CN217601359U - Automatic drainage type water measuring weir structure free from environmental influence - Google Patents
Automatic drainage type water measuring weir structure free from environmental influence Download PDFInfo
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- CN217601359U CN217601359U CN202220864334.3U CN202220864334U CN217601359U CN 217601359 U CN217601359 U CN 217601359U CN 202220864334 U CN202220864334 U CN 202220864334U CN 217601359 U CN217601359 U CN 217601359U
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Abstract
The utility model discloses an automatic drainage type water measuring weir structure free from environmental influence, which comprises a water measuring weir body, a weir front rain-proof device, a weir rear backwater prevention device and an automatic drainage device; the water return prevention device behind the weir is positioned in the downstream area of the weir plate, and the water return prevention device behind the weir can be hermetically connected with the left side, the right side and the bottom of the weir body of the water measuring weir and is used for preventing the water body from recharging when the water level is high at the downstream; the automatic water discharging device is used for discharging the water body between the weir plate and the water return preventing device behind the weir to the downstream side of the water return preventing device behind the weir, and the water level requirement between the weir plate and the water return preventing device behind the weir is maintained; the pre-weir rainproof device is used for preventing rainfall from entering a weir body and eliminating the influence of the rainfall on the upstream water inflow. Through the mode of combining up-blocking and down-discharging, the influence of rainwater and backwater on the upstream and downstream water levels of the weir plate of the measuring weir is eliminated, and the accurate measurement of the flow is realized.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering, a avoid environmental impact's automatic drainage type weir structure is related to.
Background
The measuring weir is a device for calculating the water quantity passing through the cross section of a weir opening in unit time by measuring the water head at the top of the weir. The earliest and most commonly used thin-walled weirs with specially made notches were classified into triangular weirs, trapezoidal weirs, rectangular weirs, and curved weirs. The thin-wall weir has the characteristics of simple manufacture, easy installation, lower manufacturing cost, higher precision and the like, so the thin-wall weir is widely used for monitoring the seepage flow of hydraulic buildings such as dams, engineering side slopes and the like of conventional hydropower stations or pumping and storage power stations. The flow measurement through the water measuring weir is important content for carrying out safety monitoring on the hydraulic structure, and the enhancement of the flow monitoring has extremely important significance for ensuring the safety of the hydraulic structure.
The basic principle of measuring the weir is to convert the upstream water level of the weir plate into flow through a weir flow formula or a water level-flow chart drawn in advance. In addition, free overflow and two kinds of flow states of flooding outflow are occasionally passed through the weir plate breach to rivers, have better measurement precision when wherein adopting free overflow, should have certain flood peak difference around this flow state requirement weir plate. In practical application of the traditional water measuring weir, the water levels in the front and the back of the weir plate are inevitably influenced by external environmental factors such as rainfall, backwater and the like, and great errors are brought to flow measurement.
Therefore, how to reduce or even avoid the influence of external environmental factors such as rainfall and backwater on the water level before and after the weir plate becomes a problem to be solved urgently in the accurate flow measurement of the water measuring weir.
SUMMERY OF THE UTILITY MODEL
The purpose is as follows: in order to overcome the defects existing in the prior art, the utility model provides an automatic drainage type measuring weir structure free from environmental influence. The influence of rainwater and backwater on the upstream and downstream water levels of the weir plate of the water measuring weir is eliminated by combining the upper retaining mode and the lower retaining mode, and the accurate measurement of the flow is realized; meanwhile, the integral structure is simple, the manufacture and the installation are convenient, the overhaul and the maintenance are easy, and the weir body can be additionally arranged on the original traditional weir body.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme does:
in a first aspect, an automatic drainage type water measuring weir structure free from environmental influence is provided, which comprises a water measuring weir body, a front weir rainproof device, a rear weir backwater preventing device and an automatic drainage device;
a weir plate is arranged in the cross section of the weir body of the water measuring weir along the water flow direction, and the weir plate divides the weir body of the water measuring weir into an upstream area of the weir plate and a downstream area of the weir plate and is used for measuring the flow of the water flow at the weir plate;
the device for preventing backwater behind the weir is positioned in the downstream area of the weir plate, and the device for preventing backwater behind the weir can be hermetically connected with the left side, the right side and the bottom of the weir body of the water measuring weir and is used for preventing the water body from recharging at the high water level of the downstream;
the automatic water discharging device is used for discharging the water body between the weir plate and the water return preventing device behind the weir to the downstream side of the water return preventing device behind the weir, and the water level requirement between the weir plate and the water return preventing device behind the weir is maintained;
the rain-proof device in front of the weir is at least arranged in the upstream area of the weir plate and above the weir plate and is used for preventing rainfall from entering the weir body and eliminating the influence of the rainfall on the upstream water inflow.
In some embodiments, the water return prevention device behind the weir is a fixed wall structure or a gate structure capable of moving up and down.
In some embodiments, the behind-weir water return prevention device is arranged in parallel with the weir plate.
In some embodiments, the top elevation of the post-weir water return prevention device is greater than the maximum possible water level elevation downstream of the post-weir water return prevention device.
In some embodiments, the pre-weir flashing arrangement includes a rain retaining substructure, a water catchment substructure, and a flow directing substructure; the rain sheltering substructure is obliquely arranged in the upstream area of the weir plate and above the backwater preventing device from the weir plate to the weir, and the lower end of the rain sheltering substructure extends to the downstream side of the backwater preventing device from the weir plate to the weir; follow measuring weir body length direction is provided with the catchment substructure of ditch body structure respectively in measuring weir body both sides, drainage substructure intercommunication catchment substructure prevents the low reaches of backwater device behind weir, keep off rain substructure both sides and lie in the top of catchment substructure or extend to outside the catchment substructure.
In some embodiments, the automatic drain device comprises a low level drain sub-device, a high level drain sub-device;
the low-position drainage sub-device comprises a low-position drainage pipe and a valve arranged on the low-position drainage pipe, the low-position drainage pipe is arranged in the weir rear water return prevention device in a penetrating mode, an inlet of the low-position drainage pipe is located on the upstream side of the weir rear water return prevention device, and an outlet of the low-position drainage pipe is located on the downstream side of the weir rear water return prevention device;
the high-level water discharging sub-device comprises a high-level water discharging pipe and a water pump for driving water discharging; the water pump is connected with the high-position drain pipe, the inlet of the high-position drain pipe is positioned on the upstream side of the water return prevention device behind the weir, the outlet of the high-position drain pipe is positioned on the downstream side of the water return prevention device behind the weir, and the outlet of the high-position drain pipe is higher than the highest water level of the downstream side of the water return prevention device behind the weir.
In some embodiments, the automatic drainage device further comprises an automatic switch for controlling the switching between the low level drainage sub-device and the high level drainage sub-device.
In some embodiments, the upstream side and the downstream side of the weir rear water return prevention device are respectively provided with an automatic water level meter for monitoring water level values of the upstream side and the downstream side of the weir rear water return prevention device and transmitting the water level values to the automatic drainage control device, and the automatic drainage control device sends an instruction to the automatic change-over switch to control and switch the low-level drainage sub-device and the high-level drainage sub-device by judging the water level values of the upstream side and the downstream side of the weir rear water return prevention device.
The working method of the automatic water discharge type measuring weir structure free from environmental influence comprises the following steps:
respectively reading water level values of the upstream side and the downstream side of the backwater prevention device behind the weir through an automatic water level meter;
(A) If the backwater prevention device behind the weir is a fixed structure:
when the downstream water level of the water return prevention device behind the weir is lower than the upstream water level, the high-level water discharge sub-device is selected to be closed through the automatic change-over switch, the low-level water discharge sub-device is started, the valve is opened, and the purpose of reducing the water level behind the weir plate is achieved through the water discharge pipe in a self-flowing mode;
when the downstream water level of the water return prevention device behind the weir is higher than the upstream water level, the low-level water discharging sub-device is selected to be closed through the automatic change-over switch, the high-level water discharging sub-device is started, the water pump is started, and the purpose of reducing the water level behind the weir plate is achieved through the water discharging pipe in a water pump forced discharging mode;
(B) If the backwater prevention device behind the weir is a movable structure:
when the downstream water level of the water return prevention device behind the weir is lower than the upstream water level, the high-level water drainage sub-device is selected to be closed through the automatic change-over switch, and the water return prevention device behind the weir moves upwards to be opened, so that the aim of reducing the water level behind the weir plate is fulfilled in a self-flowing mode;
when preventing backwater device low reaches water level behind the weir is higher than the upper reaches water level, prevent backwater device closure behind the weir through automatic transfer switch selection, high-order drainage sub-device starts simultaneously, and the water pump is opened to the water pump is forced to arrange the form and is reached the purpose that reduces water level behind the weir plate through the drain pipe.
Has the advantages that: the utility model provides an automatic drainage type weir structure of exempting from environmental impact through "keep off" and "arrange down" the mode that combines together, has got rid of the influence of rainwater and return water to weir plate low reaches water level, has realized the accurate measurement of flow. Has the following advantages:
(1) The two modes of 'upper retaining' and 'lower retaining' are integrated, and the influence of rainwater on the upstream water level of the weir plate and the influence of backwater on the downstream water level of the weir plate are respectively eliminated;
(2) The parts of the front rain-proof device, the rear backwater-proof device, the automatic drainage device and the like adopt split structures, and are easy to replace when local parts are damaged;
(3) The structure can be additionally arranged on the original traditional weir body without repeated investment;
(4) The whole structure is simple, the manufacture and the installation are convenient, and the overhaul and the maintenance are easy.
Drawings
Fig. 1 is an overall three-dimensional view of an apparatus according to an embodiment of the present invention;
fig. 2 is a side view of an apparatus according to an embodiment of the present invention;
fig. 3 is a detailed view of an automatic drainage device in an apparatus according to an embodiment of the present invention.
In the figure: the device comprises a measuring weir body 1, a weir plate 1-1, a weir plate upstream 1-2, a weir plate downstream 1-3, a weir front rain-proof device 2, a rain-proof sub-device 2-1, a water catchment sub-device 2-2, a flow guide sub-device 2-3, a weir rear water return prevention device 3, an automatic drainage device 4, a low-level drainage sub-device 4-1, a high-level drainage sub-device 4-2, an automatic switch 4-3 and an automatic water level meter 4-4.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Unless specifically stated otherwise, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting with respect to the scope of the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected or detachably connected or integral to one another; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Example 1
As shown in fig. 1 to 3, an automatic water discharge type weir structure protected from environmental influences includes a weir body 1, a weir front rain guard 2, a weir rear water return prevention device 3, and an automatic water discharge device 4;
a weir plate 1-1 is arranged in the cross section of the weir body 1 along the water flow direction, and the weir plate 1-1 divides the weir body 1 into an upstream 1-2 area of the weir plate and a downstream 1-3 area of the weir plate and is used for measuring the flow of the water flow at the weir plate;
the device 3 for preventing backwater behind the weir is positioned in the downstream 1-3 area of the weir plate, and the device 3 for preventing backwater behind the weir can be hermetically connected with the left side, the right side and the bottom of the weir body 1 of the water measuring weir, so that the backwater of a water body at a high downstream water level can be prevented, and the influence of the downstream water level on the flow can be reduced;
the automatic water discharging device 4 is used for discharging the water body between the weir plate 1-1 and the weir rear water return prevention device 3 to the downstream side of the weir rear water return prevention device 3 and maintaining the water level requirement between the weir plate 1-1 and the weir rear water return prevention device 3;
the pre-weir rainproof device 2 is at least arranged in the upstream 1-2 area of the weir plate and above the weir plate 1-1 and is used for preventing rainfall from entering a weir body and eliminating the influence of the rainfall on the upstream water inflow.
In some embodiments, the weir-rear water return prevention device is located in a weir or river channel at a distance behind the weir plate.
In some embodiments, the automatic drainage device is positioned between the weir plate and the water return prevention device behind the weir.
In some embodiments, the water return prevention device 3 behind the weir is a fixed wall structure or a gate structure capable of moving up and down.
In some embodiments, the behind-weir water return prevention device 3 is arranged in parallel with the weir plate.
In some embodiments, the top elevation of the post-weir water return prevention device 3 is greater than the maximum possible water level elevation downstream of the post-weir water return prevention device.
The rain-proof device in front of the weir consists of three parts of substructures of rain shielding, water collection and drainage, wherein the rain shielding substructures are positioned above a weir body at the upstream of the weir plate, so that rainwater is prevented from directly entering the weir body; the catchment substructures are positioned on two sides of the weir body, so that surface runoff formed by rainfall is prevented from entering the weir body; the drainage substructure leads to the downstream of the water return prevention device behind the weir from two sides of the weir body, and the drainage of the sheltered and collected rainwater to the downstream is realized.
In some embodiments, as shown in fig. 1 and 2, the pre-weir flashing 2 comprises a rain-sheltering substructure 2-1, a water-catchment substructure 2-2 and a water-guiding substructure 2-3; the rain sheltering substructure 2-1 is obliquely arranged in an upstream area 1-2 of the weir plate and above the backwater prevention device from the weir plate to the weir, and the lower end of the rain sheltering substructure 2-1 extends to the downstream side of the backwater prevention device 3 after the weir; along the length direction of the measuring weir 1, water catchment substructures 2-2 of the channel structures are respectively arranged on two sides of the measuring weir 1, the drainage substructures 2-3 are communicated with the water catchment substructures 2-2 to the downstream of the weir back water return prevention device 3, and two sides of the rain sheltering substructures 2-1 are positioned above the water catchment substructures 2-2 or extend out of the water catchment substructures 2-2. And guiding the sheltered and collected rainwater to the downstream of the water return prevention device 3 behind the weir.
In some embodiments, as shown in FIG. 3, the automatic drain 4 includes a low level drain sub-assembly 4-1, a high level drain sub-assembly 4-2;
the low-level drainage sub-device 4-1 comprises a low-level drainage pipe 4-1-1 and a valve 4-1-2 arranged on the low-level drainage pipe 4-1-1, the low-level drainage pipe 4-1-1 is arranged in the weir rear water return prevention device 3 in a penetrating mode, an inlet of the low-level drainage pipe 4-1-1 is located on the upstream side of the weir rear water return prevention device 3, and an outlet of the low-level drainage pipe 4-1-1 is located on the downstream side of the weir rear water return prevention device 3;
the high-level water discharging sub-device 4-2 comprises a high-level water discharging pipe 4-2-2 and a water pump 4-2-1 for driving water discharging; the water pump 4-2-1 is connected with the high-position drain pipe 4-2-2, an inlet of the high-position drain pipe 4-2-2 is positioned on the upstream side of the water return prevention device 3 behind the weir, an outlet of the high-position drain pipe 4-2-2 is positioned on the downstream side of the water return prevention device 3 behind the weir, and an outlet of the high-position drain pipe 4-2-2 is higher than the highest water level of the downstream side of the water return prevention device 3 behind the weir.
In some embodiments, the inlet of the high-level drain pipe is positioned at the upper part of the bottom plate of the weir groove at the downstream side of the weir plate, and the outlet of the high-level drain pipe passes through the top of the water return prevention device behind the weir and then leads to the downstream side of the water return prevention device behind the weir.
In some embodiments, the automatic water discharging device 4 further comprises an automatic switch 4-3, and the automatic switch 4-3 is used for controlling the starting condition of switching the low-level water discharging sub-device 4-1 and the high-level water discharging sub-device 4-2.
In some embodiments, the upstream side and the downstream side of the weir rear water return prevention device are respectively provided with an automatic water level meter 4-4 for monitoring the water level values of the upstream side and the downstream side of the weir rear water return prevention device 3 and transmitting the water level values to the automatic drainage control device, and the automatic drainage control device sends an instruction to the automatic switch 4-3 to control and switch the low-level drainage sub-device 4-1 and the high-level drainage sub-device 4-2 by judging the water level values of the upstream side and the downstream side of the weir rear water return prevention device 3.
When the backwater prevention device behind the weir is of a fixed structure, a low-position drainage sub-device of the automatic drainage device can be adopted; when the backwater prevention device is of a movable structure behind the weir, the low-position water discharging sub-device is not arranged, and the self-drainage is realized by opening the backwater prevention device behind the upper moving weir.
The automatic drainage device comprises a low-position drainage sub-device, a high-position drainage sub-device, an automatic change-over switch and 2 automatic water level meters, wherein the low-position drainage sub-device comprises a low-position drainage pipe and a valve, when the downstream water level of the water return prevention device behind the weir is lower than the inlet of the low-position drainage pipe, the valve is opened to reduce the rear water level of the weir plate in a self-flowing mode, and when the downstream water level of the water return prevention device behind the weir is higher than the inlet of the low-position drainage pipe, the valve is closed to prevent water return; the high-position drainage sub-device consists of a high-position drainage pipe and a water pump, when the downstream water level of the water return prevention device behind the weir is lower than the inlet of the low-position drainage pipe, the water pump is closed, and when the downstream water level of the water return prevention device behind the weir is higher than the inlet of the low-position drainage pipe, the water pump is opened, and the high-position drainage pipe is used for draining water to the downstream; the automatic change-over switch is connected with a valve of the low-level water discharging sub-device and a water pump of the high-level water discharging sub-device and used for switching the starting of the high-level water discharging sub-device and the low-level water discharging sub-device according to the water level conditions of the water returning prevention device behind the weir; the 2 automatic water level meters are respectively arranged in the front and the back of the water return prevention device behind the weir and are used for measuring the front and the back water levels of the water return prevention device behind the weir.
Example 2
The method of operating an environmentally protected, self-draining weir construction according to embodiment 1, comprising:
respectively reading the water level values of the upstream side and the downstream side of the weir back water return prevention device 3 through automatic water level meters 4-4;
(A) If the backwater prevention device 3 behind the weir is a fixed structure:
when the downstream water level of the water return prevention device 3 behind the weir is lower than the upstream water level, the high-level water discharge sub-device 4-2 is selected to be closed through the automatic switch 4-3, the low-level water discharge sub-device 4-1 is started, the valve 4-1-2 is opened, and the purpose of reducing the water level behind the weir plate is achieved through the water discharge pipe 4-1-1 in a self-flowing mode;
when the water level at the downstream of the water return prevention device 3 behind the weir is higher than the water level at the upstream, the low-level water discharge sub-device 4-1 is selected to be closed through the automatic switch 4-3, the high-level water discharge sub-device 4-2 is started, the water pump 4-2-1 is started, and the purpose of reducing the water level behind the weir plate is achieved through the water discharge pipe 4-2-2 in a water pump forced discharge mode;
(B) If prevent backwater device 3 after the weir is portable structure:
when the downstream water level of the weir rear backwater prevention device 3 is lower than the upstream water level, the high-level water discharge sub-device 4-2 is selected to be closed through the automatic switch 4-3, and the weir rear backwater prevention device 3 moves upwards to be opened, so that the purpose of reducing the water level behind the weir plate is achieved in a self-flowing mode;
when the water level of the downstream of the weir back water return prevention device 3 is higher than the water level of the upstream, the weir back water return prevention device 3 is selected to be closed through the automatic switch 4-3, meanwhile, the high-position water discharge sub-device 4-2 is started, the water pump 4-2-1 is started, and the purpose of reducing the water level of the weir plate back is achieved through the water discharge pipe 4-2-2 in a water pump forced discharge mode.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, a plurality of modifications and decorations can be made, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An automatic drainage type water measuring weir structure free from environmental influence is characterized by comprising a water measuring weir body, a weir front rainproof device, a weir rear backwater prevention device and an automatic drainage device;
a weir plate is arranged in the cross section of the weir body of the water measuring weir along the water flow direction, and the weir plate divides the weir body of the water measuring weir into an upstream area of the weir plate and a downstream area of the weir plate and is used for measuring the flow of the water flow at the weir plate;
the device for preventing backwater behind the weir is positioned in the downstream area of the weir plate, and the device for preventing backwater behind the weir can be hermetically connected with the left side, the right side and the bottom of the weir body of the water measuring weir and is used for preventing the water body from recharging at high downstream water level;
the automatic water discharging device is used for discharging the water body between the weir plate and the water return preventing device behind the weir to the downstream side of the water return preventing device behind the weir, and the water level requirement between the weir plate and the water return preventing device behind the weir is maintained;
the rain-proof device in front of the weir is at least arranged in the upstream area of the weir plate and above the weir plate and is used for preventing rainfall from entering the weir body and eliminating the influence of the rainfall on the upstream water inflow.
2. The automatic environmental impact-free weir structure according to claim 1, wherein the back water-return preventing means is a fixed wall structure or a gate structure movable up and down.
3. The environmentally friendly automatic drainage weir structure of claim 1, wherein the behind-weir water return prevention device is disposed parallel to the weir plate.
4. The environmentally friendly automatic drainage type weir structure according to claim 1, 2 or 3, wherein the top elevation of the post-weir water return prevention device is greater than the maximum possible water level elevation downstream of the post-weir water return prevention device.
5. The environmentally friendly automatic water drainage weir structure according to claim 1, wherein the pre-weir flashing arrangement comprises a rain retaining substructure, a water catchment substructure and a flow directing substructure; the rain sheltering substructure is obliquely arranged in the upstream area of the weir plate and above the backwater preventing device after the weir plate reaches the weir, and the lower end of the rain sheltering substructure extends to the downstream side of the backwater preventing device after the weir; follow weir length direction is provided with the catchment substructure of ditch body structure respectively in weir both sides, the low reaches of preventing backwater device behind drainage substructure intercommunication catchment substructure to the weir, keep off rain substructure both sides and lie in the top of catchment substructure or extend to outside the catchment substructure.
6. The environmentally friendly automatic water drainage weir structure according to claim 1, wherein the automatic water drainage means comprises a low level water drainage sub-means, a high level water drainage sub-means;
the low-position drainage sub-device comprises a low-position drainage pipe and a valve arranged on the low-position drainage pipe, the low-position drainage pipe is arranged in the weir rear water return prevention device in a penetrating mode, an inlet of the low-position drainage pipe is located on the upstream side of the weir rear water return prevention device, and an outlet of the low-position drainage pipe is located on the downstream side of the weir rear water return prevention device;
the high-level water discharging sub-device comprises a high-level water discharging pipe and a water pump for driving water discharging; the water pump is connected with the high-position drain pipe, the inlet of the high-position drain pipe is located on the upstream side of the water return prevention device behind the weir, the outlet of the high-position drain pipe is located on the downstream side of the water return prevention device behind the weir, and the outlet of the high-position drain pipe is higher than the highest water level of the downstream side of the water return prevention device behind the weir.
7. The environmentally friendly automatic water drainage weir structure of claim 6, wherein the automatic water drainage device further comprises an automatic switch for controlling the switching between the low level water drainage sub-device and the high level water drainage sub-device.
8. The automatic environmental impact-free drainage weir structure according to claim 1, wherein the upstream and downstream sides of the back water-return prevention device are respectively provided with an automatic water level meter for monitoring the water level values of the upstream and downstream sides of the back water-return prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220864334.3U CN217601359U (en) | 2022-04-15 | 2022-04-15 | Automatic drainage type water measuring weir structure free from environmental influence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220864334.3U CN217601359U (en) | 2022-04-15 | 2022-04-15 | Automatic drainage type water measuring weir structure free from environmental influence |
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| Publication Number | Publication Date |
|---|---|
| CN217601359U true CN217601359U (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220864334.3U Active CN217601359U (en) | 2022-04-15 | 2022-04-15 | Automatic drainage type water measuring weir structure free from environmental influence |
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| Country | Link |
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- 2022-04-15 CN CN202220864334.3U patent/CN217601359U/en active Active
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