Quick fixing device for pump head of magnetic suspension centrifugal pump

Abstract

A rapid fixing device for a pump head of a magnetic suspension centrifugal pump comprises a base body, and a fixed structure and a movable structure are installed on the base body. The fixing structure is provided with a first arc-shaped part and a second arc-shaped part in the vertical direction, and the second arc-shaped part is inwards provided with at least one vertical positioning check block. The fixing structure is provided with a first end and a second end in the horizontal direction, and the first end is provided with a locking piece. The movable structure is provided with a third end and a fourth end in the horizontal direction, the third end of the movable structure is rotatably connected to the base body, the fourth end of the movable structure is provided with a locking buckle, and the locking buckle can be locked to the locking piece; the movable structure is provided with a third arc-shaped part and a fourth arc-shaped part in the vertical direction, and at least one positioning protruding block is arranged on the inner side of the third arc-shaped part and the inner side of the fourth arc-shaped part. The inner arc surface of the fourth arc-shaped part inwards protrudes out of the third arc-shaped part; a gap is formed between the second end of the fixed structure and the third end of the movable structure. Therefore, the pump head can be accurately positioned and quickly disassembled and assembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood pump fixed structure, concretely relates to a quick fixing device of magnetic suspension centrifugal blood pump pump head. BACKGROUND

[0002] Magnetic suspension centrifugal pump adopts the structure of stator, rotor separation, realizes the accurate positioning, suspension and high speed rotation of rotor through magnetic field. The rotor is located in the pump head interior and has no mechanical connection, the gap between rotor and pump head shell is small, and the pump head is precisely controlled by motor magnetic field, therefore the installation position of pump head directly influences the running state of rotor. If the pump head is eccentric, not horizontal and the like, the magnetic suspension centrifugal pump can cause rotor to bump wall, power, noise increase, heat, performance decline and the like in operation. Foreign and domestic similar products rely on the positioning of pump head outer contour, rely on the magnetic force of magnetic suspension motor itself and fix, some products can increase fixed buckle or increase top screw on side to strengthen fixation, and the operation is complicated, time -consuming, the high precision requirement of pump head outer contour is high, and the pump head still can produce the shift under the action of external force, causes the heat damage or emergency shutdown of pump head. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a quick fixing device of magnetic suspension centrifugal pump pump head, and aims at solving the problem of pump head fixation.

[0004] In order to realize the above -mentioned purpose, the utility model adopts the following technical scheme:

[0005] A quick fixing device of magnetic suspension centrifugal pump pump head, the device includes: annular base body, install a fixed structure and a movable structure on the base body;

[0006] The fixed structure has first arc part and second arc part along the up and down direction, and at least one vertical positioning stopper is arranged in the second arc part inward;The fixed structure has first end and second end along the horizontal direction, and the first end is provided with a locking part;

[0007] The movable structure has third end and fourth end along the horizontal direction, and the third end of the movable structure is rotatably connected to the base body through a pin shaft, and the fourth end of the movable structure is provided with a locking buckle, and the locking buckle can be locked to the locking part;

[0008] The movable structure has third arc part and fourth arc part along the up and down direction, and at least one positioning lug is arranged on the inner side of the third arc part and the fourth arc part;The inner arc surface of the fourth arc part is protruded inwardly to the third arc part to form a vertical positioning baffle;

[0009] Wherein, the second end of the fixed structure and the third end of the movable structure form a gap.

[0010] Preferably, the locking buckle comprises a hook bent towards the outside;

[0011] The first end of the fixing structure is provided with a mounting groove on the side portion;

[0012] The locking member comprises a stop plate, one end of the stop plate is provided with a limiting hook bent towards the inside;

[0013] The middle portion of the stop plate is rotatably installed in the mounting groove through a pin shaft;

[0014] The other end of the stop plate abuts against one end of a spring, the other end of the spring presses against the bottom of the mounting groove;

[0015] The outside of the stop plate corresponding to the spring is provided with a pressing portion.

[0016] Preferably, the positioning protrusion is a half cylinder, the half cylinder extends from the third arc-shaped portion to a fourth arc-shaped portion along the up-down direction.

[0017] Preferably, the positioning protrusion is inwardly protruded from the vertical positioning stop plate.

[0018] Preferably, the second end of the fixing structure has an arc guide surface.

[0019] Preferably, the inner arc surface of the first arc-shaped portion of the fixing structure and the third arc-shaped portion of the movable structure is flush with the inner arc surface of the base body.

[0020] Preferably, the fixing structure and the base body are integrally formed.

[0021] Preferably, at least one through hole penetrating through the fixing structure and the base body is arranged along the up-down direction.

[0022] Preferably, at least one through hole is arranged on the base body corresponding to the movable structure along the up-down direction.

[0023] Preferably, the third arc-shaped portion is provided with a position avoiding groove corresponding to the through hole.

[0024] The quick fixing device of the magnetic suspension centrifugal pump head provided by the utility model is installed on a centrifugal pump driving motor, the centrifugal pump head is designed with a special fixed stop opening and a positioning groove structure, which cooperates with the device, so that accurate positioning and quick disassembly and assembly of the pump head can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 And Figure 2 It is a main structure schematic view of a quick fixing device of a magnetic suspension centrifugal pump head of the utility model;

[0026] Figure 3It is partial structure schematic view of quick fixing device of magnetic suspension centrifugal pump head of the utility model;

[0027] Figure 4 It is main structure schematic view of magnetic suspension centrifugal pump head of the utility model;

[0028] Figures 5 to 10 It is use flow schematic view of quick fixing device of magnetic suspension centrifugal pump head of the utility model. DETAILED DESCRIPTION

[0029] The utility model will be further described in detail in combination with the drawings and embodiments.

[0030] Refer to Figure 1 And Figure 2 , Figure 1 It is the main structure of quick fixing device of magnetic suspension centrifugal pump head.The device includes: annular base body 10, installs a fixed structure 20 and a movable structure 30 on base body 10.Fixed structure 20 has first arc portion 21 and second arc portion 22 along the up-down direction.Fixed structure 20 is integrally formed with base body 10, and first arc portion 21 is located below second arc portion 22, that is, first arc portion 21 is closer to base body 10 than second arc portion 22.Second arc portion 22 is inwardly provided with at least one vertical positioning stopper 23, that is, the vertical positioning stopper 23 is a protruding block extending along the up-down direction on the inner side of second arc portion 22.

[0031] Please refer to Figure 3 And Figure 9 , fixed structure 20 has first end and second end along the horizontal direction, and the first end is provided with locking member 40.The second end of fixed structure 20 has arc guide surface 24.Movable structure 30 has third end and fourth end along the horizontal direction, and the third end of movable structure 30 is rotatably connected to the upper surface of base body 10 by a pin shaft, and the fourth end of movable structure 30 is provided with a locking buckle 50, which can be locked to locking member 40.Specifically, locking buckle 50 includes a hook member curved towards the outside;fixed structure 20 is provided with a mounting groove 25 on the side;locking member 40 includes a stop plate 41, one end of the stop plate 41 is provided with a limit hook 42 curved towards the inside;the middle part of stop plate 41 is rotatably installed in mounting groove 25 by a pin shaft;the other end of stop plate 41 abuts one end of a spring 43, and the other end of spring 43 presses against the bottom of mounting groove 25.The outer side of stop plate 41 corresponding to spring 43 is provided with a pressing part 44.

[0032] Refer to Figure 2The movable structure 30 has a third arc-shaped portion 31 and a fourth arc-shaped portion 32 along the up-down direction. The third arc-shaped portion 31 is below the fourth arc-shaped portion 32, that is, the third arc-shaped portion 31 is closer to the base 10 than the fourth arc-shaped portion 32. At least one positioning protrusion 33 is provided on the inner side of the third arc-shaped portion 31 and the fourth arc-shaped portion 32; specifically, the positioning protrusion 33 is a semi-cylinder that extends from the third arc-shaped portion 31 to the fourth arc-shaped portion 32 along the up-down direction, and the positioning protrusion 33 is slightly protruded inwardly from the vertical positioning baffle. The inner arc surface of the fourth arc-shaped portion 32 protrudes inwardly from the third arc-shaped portion 31 to form a vertical positioning baffle, that is, the inner side surface of the third arc-shaped portion 31 protrudes from the third arc-shaped portion 31, and serves as a vertical positioning baffle of the magnetic levitation centrifugal pump during use.

[0033] A gap is formed between the second end of the fixed structure 20 and the third end of the movable structure 30. This gap allows the fluid passage of the magnetic levitation centrifugal pump head to pass through. The inner curved surfaces of the first curved portion 21 of the fixed structure 20 and the third curved portion 31 of the movable structure 30 are flush with the inner curved surface of the base 10.

[0034] To quickly secure the pump head of the magnetically levitated centrifugal blood pump of this invention, at least one through-hole 60 is provided vertically, extending through the fixed structure 20 and the base 10. At least one through-hole 60 is also provided vertically on the base 10, corresponding to the movable structure 30. The device can be secured to the upper portion of the magnetically levitated motor 61 using screws. To prevent the screws from interfering with the opening and closing of the movable structure 30, a relief groove 34 is provided on the third curved portion 31, corresponding to the through-hole 60 of the movable structure 30.

[0035] In summary, the quick fixing device for the magnetic levitation centrifugal blood pump head provided by the present invention is suitable for the quick positioning and installation of the magnetic levitation centrifugal pump head, such as Figure 4 As shown, the pump head of the magnetic levitation centrifugal pump is provided with a positioning groove 51 and a mounting stop 52. Figure 5 As shown, when in use, place the magnetic levitation centrifugal pump head vertically downward on the device (such as Figure 6 As shown). Rotate the magnetic suspension centrifugal pump head so that the vertical positioning block 23 is located above the installation stop 52, as shown. Figure 7 Clockwise buckle the movable structure 30 so that the vertical positioning baffle presses the installation stop 52, and the positioning protrusion 33 is in full contact with the positioning groove 51 of the magnetic levitation centrifugal pump head, as shown. Figure 8 Pressing the pressing portion 44 of the locking member 40 causes one end of the stop plate 41 to squeeze the spring 43. As the spring 43 continues to compress, the limit hook 42 rotates around the pin and tilts up. Release the pressing portion 44 to allow the spring 43 to recover. The limit hook 42 rotates counterclockwise and completely abuts against the hook 51 of the locking buckle, completing the locking. Figure 9 、 Figure 10 shown.

[0036] When the magnetic suspension centrifugal pump head is released, the pressing portion 44 is pressed, the limiting hook 42 rotates around the pin shaft and is lifted, the limiting hook 42 is instantaneously rotated to be separated from the hook piece 51 to release the restriction on the magnetic suspension centrifugal pump head, after the magnetic suspension centrifugal pump head is rotated to be separated from the vertical positioning stopper 23, the magnetic suspension centrifugal pump head is vertically taken out.

[0037] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "vertical", "horizontal", "front", "rear" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, it should be further pointed out that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to the article or equipment / device.

[0040] The above is the preferred embodiment of the present application and the technical principle used thereby, for those skilled in the art, without departing from the spirit and scope of the present application, any equivalent transformation, simple replacement, etc. based on the technical scheme of the present application, all belong to the protection scope of the present application.

Claims

1. A quick fixing device for a magnetic levitation centrifugal pump head, characterized in that: The device comprises: an annular base, on which a fixed structure and a movable structure are mounted; The fixing structure has a first arc-shaped portion and a second arc-shaped portion along the vertical direction, and the second arc-shaped portion is provided with at least one vertical positioning block inwardly; the fixing structure has a first end and a second end along the horizontal direction, and the first end is provided with a locking member; The movable structure has a third end and a fourth end in the horizontal direction, the third end of the movable structure is rotatably connected to the base via a pin, and the fourth end of the movable structure is provided with a locking buckle, which can be locked to the locking member; The movable structure has a third arc-shaped portion and a fourth arc-shaped portion along the vertical direction, and at least one positioning protrusion is provided on the inner side of the third arc-shaped portion and the fourth arc-shaped portion; the inner arc surface of the fourth arc-shaped portion protrudes inwardly from the third arc-shaped portion to form a vertical positioning baffle; Wherein, a gap is formed between the second end of the fixed structure and the third end of the movable structure.

2. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 1, characterized in that: The locking buckle includes a hook bent toward the outside; The first end of the fixing structure is provided with a mounting groove on the side; The locking member includes a stop plate, one end of which is provided with a limit hook bent inward; The middle portion of the stop plate is rotatably mounted in the mounting groove via a pin; The other end of the stop plate abuts against one end of a spring, and the other end of the spring presses against the bottom of the mounting slot; A pressing portion is provided on the outer side of the stop plate corresponding to the spring.

3. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 1, characterized in that: The positioning protrusion is a semi-cylinder, and the semi-cylinder extends from the third arc-shaped portion to the fourth arc-shaped portion along the up-down direction.

4. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 3, characterized in that: The positioning protrusion protrudes inward from the vertical positioning baffle.

5. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 1, characterized in that: The second end of the fixing structure has an arc guide surface.

6. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 1, characterized in that: The inner arc surfaces of the first arc-shaped portion of the fixed structure and the third arc-shaped portion of the movable structure are flush with the inner arc surface of the base.

7. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 1, characterized in that: The fixing structure and the base are integrally formed.

8. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 7, characterized in that: At least one through hole penetrating the fixing structure and the base is provided along the up-down direction.

9. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 1, characterized in that: At least one through hole is provided on the base corresponding to the movable structure along the up-down direction.

10. The quick fixing device for a magnetic levitation centrifugal pump head according to claim 9, characterized in that: Corresponding to the through hole, the third arc portion is provided with a avoiding groove.

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