CN2639869Y - Electric pressure checking table - Google Patents
Electric pressure checking table Download PDFInfo
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- CN2639869Y CN2639869Y CN 03265445 CN03265445U CN2639869Y CN 2639869 Y CN2639869 Y CN 2639869Y CN 03265445 CN03265445 CN 03265445 CN 03265445 U CN03265445 U CN 03265445U CN 2639869 Y CN2639869 Y CN 2639869Y
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Abstract
The utility model relates to an electric pressure verifying table with hydraulic pressure, air pressure and vacuum verifying functions, which comprises an electric pressure producing device, a pressure control device connected with the electric pressure producing device, a verifying device connected with the pressure control device through an output terminal as well as an electric pressure-limiting device which controls the on/off of the power supply by a setting pressure value; wherein, the electric pressure producing device comprises a pneumatic pump, a vacuum pump and a hydraulic pump which are connected with the power supply and connected in parallel with each other; the pneumatic pump, the vacuum pump and the hydraulic pump are connected with an air pressure storage tank, a vacuum storage tank and an oil storage tank respectively; the air pressure control device, the vacuum pressure control device and the hydraulic pressure control device are used for controlling the air pressure, vacuum pressure and the hydraulic pressure; the verifying device comprises an air pressure standard meter, a vacuum standard meter and a hydraulic pressure standard meter. The utility model can verify the hydraulic pressure, air pressure and vacuum pressure both independently and simultaneously, so that all systems are well sealed, without mutual pollution and mutual interference.
Description
Technical field
The utility model relates to a kind of pressure checking device, particularly a kind of detection and calibrating installation that is used for the instrument of measurement gas, liquid and vacuum pressure.
Background technology
Though existing pressure checking device has multiple verifying function, can verification hydraulic pressure, air pressure and vacuum pressure, the following problem of ubiquity: it is little to make the pressure scope, hydraulic pressure≤60Mpa, air pressure 0-1Mpa; It is long to make the pressure time, be pressurized to the maximal value required time be respectively air pressure greater than 2 minutes, hydraulic pressure greater than 2 minutes; Noise is big; Weight all more than 100kg, compares heavy; The pressure control mode is all to adopt the pressure regulation of bivalve open type, therefore makes the pressure regulation difficulty; It is poor to seal, and all has serious seepage phenomenon when pressure reaches 60Mpa when making; Because its hydraulic system, baric systerm are cross-linked with each other, therefore the gentle voltage-controlled pressure of hydraulic pressure can not be operated simultaneously and hydraulic pressure and baric systerm are polluted mutually, in addition, air pressure also exists crosslinked and mutual interference mutually with the vacuum pressure control.
Novel content
The utility model purpose is to provide a kind of electric press checking table with hydraulic pressure, air pressure and three kinds of verifying functions of vacuum, not only can be independently but also the hydraulic pressure of verification simultaneously, air pressure and vacuum pressure, make that each system sealing is good, and do not pollute mutually between the system and interfere with each other.
For realizing that the utility model above-mentioned purpose provides a kind of electric press checking table that is used for verification hydraulic pressure, air pressure and vacuum pressure, comprise electronic make pressure device, with electronic pressure control device that pressure device links to each other and the school survey device that links to each other with pressure control device by out splice going splice made.The electronic pressure device of making comprises with power supply and linking to each other and air lift pump, vacuum pump and hydraulic pump parallel with one another that air lift pump, vacuum pump and hydraulic pump are connected air pressure gas-holder, vacuum air storage tank and storage tank respectively; Pressure control device comprises the air pressure pressure control device that links to each other with the air pressure gas-holder, the vacuum pressure control device that links to each other with vacuum air storage tank and the hydraulic pressure pressure control device that links to each other with storage tank; The school is surveyed device and is comprised air pressure standard scale, vacuum standard table and the hydraulic pressure standard scale that links to each other with air pressure pressure control device, vacuum pressure control device and hydraulic pressure pressure control device respectively.Comprise respectively three electronics pressure limiting devices that link to each other with the gentle voltage-controlled pressure device of air lift pump, link to each other, link to each other with the hydraulic pressure pressure control device with hydraulic pump in addition with vacuum pump.
The air pressure pressure control device comprises and the tank connected air pressure valve of air pressure gas storage that the air pressure micrometering valve, the air pressure that are connected with air pressure valve return the inspection valve, and the atmospheric pressure pressure limiting and the indicator gauge that are connected with the air pressure micrometering valve; The vacuum pressure control device comprises vacuum valve, the vacuum pressure indicator gauge that is connected with vacuum air storage tank, and the vacuum micrometering valve, the vacuum that are connected with vacuum valve are returned the inspection valve, and the vacuum pressure indicator gauge that is connected with the vacuum micrometering valve; The hydraulic pressure pressure control device comprises and the tank connected hydraulic valve of oil storage that the hydraulic pressure micrometering valve, the hydraulic pressure that are connected with hydraulic valve return the inspection valve, and the hydraulic pressure pressure limiting and the indicator gauge that are connected with the hydraulic pressure micrometering valve.
Hydraulic pump comprises eccentric wheel and the plunger body that is installed on the motor shaft in addition, institute eccentric wheel outside is with rolling bearing, described plunger body comprises plunger, plunger bushing, is enclosed within the plunger matching parts and the overcoat of plunger bushing outside, plunger one end is provided with the spring bearer plate that contacts with the rolling bearing excircle, spring one end that is enclosed within on the plunger bushing leans against on the described spring bearer plate, the other end leans against on the described plunger matching parts, and described overcoat is connected with delivery connection.
Be provided with the Dan Pingdan awl awl pad that is used to seal between plug sleeve and the overcoat, described overcoat one end inserts in the inner groovy of described delivery connection and by macropore bicone awl pad and leans against the inner groovy bottom.
Hermetically-sealed construction in the hydraulic pressure micrometering valve adopts the sealed letter structure, is included in and stacks support ring, V-ring, high pressure pressure ring and pressure pad on the micrometering valve valve rod successively.
The xsect profile of V-ring is the V groove with the outside and inboard, and the dual-side in the outside forms upper angle β, and inboard dual-side forms lower angle α.For low pressure, described lower angle α is 50 °, and described upper angle β is 60 °; For high pressure, described lower angle α is 90 °, and described upper angle β is 100 °.
This electronics pressure limiting device is a solid-state relay.
The advantage of the utility model electric press checking table is, it is big to make the pressure scope, and hydraulic pump is made pressure and can be reached more than the 100Mpa, and air lift pump is made pressure and can be reached more than the 1.8Mpa; The noise that produces in the use is low, and the noise that hydraulic pump and air lift pump produce is lower than 53dB and 50dB respectively; Because adopt one dimension to transfer, pressure control is convenient, pressure is very fast just can to reach stable, be pressurized to the maximal value required time be respectively air pressure less than 1 minute, hydraulic pressure less than 1.5 minutes, vacuum was less than 1 minute; Simple in structure, reduce volume and reduced weight; Precision height, the degree of stability of hydraulic pressure, air pressure can reach 0.05%FS/3 more than second, and the degree of stability of vacuum can reach 0.1%FS/3 second; Because adopt multinomial comprehensive sealing measure, good airproof performance does not leak when pressure reaches 100Mpa yet; By the electronics pressure limiting, make pressure limiting easy and simple to handle, quick and reliable; Because hydraulic pressure, air pressure and the vacuum system loop of adopting are independent mutually, so they not only can work independently but also can work simultaneously, and can not pollute mutually and mutual interference mutually.
Because hydraulic pump has adopted the rolling bearing eccentric stiffener, and sliding friction of the prior art is become rolling friction, therefore, makes friction factor become hundred times of ground to reduce, and has significantly reduced noise.Plunger rod in the hydraulic pump is protected by slide block, the generation of the phenomenon of therefore having avoided fractureing, the serviceable life of having improved hydraulic pump.
The comprehensive sealing measure of adopting in the hydraulic system comprises accurate envelope and motive seal.Adopted the awl pad in the wherein accurate envelope, form the elastic-plastic deformation bonding state between awl pad and the parts that are in contact with it, firmly little during assembling like such elastic-plastic deformation bonding state, but be easy to form sealing to high pressure, when pressure reaches 160Mpa, there is not oil impregnate; Adopted the sealed letter form in the motive seal, V-ring wherein and pressure ring material selection teflon also have special shape, moving down by pressure pad during assembling forces V-ring and pressure ring angle to become big, internal diameter diminishes the external diameter change greatly, make V ring and pressure ring in encircle tight valve rod, outer shroud stretching sealed letter outer wall forms the predeformation sealing.When pressure increased gradually, under the effect of pressure, the distortion of V-ring and pressure ring was increased and strengthened gradually with pressure, makes the valve rod place to rotate, and can seal again, and is according to experimental data, when pressure reaches 120Mpa～160Mpa, still oil-tight at the valve rod place.
Below in conjunction with accompanying drawing the utility model electric press checking table is elaborated, wherein identical parts adopt same numeral in each accompanying drawing.
Description of drawings
Fig. 1 is the fundamental diagram of the utility model electric press checking table;
Fig. 2 is the cut-open view of the hydraulic pump that uses in the utility model electric press checking table;
Fig. 3 a, 3b and 3c are the cut-open views that is used for three kinds of awl pads of static seal in the hydraulic pump shown in Figure 2;
Fig. 4 is the cut-open view that returns the inspection valve that uses in the utility model electric press checking table;
Fig. 5 a, 5b and 5c are respectively the axial cut-open views of support ring, V-ring and high pressure pressure ring in the hydraulic pressure micrometering valve motive seal letter structure;
Fig. 6 is the cut-open view of the micrometering valve of hydraulic system in the utility model electric press checking table.
Description of reference numerals: electropneumatic pump 100; Air pressure shows and pressure limiting table 101; Air pressure shows and pressure limiting table contact 101a, 101b; Air pressure gas-holder 102; Atmospheric pressure sensor 103; Air pressure valve 104; Air pressure returns inspection valve 105; Air pressure micrometering valve 106; Air pressure power knob 107; Air pressure out splice going splice 108; Air pressure standard scale 109; Air pressure calibrated meter 110; Solid-state relay 111; Direct supply 112; Supply voltage shows 113; Socket 114; Plug 115; Pilot lamp 116; Electric vacuum pump 200; Vacuum pressure indicator gauge 201; Vacuum air storage tank 202; Vacuum valve 204; Vacuum is returned inspection valve 205; Vacuum micrometering valve 206; Vacuum power knob 207; Vacuum out splice going splice 208; Vacuum standard table 209; Vacuum calibrated meter 210; Solid-state relay 211; Electric hydraulic pump 300; Hydraulic pressure shows and pressure limiting table 301; Hydraulic pressure shows and pressure limiting table contact 301a, 301b; Storage tank 302; Hydraulic pressure sensor 303; Hydraulic valve 304; Hydraulic pressure returns inspection valve 305; Hydraulic pressure micrometering valve 306; Hydraulic pressure power knob 307; Hydraulic pressure out splice going splice 308; Hydraulic pressure standard scale 309; Hydraulic pressure calibrated meter 310; Solid-state relay 311; Steel pipe 1; Steel pipe nut 2; Cutting ferrule 3; Delivery connection 4; Macropore bicone awl pad 5; Gland nut 6; Fuel-displaced even part 7; Dan Pingdan awl awl pad 8,9; Overcoat 10; Zero circle 11; Plunger matching parts 12; Spring 13; The pump housing 14; Bearing 15; Eccentric wheel 16; Motor shaft eccentric wheel 17; Spring bearer plate 18; Plunger 19; Plunger bushing 20; Spring 21; Straight coupling 22; Return inspection valve support ring 23; Return inspection valve V-ring 24; Return inspection valve high pressure pressure ring 25; Return inspection valve pressure pad 26; Return inspection valve gland 27; Return inspection valve rod 28; Return inspection valve body 29; Decorative mat 30; Return inspection valve biconial awl pad 31; Micrometering valve biconial awl pad 32; Micrometering valve support ring 33; Micrometering valve V-ring 34; Micrometering valve high pressure pressure ring 35; Micrometering valve pressure pad 36; Micrometering valve gland nut 37; Micrometering valve valve rod 38.
Embodiment
With reference to Fig. 1, the utility model electric press checking table mainly is made up of three parts: electronic pressure device, pressure control device and the verifying attachment made.The wherein electronic pressure device of making comprises and realizes the electronic electropneumatic pump 100 of making pressure of air pressure, carries out the electronic electric vacuum pump that vacuumizes 200 and realize that hydraulic electric makes the electric hydraulic pump 300 of pressure that electropneumatic pump 100, electric vacuum pump 200 and electric hydraulic pump 300 are in parallel with power supply; Pressure control device comprises air pressure pressure control device, vacuum pressure control device and the hydraulic pressure pressure control device that makes pressure reach predetermined value respectively; The school surveys that device comprises master gauge 109,209,309 and by school tensimeter 110,210,310.
Understand the utility model content for clearer, below air pressure, hydraulic pressure and vacuum verification structure division and principle of work thereof are described respectively.
Atmospheric pressure verification structure and principle of work
Utilize electropneumatic pump 100 to realize the electronic pressure of making, connect an air pressure gas-holder 102, storage air pressure energy in air lift pump 100 outlets.The outlet of air pressure gas-holder 102 also is connected with the air pressure pressure limiting and the pressure transducer 103 of indicator gauge 101 and air pressure valve 104.Air pressure shows and pressure limiting table (coarse adjustment table) 101 can setup pressure value, in order to control bleed pressure maximal value, and demonstration bleed pressure value.Air pressure valve 104 controls enter the air-flow of air pressure pressure control device.The air pressure pressure control device returns inspection valve 105, air pressure micrometering valve 106 and air pressure out splice going splice 108 by air pressure valve 104, air pressure and forms.
When the verification rain glass, normal barometer 109 and calibrated meter 110 are connected on air pressure out splice going splice 108, close air pressure then and return inspection valve 105, open air pressure valve 104, press air lift pump button 107, air lift pump 110 starts and begins to make pressure, when pressure is elevated to required pressure, close air pressure valve 104, adopt enclosed to regulate, transfer to exact value with air pressure micrometering valve 106.Read and the reading of the checkpoint of record standard table 109 and calibrated meter 110.
When returning inspection, open air pressure slightly and return inspection valve 105, when pressure near desirable value near the time, close air pressure again and return inspection valve 105, adopt enclosed to regulate, transfer to desirable value with air pressure micrometering valve 106.Read and record standard table 109 and 110 times cautious readings of calibrated meter.Calibrated meter 109 and standard scale 110 corresponding readings are compared, and calculate error amount.
Vacuum pressure verification structure and principle of work
Utilize vacuum pump 200 to realize electronic vacuumizing, air pressure gas-holder 202 of vacuum pump 200 outlet series connection is at 201, one vacuum valves 204 of air pressure gas-holder 202 an outlets vacuum pressure indicator gauge (coarse adjustment table) in parallel.Vacuum pressure indicator gauge 201 shows vacuum source pressure coarse adjustment numerical value.When opening vacuum valve 204, pipeline and vacuum pressure control device are connected.The air-flow of pressure control device is flowed out in vacuum valve 204 controls.The vacuum pressure control device returns inspection valve 205, vacuum micrometering valve 206 and quick out splice going splice 208 by vacuum valve 204, vacuum vacuum and forms.
During the vacuum pressure verification, will be connected on the quick out splice going splice 208, and close the vacuum vacuum and return inspection valve 205, open vacuum valve 204 by school vacuum meter 210 and standard scale 209.Press vacuum pump button 207 then, vacuum pump 200 begins to vacuumize, at this moment observe data on the vacuum pressure indicator gauge 201, when near required numerical value, close vacuum valve 204, the employing enclosed is regulated, and transfers to required exact value with vacuum micrometering valve 206, reads and the checkpoint reading of record standard table 209 and calibrated meter 210.When returning inspection, open the vacuum vacuum slightly and return inspection valve 205,, close the vacuum vacuum and return inspection valve 205, adopt enclosed to regulate, transfer to required accurate pressure value with vacuum micrometering valve 206 when pressure during near desirable value.Read and record standard table 209 and 210 times cautious readings of calibrated meter.Calibrated meter 210 and standard scale 209 corresponding readings are compared, and calculate error amount.
Hydraulic pressure verification structure and principle of work
The hydraulic pump 300 electronic pressures of making go out oil pressure, liquid flows to into storage tank 302, storage tank 302 plays buffering hydraulic pressure pumping rate, liquid stream divides two the tunnel after coming out from storage tank 302, one the tunnel enters the pressure transducer 303 of demonstration and pressure limiting table (coarse adjustment table) 301, show the hydraulic power source force value by coarse adjustment table 301, but and setup pressure value hydraulic power source is carried out pressure limiting; Another road enters the hydraulic pressure pressure control device, and the hydraulic pressure pressure control device returns inspection valve 305, hydraulic pressure micrometering valve 306 and hydraulic pressure out splice going splice 308 by hydraulic valve 304, hydraulic pressure and forms.
During the hydraulic pressure verification, earlier hydraulic pressure calibrated meter 3 10 and standard scale 309 are contained on the hydraulic pressure out splice going splice 308, close hydraulic pressure and return inspection valve 305, open hydraulic valve 304, press hydraulic pump 300 shift knobs, make pressure by hydraulic pump 300, observe hydraulic pressure and show and the pressure limiting table, in the time of near pressure is increased to required force value, close hydraulic valve 304 again, the employing enclosed is regulated, and accurately transfers to required force value by hydraulic pressure micrometering valve 306.Read and write down the reading of calibrated meter 310 and standard scale 309, calibrated meter 310 is compared with standard scale 309 corresponding readings, and calculate error amount.
Electronics pressure limiting device principle of work
On pressure demonstration and pressure limiting table 101,201 and 301, set pressure limiting numerical value, when pressure reaches this setting numerical value, 101a on the pressure limiting table 101,101b contact disconnect, at this moment the 5V DC current control power supply of supplying with solid-state relay SSR disconnects, then solid-state relay is exported to the 220V AC power disconnection of motor, then motor stall, and forcing pump is no longer suppressed, pressure stops to rise, and has reached the pressure limiting effect.
As shown in Figure 2, the following describes the principle of work of the hydraulic pump 300 that uses in the utility model electric press checking table.
When motor rotates; the axle 17 of hydraulic pump 300 drives eccentric wheel 16 and rotates; eccentric wheel 16 outsides are with rolling bearing 15; then rolling bearing 15 is followed eccentric wheel 16 rotations; the rotation of bearing 15 overcoats will promote plunger 19 and move to left; to be depressed into oil-out via retaining valve (fuel-displaced even part) 7 after the oil pressurization of oil-in inspiration, retaining valve 7 stops hydraulic oil to reflux; spring 13 promotes plunger 19 and moves to right; when plunger 19 was opened oil-in, the oil of fuel tank entered plunger cavity, and moved to left once more when sealing oil-in when plunger 19; to the oil pressurization of sealing; open retaining valve 7 and enter oil-out, for fear of plunger 19 under lateral forces, shift out under the too much situation of plunger bushing by card disconnected; designed spring bearer plate 18; spring bearer plate 18 has guide effect in addition except being subjected to fixing spring 13 effects, so that protection plunger 19.With eccentric throw of plunger 19 and the reach of rolling bearing overcoat contact point reverse rotational direction, the sloping gradient that at this moment makes stopper head climb is little simultaneously, and all less than 90 °, the degree that plunger 19 produces transverse movement has diminished, and it is disconnected to be difficult for card.
And the hydraulic pump gear train has adopted low noise Guo dynamic bearing eccentric wheel 16, and sliding friction is become rolling friction, greatly reduces noise.Motor output shaft 17 ends add shaft column, change the state of single support beam, have increased transmission rigidity, have reduced noise.Because adopt above-mentioned gear train, sliding friction becomes rolling friction, becomes hundred times of ground to reduce friction, thereby required driving torque hydraulic pump drive motor drops to 60W by 90W, dropping to 40W, all can make pump generation output pressure＞100Mpa.Because power of motor reduces, the noise that is produced also reduces significantly;
Strengthen sealing in order to improve, the utility model improves from static seal and two aspects of motive seal.Be elaborated respectively below.
At first, Fig. 3 a-3c shows the cut-open view of three kinds of awl pads that form static seal in the hydraulic pump 300 shown in Figure 2.In hydraulic pump 300, be provided with Dan Pingdan awl awl pad 9 between plunger bushing 20 and the overcoat 10, and between fuel-displaced even part 7 and overcoat 10, be provided with Dan Pingdan awl awl pad 8, be used to form static seal; In delivery connection 4, be provided with macropore bicone awl pad 5.
Shown in Fig. 3 a is that the biconial awl fills up, be used for diameter greater than φ 2 with less than the aperture joint of φ 6, the end face of aperture keeps wedge angle, for keeping wedge angle, the aperture end finish will keep 0.8 , and awl pad two ends keep 10 ° of taperings, luminosity guarantees 0.8 , material selection brass is easy to form the state that elastic deformation and plastic yield combine into aperture end face wedge angle embeds.
Shown in Fig. 3 b is that Dan Pingdan awl awl fills up, it is used for an end aperture, one transverse plane sealing place (for example: plunger matching parts 12 oil outlet ends, fuel-displaced even part 7 oil inlet ends) its conical surface end is required and the end face of aperture requires and the end face of aperture requires to bore with bicone and fills up, to planar ends photometric requirement 0.4 of awl pad, be easy to sealing.Material selection brass is easy to aperture end face wedge angle and embeds the conical surface, forms and plays the state that flow shape combines, and planar ends easily produces elastic deformation.
Shown in Fig. 3 c is that macropore bicone awl fills up 5, and it is used for two ends and is macropore, or an end macropore, an end aperture.The former is similar to the sealing of two ends apertures, and the latter adds at the small bore end housing parts and to do auxiliary big hole end surface wedge angle, and the selection of material also be a brass, easily forms bullet flow shape bonding state.
Above-mentioned bullet flow shape bonding state, firmly little during assembling, but be easy to form sealing to high pressure, when being pressurized to 160Mpa, seepage does not appear.
Secondly, movable sealing structure is described.About motive seal, be meant the sealing of motion process, micrometering valve for example, the valve rod place sealing of stop valve.The utility model has adopted the sealed letter form, referring to Fig. 4 and Fig. 6, Fig. 4 and Fig. 6 show the cut-open view that hydraulic pressure returns inspection valve 305 and hydraulic pressure micrometering valve 306 respectively, as shown in Figure 4, in returning the sealed letter of examining valve 305, hydraulic pressure stacked support ring 23, V-ring 24 and high pressure pressure ring 25 successively, pressure pad 26; As shown in Figure 6, in the sealed letter of micrometering valve, be placed with support ring 33, V-ring 34, high pressure pressure ring 35, pressure pad 36 with the same manner.
Fig. 5 a, 5b and 5c have provided the axial cut-open view of support ring 23, V-ring 24 and high pressure pressure ring 25 respectively.The material selection teflon of V-ring and pressure ring wherein, V-ring cross section profile is the V groove with outside surface and inside surface formation, the dual-side of V groove inside surface forms lower angle α, the dual-side of V groove outside surface forms upper angle β, the selection of lower angle α and upper angle β is relevant with working pressure, for low pressure, then adopting lower angle α is 50 °, and upper angle β is 60 °; And for high pressure, then lower angle α is 90 °, and upper angle β is 100 °.
As shown in Figure 6, when assembling, gland nut 37 rotations press down pressure pad 36, pressure pad 36 moves down and forces V-ring 34 and pressure ring angle to become big, and the internal diameter external diameter that diminishes becomes big, make V-ring 34 and pressure ring 35 in encircle tight valve rod 38, outer shroud stretching sealed letter outer wall forms the predeformation sealing.When pressure increased gradually, under the effect of pressure, the distortion of V-ring 34 and pressure ring 35 was increased and is strengthened gradually with pressure, forms the state that a kind of predeformation and pressure correlation distortion combines, and makes valve rod 38 places to rotate, again the state that can seal.According to compressive resistance 24 hours test, when pressure reached 120Mpa～160Mpa, the oil impregnate phenomenon did not take place in valve rod 38 places yet.
Claims (8)
1, a kind of electric press checking table that is used for verification hydraulic pressure, air pressure and vacuum pressure, comprise and electronicly make pressure device, make the pressure control device that pressure device links to each other and the school that links to each other with pressure control device by out splice going splice (101,201,301) surveyed device, it is characterized in that with electronic:
The electronic pressure device of making comprises with power supply and linking to each other and air lift pump (100), vacuum pump (200) and hydraulic pump (300) parallel with one another that air lift pump (100), vacuum pump (200) and hydraulic pump (300) are connected air pressure gas-holder (102), vacuum air storage tank (202) and storage tank (302) respectively;
Pressure control device comprises the air pressure pressure control device that links to each other with air pressure gas-holder (102), vacuum pressure control device that links to each other with vacuum air storage tank (202) and the hydraulic pressure pressure control device that links to each other with storage tank (302);
The school is surveyed device and is comprised air pressure standard scale (109), vacuum standard table (209) and the hydraulic pressure standard scale (309) that links to each other with air pressure pressure control device, vacuum pressure control device and hydraulic pressure pressure control device respectively, wherein
Also comprise the electronics pressure limiting device (111,211,311) that links to each other, links to each other with the hydraulic pressure pressure control device, links to each other with the gentle voltage-controlled pressure device of air lift pump (100) respectively with vacuum pump (200) with hydraulic pump (300).
2, electric press checking table as claimed in claim 1 is characterized in that:
Described air pressure pressure control device comprises the air pressure valve (104) that is connected with described air pressure gas-holder (102), air pressure micrometering valve (106), the air pressure that is connected with described air pressure valve (104) returns inspection valve (105), and atmospheric pressure pressure limiting that is connected with described air pressure micrometering valve (106) and indicator gauge (101);
Described vacuum pressure control device comprises vacuum valve (204), the vacuum pressure indicator gauge (201) that is connected with described vacuum air storage tank (102), vacuum micrometering valve (206), the vacuum that is connected with described vacuum valve (204) returned inspection valve (205), and the vacuum pressure indicator gauge (201) that is connected with described vacuum micrometering valve (206);
Described hydraulic pressure pressure control device comprises the hydraulic valve (304) that is connected with described storage tank (302), hydraulic pressure micrometering valve (306), the hydraulic pressure that is connected with described hydraulic valve (304) returns inspection valve (105), and hydraulic pressure pressure limiting that is connected with described hydraulic pressure micrometering valve (306) and indicator gauge (301).
3, electric press checking table as claimed in claim 1 or 2 is characterized in that:
Described hydraulic pump (300) comprises eccentric wheel (16) and the plunger body that is installed on the motor shaft (17), institute's eccentric wheel (16) outside is with rolling bearing (15), described plunger body comprises plunger (19), plunger bushing (20), be enclosed within the plunger matching parts (12) and the overcoat (10) of plunger bushing outside, plunger (19) one ends are provided with the spring bearer plate (18) that contacts with rolling bearing (16) excircle, spring (13) one ends that are enclosed within on the plunger bushing (20) lean against on the described spring bearer plate (18), the other end leans against on the described plunger matching parts (12), and described overcoat (10) is connected with delivery connection (4).
4, electric press checking table as claimed in claim 3, it is characterized in that, be provided with the Dan Pingdan awl awl pad (9) that is used to seal between described plunger bushing (20) and the described overcoat (10), described overcoat (10) one ends insert in the inner groovy of described delivery connection (4) and lean against bottom the inner groovy by macropore bicone awl pad (5).
5, electric press checking table as claimed in claim 2 is characterized in that:
Hermetically-sealed construction in the described hydraulic pressure micrometering valve (306) adopts the sealed letter structure, is included in and stacks support ring (33), V-ring (34), high pressure pressure ring (35) and pressure pad (36) on the micrometering valve valve rod successively.
6, the described electric press checking table of claim 5 is characterized in that:
The xsect profile of described V-ring (34) is the V groove with the outside and inboard, and the dual-side in the outside forms upper angle β, and inboard dual-side forms lower angle α.
7, the electric press checking table stated of claim 6, it is characterized in that: for low pressure, described lower angle α is 50 °, and described upper angle β is 60 °; For high pressure, described lower angle α is 90 °, and described upper angle β is 100 °.
8, electric press checking table as claimed in claim 1 or 2 is characterized in that: described electronics pressure limiting device is a solid-state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03265445 CN2639869Y (en) | 2003-06-10 | 2003-06-10 | Electric pressure checking table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03265445 CN2639869Y (en) | 2003-06-10 | 2003-06-10 | Electric pressure checking table |
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| Publication Number | Publication Date |
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| CN2639869Y true CN2639869Y (en) | 2004-09-08 |
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| CN 03265445 Expired - Fee Related CN2639869Y (en) | 2003-06-10 | 2003-06-10 | Electric pressure checking table |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384816A (en) * | 2011-10-19 | 2012-03-21 | 浙江中烟工业有限责任公司 | Suction resistance meter differential pressure sensor calibration system and method |
| CN102980720A (en) * | 2012-11-21 | 2013-03-20 | 江苏润仪仪表有限公司 | Wide-range electric pressure debugging meter |
| CN103091037A (en) * | 2011-10-27 | 2013-05-08 | 上海宝钢设备检修有限公司 | On-line verifying device of pneumatic wide-range pressure transmitter |
| CN103439050A (en) * | 2013-08-30 | 2013-12-11 | 国家电网公司 | Simple Liquid-column type measuring device for calibrating vacuum |
| CN103557990A (en) * | 2013-10-11 | 2014-02-05 | 中国人民解放军63908部队 | All-round verifying device for pressure instrument equipment |
| CN105043665A (en) * | 2015-08-26 | 2015-11-11 | 北京龙马负图科技有限公司 | Intensity of pressure detection system possessing automatic calibration function and calibration method thereof |
| CN109374201A (en) * | 2018-11-07 | 2019-02-22 | 中国航空工业集团公司西安飞机设计研究所 | Multi-functional pressure calibrating installation |
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2003
- 2003-06-10 CN CN 03265445 patent/CN2639869Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384816A (en) * | 2011-10-19 | 2012-03-21 | 浙江中烟工业有限责任公司 | Suction resistance meter differential pressure sensor calibration system and method |
| CN103091037A (en) * | 2011-10-27 | 2013-05-08 | 上海宝钢设备检修有限公司 | On-line verifying device of pneumatic wide-range pressure transmitter |
| CN102980720A (en) * | 2012-11-21 | 2013-03-20 | 江苏润仪仪表有限公司 | Wide-range electric pressure debugging meter |
| CN103439050A (en) * | 2013-08-30 | 2013-12-11 | 国家电网公司 | Simple Liquid-column type measuring device for calibrating vacuum |
| CN103557990A (en) * | 2013-10-11 | 2014-02-05 | 中国人民解放军63908部队 | All-round verifying device for pressure instrument equipment |
| CN103557990B (en) * | 2013-10-11 | 2016-04-06 | 中国人民解放军63908部队 | The all-round calibrating installation of a kind of manometer equipment |
| CN105043665A (en) * | 2015-08-26 | 2015-11-11 | 北京龙马负图科技有限公司 | Intensity of pressure detection system possessing automatic calibration function and calibration method thereof |
| CN105043665B (en) * | 2015-08-26 | 2019-06-14 | 北京龙马负图科技有限公司 | A kind of pressure detection system and its calibration method with automatic calibration function |
| CN109374201A (en) * | 2018-11-07 | 2019-02-22 | 中国航空工业集团公司西安飞机设计研究所 | Multi-functional pressure calibrating installation |
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