CN110823558A - Pressure testing device and method for compatible safety valve - Google Patents
Pressure testing device and method for compatible safety valve Download PDFInfo
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- CN110823558A CN110823558A CN201911205367.6A CN201911205367A CN110823558A CN 110823558 A CN110823558 A CN 110823558A CN 201911205367 A CN201911205367 A CN 201911205367A CN 110823558 A CN110823558 A CN 110823558A
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 77
- 239000003921 oil Substances 0.000 claims description 51
- 229910052757 nitrogen Inorganic materials 0.000 claims description 38
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 230000007306 turnover Effects 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims 2
- 238000007689 inspection Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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Abstract
The invention belongs to the technical field of safety valve inspection; the pressure testing device comprises a clamping system, a hydraulic system, a pneumatic system for supplying air to the safety valve and a hydraulic system for supplying water to the safety valve; the clamping system comprises a turntable which is arranged on the workbench and is provided with a hole in the center, a plurality of sliding grooves are symmetrically formed in the workbench, and the clamping jaws are sleeved in the sliding grooves through sliding rails; the upper part of the clamping jaw is provided with a pressing plate, one end of the connecting rod is connected with the lower part of the clamping jaw, and the other end of the connecting rod is connected with the turntable; the top column penetrates through the central opening, the upper end of the top column is connected with a safety valve sealing bottom plate for placing a safety valve, and the lower end of the top column is connected with an oil cylinder; the oil cylinder is connected with a hydraulic system; the safety valve sealing bottom plate is provided with sealing grooves matched with safety valves of different specifications, and the safety valves are clamped between the safety valve sealing bottom plate and the clamping jaw or the pressing plate; the invention has the beneficial effects that: the clamping device is simple, easy to adjust and suitable for valves of various specifications.
Description
Technical Field
The invention relates to the technical field of safety valve inspection, in particular to a compatible safety valve pressure inspection device and method.
Background
In the field of safety valve pressure inspection, the problem of all parties always paying attention to is that a clamping system convenient to use is arranged; the conventional clamping system for testing the pressure of the safety valve has a complex structure, cannot realize synchronous adjustment of a plurality of clamping jaws, can only clamp the safety valve to be tested in one direction, and can clamp the safety valve only by complex operation during clamping operation, and the clamping effect is poor, so that the test of various types of safety valves cannot be met; when the field clamping is realized, the safety valve clamping system is too heavy, so that the safety valve clamping system is inconvenient to move.
Disclosure of Invention
The invention provides a pressure inspection device and method for a compatible safety valve, which are used for solving the problems that the pressure inspection of safety valves with various specifications cannot be carried out in the prior art, and a traditional safety valve inspection device is not easy to move.
The invention is realized by the following technical scheme:
a pressure testing device for a compatible safety valve comprises a clamping system, a hydraulic system, a pneumatic system for supplying air to the safety valve and a hydraulic system for supplying water to the safety valve;
the clamping system comprises a turntable which is arranged on the workbench and is provided with a hole in the center, a plurality of sliding grooves are symmetrically formed in the workbench, and the clamping jaws are sleeved in the sliding grooves through sliding rails; the upper part of the clamping jaw is provided with a pressing plate, one end of the connecting rod is connected with the lower part of the clamping jaw, and the other end of the connecting rod is connected with the turntable; the top column penetrates through the central opening, the upper end of the top column is connected with a safety valve sealing bottom plate for placing a safety valve, and the lower end of the top column is connected with an oil cylinder; the oil cylinder is connected with a hydraulic system; the safety valve sealing bottom plate is provided with sealing grooves matched with safety valves of different specifications, and the safety valves are clamped between the safety valve sealing bottom plate and the clamping jaw or the pressing plate;
the hydraulic system comprises an oil pump connected with the oil cylinder through a hydraulic pipeline, and an oil pump pressure regulating valve is arranged on the hydraulic pipeline;
the air pressure system comprises an air compressor, an air bottle and a booster pump which are respectively connected with the nitrogen making machine, an air pressure stop valve is also arranged on a pipeline connected with the nitrogen making machine, and the nitrogen is stored in the air bottle when the concentration of the nitrogen reaches a second preset concentration;
the water pressure system is connected with the water tank and the water pump through water pipes, the water pump is also connected with the booster pump through a booster pipeline, and the outlet of the water pump is connected with the safety valve through a water pipe; and a water pressure stop valve and a water pump controller ball valve are arranged on the water pipe.
Furthermore, a turntable handle is further arranged on the turntable, when the turntable handle pushes the turntable to rotate, the clamping jaw is driven by the connecting rod to slide along the sliding groove, and the pressure plate is close to or far away from the safety valve sealing bottom plate and the safety valve arranged on the safety valve sealing bottom plate;
the oil cylinder is fixed on the auxiliary platform through the joint mounting plate, and a driving shaft of the oil cylinder upwards penetrates through the central through hole and extends to the workbench.
Furthermore, the oil cylinder is arranged on an auxiliary platform positioned in the middle of the workbench bracket and connected with the oil pump through a hose, and the tail end of the hose is provided with a quick connector;
the bottom of the workbench bracket is provided with a caster and a foldable supporting part, and the supporting part and the caster are equal in height.
The clamping system comprises a clamping system, a clamping device and a clamping device, wherein the clamping system comprises a clamping device and a clamping device, the clamping device comprises a clamping device, a clamping device and a clamping device, the clamping device comprises a clamping system and a clamping device, the clamping device is arranged on the clamping system, the clamping device is arranged on;
at least one piece of glass for observation is nested on the side wall of the shield, and a lifting handle for lifting the shield is arranged on one side of the glass;
the side wall of the protective cover is provided with a turnover door for opening the protective cover, and the turnover door and the side wall of the protective cover can be connected in an opening and closing manner.
Further, when the clamping system is used for clamping, the safety valve to be detected is placed on a sealing groove of a safety valve sealing bottom plate, which is matched with the safety valve sealing bottom plate, the turntable handle is rotated, and the clamping jaw moves towards the center of the workbench through the turntable and the connecting rod to clamp the safety valve in the circumferential direction;
if the safety valve to be clamped is in a small specification, the pressure plate is continuously adjusted to move towards the center of the workbench to circumferentially clamp the safety valve after the clamping of the clamping jaw is adjusted;
after circumferential clamping is completed, the output shaft of the oil cylinder extends upwards to drive the safety valve sealing bottom plate and the safety valve to be lifted to be abutted against the pressing plate, and longitudinal compression of the safety valve is carried out;
after circumferential clamping and longitudinal pressing are finished, carrying out pressure detection on the pressed safety valve;
when the clamping jaw is disassembled after detection, the oil cylinder retracts, the pressing plate is separated from the safety valve, meanwhile, the turntable handle is rotated reversely, the outer side of the clamping jaw workbench moves, the safety valve is taken down, and the safety valve is disassembled from the clamping system.
Further, the method comprises the steps of air pressure testing and water pressure testing;
the air pressure test comprises the following steps:
s1: starting the nitrogen making machine to a preset time, starting the air compressor, and starting the ball valve to send compressed air to the nitrogen making machine when the pressure generated by the air compressor is greater than the preset pressure; then when the concentration of the nitrogen in the nitrogen making machine reaches a first preset concentration, starting the booster pump and simultaneously opening the air pressure stop valve, and stopping the nitrogen making by the nitrogen making machine until the concentration of the nitrogen reaches a second preset concentration;
s2: storing nitrogen gas reaching a second preset concentration in the nitrogen making machine into the gas cylinder, confirming that all pipelines and joints are connected, installing a safety valve to be tested on the clamping system, and confirming that enough hydraulic oil is in the hydraulic oil cylinder;
s3: then opening an oil pump control ball valve, adjusting an oil pump pressure regulating valve, and clamping the safety valve to be tested according to the clamping force of the clamping system and the pressure of the oil pump pressure regulating valve;
s4: adjusting an air pressure regulating valve to the required test pressure according to the clamping pressure of the clamping system, and starting an air pressure test;
the test of the water pressure of the safety valve comprises the following steps:
s5: after the air pressure test is finished, the liquid level height in the water tank is confirmed; then the water pressure stop valve and the ball valve of the water pump controller are opened, and the booster pump is adjusted to drive the air pressure regulating valve to start the water pressure test.
Further, the first predetermined concentration is 0-10MPA and the second predetermined concentration is 10-20 MPA.
Further, the clamping by the clamping system comprises the following steps: the safety valve to be detected is placed on the safety valve sealing bottom plate and matched with the safety valve sealing bottom plate, the turntable handle is rotated, and the clamping jaw moves towards the center of the workbench through the turntable and the connecting rod to clamp the safety valve in the circumferential direction;
if the safety valve to be clamped is too small, the pressure plate is continuously adjusted to move towards the center of the workbench to clamp the safety valve in the circumferential direction after the clamping jaw is adjusted to clamp the safety valve;
after circumferential clamping is completed, the output shaft of the oil cylinder extends upwards to drive the safety valve sealing bottom plate and the safety valve to be lifted to be abutted against the pressing plate, and longitudinal compression of the safety valve is carried out;
after circumferential clamping and longitudinal pressing are finished, carrying out pressure detection on the pressed safety valve;
when the safety valve is disassembled after detection, the oil cylinder retracts, the pressing plate and the safety valve are separated from each other, the turntable handle is rotated reversely, the clamping jaw moves towards the outer side of the workbench, the safety valve is taken down, and the safety valve is disassembled from the clamping system.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the sealing grooves matched with safety valves of different specifications are formed in the safety valve sealing bottom plate, so that the safety valves of different specifications can be clamped by a clamping system, the clamping jaw is arranged in the sliding groove in a matching manner and can move along the sliding groove, the distance between the clamping jaw and the central safety valve sealing bottom plate can be effectively adjusted, the pressing plate penetrating through the upper part of the clamping jaw can be fixed on a flange of the safety valve when the safety valve is clamped, and the pressing plate is pushed upwards through the oil cylinder at the bottom, so that the transverse and longitudinal angles of the safety valve are clamped, and the clamping device is simple and easy to adjust and is suitable for valves of various specifications; and the safety valve inspection device is light in weight and convenient to move.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a schematic view of a clamping system of the present invention;
FIG. 6 is a schematic structural view of a clamping flange of the present invention;
FIG. 7 is a partial cross-sectional view of the clamping system of the present invention;
FIG. 8 is a top view of FIG. 5;
FIG. 9 is a flow chart of the water pressure test according to the present invention;
FIG. 10 is a flow chart of the air pressure test according to the present invention.
In the figure: 1-safety valve sealing bottom plate; 2, positioning a plate; 3, rotating the disc; 4-a workbench; 5-a connecting rod; 6-rotating disc shaft; 7-a safety valve; 8-a caster wheel; 9-a table support; 10-a joint mounting plate; 11-a turntable handle; 12-a hoisting ring; 13-a shield assembly; 14-oil cylinder; 15-propping; 16-a hasp; 17-opening the door; 18-a jaw; 19-pressing plate; 20-nitrogen making machine; 21-nitrogen compressor; 22-a first air compressor; 23-a first gas cylinder; 24-a second air compressor; 25-a second gas cylinder; 26-a clamping system; 27-a control cabinet; 28-retractable computer support placing table.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to FIGS. 1-10; a pressure testing device for a compatible safety valve comprises a clamping system, a hydraulic system, a pneumatic system for supplying air to the safety valve and a hydraulic system for supplying water to the safety valve;
the clamping system comprises a turntable 3 which is arranged on a workbench 4 and is provided with a hole in the center, a plurality of sliding grooves are symmetrically formed in the workbench 4, and clamping jaws 18 are sleeved in the sliding grooves through sliding rails; a pressing plate 19 is arranged at the upper part of the clamping jaw 18, one end of the connecting rod 5 is connected with the lower part of the clamping jaw 18, and the other end is connected with the rotary table 3; the top column 15 passes through the central opening, the upper end of the top column is connected with a safety valve sealing bottom plate 1 for placing a safety valve, and the lower end of the top column is connected with the oil cylinder 14; the oil cylinder 14 is connected with a hydraulic system; the safety valve sealing bottom plate 1 is provided with sealing grooves matched with safety valves of different specifications, and the safety valves are clamped between the safety valve sealing bottom plate 1 and the clamping jaw 18 or the pressing plate 19;
the hydraulic system comprises an oil pump connected with the oil cylinder 14 through a hydraulic pipeline, and the hydraulic pipeline is provided with an oil pump pressure regulating valve;
the air pressure system comprises an air compressor, an air bottle and a booster pump which are respectively connected with the nitrogen making machine 20, an air pressure stop valve is also arranged on a pipeline connected with the nitrogen making machine 20, and the nitrogen is stored in the air bottle when the concentration of the nitrogen reaches a second preset concentration;
the water pressure system is connected with the water tank and the water pump through water pipes, the water pump is also connected with the booster pump through a booster pipeline, and the outlet of the water pump is connected with the safety valve through a water pipe; the water pipe is provided with a water pressure stop valve and a water pump controller ball valve.
According to the invention, the sealing grooves matched with safety valves of different specifications are formed in the safety valve sealing bottom plate, so that the safety valves of different specifications can be clamped by a clamping system, the clamping jaw is arranged in the sliding groove in a matching manner and can move along the sliding groove, the distance between the clamping jaw and the central safety valve sealing bottom plate can be effectively adjusted, the pressing plate penetrating through the upper part of the clamping jaw can be fixed on a flange of the safety valve when the safety valve is clamped, and the pressing plate is pushed upwards through the oil cylinder at the bottom, so that the transverse and longitudinal angles of the safety valve are clamped, and the clamping device is simple and easy to adjust and is suitable for valves of various specifications; and the safety valve inspection device is light in weight and convenient to move.
The turntable 3 is also provided with a turntable handle 11, when the turntable handle 11 pushes the turntable 3 to rotate, the clamping jaw 18 is driven by the connecting rod 5 to slide along the sliding groove, and the pressure plate 19 is close to or far away from the safety valve sealing bottom plate 1 and a safety valve arranged on the safety valve sealing bottom plate; the turnplate handle 11 is arranged to drive the turnplate 3 to rotate in a very portable way, and the operation is portable and simple.
The cylinder 14 is fixed to the auxiliary platform by means of the joint mounting plate 10, and the drive shaft of the cylinder 14 extends upwardly through the central through hole to the table 4. The auxiliary platform is convenient for installing the oil cylinder 14, so that the stability of the oil cylinder 14 is improved.
The oil cylinder 14 is arranged on an auxiliary platform positioned in the middle of the workbench bracket and is connected with the oil pump through a hose, and the tail end of the hose is provided with a quick connector; in order to facilitate connection with other components, a quick joint is arranged at the tail end of the hose, and the expansibility of the device is improved.
The bottom of workstation support is equipped with truckle and folding supporting part, the supporting part with the height of truckle equal, this supporting part and truckle set up the mobility that has promoted detection device on the one hand, on the other hand supporting part has played the effect of supplementary support, has promoted the crushing resistance of truckle.
The clamping device further comprises a shield 13 arranged on the clamping system, two ends of the shield 13 are open, and the cross section of the shield 13 is polygonal; the arrangement of the shield 13 facilitates the covering of the clamping system and avoids damage to the clamping system due to other reasons.
At least one piece of glass for observation is nested on the side wall of the shield 13, and a lifting handle for lifting the shield 13 is arranged on one side of the glass; to facilitate opening of the shield 13, a carrying handle is provided on the shield 13, which increases the portability of opening the shield 13.
The side wall of the protective cover 13 is provided with a flip door for opening the protective cover 13, the flip door and the side wall of the protective cover 13 can be connected in an openable and closable manner, and the flip door is arranged to be conveniently opened at one side of the protective cover 13.
When the clamping system is used for clamping, the safety valve 7 to be detected is placed on a sealing groove matched with the safety valve sealing bottom plate 1 of the safety valve, the turntable handle 11 is rotated, and the clamping jaw 18 moves towards the center of the workbench through the turntable 3 and the connecting rod 5 to clamp the safety valve in the circumferential direction;
if the safety valve 7 to be clamped is in a small specification, after the clamping of the clamping jaw 18 is adjusted, the pressing plate 19 is continuously adjusted to move towards the center of the workbench to circumferentially clamp the safety valve;
after the circumferential clamping is finished, the output shaft of the oil cylinder 14 extends upwards to drive the safety valve sealing bottom plate 1 and the safety valve 7 to be lifted to be abutted against the pressure plate 19, and the safety valve 7 is longitudinally pressed;
after the circumferential clamping and the longitudinal pressing are finished, carrying out pressure detection on the pressed safety valve 7;
when the safety valve 7 is detached after detection is finished, the oil cylinder 14 retracts, the pressure plate 19 is separated from the safety valve 7, the turntable handle 11 is rotated reversely, the clamping jaw 18 moves outside the workbench, the safety valve 7 is detached, and the safety valve 7 is detached from the clamping system.
The method comprises the following steps of (1) testing air pressure and water pressure; the air pressure test comprises the following steps:
s1: starting the nitrogen making machine 20 to a preset time, starting the air compressor, and starting the ball valve to send compressed air to the nitrogen making machine 20 when the pressure generated by the air compressor is greater than the preset pressure; then when the concentration of the nitrogen in the nitrogen making machine 20 reaches a first preset concentration, the booster pump is started and the air pressure stop valve is opened at the same time, and the nitrogen making machine 20 stops making nitrogen until the concentration of the nitrogen reaches a second preset concentration;
s2: storing nitrogen gas reaching a second preset concentration in the nitrogen making machine 20 into the gas cylinder, confirming that all pipelines and joints are connected, installing a safety valve to be tested on the clamping system 26, and confirming that enough hydraulic oil exists in the hydraulic oil cylinder;
s3: then, opening an oil pump control ball valve, adjusting an oil pump pressure regulating valve, and clamping the safety valve to be tested according to the clamping force of the clamping system 26 and the pressure of the oil pump pressure regulating valve;
s4: adjusting the air pressure regulating valve to the required test pressure according to the clamping pressure of the clamping system 26, and starting the air pressure test; the test of the water pressure of the safety valve comprises the following steps:
s5: after the air pressure test is finished, the liquid level height in the water tank is confirmed; then the water pressure stop valve and the ball valve of the water pump controller are opened, and the booster pump is adjusted to drive the air pressure regulating valve to start the water pressure test.
The first predetermined concentration is 0-10MPA and the second predetermined concentration is 10-20 MPA.
The clamping by the clamping system comprises the following steps: the safety valve 7 to be detected is placed on the safety valve sealing bottom plate 1 and matched with the safety valve sealing bottom plate, the turntable handle 11 is rotated, and the clamping jaw 18 moves towards the center of the workbench through the turntable 3 and the connecting rod 5 to clamp the safety valve in the circumferential direction;
if the safety valve 7 to be clamped is too small, the pressure plate 19 is continuously adjusted to move towards the center of the workbench to clamp the safety valve in the circumferential direction after the clamping of the clamping jaw 18 is adjusted;
after the circumferential clamping is finished, the output shaft of the oil cylinder 14 extends upwards to drive the safety valve sealing bottom plate 1 and the safety valve 7 to be lifted to be abutted against the pressure plate 19, and the safety valve 7 is longitudinally pressed;
after the circumferential clamping and the longitudinal pressing are finished, carrying out pressure detection on the pressed safety valve 7;
when the safety valve 7 is detached after detection is finished, the oil cylinder 14 retracts, the pressure plate 19 is separated from the safety valve 7, the turntable handle 11 is rotated reversely, the clamping jaw 18 moves outside the workbench, the safety valve 7 is detached, and the safety valve 7 is detached from the clamping system.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. A compatible safety valve pressure testing device is characterized in that: comprises a clamping system, a hydraulic system, a pneumatic system for supplying air to a safety valve and a hydraulic system for supplying water;
the clamping system comprises a turntable (3) which is arranged on the workbench (4) and provided with a hole in the center, a plurality of sliding grooves are symmetrically formed in the workbench (4), and the clamping jaws (18) are sleeved in the sliding grooves through sliding rails; a pressing plate (19) is arranged at the upper part of the clamping jaw (18), one end of the connecting rod (5) is connected with the lower part of the clamping jaw (18), and the other end of the connecting rod is connected with the turntable (3); the top column (15) penetrates through the central opening, the upper end of the top column is connected with a safety valve sealing bottom plate (1) for placing a safety valve, and the lower end of the top column is connected with an oil cylinder (14); the oil cylinder (14) is connected with a hydraulic system; the safety valve sealing bottom plate (1) is provided with sealing grooves matched with safety valves of different specifications, and the safety valves are clamped between the safety valve sealing bottom plate (1) and the clamping jaw (18) or the pressing plate (19);
the hydraulic system comprises an oil pump connected with the oil cylinder (14) through a hydraulic pipeline, and the hydraulic pipeline is provided with an oil pump pressure regulating valve;
the air pressure system comprises an air compressor, an air cylinder and a booster pump which are respectively connected with the nitrogen making machine (20), an air pressure stop valve is also arranged on a pipeline connected with the nitrogen making machine (20), and nitrogen is stored in the air cylinder when the concentration of the nitrogen reaches a second preset concentration;
the water pressure system is connected with the water tank and the water pump through water pipes, the water pump is also connected with the booster pump through a booster pipeline, and the outlet of the water pump is connected with the safety valve through a water pipe; and a water pressure stop valve and a water pump controller ball valve are arranged on the water pipe.
2. The compatible safety valve pressure testing device according to claim 1, wherein: the rotary table (3) is also provided with a rotary table handle (11), when the rotary table handle (11) pushes the rotary table (3) to rotate, the clamping jaw (18) is driven by the connecting rod (5) to slide along the sliding groove, and the pressing plate (19) is close to or far away from the safety valve sealing bottom plate (1) and a safety valve arranged on the safety valve sealing bottom plate;
the oil cylinder (14) is fixed on the auxiliary platform through the joint mounting plate (10), and a driving shaft of the oil cylinder (14) upwards penetrates through the central through hole and extends to the workbench (4).
3. The compatible safety valve pressure testing device according to claim 1, wherein: the oil cylinder (14) is arranged on an auxiliary platform positioned in the middle of the workbench bracket and is connected with the oil pump through a hose, and the tail end of the hose is provided with a quick connector;
the bottom of the workbench bracket is provided with a caster and a foldable supporting part, and the supporting part and the caster are equal in height.
4. The compatible safety valve pressure testing device according to claim 1, wherein: the clamping device further comprises a shield (13) arranged on the clamping system, wherein two ends of the shield (13) are open, and the cross section of the shield is polygonal;
at least one piece of glass for observation is nested on the side wall of the shield (13), and a lifting handle for lifting the shield (13) is arranged on one side of the glass;
the side wall of the protective cover (13) is provided with a turnover door for opening the protective cover (13), and the turnover door and the side wall of the protective cover (13) can be connected in an opening and closing manner.
5. The compatible safety valve pressure testing device according to claim 1, wherein: when the clamping system is used for clamping, the safety valve (7) to be detected is placed on a sealing groove, matched with the sealing bottom plate (1), of the safety valve, a rotary table handle (11) is rotated, and a clamping jaw (18) moves towards the center of a workbench through a rotary table (3) and a connecting rod (5) to clamp the safety valve in the circumferential direction;
if the safety valve (7) to be clamped is in a small specification, after the clamping of the clamping jaw (18) is adjusted, the pressing plate (19) is continuously adjusted to move towards the center of the workbench to clamp the safety valve in the circumferential direction;
after circumferential clamping is finished, the output shaft of the oil cylinder (14) extends upwards to drive the safety valve sealing bottom plate (1) and the safety valve (7) to be lifted to be abutted against the pressure plate (19) so as to longitudinally compress the safety valve (7);
after the circumferential clamping and the longitudinal pressing are finished, carrying out pressure detection on the pressed safety valve (7);
when the safety valve (7) is dismounted after detection is finished, the oil cylinder (14) retracts, the pressing plate (19) is separated from the safety valve (7), the rotary table handle (11) is rotated reversely, the clamping jaw (18) moves outside the workbench, the safety valve (7) is taken down, and the safety valve (7) is dismounted from the clamping system.
6. A pressure testing method for a compatible safety valve is characterized by comprising the following steps: the method comprises the following steps of (1) testing air pressure and water pressure;
the air pressure test comprises the following steps:
s1: starting the nitrogen making machine (20) to a preset time, starting the air compressor, and starting the ball valve to send compressed air to the nitrogen making machine (20) when the pressure generated by the air compressor is greater than the preset pressure; then when the concentration of the nitrogen in the nitrogen making machine (20) reaches a first preset concentration, the booster pump is started and the air pressure stop valve is opened at the same time, and the nitrogen making machine (20) stops making nitrogen until the concentration of the nitrogen reaches a second preset concentration;
s2: storing nitrogen gas reaching a second preset concentration in the nitrogen making machine (20) into the gas cylinder, confirming that all pipelines and joints are connected, installing a safety valve to be tested on the clamping system (26), and confirming that enough hydraulic oil is in the hydraulic oil cylinder;
s3: then, an oil pump control ball valve is opened, an oil pump pressure regulating valve is regulated, and the safety valve to be tested is clamped according to the clamping force of the clamping system (26) and the pressure of the oil pump pressure regulating valve;
s4: adjusting the air pressure regulating valve to the required test pressure according to the clamping pressure of the clamping system (26) and starting the air pressure test;
the test of the water pressure of the safety valve comprises the following steps:
s5): after the air pressure test is finished, the liquid level height in the water tank is confirmed; then the water pressure stop valve and the ball valve of the water pump controller are opened, and the booster pump is adjusted to drive the air pressure regulating valve to start the water pressure test.
7. The compatible safety valve pressure verification method according to claim 6, characterized in that: the first predetermined concentration is 0-10MPA and the second predetermined concentration is 10-20 MPA.
8. The compatible safety valve pressure verification method according to claim 6, characterized in that: the clamping by the clamping system comprises the following steps: the safety valve (7) to be detected is placed on the safety valve sealing bottom plate (1) and matched with the safety valve sealing bottom plate, a turntable handle (11) is rotated, and a clamping jaw (18) moves towards the center of a workbench through a turntable (3) and a connecting rod (5) to clamp the safety valve in the circumferential direction;
if the safety valve (7) to be clamped is too small, the adjusting clamping jaw (18) is used for clamping, and then the pressing plate (19) is continuously adjusted to move towards the center of the workbench to clamp the safety valve in the circumferential direction;
after circumferential clamping is finished, the output shaft of the oil cylinder (14) extends upwards to drive the safety valve sealing bottom plate (1) and the safety valve (7) to be lifted to be abutted against the pressure plate (19) so as to longitudinally compress the safety valve (7);
after the circumferential clamping and the longitudinal pressing are finished, carrying out pressure detection on the pressed safety valve (7);
when the safety valve (7) is dismounted after detection is finished, the oil cylinder (14) retracts, the pressing plate (19) is separated from the safety valve (7), the rotary table handle (11) is rotated reversely, the clamping jaw (18) moves outside the workbench, the safety valve (7) is taken down, and the safety valve (7) is dismounted from the clamping system.
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| CN201911205367.6A CN110823558A (en) | 2019-11-29 | 2019-11-29 | Pressure testing device and method for compatible safety valve |
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| CN111735688A (en) * | 2020-06-15 | 2020-10-02 | 纪玉东 | Mounting structure and test equipment of water pressure test equipment for building construction |
| CN111964640A (en) * | 2020-08-15 | 2020-11-20 | 海南海玻工程玻璃有限公司 | Glass detection device |
| CN113866000A (en) * | 2021-09-24 | 2021-12-31 | 上海技涵电子科技有限公司 | Measuring device compatible with water pressure and air tightness tests |
| CN114235385A (en) * | 2022-01-19 | 2022-03-25 | 浙江嘉隆机械设备有限公司 | Multifunctional valve comprehensive test bench and safety valve test method |
| CN114264470A (en) * | 2021-12-07 | 2022-04-01 | 西安精密机械研究所 | Device and method for detecting opening and closing pressure of safety valve under high back pressure |
| CN116735385A (en) * | 2023-08-11 | 2023-09-12 | 陶瓷工业设计研究院(福建)有限公司 | Ceramic product strength detection device and detection method thereof |
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Effective date of registration: 20201014 Address after: 100120 Beijing Xicheng District six laying Kang Applicant after: CHINA NATIONAL PETROLEUM Corp. Address before: 710018 Building 1, Xi'an Liren Technology Co., Ltd., southeast corner of the intersection of Fenghe road and Mingguang Road, north side of Fengcheng Second Road, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Applicant before: TECHNOLOGY MONITORING CENTER OF CHANGQING PETROLEUM EXPLORATION BUREAU Co.,Ltd. |