A detachable measuring module and a colloid osmotic pressure measuring instrument

Abstract

The application provides a detachable measuring module and a colloid osmotic pressure measuring instrument, and relates to the technical field of medical instruments.The detachable measuring module comprises a shell, a connecting part for detachable connection with an instrument main machine of the colloid osmotic pressure measuring instrument is arranged on the shell, a lower measuring body is fixedly arranged on the shell, an upper measuring body is connected with the lower measuring body through a locking part, a semi-permeable membrane is clamped between the lower measuring body and the upper measuring body, and a pressure sensing unit is arranged in the shell and is electrically connected with a connector on the shell.When the semi-permeable membrane of the detachable measuring module needs to be replaced, the detachable measuring module can be detached from the instrument main machine of the colloid osmotic pressure measuring instrument, and then another detachable measuring module provided with a new semi-permeable membrane can be installed on the instrument main machine, so that the normal use of the colloid osmotic pressure measuring instrument is not affected.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a detachable measurement module and a colloid osmotic pressure measuring instrument. Background Technology

[0002] A colloid osmometer is an analytical instrument used to measure the osmotic pressure of colloids in a solution. Commonly used methods for measuring colloid osmotic pressure include freezing point depression, boiling point elevation, vapor pressure depression, and semi-permeable membrane method. Among these, colloid osmometers using the semi-permeable membrane method are often used to measure the osmotic pressure of plasma, tissue fluid, protein, or polymer solutions.

[0003] Currently, existing colloid osmotic pressure measuring instruments using the semi-permeable membrane method typically consist of a main unit and a measurement module. The measurement module includes a semi-permeable membrane, a pressure sensing unit, a lower measuring body with a reference chamber, an upper measuring body with a sample chamber, and nuts for fixing and connecting the lower and upper measuring bodies. For example, utility model CN221860222U discloses a high-sealing measuring chamber and a colloid osmotic pressure measuring instrument. The high-sealing measuring chamber (equivalent to the measurement module) includes a first assembly (equivalent to the lower measuring body), a second assembly connected to the first assembly (equivalent to the upper measuring body), and connecting components (equivalent to nuts) connected to both the first and second assemblies. The first assembly is the part of the high-sealing measuring chamber that contains the liquid sample for measurement. The first assembly has a cylindrical hollow structure, with a connecting chamber at the bottom and a detection chamber connected to the connecting chamber. The connecting chamber is adapted to a pressure sensor, thereby placing the pressure sensor inside the connecting chamber to measure the real-time osmotic pressure of the sample.

[0004] Due to multiple factors such as physical property wear, decreased detection accuracy, and contamination risks, the semi-permeable membrane of a colloid osmotic pressure measuring instrument needs to be replaced periodically or as needed. However, the replacement of the semi-permeable membrane must follow strict instrument accuracy standards and can usually only be performed by the manufacturer's technicians. In the existing technology, the lower measuring body and pressure sensing unit of the colloid osmotic pressure measuring instrument's measurement module are usually fixedly installed on the instrument's main unit. Therefore, when the semi-permeable membrane needs to be replaced, one can only wait for the manufacturer's technicians to come and replace it or send the colloid osmotic pressure measuring instrument to the manufacturer for replacement, thus delaying the normal use of the colloid osmotic pressure measuring instrument. Utility Model Content

[0005] The purpose of this application is to provide a separable measurement module and a colloid osmotic pressure measuring instrument to solve the problem in related technologies where, when replacing the semipermeable membrane, the colloid osmotic pressure measuring instrument can only wait for the manufacturer's technicians to come to the site for replacement or send the colloid osmotic pressure measuring instrument to the manufacturer for replacement, thus delaying the normal use of the colloid osmotic pressure measuring instrument.

[0006] Firstly, the detachable measurement module provided in this application adopts the following technical solution:

[0007] A detachable measurement module, comprising:

[0008] The housing has a connection part for detachably connecting to the main unit of the colloid osmotic pressure measuring instrument;

[0009] The lower measuring body is fixed to the housing;

[0010] An upper measuring body, which is connected to a lower measuring body via a locking element;

[0011] A semi-permeable membrane, wherein the semi-permeable membrane is sandwiched between the lower measuring body and the upper measuring body;

[0012] A pressure sensing unit is disposed inside a housing. The housing is provided with a connector for electrical connection with the pressure sensing unit. The connector is used for detachable electrical connection with the main unit of the colloid osmotic pressure measuring instrument.

[0013] Secondly, the colloid osmotic pressure measuring instrument provided in this application adopts the following technical solution:

[0014] A colloidal osmotic pressure measuring instrument, including the aforementioned detachable measuring module, further includes:

[0015] The instrument host includes a housing, the housing is provided with a positioning element for positioning the housing, and the instrument host is provided with an electrical connector that is detachably electrically connected to the connector.

[0016] A fastener is provided on the housing and can be detachably and fixedly connected to the connecting part of the housing.

[0017] Optionally, the device may also include a separation mechanism and a transfer mechanism disposed on the housing. The separation mechanism is used to separate the electrical connector from the joint and to separate the fixing member from the connection part. The transfer mechanism is used to transfer the detachable measurement module into the housing. The housing is provided with an opening for removing the detachable measurement module, and the opening of the housing is provided with an openable and closable door panel.

[0018] Optionally, the separation mechanism includes a telescopic drive and a slide block. The slide block is slidably mounted on the housing. The electrical connector and the fixing member are fixed on the slide block. The telescopic drive is fixed on the housing and connected to the slide block. The telescopic drive is used to drive the slide block to telescopically move relative to the housing.

[0019] Optionally, the transfer mechanism includes a support, a lifting assembly, a pushing assembly, a limiting member, and a fastening assembly. The lifting assembly is connected to the support and is used to drive the support to lift. The positioning member is disposed on the support, and the limiting member is disposed inside the housing. The pushing assembly is used to push the detachable measuring module on the positioning member onto the limiting member, and the fastening assembly is used to fasten the detachable measuring module onto the limiting member.

[0020] Optionally, the transfer mechanism further includes a rotating component, the positioning element includes a positioning seat, the positioning seat is rotatably mounted on the support, the positioning seat is provided with a first guide rail, the housing can slide and engage with the first guide rail, the first guide rail is provided with a stop block that can abut against the housing, the limiting element is a second guide rail provided inside the housing, when the lifting component drives the support to descend to the same height as the first guide rail and the second guide rail, the rotating component can drive the positioning seat to rotate until the first guide rail and the second guide rail are aligned.

[0021] Optionally, the rotating assembly includes a worm and a rack, the positioning seat is provided with a worm wheel, the worm is rotatably mounted on the support and meshes with the worm wheel, the rack is fixed to the housing, and the worm is provided with a gear that meshes with the rack.

[0022] Optionally, the pushing assembly includes a longitudinal drive, a longitudinal seat, a transverse drive, and a crossbar. The longitudinal drive is located inside the housing. The longitudinal seat is connected to the longitudinal drive. The transverse drive and the crossbar are located on the longitudinal seat. The transverse drive is connected to the crossbar and is used to drive the crossbar to move laterally. The crossbar can push against the housing.

[0023] In summary, this application includes at least the following beneficial technical effects: When the semi-permeable membrane of the separable measurement module of this application needs to be replaced, the connecting part and connector of the separable measurement module are first separated from the instrument host of the colloid osmotic pressure measuring instrument. Then, the separable measurement module can be disassembled from the instrument host of the colloid osmotic pressure measuring instrument. At this time, another separable measurement module equipped with an unused semi-permeable membrane can be installed on the instrument host so that the staff can immediately carry out colloid osmotic pressure measurement operations. The disassembled separable measurement module can wait for the manufacturer's technicians to come and replace it or send it to the manufacturer for replacement, thereby reducing the delay in the normal use of the colloid osmotic pressure measuring instrument and improving measurement efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the colloid osmotic pressure measuring instrument in the embodiments of this application;

[0025] Figure 2 This is a cross-sectional view of the colloidal osmotic pressure measuring instrument in the embodiments of this application from a first perspective;

[0026] Figure 3 This is a cross-sectional view of the colloid osmotic pressure measuring instrument in the embodiments of this application from a second perspective;

[0027] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0028] Figure 5 This is a cross-sectional view of the colloidal osmotic pressure measuring instrument in the embodiments of this application from a third perspective;

[0029] Figure 6 for Figure 5 A magnified view of part B in the middle section;

[0030] Figure 7 This is a cross-sectional view of the colloidal osmotic pressure measuring instrument in the embodiments of this application from a fourth perspective.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Separable measuring module; 11. Housing; 111. First iron plate; 112. Second iron plate; 12. Lower measuring body; 121. Reference chamber; 122. Groove; 123. Measuring hole; 124. Positioning pin; 13. Upper measuring body; 131. Sample chamber; 132. Liquid inlet channel; 133. Liquid outlet channel; 134. Cleaning fluid interface; 135. Waste liquid interface; 136. Annular boss; 14. Semi-permeable membrane; 15. Pressure sensing unit; 16. Connector; 17. Support sieve plate; 18. Sealing ring; 19. Sealing plug; 110. Locking cover;

[0033] 20. Main unit of the instrument; 21. Housing; 211. Vertical guide rod; 212. Longitudinal guide rod; 213. Circular groove; 214. Guide groove; 22. Electrical connector; 23. Door panel; 24. Second guide rail;

[0034] 30. Separation mechanism; 31. Telescopic drive component; 32. Slide; 40. Support; 41. Vertical threaded sleeve; 50. Lifting assembly; 51. Lifting drive motor; 52. Vertical screw;

[0035] 60. Horizontal push assembly; 61. Longitudinal drive motor; 62. Longitudinal screw; 63. Longitudinal seat; 631. Longitudinal threaded sleeve; 632. Guide sleeve; 64. Transverse drive motor; 641. Gear plate; 65. Crossbar; 651. Gear row;

[0036] 70. Rotating assembly; 71. Worm gear; 711. Gear; 72. Rack; 80. Positioning seat; 81. First guide rail; 82. Stop block; 83. Worm wheel; 90. Fastening assembly; 91. Push-pull drive component; 92. Bracket; 921. Column; 93. Second magnet block; 100. First magnet block; 120. Connecting pipe; 130. Connecting rope. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0038] Example 1

[0039] This embodiment discloses a detachable measurement module.

[0040] A detachable measurement module includes a housing 11, a lower measuring body 12, an upper measuring body 13, a semi-permeable membrane 14, a pressure sensing unit 15, a supporting sieve plate 17, a sealing ring 18, and a sealing plug 19.

[0041] Reference Figures 1 to 5 The lower measuring body 12 is fixed to the housing 11, and the upper measuring body 13 is connected to the lower measuring body 12 via a locking member. A semi-permeable membrane 14 is clamped between the lower measuring body 12 and the upper measuring body 13. The locking member can be a locking cover 110. In an optional embodiment, the specific connection relationship between the lower measuring body 12, the upper measuring body 13, and the locking cover 110 is as follows: The lower measuring body 12 is provided with a groove 122, a supporting sieve plate 17 is placed in the groove 122 of the lower measuring body 12, the semi-permeable membrane 14 is attached to the upper surface of the supporting sieve plate 17, and a sealing ring 18 is placed on the upper surface of the semi-permeable membrane 14. The upper measuring body 13 is placed on the lower measuring body 12 and abuts against the sealing ring 18. The lower measuring body 12 is provided with a positioning pin 124 that is inserted into the upper measuring body 13. The upper measuring body 13 is provided with an annular boss 136, the locking cover 110 is provided with an internal thread, and the lower measuring body 12 is provided with an external thread around its periphery. The locking cover 110 is screwed to the lower measuring body 12 through the internal thread, and abuts against the upper surface of the annular boss 136 through the inner end face of the locking cover 110.

[0042] The lower measuring body 12 is equipped with a reference chamber 121, which is used to contain physiological saline or buffer solution. The upper measuring body 13 is equipped with a sample chamber 131, which is used to contain the sample to be tested (such as plasma, ascites, etc.). The reference chamber 121 and the sample chamber 131 are separated by a semi-permeable membrane 14 to form an osmotic system, allowing only water molecules to pass through. The upper measuring body 13 is equipped with an inlet channel 132 and an outlet channel 133 that communicate with the sample chamber 131, as well as a cleaning solution interface 134 and a waste liquid interface 135 that are respectively connected to the inlet channel 132 and the outlet channel 133. The cleaning solution interface 134 and the waste liquid interface 135 are respectively connected to the cleaning solution bottle and the waste liquid bottle of the instrument host 20 through connecting tubes 120. The sealing plug 19 can be engaged with the sample chamber 131 and is connected to the instrument host 20 through a connecting rope 130.

[0043] The housing 11 is provided with a connection part for detachable connection with the instrument host 20 of the colloid osmotic pressure measuring instrument. The housing 11 is also provided with a connector 16 for electrical connection with the pressure sensing unit 15. The connector 16 is used for detachable electrical connection with the instrument host 20 of the colloid osmotic pressure measuring instrument. The pressure sensing unit 15 is located inside the housing 11. The lower measuring body 12 is provided with a measuring hole 123 for the measuring end of the pressure sensing unit 15 to communicate with the reference chamber 121. The pressure difference between the sample chamber 131 and the reference chamber 121 can be measured in real time through the pressure sensing unit 15, and the measurement signal is transmitted to the data processing system of the instrument host 20 through the connector 16. Then, the pressure difference measurement signal is converted into the colloidal osmotic pressure of the sample by the osmotic balance algorithm built into the microprocessor of the data processing system.

[0044] When the semi-permeable membrane 14 of the separable measurement module 10 of this application needs to be replaced, first separate the connecting part and connector 16 of the separable measurement module 10 from the instrument host 20 of the colloid osmotic pressure measuring instrument. Then, the separable measurement module 10 can be disassembled from the instrument host 20 of the colloid osmotic pressure measuring instrument. At this time, another separable measurement module 10 equipped with an unused semi-permeable membrane 14 can be installed on the instrument host 20 so that the staff can immediately carry out colloid osmotic pressure measurement operations. The disassembled separable measurement module 10 can wait for the manufacturer's technicians to come and replace it or send it to the manufacturer for replacement, thereby reducing the delay in the normal use of the colloid osmotic pressure measuring instrument and improving measurement efficiency.

[0045] Example 2

[0046] This embodiment discloses a colloidal osmotic pressure measuring instrument.

[0047] A colloidal osmotic pressure measuring instrument includes an instrument main unit 20, a detachable measuring module 10, a fixing component, a separation mechanism 30, and a transfer mechanism.

[0048] Reference Figures 3 to 6 The instrument host 20 includes a housing 21. The housing 21 of the instrument host 20 is provided with an electrical connector 22 that is detachably electrically connected to the connector 16. The electrical connector 22 is electrically connected to the data processing system of the instrument host 20. The housing 21 is provided with a positioning member for positioning the housing 11. A fixing member is provided on the housing 21 and can be detachably and fixedly connected to the connecting part of the housing 11.

[0049] In an optional embodiment, the specific structures of the positioning and fixing components, and their connection relationship with the housing 11, are as follows: The positioning component includes a positioning seat 80, on which a first guide rail 81 is provided. The first guide rail 81 is provided with a stop 82 that can abut against the housing 11. The housing 11 is provided with a sliding groove, and the housing 11 can slide and engage with the first guide rail 81 through the sliding groove. The fixing component is a first magnet block 100, and the connecting part is a first iron plate 111 fixed on the housing 11. The first iron plate 111 can be attracted and connected to the first magnet block 100. When it is necessary to install the detachable measurement module 10 onto the instrument host 20, the housing 11 slides and engages with the first guide rail 81 through the sliding groove until it abuts against the stop 82 to achieve positioning. At the same time, the housing 11 is attracted and connected to the first magnet block 100 through the first iron plate 111 to fix the housing 11.

[0050] A separation mechanism 30 is mounted on the housing 21. The separation mechanism 30 is used to separate the electrical connector 22 from the connector 16 and to separate the fixing member from the connecting part. More specifically, the separation mechanism 30 includes a telescopic drive member 31 and a slide 32. The housing 21 has a guide groove 214, and the slide 32 is slidably disposed within the guide groove 214 on the housing 21. The electrical connector 22 and the fixing member are fixedly mounted on the slide 32. The telescopic drive member 31 is fixedly mounted on the housing 21 and connected to the slide 32. The telescopic drive member 31 is used to drive the slide 32 to telescopically move relative to the housing 21. The telescopic drive member 31 can be a telescopic drive electric push rod, and the telescopic rod of the telescopic drive electric push rod is fixedly connected to the slide 32.

[0051] The sliding block 32 can be driven to move away from the housing 11 by the telescopic drive 31, thereby separating the first magnet block 100 from the first iron plate 111 and separating the electrical connector 22 from the connector 16.

[0052] Reference Figures 2 to 7 A transfer mechanism is located on the housing 21. The transfer mechanism is used to transfer the detachable measurement module 10 into the housing 21. The housing 21 has an opening for removing the detachable measurement module 10, and the opening of the housing 21 has an openable and closable door panel 23. When the semi-permeable membrane 14 of the detachable measurement module 10 needs to be replaced, the electrical connector 22 can be separated from the connector 16 through the separation mechanism 30, and the fixing part can be separated from the connection part. Then, the detachable measurement module 10 is transferred into the housing 21 through the transfer mechanism. The detachable measurement module 10 is temporarily stored in the housing 21. After opening the door panel 23, the detachable measurement module 10 can be taken out to replace the semi-permeable membrane 14.

[0053] In an optional embodiment, the transfer mechanism may have the following structure: the transfer mechanism includes a support 40, a lifting assembly 50, a horizontal pushing assembly 60, a limiting member, a fastening assembly 90, and a rotating assembly 70. The lifting assembly 50 is connected to the support 40 and is used to drive the support 40 to rise and fall. A positioning member is disposed on the support 40, and the limiting member is disposed inside the housing 21. The limiting member is a second guide rail 24 disposed inside the housing 21. When the lifting assembly 50 drives the support 40 to descend to the same height as the first guide rail 81 and the second guide rail 24, the rotating assembly 70 can drive the positioning seat 80 to rotate until the first guide rail 81 and the second guide rail 24 are aligned. The horizontal pushing assembly 60 is used to push the detachable measuring module 10 on the positioning member onto the limiting member, and the fastening assembly 90 is used to fasten the detachable measuring module onto the limiting member.

[0054] More specifically, the specific structure of the lifting assembly 50 and its specific connection with the support 40 are as follows: The lifting assembly 50 includes a lifting drive motor 51 and a vertical screw 52. A vertical guide rod 211 is provided on the housing 21. The support 40 is slidably sleeved on the vertical guide rod 211. A vertical screw sleeve 41 is fixed on the support 40. The vertical screw 52 is rotatably mounted on the housing 21 and screwed to the vertical screw sleeve 41. The lifting drive motor 51 is fixed on the housing 21 and connected to the vertical screw 52.

[0055] The specific structure of the rotating assembly 70 and its specific connection with the positioning seat 80 are as follows: The rotating assembly 70 includes a worm 71 and a rack 72. The positioning seat 80 is rotatably mounted on the support 40. The positioning seat 80 is provided with a worm wheel 83. The worm 71 is rotatably mounted on the support 40 and meshes with the worm wheel 83. The rack 72 is fixed on the housing 21. The worm 71 is provided with a gear 711 that meshes with the rack 72.

[0056] The specific structure of the horizontal pushing assembly 60 is as follows: The horizontal pushing assembly 60 includes a longitudinal moving drive component, a longitudinal moving seat 63, a transverse moving drive component, and a crossbar 65. The longitudinal moving drive component is located inside the housing 21, and the longitudinal moving seat 63 is connected to the longitudinal moving drive component. Furthermore, the longitudinal moving drive component includes a longitudinal moving drive motor 61 and a longitudinal screw 62. A longitudinal guide rod 212 is provided on the housing 21. The longitudinal moving seat 63 is slidably sleeved on the longitudinal guide rod 212. A longitudinal threaded sleeve 631 is fixedly provided on the longitudinal moving seat 63. The longitudinal screw 62 is rotatably mounted on the housing 21 and screwed to the longitudinal threaded sleeve 631. The longitudinal moving drive motor 61 is fixedly mounted on the housing 21 and connected to the longitudinal screw 62.

[0057] A transverse drive and a crossbar 65 are mounted on a longitudinal support 63. The transverse drive is connected to the crossbar 65 and is used to drive the crossbar 65 to move laterally. The crossbar 65 can push against the housing 11. Furthermore, the transverse drive includes a transverse drive motor 64. A guide sleeve 632 is fixed on the longitudinal support 63. The crossbar 65 is slidably engaged with the guide sleeve 632. A toothed rack 651 is provided on the crossbar 65. The transverse drive motor 64 is fixed on the longitudinal support 63. A toothed disc 641 that meshes with the toothed rack 651 is provided on the output shaft of the transverse drive motor 64.

[0058] The specific structure of the fastening assembly 90 and its connection with the limiting component are as follows: The fastening assembly 90 includes a push-pull drive component 91, a bracket 92, and a second magnet block 93. The push-pull drive component 91 is fixed on the housing 21. The bracket 92 is connected to the push-pull drive component 91. The push-pull drive component 91 can be a push-pull drive electric push rod. The bracket 92 is provided with multiple columns 921. The columns 921 slide through the second guide rail 24. The second magnet block 93 is fixed at the end of the column 921. The housing 11 is provided with a second iron plate 112 that can be attracted and connected to the second magnet block 93.

[0059] The implementation principle of the colloidal osmotic pressure measuring instrument in this embodiment is as follows: When the semi-permeable membrane 14 of the separable measuring module 10 needs to be replaced, the connecting pipe 120 is separated from the cleaning liquid interface 134 and the waste liquid interface 135, and the sealing plug 19 is separated from the sample chamber 131. Then, the sliding block 32 is driven to move away from the housing 11 by the telescopic drive member 31, separating the first magnet block 100 from the first iron plate 111, and at the same time separating the electrical connector 22 from the connector 16. Then, the vertical screw 52 is driven to rotate by the lifting drive motor 51, and the vertical screw 52 drives the support 40 and the positioning seat 80 to move down into the housing 21 until the first guide rail 81 and the second guide rail 24 are at the same height. The positioning seat 80 can be set to be circular, and the housing 21 at the second guide rail 24 is provided with an arc groove 213 corresponding to the positioning seat 80.

[0060] During the downward movement of the positioning seat 80, the rack 72 drives the gear 711 and worm 71 to rotate. The worm 71 drives the worm wheel 83 and the positioning seat 80 to rotate. When the support 40 descends to the same height as the first guide rail 81 and the second guide rail 24, the positioning seat 80 rotates until the first guide rail 81 and the second guide rail 24 are aligned. Next, the transverse drive motor 64 drives the gear plate 641 to rotate. The gear plate 641 then drives the gear row 651 and the crossbar 65 to move along the guide sleeve 632, moving the crossbar 65 to one side of the housing 11. Then, the longitudinal drive motor 61 drives the longitudinal screw 62 to rotate. The longitudinal screw 62 drives the longitudinal seat 63 and the crossbar 65 to move along the longitudinal guide rod 212. The crossbar 65 pushes the detachable measuring module 10 onto the second guide rail 24. Then, the second magnet 93 is attracted to the second iron plate 112 to fix the detachable measuring module 10. When it is necessary to remove the detachable measurement module 10, open the door panel 23, and then drive the bracket 92 to move down through the push-pull drive component 91, so that the second magnet block 93 is separated from the second iron plate 112. Then, drive the crossbar 65 to move longitudinally through the longitudinal movement drive component, and push out the detachable measurement module 10.

[0061] The structure of the main unit 20 of the colloid osmotic pressure measuring instrument and the connection relationship of its components in the embodiments of this application are common knowledge in the field and need not be described in detail here. Only the casing 21 and other components are shown in the accompanying drawings.

[0062] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A detachable measurement module (10), characterized in that, include: The housing (11) is provided with a connection part for detachably connecting to the instrument host (20) of the colloidal osmotic pressure measuring instrument; The lower measuring body (12) is fixed on the housing (11); The upper measuring body (13) is connected to the lower measuring body (12) via a locking member; A semi-permeable membrane (14) is sandwiched between the lower measuring body (12) and the upper measuring body (13); Pressure sensing unit (15) is located inside housing (11). Housing (11) is provided with connector (16) electrically connected to pressure sensing unit (15). Connector (16) is used for detachable electrical connection to instrument host (20) of colloidal osmotic pressure measuring instrument.

2. A colloidal osmotic pressure measuring instrument, characterized in that, Including the detachable measurement module (10) as described in claim 1, it further includes: The instrument host (20) includes a housing (21), the housing (21) is provided with a positioning element for positioning the housing (11), and the instrument host (20) is provided with an electrical connector (22) that is detachably electrically connected to the connector (16). A fastener is provided on the housing (21) and can be detachably and fixedly connected to the connecting part of the housing (11).

3. The colloidal osmotic pressure measuring instrument according to claim 2, characterized in that, It also includes a separation mechanism (30) and a transfer mechanism provided on the housing (21). The separation mechanism (30) is used to separate the electrical connector (22) from the connector (16) and to separate the fixing member from the connection part. The transfer mechanism is used to transfer the detachable measurement module (10) into the housing (21). The housing (21) is provided with an opening for taking out the detachable measurement module (10). The opening of the housing (21) is provided with an openable and closable door panel (23).

4. The colloidal osmotic pressure measuring instrument according to claim 3, characterized in that, The separation mechanism (30) includes a telescopic drive (31) and a slide (32). The slide (32) is slidably mounted on the housing (21). The electrical connector (22) and the fixing member are fixed on the slide (32). The telescopic drive (31) is fixed on the housing (21) and connected to the slide (32). The telescopic drive (31) is used to drive the slide (32) to telescopically move relative to the housing (21).

5. A colloidal osmotic pressure measuring instrument according to claim 3, characterized in that, The transfer mechanism includes a support (40), a lifting assembly (50), a horizontal pushing assembly (60), a limiting member, and a fastening assembly (90). The lifting assembly (50) is connected to the support (40) and is used to drive the support (40) to lift. The positioning member is located on the support (40), and the limiting member is located inside the housing (21). The horizontal pushing assembly (60) is used to push the detachable measuring module (10) on the positioning member to the limiting member. The fastening assembly (90) is used to fasten the detachable measuring module to the limiting member.

6. A colloidal osmotic pressure measuring instrument according to claim 5, characterized in that, The transfer mechanism further includes a rotating component (70), and the positioning component includes a positioning seat (80). The positioning seat (80) is rotatably mounted on the support (40). The positioning seat (80) is provided with a first guide rail (81). The housing (11) can slide and engage with the first guide rail (81). The first guide rail (81) is provided with a stop (82) that can abut against the housing (11). The limiting component is a second guide rail (24) located inside the housing (21). When the lifting component (50) drives the support (40) to descend to the same height as the first guide rail (81) and the second guide rail (24), the rotating component (70) can drive the positioning seat (80) to rotate until the first guide rail (81) and the second guide rail (24) are aligned.

7. A colloidal osmotic pressure measuring instrument according to claim 6, characterized in that, The rotating assembly (70) includes a worm (71) and a rack (72). A worm wheel (83) is provided on the positioning seat (80). The worm (71) is rotatably mounted on the support (40) and meshes with the worm wheel (83). The rack (72) is fixed on the housing (21). A gear (711) meshes with the rack (72) on the worm (71).

8. A colloidal osmotic pressure measuring instrument according to claim 5, characterized in that, The horizontal pushing assembly (60) includes a longitudinal moving drive, a longitudinal moving seat (63), a transverse moving drive and a crossbar (65). The longitudinal moving drive is located inside the housing (21). The longitudinal moving seat (63) is connected to the longitudinal moving drive. The transverse moving drive and the crossbar (65) are located on the longitudinal moving seat (63). The transverse moving drive is connected to the crossbar (65) and is used to drive the crossbar (65) to move laterally. The crossbar (65) can push against the housing (11).

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