Water temperature sensor

Abstract

The utility model discloses a water temperature sensor, and particularly relates to the technical field of temperature sensors, the water temperature sensor comprises a hemispherical shell, the hemispherical shell is communicated with an extension pipe, the extension direction of the extension pipe is opposite to the opening direction of the hemispherical shell, a transmission rod is rotatably mounted in the extension pipe, and one end, away from the hemispherical shell, of the extension pipe is communicated with a cylindrical cage shell; the inner side wall of the cage shell is connected with a bimetal vortex sheet, the center end of the bimetal vortex sheet is fixedly connected with a transmission rod, the part, stretching into the hemispherical shell, of the transmission rod is movably connected with a plurality of planetary gear sets which are used for increasing the rotation angle and matched with one another, and the input ends of the planetary gear sets are coaxially and fixedly connected with the transmission rod; the output end of the planetary gear set is coaxially and fixedly connected with a pointer, the opening of the hemispherical shell is provided with a dial plate matched with the pointer, and the opening of the hemispherical shell is in threaded connection with a sealing observation cover, the temperature change of liquid can be rapidly detected, the detection sensitivity is improved, and meanwhile the detection precision of the water temperature sensor is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to temperature sensor technical field, concretely relates to a water temperature sensor. BACKGROUND

[0002] The bimetallic thermometer is a kind of temperature measuring tool made by the sheet welding of two different expansion coefficients of metal.When temperature changes, due to the different degrees of expansion or shrinkage of two kinds of metals, the sheet is bent and deformed, and the corresponding temperature value is indicated by mechanical amplification mechanism, and it is widely used in temperature measurement of industrial and civil equipment.It is simple in structure, low in cost and convenient to use.

[0003] The existing bimetallic thermometer is not in contact with liquid when measuring temperature liquid, and the heat of liquid is conducted to bimetallic sheet through other medium, so that the bimetallic thermometer detects temperature slowly, and is not sensitive enough to temperature change.Therefore, a new type of water temperature sensor is needed. UTILITY MODEL CONTENTS

[0004] To solve the above problems, the utility model discloses a water temperature sensor.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A water temperature sensor, including hemispherical shell, the hemispherical shell is communicated with extension pipe, and the extension pipe extension direction is opposite to the opening direction of hemispherical shell, the transmission rod is rotatably installed in the extension pipe, the cylindrical cage shell is communicated with the one end of extension pipe away from hemispherical shell, the double metal scroll sheet is connected on the inner side wall of cage shell, and the double metal scroll sheet center end is fixedly connected with transmission rod, the transmission rod is moved into the hemispherical shell and is connected with a plurality of planetary gear sets for increasing rotation angle and mutually cooperating, the input end of planetary gear set is coaxially fixedly connected with transmission rod, and the output end of planetary gear set is coaxially fixedly connected with pointer, the dial plate matched with pointer is installed at the opening of hemispherical shell, and the sealing observation cover is screw-connected at the opening of hemispherical shell.

[0007] As a preferred technical scheme of the utility model, the back of dial plate is fixedly installed with the rotary encoder matched with the output end of planetary gear set, and the back of dial plate is also fixedly installed with control panel and battery, and control panel and battery are arranged on the two sides of rotary encoder respectively.

[0008] As a preferred technical scheme of the utility model, the transmission rod is coaxially fixedly sleeved with at least two first bearings, and the first bearing is inlaid in the extension pipe.

[0009] As a preferred technical scheme of the utility model, the transmission rod is coaxially fixedly connected with a planetary gear set, the planetary gear set comprises a planet carrier coaxially fixedly connected with the transmission rod, the planet carrier is provided with at least three planet gears, all the planet gears are jointly meshed with a gear ring fixedly connected with the hemispherical shell, all the planet gears are jointly meshed with a sun gear, the sun gear is coaxially fixedly connected with an output shaft, and the output shaft is fixedly connected with the pointer, and the diameter of the sun gear is smaller than the diameter of the planet gear.

[0010] As a preferred technical scheme of the utility model, the output shaft is coaxially fixedly sleeved with a second bearing, and the second bearing is fixedly embedded in the recess of the dial plate.

[0011] As a preferred technical scheme of the utility model, the sealing observation cover comprises a cover frame threadedly connected with the hemispherical shell, and the cover frame is embedded with a transparent plate.

[0012] As a preferred technical scheme of the utility model, the cover frame and the hemispherical shell are all provided with a polygonal outer ring.

[0013] The utility model discloses the beneficial effect is:

[0014] I, the application is in the measurement liquid such as water, bimetallic scroll piece is completely immersed in liquid, so that bimetallic scroll piece can quickly detect the temperature change of liquid, improve the sensitivity of detection, and the planetary gear set amplifies the rotation angle of transmission rod, so that the rotation angle of pointer increases, and the detection precision of water temperature sensor is increased.

[0015] II, the application is provided with the rotation encoder of detecting the output end rotation angle of planetary gear set, and the rotation encoder emits temperature information to factory temperature monitoring system through control panel, and the practicability of water temperature sensor is improved due to the two temperature value acquisition modes of visual observation temperature and wireless temperature information generation. ACCURACY

[0016] Figure 1 It is the overall structure schematic view of the utility model embodiment;

[0017] Figure 2 It is the explosion view of bimetallic scroll piece, transmission rod, planetary gear set, first bearing, dial plate, rotation encoder, control panel and battery of the utility model embodiment;

[0018] Figure 3 It is the explosion view of dial plate, rotation encoder, control panel, battery and second bearing of the utility model embodiment;

[0019] Figure 4 It is the structure schematic view of planetary gear set of the utility model embodiment;

[0020] Figure 5 The explosion view of the extension pipe, the cage shell and the sealed observation cover of the utility model embodiment;

[0021] Figure 6 The sectional view of the cage shell and the bimetallic scroll plate of the utility model embodiment.

[0022] List of figure marks:

[0023] 1, hemispherical shell; 2, extension pipe; 3, cage shell;

[0024] 4, sealed observation cover; 401, cover frame; 402, transparent plate;

[0025] 5, bimetallic scroll plate; 6, transmission rod;

[0026] 7, planetary gear set; 701, planet carrier; 702, planet wheel; 703, sun gear; 704, output shaft; 705, gear ring;

[0027] 8, first bearing; 9, dial plate; 10, rotary encoder; 11, control board; 12, battery; 13, second bearing; 14, pointer. DETAILED DESCRIPTION

[0028] The utility model will be further illustrated below in conjunction with the drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the utility model and not used to limit the scope of the utility model.

[0029] Please refer to Figures 1-6 A water temperature sensor, including hemispherical shell 1, hemispherical shell 1 is communicated with extension pipe 2, and the extension direction of extension pipe 2 is opposite with the opening direction of hemispherical shell 1. Transmission rod 6 is rotatably installed in extension pipe 2, and the end of extension pipe 2 away from hemispherical shell 1 is communicated with cylindrical cage shell 3. The inner side wall of cage shell 3 is connected with bimetallic scroll plate 5, and the center end of bimetallic scroll plate 5 is fixedly connected with transmission rod 6. Bimetallic scroll plate 5 is composed of two kinds of metals with different linear expansion coefficients, and bimetallic scroll plate 5 does not contact the inner cavity top wall and bottom arm of cage shell 3, so as to reduce the friction when bimetallic scroll plate 5 deforms, so that the water temperature sensor is more sensitive. Transmission rod 6 extends into hemispherical shell 1 and is movably connected with a plurality of planetary gear sets 7 for increasing the rotation angle and cooperating with each other, the input end of planetary gear set 7 is coaxially fixedly connected with transmission rod 6, and the output end of planetary gear set 7 is coaxially fixedly connected with pointer 14. If a plurality of planetary gear sets 7 are installed, the rotation angle of transmission rod 6 can be enlarged multiple times, and the detection accuracy of the water temperature sensor is increased. The dial plate 9 matched with the pointer 14 is installed at the opening of the hemispherical shell 1, and the sealed observation cover 4 is threadedly connected at the opening of the hemispherical shell 1. The dial plate 9 is provided with a scale for indicating temperature on the front surface, and the pointer 14 is matched with the scale of the dial plate 9.

[0030] The back of the dial 9 is fixedly installed with a rotary encoder 10 matched with the output end of the planetary gear set 7. The back of the dial 9 is also fixedly installed with a control board 11 and a battery 12, and the control board 11 and the battery 12 are respectively arranged on both sides of the rotary encoder 10 (so that the overall weight distribution of the water temperature sensor is symmetrical). The battery 12 supplies power to the control board 11, and the rotary encoder 10 is electrically connected with the control board 11. The control board 11 integrates a wireless transmission module. When the output end of the planetary gear set 7 rotates, the rotary encoder 10 outputs a signal to the control board 11, and the control board 11 calculates a temperature value according to the received signal, and the wireless transmission module of the control board 11 sends the temperature value to a corresponding receiving device.

[0031] The transmission rod 6 is coaxially fixedly sleeved with at least two first bearings 8, and the first bearings 8 are embedded in the extension pipe 2. The transmission rod 6 is rotatably connected with the extension pipe 2 by the at least two first bearings 8, which improves the stability of the rotation of the transmission rod 6 and reduces the resistance of the rotation of the transmission rod 6.

[0032] The transmission rod 6 is coaxially fixedly connected with a planetary gear set 7. The planetary gear set 7 includes a planet carrier 701 coaxially fixedly connected with the transmission rod 6. The planet carrier 701 is installed with at least three planet gears 702, and all the planet gears 702 are jointly meshed with a gear ring 705 fixedly connected with the hemispherical shell 1. All the planet gears 702 are jointly meshed with a sun gear 703, the sun gear 703 is coaxially fixedly connected with an output shaft 704, and the output shaft 704 is fixedly connected with the pointer 14. The output shaft 704 is coaxially fixedly sleeved with a second bearing 13, and the second bearing 13 is fixedly embedded in a groove of the dial 9. The output shaft 704 is rotatably connected with the dial 9 through the second bearing 13, which reduces the resistance of the rotation of the output shaft 704. The diameter of the sun gear 703 is smaller than the diameter of the planet gear 702. When the transmission rod 6 rotates, the rotation angle of the output shaft 704 is greater than the rotation angle of the planet carrier 701.

[0033] The sealed observation cover 4 includes a cover frame 401 threadedly connected with the hemispherical shell 1, and the cover frame 401 is embedded with a transparent plate 402 for observing the pointer 14 and the dial 9. The cover frame 401 and the hemispherical shell 1 are both provided with a polygonal outer ring for being screwed by a wrench.

[0034] Working principle:

[0035] In use, the water temperature sensor is put into water, the hemispherical shell 1 floats on the water surface, the cage shell 3 is completely immersed in water, so that the bimetallic vortex sheet 5 is completely immersed in water, then the edge end of the bimetallic vortex sheet 5 is fixed, the center end of the bimetallic vortex sheet 5 drives the rotation of the transmission rod 6, the rotating transmission rod 6 drives the planetary gear set 7, the planetary gear set 7 amplifies the rotation angle of the transmission rod 6, so that the rotation angle of the pointer 14 is increased, the detection accuracy of the water temperature sensor is increased, and the user can observe the scale of the dial 9 indicated by the pointer 14 through the transparent plate 402;

[0036] At the same time that the planetary gear set 7 drives the rotation of the pointer 14 at the output end, the planetary gear set 7 drives the rotation encoder 10 at the output end to output a signal to the control board 11, the control board 11 calculates a temperature value according to the received signal, and the wireless transmission module of the control board 11 sends the temperature value to a corresponding receiving device (the receiving device is part of a factory temperature monitoring system).

[0037] It should be noted that the above content only illustrates the technical thought of the present application, and cannot limit the protection scope of the present application. For ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements fall within the protection scope of the claims of the present application.

Claims

1. A water temperature sensor comprising a hemispherical shell (1), characterized in that, The hemispherical shell (1) is communicated with an extension pipe (2), the extension direction of the extension pipe (2) is opposite to the opening direction of the hemispherical shell (1), a transmission rod (6) is rotatably installed in the extension pipe (2), a cylindrical cage shell (3) is communicated with the end of the extension pipe (2) away from the hemispherical shell (1), a bimetallic scroll piece (5) is connected to the inner side wall of the cage shell (3), the center end of the bimetallic scroll piece (5) is fixedly connected with the transmission rod (6), the transmission rod (6) is movably connected with a plurality of planetary gear sets (7) for increasing the rotation angle and cooperating with each other in the hemispherical shell (1), the input end of the planetary gear set (7) is coaxially fixedly connected with the transmission rod (6), the output end of the planetary gear set (7) is coaxially fixedly connected with a pointer (14), a dial plate (9) adapted to the pointer (14) is installed at the opening of the hemispherical shell (1), and a sealed observation cover (4) is screwedly connected to the opening of the hemispherical shell (1).

2. A water temperature sensor according to claim 1, wherein The back of the dial plate (9) is fixedly installed with a rotary encoder (10) adapted to the output end of the planetary gear set (7), the back of the dial plate (9) is also fixedly installed with a control board (11) and a battery (12), and the control board (11) and the battery (12) are respectively arranged on the two sides of the rotary encoder (10).

3. The water temperature sensor of claim 1, wherein The transmission rod (6) is coaxially fixedly sleeved with at least two first bearings (8), and the first bearings (8) are inlaid in the extension pipe (2).

4. The water temperature sensor of claim 1, wherein The transmission rod (6) is coaxially fixedly connected with a planetary gear set (7), the planetary gear set (7) comprises a planet carrier (701) coaxially fixedly connected with the transmission rod (6), at least three planet gears (702) are installed on the planet carrier (701), all the planet gears (702) are jointly meshed with a gear ring (705) fixedly connected with the hemispherical shell (1), all the planet gears (702) are jointly meshed with a sun gear (703), the sun gear (703) is coaxially fixedly connected with an output shaft (704), and the output shaft (704) is fixedly connected with the pointer (14), and the diameter of the sun gear (703) is smaller than the diameter of the planet gear (702).

5. A water temperature sensor according to claim 4, wherein The output shaft (704) is coaxially fixedly sleeved with a second bearing (13), and the second bearing (13) is fixedly inlaid in the groove of the dial plate (9).

6. The water temperature sensor of claim 1, wherein The sealed observation cover (4) comprises a cover frame (401) screwedly connected with the hemispherical shell (1), and the cover frame (401) is inlaid with a transparent plate (402).

7. A water temperature sensor according to claim 6, wherein The cover frame (401) and the hemispherical shell (1) are both provided with polygonal outer rings.

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