CN109141867B - Valve pressure test device capable of being clamped and loosened rapidly - Google Patents
Valve pressure test device capable of being clamped and loosened rapidly Download PDFInfo
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- CN109141867B CN109141867B CN201811294484.XA CN201811294484A CN109141867B CN 109141867 B CN109141867 B CN 109141867B CN 201811294484 A CN201811294484 A CN 201811294484A CN 109141867 B CN109141867 B CN 109141867B
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- connecting rod
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- bending arm
- hinged
- elastic
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000005452 bending Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract 2
- 238000003825 pressing Methods 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Safety Valves (AREA)
Abstract
A valve pressure test device capable of being clamped and loosened rapidly. The method is characterized in that: the lower connecting rod is in sliding fit with the upper connecting rod and is connected with the upper connecting rod through an elastic piece, the lower end of the lower connecting rod is hinged to the frame, the lower end of the lower connecting rod is hinged to the end part of the piston rod, the upper connecting rod is hinged to the upper end of the middle connecting rod, the lower end of the middle connecting rod is hinged to the middle part of a bending arm, one end of the bending arm is hinged to the frame, and a jacking component is arranged below the other end of the bending arm; the jacking component acts along with the bending arm and is provided with a first position for compacting the valve and a second position separated from the valve; when the jacking component is located at the first position, the elastic telescopic connecting piece swings through the dead point position. The valve clamping device has the advantages that the valve clamping device can clamp and loosen the valve quickly through the transmission mode of the four connecting rods, when the valve clamping device clamps the valve, the elastic telescopic connecting piece can overcome the condition that the elastic force of the elastic piece swings to pass through the dead point position, the elastic force of the elastic piece is transmitted to the bending arm, the bending arm is tightly propped against the valve through the propping assembly, the compression effect is ensured, and the reliability of the pressure test is ensured.
Description
Technical Field
The invention relates to the field of valve pressure tests, in particular to a valve pressure test device capable of rapidly clamping and loosening.
Background
According to regulations, the valve needs to be subjected to performance tests before delivery, and the performance tests of the valve mainly comprise a strength test, a pressure test and an action test, wherein the pressure test is a key performance of internal leakage of the valve and is a test item which needs to be carried out before delivery.
The traditional pressure test method is to connect a flange blind plate with a valve, then fill test medium into the cavity, and keep the pressure for 5 minutes under the pressure 1.1 times of the nominal pressure, so that the leakage rate meets the related requirements.
However, in the valve pressure test, because the blind plate needs to be tightened and loosened when being replaced, the operation is very troublesome, time and labor are consumed, the working efficiency of the valve pressure test procedure is low, and how to improve the working efficiency of the valve pressure test is a problem which needs to be solved by the person skilled in the art.
Disclosure of Invention
In order to overcome the defects of the background technology, the invention provides a valve pressure test device capable of rapidly clamping and loosening, and solves the problem of low working efficiency of the existing valve pressure test.
The invention adopts the technical scheme that: a rapid clamping and loosening valve pressure test device comprises a frame, a pressing blind plate arranged on the frame and used for being matched with a valve to carry out a pressure test, and a pressing mechanism for pressing and sealing the valve and the pressing blind plate; the pressing blind plate is horizontally arranged on the frame, and the valve to be tested is arranged on the pressing blind plate; the compressing mechanism comprises a power source, an elastic telescopic connecting piece, a middle connecting rod, a bending arm and a jacking component; the power source adopts a hydraulic cylinder or an air cylinder, and comprises a cylinder body and a piston rod, wherein the cylinder body is hinged on the frame; the elastic telescopic connecting piece comprises a lower connecting rod, an upper connecting rod and an elastic piece, wherein the lower connecting rod is in sliding fit with the upper connecting rod and is connected through the elastic piece, the lower connecting rod is hinged on the frame, the lower end of the lower connecting rod is hinged with the end part of the piston rod, the upper connecting rod is hinged with the upper end of the middle connecting rod, the lower end of the middle connecting rod is hinged with the middle part of a bending arm, one end of the bending arm is hinged on the frame, and a jacking component is arranged below the other end of the bending arm; the jacking component moves along with the bending arm and is provided with a first position for compacting the valve and a second position separated from the valve; when the jacking component is located at the first position, the elastic telescopic connecting piece swings through the dead point position.
The frame comprises two side plates which are arranged in parallel, and the two side plates are connected through plate ribs; the power source and the elastic telescopic connecting piece are arranged between the two side plates; the middle connecting rod and the bending arm are respectively provided with two groups and are symmetrically arranged on the two side plates.
A disc spring cylinder is fixed at the upper end of the lower connecting rod, and a guide sleeve is fixedly arranged at the upper end of the disc spring cylinder; the upper connecting rod passes through the guide sleeve and is in sliding fit with the guide sleeve, and a limit boss is formed at the lower end of the upper connecting rod; the elastic piece is a disc spring, the disc spring is arranged in the disc spring cylinder and sleeved on the upper connecting rod, and the upper end and the lower end of the disc spring are respectively propped against the lower end face of the guide sleeve and the limiting boss.
The upper end of the upper connecting rod is also provided with a movable block, a positioning sleeve and an operating hand wheel, wherein the movable block is sleeved on the upper connecting rod and is hinged with the two groups of middle connecting rods; the locating sleeve and the operating hand wheel are in threaded fit with the upper connecting rod, and the movable block is clamped between the locating sleeve and the operating hand wheel and is in axial limit fit with the locating sleeve and the operating hand wheel.
The jacking component comprises a connecting plate and an adjusting block ejector rod; the connecting plate is fixedly arranged on the bending arm, a long mounting groove is formed in the connecting plate, the adjusting block is arranged in the mounting groove, and the ejector rod is arranged on the adjusting block.
The top of the ejector rod is connected with the adjusting block through threads.
When the jacking assembly is located at the first position, the piston rods are all retracted into the cylinder body, and the stroke is 0.
The beneficial effects of the invention are as follows: by adopting the scheme, through the transmission mode of four connecting rods, can realize pressing from both sides tightly fast and loosen the valve, when pressing from both sides tightly, the elastic force pendulum dead point position of elastic component can be overcome to the elastic expansion joint spare for the elastic force of elastic component transmits for the bending arm, and bending arm rethread roof pressure subassembly is tight with the valve top, thereby has ensured to compress tightly the effect, guarantees airtight pressure test's reliability.
Drawings
FIG. 1 is a schematic diagram of a valve pressure test apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a valve pressure test apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a valve pressure test device according to an embodiment of the invention.
Fig. 4 is a schematic structural view of an elastic telescopic connector according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a pressing assembly according to an embodiment of the invention.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings: as shown in the figure, the valve pressure test device capable of rapidly clamping and loosening comprises a frame 1, a pressing blind plate 2 and a pressing mechanism.
The pressing blind plate 2 is horizontally arranged on the frame 1, the valve 9 to be tested can be directly arranged on the pressing blind plate 2 during pressure test, then the pressing blind plate 2 is tightly pressed and sealed from top to bottom through the pressing mechanism, a passing test pipeline is arranged in the center of the pressing blind plate 2, and after the valve 9 is tightly pressed and sealed, compressed air can enter the valve through the test pipeline, so that the pressure sealing test is realized. The specific structure of the pressing blind plate 2 is an existing design, and therefore, details are not described here.
As shown in the figure, the compressing mechanism comprises a power source 4, an elastic telescopic connecting piece 5, an intermediate connecting rod 6, a bending arm 7 and a jacking component 8.
The power source 4 adopts a hydraulic cylinder and comprises a cylinder body 41 and a piston rod 42, wherein the cylinder body 41 is hinged on the frame 1, and the piston rod 42 is driven by the hydraulic pressure to reciprocate along the cylinder body 41 so as to provide driving force for compaction and release. Of course, the power source can also adopt an air cylinder, and the hydraulic cylinder is preferably selected as the power source because the hydraulic cylinder is small in size and strong in driving force.
The elastic telescopic connecting piece 5 comprises a lower connecting rod 51, an upper connecting rod 52 and an elastic piece, wherein a disc spring cylinder 511 is fixed at the upper end of the lower connecting rod 51, and a guide sleeve 512 is fixedly arranged at the upper end of the disc spring cylinder 511; the upper connecting rod 52 passes through the guide sleeve 512 and is in sliding fit with the guide sleeve 512, and a limit boss 521 is formed at the lower end of the upper connecting rod 52; the elastic piece is a disc spring 53, the disc spring 53 is arranged in the disc spring cylinder 511 and sleeved on the upper connecting rod 52, the upper end and the lower end of the disc spring 53 respectively abut against the lower end face of the guide sleeve 512 and the limiting boss 521, and the disc spring 53 drives the lower connecting rod 51 and the upper connecting rod 52 to bear force in opposite directions.
The lower connecting rod 51 is hinged to the frame 1, the lower end of the lower connecting rod is hinged to the end portion of the piston rod 42, the upper connecting rod 52 is hinged to the upper end of the middle connecting rod 6, the lower end of the middle connecting rod 6 is hinged to the middle of the bending arm 7, one end of the bending arm 7 is hinged to the frame 1, the jacking component 8 is installed below the other end of the bending arm, the jacking component 8 acts along with the bending arm 7 and has a first position for compressing the valve 9 and a second position separated from the valve 9, rapid clamping and loosening of the valve can be achieved through a four-connecting rod transmission mode, and meanwhile when the jacking component 8 is located at the first position, the elastic telescopic connecting piece 5 swings through a dead center for a certain angle.
In the action of pressing the valve, the piston rod 42 acts and drives the elastic telescopic connecting piece 5 to swing, at this time, the disc spring 53 is compressed, and meanwhile, the elastic telescopic connecting piece 5 can drive the bending arm 7 to swing through the middle connecting rod 6, and the bending arm 7 can drive the jacking component 8 to synchronously act.
Before the dead point position, the elastic force generated by the compression of the disc spring 53 drives the bending arm 7 to reset upwards through the upper connecting rod 52 and the middle connecting rod 6, and once the dead point position is passed, the stress direction can be changed, and the elastic force generated by the compression of the disc spring 53 drives the bending arm 7 to be downwards through the upper connecting rod 52 and the middle connecting rod 6, so when the jacking component 8 is positioned at the first position, the elastic force generated by the compression of the disc spring 53 is transmitted to the bending arm 7, and the jacking component 8 is driven to firmly compress the valve 9, so that the compression effect is ensured, and the reliability of an airtight pressure test is ensured.
When the hinge point P1 of the lower connecting rod 51 and the frame 1, the hinge point P2 of the middle connecting rod 6 and the bending arm 7, and the hinge point P3 of the upper connecting rod 52 and the middle connecting rod 6 are on the same straight line, the dead point is the dead point position.
In the valve loosening action, the piston rod 42 is reset, the piston rod 42 drives the elastic telescopic connecting piece 5 to swing, and after the dead point position is passed, the elastic force generated by compression of the disc spring 53 is released, and the rapid loosening is realized by matching with the piston rod 42.
As shown in the figure, the frame 1 comprises two side plates 11 which are arranged in parallel, the two side plates 11 are connected through a plate rib 12, and the frame is simple and stable in structure and convenient to produce and manufacture. Meanwhile, the power source 4 and the elastic telescopic connecting piece 5 are arranged between the two side plates 11; the middle connecting rod 6 and the bending arm 7 are respectively provided with two groups, and are symmetrically arranged on the two side plates 11, so that the layout is reasonable, the stress is balanced and stable, and the reliability of the test is ensured.
As shown in the figure, the upper end of the upper connecting rod 52 is further provided with a movable block 522, a positioning sleeve 523 and an operation hand wheel 524, wherein the movable block 522 is sleeved on the upper connecting rod 52 and is hinged with the two groups of middle connecting rods 6; the locating sleeve 523 and the operating hand wheel 524 are in threaded fit with the upper connecting rod 52, and the movable block 522 is clamped between the locating sleeve 523 and the operating hand wheel 524 and is in axial limit fit with the locating sleeve 523 and the operating hand wheel 524.
Through the adjustment to locating sleeve 523 and operation hand wheel 524, can realize movable block 522 along the axial position adjustment of upper connecting rod 52 to realize the elasticity to disc spring 53 and adjust, can finely tune according to the specific test requirement, further enlarge its application scope.
As shown in the figure, the jacking component 8 comprises a connecting plate 81, an adjusting block 82 and a push rod 83; the connecting plate 81 is fixedly installed on the bending arm 7, a long installation groove 811 is formed in the connecting plate 81, the adjusting block 82 is installed in the installation groove 811, and the ejector rod 83 is installed on the adjusting block 82.
The adjusting block 82 can be matched with the mounting groove 811 through bolts, the horizontal position can be adjusted through the mounting groove 811, the top of the ejector rod 83 is connected with the adjusting block 82 through threads, replacement of the ejector rod 83 or adjustment of the height position of the ejector rod 83 can be achieved, and therefore the pressing assembly 8 can find a proper pressing point according to different specifications of the valve.
Wherein, every group roof pressure subassembly 8 sets up two regulating blocks 82 and ejector pin 83 respectively, roof pressure subassembly 8 set up two sets of respectively with two sets of bending arms 7 cooperation to form 4 pinch points, ensure that valve 9 is compressing tightly the time, the atress is balanced, guarantees experimental reliability.
Further, the connecting plates 81 of the two sets of pressing assemblies 8 can be combined into an integral structure, and the two sets of bending arms 7 are connected into a whole at the same time, so that the action consistency is better.
In addition, when the valve is pressed, the piston rod 42 is retracted, when the valve is released, the piston rod extends, when the jacking component 8 is positioned at the first position to press the valve, the piston rod 42 is just fully retracted into the cylinder 41, the stroke is 0, and when the elastic telescopic connecting piece 5 swings past the dead point, the stress direction is changed, so that a limiting structure can be formed between the piston rod 42 and the cylinder 41, the valve 9 can be further pressed, and the test reliability is ensured.
The examples should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.
Claims (5)
1. The rapid clamping and loosening valve pressure test device comprises a frame (1), wherein a pressing blind plate (2) for performing a pressure test in cooperation with a valve (9) and a pressing mechanism for pressing and sealing the valve (9) and the pressing blind plate (2) are arranged on the frame (1);
the method is characterized in that: the pressing blind plate (2) is horizontally arranged on the frame (1), and the valve (9) to be tested is arranged on the pressing blind plate (2);
the compressing mechanism comprises a power source (4), an elastic telescopic connecting piece (5), a middle connecting rod (6), a bending arm (7) and a jacking component (8);
The power source (4) adopts a hydraulic cylinder or an air cylinder, and comprises a cylinder body (41) and a piston rod (42), wherein the cylinder body (41) is hinged on the frame (1);
The elastic telescopic connecting piece (5) comprises a lower connecting rod (51), an upper connecting rod (52) and an elastic piece, wherein the lower connecting rod (51) is in sliding fit with the upper connecting rod (52) and is connected with the upper connecting rod (52) through the elastic piece, the lower connecting rod (51) is hinged to the frame (1), the lower end of the lower connecting rod is hinged to the end part of the piston rod (42), the upper connecting rod (52) is hinged to the upper end of the middle connecting rod (6), the lower end of the middle connecting rod (6) is hinged to the middle part of the bending arm (7), one end of the bending arm (7) is hinged to the frame (1), and a jacking component (8) is arranged below the other end of the bending arm; the machine frame (1) comprises two side plates (11) which are arranged in parallel, and the two side plates (11) are connected through a plate rib (12); the power source (4) and the elastic telescopic connecting piece (5) are arranged between the two side plates (11); the middle connecting rod (6) and the bending arm (7) are respectively provided with two groups and are symmetrically arranged on the two side plates (11);
The jacking component (8) moves along with the bending arm (7) and is provided with a first position for compacting the valve (9) and a second position separated from the valve (9); when the hinge point P1 of the lower connecting rod (51) and the frame (1), the hinge point P2 of the middle connecting rod (6) and the bending arm (7) and the hinge point P3 of the upper connecting rod (52) and the middle connecting rod (6) are positioned on the same straight line, the dead point is a dead point position, when the jacking component (8) is positioned at the second position, the elastic component generates elastic force before the dead point position and drives the bending arm (7) upwards through the upper connecting rod (52) and the middle connecting rod (6), and when the jacking component (8) is positioned at the first position, the elastic component (5) swings through the dead point position, the elastic component generates elastic force and drives the bending arm (7) downwards through the upper connecting rod (52) and the middle connecting rod (6), so that the jacking component (8) compresses the valve (9), and the piston rod (42) is fully retracted into the cylinder body (41), and the stroke is 0.
2. The quick clamp release valve pressure test apparatus of claim 1, wherein: a disc spring cylinder (511) is fixed at the upper end of the lower connecting rod (51), and a guide sleeve (512) is fixed at the upper end of the disc spring cylinder (511);
The upper connecting rod (52) passes through the guide sleeve (512) and is in sliding fit with the guide sleeve (512), and a limit boss (521) is formed at the lower end of the upper connecting rod (52);
The elastic piece is a disc spring (53), the disc spring (53) is arranged in the disc spring cylinder (511) and sleeved on the upper connecting rod (52), and the upper end and the lower end of the disc spring (53) are respectively propped against the lower end face of the guide sleeve (512) and the limiting boss (521).
3. The quick clamp release valve pressure test apparatus of claim 1, wherein: the upper end of the upper connecting rod (52) is also provided with a movable block (522), a locating sleeve (523) and an operating hand wheel (524),
The movable block (522) is sleeved on the upper connecting rod (52) and hinged with the two groups of middle connecting rods (6);
The locating sleeve (523) and the operating hand wheel (524) are in threaded fit with the upper connecting rod (52), and the movable block (522) is clamped between the locating sleeve (523) and the operating hand wheel (524) and is in axial limit fit with the locating sleeve (523) and the operating hand wheel (524).
4. The quick clamp release valve pressure test apparatus of claim 1, wherein: the jacking component (8) comprises a connecting plate (81), an adjusting block (82) and a jacking rod (83); the connecting plate (81) is fixedly arranged on the bending arm (7), a long mounting groove (811) is formed in the connecting plate (81), the adjusting block (82) is arranged in the mounting groove (811), and the ejector rod (83) is arranged on the adjusting block (82).
5. The quick clamp release valve pressure test apparatus of claim 4, wherein: the top of the ejector rod (83) is connected with the adjusting block (82) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811294484.XA CN109141867B (en) | 2018-11-01 | 2018-11-01 | Valve pressure test device capable of being clamped and loosened rapidly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811294484.XA CN109141867B (en) | 2018-11-01 | 2018-11-01 | Valve pressure test device capable of being clamped and loosened rapidly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109141867A CN109141867A (en) | 2019-01-04 |
| CN109141867B true CN109141867B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811294484.XA Active CN109141867B (en) | 2018-11-01 | 2018-11-01 | Valve pressure test device capable of being clamped and loosened rapidly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109141867B (en) |
Citations (13)
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| JPH09272032A (en) * | 1996-04-04 | 1997-10-21 | Kanto Auto Works Ltd | Work clamping piece |
| CN202356906U (en) * | 2011-11-30 | 2012-08-01 | 昆山诺克科技汽车装备制造有限公司 | Four-connecting-rod dead point mechanism |
| CN202974575U (en) * | 2012-11-21 | 2013-06-05 | 浙江金盾消防器材有限公司 | Valve gas tightness test clamping device |
| CN203045219U (en) * | 2012-12-18 | 2013-07-10 | 成都埃森普特焊接设备有限责任公司 | Automation pressing mechanism |
| CN104369034A (en) * | 2014-11-18 | 2015-02-25 | 重庆川茂建材有限公司 | Workpiece pressing mechanism |
| CN106975950A (en) * | 2016-12-26 | 2017-07-25 | 天津博泰润腾环境工程有限公司 | A kind of industrial water purification process technique flow being easily installed |
| CN107116391A (en) * | 2017-05-14 | 2017-09-01 | 赵凯 | A kind of material feed clamping device of short axle |
| CN206605251U (en) * | 2017-02-07 | 2017-11-03 | 天津瑞祥贵和科技发展有限公司 | A kind of clamping device with auto-lock function |
| CN206936895U (en) * | 2017-05-02 | 2018-01-30 | 天津志信广博五金制品有限公司 | A kind of dome Workpiece clamping device |
| CN207771584U (en) * | 2017-12-07 | 2018-08-28 | 金翰阳科技（大连）股份有限公司 | A kind of polishing machine tool Flexible Fixturing device |
| CN108480828A (en) * | 2018-03-16 | 2018-09-04 | 江铃汽车股份有限公司 | A kind of multi link self-locking expansion power hold-down mechanism |
| CN207953640U (en) * | 2018-01-18 | 2018-10-12 | 武汉汉孚装备技术有限公司 | Clamp system and clamping device |
| CN208860593U (en) * | 2018-11-01 | 2019-05-14 | 秦皇岛中青冶金阀门有限公司 | A kind of device for valve pressure testing that Quick-clamped unclamps |
-
2018
- 2018-11-01 CN CN201811294484.XA patent/CN109141867B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09272032A (en) * | 1996-04-04 | 1997-10-21 | Kanto Auto Works Ltd | Work clamping piece |
| CN202356906U (en) * | 2011-11-30 | 2012-08-01 | 昆山诺克科技汽车装备制造有限公司 | Four-connecting-rod dead point mechanism |
| CN202974575U (en) * | 2012-11-21 | 2013-06-05 | 浙江金盾消防器材有限公司 | Valve gas tightness test clamping device |
| CN203045219U (en) * | 2012-12-18 | 2013-07-10 | 成都埃森普特焊接设备有限责任公司 | Automation pressing mechanism |
| CN104369034A (en) * | 2014-11-18 | 2015-02-25 | 重庆川茂建材有限公司 | Workpiece pressing mechanism |
| CN106975950A (en) * | 2016-12-26 | 2017-07-25 | 天津博泰润腾环境工程有限公司 | A kind of industrial water purification process technique flow being easily installed |
| CN206605251U (en) * | 2017-02-07 | 2017-11-03 | 天津瑞祥贵和科技发展有限公司 | A kind of clamping device with auto-lock function |
| CN206936895U (en) * | 2017-05-02 | 2018-01-30 | 天津志信广博五金制品有限公司 | A kind of dome Workpiece clamping device |
| CN107116391A (en) * | 2017-05-14 | 2017-09-01 | 赵凯 | A kind of material feed clamping device of short axle |
| CN207771584U (en) * | 2017-12-07 | 2018-08-28 | 金翰阳科技（大连）股份有限公司 | A kind of polishing machine tool Flexible Fixturing device |
| CN207953640U (en) * | 2018-01-18 | 2018-10-12 | 武汉汉孚装备技术有限公司 | Clamp system and clamping device |
| CN108480828A (en) * | 2018-03-16 | 2018-09-04 | 江铃汽车股份有限公司 | A kind of multi link self-locking expansion power hold-down mechanism |
| CN208860593U (en) * | 2018-11-01 | 2019-05-14 | 秦皇岛中青冶金阀门有限公司 | A kind of device for valve pressure testing that Quick-clamped unclamps |
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| Publication number | Publication date |
|---|---|
| CN109141867A (en) | 2019-01-04 |
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