Magnetic drive pump head assembly

Abstract

The utility model discloses a pump head assembly of a magnetic drive pump, which comprises a pump shell, a pump cover detachably mounted on the pump shell, a mounting cavity formed between the pump shell and the pump cover, a rotating shaft rotationally arranged on the pump shell and extending into the mounting cavity, and an impeller mounted in the mounting cavity, a detachable linkage structure forming steering linkage of the rotating shaft and the impeller is arranged between the rotating shaft and the impeller, a rotating assembly is rotationally connected to the impeller, and the rotating assembly is fixed between the pump cover and the pump shell and used for limiting the impeller to move along the axis of the rotating shaft. The impeller has the following advantages and effects that the impeller can be conveniently disassembled and assembled, so that the operation difficulty is reduced, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a magnetic force pump, especially a magnetic force pump pump head assembly. BACKGROUND

[0002] The magnetic force pump is a new type centrifugal pump, it applies the working principle of permanent magnet coupling to the design of centrifugal pump, makes it have full seal, no leakage, corrosion resistance and so on, the magnetic force pump is mainly composed of pump head, magnetic force driver, motor and connecting base plate and so on several parts.

[0003] In the magnetic force pump, the fastening connection between the rotating shaft and the impeller is realized through a nut. Since the application field of the magnetic force pump is extremely wide, it is inevitable to contact various different fluid media during its operation. When hard particle impurities are mixed in the fluid medium, the impurities are in contact with the high-speed rotating impeller, which is extremely easy to cause damage to the impeller. Therefore, when the magnetic force pump is used in harsh conditions, the impeller needs to be regularly disassembled and replaced. The disassembly and assembly operation of the impeller necessarily involves the disassembly and assembly of the fastening nut. Since the threaded connection of the nut is long-term subjected to medium corrosion, it is easy to appear jamming or even jamming phenomenon, which greatly increases the difficulty of replacing the impeller, and is easy to cause irreparable damage to the nut when excessive force is applied, thereby further increasing the difficulty of replacement. SUMMARY

[0004] The utility model aims at providing a magnetic force pump pump head assembly, which can realize convenient disassembly and assembly of the impeller, thereby reducing the operation difficulty and improving the work efficiency.

[0005] The above technical purpose of the utility model is realized through the following technical scheme: a magnetic force pump pump head assembly, comprising a pump shell, a pump cover detachably installed on the pump shell, an installation cavity formed between the pump shell and the pump cover, a rotating shaft rotatably arranged in the pump shell and extending into the installation cavity, and an impeller installed in the installation cavity, a detachable linkage structure is arranged between the rotating shaft and the impeller, the detachable linkage structure constitutes the rotation linkage of the rotating shaft and the impeller, a rotating assembly is rotatably connected to the impeller, and the rotating assembly is fixed between the pump cover and the pump shell and is used for limiting the movement of the impeller along the axis of the rotating shaft.

[0006] Through the above technical scheme, the rotating shaft can drive the impeller to rotate through the detachable linkage structure, and the position of the impeller is limited by the cooperating rotating assembly without interfering with the normal rotation of the impeller, so as to ensure that the impeller and the rotating shaft can be in a stable linkage position, thereby ensuring the implementability of the setting structure. When the impeller needs to be replaced, the pump cover is removed and the rotating shaft and the impeller can be conveniently separated through the cooperating detachable linkage structure, thereby realizing convenient disassembly and assembly of the impeller, reducing the operation difficulty, and improving the work efficiency.

[0007] Further, the detachable linkage structure comprises a polygon linkage shaft fixed to the rotating shaft and a linkage hole provided on the impeller and into which the polygon linkage shaft is inserted, and the linkage hole is shaped to match the polygon linkage shaft.

[0008] By using the above technical solution, the polygon linkage shaft is inserted into the linkage hole to form a linkage between the rotating shaft and the impeller, and the impeller can be conveniently separated from the rotating shaft by pulling out the impeller.

[0009] Further, the rotating assembly comprises a left rotating member, a right rotating member, and a limiting slot formed between the left rotating member and the right rotating member and into which the impeller is installed.

[0010] By using the above technical solution, the left rotating member and the right rotating member are provided to realize the rotational cooperation between the impeller and the pump shell and between the impeller and the pump cover, so that the impeller clamped between the pump shell and the pump cover can be normally rotated and limited by the two.

[0011] Further, when the rotating assembly is fixed between the pump cover and the pump shell and the impeller is installed into the limiting slot, an extrusion gap is formed between the left rotating member and the right rotating member.

[0012] By using the above technical solution, the extrusion gap formed can compensate for the cooperation tolerance formed between the cooperation structures, so that the left rotating member and the right rotating member can better limit the impeller to improve the stability of the impeller during operation.

[0013] Further, the limiting slot comprises a left stepped slot provided on the left rotating member and a right stepped slot provided on the right rotating member.

[0014] By using the above technical solution, the above-mentioned structure can better limit the impeller.

[0015] Further, the extrusion member is connected with a driving assembly that drives the extrusion member to reciprocate towards the pump shell and the pump cover, and the extrusion member and the pump shell and the pump cover form a compression structure that is driven by the extrusion member to make the pump shell and the pump cover closer to each other.

[0016] By using the above technical solution, the driving assembly drives the extrusion member to be closer to the pump shell and the pump cover, and the compression structure is provided to realize the compression and fixation between the pump shell and the pump cover, so that the disassembly and assembly of the pump cover can be more convenient.

[0017] Further setting is that the pressing structure comprises an extrusion groove arranged on the extrusion piece, extrusion slopes arranged on the two side walls of the extrusion groove corresponding to the pump shell and the pump cover, and a matching slope arranged on the pump shell and the pump cover, the two extrusion slopes are symmetrically arranged along the movement direction of the extrusion piece, and the two matching slopes are arranged on the two sides of the pump shell and the pump cover respectively.

[0018] By adopting the technical scheme, the extrusion piece drives the extrusion groove to insert into the pump shell and the pump cover, the force direction is changed through the arranged extrusion slope and the matching slope, so that the pump shell and the pump cover are driven to approach each other.

[0019] Further setting is that the driving assembly comprises a driving screw threadedly connected with the base and a rotating structure formed between the driving screw and the extrusion piece.

[0020] By adopting the technical scheme, the extrusion piece approaches or moves away from one side of the pump shell and the pump cover by rotating the driving screw.

[0021] In summary, the utility model has the following beneficial effects: the utility model can realize convenient disassembly and assembly of the impeller, so as to reduce operation difficulty and improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of an embodiment;

[0023] Figure 2 It is a structure schematic view of an embodiment; Figure 1 It is an enlarged view of A part in the middle;

[0024] Figure 3 It is a local structure schematic view of an embodiment;

[0025] Figure 4 It is a sectional view of an embodiment;

[0026] Figure 5 It is a sectional view of an embodiment; Figure 4 It is an enlarged view of B part in the middle.

[0027] In the drawing: 1, pump shell; 2, pump cover; 3, mounting cavity; 4, rotating shaft; 5, impeller; 6, rotating assembly; 61, left rotating piece; 62, right rotating piece; 63, left part stepped groove; 64, right part stepped groove; 71, polygonal linkage shaft; 72, linkage hole; 8, extrusion gap; 9, extrusion piece; 10, driving assembly; 101, driving screw; 102, rotating structure; 11, pressing structure; 111, extrusion groove; 112, extrusion slope; 113, matching slope; 12, base. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail in combination with the drawings.

[0029] Reference Figures 1 to 5 A magnetic pump head assembly, comprising a pump shell 1, a pump cover 2 detachably mounted on the pump shell 1, an installation cavity 3 formed between the pump shell 1 and the pump cover 2, a rotating shaft 4 rotatably arranged in the pump shell 1 and extending into the installation cavity 3, and an impeller 5 mounted in the installation cavity 3. A detachable linkage structure is arranged between the rotating shaft 4 and the impeller 5 to form a linkage between the two. A rotating assembly 6 is rotatably connected to the impeller 5 and is fixed between the pump cover 2 and the pump shell 1 to limit the movement of the impeller 5 along the axis of the rotating shaft 4.

[0030] The detachable linkage structure comprises a polygonal linkage shaft 71 integrally arranged at one end of the rotating shaft 4 and a linkage hole 72 formed in the impeller 5 and adapted for the insertion of the polygonal linkage shaft 71. The polygonal linkage shaft 71 is a hexagonal prism, and the linkage hole 72 is a hexagonal hole.

[0031] The rotating assembly 6 comprises a left rotating member 61, a right rotating member 62, and a limiting groove formed between the left rotating member 61 and the right rotating member 62 and adapted for the installation of the impeller 5. When the rotating assembly 6 is fixed between the pump cover 2 and the pump shell 1 and the impeller 5 is installed in the limiting groove, an extrusion gap 8 is formed between the left rotating member 61 and the right rotating member 62. The limiting groove comprises a left stepped groove 63 formed in a gasket of the left rotating member 61 and a right stepped groove 64 formed in a gasket of the right rotating member 62. The left rotating member 61 and the right rotating member 62 are both planar bearings and are respectively embedded in the pump shell 1 and the pump cover 2.

[0032] Further comprising an extrusion member 9, the extrusion member 9 is connected with a driving assembly 10 for driving the extrusion member 9 to reciprocate towards one side of the pump shell 1 and the pump cover 2. An extrusion structure 11 is formed between the extrusion member 9 and the pump shell 1 and the pump cover 2, which drives the pump shell 1 and the pump cover 2 to move closer to each other by the extrusion member 9. The extrusion member 9, the driving assembly 10, and the extrusion structure 11 are all symmetrically arranged in two groups.

[0033] The extrusion structure 11 comprises an extrusion groove 111 formed in the extrusion member 9, an extrusion slope 112 arranged on the corresponding side wall of the pump shell 1 and the pump cover 2 of the extrusion groove 111, and a matching slope 113 arranged on the pump shell 1 and the pump cover 2. The two extrusion slopes 112 are symmetrically arranged along the movement direction of the extrusion member 9, and the two matching slopes 113 are respectively arranged on the side faces of the pump shell 1 and the pump cover 2.

[0034] The driving assembly 10 comprises a driving screw 101 threadedly connected with the base 12 and a rotating structure 102 formed between the driving screw 101 and the extrusion member 9. The rotating structure 102 comprises a rotating block integrally arranged at one end of the screw 101 and having a T-shaped cross section, and a rotating groove formed in the extrusion member 9 and rotatably matched with the rotating block. The rotating block and the rotating groove are both circumferentially rotatable and axially linked.

[0035] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. A person skilled in the art can make a modification without creative contribution according to the need after reading the specification, but as long as the modification is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A magnetic pump head assembly, comprising a pump housing (1), a pump cover (2) detachably mounted on the pump housing (1), a mounting cavity (3) formed between the pump housing (1) and the pump cover (2), a rotating shaft (4) rotatably disposed on the pump housing (1) and extending into the mounting cavity (3), and an impeller (5) mounted in the mounting cavity (3), characterized in that: A detachable linkage structure is provided between the rotating shaft (4) and the impeller (5) to form a steering linkage between the two. A rotating component (6) is rotatably connected to the impeller (5). The rotating component (6) is fixed between the pump cover (2) and the pump housing (1) and is used to restrict the movement of the impeller (5) along the axis of the rotating shaft (4).

2. The magnetic pump head assembly according to claim 1, characterized in that: The detachable linkage structure includes a polygonal linkage shaft (71) fixedly mounted on the rotating shaft (4) and a linkage hole (72) mounted on the impeller (5) for insertion of the polygonal linkage shaft (71). The shape of the linkage hole (72) is adapted to the polygonal linkage shaft (71).

3. The magnetic pump head assembly according to claim 1, characterized in that: The rotating assembly (6) includes a left rotating member (61), a right rotating member (62), and a limiting groove formed between the left rotating member (61) and the right rotating member (62) for mounting the impeller (5).

4. The magnetic pump head assembly according to claim 3, characterized in that: When the rotating assembly (6) is fixed between the pump cover (2) and the pump housing (1) and the impeller (5) is installed into the limiting groove, a compression gap (8) is formed between the left rotating part (61) and the right rotating part (62).

5. The magnetic pump head assembly according to claim 3, characterized in that: The limiting groove includes a left stepped groove (63) disposed on the left rotating member (61) and a right stepped groove (64) disposed on the right rotating member (62).

6. The magnetic pump head assembly according to claim 1, characterized in that: It also includes an extrusion member (9), on which a drive assembly (10) is connected to drive the extrusion member (9) to reciprocate toward the pump housing (1) and the pump cover (2). A clamping structure (11) is formed between the extrusion member (9) and the pump housing (1) and the pump cover (2) to drive the pump housing (1) and the pump cover (2) to move closer to each other through the extrusion member (9).

7. The magnetic pump head assembly according to claim 6, characterized in that: The pressing structure (11) includes an extrusion groove (111) disposed on the extruder (9), an extrusion inclined surface (112) disposed on the extrusion groove (111) corresponding to the two side walls of the pump housing (1) and the pump cover (2), and a mating inclined surface (113) disposed on the pump housing (1) and the pump cover (2). The two extrusion inclined surfaces (112) are symmetrically disposed along the movement direction of the extruder (9), and the two mating inclined surfaces (113) are respectively disposed on the opposite side of the pump housing (1) and the pump cover (2).

8. The magnetic pump head assembly according to claim 6, characterized in that: The drive assembly (10) includes a base (12) disposed below the pump housing (1), and includes a drive screw (101) threadedly connected to the base (12) and a rotating structure (102) formed between the drive screw (101) and the extruder (9).

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