CN112326231B - Valve detection method and detection equipment - Google Patents
Valve detection method and detection equipment Download PDFInfo
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- CN112326231B CN112326231B CN202011234412.3A CN202011234412A CN112326231B CN 112326231 B CN112326231 B CN 112326231B CN 202011234412 A CN202011234412 A CN 202011234412A CN 112326231 B CN112326231 B CN 112326231B
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- valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/10—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting holders for tool or work
Abstract
The invention belongs to the technical field of valve detection, and relates to a valve detection method, wherein a valve to be detected is clamped through a valve clamping device on a clamping table, the method comprises the following steps of: weighing the valve to be tested to obtain valve gravity G; calculating an adjusting force F = P S corresponding to the setting pressure according to the flow passage sectional area S of the valve and the setting pressure P; calculating to obtain a clamping force according to the valve gravity G, the adjusting force F and the sealing coefficient K; the invention also provides valve detection equipment, wherein the detection device comprises a clamping table and a valve clamping device arranged on the clamping table, the clamping table comprises a clamping frame and a fixing plate arranged on the clamping frame, and the valve clamping device comprises a clamp arranged on the fixing plate and a driving device for applying and adjusting the clamping force. The valve detection method and the detection equipment provided by the invention can adjust the clamping force aiming at valves with different specifications.
Description
Technical Field
The invention belongs to the technical field of valve detection, and relates to a valve detection method and detection equipment.
Background
After the safety valve is assembled, the opening pressure value and the sealing performance of the valve need to be detected and verified. The detection is completed through valve detection equipment, and a clamping device is required to clamp the valve to be detected during the detection. Because valves have different specifications, the clamping force required for different specifications of valves is not the same. When the clamping force is too small, the valve to be detected can loosen during detection, so that the detection accuracy and the detection smoothness are influenced; when the clamping force is too high, the valve is easily damaged.
The chinese patent application CN 108195515A discloses a valve testing machine, which comprises a test board and a control system, wherein the control system is connected with the test board, and the test board is provided with a fixing frame, a vertical beam and a positioning device; the fixed frame is provided with a right clamping device and a turnover device, the right clamping device is connected with the turnover device, the vertical beam is provided with an upper sliding rail, a lower sliding rail and a cylinder, a push rod of the cylinder is connected with the movable frame, the movable frame is installed between the upper sliding rail and the lower sliding rail to slide, the movable frame is provided with a left clamping device, and the left clamping device and the right clamping device are provided with a sealing head and a clamping jaw. This patent passes through the jack catch and presss from both sides tight flange excircle, has avoided the valve to receive the influence of any external force in the test procedure, has ensured valve strength and sealing test's accuracy.
The chinese utility model patent CN 205192740U discloses a safety valve detection device, which adopts a hydraulic clamping mechanism, the hydraulic clamping mechanism comprises a clamping system and a hydraulic power system, the hydraulic power system comprises an electric hydraulic oil pump, a hydraulic oil cylinder and a push rod, the push rod is connected with a piston of the hydraulic oil cylinder, and is provided with an air hole for passing check gas, the hydraulic oil cylinder drives the push rod to move up and down under the driving of the electric hydraulic oil pump; the clamping system comprises a clamping disc, three clamping jaws and a flange type connecting disc, and a central hole is formed in the center of the clamping disc; the flange type connecting disc is used for connecting the safety valve to be detected, the bottom of the flange type connecting disc is hermetically arranged at the upper end of the ejector rod and moves along with the up-and-down movement of the ejector rod at the central hole of the clamping disc; the upper surface of the clamping disc is provided with three radial clamping jaw grooves which are uniformly distributed from a clamping disc center hole to the clamping disc edge, the cross section of each clamping jaw groove is in an inverted T shape, the bottom structures of the clamping jaws are matched with the clamping jaw groove structures and can move in the clamping jaw grooves along the clamping disc radial direction, bosses with different heights are arranged on two opposite side surfaces of each clamping jaw which are perpendicular to the clamping jaw groove direction, and the bosses with different heights are used for clamping safety valves to be detected with different heights.
The clamping force of the valve detection device cannot be adjusted, so that the valve detection device cannot adapt to different requirements of valves with different specifications on the clamping force.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a valve detection method and detection equipment, which can adjust clamping force aiming at valves with different specifications.
In order to solve the above technical problems, the object of the present invention is achieved by the following technical solutions:
a valve detection method is characterized in that a valve to be detected is clamped by a valve clamping device on a clamping table, the method comprises the following steps of:
(1) Weighing the valve to be tested to obtain valve gravity G;
(2) Calculating an adjusting force F = P S corresponding to the setting pressure according to the flow passage sectional area S of the valve and the setting pressure P;
(3) And calculating to obtain the clamping force according to the valve gravity G, the adjusting force F and the sealing coefficient K.
In the valve detection method, different valves have inherent valve gravity G, flow passage sectional area S, set pressure P and sealing coefficient K, so that the clamping force required by the valves can be calculated. When the flow channel is circular, the cross-sectional area of the flow channel can be calculated according to the throat diameter (diameter of the flow channel) of the valve to be detected.
In the above valve detection method, the clamping mode of the valve to be detected is an upper-jacking type or a lower-jacking type, the upper-jacking type clamping applies an upward acting force to the valve through the valve clamping device, and the lower-jacking type clamping applies a downward acting force to the valve through the valve clamping device; when the clamping mode is the top-up mode, the clamping force in the step (3) is equal to K (G + F), and when the clamping mode is the bottom-down mode, the clamping force in the step (3) is equal to K G-F.
In the above valve detection method, the weighing of the valve to be detected in step (1) is performed by a sensor arranged on the clamping table, and the sensor is a weighing sensor or a force sensor.
In the above valve detection method, the adjustment of the clamping force is completed through a hydraulic cylinder or an air cylinder, the clamping force is increased when the hydraulic cylinder or the air cylinder is pressurized, the hydraulic cylinder is connected with a hydraulic pump station, the air cylinder is connected with an air source, the clamping force is detected through a sensor arranged on the hydraulic cylinder or the air cylinder, and the sensor is a weighing sensor or a force sensor.
In the above valve detecting method, the calculating process of the clamping force is completed by a calculating program in a control system, and the control system is electrically connected with a sensor for detecting data. Of course, the clamping force may also be calculated manually.
In the above valve detection method, the pressurization action of the hydraulic cylinder or the air cylinder is controlled by a PLC or a single chip microcomputer in the control system, and the pressure relief action of the hydraulic cylinder or the air cylinder is controlled by a PLC or a single chip microcomputer or a manual pressure relief valve in the control system.
The invention also provides valve detection equipment, wherein the detection device comprises a clamping table and a valve clamping device arranged on the clamping table, the clamping table comprises a clamping frame and a fixing plate arranged on the clamping frame, and the valve clamping device comprises a clamp arranged on the fixing plate and a driving device for applying and adjusting the clamping force.
In the valve detection equipment, the lower end surface of the clamp is in contact connection with the flange surface of the valve to be detected, and the driving device drives the valve to be detected upwards to clamp the valve to be detected or drives the clamp downwards to clamp the valve to be detected.
In one of the valve testing apparatus described above, the clamp may be in the form of any clamp known in the art, such as a jaw clamp or a lever clamp.
In the above valve detection device, the detection device further includes a sensor for detecting gravity of the valve to be detected, a sensor for detecting the clamping force, and a control system, the control system includes a calculation program for calculating the clamping force, and a PLC or a single chip for controlling the driving device, and the control system is controlled by a computer.
Compared with the prior art, the invention has the following beneficial effects:
1. the optimal clamping force required by the valve to be tested is calculated according to the gravity G, the flow passage sectional area S, the setting pressure P and the sealing coefficient K of the valve to be tested, so that the valve to be tested can be reliably clamped, and the damage to the valve to be tested caused by overlarge clamping force is avoided.
2. The valve detection equipment provided by the invention has the advantages of simple structure, convenience in operation and adjustment, and can meet the detection requirements of valves with various specifications.
Drawings
FIG. 1 is a perspective view of a first embodiment of the present invention;
FIG. 2 is a front view of a first embodiment of the present invention;
FIG. 3 is a perspective view of a second embodiment of the present invention;
FIG. 4 is a front view of a second embodiment of the present invention;
FIG. 5 is a perspective view of a third embodiment of the present invention;
FIG. 6 is a front view of a third embodiment of the present invention;
FIG. 7 is a perspective view of a fourth embodiment of the present invention;
FIG. 8 is a front view of a fourth embodiment of the present invention;
reference numerals: 1. a clamping frame; 2. a fixing plate; 3. a clamp; 4. a drive device; 5. a valve to be tested; 6. a sensor.
Detailed Description
The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings, see fig. 1-8:
example one Top-Up valve detecting apparatus
The upward valve detection device comprises a clamping table, a valve clamping device and a control system, wherein the valve clamping device and the control system are arranged on the clamping table, the clamping table comprises a clamping frame 1 and a fixing plate 2 arranged on the clamping frame 1, and the valve clamping device comprises a plurality of clamps 3 uniformly arranged on the fixing plate 2 and a driving device 4 for applying and adjusting the clamping force. The clamping frame 1 is a rectangular frame and comprises an upper frame and a lower frame, and four sensors 6 for weighing the valve 5 to be measured are arranged between the upper frame and the lower frame; the clamp 3 is a claw type clamp 3, a radial sliding groove is formed in the fixing plate 2, and the claw type clamp 3 is slidably arranged in the sliding groove; the clamping frame 1 is internally and fixedly provided with a mounting plate, the bottom of the driving device 4 is arranged on the mounting plate, a piston rod is vertically upward, the upper end of the piston rod is connected with a top rod, the top rod is in abutting connection with the bottom end of a valve 5 to be tested through a gasket, and a sensor 6 for detecting clamping force is arranged between the top rod and the piston rod; the control system comprises a calculation program for calculating the clamping force and a PLC or a single chip microcomputer for controlling the driving device 4, and is controlled by a computer.
The driving device 4 is a hydraulic cylinder or an air cylinder, the clamping force is increased when the hydraulic cylinder or the air cylinder is pressurized, the hydraulic cylinder is connected with a hydraulic pump station, the air cylinder is connected with an air source, the pressurizing action of the hydraulic cylinder or the air cylinder is controlled by a PLC or a single chip microcomputer, and the pressure relief action of the hydraulic cylinder or the air cylinder is controlled by the PLC or the single chip microcomputer or a manual pressure relief valve.
The clamping process of the upper-jacking type valve detection device is as follows: placing the valve 5 to be tested on the fixing plate 2 and weighing, moving the jaw type clamp 3 to enable the valve 5 to be tested to be located above the flange face of the valve 5 to be tested, then controlling a hydraulic pump station or an air source to inject oil or gas into the driving device 4, enabling a piston rod of the driving device 4 to slowly move upwards, driving the valve 5 to be tested to move upwards through an ejector rod, and enabling the flange face to abut against the jaw type clamp 3 and gradually clamp the valve. When the clamping force is detected to reach the required clamping force, controlling a hydraulic pump station or an air source to stop, and keeping the clamping force; when the clamping force is smaller than the value of the required clamping force, controlling a hydraulic pump station or an air source to be started to supplement the clamping force until the value of the required clamping force is reached, and stopping; and after the measurement of the valve 5 to be measured is finished, controlling the hydraulic pump station or the air source to perform pressure relief action, and stopping after the clamping force is slowly reduced.
Second embodiment first pressing type valve detecting device
The downward pressing type valve detection device comprises a clamping table, a valve clamping device and a control system, wherein the valve clamping device and the control system are arranged on the clamping table, the clamping table comprises a clamping frame 1 and a fixing plate 2 arranged on the clamping frame 1, and the valve clamping device comprises a plurality of clamps 3 evenly arranged on the fixing plate 2 and a driving device 4 for applying and adjusting the clamping force. The clamping frame 1 is a rectangular frame and comprises an upper frame and a lower frame, and four sensors 6 for weighing the valve 5 to be measured are arranged between the upper frame and the lower frame; the clamp 3 is a clamping jaw type clamp 3 and is arranged in an axial mounting hole of the fixed plate 2 in a sliding manner through a sliding rod, and a moving plate is fixed at the lower end of the sliding rod; the driving device 4 is vertically arranged in the clamping frame 1, a piston rod is vertically downward, the lower end of the piston rod is connected with the movable plate, the upper end of the driving device 4 is connected with a top rod, the top rod is in abutting connection with the bottom end of the valve 5 to be tested through a gasket, and a sensor 6 for detecting clamping force is arranged between the top rod and the driving device 4; the control system comprises a calculation program for calculating the clamping force and a PLC or a single chip microcomputer for controlling the driving device 4, and is controlled by a computer.
The driving device 4 is a hydraulic cylinder or an air cylinder, the clamping force is increased when the hydraulic cylinder or the air cylinder is pressurized, the hydraulic cylinder is connected with a hydraulic pump station, the air cylinder is connected with an air source, the pressurizing action of the hydraulic cylinder or the air cylinder is controlled by a PLC or a single chip microcomputer, and the pressure relief action of the hydraulic cylinder or the air cylinder is controlled by the PLC or the single chip microcomputer or a manual pressure relief valve.
The clamping process of the upper-jacking type valve detection device is as follows: the valve 5 to be measured is placed on the fixing plate 2 and weighed, the jaw type clamp is rotated to be located above the flange face of the valve 5 to be measured, then a hydraulic pump station or an air source is controlled to inject oil or gas into the driving device 4, a piston rod of the driving device 4 slowly moves downwards to drive the moving plate to move downwards, the jaw type clamp 3 moves downwards along with the piston rod, and the jaw type clamp 3 abuts against the flange face and is gradually clamped. When the clamping force is detected to reach the required clamping force, controlling a hydraulic pump station or an air source to stop, and keeping the clamping force; when the clamping force is smaller than the value of the required clamping force, controlling a hydraulic pump station or an air source to be started to supplement the clamping force until the value of the required clamping force is reached, and stopping; and after the measurement of the valve 5 to be measured is finished, controlling the hydraulic pump station or the air source to perform pressure relief action, and stopping after the clamping force is slowly reduced.
Third embodiment second push-down type valve detecting device
The downward pressing type valve detection device comprises a clamping table, a valve clamping device and a control system, wherein the valve clamping device and the control system are arranged on the clamping table, the clamping table comprises a clamping frame 1 and a fixing plate 2 arranged on the clamping frame 1, and the valve clamping device comprises a plurality of clamps 3 uniformly arranged on the fixing plate 2 and a driving device 4 for applying and adjusting a clamping force. The clamping frame 1 is a rectangular frame and comprises an upper frame and a lower frame, and four sensors 6 for weighing the valve 5 to be measured are arranged between the upper frame and the lower frame; the fixture 3 is a lever type fixture 3 and is hinged on the mounting seat, the fixing plate 2 is provided with a radial sliding groove, and the mounting seat is slidably arranged in the sliding groove; the driving device 4 is vertically arranged on the mounting seat, a piston rod is vertically upward, one end of the lever type clamp 3 is hinged with the piston rod, the other end of the lever type clamp is tightly pressed on a flange surface of the valve 5 to be tested, the fixed plate 2 is in abutting connection with the bottom end of the valve 5 to be tested through a gasket, and a sensor 6 for detecting clamping force is arranged between the fixed plate 2 and the gasket; the control system comprises a calculation program for calculating the clamping force and a PLC or a single chip microcomputer for controlling the driving device 4, and is controlled by a computer.
The driving device 4 is a hydraulic cylinder or an air cylinder, the clamping force is increased when the hydraulic cylinder or the air cylinder is pressurized, the hydraulic cylinder is connected with a hydraulic pump station, the air cylinder is connected with an air source, the pressurizing action of the hydraulic cylinder or the air cylinder is controlled by a PLC or a single chip microcomputer, and the pressure relief action of the hydraulic cylinder or the air cylinder is controlled by the PLC or the single chip microcomputer or a manual pressure relief valve.
The clamping process of the upper-jacking type valve detection device is as follows: the valve 5 to be measured is placed on the fixing plate 2 and weighed, the lever-type clamp 3 is moved to be located above the flange face of the valve 5 to be measured, then a hydraulic pump station or an air source is controlled to inject oil or gas into the driving device 4, a piston rod of the driving device 4 moves upwards slowly to drive the lever-type clamp 3 to rotate around a hinge point, and the lever-type clamp 3 abuts against the flange face and is clamped gradually. When the clamping force is detected to reach the required clamping force, controlling a hydraulic pump station or an air source to stop, and keeping the clamping force; when the clamping force is smaller than the value of the required clamping force, controlling a hydraulic pump station or an air source to be started, supplementing the clamping force, and stopping until the value of the required clamping force is reached; and after the measurement of the valve 5 to be measured is finished, controlling the hydraulic pump station or the air source to perform pressure relief action, and stopping after the clamping force is slowly reduced.
Example four push-down valve check out test set three
The second embodiment is substantially the same as the second embodiment, except that: the clamping frame 1 is a whole, a sensor 6 for weighing the valve 5 to be measured is not arranged, and the sensor 6 between the fixing plate 2 and the gasket is used for weighing the valve 5 to be measured.
Example five Top-up valve Clamp force calculation
The diameter of a flow passage of the valve 5 to be tested is 32mm, the setting pressure is 1Mpa, the sealing coefficient is 1.5, the valve 5 to be tested is weighed, and the gravity G is 980N;
calculating the adjusting force F =1 (pi/4) 32 2 ＝804(N)；
The clamping force 1.5 (++ 804) =2676 (N) is calculated.
Example six calculation of clamping force for push-down valve
The diameter of a flow passage of the valve 5 to be tested is 32mm, the setting pressure is 1Mpa, the sealing coefficient is 1.5, the valve 5 to be tested is weighed, and the gravity G is 980N;
calculating the adjusting force F =1 (pi/4) 32 2 ＝804(N)；
The clamping force is calculated to be 1.5 | -980-804 | -264 (N).
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.
Claims (6)
1. A valve detection method is characterized in that a valve to be detected is clamped through a valve clamping device on a clamping table, the method comprises the step of adjusting the clamping force of the valve to be detected, and the method comprises the following steps:
(1) Weighing the valve to be tested to obtain valve gravity G;
(2) Calculating an adjusting force F = P S corresponding to the setting pressure according to the flow passage sectional area S of the valve and the setting pressure P;
(3) And calculating to obtain the clamping force according to the valve gravity G, the adjusting force F and the sealing coefficient K.
2. The valve detection method according to claim 1, wherein the valve to be detected is clamped in an upward-pushing manner or a downward-pushing manner, the upward-pushing type clamping applies upward acting force to the valve through the valve clamping device, and the downward-pushing type clamping applies downward acting force to the valve through the valve clamping device; when the clamping mode is the top-up mode, the clamping force in the step (3) is equal to K (G + F), and when the clamping mode is the down-down mode, the clamping force in the step (3) is equal to K I G-F I.
3. The valve detecting method according to claim 1, wherein the weighing of the valve to be detected in step (1) is performed by a sensor disposed on the clamping table, and the sensor is a load cell or a force sensor.
4. The valve detection method according to claim 1, wherein the clamping force is adjusted by a hydraulic cylinder or an air cylinder, the clamping force is increased when the hydraulic cylinder or the air cylinder is pressurized, the hydraulic cylinder is connected with a hydraulic pump station, the air cylinder is connected with an air source, the clamping force is detected by a sensor arranged on the hydraulic cylinder or the air cylinder, and the sensor is a weighing sensor or a force sensor.
5. The method of claim 1, wherein the clamping force is calculated by a controller, and the controller is electrically connected to a sensor for detecting data.
6. The valve detection method according to claim 4, wherein the pressurization action of the hydraulic cylinder or the air cylinder is controlled by a PLC or a single chip microcomputer, and the pressure relief action of the hydraulic cylinder or the air cylinder is controlled by the PLC or the single chip microcomputer or a manual pressure relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234412.3A CN112326231B (en) | 2020-11-07 | 2020-11-07 | Valve detection method and detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234412.3A CN112326231B (en) | 2020-11-07 | 2020-11-07 | Valve detection method and detection equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN112326231A CN112326231A (en) | 2021-02-05 |
| CN112326231B true CN112326231B (en) | 2022-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011234412.3A Active CN112326231B (en) | 2020-11-07 | 2020-11-07 | Valve detection method and detection equipment |
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| CN (1) | CN112326231B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942004A (en) * | 1988-11-01 | 1990-07-17 | Cincinnati Milacron Inc. | Method and apparatus for regulating mold clamping force in an injection molding machine |
| US5149471A (en) * | 1991-06-17 | 1992-09-22 | Cincinnati Milacron Inc. | Clamp force control |
| CN204346658U (en) * | 2015-01-26 | 2015-05-20 | 国家气动产品质量监督检验中心 | Cylinder impermeability device for fast detecting |
| CN105922254A (en) * | 2016-07-04 | 2016-09-07 | 四川东巨自动化科技有限公司 | Electric clamping jaw |
| CN206905983U (en) * | 2017-05-26 | 2018-01-19 | 中山市优梦自动化设备有限公司 | Pressure-reducing valve air-tightness detection device |
| CN108801575B (en) * | 2018-04-29 | 2020-03-24 | 长庆石油勘探局技术监测中心 | Hydraulic drive type clamping special-shaped valve bursting pressure testing method |
| CN208860592U (en) * | 2018-08-16 | 2019-05-14 | 保定市华沃电力设备厂 | A kind of valve testboard bidirectional clamping mechanism |
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2020
- 2020-11-07 CN CN202011234412.3A patent/CN112326231B/en active Active
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