CN213021788U - Float-type liquid level measuring instrument calibration device - Google Patents
Float-type liquid level measuring instrument calibration device Download PDFInfo
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- CN213021788U CN213021788U CN202021714539.0U CN202021714539U CN213021788U CN 213021788 U CN213021788 U CN 213021788U CN 202021714539 U CN202021714539 U CN 202021714539U CN 213021788 U CN213021788 U CN 213021788U
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Abstract
The utility model discloses a float-type liquid level measuring instrument calibration device, which comprises a water injection pipe communicated to a measuring cylinder, wherein one end of the water injection pipe is provided with a drainage device used for draining calibration liquid to the water injection pipe, the other end of the water injection pipe is provided with a connector used for connecting a calibration pipeline of the float-type liquid level measuring instrument, and at least one water injection regulating valve used for controlling the water inflow entering the measuring cylinder is arranged between the drainage device and the connector; the connector is equipped with the clamp with the one end of buoy type level measurement instrument measuring cylinder check-up line connection, and the connector passes through clamp and buoy type level measurement instrument measuring cylinder check-up line fixed connection. The utility model discloses a check-up pipeline of the different diameters of clamp adaptation for avoid appearing the connector leak, the water injection pipeline obscission, simultaneously through the water injection governing valve control get into the water yield in the measuring cylinder, avoid appearing the water injection volume too much in the check-up process, need the phenomenon of repeated drainage water injection, make check-up work efficiency higher, the check-up precision is better.
Description
Technical Field
The utility model relates to an instrument calibration field especially relates to a buoy type liquid level measurement instrument calibration equipment.
Background
The nuclear power plant thermal process control system is provided with a large number of float type liquid level transmitters and liquid level switches and is used for monitoring the change of the liquid level in real time, the measured liquid level value is fed back to an upstream control system to send an opening signal of a water supply and drainage regulating valve, and when the liquid level reaches an equipment protection threshold value (a liquid level switch action value), a protection system is triggered to act.
Due to the water level control functions of the important systems and the actions of the protection systems, according to the maintenance outline of the power plant, the liquid level measuring instruments need to be checked regularly to ensure that the measuring accuracy meets the standard. No special checking tool is provided in the actual work, and water injection inspection is carried out only by temporarily splicing the plastic hose and the small manual pressurizing pump. The temporarily spliced tool has simple and crude functions, a special connecting interface is not arranged between the temporarily spliced tool and a field instrument check pipeline, and the connecting part often falls off and leaks water along with the rise of water pressure in the water injection process; meanwhile, in the water injection checking process, because the manual pressurizing pump cannot accurately control the water injection amount, the situation that the water injection amount is too much and water injection is needed after repeated water drainage frequently occurs, the time consumption is long, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's defect, a buoy type level measurement instrument calibration equipment is provided.
The utility model provides a technical scheme that its technical problem adopted is:
the float-type liquid level measuring instrument calibration device comprises a water injection pipe communicated to an instrument measuring cylinder, wherein one end of the water injection pipe is provided with a drainage device used for draining calibration liquid to the water injection pipe, the other end of the water injection pipe is provided with a connector used for connecting a calibration pipeline of the instrument measuring cylinder, at least one water injection regulating valve used for controlling water inflow entering the instrument measuring cylinder is further arranged between the drainage device and the connector, and the water injection regulating valve is communicated with the water injection pipe;
be equipped with on the connector be used for with check-up pipeline fixed connection's clamp, the connector passes through the clamp with instrument measuring cylinder check-up pipeline fixed connection, the clamp is including being equipped with open-ended elastic ring, the open-ended both sides are equipped with connection lug piece respectively, the clamp is still including being used for adjusting the adjusting device of opening size.
Preferably, the adjusting device comprises a connecting screw inserted between two adjacent connecting lug plates, one end of the connecting screw is provided with a fastening nut, and the other end of the connecting screw is provided with an adjusting mechanism for adjusting the size of an opening between the connecting lug plates;
the inner wall of the elastic ring is also provided with an elastic cushion for strengthening sealing and preventing water leakage.
Preferably, the water injection regulating valve with still be equipped with between the connector and be used for carminative air discharge ball, the air discharge ball is close to buoy type level meter calibration pipeline, and with the water injection pipe intercommunication sets up.
Preferably, the float-type liquid level measuring instrument calibration device further comprises a drain pipe for discharging the instrument measuring cylinder and the calibration liquid in the float-type liquid level measuring instrument calibration device, and the drain pipe is communicated with the water injection pipe.
Preferably, the water injection pipe with the drain pipe passes through the three way connection intercommunication, the three way connection includes first joint, second joint, the third joint of mutual intercommunication, the water injection pipe include with the first water injection pipe of first joint intercommunication, and with the second water injection pipe of second joint intercommunication, the third joint with the drain pipe intercommunication.
Preferably, the drainage device is communicated with the first water injection pipe; the connector with the second water injection pipe intercommunication.
Preferably, the outer wall of the first water filling pipe is provided with scales for displaying the height of the water level.
Preferably, the drain pipe is further provided with a drain regulating valve for regulating the amount of water discharged, and the drain regulating valve is arranged in the middle of the drain pipe.
Preferably, the drainage device is a water injection funnel, and the water injection funnel is communicated with the water injection pipe.
Preferably, a fixing device for fixing the water injection funnel at a position higher than the highest water level of the float-type liquid level measuring instrument is further arranged at the communication position of the water injection funnel and the water injection pipe;
the fixing device is a suspension rope.
The utility model discloses following beneficial effect has: through the instrument measuring tube calibration pipeline of the buoy type liquid level measuring instrument of different diameters of clamp adaptation for avoid appearing the connector and leaking, the water injection pipeline phenomenon that drops, through the water injection speed of water injection regulating valve control entering in the buoy type liquid level measuring instrument simultaneously, avoid appearing the water injection volume too much in the calibration process, the phenomenon of the water injection that needs the repeated drainage, make calibration work efficiency higher, the calibration precision is better.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a schematic structural diagram of an embodiment of the float-type level gauge calibration apparatus of the present invention;
fig. 2 is a schematic structural view of the middle clamp of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a buoy type liquid level measurement instrument calibration equipment can be used to communicate instrument measuring cylinder 10, through annotating drainage operation and then calibration buoy type liquid level measurement instrument to instrument measuring cylinder 10. Wherein, still be equipped with on the instrument measurement section of thick bamboo 10 and be used for connecting the utility model discloses a calibration equipment's check-up pipeline 11, calibration pipeline 11 locate instrument measurement section of thick bamboo 10 lateral wall department on the lower side. The float type liquid level measuring instrument is arranged above the instrument measuring cylinder 10, when the water level in the instrument measuring cylinder 10 reaches a certain height, the float type liquid level measuring instrument correspondingly outputs a certain current, and whether the float type liquid level measuring instrument is accurate or not is verified by judging the corresponding relation between the water level height and the current. Referring to fig. 1, the utility model discloses in, this buoy type level measurement instrument calibration equipment includes water injection pipe 20, carries out the water injection to instrument measuring cylinder 10 through this water injection pipe 20, and then carries out the check-up work. The utility model discloses in, drainage device 30 and connector 40 are connected respectively at the both ends of water injection pipe 20, and operating personnel is connected connector 40 and check-up pipeline 11 with the back that targets in place, through drainage device 30 with check-up liquid drainage to water injection pipe 20 in, liquid carries out the check-up work in the water injection pipe 20 pours into the buoy type level measurement instrument into. For the liquid volume of accurate control entering instrument measuring cylinder 10, the utility model discloses a buoy type level measurement instrument calibration equipment still includes at least one water injection governing valve 50 that is used for controlling the inflow that gets into in the instrument measuring cylinder, and this water injection governing valve 50 communicates on water injection pipe 20. The operator can adjust the opening of the water injection regulating valve 50 as required to control the water inlet speed into the instrument measuring cylinder 10, and further control the water level height in the instrument measuring cylinder 10.
In fig. 1, although the positions of the meter measuring cylinder 10, the calibration pipeline 11 and the float type liquid level measuring instrument are shown, it can be understood that the protection scope of the present invention does not include the above meter measuring cylinder 10, the calibration pipeline 11 and the float type liquid level measuring instrument, and only serves as a cooperation explanation of the structure and function of the float type liquid level measuring instrument calibration apparatus of the present invention.
Specifically, in some embodiments, the drainage device 30 is a water injection funnel, and the end with a smaller diameter of the water injection funnel is inserted into the water injection pipe 20 and is communicated with the water injection pipe 20.
In some embodiments, the water filling regulating valve 50 is used to control the water flow rate during the water filling process, when the water level is continuously increased in the early stage of the calibration process, the water filling regulating valve 50 is fully opened, and when the water level in the meter measuring cylinder 10 is about to reach the calibration point, the water filling regulating valve 50 is gradually closed, the water filling rate is reduced, and the water level is ensured to be consistent with the requirement.
In some embodiments, referring to fig. 2, since the calibration pipelines 11 corresponding to different types of instrument measuring cartridges 10 have different diameters, it is preferable that a clamp 41 is provided on the connecting head 40 for tightly connecting the connecting head 40 with the calibration pipelines 11, so as to prevent water leakage during the calibration process and cause inaccurate calibration. In some embodiments, the clamp 41 includes a ring 411 having elasticity and having an opening, the ring 411 is provided with connecting tabs 412 at two sides of the opening, the adjusting device 413 is inserted between two adjacent connecting tabs 412 to adjust the size of the opening of the ring 411 to fit the checking pipe 11 with different diameters, preferably, the adjusting device 413 includes an adjusting screw 4131 inserted between two adjacent connecting tabs 412, one end of the adjusting screw 4131 is provided with a fastening nut 4132, the other end is provided with an adjusting mechanism 4133 for adjusting the size of the opening between the connecting tabs 412, preferably, the adjusting mechanism 4133 is an adjusting handle, in some embodiments, the inner wall of the ring 411 is further provided with an elastic pad 414 for enhancing sealing and preventing water leakage, preferably, the elastic pad 414 is an elastic gasket, when the connecting head 40 is connected with the checking pipe 11 in place, the elastic pad 414 is clamped between the connecting head 40 and the checking pipe 11, the distance between the two connecting tabs 412 is changed by rotating the adjusting handle, and then the diameter of the clamp 41 is adjusted, and when the diameter is adjusted to the proper position to ensure that water cannot leak, the adjusting handle can be locked, and the connector 40 is fixed on the check pipeline 11.
In some embodiments, in the process of checking water injection, air is difficult to avoid entering a pipeline along with water injection to form bubbles, the bubbles are continuously gathered to form large bubbles, false water level is caused, water level fluctuation is caused when a large amount of bubbles rise out of the water surface, and the two points cause water level height measurement deviation to influence a checking result. In order to discharge the bubble as early as possible, the utility model provides a buoy type level measurement instrument calibration equipment is still including the exhaust ball 60 that is arranged in discharging instrument measuring cylinder 10 and calibration equipment bubble, exhaust ball 60 locates between water injection governing valve 50 and the connector 40, the intercommunication is on water injection pipe 20, the preferred instrument measuring cylinder that is close to sets up, exhaust ball 60 is preferred to be made by soft elastic rubber material, operating personnel accessible extrusion exhaust ball 60, the water column pressurized that contains the bubble removes rapidly toward instrument measuring cylinder 10 and water injection funnel direction respectively, thereby accelerated the release of bubble to the surface of water, avoid the influence of bubble to the calibration precision.
In some embodiments, when the calibration is completed, the liquid in the calibration device is discharged rapidly, the utility model provides a float-type level gauge calibration device further comprises a drain pipe 70 communicated with the water injection pipe 20, and when the calibration is finished or a part of the liquid needs to be discharged in the calibration process, the liquid can be discharged along the drain pipe 70. Further, in some embodiments, the float-type level measurement instrument calibration apparatus further includes a three-way joint 80, the three-way joint 80 may include a first joint 81, a second joint 82 and a third joint 83 which are communicated with each other, the water injection pipe 20 includes a first water injection pipe 21 and a second water injection pipe 22 which are respectively connected to the first joint 81 and the second joint 82, a water injection funnel is connected to the first water injection pipe 21, in some embodiments, for the convenience of an operator to read the water level, preferably, a water level scale is provided on the outer wall of the first water injection pipe 21, and according to the principle of a communicating vessel, the operator may directly know the real-time water level height in the instrument measuring vessel 10 by reading the water level scale on the first water injection pipe 21. In some embodiments, the connector 40 is disposed on the second water injection pipe 22, and the air release ball 60 is communicated with the second water injection pipe 22; the third joint 83 is used to connect the drain pipe 70, and when the check filling process is performed, the drain pipe 70 is shut off so that the liquid flows only from the first filling pipe 21 to the second filling pipe 22, and when the check is completed or a part of the liquid needs to be discharged during the return check, the drain pipe 70 is opened so that the liquid can be discharged along the drain pipe 70.
Further, in some embodiments, the drain pipe 70 is further provided with a drain regulating valve 71 for regulating the amount of water to be drained, the drain regulating valve 71 is communicated with the middle of the drain pipe 70, and an operator can adjust the opening degree of the drain regulating valve 71 as required to select a proper drain flow rate. When the water level is continuously reduced at the initial stage of the water drainage of the calibration return stroke, the water drainage regulating valve 71 can be fully opened, when the water level is about to approach the calibration point, the water drainage regulating valve 71 is gradually closed, the water drainage speed is reduced, and the final water level is ensured to be consistent with the requirement.
In some embodiments, in order to facilitate the verification operation of the operator, it is preferable that the water filling funnel is further provided with a fixing device 90 for fixing the water filling funnel, and the fixing device 90 fixes the water filling funnel at a position higher than the highest water level of the measuring instrument so as to facilitate the liquid to enter the measuring cylinder of the instrument. Preferably, the fixing device 90 is a suspension rope, and an operator can tie the suspension rope at a proper height as required to adapt to measuring instruments of different models. When the step response performance of the instrument needs to be checked, the suspension rope is quickly tensioned or released to change the water injection quantity entering the instrument measuring cylinder 10, namely the water level height in the instrument measuring cylinder 10 can be changed, and the function check of the step response of the liquid level measuring instrument is realized.
As a preferred embodiment of the present invention, referring to fig. 1, when the float-type liquid level measuring instrument calibration device provided by the present invention is used to calibrate the float-type liquid level measuring instrument, firstly, it is checked to confirm that the first water injection pipe 21, the second water injection pipe 22 and the drain pipe 70 are firmly connected to the three-way joint 80 without looseness, the calibration device is pressed close to the instrument measuring cylinder 10 of the liquid level measuring instrument as much as possible, the water injection funnel is fixed at a proper height through the suspension rope, the position of the water injection funnel is slightly higher than the highest water level of the liquid level measuring instrument, about 10cm is recommended, and the overflow of water injection when the water injection reaches the full water level is avoided; the connector 40 enables the clamp 41 and the verification pipeline 11 to be connected in place by adjusting the adjusting screw 4131 and is locked by the adjusting mechanism 4133; the first water injection pipe 21 is vertically arranged close to the outer wall of the instrument measuring cylinder 10 as much as possible, and the lowest point of the second water injection pipe 22 after being fixed is lower than the check pipeline 11 of the instrument measuring cylinder 10, so that a certain water injection and storage space is reserved to facilitate the step response test of the instrument; in some embodiments, a measuring scale may be fixed near the first water injection pipe 21, and the real-time water level value in the meter measuring cylinder 10 may be read during the calibration process through the communicating pipe principle, or the real-time water level value in the meter measuring cylinder 10 may be directly known by reading the scale on the outer wall of the first water injection pipe 21.
In the water injection process of the calibration process, the water injection regulating valve 50 is opened, the water discharge regulating valve 71 is closed, water is injected into the water injection funnel, and the water level height in the first water injection pipe 21, namely the actual water level height in the instrument measuring cylinder 10, can be observed by observing the measuring scale or the scale on the outer wall of the first water injection pipe 21; when the water level is about to rise to the height of the check point, gradually closing the water injection regulating valve 50 until the water level rises to the check point, stopping water injection, and if the real-time water level is found to exceed the height of the check point, properly opening the water discharge regulating valve 71 for water discharge; in the process of checking the return water, the water discharge regulating valve 71 is opened to discharge the water injected in the instrument measuring cylinder 10, and when the water level height is about to reach the water level of the check point, the water discharge regulating valve 71 is gradually closed until the real-time water level is consistent with the water level of the check point. In the water injection process, the quantity of the bubbles entering the pipeline along with water injection is closely observed, when the bubbles are gathered to a certain quantity, the water injection is stopped, the drainage ball is repeatedly extruded, and the water injection is continued after the bubbles are discharged.
Under the condition that the lowest point of the second water injection pipe 22 is lower than the check pipeline 11 of the instrument measuring cylinder 10, the suspension rope is quickly lifted to a certain height, water injection in the check device is quickly injected into the instrument measuring cylinder 10, and the output response of the liquid level measuring instrument in the water level step rising process can be checked; when the suspension rope is quickly loosened to a certain height, the water level of the measuring cylinder 10 will quickly flow back to the pipeline of the calibration device, and the output response of the liquid level measuring instrument in the process of the step drop of the water level can be checked.
After the calibration is completed, the drainage regulating valve 71 is fully opened, the suspension rope is directly loosened, the water injection funnel is placed at a position lower than the calibration pipeline 11, and then the water injection pipe 20 and the drainage pipe 70 synchronously drain water to improve the working efficiency of drainage.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The buoy type calibration device for the liquid level measuring instrument is characterized by comprising a water injection pipe (20) communicated to an instrument measuring cylinder (10), wherein one end of the water injection pipe (20) is provided with a drainage device (30) used for draining calibration liquid to the water injection pipe (20), the other end of the water injection pipe is provided with a connector (40) used for connecting a calibration pipeline (11) of the instrument measuring cylinder (10), at least one water injection regulating valve (50) used for controlling water inflow entering the instrument measuring cylinder (10) is further arranged between the drainage device (30) and the connector (40), and the water injection regulating valve (50) is communicated with the water injection pipe (20);
be equipped with on connector (40) be used for with check-up pipeline (11) fixed connection's clamp (41), connector (40) pass through clamp (41) with instrument measuring cylinder (10) fixed connection, clamp (41) are including being equipped with open-ended elastic ring (411), the open-ended both sides are equipped with connection lug piece (412) respectively, clamp (41) are still including being used for adjusting device (413) of opening size.
2. The float-type liquid level measuring instrument calibration device according to claim 1, wherein said adjusting device (413) comprises a connecting screw (4131) inserted between two adjacent connecting lugs (412), one end of said connecting screw (4131) is provided with a fastening nut (4132), and the other end is provided with an adjusting mechanism (4133) for adjusting the size of the opening between said connecting lugs (412);
the inner wall of the elastic circular ring (411) is also provided with an elastic cushion (414) for strengthening sealing and preventing water leakage.
3. The float-type level gauge calibration device according to claim 1, wherein an exhaust ball (60) for exhausting is further disposed between the water injection regulating valve (50) and the connector (40), and the exhaust ball (60) is close to the float-type level gauge calibration pipeline (11) and is communicated with the water injection pipe (20).
4. The float level gauge verification device according to claim 1, further comprising a drain (70) for draining the gauge cartridge (10) and the verification liquid in the float level gauge verification device, wherein the drain (70) is in communication with the fill pipe (20).
5. The float-type level gauge verification device according to claim 4, wherein the water injection pipe (20) communicates with the drain pipe (70) through a three-way joint (80), the three-way joint (80) communicating with a first joint (81), a second joint (82), and a third joint (83), the water injection pipe (20) including a first water injection pipe (21) communicating with the first joint (81), and a second water injection pipe (22) communicating with the second joint (82), the third joint (83) communicating with the drain pipe (70).
6. The float level gauge verification device according to claim 5, wherein the tapping device (30) communicates with the first filling pipe (21); the connector (40) is communicated with the second water injection pipe (22).
7. The float-type level gauge calibration device according to claim 6, wherein the outer wall of the first water injection pipe (21) is provided with a scale for displaying the height of the water level.
8. The float-type level gauge verification device according to claim 6, wherein a drain regulating valve (71) for regulating the amount of water to be drained is further provided on the drain pipe (70), and the drain regulating valve (71) is provided in the middle of the drain pipe (70).
9. The float-type level gauge calibration device according to claim 1, wherein the drainage device (30) is a water filling funnel, and the water filling funnel is communicated with the water filling pipe (20).
10. The float-type level gauge calibration device according to claim 9, wherein a fixing device (90) for fixing the water injection funnel at a position higher than the highest water level of the float-type level gauge is further provided at a position where the water injection funnel communicates with the water injection pipe (20);
the fixing device (90) is a suspension rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021714539.0U CN213021788U (en) | 2020-08-17 | 2020-08-17 | Float-type liquid level measuring instrument calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021714539.0U CN213021788U (en) | 2020-08-17 | 2020-08-17 | Float-type liquid level measuring instrument calibration device |
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| CN213021788U true CN213021788U (en) | 2021-04-20 |
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| CN202021714539.0U Active CN213021788U (en) | 2020-08-17 | 2020-08-17 | Float-type liquid level measuring instrument calibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945328A (en) * | 2021-09-28 | 2022-01-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Calibration device for water leakage detection system of converter valve |
-
2020
- 2020-08-17 CN CN202021714539.0U patent/CN213021788U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945328A (en) * | 2021-09-28 | 2022-01-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Calibration device for water leakage detection system of converter valve |
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