A digital temperature transmitter

Abstract

The present invention discloses a digital temperature transmitter, including a meter head, a rod body, a temperature measuring unit and a flow measuring unit, and also includes: a first movable groove, which is provided with two in the axial direction in the rod body, and is respectively connected to the temperature measuring unit and the flow measuring unit, and the upper ends of the temperature measuring unit and the flow measuring unit are electrically connected to the meter head through spiral wires; a linkage component, which is used to link the temperature measuring unit and the flow measuring unit, and make the temperature measuring unit and the flow measuring unit move up and down; a driving component, which is used to drive the linkage component to switch the temperature measuring unit and the flow measuring unit. The present invention controls the movement of the linkage component through the driving component, so that the temperature measuring unit and the flow measuring unit are driven to switch the high and low positions, so that a set of data can be obtained on the meter head, thereby obtaining two sets of data, one high and one low, through the detection of the temperature measuring unit and the flow measuring unit, so that the condition of the detected medium can be accurately evaluated and the stability of the transmitter can be tested.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, and in particular to a digital temperature transmitter. Background Art

[0002] Temperature transmitter is a device that converts physical measurement signals or ordinary electrical signals into standard electrical signals or outputs them in the form of communication protocols. It is mainly used for measuring and controlling temperature parameters in industrial processes. Temperature transmitters use thermocouples and thermal resistors as temperature measuring elements. The output signal from the temperature measuring element is sent to the transmitter module. After voltage stabilization and filtering, operational amplification, nonlinear correction, V / I conversion, constant current and reverse protection circuit processing, it is converted into a current signal, voltage signal or digital signal output that is linearly related to temperature. Existing temperature transmitters can also integrate wireless transmission devices, which are more intelligent.

[0003] Patent document CN204988521U disclosed a digital temperature transmitter on January 20, 2016, which relates to the field of sensor technology and mainly includes a temperature probe, a mounting joint and a meter head. A support rod is provided between the mounting joint and the meter head. A shoulder is provided at one end of the support rod near the mounting joint. A pressure cap is sleeved between the shoulder and the meter head. The pressure cap is connected to the mounting joint through threads. A spring is provided between the mounting joint and the support rod. A buzzer, an alarm light and an incoming line connector are provided on the meter head. A control module and a digital display module are provided inside the meter head. The buzzer, the alarm light, the digital display module and the temperature probe are all electrically connected to the control module. The beneficial effect is that a spring damping structure is added between the mounting joint and the support rod, which effectively buffers vibration and avoids the influence of vibration on the temperature transmitter. The utility model adopts an acoustic and visual alarm system combining a buzzer and an alarm light. Through this system, the staff can find temperature anomalies in time, make proper treatment in time, and reduce the loss to a minimum.

[0004] In the prior art such as the above-mentioned patent, after the transmitter is connected to the pipe body for medium transportation, the detection end is inserted into the pipe body and maintained at a fixed height. When the diameter of the pipe body is large, there may be differences in the upper and lower layers of the medium flowing in the pipe body, making it impossible to accurately evaluate the actual detection situation. Therefore, a digital temperature transmitter is urgently needed to solve the above problem. Summary of the invention

[0005] The object of the present invention is to provide a digital temperature transmitter to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A digital temperature transmitter comprises a meter head, a rod body, a temperature measuring unit and a flow measuring unit, and also comprises: a first movable groove, which is provided with two in the axial direction in the rod body, and respectively movably connects the temperature measuring unit and the flow measuring unit, and the upper ends of the temperature measuring unit and the flow measuring unit are electrically connected to the meter head through a spiral wire; a linkage component, which is used to link the temperature measuring unit and the flow measuring unit, and make the temperature measuring unit and the flow measuring unit move up and down; a driving component, which is used to drive the linkage component to switch the temperature measuring unit and the flow measuring unit to a high or low position.

[0008] Preferably, the linkage assembly includes synchronizers provided on both the temperature measuring unit and the flow measuring unit, a linkage gear rotatably provided in the rod body is provided between the two synchronizers, and a linkage rack meshing with the linkage gear is provided on the synchronizer.

[0009] Preferably, the synchronizing part includes a splicing part and a bending part, the temperature measuring unit and the flow measuring unit are provided with a splicing groove matching the splicing part, the bending part extends from the side of the temperature measuring unit or the flow measuring unit and is used to connect the linkage rack, and a second movable groove matching the bending part is provided in the rod body.

[0010] Preferably, the driving assembly comprises a power compartment arranged on the side wall of the rod body, a driving unit is installed in the power compartment, and an output end of the driving unit is transmission-connected to a transmission shaft coaxially and fixedly connected to the linkage gear.

[0011] Preferably, a synchronous block which is arranged in the rod body and has limited rotation is sleeved on the transmission shaft via a coil spring.

[0012] Preferably, the linkage gear is movably arranged in the rod body so as to be lifted and lowered, a movable chamber matching the synchronous block is arranged on the side wall of the rod body, and an elastic member which hinders the movement of the synchronous block is arranged in the movable chamber.

[0013] Preferably, the output end of the driving unit is connected to a first bevel gear via a clutch assembly, and a second bevel gear meshing with the first bevel gear is coaxially connected to the transmission shaft.

[0014] Preferably, the clutch assembly comprises a first gear coaxially connected to the output end of the driving unit, and the first bevel gear is coaxially connected to a second gear matching the first gear.

[0015] Preferably, a casing is movably provided outside the rod body, the first bevel gear and the second bevel gear are arranged inside the casing, and the transmission shaft rotates through the casing and drives the casing to move synchronously.

[0016] Preferably, a power supply electrically connected to the drive unit is provided in the power compartment, and a first switch for controlling the on and off of the power supply and a second switch for starting and stopping the drive unit are provided on the outside of the power compartment.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] The digital temperature transmitter sets a linkage component to make the temperature measuring unit and the flow measuring unit move in an ascending and descending manner. During the field inspection, the inspector first records a set of temperature and flow data displayed on the meter head. Then, the inspector controls the movement of the linkage component through the driving component to drive the temperature measuring unit and the flow measuring unit to switch the high and low positions, thereby obtaining another set of data on the meter head. By obtaining two sets of data, one high and one low, through the detection of the temperature measuring unit and the flow measuring unit, the condition of the medium being tested can be accurately evaluated and the stability of the test transmitter can be tested.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall front structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the overall back structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a front cross-sectional structure provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of a rear cross-sectional structure provided by an embodiment of the present invention;

[0026] Figure 5 The embodiment of the present invention provides Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 6 A schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention;

[0028] Figure 7 The embodiment of the present invention provides Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 8 A schematic diagram of a cross-sectional structure of an embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of the structure of a linkage component provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Meter head; 2. Rod body; 3. Temperature measuring unit; 4. Flow measuring unit; 5. First movable slot; 6. Spiral wire; 7. Synchronous member; 701. Splicing part; 702. Bending part; 8. Linkage gear; 9. Linkage rack; 10. Splicing slot; 11. Second movable slot; 12. Power compartment; 13. Drive unit; 14. Transmission shaft; 15. Coil spring; 16. Synchronous block; 17. Movable compartment; 18. Elastic member; 19. First bevel gear; 20. Second bevel gear; 21. First gear wheel; 22. Second gear wheel; 23. Enclosure; 24. Power supply; 25. First switch; 26. Second switch; 27. Third movable slot. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0034] See also Figure 1-9 A digital temperature transmitter provided by an embodiment of the present invention includes a meter head 1, a rod body 2, a temperature measuring unit 3 and a flow measuring unit 4, and also includes: a first movable groove 5, which is axially arranged with two in the rod body 2, and is respectively movably connected to the temperature measuring unit 3 and the flow measuring unit 4, and the upper ends of the temperature measuring unit 3 and the flow measuring unit 4 are electrically connected to the meter head 1 through a spiral wire 6; a linkage component, which is used to link the temperature measuring unit 3 and the flow measuring unit 4, and make the temperature measuring unit 3 and the flow measuring unit 4 move one up and one down; a driving component, which is used to drive the linkage component to switch the temperature measuring unit 3 and the flow measuring unit 4 to a high and low position.

[0035] Specifically, a data processing unit is integrated in the meter head 1, and the data processing unit converts the physical signal collected by the detection end into a digital signal. A display screen is provided on the meter head 1, and the display screen displays the detected data; the rod body 2 is fixedly connected to the meter head 1, and a connecting structure for connecting a detection tube body is provided at one end of the rod body 2 away from the meter head 1, and the connecting structure can be a threaded type or a flange type, etc.; the rod body 2 provides protection for the internal structure; the temperature measuring unit 3 and the flow measuring unit 4 are both rod-shaped; the ends of the temperature measuring unit 3 and the flow measuring unit 4 away from the meter head 1 are both set as detection ends, and both can extend out of the rod body 2. The first movable groove 5 extends axially along the rod body 2 to the end of the rod body 2 away from the meter head 1; the two first movable grooves 5 are arranged in parallel; the spiral wire 6 is convenient for extending or shortening to adapt to the activity of the temperature measuring unit 3 or the flow measuring unit 4, and the spiral wire 6 does not produce sufficient tension force on the temperature measuring unit 3 or the flow measuring unit 4 to move it; the setting of the linkage component makes the activities of the temperature measuring unit 3 and the flow measuring unit 4 synchronized and in opposite directions; the driving component is used to actively drive the linkage component to move, thereby driving the temperature measuring unit 3 and the flow measuring unit 4 to switch the height of the activity. In actual use of the present technical solution, during the field inspection process, the temperature measuring unit 3 and the flow measuring unit 4, one of the extended rod body 2 is at the lowest position in the detection tube body, and the other is at the highest position in the detection tube body. At this time, the inspector can first record a set of temperature and flow data displayed on the meter header 1, and then the inspector controls the movement of the linkage component through the driving component to drive the temperature measuring unit 3 and the flow measuring unit 4 to switch the high and low positions, so that another set of data can be obtained on the meter header 1. By obtaining two sets of data, one high and one low, through the detection of the temperature measuring unit 3 and the flow measuring unit 4, the condition of the medium being detected can be accurately evaluated and the stability of the transmitter can be tested.

[0036] Compared with the prior art, a digital temperature transmitter proposed in an embodiment of the present invention sets a linkage component so that the temperature measuring unit 3 and the flow measuring unit 4 are linked to perform an ascending and descending movement. Then, during the field inspection, the inspector first records a set of temperature and flow data displayed on the meter header 1, and then the inspector controls the movement of the linkage component through the driving component to drive the temperature measuring unit 3 and the flow measuring unit 4 to switch the high and low positions, so that another set of data can be obtained on the meter header 1. Therefore, two sets of data, one high and one low, are obtained by detecting the temperature measuring unit 3 and the flow measuring unit 4, so as to accurately evaluate the condition of the medium being detected and to inspect the stability of the transmitter.

[0037] As a preferred technical solution of this embodiment, the linkage assembly includes a synchronous member 7 provided on both the temperature measuring unit 3 and the flow measuring unit 4, a linkage gear 8 rotatably provided in the rod body 2 is provided between the two synchronous members 7, and a linkage rack 9 meshing with the linkage gear 8 is provided on the synchronous member 7. Specifically, the synchronous member 7 includes a splicing portion 701 and a bending portion 702, and a splicing groove 10 matching the splicing portion 701 is provided on the temperature measuring unit 3 and the flow measuring unit 4. The bending portion 702 extends from the side of the temperature measuring unit 3 or the flow measuring unit 4 and is used to connect the linkage rack 9, and a second movable groove 11 matching the bending portion 702 is provided in the rod body 2; the splicing groove 10 is provided on the relative outer sides of the temperature measuring unit 3 and the flow measuring unit 4 On the other side, the splicing portion 701 of the synchronization member 7 is just engaged in the splicing groove 10 to smoothly transition with the outer wall of the temperature measuring unit 3 or the flow measuring unit 4; the bending portion 702 extends from the same side of the temperature measuring unit 3 or the flow measuring unit 4, and the bending directions of the two bending portions 702 are close to each other, and a linkage rack 9 is set near the measurement, and the linkage gear 8 is set between the two linkage racks 9, so that the moving directions of the linkage racks 9 on both sides are opposite; the second movable groove 11 is connected to the first movable groove 5; the setting of the splicing portion 701 and the splicing groove 10 makes the structure of the temperature measuring unit 3 or the flow measuring unit 4 simple, and its driven part can be separated separately, thereby facilitating the subsequent replacement of the temperature measuring unit 3 or the flow measuring unit 4 when it is damaged.

[0038] As a preferred technical solution of this embodiment, the driving assembly includes a power compartment 12 arranged on the side wall of the rod body 2, and a driving unit 13 is installed in the power compartment 12. The output end of the driving unit 13 is connected to a transmission shaft 14 coaxially fixedly connected to the linkage gear 8. Specifically, the driving unit 13 can be preferably a small motor, and has a power-off decoupling function, that is, the output end of the driving unit 13 outputs a rotational motion when the power is on, but when the power is off, the output end rotates freely; the transmission shaft 14 is movably arranged through the side wall of the rod body 2. In actual use, when the driving unit 13 is powered on, the power is transmitted to the transmission shaft 14, so that the transmission shaft 14 drives the linkage gear 8 to rotate actively, and the linkage gear 8 links the linkage racks 9 on both sides, thereby changing the high and low positions of the temperature measuring unit 3 or the flow measuring unit 4.

[0039] As the preferred technical solution of this embodiment, a synchronization block 16 which is arranged in the rod body 2 and has limited rotation is sleeved on the transmission shaft 14 through a coil spring 15. Specifically, the synchronization block 16 is limited in rotation in the rod body 2, and then the rotation of the transmission shaft 14 is hindered by the coil spring 15, that is, the rotation of the linkage gear 8 is hindered. Under the elastic force of the coil spring 15, the free movement of the linkage racks 9 on both sides is restricted through the transmission shaft 14 and the linkage gear 8. At this time, the linkage racks 9 on both sides are respectively at the highest end and the lowest end of the lifting stroke, that is, the temperature measuring unit 3 and the flow measuring unit 4 are correspondingly arranged at a high and a low position.

[0040] When there is a possibility of explosion of the medium in the detection tube, the detection end of the transmitter extending into the tube may be pushed or squeezed by the explosion, and thus easily damaged. To solve this problem, the following embodiments are proposed.

[0041] In another embodiment of the present invention, the linkage gear 8 can be raised and lowered in the rod body 2, and the side wall of the rod body 2 is provided with an active warehouse 17 matching the synchronization block 16, and the active warehouse 17 is provided with an elastic member 18 that hinders the movement of the synchronization block 16. Specifically, a third active groove 27 for the linkage gear 8 to move is provided in the rod body 2, and the movement direction of the linkage gear 8 is parallel to the axial direction of the rod body 2; the synchronization block 16 is raised and lowered in the active warehouse 17; the elastic member 18 can preferably be a spring, and the elastic member 18 is provided at the upper end of the synchronization block 16 to hinder the synchronization block 16 from moving upward, that is, the synchronization block 16 is at the lowest end of the active warehouse 17 under the condition of not being subject to external force. In actual use of the present technical solution, when the medium in the detection tube body explodes, the volume of the medium in the tube body expands, thereby compressing the temperature measuring unit 3 and the flow measuring unit 4, causing the temperature measuring unit 3 and the flow measuring unit 4 to shrink into the first movable groove 5, so that the two linkage racks 9 simultaneously apply an upward thrust to the linkage gear 8, causing the linkage gear 8 to move upward, and the linkage gear 8 drives the synchronization block 16 to move upward in the movable bin 17 through the transmission shaft 14, and the synchronization block 16 squeezes the elastic member 18, and the elastic member 18 compresses and stores elastic potential energy to buffer the synchronization block 16, that is, to buffer the temperature measuring unit 3 and the flow measuring unit 4, thereby greatly reducing the possibility of damage to the temperature measuring unit 3 and the flow measuring unit 4.

[0042] As the preferred technical solution of this embodiment, the output end of the driving unit 13 is connected to the first bevel gear 19 through the clutch assembly, and the transmission shaft 14 is coaxially connected to the second bevel gear 20 meshing with the first bevel gear 19. Specifically, the output end of the driving unit 13 is axially arranged vertically; the output end of the driving unit 13 drives the first bevel gear 19 to rotate, the first bevel gear 19 meshes with the second bevel gear 20, and the second bevel gear 20 rotates through the transmission shaft 14. The linkage gear 8 drives the linkage racks 9 on both sides to move, and then the temperature measuring unit 3 and the flow measuring unit 4 move synchronously one up and one down.

[0043] As a preferred technical solution of this embodiment, the clutch assembly includes a first gear 21 coaxially connected to the output end of the drive unit 13, and the first bevel gear 19 is coaxially connected to a second gear 22 matching the first gear 21. Specifically, when the first gear 21 is engaged with the second gear 22, the output end of the drive unit 13 drives the first bevel gear 19 to rotate synchronously; the upper end of the power compartment 12 is provided with a ring sleeve mounted on the outside of the first gear 21 to assist the first gear 21 in docking with the second gear 22. In actual use of the present technical solution, when the height of the temperature measuring unit 3 and the flow measuring unit 4 can be switched, the driving unit 13 is started, driving the first gear 21 to rotate. At this time, the first gear 21 and the second gear 22 remain engaged, and the second gear 22 rotates synchronously with the first gear 21, and the first bevel gear 19 also rotates, and then transmits the second bevel gear 20, the transmission shaft 14 and the linkage gear 8. At this time, the linkage gear 8 drives the linkage racks 9 on both sides to move, and then the temperature measuring unit 3 and the flow measuring unit 4 move synchronously, one rising and one falling. When the height of the temperature measuring unit 3 and the flow measuring unit 4 is switched, if the driving unit 13 cannot be powered off in time, the second gear 22 stops rotating. The first gear 21 is moved, and the second gear 22 is squeezed to move the teeth in an offset manner. At the same time, the second gear 22 rises relative to the first gear 21, thereby driving the first bevel gear 19 to rise. The first bevel gear 19 pushes the second bevel gear 20 and the transmission shaft 14 to rise. The transmission shaft 14 drives the synchronous block 16 to rise in the movable bin 17 to resist the elastic member 18. Subsequently, every time the first gear 21 and the second gear 22 are offset and moved by one tooth, the elastic member 18 pushes the synchronous block 16 down again, and then transmits the transmission to push the second gear 22 to descend to re-engage with the first gear 21, thereby avoiding the drive unit 13 from getting stuck and preventing the drive unit 13 from being damaged.

[0044] As a preferred technical solution of this embodiment, a shell 23 is movably provided on the outer side of the rod body 2, and the first bevel gear 19 and the second bevel gear 20 are arranged in the shell 23. The transmission shaft 14 rotates through the shell 23 and drives the shell 23 to move synchronously. Specifically, the shell 23 is arranged on the upper side of the power bin 12, and the shell 23 is close to the rod body 2 for lifting and lowering activities; the shell 23 limits the first bevel gear 19 and the second bevel gear 20 internally to keep them in a meshing state and can move synchronously.

[0045] As a preferred technical solution of the present embodiment, a power supply 24 electrically connected to the drive unit 13 is provided in the power compartment 12, and a first switch 25 for controlling the on and off of the power supply 24 and a second switch 26 for starting and stopping the drive unit 13 are provided on the outside of the power compartment 12. Specifically, the drive unit 13 has a power-off decoupling function. In actual use, the power supply 24 is first triggered to be connected through the first switch 25, so that the drive unit 13 is energized to couple the output end, and then the drive unit 13 is triggered to start through the second switch 26, so that the temperature measuring unit 3 and the flow measuring unit 4 are driven to switch high and low positions through the linkage component, and at the same time, the coil spring 15 is deformed and stores elastic potential energy; after the temperature measuring unit 3 and the flow measuring unit 4 switch high and low positions, it is necessary to maintain the high and low positions of the temperature measuring unit 3 and the flow measuring unit 4 to ensure stable measurement, so the drive is triggered through the second switch 26. The driving unit 13 is shut down. At this time, the driving unit 13 is not powered off, and its output end remains coupled, thereby limiting the activities of the temperature measuring unit 3 and the flow measuring unit 4 through the linkage component. Then, the temperature measuring unit 3 and the flow measuring unit 4 are stationary for a period of time to detect a stable value. Then, the first switch 25 is triggered to disconnect the power supply 24, and the driving unit 13 is powered off to decouple the output end. The linkage gear 8 resumes rotation, and then it rotates under the elastic force of the coil spring 15, and then the temperature measuring unit 3 and the flow measuring unit 4 are reset to the initial high and low positions.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A digital temperature transmitter, comprising a meter head (1), a rod body (2), a temperature measuring unit (3) and a flow measuring unit (4), characterized in that: Also includes: Two first movable grooves (5) are arranged in the rod body (2) along the axial direction and are respectively movably connected to the temperature measuring unit (3) and the flow measuring unit (4); the upper ends of the temperature measuring unit (3) and the flow measuring unit (4) are both electrically connected to the meter head (1) via a spiral wire (6); A linkage component, which is used to link the temperature measuring unit (3) and the flow measuring unit (4) and causes the temperature measuring unit (3) and the flow measuring unit (4) to move in an ascending and descending manner; A driving component, used for driving the linkage component to switch the temperature measuring unit (3) and the flow measuring unit (4) between high and low positions; The linkage assembly comprises a synchronous member (7) disposed on both the temperature measuring unit (3) and the flow measuring unit (4); a linkage gear (8) rotatably disposed in the rod body (2) is disposed between the two synchronous members (7); and a linkage rack (9) meshing with the linkage gear (8) is disposed on the synchronous member (7); The driving assembly comprises a power compartment (12) arranged on the side wall of the rod body (2), a driving unit (13) being installed in the power compartment (12), and an output end of the driving unit (13) being drivingly connected to a transmission shaft (14) coaxially fixedly connected to the linkage gear (8); The transmission shaft (14) is sleeved with a synchronous block (16) which is arranged in the rod body (2) and has limited rotation via a coil spring (15); The linkage gear (8) is movably arranged in the rod body (2) so as to be lifted and lowered. The side wall of the rod body (2) is provided with a movable chamber (17) matching with the synchronization block (16). The movable chamber (17) is provided with an elastic member (18) for hindering the movement of the synchronization block (16).

2. The digital temperature transmitter according to claim 1, characterized in that: The synchronizer (7) comprises a splicing portion (701) and a bending portion (702); a splicing groove (10) matching the splicing portion (701) is provided on the temperature measuring unit (3) and the flow measuring unit (4); the bending portion (702) extends from a side of the temperature measuring unit (3) or the flow measuring unit (4) and is used to connect to a linkage rack (9); and a second movable groove (11) matching the bending portion (702) is provided in the rod body (2).

3. The digital temperature transmitter according to claim 1, characterized in that: The output end of the driving unit (13) is connected to a first bevel gear (19) via a clutch assembly, and the transmission shaft (14) is coaxially connected to a second bevel gear (20) meshing with the first bevel gear (19).

4. The digital temperature transmitter according to claim 3, characterized in that: The clutch assembly comprises a first gear (21) coaxially connected to the output end of the drive unit (13), and the first bevel gear (19) is coaxially connected to a second gear (22) matching the first gear (21).

5. The digital temperature transmitter according to claim 3, characterized in that: A casing (23) is movably arranged outside the rod body (2), the first bevel gear (19) and the second bevel gear (20) are arranged inside the casing (23), and the transmission shaft (14) rotates through the casing (23) and drives the casing (23) to move synchronously.

6. The digital temperature transmitter according to claim 1, characterized in that: A power source (24) electrically connected to the drive unit (13) is arranged in the power compartment (12), and a first switch (25) for controlling the on and off of the power source (24) and a second switch (26) for starting and stopping the drive unit (13) are arranged outside the power compartment (12).

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