CN220924719U - PCR board film sealing device - Google Patents

Abstract

The utility model provides a PCR plate film sealing device, which relates to the technical field of film sealing equipment and adopts the main technical scheme that: comprises a frame, a lifting mechanism, a film sealing mechanism and a tray. A lifting mechanism is arranged on one side wall of the frame, and a film sealing mechanism is arranged at the lower end of the lifting mechanism. The purpose that the lifting mechanism drives the film sealing mechanism to lift so as to replace the gear drive in the prior art to lift and further improve the film sealing efficiency is achieved. Meanwhile, a tray positioned below the film sealing mechanism is arranged on one side wall of the frame, and the tray is used for sequentially placing the PCR plate and the film sealing along the direction from bottom to top. The sealing film is pressed on the PCR plate by the sealing film mechanism, so that the aim of sealing the PCR plate is fulfilled.

Description

PCR board film sealing device

Technical Field

The utility model relates to the technical field of film sealing equipment, in particular to a PCR plate film sealing device.

Background

Polymerase Chain Reaction (PCR) is a molecular biological technique used to amplify specific DNA fragments. The standard PCR process is divided into three steps, DNA denaturation, annealing and extension, and a sealing plate membrane is used to cover the PCR plates (16, 24, 48, 96 wells, 384 wells, etc.) during the process to avoid volatilization of the template and cross contamination during the reaction.

In the prior art, the PCR plate sealing film is sealed by full-automatic sealing film equipment to the open-state PCR plate, however, in the prior art, the lifting module of the full-automatic PCR plate sealing film equipment is driven by a gear to lift, so that the speed is low and the working efficiency is low.

Disclosure of utility model

The utility model aims to provide a PCR plate film sealing device, wherein a lifting mechanism is arranged on a frame, and a film sealing mechanism is arranged at the lower end of the lifting mechanism. The lifting mechanism is utilized to drive the film sealing mechanism to lift, so that the gear drive in the prior art is replaced to lift, and the purpose of improving the film sealing efficiency is achieved.

The utility model is realized by the following technical scheme:

The PCR plate film sealing device comprises a frame, a lifting mechanism, a film sealing mechanism and a tray, wherein the lifting mechanism is arranged on one side wall of the frame; the film sealing mechanism is arranged at the lower end of the lifting mechanism; the tray is arranged on one side wall of the frame; the tray is positioned below the film sealing mechanism; the tray is used for sequentially placing the PCR plate and the sealing film along the direction from bottom to top; the lifting mechanism is used for enabling the film sealing mechanism to be close to or far away from the tray; and when the film sealing mechanism is in a state of being close to the tray, the film sealing mechanism is used for pressing the film sealing on the tray on the PCR plate.

Optionally, the lifting mechanism comprises a first driving motor and a first crank connecting rod; the first driving motor is arranged on one side wall of the frame; the output shaft of the first driving motor is connected with the first crank connecting rod; the lower end of the first crank connecting rod is connected with the film sealing mechanism; the first driving motor is used for driving the first crank connecting rod to reciprocate so as to drive the film sealing mechanism to be close to or far away from the tray.

Optionally, the PCR plate film sealing device further comprises a fixing plate; the fixed plate is arranged on one side wall of the frame; the first driving motor is arranged on the fixed plate; the lifting mechanism further comprises a guide rod; the guide rod is arranged on the fixed plate in a penetrating way; the lower end of the guide rod is connected with the film sealing mechanism.

Optionally, the film sealing mechanism comprises a connecting plate, a first elastic piece, a blade and an ironing head; the connecting plate is connected to the lower end of the lifting mechanism; the first elastic piece is connected to the lower end of the connecting plate; the lower end of the first elastic piece is connected with the ironing head; the ironing head is used for pressing the sealing film on the PCR plate; the blade is connected to the lower end of the connecting plate, and is sleeved on the outer side of the ironing head; the lower end face of the ironing head is lower than the lower end face of the blade when the first elastic piece is in a natural state; the first elastic piece is in a compressed state, and the lower end face of the ironing head is higher than the lower end face of the blade.

Optionally, the first elastic member includes a spring and a guide post; the upper end of the spring is connected with the connecting plate; the lower end of the spring is connected with the ironing head; the upper part of the guide post is arranged on the connecting plate in a penetrating way; the lower part of the guide post is penetrated in the spring; the lower end of the guide post is connected with the ironing head.

Optionally, the film sealing mechanism further comprises a second elastic piece and a film sealing fixing frame; the second elastic piece is connected to the lower end of the connecting plate; the lower end of the second elastic piece is connected with the sealing film fixing frame; the sealing film fixing frame is sleeved outside the blade; the sealing film fixing frame is used for pressing the sealing film on the tray; the second elastic piece is in a natural state, and the lower end face of the sealing film fixing frame is not higher than the lower end face of the blade.

Optionally, the PCR plate film sealing device further comprises a fixing box for placing the PCR plate; the fixed box is arranged on the tray; the fixing box is used for corresponding to the sealing film fixing frame, so that the sealing film fixing frame presses the sealing film on the upper end face of the fixing box.

Optionally, the PCR plate film sealing device further includes a second driving motor and a second crank connecting rod; the second driving motor is arranged on the frame; the second driving motor is positioned below the tray; the output shaft of the second driving motor is connected with the second crank connecting rod; one end of the second crank connecting rod, which is far away from the second driving motor, is hinged with the tray; the second drive is used for driving the second crank connecting rod to reciprocate so as to drive the tray to approach or depart from the rack.

Optionally, the PCR plate film sealing device further comprises a guide plate; the guide plate is arranged on one side wall of the frame; the guide plate is provided with a guide groove; the guide groove extends along the direction away from the frame; the two guide plates are oppositely arranged at two sides of a side wall surface of one side wall of the frame; the two sides of the tray are respectively inserted into the guide grooves on the two guide plates.

Optionally, the PCR plate film sealing device further comprises a film sealing transfer mechanism; the film sealing transmission mechanism comprises a film sealing fixing rod, a third driving motor, a film sealing scroll and a film sealing guide rod; the sealing film fixing rod is arranged at the upper end of one side wall of the rack and is used for placing a sealing film to be used; the film sealing guide rod is arranged on one side wall of the frame; the film sealing guide rods are arranged outside the lifting mechanism and the film sealing mechanism and used for guiding the film sealing so that the middle part of the film sealing is positioned between the film sealing mechanism and the tray; the third driving motor is arranged at the upper end of one side wall of the frame; the output shaft of the third driving motor is connected with the film sealing scroll; the film sealing scroll is arranged in parallel with the film sealing fixing rod; the sealing film reel is used for being connected with one end of the sealing film far away from the sealing film fixing rod; the third driving motor is used for driving the film sealing scroll to rotate so as to roll the film sealing.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

① A lifting mechanism is arranged on one side wall of the frame, and a film sealing mechanism is arranged at the lower end of the lifting mechanism. The purpose that the lifting mechanism drives the film sealing mechanism to lift so as to replace the gear drive in the prior art to lift and further improve the film sealing efficiency is achieved.

② A tray positioned below the film sealing mechanism is arranged on one side wall of the frame, and the tray is used for sequentially placing the PCR plate and the film sealing along the direction from bottom to top. The sealing film is pressed on the PCR plate by the sealing film mechanism, so that the aim of sealing the PCR plate is fulfilled.

Drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:

FIG. 1 is a schematic diagram of a PCR plate film sealing apparatus according to an embodiment;

FIG. 2 is a schematic diagram showing a front view of a PCR plate film sealing apparatus according to an embodiment;

FIG. 3 is a schematic view of the structure of FIG. 2 taken along line A-A;

FIG. 4 is a schematic diagram of a membrane sealing mechanism for a PCR plate membrane sealing device according to an embodiment;

FIG. 5 is a schematic diagram showing a front view of a membrane sealing mechanism for a PCR plate membrane sealing device according to an embodiment;

FIG. 6 is a schematic view of the structure of FIG. 5 at B-B;

FIG. 7 is a schematic view of a PCR plate sealing apparatus with a protective cover according to an embodiment.

In the drawings, the reference numerals and corresponding part names:

1-a frame;

2-a lifting mechanism; 21-a first drive motor; 22-a first crank connecting rod; 23-a guide bar;

3-film sealing mechanism; 31-connecting plates; 32-a first elastic member; 321-a spring; 322-guide posts; 33-blade; 34-scalding the head; 35-a second elastic member; 36-sealing a film fixing frame;

4-a tray; 5-a fixing plate; 6-fixing the box; 7-a second drive motor; 8-a second crank connecting rod; 9-a guide plate; 10-a guide groove; 11-sealing a film fixing rod; 12-a third drive motor; 13-a film sealing reel; 14-sealing film guide rods; 15-a protective cover.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

Examples:

A PCR plate film sealing device, as shown in figures 1-6, comprises a frame 1, a lifting mechanism 2, a film sealing mechanism 3 and a tray 4.

The axial direction of the frame 1 is the vertical direction.

The lifting mechanism 2 may be selected from a structure having a telescopic function such as an electric telescopic rod, a pneumatic telescopic rod, or an air cylinder. The lifting mechanism 2 is arranged on one side wall of the frame 1 in a screwed and fixed mode.

The film sealing mechanism 3 is fixedly connected with the lower end of the lifting mechanism 2 in a threaded manner, so that the film sealing mechanism 3 can lift relative to the frame 1 under the driving of the lifting mechanism 2. So as to achieve the purpose of replacing the gear drive in the prior art to lift and further improve the film sealing efficiency.

The tray 4 is disposed on a side wall of the frame 1, and the tray 4 is located below the film sealing mechanism 3. The tray 4 is used for sequentially placing the PCR plate and the sealing film along the direction from bottom to top. That is, a certain gap is formed between the upper end face of the tray 4 and the lower end face of the film sealing mechanism 3, and the height of the gap is not smaller than the sum of the thickness of the PCR plate and the thickness of the film sealing mechanism 3, so that the film sealing mechanism can be placed between the upper end face of the PCR plate and the lower end face of the film sealing mechanism 3 after the PCR plate is placed on the tray 4.

In the specific implementation process, after the PCR plate to be sealed is placed on the tray 4, the sealing film is placed above the PCR plate. The lifting mechanism 2 is used for driving the film sealing mechanism 3 to be downwards close to the tray 4 until the film sealing mechanism 3 presses the film sealing on the PCR plate. After the PCR plate is sealed, the lifting mechanism 2 drives the sealing mechanism 3 to be upwards away from the tray 4 so as to facilitate the removal of the sealed PCR plate and the sealing of the next PCR plate.

In order to improve the stability of the lifting mechanism 2 in the process of driving the film sealing mechanism 3 to lift. As shown in fig. 1, in the present embodiment, the lifting mechanism 2 includes a first drive motor 21 and a first crank link 22. The first driving motor 21 is screwed and fixed on one side wall of the frame 1, a first crank connecting rod 22 is connected to an output shaft of the first driving motor 21, and the lower end of the first crank connecting rod 22 is screwed and connected with the film sealing mechanism 3.

In the specific implementation process, the crank of the first crank connecting rod 22 is connected to the output shaft of the first driving motor 21, the connecting rod of the first crank connecting rod 22 is rotatably connected to one end of the crank far away from the first driving motor 21, and the lower end of the connecting rod is in threaded connection with the film sealing mechanism 3. With this structure, when the first drive motor 21 is operated, the first drive motor 21 drives the crank of the first crank link 22 to rotate, and then drives the link of the first crank link 22 to rise/fall in the vertical direction, so that the film sealing mechanism 3 is away from/near the tray 4. So as to achieve the purposes of driving the film sealing mechanism 3 to be far away from or close to the tray 4 by using the first driving motor 21 and the first crank connecting rod 22, and improving transmission precision and transmission stability.

In order to reduce the risk of the film sealing mechanism 3 shifting and tilting during the lifting process of the film sealing mechanism 3 driven by the first crank connecting rod 22. As shown in fig. 1, in this embodiment, the PCR plate film sealing apparatus further includes a fixing plate 5. A fixing plate 5 is disposed on a side wall of the frame 1 by screwing, welding or integrally forming, and the first driving motor 21 is screwed and fixed on an upper plate surface of the fixing plate 5. The purpose of supporting the first driving motor 21 by the fixing plate 5 to improve the stability of the first driving motor 21 in the operation process is achieved. The lifting mechanism 2 further includes a guide rod 23, wherein the guide rod 23 is disposed in parallel with the connecting rod of the first crank connecting rod 22, and the guide rod 23 and the connecting rod of the first crank connecting rod 22 are both disposed on the fixing plate 5 in a penetrating manner. The upper end surface of the film sealing mechanism 3 is connected with the lower end of the guide rod 23 in a screwed and welded fixing mode.

In the specific implementation process, in the process that the first driving motor 21 drives the film sealing mechanism 3 to lift through the first crank connecting rod 22, the guide rod 23 guides and limits the movement direction of the film sealing mechanism 3. So as to achieve the purpose of reducing the risk of the film sealing mechanism 3 shifting and tilting in the horizontal direction.

In order to improve the quality of the PCR plate sealing film. In this embodiment, as shown in fig. 4 to 6, the film sealing mechanism 3 includes a connection plate 31, a first elastic member 32, a blade 33, and an ironing head 34. The connection plate 31 is connected to the lower end of the lifting mechanism 2 by screwing, welding, or the like. The first elastic member 32 is screwed and fixed at the lower end of the connecting plate 31, and the lower end of the first elastic member 32 is welded and fixed with the ironing head 34. The blade 33 is in a closed loop structure, the blade 33 is sleeved outside the ironing head 34, and the upper end of the blade 33 is fixedly connected with the lower end face of the connecting plate 31 in a threaded or welded mode. In addition, when the first elastic member 32 is in a natural state, the lower end surface of the ironing head 34 is lower than the lower end surface of the blade 33; in the compressed state of the first elastic member 32, the lower end surface of the ironing head 34 is higher than the lower end surface of the blade 33.

In the specific implementation process, in the process that the lifting mechanism 2 drives the connecting plate 31 to move downwards, when the ironing head 34 does not press the sealing film on the PCR plate, the first elastic piece 32 is in a natural state, the lower section of the ironing head 34 is lower than the lower end of the blade 33, and as the connecting plate 31 moves downwards, the ironing head 34 presses the sealing film on the PCR plate first and presses the sealing film on the PCR plate. After the PCR plate seals the film, the lifting mechanism 2 continues to drive the connecting plate 31 to move downward, at this time, the first elastic member 32 is gradually compressed, so that the lower end surface of the ironing head 34 is higher than the lower end surface of the blade 33, and the blade 33 completes cutting the edge of the sealing film sealed on the PCR plate. With this structure, on the one hand, in the natural state of the first elastic member 32, the lower end surface of the ironing head 34 is lower than the lower end surface of the blade 33, and the purpose of improving the film sealing effect can be achieved. On the other hand, when the first elastic member 32 is in a compressed state, the lower end surface of the ironing head 34 is higher than the lower end surface of the blade 33, so that the purpose of improving the cutting effect of the blade 33 on the sealing film can be achieved, and the risk that the blade 33 cannot cut the sealing film is reduced.

In order to reduce the risk of tilting of the first elastic member 32 during the expansion and contraction of the first elastic member 32. In this embodiment, as shown in fig. 6, the first elastic member 32 includes a spring 321 and a guide post 322. The upper end of the spring 321 is welded and fixed on the lower end surface of the connecting plate 31, and the lower end of the spring 321 is welded and fixed on the upper end surface of the ironing head 34. A guide post 322 is arranged in the spring 321 in a penetrating way, the upper part of the guide post 322 is arranged in the connecting plate 31 in a penetrating way, and the lower end of the guide post 322 is welded and fixed or screwed on the upper end face of the ironing head 34.

In the implementation process, when the spring 321 of the first elastic member 32 is stretched/compressed, the guide post 322 moves upward/downward relative to the connecting plate 31 and abuts against the inner side of the spring 321, so as to achieve the purpose of reducing the inclination and deformation risks of the spring 321. Meanwhile, the guiding column 322 limits the lifting direction of the ironing head 34, so as to reduce the probability of tilting risk of the ironing head 34 in the horizontal plane, and further achieve the purpose of improving the film sealing effect of the ironing head 34.

To facilitate cutting of the sealing film by the blade 33. As shown in fig. 4 and fig. 6, in the present embodiment, the film sealing mechanism 3 further includes a second elastic member 35 and a film sealing fixing frame 36. The specific structure of the second elastic member 35 is the same as that of the first elastic member, and thus will not be described again. The second elastic member 35 is welded and fixed on the lower end surface of the connecting plate 31, the lower end of the second elastic member 35 is welded and fixed with the sealing film fixing frame 36, the sealing film fixing frame 36 is sleeved outside the blade 33, and when the second elastic member 35 is in a natural state, the lower end surface of the sealing film fixing frame 36 is not higher than the lower end surface of the blade 33.

In the specific implementation process, in the process that the lifting mechanism 2 drives the connecting plate 31 to move downwards, when the film sealing fixing frame 36 is not contacted with the tray 4, the second elastic piece 35 is in a natural state. Along with the lifting mechanism 2 continuing to drive the connecting plate 31 to move downwards, the lower end face of the sealing film fixing frame 36 is attached to the upper end face of the tray 4, and the edge of the sealing film is propped against the tray 4. At this time, the lifting mechanism 2 continues to drive the connecting plate 31 to move downwards, so that the blade 33 is attached to the sealing film and cuts the sealing film. By this structure, the sealing film is fixed on the tray 4 by the sealing film fixing frame 36, and the purpose of reducing the sliding risk of the sealing film when the blade 33 cuts the sealing film and further improving the sealing film cutting effect of the blade 33 is achieved.

The sealing film is pressed against the tray 4 for the sealing film fixing frame 36 to be convenient. As shown in fig. 1, in the present embodiment, the PCR plate film sealing apparatus further includes a fixing case 6 for placing the PCR plate. The fixing box 6 is welded or screwed on the tray 4, and the fixing box 6 is located right below the sealing film fixing frame 36.

In the specific implementation, the PCR plate is fixed in the fixed box 6, and a gap for the blade 33 to pass through is formed between the outer side of the side wall of the PCR plate and the inner side of the side wall of the fixed box 6. When the lifting mechanism 2 drives the connecting plate 31 to move downwards, the sealing film fixing frame 36 presses the sealing film against the fixing box 6, and at the moment, the blade 33 penetrates through a gap between the PCR plate and the fixing box 6 to complete sealing film cutting. By this structure, the purpose of facilitating the film sealing fixing frame 36 to press the film sealing against the fixing case 6 so that the blade 33 cuts the film sealing is achieved.

In order to facilitate the removal of the PCR plate after the sealing film and the placement of the PCR plate to be sealed. In this embodiment, as shown in fig. 1 to 3, the PCR plate film sealing apparatus further includes a second driving motor 7 and a second crank link 8. The second driving motor 7 is screwed and fixed on the frame 1, and the second driving motor 7 is located below the tray 4. The output shaft of the second driving motor 7 is connected with a second crank connecting rod 8, and one end of the second crank connecting rod 8 far away from the second driving motor 7 is hinged with the tray 4.

In the specific implementation process, the crank of the second crank connecting rod 8 is connected to the output shaft of the second driving motor 7, the connecting rod of the second crank connecting rod 8 is rotatably connected to one end of the crank far away from the second driving motor 7, and one end of the connecting rod far away from the crank is hinged with the tray 4. With this structure, when the second driving motor 7 is operated, the second driving motor 7 drives the crank of the second crank link 8 to rotate, and then drives the link of the second crank link 8 to approach/depart from the bracket, so that the tray 4 approaches/departs from the bracket. So as to achieve the aim of facilitating the removal of the PCR plate after the sealing film and the placement of the PCR plate to be sealed when the tray 4 is far away from the bracket. Meanwhile, the purpose of conveniently transferring the PCR to be sealed to the lower part of the film sealing mechanism 3 for film sealing is achieved.

In order to limit the direction of movement of the tray 4. In this embodiment, as shown in fig. 1, the PCR plate film sealing apparatus further includes a guide plate 9. A guide plate 9 is welded or screwed on one side wall of the frame 1, and a guide groove 10 extending along the direction far away from the frame 1 is formed in the guide plate 9. The number of the guide plates 9 is two, the two guide plates 9 are oppositely arranged on two sides of one side wall surface of the frame 1, and two sides of the tray 4 are respectively inserted into the guide grooves 10 on the two guide plates 9. By this structure, the purpose of limiting the movement direction of the tray 4 by the guide groove 10 on the guide plate 9 is achieved.

In order to achieve the purpose of automatically transferring sealing films by the PCR plate sealing film device. In this embodiment, as shown in fig. 1 to 3, the PCR plate film sealing apparatus further includes a film sealing transfer mechanism including a film sealing fixing lever 11, a third driving motor 12, a film sealing reel 13, and a film sealing guide lever 14. The sealing film fixing rod 11 is arranged at the upper end of one side wall of the frame 1, and a rolling sealing film to be used is arranged on the sealing film fixing rod 11 in a penetrating mode. The sealing film guide rods 14 are arranged on one side wall of the frame 1, a plurality of sealing film guide rods 14 are arranged on the number of the sealing film guide rods 14, the sealing film guide rods 14 are arranged on the outer sides of the lifting mechanism 2 and the sealing film mechanism 3 and used for guiding the transfer direction of sealing films, and the middle part of the sealing films is located between the sealing film mechanism 3 and the tray 4. The third driving motor 12 is fixedly connected to the upper end of one side wall of the frame 1 in a threaded manner, and an output shaft of the third driving motor 12 is connected with a film sealing scroll 13 through a coupler. The sealing film reel 13 is arranged in parallel with the sealing film fixing rod 11, and the sealing film reel 13 is used for being connected with one end of the sealing film far away from the sealing film fixing rod 11.

In the specific implementation process, after the PCR plate seals the film, the third driving motor 12 operates to drive the film sealing reel 13 to rotate so as to wind the used portion of the sealing film, and further remove the used sealing film between the lifting mechanism 2 and the film sealing mechanism 3. Meanwhile, the sealing film to be used is driven to be transferred to the sealing film reel 13, so that the sealing film to be used is transferred between the lifting mechanism 2 and the sealing film mechanism 3. By the structure, the purpose of automatically transferring the sealing film is achieved.

In order to improve the safety of the PCR plate film sealing device in use, in a specific implementation process, as shown in fig. 7, a protective cover 15 with an opening at the lower end may be further disposed on a side wall of the frame 1, only the lifting mechanism 2 and the film sealing mechanism 3 are disposed in the protective cover 15, and the film sealing guide rod 14 is disposed around the protective cover 15. Through the structure, the purpose of improving the safety of the PCR plate film sealing device in the use process is achieved.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. A PCR plate film sealing apparatus, comprising:

A frame (1);

the lifting mechanism (2) is arranged on one side wall of the frame (1);

the film sealing mechanism (3) is arranged at the lower end of the lifting mechanism (2);

a tray (4), wherein the tray (4) is arranged on one side wall of the frame (1); the tray (4) is positioned below the film sealing mechanism (3); the tray (4) is used for sequentially placing the PCR plate and the sealing film along the direction from bottom to top;

The lifting mechanism (2) is used for enabling the film sealing mechanism (3) to be close to or far away from the tray (4); and when the film sealing mechanism (3) is in a state of being close to the tray (4), the film sealing mechanism (3) is used for pressing the film sealing on the tray (4) on the PCR plate.

2. The PCR plate film sealing apparatus as claimed in claim 1, wherein:

The lifting mechanism (2) comprises a first driving motor (21) and a first crank connecting rod (22);

The first driving motor (21) is arranged on one side wall of the frame (1);

The output shaft of the first driving motor (21) is connected with the first crank connecting rod (22);

The lower end of the first crank connecting rod (22) is connected with the film sealing mechanism (3);

The first driving motor (21) is used for driving the first crank connecting rod (22) to reciprocate so as to drive the film sealing mechanism (3) to be close to or far away from the tray (4).

3. The PCR plate film sealing apparatus as claimed in claim 2, wherein:

the PCR plate film sealing device also comprises a fixed plate (5);

The fixed plate (5) is arranged on one side wall of the frame (1);

The first driving motor (21) is arranged on the fixed plate (5);

the lifting mechanism (2) further comprises a guide rod (23);

the guide rod (23) is arranged on the fixed plate (5) in a penetrating way;

The lower end of the guide rod (23) is connected with the film sealing mechanism (3).

4. The PCR plate film sealing apparatus as claimed in claim 1, wherein:

The film sealing mechanism (3) comprises a connecting plate (31), a first elastic piece (32), a blade (33) and an ironing head (34);

the connecting plate (31) is connected to the lower end of the lifting mechanism (2);

The first elastic piece (32) is connected to the lower end of the connecting plate (31);

the lower end of the first elastic piece (32) is connected with the ironing head (34);

the ironing head (34) is used for pressing the sealing film on the PCR plate;

The blade (33) is connected to the lower end of the connecting plate (31), and the blade (33) is sleeved on the outer side of the ironing head (34);

The first elastic piece (32) is in a natural state, and the lower end surface of the ironing head (34) is lower than the lower end surface of the blade (33);

The first elastic piece (32) is in a compressed state, and the lower end face of the ironing head (34) is higher than the lower end face of the blade (33).

5. The PCR plate film sealing apparatus as claimed in claim 4, wherein:

The first elastic member (32) comprises a spring (321) and a guide post (322);

the upper end of the spring (321) is connected with the connecting plate (31);

The lower end of the spring (321) is connected with the ironing head (34);

the upper part of the guide post (322) is arranged on the connecting plate (31) in a penetrating way;

the lower part of the guide post (322) is penetrated in the spring (321);

The lower end of the guide post (322) is connected with the ironing head (34).

6. The PCR plate film sealing apparatus as claimed in claim 4, wherein:

The film sealing mechanism (3) further comprises a second elastic piece (35) and a film sealing fixing frame (36);

the second elastic piece (35) is connected to the lower end of the connecting plate (31);

the lower end of the second elastic piece (35) is connected with the sealing film fixing frame (36);

the sealing film fixing frame (36) is sleeved outside the blade (33);

the sealing film fixing frame (36) is used for pressing the sealing film on the tray (4);

The second elastic piece (35) is in a natural state, and the lower end face of the sealing film fixing frame (36) is not higher than the lower end face of the blade (33).

7. The PCR plate film sealing apparatus as claimed in claim 6, wherein:

Also comprises a fixing box (6) for placing the PCR plate;

The fixed box (6) is arranged on the tray (4);

The fixing box (6) is used for corresponding to the sealing film fixing frame (36), so that the sealing film fixing frame (36) presses the sealing film on the upper end face of the fixing box (6).

8. The PCR plate film sealing apparatus as claimed in claim 1, wherein:

The device also comprises a second driving motor (7) and a second crank connecting rod (8);

the second driving motor (7) is arranged on the frame (1);

the second driving motor (7) is positioned below the tray (4);

The output shaft of the second driving motor (7) is connected with the second crank connecting rod (8);

one end of the second crank connecting rod (8) far away from the second driving motor (7) is hinged with the tray (4);

The second drive is used for driving the second crank connecting rod (8) to reciprocate so as to drive the tray (4) to be close to or far away from the rack (1).

9. The PCR plate film sealing apparatus as claimed in claim 8, wherein:

Also comprises a guide plate (9);

the guide plate (9) is arranged on one side wall of the frame (1);

A guide groove (10) is formed in the guide plate (9);

the guide groove (10) extends in a direction away from the frame (1);

The two guide plates (9) are oppositely arranged at two sides of a side wall surface of one side wall of the frame (1);

the two sides of the tray (4) are respectively inserted into the guide grooves (10) on the two guide plates (9).

10. The PCR plate film sealing apparatus as claimed in claim 1, wherein:

the device also comprises a sealing film transfer mechanism;

The sealing film transfer mechanism comprises a sealing film fixing rod (11), a third driving motor (12), a sealing film scroll (13) and a sealing film guide rod (14);

The sealing film fixing rod (11) is arranged at the upper end of one side wall of the frame (1) and is used for placing a sealing film to be used;

The film sealing guide rod (14) is arranged on one side wall of the frame (1);

The film sealing guide rods (14) are arranged outside the lifting mechanism (2) and the film sealing mechanism (3) and used for guiding the film sealing so that the middle part of the film sealing is positioned between the film sealing mechanism (3) and the tray (4);

The third driving motor (12) is arranged at the upper end of one side wall of the frame (1);

An output shaft of the third driving motor (12) is connected with the film sealing scroll (13);

the film sealing scroll (13) and the film sealing fixing rod (11) are arranged in parallel;

the sealing film reel (13) is used for being connected with one end of the sealing film far away from the sealing film fixing rod (11);

the third driving motor (12) is used for driving the film sealing scroll (13) to rotate so as to roll the film sealing.