Blending device

Abstract

The utility model relates to the technical field of in-vitro diagnostic equipment, in particular to a mixer which comprises a shell, the shell is provided with an inner cavity with one open end, and a liquid outlet is formed in the shell; the cover body is arranged at the open end of the inner cavity of the shell, and a plurality of liquid inlets are formed in the cover body; the blending core is arranged in an inner cavity of the shell, a first spiral groove and a second spiral groove which are opposite in rotation direction are formed in the outer side wall of the blending core, the first spiral groove and the second spiral groove are arranged in a staggered mode and communicated with each other, and a spiral flow channel is formed by the first spiral groove and the second spiral groove. Various liquids can be subjected to fluid reversing and crossed, converged, collided and uniformly mixed at the joints of the adjacent first spiral grooves and second spiral grooves, and are mixed for multiple times in the spiral flow channels, so that the uniform mixing effect is better, and the uniform mixing efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of in vitro diagnostic equipment, in particular to a mixer. Background Art

[0002] Sample analyzers have become the main equipment for clinical immunodiagnosis. During operation, sample analyzers need to continuously supply pure water and cleaning fluid, which is prepared by mixing concentrate and pure water in a liquid mixing system in a certain proportion.

[0003] A mixer is a key component in a liquid dispensing system. Its primary function is to ensure uniform mixing of various liquids or solutions during the dispensing process. Existing mixers typically use a single mixing method, such as traditional contact mixing and pumping mixing (e.g., stirring). These methods produce poor mixing results and low mixing efficiency. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a mixer to solve the problem of poor mixing effect and low mixing efficiency in the prior art.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a mixer, comprising:

[0006] A shell having an inner cavity with one end open and a liquid outlet provided on the shell;

[0007] A cover body is provided on the open end of the inner cavity of the shell, and the cover body is provided with a plurality of liquid inlets;

[0008] A mixing core is arranged in the inner cavity of the shell, and the outer wall of the mixing core is provided with a first spiral groove and a second spiral groove with opposite rotation directions. The first spiral groove and the second spiral groove are staggered and connected to each other. The first spiral groove and the second spiral groove form a spiral flow channel, and each of the liquid inlets is respectively connected to the first end of the spiral flow channel, and the liquid outlet is connected to the second end of the spiral flow channel.

[0009] Optionally, a first groove is provided on the first end surface of the mixing core, a first mixing cavity is formed between the inner wall of the first groove and the cover body, and the first end of the spiral flow channel and the liquid inlet are respectively connected to the first mixing cavity.

[0010] Optionally, a second groove and a first axial mixing hole extending through the thickness direction of the bottom wall of the first groove are provided on the bottom wall of the first groove, and the first axial mixing hole connects the first end of the spiral flow channel and the first mixing chamber. A first radial mixing hole extending through the thickness direction of the second groove is provided on the side wall of the second groove, and the first radial mixing hole connects the first end of the spiral flow channel and the first mixing chamber.

[0011] Optionally, the first axial mixing holes are multiple and evenly distributed along the circumferential direction of the bottom wall of the first groove, and the first radial mixing holes are multiple and evenly distributed along the circumferential direction of the side wall of the second groove.

[0012] Optionally, a second mixing chamber is formed between the second end surface of the mixing core and the inner wall of the shell, the second mixing chamber is connected to the liquid outlet, and the second end of the spiral flow channel and the liquid outlet are respectively connected to the second mixing chamber.

[0013] Optionally, a third groove is provided on the second end face of the mixing core, and a second radial mixing hole is provided on the side wall of the third groove extending through the thickness direction thereof, the second radial mixing hole connects the second end of the spiral flow channel and the second mixing chamber, and there are at least two second radial mixing holes arranged opposite to each other.

[0014] Optionally, the second radial mixing holes are multiple and evenly distributed along the circumferential direction of the side wall of the third groove.

[0015] Optionally, a first step portion is provided on the second end face of the mixing core, and a second step portion is provided on the inner cavity wall of the shell. The first step portion and the second step portion cooperate with each other, and a first seal is provided between the first step portion and the second step portion. The first step portion presses the first seal onto the second step portion.

[0016] Optionally, a second sealing member is provided between the cover and the shell, and the cover presses the second sealing member onto the open end of the inner cavity of the shell.

[0017] Optionally, a third sealing member is provided between the mixing core and the cover body, and the cover body presses the third sealing member tightly against the first end surface of the mixing core.

[0018] As described above, the mixer of the present invention has the following beneficial effects:

[0019] The outer wall of the mixing core is provided with a first spiral groove and a second spiral groove with opposite rotation directions. The first and second spiral grooves are staggered and interconnected, forming a spiral flow channel. Each liquid inlet is connected to the first end of the spiral flow channel, and the liquid outlet is connected to the second end of the spiral flow channel. The height difference between the vertically adjacent first and second spiral grooves ensures that the liquids between the first and second spiral grooves can more easily reverse direction and merge and collide for mixing. When the liquid enters the spiral flow channel from the upper end and exits from the lower end, gravity causes the liquids to flow downward faster, resulting in better mixing. At the junction of the adjacent first and second spiral grooves, the liquids undergo fluid reversal (changing the direction of fluid flow) and cross-convergence and collision mixing. That is, each time the liquids enter the adjacent second spiral groove from the first spiral groove, or from the second spiral groove into the first spiral groove, they undergo fluid reversal (changing the direction of fluid flow) and cross-convergence and collision mixing again. The multiple mixing of the liquids within the spiral flow channel improves the mixing effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall three-dimensional diagram of an embodiment of the utility model;

[0021] Figure 2 This is an overall exploded view of an embodiment of the present utility model;

[0022] Figure 3 This is a top view of the mixing core according to an embodiment of the present utility model;

[0023] Figure 4 This is an overall cross-sectional view of an embodiment of the present utility model;

[0024] Figure 5 This is a partial enlarged view of point B of an embodiment of the present utility model;

[0025] Figure 6 This is a front view of the mixing core according to an embodiment of the present utility model;

[0026] Figure 7 This is a cross-sectional view taken along line AA of an embodiment of the present invention.

[0027] Part Number Description

[0028] 51-housing; 511-liquid outlet; 512-second step;

[0029] 52-cover; 521-liquid inlet;

[0030] 53-mixing core; 531-first spiral groove; 532-second spiral groove;

[0031] 533 - first groove; 533a - first axial mixing hole; 534 - second groove; 534a - first radial mixing hole;

[0032] 535 - third groove; 535a - second radial mixing hole; 536 - first step;

[0033] 54 - first seal; 55 - third seal; 56 - second seal. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0035] It should be noted that the diagrams provided in this embodiment are only used to illustrate the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complex. The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the conditions for the implementation of the present invention, so they have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the effect and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0036] See Figures 1 to 7This embodiment provides a mixer, including a shell 51, a cover 52 and a mixing core 53. The shell 51, the cover 52 and the mixing core 53 can all be cylindrical in shape. The shell 51 has an inner cavity, and the top of the inner cavity is open, that is, the top of the shell 51 is open. The bottom end of the shell 51 is provided with a liquid outlet 511 that passes through the axial direction of the shell 51, and the liquid outlet 511 is connected to the inner cavity of the shell 51. The cover 52 is provided on the top of the shell 51 and can block the open end of the inner cavity of the shell 51. The cover 52 is provided with a plurality of liquid inlets 521 that pass through the thickness direction thereof, and all the liquid inlets 521 are respectively connected to the inner cavity of the shell 51. The mixing core 53 is provided in the inner cavity of the shell 51, and the outer diameter of the mixing core 53 is less than or equal to the inner diameter of the shell 51. The mixing core 53 can be completely accommodated in the inner cavity of the shell 51. The outer wall of the mixing core 53 is provided with a first spiral groove 531 and a second spiral groove 532 of opposite rotation directions. The first spiral groove 531 and the second spiral groove 532 are arranged alternately and interconnected, that is, the first spiral groove 531 and the second spiral groove 532 are arranged at intervals. The pitch of the first spiral groove 531 and the second spiral groove 532 can be equal or unequal, and the number of the first spiral groove 531 and the second spiral groove 532 can be set to multiple. The first spiral groove 531 and the second spiral groove 532 form a spiral flow channel, the structure of which is similar to the spiral groove structure on the outer wall of the reciprocating screw. Each liquid inlet 521 is connected to the first end of the spiral flow channel, and the liquid outlet 511 is connected to the second end of the spiral flow channel. When the first spiral groove 531 is located at the topmost end of the mixing core 53 along the axial direction, each liquid inlet 521 is connected to the first spiral groove 531 respectively; when the second spiral groove 532 is located at the topmost end of the mixing core 53 along the axial direction, each liquid inlet 521 is connected to the second spiral groove 532 respectively; when the first spiral groove 531 is located at the bottommost end of the mixing core 53 along the axial direction, the liquid outlet 511 is connected to the first spiral groove 531; when the second spiral groove 532 is located at the bottommost end of the mixing core 53 along the axial direction, the liquid outlet 511 is connected to the second spiral groove 532.

[0037] In this embodiment, the outer wall of the mixing core 53 is provided with a first spiral groove 531 and a second spiral groove 532 with opposite rotation directions. The first spiral groove 531 and the second spiral groove 532 are staggered and connected to each other, and the first spiral groove 531 and the second spiral groove 532 form a spiral flow channel. Each liquid inlet 521 is connected to the first end of the spiral flow channel, and the liquid outlet 511 is connected to the second end of the spiral flow channel. Various liquids enter the spiral flow channel through the liquid inlet 521 for mixing and are then discharged through the liquid outlet 511. There is a height difference between the first spiral groove 531 and the second spiral groove 532 adjacent in the vertical direction, which ensures that the liquid between the first spiral groove 531 and the second spiral groove 532 is easier to achieve reversal and convergence collision mixing. When the liquid enters from the upper end of the spiral flow channel and exits from the lower end, under the action of gravity, the downward flow rate of the various liquids is faster and the mixing effect is better. At the connection between the adjacent first spiral groove 531 and the second spiral groove 532, various liquids will undergo fluid reversal (changing the direction of fluid flow) and cross-convergence collision mixing. That is, each time various liquids enter the adjacent second spiral groove 532 from the first spiral groove 531, or enter the first spiral groove 531 from the second spiral groove 532, they will again undergo fluid reversal (changing the direction of fluid flow) and cross-convergence collision mixing. Various liquids are mixed multiple times in the spiral flow channel, resulting in better mixing effect and higher mixing efficiency. Liquids can also enter from the bottom end of the spiral flow channel and flow out from its top. For some relatively thick liquids, this mixing method is more effective and more efficient.

[0038] In one embodiment, Figure 1 and Figure 2 As shown, the cover 52 and the housing 51 can be fastened by setting fasteners, and the fasteners include bolts and the like.

[0039] In one embodiment, Figure 4 As shown, the liquid outlet 511 and each liquid inlet 521 can be a through hole, and connectors can be provided in the liquid outlet 511 and each liquid inlet 521 respectively to facilitate connection with other external mechanisms.

[0040] In one embodiment, Figure 4 and Figure 7As shown, a circular first groove 533 is defined on the top end surface of the mixing core 53, and the first groove 533 is concentrically arranged with the top end surface of the mixing core 53. A first mixing chamber is formed between the inner wall of the first groove 533 and the bottom end surface of the cover 52. The top end of the spiral flow channel and the liquid inlet 521 are respectively connected to the first mixing chamber. In other words, the first mixing chamber connects the top end of the spiral flow channel and each liquid inlet 521. Liquid entering from each liquid inlet 521 is first mixed in the first mixing chamber formed between the inner wall of the first groove 533 and the bottom end surface of the cover 52. This allows the multiple miscible liquids to self-mix through mutual collision, thereby improving the mixing effect and efficiency.

[0041] In one embodiment, Figure 4 and Figure 7 As shown, a circular second groove 534 is provided on the bottom wall of the first groove 533. The diameter of the second groove 534 is smaller than that of the first groove 533, and the first groove 533 and the second groove 534 are arranged concentrically. A first axial mixing hole 533a is also provided on the bottom wall of the first groove 533, extending through the thickness thereof. The first axial mixing hole 533a can be arranged axially along the bottom wall of the first groove 533, or eccentrically. The first axial mixing hole 533a connects the first end of the spiral flow channel with the first mixing chamber. A first radial mixing hole 534a is provided on the side wall of the second groove 534, extending through the thickness thereof. The first radial mixing hole 534a can be arranged radially along the side wall of the second groove 534, or eccentrically. The first radial mixing hole 534a connects the first end of the spiral flow channel with the first mixing chamber. The first axial mixing hole 533a and the first radial mixing hole 534a can be arranged correspondingly along the circumference of the first groove 533, or spaced apart along the circumference of the first groove 533. The liquid passing through the first axial mixing hole 533a flows downward, and the liquid passing through the first radial mixing hole 534a flows horizontally. Since the first axial mixing hole 533a and the first radial mixing hole 534a are arranged correspondingly along the circumference of the first groove 533, there is intersection between the liquid passing through the first axial mixing hole 533a and the liquid passing through the first radial mixing hole 534a, so that the liquids collide with each other and are self-mixed, thereby improving the mixing effect and mixing efficiency.

[0042] In one embodiment, Figure 4 and Figure 7As shown, a plurality of first axial mixing holes 533a are uniformly distributed along the circumference of the bottom wall of the first groove 533. The number of first axial mixing holes 533a is multiple and uniformly distributed along the circumference of the bottom wall of the first groove 533. A plurality of first radial mixing holes 534a are uniformly distributed along the circumference of the sidewall of the second groove 534. The number of first radial mixing holes 534a is multiple and uniformly distributed along the circumference of the sidewall of the second groove 534. Each first axial mixing hole 533a corresponds to each first radial mixing hole 534a along the circumference of the first groove 533; alternatively, each first axial mixing hole 533a and each first radial mixing hole 534a are spaced apart along the circumference of the first groove 533. By providing a plurality of corresponding first axial mixing holes 533a and first radial mixing holes 534a, more cross-collision opportunities are provided for various miscible liquids, thereby improving the mixing effect and efficiency.

[0043] In one embodiment, Figure 4 As shown, a second mixing chamber is formed between the second end surface of the mixing core 53 and the inner wall of the housing 51. Furthermore, a second mixing chamber is formed between the bottom end surface of the mixing core 53 and the bottom of the inner wall of the housing 51. The second mixing chamber is connected to the liquid outlet 511. The second end of the spiral flow channel and the liquid outlet 511 are respectively connected to the second mixing chamber. In other words, the second mixing chamber connects the bottom end of the spiral flow channel and the liquid outlet 511. Liquid flowing out of the spiral flow channel enters the second mixing chamber, where it undergoes further self-mixing through collision, further improving the mixing effect and efficiency.

[0044] In one embodiment, Figure 4 and Figure 7 As shown, a third groove 535 is provided on the second end surface of the mixing core 53, that is, a circular third groove 535 is provided on the bottom end surface of the mixing core 53, and the third groove 535 is arranged concentrically with the bottom end surface of the mixing core 53. A second radial mixing hole 535a is provided on the side wall of the third groove 535, which runs through the thickness direction of the third groove 535. The second radial mixing hole 535a can be arranged radially along the side wall of the third groove 535, or it can be arranged eccentrically. The second radial mixing hole 535a connects the second end of the spiral flow channel and the second mixing chamber, and there are at least two second radial mixing holes 535a arranged opposite each other. The liquid flows out from the two oppositely arranged second radial mixing holes 535a and cross-mixes, so that the miscible liquids are self-mixed through mutual collision, thereby improving the mixing effect and efficiency.

[0045] In one embodiment, Figure 4 and Figure 7As shown, the second radial mixing holes 535a are multiple and evenly distributed along the circumferential direction of the sidewall of the third groove 535. The number of the second radial mixing holes 535a is multiple and evenly distributed along the circumferential direction of the sidewall of the third groove 535. By increasing the number of the second radial mixing holes 535a, more cross-collision opportunities are provided for various miscible liquids, thereby improving the mixing effect and efficiency.

[0046] In one embodiment, Figures 4 to 7 As shown, a first step 536 is provided on the second end surface of the mixing core 53, that is, the first step 536 is provided on the bottom end surface of the mixing core 53. A second step 512 is provided on the bottom of the inner wall of the housing 51. The first step 536 and the second step 512 cooperate with each other. A first sealing member 54 is provided between the first step 536 and the second step 512. The first step 536 presses the first sealing member 54 against the second step 512. The first sealing member 54 comprises a sealing ring. The provision of the first sealing member 54 can seal between the bottom outer wall of the mixing core 53 and the inner wall of the housing 51, preventing the liquid in the spiral flow channel from flowing directly from the outer wall of the mixing core 53 and the inner wall of the housing 51 to the liquid outlet 511, thereby affecting the mixing effect.

[0047] In one embodiment, Figure 2 、 Figure 4 and Figure 5 As shown, a second seal 56 is disposed between the bottom end surface of the cover 52 and the top end surface of the housing 51. The cover 52 presses the second seal 56 against the open end of the inner cavity of the housing 51. A sealing groove is disposed on the top end surface of the housing 51, and the second seal 56 is disposed within the sealing groove. The second seal 56 seals the bottom end surface of the cover 52 and the top end surface of the housing 51, preventing liquid from leaking out from between the bottom end surface of the cover 52 and the top end surface of the housing 51.

[0048] In one embodiment, the bottom surface of the cover 52 is provided with a downwardly extending annular protrusion. A groove in the cover 52 is disposed within the annular protrusion. The annular protrusion extends into the first groove 533, and the outer wall of the annular protrusion abuts against the inner wall of the first groove 533. The groove in the cover 52 communicates with each liquid inlet 521 and also with the first groove 533, increasing the volume of the first mixing chamber and thereby enhancing the mixing effect. The annular protrusion also serves to position the cover 52 and the mixing core 53.

[0049] In one embodiment, a third sealing member 55 is provided between the mixing core 53 and the cover 52 . A groove for accommodating the third sealing member 55 is provided on the bottom surface of the cover 52 . The cover 52 presses the third sealing member 55 against the top surface of the mixing core 53 .

[0050] In one embodiment, Figure 2 and Figure 4 As shown, the third sealing member 55 may also be disposed between the outer wall of the annular protrusion on the bottom end surface of the cover body 52 and the inner wall of the first groove 533 , thereby improving the sealing effect and the fixing effect of the third sealing member 55 .

[0051] In one embodiment, both ends of the inner cavity of the shell 51 are open, and a lower cover is provided at the bottom end of the shell 51 to seal the bottom opening of the inner cavity of the shell 51.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A mixer, characterized in that: include: A shell having an inner cavity with one end open and a liquid outlet provided on the shell; A cover body is provided on the open end of the inner cavity of the shell, and the cover body is provided with a plurality of liquid inlets; A mixing core is arranged in the inner cavity of the shell, and the outer wall of the mixing core is provided with a first spiral groove and a second spiral groove with opposite rotation directions. The first spiral groove and the second spiral groove are staggered and connected to each other. The first spiral groove and the second spiral groove form a spiral flow channel, and each of the liquid inlets is respectively connected to the first end of the spiral flow channel, and the liquid outlet is connected to the second end of the spiral flow channel.

2. The mixer according to claim 1, characterized in that A first groove is provided on the first end surface of the mixing core, a first mixing cavity is formed between the inner wall of the first groove and the cover body, and the first end of the spiral flow channel and the liquid inlet are respectively connected to the first mixing cavity.

3. The mixer according to claim 2, characterized in that A second groove and a first axial mixing hole extending through the thickness direction of the bottom wall of the first groove are provided on the bottom wall of the first groove, and the first axial mixing hole connects the first end of the spiral flow channel and the first mixing chamber. A first radial mixing hole extending through the thickness direction of the second groove is provided on the side wall of the second groove, and the first radial mixing hole connects the first end of the spiral flow channel and the first mixing chamber.

4. The mixer according to claim 3, characterized in that The first axial mixing holes are multiple and evenly distributed along the circumferential direction of the bottom wall of the first groove, and the first radial mixing holes are multiple and evenly distributed along the circumferential direction of the side wall of the second groove.

5. The mixer according to claim 1, characterized in that A second mixing cavity is formed between the second end surface of the mixing core and the inner cavity wall of the shell. The second mixing cavity is connected to the liquid outlet. The second end of the spiral flow channel and the liquid outlet are respectively connected to the second mixing cavity.

6. The mixer according to claim 5, characterized in that A third groove is provided on the second end surface of the mixing core, and a second radial mixing hole is provided on the side wall of the third groove, which runs through the thickness direction thereof. The second radial mixing hole connects the second end of the spiral flow channel and the second mixing cavity, and there are at least two second radial mixing holes arranged opposite to each other.

7. The mixer according to claim 6, characterized in that The second radial mixing holes are multiple and evenly distributed along the circumferential direction of the side wall of the third groove.

8. The mixer according to claim 1, characterized in that A first step portion is provided on the second end surface of the mixing core, and a second step portion is provided on the inner cavity wall of the shell. The first step portion and the second step portion cooperate with each other, and a first seal is provided between the first step portion and the second step portion. The first step portion presses the first seal onto the second step portion.

9. The mixer according to claim 1, characterized in that A second sealing member is provided between the cover and the shell, and the cover presses the second sealing member tightly against the open end of the inner cavity of the shell.

10. The mixer according to claim 1, characterized in that A third sealing member is provided between the mixing core and the cover body, and the cover body presses the third sealing member tightly against the first end surface of the mixing core.

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