Vertical pitot tube pump

Abstract

A vertical pitot tube pump comprises a rotor component and a stator component, the stator component comprises a shell structure, a pitot tube assembly, a bearing body end cover, a mechanical seal box and a pump body inlet and outlet pipe opening seat, the rotor component is installed in the shell structure, and the pitot tube assembly is arranged in the middle of the bearing body end cover in a penetrating mode. The bearing body end cover is installed at the lower end of the shell structure in a sealed mode, the mechanical seal box body is installed on the lower side of the bearing body end cover, a fastening external thread pipe part is arranged at the lower end of the pitot tube assembly, the fastening external thread pipe part penetrates out of the mechanical seal box body, and a double-nut structure is installed on the fastening external thread pipe part. The mechanical seal box body and the pump body inlet and outlet pipe opening base are detachably installed in a sealed mode. The device is simple in structure, convenient to overhaul and maintain and high in reliability and efficiency, and inlet and outlet pipelines can be prevented from being disassembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump body structures, and in particular relates to a vertical pitot tube pump. Background Art

[0002] Pitot tube pumps, also known as rotary jet pumps and volute pumps, are widely used in the fields of petroleum, chemical and natural gas industries. They are suitable for small flow and high head transportation. The general flow rate is within tens of cubic meters per hour, and the small one is only a few cubic meters. The head is hundreds of meters, and some are as high as thousands of meters. The flow characteristic curve is smooth, and the liquid output is pulsation-free. Its structure is simple and the volume is small, so the maintenance is small, the maintenance cost is low, and the service life is long. Among them, although there are differences in the installation methods of the core components of the vertical pitot tube pump and the horizontal pitot tube pump, both need to take into account the design, assembly and maintenance during on-site operation.

[0003] In the prior art, a patent document with the announcement number CN 212717331 U discloses a wear-resistant ring for a pitot tube pump, including a pitot tube assembly, the outer circle of the pitot tube assembly is provided with a wear-resistant ring, the outer circle of the wear-resistant ring is provided with several threaded grooves, and the threaded groove is provided with several fastening screws for fixing the wear-resistant ring. The above scheme plays a role in preventing sparks by providing a wear-resistant ring, and avoids the pitot tube assembly from breaking at the friction point, thereby improving the service life; however, since the pump is installed vertically and the drive motor is installed on the upper part of the equipment, when installing the motor, the pitot tube pump needs to be fully installed to avoid repeated assembly or repeated assembly and disassembly; therefore, the vertical pump is more difficult to overhaul than the horizontal pump. If each overhaul and maintenance can be less disassembled, the on-site maintainability, reliability and efficiency can be further improved. In particular, it is also required to comply with the provisions of the API610 standard that the import and export pipelines should be avoided when disassembling the pump. Summary of the invention

[0004] 1. Technical Problems Solved

[0005] In view of the deficiencies in the prior art, the utility model provides a vertical pitot tube pump which has a simple structure, is easy to repair and maintain, has high reliability and high efficiency, and can avoid disassembling inlet and outlet pipelines.

[0006] 2. Specific technical solutions

[0007] A vertical pitot tube pump comprises a rotor component and a stator component, wherein the stator component comprises a housing structure, a pitot tube assembly, a bearing body end cover, a machine seal box and a pump body inlet and outlet pipe seat, wherein the rotor component is installed in the housing structure, the pitot tube assembly is arranged through the middle of the bearing body end cover, the bearing body end cover is sealed and installed at the lower end of the housing structure, the machine seal box is installed on the lower side of the bearing body end cover, a fastening external threaded pipe portion is provided at the lower end of the pitot tube assembly, and the fastening external threaded pipe portion passes through the machine seal box, and a double nut structure is installed on the fastening external threaded pipe portion, and a detachable sealing installation is provided between the machine seal box and the pump body inlet and outlet pipe seat.

[0008] Preferably, the rotor component comprises a driving main shaft, a hub and an impeller assembly, wherein the hub is mounted on the driving main shaft, the impeller assembly is mounted on the inner wall of the hub, and the upper end of the Pitot tube assembly is also arranged on the inner side of the hub.

[0009] Preferably, a driving end bearing cover assembly and a driven end bearing cover assembly are also provided in the housing structure, and the driving end bearing cover assembly and the driven end bearing cover assembly are respectively installed at the two ends of the driving main shaft, and a bearing body is also provided between the driving end bearing cover assembly and the driven end bearing cover assembly.

[0010] Preferably, an annular groove is provided at the top of the pump body inlet and outlet pipe seat, an annular boss is provided at the bottom of the machine seal box body, the annular groove cooperates with the annular boss, and a sealing ring structure is provided between the annular groove and the annular boss.

[0011] Preferably: the machine seal box body and the pump body inlet and outlet pipe seat are installed together by a bolt structure, the machine seal box body has a connecting cavity structure connected with the inner side of the hub, and the pump body inlet and outlet pipe seat is provided with an inlet pipe port and an outlet pipe port, the inlet pipe port is connected with the connecting cavity structure, the output pipe port is connected with the bottom of the Pitot tube assembly, and the top of the pump body inlet and outlet pipe seat is provided with a accommodating groove for accommodating a double nut structure.

[0012] Preferably, the outer wall of the Pitot tube assembly has an annular clamping structure, a clamping groove is provided in the mechanical seal body, and the annular clamping structure is installed in the clamping groove.

[0013] The beneficial effects of the utility model are as follows: the driving end bearing gland assembly, the housing structure, the bearing body, the driving main shaft, the driven end bearing gland assembly, the rotating hub, the pitot tube assembly, the impeller assembly, the bearing body end cover, the machine seal box body, the double nut structure, and the pump body inlet and outlet pipe seat are installed in the assembly order in sequence, and the components are connected with bolts and other fasteners. The pitot tube assembly is fastened with a double nut structure, one round nut is locked, and the other round nut is stopped to prevent the parts from loosening and being fixed more stably. Since the pitot tube pump maintenance parts are basically bearings and mechanical seals, when the pump is repaired, it is only necessary to disassemble the machine seal box body and replace the mechanical seal. Therefore, it can be ensured that the pump body inlet and outlet pipe seat in the vertical pitot tube pump is in a state where the pipeline is connected, and the entire pump group can be pulled out for maintenance and repair of parts, which is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model as a whole.

[0015] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0016] In the figure: 1. Drive end bearing gland assembly; 2. Shell structure; 3. Bearing body; 4. Drive spindle; 5. Drive end bearing gland assembly; 6. Hub; 7. Pitot tube assembly; 8. Impeller assembly; 9. Bearing body end cover; 10. Machine seal box body; 11. Double nut structure; 12. Pump body inlet and outlet pipe seat. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0020] like Figure 1 and Figure 2 As shown: a vertical pitot tube pump is provided with a rotor component and a stator component, the stator component includes a shell structure 2, a pitot tube assembly 7, a bearing body end cover 9, a machine seal box 10 and a pump body inlet and outlet pipe seat 12, the rotor component is installed in the shell structure 2, the pitot tube assembly 7 is arranged through the middle of the bearing body end cover 9, the bearing body end cover 9 is sealed and installed at the lower end of the shell structure 2, the machine seal box 10 is installed on the lower side of the bearing body end cover 9, the lower end of the pitot tube assembly 7 is provided with a fastening external threaded pipe portion, and the fastening external threaded pipe portion passes through the machine seal box 10, and a double nut structure 11 is installed on the fastening external threaded pipe portion, the double nut structure 11 is composed of two round nuts, one of which is locked, and the other round nut is used to stop, so that the fixation is more stable, and the machine seal box 10 and the pump body inlet and outlet pipe seat 12 can be detachably sealed.

[0021] Among them, the rotor components include a driving main shaft 4, a hub 6 and an impeller assembly 8. The driving main shaft 4 is used to connect the driving motor, the hub 6 is installed on the driving main shaft 4, the impeller assembly 8 is installed on the inner wall of the hub 6, and the upper end of the Pitot tube assembly 7 is also arranged on the inner side of the hub 6.

[0022] A driving end bearing cover assembly 1 and a driven end bearing cover assembly 5 are also provided in the housing structure 2. The driving end bearing cover assembly 1 and the driven end bearing cover assembly 5 are respectively installed at the two ends of the driving main shaft 4, and a bearing body 3 is also provided between the driving end bearing cover assembly 1 and the driven end bearing cover assembly 5. The driving end bearing cover assembly 1 and the driven end bearing cover assembly 5 are used for positioning the rotor components and sealing and lubricating.

[0023] An annular groove is provided at the top of the pump body inlet and outlet pipe seat 12, and an annular boss is provided at the bottom of the machine seal box body 10. The annular groove cooperates with the annular boss to facilitate installation and positioning and efficiently set the sealing structure. A sealing ring structure is provided between the annular groove and the annular boss.

[0024] The machine seal box 10 and the pump body inlet and outlet pipe seat 12 are installed together by a bolt structure. The machine seal box 10 has a connecting cavity structure connected with the inner side of the hub 6, and the pump body inlet and outlet pipe seat 12 is provided with an inlet pipe and an outlet pipe. The inlet pipe is connected with the connecting cavity structure, and the output pipe is connected with the bottom of the Pitot tube assembly 7. The top of the pump body inlet and outlet pipe seat 12 is provided with a accommodating groove for accommodating the double nut structure 11.

[0025] The outer wall of the Pitot tube assembly 7 has an annular clamping structure, and a clamping groove is provided in the machine seal box body 10. The annular clamping structure is installed in the clamping groove, and the annular clamping structure is arranged close to the fastening external threaded pipe part, so that the Pitot tube assembly 7 is fixed more stably by the double nut structure 11.

[0026] The driving end bearing gland assembly 1, the housing structure 2, the bearing body 3, the driving main shaft 4, the driven end bearing gland assembly 5, the rotating hub 6, the pitot tube assembly 7, the impeller assembly 8, the bearing body end cover 9, the machine seal box body 10, the double nut structure 11, and the pump body inlet and outlet pipe seat 12 are assembled in order to facilitate assembly and avoid repeated assembly or repeated assembly and disassembly. The components are connected with fasteners such as bolts. Among them, the pitot tube assembly 7 is fastened with a double nut structure 11, one round nut is locked, and the other round nut is stopped to prevent the parts from loosening and fixing more stably. Since the maintenance parts of the pitot tube pump are basically bearings and mechanical seals, when the pump is overhauled, it is only necessary to disassemble the machine seal box body 10 and replace the mechanical seal. Therefore, it can be ensured that the pump body inlet and outlet pipe seat 12 in the vertical pitot tube pump is connected to the pipeline. The whole pump group can be pulled out for maintenance and repair of parts, which is more convenient and quick, and meets the API610 standard.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims

1. A vertical pitot tube pump, characterized in that: The invention comprises a rotor component and a stator component, wherein the stator component comprises a housing structure (2), a pitot tube assembly (7), a bearing body end cover (9), a machine seal box (10) and a pump body inlet and outlet pipe seat (12); the rotor component is installed in the housing structure (2); the pitot tube assembly (7) is arranged through the middle of the bearing body end cover (9); the bearing body end cover (9) is sealed and installed at the lower end of the housing structure (2); the machine seal box (10) is installed on the lower side of the bearing body end cover (9); a fastening external threaded pipe portion is provided at the lower end of the pitot tube assembly (7); the fastening external threaded pipe portion passes through the machine seal box (10); a double nut structure (11) is installed on the fastening external threaded pipe portion; the machine seal box (10) and the pump body inlet and outlet pipe seat (12) are detachably sealed and installed.

2. The vertical pitot tube pump according to claim 1, characterized in that: The rotor component comprises a driving main shaft (4), a rotating hub (6) and an impeller assembly (8); the rotating hub (6) is mounted on the driving main shaft (4), the impeller assembly (8) is mounted on the inner wall of the rotating hub (6), and the upper end of the Pitot tube assembly (7) is also arranged on the inner side of the rotating hub (6).

3. The vertical pitot tube pump according to claim 2, characterized in that: A driving end bearing cover assembly (1) and a driven end bearing cover assembly (5) are also provided in the housing structure (2). The driving end bearing cover assembly (1) and the driven end bearing cover assembly (5) are respectively installed at the two ends of the driving main shaft (4), and a bearing body (3) is also provided between the driving end bearing cover assembly (1) and the driven end bearing cover assembly (5).

4. The vertical pitot tube pump according to any one of claims 1 to 3, characterized in that: An annular groove is provided at the top of the pump body inlet and outlet pipe seat (12), and an annular boss is provided at the bottom of the machine seal box body (10). The annular groove cooperates with the annular boss, and a sealing ring structure is provided between the annular groove and the annular boss.

5. The vertical pitot tube pump according to claim 4, characterized in that: The machine seal box (10) and the pump body inlet and outlet pipe seat (12) are mounted together via a bolt structure. The machine seal box (10) has a connecting cavity structure connected to the inner side of the hub (6), and the pump body inlet and outlet pipe seat (12) is provided with an inlet pipe and an outlet pipe, wherein the inlet pipe is connected to the connecting cavity structure, and the outlet pipe is connected to the bottom of the pitot tube assembly (7). A receiving groove is provided at the top of the pump body inlet and outlet pipe seat (12) for accommodating the double nut structure (11).

6. The vertical pitot tube pump according to claim 1 or 5, characterized in that: The outer wall of the Pitot tube assembly (7) has an annular clamping platform structure, and a clamping groove is provided in the machine seal box body (10), and the annular clamping platform structure is installed in the clamping groove.

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