CN202869551U - Water meter vane wheel box - Google Patents
Water meter vane wheel box Download PDFInfo
- Publication number
- CN202869551U CN202869551U CN201220519629.3U CN201220519629U CN202869551U CN 202869551 U CN202869551 U CN 202869551U CN 201220519629 U CN201220519629 U CN 201220519629U CN 202869551 U CN202869551 U CN 202869551U
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- Prior art keywords
- water meter
- flow
- damping plate
- water
- impeller
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000013016 damping Methods 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Measuring Volume Flow (AREA)
Abstract
本实用新型公开了一种水表叶轮盒，属于流量测量设备技术领域，包括本体，所述本体具有一个用于安装叶轮的容纳部，所述容纳部的底部设置有阻尼板，所述阻尼板的外侧面为平滑过渡的曲面。阻尼板的外侧面变成平滑过渡的曲面以后，水流冲刷阻尼板也不易出现分离流和高速流，因此可以大大缩短水表进入到线性工作区的时间。
The utility model discloses a water meter impeller box, which belongs to the technical field of flow measurement equipment, and comprises a body. The body has a receiving part for installing an impeller. The bottom of the receiving part is provided with a damping plate. The outer surface is a smooth transition surface. After the outer surface of the damping plate becomes a smooth and transitional curved surface, the separation flow and high-speed flow are not easy to occur when the water flow scours the damping plate, so the time for the water meter to enter the linear working area can be greatly shortened.
Description
技术领域 technical field
本实用新型涉及一种流量测量设备，尤其是涉及一种水表叶轮。 The utility model relates to a flow measuring device, in particular to a water meter impeller. the
背景技术 Background technique
水表是一种常见的水流量计量工具，其工作原理为，当水由水表表壳进入叶轮盒，冲击叶轮，使叶轮产生驱动力矩，叶轮的驱动力矩大于叶轮的阻力矩时，叶轮开始旋转。当流量一定时，驱动力矩和阻力矩平衡，叶轮保持匀速旋转。通过感知叶轮在水流中的旋转速度来计量管道内水流体的流量和累积流量。 A water meter is a common water flow measurement tool. Its working principle is that when water enters the impeller box from the water meter case and impacts the impeller, the impeller generates a driving torque. When the driving torque of the impeller is greater than the resistance torque of the impeller, the impeller starts to rotate. When the flow rate is constant, the driving torque and resistance torque are balanced, and the impeller keeps rotating at a constant speed. By sensing the rotation speed of the impeller in the water flow, the flow and cumulative flow of the water fluid in the pipeline are measured. the
根据理论分析，水表在紊流阶段，水表的指示误差与水表的粗糙度成反比关系。因此，为降低水表的指示误差，在叶轮盒底部和顶部设置阻尼板制造人为的粗糙度。这些阻尼板一般都是具有直角棱边的长方体。当流量增加时，阻尼板凸缘附近的边界层发生分离。在阻尼板之间形成漩涡区并耗掉水流的一部分能量。为了保持水流量不变，叶轮必须对水流做机械功。因此，叶轮必受到流体附加摩擦阻力矩的作用，这种阻力矩与层流状态下的摩擦阻力矩不同，它与边界的粗糙度密切相关。在一定流量范围内，其阻力系数不仅与边界粗糙度有关，而且也与流量本身有关。但当流量超过一临界值后，其阻力系数不仅与边界粗糙度有关，而且也与流量本身有关。当流量超过一临界值后，它不再随流量变化而变化，而是保持为常数，水表进入线性区。 According to theoretical analysis, when the water meter is in the turbulent flow stage, the indication error of the water meter is inversely proportional to the roughness of the water meter. Therefore, in order to reduce the indication error of the water meter, damping plates are installed on the bottom and top of the impeller box to create artificial roughness. These damping plates are generally cuboids with right-angled edges. When the flow rate increases, the boundary layer near the flange of the damper plate separates. A vortex zone is formed between the damping plates and dissipates part of the energy of the water flow. In order to keep the water flow constant, the impeller must do mechanical work on the water flow. Therefore, the impeller must be affected by the additional frictional torque of the fluid, which is different from the frictional torque in the laminar flow state, and is closely related to the roughness of the boundary. In a certain flow range, its resistance coefficient is not only related to the boundary roughness, but also related to the flow itself. But when the flow exceeds a critical value, the resistance coefficient is not only related to the boundary roughness, but also related to the flow itself. When the flow exceeds a critical value, it no longer changes with the flow, but remains constant, and the water meter enters the linear region. the
当流量超过一临界值后，在叶轮盒底部和顶部增加阻尼板能够加大叶轮盒的粗糙度。现有的具有直角棱边的阻尼板在增加粗糙度的同时，由于其棱角突出，易于产生分离流或高速流，延缓了水表进入线性工作区的时间，不利于水表流量性能的稳定。 When the flow exceeds a critical value, adding damping plates at the bottom and top of the impeller box can increase the roughness of the impeller box. The existing damping plate with right-angled edges increases the roughness, but because of its prominent edges and corners, it is easy to generate separated flow or high-speed flow, which delays the time for the water meter to enter the linear working area, which is not conducive to the stability of the flow performance of the water meter. the
发明内容 Contents of the invention
本实用新型针对现有技术中的不足，提供了一种水表叶轮盒，能够缩短水表进入线性工作区的时间。 Aiming at the deficiencies in the prior art, the utility model provides a water meter impeller box, which can shorten the time for the water meter to enter the linear working area. the
为解决上述技术问题，本实用新型通过下述技术方案得以解决：水表叶轮盒，包括本体，所述本体具有一个用于安装叶轮的容纳部，所述容纳部的底部设置有阻尼板，所述阻尼板的外侧面为平滑过渡的曲面。阻尼板的外侧面变成平滑过渡的曲面以后，水流冲刷阻尼板不易出现分离流和高速流，因此可以大大缩短水表进入到线性工作区的时间。 In order to solve the above technical problems, the utility model is solved by the following technical solutions: the water meter impeller box includes a body, the body has a housing for installing the impeller, the bottom of the housing is provided with a damping plate, the The outer surface of the damping plate is a smoothly transitioned curved surface. After the outer surface of the damping plate becomes a smooth transitional surface, the separation flow and high-speed flow are not easy to occur when the water scours the damping plate, so the time for the water meter to enter the linear working area can be greatly shortened. the
上述技术方案中，优选的，所述阻尼板具有10根以上。原有的水表叶轮盒的阻尼板的数量一般为7根，阻尼板的外侧面变为平滑过渡的曲面以后，其对水流的摩擦力减小，将阻尼板的数量定为10根以上，通过增加阻尼板的密度来保证原有的摩擦力，保证水表在低流量时候计量的准确性。 In the above technical solution, preferably, there are more than 10 damping plates. The number of damping plates in the original water meter impeller box is generally 7. After the outer surface of the damping plate becomes a smooth transition surface, the friction force on the water flow is reduced. The number of damping plates is set to be more than 10. Through Increase the density of the damping plate to ensure the original friction and ensure the accuracy of the water meter when the flow is low. the
上述技术方案中，具体的，所述阻尼板的横截面为半圆形。 In the above technical solution, specifically, the damping plate has a semicircular cross section. the
上述技术方案中，具体的，所述本体的底部设置有与所述容纳部相通的进水口，所述叶轮盒的顶部设置有与所述容纳部相通的出水口。 In the above technical solution, specifically, the bottom of the body is provided with a water inlet that communicates with the accommodating portion, and the top of the impeller box is provided with a water outlet that communicates with the accommodating portion. the
本实用新型的有益效果是：阻尼板的外侧面变成平滑过渡的曲面以后，水流冲刷阻尼板也不易出现分离流和高速流，因此可以大大缩短水表进入到线性工作区的时间。 The beneficial effect of the utility model is: after the outer surface of the damping plate becomes a smoothly transitioned curved surface, the separation flow and high-speed flow are not easy to occur when the water flow washes the damping plate, so the time for the water meter to enter the linear working area can be greatly shortened. the
附图说明 Description of drawings
图1为本实用新型实施例的立体示意图。 Fig. 1 is a three-dimensional schematic diagram of an embodiment of the utility model. the
图2为本实用新型的俯视图。 Fig. 2 is a top view of the utility model. the
具体实施方式 Detailed ways
下面结合附图与具体实施方式对本实用新型作进一步详细描述：参见图1至图2，水表叶轮盒，包括本体1，所述本体1具有一个用于安装叶轮的容纳部11，所述容纳部11的底部成型有12根阻尼板12，所有阻尼板12沿着容纳部11的径向分布。每根阻尼板12的横截面为半圆形。所以阻尼板12的外侧面为平滑过渡的圆柱面。所述本体1的底部设置有与所述容纳部11相通的进水口13，所述本体1的顶部设置有与所述容纳部11相通的出水口14。
The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments: Referring to FIGS. Twelve
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220519629.3U CN202869551U (en) | 2012-10-11 | 2012-10-11 | Water meter vane wheel box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220519629.3U CN202869551U (en) | 2012-10-11 | 2012-10-11 | Water meter vane wheel box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202869551U true CN202869551U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220519629.3U Expired - Lifetime CN202869551U (en) | 2012-10-11 | 2012-10-11 | Water meter vane wheel box |
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| CN (1) | CN202869551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471660A (en) * | 2013-09-09 | 2013-12-25 | 宁波水表股份有限公司 | Impeller box |
-
2012
- 2012-10-11 CN CN201220519629.3U patent/CN202869551U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471660A (en) * | 2013-09-09 | 2013-12-25 | 宁波水表股份有限公司 | Impeller box |
| CN103471660B (en) * | 2013-09-09 | 2016-05-18 | 宁波水表股份有限公司 | A kind of impeller box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315032 No. 268, Lane 99, Beihai Road, Jiangbei District, Zhejiang, Ningbo Patentee after: Ningbo water meter (Group) Co.,Ltd. Address before: 315032 No. 268, Lane 99, Beihai Road, Jiangbei District, Zhejiang, Ningbo Patentee before: NINGBO WATER METER Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
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| CX01 | Expiry of patent term |