CN105841897B - A kind of performing leak test machine - Google Patents
A kind of performing leak test machine Download PDFInfo
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- CN105841897B CN105841897B CN201610183371.7A CN201610183371A CN105841897B CN 105841897 B CN105841897 B CN 105841897B CN 201610183371 A CN201610183371 A CN 201610183371A CN 105841897 B CN105841897 B CN 105841897B
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- central siphon
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- steel pipe
- pipe inner
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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
- G01M3/2807—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 pipes
- G01M3/2815—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 pipes using pressure measurements
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- General Physics & Mathematics (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a kind of performing leak test machines, including mainframe, air feed pump, block cylinder, compression cylinder, central siphon, limit base, connection supports frame, clamping piston bar is equipped with positioning plate, end socket piston rod is equipped with band moving frame, central siphon is equipped with modeling and manages outer end-plate, the outer end-plate of steel pipe, mould pipe exterior seal ring, steel pipe exterior seal ring, central siphon is equipped with the first air inlet, first air inlet is equipped with the first breather check valve, central siphon outer wall is equipped with the first baroceptor, the steel modeling crossover sub that connection supports frame is supported is in limit base and blocks between cylinder, the gas supply end of air feed pump inside air supply pipe and central siphon by being connected to.The beneficial effects of the present invention are: reasonable integral structure, in place to the positioning and clamping of steel modeling crossover sub, it can ensure leakproofness but damage steel modeling crossover sub will not be pressed from both sides；With can automatic adjusument sealing structure, can strengthen hyperbar detection when sealing effect.
Description
Technical field
The invention belongs to the close property the field of test technology of pipe fitting joint more particularly to a kind of performing leak test machines.
Background technique
Steel moulds crossover sub, and also known as PE steel moulds crossover sub, is widely used to current production, among life, such as
Largely crossover sub will be moulded using steel in combustion gas, natural gas transportation pipeline, and (outer combustion gas pipeline is mostly PE pipeline, into room
Inside it is generally steel pipe, needs to mould crossover sub using steel in switching process).Steel moulds crossover sub, itself includes (one section of lengths of steel pipes
Steel pipe) and modeling pipeline section (usually one section of PE is managed), one end of lengths of steel pipes docks to form linkage section with the one end for moulding pipeline section, linkage section
It is mostly clamped and is formed by lengths of steel pipes one end and modeling pipeline section one end, and be sealed that (linkage section would generally be arranged one using sealing ring
A little concaveconvex structures cooperate clamping, if the flange in lengths of steel pipes mutually fastens with the card slot on modeling pipeline section, can also set outside linkage section
Anchor ear is set further to be held tightly), the front of motor of lengths of steel pipes is known as steel pipe end, and the front of motor for moulding pipeline section is known as moulding pipe end,
Modeling pipe end can be with wait dock modeling pipe (PE pipe) welding, and steel pipe end can connect with steel tube screw thread to be docked, weld or pass through it
Its structure is docked.Since steel modeling crossover sub is applied to gas, liquid transportation art, so its leakproofness needs
To guarantee, before factory, its being sealed property is detected.
When the prior art detects steel modeling crossover sub, generallys use gasket or sealing ring is placed in steel modeling conversion and connects
The outside at head both ends (steel pipe end and modeling pipe end), while steel modeling crossover sub is clamped in force application apparatus such as jack or hydraulic cylinders
Both ends turn the steel modeling after entire sealing so that gasket or sealing ring and two ends of steel modeling crossover sub be made to be formed and be sealed
Changing-over head is immersed in the water, then toward being passed through compressed gas and examine its sealing performance inside steel modeling crossover sub.
Above-mentioned test method has the disadvantages that 1, operating process complexity, and rack heavier-weight need to be by external equipment
Rack is immersed in the water, and the installation of steel modeling crossover sub is also more troublesome；2, pressing plate is pushed to steel using jack
Modeling crossover sub is sealed and sealing ring is placed in outside steel modeling crossover sub both ends, and is clamped in hydraulic cylinder (or cylinder)
When steel modeling crossover sub both ends are sealed, all more difficult control of the dynamics of the two may if the power for pushing or clamping is inadequate
The sealing of steel modeling crossover sub end can be made not firm, to influence the accuracy of test, bring the erroneous judgement in quality, push or
If the power of clamping is excessive, steel modeling crossover sub can be made to deform, steel is caused to mould crossover sub end face (pipe end) out-of-flatness, from
And make that sealing can not be formed between steel modeling crossover sub and pressing plate, the erroneous judgement in quality is brought, in addition, the power for pushing or clamping
Excessively, it is also possible to which directly damage steel moulds crossover sub.
Summary of the invention
It is easy to operate it is an object of the invention to overcome the defect of prior art, and provide a kind of reasonable integral structure, test
As a result accuracy is high, and can guarantee that two pipe ends of steel modeling crossover sub are not easy to be pressed from both sides the performing leak test machine of damage.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of performing leak test machine, including mainframe, air feed pump further include blocking cylinder, compression cylinder, two end seals
It closes and horizontal central siphon, the limit base for contacting steel modeling crossover sub one end, is used to support steel modeling crossover sub and moulds steel
Crossover sub axis is in the connection supports frame of horizontality, blocks cylinder, compression cylinder, connection supports frame and is arranged at host
On frame, the closure cylinder includes end socket cylinder body, end socket the cylinder piston, end socket piston rod, the scalable direction water of end socket piston rod
Flat, compression cylinder includes compressing cylinder body, compressing the cylinder piston, clamping piston bar, and the scalable direction of clamping piston bar is vertical, compresses
Piston rod is equipped with the positioning plate for compressing steel modeling crossover sub, and positioning plate is in above connection supports frame, end socket piston rod
It is equipped with the band moving frame for driving central siphon axially to move horizontally along central siphon, central siphon is equipped with cricoid modeling and manages outer end-plate, ring
The outer end-plate of the steel pipe of shape, modeling manage outer end-plate outer peripheral surface and are equipped with modeling pipe outside plate annular groove, set on the outer end-plate outer peripheral surface of steel pipe
There is steel pipe outside plate annular groove, it is same with central siphon that the outer end-plate of outer end-plate, steel pipe, modeling pipe outside plate annular groove, steel pipe outside plate annular groove are managed in modeling
Axis, modeling pipe outside plate annular groove are equipped with the modeling pipe exterior seal ring for contacting steel modeling crossover sub inner wall, set on steel pipe outside plate annular groove
There is the steel pipe exterior seal ring for contacting steel modeling crossover sub inner wall, central siphon is equipped with the first air inlet being connected to central siphon inside
Mouthful, the first air inlet be equipped with the first breather check valve, the first breather check valve can by direction be by central siphon to central siphon
Outside, central siphon outer wall is equipped with the first baroceptor, and the steel modeling crossover sub that connection supports frame is supported is in limit base and envelope
Between gas shutoff cylinder, by being connected to inside air supply pipe and central siphon, the central siphon outer wall is equipped with several be used at the gas supply end of air feed pump
Protrude into the filling block in steel modeling crossover sub.
Preferably, the connection supports frame include horizontal support baseboard, two it is vertical and supports parallel to each other are vertical
Plate, supporting vertical plate are equipped with the V-arrangement support slot for accommodating steel modeling crossover sub, opening up, the supporting vertical plate of V-arrangement support slot
Lower end is fixed with support baseboard top surface.
Preferably, the central siphon is equipped with cricoid modeling pipe inner end sealing plate, cricoid steel pipe inner end sealing plate, pipe inner end is moulded
Sealing plate outer peripheral surface is equipped with modeling pipe inner panel annular groove, and steel pipe inner end sealing plate outer peripheral surface is equipped with steel pipe inner panel annular groove, moulds pipe inner panel ring
Slot is equipped with the modeling pipe inner seal ring for contacting steel modeling crossover sub inner wall, and steel pipe inner panel annular groove is equipped with for contacting steel modeling
The steel pipe inner seal ring of crossover sub inner wall, modeling pipe inner end sealing plate, steel pipe inner end sealing plate, modeling pipe inner panel annular groove, steel pipe inner panel ring
Slot is coaxial with central siphon, and modeling pipe inner end sealing plate is in steel pipe inner end sealing plate and modeling is managed between outer end-plate, at the sealing plate of steel pipe inner end
It is moulding outside pipe inner end sealing plate and steel pipe between end-plate, central siphon is equipped with the second air inlet and central siphon being connected to central siphon inside
Inside connection third air inlet, central siphon outer wall be equipped with the second baroceptor, third baroceptor, the first air inlet with
First baroceptor is between the outer end-plate of steel pipe and steel pipe inner end sealing plate, the second air inlet and the second baroceptor
It is between steel pipe inner end sealing plate and modeling pipe inner end sealing plate, third air inlet and third baroceptor are in modeling pipe inner end
Sealing plate and modeling are managed between outer end-plate, and the second air inlet is equipped with the second breather check valve, third air inlet equipped with third into
Gas check valve, the second breather check valve can by direction, third breather check valve can be by direction by central siphon extremely
Outside central siphon.
Preferably, the steel pipe exterior seal ring, steel pipe inner seal ring, modeling pipe inner seal ring, modeling pipe exterior seal ring are
Inside has the gas-flow closure circle of inflatable chamber, and the outer end-plate of steel pipe is equipped with will be in steel pipe exterior seal ring inner inflatable chamber and central siphon
The steel pipe outer ring gas tube of portion's connection, steel pipe inner end sealing plate, which is equipped with, to be connected inside steel pipe inner seal ring inner inflatable chamber and central siphon
Logical steel pipe inner ring gas tube, modeling pipe inner end sealing plate, which is equipped with, will mould pipe inner seal ring inner inflatable chamber and central siphon inside is connected to
Pipe inner ring gas tube is moulded, the outer end-plate of modeling pipe, which is equipped with, will mould the modeling pipe being connected to inside pipe exterior seal ring inner inflatable chamber and central siphon
Outer ring gas tube.
Preferably, the central siphon is equipped with the pressure release gas vent being connected to central siphon inside, band moving frame is with central siphon by rubbing
Driving structure connection is wiped, friction driving structure includes promoting limit body, retracting limit body, friction band rotating ring, several push-pull rods, is pushed away
Pull rod is horizontal and push-pull rod one end connecting band moving frame, push-pull rod other end connection friction band rotating ring, friction band moving ring sleeve are located at axis
On pipe and coaxial with central siphon, friction band rotating ring can move horizontally on central siphon, and friction band rotating ring inner ring surface is equipped with friction sealed
Slot, friction sealed slot are equipped with drag seal, and drag seal is coaxial with central siphon, between drag seal and central siphon lateral wall
It squeezes mutually, promotes limit body, retracts limit body and be in that central siphon is outer and fix with central siphon, and limit base has for limiting steel
The sealing plate confined planes of outer end-plate are managed, pressure release gas vent, which is in, to be promoted limit body and retract between limit body, at friction band rotating ring
It is promoting limit body and is retracting between limit body, when friction band rotating ring contact promotes limit body, drag seal seals pressure release row
Stomata；When friction band rotating ring contact retracts limit body, drag seal is separated with pressure release gas vent.
Preferably, the propulsion limit body is annular in shape, the limit body that retracts is annular in shape, promotes limit body and central siphon same
It is coaxial with central siphon to retract limit body for axis.
Preferably, the air supply pipe from inside on-off admission line and central siphon by being connected to, the gas supply end of air feed pump connects
The other end of one end of logical air supply pipe, air supply pipe is connected to from one end of on-off air inlet pipe, from the other end and axis of on-off air inlet pipe
Connection inside pipe, friction band rotating ring are equipped with one piece of on-off transverse slat, on-off transverse slat pass through from on-off air inlet pipe and with from on-off into
Tracheae is slidingly sealed cooperation, and on-off transverse slat is equipped with plate venthole, when friction band rotating ring contact promotes limit body, plate venthole with
It is connected to from the inner passage of on-off air inlet pipe；When friction band rotating ring contact retracts limit body, on-off transverse slat will be from on-off air inlet pipe
Inner passage partition.
Preferably, the central siphon lateral wall is equipped with external screw thread, steel pipe inner end sealing plate inner ring surface is moulded in the sealing plate of pipe inner end
Anchor ring passes through the external screw thread on internal screw thread and central siphon lateral wall and is cooperatively connected, and central siphon is equipped with inflating port in first, in second
Inflating port, inflating port in first, in second inflating port be connected to inside central siphon；The first air flue is equipped in the sealing plate of steel pipe inner end,
First air flue outer end opening is opened on steel pipe inner end sealing plate inner ring surface, steel in steel pipe inner end sealing plate outer ring surface, the first air flue inner end
Pipe inner ring gas tube one end is connected to steel pipe inner seal ring inner inflatable chamber, the steel pipe inner ring gas tube other end is outside the first air flue
End is protruded into the first air flue, is sealed between steel pipe inner ring gas tube outer tube wall and the air flue inner wall of the first air flue, in the first air flue
Rectify to inflating port in first and is connected to inflating port in first；It moulds and is equipped with the second air flue in the sealing plate of pipe inner end, outside the second air flue
For end opening in modeling pipe inner end sealing plate outer ring surface, the second air flue inner end is opened on modeling pipe inner end sealing plate inner ring surface, modeling pipe inner ring inflation
Pipe one end is connected to modeling pipe inner seal ring inner inflatable chamber, moulds the pipe inner ring gas tube other end and protrude into first from the second air flue outer end
In air flue, moulds and sealed between pipe inner ring gas tube outer tube wall and the air flue inner wall of the second air flue, the second air flue inner end face second
It interior inflating port and is connected to inflating port in second.
Preferably, the steel pipe end for the steel modeling crossover sub that connection supports frame is supported is towards limit base, the propulsion is limited
Position body is in modeling and manages between outer end-plate and friction band rotating ring, retracts limit body and is in friction band rotating ring and between moving frame.
The beneficial effects of the present invention are: reasonable integral structure, in place to the positioning and clamping of steel modeling crossover sub, can ensure
Leakproofness but will not press from both sides damage steel modeling crossover sub；With can automatic adjusument sealing structure, can strengthen hyperbar detection when
Sealing effect, maintain the stability of detection process；Many places can disposably be carried out targetedly to detect, it is high-efficient, effect is good；
Have the control structure of multiple protective structure and coordinated type, can be to avoid problem caused by various maloperations, and movement connects
Continuous property is good, and work efficiency is high, and detection process is smooth efficiently.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of inventive joint support frame；
Fig. 3 is the enlarged drawing in Fig. 1 at A；
Fig. 4 is the enlarged drawing in Fig. 1 at B；
Fig. 5 is the enlarged drawing in Fig. 1 at C；
Fig. 6 is the enlarged drawing in Fig. 1 at D；
Fig. 7 is the enlarged drawing in Fig. 1 at E.
In figure: outer end seal is managed in air feed pump 1, air supply pipe 11, sliding rack 12, pump connection frame 13, support sliding rail 14, central siphon 2, modeling
Plate 21, modeling pipe exterior seal ring 211, modeling pipe outer ring gas tube 212, the outer end-plate 22 of steel pipe, steel pipe exterior seal ring 221, outside steel pipe
Enclose gas tube 222, modeling pipe inner end sealing plate 23, modeling pipe inner seal ring 231, modeling pipe inner ring gas tube 232, the second air flue 23a, steel pipe
Inner end sealing plate 24, steel pipe inner seal ring 241, steel pipe inner ring gas tube 242, the first air flue 24a, the first air inlet 2a, second into
Port 2b, third air inlet 2c, pressure release gas vent 2d, inflating port 2e in first, inflating port 2f, filling block 2g, limit in second
Seat 3, connection supports frame 4, support baseboard 41, supporting vertical plate 42, V-arrangement support slot 43, end socket cylinder body 51, end socket piston rod 52, band
Moving frame 53 promotes limit body 541, retracts limit body 542, friction band rotating ring 543, drag seal 5431, push-pull rod 544, pressure
Tight cylinder body 61, clamping piston bar 62, positioning plate 63, modeling pipeline section 71, lengths of steel pipes 72.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
In embodiment as shown in Figures 1 to 7, a kind of performing leak test machine, including mainframe, air feed pump 1, it further include envelope
Gas shutoff cylinder, compression cylinder, one closed at both ends and horizontal central siphon 2, the limit base 3 for contacting steel modeling crossover sub one end,
It is used to support steel modeling crossover sub and steel modeling crossover sub axis is made to be in the connection supports frame 4 of horizontality, block cylinder, pressure
Tight cylinder, connection supports frame are arranged on mainframe, and the closures cylinder includes end socket cylinder body 51, close with the sliding of end socket cylinder body
The end socket the cylinder piston for sealing cooperation, the end socket piston rod 52 being connect with end socket the cylinder piston, end socket piston rod level and end socket piston rod
Scalable direction it is horizontal, compression cylinder include compress cylinder body 61, with compress cylinder body and be slidingly sealed cooperation compression the cylinder piston, with
The clamping piston bar 62 of the cylinder piston connection is compressed, clamping piston bar is vertically and the scalable direction of clamping piston bar is vertical, compresses
Piston rod is equipped with the positioning plate 63 for compressing steel modeling crossover sub, and positioning plate is in above connection supports frame, end socket piston
Bar is equipped with the band moving frame 53 for driving central siphon axially to move horizontally along central siphon, and central siphon is equipped with cricoid modeling and manages outer end-plate
21, the outer end-plate 22 of cricoid steel pipe, modeling manage outer end-plate outer peripheral surface and are equipped with modeling pipe outside plate annular groove, the outer end-plate periphery of steel pipe
Face is equipped with steel pipe outside plate annular groove, modeling manage the outer end-plate of outer end-plate, steel pipe, mould pipe outside plate annular groove, steel pipe outside plate annular groove with
Central siphon is coaxial, and modeling pipe outside plate annular groove is equipped with the modeling pipe exterior seal ring 211 for contacting steel modeling crossover sub inner wall, steel pipe outside plate
Annular groove is equipped with the steel pipe exterior seal ring 221 for contacting steel modeling crossover sub inner wall, and central siphon is equipped with and is connected to inside central siphon
The first air inlet 2a, the first air inlet is equipped with the first breather check valve, and the first breather check valve can be served as reasons by direction
To outside central siphon in central siphon, central siphon outer wall is equipped with the first baroceptor, at the steel modeling crossover sub that connection supports frame is supported
It in limit base and blocks between cylinder, the gas supply end of air feed pump inside air supply pipe 11 and central siphon by being connected to, the central siphon outer wall
It is equipped with several filling block 2g for protruding into steel modeling crossover sub.It is outer that connectivity part inside air supply pipe and central siphon is located at modeling pipe
Between end-plate and closure cylinder.The reading display end of first baroceptor is in outside tested steel modeling crossover sub.It is described to connect
The steel pipe end of steel that head support is supported modeling crossover sub is towards limit base.Air feed pump is arranged on a sliding rack 12, gas supply
Pump is connect by pumping connection frame 13 with central siphon, and mainframe is equipped with support sliding rail 14, and sliding rack is slidably matched with support sliding rail, sliding
The slidably direction of moving frame is horizontal.Support sliding rail can assist being supported air feed pump, band moving frame etc., prevent end socket piston rod
Load (especially downward power) is excessive, while can carry out auxiliary guiding, improves course of work stability.
The lengths of steel pipes 72 and modeling 71 internal diameter of pipeline section of steel modeling crossover sub are not necessarily identical, and usually, modeling pipeline section internal diameter omits
(also there is lengths of steel pipes internal diameter to be in special circumstances greater than modeling pipeline section internal diameter, here only by taking usual situation as an example greater than lengths of steel pipes internal diameter
It is stated, and lengths of steel pipes internal diameter is greater than under the situation of modeling pipeline section internal diameter, testing principle is also identical).Connection supports frame
On can place steel modeling crossover sub (be usually by steel pipe segment frame on connection supports frame, or will modeling pipeline section frame in connector
On support frame), by steel modeling crossover sub one end (steel pipe end), against limit base, (steel pipe end in contact limit base, limit base is not
It is sealing structure, without sealing steel pipe end), clamping piston bar drives positioning plate to move down, and positioning plate contacts steel modeling crossover sub simultaneously
Steel modeling crossover sub is fixed and (pushed down), is stretched out with rear head piston rod, by being driven on central siphon and central siphon with moving frame
Modeling is managed the outer end-plate of outer end-plate, steel pipe and is protruded into steel modeling crossover sub together, reaches modeling and manages outer end-plate and be in and moulds pipe end and (mould
In pipeline section), the outer end-plate of steel pipe be in the state of steel pipe end (in lengths of steel pipes), and mould the cooperation modeling of pipe exterior seal ring and manage outer end-plate
The modeling pipe end of steel modeling crossover sub is sealed, the steel pipe end that steel is moulded crossover sub by end-plate outside steel pipe exterior seal ring cooperation steel pipe
It seals.Then it can use air feed pump and central siphon inside supplied by air supply pipe, gas enters steel through the first air inlet and moulds
In crossover sub, after certain pressure value to be achieved (pressure value can according in actual use gas or fluid pressure carry out
Setting, generally can be 1 to 8 times of atmospheric pressure), stop gas supply (due to the usually included check valve of air feed pump, so steel modeling conversion connects
Gas in head, in central siphon will not then need supplying from gas supply pump reflux and leakage according to the air feed pump without check valve
The gas supply end setting check valve or on-off valve of pump, steel is moulded in crossover sub after being stopped the supple of gas or steam with guarantee, the gas in central siphon will not return
Stream).After air pressure in tested steel modeling crossover sub is basicly stable, the reading display end of the first baroceptor of continuous observation, if
Numerical value is unchanged in a period of time or numerical value change in the reasonable scope, it is qualified to be tested steel modeling crossover sub air-tightness.It has detected
Cheng Hou separates air feed pump and air supply pipe (usually cylinder special plastic hose can also use metal bellows etc.), moulds to steel
After high pressure gas release in crossover sub, in central siphon, central siphon can be pulled out again.In the different detection space of two volume sizes
It is interior, if being inflated to uniform pressure, then leakage equity of gas, then capacious detection space internal drop is smaller, it is capacious
It is larger (although leakage gas flow is identical, leakage gas proportion is different) to detect space internal drop.Have filling block it
Afterwards, being equivalent to reduces internal detection space, if occurring gas leakage at this time, pressure drop can become apparent from (baroceptor reading change
Change also relatively faster), so setting filling block can allow the present invention to have higher detection accuracy and better detection effect.
The connection supports frame includes horizontal 41, two vertical and parallel to each other supporting vertical plates 42 of support baseboard, branch
Support vertical plate be equipped with for accommodate steel modeling crossover sub V-arrangement support slot 43, V-arrangement support slot it is opening up, under supporting vertical plate
End is fixed with support baseboard top surface, in a supporting vertical plate: V-arrangement support slot runs through two plate faces of supporting vertical plate.Utilize two
The V-arrangement support slot of a supporting vertical plate upper end is supported and limits to tested steel modeling crossover sub as support construction.
The central siphon is equipped with cricoid modeling pipe inner end sealing plate 23, cricoid steel pipe inner end sealing plate 24, moulds pipe inner end sealing plate
Outer peripheral surface is equipped with modeling pipe inner panel annular groove, and steel pipe inner end sealing plate outer peripheral surface is equipped with steel pipe inner panel annular groove, moulds on pipe inner panel annular groove
Equipped with the modeling pipe inner seal ring 231 for contacting steel modeling crossover sub inner wall, steel pipe inner panel annular groove is equipped with for contacting steel modeling
The steel pipe inner seal ring 241 of crossover sub inner wall, modeling pipe inner end sealing plate, steel pipe inner end sealing plate, modeling pipe inner panel annular groove, steel pipe inner panel
Annular groove is coaxial with central siphon, and modeling pipe inner end sealing plate is in steel pipe inner end sealing plate and modeling is managed between outer end-plate, steel pipe inner end sealing plate
Be between modeling pipe inner end sealing plate and the outer end-plate of steel pipe, central siphon be equipped with the second air inlet 2b be connected to inside central siphon and
The third air inlet 2c being connected to inside central siphon, central siphon outer wall are equipped with the second baroceptor, third baroceptor, first into
Port and the first baroceptor are between the outer end-plate of steel pipe and steel pipe inner end sealing plate, the second air inlet and the second air pressure
Sensor is between steel pipe inner end sealing plate and modeling pipe inner end sealing plate, and third air inlet and third baroceptor are in modeling
Pipe inner end sealing plate and modeling are managed between outer end-plate, and the second air inlet is equipped with the second breather check valve, and third air inlet is equipped with
Third breather check valve, the second breather check valve can be by axis by direction by direction, third breather check valve
To outside central siphon in pipe.The reading display end of second baroceptor, the reading display end of third baroceptor are in tested
Outside steel modeling crossover sub (induction end of the first baroceptor is between the outer end-plate of steel pipe and steel pipe inner end sealing plate, and second
The induction end of baroceptor is between steel pipe inner end sealing plate and modeling pipe inner end sealing plate, at the induction end of third baroceptor
It is managed between outer end-plate in modeling pipe inner end sealing plate and modeling).Modeling pipe inner end sealing plate and steel pipe inner end sealing plate are increased (with modeling pipe outer end
The outer end-plate of sealing plate, steel pipe is the same, as central siphon is protruded into together in steel modeling crossover sub), so as to disposably carry out " three sections
Detection ", respectively lengths of steel pipes, modeling pipeline section and linkage section (Butt Section of lengths of steel pipes and modeling pipeline section), the outer end-plate of steel pipe and steel
The air-tight cavity of detection lengths of steel pipes is formed between the sealing plate of pipe inner end, is formed detection between steel pipe inner end sealing plate and modeling pipe inner end sealing plate and is connected
The air-tight cavity of section is connect, pipe inner end sealing plate is moulded and the air-tight cavity for forming detection modeling pipeline section between outer end-plate is managed in modeling, air feed pump passes through
First air inlet, the second air inlet, third air inlet are simultaneously inflated each section of air-tight cavity, the first baroceptor, second
Baroceptor, third baroceptor then can be simultaneously to each section of progress air pressure detections, so as to quickly and effectively obtain whether deposit
In crack and leakage, and which section specific leakage part is.
The steel pipe exterior seal ring, steel pipe inner seal ring, modeling pipe inner seal ring, modeling pipe exterior seal ring be it is internal have fill
The gas-flow closure circle of air cavity, the outer end-plate of steel pipe are equipped with the steel that will be connected to inside steel pipe exterior seal ring inner inflatable chamber and central siphon
Pipe outer ring gas tube 222, steel pipe inner end sealing plate are equipped with the steel that will be connected to inside steel pipe inner seal ring inner inflatable chamber and central siphon
Pipe inner ring gas tube 242, modeling pipe inner end sealing plate, which is equipped with, will mould the modeling being connected to inside pipe inner seal ring inner inflatable chamber and central siphon
Pipe inner ring gas tube 232, the outer end-plate of modeling pipe, which is equipped with, will mould the modeling being connected to inside pipe exterior seal ring inner inflatable chamber and central siphon
Pipe outer ring gas tube 212.Further, steel pipe exterior seal ring, steel pipe inner seal ring, modeling pipe inner seal ring, modeling pipe in this programme
Exterior seal ring is gas-flow closure circle, so that its leakproofness is adjustable.(such as rubber when above-mentioned each sealing ring is conventional seals circle
The solid sealing ring of glue), in order to guarantee that airtight effect when detection, sealing ring need tightly to press between steel modeling crossover sub inner wall
Patch, this results in the friction when entering steel and moulding crossover sub of each sealing ring greatly, to easily lead into difficult and easy Fast Wearing.
And in the present solution, above-mentioned each sealing ring is all non-aerating, so that central siphon and each sealing plate, each sealing ring can be smooth before detection
It protrudes into steel modeling crossover sub, after protruding into place, air feed pump supplies central siphon inside, and gas is in addition to entering each section of seal chamber
Outside, can also enter steel pipe exterior seal ring through steel pipe outer ring gas tube, steel pipe inner seal ring is entered through steel pipe inner ring gas tube,
It is moulded pipe inner ring gas tube to enter modeling pipe inner seal ring, enter modeling pipe exterior seal ring through modeling pipe outer ring gas tube, to be formed
Each section of sealing.Also, each section of airtight cavity pressure is bigger, and pressure is also bigger in each sealing ring, so having detection air pressure and close
The autonomous adaptation regulating power of envelope ability can effectively prevent sealing insufficient or excessive seal.And it detects and completes, discharge steel modeling turn
In changing-over head and when axis overpressure, high pressure gas can be released in each sealing ring, and each sealing ring connects with steel modeling conversion after pressure release
It is minimum there is no rubbing or rubbing between head, so that each sealing plate on central siphon and central siphon directly be allowed to be detached from steel modeling crossover sub i.e.
It can.After form using gas-flow closure circle, " three sections of detections " (lengths of steel pipes, modeling pipeline section, linkage section) observation baroceptor is read
When number, first there is apparent pressure drop (beyond zone of reasonableness) in the baroceptor in which section, which section gas leakage just illustrated, is existed
Crack or seal defect.In addition, one or several filling blocks are all distributed in lengths of steel pipes, modeling pipeline section, linkage section.
The central siphon is equipped with the pressure release gas vent 2d being connected to central siphon inside, band moving frame and central siphon and passes through friction drive knot
Structure connection, friction driving structure include promoting limit body 541, retracting limit body 542, friction band rotating ring 543, several push-pull rods
544, push-pull rod is horizontal and push-pull rod one end connecting band moving frame, the connection of the push-pull rod other end rub with rotating ring, friction band moving ring sleeve
It is located on central siphon and coaxial with central siphon, friction band rotating ring can move horizontally on central siphon, and friction band rotating ring inner ring surface, which is equipped with, to rub
Seal groove is wiped, friction sealed slot is equipped with drag seal 5431, and drag seal is coaxial with central siphon, drag seal and central siphon
It is squeezed mutually between lateral wall, promotes limit body, retracts limit body and be in that central siphon is outer and fix with central siphon, and limit base has
For limiting the sealing plate confined planes of end-plate outside steel pipe, the horizontal space of end-plate and limit base is less than or equal to steel pipe outside steel pipe
The horizontal space of outer end-plate and central siphon, pressure release gas vent, which is in, to be promoted limit body and retracts between limit body, friction band rotating ring
It is in and promotes limit body and retract between limit body, when friction band rotating ring contact promotes limit body, drag seal seals pressure release
Gas vent；When friction band rotating ring contact retracts limit body, drag seal is separated with pressure release gas vent.The propulsion limit body is in
Ring-type, the limit body that retracts is annular in shape, promotes limit body coaxial with central siphon, it is coaxial with central siphon to retract limit body.Promote limit
Body is in modeling and manages between outer end-plate and friction band rotating ring, retracts limit body and is in friction band rotating ring and between moving frame.
This programme can realize pressurization protection and releasing pressure automatically.When being detected, end socket piston rod stretches out, and passes through band
Moving frame, push-pull rod carry out band dynamic friction and drive ring set mobile, since there is drag seal between friction band moving ring sleeve and central siphon, and
Mutual extrusion friction between drag seal and central siphon lateral wall, so friction band moving ring sleeve can be straight by drag seal at this time
Tape splicing moving axis pipe is mobile, so that central siphon is can enter steel modeling crossover sub together with each sealing plate, touches limit base to end-plate outside steel pipe
On sealing plate confined planes after, central siphon positioning cannot move on, and the band rotating ring that rubs can continue to push and be advanced until and touch
Limit body is promoted, end socket cylinder body stops working (pressure release gas vent is sealed by drag seal at this time).In the present solution, only completing
The entirety of central siphon and each sealing plate is protruded into, is positioned, and pressure release gas vent can just be sealed by drag seal, just can smoothly allow central siphon
Inflation, pressure maintaining are realized in interior, each sealing ring, to just can be carried out detection.And after the completion of detecting, end socket piston rod is directly withdrawn,
Since each sealing ring is in swelling state at this time, tightly it is affixed between steel modeling crossover sub, so central siphon is equal together with each sealing plate
It can not move, end socket piston rod can only will be rubbed and be retracted with rotating ring by band moving frame, push-pull rod, until friction band rotating ring contact drawing
Limit body is returned, and in the process, drag seal can leave pressure release gas vent, and in central siphon, gas can be discharged in each sealing ring,
In each sealing ring after gas discharge, sealing effect disappears, and the gas in steel modeling crossover sub (i.e. in three seal sections) can also be arranged
It (is no longer tightly affixed between each sealing ring and steel modeling crossover sub at this time) out, thus continue to withdraw with end socket piston rod,
Central siphon can also be drawn out together with each sealing plate, be detached from steel modeling crossover sub.It is dynamic that the above process eliminates all extra pressure releases
Make (separation, the docking operation of such as air supply pipe and air feed pump), disposably realize first release stress, delay pulls out the dynamic of central siphon afterwards
Make, whole process is reasonable, coherent, efficient.
The central siphon lateral wall is equipped with external screw thread, and steel pipe inner end sealing plate inner ring surface, modeling pipe inner end sealing plate inner ring surface are logical
The external screw thread crossed on internal screw thread and central siphon lateral wall is cooperatively connected, and central siphon is equipped with inflating port 2e in first, inflating port in second
2f, inflating port in first, in second inflating port be connected to inside central siphon；The first air flue 24a is equipped in the sealing plate of steel pipe inner end, the
One air flue outer end opening is opened on steel pipe inner end sealing plate inner ring surface, steel pipe in steel pipe inner end sealing plate outer ring surface, the first air flue inner end
Inner ring gas tube one end is connected to steel pipe inner seal ring inner inflatable chamber, the steel pipe inner ring gas tube other end is from the first air flue outer end
It protrudes into the first air flue, is sealed between steel pipe inner ring gas tube outer tube wall and the air flue inner wall of the first air flue, the first air flue inner end
It inflating port and is connected to inflating port in first in face first；It moulds and is equipped with the second air flue 23a in the sealing plate of pipe inner end, outside the second air flue
For end opening in modeling pipe inner end sealing plate outer ring surface, the second air flue inner end is opened on modeling pipe inner end sealing plate inner ring surface, modeling pipe inner ring inflation
Pipe one end is connected to modeling pipe inner seal ring inner inflatable chamber, moulds the pipe inner ring gas tube other end and protrude into first from the second air flue outer end
In air flue, moulds and sealed between pipe inner ring gas tube outer tube wall and the air flue inner wall of the second air flue, the second air flue inner end face second
It interior inflating port and is connected to inflating port in second.Steel pipe inner seal ring is fixed on steel pipe inner panel annular groove, and modeling pipe inner seal ring is solid
It is scheduled on modeling pipe inner panel annular groove.After having segmentation detection function, the whole detection inside steel modeling crossover sub can be still carried out,
Before needing to carry out the inside overall tightness detection of steel modeling crossover sub, turn steel pipe inner end sealing plate, modeling pipe inner end sealing plate are only needed,
The first air flue inner end is allowed to be misaligned, not be connected to inflating port in first, inflating port is allowed in the second air flue inner end and second to be misaligned,
Be not connected to, in this way, be inflated again, pressure maintaining, detection when, only steel pipe exterior seal ring and modeling pipe exterior seal ring play sealing
Effect, so as to realize the overall tightness detection inside steel modeling crossover sub (remaining step is identical as segmentation detection).It is whole
After the completion of physical examination is surveyed, segmentation detection is if desired carried out again, then first turn steel pipe inner end sealing plate, modeling pipe inner end sealing plate, make in steel pipe
End-plate, modeling pipe inner end seals sheet reset can re-start segmentation detection.
In addition, there is minimum probability, it may appear that following situations: steel moulds the leakage position on crossover sub, just by connector
The detection location structure such as support frame, positioning plate blocks, and is not detected among out gas leakage, needle so as to cause these leakage positions when detection
In this regard, further increasing testing result accuracy if wanting to improve, steel modeling crossover sub can be existed after the completion of one-time detection
An angle, such as 20 degree are rotated along steel modeling crossover sub axis on connection supports frame, in this way, connection supports frame, positioning plate
Or on positioning plate for contact the structure etc. of steel modeling crossover sub be contacted again steel modeling crossover sub position can with it is preceding primary
Contact position it is different, in conjunction with testing result twice, so that it may must tap mould crossover sub leakproofness whether He Ge conclusion.
Claims (4)
1. a kind of performing leak test machine, including mainframe, air feed pump, characterized in that further include blocking cylinder, compression cylinder, one
Root central siphon closed at both ends and horizontal, is used to support steel modeling crossover sub at the limit base for contacting steel modeling crossover sub one end
And steel modeling crossover sub axis is made to be in the connection supports frame of horizontality, it blocks cylinder, compression cylinder, connection supports frame and is all provided with
It sets on mainframe, the closure cylinder includes end socket cylinder body, end socket the cylinder piston, end socket piston rod, and end socket piston rod is stretched
Contracting direction is horizontal, and compression cylinder includes compressing cylinder body, compressing the cylinder piston, clamping piston bar, the scalable direction of clamping piston bar
Vertically, clamping piston bar is equipped with the positioning plate for compressing steel modeling crossover sub, and positioning plate is in above connection supports frame, envelope
Head piston rod is equipped with the band moving frame for driving central siphon axially to move horizontally along central siphon, and central siphon is equipped with cricoid modeling pipe outer end
The outer end-plate of sealing plate, cricoid steel pipe, modeling manage outer end-plate outer peripheral surface and are equipped with modeling pipe outside plate annular groove, the outer end-plate periphery of steel pipe
Face is equipped with steel pipe outside plate annular groove, modeling manage the outer end-plate of outer end-plate, steel pipe, mould pipe outside plate annular groove, steel pipe outside plate annular groove with
Central siphon is coaxial, and modeling pipe outside plate annular groove is equipped with the modeling pipe exterior seal ring for contacting steel modeling crossover sub inner wall, steel pipe outside plate ring
Slot is equipped with the steel pipe exterior seal ring for contacting steel modeling crossover sub inner wall, and central siphon is equipped with first be connected to central siphon inside
Air inlet, the first air inlet be equipped with the first breather check valve, the first breather check valve can by direction be by central siphon extremely
Outside central siphon, central siphon outer wall is equipped with the first baroceptor, and the steel modeling crossover sub that connection supports frame is supported is in limit base
Between closure cylinder, by being connected to inside air supply pipe and central siphon, the central siphon outer wall is equipped with several at the gas supply end of air feed pump
Filling block for protruding into steel modeling crossover sub, the central siphon is equipped in cricoid modeling pipe inner end sealing plate, cricoid steel pipe
End-plate, modeling pipe inner end sealing plate outer peripheral surface are equipped with modeling pipe inner panel annular groove, and steel pipe inner end sealing plate outer peripheral surface is equipped with steel pipe inner panel
Annular groove, modeling pipe inner panel annular groove is equipped with the modeling pipe inner seal ring for contacting steel modeling crossover sub inner wall, on steel pipe inner panel annular groove
Equipped with the steel pipe inner seal ring for contacting steel modeling crossover sub inner wall, modeling pipe inner end sealing plate, steel pipe inner end sealing plate, modeling pipe inner panel
Annular groove, steel pipe inner panel annular groove are coaxial with central siphon, and modeling pipe inner end sealing plate is in steel pipe inner end sealing plate and modeling is managed between outer end-plate,
Steel pipe inner end sealing plate is between modeling pipe inner end sealing plate and the outer end-plate of steel pipe, and central siphon is equipped with second be connected to central siphon inside
Air inlet, the third air inlet being connected to central siphon inside, central siphon outer wall are equipped with the second baroceptor, third air pressure sensing
Device, the first air inlet and the first baroceptor are between the outer end-plate of steel pipe and steel pipe inner end sealing plate, the second air inlet
It is between steel pipe inner end sealing plate and modeling pipe inner end sealing plate with the second baroceptor, third air inlet and third air pressure sensing
Device is in modeling pipe inner end sealing plate and modeling is managed between outer end-plate, the second air inlet equipped with the second breather check valve, third into
Port is equipped with third breather check valve, and the second breather check valve can pass through direction, the side of passing through of third breather check valve
Xiang Junwei by central siphon to outside central siphon, the steel pipe exterior seal ring, steel pipe inner seal ring, modeling pipe inner seal ring, modeling pipe external seal
Circle is the internal gas-flow closure circle with inflatable chamber, the outer end-plate of steel pipe be equipped with by steel pipe exterior seal ring inner inflatable chamber with
The steel pipe outer ring gas tube being connected to inside central siphon, steel pipe inner end sealing plate are equipped with steel pipe inner seal ring inner inflatable chamber and central siphon
The steel pipe inner ring gas tube of inside connection, modeling pipe inner end sealing plate are equipped with and will mould inside pipe inner seal ring inner inflatable chamber and central siphon
The modeling pipe inner ring gas tube of connection, the outer end-plate of modeling pipe are equipped with to mould and be connected to inside pipe exterior seal ring inner inflatable chamber and central siphon
Modeling pipe outer ring gas tube, the central siphon be equipped with the pressure release gas vent that be connected to inside central siphon, band moving frame passes through with central siphon rubs
Driving structure connection is wiped, friction driving structure includes promoting limit body, retracting limit body, friction band rotating ring, several push-pull rods, is pushed away
Pull rod is horizontal and push-pull rod one end connecting band moving frame, push-pull rod other end connection friction band rotating ring, friction band moving ring sleeve are located at axis
On pipe and coaxial with central siphon, friction band rotating ring can move horizontally on central siphon, and friction band rotating ring inner ring surface is equipped with friction sealed
Slot, friction sealed slot are equipped with drag seal, and drag seal is coaxial with central siphon, between drag seal and central siphon lateral wall
It squeezes mutually, promotes limit body, retracts limit body and be in that central siphon is outer and fix with central siphon, and limit base has for limiting steel
The sealing plate confined planes of outer end-plate are managed, pressure release gas vent, which is in, to be promoted limit body and retract between limit body, at friction band rotating ring
It is promoting limit body and is retracting between limit body, when friction band rotating ring contact promotes limit body, drag seal seals pressure release row
Stomata；When friction band rotating ring contact retracts limit body, drag seal is separated with pressure release gas vent；It is set on the central siphon lateral wall
There is external screw thread, steel pipe inner end sealing plate inner ring surface, modeling pipe inner end sealing plate inner ring surface pass through outer on internal screw thread and central siphon lateral wall
It is threadedly engaged connection, central siphon is equipped with inflating port in first, inflating port in second, and inflating port in first, inflating port is equal in second
It is connected to central siphon inside；The first air flue is equipped in the sealing plate of steel pipe inner end, the first air flue outer end opening is in steel pipe inner end sealing plate outer ring
Face, the first air flue inner end are opened on steel pipe inner end sealing plate inner ring surface, inside steel pipe inner ring gas tube one end and steel pipe inner seal ring
Inflatable chamber connection, the steel pipe inner ring gas tube other end protrude into the first air flue from the first air flue outer end, outside steel pipe inner ring gas tube
Sealed between tube wall and the air flue inner wall of the first air flue, in the first air flue inner end face first inflating port and with first in inflating port
Connection；It moulds and is equipped with the second air flue in the sealing plate of pipe inner end, the second air flue outer end opening is in modeling pipe inner end sealing plate outer ring surface, the second air flue
Inner end be opened on modeling pipe inner end sealing plate inner ring surface, modeling pipe inner ring gas tube one end with mould pipe inner seal ring inner inflatable chamber be connected to,
The modeling pipe inner ring gas tube other end protrudes into the first air flue from the second air flue outer end, moulds pipe inner ring gas tube outer tube wall and the second gas
It seals between the air flue inner wall in road, inflating port and is connected to inflating port in second in the second air flue inner end face second.
2. a kind of performing leak test machine according to claim 1, characterized in that the connection supports frame includes horizontal branch
Bottom plate, two vertical and parallel to each other supporting vertical plates are supportted, supporting vertical plate is equipped with the V-arrangement branch for accommodating steel modeling crossover sub
Support slot, V-arrangement support slot it is opening up, supporting vertical plate lower end is fixed with support baseboard top surface.
3. a kind of performing leak test machine according to claim 1, characterized in that the propulsion limit body is annular in shape, described
It is annular in shape to retract limit body, promotes limit body coaxial with central siphon, it is coaxial with central siphon to retract limit body.
4. a kind of performing leak test machine according to claim 1 or 3, characterized in that the connection supports frame was supported
Steel moulds the steel pipe end of crossover sub towards limit base, promotes limit body to be in modeling and manages between outer end-plate and friction band rotating ring, draws
It returns limit body and is in friction band rotating ring and between moving frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610183371.7A CN105841897B (en) | 2016-03-26 | 2016-03-26 | A kind of performing leak test machine |
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| CN201610183371.7A CN105841897B (en) | 2016-03-26 | 2016-03-26 | A kind of performing leak test machine |
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| CN105841897B true CN105841897B (en) | 2019-02-05 |
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| CN107941502B (en) * | 2017-12-26 | 2024-02-27 | 吉林大学 | Device for measuring static friction force and dynamic friction force of sealing ring under different pressure forces |
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| CN105841897A (en) | 2016-08-10 |
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Effective date of registration: 20181225 Address after: 116620 No. 86 Liaohe East Road, ShuangD Port, Dalian Economic and Technological Development Zone, Liaoning Province Applicant after: Dalian Hermetic Pumps Co.,Ltd. Address before: 311835 Wangjia village, Shang Fan Village, Dian Kou Town, Zhuji City, Shaoxing, Zhejiang 99 Applicant before: Xuan Yueluo |
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