High-temperature-resistant and high-pressure-resistant fluid pump and using method thereof

Abstract

The invention relates to a fluid pump, in particular to a high-temperature-resistant and high-pressure-resistant fluid pump and a using method thereof.The high-temperature-resistant and high-pressure-resistant fluid pump comprises a driving motor (1), a high-temperature-resistant pump body (7) and a high-temperature-resistant and high-pressure-resistant isolation cabin (11); the high-temperature-resistant pump body (7) is arranged inside the high-temperature-resistant and high-pressure-resistant isolation cabin (11), the driving motor (1) is arranged outside the high-temperature-resistant and high-pressure-resistant isolation cabin (11), and the high-temperature-resistant pump body (7) is connected with the driving motor (1) through a non-contact coupler; and the fluid pump is used for pumping high-temperature and high-pressure fluid. Compared with the prior art, the high-temperature-resistant and high-pressure-resistant fluid pump has the advantages that the defect that in the prior art, a high-temperature-resistant motor and a high-pressure-resistant pump body need to be involved in a high-temperature-resistant and high-pressure-resistant fluid pump is overcome, the mode of driving high-temperature and high-pressure fluid through a common motor is achieved, the use cost and the manufacturing cost of the fluid pump are greatly reduced, and the high reliability is achieved.

Description

Technical Field

[0001] The invention relates to a fluid pump, in particular to a high temperature and high pressure resistant fluid pump and a use method thereof. Background Art

[0002] Fluid pumps (gas / liquid) are generally integrated with motors and pump bodies, where the motor provides power and is connected to the pump body through a coupling to drive the fluid medium. The motor generally uses enameled wire coil windings to drive the rotating shaft, so it can withstand high pressure but not high temperature (the coil will burn out and fail above 100°C). The integrated pump body is generally fixed to the rotating shaft by the driving impeller, and the rotating shaft needs to be extended to connect to the motor, so it can withstand high temperature but not high pressure (it is difficult to completely dynamically seal the rotating shaft).

[0003] When the fluid pump needs to achieve high temperature resistance, the installation distance between the motor and the pump body needs to be increased so that the heat on the pump body that contacts the high temperature medium is not easily transferred to the motor end. When the fluid pump needs to achieve high pressure resistance, a complex rotating shaft sealing structure needs to be designed for the shaft end of the pump body.

[0004] For example, CN105697418A discloses a high-pressure resistant circulating pump for reverse osmosis, including a base and a circulating pump mounted on the base, the circulating pump including a pump body and a motor for driving the impeller in the pump body to rotate, and also including a pressure-bearing shell, the interior of the pressure-bearing shell is provided with a receiving chamber for accommodating the pump body, the pump body is placed in the receiving chamber, a fluid inlet and a fluid outlet are provided on the pressure-bearing shell, the fluid outlet is sealed and connected to the outlet end of the pump body, and the pump shaft of the pump body passes through the other side of the pressure-bearing shell and is connected to the motor through a coupling. In this scheme, a pressure-bearing shell is provided to isolate the pump body and the motor, but it is impossible to achieve complete isolation of the internal and external spaces, resulting in the need to set a dynamic sealing structure at the shaft passage to achieve relatively good sealing, but it is still difficult to meet the requirements of high temperature and high pressure environments at the same time.

[0005] If the functions of high temperature and high pressure resistance are required, it is necessary to design a high temperature resistant motor and a high pressure resistant pump body at the same time. This leads to the overall structure being expensive and the performance failing to meet the requirements, making it impossible to carry out industrial production. This is a common bottleneck problem that restricts the advancement of manufacturing process technology in related industries. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the above-mentioned problems and to provide a high-temperature and high-pressure resistant fluid pump and a method of using the same, so as to address the defect in the prior art that fluid pumps resistant to high-temperature and high-pressure environments require respectively involving high-temperature resistant motors and high-pressure resistant pump bodies. The present solution realizes the method of driving high-temperature and high-pressure fluids by ordinary motors, greatly reducing the use cost and manufacturing cost of the fluid pump and having high reliability.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] The first aspect of the present invention discloses a high temperature and high pressure resistant fluid pump, comprising a driving motor, a high temperature resistant pump body and a high temperature and high pressure resistant isolation cabin;

[0009] The high temperature resistant pump body is arranged inside the high temperature resistant and high pressure isolation cabin, the driving motor is arranged outside the high temperature resistant and high pressure isolation cabin, and the high temperature resistant pump body and the driving motor are connected via a non-contact coupling;

[0010] The fluid pump is used for pumping high-temperature and high-pressure fluid.

[0011] Preferably, the non-contact coupling comprises a first half coupling arranged outside the high temperature and high pressure isolation cabin and a second half coupling arranged inside the high temperature and high pressure isolation cabin.

[0012] Preferably, the driving motor is connected to the first half coupling via a motor main shaft; and the high temperature resistant pump body is connected to the second half coupling via a pump main shaft.

[0013] Preferably, the pump main shaft is assembled inside the high temperature and high pressure isolation cabin through a high temperature resistant bearing.

[0014] Preferably, the high temperature resistant bearing comprises a first high temperature resistant bearing and a second high temperature resistant bearing; and the high temperature resistant pump body is arranged between the first high temperature resistant bearing and the second high temperature resistant bearing.

[0015] Preferably, the axes of the motor main shaft coincide with those of the pump main shaft.

[0016] Preferably, the high temperature resistant pump body is connected to an upstream input device and a downstream receiving device through a fluid inlet pipe and a fluid outlet pipe respectively.

[0017] Preferably, the high temperature and high pressure resistant isolation cabin is also provided with a high temperature and high pressure resistant joint, and the fluid inlet pipe and the fluid outlet pipe are connected to the external equipment of the high temperature and high pressure resistant isolation cabin through the high temperature and high pressure resistant joint.

[0018] Preferably, the temperature of the high-temperature and high-pressure fluid is not less than 100° C. and the pressure is not less than 0.1 MPa.

[0019] Preferably, the high temperature and high pressure isolation cabin is a cylindrical structure, and its front and rear end surfaces are hemispherical structures, wherein part of the wall surface provided with the non-contact coupling is set as a plane. Since the interior of the high temperature and high pressure isolation cabin has a high pressure, directly using a cubic structure will cause surface compression deformation, so a combination of a cylindrical structure + a hemispherical structure is used to further improve the pressure bearing effect. At the same time, considering the setting of the non-contact coupling, a part of the plane is still retained at the corresponding position to provide effective and accurate transmission.

[0020] Preferably, a temperature sensor and a pressure sensor are respectively provided inside the high temperature and high pressure resistant isolation cabin for measuring the environmental conditions inside the high temperature and high pressure resistant isolation cabin.

[0021] The second aspect of the present invention discloses a method for using a high-temperature and high-pressure resistant fluid pump as described above, wherein a driving motor inside the high-temperature and high-pressure resistant isolation cabin drives a high-temperature resistant pump body inside the high-temperature and high-pressure resistant isolation cabin through the magnetic force of a non-contact coupling, and the high-temperature resistant pump body pumps high-temperature and high-pressure fluid.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention is composed of a pump system inside a high temperature and high pressure isolation cabin and a motor drive part outside under normal pressure conditions. The two are connected and driven by a non-contact magnetic connector (non-contact coupling), so that the pump body and the environment where the motor is located are separated and isolated. Thereby, it is possible to use an ordinary motor to drive the high temperature and high pressure fluid, and truly realize the low-cost transportation of high temperature and high pressure fluid. At the same time, since the transmission is achieved through a non-contact coupling after the motor and the pump are separated, the high temperature and high pressure isolation cabin only needs to be provided with a fluid inlet pipe and a fluid outlet pipe for the fluid to pass through. The two places can achieve good sealing through static sealing. Compared with the traditional dynamic seal, it can not only reduce the sealing difficulty and processing cost, but also greatly improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a fluid pump according to an embodiment of the present invention;

[0025] In the figure: 1-driving motor; 2-motor main shaft; 3-first half coupling; 4-second half coupling; 5-pump main shaft; 6-first high temperature resistant bearing; 7-high temperature resistant pump body; 8-second high temperature resistant bearing; 9-fluid inlet pipe; 10-fluid outlet pipe; 11-high temperature and high pressure isolation cabin. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In existing fluid pumps, the motor and the pump body are integrated structures. Therefore, it is necessary to consider the pressure and temperature resistance limitations of the motor (the coil will burn out at high temperatures) and the transmission structure (the shaft and bearing will expand and contract at high temperatures and cannot be stably matched, which can easily cause shaft jamming). As a result, existing fluid pumps are usually unable to achieve high temperature resistance and high pressure resistance at the same time. Even if one of them is achieved, it costs extremely high cost to seal.

[0028] Example

[0029] A high temperature and high pressure resistant fluid pump, such as Figure 1 As shown, it includes a driving motor 1, a high temperature resistant pump body 7 and a high temperature and high pressure resistant isolation cabin 11;

[0030] The high temperature resistant pump body 7 is arranged inside the high temperature resistant and high pressure isolation cabin 11, and the driving motor 1 is arranged outside the high temperature resistant and high pressure isolation cabin 11, and the high temperature resistant pump body 7 and the driving motor 1 are connected through a non-contact coupling;

[0031] The fluid pump is used for pumping high-temperature and high-pressure fluid.

[0032] More specifically, in this embodiment:

[0033] This fluid pump is used to pump high-temperature and high-pressure fluid (fluid with a temperature not lower than 100°C and a pressure not lower than 0.1MPa). It is mainly composed of a high-temperature resistant pump body 7 and a drive motor 1. The two are separated from each other by a high-temperature resistant and high-pressure isolation cabin 11 completely covered on the outside of the high-temperature resistant pump body 7, and the two are driven by a non-contact coupling. In addition, in order to better observe the environmental conditions in the high-temperature resistant and high-pressure isolation cabin 11, pressure sensors and temperature sensors are also provided inside the high-temperature resistant and high-pressure isolation cabin 11 to obtain the internal environmental pressure and temperature, so as to avoid overpressure and overtemperature during use.

[0034] The non-contact coupling is a magnetic coupling, which is composed of two half couplings. The first half coupling 3 is arranged outside the high temperature and high pressure isolation cabin 11, and is connected to the motor main shaft 2 of the drive motor 1 (such as a key connection); the second half coupling 4 is arranged inside the high temperature and high pressure isolation cabin 11, and is connected to the pump main shaft 5 of the high temperature resistant pump body 7 (such as a key connection). There is a distance between the first half coupling 3 and the second half coupling 4 so that the wall panel of the high temperature and high pressure isolation cabin 11 can pass through the two.

[0035] High temperature resistant bearings for supporting the pump main shaft 5 are respectively arranged inside the high temperature and high pressure isolation cabin 11 and on both sides of the high temperature resistant pump body 7, wherein the first high temperature resistant bearing 6 is arranged between the high temperature resistant pump body 7 and the second half coupling 4, and the second high temperature resistant bearing 8 can be symmetrically arranged with the first high temperature resistant bearing 6 with the high temperature resistant pump body 7 (the pump main shaft 5 is arranged to penetrate the high temperature resistant pump body 7).

[0036] To ensure the stable operation of the fluid pump, the central axes of the motor main shaft 2, the first half coupling 3, the second half coupling 4, the pump main shaft 5, the first high temperature resistant bearing 6, the high temperature resistant pump body 7 and the second high temperature resistant bearing 8 are located on the same straight line to ensure concentric and synchronous operation.

[0037] A high temperature and high pressure joint is also provided on the wall plate of the high temperature and high pressure isolation cabin 11, and the fluid inlet pipe 9 and the fluid outlet pipe 10 connected to the high temperature and high pressure pump body 7 are respectively connected to the external upstream input device and the downstream receiving device through the high temperature and high pressure joint. In particular, the fluid inlet pipe 9 and the fluid outlet pipe 10 can extend in the direction of the central axis of the high temperature and high pressure pump body 7, reducing the bends in the pipeline to minimize the pressure loss and avoid the possibility of clogging of the internal pipeline of the high temperature and high pressure isolation cabin 11. The high temperature and high pressure joint and the high temperature and high pressure isolation cabin 11 are assembled in the form of welding or screw connection. In addition, the high temperature and high pressure isolation cabin 11 adopts conventional high temperature and high pressure resistant materials, such as steel, and is also coated with a layer of insulation layer on the outside to reduce heat loss. The wall thickness of the high temperature and high pressure isolation cabin 11 is designed according to the recommended thickness of the non-contact coupling, thereby ensuring that effective transmission can be achieved between the high temperature and high pressure pump body 7 and the drive motor 1.

[0038] In this embodiment, the high temperature and high pressure isolation cabin 11 is in a cylindrical structure in conjunction with the high temperature and high pressure pump body 7. Furthermore, the end faces at both ends are designed as hemispherical structures, thereby reducing surface deformation caused by the internal high pressure. In addition, in order to ensure the effective and accurate transmission of the non-contact coupling, a local plane design is adopted in particular at the position where the non-contact coupling is assembled.

[0039] When the fluid pump is in use, the motor main shaft 2 of the driving motor 1 drives the first half coupling 3 to rotate; under the action of magnetic force, the first half coupling 3 further drives the second half coupling 4 to rotate; then, the second half coupling 4 drives the pump main shaft 5 to rotate. The rotation of the pump main shaft 5 drives the high temperature resistant pump body 7 to operate, and the high temperature and high pressure fluid from the upstream input device in the fluid inlet pipe 9 is pumped to the downstream receiving device through the fluid outlet pipe 10. Based on this, the fluid pump can withstand the conditions of high temperature and high pressure in the entire pipeline system and can normally realize the function of driving the fluid to move.

[0040] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A high temperature and high pressure resistant fluid pump, characterized in that: It comprises a driving motor (1), a high temperature resistant pump body (7) and a high temperature resistant and high pressure isolation cabin (11); The high temperature resistant pump body (7) is arranged inside the high temperature resistant and high pressure isolation cabin (11), the driving motor (1) is arranged outside the high temperature resistant and high pressure isolation cabin (11), and the high temperature resistant pump body (7) and the driving motor (1) are connected via a non-contact coupling; The fluid pump is used for pumping high-temperature and high-pressure fluid.

2. A high temperature and high pressure resistant fluid pump according to claim 1, characterized in that: The non-contact coupling comprises a first half coupling (3) arranged outside the high temperature and high pressure isolation cabin (11) and a second half coupling (4) arranged inside the high temperature and high pressure isolation cabin (11).

3. A high temperature and high pressure resistant fluid pump according to claim 2, characterized in that: The driving motor (1) is connected to the first half coupling (3) via the motor main shaft (2); the high temperature resistant pump body (7) is connected to the second half coupling (4) via the pump main shaft (5).

4. A high temperature and high pressure resistant fluid pump according to claim 3, characterized in that: The pump main shaft (5) is assembled inside the high temperature and high pressure isolation cabin (11) via a high temperature resistant bearing.

5. A high temperature and high pressure resistant fluid pump according to claim 4, characterized in that: The high temperature resistant bearing comprises a first high temperature resistant bearing (6) and a second high temperature resistant bearing (8); the high temperature resistant pump body (7) is arranged between the first high temperature resistant bearing (6) and the second high temperature resistant bearing (8).

6. A high temperature and high pressure resistant fluid pump according to claim 3, characterized in that: The axes of the motor main shaft (2) and the pump main shaft (5) coincide with each other.

7. A high temperature and high pressure resistant fluid pump according to claim 1, characterized in that: The high temperature resistant pump body (7) is connected to an upstream input device and a downstream receiving device respectively through a fluid inflow pipe (9) and a fluid outflow pipe (10).

8. A high temperature and high pressure resistant fluid pump according to claim 7, characterized in that: The high temperature and high pressure resistant isolation cabin (11) is also provided with a high temperature and high pressure resistant joint.

9. The high temperature and high pressure resistant fluid pump according to claim 1, characterized in that: The temperature of the high-temperature and high-pressure fluid is not less than 100°C and the pressure is not less than 0.1MPa.

10. A method for using the high temperature and high pressure resistant fluid pump according to any one of claims 1 to 9, characterized in that: The driving motor (1) inside the high temperature and high pressure isolation cabin (11) drives the high temperature and high pressure isolation cabin (11) through the magnetic force of the non-contact coupling, and the high temperature and high pressure isolation cabin (11) pumps the high temperature and high pressure fluid.

Images