An expansion tank device for liquid flow, a control method and a pressure regulating device

Abstract

The application discloses a liquid flow expansion tank device and a control method and a pressure regulating device, and belongs to the technical field of liquid flow expansion tank devices.The expansion tank device comprises an expansion tank, a first valve body, a second valve body, a third valve body, a first pipeline, a second pipeline and a bypass pipeline; wherein the expansion tank comprises an expansion tank body and a rubber balloon, the rubber balloon is arranged in the expansion tank body; the rubber balloon is provided with a first interface and a second interface, one end of the first pipeline is connected with the first interface by penetrating through the expansion tank body; one end of the first pipeline is connected with one end of the bypass pipeline, the third valve body is arranged on the bypass pipeline; the first valve body is arranged on the first pipeline, and the first valve body is located between the bypass pipeline and the other end of the first pipeline; one end of the second pipeline is connected with the second interface by penetrating through the expansion tank body, and the second pipeline extends from the second interface to the upper middle position of the rubber balloon; and the second valve body is arranged on the second pipeline. The device and the method can solve the problems of difficult medium flow of the expansion tank and difficult operation and maintenance of the expansion tank medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of expansion tank maintenance and operation, and more particularly, to an expansion tank device with liquid flow, a control method and a pressure regulating device. BACKGROUND

[0002] In the prior art, the gas bag type expansion tank has been widely used in central air conditioning, boilers, water heaters, constant pressure water supply, liquid cooling temperature control units and other equipment, and is an important component for maintaining the normal liquid pressure in the equipment. The common gas bag type expansion tank is internally provided with a whole rubber bladder, and the rubber bladder is provided with a pipeline interface connected with the liquid in the main pipeline of the equipment. In operation, the liquid enters the rubber bladder through the pipeline interface. The expansion tank body is not communicated with the rubber bladder, and the pressure caused by the liquid entering the rubber bladder is compared with the liquid pressure in the main pipeline of the equipment, and the pressure difference formed by the two is used to guide the liquid to enter or exit the rubber bladder, so as to regulate the liquid pressure in the main pipeline of the equipment and maintain it at a normal level. When the liquid pressure in the main pipeline of the equipment changes slightly, the expansion of the rubber bladder or the contraction of the rubber bladder has a certain buffering effect on the change of the liquid pressure in the main pipeline of the equipment, thereby ensuring the stable liquid pressure during the operation of the equipment.

[0003] It can be understood that, because the liquid in the main pipeline of the equipment itself has a certain pressure, when the liquid in the main pipeline of the equipment is normally operated, a certain amount of solution should be stored in the rubber bladder to maintain the balance. Based on the pressure regulation of the expansion tank, the pressure regulation belongs to the regulation of slight change of pressure and the incompressibility of the liquid. In the process of pressure regulation, only a small amount of liquid enters and is squeezed out of the rubber bladder, and most of the solution in the rubber bladder is always in the rubber bladder without flowing, which leads to the growth of microorganisms in this part of the liquid, the deterioration of the quality of the liquid, the occurrence of precipitation and sour smell, and even causes corrosion and damage of the expansion tank and affects the safe operation of the liquid in the main pipeline of the equipment.

[0004] Therefore, it is necessary to improve the structure and liquid flow method of the existing expansion tank based on the liquid flow problem of the expansion tank. SUMMARY

[0005] The present application aims to overcome at least one of the above-mentioned defects (shortcomings) of the prior art, and provides an expansion tank device with liquid flow, a control method and a pressure regulating device, which are used to solve the problems of difficult flow of the medium in the expansion tank and difficult operation and maintenance of the medium in the expansion tank.

[0006] According to a first aspect of the present application, an expansion tank device with liquid flow is provided, which comprises an expansion tank, a first valve body, a second valve body, a third valve body, a first pipeline, a second pipeline and a bypass pipeline.

[0007] The inflation tank comprises a tank body, a tank air nozzle and a rubber balloon, the tank air nozzle is arranged on the wall of the tank body, the tank air nozzle and the tank body are in a sealed state, and the rubber balloon is arranged inside the tank body and a cavity is reserved between the rubber balloon and the tank body;

[0008] The rubber balloon is provided with a first interface and a second interface, one end of the first pipeline is connected with the first interface by penetrating the tank body, and the other end of the first pipeline is used for connecting with a low-pressure area of a medium for equipment operation; one end of the first pipeline is connected with the first valve body, and the other end of the first pipeline is used for connecting with a low-pressure area of a medium outside the equipment, the third valve body is arranged on the bypass pipeline, and the third valve body is arranged outside the tank body; the first valve body is arranged on the first pipeline, and the first valve body is arranged outside the tank body and between the bypass pipeline and the other end of the first pipeline;

[0009] One end of the second pipeline is connected with the second interface by penetrating the tank body, and the second pipeline extends from the second interface to the upper middle part of the rubber balloon; the other end of the second pipeline is used for connecting with a high-pressure area of a medium for equipment operation, the second valve body is arranged on the second pipeline, and the second valve body is arranged outside the tank body.

[0010] It can be understood that the inflation tank device is an improvement of the traditional inflation tank structure, the short pipeline first pipeline and the interface for discharging the medium from the rubber balloon and the long pipeline second pipeline and the interface for entering the rubber balloon are arranged, the traditional inflation tank structure only uses one interface for the in-out of the medium, and thus the problems of breeding of microorganisms in the solution in the rubber balloon, deterioration of the medium quality, precipitation and sour and smelly odor are solved, the service life of the inflation tank is effectively prolonged, and technical support is provided for continuous safe and reliable operation of the equipment; and the three valve bodies are arranged on different medium pressure areas, the difficulty of operation and maintenance is reduced, and efficient and simple operation and maintenance of the medium in the rubber balloon are realized. It can be understood that the inflation tank body and the rubber balloon form a cavity, the cavity is pre-charged with air of a certain standard pressure, the quality of the medium in the rubber balloon can control the size of the rubber balloon, if the medium pressure in the equipment is greater than the medium pressure in the rubber balloon, the medium is squeezed to supplement the medium in the rubber balloon, the size of the rubber balloon is increased, the air in the cavity is squeezed, the pressure of the gas is increased, and under the interaction of the pressure of the gas, the pressure of the medium in the rubber balloon and the pressure of the medium in the equipment, the system is constantly balanced to reach a state of stabilizing the pressure of the equipment.

[0011] Optionally, the first valve body is an electromagnetic valve, an electric ball valve or a manual ball valve.

[0012] And / or, the second valve body is a solenoid valve, an electric ball valve or a manual ball valve;

[0013] And / or, the third valve body is a solenoid valve, an electric ball valve or a manual ball valve.

[0014] It can be understood that the first valve body, the second valve body and the third valve body can adopt one of a solenoid valve, an electric ball valve or a manual ball valve, using a solenoid valve or an electric ball valve can be electrically controlled, saving manpower and tedious manual control operation; using a manual ball valve can save cost, making the whole scheme more economical.

[0015] Optionally, the expansion tank device further comprises a control unit, and the first valve body, the second valve body and the third valve body are further electrically connected with the control unit.

[0016] It can be understood that the control unit can electrically control the first valve body, the second valve body and the third valve body, and can run a scheme script to intelligently execute different running schemes, saving manpower and material resources and improving the efficiency of operation and maintenance.

[0017] According to the second aspect of the present application, a pressure regulating device for a medium area is provided, which is used for regulating the pressure of the medium area connected with the liquid flow expansion tank device, and comprises a device working medium low pressure area, a device external medium low pressure area and a device working medium high pressure area, wherein the device working medium low pressure area is connected with the other end of the first pipeline; the device external medium low pressure area is connected with the other end of the bypass pipeline; and the device working medium high pressure area is connected with the other end of the second pipeline.

[0018] It can be understood that for different medium pressure state areas connected with each pipeline of the expansion tank device, a pressure regulating device for the medium area is needed, which helps to maintain the pressure state of the area connected with each pipeline, realizes the prerequisite of the control method for the expansion tank device and improves the efficiency of operation and maintenance.

[0019] According to the third aspect of the present application, a control method of a liquid flow expansion tank device is provided, which is used for controlling the liquid flow expansion tank device, and the control method comprises:

[0020] Obtaining the running mode of the expansion tank device, wherein the running mode comprises a working mode and a maintenance mode;

[0021] If the running mode of the expansion tank device is in the working mode, then the first valve body is controlled to be in an open state, and the second valve body and the third valve body are controlled to be in a closed state, and the first pipeline and the first interface are communicated through the first valve body to regulate the pressure of the device working medium;

[0022] corresponding to the operation and maintenance mode, if the operation mode of the expansion tank device is in the operation and maintenance mode, obtaining the operation and maintenance scheme, and performing operation and maintenance on the expansion tank device according to the operation and maintenance scheme.

[0023] It can be understood that the operation mode of the expansion tank device is divided into a working mode and an operation and maintenance mode. The working mode can maintain stable equipment medium pressure, and the operation and maintenance mode can provide various efficient operation and maintenance schemes to realize precise operation and maintenance without affecting the normal operation of the expansion tank.

[0024] Optionally, the operation and maintenance scheme includes a first operation and maintenance scheme, and the first operation and maintenance scheme is:

[0025] controlling the first valve body and the second valve body to be in a closed state, controlling the third valve body to be in an open state, controlling the medium in the rubber balloon to be discharged to a low-pressure area outside the equipment through the first interface, the first pipeline, the bypass pipeline and the third valve body, so as to empty the medium in the rubber balloon;

[0026] after the medium in the rubber balloon is emptied, controlling the first valve body and the third valve body to be in a closed state, and controlling the second valve body to be in an open state, and supplementing the medium in the rubber balloon by using a high-pressure area of the equipment, the second pipeline and the second valve body;

[0027] after the medium is supplemented, controlling the first valve body to be in an open state, and controlling the second valve body and the third valve body to be in a closed state, and switching the operation mode of the expansion tank device from the operation and maintenance mode to the working mode.

[0028] It can be understood that the first operation and maintenance scheme can realize the operation and maintenance effect of discharging the medium in the rubber balloon first and then supplementing the medium. The third valve body is arranged on the bypass pipeline, and the bypass pipeline is externally connected to the low-pressure area of the medium outside the equipment. The pressure difference between this area and the medium in the rubber balloon can discharge all the medium in the rubber balloon, which is suitable for the demand of replacing all the medium in the rubber balloon. After the medium is discharged, the medium can be supplemented into the rubber balloon through the second pipeline to ensure the normal operation of the rubber balloon.

[0029] Optionally, the operation and maintenance scheme includes a second operation and maintenance scheme, and the second operation and maintenance scheme is:

[0030] controlling the first valve body to be in a closed state, controlling the second valve body and the third valve body to be in an open state, and controlling the medium in the rubber balloon to be discharged to a medium low-pressure area outside the device through the first interface, the first pipeline, the bypass pipeline and the third valve body, while supplementing the medium in the rubber balloon by using a medium high-pressure area where the device works, the second pipeline and the second valve body;

[0031] After the original medium in the rubber balloon is exhausted and the supplement of the new medium is completed, the first valve body is controlled to be in an open state, the second valve body and the third valve body are controlled to be in a closed state, and the operation mode of the inflation tank device is switched from the operation and maintenance mode to the working mode.

[0032] It can be understood that the second operation and maintenance scheme can realize the operation and maintenance effect of simultaneously discharging and supplementing the medium in the rubber balloon, and is suitable for the demand of replacing all the medium in the rubber balloon, and can improve the utilization rate of the operation and maintenance time.

[0033] Optionally, the operation and maintenance scheme includes a third operation and maintenance scheme, and the third operation and maintenance scheme is:

[0034] The inflation tank device is subjected to an internal circulation operation: the first valve body and the second valve body are controlled to be in an open state, the third valve body is controlled to be in a closed state, the medium in the rubber balloon is supplemented by using the medium high-pressure area where the device works, the second pipeline and the second valve body, and the medium in the rubber balloon is discharged to a medium low-pressure area where the device works through the first interface, the first pipeline and the first valve body;

[0035] After the internal circulation operation of the medium in the rubber balloon and the medium in the device is completed, the first valve body is controlled to be in an open state, the second valve body and the third valve body are controlled to be in a closed state, and the operation mode of the inflation tank device is switched from the operation and maintenance mode to the working mode.

[0036] It can be understood that the third operation and maintenance scheme can realize the operation and maintenance effect of simultaneously discharging and supplementing the medium in the rubber balloon in the device, and is suitable for the demand of promoting the flow of all the medium in the rubber balloon at a time, so as to achieve the effect of running water.

[0037] Optionally, the control unit further includes a timing module, and the timing module is pre-designed with a timing time T; the operation and maintenance scheme includes a fourth operation and maintenance scheme, and the fourth operation and maintenance scheme is:

[0038] The initial value of the timing time T of the timing module is 0, and timing is started, when the timing time T is equal to a preset time threshold T1, an inner loop operation is implemented: the operation mode of the expansion tank device is automatically switched from the working mode to the operation and maintenance mode, the first valve body and the second valve body are controlled to be in the open state, the third valve body is controlled to be in the closed state, the rubber balloon is supplemented with medium by using the high-pressure area of the medium used by the equipment, the second pipeline and the second valve body, and meanwhile the medium in the rubber balloon is discharged to the low-pressure area of the medium used by the equipment through the first interface, the first pipeline and the first valve body;

[0039] After the inner loop operation of the medium in the rubber balloon and the medium in the equipment is completed, the first valve body is controlled to be in the open state, the second valve body and the third valve body are controlled to be in the closed state, and the operation mode of the expansion tank device is switched from the operation and maintenance mode to the working mode;

[0040] After switching to the working mode, the timing time T is reset to 0 and a new round of timing is started, when the timing time T is equal to the time threshold T1 again, the inner loop operation is implemented again.

[0041] It can be understood that the fourth operation and maintenance scheme realizes the operation and maintenance effect of simultaneously discharging and supplementing the medium in the rubber balloon in the equipment, is suitable for the demand of promoting the flow of all the medium in the rubber balloon multiple times, achieves the effect of living water, and is executed by using automatic circulation, can save manpower and material resources, realizes automatic operation and maintenance of the medium in the rubber balloon at fixed time, and improves the operation and maintenance efficiency.

[0042] Based on any one of the above aspects, the liquid flow expansion tank device, the control method and the pressure regulating device provided by the embodiments of the present application can realize the ingenious switching of the working mode and the operation and maintenance mode of the expansion tank device by the first valve body, the second valve body, the third valve body and the areas of different medium states connected by different channels, in combination with different operation and maintenance schemes, can provide different operation and maintenance schemes to realize the operation and maintenance of the rubber balloon in different scenes and different demands, can solve the problems of difficult flow of the expansion tank medium and difficult operation and maintenance of the expansion tank medium, and provide the operation and maintenance efficiency of the expansion tank medium. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0044] Figure 1A structural diagram of a liquid flow expansion tank device provided for the embodiment.

[0045] Figure 2 A control method flow chart of a liquid flow expansion tank device provided for the embodiment.

[0046] Figure 3 A flow chart of a first operation and maintenance scheme provided for the embodiment.

[0047] Figure 4 A flow chart of a second operation and maintenance scheme provided for the embodiment.

[0048] Figure 5 A flow chart of a third operation and maintenance scheme provided for the embodiment.

[0049] Figure 6 A flow chart of a fourth operation and maintenance scheme provided for the embodiment.

[0050] Icon: 101-expansion tank body, 102-expansion tank gas nozzle, 103-gas nozzle sealing cap, 104-rubber balloon, 105-first pipeline, 106-second pipeline, 107-third valve body, 108-first valve body, 109-second valve body, 110-circulating pump, 111-equipment working low pressure area, 112-equipment working high pressure area, 113-control unit, 114-first interface, 115-second interface, 116-bypass pipeline. DETAILED DESCRIPTION

[0051] The drawings of the present application are only used for illustrative description, and cannot be understood as the limitation of the present application. In order to better illustrate the following embodiments, some components of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; it is understandable that some well-known structures in the drawings and their descriptions may be omitted for those skilled in the art.

[0052] In order to enable the personnel in the technical field to better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0053] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0054] The air bag type expansion tank is usually used to maintain the stability of the medium pressure in the equipment, and the air bag type expansion tank usually contains a rubber bladder inside, which is communicated with the medium environment in the equipment through an interface and a pipeline. The stability of the medium pressure in the equipment is maintained by balancing the air pressure in the expansion tank, the medium pressure in the rubber bladder and the medium pressure in the equipment. However, in the conventional expansion tank structure, only a small part of the medium can flow, and the operation and maintenance of the medium in the rubber bladder is very difficult, the operation and maintenance operation is single, and it is not enough to meet the daily operation and maintenance needs of the medium in the expansion tank. Therefore, based on the above problems, the expansion tank structure and the operation and maintenance method are improved.

[0055] The embodiment provides a technical solution that can solve the above problems. The specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0056] Exemplarily, a structural diagram of a liquid flow expansion tank device provided by the embodiment of the present application is shown in the figure. Figure 1 As shown in the figure, the expansion tank device includes an expansion tank, a first valve body 108, a second valve body 109, a third valve body 107, a first pipeline 105, a second pipeline 106 and a bypass pipeline 116.

[0057] The expansion tank includes an expansion tank body 101, an expansion tank air nozzle 102 and a rubber bladder 103. The expansion tank air nozzle 102 is arranged on the wall of the expansion tank body. The expansion tank air nozzle 102 and the expansion tank body 101 are in a sealed state. The rubber bladder 103 is arranged inside the expansion tank body 101, and a cavity is reserved between the rubber bladder 103 and the expansion tank body 101.

[0058] The rubber balloon is provided with a first interface 114 and a second interface 115, one end of the first pipeline 105 is connected with the first interface 114 through the inflation tank body 101, and the other end of the first pipeline 105 is used for accessing the medium low pressure area 111 of the equipment operation; one end of the first pipeline 105 is connected with the first valve body 108, and the other end of the bypass pipeline 116 is used for accessing the medium low pressure area outside the equipment, the third valve body 107 is arranged on the bypass pipeline 116, and the third valve body 107 is arranged outside the inflation tank body 101; the first valve body 108 is arranged on the first pipeline 105, and the first valve body 108 is arranged outside the inflation tank body 101 and between the bypass pipeline 116 and the other end of the first pipeline 105.

[0059] One end of the second pipeline 106 is connected with the second interface 115 through the inflation tank body 101, and the second pipeline 106 extends from the second interface 115 to the upper middle position of the rubber balloon 104; the other end of the second pipeline 106 is used for accessing the medium high pressure area 112 of the equipment operation, and the second valve body 109 is arranged on the second pipeline 106, and the second valve body 109 is arranged outside the inflation tank body 101.

[0060] Exemplarily, the specific working principle of the inflation tank is as follows:

[0061] A cavity is reserved between the inflation tank body 101 and the rubber balloon 104, and the cavity needs to be pre-charged with air at a standard air pressure before the inflation tank starts to be used. It can be understood that the inflation tank can be built in different equipment for use, such as central air conditioners, boilers, water heaters, constant pressure water supply, liquid cooling temperature control units and the like, and the medium environment circulated in the internal working of different equipment is different, so that the pressure reached by the medium during normal operation of the equipment is different, so different standard air pressures in the cavity need to be set according to the normal medium pressure required by different equipment, and then the corresponding air amount is pre-charged to reach the corresponding standard air pressure, so that the inflation tank can more accurately maintain the stability of the equipment medium pressure. Preferably, the air in the cavity can be replaced by other media, and the replacement principle meets the needs of the industry, which is not the focus of the present application and will not be described here. It can be understood that the gas pressure in the cavity is determined according to the specific equipment and use scene, and the gas pressure should be less than the pressure of the medium at the connection between the inflation tank and the equipment inlet side, i.e. the connection between the first pipeline 116 and the equipment, during normal operation of the corresponding equipment, that is, a certain amount of medium is stored in the rubber balloon 104 during normal operation of the equipment.

[0062] When the medium pressure of the stable running device changes, such as the medium pressure of the device increases more than the gas pressure in the cavity in the stable running state, part of the medium will enter the rubber balloon 104 under the action of pressure difference, the volume of the rubber balloon 104 increases, further compressing the air in the cavity, and the air is compressed to increase the air pressure. When the pressure increases to equal the pressure of the medium at the connection between the first pipeline 116 and the device, the medium stops entering the rubber balloon 104, and the device reaches a new stable running state. Conversely, when the medium pressure at the device inlet side, i.e. the first valve body 108, decreases, i.e. the medium pressure at the connection between the first pipeline 116 and the device is lower than the gas pressure in the cavity, the medium in the rubber balloon 104 will be squeezed out to supplement the medium in the device, so that the medium pressure at the connection between the first pipeline 116 and the device increases. Under the interaction of the gas pressure in the cavity, the medium pressure in the rubber balloon 104 and the medium pressure in the device, and until the medium pressure at the connection between the first pipeline 116 and the device is equal to the air pressure in the cavity, the device medium pressure reaches a new stable state. Therefore, when the device medium pressure changes slightly, the expansion of the rubber balloon 104 has a certain buffering effect on the change of the device medium pressure, thereby ensuring the stable running pressure of the device.

[0063] Preferably, the inflation tank gas nozzle 102 further comprises a gas nozzle sealing cap 103 installed on the top of the inflation tank gas nozzle 102, and the inflation tank gas nozzle 102 and the gas nozzle sealing cap 103 are connected by a sealing ring end face sealing scheme.

[0064] It can be understood that the inflation tank gas nozzle 102 is used to fill air or other medium in the cavity. Common inflation tank gas nozzles 102 are similar to automobile tire inflation nozzles, mainly using a sealing ring, and there will be a certain gas leakage after a long time of running. The accuracy of the air or other medium pressure in the cavity directly affects the effectiveness of the inflation tank buffering function, so the air tightness of the inflation tank is very important for the accurate work of the inflation tank.

[0065] In this embodiment, the sealing ring end face sealing scheme is used to seal the connection between the original inflation tank gas nozzle 102 and the top of the inflation tank, and a gas nozzle sealing cap 103 is additionally provided, which is also sealed by a sealing ring end face sealing scheme, so that a double sealing is formed, which can effectively eliminate the problem of slight leakage of a single sealing and reduce the maintenance frequency of the maintenance personnel.

[0066] It can be understood that the sealing ring end face sealing scheme is a sealing technology widely used in mechanical equipment, which aims to prevent the leakage of liquid or gas through the close cooperation between the sealing ring and the contact surface. It includes O-ring sealing, V-ring sealing, U-ring sealing and other sealing schemes, and the corresponding sealing scheme can be used according to different specifications and application scenarios of the inflation tank.

[0067] In the embodiment, the standard calibration of the gas pressure in the cavity and the maintenance of the airtightness of the expansion tank play an important role in the whole operation of the expansion tank. Most of the traditional expansion tank nozzles only have one sealing work, that is, the expansion tank nozzle is sealed at the connection with the top of the expansion tank by using the traditional sealing method. After a long time of operation, there is a certain gas leakage in such a sealing scheme. The above situation needs the operation and maintenance personnel to carry out regular maintenance and check the airtightness of the expansion tank, which increases the workload of the operation and maintenance personnel and also causes a large number of in-use expansion tanks not to carry out regular inspection and maintenance work until the expansion tank fails to affect the normal operation of the equipment, which greatly affects the working effect of the expansion tank. In the present application, the expansion tank nozzle is further provided with a nozzle sealing cap, which is connected by using a sealing ring end face sealing scheme, so that double sealing can be formed in the expansion tank nozzle, which can effectively eliminate the micro-leakage problem of one sealing and reduce the maintenance frequency of the operation and maintenance personnel.

[0068] Specifically, the first valve body 108 is an electromagnetic valve, an electric ball valve or a manual ball valve;

[0069] And / or, the second valve body 109 is an electromagnetic valve, an electric ball valve or a manual ball valve;

[0070] And / or, the third valve body 107 is an electromagnetic valve, an electric ball valve or a manual ball valve.

[0071] In the embodiment, the first valve body 108, the second valve body 109 and the third valve body 107 can all adopt one of an electromagnetic valve, an electric ball valve or a manual ball valve. Using an electromagnetic valve or an electric ball valve can be electrically connected with a control unit and can realize remote control of the opening and closing of the first valve body 108, the second valve body 109 and the third valve body 107 by the operation and maintenance personnel through the control unit, so as to realize intelligent control of the expansion tank device. Using a manual ball valve needs the operation and maintenance personnel to manually control the opening and closing of each valve body, which can save electricity and control cost.

[0072] Specifically, the expansion tank device further comprises a control unit 113, and the first valve body 108, the second valve body 109 and the third valve body 107 are further electrically connected with the control unit 113.

[0073] In the embodiment, if the control unit 113 is needed to control different valve bodies, the three valve bodies need to adopt an electromagnetic valve or an electric ball valve and be electrically connected with the control unit 113, and the opening and closing instructions issued by the control unit 113 are introduced respectively, so as to realize remote control of the three valve bodies. Moreover, the control unit 113 can record and run scripts of different operation and maintenance schemes, so that the three valve bodies can realize different operation and maintenance schemes according to the scripts, which greatly enhances the intelligence of the device.

[0074] In the embodiment, a circulating pump 110 is arranged in the device medium circulating pipeline, which can provide power for the medium circulation of the device and maintain the flow of the medium in the device. Figure 1 As shown in the figure, 111 is a low-pressure medium area for the operation of the device, which is a low-power medium area in the device operation medium pipeline, and 112 is a high-pressure medium area for the operation of the device, which is a high-power medium area in the device operation medium pipeline; the low-pressure medium area 111 for the operation of the device is connected to the inlet of the circulating pump 110, and the high-pressure medium area 112 for the operation of the device is connected to the outlet of the circulating pump. The circulating pump 110 can also be electrically connected to the control unit 113 to realize intelligent control of the circulating pump 110.

[0075] On the other hand, the application also provides a medium area pressure regulating device for regulating the pressure of the medium area connected to the liquid flow expansion tank device, which comprises a low-pressure medium area for the operation of the device 111, a low-pressure medium area outside the device, and a high-pressure medium area for the operation of the device 112, wherein the low-pressure medium area for the operation of the device 111 is connected to the other end of the first pipeline 105; the low-pressure medium area outside the device is connected to the other end of the bypass pipeline 116; and the high-pressure medium area for the operation of the device 112 is connected to the other end of the second pipeline 109.

[0076] In the embodiment, the flow of the medium is promoted by the pressure difference between the media at different positions, so the pressure difference is the premise of controlling the flow of the medium in the device and the device. The pressure regulating device can create a low-pressure medium environment in the low-pressure medium area for the operation of the device 111, so that the medium can flow out of the device pipeline in the rubber balloon 104; the pressure regulating device can create a low-pressure medium environment in the low-pressure medium area outside the device, so that the medium can flow out of the device outside in the rubber balloon 104; and the pressure regulating device can create a high-pressure medium environment in the high-pressure medium area for the operation of the device 112, so that the medium can flow into the rubber balloon 104, thereby ensuring the smooth progress of the control method.

[0077] On the other hand, the application also provides a control method for a liquid flow expansion tank device, as shown in the figure, the method can be divided into the following steps: Figure 2 As shown in the figure, the method can be divided into the following steps:

[0078] S100, obtaining the operation mode of the expansion tank device, the operation mode comprising a working mode and a maintenance mode;

[0079] S200, if the operation mode of the expansion tank device is in the working mode, then controlling the first valve body 108 to be in an open state, controlling the second valve body 109 and the third valve body 107 to be in a closed state, and realizing the communication of the first pipeline 105 and the first interface 114 through the first valve body 108 for regulating the pressure of the medium for the operation of the device;

[0080] S300, preset an operation and maintenance scheme corresponding to the operation and maintenance mode, if the operation mode of the expansion tank device is in the operation and maintenance mode, obtain the operation and maintenance scheme, and perform operation and maintenance on the expansion tank device according to the operation and maintenance scheme.

[0081] In this embodiment, the working mode of the expansion tank device is to stabilize the medium operating pressure in the equipment; the operation and maintenance mode can perform operation and maintenance on the medium in the rubber balloon 104, including replacing the internal medium, supplementing the internal medium, circulating the internal medium and the like, and provides different operation and maintenance schemes to adapt to different operation and maintenance scenes.

[0082] Specifically, as shown in Figure 3 The first operation and maintenance scheme can be subdivided into the following steps:

[0083] S311, control the first valve body 108 and the second valve body 109 to be in a closed state, control the third valve body 107 to be in an open state, control the medium in the rubber balloon 104 to be discharged to the low-pressure area of the medium outside the equipment through the first interface 114, the first pipeline 105, the bypass pipeline 116 and the third valve body 107, so as to empty the medium in the rubber balloon 104;

[0084] S312, after the medium in the rubber balloon 104 is emptied, control the first valve body 108 and the third valve body 107 to be in a closed state, control the second valve body 109 to be in an open state, and supplement the medium in the rubber balloon 104 by using the high-pressure area of the equipment working medium 112, the second pipeline 106 and the second valve body 109;

[0085] S313, after the medium is supplemented, control the first valve body 108 to be in an open state, control the second valve body 109 and the third valve body 107 to be in a closed state, and switch the operation mode of the expansion tank device from the operation and maintenance mode to the working mode.

[0086] In this embodiment, when the first operation and maintenance scheme is implemented, the first valve body 108 and the second valve body 109 are closed, and the third valve body 107 is opened, so that the medium in the rubber balloon 104 can be discharged first. Since the third valve body 107 is connected to the low-pressure area of the medium outside the equipment, a pressure difference can be formed with the medium pressure in the rubber balloon 104, and the medium in the first pipeline 105 flows out through the third valve body 107 under the action of the pressure difference; preferably, the time threshold T3 can be preset to determine that the medium in the rubber balloon 104 has been discharged, and the time threshold T3 ensures that the medium in the rubber balloon 104 is completely discharged.

[0087] After the medium in the rubber balloon 104 is exhausted, the first valve body 108 and the third valve body 107 are closed, and the second valve body 109 is opened, so that the rubber balloon 104 can be filled with the pre-input medium. Since the second valve body 109 is connected to the high-pressure medium area 112 inside the device, a pressure difference can be formed with the rubber balloon 104, and under the action of the pressure difference, the medium in the second pipeline 106 flows into the rubber balloon 104 through the second valve body 109. Preferably, the completion of the medium filling of the rubber balloon 104 can be determined by a pre-set time threshold T4. The time threshold T4 ensures that when the expansion tank is put into operation again, the rubber balloon 104 has a corresponding required medium capacity, and safety problems caused by sudden changes in the operating pressure of the inlet of the first pipeline 105 and the device are avoided. The specific values of T3 and T4 are set by the device product developers of the present application and are input into the control unit 113 with open settable modification authority or through a simple timer.

[0088] Specifically, as shown in Figure 4 the second operation and maintenance scheme can be subdivided into the following steps:

[0089] S321, control the first valve body 108 to be in a closed state, control the second valve body 109 and the third valve body 107 to be in an open state, and control the medium in the rubber balloon 104 to be discharged to the low-pressure medium area outside the device through the first interface 114, the first pipeline 105, the bypass pipeline 116 and the third valve body 107, while supplementing the medium in the rubber balloon 104 by using the high-pressure medium area 112 of the device, the second pipeline 106 and the second valve body 109;

[0090] S322, after the medium is supplemented, control the first valve body 108 to be in an open state, control the second valve body 109 and the third valve body 107 to be in a closed state, and switch the operation mode of the expansion tank device from the operation and maintenance mode to the working mode.

[0091] In the second operation and maintenance scheme, the first valve body 108 is closed, and the second valve body 109 and the third valve body 107 are opened. In this way, the medium in the rubber balloon 104 can be discharged and supplemented at the same time. The third valve body 107 is connected to the low-pressure area 111 outside the device, and a pressure difference can be formed with the medium in the rubber balloon 104. Under the action of the pressure difference, the medium in the first pipeline 105 flows out through the third valve body 107. The second valve body 109 is connected to the high-pressure area 112 inside the device, and a pressure difference can be formed with the medium in the rubber balloon 104. Under the action of the pressure difference, the medium in the second pipeline 106 flows into the rubber balloon 104 through the second valve body 109. Preferably, the time threshold T5 can be used to determine whether the medium in the rubber balloon 104 is completely discharged and supplemented. The time threshold T5 ensures that the medium in the rubber balloon 104 is completely discharged, and ensures that the rubber balloon 104 has the required medium capacity when the expansion tank is used again, and does not cause safety problems caused by sudden changes in the operating pressure of the inlet of the first pipeline 105 and the device. The specific value of the time threshold T5 is set by the device product developers of the present application, and is input into the control unit 113 and is open to modification or counted by a simple timer.

[0092] Specifically, as shown in Figure 5 the third operation and maintenance scheme can be subdivided into the following steps:

[0093] S331, performing an internal circulation operation on the expansion tank device: controlling the first valve body 108 and the second valve body 109 to be in an open state, and controlling the third valve body 107 to be in a closed state. The high-pressure area 112 of the device working medium, the second pipeline 106 and the second valve body 109 are used to supplement the medium in the rubber balloon 104, and at the same time, the medium in the rubber balloon 104 is controlled to be discharged to the low-pressure area of the device working medium through the first interface 114, the first pipeline 105 and the first valve body 108;

[0094] S332, after completing the internal circulation operation of the medium in the rubber balloon 104 and the medium in the device, controlling the first valve body 108 to be in an open state, and controlling the second valve body 109 and the third valve body 107 to be in a closed state. The operation mode of the expansion tank device is converted from the operation and maintenance mode to the working mode.

[0095] In the third operation and maintenance scheme, the third valve body 107 is closed, and the first valve body 108 and the second valve body 109 are opened, so that the circulation of the medium in the rubber balloon 104 can be realized; because the second valve body 109 accesses the high-pressure area 112 of the internal medium of the device, a pressure difference can be formed with the rubber balloon 104, and under the action of the pressure difference, the medium in the second pipeline 106 flows into the rubber balloon through the second valve body 109; after the medium flows into the rubber balloon 104, the air in the cavity interacts with the rubber balloon 104, so that the pressure of the medium in the rubber balloon 104 rises, forcing the medium in the rubber balloon 104 to flow out to the low-pressure area 111 of the working medium of the device through the first valve body 107 and the first pipeline 105, so as to form the first-in first-out of the medium in the rubber balloon 104 and the internal circulation of the medium in the rubber balloon 104 and the device.

[0096] Specifically, the control unit 113 further comprises a timing module, which is pre-designed with a timing time T; as Figure 6 As shown, the fourth operation and maintenance scheme can be subdivided into the following steps:

[0097] S341, the initial value of the timing time T of the timing module is 0, and the timing is started; when the timing time T is equal to the preset time threshold T1, the internal circulation operation is performed: the operation mode of the expansion tank device is automatically switched from the working mode to the operation and maintenance mode, the first valve body 108 and the second valve body 109 are controlled to be in the open state, the third valve body 107 is controlled to be in the closed state, the medium in the rubber balloon 104 is supplemented by using the high-pressure area 112 of the working medium of the device, the second pipeline 106 and the second valve body 109, and the medium in the rubber balloon 104 is discharged to the low-pressure area 111 of the working medium of the device through the first interface 114, the first pipeline 105 and the first valve body 108;

[0098] S342, after the internal circulation operation of the medium in the rubber balloon 104 and the medium in the device is completed, the first valve body 108 is controlled to be in the open state, the second valve body 109 and the third valve body 107 are controlled to be in the closed state, and the operation mode of the expansion tank device is converted from the operation and maintenance mode to the working mode;

[0099] S343, after the conversion to the working mode, the timing time T is reset to 0 and a new round of timing is started; when the timing time T is equal to the time threshold T1 again, the internal circulation operation is performed again.

[0100] In the embodiment, when the fourth operation and maintenance scheme is implemented, the timing time T is first timed, and when T is equal to the preset time threshold T1, the inner loop operation is started: the third valve body 107 is closed, and the first valve body 108 and the second valve body 109 are opened, so that the circulation of the medium in the rubber balloon 104 can be realized; because the second valve body 109 accesses the high-pressure area 112 of the internal medium of the device, a pressure difference can be formed with the rubber balloon 104, and under the action of the pressure difference, the medium in the second pipeline 106 flows into the rubber balloon through the second valve body 109; after the medium flows into the rubber balloon 104, the air in the cavity interacts with the rubber balloon 104, so that the pressure of the medium in the rubber balloon 104 is increased, and the medium in the rubber balloon 104 is forced to flow out to the low-pressure area 111 of the working medium of the device through the first valve body 107 and the first pipeline 105, so as to form the first-in first-out of the medium in the rubber balloon 104 and form the inner loop of the medium in the rubber balloon 104 and the medium in the device; the preset time threshold T1 can set the time interval of two operations and maintenance, and can realize the automatic operation and maintenance of the expansion tank device, and reduce the waste of manpower and material resources; the specific value of T1 is set by the device product developer of the application, and is input into the control unit 113 and is open to the setting modification authority or is timed by a simple timer.

[0101] In the embodiment, the first operation and maintenance scheme and the second operation and maintenance scheme can completely discharge the medium in the rubber balloon 104 to the outside of the system and then supplement it, which can achieve the effect of replacing all the medium; the third operation and maintenance scheme and the fourth operation and maintenance scheme can only use the medium of the device to circulate the medium in the rubber balloon 104, which plays a role of living water and prevents bacteria from breeding.

[0102] Specifically, the method further includes: determining that the inner loop operation is completed through a preset time threshold T2.

[0103] In the embodiment, the time threshold T2 can be preset to determine that the inner loop operation is completed. The continuation time threshold T2 ensures that all the medium in the rubber balloon 104 that does not flow originally flows back to the device for living water purification treatment, and the solution remaining in the rubber balloon 104 is the flowing medium in the device, and at the same time, a safety problem caused by a sudden change in the inlet operating pressure of the first pipeline 105 and the device is not caused; the specific value of T2 is set by the device product developer of the application, and is input into the control unit 113 and is open to the setting modification authority or is timed by a simple timer.

[0104] Preferably, the second valve body 109 can be connected with other medium high pressure positions in the device, ensuring that there is a pressure difference between the first pipe 105 and the second pipe 106 in the rubber balloon 104, supporting the flow of medium in the rubber balloon 104. In addition, the high pressure end of the second valve body 109 can be directly connected with the outlet end of the automatic medium supplementing system, meeting the direct supplement of external clean medium to the inside of the rubber balloon 104; this scheme needs to add a valve body at the connection between the automatic medium supplementing system and the inlet pipe of the circulating pump 110, meeting that when the active water supplementing liquid, the external clean medium cannot be supplemented into the device at the same time.

[0105] The patent provides a liquid flow expansion tank and a control method. The inflation valve of the expansion tank has a double sealing function, which can effectively eliminate the problem of micro-leakage of the first sealing of the pre-charged gas. The expansion tank supports the active water control scheme of the medium flow in the rubber balloon, which meets the flowability of the solution in the rubber balloon from the mechanism, and further eliminates the occurrence of the growth of microorganisms, the deterioration of water quality, the appearance of precipitation and the generation of acid smell and other situations in the solution in the balloon, effectively prolongs the service life of the expansion tank, and provides technical support for the safe and reliable operation of the device.

[0106] Obviously, the above embodiments of the present application are only examples for clearly illustrating the technical solutions of the present application, and are not intended to limit the specific embodiments of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the claims of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A liquid flow expansion tank device, characterized by, The expansion tank device comprises an expansion tank, a first valve body, a second valve body, a third valve body, a first pipeline, a second pipeline and a bypass pipeline; The expansion tank comprises an expansion tank body, an expansion tank air nozzle and a rubber balloon, the expansion tank air nozzle is arranged on the body wall of the expansion tank body, the expansion tank air nozzle and the expansion tank body are in a sealed state, the rubber balloon is arranged inside the expansion tank body, and a cavity is reserved between the rubber balloon and the expansion tank body; The rubber balloon is provided with a first interface and a second interface, one end of the first pipeline is connected with the first interface by penetrating the expansion tank body, and the other end of the first pipeline is used for connecting with a medium low pressure area of equipment operation; one end of the first pipeline is connected with one end of the bypass pipeline, the other end of the bypass pipeline is used for connecting with a medium low pressure area outside equipment, the third valve body is arranged on the bypass pipeline, and the third valve body is arranged outside the expansion tank body; the first valve body is arranged on the first pipeline, and the first valve body is arranged outside the expansion tank body and between the bypass pipeline and the other end of the first pipeline; One end of the second pipeline is connected with the second interface by penetrating the expansion tank body, and the second pipeline is arranged at the upper middle position of the rubber balloon extending from the second interface to the rubber balloon; the other end of the second pipeline is used for connecting with a medium high pressure area of equipment operation, and the second valve body is arranged on the second pipeline and outside the expansion tank body.

2. An expanding tank device for liquid flow according to claim 1, characterized in that The first valve body is an electromagnetic valve, an electric ball valve or a manual ball valve; The second valve body is an electromagnetic valve, an electric ball valve or a manual ball valve; The third valve body is an electromagnetic valve, an electric ball valve or a manual ball valve.

3. An expanding tank device for liquid flow according to any one of claims 1 to 2, characterized in that The expansion tank device further comprises a control unit, and the first valve body, the second valve body and the third valve body are further electrically connected with the control unit.

4. A pressure regulating device for a media region, characterized by: The pressure regulating device for regulating the pressure of the medium area connected with the liquid flow expansion tank device of any one of claims 1-3 comprises a medium low pressure area of equipment operation, a medium low pressure area outside equipment and a medium high pressure area of equipment operation, the medium low pressure area of equipment operation is connected with the other end of the first pipeline, the medium low pressure area outside equipment is connected with the other end of the bypass pipeline, and the medium high pressure area of equipment operation is connected with the other end of the second pipeline.

5. A control method of a liquid flow expansion tank device, characterized by: The control method for controlling the liquid flow expansion tank device of any one of claims 1-3 comprises: obtaining the operation mode of the expansion tank device, the operation mode comprising a working mode and a maintenance mode; if the operation mode of the expansion tank device is in the working mode, controlling the first valve body to be in an open state, and controlling the second valve body and the third valve body to be in a closed state, so that the first pipeline and the first interface are communicated through the first valve body to regulate the pressure of the medium of equipment operation; Corresponding to the operation and maintenance mode, a preset operation and maintenance scheme is provided, and if the operation mode of the expansion tank device is in the operation and maintenance mode, the operation and maintenance scheme is obtained, and the operation and maintenance of the expansion tank device is performed according to the operation and maintenance scheme.

6. The control method of a liquid flow expansion tank device according to claim 5, wherein The operation and maintenance scheme includes a first operation and maintenance scheme, and the first operation and maintenance scheme is: controlling the first valve body and the second valve body to be in a closed state, controlling the third valve body to be in an open state, and controlling the medium in the rubber balloon to be discharged to a low-pressure area outside the equipment through the first interface, the first pipeline, the bypass pipeline and the third valve body, so as to empty the medium in the rubber balloon; after the medium in the rubber balloon is emptied, the first valve body and the third valve body are controlled to be in a closed state, the second valve body is controlled to be in an open state, and the rubber balloon is supplemented with medium by using a high-pressure area of the equipment, the second pipeline and the second valve body; after the medium is supplemented, the first valve body is controlled to be in an open state, the second valve body and the third valve body are controlled to be in a closed state, and the operation mode of the expansion tank device is switched from the operation and maintenance mode to a working mode.

7. The control method of a liquid flow expansion tank device according to claim 5, wherein The operation and maintenance scheme includes a second operation and maintenance scheme, and the second operation and maintenance scheme is: controlling the first valve body to be in a closed state, controlling the second valve body and the third valve body to be in an open state, and controlling the medium in the rubber balloon to be discharged to a low-pressure area outside the equipment through the first interface, the first pipeline, the bypass pipeline and the third valve body, while supplementing the medium in the rubber balloon by using a high-pressure area of the equipment, the second pipeline and the second valve body; after the original medium in the rubber balloon is emptied and the new medium is supplemented, the first valve body is controlled to be in an open state, the second valve body and the third valve body are controlled to be in a closed state, and the operation mode of the expansion tank device is switched from the operation and maintenance mode to a working mode.

8. The control method of a liquid flow expansion tank device according to claim 5, characterized by, The operation and maintenance scheme includes a third operation and maintenance scheme, and the third operation and maintenance scheme is: performing an internal circulation operation on the expansion tank device: controlling the first valve body and the second valve body to be in an open state, controlling the third valve body to be in a closed state, supplementing the medium in the rubber balloon by using a high-pressure area of the equipment, the second pipeline and the second valve body, and controlling the medium in the rubber balloon to be discharged to a low-pressure area of the equipment working area through the first interface, the first pipeline and the first valve body; after the internal circulation operation of the medium in the rubber balloon and the medium in the equipment is completed, the first valve body is controlled to be in an open state, the second valve body and the third valve body are controlled to be in a closed state, and the operation mode of the expansion tank device is switched from the operation and maintenance mode to a working mode.

9. The control method of a liquid flow expansion tank device according to claim 5, characterized by, The operation and maintenance scheme includes a fourth operation and maintenance scheme, and the fourth operation and maintenance scheme is: The timing time T of the control timing module is initially set as 0 and starts timing, when the timing time T is equal to a preset time threshold T1, an inner loop operation is performed: the running mode of the inflation tank device is automatically switched from the working mode to the operation and maintenance mode, the first valve body and the second valve body are controlled to be in the open state, the third valve body is controlled to be in the closed state, the rubber balloon is supplemented with medium by using the high pressure area of the device working medium, the second pipeline and the second valve body, and the medium in the rubber balloon is discharged to the low pressure area of the device working medium through the first interface, the first pipeline and the first valve body; After the inner loop operation of the medium in the rubber balloon and the medium in the device is completed, the first valve body is controlled to be in the open state, the second valve body and the third valve body are controlled to be in the closed state, and the running mode of the inflation tank device is switched from the operation and maintenance mode to the working mode; After switching to the working mode, the timing time T is reset to 0 and a new round of timing starts, when the timing time T is equal to the time threshold T1 again, the inner loop operation is performed again.

10. A control method of a liquid flow expansion tank device according to any one of claims 8 to 9, characterized in that, The method further comprises: determining that the inner loop operation is completed through a preset time threshold T2.

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