Horizontal cryogenic liquid pump

Abstract

The utility model provides a horizontal low-temperature liquid pump which comprises a motor, a pump body, a base, a sliding seat and a low-friction plate, the motor is fixedly installed on the sliding seat, the sliding seat is arranged above the base, and the low-friction plate is arranged between the lower end of the sliding seat and the upper end of the base. The sliding seat is connected with the base through a second connecting bolt; a first adjusting hole is formed in the upper end of the base, a second adjusting hole is formed in the lower end of the sliding seat, and a second connecting bolt penetrates through the first adjusting hole and the second adjusting hole simultaneously. According to the utility model, the low-friction plate is arranged between the sliding seat and the base, so that the sliding seat and the motor can slide and synchronously move along with the pump body when the pipeline deforms and generates axial force on the pump body, and therefore, the internal force between the motor and the pump body can be effectively reduced, and the relative movement between the motor and the pump body can be reduced; therefore, the influence on the fit clearance of the motor and parts in the pump body is reduced, and the equipment performance and the service life are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a horizontal cryogenic liquid pump. Background Art

[0002] Common single-stage or two-stage cryogenic liquid centrifugal pumps in air separation units usually have a coaxial design for the motor and pump body. Expansion joints are installed on the inlet and outlet pipes of the pump body, and the motor is directly installed on the support base or concrete foundation.

[0003] Before starting a cryogenic liquid centrifugal pump, the pump body and piping must be cooled. Typically, within 1.5-2 hours, the pump body and piping cool from ambient temperature to a minimum of -196°C. The contraction of the piping pulls the pump body toward the fixed point of the piping. Once the pump is started, the internal pressure rises to operating pressure. Due to this pressure, the piping will slightly stretch, causing the pump to shift again.

[0004] Although the existence of the expansion joint can form a certain buffer between the pipeline and the pump body, and reduce part of the force on the pump body caused by the temperature deformation of the pipeline; however, in actual operation, the axial force is still very large, and the pump body is easily affected by the pipeline; and because the motor is directly fixed, the force of the pipeline on the pump body will cause a certain relative displacement between the motor and the pump body, and form a large internal force between the motor and the pump body; when the pipeline expands, the internal force manifests as a pulling force of the pump body on the motor, that is, the motor and the pump body will be relatively far away; conversely, when the pipeline contracts, the internal force manifests as an extrusion force of the pump body on the motor, and the motor and the pump body will be relatively close. The relative displacement between the motor and the pump body will affect the fitting clearance of the internal parts of the motor and the pump body, and easily cause a decline in equipment performance and service life. Summary of the Invention

[0005] The purpose of the utility model is to solve the deficiencies in the prior art and provide a horizontal cryogenic liquid pump.

[0006] The purpose of the utility model is achieved through the following technical solutions: a horizontal low-temperature liquid pump, including a motor, a pump body, a base, a sliding seat, and a low-friction plate, the motor is fixedly mounted on the sliding seat, the sliding seat is arranged above the base, and a low-friction plate is provided between the lower end of the sliding seat and the upper end of the base; the sliding seat and the base are connected by a second connecting bolt; a first adjustment hole is provided at the upper end of the base, and a second adjustment hole is provided at the lower end of the sliding seat, and the second connecting bolt passes through the first adjustment hole and the second adjustment hole at the same time.

[0007] Preferably, the material of the low friction plate is tetrafluoroethylene.

[0008] Preferably, the first adjustment hole and the second adjustment hole are both waist-shaped holes, the length direction of the first adjustment hole is parallel to the axial or radial direction of the pump body, and the length direction of the second adjustment hole is perpendicular to the length direction of the first adjustment hole.

[0009] Preferably, the lower end surface of the sliding seat and the upper end surface of the base are both planes.

[0010] Preferably, the inlet and outlet of the pump body are both provided with expansion joints, and the expansion joints are connected to the pipeline.

[0011] Preferably, the bottom of the motor is connected to the sliding seat via a first connecting bolt.

[0012] Preferably, the low friction plate is a rectangular plate structure, and a through hole for passing the second connecting bolt is provided on the low friction plate.

[0013] The beneficial effect of the present invention is that a low-friction plate is provided between the sliding seat and the base in the present invention, so that when the pipeline is deformed and generates an axial force on the pump body, the sliding seat and the motor can slide and move synchronously with the pump body, thereby effectively reducing the internal force between the motor and the pump body, thereby reducing the relative movement between the motor and the pump body, thereby reducing the impact on the fitting clearance of the internal parts of the motor and the pump body, and improving the performance and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Fig. 1 It is a structural diagram of the present utility model.

[0015] Fig. 2 It is a structural diagram of the position of the first adjustment hole on the base.

[0016] In the figure: 1. Motor, 2. Pump body, 3. Expansion joint, 4. Pipe, 5. Base, 6. Sliding seat, 7. Low friction plate, 8. First connecting bolt, 9. Second connecting bolt, 10. First adjusting hole, 11. Gasket. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0018] like Figs. 1-2As shown, a horizontal cryogenic liquid pump includes a motor 1, a pump body 2, a base 5, a sliding seat 6, and a low-friction plate 7. The motor 1 is fixedly mounted on the sliding seat 6, which is positioned above the base 5. The low-friction plate 7 is positioned between the lower end of the sliding seat 6 and the upper end of the base 5. The sliding seat 6 and the base 5 are connected by a second connecting bolt 9. The upper end of the base 5 is provided with a first adjustment hole 10, and the lower end of the sliding seat 6 is provided with a second adjustment hole. The second connecting bolt 9 passes through both the first adjustment hole 10 and the second adjustment hole. The lower end of the base 5 is fixedly mounted on a concrete foundation, and the base 5 remains stationary. By positioning the low-friction plate 7 between the sliding seat 6 and the base 5, when the pipeline 4 deforms and generates an axial force on the pump body 2, the sliding seat 6 and the motor 1 can slide and move synchronously with the pump body 2. This effectively reduces the internal force between the motor 1 and the pump body 2, thereby reducing relative movement between the motor 1 and the pump body 2, thereby reducing the impact on the clearance between the internal components of the motor 1 and the pump body 2, and improving the performance and service life of the equipment.

[0019] The tightening force of the second adjustment bolt determines the contact pressure between the base 5 and the low-friction plate 7, and between the sliding seat 6 and the low-friction plate 7, thereby determining the sliding resistance of the sliding seat 6. The second adjustment bolt cooperates with the first adjustment hole 10 and the second adjustment hole to limit the sliding range of the sliding seat 6, so that the sliding seat 6 slides within the restricted range.

[0020] The low-friction plate 7 is made of a material with a low friction coefficient, ensuring that the sliding seat 6 can slide well on the base 5 .

[0021] In this embodiment, the low friction plate 7 is made of tetrafluoroethylene and has a rectangular plate structure. A through hole is provided on the low friction plate 7 for the second connecting bolt 9 to pass through.

[0022] Expansion joints 3 are provided on the inlet and outlet of the pump body 2 , and the expansion joints 3 are connected to the pipeline 4 .

[0023] Specifically, the first adjustment hole 10 and the second adjustment hole are both waist-shaped holes. The length direction of the first adjustment hole 10 is parallel to the axial or radial direction of the pump body 2, and the length direction of the second adjustment hole is perpendicular to the length direction of the first adjustment hole 10. The inlet on the pump body 2 is set at the center of the pump body 2 and arranged along the axial direction of the pump body 2. The pipe 4 connected to the inlet of the pump body 2 is also arranged along the axial direction of the pump body 2. Therefore, the direction of the force exerted on the pump body 2 by the pipe 4 when deformed is consistent with the axial direction of the pump body 2. The outlet on the pump body 2 is set tangentially along the circumference of the pump body 2. The arrangement direction of the pipe 4 connected to the outlet of the pump body 2 is parallel to the radial direction of the pump body 2. Therefore, the direction of the force exerted on the pump body 2 by the pipe 4 when deformed is parallel to the radial direction of the pump body 2. In view of the above-mentioned actual working conditions, the first adjustment hole 10 and the second adjustment hole in the utility model are respectively arranged along the radial and axial directions of the pump body 2. This allows the sliding seat 6 and the motor 1 to move along the radial and axial directions of the sliding seat 6 to comply with the direction of the force exerted by the pipe 4 on the pump body 2.

[0024] A gasket 11 is provided between the second connecting bolt 9 and the base 5 and between the second connecting bolt 9 and the base 5 . The gasket 11 is used to prevent the second connecting bolt 9 from getting stuck in the first adjustment hole 10 or the second adjustment hole.

[0025] The lower end surface of the sliding seat 6 and the upper end surface of the base 5 are both planes. This allows the base 5, the base 5 and the low friction plate 7 to form stable contact.

[0026] The bottom of the motor 1 is connected to the sliding seat 6 via a first connecting bolt 8. The first connecting bolt 8 needs to be tightened with a large torque to ensure a stable connection between the motor 1 and the sliding seat 6.

[0027] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A horizontal cryogenic liquid pump, characterized in that: It includes a motor, a pump body, a base, a sliding seat, and a low-friction plate. The motor is fixedly mounted on the sliding seat. The sliding seat is arranged above the base. A low-friction plate is provided between the lower end of the sliding seat and the upper end of the base. The sliding seat and the base are connected by a second connecting bolt. A first adjusting hole is provided at the upper end of the base, a second adjusting hole is provided at the lower end of the sliding seat, and the second connecting bolt passes through the first adjusting hole and the second adjusting hole at the same time.

2. A horizontal cryogenic liquid pump according to claim 1, characterized in that: The material of the low friction plate is tetrafluoroethylene.

3. A horizontal cryogenic liquid pump according to claim 1, characterized in that: The first adjustment hole and the second adjustment hole are both waist-shaped holes. The length direction of the first adjustment hole is parallel to the axial direction or radial direction of the pump body, and the length direction of the second adjustment hole is perpendicular to the length direction of the first adjustment hole.

4. A horizontal cryogenic liquid pump according to claim 1, characterized in that: The lower end surface of the sliding seat and the upper end surface of the base are both planes.

5. The horizontal cryogenic liquid pump according to claim 1, characterized in that: The inlet and outlet of the pump body are both provided with expansion joints, which are connected to the pipeline.

6. The horizontal cryogenic liquid pump according to claim 1, characterized in that: The bottom of the motor is connected to the sliding seat via a first connecting bolt.

7. The horizontal cryogenic liquid pump according to claim 1, characterized in that: The low friction plate is a rectangular plate structure, and a through hole for the second connecting bolt to pass through is provided on the low friction plate.

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