Multi-channel temperature acquisition device

Abstract

The utility model relates to the technical field of temperature acquisition devices, and discloses a multi-channel temperature acquisition device, which comprises a host and a plurality of expansion machines, a plurality of acquisition ports are arranged on the host and the expansion machines, an Ethernet interface and an RS485 interface are further arranged on the host, and the Ethernet interface is connected with the RS485 interface. Two surfaces between the host machine and the extension machines and between the extension machines adjacent to the host machine are connecting surfaces; the two surfaces of the connecting surface are respectively provided with a transmission port and a transmission terminal, and the connecting surface is also provided with a rotation locking assembly which is used for locking the connecting surface, thereby preventing the connection of the connecting surface from loosening. The host is provided with the transmission port and the transmission terminal which are connected with the plurality of expansion machines in sequence, the number of temperature acquisition channels is expanded, the connection surfaces are arranged at the connection positions of the host and the expansion machines and the connection positions of the expansion machines, and the connection surfaces are locked through the rotation locking assemblies on the rotation connection surfaces. Multi-channel acquisition is achieved, and meanwhile connection looseness caused by too many expansion machines is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature acquisition devices, in particular to a multi-channel temperature acquisition device. Background Art

[0002] A multi-channel temperature acquisition device is a device that can measure the temperature of multiple points at the same time. Multi-channel means that the device can collect multiple temperature data at the same time, and the temperature acquisition device refers to a device specifically used to obtain temperature data.

[0003] In specific applications, multi-channel temperature acquisition devices are often used to monitor the temperature changes of the temperature field during the production process. For example, in the fields of electronic product production and plastic processing, the temperature of multiple points needs to be monitored and controlled in real time to ensure product quality and production efficiency.

[0004] The multi-channel temperature acquisition device is usually composed of a temperature sensor, a signal processing circuit, a data acquisition module, and a computer. The temperature sensor is responsible for sensing the temperature of the object being measured, the signal processing circuit is responsible for amplifying and filtering the signal output by the sensor, and the data acquisition module is responsible for converting the processed signal into a digital signal that can be recognized by the computer. Finally, the computer processes, analyzes, and displays the data.

[0005] The host and expansion unit in the multi-channel temperature acquisition device are the two main components of the multi-channel temperature acquisition system. The host is the core part of the entire multi-channel temperature acquisition system and is responsible for managing the operation of the entire system. The host usually contains modules such as a microprocessor, memory, and input / output interface, which can realize functions such as temperature data acquisition, processing, storage, and transmission. The performance and function of the host determine the performance and function of the entire system; the expansion unit is an auxiliary device in the multi-channel temperature acquisition system, which is used to expand the number of channels and measurement points of the system. The expansion unit usually contains multiple temperature sensor interfaces and signal processing circuits, which can realize the acquisition and transmission of multiple temperature data.

[0006] By connecting to the expansion machine, the host can expand the number of temperature measurement points and improve the measurement range and accuracy of the system. In the multi-channel temperature acquisition device, the host and the expansion machine are connected by cable or wirelessly to form a complete temperature measurement system. The host is responsible for managing and controlling the operation of the entire system, while the expansion machine is responsible for expanding the number of channels and measurement points of the system, thereby realizing real-time monitoring and control of the temperature of multiple points.

[0007] However, the connection between the host and the expansion machine, and between the expansion machines in the prior art is prone to loosening, especially when the number of expansion machines reaches dozens. The unstable connection on the connection surface will cause the connection port to be disconnected or damaged. While ensuring the stability of the connection, it is also necessary to ensure the simplicity of operation and improve the efficiency of use. Utility Model Content

[0008] 1. Technical issues to be resolved

[0009] In view of the deficiencies in the prior art, the utility model provides a multi-channel temperature acquisition device, which has the advantages of stable connection surface and simple operation, and solves the problem of easy loosening of the connection between the host and the expansion machine, and between the expansion machines.

[0010] (II) Technical solution

[0011] To achieve the above object, the utility model provides the following technical solutions: a multi-channel temperature acquisition device, comprising a host for managing the operation of the entire system and a plurality of expansion machines for expanding the number of system channels, the host and the expansion machine are both provided with a plurality of acquisition ports, the acquisition ports are used to connect temperature sensors, the host is also provided with an Ethernet interface and an RS485 interface, a connection surface is provided between the host and the expansion machine, and between the expansion machine and the adjacent expansion machine, the connection surface is composed of two adjacent surfaces;

[0012] The two surfaces of the connection surface are respectively provided with a transmission port and a transmission terminal, and the transmission port and the transmission terminal are used to transmit data. The connection surface is also provided with a rotating locking component, and the rotating locking component is used to lock the host and the expansion machine, and the expansion machine and the adjacent expansion machine to prevent the connection of the connection surface from loosening.

[0013] Preferably, the host and expansion machine are also provided with a plurality of indicator lights, which are used to display the connection status of the acquisition port, Ethernet interface, RS485 interface, transmission port and transmission terminal, and the indicator lights provide reminders when the connection is loose or disconnected.

[0014] Preferably, the Ethernet interface and RS485 interface are used to connect PLC, PC and HMI for communication, ensuring the flexibility and versatility of network networking.

[0015] Preferably, the host and the expansion machine are also provided with heat dissipation openings on the sides thereof, and the heat dissipation openings are used for heat dissipation and ventilation to prevent the host and the expansion machine from malfunctioning due to excessive temperature during operation.

[0016] Preferably, in any connection surface, the rotation locking assembly includes a locking turntable and a locking seat, the locking turntable is rotatably connected to one side of the connection surface by setting a rotating shaft, a part of the locking turntable is exposed from the side of the connection surface and a convex button is provided on the exposed part, the convex button is used to rotate the locking turntable, and a plurality of locking columns protruding outward are provided on the locking turntable;

[0017] The locking seat is located on the other side of the connecting surface. The locking seat includes a plurality of locking grooves corresponding to the locking columns. Each locking column is rotated by being clamped in the corresponding locking groove to fix the two sides of the connecting surface.

[0018] Preferably, each locking column is located at an eccentric position of the locking turntable, and the locking column includes a connecting rod and a convex ring, the cross-sectional width of the convex ring is greater than that of the connecting rod, and the convex ring is connected to the locking turntable through the connecting rod;

[0019] Each locking groove includes an outer groove and an inner groove. Each outer groove is located close to the surface of the locking seat, and each inner groove is located on the inner side of the corresponding outer groove. Each locking groove is also provided with a mounting hole. The mounting hole is used to clamp the locking column into the inner groove when the connecting surface is connected. The locking column is clamped on the inner side of the outer groove by turning the convex button, thereby achieving the purpose of stable connection between the host and the expansion machine, and the expansion machine and the expansion machine.

[0020] Preferably, in any connection surface, the connection surface further comprises a plurality of four-corner positioning components and two symmetrical buckle elastic components, the four-corner positioning components are located at the edge of the connection surface, the four-corner positioning components comprise protrusions and positioning holes, each protrusion is inserted into the corresponding positioning hole to prevent the connection surfaces from moving relative to each other after connection, thereby preventing connection failure;

[0021] A buckle elastic component includes a buckle and a buckle groove. The buckle is elastic and is provided with a barb at one end for clamping in the buckle groove, thereby enhancing the stability of the connection of the connecting surface.

[0022] Preferably, each acquisition port is used to insert a plug-in spring terminal, and the acquisition port is clamped by the spring to ensure reliable connection without loosening.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the utility model provides a multi-channel temperature acquisition device, which has the following beneficial effects:

[0025] 1. The multi-channel temperature acquisition device expands the number of channels for temperature acquisition by arranging transmission ports and transmission terminals on the host to connect multiple expansion machines in sequence, and arranges connection surfaces at the connection between the host and the expansion machine, and between the expansion machines. The connection surfaces are locked by rotating the rotating locking components on the connection surfaces, thereby realizing multi-channel acquisition while avoiding loose connections due to too many expansion machines.

[0026] 2. The multi-channel temperature acquisition device is connected by setting a locking turntable and a locking seat. A convex button and a locking column are set on the locking turntable. When the convex button drives the locking turntable to rotate, the locking column is stuck in the inner groove inside the outer groove, thereby locking the locking turntable and the locking seat. The connection surface can be quickly connected and separated by rotating the convex button. Since the locking column is stuck in the inner groove by rotating around the rotating shaft, the connection surface will not loosen the connection of the rotating locking assembly when subjected to tension in any direction.

[0027] 3. The multi-channel temperature acquisition device is provided with four-corner positioning components and a buckle elastic component on the connection surface. The four-corner positioning components prevent the connection surfaces from moving relative to each other after connection and causing connection failure by clamping the protrusions into the corresponding positioning holes. The buckle elastic component strengthens the stability of the connection of the connection surface by clamping the elastic buckle in the buckle groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a multi-channel temperature acquisition device host and multiple expansion devices connected together.

[0029] Figure 2 It is a structural schematic diagram of one side of the host of the multi-channel temperature acquisition device of the utility model.

[0030] Figure 3 This is a structural diagram of the other side of the main unit of the multi-channel temperature acquisition device of the utility model.

[0031] Figure 4 This is a structural schematic diagram of one side of the expansion machine of the multi-channel temperature acquisition device of the utility model.

[0032] Figure 5 This is a structural schematic diagram of the other side of the expansion machine of the multi-channel temperature acquisition device of the utility model.

[0033] Figure 6 It is a structural schematic diagram of the locking turntable of the multi-channel temperature acquisition device of the utility model.

[0034] Figure 7 It is a partial enlarged structural schematic diagram of the locking seat of the multi-channel temperature acquisition device of the utility model.

[0035] Figure 8 It is a structural schematic diagram of the connection surface of the multi-channel temperature acquisition device of the utility model.

[0036] In the figure: 1. host; 11. Ethernet interface; 12. RS485 interface; 2. expansion machine; 31. acquisition port; 32. indicator light; 33. heat dissipation port; 34. transmission port; 35. transmission terminal; 4. connection surface; 41. rotation locking assembly; 42. four-corner positioning assembly; 43. buckle elastic assembly; 411. locking turntable; 412. locking seat; 421. convex block; 422. positioning hole; 431. buckle; 432. buckle groove; 4111. shaft; 4112. convex button; 4113. locking column; 4114. connecting rod; 4115. convex ring; 4120. locking groove; 4121. outer groove; 4122. inner groove; 4123. mounting hole. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, 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 utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Embodiment 1:

[0041] This embodiment provides a multi-channel temperature acquisition device having the following technical features.

[0042] See also Figure 1-8A multi-channel temperature acquisition device includes a host 1 for managing the operation of the entire system and multiple expansion machines 2 for expanding the number of system channels. The host 1 and the expansion machine 2 are both provided with multiple acquisition ports 31, and the acquisition port 31 is used to connect the temperature sensor. The host 1 is also provided with an Ethernet interface 11 and an RS485 interface 12. A connection surface 4 is provided between the host 1 and the expansion machine 2, and between the expansion machine 2 and the adjacent expansion machine 2, and the connection surface 4 is composed of two adjacent surfaces.

[0043] Further settings, such as Figure 8 As shown, the two surfaces of the connection surface 4 are respectively provided with a transmission port 34 and a transmission terminal 35, and the transmission port 34 and the transmission terminal 35 are used to transmit data. The connection surface 4 is also provided with a rotating locking component 41, and the rotating locking component 41 is used to lock the host 1 and the expansion machine 2, and the expansion machine 2 and the adjacent expansion machine 2 to prevent the connection of the connection surface 4 from loosening.

[0044] Through the above technical solution, by setting a transmission port 34 and a transmission terminal 35 on the host 1 to connect multiple expansion machines 2 in sequence, the number of channels for temperature collection is expanded, and a connecting surface 4 is set at the connection between the host 1 and the expansion machine 2, and the expansion machine 2 and the expansion machine 2. The connecting surface 4 is locked by rotating the rotating locking component 41 on the connecting surface 4, so as to realize multi-channel collection while avoiding loose connection due to too many expansion machines 2.

[0045] Embodiment 2:

[0046] This embodiment provides a multi-channel temperature acquisition device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] As an example, Figure 2-5 As shown, the host 1 and the expansion machine 2 are also provided with a plurality of indicator lights 32, which are used to display the connection status of the acquisition port 31, the Ethernet interface 11, the RS485 interface 12, the transmission port 34 and the transmission terminal 35. The indicator lights 32 provide a reminder when the connection is loose or disconnected.

[0048] Further settings, such as Figure 2 As shown, the Ethernet interface 11 and the RS485 interface 12 are used to connect PLC, PC and HMI for communication, ensuring the flexibility and versatility of network networking.

[0049] Further settings, such as Figure 2 and 4 As shown, heat dissipation vents 33 are also provided on the sides of the host 1 and the expansion machine 2. The heat dissipation vents 33 are used for heat dissipation and ventilation to prevent the host 1 and the expansion machine 2 from malfunctioning due to excessive temperature during operation.

[0050] It is further provided that each acquisition port 31 is used to insert a plug-in spring terminal, and the acquisition port 31 is clamped by a spring to ensure reliable connection without loosening.

[0051] Embodiment three:

[0052] This embodiment provides a multi-channel temperature acquisition device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] As an example, Figure 6 As shown, in any connecting surface 4, the rotating locking assembly 41 includes a locking turntable 411 and a locking seat 412. The locking turntable 411 is rotatably connected to one side of the connecting surface 4 by setting a rotating shaft 4111. A portion of the locking turntable 411 is exposed from the side of the connecting surface 4 and a convex button 4112 is provided on the exposed portion. The convex button 4112 is used to rotate the locking turntable 411. The locking turntable 411 is provided with a plurality of locking columns 4113 protruding outward.

[0054] Further settings, such as Figure 7 As shown, the locking seat 412 is located on the other side of the connecting surface 4 , and the locking seat 412 includes a plurality of locking grooves 4120 corresponding to the locking columns 4113 . Each locking column 4113 is rotated by being stuck in the corresponding locking groove 4120 to fix the two sides of the connecting surface 4 .

[0055] Further settings, such as Figure 6 As shown, each locking column 4113 is located at an eccentric position of the locking turntable 411 , and the locking column 4113 includes a connecting rod 4114 and a convex ring 4115 , the cross-sectional width of the convex ring 4115 is greater than that of the connecting rod 4114 , and the convex ring 4115 is connected to the locking turntable 411 through the connecting rod 4114 .

[0056] Further settings, such as Figure 7 As shown, each locking groove 4120 includes an outer groove 4121 and an inner groove 4122. Each outer groove 4121 is located close to the surface of the locking seat 412, and each inner groove 4122 is located at the inner side of the corresponding outer groove 4121. Each locking groove 4120 is also provided with a mounting hole 4123. The mounting hole 4123 is used to clamp the locking column 4113 into the inner groove 4122 when the connecting surface 4 is connected. The locking column 4113 is clamped on the inner side of the outer groove 4121 by rotating the convex button 4112, thereby achieving the purpose of stably connecting the host 1 and the expansion machine 2, and the expansion machine 2 and the expansion machine 2.

[0057] Through the above technical solution, a locking turntable 411 and a locking seat 412 are connected, and a convex button 4112 and a locking column 4113 are provided on the locking turntable 411. When the convex button 4112 drives the locking turntable 411 to rotate, the locking column 4113 is stuck in the inner groove 4122 on the inner side of the outer groove 4121, thereby locking the locking turntable 411 and the locking seat 412. By rotating the convex button 4112, the connection surface 4 can be quickly connected and separated.

[0058] Embodiment 4:

[0059] This embodiment provides a multi-channel temperature acquisition device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] As an example, Figure 8 As shown, in any connection surface 4, the connection surface 4 further includes a plurality of four-corner positioning components 42 and two symmetrical buckle elastic components 43. The four-corner positioning components 42 are located at the edge of the connection surface 4. The four-corner positioning components 42 include protrusions 421 and positioning holes 422. Each protrusion 421 is inserted into a corresponding positioning hole 422 to prevent the connection surface 4 from moving relative to each other after connection, thereby preventing connection failure;

[0061] Further settings, such as Figure 8 As shown, a buckle elastic component 43 includes a buckle 431 and a buckle groove 432 . The buckle 431 is elastic and has a barb at one end for clamping in the buckle groove 432 , thereby enhancing the stability of the connection of the connecting surface 4 .

[0062] Through the above technical solution, by setting four-corner positioning components 42 and snap-on elastic components 43 on the connecting surface 4, the four-corner positioning components 42 prevent the connecting surface 4 from moving relative to each other after connection and causing connection failure by snapping the protrusion 421 into the corresponding positioning hole 422, and the snap-on elastic component 43 strengthens the stability of the connection of the connecting surface 4 by clamping the elastic snap 431 in the snap groove 432.

[0063] Working principle: When connecting the host 1 and the expansion machine 2, and the expansion machine 2 and the expansion machine 2, insert the transmission terminal 35 into the corresponding transmission port 34. At the same time, the locking column 4113 is aligned with the corresponding mounting hole 4123. At this time, rotate the convex button 4112 to make the connecting rod 4114 at the end of the locking column 4113 be stuck in the inner groove 4122 on the inner side of the outer groove 4121. Since the locking column 4113 is stuck in the inner groove 4122 by rotating around the rotating shaft 4111, the connection of the rotating locking assembly 41 will not loosen when the connecting surface 4 is subjected to tension in any direction.

[0064] In summary, the multi-channel temperature acquisition device expands the number of channels for temperature acquisition by setting a transmission port 34 and a transmission terminal 35 on the host 1 to connect multiple expansion machines 2 in sequence, and sets a connection surface 4 at the connection between the host 1 and the expansion machine 2, and the expansion machine 2 and the expansion machine 2. The connection surface 4 is locked by rotating the rotating locking component 41 on the connection surface 4, so as to realize multi-channel acquisition while avoiding loose connection due to too many expansion machines 2.

[0065] The multi-channel temperature acquisition device is connected by setting a locking turntable 411 and a locking seat 412. A convex button 4112 and a locking column 4113 are set on the locking turntable 411. When the convex button 4112 drives the locking turntable 411 to rotate, the locking column 4113 is stuck in the inner groove 4122 on the inner side of the outer groove 4121, thereby locking the locking turntable 411 and the locking seat 412. The connection surface 4 can be quickly connected and separated by rotating the convex button 4112. Since the locking column 4113 is stuck in the inner groove 4122 by rotating around the rotating shaft 4111, the connection of the rotating locking assembly 41 will not loosen when the connection surface 4 is subjected to tension in any direction.

[0066] The multi-channel temperature acquisition device is provided with four-corner positioning components 42 and a buckle elastic component 43 on the connection surface 4. The four-corner positioning components 42 prevent the connection surface 4 from moving relative to each other after connection and causing connection failure by clamping the protrusions 421 into the corresponding positioning holes 422. The buckle elastic component 43 strengthens the stability of the connection of the connection surface 4 by clamping the elastic buckle 431 into the buckle groove 432.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0068] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-channel temperature acquisition device, comprising a host (1) for managing the operation of the entire system and a plurality of expansion machines (2) for expanding the number of system channels, wherein the host (1) and the expansion machine (2) are both provided with a plurality of acquisition ports (31), and the acquisition ports (31) are used to connect temperature sensors, characterized in that: The host (1) is also provided with an Ethernet interface (11) and an RS485 interface (12); the connection points between the host (1) and the expansion machine (2), and between the expansion machines (2) and the expansion machines (2) are connection surfaces (4); and the connection surfaces (4) are composed of two adjacent surfaces; The two surfaces of the connection surface (4) are respectively provided with a transmission port (34) and a transmission terminal (35), the transmission port (34) and the transmission terminal (35) are used for transmitting data, and the connection surface (4) is also provided with a rotation locking component (41), the rotation locking component (41) is used for locking the host (1) and the expansion machine (2), and the expansion machine (2) and the expansion machine (2) when connected, so as to prevent the connection of the connection surface (4) from being loosened.

2. A multi-channel temperature acquisition device according to claim 1, characterized in that: The host (1) and the expansion machine (2) are also provided with a plurality of indicator lights (32), the indicator lights (32) are used to display the connection status of the acquisition port (31), the Ethernet interface (11), the RS485 interface (12), the transmission port (34) and the transmission terminal (35), and the indicator lights (32) are used to remind when the connection is loose or disconnected.

3. A multi-channel temperature acquisition device according to claim 1, characterized in that: The Ethernet interface (11) and the RS485 interface (12) are used to connect the PLC, PC and HMI for communication, thereby ensuring the flexibility and versatility of network networking.

4. A multi-channel temperature acquisition device according to claim 1, characterized in that: The sides of the host (1) and the expansion machine (2) are also provided with heat dissipation openings (33), and the heat dissipation openings (33) are used for heat dissipation and ventilation to prevent the host (1) and the expansion machine (2) from malfunctioning due to excessive temperatures during operation.

5. A multi-channel temperature acquisition device according to claim 1, characterized in that: In any connecting surface (4), the rotating locking assembly (41) comprises a locking rotating disk (411) and a locking seat (412); the locking rotating disk (411) is rotatably connected to one side of the connecting surface (4) by means of a rotating shaft (4111); a portion of the locking rotating disk (411) is exposed from a side of the connecting surface (4) and a convex button (4112) is provided on the exposed portion; the convex button (4112) is used to rotate the locking rotating disk (411); and a plurality of locking columns (4113) protruding outward are provided on the locking rotating disk (411); The locking seat (412) is located on the other side of the connecting surface (4), and the locking seat (412) includes a plurality of locking grooves (4120) corresponding to the locking columns (4113). Each locking column (4113) is rotated by being clamped in the corresponding locking groove (4120) to fix the two sides of the connecting surface (4).

6. A multi-channel temperature acquisition device according to claim 5, characterized in that: Each locking column (4113) is located at an eccentric position of the locking rotating disk (411), and the locking column (4113) includes a connecting rod (4114) and a convex ring (4115), the cross-sectional width of the convex ring (4115) is greater than that of the connecting rod (4114), and the convex ring (4115) is connected to the locking rotating disk (411) through the connecting rod (4114); Each locking groove (4120) comprises an outer groove (4121) and an inner groove (4122), each outer groove (4121) is located near the surface of the locking seat (412), and each inner groove (4122) is located at the inner side of the corresponding outer groove (4121). Each locking groove (4120) is also provided with a mounting hole (4123), and the mounting hole (4123) is used to insert the locking column (4113) into the inner groove (4122) when the connecting surface (4) is connected. By rotating the convex button (4112), the locking column (4113) is stuck in the inner side of the outer groove (4121), so as to achieve the purpose of stably connecting the host (1) and the expansion machine (2), and the expansion machine (2) and the expansion machine (2).

7. A multi-channel temperature acquisition device according to claim 1, characterized in that: In any connection surface (4), the connection surface (4) further comprises a plurality of four-corner positioning components (42) and two symmetrical snap-on elastic components (43), the four-corner positioning components (42) being located at the edge of the connection surface (4), the four-corner positioning components (42) comprising a protrusion (421) and a positioning hole (422), each protrusion (421) being snapped into a corresponding positioning hole (422) to prevent the connection surfaces (4) from moving relative to each other after connection, thereby preventing connection failure; A buckle elastic component (43) includes a buckle (431) and a buckle groove (432); the buckle (431) is elastic and is provided with a barb at one end for clamping in the buckle groove (432), thereby enhancing the stability of the connection of the connection surface (4).

8. A multi-channel temperature acquisition device according to claim 1, characterized in that: Each collection port (31) is used to insert a straight-insertion spring terminal, and the collection port (31) is clamped by a spring so that the connection is reliable and not loose.

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