CN220134217U - Operation protection system for slurry type shielding pump - Google Patents
Operation protection system for slurry type shielding pump Download PDFInfo
- Publication number
- CN220134217U CN220134217U CN202321430604.0U CN202321430604U CN220134217U CN 220134217 U CN220134217 U CN 220134217U CN 202321430604 U CN202321430604 U CN 202321430604U CN 220134217 U CN220134217 U CN 220134217U
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- China
- Prior art keywords
- pump
- protection system
- circulating water
- canned motor
- heat exchanger
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- 239000002002 slurry Substances 0.000 title abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an operation protection system for a slurry type shielding pump, which comprises a shielding pump, an auxiliary impeller and a circulating water heat exchanger, wherein the auxiliary impeller is arranged in the shielding pump, the circulating water heat exchanger is positioned above the shielding pump and is connected with the shielding pump, one end of the shielding pump is provided with a pipeline, the pipeline is connected with a high-level liquid tank, a remote transmission pressure gauge and a remote transmission liquid level gauge are arranged on the high-level liquid tank, and when the liquid level in the high-level liquid tank is reduced to a set value, the shielding pump stops operating. Thereby improving the operation stability of the slurry type shielding pump and avoiding the damage of particles in the medium to the pump and the motor.
Description
Technical Field
The utility model relates to a slurry shield pump technology, in particular to an operation protection system for a slurry shield pump.
Background
As environmental and occupational health standards become more stringent, canned motor pumps are widely used in the petrochemical industry. The shielding pump and the magnetic pump are non-sealing centrifugal pumps, are integrated with the pump and the motor, are suitable for conveying corrosive, inflammable, explosive, toxic, harmful or precious media, structurally have only static seals and no dynamic seals, and can ensure that no medium leaks in the conveying process.
In operation, the canned motor pump generates heat, and the bearings, thrust discs and other media which need to be cleaned are lubricated and cooled. Conventional canned motor pumps cannot deliver a medium containing solid particles, and when the solid particles are inevitably contained in the delivered medium, the bearings wear, resulting in breakage of the bearings.
The conventional slurry type shielding pump adopts two forms of mechanical seal, filling liquid, a metering pump and the like to protect the shielding pump, once the mechanical seal is broken or the metering pump is damaged, particles in a medium can scratch a stator and rotor shielding sleeve, the medium enters into a stator cavity and a rotor cavity, so that a motor is seriously damaged, and the shielding pump must be returned to a manufacturing plant for maintenance.
Disclosure of Invention
Based on the technical problems, the utility model provides an operation protection system for a slurry type canned motor pump, which comprises
The technical scheme of the utility model is realized as follows:
the utility model provides an operation protection system for mud type canned motor pump, its characterized in that includes canned motor pump, vice impeller and circulating water heat exchanger, vice impeller is installed in canned motor pump, and circulating water heat exchanger is located canned motor pump top, and with canned motor pump connects, canned motor pump one end has a pipeline, and this pipeline is connected with the high-order cistern, be equipped with teletransmission manometer, teletransmission level gauge on the high-order cistern, work as liquid level in the high-order cistern drops to the setting value, canned motor pump stop operation.
In the utility model, a safety valve is arranged on the pipeline, and the outlet of the safety valve is connected with a metering pump.
In the present utility model, the metering pump has two ports, one of which is connected to a safety valve and the other of which is connected to an external medium.
In the utility model, the metering pump is a pressure source, wherein the pressure of a sealed cavity of the canned motor pump is higher than the pressure of a pump port of the metering pump.
In the present utility model, the circulating water heat exchanger exchanges heat with the external medium.
In the utility model, the high-level liquid tank is provided with a nitrogen charging port which is used for charging nitrogen into the high-level liquid tank and keeping the internal constant pressure of the high-level liquid tank.
In the utility model, the internal pressure of the high-level liquid tank is higher than the pressure of the sealed cavity of the shielding pump.
In the present utility model, the external medium is a clean liquid that has no effect on the process.
In the utility model, the circulating water heat exchanger is provided with a circulating water inlet pipe and a circulating water outlet pipe.
The operation protection system for the slurry type canned motor pump has the following beneficial effects: according to the utility model, the metering pump is arranged at one end of the pipeline, the metering pump is used as a pressure source, the pressure of the sealed inner cavity of the shielding pump is ensured to be higher than the pressure of the pump port of the metering pump, and the bearing chamber and the stator and rotor shielding sleeve of the shielding pump 1 are protected by positive pressure.
The remote pressure gauge and the remote liquid level gauge are arranged on the high-level liquid tank. The remote liquid level meter monitors the liquid level in the high-level liquid tank, when the liquid level in the high-level liquid tank is reduced to a set value, the DCS system is warned, the shielding pump is stopped in time, and the damage to the stator of the shielding pump is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
the reference numerals are expressed as: the device comprises a 1-shielding pump, a 2-auxiliary impeller, a 3-circulating water heat exchanger, a 4-pipeline, a 5-metering pump, a 6-installation valve, a 7-high-level liquid tank, an 8-remote pressure gauge, a 9-remote liquid level gauge, a 201-circulating water inlet pipe and a 202-circulating water outlet pipe.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1, the operation protection system for a slurry type canned motor pump of the present utility model includes a canned motor pump 1, a secondary impeller 2, and a circulating water heat exchanger 3. The auxiliary impeller 2 is arranged in the canned motor pump 1, and the circulating water heat exchanger 3 is positioned above the canned motor pump 1 and is connected with the canned motor pump 1. The canned motor pump 1 has a pipe 4 at one end, and an external medium is fed into the canned motor pump 1 through the pipe 4. Wherein the external medium is clean liquid which has no influence on the process. One end of the pipeline 4 is also provided with a metering pump 5, and when an external medium is conveyed to the canned motor pump 1, the metering pump 5 is a pressure source, so that the pressure of a sealed inner cavity of the canned motor pump 1 is ensured to be higher than the pressure of a pump port of the metering pump 5. The bearing chamber and stator and rotor shielding sleeve of the positive pressure protection shielding pump 1 are adopted. At the same time, the external medium input counter-impeller 2 establishes an internal circulation within the canned pump 1, thereby reducing the amount of external medium entering the protection system.
In the present embodiment, the circulating water heat exchanger 3 exchanges heat with an external medium flowing through the canned pump 1. The circulating water heat exchanger 3 has a circulating water inlet pipe 201 and a circulating water outlet pipe 202. The circulating water enters the shell pass of the circulating water heat exchanger 3 from the circulating water inlet pipe 201 and flows out from the circulating water outlet pipe 202, so that the normal operation of the circulating water heat exchanger 3 is ensured.
In this embodiment, to prevent overpressure in the pipe 4 and the canned pump 1, a safety valve 6 is provided between the pipe 4 and the metering pump 5, the outlet of the safety valve 6 being connected to the metering pump 5. The metering pump 5 has two ports, one of which is connected to the safety valve 6 and the other to the external medium. The safety valve 6 serves to further protect the stable operation of the canned motor pump 1.
In this embodiment, the pipeline 4 is connected with a high-level liquid tank 7, the high-level liquid tank 7 is arranged at a high position, and the high-level liquid tank 7 is filled with pollution-free circulating medium. The high-level liquid tank 7 has a nitrogen charging port for charging nitrogen gas into the high-level liquid tank and maintaining the inside of the high-level liquid tank 7 at a constant pressure. Wherein the internal pressure of the high-level liquid tank 7 is higher than the pressure of the sealed cavity of the canned motor pump 1.
In this embodiment, to avoid that the normal and stable operation of the canned motor pump 1 is affected by the runaway or damage of the metering pump 5. The high-level liquid tank 7 is provided with a remote pressure gauge 8 and a remote liquid level gauge 9. The remote pressure gauge 8 is used for monitoring the internal pressure of the high-level liquid tank 7. The remote liquid level meter 9 is used for monitoring the liquid level in the high-level liquid tank 7, and when the liquid level in the high-level liquid tank 7 is reduced to a set value, the DCS system is warned, the shielding pump 1 is stopped in time, and the damage to the stator of the shielding pump 1 is avoided.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (8)
1. The utility model provides an operation protection system for mud type canned motor pump, its characterized in that includes canned motor pump, vice impeller and circulating water heat exchanger, vice impeller is installed in canned motor pump, and circulating water heat exchanger is located canned motor pump top, and with canned motor pump connects, canned motor pump one end has a pipeline, and this pipeline is connected with the high-order cistern, be equipped with teletransmission manometer, teletransmission level gauge on the high-order cistern, work as liquid level in the high-order cistern drops to the setting value, canned motor pump stop operation.
2. The protection system according to claim 1, wherein a safety valve is mounted on the pipe, and an outlet of the safety valve is connected to a metering pump.
3. The protection system according to claim 2, characterized in that the metering pump has two ports, one of which is connected to a safety valve and the other to an external medium.
4. A protection system according to claim 3, wherein the metering pump is a pressure source, wherein the canned pump seal chamber pressure is higher than the pump port pressure of the metering pump.
5. The protection system of claim 4, wherein the circulating water heat exchanger exchanges heat with the external medium.
6. The protection system of claim 5, wherein the elevated tank has a nitrogen fill port for flushing nitrogen into the elevated tank and maintaining a constant pressure within the elevated tank.
7. The protection system of claim 6, wherein the elevated tank internal pressure is higher than the canned pump seal chamber pressure.
8. The protection system of claim 7, wherein the circulating water heat exchanger has a circulating water inlet pipe and a circulating water outlet pipe thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321430604.0U CN220134217U (en) | 2023-06-07 | 2023-06-07 | Operation protection system for slurry type shielding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321430604.0U CN220134217U (en) | 2023-06-07 | 2023-06-07 | Operation protection system for slurry type shielding pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220134217U true CN220134217U (en) | 2023-12-05 |
Family
ID=88961081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321430604.0U Active CN220134217U (en) | 2023-06-07 | 2023-06-07 | Operation protection system for slurry type shielding pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220134217U (en) |
-
2023
- 2023-06-07 CN CN202321430604.0U patent/CN220134217U/en active Active
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