CN109900434B - Flywheel casing gas tightness detection equipment - Google Patents
Flywheel casing gas tightness detection equipment Download PDFInfo
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- CN109900434B CN109900434B CN201910205776.XA CN201910205776A CN109900434B CN 109900434 B CN109900434 B CN 109900434B CN 201910205776 A CN201910205776 A CN 201910205776A CN 109900434 B CN109900434 B CN 109900434B
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- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 103
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 15
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 7
- 230000003028 elevating effect Effects 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses flywheel housing air tightness detection equipment which comprises a water tank, a lifting device arranged in the water tank, a base moving up and down in the water tank through the lifting device, a first pressing device and a second pressing device arranged on the base, and a control switch for controlling the lifting device and the pressing devices, wherein the base is provided with a connecting hole for connecting an air pump output air pipe and an air outlet hole for injecting air into a closed cavity between a flywheel housing and the base, the outer side and the inner side of the flywheel housing arranged on the base are respectively pressed and fixed through the first pressing device and the second pressing device, and the flywheel housing pressed and fixed on the base is inflated through the air pump and then is lowered into the water tank through the lifting device for tightness detection. The automatic positioning, automatic pressing, automatic pressurizing and automatic detection of the flywheel shell can be realized, and the automatic detection device is simple in structure, simple and convenient to operate, small in size, high in working efficiency and good in sealing performance detection effect.
Description
Technical Field
The invention relates to air tightness detection equipment, in particular to flywheel casing air tightness detection equipment.
Background
At present, conventional bell housing leakproofness check out test set is by fixed mould, high pressure gas pump, these several parts of lifting device and water tank are constituteed, fixed mould generally by a plane level or have with the base of bell housing contour fit groove and several manual anchor clamps and locating pins of pushing down of installing on the base constitute, the base passes through steel wire or iron chain hoist and mount on the lifting device that can hoist such as driving, when monitoring bell housing leakproofness, place the bell housing on the base at first, fix a position through the locating pin, then install and press from both sides the anchor clamps through manual, open the air pump after compressing tightly and aerify the cavity between bell housing and the base, whether preliminary judgement leaks gas, use lifting device dress to hang whole vice base and bell housing and place in aqueous after that, through observing the bubble, detect the gas tightness of this product seal chamber.
The existing detection equipment and method are complex in operation and various in process, operators are required to operate the detection clamp for multiple times, different personnel, different methods and different forces have influence on the detection result of a product and the production efficiency of a workshop, the operator in the process is long in post time, and the operator is reluctant to select the process. Meanwhile, the current detection clamp limits the maximum pressure which can be borne by the test air pressure of the sealing cavity due to the compression mode, so that whether the part 030 of the flywheel shell leaks air or not can not be effectively detected, and the condition of wrong judgment can be caused.
Disclosure of Invention
In order to solve certain or some technical problems in the prior art, the invention provides the flywheel housing air tightness detection equipment which can realize automatic positioning, automatic pressing, automatic pressurizing and automatic detection of the flywheel housing, and has the advantages of simple structure, simplicity and convenience in operation, small size, high working efficiency and good sealing detection effect.
In order to solve the above-mentioned existing technical problem, the invention adopts the following scheme:
the utility model provides a bell housing gas tightness check out test set, includes the water tank, establishes elevating gear in the water tank, through elevating gear reciprocates in the water tank the base, establish first closing device and second closing device on the base, right elevating gear and closing device carry out the control switch that controls, be equipped with on the base and be used for connecting air pump air output pipe the connecting hole and to the bell housing with the venthole that seals cavity between the base carries out the gas injection is placed bell housing outside and inboard on the base are passed through respectively first closing device with second closing device compresses tightly fixedly, compresses tightly and fixes bell housing rethread after aerifing through the air pump on the base elevating gear descends to carry out the leakproofness in the water tank and detects.
Further, elevating gear is including establishing the first driver of water tank bottom, establishing guide post on the water tank lateral wall, install the bottom of base on the first driver, the side of base is equipped with the joint and is in guide post last draw-in groove, the base passes through the draw-in groove in-process of oscilaltion and follows in step the guide post slides.
Furthermore, first closing device is including establishing a plurality of second drivers on the base, establishing briquetting on the second driver, establishing establish the depression bar that compresses tightly the bell housing on the briquetting, the briquetting passes through the second driver reciprocates and rotates.
Furthermore, the second pressing device comprises a third driver arranged on the base, a central pressing plate arranged on the third driver, and a central pressing column arranged on the central pressing plate, and the periphery of a middle part hole of the flywheel shell is pressed and fixed through the central pressing column.
Furthermore, a mushroom head pull rod is arranged between the central pressing plate and the third driver, a dismounting hole is formed in the central pressing plate, and the central pressing plate is detachably fixed on the third driver through the pull rod.
Furthermore, the central pressing plates are Y-shaped structures, and the number of the central pressing plates is three, and the central pressing plates are respectively arranged at the bottom of the top end of the central pressing plate.
Further, the included angle of each extending section of the Y-shaped central pressing plate is 110 degrees, 110 degrees and 140 degrees.
Further, the first driver, the second driver and the third driver are one of an oil pressure cylinder or an air cylinder.
Furthermore, a pair of stroke inductive switches are respectively arranged on the base and the water tank, and the up-down lifting distance and position of the base relative to the water tank are controlled by the stroke inductive switches.
Furthermore, the travel induction switch comprises a first supporting rod arranged on the water tank, an upper line inductor and a lower line inductor which are arranged on the first supporting rod, a second supporting rod arranged on the base and a travel inductor arranged on the second supporting rod, and the first driver stops after being induced by the travel inductor and the upper line inductor or the lower line inductor in the up-and-down moving process.
Furthermore, a positioning groove is formed in the base, a sealing ring is arranged on the base or in the positioning groove, and the flywheel shell is quickly positioned on the base through the positioning groove.
Compared with the prior art, the invention has the beneficial effects that:
when the flywheel housing is subjected to air tightness detection, the flywheel housing is placed on the base and is pressed through the first pressing device and the second pressing device, then air is injected into a cavity between the flywheel housing and the base through the air pump, the whole flywheel housing is moved downwards into water in the water tank through the lifting device, whether the air tightness meets the requirement can be quickly judged through whether bubbles are emitted in the water, in the whole operation process, the pressing and the loosening of the flywheel housing are automatically controlled, people can realize automatic detection only by putting the flywheel housing on and taking the flywheel housing off, manual pressing operation is not needed, the detection efficiency of the flywheel housing is effectively improved, the labor intensity and the capability requirement on operators are reduced, the operation in the whole process is simple and convenient, and the sealing detection stability is high, the device has the advantages that the phenomenon of misjudgment caused by insufficient air pressure of the sealing cavity is avoided, the size is small, the effects of automatic positioning, automatic pressing, automatic pressurizing and automatic detection on the flywheel shell can be really realized through the detection device, the structure is simple, the operation is simple and convenient, the size is small, the working efficiency is high, and the sealing detection effect is good.
Drawings
FIG. 1 is a schematic structural view of the present invention with an upper flywheel housing installed;
FIG. 2 is a schematic structural view of the present invention without a flywheel housing;
FIG. 3 is a schematic view of the position relationship between the water tank and the lifting device according to the present invention;
in the figure: the device comprises a lifting device 1, a third driver 2, a water tank 3, a central pressure column 4, a central pressure plate 5, a control switch 6, a second pressing device 7, a first pressing device 8, a second driver 9, a pressing block 10, a pressing rod 11, a mushroom head pull rod 12, a second supporting rod 13, a stroke sensor 14, an upper line sensor 15, a first supporting rod 16, a lower line sensor 17, a stroke sensing switch 18, a connecting hole 19, a base 20, a dismounting hole 21, a clamping groove 22, a guide column 23, a first driver 24, an air outlet 25, a positioning groove 26, a sealing ring 27 and a flywheel shell 100.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1 to 3, a flywheel housing air tightness detection device comprises a water tank 3, a lifting device 1 arranged in the water tank 3, a base 20 moving up and down in the water tank 3 through the lifting device 1, a first pressing device 8 and a second pressing device 7 arranged on the base 20, and a control switch 6 for controlling the lifting device 1 and the pressing devices, be equipped with on the base 20 and be used for connecting the tracheal connecting hole 19 of air pump output and to flywheel shell 100 with the venthole 25 that seals the cavity between the base 20 and carry out the gas injection is placed flywheel shell 100 outside and inboard on the base 20 are respectively through first closing device 8 with second closing device 7 compresses tightly fixedly, compresses tightly to be fixed flywheel shell 100 on the base 20 aerifys the back rethread through the air pump elevating gear 1 descends to carry out the leakproofness in the water tank 3 and detects.
In the actual operation process, the first pressing device 8 and the second pressing device 7 are installed on the base 20 and used for pressing the flywheel core, the base 20 is installed in the water tank 3 through the lifting device 1, the whole base 20 can be deeply inserted into water or extend out of the water through the lifting device 1, the connecting hole 19 and the air outlet hole 25 are two ends of an air inlet channel, the connecting hole 19 is connected with an air pump, the air outlet hole 25 is communicated with the inside of a cavity of the flywheel housing 100, high-pressure inflation can be performed on a cavity to be detected in the flywheel housing 100 pressed on the base 20 through the connecting hole 19 and the air outlet hole 25, deflation can also be performed, the control switch 6 is provided with a plurality of functional keys which can automatically control the first pressing device 8, the second pressing device 7 and the lifting device 1 respectively, corresponding operation can be realized only by pressing a button such as ascending or descending or stopping or emergency stopping, corresponding operation can be realized by taking a program end P L C to control, when the tightness of the flywheel housing 100 needs to be detected, a tightness detection, a worker can detect whether the flywheel housing 100 is placed on the base 20 and can detect the tightness of the flywheel housing 100, the inside of the flywheel housing 100, and the flywheel housing 100, the automatic detection device, the detection device can detect whether the tightness of the manual operation of the flywheel housing 100, the manual detection device can detect the manual operation of the manual operation device, the manual operation of the manual operation device, the manual operation device can detect the manual operation of the manual operation device, the manual operation of the manual operation.
Preferably, the lifting device 1 includes a first driver 24 disposed at the bottom of the water tank 3 and a guide post 23 disposed on a side wall of the water tank 3, the bottom of the base 20 is mounted on the first driver 24, a clamping groove 22 clamped on the guide post 23 is disposed at a side edge of the base 20, and the base 20 slides along the guide post 23 synchronously through the clamping groove 22 during the up-and-down lifting process.
When the base 20 and the flywheel housing 100 are moved up and down by the lifting device 1, the first driver 24 is controlled by the control switch 6, so that the base 20 is directly moved up and down, meanwhile, the guide posts 23 are installed on the side wall of the water tank 3, the guide posts 23 are two and installed on the bilateral symmetry plane of the water tank 3, two side edges of the base 20 are slidably connected to the guide posts 23 through the clamping grooves 22, the base 20 is effectively guaranteed to move up and down freely, the side tilting is prevented, 2 up and down movable guide posts 23 are fixed on the water tank 3, the balanced lifting of the clamp base 20 can be guaranteed, the first driver 24 generally adopts one of an oil pressure cylinder or an air cylinder, the bottom of the base 20 is installed on a piston rod, the control is simpler and more convenient during the lifting, and the efficiency is higher.
Further, the first pressing device 8 comprises a plurality of second drivers 9 arranged on the base 20, a pressing block 10 arranged on the second drivers 9, and a pressing rod 11 arranged on the pressing block 10 and used for pressing the flywheel housing 100, and the pressing block 10 moves up and down and rotates through the second drivers 9.
The first pressing devices 8 can be arranged in a plurality of numbers, generally 6-8, for example, 8 first pressing devices 8 are arranged on a 030 flywheel shell 100, a second driver 9 in each first pressing device 8 is installed on a base 20, a pressing rod 11 is installed on each second driver 9 through a pressing block 10, the first pressing devices 8 are synchronously pressed or opened through a control switch 6, after the flywheel shell 100 is placed on the base 20, one-key opening and one-key pressing can be realized directly through the control switch 6, the operation is simple and convenient, the working efficiency is high, particularly, the second driver 9 generally adopts one of an oil pressure cylinder or an air cylinder, the pressing block 10 is installed on a piston rod, the pressing rod 11 is installed downwards on the pressing block 10, when pressing is needed, downward pressing of the flywheel shell 100 can be realized only through downward contraction of the telescopic rod, control is more simple and convenient when going up and down, and efficiency is higher, and especially when adopting the oil hydraulic cylinder operation, pressure is bigger, has guaranteed that the pressure that flywheel casing 100 every point received all is stable equilibrium, can make things convenient for the operative employee to operate again, can also carry out manual or autogiration to briquetting 10, when needs dismouting flywheel casing 100, can outwards rotate it to certain angle to avoid flywheel casing 100 to bump when the installation.
Meanwhile, the second pressing device 7 comprises a third driver 2 arranged on the base 20, a central pressing plate 5 arranged on the third driver 2, and a central pressing column 4 arranged on the central pressing plate 5, and the periphery of a middle part hole of the flywheel housing 100 is pressed and fixed through the central pressing column 4.
When the periphery of the inner side hole of the flywheel housing 100 is pressed by the second pressing device 7, the central pressing column 4 is installed on the third driver 2 through the central pressing plate 5, the central pressing plate 11 is pressed and released through the third driver 2, thereby realizing the internal and external pressing sealing of the flywheel casing 100, ensuring better stability during the sealing detection, the third driver 2 is one of an oil hydraulic cylinder or an air cylinder, a central pressure plate 5 is arranged on the piston rod, a central pressure column 4 is downwards arranged on the central pressure plate 5, when the flywheel shell needs to be pressed, the flywheel shell 100 can be pressed downwards by the central pressing column 4 only by the downward contraction of the telescopic rod, the control is simpler and more convenient when going up and down, and efficiency is higher, and especially when adopting the oil hydraulic cylinder operation, pressure is bigger, has guaranteed that the pressure that every point of bell housing 100 received is all stable balanced, can make things convenient for the operative employee to operate again.
Furthermore, a mushroom head pull rod 12 is arranged between the central pressing plate 5 and the third driver 2, a dismounting hole 21 is formed in the central pressing plate 5, and the central pressing plate 5 is detachably fixed on the third driver 2 through the pull rod.
In order to avoid the flywheel housing 100 from being unable to rotate in the installation process because the diameter of the central hole is smaller than that of the central pressing plate 5, the third driver 2 and the central pressing plate 5 are designed into a detachable structure, wherein an oval dismounting hole 21 is formed in the central pressing plate 5, the third driver 2 is connected with a mushroom head pull rod 12 in a rotating mode, when the mushroom head pull rod 12 rotates to a specific angle, the central pressing plate 5 can be upwards taken up through the dismounting hole 21, and after the mushroom head pull rod 12 rotates, the central pressing plate 5 can be locked on the third driver 2.
Especially central clamp plate 5 is Y type structure, central clamp plate 5 adopts three and sets up respectively the top bottom of central clamp plate 5 can go up and down many central clamp plates 5 with third driver 2 through one, makes depression bar 11 when compressing tightly flywheel shell 100, and pressure is more even, the Y type each extension contained angle of central clamp plate 5 is 110 °, 110 and 140, when compressing tightly flywheel shell 100, can make flywheel shell 100's leakproofness compare in the partition structure more stable.
Further, the first actuator 24, the second actuator 9 and the third actuator 2 are one of an oil pressure cylinder and an air cylinder.
Further, a pair of stroke inductive switches 18 are respectively arranged on the base 20 and the water tank 3, and the up-down lifting distance and position of the base 20 relative to the water tank 3 are controlled by the stroke inductive switches 18.
Still further, the travel induction switch 18 is including establishing first bracing piece 16 on the water tank 3, establishing last line inductor 15 and the lower line inductor 17 on the first bracing piece 16, establishing second bracing piece 13 on the base 20, establishing the travel inductor 14 on the second bracing piece 13, first driver 24 passes through in the process of moving up and down travel inductor 14 with last line inductor 15 or lower line inductor 17 stops after taking place the response.
In order to protect the service life of the lifting device 1, a stroke sensor 14, an upper line sensor 15 and a lower line sensor 17 are respectively arranged on the water tank 3 and the base 20, are used for determining the distance and the position of the base 20 for lifting up and down, and play a role of protecting the first driver 24, and the specific operation mode is as follows: the control switch 6 starts a lifting function, the first driver 24 rises to the stroke sensor 14 and the upper line sensor 15 and stops lifting after generating a sensing signal, so that the base 20 is positioned at an installation position of an operator (the first pressing device 8 and the second pressing device 7 are both in a loose state), the operator places the flywheel housing 100 on the clamp base 20, presses down a button of the control switch 6, so that the first pressing device 8 and the second pressing device 7 realize downward pressing on the flywheel housing 100, then high-pressure gas is flushed into the sealing cavity, the first driver 24 is lowered to the stroke sensor 14 and the lower line sensor 17 after being started again through the control switch 6, the model is sent out after being aligned and sensed, so that the base 20 is lowered into water, 10S is kept, the operator determines whether the sealing cavity has an air leakage phenomenon or not by observing whether bubbles are generated in the water tank 3, and the air pressure is released through the air release hole, meanwhile, after the flywheel housing 100 is lifted by the lifting device 1 again, the first pressing device 8 and the second pressing device 7 are opened, and finally, an operator takes down the flywheel housing 100 to finish detection.
Furthermore, a positioning groove 26 is arranged on the base 20, a sealing ring 27 is arranged on the base 20 or in the positioning groove 26, and the flywheel housing 100 is quickly positioned on the base 20 through the positioning groove 26.
Form a undercut with the anastomotic constant head tank 26 of flywheel casing 100 outline on base 20, can make flywheel casing 100 fix a position more simple and conveniently when placing, in order to place flywheel casing 100 and compress tightly the back on making base 20, can make the cavity of waiting of flywheel casing 100 to detect and can not appear leaking gas the phenomenon because of the face reason of placing of base 20, wholly lay one deck sealing washer 27 or place the sealing washer 27 of one deck customization in constant head tank 26 on base 20, after on sealing washer 27 is placed again to flywheel casing 100, then can effectually avoid the gas leakage problem, sealing washer 27 generally adopts the silica gel material, in whole operation process, can also recombine the locating pin and fix a position once more, make flywheel casing 100 and base 20's locate mode more diversified.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. The utility model provides a bell housing gas tightness check out test set which characterized in that: the device comprises a water tank, a lifting device arranged in the water tank, a base which moves up and down in the water tank through the lifting device, a first pressing device and a second pressing device which are arranged on the base, and a control switch for controlling the lifting device and the pressing devices, wherein the base is provided with a connecting hole for connecting an air pump output air pipe and an air outlet hole for injecting air into a closed cavity between a flywheel housing and the base;
the first pressing device comprises a plurality of second drivers arranged on the base, a pressing block arranged on the second drivers, and a pressing rod arranged on the pressing block and used for pressing the flywheel housing, and the pressing block moves up and down and rotates through the second drivers; the second pressing device comprises a third driver arranged on the base, a central pressing plate arranged on the third driver and a central pressing column arranged on the central pressing plate, and the periphery of a middle part hole of the flywheel shell is pressed and fixed through the central pressing column; a mushroom head pull rod is arranged between the central pressing plate and the third driver, a dismounting hole is formed in the central pressing plate, and the central pressing plate is detachably fixed on the third driver through the pull rod; the central pressing plate is of a Y-shaped structure, and the number of the central pressing plates is three, and the central pressing plates are respectively arranged at the bottom of the top end of the central pressing plate.
2. The flywheel housing airtightness detection apparatus according to claim 1, wherein: elevating gear is including establishing the first driver of water tank bottom, establishing guide post on the water tank lateral wall, install the bottom of base on the first driver, the side of base is equipped with the joint and is in draw-in groove on the guide post, the base passes through the draw-in groove in-process from top to bottom and follows in step the guide post slides.
3. The flywheel housing airtightness detection apparatus according to claim 2, wherein: the base and the water tank are respectively provided with a pair of stroke inductive switches, and the up-down lifting distance and position of the base relative to the water tank are controlled by the stroke inductive switches.
4. The flywheel housing airtightness detection apparatus according to claim 3, wherein: the travel induction switch comprises a first supporting rod arranged on the water tank, an upper line inductor and a lower line inductor which are arranged on the first supporting rod, a second supporting rod arranged on the base and a travel inductor arranged on the second supporting rod, wherein the first driver stops after being induced by the travel inductor and the upper line inductor or the lower line inductor in the up-and-down moving process.
5. The flywheel housing airtightness detection apparatus according to claim 1, wherein: the base is provided with a positioning groove, a sealing ring is arranged on the base or in the positioning groove, and the flywheel shell is quickly positioned on the base through the positioning groove.
6. The flywheel housing airtightness detection apparatus according to claim 2, wherein: further, the first driver, the second driver and the third driver are one of an oil pressure cylinder or an air cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910205776.XA CN109900434B (en) | 2019-03-18 | 2019-03-18 | Flywheel casing gas tightness detection equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205776.XA CN109900434B (en) | 2019-03-18 | 2019-03-18 | Flywheel casing gas tightness detection equipment |
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| CN109900434A CN109900434A (en) | 2019-06-18 |
| CN109900434B true CN109900434B (en) | 2020-08-04 |
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| CN112595462B (en) * | 2021-02-01 | 2024-07-09 | 十堰众柴发动机部件制造有限公司 | Flywheel casing leakage test device |
| CN116251807A (en) * | 2022-12-30 | 2023-06-13 | 芜湖东光大华机械制造有限公司 | A clamping device for cleaning a flexible flywheel |
| CN118794611B (en) * | 2024-09-11 | 2025-02-11 | 山东伟大工贸有限公司 | A flywheel housing air tightness detection device |
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| CN109900434A (en) | 2019-06-18 |
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Denomination of invention: Air tightness testing equipment for flywheel housing Effective date of registration: 20210319 Granted publication date: 20200804 Pledgee: Bank of Wenzhou Co.,Ltd. Hangzhou Yuhang sub branch Pledgor: HANGZHOU JIULONG MACHINERY MANUFACTURING Co.,Ltd. Registration number: Y2021330000220 |
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Date of cancellation: 20220222 Granted publication date: 20200804 Pledgee: Bank of Wenzhou Co.,Ltd. Hangzhou Yuhang sub branch Pledgor: Hangzhou Jiulong Machinery Manufacturing Co.,Ltd. Registration number: Y2021330000220 |
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Denomination of invention: Flywheel housing airtightness testing equipment Granted publication date: 20200804 Pledgee: Hangzhou branch of Bank of Nanjing Co.,Ltd. Pledgor: Hangzhou Jiulong Machinery Manufacturing Co.,Ltd. Registration number: Y2024980027542 |