CN116085694B - Alarm device for chemical engineering safety - Google Patents
Alarm device for chemical engineering safety Download PDFInfo
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- CN116085694B CN116085694B CN202310354000.0A CN202310354000A CN116085694B CN 116085694 B CN116085694 B CN 116085694B CN 202310354000 A CN202310354000 A CN 202310354000A CN 116085694 B CN116085694 B CN 116085694B
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- Prior art keywords
- protective box
- groove
- pipeline
- box
- fixedly connected
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/003—Auxiliary devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/006—Attachments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of alarm devices; the invention discloses a chemical safety alarm device, which comprises a protective box and a box cover, wherein one end of the box cover is hinged with the protective box, and the other end of the box cover is detachably connected with the protective box; through holes for the pipeline to pass through are formed in two sides of the protective box; a fixed block propped against the pipeline is fixedly connected in the protective box, grooves positioned at the joint of the pipeline and the valve are formed in two sides of the top of the fixed block, and a first liquid level sensor is arranged in the grooves; the top of case lid is equipped with first controller and first audible and visual alarm, and first level sensor and first audible and visual alarm all are connected with first controller electricity. The double-prevention device mainly solves the problem that the existing double-prevention device for chemical safety cannot give an alarm in time when the leakage liquid is less.
Description
Technical Field
The invention relates to the technical field of alarm devices, in particular to a chemical safety alarm device.
Background
The chemical plant is a factory which is used for the chemical industry, and the production workshop of the chemical plant needs to be strictly checked to check some equipment with problems, so that the safety of the production workshop and workers is ensured; the production workshop is internally provided with a pipeline and a valve for transporting chemical liquid, and the pipeline and the valve are connected through a flange plate; in the use process, the joint of the pipeline and the valve can possibly generate leakage, so that not only can the environment be polluted, but also safety accidents can be caused; at present, the leakage detection mode is mainly manual inspection, so that the labor intensity of workers is high and the workers cannot find the leakage in time; moreover, the leaked liquid is not effectively controlled, and the prevention effect is not high.
In order to solve the problems, chinese patent publication No. CN215495293U discloses a dual-prevention device for chemical safety, which comprises a protective box, wherein the upper surface of the protective box is rotationally connected with a top cover through a hinge, a valve is arranged in the protective box, two ends of the valve are fixedly provided with pipelines through flange plates, one end of the pipeline, which is far away from the valve, extends to the outside of the protective box, an installation box is embedded in the inner bottom wall of the protective box, the upper surface of the installation box is fixedly connected with an electrode plate, and the bottom of the installation box extends to the outside of the protective box; the patent is provided with the electrode plate, the remote controller and the second audible and visual alarm, when liquid leakage occurs at the joint of the pipeline and the valve, the leaked liquid can be collected at the bottom of the protective box, so that chemical liquid is prevented from leaking to the outside to pollute the environment or safety accidents; and when the leaked liquid floods the electrode slice, the electrode slice is communicated and conductive, so that a second audible and visual alarm is triggered to remind a worker of checking and maintaining in time, and an automatic alarm effect is realized.
In the actual use process of the patent, although the alarm can be given when the liquid leakage occurs, the alarm can be generated only after the liquid leakage reaches the submerged electrode plate; when the leakage amount of liquid at the joint of the pipeline and the valve is small, and the liquid is slowly dripped and leaked in a droplet mode, a long time is needed to submerge the electrode plate, so that the alarm is not timely, and further, the staff cannot timely check and maintain the electrode plate.
Disclosure of Invention
The invention aims to provide an alarm device for chemical engineering safety, which solves the problem that the existing dual-prevention device for chemical engineering safety can not give an alarm in time when the leakage of liquid is less.
In order to achieve the above purpose, the invention adopts the following technical scheme: the chemical safety alarm device comprises a protective box and a box cover, wherein one end of the box cover is hinged with the protective box, and the other end of the box cover is detachably connected with the protective box; through holes for the pipeline to pass through are formed in two sides of the protective box;
a fixed block propped against the pipeline is fixedly connected in the protective box, grooves positioned at the joint of the pipeline and the valve are formed in two sides of the top of the fixed block, and a first liquid level sensor is arranged in the grooves; the top of case lid is equipped with first controller and first audible and visual alarm, and first level sensor and first audible and visual alarm all are connected with first controller electricity.
Further, the height of one side of the groove close to the side wall of the protective box is larger than the height of one side of the groove far away from the side wall of the protective box.
Further, the top of the fixed block is provided with an overflow groove, the overflow groove is positioned between the two grooves, and the overflow groove is communicated with the shunt pipe; the inside of the fixed block is symmetrically provided with a cavity taking the overflow groove as a center, and the cavity is communicated with the shunt tube; the chamber is provided with a secondary alarm mechanism which is used for warning that leaked liquid enters the chamber.
Further, the secondary alarm mechanism comprises a mounting box, a second audible alarm and a second controller, a bottom groove is arranged in the cavity, the mounting box is fixedly connected in the bottom groove, an electrode plate is fixedly connected at the top of the mounting box, and the electrode plate is positioned in the cavity; the second audible and visual alarm and the second controller are fixedly connected to the top of the box cover, and the second audible and visual alarm and the electrode plate are electrically connected with the second controller.
Further, the device also comprises a T-shaped pipe, wherein the T-shaped pipe comprises a transverse section and a vertical section communicated with the transverse section, and two ends of the transverse section are respectively communicated with the two chambers; the fixed block is internally provided with a storage chamber which is communicated with one end of the vertical section far away from the transverse section.
Further, the transverse section is V-shaped, and the height of the joint of the transverse section and the cavity is larger than the height of the joint of the transverse section and the vertical section.
Further, the two sides of the valve on the protective box are both in sliding connection with a preset block which is used for propping against the valve, and a preset groove which is used for being in sliding fit with the flange plate is formed in the preset block; the fixed block is rotationally connected with a rotating shaft, the rotating shaft is rotationally connected with the protective box, and the rotating shaft penetrates through the storage chamber; a guide rod is fixedly connected in the protective box and is positioned above the through hole; the guide rod is connected with two clamping plates for clamping flange plates on two sides of the valve in a sliding manner, and the guide rod further comprises a linkage part which drives the two clamping plates to approach or separate along with the rotation of the rotating shaft.
Further, the linkage part comprises a bidirectional screw rod, circular shafts positioned at two sides of the bidirectional screw rod, a second liquid level sensor, a third controller and a motor, two ends of the bidirectional screw rod are fixedly connected with the two circular shafts respectively, the circular shafts are rotationally connected with the inner wall of the protective box, the clamping plates are in threaded connection with the bidirectional screw rod, and the movement directions of the two clamping plates are opposite; a belt is arranged between the circular shaft and the rotating shaft; the second liquid level sensor and the motor are electrically connected with the third controller, the second liquid level sensor is arranged in the storage chamber, and the third controller and the motor are arranged on the side wall of the protective box; an output shaft of the motor is fixedly connected with the rotating shaft.
Further, the bottom of the clamping plate is provided with an arc-shaped groove attached to the pipeline, and the arc length of the arc-shaped groove is greater than the circumference of one half of the outer circle of the pipeline.
Further, vertical grooves are formed in two sides of the top of the protective box, wedge blocks are connected in a sliding mode in the vertical grooves, springs are fixedly connected between the wedge blocks and the protective box, and transverse blocks are fixedly connected between the two wedge blocks; the clamping plates are provided with wedge surfaces for extruding wedge blocks, and the wedge surfaces on the two clamping plates are transversely opposite; the top of the clamping plate is provided with a limit groove for the wedge to extend into, the wedge is in sliding fit with the limit groove, and the limit groove is positioned on the movement track of the wedge.
The principle and the advantages of the scheme are as follows:
1. after both ends of the valve are fixedly connected with the pipeline through the flange plates, the preset blocks slide into the protective box, so that the preset blocks are propped against the side wall of the valve, meanwhile, the flange plates on one side of the valve slide into the preset grooves, namely, the preset blocks are installed in place during installation, and therefore the valve and the pipeline can be connected in a fastening mode, and the flowing of liquid is guaranteed.
2. After the scheme is operated normally for a long time, the flange plate at the joint of the valve and the pipeline is worn, so that the joint of the valve and the pipeline is loosened; or is influenced by external factors, such as looseness of the joint of the valve and the pipeline caused by collision; when the liquid leakage occurs at the joint of the valve and the pipeline due to looseness, a gap is necessarily formed at the joint of the valve and the pipeline, and then the preset block is cracked from the preset groove, so that one side of the preset block, which is far away from the valve, is tilted; when a small amount of liquid leaks, and the liquid slowly drops in the form of liquid drop, compare in prior art, this scheme a small amount of liquid can be collected to the recess in for liquid and first level sensor contact, first level sensor is with signal transmission first controller, and first audible and visual alarm warning is controlled to first controller, makes the staff in time go to inspection and maintenance.
3. According to the scheme, when more liquid leaks at the joint of the valve and the pipeline, the liquid firstly enters the groove, so that the liquid level of the groove gradually rises; the liquid continuously enters the groove, and the height of one side of the groove close to the side wall of the protective box is larger than the height of one side of the groove far away from the side wall of the protective box, so that the liquid in the groove flows in the direction of lower height of the groove, namely, the liquid in the groove flows in the direction of overflowing the groove; after the liquid enters the overflow groove, the liquid is equally divided into two chambers through the shunt pipe, so that a temporary storage space is provided for more leaked liquid; and, along with the liquid in the cavity more and more, the electrode slice will be submerged to liquid for the electrode slice intercommunication is electrically conductive, thereby triggers second audible and visual annunciator warning, makes the staff in time go to inspection and maintenance.
4. When the liquid leaks at the connection positions of the valves and the pipelines, the first audible and visual alarm gives an alarm, if the leaked liquid gradually increases at the connection position of one of the valves and the pipeline, the liquid can quickly fill the grooves, so that the liquid overflows from the grooves, and workers cannot know the situation; therefore, only the first audible and visual alarm can not know the situation that the temporary and sudden liquid leakage is increased, so that the emergency repair can not be performed preferentially and timely, and the secondary alarm mechanism can play a good role in alarming and warning aiming at the situation that the temporary and sudden liquid leakage is increased.
5. According to the scheme, when more or more urgent liquid leakage occurs at the joint of the valve and the pipeline, the gap at the joint of the valve and the pipeline is larger, namely the cracking condition of the preset groove is more serious, so that the limiting effect of the preset groove on the flange plate is greatly weakened; liquid fills the grooves and the chambers in sequence, and redundant liquid can enter the storage chamber through the T-shaped pipe; when liquid contacts with a second liquid level sensor, the second liquid level sensor transmits signals to a third controller, the third controller controls a motor to work, an output shaft of the motor drives a rotating shaft to rotate, the rotating shaft can drive a round shaft to rotate through a belt, the round shaft drives a bidirectional screw rod to rotate, and then the two clamping plates are driven to move in opposite directions, so that the two clamping plates are close to each other, and further the two clamping plates clamp two preset blocks.
In addition, when more liquid leakage all appears in the junction of a plurality of valves and pipeline, and the staff of maintenance is less, adopts the relief measure of this scheme to make the leakage condition of every department obtain alleviating, can effectively avoid appearing more serious leakage condition on the one hand, and then avoid causing more serious loss, on the other hand can also strive for more maintenance time for the staff to the staff can maintain leakage department one by one.
6. The T-shaped pipe comprises a transverse section and a vertical section communicated with the transverse section, the transverse section is in a V shape, and the height of the joint of the transverse section and the cavity is larger than that of the joint of the transverse section and the vertical section, so that the transverse section can play a guiding role on the flow of liquid, and further promote the flow of the liquid from the cavity to the vertical section, so that the flow of the liquid is smoother, and the redundant liquid can be transferred to the storage chamber more quickly.
7. In the scheme, during the opposite movement of the two clamping plates, the clamping plates extrude the wedge blocks to move upwards through the wedge surfaces, and the springs stretch to enable the wedge blocks to prop against the tops of the clamping plates; the clamping plate continues to move, when the wedge block and the limiting groove are vertically opposite, the wedge block stretches into the limiting groove under the action of the spring, so that limiting of the clamping plate is achieved, on one hand, the stability of clamping of the flange plates on two sides of the valve by the two clamping plates can be improved, on the other hand, forward rotation or reverse rotation of the bidirectional screw can be avoided, further, the flange plates are prevented from being damaged by continuous opposite movement of the two clamping plates under the forward rotation condition of the bidirectional screw, the flange plates on two sides of the valve cannot be clamped under the reverse rotation condition of the bidirectional screw are also prevented, and further, the leakage condition of the valve and the pipeline joint is guaranteed to be relieved by improving the fitting degree of the valve and the pipeline joint.
8. According to the scheme, when the limit of the clamping plate is required to be canceled, the transverse block is pulled to move upwards, and can drive the two wedges to move upwards simultaneously, so that the wedges move out of the limit groove, the spring is stretched, and the operation is simpler and more convenient.
9. The top and the pipeline of this scheme fixed block offset, and the arc wall of clamping plate bottom also offsets with the pipeline, can improve the stability that the pipeline supported on the one hand, and on the other hand can also press from both sides tightly the pipeline, and then play limiting displacement to the pipeline, avoid the pipeline to appear the skew, improved the stability that pipeline and valve are connected.
10. The arc length of the arc-shaped groove is larger than the circumference of one half of the outer circle of the pipeline, so that the clamping plate can act on the position below the middle part of the preset block, the contact area is increased, and the clamping effect is enhanced.
Drawings
FIG. 1 is a front view in cross section of an embodiment of an alarm device for chemical safety according to the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a front view of two predetermined blocks of FIG. 1;
fig. 4 is a top view of fig. 3.
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the protective housing 10, the seal ring 11, the predetermined block 12, the predetermined groove 121, the housing cover 20, the first side block 21, the fixed block 30, the groove 31, the first liquid level sensor 311, the first controller 312, the first audible and visual annunciator 313, the first drain pipe 314, the overflow groove 32, the shunt pipe 33, the chamber 34, the mounting case 341, the second audible and visual annunciator 342, the second controller 343, the second drain pipe 344, the tee pipe 35, the transverse segment 351, the vertical segment 352, the storage chamber 36, the third drain pipe 361, the rotating shaft 362, the guide rod 40, the clamping plate 41, the bidirectional screw 50, the circular shaft 51, the belt 52, the wedge 60, the spring 61, the transverse block 62, the limit groove 63, the pipe 70, the valve 80, the second liquid level sensor 90, the third controller 91, and the motor 92.
Detailed Description
An example is substantially as shown in figures 1, 2, 3 and 4: the utility model provides a chemical industry safety alarm device, includes protective housing 10 and case lid 20, and the one end of case lid 20 is articulated with protective housing 10, and the other end and the protective housing 10 of case lid 20 can dismantle the connection, specifically is: the left side wall of the box cover 20 is fixedly connected with a first side block 21, the left side wall of the protective box 10 is fixedly connected with a second side block, and threaded holes are formed in the first side block 21 and the second side block; when the case cover 20 is covered on the protective case 10, the first side block 21 is attached to the second side block, and the threaded hole on the first side block 21 is communicated with the threaded hole on the second side block, and the existing threaded rod is simultaneously connected with the threaded hole on the first side block 21 and the threaded hole on the second side block through threads, so that the connection between the first side block 21 and the second side block is realized, and the connection between the case cover 20 and the protective case 10 is realized, namely, the sealing of the protective case 10 can be completed through the case cover 20. The through holes for the pipeline 70 to pass through are formed in the two sides of the protective box 10, the sealing rings 11 are fixedly connected to the two sides of the protective box 10, the sealing rings 11 are arranged at the joint of the pipeline 70 and the protective box 10, and the sealing rings 11 are matched with the pipeline 70.
A fixed block 30 is fixedly connected in the protective box 10, an arc-shaped surface is arranged at the top of the fixed block 30, and the arc-shaped surface is propped against the pipeline 70; grooves 31 are formed in the two sides of the top of the fixed block 30 and are positioned at the joint of the pipeline 70 and the valve 80, and a first liquid level sensor 311 is arranged in each groove 31; the top of the case cover 20 is provided with a first controller 312 and a first audible and visual alarm 313, and the first liquid level sensor 311 and the first audible and visual alarm 313 are electrically connected with the first controller 312; the height of the side of the groove 31 close to the side wall of the protective box 10 is larger than the height of the side of the groove 31 away from the side wall of the protective box 10. The groove 31 is communicated with a first drain pipe 314 extending out of the back surface of the protective box 10, the first drain pipe 314 is of a tubular structure, the position of the first drain pipe 314 extending out of the protective box 10 is flush with the bottom position of the groove 31, namely, the first drain pipe 314 is parallel to the horizontal plane, and a first switch valve is arranged on the first drain pipe 314; in use, the first switch valve may be periodically opened to drain the liquid from the first drain pipe 314.
The top of the fixed block 30 is provided with an overflow groove 32, the overflow groove 32 is positioned between the two grooves 31, and the overflow groove 32 is communicated with a shunt tube 33; the inside of the fixed block 30 is symmetrically provided with a cavity 34 taking the overflow groove 32 as a center, and the cavity 34 is communicated with the shunt tube 33; a secondary alarm mechanism is arranged in the chamber 34 and is used for warning the leaked liquid to enter the chamber 34; the secondary alarm mechanism comprises a mounting box 341, a second audible and visual alarm 342 and a second controller 343, a storage battery is arranged in the mounting box 341, a bottom groove is formed in the cavity 34, the mounting box 341 is fixedly connected in the bottom groove, an electrode plate is fixedly connected at the top of the mounting box 341, and the electrode plate is positioned in the cavity 34; the second audible and visual alarm 342 and the second controller 343 are fixedly connected to the top of the case cover 20, and the storage battery, the second audible and visual alarm 342 and the electrode plate are electrically connected with the second controller 343; the chamber 34 is communicated with a second drain pipe 344 extending out of the back of the protective box 10, the second drain pipe 344 is of a tubular structure, the position of the second drain pipe 344 extending out of the protective box 10 is flush with the bottom of the chamber 34, namely, the second drain pipe 344 is parallel to the horizontal plane, and a second switch valve is arranged on the second drain pipe 344; in use, the second on-off valve may be periodically opened to drain the liquid from the second drain pipe 344.
Also comprises a T-shaped pipe 35, wherein the T-shaped pipe 35 comprises a transverse section 351 and a vertical section 352 communicated with the transverse section 351, and two ends of the transverse section 351 are respectively communicated with the two chambers 34; the fixed block 30 is internally provided with a storage chamber 36, and the storage chamber 36 is communicated with one end of the vertical section 352 away from the transverse section 351; the vertical spacing of the transverse section 351 from the bottom of the chamber 34 is less than the height of the chamber 34; a third drain pipe 361 extending out of the back surface of the protective box 10 is communicated with the storage chamber 36, and a third switch valve is arranged on the third drain pipe 361; in use, the third switching valve is periodically opened to drain the liquid in the third drain pipe 361. The transverse section 351 is V-shaped, and the height of the junction of the transverse section 351 and the chamber 34 is greater than the height of the junction of the transverse section 351 and the vertical section 352;
the two sides of the protective box 10, which are positioned on the valve 80, are both in sliding connection with a preset block 12 which is used for propping against the side wall of the valve 80, the two preset blocks 12 are propped against each other, the protective box 10 is provided with a side hole, the side hole is used for the two preset blocks 12 to slide into the protective box, and the preset block 12 is provided with a preset groove 121 which is used for being in sliding fit with the flange plate; the fixed block 30 is rotatably connected with a rotating shaft 362, the rotating shaft 362 is rotatably connected with the protective box 10, and the rotating shaft 362 penetrates through the storage chamber 36; a guide rod 40 is fixedly connected in the protective box 10, and the guide rod 40 is positioned above the through hole, namely the guide rod 40 is positioned above the pipeline 70; the guide rod 40 is slidably connected with two clamping plates 41 for clamping flanges on two sides of the valve 80, the guide rod also comprises a linkage part which rotates along with the rotating shaft 362 to drive the two clamping plates 41 to approach or separate, the linkage part comprises a bidirectional screw rod 50, round shafts 51 positioned on two sides of the bidirectional screw rod 50, a second liquid level sensor 90, a third controller 91 and a motor 92, two ends of the bidirectional screw rod 50 are fixedly connected with the two round shafts 51 respectively, the round shafts 51 are rotationally connected with the inner wall of the protective box 10, namely, the number of the round shafts 51 is two, one round shaft 51 is fixedly connected on the left inner wall of the protective box 10, the other round shaft 51 is fixedly connected on the right inner wall of the protective box 10, the bidirectional screw rod 50 is positioned between the two round shafts 51, the left end of the bidirectional screw rod 50 is fixedly connected with the right end of the round shaft 51 on the left side of the protective box 10, and the right end of the bidirectional screw rod 50 is fixedly connected with the left end of the round shaft 51 on the right side of the protective box 10; the clamping plates 41 are in threaded connection with the bidirectional screw 50, and the movement directions of the two clamping plates 41 are opposite; a belt 52 is fixedly connected between the circular shaft 51 and the rotating shaft 362, an arc-shaped groove which is attached to the pipeline 70 is formed in the bottom of the clamping plate 41, and the arc length of the arc-shaped groove is larger than the circumference of one half of the outer circle of the pipeline; the second liquid level sensor 90 and the motor 92 are electrically connected with the third controller 91, the second liquid level sensor 90 is installed in the storage chamber 36, and the third controller 91 and the motor 92 are installed on the side wall of the protective box 10; the motor 92 is a servo motor, that is, the output shaft of the motor 92 can drive the rotating shaft 362 to rotate forward and backward, the motor 92 can be controlled to be opened and closed independently, and the output shaft of the motor 92 is fixedly connected with the rotating shaft 362.
The two sides of the top of the protective box 10 are provided with vertical grooves, wedge blocks 60 are connected in a sliding manner in the vertical grooves, springs 61 are fixedly connected between the wedge blocks 60 and the protective box 10, and transverse blocks 62 are fixedly connected between the two wedge blocks 60; the clamping plates 41 are provided with wedge surfaces for extruding the wedge blocks 60, and the wedge surfaces on the two clamping plates 41 are transversely opposite; the top of the clamping plate 41 is provided with a limit groove 63 for the wedge 60 to extend into, the wedge 60 is in sliding fit with the limit groove 63, and the limit groove 63 is positioned on the movement track of the wedge 60.
The specific implementation process is as follows:
when the valve is used, the two ends of the valve 80 are connected with the pipeline 70 through the flanges, the two ends of the valve 80 respectively penetrate through the through holes at the two sides of the protective box 10, and the two preset blocks 12 are slid into the protective box 10, so that the preset blocks 12 are propped against the side wall of the valve 80, and meanwhile, the flange at one side of the valve 80 is slid into the preset groove 121, so that the connection between the valve 80 and the pipeline 70 can be fastened; sealing the joint of the pipeline 70 and the protective box 10 by using a sealing ring 11; the cover 20 is rotated to cover the cover 20 on the protective box 10, and then the cover 20 is connected with the protective box 10, so that the protective box 10 is sealed, and the joint of the valve 80 and the pipeline 70 can be protected.
When the liquid leakage occurs at the connection position of the valve 80 and the pipe 70, a gap is necessarily formed at the connection position of the valve 80 and the pipe 70, so that the predetermined block 12 is cracked from the predetermined groove 121, and one side of the predetermined block 12 away from the valve is tilted; when a small amount of liquid leaks, and the liquid slowly drops in the form of liquid drops, the liquid is collected in the groove 31, so that the liquid is in contact with the first liquid level sensor 311, the first liquid level sensor 311 transmits a signal to the first controller 312, and the first controller 312 controls the first audible and visual alarm 313 to alarm and warn, so that a worker can go to inspection and maintenance in time.
When more liquid leaks at the joint of the valve 80 and the pipe 70, the liquid first enters the groove 31, so that the liquid level of the groove 31 gradually rises; the liquid continuously enters the groove 31 again, and the height of one side of the groove 31 close to the side wall of the protective box 10 is larger than the height of one side of the groove 31 far away from the side wall of the protective box 10, so that the liquid in the groove 31 flows in the direction of the lower height of the groove 31, namely, the liquid in the groove 31 flows in the direction of the overflow groove 32, and the liquid can be prevented from overflowing from the side of the groove 31 far away from the overflow groove 32 and being retained in the protective box 10, so that the cleaning is inconvenient; after the liquid enters the overflow trough 32, the liquid is divided into two chambers 34 by the shunt tubes 33, so that a temporary storage space is provided for more leaked liquid; and, as more and more liquid is in the chamber 34, the liquid will submerge the electrode pads, so that the electrode pads are electrically connected, and the second audible and visual alarm 342 is triggered to alarm, so that the staff can go to inspection and maintenance in time.
In addition, when the liquid leaks at the connection position of the plurality of valves 80 and the pipeline 70, the first audible and visual alarm 313 will alarm, if the liquid leaking at the connection position of one of the valves 80 and the pipeline 70 is gradually increased, the liquid will fill the groove 31 rapidly, so that the liquid overflows from the groove 31, and the staff will not know from the situation; therefore, only the first audible and visual annunciator 313 cannot know the situation of the increase of temporary and sudden liquid leakage, so that the emergency repair cannot be performed preferentially and timely, and the secondary alarm mechanism can play a good role in alarming and warning aiming at the situation of the increase of temporary and sudden liquid leakage.
When more or more urgent liquid leaks occur at the connection of the valve 80 and the pipe 70, the liquid fills the groove 31 and the cavity 34 in sequence, and the excessive liquid can enter the storage chamber 36 through the T-shaped pipe 35 for temporary storage; moreover, since the tee pipe 35 comprises the transverse section 351 and the vertical section 352 communicated with the transverse section 351, the transverse section 351 is V-shaped, and the height of the joint of the transverse section 351 and the cavity 34 is larger than the height of the joint of the transverse section 351 and the vertical section 352, the transverse section 351 can guide the flow of liquid, and further promote the liquid to flow from the cavity 34 into the vertical section 352, so that the flow of the liquid is smoother.
When the liquid contacts with the second liquid level sensor 90, the second liquid level sensor 90 transmits signals to the third controller 91, the third controller 91 controls the motor 92 to work, the output shaft of the motor 92 drives the rotating shaft 362 to rotate, the rotating shaft 362 can drive the round shaft 51 to rotate through the belt 52, the round shaft 51 drives the bidirectional screw 50 to rotate, and further drives the two clamping plates 41 to move in opposite directions, so that the two clamping plates 41 are close to each other, and further the two clamping plates 41 clamp the two preset blocks 12, so that the cracking parts of the preset blocks 12 are attached again, the original shape of the preset groove 121 is temporarily restored, and therefore the flanges at two sides of the valve 80 can be limited again, the attachment degree of the joint of the valve 80 and the pipeline 70 is higher, the leakage condition of the joint of the valve 80 and the pipeline 70 is relieved, and more maintenance time is strived for staff; and, during the movement of the two clamping plates 41 toward each other, the clamping plates 41 move upward by pressing the wedge 60 with the wedge surface, and the springs 61 are stretched so that the wedge 60 abuts against the top of the clamping plates 41; the clamping plates 41 continue to move, when the wedge blocks 60 are vertically opposite to the limiting grooves 63, the wedge blocks 60 extend into the limiting grooves 63 under the action of the springs 61, so that limiting of the clamping plates 41 is achieved, on one hand, stability of clamping of the flange plates on two sides of the valve 80 by the two clamping plates 41 can be improved, on the other hand, forward rotation or reverse rotation of the bidirectional screw 50 can be avoided, further, the condition that the flange plates are damaged by the fact that the two clamping plates 41 continue to move in opposite directions under the forward rotation of the bidirectional screw 50 is avoided, the condition that the flange plates on two sides of the valve 80 cannot be clamped by the two clamping plates 41 under the reverse rotation of the bidirectional screw 50 is avoided, and further, leakage conditions of the joint of the valve 80 and the pipeline 70 are guaranteed to be relieved by improving the fitting degree of the joint of the valve 80 and the pipeline 70.
When the limit on the clamping plate 41 is required to be canceled, the transverse block 62 is pulled to move upwards, and the transverse block 62 can drive the two wedge blocks 60 to move upwards at the same time, so that the wedge blocks 60 move out of the limit groove 63, and the spring 61 stretches, so that the operation is simpler and more convenient; and, after the wedge 60 moves out of the limit groove 63, the positions of the two clamping plates 41 are also convenient to adjust, and the later maintenance is convenient.
Claims (5)
1. The chemical safety alarm device comprises a protective box and a box cover, wherein one end of the box cover is hinged with the protective box, and the other end of the box cover is detachably connected with the protective box; through holes for the pipeline to pass through are formed in two sides of the protective box; the method is characterized in that: a fixed block propped against the pipeline is fixedly connected in the protective box, grooves positioned at the joint of the pipeline and the valve are formed in two sides of the top of the fixed block, and a first liquid level sensor is arranged in the grooves; the top of the box cover is provided with a first controller and a first audible and visual alarm, and the first liquid level sensor and the first audible and visual alarm are electrically connected with the first controller; the top of the fixed block is provided with an overflow groove, the overflow groove is positioned between the two grooves, and the overflow groove is communicated with the shunt pipe; the inside of the fixed block is symmetrically provided with a cavity taking the overflow groove as a center, and the cavity is communicated with the shunt tube; a secondary alarm mechanism is arranged in the cavity and used for warning that leaked liquid enters the cavity; the secondary alarm mechanism comprises a mounting box, a second audible and visual alarm and a second controller, a bottom groove is arranged in the cavity, the mounting box is fixedly connected in the bottom groove, an electrode plate is fixedly connected at the top of the mounting box, and the electrode plate is positioned in the cavity; the second audible and visual alarm and the second controller are fixedly connected to the top of the box cover, and the second audible and visual alarm and the electrode plate are electrically connected with the second controller; the T-shaped pipe comprises a transverse section and a vertical section communicated with the transverse section, and two ends of the transverse section are respectively communicated with the two chambers; a storage chamber is arranged in the fixed block and is communicated with one end of the vertical section far away from the transverse section; the two sides of the valve on the protective box are both in sliding connection with a preset block which is used for propping against the valve, and a preset groove which is used for being in sliding fit with the flange plate is arranged on the preset block; the fixed block is rotationally connected with a rotating shaft, the rotating shaft is rotationally connected with the protective box, and the rotating shaft penetrates through the storage chamber; a guide rod is fixedly connected in the protective box and is positioned above the through hole; the guide rod is connected with two clamping plates for clamping flange plates on two sides of the valve in a sliding manner, and the guide rod further comprises a linkage part which drives the two clamping plates to approach or separate along with the rotation of the rotating shaft; the linkage part comprises a bidirectional screw rod, circular shafts positioned at two sides of the bidirectional screw rod, a second liquid level sensor, a third controller and a motor, wherein two ends of the bidirectional screw rod are fixedly connected with the two circular shafts respectively, the circular shafts are rotationally connected with the inner wall of the protective box, the clamping plates are in threaded connection with the bidirectional screw rod, and the movement directions of the two clamping plates are opposite; a belt is arranged between the circular shaft and the rotating shaft; the second liquid level sensor and the motor are electrically connected with the third controller, the second liquid level sensor is arranged in the storage chamber, and the third controller and the motor are arranged on the side wall of the protective box; an output shaft of the motor is fixedly connected with the rotating shaft.
2. The chemical safety alarm device according to claim 1, wherein: the height of one side of the groove close to the side wall of the protective box is larger than that of one side of the groove far away from the side wall of the protective box.
3. The chemical safety alarm device according to claim 2, wherein: the transverse section is V-shaped, and the height of the joint of the transverse section and the cavity is greater than the height of the joint of the transverse section and the vertical section.
4. A chemical safety alarm device according to claim 3, wherein: the bottom of the clamping plate is provided with an arc-shaped groove attached to the pipeline, and the arc length of the arc-shaped groove is greater than the circumference of one half of the outer circle of the pipeline.
5. The chemical safety alarm device according to claim 4, wherein: the two sides of the top of the protective box are provided with vertical grooves, wedge blocks are connected in a sliding manner in the vertical grooves, springs are fixedly connected between the wedge blocks and the protective box, and transverse blocks are fixedly connected between the two wedge blocks; the clamping plates are provided with wedge surfaces for extruding wedge blocks, and the wedge surfaces on the two clamping plates are transversely opposite; the top of the clamping plate is provided with a limit groove for the wedge to extend into, the wedge is in sliding fit with the limit groove, and the limit groove is positioned on the movement track of the wedge.
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| CN202310354000.0A CN116085694B (en) | 2023-04-06 | 2023-04-06 | Alarm device for chemical engineering safety |
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| CN116085694B true CN116085694B (en) | 2023-08-22 |
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| CN217213927U (en) * | 2022-05-12 | 2022-08-16 | 翟梅玉 | Double prevention device for chemical safety |
| CN218348739U (en) * | 2022-07-07 | 2023-01-20 | 华能大庆热电有限公司 | Thermal power plant heating power pipe network is with preventing leaking equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100771203B1 (en) * | 2007-04-06 | 2007-10-29 | (주)도우기술협력회 | Water pipe having the water leakage sense |
| CN105221402A (en) * | 2015-11-06 | 2016-01-06 | 国家电网公司 | High voltage direct current converter valve constituent recycle pump leakage detection method and device |
| CN213420666U (en) * | 2020-11-13 | 2021-06-11 | 李楠 | A leak detection device for natural gas line operation maintenance |
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| CN116085694A (en) | 2023-05-09 |
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