CN115235705A - Chemical valve inner leakage detection device - Google Patents
Chemical valve inner leakage detection device Download PDFInfo
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- CN115235705A CN115235705A CN202211161266.5A CN202211161266A CN115235705A CN 115235705 A CN115235705 A CN 115235705A CN 202211161266 A CN202211161266 A CN 202211161266A CN 115235705 A CN115235705 A CN 115235705A
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- sealing
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- air bag
- pipe
- valve
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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
- G01M3/2876—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 valves
Abstract
The invention relates to the technical field of internal leakage detection, in particular to a chemical valve internal leakage detection device, which comprises: the pipeline sealing mechanism comprises a detection pipe and a pipe sealing plate which is arranged in the middle of the detection pipe and is used for enabling the detection pipe and the valve to form a closed pipeline; the pressure measuring mechanism comprises a first air bag assembly and a second air bag assembly, the first air bag assembly is arranged at the top of the pipeline sealing mechanism and can be in contact with air in the closed pipeline, the second air bag assembly is arranged above the first air bag assembly and is in contact with the external air environment, and the air in the first air bag assembly and the air in the second air bag assembly can be mutually communicated; and the synchronous component is fixedly arranged between the valve and the detection pipe and is used for opening and closing the valve and the pipe sealing plate simultaneously. The invention judges the occurrence of inner leakage through the change of the pressure in the pipe, has clear detection result, does not generate the conditions of leakage detection or detection error and the like, and can intercept leaked fluid in the detection process, thereby effectively preventing the subsequent influence caused by the leakage of the fluid in the pipe.
Description
Technical Field
The invention relates to the technical field of internal leakage detection, in particular to a chemical valve internal leakage detection device.
Background
The flow control means of the existing pipeline is usually controlled by a valve, however, the liquid valve and the gas valve have the possibility of internal leakage after being used for a long time, the internal leakage degree is small and small, and the internal leakage degree is usually small and large. Generally, the internal leakage is not easy to be discovered when the internal leakage is small, but sometimes serious consequences can be caused, such as the fields of thermal power generation, medicine manufacturing, gas transportation, chemical engineering and the like, and the internal leakage of liquid valves and gas valves in the fields can cause serious fire disasters, explosion accidents or unqualified medicine quality conditions, and is directly related to equipment and personal safety.
The patent with the publication number of CN107063581A in China discloses a valve internal leakage detection device and a detection method, wherein the valve internal leakage detection device comprises: the lower end of the shell is provided with an arc-shaped bottom surface which can be attached to the outer wall of the pipeline to be detected, and a temperature regulator is attached to the arc-shaped bottom surface; and the temperature sensor is provided with a first temperature measuring point and a second temperature measuring point, the second temperature measuring point is arranged at the lower part of the temperature regulator, and the first temperature measuring point is arranged on the arc-shaped bottom surface. According to the valve internal leakage detection device and the detection method, the pipeline near the valve is heated or cooled, the absolute value of the temperature change of the same point on the pipeline is measured, and whether the valve is internally leaked or not is detected in real time.
This patent has the following disadvantages: it judges whether interior hourglass of valve through the mode of measuring the difference in temperature, when external environment temperature changes, the temperature in the pipeline can produce certain change, hardly judges specifically because the temperature variation that interior hourglass leads to through temperature sensor this moment, still because the temperature variation that the environmental change leads to, when the valve is good probably can appear, the alarm of interior hourglass is sent to this detection device, and the pipeline that the wall thickness is thick also can be not obvious to the feedback of difference in temperature change moreover.
Disclosure of Invention
Based on this, it is necessary to provide a chemical industry is with leaking detection device in valve to prior art problem.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
the utility model provides a leak detection device in valve for chemical industry, includes:
the pipeline sealing mechanism comprises a detection pipe, a pipe sealing plate and a pipeline sealing plate, wherein two ends of the detection pipe are respectively connected with the valve and the pipeline;
the pressure measuring mechanism is movably arranged at the top of the pipeline sealing mechanism in a vertical state and used for detecting the change of the air pressure in the closed pipeline, and comprises a first air bag assembly and a second air bag assembly, wherein the first air bag assembly is arranged at the top of the pipeline sealing mechanism and can be contacted with the air in the closed pipeline, the second air bag assembly is arranged above the first air bag assembly and is contacted with the external air environment, and the air in the first air bag assembly and the air in the second air bag assembly can be mutually communicated;
and the synchronous component is fixedly arranged between the valve and the detection pipe and is used for opening and closing the valve and the pipe sealing plate simultaneously.
Further, the pipeline sealing mechanism further comprises:
the inner wall of the sealing strip can be abutted against the side wall of the pipe sealing plate;
the lower rotating shaft, the bottom of the tube sealing plate is formed with a lower positioning pin hole which is arranged in a vertical state, the bottom of the detection tube is formed with a fastening boss which is arranged in a vertical state, the lower positioning pin hole and the fastening boss are coaxially arranged, and the upper end of the lower rotating shaft penetrates through the fastening boss and is movably arranged in the lower positioning pin hole in a vertical state;
the lower anti-decompression cap is screwed at the bottom of the fastening boss, the bottom of the lower anti-decompression cap is abutted against the bottom of the lower rotating shaft, a lower sealing gasket which is horizontally arranged is arranged between the bottom of the fastening boss and the lower anti-decompression cap, the top of the lower sealing gasket is abutted against the fastening boss, and the bottom of the lower sealing gasket is abutted against the lower anti-decompression cap;
the detection tube comprises an upper hollow rotating shaft, a tube sealing plate and a detection tube, wherein an upper positioning pin groove which is arranged in a vertical state is formed in the top of the tube sealing plate, an installation boss which is arranged in a vertical state is formed in the top of the detection tube, the installation boss and the upper positioning pin groove are coaxially arranged, the lower end of the upper hollow rotating shaft penetrates through the installation boss and is fixedly arranged in the upper positioning pin groove in a vertical state, a limiting pressure plate which is arranged in a horizontal state is formed in the middle of the upper hollow rotating shaft, a first sealing ring which is arranged in a horizontal state is arranged between the limiting pressure plate and the installation boss, the bottom of the first sealing ring is abutted against the top of the installation boss, the top of the first sealing ring is abutted against the limiting pressure plate, a first air vent is formed in one side, close to a closed pipeline, of the bottom of the upper hollow rotating shaft, and a second air vent which is coaxially arranged with the first air vent is formed in the bottom of the upper positioning pin groove;
go up the anticreep and press the cap, locate the installation boss top soon, go up anticreep and press the cap top and inconsistent with spacing clamp plate top.
Further, pressure measurement mechanism is coaxial activity of vertical state and sets up in last hollow rotating shaft, and pressure measurement mechanism still including:
the guide sealing cylinder is coaxially and movably arranged in the upper hollow rotating shaft in a vertical state, a pressure measuring hole is formed in the center of the bottom of the guide sealing cylinder, a second sealing groove is formed in the bottom of the upper hollow rotating shaft, a second sealing ring is coaxially arranged in the second sealing groove, the bottom of the second sealing ring is abutted against the bottom of the upper hollow rotating shaft, and when the bottom of the guide sealing cylinder is abutted against the bottom of the upper hollow rotating shaft, the top of the second sealing ring is abutted against the bottom of the guide sealing cylinder and air passing through the first air vent cannot pass through the pressure measuring hole;
the gas guide seat is fixedly arranged at the top of the guide sealing cylinder, a first mounting groove is formed at the bottom of the gas guide seat, the guide sealing cylinder is spirally arranged in the first mounting groove, a third sealing groove is formed at the top of the first mounting groove, a detection sealing gasket is coaxially arranged in the third sealing groove, the top of the guide sealing cylinder 28 is abutted against the bottom of the detection sealing gasket, a gas guide pipe which is vertically arranged is formed at the middle of the gas guide seat, the first gas bag component is spirally arranged at the bottom of the gas guide pipe, and the second gas bag component is spirally arranged at the top of the gas guide pipe;
the protection casing, the shaping of air guide seat top has the second mounting groove, and the protection casing is vertical state and locates soon in the second mounting groove.
Further, the first airbag module is similar in structural composition to the second airbag module, and the first airbag module comprises:
the air bag joint is vertically and rotatably arranged at the bottom of the air guide pipe;
the testing air bag is fixedly arranged at the bottom of the air bag connector, and the top of the testing air bag is communicated with the air bag connector;
the air bag nozzle penetrates through the test air bag in a vertical state to be fixedly arranged at the bottom of the air bag connector, a round pressure head arranged in the test air bag is formed at the bottom of the air bag nozzle, and the round pressure head and the air bag connector jointly support the top of the test air bag tightly.
Further, the pressure measuring mechanism is fixed including being vertical state and setting up in the range finding sensor at protection casing top, and range finding sensor's output passes the inside output of protection casing, and the shaping of protection casing top has the sensing fixed orifices of installation range finding sensor, and the shaping of protection casing lower extreme has a plurality of constant voltage gas pockets.
Furthermore, a step threaded hole is formed in the outer wall of the upper half part of the upper hollow rotating shaft, a limiting bolt is arranged in the step threaded hole in a screwed mode, one end of the limiting bolt penetrates through the step threaded hole to be output inwards, a transverse U-shaped sliding groove capable of enabling the limiting bolt to slide is formed in the side wall of the guide sealing cylinder, a third sealing ring is arranged in the step threaded hole and used for sealing the step threaded hole, two fourth sealing grooves are formed in the upper half part of the inner portion of the upper hollow rotating shaft and located on the upper side and the lower side of the step threaded hole respectively, and a fourth sealing ring is arranged in each of the two fourth sealing grooves and used for sealing air permeating out of the U-shaped sliding groove.
Further, the synchronization component comprises:
the first crescent plate is coaxially and fixedly arranged at the top of the detection tube, and one side of the first crescent plate is abutted against the inner wall of a flange at the joint of the detection tube and the valve;
the second February tooth plate is coaxially and fixedly arranged at the top of the valve, and one side of the second February tooth plate is abutted against the inner wall of a flange at the joint of the valve and the detection pipe;
the adapter shaft is arranged at the top of the detection tube in a vertical state, the bottom of the adapter shaft is abutted to the flange of the detection tube, two fixed cutting grooves which are symmetrically arranged are formed in the lower end of the adapter shaft, and the two fixed cutting grooves are fixedly connected with the first crescent plate and the second crescent plate respectively.
Further, the synchronization component further comprises:
the pressure bearing is movably sleeved in the middle of the transfer shaft in a horizontal state;
the adapter rod is movably sleeved on the upper half part of the adapter shaft, and the bottom of the adapter rod is abutted against the top of the pressure bearing;
the anti-drop is revolved the cap, and rotatory locating changes the spiale top, and anti-drop revolves cap bottom and contradicts with the spiale top.
Further, the synchronization component further comprises:
the synchronous turntable is fixedly sleeved at the top of the upper hollow rotating shaft, a vertical synchronous sliding handle is formed at the top of the synchronous turntable, and a first waist-shaped groove for the synchronous sliding handle to slide is formed at one end of the adapter rod;
the arc-shaped cross plate is horizontally arranged below the valve switch and is fixedly connected with the valve switch by a plurality of pipe clamps;
the synchronizing pin is vertically and fixedly arranged at one end, close to the adapter rod, of the arc-shaped cross plate, and a second waist-shaped groove capable of allowing the synchronizing pin to slide is formed in the other end of the adapter rod.
Furthermore, an air inlet hole which is arranged in a horizontal state is formed on the side wall of the air guide seat, and an inflating nozzle which is arranged in a horizontal state is arranged in the air inlet hole.
Compared with the prior art, the invention has the beneficial effects that:
the valve internal leakage detection device for the chemical engineering judges the occurrence of internal leakage through the change of pressure in the pipe, the pressure in the pipe continuously changes along with the continuous internal leakage, the detection result is obvious, and the conditions of leakage detection or detection errors and the like cannot occur;
secondly, the chemical valve inner leakage detection device can intercept leaked fluid in the detection process, and effectively prevents subsequent influence caused by fluid leakage in the pipe.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is an exploded perspective view of the synchronizing assembly of the present invention;
FIG. 5 is an exploded perspective view of the line sealing mechanism and pressure measurement mechanism of the present invention;
FIG. 6 is an exploded perspective view of the load cell mechanism of the present invention;
FIG. 7 is an exploded perspective view of a first airbag assembly of the present invention;
FIG. 8 isbase:Sub>A half sectional view taken at A-A of FIG. 3;
FIG. 9 is a half sectional view taken at B-B of FIG. 3;
fig. 10 is a partial schematic view of fig. 8 at a.
The reference numbers in the figures are: 1. a pipeline sealing mechanism; 2. a detection tube; 3. fastening the boss; 4. mounting a boss; 5. a sealing strip; 6. a tube sealing plate; 7. a lower positioning pin hole; 8. an upper locating pin slot; 9. a lower rotating shaft; 10. a lower anti-dropping pressure cap; 11. a lower seal gasket; 12. an upper hollow rotating shaft; 13. a limiting pressure plate; 14. a first air vent; 15. a second air hole; 16. a first seal groove; 17. a second seal groove; 18. a third seal groove; 19. a fourth seal groove; 20. a first seal ring; 21. a second seal ring; 22. a third seal ring; 23. a fourth seal ring; 24. step threaded holes; 25. an anti-dropping pressure cap is arranged; 26. a limit bolt; 27. a pressure measuring mechanism; 28. a guide sealing cylinder; 29. a pressure measuring hole; 30. a U-shaped sliding groove; 31. a gas guide seat; 32. a first mounting groove; 33. a gas-guide tube; 34. a second mounting groove; 35. an air inlet; 36. detecting a sealing gasket; 37. an air charging nozzle; 38. a first airbag module; 39. testing the air bag; 40. an air bag nozzle; 41. a pressure head; 42. an air bag joint; 43. a second airbag module; 44. a protective cover; 45. constant pressure air holes; 46. a sensing fixing hole; 47. a ranging sensor; 48. a synchronization component; 49. a first crescent plate; 50. a transfer shaft; 51. fixing the cutting groove; 52. a pressure bearing; 53. a transfer lever; 54. a first waist-shaped groove; 55. a second waist-shaped groove; 56. the anti-drop screw cap; 57. a synchronous turntable; 58. a synchronous sliding handle; 59. an arc-shaped cross plate; 60. a synchronizing pin; 61. a pipe clamp; 62. and a second February tooth plate.
Detailed Description
For a better understanding of the features and technical solutions of the present invention, as well as the specific objects and functions attained by the present invention, reference is made to the accompanying drawings and detailed description of the invention.
Referring to fig. 1 to 10, an internal leakage detecting apparatus for a chemical valve includes: the pipeline sealing mechanism 1 comprises a detection pipe 2 with two ends respectively connected with a valve and a pipeline, and a pipe sealing plate 6 which is movably arranged in the middle of the detection pipe 2 in a vertical state and is used for enabling the detection pipe 2 and the valve to form a closed pipeline; the pressure measuring mechanism 27 is vertically and movably arranged at the top of the pipeline sealing mechanism 1 and used for detecting the change of the air pressure in the closed pipeline, and comprises a first air bag component 38 which is arranged at the top of the pipeline sealing mechanism 1 and can be contacted with the air in the closed pipeline, and a second air bag component 43 which is arranged above the first air bag component 38 and is contacted with the external air environment, wherein the air in the first air bag component 38 and the air in the second air bag component 43 can be mutually communicated; and a synchronizing assembly 48 fixedly disposed between the valve and the sensing tube 2 for opening and closing the valve and the tube sealing plate 6 at the same time.
Add one section test tube 2 between valve and pipeline, set up one in test tube 2 and can be with test tube 2 confined pipe closing plate 6, pipe closing plate 6 passes through synchronous subassembly 48 and valve synchronous switch, when the valve is closed, pipe closing plate 6 seals test tube 2, make pipe closing plate 6 and valve form a closed pipeline jointly, rethread pressure measuring mechanism 27 real-time supervision this closed pipeline in the air pressure change, when leaking in the valve, the liquid or the gas of valve other end can constantly get into closed pipeline, the air in the closed pipeline constantly receives the compression, the air pressure increase, first gasbag subassembly 38 receives the compression, the air in first gasbag subassembly 38 gets into second gasbag subassembly 43, second gasbag subassembly 43 volume takes place the persistence and changes and is monitored.
Further, the pipeline sealing mechanism 1 further includes: the inner wall of the detection tube 2 is provided with a first sealing groove 16 which is coaxial with the detection tube 2, the sealing strip 5 is coaxially arranged in the first sealing groove 16, and the inner wall of the sealing strip 5 can be abutted against the side wall of the tube sealing plate 6; the lower rotating shaft 9, the bottom of the tube sealing plate 6 is formed with a lower positioning pin hole 7 which is arranged in a vertical state, the bottom of the detection tube 2 is formed with a fastening boss 3 which is arranged in a vertical state, the lower positioning pin hole 7 and the fastening boss 3 are coaxially arranged, and the upper end of the lower rotating shaft 9 penetrates through the fastening boss 3 and is movably arranged in the lower positioning pin hole 7 in a vertical state; the lower anti-pressing-off cap 10 is rotatably arranged at the bottom of the fastening boss 3, the bottom of the lower anti-pressing-off cap 10 is abutted against the bottom of the lower rotating shaft 9, a lower sealing gasket 11 in a horizontal state is arranged between the bottom of the fastening boss 3 and the lower anti-pressing-off cap 10, the top of the lower sealing gasket 11 is abutted against the fastening boss 3, and the bottom of the lower sealing gasket is abutted against the lower anti-pressing-off cap 10; an upper hollow rotating shaft 12, an upper positioning pin groove 8 which is arranged in a vertical state is formed at the top of a tube sealing plate 6, an installation boss 4 which is arranged in a vertical state is formed at the top of a detection tube 2, the installation boss 4 and the upper positioning pin groove 8 are coaxially arranged, the lower end of the upper hollow rotating shaft 12 penetrates through the installation boss 4 and is fixedly arranged in the upper positioning pin groove 8 in a vertical state, a limit pressure plate 13 which is arranged in a horizontal state is formed at the middle of the upper hollow rotating shaft 12, a first seal ring 20 which is arranged in a horizontal state is arranged between the limit pressure plate 13 and the installation boss 4, the bottom of the first seal ring 20 is abutted against the top of the installation boss 4, the top is abutted against the limit pressure plate 13, a first vent hole 14 is formed at one side, close to a closed pipeline, of the bottom of the upper hollow rotating shaft 12, and a second vent hole 15 which is coaxially arranged with the first vent hole 14 is formed at the bottom of the upper positioning pin groove 8; go up anticreep and press cap 25, locate the installation boss 4 top soon, go up anticreep and press cap 25 top and spacing clamp plate 13 top inconsistent.
The tube sealing plate 6 can rotate around the lower rotating shaft 9 under the action of the lower rotating shaft 9 and the upper hollow rotating shaft 12, the sealing of the pipeline is realized under the action of the sealing strip 5, the upper side and the lower side of the detection tube 2 are also sealed by the first sealing ring 20 and the lower sealing gasket 11, and when the tube sealing plate 6 seals the detection tube 2, air in the closed pipeline can only permeate outwards through the first air holes 14 and the second air holes 15.
Further, the pressure measuring mechanism 27 is a vertical coaxial movable installation in the upper hollow rotating shaft 12, and the pressure measuring mechanism 27 further includes: the guide sealing cylinder 28 is coaxially and movably arranged in the upper hollow rotating shaft 12 in a vertical state, a pressure measuring hole 29 is formed in the center of the bottom of the guide sealing cylinder 28, a second sealing groove 17 is formed in the bottom of the upper hollow rotating shaft 12, a second sealing ring 21 is coaxially arranged in the second sealing groove 17, the bottom of the second sealing ring 21 is abutted against the bottom of the upper hollow rotating shaft 12, and when the bottom of the guide sealing cylinder 28 is abutted against the bottom of the upper hollow rotating shaft 12, the top of the second sealing ring 21 is abutted against the bottom of the guide sealing cylinder 28 and air passing through the first air holes 14 cannot pass through the pressure measuring hole 29; the air guide seat 31 is fixedly arranged at the top of the guide sealing cylinder 28, a first mounting groove 32 is formed at the bottom of the air guide seat 31, the guide sealing cylinder 28 is rotatably arranged in the first mounting groove 32, a third sealing groove 18 is formed at the top of the first mounting groove 32, a detection sealing gasket 36 is coaxially arranged in the third sealing groove 18, the top of the guide sealing cylinder 28 is abutted against the bottom of the detection sealing gasket 36, an air guide pipe 33 which is vertically arranged is formed in the middle of the air guide seat 31, the first air bag component 38 is rotatably arranged at the bottom of the air guide pipe 33, and the second air bag component 43 is rotatably arranged at the top of the air guide pipe 33; the protection cover 44 and the top of the air guide seat 31 are formed with a second installation groove 34, and the protection cover 44 is vertically and rotatably arranged in the second installation groove 34.
The guide sealing cylinder 28 is arranged at the bottom of the air guide seat 31 in a rotating manner, the first air bag assembly 38 is arranged at the bottom of the air guide tube 33 in a rotating manner, namely, the first air bag assembly 38 is fixedly arranged in the guide sealing cylinder 28, the guide sealing cylinder 28 is abutted to the detection sealing gasket 36 at the bottom of the air guide seat 31, the guide sealing cylinder 28 is movably arranged in the upper hollow rotating shaft 12, when detection is carried out, air in a closed pipeline passes through the first air hole 14 and the second air hole 15 and then enters the guide sealing cylinder 28 through the pressure measuring hole 29, when detection is not carried out, the bottom of the guide sealing cylinder 28 and the bottom of the upper hollow rotating shaft 12 prevent the air in the pipeline from entering the guide sealing cylinder 28 through the pressure measuring hole 29 through the second sealing ring 21, the second air bag assembly 43 is arranged at the top of the air guide tube 33 in a rotating manner, the protective cover 44 is arranged at the top of the air guide seat 31 in a rotating manner, namely, the second air bag assembly 43 is fixedly arranged in the protective cover 44, and the protective cover 44 can effectively prevent adverse factors of external environment, such as wind, rain and snow from influencing the second air bag assembly 43.
Further, the first airbag module 38 is similar in structure and composition to the second airbag module 43, and the first airbag module 38 includes: an air bag joint 42 which is vertically screwed at the bottom of the air duct 33; the test air bag 39 is fixedly arranged at the bottom of the air bag joint 42, and the top of the test air bag 39 is communicated with the air bag joint 42; the air bag nozzle 40 penetrates through the testing air bag 39 in a vertical state and is fixedly arranged at the bottom of the air bag joint 42, a circular pressure head 41 arranged in the testing air bag 39 is formed at the bottom of the air bag nozzle 40, and the circular pressure head 41 and the air bag joint 42 together support the top of the testing air bag 39 tightly.
The mouth of the test airbag 39 is clamped by the airbag mouth 40 and the airbag connection 42 so that the test airbag 39 can only be ventilated from the airbag connection 42.
Further, the pressure measuring mechanism 27 further comprises a distance measuring sensor 47 which is vertically and fixedly arranged at the top of the protective cover 44, an output end of the distance measuring sensor 47 penetrates through the protective cover 44 to be output inwards, a sensing fixing hole 46 for mounting the distance measuring sensor 47 is formed in the top of the protective cover 44, and a plurality of constant pressure air holes 45 are formed in the lower end of the protective cover 44.
Distance measuring sensor 47 at the top of protection casing 44 detects the test gasbag 39 of second gasbag subassembly 43 in real time and distance measuring sensor 47 and gives the host computer (prior art, not shown in the figure) with the signal transmission, if the valve appears interior hourglass, the atmospheric pressure in the closed pipeline increases gradually, air can be extruded in the second gasbag subassembly 43 in the first gasbag subassembly 38, the test gasbag 39 of second gasbag subassembly 43 can continue the inflation, host computer (prior art, not shown in the figure) can detect this test gasbag 39 and distance measuring sensor 47's interval and continue to shrink, the constant voltage gas pocket 45 of protection casing 44 can make the interior air of protection casing 44 exchange with the outside air, it can not change along with the shrink inflation of inside test gasbag 39 to keep the atmospheric pressure in the protection casing 44.
Further, a step threaded hole 24 is formed in the outer wall of the upper half portion of the upper hollow rotating shaft 12, a limiting bolt 26 is arranged in the step threaded hole 24 in a screwed mode, one end of the limiting bolt 26 penetrates through the step threaded hole 24 to be output inwards, a transverse U-shaped sliding groove 30 capable of allowing the limiting bolt 26 to slide is formed in the side wall of the guide sealing cylinder 28, a third sealing ring 22 is arranged in the step threaded hole 24 and used for sealing the step threaded hole 24, two fourth sealing grooves 19 are formed in the upper half portion of the inner portion of the upper hollow rotating shaft 12, the two fourth sealing grooves 19 are respectively located on the upper side and the lower side of the step threaded hole 24, and a fourth sealing ring 23 is arranged in each of the two fourth sealing grooves 19 and used for sealing air permeating into the U-shaped sliding groove 30.
The limiting bolt 26 can slide in the U-shaped sliding groove 30, the position of the guiding sealing cylinder 28 is adjusted and fixed by rotating and lifting the guiding sealing cylinder 28, so that the limiting bolt 26 is fixed on the upper side or the lower side of the U-shaped sliding groove 30, when the limiting bolt 26 stops at the upper side of the U-shaped sliding groove 30, the bottom of the guiding sealing cylinder 28 is in contact with the bottom of the upper hollow rotating shaft 12, air in a closed pipeline cannot enter the guiding sealing cylinder 28 through the pressure measuring hole 29 under the action of the second sealing ring 21, the pressure measuring mechanism 27 stops working, when the limiting bolt 26 stops at the lower side of the U-shaped sliding groove 30, air in the closed pipeline enters the guiding sealing cylinder 28 through the pressure measuring hole 29, the pressure measuring mechanism 27 works, the two fourth sealing rings 23 enable no air leakage to occur between the inner wall of the upper hollow rotating shaft 12 and the outer wall of the guiding sealing cylinder 28, it is ensured that air entering the upper hollow rotating shaft 12 from the first air vent 14 can enter the guiding sealing cylinder 28 through the pressure measuring hole 29, the top of the guiding sealing cylinder 28 is in contact with the detection sealing gasket 36, air bag, air leakage is ensured that air leaks from the sealing assembly 24 only formed in the guiding sealing cylinder 24 under the action of the first sealing groove 24, and the sealing gasket 24, and the air bag leakage test is also performed when only one sealing step sealing valve is formed in the third sealing cylinder 24.
Further, the synchronization module 48 includes: the first crescent plate 49 is coaxially and fixedly arranged at the top of the detection tube 2, and one side of the first crescent plate 49 is abutted against the inner wall of a flange at the joint of the detection tube 2 and the valve; the second February tooth plate 62 is coaxially and fixedly arranged at the top of the valve, and one side of the second February tooth plate 62 is abutted against the inner wall of a flange at the joint of the valve and the detection pipe 2; the adapter shaft 50 is vertically arranged at the top of the detection tube 2, the bottom of the adapter shaft 50 is abutted to the flange of the detection tube 2, two fixing cutting grooves 51 which are symmetrically arranged are formed at the lower end of the adapter shaft 50, and the two fixing cutting grooves 51 are fixedly connected with the first crescent plate 49 and the second crescent plate 62 respectively.
The first crescent plate 49 and the second crescent plate 62 abut against the fixing notch 51 at the bottom of the coupling shaft 50 from both sides along with the connection of the valve and the test tube 2, and fix the coupling shaft 50 from both sides such that the coupling shaft 50 cannot move or rotate.
Further, the synchronization module 48 further includes: a pressure bearing 52 movably sleeved in the middle of the transfer shaft 50 in a horizontal state; the adapter rod 53 is movably sleeved on the upper half part of the adapter shaft 50, and the bottom of the adapter rod 53 is abutted against the top of the pressure bearing 52; the anti-drop is revolved cap 56 and is rotatablely arranged on the top of the adapting shaft 50, and the bottom of the anti-drop is revolved cap 56 and is propped against the top of the adapting shaft 50.
The middle of the top of the rotating shaft 50 is provided with a pressure bearing 52, the top of the pressure bearing 52 is provided with a rotating rod 53, the rotating rod 53 can rotate around the rotating shaft 50, and an anti-falling rotating cap 56 arranged at the top of the rotating shaft 50 in a rotating mode can prevent the rotating rod 53 from falling off the rotating shaft 50 from the top.
Further, the synchronization component 48 further includes: the synchronous turntable 57 is fixedly sleeved at the top of the upper hollow rotating shaft 12, a vertical synchronous sliding handle 58 is formed at the top of the synchronous turntable 57, and a first waist-shaped groove 54 for the synchronous sliding handle 58 to slide is formed at one end of the adapter rod 53; the arc-shaped cross plate 59 is horizontally arranged below the valve switch, and the arc-shaped cross plate 59 is fixedly connected with the valve switch by a plurality of pipe clamps 61; the synchronizing pin 60 is vertically and fixedly arranged at one end of the arc-shaped cross plate 59 close to the adapter rod 53, and a second waist-shaped groove 55 for the synchronizing pin 60 to slide is formed at the other end of the adapter rod 53.
The pipe clamp 61 fixedly connects the arc-shaped cross plate 59 with the valve switch, the arc-shaped cross plate 59 is fixedly connected with the synchronizing pin 60, when the valve switch rotates, the synchronizing pin 60 rotates along with the valve switch, the synchronizing pin 60 can slide in the second waist-shaped groove 55 of the adapting rod 53, the adapting rod 53 can rotate around the adapting shaft 50, when the synchronizing pin 60 rotates along with the valve switch, the adapting rod 53 synchronously rotates around the adapting shaft 50, and the synchronous sliding handle 58 with the other end in the first waist-shaped groove 54 rotates along with the rotation of the adapting rod 53.
Further, an air inlet 35 is formed on the sidewall of the air guide seat 31 in a horizontal state, and an air charging nozzle 37 is disposed in the air inlet 35 in a horizontal state.
After the first airbag module 38 and the second airbag module 43 are both mounted on the air guide seat 31, in order to ensure a certain air pressure inside the two test airbags 39, the two test airbags 39 are simultaneously inflated through the inflation nozzle 37, so that the two test airbags obtain the same initial air pressure.
A section of detection tube 2 is added between the valve and the pipeline, a tube sealing plate 6 capable of sealing the detection tube 2 is arranged in the detection tube 2, the tube sealing plate 6 is synchronously opened or closed along with the valve under the action of an adapter rod 53, a synchronous pin 60 and a synchronous turntable 57, before the valve is opened, the position of a guide sealing cylinder 28 is adjusted, so that a limit bolt 26 stops at the lower side of a U-shaped sliding groove 30, gas or liquid in the pipeline cannot enter the guide sealing cylinder 28 through a pressure measuring hole 29 under the action of a second sealing ring 21, a test air bag 39 in a first air bag assembly 38 cannot be changed, and a pressure measuring mechanism 27 stops working; after the valve is closed, the position of the guide sealing cylinder 28 is adjusted, so that the limiting bolt 26 stops at the lower side of the U-shaped sliding groove 30, the air in the closed pipeline is communicated with the air in the guide sealing cylinder 28 through the pressure measuring hole 29, the pressure measuring mechanism 27 starts to work, if no internal leakage occurs in the valve, the first air bag assembly 38 only changes at the moment when the pressure measuring mechanism 27 starts to work, the duration is short, and the valve cannot shrink at the later stage; if the valve has internal leakage, gas or liquid on the other side of the valve enters a closed pipeline, the pressure in the closed pipeline is increased, air is compressed, a test air bag 39 in a first air bag assembly 38 is compressed by air, the air in the first air bag assembly 38 passes through an air guide pipe 33 and enters a second air bag assembly 43, the test air bag 39 of the second air bag assembly 43 continuously expands along with the continuous internal leakage, a distance measuring sensor 47 monitors the distance between the test air bag 39 of the second air bag assembly 43 and the distance measuring sensor 47 and transmits the distance to an upper computer (the prior art and the illustration are omitted), and when the upper computer (the prior art and the illustration are omitted) detects that the distance is continuously reduced, the internal leakage of the valve is judged and an alarm is given; when the pipeline is closed, the air pressure in the closed pipeline is relatively larger than that of the outside air, the test air bag 39 of the first air bag assembly 38 has an initial compression amount, the corresponding test air bag 39 of the second air bag assembly 43 has an initial expansion amount, and when the test air bag 39 of the second air bag assembly 43 contracts after the pressure measuring mechanism 27 starts to work, the whole detection device has the problem of tightness and needs to be overhauled.
The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a leak detection device in valve for chemical industry which characterized in that includes:
the pipeline sealing mechanism (1) comprises a detection pipe (2) with two ends respectively connected with the valve and the pipeline, and a pipe sealing plate (6) which is movably arranged in the middle of the detection pipe (2) in a vertical state and is used for enabling the detection pipe (2) and the valve to form a closed pipeline;
the pressure measuring mechanism (27) is vertically and movably arranged at the top of the pipeline sealing mechanism (1) and used for detecting the change of the air pressure in the closed pipeline, and comprises a first air bag assembly (38) which is arranged at the top of the pipeline sealing mechanism (1) and can be contacted with the air in the closed pipeline and a second air bag assembly (43) which is arranged above the first air bag assembly (38) and is contacted with the external air environment, and the air in the first air bag assembly (38) and the air in the second air bag assembly (43) can be mutually communicated;
and the synchronous component (48) is fixedly arranged between the valve and the detection pipe (2) and is used for opening and closing the valve and the pipe sealing plate (6) simultaneously.
2. The valve internal leakage detection device for chemical engineering according to claim 1, wherein the pipeline sealing mechanism (1) further comprises:
the inner wall of the detection pipe (2) is formed with a first sealing groove (16) coaxial with the detection pipe (2), the sealing strip (5) is coaxially arranged in the first sealing groove (16), and the inner wall of the sealing strip (5) can be abutted against the side wall of the pipe sealing plate (6);
the lower rotating shaft (9), a lower positioning pin hole (7) which is arranged in a vertical state is formed at the bottom of the pipe sealing plate (6), a fastening boss (3) which is arranged in a vertical state is formed at the bottom of the detection pipe (2), the lower positioning pin hole (7) and the fastening boss (3) are coaxially arranged, and the upper end of the lower rotating shaft (9) penetrates through the fastening boss (3) and is movably arranged in the lower positioning pin hole (7) in a vertical state;
the lower anti-dropping pressure cap (10) is rotatably arranged at the bottom of the fastening boss (3), the bottom of the lower anti-dropping pressure cap (10) is abutted against the bottom of the lower rotating shaft (9), a lower sealing gasket (11) which is horizontally arranged is arranged between the bottom of the fastening boss (3) and the lower anti-dropping pressure cap (10), the top of the lower sealing gasket (11) is abutted against the fastening boss (3), and the bottom of the lower sealing gasket is abutted against the lower anti-dropping pressure cap (10);
an upper hollow rotating shaft (12), an upper positioning pin groove (8) which is arranged in a vertical state is formed in the top of a pipe sealing plate (6), an installation boss (4) which is arranged in a vertical state is formed in the top of a detection pipe (2), the installation boss (4) and the upper positioning pin groove (8) are coaxially arranged, the lower end of the upper hollow rotating shaft (12) penetrates through the installation boss (4) and is fixedly arranged in the upper positioning pin groove (8) in a vertical state, a limiting pressure plate (13) which is arranged in a horizontal state is formed in the middle of the upper hollow rotating shaft (12), a first sealing ring (20) which is arranged in a horizontal state is arranged between the limiting pressure plate (13) and the installation boss (4), the bottom of the first sealing ring (20) is abutted against the top of the installation boss (4), the top of the limiting pressure plate (13) is abutted against the top, a first vent hole (14) is formed in one side, close to a closed pipeline, and a second vent hole (15) which is coaxially arranged with the first vent hole (14) is formed in the bottom of the upper positioning pin groove (8);
go up anticreep and press cap (25), locate installation boss (4) top soon, go up anticreep and press cap (25) top and spacing clamp plate (13) top inconsistent.
3. The chemical valve internal leakage detection device according to claim 2, wherein the pressure measurement mechanism (27) is coaxially and movably arranged in the upper hollow rotating shaft (12) in a vertical state, and the pressure measurement mechanism (27) further comprises:
the guide sealing cylinder (28) is coaxially and movably arranged in the upper hollow rotating shaft (12) in a vertical state, a pressure measuring hole (29) is formed in the center of the bottom of the guide sealing cylinder (28), a second sealing groove (17) is formed in the bottom of the upper hollow rotating shaft (12), a second sealing ring (21) is coaxially arranged in the second sealing groove (17), the bottom of the second sealing ring (21) is abutted to the bottom of the upper hollow rotating shaft (12), and when the bottom of the guide sealing cylinder (28) is abutted to the bottom of the upper hollow rotating shaft (12), the top of the second sealing ring (21) is abutted to the bottom of the guide sealing cylinder (28) and air passing through the first air hole (14) cannot pass through the pressure measuring hole (29);
the gas guide seat (31) is fixedly arranged at the top of the guide sealing cylinder (28), a first mounting groove (32) is formed at the bottom of the gas guide seat (31), the guide sealing cylinder (28) is rotatably arranged in the first mounting groove (32), a third sealing groove (18) is formed at the top of the first mounting groove (32), a detection sealing gasket (36) is coaxially arranged in the third sealing groove (18), the top of the guide sealing cylinder (28) is abutted to the bottom of the detection sealing gasket (36), a gas guide pipe (33) which is set in a vertical state is formed in the middle of the gas guide seat (31), the first gas bag component (38) is rotatably arranged at the bottom of the gas guide pipe (33), and the second gas bag component (43) is rotatably arranged at the top of the gas guide pipe (33);
protection casing (44), air guide seat (31) top shaping has second mounting groove (34), and protection casing (44) are vertical state and locate soon in second mounting groove (34).
4. The valve internal leakage detection device for chemical engineering according to claim 3, wherein the first airbag module (38) and the second airbag module (43) are similar in structure and composition, and the first airbag module (38) comprises:
the air bag joint (42) is vertically and rotatably arranged at the bottom of the air guide pipe (33);
the testing air bag (39) is fixedly arranged at the bottom of the air bag joint (42), and the top of the testing air bag (39) is communicated with the air bag joint (42);
the air bag nozzle (40) penetrates through the testing air bag (39) in a vertical state and is fixedly arranged at the bottom of the air bag joint (42), a circular pressure head (41) arranged in the testing air bag (39) is formed at the bottom of the air bag nozzle (40), and the circular pressure head (41) and the air bag joint (42) jointly support the top of the testing air bag (39) tightly.
5. The chemical valve internal leakage detection device according to claim 4, wherein the pressure measuring mechanism (27) further comprises a distance measuring sensor (47) which is fixedly arranged at the top of the protective cover (44) in a vertical state, an output end of the distance measuring sensor (47) penetrates through the protective cover (44) to be output inwards, a sensing fixing hole (46) for mounting the distance measuring sensor (47) is formed at the top of the protective cover (44), and a plurality of constant pressure air holes (45) are formed at the lower end of the protective cover (44).
6. The chemical valve internal leakage detection device according to claim 5, wherein a step threaded hole (24) is formed in the outer wall of the upper half portion of the upper hollow rotating shaft (12), a limit bolt (26) is screwed in the step threaded hole (24), one end of the limit bolt (26) penetrates through the step threaded hole (24) and is output inwards, a transverse U-shaped sliding groove (30) capable of allowing the limit bolt (26) to slide is formed in the side wall of the guide sealing cylinder (28), a third sealing ring (22) used for sealing the step threaded hole (24) is arranged in the step threaded hole (24), two fourth sealing grooves (19) are formed in the upper half portion of the inner portion of the upper hollow rotating shaft (12), the two fourth sealing grooves (19) are respectively located on the upper side and the lower side of the step threaded hole (24), and a fourth sealing ring (23) used for sealing air penetrating through the U-shaped sliding groove (30) is arranged in each of the two fourth sealing grooves (19).
7. The chemical valve internal leakage detection device according to claim 6, wherein the synchronization module (48) comprises:
the first crescent plate (49) is coaxially and fixedly arranged at the top of the detection pipe (2), and one side of the first crescent plate (49) is abutted against the inner wall of a flange at the joint of the detection pipe (2) and the valve;
the second February tooth plate (62) is coaxially and fixedly arranged at the top of the valve, and one side of the second February tooth plate (62) is abutted against the inner wall of a flange at the joint of the valve and the detection pipe (2);
the rotary connecting shaft (50) is arranged at the top of the detection tube (2) in a vertical state, the bottom of the rotary connecting shaft (50) is abutted to a flange of the detection tube (2), two fixed cutting grooves (51) which are symmetrically arranged are formed at the lower end of the rotary connecting shaft (50), and the two fixed cutting grooves (51) are fixedly connected with the first crescent plate (49) and the second crescent plate (62) respectively.
8. The valve internal leakage detection device for chemical engineering according to claim 7, wherein the synchronization module (48) further comprises:
the pressure bearing (52) is movably sleeved in the middle of the transfer shaft (50) in a horizontal state;
the adapter rod (53) is movably sleeved on the upper half part of the adapter shaft (50), and the bottom of the adapter rod (53) is abutted against the top of the pressure bearing (52);
the anti-dropping rotating cap (56) is rotatably arranged at the top of the rotating connecting shaft (50), and the bottom of the anti-dropping rotating cap (56) is propped against the top of the rotating connecting shaft (50).
9. The chemical valve internal leakage detection device according to claim 8, wherein the synchronization module (48) further comprises:
the synchronous turntable (57) is fixedly sleeved at the top of the upper hollow rotating shaft (12), a vertical synchronous sliding handle (58) is formed at the top of the synchronous turntable (57), and a first waist-shaped groove (54) for the synchronous sliding handle (58) to slide is formed at one end of the adapter rod (53);
the arc-shaped cross plate (59) is horizontally arranged below the valve switch, and the arc-shaped cross plate (59) is fixedly connected with the valve switch by a plurality of pipe clamps (61);
the synchronizing pin (60) is vertically and fixedly arranged at one end, close to the adapter rod (53), of the arc-shaped cross plate (59), and a second waist-shaped groove (55) capable of allowing the synchronizing pin (60) to slide is formed at the other end of the adapter rod (53).
10. The chemical valve internal leakage detection device according to claim 3, wherein an air inlet hole (35) is formed on the side wall of the air guide seat (31) in a horizontal state, and an air charging nozzle (37) is arranged in the air inlet hole (35) in the horizontal state.
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| CN202211161266.5A CN115235705B (en) | 2022-09-23 | 2022-09-23 | Chemical valve inner leakage detection device |
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| CN202211161266.5A CN115235705B (en) | 2022-09-23 | 2022-09-23 | Chemical valve inner leakage detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116734035A (en) * | 2023-08-16 | 2023-09-12 | 菏泽市金沃泰化工有限公司 | Chemical valve inner leakage detection device and application method thereof |
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| CN115235705B (en) | 2023-01-20 |
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