Monitor terminal

Abstract

The utility model provides a monitor terminal which is used for being installed on a cover body at the top of a liquid container and comprises a shell and a monitoring unit installed in the shell, an installation hole is formed in the middle of the cover body in a penetrating mode, and the monitor terminal is characterized in that the outer wall of a shell body is used for being matched with the installation hole and is provided with a plurality of locking blocks evenly distributed along the circumferential side; the shell body is used for being matched with a plurality of sliding grooves which are formed in the wall of the installation hole and evenly distributed along the circumferential side, a matching part is arranged on the edge of one end of the shell body along the circumferential side, and after the shell is installed on the cover body, the matching part is higher than the surface of the cover body. The monitor terminal is detachably connected with the cover body, and the mounting and dismounting modes are simple and practical.

Description

Technical Field

[0001] This application belongs to the technical field of liquid nitrogen monitoring, and particularly relates to a monitor terminal. Background Art

[0002] Liquid nitrogen has been widely used in fields such as the food industry, medicine, and animal husbandry. Liquid nitrogen is generally stored in a liquid nitrogen tank. To detect the liquid level height and temperature of liquid nitrogen in the liquid nitrogen tank in real time, a liquid level and temperature monitor terminal is installed on the cover of the top of the liquid nitrogen tank, and a detection probe is installed below it, and the detection probe extends into the liquid nitrogen.

[0003] Currently, the monitor terminal is generally fixedly installed on the cover, which results in the need to replace the cover together when replacing the monitor, and it is impossible to replace the internal components or battery of the monitor terminal alone. Therefore, a liquid level and temperature monitor terminal that can ensure sealing performance and can be easily disassembled and installed is needed. Utility Model Content

[0004] To solve the above-mentioned deficiencies of the prior art, this application provides a monitor terminal, which is detachably connected to the cover, and the installation and disassembly methods are simple and practical.

[0005] To achieve the above purpose, the present utility model adopts the following technologies:

[0006] A monitor terminal for installation on the cover of the top of a liquid container, including a housing and a monitoring unit installed in the housing. The middle of the cover is provided with an installation hole. It is characterized in that the outer wall of the main body of the housing is used to cooperate with the installation hole. A plurality of locking blocks are provided on the outer wall of the main body of the housing and are evenly distributed along the circumferential side for cooperating with a plurality of chutes evenly distributed along the circumferential side on the hole wall of the installation hole. A matching portion is provided along the circumferential side at the edge of one end of the main body of the housing. When the housing is installed on the cover, the matching portion is higher than the surface of the cover.

[0007] Further, the shape of the chute is L-shaped, its vertical part penetrates to the end of the installation hole, and an arc-shaped block protrudes from one side of the horizontal part of the chute close to the end of the installation hole to the other side; one corner of the locking block close to the matching portion is beveled for cooperating with the arc-shaped block, and the distance between the arc-shaped block and the other side of the horizontal part of the chute is less than the width of the locking block.

[0008] Further, a first sealing ring for cooperating with the cover is sleeved on the outer wall of the main body of the housing.

[0009] Further, a battery box is provided at the other end of the main body of the housing, and a cover plate is detachably connected to its opening.

[0010] Further, a second sealing ring is provided between the battery box and the cover plate.

[0011] Furthermore, the housing body includes a front end cover and a rear end cover. The monitoring unit is installed in the cavity between the front end cover and the rear end cover, and the front end cover and the rear end cover are detachably connected.

[0012] Furthermore, an installation ring with an outer diameter adapted to the aperture of the installation hole is provided on the end face of the front end cover. The locking block is arranged on the outer wall of the installation ring. An annular groove is also formed on the end face of the front end cover, which is located outside the installation ring. The first sealing ring is arranged in the annular groove, and the engaging portion is formed on the front end cover.

[0013] Furthermore, a plurality of installation posts are vertically arranged on the end face of the front end cover. Internal threads are coaxially provided in the installation posts. A plurality of countersunk holes adapted to the installation posts are provided on the end face of the rear end cover, and the countersunk holes are used to pass through screws adapted to the internal threads in the installation posts.

[0014] Furthermore, the monitoring unit includes a component board. A plurality of positioning posts are vertically arranged on the end face of the front end cover. A plurality of positioning holes adapted to the positioning posts and first fitting holes for passing through screws are formed on the component board.

[0015] Furthermore, a number of electrical connectors are provided on the component board. Second fitting holes for the electrical connectors to pass through and extend out of the housing are formed on the rear end cover. A third sealing ring is arranged between the bottom end of the electrical connector and the second fitting hole. The electrical connector is used to connect the sensor.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. It changes the traditional way of fixedly installing the monitor terminal on the lid of the liquid nitrogen tank. By using the cooperation between the installation hole and the housing body and between the sliding groove and the locking block, the detachable connection between the monitor terminal and the lid of the liquid nitrogen tank is realized, which simplifies the replacement and maintenance operations of the monitor terminal, improves the convenience of using the monitor terminal to monitor liquid nitrogen, and further simplifies the installation and disassembly process of the monitor terminal through the setting of the engaging portion;

[0018] 2. Through the cooperation between the arc-shaped block arranged on the sliding groove and one corner of the inclined surface of the locking block, the monitor terminal can be more firmly installed on the lid, improving the installation stability and reliability of the monitor terminal;

[0019] 3. Through the setting of the first sealing ring, the second sealing ring and the third sealing ring, the sealing performance between the housing and the lid, between the battery box and the cover plate, and the sealing performance of the component board are ensured, effectively eliminating the problem that the accuracy of the monitoring result of the monitor terminal is affected by poor sealing, and further improving the reliability of the monitor terminal. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the housing in the embodiment of the present application.

[0021] Figure 2 It is a schematic installation diagram between the housing and the cover in the embodiment of the present application.

[0022] Figure 3 It is a schematic structural diagram of the housing in the embodiment of the present application.

[0023] Figure 4 is Figure 3 an enlarged view of part A in

[0024] Figure 5 is Figure 3 an enlarged view of part B in

[0025] Figure 6 It is a schematic structural diagram of the battery box in the embodiment of the present application.

[0026] Figure 7 It is a schematic structural diagram of the cover plate in the embodiment of the present application.

[0027] Figure 8 It is a schematic structural diagram of the front end cover in the embodiment of the present application.

[0028] Figure 9 It is a schematic structural diagram of the component board in the embodiment of the present application.

[0029] Figure 10 It is a schematic structural diagram of the electrical connector in the embodiment of the present application.

[0030] Figure 11 It is a schematic structural diagram of the rear end cover in the embodiment of the present application.

[0031] Reference numerals: 1 - cover, 11 - mounting hole, 12 - chute, 121 - arc block, 2 - housing, 21 - locking block, 22 - mating part, 221 - mating groove, 23 - first sealing ring, 24 - battery box, 241 - cover plate, 242 - second sealing ring, 243 - connecting column, 244 - locking hole, 25 - front end cover, 251 - mounting post, 252 - positioning post, 26 - rear end cover, 261 - counterbore, 262 - second mating hole, 263 - third sealing ring, 3 - monitoring unit, 31 - component board, 311 - positioning hole, 312 - first mating hole, 313 - electrical connector. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will describe the embodiments of the present invention in detail with reference to the accompanying drawings. However, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0033] The embodiment of the present application provides a monitor terminal, such as Figure 1 and Figure 2As shown, it is used to be installed on the cover body 1 at the top of the liquid nitrogen tank. A temperature sensor and a liquid level sensor can be plugged under the monitor terminal to monitor the temperature and liquid level height of the liquid nitrogen in the liquid nitrogen tank in real time. Specifically, the monitor terminal includes: a housing 2 and a monitoring unit 3.

[0034] Among them, a mounting hole 11 with a diameter adapted to the main body of the housing 2 is provided through the middle of the cover body 1, and the outer wall of the main body of the housing 2 is used to cooperate with the mounting hole 11. In this embodiment, three locking blocks 21 evenly distributed along the circumferential side are provided on the outer wall of the main body of the housing 2 for cooperating with three chutes 12 evenly distributed along the circumferential side opened on the hole wall of the mounting hole 11. A cooperating portion 22 is provided along the circumferential side at the edge of one end of the main body of the housing 2. When the housing 2 is installed on the cover body 1, the cooperating portion 22 is higher than the surface of the cover body 1.

[0035] During application, first plug in the sensors under the monitor terminal, and then insert the main body of the housing 2 into the mounting hole 11 of the cover body 1. At this time, the sensors have extended into the liquid nitrogen tank. The cooperating portion 22 provided at the edge of one end of the main body of the housing 2 abuts against the surface of the cover body 1. Then rotate the cooperating portion 22 so that the three locking blocks 21 evenly distributed along the circumferential side provided on the outer wall of the main body of the housing 2 respectively enter the three chutes 12 evenly distributed along the circumferential side opened on the hole wall of the mounting hole 11. At this time, the installation of the monitor terminal is completed; if it is necessary to replace or maintain the monitor terminal, only need to rotate the cooperating portion 22 in the reverse direction so that the locking blocks 21 respectively withdraw from the corresponding chutes 12, and then the main body of the housing 2 can be taken out from the mounting hole 11. Through the settings of the mounting hole 11, the locking blocks 21 and the chutes 12, the detachable connection between the monitor terminal and the liquid nitrogen tank cover body 1 is realized, changing the traditional fixed installation method between the monitor terminal and the cover body 1. It not only simplifies the installation and disassembly process of the monitor terminal, but also avoids the waste of resources during the replacement and maintenance of the monitor terminal, and has high practicability.

[0036] Specifically, as Figures 3 to 5 shown, in order to improve the installation stability and reliability of the monitor terminal, a preferred solution is proposed in this embodiment, specifically as follows: the shape of the chute 12 is L-shaped, its vertical part penetrates to the end of the mounting hole 11, and an arc-shaped block 121 protrudes from one side of the horizontal part of the chute 12 close to the end of the mounting hole 11 to the other side; one corner of the locking block 21 close to the cooperating portion 22 is beveled for cooperating with the arc-shaped block 121. The distance between the arc-shaped block 121 and the other side of the horizontal part of the chute 12 is less than the width of the locking block 21. Correspondingly, the arc-shaped block 121 has a certain deformation amount to enable the locking block 21 to pass through. During application, as Figures 2 to 5As shown in the figure, the lock blocks 21 provided on the outer wall of the main body of the housing 2 are respectively pushed into the vertical parts of the corresponding sliding grooves 12, and the lock blocks 21 are located at one end of the horizontal part of the sliding grooves 12. After the main body of the housing 2 is inserted into the mounting hole 11, the mating part 22 is rotated, so that the inclined surface of one corner of the lock block 21 first contacts the arc-shaped block 121. As the mating part 22 rotates, the inclined surface of one corner of the lock block 21 abuts against the arc-shaped block 121 and moves. As the entire lock block 21 starts to enter the horizontal part of the sliding groove 12, the arc-shaped block 121 is gradually squeezed and deformed by the lock block 21 until one end of the lock block 21 abuts against the other end of the horizontal part of the sliding groove 12. At this time, the lock block 21 is locked between the other end of the horizontal part of the sliding groove 12 and the arc-shaped block 121. Due to the existence of the arc-shaped block 121, the lock block 21 will not easily come out of the horizontal part of the sliding groove 12. Through the cooperation between the arc-shaped block 121 and the inclined surface of one corner of the lock block 21, the monitor terminal can be more firmly installed on the cover body, improving the installation stability and reliability of the monitor terminal.

[0037] Both the installation and disassembly of the monitor terminal require the lock block 21 to contact the arc-shaped block 121 and deform the arc-shaped block 121. Then, a relatively high requirement is put forward for the torque required when rotating the mating part 22. Only when the torque of the mating part 22 is large enough can the arc-shaped block 121 be deformed to complete the installation and disassembly of the monitor terminal. Correspondingly, as Figure 8 shown in the figure, a mating groove 221 can be provided along the circumferential side of the housing 2 on the mating part 22. Due to the existence of the mating groove 221, the operator can use a tool with a mating block that can be inserted into the mating groove 221 to assist in rotating the mating part 22. Through the torque-increasing effect of the tool, the arc-shaped block 121 can be completely deformed, and at the same time, the installation and disassembly of the monitor terminal can be simplified.

[0038] Since the monitor terminal and the cover body 1 are detachably connected, the sealing performance between the main body of the housing 2 and the cover body 1 is particularly important. If the sealing performance between the main body of the housing 2 and the cover body 1 is poor, it will cause the liquid nitrogen tank to leak, and then the temperature monitored by the monitor terminal will deviate greatly from the actual temperature of the liquid nitrogen, affecting the monitoring accuracy of the monitor terminal. As Figure 1 and Figure 2 shown in the figure, a first sealing ring 23 that cooperates with the cover body 1 is sleeved on the outer wall of the main body of the housing 2. When the main body of the housing 2 is installed in the mounting hole 11, the first sealing ring 23 can automatically cooperate with the cover body 1 to ensure the sealing performance between the main body of the housing 2 and the cover body 1, thereby ensuring the monitoring accuracy of the monitor terminal.

[0039] Specifically, as Figures 1 to 3As shown, at the other end of the main body of the housing 2, there is a battery box 24. At its opening, there is a detachable cover plate 241. At both ends of the battery box 24, there are connecting columns 243. Inside the connecting columns 243, internal threads are coaxially provided. At both ends of the cover plate 241, there are locking holes 244 that cooperate with the connecting columns 243 for passing screws that cooperate with the internal threads in the connecting columns 243. When the battery needs to be replaced, only need to remove the monitor terminal from the cover body 1, then screw out the screws from the connecting columns 243, and remove the cover plate 241 at the opening of the battery box 24, then the battery can be replaced. This optimizes the structure of the monitor terminal, solves the problem that the battery of the monitor terminal cannot be replaced separately in the prior art, and simplifies the process of replacing the battery of the monitor terminal.

[0040] Specifically, as Figure 6 and Figure 7 shown, a second sealing ring 242 is provided between the battery box 24 and the cover plate 241. Through the setting of the second sealing ring 242, the sealing performance inside the battery box 24 is ensured, the influence of the liquid nitrogen in the liquid nitrogen tank on the battery inside the battery box 24 is avoided, and the reliability and service life of the monitor terminal are improved.

[0041] The existing monitor terminals are generally fixedly installed together with the cover body 1, which results in the inability to replace the internal components of the monitor terminal separately. To solve the above problems, a preferred solution is proposed in this embodiment, specifically as follows: As Figure 3 , Figure 6 , Figure 8 , Figure 9 , Figure 11 shown, the main body of the housing 2 includes a front end cover 25 and a rear end cover 26. The monitoring unit 3 is installed in the cavity between the front end cover 25 and the rear end cover 26. On the end face of the front end cover 25, there are four mounting posts 251 vertically distributed along the circumferential side. Internal threads are coaxially provided in the mounting posts 251. On the end face of the rear end cover 26, there are four counterbore holes 261 respectively corresponding to the mounting posts 251 one by one. The counterbore holes 261 are used for passing screws that are adapted to the internal threads in the mounting posts 251. The front end cover 25 and the rear end cover 26 are tightly connected by the cooperation of the screws and the internal threads of the mounting posts 251. When replacing the components on the monitoring unit 3, only need to screw out the screws from the mounting posts 251, then the separation of the front end cover 25 and the rear end cover 26 can be achieved, so as to replace the components on the monitoring unit 3, further optimizing the structure of the monitor terminal and solving the problem of inability to replace components separately.

[0042] Specifically, as Figure 9 , Figure 10As shown in the figure, the monitoring unit 3 includes a component board 31. Four first mating holes 312 for passing screws are provided on the component board 31. Pass the screws through the countersunk holes 261 and the first mating holes 312, and then screw them into the internal threads of the mounting posts 251. At this time, the component board 31 is locked between the front end cover 25 and the rear end cover 26. Such an installation method requires that before installing the front end cover 25, the rear end cover 26 and the component board 31 together, it is necessary to first align the four mounting posts 251 on the front end cover 25 with the four first mating holes 312 on the component board 31 respectively, and then align the four countersunk holes 261 on the rear end cover 26 with the four first mating holes 312 respectively, which makes the entire installation process very cumbersome.

[0043] To solve the above problems, the following preferred solutions can be adopted: As Figures 8 to 10 shown in the figure, four positioning posts 252 are vertically provided on the end face of the front end cover 25, and four positioning holes 311 corresponding to the positioning posts 252 are provided on the component board 31. During installation, when the four positioning holes 311 on the component board 31 are respectively passed through the corresponding positioning posts 252, the axes of the four first mating holes 312 on the component board 31 respectively coincide with the axes of the corresponding mounting posts 251 on the end face of the front end cover 25. At this time, the component board 31 is in the correct installation position and is fixed relative to the front end cover 25, which facilitates the tightening of the screws. Through the setting of the positioning posts 252 and the positioning holes 311, the installation process of the front end cover 25, the rear end cover 26 and the component board 31 is simplified, and the structure of the monitor terminal is optimized.

[0044] Specifically, as Figure 1 and Figure 8 shown in the figure, an installation ring 27 with an outer diameter adapted to the aperture of the installation hole 41 is provided on the end face of the front end cover 25. A locking block 21 is provided on the outer wall of the installation ring 27. An annular groove 28 is also provided on the end face of the front end cover 25. The annular groove 28 is located outside the installation ring 27. A first sealing ring 23 is provided in the annular groove 28, and a mating portion 22 is formed on the front end cover 25. After the main body of the housing 2 is installed, the first sealing ring 23 can automatically press against the surface of the cover body 1 to ensure the sealing performance between the housing 2 and the cover body, and further optimize the structure of the monitor terminal.

[0045] Specifically, as Figure 1 、 Figure 10 、 Figure 11As shown in the figure, two electrical connectors 313 are provided on the component board 31, and a second mating hole 262 for the electrical connectors 313 to pass through and extend out of the housing 2 is provided on the rear end cover 26. A third sealing ring 263 is provided between the bottom end of the electrical connector 313 and the second mating hole 262. The two electrical connectors 313 are respectively used to connect the temperature sensor and the liquid level sensor. Through the setting of the third sealing ring 263, the monitoring unit 3 can be separated from the space inside the liquid nitrogen tank, effectively eliminating the influence of liquid nitrogen on the devices in the monitoring unit 3, so as to ensure the service life and monitoring accuracy of the monitor terminal.

[0046] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application.

Claims

1. A monitoring terminal, used for being installed on a cover (1) on the top of a liquid container, comprising a shell (2) and a monitoring unit (3) installed in the shell (2), wherein a mounting hole (11) is provided through the middle of the cover (1), and characterized in that: The outer wall of the main body of the shell (2) is used to match the mounting hole (11); a plurality of locking blocks (21) are evenly distributed along the circumference of the outer wall of the main body of the shell (2) and are used to match with a plurality of sliding grooves (12) evenly distributed along the circumference of the hole wall of the mounting hole (11); a matching portion (22) is provided along the circumference of the edge of one end of the main body of the shell (2); when the shell (2) is mounted on the cover body (1), the matching portion (22) is higher than the surface of the cover body (1).

2. A monitoring terminal according to claim 1, characterized in that: The slide groove (12) is in an L-shape, with a vertical portion extending through the end of the mounting hole (11); a side of a horizontal portion of the slide groove (12) close to the end of the mounting hole (11) protrudes toward the other side to form an arc block (121); a corner of the locking block (21) close to the matching portion (22) is in an inclined surface for matching with the arc block (121); and a distance between the arc block (121) and the other side of the horizontal portion of the slide groove (12) is smaller than a width of the locking block (21).

3. A monitoring terminal according to claim 1, characterized in that: A first sealing ring (23) is sleeved on the outer wall of the main body of the shell (2) and is matched with the cover body (1).

4. A monitoring terminal according to claim 3, characterized in that: A battery box (24) is provided at the other end of the main body of the housing (2), and a cover plate (241) is detachably connected to the opening of the battery box.

5. A monitor terminal according to claim 4, characterized in that: A second sealing ring (242) is provided between the battery box (24) and the cover plate (241).

6. A monitoring terminal according to claim 1, characterized in that: The main body of the housing (2) comprises a front end cover (25) and a rear end cover (26); the monitoring unit (3) is installed in a cavity between the front end cover (25) and the rear end cover (26); and the front end cover (25) and the rear end cover (26) are detachably connected.

7. A monitor terminal according to claim 6, characterized in that: A mounting ring (27) having an outer diameter matching the diameter of the mounting hole (11) is provided on the end surface of the front end cover (25); a locking block (21) is provided on the outer wall of the mounting ring (27); an annular groove (28) is further provided on the end surface of the front end cover (25); the annular groove (28) is located outside the mounting ring (27); a first sealing ring (23) is provided in the annular groove (28); and a matching portion (22) is formed on the front end cover (25).

8. A monitor terminal according to claim 6, characterized in that: A plurality of mounting posts (251) are vertically arranged on the end surface of the front end cover (25), and internal threads are coaxially formed on the mounting posts (251). A plurality of countersunk holes (261) adapted to the mounting posts (251) are arranged on the end surface of the rear end cover (26), and the countersunk holes (261) are used to penetrate screws adapted to the internal threads in the mounting posts (251).

9. A monitor terminal according to claim 8, characterized in that: The monitoring unit (3) comprises an element plate (31), a plurality of positioning columns (252) are vertically arranged on the end surface of the front end cover (25), and a plurality of positioning holes (311) matching with the positioning columns (252) and a first matching hole (312) for inserting a screw are opened on the element plate (31).

10. A monitor terminal according to claim 9, characterized in that: A plurality of electrical connectors (313) are provided on the element board (31), a second matching hole (262) is provided on the rear end cover (26) for the electrical connector (313) to pass through and extend outside the housing (2), a third sealing ring (263) is provided between the bottom end of the electrical connector (313) and the second matching hole (262), and the electrical connector (313) is used to connect a sensor.

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