An automatic backwash device and system

Abstract

The embodiment of the application provides an automatic backwashing device and system, and relates to the technical field of cooling and heat exchange. The first pipe opening of a first three-way ball valve is connected with a cooling water inlet pipeline; the first pipe opening of a second three-way ball valve is connected with the cooling water inlet pipeline; the cooling water inlet pipeline is used for injecting cooling water into the first three-way ball valve or the second three-way ball valve; the second pipe opening of the first three-way ball valve is connected with the first pipe opening of a water cooler; the second pipe opening of the second three-way ball valve is connected with the second pipe opening of the water cooler; the third pipe opening of the first three-way ball valve is connected with a cooling water storage device; the third pipe opening of the second three-way ball valve is connected with the cooling water storage device; the third pipe opening of the water cooler is connected with an oil outlet pipe opening of a hydraulic device; and the fourth pipe opening of the water cooler is connected with an oil inlet pipe opening of the hydraulic device. The technical problem of increasing equipment maintenance cost and long-time equipment interruption caused by the existing technology for water cooler blockage treatment is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling heat exchange, in particular to an automatic backwashing device and system. BACKGROUND

[0002] In field operations, the working requirements of hydraulic drive equipment often involve high-power hydraulic systems. In order to ensure the stable operation of these devices, it is necessary to rely on high-power water coolers to effectively cool the hydraulic system. In this process, the water cooler plays a crucial role, responsible for conducting the heat of the hydraulic oil to the water and removing the heat through circulating water flow, thereby maintaining the temperature of the hydraulic system within the normal working range.

[0003] At present, when the water cooler is blocked, if the blockage is relatively light, the reverse flushing method of on-site replacement of the water inlet pipe and the water outlet pipe is generally used to clean the blockage. In order to ensure that the water flow in the water cooler can be backwashed and dredge the pipeline, the water supply equipment and the hydraulic equipment need to be cut off and the water cooler needs to be suspended; if the blockage is relatively serious, complex oxalic acid soaking treatment needs to be carried out, and then the blockage is softened and then flushed. In order to ensure that the oxalic acid can fully play a role and that the oxalic acid cleaning process can be carried out smoothly, the oxalic acid needs to be soaked for a period of time and the water supply equipment, the hydraulic equipment and the water cooler need to be cut off.

[0004] In summary, the above treatment methods for water cooler blockage not only need to cut off the water supply equipment, the hydraulic equipment and the water cooler, but also need to spend a lot of time for oxalic acid soaking when the blockage is relatively serious. Therefore, the existing treatment method not only increases the equipment maintenance cost, but also causes a long time of equipment interruption, thereby affecting the overall operation progress and efficiency. SUMMARY

[0005] The embodiments of the present application provide an automatic backwashing device and system to solve the technical problems of increasing equipment maintenance cost and long time equipment interruption caused by using the prior art to process water cooler blockage.

[0006] In a first aspect, the embodiments of the present application provide an automatic backwashing device, comprising:

[0007] a water cooler water inlet pipeline, a water cooler water outlet pipeline, a water cooler, a water cooler hydraulic oil inlet pipeline, a water cooler hydraulic oil outlet pipeline, a first cooling water inlet branch, a second cooling water inlet branch, a first cooling water outlet branch, a second cooling water outlet branch, a first three-way ball valve, a second three-way ball valve and a cooling water inlet pipeline;

[0008] The first pipe opening of the first three-way ball valve is connected with the cooling water inlet pipeline through the first cooling water inlet branch; the first pipe opening of the second three-way ball valve is connected with the cooling water inlet pipeline through the second cooling water inlet branch; the cooling water inlet pipeline is used for injecting cooling water into the first three-way ball valve or the second three-way ball valve;

[0009] The second pipe opening of the first three-way ball valve is connected with the first pipe opening of the water cooler through the water cooler outlet pipeline; the second pipe opening of the second three-way ball valve is connected with the second pipe opening of the water cooler through the water cooler inlet pipeline;

[0010] The third pipe opening of the first three-way ball valve is connected with the cooling water storage device through the first cooling water outlet branch; the third pipe opening of the second three-way ball valve is connected with the cooling water storage device through the second cooling water outlet branch;

[0011] The third pipe opening of the water cooler is connected with the oil outlet pipe opening of the hydraulic device through the water cooler hydraulic oil inlet pipeline; the fourth pipe opening of the water cooler is connected with the oil inlet pipe opening of the hydraulic device through the water cooler hydraulic oil outlet pipeline.

[0012] In a possible implementation, when the first three-way ball valve is placed in a preset first position and the second three-way ball valve is placed in a preset second position, the second pipe opening of the first three-way ball valve is in communication with the third pipe opening of the first three-way ball valve, and the first pipe opening of the second three-way ball valve is in communication with the second pipe opening of the second three-way ball valve;

[0013] When the first three-way ball valve is placed in a preset third position and the second three-way ball valve is placed in a preset fourth position, the first pipe opening of the first three-way ball valve is in communication with the second pipe opening of the first three-way ball valve, and the second pipe opening of the second three-way ball valve is in communication with the third pipe opening of the second three-way ball valve.

[0014] In a possible implementation, the device further comprises a controller;

[0015] The first three-way ball valve comprises a first three-way ball valve body and a first actuator, and the second three-way ball valve comprises a second three-way ball valve body and a second actuator;

[0016] The first pipe opening of the first three-way ball valve body is connected with the cooling water inlet pipeline through the first cooling water inlet branch; the second pipe opening of the first three-way ball valve body is connected with the first pipe opening of the water cooler through the water cooler outlet pipeline; and the third pipe opening of the first three-way ball valve body is connected with the cooling water storage device through the first cooling water outlet branch;

[0017] The first pipe orifice of the second three-way ball valve body is connected with the cooling water inlet pipeline through the second cooling water inlet branch; the second pipe orifice of the second three-way ball valve body is connected with the second pipe orifice of the water cooler through the water cooler water inlet pipeline; and the third pipe orifice of the second three-way ball valve body is connected with the cooling water storage device through the second cooling water outlet branch;

[0018] The controller is configured to periodically control the first actuator and the second actuator, so that the first actuator periodically places the first three-way ball valve body in the first position or the third position, and the second actuator periodically places the second three-way ball valve body in the second position or the fourth position.

[0019] In a possible implementation, the system further comprises a first pressure sensor, a second pressure sensor, and a cooling water outlet pipeline;

[0020] The first cooling water outlet branch and the second cooling water outlet branch are both connected with the cooling water storage device through the cooling water outlet pipeline.

[0021] The first pressure sensor is installed on the cooling water inlet pipeline, and is configured to detect a first pressure of the cooling water inlet pipeline; and the second pressure sensor is installed on the cooling water outlet pipeline, and is configured to detect a second pressure of the cooling water outlet pipeline.

[0022] The controller is configured to obtain a control frequency according to a numerical relationship between the first pressure and the second pressure, and periodically control the first actuator and the second actuator according to the control frequency.

[0023] In a possible implementation, the control frequency is positively correlated with a difference between the first pressure and the second pressure.

[0024] In a possible implementation, the system further comprises a blowdown pipeline;

[0025] The blowdown pipeline comprises a blowdown branch and a blowdown valve.

[0026] The third pipe orifice of the second three-way ball valve body is connected with the sewage storage device through the second cooling water outlet branch and the blowdown branch.

[0027] The blowdown valve is installed on the blowdown branch.

[0028] When the difference between the first pressure and the second pressure is greater than a preset difference threshold, the controller is configured to control the blowdown valve to be opened; otherwise, the controller is configured to control the blowdown valve to be closed.

[0029] In a possible implementation, the temperature sensor is further included;

[0030] The temperature sensor is installed on the hydraulic oil outlet pipeline of the water cooler, and is used to detect the working temperature of the hydraulic oil; and the frequency control value is positively correlated with the working temperature.

[0031] In a possible implementation, the cooling water storage device is specifically used to inject the cooling water obtained through the cooling water storage device into the first three-way ball valve or the second three-way ball valve.

[0032] In a second aspect, the embodiments of the present application provide an automatic backwashing system, comprising:

[0033] The cooling water storage device, the hydraulic device, and the automatic backwashing device provided in the first aspect of the embodiments of the present application.

[0034] In a possible implementation, the cooling water storage device is provided with a cooling mechanism, so that the liquid in the cooling water storage device is cooled and the cooling water is obtained through the cooling mechanism.

[0035] The automatic backflushing device and system provided by the embodiment of the application comprises: a water cooler water inlet pipeline, a water cooler water outlet pipeline, a water cooler, a water cooler hydraulic oil inlet pipeline, a water cooler hydraulic oil outlet pipeline, a first cooling water inlet branch pipeline, a second cooling water inlet branch pipeline, a first cooling water outlet branch pipeline, a second cooling water outlet branch pipeline, a first three-way ball valve, a second three-way ball valve and a cooling water inlet pipeline; the first pipe opening of the first three-way ball valve is connected with the cooling water inlet pipeline through the first cooling water inlet branch pipeline; the first pipe opening of the second three-way ball valve is connected with the cooling water inlet pipeline through the second cooling water inlet branch pipeline; the cooling water inlet pipeline is used for injecting cooling water into the first three-way ball valve or the second three-way ball valve; the second pipe opening of the first three-way ball valve is connected with the first pipe opening of the water cooler through the water cooler water outlet pipeline; the second pipe opening of the second three-way ball valve is connected with the second pipe opening of the water cooler through the water cooler water inlet pipeline; the third pipe opening of the first three-way ball valve is connected with a cooling water storage device through the first cooling water outlet branch pipeline; the third pipe opening of the second three-way ball valve is connected with the cooling water storage device through the second cooling water outlet branch pipeline; the third pipe opening of the water cooler is connected with the oil outlet pipe opening of a hydraulic device through the water cooler hydraulic oil inlet pipeline; and the fourth pipe opening of the water cooler is connected with the oil inlet pipe opening of the hydraulic device through the water cooler hydraulic oil outlet pipeline. Through the above structural design, the following technical effects are achieved: through left and right position switching of the first three-way ball valve and the second three-way ball valve, water inlet and water outlet of the water cooler are reversed, the purpose of backflushing the water cooler is achieved, the cooling function of the water cooler is not affected during the backflushing process, the equipment maintenance cost can be effectively reduced, and long-time interruption of the equipment can be avoided; the third pipe opening of the water cooler is the pipe opening connected with the water cooler hydraulic oil inlet pipeline, and functions in that hydraulic oil in the hydraulic device is delivered to the water cooler and is effectively cooled; and the fourth pipe opening of the water cooler is the pipe opening connected with the water cooler hydraulic oil outlet pipeline, and functions in that the hydraulic oil that is effectively cooled is delivered to the hydraulic device, so that the hydraulic device can work normally. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0037] The drawings herein are incorporated into the specification and form part of the specification, show embodiments consistent with the application, and together with the specification serve to explain the principles of the application.

[0038] Figure 1 The schematic diagram of the automatic backflushing device provided by the embodiment of the application.

[0039] Reference Signs List:

[0040] 100 - first three-way ball valve; 110 - first actuator; 120 - first three-way ball valve body; 200 - second three-way ball valve; 210 - second three-way ball valve body; 220 - second actuator; 310 - water cooler water outlet pipeline; 320 - water cooler hydraulic oil outlet pipeline; 330 - water cooler; 340 - water cooler hydraulic oil inlet pipeline; 350 - water cooler water inlet pipeline; 410 - first cooling water inlet branch; 420 - second cooling water inlet branch; 510 - second cooling water outlet branch; 520 - first cooling water outlet branch; 600 - cooling water outlet pipeline; 700 - cooling water inlet pipeline; 800 - blowdown pipeline; 810 - blowdown branch; 820 - blowdown valve; 900 - controller.

[0041] The specific embodiments of the present application have been shown and described in the above-described drawings and specification, and it is to be understood that the application is not limited to the embodiments described, since modifications will occur to those skilled in the art upon reading the description of the application. Accordingly, all modifications and equivalents cannot possibly be built up against the application and the same are intended to fall within the scope of the application. DETAILED DESCRIPTION

[0042] The exemplary embodiments will be described in detail herein below with reference to the drawings. In the following description, unless otherwise indicated, like numbers in the figures indicate like components. The following detailed description of the exemplary embodiments is not intended to limit the scope of the application, as claimed, but rather the description is intended to explain the concepts underlying the application in order to enable others skilled in the art to best utilize the application. The following detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary embodiments. However, it will be apparent to those skilled in the art that the exemplary embodiments described herein can be practiced without these specific details.

[0043] In the embodiments of the present application, the terms "first", "second", and the like are used to distinguish between similar or identical items or components having substantially the same function and purpose. Those skilled in the art will understand that the terms "first", "second", and the like do not limit the number and execution order, and the terms "first", "second", and the like do not necessarily mean different. It should be noted that the terms "exemplary" or "for example" in the embodiments of the present application are used to indicate an example, illustration, or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the terms "exemplary" or "for example" are used in the embodiments of the present application to present the relevant concept in a specific manner. In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more.

[0044] It should be noted that the "at" in the embodiments of the present application can be the moment when a certain condition occurs, or a period of time after a certain condition occurs, and the embodiments of the present application do not make specific limitations. In addition, the automatic backflushing device provided by the embodiments of the present application is only an example, and the automatic backflushing device can also include more or less content.

[0045] First, the terms involved in the present application are explained:

[0046] Water cooler: A device that absorbs, transfers or dissipates heat through the flow of water to reduce the temperature of a device or system. Water coolers are widely used in various industries, machinery, electronic equipment, especially in situations that require large-scale heat dissipation, such as engines, hydraulic systems, air conditioning equipment and computer servers. The basic working principle of the water cooler is to use the characteristics of water that can absorb a large amount of heat with a small change in temperature to remove heat from the device or system, so that the temperature of the device or system is maintained within a reasonable range.

[0047] In order to clearly understand the technical solutions of the embodiments of the present application, the solutions of the prior art are first introduced in detail.

[0048] There are two ways to handle the clogging of the water cooler in the prior art. One is that the clogging is relatively light, and the reverse flushing method of replacing the water inlet pipe and the water outlet pipe on site is generally used to clean the clogging. At this time, the water supply equipment, hydraulic equipment and water cooler need to be cut off. The other is that the clogging is relatively serious, and a complex oxalic acid soaking treatment needs to be carried out. After the clogging is softened, it needs to be flushed. In order to ensure that the oxalic acid can fully play a role and the oxalic acid cleaning process can be carried out smoothly, the oxalic acid needs to be soaked for a period of time and the water supply equipment, hydraulic equipment and water cooler need to be cut off.

[0049] When using the above technology to treat the clogging, the water supply equipment, hydraulic equipment and water cooler need to be temporarily cut off, so that the equipment needs to be shut down for maintenance, affecting the work efficiency and progress.

[0050] In summary, how to design a device that can perform reverse flushing without affecting the cooling function of the water cooler during the backflushing process is a problem that needs to be solved by the embodiments of the present application.

[0051] Therefore, in view of the above technical problems existing in the prior art, the embodiments of the present application provide an automatic backflushing device and system, which can be used in the technical field of cooling and heat exchange, and aims to ensure that the cooling function of the water cooler is not affected during the backflushing process, so as to meet the requirement of heat exchange.

[0052] The application provides an application scenario of the automatic backwashing device and system. The following application scenario is only an example, and is intended to help those skilled in the art understand the technical content of the application, but does not mean that the application cannot be used in other devices, systems, environments or scenarios.

[0053] 1) Industrial cooling system: In the power industry and chemical industry, water coolers are often needed to control the temperature of equipment. If impurities in the cooling water deposit on the surface of the cooling pipeline or heat exchanger, the cooling efficiency will be reduced, and even the system will fail. The automatic backwashing device designed in the application can periodically remove these deposits without affecting the normal operation of the equipment.

[0054] 2) Seawater cooling system: Seawater contains a large amount of salt, plankton and other impurities, which may cause seaweed, shells and other substances to cover the pipeline and heat exchanger of the cooling system. In order to prevent these deposits from affecting the cooling efficiency, backwashing is needed. Especially in power plants, seawater desalination plants and offshore oil platforms near the coast that use seawater for cooling, the backwashing device does not affect the normal operation of the equipment, which is the key to maintaining the normal operation of the system.

[0055] 3) Electroplating and metal processing industry: In the field of electroplating and metal processing, the wastewater generated in these processes may contain metal ions, chemicals and particles, so the cooling water needs to maintain a high degree of cleanliness, otherwise the deposits in the cooling system will easily block the pipeline and reduce the heat exchange efficiency. The automatic backwashing device designed in the application can periodically clean the impurities inside the cooler, maintaining the normal operation of the cooling water system.

[0056] The application is described below with reference to the accompanying drawings.

[0057] Figure 1 The automatic backwashing device provided by the application is shown in the schematic diagram. As shown in Figure 1 The application provides an automatic backwashing device, which comprises:

[0058] The water cooler water inlet pipeline 350, the water cooler water outlet pipeline 310, the water cooler 330, the water cooler hydraulic oil inlet pipeline 340, the water cooler hydraulic oil outlet pipeline 320, the first cooling water inlet branch 410, the second cooling water inlet branch 420, the first cooling water outlet branch 520, the second cooling water outlet branch 510, the first three-way ball valve 100, the second three-way ball valve 200 and the cooling water inlet pipeline 700.

[0059] Specifically, in the embodiment, the first three-way ball valve 100 and the second three-way ball valve 200 adopt L-shaped three-way ball valves, and in addition, pneumatic three-way ball valves and electric three-way ball valves can also be adopted, and the type of the three-way ball valve is not specifically limited here.

[0060] The first pipe port of the first three-way ball valve 100 is connected with the cooling water inlet pipe 700 through the first cooling water inlet branch 410, and the first pipe port of the second three-way ball valve 200 is connected with the cooling water inlet pipe 700 through the second cooling water inlet branch 420.

[0061] Specifically, in the embodiment, the cooling water inlet pipe 700 is used to inject cooling water to the first three-way ball valve 100 or the second three-way ball valve 200. The first three-way ball valve 100 and the second three-way ball valve 200 each have one inlet P and two outlets A and B, and the cooling water is a pressure water source injected into the water cooler 330 through the cooling water inlet pipe 700.

[0062] When the three-way ball valve is in the left position, the first three-way ball valve 100 and the second three-way ball valve 200 each have the P port disconnected with the A port and connected with the B port. The pressure water source enters from the cooling water inlet pipe 700 and then enters the B port of the first three-way ball valve 100 through the first cooling water inlet branch 410, that is, the cooling water inlet pipe 700 is used to inject the pressure water source to the first three-way ball valve 100, and at this time, the B port of the first three-way ball valve 100 is the first pipe port of the first three-way ball valve 100.

[0063] When the three-way ball valve is in the right position, the first three-way ball valve 100 and the second three-way ball valve 200 each have the P port connected with the A port and disconnected with the B port. The pressure water source enters from the cooling water inlet pipe 700 and then enters the A port of the second three-way ball valve 200 through the second cooling water inlet branch 420, that is, the cooling water inlet pipe 700 is used to inject the pressure water source to the second three-way ball valve 200, and at this time, the A port of the second three-way ball valve 200 is the first pipe port of the second three-way ball valve 200.

[0064] The second pipe port of the first three-way ball valve 100 is connected with the first pipe port of the water cooler 330 through the water cooler outlet pipe 310, and the second pipe port of the second three-way ball valve 200 is connected with the second pipe port of the water cooler 330 through the water cooler inlet pipe 350.

[0065] Specifically, in the embodiment, the cooling water flows from the water cooler inlet pipe 350 to the water cooler outlet pipe 310, or from the water cooler outlet pipe 310 to the water cooler inlet pipe 350.

[0066] The second pipe opening of the first three-way ball valve 100 is connected with the first pipe opening of the water cooler 330 through the water cooler outlet water pipeline 310, that is, the second pipe opening of the first three-way ball valve 100 is the P opening of the first three-way ball valve 100, and the first pipe opening of the water cooler 330 is the pipe opening connected with the water cooler outlet water pipeline 310; the second pipe opening of the second three-way ball valve 200 is connected with the second pipe opening of the water cooler 330 through the water cooler inlet water pipeline 350, that is, the second pipe opening of the second three-way ball valve 200 is the P opening of the second three-way ball valve 200, and the second pipe opening of the water cooler 330 is the pipe opening connected with the water cooler inlet water pipeline 350.

[0067] When the three-way ball valve is in the left position, the cooling water flows from the water cooler outlet water pipeline 310 to the water cooler inlet water pipeline 350, and at this time, the water flow in the water cooler 330 is countercurrent; when the three-way ball valve is in the right position, the cooling water flows from the water cooler inlet water pipeline 350 to the water cooler outlet water pipeline 310, and at this time, the water flow in the water cooler 330 is direct current.

[0068] The third pipe opening of the first three-way ball valve 100 is connected with the cooling water storage device through the first cooling outlet water branch pipeline 520; and the third pipe opening of the second three-way ball valve 200 is connected with the cooling water storage device through the second cooling outlet water branch pipeline 510.

[0069] Specifically, in the embodiment, when the three-way ball valve is in the left position, the third pipe opening of the second three-way ball valve 200 is connected with the cooling water storage device through the second cooling outlet water branch pipeline 510, and at this time, the third pipe opening of the second three-way ball valve 200 is the B opening of the second three-way ball valve 200. When the three-way ball valve is in the left position, the flow direction of the cooling water is: the cooling inlet water pipeline 700-the first cooling inlet water branch pipeline 410-the B opening of the first three-way ball valve 100-the P opening of the first three-way ball valve 100-the first pipe opening of the water cooler 330-the second pipe opening of the water cooler 330-the P opening of the second three-way ball valve 200-the B opening of the second three-way ball valve 200, and finally reaches the second cooling outlet water branch pipeline 510.

[0070] When the three-way ball valve is in the right position, the third pipe opening of the first three-way ball valve 100 is connected with the cooling water storage device through the first cooling outlet water branch pipeline 520, and at this time, the third pipe opening of the first three-way ball valve 100 is the A opening of the first three-way ball valve 100. When the three-way ball valve is in the right position, the flow direction of the cooling water is: the cooling inlet water pipeline 700-the second cooling inlet water branch pipeline 420-the A opening of the second three-way ball valve 200-the P opening of the second three-way ball valve 200-the second pipe opening of the water cooler 330-the first pipe opening of the water cooler 330-the P opening of the first three-way ball valve 100-the A opening of the first three-way ball valve 100, and finally reaches the first cooling outlet water branch pipeline 520.

[0071] By switching the left and right positions of the first and second three-way ball valves, the water inlet and outlet of the water cooler are reversed, the purpose of reverse flushing of the water cooler is achieved, the cooling function of the water cooler is not affected during the backwashing process, the equipment maintenance cost can be effectively reduced, and long-term interruption of the equipment can be avoided.

[0072] The third port of the water cooler 330 is connected with the oil outlet port of the hydraulic device through the water cooler hydraulic oil inlet pipeline 340, and the fourth port of the water cooler 330 is connected with the oil inlet port of the hydraulic device through the water cooler hydraulic oil outlet pipeline 320.

[0073] Specifically, in the embodiment, the water cooler 330 is used to cool the hydraulic oil of the hydraulic device by cooling water.

[0074] The third port of the water cooler 330 is connected with the oil outlet port of the hydraulic device through the water cooler hydraulic oil inlet pipeline 340, that is, the third port of the water cooler 330 is the port connected with the water cooler hydraulic oil inlet pipeline 340, which functions to deliver the hydraulic oil in the hydraulic device to the water cooler and effectively cool it; the fourth port of the water cooler 330 is connected with the oil inlet port of the hydraulic device through the water cooler hydraulic oil outlet pipeline 320, that is, the fourth port of the water cooler 330 is the port connected with the water cooler hydraulic oil outlet pipeline 320, which functions to deliver the effectively cooled hydraulic oil to the hydraulic device so that the hydraulic device can work normally.

[0075] The automatic backflushing device provided by the embodiment of the application comprises: a water cooler water inlet pipeline, a water cooler water outlet pipeline, a water cooler, a water cooler hydraulic oil inlet pipeline, a water cooler hydraulic oil outlet pipeline, a first cooling water inlet branch pipeline, a second cooling water inlet branch pipeline, a first cooling water outlet branch pipeline, a second cooling water outlet branch pipeline, a first three-way ball valve, a second three-way ball valve and a cooling water inlet pipeline; the first port of the first three-way ball valve is connected with the cooling water inlet pipeline through the first cooling water inlet branch pipeline; the first port of the second three-way ball valve is connected with the cooling water inlet pipeline through the second cooling water inlet branch pipeline; the cooling water inlet pipeline is used for injecting cooling water into the first three-way ball valve or the second three-way ball valve; the second port of the first three-way ball valve is connected with the first port of the water cooler through the water cooler water outlet pipeline; the second port of the second three-way ball valve is connected with the second port of the water cooler through the water cooler water inlet pipeline; the third port of the first three-way ball valve is connected with a cooling water storage device through the first cooling water outlet branch pipeline; the third port of the second three-way ball valve is connected with the cooling water storage device through the second cooling water outlet branch pipeline; the third port of the water cooler is connected with the oil outlet port of a hydraulic device through the water cooler hydraulic oil inlet pipeline; and the fourth port of the water cooler is connected with the oil inlet port of the hydraulic device through the water cooler hydraulic oil outlet pipeline. Through the above structural design, the following technical effects are achieved: through the left and right position switching of the first three-way ball valve and the second three-way ball valve, the water inlet and water outlet of the water cooler are reversed, the purpose of backflushing the water cooler is achieved, the cooling function of the water cooler is not affected during the backflushing process, the equipment maintenance cost can be effectively reduced, and long-time equipment interruption can be avoided; the third port of the water cooler is the port connected with the water cooler hydraulic oil inlet pipeline, and functions in conveying the hydraulic oil in the hydraulic device to the water cooler and effectively cooling the water cooler; and the fourth port of the water cooler is the port connected with the water cooler hydraulic oil outlet pipeline, and functions in conveying the hydraulic oil after effective cooling to the hydraulic device, so that the hydraulic device can work normally.

[0076] In a possible design, the cooling water inlet pipeline 700 is specifically used for injecting the cooling water obtained through the cooling water storage device into the first three-way ball valve 100 or the second three-way ball valve 200.

[0077] Specifically, the temperature of the liquid in the cooling water storage device is higher than that of the cooling water, the cooling water is obtained after the cooling water storage device is cooled, and then the cooling water is injected into the first three-way ball valve 100 or the second three-way ball valve 200, so as to facilitate subsequent work.

[0078] On the basis of the above-mentioned embodiments, the embodiment provides an automatic backwashing device, specifically, when the first three-way ball valve 100 is placed at the preset first position and the second three-way ball valve 200 is placed at the preset second position, the second pipe opening of the first three-way ball valve 100 is in communication with the third pipe opening of the first three-way ball valve 100, and the first pipe opening of the second three-way ball valve 200 is in communication with the second pipe opening of the second three-way ball valve 200.

[0079] Specifically, in the embodiment, when the first three-way ball valve 100 is placed at the preset first position and the second three-way ball valve 200 is placed at the preset second position, it indicates that the three-way ball valve is in the right position, the P opening of the first three-way ball valve 100 is in communication with the A opening of the first three-way ball valve 100, and the A opening of the second three-way ball valve 200 is in communication with the P opening of the second three-way ball valve 200.

[0080] When the first three-way ball valve 100 is placed at the preset third position and the second three-way ball valve 200 is placed at the preset fourth position, the first pipe opening of the first three-way ball valve 100 is in communication with the second pipe opening of the first three-way ball valve 100, and the second pipe opening of the second three-way ball valve 200 is in communication with the third pipe opening of the second three-way ball valve 200.

[0081] Specifically, in the embodiment, when the first three-way ball valve 100 is placed at the preset third position and the second three-way ball valve 200 is placed at the preset fourth position, it indicates that the three-way ball valve is in the left position, the B opening of the first three-way ball valve 100 is in communication with the P opening of the first three-way ball valve 100, and the P opening of the second three-way ball valve 200 is in communication with the B opening of the second three-way ball valve 200.

[0082] The embodiment of the application realizes water flow reversal through the cooperative action of two three-way ball valves, without cutting off the water supply, and achieves the effect of not affecting the cooling function of the water cooler and not affecting the downstream water supply during the reverse flushing process.

[0083] On the basis of the above-mentioned embodiments, the embodiment of the application provides an automatic backwashing device, which further comprises a controller 900.

[0084] The first three-way ball valve 100 comprises a first three-way ball valve body 120 and a first actuator 110, and the second three-way ball valve 200 comprises a second three-way ball valve body 210 and a second actuator 220.

[0085] Specifically, in the embodiment, the first three-way ball valve 100 and the second three-way ball valve 200 each comprise a three-way ball valve body and an actuator. The main function of the actuator is to automatically control the action of the three-way ball valve body through an electrical signal. Through the driving of the actuator, the three-way ball valve body can rotate at different angles, so as to adjust the opening degree of the valve and further control the flow direction and flow rate of the fluid. For an L-shaped three-way ball valve, the actuator can control the fluid to change the flow direction between two passages.

[0086] The first pipe opening of the first three-way ball valve body 120 is connected with the cooling water inlet pipe 700 through the first cooling water inlet branch 410; the second pipe opening of the first three-way ball valve body 120 is connected with the first pipe opening of the water cooler 330 through the water cooler water outlet pipe 310; and the third pipe opening of the first three-way ball valve body 120 is connected with the cooling water storage device through the first cooling water outlet branch 520.

[0087] Specifically, in the embodiment, the connection mode, role and effect of the first pipe opening, the second pipe opening and the third pipe opening of the first three-way ball valve body 120 are similar to those of the first pipe opening, the second pipe opening and the third pipe opening of the first three-way ball valve 100 in the first embodiment, and will not be described here.

[0088] The first pipe opening of the second three-way ball valve body 210 is connected with the cooling water inlet pipe 700 through the second cooling water inlet branch 420; the second pipe opening of the second three-way ball valve body 210 is connected with the second pipe opening of the water cooler 330 through the water cooler water inlet pipe 350; and the third pipe opening of the second three-way ball valve body 210 is connected with the cooling water storage device through the second cooling water outlet branch 510.

[0089] Specifically, in the embodiment, the connection mode, role and effect of the first pipe opening, the second pipe opening and the third pipe opening of the second three-way ball valve body 210 are similar to those of the first pipe opening, the second pipe opening and the third pipe opening of the second three-way ball valve 200 in the above embodiment, and will not be described here.

[0090] The controller 900 is used to periodically control the first actuator 110 and the second actuator 220, so that the first actuator 110 periodically places the first three-way ball valve body 120 in the first position or the third position, and the second actuator 220 periodically places the second three-way ball valve body 210 in the second position or the fourth position.

[0091] Specifically, in the embodiment, the controller controls the left and right position switching of the first three-way ball valve and the second three-way ball valve through a single-point digital output signal, realizes the forward and reverse flow of the cooling water in the water cooler, and when the normal low-frequency switching is performed, the water flow in the water cooler is reversed for a long period, and the condensate in the heat exchange stroke is not easy to deposit on the inner wall of the channel, so that the frequency of the water cooler being blocked by scale can be effectively reduced, the service life of the water cooler is prolonged, and the cooling function of the water cooler and the downstream water supply are not affected during the forward and reverse flushing processes; the number of action elements is small, the control logic is simple, the electrical signal fault is not easy to occur, the reliability of the equipment is not affected, and when the control signal fails, the cooling function of the water cooler is not affected.

[0092] When the first three-way ball valve body 120 is placed in the first position or the third position, and the second three-way ball valve body 210 is placed in the second position or the fourth position, the backwashing principle of the water cooler 330 is similar to the backwashing principle of the water cooler 330 in the above-mentioned embodiment of the application, in which the first three-way ball valve 100 is placed in the preset first position and the second three-way ball valve 200 is placed in the preset second position, or the first three-way ball valve 100 is placed in the preset third position and the second three-way ball valve 200 is placed in the preset fourth position, and thus the details are not described herein again.

[0093] On the basis of the above-mentioned embodiment, the embodiment of the application provides an automatic backwashing device, which further comprises a first pressure sensor, a second pressure sensor and a cooling water outlet pipeline 600.

[0094] The first cooling water outlet branch 520 and the second cooling water outlet branch 510 are both connected with the cooling water storage device through the cooling water outlet pipeline 600.

[0095] Specifically, in the embodiment, the first cooling water outlet branch 520 and the second cooling water outlet branch 510 form a water outlet branch, and the water outlet branch is connected with the cooling water storage device through the cooling water outlet pipeline 600.

[0096] The first pressure sensor is installed on the cooling water inlet pipeline 700, and is used to detect the first pressure of the cooling water inlet pipeline 700; and the second pressure sensor is installed on the cooling water outlet pipeline 600, and is used to detect the second pressure of the cooling water outlet pipeline 600.

[0097] Specifically, in the embodiment, the first pressure is the pressure value of the cooling water inlet pipeline 700, and the second pressure is the pressure value of the cooling water outlet pipeline 600. Under normal circumstances, the pressure difference between the first pressure and the second pressure should be within a reasonable range. If the pressure difference abnormally increases, it indicates that a blockage may occur in the cooler. Timely detection and discovery of such an abnormal condition can help to early eliminate the fault and avoid further damage or efficiency reduction of the system.

[0098] The controller 900 is used to obtain a control frequency according to the numerical relationship between the first pressure and the second pressure, and periodically control the first actuator 110 and the second actuator 220 according to the control frequency.

[0099] In a possible design, the size of the control frequency is positively correlated with the difference between the first pressure and the second pressure.

[0100] Specifically, in the embodiment, the automatic backwashing control logic of the water cooler 330 is as follows:

[0101] If the pressure difference ΔP between the first pressure and the second pressure is less than P1 (P1 is a preset value, which is set according to actual conditions), it indicates that the water passage in the water cooler 330 is normal and does not appear to be blocked to a certain extent. At this time, the controller 900 controls the first three-way ball valve 100 and the second three-way ball valve 200 to periodically switch between the left and right positions at a low frequency, and the low-frequency period T is 0.5-1 h.

[0102] If the pressure difference ΔP between the first pressure and the second pressure is greater than or equal to P1, it indicates that the water passage in the water cooler 330 is blocked to a certain extent. At this time, the controller 900 controls the first three-way ball valve 100 and the second three-way ball valve 200 to periodically switch between the left and right positions at a high frequency, and the high-frequency period T is 5-10 s, and the switching frequency is 5-10 times, and then the low-frequency switching is restored. If the pressure difference ΔP between the first pressure and the second pressure is still greater than P1, the high-frequency backwashing step is repeated.

[0103] If the pressure difference ΔP between the first pressure and the second pressure is greater than or equal to P2 (P2>2P1), it indicates that the water cooler 330 is seriously blocked. The controller 900 controls the first three-way ball valve 100 and the second three-way ball valve 200 to periodically switch between the left and right positions at a high frequency, and the high-frequency period T is 5-10 s, and the sewage in the water cooler 330 is discharged through the sewage outlet, and the subsequent water supply of the device is temporarily suspended, and the low-frequency switching state can be restored to the normal state only after manual inspection and reset.

[0104] The three-way ball valve is used to realize the rapid switching of the water flow in the water cooler, the water flow direction in the water cooler is changed periodically, the deposition of solid condensate on the inner wall of the water cooler is reduced, and after the pressure difference between the first pressure and the second pressure increases, the state of the three-way ball valve is switched multiple times in a short time, so that the water flow in the water cooler is reversed multiple times, a more intense forward and reverse washing is realized, and the purpose of cleaning the water cooler is achieved.

[0105] On the basis of the above embodiment, an automatic backwashing device is provided, and the device further comprises a sewage pipeline 800.

[0106] The sewage pipeline 800 comprises a sewage branch 810 and a sewage valve 820.

[0107] Specifically, in this embodiment, the sewage valve 820 can be a manual ball valve, which is manually opened when the alarm signal is triggered, or can be a pneumatic ball valve or an electric ball valve, which is automatically controlled, and the type of the sewage valve 820 is not limited here.

[0108] When the sewage valve 820 is controlled by the controller 900, the controller 900 is electrically connected with the sewage valve 820, and the connection mode is similar to the electrical connection mode of the controller 900, the first actuator 110 and the second actuator 220, which will not be repeated here.

[0109] If the pressure difference ΔP between the first pressure and the second pressure is greater than or equal to P2, it indicates that there is a more serious blockage in the water cooler 330. The water cooler 330 enters a high-frequency switching state, and at the same time, a feedback alarm signal is sent, and the blowdown valve 820 is opened. When there is a more serious blockage in the water cooler, timely removal of the blockage through the blowdown valve can help reduce equipment wear and tear, improve equipment service life, reduce downtime, and improve work efficiency.

[0110] The third pipe opening of the second three-way ball valve body 210 is connected with the sewage storage device through the second cooling water outlet branch 510 and the blowdown branch 810.

[0111] Specifically, in the embodiment, the sewage after reverse flushing is discharged into the sewage storage device through the second cooling water outlet branch 510 and the blowdown branch 810. Discharging the sewage into the sewage storage device can effectively manage the blockage in the system, maintain the safety and stability of the equipment, reduce environmental pollution, and provide convenience for subsequent cleaning and sewage treatment.

[0112] The blowdown valve 820 is installed on the blowdown branch 810.

[0113] When the difference between the first pressure and the second pressure is greater than a preset difference threshold, the controller 900 is configured to control the blowdown valve 820 to be opened; otherwise, the controller 900 is configured to control the blowdown valve 820 to be closed.

[0114] Specifically, in the embodiment, when the difference between the first pressure and the second pressure is greater than a preset difference threshold, the controller 900 is configured to control the blowdown valve 820 to be opened. The preset difference threshold and how to determine whether there is a blockage in the water cooler 330 by comparing the difference between the first pressure and the second pressure with the difference threshold have been described in detail in the above embodiment, and will not be repeated here.

[0115] On the basis of the above embodiment, the present embodiment provides an automatic backwashing device, which further comprises a temperature sensor.

[0116] The temperature sensor is installed on the hydraulic oil outlet pipeline 320 of the water cooler, and the temperature sensor is configured to detect the working temperature of the hydraulic oil; and the frequency is positively correlated with the working temperature.

[0117] Specifically, in this embodiment, due to the different cooling efficiencies caused by the forward and reverse flow of water in the water cooler 330, according to the feedback from the temperature sensor on the hydraulic oil outlet pipe 320 of the water cooler, when the hydraulic oil temperature T is greater than the warning temperature T1, the water flow in the water cooler 330 will be fixed in the forward flow state with higher cooling efficiency. The first three-way ball valve 100 and the second three-way ball valve 200 are both in the right position. When the hydraulic oil temperature T is less than T1-10℃, the water cooler 330 returns to the normal low-frequency switching state.

[0118] The control circuit is that the controller 900 receives feedback signals from the first pressure sensor, the second pressure sensor, and the temperature sensor, and then controls the actuators of the first three-way ball valve 100 and the second three-way ball valve 200 through the output signal circuit, so that the P port of the three-way ball valve switches between being connected to the A port and being connected to the B port.

[0119] control circuit Figure 1 The dashed line in the diagram indicates that the controller 900 is electrically connected to the first pressure sensor, the second pressure sensor, and the temperature sensor.

[0120] By using feedback from the first pressure sensor, the second pressure sensor, and the temperature sensor, the switching state and frequency of the first three-way ball valve and the second three-way ball valve are controlled, which achieves the purpose of backwashing the water cooler without affecting the water supply demand of the equipment.

[0121] This application also provides an automatic backwashing system, including:

[0122] Cooling water storage device, hydraulic device, and automatic backwashing device provided in the above embodiments.

[0123] The automatic backwashing system provided in this application embodiment has a similar implementation principle and technical effect to the automatic backwashing device in the above embodiment, and will not be described again here.

[0124] In one possible design, the cooling water storage device is equipped with a cooling mechanism to cool the liquid in the cooling water storage device and obtain cooling water.

[0125] Specifically, the cooling water storage device is equipped with a cooling mechanism that cools the liquid in the cooling water storage device to obtain cooling water, which is then injected into the first three-way ball valve or the second three-way ball valve to facilitate subsequent operations.

Claims

1. An automatic backwash device characterized by, The application relates to a water cooling device for hydraulic devices, which comprises: a water cooler water inlet pipeline (350), a water cooler water outlet pipeline (310), a water cooler (330), a water cooler hydraulic oil inlet pipeline (340), a water cooler hydraulic oil outlet pipeline (320), a first cooling water inlet branch (410), a second cooling water inlet branch (420), a first cooling water outlet branch (520), a second cooling water outlet branch (510), a first three-way ball valve (100), a second three-way ball valve (200) and a cooling water inlet pipeline (700); a first pipe opening of the first three-way ball valve (100) is connected with the cooling water inlet pipeline (700) through the first cooling water inlet branch (410); a first pipe opening of the second three-way ball valve (200) is connected with the cooling water inlet pipeline (700) through the second cooling water inlet branch (420); and the cooling water inlet pipeline (700) is used for injecting cooling water into the first three-way ball valve (100) or the second three-way ball valve (200); a second pipe opening of the first three-way ball valve (100) is connected with a first pipe opening of the water cooler (330) through the water cooler water outlet pipeline (310); and a second pipe opening of the second three-way ball valve (200) is connected with a second pipe opening of the water cooler (330) through the water cooler water inlet pipeline (350); a third pipe opening of the first three-way ball valve (100) is connected with a cooling water storage device through the first cooling water outlet branch (520); and a third pipe opening of the second three-way ball valve (200) is connected with the cooling water storage device through the second cooling water outlet branch (510); when the first three-way ball valve (100) is arranged at a preset first position and the second three-way ball valve (200) is arranged at a preset second position, the second pipe opening of the first three-way ball valve (100) is in communication with the third pipe opening of the first three-way ball valve (100), and the first pipe opening of the second three-way ball valve (200) is in communication with the second pipe opening of the second three-way ball valve (200); when the first three-way ball valve (100) is arranged at a preset third position and the second three-way ball valve (200) is arranged at a preset fourth position, the first pipe opening of the first three-way ball valve (100) is in communication with the second pipe opening of the first three-way ball valve (100), and the second pipe opening of the second three-way ball valve (200) is in communication with the third pipe opening of the second three-way ball valve (200); a third pipe opening of the water cooler (330) is connected with an oil outlet pipe opening of a hydraulic device through the water cooler hydraulic oil inlet pipeline (340); and a fourth pipe opening of the water cooler (330) is connected with an oil inlet pipe opening of the hydraulic device through the water cooler hydraulic oil outlet pipeline (320).

2. The automatic backwash device of claim 1, wherein The application further comprises a controller (900); the first three-way ball valve (100) comprises a first three-way ball valve body (120) and a first actuator (110), and the second three-way ball valve (200) comprises a second three-way ball valve body (210) and a second actuator (220). The first pipe opening of the first three-way ball valve body (120) is connected with the cooling water inlet pipeline (700) through the first cooling water inlet branch (410); the second pipe opening of the first three-way ball valve body (120) is connected with the first pipe opening of the water cooler (330) through the water cooler outlet pipeline (310); and the third pipe opening of the first three-way ball valve body (120) is connected with the cooling water storage device through the first cooling water outlet branch (520); The first pipe opening of the second three-way ball valve body (210) is connected with the cooling water inlet pipeline (700) through the second cooling water inlet branch (420); the second pipe opening of the second three-way ball valve body (210) is connected with the second pipe opening of the water cooler (330) through the water cooler inlet pipeline (350); and the third pipe opening of the second three-way ball valve body (210) is connected with the cooling water storage device through the second cooling water outlet branch (510); The controller (900) is configured to periodically control the first actuator (110) and the second actuator (220) so that the first actuator (110) periodically places the first three-way ball valve body (120) in the first position or the third position, and the second actuator (220) periodically places the second three-way ball valve body (210) in the second position or the fourth position.

3. The automatic backwash device of claim 2, wherein, The first pressure sensor, the second pressure sensor and the cooling water outlet pipeline (600) are further included; The first cooling water outlet branch (520) and the second cooling water outlet branch (510) are both connected with the cooling water storage device through the cooling water outlet pipeline (600); The first pressure sensor is installed on the cooling water inlet pipeline (700) and is configured to detect the first pressure of the cooling water inlet pipeline (700); and the second pressure sensor is installed on the cooling water outlet pipeline (600) and is configured to detect the second pressure of the cooling water outlet pipeline (600); The controller (900) is configured to obtain a control frequency according to the numerical relationship between the first pressure and the second pressure, and periodically control the first actuator (110) and the second actuator (220) according to the control frequency.

4. The automatic backwash device of claim 3, wherein The control frequency is positively related to the difference between the first pressure and the second pressure.

5. The automatic backwash device of claim 4, wherein, The blowdown pipeline (800) is further included; The blowdown pipeline (800) includes a blowdown branch (810) and a blowdown valve (820); The third pipe opening of the second three-way ball valve body (210) is connected with the sewage storage device through the second cooling water outlet branch (510) and the blowdown branch (810); The blowdown valve (820) is installed on the blowdown branch (810); When a difference between the first pressure and the second pressure is greater than a preset difference threshold, the controller (900) is configured to control the blowdown valve (820) to open; otherwise, the controller (900) is configured to control the blowdown valve (820) to close.

6. The automatic backwash device according to claim 4 or 5, characterized in that Further comprising a temperature sensor; The temperature sensor is installed on the water cooler hydraulic oil outlet pipeline (320), and is configured to detect a working temperature of the hydraulic oil; and the frequency is positively correlated with the working temperature.

7. The automatic backwash device of claim 1, wherein The cooling water inlet pipeline (700) is specifically configured to inject the cooling water obtained through the cooling water storage device into the first three-way ball valve (100) or the second three-way ball valve (200).

8. An automatic backwash system characterized in that, Comprise: The cooling water storage device, the hydraulic device, and the automatic backwashing device according to any one of claims 1 to 7.

9. The automatic backwash system of claim 8, wherein, The cooling water storage device is provided with a cooling mechanism, so that the liquid in the cooling water storage device is cooled and treated through the cooling mechanism to obtain the cooling water.

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