CN214998169U - Piston type low-temperature liquid pump - Google Patents
Piston type low-temperature liquid pump Download PDFInfo
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- CN214998169U CN214998169U CN202120549571.6U CN202120549571U CN214998169U CN 214998169 U CN214998169 U CN 214998169U CN 202120549571 U CN202120549571 U CN 202120549571U CN 214998169 U CN214998169 U CN 214998169U
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- liquid inlet
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Abstract
The utility model relates to the technical field of cryogenic liquid pumps, in particular to a piston type cryogenic liquid pump, which comprises a vacuum cylinder body, a liquid inlet cylinder cover connected with the vacuum cylinder body, a liquid inlet valve arranged in the vacuum cylinder body and opposite to the liquid inlet cylinder cover, and a piston assembly arranged in the vacuum cylinder body and connected with the liquid inlet valve; the piston assembly comprises a cylinder sleeve which is arranged on the vacuum cylinder body and connected with the liquid inlet valve, a piston rod which can be movably connected with the cylinder sleeve, and a piston ring which can be movably connected with the piston rod and arranged on the vacuum cylinder body; the piston rod extends to the outside of the vacuum cylinder body; the utility model discloses set up piston assembly in cryogenic hydraulic pump's vacuum cylinder body, can be used to high pressure charge system, be fit for high pressure work, promote life greatly.
Description
Technical Field
The utility model relates to a cryogenic liquids pump technical field especially relates to a piston cryogenic liquids pump.
Background
The plunger pump is also called piston type low-temperature liquid pump, is a positive displacement pump and adopts a horizontal structure. Because LNG liquid is essentially incompressible, no pressure is essentially no flow. The piston type low-temperature liquid pump is used for a high-pressure pressurization system, the highest working pressure can reach 45MPa, and the piston type low-temperature liquid pump is mainly used for pressure regulating process flows. Suitable for the medium: the low-temperature liquid pump is liquid hydrogen, liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas and liquid carbon dioxide. When the existing low-temperature hydraulic pump is used, an unstable phenomenon exists when a high-pressure system is used, and the service life of the structure is short, so that the structure of the hydraulic pump needs to be further improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a set up piston assembly in cryogenic hydraulic pump's vacuum cylinder body, can be used to high-pressure charging system, be fit for high pressure work, promote life's piston cryogenic liquid pump greatly.
The utility model adopts the technical proposal that: a piston type low-temperature liquid pump comprises a vacuum cylinder body, a liquid inlet cylinder cover connected with the vacuum cylinder body, a liquid inlet valve arranged in the vacuum cylinder body and opposite to the liquid inlet cylinder cover, and a piston assembly arranged in the vacuum cylinder body and connected with the liquid inlet valve; the piston assembly comprises a cylinder sleeve which is arranged on the vacuum cylinder body and connected with the liquid inlet valve, a piston rod which can be movably connected with the cylinder sleeve, and a piston ring which can be movably connected with the piston rod and arranged on the vacuum cylinder body; the piston rod extends to the outside of the vacuum cylinder.
The vacuum cylinder body is provided with a liquid inlet cavity, the liquid inlet cylinder cover is provided with a liquid inlet, and the liquid inlet is communicated to the liquid inlet cavity.
The vacuum cylinder is further improved by arranging a liquid outlet which is communicated to the liquid inlet cavity.
The further improvement to the above scheme is that a compression nut is installed at one end, far away from the liquid inlet cylinder cover, of the vacuum cylinder body, and the piston rod is movably connected to the compression nut.
The liquid inlet valve comprises a liquid inlet baffle and a liquid inlet boss, the liquid inlet boss is connected to the cylinder sleeve, a liquid guide cavity is formed between the liquid inlet boss and the piston rod, and a liquid guide hole is formed in the cylinder sleeve and corresponds to the liquid outlet.
The liquid inlet boss is provided with a liquid inlet hole, and the liquid inlet hole is communicated to the liquid guide cavity.
The further improvement of the above scheme is that the inner diameter of the cylinder sleeve is provided with a movable cavity, the piston rod comprises a piston part and a movable part, the piston part is provided with a sealing piston, the sealing piston is movably connected with the movable cavity, and the movable part is movably connected with the piston ring.
The further improvement of the above scheme is that the sealing piston comprises a plurality of groups of first sealing grooves and at least one group of second sealing grooves, the first sealing grooves are sleeved with first piston rings, and the second sealing grooves are sleeved with second piston rings.
The further improvement of the scheme is that the surface of the movable part is plated with a chromium coating.
The scheme is further improved in that one end of the movable part, which is far away from the piston part, is provided with a wrench position; and a sealing ring is arranged on the outer diameter of the piston ring.
The utility model has the advantages that:
compare traditional cryogenic hydraulic pump, the utility model discloses set up piston assembly in cryogenic hydraulic pump's vacuum cylinder body, can be used to high-pressure charging system, be fit for high pressure work, promote life greatly, the practicality is strong. The vacuum cylinder body, the liquid inlet cylinder cover connected with the vacuum cylinder body, the liquid inlet valve arranged in the vacuum cylinder body and opposite to the liquid inlet cylinder cover, and the piston assembly arranged in the vacuum cylinder body and connected with the liquid inlet valve are arranged; the piston assembly comprises a cylinder sleeve which is arranged on the vacuum cylinder body and connected with the liquid inlet valve, a piston rod which can be movably connected with the cylinder sleeve, and a piston ring which can be movably connected with the piston rod and arranged on the vacuum cylinder body; the piston rod extends to the outside of the vacuum cylinder. The piston structure for the low-temperature liquid pump is matched with the piston rod through the cylinder sleeve to move, so that liquid can flow conveniently, the structure is practical and reliable, and the piston structure is particularly used in cooperation with the liquid pump.
Drawings
Fig. 1 is a schematic diagram of the internal structure of the piston type cryogenic liquid pump of the present invention;
fig. 2 is a schematic diagram of a piston assembly of the pistable cryogenic liquid pump of fig. 1.
Description of reference numerals: the liquid inlet valve comprises a vacuum cylinder body 1, a liquid inlet cavity 11, a liquid outlet 12, a compression nut 13, a liquid inlet cylinder cover 2, a liquid inlet 21, a liquid inlet valve 3, a liquid inlet baffle plate 31, a liquid inlet boss 32, a liquid inlet hole 321, a piston assembly 4, a cylinder sleeve 41, a liquid guide hole 411, a movable cavity 412, a piston rod 42, a piston part 421, a first sealing groove 421a, a second sealing groove 421b, a movable part 422, a wrench position 422a and a piston ring 43.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1-2, a piston type cryogenic liquid pump comprises a vacuum cylinder 1, a liquid inlet cylinder cover 2 connected to the vacuum cylinder 1, a liquid inlet valve 3 installed in the vacuum cylinder 1 and opposite to the liquid inlet cylinder cover 2, and a piston assembly 4 installed in the vacuum cylinder 1 and connected to the liquid inlet valve 3; the piston assembly 4 comprises a cylinder sleeve 41 which is arranged on the vacuum cylinder body 1 and is connected with the liquid inlet valve 3, a piston rod 42 which can be movably connected with the cylinder sleeve 41, and a piston ring 43 which can be movably connected with the piston rod 42 and is arranged on the vacuum cylinder body 1; the piston rod 42 extends to the outside of the vacuum cylinder 1
The vacuum cylinder body 1 is provided with a liquid inlet cavity 11, the liquid inlet cylinder cover 2 is provided with a liquid inlet 21, the liquid inlet 21 is communicated to the liquid inlet cavity 11 and used for leading in liquid through the liquid inlet 21, and operation of a liquid pump is facilitated.
The vacuum cylinder body 1 is provided with a liquid outlet 12, the liquid outlet 12 is communicated to the liquid inlet cavity 11, so that liquid can be conveniently guided out, and the liquid can be guided out through the liquid outlet 12 after entering the liquid inlet cavity 11.
The vacuum cylinder body 1 is far away from the end of the liquid inlet cylinder cover 2 and is provided with the compression nut 13, the piston rod 42 can be movably connected with the compression nut 13, and the compression nut 13 can ensure the piston rod 42 to move stably.
The liquid inlet valve 3 comprises a liquid inlet baffle plate 31 and a liquid inlet boss 32, the liquid inlet boss 32 is connected to a cylinder sleeve 41, a liquid guide cavity is formed between the liquid inlet boss 32 and a piston rod 42, a liquid guide hole 411 is formed in the cylinder sleeve 41, the liquid guide hole 411 corresponds to the liquid outlet 12, and specifically, the liquid guide cavity is matched with the liquid guide plate 31 to guide liquid out of the liquid guide hole 411.
The liquid inlet boss 32 is provided with a liquid inlet hole 321, the liquid inlet hole 321 is communicated to the liquid guide cavity, and the liquid inlet hole 321 is used for guiding liquid from the liquid inlet cavity 11 to the liquid guide cavity.
The cylinder liner 41 has an inner diameter opened with a movable chamber 412, the piston rod 42 includes a piston portion 421 and a movable portion 422, the piston portion 421 is provided with a sealing piston, the sealing piston is movably connected to the movable chamber 412, the movable portion 422 is movably connected to the piston ring 43, the movable chamber 412 is used for the piston portion 421 to move, and the piston ring 43 cooperates with the movable portion 422 to perform stable movement.
The sealing piston comprises a plurality of groups of first sealing grooves 421a and at least one group of second sealing grooves 421b, which are arranged on the piston part 421, the first sealing grooves 421a are sleeved with first piston rings, the second sealing grooves 421b are sleeved with second piston rings, and the sealing pistons are used for sealing protection through the matching of the sealing grooves and the piston rings.
The surface of the movable part 422 is plated with a chromium coating, so that the service life and the wear resistance are prolonged.
One end of the movable part 422 far away from the piston part 421 is provided with a wrench position 422 a; the outer diameter of the piston ring 43 is provided with a sealing ring. The sealing ring is matched with the piston ring 43 to realize stable transmission.
The utility model discloses set up piston assembly 4 in low temperature hydraulic pump's vacuum cylinder body 1, can be used to high pressure charge system, be fit for high pressure work, promote life greatly, the practicality is strong. Specifically, a vacuum cylinder body 1, a liquid inlet cylinder cover 2 connected with the vacuum cylinder body 1, a liquid inlet valve 3 arranged in the vacuum cylinder body 1 and opposite to the liquid inlet cylinder cover 2, and a piston assembly 4 arranged in the vacuum cylinder body 1 and connected with the liquid inlet valve 3 are arranged; the piston assembly 4 comprises a cylinder sleeve 41 which is arranged on the vacuum cylinder body 1 and is connected with the liquid inlet valve 3, a piston rod 42 which can be movably connected with the cylinder sleeve 41, and a piston ring 43 which can be movably connected with the piston rod 42 and is arranged on the vacuum cylinder body 1; the piston rod 42 extends to the outside of the vacuum cylinder 1. The piston structure for the low-temperature liquid pump performs piston motion by matching the cylinder sleeve 41 with the piston rod 42, so that liquid can flow conveniently, and the structure is practical and reliable and is particularly used in matching with a liquid pump.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A piston cryogenic liquids pump which characterized in that: the vacuum liquid feeding device comprises a vacuum cylinder body, a liquid feeding cylinder cover connected with the vacuum cylinder body, a liquid feeding valve arranged in the vacuum cylinder body and opposite to the liquid feeding cylinder cover, and a piston assembly arranged in the vacuum cylinder body and connected with the liquid feeding valve; the piston assembly comprises a cylinder sleeve which is arranged on the vacuum cylinder body and connected with the liquid inlet valve, a piston rod which can be movably connected with the cylinder sleeve, and a piston ring which can be movably connected with the piston rod and arranged on the vacuum cylinder body; the piston rod extends to the outside of the vacuum cylinder.
2. The piston cryogenic liquid pump of claim 1, wherein: the vacuum cylinder body is provided with a liquid inlet cavity, the liquid inlet cylinder cover is provided with a liquid inlet, and the liquid inlet is communicated to the liquid inlet cavity.
3. The piston cryogenic liquid pump of claim 2, wherein: the vacuum cylinder body is provided with a liquid outlet which is communicated to the liquid inlet cavity.
4. The piston cryogenic liquid pump of claim 3, wherein: and one end of the vacuum cylinder body, which is far away from the liquid inlet cylinder cover, is provided with a compression nut, and the piston rod is movably connected to the compression nut.
5. The piston cryogenic liquid pump of claim 4, wherein: the liquid inlet valve comprises a liquid inlet baffle and a liquid inlet boss, the liquid inlet boss is connected to the cylinder sleeve, a liquid guide cavity is formed between the liquid inlet boss and the piston rod, a liquid guide hole is formed in the cylinder sleeve, and the liquid guide hole corresponds to the liquid outlet.
6. The piston cryogenic liquid pump of claim 5, wherein: the liquid inlet boss is provided with a liquid inlet hole, and the liquid inlet hole is communicated to the liquid guide cavity.
7. The piston cryogenic liquid pump of claim 1, wherein: the piston rod comprises a piston part and a movable part, the piston part is provided with a sealing piston, the sealing piston is movably connected to the movable cavity, and the movable part is movably connected to a piston ring.
8. The piston cryogenic liquid pump of claim 7, wherein: the sealing piston comprises a plurality of groups of first sealing grooves and at least one group of second sealing grooves, the first sealing grooves are sleeved with first piston rings, and the second sealing grooves are sleeved with second piston rings.
9. The piston cryogenic liquid pump of claim 8, wherein: the surface of the movable part is plated with a chromium coating.
10. The piston cryogenic liquid pump of claim 9, wherein: one end of the movable part, which is far away from the piston part, is provided with a wrench position; and a sealing ring is arranged on the outer diameter of the piston ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120549571.6U CN214998169U (en) | 2021-03-17 | 2021-03-17 | Piston type low-temperature liquid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120549571.6U CN214998169U (en) | 2021-03-17 | 2021-03-17 | Piston type low-temperature liquid pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214998169U true CN214998169U (en) | 2021-12-03 |
Family
ID=79156669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120549571.6U Expired - Fee Related CN214998169U (en) | 2021-03-17 | 2021-03-17 | Piston type low-temperature liquid pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214998169U (en) |
-
2021
- 2021-03-17 CN CN202120549571.6U patent/CN214998169U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211203 |