CN211474424U

CN211474424U - Double-screw pump for conveying high-freezing-point high-temperature fluid

Info

Publication number: CN211474424U
Application number: CN201921573431.1U
Authority: CN
Inventors: 占方余; 鲁健鹏; 刘泽洋; 郑臣; 吴丹
Original assignee: Bst Pump Tianjin Co ltd
Current assignee: Bst Pump Tianjin Co ltd
Priority date: 2019-09-21
Filing date: 2019-09-21
Publication date: 2020-09-11
Anticipated expiration: 2029-09-21

Abstract

The utility model relates to a high temperature pump technical field just discloses a high freezing point high temperature fluid carries two screw pumps of usefulness, which comprises a pump body, the inboard fixedly connected with bush of the pump body, transmission shaft and scroll casing are equipped with to the hole of bush, the right-hand member fixedly connected with bearing cooling inlet of the pump body, the left end fixedly connected with pump chamber heat preservation entry of the pump body. The synchronous gear outside the driving shaft is driven to rotate through the rotation of the driving shaft, the synchronous gears are installed on the driven shaft and the outer side of the driving shaft, and the two pairs of spiral sleeves installed on the driving shaft and the driven shaft are meshed with each other to rotate. The pump body is wrapped in the heat-preservation jacket, the cooling jackets are respectively arranged on the outer sides of the front bearing seat and the rear bearing seat, and the heat generated when the rolling bearing operates and the heat transmitted from the heat-preservation jacket on the pump body and the bearing seats can be timely taken away by cooling water, so that the rolling bearing can work within a proper temperature range.

Description

Double-screw pump for conveying high-freezing-point high-temperature fluid

Technical Field

The utility model relates to a high temperature pump technical field specifically is a high freezing point high temperature fluid carries twin-screw pump of usefulness.

Background

The key to successful delivery of the fluid with high temperature (the optimal delivery temperature is 130-140 ℃) like liquid sulfur and high liquid-solid conversion temperature (the fluid is converted from liquid to solid when the temperature is lower than 114.5 ℃) is to ensure that the temperature around a liquid receiving part of the pump is not lower than 130 ℃.

Traditionally, liquid sulfur transfer pumps have typically been long-axis submerged centrifugal pumps. The pump is a heat-preservation vertical submerged pump, and a liquid outlet pipe, a pump body and a pump cover of the pump are all provided with heat-preservation jackets to ensure that the conveyed liquid sulfur is not solidified. Because the pump is arranged in a closed underground liquid sulfur pool, the whole pump unit needs to be lifted out of the underground storage pool in the maintenance process of the long-shaft submerged centrifugal pump, and corresponding parts of the pump need to be detached before the pump is solidified by means of the residual heat of the liquid sulfur. In the process, multiple personnel such as fitters, hoisters, plumbers and electricians need to be coordinated, closely matched and quickly operated in a high-temperature environment, so that the repair time is long, the working strength is high, and the maintenance cost is high; in addition, because the liquid sulfur is exposed in the air, a large amount of sulfur vapor is volatilized, so that the environment is seriously polluted, and the risk of harming the health of maintenance personnel is high.

The existing twin-screw pump also comprises a high-temperature twin-screw pump for conveying high-temperature fluid (such as asphalt and residual oil). However, this type of twin-screw pump has no heating and heat-insulating structure in the pump intake region, the discharge pipe, particularly, the atmosphere side of the mechanical seal, and the like, and the pumping medium in these regions cannot be effectively insulated, and is not suitable for transporting a solidification temperature-sensitive fluid such as liquid sulfur.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

To prior art's not enough, the utility model provides a high freezing point high temperature fluid carries twin-screw pump of usefulness possesses the heat retaining advantage of fluid medium, has solved the lower problem that leads to solidifying of fluid temperature.

(II) technical scheme

In order to realize the purpose of heat preservation of the fluid medium, the utility model provides a following technical scheme: the utility model provides a double screw pump that high freezing point high temperature fluid transport used, includes the pump body, the inboard fixedly connected with bush of the pump body, left side spiral shell and right spiral shell are installed to the hole of bush, mechanical seal is installed to the outer end of left and right spiral shell, mechanical seal installs on driving shaft and driven shaft, driving shaft and driven shaft have front axle bearing and rear axle bearing through antifriction bearing swing joint, the both ends of the pump body are connected with front axle bearing, rear axle bearing and sealed letter body, the left end swing joint of rear axle bearing has synchronous gear, the left end fixedly connected with gear box of rear axle bearing, the pump export has been seted up at the top of the pump body, the right-hand member of the pump body has seted up the pump entry, the right-hand member fixedly connected with mechanical seal heat preservation entry of the pump body, the right-hand member fixedly connected with bearing cooling entry of the pump, the left end fixedly connected with pump chamber heat preservation entry of the pump body, the right-hand member fixedly connected with pump chamber heat preservation export of the pump body.

Preferably, the outside of the pump body is provided with a 360-degree all-directional heat-insulating jacket, so that the fluid in the pump body is prevented from being solidified due to temperature reduction.

Preferably, the outer side of the pump body is provided with a flange for mounting external parts, and the flange mounting hole is a threaded blind hole.

Preferably, the front bearing seat and the rear bearing seat are both provided with a heating jacket and a cooling jacket, so that the temperature of the bearing is kept balanced, and the bearing can normally run.

Preferably, the pump body is of a double-suction type or a single-suction type, and the installation mode is horizontal installation or vertical installation, so that the installation requirements of different working environments are met.

Preferably, the machine seal heat preservation inlet and the machine seal heat preservation outlet are communicated with a heating jacket, and the heating jacket can be arranged on the front bearing seat and the rear bearing seat and also can be arranged on the sealing box body, so that the heat preservation effect is ensured.

Preferably, the front bearing seat and the rear bearing seat are formed by welding, so that a heating jacket for heat preservation of the mechanical seal and a cooling jacket for heat dissipation of the bearing are conveniently arranged.

(III) advantageous effects

Compared with the prior art, the utility model provides a two-screw pump that high freezing point high temperature fluid carried usefulness possesses following beneficial effect:

1. this twin-screw pump that high freezing point high temperature fluid carried usefulness, through the rotation of driving shaft, will drive the rotation of the synchronizing gear in the driving shaft outside, and synchronizing gear is all installed with the outside of driving shaft to the driven shaft, and the intermeshing of two synchronizing gears for the rotation of driving shaft drive driven shaft when rotating, and because equal fixed mounting has levogyration swivel nut and dextrorotation swivel nut on driving shaft and the driven shaft, when making the driving shaft drive the driven shaft and rotate, two pairs of swivel nuts also intermeshing rotates.

2. According to the double-screw pump for conveying the high-freezing-point high-temperature fluid, the pump body is wrapped in the heat-insulation jacket, so that media in all liquid-receiving areas of the pump body are sufficiently heated and insulated, and the solidification of the media in the pump due to insufficient heat insulation is avoided. The omnibearing heat-insulating jacket structure ensures that residual liquid in the pump body can be emptied smoothly, and reduces the labor intensity and danger when quick-wear parts such as mechanical seal are replaced. The front bearing seat and the rear bearing seat are both provided with cooling jackets, and the heat generated when the rolling bearing operates and the heat transmitted from the heat-insulating jacket on the pump body and the bearing seat can be taken away in time by cooling water, so that the rolling bearing is ensured to work within a proper temperature range.

Drawings

FIG. 1 is a sectional view of the present invention;

fig. 2 is an end view of the structure of the present invention;

FIG. 3 is a right side view of the structure of the present invention;

fig. 4 is a schematic view of the rear bearing seat of the present invention.

In the figure: 1-pump body, 2-bush, 3-front bearing seat, 4-rear bearing seat, 5-driving shaft, 6-driven shaft, 7-left-handed screw sleeve, 8-right-handed screw sleeve, 9-gear box, 10-sealing box body, 11-synchronous gear, 12-rolling bearing, 13-mechanical seal, 14-pump cavity heat preservation outlet, 15-pump cavity heat preservation inlet, 16-mechanical seal heat preservation outlet, 17-pump outlet, 18-pump inlet, 19-mechanical seal heat preservation inlet and 20-bearing cooling inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, a high freezing point high temperature fluid delivery twin-screw pump, including a pump body 1, the outside of the pump body 1 is equipped with a 360 degree all-dimensional heat preservation jacket, thereby preventing the fluid temperature of the pump body 1 from reducing and solidifying, the outside of the pump body 1 is used for installing external parts by flanges, the flange installation holes are threaded blind holes, thereby making the main pump 1 more convenient to connect with external parts, the pump body 1 is of double-suction type or single-suction type, the installation mode is horizontal installation or vertical installation, thereby satisfying the installation requirements of different working environments, the inside of the pump body 1 is fixedly connected with a bushing 2, the inner wall of the bushing 2 is fixedly connected with a left-handed screw sleeve 7, the inner hole of the bushing 2 is provided with a left-handed screw sleeve 7 and a right-handed screw sleeve 8, the outer ends of the left-handed screw sleeve 7 and the right-handed screw sleeve 8 are provided with a, the driving shaft 5 and the driven shaft 6 are movably connected with a front bearing seat 3 and a rear bearing seat 4 through a rolling bearing 12, the front bearing seat 3 and the rear bearing seat 4 are both provided with cooling jackets so as to keep the running temperature of the bearing balanced and ensure the bearing to operate normally, the two ends of the pump body 1 are fixedly connected with the front bearing seat 3, the rear bearing seat 4 and a sealing box body 10, the left end of the rear bearing seat 4 is movably connected with a synchronous gear 11, the left end of the rear bearing seat 4 is fixedly connected with a gear box 9, the top of the pump body 1 is provided with a pump outlet 17, the right end of the pump body 1 is provided with a pump inlet 18, the right end of the pump body 1 is fixedly connected with a machine seal heat insulation inlet 19, the machine seal heat insulation inlet 19 and the outer side of a machine seal heat insulation outlet 16 are both provided with heating jackets, so as to, the left end of the pump body 1 is fixedly connected with a pump cavity heat-preservation inlet 15, and the right end of the pump body 1 is fixedly connected with a pump cavity heat-preservation outlet 14.

The working principle is that when the pump works, power is input from the driving shaft 5 and is transmitted to the driven shaft 6 through the synchronous gear 11, so that the left-handed threaded sleeve 7 and the right-handed threaded sleeve 8 which are arranged on the driving shaft 5 and the driven shaft 6 are driven to synchronously engage and move. At this time, the medium enters the low-pressure cavity of the pump body 1 from the inlet of the pump body 1, then enters the spiral groove formed by the left-handed thread insert 7, the right-handed thread insert 8 and the bushing 2 from the two sides of the pump body 1, is conveyed to the high-pressure cavity of the pump body 1 along the axial direction along with the continuous rotation of the driving shaft 5 and the driven shaft 6, and is finally discharged through the outlet of the pump body 1. The periphery of the pump body 1 is provided with a 360-degree omnibearing heating cavity, high-temperature steam or heat conduction oil is introduced into the heating cavity to heat the medium in the pump body 1, so that the conveyed medium in the pump body 1 is ensured to be always kept at the optimal liquefaction and conveying temperature, and solidification caused by the fact that the medium temperature is lower than the liquid-solid conversion temperature of the medium is prevented, and the pump is blocked and loses pumping efficiency. The front bearing block 3 and the rear bearing block 4 are provided with a heating cavity at the connecting end with the pump body 1, and a tight insulating sleeve is covered on the atmosphere end of the mechanical seal 13 by introducing high-temperature steam or heat conducting oil into the heating cavity, so that the pumping medium normally leaked from the mechanical seal 13 can not be cured, and the hidden trouble that the mechanical seal 13 fails due to the curing of the leaked medium at the atmosphere end of the mechanical seal 13 is prevented. The front bearing seat 3 and the rear bearing seat 4 are provided with a cooling cavity on the periphery of the bearing installation cavity, and the heat generated in the running process of the rolling bearing 12 and the heat transmitted from the heating cavities of the pump body 1, the front bearing seat 3 and the rear bearing seat 4 are taken away by introducing normal-temperature fresh water into the cooling cavity, so that the temperature around the rolling bearing 12 is not more than the temperature allowed by the running of the bearing, and the rolling bearing 12 is ensured to run reliably for a long time.

In conclusion, the twin-screw pump for conveying high-freezing-point high-temperature fluid drives the synchronous gear 11 outside the driving shaft 5 to rotate through the rotation of the driving shaft 5, the synchronous gear 11 is installed on the outer sides of the driven shaft 6 and the driving shaft 5, the outer sides of the two synchronous gears 11 are meshed with each other, so that the driving shaft 5 can drive the driven shaft 6 to rotate, and the left-handed thread sleeve 7 and the right-handed thread sleeve 8 are fixedly installed on the outer sides of the driving shaft 5 and the driven shaft 6, so that when the driving shaft 5 drives the driven shaft 6 to rotate, the two pairs of thread sleeves are meshed with each other to rotate. The pump body 1 is wrapped in the heat-preservation jacket, so that media in all liquid receiving areas of the pump body 1 are sufficiently heated and preserved, and solidification of the media in the pump due to insufficient heat preservation is avoided. The omnibearing heat-preservation jacket structure ensures that residual liquid in the pump body 1 can be emptied smoothly, and reduces the labor intensity and danger when quick-wear parts such as the mechanical seal 13 are replaced. The front bearing seat 3 and the rear bearing seat 4 are both provided with cooling jackets, and the heat generated when the rolling bearing 12 operates and the heat transmitted from the heat-insulating jackets on the pump body 1 and the bearing seats can be timely taken away by cooling water, so that the rolling bearing 12 can work in a proper temperature range.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A twin-screw pump that high freezing point high temperature fluid transport used, includes the pump body (1), its characterized in that: the pump is characterized in that a bushing (2) is fixedly connected to the inner side of the pump body (1), a left-handed screw sleeve (7) is installed in an inner hole of the bushing (2), a right-handed screw sleeve (8) is installed in an inner hole of the bushing (2), a mechanical seal (13) is installed at the outer ends of the left-handed screw sleeve (7) and the right-handed screw sleeve (8), a driving shaft (5) and a driven shaft (6) are movably connected with a front bearing seat (3) and a rear bearing seat (4) through a rolling bearing (12), a front bearing seat (3), a rear bearing seat (4) and a sealing box body (10) are fixedly connected to the two ends of the pump body (1), a synchronizing gear (11) is movably connected to the left end of the rear bearing seat (4), a gear box (9) is fixedly connected to the left end of the rear bearing seat (4), a pump outlet (17) is formed, the pump comprises a pump body (1), a right end fixedly connected with machine seal heat preservation inlet (19) of the pump body (1), a right end fixedly connected with bearing cooling inlet (20) of the pump body (1), a left end fixedly connected with machine seal heat preservation outlet (16) of the pump body (1), a left end fixedly connected with pump cavity heat preservation inlet (15) of the pump body (1), and a right end fixedly connected with pump cavity heat preservation outlet (14) of the pump body (1).

2. The twin screw pump for high freezing point and high temperature fluid transfer of claim 1, wherein: the outside of the pump body (1) is provided with a 360-degree all-dimensional heat-insulating jacket, and the appearance of the pump body is cuboid.

3. The twin screw pump for high freezing point and high temperature fluid transfer of claim 1, wherein: the outer side of the pump body (1) is used for mounting external parts through a flange, and a flange mounting hole is a threaded blind hole.

4. The twin screw pump for high freezing point and high temperature fluid transfer of claim 1, wherein: and the front bearing seat (3) and the rear bearing seat (4) are both provided with a heating jacket and a cooling jacket.

5. The twin screw pump for high freezing point and high temperature fluid transfer of claim 1, wherein: the pump body (1) is of a double-suction type or a single-suction type, and the installation mode is horizontal installation or vertical installation.

6. The twin screw pump for high freezing point and high temperature fluid transfer of claim 1, wherein: the machine seal heat preservation inlet (19) is communicated with the machine seal heat preservation outlet (16) to form a heating jacket, and the heating jacket can be arranged on the front bearing seat (3) and the rear bearing seat (4) and also can be arranged on the sealing box body (10).

7. The twin screw pump for high freezing point and high temperature fluid transfer of claim 1, wherein: the front bearing seat (3) and the rear bearing seat (4) are formed by welding, and a heating jacket for heat preservation of the machine seal and a cooling jacket for heat dissipation of the bearing are arranged on the front bearing seat and the rear bearing seat.