CN109253393B - Mechanical self-control type pipeline reversing device - Google Patents
Mechanical self-control type pipeline reversing device Download PDFInfo
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- CN109253393B CN109253393B CN201811320038.1A CN201811320038A CN109253393B CN 109253393 B CN109253393 B CN 109253393B CN 201811320038 A CN201811320038 A CN 201811320038A CN 109253393 B CN109253393 B CN 109253393B
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- valve
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- tee joint
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a mechanical self-control type pipeline reversing device which comprises a first valve, a second valve, a third valve, a fourth valve, a first filter screen, a second filter screen, an inlet tee joint, a first filter screen tee joint, an outlet tee joint, a second filter screen tee joint, a differential pressure gauge, an inlet flange and an outlet flange. The first valve, the second valve, the third valve and the fourth valve have two switch states: a. the first valve and the third valve are opened, and the second valve and the fourth valve are closed; b. the first valve and the third valve are closed, and the second valve and the fourth valve are opened; these two switch states correspond to two flow directions of the fluid within the device. Two measuring points of the differential pressure gauge are respectively arranged near the inlet flange and the outlet flange, the differential pressure measured by the differential pressure gauge is increased along with the increase of impurities filtered and accumulated by the filter screen, when the differential pressure is greater than a certain value, the states of the four valve change-over switches are indicated to change the flow direction, and fluid reversely flushes and takes away the impurities in the device.
Description
Technical Field
The invention relates to the field of connecting pipelines, in particular to a mechanical self-control type pipeline reversing device.
Background
Cooling water is usually required to be filtered before entering a heat exchanger, a Y-shaped filter is commonly used for filtering in industry, but the Y-shaped filter needs to be disassembled after filtering for a period of time and impurities and dirt in the cooling water are cleaned, when the cooling water contains more impurities, the cleaning is frequent, and when the Y-shaped filter is cleaned, the cooling water needs to be disconnected, which greatly affects the service performance of equipment which continuously works and extremely depends on the heat exchanger; when the heat exchanger needs to work continuously and impurities are not allowed to enter, water purification and supply equipment is sometimes used for carrying out real-time filtration operation, but the equipment is complex and the economic investment is large.
In addition, some pumps have weak overflowing capacity and are easy to block when encountering large-particle impurities, but the pumps run continuously in certain use scenes and cannot be stopped to clean the impurities filtered by the pump inlet.
Disclosure of Invention
The invention aims to provide a mechanical automatic control type pipeline reversing device to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a mechanical automatic control formula pipeline switching-over device, includes first valve, second valve, third valve, fourth valve, first filter screen, second filter screen, entry tee bend, first filter screen tee bend, export tee bend, second filter screen tee bend, differential pressure gauge, entry flange and export flange, and the entry flange is the device entry, and the export flange is the device export.
Furthermore, a first valve, a second valve, a third valve, a fourth valve, a first filter screen, a second filter screen, an inlet tee joint, a first filter screen tee joint, an outlet tee joint and a second filter screen tee joint are connected together through pipelines; the three-way mouth of pipe of inlet is connected to first valve one end, the three-way mouth of pipe of second filter screen is connected to the other end, a mouth of pipe of inlet tee is connected to second valve one end, a mouth of pipe of first filter screen tee is connected to the other end, a mouth of pipe of outlet tee is connected to third valve one end, a mouth of pipe of first filter screen tee is connected to the other end, a mouth of pipe of outlet tee is connected to fourth valve one end, a mouth of pipe of second filter screen tee is connected to the other end, the three-way third mouth of pipe of inlet tee connects the inlet flange, the three-way third mouth of pipe of outlet tee connects the outlet flange, the three-way third mouth of pipe of first filter screen connects first filter screen, the three-way.
The water inlet pipeline has two, and the outlet pipe way has two, structurally satisfies the demand that the pipeline chose the switching-over, and two filter screens realize filtering operation respectively in two kinds of flow directions, and only one kind of flow direction has at the same time, and only one filter screen is in operating condition. When the first filter screen is communicated with the inlet, namely the second valve is opened and the third valve is closed, the first filter screen carries out the filtering operation of the inlet water of the device, and when the second filter screen is communicated with the inlet, namely the first valve is opened and the fourth valve is closed, the second filter screen carries out the filtering operation of the inlet water of the device.
Furthermore, one measuring point of the differential pressure gauge is arranged on a pipeline between the inlet flange and the inlet tee joint, and the other measuring point of the differential pressure gauge is arranged on a pipeline between the outlet flange and the outlet tee joint. The differential pressure gauge measures the pressure difference between the two measuring points so as to provide parameters for subsequent operation, the pressure difference between the two measuring points can reflect the resistance condition inside the device, the larger the internal resistance is, the larger the pressure difference between the two points is, and the difference is an absolute value and has no direction difference. The internal resistance increases as the amount of impurities filtered by the first filter or the second filter increases.
First filter screen tee bend and second filter screen tee bend are the reducing tee bend, the nominal diameter of branch pipeline of first filter screen tee bend and second filter screen tee bend is the same with the nominal diameter of other parts in the device, the nominal diameter of main line of first filter screen tee bend and second filter screen tee bend is big ~ shelves than the nominal diameter of other parts in the device, the branch pipeline level of first filter screen tee bend and second filter screen tee bend is arranged, the main line is vertical to be arranged, the second valve is connected to the branch pipeline of first filter screen tee bend, the first valve is connected to the branch pipeline of second filter screen tee bend. The first filter screen tee joint and the second filter screen tee joint use a reducing tee joint with a large belly, and can contain more impurities than a small-caliber equal-diameter tee joint. The branch pipeline of the first filter screen tee joint and the branch pipeline of the second filter screen tee joint are horizontally arranged and connected with the second valve, and the branch pipeline of the second filter screen tee joint is connected with the first valve, so that impurities cannot fall to the first valve and the second valve when being discharged, and the impurities are not sufficiently discharged.
Furthermore, the first valve, the second valve, the third valve and the fourth valve have two switch states: a. the first valve and the third valve are opened, and the second valve and the fourth valve are closed; b. the first valve and the third valve are closed, and the second valve and the fourth valve are opened; the opening and closing states of the first valve, the second valve, the third valve and the fourth valve are interlocked with the differential pressure gauge, and when the pressure difference measured by the differential pressure gauge exceeds a set value, the opening and closing states of the first valve, the second valve, the third valve and the fourth valve are changed.
The two on-off states of the four valves correspond to the two flow directions of the device: a. when the first valve and the third valve are opened and the second valve and the fourth valve are closed, the flowing direction of the fluid is as follows: inlet flange-first valve-second filter-use equipment (heat exchanger, etc.) -first filter-third valve-outlet flange; b. the first valve and the third valve are closed, and when the second valve and the fourth valve are opened, the flowing direction of the fluid is as follows: inlet flange-second valve-first filter- "service equipment" (heat exchanger, etc.) -second filter-fourth valve-outlet flange. Such external water-using equipment needs no restriction on the direction of water flow. The set value of the differential pressure gauge is the intermediate value of the impurity-free pressure difference value and the pressure difference value when the impurity is fully accumulated when the device is used at two measuring points, so that the reversing operation can be carried out when about half of the impurity is accumulated, and the reversing operation is used for flushing the accumulated impurities away from the device: when the flow direction is above-mentioned flow direction a, impurity is filtered by the second filter screen and gets off, when the flow direction switches to flow direction b, fluid from the backward flow second filter screen, the accumulational impurity of second filter screen is taken away by the fluid, and the impurity that first filter screen filtered off in this flow direction can be taken away by the rivers of flow direction a, and the circulation is reciprocal like this, and continuous switching-over operation is with continuous filtration impurity.
When the 'use equipment' has specific requirements on the fluid flow direction, for example, when the device is used as an inlet filtering device of a pump, the inlet and the outlet of the pump cannot be used reversely, so the flow direction of two connecting ports of the device and the pump is not changed, at the moment, two sets of the devices can be combined for use, secondary reversing is carried out, eight valves of the two sets of the devices are interlocked together, the filtering function can be realized, and the flow direction of four external interfaces cannot be changed.
Further, the first valve, the second valve, the third valve and the fourth valve use butterfly valves. The butterfly valve can enhance the flow capacity of the valve, and is not easy to leak when dealing with fluid containing impurities compared with a ball valve and the like.
The diameters of the filter screen holes of the first filter screen and the second filter screen are 0.5-4 mm. The big then impurity particle degree that filters down is big more to the sieve mesh diameter of filter screen, and the impurity particle degree that filters down is little less for the sieve mesh aperture is little, but the filter screen flow resistance in too little sieve mesh aperture can be very big, and the loss of flow is many, selects suitable filter screen precision according to external equipment, can get less value to equipment such as heat exchanger, can get great value to equipment such as pumps.
The invention has the beneficial effects that: the invention can be used on the cooling water supply pipeline of the heat exchanger or the water inlet and outlet pipeline of the pump of which the pumping medium needs to be filtered, can continuously and uninterruptedly carry out filtering operation, has controllable filtering precision and reliably ensures the continuous use of the heat exchanger or the pump.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic flow chart of a mechanically self-controlled pipeline reversing device according to the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a schematic flow diagram of the combined use of two sets of piping sections according to the present invention;
fig. 4 is a perspective view of two sets of conduit sections in combination according to the present invention.
In the figure: 1-a first valve, 2-a second valve, 3-a third valve, 4-a fourth valve, 5-a first filter screen, 6-a second filter screen, 21-an inlet tee joint, 22-a first filter screen tee joint, 23-an outlet tee joint, 24-a second filter screen tee joint, 25-a differential pressure gauge, 31-an inlet flange and 32-an outlet flange.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the mechanical self-control type pipeline reversing device includes a first valve 1, a second valve 2, a third valve 3, a fourth valve 4, a first filter screen 5, a second filter screen 6, an inlet tee 21, a first filter screen tee 22, an outlet tee 23, a second filter screen tee 24, a differential pressure gauge 25, an inlet flange 31 and an outlet flange 32, where the inlet flange 31 is an inlet of the device and the outlet flange 32 is an outlet of the device.
The first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the first filter screen 5, the second filter screen 6, the inlet tee joint 21, the first filter screen tee joint 22, the outlet tee joint 23 and the second filter screen tee joint 24 are connected together through pipelines; an orifice of inlet tee bend 21 is connected to 1 one end of first valve, an orifice of second filter screen tee bend 24 is connected to the other end, an orifice of inlet tee bend 21 is connected to 2 one ends of second valve, an orifice of first filter screen tee bend 22 is connected to the other end, an orifice of export tee bend 23 is connected to 3 one ends of third valve, an orifice of first filter screen tee bend 22 is connected to the other end, an orifice of export tee bend 23 is connected to 4 one ends of fourth valve, an orifice of second filter screen tee bend 24 is connected to the other end, inlet flange 31 is connected to the third orifice of inlet tee bend 21, outlet flange 32 is connected to the third orifice of export tee bend 23, first filter screen 5 is connected to the third orifice of first filter screen tee bend 22, second filter screen 6 is connected to the third orifice of second filter screen tee bend 24.
The water inlet pipeline is divided into two, the water outlet pipeline is divided into two, and the first filter screen 5 and the second filter screen 6 respectively realize the filtering operation in two flow directions. Only one flow direction is provided at the same time, and only one filter screen is in a working state. When the first filter screen 5 is communicated with the inlet flange 31, namely when the second valve 2 is opened and the third valve 3 is closed, the first filter screen 5 carries out the filtration operation of the device inlet water, and when the second filter screen 6 is communicated with the inlet flange 31, namely when the first valve 1 is opened and the fourth valve 4 is closed, the second filter screen 6 carries out the filtration operation of the device inlet water.
One point of the differential pressure gauge 25 is located on the line between the inlet flange 31 and the inlet tee 21, and the other point of the differential pressure gauge 25 is located on the line between the outlet flange 32 and the outlet tee 23. The differential pressure gauge measures the pressure difference between the two measuring points to provide parameters for subsequent operation, the pressure difference between the two measuring points represents the resistance condition inside the device, and the larger the internal resistance is, the larger the pressure difference between the two points is. The internal resistance increases as the amount of impurities filtered by the first filter 5 or the second filter 6 increases.
As shown in fig. 2, the first filter three-way 22 and the second filter three-way 24 are reducing three-way, the nominal diameters of branch pipes of the first filter three-way 22 and the second filter three-way 24 are the same as the nominal diameters of other components in the device, the nominal diameters of main pipes of the first filter three-way 22 and the second filter three-way 24 are 1-3 grades greater than the nominal diameters of other components in the device, branch pipes of the first filter three-way 22 and the second filter three-way 24 are horizontally arranged, branch pipes of the first filter three-way 22 vertically arranged in the main pipes are connected with the second valve 2, and branch pipes of the second filter three-way 24 are connected with the first valve 1. The first filter screen tee 22 and the second filter screen tee 24 use a reducing tee with a large belly, and can contain more impurities than a small-caliber equal-diameter tee. The branch pipeline of first filter screen tee bend 22 and second filter screen tee bend 24 is arranged and the branch pipeline of first filter screen tee bend 22 connects second valve 2, and the branch pipeline of second filter screen tee bend 24 connects first valve 1 and can let impurity can not drop to first valve 1 and second valve 2 when discharging for impurity discharge is not abundant.
The first valve 1, the second valve 2, the third valve 3 and the fourth valve 4 have two switch states: a. the first valve 1 and the third valve 3 are opened, and the second valve 2 and the fourth valve 4 are closed; b. the first valve 1 and the third valve 3 are closed, and the second valve 2 and the fourth valve 4 are opened; the opening and closing states of the first valve 1, the second valve 2, the third valve 3 and the fourth valve 4 are interlocked with the differential pressure gauge 25, and when the differential pressure measured by the differential pressure gauge 25 exceeds a set value, the opening and closing states of the first valve 1, the second valve 2, the third valve 3 and the fourth valve 4 are changed.
As shown in fig. 1, two open and close states of the four valves correspond to two flow directions of the device: a. when the first valve 1 and the third valve 3 are opened and the second valve 2 and the fourth valve 4 are closed, the flow direction of the fluid is as follows: inlet flange 31-first valve 1-second filter 6- "service equipment" (heat exchanger, etc.) -first filter 5-third valve 3-outlet flange 32; b. when the first valve 1 and the third valve 3 are closed and the second valve 2 and the fourth valve 4 are opened, the flowing direction of the fluid is as follows: inlet flange 31-second valve 2-first filter 5- "service equipment" (heat exchanger, etc.) -second filter 6-fourth valve 4-outlet flange 32. Such external water-using equipment needs no restriction on the direction of water flow. The set value of the differential pressure gauge 25 is the intermediate value between the contaminant-free pressure difference at the two measuring points when the device is in use and the pressure difference at the full accumulation of contaminants, so that a reversing operation can be performed at about half the accumulation of contaminants, the reversing operation being such as to flush the accumulated contaminants away from the device: when the flow direction is above-mentioned flow direction a, impurity is filtered by second filter 6 and gets off, when the flow direction switches to flow direction b, fluid from reverse flow second filter 6, and the accumulational impurity of second filter 6 is taken away by fluid, and the impurity that flows to first filter 5 in b and filter simultaneously can be taken away by the rivers of flow direction a, so the circulation is reciprocal, and continuous switching-over operation that carries on is with continuous filtration impurity.
When the 'use equipment' has specific requirements on the fluid flow direction, for example, when the device is used as an inlet filtering device of a pump, the inlet and the outlet of the pump cannot be used reversely, so the flow direction of two connecting ports of the device and the pump is not changed, at the moment, two sets of the devices can be combined for use, secondary reversing is carried out, eight valves of the two sets of the devices are interlocked together, the filtering function can be realized, and the flow direction of four external interfaces cannot be changed.
Butterfly valves are used for the first valve 1, the second valve 2, the third valve 3, and the fourth valve 4. The butterfly valve has better flow capacity than on-off valves such as ball valves, and is not easy to leak when dealing with fluids containing impurities.
The diameters of the filter screen holes of the first filter screen 5 and the second filter screen 6 are 0.5-4 mm. Too little sieve mesh diameter filter effect is not good, and too little sieve mesh diameter then flow resistance is too big, can take less value to equipment filter screen mesh diameter that quality of water requirements are high such as heat exchanger for the filterable occasion of pump influent water can take great value.
When the device is used, the inlet flange 31 is connected with external water inlet, the outlet flange 32 is connected with external water outlet, one side of the first filter screen 5 and the second filter screen 6 which are opposite is connected with a water inlet and a water outlet of 'using equipment', external water enters the device from the inlet flange 31, passes through the device and then reaches the 'using equipment', and then returns to the device and leaves from the outlet flange 32 of the device. The impurities in the external inlet water are filtered by the device and do not enter the "user equipment", and the impurities then exit the device along with the outlet water from the outlet flange 32. When the device is used for filtering inlet water of a pump, the device is combined for use, so that the direction of water flow is reversed twice, namely 'internal reversing filtering-constant to the external flowing direction'.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. The utility model provides a mechanical automatic control formula pipeline switching-over device which characterized in that: the mechanical self-control type pipeline reversing device comprises a first valve (1), a second valve (2), a third valve (3), a fourth valve (4), a first filter screen (5), a second filter screen (6), an inlet tee joint (21), a first filter screen tee joint (22), an outlet tee joint (23), a second filter screen tee joint (24), a differential pressure gauge (25), an inlet flange (31) and an outlet flange (32), wherein the inlet flange (31) is an inlet of the device, and the outlet flange (32) is an outlet of the device;
the first valve (1), the second valve (2), the third valve (3), the fourth valve (4), the first filter screen (5), the second filter screen (6), the inlet tee joint (21), the first filter screen tee joint (22), the outlet tee joint (23) and the second filter screen tee joint (24) are connected together through pipelines; one end of the first valve (1) is connected with one pipe orifice of the inlet tee joint (21), the other end of the first valve is connected with one pipe orifice of the second filter screen tee joint (24), one end of the second valve (2) is connected with one pipe orifice of the inlet tee joint (21), the other end of the second valve is connected with one pipe orifice of the first filter screen tee joint (22), one end of the third valve (3) is connected with one pipe orifice of the outlet tee joint (23), the other end of the third valve is connected with one pipe orifice of the first filter screen tee joint (22), one end of the fourth valve (4) is connected with one pipe orifice of the outlet tee joint (23), the other end of the fourth valve is connected with one pipe orifice of the second filter screen tee joint (24), the third pipe orifice of the inlet tee joint (21) is connected with the inlet flange (31), the third pipe orifice of the outlet tee joint (23) is connected with the outlet flange (32), a third pipe orifice of the second filter screen tee joint (24) is connected with a second filter screen (6);
one measuring point of the differential pressure gauge (25) is arranged on a pipeline between the inlet flange (31) and the inlet tee joint (21), and the other measuring point of the differential pressure gauge (25) is arranged on a pipeline between the outlet flange (32) and the outlet tee joint (23);
the first valve (1), the second valve (2), the third valve (3) and the fourth valve (4) have two switch states: a. the first valve (1) and the third valve (3) are opened, and the second valve (2) and the fourth valve (4) are closed; b. the first valve (1) and the third valve (3) are closed, and the second valve (2) and the fourth valve (4) are opened; the on-off states of the first valve (1), the second valve (2), the third valve (3) and the fourth valve (4) are interlocked with a differential pressure gauge (25), and when the pressure difference measured by the differential pressure gauge (25) exceeds a set value, the on-off states of the first valve (1), the second valve (2), the third valve (3) and the fourth valve (4) are exchanged.
2. The mechanical self-control type pipeline reversing device according to claim 1, characterized in that: the filter screen is characterized in that the first filter screen tee joint (22) and the second filter screen tee joint (24) are different-diameter tee joints, nominal diameters of branch pipelines of the first filter screen tee joint (22) and the second filter screen tee joint (24) are the same as nominal diameters of other parts in the device, nominal diameters of main pipelines of the first filter screen tee joint (22) and the second filter screen tee joint (24) are 1-3 grades larger than nominal diameters of other parts in the device, branch pipelines of the first filter screen tee joint (22) and the second filter screen tee joint (24) are horizontally arranged, the main pipelines are vertically arranged, a branch pipeline of the first filter screen tee joint (22) is connected with the second valve (2), and a branch pipeline of the second filter screen tee joint (24) is connected with the first valve (1).
3. The mechanical self-control type pipeline reversing device according to claim 2, characterized in that: the first valve (1), the second valve (2), the third valve (3) and the fourth valve (4) are butterfly valves.
4. The mechanical self-control type pipeline reversing device according to claim 2, characterized in that: the diameters of the filter screen holes of the first filter screen (5) and the second filter screen (6) are 0.5-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320038.1A CN109253393B (en) | 2018-11-07 | 2018-11-07 | Mechanical self-control type pipeline reversing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320038.1A CN109253393B (en) | 2018-11-07 | 2018-11-07 | Mechanical self-control type pipeline reversing device |
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| Publication Number | Publication Date |
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| CN109253393A CN109253393A (en) | 2019-01-22 |
| CN109253393B true CN109253393B (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811320038.1A Active CN109253393B (en) | 2018-11-07 | 2018-11-07 | Mechanical self-control type pipeline reversing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110905857A (en) * | 2019-12-04 | 2020-03-24 | 黄旭平 | Cooling and heat dissipating device for centrifugal pump |
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|---|---|---|---|---|
| US810A (en) * | 1838-06-27 | Amokyamsden | ||
| CN2932029Y (en) * | 2006-06-30 | 2007-08-08 | 上海埃鲁秘工业炉制造有限公司 | Energy-saving constant-pressure oil supply system |
| CN201561075U (en) * | 2009-12-10 | 2010-08-25 | 重庆青山工业有限责任公司 | Cooling control system of dual-clutch gearbox |
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| CN109253393A (en) | 2019-01-22 |
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