A measuring weir plate for measuring the flow of a measuring weir

Abstract

The present application relates to the technical fields of water measuring weir plate, and discloses a water measuring weir plate for water measuring weir flow measurement, which comprises a mounting mechanism one, a plurality of mounting mechanisms one are arranged, and the adjacent two mounting mechanisms one are clamped; a mounting mechanism two is located on one side of the mounting mechanism one; a mounting mechanism three is located on the other side of the mounting mechanism one; a positioning mechanism two is rotatably installed on the position close to the rear end of the side away from the mounting mechanism one of the mounting mechanism three; a positioning mechanism one is rotatably installed on the position close to the rear end of the side away from the mounting mechanism one of the mounting mechanism two; the inside of the mounting mechanism one, the mounting mechanism two and the mounting mechanism three are clamped with vertical plate one, vertical plate two and switching mechanism; the vertical plate one and the vertical plate two are located in front of the switching mechanism, and the vertical plate one is located in front of the vertical plate two; the present application can switch the shape among the rectangular weir, the trapezoidal weir and the triangular weir, is suitable for various environments, and is beneficial to the flow measurement of the water weir.

Description

Technical Field

[0001] This invention relates to the field of water measuring weir plate technology, and more specifically, to a water measuring weir plate for measuring the flow rate of a water measuring weir. Background Technology

[0002] A flow-measuring weir is a device that allows water to overflow a specific-shaped, thin-walled weir in an open channel, and measures the head at the top of the weir to calculate the flow rate. Flow-measuring weirs come in many shapes, commonly rectangular, trapezoidal, and triangular weirs. When a flow-measuring weir is installed in an open channel, the water flow is blocked by the weir, raising the water level and allowing it to overflow the weir. Initially, the outflow is less than the original flow in the channel. As the water level continues to rise, the outflow increases until it equals the original flow rate. The water level then stabilizes at a certain height. By measuring the water level that overflows the weir, and considering the relationship between this water level and the flow rate, the flow rate can be calculated.

[0003] Existing weir plates are typically fixed structures in practical use, which cannot be changed according to environmental requirements, resulting in significant limitations and hindering the measurement of water flow. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a measuring weir plate for measuring the flow rate of a measuring weir.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A water measuring weir plate for measuring the flow rate of a water measuring weir includes an installation mechanism 1, wherein multiple installation mechanisms 1 are provided, and two adjacent installation mechanisms 1 are snapped together.

[0007] Installation mechanism two is located on one side of installation mechanism one;

[0008] Installation mechanism three is located on the other side of installation mechanism one;

[0009] The positioning mechanism 2 is rotatably installed on the side of the installation mechanism 3 away from the installation mechanism 1, near the rear end. The positioning mechanism 1 is rotatably installed on the side of the installation mechanism 2 away from the installation mechanism 1, near the rear end. Vertical plate 1, vertical plate 2, and switching mechanism are all snapped into the interior of the installation mechanism 1, installation mechanism 2, and installation mechanism 3. Vertical plate 1 and vertical plate 2 are both located in front of the switching mechanism, and vertical plate 1 is located at the front end of vertical plate 2. Vertical plate 1 and vertical plate 2 are slidably connected. The switching mechanism is used to complete the water measuring weir shape switching operation.

[0010] As a further aspect of the present invention: the switching mechanism includes a water measuring weir plate body, the bottom of the water measuring weir plate body is provided with multiple pull ropes, the top of the water measuring weir plate body is provided with a rectangular slot, a water-blocking membrane is provided on the rectangular slot, a tension strip is provided on the upper surface of the water-blocking membrane, both ends of the tension strip extend into the interior of the water measuring weir plate body, the top of the water-blocking membrane is embedded in the tension strip, and the water-blocking membrane is provided with multiple perforated rivets, and the tension strip is provided with multiple fixing holes, with the perforated rivets and fixing holes corresponding one-to-one.

[0011] As a further embodiment of the present invention: the installation mechanism includes an installation frame, the vertical plate 1, the vertical plate 2, and the switching mechanism are all installed inside the installation frame 1, and the upper ends of the vertical plate 1, the vertical plate 2, and the switching mechanism all extend to the outside of the installation frame 1. A side plate 1 is fixedly installed on one side of the installation frame 1, a connecting plate 1 is fixedly installed on the other side of the installation frame 1, and a cover plate 1 is snapped onto the top of the installation frame 1.

[0012] As a further embodiment of the present invention: the second installation mechanism includes a second installation frame, the first vertical plate, the second vertical plate, and the switching mechanism are all installed inside the second installation frame, and the upper ends of the first vertical plate, the second vertical plate, and the switching mechanism all extend to the outside of the second installation frame. The second side plate is fixedly installed on both sides of the second installation frame, the second connecting plate is fixedly installed on the other side of the second installation frame, and the second cover plate is snapped onto the top of the second installation frame.

[0013] As a further embodiment of the present invention: the installation mechanism three includes an installation frame three, the vertical plate one, the vertical plate two, and the switching mechanism are all installed inside the installation frame three, and the upper ends of the vertical plate one, the vertical plate two, and the switching mechanism all extend to the outside of the installation frame three. Side plates three are fixedly installed on both sides of the installation frame three, and a connecting plate three is fixedly installed on the other side of the installation frame three. A cover plate three is snapped onto the top of the installation frame three.

[0014] As a further embodiment of the present invention: the positioning mechanism one and the positioning mechanism two are arranged in a mirror image. The positioning mechanism two includes a snap-fit ​​post. A fixing block is fixedly installed on one side of the snap-fit ​​post. A guide plate is fixedly installed on the side of the fixing block away from the snap-fit ​​post. A limit plate is fixedly installed on the side of the guide plate away from the fixing block.

[0015] As a further aspect of the present invention: the outer surfaces of the second side plate and the third connecting plate are provided with limiting grooves that are adapted to the snap-fit ​​post, and the snap-fit ​​post has a 0-60 degree of freedom of front-to-back rotation within the limiting groove.

[0016] As a further aspect of the present invention: the first vertical plate is provided with a plurality of through holes 1, and the second vertical plate is provided with a plurality of through holes 2.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this invention, multiple installation mechanisms are provided, and two adjacent installation mechanisms are interlocked. The number of installation mechanisms can be increased or decreased according to the width of the weir, so as to realize the application in weirs of different widths and have a better range of applications. Furthermore, individual installation mechanisms can be replaced separately, thus extending the overall service life of the invention.

[0019] When in use, this invention can be used by cooperating multiple ropes with the fixing holes and applying force, which can cause the tension strip and the water-blocking membrane to elastically deform according to the direction of the force, thereby forming water measuring weir plates of different shapes. This enables the switching mechanism to switch between rectangular weirs, trapezoidal weirs and triangular weirs, making it suitable for various environments and beneficial for the flow measurement of water weirs. Attached Figure Description

[0020] Figure 1 This is an overall front view of a water measuring weir plate for measuring the flow rate of a water measuring weir according to the present invention.

[0021] Figure 2 This is a top view of the connection of the installation mechanism 1, installation mechanism 2, installation mechanism 3, vertical plate 1, vertical plate 2, and switching mechanism in this invention;

[0022] Figure 3 This is a top view of the positioning mechanism two in this invention;

[0023] Figure 4 This is a schematic diagram of the dynamic switching mechanism in this invention;

[0024] Figure 5 This is a front view diagram showing the connection between the pull rope and the connecting hook in this invention.

[0025] In the diagram: 1. Water measuring weir plate body; 2. Water-retaining membrane; 3. Pull rope; 4. Tension strip; 5. Fixing hole; 6. Connecting hook; 7. Installation mechanism one; 8. Installation mechanism two; 9. Installation mechanism three; 10. Positioning mechanism one; 11. Positioning mechanism two; 12. Vertical plate one; 13. Vertical plate two; 14. Switching mechanism; 71. Installation frame one; 72. Cover plate one; 73. Side plate one; 74. Connecting plate one; 81. Installation frame two; 82. Cover plate two; 83. Side plate two; 84. Connecting plate two; 91. Installation frame three; 92. Cover plate three; 93. Side plate three; 94. Connecting plate three; 111. Snap-fit ​​column; 112. Fixing block; 113. Guide plate; 114. Limiting plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Reference Figure 1 - Figure 5 The following embodiments were obtained:

[0028] Example 1

[0029] A measuring weir plate for measuring the flow rate of a water measuring weir includes the following components:

[0030] Installation mechanism 1 7, multiple installation mechanisms 1 7 are provided, and two adjacent installation mechanisms 1 7 are interlocked; installation mechanism 2 8 is located on one side of installation mechanism 1 7; installation mechanism 3 9 is located on the other side of installation mechanism 1 7; installation mechanisms 1 7, 2 8, and 3 9 provide installation positions for vertical plate 1 12, vertical plate 2 13, and switching mechanism 14. Since there are multiple installation mechanisms 1 7 and two adjacent installation mechanisms 1 7 are interlocked, the number of installation mechanisms 1 7 can be increased or decreased according to the width of the weir, so as to realize the application in weirs of different widths, which has a better applicability range. Furthermore, individual installation mechanisms 1 7, 2 8, and 3 9 can be replaced separately, extending the overall service life of the invention.

[0031] A positioning mechanism 2 11 is rotatably installed on the side of installation mechanism 3 9 away from installation mechanism 1 7, near the rear end. A positioning mechanism 1 10 is rotatably installed on the side of installation mechanism 2 8 away from installation mechanism 1 7, installation mechanism 2 8, and installation mechanism 3 9. Vertical plates 1 12 and 2 13, and a switching mechanism 14 are all snapped together inside installation mechanisms 1 7, 2 8, and 3 9. Vertical plates 1 12 and 2 13 are both located in front of the switching mechanism 14, with vertical plate 1 12 located at the front end of vertical plate 2 13. Vertical plates 1 12 and 2 13 are slidably connected. The switching mechanism 14 is used to complete the water measuring weir shape switching operation. Vertical plate 1 12 has multiple through holes 1, and vertical plate 2 13 has multiple through holes 2. Water flows out through through holes 1 and through holes 2, which helps to slow down the water flow velocity and prevent the rapid water flow from destroying the downstream embankment.

[0032] The switching mechanism 14 includes a water measuring weir plate body 1. The bottom of the water measuring weir plate body 1 is provided with multiple pull ropes 3, and the top of the water measuring weir plate body 1 is provided with a rectangular slot. A water-blocking membrane 2 is provided on the rectangular slot. A tension strip 4 is provided on the upper surface of the water-blocking membrane 2. Both ends of the tension strip 4 extend into the interior of the water measuring weir plate body 1. The top of the water-blocking membrane 2 is embedded in the tension strip 4, and the water-blocking membrane 2 is provided with multiple perforated rivets. The tension strip 4 is provided with multiple fixing holes 5. The perforated rivets and fixing holes 5 are in a one-to-one correspondence. The switching mechanism 14 can perform water measuring weir shape switching operations, which will be described in detail in Embodiment 2.

[0033] The installation mechanism 1 7 includes an installation frame 1 71, vertical plate 1 12, vertical plate 2 13, and switching mechanism 14, all of which are installed inside the installation frame 1 71. The upper ends of vertical plate 1 12, vertical plate 2 13, and switching mechanism 14 extend to the outside of the installation frame 1 71. A side plate 1 73 is fixedly installed on one side of the installation frame 1 71, and a connecting plate 1 74 is fixedly installed on the other side of the installation frame 1 71. A cover plate 1 72 is snapped onto the top of the installation frame 1 71. The side plate 1 73 is snapped onto the connecting plate 1 74 in the adjacent installation mechanism 1 7, making the connection between the two adjacent installation mechanisms 1 7 more secure. The cover plate 1 72 has three functions: first, to better fix vertical plate 1 12, vertical plate 2 13, and switching mechanism 14 to avoid positional deviation; second, to prevent accidental activation that could cause the shape of the switching mechanism 14 to deviate from the preset shape; and third, to provide sufficient space for personnel to walk and ensure stability when personnel walk.

[0034] The second mounting mechanism 8 includes a second mounting frame 81. Vertical plate 12, vertical plate 2 13, and switching mechanism 14 are all installed inside the second mounting frame 81, and the upper ends of vertical plate 12, vertical plate 2 13, and switching mechanism 14 all extend to the outside of the second mounting frame 81. Side plates 2 83 are fixedly installed on both sides of the second mounting frame 81, and a connecting plate 2 84 is fixedly installed on the other side of the second mounting frame 81. A cover plate 2 82 is snapped onto the top of the second mounting frame 81. The connecting plate 2 84 is snapped onto the side plate 1 73 in the adjacent first mounting mechanism 7, and the side plate 2 83 is snapped onto the snap-fit ​​post 111 in the first positioning mechanism 10, thereby improving the overall stability and reliability of the invention.

[0035] The mounting mechanism 39 includes a mounting frame 391. Vertical plate 12, vertical plate 2, and switching mechanism 14 are all installed inside the mounting frame 391, and the upper ends of vertical plate 12, vertical plate 2, and switching mechanism 14 all extend to the outside of the mounting frame 391. Side plates 393 are fixedly installed on both sides of the mounting frame 391, and a connecting plate 394 is fixedly installed on the other side of the mounting frame 391. A cover plate 392 is snapped onto the top of the mounting frame 391. The side plates 393 are snapped onto the connecting plate 74 in the adjacent mounting mechanism 17, and the connecting plate 394 is snapped onto the snap-on post 111 in the positioning mechanism 21, thereby improving the overall stability and reliability of the invention.

[0036] Positioning mechanism 10 and positioning mechanism 21 are arranged in a mirror image. Positioning mechanism 21 includes a snap-fit ​​post 111. A fixing block 112 is fixedly installed on one side of the snap-fit ​​post 111. A guide plate 113 is fixedly installed on the side of the fixing block 112 away from the snap-fit ​​post 111. A limiting plate 114 is fixedly installed on the side of the guide plate 113 away from the fixing block 112. In use, the limiting plates 114 in positioning mechanism 10 and positioning mechanism 211 are respectively connected to both sides of the weir and can be fixed by cement lining to ensure the overall safety, reliability and stability of the invention. In addition, the outer surfaces of side plate 283 and connecting plate 394 are provided with limiting grooves that are adapted to snap-fit ​​post 111. Snap-fit ​​post 111 has a 0-60 degree of freedom of forward and backward rotation in the limiting groove. Therefore, a flow-guiding angle can be set between positioning mechanism 21 and installation mechanism 39, and between positioning mechanism 10 and installation mechanism 28, so that the water flow is more concentrated, the impact on both sides of the weir is reduced, and the service life of the invention is extended.

[0037] Example 2

[0038] Furthermore, existing water measuring weirs can be classified into rectangular weirs, trapezoidal weirs, and triangular weirs according to the shape of their upper openings, but they cannot achieve shape switching. The switching mechanism 14 in this invention includes a water measuring weir body 1, which is rectangular in shape and composed of two layers of 2mm thick 304 stainless steel. Multiple pull ropes 3 are provided at the bottom of the water measuring weir body 1, and a rectangular slot is provided at the top. A water-retaining membrane 2 is provided on the rectangular slot. The water-retaining membrane 2 has thicker edges. After the water measuring weir body 1 is installed, the water-retaining membrane 2 is held in place by the two layers of water measuring weirs. The groove is fixed to block water at the rectangular groove opening. The upper surface of the water-blocking membrane 2 is provided with a tension strip 4. The tension strip 4 has a double-layer structure, with both ends clamped into the double-layer water measuring weir plate body 1 and fixed between the notches of the water measuring weir plate body 1 by screws. The top of the water-blocking membrane 2 is embedded in the double-layer structure of the tension strip 4 and fixed by 5 rivets with holes. The tension strip 4 can undergo a large range of deformation under action. The tension strip 4 has fixing holes 5. The above-mentioned 5 rivets with holes are installed in the fixing holes 5 respectively. Multiple pull ropes 3 can be threaded through the fixing holes 5 to facilitate the application of force to the tension strip 4.

[0039] The water-blocking membrane 2 is made of a flexible material with tension, such as a rubber membrane, to ensure that the water-blocking membrane 2 can change shape and has good impact resistance. There are five pull ropes 3, which are distributed in a straight line at equal intervals. By connecting the top of the pull rope 3 to different rivets with holes and then applying force, the water-blocking membrane 2 can present different water-blocking structures.

[0040] There are five fixing holes 5, which are symmetrically distributed in a straight line, making it easy to use multiple pull ropes 3 to stretch the tension strip 4 in different directions.

[0041] Each of the multiple pull ropes 3 has a connecting hook 6 at its top. The connecting hook 6 is a self-locking hook that can be connected to a rivet with a hole to fix the top of the pull rope 3.

[0042] Form 1: By connecting the first pull rope 3 from left to right to the first perforated rivet, and the fifth pull rope 3 to the fifth perforated rivet, and pulling down the first pull rope 3 and the fifth pull rope 3, the tension belt 4 and the water-retaining membrane 2 are elastically deformed, thereby forming a rectangular weir.

[0043] Form 2: By connecting the second pull rope 3 from left to right to the second perforated rivet, and the fourth pull rope 3 to the fourth perforated rivet, and pulling down the second pull rope 3 and the fourth pull rope 3, the tension belt 4 and the water-retaining membrane 2 are elastically deformed, thereby forming a trapezoidal weir.

[0044] Form 3: By connecting the third rope 3 from left to right to the third rivet with a hole, and pulling down the third rope 3, the tension strip 4 and the water-blocking membrane 2 are elastically deformed, thus forming a triangular weir.

[0045] Therefore, the present invention can use multiple pull ropes 3 to cooperate with the fixing holes 5 and apply force to make the tension strip 4 and the water-blocking membrane 2 elastically deform according to the direction of the force, thereby forming water measuring weir plates of different shapes, realizing the dynamic switching of the water measuring weir plate, i.e., the switching mechanism 14, which is suitable for various environments and is beneficial to the flow measurement of the weir.

[0046] Example 3

[0047] Furthermore, the square structure of the guide plate 113 in the figure is replaced with an arc-shaped structure. The arc of the guide plate 113 facilitates the convergence of water flow, which further reduces the impact force of the water flow to a certain extent and extends the service life of the invention.

[0048] Example 4

[0049] In practical applications, adjustment mechanisms for the height of vertical plate 12 or vertical plate 23 can be respectively set in installation mechanism 1 7, installation mechanism 2 8, and installation mechanism 3 9. By controlling the overlapping area of ​​through hole 1 and through hole 2 through the adjustment mechanism, the water flow rate per unit time flowing downstream can be changed, providing users with more choices. The adjustment mechanism is a prior art that is well known to those skilled in the art and can be conceived. When selecting, it can play the same role as in this invention, and will not be described in detail here.

[0050] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A measuring weir plate for measuring the flow rate of a measuring weir, characterized in that, include: Installation mechanism 1 (7), wherein multiple installation mechanisms 1 (7) are provided, and two adjacent installation mechanisms 1 (7) are snapped together; Installation mechanism two (8) is located on one side of installation mechanism one (7); Installation mechanism three (9) is located on the other side of installation mechanism one (7); The third installation mechanism (9) is rotatably installed with a second positioning mechanism (11) near the rear end on the side away from the first installation mechanism (7). The second installation mechanism (8) is rotatably installed with a first positioning mechanism (10) near the rear end on the side away from the first installation mechanism (7). The first installation mechanism (7), the second installation mechanism (8), and the third installation mechanism (9) are all fitted with a first vertical plate (12), a second vertical plate (13), and a switching mechanism (14). The first vertical plate (12) and the second vertical plate (13) are both located in front of the switching mechanism (14), and the first vertical plate (12) is located at the front end of the second vertical plate (13). The first vertical plate (12) and the second vertical plate (13) are slidably connected. The switching mechanism (14) is used to complete the water measuring weir shape switching operation. The switching mechanism (14) includes a water measuring weir plate body (1). The bottom of the water measuring weir plate body (1) is provided with multiple pull ropes (3). The top of the water measuring weir plate body (1) is provided with a rectangular slot. A water-blocking membrane (2) is provided on the rectangular slot. A tension strip (4) is provided on the upper surface of the water-blocking membrane (2). Both ends of the tension strip (4) extend into the interior of the water measuring weir plate body (1). The top of the water-blocking membrane (2) is embedded in the tension strip (4). A plurality of perforated rivets are provided on the water-blocking membrane (2). A plurality of fixing holes (5) are opened on the tension strip (4). The perforated rivets and the fixing holes (5) are in a one-to-one correspondence.

2. A measuring weir plate for measuring the flow rate of a measuring weir according to claim 1, characterized in that, The installation mechanism 1 (7) includes an installation frame 1 (71). The vertical plate 1 (12), vertical plate 2 (13), and switching mechanism (14) are all installed inside the installation frame 1 (71). The upper ends of the vertical plate 1 (12), vertical plate 2 (13), and switching mechanism (14) all extend to the outside of the installation frame 1 (71). A side plate 1 (73) is fixedly installed on one side of the installation frame 1 (71), and a connecting plate 1 (74) is fixedly installed on the other side of the installation frame 1 (71). A cover plate 1 (72) is snapped onto the top of the installation frame 1 (71).

3. A measuring weir plate for measuring the flow rate of a measuring weir according to claim 2, characterized in that, The second installation mechanism (8) includes a second installation frame (81). The first vertical plate (12), the second vertical plate (13), and the switching mechanism (14) are all installed inside the second installation frame (81). The upper ends of the first vertical plate (12), the second vertical plate (13), and the switching mechanism (14) all extend to the outside of the second installation frame (81). The second side plate (83) is fixedly installed on both sides of the second installation frame (81). The second connecting plate (84) is fixedly installed on the other side of the second installation frame (81). The second cover plate (82) is snapped onto the top of the second installation frame (81).

4. A measuring weir plate for measuring the flow rate of a measuring weir according to claim 3, characterized in that, The installation mechanism three (9) includes an installation frame three (91). The vertical plate one (12), the vertical plate two (13), and the switching mechanism (14) are all installed inside the installation frame three (91), and the upper ends of the vertical plate one (12), the vertical plate two (13), and the switching mechanism (14) all extend to the outside of the installation frame three (91). Side plates three (93) are fixedly installed on both sides of the installation frame three (91), and a connecting plate three (94) is fixedly installed on the other side of the installation frame three (91). A cover plate three (92) is snapped onto the top of the installation frame three (91).

5. A measuring weir plate for measuring the flow rate of a measuring weir according to claim 1, characterized in that, The positioning mechanism one (10) and the positioning mechanism two (11) are arranged in a mirror image. The positioning mechanism two (11) includes a snap-fit ​​post (111). A fixing block (112) is fixedly installed on one side of the snap-fit ​​post (111). A guide plate (113) is fixedly installed on the side of the fixing block (112) away from the snap-fit ​​post (111). A limit plate (114) is fixedly installed on the side of the guide plate (113) away from the fixing block (112).

6. A measuring weir plate for measuring the flow rate of a measuring weir according to claim 4, characterized in that, The outer surfaces of the second side plate (83) and the third connecting plate (94) are provided with limiting grooves that are compatible with the snap-fit ​​post (111).

7. A measuring weir plate for measuring the flow rate of a measuring weir according to claim 1, characterized in that, The vertical plate one (12) has multiple through holes one, and the vertical plate two (13) has multiple through holes two.

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