CN212807605U - Pilot valve performance test device - Google Patents
Pilot valve performance test device Download PDFInfo
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- CN212807605U CN212807605U CN202021651291.8U CN202021651291U CN212807605U CN 212807605 U CN212807605 U CN 212807605U CN 202021651291 U CN202021651291 U CN 202021651291U CN 212807605 U CN212807605 U CN 212807605U
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Abstract
The utility model discloses a pilot valve performance test device aims at solving the pilot valve performance test equipment and drops into big, the inconvenient not enough of operation. The utility model discloses an including installing the test bench on the pressure testing bench, be equipped with the gas storage cavity in the test bench, the last intercommunication air supply pipe of pressure testing bench to the gas storage cavity, be equipped with the mount pad on the test bench, be used for installing the support of pilot valve, be equipped with air inlet, gas outlet, gas vent on the pilot valve, be equipped with the chamber of ventilating that is used for simulating the main valve air chamber on the mount pad, the last manometer of installing of chamber of ventilating, be connected the intake pipe between air inlet and the gas storage cavity, communicate the outlet duct between gas outlet. The pilot valve performance test device has the advantages of simple structure, low cost and convenient operation.
Description
Technical Field
The utility model relates to a valve test device, more specifically say, it relates to a pilot valve performance test device.
Background
The pilot operated safety valve consists of a pilot valve and a main valve, wherein the performance of the pilot valve plays a decisive role in the performance of the whole pilot operated safety valve. In the process of product development and mass production assembly, poor valve performance or valve failure is sometimes encountered, and the main valve or the pilot valve cannot be determined in the first time. The main reason is that a professional testing device is lacked, and the performance test of the pilot valve and the main valve cannot be carried out in time. At present, the performance test of the pilot valve and the main valve is generally carried out by a large-sized safety valve performance test device, the equipment investment is large, the operation is inconvenient, and the performance of the pilot valve cannot be truly reflected.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes pilot valve performance test equipment drops into big, the inconvenient not enough of operation, provides a pilot valve performance test device, and pilot valve performance test device simple structure is with low costs, convenient operation.
In order to solve the technical problem, the utility model discloses a following technical scheme: the pilot valve performance test device comprises a test seat installed on a pressure test table, wherein a gas storage cavity is arranged in the test seat, the pressure test table is communicated with a gas supply pipe to the gas storage cavity, a mounting seat and a support used for mounting a pilot valve are arranged on the test seat, a gas inlet, a gas outlet and a gas exhaust port are arranged on the pilot valve, a ventilation cavity used for simulating a main valve gas chamber is arranged on the mounting seat, a pressure gauge is installed on the ventilation cavity, a gas inlet pipe is connected between the gas inlet and the gas storage cavity, and a gas outlet pipe is communicated between the gas.
When the pilot valve performance testing device is used for testing, the method comprises the following steps: a. installing a pilot valve to be tested on a support, connecting an air inlet pipe between an air inlet of the pilot valve and an air storage cavity, and communicating an air outlet pipe between an air outlet of the pilot valve and a ventilation cavity; b. the pressure test table supplies gas into the gas storage cavity through the gas supply pipe, the pressure in the gas storage cavity is continuously increased, when the pressure is increased to the setting pressure of the pilot valve, the pilot valve is heard or felt by touch to exhaust, and the pressure gauge connected to the ventilation cavity detects that the pressure is obviously reduced, which indicates that the pilot valve is opened at the moment; judging the fault of the pilot valve when the pilot valve which is regulating the setting pressure can not be regulated to the specified starting pressure all the time, judging the fault of the pilot valve when the pilot valve which is regulating the setting pressure is not started at the specified pressure, slowly releasing the pressure of a pressure test table after the pilot valve is started, and returning the pilot valve to the seat when the pressure in the ventilation cavity detected by a pressure gauge is consistent with the air supply pressure of the pressure test table; if the pilot valve recoil pressure is adjustable, the pressure of the pressure test table is reduced to the target pressure, the recoil pressure of the pilot valve is adjusted, and when the pressure in the ventilation cavity detected by the pressure gauge is consistent with the air supply pressure of the pressure test table, the pilot valve is recoated. The pilot valve testing device can be used for testing by means of the production test bed, is simple in structure and low in cost, does not need a large amount of air, ensures that the air in the air storage cavity is enough to complete the action process of the whole pilot valve, and is simple and convenient in the whole test operation process.
Preferably, the vent cavity is provided with a vent valve. The vent valve is convenient for venting the vent cavity, so that the pilot valve does not need to be opened every time when the recoil pressure is measured for multiple times.
Preferably, a sealing disc is tightly arranged between the pressure test table and the test seat, and sealing rings are arranged between the upper surface of the sealing disc and the test seat and between the lower surface of the sealing disc and the pressure test table. The sealing performance of the test seat connected with the pressure test table is improved by the sealing disc.
Preferably, the air inlet pipe is a hose. The hose is flexible and convenient to use.
Preferably, the support is in an L-shaped structure, and is connected to the edge position of the upper end of the test seat. The L-shaped support facilitates the installation of the pilot valve.
Preferably, the test seat is provided with a mounting port, the mounting port is tightly connected with the connecting seat, a plurality of outer sliding holes are uniformly distributed in the connecting seat, outer piston rods are mounted in the outer sliding holes in a matched mode, one end of each outer piston rod is provided with a positioning flange, the other end of each outer piston rod is provided with a butt joint head, a butt joint spring is mounted between each butt joint head and the outer surface of the connecting seat, the positioning flanges are butted on the inner surface of the connecting seat, a rotating ring is mounted on the test seat, a plurality of arc-shaped pushing strips are uniformly distributed on the end face of each rotating ring facing the outer piston rod, the end face of each pushing strip is obliquely arranged from one end to the other end, and the pushing strips rotate along with.
The rotating ring rotates, the end face of the pushing strip slides through the abutting joint on the outer piston rod to push the outer piston rod to the gas storage cavity, the outer piston rod returns under the action of the abutting spring, so that fluctuating air pressure is generated in the gas storage cavity, the working condition of fluctuating air pressure is simulated, and even if the instantaneous pressure of the tempering type pilot valve is higher than the setting pressure of the pilot valve, the pilot valve cannot exhaust; the pilot valve can exhaust when the instantaneous pressure of the sudden-opening pilot valve is higher than the setting pressure of the pilot valve, so that the sudden-opening pilot valve continuously jumps to exhaust due to fluctuating air pressure. The working performance of the pilot valve in a fluctuating air pressure state is simulated through the arrangement of the structure, and the pilot valve can not be quickly opened for exhausting even if the instant pressure of the tempering type pilot valve is higher than the setting pressure of the pilot valve; the sudden-open type pilot valve can be quickly opened for exhausting when the instantaneous pressure of the sudden-open type pilot valve is higher than the setting pressure of the pilot valve, so that the sudden-open type pilot valve continuously jumps for exhausting by fluctuating air pressure. The performance of the mass-exchange type and abrupt-opening type pilot valves under the working condition of fluctuating air pressure is well tested.
Preferably, a plurality of inner sliding holes are uniformly distributed in the connecting seat, an inner piston rod is installed in the inner sliding holes in a matched mode, a positioning convex ring is arranged at one end of the inner piston rod, a pushing head is arranged at the other end of the inner piston rod, a positioning spring is installed between the pushing head and the outer surface of the connecting seat, the positioning convex ring is abutted to the inner surface of the connecting seat, an adjusting ring capable of sliding axially is installed in the rotating ring, the adjusting ring is connected with an adjusting piston cylinder telescopic rod, a plurality of arc-shaped pushing guide bars are uniformly distributed on the end face, facing the inner piston rod, of the adjusting ring, the end face of each pushing guide bar is obliquely arranged from one end to the other end, the rotating ring drives the adjusting ring to rotate synchronously, and the pushing.
The adjusting piston cylinder is adjusted to push the adjusting ring to move axially, the end face of the adjusting ring is separated from and reunion with the pushing head at the end part of the inner piston rod, when the end face of the adjusting ring is contacted and attached with the pushing head at the end part of the inner piston rod, the rotating ring drives the adjusting ring to rotate synchronously, the pushing guide bar rotates along with the adjusting ring, so that the end face of the pushing guide bar slides over the pushing head on the inner piston rod to push the inner piston rod to the air storage cavity, after the pushing guide bar slides away from the pushing head, the inner piston rod returns under the action of the positioning spring, air pressure in the air storage cavity is further fluctuated, the air pressure fluctuation range is enlarged.
Preferably, the connecting base is provided with a mounting hole, the mounting hole is matched with and provided with a booster piston column, the sectional area of the outer piston rod and the sectional area of the inner piston rod are both smaller than that of the booster piston column, one end of the booster piston column is connected with a positioning convex ring, the other end of the booster piston column is connected with a telescopic rod of the booster piston cylinder, and the positioning convex ring abuts against the inner surface of the connecting base.
The boosting piston cylinder pushes the boosting piston column to move into the gas storage cavity, the pressure in the gas storage cavity is continuously increased, when the pressure is increased to the setting pressure of the pilot valve, the pilot valve exhausts gas, and the pressure gauge connected to the ventilation cavity detects that the pressure is obviously reduced; and when the pressure detected by the pressure gauge before the pilot valve exhausts is not in the setting pressure range of the pilot valve, determining that the pilot valve is in fault. The structure makes the pressure in the gas storage cavity rise slowly, so that the pressure gauge can read the pressure value at the moment before the pilot valve starts to exhaust.
Compared with the prior art, the beneficial effects of the utility model are that: (1) the pilot valve test device can be tested by the medium output test bed, the structure is simple, the cost is low, a large amount of air is not needed, the air in the air storage cavity is enough to complete the action process of the whole pilot valve, and the whole test operation process is simple and convenient; (2) the performance of the quality-control type and abrupt-opening type pilot valves under the condition of fluctuating air pressure is well tested by simulating the condition of fluctuating air pressure.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of embodiment 2 of the present invention;
fig. 3 is a partially enlarged schematic view of fig. 2 of the present invention;
in the figure: 1. pressure test table, 2, test seat, 3, gas storage cavity, 4, gas supply pipe, 5, pressure taking joint, 6, mounting seat, 7, support, 8, gas inlet, 9, gas outlet, 10, gas outlet, 11, ventilation cavity, 12, pressure gauge, 13, gas inlet pipe, 14, gas outlet pipe, 15, exhaust valve, 16, sealing disc, 17, mounting opening, 18, connecting seat, 19, outer sliding hole, 20, outer piston rod, 21, positioning flange, 22, abutting head, 23, abutting spring, 24, rotating ring, 25, driving motor, 26, driving gear, 27, driven gear ring, 28, pushing strip, 29, check valve, 30, inner sliding hole, 31, inner piston rod, 32, positioning convex ring, 33, pushing head, 34, positioning spring, 35, adjusting ring, 36, adjusting piston cylinder, 37, connecting plate, 38, connecting rod, 39, pushing guide strip, 40, mounting hole, 41 and boosting piston column.
Detailed Description
The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:
example 1: a pilot valve performance test device (see attached figure 1) comprises a test seat 2 installed on a pressure test table 1, wherein a gas storage cavity 3 is arranged in the test seat, and a gas supply pipe 4 is communicated with the gas storage cavity on the pressure test table. The test can be carried out by means of a factory pressure test table without a large safety valve performance test device, the volume of the gas storage cavity is about 7 liters, and the action process of the whole pilot valve can be completed without a large gas amount. The test seat is provided with a pressure tapping joint 5, a mounting seat 6 and a support 7 for mounting a pilot valve, and the mounting seat is tightly connected to the upper end of the test seat. The pilot valve is provided with an air inlet 8, an air outlet 9 and an exhaust port 10, the mounting seat is provided with a ventilation cavity 11 for simulating an air chamber of the main valve, the ventilation cavity is provided with a pressure gauge 12, an air inlet pipe 13 is connected between the air inlet and the air storage cavity, and the air inlet pipe is connected to the pressure taking connector. An air outlet pipe 14 is communicated between the air outlet and the ventilation cavity. The air inlet pipe is a hose.
The vent chamber is fitted with a vent valve 15. The mounting seat is provided with three air holes communicated with the air cavity, and the exhaust pipe, the pressure gauge and the exhaust valve are respectively arranged on the three air holes. A sealing disc 16 is tightly arranged between the pressure test platform and the test seat, and sealing rings are arranged between the upper surface of the sealing disc and the test seat and between the lower surface of the sealing disc and the pressure test platform. The support is L-shaped structure, and the support is connected at the edge position of the upper end of the test seat. The pilot valve is detachably arranged on the support through a bolt.
When the pilot valve performance testing device is used for testing, the method comprises the following steps: a. installing a pilot valve to be tested on a support, connecting an air inlet pipe between an air inlet of the pilot valve and an air storage cavity, and communicating an air outlet pipe between an air outlet of the pilot valve and a ventilation cavity; checking the air tightness of the pipeline to ensure that the pipeline is airtight; b. the pressure test table supplies gas into the gas storage cavity through the gas supply pipe, the pressure in the gas storage cavity is continuously increased, when the pressure is increased to the setting pressure of the pilot valve, the pilot valve is heard or felt by touch to exhaust, and the pressure gauge connected to the ventilation cavity detects that the pressure is obviously reduced, which indicates that the pilot valve is opened at the moment; judging the fault of the pilot valve when the pilot valve which is regulating the setting pressure can not be regulated to the specified starting pressure all the time, judging the fault of the pilot valve when the pilot valve which is regulating the setting pressure is not started at the specified pressure, slowly releasing the pressure of a pressure test table after the pilot valve is started, and returning the pilot valve to the seat when the pressure in the ventilation cavity detected by a pressure gauge is consistent with the air supply pressure of the pressure test table; if the pilot valve recoil pressure is adjustable, the pressure of the pressure test table is reduced to a target pressure, the target pressure guides the recoil pressure value to which the valve wants to adjust, the recoil pressure of the pilot valve is adjusted, and when the pressure in the ventilation cavity detected by the pressure gauge is consistent with the air supply pressure of the pressure test table, the pilot valve is recocked.
Example 2: the utility model provides a pilot valve performance test device (see fig. 2, fig. 3), its structure is similar with embodiment 1, the main difference lies in being equipped with installing port 17 on the test bench in this embodiment, the installing port position zonulae occludens has connecting seat 18, the equipartition is equipped with a plurality of outer slide holes 19 on the connecting seat, outer piston rod 20 is installed to outer slide hole adaptation, outer piston rod one end is equipped with locating flange 21, the other end is equipped with butt head 22, install butt spring 23 between butt head and the connecting seat surface, locating flange butt is on the connecting seat internal surface, install swivel ring 24 on the test bench, connect the bearing between swivel ring and the test bench, install driving motor 25 on the test bench, install driving gear 26 on the driving motor output shaft, be equipped with driven ring gear 27 on the swivel ring outer wall, driving gear. The rotating ring is provided with a plurality of arc-shaped pushing strips 28 towards the end face of the outer piston rod, the end faces of the pushing strips are arranged from one end to the other end in an inclined mode, and the pushing strips rotate along with the rotating ring to enable the end faces of the pushing strips to slide over the abutting heads on the outer piston rod to push the outer piston rod to the air storage cavity. A check valve 29 is installed in the supply pipe.
A plurality of inner sliding holes 30 are uniformly distributed on the connecting seat, inner piston rods 31 are installed in the inner sliding holes in a matched mode, one end of each inner piston rod is provided with a positioning convex ring 32, the other end of each inner piston rod is provided with a pushing head 33, a positioning spring 34 is installed between the pushing head and the outer surface of the connecting seat, the positioning convex rings are abutted to the inner surface of the connecting seat, an adjusting ring 35 capable of axially sliding is installed in a rotating ring, positioning convex strips are arranged on the outer wall of the adjusting ring, sliding grooves are formed in the inner wall of. The adjusting ring is connected with an adjusting piston cylinder 36 telescopic rod, a bearing is arranged on the adjusting ring, a connecting plate 37 is arranged on the adjusting piston cylinder telescopic rod, and a plurality of connecting rods 38 are uniformly distributed and connected between the connecting plate and the bearing inner ring. The end face of the adjusting ring, facing the inner piston rod, is uniformly provided with a plurality of arc-shaped pushing guide bars 39, the end face of each pushing guide bar is obliquely arranged from one end to the other end, the rotating ring drives the adjusting ring to synchronously rotate, and the pushing guide bars rotate along with the adjusting ring to enable the end face of each pushing guide bar to slide through a pushing head on the inner piston rod to push the inner piston rod to the air storage cavity.
Be equipped with mounting hole 40 on the connecting seat, mounting hole adaptation installation booster piston post 41, the sectional area of outer piston rod's sectional area and interior piston rod all is less than the sectional area of booster piston post, and booster piston post one end is connected and is equipped with the location bulge loop, and the booster piston post other end is connected the booster piston cylinder telescopic link, and the location bulge loop butt is on the connecting seat internal surface. The other structure is the same as embodiment 1.
When the pilot valve performance testing device is used for testing, the method comprises the following steps: a. installing a pilot valve to be tested on a support, connecting an air inlet pipe between an air inlet of the pilot valve and an air storage cavity, and communicating an air outlet pipe between an air outlet of the pilot valve and a ventilation cavity; b. the pressure test table supplies air into the air storage cavity through the air supply pipe, so that the pressure in the air storage cavity is slightly lower than the setting pressure of the pilot valve, and the pressure test table stops supplying air into the air storage cavity; c, the rotating ring rotates to push the end face of the pushing bar to slide through the abutting joint on the outer piston rod to push the outer piston rod to the gas storage cavity, the outer piston rod returns under the action of the abutting spring to generate fluctuating air pressure in the gas storage cavity, the working condition of the fluctuating air pressure is simulated, and even if the instantaneous pressure of the tempering type pilot valve is higher than the setting pressure of the pilot valve, the pilot valve cannot be quickly opened for exhausting; the pilot valve can be quickly opened for exhausting when the instantaneous pressure of the suddenly-opened pilot valve is higher than the setting pressure of the pilot valve, so that the suddenly-opened pilot valve continuously jumps for exhausting by fluctuating air pressure; d. the rotating ring stops rotating, the booster piston column is pushed by the booster piston cylinder to move into the gas storage cavity, the pressure in the gas storage cavity is continuously increased, when the pressure is increased to the setting pressure of the pilot valve, the pilot valve is heard or felt by touch to exhaust, and the pressure gauge connected to the ventilation cavity detects that the pressure is obviously reduced, which indicates that the pilot valve is opened at the moment; determining that the pilot valve fails when the pilot valve which is adjusting the setting pressure cannot be adjusted to the specified opening pressure, and determining that the pilot valve fails when the pilot valve which is adjusting the setting pressure is not opened at the specified pressure; e. after the pilot valve is started, the pressure test table slowly releases pressure, and when the pressure in the vent cavity detected by the pressure gauge is consistent with the air supply pressure of the pressure test table, the pilot valve returns to the seat; if the pilot valve recoil pressure is adjustable, the pressure of the pressure test table is reduced to a target pressure, the target pressure guides the recoil pressure value to which the valve wants to adjust, the recoil pressure of the pilot valve is adjusted, and when the pressure in the ventilation cavity detected by the pressure gauge is consistent with the air supply pressure of the pressure test table, the pilot valve is recocked.
The above-described embodiments are merely preferred and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The pilot valve performance test device is characterized by comprising a test seat arranged on a pressure test table, wherein a gas storage cavity is arranged in the test seat, the pressure test table is communicated with a gas supply pipe to the gas storage cavity, the test seat is provided with a mounting seat and a support used for mounting a pilot valve, the pilot valve is provided with a gas inlet, a gas outlet and a gas exhaust port, the mounting seat is provided with a ventilation cavity used for simulating a main valve gas chamber, a pressure gauge is arranged on the ventilation cavity, a gas inlet pipe is connected between the gas inlet and the gas storage cavity, and a gas outlet pipe is communicated between the.
2. The pilot valve performance testing apparatus of claim 1, wherein the vent chamber is fitted with an exhaust valve.
3. The pilot valve performance testing device of claim 1, wherein a sealing disk is tightly arranged between the pressure test stand and the test seat, and sealing rings are arranged between the upper surface of the sealing disk and the test seat and between the lower surface of the sealing disk and the pressure test stand.
4. The pilot valve performance testing apparatus of claim 1, wherein the inlet tube is a flexible tube.
5. The pilot valve performance testing apparatus of claim 1, wherein the support is L-shaped and is attached to the upper end of the test socket at a peripheral location.
6. The pilot valve performance testing device of claim 1, wherein the testing seat is provided with a mounting opening, the mounting opening is closely connected with the connecting seat, the connecting seat is uniformly provided with a plurality of outer sliding holes, the outer sliding holes are adapted to be provided with outer piston rods, one end of each outer piston rod is provided with a positioning flange, the other end of each outer piston rod is provided with an abutting head, an abutting spring is arranged between the abutting head and the outer surface of the connecting seat, the positioning flange abuts against the inner surface of the connecting seat, the testing seat is provided with a rotating ring, the rotating ring is uniformly provided with a plurality of arc-shaped pushing strips towards the end surface of the outer piston rod, the end surface of each pushing strip is obliquely arranged from one end to the other end, and the pushing strips rotate along with the rotating ring to enable the end surface.
7. The pilot valve performance testing device of claim 6, wherein the connecting seat is uniformly provided with a plurality of inner sliding holes, the inner sliding holes are adapted to the inner piston rods, one end of each inner piston rod is provided with a positioning convex ring, the other end of each inner piston rod is provided with a pushing head, a positioning spring is arranged between each pushing head and the outer surface of the connecting seat, the positioning convex rings abut against the inner surface of the connecting seat, an adjusting ring capable of axially sliding is arranged in each rotating ring, the adjusting ring is connected with an adjusting piston cylinder telescopic rod, a plurality of arc-shaped pushing guide bars are uniformly arranged on the end surface of each adjusting ring facing the inner piston rod, the end surfaces of the pushing guide bars are obliquely arranged from one end to the other end, the rotating rings drive the adjusting rings to synchronously rotate, and the pushing guide bars rotate along with the adjusting rings to enable.
8. The pilot valve performance testing device of claim 6, wherein the connecting seat is provided with a mounting hole, the mounting hole is adapted to mount a booster piston post, the cross-sectional area of the outer piston rod and the cross-sectional area of the inner piston rod are both smaller than the cross-sectional area of the booster piston post, one end of the booster piston post is connected with a positioning convex ring, the other end of the booster piston post is connected with a telescopic rod of the booster piston post, and the positioning convex ring abuts against the inner surface of the connecting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021651291.8U CN212807605U (en) | 2020-08-10 | 2020-08-10 | Pilot valve performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021651291.8U CN212807605U (en) | 2020-08-10 | 2020-08-10 | Pilot valve performance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212807605U true CN212807605U (en) | 2021-03-26 |
Family
ID=75082341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021651291.8U Active CN212807605U (en) | 2020-08-10 | 2020-08-10 | Pilot valve performance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212807605U (en) |
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2020
- 2020-08-10 CN CN202021651291.8U patent/CN212807605U/en active Active
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