CN219580265U - Separation membrane shell internal clearance adjusting device - Google Patents
Separation membrane shell internal clearance adjusting device Download PDFInfo
- Publication number
- CN219580265U CN219580265U CN202320291391.1U CN202320291391U CN219580265U CN 219580265 U CN219580265 U CN 219580265U CN 202320291391 U CN202320291391 U CN 202320291391U CN 219580265 U CN219580265 U CN 219580265U
- Authority
- CN
- China
- Prior art keywords
- piston
- adapter
- membrane
- membrane element
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a device for adjusting the internal clearance of a separation membrane shell, and belongs to the technical field of membrane separation. The problems that a certain gap exists between the adapter and the purified water outlet and between the adapter and the membrane element so that strong impact exists between the adapter and the membrane element and between the adapter and the purified water outlet, the adapter is easy to damage, and the service lives of other accessories are influenced are solved. The membrane element is arranged in the membrane shell, a high-pressure raw water cavity is formed between one end of the membrane element and one end of the membrane shell, the piston adapter and the piston sleeve are both arranged in the high-pressure raw water cavity, the water purifying outlet penetrates through one end of the membrane shell, a through hole of the membrane element, a through hole of the piston adapter and a through hole of the water purifying outlet are communicated, and a piston sealing ring is arranged on the piston adapter. It is mainly used for adjusting the internal clearance of the separation membrane shell.
Description
Technical Field
The utility model belongs to the technical field of membrane separation, and particularly relates to an internal gap adjusting device of a separation membrane shell.
Background
The membrane separation technology is an advanced separation, concentration and purification technology and is mainly applied to the technical field of water treatment. The membrane separation device has the core components of a membrane component, the membrane component consists of a membrane element and a membrane shell, the membrane element plays roles in separation, concentration and purification, the membrane shell plays roles in bearing the pressure required by the membrane element to work, and the safety and the reliability of the membrane component are vital to the whole device.
The main function of the adapter is to connect the membrane element with the purified water outlet through the adapter, and due to certain tolerance of the membrane shell and the membrane element in the production and processing process, certain clearance exists between the adapter and the purified water outlet and between the adapter and the membrane element due to the influence of accumulated tolerance after assembly. The most common method is to eliminate the gap by adding shims. During operation can extend under the effect of pressure the membrane shell, and the membrane element can be compressed, leads to the clearance unable complete elimination, because the production in clearance makes there is strong striking between adapter and membrane element and the water purification export, causes the damage of adapter very easily, influences the life of other accessories simultaneously.
Disclosure of Invention
In view of the above, the present utility model is directed to providing a device for adjusting the internal gap of a separation membrane housing, so as to solve the problem that the adaptor is damaged easily due to strong impact between the adaptor and the membrane element and between the adaptor and the purified water outlet due to a certain gap between the adaptor and the purified water outlet and between the adaptor and the membrane element, and the service life of other accessories is affected.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a separation membrane shell inside clearance adjusting device, it includes membrane shell, membrane element, piston adapter, piston sleeve and water purification export, membrane element sets up in the membrane shell, be equipped with high-pressure raw water cavity between the one end of membrane element and the one end of membrane shell, piston adapter and piston sleeve all set up in high-pressure raw water cavity, the one end that water purification export runs through the membrane shell sets up, the through-hole of membrane element, the through-hole of piston adapter and the through-hole of water purification export are linked together, the one end of piston adapter imbeds in the through-hole of membrane element and support on the terminal surface of membrane element, the other end slides and sets up in the through-hole of water purification export, be provided with the piston sealing washer on the piston adapter, piston adapter outside slip and spacer sleeve are equipped with the piston sleeve, piston sealing washer and the inner chamber wall contact and sliding fit of piston sleeve, the one end and the water purification export spiro union of piston sleeve, the other end and piston adapter sliding connection, the piston sleeve inner chamber of piston sealing washer one side that is close to the membrane element communicates with the through-hole of piston adapter, the piston sealing washer is kept away from the piston sleeve inner chamber of one side of membrane element and high-pressure raw water intercommunication.
Still further, the piston adapter is including the membrane element that connects gradually connects the pipe section, support section and water purification export and connect the pipe section, the membrane element that the pipe section of piston adapter inserts the through-hole setting of membrane element to the one end of support section and the terminal surface laminating setting of membrane element, the water purification export of piston adapter is taken over the pipe section sliding connection in the through-hole of water purification export, the piston seal sets up between support section and water purification export take over, the cavity that support section, piston seal and piston sleeve inner chamber constitute communicates with the through-hole of piston adapter, the cavity that water purification export is taken over pipe section, piston seal and piston sleeve inner chamber and is formed communicates with high-pressure raw water chamber.
Furthermore, a plurality of first communication holes are formed in one end, close to the piston sealing ring, of the support section of the piston adapter at intervals along the circumferential direction of the support section, and a cavity formed by the support section, the piston sealing ring and the inner cavity of the piston sleeve is communicated with the through hole of the piston adapter through the first communication holes.
Furthermore, a plurality of second communication holes are formed in one end, close to the purified water outlet, of the piston sleeve at intervals along the circumferential direction of the piston sleeve, and a cavity formed by the purified water outlet connecting pipe section, the piston sealing ring and the inner cavity of the piston sleeve is communicated with the high-pressure raw water cavity through the second communication holes.
Still further, the membrane housing includes body and end cover, the end pole sets up in body one end, the clean water export runs through the end cover setting, the high-pressure raw water chamber sets up between membrane element and end cover.
Furthermore, a plurality of high-pressure raw water inlets are uniformly arranged on the pipe body of the membrane shell at intervals along the circumferential direction, and the high-pressure raw water inlets are communicated with the high-pressure raw water cavity.
Further, a piston sleeve sealing ring is arranged between the piston sleeve and the supporting section of the piston adapter.
Further, the diameter of the support section of the piston adapter is greater than the diameter of the membrane element tube segment.
Further, the diameter of the piston sealing ring is larger than the diameter of the supporting section of the piston adapter and the diameter of the purified water outlet connecting pipe section.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the piston sleeve and the piston sealing ring are arranged at the piston adapter, so that the adapter can be ensured to synchronously move along with the membrane element under the action of pressure difference in the pressure increasing process, and the membrane element and the adapter can be slowly reset during pressure relief, so that the condition that the gap between the membrane element and the adapter damages the adapter under the action of pressure difference is avoided, meanwhile, the collision between all internal accessories is avoided, and the service life of the internal accessories is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of a gap adjusting device in a separation membrane housing according to the present utility model;
FIG. 2 is a schematic cross-sectional view showing the overall structure of a gap adjusting apparatus in a separation membrane housing according to the present utility model;
FIG. 3 is a schematic view showing the assembly of a piston adapter, a piston sleeve and a purified water outlet of a gap adjusting device in a separation membrane housing according to the present utility model;
FIG. 4 is a schematic view showing an initial state of a gap adjusting apparatus in a separation membrane housing according to the present utility model;
FIG. 5 is a schematic view showing a gap adjusting state of a gap adjusting device in a separation membrane housing according to the present utility model;
FIG. 6 is a schematic view of the membrane element of the gap adjusting device in the separation membrane housing according to the present utility model;
FIG. 7 is a schematic side view of the piston adapter of the separation membrane housing internal gap adjustment device according to the present utility model;
FIG. 8 is a schematic cross-sectional view showing the structure of a piston adapter of a separation membrane housing internal gap adjustment device according to the present utility model;
FIG. 9 is a schematic view of a piston sleeve of a gap adjusting device in a separation membrane housing according to the present utility model;
FIG. 10 is a schematic cross-sectional view showing the structure of a piston housing of a separation membrane housing internal gap adjustment device according to the present utility model;
FIG. 11 is a schematic view of a structure of a clean water outlet of a gap adjusting device inside a separation membrane housing according to the present utility model;
fig. 12 is a schematic cross-sectional view showing the structure of a purified water outlet of a gap adjusting device in a separation membrane housing according to the present utility model.
The device comprises a 1-membrane shell, a 2-membrane element, a 3-piston adapter, a 4-piston sleeve, a 5-purified water outlet, a 6-piston sealing ring, a 7-piston sleeve sealing ring, an 8-high-pressure raw water cavity and a 9-high-pressure raw water inlet.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It should be noted that, in the case of no conflict, embodiments of the present utility model and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.
Referring to fig. 1-12 for describing the present embodiment, an internal gap adjusting device of a separation membrane housing comprises a membrane housing 1, a membrane element 2, a piston adapter 3, a piston sleeve 4 and a purified water outlet 5, wherein the membrane element 2 is arranged in the membrane housing 1, a high-pressure raw water cavity 8 is arranged between one end of the membrane element 2 and one end of the membrane housing 1, the piston adapter 3 and the piston sleeve 4 are both arranged in the high-pressure raw water cavity 8, the purified water outlet 5 penetrates through one end of the membrane housing 1, the through hole of the membrane element 2, the through hole of the piston adapter 3 and the through hole of the purified water outlet 5 are communicated, one end of the piston adapter 3 is embedded in the through hole of the membrane element 2 and is abutted against the end face of the membrane element 2, the other end is slidingly arranged in the through hole of the purified water outlet 5, the piston adapter 3 is provided with a piston sealing ring 6, the outer side of the piston adapter 3 slides and the spacer sleeve is provided with a piston sleeve 4, the piston sealing ring 6 is in contact with the inner cavity wall of the piston sleeve 4 and is in sliding fit, one end of the piston sleeve 4 is in threaded connection with the purified water outlet 5, the other end of the piston sleeve is in sliding connection with the piston adapter 3, the inner cavity of the piston sleeve 4 on one side, close to the membrane element 2, of the piston sealing ring 6 is communicated with the through hole of the piston adapter 3, the inner cavity of the piston sleeve 4 on one side, far away from the membrane element 2, of the piston sealing ring 6 is communicated with a high-pressure raw water cavity 8, high-pressure raw water is arranged in the high-pressure raw water cavity 8, and low-pressure purified water is arranged in the through hole of the membrane element 2, the through hole of the piston adapter 3 and the through hole of the purified water outlet 5.
The assembly process of the embodiment is that firstly, a piston sealing ring 6 is installed on a piston adapter 3, a piston sleeve sealing ring 7 is installed on a piston sleeve 4 in the second step, the piston adapter 3 provided with the piston sealing ring 6 and the piston sleeve 4 provided with the piston sleeve sealing ring 7 are sleeved together in the third step, the piston sleeve 4 and a threaded matching surface of a purified water outlet 5 are rotationally screwed, and the assembled piston adapter 3, the piston sleeve 4, the purified water outlet 5, the piston sealing ring 6 and the piston sleeve sealing ring 7 are connected and assembled together with a membrane element 2 and a membrane shell 1 to form a membrane assembly.
In this embodiment, the piston adapter 3 includes a membrane element connecting pipe section, a support section and a water purifying outlet connecting pipe section that are sequentially connected, where the membrane element connecting pipe section of the piston adapter 3 is embedded in a through hole of the membrane element 2, and one end of the support section is attached to an end surface of the membrane element 2, the water purifying outlet connecting pipe section of the piston adapter 3 is slidably connected in the through hole of the water purifying outlet 5, the piston seal ring 6 is disposed between the support section and the water purifying outlet 5, a cavity formed by the support section, the piston seal ring 6 and an inner cavity of the piston sleeve 4 is communicated with the through hole of the piston adapter 3, and a cavity formed by the water purifying outlet connecting pipe section, the piston seal ring 6 and the inner cavity of the piston sleeve 4 is communicated with the high-pressure raw water cavity 8, in this embodiment, the membrane element connecting pipe section and the water purifying outlet connecting pipe section are respectively used for connection between the piston adapter 3 and the membrane element 2 and connection between the piston adapter 3 and the water purifying outlet 5, and the support section is used for supporting sliding of the piston sleeve 4 on the piston adapter 3, in this embodiment, the cavity of the piston sleeve 4 is divided into two cavities by the piston seal ring 6, and the two cavities are kept sealed relatively.
In this embodiment, a plurality of first communication holes are formed at one end, close to the piston seal ring 6, of the support section of the piston adapter 3 along the circumferential direction of the support section at intervals, and a cavity formed by the support section, the piston seal ring 6 and the inner cavity of the piston sleeve 4 is communicated with the through hole of the piston adapter 3 through the first communication holes, and in this embodiment, a cavity formed by the support section, the piston seal ring 6 and the inner cavity of the piston sleeve 4 is communicated with the through hole of the piston adapter 3 through the first communication holes to form a low-pressure cavity.
In this embodiment, a plurality of second communication holes are formed at one end of the piston sleeve 4, which is close to the purified water outlet 5, along the circumferential direction of the piston sleeve 4 at intervals, and a cavity formed by the purified water outlet pipe section, the piston sealing ring 6 and the inner cavity of the piston sleeve 4 is communicated with the high-pressure raw water cavity 8 through the second communication holes, and in this embodiment, the cavity formed by the purified water outlet pipe section, the piston sealing ring 6 and the inner cavity of the piston sleeve 4 is communicated with the high-pressure raw water cavity 8 through the second communication holes to form a high-pressure cavity.
In this embodiment, the membrane housing 1 includes a tube body and an end cover, the end rod is disposed at one end of the tube body, the purified water outlet 5 penetrates through the end cover, and the high-pressure raw water cavity 8 is disposed between the membrane element 2 and the end cover.
In this embodiment, a plurality of high-pressure raw water inlets 9 are uniformly arranged on the pipe body of the membrane housing 1 at intervals along the circumferential direction, the high-pressure raw water inlets 9 are communicated with the high-pressure raw water cavity 8, and the high-pressure raw water is introduced into the high-pressure raw water cavity 8 through the high-pressure raw water inlets 9.
In this embodiment, a piston sleeve sealing ring 7 is disposed between the piston sleeve 4 and the supporting section of the piston adapter 3, and the piston sleeve sealing ring 7 makes the inner cavity of the piston sleeve 4 keep sealed.
In this embodiment, the diameter of the supporting section of the piston adapter 3 is larger than the diameter of the membrane element connecting pipe section, and the diameter of the supporting section is larger than the diameter of the membrane element connecting pipe section, so that the part of the end surface of the supporting section, which is larger than the membrane element connecting pipe section, is kept fit with the end surface of the membrane element 2.
In this embodiment, the diameter of the piston sealing ring 6 is larger than the diameter of the supporting section of the piston adapter 3 and the diameter of the purified water outlet connecting pipe section, so as to ensure that the inner cavity of the piston sleeve 4 and the supporting section and the purified water outlet connecting pipe section form a corresponding cavity at intervals.
As shown in fig. 8, the division of the end surfaces in the piston adapter 3 into a, B, C, D, and E surfaces serves to explain the working principle of the present embodiment:
when at boost: the membrane element 2 is pressed, the A face, the C face and the E face of the piston adapter 3 are subjected to the pressure of low-pressure clean water, the B face and the D face of the piston adapter 3 are subjected to the pressure of high-pressure raw water, and the resultant force of the water pressures applied to the D face and the E face of the piston adapter 3 is designed to be larger than the resultant force of the water pressures applied to the A face, the B face and the C face, so that the piston adapter 3 has a leftward movement trend. When the membrane element 2 is deformed under pressure, high-pressure raw water is injected into the high-pressure cavity through the second communication hole on the piston sleeve 4, meanwhile, purified water in the low-pressure cavity is discharged through the first communication hole on the piston adapter 3, and the piston adapter 3 moves leftwards so as to ensure that the B surface of the adapter 3 is always attached to the membrane element 2.
When in pressure relief: the membrane element 2 resets, the raw water in the high-pressure cavity is discharged through the second communication hole on the piston sleeve 4, purified water enters through the first communication hole on the piston adapter 3, the piston adapter 3 moves rightwards to ensure that the B surface of the adapter 3 is always attached to the membrane element 2, damping generated by the water flow through the first communication hole on the piston adapter 3 and the second communication hole on the piston sleeve 4 is used for buffering, collision among various accessories is prevented, and the service life of the internal accessories is ensured.
The embodiments of the utility model disclosed above are intended only to help illustrate the utility model. The examples are not intended to be exhaustive or to limit the utility model to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model.
Claims (9)
1. An internal gap adjusting device of a separation membrane shell is characterized in that: the membrane element (2) is arranged in the membrane shell (1), a high-pressure raw water cavity (8) is arranged between one end of the membrane element (2) and one end of the membrane shell (1), the piston adapter (3) and the piston sleeve (4) are both arranged in the high-pressure raw water cavity (8), the water purifying outlet (5) penetrates through one end of the membrane shell (1), a through hole of the membrane element (2), a through hole of the piston adapter (3) and a through hole of the water purifying outlet (5) are communicated, one end of the piston adapter (3) is embedded in the through hole of the membrane element (2) and abuts against the end face of the membrane element (2), the other end of the piston adapter (3) is arranged in the through hole of the water purifying outlet (5) in a sliding mode, a piston sealing ring (6) is arranged on the piston adapter (3), the outer side of the piston adapter (3) slides and is provided with the piston sleeve (4) in a spacing mode, the piston sleeve (6) is in contact with the piston sleeve (4) and is in sliding mode with one end of the piston sleeve (4) and is in sliding mode, the other end of the piston sleeve is in contact with the piston sleeve (4) and is in sliding mode with one end of the piston sleeve (5), the inner cavity of the piston sleeve (4) at one side of the piston sealing ring (6) close to the membrane element (2) is communicated with the through hole of the piston adapter (3), and the inner cavity of the piston sleeve (4) at one side of the piston sealing ring (6) far away from the membrane element (2) is communicated with the high-pressure raw water cavity (8).
2. The separation membrane housing internal gap adjustment device according to claim 1, wherein: the piston adapter (3) comprises a membrane element connecting pipe section, a supporting section and a water purifying outlet connecting pipe section which are sequentially connected, wherein the membrane element connecting pipe section of the piston adapter (3) is embedded into a through hole of the membrane element (2), one end of the supporting section is in fit with the end face of the membrane element (2), the water purifying outlet connecting pipe section of the piston adapter (3) is slidably connected in the through hole of the water purifying outlet (5), the piston sealing ring (6) is arranged between the supporting section and the water purifying outlet (5) connecting pipe, a cavity formed by the supporting section, the piston sealing ring (6) and an inner cavity of the piston sleeve (4) is communicated with the through hole of the piston adapter (3), and the cavity formed by the water purifying outlet connecting pipe section, the piston sealing ring (6) and the inner cavity of the piston sleeve (4) is communicated with the high-pressure raw water cavity (8).
3. The separation membrane housing internal gap adjustment device according to claim 2, wherein: the one end that the support section of piston adapter (3) is close to piston seal (6) is provided with a plurality of first communication holes along support section circumference interval, the cavity that support section, piston seal (6) and piston sleeve (4) inner chamber are constituteed is through first communication hole and the through-hole intercommunication of piston adapter (3).
4. The separation membrane housing internal gap adjustment device according to claim 2, wherein: one end of the piston sleeve (4) close to the water purifying outlet (5) is provided with a plurality of second communication holes along the circumferential direction of the piston sleeve (4), and a cavity formed by the water purifying outlet connecting pipe section, the piston sealing ring (6) and the inner cavity of the piston sleeve (4) is communicated with the high-pressure raw water cavity (8) through the second communication holes.
5. The separation membrane housing internal gap adjustment device according to claim 1, wherein: the membrane shell (1) comprises a pipe body and an end cover, the end cover is arranged at one end of the pipe body, the purified water outlet (5) penetrates through the end cover, and the high-pressure raw water cavity (8) is arranged between the membrane element (2) and the end cover.
6. The separation membrane housing internal gap adjustment device according to claim 5, wherein: a plurality of high-pressure raw water inlets (9) are uniformly arranged on the pipe body of the membrane shell (1) at intervals along the circumferential direction, and the high-pressure raw water inlets (9) are communicated with the high-pressure raw water cavity (8).
7. A separation membrane housing internal gap adjustment apparatus according to claim 3, wherein: a piston sleeve sealing ring (7) is arranged between the piston sleeve (4) and the supporting section of the piston adapter (3).
8. The separation membrane housing internal gap adjustment device according to claim 2, wherein: the diameter of the support section of the piston adapter (3) is greater than the diameter of the membrane element connection section.
9. The separation membrane housing internal gap adjustment device of claim 8, wherein: the diameter of the piston sealing ring (6) is larger than the diameter of the supporting section of the piston adapter (3) and the diameter of the purified water outlet connecting pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320291391.1U CN219580265U (en) | 2023-02-23 | 2023-02-23 | Separation membrane shell internal clearance adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320291391.1U CN219580265U (en) | 2023-02-23 | 2023-02-23 | Separation membrane shell internal clearance adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219580265U true CN219580265U (en) | 2023-08-25 |
Family
ID=87665751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320291391.1U Active CN219580265U (en) | 2023-02-23 | 2023-02-23 | Separation membrane shell internal clearance adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219580265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713622A (en) * | 2021-10-14 | 2021-11-30 | 山东沣纳环保科技有限公司 | Adapter |
-
2023
- 2023-02-23 CN CN202320291391.1U patent/CN219580265U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713622A (en) * | 2021-10-14 | 2021-11-30 | 山东沣纳环保科技有限公司 | Adapter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219580265U (en) | Separation membrane shell internal clearance adjusting device | |
| CN103233876A (en) | Foldback coaxial gas booster pump and gas pressure creating method | |
| WO2019191041A3 (en) | Remotely operated fluid connection and seal | |
| CN203131272U (en) | Quick-release joint structure for pipe | |
| CN210502645U (en) | Novel ESC plunger pump structure of automotive electronics stable system | |
| CN111911474A (en) | Gasket pressure regulating overflow valve | |
| CN205504326U (en) | Hydraulic cushion system - structure for instrument | |
| CN217188320U (en) | Water-stopping structure of water path plate | |
| CN105422537B (en) | Pressure-increasing overflow valve | |
| CN201265516Y (en) | Sealing structure for membrane pump | |
| CN209757077U (en) | Vacuum booster assembly with brake pump | |
| CN210565042U (en) | Device for preventing venturi tube from extruding under high pressure | |
| CN203362104U (en) | Sand-up prevention packer | |
| CN112303044A (en) | Pressurizing oil cylinder | |
| CN216867613U (en) | Liquid return one-way valve | |
| CN111058949B (en) | Pressure-controlled oil drainage valve for starting of turboshaft engine and use method thereof | |
| CN110953133A (en) | Crankshaft connecting rod type radial piston pump capable of recycling pressure energy in waste fluid | |
| CN112065806A (en) | Hydraulic cylinder unloading structure | |
| CN114198227B (en) | Common rail of marine low-speed machine | |
| CN214579487U (en) | Sealing installation structure of electric three-way regulating valve | |
| CN105065363B (en) | High-precision lateral-force-resistant self-locking wind power hydraulic cylinder | |
| CN202892750U (en) | Piston type restoring preventing device | |
| CN217614041U (en) | Reverse osmosis membrane assembly and water purification equipment comprising same | |
| CN218564063U (en) | Self-protection disc spring type locking mechanism of hydraulic cylinder | |
| CN213419453U (en) | Self-balancing double-shell pump water outlet section sealing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |