PCT content detection device

Abstract

The invention provides a PCT content detection device, and belongs to the technical field of medical detection, and the PCT content detection device provided by the invention comprises a device main body and a placement tray located in the device main body; the shaft body is vertically and rotatably arranged in the device main body, and a driving mechanism for driving the shaft body to rotate is arranged in the device main body; the placing tray is coaxially installed on the shaft body, a plurality of placing shells are rotationally connected to the placing tray in the circumferential direction, placing holes matched with reagent bottles are formed in the tops of the placing shells, and fixing mechanisms used for fixing the reagent bottles are arranged on the placing shells. Rapid mixing of reagents and serum is achieved through centrifugal high-speed rotation, the time cost when multiple batches of reagent bottles are mixed in turn can be effectively reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical detection, and more specifically, relates to a PCT content detection device. Background Art

[0002] PCT (Procalcitonin) content detection is a diagnostic method for evaluating bacterial infection and sepsis. A large number of clinical studies have confirmed that PCT is currently the best biological indicator for bacterial infection or sepsis: 1. In the case of sepsis, an increase in PCT levels can be detected within 3-6 hours, so it can be used for early diagnosis of bacterial infection or sepsis; 2. The half-life of PCT is 20-24 hours. If antibiotic treatment is effective, PCT levels can drop rapidly, so it can be used to monitor the effectiveness of antibiotic treatment; 3. At the same time, PCT levels are also related to the severity of the disease, so they are valuable in disease assessment and prognosis.

[0003] The existing Chinese patent with reference announcement number CN215180248U discloses a procalcitonin content detection device for prognosis evaluation of open heart surgery, including a device body, a power assembly, a transmission assembly and a fixing assembly. A cavity is opened inside the device body, and a groove is opened on the top surface of the device body. The power assembly is located inside the cavity, and the power assembly includes a motor installed inside the cavity and a cam fixedly connected to the output end of the motor. A placement plate is fixedly connected to the top surface of the transmission assembly, and placement holes are evenly opened on the top surface of the placement plate.

[0004] The PCT content test requires the use of equipment to mix the test reagent in the reagent bottle with the procalcitonin in the serum. The detection device in the above patent uses a traditional shaking method of shaking the placement plate up and down to achieve mixing, which requires a long shaking and mixing time, especially when multiple batches of reagent bottles need to be mixed in turn, the time cost is higher. Summary of the invention

[0005] The purpose of the present invention is to provide a PCT content detection device to solve the technical problem that the traditional shaking method in the prior art requires a long shaking and mixing time, especially when multiple batches of reagent bottles need to be mixed in turn, the time cost is higher.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a PCT content detection device, including a device body and a placement tray located in the device body; also including a shaft body vertically rotatably arranged in the device body, and a driving mechanism for driving the shaft body to rotate is arranged in the device body; the placement tray is coaxially installed on the shaft body, and a plurality of placement shells are rotatably connected to the placement tray along the circumferential direction, the top of the placement shell has a placement hole adapted to a reagent bottle, and the placement shell is provided with a fixing mechanism for fixing the reagent bottle.

[0007] In combination with the above technical solution, in a possible implementation, the driving mechanism includes a driving motor and a rotation assembly, the driving motor is installed in the device body and is connected to the shaft body in transmission; the rotation assembly is arranged between the shaft body and each of the placement shells, and the rotation assembly is used to drive all the placement shells to rotate when the shaft body rotates.

[0008] In combination with the above technical solution, in a possible implementation, the self-rotating assembly includes a self-rotating gear, an internal gear ring, a driving gear and a direction-changing transmission member, the self-rotating gear is coaxially fixed on the outside of the placement shell, the internal gear ring is rotatably arranged in the device body, the inner circumferential surface of the internal gear ring has teeth and is engaged with all the self-rotating gears; the driving gear is coaxially fixed on the shaft body, the direction-changing transmission member is arranged between the driving gear and the internal gear ring, and the direction-changing transmission member is used to drive the internal gear ring to rotate in the same direction at a speed lower than the rotation speed of the shaft body when the shaft body rotates.

[0009] In combination with the above technical solution, in a possible implementation, the direction-changing transmission member includes two direction-changing gears meshing with each other, wherein one direction-changing gear meshes with the driving gear, and the other direction-changing gear meshes with the internal gear ring.

[0010] In combination with the above technical solution, in a possible implementation method, the fixing mechanism includes a top block, a driving member and a reset member, a sliding hole is opened on the outside of the placement shell, one end of the top block is slidably connected to the sliding hole, and the end surface of the top block located in the sliding hole is an arc shape adapted to the reagent bottle; the driving member is used to drive the top block to slide downward away from the reagent bottle; the reset member is arranged on the outside of the placement shell and is used to drive the top block to press the reagent bottle tightly when the top block is not subjected to force.

[0011] In combination with the above technical solution, in a possible implementation, a mounting hole for inserting the shaft body is opened in the middle of the placement tray, and a connecting mechanism is provided between the placement tray and the shaft body, and the connecting mechanism is used to fix or release the placement tray and the shaft body.

[0012] In combination with the above technical solution, in a possible implementation method, the fixing mechanism also includes a limit block, which is fixed to one end of the top block outside the sliding hole, and a rotating groove is formed on the bottom surface of the placement tray for the top of the limit block to rotate inside, and a limit groove is formed on the side of the rotating groove close to the driving member for the top of the limit block to be inserted, and one end of the top block is always located in the sliding hole.

[0013] In combination with the above technical solution, in a possible implementation, the driving member is an annular electromagnet, the driving member is coaxially fixed on the bottom surface of the placement tray and faces all top blocks, and the top blocks are made of ferromagnetic material.

[0014] In combination with the above technical solution, in a possible implementation, the reset member is a spring, the reset member is connected between the outer peripheral surface of the placement shell and the outer end of the top block, and the reset member is always in a stretched state; the end surface of the top block located in the sliding hole is provided with a damping hole connected to the outside.

[0015] In combination with the above technical solution, in a possible implementation, the connecting mechanism includes a connecting spring, a card block, a rotating column and an extrusion block; a plurality of accommodating grooves are provided on the inner wall of the mounting hole, the connecting spring is installed in the accommodating groove, the card block is slidably arranged at the opening of the accommodating groove and is connected to the connecting spring; a socket for inserting the corresponding card block is provided on the side wall of the shaft body, and the bottom of the card block inserted into the socket is inclined; the bottom end of the rotating column is coaxially rotatably connected to the shaft body, the extrusion block is fixed on the side wall of the rotating column and is located in the socket, and the two sides of the extrusion block are arc surfaces and are used to push the corresponding card block out of the socket.

[0016] The beneficial effect of a PCT content detection device provided by the present invention is that: compared with the prior art, the present invention first inserts multiple reagent bottles into corresponding placement shells, fixes each reagent bottle through a fixing mechanism, starts a driving mechanism to drive the shaft to rotate, and the shaft drives the placement tray and each placement shell to rotate, and realizes rapid mixing of reagents and serum through centrifugal high-speed rotation, replacing the traditional shaking method, which can effectively reduce the time cost of mixing multiple batches of reagent bottles in turn and improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1A schematic diagram of the structure of a PCT content detection device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a placement tray and a driving mechanism provided in an embodiment of the present invention; Figure 3 A partial cross-sectional view of a fixing mechanism provided in an embodiment of the present invention; Figure 4 A partial cross-sectional view of a connection mechanism provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a rotating column and an extrusion block provided in an embodiment of the present invention.

[0019] Among them, the reference numerals in the figures are as follows: 1. Device body; 2. Placement tray; 21. Mounting hole; 22. Rotation slot; 23. Limiting slot; 24. Accommodating slot; 3. Axle; 31. Socket; 4. Driving mechanism; 41. Driving motor; 42. Rotation assembly; 421. Rotation gear; 422. Internal gear ring; 423. Driving gear; 424. Direction-changing transmission member; 5. Placement shell; 51. Placement hole; 52. Sliding hole; 6. Fixing mechanism; 61. Top block; 611. Damping hole; 62. Driving member; 63. Resetting member; 64. Limiting block; 7. Connecting mechanism; 71. Connecting spring; 72. Block; 73. Rotating column; 74. Extrusion block. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0021] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0022] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. The directions or positional relationships indicated by the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0024] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0026] A PCT content detection device provided by the present invention is now described.

[0027] like Figures 1 to 3As shown, one embodiment of the present invention provides a PCT content detection device, including a device body 1 and a placement tray 2 located in the device body 1; it also includes a shaft body 3 vertically rotatably arranged in the device body 1, and a driving mechanism 4 for driving the shaft body 3 to rotate is arranged in the device body 1; the placement tray 2 is coaxially installed on the shaft body 3, and a plurality of placement shells 5 are rotatably connected to the placement tray 2 along the circumferential direction, the top of the placement shell 5 has a placement hole 51 adapted to the reagent bottle, and the placement shell 5 is provided with a fixing mechanism 6 for fixing the reagent bottle.

[0028] Compared with the prior art, a PCT content detection device provided in this embodiment first inserts multiple reagent bottles into corresponding placement shells 5, and after each reagent bottle is fixed by a fixing mechanism 6, a driving mechanism 4 is started to drive the shaft body 3 to rotate, and the shaft body 3 drives the placement tray 2 and each placement shell 5 to rotate, and the reagent and serum are quickly mixed through centrifugal high-speed rotation, which replaces the traditional shaking method, can effectively reduce the time cost of mixing multiple batches of reagent bottles in turn, and improve the detection efficiency.

[0029] like Figure 1 to Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The driving mechanism 4 includes a driving motor 41 and a rotation assembly 42. The driving motor 41 is installed in the device body 1 and is connected to the shaft body 3 in transmission. The rotation assembly 42 is arranged between the shaft body 3 and each placement shell 5. The rotation assembly 42 is used to drive all the placement shells 5 to rotate when the shaft body 3 rotates.

[0030] The shaft body 3 can be driven to rotate by driving the motor 41, and the shaft body 3 realizes the revolution of each placement shell 5 through the placement tray 2. At the same time, the rotation component 42 realizes the rotation of the placement shell 5, which further increases the complexity and sufficiency of the mixing in the reagent bottle. Compared with simple overall circular motion or shaking in a single direction, the reagent can be mixed with the procalcitonin in the serum more quickly and effectively, reducing the mixing time.

[0031] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The self-rotating assembly 42 includes a self-rotating gear 421, an inner gear ring 422, a driving gear 423 and a direction-changing transmission member 424. The self-rotating gear 421 is coaxially fixed on the outside of the placement shell 5, and the inner gear ring 422 is rotatably arranged in the device body 1. The inner circumferential surface of the inner gear ring 422 has teeth and is engaged with all the self-rotating gears 421; the driving gear 423 is coaxially fixed on the shaft body 3, and the direction-changing transmission member 424 is arranged between the driving gear 423 and the inner gear ring 422. The direction-changing transmission member 424 is used to drive the inner gear ring 422 to rotate in the same direction at a speed lower than the rotation speed of the shaft body 3 when the shaft body 3 rotates.

[0032] When the driving motor 41 drives the shaft 3 to rotate, the driving gear 423 drives the inner gear ring 422 to rotate in the same direction at a low speed through the changing transmission member 424, and the inner gear ring 422 drives each placement shell 5 to rotate at the same time through the rotating gear 421, so that all reagent bottles can rotate while revolving, thereby improving the mixing effect in the reagent bottles.

[0033] Since the rotation speed of the shaft body 3 and the driving gear 423 is relatively fast, and the transmission ratio between the inner gear ring 422 and the self-rotating gear 421 is relatively large, if the inner gear ring 422 is fixed, the rotation speed of the self-rotating gear 421 will be too high, which will increase the burden on the placement shell 5 and be more dangerous. Therefore, the inner gear ring 422 is rotated at a low speed in the same direction as the shaft body 3 through the changing transmission part 424, which can realize the self-rotation of the placement shell 5 through the speed difference between the self-rotating gear 421 and the inner gear ring 422, and can also realize the deceleration of the self-rotation of the placement shell 5, thereby improving safety.

[0034] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The direction-changing transmission member 424 includes two direction-changing gears meshing with each other, wherein one direction-changing gear meshes with the driving gear 423 , and the other direction-changing gear meshes with the inner gear ring 422 .

[0035] The differential adjustment of the same-direction rotation between the driving gear 423 and the inner gear ring 422 is achieved through two changing gears. The structure is compact and the transmission is reliable. The rotation of the shaft body 3 can be accurately transmitted to the inner gear ring 422 according to the design requirements, so that the inner gear ring 422 can rotate at a suitable speed, ensuring the normal operation of the entire rotation assembly 42, and further ensuring the rotation effect of the placement shell 5.

[0036] like Figure 3 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The fixing mechanism 6 includes a top block 61, a driving member 62 and a reset member 63. A sliding hole 52 is provided on the outer side of the placement shell 5. One end of the top block 61 is slidably connected in the sliding hole 52. The end surface of the top block 61 located in the sliding hole 52 is an arc shape adapted to the reagent bottle; the driving member 62 is used to drive the top block 61 to slide downward away from the reagent bottle; the reset member 63 is arranged on the outer side of the placement shell 5 and is used to drive the top block 61 to press against the reagent bottle when the top block 61 is not subjected to force.

[0037] Before reagent mixing, each top block 61 is driven by the driving member 62 to slide in the direction away from the reagent bottle. After the reagent bottle is inserted into each placement shell 5, the restriction of the driving member 62 on the top block 61 is released, and the reset member 63 drives each top block 61 to tighten the corresponding reagent bottle to prevent the reagent bottle from shaking, tipping over or detaching from the placement shell 5 during the operation of the device, thereby ensuring the stability and safety of the mixing process of the substances in the reagent bottle and facilitating the operation of taking and placing the reagent bottle.

[0038] like Figure 4 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: A mounting hole 21 for inserting the shaft body 3 is provided in the middle of the placement tray 2 , and a connecting mechanism 7 is provided between the placement tray 2 and the shaft body 3 . The connecting mechanism 7 is used to fix or release the placement tray 2 and the shaft body 3 .

[0039] The connection mechanism 7 can be used to realize disassembly between the placement tray 2 and the shaft body 3, which facilitates the maintenance, replacement or adjustment of the placement tray 2 and the placement shell 5, reagent bottles and other components thereon, thereby increasing the operability and flexibility of the device and facilitating rapid adjustment of the device under different detection requirements.

[0040] like Figure 3 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The fixing mechanism 6 also includes a limit block 64, which is fixed to one end of the top block 61 outside the sliding hole 52. A rotating groove 22 is provided on the bottom surface of the placement tray 2 for the top of the limit block 64 to rotate inside. A limit groove 23 is provided on the side of the rotating groove 22 close to the driving member 62 for the top of the limit block 64 to be inserted. One end of the top block 61 is always located in the sliding hole 52.

[0041] When the driving member 62 does not restrict the top block 61 , the top block 61 is in a state of pressing the reagent bottle tightly. At this time, the top end of the limit block 64 is located in the rotation groove 22 , and can achieve a state of synchronous rotation with the top block 61 and the placement shell 5 .

[0042] When the placement tray 2 and the placement shell 5 are in the initial state or after the rotation is completed and reset, when the driving member 62 drives the top block 61 to move in the direction away from the reagent bottle, the top of the limit block 64 is inserted into the limit groove 23. At this time, the placement shell 5 is restricted by the limit block 64 and the top block 61 and cannot rotate, which not only facilitates the taking and placing of the reagent bottle in the placement shell 5, but also enables the angle of the autorotating gear 421 to remain unchanged when the placement tray 2 is disassembled and assembled, so as to improve the accuracy and stability of the disengagement or engagement of the autorotating gear 421 with the internal gear.

[0043] like Figure 3 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The driving member 62 is a ring-shaped electromagnet, which is coaxially fixed on the bottom surface of the placement tray 2 and faces all the top blocks 61 . The top blocks 61 are made of ferromagnetic material.

[0044] The electromagnetic drive mode has the characteristics of fast response speed and convenient control, and can accurately control all the top blocks 61 to slide synchronously. It is also easy to integrate with the electrical control system of the device to improve the automation level of the device.

[0045] like Figure 3 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The reset member 63 is a spring, which is connected between the outer peripheral surface of the placement shell 5 and the outer end of the top block 61. The reset member 63 is always in a stretched state; the end surface of the top block 61 located in the sliding hole 52 is provided with a damping hole 611 connected to the outside.

[0046] Specifically, in this embodiment, the top block 61 and the limit block 64 are integrally formed, and the reset member 63 is connected between the placement shell 5 and the limit block 64 .

[0047] The spring can always exert a reset effect on the top block 61 toward the reagent bottle. At the same time, the damping hole 611 can play an air friction buffer role when the top block 61 slides, avoiding the top block 61 from sliding too fast, so as to improve the safety of the reagent bottle.

[0048] like Figure 4 and Figure 5 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The connecting mechanism 7 includes a connecting spring 71, a clamping block 72, a rotating column 73 and an extrusion block 74. A plurality of accommodating grooves 24 are provided on the inner wall of the mounting hole 21. The connecting spring 71 is installed in the accommodating groove 24. The clamping block 72 is slidably arranged at the opening of the accommodating groove 24 and is connected to the connecting spring 71. A plug hole 31 for inserting the corresponding clamping block 72 is provided on the side wall of the shaft body 3. The bottom of the clamping block 72 inserted into the plug hole 31 is inclined. The bottom end of the rotating column 73 is coaxially rotatably connected to the shaft body 3. The extrusion block 74 is fixed on the side wall of the rotating column 73 and is located in the plug hole 31. The two sides of the extrusion block 74 are arc surfaces and are used to push the corresponding clamping block 72 out of the plug hole 31.

[0049] The connecting spring 71 provides elastic force for the clamping block 72, and the clamping block 72 is inserted into the insertion hole 31 on the side wall of the shaft body 3 to achieve fixation; the rotating column 73 drives the extrusion block 74 to push the clamping block 72 out of the insertion hole 31 to achieve release. This can ensure the stability of the connection between the placement tray 2 and the shaft body 3, and can easily release the fixation when needed, thereby improving the maintainability of the device and the convenience of component replacement.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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 present invention.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. A PCT content detection device, comprising a device body (1) and a placement tray (2) located in the device body (1); characterized in that: The device also comprises a shaft (3) which is arranged in a vertically rotatable manner in the device body (1); a driving mechanism (4) is arranged in the device body (1) for driving the shaft (3) to rotate; the placement tray (2) is coaxially mounted on the shaft (3); a plurality of placement shells (5) are rotatably connected to the placement tray (2) in a circumferential direction; the placement shells (5) have placement holes (51) adapted to the reagent bottles at the top; and a fixing mechanism (6) for fixing the reagent bottles is arranged on the placement shells (5).

2. A PCT content detection device according to claim 1, characterized in that: The driving mechanism (4) comprises a driving motor (41) and a rotation assembly (42); the driving motor (41) is installed in the device body (1) and is in driving connection with the shaft body (3); the rotation assembly (42) is arranged between the shaft body (3) and each of the placement shells (5); the rotation assembly (42) is used to drive all the placement shells (5) to rotate when the shaft body (3) rotates.

3. A PCT content detection device as claimed in claim 2, characterized in that: The self-rotating assembly (42) comprises a self-rotating gear (421), an inner gear ring (422), a driving gear (423) and a direction-changing transmission member (424); the self-rotating gear (421) is coaxially fixed to the outside of the placement shell (5); the inner gear ring (422) is rotatably arranged in the device body (1); the inner circumferential surface of the inner gear ring (422) has teeth and meshes with all the self-rotating gears (421); the driving gear (423) is coaxially fixed to the shaft body (3); the direction-changing transmission member (424) is arranged between the driving gear (423) and the inner gear ring (422); the direction-changing transmission member (424) is used to drive the inner gear ring (422) to rotate in the same direction at a speed lower than the rotation speed of the shaft body (3) when the shaft body (3) rotates.

4. A PCT content detection device as claimed in claim 3, characterized in that: The direction-changing transmission member (424) comprises two direction-changing gears meshing with each other, wherein one direction-changing gear meshes with the driving gear (423), and the other direction-changing gear meshes with the inner gear ring (422).

5. A PCT content detection device as claimed in claim 2, characterized in that: The fixing mechanism (6) comprises a top block (61), a driving member (62) and a reset member (63); a sliding hole (52) is provided on the outside of the placement shell (5); one end of the top block (61) is slidably connected to the sliding hole (52); the end surface of the top block (61) located in the sliding hole (52) is in an arc shape adapted to the reagent bottle; the driving member (62) is used to drive the top block (61) to slide downward away from the reagent bottle; the reset member (63) is arranged on the outside of the placement shell (5) and is used to drive the top block (61) to press against the reagent bottle when the top block (61) is not subjected to force.

6. A PCT content detection device as claimed in claim 5, characterized in that: A mounting hole (21) for inserting the shaft body (3) is provided in the middle of the placement tray (2), and a connecting mechanism (7) is provided between the placement tray (2) and the shaft body (3), and the connecting mechanism (7) is used to fix or release the placement tray (2) and the shaft body (3).

7. A PCT content detection device as claimed in claim 6, characterized in that: The fixing mechanism (6) further comprises a limit block (64), wherein the limit block (64) is fixed to one end of the top block (61) located outside the slide hole (52), a rotation groove (22) is provided on the bottom surface of the placement tray (2) for the top of the limit block (64) to rotate inside, and a limit groove (23) is provided on one side of the rotation groove (22) close to the driving member (62) for the top of the limit block (64) to be inserted, and one end of the top block (61) is always located in the slide hole (52).

8. A PCT content detection device as claimed in claim 5, characterized in that: The driving member (62) is a ring-shaped electromagnet, and the driving member (62) is coaxially fixed on the bottom surface of the placement tray (2) and faces all the top blocks (61), and the top blocks (61) are made of ferromagnetic material.

9. A PCT content detection device as claimed in claim 5, characterized in that: The reset member (63) is a spring, and is connected between the outer peripheral surface of the placement shell (5) and the outer end of the top block (61). The reset member (63) is always in a stretched state; the end surface of the top block (61) located in the sliding hole (52) is provided with a damping hole (611) connected to the outside.

10. A PCT content detection device as claimed in claim 6, characterized in that: The connecting mechanism (7) comprises a connecting spring (71), a clamping block (72), a rotating column (73) and an extruding block (74); a plurality of accommodating grooves (24) are provided on the inner wall of the mounting hole (21); the connecting spring (71) is installed in the accommodating groove (24); the clamping block (72) is slidably arranged at the opening of the accommodating groove (24) and is connected to the connecting spring (71); a plug hole (31) for inserting the corresponding clamping block (72) is provided on the side wall of the shaft body (3); the bottom of the clamping block (72) inserted into the plug hole (31) is arranged obliquely; the bottom end of the rotating column (73) is coaxially rotatably connected to the shaft body (3); the extruding block (74) is fixed on the side wall of the rotating column (73) and is located in the plug hole (31); both sides of the extruding block (74) are arc surfaces and are used to push the corresponding clamping block (72) out of the plug hole (31).

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