CN201653816U - Welded pipe air pressure test device - Google Patents

Welded pipe air pressure test device Download PDF

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Publication number
CN201653816U
CN201653816U CN2010201761543U CN201020176154U CN201653816U CN 201653816 U CN201653816 U CN 201653816U CN 2010201761543 U CN2010201761543 U CN 2010201761543U CN 201020176154 U CN201020176154 U CN 201020176154U CN 201653816 U CN201653816 U CN 201653816U
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CN
China
Prior art keywords
relay
pressure test
welded
test device
welded tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010201761543U
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Chinese (zh)
Inventor
吴通良
郭阿富
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ZHENHAI PETROCHEMICAL JIANAN ENGINEERING Co Ltd
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ZHENHAI PETROCHEMICAL JIANAN ENGINEERING Co Ltd
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Priority to CN2010201761543U priority Critical patent/CN201653816U/en
Application granted granted Critical
Publication of CN201653816U publication Critical patent/CN201653816U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a welded pipe air pressure test device, which comprises a water tank, a compressor, a crane, an air inlet pipe and an air outlet pipe, wherein the air inlet pipe and the air outlet pipe are both provided with control valves, one end of the air inlet pipe is connected to the compressor, and the other ends of the air inlet pipe and the air outlet pipe are respectively provided with adapters used for being inserted with ends of welded pipes. The welded pipe air pressure test device is characterized in that a safety cover covered at the opening of the water tank is hinged to a side wall of the opening of the water tank, the safety cover is fixedly connected with a cable on a hoist, and an automatic linkage gear is arranged between control circuits of the hoist and the compressor. As the air pressure test device is added with the safety cover and provided with the automatic linkage gear, defects such as microcracks of welded pipe products can be found out in time, quality of the welded pipe products can be controlled effectively, and operation safety of operators can be guaranteed. Simultaneously, by aid of the hoist and the crane, labor intensity of the operators is reduced greatly, and operation efficiency is increased. Therefore, the welded pipe air pressure test device can be applied to production industries of various types of welded pipes and seamless pipes widely.

Description

A kind of welded tube gas pressure test device
Technical field
The utility model relates to a kind of pressure-bearing proving installation of welded tube, specifically refers to a kind of gas pressure test device of welded tube.
Background technology
The welded tube that production adopted, as be used for the stainless steel welded pipe of coiled heat exchanger tube bank, before using, not only to make comprehensive mechanical property, chemical analysis, physical and chemical index and EDDY CURRENT to mother metal, but also to carry out strict intensity, tightness test by root by the requirement of product, with intensity and the compactness requirement of satisfying final products.And traditional test unit can only carry out water pressure test for strength, adopts this technology to be difficult to find penetrability defectives such as micro-crack, and has a small amount of water in the welded tube, and working strength of workers is also big.
For this reason, people design under water, and the airtight strength test device comes, as Chinese patent Granted publication number for " the steel pipe air underwater pressure test machine " of CN2639876Y just disclosed so a kind of structure, this steel pipe air underwater pressure test machine is provided with some tanks, between tank and the tank reversing pump is installed, the both sides of tank are provided with water intaking valve and draining valve, are fixed with fixed station on the tank, linking to each other with fixed station is connected to aerating device, controller for electric consumption control aerating device and reversing pump.During test, welded tube is put into tank, then in welded tube, feed gases at high pressure, observe the bubble in the tank then, judge the quality of welded tube by having or not bubble.Adopt this gas pressure test machine, can find penetrability defectives such as welded tube micro-crack, thus overcome to a certain extent the traditional experiment device existing drawback.But this airtight strength test device perhaps under suitable air pressure, because of welding tube quality produces explosion, hits the operating personnel to such an extent as to hinder if air pressure is too high, therefore still has certain potential safety hazard.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned prior art present situation, and a kind of same welded tube gas pressure test device that can find penetrability defectives such as welded tube micro-crack and handling safety is provided.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this welded tube gas pressure test device comprises tank, compressor, the crane of lifting welded tube and the draft tube that operation valve is installed, escape pipe, wherein draft tube one end is connected in described compressor, be respectively equipped with the interface unit that inserts for the welded tube port on the other end of described draft tube and described escape pipe, it is characterized in that: the safety screen that is covered with the tank oral area arranged in that the oral area of described tank is side walls hinged, this safety screen is connected mutually with drag-line on the windlass, is provided with automatic linkage simultaneously between the control loop of windlass and compressor.
Preferred version of the present utility model is, described automatic linkage comprises first relay, second relay and is installed in electro connecting pressure gauge on the described draft tube, the set pressure of this electro connecting pressure gauge is following to be in series for normally closed normally closed contact and the coil of second relay, the coil of the normally opened contact of second relay and the 3rd relay is in series, and the normally opened contact of the 3rd relay is serially connected on the power lead of control loop of described windlass; The normally opened contact of the above action of the set pressure of described electro connecting pressure gauge and the coil of first relay are in series, the normally closed contact of this first relay is serially connected on the power lead of control loop of contactor coil, and the main contacts of described contactor is serially connected in the major loop of described compressor.Utilize promptly that electro connecting pressure gauge begins to move under set pressure often open, normally closed contact is controlled windlass and the startup of compressor, guarantees to have in welded tube under the situation of pressure, the windlass dead electricity can't be opened safety screen, to guarantee operating personnel's safety.
The control loop of described crane is connected in power supply behind the normally opened contact of described the 3rd relay, and described safety screen is provided with upper limit position switch and lower position switch, and wherein the contact of upper limit position switch is serially connected on the power lead of described crane control loop.Have in welded tube like this under the situation of pressure, safety screen can not be opened, and the suspension hook of crane can not oscilaltion simultaneously.
For the drag-line that prevents windlass in use ruptures because of wearing and tearing; Perhaps malfunctioning in order to prevent windlass, more preferably scheme is also to dispose the auxiliary catch that hooks safety screen under the safety screen open mode on the described column.
Described tank is other can also to be provided with a column, and described column is provided with revolvable arm, and crane is fixed on the described arm, during work, by means of crane, can carry welded tube like a cork.
Scheme is preferably, can also be provided with fixed pulley on described column, lies in described safety screen behind this fixed pulley of the guy cable rounds on the described windlass.
Can also be separately installed with tensimeter on described draft tube and the escape pipe, so that know the pressure in the welded tube intuitively.
Described safety screen can include in body frame that angle steel is welded and the body frame reinforcement that direction anyhow distributes, silk screen is fixed on described body frame and the reinforcement, being fixed with simultaneously for described drag-line on described reinforcement is the suspension ring of establishing, and such structure has alleviated the weight of safety screen again when satisfying safety screen intensity.
Compared with prior art; because the utility model has been set up safety screen; dispose automatic interlocking device simultaneously, thereby in use, can not only find the defectives such as micro-crack of welded tube product in time; make product quality be effectively controlled; but also protected operating personnel's handling safety, and utilize windlass and crane simultaneously, also alleviated operating personnel's labour intensity widely; improved operating efficiency, so can be widely used in the production industry of all kinds of welded tubes and solid drawn tube.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of safety screen among Fig. 1;
Fig. 3 is the electrical schematic diagram of the utility model automatic interlocking device.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, this welded tube gas pressure test device is used for detecting stainless steel welded pipe 7, this stainless steel welded pipe is used to make the coiled heat exchanger tube bank, it comprises tank 1, be covered with the safety screen 2 of tank oral area, welded tube derricking gear 3, safety screen mechanism for opening/closing 4 and aerating device 5, wherein tank 1 is arranged on the terrace 6, safety screen 2 is hinged on the sidewall of tank oral area, this safety screen includes in the body frame that is welded with angle steel 21 and the body frame reinforcement 22 that direction anyhow distributes, silk screen is fixed with suspension ring 23 simultaneously by being bolted on body frame and the reinforcement on reinforcement.
Above-mentioned welded tube derricking gear 3 comprises the column 31 that is built up in tank 1 side, and column is provided with revolvable arm 32, and crane 33 is fixed on the arm, is used for lifting by crane stainless steel welded pipe 7.
Above-mentioned safety screen mechanism for opening/closing 4 comprises windlass 41 that is fixed on the column 31 and the fixed pulley 42 that is positioned at the windlass top, and the drag-line 43 of windlass lies in the suspension ring 23 of safety screen after walking around this fixed pulley, so that open and close safety screen as required.
For the drag-line that prevents windlass in use ruptures because of wearing and tearing, prevent that perhaps windlass is malfunctioning, in the present embodiment, also disposing the auxiliary catch 10 that under the safety screen open mode, hooks safety screen on the column, this auxiliary catch is subjected to the control of electromagnet 9, hooks safety screen after can rotating a little with respect to column 31.
Above-mentioned aerating device 5 comprises compressor 51, draft tube 52 and the escape pipe 53 that is positioned at tank 1 one sides, the gas outlet of compressor connects an end of draft tube 52, the other end of draft tube is fixed with interface unit 54, this interface unit can insert and the locking welded tube for stainless steel welded pipe 7 one ports, promptly is used for connecting fast welded tube.Escape pipe 53 is bearing on the support 8, and an end of this escape pipe is connected the floor drain 61 on terrace.The escape pipe other end is fixed with interface unit 54 equally, so that connect the another port of stainless steel welded pipe fast.In order and to advance the gaseous tension in break-make pressure gas and the understanding welded tube, first operation valve 55 and first is installed on draft tube is pressed table 56, and second operation valve 57 and second tensimeter 58 are installed on the escape pipe.
As shown in Figure 3, the control loop of compressor M1 (being label 51 among Fig. 1), windlass M2 (being the label 41 among Fig. 1) and crane M3 (being the label 33 among Fig. 1) can adopt conventional startup, stop operation circuit figure, in the present embodiment, they obtain required power supply by transformer B respectively, electrical control divides automatically, manually control, automatically be used for operate as normal, when equipment breaks down, then use manually control.In order to prevent that misoperation is arranged in the operating process, between the control loop of above-mentioned windlass and compressor, also be provided with automatic linkage, this automatic linkage comprises first relay K 1, second relay K 2 and the electro connecting pressure gauge 59 that is installed on the described draft tube, this electro connecting pressure gauge has that (being periods of low pressure) is normally closed normally closed contact P2 below the pressure of setting, the normally opened contact P1 of (being high pressure phase) action more than the pressure of setting, the coil of the normally closed contact P2 and second relay is in series, see also Fig. 3, the coil of the normally opened contact of second relay K 2 and the 3rd relay K 3 is in series, and the normally opened contact of the 3rd relay K 3 is serially connected on the power lead of control loop of windlass; (be in series with the coil of first relay, the normally closed contact of this first relay is serially connected on the power lead of control loop of contactor KM coil the normally opened contact P1 of electro connecting pressure gauge, and the main contacts of contactor KM is serially connected in the major loop of compressor 51.The concrete numerical value of the set pressure of above-mentioned electro connecting pressure gauge can be decided by the pressure testing requirement of different product, and in the present embodiment, the set pressure of electro connecting pressure gauge is 0.5MPa.
The control loop of crane also is connected in power supply behind the normally opened contact of the 3rd relay, and safety screen is provided with upper limit position switch and lower position switch, and wherein the contact of upper limit position switch is serially connected on the power lead of crane control loop.Have in welded tube like this under the situation of pressure, safety screen can not be opened, and the suspension hook of crane can not oscilaltion simultaneously.
During work, stainless steel welded pipe is lifted by crane the screw clamp top,, then stainless steel welded pipe is put in the tank by as shown in Figure 1 the two-port of stainless steel welded pipe being inserted into respectively on the interface unit of tracheae with the suspension hook of crane.During pressure testing, the power turn-on switch QS1 of elder generation, because the interior air pressure of welded tube this moment is zero, therefore, the normally closed contact P2 closure of electro connecting pressure gauge, second relay K 2 adhesives this moment make 3 adhesives of the 3rd relay K thereupon, and the control loop of windlass M2 and crane M3 is the normally closed contact energized by the 3rd relay all.As long as hand/automatic switch is pulled out to automatic transmission, disconnect its contact ZK1 if adopt control automatically this moment, and ZK2 connects.Press start button SB2, contactor KM adhesive, compressor starts operation; The 9th relay K 9 adhesives simultaneously, after making the normally opened contact closure of the 9th relay K 9,2 connections of a, b, time relay KT adhesive makes 9 self-lockings of the 9th relay K and timing begin (regularly is 23 seconds at present embodiment), the 6th also adhesive of relay K 6 this moment, electromagnet 9 gets electric, and auxiliary catch rises, and makes the 3rd microswitch SQ3 action, 5 adhesives of the 5th relay K, safety screen puts down automatically.Time relay KT timing after about 20 seconds safety screen cover, lower position switch SQ2 action, the normally opened contact closure of this lower position switch makes the 9th relay K 9 keep self-lockings (arrive as timing in 23 seconds, also do not influence compressor operating).Along with the rising of the pressure in the welded tube (this moment, safety screen covered), the normally closed contact P2 of electro connecting pressure gauge periods of low pressure disconnects, second relay K, 2 coil losing electricities, the 3rd relay K 3 coils also discharge, the normally opened contact of the 3rd relay is converted into off-state by adhesive, and safety screen, auxiliary catch, crane dead electricity can't be moved.Pressure progresses into high pressure phase, the normally opened contact P1 closure of electro connecting pressure gauge high pressure phase, and 1 action of first relay K disconnects compressor control loop and power supply, contactor KM coil losing electricity, the 9th relay K 9 discharges compressor M1 auto stop.After pressurize a period of time, open and decontrol second operation valve 57 (manually) and unload and be depressed into below the 0.5MPa, the normally closed contact P1 of the periods of low pressure of electro connecting pressure gauge connects once more, 2 adhesives of second relay K, the also also adhesive of K3 of the 3rd relay.Because this moment, the 9th relay K 9 was stopped, a, c termination are led to, 4 adhesives of the 4th relay K, and safety screen rises automatically, and up to upper limit position switch SQ1 action, the coil losing electricity of the 4th relay K 4, safety screen stop to rise; Upper limit position switch is connected the power supply of the control loop of windlass simultaneously, makes the suspension hook of crane possess condition of work, by the 5th button SB5 or the 6th button SB6, the suspension hook of crane is worked up and down; Auxiliary catch hooks safety screen automatically simultaneously.
Number in the figure FU1, F are also, FU3 is respectively conventional fuse, FR is an electrothermal relay, the first button SB1 is used for the manual-lock compressor, the 3rd button SB3 and the 4th button SB4 are used for manually controlling the 7th relay K 7 and the 8th relay K 8, so that moving up and down of manipulating crane suspension hook, this is a routine operation, no longer describes in detail at this.

Claims (8)

1. welded tube gas pressure test device, comprise tank (1), compressor (51), the crane (33) of lifting welded tube and the draft tube (52) of operation valve is installed, escape pipe (53), wherein draft tube one end is connected in described compressor, be respectively equipped with the interface unit (54) that inserts for the welded tube port on the other end of described draft tube and described escape pipe, it is characterized in that: the safety screen (1) that is covered with the tank oral area arranged in that the oral area of described tank is side walls hinged, this safety screen is connected mutually with drag-line (43) on the windlass (41), is provided with automatic linkage simultaneously between the control loop of windlass (41) and compressor (51).
2. welded tube gas pressure test device according to claim 1, it is characterized in that: described automatic linkage comprises first relay (K1), second relay (K2) and is installed in electro connecting pressure gauge (59) on the described draft tube, the following coil for the normally closed normally closed contact (P2) and second relay of the set pressure of this electro connecting pressure gauge is in series, the coil of the normally opened contact of second relay (K2) and the 3rd relay (K3) is in series, and the normally opened contact of the 3rd relay (K3) is serially connected on the power lead of control loop of described windlass; The normally opened contact (P1) of the above action of the set pressure of described electro connecting pressure gauge is in series with the coil of first relay (K1), the normally closed contact of this first relay is serially connected on the power lead of control loop of contactor (KM) coil, and the main contacts of described contactor (KM) is serially connected in the major loop of described compressor (51).
3. welded tube gas pressure test device according to claim 2, it is characterized in that: the control loop of described crane is connected in power supply behind the normally opened contact of described the 3rd relay (K3), and described safety screen (1) is provided with upper limit position switch (SQ1) and lower position switch (SQ2), and wherein the contact of upper limit position switch (SQ1) is serially connected on the power lead of described crane control loop.
4. welded tube gas pressure test device according to claim 1 is characterized in that: also disposing the auxiliary catch (10) that hooks safety screen under the described safety screen open mode on the described column.
5. according to claim 1 or 2 or 3 or 4 described welded tube gas pressure test devices, it is characterized in that: described tank is other also to be provided with a column (31), and described column is provided with revolvable arm (32), and described crane (33) is fixed on the described arm.
6. welded tube gas pressure test device according to claim 5 is characterized in that: also be provided with fixed pulley (42) on the described column, the drag-line on the described windlass (43) lies in described safety screen (2) after walking around this fixed pulley.
7. welded tube gas pressure test device according to claim 5 is characterized in that: be separately installed with tensimeter (56,58) on described draft tube and the escape pipe.
8. according to claim 1 or 2 or 3 or 4 described welded tube gas pressure test devices, it is characterized in that: described safety screen includes in body frame that angle steel (21) is welded and the body frame reinforcement (22) that direction anyhow distributes, silk screen is fixed on described body frame and the reinforcement, and being fixed with for described drag-line (43) simultaneously on described reinforcement is the suspension ring of establishing (23).
CN2010201761543U 2010-04-27 2010-04-27 Welded pipe air pressure test device Expired - Lifetime CN201653816U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201761543U CN201653816U (en) 2010-04-27 2010-04-27 Welded pipe air pressure test device

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Application Number Priority Date Filing Date Title
CN2010201761543U CN201653816U (en) 2010-04-27 2010-04-27 Welded pipe air pressure test device

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CN201653816U true CN201653816U (en) 2010-11-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104269825A (en) * 2014-10-17 2015-01-07 国家电网公司 Transformer ultra-high voltage overvoltage insulation disconnecting link rod automatic switching device and control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104269825A (en) * 2014-10-17 2015-01-07 国家电网公司 Transformer ultra-high voltage overvoltage insulation disconnecting link rod automatic switching device and control method
CN104269825B (en) * 2014-10-17 2017-02-15 国家电网公司 Transformer ultra-high voltage overvoltage insulation disconnecting link rod automatic switching device and control method

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Granted publication date: 20101124