Electric heat tracing heat preservation jacket submerged long shaft pump

Abstract

The utility model relates to the technical field of long shaft pumps, in particular to an electric heat tracing heat preservation jacket submerged long shaft pump which comprises a mounting plate, a pump body, a driving assembly, a connecting assembly, a heat preservation assembly, a water outlet assembly and a fixing assembly. A driving assembly is arranged above the mounting plate, a connecting assembly is arranged below the mounting plate, a heat preservation assembly is arranged in the connecting assembly, a pump body is arranged below the connecting assembly, a water outlet assembly is arranged on the side wall of the pump body, and a fixing assembly is arranged on the side wall of the water outlet assembly; according to the long-shaft pump, by arranging the connecting structure and the heat preservation structure, the submerged long-shaft pump can adapt to the working environment with the extreme low temperature, the application range of the submerged long-shaft pump is widened, and compared with a common submerged long-shaft pump with heat preservation through hot water or steam, the submerged long-shaft pump is simpler in structure, fewer in ancillary facilities, more accurate in temperature control, not prone to leakage and longer in service life; therefore, the efficient and practical effects can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of long shaft pumps, in particular to a submerged long shaft pump with an electric heating insulation jacket. Background Art

[0002] Generally, the submersible long-axis pump with single-stage and single-suction can reach a depth of 5-7 meters. It is installed vertically on the pump pit, with the motor on the upper part. When working, the pump body and impeller are partially immersed in the liquid in the pump pit. The temperature of the liquid medium suitable for conveying is less than 50℃, and it can reach 80℃ after special design. These are the common working conditions of normal temperature submersible pumps. However, in recent years, there have been many projects with extreme working conditions, such as some outdoor projects in northern China and some projects in Russia. These projects have one thing in common, that is, the extreme temperature reaches -30℃~-65℃. Although in these environments, the medium temperature of the submersible long-axis pump will be at room temperature when it is actually working, but when the pump is stored or shut down, the pump will be equal to the local temperature, that is, the pump may be exposed to an extreme low temperature environment. When the pump is exposed to a low temperature environment, the structure will crack, the seal will age and fail, which will greatly affect the service life, and even the pump will not work normally after thawing. In view of this working condition, in addition to considering the material of the submersible pump, the structure of the submersible long-axis pump needs to be modified to adapt to the low-temperature environment. Therefore, it is necessary to design a submersible long-axis pump with an electric heating insulation jacket. Utility Model Content

[0003] In order to overcome the problem that during the use of the long-axis pump, the medium temperature will be normal temperature when the submersible long-axis pump is actually working, but when the pump is stored or shut down, the pump and the local temperature will be the same, that is, the pump may be exposed to an extreme low temperature environment; when the pump is exposed to a low temperature environment, the structure will crack and the seals will age and fail, greatly affecting the service life, and even the pump may not work normally after thawing; for this working condition, in addition to considering the material of the submersible pump, the structure of the submersible long-axis pump also needs to be modified to adapt to the low temperature environment, which makes it inconvenient to achieve high efficiency and practicality.

[0004] The technical solution of the utility model is: an electric heating and insulation jacketed submersible long-axis pump, comprising a mounting plate, a pump body, a driving assembly, a connecting assembly, an insulation assembly, a water outlet assembly and a fixing assembly; a driving assembly is arranged above the mounting plate, a connecting assembly is arranged below the mounting plate, an insulation assembly is arranged inside the connecting assembly, a pump body is arranged below the connecting assembly, a water outlet assembly is arranged on the side wall of the pump body, and a fixing assembly is arranged on the side wall of the water outlet assembly.

[0005] Preferably, after adopting this structure, the submersible long-axis pump can adapt to the working environment of extreme low temperature, broadening the application range of the submersible long-axis pump. Compared with the general submersible long-axis pump that uses hot water or steam for heat preservation, it has a simpler structure, fewer auxiliary facilities, more accurate temperature control, less prone to leakage, and longer service life, and has great practical value and market prospects.

[0006] Preferably, the drive assembly includes a drive motor and a motor seat; the motor seat is arranged above the mounting plate, the drive motor is arranged above the motor seat, and the drive motor is fixedly connected to the motor seat; the drive shaft can be driven to rotate by starting the drive motor, and the drive motor can be securely installed through the motor seat.

[0007] Preferably, the connecting assembly includes a jacketed connecting pipe and upper and lower flanges; a jacketed connecting pipe is arranged below the mounting plate, upper and lower flanges are arranged at both ends of the jacketed connecting pipe, and the jacketed connecting pipe is fixedly connected to the upper and lower flanges; the connecting pipe of the pump is designed to be a double-layer jacketed connecting pipe, and there is stagnant air in the interlayer of the jacketed connecting pipe, because air is a poor conductor of heat, which is beneficial to heat preservation, the jacketed connecting pipe and the upper and lower flanges are welded and sealed, and there are electric heating tape passing pipes that are evenly distributed and penetrated between the upper and lower flanges (the number depends on the air temperature and working conditions).

[0008] Preferably, the connecting assembly also includes thermal insulation cotton, an intermediate connecting pipe and a pump bracket; an intermediate connecting pipe is arranged inside the jacketed connecting pipe, thermal insulation cotton is arranged inside the intermediate connecting pipe, and a pump bracket is arranged on the side wall of the jacketed connecting pipe; the intermediate connecting pipe and the pump bracket are single-layer pipe structures, and an electric heating tape passing pipe that passes through the upper and lower parts is welded between their two flanges. The external space of the intermediate connecting pipe and the pump bracket is used for the connection of bolts when the pump is assembled. After the bolts are tightened, these two places are wrapped with thermal insulation cotton for insulation.

[0009] As a preferred embodiment, the insulation assembly includes a bearing box, an electric heating junction box and a self-limiting electric heating tape; the jacketed connecting pipe is provided with a self-limiting electric heating tape inside, the jacketed connecting pipe is provided with a bearing box inside, the side wall of the motor seat is provided with an electric heating junction box, and the power supply end of the self-limiting electric heating tape is connected to the power supply of the electric heating junction box; when the pump is assembled and connected, it is necessary to ensure that the passage pipes of each electric heating tape are connected. Then, the length of the electric heating tape is confirmed according to the submerged depth of the pump. After the pump mounting plate and the lower part are assembled, the electric heating tape is inserted from the electric heating tape passage hole of the upper bearing box downward, and the end face of the electric heating tape extends to the lower part of the pump bracket. Finally, the power supply ends of all the electric heating tapes are concentrated in the junction box, and finally the motor seat and the motor are installed to complete the assembly of the entire pump.

[0010] Preferably, the water outlet assembly includes an outlet pipe, a connecting flange and a water outlet pipe; the outlet pipe is arranged on the side wall of the pump body, a connecting flange is arranged at one end of the outlet pipe, and the water outlet pipe is arranged on one side of the connecting flange; the outlet pipe and the water outlet pipe can be fastened and installed through the connecting flange.

[0011] Preferably, the fixing assembly includes fixing bolts and fixing nuts; fixing bolts are arranged on one side of the connecting flange, and multiple groups of fixing bolts are arranged; fixing nuts are arranged on the other side of the connecting flange, and the fixing bolts are threadedly connected to the fixing nuts; through the cooperation of multiple groups of fixing bolts and fixing nuts, the water outlet pipe and the outlet pipe can be fastened and installed through the connecting flange.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional long-axis pump, the medium temperature of the submersible long-axis pump will be normal temperature when it is actually working. However, when the pump is stored or shut down, the pump and the local temperature will be the same, that is, the pump may be exposed to an extreme low temperature environment; when the pump is exposed to a low temperature environment, the structure will crack, the seal will age and fail, which will greatly affect the service life, and the pump may not work normally even after thawing; for this working condition, in addition to considering the material of the submersible pump, the structure of the submersible long-axis pump needs to be modified to adapt to the low temperature environment, which is inconvenient to achieve high efficiency and practicality. The long-axis pump can adapt to the extremely low temperature working environment by setting a connection structure and a heat preservation structure, broadening the application range of the submersible long-axis pump. It is simpler in structure than the general submersible long-axis pump that uses hot water or steam for heat preservation, has fewer auxiliary facilities, more accurate temperature control, is less likely to leak, and has a longer service life, so that high efficiency and practicality can be achieved;

[0014] 2. When the pump is in an extremely low temperature environment, during the storage stage or shutdown stage, because the whole machine is made of low temperature resistant material and is not easy to be cold and brittle (the low temperature motor is equipped with an electric heater), and the electric heating belt of the pump is turned on, after the electric heating belt is turned on, the internal space of the jacketed connecting pipe will be in a state of heating and constant temperature, so that the whole machine is at normal temperature from top to bottom, thereby ensuring that the submersible long-axis pump can start and work normally, and the sealing parts are not easy to age, and the service life is extended. The electric heating insulation jacketed submersible long-axis pump does not need to turn on the electric heating belt at room temperature, and it can be turned on when the temperature is below 0℃. The self-limiting temperature of the electric heating belt is determined according to the on-site environment, so as to achieve the effect of automatic temperature control;

[0015] 3. When assembling and connecting the pump, it is necessary to ensure that the through-pipes of each electric heating cable are connected, and then confirm the length of the electric heating cable according to the underwater depth of the pump. After the pump mounting plate and the lower part are assembled, insert the electric heating cable from the electric heating cable through-hole of the upper bearing box downward, and extend the end face of the electric heating cable to the lower part of the pump bracket. Finally, the power ends of all the electric heating cables are concentrated in the junction box, and finally the motor base and motor are installed to complete the assembly of the entire pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a schematic diagram of the first three-dimensional structure of an electric heating insulation jacketed submerged long-axis pump of the utility model;

[0017] Figure 2 The third embodiment of the present invention is a schematic diagram of the second bottom three-dimensional structure of an electric heating insulation jacketed submerged long shaft pump;

[0018] Figure 3 The third partial three-dimensional structure schematic diagram of an electric heating insulation jacketed submerged long-axis pump of the utility model is shown;

[0019] Figure 4 The first schematic diagram of the fully sectional structure of an electric heating insulation jacketed submerged long shaft pump of the utility model is shown;

[0020] Explanation of the reference numerals: 1. driving assembly; 2. connecting assembly; 3. insulation assembly; 4. water outlet assembly; 5. fixing assembly; 6. mounting plate; 7. pump body; 101. driving motor; 102. motor seat; 201. jacketed connecting pipe; 202. upper and lower flanges; 203. insulation cotton; 204. middle connecting pipe; 205. pump bracket; 301. bearing box; 302. electric heating junction box; 303. self-limiting temperature electric heating belt; 401. outlet pipeline; 402. connecting flange; 403. water outlet pipeline; 501. fixing bolt; 502. fixing nut. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1 The utility model provides an embodiment: an electric heating insulation jacketed submersible long-axis pump, comprising a mounting plate 6, a pump body 7, a driving component 1, a connecting component 2, a heat-insulating component 3, a water outlet component 4 and a fixing component 5; the driving component 1 is arranged above the mounting plate 6, the connecting component 2 is arranged below the mounting plate 6, the heat-insulating component 3 is arranged inside the connecting component 2, the pump body 7 is arranged below the connecting component 2, the water outlet component 4 is arranged on the side wall of the pump body 7, and the fixing component 5 is arranged on the side wall of the water outlet component 4.

[0023] See also Figure 2, the driving assembly 1 includes a driving motor 101 and a motor seat 102; a motor seat 102 is arranged above the mounting plate 6, and a driving motor 101 is arranged above the motor seat 102, and the driving motor 101 is fixedly connected to the motor seat 102; by starting the driving motor 101, the driving shaft can be driven to rotate, and the driving motor 101 can be fastened and installed through the motor seat 102; the connecting assembly 2 includes a jacketed connecting pipe 201 and upper and lower flanges 202; a jacketed connecting pipe 201 is arranged below the mounting plate 6, and upper and lower flanges 202 are arranged at both ends of the jacketed connecting pipe 201, and the jacketed connecting pipe 201 is fixedly connected to the upper and lower flanges 202; the connecting pipe of the pump is designed as a double-layer jacketed connecting pipe 201, and there is stagnant air in the interlayer of the jacketed connecting pipe 201, because air is a poor conductor of heat. The jacketed connecting pipe 201 and the upper and lower flanges 202 are welded and sealed, and there are electric heating tape running pipes that are evenly distributed and connected between the upper and lower flanges 202 (the number depends on the temperature and working conditions); the connecting component 2 also includes insulation cotton 203, an intermediate connecting pipe 204 and a pump bracket 205; the jacketed connecting pipe 201 is provided with an intermediate connecting pipe 204, and the intermediate connecting pipe 204 is provided with insulation cotton 203, and the side wall of the jacketed connecting pipe 201 is provided with a pump bracket 205; the intermediate connecting pipe 204 and the pump bracket 205 are single-layer pipe structures, and an electric heating tape running pipe that is connected from top to bottom is also welded between their two flanges. The external spaces of the intermediate connecting pipe 204 and the pump bracket 205 are used for the connection of bolts when the pump is assembled. After the bolts are tightened, these two places are wrapped with insulation cotton 203 for insulation.

[0024] See also Figure 3-4In this embodiment, the insulation component 3 includes a bearing box 301, an electric heating junction box 302 and a self-limiting temperature electric heating belt 303; the self-limiting temperature electric heating belt 303 is arranged inside the jacketed connecting pipe 201, the bearing box 301 is arranged inside the jacketed connecting pipe 201, the electric heating junction box 302 is arranged on the side wall of the motor base 102, and the power end of the self-limiting temperature electric heating belt 303 is connected to the power supply of the electric heating junction box 302; when the pump is assembled and connected, it is necessary to ensure that the passage pipes of each electric heating belt are connected. Then confirm the length of the electric heating tape according to the underwater depth of the pump. After the pump mounting plate 6 and the lower part are assembled, insert the electric heating tape from the electric heating tape passage hole of the upper bearing box 301 downward, and extend the end face of the electric heating tape to the lower part of the pump bracket 205. All the power ends of the electric heating tape are finally concentrated in the junction box, and finally the motor seat 102 and the motor are installed to complete the assembly of the whole pump; the water outlet component 4 includes an outlet pipeline 401, a connecting flange 402 and a water outlet pipeline 403; the side wall of the pump body 7 is provided with an outlet pipeline 401, one end of the outlet pipeline 401 is provided with a connecting flange 402, and one side of the connecting flange 402 is provided with Water outlet pipe 403; the outlet pipe 401 and the water outlet pipe 403 can be fastened and installed through the connecting flange 402; the fixing component 5 includes a fixing bolt 501 and a fixing nut 502; a fixing bolt 501 is arranged on one side of the connecting flange 402, and a plurality of fixing bolts 501 are arranged, and a fixing nut 502 is arranged on the other side of the connecting flange 402, and the fixing bolt 501 is threadedly connected with the fixing nut 502; through the cooperation of a plurality of fixing bolts 501 and fixing nuts 502, the water outlet pipe 403 and the outlet pipe 401 can be fastened and installed through the connecting flange 402.

[0025] When working, the connecting pipe of the pump is designed as a double-layer jacketed connecting pipe 201. There is stagnant air in the interlayer of the jacketed connecting pipe 201, which is conducive to heat preservation because air is a poor conductor of heat.

[0026] The upper and lower flanges 202 of the jacketed connecting pipe 201 are welded and sealed, and there are electric heating tape passing pipes evenly distributed and penetrating between the upper and lower flanges 202 (the number depends on the temperature and working conditions);

[0027] The outer diameter of the self-limiting temperature heating cable 303 is generally about 12 mm, so the heating cable can smoothly pass through the double-layer jacketed connecting pipe 201, and each bearing box 301 is also designed with a through hole for the heating cable to pass through;

[0028] The middle connecting pipe 204 and the pump bracket 205 are single-layer pipe structures, and an electric heating cable running pipe that passes through the two flanges is welded between them. The external spaces of the middle connecting pipe 204 and the pump bracket 205 are used for bolt connection when assembling the pump. After the bolts are tightened, these two places are wrapped with insulation cotton 203 for insulation;

[0029] When the pump is assembled and connected, it is necessary to ensure that the passage pipes of each electric heating cable are connected. Then confirm the length of the electric heating cable according to the submerged depth of the pump. After the pump mounting plate 6 and the lower part are assembled, insert the electric heating cable from the electric heating cable passage hole of the upper bearing box 301 downwards, and extend the end face of the electric heating cable to the lower part of the pump bracket 205. Finally, the power supply ends of all the electric heating cables are concentrated in the junction box, and finally the motor base 102 and the motor are installed to complete the assembly of the entire pump;

[0030] The seals between the bearing boxes 301, the intermediate connecting pipe 204, the jacketed connecting pipe 201 and the pump bracket 205 are all sealed with flat gaskets at the outer edge of the flange. After the seals are completed at all locations, the electric heating belt does not contact the medium.

[0031] In this way, when the pump is in an extremely low temperature environment, during the storage stage or shutdown stage, because the whole machine is made of low temperature resistant material and is not easy to be cold and brittle, the low temperature motor is equipped with an electric heater, and the electric heating belt of the pump is turned on;

[0032] After the electric heating belt is turned on, the internal space of the jacketed connecting pipe 201 will be in a state of rising and constant temperature, so that the whole machine is at normal working temperature from top to bottom, thereby ensuring that the submerged long-axis pump can start and work normally, and the sealing parts are not easy to age, and the service life is extended;

[0033] The electric heating insulation jacketed submersible long-axis pump does not need to turn on the electric heating tape at room temperature. It can be turned on when the temperature is below zero°C. The self-limiting temperature of the electric heating tape is determined according to the on-site environment.

[0034] Through the above steps, after adopting this structure, the submersible long-axis pump can adapt to the working environment of extreme low temperature, and broaden the application range of the submersible long-axis pump. Compared with the general submersible long-axis pump that uses hot water or steam for heat preservation, it has a simpler structure, fewer auxiliary facilities, more accurate temperature control, less prone to leakage, and longer service life, and has great practical value and market prospects.

[0035] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An electric heating and insulation jacketed submersible long shaft pump, comprising a mounting plate (6); characterized in that: The utility model also comprises a pump body (7), a driving component (1), a connecting component (2), a heat preservation component (3), a water outlet component (4) and a fixing component (5); the driving component (1) is arranged above the mounting plate (6), the connecting component (2) is arranged below the mounting plate (6), the heat preservation component (3) is arranged inside the connecting component (2), the pump body (7) is arranged below the connecting component (2), the water outlet component (4) is arranged on the side wall of the pump body (7), and the fixing component (5) is arranged on the side wall of the water outlet component (4); the connecting component (2) comprises a jacketed connecting pipe (201) and upper and lower flanges (202); the jacketed connecting pipe (201) is arranged below the mounting plate (6), the upper and lower flanges (202) are arranged at both ends of the jacketed connecting pipe (201), and the jacketed connecting pipe (201) is fixedly connected to the upper and lower flanges (202). The connection component (2) further comprises a heat preservation cotton (203), an intermediate connection pipe (204) and a pump bracket (205); the jacketed connection pipe (201) is provided with an intermediate connection pipe (204), the intermediate connection pipe (204) is provided with a heat preservation cotton (203), and the side wall of the jacketed connection pipe (201) is provided with a pump bracket (205); the heat preservation component (3) comprises a bearing box (301), an electric heating junction box (302) and a self-limiting temperature electric heating belt (303); the jacketed connection pipe (201) is provided with a self-limiting temperature electric heating belt (303), the jacketed connection pipe (201) is provided with a bearing box (301), the side wall of the motor seat (102) is provided with an electric heating junction box (302), and the power supply end of the self-limiting temperature electric heating belt (303) is connected to the power supply of the electric heating junction box (302).

2. The electric heating and insulation jacketed submersible long-axis pump according to claim 1, characterized in that: The driving assembly (1) comprises a driving motor (101) and a motor seat (102); the motor seat (102) is arranged above the mounting plate (6), the driving motor (101) is arranged above the motor seat (102), and the driving motor (101) is fixedly connected to the motor seat (102).

3. The electric heating and insulation jacketed submersible long-axis pump according to claim 1, characterized in that: The water outlet assembly (4) comprises an outlet pipeline (401), a connecting flange (402) and a water outlet pipeline (403); the outlet pipeline (401) is arranged on the side wall of the pump body (7), one end of the outlet pipeline (401) is arranged with a connecting flange (402), and one side of the connecting flange (402) is arranged with the water outlet pipeline (403).

4. The electric heating and insulation jacketed submersible long-axis pump according to claim 3, characterized in that: The fixing assembly (5) comprises a fixing bolt (501) and a fixing nut (502); a fixing bolt (501) is arranged on one side of the connecting flange (402), and a plurality of fixing bolts (501) are arranged; a fixing nut (502) is arranged on the other side of the connecting flange (402), and the fixing bolt (501) and the fixing nut (502) are threadedly connected.

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