:

[0031] a rubber pad fixedly connected to the outer end surface of the connecting piece, and having an avoidance hole connected to the threaded groove; the rubber pad is made of elastic rubber material so that when the blade is connected to the rubber pad and the blade rotates about the docking rod as the axis, the rubber pad can be deformed;

[0032] Among them, the side of the rubber pad facing away from the connecting piece adopts an arc surface structure adapted to the outer peripheral surface of the impeller body, so that when the locking structure connects the connecting piece and the impeller body, the rubber pad is suitable for filling the gap between the open end of the mounting groove and the connecting piece.

[0033] In an embodiment of the present application, the blades are connected to the outer end surface of the connecting piece by threading the docking rod to the thread groove; at the same time, the impeller body and the connecting piece are connected by a locking structure, so that the blades are fixed to the impeller body through the connecting piece.

[0034] When the blade needs to be removed, the connection relationship of the locking structure can be released first, and the connecting piece can be pulled outward until the alignment pin abuts the end wall of the mounting groove. Then, the blade can be rotated with the docking rod as the axis, so that the docking rod is rotated toward the outside of the mounting groove along the axial direction of the thread groove until the docking rod and the connecting piece are separated, thereby achieving the purpose of separating the blade from the impeller body; wherein, when the docking rod is rotated into the avoidance through hole, the blade can be continued to be pulled outward, so that the alignment pin moves toward the thread groove to exit the guide groove, so that the connecting piece can move toward the outside of the mounting groove to disengage from the mounting groove, so as to realize the technical means of separating the docking rod and the connecting piece.

[0035] Compared with the prior art, the blade connection structure for the submersible oil pump provided in this embodiment can realize the separate disassembly of the blades on the impeller body, eliminating the operation steps of removing the impeller, thereby improving the maintenance efficiency of the submersible oil pump and ensuring the normal use of the submersible oil pump.

[0036] The technical solution adopted in the present application also provides a detachable impeller for a submersible pump, comprising the blade connection structure proposed in any of the aforementioned items.

[0037] The beneficial effects of the detachable impeller for a submersible pump provided in this embodiment are the same as those of the aforementioned blade connection structure, and will not be repeated here.

[0038] The technical solution adopted in the present application also provides a method for disassembling blades for a submersible pump, based on the detachable impeller proposed in any of the above items, wherein the detachable impeller includes a first blade connection structure acting on blade A, a second blade connection structure acting on blade B, and a third blade connection structure acting on blade C; wherein blade A is located between blade B and blade C;

[0039] The blade disassembly method comprises the following steps:

[0040] A. releasing the locking structure in the first blade connection structure so that the corresponding connecting member can move axially along the mounting groove;

[0041] B. Pull blade A outward, causing the corresponding connecting member to move synchronously until the alignment pin abuts against the end of the guide groove away from the bottom of the mounting groove, so that blade A is located outside blades B and C;

[0042] C. Rotating blade A around the corresponding docking rod until the docking rod moves to a position that avoids the through hole; during this process, the movement trajectory of blade A avoids blades B and C;

[0043] D. Rotate the blade A with the corresponding docking rod as the axis, so that the docking rod exits the thread groove, thereby separating the blade A from the connecting member and the blade A from the impeller body.

[0044] In a possible implementation, after step C is completed, the blade A is pulled outward so that the alignment pin moves toward the thread groove and exits the guide groove, and the connecting member exits the installation groove.

[0045] The beneficial effects of the submersible pump blade disassembly method provided in this embodiment are the same as those of the aforementioned blade connection structure, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0047] Figure 1 A schematic diagram of the three-dimensional structure of the blade connection structure provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of the exploded structure of the blade connection structure provided in an embodiment of the present application;

[0049] Figure 3 A schematic cross-sectional view of a blade connection structure provided in an embodiment of the present application;

[0050] Figure 4 This is a schematic diagram of the combined structure of the docking rod and blades used in the embodiment of the present application;

[0051] Figure 5 A schematic diagram of the structure of the mounting slot and related structures used in the embodiment of the present application;

[0052] Figure 6 This is a schematic diagram of the exploded structure of the locking structure used in the embodiment of the present application in a cross-sectional perspective;

[0053] Figure 7 A schematic diagram of the three-dimensional structure of the connector and rubber pad used in the embodiment of the present application from an exploded perspective;

[0054] Figure 8 A schematic cross-sectional view of a connector used in an embodiment of the present application;

[0055] Figure 9 This is a schematic diagram of the three-dimensional structure of the alignment pin and the elastic member used in the embodiment of the present application from an exploded perspective;

[0056] Figure 10 A schematic diagram of the three-dimensional structure of a detachable impeller provided in an embodiment of the present application;

[0057] Explanation of the accompanying drawings: 1. Mounting groove; 11. Guide groove; 2. Connecting piece; 21. Threaded groove; 22. Through hole; 23. Sunken groove; 3. Alignment pin; 31. Pin shaft portion; 311. Elastic member; 32. End portion; 4. Docking rod; 5. Locking structure; 51. First positioning hole; 52. Second positioning hole; 53. Locking rod; 531. Abutment portion; 6. Slot; 7. Reinforcement rod; 8. Rubber pad; 81. Avoidance hole; 100. Impeller body. DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0059] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0060] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 a limitation on this application.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0062] Please also refer to Figures 1 to 10 The blade connection structure for a submersible pump provided by the present application is now described. The blade connection structure for a submersible pump provided by the present application comprises a mounting groove 1, a connecting member 2, an alignment pin 3 and a docking rod 4.

[0063] The mounting groove 1 is defined on the outer circumferential wall of the impeller body 100 and extends toward the central axis of the impeller body 100. In this embodiment, for ease of description, the direction from the outer circumference of the impeller body 100 toward the central axis of the impeller body 100 is defined as the direction from the outside to the inside. Furthermore, a guide groove 11 is defined on the inner wall of the mounting groove 1, extending along its axial direction.

[0064] The connector 2 has a structure that matches the mounting groove 1 and is connected to the impeller body 100 via a locking structure 5. Specifically, the mounting groove 1 and the connector 2 have the same cross-sectional shape, so that when the connector 2 is slidably inserted into the mounting groove 1 and abuts the inner bottom surface of the mounting groove 1, the locking structure 5 can connect the impeller body 100 and the connector 2, while ensuring that no gap is formed between the connector 2 and the inner wall of the mounting groove 1 through which liquid can pass.

[0065] A threaded groove 21 is formed on the outer end surface of the connecting member 2 (the end surface facing away from the bottom of the mounting groove 1), and a through hole 22 is formed on the inner wall of the threaded groove 21 and passes through the outer peripheral surface of the connecting member 2 in a straight line direction (perpendicular to the axial direction of the threaded groove 21); when the connecting member 2 is inserted into the mounting groove 1 and the locking structure 5 connects the impeller body 100 and the connecting member 2, the through hole 22 is also suitable for communicating with the guide groove 11.

[0066] It should be noted that the through hole 22 is arranged to avoid the internal thread structure of the thread groove 21 .

[0067] The alignment pin 3 is slidably inserted into the through hole 22 , and an elastic member 311 is disposed between the alignment pin 3 and the connecting member 2 .

[0068] In actual use, the elastic member 311 can drive the alignment pin 3 to move to exit the thread groove 21 and insert into the guide groove 11; and, when the alignment pin 3 moves to abut the end wall of the guide groove 11 away from the bottom of the installation groove 1, if the connecting member 2 continues to move outward, this alignment pin 3 can move toward the thread groove 21 to exit the guide groove 11, and at this time the elastic member 311 undergoes elastic deformation to store energy.

[0069] In this embodiment, there are two guide grooves 11, which are respectively located on the inner walls on both sides of the mounting groove 1 in the up and down directions; accordingly, there are also two through holes 22, and the two through holes 22 correspond to the two aforementioned guide grooves 11 and are suitable for being connected respectively; and there are two alignment pins 3, and the two alignment pins 3 are respectively inserted into the two aforementioned through holes 22, so that when they act on the stopping process of the connecting member 2 being pulled out, a more balanced effect is achieved.

[0070] An external thread structure is provided on the outer peripheral wall of the docking rod 4, so that the docking rod 4 is suitable for being inserted into the thread groove 21 and being threadedly connected with the thread groove 21, thereby being used to close the through hole 22, thereby achieving the technical purpose of limiting the movement of the alignment pin 3 toward the thread groove 21, or being used to avoid the through hole 22, thereby achieving the technical purpose of enabling the alignment pin 3 to be inserted into the thread groove 21.

[0071] The end of the docking rod 4 away from the bottom of the thread groove 21 is used to connect with the blade, and when the docking rod 4 is threadedly connected to the thread groove 21, the blade can abut against the outer end surface of the connecting member 2; that is, the inner side surface of the blade and the outer end surface of the connecting member 2 both adopt an arc surface with the same curvature as the outer peripheral surface of the impeller body 100.

[0072] By presetting the length of the guide groove 11, the following technical purpose can be achieved: when the connecting member 2 moves toward the outside of the installation groove 1 until the alignment pin 3 abuts the end wall of the guide groove 11, the corresponding blade can move to a position to avoid the adjacent blade so that the blade can rotate around the docking rod 4 as the axis.

[0073] In the embodiment of the present application, the blade is connected to the outer end surface of the connecting member 2 by threading the docking rod 4 with the thread groove 21; at the same time, the impeller body 100 and the connecting member 2 are connected by the locking structure 5, so that the blade is fixed to the impeller body 100 through the connecting member 2.

[0074] When the blade needs to be removed, the connection relationship of the locking structure 5 can be released first, and the connecting piece 2 can be pulled outward until the alignment pin 3 abuts the end wall of the mounting groove 1. Then, the blade can be rotated with the docking rod 4 as the axis, so that the docking rod 4 is screwed in along the axial direction of the thread groove 21 toward the outside of the mounting groove 1 until the docking rod 4 and the connecting piece 2 are separated, thereby achieving the purpose of separating the blade from the impeller body 100; wherein, when the docking rod 4 is screwed in to the avoidance through hole 22, the blade can continue to be pulled outward, so that the alignment pin 3 moves toward the thread groove 21 to exit the guide groove 11, so that the connecting piece 2 can move toward the outside of the mounting groove 1 to disengage from the mounting groove 1, so as to realize the technical means of separating the docking rod 4 and the connecting piece 2.

[0075] It should be noted that the reason why the connecting member 2 is not designed to be a directly withdrawable structure is that in most cases, the impeller body 100 only needs to replace the blades, and the connecting member 2 thereon does not need to be replaced; based on this situation, the aforementioned technical solution uses the opportunity of "the alignment pin 3 abutting the end wall of the guide groove 11" to provide the operator with a (successful positioning) signal, which facilitates the start of twisting the blades (to achieve the separation of the docking rod 4 and the threaded groove 21).

[0076] Moreover, the connecting member 2 and the bottom of the guide groove 11 can be connected together by a metal wire; when the connecting member 2 has not exited the guide groove 11, the metal wire remains intact so as to be able to exert a pulling force on the connecting member 2 to prevent it from leaving the guide groove 11 and toward the bottom of the guide groove 11; and after the connecting member 2 exits the guide groove 11, the metal wire is destroyed, which makes it easier for operators to judge the usage status and condition of this product.

[0077] Compared with the prior art, the blade connection structure for the submersible pump provided in this embodiment can realize the separate disassembly of the blades on the impeller body 100, eliminating the operation steps of removing the impeller, thereby improving the maintenance efficiency of the submersible pump and ensuring the normal use of the submersible pump.

[0078] In some embodiments, as Figure 3 、 Figure 8 and Figure 9 As shown, a sinking groove 23 coaxially connected to the through hole 22 is provided on the outer peripheral surface of the connecting member 2, and the aforementioned alignment pin 3 includes a pin shaft portion 31 and an end portion 32.

[0079] The pin shaft portion 31 is slidably inserted in the through hole 22, and the end face of the pin shaft portion 31 close to one end of the thread groove 21 adopts an arc surface structure adapted to the inner peripheral wall of the thread groove 21, so that when the docking rod 4 is inserted into the thread groove 21 and the through hole 22 is closed, the pin shaft portion 31 can form surface contact with the outer peripheral surface of the docking rod 4, thereby avoiding the pin shaft portion 31 interfering with the rotation of the docking rod 4.

[0080] The end portion 32 is fixedly connected to an end of the pin portion 31 away from the thread groove 21 , and is suitable for being embedded in the sinking groove 23 or in the guide groove 11 .

[0081] Specifically, when the end portion 32 is embedded in the sinking groove 23, part of the pin shaft portion 31 is inserted into the thread groove 21, and the elastic member 311 elastically stores energy; when the end portion 32 withdraws from the sinking groove 23 and is embedded in the guide groove 11, the pin shaft portion 31 is suitable for avoiding the internal space of the thread groove 21, and the elastic member 311 is in an energy storage state or a natural state.

[0082] In some embodiments, as Figure 3 、 Figure 8 and Figure 9As shown, the elastic member 311 is a spring which is sleeved on the pin shaft portion 31 and has two ends respectively abutting against the end portion 32 and the bottom of the sinking groove 23 .

[0083] When the end portion 32 is inserted into the sinking groove 23 , the spring is in a compressed state, and a portion of the pin portion 31 is inserted into the threaded groove 21 .

[0084] When the end portion 32 exits the sinking groove 23 and is embedded in the guide groove 11, the spring is in a natural state or a compressed state. Specifically: when the end portion 32 partially exits the sinking groove 23 and is partially in the sinking groove 23, the spring is in a compressed state; when the end portion 32 completely exits the sinking groove 23 and abuts the bottom of the guide groove 11, the spring is in a natural state, and the pin shaft portion 31 is suitable for avoiding the internal space setting of the threaded groove 21, so that the docking rod 4 can be smoothly screwed in and close the through hole 22.

[0085] Regarding the cooperation between the end portion 32 and the guide groove 11, the following three embodiments are included:

[0086] In the first embodiment, as Figure 3 As shown, the side surface of the end portion 32 facing the outer end surface of the connecting member 2 adopts an inclined surface so that when the end portion 32 abuts the end wall of the guide groove 11 away from the bottom of the installation groove 1, the end portion 32 can move toward the bottom of the sinking groove 23.

[0087] In the second embodiment, as Figure 3 As shown, the end wall of the guide groove 11 away from the bottom of the installation groove 1 adopts an inclined surface, so that when the end head 32 abuts the end wall of the guide groove 11 away from the bottom of the installation groove 1, the end head 32 can move toward the bottom of the sinking groove 23.

[0088] In the third embodiment, Figure 3 As shown, the side surface of the end head portion 32 facing the outer end surface of the connecting member 2 adopts an inclined surface, and the end wall of the guide groove 11 away from the bottom of the installation groove 1 adopts an inclined surface, so that when the end head portion 32 abuts the end wall of the guide groove 11 away from the bottom of the installation groove 1, the end head portion 32 can move toward the bottom of the sinking groove 23.

[0089] By adopting the above technical solution, compared with the contact between planes, both the contact between planes and inclined surfaces and the contact between inclined surfaces have stronger guiding properties, so that the process of the end head 32 exiting the guide groove 11 is smooth and more convenient for manual operation.

[0090] In some embodiments, as Figure 2 and Figure 6 As shown, the locking structure 5 includes a first positioning hole 51 , a second positioning hole 52 and a locking rod 53 .

[0091] The first positioning hole 51 is used to be opened on the impeller body 100 . The first positioning hole 51 passes through the impeller body 100 along the thickness direction and is communicated with the aforementioned mounting groove 1 .

[0092] The second positioning hole 52 is formed on the connecting member 2 ; when the connecting member 2 is inserted into the mounting groove 1 and the locking structure 5 connects the impeller body 100 and the connecting member 2 , the second positioning hole 52 is coaxially connected to the first positioning hole 51 .

[0093] The locking rod 53 is suitable for being inserted into the first positioning hole 51 and the second positioning hole 52 which are connected to each other, and its two ends extend to the two sides of the impeller body 100 respectively; an abutment portion 531 is detachably connected to both ends of the locking rod 53, and the two abutment portions 531 are both used to abut the outer side surface of the impeller body 100 to limit the movement of the locking rod 53 relative to the impeller body 100.

[0094] In this embodiment, the end of the locking rod 53 has an external thread structure, and the abutting portion 531 is a nut adapted to the external thread structure so that the locking rod 53 and the abutting portion 531 are threadedly connected.

[0095] In some embodiments, as Figure 2 and Figure 4 As shown, the blade connection structure further includes a slot 6 and a reinforcing rod 7 .

[0096] The slot 6 is formed on the blade and is located on a side of the blade facing the impeller body 100 .

[0097] The reinforcing rod 7 is used to be fixedly connected to the outer peripheral wall of the impeller body 100 , and its extending direction is parallel to the direction of the mounting groove 1 , so as to be inserted into the slot 6 until it abuts against the bottom of the slot 6 .

[0098] By adopting the above technical solution, when the connecting member 2 moves toward the outside of the mounting groove 1 until the alignment pin 3 abuts the end wall of the guide groove 11, the reinforcing rod 7 is located on the outside of the slot 6 to facilitate the rotation of the blade; when the reinforcing rod 7 is inserted into the inside of the slot 6, the reinforcing rod 7 can enhance the stability of the combined structure of the blade and the impeller body 100.

[0099] It should be noted that, also for the purpose of strengthening the structure, holes may be opened on the impeller body 100, rib structures that can be inserted into the holes may be installed on the blades, or a raised frame structure may be pre-installed on the impeller body 100.

[0100] In some embodiments, as Figure 2 and Figure 7 As shown, the connecting member 2 further includes a rubber pad 8 .

[0101] The rubber pad 8 is fixedly connected to the outer end surface of the connecting member 2, and an avoidance hole 81 connected to the threaded groove 21 is opened on the rubber pad 8; the rubber pad 8 is made of elastic rubber material and is usually connected to the connecting member 2 by gluing, so that when the blade is connected to the rubber pad 8 and the blade rotates with the docking rod 4 as the axis, the rubber pad 8 can be deformed, thereby avoiding the rotation trajectory of the blade toward the side (arc surface) of the impeller body 100, avoiding structural damage caused by hard contact.

[0102] In addition, the side of the rubber pad 8 facing away from the connecting piece 2 adopts an arc surface structure that is compatible with the outer peripheral surface of the impeller body 100, so that when the locking structure 5 connects the connecting piece 2 and the impeller body 100, the rubber pad 8 is suitable for filling the gap between the open end of the mounting groove 1 and the connecting piece 2, thereby preventing liquid from entering and causing rust or even corrosion of the components, thereby improving the stability and service life of this product in actual use.

[0103] Based on the same inventive concept, an embodiment of the present application also provides a detachable impeller for a submersible pump, comprising the blade connection structure proposed in any one of the aforementioned items.

[0104] The beneficial effects of the detachable impeller for a submersible pump provided in this embodiment are the same as those of the aforementioned blade connection structure, and will not be repeated here.

[0105] The technical solution adopted in the present application also provides a method for disassembling blades for a submersible pump, based on the detachable impeller proposed in any of the above items, wherein the detachable impeller includes a first blade connection structure acting on blade A, a second blade connection structure acting on blade B, and a third blade connection structure acting on blade C; wherein blade A is located between blade B and blade C;

[0106] The blade disassembly method comprises the following steps:

[0107] A. releasing the locking structure 5 in the first blade connection structure so that the corresponding connecting member 2 can move axially along the mounting groove 1;

[0108] B. Pull blade A outward, causing the corresponding connecting member 2 to move synchronously until the alignment pin 3 abuts against the end of the guide groove 11 away from the bottom of the mounting groove 1, so that blade A is located outside blades B and C;

[0109] C. Rotate blade A around the corresponding docking rod 4 until the docking rod 4 moves to a position that avoids the through hole 22; during this process, the movement trajectory of blade A avoids blades B and C;

[0110] D. Rotate the blade A with the corresponding docking rod 4 as the axis, so that the docking rod 4 exits the thread groove 21 , thereby separating the blade A from the connecting member 2 and the blade A from the impeller body 100 .

[0111] The beneficial effects of the submersible pump blade disassembly method provided in this embodiment are the same as those of the aforementioned blade connection structure, and will not be repeated here.

[0112] In some embodiments, after step C is completed, the blade A is pulled outward so that the alignment pin 3 moves toward the thread groove 21 until it exits the guide groove 11 and the connector 2 exits the installation groove 1 .

[0113] By adopting the above technical solution, the connecting member 2 is separated from the installation groove 1, which can facilitate the execution of step D.

[0114] The above content is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A blade connection structure for a submersible pump, characterized in that: include: A mounting groove is provided on the outer peripheral wall of the impeller body and extends toward the central axis of the impeller body; and a guide groove extending along the axial direction thereof is further provided on the inner wall of the mounting groove; a connecting member, adapted to be slidably inserted into the mounting groove and connected to the impeller body via a locking structure; a threaded groove is formed on the outer end surface of the connecting member, and a through hole is formed on the inner wall of the threaded groove, penetrating the outer circumference of the connecting member and adapted to communicate with the guide groove; An alignment pin is slidably inserted into the through hole and has an elastic member between the alignment pin and the connecting member, so that the elastic member drives the alignment pin to move out of the thread groove and into the guide groove; when the alignment pin moves to abut the end wall of the guide groove away from the bottom of the installation groove, the alignment pin is adapted to move toward the thread groove and cause the elastic member to undergo elastic deformation; and a docking rod adapted to be threadedly connected to the thread groove, and used to close the through hole to restrict the movement of the alignment pin toward the thread groove, or to avoid the through hole so that the alignment pin can be inserted into the thread groove; an end of the docking rod away from the bottom of the thread groove is used to be connected to the blade, and when the docking rod is threadedly connected to the thread groove, the blade can abut against the outer end surface of the connecting member; When the connecting member moves toward the outside of the installation groove until the alignment pin abuts against the end wall of the guide groove, the corresponding blade moves to a position to avoid the adjacent blade, so that the blade can rotate around the docking rod as the axis.

2. The blade connection structure for a submersible pump according to claim 1, wherein: A sinking groove coaxially connected to the through hole is provided on the outer circumferential surface of the connecting member, and the alignment pin includes: A pin portion is slidably inserted into the through hole, and an end surface of the pin portion close to one end of the thread groove adopts an arc surface structure adapted to the inner peripheral wall of the thread groove; and An end portion is fixedly connected to an end of the pin portion away from the threaded groove and is suitable for being embedded in the sinking groove; Wherein, when the end portion is embedded in the sinking groove, part of the pin shaft portion is inserted into the thread groove, and the elastic member elastically stores energy; When the end portion exits the sinking groove and is embedded in the guide groove, the pin shaft portion is adapted to avoid the inner space of the thread groove, and the elastic member is in an energy storage state or a natural state.

3. The blade connection structure for a submersible pump according to claim 2, wherein: The elastic member is a spring sleeved on the pin shaft, with two ends respectively abutting against the end portion and the bottom of the sinking groove; Wherein, when the end portion is embedded in the sinking groove, the spring is in a compressed state, and a portion of the pin shaft portion is inserted into the threaded groove; When the end portion exits the sinking groove and is inserted into the guide groove, the spring is in a natural state or a compressed state, and the pin shaft portion is adapted to avoid the inner space of the thread groove.

4. The blade connection structure for a submersible pump according to claim 2, wherein: The side surface of the end head portion facing the outer end surface of the connecting piece adopts an inclined surface, and / or the end wall of the guide groove away from the bottom of the installation groove adopts an inclined surface, so that when the end head portion abuts the end wall of the guide groove away from the bottom of the installation groove, the end head portion can move toward the bottom of the sinking groove.

5. The blade connection structure for a submersible pump according to claim 1, wherein: The locking structure comprises: a first positioning hole, configured to be opened on the impeller body; the first positioning hole passes through the impeller body in a thickness direction and is in communication with the mounting groove; a second positioning hole, formed on the connecting member; when the connecting member is inserted into the mounting slot, the second positioning hole is adapted to be coaxially connected to the first positioning hole; and The locking rod is suitable for being inserted into the first positioning hole and the second positioning hole that are connected to each other, and its two ends extend to both sides of the impeller body respectively; both ends of the locking rod are detachably connected to an abutment portion, and the two abutment portions are used to abut the outer side surface of the impeller body to limit the movement of the locking rod relative to the impeller body.

6. The blade connection structure for a submersible pump according to claim 1, wherein: The blade connection structure further includes: a slot, formed on the blade and located on a side of the blade facing the impeller body; and a reinforcing rod, used for being fixedly connected to the outer peripheral wall of the impeller body and for being inserted into the slot and abutting against the bottom of the slot; Wherein, when the connecting member moves toward the outside of the installation slot until the alignment pin abuts against the end wall of the guide slot, the reinforcing rod is located outside the slot.

7. The blade connection structure for a submersible pump according to any one of claims 1 to 6, characterized in that: The connecting piece further comprises: a rubber pad fixedly connected to the outer end surface of the connecting piece, and having an avoidance hole connected to the threaded groove; the rubber pad is made of elastic rubber material so that when the blade is connected to the rubber pad and the blade rotates about the docking rod as the axis, the rubber pad can be deformed; Among them, the side of the rubber pad facing away from the connecting piece adopts an arc surface structure adapted to the outer peripheral surface of the impeller body, so that when the locking structure connects the connecting piece and the impeller body, the rubber pad is suitable for filling the gap between the open end of the mounting groove and the connecting piece.

8. A detachable impeller guide wheel for a submersible oil pump, characterized in that: The invention comprises a plurality of blade connection structures for submersible pumps according to any one of claims 1 to 7.

9. A method for disassembling blades for a submersible pump, based on the detachable impeller according to claim 8, wherein the detachable impeller comprises a first blade connection structure acting on blade A, a second blade connection structure acting on blade B, and a third blade connection structure acting on blade C; wherein: The blade A is located between the blade B and the blade C; The blade disassembly method is characterized by comprising the following steps: A. releasing the locking structure in the first blade connection structure so that the corresponding connecting member can move axially along the mounting groove; B. Pull blade A outward, causing the corresponding connecting member to move synchronously until the alignment pin abuts against the end of the guide groove away from the bottom of the mounting groove, so that blade A is located outside blades B and C; C. Rotating blade A around the corresponding docking rod until the docking rod moves to a position that avoids the through hole; during this process, the movement trajectory of blade A avoids blades B and C; D. Rotate the blade A with the corresponding docking rod as the axis, so that the docking rod exits the thread groove, thereby separating the blade A from the connecting member and the blade A from the impeller body.

10. The method for disassembling blades for a submersible pump according to claim 9, wherein: After step C is completed, the blade A is pulled outward so that the alignment pin moves toward the thread groove until it exits the guide groove and the connecting member exits the installation groove.

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