CN111965000A - A fully automatic cryo-meter with fixing device - Google Patents

Abstract

The invention relates to the technical field of cryogenic instruments, in particular to an automatic cryogenic instrument with a fixing device, comprising a casing, a sample grid, a lifting mechanism and a fixing mechanism; a cryogenic box is fixed on the inner side wall of the top end of the casing; A sealing mechanism is arranged inside the cryobox; the sample grid is fixed on the top of the lifting mechanism; the fixing mechanism is installed inside the sample grid; the lifting mechanism is installed inside the casing, including an electric push rod, a straight rod and a hinged rod; The electric push rod is fixed on the inner side wall of the bottom end of the casing; the straight rod is fixed on the outer side wall of the electric push rod; one end of the hinge rod is hinged with the straight rod, and the other end is hinged with the sealing mechanism; And the lifting mechanism keeps the samples in the sample grid in order, and reduces the risk of samples falling into absolute ethanol.

Description

A fully automatic cryo-meter with fixing device

technical field

The invention relates to the technical field of cryogenic instruments, in particular to an automatic cryogenic instrument with a fixing device.

Background technique

When the metal sample is subjected to the mechanical property impact test, the sample to be tested needs to be treated at a low temperature for not less than 20 minutes in advance. The low-temperature medium is generally selected from anhydrous ethanol, and the sample is placed inside the sample grid to maintain the distance between the samples to be tested; At the end of the setting, the sample should be clamped from the sample grid with a clamp, and the impact test should be carried out within five seconds.

The surface of the existing sample grid is smooth. If many samples are placed inside the sample grid at the same time, the sliding sequence of the sample to be tested is easily disrupted during the standing process. There is a certain danger in picking up the sample, and it is very easy to fall during the clamping process. If it is dropped in the low-temperature anhydrous ethanol medium, sputtering will occur, which will easily cause injury to the test personnel.

SUMMARY OF THE INVENTION

In order to make up for the deficiencies of the prior art, the present invention proposes an automatic cryogenic instrument with a fixing device.

The technical solution adopted by the present invention to solve the technical problem is as follows: an automatic cryogenic instrument with a fixing device according to the present invention includes a casing, a sample grid, a lifting mechanism and a fixing mechanism; A low temperature box is connected; a sealing mechanism is arranged inside the low temperature box; the sample grid is fixed on the top of the lifting mechanism; the fixing mechanism is installed inside the sample grid; the lifting mechanism is installed inside the casing, including an electric push rod , straight rod and hinged rod; the electric push rod is fixed on the inner side wall of the bottom end of the housing; the straight rod is fixed on the outer side wall of the electric push rod; one end of the hinge rod is hinged with the straight rod, and the other end is connected with the The sealing mechanism is hinged; when working, the product is cryogenically treated by adding absolute ethanol to the cryobox, and when the sample grid is not moving, the sample is placed in the sample groove, so that the sample will not slide freely in the sample grid , so as to avoid the confusion of the samples placed in the sample grid. When the sample grid moves up and down, start the electric push rod, and realize the lifting and lowering of the sample grid through the driving force of the electric push rod. When lifting, the fixed mechanism inside the sample grid is used. The sample is fixed so that the sample does not slide during the lifting and lowering of the sample grid.

Preferably, the sealing mechanism includes a sliding rod, an elastic rod, an extrusion block and a sealing ring; a cavity is provided inside the cryogenic box; the sealing ring is fixed on the inner side wall of the cavity; the extrusion block is installed On the outer side wall of the sealing ring; one end of the elastic rod is rotatably connected to the inner side wall of the cavity, and the other end is hinged with the extrusion block; the sliding rod is fixed on the end of the elastic rod away from the extrusion block; the sliding block slides Connected inside the sliding rod; the hinge rod is hinged with the slider; when the electric push rod is rising, the straight rod pushes the hinge rod to squeeze the slider, the slider slides, and the slider drives the elastic rod in the cavity Rotate, so that the extrusion block hinged with the elastic rod is subjected to the pressure from the elastic rod, so that the extrusion block squeezes the sealing ring, so that the sealing ring is close to the side wall of the electric push rod, thereby preventing the liquid contained in the cryobox from moving. Leakage, so that the electric push rod has a good sealing effect during operation, so as to play a waterproof role on the components on the inner side wall of the bottom end of the casing.

Preferably, the inner side wall of the bottom end of the sample grid is provided with a sample groove; the fixing mechanism includes a transmission assembly, a rectangular block, a first chute and a fixing rod; the transmission assembly is installed inside the sample grid; the rectangular block is fixed Connected to the inside of the sample fence, its inner side wall is slidably connected with a sliding plate, and a push assembly is arranged inside; the first chute is arranged on the inner side wall of the sample tank; the fixing rod is slidably connected inside the first chute; during operation , when the electric push rod moves, it drives the transmission assembly to move, so that the slide plate slides inside the rectangular block, and the side wall of the slide plate is connected with the push assembly through a string, which drives the push assembly to move, so that the sliding connection inside the first chute is fixed. The rod slides out, so as to squeeze the side wall of the sample piece to ensure the stability of the sample during the lifting process, so as to avoid the sample sliding during the lifting process.

Preferably, the transmission assembly includes a second chute, a first air bag and a pressing plate; the second chute is arranged inside the side wall of the sample grid; the first air bag is fixed on the side wall of the second chute , communicated with the interior of the rectangular block; the extrusion plate is slidably connected inside the second chute, and its side wall is connected with the inner side wall of the cryogenic box through an elastic rope; during operation, when the electric push rod moves, the extrusion plate is The elastic rope connected on the side wall is tightened, thereby pulling the pressing plate to slide in the second chute. During the sliding process of the pressing plate, the pressing plate squeezes the first air bag, so that the gas in the first air bag is Push the slide plate to slide, and then drive the push component to work, so that the ejector rod in the first chute fixes the sample, so that the sample will not slide during the rising process, thereby ensuring the order of the sample inside the sample grid.

Preferably, the push assembly includes a top rod, a trapezoidal block and a second air bag; the top rod is slidably connected inside the rectangular block through a spring; the trapezoidal block is slidably connected to the inner side wall of the rectangular block, and its top end is connected by a string connected with the slide plate; the second air bag is fixed on the inner side wall of the rectangular block and communicated with the inside of the first chute; during operation, when the transmission component pushes the slide plate to slide, the string connected on the side wall of the slide plate pulls the trapezoidal block to carry out Slide up, under the elastic force of the spring, the ejector rod slides inside the rectangular block, and the ejector rod squeezes the second air bag, so that the gas in the second air bag is ejected from the first chute, pushing the fixed rod to slide, and then the The sample is fixed.

Preferably, a third chute and a fourth chute are arranged inside the side wall of the low temperature box; a third airbag is fixedly connected to the inner sidewall of the third chute, and a rectangular plate is slidably connected; the third airbag is connected to the The fourth chute is connected internally; the rectangular plate is slidably connected inside the third chute, and a limit rope is fixed to its side wall; the other end of the limit rope is fixed to the inner side wall of the low temperature box; the fourth slide A T-shaped rod is slidably connected in the groove; during operation, when the sample grid rises to a certain height, the sample grid squeezes the limit rope, so that the limit rope pulls the rectangular plate in the third chute to slide, so that the rectangular plate is squeezed The third air bag, the gas in the third air bag is ejected from the fourth chute, thereby pushing the T-shaped rod to move, and the string at the top of the T-shaped rod pulls the knife, so that the electric push rod is powered off, and then the electric push rod is powered off. The movement of the rod is controlled.

Preferably, the electric push rod is connected with a No. 1 line and a No. 2 line; the end of the T-shaped rod is connected with the knife through a string; during operation, when the sample grid needs to be lifted, the knife is closed, so that the electric The push rod is energized and moved, thereby pushing the sample grid to rise. When the sample grid rises to a certain height, the electric push rod is powered off by the action of the limit rope, so as to realize the control of the electric push rod, so as to make the sample grid go up and down. More intelligent, reducing the workload of manual operation.

Preferably, the end of the fixing rod is fixed with a rubber block; during operation, when the sample grid is in the rising process, the sample is fixed by the fixing mechanism to avoid sample confusion caused by the sliding of the sample during the rising process, and the end of the fixing rod is The fixed rubber block can reduce the wear between the fixing rod and the sample, and the rubber has a certain anti-slip effect, so that the fixing rod and the side wall of the sample will not slip, so that the fixing effect is better.

The beneficial effects of the present invention are as follows:

1. A kind of automatic cryometer with a fixing device of the present invention, when the transmission assembly pushes the slide plate to slide, the string connected on the side wall of the slide plate pulls the trapezoidal block to slide up, and under the elastic force of the spring, the top is The rod slides inside the rectangular block, and the ejector rod squeezes the second air bag, so that the gas in the second air bag is ejected from the first chute, pushing the fixing rod to slide, and then fixing the sample to ensure that the sample inside the sample grid has the same sample. sequence.

2. In a fully automatic cryogenic instrument with a fixing device according to the present invention, during the ascending process of the electric push rod, the straight rod pushes the hinge rod to squeeze the sliding block, the sliding block slides, and the sliding rod drives the elastic rod to move in the cavity. Rotate, so that the extrusion block hinged with the elastic rod is subjected to the pressure from the elastic rod, so that the extrusion block squeezes the sealing ring, so that the sealing ring is close to the side wall of the electric push rod, so that the electric push rod has good performance during operation. sealing effect.

3. When the sample grid rises to a certain height, the sample grid squeezes the limit rope, so that the limit rope pulls the rectangular plate in the third chute to slide, so that the rectangular plate squeezes the third air bag and the gas in the third air bag. It is ejected from the fourth chute, thereby pushing the T-shaped rod to move, and the string at the top of the T-shaped rod pulls the knife, so that the electric push rod is powered off, and then the movement of the electric push rod is controlled.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the overall view of a kind of automatic cryometer with fixing device of the present invention;

2 is a partial cross-sectional view of a fully automatic cryometer with a fixing device of the present invention;

Figure 3 is a partial cross-sectional view of the sample grid;

Fig. 4 is a partial enlarged view at A in Fig. 2;

Fig. 5 is a partial enlarged view at B in Fig. 2;

Fig. 6 is a partial enlarged view at C in Fig. 3;

Fig. 7 is a partial enlarged view at D in Fig. 3;

In the figure: 1. Housing; 2. Sample grid; 21. Sample slot; 3. Lifting mechanism; 31. Electric push rod; 311, Line 1; 312, Line 2; 32, Straight rod; 41, the second chute; 412, the first air bag; 413, the extrusion plate; 42, the rectangular block; 43, the first chute; 44, the fixing rod; 441, the rubber block; 45, slide plate; 46, push assembly; 461, ejector rod; 462, trapezoidal block; 463, second air bag; 5, cryogenic box; 51, cavity; 52, third chute; 53, fourth chute ; 54, the third air bag; 55, rectangular plate; 56, limit rope; 57, T-bar; 6, sealing mechanism; 61, slide bar; 62, slider; 63, elastic bar; 64, extrusion block; 65. Sealing ring.

Detailed ways

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific embodiments.

As shown in FIG. 1 to FIG. 7 , an automatic cryometer with a fixing device according to the present invention includes a casing 1 , a sample grid 2 , a lifting mechanism 3 and a fixing mechanism 4 ; A low temperature box 5 is fixedly connected; a sealing mechanism 6 is arranged inside the low temperature box 5; the sample grid 2 is fixed on the top of the lifting mechanism 3; the fixing mechanism 4 is installed inside the sample grid 2; the lifting mechanism 3 is installed Inside the housing 1, it includes an electric push rod 31, a straight rod 32 and a hinged rod 33; the sample grid 2 is fixed on the top of the electric push rod 31; the electric push rod 31 is fixed on the inner side wall of the bottom end of the casing 1 The straight rod 32 is fixed on the outer wall of the electric push rod 31; one end of the hinge rod 33 is hinged with the straight rod 32, and the other end is hinged with the sealing mechanism 6; Ethanol is used to treat the product at a low temperature. When the sample grid 2 is not moving, the sample is placed in the sample groove 21, so that the sample will not slide freely in the sample grid 2, so as to avoid confusion of the samples placed in the sample grid 2. , when the sample grid 2 moves up and down, start the electric push rod 31, and realize the lifting and lowering of the sample grid 2 through the driving force of the electric push rod 31. When lifting, the sample is fixed by the fixing mechanism 4 inside the sample grid 2. Therefore, the sample will not slide during the lifting and lowering process of the sample grid 2 .

As an embodiment of the present invention, the sealing mechanism 6 includes a sliding rod 61, an elastic rod 63, a pressing block 64 and a sealing ring 65; the low temperature box 5 is provided with a cavity 51; the sealing ring 65 is fixed connected to the inner side wall of the cavity 51; the extrusion block 64 is installed on the outer side wall of the sealing ring 65; one end of the elastic rod 63 is rotatably connected to the inner side wall of the cavity 51, and the other end is hinged with the extrusion block 64; The sliding rod 61 is fixed on the end of the elastic rod 63 away from the pressing block 64; the sliding block 62 is slidably connected inside the sliding rod 61; the hinge rod 33 is hinged with the sliding block 62; During the ascending process, the straight rod 32 pushes the hinge rod 33 to squeeze the sliding block 62, the sliding block 62 slides, and the sliding rod 61 drives the elastic rod 63 to rotate in the cavity 51, so that the extrusion block 64 hinged with the elastic rod 63 receives The pressure from the elastic rod 63 causes the pressing block 64 to squeeze the sealing ring 65, so that the sealing ring 65 is close to the side wall of the electric push rod 31, thereby preventing the liquid contained in the cryobox 5 from leaking, so that the electric push rod 31 has a good sealing effect during operation, so that the components on the inner side wall of the bottom end of the housing 1 can be waterproof.

As an embodiment of the present invention, the inner side wall of the bottom end of the sample grid 2 is provided with a sample groove 21; the fixing mechanism 4 includes a transmission assembly 41, a rectangular block 42, a first chute 43 and a fixing rod 44; the The transmission assembly 41 is installed inside the sample grid 2; the rectangular block 42 is fixedly connected to the interior of the sample grid 2, the inner side wall of which is slidably connected with a sliding plate 45, and a push assembly 46 is provided inside; the first chute 43 is provided in the On the inner side wall of the sample tank 21; the fixing rod 44 is slidably connected inside the first chute 43; during operation, when the electric push rod 31 moves, it drives the transmission assembly 41 to move, so that the sliding plate 45 slides inside the rectangular block 42 , the side wall of the slide plate 45 is connected with the push assembly 46 through a string, and the push assembly 46 is driven to move, so that the fixed rod 44 slidably connected inside the first chute 43 slides out, thereby squeezing the side wall of the sample piece to ensure that the sample is in the Stabilize during lifting to avoid sample slippage during lifting.

As an embodiment of the present invention, the transmission assembly 41 includes a second chute 411, a first air bag 412 and a pressing plate 413; the second chute 411 is arranged inside the side wall of the sample grid 2; the first An air bag 412 is fixed on the side wall of the second chute 411 and communicates with the interior of the rectangular block 42; the pressing plate 413 is slidably connected to the inside of the second chute 411, and its side wall is connected to the inner side of the cryobox 5 through an elastic cord. Wall connection; when working, when the electric push rod 31 moves, the elastic rope connected to the side wall of the pressing plate 413 is tightened, thereby pulling the pressing plate 413 to slide in the second chute 411, and the pressing plate 413 slides in the second chute 411. During the sliding process of the plate 413, the pressing plate 413 squeezes the first air bag 412, so that the gas in the first air bag 412 pushes the slide plate 45 to slide, and then drives the push assembly 46 to work, so that the ejector rod in the first chute 43 461 fixes the sample, so that the sample will not slide during the rising process, so as to ensure the order of the sample inside the sample grid 2 .

As an embodiment of the present invention, the push assembly 46 includes a top rod 461, a trapezoidal block 462 and a second air bag 463; the top rod 461 is slidably connected inside the rectangular block 42 through a spring; the trapezoidal block 462 is slidably connected On the inner side wall of the rectangular block 42, and its top end is connected with the slide plate 45 through a string; the second air bag 463 is fixed on the inner side wall of the rectangular block 42 and communicates with the first chute 43; during operation, when the transmission assembly 41 When the sliding plate 45 is pushed to slide, the string connected to the side wall of the sliding plate 45 pulls the trapezoidal block 462 to slide up, and under the elastic force of the spring, the top rod 461 slides inside the rectangular block 42, and the top rod 461 squeezes the second block 461. The air bag 463 causes the gas in the second air bag 463 to be ejected from the first chute 43 to push the fixing rod 44 to slide, thereby fixing the sample.

As an embodiment of the present invention, a third chute 52 and a fourth chute 53 are provided inside the side wall of the low temperature box 5; A rectangular plate 55 is connected; the third air bag 54 is communicated with the inside of the fourth chute 53; the rectangular plate 55 is slidably connected to the inside of the third chute 52, and a limit rope 56 is fixed to its side wall; The other end of the position rope 56 is fixedly connected to the inner side wall of the cryobox 5; the fourth chute 53 is slidably connected with a T-shaped rod 57; during operation, when the sample grid 2 rises to a certain height, the sample grid 2 is squeezed to the limit rope 56, so that the limit rope 56 pulls the rectangular plate 55 in the third chute 52 to slide, so that the rectangular plate 55 squeezes the third airbag 54, and the gas in the third airbag 54 is ejected from the fourth chute 53, Thus, the T-shaped rod 57 is pushed to move, and the string at the top of the T-shaped rod 57 pulls the knife, so that the electric push rod 31 is powered off, thereby controlling the movement of the electric push rod 31 .

As an embodiment of the present invention, the electric push rod 31 is connected with a first line 311 and a second line 312; the end of the T-shaped rod 57 is connected with the knife through a string; during operation, when the sample grid needs to be adjusted 2. When ascending, close the knife, so that the electric push rod 31 is energized and moved, thereby pushing the sample grid 2 to ascend. When the sample grid 2 rises to a certain height, the electric push rod 31 is powered off by the action of the limit rope 56. , so as to realize the control of the electric push rod 31 , thereby making the lifting and lowering of the sample grid 2 more intelligent, and reducing the workload of manual operation.

As an embodiment of the present invention, the end of the fixing rod 44 is fixed with a rubber block 441; when the sample grid is in the rising process, the sample is fixed by the fixing mechanism 4 to avoid the sample sliding during the rising process. The rubber block 441 fixed at the end of the ejector rod 461 can reduce the wear between the ejector rod 461 and the sample, and the rubber has a certain anti-slip effect, so that the ejector rod 461 and the sample side wall will not slip. , so that the fixation effect is better.

Working principle: The product is treated at low temperature by adding absolute ethanol to the cryobox 5. When the sample grid 2 is not moving, the sample is placed in the sample groove 21, so that the sample will not slide freely in the sample grid 2. , so as to avoid confusion of the samples placed in the sample grid 2. When the sample grid 2 moves up and down, start the electric push rod 31, and realize the lifting and lowering of the sample grid 2 by the pushing force of the electric push rod 31. When lifting and lowering, squeeze The elastic rope connected to the side wall of the plate 413 is pulled tight, thereby pulling the pressing plate 413 to slide in the second chute 411. During the sliding process of the pressing plate 413, the pressing plate 413 squeezes the first air bag 412, The gas in the first air bag 412 is ejected from the inside of the rectangular block 42, thereby pushing the sliding plate 45 to slide, and the side wall of the sliding plate 45 is connected with the push assembly 46 through a string, so that the string connected on the side wall of the sliding plate 45 pulls the trapezoidal block 462 To slide up, when the trapezoidal block 462 slides up, under the elastic force of the spring, the top rod 461 slides inside the rectangular block 42, so that the top rod 461 is pressed and fixed on the inner side wall of the rectangular block 42. air bag 463, so that the gas in the second air bag 463 is ejected from the first chute 43, thereby pushing the fixing rod 44 to slide, and then fixing the sample. When the top rod 461 is fixing the sample, its end is fixed The attached rubber block 441 can reduce the wear between the ejector rod 461 and the sample, and the rubber has a certain anti-slip effect, so that the ejector rod 461 and the side wall of the sample will not slip, so that the fixing effect is better; and the electrical During the rising process of the push rod 31, the straight rod 32 is driven to rise, so that the hinge rod 33 squeezes the sliding block 62, so that the sliding block 62 slides inside the sliding rod 61. During the sliding process of the sliding block 62, the sliding rod 61 The elastic rod 63 is driven to rotate in the cavity 51, so that the pressing block 64 hinged with the elastic rod 63 is subjected to the pressure from the elastic rod 63, so as to squeeze the pressing block 64, so that the pressing block 64 squeezes the seal ring 65, so that the sealing ring 65 is close to the side wall of the electric push rod 31, so as to prevent the liquid contained in the cryobox 5 from leaking, so that the electric push rod 31 has a good sealing effect during operation, so as to prevent the casing 1. The elements on the inner sidewall of the bottom end play a waterproof role; when the sample grid 2 rises to a certain height, the sample grid 2 squeezes the limit rope 56, so that the limit rope 56 pulls the rectangular plate 55 in the third chute 52 Sliding, so that the rectangular plate 55 squeezes the third air bag 54, and the gas in the third air bag 54 is ejected from the fourth chute 53, thereby pushing the T-shaped rod 57 to move. During the movement of the T-shaped rod 57, T The string at the top of the shaped rod 57 pulls the knife, so that the electric push rod 31 is powered off, and then the movement of the electric push rod 31 is controlled, so that the lifting and lowering of the sample grid 2 is more intelligent, and the workload of manual operation is reduced.

The above-mentioned front, back, left, right, top and bottom are all based on Figure 1 in the accompanying drawings of the description, and according to the observation angle of the person as a standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, And so on.

In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. The utility model provides a take full-automatic low temperature appearance of fixing device which characterized in that: comprises a shell (1), a sample grid (2), a lifting mechanism (3) and a fixing mechanism (4); a low-temperature box (5) is fixedly connected to the inner side wall of the top end of the shell (1); a sealing mechanism (6) is arranged in the low-temperature box (5); the sample grid (2) is fixedly connected to the top end of the lifting mechanism (3); the fixing mechanism (4) is arranged in the sample grid (2); the lifting mechanism (3) is arranged in the shell (1) and comprises an electric push rod (31), a straight rod (32) and a hinge rod (33); the sample grid (2) is fixedly connected to the top end of the electric push rod (31); the electric push rod (31) is fixedly connected to the inner side wall of the bottom end of the shell (1); the straight rod (32) is fixedly connected to the outer side wall of the electric push rod (31); one end of the hinged rod (33) is hinged with the straight rod (32), and the other end of the hinged rod is hinged with the sealing mechanism (6).

2. The full-automatic low-temperature instrument with the fixing device according to claim 1, characterized in that: the sealing mechanism (6) comprises a sliding rod (61), a sliding block (62), an elastic rod (63), an extrusion block (64) and a sealing ring (65); a cavity (51) is arranged in the low-temperature box (5); the sealing ring (65) is fixedly connected to the inner side wall of the cavity (51); the extrusion block (64) is arranged on the outer side wall of the sealing ring (65); one end of the elastic rod (63) is rotatably connected to the inner side wall of the cavity (51), and the other end of the elastic rod is hinged with the extrusion block (64); the sliding rod (61) is fixedly connected to one end, far away from the extrusion block (64), of the elastic rod (63); the sliding block (62) is connected inside the sliding rod (61) in a sliding manner; the hinge rod (33) is hinged with the sliding block (62).

3. The full-automatic low-temperature instrument with the fixing device according to claim 2, characterized in that: a sample groove (21) is formed in the inner side wall of the bottom end of the sample grid (2); the fixing mechanism (4) comprises a transmission assembly (41), a rectangular block (42), a first sliding groove (43) and a fixing rod (44); the transmission assembly (41) is arranged inside the sample grid (2); the rectangular block (42) is fixedly connected inside the sample grid (2), the inner side wall of the rectangular block is connected with a sliding plate (45) in a sliding manner, and a pushing assembly (46) is arranged inside the rectangular block; the first sliding chute (43) is arranged on the inner side wall of the sample groove (21); the fixed rod (44) is connected inside the first sliding groove (43) in a sliding mode.

4. The full-automatic low-temperature instrument with the fixing device according to claim 3, characterized in that: the transmission assembly (41) comprises a second sliding chute (411), a first air bag (412) and a squeezing plate (413); the second sliding chute (411) is arranged inside the side wall of the sample grid (2); the first air bag (412) is fixedly connected to the side wall of the second sliding groove (411) and communicated with the inside of the rectangular block (42); the extrusion plate (413) is connected inside the second sliding groove (411) in a sliding mode, and the side wall of the extrusion plate is connected with the inner side wall of the low-temperature box (5) through an elastic rope.

5. The full-automatic low-temperature instrument with the fixing device according to claim 4, characterized in that: the push assembly (46) comprises a push rod (461), a trapezoidal block (462) and a second air bag (463); the ejector rod (461) is connected inside the rectangular block (42) in a sliding manner through a spring; the trapezoidal block (462) is connected to the inner side wall of the rectangular block (42) in a sliding manner, and the top end of the trapezoidal block is connected with the sliding plate (45) through a thin rope; the second air bag (463) is fixedly connected to the inner side wall of the rectangular block (42) and is communicated with the inside of the first sliding groove (43).

6. The full-automatic low-temperature instrument with the fixing device according to claim 5, characterized in that: a third sliding chute (52) and a fourth sliding chute (53) are arranged in the side wall of the low-temperature box (5); a third air bag (54) is fixedly connected to the inner side wall of the third sliding groove (52), and a rectangular plate (55) is connected in a sliding manner; the third air bag (54) is communicated with the interior of the fourth chute (53); the rectangular plate (55) is connected inside the third sliding chute (52) in a sliding manner, and a limiting rope (56) is fixedly connected to the side wall of the rectangular plate; the other end of the limiting rope (56) is fixedly connected with the inner side wall of the low-temperature box (5); and a T-shaped rod (57) is connected in the fourth sliding chute (53) in a sliding manner.

7. The full-automatic low-temperature instrument with the fixing device according to claim 6, characterized in that: the electric push rod (31) is connected with a first line (311) and a second line (312); the end part of the T-shaped rod (57) is connected with the knife switch through a string.

Images