Sample cover tightening device

Abstract

The present invention provides a sample cover loosening and tightening device, which includes: a support frame, a bottle body clamping component, two pressing components, and a loosening and tightening drive mechanism; wherein the bottle body clamping component is arranged on the support frame; the two pressing components are relatively arranged above the bottle body clamping component, and the opposite sides of each pressing component are provided with a pressing wheel, and the two pressing components are connected to the pressing drive mechanism; the loosening and tightening drive mechanism is transmission-connected to the two pressing wheels. The present invention clamps the sample bottle body through the bottle body clamping component; drives the two pressing components to move toward or away from each other through the pressing drive mechanism, and clamps the sample cover through the two pressing wheels; drives the two pressing wheels to rotate through the loosening and tightening drive mechanism, so as to drive the sample cover clamped by the two pressing wheels to rotate, thereby screwing the sample cover to achieve the loosening and tightening of the sample cover.

Description

Technical Field

[0001] The invention relates to the technical field of solvent detection bottles, in particular to a sample cover tightening device. Background Art

[0002] The process of tightening and loosening the bottle caps of solvent test bottles requires a lot of manpower. Moreover, some solvents are not suitable for direct contact, which results in the need for manual labor to wear gloves or take other protective measures before tightening and loosening the bottle caps, making the tightening and loosening of the bottle caps cumbersome and inefficient. Summary of the Invention

[0003] In view of this, the present invention proposes a sample cap tightening device, which aims to solve the problem that the existing tightening and loosening of bottle caps is cumbersome and requires a lot of manpower.

[0004] The present invention proposes a sample cover loosening and tightening device, which includes: a support frame, a bottle body clamping component, two pressing components, and a loosening and tightening driving mechanism; wherein, the bottle body clamping component is arranged on the support frame to clamp the sample bottle; the two pressing components are relatively arranged above the bottle body clamping component, and the opposite sides of each pressing component are provided with a pressing wheel, and the two pressing components are connected to the pressing driving mechanism, and the pressing driving mechanism is used to drive the two pressing components to move toward or away from each other, so that the two pressing components move toward each other to clamp the sample cover through the two pressing wheels; the loosening and tightening driving mechanism is transmission-connected to the two pressing wheels, so as to drive the two pressing wheels to rotate, so as to drive the sample cover clamped by the two pressing wheels to rotate, thereby realizing the loosening and tightening of the sample cover.

[0005] Furthermore, in the above-mentioned sample cover tightening device, the clamping component also includes: a support block and a movable block; wherein, the clamping wheel is rotatably connected to the movable block, the movable block and the support block are slidably connected, and an elastic member is provided between the movable block and the support block to buffer the force applied by the support block to the movable block, so as to buffer the extrusion force applied by the clamping wheel to the sample cover.

[0006] Furthermore, in the above-mentioned sample cover tightening device, both ends of the support block are provided with guide blocks, and each of the guide blocks is provided with a sliding groove for guiding the movable block.

[0007] Furthermore, in the above-mentioned sample cover tightening device, a limiting plate is provided on the sliding groove to limit the movable block and prevent the movable block from separating from the supporting block.

[0008] Furthermore, in the above-mentioned sample cover tightening device, sliding plates are provided at both ends of one side of the movable block, and the sliding plates are respectively clamped in the corresponding sliding grooves to slide along the length direction of the sliding grooves; a pressure wheel fixing plate is provided on the other side of the movable block for installing the pressure wheel.

[0009] Furthermore, the above-mentioned sample cover loosening and tightening device, the loosening and tightening drive mechanism includes: a first driving motor, a power wheel, a driving wheel and a supporting wheel; wherein, the driving wheel and the supporting wheel are respectively arranged on both sides of the two pressing components, and the driving wheel and the supporting wheel are connected by a closed loop belt, and the closed loop belt is arranged between the two pressing wheels, and the closed loop belt is used to be arranged on the outer periphery of the sample cover to press the sample cover under the action of the two pressing wheels and abut against the outer walls of the two pressing wheels; the power wheel is transmission-connected to the driving wheel, and the first driving motor is connected to the power wheel to drive the power wheel to rotate, and the power wheel is used to drive the driving wheel to rotate, so as to drive the closed loop belt to rotate and screw the sample cover.

[0010] Furthermore, in the above-mentioned sample cover tightening device, a belt is sleeved on the outer wall of the power wheel, and the belt is in contact with the driving wheel, so that when the belt rotates with the power wheel, the driving wheel is driven to rotate through friction.

[0011] Furthermore, in the above-mentioned sample cover tightening device, the closed loop is an elastic loop, which is used to elastically expand and contract as the two pressing wheels move toward or away from each other.

[0012] Furthermore, the clamping drive mechanism of the above-mentioned sample cover tightening device includes two clamping drive components, which are used to drive the two clamping components to move respectively; each of the clamping drive components includes: a connected second drive motor and a transmission component, and the transmission component is used to convert the circular motion output by the second drive motor into the linear motion of the clamping component.

[0013] Furthermore, the above-mentioned sample cover tightening device also includes: a pressure sensor and a controller; wherein, the pressure sensor is used to detect the clamping force applied by the clamping component to the sample cover; the controller is electrically connected to the pressure sensor to receive the clamping force detected by the pressure sensor, and controls the clamping drive mechanism according to the clamping force to control the movement of the clamping component.

[0014] The sample cap tightening device provided by the present invention uses a bottle body clamping component to clamp the sample bottle body to prevent the sample bottle body from rotating with it when loosening or tightening the sample cap; a clamping drive mechanism drives two clamping components to move toward or away from each other, so that the two clamping components move toward each other to the two sides of the sample cap to clamp the sample cap through two clamping wheels; the tightening drive mechanism drives the two clamping wheels to rotate, so as to drive the sample cap clamped by the two clamping wheels to rotate, that is, through the friction between the two clamping wheels and the sample cap, the rotation of the two clamping wheels drives the sample cap to rotate, that is, the sample cap is screwed, thereby achieving the tightening of the sample cap. The sample cap tightening device can realize the loosening and tightening of bottle caps of different diameters, which not only improves the efficiency of sample cap tightening and reduces the workload and manpower required for tightening, but also reduces manual contact with reagent bottles, thereby reducing the impact of chemical products on people and the chemicals themselves, while also ensuring the consistency of each reagent bottle, and can be better combined with other structures to achieve automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0016] Figure 1 A schematic structural diagram of a sample cover tightening device provided in an embodiment of the present invention;

[0017] Figure 2 A top view of a sample cover tightening device provided by an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of a support frame provided by an embodiment of the present invention;

[0019] Figure 4 A schematic structural diagram of a pressing component provided in an embodiment of the present invention;

[0020] Figure 5 A top view of a pressing component provided in an embodiment of the present invention;

[0021] Figure 6 A schematic structural diagram of a support block provided in an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of the structure of an activity block provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] See also Figures 1 to 3 , which shows the preferred structure of the sample cover tightening device provided by the embodiment of the present invention. As shown in the figure, the sample cover tightening device includes: a support frame 1, a bottle body clamping component (not shown in the figure), two pressing components 2, and a tightening drive mechanism 3; wherein,

[0025] The bottle body clamping component is provided on the support frame 1 to clamp the sample bottle body to prevent the sample bottle body from rotating with it when the sample cover is loosened or tightened. Specifically, the support frame 1 is provided with a bottle body clamping groove 11 to clamp the sample bottle body, and the support frame 1 is provided with a bottle body clamping component at the bottle body clamping groove 11 to clamp the sample bottle body. The support frame 1 plays a supporting role and can support components such as the bottle body clamping component and the pressing component 2, and can also clamp the sample bottle body through the bottle body clamping groove 11; the bottle body clamping component can clamp the sample bottle body clamped in the bottle body clamping groove 11 to prevent the sample bottle body from rotating. Among them, the bottle body clamping component can be a three-claw clamping mechanism or other clamping mechanisms, which is not limited in this embodiment. In order to facilitate the detection of whether a sample bottle is placed in the bottle body clamping slot 11, preferably, a bottle body detector (not shown in the figure) is provided in the bottle body clamping slot 11 to detect whether the sample bottle is inserted into the bottle body clamping slot 11; further preferably, the bottle body detector can also be electrically connected to a controller, and the controller is used to receive the installation status detected by the bottle body detector and control the bottle body clamping component according to the installation status to control the bottle body clamping component to clamp the sample bottle after the sample bottle is inserted into the bottle body clamping slot 11.

[0026] The two pressing parts 2 are arranged oppositely above the bottle clamping part, and a pressing wheel 21 is provided on the opposite side of each pressing part 2. In addition, the two pressing parts 2 are connected to a pressing drive mechanism (not shown in the figure), which is used to drive the two pressing parts 2 to move toward or away from each other, so that the two pressing parts 2 move toward each other to the two sides of the sample cover to clamp the sample cover through the two pressing wheels 21. Specifically, the two pressing parts 2 can be arranged oppositely and located on both sides of the bottle clamping groove 11 (such as Figure 2The two pressing parts 2 are both adjustably connected to the support frame 1, so that the two pressing parts 2 move toward or away from each other along the width direction of the support frame 1, thereby driving the two pressing wheels 21 to move toward or away from each other, so that the two pressing wheels 21 move toward each other to the two sides of the sample cover (as shown in FIG. Figure 2 The upper and lower sides shown in the figure are just above the bottle body clamping groove 11 and clamping the sample cover to achieve clamping of the sample cover; they can also move back and forth to achieve loosening of the sample cover.

[0027] The tensioning drive mechanism 3 is in transmission connection with both the pinching wheels 21, and is used to drive the two pinching wheels 21 to rotate, thereby driving the sample cover clamped by the two pinching wheels 21 to rotate. Specifically, the tensioning drive mechanism 3 can be disposed on the support frame 1 to achieve the fixing of the tensioning drive mechanism 3.

[0028] Continue to see Figures 1 to 2 The tension driving mechanism 3 includes: a first driving motor (not shown in the figure), a power wheel 31, a driving wheel 32 and a support wheel 33; wherein the driving wheel 32 and the support wheel 33 are respectively arranged on both sides of the two pressing components 2 (such as Figure 2The left and right sides shown in the figure) are connected between the driving wheel 32 and the supporting wheel 33 by a closed loop belt 35, which is arranged between the two pressing wheels 21. The closed loop belt 35 is arranged on the periphery of the sample cover to press the sample cover under the action of the two pressing wheels 21 and abut against the outer walls of the two pressing wheels 21; the power wheel 31 is transmission-connected to the driving wheel 32, and the first drive motor is connected to the power wheel 31 to drive the power wheel 31 to rotate. The power wheel 31 is used to drive the driving wheel 32 to rotate, so as to drive the closed loop belt 35 to rotate, and then drive the two pressing wheels 21 and the supporting wheel 33 to rotate, thereby driving the sample cover to rotate, and screwing the sample cover to achieve the tightness of the sample cover. Specifically, the closed loop belt 35 can be an elastic loop belt so as to elastically expand and contract with the movement of the two pressure wheels 21. For example, the closed loop belt 35 can be a rubber loop belt. When the sample cover is in a clamped state, the closed loop belt 35 is sequentially wound around the driving wheel 32, the two pressure wheels 21 and the supporting wheel 33 to form a loop. When the sample cover is in a non-clamped state, the closed loop belt 35 may or may not be in contact with the two pressure wheels 21. This is not limited in the present embodiment. To avoid misalignment between the pressure wheels 21 and the closed loop belt 35, preferably, the pressure wheels 21 and the closed loop belt 35 are always in contact, that is, the pressure wheels 21 move toward each other or the displacement of the movement toward each other is small. Among them, the power wheel 31 and the driving wheel 32 can be connected by a meshing transmission, or a belt 34 can be set on the outer wall of the power wheel 31, and the belt 34 is in contact with the driving wheel 32, so that the belt 34 drives the driving wheel 32 to rotate through friction when the power wheel 31 rotates; of course, other transmission methods can be used between the power wheel 31 and the driving wheel 32, and no limitation is made to them in this embodiment. Among them, a pressure sensor can also be provided on the inner wall of the closed loop 35 or on the clamping component 2 to detect the clamping force applied to the sample cover. Preferably, the controller is electrically connected to the pressure sensor to receive the clamping force detected by the pressure sensor, and when the clamping force is greater than a threshold, the controller controls the clamping drive mechanism to stop driving to control the two clamping components 2 to stop moving toward each other, and can also control the tension drive mechanism 3 to drive the clamping wheel 21 to rotate.

[0029] Continue to see Figure 3 The support frame 1 includes: a base 12, two clamping support plates 13, and two driving support plates 14; wherein the two clamping support plates 13 are arranged on a set of opposite sides of the base 12 to respectively support the two clamping components 2; the two driving support plates 14 are arranged on another set of opposite sides of the base 12 to support the tensioning drive mechanism 3. Specifically, the base 12 can be a rectangular structure, and the bottle body clamping groove 11 can be arranged in the middle position of the base 12 so that the sample card is set in the middle position of the base 12, so that the two clamping support blocks 13 are symmetrically arranged on both sides of the bottle body clamping groove 11 (such as Figure 1As shown in the upper and lower sides), the two driving support plates 14 are also symmetrically arranged on both sides of the bottle body clamping groove 11 (as shown in the upper and lower sides). Figure 1 On the left and right sides shown), two driving support plates 14 are used to support the driving wheel 32 and the support wheel 33 respectively, and two clamping plates 141 can be arranged side by side on the top of the driving support plate 14 to be arranged on the upper and lower sides of the driving wheel 32 or the support wheel 33, and the clamping plates 141 are provided with mounting holes to install the rotating shafts of the driving wheel 32 or the support wheel 33 so that the driving wheel 32 or the support wheel 33 can be rotatably connected to the two clamping plates 141; a driving wheel support plate 142 is also provided on the driving support plate 14 arranged on the right side to support the driving wheel 31. In order to improve the stability of the two clamping support plates 13 and the two driving support plates 14, preferably, a reinforcing plate 15 is provided between the two clamping support plates 13 and the two driving support plates 14 and the base 12 to strengthen the two clamping support plates 13 and the two driving support plates 14.

[0030] See also Figures 4 and 5 , which shows the preferred structure of the clamping component of the present invention. As shown in the figure, the clamping component 2 includes: a support block 22, a movable block 23 and a clamping wheel 21; wherein the clamping wheel 21 is rotatably connected to the movable block 23, and the movable block 23 and the support block 22 are slidably connected. In addition, an elastic member is provided between the movable block 23 and the support block 22 to buffer the force applied to the movable block 23 by the support block 22. Specifically, the clamping wheel 21 is rotatably connected to the movable block 23 via a rotating shaft, and can move with the movable block 23 to achieve clamping of the sample cover. It can also use the friction force of the rotation of the clamping wheel 21 to drive the clamped sample cover to rotate, thereby achieving the screwing of the sample cover. The support block 22 may be provided with a sliding groove 221, and the movable block 23 may be partially slidably engaged within the sliding groove 221. An elastic member may be disposed within the sliding groove 221, and the ends of the elastic member may be respectively connected to the groove wall of the sliding groove 221 and the end of the movable block 23 positioned within the sliding groove 221. This allows the support block 22 to move toward the movable block 23 under the drive of the clamping drive mechanism, i.e., the two support blocks 22 move toward each other, compressing the elastic member so that the elastic member applies a force to the movable block 23, causing the movable block 23 and the pressure wheel 21 to move toward the sample. This movement, i.e., the two pressure wheels 21 move toward each other, thereby clamping the sample cover through the two pressure wheels 21. A guide shaft (not shown) may be connected to the clamping support plate 13, and the support block 22 and the movable block 23 are both sleeved on the guide shaft to guide the movement of the support block 22 and the movable block 23. The elastic member may be a spring, which may be sleeved on the guide shaft to cushion the force applied by the movable block 23 to the sample bottle, thereby preventing the sample bottle from being squeezed and deformed. The pressure sensor provided on the closed loop 35 may also be provided on a side of the elastic member close to the support block 22 , and the clamping force borne by the sample cover may be detected by the pressure between the elastic member and the support block 22 .

[0031] See also Figure 6 , which is a schematic structural diagram of the support block provided by an embodiment of the present invention. As shown in the figure, guide blocks 222 are provided at both the left and right ends of the support block 22, and each guide block 222 is provided with a sliding groove 221 to guide the movable block 23; in order to limit the movement of the movable block 23, preferably, a limiting plate 223 is provided on the sliding groove 221 to limit the extreme position of the movable block 23 moving toward each other and prevent the movable block 23 from sliding out of the sliding wipe 221, that is, to prevent the movable block 23 from separating from the support block 22. Among them, the support block 22 is further provided with a mounting hole 224 on the guide block 222, which penetrates the support block 22 so that the guide shaft is passed through the mounting hole 224 to guide the support block 22.

[0032] See also Figure 7 , which is a schematic diagram of the structure of the movable block provided by the embodiment of the present invention. As shown in the figure, the two ends of one side of the movable block 23 (such as Figure 7 A sliding plate 231 is provided at each of the left and right ends (as shown in the figure), and the sliding plates 231 are respectively clamped in the corresponding sliding grooves 221 to slide along the length direction of the sliding grooves 221; a pressure wheel fixing plate 232 can be provided in the middle position of the other side of the movable block 23, and there can be two of them for mounting the pressure wheel 21 so that the pressure wheel 21 is rotatably connected between the two pressure wheel fixing plates 232 through the shaft.

[0033] In one embodiment of the present invention, the clamping drive mechanism includes: two clamping drive members, respectively connected to the two clamping parts 2, respectively driven to move the two clamping parts 2, so that the two clamping parts 2 move toward each other or away from each other; each clamping drive member includes: a second drive motor and a transmission member, the transmission member is connected to the second drive motor to convert the circular motion output by the second drive motor into the linear motion of the clamping part 1, so that the two clamping parts 2 move toward each other or away from each other. Among them, the transmission member includes: a ball screw and a ball nut; wherein the ball nut is screwed to the ball screw; specifically, the ball screw is connected to the second drive motor, and the second drive motor drives the ball screw to rotate; the ball nut is connected to the support block 22 of the clamping part 2 to drive the support block 22 to reciprocate linearly, so that the two support blocks 22 move toward each other or away from each other.

[0034] In another embodiment of the present invention, the clamping drive mechanism includes: a second drive motor, a ball screw, and two ball nuts; wherein the two ball nuts are threadedly connected to the ball screw, and the threads of the two ball nuts are arranged in opposite directions, which are used to drive the ball nuts to move toward or away from each other, thereby driving the two support blocks 22 connected to the two ball nuts to move toward or away from each other. The two ball nuts have one forward thread and the other reverse thread. When the ball screw is driven by the second drive motor to rotate, the two ball nuts move toward or away from each other, thereby causing the two support blocks 22 to move toward or away from each other, thereby achieving the clamping or loosening of the sample cover.

[0035] In this embodiment, the bottle detector can detect the sample bottle using light. The bottle detector may include an infrared emitter and an infrared receiver, each disposed on opposite side walls of the bottle retaining slot 11. The infrared emitter is configured to emit infrared light, while the infrared receiver is configured to receive the infrared light emitted by the infrared emitter and transmit the detection result of the sample bottle to a controller. The sample bottle is clamped by the bottle clamping mechanism, and the infrared emitter emits infrared light. If the sample bottle is properly installed, i.e., inserted between the infrared emitter and the infrared receiver, the infrared light is blocked, preventing the infrared receiver from receiving the infrared light. The infrared receiver then transmits a signal indicating that the sample bottle is properly inserted to the controller. Conversely, if the sample bottle is not inserted between the infrared emitter and the infrared receiver, the infrared light emitted by the infrared emitter is transmitted to the infrared receiver without being blocked by the sample bottle. Upon receiving the infrared light, the infrared receiver transmits a signal indicating that the sample bottle is not properly inserted to the controller. Upon receiving the signal indicating that the sample bottle is properly inserted, the controller controls the bottle clamping component to clamp the sample bottle.

[0036] The working process of the sample cover loosening and tightening device is as follows: first, the sample bottle is placed in the bottle body clamping groove 11 manually or by a robot and the sample bottle body of the sample bottle is clamped by a three-claw clamping structure; then, the second drive motor provides power to drive the two support blocks 22 to move toward the middle sample cover to squeeze the sample cover (the squeezing force is monitored and fed back by the pressure sensor). After the clamping force detected by the pressure sensor reaches the threshold, the first drive motor drives the power wheel 31 to rotate and transmits the force to the sample cover through the closed loop belt 35 to twist the sample cover open. The sample cover is then separated from the sample bottle body through other actions; the first motor is reversed to tighten the sample cover.

[0037] In summary, the sample cap tightening device provided in this embodiment uses a bottle body clamping component to clamp the sample bottle body to prevent the sample bottle body from rotating with it when loosening or tightening the sample cap; the two clamping components 2 are driven to move toward or away from each other by a clamping drive mechanism, so that the two clamping components 2 move toward each other to the two sides of the sample cap to clamp the sample cap through two clamping wheels 21; the two clamping wheels 21 are driven to rotate by a tightening drive mechanism 3 to drive the sample cap clamped by the two clamping wheels 21 to rotate, that is, through the friction between the two clamping wheels 21 and the sample cap, the sample cap is driven to rotate through the rotation of the two clamping wheels, that is, the sample cap is screwed, thereby achieving the tightening of the sample cap. The sample cap tightening device can realize the loosening and tightening of bottle caps of different diameters, which not only improves the efficiency of sample cap tightening and reduces the workload and manpower required for tightening, but also reduces manual contact with reagent bottles, thereby reducing the impact of chemical products on people and the chemicals themselves, while also ensuring the consistency of each reagent bottle, and can be better combined with other structures to achieve automation.

[0038] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0039] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A sample cover tightening device, characterized in that: include: A support frame (1), a bottle body clamping component, two pressing components (2), and a tensioning drive mechanism (3); wherein, The bottle body clamping component is arranged on the support frame (1) and is used to clamp the sample bottle body; The two pressing parts (2) are arranged oppositely above the bottle body clamping part, and a pressing wheel (21) is provided on the opposite side of each pressing part (2), and the two pressing parts (2) are connected to a pressing drive mechanism, and the pressing drive mechanism is used to drive the two pressing parts (2) to move toward each other or away from each other, so that the two pressing parts (2) move toward each other to clamp the sample cover through the two pressing wheels (21); The loosening and tightening driving mechanism (3) is in transmission connection with the two pressing wheels (21) to drive the two pressing wheels (21) to rotate, thereby driving the sample cover clamped by the two pressing wheels (21) to rotate, thereby achieving loosening and tightening of the sample cover; The sample cover tightening device further includes: a pressure sensor and a controller; wherein, The pressure sensor is used to detect the clamping force applied by the pressing component (2) to the sample cover; The controller is electrically connected to the pressure sensor, and is used to receive the clamping force detected by the pressure sensor, and control the clamping drive mechanism according to the clamping force to control the movement of the clamping component (2); The pressing component (2) further comprises: a supporting block (22) and a movable block (23); wherein, The pressing wheel (21) is rotatably connected to the movable block (23), and the movable block (23) and the support block (22) are slidably connected, and an elastic member is provided between the movable block (23) and the support block (22) for buffering the force applied by the support block (22) to the movable block (23) to buffer the extrusion force applied by the pressing wheel (21) to the sample cover; Both ends of the support block (22) are provided with guide blocks (222), and each guide block (222) is provided with a sliding groove (221) for guiding the movable block (23); The tensioning drive mechanism (3) comprises: a first driving motor, a power wheel (31), a driving wheel (32) and a supporting wheel (33); wherein, The driving wheel (32) and the supporting wheel (33) are respectively arranged on both sides of the two pressing components (2), and the driving wheel (32) and the supporting wheel (33) are connected by a closed loop belt (35). The closed loop belt (35) is arranged between the two pressing wheels (21), and the closed loop belt (35) is an elastic loop belt, which is used to elastically expand and contract with the two pressing wheels (21) moving toward or away from each other; The power wheel (31) is connected to the driving wheel (32) in a transmission manner, and the first drive motor is connected to the power wheel (31) to drive the power wheel (31) to rotate. The power wheel (31) is used to drive the driving wheel (32) to rotate, thereby driving the closed loop belt (35) to rotate and screw the sample cover; When the sample cover is in a clamped state, the closed loop is sequentially wound around the driving wheel, the two pressing wheels and the supporting wheel to form a loop; The pressure sensor is arranged on the inner wall of the closed loop or on the pressing component; The support frame is provided with a bottle body clamping groove, and the bottle body clamping groove is provided with a bottle body detector for detecting whether the sample bottle body is inserted into the bottle body clamping groove; the bottle body detector is electrically connected to a controller, and the controller is used to receive the installation status detected by the bottle body detector and control the bottle body clamping component according to the installation status to control the bottle body clamping component to clamp the sample bottle body after the sample bottle body is inserted into the bottle body clamping groove.

2. The sample cover tightening device according to claim 1, characterized in that: A belt (34) is sleeved on the outer wall of the power wheel (31), and the belt (34) is in contact with the driving wheel (32), so that when the belt (34) rotates with the power wheel (31), the driving wheel (32) is driven to rotate by friction.

3. The sample cover tightening device according to claim 1, characterized in that: The clamping drive mechanism comprises two clamping drive members for respectively driving the two clamping components (2) to move; Each of the clamping drive components comprises: a second drive motor and a transmission component connected to each other, wherein the transmission component is used to convert the circular motion output by the second drive motor into the linear motion of the clamping component (2).

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