CN215634102U - Novel general sealed supplementary device - Google Patents
Novel general sealed supplementary device Download PDFInfo
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- CN215634102U CN215634102U CN202121933882.9U CN202121933882U CN215634102U CN 215634102 U CN215634102 U CN 215634102U CN 202121933882 U CN202121933882 U CN 202121933882U CN 215634102 U CN215634102 U CN 215634102U
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- hydraulic cylinder
- end cover
- piston rod
- locking nut
- detachably connected
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Abstract
The utility model belongs to the technical field of mechanical equipment, and provides a novel universal sealing auxiliary device which comprises a hydraulic cylinder, wherein a through hole is formed in the hydraulic cylinder, the upper end of the hydraulic cylinder is detachably connected with a first end cover, and the lower end of the hydraulic cylinder is detachably connected with a second end cover; a piston rod is arranged on the first end cover, the piston rod extends into the hydraulic cylinder, and a piston is arranged at one end of the piston rod in the hydraulic cylinder; the end cover is detachably connected with the hydraulic cylinder, so that the assembly difficulty is reduced, the maintenance and the replacement are easy, a welding flange is omitted through a detachably connected structure in the equipment, the installation difficulty is further reduced, the production cost is reduced, and the working efficiency is improved; in conclusion, the utility model has the advantages of simple structure, high precision, convenient disassembly and maintenance, low production cost and high processing efficiency.
Description
Technical Field
The application relates to the technical field of mechanical equipment, in particular to a novel universal sealing auxiliary device.
Background
With the enhancement of environmental protection work, the leakage of toxic and harmful substances in industrial production is not allowed more and more, and a sealing auxiliary system is provided for better solving the leakage problem; the sealing auxiliary system is a necessary part for ensuring the normal work of the mechanical seal, and has the requirements of pressure, temperature, corrosion resistance and the like, and the performance grade of each part must exceed or be equivalent to the overall requirement of the system; in the prior art, a plurality of sealing auxiliary systems are provided, the most common sealing auxiliary device of a hydraulic cylinder is provided, the working principle of the sealing auxiliary device is very simple, namely, the pressure in a pump inlet or a reaction kettle is introduced into a second hydraulic cavity by utilizing the action area differential pressure of a first hydraulic cavity and a second hydraulic cavity in a rod hydraulic cylinder according to the pressure balance principle, so that the liquid sealing of the first hydraulic cavity obtains higher pressure, and the auxiliary sealing effect is achieved; however, the sealing assistance device in the prior art has the following problems:
1. one end of the hydraulic cylinder is sealed, the blind hole is difficult to process, and the precision cannot be guaranteed;
2. the assembly difficulty is high, and the maintenance and the replacement are very inconvenient;
3. one end of the hydraulic cylinder is welded with a flange, and special equipment and tools are needed for mounting the flange;
4. the production cost is high.
Therefore, a new technical solution is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The application provides a novel universal sealing auxiliary device which comprises a hydraulic cylinder, wherein a through hole is formed in the hydraulic cylinder, the upper end of the hydraulic cylinder is detachably connected with a first end cover, and the lower end of the hydraulic cylinder is detachably connected with a second end cover; and a piston rod is arranged on the first end cover, the piston rod extends into the hydraulic cylinder, and a piston is arranged at one end of the piston rod in the hydraulic cylinder.
As a preferable scheme, a first locking nut is arranged on the outer side of the upper end of the hydraulic cylinder, an upper external thread is arranged on the outer side of the upper end of the hydraulic cylinder, and an upper internal thread matched with the upper external thread is arranged on the inner side of the first locking nut; the inner side of the first locking nut is provided with a first end cover, and the first end cover is detachably connected with the first locking nut.
As a preferable scheme, a second locking nut is arranged on the outer side of the lower end of the hydraulic cylinder, a lower external thread is arranged on the outer side of the lower end of the hydraulic cylinder, and a lower internal thread matched with the lower external thread is arranged on the inner side of the second locking nut; and a second end cover is arranged on the inner side of the second locking nut and is detachably connected with the second locking nut.
Preferably, the outer side of the piston rod is provided with a GUS coating.
Preferably, the surface hardness of the piston rod is greater than or equal to HRC 60.
As a preferred scheme, the hydraulic cylinder adopts a seamless stainless steel pipe, and the through holes are equal-diameter through holes.
Preferably, a portion of the end cap contacting the piston rod is provided with a sealing means.
Due to the adoption of the technical scheme, compared with the prior art, the novel universal sealing auxiliary device is provided, the hydraulic cylinder adopts the through hole with the through ends, the processing is easy, the precision can be ensured, the end cover is detachably connected with the hydraulic cylinder, the assembly difficulty is reduced, the maintenance and the replacement are easy, a welding flange is omitted through the detachably connected structure in the equipment, the installation difficulty is further reduced, the production cost is reduced, and the working efficiency is improved; in addition, the GUS coating is arranged on the outer side of the piston rod, so that the hardness of the piston rod can be improved, the service life of the piston rod is prolonged, the resistance is very small, and the pressure change of the first hydraulic cavity can be caused by the small pressure change of the second hydraulic cavity, so that the piston rod is very sensitive; in conclusion, the utility model has the advantages of simple structure, high precision, convenient disassembly and maintenance, low production cost and high processing efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a left side view of FIG. 1;
reference numerals:
1. hydraulic cylinder 2, through hole 3, first end cover 4 and second end cover
5. Piston rod 6, piston 7, hydraulic pressure chamber I8, hydraulic pressure chamber II
9. The sealing device comprises a sealing device 10, a first locking nut 11 and a second locking nut.
Detailed Description
The following describes in detail a specific embodiment of the present invention with reference to fig. 1 and 2. It should be noted that the specific embodiments described herein are only for illustrating and explaining the present invention and are not to be construed as limiting the present invention.
The first embodiment is as follows:
the application provides a novel universal sealing auxiliary device which comprises a hydraulic cylinder 1, wherein a through hole 2 is formed in the hydraulic cylinder 1, namely the upper end and the lower end of the hydraulic cylinder 1 are communicated, the upper end of the hydraulic cylinder 1 is detachably connected with an end cover I3, and the lower end of the hydraulic cylinder 1 is detachably connected with an end cover II 4; a piston rod 5 penetrates through the middle of the end cover I3, specifically, a mounting hole is formed in the end cover I3, the piston rod 5 is mounted in the mounting hole, one end of the piston rod 5 is arranged in the through hole 2, and a piston 6 is arranged at one end of the piston rod 5 in the hydraulic cylinder 1; the piston 6 can reciprocate up and down in the hydraulic cylinder 1, namely the piston rod 5 reciprocates up and down along the end cover I3 to move linearly, the upper end of the piston 6 is a first hydraulic cavity 7, the first hydraulic cavity 7 is a rod cavity, the lower end of the piston is a second hydraulic cavity 8, the second hydraulic cavity 8 is a rodless cavity, the pressure difference of the action areas of the first hydraulic cavity 7 and the second hydraulic cavity 8 in the rod hydraulic cylinder is utilized, the second hydraulic cavity 8 is led into the pressure at the inlet of the pump or in the reaction kettle according to the pressure balance principle, so that the liquid sealing of the first hydraulic cavity 7 obtains higher pressure, and the auxiliary sealing effect is achieved; the first end cover 3 and the second end cover 4 are detachably connected with the hydraulic cylinder 1, so that the assembly difficulty is reduced, the maintenance and the replacement are easy, and a welding flange is omitted through a detachably connected structure in the equipment, so that the installation difficulty is further reduced, the production cost is reduced, and the working efficiency is improved;
preferably, in order to reduce the production cost, improve the work efficiency, reduce the production cycle, and improve the machining accuracy, the hydraulic cylinder 1 is made of a seamless stainless steel pipe, the through holes 2 are equal-diameter through holes, the through holes 2, i.e., both ends of the hydraulic cylinder, are open, so that general machining and precision grinding are facilitated, the through holes 2 have a mirror finish, which is easy to make, and the yield is improved.
Preferably, the part of the end cover I3, which is in contact with the piston rod 5, is provided with a sealing device 9; the sealing device 9 can adopt the sealing device in the prior art, such as a sealing ring, and the arrangement of the sealing device 9 can ensure that the resistance of the piston 6 and the piston rod 7 is small when the piston moves, so that the smooth operation is ensured.
Example two:
in the embodiment, the connection relationship between the upper end of the hydraulic cylinder 1 and the end cover I3 and the connection relationship between the lower end of the hydraulic cylinder 1 and the end cover II 4 are specifically limited; specifically, a first locking nut 10 is arranged on the outer side of the upper end of the hydraulic cylinder 1, an upper external thread is arranged on the outer side of the upper end of the hydraulic cylinder 1, and the upper external thread is coaxial with the hydraulic cylinder 1; an upper internal thread matched with the upper external thread is arranged on the inner side of the locking nut I10; the locking nut I10 is connected with the upper end of the hydraulic cylinder 1 through threads, and the locking nut I10 is screwed in and tightly pressed on the upper end of the hydraulic cylinder 1; preferably, in order to further improve the installation strength, an installation shoulder is arranged between the end cover one 3 and the locking nut one 10, when in installation, a part of the locking nut one 10 is screwed into the upper end of the hydraulic cylinder 1, the end cover one 3 is arranged on the inner side of the locking nut one 10, and the end cover one 3 is detachably connected with the upper nut 10, preferably in screw or bolt connection; one part of the periphery of the first end cover 3 is in contact with the inner side of the first locking nut 10, the other part of the periphery of the first end cover 3 is in contact with the inner side of the hydraulic cylinder 1, and a mounting shoulder is arranged at the contact part of the first end cover 3 and the top end of the hydraulic cylinder 1, so that the matching is more tight.
Similarly, a second locking nut 11 is arranged on the outer side of the lower end of the hydraulic cylinder 1, a lower external thread is arranged on the outer side of the lower end of the hydraulic cylinder 1, and the lower external thread is coaxial with the hydraulic cylinder 1; the inner side of the second locking nut 11 is provided with a lower internal thread matched with the lower external thread; the second locking nut 11 is connected with the lower end of the hydraulic cylinder 1 through threads, and the second locking nut 11 is screwed in and tightly pressed on the lower end of the hydraulic cylinder 1; when the hydraulic cylinder is installed, one part of a second locking nut 11 is screwed into the lower end of the hydraulic cylinder 1, a second end cover 4 is arranged on the inner side of the second locking nut 11, and the second end cover 4 is detachably connected with a second locking nut 14, preferably in a screw or bolt connection mode; one part of the periphery of the second end cover 4 is in contact with the inner side of the second locking nut 14, the other part of the periphery of the second end cover 4 is in contact with the inner side of the hydraulic cylinder 1, and a shoulder is arranged at the contact part of the second end cover 4 and the bottom end of the hydraulic cylinder 1, so that the matching is more tight.
The end cover I3 is inserted into the through hole 2 of the hydraulic cylinder 1, the end cover II 4 is inserted into the through hole 2 of the hydraulic cylinder 1, the end cover I3, the end cover II 4 and the through hole 2 are in very tight tolerance fit, and in addition, very precise form and position errors exist between inner holes of the end cover I3 and the end cover II 4 and a positioning excircle of the hydraulic cylinder 1, so that the inner hole of the hydraulic cylinder matched with the piston 6 and a mounting hole matched with the piston rod 5 are ensured, very high coaxiality can be achieved, the mechanical precision can be ensured, the requirements on assembly workers are low, and high assembly requirements are not needed.
Example three:
in this embodiment, the piston rod 5 is modified to have a higher hardness, specifically, the outer side of the piston rod 5 is provided with a GUS coating, so that the surface hardness of the piston rod 5 is greater than or equal to HRC 60; because the piston rod 5 is often stretched out when the pressure transmitter works, the piston rod 5 is exposed in the general environment of a chemical plant, dust is more, sand grains and the like are easy to cause surface scratches, therefore, a layer of GUS coating is sprayed on the surface of the piston rod 5, the surface hardness of the piston rod 5 reaches more than HRC60, the piston rod is precisely ground and polished to be the same as a mirror surface, and a sealing device with ultralow friction force is matched, so that when the piston 6 and the piston rod 5 move, the resistance is very small, and the pressure change of the hydraulic cavity I7 can be caused by the small pressure change of the hydraulic cavity II 8, and the pressure transmitter is very sensitive, and has very excellent performance; the utility model has the advantages of low production cost, short shelf life, strong pollution resistance and long service life.
Preferably, the surface hardness of the piston rod 5 is greater than or equal to HRC 60.
Due to the adoption of the technical scheme, compared with the prior art, the novel universal sealing auxiliary device is provided, the hydraulic cylinder 1 adopts the through hole 2 with two through ends, the processing is easy, the precision can be ensured, the end cover is detachably connected with the hydraulic cylinder 1, the assembly difficulty is reduced, the maintenance and the replacement are easy, a welding flange is omitted through a detachably connected structure in the equipment, the installation difficulty is further reduced, the production cost is reduced, and the working efficiency is improved; in addition, the GUS coating is arranged on the outer side of the piston rod 5, so that the hardness of the piston rod 5 can be improved, the service life of the piston rod 5 is prolonged, the resistance is very small, and the pressure change of the hydraulic cavity I7 can be caused by the small pressure change of the hydraulic cavity II 8, so that the piston rod is very sensitive; in conclusion, the utility model has the advantages of simple structure, high precision, convenient disassembly and maintenance, low production cost and high processing efficiency.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are included in the scope of protection of the present invention.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present application will not be described separately.
In addition, any combination of the various embodiments of the present application can be made, and the present application should be considered as disclosed in the present application as long as the combination does not depart from the spirit of the present application.
Claims (7)
1. A novel universal sealing auxiliary device comprises a hydraulic cylinder (1), and is characterized in that a through hole (2) is formed in the hydraulic cylinder (1), the upper end of the hydraulic cylinder (1) is detachably connected with a first end cover (3), and the lower end of the hydraulic cylinder (1) is detachably connected with a second end cover (4); and a piston rod (5) is arranged on the first end cover (3), one end of the piston rod (5) is arranged in the hydraulic cylinder (1), and a piston (6) is arranged at one end of the piston rod (5) in the hydraulic cylinder (1).
2. The novel universal sealing auxiliary device is characterized in that a first locking nut (10) is arranged on the outer side of the upper end of the hydraulic cylinder (1), an upper external thread is arranged on the outer side of the upper end of the hydraulic cylinder (1), and an upper internal thread matched with the upper external thread is arranged on the inner side of the first locking nut (10); the inner side of the first locking nut (10) is provided with a first end cover (3), and the first end cover (3) is detachably connected with the first locking nut (10).
3. The novel universal sealing auxiliary device is characterized in that a second locking nut (11) is arranged on the outer side of the lower end of the hydraulic cylinder (1), a lower external thread is arranged on the outer side of the lower end of the hydraulic cylinder (1), and a lower internal thread matched with the lower external thread is arranged on the inner side of the second locking nut (11); and a second end cover (4) is arranged on the inner side of the second locking nut (11), and the second end cover (4) is detachably connected with the second locking nut (11).
4. A new universal sealing aid according to claim 1, characterized in that the outside of the piston rod (5) is provided with a GUS coating.
5. A new universal sealing aid according to claim 1, characterized in that the surface hardness of the piston rod (5) is equal to or higher than HRC 60.
6. The novel universal sealing auxiliary device is characterized in that the hydraulic cylinder (1) is made of seamless stainless steel tubes, and the through holes (2) are equal-diameter through holes.
7. A novel universal sealing aid according to any one of claims 1 to 6, characterized in that the portion of the first end cap (3) in contact with the piston rod (5) is provided with a sealing means (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121933882.9U CN215634102U (en) | 2021-08-18 | 2021-08-18 | Novel general sealed supplementary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121933882.9U CN215634102U (en) | 2021-08-18 | 2021-08-18 | Novel general sealed supplementary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215634102U true CN215634102U (en) | 2022-01-25 |
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ID=79899073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121933882.9U Active CN215634102U (en) | 2021-08-18 | 2021-08-18 | Novel general sealed supplementary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215634102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024047865A1 (en) * | 2022-09-02 | 2024-03-07 | Smc株式会社 | Hydraulic cylinder |
-
2021
- 2021-08-18 CN CN202121933882.9U patent/CN215634102U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024047865A1 (en) * | 2022-09-02 | 2024-03-07 | Smc株式会社 | Hydraulic cylinder |
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