CN117054075A - Lifting mechanism for valve test and application method thereof - Google Patents
Lifting mechanism for valve test and application method thereof Download PDFInfo
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- CN117054075A CN117054075A CN202310859342.8A CN202310859342A CN117054075A CN 117054075 A CN117054075 A CN 117054075A CN 202310859342 A CN202310859342 A CN 202310859342A CN 117054075 A CN117054075 A CN 117054075A
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- valve rod
- auxiliary measuring
- lifting mechanism
- rod
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- 230000007246 mechanism Effects 0.000 title claims abstract description 79
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000008093 supporting effect Effects 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a lifting mechanism for valve test and a using method thereof, relates to the field of valves, and in particular relates to a lifting mechanism for valve test and a using method thereof, wherein a valve rod is an important moving part in a valve, and the lifting mechanism is equipment for controlling the movement and measurement of the valve rod. One end of the valve rod is sequentially connected with an auxiliary measuring block for auxiliary measuring vibration, a flexible connecting mechanism for isolating radial force of the valve rod, a tension pressure sensor for measuring tensile force and a driving mechanism along the axis of the valve rod, and the driving mechanism is fixed on the valve shell by a supporting frame.
Description
Technical Field
The invention relates to the field of valves, in particular to a lifting mechanism for valve tests and a using method thereof.
Background
The valve is main equipment for load regulation and turn-off in the power industry, and the operation of the valve is often that the equipment deviates from the rated working condition and needs to be regulated or the system is disconnected from an air source when a certain abnormality occurs, so that the stable operation of the valve directly influences the utilization efficiency of energy sources and even relates to the operation safety of the whole system.
In the actual operation regulation process, the valve is too big under some regulation working conditions, can arouse the collision wearing and tearing between sound, and vapor seal wearing and tearing can arouse the leakage of gas, and valve rod vibration also can lead to system movement unstable, and valve rod vibration is because valve dish displacement causes, and valve dish displacement's change makes the valve flow area change, and then makes the flow and the pressure that pass constantly change, leads to system control precision low.
The valve rod system is a long rod system, the axial strength is relatively high, the radial strength is very low, the radial vibration can affect the safety of the valve rod, when the vibration is further increased, certain damage can be caused to the valve rod, and even the valve rod is broken when serious, so that the whole system is paralyzed.
The condition of the valve in each system is different, the constraint of the valve rod, the medium, the flow rate, the inlet and outlet pressure and other parameters can influence the vibration of the valve, the actual valve operating environment is different, and the quality of the vibration performance is difficult to judge. The test bed can carry out related tests under the same conditions to judge the vibration performance of the valve design.
The invention provides a valve rod lifting test system capable of monitoring valve rod vibration and lifting force in real time, which can judge each performance of a valve under the same condition and verify the design quality.
Disclosure of Invention
The invention aims at: in order to solve the problems, a lifting mechanism for valve test and a using method thereof are provided.
The technical scheme adopted by the invention is as follows:
a lifting mechanism for valve test, includes the valve, and the valve includes the valve rod of control valve opening and shutting, and valve rod one end has connected gradually vibration sensor, is used for isolating the flexible coupling mechanism, the pressure sensor that draw and actuating mechanism of valve rod radial force along the valve rod axis, and actuating mechanism is provided with the support frame that makes actuating mechanism can stabilize the lift valve rod.
Further, including auxiliary measuring block, auxiliary measuring block department is provided with vibration sensor, and auxiliary measuring block one end is connected with flexible coupling mechanism, and the other end detachable is connected with the valve rod.
Further, the driving mechanism is provided with a displacement sensor for measuring the lifting height of the valve rod.
Further, the auxiliary measuring block comprises a plurality of models and is used for matching valve rods with different diameters; the auxiliary measuring blocks of various models have the same external dimensions.
Further, the flexible connection mechanism is arranged as a knuckle bearing.
Further, the support frame includes backup pad, lower backup pad and supporting screw, and last backup pad can dismantle with actuating mechanism shell and be connected, and lower backup pad can dismantle with the valve body and be connected, and last backup pad passes through supporting screw with lower backup pad and is connected, but stable lift valve rod when making actuating mechanism operation.
Further, the support screw is provided with a fine adjustment nut for adjusting the height of the support frame.
Further, the driving mechanism comprises a motor and a connecting rod driven by the motor, and the connecting rod is connected with a tension pressure sensor.
Further, a method of using a lifting mechanism for valve testing, comprising the steps of:
s1: the support frame is connected with the motor shell and the valve to be detected, the motor connecting rod is connected with the tension pressure sensor, and the tension pressure sensor is connected with the knuckle bearing;
s2: the joint bearing is connected with an auxiliary measuring block matched with a valve rod of the valve to be detected, and a vibration sensor is arranged at the auxiliary measuring block;
s3: the height of the support frame is adjusted through the fine adjustment nut, and the auxiliary measuring block is connected with the valve rod;
s4: after connection, confirming that the device axis from the motor to the valve rod overlaps with the axis of the valve rod;
s5: under the actual use situation of the valve, the lift of the valve is controlled by adjusting the lifting of the valve rod through a motor;
s6: recording valve lift through a displacement sensor, and data of a vibration sensor and a pull pressure sensor at the moment;
s7: and determining the performance of the valve according to the recorded data of the inlet and outlet pressure ratio, the lift, the flow, the vibration and the pulling pressure.
Further, after the above steps are finished, when the valve of other types needs to be measured continuously, the support frame is disassembled and mounted on a new valve to be measured, and the auxiliary measuring block matched with the valve rod of the new valve to be measured is replaced.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
the invention adopts a simple technical scheme, the method is simple to operate and high in feasibility, and discloses the valve rod lifting mechanism suitable for valve tests, the running stability of the valve can be judged in the tests, the stable running range of the valve is measured, and data support is provided for valve type selection. The valve can also be applied to the actual valve operation process, and through real-time monitoring vibration and lifting force signals, an alarm and maintenance signal is sent out when the abnormality possibly occurs to the adjusting system, so that the valve is convenient to maintain, the optimal performance is ensured to be maintained in the use process, and the valve can be found in time when the abnormality occurs, so that the personal and property safety is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
the marks in the figure: the device comprises a 1-driving mechanism, a 11-motor, a 12-connecting rod, a 2-supporting frame, a 21-upper supporting plate, a 22-supporting screw, a 23-lower supporting plate, a 24-fine adjustment nut, a 31-flexible connecting mechanism, a 32-joint bearing, a 4-auxiliary measuring block, a 5-tension pressure sensor, a 6-vibration sensor, a 7-displacement sensor, an 8-valve and a 9-valve rod.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
In this embodiment, as shown in fig. 1, a lifting mechanism for valve test includes a valve 8, the valve 8 includes a valve rod 9 for controlling opening and closing of the valve 8, one end of the valve rod 9 is sequentially connected with a vibration sensor 6, a flexible connection mechanism 31 for controlling radial force of the valve rod 9, a pull pressure sensor 5 and a driving mechanism 1 along the axis of the valve rod 9, the driving mechanism 1 is provided with a supporting frame 2 for enabling the driving mechanism 1 to stably lift the valve rod 9, when the valve rod 9 rises, the valve rod 8 is opened, a channel is communicated, two ends of the channel generate unbalanced force around the valve rod due to different conditions such as medium, pressure, flow rate and the like, when a substance passes through the valve rod 8 rapidly, vibration is generated, the vibration is transmitted to the valve rod 9, and because the valve rod 9 is a long rod system, relatively high in axial strength, very low in radial strength, the radial vibration can affect safety of the valve rod 9, so in this device, the valve rod 9 is directly connected with the vibration sensor 6, and the vibration sensor 6 can directly and effectively test data such as frequency and amplitude of the valve rod 9;
further, the vibration sensor 6 is connected to the flexible connection mechanism 31, and the flexible connection mechanism 31 is provided for the purpose of: since the driving mechanism 1 is fixed relative to the valve 8 body, the vibration of the valve rod 9 in the radial direction is inhibited, when the valve rod 9 vibrates, if the fixed driving mechanism 1 is directly connected, the movement of the valve rod 9 in the radial direction is reduced, so that the vibration value detected by the vibration sensor 6 is greatly reduced; in order to reduce as much as possible the influence of the fixed structure on the upper part of the valve rod 9 on the value detected by the vibration sensor 6, a flexible connection mechanism 31 is arranged above the vibration sensor 6, which can tolerate the inconsistency of the two axes;
furthermore, the flexible connecting mechanism 31 can also prevent the vibration of the valve rod 9 from affecting the numerical value of the pull pressure sensor 5 at the rear thereof, and the valve rod 9 deviates from the original axis during the vibration, so that the pull pressure sensor 5 also deviates from the original axis, the measuring angle changes, and the tested pull pressure data deviates from the true numerical value; the arrangement of the structure has the advantages that: the influence of the vibration of the valve rod 9 on the measurement of the lifting force can be eliminated, and on the other hand, the constraint of the driving mechanism 1 on the valve rod 9 is reduced, so that the measurement result is more accurate, the interference of external force can be avoided, and the vibration quantity of the valve rod 9 is more accurately judged;
in this embodiment, the flexible connection mechanism 31 adopts the knuckle bearing 32, the knuckle bearing 32 is a spherical sliding bearing, the sliding contact surface of the knuckle bearing 32 is an inner spherical surface and an outer spherical surface, the knuckle bearing 32 can rotate and swing at any angle during movement, the knuckle bearing 32 has the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication and the like, the knuckle bearing 32 is used for the joint bearing, can bear the tensile force of the driving mechanism 1 and the vibration of the valve rod 9, effectively filters out the force of the valve rod 9 in the radial direction, ensures that the measured values of the tension pressure sensor 5 and the vibration sensor 6 are accurate, ensures that the final measured result is more accurate, can not be interfered by external force, and more accurately judges the performance of the valve 8.
Further, after the tension pressure sensor 5 is arranged on the flexible connecting mechanism 31, the tension pressure of the flexible connecting mechanism 31 after filtering radial deflection force can be accurately measured, the tension force required by the valve rod 9 to control the valve 8 to open and close can be measured by the tension pressure sensor 5, so that a tester can accurately know the tension force of the valve rod 9 required under different opening and closing degrees, and the tension pressure mechanism is provided with the advantages that: the lifting force of the valve 8 can be conveniently and rapidly measured, the measuring precision is high, and the design and model selection requirements of a matched executing mechanism of the valve 8 can be met.
Further, a support frame 2 is arranged on the driving mechanism 1, one end of the support frame 2 is connected with a shell of the driving mechanism 1, and the other end of the support frame 2 is connected with an object fixed relative to the valve 8 body, in the embodiment, the support frame is connected with the valve 8 body, when the driving mechanism 1 drives the valve rod 9, the relative movement between the driving mechanism 1 and the valve 8 body is prevented, the action of driving the valve rod 9 is not achieved, and the support frame 2 is additionally arranged, so that when the driving mechanism 1 drives the valve rod 9, the valve rod 9 displaces relative to the valve 8 body, and the valve rod 9 achieves the purpose of controlling the opening and the closing of the valve 8; the support frame 2 is added, so that the integral structure can provide a certain supporting effect when being subjected to force deviating from the axis of the valve rod 9, and the core component is prevented from deviating from the axis of the valve rod 9, so that the measuring result is prevented from being influenced.
In this embodiment, as shown in fig. 1, the driving mechanism 1 is provided with a displacement sensor 7 for measuring the lifting height of the valve rod 9, the displacement sensor 7 can measure the movement stroke of the driving device, namely the lifting height of the valve rod 9, the movement stroke of the driving mechanism 1 can be intuitively obtained, the lifting height of the valve rod 9 is known, and thus the opening condition of the valve 8 is known, and the displacement sensor 7 is provided with the following advantages: the motion stroke of the driving mechanism 1 can be precisely controlled, and the opening degree of the valve 8 can be clearly recorded when the valve 8 is tested.
Example 2
In this embodiment, as shown in fig. 1, including auxiliary measuring block 4, auxiliary measuring block 4 department is provided with vibration sensor 6, and auxiliary measuring block 4 one end is connected with flexonics 31, and the other end detachable is connected with valve rod 9, and this auxiliary measuring block 4 sets up to the diameter and is greater than the cylindricality of valve rod 9 to be provided with in the bottom in valve rod 9 tip screw thread assorted screw hole, again with vibration sensor 6 setting in auxiliary measuring block 4 surface, the benefit of setting up like this lies in: the auxiliary measuring block 4 with larger diameter is adopted, and the vibration sensor 6 is arranged on the outer surface of the auxiliary measuring block, so that the distance between the vibration sensor 6 and the axis of the valve rod 9 is slightly far, the adaptability of measuring equipment is met, and the precision of the vibration sensor 6 is higher;
further, the auxiliary measuring block 4 comprises a plurality of models for matching valve rods 9 with different diameters; since the types of the valve 8 to be measured are different, the diameters and the lengths of the valve rods 9 may be different, and the auxiliary measuring block 4 is provided with a threaded hole at the bottom matched with the valve rod 9 of the valve 8 to be measured, so that the auxiliary measuring block 4 needs to comprise various types;
further, the external dimensions of the auxiliary measuring blocks 4 with various models are the same; the auxiliary measuring block 4 is adopted, so that the vibration sensor 6 is positioned at a position deviating from the axis of the valve rod 9, and therefore, under the condition of different diameters of the valve rod 9, although the auxiliary measuring block 4 with threaded holes at the bottoms of different diameters is adopted, consistency of test control is required to be ensured, and the control variable only changes the model of the valve 8, so that the outer surface dimensions of the auxiliary measuring block 4 are set to be the same, and the distance between the vibration sensor 6 and the axis of the valve 8 is ensured to be the same under the condition of different models of the valve 8.
Example 3
In this embodiment, as shown in fig. 1, the support frame 2 includes an upper support plate 21, a lower support plate 23 and a support screw 22, the upper support plate 21 is detachably connected with the housing of the driving mechanism 1, the lower support plate 23 is detachably connected with the body of the valve 8, the upper support plate 21 and the lower support plate 23 are connected through the support screw 22, so that the valve rod 9 can be stably lifted when the driving mechanism 1 operates, the number of the support screws 22 is 4, so that sufficient operation space can be ensured, and sufficient supporting force can be provided;
further, the support screw 22 is provided with a fine adjustment nut 24 for adjusting the height of the support frame 2, and the fine adjustment nut 24 is arranged at the position where the lower end of the support screw 22 is connected with the lower support plate 23, so that the support frame 2 can be finely adjusted in height when being in butt joint with the valve rod 9, and the support frame 2 is ensured to be connected and fastened with the valve 8.
In this embodiment, as shown in fig. 1, the driving mechanism 1 includes a motor 11 and a connecting rod 12 driven by the motor 11, and the connecting rod 12 is connected with a tension-pressure sensor 5, so that the following benefits are provided: the motion stroke of the driving mechanism 1 can be intuitively observed, and the lift of the valve rod 9 can be more accurately measured by combining the data of the displacement sensor 7.
A method of using a lifting mechanism for valve testing, comprising the steps of:
s1: the supporting plate is connected with the shell of the driving mechanism 1 through bolts, the lower supporting plate 23 is connected with the valve 8 body through bolts, the upper supporting plate 21 is connected with the lower supporting plate 23 through supporting screws 22, the connecting rod 12 of the motor 11 is connected with the tension pressure sensor 5, and the tension pressure sensor 5 is connected with the knuckle bearing 32;
s2: selecting an auxiliary measuring block 4 matched with a valve rod 9 of a valve 8 to be detected, connecting the auxiliary measuring block 4 of the knuckle bearing 32 through bolts, and installing a vibration sensor 6 at the auxiliary measuring block 4;
s3: after the driving mechanism 1 is in the initial position, the valve 8 is preferably in the initial position when being fully opened, the valve rod 9 is relatively stable, the height of the supporting frame 2 is adjusted through the fine adjustment nut 24, and the auxiliary measuring block 4 is connected with the valve rod 9;
s4: after connection, it is confirmed that the device axis from the motor 11 to the valve stem 9 overlaps with the axis of the valve stem 9; the accuracy of each item of data among the devices is ensured;
s5: in the actual use situation of the valve 8, for example, when high-pressure air is used, the motor 11 is used for adjusting the lifting of the valve rod 9 to control the lift of the valve 8;
s6: recording the lift of the valve 8 by the displacement sensor 7, and the data of the vibration sensor 6 and the pull pressure sensor 5 at the moment; under different lifts, the valve rod 9 of the valve 8 is different in vibration due to different opening and closing degrees, and various vibration and pulling pressure data are recorded and used for calculating and evaluating the performance of the valve with new design;
s7: according to the recorded lift, vibration and pulling pressure data, the performance of the valve 8 is calculated, evaluated and determined, and whether the valve can stably and effectively operate under the situation is ensured, so that the final purpose is achieved.
The foregoing description of the preferred embodiment of the invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. Lifting mechanism for valve test, comprising a valve (8), characterized in that: the valve (8) comprises a valve rod (9) for controlling the valve (8) to open and close, one end of the valve rod (9) is sequentially connected with an auxiliary measuring block (4) along the axis of the valve rod (9) and used for isolating a flexible connecting mechanism (31) for radially vibrating the valve rod (9), a tension pressure sensor (5) and a driving mechanism (1), and the driving mechanism (1) is provided with a supporting frame (2) for enabling the driving mechanism (1) to stably lift the valve rod (9).
2. A lifting mechanism for valve testing as claimed in claim 1, wherein: the driving mechanism (1) is provided with a displacement sensor (7) for measuring the lifting height of the valve rod (9).
3. A lifting mechanism for valve testing as claimed in claim 1, wherein: the device comprises an auxiliary measuring block (4), wherein the auxiliary measuring block (4) comprises a vibration sensor (6), one end of the auxiliary measuring block (4) is connected with a flexible connecting mechanism (31), and the other end of the auxiliary measuring block is detachably connected with a valve rod (9).
4. A lifting mechanism for valve testing as claimed in claim 3, wherein: the auxiliary measuring block (4) comprises a plurality of types and is used for matching valve rods (9) with different diameters; the auxiliary measuring blocks (4) of various types are identical in overall dimension.
5. A lifting mechanism for valve testing as claimed in claim 1, wherein: the flexible connection mechanism (31) is arranged as a knuckle bearing (32).
6. A lifting mechanism for valve testing as claimed in claim 1, wherein: the support frame (2) comprises an upper support plate (21), a lower support plate (23) and a support screw (22), wherein the upper support plate (21) is detachably connected with a shell of the driving mechanism (1), the lower support plate (23) is detachably connected with a valve (8) body, and the upper support plate (21) and the lower support plate (23) are connected through the support screw (22), so that the valve rod (9) can be stably lifted when the driving mechanism (1) operates.
7. A lifting mechanism for valve testing as recited in claim 6, wherein: the supporting screw (22) is provided with a fine adjustment nut (24) for adjusting the height of the supporting frame (2).
8. A lifting mechanism for valve testing as claimed in claim 1, wherein: the driving mechanism (1) comprises a motor (11) and a connecting rod (12) driven by the motor (11), and the connecting rod (12) is connected with a tension pressure sensor (5).
9. A method for using a lifting mechanism for valve test, applied to the lifting mechanism for valve test as claimed in any one of claims 1 to 8, characterized in that: the method comprises the following steps:
s1: the support frame (2) is connected with a motor (11) shell and a valve (8) to be detected, a connecting rod (12) of the motor (11) is connected with a tension pressure sensor (5), and the tension pressure sensor (5) is connected with a knuckle bearing (32);
s2: the joint bearing (32) is connected with an auxiliary measuring block (4) matched with a valve rod (9) of a valve (8) to be detected, and a vibration sensor (6) is arranged at a certain distance from the auxiliary measuring block (4);
s3: the height of the supporting frame (2) is adjusted through a fine adjustment nut (24), and the auxiliary measuring block (4) is connected with the valve rod (9);
s4: after connection, confirming that the device axis from the motor (11) to the valve rod (9) is overlapped with the axis of the valve rod (9);
s5: under the actual use situation of the valve (8), the lifting of the valve rod (9) is regulated by the motor (11), and the lift of the valve (8) is controlled;
s6: recording the lift of a valve (8) through a displacement sensor (7), and recording data of a vibration sensor (6) and a tension pressure sensor (5) in a test;
s7: and according to the recorded data of the inlet-outlet pressure ratio, the lift, the flow, the vibration and the pulling pressure, the performance of the valve (8) design is determined through processing.
10. A method of using a lifting mechanism for valve testing as claimed in claim 9, wherein: and after the steps are finished, when the valve (8) of other types needs to be continuously measured, the support frame (2) is disassembled and is mounted on a new valve (8) to be measured, and the auxiliary measuring block (4) matched with the valve rod (9) of the new valve (8) to be measured is replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310859342.8A CN117054075A (en) | 2023-07-13 | 2023-07-13 | Lifting mechanism for valve test and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310859342.8A CN117054075A (en) | 2023-07-13 | 2023-07-13 | Lifting mechanism for valve test and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117054075A true CN117054075A (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310859342.8A Pending CN117054075A (en) | 2023-07-13 | 2023-07-13 | Lifting mechanism for valve test and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117054075A (en) |
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2023
- 2023-07-13 CN CN202310859342.8A patent/CN117054075A/en active Pending
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