CN219265451U - Portable open channel flowmeter calibrating device - Google Patents

Abstract

The utility model provides a portable open channel flow meter verification device, which belongs to the technical field of open channel flow detection. The utility model comprises a bottom plate, an installation box, a rotating rod, a second internal thread pipe and a driving mechanism. The lower side of the bottom plate is provided with a fixed strut and two movable struts. The lower end of the rotating rod is vertically fixed on the bottom plate, and the upper end of the rotating rod is connected to the installation box in a rotating manner. The rotating rod is provided with two second convex edges, and a second external thread is arranged between the two second convex edges. The threaded pipe is threadedly connected to the rotating rod. A reflection plate is fixed horizontally on the outside of the second internal thread pipe. Two sleeves are vertically penetrated on the reflection plate. The movable support rod extends upwards through the corresponding sleeves and ends A horizontal rod is arranged on the top, and the driving mechanism can drive the rotating rod to rotate. The utility model can realize the flow measurement under the condition of no water in the open channel, and quickly complete the verification of the open channel flow meter.

Description

A portable open channel flowmeter verification device

technical field

The utility model belongs to the technical field of open channel flow detection technology and relates to a portable open channel flowmeter verification device.

Background technique

Since the ultra-declarative canal flowmeter adopts a non-contact measurement method, it is widely used in fields such as agricultural irrigation water measurement, river water monitoring, and enterprise sewage discharge monitoring.

Under the control of the microcomputer, the ultra-declarative channel flowmeter transmits and receives ultrasonic waves, and calculates the distance between the open channel flowmeter and the measured liquid surface according to the transmission time, so as to obtain the liquid level height, combined with the geometric dimensions of the standard weir and flume, slope coefficient, and channel accuracy , hydraulic ramp, and the correction coefficient of the vertical plane of flow velocity, and then the flow rate is obtained through the calculation of the processor inside the instrument. Since the measurement accuracy of the ultra-declared canal flowmeter depends on the accuracy of the liquid level measurement, referring to the existing patent CN201720484868.2, the liquid level gauge is used to measure the liquid level height, and the three rows of flow holes are respectively arranged on the water facing surface of the energy dissipation cylinder and On both sides of the water-facing surface, adjust the height of the energy dissipation cylinder so that the liquid level is in the middle of the two adjacent flow holes, so that the measured liquid level is the same as the actual liquid level, but in the actual detection process, there are Difficult water flow control, fluctuations in the liquid level, and uneven heights at the bottom of the channel affect the detection accuracy of open channel flowmeters. In addition, if the amount of water flowing through the open channel is insufficient, it is necessary to wait for water storage, which prolongs the detection time.

Utility model content

The purpose of this utility model is to solve the above-mentioned problems in the existing technology, and propose a portable open channel flowmeter verification device, which can realize flow detection when there is no water in the open channel, quickly complete the verification of the open channel flowmeter, and improve the detection accuracy.

The purpose of this utility model can be achieved through the following technical solutions:

A portable open channel flowmeter verification device, including a base plate, the lower side of the base plate is provided with a fixed support rod and two movable support rods;

An installation box, a fixed plate is vertically provided on the bottom plate, the installation box is fixed on the top of the fixed plate, and the side edge of the fixed plate is marked with a scale along the length direction;

Rotating rod, the lower end of the rotating rod is vertically rotated and arranged on the base plate, the upper end of the rotating rod is connected with the installation box in rotation, the rotating rod is provided with two second convex edges, and the two second convex edges A second external thread is provided between the edges;

The second internally threaded pipe, the second internally threaded pipe is threadedly connected to the rotating rod through the second external thread, the outer side of the second internally threaded pipe is horizontally fixed with a reflective plate, and the reflective plate vertically runs through the There are two sleeves, and the two movable struts correspond to the two sleeves one by one, and the movable struts extend upwards through the corresponding sleeves and are provided with horizontal rods at the ends;

A driving mechanism, the driving mechanism is arranged in the installation box, and the driving mechanism can drive the rotating rod to rotate.

Preferably, the drive mechanism includes:

For the first gear, an installation cavity is provided in the installation box, the upper end of the rotating rod extends into the installation cavity and the end is coaxially fixed with the first gear;

A motor, the motor is fixed in the installation cavity, a second gear is fixed on the output shaft of the motor, and the second gear is engaged with the first gear.

Preferably, a chute hole is opened on the fixed plate along the length direction, and an extension rod is provided on a side of the reflection plate close to the chute hole, and the extension rod passes through the chute hole and extends to the outside of the fixed plate.

Preferably, the movable support rod is provided with two first protruding edges, a first external thread is provided between the two first protruding edges, and two first internal threads are vertically penetrating through the bottom plate. There is a one-to-one correspondence between the two first internally threaded pipes and the two movable struts, and the movable struts are screwed to the corresponding first internally threaded pipes through the first external thread.

Preferably, a level is provided in the middle of the reflecting plate.

Preferably, the outer end of the extension rod passing through the chute hole is vertically fixed with a scale rod, the outside of the installation box is provided with a guide plate, the guide plate is provided with a guide hole, and the scale rod extends upwards To pass through the guide hole and the end is provided with a top plate.

Preferably, the upper end of the rotating knob extends out of the installation cavity to above the installation box, and a handwheel is provided at the end.

Compared with the prior art, the utility model has the following advantages:

1. Place the verification device at the bottom of the open channel, and drive the rotating rod to rotate through the driving mechanism, so that the second internal thread pipe and the reflecting plate will rotate accordingly. Since the reflecting plate is restricted by two movable struts, it can move up and down. Using the reflecting plate To simulate different liquid level heights, avoid unstable water flow or insufficient water, so that the super-declarative channel flowmeter can quickly detect different liquid level heights, and then use the measured flow rate of the super-declarative channel flowmeter and the actual height of the reflector to calculate it Compared with the standard flow rate, the verification of the ultra-declared canal flowmeter is completed, the operation is simple, and the detection accuracy and detection efficiency are improved;

2. When the bottom of the open channel is not high or low, you can change the length of the movable strut located under the bottom plate by turning the horizontal rods on the two movable struts, adjust the levelness of the bottom plate and the reflective plate, and observe whether the reflective plate is level through the spirit level. Ensure that the reflector is adjusted in place to make the measurement of the ultra-declared channel flowmeter more accurate;

3. In the initial state, when the second inner threaded tube on the reflector touches the second convex edge below the rotating rod, the scale on which the scale rod stretches out above the guide plate is zero, and the motor drives the rotating rod to rotate, so that the second inner thread The threaded tube and the reflector move upwards, and the scale rod moves up accordingly. At this time, the scale indicated by the scale rod and the side of the guide plate is the rising distance of the reflector. The inspector can adjust the height of the reflector in real time by controlling the motor, which is easy to operate. ;In addition, when performing multi-height measurement and comparison, the inspector can stand on the edge of the open channel and read the height of the reflector directly and continuously, avoiding the need to lift the entire device upwards multiple times to read the height of the reflector from the scale on the fixed plate The trouble, greatly improving the detection efficiency.

Description of drawings

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

Fig. 2 is the sectional view of A-A place among Fig. 1;

Fig. 3 is the sectional view of B-B place among Fig. 1;

Fig. 4 is a partial enlarged view of place C in Fig. 1;

Fig. 5 is a schematic diagram of the upward movement of the reflector;

Fig. 6 is the sectional view of D-D place among Fig. 5;

Fig. 7 is a working schematic diagram of the utility model.

In the figure: 1, bottom plate; 11, first internal thread pipe; 12, fixed strut; 13, fixed plate; 131, chute hole; 2, movable strut; 21, first convex edge; 22, first outer Thread; 23, casing; 24, horizontal rod; 3, rotating rod; 31, second external thread; 32, second internal thread pipe; 33, second convex edge; 34, first gear; 35, handwheel; 4. Installation box; 41. Installation chamber; 42. Motor; 421. Second gear; 43. Battery; 5. Reflector; 51. Extension rod; 52. Scale rod; 53. Top plate; Guide hole; 7. Spirit level; 8. Open channel.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Embodiment one:

As shown in FIGS. 1-4 , a portable open channel flowmeter verification device includes a bottom plate 1 , an installation box 4 , a rotating rod 3 , a second inner threaded pipe 32 , a first gear 34 and a motor 42 .

The lower side of the base plate 1 is vertically provided with a fixed strut 12 and two movable struts 2, preferably, the lower ends of the fixed strut 12 and the two movable struts 2 are spherical, and the fixed strut The length of the rod 12 is between 1cm-2cm.

The bottom plate 1 is vertically provided with a fixed plate 13, the installation box 4 is fixed on the top of the fixed plate 13, the fixed plate 13 is provided with a chute hole 131 along the length direction, the side of the fixed plate 13 Scale marks are provided along the length direction of the edge, and the scale at the bottom is the length distance from this position to the lower end of the fixed Cheng An 12.

The lower end of the rotating rod 3 is vertically rotated and arranged on the base plate 1, the upper end of the rotating rod 3 is connected to the installation box 4 in rotation, the rotating rod 3 and the fixed support rod 12 are coaxial up and down, and the upper end of the rotating rod 3 Two second protruding edges 33 are provided, and a second external thread 31 is provided between the two second protruding edges 33 .

The second internally threaded pipe 32 is threadedly connected to the rotating rod 3 through the second externally threaded pipe 31. A reflective plate 5 is horizontally fixed on the outside of the second internally threaded pipe 32. The reflective plate 5 vertically penetrates the set There are two sleeves 23, the two movable struts 2 correspond to the two sleeves 23 one by one, the movable struts 2 extend upwards through the corresponding sleeves 23 and the ends are provided with horizontal rods 24, The side of the reflector 5 close to the chute hole 131 is provided with an extension rod 51, the extension rod 51 passes through the chute hole 131 and extends to the outside of the fixed plate 13, the upper side of the extension rod 51 is in contact with the reflection plate 5 The top side is even.

The installation box 4 is provided with an installation cavity 41 , the upper end of the rotating rod 3 extends into the installation cavity 41 and the end is coaxially connected with the first gear 34 .

The motor 42 is fixed in the installation cavity 41, the output shaft of the motor 42 is fixed with a second gear 421, the second gear 421 is meshed with the first gear 34, and the installation cavity 41 is provided with The battery 43 is electrically connected to the motor 42 . Preferably, the second gear 421 is smaller than the first gear 34 , and the cooperation between the first gear 34 and the second gear 421 can reduce the speed of the rotating rod 3 .

The ultra-declarative channel flowmeter includes a probe and an instrument controller, and the probe is installed above the open channel 8 through a bracket.

Place the verification device at the bottom of the open channel 8, and start the motor 42 to drive the rotating rod 3 to rotate, so that the second internal thread pipe 32 and the reflector 5 rotate accordingly. Since the reflector 5 is restricted by the two movable struts 2, it can move up and down , using the lifting height of the reflector 5 to simulate the liquid level at different heights in the open channel 8, so that the ultra-declarative channel flowmeter can measure the distance between the probe and the reflector 5, and then subtract the distance between the probe and the bottom of the open channel 8 from the probe to The distance between the reflectors 5 is the liquid level simulated by the launcher 5. In addition, the actual height of the extension rod 51 and the reflector 5 can be directly read from the scale marks on the fixed plate 13. Finally, the super-declaration channel flowmeter can be obtained. The measured flow rate is compared with the standard flow rate calculated by the actual height of the reflecting plate 5, and the verification of the super-declared channel flowmeter is completed when there is no water in the open channel 8, the operation is simple, and at the same time, the situation of unstable water flow or insufficient water volume is avoided, and the improvement is improved. Detection accuracy and detection efficiency.

Embodiment two:

As shown in FIG. 1 , in this embodiment, the movable strut 2 is provided with two first protruding edges 21 , and a first external thread 22 is provided between the two first protruding edges 21 . Two first internally threaded pipes 11 are vertically penetrated on the bottom plate 1, and the two first internally threaded pipes 11 correspond to the two movable struts 2 one by one, and the movable struts 2 pass through the first external thread 22 It is screwed on the corresponding first inner threaded pipe 11, and a level 7 is provided in the middle of the reflection plate 5, preferably, the level 7 is a bubble level.

When the bottom of the open channel 8 is uneven, the length of the movable strut 2 below the base plate 1 can be changed by rotating the horizontal bar 24 on the two movable struts 2, and the levelness of the base plate 1 and the reflecting plate 5 can be adjusted. Observe whether the reflection plate is level, and ensure that the reflection plate 5 is adjusted in place to make the measurement of the ultra-clean channel flowmeter more accurate; in addition, since the upper end of the movable support rod 2 extends above the reflection plate 5, it is convenient for the inspector to stand on the side of the open channel 8 and directly Turning the horizontal bar 24 just can adjust the levelness of the bottom plate 1 and the reflection plate 5, the structure is simple, and the operation is convenient.

Embodiment three:

As shown in Figures 5-7, in this embodiment, the outer end of the extension rod 51 passing through the chute hole 131 is vertically fixed with a scale rod 52, and the outside of the installation box 4 is provided with a guide plate 6, The guide plate 6 is provided with a guide hole 61 , the scale rod 52 extends upwards to pass through the guide hole 61 and has a top plate 53 at its end.

In the initial state, when the second internally threaded tube 32 on the reflector 5 contacts the second convex edge 33 located below the rotating rod 3, the scale rod 52 stretches out above the guide plate 6 to zero, and the rotating rod 3 is driven by the motor 42 Rotate to make the second internally threaded pipe 32 and the reflector 5 move upwards, and the scale rod 52 moves upwards. At this time, the scale indicated by the scale rod 52 and the upper side of the guide plate 6 is the rising distance of the reflector 5. The motor 42 is used to adjust the height position of the reflector 5 in real time, and the operation is simple; in addition, when performing multi-height measurement and comparison, the inspector can stand on the side of the open channel 8 and directly read the height of the reflector 5 continuously, avoiding the need to go up multiple times. Lifting the whole device to read the height of the reflecting plate 5 from the scale on the fixed plate 13 is troublesome, which greatly improves the detection efficiency.

Preferably, the upper end of the rotating rotor 3 passes through the installation cavity 41 and extends above the installation box 4 , and a hand wheel 35 is provided at the end. When the accumulator 43 has no electricity or the motor 42 is damaged, the turning bar 3 can be driven to rotate by turning the handwheel 35 to realize manual lifting of the reflector 5; in addition, the height of the reflector 5 can be fine-tuned by manually turning the handwheel 35 to improve detection accuracy.

Claims (7)

1. The portable open channel flowmeter calibrating device is characterized by comprising a bottom plate (1), wherein a fixed stay bar (12) and two movable stay bars (2) are arranged on the lower side surface of the bottom plate (1);

the mounting box (4) is vertically arranged on the bottom plate (1), the mounting box (4) is fixedly arranged at the top of the fixing plate (13), and scale marks are arranged on the side edges of the fixing plate (13) along the length direction;

the lower end of the rotating rod (3) is vertically arranged on the bottom plate (1) in a rotating mode, the upper end of the rotating rod (3) is rotationally connected with the mounting box (4), two second convex edges (33) are arranged on the rotating rod (3), and second external threads (31) are arranged between the two second convex edges (33);

the second internal thread pipe (32), second internal thread pipe (32) is on dwang (3) through second external thread (31) threaded connection, reflecting plate (5) has been set firmly to the outside level of second internal thread pipe (32), vertically run through on reflecting plate (5) and be equipped with two sleeve pipes (23), two movable vaulting pole (2) and two sleeve pipes (23) one-to-one, movable vaulting pole (2) upwards extends and passes corresponding sleeve pipe (23) and the tip is equipped with horizon bar (24);

the driving mechanism is arranged in the mounting box (4) and can drive the rotating rod (3) to rotate.

2. The portable open channel flow meter verification device of claim 1, wherein said drive mechanism comprises:

the first gear (34) is internally provided with a mounting cavity (41), the upper end of the rotating rod (3) extends into the mounting cavity (41), and the end part of the rotating rod is coaxially and fixedly connected with the first gear (34);

the motor (42), motor (42) are fixed in installation cavity (41), second gear (421) has been set firmly on the output shaft of motor (42), second gear (421) and first gear (34) meshing are connected.

3. The portable open channel flowmeter calibrating device according to claim 2, wherein the fixing plate (13) is provided with a sliding slot hole (131) along the length direction, one side of the reflecting plate (5) close to the sliding slot hole (131) is provided with an extension rod (51), and the extension rod (51) penetrates through the sliding slot hole (131) to extend to the outer side of the fixing plate (13).

4. A portable open channel flowmeter calibrating device according to claim 3, wherein two first protruding edges (21) are arranged on the movable supporting rod (2), first external threads (22) are arranged between the two first protruding edges (21), two first internal thread pipes (11) are vertically and penetratingly arranged on the bottom plate (1), the two first internal thread pipes (11) are in one-to-one correspondence with the two movable supporting rods (2), and the movable supporting rods (2) are in threaded connection with the corresponding first internal thread pipes (11) through the first external threads (22).

5. The portable open channel flowmeter assay device of claim 4, wherein a level meter (7) is provided in the middle of the reflector plate (5).

6. A portable open channel flowmeter calibrating device according to claim 3, characterized in that the outer end of the extension rod (51) penetrating through the slide slot hole (131) is vertically fixed with a scale rod (52), the outer side of the mounting box (4) is provided with a guide plate (6), the guide plate (6) is provided with a guide hole (61), the scale rod (52) extends upwards to penetrate through the guide hole (61) and the end part is provided with a top plate (53).

7. The portable open channel flowmeter verification device according to claim 2, wherein the upper end of the rotating rod (3) extends out of the mounting cavity (41) to above the mounting box (4) and is provided with a hand wheel (35) at the end.

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