CN109269796B - Zero-pressure valve testing device and testing method - Google Patents
Zero-pressure valve testing device and testing method Download PDFInfo
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- CN109269796B CN109269796B CN201811253556.6A CN201811253556A CN109269796B CN 109269796 B CN109269796 B CN 109269796B CN 201811253556 A CN201811253556 A CN 201811253556A CN 109269796 B CN109269796 B CN 109269796B
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- 239000003570 air Substances 0.000 description 65
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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
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Abstract
The invention discloses a zero-pressure valve testing device and a zero-pressure valve testing method. The fan inlet pipe department of fan frock is equipped with the reducing pipe, and the reducing pipe is through giving vent to anger straight tube connection clamping frock, and the export frock board that is located clamping frock one side is opened and is had the through-hole as the exit channel, and exit channel one end links to each other with giving vent to anger straight tube, and the other end is equipped with the export gasket. The other side of the clamping tool is provided with a tested valve, the tested valve moves along a positioning groove on a tested valve supporting plate until the tested valve contacts and seals with an outlet gasket, the rear of the tested valve is provided with a pressing cylinder, and a cylinder rod of the pressing cylinder acts to enable the pressing rod to press the tested valve. The inlet tooling plate of the sealing tooling is provided with an inlet channel which is used as an inlet gasket, one side of the inlet tooling plate is provided with a push-forward cylinder, the push-forward cylinder pushes the inlet tooling plate to slide close to the tested valve so that the inlet gasket contacts and seals the tested valve, and the inlet channel is connected with an air source tooling through an arc hose. The invention has high automation degree, convenient operation and accurate data.
Description
Technical Field
The invention belongs to the field of testing of gas flow control regulators, and particularly relates to a zero pressure valve testing device and method.
Background
The zero-pressure valve is a gas flow control regulator for a combustion system and is used with a proportional mixer, an internal mixing burner, positive and negative furnace pressures, and the like. The zero pressure valve is internally provided with a film type and an automatic offset type reverse spring, the second air pressure measurement is controlled, and the second air pressure measurement is equal to the ambient air pressure of the equipment through the ambient air pressure inlet and the pressure regulating valve, so that the flow regulation is realized. At present, a manual clamping mode is used in many enterprises, and data are recorded by manually observing a mechanical pressure gauge, so that the operation is complex, the test beat is slow, and the data consistency is poor. Therefore, the testing device with high automation degree, quick test and accurate data is developed and designed, and is an effective way for meeting the market demand of the zero-pressure valve test.
Disclosure of Invention
In order to solve the defects in the prior art, the zero-pressure valve control and adjustment test has high automation degree, quick test and accurate data, and the invention provides a zero-pressure valve test device and a zero-pressure valve test method.
The technical scheme adopted by the invention is as follows:
1. zero pressure valve testing device
The device comprises a fan tool, a clamping tool, a sealing tool and a gas source tool which are sequentially arranged along a straight line, wherein the fan tool is connected with the clamping tool through a gas outlet straight pipe, a tested valve is arranged on the clamping tool, one side of the tested valve is connected with the sealing tool, and the sealing tool is connected with the gas source tool through an arc hose.
The fan frock is equipped with the extension tuber pipe that communicates with the fan air outlet including fixing the fan on fan support base in one side of fan, installs the anemoscope on the extension tuber pipe, and the opposite side of fan is equipped with the entry pipe, and the entry pipe has connected gradually reducing pipe and loudspeaker suction inlet along self axis direction, and the diameter of reducing pipe middle section part is less than the diameter at reducing pipe both ends, and reducing pipe makes reducing pipe three way structure in the minimum lower extreme trompil of diameter department, reducing pipe in lower extreme trompil department with give vent to anger connecting pipe and connecting bend intercommunication in proper order, connecting bend and give vent to anger the straight tube and be connected.
The clamping tool comprises an outlet tool plate, a tested valve and a pressing cylinder, wherein the outlet tool plate, the tested valve and the pressing cylinder are arranged on a clamping tool bottom plate, a supporting frame is arranged on one side of the outlet tool plate, the outlet tool plate is vertically fixed to a position, close to a fan tool, on the clamping tool bottom plate through the supporting frame, a first pressure sensor is arranged at the upper end of the outlet tool plate through a first pressure sensor mounting joint, a through hole is formed in the thickness direction of the outlet tool plate to serve as an outlet channel, one end of the outlet channel is connected with an air outlet straight pipe, and an annular outlet gasket is arranged at the other end of the outlet channel. The other side of the outlet tooling plate is provided with a tested valve, the tested valve is arranged on a tested valve supporting plate, the tested valve supporting plate is provided with a positioning groove matched and assembled with the bottom of the tested valve, and the tested valve is arranged on the tested valve supporting plate and then moves transversely along the positioning groove until one end of the tested valve is contacted and sealed with the outlet gasket. The rear of the tested valve is provided with a lower pressing cylinder, the lower pressing cylinder is fixed on the clamping tool bottom plate through a supporting piece, a cylinder rod of the lower pressing cylinder vertically penetrates through the lower pressing supporting plate to extend towards the clamping tool bottom plate, the extending end of the cylinder rod is provided with a lower pressing rod which is horizontally arranged forward, and the cylinder rod of the lower pressing cylinder continuously extends to enable the lower pressing rod to press the tested valve.
The sealing tool comprises an inlet tool plate and a forward pushing cylinder which are arranged on a sealing tool bottom plate, a guide rail is arranged on one side, close to the clamping tool, of the sealing tool bottom plate, and the lower end of the inlet tool plate slides on the guide rail through a sliding block. One side of the inlet tooling plate is provided with a forward pushing cylinder, a cylinder rod of the forward pushing cylinder is connected with the lower part of the inlet tooling plate, the cylinder rod of the forward pushing cylinder stretches out to push the inlet tooling plate to slide on the guide rail, the cylinder rod end of the forward pushing cylinder is provided with a forward pushing cylinder fixing plate perpendicular to the sealing tooling bottom plate, and the forward pushing cylinder is fixed on the sealing tooling bottom plate through the forward pushing cylinder fixing plate. The upper end of the inlet tooling plate is provided with a second pressure sensor through a second pressure sensor mounting joint, the inlet tooling plate is provided with an inlet channel which is coaxial with the outlet channel of the clamping tooling along the thickness direction, one end of the inlet channel is provided with an annular inlet gasket, the front pushing cylinder pushes the inlet tooling plate to slide on the guide rail in the direction close to the valve to be tested, the inlet gasket is in contact with and seals the other end of the valve to be tested, and the other end of the inlet channel is connected with an arc hose.
The air source tool comprises an air passage bottom plate, a first-stage pressure regulating valve, a flowmeter and a second-stage pressure regulating valve, wherein an air passage support frame is fixed on the air passage bottom plate through an air passage bottom plate support block, the first-stage pressure regulating valve, the flowmeter and the second-stage pressure regulating valve are sequentially arranged on the air passage support frame at intervals along a straight line, one end of the second-stage pressure regulating valve is connected with the small-diameter end of the reducing pipe, the large-diameter end of the reducing pipe is connected with the arc-shaped hose, the other end of the second-stage pressure regulating valve is connected with one end of the flowmeter through a second air pipe, the other end of the flowmeter is connected with one end of the first-stage pressure regulating valve through a first air pipe, the other end of the first-stage pressure regulating valve is connected to an air inlet pipe, and test air enters the arc-shaped hose through the first air pipe, the second air pipe and the reducing pipe sequentially.
Preferably, the fan is fixed on a fan mounting frame, the fan mounting frame is mounted on a fan supporting plate, and the fan supporting plate is fixed on the fan supporting base through a plurality of fan supporting columns.
Preferably, the valve supporting plate to be tested is fixed on the clamping tool bottom plate through the supporting block.
Preferably, the support piece comprises a pressing support plate and pressing support legs, the pressing cylinder is fixed on the pressing support plate, and the pressing support plate is fixed on the clamping tool bottom plate through the pressing support legs which are symmetrically arranged.
Preferably, the primary pressure regulating valve is fixed on the air passage support frame through a first connecting block, the flowmeter is fixed on the air passage support frame through a second connecting block, and the secondary pressure regulating valve is fixed on the air passage support frame through a third connecting block.
2. A zero pressure valve testing method comprising the steps of:
1) Mounting and positioning the valve to be tested on a valve support plate to be tested;
2) The cylinder rod of the pressing cylinder of the clamping tool acts to enable the pressing rod to press the valve to be tested;
3) The front pushing cylinder of the sealing tool pushes forwards to drive the inlet tool plate to slide along the guide rail to approach the valve to be tested, the inlet tool plate drives the valve to be tested to move towards the outlet tool plate, and the front pushing cylinder continues to push forwards until the inlet gasket and the outlet gasket seal the two ends of the valve to be tested respectively;
4) The air source tool is provided with a first pressure sensor, a second pressure sensor, a first air source, a second air source, a first air source and a second air source, wherein the air source is connected with the first pressure sensor and the second air source through an air inlet pipe;
5) The rotating speed of the fan is changed in a PWM modulation mode, negative pressure environment is generated on the outlet side of the tested valve after gas in the fan passes through the reducing pipe, the smaller the diameter of the middle section of the reducing pipe is, the larger the negative pressure value of the tested valve is, the rotating speed of the fan is changed to further adjust the negative pressure value of the tested valve, after the internal pressure of the tested valve is changed, the internal valve port is used for adjusting the pressure, so that the flow is changed, and the flow value and the front pressure value and the back pressure value of the tested valve are recorded at regular time by the equipment;
6) The control system generates a test curve, automatically judges, then closes the air source, stops the actuation of the pressing cylinder and the forward pushing cylinder, and ends the test.
In the step 1), the valve to be tested is preferably accurately positioned and mounted on the valve supporting plate to be tested through the positioning groove.
In step 4), the test gas is preferably reduced to 3kpa after the pressure is regulated by the primary pressure regulating valve and the secondary pressure regulating valve.
The invention is provided with the testing device consisting of the fan tool, the clamping tool, the sealing tool and the air source tool, and the tools of all parts are matched for use by the actuation of the air cylinder, so that the automation of the control, adjustment and testing of the zero pressure valve is realized.
The invention has the beneficial effects that:
1) The device has high automation degree, replaces the existing manual clamping, and is convenient to operate;
2) Automatic air intake and automatic data recording, and quick test beat;
3) The high-precision electronic sensor is adopted, the data is accurate, and the consistency is good.
Drawings
FIG. 1 is a front view of the present test device;
FIG. 2 is a schematic diagram of a fan tooling;
FIG. 3 is a schematic diagram of a clamping tool;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a partial side view of FIG. 3;
FIG. 6 is a schematic diagram of a seal tooling;
FIG. 7 is a schematic diagram of an air supply tooling.
In the figure: anemometer 2, extension duct 3, fan 4, inlet pipe 5, reducing pipe 6, fan mounting bracket 7, fan support plate 8, fan support column 9, fan support base 10, air outlet connection pipe 11, connection elbow 12, horn air inlet 13, air outlet straight pipe 14, first pressure sensor 15, outlet gasket 16, outlet tooling plate 17, positioning groove 18, clamping tooling bottom plate 19, lower pressure cylinder 20, lower pressure support plate 21, lower pressure support foot 22, inlet gasket 23, inlet tooling plate 24, guide rail 25, arc hose 26, forward pushing cylinder 27, sealing tooling bottom plate 28, reducing pipe 29, second pressure regulating valve, 30, support block, 31, primary pressure regulating valve, 32, flowmeter, 33, air path support frame, 34, air path bottom plate, 35, first air pipe, 36, second air pipe, 37, air inlet pipe, 38, lower pressure rod, 39, support frame, 40, slider, 41, second pressure sensor mounting joint, 42, measured valve, 43, air path bottom plate support block, 44, forward pushing cylinder fixing plate, 45, first connecting block, 46, second connecting block, 47, third connecting block, 48, fan tooling, 49, clamping tooling, 50, sealing tooling, 51, air source tooling, 52, second pressure sensor, 53, first pressure sensor mounting joint, 54, measured valve support plate.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the invention comprises a fan tool 48, a clamping tool 49, a sealing tool 50 and a gas source tool 51 which are sequentially arranged along a straight line, wherein the fan tool 48 is connected with the clamping tool 49 through a gas outlet straight pipe 13, a tested valve 42 is arranged on the clamping tool 49, the right side of the tested valve 42 is connected with the sealing tool 50, and the sealing tool 50 is connected with the gas source tool 51 through an arc hose 25.
As shown in fig. 2, the fan tooling 48 comprises a fan 3, the fan 3 is fixed on a fan mounting frame 6, the fan mounting frame 6 is fixed on a fan supporting plate 7, four fan supporting columns 8 which are distributed in square four points are arranged at the lower end of the fan supporting plate 7, and the fan supporting columns are connected with a fan supporting base 9. The left side of fan 3 is equipped with the square short straight extension tuber pipe 2 that communicates with fan 3 air outlet, install anemograph 1 on the extension tuber pipe 2, circular shape entry pipe 4 is installed on the right side of fan 3, entry pipe 4 has connected gradually reducing pipe 5 and loudspeaker inlet scoop 12 along self axis direction, reducing pipe 5 middle section part's diameter is less than reducing pipe 5 both ends's diameter, reducing pipe 5 is the tee bend structure in the minimum lower extreme trompil of department of diameter makes reducing pipe 5, reducing pipe 5 communicates with the connecting return bend 11 of the connecting pipe 10 and big turning radian of giving vent to anger in proper order in lower extreme trompil department, connecting return bend 11 is connected with the straight pipe 13 of giving vent to anger.
As shown in fig. 3 and 4, the clamping fixture 49 includes an outlet fixture plate 16, a valve to be tested 42 and a pressing cylinder 19 mounted on the clamping fixture bottom plate 18, the outlet fixture plate 16 is vertically fixed to the clamping fixture bottom plate 18 by two right-angle supporting frames 39, and the two supporting frames 39 are uniformly distributed on the left side of the outlet fixture plate 16 in a front-back arrangement.
The upper end of the outlet tooling plate 16 is provided with a first pressure sensor 14 through a first pressure sensor mounting joint 53, the outlet tooling plate 16 is provided with a through hole along the thickness direction as an outlet channel, the left end of the outlet channel is connected with the air outlet straight pipe 13, and the right end of the outlet channel is provided with an annular outlet gasket 15.
The valve under test 42 is mounted on the valve under test support plate 54, the valve under test support plate 54 is provided with a positioning groove 17 fitted with the bottom of the valve under test 42, as shown in fig. 4, the positioning groove 17 does not penetrate the valve under test support plate 54, the valve under test 42 is mounted on the valve under test support plate 54 and moves left and right along the positioning groove 17, and the valve under test 42 moves left along the positioning groove 17 so that the left end of the valve under test 42 is sealed by the outlet gasket 15.
The tested valve supporting plate 54 is fixed on the clamping tool bottom plate 18 through four supporting blocks 30 which are distributed in square four points, the lower pressing cylinder 19 is installed right behind the tested valve 42, the lower pressing cylinder 19 is fixed on the lower pressing supporting plate 20, the lower pressing supporting plate 20 is fixed on the clamping tool bottom plate 18 through two symmetrically arranged lower pressing supporting feet 21, a cylinder rod of the lower pressing cylinder 19 vertically penetrates through the lower pressing supporting plate 20 to extend towards the clamping tool bottom plate 18, a lower pressing rod 38 which is horizontally arranged forwards is arranged at the extending end of the cylinder rod, and the cylinder rod of the lower pressing cylinder 19 continuously extends to enable the lower pressing rod 38 to press the tested valve 42.
As shown in fig. 5, the angle between the cylinder rod of the pressing cylinder 19 and the pressing rod 38 is a right angle, and the pressing rod 38 is fixed to the cylinder rod end by a tripod extending form.
As shown in fig. 6, the sealing tool 50 comprises an inlet tool plate 23 and a forward pushing cylinder 26 which are mounted on a sealing tool bottom plate 27, a guide rail 24 is arranged on one side, close to a clamping tool 49, of the sealing tool bottom plate 27, and the lower end of the inlet tool plate 23 slides on the guide rail 24 through a sliding block 40.
One side of the inlet tooling plate 23 is provided with a forward pushing cylinder 26, a cylinder rod of the forward pushing cylinder 26 is connected with the lower part of the inlet tooling plate 23, the cylinder rod of the forward pushing cylinder 26 stretches out to push the inlet tooling plate 23 to slide on the guide rail 24 towards the direction close to the tested valve 42, the cylinder rod end of the forward pushing cylinder 26 is provided with a forward pushing cylinder fixing plate 44 perpendicular to the sealing tooling bottom plate 27, the forward pushing cylinder 26 is mounted on the forward pushing cylinder fixing plate 44, and the forward pushing cylinder 26 is connected with the bottom of the inlet tooling plate 23.
The upper end of the inlet tooling plate 23 is vertically provided with a second pressure sensor 52 through a second pressure sensor mounting joint 41, the inlet tooling plate 23 is provided with an inlet channel which is coaxial with the outlet channel of the clamping tooling 49 along the thickness direction, one end of the inlet channel is provided with an annular inlet gasket 22, the inlet gasket 22 and the outlet gasket 15 of the clamping tooling 49 are used for sealing two ends of the valve 42 to be tested, and the other end of the inlet channel is connected with an arc hose 25.
As shown in fig. 7, the air source tooling 51 includes an air channel bottom plate 34, a primary pressure regulating valve 31, a flowmeter 32 and a secondary pressure regulating valve 29, wherein an air channel support frame 33 is fixed on the air channel bottom plate 34 through two air channel bottom plate support blocks 43 distributed left and right, the air channel support frame 33 is sequentially provided with the primary pressure regulating valve 31, the flowmeter 32 and the secondary pressure regulating valve 29 along a straight line at intervals, one end of the secondary pressure regulating valve 29 is connected with the small diameter end of a reducing pipe 28, the large diameter end of the reducing pipe 28 is connected with an arc-shaped hose 25, the other end of the secondary pressure regulating valve 29 is connected with one end of the flowmeter 32 through a connecting second air pipe 36, the other end of the flowmeter 32 is connected with one end of the primary pressure regulating valve 31 through a first air pipe 35, the other end of the primary pressure regulating valve 31 is connected to an air inlet pipe 37, and test air enters the arc-shaped hose 25 through the first air inlet pipe 35, the second air pipe 36 and the reducing pipe 28 sequentially.
The primary pressure regulating valve 31 is fixed to the air passage support frame 33 through a first connecting block 45, the flow meter 32 is fixed to the air passage support frame 33 through a second connecting block 46, and the secondary pressure regulating valve 29 is fixed to the air passage support frame 33 through a third connecting block 47.
The specific implementation working process of the device is as follows:
1) The valve 42 to be measured is mounted on the valve supporting plate 54 to be measured and is accurately positioned by the positioning groove 17;
2) The cylinder rod of the pressing cylinder 19 of the clamping tool 49 moves downwards to drive the pressing rod 38 to press the valve 42 to be tested;
3) The forward pushing cylinder 26 of the sealing tool 50 pushes forward to drive the inlet tool plate 23 to slide along the guide rail 24 towards the valve 42 to be tested, and after the inlet tool plate 23 contacts the valve 42 to be tested, the valve 42 to be tested is driven to move towards the outlet tool plate 16, and the forward pushing cylinder 26 continues to push forward until the inlet gasket 22 and the outlet gasket 15 respectively seal the two ends of the valve 42 to be tested;
4) The air source tool 51 is filled with test air through the air inlet pipe 37, the test air is reduced to about 3kpa after being regulated by the primary pressure regulating valve 31 and the secondary pressure regulating valve 29, and then the numerical values of the flowmeter 32, the first pressure sensor 14 and the second pressure sensor 52 are monitored in real time;
5) The rotating speed of the fan 3 is changed in a PWM modulation mode, negative pressure environment is generated at the outlet side of the tested valve 42 after the air in the fan 3 passes through the reducing pipe 5, the smaller the diameter of the middle section of the reducing pipe 5 is, the larger the negative pressure value of the tested valve 42 is, the negative pressure value of the tested valve 42 is adjusted by changing the rotating speed of the fan 3, after the internal pressure of the tested valve 42 is changed, the internal valve port automatically adjusts the pressure, so that the flow is changed, and the flow value and the front and rear pressure values of the tested valve 42 are recorded at regular time by equipment;
6) The control system automatically generates a test curve, automatically makes a judgment, then closes the air source, stops the actuation of the pushing cylinder 19 and the pushing cylinder 26, and ends the test.
The implementation process can be used for completing the accurate test of the zero-pressure valve, and the zero-pressure valve is convenient to operate, high in automation degree and good in data accuracy and consistency.
Claims (6)
1. The utility model provides a zero pressure valve testing arrangement which characterized in that: the device comprises a fan tool (48), a clamping tool (49), a sealing tool (50) and an air source tool (51) which are sequentially arranged along a straight line, wherein the fan tool (48) is connected with the clamping tool (49) through an air outlet straight pipe (13), a tested valve (42) is arranged on the clamping tool (49), one side of the tested valve (42) is connected with the sealing tool (50), and the sealing tool (50) is connected with the air source tool (51) through an arc hose (25);
the fan tool (48) comprises a fan (3) fixed on a fan supporting base (9), an extension air pipe (2) communicated with an air outlet of the fan (3) is arranged on one side of the fan (3), an anemometer (1) is installed on the extension air pipe (2), an inlet pipe (4) is arranged on the other side of the fan (3), the inlet pipe (4) is sequentially connected with a reducing pipe (5) and a horn air suction opening (12) along the axis direction of the inlet pipe, the diameter of the middle section part of the reducing pipe (5) is smaller than the diameter of two ends of the reducing pipe (5), the lower end of the reducing pipe (5) at the position with the minimum diameter is provided with a hole so that the reducing pipe (5) is of a three-way structure, the reducing pipe (5) is sequentially communicated with an air outlet connecting pipe (10) and a connecting elbow (11) at the position with the hole at the lower end, and the connecting elbow (11) is connected with an air outlet straight pipe (13);
the clamping tool (49) comprises an outlet tool plate (16), a tested valve (42) and a pressing cylinder (19) which are arranged on a clamping tool bottom plate (18), a support frame (39) is arranged on one side of the outlet tool plate (16), the outlet tool plate (16) is vertically fixed to a position, close to a fan tool (48), on the clamping tool bottom plate (18) through the support frame (39), a first pressure sensor (14) is arranged at the upper end of the outlet tool plate (16) through a first pressure sensor mounting joint (53), a through hole is formed in the thickness direction of the outlet tool plate (16) and used as an outlet channel, one end of the outlet channel is connected with an air outlet straight pipe (13), and an annular outlet gasket (15) is arranged at the other end of the outlet channel; the other side of the outlet tooling plate (16) is provided with a tested valve (42), the tested valve (42) is arranged on a tested valve supporting plate (54), the tested valve supporting plate (54) is provided with a positioning groove (17) matched and assembled with the bottom of the tested valve (42), the tested valve (42) is arranged on the tested valve supporting plate (54) and then transversely moves along the positioning groove (17) until one end of the tested valve (42) is in contact with and sealed with an outlet gasket (15), the rear of the tested valve (42) is provided with a pressing cylinder (19), the pressing cylinder (19) is fixed on a clamping tooling bottom plate (18) through a supporting piece, a cylinder rod of the pressing cylinder (19) vertically penetrates through the pressing supporting plate (20) to extend towards the clamping tooling bottom plate (18), and the extending end of the cylinder rod is provided with a pressing rod (38) which is horizontally arranged forwards, and the cylinder rod of the pressing cylinder rod (19) continuously extends to enable the pressing rod (38) to press the tested valve (42);
the sealing tool (50) comprises an inlet tool plate (23) and a forward pushing cylinder (26) which are arranged on a sealing tool bottom plate (27), a guide rail (24) is arranged on one side, close to a clamping tool (49), of the sealing tool bottom plate (27), the lower end of the inlet tool plate (23) slides on the guide rail (24) through a sliding block (40), a forward pushing cylinder (26) is arranged on one side of the inlet tool plate (23), a cylinder rod of the forward pushing cylinder (26) is connected with the lower part of the inlet tool plate (23), the cylinder rod of the forward pushing cylinder (26) stretches out to push the inlet tool plate (23) to slide on the guide rail (24), a forward pushing cylinder fixing plate (44) perpendicular to the sealing tool bottom plate (27) is arranged on the cylinder rod end of the forward pushing cylinder (26), and the forward pushing cylinder (26) is fixed on the sealing tool bottom plate (27) through the forward pushing cylinder fixing plate (44); the upper end of the inlet tooling plate (23) is provided with a second pressure sensor (52) through a second pressure sensor mounting joint (41), the inlet tooling plate (23) is provided with a through hole which is used as an inlet channel along the thickness direction, the inlet channel is coaxial with an outlet channel of the clamping tooling (49), one end of the inlet channel is provided with an annular inlet gasket (22), a front pushing cylinder (26) pushes the inlet tooling plate (23) to slide on a guide rail (24) towards a direction close to a tested valve (42), the inlet gasket (22) is in contact with and seals the other end of the tested valve (42), and the other end of the inlet channel is connected with an arc hose (25);
the air source tool (51) comprises an air passage bottom plate (34), a first-stage pressure regulating valve (31), a flowmeter (32) and a second-stage pressure regulating valve (29), wherein an air passage support frame (33) is fixed on the air passage bottom plate (34) through an air passage bottom plate support block (43), the first-stage pressure regulating valve (31), the flowmeter (32) and the second-stage pressure regulating valve (29) are sequentially arranged on the air passage support frame (33) at intervals along a straight line, one end of the second-stage pressure regulating valve (29) is connected with the small diameter end of a reducing pipe (28), the large diameter end of the reducing pipe (28) is connected with an arc-shaped hose (25), the other end of the second-stage pressure regulating valve (29) is connected with one end of the flowmeter (32) through a second air pipe (36), the other end of the flowmeter (32) is connected with one end of the first air pipe (35), and the other end of the first-stage pressure regulating valve (31) is connected to an air inlet pipe (37), and test air enters the arc-shaped hose (25) sequentially through the first air pipe (35), the second air pipe (36) and the reducing pipe (28);
the fan (3) is fixed on the fan mounting frame (6), the fan mounting frame (6) is mounted on the fan supporting plate (7), and the fan supporting plate (7) is fixed on the fan supporting base (9) through a plurality of fan supporting columns (8);
the tested valve supporting plate (54) is fixed on the clamping tool bottom plate (18) through the supporting block (30).
2. A zero pressure valve testing device according to claim 1, wherein: the supporting piece comprises a pressing supporting plate (20) and pressing supporting feet (21), the pressing cylinder (19) is fixed on the pressing supporting plate (20), and the pressing supporting plate (20) is fixed on the clamping tool bottom plate (18) through the two symmetrically arranged pressing supporting feet (21).
3. A zero pressure valve testing device according to claim 2, wherein: the primary pressure regulating valve (31) is fixed on the air passage support frame (33) through a first connecting block (45), the flowmeter (32) is fixed on the air passage support frame (33) through a second connecting block (46), and the secondary pressure regulating valve (29) is fixed on the air passage support frame (33) through a third connecting block (47).
4. A zero pressure valve testing method applied to the device of any one of claims 1-3, comprising the steps of:
1) Mounting and positioning a valve under test (42) to a valve under test support plate (54);
2) The cylinder rod of a pressing cylinder (19) of the clamping tool (49) acts to enable the pressing rod (38) to press the tested valve (42);
3) A forward pushing cylinder (26) of the sealing tool (50) pushes forward to drive an inlet tool plate (23) to slide along a guide rail (24) towards a tested valve (42), the inlet tool plate (23) drives the tested valve (42) to move towards an outlet tool plate (16), and the forward pushing cylinder (26) continues to push forward until an inlet gasket (22) and an outlet gasket (15) seal two ends of the tested valve (42) respectively;
4) The air source tool (51) is filled with test air through an air inlet pipe (37), the pressure of the test air is reduced after being regulated by a primary pressure regulating valve (31) and a secondary pressure regulating valve (29), and then the numerical values of a flowmeter (32), a first pressure sensor (14) and a second pressure sensor (52) are monitored in real time;
5) The rotating speed of the fan (3) is changed in a PWM modulation mode, negative pressure environment is generated at the outlet side of the tested valve (42) after gas in the fan (3) passes through the reducing pipe (5), the smaller the diameter of the middle section of the reducing pipe (5) is, the larger the negative pressure value of the tested valve (42) is, the rotating speed of the fan (3) is changed to further adjust the negative pressure value of the tested valve (42), after the internal pressure of the tested valve (42) is changed, the internal valve port is used for adjusting the pressure, so that the flow is changed, and the flow value and the front and back pressure values of the tested valve (42) are recorded at fixed time by the equipment;
6) The control system generates a test curve, automatically makes judgment, then closes the air source, stops the actuation of the pushing cylinder (26) and the pushing cylinder (19), and ends the test.
5. A zero pressure valve testing method according to claim 4, wherein:
in the step 1), the valve (42) to be tested is accurately positioned and mounted on the valve supporting plate (54) to be tested through the positioning groove (17).
6. A zero pressure valve testing method according to claim 5, wherein:
in the step 4), the test gas is reduced to 3kpa after being regulated by a primary pressure regulating valve (31) and a secondary pressure regulating valve (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253556.6A CN109269796B (en) | 2018-10-25 | 2018-10-25 | Zero-pressure valve testing device and testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253556.6A CN109269796B (en) | 2018-10-25 | 2018-10-25 | Zero-pressure valve testing device and testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109269796A CN109269796A (en) | 2019-01-25 |
| CN109269796B true CN109269796B (en) | 2023-10-24 |
Family
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Family Applications (1)
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| CN201811253556.6A Active CN109269796B (en) | 2018-10-25 | 2018-10-25 | Zero-pressure valve testing device and testing method |
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| CN114689311B (en) * | 2022-03-16 | 2022-12-20 | 杭州中溯智能科技有限公司 | Automatic testing method for proportional valve |
| CN115575105B (en) * | 2022-09-23 | 2023-09-01 | 河南省锅炉压力容器安全检测研究院 | Pressure-bearing testing device of pressure valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205067065U (en) * | 2015-09-22 | 2016-03-02 | 江苏美大电器有限公司 | Gas cooking utensils surge damping valve flow test device |
| CN205843942U (en) * | 2016-07-13 | 2016-12-28 | 上海市特种设备监督检验技术研究院 | A kind of multistation pressure regulator valve fatigue machine |
| CN205958244U (en) * | 2016-07-28 | 2017-02-15 | 煤炭科学技术研究院有限公司 | Super large flow relief valve test device |
| CN208833501U (en) * | 2018-10-25 | 2019-05-07 | 哈尔滨工程大学 | A kind of zero-pressure valve test device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205067065U (en) * | 2015-09-22 | 2016-03-02 | 江苏美大电器有限公司 | Gas cooking utensils surge damping valve flow test device |
| CN205843942U (en) * | 2016-07-13 | 2016-12-28 | 上海市特种设备监督检验技术研究院 | A kind of multistation pressure regulator valve fatigue machine |
| CN205958244U (en) * | 2016-07-28 | 2017-02-15 | 煤炭科学技术研究院有限公司 | Super large flow relief valve test device |
| CN208833501U (en) * | 2018-10-25 | 2019-05-07 | 哈尔滨工程大学 | A kind of zero-pressure valve test device |
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