CN212535971U - Hydraulic drive low-temperature reciprocating pump capable of reducing influence of low temperature on sealing position of piston rod - Google Patents
Hydraulic drive low-temperature reciprocating pump capable of reducing influence of low temperature on sealing position of piston rod Download PDFInfo
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- CN212535971U CN212535971U CN202021441936.5U CN202021441936U CN212535971U CN 212535971 U CN212535971 U CN 212535971U CN 202021441936 U CN202021441936 U CN 202021441936U CN 212535971 U CN212535971 U CN 212535971U
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Abstract
The utility model discloses a hydraulic drive low temperature reciprocating pump with reduce piston rod seal department and receive low temperature to influence, including cylinder body, the pump body and piston rod, its characterized in that: a low-temperature medium storage tank is arranged in the pump body, and an end cover fixedly connected with the pump body is arranged at an opening of the pump body; the cylinder body is arranged above the pump body, and one end of the piston rod penetrates through the end cover to extend into the cavity of the cylinder body and reciprocate in the cavity of the cylinder body; the piston rod is provided with a rubber sealing ring for oil sealing; and a heat-insulating radiation-proof protective sleeve is arranged between the cylinder body and the end cover. The utility model has the advantages of guarantee rubber seal's sealed life, prevent that pump body opening department of going out frosts, reduce friction between piston cylinder and the cavity.
Description
Technical Field
The utility model relates to a hydraulic drive low temperature reciprocating pump field specifically is a hydraulic drive low temperature reciprocating pump with reduce piston rod seal department and receive low temperature to influence.
Background
The hydraulic drive reciprocating pump has wide application, and compared with the traditional reciprocating pump, the hydraulic drive reciprocating pump removes the drive of a crank link mechanism, adopts hydraulic cylinder drive and hydraulic control, can have long stroke and low stroke frequency, and greatly improves the working performance. However, hydraulically driven reciprocating pumps also require a piston rod that reciprocates axially in the pump working chamber.
The hydraulically driven reciprocating pump described above has particular application to cryogenic pumps involving very high pressures. For example, cryogenic pumps for media such as liquid nitrogen or liquid methane, operate at very low ambient temperatures.
Hydraulic drive low temperature reciprocating pump, the drive end links to each other with the storage tank of cryogenic pump, and the piston rod sealing department of drive end generally uses the oil blanket sealed, because can receive the low temperature influence of low temperature medium on the piston rod of drive end, leads to the piston rod surface temperature of drive end to reduce to lead to oil blanket sealing department to receive microthermal influence, make polyurethane or rubber oil blanket elasticity reduce, whole oil blanket is sent out hard crisp, and sealed inefficacy causes revealing of hydraulic oil. The existing hydraulic drive low-temperature reciprocating pump increases the temperature area by lengthening the length of a piston rod, but because the volume of the piston rod is increased, the hydraulic power is unchanged, the activity frequency of the piston rod is reduced, the sealing position still can be influenced by certain low temperature, the influence of the surface temperature of a connecting rod is solved by an electric heating mode, and the structure of the electric heating is complex.
Disclosure of Invention
The utility model provides a be not enough to prior art, the utility model provides a hydraulic drive low temperature reciprocating pump with reduce piston rod seal department and receive low temperature to influence has solved the problem that proposes in the above-mentioned background art.
In order to realize the purpose, the utility model discloses a following technical scheme realizes:
a hydraulic drive low-temperature reciprocating pump capable of reducing the influence of low temperature on the sealing position of a piston rod comprises a cylinder body, a pump body and a piston rod, wherein the pump body comprises a vacuum storage tank and a pump body end cover, and an opening of the vacuum storage tank is fixedly connected with the pump body end cover; the cylinder body is arranged above the pump body, and one end of the piston rod penetrates through the end cover of the pump body to extend into the cavity of the cylinder body and reciprocate in the cavity of the cylinder body; a sealing ring for oil sealing is arranged on the piston rod; the cylinder body with be equipped with thermal-insulated radiation protection protective sheath between the pump body end cover.
Preferably, thermal-insulated radiation protection protective sheath includes connecting portion and extension, connecting portion are used for connecting the cylinder body with the pump body end cover, the extension with pump body end cover opening phase-match.
Preferably, the extension portion is embedded in the opening of the pump body end cover, a first groove is formed in the bottom end of the connecting portion, a first sealing gasket is arranged in the first groove, and the bottom end of the connecting portion is connected with the top end of the pump body end cover in a sealing mode through the first sealing gasket.
Preferably, a second groove is formed in the top end of the connecting portion, a second sealing gasket is arranged in the second groove, and the connecting portion is connected with the bottom end of the cylinder body in a sealing mode through the second sealing gasket.
Preferably, the thermal-insulated radiation protection protective sheath the cylinder body with pump body end cover all is equipped with the bolt hole, thermal-insulated radiation protection protective sheath the cylinder body with pass through the bolt hole between the pump body end cover it is fixed.
Preferably, the inner wall of the heat-insulating radiation-proof protective sleeve is not in contact with the surface of the piston rod.
Compared with the prior art, the beneficial effects of the utility model are that:
by additionally arranging the heat-insulating radiation-proof protective sleeve between the cylinder body and the pump body end cover, the influence of low temperature of the pump body end cover on the oil seal position of the piston rod in the cylinder body can be reduced, the sealing life of the sealing ring is ensured, and heat leakage and frosting at the opening position of the pump body end cover can be prevented; the inner wall of the heat-insulating radiation-proof protective sleeve is not contacted with the surface of the piston rod, so that the friction of the piston rod moving in the cavity is reduced. The utility model has the advantages of guarantee the sealed life-span of sealing washer, prevent that the pump body opening department of going out frosts, reduce friction between piston rod and the cavity.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an enlarged schematic structural diagram of a point a in fig. 1 according to the present invention.
In the figure: 1-cylinder body, 2-pump body, 3-piston rod, 4-pump body end cover, 5-sealing ring, 6-heat-insulating radiation-proof protective sleeve, 7-vacuum storage tank, 8-connecting part, 9-extending part, 10-first groove, 11-bolt hole, 12-bolt, 13-first sealing gasket, 14-second groove, 15-second sealing gasket, 16-liquid outlet pipe and 17-liquid outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, the utility model provides a technical scheme: a hydraulic drive low-temperature reciprocating pump capable of reducing low-temperature influence on a piston rod sealing position comprises a cylinder body 1, a pump body 2 and a piston rod 3, wherein the pump body 2 comprises a vacuum storage tank 7 and a pump body end cover 4, and low-temperature media with extremely low temperature, such as liquid nitrogen or liquid methane and the like, are filled in the vacuum storage tank 7; the opening of the pump body 2 is provided with a pump body end cover 4; the pump body end cover 4 is fixedly connected to the opening end of the pump body 2 through screws, a plurality of screw holes are distributed in the pump body end cover in a circle center array mode and do not penetrate through the liquid outlet pipe 13, the pump body 1 is arranged above the pump body 2, and one end of the piston rod 3 penetrates through the pump body end cover 4 to extend into the cavity of the pump body 1 and does reciprocating motion in the cavity of the pump body 1; a heat-insulating radiation-proof protective sleeve 6 is arranged between the cylinder body 1 and the pump body end cover 4, the heat-insulating radiation-proof protective sleeve 6 is made of materials with good heat-insulating property, epoxy resin, electrical bakelite and the like can be used, a sealing ring 5 is arranged on the piston rod 3, the sealing ring 5 is positioned in a groove at the top end of the connecting part 8, a gap at one end is reserved in the groove so as to facilitate the compression of the sealing ring 5, and clean grease is coated on the contact surface of the sealing ring 5 and the piston rod 3; the heat-insulating radiation-proof protective sleeve 6 comprises a connecting part 8 and an extending part 9, the connecting part 8 and the extending part 9 are integrally connected, the extending part 9 is embedded in the opening of the pump body end cover 4, a first groove 10 is formed in the bottom end of the connecting part 8, and a first sealing gasket 13 is arranged in the first groove 10, so that the bottom end of the connecting part 8 is hermetically connected with the top end of the pump body end cover 4 through the first sealing gasket 13; a second groove 14 is formed in the top end of the connecting portion 8, a second sealing gasket 15 is arranged in the second groove 14, the connecting portion 8 is connected with the bottom end of the cylinder body in a sealing mode through the second sealing gasket 15, and gaps for pressing the first sealing gasket 13 and the second sealing gasket 15 are reserved at the connecting portion of the connecting portion 8; a plurality of matched bolt holes 11 are distributed in an annular array mode on the heat-insulating radiation-proof protective sleeve 6, the cylinder body 1 and the pump body end cover 4, do not penetrate through the liquid outlet pipe 13, and penetrate through the bolt holes 11 through bolts 12 to be fixedly connected.
Be equipped with drain pipe 16 in the pump body 2, press the inside low temperature medium of vacuum storage tank 7 downwards through piston rod 3, impress low temperature medium in drain pipe 16, carry low temperature medium away from liquid outlet 17, at this moment, 3 lower extremes of piston rod are extremely low owing to the temperature in stretching into low temperature medium, because low temperature medium flows in drain pipe 16, the pump body end cover 4 part temperature that is located near drain pipe 16 is extremely low, because pump body end cover 4 does not have good heat-proof quality, make pump body end cover 4 be close to that drain pipe 16 one side top surface temperature is lower, and cylinder body 1 is the normal atmospheric temperature. A heat-insulating radiation-proof protective sleeve 6 is arranged between the pump body end cover 4 and the cylinder body 1, so that the influence of low temperature on the top surface of the pump body end cover 4 on the sealing position of the sealing ring can be reduced, the failure of an oil seal due to low temperature is prevented, the sealing service life of the sealing ring is ensured, and the heat leakage and frosting at the opening of the pump body end cover 4 can also be prevented; the extension part 9 of the heat-insulating radiation-proof protective sleeve 6 extends downwards into the cavity of the opening of the pump body end cover 4, so that the influence of low temperature at the lower end of the piston rod 3 on the sealing part can be reduced to a certain extent, and the sealing failure is prevented; the inner wall of the heat-insulating radiation-proof protective sleeve 6 is not contacted with the surface of the piston rod 3, so that the friction of the piston rod 3 in the cavity during movement is reduced.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a hydraulic drive cryogenic reciprocating pump with it is influenced by low temperature to reduce piston rod seal department, includes cylinder body (1), pump body (2) and piston rod (3), its characterized in that: the pump body (2) comprises a vacuum storage tank (7) and a pump body end cover (4), and an opening of the vacuum storage tank (7) is fixedly connected with the pump body end cover (4); the cylinder body (1) is arranged above the pump body (2), and one end of the piston rod (3) penetrates through the pump body end cover (4) to extend into the cavity of the cylinder body (1) and reciprocate in the cavity of the cylinder body (1); a sealing ring (5) for oil sealing is arranged on the piston rod (3); and a heat-insulating radiation-proof protective sleeve (6) is arranged between the cylinder body (1) and the pump body end cover (4).
2. A hydraulically driven cryogenic reciprocating pump with reduced cold effects at piston rod seals as claimed in claim 1 wherein: thermal-insulated radiation protection cover (6) are including connecting portion (8) and extension (9), connecting portion (8) are used for connecting cylinder body (1) with pump body end cover (4), extension (9) with pump body end cover (4) opening phase-match.
3. A hydraulically driven cryogenic reciprocating pump with reduced cold effects at piston rod seals as claimed in claim 2 wherein: the pump body end cover (4) is provided with an opening, the extending portion (9) is embedded in the opening of the pump body end cover (4), the bottom end of the connecting portion (8) is provided with a first groove (10), a first sealing gasket (13) is arranged in the first groove (10), and the bottom end of the connecting portion (8) is connected with the top end of the pump body end cover (4) in a sealing mode through the first sealing gasket (13).
4. A hydraulically driven cryogenic reciprocating pump with reduced cold effects at piston rod seals as claimed in claim 2 wherein: the top end of the connecting part (8) is provided with a second groove (14), a second sealing gasket (15) is arranged in the second groove (14), and the connecting part (8) is connected with the bottom end of the cylinder body (1) in a sealing mode through the second sealing gasket (15).
5. A hydraulically driven cryogenic reciprocating pump with reduced cold effects at piston rod seals as claimed in claim 1 wherein: thermal-insulated radiation protection cover (6) cylinder body (1) with pump body end cover (4) all are equipped with bolt hole (11), thermal-insulated radiation protection cover (6) cylinder body (1) with pass through bolt (12) between pump body end cover (4) bolt hole (11) are fixed.
6. A hydraulically driven cryogenic reciprocating pump with reduced cold effects at piston rod seals as claimed in claim 1 wherein: the inner wall of the heat-insulating radiation-proof protective sleeve (6) is not in contact with the surface of the piston rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021441936.5U CN212535971U (en) | 2020-07-21 | 2020-07-21 | Hydraulic drive low-temperature reciprocating pump capable of reducing influence of low temperature on sealing position of piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021441936.5U CN212535971U (en) | 2020-07-21 | 2020-07-21 | Hydraulic drive low-temperature reciprocating pump capable of reducing influence of low temperature on sealing position of piston rod |
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| Publication Number | Publication Date |
|---|---|
| CN212535971U true CN212535971U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021441936.5U Active CN212535971U (en) | 2020-07-21 | 2020-07-21 | Hydraulic drive low-temperature reciprocating pump capable of reducing influence of low temperature on sealing position of piston rod |
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| CN (1) | CN212535971U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542427A (en) * | 2022-04-26 | 2022-05-27 | 杭州新亚低温科技有限公司 | Zero suction pressure head cryogenic liquid pump |
-
2020
- 2020-07-21 CN CN202021441936.5U patent/CN212535971U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542427A (en) * | 2022-04-26 | 2022-05-27 | 杭州新亚低温科技有限公司 | Zero suction pressure head cryogenic liquid pump |
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