Auxiliary sealing device

Abstract

The invention discloses a sealing auxiliary device, and belongs to the technical field of pipe fitting sealing, the sealing auxiliary device comprises a placing seat, a sealing assembly and a driving mechanism, the placing seat is provided with a placing groove, so that an operator can more conveniently and rapidly place a centrifuge tube to an accurate position, the sealing assembly comprises a mounting plate and a limiting piece, the mounting plate is provided with a mounting hole, and the limiting piece is arranged on the mounting hole. The limiting piece and the sealing head are located on the two sides of the mounting plate, mounting and positioning of the sealing piece are facilitated, and when the driving mechanism drives the centrifugal tube to move towards the sealing piece and make contact with the sealing piece, due to the fact that the sealing assembly further comprises the elastic piece which is located between the sealing head and the mounting plate, self-adaptive adjustment can be achieved according to the contact condition; the sealing rubber ring can be evenly stressed and tightly attached to the centrifugal tube, uneven pressure is avoided, sealing reliability is improved, when the centrifugal tube and the sealing piece interact, the elastic piece can effectively buffer impact force generated when the centrifugal tube and the sealing piece make contact with each other, and damage to the centrifugal tube due to rigid collision is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pipe sealing, and in particular to a sealing auxiliary device. Background Art

[0002] Centrifuge tubes are a common laboratory tool with various specifications, ranging from a few milliliters to tens of milliliters of larger capacity. They are widely used in experimental operations such as separation, purification and detection in multiple disciplines such as biology, medicine, and chemistry. Since it is necessary to prevent sample loss, ensure experimental accuracy and maintain sample stability during the experiment, centrifuge tubes are usually sealed.

[0003] In view of the above problems, the prior art designs a sealing auxiliary device, which adopts a screw-nut pair mechanism to drive the seal clamping tooling and the seal to move vertically, and drives the gear pair to rotate by the screw so that the seal clamping tooling and the seal rotate simultaneously during the vertical lifting process, thereby realizing automatic docking and spiral assembly between the seal and the centrifuge tube.

[0004] However, the existing sealing auxiliary device has a complex mechanical structure, cumbersome and time-consuming operation, and the spiral assembly method is prone to uneven sealing pressure distribution when tightening the seal, resulting in different degrees of fit between the seal and the centrifuge tube, affecting the overall sealing effect and causing sample leakage. In addition, this spiral assembly method also has high requirements on the structural strength of the centrifuge tube. If its structural strength is insufficient, it may break due to uneven external force. Summary of the invention

[0005] The object of the present invention is to provide a sealing auxiliary device which is not only simple in structure and easy to operate, but also can improve the sealing performance of a centrifuge tube and protect the sealed tube from damage.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] The sealing auxiliary device is used to clamp and seal the sealing member at the opening of the centrifuge tube. The sealing member includes a connecting rod, a sealing head and a sealing rubber ring connected in sequence. The sealing auxiliary device includes:

[0008] A placement seat, wherein the placement seat is provided with a placement slot, and the placement slot is configured to carry the centrifuge tube;

[0009] A sealing assembly, comprising a mounting plate, an elastic member and a stopper, wherein the mounting plate is provided with a mounting hole, the connecting rod is passed through the mounting hole, the elastic member is located between the sealing head and the mounting plate, the stopper and the sealing head are located on both sides of the mounting plate, the stopper is detachably connected to the connecting rod, and under the drive of the elastic member, the stopper is stopped against the mounting plate;

[0010] A driving mechanism is provided, wherein the driving mechanism can drive the placement seat and the sealing assembly to approach each other, so that the sealing rubber ring is clamped at the opening of the centrifuge tube.

[0011] Furthermore, the mounting plate is provided with an annular groove, and the elastic member is sleeved on the connecting rod and partially extends into the annular groove.

[0012] Furthermore, the sealing assembly also includes a guide member, which is connected to the mounting plate. The sealing head is provided with a guide channel which penetrates along the thickness direction, and the guide member is inserted into the guide channel.

[0013] Furthermore, the mounting plate is provided with a positioning groove, and the sealing assembly also includes a positioning nut, which is screwed to the mounting plate and one end of which extends into the positioning groove, and one end of the guide member extends into the positioning groove and is screwed to the positioning nut.

[0014] Furthermore, the driving mechanism includes a support seat, a motor, a screw and a nut block, the motor is installed on the support seat, the screw is connected to the output end of the motor, the nut block is threaded on the screw and slidably connected to the support seat, and the placement seat is connected to the nut block.

[0015] Furthermore, the driving mechanism also includes a baffle, which is connected to the support seat, the baffle is provided with a strip hole, the placement seat is provided with a connecting portion, the connecting portion is passed through the strip hole and connected to the nut block, and the connecting portion can move along the length direction of the strip hole.

[0016] Furthermore, the support seat is provided with a photoelectric sensor, and the placement seat is provided with a sensor baffle matching the photoelectric sensor.

[0017] Furthermore, the placement seat is provided with a notch, the notch is communicated with the placement groove, and the notch passes through to one end of the placement seat facing the mounting plate.

[0018] Furthermore, the placement seat is provided with an opening, the opening is connected to the placement groove, one end of the opening is connected to the notch, and the other end passes through to an end of the placement seat away from the mounting plate, and the width of the opening is smaller than the width of the notch.

[0019] Furthermore, a plurality of the placement seats are provided, and the plurality of the placement seats are all connected to the output end of the driving mechanism, and the mounting plate is provided with a plurality of the mounting holes, and the plurality of the mounting holes correspond one to one to the plurality of the placement seats.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a sealing auxiliary device, which allows an operator to place a centrifuge tube in an accurate position more conveniently and quickly by providing a placement groove on a placement seat, thereby ensuring that the centrifuge tube will not move or shake at will during the sealing operation; by providing a mounting plate and a limiter, a mounting hole is provided on the mounting plate, and the limiter and the sealing head are located on both sides of the mounting plate, which not only facilitates the installation of the seal but also ensures that the seal cannot fall out of the mounting hole; by providing an elastic member and allowing the elastic member to be located between the sealing head and the mounting plate, when a driving mechanism drives the centrifuge tube to move toward the sealing assembly and contact the sealing rubber ring, the elastic member can be adaptively adjusted according to the contact condition, the sealing rubber ring can be evenly stressed and tightly fit the centrifuge tube to avoid uneven pressure, thereby improving the reliability and stability of the seal, and effectively preventing the leakage of liquid or gas, and when the centrifuge tube interacts with the sealing member, the elastic member can also effectively buffer the impact force generated when the two contact, thereby avoiding damage to the seal and the centrifuge tube due to rigid collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a first structural schematic diagram of a sealing auxiliary device provided in a specific embodiment of the present invention;

[0023] Figure 2 is a structural schematic diagram of a sealing assembly provided in a specific embodiment of the present invention;

[0024] Figure 3 is a second structural schematic diagram of a sealing auxiliary device provided in a specific embodiment of the present invention;

[0025] Figure 4 It is a third structural schematic diagram of the sealing auxiliary device provided in a specific embodiment of the present invention.

[0026] In the figure:

[0027] 1. Placement seat; 11. Notch; 12. Opening;

[0028] 2. Sealing assembly; 21. Mounting plate; 211. Mounting hole; 22. Elastic member; 23. Limiting member; 24. Guide member; 25. Positioning nut;

[0029] 3. Driving mechanism; 30. Support seat; 301. Support plate; 302. Motor mounting plate; 303. Bearing mounting plate; 31. Motor; 32. Screw; 33. Nut block; 34. Baffle; 340. Strip hole;

[0030] 100. Centrifuge tube;

[0031] 200, sealing element; 201, connecting rod; 202, sealing head; 203, sealing rubber ring;

[0032] 300. Photoelectric sensor. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figure 1-Figure 4As shown, the present invention provides a sealing auxiliary device, which is used to clamp and seal a sealing member 200 at the opening of a centrifuge tube 100. The sealing member 200 includes a connecting rod 201, a sealing head 202 and a sealing rubber ring 203 connected in sequence. The sealing auxiliary device includes a placement seat 1, a sealing assembly 2 and a driving mechanism 3. The placement seat 1 is provided with a placement groove, and the placement groove is configured to carry the centrifuge tube 100; the sealing assembly 2 includes a mounting plate 21, an elastic member 22 and a stopper 23, and the mounting plate 21 is provided with a There is a mounting hole 211, a connecting rod 201 is passed through the mounting hole 211, an elastic member 22 is located between the sealing head 202 and the mounting plate 21, a limiting member 23 and the sealing head 202 are located on both sides of the mounting plate 21, and the limiting member 23 is detachably connected to the connecting rod 201. Driven by the elastic member 22, the limiting member 23 is stopped against the mounting plate 21; the driving mechanism 3 can drive the placement seat 1 and the sealing assembly 2 to approach each other, so that the sealing rubber ring 203 is clamped at the opening of the centrifuge tube 100.

[0039] By providing a placement groove on the placement seat 1, the operator can place the centrifuge tube 100 in an accurate position more conveniently and quickly, ensuring that the centrifuge tube 100 will not move or shake at will during the sealing operation; by providing a mounting plate 21 and a stopper 23, a mounting hole 211 is provided on the mounting plate 21, and the stopper 23 and the sealing head are located on both sides of the mounting plate 21, which not only facilitates the installation of the sealing member, but also ensures that the sealing member cannot fall out of the mounting hole 211; by providing an elastic member 22, and allowing the elastic member 22 to be located between the sealing head and the mounting plate 21 When the driving mechanism 3 drives the centrifuge tube 100 to move toward the sealing assembly 2 and contact the sealing rubber ring 203, the elastic member 22 can be adaptively adjusted according to the contact condition, and the sealing rubber ring 203 can be evenly stressed and fit tightly to the centrifuge tube 100, thereby avoiding uneven pressure, improving the reliability and stability of the seal, and effectively preventing the leakage of liquid or gas. Moreover, when the centrifuge tube 100 interacts with the seal, the elastic member 22 can also effectively buffer the impact force generated when the two are in contact, thereby avoiding damage to the seal 200 and the centrifuge tube 100 due to rigid collision.

[0040] In this embodiment, the limiting member 23 is a shaft clamping ring, and a clamping ring groove is provided on the connecting rod 201. The limiting member 23 can be clamped in the clamping ring groove, which is convenient for installation and disassembly and has a stable connection.

[0041] In this embodiment, the sleeve is assembled in the mounting hole 211 by interference fit, and the connecting rod 201 and the sleeve are matched with each other in a clearance, so that the seal 200 can slide in the sleeve. This matching method can ensure the coaxiality of the sleeve and the mounting hole 211, thereby avoiding problems such as eccentricity and jamming of the seal 200 during movement, which affects the sealing effect.

[0042] Specifically, Figure 2As shown, the mounting plate 21 is provided with an annular groove 212, and the elastic member 22 is sleeved on the connecting rod 201 and partially extends into the annular groove 212. The sleeve arrangement is not only simple to install, but also allows the elastic member 22 to form a tight fit with the connecting rod 201, fixes the elastic member 22 in a specific position, reduces its distortion during the operation of the device, and thus enhances the stability of the entire sealing assembly 2 structure. On this basis, the annular groove 212 also provides a precise installation position for the elastic member 22, controls the movement trajectory and position of the sealing head 202, so that the sealing rubber ring 203 can be accurately clamped at the opening of the centrifuge tube 100, and improves the accuracy of the seal; and the annular groove 212 can limit the excessive deformation and distortion of the elastic member 22, so that the elastic force applied by the elastic member 22 to the sealing head 202 is more uniform and stable, thereby ensuring that the sealing rubber ring 203 is tightly fitted with the opening of the centrifuge tube 100.

[0043] In this embodiment, the elastic member 22 is a spring.

[0044] In other embodiments, the elastic member 22 may also be a rubber buffer pad.

[0045] Specifically, Figure 2 As shown, the sealing assembly 2 further includes a guide member 24, which is connected to the mounting plate 21. The sealing head 202 is provided with a guide channel penetrating along the thickness direction, and the guide member 24 is inserted into the guide channel. The cooperation between the guide member 24 and the guide channel can accurately limit the movement direction of the sealing head 202, improve the accuracy of the sealing operation, and prevent the sealing head 202 from being offset or skewed during the movement, resulting in the sealing rubber ring 203 being unable to be accurately mounted at the opening of the centrifuge tube 100.

[0046] More specifically, the mounting plate 21 is provided with a positioning groove, and the sealing assembly 2 further includes a positioning nut 25, which is screwed to the mounting plate 21, and one end of which extends into the positioning groove, and one end of the guide member 24 extends into the positioning groove and is screwed to the positioning nut 25. The positioning groove provides a clear and precise installation position for the guide member 24, so that the guide member 24 can be accurately placed in a set space, ensuring that it can be accurately aligned with the guide channel on the sealing head 202; and the guide member 24 is installed by the cooperation of the positioning groove and the positioning nut 25, which is convenient for installation and disassembly. The operator only needs to put one end of the guide member 24 into the positioning groove and then screw in the positioning nut 25 to complete the installation, without the need for complex auxiliary tools or special installation skills, saving time and labor costs.

[0047] In this embodiment, the guide member 24 is a guide pin, which has a simple structure and low cost.

[0048] Specifically, Figure 1As shown, the driving mechanism 3 includes a support seat 30, a motor 31, a screw 32 and a nut block 33. The motor 31 is installed on the support seat 30, the screw 32 is connected to the output end of the motor 31, the nut block 33 is screwed to the screw 32 and slidably connected to the support seat 30, and the placement seat 1 is connected to the nut block 33. When the motor 31 is started, its output end begins to rotate, and the output torque is transmitted to the screw 32, driving the screw 32 to rotate. Since the nut block 33 is slidably connected to the support seat 30, the rotational movement of the screw 32 will be converted into a linear movement of the nut block 33 along the axis direction of the screw 32, so that the placement seat 1 can move with the nut block 33 and gradually approach the sealing assembly 2. The combination of the support seat 30, the motor 31, the screw 32 and the nut block 33 constitutes a relatively simple and compact drive system, the connection relationship between the components is clear, the overall structure occupies a small space, and the screw connection between the screw 32 and the nut block 33 has high mechanical efficiency and transmission accuracy, which can accurately move the placement seat 1 to a specified position.

[0049] More specifically, if Figure 1 and Figure 3 As shown, the driving mechanism 3 further includes a baffle 34, which is connected to the support seat 30, and is provided with a strip hole 340. The placement seat 1 is provided with a connecting portion, which is passed through the strip hole 340 and connected to the nut block 33, and the connecting portion can move along the length direction of the strip hole 340. The setting of the baffle 34 can shield the transmission module, making the entire device look more concise and neat from the outside, and the baffle 34 can isolate the transmission module to prevent the operator from contacting the dangerous moving parts due to misoperation or accident, thereby creating a relatively safe working environment for the operator; and the setting of the strip hole 340 provides a clear motion trajectory for the connecting portion, so that the placement seat 1 can move accurately along the length direction of the strip hole 340, and during the assembly process, the strip hole 340 provides an intuitive installation guide for the connecting portion, and the operator can easily pass the connecting portion through the strip hole 340 and connect it to the nut block 33, without the need for complex alignment operations, thereby reducing the difficulty of assembly and improving the assembly efficiency.

[0050] like Figure 3As shown, in this embodiment, the support seat 30 includes a support plate 301, a motor mounting plate 302 and a bearing mounting plate 303. One end of the support plate 301 is connected to the motor mounting plate 302, and the other end is connected to the bearing mounting plate 303. The motor 31 is connected to the motor mounting plate 302. The motor mounting plate 302 is provided with a connecting hole. The screw 32 is passed through the connecting hole and is rotatably connected to the bearing mounting plate 303. The nut block 33 slides on the connecting support plate, and the baffle 34 is connected to the motor mounting plate 302. Specifically, the bearing mounting plate 303 is provided with a bearing hole for installing a ball bearing. The screw 32 passes through the ball bearing and has an interference fit with the ball bearing to achieve a rotatable connection between the screw 32 and the bearing mounting plate 303. The support plate 301 is provided with a slide rail, and the nut block 33 is provided with a groove. The slide rail is embedded in the groove so that the nut block 33 can slide along the slide rail.

[0051] More specifically, if Figure 4 As shown, the support seat 30 is provided with a photoelectric sensor 300, and the placement seat 1 is provided with a sensor baffle matching the photoelectric sensor 300. The combination of the photoelectric sensor 300 and the sensor baffle can accurately detect the position of the placement seat 1. When the placement seat 1 moves, the sensor baffle moves accordingly. Once the baffle enters the sensing area of ​​the photoelectric sensor 300, the photoelectric sensor 300 will produce a corresponding signal change. In this way, the position of the placement seat 1 at a specific moment can be accurately known.

[0052] In this embodiment, photoelectric sensors 300 are respectively arranged at both ends of the support plate 301. The photoelectric sensor 300 near one end of the sealing component 2 corresponds to the position when the centrifuge tube 100 is sealed with the sealing member 200. By sensing the sensor baffle with the photoelectric sensor 300, it is possible to accurately determine whether the centrifuge tube 100 has reached the accurate position for sealing with the sealing member 200, so that the sealing member 200 is just clamped at the opening of the centrifuge tube 100, thereby ensuring the sealing effect and avoiding problems such as poor sealing and sample leakage caused by position deviation; the photoelectric sensor 300 far from one end of the sealing component 2 corresponds to the position of the placement seat 1 when the centrifuge tube 100 is placed. The photoelectric sensor 300 can accurately detect whether the placement seat 1 returns to the specified starting position, thereby ensuring the accuracy of the position of the placement seat 1, so that the centrifuge tube 100 can be placed in a fixed correct position every time. It should be noted that in this embodiment, the photoelectric sensor 300 and the sensor baffle are conventional electrical components in the art, and their circuit connection relationship and working method are conventional settings, which will not be repeated here.

[0053] Specifically, the placement seat 1 is provided with a notch 11, the notch 11 is connected to the placement slot, and the notch 11 extends to one end of the placement seat 1 facing the mounting plate 21. The notch 11 is provided to provide additional operating space for the operator, and the operator can more easily adjust the position of the centrifuge tube 100 through the notch 11, so that it can accurately fall into the placement slot, reduce the difficulty of placement, and improve the accuracy and efficiency of placement. When the centrifuge tube 100 needs to be taken out, the grabbing tool can more conveniently clamp the centrifuge tube 200 from the notch 11, avoiding the problem of difficulty in reaching the centrifuge tube 100 due to the relatively closed placement slot, and facilitating subsequent operations such as transfer and detection of the centrifuge tube 100.

[0054] More specifically, the placement seat 1 is provided with an opening 12, the opening 12 is connected to the placement groove, one end of the opening 12 is connected to the notch 11, and the other end passes through the end of the placement seat 1 away from the mounting plate 21, and the width of the opening 12 is smaller than the width of the notch 11. The setting of the opening 12 creates a direct visual window for observing the liquid level in the centrifuge tube 100. The operator does not need to use complex auxiliary tools or perform additional disassembly operations. He only needs to look straight at the opening 12 or make a slight adjustment to clearly see the position of the liquid level in the centrifuge tube 100. This intuitive observation method greatly improves the convenience of observation; and the narrower opening 12 helps to maintain the overall structural strength and stability of the placement seat 1, and can better limit the centrifuge tube 100, preventing the centrifuge tube 100 from accidentally falling off from the opening 12 due to external forces such as vibration and shaking during the operation of the equipment.

[0055] In this embodiment, the centrifuge tube 100 is a 15ml centrifuge tube, the placement seat 1 is a tubular seat, a portion of the placement seat 1 is cut off in a semicircular manner to form a notch 11, and the distance from the end face of the notch 11 after cutting to the sealing rubber ring 203 is greater than the length of the 15ml centrifuge tube, which reserves sufficient space for the placement of the centrifuge tube 100 and subsequent sealing operations, and the uncut semicircular part can provide fixed support for the centrifuge tube 100; and, the width of the opening 12 is not less than 4mm, and the length of the opening 12 is at least 1 / 3 of the length of the centrifuge tube 100. This arrangement can provide a clear observation angle for the operator while maintaining the overall structural strength of the placement seat 1 and the stability of the placement of the centrifuge tube 100.

[0056] Different experiments or production scenarios often require the use of centrifuge tubes 100 of different specifications, such as 5ml, 10ml, 15ml, or even larger capacity centrifuge tubes 100. Therefore, in other embodiments, the size settings of the placement seat 1 and the notch 11 and the opening 12 can be adaptively adjusted according to the specifications of the centrifuge tube 100.

[0057] Specifically, a plurality of placement seats 1 are provided, and the plurality of placement seats 1 are all connected to the output end of the driving mechanism 3. The mounting plate 21 is provided with a plurality of mounting holes 211, and the plurality of mounting holes 211 correspond to the plurality of placement seats 1 one by one. This arrangement can process a plurality of centrifuge tubes 100 at one time, which greatly improves the work efficiency and shortens the overall processing time compared to sequential operation of a single centrifuge tube 100, and meets the needs of large-scale experiments or production. Moreover, since each sealing member 200 is separately equipped with an elastic member 22, when the sealing member 200 is close to the centrifuge tube 100 for sealing operation, the elastic member 22 can be adjusted according to the actual opening of the centrifuge tube 100. According to the situation, the pressure applied by the seal 200 to the centrifuge tube 100 is adaptively adjusted, so that a good fit is achieved between the seal 200 and the centrifuge tube 100. Even if there are slight unevenness on the opening surface of the centrifuge tube 100 or slight deviation in size, the elastic deformation of the elastic member 22 can compensate for these differences, ensuring that the seal 200 is always tightly pressed on the opening of the centrifuge tube 100, thereby achieving a flexible sealing effect. Therefore, when facing centrifuge tubes 100 of different batches and slightly different quality specifications, it can be ensured that each centrifuge tube 100 can obtain a reliable sealing effect, thereby ensuring the stability and reliability of the entire batch sealing operation.

[0058] In this embodiment, the steps of clamping and sealing the sealing member 200 at the opening of the centrifuge tube 100 are as follows:

[0059] Step 1: adjust the placement seat 1 so that the sensor baffle covers the photoelectric sensor 300 away from one end of the sealing component 2, and the placement seat 1 returns to the initial position for placing the centrifuge tube 100;

[0060] Step 2: Place the centrifuge tube 100 into the placement slot along the notch 11. During the placement process, the placement of the centrifuge tube 100 can be observed through the opening 12 of the placement seat 1 to ensure that it is in the correct position in the placement slot to avoid tilting or incomplete placement.

[0061] Step 3: first, sleeve the elastic member 22 onto the connecting rod 201, then insert the connecting rod 201 sleeved with the elastic member 22 into the corresponding mounting hole 211, and finally, clamp the stopper 23 onto the connecting rod 201;

[0062] Step 4, start the motor 31, the motor 31 drives the placement seat 1 to carry the centrifuge tube 100 and move toward the mounting plate 21 until the sensor baffle covers the photoelectric sensor 300 near one end of the sealing assembly 2, and the sealing member 200 fits tightly with the opening of the centrifuge tube 100 with the assistance of the elastic member 22, and the motor 31 is turned off;

[0063] Step 5, remove the limiting member 23 from the connecting rod 201;

[0064] Step six, start the motor 31 again, the motor 31 drives the placement seat 1 to carry the sealed centrifuge tube 100 to move in a direction away from the mounting plate 21 until the sensor baffle blocks the photoelectric sensor 300 away from one end of the sealing assembly 2, turn off the motor 31, and take out the centrifuge tube 100 from the placement slot.

[0065] In this embodiment, step 3 may be performed first and then step 2, or step 3 may be performed first and then step 1 and then step 2, or step 3 and step 2 may be performed simultaneously, or step 1 and step 3 may be performed simultaneously.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sealing auxiliary device, characterized in that: The sealing member (200) is used for clamping and sealing the opening of the centrifuge tube (100), wherein the sealing member (200) comprises a connecting rod (201), a sealing head (202) and a sealing rubber ring (203) which are connected in sequence, and the sealing auxiliary device comprises: A placement seat (1), the placement seat (1) being provided with a placement slot, the placement slot being configured to carry the centrifuge tube (100); A sealing assembly (2), comprising a mounting plate (21), an elastic member (22) and a stopper (23); the mounting plate (21) is provided with a mounting hole (211); the connecting rod (201) is passed through the mounting hole (211); the elastic member (22) is located between the sealing head (202) and the mounting plate (21); the stopper (23) and the sealing head (202) are located on both sides of the mounting plate (21); the stopper (23) is detachably connected to the connecting rod (201); and under the drive of the elastic member (22), the stopper (23) is stopped against the mounting plate (21); A driving mechanism (3), wherein the driving mechanism (3) is capable of driving the placement seat (1) and the sealing assembly (2) to move closer to each other, so that the sealing rubber ring (203) is clamped at the opening of the centrifuge tube (100).

2. The sealing auxiliary device according to claim 1, characterized in that: The mounting plate (21) is provided with an annular groove (212), and the elastic member (22) is sleeved on the connecting rod (201) and partially extends into the annular groove (212).

3. The sealing auxiliary device according to claim 1, characterized in that: The sealing assembly (2) further comprises a guide member (24), wherein the guide member (24) is connected to the mounting plate (21), and the sealing head (202) is provided with a guide channel penetrating along the thickness direction, and the guide member (24) is arranged in the guide channel.

4. The sealing auxiliary device according to claim 3, characterized in that: The mounting plate (21) is provided with a positioning groove, and the sealing assembly (2) further comprises a positioning nut (25), wherein the positioning nut (25) is screwed to the mounting plate (21) and one end thereof extends into the positioning groove, and one end of the guide member (24) extends into the positioning groove and is screwed to the positioning nut (25).

5. The sealing auxiliary device according to claim 1, characterized in that: The driving mechanism (3) comprises a support seat (30), a motor (31), a screw rod (32) and a nut block (33); the motor (31) is mounted on the support seat (30); the screw rod (32) is connected to the output end of the motor (31); the nut block (33) is screwed to the screw rod (32) and slidably connected to the support seat (30); and the placement seat (1) is connected to the nut block (33).

6. The sealing auxiliary device according to claim 5, characterized in that: The driving mechanism (3) further comprises a baffle (34), the baffle (34) being connected to the supporting seat (30), the baffle (34) being provided with a strip-shaped hole (340), the placement seat (1) being provided with a connecting portion, the connecting portion being passed through the strip-shaped hole (340) and connected to the nut block (33), and the connecting portion being capable of moving along the length direction of the strip-shaped hole (340).

7. The sealing auxiliary device according to claim 5, characterized in that: The support seat (30) is provided with a photoelectric sensor (300), and the placement seat (1) is provided with a sensor baffle matching the photoelectric sensor (300).

8. The sealing auxiliary device according to claim 1, characterized in that: The placement seat (1) is provided with a notch (11), the notch (11) is connected to the placement groove, and the notch (11) passes through to one end of the placement seat (1) facing the mounting plate (21).

9. The sealing auxiliary device according to claim 8, characterized in that: The placement seat (1) is provided with an opening (12), the opening (12) is connected to the placement groove, one end of the opening (12) is connected to the notch (11), and the other end passes through to an end of the placement seat (1) away from the mounting plate (21), and the width of the opening (12) is smaller than the width of the notch (11).

10. The sealing auxiliary device according to any one of claims 1 to 9, characterized in that: A plurality of the placement seats (1) are provided, and the plurality of the placement seats (1) are all connected to the output end of the driving mechanism (3); the mounting plate (21) is provided with a plurality of the mounting holes (211), and the plurality of the mounting holes (211) correspond one to one to the plurality of the placement seats (1).

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