CN112196809A - Centrifugal pump discharge pressure relief device - Google Patents
Centrifugal pump discharge pressure relief device Download PDFInfo
- Publication number
- CN112196809A CN112196809A CN202011080925.3A CN202011080925A CN112196809A CN 112196809 A CN112196809 A CN 112196809A CN 202011080925 A CN202011080925 A CN 202011080925A CN 112196809 A CN112196809 A CN 112196809A
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- movable
- block
- pressure
- drainage
- centrifugal pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
- F04D15/0083—Protection against sudden pressure change, e.g. check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal pump flow-discharging pressure-reducing device, which can perform good flow-discharging pressure-reducing work on a centrifugal pump through the device when the centrifugal pump performs pressure-reducing work, performs flow-discharging work according to the actual pressure condition in a pump body, and further ensures the normal work of the centrifugal pump.
Description
Technical Field
The invention relates to the technical field of centrifugal pump devices, in particular to a centrifugal pump discharge pressure reducing device.
Background
Centrifugal water pumps are called centrifugal pumps for short; it is a water pumping machine using the centrifugal motion of water; consists of a pump shell, an impeller, a pump shaft, a pump frame and the like; before starting, filling water into the pump, driving the water in the pump to rotate at a high speed by the impeller which rotates after starting, and throwing the water out and pressing the water into the water outlet pipe by centrifugal motion; after the water is thrown out, the pressure near the impeller is reduced, and a low-pressure area is formed near the rotating shaft; the pressure is much lower than the atmospheric pressure, and the outside water rushes open the bottom valve under the action of the atmospheric pressure and enters the pump from the water inlet pipe; the water rushed in is thrown out again in high-speed rotation along with the impeller and is pressed into the water outlet pipe; the impeller is driven by the power machine to rotate at a high speed continuously, and water is continuously pumped from a low position to a high position; the pumping height of the centrifugal water pump is called as the lift; it adopts the methods of suction and throwing out to pump water; the basic structure of the centrifugal pump is composed of eight parts, which are respectively: the pump comprises an impeller, a pump body, a pump cover, a water retaining ring, a pump shaft, a bearing, a sealing ring, a stuffing box and an axial force balancing device, wherein the impeller is a core component of the water pump.
When the pressure of the pump body far exceeds the safe use limit value, the pressure reducing device in the prior art can recover the pressure of the pump body within the safe use limit value only by long-time pressure reducing work, so that the working efficiency is influenced, the pump body is possibly damaged, and the pump body cannot be normally used.
Disclosure of Invention
The invention aims to provide a centrifugal pump discharge pressure reducing device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a centrifugal pump discharge pressure reducing device comprises a centrifugal pump main body, a connecting column body, a discharge main body, a pressure limiting spring and a pressure reducing grading discharge mechanism;
the centrifugal pump is characterized in that connecting columns are symmetrically connected and arranged in the centrifugal pump main body, the other end of each connecting column is connected and provided with a drainage main body, a first pressure movable column is movably arranged in each connecting column, a second pressure movable column is movably arranged in each drainage main body, and the second pressure movable column is arranged at one end of the first pressure movable column;
the other end of the second pressure movable column is provided with a connecting pipe, the connecting pipe is movably inserted and arranged on the fixed round block, one end of the connecting pipe is connected with a pressure limiting spring, and the other end of the pressure limiting spring is arranged at one end of the fixed round block;
the first pressure movable column is internally provided with a drainage groove, the other end of the drainage groove is symmetrically provided with a drainage groove, the drainage grooves are symmetrically arranged in the second pressure movable column, the L-shaped movable blocks are symmetrically arranged at two sides of the second pressure movable column, the L-shaped movable blocks are movably provided with movable extrusion strips, one ends of the movable extrusion strips are provided with fixed blocks, the fixed blocks are provided with first reset springs at the same ends as the movable extrusion strips, and the side positions of the fixed blocks are movably provided with first movable insertion blocks;
a second movable insert block is arranged at one end of the first movable insert block, a second return spring is arranged at the same end of the first movable insert block as the second movable insert block, slopes are arranged at one end of the first movable insert block and one end of the fixed block, a movable seal strip is movably arranged at the other end of the movable extrusion strip, an extrusion chute is arranged on the movable seal strip, limiting lugs are arranged on two sides of the movable seal strip, and a third return spring is arranged on the limiting lugs;
the bottom of earial drainage main part is provided with first annular earial drainage groove and second annular earial drainage groove to first annular earial drainage groove and second annular earial drainage groove pass through the sealed circular groove of drainage and connect, and the hierarchical earial drainage mechanism symmetry of decompression sets up in the earial drainage main part.
Preferably, the pressure-reducing grading discharge mechanism comprises a first movable block, a transmission rack, an arc-shaped rack, a rotating round block, an extrusion bump, a movable extrusion piece, a limiting block, a concave movable groove, a second movable block and a sealing thimble, wherein the first movable block is symmetrically and movably arranged in the discharge main body, one end of the first movable block is provided with a slope, and the other end of the first movable block is provided with a fourth reset spring, the transmission rack is arranged at one side of the first movable block, the transmission rack is meshed with the arc-shaped rack, the arc-shaped rack is arranged at one side of the rotating round block, the rotating round block is movably arranged in the discharge main body, the extrusion bump is arranged at the other side of the rotating round block, the movable extrusion piece is movably arranged in the extrusion bump, a fifth reset spring is equidistantly arranged on the movable extrusion piece, and the second movable block is movably arranged at one side of the rotating round block, and a concave movable groove is arranged in the second movable block, a limit block is arranged in the concave movable groove, one end of the second movable block is connected with a sixth reset spring, and the other end of the second movable block is provided with a sealing thimble.
Preferably, the second annular launder has an inner diameter greater than the outer diameter of the first annular launder.
Preferably, the sealing thimble and the drainage sealing circular groove in the drainage main body are arranged at corresponding positions and in the same number, and the diameters of the sealing thimble and the drainage sealing circular groove are equal.
Preferably, the pressure-reducing grading drainage mechanisms are symmetrically arranged on two sides in the drainage main body, are arranged at equal intervals from top to bottom and are at least arranged into two groups.
Compared with the prior art, the invention has the beneficial effects that:
when the centrifugal pump is subjected to pressure reduction work, the centrifugal pump can be well subjected to flow discharge and pressure reduction work through the centrifugal pump pressure reducing device, the flow discharge work can be carried out according to the actual pressure condition in the pump body, and the normal work of the centrifugal pump is further ensured.
Drawings
FIG. 1 is a schematic view of a connection structure according to the present invention;
FIG. 2 is a top view, partially in section, of the internal connection between the connection post and the drain body of the present invention;
FIG. 3 is an enlarged view of a portion of the connection structure of FIG. 2 according to the present invention;
FIG. 4 is a bottom view, partially in section, of the internal connection between the connecting post and the drain body of the present invention;
FIG. 5 is an enlarged view of the connection structure of the pressure-reducing stepped draining mechanism in the figure of the present invention.
In the figure: the centrifugal pump comprises a centrifugal pump body 1, a connecting column 2, a discharge body 3, a first pressure movable column 4, a second pressure movable column 5, a connecting pipe 6, a fixed circular block 7, a pressure limiting spring 8, a discharge groove 9, an L-shaped movable block 10, a movable extrusion strip 11, a fixed block 12, a first movable insert 13, a second movable insert 14, a movable seal 15, an extrusion chute 16, a first annular discharge groove 17, a second annular discharge groove 18, a pressure-reducing grading discharge mechanism 19, a first movable block 1901, a transmission rack 1902, an arc-shaped rack 1903, a rotating circular block 1904, an extrusion lug 1905, a movable extrusion sheet 1906, a limiting block 1907, a concave movable groove 1908, a second movable block 1909 and a sealing thimble 1910.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.
Referring to fig. 1 to 5, the present invention provides a technical solution: the invention relates to a centrifugal pump flow-discharging pressure-reducing device, which comprises a centrifugal pump main body 1, a connecting column body 2, a flow-discharging main body 3, a pressure limiting spring 8 and a pressure-reducing grading flow-discharging mechanism 19;
the centrifugal pump comprises a centrifugal pump body 1, a connecting column body 2, a discharge body 3, a first pressure movable column 4, a second pressure movable column 5, a second pressure movable column, a first pressure movable column and a second pressure movable column, wherein the connecting column body 2 is symmetrically connected and arranged in the centrifugal pump body 1, the other end of the connecting column body 2 is movably connected and arranged, the first pressure movable column 4 is movably arranged in the connecting column body 2, and the second pressure;
the other end of the second pressure movable column 5 is provided with a connecting pipe 6, the connecting pipe 6 is movably inserted and arranged on the fixed round block 7, one end of the connecting pipe 6 is connected with a pressure limiting spring 8, and the other end of the pressure limiting spring 8 is arranged at one end of the fixed round block 7;
a drainage groove 9 is formed in the first pressure movable column 4, the other end of the drainage groove 9 is symmetrically provided with drainage grooves, the drainage grooves are symmetrically arranged in the second pressure movable column 5, the L-shaped movable blocks 10 are symmetrically arranged on two sides of the second pressure movable column 5, movable extrusion strips 11 are movably arranged in the L-shaped movable blocks 10, one end of each movable extrusion strip 11 is provided with a fixed block 12, the fixed block 12 is provided with a first return spring at the same end as the movable extrusion strips 11, and a first movable insertion block 13 is movably arranged at the side position of the fixed block 12;
a second movable insert block 14 is arranged at one end of the first movable insert block 13, a second return spring is arranged at the same end of the first movable insert block 13 as the second movable insert block 14, slopes are arranged at one end of the first movable insert block 13 and one end of the fixed block 12, a movable seal 15 is movably arranged at the other end of the movable extrusion strip 11, an extrusion chute 16 is arranged on the movable seal 15, limiting lugs are arranged on two sides of the movable seal 15, and a third return spring is arranged on the limiting lugs;
the bottom end of the drainage body 3 is provided with a first annular drainage groove 17 and a second annular drainage groove 18, the first annular drainage groove 17 and the second annular drainage groove 18 are connected through a drainage sealing circular groove, and the pressure-reducing grading drainage mechanism 19 is symmetrically arranged in the drainage body 3.
Further, the inner diameter of the second annular chute 18 is larger than the outer diameter of the first annular chute 17.
Furthermore, the sealing thimble 1910 corresponds to the drainage sealing circular groove in the drainage main body 3 in the arrangement position, the arrangement number is the same, and the arrangement diameter of the sealing thimble 1910 is equal to that of the drainage sealing circular groove.
Further, the pressure-reducing staged drainage mechanism 19 includes a first movable block 1901, a transmission rack 1902, an arc-shaped rack 1903, a rotating round block 1904, an extrusion bump 1905, a movable extrusion piece 1906, a limit block 1907, a concave movable groove 1908, a second movable block 1909, and a sealing thimble 1910, the first movable block 1901 is symmetrically and movably disposed in the drainage body 3, one end of the first movable block 1901 is provided with a slope, the other end is provided with a fourth return spring, the transmission rack 1902 is disposed at one side of the first movable block 1901, the transmission rack 1902 is engaged with the arc-shaped rack 1903, the arc-shaped rack 1903 is disposed at one side of the rotating round block 1904, the rotating round block 1904 is movably disposed in the drainage body 3, the other side of the rotating round block 1904 is provided with the extrusion bump 1905, the movable extrusion piece 1906 is movably disposed in the extrusion bump 1905, the fifth return spring is equidistantly disposed on the movable extrusion piece 1906, the second movable block 1909 is movably disposed at one side of the rotating round block 1904, a concave movable groove 1908 is formed in the second movable block 1909, a limit block 1907 is formed in the concave movable groove 1908, a sixth return spring is connected to one end of the second movable block 1909, and a sealing thimble 1910 is arranged at the other end of the second movable block 1909.
Further, the pressure-reducing classification drainage mechanisms 19 are symmetrically arranged on both sides of the drainage body 3, are arranged at equal intervals from top to bottom, and are arranged into at least two groups.
The working principle is as follows: when the centrifugal pump is subjected to pressure reduction and flow discharge work, the first pressure movable column 4, the second pressure movable column 5 and the pressure limiting spring 8 are arranged, when the pressure intensity in the pump body exceeds an installation and use limit value, the first pressure movable column 4 is extruded, the pressure is transmitted to the pressure limiting spring 8 through the second pressure movable column 5, the pressure limiting spring 8 is compressed when the pressure reaches the limit value, the first movable inserting block 13 arranged in the L-shaped movable block 10 at the side of the second pressure movable column 5 is extruded, the first movable inserting block 13 pushes the second movable inserting block 14 to perform memorial extrusion on the fixed block 12, the fixed block 12 pushes the movable extrusion strip 11 to extrude the extrusion chute 16 arranged on the movable seal strip 15, the seal of the movable seal strip 15 to the drainage groove is released, and meanwhile, the L-shaped movable block 10 extrudes the first movable block 1901 at the first stage in the pressure reduction and grading flow discharge mechanism 19, the first movable block 1901 drives the transmission rack 1902 and the arc rack 1903 to transmit, and then drives the rotation round block 1904 to rotate, so that the extrusion bump 1905 and the movable extrusion piece 1906 arranged on one side of the rotation round block 1904 extrude the limit block 1907 on the second movable block 1909, and further the sealing thimble 1910 arranged on the second movable block 1909 is separated from the drainage sealing circular groove, and the sealing is released, thereby realizing the drainage decompression operation, when the pressure in the pump body is too high, the L-shaped movable block 10 can continue to extrude the first movable block 1901 of the second stage in the decompression grading drainage mechanism 19, and further the sealing thimble 1910 in the second stage is separated from the drainage sealing circular groove, so that the drainage rate can be increased, the drainage decompression efficiency can be improved, therefore, when the decompression operation is performed on the centrifugal pump, the centrifugal pump can be well drained and decompressed through the present invention, according to the inside actual pressure condition of the pump body, the work of earial drainage is carried out, and then the normal work of centrifugal pump is guaranteed, earial drainage main part 3 through setting up, pressure is prescribed a limit to spring 8 and the hierarchical earial drainage mechanism 19 of decompression, can carry out hierarchical earial drainage decompression work to the centrifugal pump, when the inside pressure of the centrifugal pump body is too big, can carry out multistage earial drainage work according to its actual conditions, and then can improve the work efficiency to the decompression of the centrifugal pump body, let the inside pressure of the pump body can resume pressure fast within the safe limit value of using, advance the normal clear of guaranteeing centrifugal pump work, guarantee work efficiency, avoid the damage of centrifugal pump, ensure work economic benefits.
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 (5)
1. A centrifugal pump discharge pressure relief device which characterized in that: comprises a centrifugal pump main body (1), a connecting column body (2), a discharge main body (3), a pressure limiting spring (8) and a pressure reducing grading discharge mechanism (19);
the centrifugal pump is characterized in that connecting columns (2) are symmetrically connected and arranged in the centrifugal pump main body (1), the other ends of the connecting columns (2) are connected and provided with a drainage main body (3), a first pressure movable column (4) is movably arranged in the connecting columns (2), a second pressure movable column (5) is movably arranged in the drainage main body (3), and the second pressure movable column (5) is arranged at one end of the first pressure movable column (4);
the other end of the second pressure movable column (5) is provided with a connecting pipe (6), the connecting pipe (6) is movably inserted into the fixed round block (7), one end of the connecting pipe (6) is connected with a pressure limiting spring (8), and the other end of the pressure limiting spring (8) is arranged at one end of the fixed round block (7);
a drainage groove (9) is formed in the first pressure movable column (4), the other end of the drainage groove (9) is symmetrically provided with a drainage groove, the drainage groove is symmetrically arranged in the second pressure movable column (5), the L-shaped movable blocks (10) are symmetrically arranged on two sides of the second pressure movable column (5), a movable extrusion strip (11) is movably arranged in the L-shaped movable block (10), a fixed block (12) is arranged at one end of the movable extrusion strip (11), a first return spring is arranged at the same end of the fixed block (12) as the movable extrusion strip (11), and a first movable insertion block (13) is movably arranged at the side position of the fixed block (12);
a second movable insert block (14) is arranged at one end of the first movable insert block (13), a second return spring is arranged at the same end of the second movable insert block (14) of the first movable insert block (13), slopes are arranged at one end of the first movable insert block (13) and one end of the fixed block (12), a movable seal (15) is movably arranged at the other end of the movable extrusion strip (11), an extrusion chute (16) is arranged on the movable seal (15), limiting lugs are arranged on two sides of the movable seal (15), and a third return spring is arranged on the limiting lugs;
the bottom of earial drainage main part (3) is provided with first annular earial drainage groove (17) and second annular earial drainage groove (18) to first annular earial drainage groove (17) and second annular earial drainage groove (18) are connected through drainage sealing circular slot, and hierarchical earial drainage mechanism of decompression (19) symmetry sets up in earial drainage main part (3).
2. A centrifugal pump discharge pressure relief device according to claim 1, wherein: the pressure-reducing grading drainage mechanism (19) comprises a first movable block (1901), a transmission rack (1902), an arc-shaped rack (1903), a rotating round block (1904), an extrusion lug (1905), a movable extrusion sheet (1906), a limiting block (1907), a concave movable groove (1908), a second movable block (1909) and a sealing thimble (1910), wherein the first movable block (1901) is symmetrically and movably arranged in the drainage body (3), one end of the first movable block (1901) is provided with a slope, the other end of the first movable block is provided with a fourth return spring, the transmission rack (1902) is arranged on one side of the first movable block (1901), the transmission rack (1902) is meshed with the arc-shaped rack (1903), the arc-shaped rack (1903) is arranged on one side of the rotating round block (1904), the rotating round block (1904) is movably arranged in the drainage body (3), and the extrusion lug (1905) is arranged on the other side of the rotating round block (1904), the movable extrusion piece (1906) is movably arranged in the extrusion lug (1905), fifth reset springs are arranged on the movable extrusion piece (1906) at equal intervals, the second movable block (1909) is movably arranged on one side of the rotating round block (1904), a concave movable groove (1908) is arranged in the second movable block (1909), a limiting block (1907) is arranged in the concave movable groove (1908), a sixth reset spring is connected and arranged at one end of the second movable block (1909), and a sealing ejector pin (1910) is arranged at the other end of the second movable block (1909).
3. A centrifugal pump discharge pressure relief device according to claim 1, wherein: the inner diameter of the second annular drainage groove (18) is larger than the outer diameter of the first annular drainage groove (17).
4. A centrifugal pump discharge pressure relief device according to claim 2, wherein: the sealing thimble (1910) and the drainage sealing circular groove in the drainage main body (3) are arranged at corresponding positions and in the same number, and the diameters of the sealing thimble and the drainage sealing circular groove are equal.
5. A centrifugal pump discharge pressure relief device according to claim 2, wherein: the pressure-reducing grading drainage mechanism (19) is symmetrically arranged on two sides in the drainage main body (3), is arranged at equal intervals from top to bottom and is at least arranged into two groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080925.3A CN112196809A (en) | 2020-10-11 | 2020-10-11 | Centrifugal pump discharge pressure relief device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080925.3A CN112196809A (en) | 2020-10-11 | 2020-10-11 | Centrifugal pump discharge pressure relief device |
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| Publication Number | Publication Date |
|---|---|
| CN112196809A true CN112196809A (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011080925.3A Pending CN112196809A (en) | 2020-10-11 | 2020-10-11 | Centrifugal pump discharge pressure relief device |
Country Status (1)
| Country | Link |
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| CN (1) | CN112196809A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1176477A (en) * | 1966-09-27 | 1970-01-01 | Coal Industry Patents Ltd | Pressure Operated Valves |
| CN107763260A (en) * | 2017-10-20 | 2018-03-06 | 珠海格力电器股份有限公司 | Relief valve and air-conditioning system |
| CN208907489U (en) * | 2018-09-14 | 2019-05-28 | 王子薇 | A kind of hot-water heating automatic decompression device |
| CN209430818U (en) * | 2019-01-10 | 2019-09-24 | 何林海 | Adjustable pressure relief device |
| CN110529638A (en) * | 2019-08-20 | 2019-12-03 | 王美娟 | A kind of two-stage pressure release direct-acting overflow valve |
| CN110792818A (en) * | 2019-11-14 | 2020-02-14 | 冯森蕾 | Overflow valve with pressure adjustable structure |
-
2020
- 2020-10-11 CN CN202011080925.3A patent/CN112196809A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1176477A (en) * | 1966-09-27 | 1970-01-01 | Coal Industry Patents Ltd | Pressure Operated Valves |
| CN107763260A (en) * | 2017-10-20 | 2018-03-06 | 珠海格力电器股份有限公司 | Relief valve and air-conditioning system |
| CN208907489U (en) * | 2018-09-14 | 2019-05-28 | 王子薇 | A kind of hot-water heating automatic decompression device |
| CN209430818U (en) * | 2019-01-10 | 2019-09-24 | 何林海 | Adjustable pressure relief device |
| CN110529638A (en) * | 2019-08-20 | 2019-12-03 | 王美娟 | A kind of two-stage pressure release direct-acting overflow valve |
| CN110792818A (en) * | 2019-11-14 | 2020-02-14 | 冯森蕾 | Overflow valve with pressure adjustable structure |
Non-Patent Citations (1)
| Title |
|---|
| 宗望远: "《机械设计》", 31 August 2015, 华中科技大学出版社 * |
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Application publication date: 20210108 |