Precise micro-water sensor

Abstract

The utility model relates to the technical field of micro-water sensors, in particular to a precise micro-water sensor. According to the technical scheme, the pressure relief device comprises a device body, an air inlet and an air outlet are formed in the device body, the pressure relief device further comprises a pressure relief compensation module installed on the air inlet, the pressure relief compensation module comprises a connecting hole communicated with the air inlet and an exhaust hole communicated with the outside, and the pressure relief compensation module is connected with the air inlet according to the air flow rate at the air inlet. And the flow rate of gas entering the connecting hole and the exhaust hole is controlled. Through the arrangement of the pressure relief compensation module, when the external air pressure is increased, the external air pressure can be effectively relieved, the flow rate of air entering the air inlet hole is prevented from being increased, the bearing range of the machine body to the external air pressure can be effectively enlarged, and the flow rate of the air in the machine body is prevented from exceeding the specified range.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro water sensor technical field especially relates to a kind of precision micro water sensors. BACKGROUND

[0002] In industrial production process, micro water sensor is used to monitor the moisture content in gas (such as compressed air, process gas, hydrogen, SF6, etc.), to ensure that the gas is dry, to avoid the adverse effects of moisture on process flow or equipment.

[0003] The flow rate range of gas inside the sensor is determined according to the model of the sensor. When detecting, the gas flow rate needs to be ensured within the specified range of the sensor, but in the actual working environment, the gas pressure fluctuates, which may cause the flow rate of gas inside the sensor to fluctuate, resulting in fluctuation of the flow rate inside the sensor. Inconsistent flow rate may result in the gas sample measured by the sensor being not representative, thereby affecting the accuracy of the measurement result. SUMMARY

[0004] The utility model aims at the problems in the background art, and provides a kind of precision micro water sensor.

[0005] The technical scheme of the utility model: a kind of precision micro water sensor, including fuselage, air inlet and air outlet are equipped on the fuselage, still include:

[0006] Pressure relief compensation module is installed on the air inlet, the pressure relief compensation module includes connecting hole communicated with the air inlet and exhaust hole communicated with the outside, the pressure relief compensation module controls the gas flow rate in the connecting hole and exhaust hole according to the size of the gas flow rate at air inlet.

[0007] Optionally, the pressure relief compensation module includes a pressure relief head fixedly installed on the air inlet, the pressure relief head is provided with first cavity and second cavity, the connecting hole is located in the first cavity and is communicated with the first cavity, and the exhaust hole is located in the second cavity and is communicated with the second cavity.

[0008] Optionally, the pressure relief compensation module further includes an adjusting mechanism for controlling the opening size of the first cavity and the second cavity.

[0009] Optionally, the adjusting mechanism includes a first sliding groove on one side of the first cavity, a second sliding groove on one side of the second cavity, a first connecting groove is provided on the first sliding groove, a second connecting groove is provided on the second sliding groove, a first sealing plate is slidably installed in the first sliding groove, and a second sealing plate is slidably installed in the second sliding groove.

[0010] Optionally, the adjusting mechanism further comprises a telescopic rod fixedly installed on the pressure relief head, one end of the telescopic rod is fixedly installed with a pressing plate, a spring is fixedly installed between the pressing plate and the pressure relief head, both ends of the pressing plate are rotatably installed with connecting rods, and the connecting rods on both sides are rotatably connected with the first sealing plate and the second sealing plate, respectively.

[0011] Optionally, the first cavity and the second cavity are both rectangular in cross section, and the height of the first cavity is less than that of the second cavity.

[0012] Optionally, a silencer is fixedly installed on the pressure relief head and communicates with the exhaust hole.

[0013] In summary, the present application has at least one of the following beneficial technical effects:

[0014] The present application has at least one of the following beneficial technical effects: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structure diagram of the precise micro water sensor is given;

[0016] Figure 2 A perspective view of the precise micro water sensor is given;

[0017] Figure 3 A structure diagram of the pressure relief head is given;

[0018] Figure 4 A structure diagram of the pressure relief head is given;

[0019] Figure 5 A connection relationship diagram of the first sealing plate and the second sealing plate is given;

[0020] Figure 6 A structure diagram of the first cavity and the second cavity is given.

[0021] Label: 1, fuselage; 101, air inlet; 102, air outlet; 2, pressure relief compensation module; 201, pressure relief head; 202, first cavity; 203, second cavity; 204, connecting hole; 205, exhaust hole; 206, first chute; 207, second chute; 208, first connecting groove; 209, second connecting groove; 210, telescopic rod; 211, pressing plate; 212, spring; 213, connecting rod; 214, first sealing plate; 215, second sealing plate; 216, muffler. DETAILED DESCRIPTION

[0022] The technical scheme of the utility model will be further explained in connection with the drawings and specific embodiments.

[0023] Please refer to Figures 1 to 6 As shown in the figure, the utility model provides a precise micro water sensor, which comprises a fuselage 1, the fuselage 1 is provided with an air inlet 101 and an air outlet 102, the gas to be detected will enter the inside of the fuselage 1 through the air inlet 101 and is subjected to numerical detection through the detection element (the detection element is prior art and will not be repeated here) in the inside of the fuselage 1, and the detected gas will be discharged through the air outlet 102. It also comprises a pressure relief compensation module 2 installed on the air inlet 101, the pressure relief compensation module 2 comprises a connecting hole 204 communicated with the air inlet 101 and an exhaust hole 205 communicated with the outside, and the pressure relief compensation module 2 controls the gas flow rate in the connecting hole 204 and the exhaust hole 205 according to the size of the gas flow rate at the air inlet 101. When the external air pressure fluctuates, the gas flow rate in the inside of the pressure relief compensation module 2 will also change, and other flow rates in the inside of the connecting hole 204 are controlled through the pressure relief compensation module 2, so that the influence of air pressure fluctuation on the gas flow rate in the air inlet 101 can be reduced when the external air pressure fluctuates.

[0024] Further, the pressure relief compensation module 2 comprises a pressure relief head 201 fixedly installed on the air inlet 101, the pressure relief head 201 is provided with a first cavity 202 and a second cavity 203, a connecting hole 204 is located in the first cavity 202 and communicates with the first cavity 202, and an exhaust hole 205 is located in the second cavity 203 and communicates with the second cavity 203. The cross sections of the first cavity 202 and the second cavity 203 are both rectangular, the height of the first cavity 202 is less than that of the second cavity 203. When the opening sizes of the first cavity 202 and the second cavity 203 are adjusted, the proportion of the effective air inlets of the first cavity 202 and the second cavity 203 can be changed, the gas entering the first cavity 202 and the second cavity 203 is related to the opening sizes of the first cavity 202 and the second cavity 203, and the proportion of the gas entering the connecting hole 204 and the exhaust hole 205 is the same as the proportion of the effective air inlets of the first cavity 202 and the second cavity 203, thereby changing the proportion of the effective air inlets of the first cavity 202 and the second cavity 203, controlling the amount of gas entering the air inlet 101, and further controlling the flow rate of the gas entering the air inlet 101. The pressure relief compensation module 2 further comprises an adjusting mechanism for adjusting the opening sizes of the first cavity 202 and the second cavity 203.

[0025] The adjusting mechanism comprises a first sliding groove 206 provided on one side of the first cavity 202, a second sliding groove 207 provided on one side of the second cavity 203, a first connecting groove 208 provided on the first sliding groove 206, a second connecting groove 209 provided on the second sliding groove 207, a first sealing plate 214 slidably installed in the first sliding groove 206, and a second sealing plate 215 slidably installed in the second sliding groove 207. By sliding the first sealing plate 214, the effective air inlet on the first cavity 202 can be blocked by the first sealing plate 214, thereby adjusting the area size of the effective air inlet of the first cavity 202. Similarly, by sliding the second sealing plate 215, the area size of the effective air inlet of the second cavity 203 can be adjusted, so that under different air inlet amounts, the first sealing plate 214 and the second sealing plate 215 can be moved to adjust the gas entering the air inlet 101.

[0026] Furthermore, the adjustment mechanism also includes a telescopic rod 210 fixedly installed on the pressure relief head 201. A pressure plate 211 is fixedly installed at the other end of the telescopic rod 210. A spring 212 is fixedly installed between the pressure plate 211 and the pressure relief head 201. Connecting rods 213 are rotatably installed at both ends of the pressure plate 211. The connecting rods 213 on both sides are rotatably connected to the first sealing plate 214 and the second sealing plate 215, respectively. When gas enters the pressure relief head 201, it first applies pressure to the pressure plate 211. When the pressure is high, the gas can push the pressure plate 211 to move and compress the spring 212. At the same time, the moving pressure plate 211 will push the connecting rod 213 to rotate. Under the action of the connecting rods 213 on both sides, the first sealing plate 214 will be pushed to seal the first cavity 202, and the second sealing plate 215 will be pushed to increase the effective air intake area of ​​the second cavity 203. This ensures that the gas entering the connection hole 204 will not increase significantly when the external air pressure increases, thus ensuring the stability and uniformity of the gas entering the body 1, preventing fluctuations in gas flow rate, which would cause the gas sample measured by the sensor to be unrepresentative, and thus effectively ensuring the accuracy of the measurement results.

[0027] It is worth noting that a silencer 216 is fixedly installed on the pressure relief head 201, and the silencer 216 is connected to the exhaust port 205. The gas through the exhaust port 205 will be directly discharged to the outside through the silencer 216. Harmful gases need to be collected and treated to render them harmless. The silencer 216 can reduce the noise generated when the gas is discharged to the outside.

[0028] The working principle of this embodiment is as follows: When gas enters the pressure relief head 201, the gas first applies pressure to the pressure plate 211. When the pressure is high, the gas can push the pressure plate 211 to move and compress the spring 212. At the same time, the moving pressure plate 211 will push the connecting rod 213 to rotate. Under the action of the connecting rods 213 on both sides, the first sealing plate 214 is pushed to seal the first cavity 202, and the second sealing plate 215 is pushed to increase the effective air intake area of ​​the second cavity 203. Thus, when the external air pressure increases, the gas entering the connection hole 204 will not increase significantly, thereby ensuring the stability and uniformity of the gas entering the body 1, preventing fluctuations in gas flow rate, which would cause the gas sample measured by the sensor to be unrepresentative, and thus effectively ensuring the accuracy of the measurement results.

[0029] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A precision micro-water sensor, comprising a body (1), wherein the body (1) is provided with an air inlet (101) and an air outlet (102), characterized in that, Also includes: The pressure relief compensation module (2) installed on the air inlet (101) includes a connecting hole (204) communicating with the air inlet (101) and an exhaust hole (205) communicating with the outside. The pressure relief compensation module (2) controls the gas flow rate entering the connecting hole (204) and the exhaust hole (205) according to the gas flow rate at the air inlet (101).

2. The precision micro-water sensor according to claim 1, characterized in that, The pressure relief compensation module (2) includes a pressure relief head (201) fixedly installed on the air inlet (101). The pressure relief head (201) is provided with a first cavity (202) and a second cavity (203). The connecting hole (204) is located inside the first cavity (202) and communicates with the first cavity (202). The exhaust hole (205) is located inside the second cavity (203) and communicates with the second cavity (203).

3. A precision micro-water sensor according to claim 2, characterized in that, The pressure relief compensation module (2) also includes an adjustment mechanism for controlling the opening size of the first cavity (202) and the second cavity (203).

4. A precision micro-water sensor according to claim 3, characterized in that, The adjustment mechanism includes a first slide groove (206) on one side of the first cavity (202) and a second slide groove (207) on one side of the second cavity (203). The first slide groove (206) is provided with a first connecting groove (208), and the second slide groove (207) is provided with a second connecting groove (209). A first sealing plate (214) is slidably installed in the first slide groove (206), and a second sealing plate (215) is slidably installed in the second slide groove (207).

5. A precision micro-water sensor according to claim 4, characterized in that, The adjustment mechanism also includes a telescopic rod (210) fixedly installed on the pressure relief head (201). A pressure plate (211) is fixedly installed at the other end of the telescopic rod (210). A spring (212) is fixedly installed between the pressure plate (211) and the pressure relief head (201). A connecting rod (213) is rotatably installed at both ends of the pressure plate (211). The connecting rods (213) on both sides are rotatably connected to the first sealing plate (214) and the second sealing plate (215) respectively.

6. A precision micro-water sensor according to claim 5, characterized in that, The cross-sections of the first cavity (202) and the second cavity (203) are both rectangular, and the height of the first cavity (202) is less than that of the second cavity (203).

7. A precision micro-water sensor according to claim 6, characterized in that, A muffler (216) is fixedly installed on the pressure relief head (201), and the muffler (216) is connected to the exhaust port (205).

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