CN215890449U - Double-suction double-screw pump for conveying liquid sulfur - Google Patents
Double-suction double-screw pump for conveying liquid sulfur Download PDFInfo
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- CN215890449U CN215890449U CN202122421360.7U CN202122421360U CN215890449U CN 215890449 U CN215890449 U CN 215890449U CN 202122421360 U CN202122421360 U CN 202122421360U CN 215890449 U CN215890449 U CN 215890449U
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Abstract
The utility model discloses a double-suction double-screw pump for conveying liquid sulfur, which comprises: the pump body, the pump body is double-deck casing, and the cavity is carried for liquid sulphur to the inlayer casing, and liquid sulphur carries the cavity to include import cavity and export cavity, is provided with liquid sulphur import flange and liquid sulphur export flange on the pump body, and liquid sulphur import flange is connected with the import cavity, and liquid sulphur export flange is connected with the export cavity, is provided with the initiative screw rod and the driven screw rod of meshing in the pump body, and the both sides of initiative screw rod and driven screw rod are provided with the spiral section. According to the double-suction double-screw pump for conveying the liquid sulfur, the spiral sections are arranged on the two sides of the driving screw and the driven screw, the liquid sulfur enters the inlet cavity through the liquid sulfur inlet flange, is sucked and pressurized by the spiral sections on the two sides simultaneously and conveyed to the outlet cavity, and is discharged by the liquid sulfur outlet flange, the axial force balance is ensured through the bidirectional suction structure, the pump runs stably, the failure rate is reduced, and the double-suction double-screw pump is suitable for occasions with higher pressure.
Description
Technical Field
The utility model relates to the technical field of double-screw pumps, in particular to a double-suction double-screw pump for conveying liquid sulfur.
Background
The sulfur is in a solid state at normal temperature, has stable liquid fluid property when the temperature reaches 130-160 ℃, has the viscosity of about 7cSt, has good fluidity and is suitable for transportation.
At present, a submerged centrifugal pump is adopted to pump liquid sulfur, and the pump is required to be immersed in a liquid sulfur pool at 150 ℃ to realize the transportation. However, the service life of the pump is short, the maintenance difficulty is too large, and the use effect is not satisfactory.
The double-screw pump has strong self-absorption capacity, and in recent years, a single-suction double-screw pump installed on the ground is adopted to pump liquid sulfur, but the single-suction double-screw pump has frequent faults and leakage and has unsatisfactory use effect due to unbalanced axial force, insufficient overall heat insulation design of the pump, high pressure bearing of a mechanical sealing piece installed at the outlet end of the pump and other reasons.
Therefore, a double-suction twin-screw pump for delivering liquid sulfur is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double-suction double-screw pump for conveying liquid sulfur, which aims to solve the problems in the prior art, has a bidirectional suction structure, balanced axial force of screws, sufficient overall heat preservation of the pump, capability of ensuring stable operation of the pump and reduction of failure rate, and has high sealing reliability because a mechanical sealing element is arranged in an inlet cavity of the pump and bears lower suction pressure.
The utility model provides a double-suction double-screw pump for conveying liquid sulfur, which comprises:
the pump body, the pump body includes the double-deck casing of constituteing by outer casing and inlayer casing, the inlayer casing is liquid sulphur and carries the chamber, liquid sulphur carries the chamber including import cavity and export cavity, be provided with liquid sulphur import flange and liquid sulphur export flange on the pump body, liquid sulphur import flange with the import cavity is connected, liquid sulphur export flange with the export cavity is connected, be provided with engaged initiative screw rod and driven screw in the pump body, the initiative screw rod with driven screw's both sides are provided with the helical section.
The double-suction double-screw pump for conveying the liquid sulfur is characterized in that the outer layer of the connecting pipe of the inlet cavity, the outer layer of the connecting pipe of the outlet cavity, the connecting pipe of the liquid sulfur inlet flange and the outer layer of the connecting pipe of the liquid sulfur outlet flange are provided with a pump body heat-insulating cavity, heat-insulating steam is introduced into the pump body heat-insulating cavity, and the pump body heat-insulating cavity is provided with a pump body heat-insulating cavity steam inlet flange and a pump body heat-insulating cavity steam outlet flange.
The double-suction twin-screw pump for conveying liquid sulfur is characterized in that the front end and the rear end of the driving screw and the driven screw are respectively provided with a mechanical sealing piece, and each mechanical sealing piece is located in the inlet cavity.
The double-suction double-screw pump for conveying the liquid sulfur is preferably arranged such that a front end cap is provided at one end of the pump body and a rear end cap is provided at the other end of the pump body.
The double-suction double-screw pump for conveying the liquid sulfur is preferably arranged such that the front end cover is internally provided with an annular front end cover heat-insulating cavity, and the rear end cover is internally provided with an annular rear end cover heat-insulating cavity.
The double-suction double-screw pump for conveying the liquid sulfur is characterized in that the top of the front end cover heat-insulating cavity is connected with a first pipeline, and the other end of the first pipeline is connected to the upper part of the pump body heat-insulating cavity; the bottom of the front end cover heat-insulating cavity is connected with a second pipeline, and the other end of the second pipeline is connected to the bottom of the pump body heat-insulating cavity.
The double-suction double-screw pump for conveying the liquid sulfur is characterized in that the top of the rear end cover heat-insulating cavity is connected with a third pipeline, and the other end of the third pipeline is connected to the upper part of the pump body heat-insulating cavity; the bottom of the rear end cover heat-insulation cavity is connected with a fourth pipeline, and the other end of the fourth pipeline is connected to the bottom of the pump body heat-insulation cavity.
The double-suction double-screw pump for conveying the liquid sulfur is characterized in that the front end cover and the rear end cover are respectively provided with two mechanical seal seats, one side of each mechanical seal seat is connected to the mechanical seal element on the driving screw or the driven screw, the other side of each mechanical seal seat is provided with an axial seal ring, and the axial seal rings are matched with the driving screw or the driven screw to form axial seal so as to form a closed mechanical seal seat heat preservation cavity in the middle of the mechanical seal seats.
The double-suction double-screw pump for conveying liquid sulfur is characterized in that the top parts of the mechanical seal seat heat preservation cavities corresponding to the front end cover and the rear end cover are both connected with steam inlet pipelines, a throttle valve is arranged on the steam inlet pipelines, and the two steam inlet pipelines corresponding to the front end cover and the rear end cover are gathered on a mechanical seal seat steam inlet flange.
The double-suction double-screw pump for conveying the liquid sulfur is characterized in that the bottom of the mechanical seal seat heat preservation cavity corresponding to the front end cover and the bottom of the mechanical seal seat heat preservation cavity corresponding to the rear end cover are both connected with a steam outlet pipeline, and a mechanical seal seat steam outlet flange is arranged on the steam outlet pipeline.
The utility model provides a double-suction double-screw pump for conveying liquid sulfur, wherein spiral sections are arranged on two sides of a driving screw and a driven screw, the liquid sulfur enters an inlet cavity through a liquid sulfur inlet flange, is sucked and pressurized by the spiral sections on the two sides simultaneously and conveyed to an outlet cavity and then is discharged by a liquid sulfur outlet flange, and the bidirectional suction structure ensures the balance of axial force, the whole pump is fully insulated, the pump is stable in operation, the failure rate is reduced, and the double-suction double-screw pump can be suitable for higher-pressure occasions; the mechanical sealing element is arranged in the pump inlet cavity, bears lower inlet pressure and has high sealing reliability.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
FIG. 1 is a front view of an embodiment of a double-suction twin-screw pump for delivering liquid sulfur according to the present invention;
FIG. 2 is a left side view of an embodiment of a double-suction twin-screw pump for delivering liquid sulfur according to the present invention;
FIG. 3 is a sectional view of an embodiment of a double-suction twin-screw pump for delivering liquid sulfur according to the present invention;
fig. 4 is a cross-sectional view of an embodiment of a pump body of the double-suction twin-screw pump for delivering liquid sulfur provided by the utility model.
Description of reference numerals:
1-pump body 2-active screw
3-mechanical seal 4-mechanical seal seat
5-driven screw 6-axial sealing ring
7-front end cover 8-rear end cover
9-mechanical seal seat steam inlet flange 10-pump body heat preservation cavity steam inlet flange
11-liquid sulfur inlet flange 12-liquid sulfur outlet flange
13-third line 14-first line
15-second line 16-fourth line
17-mechanical seal seat steam outlet flange 18-pump body heat preservation cavity steam outlet flange
19-steam outlet line 20-inlet chamber
21-pump body heat preservation cavity 22-mechanical seal seat heat preservation cavity
23-front end cover heat preservation cavity 24-rear end cover heat preservation cavity
25-outlet chamber 26-valve
27-steam inlet line
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
At present, a submerged centrifugal pump is adopted to pump liquid sulfur, and the pump is required to be immersed in a liquid sulfur pool at 150 ℃ to realize the transportation. However, the service life of the pump is short, the maintenance difficulty is too large, and the use effect is not satisfactory. In order to solve the problem, a double-screw pump with strong self-suction capacity is adopted, in recent years, a single-suction double-screw pump installed on the ground is adopted to pump liquid sulfur, but the single-suction double-screw pump frequently fails and leaks and the using effect is not ideal due to various reasons that the axial force of the single-suction double-screw pump is unbalanced, the overall heat insulation design of the pump is insufficient, a mechanical sealing piece is installed at the outlet end of the pump to bear high pressure and the like.
As shown in fig. 1 to 3, an embodiment of the present invention provides a double-suction twin-screw pump for delivering liquid sulfur, including: the pump body 1, the pump body 1 includes the double-deck casing of constituteing by outer casing and inlayer casing, the inlayer casing is liquid sulphur transport chamber, liquid sulphur transport chamber includes import cavity 20 and export cavity 25, be provided with liquid sulphur import flange 11 and liquid sulphur export flange 12 on the pump body 1, liquid sulphur import flange 11 with import cavity 20 is connected, liquid sulphur export flange 12 with export cavity 25 is connected, be provided with engaged initiative screw rod 2 and driven screw rod 5 in the pump body 1, initiative screw rod 2 with the both sides of driven screw rod 5 are provided with the spiral section.
Wherein, the pump body 1 is an annular heat-insulating double-layer shell. Specifically, as shown in fig. 3 and 4, the inlet cavity 20, the outlet cavity 25, the connecting pipe of the liquid sulfur inlet flange 11 and the connecting pipe of the liquid sulfur outlet flange 12 are provided with a pump body heat preservation cavity 21 on the outer layer, heat preservation steam is introduced into the pump body heat preservation cavity 21, and the pump body heat preservation cavity steam inlet flange 10 and the pump body heat preservation cavity steam outlet flange 18 are arranged on the pump body heat preservation cavity 21. As shown in fig. 4, the heat preservation steam enters from the steam inlet flange 10 of the heat preservation cavity of the pump body above the pump body 1 and is discharged from the steam outlet flange 18 of the heat preservation cavity of the pump body below the pump body 1, so that the liquid sulfur conveying cavity of the inner layer of the pump body 1 is fully heat-traced and heat preserved, and the liquid sulfur can be maintained in the conveying temperature range.
In operation, liquid sulfur enters the inlet cavity 20 through the liquid sulfur inlet flange 11, is sucked and pressurized by the spiral sections for conveying media on the left side and the right side of the driving screw rod 2 and the driven screw rod 5 simultaneously and conveyed to the outlet cavity 25, and then is discharged through the liquid sulfur outlet flange 12. The bidirectional suction structure ensures the balance of axial force, the pump runs stably, and the pump can be applied to higher pressure occasions.
From this, for prior art, the liquid sulphur that this embodiment provided is carried and is used double-suction double screw pump, the both sides of initiative screw rod and driven screw all are provided with the spiral section, liquid sulphur passes through in the liquid sulphur import flange gets into the inlet cavity, inhale simultaneously and the pressure boost is carried to the export cavity back by the spiral section of both sides, discharge by liquid sulphur outlet flange, axial force balance has been guaranteed to two-way inspiratory structure, the whole heat preservation of pump is abundant, the pump operation is stable, the fault rate has been reduced, can be applicable to higher pressure occasion.
Further, as shown in fig. 3, mechanical seals 3 are disposed at the front and rear ends of the driving screw 2 and the driven screw 5, and each of the mechanical seals 3 is located in the inlet cavity 20. Therefore, the mechanical sealing element 3 only bears lower inlet pressure, the working environment of the mechanical sealing element 3 is improved, and the mechanical sealing is reliable.
Further, as shown in fig. 3, one end of the pump body 1 is provided with a front end cap 7, and the other end of the pump body 1 is provided with a rear end cap 8. An annular front end cover heat-insulating cavity 23 is arranged in the front end cover 7, and an annular rear end cover heat-insulating cavity 24 is arranged in the rear end cover 8. As shown in fig. 2, a first pipeline 14 is connected to the top of the front end cover heat-insulating cavity 23, and the other end of the first pipeline 14 is connected to the upper part of the pump body heat-insulating cavity 21; the bottom of the front end cover heat-insulating cavity 23 is connected with a second pipeline 15, and the other end of the second pipeline 15 is connected to the bottom of the pump body heat-insulating cavity 21. The top of the rear end cover heat-insulating cavity 24 is connected with a third pipeline 13, and the other end of the third pipeline 13 is connected to the upper part of the pump body heat-insulating cavity 21; the bottom of the rear end cover heat-insulating cavity 24 is connected with a fourth pipeline 16, and the other end of the fourth pipeline 16 is connected to the bottom of the pump body heat-insulating cavity 21. Heat preservation steam gets into front end housing heat preservation cavity 23 and rear end housing heat preservation cavity 24 from pump body heat preservation cavity 21 by third pipeline 13 and first 14 respectively, then get back to in pump body heat preservation cavity 21 by second pipeline 15 and fourth pipeline 16 respectively, front end housing and rear end housing can all be kept warm like this, make the liquid sulphur delivery chamber of the 1 inlayer of the pump body thoroughly isolated with outside air, the heat loss of the inside of the pump body 1 has been reduced, make the mechanical seal 3 that is close to front end housing 7 and rear end housing 8 department also can obtain more heat simultaneously, realize keeping warm.
Further, as shown in fig. 3, two mechanical seal seats 4 are respectively disposed on the front end cover 7 and the rear end cover 8, one side of each mechanical seal seat 4 is connected to the mechanical seal element 3 on the driving screw 2 or the driven screw 5, an axial seal ring 6 is disposed on the other side of each mechanical seal seat 4, and the axial seal ring 6 is matched with the driving screw 2 or the driven screw 5 to form an axial seal, so as to form a closed mechanical seal seat heat preservation chamber 22 in the middle of the mechanical seal seat 4.
Further, as shown in fig. 1, the top portions of the mechanical seal seat heat preservation cavities 22 corresponding to the front end cover 7 and the rear end cover 8 are both connected with a steam inlet pipeline 27, a valve 26 for throttling is arranged on the steam inlet pipeline 27, and as shown in fig. 2, the two steam inlet pipelines 27 corresponding to the front end cover 7 and the rear end cover 8 are gathered in the mechanical seal seat steam inlet flange 9. As shown in fig. 2, the bottoms of the mechanical seal seat heat preservation cavities 22 corresponding to the front end cover 7 and the rear end cover 8 are both connected with a steam outlet pipeline 19, and as shown in fig. 1, a mechanical seal seat steam outlet flange 17 is arranged on the steam outlet pipeline 19. The heat preservation steam is respectively entered into the heat preservation cavity 22 of the mechanical seal seat 4 along the steam inlet pipeline 27 after the pressure of the heat preservation steam is reduced from the steam inlet flange 9 of the mechanical seal seat through the valve 26, and then is respectively discharged from the steam outlet flange 17 of the mechanical seal seat along the steam outlet pipeline 19. The mechanical sealing element 3 connected with the mechanical sealing seat 4 can be fully heat-traced and insulated, and the liquid sulfur on the mechanical sealing element 3 can be maintained in a conveying temperature range. Meanwhile, the heat preservation steam can also take away the liquid sulfur leaked from the end face of the mechanical sealing element 3 on the driving screw 2 or the driven screw 5 inside the heat preservation cavity 22 of the mechanical sealing seat, and the liquid sulfur is guaranteed not to be condensed and accumulated on the outer side of the mechanical sealing element 3, so that the abrasion of the mechanical sealing element 3 is reduced, and the service life of the mechanical sealing element is prolonged.
According to the double-suction double-screw pump for conveying the liquid sulfur, provided by the embodiment of the utility model, the spiral sections are arranged on the two sides of the driving screw and the driven screw, the liquid sulfur enters the inlet cavity through the liquid sulfur inlet flange, is sucked and pressurized by the spiral sections on the two sides simultaneously and conveyed to the outlet cavity, and is discharged by the liquid sulfur outlet flange, the axial force balance is ensured by the bidirectional suction structure, the overall heat preservation and sufficient pump operation of the pump is stable, the failure rate is reduced, and the double-suction double-screw pump can be suitable for higher-pressure occasions; the mechanical sealing element is arranged in the pump inlet cavity, bears lower inlet pressure and has high sealing reliability.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. The utility model provides a liquid sulphur is carried and is used double-suction double screw pump which characterized in that includes:
the pump body, the pump body includes the double-deck casing of constituteing by outer casing and inlayer casing, the inlayer casing is liquid sulphur and carries the chamber, liquid sulphur carries the chamber including import cavity and export cavity, be provided with liquid sulphur import flange and liquid sulphur export flange on the pump body, liquid sulphur import flange with the import cavity is connected, liquid sulphur export flange with the export cavity is connected, be provided with engaged initiative screw rod and driven screw in the pump body, the initiative screw rod with driven screw's both sides are provided with the helical section.
2. The double-suction double-screw pump for conveying the liquid sulfur according to claim 1, wherein the inlet cavity, the outlet cavity, the connecting pipe of the liquid sulfur inlet flange and the outer layer of the connecting pipe of the liquid sulfur outlet flange are provided with a pump body heat preservation cavity, heat preservation steam is introduced into the pump body heat preservation cavity, and the pump body heat preservation cavity is provided with a pump body heat preservation cavity steam inlet flange and a pump body heat preservation cavity steam outlet flange.
3. The double suction twin screw pump for liquid sulfur delivery according to claim 1 wherein the drive screw and the driven screw are provided with mechanical seals at both the front and rear ends, and each mechanical seal is located in the inlet chamber.
4. The double-suction double-screw pump for conveying the liquid sulfur according to claim 1, wherein a front end cover is arranged at one end of the pump body, and a rear end cover is arranged at the other end of the pump body.
5. The double-suction double-screw pump for conveying the liquid sulfur according to claim 4, wherein an annular front end cover heat-insulating cavity is arranged inside the front end cover, and an annular rear end cover heat-insulating cavity is arranged inside the rear end cover.
6. The double-suction double-screw pump for conveying the liquid sulfur according to claim 5, wherein a first pipeline is connected to the top of the front end cover heat-insulating cavity, and the other end of the first pipeline is connected to the upper part of the pump body heat-insulating cavity; the bottom of the front end cover heat-insulating cavity is connected with a second pipeline, and the other end of the second pipeline is connected to the bottom of the pump body heat-insulating cavity.
7. The double-suction double-screw pump for conveying the liquid sulfur according to claim 5, wherein a third pipeline is connected to the top of the rear end cover heat-insulating cavity, and the other end of the third pipeline is connected to the upper part of the pump body heat-insulating cavity; the bottom of the rear end cover heat-insulation cavity is connected with a fourth pipeline, and the other end of the fourth pipeline is connected to the bottom of the pump body heat-insulation cavity.
8. The double-suction double-screw pump for conveying the liquid sulfur according to claim 7, wherein the front end cap and the rear end cap are respectively provided with two mechanical seal seats, one side of each mechanical seal seat is connected to the mechanical seal element on the driving screw or the driven screw, the other side of each mechanical seal seat is provided with an axial seal ring, and the axial seal rings are matched with the driving screw or the driven screw to form axial seal, so that a closed mechanical seal seat heat preservation cavity is formed in the middle of each mechanical seal seat.
9. The double-suction double-screw pump for conveying the liquid sulfur according to claim 8, wherein the top parts of the heat preservation cavities of the mechanical seal seat, corresponding to the front end cover and the rear end cover, are both connected with steam inlet pipelines, a valve for throttling is arranged on the steam inlet pipelines, and the two steam inlet pipelines corresponding to the front end cover and the rear end cover are gathered on a steam inlet flange of the mechanical seal seat.
10. The double-suction double-screw pump for conveying the liquid sulfur according to claim 8, wherein the bottoms of the heat preservation cavities of the mechanical seal seats corresponding to the front end cover and the rear end cover are both connected with a steam outlet pipeline, and a steam outlet flange of the mechanical seal seat is arranged on the steam outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122421360.7U CN215890449U (en) | 2021-09-28 | 2021-09-28 | Double-suction double-screw pump for conveying liquid sulfur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122421360.7U CN215890449U (en) | 2021-09-28 | 2021-09-28 | Double-suction double-screw pump for conveying liquid sulfur |
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| Publication Number | Publication Date |
|---|---|
| CN215890449U true CN215890449U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122421360.7U Active CN215890449U (en) | 2021-09-28 | 2021-09-28 | Double-suction double-screw pump for conveying liquid sulfur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890449U (en) |
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2021
- 2021-09-28 CN CN202122421360.7U patent/CN215890449U/en active Active
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