CN212584309U - High-precision V-shaped ball valve suitable for large-temperature-difference energy conveying pipe network - Google Patents
High-precision V-shaped ball valve suitable for large-temperature-difference energy conveying pipe network Download PDFInfo
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- CN212584309U CN212584309U CN202022060719.8U CN202022060719U CN212584309U CN 212584309 U CN212584309 U CN 212584309U CN 202022060719 U CN202022060719 U CN 202022060719U CN 212584309 U CN212584309 U CN 212584309U
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Abstract
The utility model discloses a high-precision V-shaped ball valve suitable for a large-temperature-difference energy conveying pipe network, wherein the main body of a valve core is a hemispherical shell, a valve hole is arranged on the hemispherical shell, the inner surface of the valve hole comprises an arc surface, the two circumferential side edges of the arc surface are connected with one side edges of two symmetrical and mutually parallel rectangular planes, and the other side edges of the two rectangular planes are connected with an arc surface; the valve hole forms a medium flow channel composed of a quasi-circular side flow channel and a narrow and long side flow channel on the hemispherical shell, and the ratio of the length of the quasi-circular side flow channel to the length of the narrow and long side flow channel to the length of the medium flow channel is 1/2. For a large temperature difference energy transmission pipe network, the flow demand of each branch is small, so the requirement for small flow of valve regulation is high. The flow regulation precision in different qualification pressure difference branches can be effectively improved by changing the structure of the valve hole on the valve core of the traditional V-shaped ball valve, so that the regulation sensitivity of the branch with larger qualification pressure difference is improved.
Description
Technical Field
The utility model relates to a balanced governing valve of heat supply pipe network especially relates to a high accuracy valve suitable for pipe network is carried to big difference in temperature energy.
Background
At present, hydraulic imbalance and thermal imbalance phenomena in the operation process of a heating system commonly occur, and the energy consumption caused by the phenomena accounts for about 30% of the total energy consumption. Due to the fact that outdoor weather changes are not measured, living habits of users are different, irregularity of load changes of the heat supply network is increased, and hydraulic balance adjustment needs to be carried out through the adjusting valve. At present, a valve core of the regulating valve mostly adopts a ball valve or a V-shaped ball valve, but in the actual regulating process, the advantage that the ball valve is easy to regulate is not reasonably utilized, so that the accuracy is too low when the heat supply regulation is carried out, and the hydraulic imbalance is caused.
For a heat supply pipe network and a similar large-temperature-difference energy conveying pipe network, the flow demand of each branch is small, so that the requirement for small flow of valve regulation is high. In order to ensure that the energy consumption of the water pump is low, the valve of the farthest branch is normally in a fully-opened state when the flow is designed, and because the performance curve of the ball valve is in an equal percentage characteristic and the impedance of the valve and the opening degree are usually in a power relation of multiple times, the difference between the valve impedance under the large opening degree and the valve impedance under the fully-opened state is not large, except that the valve of the farthest branch is in the fully-opened or large opening degree state, the valves of other branches are normally maintained below 50% of small opening degree in the adjusting process. The existing ball valve is not purposefully changed to improve the adjustment precision, only the aspects of valve characteristic curves and the like are studied, and the actual application effect is poor.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned prior art, the utility model provides a high accuracy V type ball valve suitable for big difference in temperature energy conveying pipe network through changing ball valve case shape to reach the small flow control of high accuracy and realize the curved purpose of percentage performance such as ideal.
In order to solve the technical problem, the utility model provides a high accuracy V type ball valve suitable for big difference in temperature energy supply pipe network, including the valve body, be equipped with the case in the valve body, the main part of case is a hemisphere casing, be equipped with the valve opening on the hemisphere casing, the internal surface of valve opening includes the arcwall face, the circumference both sides limit of arcwall face all links to each other with one side of two symmetrical and mutually parallel rectangle planes, connect with the arc surface between the other side of two rectangle planes; the valve hole forms a medium flow channel composed of a quasi-circular side flow channel and a narrow side flow channel on the hemispherical shell, and the ratio of the length of the quasi-circular side flow channel to the length of the narrow side flow channel to the length of the medium flow channel is 1/2.
Furthermore, the high-precision V-shaped ball valve suitable for the large-temperature-difference energy transmission pipe network of the utility model is characterized in that the projection of the inner surface of the valve hole on the hemispherical shell is symmetrical relative to the axial direction of the pipeline; the projection of the arc-shaped surface on the hemispherical shell is in a quasi-circular shape, the distance L1 between the two farthest points on the quasi-circular shape is the width of the quasi-circular side flow channel, the distance L2 between the two rectangular planes is the width of the long and narrow side flow channel, the length of the medium flow channel with the length L1 being not more than 1/2 in the rotation direction of the valve core is L2 being not more than 1/4L 1.
And a fully-closed position mark is arranged on the valve core, so that the fully-closed position of the valve can be conveniently determined when the valve is installed.
Smooth transition surfaces are arranged on the inner surface of the valve hole and between the valve hole and the surface of the valve body.
High accuracy V type ball valve suitable for big difference in temperature energy conveying pipe network, when the case is in full open position, the medium channel of whole valve opening is in the circulation position. When the valve element is in the small opening range, the elongate side flow passage of the valve hole is in the flow position. When the valve spool is in the wide open range, the partial circular-like side flow passage and the elongate side flow passage of the valve bore are in the flow position.
Compared with the prior art, the beneficial effects of the utility model are that:
in each branch of the heat supply pipe network, except for the farthest branch, the service pressure difference faced by valve adjustment of other branches is far larger than that of the farthest branch, and for the current common heat supply pipe network, due to the limitation of the heat supply common flow value, the impedance of the valve (namely the quotient of the pressure drop on two sides of the valve and the quadratic power of the valve flow) required by valve adjustment of most branches is about 1000 Pa/(m) approximately3And/h) 2, the corresponding valve opening range is basically below 50%, so that each corresponding branch valve adjustment only needs to be in a small opening range (namely, the range below 50% opening). The utility model provides a V type ball valve, because the long and narrow part of the aperture scope corresponding valve opening below its case 50%, so to each branch road valve, compare with other adjusting valve on the market, under the equal the same condition of other regulation operating mode, the utility model discloses the adjustable angle of valve is bigger, and flow control is more accurate.
Drawings
Fig. 1 is a schematic view of a valve core structure of a multi-opening high-precision adjusting V-shaped ball valve provided by the present invention;
FIG. 2 is a structural plan view of a valve core of the multi-opening high-precision adjusting V-shaped ball valve provided by the present invention;
fig. 3 is a schematic structural view of the multi-opening high-precision adjusting V-shaped ball valve provided by the present invention;
fig. 4 is a relation curve of the impedance and the opening degree of the valve core of the present invention.
In the figure:
1-valve core, 2-full-closed position mark, 3-type circular side flow channel, 4-elongated side flow channel and 5-valve body.
Detailed Description
The design of the utility model is that, to heat supply pipe network and similar big difference in temperature energy transport pipe network, each branch road flow demand is less, so the requirement to the valve regulation small discharge is higher. Because pipeline overall arrangement spatial position is different, and different pipe network branch road resources pressure differential changes great, the utility model discloses a ball valve is through changing the structure of valve opening on the traditional V type ball valve case, provides the V type ball valve that can the accurate regulated flow of many apertures, through changing ball valve case shape to reach the little flow control of high accuracy and realize percentage performance curve's such as ideal purpose, thereby improved the regulation sensitivity of the great branch road of resources pressure differential.
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
As shown in fig. 1, fig. 2 and fig. 3, the utility model provides a high accuracy V type ball valve suitable for big difference in temperature energy supply pipe network, including valve body 5, be equipped with case 1 in the valve body 5, the main part of case 1 is a hemisphere casing, be equipped with the type V valve hole that the periphery is the type of convex character type of circular arc transition on the hemisphere casing, nevertheless be different from general V type valve hole, the utility model discloses valve hole in the ball valve comprises type circular side and narrow and long side. The valve hole is characterized in that the inner surface of the valve hole comprises an arc-shaped surface, two circumferential side edges of the arc-shaped surface are connected with one side edges of two symmetrical and parallel rectangular planes, and an arc surface is connected between the other side edges of the two rectangular planes; smooth transition surfaces are arranged on the inner surface of the valve hole and between the valve hole and the surface of the valve body. The valve opening is in the medium circulation passageway that has formed by class circular side circulation passageway 3 and long and narrow side circulation passageway 4 on the hemisphere casing, the ratio of occupying of class circular side circulation passageway 3 length and long and narrow side circulation passageway 4 length relative medium circulation passageway length is 1/2, compares with traditional V type valve opening promptly, the utility model discloses in have length to account for than great long and narrow side circulation passageway 4, long and narrow side circulation passageway 4's length is the 1/2 of whole medium circulation passageway full length, this design can make it possess the equal percentage flow characteristic of valve to have higher flow regulation precision when adjusting in little aperture scope, the pressure differential of the qualification of valve under the full-open state is as little as possible moreover.
The projection of the inner surface of the valve hole on the hemispherical shell is symmetrical relative to the axial direction of the pipeline; the projection of the arc-shaped surface on the hemispherical shell is in a quasi-circular shape, the distance L1 between the two farthest points on the quasi-circular shape is the width of the quasi-circular side flow channel 3, the distance L2 between the two rectangular planes is the width of the long and narrow side flow channel 4, the length of the medium flow channel of which the L1 is not more than 1/2 in the rotating direction of the valve core is not less than 2 and not more than 1/4L 1.
For a heat supply pipe network, a water pump is generally used for providing power for pipe network fluid, each branch of the whole pipe network is distinguished according to the difference of the space distance from the water pump, and in order to ensure that the water pump is subjected to minimum energy consumption and achieve the aim of hydraulic balance, valves on the branches at the farthest ends are kept fully opened or in a large opening degree as much as possible.
The valve core 1 is provided with a fully-closed position mark 2 for determining the fully-closed position of the valve when the valve core is convenient to install, the angle of the valve core relative to the installation position of the valve body can be determined as long as the mark is seen from one end of the valve body when the valve core is installed, and as shown in figure 1, the positioning fully-closed position mark 2 can be a circular mark.
When the valve slide 1 is in the fully open position, the medium channel of the valve bore is completely in the flow position. When the valves of other branches except the farthest branch in the pipe network branch are adjusted to a common small opening range, the long and narrow side circulation channel 4 of the valve hole is in a circulation position. When the spool 1 is in a large opening range, the partial circular-like side flow channel 3 and the elongated side flow channel 4 of the valve bore are in the flow position.
The heat and the flow of the radiator in the heat supply end are usually in a quick-opening relationship, namely, the heat changes greatly in a small flow and is basically unchanged in a large flow. In order to ensure that the relationship of the heat quantity of the radiator of the valve opening degree is linear during valve adjustment so as to improve the stability of an automatic control system, a ball valve or a ball-like valve with an equal percentage performance curve is usually selected as a heat supply valve. As shown in fig. 4, for a valve with an equal percentage characteristic curve, the resistance and the opening degree are in a power relationship, and the resistance value is large and changes obviously in a small opening degree range; the wide opening range has a small and slow impedance value compared with the impedance change under the whole opening and practical application.
In each branch of the heat supply pipe network, the self resistance of each main line of the pipe network and the self local resistance of each device in the pipe network ensure that the qualification pressure difference of other branches is larger except that the qualification pressure difference of the farthest branch is smaller. For a heat supply pipe network, the flow rate of each branch is limited by specific friction resistance, fluid flow velocity and the like. Therefore, according to the branch required flow and the qualification pressure difference under the condition of meeting the hydraulic balance of each branch, the impedance value required to be met by each branch valve can be calculated.
According to the impedance calculation result of each branch valve, the opening degree of each branch valve can be selected by referring to fig. 4. Through verification of a plurality of heat supply secondary pipe network examples, it can be found that except for the most far-end branch which needs to adjust the valve to be kept in a large opening range, the impedance values obtained by most other branches are basically greater than 1000 Pa/(m)3/h) ^2, so the selection valve needs to be kept in a smaller opening range below 50 percent. The utility model discloses in, 3 length of the long and narrow side flow channel of case account for 1/2 of whole valve opening flow channel length, so, can guarantee in the aperture scope below 50%, the fluid just in time only passes through this long and narrow side flow channelThrough the channel 3. So compare with the case of the current valve in market, the utility model discloses a case has bigger control range, possesses higher flow control precision promptly. In addition, in the small opening range, the adjustment range is larger, so that the adjustment of the small flow is more sensitive.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention.
Claims (7)
1. A high-precision V-shaped ball valve suitable for a large-temperature-difference energy transmission pipe network comprises a valve body (5), wherein a valve core (1) is arranged in the valve body (5), and the main body of the valve core (1) is a hemispherical shell; the valve hole forms a medium circulation channel consisting of a quasi-circular side circulation channel (3) and a long and narrow side circulation channel (4) on the hemispherical shell, and the ratio of the length of the quasi-circular side circulation channel (3) to the length of the long and narrow side circulation channel (4) to the length of the medium circulation channel is 1/2.
2. The high-precision V-shaped ball valve suitable for the large-temperature-difference energy transmission pipe network as claimed in claim 1, wherein the projection of the inner surface of the valve hole on the hemispherical shell is symmetrical relative to the axial direction of the pipeline; the projection of the arc-shaped surface on the hemispherical shell is in a similar circle shape, the distance L1 between the two farthest points on the similar circle shape is the width of the similar circle-shaped side flow channel (3), the distance L2 between the two rectangular planes is the width of the long and narrow side flow channel (4), the length of the medium flow channel of which L1 is not more than 1/2 in the rotation direction of the valve core is not less than L2 and not more than 1/4L 1.
3. The high-precision V-shaped ball valve applicable to the large-temperature-difference energy transmission pipe network is characterized in that a full-close position mark (2) is arranged on the valve core, so that the full-close position of the valve can be conveniently determined when the valve is installed.
4. The high-precision V-shaped ball valve applicable to the large-temperature-difference energy transmission pipe network as claimed in claim 1, wherein smooth transition surfaces are arranged on the inner surface of the valve hole and at a position between the valve hole and the surface of the valve body.
5. The high-precision V-shaped ball valve applicable to the large-temperature-difference energy transmission pipe network is characterized in that when the valve core (1) is in the full-open position, the medium channel of the whole valve hole is in the circulation position.
6. The high precision V-shaped ball valve suitable for the large temperature difference energy transmission pipeline network according to claim 1, characterized in that when the valve core (1) is in a small opening range, the narrow side circulation channel (4) of the valve hole is in a circulation position.
7. The high precision V-ball valve for large temperature difference energy transmission pipe network according to claim 1, characterized in that when the valve core (1) is in large opening range, the partial circular-like side flow channel (3) and the elongated side flow channel (4) of the valve hole are in flow position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022060719.8U CN212584309U (en) | 2020-09-18 | 2020-09-18 | High-precision V-shaped ball valve suitable for large-temperature-difference energy conveying pipe network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022060719.8U CN212584309U (en) | 2020-09-18 | 2020-09-18 | High-precision V-shaped ball valve suitable for large-temperature-difference energy conveying pipe network |
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| Publication Number | Publication Date |
|---|---|
| CN212584309U true CN212584309U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022060719.8U Active CN212584309U (en) | 2020-09-18 | 2020-09-18 | High-precision V-shaped ball valve suitable for large-temperature-difference energy conveying pipe network |
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| Country | Link |
|---|---|
| CN (1) | CN212584309U (en) |
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2020
- 2020-09-18 CN CN202022060719.8U patent/CN212584309U/en active Active
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