CN216588980U - Reciprocating type low-temperature booster pump - Google Patents
Reciprocating type low-temperature booster pump Download PDFInfo
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- CN216588980U CN216588980U CN202122690324.0U CN202122690324U CN216588980U CN 216588980 U CN216588980 U CN 216588980U CN 202122690324 U CN202122690324 U CN 202122690324U CN 216588980 U CN216588980 U CN 216588980U
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Abstract
The utility model discloses a reciprocating type low-temperature booster pump, which comprises a vacuum heat-insulating container, a piston pump, a connecting rod, a crank connecting rod, an energy storage element and a slideway, wherein the piston pump is arranged on the vacuum heat-insulating container; the piston pump comprises a movable part and a fixed part, is positioned in the vacuum heat-insulation container and is fixed with the inner wall of the vacuum heat-insulation container through the fixed part; one end of the connecting rod is in transmission connection with the driving mechanism through a crank connecting rod, and the connecting rod is made to do linear reciprocating motion along the slide way; the other end of the vacuum heat insulation container penetrates through the vacuum heat insulation container to be fixedly connected with the movable piece; one end of the energy storage element is fixed, and the other end of the energy storage element is fixed with the movable part, so that the connecting rod is always in a tensioned state when going upwards or downwards. The utility model realizes the linear motion of the connecting rod through the crank connecting rod and the slideway, and the application of the energy storage element is matched to realize that the connecting rod is always in a tension state, thereby avoiding the instability phenomenon easily caused by the compression of a slender structure of the connecting rod, reducing the diameter of the connecting rod to a certain extent and reducing the heat conduction quantity.
Description
Technical Field
The utility model relates to the technical field of pressurization in the low-temperature field, in particular to a reciprocating type low-temperature booster pump.
Background
Cryogenic liquids such as liquid helium, hydrogen, nitrogen, natural gas, etc. are typically stored in vacuum insulated vessels and used by withdrawing the cryogenic liquid from the vessel or by transferring the cryogenic liquid from one vessel to another, by pressurization. The low-temperature liquid pressurization is carried out in two modes, one mode is self-pressurization through low-temperature liquid evaporation, the pressurization capacity of the mode is low and is limited by the bearing capacity of a container for taking out the low-temperature liquid, the other mode is pressurization through a mechanical pressurization mode, the pressurization capacity is related to the type of a mechanical booster pump and is unrelated to the bearing capacity of the container for taking out the low-temperature liquid, the reciprocating type low-temperature liquid booster pump can realize 100MPa pressurization and is suitable for high-pressure pressurization of the low-temperature liquid, such as pressurization of liquid hydrogen in a hydrogen adding station.
In order to realize quick start, the reciprocating type low-temperature booster pump is divided into a low-temperature end and a high-temperature end, wherein the low-temperature end comprises a piston, a cylinder body, a liquid inlet and outlet valve and the like, the piston, the cylinder body, the liquid inlet and outlet valve and the like are immersed in low-temperature liquid, the temperature of the piston is the same as that of the low-temperature liquid, precooling is not needed when the piston is stopped and restarted, the high-temperature end comprises a motor, a motion conversion mechanism and the like, the motor is the same as the ambient temperature, the high-temperature end is connected with the low-temperature end through a connecting rod, and the temperature difference between the high-temperature end and the low-temperature end can reach 100-300 ℃. On the one hand, for reducing the heat conduction from the high temperature end to the low temperature end, need make into slender structure with the connecting rod, on the other hand the connecting rod need bear the power that promotes the piston, and the connecting rod pressurized of slender structure easily produces the unstability, and bearing capacity is low. In the reciprocating low-temperature booster pump, the bearing capacity of the connecting rod is ensured firstly, which causes the problem of large heat conduction loss.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is how to ensure the bearing capacity of the connecting rod without increasing the diameter of the connecting rod.
The utility model solves the technical problems through the following technical means:
a reciprocating type low-temperature booster pump comprises a vacuum heat-insulating container (108), a piston pump, a connecting rod (107), a crank connecting rod, an energy storage element (117) and a slideway (106);
the piston pump comprises a movable part and a fixed part, is positioned in the vacuum heat-insulation container (108) and is fixed with the inner wall of the vacuum heat-insulation container (108) through the fixed part; one end of the connecting rod (107) is in transmission connection with a driving mechanism through a crank connecting rod, so that the connecting rod (107) makes linear reciprocating motion along the slide way (106); the other end of the connecting rod (107) penetrates through the vacuum heat-insulating container (108) to be fixedly connected with the movable piece; one end of the energy storage element (117) is fixed, and the other end of the energy storage element is fixed with the movable piece, so that the connecting rod (107) is always in a tension state when going upwards or downwards.
The utility model realizes the linear motion of the connecting rod through the crank connecting rod and the slideway, and realizes that the connecting rod is always in a tension state by matching with the application of the energy storage element, thereby avoiding the instability phenomenon easily caused by the slender structure of the connecting rod, reducing the diameter of the connecting rod to a certain extent and reducing the heat conduction quantity.
Further, the piston pump comprises a cylinder (113) and a piston (116); the cylinder (113) is fixed with the inner wall of the vacuum heat-insulating container (108) to form the fixed part, and the piston (116) is fixed with the connecting rod (107) to form the movable part; the energy storage element (117) is positioned in the cylinder body (113), one end of the energy storage element is fixed with the bottom wall of the cylinder body (113), the other end of the energy storage element is fixed with the piston (116), the energy storage element (117) is always in a stretching state, and the compression or stretching direction of the energy storage element (117) is consistent with the reciprocating direction of the movable piece.
Further, the cylinder (113) is fixed with the inner wall of the vacuum heat insulation container (108) through a fixing device (112).
Further, the piston pump comprises a cylinder (113) and a piston (116), a piston rod of the piston (116) extends out of the cylinder (113) and is fixed with the bottom wall of the vacuum heat-insulation container (108) to form the fixed part, and the top of the cylinder (113) is fixed with a connecting rod (107) to form the movable part; one end of the energy storage element (117) is fixed with the inner wall of the vacuum heat insulation container (108), the other end of the energy storage element is fixed with the cylinder body (113), the energy storage element (117) is always in a compression state, and the compression or stretching direction of the energy storage element (117) is consistent with the reciprocating direction of the movable piece.
Furthermore, first fixed seats (118) perpendicular to the moving direction of the cylinder body (113) are symmetrically arranged on the inner wall of the vacuum heat-insulating container (108), and at least two first fixed seats (118) are annularly arranged on the outer wall of the cylinder body (113); and a second fixing seat (119) corresponding to the first fixing seat (118) extends from the bottom wall of the cylinder body (113) to two sides, and two ends of the energy storage element (117) are respectively fixed with the first fixing seat (118) and the second fixing seat (119).
Further, the energy accumulating element (117) is a spring.
Further, the cylinder body (113) is provided with a first liquid inlet and a first liquid outlet; the insulating vacuum container is provided with an air return port, a second liquid inlet and a second liquid outlet; the first liquid inlet and the first liquid discharge port are provided with one-way valves; the first liquid discharge port is connected with the second liquid discharge port through a hose; the air return port is arranged at the top of the vacuum heat insulation container (108), and the second liquid inlet is arranged at the bottom of the vacuum heat insulation container (108) and communicated with an external low-temperature liquid container.
Furthermore, the device also comprises a universal connector; the connecting rod (107) is rotationally fixed with the crank connecting rod through a universal connector; the universal connector is in sliding fit with the slide way.
Further, the crank connecting rod comprises a crank (103) and a connecting rod (104); one end of the crank (103) is fixed with the output end of the driving mechanism, the other end of the crank (103) is fixed with one end of the connecting rod (104) in a rotating mode, and the other end of the connecting rod (104) is fixed with the connecting rod (107) through the universal connector.
The utility model has the advantages that:
the utility model realizes the linear motion of the connecting rod through the crank connecting rod and the slideway, and realizes that the connecting rod is always in a tension state by matching with the application of the energy storage element, thereby avoiding the instability phenomenon easily caused by the slender structure of the connecting rod, reducing the diameter of the connecting rod to a certain extent and reducing the heat conduction quantity.
The first scheme is that the lower end of the connecting rod is fixed on a piston, a cylinder body is fixed on the inner surface of a heat-insulating vacuum container, and the piston reciprocates up and down. The lower part of the piston is connected with an energy storage element fixed at the bottom of the cylinder body. When the piston moves to the upper point, the energy storage element is in a stretching state, the energy storage element recovers to drive the piston to move downwards, the pressure in the cylinder body is reduced, the liquid inlet valve is opened, the liquid outlet valve is closed, and low-temperature liquid (such as liquid hydrogen) enters the cylinder body. When the piston moves to the lower point, the universal connector also moves to the lower point, the motor rotating shaft rotates to drive the universal connector to move upwards through the crank and the connecting rod, then the piston is driven to move upwards through the connecting rod, the pressure in the cylinder body is increased at the moment, the liquid inlet valve is closed, the liquid discharge valve is opened, and the liquid hydrogen is discharged out of the cylinder body and is collected through the liquid discharge pipe. In the whole up-and-down reciprocating motion of the piston, the connecting rod is always in a pulled state, so that the instability phenomenon easily caused by the slender structure of the connecting rod is avoided.
The second one is that the lower end of the connecting rod is fixed on the cylinder body, the piston is fixed on the inner surface of the heat-insulating vacuum container, and the cylinder body reciprocates up and down. The cylinder is connected to an energy storage element fixed to the inner surface of the heat-insulating vacuum container. When the cylinder body moves to the lower point, the universal connector also moves to the lower point, the motor rotating shaft rotates to drive the universal connector to move upwards through the crank and the connecting rod, then the cylinder body is driven to move upwards through the connecting rod, the pressure in the cylinder body is reduced at the moment, the liquid inlet valve is opened, the liquid discharge valve is closed, and the liquid hydrogen enters the cylinder body. When the cylinder body moves to the upper point, the energy storage element is in a compressed state, the energy storage element recovers to drive the cylinder body to move downwards, the pressure in the cylinder body increases at the moment, the liquid inlet valve is closed, the liquid discharge valve is opened, and the liquid hydrogen is discharged out of the cylinder body and is collected through the liquid discharge pipe. In the whole up-and-down reciprocating motion of the piston, the connecting rod is always in a pulled state, so that the instability phenomenon easily caused by the slender structure of the connecting rod is avoided.
Drawings
Fig. 1 is a schematic view showing the principle of a reciprocating cryopump in embodiment 1 of the present invention, in which the lower end of a connecting rod is fixed to a piston, and the piston reciprocates up and down;
fig. 2 is a schematic view showing the principle of a reciprocating cryopump according to embodiment 2 of the present invention, in which the lower end of a connecting rod is fixed to a cylinder body which reciprocates up and down;
the reciprocating type low-temperature booster pump 101 comprises a motor rotating shaft 102, a crank 103, a connecting rod 104, a universal connector 105, a slide way 106, a connecting rod 107, a vacuum heat insulation container 108, an air return pipe 109, an air inlet pipe 110, a liquid discharge pipe 111, a fixing device 112, a cylinder body 113, an air inlet valve 114, a liquid discharge valve 115, a piston 116, an energy storage element 117, a first fixing seat 118 and a second fixing seat 119.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1, the structure of this embodiment is shown in fig. 1.
In this embodiment, the cylinder 113 is disposed inside the vacuum insulation container 108, and the cylinder 113 is fixed to the inner surface of the vacuum insulation container 108 by the fixing means 112, and is integrally located at the lower half portion of the vacuum insulation container 108. The vacuum insulation vessel 108 has a cryogenic liquid inside, the cylinder 113 is completely submerged in the cryogenic liquid, and saturated vapor of the liquid is above the inside of the vacuum insulation vessel 108. The low-temperature liquid enters the vacuum heat-insulating container 108 through the liquid inlet pipe 110, and saturated steam of the low-temperature liquid is discharged out of the vacuum heat-insulating container 108 through the gas return pipe 109 for recycling. Wherein, the liquid inlet pipe 110 is arranged at the bottom of the vacuum heat insulation container 108, and the gas return pipe 109 is arranged at the top of the vacuum heat insulation container 108. The fixing means 112 in this embodiment is a bracket fixed inside the vacuum insulation container 108, and the cylinder 113 is seated on the bracket. The material of the bracket can be metal or other materials according to the requirement, and the cylinder body 113 and the bracket can be welded or fixed by bolts.
In this embodiment, an intake valve 114 and a discharge valve 115 are provided on the top of the cylinder 113. The cylinder 113 has a piston 116 and an energy storage member 117 inside, and the piston 116 moves up and down inside the cylinder 113. The lower surface of the piston 116 is connected to an energy accumulating member 117 fixed to the bottom of the cylinder 113, and the upper surface of the piston 116 is fixedly connected to a connecting rod 107 extending into the vacuum insulation container 108. The universal joint 105 is connected with the motor rotating shaft 102 through a connecting rod 104 and a crank 103, and the connection modes are hinged. The universal connector 105 is surrounded by the slideway 106 and is in sliding fit with the slideway 106, and due to the limitation of the slideway 106, the motor rotating shaft 102 can drive the crank 103 and the connecting rod 104 to swing around the vertical central line direction of the slideway 106 when rotating, and at the moment, the universal connector 105 moves up and down along the vertical central line direction of the slideway 106.
In the present embodiment, the operation cycle of the reciprocating type low-temperature booster pump 101 is divided into a liquid suction stage and a liquid discharge stage. The piston 116 moves from the piston to the upper point to the piston to the lower point in the suction phase, and the piston 116 moves from the piston to the lower point to the piston to the upper point in the discharge phase.
When the piston 116 moves to its upper point in this embodiment, the energy accumulating element 117 is in tension and the universal joint 105 moves to the point where it moves to the upper point. The energy storage element 117 is restored to drive the piston 116 to move downwards, at this time, the pressure inside the cylinder 113 is reduced, the liquid inlet valve 114 is opened, the liquid outlet valve 115 is closed, and the low-temperature liquid enters the inside of the cylinder 113 from the vacuum heat insulation container 108. This process continues until the piston 116 moves to its lower point, which is the suction phase.
In this embodiment, when the piston 116 moves to its lower point, the energy storage element 117 is in tension and the universal joint 105 moves to its lower point. The rotation of the motor shaft 102 drives the universal joint 105 to move upwards through the crank 103 and the connecting rod 104, and further drives the piston 116 to move upwards through the connecting rod 107, at this time, the pressure in the cylinder 113 increases, the liquid inlet valve 114 closes, the liquid outlet valve 115 opens, the low-temperature liquid in the cylinder 113 is discharged, and is extracted through the liquid outlet pipe 111. This process continues until the piston 116 moves to its upper point, which is the drain phase.
In this embodiment, the liquid suction stage and the liquid discharge stage of the reciprocating low-temperature booster pump 101 are alternately performed in accordance with the up-and-down movement of the piston 116. In the liquid suction stage, the connecting rod 107 is in a stretching state under the driving of the recovery of the energy storage element 117, and in the liquid discharge stage, the connecting rod 107 is in a stretching state under the driving of the universal connector 105. Therefore, the connecting rod 107 is always in a stretching state in the whole working period of the reciprocating type low-temperature booster pump 101, and the instability phenomenon of the connecting rod easily caused by the compression of the slender structure of the connecting rod is avoided. The elongated configuration of the connecting rod 107 will also substantially reduce the heat conduction from the high temperature end to the low temperature end.
In this embodiment, the energy storage element 117 is a spring or other parts with elastic energy storage function.
Embodiment 2, the structure of this embodiment is shown in fig. 2.
The difference between this embodiment and embodiment 1 is the mounting structure of the energy storage element 117 and the piston pump, specifically: in this embodiment, the piston 116 is a fixed member, the piston rod penetrates through the cylinder 113 and is fixed to the bottom wall of the vacuum insulation container 108, and the cylinder 113 is a movable member capable of moving up and down. The connecting rod 107 is fixed to the top of the cylinder 113. Two horizontal first fixing seats 118 are arranged on the inner wall of the vacuum heat insulation container 108, and are symmetrically arranged on two sides of the cylinder body 113 respectively, 2 second fixing seats 109 are extended outwards from the bottom of the cylinder body 113 and correspond to the first fixing seats 118 up and down respectively, and the upper end and the lower end of the energy storage element 117 are fixed on the first fixing seats 118 and the second fixing seats 119 respectively. In this embodiment, the energy storage element 117 is always pressurized, thereby ensuring that the cylinder 113 has a tendency to move downwards, thereby ensuring that the connecting rod is in tension. In this embodiment, the number of the energy storage elements may be 2, as shown in fig. 2, or 3 or more, and the energy storage elements are circumferentially distributed around the cylinder 113.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A reciprocating type low-temperature booster pump is characterized by comprising a vacuum heat-insulation container (108), a piston pump, a connecting rod (107), a crank connecting rod, an energy storage element (117) and a slideway (106);
the piston pump comprises a movable part and a fixed part, is positioned in the vacuum heat-insulation container (108) and is fixed with the inner wall of the vacuum heat-insulation container (108) through the fixed part; one end of the connecting rod (107) is in transmission connection with a driving mechanism through a crank connecting rod, so that the connecting rod (107) makes linear reciprocating motion along the slide way (106); the other end of the connecting rod (107) passes through the vacuum heat insulation container (108) and is fixedly connected with the movable piece; one end of the energy storage element (117) is fixed with the fixed part, and the other end of the energy storage element is fixed with the movable part, so that the connecting rod (107) is always in a tension state when going upwards or downwards.
2. The reciprocating cryogenic booster pump of claim 1 wherein the piston pump comprises a cylinder (113), a piston (116); the cylinder (113) is fixed with the inner wall of the vacuum heat-insulating container (108) to form the fixed part, and the piston (116) is fixed with the connecting rod (107) to form the movable part; the energy storage element (117) is positioned in the cylinder body (113), one end of the energy storage element is fixed with the bottom wall of the cylinder body (113), the other end of the energy storage element is fixed with the piston (116), the energy storage element (117) is always in a stretching state, and the compression or stretching direction of the energy storage element (117) is consistent with the reciprocating direction of the movable piece.
3. The reciprocating cryogenic booster pump of claim 2, wherein the cylinder body (113) is fixed to an inner wall of the vacuum insulation vessel (108) by a fixing means (112).
4. The reciprocating cryogenic booster pump of claim 1, wherein the piston pump comprises a cylinder (113) and a piston (116), a piston rod of the piston (116) extends out of the cylinder (113) and is fixed with the bottom wall of the vacuum insulation container (108) to form the fixed piece, and the top of the cylinder (113) is fixed with a connecting rod (107) to form the movable piece; one end of the energy storage element (117) is fixed with the inner wall of the vacuum heat insulation container (108), the other end of the energy storage element is fixed with the cylinder body (113), the energy storage element (117) is always in a compression state, and the compression or stretching direction of the energy storage element (117) is consistent with the reciprocating direction of the movable piece.
5. The reciprocating type cryogenic booster pump according to claim 4, wherein first fixing seats (118) perpendicular to the moving direction of the cylinder body (113) are symmetrically arranged on the inner wall of the vacuum heat insulation container (108), and at least two first fixing seats (118) are annularly arranged on the outer wall of the cylinder body (113); and a second fixing seat (119) corresponding to the first fixing seat (118) extends from the bottom wall of the cylinder body (113) to two sides, and two ends of the energy storage element (117) are respectively fixed with the first fixing seat (118) and the second fixing seat (119).
6. The reciprocating cryogenic booster pump of any of claims 1 to 5, wherein the energy accumulating element (117) is a spring.
7. The reciprocating type low-temperature booster pump according to any one of claims 2 to 5, wherein the cylinder body (113) is provided with a first liquid inlet and a first liquid outlet; the vacuum heat-insulating container (108) is provided with a gas return port, a second liquid inlet and a second liquid outlet; the first liquid inlet and the first liquid outlet are provided with one-way valves; the first liquid discharge port is connected with the second liquid discharge port through a hose; the air return port is arranged at the top of the vacuum heat insulation container (108), and the second liquid inlet is arranged at the bottom of the vacuum heat insulation container (108) and communicated with an external low-temperature liquid container.
8. The reciprocating type low-temperature booster pump according to any one of claims 1 to 5, further comprising a universal joint; the connecting rod (107) is rotationally fixed with the crank connecting rod through a universal connector; the universal connector is in sliding fit with the slide way.
9. The reciprocating cryogenic booster pump of claim 8, wherein the crank-link comprises a crank (103), a link (104); one end of the crank (103) is fixed with the output end of the driving mechanism, the other end of the crank (103) is fixed with one end of the connecting rod (104) in a rotating mode, and the other end of the connecting rod (104) is fixed with the connecting rod (107) through the universal connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690324.0U CN216588980U (en) | 2021-11-04 | 2021-11-04 | Reciprocating type low-temperature booster pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690324.0U CN216588980U (en) | 2021-11-04 | 2021-11-04 | Reciprocating type low-temperature booster pump |
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| Publication Number | Publication Date |
|---|---|
| CN216588980U true CN216588980U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122690324.0U Active CN216588980U (en) | 2021-11-04 | 2021-11-04 | Reciprocating type low-temperature booster pump |
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|---|---|
| CN (1) | CN216588980U (en) |
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2021
- 2021-11-04 CN CN202122690324.0U patent/CN216588980U/en active Active
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