End face integrated remote thermometer

Abstract

The utility model relates to the technical field of measuring instruments and equipment, in particular to an end face integrated remote thermometer, which comprises a probe rod, a temperature display component, a temperature sensing component, a transmission shaft and a transmission component. Wherein the temperature sensing assembly comprises a first temperature sensing element, a second temperature sensing element and a temperature core seat, the first temperature sensing element is located in the probe rod, and the outer end of the first temperature sensing element is fixedly connected with the temperature core seat. The second temperature sensing element is fixedly installed in the probe rod and located above the first temperature sensing element. And one end of the transmission shaft is fixedly connected with the center end of the first temperature sensing element. When the thermometer is used, the first temperature sensing element is in the planar spiral shape, the second temperature sensing element and the upper portion of the first temperature sensing element are not on the same horizontal plane, the first temperature sensing element stretches out and draws back on the plane when deforming, and stretching out and drawing back of the first temperature sensing element cannot affect the second temperature sensing element and a lead connected with the second temperature sensing element. And the interference condition is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments and equipment, in particular to an end-face integrated remote-transmission thermometer. Background Art

[0002] The main component of a bimetallic thermometer is a temperature core made of two metal sheets laminated together. It works on the principle that two different metals expand to different degrees when the temperature changes. In order to improve the temperature measurement sensitivity, the metal sheets are usually wound into a long spiral shape. When the temperature of the multi-layer metal sheets changes, the expansion or contraction of each layer of metal varies, causing the spiral to roll up or loosen. Since one end of the spiral is fixed and the other end is connected to a freely rotating pointer, when the bimetallic sheet senses the temperature change, the pointer can indicate the temperature on a circular scale.

[0003] Platinum thermal resistors are widely used as high-precision temperature measuring elements that can achieve remote transmission. The remote integrated temperature measuring device that combines the characteristics of bimetallic and platinum thermal resistors can not only see the measured temperature on site, but also transmit it to the remote monitoring room to achieve remote temperature measurement and monitoring. It is currently the most popular temperature measuring instrument.

[0004] However, the remote integrated temperature measuring device in the prior art has some problems when in use: First, in the remote integrated temperature measuring device, the platinum thermistor cannot be too far away from the temperature source to be measured, so as not to reduce the accuracy of the measurement. The platinum thermistor is usually set at an eccentric position of the bimetallic temperature core. When the temperature core rotates, its diameter will change, which is easy to interfere with the platinum thermistor or the lead wire connected to the platinum thermistor, and it is easy to damage the lead wire and the platinum thermistor. At the same time, it is also easy to hinder the expansion and contraction deformation of the bimetallic temperature core, thereby affecting the measurement accuracy of the thermometer. Secondly, because the temperature core is a long spiral, when measuring the temperature, the upper and lower ends of the temperature core are inconsistent due to the inconsistent distance from the temperature source, which makes the deformation of the upper and lower ends of the temperature core inconsistent, thereby affecting the accuracy of the temperature measurement. Utility Model Content

[0005] The utility model aims to provide an end-face integrated remote thermometer, aiming to solve the problem that the lead wire of the platinum thermal resistor is easy to interfere with the temperature core.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] An end-face integrated remote thermometer, comprising:

[0008] The probe rod is a hollow tube;

[0009] A temperature display assembly, connected to the first end of the probe rod, comprising a rotatable temperature pointer;

[0010] The temperature sensing component comprises a first temperature sensing element, a second temperature sensing element and a temperature core seat, wherein the temperature core seat is fixedly connected to the second end of the probe rod, the first temperature sensing element is a planar spiral bimetallic strip, the first temperature sensing element is located in the probe rod, an end of the first temperature sensing element away from the center is fixedly connected to the temperature core seat, the second temperature sensing element is a temperature sensor, the second temperature sensing element is fixedly installed in the probe rod, and the second temperature sensing element is located on the upper side of the first temperature sensing element;

[0011] A transmission shaft is inserted into the probe rod, and one end of the transmission shaft is fixedly connected to one end of the first temperature sensing element located at the center;

[0012] Transmission assembly, the transmission shaft can drive the temperature pointer to rotate through the transmission assembly.

[0013] By adopting the above scheme, when in use, the probe is inserted into the temperature source to be measured, and the first temperature sensing element is deformed after being affected by the temperature, thereby driving the transmission shaft to rotate. The transmission shaft drives the temperature pointer to rotate through the transmission assembly, thereby displaying the temperature. At the same time, the temperature signal is transmitted to the outside through the second temperature sensing element, realizing on-site and remote dual monitoring. Since the first temperature sensing element is a flat spiral, the second temperature sensing element is located above the first temperature sensing element, and the two are not on the same horizontal plane, so that when the first temperature sensing element is deformed, its expansion and contraction will not affect the second temperature sensing element and the lead connected to the second temperature sensing element. At the same time, since the first temperature sensing element is a flat spiral, the distance between its upper and lower end faces is very close, so that the temperature difference between the two ends is small, which improves the accuracy of temperature measurement.

[0014] The utility model is further configured to include a sleeve, the sleeve is fixedly connected to the probe rod, and the transmission shaft is inserted into the sleeve. The transmission shaft is sleeved inside the probe rod by the sleeve arranged inside the probe rod, so that the transmission shaft is isolated from the lead wire of the second temperature sensing element inside the probe rod, thereby preventing interference between the lead wire and the transmission shaft.

[0015] The utility model is further configured that the temperature core seat includes a bottom plate and a side wall connected to each other, the side wall is annular, a slot is provided on the side wall, the end of the first temperature sensing element away from the center has a clamping portion, the clamping portion is clamped and connected in the slot, and the side wall is fixedly connected in the probe rod, so as to facilitate the disassembly and assembly of the first temperature sensing element.

[0016] The utility model is further configured to include a positioning sleeve, the positioning sleeve is fixedly installed in the probe rod, the first temperature sensing element is located between the positioning sleeve and the temperature core seat, and the second temperature sensing element is fixedly connected to the end of the positioning sleeve away from the first temperature sensing element. The positioning sleeve is used to isolate the first temperature sensing element and the second temperature sensing element to avoid interference between the two, thereby ensuring the stability of the thermometer.

[0017] The utility model is further configured such that the end of the positioning sleeve close to the first temperature sensing element has an annular flange, the probe rod has a supporting portion inside, and the side wall and the supporting portion clamp the flange together. The positioning sleeve is fixed to the inner side of the probe rod by the supporting portion and the side wall clamping the flange together, thereby improving the convenience of installing and removing the positioning sleeve.

[0018] The utility model is further configured that the inner side of the probe rod is provided with a reduced diameter section and an expanded diameter section in sequence, the intersection of the reduced diameter section and the expanded diameter section forms the abutment portion, the positioning sleeve is located in the reduced diameter section, and the flange is located in the expanded diameter section. Since the abutment portion is formed at the intersection of the reduced diameter section and the expanded diameter section, the abutment portion in the probe rod is easier to process.

[0019] The utility model is further configured to include a first connector, a second connector and a universal mount, wherein the first connector and the second connector are connected via the universal mount, the first connector is fixedly connected to the temperature display assembly, and the second connector is fixedly connected to the probe rod. The angle of the temperature display assembly can be adjusted via the universal mount to suit different usage requirements.

[0020] The utility model is further configured such that the temperature display assembly further includes a meter head, a dial, a pointer shaft and a zeroing unit, the dial is rotatably mounted on one side of the meter head, the pointer shaft passes through the meter head and the dial, the pointer shaft is rotatably mounted on the meter head, the temperature pointer is fixedly connected to the pointer shaft, and the zeroing unit is used to adjust the dial to rotate to a zeroing position. The dial is adjusted to the zeroing position by the zeroing unit to facilitate manual calibration of the indicated starting point position of the temperature pointer.

[0021] The utility model is further configured such that the zero adjustment unit includes a first gear, a second gear and an adjusting knob, the first gear is fixedly connected to the side of the dial close to the meter head, the adjusting knob is rotatably mounted on the meter head, one end of the adjusting knob is fixedly connected to the second gear, and the first gear and the second gear are meshed and connected. The adjusting knob drives the second gear to rotate, thereby driving the first gear to rotate, and the first gear drives the dial to rotate, thereby manually adjusting the dial to the zero position.

[0022] The utility model is further configured that the transmission assembly includes an angle spring, and the two ends of the angle spring are fixedly connected to the pointer shaft and the transmission shaft respectively. The rotation is transmitted through the angle spring, so that the axial rotation can be transmitted between the pointer shaft and the transmission shaft when the temperature display assembly adjusts the angle.

[0023] In summary, the end-face integrated remote thermometer provided by the utility model has at least the following beneficial effects:

[0024] 1. Effectively avoid interference between the first temperature sensing element and the second temperature sensing element during operation, thereby ensuring the stability of temperature detection.

[0025] 2. Since the first temperature sensing element is in a planar spiral shape, the temperature difference between the upper and lower ends of the first temperature sensing element is small, thereby improving the stability of temperature detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any novel labor.

[0027] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment;

[0028] Figure 2 is a right side view of the embodiment;

[0029] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0030] Figure 4 is an exploded schematic diagram of the probe rod, sleeve, transmission shaft and temperature sensing component in the embodiment;

[0031] Figure 5 yes Figure 4 The enlarged view at a in the middle;

[0032] Figure 6 is a front view of an embodiment;

[0033] Figure 7 yes Figure 6 Sectional view at the middle BB;

[0034] Figure 8 yes Figure 7 The enlarged view at b in the middle;

[0035] Fig. 9 Schematic diagram of the exploded view of the temperature display assembly in the embodiment.

[0036] In the figure: probe rod 1, temperature display component 2, temperature pointer 210, meter head 220, dial 230, pointer shaft 240, panel 250, first through hole 260, second through hole 270, temperature sensing component 3, first temperature sensing element 310, second temperature sensing element 320, temperature core seat 330, side wall 331, bottom plate 332, card slot 333, card connection part 340, lead 350, transmission shaft 4, transmission component 5, transmission joint 510, angle spring 520, sleeve 6, positioning sleeve 7, flange 8, first connector 9, second connector 10, universal mount 11, first gear 12, second gear 13, adjusting knob 14, connecting part 15, first mounting hole 16, second mounting hole 17, three-way pipe 18. DETAILED DESCRIPTION

[0037] In order to make those skilled in the art better understand the technical solution of the utility model, the following Figure 1-9 The utility model is further described in detail with specific implementation methods.

[0038] See also Figure 1-9 The embodiment provides an end-face integrated remote thermometer, comprising a probe rod 1, a temperature display assembly 2, a temperature sensing assembly 3, a transmission shaft 4 and a transmission assembly 5. The probe rod 1 is a hollow tube. The temperature display assembly 2 is connected to the upper end of the probe rod 1, and the temperature display assembly 2 includes a rotatable temperature pointer 210. The temperature display assembly 2 specifically includes a header 220, a dial 230 and a pointer shaft 240. The header 220 is a shell, and one side is a mouth, which is closed by a transparent panel 250. A first through hole 260 is opened in the middle of the header 220, and a second through hole 270 corresponding to the first through hole 260 is opened in the middle of the dial 230. The dial 230 is installed on the inner side of the header 220. The pointer shaft 240 is rotatably installed in the header 220, and the pointer shaft 240 passes through the first through hole 260 and the second through hole 270. One end of the pointer shaft 240 is fixedly connected to the temperature pointer 210, and the dial 230 is located between the pointer and the header 220. The temperature sensing component 3 includes a first temperature sensing element 310, a second temperature sensing element 320 and a temperature core seat 330, and the temperature core seat 330 is fixedly connected to the lower end of the probe rod 1. The first temperature sensing element 310 is a planar spiral bimetallic strip, and the first temperature sensing element 310 is located in the probe rod 1, and the end of the first temperature sensing element 310 away from the center is fixedly connected to the temperature core seat 330. The second temperature sensing element 320 is a temperature sensor, and specifically a platinum thermal resistor in the prior art can be used. The second temperature sensing element 320 is fixedly installed in the probe rod 1, and the second temperature sensing element 320 is located on the upper side of the first temperature sensing element 310. The transmission shaft 4 is passed through the probe rod 1, and the lower end is fixedly connected to the end of the first temperature sensing element 310 located at the center. The transmission shaft 4 can drive the temperature pointer 210 to rotate through the transmission component 5.

[0039] By adopting the above scheme, when in use, the probe rod 1 is inserted into the temperature source to be measured, and the first temperature sensing element 310 is deformed after being affected by the temperature. Since the end of the first temperature sensing element 310 away from the center is fixed, the end of the center of the first temperature sensing element 310 drives the transmission shaft 4 to rotate. The transmission shaft 4 drives the temperature pointer 210 to rotate through the transmission component 5, thereby displaying the temperature. At the same time, the temperature signal is transmitted outward through the second temperature sensing element 320 to achieve on-site and remote dual monitoring. Since the first temperature sensing element 310 is a plane spiral, the second temperature sensing element 320 is located above the first temperature sensing element 310, and the two are not on the same horizontal plane, so that when the first temperature sensing element 310 is deformed, its expansion and contraction deformation will not affect the second temperature sensing element 320 and the lead 350 connected to the second temperature sensing element 320. At the same time, since the first temperature sensing element 310 is a plane spiral, the distance between its upper and lower end faces is very close, so that the temperature difference between the two ends is small, which improves the accuracy of temperature measurement.

[0040] See also Figure 3 and Figure 4 In order to prevent interference between the transmission shaft 4 and the lead wire 350 connected to the second temperature sensing element 320, a sleeve 6 is further included. The sleeve 6 is fixedly connected to the probe rod 1, and the transmission shaft 4 is inserted into the sleeve 6. The transmission shaft 4 is isolated from the lead wire 350 of the second temperature sensing element 320 by the sleeve 6 to prevent interference between the two.

[0041] See also Figure 4 and Figure 5 In order to facilitate the installation and removal of the first temperature sensing element 310, the temperature core seat 330 includes a bottom plate 332 and a side wall 331 connected to each other. The bottom plate 332 is circular, and the side wall 331 is annular. The side wall 331 is located on the upper side of the bottom plate 332. The bottom plate 332 is fixedly connected to the lower end of the probe rod 1, and the bottom plate 332 closes the opening at the lower end of the probe rod 1. A clamping groove 333 is provided on the side wall 331, and the clamping groove 333 is opened downward from the upper end of the side wall 331. The end of the first temperature sensing element 310 away from the center has a clamping portion 340, and the thickness of the clamping portion 340 matches the clamping groove 333. The clamping portion 340 is clamped and connected in the clamping groove 333. Preferably, the clamping portion 340 is hook-shaped. When the clamping portion 340 is clamped in the clamping groove 333, the clamping portion 340 hooks the side wall 331. When installing or removing the first temperature sensing element 310 , the first temperature sensing element 310 can be quickly connected to or separated from the temperature core holder 330 .

[0042] See also Figure 3-5In order to prevent the first temperature sensing element 310 from interfering with the second temperature sensing element 320 when deformed, a positioning sleeve 7 is also included. The positioning sleeve 7 is fixedly installed in the probe rod 1. The lower end of the sleeve 6 is fixedly connected in the positioning sleeve 7. The first temperature sensing element 310 is located between the positioning sleeve 7 and the temperature core seat 330, and the second temperature sensing element 320 is fixedly connected to the upper end of the positioning sleeve 7. The first temperature sensing element 310 and the second temperature sensing element 320 are isolated by the positioning sleeve 7, and the working space of the two is separated to avoid interference between the two, thereby ensuring the stability of the thermometer. In order to facilitate the installation and removal of the positioning sleeve 7, the lower end of the positioning sleeve 7 has an annular flange 8, and the inner side of the probe rod 1 has a reduced diameter section and an expanded diameter section arranged in sequence from top to bottom, and the diameter of the expanded diameter section is larger than the diameter of the reduced diameter section. An annular abutment portion is formed at the junction of the reduced diameter section and the expanded diameter section, and the outer diameter of the flange 8 matches the outer diameter of the expanded diameter section. The supporting portion and the upper end of the side wall 331 clamp the upper and lower sides of the flange 8 together, thereby fixing the positioning sleeve 7 .

[0043] See also Figure 7-9 In order to facilitate the adjustment of the angle of the temperature display assembly 2, the first connector 9, the second connector 10 and the universal mount 11 are also included. The first connector 9 and the second connector 10 are connected by the universal mount 11. The first connector 9 is fixedly connected to the temperature display assembly 2, and the second connector 10 is fixedly connected to the probe 1. The universal mount 11 is a prior art, and is used to adjust the relative position of the first connector 9 and the second connector 10, thereby adjusting the angle of the temperature display assembly 2. The angle of the temperature display assembly 2 is adjusted by the universal mount 11 to meet different usage requirements.

[0044] Please continue reading Figure 7-9 In order to facilitate manual zeroing of the temperature indication, a zeroing unit is also included. The zeroing unit includes a first gear 12, a second gear 13 and an adjusting knob 14. The first gear 12 is fixedly connected to the right side of the dial 230. The left end of the first connector 9 has a connecting portion 15. The left end of the connecting portion 15 passes through the first through hole 260. The first gear 12 is rotatably mounted on the connecting portion 15. The connecting portion 15 is fixedly connected to the meter head 220. The first mounting hole 16 is opened in the middle of the first connector 9 and the second connector 10. The pointer shaft 240 is rotatably mounted in the first mounting hole 16 of the first connector 9. Both ends of the pointer shaft 240 extend outside the first mounting hole 16. A second mounting hole 17 is opened at an eccentric position on the meter head 220. The adjusting knob 14 is rotatably mounted in the second mounting hole 17. The second gear 13 is fixedly connected to the adjusting knob 14. The second gear 13 is fixedly connected to the adjusting knob 14. The second gear 13 is located on the left side of the meter head 220. The first gear 12 is meshed with the second gear 13.

[0045] Please continue reading Figure 3 and Figure 8In some embodiments, the transmission assembly 5 includes an angle spring 520 and two transmission joints 510, and the two transmission joints 510 are fixedly connected to the upper and lower ends of the angle spring 520. The first transmission joint 510 is fixedly connected to the pointer shaft 240, and the second transmission joint 510 is fixedly connected to the upper end of the transmission shaft 4. In order to facilitate the connection of the lead 350 of the second temperature sensing element 320, the upper end of the probe rod 1 is connected to a tee pipe 18, the upper end of the tee pipe 18 is fixedly connected to the lower end of the universal frame 11, and the upper end of the sleeve 6 is fixedly connected in the tee pipe 18. The lead 350 of the second temperature sensing element 320 extends outward from the opening on the side of the tee pipe 18 to facilitate the connection of the wiring box and the transmission equipment.

[0046] It should be noted that the words indicating direction in this article, such as up and down, are all based on Figure 1 The setting of the direction is only for the convenience of description and has no other specific meaning.

[0047] It should also 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 "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an 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 article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0048] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An end-face integrated remote thermometer, characterized in that: include: The probe rod (1) is in the shape of a hollow tube; A temperature display assembly (2), connected to the first end of the probe rod (1), comprising a rotatable temperature pointer (210); A temperature sensing component (3), comprising a first temperature sensing element (310), a second temperature sensing element (320) and a temperature core seat (330), wherein the temperature core seat (330) is fixedly connected to the second end of the probe rod (1), the first temperature sensing element (310) is a planar spiral bimetallic strip, the first temperature sensing element (310) is located in the probe rod (1), an end of the first temperature sensing element (310) away from the center is fixedly connected to the temperature core seat (330), the second temperature sensing element (320) is a temperature sensor, the second temperature sensing element (320) is fixedly installed in the probe rod (1), and the second temperature sensing element (320) is located on the upper side of the first temperature sensing element (310); A transmission shaft (4) is inserted into the probe rod (1), and one end of the transmission shaft (4) is fixedly connected to an end of the first temperature sensing element (310) located at the center; A transmission assembly (5), wherein the transmission shaft (4) can drive the temperature pointer (210) to rotate via the transmission assembly (5).

2. The end-face integrated remote thermometer according to claim 1, characterized in that: It also comprises a sleeve (6), wherein the sleeve (6) is fixedly connected inside the probe rod (1), and the transmission shaft (4) is inserted into the sleeve (6).

3. An end-face integrated remote thermometer as claimed in claim 1 or 2, characterized in that: The temperature core seat (330) comprises a bottom plate (332) and a side wall (331) connected to each other; the side wall (331) is annular and is provided with a slot (333); an end of the first temperature sensing element (310) away from the center has a snap-fit ​​portion (340); the snap-fit ​​portion (340) is snap-fitted and connected in the slot (333); and the side wall (331) is fixedly connected in the probe rod (1).

4. The end-face integrated remote thermometer as claimed in claim 3, characterized in that: The invention also comprises a positioning sleeve (7), wherein the positioning sleeve (7) is fixedly installed in the probe rod (1), the first temperature sensing element (310) is located between the positioning sleeve (7) and the temperature core seat (330), and the second temperature sensing element (320) is fixedly connected to an end of the positioning sleeve (7) away from the first temperature sensing element (310).

5. The end-face integrated remote thermometer as claimed in claim 4, characterized in that: The end of the positioning sleeve (7) close to the first temperature sensing element (310) has an annular flange (8), the probe rod (1) has a supporting portion inside, and the side wall (331) and the supporting portion jointly clamp the flange (8).

6. The end-face integrated remote thermometer as claimed in claim 5, characterized in that: The inner side of the probe rod (1) is provided with a reduced diameter section and an expanded diameter section in sequence, the intersection of the reduced diameter section and the expanded diameter section forms the abutment portion, the positioning sleeve (7) is located in the reduced diameter section, and the flange (8) is located in the expanded diameter section.

7. An end-face integrated remote thermometer as claimed in any one of claims 4 to 6, characterized in that: The device also comprises a first connector (9), a second connector (10) and a universal mount (11); the first connector (9) and the second connector (10) are connected via the universal mount (11); the first connector (9) is fixedly connected to the temperature display assembly (2); and the second connector (10) is fixedly connected to the probe rod (1).

8. The end-face integrated remote thermometer as claimed in claim 7, characterized in that: The temperature display assembly (2) further comprises a meter head (220), a dial (230), a pointer shaft (240) and a zero adjustment unit; the dial (230) is rotatably mounted on one side of the meter head (220); the pointer shaft (240) passes through the meter head (220) and the dial (230); the pointer shaft (240) is rotatably mounted on the meter head (220); the temperature pointer (210) is fixedly connected to the pointer shaft (240); and the zero adjustment unit is used to adjust the dial (230) to rotate to a zero position.

9. The end-face integrated remote thermometer as claimed in claim 8, characterized in that: The zero adjustment unit comprises a first gear (12), a second gear (13) and an adjusting knob (14); the first gear (12) is fixedly connected to a side of the dial (230) close to the meter head (220); the adjusting knob (14) is rotatably mounted on the meter head (220); one end of the adjusting knob (14) is fixedly connected to the second gear (13); and the first gear (12) and the second gear (13) are meshingly connected.

10. The end-face integrated remote thermometer according to claim 8 or 9, characterized in that: The transmission assembly (5) comprises an angle spring (520), and two ends of the angle spring (520) are respectively fixedly connected to the pointer shaft (240) and the transmission shaft (4).

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