CN105065902A - Detection system for opening tension of tank safety valve in non-disassembly state - Google Patents
Detection system for opening tension of tank safety valve in non-disassembly state Download PDFInfo
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- CN105065902A CN105065902A CN201510482545.5A CN201510482545A CN105065902A CN 105065902 A CN105065902 A CN 105065902A CN 201510482545 A CN201510482545 A CN 201510482545A CN 105065902 A CN105065902 A CN 105065902A
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- safety valve
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- groove tank
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Abstract
The invention discloses a detection system for opening tension of a tank safety valve in a non-disassembly state. An explosion-proof sleeve, a main sleeve and a support sleeve are connected in sequence in a sealing manner. A motor is sleeved with the explosion-proof sleeve, and the motor and a coupling shaft sleeve are coaxially mounted. The coupling shaft sleeve is provided with a screw nut, and the screw nut is sleeved at the inner end of a screw to form a screw pair. A stepped shaft with a screw thread is arranged at the outer end of the screw and extends into the support sleeve, and the screw and the support sleeve are coaxially mounted. The outer end of the screw is sleeved to a connecting sleeve through the screw thread, and the connecting sleeve is sleeved to the top of the safety valve. A gas output port is formed in the side part of the main sleeve. The detection system further comprises a PC computer and a power supply module, and a tension force and the motor are connected with the PC computer through an opening detection module. The detection system can enable the tank safety valve to carry out explosion-proof opening in the non-disassembly state, realizes the detection for opening tension, and is beneficial to improving the tank detection efficiency.
Description
Technical field
The present invention relates to a kind of valve to open and detection system, especially relate to a kind of groove tank safety valve non collapsible state and open pull force calculation system.
Background technique
Along with the fast development of China's economic construction, get more and more in the items of equipment engineering with pressure management.In view of the needs of equipment pressure release, safety valve plays vital effect in proterctive equipment process.Safety valve is boiler, safety attachment important on pressurized container and other equipment that is stressed.Groove tank safety valve in tank-truck for liquefied petroleum gas or liquefied petroleum gas railway tanker is safe open-shut device, normally off is under spring-loaded, when the pressure medium in groove tank increases to over specified value, exceed the Special valve of specified value by preventing pressure medium in groove tank to discharge medium outside system.Safety valve has run important protective action to personal safety and equipment, and be absolutely necessary important safety attachment.
The groove tank of lng tanker is the one of pressurized container, by " safe technology of pressure vessel Supervision Code ", " liquid gas truck tank safety-supervision regulation " and GB150 " Steel Pressure Vessels " that SBTS promulgates, adopt the special transport vehicle of light-weight design, manufacture, be used to the special purpose vehicle of the liquid gas such as transporting propane, propylene, dimethyl ether, liquefied ammonia, methylamine, acetaldehyde.Groove tank car belongs to special equipment trade, the necessary periodic detection of National Quality Supervision Bureau General's strict regulations lng tanker;
To an important detection in the safety detection of groove tank car, be that the opening force of safety valve detects, the vitals of pressure release when it is normal operation and the superpressure ensureing groove tank.At present, the opening force of safety valve is detected and needs safety valve to disassemble, be put into the opening force that corresponding detection platform could realize safety valve and detect.Safety valve is contained on groove tank, and namely during non collapsible state, its opening force of direct-detection, still can not realize at present.And realize safety valve non collapsible state opening force direct-detection, greatly will improve detection efficiency undoubtedly, and avoid repeatedly dismantling the installation quality problem that may cause.
Summary of the invention
For realizing safety valve non collapsible state opening force direct-detection, the present invention proposes a kind of groove tank safety valve non collapsible state and opening pull force calculation system, improving detection efficiency, avoid the installation quality problem that dismounting repeatedly may cause.
The present invention adopts following technological scheme:
In groove tank top, arranged at safety valve installs described device, and described device comprises connecting sleeve, locking nut, stop sleeve, feed screw nut, leading screw, coupling band, motor, master collet and explosion-proof sleeve, and described device is connected with computer through open detection module; Explosion-proof sleeve, master collet and stop sleeve are tightly connected successively, motor to be sleeved in explosion-proof sleeve and to be fixed on master collet end, motor is by explosion-proof sleeve seal protection, coaxially installed by one end of key and coupling band after the output shaft of motor stretches into master collet, in the other end of coupling band, coaxial fixed cover is equipped with feed screw nut, feed screw nut is enclosed within leading screw the inner and forms lead screw pair, is provided with thrust-bearing between feed screw nut and stop sleeve; Leading screw outer end is screwed multidiameter shaft and extend in stop sleeve, leading screw and stop sleeve are coaxially installed, leading screw outer end thread bush is on one end of pulling force sensor, the other end thread bush of pulling force sensor is in one end of connecting sleeve, the other end thread bush of connecting sleeve is at safety valve top, and stop sleeve end face is by seal ring connection safety valve flange; Have gap between stop sleeve inwall and valve gap side face, master collet inner chamber communicates with stop sleeve inner chamber, and master collet sidepiece has the gas output interface of external gas outlet duct; Open detection module and pulling force sensor and motor and open detection model calling.
Described system also comprises PC computer and power module, and open detection module is connected to 485 turns of USB module through remote transmission line, and 485 turns of USB module connect PC computer; Power module is connected with pulling force sensor, open detection module, motor respectively powers.
Described open detection module comprises accurate amplification module, level adjustment module, low-pass filtering module, MCU processor, motor drive module and 485 driver modules; Pulling force sensor is connected with MCU processor successively after accurate amplification module, level adjustment module, low-pass filtering module, and MCU processor is through motor drive module and motor connection control, and MCU processor outputs signal through 485 driver modules.
Described MCU processor comprises CPU and is connected to the A/D module of CPU, I/O mouth and serial ports; A/D model calling low-pass filtering module, the I/O mouth of MCU is connected with motor through motor drive module, and the serial ports of MCU is connected with PC through 485 driver modules, remote transmission line, 485 turns of USB module successively.
Described open detection module is installed in explosion-proof electrification box, and motor and pulling force sensor output terminal to be picked out by the approved cable joint on explosion-proof sleeve through approved cable and be connected open detection module.
The safety valve valve gap that described safety valve comprises safety valve thrust spring, the holder of safety valve valve, safety valve connecting rod and covers at groove tank top import and export; Be fixedly connected with by safety valve connecting rod between safety valve valve gap and the holder of safety valve valve, safety valve valve restitope is in groove tank, safety valve thrust spring two ends withstand on groove tank safety valve flange inner wall and the holder of safety valve valve respectively, make safety valve valve gap be pressed on groove tank top import and export by compression thrust, the other end thread bush of described connecting sleeve is at valve gap top side face.
Between described explosion-proof sleeve and master collet, all connected by end flanges between master collet and stop sleeve, and between surface of contact, seal ring is housed, between the end face of stop sleeve and safety valve flange, seal ring is housed.
Described leading screw and connecting sleeve wall are all processed as coarse external screw thread.
Described leading screw and feed screw nut adopt ball-screw nut and ball screw.
Usefulness of the present invention is:
The present invention can realize the detection of groove tank safety valve non collapsible state being opened to pulling force, improves groove tank detection efficiency, prevents safety valve from repeatedly installing the quality problems that may cause.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of present system motion, pulling force sensor and safety valve.
Fig. 2 is the structural drawing of present system motion, pulling force sensor and safety valve.
Fig. 3 is the local structural graph of leading screw attachment portion of the present invention.
Fig. 4 is system block diagram of the present invention.
Fig. 5 is the schematic flow sheet of the invention process process.
In figure: 1: explosion-proof sleeve; 2: master collet; 3: stop sleeve; 4: groove tank relief valve assembly; 5: motor; 6: coupling band; 7: leading screw; 8: feed screw nut; 9: thrust-bearing; 10: pulling force sensor; 11: connecting sleeve; 12: safety valve valve gap; 13: safety valve flange; 14: safety valve thrust spring; 15: safety valve tightening cover; 16: safety valve lock jack panel; 17: key; 19: groove tank; 29: safety valve connecting rod.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
At groove tank 19 top safety valve 18, apparatus of the present invention are installed at place, as shown in Figure 2, device comprises connecting sleeve 11, locking nut 10, stop sleeve 3, feed screw nut 8, leading screw 7, coupling band 6, motor 5, master collet 2 and explosion-proof sleeve 1, and apparatus of the present invention are connected with computer through open detection module; Explosion-proof sleeve 1, master collet 2 and stop sleeve 3 are tightly connected successively, motor 5 to be sleeved in explosion-proof sleeve 1 and to be fixed on master collet 2 end, motor 5 is by explosion-proof sleeve 1 seal protection, as shown in Figure 3, coaxially installed by key 17 one end with coupling band 6 after the output shaft of motor 5 stretches into master collet 2, in the other end of coupling band 6, coaxial fixed cover is equipped with feed screw nut 8, and feed screw nut 8 is enclosed within leading screw 7 the inner and forms lead screw pair, is provided with thrust-bearing 9 between feed screw nut 8 and stop sleeve 3; Leading screw 7 outer end is screwed multidiameter shaft and extend in stop sleeve 3, leading screw 7 and stop sleeve 3 are coaxially installed, leading screw 7 outer end thread bush is on one end of pulling force sensor 10, the other end thread bush of pulling force sensor 10 is in one end of connecting sleeve 11, and the other end thread bush of connecting sleeve 11 is at safety valve top; Stop sleeve 3 end face is by seal ring connection safety valve flange 13; Open detection module and pulling force sensor 10 and motor 5 and open detection model calling.
As shown in Figure 4, present system also comprises PC computer and power module, and open detection module is connected to 485 turns of USB module through remote transmission line, and 485 turns of USB module connect PC computer; Power module is connected with pulling force sensor 10, open detection module, motor 5 respectively powers.
As shown in Figure 4, above-mentioned open detection module comprises accurate amplification module, level adjustment module, low-pass filtering module, MCU processor MicroControlerUnit, motor drive module and 485 driver modules; Pulling force sensor 10 is connected with MCU processor successively after accurate amplification module, level adjustment module, low-pass filtering module, and MCU processor is through motor drive module and motor 5 connection control, and MCU processor outputs signal through 485 driver modules.
As shown in Figure 4, MCU processor comprises CPU and is connected to A/D modules A nalogandDigitalconversion, I/O mouth Input/Outputinterface and the serial ports of CPU; The I/O mouth of MCU is connected with motor through motor drive module, and the serial ports of MCU is connected with PC through 485 driver modules, remote transmission line, 485 turns of USB module successively.
Open detection module is installed in explosion-proof electrification box, and motor 5 and pulling force sensor 10 output terminal to be picked out by the approved cable joint on explosion-proof sleeve 1 through approved cable and be connected open detection module.
Motor drive signal is introduced in explosion-proof sleeve 1 by approved cable and the approved cable joint be arranged on explosion-proof sleeve 1 through motor drive module by the I/O port of MCU in explosion-proof electrification box, is connected to explosion-proof stepper motor 5 and controls its start and stop and turn to.
The safety valve valve gap 12 that safety valve 18 comprises safety valve thrust spring 14, safety valve valve holder 15, safety valve connecting rod 29 and covers at groove tank 19 top import and export; Be fixedly connected with by safety valve connecting rod 29 between safety valve valve gap 12 and safety valve valve holder 15, safety valve valve holder 15 is positioned at groove tank 19, safety valve thrust spring 14 two ends withstand on groove tank 19 safety valve flange 13 inwall and safety valve valve holder 15 respectively, make safety valve valve gap 12 be pressed on groove tank 19 top import and export by compression thrust, the other end thread bush of connecting sleeve 11 is at valve gap 12 top side face.Safety valve 18 makes arranged at safety valve in normally off under spring force effect; When in groove tank 19, gas pressure is excessive, gas overcomes safety valve thrust spring 14 thrust, backs down safety valve valve gap 12.
Have gap between stop sleeve 3 inwall and valve gap 12 side face, master collet 2 inner chamber communicates with stop sleeve 3 inner chamber, and master collet 2 side has gas output interface, the external gas outlet duct of gas output interface.
Between explosion-proof sleeve 1 and master collet 2, all connected by end flanges between master collet 2 and stop sleeve 3, and between surface of contact, seal ring is housed, between the end face of stop sleeve 3 and safety valve flange 13, seal ring is housed.
Preferred leading screw 7 and connecting sleeve 11 wall are all processed as coarse external screw thread.
Preferred leading screw 7 and feed screw nut 8 adopt ball-screw nut and ball screw.
Specific embodiment of the invention working procedure is as follows:
As shown in Figure 1, apparatus of the present invention stepper motor 5 Driving Torque, by connecting shaft cover 6, feed screw nut 8 is passed in torque, feed screw nut 8 and leading screw 7 form guide screw movement pair, change into the straight line motion of leading screw 7, leading screw is connected with safety valve valve gap 12 by connecting sleeve 11, due to the existence of frictional force, leading screw 7 can be made not rotate, therefore the rotation of feed screw nut 8 is changed into the extensional motion of leading screw 7, leading screw 7 is connected with one end of pulling force sensor 10, the other end of pulling force sensor is connected with safety valve valve gap 12, therefore pulling force sensor 10 can detect the pulling force in opening process when opening safety valve, but safety valve valve gap bore can be known from the concrete intrinsic parameter of safety valve, and the unlatching pulling force of standard, by detecting the unlatching pulling force and known safety valve valve gap bore that obtain, actual safety valve can be obtained and open pulling force, thus complete unlatching pull force calculation.
As shown in Figure 5, open detection module first carries out the pretreatment of accurate amplification, level adjustment, lower pass-filter successively to the signal that pulling force sensor obtains; Its MCU to the signal that pretreatment obtains carry out successively AD conversion, AD data prediction, serial ports output signal and by 485 driver modules be converted into 485 signals export; The external 485 turns of USB module of PC realize 485 signals and change into usb signal and input to PC, simultaneously PC fulfillment database store, the process of data analysis; Power module provides power supply to pulling force sensor, open detection module and motor.
Pull force calculation process opened by safety valve, first as shown in Figure 2, before apparatus of the present invention are arranged on the valve gap 12 of groove tank safety valve and safety valve flange 13, pull force calculation system opened by no-load running safety valve in advance, and store pull force calculation data, be subsequently described device is arranged on groove tank safety valve valve gap 12 and safety valve flange 13 on, start and open pull force calculation system, its carrying out practically is as follows: MCU controls direction of motor rotation and speed by motor drive module, drive feed screw nut rotates, lead screw pair effect is utilized to be converted into pulling of leading screw, act on safety valve valve gap through pulling force sensor, safety valve valve gap is opened, simultaneously, by the pulling force signal that A/D module detection pulling force sensor collects, and it is exported by serial ports, successively through 485 driver modules, remote transmission datawire and 485 turns of USB module are transferred to PC, PC stores and detects data, testing result and no-load running data contrast by be detected completing, thus remove the impact of gravity and frictional force, obtain pull force calculation result F more accurately.Finally can obtain groove tank calibrating gas cracking pressure maximum value P according to safety valve parameter
max, groove tank calibrating gas cracking pressure maximum value P
minwith safety valve gas active area S.
If S*P
min<=F<=S*P
maxinequality is set up, then can determine that pulling force opened by this safety valve normal, otherwise this safety valve opens pulling force extremely.
Thus, the present invention completes the detection of groove tank safety valve being opened to pulling force in non collapsible state, avoid safety valve and repeatedly install the quality problems that may cause, and can improve groove tank detection efficiency, be widely used in effective detection of groove tank safety.
Finally point out, above examples of implementation are only the more representational examples of the present invention.Obviously, the invention is not restricted to above-described embodiment, a lot of aspect can also be extended to.All distortion that those of ordinary skill in the art directly derives from content disclosed by the invention or associates, all should think protection scope of the present invention.
Claims (9)
1. a groove tank safety valve non collapsible state opens pull force calculation system, it is characterized in that: described device is installed at groove tank (19) top safety valve (18) place, described device comprises connecting sleeve (11), locking nut (10), stop sleeve (3), feed screw nut (8), leading screw (7), coupling band (6), motor (5), master collet (2) and explosion-proof sleeve (1), and described device is connected with computer through open detection module, explosion-proof sleeve (1), master collet (2) and stop sleeve (3) are tightly connected successively, motor (5) to be sleeved in explosion-proof sleeve (1) and to be fixed on master collet (2) end, motor (5) is by explosion-proof sleeve (1) seal protection, the output shaft of motor (5) is stretched into master collet (2) and is coaxially installed by key (17) one end with coupling band (6) afterwards, in the other end of coupling band (6), coaxial fixed cover is equipped with feed screw nut (8), feed screw nut (8) is enclosed within leading screw (7) the inner and forms lead screw pair, thrust-bearing (9) is installed between feed screw nut (8) and stop sleeve (3), leading screw (7) outer end is screwed multidiameter shaft and extend in stop sleeve (3), leading screw (7) and stop sleeve (3) are coaxially installed, leading screw (7) outer end thread bush is on one end of pulling force sensor (10), the other end thread bush of pulling force sensor (10) is in one end of connecting sleeve (11), the other end thread bush of connecting sleeve (11) is at safety valve top, and stop sleeve (3) end face is by seal ring connection safety valve flange (13), between stop sleeve (3) inwall and valve gap (12) side face, there is gap, master collet (2) inner chamber communicates with stop sleeve (3) inner chamber, and master collet (2) sidepiece has the gas output interface of external gas outlet duct, open detection module and pulling force sensor (10) and motor (5) and open detection model calling.
2. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: described system also comprises PC computer and power module, open detection module is connected to 485 turns of USB module through remote transmission line, and 485 turns of USB module connect PC computer; Power module is connected with pulling force sensor (10), open detection module, motor (5) respectively powers.
3. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: described open detection module comprises accurate amplification module, level adjustment module, low-pass filtering module, MCU processor, motor drive module and 485 driver modules; Pulling force sensor (10) is connected with MCU processor successively after accurate amplification module, level adjustment module, low-pass filtering module, MCU processor is through motor drive module and motor (5) connection control, and MCU processor outputs signal through 485 driver modules.
4. a kind of groove tank safety valve non collapsible state according to claim 3 opens pull force calculation system, it is characterized in that: described MCU processor comprises CPU and is connected to the A/D module of CPU, I/O mouth and serial ports; A/D model calling low-pass filtering module, the I/O mouth of MCU is connected with motor through motor drive module, and the serial ports of MCU is connected with PC through 485 driver modules, remote transmission line, 485 turns of USB module successively.
5. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: described open detection module is installed in explosion-proof electrification box, motor (5) and pulling force sensor (10) output terminal to be picked out by the approved cable joint on explosion-proof sleeve (1) through approved cable and are connected open detection module.
6. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: described safety valve (18) comprises safety valve thrust spring (14), safety valve valve holder (15), safety valve connecting rod (29) and covers the safety valve valve gap (12) at groove tank (19) top import and export; Be fixedly connected with by safety valve connecting rod (29) between safety valve valve gap (12) and safety valve valve holder (15), safety valve valve holder (15) is positioned at groove tank (19), safety valve thrust spring (14) two ends withstand on groove tank (19) safety valve flange (13) inwall and safety valve valve holder (15) respectively, make safety valve valve gap (12) be pressed on groove tank (19) top import and export by compression thrust, the other end thread bush of described connecting sleeve (11) is at valve gap (12) top side face.
7. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: between described explosion-proof sleeve (1) and master collet (2), all connected by end flanges between master collet (2) and stop sleeve (3), and between surface of contact, seal ring is housed, between the end face of stop sleeve (3) and safety valve flange (13), seal ring is housed.
8. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: described leading screw (7) and connecting sleeve (11) wall are all processed as coarse external screw thread.
9. a kind of groove tank safety valve non collapsible state according to claim 1 opens pull force calculation system, it is characterized in that: described leading screw (7) and feed screw nut (8) adopt ball-screw nut and ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482545.5A CN105065902B (en) | 2015-08-07 | 2015-08-07 | Detection system for opening tension of tank safety valve in non-disassembly state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482545.5A CN105065902B (en) | 2015-08-07 | 2015-08-07 | Detection system for opening tension of tank safety valve in non-disassembly state |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105065902A true CN105065902A (en) | 2015-11-18 |
| CN105065902B CN105065902B (en) | 2017-05-03 |
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ID=54495347
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510482545.5A Active CN105065902B (en) | 2015-08-07 | 2015-08-07 | Detection system for opening tension of tank safety valve in non-disassembly state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872160A (en) * | 2017-03-10 | 2017-06-20 | 武汉市锅炉压力容器检验研究所 | One kind is without valve rod spring loaded safety valve on-line testing device |
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| NL7201436A (en) * | 1971-02-04 | 1972-08-08 | Gas cylinder valve - for high pressure ind. gas with built in safety valve | |
| WO2001007805A1 (en) * | 1999-07-22 | 2001-02-01 | Giat Industries | Safety valve for sealed chamber containing a pressurised fluid such as a lpg tank |
| CN203641605U (en) * | 2013-12-21 | 2014-06-11 | 潍坊赛马力发电设备有限公司 | Explosion-proof valve of gas engine |
| CN104806772A (en) * | 2015-04-27 | 2015-07-29 | 西峡龙成特种材料有限公司 | Self-grinding gas pipeline seal seat valve for high temperature and dust environments |
| CN204879440U (en) * | 2015-08-07 | 2015-12-16 | 中国计量学院 | Tensile testing device is opened to jar relief valve non - dismantlement state in groove |
-
2015
- 2015-08-07 CN CN201510482545.5A patent/CN105065902B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7201436A (en) * | 1971-02-04 | 1972-08-08 | Gas cylinder valve - for high pressure ind. gas with built in safety valve | |
| WO2001007805A1 (en) * | 1999-07-22 | 2001-02-01 | Giat Industries | Safety valve for sealed chamber containing a pressurised fluid such as a lpg tank |
| CN203641605U (en) * | 2013-12-21 | 2014-06-11 | 潍坊赛马力发电设备有限公司 | Explosion-proof valve of gas engine |
| CN104806772A (en) * | 2015-04-27 | 2015-07-29 | 西峡龙成特种材料有限公司 | Self-grinding gas pipeline seal seat valve for high temperature and dust environments |
| CN204879440U (en) * | 2015-08-07 | 2015-12-16 | 中国计量学院 | Tensile testing device is opened to jar relief valve non - dismantlement state in groove |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872160A (en) * | 2017-03-10 | 2017-06-20 | 武汉市锅炉压力容器检验研究所 | One kind is without valve rod spring loaded safety valve on-line testing device |
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| CN105065902B (en) | 2017-05-03 |
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