Micro-water measuring instrument

Abstract

The utility model discloses a micro-water measuring instrument which comprises a testing chamber, a connecting flange is fixedly mounted at the top of the testing chamber, a mounting bracket is fixedly mounted at the bottom end of the testing chamber, a phosphorus pentoxide packaging bottle is mounted in the mounting bracket, a spiral lifter is vertically mounted in the phosphorus pentoxide packaging bottle, and a water outlet is formed in the bottom end of the testing chamber. The bottom end of the spiral lifter is connected with a permanent magnet, a spiral lifter driving motor is fixedly installed at the bottom end of the installation support, and the driving end of the spiral lifter driving motor is connected with a driving magnet. When the device is used, the loading capacity of phosphorus pentoxide is large, the phosphorus pentoxide does not need to be replaced frequently, and the trouble and the danger are greatly reduced; the replacement process is simple, it can be always guaranteed that fresh phosphorus pentoxide adsorbs sample gas, the measurement precision is guaranteed, a miniature spiral lifting mechanism is adopted, magnet isolation driving is adopted, gas leakage is prevented, the opportunity of making contact with the human body is reduced, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry measuring equipment technical field, concretely is a kind of micro water measuring instrument. BACKGROUND

[0002] The end point determination problem of transformer drying treatment is extremely important for the process of transformer drying treatment, on the one hand, determines the quality of transformer drying treatment, on the other hand, determines production cost, efficiency, energy and environmental protection.

[0003] At present, water vapor partial pressure measuring instrument is used to measure the water vapor partial pressure of the pumped gas in the high vacuum stage of drying process, then the hourly water output is calculated, and finally the water output rate of transformer insulation per ton per hour is obtained by removing the data from the weight of transformer insulation, to indirectly determine whether the drying of transformer can be completed, that is, the judgment standard of transformer drying treatment completion.

[0004] However, the biggest problem of the instrument is that phosphorus pentoxide (P2O5) must be used for measurement, which is theoretically a toxic substance, and is very troublesome to replace, and has certain danger, and the phosphorus pentoxide contacted with sample gas each time can only be the top layer in the bottle, and after absorbing water, it will "crust", affecting the measurement accuracy and also requiring frequent replacement of phosphorus pentoxide, increasing the danger of human contact. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a micro water measuring instrument, which solves the technical problems proposed in the above background art.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: a micro water measuring instrument, comprising a test chamber, a connecting flange is fixedly installed on the top of the test chamber, a motor support is fixedly installed on the top center of the connecting flange, a cover valve motor and a vacuum probe are fixedly installed on the motor support, a cover valve connecting screw rod is connected to the test chamber through the connecting flange at the driving end of the cover valve motor, the vacuum probe is connected to the test chamber through the connecting flange, a cover valve is connected to the bottom end of the cover valve connecting screw rod, an installation support is fixedly installed at the bottom end of the test chamber, a phosphorus pentoxide packaging bottle is installed in the installation support, a spiral elevator is vertically installed in the phosphorus pentoxide packaging bottle, a permanent magnet is connected to the bottom end of the spiral elevator, a spiral elevator driving motor is fixedly installed at the bottom end of the installation support, a driving magnet is connected to the driving end of the spiral elevator driving motor, an air outlet pipe and an air inlet pipe are connected to one side wall surface of the test chamber, an air outlet pipe valve and an air inlet pipe valve are respectively installed on the air outlet pipe and the air inlet pipe.

[0007] Preferably, the top of the phosphorus pentoxide packaging bottle is communicated with the test chamber, and the cover valve completely covers the communicated position of the phosphorus pentoxide packaging bottle and the test chamber.

[0008] Preferably, the phosphorus pentoxide packaging bottle is detachably installed between the mounting bracket.

[0009] Preferably, the air outlet pipe and the air inlet pipe are respectively connected to two ends of the Roots pump.

[0010] Preferably, the driving magnet and the permanent magnet are attracted to each other.

[0011] Beneficial effects

[0012] The micro water measuring instrument has the following beneficial effects: the device has large phosphorus pentoxide loading capacity, and the phosphorus pentoxide does not need to be frequently replaced, so that the trouble and danger are greatly reduced, the replacement process is simple, fresh phosphorus pentoxide can be used to adsorb sample gas at all times, the measurement accuracy is ensured, the miniature screw lifting mechanism is driven by magnets, air leakage is prevented, the opportunity of contacting the human body is reduced, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a structural schematic view of the micro water measuring instrument.

[0014] Figure 2 FIG. 2 is a front view of the micro water measuring instrument.

[0015] In the figure: 1, cover valve motor; 2, motor support; 3, connecting flange; 4, test chamber; 5, cover valve connecting screw rod; 6, cover valve; 7, mounting bracket; 8, phosphorus pentoxide packaging bottle; 9, screw lifter driving motor; 10, driving magnet; 11, permanent magnet; 12, screw lifter; 13, air outlet pipe; 14, air outlet pipe valve; 15, air inlet pipe; 16, air inlet pipe valve; 17, vacuum probe. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] Please refer to Figure 1-2The utility model provides a technical solution for a micro-water measuring instrument: a micro-water measuring instrument, comprising a test chamber 4, a connecting flange 3 is fixedly installed on the top of the test chamber 4, a motor bracket 2 is fixedly installed on the top center of the connecting flange 3, a cover valve motor 1 and a vacuum probe 17 are fixedly installed on the motor bracket 2, the driving end of the cover valve motor 1 passes through the connecting flange 3 to the test chamber 4 and is connected to the cover valve connecting screw rod 5, the vacuum probe 17 passes through the connecting flange 3 and is connected to the test chamber 4, the bottom end of the cover valve connecting screw rod 5 is connected to the cover valve 6, the test chamber 4 A mounting bracket 7 is fixedly installed at the bottom end, a phosphorus pentoxide packaging bottle 8 is installed in the mounting bracket 7, a spiral lift 12 is vertically installed in the phosphorus pentoxide packaging bottle 8, the bottom end of the spiral lift 12 is connected to a permanent magnet 11, a spiral lift drive motor 9 is fixedly installed at the bottom end of the mounting bracket 7, and the driving end of the spiral lift drive motor 9 is connected to a driving magnet 10, an outlet pipe 13 and an inlet pipe 15 are connected to one side wall of the test chamber 4, and an outlet pipe valve 14 and an inlet pipe valve 16 are respectively installed on the outlet pipe 13 and the inlet pipe 15.

[0018] Furthermore, the top of the phosphorus pentoxide packaging bottle 8 is connected to the test chamber 4 , and the cover valve 6 completely covers the connection between the phosphorus pentoxide packaging bottle 8 and the test chamber 4 .

[0019] Furthermore, the phosphorus pentoxide packaging bottle 8 and the mounting bracket 7 can be detachably mounted.

[0020] Furthermore, the air outlet pipe 13 and the air inlet pipe 15 are respectively connected to the two ends of the Roots pump across the boundary.

[0021] Furthermore, the driving magnet 10 and the permanent magnet 11 attract each other.

[0022] Example: When using this device, the outlet pipe 13 and the inlet pipe 15 are placed across the ends of a Roots pump. The pressure differential between the inlet and outlet of the Roots pump causes a small stream of pumped gas to flow in the opposite direction through the inlet and outlet valves, controlled by a computer program. This then blocks a portion of the sample gas. The larger-diameter cover valve is then opened, allowing the sample gas to fully contact the phosphorus pentoxide trapped beneath the cover valve. Over time, moisture in the sample gas is completely adsorbed, resulting in so-called "absolutely dry gas" with a dew point of -90°C. This is nearly 20°C lower than the -70°C of typical dew point meters. Furthermore, the large phosphorus pentoxide loading capacity eliminates the need for frequent replacement, significantly reducing the hassle and risk.

[0023] Each time, the phosphorus pentoxide that comes into contact with the sample gas can only be the top layer in the bottle. When the spiral lift drive motor 9 drives the driving magnet 10 to rotate, the driving magnet 10 and the permanent magnet 11 attract each other, driving the permanent magnet 11 and the spiral lift 12 to rotate. The appropriate rotation and lifting speeds are controlled according to needs to ensure that the scab sinks, while the top layer always keeps fresh phosphorus pentoxide, which has the best adsorption effect, thereby ensuring the best measurement accuracy of the instrument.

[0024] The spiral lift is made of plastic or stainless steel. The bottom layer is sealed with a permanent magnet that attracts the magnet at the bottom of the loading bottle. The transmission motion and power are driven by magnet isolation, without any possibility of leakage, and it is maintenance-free.

[0025] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A micro-water measuring instrument, comprising a test chamber (4), characterized in that: The top of the test chamber (4) is fixedly mounted with a connecting flange (3), the center of the top of the connecting flange (3) is fixedly mounted with a motor bracket (2), the motor bracket (2) is fixedly mounted with a cover valve motor (1) and a vacuum probe (17), the driving end of the cover valve motor (1) passes through the connecting flange (3) and is connected to a cover valve connecting screw rod (5) in the test chamber (4), the vacuum probe (17) passes through the connecting flange (3) and is connected to the test chamber (4), the bottom end of the cover valve connecting screw rod (5) is connected to a cover valve (6), and the bottom end of the test chamber (4) is fixedly mounted with a mounting bracket (7). A phosphorus pentoxide packaging bottle (8) is installed in the mounting bracket (7), a spiral elevator (12) is vertically installed in the phosphorus pentoxide packaging bottle (8), the bottom end of the spiral elevator (12) is connected to a permanent magnet (11), a spiral elevator drive motor (9) is fixedly installed at the bottom end of the mounting bracket (7), the driving end of the spiral elevator drive motor (9) is connected to a driving magnet (10), an air outlet pipe (13) and an air inlet pipe (15) are connected to a side wall of the test chamber (4), and an air outlet pipe valve (14) and an air inlet pipe valve (16) are respectively installed on the air outlet pipe (13) and the air inlet pipe (15).

2. A micro-water measuring instrument according to claim 1, characterized in that: The top of the phosphorus pentoxide packaging bottle (8) is connected to the test chamber (4), and the cover valve (6) completely covers the connection between the phosphorus pentoxide packaging bottle (8) and the test chamber (4).

3. A micro-water measuring instrument according to claim 1, characterized in that: The phosphorus pentoxide packaging bottle (8) and the mounting bracket (7) are detachably mounted.

4. A micro-water measuring instrument according to claim 1, characterized in that: The air outlet pipe (13) and the air inlet pipe (15) are respectively connected to two ends of the Roots pump via a cross-border connection.

5. The micro-water measuring instrument according to claim 1, characterized in that: The driving magnet (10) and the permanent magnet (11) are attracted to each other.

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