CN117704142B - Self-cleaning type flow regulating valve - Google Patents
Self-cleaning type flow regulating valve Download PDFInfo
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- CN117704142B CN117704142B CN202410159988.XA CN202410159988A CN117704142B CN 117704142 B CN117704142 B CN 117704142B CN 202410159988 A CN202410159988 A CN 202410159988A CN 117704142 B CN117704142 B CN 117704142B
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 56
- 238000004140 cleaning Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 186
- 238000011010 flushing procedure Methods 0.000 claims abstract description 152
- 241000555745 Sciuridae Species 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 21
- 230000002159 abnormal effect Effects 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 12
- 239000013049 sediment Substances 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Abstract
The invention relates to the technical field of flow regulating valves, and discloses a self-cleaning flow regulating valve, which comprises: the main valve body is internally provided with a piston connecting rod assembly for adjusting the opening degree, the front side of the piston connecting rod assembly is provided with a squirrel cage, and the front side of the main valve body is provided with a water outlet valve body; one end of the back flushing assembly extends into the water outlet valve body, and the other end of the back flushing assembly is used for taking water from the main valve body or from an external water source and back flushing the squirrel cage and the main valve body; and the control part is used for controlling the work of the back flushing assembly according to the water outlet condition of the main valve body. The backwash assembly can clean the drain hole of the squirrel cage and the blockage at the dead angle of the water outlet of the main valve body, thereby prolonging the service life of the flow regulating valve and reducing the occurrence probability of faults; the intelligent control cabinet can realize the working condition of the remote monitoring control flow regulating valve, so that the labor cost is saved, the back flushing work is timely carried out, and the aim of cleaning the flow regulating valve is fulfilled.
Description
Technical Field
The invention relates to the technical field of flow regulating valves, in particular to a self-cleaning flow regulating valve.
Background
The piston type flow regulating valve controls the opening of the valve according to the forward and backward movement of the piston in the valve body, thereby effectively controlling the flow, the pressure and the like. The flow channel in the flow regulating valve is axisymmetric, when the valve is opened, water flows are collected at the outlet, turbulent flow is not generated when the fluid flows, and cavitation is effectively eliminated; when the flow regulating valve is completely closed, the flow of water is effectively prevented, zero leakage is achieved, and therefore upstream pressure transmission is avoided.
As shown in fig. 1 and 2, the piston type flow regulating valve mainly comprises a main valve body 1, a water outlet valve body 4, a piston connecting rod assembly 2 and an external actuating mechanism 14, wherein the external actuating mechanism controls the piston connecting rod assembly 2 to move back and forth in the main valve body 1 so as to control the opening degree of the valve, and water flow is discharged from the water outlet valve body 4; the piston type flow regulating valve has low running noise and vibration, has accurate linear regulation, energy dissipation and cavitation prevention functions, is convenient to realize automatic control, and is widely applied to various large-scale water delivery engineering projects. In water delivery projects with turbid water quality, especially upstream yellow river, and high sediment and foreign matter concentration, the conditions of foreign matter blockage, sediment accumulation and the like often occur, so that the valve cannot work normally to influence the use. Therefore, there is a need for a self-cleaning type flow regulating valve that at least partially solves the problems of the prior art.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
To at least partially solve the above problems, the present invention provides a self-cleaning type flow regulating valve, comprising: the main valve body is internally provided with a piston connecting rod assembly for adjusting the opening degree, the front side of the piston connecting rod assembly is provided with a squirrel cage, and the front side of the main valve body is provided with a water outlet valve body; one end of the back flushing assembly extends into the water outlet valve body, and the other end of the back flushing assembly is used for taking water from the main valve body or from an external water source and back flushing the squirrel cage and the main valve body; and the control part is used for controlling the work of the back flushing assembly according to the water outlet condition of the main valve body.
Preferably, a first pressure transmitter electrically connected with the control part is arranged on a downstream pipe body connected with the water outlet valve body, and the control part judges the water outlet condition of the main valve body according to the first real-time pressure detected by the first pressure transmitter and the opening degree of the flow regulating valve, and controls the back flushing assembly to work when the water outlet condition of the main valve body is abnormal.
Preferably, the backwash assembly comprises: the annular pipe is arranged in the water outlet valve body and provided with a plurality of nozzles; the water outlet valve body is provided with a connecting pipe in a penetrating way, one end of the connecting pipe is connected with the annular pipe, the other end of the connecting pipe is respectively connected with an external water source pipe and a bypass pipe, and the bypass pipe is communicated with the main valve body; the bypass pipe is provided with a first control valve, and the external water source pipe is provided with a second control valve; the connecting pipe is provided with a pressurizing part.
Preferably, the control part judges the water outlet condition of the main valve body according to the first real-time pressure detected by the first pressure transmitter and the opening degree of the flow regulating valve, and comprises:
Determining the set pressure of a downstream pipe body corresponding to the opening of the flow regulating valve at the current moment when the water outlet condition of the main valve body is normal;
Comparing the first real-time pressure detected by the first pressure transmitter with the set pressure, if the difference between the set pressure and the first real-time pressure is larger than a first preset difference value, judging that the water outlet condition of the main valve body is abnormal, and if the difference between the set pressure and the first real-time pressure is smaller than the first preset difference value, judging that the water outlet condition of the main valve body is normal.
Preferably, when the water outlet condition of the main valve body is abnormal, the control part controls one of the first control valve or the second control valve to be opened, and the water in the main valve body or an external water source is utilized for back flushing;
When back flushing is carried out, the first pressure transmitter feeds back the first real-time pressure of the downstream pipe body to the control part in real time, and the control part judges whether back flushing is stopped or not according to the first real-time pressure when back flushing is carried out.
Preferably, a second pressure transmitter electrically connected with the control part is arranged on an upstream pipe body connected with the main valve body;
when the water outlet condition of the main valve body is abnormal, the control part adjusts the flushing pressure of the back flushing assembly according to the second real-time pressure detected by the second pressure transmitter.
Preferably, the back flushing is carried out in at least two flushing stages;
In the first flushing stage, the flushing pressure meets the condition that the difference value between the flushing pressure and the second real-time pressure is larger than or equal to a first preset flushing pressure difference; in the first flushing stage, if the difference value between the set pressure and the first real-time pressure during back flushing is smaller than a first preset difference value, stopping back flushing without entering the second flushing stage;
At the end time of the first flushing stage, if the difference value between the set pressure and the first real-time pressure is larger than a first preset difference value, the flushing pressure of the back flushing assembly is regulated by the control part, so that the difference value between the flushing pressure and the second real-time pressure is larger than or equal to a second preset flushing pressure difference, and the second flushing stage is started; in the second flushing stage, if the difference value between the set pressure and the first real-time pressure during back flushing is smaller than a first preset difference value, stopping back flushing; in the second flushing stage, if the change amount of the first real-time pressure in the adjacent moment is detected to be smaller than the set change amount, the control part sends out an alarm signal;
wherein the second preset flush differential pressure is greater than the first preset flush differential pressure.
Preferably, when the judging result is that the water outlet condition of the main valve body is abnormal, continuously judging whether the difference value between the set pressure and the first real-time pressure is larger than or equal to a second preset difference value, if so, controlling the second control valve to be opened through the control part, and if not, controlling the first control valve to be opened through the control part;
The second preset difference value is larger than the first preset difference value.
Preferably, the second control valve is in an open state, and in the process of performing back flushing operation by using an external water source, the difference value between the set pressure and the first real-time pressure is monitored in real time by the control part and is smaller than a second preset difference value, if yes, the first control valve is controlled to be opened, the second control valve is closed, and the back flushing operation is continued by using water in the main valve body.
Preferably, the nozzle comprises: the installation cylinder body is connected with the annular pipe, a spray head is arranged in the installation cylinder body, and the outer side of the water inlet end of the spray head is connected with the inside of the installation cylinder body; the outer side of the installation cylinder body is sleeved with a guide cylinder body; the outer side of the spray head and the inner side of the installation cylinder form an annular cavity, and a plurality of water inlet holes communicated with the annular cavity are formed at the joint of the installation cylinder and the spray head; a plugging component is arranged in the annular cavity, and an opening at one side of the guide cylinder body far away from the water inlet end is abutted with the plugging component; when the water pressure driving is not carried out on one side of the plugging component close to the water inlet end, the spray head is plugged, and when the water pressure driving is carried out on one side of the plugging component close to the water inlet end, the plugging of the spray head is released.
Compared with the prior art, the invention at least comprises the following beneficial effects:
The self-cleaning flow regulating valve can clean the drain hole of the squirrel cage and the blockage at the dead angle of the water outlet of the main valve body through the back flushing assembly, so that the service life of the flow regulating valve is prolonged, and the occurrence probability of faults is reduced; the intelligent control cabinet can realize the working condition of the remote monitoring control flow regulating valve, so that the labor cost is saved, the back flushing work is timely carried out, and the aim of cleaning the flow regulating valve is fulfilled.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the internal structure of a prior art flow regulating valve;
FIG. 2 is a schematic diagram of a prior art flow valve linkage coupled to an external actuator;
FIG. 3 is a schematic diagram of a self-cleaning flow regulating valve according to the present invention;
FIG. 4 is a schematic view of the backwash assembly of the self-cleaning diverter valve according to the present invention;
FIG. 5 is a schematic view of a connection structure between a circular pipe and a connecting pipe in the self-cleaning type flow regulating valve according to the present invention;
FIG. 6 is a schematic view of a connection structure between a nozzle and an annular pipe in the self-cleaning type flow regulating valve according to the present invention;
FIG. 7 is a schematic view of a self-cleaning flow control valve according to the present invention in which the nozzle is in a blocked state;
FIG. 8 is a schematic diagram of a block assembly in a self-cleaning flow regulating valve according to the present invention;
fig. 9 is a schematic structural view of the self-cleaning type flow regulating valve according to the present invention when the nozzle is in an open state.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 3, the present invention provides a self-cleaning type flow regulating valve, comprising: the main valve body 1 is internally provided with a piston connecting rod assembly 2 for adjusting the opening degree, the front side of the piston connecting rod assembly 2 is provided with a squirrel cage 3, and the front side of the main valve body 1 is provided with a water outlet valve body 4; a back flushing assembly 5, one end of which extends into the water outlet valve body 4, and the other end of which is used for taking water from the main valve body 1 or from an external water source and back flushing the squirrel cage 3 and the main valve body 1; and the control part controls the back flushing assembly 5 to work according to the water outlet condition of the main valve body 1.
The piston connecting rod assembly 2 comprises a piston 210 and a connecting rod mechanism 220, the connecting rod mechanism 220 is connected with the external actuating mechanism 14, the connecting rod mechanism 220 is controlled to move through the external actuating mechanism 14, and the piston 210 is driven to slide in the main valve body 1 so as to realize the opening adjustment of the flow regulating valve.
The control part can provide stable electric power support for the intelligent control cabinet 15 through the photovoltaic power system and the wind power generation system for the intelligent control cabinet 15, so that the intelligent control cabinet 15 can not work normally due to power failure, and real-time monitoring of the flow regulating valve is ensured; the back flushing function can be started or closed by remotely or on-site controlling the intelligent control cabinet 15;
When water of the main valve body 1 is discharged from the water outlet of the main valve body and filtered by the squirrel cage 3, the water flows to the water outlet valve body 4, a plurality of water holes are formed in the squirrel cage 3, when the upstream foreign matters and silt are accumulated on the water outlet of the main valve body 1 and the water holes of the squirrel cage 3, the downstream water pressure can be reduced, the water outlet condition of the main valve body 1 is abnormal, at the moment, the control part is required to start the back flushing assembly 5, clean water flow is sprayed towards the squirrel cage 3, the clean water flow can form larger impact on the squirrel cage 3, so that water flow disturbance is formed in the main valve body 1, accumulated silt can be dispersed and continuously flow along the water flow through the squirrel cage 3, the foreign matters with smaller size can also flow along the water flow through the squirrel cage 3, the accumulated blocking condition can be relieved, the water holes of the squirrel cage 3 and dead corners in the main valve body 1 can be effectively cleared, the service life of the flow regulating valve is prolonged, and the occurrence probability of the flow regulating valve is reduced.
In one embodiment, a first pressure transmitter electrically connected with a control part is arranged on a downstream pipe body connected with the water outlet valve body 4, and the control part judges the water outlet condition of the main valve body 1 according to the first real-time pressure detected by the first pressure transmitter and the opening degree of the flow regulating valve, and controls the back flushing assembly 5 to work when the water outlet condition of the main valve body 1 is abnormal.
The water outlet condition of the main valve body 1 mainly reflects the downstream water pressure, if the main valve body is blocked, the downstream water pressure is correspondingly reduced, and in addition, under the normal water outlet condition, the water pressure in the downstream pipe body also has a corresponding relation with the opening degree of the flow regulating valve, so that the opening degree of the flow regulating valve and the first real-time pressure of the downstream pipe body are needed to be known to judge the water outlet condition of the main valve body 1, and the work of the backwash assembly 5 is controlled by the control part.
As shown in fig. 3-6, in one embodiment, the backwash assembly 5 includes: an annular pipe 6 provided in the water outlet valve body 4, on which a plurality of nozzles 7 are provided; a connecting pipe 8 is arranged on the water outlet valve body 4 in a penetrating manner, one end of the connecting pipe 8 is connected with the annular pipe 6, the other end of the connecting pipe is respectively connected with an external water source pipe 9 and a bypass pipe 10, and the bypass pipe 10 is communicated with the main valve body 1; the bypass pipe 10 is provided with a first control valve 11, and the external water source pipe 9 is provided with a second control valve 12; the connecting pipe 8 is provided with a pressurizing part 13.
The annular pipe 6 is arranged in the water outlet valve body 4 and is arranged at the inner side of the squirrel cage 3, the nozzle 7 is arranged towards the water outlet of the main valve body 1, and the water outlet of the main valve body 1 is annular, so that a plurality of nozzles 7 are uniformly arranged along the annular pipe 6, and the water outlet of the main valve body 1 can be comprehensively backwashed; the connecting pipe 8 is fixedly connected to the water outlet valve body 4 in a sealing way, the connecting pipe 8 is communicated with the annular pipe 6, the other end of the connecting pipe 8 is respectively connected with the external water source pipe 9 and the bypass pipe 10, the bypass pipe 10 is communicated with the inside of the main valve body 1, the back flushing of water taken from the inside of the main valve body 1 can be realized, and the communication between the main valve body 1 and the connecting pipe 8 is controlled through the first control valve 11; the external water source pipe 9 is communicated with an external water source, so that backwashing can be realized by taking water from the external water source, and the communication between the external water source and the connecting pipe 8 is controlled by the second control valve 12;
In order to improve the backwashing effect, the pressurizing part 13 is arranged on the connecting pipe 8, so that the water flowing in the connecting pipe 8 can be pressurized, and then the water is sprayed out from the nozzle 7 at a high speed and high pressure, so that a better flushing effect is achieved.
Further, the control part judges the water outlet condition of the main valve body 1 according to the first real-time pressure detected by the first pressure transmitter and the opening degree of the flow regulating valve, and comprises:
Determining the set pressure of a downstream pipe body corresponding to the opening of the flow regulating valve at the current moment when the water outlet condition of the main valve body 1 is normal;
Comparing the first real-time pressure detected by the first pressure transmitter with the set pressure, if the difference between the set pressure and the first real-time pressure is larger than a first preset difference, judging that the water outlet condition of the main valve body 1 is abnormal, and if the difference between the set pressure and the first real-time pressure is smaller than the first preset difference, judging that the water outlet condition of the main valve body 1 is normal.
When the water outlet condition of the main valve body 1 is normal, the control part stores the set pressure of the downstream pipe body corresponding to any opening degree of the flow regulating valve, so that the blocking condition, namely the water outlet condition of the main valve body 1, can be obtained only by detecting the first real-time pressure of the downstream pipe body through the first pressure transmitter;
Specifically, the difference value between the set pressure and the first real-time pressure is compared with a first preset difference value, and when the blockage occurs, the first real-time pressure is reduced and is smaller than the set pressure, in order to eliminate the detection error in the actual process, the first preset difference value is set, and if the difference value between the set pressure and the first real-time pressure is larger than the first preset difference value, the judgment result is that the water outlet condition of the main valve body 1 is abnormal, and backwash work is needed; if the difference between the set pressure and the first real-time pressure is smaller than the first preset difference, judging that the water outlet condition of the main valve body 1 is normal, and indicating that the flow regulating valve can work normally.
Further, when the water outlet condition of the main valve body 1 is abnormal, the control part controls one of the first control valve 11 or the second control valve 12 to be opened, and the water or an external water source in the main valve body 1 is used for back flushing;
When back flushing is carried out, the first pressure transmitter feeds back the first real-time pressure of the downstream pipe body to the control part in real time, and the control part judges whether back flushing is stopped or not according to the first real-time pressure when back flushing is carried out.
For the opening conditions of the first control valve 11 and the second control valve 12, further, when the judging result is that the water outlet condition of the main valve body 1 is abnormal, continuously judging whether the difference value between the set pressure and the first real-time pressure is larger than or equal to a second preset difference value, if so, controlling the second control valve 12 to be opened through the control part, and if not, controlling the first control valve 11 to be opened through the control part;
The second preset difference value is larger than the first preset difference value.
The second preset difference value is the condition for judging whether the first control valve 11 or the second control valve 12 is opened, when the water outlet condition is abnormal, if the difference value between the set pressure and the first real-time pressure is larger than or equal to the second preset difference value, the sediment accumulation and blockage are more, if the water is taken from the main valve body 1 for back flushing, the sediment is at risk of entering the bypass pipe 10, the first control valve 11 and the pressurizing part 13 are easy to be blocked and damaged, the nozzle 7 is blocked, the back flushing cannot be performed, and the back flushing assembly 5 is also at risk of being damaged, so that the back flushing effect is better by opening the second control valve 12 through an external water source; if the difference between the set pressure and the first real-time pressure is smaller than the second preset difference, the sediment accumulation and blockage are less, and sediment cannot flow into the bypass pipe 10 when back flushing is performed, so that the first control valve 11 can be opened to perform back flushing by using water in the main valve body 1, the use of an external water source can be saved, the upstream water and the water pressure are fully utilized, the upstream water pressure can be utilized to share the supercharging work of the supercharging part 13, the supercharging effect is ensured, and the purpose of saving energy is achieved.
In order to further save energy, the second control valve 12 is opened, and in the process of performing back flushing operation by using an external water source, the difference between the set pressure and the first real-time pressure is monitored in real time by the control part to be smaller than a second preset difference, if yes, the first control valve 11 is controlled to be opened, the second control valve 12 is closed, and the back flushing operation is continued by using the water in the main valve body 1.
When the external water source is used for back flushing, the control part can monitor whether the difference value between the set pressure and the first real-time pressure is smaller than a second preset difference value in real time, so that when the difference value is smaller than the second preset difference value, the first control valve 11 is opened, the second control valve 12 is closed, the water in the main valve body 1 is used for back flushing continuously, the upstream water pressure is fully utilized, and the use of the external water source is saved.
In one embodiment, a second pressure transmitter electrically connected with the control part is arranged on an upstream pipe body connected with the main valve body 1; the pressure detector electrically connected with the control part is arranged on the water outlet side of the pressurizing part 13 on the connecting pipe 8, and the flushing pressure of the back flushing assembly 5 can be obtained according to the water outlet pressure detected by the pressure detector;
When the water outlet condition of the main valve body 1 is abnormal, the control part adjusts the flushing pressure of the back flushing assembly 5 according to the second real-time pressure detected by the second pressure transmitter.
Since the structures of the connection pipe 8, the annular pipe 6 and the nozzle 7 are not changed, the flushing pressure ejected from the nozzle 7 has a unique correspondence with the outlet water pressure given the outlet water pressure from the water outlet side of the pressurizing part 13;
When back flushing is carried out, the main valve body 1 always keeps a working state, namely water is discharged from the water outlet all the time, and the aim of back flushing cannot be achieved if the flushing pressure of the nozzle 7 is smaller, so that when the water outlet condition of the main valve body 1 is abnormal, the control part adjusts the flushing pressure of the back flushing assembly 5 according to the second real-time pressure detected by the second pressure transmitter, thereby achieving the effective back flushing effect and relieving the blocking condition.
Further, when back flushing is carried out, at least two flushing stages are included;
In the first flushing stage, the flushing pressure meets the condition that the difference value between the flushing pressure and the second real-time pressure is larger than or equal to a first preset flushing pressure difference; in the first flushing stage, if the difference value between the set pressure and the first real-time pressure during back flushing is smaller than a first preset difference value, stopping back flushing without entering the second flushing stage;
At the end time of the first flushing stage, if the difference between the set pressure and the first real-time pressure is larger than a first preset difference, the flushing pressure of the back flushing assembly 5 is regulated by the control part, so that the difference between the flushing pressure and the second real-time pressure is larger than or equal to a second preset flushing pressure difference, and the second flushing stage is started; in the second flushing stage, if the difference value between the set pressure and the first real-time pressure during back flushing is smaller than a first preset difference value, stopping back flushing; in the second flushing stage, if the change amount of the first real-time pressure in the adjacent moment is detected to be smaller than the set change amount, the control part sends out an alarm signal;
wherein the second preset flush differential pressure is greater than the first preset flush differential pressure.
In order to quickly perform back flushing, electric energy is saved, and the back flushing is monitored and regulated in real time so as to acquire a back flushing effect;
Specifically, the back flushing comprises at least two flushing stages, the flushing pressure in the first flushing stage meets a first preset flushing pressure difference, when the first flushing stage does not reach the flushing effect, the second flushing stage is required to be entered, the flushing pressure is lifted to meet a second preset flushing pressure difference, the change amount of the first real-time pressure is required to be monitored in the second flushing stage in real time, whether the back flushing effect has obvious change after the flushing pressure is increased or not is reflected, if the change amount of the first real-time pressure is larger than the set change amount, the increase of the flushing pressure is indicated to be capable of carrying out effective back flushing; if the variation of the first real-time pressure is smaller than the set variation, it indicates that the first real-time pressure is almost unchanged, and the effective back flushing cannot be performed by increasing the flushing pressure, then an alarm signal should be sent by the control part, and serious blockage may occur, for example, a large foreign body is blocked in the main valve body 1, and the main valve body cannot be cleaned by back flushing and needs manual maintenance.
By the mode, the back flushing effect can be monitored in real time, and the flushing pressure can be adjusted in time, so that the back flushing time is shortened as much as possible, the normal operation of the main valve body 1 is ensured, and the use of electric energy of the pressurizing part 13 is reduced; and to the monitoring of back flush effect, can in time learn whether the jam condition is alleviated to in time overhaul the flow regulating valve, prevent to appear more serious result, guarantee the life of flow regulating valve.
As shown in fig. 7-9, in one embodiment, the nozzle 7 comprises: the installation cylinder 710 connected with the annular pipe 6 is internally provided with a spray head 720, and the outer side of the water inlet end of the spray head 720 is connected with the inside of the installation cylinder 710; a guide cylinder 730 is sleeved on the outer side of the installation cylinder 710; an annular cavity 740 is formed between the outer side of the nozzle 720 and the inner side of the installation cylinder 710, and a plurality of water inlet holes 750 communicated with the annular cavity 740 are formed at the joint of the installation cylinder 710 and the nozzle 720; a plugging assembly 760 is arranged in the annular cavity 740, and an opening on one side of the guide cylinder 730, which is far away from the water inlet end, is abutted against the plugging assembly 760; when the side of the plugging assembly 760 close to the water inlet end is not driven by water pressure, the spray head 720 is plugged, and when the side of the plugging assembly 760 close to the water inlet end is driven by water pressure, the spray head 720 is plugged.
When the back flushing assembly 5 does not work, the nozzle 7 faces the water flow, and if the water flow is mixed with fine-particle sediment, the nozzle 7 is easily blocked, so that the back flushing water flow injection is influenced;
Therefore, the nozzle 720 is arranged inside the installation cylinder 710, and when not in use, the nozzle 720 is plugged by the plugging assembly 760, so that sediment is prevented, and when in use, the plugging assembly 760 is opened, and the nozzle 720 is normally used.
The spray head 720 and the installation cylinder 710 can be integrally formed, a water inlet hole 750 is arranged at the joint of the spray head 720 and the installation cylinder 710, one end of the plugging component 760 is elastically and slidably arranged in the annular cavity 740, and the guide cylinder 730 is fixedly connected to the outer side of the installation cylinder 710;
when the hydraulic drive is not performed, the end part of the plugging assembly 760 in the annular cavity 740 is close to the water inlet end of the spray head 720, the other end part is in a plugging state, the spray head 720 is plugged, when the hydraulic drive is performed, the end part of the plugging assembly 760 in the annular cavity 740 moves to the water outlet end far away from the spray head 720, and the other end part is in an opening state, so that the spray head 720 is unblocked.
Further, the plugging assembly 760 includes: an annular driving plate 761 slidably sleeved outside the spray head 720, wherein an elastic piece 762 is connected between the annular driving plate 761 and the guide cylinder 730; a plurality of elastic plates 763 are arranged on one side of the annular driving plate 761 far away from the water inlet end along the circumferential direction, and a plugging plate 764 is arranged on one end of the elastic plates 763 far away from the annular driving plate 761; the elasticity of the elastic member 762 is greater than the elasticity of the elastic plate 763; the connecting plate at the joint of the plugging plate 764 and the elastic plate 763 has no elastic deformation capability, and a plurality of connecting plates are mutually close to form a sealed cylinder shape; a plurality of plugging plates 764 are mutually close to form a sealed plate body;
As shown in fig. 7, when the hydraulic drive is switched to the non-hydraulic drive to seal the nozzle 720, the annular driving plate 761 moves toward the water inlet end under the elastic recovery action of the elastic member 762, the guide cylinder 730 pushes the outer side surface of the elastic plate 763, and finally the guide cylinder 730 abuts against the connecting plate to make the plurality of sealing plates 764 approach each other to seal the nozzle 720;
As shown in fig. 8, when the non-hydraulic driving is switched to the hydraulic driving, and the blocking of the nozzle 720 is released, the hydraulic pressure pushes the annular driving plate 761 to move to a side far away from the water inlet end, the elastic member 762 is compressed, the elastic plate 763 extends out of the guide cylinder 730, and the plurality of blocking plates 764 are mutually far away under the elastic recovery action of the elastic plate 763, so that the blocking of the nozzle 720 is released; in this case, since the volume of the annular chamber 740 is increased, water continuously enters, an annular water outlet gap is formed between the annular driving plate 761 and the nozzle 720, and if the annular water outlet gap is smaller, water entering the annular chamber 740 is ejected from the annular water outlet gap at high pressure, and meanwhile, high-pressure water flow is ejected from the nozzle 720, so that backwash water flow is formed, and the water flow ejection effect is improved;
In addition, the plurality of plugging plates 764 after opening are positioned at the outer side of the ejected water flow, so that a part of water flow discharged from the main valve body 1 can be blocked, the impact force of the water flow discharged from the main valve body 1 on backwash water flow is reduced, the resistance of the water flow ejected from the nozzle 7 is reduced, and the backwash effect is further improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (6)
1. A self-cleaning flow regulating valve, comprising: the device comprises a main valve body (1), wherein a piston connecting rod assembly (2) for adjusting the opening degree is arranged in the main valve body, a squirrel cage (3) is arranged at the front side of the piston connecting rod assembly (2), and a water outlet valve body (4) is arranged at the front side of the main valve body (1); one end of the back flushing assembly (5) extends into the water outlet valve body (4), and the other end of the back flushing assembly is used for taking water from the main valve body (1) or from an external water source and back flushing the squirrel cage (3) and the main valve body (1); the control part controls the back flushing assembly (5) to work according to the water outlet condition of the main valve body (1);
a first pressure transmitter electrically connected with a control part is arranged on a downstream pipe body connected with the water outlet valve body (4), the control part judges the water outlet condition of the main valve body (1) according to the first real-time pressure detected by the first pressure transmitter and the opening degree of the flow regulating valve, and when the water outlet condition of the main valve body (1) is abnormal, the back flushing assembly (5) is controlled to work;
The backwash assembly (5) comprises: an annular pipe (6) arranged in the water outlet valve body (4) and provided with a plurality of nozzles (7); a connecting pipe (8) is arranged on the water outlet valve body (4) in a penetrating manner, one end of the connecting pipe (8) is connected with the annular pipe (6), the other end of the connecting pipe is respectively connected with an external water source pipe (9) and a bypass pipe (10), and the bypass pipe (10) is communicated with the main valve body (1); the bypass pipe (10) is provided with a first control valve (11), and the external water source pipe (9) is provided with a second control valve (12); the connecting pipe (8) is provided with a pressurizing part (13);
the control part judges the water outlet condition of the main valve body (1) according to the first real-time pressure detected by the first pressure transmitter and the opening degree of the flow regulating valve, and comprises the following steps:
determining the set pressure of a downstream pipe body corresponding to the opening of the flow regulating valve at the current moment when the water outlet condition of the main valve body (1) is normal;
comparing the first real-time pressure detected by the first pressure transmitter with a set pressure, if the difference between the set pressure and the first real-time pressure is larger than a first preset difference, judging that the water outlet condition of the main valve body (1) is abnormal, and if the difference between the set pressure and the first real-time pressure is smaller than the first preset difference, judging that the water outlet condition of the main valve body (1) is normal;
The upstream pipe body connected with the main valve body (1) is provided with a second pressure transmitter electrically connected with the control part;
when the water outlet condition of the main valve body (1) is abnormal, the control part adjusts the flushing pressure of the back flushing assembly (5) according to the second real-time pressure detected by the second pressure transmitter.
2. The self-cleaning type flow regulating valve according to claim 1, wherein when the water outlet condition of the main valve body (1) is abnormal, the control part controls one of the first control valve (11) or the second control valve (12) to be opened, and the back flushing operation is performed by using water or an external water source in the main valve body (1);
When back flushing is carried out, the first pressure transmitter feeds back the first real-time pressure of the downstream pipe body to the control part in real time, and the control part judges whether back flushing is stopped or not according to the first real-time pressure when back flushing is carried out.
3. The self-cleaning flow regulating valve of claim 2, wherein the back flushing is performed in at least two flushing stages;
In the first flushing stage, the flushing pressure meets the condition that the difference value between the flushing pressure and the second real-time pressure is larger than or equal to a first preset flushing pressure difference; in the first flushing stage, if the difference value between the set pressure and the first real-time pressure during back flushing is smaller than a first preset difference value, stopping back flushing without entering the second flushing stage;
At the end time of the first flushing stage, if the difference value between the set pressure and the first real-time pressure is larger than a first preset difference value, the flushing pressure of the back flushing assembly (5) is regulated by the control part, so that the difference value between the flushing pressure and the second real-time pressure is larger than or equal to a second preset flushing pressure difference, and the second flushing stage is started; in the second flushing stage, if the difference value between the set pressure and the first real-time pressure during back flushing is smaller than a first preset difference value, stopping back flushing; in the second flushing stage, if the change amount of the first real-time pressure in the adjacent moment is detected to be smaller than the set change amount, the control part sends out an alarm signal;
wherein the second preset flush differential pressure is greater than the first preset flush differential pressure.
4. The self-cleaning type flow regulating valve according to claim 2, wherein when the judging result is that the water outlet condition of the main valve body (1) is abnormal, whether the difference value between the set pressure and the first real-time pressure is larger than or equal to a second preset difference value is continuously judged, if so, the second control valve (12) is controlled to be opened by the control part, and if not, the first control valve (11) is controlled to be opened by the control part;
The second preset difference value is larger than the first preset difference value.
5. The self-cleaning type flow regulating valve according to claim 4, wherein the second control valve (12) is opened, and in the process of performing back flushing operation by using an external water source, whether the difference between the set pressure and the first real-time pressure is smaller than a second preset difference is monitored in real time by the control part, if yes, the first control valve (11) is controlled to be opened, and the second control valve (12) is closed, and the back flushing operation is continued by using the water in the main valve body (1).
6. Self-cleaning flow regulating valve according to claim 1, characterized in that the nozzle (7) comprises: the installation cylinder (710) is connected with the annular pipe (6), a spray head (720) is arranged in the installation cylinder, and the outer side of the water inlet end of the spray head (720) is connected with the inside of the installation cylinder (710); a guide cylinder (730) is sleeved on the outer side of the installation cylinder (710); an annular cavity (740) is formed between the outer side of the spray head (720) and the inner side of the installation cylinder (710), and a plurality of water inlet holes (750) communicated with the annular cavity (740) are formed at the joint of the installation cylinder (710) and the spray head (720); a plugging component (760) is arranged in the annular cavity (740), and an opening at one side of the guide cylinder (730) far away from the water inlet end is abutted against the plugging component (760); when the side of the plugging component (760) close to the water inlet end is not driven by water pressure, the spray head (720) is plugged, and when the side of the plugging component (760) close to the water inlet end is driven by water pressure, the spray head (720) is plugged.
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| CN202410159988.XA CN117704142B (en) | 2024-02-05 | 2024-02-05 | Self-cleaning type flow regulating valve |
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| CN202410159988.XA CN117704142B (en) | 2024-02-05 | 2024-02-05 | Self-cleaning type flow regulating valve |
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| CN117704142B true CN117704142B (en) | 2024-05-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202852182U (en) * | 2012-08-02 | 2013-04-03 | 中阀科技(长沙)阀门有限公司 | Mesh sleeve type regulating valve |
| CN206309956U (en) * | 2016-12-26 | 2017-07-07 | 福建高中压阀门科技有限公司 | Direct-current piston type current-regulating voltage-regulating with filtering controls valve |
| CN111503301A (en) * | 2020-05-26 | 2020-08-07 | 上海冠龙阀门自控有限公司 | Sleeve type control valve |
| CN115875508A (en) * | 2022-12-30 | 2023-03-31 | 安徽红星阀门有限公司 | On-line maintenance flow and pressure regulating valve bank |
-
2024
- 2024-02-05 CN CN202410159988.XA patent/CN117704142B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202852182U (en) * | 2012-08-02 | 2013-04-03 | 中阀科技(长沙)阀门有限公司 | Mesh sleeve type regulating valve |
| CN206309956U (en) * | 2016-12-26 | 2017-07-07 | 福建高中压阀门科技有限公司 | Direct-current piston type current-regulating voltage-regulating with filtering controls valve |
| CN111503301A (en) * | 2020-05-26 | 2020-08-07 | 上海冠龙阀门自控有限公司 | Sleeve type control valve |
| CN115875508A (en) * | 2022-12-30 | 2023-03-31 | 安徽红星阀门有限公司 | On-line maintenance flow and pressure regulating valve bank |
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| CN117704142A (en) | 2024-03-15 |
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