CN105352711B - A kind of constant pressure valve and its detection means and detection method - Google Patents
A kind of constant pressure valve and its detection means and detection method Download PDFInfo
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- CN105352711B CN105352711B CN201510731143.4A CN201510731143A CN105352711B CN 105352711 B CN105352711 B CN 105352711B CN 201510731143 A CN201510731143 A CN 201510731143A CN 105352711 B CN105352711 B CN 105352711B
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Abstract
The invention discloses a kind of constant pressure valve and its detection means and detection method, including valve body, bonnet is installed on the valve body, valve head is installed in the valve body, sliding block is installed on the valve head, bonnet is socketed with outside the upper end of slide block, on the sliding block the first spring is installed between top surface and bonnet, first sealing ring is installed between the slider side wall and bonnet, and Teflon ferrules are socketed with outside first sealing ring.A kind of constant pressure valve of the present invention and its detection means and detection method, constant pressure valve arrangement is simple, good airproof performance, and valve opening is sensitive；Its detection means and detection method can detect the valve opening ability of pressure valve simultaneously and close valve internal leakage and life test, and detection process is simple, and Detection accuracy is high.
Description
Technical field
The present invention relates to a kind of constant pressure valve and its detection means and detection method.
Background technology
Because production needs, air-cooled heat pump unit, the freezing unit (cryogenic system) for being intended to operation throughout the year, handpiece Water Chilling Units
(air-conditioning system), often because the reasons such as weather conditions run into cold start-up situation.During cold start-up, due to the condensation temperature of system
Too low, the high pressure end pressure of system does not increase after compressor start, and compressor high and low pressure side can not establish enough height pressure differences,
And compressor can be caused not load；Compressor oil-supplying deficiency, compressor may be because lubricating, cooling down insufficient and badly damaged pressure
Contracting machine.After using constant pressure valve, compressor to start shooting such as system, compressor can in a short time set up rapidly enough
Height pressure difference, and then ensure that compressor displacement regulating loading is smooth, ensure that compressor does not have undesirable effect because losing oil.Constant pressure
Power valve when the compressor is shut down, can cut off compressor rapidly and be connected with gas exhaust piping, prevent high pressure gas with non-return valve action
Body passes back into compressor, effectively avoids compressor from inverting for a long time.
But constant pressure valve used at present is because the sealing between valve head and valve body, sliding block is poor, with pressure valve
Its easy the problems such as leaking of the increase of usage time.Constant pressure valve needed before dispatching from the factory to the valve opening ability of pressure valve and
Close valve internal leakage checked respectively, but at present used in detection device its single can only all be detected, and detect
Process is complicated, and Detection accuracy is low.
The content of the invention
It is an object of the invention to provide a kind of constant pressure valve and its detection means and detection method, constant pressure valve knot
Structure is simple, good airproof performance, and valve opening is sensitive；Its detection means and detection method can detect valve opening ability and the pass of pressure valve simultaneously
Valve internal leakage and life test, and detection process is simple, Detection accuracy is high.
In order to achieve the above object, the technical scheme is that：
A kind of constant pressure valve, including valve body, bonnet is installed on the valve body, valve head, institute are installed in the valve body
State and sliding block is installed on valve head, be socketed with bonnet outside the upper end of slide block, be provided with the on the sliding block between top surface and bonnet
One spring, the first sealing ring is installed between the slider side wall and bonnet, and polytetrafluoro is socketed with outside first sealing ring
Ethene lasso.
The first valve body connector, the second valve body connector are separately installed with the valve body, being provided with bonnet on the bonnet connects
Head；First nut is installed in first valve body connector, first is provided between first valve body connector and the first nut
Sealing cap；Second nut is installed in second valve body connector, is provided between second nut and the second valve body connector
Two bonnets；Bonnet nut is installed on the valve head connection, bonnet sealing cap is installed between the bonnet nut and valve head connection.
The valve head bottom surface offers sealed groove, is provided with the second sealing ring in the sealed groove, on the valve body
Projection, and the projection and the second sealing ring linear contact lay are installed.
The projection includes base, wedge angle jacking block, and the base is connected with wedge angle jacking block, the top of the wedge angle jacking block and
Second sealing ring linear contact lay；The sealed groove is inverted trapezoidal sealed groove, the inverted trapezoidal sealed groove and the second sealing ring
Screens is connected.
Top surface offers spring groove on the sliding block, and the first spring, first spring are installed in the spring groove
Pad is installed in the spring groove of lower section；Second spring is installed between the valve head and sliding block.
The valve head bottom surface offers arcuation groove.
The valve body is connected by the first bolt with lower female connector, and is socketed with first flange outside the lower female connector；The valve
Body is connected by the second bolt with female connector, and second flange is socketed with outside the female connector.
A kind of detection means of constant pressure valve, including monitor station, detection product is separately installed with the monitor station and is consolidated
Determine tooling platform, guidance panel, master switch, low-pressure relief valve, high-pressure pressure-reducing valve, display are separately installed with the guidance panel
Screen, low pressure gauge, low pressure indicator lamp, high-pressure manometer, HT pilot, spinner flowmeter.
Low-pressure gas source inlet port, high-pressure air source inlet port are separately installed with the monitor station, wherein the low-pressure gas source
Inlet port is connected with first pressure table, and the first pressure table is connected with the first magnetic valve, and first magnetic valve and first passes
Sensor is connected, and the first sensor is connected with magnetic valve；The high-pressure air source inlet port is connected with second pressure gauge, and described
Two pressure gauges are connected with high-pressure solenoid valve, and the high-pressure solenoid valve is connected with high pressure sensor, the high pressure sensor and electromagnetism
Valve is connected；The magnetic valve is connected after product fixed tooling platform by detecting with second sensor, the second sensor difference
It is connected with second solenoid valve, the 3rd magnetic valve, the second solenoid valve is connected with muffler, the 3rd magnetic valve and flowmeter
It is connected.
A kind of detection method of the detection means of constant pressure valve, comprises the following steps：
（1）Test constant pressure valve valve opening ability
Low-pressure relief valve, which is opened, first is adjusted to set pressure, and then low pressure represents setting pressure, then the first electromagnetism
Valve is opened, and then gas enters gas receiver, and then gas receiver first sensor work shows pressure constant pressure valve opening pressure
Scope, constant pressure valve valve opening is then tested, then constant pressure valve outlet side second sensor work shows pressure rise, connects
High-pressure solenoid valve opening, is finally vented, then workpiece valve opening ability is qualified；It is adjusted to set pressure if low-pressure relief valve is opened, connects
Low pressure gauge display setting pressure, then the first magnetic valve is opened, and then gas enters gas receiver, then gas receiver first
Working sensor shows pressure constant pressure valve opening pressure scope, then tests constant pressure valve valve opening, then tests constant
The work of pressure valve outlet end pressure second sensor shows that pressure does not raise, and then siren sounds, then workpiece is unqualified, opens
Valve hypertonia；It is adjusted to set pressure if low-pressure relief valve is opened, then low pressure gauge display setting pressure, then the first electricity
Magnet valve is opened, and then gas enters gas receiver, and then gas receiver first sensor work shows pressure less than constant pressure valve most
Small cracking pressure, constant pressure valve valve opening is then tested, then constant pressure valve outlet side second sensor work shows pressure
Rise, then siren sounds, then workpiece is unqualified, and cracking pressure is too low；
（2）Test constant pressure valve and close valve internal leakage
Low-pressure relief valve, which is opened, first is adjusted to set pressure, low pressure gauge display setting pressure, and the first magnetic valve is opened,
Gas enters gas receiver, and the work of gas receiver first sensor shows pressure setting pressure, tests constant pressure valve valve opening, constant pressure
The second sensor work of power valve outlet side shows pressure rise, and high-pressure solenoid valve is opened, and exhaust, second solenoid valve is opened and lets out gas storage
Cylinder pressure, the work of gas receiver first sensor show that pressure is constant pressure valve minimum cracking pressure 90%, and high-pressure solenoid valve is closed
Close, second solenoid valve is closed, and test constant pressure valve closes valve, and the 3rd magnetic valve is opened, and flowmeter is worked by spinner flowmeter
Flow value is shown, for internal leakage value in range of set value, workpiece is qualified；It is adjusted to set pressure, low pressure if low-pressure relief valve is opened
Pressure gauge display setting pressure, the first magnetic valve are opened, and gas enters gas receiver, and the work of gas receiver first sensor shows pressure
Pressure is set, tests constant pressure valve valve opening, second sensor work in constant pressure valve outlet side shows pressure rise, high-tension electricity
Magnet valve is opened, exhaust, and second solenoid valve, which is opened, lets out gas storage cylinder pressure, and gas receiver first sensor work display pressure is constant
Pressure valve minimum cracking pressure 90%, high-pressure solenoid valve are closed, and second solenoid valve is closed, and test constant pressure valve closes valve, the 3rd electricity
Magnet valve is opened, and flowmeter is worked by spinner flowmeter shows flow value, and in range of set value, siren rings internal leakage value
Rise, workpiece internal leakage is exceeded unqualified；
（3）Test constant pressure valve life test
Break-make of the pressure test gas of 1.1 times of constant pressure valve maximum Opening pressure in constant pressure valve is set first
Time and break-make number, are then detected in constant pressure valve according to the make-and-break time of setting and break-make number, unqualified
Then alarm, it is qualified, continue test until the break-make number of setting has all been surveyed.
The beneficial effects of the invention are as follows：A kind of constant pressure valve and its detection means and detection method, constant pressure valve knot
Structure is simple, good airproof performance, and valve opening is sensitive；Its detection means and detection method can detect valve opening ability and the pass of pressure valve simultaneously
Valve internal leakage and life test, and detection process is simple, Detection accuracy is high.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial enlarged drawing of B in Fig. 1；
Fig. 3 is the partial enlarged drawing of A in Fig. 1；
Fig. 4 is the external structure schematic diagram of detection means；
Fig. 5 is the inside schematic diagram of detection means.
Embodiment
Embodiment 1
A kind of constant pressure valve as shown in Figure 1, Figure 2, Figure 3 shows, including valve body 1, bonnet 2 is installed on the valve body 1, it is described
Valve head 3 is installed in valve body 1, sliding block 4 is installed on the valve head 3, bonnet 2, the sliding block are socketed with outside the upper end of sliding block 4
First spring 5 is installed on 4 between top surface and bonnet 2, the first sealing ring 6 is installed between the side wall of sliding block 4 and bonnet 2,
And it is socketed with Teflon ferrules 7 outside first sealing ring 6.Socket Teflon ferrules 7 outside first sealing ring 6, no
The sealing of the side wall of sliding block 4 and bonnet 2 can be only improved, and the abrasion of the first sealing ring 6 can be reduced, so as to effectively improve
The service life of pressure valve.
The first valve body connector 8, the second valve body connector 9 are separately installed with the valve body 1, valve is installed on the bonnet 2
Lid joint 10；First nut 16 is installed in first valve body connector 8, the nut 16 of the first valve body connector 8 and first it
Between the first sealing cap 17 is installed；Second nut 18, the valve of the second nut 18 and second are installed in second valve body connector 9
Second bonnet 19 is installed between body joint 9；Bonnet nut 20 is installed on the valve head connection 10, the bonnet nut 20 with
Bonnet sealing cap 21 is installed between valve head connection 10.
The bottom surface of valve head 3 offers sealed groove 11, and the second sealing ring 12 is provided with the sealed groove 11, described
Projection 13, and the linear contact lay of 13 and second sealing ring of the projection 12 are installed on valve body 1.Valve head 3 used at present and valve body 1
Between contacted using face, face contact has that sealing is low, is easily revealed with the increase of usage time.Projection 13 and second close
The linear contact lay of seal 12 can effectively improve the sealing between valve head 3 and valve body 1, so as to improve service life.
The projection 13 includes base 14, wedge angle jacking block 15, and the base 14 is connected with wedge angle jacking block 15, the wedge angle top
The top of block 15 and the linear contact lay of the second sealing ring 12；The sealed groove 11 is inverted trapezoidal sealed groove, the inverted trapezoidal sealing
Groove is connected with the screens of the second sealing ring 12.Inverted trapezoidal sealed groove is connected with the screens of the second sealing ring 12, not only easy for installation,
Good sealing effect, and inverted trapezoidal sealed groove is arranged to the second sealing ring 12 and expanded with heat and contract with cold leave space.
Top surface offers spring groove 22 on the sliding block 4, the first spring 5 of installation in the spring groove 22, and described the
Pad 23 is installed in the spring groove 22 of the lower section of one spring 5；Second spring 25 is installed between the valve head 3 and sliding block 4.
The bottom surface of valve head 3 offers arcuation groove 24.The setting of arcuation groove 24 increases the lifting surface area of valve head 3, from
And effectively increase the valve opening sensitivity of pressure valve.
The valve body 1 is connected by the first bolt 26 with lower female connector 27, and is socketed with first flange outside the lower female connector 27
28；The valve body 1 is connected by the second bolt 29 with female connector 30, and second flange 31 is socketed with outside the female connector 30.
A kind of detection means of constant pressure valve as shown in Figure 4, including monitor station 40, pacify respectively on the monitor station 40
Equipped with detection product fixed tooling platform 41, guidance panel 41, master switch 42 is separately installed with the guidance panel 41, low pressure subtracts
Pressure valve 48, high-pressure pressure-reducing valve 49, display screen 39, low pressure gauge 43, low pressure indicator lamp 44, high-pressure manometer 45, high pressure instruction
Lamp 46, spinner flowmeter 47.
As shown in figure 5, low-pressure gas source inlet port 50, high-pressure air source inlet port 51 are separately installed with the monitor station 40,
Wherein described low-pressure gas source inlet port 50 is connected with first pressure table 52, the first pressure table 52 and the phase of the first magnetic valve 53
Even, first magnetic valve 53 is connected with first sensor 54, and the first sensor 54 is connected with magnetic valve 55；The high pressure
Source of the gas inlet port 51 is connected with second pressure gauge 56, and the second pressure gauge 56 is connected with high-pressure solenoid valve 57, the high-tension electricity
Magnet valve 57 is connected with high pressure sensor 58, and the high pressure sensor 58 is connected with magnetic valve 55；The magnetic valve 55 passes through detection
Be connected after product fixed tooling platform 41 with second sensor 59, the second sensor 59 respectively with second solenoid valve the 60, the 3rd
Magnetic valve 61 is connected, and the second solenoid valve 60 is connected with muffler 62, and the 3rd magnetic valve 61 is connected with flowmeter 63.
A kind of detection method of the detection means of constant pressure valve, comprises the following steps：
（1）Test constant pressure valve valve opening ability
Low-pressure relief valve 48 is opened and is adjusted to 0.36MPa first, and then low pressure gauge 43 shows 0.36MPa, then the first electricity
Magnet valve 53 is opened, and then gas enters gas receiver, and the then work of gas receiver first sensor 54 shows pressure 0.36MPa, then
Constant pressure valve valve opening is tested, the then work of constant pressure valve outlet side second sensor 59 shows pressure rise, then high pressure
Magnetic valve 57 is opened, and is finally vented, then workpiece valve opening ability is qualified；If low-pressure relief valve 48 is opened and is adjusted to 0.36MPa, then low
Pressure pressure table 43 shows 0.36MPa, and then the first magnetic valve 53 is opened, and then gas enters gas receiver, then gas receiver first
The work of sensor 54 shows pressure 0.36MPa, then tests constant pressure valve valve opening, then tests constant pressure valve outlet side pressure
The work of power second sensor 59 shows that pressure does not raise, and then siren sounds, then workpiece is unqualified, and cracking pressure is too high；
If low-pressure relief valve 48 is opened and is adjusted to 0.36MPa, then low pressure gauge 43 shows 0.36MPa, and then the first magnetic valve 53 is beaten
Open, then gas enters gas receiver, and the then work of gas receiver first sensor 54 shows pressure 0.2MPa, then tests constant pressure
Power valve valve opening, the then work of constant pressure valve outlet side second sensor 59 show pressure rise, and then siren sounds, then work
Part is unqualified, and cracking pressure is too low；
（2）Test constant pressure valve and close valve internal leakage
Low-pressure relief valve opens modulation 0.36MPa first, and low pressure gauge shows 0.36MPa, and the first magnetic valve is opened, gas
Body enters gas receiver, and the work of gas receiver first sensor shows pressure 0.36MPa, tests constant pressure valve valve opening, constant pressure
The second sensor work of valve outlet side shows pressure rise, and high-pressure solenoid valve is opened, and exhaust, second solenoid valve is opened and lets out gas receiver
Interior pressure, the work of gas receiver first sensor show pressure 0.30MPa, and high-pressure solenoid valve is closed, and second solenoid valve is closed, test
Constant pressure valve closes valve, and the 3rd magnetic valve is opened, and flowmeter is worked by spinner flowmeter and shows flow value, and internal leakage value is being set
In limits, workpiece is qualified；If low-pressure relief valve opens modulation 0.36MPa, low pressure gauge shows 0.36MPa, the first electricity
Magnet valve is opened, and gas enters gas receiver, and the work of gas receiver first sensor shows pressure 0.36MPa, and test constant pressure valve is opened
Valve, the work of constant pressure valve outlet side second sensor show pressure rise, and high-pressure solenoid valve is opened, exhaust, second solenoid valve
Opening lets out gas storage cylinder pressure, and the work of gas receiver first sensor shows pressure 0.30MPa, and high-pressure solenoid valve is closed, the second electricity
Magnet valve is closed, and test constant pressure valve closes valve, and the 3rd magnetic valve is opened, and flowmeter is worked by spinner flowmeter and shows flow
Value, internal leakage value is in range of set value, and siren sounds, and workpiece internal leakage is exceeded unqualified.
（3）Test constant pressure valve life test
Make-and-break time and break-make number of the 0.43MPa test gases in constant pressure valve are set first, then constant
Detected in pressure valve according to the make-and-break time and break-make number of setting, unqualified then alarm is qualified, continues to test
Until the break-make number of setting has all been surveyed.
A kind of constant pressure valve and its detection means and detection method of the present embodiment, constant pressure valve arrangement is simple, close
Envelope property is good, and valve opening is sensitive；Its detection means and detection method can detect the valve opening ability of pressure valve simultaneously and close valve internal leakage
Amount and life test, and detection process is simple, Detection accuracy is high.
Claims (8)
- A kind of 1. detection means of constant pressure valve, it is characterised in that：Including valve body (1), bonnet is installed on the valve body (1) (2) valve head (3), is installed in the valve body (1), sliding block (4), sliding block (4) upper end overcoat are installed on the valve head (3) Be connected to bonnet (2), the first spring (5) be installed on the sliding block (4) between top surface and bonnet (2), sliding block (4) side wall with First sealing ring (6) is installed between bonnet (2), and Teflon ferrules (7) are socketed with outside first sealing ring (6)；Also include monitor station (40), detection product fixed tooling platform (41), operating surface are separately installed with the monitor station (40) Plate (41), be separately installed with the guidance panel (41) master switch (42), low-pressure relief valve (48), high-pressure pressure-reducing valve (49), Display screen (39), low pressure gauge (43), low pressure indicator lamp (44), high-pressure manometer (45), HT pilot (46), rotor stream Gauge (47)；Low-pressure gas source inlet port (50), high-pressure air source inlet port (51) are separately installed with the monitor station (40), wherein described Low-pressure gas source inlet port (50) is connected with first pressure table (52), the first pressure table (52) and the first magnetic valve (53) phase Even, first magnetic valve (53) is connected with first sensor (54), and the first sensor (54) is connected with magnetic valve (55)； The high-pressure air source inlet port (51) is connected with second pressure gauge (56), the second pressure gauge (56) and high-pressure solenoid valve (57) It is connected, the high-pressure solenoid valve (57) is connected with high pressure sensor (58), the high pressure sensor (58) and magnetic valve (55) phase Even；The magnetic valve (55) is connected with second sensor (59) afterwards by detecting product fixed tooling platform (41), and described second passes Sensor (59) is connected with second solenoid valve (60), the 3rd magnetic valve (61) respectively, the second solenoid valve (60) and muffler (62) it is connected, the 3rd magnetic valve (61) is connected with flowmeter (63).
- A kind of 2. detection means of constant pressure valve according to claim 1, it is characterised in that：Divide on the valve body (1) First valve body connector (8), the second valve body connector (9) are not installed, valve head connection (10) is installed on the bonnet (2)；It is described First nut (16) is installed in the first valve body connector (8), installed between first valve body connector (8) and the first nut (16) There is the first sealing cap (17)；Second nut (18), second nut (18) and second are installed on second valve body connector (9) Second bonnet (19) is installed between valve body connector (9)；Bonnet nut (20), the valve are installed on the valve head connection (10) Bonnet sealing cap (21) is installed between lid nut (20) and valve head connection (10).
- A kind of 3. detection means of constant pressure valve according to claim 1, it is characterised in that：Valve head (3) bottom surface Sealed groove (11) is offered, the second sealing ring (12) is installed in the sealed groove (11), is provided with the valve body (1) Projection (13), and the projection (13) and the second sealing ring (12) linear contact lay.
- A kind of 4. detection means of constant pressure valve according to claim 3, it is characterised in that：The projection (13) includes Base (14), wedge angle jacking block (15), the base (14) are connected with wedge angle jacking block (15), the top of the wedge angle jacking block (15) with Second sealing ring (12) linear contact lay；The sealed groove (11) is inverted trapezoidal sealed groove, the inverted trapezoidal sealed groove and Two sealing rings (12) screens is connected.
- A kind of 5. detection means of constant pressure valve according to claim 1, it is characterised in that：Pushed up on the sliding block (4) Face offers spring groove (22), the first spring of installation (5) in the spring groove (22), below first spring (5) Pad (23) is installed in spring groove (22)；Second spring (25) is installed between the valve head (3) and sliding block (4).
- A kind of 6. detection means of constant pressure valve according to claim 1, it is characterised in that：Valve head (3) bottom surface Offer arcuation groove (24).
- A kind of 7. detection means of constant pressure valve according to claim 1, it is characterised in that：The valve body (1) passes through First bolt (26) is connected with lower female connector (27), and is socketed with first flange (28) outside the lower female connector (27)；The valve body (1) It is connected by the second bolt (29) with female connector (30), second flange (31) is socketed with outside the female connector (30).
- 8. the detection method of the detection means of a kind of constant pressure valve according to claim 1, it is characterised in that including such as Lower step：(1) constant pressure valve valve opening ability is testedLow-pressure relief valve (48), which is opened, first is adjusted to set pressure, and then low pressure gauge (43) shows setting pressure, and then first Magnetic valve (53) is opened, and then gas enters gas receiver, and then gas receiver first sensor (54) work shows the constant pressure of pressure Power valve opening pressure scope, constant pressure valve valve opening is then tested, then constant pressure valve outlet side second sensor (59) work Make display pressure rise, then high-pressure solenoid valve (57) is opened, and is finally vented, then workpiece valve opening ability is qualified；If low pressure depressurizes Valve (48), which is opened, to be adjusted to set pressure, then low pressure gauge (43) display setting pressure, and then the first magnetic valve (53) is opened, Then gas enters gas receiver, and then gas receiver first sensor (54) work shows pressure constant pressure valve opening pressure model Enclose, then test constant pressure valve valve opening, then test constant pressure valve outlet end pressure second sensor (59) work display Pressure does not raise, and then siren sounds, then workpiece is unqualified, and cracking pressure is too high；Adjusted if low-pressure relief valve (48) is opened To setting pressure, then low pressure gauge (43) display sets pressure, and then the first magnetic valve (53) is opened, and then gas enters Gas receiver, then gas receiver first sensor (54) work show that pressure is less than constant pressure valve minimum cracking pressure, then surveyed Constant pressure valve valve opening is tried, then constant pressure valve outlet side second sensor (59) work shows pressure rise, then alarm Device sounds, then workpiece is unqualified, and cracking pressure is too low；(2) test constant pressure valve and close valve internal leakageLow-pressure relief valve (48), which is opened, first is adjusted to set pressure, low pressure gauge (43) display setting pressure, the first magnetic valve (53) open, gas enters gas receiver, and gas receiver first sensor (54) work shows pressure setting pressure, tests constant pressure Valve valve opening, constant pressure valve outlet side second sensor (59) work show pressure rise, and high-pressure solenoid valve (57) is opened, row Gas, second solenoid valve (60), which is opened, lets out gas storage cylinder pressure, and gas receiver first sensor (54) work shows that pressure is constant pressure Power valve minimum cracking pressure 90%, high-pressure solenoid valve (57) are closed, and second solenoid valve (60) is closed, and test constant pressure valve closes Valve, the 3rd magnetic valve (61) are opened, and flowmeter (63) is worked by spinner flowmeter (47) and shows flow value, and internal leakage value is being set In limits, workpiece is qualified；It is adjusted to set pressure, low pressure gauge (43) display setting pressure if low-pressure relief valve (48) is opened Power, the first magnetic valve (53) are opened, and gas enters gas receiver, and gas receiver first sensor (54) work shows pressure setting pressure Power, tests constant pressure valve valve opening, and constant pressure valve outlet side second sensor (59) work shows pressure rise, high-voltage electromagnetic Valve (57) is opened, exhaust, and second solenoid valve (60), which is opened, lets out gas storage cylinder pressure, gas receiver first sensor (54) work display Pressure is constant pressure valve minimum cracking pressure 90%, and high-pressure solenoid valve (57) is closed, and second solenoid valve (60) is closed, and test is permanent Constant-pressure valve closes valve, and the 3rd magnetic valve (61) is opened, and flowmeter (63) is worked by spinner flowmeter (47) shows flow value, interior Leakage value is in range of set value, and siren sounds, and workpiece internal leakage is exceeded unqualified；(3) constant pressure valve life test is testedMake-and-break time of the pressure test gas of 1.1 times of constant pressure valve maximum Opening pressure in constant pressure valve is set first With break-make number, then detected in constant pressure valve according to the make-and-break time of setting and break-make number, it is unqualified, report Alert prompting, it is qualified, continue test until the break-make number of setting has all been surveyed.
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| CN204213426U (en) * | 2014-09-28 | 2015-03-18 | 杭州金奥阀门制造有限公司 | Interior pressure Self-operated pressure reducing valve |
| CN204739266U (en) * | 2015-05-29 | 2015-11-04 | 夏步前 | LNG ( liquefied natural gas ) hangs down resistance automatic control check valve device |
| CN205136693U (en) * | 2015-11-02 | 2016-04-06 | 新昌县利永达制冷机械有限公司 | Constant pressure valve |
| CN205138771U (en) * | 2015-11-02 | 2016-04-06 | 新昌县利永达制冷机械有限公司 | Detection apparatus for constant pressure valve |
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| CN204213426U (en) * | 2014-09-28 | 2015-03-18 | 杭州金奥阀门制造有限公司 | Interior pressure Self-operated pressure reducing valve |
| CN204739266U (en) * | 2015-05-29 | 2015-11-04 | 夏步前 | LNG ( liquefied natural gas ) hangs down resistance automatic control check valve device |
| CN205136693U (en) * | 2015-11-02 | 2016-04-06 | 新昌县利永达制冷机械有限公司 | Constant pressure valve |
| CN205138771U (en) * | 2015-11-02 | 2016-04-06 | 新昌县利永达制冷机械有限公司 | Detection apparatus for constant pressure valve |
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| CN105352711A (en) | 2016-02-24 |
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