CN108827564B - Valve two-way centre gripping test fixture - Google Patents
Valve two-way centre gripping test fixture Download PDFInfo
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- CN108827564B CN108827564B CN201811051115.8A CN201811051115A CN108827564B CN 108827564 B CN108827564 B CN 108827564B CN 201811051115 A CN201811051115 A CN 201811051115A CN 108827564 B CN108827564 B CN 108827564B
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 101
- 230000001105 regulatory effect Effects 0.000 claims abstract description 56
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 239000012530 fluid Substances 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 13
- 230000002457 bidirectional effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 54
- 238000009423 ventilation Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The two-way clamping test fixture for the valve is provided, and the two-way clamping test fixture for the valve is provided with a plurality of horizontal connecting rods and two steel plate brackets, wherein one steel plate bracket is provided with a manual clamping mechanism consisting of a hand wheel, a screw rod and a clamping flange II at the execution end of the screw rod; the other is provided with a pneumatic/hydraulic clamping mechanism consisting of an air cylinder/hydraulic cylinder, an air/liquid path control system and a clamping flange I; and the gas/liquid path control system comprises a fluid flow rate regulating valve; the two clamping flange bodies are respectively provided with an L-shaped fluid flow passage which is connected with the gas/liquid path control system in parallel; the two L-shaped fluid flow passages are respectively provided with a pressure regulating valve and a switching valve to realize independent air supply between the manual clamping mechanism and the pneumatic/hydraulic clamping mechanism. The pressure resistance level of the invention is adjustable; the action speed of the air/hydraulic cylinder is adjustable; the structure is simple and compact; the operation is convenient; the stroke is adjustable; the valve is suitable for free selection of a high-pressure valve or a low-pressure valve; the range is wider, and the method is economical and practical.
Description
Technical Field
The invention belongs to the technical field of valve static pressure test clamping fixing devices, and particularly relates to a valve bidirectional clamping test fixture.
Background
The equipment bearing capacity and valve leakage level test is a test item necessary for bearing equipment products, is an important index for measuring the performance of the products, and directly relates to whether the products can be safely and normally used. Many pressure-bearing devices in aviation, mining and metallurgy, building materials, petrochemical industry and water conservancy and electric departments need to be tested. To meet the static pressure test of different types of valves: under the prior art, the test fixture capable of testing the pressure bearing performance and the leakage level of the valve is a clamping structure driven by pure electric, pneumatic or hydraulic pressure or a clamping structure driven by pure manual force; the valve is according to the different model; dividing the bearing into a plurality of bearing grades; although the clamping mechanisms can meet the clamping requirements of valves with different sizes; however, a proper clamping mechanism cannot be selected to clamp the fixed valve according to the change of the pressure resistance level; for example, when the valve pressure resistance rating itself is low; if a fully automatic electric, pneumatic or hydraulic driven clamping mechanism is still used to clamp the valve; the valve itself is easily damaged mechanically, resulting in scrapping of the product; and when the pressure resistance level of the valve is higher; at this time, the manual clamping force of the clamping device is limited; but also cannot meet the clamping and sealing requirements of the high-pressure-bearing valve. Together with this; in particular, the clamping action speed of the pneumatic or electric clamping mechanism is not adjustable; the safety and stability of the clamping operation are reduced; in this regard, a manual and automatic clamping is provided which can be switched freely or simultaneously; the mechanical structure of the valve is protected from damage caused by overlarge clamping force to the greatest extent; the clamping force is not too small to meet the clamping requirement of the high-pressure valve; the clamping tool can meet the protection of valve tests with different pressure resistance grades, can be freely switched and selected and can regulate the speed; the fixture is ensured to be simple in structure; the cost is low; the operation is convenient; the stroke adjustment requirements of valves of different types can be met; the technical scheme with higher working efficiency.
Disclosure of Invention
The invention solves the technical problems that: the utility model provides a two-way centre gripping test fixture of valve solves the technical problem that involves in the background art.
The invention adopts the technical scheme that: valve two-way centre gripping test fixture has two steel sheet supports of many horizontal connecting rods and the vertical installation in many horizontal connecting rod both ends, its characterized in that: a manual clamping mechanism is vertically arranged on the steel plate support plate body; the other steel plate support plate body is vertically provided with a pneumatic/hydraulic clamping mechanism; the manual clamping mechanism consists of a hand wheel, a screw rod and a clamping flange II at the execution end of the screw rod; the pneumatic/hydraulic clamping mechanism consists of an air cylinder/hydraulic cylinder, a clamping flange I at the execution end of the air cylinder/hydraulic cylinder and an air/liquid path control system; the gas/liquid path control system comprises a fluid flow rate regulating valve for regulating the speed of the execution end action of the air cylinder/hydraulic cylinder; the clamping flange I and the clamping flange II are respectively provided with an L-shaped fluid flow passage; and two L-shaped fluid flow passages are connected in parallel to the gas/liquid path control system, and the two L-shaped fluid flow passages are respectively provided with a pressure regulating valve I and a pressure regulating valve II and a switching valve I and a switching valve II which are respectively arranged on the independent fluid pipelines so as to realize independent gas supply between the manual clamping mechanism and the pneumatic/hydraulic clamping mechanism.
It should be noted that: the pneumatic/hydraulic clamping mechanism refers to a pneumatic clamping mechanism or a hydraulic clamping mechanism; thus, when the pneumatic/hydraulic clamping mechanism refers to a pneumatic clamping mechanism; the cylinder/hydraulic cylinder corresponds to a cylinder; the gas/liquid path control system is correspondingly a gas path control system; the total gas/liquid source referred to hereinafter corresponds to a total gas source (e.g., compressed air or nitrogen). Similarly: when the pneumatic/hydraulic clamping mechanism refers to a hydraulic clamping mechanism; the air cylinder/hydraulic cylinder corresponds to a hydraulic cylinder; the gas/liquid path control system is correspondingly a liquid path control system; the total gas/liquid source referred to hereinafter corresponds to the total liquid source (e.g., high pressure water, hydraulic oil).
Further: to facilitate observation of whether leakage pressure drop occurs in the gas path: the gas/liquid path control system is provided with a pressure gauge; the pressure gauge is connected into the total gas/liquid source passage to indicate the total gas/liquid source real-time pressure.
Further: to facilitate measurement of leakage: the gas/liquid path control system is provided with a switch valve III; one end of the switch valve III is connected with a gas/liquid source; the other end is respectively connected with the air inlet/liquid end of the air cylinder/hydraulic cylinder and the switch valve IV which are connected in parallel. Further: the tail end of the gas/liquid path control system is provided with an exhaust/liquid valve; the exhaust/liquid valve is used for measuring the leakage amount of the valve to be tested in unit time so as to calculate the leakage grade.
Further: the gas/liquid path control system is provided with a switch valve III; one end of the switch valve III is connected with a gas/liquid source; the other end is respectively connected with the air inlet/liquid ends of the air cylinder/hydraulic cylinder and the switch valve IV which are connected in parallel; the air outlet/liquid end of the switch valve IV is connected with a pressure regulating valve I and a pressure regulating valve II which are connected in parallel; wherein the pressure regulating valve I is connected with the switching valve I and the L-shaped fluid flow passage of the clamping flange I in series; the pressure regulating valve II is connected with the switching valve I and the L-shaped fluid flow passage of the clamping flange II in series. Manual or automatic clamping mechanisms are used independently for convenience; meets the test requirements of valves with different high pressure or low pressure and different grades
Further: for the convenience dismantle change clamping flange according to different model valves: the clamping flange I and the clamping flange II are fixedly connected with respective executing mechanisms through T-shaped step blocks respectively; the horizontal part of the T-shaped step block adopts three-point positioning to respectively and firmly connect the disc bodies of the clamping flange I or the clamping flange II; the vertical part of the T-shaped step block 18 is tightly connected with external threads formed at the execution end of the execution mechanism through internal threads and a locking nut.
Preferably: in order to realize the disassembly and replacement of the two clamping flanges through a simple structure; to accommodate valve test installations of different sizes: the L-shaped fluid flow passage is formed by communicating a vertical hole and a horizontal hole.
Further: the reversing displacement switching control of the air cylinder/hydraulic cylinder is realized through a simple structure: the gas/liquid path control system is provided with a gas/liquid path switching valve; the inlet end of the gas/liquid path switching valve is connected with a gas/liquid source; and the outlet end of the gas/liquid path switching valve is connected with the two ends of the air cylinder/hydraulic cylinder in parallel. The gas/liquid inlet and outlet at the two ends of the air cylinder/hydraulic cylinder are respectively realized through the action of the gas/liquid path switching valve; to control the direction of cylinder/hydraulic cylinder movement.
Further: in order to realize the adjustment of the speed of two movement directions of the air cylinder: the fluid flow rate regulating valve has two; and are respectively arranged at two ends of the air cylinder/the hydraulic cylinder.
Preferably: the device is compact in structure: the steel plate bracket is fixedly arranged near the cylinder/hydraulic cylinder; the L-shaped steel plate support supports installation of components of the gas/liquid path control system.
Compared with the prior art, the invention has the advantages that:
1. according to the scheme, the clamping test tool for the two-way regulating valve is provided; not only the clamping stroke is adjustable; one end of the device is provided with a hand wheel type manual clamping mechanism; the other end is provided with a pneumatic or hydraulic power clamping mechanism; when the high pressure-resistant valve is measured; the clamping and fixing are completed by using a cylinder/hydraulic cylinder 4; measuring the low pressure valve; the hand wheel and the screw rod are used for clamping and fixing; the pressure regulating valve I and the pressure regulating valve II which are cooperatively connected in parallel act together; the protective clamping requirements of valves with different pressure resistance grades can be met; the occurrence probability of mechanical damage of the valve test is reduced;
2. the left clamping flange I and the right clamping flange II of the scheme respectively clamp the left end and the right end of the straight-through valve; the two clamping flanges (I, II) are respectively detachable and replaceable; the pressure regulating valves (I, II) which are connected in parallel cooperatively act together; the pressure-resistant test adjustment requirements of different types of valves and different grades can be met;
3. the clamping flange adopts L-shaped fluid flow channel ventilation/liquid flow; the device has compact structure;
4. according to the scheme, the fluid flow speed regulating valve can realize the speed regulation of the movement of the air cylinder/hydraulic cylinder 4; the safety is improved; the operation is more reliable; the safety is improved;
5. the scheme is to keep pressure by closing the exhaust/liquid valve 84; and observing the pressure gauge 2; when the pressure gauge 2 has no pressure drop; indicating that the valve is leak-free; the micro flow meter is connected after the exhaust/liquid valve 84 is opened; the leakage level of the valve can be calculated by measuring the leakage amount of the fluid in unit time; the operation is simple and convenient;
6. the scheme has simple and compact structure; the operation is convenient; the stroke is adjustable; the pressure resistance level is adjustable; the action speed of the air/hydraulic cylinder is adjustable; the application range is wider, and the method is economical and practical.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
fig. 2 is a schematic diagram of a back connection structure of the air/liquid path control system of the embodiment of fig. 1.
Detailed Description
Specific embodiments of the present invention are described below with reference to fig. 1-2.
The following examples facilitate a better understanding of the present invention, but are not intended to limit the same. The implementation of the control circuit in the following embodiments is a conventional control manner unless otherwise specified. The components used in the examples described below are commercially available unless otherwise specified.
In the present invention, unless otherwise indicated, terms such as "upper, lower, left, right, inner, outer" and the like are used merely to denote orientations of the term in a normal use state or are commonly understood by those skilled in the art, and should not be construed as limitations of the term.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The valve bidirectional clamping test fixture is provided with a plurality of horizontal connecting rods 13 and two steel plate brackets 14 (see figure 1) vertically arranged at two ends of the plurality of horizontal connecting rods 13; a manual clamping mechanism is vertically arranged on the plate body of the steel plate bracket 14; the other steel plate bracket 14 is vertically provided with a pneumatic/hydraulic clamping mechanism; it should be noted that; the linear displacement executing end of the manual clamping mechanism and the linear displacement executing end of the pneumatic/hydraulic clamping mechanism are coaxially and collinearly arranged. Furthermore, four holes are drilled at four corner positions of the steel plate brackets 14, external threads are formed at the end parts of the four horizontal connecting rods 13, steps are formed at the joints of the external threads, and the four horizontal connecting rods 13 are horizontally installed through 8 internally threaded holes of the two steel plate brackets 14. The manual clamping mechanism consists of a hand wheel 16, a screw rod 15 and a screw rod execution end clamping flange II 12; the pneumatic/hydraulic clamping mechanism consists of an air cylinder/hydraulic cylinder 4, a clamping flange I11 at the execution end of the air cylinder/hydraulic cylinder 4 and an air/liquid path control system; the cylinder/hydraulic cylinder 4 is used for pushing the clamping flange I11 to horizontally linearly displace, and the hand wheel 16 is rotated to control the clamping flange II 12 to horizontally linearly displace by the transmission of the screw rod 15. Specifically, the hand wheel 16 and the screw rod 15 are connected by adopting a rising stem gate valve type, namely, the hand wheel 16 rotates the screw rod 15 but can move forwards and backwards without rotating. The gas/liquid path control system comprises a fluid flow rate regulating valve 5 for regulating the speed of the execution end action of the cylinder/hydraulic cylinder 4; further: in order to realize the adjustment of the speed of two movement directions of the air cylinder: the fluid flow rate regulating valve 5 has two; and are respectively installed at both ends of the cylinder/hydraulic cylinder 4. The cylinder/hydraulic cylinder 4 can be prevented from acting too fast by the fluid flow rate regulating valves 5 at the two ends of the cylinder/hydraulic cylinder 4; to facilitate safe operation. The structure is compact: the clamping flange I11 and the clamping flange II 12 are respectively provided with an L-shaped fluid flow passage; the test is selected for meeting the free switching of valves with different pressure resistance grades: the two L-shaped fluid flow passages are connected in parallel to the gas/liquid path control system, and the two L-shaped fluid flow passages are respectively provided with a pressure regulating valve I3 and a pressure regulating valve II 8 and a switching valve I9 and a switching valve II 10 which are respectively arranged on the fluid pipelines which are respectively independent, so that independent gas supply between the manual clamping mechanism and the pneumatic/hydraulic clamping mechanism is realized.
To facilitate observation of whether leakage pressure drop occurs in the gas path: the gas/liquid path control system is provided with a pressure gauge 2; the pressure gauge 2 is connected into the total gas/liquid source passage to indicate the total gas/liquid source real-time pressure. The gas/liquid path control system is provided with a switch valve III 7; one end of the switch valve III 7 is connected with a gas/liquid source; the other end is respectively connected with the air inlet/liquid ends of the air cylinder/hydraulic cylinder 4 and the switch valve IV 6 which are connected in parallel; the air outlet/liquid end of the switch valve IV 6 is connected with a pressure regulating valve I3 and a pressure regulating valve II 8 which are connected in parallel; wherein the pressure regulating valve I3 is connected with an L-shaped fluid flow passage of the switching valve I9 and the clamping flange I11 in series; the pressure regulating valve II 8 is connected with an L-shaped fluid flow passage of the switching valve II 10 and the clamping flange II 12 in series. Further: to realize the reversing displacement switching control of the cylinder/hydraulic cylinder 4 by a simple structure: the gas/liquid path control system is provided with a gas/liquid path switching valve 1; the inlet end of the gas/liquid path switching valve 1 is connected with a gas/liquid source; and the gas/liquid is respectively fed into the two ends of the cylinder/hydraulic cylinder 4 through the action gas/liquid path switching valve 1; to control the direction of movement of the cylinder/hydraulic cylinder 4.
It should be noted that: the gas/liquid path control system comprises a total gas source switching valve (namely a switching valve III 7), a pressurizing gas inlet valve (namely a switching valve I9 and a switching valve II 10), a pressure gauge 2, a gas/liquid path switching valve 1, a pressure regulating valve I3, a pressure regulating valve II 8 and a pipeline accessory which are connected in parallel, wherein the total gas source switching valve (namely the switching valve III 7) is distributed on an L-shaped steel plate bracket 17. The device is compact in structure: the steel plate bracket 14 is fixedly provided with an L-shaped steel plate bracket 17 close to the air cylinder/hydraulic cylinder 4; the L-shaped steel plate bracket 17 supports the installation of components of the gas/liquid path control system. Such as: the L-shaped steel plate bracket 17 is fixed on the steel plate bracket 14 by spot welding. Wherein, the inlet end of the gas/liquid path switching valve 1 is connected with a gas/liquid source; it should be noted that; the gas/liquid source comprises high pressure compressed air, such as nitrogen; or high-pressure water, hydraulic oil, etc. Compressed air/hydraulic oil is respectively fed into and discharged from two ends of the air cylinder/hydraulic cylinder 4 through the action air/liquid path switching valve 1; the pressure gauge 2 is used for indicating the air source pressure; the inlet end of the main air source switching valve (namely a switching valve III 7) is connected with a compressed air source or a hydraulic oil source; the outlet end of the main air source switching valve (namely a switching valve III 7) is divided into three paths through two tee joints (a main air inlet tee joint 23 and a pressure gauge tee joint 21), and one path is connected into the inlet end of the air/liquid path switching valve 1 after passing through the pressure gauge 2 so as to supply air or liquid fluid for the air cylinder/hydraulic cylinder 4; the other two paths are connected with a pressure regulating valve I3 and a switching valve I9; the other path is connected with a pressure regulating valve II 8 and a switching valve II 10.
Further: to facilitate measurement of leakage: the gas/liquid path control system is provided with a switch valve III 7; one end of the switch valve III 7 is connected with a gas/liquid source; the other end is respectively connected with the air inlet/liquid ends of the air cylinder/hydraulic cylinder 4 and the switch valve IV 6 which are connected in parallel. Further: the end of the gas/liquid path control system is provided with an exhaust/liquid valve 84; the exhaust/liquid valve 84 is used to measure the amount of leakage per unit time of the valve under test to calculate the leakage rating.
Further: for the convenience of disassembling and replacing the clamping flanges (I, II) according to different types of valves: the clamping flange I11 and the clamping flange II 12 are fixedly connected with respective actuating mechanisms through T-shaped step blocks 18 respectively; the horizontal part of the T-shaped step block 18 adopts three-point positioning to respectively fasten and connect the disc bodies of the clamping flanges I11 and II 12; the vertical part of the T-shaped step block 18 is tightly connected with external threads formed at the execution end of the execution mechanism through internal threads and a locking nut. Specifically, the front end of the screw rod is provided with a small section of external fine thread, the vertical part of the middle part of the processed T-shaped step block 18 is provided with an internal thread matched with the external fine thread of the screw rod, so that the T-shaped step block 18 is locked by using a nut after being mounted on the end part of the screw rod 15. The horizontal part disc body of the T-shaped step block 18 is provided with three internal threaded holes, the disc body of the clamping flange I11 or the clamping flange II 12 is reserved with the same three internal threaded holes matched and corresponding to the three internal threaded holes, and the clamping flange I11 or the clamping flange II 12 can be fixedly connected with the T-shaped step block 18 by using three single-head bolts and nuts. The two clamping flanges (I, II) are provided with L-shaped runner holes, and when the tested pressure-bearing element or valve is clamped between the two clamping flanges (I, II).
Preferably: in order to realize the disassembly and replacement of the two clamping flanges I through a simple structure; to accommodate valve test installations of different sizes: the L-shaped fluid flow passage is formed by communicating a vertical hole and a horizontal hole.
(see the embodiment of fig. 2) it should be noted that: wherein the air source is connected with the main air inlet tee 23 through a switch valve interface I71; an outlet port of the total inlet tee 23 is connected with a switch valve port II 61; the other air outlet interface is provided with a pressure gauge 2 and an air inlet 81 through a right-angle joint 22 and a pressure gauge tee joint 21 so as to test the real-time air pressure of an air source; the air inlet 81 is communicated with an air outlet I82, an air outlet II 83 and an exhaust/liquid valve 84; and the air source is connected in parallel among the air outlet I82, the air outlet II 83 and the exhaust/liquid valve 84; wherein the air outlet I82 is connected with a pressure regulating valve I3 in series; the air outlet II 83 is connected in series with a pressure regulating valve II 8; the vent/liquid valve 84 is used to test the valve leakage to be tested for open use. See fig. 2: the pressure regulating valve I3 can be connected with a branch of the air source, which is separated by a tee joint, through a right-angle joint 62; the pressure regulating valve II 8 is connected with the other branch of the air source through a tee joint.
Working principle: taking the cylinder/hydraulic cylinder 4 as an example of a cylinder embodiment: before testing, keeping other valves closed; only opening a switching valve III 7 to enable the system to be connected with a compressed air source; and the air passage switching valve is operated to enable the air cylinder to be in a contracted state. Firstly, replacing a clamping flange I11 and a clamping flange II 12 with proper model sizes according to the model of the valve; so as to be well connected with the valve to be tested; an adjusting hand wheel 16; the valve to be tested can be just placed between the clamping flanges I11 and II 12; the gas path switching valve is actuated again: extending the cylinder; the tested valve is firmly clamped on the test tool; after the concentric and coaxial non-eccentric structure among the clamping flange I11, the clamping flange II 12 and the valve to be tested is confirmed, the testing work can be started: on the premise of keeping the switch valve III 7 open, firstly, opening the switch valve IV 6; according to the pressure resistance level of the valve; regulating the pressure regulating valve I3 to a proper ventilation pressure; then opening the switch valve I9, ventilating the L-shaped fluid flow passage of the clamping flange I11, and closing the switch valve II 10; the pressure of the valve to be tested continuously rises; until the pressure expression reaches a limit set pressure value; then, the switch valve I9 and the switch valve IV 6 are closed, so that the pressure of the valve to be tested is maintained; observing a pressure gauge; if there is no pressure drop for a specified period of time; the normal compound requirement of the bearing of the valve to be tested is indicated; and the withstand voltage test is qualified.
And the same thing; when a valve with smaller pressure resistance is clamped by using manual operation; before testing, keeping other valves closed; only opening a switching valve III 7 to enable the system to be connected with a compressed air source; and rotating the hand wheel to enable the screw rod to move backwards. Firstly, replacing a proper clamping flange I11 and a proper clamping flange II 12 according to the size and the model of the valve; so as to be well connected with the valve to be tested; an adjusting hand wheel 16; the valve to be tested can be just placed between the clamping flanges I11 and II 12; rotating the hand wheel 16 again to enable the screw rod to move forwards; the tested valve is firmly clamped on the test tool; after the concentric and coaxial non-eccentric structure among the clamping flange I11, the clamping flange II 12 and the valve to be tested is confirmed, the testing work can be started: on the premise of keeping the switch valve III 7 open, firstly, opening the switch valve IV 6; according to the pressure resistance level of the valve; regulating the pressure regulating valve II 8 to a proper ventilation pressure; then opening the switch valve II 10, and ventilating the L-shaped fluid flow passage of the clamping flange II 12 under the condition that the switch valve I9 is closed; the pressure of the valve to be tested continuously rises; until the pressure expression reaches a limit set pressure value; then closing a switch valve II 10 and a switch valve IV 6 to keep the pressure of the valve to be tested; observing the pressure gauge 2; if there is no pressure drop for a specified period of time; the normal compound requirement of the bearing of the valve to be tested is indicated; and the withstand voltage test is qualified.
When the leakage amount of the valve to be tested needs to be tested: closing other valves; only the vent/liquid valve 84 is opened, connecting the flow meter; testing the leakage amount per unit time; and calculating the leakage grade of the valve.
It should be noted that, the working principle of the foregoing embodiment is only the working principle of the cylinder embodiment; the working principle is the same as that of the hydraulic cylinder, and when the high-pressure liquid test is needed, the cylinder is only needed to be replaced by the oil cylinder; the valve leakage level and pressure resistance test to be tested can be completed according to the steps by replacing the switching valves (I, II, III, IV), the pressure gauge, the pressure regulating valve (III) and the fluid flow speed regulating valve 5 related to other liquid path control systems with corresponding liquid elements capable of resisting high pressure.
Therefore, the bidirectional regulating valve clamping test tool disclosed by the invention is provided with a clamping tool; not only the clamping stroke is adjustable; one end of the device is provided with a hand wheel type manual clamping mechanism; the other end is provided with a pneumatic or hydraulic power clamping mechanism; when the high pressure-resistant valve is measured; the clamping and fixing are completed by using a cylinder/hydraulic cylinder 4; measuring the low pressure valve; the hand wheel and the screw rod are used for clamping and fixing; the pressure regulating valves II in cooperative parallel act together; the protective clamping requirements of valves with different pressure resistance grades can be met; the occurrence probability of mechanical damage of the valve test is reduced. Furthermore, the left clamping flange I11 and the right clamping flange II 12 respectively clamp the left end and the right end of the through valve; the two clamping flanges (I11, II 12) are detachable and replaceable; the pressure regulating valves (I3, II 8) which are connected in parallel cooperatively act together; the pressure-resistant test adjusting requirements of different types of valves and different grades can be met. Additionally, the clamping flanges (I11, II 12) respectively adopt L-shaped fluid flow channels for ventilation or liquid ventilation; the device has compact structure. The speed of the fluid flow rate in and out of the air cylinder or the hydraulic cylinder can be regulated under the combined action of the fluid flow rate regulating valve arranged on the air cylinder or the hydraulic cylinder; thereby realizing the adjustment of the action speed of the air cylinder or the hydraulic cylinder; the cylinder or the hydraulic cylinder is safer when clamping the valve to be tested; more reliable; preventing mechanical damage to the valve to be tested. Again: after the valve to be tested is installed and ventilated; the corresponding switch valve 3 or switch valve 8 is closed, and the air/liquid exhausting valve 84 is used for maintaining the pressure of the valve to be tested after ventilation; observing the pressure gauge 2 in real time; when the pressure gauge 2 has no pressure drop; indicating that the valve to be tested has no leakage; if leakage occurs; when the leakage level of the valve to be measured is to be measured: only the exhaust/liquid valve 84 is opened and then the micro-flowmeter is connected; the leakage level of the valve can be calculated by measuring the leakage amount of the fluid in unit time; the operation is simple and convenient. The hand wheel rotates, so that the clamping stroke can be conveniently and quickly adjusted; valves with different sizes can be clamped on the test tool conveniently.
In summary, the cylinder clamping mechanism is used for acting when the high pressure valve is tested; when testing the low pressure valve; the clamping action of the hand wheel screw rod is completed; the clamping mode of the stroke adjusting mechanism can be freely selected according to the pressure resistance of the valve; additionally, the action speed of the air/hydraulic cylinder is adjustable; the structure is simple and compact; the operation is convenient; the stroke is adjustable; the pressure resistance level is adjustable; the application range is wider, and the method is economical and practical.
The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent modifications made by the appended claims shall be included in the scope of the present invention.
Claims (6)
1. Valve two-way centre gripping test fixture has two steel sheet supports (14) of many horizontal connecting rods (13) and the vertical installation in many horizontal connecting rod (13) both ends, its characterized in that: a manual clamping mechanism is vertically arranged on the plate body of the steel plate bracket (14); the other steel plate bracket (14) is provided with a pneumatic/hydraulic clamping mechanism vertically; the manual clamping mechanism consists of a hand wheel (16), a screw rod (15) and a screw rod execution end clamping flange II (12); the pneumatic/hydraulic clamping mechanism consists of an air cylinder/hydraulic cylinder (4), a clamping flange I (11) at the execution end of the air cylinder/hydraulic cylinder and an air/liquid path control system; the gas/liquid path control system comprises a fluid flow rate regulating valve (5) for regulating the speed of the execution end action of the air cylinder/hydraulic cylinder (4); the disc bodies of the clamping flange I (11) and the clamping flange II (12) are respectively provided with an L-shaped fluid flow passage; the two L-shaped fluid flow channels are connected in parallel to the gas/liquid path control system, and the two L-shaped fluid flow channels are respectively provided with a pressure regulating valve I and a pressure regulating valve II (3 and 8) and a switching valve I and a switching valve II (9 and 10) on fluid pipelines which are respectively independent to each other so as to realize independent gas supply between the manual clamping mechanism and the pneumatic/hydraulic clamping mechanism;
the gas/liquid path control system is provided with a pressure gauge (2); the pressure gauge (2) is connected into the total gas/liquid source passage to indicate the total gas/liquid source real-time pressure;
the gas/liquid path control system is provided with a switch valve III (7); one end of the switch valve III (7) is connected with a gas/liquid source; the other end is respectively connected with the air inlet/liquid ends of the air cylinder/hydraulic cylinder (4) and the switch valve IV (6) which are connected in parallel; an exhaust/liquid valve (84) is arranged at the tail end of the gas/liquid path control system; the exhaust/liquid valve (84) is used for measuring the leakage amount of the valve to be measured in unit time so as to calculate the leakage level;
the air outlet/liquid end of the switch valve IV (6) is connected with a pressure regulating valve I (3) and a pressure regulating valve II (8) which are connected in parallel;
wherein the pressure regulating valve I (3) is connected with the L-shaped fluid flow passage of the switching valve I (9) and the clamping flange I (11) in series; the pressure regulating valve II (8) is connected with an L-shaped fluid flow passage of the switching valve II (10) and the clamping flange II (12) in series;
the gas/liquid path control system is provided with a gas/liquid path switching valve (1); the inlet end of the gas/liquid path switching valve (1) is connected with a gas/liquid source; the outlet end of the gas/liquid path switching valve (1) is connected with two ends of the air cylinder/hydraulic cylinder (4) in parallel;
an inlet end of the switch valve III (7) is connected with a compressed air source or a hydraulic oil source; the outlet end of the switch valve III (7) is divided into three paths through two three paths, and one path is connected to the inlet end of the gas/liquid path switching valve 1 after passing through the pressure gauge 2; the other two paths are connected with a pressure regulating valve I3 and a switching valve I9; the other path is connected with a pressure regulating valve II 8 and a switching valve II 10.
2. The valve bidirectional clamping test fixture of claim 1, wherein: the gas/liquid path control system is provided with a switch valve III (7); one end of the switch valve III (7) is connected with a gas/liquid source; the other end is respectively connected with the air inlet/liquid end of the air cylinder/hydraulic cylinder (4) and the switch valve IV (6) which are connected in parallel.
3. The valve bidirectional clamping test fixture of claim 1, wherein: the clamping flange I (11) and the clamping flange II (12) are fixedly connected with respective actuating mechanisms through T-shaped step blocks (18) respectively; the horizontal part of the T-shaped step block (18) adopts three-point positioning to respectively fasten and connect the disc body of the clamping flange I (11) or the clamping flange II (12); the vertical part of the T-shaped step block (18) is tightly connected with an external thread at the execution tail end of the execution mechanism through a manufactured internal thread and a locking nut.
4. The valve bidirectional clamping test fixture of claim 1, wherein: the L-shaped fluid flow passage is formed by communicating a vertical hole and a horizontal hole.
5. The valve bidirectional clamping test fixture of claim 1, wherein: the fluid flow rate regulating valve (5) has two; and are respectively arranged at two ends of the air cylinder/hydraulic cylinder (4).
6. The valve bidirectional clamping test fixture of claim 1, wherein: the steel plate bracket (14) is fixedly provided with an L-shaped steel plate bracket (17) close to the air cylinder/hydraulic cylinder (4); the L-shaped steel plate support (17) supports installation of components of the gas/liquid path control system.
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| CN201811051115.8A CN108827564B (en) | 2018-09-10 | 2018-09-10 | Valve two-way centre gripping test fixture |
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| CN201811051115.8A CN108827564B (en) | 2018-09-10 | 2018-09-10 | Valve two-way centre gripping test fixture |
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| CN108827564B true CN108827564B (en) | 2024-02-09 |
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| CN109855813B (en) * | 2019-01-10 | 2024-04-19 | 上海盛韬半导体科技有限公司 | Simple detection device integrating pressure maintaining and helium leakage detection and operation method thereof |
| CN111366311B (en) * | 2020-03-23 | 2021-08-31 | 常熟理工学院 | Air pressure detection device of recovery pressure reducing valve |
| CN111721524A (en) * | 2020-06-04 | 2020-09-29 | 肯卓自控工程(江苏)有限公司 | Execution driving type valve pressure test table |
| CN112378590A (en) * | 2020-07-16 | 2021-02-19 | 南京禹智智能科技有限公司 | Check valve machining detection table and detection method |
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