阅读说明：本技术 一种低速冷冻离心机 (Low-speed freezing centrifuge ) 是由 付小梅 于 2019-12-14 设计创作，主要内容包括：本发明公开了一种低速冷冻离心机,其结构包括壳体、封口装置、活动盖、台面、控制面板,壳体上设有活动盖,活动盖上设有封口装置,封口装置与活动盖相连接,活动盖与壳体活动连接,台面位于壳体顶部,控制面板与活动盖均安装在台面上,台面与壳体呈一体化结构设立,本发明的有益效果：通过活塞体旋转并借助连接杆带动卡块随之运动,使得卡块在环形轨道上滑动,由于凸起呈四分之一球状实心设立,并且竖直一面与工作腔口相贴近,将活塞体与工作腔口之间隔开,并使得活塞体与工作腔口之间的距离始终不变,避免卡块在环形轨道上滑动的过程中发生位移,对其运动轨迹进行进一步限定,实现活动盖与工作腔口固定。(The invention discloses a low-speed freezing centrifuge, which structurally comprises a shell, a sealing device, a movable cover, a table board and a control panel, wherein the shell is provided with the movable cover, the movable cover is provided with the sealing device, the sealing device is connected with the movable cover, the movable cover is movably connected with the shell, the table board is positioned at the top of the shell, the control panel and the movable cover are both arranged on the table board, and the table board and the shell are arranged in an integrated structure, so that the centrifuge has the beneficial effects that: the piston body rotates and drives the clamping block to move along with the connecting rod, so that the clamping block slides on the annular track, the protrusion is in a quarter-sphere shape and is arranged, the vertical surface is close to the working cavity opening, the piston body is separated from the working cavity opening, the distance between the piston body and the working cavity opening is constant all the time, the clamping block is prevented from moving in the sliding process on the annular track, the movement track of the clamping block is further limited, and the movable cover is fixed with the working cavity opening.)

1. The utility model provides a low-speed refrigerated centrifuge, its structure includes casing (1), closing device (2), movable cover (3), mesa (4), control panel (5), its characterized in that:

the novel multifunctional table top is characterized in that a movable cover (3) is arranged on the shell (1), a sealing device (2) is arranged on the movable cover (3), the sealing device (2) is connected with the movable cover (3), the movable cover (3) is movably connected with the shell (1), the table top (4) is positioned at the top of the shell (1), the control panel (5) and the movable cover (3) are both arranged on the table top (4), and the table top (4) and the shell (1) are arranged in an integrated structure;

the sealing device (2) is composed of a filling mechanism (a), a fixing mechanism (b) and a working cavity opening (c), the filling mechanism (a) is matched with the fixing mechanism (b), the fixing mechanism (b) is installed on the edge of the movable cover (3), and the fixing mechanism (b) is connected with the working cavity opening (c).

2. The low-speed freezing centrifuge as set forth in claim 1, wherein: the filling mechanism (a) is composed of an expansion link (a 1), a movable plate (a 2), a negative pressure fan (a 3), a conveying pipeline (a 4), an air bag (a 5), a sealing plate (a 6) and a sealing plate cavity (a 7), wherein the expansion link (a 1) is fixedly connected with the movable plate (a 2), the negative pressure fan (a 3) is connected with the conveying pipeline (a 4), the conveying pipeline (a 4) is communicated with the air bag (a 5), the air bag (a 5) is connected with the sealing plate (a 6), the sealing plate (a 6) is arranged in the sealing plate cavity (a 7), and the sealing plate cavity (a 7) is connected with the fixing mechanism (b).

3. The low-speed freezing centrifuge as set forth in claim 1, wherein: the fixing mechanism (b) is composed of an annular track (b 1), a connecting rod (b 2), a clamping block (b 3) and a piston body (b 4), a clamping block (b 3) is arranged in the annular track (b 1), the clamping block (b 3) is in mechanical sliding fit with the annular track (b 1), the clamping block (b 3) is in mechanical welding with the connecting rod (b 2), and the connecting rod (b 2) is fixedly connected with the piston body (b 4).

4. A low-speed freezing centrifuge as claimed in claim 3, wherein: the clamping block (b 3) is composed of a protrusion (b 31), a clamping plate (b 32) and a limiting block (b 33), the protrusion (b 31) is arranged on the clamping plate (b 32), the clamping plate (b 32) is fixedly connected with a connecting rod (b 2), and the limiting block (b 33) is mechanically welded with the clamping plate (b 32).

5. The low-speed freezing centrifuge as set forth in claim 2, wherein: the sealing plate (a 6) is fixedly connected with one end connected with the air bag (a 5) through glue, and one end, away from the air bag (a 5), of the sealing plate (a 6) is arranged in an arc shape, so that the edge of the sealing plate (a 6) is attached to the inner diameter of the working cavity opening (c), and the tight connection between the working cavity opening (c) and the sealing plate (a 6) is realized.

Technical Field

The invention relates to the field of biological centrifugation, in particular to a low-speed freezing centrifuge.

Background

When the material of different densities separates, traditional mode reaches the purpose through deposiing, but traditional mode time of deposiing is longer, in order to satisfy the experiment time demand in the laboratory, obtains the layering liquid of different density materials with the help of low-speed freezing centrifuge to the separation that carries out the material, and present low-speed freezing centrifuge has following defect:

the existing low-speed freezing centrifugal machine freezes by setting up two sets of freezing pipes, realizes that the test tube outside freezes simultaneously with interior survey, and the connection sealing degree between the bin cover of working bin and the bin body is poor, makes the low-temperature gas in the working bin leak easily, has aggravated refrigerating system's work load, and is easily frostbitten when low-temperature gas leaks staff's skin and touches the bin cover.

Disclosure of Invention

Aiming at the defects of the prior art, the invention is realized by the following technical scheme: a low-speed freezing centrifuge structurally comprises a shell, a sealing device, a movable cover, a table board and a control panel, wherein the movable cover is arranged on the shell, the sealing device is arranged on the movable cover and connected with the movable cover, the movable cover is movably connected with the shell, the table board is positioned at the top of the shell, the control panel and the movable cover are both arranged on the table board, and the table board and the shell are in an integrated structure;

the sealing device is composed of a filling mechanism, a fixing mechanism and a working cavity opening, wherein the filling mechanism is matched with the fixing mechanism, the fixing mechanism is installed on the edge of the movable cover, and the fixing mechanism is connected with the working cavity opening.

As a further optimization of the invention, the filling mechanism is composed of a telescopic rod, a movable plate, a negative pressure fan, two conveying pipelines, an air bag, a sealing plate and a sealing plate cavity, wherein the telescopic rod is fixedly connected with the movable plate, the movable plate is circularly arranged, the negative pressure fans are symmetrically arranged on two sides of the cavity where the movable plate is located, the negative pressure fan is connected with the conveying pipelines, the conveying pipelines are communicated with the air bag, the air bag is arranged on one end, far away from the negative pressure fan, of the conveying pipelines, the air bag is connected with the sealing plate, the sealing plate is arranged in the sealing plate cavity, and the sealing plate cavity is connected with the fixing mechanism.

As a further optimization of the invention, the fixing mechanism comprises three annular rails, connecting rods, fixture blocks and a piston body, the three annular rails are equally distributed by taking the center of the piston body as the center of a circle, the top view of the piston body is circular, the fixture blocks are arranged in the annular rails, the fixture blocks are in mechanical sliding fit with the annular rails, the fixture blocks are mechanically welded with the connecting rods, the fixture blocks are positioned on one end of the connecting rods, which is far away from the piston body, and the connecting rods are fixedly connected with the piston body.

The clamping block is further optimized to be composed of a protrusion, a clamping plate and a limiting block, the protrusion is arranged on the clamping plate, the clamping plate is fixedly connected with the connecting rod, the protrusion is located at the connecting position of the clamping plate and the connecting rod, the protrusion is arranged in a quarter-sphere shape and is solid, the limiting block is mechanically welded with the clamping plate, and the limiting block is located at the bottom of the clamping plate.

As a further optimization of the invention, one end of the sealing plate, which is connected with the air bag, is fixedly connected through glue, and one end of the sealing plate, which is far away from the air bag, is arranged in an arc shape, so that the edge of the sealing plate is conveniently attached to the inner diameter of the working cavity opening, and the tight connection of the working cavity opening and the sealing plate is realized.

Advantageous effects

The invention relates to a low-speed freezing centrifuge, which is characterized in that a substance to be cooled and centrifugally frozen is placed in a working cavity in a shell, a movable cover is covered to enable the movable cover to be embedded with a working cavity opening, the movable cover is rotated clockwise, a piston body is rotated and drives a clamping block to move along with the piston body through a connecting rod, the clamping block slides on an annular track, the clamping block stops sliding on a zero boundary line of the annular track, when the clamping block slides on the annular track, the piston body is separated from the working cavity opening because a bulge is arranged in a quarter-sphere-shaped solid shape and the vertical surface is close to the working cavity opening, the distance between the piston body and the working cavity opening is constant all the time, the clamping block is prevented from displacing in the sliding process on the annular track, the movement track of the clamping block is further limited, the movable cover can be accurately clamped on the working cavity opening and the corresponding annular track, the movable cover is fixed with the working cavity opening, the movable plate is pressed downwards, the telescopic rod is stressed to contract, the negative pressure fans on two sides of the position where the movable plate is located are exposed, the negative pressure fans suck external air where the movable plate is located and convey the air into the air bag through the conveying pipeline, the air bag is filled and expanded, the sealing plate is pushed out, the sealing plate is attached to the sealing plate cavity, and sealing closure between the movable cover and the working cavity opening is achieved.

Compared with the prior art, the invention has the following advantages:

the invention drives the clamping block to move along with the piston body by virtue of the rotation of the piston body and the connecting rod, so that the clamping block slides on the annular track, because the bulge is solid in a quarter sphere shape and the vertical surface is close to the working cavity opening to separate the piston body and the working cavity opening, and the distance between the piston body and the working cavity opening is always constant, so that the displacement of the clamping block in the sliding process on the annular track is avoided, further limiting the movement track of the movable cover, fixing the movable cover and the working cavity opening, sucking the outside air at the position of the movable plate by using a negative pressure fan and filling the air bag, expanding the air bag to push the sealing plate to the sealing plate cavity, therefore, the seal between the movable cover and the working cavity opening is closed, the skin of an operator can be prevented from being frostbitten due to the leakage of low-temperature cold air in the working cavity, and the working safety coefficient of the refrigerated centrifuge is further improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a low-speed freezing centrifuge according to the present invention.

FIG. 2 is a top view of a sealing device of a low-speed freezing centrifuge according to the present invention.

FIG. 3 is a top view of a fixing mechanism of a low-speed freezing centrifuge according to the present invention.

FIG. 4 is a cross-sectional view of a filling mechanism of a low-speed freezing centrifuge according to the present invention.

Fig. 5 is a diagram of the operation state of fig. 4.

FIG. 6 is a block structure diagram of a low-speed freezing centrifuge according to the present invention.

In the figure, a shell body-1, a sealing device-2, a movable cover-3, a table top-4, a control panel-5, a filling mechanism-a, a fixing mechanism-b, a working cavity opening-c, an expansion rod-a 1, a movable plate-a 2, a negative pressure fan-a 3, a conveying pipeline-a 4, an air bag-a 5, a sealing plate-a 6, a sealing plate cavity-a 7, an annular track-b 1, a connecting rod-b 2, a clamping block-b 3, a piston body-b 4, a protrusion-b 31, a clamping plate-b 32 and a limiting block-b 33.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.