Centrifugal pump with pump head capable of being quickly disassembled and assembled

Abstract

The utility model provides a centrifugal pump with a quickly-disassembled and quickly-assembled pump head. The centrifugal pump comprises a pump head assembly, a driving unit and a fixing assembly. The pump head assembly comprises a mounting part arranged on the circumferential surface of the pump shell body; the fixing assembly comprises a first fixing ring, a second fixing ring and a rotary clamping structure; the end face, facing the rotary clamping structure, of the first fixing ring and / or the second fixing ring is provided with at least one clamping block. The rotary clamping structure comprises a rotary clamping body and a first limiting part; the two sides, close to the first fixing ring and / or the second fixing ring, of the rotary clamping body are provided with at least one clamping groove. When the rotary clamping structure rotates, the clamping block and the clamping groove are in interference fit, and fixing of the rotary clamping structure is achieved. The lower end face of the first limiting part is in compression joint with the mounting part to limit the pump head assembly, so that the pump head assembly runs stably and is mounted and fixed quickly; when the pump head assembly needs to be disassembled, the rotary clamping structure rotates in the opposite direction, so that the clamping block is separated from the clamping groove, the first limiting part is away from the pump head assembly, and rapid disassembly of the pump head assembly is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with quick disassembly and quick assembly of pump head. BACKGROUND

[0002] A centrifugal pump is generally composed of a driving unit and a pump head. When in use, the pump head is directly in contact with the pumped liquid. When the pumped liquid is a high-purity liquid such as blood, the pump head needs to be frequently replaced to ensure safety. However, the centrifugal pumps in the prior art generally have the problems of complex pump head installation and inconvenient disassembly, which leads to a long replacement process, affects the use efficiency, and may increase the operation burden of the operator. In addition, there may be a risk of pump head installation out of position or deviation or even falling off during operation, thereby affecting the pumping performance and even causing safety hazards. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the above technical problems, the present application provides a centrifugal pump with quick disassembly and quick assembly of pump head, which comprises a pump head assembly, a driving unit and a fixing assembly.

[0004] The pump head assembly comprises a pump shell, wherein the pump shell comprises a pump shell body and a mounting portion arranged on the circumferential surface of the pump shell body.

[0005] The fixing assembly comprises a first fixing ring, a second fixing ring and a rotating clamping structure; the first fixing ring and the second fixing ring are fixedly arranged on the driving unit at intervals.

[0006] The rotating clamping structure is rotationally arranged between the first fixing ring and the second fixing ring.

[0007] The end surface of the first fixing ring and / or the second fixing ring towards the rotating clamping structure is provided with at least one clamping block.

[0008] The rotating clamping structure comprises a rotating clamping body and a first limiting portion; at least one clamping groove is arranged on both sides of the rotating clamping body close to the first fixing ring and / or the second fixing ring; when the rotating clamping structure rotates, the clamping block is clamped into the clamping groove; the lower end surface of the first limiting portion is in pressure contact with the mounting portion, thereby limiting the pump head assembly.

[0009] In some embodiments of the present application, the rotating clamping structure further comprises a second limiting portion; the second limiting portion is arranged on the lower end surface of the first limiting portion; a limiting groove is formed on the mounting portion, and the opening of the limiting groove is away from the pump shell body; the second limiting portion can be accommodated in the limiting groove.

[0010] In some embodiments of the present application, a first open slot is arranged on the upper end surface of the driving unit; a second open slot is arranged on the end surface of the first fixing ring and the second fixing ring towards the rotating clamping structure; the first open slot and the second open slot jointly enclose a rotating limiting slot.

[0011] In some embodiments of the present application, a rotating shaft is arranged on the lower part of the rotating clamping body; the rotating shaft is rotationally arranged in the rotating limiting slot.

[0012] In some embodiments of the present application, a first clamping part is arranged on the side of the mounting part away from the driving unit; the first clamping part has a first inclined surface.

[0013] In some embodiments of the present application, a second clamping part is arranged on the inner circumferential surface of the first fixing ring and / or the second fixing ring; a clamping slot is formed between the lower end surface of the second clamping part and the upper end surface of the driving unit.

[0014] In some embodiments of the present application, the lower end surface of the second clamping part is a second inclined surface, and the inclination direction of the second inclined surface is the same as that of the first inclined surface.

[0015] In some embodiments of the present application, the shape of the second clamping part is matched with that of the limiting slot.

[0016] In some embodiments of the present application, the clamping block is a cylinder or a cuboid.

[0017] In some embodiments of the present application, there are two rotating clamping structures, one of which is arranged between the first end of the first fixing ring and the first end of the second fixing ring; the other is arranged between the second end of the first fixing ring and the second end of the second fixing ring.

[0018] Compared with the prior art, the pump head quick dismounting and quick mounting type centrifugal pump has the following advantages and beneficial effects: the pump head quick dismounting and quick mounting type centrifugal pump comprises a pump head assembly, a driving unit and a fixing assembly; the pump head assembly comprises an installation portion arranged on the circumferential surface of the pump shell body; the fixing assembly comprises a first fixing ring, a second fixing ring and a rotary clamping structure; at least one clamping block is arranged on the end face of the first fixing ring and / or the second fixing ring towards the rotary clamping structure; the rotary clamping structure comprises a rotary clamping body and a first limiting portion; at least one clamping groove is arranged on the two sides of the rotary clamping body close to the first fixing ring and / or the second fixing ring; in this way, when the rotary clamping structure rotates, the clamping block can be clamped into the clamping groove and be in interference fit with the clamping groove, so that the fixing of the rotary clamping structure is realized; when the pump head assembly needs to be dismounted, the rotary clamping structure rotates in the opposite direction, so that the clamping block is separated from the clamping groove, and the first limiting portion is away from the pump head assembly, thereby realizing the quick dismounting of the pump head assembly.

[0019] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present text. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present text, are intended to provide further understanding of the present text, and the illustrative embodiments of the present text and their description are intended to explain the present text, and do not constitute an improper limitation of the present text. In the drawings:

[0021] Figure 1 is a structural schematic view of a pump head quick dismounting and quick mounting type centrifugal pump provided by an exemplary embodiment of the present application;

[0022] Figure 2 is a front view of a pump head quick dismounting and quick mounting type centrifugal pump provided by an exemplary embodiment of the present application;

[0023] Figure 3 is a structural schematic view of a pump head assembly provided by an exemplary embodiment of the present application;

[0024] Figure 4 is a front view of a pump head assembly provided by an exemplary embodiment of the present application;

[0025] Figure 5 is a structural schematic view of a pump head quick dismounting and quick mounting type centrifugal pump (with a hidden pump head assembly) provided by an exemplary embodiment of the present application;

[0026] Figure 6 is a structural schematic view of a rotary clamping structure provided by an exemplary embodiment of the present application;

[0027] Figure 7is a structural schematic view of a rotating clamping structure provided by an exemplary embodiment of the present application.

[0028] Figure 8 is a structural schematic view of a first fixing ring and a second fixing ring provided by an exemplary embodiment of the present application.

[0029] In the figure:

[0030] 10, pump head assembly; 101, pump shell body; 102, mounting portion; 103, first clamping portion; 104, first inclined surface; 105, limiting groove; 20, driving unit; 201, first open slot; 30, fixing assembly; 301, first fixing ring; 302, second fixing ring; 303, clamping block; 304, second open slot; 305, second clamping portion; 33, rotating clamping structure; 331, rotating clamping body; 332, first limiting portion; 333, second limiting portion; 334, clamping groove; 335, rotating shaft. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other at will.

[0032] A centrifugal pump is generally composed of a driving unit and a pump head. In use, the pump head directly contacts with the pumped liquid. When the pumped liquid is a high-purity liquid such as blood, the pump head needs to be frequently replaced to ensure safety. However, the centrifugal pump structure in the prior art generally has the problems of complex pump head installation and inconvenient disassembly, which leads to a long replacement process, affects the use efficiency, and may increase the operation burden of the operator. In addition, there may be a risk of pump head installation out of position or deviation or even falling off during operation, thereby affecting the pumping performance and even causing safety hazards.

[0033] Based on this, the exemplary embodiments of the present application provide a centrifugal pump with quick disassembly and quick installation of pump head, which comprises a pump head assembly, a driving unit and a fixing assembly; the pump head assembly comprises a mounting portion arranged on the circumferential surface of a pump shell body; the fixing assembly comprises a first fixing ring, a second fixing ring and a rotating clamping structure; at least one clamping block is arranged on the end face of the first fixing ring and / or the second fixing ring towards the rotating clamping structure; the rotating clamping structure comprises a rotating clamping body and a first limiting portion; at least one clamping groove is arranged on both sides of the rotating clamping body close to the first fixing ring and / or the second fixing ring; in this way, when the rotating clamping structure rotates, the clamping block can be clamped into the clamping groove to realize interference fit between the clamping block and the clamping groove, thereby realizing fixation of the rotating clamping structure; the lower end face of the first limiting portion is pressed against the mounting portion to realize axial and circumferential limiting of the pump head assembly, so that the pump head assembly operates stably and realizes quick installation and fixation of the pump head assembly; when the pump head assembly needs to be disassembled, the rotating clamping structure rotates in the opposite direction, so that the clamping block is separated from the clamping groove, and the first limiting portion is away from the pump head assembly, thereby realizing quick disassembly of the pump head assembly.

[0034] Embodiment 1:

[0035] An exemplary embodiment of the present application provides a centrifugal pump with quick disassembly and quick installation of pump head, as shown in Figure 1 and 2 , which comprises a pump head assembly 10, a driving unit 20 and a fixing assembly 30; the pump head assembly 10 comprises a pump shell and a rotor, and the rotor is arranged inside the pump shell; preferably, the driving unit 20 can be a motor capable of generating electromagnetic force, and under the driving of the driving unit 20, the rotor can rotate and suspend in the pump shell. As shown in Figure 3 and 4 , the pump shell comprises a pump shell body 101 and a mounting portion 102 arranged on the circumferential surface of the pump shell body 101. As shown in Figure 5 , the fixing assembly 30 comprises a first fixing ring 301, a second fixing ring 302 and a rotating clamping structure 33; the first fixing ring 301 and the second fixing ring 302 are fixed on the driving unit 20 by fasteners, and the first fixing ring 301 and the second fixing ring 302 are both arc-shaped and are adapted to the contour shape of the upper end face of the driving unit 20. Preferably, the first fixing ring 301 and the second fixing ring 302 are symmetrically arranged, and two symmetrically arranged mounting spaces are formed between the first fixing ring 301 and the second fixing ring 302; the rotating clamping structure 33 is rotatably arranged in the mounting space. Preferably, the rotating clamping structure 33 is two, and the two rotating clamping structures 33 are symmetrically arranged, wherein one rotating clamping structure 33 is arranged between the first end of the first fixing ring 301 and the first end of the second fixing ring 302; the other rotating clamping structure 33 is arranged between the second end of the first fixing ring 301 and the second end of the second fixing ring 302.

[0036] Exemplarily, as shown in Figure 5 and8 As shown, the upper end face of the driving unit 20 is provided with a first open slot 201; the end face of the first fixing ring 301 and the second fixing ring 302 towards the rotating clamping structure 33 is provided with a second open slot 304; the first open slot 201 and the second open slot 304 jointly form a rotating limiting slot. As shown, Figure 6 and 7 As shown, the rotating clamping structure 33 includes a rotating clamping body 331 and a first limiting part 332; the lower part of the rotating clamping body 331 is provided with a rotating shaft 335, both ends of the rotating shaft 335 extend out of the rotating clamping body 331; the rotating shaft 335 is rotationally arranged in the rotating limiting slot. During installation, first, one of the fixing rings is installed on the driving unit 20, then the rotating clamping structure 33 is installed, and then the remaining fixing rings are installed.

[0037] The end face of the first fixing ring 301 or the second fixing ring 302 towards the rotating clamping structure 33 is provided with at least one clamping block 303; for example, the end face of the first fixing ring 301 towards the rotating clamping structure 33 is provided with one clamping block 303 or multiple clamping blocks 303, and the multiple clamping blocks 303 are arranged in vertical direction. Preferably, the clamping block 303 is a cylinder or a rectangular body with rounded corners. The first limiting part 332 is arranged at an angle with the rotating clamping body 331, preferably, the angle between them is a right angle or an acute angle, and the first limiting part 332 extends in the radial direction of the pump head assembly 10; the rotating clamping body 331 and the first limiting part 332 are both arc-shaped, and the curvature of the bending is adapted to the curvature of the first fixing ring 301 or the second fixing ring 302.

[0038] Preferably, the rotating clamping body 331 extends away from the axis of the pump head assembly 10 to form a rotating handle, facilitating the operation of the rotating clamping structure 33. At least one clamping groove 334 is arranged on both sides of the rotating clamping body 331 close to the first fixed ring 301 or the second fixed ring 302; for example, one clamping groove 334 or multiple clamping grooves 334 are arranged on the side of the rotating clamping body 331 close to the first fixed ring 301; the number and position of the clamping grooves 334 are matched with the number of the clamping blocks 303, and the inner wall size of the clamping grooves 334 is slightly smaller than the outer peripheral size of the clamping blocks 303; when the rotating clamping structure 33 rotates towards the pump head assembly 10, the clamping blocks 303 are clamped into the clamping grooves 334 and are in interference fit with the clamping grooves 334, which can clamp the clamping blocks 303, achieving the fixation of the rotating clamping structure 33; at this time, the lower end surface of the first limiting portion 332 is in pressure bonding with the upper surface of the mounting portion 102, achieving the axial and circumferential limiting of the pump head assembly 10, so that the pump head assembly 10 operates stably, achieving the quick installation and fixation of the pump head assembly 10; when the pump head assembly 10 needs to be disassembled, the rotating clamping structure 33 rotates in the opposite direction, so that the clamping blocks 303 are separated from the clamping grooves 334, and the first limiting portion 332 is away from the pump head assembly 10, achieving the quick disassembly of the pump head assembly 10.

[0039] Preferably, as shown in Figure 8 , one clamping block 303 is arranged on the end surface of the first fixed ring 301 and the second fixed ring 302 towards the rotating clamping structure 33; one clamping groove 334 is arranged on both sides of the rotating clamping body 331 close to the first fixed ring 301 and the second fixed ring 302, so that both sides of the rotating clamping body 331 can achieve clamping fixation, so that the rotating clamping structure 33 has good stability, and the stability of the pump head assembly 10 is improved, so that the pump head assembly 10 operates stably.

[0040] Embodiment 2:

[0041] Based on the above-mentioned embodiment 1, in the present embodiment, as shown in Figure 6 and 7 , the rotating clamping structure 33 further comprises a second limiting portion 333; the second limiting portion 333 is arranged on the lower end surface of the first limiting portion 332; at this time, as shown in Figure 3 , the mounting portion 102 is provided with a limiting groove 105 with an opening away from the pump shell body 101; after the pump head assembly 10 is installed on the driving unit 20, the position of the limiting groove 105 is aligned with the position of the second limiting portion 333, so that after the rotating clamping structure 33 rotates, the lower end surface of the first limiting portion 332 is in pressure bonding with the mounting portion 102, and the second limiting portion 333 can be accommodated in the limiting groove 105, further achieving the circumferential limiting of the pump head assembly 10, preventing the pump head assembly 10 from rotating.

[0042] Embodiment 3:

[0043] Based on the above embodiment 1 or 2, in this embodiment, as follows: Figure 3 As shown, a first engaging portion 103 is provided on the side of the mounting portion 102 away from the drive unit 20; the first engaging portion 103 has a first inclined surface 104, one end of which extends to the mounting portion 102 and is smoothly connected to the mounting portion 102. A plurality of limiting grooves 105 are provided on the mounting portion 102, with an opening facing away from the pump housing body 101, and are spaced apart on the mounting portion 102. Figure 5 As shown in Figure 8, a second engaging portion 305 is provided on the inner circumferential surface of the first fixing ring 301 or the second fixing ring 302; or a second engaging portion 305 is provided on the inner circumferential surface of both the first fixing ring 301 and the second fixing ring 302; the shape of the second engaging portion 305 is adapted to the shape of the limiting groove 105. A engaging groove is formed between the lower end face of the second engaging portion 305 and the upper end face of the driving unit 20.

[0044] When installing the pump head assembly 10, firstly rotate the rotating snap-fit ​​structure 33 away from the pump head assembly 10 to reserve sufficient space for installation. Then, align the limiting groove 105 on the pump head assembly 10 with the second snap-fit ​​part 305 on the fixing ring and insert the pump head assembly 10 into the drive unit 20. Rotate the pump head assembly 10 from high to low along the first inclined surface 104. When the pump head assembly 10 rotates relative to the drive unit 20, the first snap-fit ​​part 103 enters the snap-fit ​​groove from the side. Continue rotating the pump head assembly 10. As the height of the first inclined surface 104 increases, the first inclined surface 104 and the lower end face of the second snap-fit ​​part 305 can be locked together, achieving a tight fit between the first inclined surface 104 and the lower end face of the second snap-fit ​​part 305, thereby limiting the circumferential and axial movement of the pump head assembly 10. Rotating the rotating snap-fit ​​structure 33 toward the pump head assembly 10 causes the lower end face of the first limiting part 332 to press against the mounting part 102, and the second limiting part 333 to be accommodated in the limiting groove 105, thereby further limiting the pump head assembly 10 in the circumferential and circumferential directions, preventing the pump head assembly 10 from rotating, and improving the stability of the pump head assembly 10.

[0045] Example 4:

[0046] Based on Embodiment 3 above, in this embodiment, the lower end face of the second snap-fit ​​portion 305 is a second inclined surface, and the inclination direction of the second inclined surface is the same as the inclination direction of the first inclined surface 104. In this way, the contact area between the first inclined surface 104 and the second inclined surface can be increased, avoiding local stress on the first inclined surface 104, and improving the snap-fit ​​stability between the two, so that the pump head assembly 10 is stably mounted on the drive unit 20.

[0047] In this application, the terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0048] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the preferred embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to encompass within their scope all such variations and modifications as are included within the scope of the application.

[0049] It is apparent that many modifications and variations of this application can be effected although only a few have been chosen for purposes of illustrative discussion. Thus, it is contemplated to cover the present application, including any alternatives, modifications, or equivalents falling within the scope of the claims.

Claims

1. A pump head quick detach quick mount type centrifugal pump, characterized in that, The pump head assembly, the driving unit and the fixing assembly are included; The pump head assembly includes a pump shell, and the pump shell includes a pump shell body and a mounting portion arranged on a circumferential surface of the pump shell body; The fixing assembly includes a first fixing ring, a second fixing ring and a rotating clamping structure; the first fixing ring and the second fixing ring are fixed on the driving unit at intervals; The rotating clamping structure is rotationally arranged between the first fixing ring and the second fixing ring; At least one clamping block is arranged on an end surface of the first fixing ring and / or the second fixing ring towards the rotating clamping structure; The rotating clamping structure includes a rotating clamping body and a first limiting portion; at least one clamping groove is arranged on both sides of the rotating clamping body close to the first fixing ring and / or the second fixing ring; when the rotating clamping structure rotates, the clamping block is clamped into the clamping groove; the lower end surface of the first limiting portion is in contact with the mounting portion, thereby limiting the pump head assembly.

2. The quick detachable and quick mount centrifugal pump according to claim 1, characterized in that, The rotating clamping structure further includes a second limiting portion; the second limiting portion is arranged on the lower end surface of the first limiting portion; the mounting portion is provided with a limiting groove with an opening away from the pump shell body; the second limiting portion can be accommodated in the limiting groove.

3. The quick detachable and quick mount centrifugal pump according to claim 1, characterized in that, A first opening groove is arranged on an upper end surface of the driving unit; a second opening groove is arranged on an end surface of the first fixing ring and the second fixing ring towards the rotating clamping structure; the first opening groove and the second opening groove jointly form a rotating limiting groove.

4. The quick detachable and quick mount centrifugal pump according to claim 3, characterized in that, A rotating shaft is arranged on a lower portion of the rotating clamping body; the rotating shaft is rotationally arranged in the rotating limiting groove.

5. The quick detachable and quick mount centrifugal pump according to claim 2, wherein, A first clamping portion is arranged on a side of the mounting portion away from the driving unit; the first clamping portion has a first inclined surface.

6. The quick detachable and quick mount centrifugal pump according to claim 5, wherein, A second clamping portion is arranged on an inner circumferential surface of the first fixing ring and / or the second fixing ring; a clamping groove is formed between the lower end surface of the second clamping portion and the upper end surface of the driving unit.

7. The quick detachable and quick mount centrifugal pump according to claim 6, characterized in that, The lower end surface of the second clamping portion is a second inclined surface, and the inclination direction of the second inclined surface is the same as that of the first inclined surface.

8. The quick detachable and quick mount centrifugal pump according to claim 6, wherein, The shape of the second clamping portion is matched with that of the limiting groove.

9. The quick-disassembly and quick-assembly centrifugal pump head of claim 1, wherein, The clamping block is a cylinder or a cuboid.

10. The quick-disassembly and quick-assembly centrifugal pump head of claim 1, wherein, There are two rotating clamping structures; one rotating clamping structure is arranged between the first end of the first fixing ring and the first end of the second fixing ring; the other rotating clamping structure is arranged between the second end of the first fixing ring and the second end of the second fixing ring.

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