Automatic water replenishing device of flow meter

Abstract

The utility model discloses an automatic water replenishing device of a flow meter in the technical field of flow meters, which comprises a water replenishing pipe connected in the middle of the flow meter and a water tank capable of continuously feeding water, a water inlet pipe is arranged on the water tank, the water inlet pipe is communicated with the water replenishing pipe to form a U-shaped pipe structure, an overflow groove is arranged on the water tank, and the overflow groove is communicated with the water replenishing pipe. The problems that in the using process of an existing wet-type gas flow meter, measured gas can take away moisture in the flow meter, the water level in the flow meter needs to be kept by about half, the gas measuring precision of the flow meter can be affected by too much or too little water, and the flow meter is not prone to falling off are solved. The problem that the normal use of the flow meter is affected due to the fact that an existing water replenishing device of the flow meter is easy to replenish excessive or too little water is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, in particular to an automatic water replenishing device for a flow meter. Background Art

[0002] Wet gas flow meters are used to measure gas flow. There are two types of wet gas flow meters: one made of brass is generally used with non-corrosive gases. The other is made of corrosion-resistant stainless steel and can measure corrosive gases. The LMF / LML series wet gas flow meters are commonly used in laboratories. They offer high accuracy when measuring total gas volume, especially at low flow rates, where errors are minimal. They can be used directly to measure gas flow or as a standard instrument to calibrate other flow meters. This type of wet gas flow meter houses a cylindrical rotor surrounded by blades within a closed cylindrical housing, which rotates freely about its central axis. The rotor is divided into three or four chambers by the blades, each with straight slits on the inner and outer walls.

[0003] The flow meter housing is filled with about half of its volume of water or low-viscosity oil as a sealing liquid, and half of the rotor is immersed in the sealing liquid. As the gas enters the flow meter, it enters an air chamber A in the rotor. At this time, the air inlet of air chamber A is exposed to the liquid surface, and the air inlet is connected to the inlet of the flow meter and begins to inflate; air chamber B is already filled with gas, and its inlet and outlet are sealed by the liquid surface, forming a closed "bucket" space, that is, the metering chamber; the air outlet of air chamber C is exposed to the liquid surface and begins to exhaust to the outlet of the flow meter. As the gas continues to fill air chamber A, the rotor moves in the direction as shown in the figure, driven by the inlet pressure. Figure 1 The drum rotates counterclockwise around its central axis. As the air volume in chamber A gradually increases, the outlet of chamber B will also separate from the liquid surface and begin to vent toward the flowmeter outlet, completely discharging the air in chamber C. When chamber C is completely immersed in the liquid, chamber D will begin to inflate, and chamber A will form a closed metering chamber. Then, chambers D and C will form closed metering chambers. For every one rotation of the drum, a volume of gas equivalent to four times the volume of the metering chambers passes through the flowmeter. Therefore, the number of revolutions of the drum is transmitted to a counting and indicating mechanism via a gear mechanism, which displays the volumetric flow rate of gas passing through the flowmeter.

[0004] During the use of existing wet gas flow meters, the measured gas will carry away the moisture inside the flow meter, and the water level inside the flow meter needs to be maintained at about half. Too much or too little water will affect the accuracy of the flow meter's gas measurement. The existing flow meter's water replenishment device is prone to adding too much or too little water, which will affect the normal use of the flow meter.

[0005] Therefore, those skilled in the art provide an automatic water replenishing device for a flow meter to solve the problems raised in the above background technology. Utility Model Content

[0006] The purpose of the present utility model is to provide an automatic water replenishing device for a flow meter to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic water replenishing device for a flow meter, comprising a water replenishing pipe connected to the middle of the flow meter and a water trough that can continuously supply water, the water trough being provided with a water inlet pipe, the water inlet pipe being connected to the water replenishing pipe to form a U-shaped tube structure, the water trough being provided with an overflow trough, the lowest point of the overflow trough being at the same height as the highest water level of the flow meter.

[0008] Preferably, a connecting pipe is connected between the water inlet pipe and the water supply pipe, a float is provided inside the connecting pipe, and the highest point of the float is at the same height as the optimal water level of the flow meter.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. In the present invention, by providing a water inlet pipe and a water supply pipe, the connected water inlet pipe and the water supply pipe can form a U-shaped pipe structure. The water inlet pipe is connected to the water tank. At this time, it is only necessary to maintain the water level in the water tank to determine the maximum water level entering the flow meter. The overflow tank is opened on the water tank, and the height of the overflow tank is determined according to the maximum water level in the flow meter.

[0011] 2. In the present invention, a connecting pipe is provided, which is connected between the water inlet pipe and the water supply pipe. The float is suspended inside the connecting pipe, which can slow down the speed at which water enters the flow meter, avoid excessive water flowing into the flow meter, and facilitate the control of the amount of water entering the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a left side cross-sectional view of the present invention.

[0014] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the figure: 1. Water supply pipe; 2. Water tank; 3. Water inlet pipe; 4. Overflow tank; 5. Connecting pipe; 6. Float. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figures 1 to 3 In an embodiment of the utility model, an automatic water replenishing device of a flow meter includes a water replenishing pipe 1 connected to the middle of the flow meter and a water trough 2 that can continuously inlet water. The water trough 2 is provided with a water inlet pipe 3, and the water inlet pipe 3 is connected with the water replenishing pipe 1 to form a U-shaped tube structure. The water trough 2 is provided with an overflow trough 4, and the lowest point of the overflow trough 4 is at the same height as the highest water level of the flow meter.

[0018] The water supply pipe 1 is connected to the middle part of the flow meter, the water tank 2 can continuously supply water, the water inlet pipe 3 is connected to the middle and upper part of the water tank 2, the water inlet pipe 3 is connected to the water supply pipe 1, and a U-shaped tube structure is formed between the water inlet pipe 3 and the water supply pipe 1. This U-shaped tube structure can keep the water levels in the water supply pipe 1 and the water inlet pipe 3 at the same height. A larger U-shaped tube structure can be formed between the water tank 2 and the flow meter connected by the water inlet pipe 3 and the water supply pipe 1, which can keep the water level in the water tank 2 and the water level inside the flow meter at the same height. The overflow tank 4 is opened on the water tank 2, and the height of the overflow tank 4 is the same as the highest water level of the flow meter. When there is excess water in the water tank 2, it will be discharged from the overflow tank 4 to avoid excessive water being added to the flow meter.

[0019] In one embodiment, specifically, a connecting pipe 5 is connected between the water inlet pipe 3 and the water supply pipe 1, and a float 6 is provided inside the connecting pipe 5. The highest point of the float 6 is at the same height as the optimal water level of the flowmeter. The connecting pipe 5 is connected between the water inlet pipe 3 and the water supply pipe 1, and the float 6 is placed inside the connecting pipe 5. The highest point of the float 6 is at the same height as the optimal water level of the flowmeter. When the water level inside the flowmeter reaches a certain height, due to the existence of the U-tube structure, the water level inside the float 6 will also rise. Since the water entering the connecting pipe 5 has a certain potential energy relative to the connecting pipe 5, the amount of water entering the connecting pipe 5 will be reduced. When the water level inside the flowmeter reaches the highest point, the float 6 can support the connecting pipe 5 so that water no longer enters the connecting pipe 5, which can avoid water backflow inside the connecting pipe 5. When the water level inside the flowmeter drops, the float 6 will also drop. Such a setting can maintain an appropriate amount of water inside the flowmeter.

[0020] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic water replenishing device for a flow meter, characterized in that: The invention comprises a water supply pipe (1) connected to the middle of the flow meter and a water tank (2) capable of continuously supplying water, wherein the water tank (2) is provided with a water inlet pipe (3), the water inlet pipe (3) is connected with the water supply pipe (1) to form a U-shaped pipe structure, and the water tank (2) is provided with an overflow tank (4), the lowest point of the overflow tank (4) being at the same height as the highest water level of the flow meter.

2. The automatic water replenishing device for a flow meter according to claim 1, characterized in that: A connecting pipe (5) is connected between the water inlet pipe (3) and the water supply pipe (1), and a float (6) is provided inside the connecting pipe (5). The highest point of the float (6) is at the same height as the optimal water level of the flow meter.

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