CN201094042Y - Self-force type compound water meter - Google Patents

Abstract

The utility model relates to a self-operated compound water meter which comprises a large flow capacity water meter, a small flow capacity water meter, and a flow capacity converting valve. The utility model is characterized in that the flow capacity converting valve is positioned between a water inlet and a water outlet inside a meter core of the large flow capacity water meter, and the flow capacity converting valve and the water inlet and the water outlet are combined into an integer; the flow capacity converting valve consists of a valve chest, and a valve core; the valve chest is fixed at the bottom end of the guide piece of the water meter, the valve rod of the valve core is cooperated with a bearing sleeve fixed at the bottom end of the guide piece in a sliding way, the bottom end of the valve core is provided with a sealing conic surface and is coincided with the conic surface of the water inlet at the bottom part of the valve chest. The self-operated compound water meter has the beneficial effect that the utility model has the characteristics that the measurement range is wide, the starting flow capacity is small, the minimum flow capacity is low, the sensitivity is high, etc. The utility model stops the defect that the small flow quantity leakage ratio of the present common big-bore and middle-bore water meter is higher, realizes that the meter can make normal measurement at small flow of 30 L / h, and increases the capture ratio of the water fee at a self-running water company. The utility model is particularly suitable for the measurement at the enterprise and the house zone that the flow quantity differential is bigger, the peak-valley water use changes frequently, and small flow capacity water supply often occurs.

Description

Self-operated compound water meter

technical field

The utility model belongs to a water meter, in particular to a self-operated compound water meter which improves the structure of the water meter.

Background technique

Before the utility model was realized, domestic water supply metering mostly used single-caliber horizontal screw-wing or rotor-type water meters. The applicability of this single-caliber water meter is relatively poor. When the water consumption changes greatly, the accuracy of measurement cannot be guaranteed at a small flow rate, and the error is relatively large. In order to solve the above problems, a small-diameter rotor-type meter is installed side by side next to the large and medium-caliber rotor-type meters to achieve the purpose of improving the measurement accuracy, which is called a compound water meter. Although the above-mentioned solutions can overcome some problems in the background technology, there are also many problems at the same time. For example, the compound water meter is composed of a large flow water meter, a small flow water meter and a flow conversion valve. The large flow water meter generally adopts a horizontal spiral wing water meter , the switching valve is also placed horizontally, and the key control element in the switching valve—the existing products generally use springs, which greatly increases the pressure loss of the water meter. Because the springs work in water for a long time, their life is short and their reliability is poor; To install two water meters side by side, it is necessary to design a variety of sealing devices for each connecting component, which is larger and heavier; it not only increases the product cost and installation cost, but also complicates the installation operation, greatly increasing labor intensity and time.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the above-mentioned technologies, and provide a compound water meter suitable for vertical spiral wings. The control valve of the water meter has no elastic elements and seals, and adopts a self-operated structure. It is a self-operated compound water meter with the characteristics of wide range, small starting flow, low lower limit flow, and high sensitivity.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a self-operated compound water meter, including a large flow water meter, a small flow water meter and a flow switching valve, characterized in that: the flow switching valve is placed inside the core of the large flow water meter The water inlet and outlet of the water meter are assembled into one body. The flow switching valve is composed of a valve body and a valve core. The valve body is fixed at the bottom of the guide of the water meter. The bearing sleeve is slidably fitted, and the bottom end of the valve core is provided with a sealing tapered surface which coincides with the tapered surface of the water inlet at the bottom of the valve body.

For the installation of the small flow water meter, one end is connected to the large flow water meter by a telescopic sealing mechanism. The telescopic sealing mechanism is composed of a short pipe and a sealing joint. The sealing joint is connected to one end of the small flow water meter. The short pipe is provided with an O-shaped sealing ring.

The valve core is made of stainless steel, and the valve body is made of reinforced nylon.

The beneficial effects of the utility model: it has the characteristics of wide measuring range, small starting flow, low lower limit flow, high sensitivity and the like. Eliminates the defect of high leakage rate of small flow rate of ordinary medium and large-caliber water meters at present, realizes normal measurement even at a small flow rate of 30L/h, and improves the collection rate of water charges by water companies. It is especially suitable for the measurement of small flow water supply enterprises and residential quarters with large and small flow differences and frequent changes in water use peaks and valleys. In addition to the function of controlling the fluid, the valve body plays a role in stabilizing the fluid, ensuring the stability and accuracy of the water meter measurement.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a structural schematic diagram of a telescopic sealing mechanism;

Fig. 3 is a schematic diagram of connection of a large flow water meter and a small flow water meter.

Detailed ways

As shown in the figure, a self-operated compound water meter includes a large-flow water meter 1, a small-flow water meter 2, and a flow conversion valve 3. The flow conversion valve is placed between the water inlet 4 and the water outlet 5 inside the large-flow water meter core. Assembled into one body, the flow conversion valve is composed of a valve body 6 and a valve core 7, the valve body is fixed at the bottom of the guide 8 of the water meter, the valve stem 9 of the valve core is connected with the bearing sleeve 10 fixed at the bottom of the guide Sliding fit, the top of the valve core is provided with a sealing cone surface 7-1 and coincides with the cone surface 6-2 of the water inlet 6-1 at the bottom of the valve body. One end of the small-flow water meter is connected to the large-flow water meter by a telescopic sealing mechanism. The telescopic sealing mechanism is composed of a short pipe 11 and a sealing joint 12. The sealing joint is connected to one end of the small-flow water meter. The short pipe is provided with an O-shaped seal. The ring 13 can not only make the sealing joint axially slide and rotate on the short pipe, but also play a sealing role. There can be about 15mm of expansion and contraction in the axial direction, so that the installation of the small meter is a non-rigid connection, reducing the axial tension and stress of the small meter, and protecting the life of the water meter shell. The valve core is made of stainless steel, and the valve body is made of reinforced nylon. When the flow rate is less than the set value, the reversing valve is closed, and only the small flow meter measures. When the flow rate is greater than the set value, the reversing valve is opened, and the large and small flow meters measure at the same time, which is used to measure the total volume of water flowing through the pipeline. Working process: When the fluid flows through the water meter and the flow rate is less than the preset value, the pressure and buoyancy generated by the fluid flow are less than the gravity of the valve core itself and the friction with the valve body, and the valve core falls into the water inlet of the valve body In the conical surface of the large water meter, the passage to the large water meter is closed, and the fluid can only be measured by the small water meter through the bypass pipeline of the large meter shell, which is a self-operated structure. When the fluid flows through the water meter and the flow rate is greater than the preset value, the pressure and buoyancy generated by the fluid flow are greater than the gravity of the valve core itself and the friction with the valve body. At this time, the valve core rises under the guidance of the bearing sleeve and opens. The water inlet on the valve body is opened, and the passage to the large water meter is opened. At this time, the fluid is measured by the large water meter and the small water meter.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the structure of the present utility model in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the present utility model.

Claims (3)

1. A self-operated compound water meter, comprising a large-flow water meter, a small-flow water meter and a flow conversion valve, characterized in that: the flow conversion valve is placed between the water inlet and the water outlet of the large-flow water meter core and assembled into one . The flow switching valve is composed of a valve body and a valve core. The valve body is fixed at the bottom of the guide of the water meter. The valve stem of the valve core is slidingly fitted with the bearing sleeve fixed at the bottom of the guide. The bottom of the valve core is provided with The sealing tapered surface matches the tapered surface of the water inlet at the bottom of the valve body. 2. The self-operated compound water meter according to claim 1, characterized in that: one end of the small-flow water meter is connected to the large-flow water meter by a telescopic sealing mechanism, and the telescopic sealing mechanism is composed of a short tube and a sealing joint. The joint is connected with one end of the small flow water meter, and the short pipe is provided with an O-ring. 3. The self-operated compound water meter according to claim 1, characterized in that: the valve core is made of stainless steel, and the valve body is made of reinforced nylon.

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