CN115524070B - High-precision valve seal detection device and detection method - Google Patents
High-precision valve seal detection device and detection method Download PDFInfo
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- CN115524070B CN115524070B CN202211491124.5A CN202211491124A CN115524070B CN 115524070 B CN115524070 B CN 115524070B CN 202211491124 A CN202211491124 A CN 202211491124A CN 115524070 B CN115524070 B CN 115524070B
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/086—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for valves
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a high-precision valve seal detection device which comprises a device main body, wherein a refrigerator is arranged at the front end face of the bottom of the device main body and consists of a compressor, a condenser, a capillary tube and an evaporator, the inner cavity of the device main body is continuously refrigerated, a rodless cylinder is vertically arranged in the device main body, and the lower end of the rodless cylinder is fixed with the bottom surface of the device main body through a base. According to the high-precision valve sealing detection device and the high-precision valve sealing detection method, the influence of low temperature on a valve is considered when a sealing test is carried out, a refrigerator is added, a low-temperature environment is firstly built around the valve, and cold air is collected and supplied through the air supply device and is directly and continuously conveyed to the sealing gasket of the valve plate, so that whether the sealing gasket is contracted or not can generate an air leakage phenomenon is checked, the detection effect of the valve is ensured, the detection means are enriched, the device is applicable to different working conditions, and a better use prospect is brought.
Description
Technical Field
The invention relates to the field of valve seal detection, in particular to a high-precision valve seal detection device and a detection method.
Background
The valve is a pipeline accessory for opening and closing a pipeline, controlling the flow direction, adjusting and controlling parameters (temperature, pressure and flow) of a conveying medium, is a control component in a fluid conveying system, and has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflow pressure relief and the like; the sealing performance of the valve is a very important function of valve quality, and almost all valve product standards use valve tightness as a very important detection control item.
In the process of detecting the air tightness of the valve, the conventional test method and steps are as follows: closing two ends of a flow channel of a valve to be tested, pressing a packing gland, enabling the valve to be tested to be partially opened and put into water, inflating the valve to be tested and gradually pressurizing to test pressure, and checking whether the shell is permeated or not after the specified time is reached.
The detection method has certain defects, firstly, the influence of the low-temperature environment on the sealing gasket in the valve is not considered, the sealing gasket at the sealing part can shrink to a certain extent in the conventional low-temperature environment or in the sudden low-temperature state, and if the tightness of the valve is influenced by the shrinkage gap, the sealing gasket cannot be reflected in the detection method and cannot be detected; the second method lacks a reasonable and automatic detection device which can save time and labor to realize the test purpose, so that the current detection efficiency is low, and therefore, the high-precision valve sealing detection device and the detection method are provided.
Disclosure of Invention
The invention mainly aims to provide a high-precision valve sealing detection device and a detection method, which can effectively solve the problems that the low-temperature environment and the detection efficiency are not considered in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a high-precision valve seal detection device, includes the device main part, terminal surface department is provided with the refrigerator before the bottom of device main part, the refrigerator comprises compressor, condenser, capillary and evaporimeter, carries out continuous refrigeration to the inner chamber of device main part, the inside of device main part is vertical to be provided with the rodless cylinder, the lower extreme of rodless cylinder is fixed through the bottom surface of base and device main part, the activity is provided with the cylinder and removes the seat on the preceding terminal surface of rodless cylinder, the cylinder removes the fixed valve mount pad that is provided with of seat up end, the valve mount pad is used for installing the valve of waiting to detect.
Preferably, the valve mount pad includes and props seat, side splint, gasbag accomodate groove, bent type gasbag, U type shunt tubes and diplopore shunting, prop the upper end symmetry of seat and install two sets of side splint, the inboard of side splint is the slope form to set up the gasbag and accomodate the groove, be provided with bent type gasbag in the gasbag accomodate groove, the back of bent type gasbag and gasbag accomodate the groove and glue, two sets of bent type gasbag is inflated the back and is carried out the centre gripping to the valve from both sides, makes it fixed not rock, the through-hole has been seted up to the bottom of gasbag accomodate the groove and has been supplied the tube head of U type shunt tubes upwards to pass from the bottom, the junction of tube head and bent type gasbag of U type shunt tubes is provided with first sealing washer, the middle part of U type shunt tubes is provided with diplopore shunting for evenly distributed distribution flowing gas, U type shunt tubes and diplopore shunting all are located prop the seat inside.
Preferably, the inlet of the double-hole split-flow joint is connected with a gas flow pipe, a sealing port is formed in the middle position of the upper end face of the device main body, an elastic door is installed on one side of the sealing port, a torsion spring is installed on a bottom hinge shaft of the elastic door, the elastic door is driven to return to the sealing port automatically, and the highest point of the rising valve mounting seat does not leave the position of the sealing port, so that sealing loss is avoided.
Preferably, the outside of rodless cylinder is provided with the mobile mechanism who acts on the valve, mobile mechanism includes side support, lead screw, bearing frame, reverse spiral line, screw nut cover, gag lever post, bar groove, lead screw removal seat and drive gear, the side support symmetry sets up in mobile mechanism's outermost side, two sets of the level is provided with the lead screw between the side support, the both ends of lead screw are fixed through the top of bearing frame and side support, the symmetry is provided with reverse spiral line on the lead screw, two sets of the lead screw removes the seat and is located reverse spiral line position department respectively symmetry, the inside fixed mounting of lead screw removes the seat has the screw nut cover, be provided with the screw nut that acts on reverse spiral line in the screw nut cover, the both ends of gag lever post weld respectively on side support, base, the gag lever post is total two sets of all to pass the bar groove that the lead screw removed seat department, plays the limiting effect.
Preferably, the middle part of lead screw has cup jointed driving gear, be provided with the driving motor group on the base, the driving motor group includes motor, motor housing, reduction gear, acts on driving gear, drives the lead screw and rotates at the uniform velocity, two sets of the equal level fixed mounting of upper end intermediate position department of lead screw movable seat has the connecting pipe.
Preferably, one end of the connecting pipe on the right side is provided with a first telescopic bellows, the first telescopic bellows is located in a first pipe sleeve, two groups of first fixing plates are fixedly arranged on the first pipe sleeve and extend upwards to be fixed with the inner wall of the device main body, the first telescopic bellows is horizontally connected with an air outlet pipe of an air supply device, the air supply device is located at the right end of the device main body and extends inwards, an air suction pipe of the air supply device is located in the device main body and is close to the position of a refrigerator and used for sucking low-temperature air, and the air supply device further comprises a breathing pipe which horizontally penetrates through the two groups of first fixing plates and the air flow pipe to be communicated.
Preferably, the left side connecting pipe one end is provided with the second bellows, the second bellows is located the second pipe box, the second pipe box is last to be fixedly provided with two sets of second fixed plates to upwards extend and the inner wall of device main part is fixed, second bellows horizontal connection L type bubble pipe, L type bubble pipe stretches out outside the device main part, the fixed transparent water tank that is provided with in left end of device main part, L type bubble pipe downwardly extending gets into in the transparent water tank, produces the bubble phenomenon in transparent water tank.
Preferably, the other ends of the left and right groups of connecting pipes are respectively provided with a sealer, and the two groups of sealers are respectively attached to the inlet flange and the outlet flange of the valve to play a role in sealing connection.
Preferably, the sealer comprises a welding flange, a second sealing ring, a rubber gasket clamping groove, an inner heat insulation layer, inner perforations, a sealing rubber gasket, outer perforations and an oil bag pipe, wherein the welding flange is welded at the pipe orifice of the connecting pipe, the second sealing ring is sleeved at the joint of the welding flange and the sealing rubber gasket, the sealing rubber gasket is embedded in the rubber gasket clamping groove of the welding flange, the inner heat insulation layer is arranged on the inner periphery of the rubber gasket clamping groove, the sealing rubber gasket is made of heat insulation materials, a plurality of groups of inner perforations are uniformly arranged on the inner heat insulation layer, the preferential number of the inner perforations is 4, the outer perforations are formed in the corresponding positions on the sealing rubber gasket, the inner perforations and the outer perforations are internally plugged into the oil bag pipe, one side face of the oil bag pipe and the inner wall of the outer perforations are glued, sealing oil is filled in the oil bag pipe, the sealing oil is contracted when the sealing oil is cooled, and gaps are leaked at the positions of the inner perforations and the outer perforations are used for discharging gas.
A high-precision valve seal detection method comprises the following detection steps:
s1, starting a rodless cylinder to drive a cylinder moving seat to move to the highest point, namely upwards stretching an elastic door, then placing a valve into the valve mounting seat, arranging the valve between two groups of side clamping plates, and ensuring that the center of a valve base is positioned on a prefabricated center station of the valve mounting seat;
s2, simultaneously starting a refrigerator and an air supply device, wherein the air supply device sucks cold air in the device main body by utilizing an air suction pipe, then opens a first control valve on the breathing pipe, enables the cold air to enter into an air flow pipe along the breathing pipe, conveys the cold air into a U-shaped shunt pipe, respectively injects the cold air into two groups of curved air bags to expand the cold air into the curved air bags, expands the cold air inwards, is attached to the irregular surface of the valve in opposite directions, and then closes the first control valve;
s3, enabling the cylinder moving seat to carry the valve to descend into the device main body, enabling the flange position of the valve and the left and right connecting pipes to be at the same height, facilitating butt joint, restarting the motor, enabling a speed reducer at one side of the motor to be meshed with a driving gear to drive the driving gear to move, enabling screw rods to rotate at a constant speed, enabling screw rod moving seats on two groups of screw rods to move in opposite directions until the screw rod moving seats are respectively contacted with the left and right connecting pipes by using a sealer, and enabling the screw rods to be attached and sealed to form a communicating state of a pipeline;
s4, starting the air supply device, sucking cold air in the device main body by using the air suction pipe, opening a second control valve on the air outlet pipe, injecting the cold air, and sequentially passing through the first telescopic corrugated pipe, the right connecting pipe and the valve to be in low-temperature environment, and continuously contacting the conveyed cold air;
s5, when an air leakage gap exists in the valve or the sealing gasket is contracted, the air leakage gap is formed, cold air continuously enters the left connecting pipe through the valve, passes through the second telescopic corrugated pipe and the L-shaped bubble pipe, and passes through the transparent water storage tank, so that a bubble phenomenon is generated.
The invention provides a high-precision valve seal detection device and a detection method through improvement, and compared with the prior art, the device has the following remarkable improvements and advantages:
when the sealing test is carried out, the influence of low temperature on the valve is considered, the refrigerator is added, a low-temperature environment is firstly built around the valve, then cold air is collected and supplied through the air supply device, and the cold air is directly and continuously conveyed to the sealing gasket of the valve plate, so that whether the sealing gasket is contracted or not can generate an air leakage phenomenon is checked, the detection effect of the valve is ensured, and the detection means are enriched.
The first control valve on the breathing tube is opened, so that cold air in the air supply device enters the air flow tube along the breathing tube and then is conveyed into the U-shaped shunt tube, and the U-shaped shunt tube is respectively injected into the two groups of curved air bags to expand the U-shaped shunt tube and expand the U-shaped shunt tube inwards, and the U-shaped shunt tube is attached to the irregular surface of the valve in opposite directions to achieve the clamping effect, thereby solving the technical problems that the valve is easy to shake and displace and the surface of the valve is irregular and cannot be effectively clamped and fixed, and enabling the air supply device to have the functions in two aspects.
The sealing device is designed, a plurality of groups of inner perforations are uniformly arranged on the inner heat insulation layer, cold air enters the inner perforations, sealing oil of the oil bag pipe is enabled to be subjected to cold shrinkage, the oil bag pipe is slightly deformed integrally, and gas discharge positions of gaps are leaked from the positions of the inner perforations and the outer perforations in a non-glued area, so that the smoothness of gas in the pipe is ensured, and the working sustainability is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a high-precision valve seal detection device and a detection method according to the present invention;
FIG. 2 is a specific block diagram of the rodless cylinder of the present invention;
FIG. 3 is an enlarged view of the seal of the present invention;
FIG. 4 is a disassembled view of the valve mounting base of the present invention;
FIG. 5 is a specific block diagram of the moving mechanism of the present invention;
FIG. 6 is a schematic diagram of the connection of the right side connection pipe of the present invention;
FIG. 7 is a schematic diagram of the connection of the left side connection tube of the present invention;
fig. 8 is a schematic view showing the sealer of the present invention disassembled.
In the figure: 1. a device body; 2. a refrigerator; 3. a rodless cylinder; 4. a base; 5. a cylinder moving seat; 6. a valve mounting seat; 7. a support seat; 8. a side clamping plate; 9. a valve; 10. an air bag accommodating groove; 11. a curved air bag; 12. a U-shaped shunt tube; 13. a through hole; 14. a first seal ring; 15. a double-hole shunt joint; 16. a gas flow pipe; 17. sealing the mouth; 18. an elastic door; 19. a moving mechanism; 20. driving the motor unit; 21. a side support; 22. a screw rod; 23. a bearing seat; 24. reverse spiral lines; 25. a screw-nut sleeve; 26. a limit rod; 27. a rod groove; 28. a screw rod moving seat; 29. a drive gear; 30. a connecting pipe; 31. a first bellows; 32. a first tube sleeve; 33. a first fixing plate; 34. an air outlet pipe; 35. a gas supply device; 36. an air suction pipe; 37. the second telescopic corrugated pipe; 38. a second sleeve; 39. a second fixing plate; 40. an L-shaped bubble tube; 41. a transparent water storage tank; 42. a sealer; 43. welding a flange; 44. a second seal ring; 45. a rubber pad clamping groove; 46. an inner thermal insulation layer; 47. an inner perforation; 48. sealing a rubber pad; 49. an outer perforation; 50. an oil bag tube; 51. a respiratory tube.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1-7, this embodiment provides a high-precision valve seal detection device, including a device main body 1, a refrigerator 2 is provided at the front end face of the bottom of the device main body 1, the refrigerator 2 is composed of a compressor, a condenser, a capillary tube and an evaporator, the air in the device main body 1 is directly cooled by utilizing the evaporation of the refrigerant, the inner cavity of the device main body 1 is continuously cooled, a rodless cylinder 3 is vertically provided in the device main body 1, the lower end of the rodless cylinder 3 is fixed through a base 4 and the bottom surface of the device main body 1, a cylinder moving seat 5 is movably provided on the front end face of the rodless cylinder 3, a valve mounting seat 6 is fixedly provided on the upper end face of the cylinder moving seat 5, and the valve mounting seat 6 is used for mounting a valve 9 to be detected.
Specifically, the valve mounting seat 6 includes a stay seat 7, a side clamping plate 8, an air bag accommodating groove 10, a curved air bag 11, a U-shaped shunt tube 12 and a double-hole shunt joint 15, as shown in fig. 4.
In this embodiment, two sets of side clamping plates 8 are symmetrically installed at the upper end of the supporting seat 7, the inner sides of the side clamping plates 8 are inclined, so that the side clamping plates can be conveniently matched with the curved air bag 11 to clamp inwards, and an air bag accommodating groove 10 is formed.
In this embodiment, a curved air bag 11 is disposed in the air bag accommodating groove 10, the back surface of the curved air bag 11 and the air bag accommodating groove 10 are glued, and after two sets of curved air bags 11 are inflated, the valves 9 are clamped from two sides so as to fix the curved air bags without shaking.
In this embodiment, the bottom of the air bag accommodating groove 10 is provided with a through hole 13 for the tube head of the U-shaped shunt tube 12 to pass through from bottom to top, the joint of the tube head of the U-shaped shunt tube 12 and the curved air bag 11 is provided with a first sealing ring 14 for sealing protection, the middle part of the U-shaped shunt tube 12 is provided with a double-hole shunt joint 15 for uniformly distributing and distributing flowing air, and simultaneously, the two groups of curved air bags 11 are inflated, and the U-shaped shunt tube 12 and the double-hole shunt joint 15 are both positioned inside the supporting seat 7.
Further, the inlet of the double-hole split-flow joint 15 is connected with a gas flow pipe 16.
Further, a sealing port 17 is formed in the middle of the upper end surface of the device main body 1, an elastic door 18 is mounted on one side of the sealing port 17, as shown in fig. 3, a torsion spring is mounted on a bottom hinge shaft of the elastic door 18, the elastic door 18 is driven to return to the sealing port 17 automatically, and the highest rising point of the valve mounting seat 6 does not leave the sealing port 17, so that the leakage of cold air inside is avoided.
In this embodiment, the outside of the rodless cylinder 3 is provided with a moving mechanism 19 that acts on the valve 9.
Specifically, the moving mechanism 19 includes a side support 21, a screw 22, a bearing housing 23, a reverse spiral 24, a screw nut sleeve 25, a stopper rod 26, a rod groove 27, a screw moving seat 28, and a drive gear 29, as shown in fig. 5.
In this embodiment, the side supports 21 are symmetrically disposed at the outermost side of the moving mechanism 19, and a screw 22 is horizontally disposed between two sets of side supports 21.
In this embodiment, two ends of the screw 22 are fixed to the top of the side support 21 through bearing blocks 23, reverse spiral threads 24 are symmetrically arranged on the screw 22, and two sets of screw moving seats 28 are symmetrically located at the positions of the reverse spiral threads 24 respectively.
In this embodiment, a screw nut sleeve 25 is fixedly installed inside the screw moving seat 28, and a screw nut acting on the reverse spiral thread 24 is provided in the screw nut sleeve 25.
In this embodiment, two ends of the limiting rod 26 are welded on the side support 21 and the base 4 respectively, and the limiting rod 26 passes through the rod grooves 27 at the screw rod moving seat 28 in two groups, so as to play a limiting role.
Further, a driving gear 29 is sleeved at the middle part of the screw rod 22, a driving motor group 20 is arranged on the base 4, the driving motor group 20 comprises a motor, a motor shell and a speed reducer, the driving motor group 20 acts on the driving gear 29 to drive the screw rod 22 to rotate at a uniform speed, and a connecting pipe 30 is horizontally and fixedly arranged at the middle position of the upper end parts of the two groups of screw rod moving seats 28.
In this embodiment, as shown in fig. 6, one end of the right connecting pipe 30 is provided with a first bellows 31, which has stretchability, and can stretch and retract as the connecting pipe 30 moves, the first bellows 31 is located in a first pipe sleeve 32, the right end is fixed in the first pipe sleeve 32, and two sets of first fixing plates 33 are fixedly provided on the first pipe sleeve 32 and extend upward to be fixed to the inner wall of the device body 1.
In this embodiment, the first bellows 31 is horizontally connected to the air outlet pipe 34 of the air supply device 35, and the air supply device 35 is located at the right end of the device body 1 and extends inward.
Further, the air supply device 35 includes an air pump and a gas temporary storage tank, the air pump acts on the air suction pipe 36 to store the sucked air into the gas temporary storage tank for release.
In the present embodiment, the air intake pipe 36 of the air supply device 35 is located inside the device body 1 near the refrigerator 2 for taking in low-temperature air.
Further, the air supply device 35 further comprises a breathing tube 51, the breathing tube 51 horizontally penetrates through the two groups of first fixing plates 33 and is communicated with the air flow pipe 16, the other group of air pump pipes are connected to the air flow pipe 16, and after the test, the bent air bags 11 in the full state are directly pumped out, so that the air discharge problem is solved.
In this embodiment, as shown in fig. 7, one end of the left connecting pipe 30 is provided with a second bellows 37, which has flexibility, and can expand and contract along with the movement of the connecting pipe 30, the second bellows 37 is located in a second pipe sleeve 38, the left end is fixed in the second pipe sleeve 38, and two sets of second fixing plates 39 are fixedly provided on the second pipe sleeve 38, and extend upward and are fixed to the inner wall of the device body 1.
Further, the second bellows 37 is horizontally connected to an L-shaped bubble tube 40, and the L-shaped bubble tube 40 extends out of the apparatus body 1.
Further, a transparent water storage tank 41 is fixedly provided at the left end of the apparatus main body 1, and an l-shaped bubble tube 40 extends downward into the transparent water storage tank 41, thereby generating a bubble phenomenon in the transparent water storage tank 41.
Further, the other ends of the left and right groups of connecting pipes 30 are respectively provided with a sealer 42, and the two groups of sealers 42 are respectively attached to the inlet flange and the outlet flange of the valve 9 to play a role in sealing connection.
When the embodiment is used, firstly, the rodless cylinder 3 is started to drive the cylinder moving seat 5 to move to the highest point, namely, the elastic door 18 is upwards spread to expose the upper end face of the valve mounting seat 6 for mounting the valve 9, then the valve 9 is placed in the valve mounting seat 6 and positioned between two groups of side clamping plates 8, the center of the valve 9 base is ensured to be positioned on a prefabricated central station of the valve mounting seat 6, then the refrigerator 2 and the air supply device 35 are simultaneously started, the air supply device 35 utilizes the air suction pipe 36 to suck cold air (an air suction pump is used as a power source) in the device main body 1, then the first control valve on the breathing pipe 51 is opened to enable the cold air to enter the air flow pipe 16 along the breathing pipe 51 and then to be conveyed into the U-shaped shunt pipe 12, and the cold air is respectively injected into the two groups of curved air bags 11 to expand and inwards expand, and is oppositely attached to the irregular surface of the valve 9, after the clamping effect is achieved, the first control valve is closed, then the cylinder moving seat 5 carries the valve 9 to descend into the device main body 1 (at the moment, the elastic door 18 is reset to be closed under the action of the torsion spring and keeps sealing), the flange position of the valve 9 and the left and right connecting pipes 30 keep the same height (the aim is achieved by installing a controller and a position sensor on the rodless cylinder 3), the butt joint is convenient, the motor is started again, a speed reducer on one side of the motor is meshed with the driving gear 29 to drive the driving gear 29 to move, so that the screw rods 22 rotate at a constant speed, screw rod moving seats 28 on the two groups of screw rods 22 move in opposite directions until the sealing device 42 and the left and right connecting pipes 30 are respectively contacted and sealed in a fitting way, a communicating state of a pipeline is formed, at the moment, the air supply device 35 is started, cold air in the device main body 1 is sucked by the suction pipe 36, and then the second control valve on the air outlet pipe 34 is opened to inject cold air, and then the cold air sequentially passes through the first telescopic bellows 31, the right connecting pipe 30 and the valve 9, and as the valve 9 is in a low-temperature environment and continuously contacts the delivered cold air, cold shrinkage phenomenon occurs at a plurality of sealing gasket positions in the valve 9, when an air leakage gap exists in the valve or the sealing gasket is contracted, the cold air continuously enters the left connecting pipe 30 through the valve 9, passes through the second telescopic bellows 37 and the L-shaped air bubble pipe 40 and passes through the transparent water storage tank 41 to generate air bubble phenomenon, so that the test effect is achieved (if a specific air leakage reason is needed to be determined, namely, the air leakage gap exists in the valve or the air leakage gap is generated after the sealing gasket is contracted, the refrigerator 2 is opened or closed for testing).
Example 2
On the basis of the first embodiment, the structure of the sealer 42 is designed so as to solve the technical problems that the breather valve needs to be separately installed and the inner side of the rubber pad in the sealer 42 is contracted by low temperature, as shown in fig. 8.
Specifically, the sealer 42 includes a welding flange 43, a second seal ring 44, a rubber gasket clamping groove 45, an inner heat insulating layer 46, an inner through hole 47, a sealing rubber gasket 48, an outer through hole 49, and an oil bag pipe 50.
In this embodiment, the welding flange 43 is welded at the pipe orifice of the connecting pipe 30, and the joint of the two is sleeved with the second sealing ring 44, which plays a role in sealing protection.
In this embodiment, the sealing rubber gasket 48 is embedded in the rubber gasket clamping groove 45 of the welding flange 43, an inner heat insulation layer 46 is arranged on the inner side of the rubber gasket clamping groove 45, and the sealing rubber gasket is made of heat insulation material, so that one side of the inner side of the sealing rubber gasket 48 is not subjected to low temperature, and an effective sealing effect is achieved.
In this embodiment, a plurality of groups of inner perforations 47 are uniformly arranged on the inner heat insulation layer 46, outer perforations 49 are arranged at corresponding positions on the sealing rubber pad 48, and the inner perforations 47 and the outer perforations 49 are internally plugged into the oil bag tube 50.
Specifically, one side surface of the oil bag tube 50 and the inner wall of the outer perforation 49 are bonded, sealing oil is filled in the oil bag tube 50, the volume is contracted when the oil bag tube is cooled, and gaps are leaked at the inner perforation 47 and the outer perforation 49 for discharging gas.
Further, the oil bag tube 50 is brought into contact with the inner and outer perforations 47 and 49 sufficiently by the pressure of the filled sealing oil at normal temperature to achieve a sealed state.
Further, the installation of the oil bag pipe 50 serves to connect the inner through hole 47 and the outer through hole 49, and fix the sealing rubber pad 48.
When the sealing device is used, the sealing rubber pad 48 is used for being in contact with the flange surface of the connecting pipe 30, the sealing effect is achieved through extrusion and lamination, the smoothness of gas in the pipe is guaranteed, and the air supply device 35 needs to balance the internal and external pressure difference and release redundant gas under the condition of continuously supplying air to the air outlet pipe 34, so that the air supply continuity is guaranteed, the inner heat insulation layer 46 is uniformly provided with the plurality of groups of inner perforations 47, cold air enters the inner perforations 47, sealing oil of the oil bag pipe 50 is subjected to cold shrinkage, the whole oil bag pipe 50 is slightly deformed, and the gas in the pipe is guaranteed to be smooth in the non-glued area, namely, the gas discharge position of a gap is leaked at the positions of the inner perforations 47 and the outer perforations 49.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides a high-precision valve seal detection device, includes device main part (1), its characterized in that: the device comprises a device body (1), wherein a refrigerator (2) is arranged at the front end face of the bottom of the device body (1), the refrigerator (2) consists of a compressor, a condenser, a capillary tube and an evaporator, a rodless cylinder (3) is vertically arranged in the device body (1), the lower end of the rodless cylinder (3) is fixed through a base (4) and the bottom face of the device body (1), a cylinder moving seat (5) is movably arranged on the front end face of the rodless cylinder (3), a valve mounting seat (6) is fixedly arranged on the upper end face of the cylinder moving seat (5), and the valve mounting seat (6) is used for mounting a valve (9) to be detected;
the valve mounting seat (6) comprises a supporting seat (7), side clamping plates (8), an air bag accommodating groove (10), curved air bags (11), U-shaped shunt pipes (12) and double-hole shunt joints (15), wherein two groups of side clamping plates (8) are symmetrically arranged at the upper end of the supporting seat (7), the inner sides of the side clamping plates (8) are inclined, the air bag accommodating groove (10) is formed, the curved air bags (11) are arranged in the air bag accommodating groove (10), the back surfaces of the curved air bags (11) are glued with the air bag accommodating groove (10), the two groups of curved air bags (11) are used for clamping the valve (9) from two sides after being inflated, through holes (13) are formed in the bottom of the air bag accommodating groove (10) for allowing the pipe heads of the U-shaped shunt pipes (12) to penetrate from bottom to top, first sealing rings (14) are arranged at the connecting positions of the pipe heads of the U-shaped shunt pipes (12) and the curved air bags (11), double-hole shunt joints (15) are arranged in the middle parts of the U-shaped shunt pipes (12), and the double-hole shunt pipes (12) are positioned in the supporting seat (7);
the inlet of the double-hole split-flow joint (15) is connected with a gas flow pipe (16), a sealing port (17) is formed in the middle position of the upper end face of the device main body (1), an elastic door (18) is installed on one side of the sealing port (17), a torsion spring is installed on a bottom hinge shaft of the elastic door (18), the elastic door (18) is driven to automatically return to the sealing port (17), and the highest rising point of the valve mounting seat (6) does not leave the position of the sealing port (17);
the automatic control device is characterized in that a moving mechanism (19) acting on a valve (9) is arranged on the outer side of the rodless cylinder (3), the moving mechanism (19) comprises a side support (21), a screw rod (22), a bearing seat (23), a reverse spiral thread (24), a screw rod nut sleeve (25), a limiting rod (26), a rod groove (27), a screw rod moving seat (28) and a driving gear (29), the side support (21) is symmetrically arranged on the outermost side of the moving mechanism (19), screw rods (22) are horizontally arranged between two groups of the side supports (21), two ends of the screw rod (22) are fixed through the bearing seat (23) and the top of the side support (21), reverse spiral threads (24) are symmetrically arranged on the screw rod (22), two groups of screw rod moving seats (28) are symmetrically arranged at the positions of the reverse spiral threads (24) respectively, the screw rod nut sleeve (25) is fixedly arranged in the screw rod moving seat (28), screw rod nuts acting on the reverse spiral threads (24) are arranged in the screw rod nut sleeve (25), and two ends of the limiting rod (26) are respectively welded on the side support (21) and the two groups of the screw rod moving seats (28) and pass through the screw rod seat (27) respectively;
the middle part of the screw rod (22) is sleeved with a driving gear (29), the base (4) is provided with a driving motor group (20), the driving motor group (20) comprises a motor, a motor shell and a speed reducer, the driving motor group acts on the driving gear (29) to drive the screw rod (22) to rotate at a uniform speed, and connecting pipes (30) are horizontally and fixedly arranged at the middle positions of the upper end parts of the two groups of screw rod moving seats (28);
one end of the connecting pipe (30) on the right side is provided with a first telescopic corrugated pipe (31), the first telescopic corrugated pipe (31) is positioned in a first pipe sleeve (32), two groups of first fixing plates (33) are fixedly arranged on the first pipe sleeve (32) and extend upwards to be fixed with the inner wall of the device main body (1), the first telescopic corrugated pipe (31) is horizontally connected with an air outlet pipe (34) of an air supply device (35), the air supply device (35) is positioned at the right end of the device main body (1) and extends inwards, an air suction pipe (36) of the air supply device (35) is positioned in the device main body (1) and approaches to the refrigerator (2), the air supply device (35) further comprises a breathing pipe (51), and the breathing pipe (51) horizontally penetrates through the two groups of first fixing plates (33) and is communicated with the air flow pipe (16);
the left end of the connecting pipe (30) is provided with a second telescopic corrugated pipe (37), the second telescopic corrugated pipe (37) is positioned in a second pipe sleeve (38), two groups of second fixing plates (39) are fixedly arranged on the second pipe sleeve (38) and extend upwards to be fixed with the inner wall of the device main body (1), the second telescopic corrugated pipe (37) is horizontally connected with an L-shaped bubble pipe (40), the L-shaped bubble pipe (40) extends out of the device main body (1), the left end of the device main body (1) is fixedly provided with a transparent water storage tank (41), and the L-shaped bubble pipe (40) extends downwards into the transparent water storage tank (41);
the other ends of the left and right groups of connecting pipes (30) are provided with sealers (42), and the two groups of sealers (42) are respectively attached to inlet and outlet flanges of the valve (9) to play a role in sealing connection;
the sealing device comprises a sealing flange (43), a second sealing ring (44), a rubber gasket clamping groove (45), an inner heat insulation layer (46), an inner perforation (47), a sealing rubber gasket (48), an outer perforation (49) and an oil bag pipe (50), wherein the welding flange (43) is welded at the pipe orifice of the connecting pipe (30), the second sealing ring (44) is sleeved at the joint of the sealing flange and the sealing rubber gasket (48), the sealing rubber gasket (48) is embedded in the rubber gasket clamping groove (45) of the welding flange (43), the inner side of the rubber gasket clamping groove (45) is provided with the inner heat insulation layer (46), a plurality of groups of inner perforations (47) are uniformly arranged on the inner heat insulation layer (46), the outer perforation (49) are arranged at corresponding positions on the sealing rubber gasket (48), the inner perforation (47) and the outer perforation (49) are internally plugged into the oil bag pipe (50), one side surface of the oil bag pipe (50) and the inner wall of the outer perforation (49) are connected in a sleeved mode, sealing oil is fully filled in the oil bag pipe (50), and the inner perforation (47) and the outer perforation (49) are in a certain gas leakage gap.
2. A high-precision valve seal detection method applied to the high-precision valve seal detection device as claimed in claim 1, comprising the following detection steps:
s1, starting a rodless cylinder (3) to drive a cylinder moving seat (5) to move to the highest point, namely upwards expanding an elastic door (18), then placing a valve (9) into the valve mounting seat (6), and arranging the valve (9) between two groups of side clamping plates (8) and ensuring that the center of a base of the valve (9) is positioned on a prefabricated center station of the valve mounting seat (6);
s2, simultaneously starting the refrigerator (2) and the air supply device (35), sucking cold air in the device main body (1) by the air supply device (35) through an air suction pipe (36), opening a first control valve on the breathing pipe (51), enabling the cold air to enter the air flow pipe (16) along the breathing pipe (51), conveying the cold air into the U-shaped shunt pipe (12), respectively injecting the cold air into the two groups of curved air bags (11), expanding the curved air bags inwards, oppositely attaching the curved air bags on the irregular surface of the valve (9), and closing the first control valve;
s3, enabling the cylinder moving seat (5) to carry the valve (9) to descend into the device main body (1), enabling the flange position of the valve (9) and the left and right connecting pipes (30) to be kept at the same height, facilitating butt joint, restarting a motor, enabling a speed reducer on one side of the motor to be meshed with a driving gear (29), driving the driving gear (29) to move, enabling the screw rods (22) to rotate at a constant speed, enabling screw rod moving seats (28) on two groups of screw rods (22) to move in opposite directions until the screw rod moving seats are respectively contacted with the left and right connecting pipes (30) by using a sealer (42), and enabling the screw rods to be bonded and sealed to form a communicating state of a pipeline;
s4, starting an air supply device (35), sucking cold air in the device main body (1) by using an air suction pipe (36), opening a second control valve on an air outlet pipe (34), injecting the cold air, sequentially passing through a first telescopic corrugated pipe (31), a right connecting pipe (30) and a valve (9), and continuously contacting the delivered cold air because the valve (9) is in a low-temperature environment;
s5, when an air leakage gap exists in the valve or the sealing gasket is contracted to generate the air leakage gap, cold air continuously enters the left connecting pipe (30) through the valve (9), passes through the second telescopic corrugated pipe (37) and the L-shaped bubble pipe (40) and passes through the transparent water storage tank (41), and a bubble phenomenon is generated.
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| CN202211491124.5A CN115524070B (en) | 2022-11-25 | 2022-11-25 | High-precision valve seal detection device and detection method |
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| CN116625668A (en) * | 2023-05-26 | 2023-08-22 | 温州合力自动化仪表有限公司 | Adjustable valve actuator and testing method thereof |
| CN116429337B (en) * | 2023-06-09 | 2023-09-01 | 崇州市岷江塑胶有限公司 | Pipeline sealing detection mechanism and detection method thereof |
| CN116907749B (en) * | 2023-09-14 | 2023-11-17 | 济南凯特自动化系统有限公司 | Control valve packing bellows tightness detection device |
| CN117686159B (en) * | 2024-02-01 | 2024-04-12 | 武汉光谷蓝焰新能源股份有限公司 | Sealing detection method for boiler |
| CN117949150B (en) * | 2024-03-26 | 2024-06-04 | 中铁城建集团第一工程有限公司 | Detection device for precast slab sealant |
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| CN102928166A (en) * | 2012-07-23 | 2013-02-13 | 荆门市恒生源电子科技有限公司 | Leakage detection device for lithium batteries |
| CN105258863A (en) * | 2015-11-11 | 2016-01-20 | 长春轨道客车股份有限公司 | Simulation detection apparatus of railway-vehicle 3-way ball valve cold resistance performance |
| CN105675221B (en) * | 2016-01-07 | 2018-04-27 | 北京航天发射技术研究所 | It is a kind of to measure system and method for the sealing material low temperature seal than pressing performance parameter |
| CN107436211B (en) * | 2017-07-28 | 2019-11-19 | 湖北三江航天红峰控制有限公司 | A kind of air-tightness detection device and detection method suitable for straight-through stop valve |
| CN208902352U (en) * | 2018-09-30 | 2019-05-24 | 杭州意盛通力金属制品有限公司 | One kind is soft to be connected to dynamic pressure measuring unit |
| CN109596274A (en) * | 2018-12-10 | 2019-04-09 | 美钻深海能源科技研发（上海）有限公司 | A kind of valve base sealing experimental rig test method |
| CN209296243U (en) * | 2019-01-14 | 2019-08-23 | 阿湾拓流体控制技术(北京)有限公司 | A kind of air-tightness detection device of industrial valve |
| CN112326143A (en) * | 2020-11-23 | 2021-02-05 | 温州富技阀门有限公司 | Energy-efficient safe type test device suitable for ultra-low temperature operating mode |
| CN112284630A (en) * | 2020-11-30 | 2021-01-29 | 衡阳市稼乐农机科技有限公司 | Pipe part sealing performance detection device for tractor production |
| CN112816159B (en) * | 2021-01-07 | 2023-02-21 | 安徽新美格包装发展有限公司 | Food can gas tightness check out test set |
| CN216559591U (en) * | 2021-12-23 | 2022-05-17 | 上海绿策实业有限公司 | Be used for fire hose valve detection device |
| CN217211313U (en) * | 2022-01-25 | 2022-08-16 | 湖北玲珑轮胎有限公司 | Air leakage detection device for automobile tire production |
| CN115290261B (en) * | 2022-09-26 | 2023-01-10 | 常州华数锦明智能装备技术研究院有限公司 | Floating type air tightness testing device |
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