Self-cleaning coal tar pump

Abstract

The utility model belongs to the technical field of coal tar pumps, and relates to a self-cleaning coal tar pump which comprises a pump shaft of the coal tar pump, an outer shell is installed in the middle of the pump shaft, impeller sets are sequentially and fixedly installed in the middle of the pump shaft from left to right, the impeller sets are located in an inner cavity of the outer shell, and each impeller set comprises four impellers. A pump cavity is formed between the impellers and an inner cavity of the outer shell, a first conveying pipeline is arranged between the two impeller sets, a medium inlet and a medium outlet are formed in the outer shell, heating equipment for diesel oil is arranged outside the medium inlet, and the medium inlet is communicated with the rightmost end of the pump cavity at the impeller set on the right side. And the rightmost end of the pump cavity at the impeller group on the left side is communicated with the medium outlet through a second conveying pipeline. The self-cleaning pump has the advantages that the medium inlet is formed, diesel oil is introduced into the pump cavity through the medium inlet, the diesel oil can clean coal tar in the pump cavity, and the self-cleaning purpose is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal tar pumps and relates to a self-cleaning coal tar pump. Background Art

[0002] Coal tar pumps are mainly used as coal tar delivery pumps. They are specially designed for the transfer, pressurization, injection, combustion and deep processing of heavy oil and coal tar.

[0003] A high-temperature coal tar pump disclosed in Chinese patent CN204458374U is designed as a centrifugal pump. The prime mover drives the impeller to rotate through the shaft and the bearing body, sucks the liquid into the pump from the inlet and discharges it to the outlet. The impeller plays a leading role in the pump. The blades in the impeller force the liquid to rotate, and the liquid is thrown out to the surroundings under the action of centrifugal force.

[0004] If the coal tar pump has any abnormality during use, the pump will suddenly stop running, and the temperature of the pump will drop. In addition, due to the high viscosity of coal tar, it is difficult to drain it out in time through the drain valve. Therefore, the coal tar will coke in the pump within one hour, causing the pump impeller to be blocked and unable to rotate. The pump needs to be returned to the factory for treatment. The time and cost of returning to the factory are high, which affects the production of coal tar.

[0005] In order to solve the above problems, the utility model proposes a self-cleaning coal tar pump. Utility Model Content

[0006] In order to solve the problems existing in the background technology, the utility model proposes a self-cleaning coal tar pump.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: comprising a pump shaft of a coal tar pump, an outer shell is installed in the middle of the pump shaft, an impeller group is fixedly installed in the middle of the pump shaft from left to right, and the impeller group is located in the inner cavity of the outer shell;

[0008] Each impeller group includes four impellers, a pump cavity is formed between the impellers and the inner cavity of the outer shell, and a first delivery pipeline is arranged between the two impeller groups;

[0009] The outer shell is provided with a medium inlet for allowing diesel and coal tar to enter and a medium outlet for allowing diesel and coal tar to enter, a diesel heating device is provided outside the medium inlet, and the medium inlet is connected to the rightmost end of the pump chamber at the right impeller group;

[0010] The rightmost end of the pump chamber at the left impeller assembly is communicated with the medium outlet through a second delivery pipeline.

[0011] Furthermore, the left end of the pump shaft is provided with a rear bearing body and a non-driving end of the mechanical seal in sequence from left to right, and the left end of the outer shell is installed with a large cover through a large cover bolt, and the large cover is fixedly mounted with the non-driving end of the mechanical seal.

[0012] Furthermore, the right end of the pump shaft is provided with a front bearing body and a mechanical seal driving end in sequence from right to left, and the mechanical seal driving end is fixedly fitted with the right end of the outer shell.

[0013] Furthermore, a first switch valve, a second switch valve, a third switch valve, and a fourth switch valve are installed on the outer surface of the outer shell. The first switch valve is connected to the first delivery pipe through a sewage pipe, the second switch valve is connected to the pump chamber at the right impeller group through the sewage pipe, the third switch valve is connected to the medium inlet through the sewage pipe, and the fourth switch valve is connected to the pump chamber at the left impeller group through the sewage pipe.

[0014] Furthermore, valves are connected to the first delivery pipeline and the second delivery pipeline via flanges.

[0015] Furthermore, the left end of the first delivery pipeline is communicated with the leftmost end of the pump chamber at the left impeller assembly, and the right end of the first delivery pipeline is communicated with the pump chamber at the right impeller assembly.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The self-cleaning coal tar pump is provided with a medium inlet and a medium outlet, both of which can pass diesel and coal tar. When in use, the coal tar is transported by passing the coal tar into the coal tar pump. When the coal tar pump is damaged and needs to be cleaned, the diesel is passed into the coal tar pump through the medium inlet. The diesel passes through the right pump chamber, the first delivery pipeline, the left pump chamber, the second delivery pipeline in sequence, and is finally discharged through the medium outlet, so that the diesel flushes the coal tar when it flows through. After flushing, the coal tar can continue to be passed in for use, so as to achieve the purpose of self-cleaning. In addition, the diesel is compatible with the original coal tar, and there is no need to return to the factory to stop production or disassemble and clean the coal tar pump, which saves time and reduces economic losses.

[0018] 2. The first switch valve, the second switch valve, the third switch valve and the fourth switch valve are installed on the outer side of the outer shell, which can discharge the diesel through different sewage pipes, dilute the coal tar in the dead corner of the coal tar pump, and clean it more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a flow diagram of diesel or coal tar in the utility model.

[0021] In the figure: 1. pump shaft; 2. first delivery pipeline; 3. mechanical seal drive end; 4. front bearing body; 5. impeller; 6. medium inlet; 7. pump chamber; 8. mechanical seal non-drive end; 9. large cover; 10. large cover bolts; 13. outer shell; 14. second delivery pipeline; 15. medium outlet; 16. rear bearing body; 17. first switch valve; 18. second switch valve; 19. third switch valve; 20. fourth switch valve; 21. sewage pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-Figure 2 As shown, the technical solution adopted by the utility model is as follows: a self-cleaning coal tar pump, comprising a pump shaft 1 of the coal tar pump. An outer shell 13 is installed in the middle of the pump shaft 1, and an impeller group is fixedly installed in the middle of the pump shaft 1 from left to right, and the impeller group is in the inner cavity of the outer shell 13.

[0024] Each impeller group includes four impellers 5, which are connected to each other in sequence, and a pump cavity 7 is formed between the impeller 5 and the inner cavity of the outer shell 13. A first delivery pipeline 2 is arranged between the two impeller groups, and the left end of the first delivery pipeline 2 is connected to the leftmost end of the pump cavity 7 at the left impeller group, and the right end of the first delivery pipeline 2 is connected to the pump cavity 7 at the right impeller group.

[0025] The outer shell 13 is provided with a medium inlet 6 and a medium outlet 15. A diesel heating device is provided outside the medium inlet 6, and the medium inlet 6 is connected to the rightmost end of the pump chamber 7 at the right impeller group. The heating temperature set in the heating device is 150-170°C, and the diesel is heated by the heating device, wherein the optimal heating temperature is 160°C.

[0026] The rightmost end of the pump chamber 7 at the left impeller assembly is communicated with the medium outlet 15 via a second delivery pipeline 14 .

[0027] The outer surface of the outer shell 13 is equipped with a first switch valve 17, a second switch valve 18, a third switch valve 19, and a fourth switch valve 20. The first switch valve 17 is connected to the first delivery pipeline 2 through a sewage pipe 21. The second switch valve 18 is connected to the pump chamber 7 at the right impeller group through the sewage pipe 21. The third switch valve 19 is connected to the medium inlet 6 through the sewage pipe 21. The fourth switch valve 20 is connected to the pump chamber 7 at the left impeller group through the sewage pipe 21.

[0028] The first delivery pipeline 2 and the second delivery pipeline 14 are both connected with valves through flanges. The valves cooperate with the first switch valve 17, the second switch valve 18, the third switch valve 19, and the fourth switch valve 20 to control the size and flow direction of the diesel, so that the diesel can clean the dead corners in the coal tar pump.

[0029] The left end of the pump shaft 1 is provided with a rear bearing body 16 and a mechanical seal non-driving end 8 in sequence from left to right. A large cover 9 is installed on the left end of the outer shell 13 through a large cover bolt 10, and the large cover 9 is fixedly matched with the mechanical seal non-driving end 8.

[0030] The right end of the pump shaft 1 is provided with a front bearing body 4 and a mechanical seal driving end 3 in sequence from right to left. The mechanical seal driving end 3 is fixedly fitted with the right end of the outer shell 13 .

[0031] Working principle:

[0032] When the coal tar in the coal tar pump needs to be flushed, the diesel is heated by a heating device, and the diesel is heated to 160° C. and then introduced into the medium inlet 6. The diesel will enter the sewage pipe 21 at the third switch valve 19.

[0033] The diesel oil will enter the impeller 5 on the right side and pass through the pump chamber 7 on the right side. The diesel oil will enter the sewage pipe 21 at the second switch valve 18.

[0034] After that, the diesel passes through the first delivery pipeline 2 and enters the sewage pipeline 21 at the first switch valve 17 .

[0035] After that, the diesel oil enters the impeller 5 on the left side and passes through the pump chamber 7 on the left side. The diesel oil will enter the sewage pipe 21 at the fourth switch valve 20.

[0036] The diesel in the left pump chamber 7 passes through the second delivery pipe 14 and is discharged at the medium outlet 15. Since diesel has the effect of diluting and dissolving coal tar at 160°C, the diesel will clean the coal tar in the coal tar pump when it flows through, achieving the purpose of self-cleaning.

[0037] When the diesel is introduced, the size of the diesel flushing can be controlled by operating the valves on the first delivery pipeline 2 and the second delivery pipeline 14 .

[0038] By operating the first switch valve 17, the second switch valve 18, the third switch valve 19, and the fourth switch valve 20, the diesel can be discharged through the corresponding sewage pipe 21, diluting the coal tar in the dead corner of the coal tar pump to make the cleaning more thorough. At the same time, the valves can be operated together to change the flow direction of the diesel.

[0039] After flushing, drain the diesel. Diesel has no side effects on coal tar pumps, and diesel is compatible with the original coal tar and does not affect its use.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-cleaning coal tar pump, characterized in that: The invention comprises a pump shaft (1) of a coal tar pump, wherein an outer shell (13) is installed in the middle of the pump shaft (1), and an impeller assembly is fixedly installed in the middle of the pump shaft (1) from left to right, and the impeller assembly is located in the inner cavity of the outer shell (13); Each impeller assembly comprises four impellers (5), a pump chamber (7) is formed between the impellers (5) and the inner cavity of the outer shell (13), and a first delivery pipeline (2) is arranged between the two impeller assemblies; The outer shell (13) is provided with a medium inlet (6) for allowing diesel and coal tar to enter and a medium outlet (15) for allowing diesel and coal tar to enter, a diesel heating device is provided outside the medium inlet (6), and the medium inlet (6) is connected to the rightmost end of the pump chamber (7) at the right impeller assembly; The rightmost end of the pump chamber (7) at the left impeller assembly is connected to the medium outlet (15) via a second delivery pipeline (14).

2. A self-cleaning coal tar pump according to claim 1, characterized in that: The left end of the pump shaft (1) is provided with a rear bearing body (16) and a mechanical seal non-driving end (8) in sequence from left to right, and the left end of the outer shell (13) is installed with a large cover (9) via a large cover bolt (10), and the large cover (9) is fixedly mounted with the mechanical seal non-driving end (8).

3. A self-cleaning coal tar pump according to claim 1, characterized in that: The right end of the pump shaft (1) is provided with a front bearing body (4) and a mechanical seal drive end (3) in sequence from right to left, and the mechanical seal drive end (3) is fixedly matched and installed with the right end of the outer shell (13).

4. A self-cleaning coal tar pump according to claim 1, characterized in that: A first switch valve (17), a second switch valve (18), a third switch valve (19), and a fourth switch valve (20) are installed on the outer surface of the outer shell (13); the first switch valve (17) is connected to the first delivery pipeline (2) through a sewage pipe (21); the second switch valve (18) is connected to the pump chamber (7) at the right impeller group through the sewage pipe (21); the third switch valve (19) is connected to the medium inlet (6) through the sewage pipe (21); and the fourth switch valve (20) is connected to the pump chamber (7) at the left impeller group through the sewage pipe (21).

5. A self-cleaning coal tar pump according to claim 1, characterized in that: The first delivery pipeline (2) and the second delivery pipeline (14) are both connected to valves via flanges.

6. A self-cleaning coal tar pump according to claim 1, characterized in that: The left end of the first delivery pipeline (2) is connected to the leftmost end of the pump chamber (7) at the left impeller assembly, and the right end of the first delivery pipeline (2) is connected to the pump chamber (7) at the right impeller assembly.

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