CN102091532A - Connecting device for connecting membrane elements - Google Patents
Connecting device for connecting membrane elements Download PDFInfo
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- CN102091532A CN102091532A CN 201010586941 CN201010586941A CN102091532A CN 102091532 A CN102091532 A CN 102091532A CN 201010586941 CN201010586941 CN 201010586941 CN 201010586941 A CN201010586941 A CN 201010586941A CN 102091532 A CN102091532 A CN 102091532A
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- wheel hub
- end cap
- outer wheel
- jockey
- convex block
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- 239000012528 membrane Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000012360 testing method Methods 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 6
- 230000004927 fusion Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 238000003618 dip coating Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a connecting device for connecting membrane elements, which comprises a first end cover and a second end cover, wherein the first end cover comprises a first outer hub; at least one positioning lug is arranged at one side of the first outer hub; the second end cover comprises a second outer hub; and a positioning slot is arranged at one side of the second outer hub. When the first end cover is covered with the second end cover, the lug falls into the positioning slot, thereby preventing releasing the first end cover and the second end cover.
Description
Technical field
The application relates to a kind of jockey, especially, relates to a kind of jockey that is used for the junctional membrane element.
Background technology
In industry and domestic use of water process field, adopt membrane component that liquid is filtered usually or purify.Common membrane component has central collector pipe and twines the diffusion barrier of collector pipe.A kind of structure of existing membrane component in being the application for a patent for invention of CN101721912A, publication number is disclosed.
When the membrane component system moved, the use of usually a plurality of membrane components being connected was to improve aquifer yield and to cut down the consumption of energy.In the prior art, adopt the outside connector that the O RunddichtringO is housed that per two membrane components are connected, insert in the central collector pipe of two membrane components at the two ends of this connector, is tightly connected with formation.This connected mode in use easily causes the wearing and tearing and the distortion of O RunddichtringO of connector or damages the leakage that causes, and the product water water quality of whole system is affected.And, because insert in the central collector pipe end of connector, the internal diameter of connector is less than the internal diameter of central collector pipe, therefore, can there be the very big problem of the pressure loss through liquid effluent road in this connector to seeing through the mobile formation resistance of liquid, and the liquid in the central collector pipe narrows down because of runner when flowing through connector, make flow velocity accelerate suddenly, be unfavorable for the stable operation of membrane component system.And, because connector will insert respectively in the central collector pipe of two membrane components, brought inconvenience to installation, reduced installation effectiveness.
Summary of the invention
Provide a kind of jockey of membrane component according to the application's one side, having comprised: first end cap, comprise first outer wheel hub, a side of wherein described first outer wheel hub is provided with at least one locating convex block; And second end cap, comprising second outer wheel hub, a side of wherein described second outer wheel hub is provided with locating slot, wherein, when described first end cap and described second end cap fastening, described projection falls into described locating slot, threads off to prevent described first end cap and described second end cap.
Alternatively, described first outer wheel hub has external screw thread, and described second outer wheel hub has internal thread, and, in the fastening process of described first end cap and described second end cap, described external screw thread and described internal thread are rotatably connected, and described locating convex block can be with the described second outer wheel hub crimp.
Alternatively, described first outer wheel hub and described second outer wheel hub have loop configuration, and the interior diameter of described second outer wheel hub is greater than the overall diameter of described first outer wheel hub, and described locating convex block extends radially outwardly from the outer rim of described first outer wheel hub.
Alternatively, described first end cap comprises a plurality of locating convex blocks, and described a plurality of locating convex blocks distribute along the outer rim of described first outer wheel hub, and described second end cap comprises a plurality of locating slots, and the number of described locating slot is the integral multiple of described locating convex block number.
Alternatively, described first end cap comprises first inner wheel hub of annular, described first inner wheel hub end on surface within it comprises first taper seat, described first taper seat and described locating convex block lay respectively at the axial opposite side of described first end cap, and described second end cap comprises second inner wheel hub of annular, described second inner wheel hub end on surface within it comprises second taper seat, and described second taper seat and described locating slot lay respectively at the axial opposite side of described second end cap.
Alternatively, the coning angle of described first taper seat and described second taper seat is in the scope of 15～45 degree.
Alternatively, described first end cap comprises first inner wheel hub of annular, and described second end cap comprises second inner wheel hub of annular, and described second inner wheel hub comprises inboard bulge loop, and described inboard bulge loop has the annular groove that is used for fixing the O RunddichtringO on its outer peripheral edges.
Alternatively, described first inner wheel hub has first ring surface and second ring surface, when described first end cap and described second end cap are in buckling state, described first ring surface closely contacts with the inboard bulge loop of described second inner wheel hub, and the O RunddichtringO in the described annular groove is fixed in described second ring surface extruding.
Alternatively, described first inner wheel hub also has the 3rd ring surface in described second ring surface outside, when described first end cap and described second end cap are in buckling state, has the slit between the body of described the 3rd ring surface and described second inner wheel hub.
According to a further aspect in the invention, a kind of method of junctional membrane element is provided, comprise: first side of first end cap is connected with first membrane component, described first end cap has first outer wheel hub, and the side that described first outer wheel hub is relative with described first side is provided with at least one locating convex block; Second side of second end cap is connected with second membrane component, and described second end cap has second outer wheel hub, and the side that described second outer wheel hub is relative with described second side is provided with locating slot; And make described projection fall into described locating slot, so that described first end cap and described second end cap fasten.
Alternatively, described first outer wheel hub has external screw thread, and described second outer wheel hub has internal thread, and in the fastening process of described first end cap and described second end cap, described external screw thread and described internal thread are rotatably connected, and described locating convex block is with the described second outer wheel hub crimp.
According to another aspect of the invention, provide a kind of method that the jockey of membrane component is provided, having comprised: first end cap is provided, and described first end cap comprises first outer wheel hub, and a side of described first outer wheel hub is provided with at least one locating convex block; And second end cap is provided, and described second end cap comprises second outer wheel hub, a side of described second outer wheel hub is provided with locating slot, makes described projection fall into described locating slot, so that described first end cap and described second end cap fasten.
Utilization connects membrane component according to the application's jockey, can improve connection stability and reliability, and is convenient to install, and has improved installation effectiveness.
Description of drawings
Fig. 1 shows the jockey that is used for the junctional membrane element according to an embodiment of the application;
Fig. 2 A-2D schematically shows the fastening process according to two end caps of an embodiment jockey of the application;
Fig. 3 schematically shows according to an end cap of the jockey of an embodiment of the application cutaway view along AA line among Fig. 1; And
Fig. 4 schematically shows two end caps according to the jockey of an embodiment of the application in the mated condition between the inner wheel hub under the buckling state.
The specific embodiment
With reference to the accompanying drawings the embodiment according to the application is elaborated.
Orientation described in the application as upper and lower, left and right, top, bottom etc., all is meant the orientation in the accompanying drawing, and does not represent the orientation in the actual use.
Fig. 1 shows the jockey that is used for the junctional membrane element 1000 according to an embodiment of the application.As shown in Figure 1, jockey 1000 comprises end cap 1100 and end cap 1200, and end cap 1100 and 1200 comprises outer wheel hub 1110,1210 and inner wheel hub 1120,1220 respectively.Connect by many roots bar between the inner wheel hub of each end cap and the outer wheel hub.Because it is cylindrical that the central collector pipe of membrane component and shell are, therefore, the end cap 1100 shown in Fig. 1 and 1200 outer wheel hub 1110,1210 and inner wheel hub 1120,1220 are annular.Be appreciated that, if for some specific use, the central collector pipe of membrane component and shell are processed as triangular prism shaped, four prism type or multi-edge column-shaped, also can be designed to triangular prism shaped accordingly, four prism type or multi-edge column-shaped according to the inner wheel hub of each end cap of the application's jockey and outer wheel hub so.
When two membrane components are connected, at first end cap 1100 is connected by known ways such as bonding or fusion weld with an end of a membrane component respectively with 1200 separately close membrane component ends.
As the example that end cap is connected with membrane component, when two membrane components are connected, at first end cap 1100 is twined with an end of a membrane component by glass fiber dip-coating epoxy near the membrane component end and link to each other, the central collector pipe of this end of inner wheel hub 1120 and membrane component connecting part is connected by known ways such as bonding or fusion weld simultaneously, and end cap 1200 outmost turns are passed through glass fiber dip-coating epoxy near the membrane component end, and the other end or another membrane component one end of membrane component twine continuous therewith, the central collector pipe of this end of inner wheel hub 1220 and membrane component connecting part is connected by known ways such as bonding or fusion weld simultaneously, and many membrane component end caps all adopt mode of the same race to be connected with membrane component.
Then, two end caps 1100 and 1200 that different membrane components are cooperatively interacted snap together again, to realize the connection to two membrane components.Concrete manner will be in following detailed description.
According to the connected mode among the above embodiment, an end of a plurality of membrane components all can be connected end cap 1100, the other end all connects end cap 1200, thereby realizes being connected in series of a plurality of membrane components.
As shown in Figure 1, the interior diameter of outer wheel hub 1210 is greater than the overall diameter of outer wheel hub 1110, and when fastening, end cap 1100 and 1200 is rotatably connected by the external screw thread 1112 of outer wheel hub 1110 and the internal thread 1212 of outer wheel hub 1210.End cap 1100 also comprises locating convex block 1111, and locating convex block 1111 extends radially outwardly along outer wheel hub 1110.Has locating slot 1211 on the outer wheel hub 1210 of end cap 1200.
Fig. 2 A-2D schematically shows the fastening process according to two end caps of an embodiment jockey of the application.Shown in Fig. 2 A, when beginning to fasten operation, locating convex block 1111 and locating slot 1211 misalignments, at this moment, locating convex block 1111 relative to each other rotates outer wheel hub 1210 crimp radially outward along external screw thread 1112 that cooperatively interacts and internal thread 1212 to allow end cap 1100 and 1200.Fig. 2 B is the enlarged drawing of B part among Fig. 2 A.Shown in Fig. 2 B, in rotary course, outer wheel hub 1210 projection 1111 extruding that is positioned produces micro-strains.Shown in Fig. 2 C, when rotating to the position of locating convex block 1111 and locating slot 1211 alignings, locating convex block 1111 falls in the locating slot 1211, so that end cap 1100 and 1200 is when internal and external threads joins, two end cap fastens the location, prevent to thread off, and the connection of prompting fitting operation personnel membrane component puts in place.At this moment, the outer wheel hub 1210 that is extruded distortion recovers original shape, can not thread off and produce because of influence slippage from locating slot 1211 of pressure oscillation, water inlet impulse force or other external factor to guarantee locating convex block 1111.Fig. 2 D is the enlarged drawing of D part among Fig. 2 C.Shown in Fig. 2 D, after locating convex block 1111 and locating slot 1211 were aimed at and fall in it, outer wheel hub 1210 was extruded the part of distortion and recovers original shape, thereby locating convex block 1111 is fixed in the locating slot 1211.
By above description as can be seen, the jockey 1000 that the application provides provides the stable connection to membrane component, and this attended operation is convenient, and can prevent because pressure oscillation, water inlet impulse force or end cap dropout phenomenon that other external factor caused.
Be appreciated that end cap 1100 can comprise one or more locating convex blocks 1111, a plurality of locating convex blocks 1111 can increase the fastness that end cap connects.It will be appreciated by persons skilled in the art that a plurality of locating convex blocks 1111 can be evenly distributed on the outer rim of outer wheel hub 1110, also the deviation that can have in the machine-building to be allowed with respect to even distribution perhaps distributes unevenly at specific use.In addition, can have a plurality of locating slots 1211 on the outer wheel hub 1210.Alternatively, the number of locating slot 1211 is the integral multiple of locating convex block 1111 numbers.As shown in Figure 1, end cap 1100 has equally distributed 4 locating convex blocks 1111, and end cap 1200 has equally distributed 8 locating slots 1211, can improve the simplicity of assembling like this.
Fig. 3 schematically shows the cutaway view of end cap 1200 along AA line among Fig. 1.In Fig. 3, for the purpose of clear, and the internal thread on the outer wheel hub 1210 of not shown end cap 1200.As shown in figures 1 and 3, inner wheel hub 1120 and 1220 inner surface are the face of cylinder, its slightly larger in diameter is in the overall diameter of the central collector pipe of membrane component, thereby when end cap is connected by modes such as bonding or the windings of glass fiber dip-coating epoxy with an end of membrane component, central collector pipe is stretched in the inner wheel hub, fix by bonding or fusion weld in end cap and collector pipe contact position then and seal.Water has certain flow rate at this place to improve aquifer yield and to make in order to make the water inlet that inner wheel hub do not hinder central collector pipe end, and the lower end of the inner surface of inner wheel hub 1220 end of membrane component (that is, near) is configured to taper seat.According to the application's a embodiment, the coning angle of this taper seat is 15～45 degree, if this coning angle is too small, the inner surface of inner wheel hub 1220 will have influence on the water inlet of central collector pipe end; If this coning angle is excessive, then can influence the structural integrity of inner wheel hub 1220 and rib.In the embodiment shown in fig. 3, the coning angle of this taper seat is 30 degree.Similarly, the lower end of the inner surface of inner wheel hub 1120 (that is, near an end of membrane component) also is configured to taper seat, thereby makes water into have certain flow rate at this place and help water inlet near central collector pipe end regions to improve aquifer yield.According to the application's a embodiment, the coning angle of this taper seat also is 15～45 degree.
As shown in figures 1 and 3, the inner wheel hub 1220 of end cap 1200 comprises body 1221 and inboard bulge loop 1222.On the outer peripheral edges of inboard bulge loop 1222, has annular groove 1223.As shown in Figure 1, be fixed in the annular groove 1223 to 2000 tensionings of O RunddichtringO.The inner wheel hub 1120 of end cap 1100 has first ring surface 1121, second ring surface 1122 and the 3rd ring surface 1123 from the inside to the outside.As shown in Figure 4, behind end cap 1100 and 1200 assemblings and fastening, first ring surface 1121 of inner wheel hub 1120 closely contacts with the inboard bulge loop 1222 of inner wheel hub 1220, and the O RunddichtringO 2000 in the annular groove 1223 is fixed in second ring surface, 1122 extruding of inner wheel hub 1120, thereby guaranteed that end cap 1100 is connected the sealing of the inner surface of back inner wheel hub with 1200, can be not contaminated so that connect the pure water that between membrane component, flows the back.Alternatively, the height of O RunddichtringO 2000 is compressed 15% to 30%.Further, as shown in Figure 4, behind end cap 1100 and 1200 assemblings and fastening, has the slit between the 3rd ring surface 1123 of inner wheel hub 1120 and the body 1221 of inner wheel hub 1220, thereby make the hydraulic pressure of membrane component water inlet produce contention effect to O RunddichtringO 2000 by this slit, thereby produce even hydraulic pressure, be connected the sealing effectiveness of the inner surface of back inner wheel hub with 1200 further to guarantee end cap 1100 towards O RunddichtringO internal diameter direction.Alternatively, this slit is in the scope of 0.5mm to 2mm.
Describe the test result of employing below in detail according to the membrane component system of the jockey of an embodiment of the application.
The list that table 1 shows four 8 cun independent membrane components props up test result.Wherein, flux is represented the pure water output of membrane component central authorities collector pipe; Salt rejection rate is influent concentration and the difference of water outlet (pure water) concentration and the percentage of influent concentration; Pressure drop is represented to intake by the hydraulic pressure drop-out value behind the membrane component.Wherein, the intake pressure of every membrane component is 225psi, and the water inlet salinity is 2000ppm.
| The membrane component numbering | Flux (GPD) | Salt rejection rate |
| 8040-1 | 9969.25 | 99.449％ |
| 8040-2 | 10896.01 | 99.468％ |
| 8040-3 | 10666.92 | 99.543％ |
| 8040-4 | 10553.09 | 99.382％ |
Table 1: the list of four membrane components props up test result
Then, utilize jockey that above-mentioned four 8 cun membrane components are connected in series to together, carry out system's operation test once more, and the system that above-mentioned four membrane components are connected in series is compared with using traditional connector according to an embodiment of the application.Table 2 shows the test result of this system that is composed in series by four 8 cun membrane components.The intake pressure of this membrane component system is 225psi, water inlet salinity 2000ppm.
Table 2: the membrane component system testing result who is composed in series by four membrane components
As can be seen from Table 2, for different membrane component connected modes, the pure water output and the salt rejection rate of series connection membrane component system change all within the acceptable range.Can notice that it is smaller that four lists of flux ratio of series connection membrane component system prop up the test result summation of membrane component, and salt rejection rate is also a little less than the test result of single membrane component.This is because in the system after the membrane component series connection, the intake pressure in the membrane component of rear end descend and the water inlet salinity raising caused, be the phenomenon that meets rule.Slightly raise for system's salt rejection rate of use according to the more traditional connector connection of system's salt rejection rate of the application's jockey connection, this effect is because use has reduced the leakage at O RunddichtringO place according to the application's jockey, thereby has improved product water water quality.Simultaneously,, can significantly find out, adopt the system pressure drop of connecting to use the system pressure drop of traditional connector series connection to reduce by 11.5%, thereby reduced energy consumption according to the application's jockey for the pressure drop of system.And for utilizing initial testing and long-time running test according to the series connection membrane component system of the application's jockey all not to find leakage phenomenon, the fluctuation of pressure drop numerical value is also less.
More than the application's embodiment is described in detail, but the application is not limited to above-mentioned embodiment, various for a person skilled in the art conspicuous modifications and conversion still belong to the application's scope required for protection.
Claims (11)
1. the jockey of a membrane component comprises:
First end cap comprises first outer wheel hub, and a side of wherein described first outer wheel hub is provided with at least one locating convex block; And
Second end cap comprises second outer wheel hub, and a side of wherein described second outer wheel hub is provided with locating slot,
Wherein, when described first end cap and described second end cap fastening, described projection falls into described locating slot, threads off to prevent described first end cap and described second end cap.
2. jockey as claimed in claim 1, wherein, described first outer wheel hub has external screw thread, and described second outer wheel hub has internal thread, and
Wherein, in the fastening process of described first end cap and described second end cap, described external screw thread and described internal thread are rotatably connected, and described locating convex block is with the described second outer wheel hub crimp.
3. jockey as claimed in claim 1 or 2, wherein, described first outer wheel hub and described second outer wheel hub have loop configuration, and the interior diameter of described second outer wheel hub is greater than the overall diameter of described first outer wheel hub, and described locating convex block extends radially outwardly from the outer rim of described first outer wheel hub.
4. as each described jockey in the claim 1 to 3, wherein, described first end cap comprises a plurality of locating convex blocks, described a plurality of locating convex block distributes along the outer rim of described first outer wheel hub, and described second end cap comprises a plurality of locating slots, and the number of described locating slot is the integral multiple of described locating convex block number.
5. as each described jockey in the claim 1 to 4, wherein
Described first end cap comprises first inner wheel hub of annular, and described first inner wheel hub end on surface within it comprises first taper seat, and described first taper seat and described locating convex block lay respectively at the axial opposite side of described first end cap, and
Described second end cap comprises second inner wheel hub of annular, and described second inner wheel hub end on surface within it comprises second taper seat, and described second taper seat and described locating slot lay respectively at the axial opposite side of described second end cap.
6. jockey as claimed in claim 5, wherein, the coning angle of described first taper seat and described second taper seat is in the scope of 15～45 degree.
7. as each described jockey in the claim 1 to 6, wherein, described first end cap comprises first inner wheel hub of annular, described second end cap comprises second inner wheel hub of annular, described second inner wheel hub comprises inboard bulge loop, and described inboard bulge loop has the annular groove that is used for fixing the O RunddichtringO on its outer peripheral edges.
8. jockey as claimed in claim 7, wherein, described first inner wheel hub has first ring surface and second ring surface, when described first end cap and described second end cap are in buckling state, described first ring surface closely contacts with the inboard bulge loop of described second inner wheel hub, and the O RunddichtringO in the described annular groove is fixed in described second ring surface extruding.
9. jockey as claimed in claim 8, wherein, described first inner wheel hub also has the 3rd ring surface in described second ring surface outside, when described first end cap and described second end cap are in buckling state, has the slit between the body of described the 3rd ring surface and described second inner wheel hub.
10. the method for a junctional membrane element comprises:
First side of first end cap is connected with first membrane component, and described first end cap has first outer wheel hub, and the side that described first outer wheel hub is relative with described first side is provided with at least one locating convex block;
Second side of second end cap is connected with second membrane component, and described second end cap has second outer wheel hub, and the side that described second outer wheel hub is relative with described second side is provided with locating slot; And
Make described projection fall into described locating slot, so that described first end cap and described second end cap fasten.
11. the method that the jockey of membrane component is provided comprises:
First end cap is provided, and described first end cap comprises first outer wheel hub, and a side of described first outer wheel hub is provided with at least one locating convex block; And
Second end cap is provided, and described second end cap comprises second outer wheel hub, and a side of described second outer wheel hub is provided with locating slot,
Make described projection fall into described locating slot, so that described first end cap and described second end cap fasten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010586941 CN102091532A (en) | 2010-12-14 | 2010-12-14 | Connecting device for connecting membrane elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010586941 CN102091532A (en) | 2010-12-14 | 2010-12-14 | Connecting device for connecting membrane elements |
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|---|---|
| CN102091532A true CN102091532A (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010586941 Pending CN102091532A (en) | 2010-12-14 | 2010-12-14 | Connecting device for connecting membrane elements |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063916A (en) * | 2015-08-18 | 2015-11-18 | 平湖市当湖街道飞天人机械图文设计服务部 | Locating washer for workbench bottom foot of computerized embroidery machine |
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| CN201079733Y (en) * | 2007-08-30 | 2008-07-02 | 佳尼特(上海)纯水设备有限公司 | Reverse osmosis membrane element center pipe connector |
| CN201337330Y (en) * | 2008-08-29 | 2009-11-04 | 哈尔滨乐普实业发展中心 | Adapter device of film element |
| CN201505511U (en) * | 2009-09-12 | 2010-06-16 | 魏新时 | Locking plate group of plate-type ultrafiltration membrane component |
-
2010
- 2010-12-14 CN CN 201010586941 patent/CN102091532A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201079733Y (en) * | 2007-08-30 | 2008-07-02 | 佳尼特(上海)纯水设备有限公司 | Reverse osmosis membrane element center pipe connector |
| CN201337330Y (en) * | 2008-08-29 | 2009-11-04 | 哈尔滨乐普实业发展中心 | Adapter device of film element |
| CN201505511U (en) * | 2009-09-12 | 2010-06-16 | 魏新时 | Locking plate group of plate-type ultrafiltration membrane component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105063916A (en) * | 2015-08-18 | 2015-11-18 | 平湖市当湖街道飞天人机械图文设计服务部 | Locating washer for workbench bottom foot of computerized embroidery machine |
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