Electric overflow valve and pressure control method thereof

Abstract

The invention provides an electric overflow valve and a pressure control method thereof.The electric overflow valve comprises a valve body assembly, an energy accumulator and a pressure regulating assembly, a valve cavity allowing a valve element to reciprocate is formed in the valve body assembly, a liquid inlet and a liquid return opening are formed in the valve cavity, and the valve element divides the valve cavity into a first cavity and a second cavity; the valve core reciprocates to realize different opening degrees; an energy storage cavity is formed in the energy accumulator, the pressure adjusting assembly comprises a driving device, a control part and a pressure adjusting part, the driving device is connected with the pressure adjusting part, at least one part of the pressure adjusting part is in threaded connection with the valve body assembly, one end of the pressure adjusting part communicates with the first cavity and is used for changing the pressure in the first cavity, and the control part is in signal connection with the driving device. The control device can control the driving device to move so as to maintain the pressure in the first cavity within a preset range; therefore, the pressure signal is used as an input signal to control the driving device to drive the pressure regulating part to rotate, accurate pressure control is achieved, and remote programmed pressure regulation of the overflow valve is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic components, and in particular to an electric overflow valve and a pressure control method thereof. Background Art

[0002] The overflow valve is a hydraulic system pressure regulating device, which is widely used in spray pump stations. The pressure of high-pressure water required for dust removal spray on the working surface is regulated by the overflow valve.

[0003] The pressure regulation method of the overflow valve in the prior art is manual adjustment to control the system pressure. However, this method is inconvenient to operate, the set pressure is unstable, and remote adjustment cannot be achieved, which does not meet the requirements of the development of intelligent coal mining. Summary of the invention

[0004] The main purpose of the present invention is to provide an electric relief valve and a pressure control method thereof to solve the technical problem in the prior art that the manually adjusted relief valve cannot achieve precise adjustment and remote control, which increases the burden on workers.

[0005] In order to achieve the above object, the present invention provides an electric relief valve, comprising:

[0006] A valve body assembly, wherein the valve body assembly has a valve cavity for a valve core to reciprocate, the valve cavity is provided with a liquid inlet and a liquid return port, the valve core divides the valve cavity into a first chamber and a second chamber, and the valve core reciprocates to achieve different opening degrees;

[0007] an accumulator having an energy storage chamber therein, wherein the energy storage chamber is in fluid communication with the first chamber;

[0008] A pressure regulating assembly, the pressure regulating assembly includes at least one driving device, a control unit and a pressure regulating unit, the driving device is connected to the pressure regulating unit and can drive the pressure regulating unit to rotate, at least a portion of the pressure regulating unit is threadedly connected to the valve body assembly, one end of the pressure regulating unit is communicated with the first chamber for changing the pressure inside the first chamber, the control unit is connected to the driving device signal and can control the driving device to rotate to maintain the pressure in the first chamber within a preset range.

[0009] Further, the valve body assembly includes: a main body, the valve core is located in the main body and can move back and forth in the main body, and a liquid inlet channel and a liquid return channel are formed in the main body and are respectively connected to the liquid inlet and the liquid return port; a pilot valve, the pilot valve is located on one side of the main body, and an installation portion for installing a pressure regulating portion is formed at the end of the pilot valve, and the installation portion is connected to the first chamber fluid.

[0010] Furthermore, a groove is formed at one end of the valve core close to the first chamber, a spring is arranged between the valve core and the pilot valve, one end of the spring abuts in the groove, and the other end of the spring abuts against the pilot valve.

[0011] Further, a pressure regulating chamber is formed on the pilot valve, the pressure regulating chamber constitutes a part of the first chamber, the pressure regulating chamber is connected to the accumulator, the pressure regulating part includes a first pressure regulating screw plug and a second pressure regulating screw plug, the driving device includes a first driving device and a second driving device, the first pressure regulating screw plug is connected to the first driving device, and the second pressure regulating screw plug is connected to the second driving device, the mounting part includes a first mounting part and a second mounting part, the first mounting part is connected to the pressure regulating chamber through a first pipeline, and the second mounting part is connected to the pressure regulating chamber through the second pipeline.

[0012] Furthermore, the pressure regulating part is also connected to the liquid inlet and the liquid return port, the first mounting part is connected to the liquid inlet channel through a third pipeline, and the third pipeline can be connected or disconnected with the first pipeline by controlling the first pressure regulating screw plug; the second mounting part is connected to the liquid return channel through a fourth pipeline, and the second pipeline can be connected or disconnected with the fourth pipeline by controlling the second pressure regulating screw plug.

[0013] Further, a pressure regulating chamber is formed on the pilot valve, and the pressure regulating chamber constitutes a part of the first chamber, and the pressure regulating chamber is connected to the accumulator. The mounting portion includes a first mounting portion and a second mounting portion, and the first mounting portion is connected to the pressure regulating chamber through a first pipeline, and the second mounting portion is connected to the pressure regulating chamber through the second pipeline; the pressure regulating portion includes a first pressure regulating push rod and a second pressure regulating push rod, and the driving device includes a first driving device and a second driving device, the first driving device is connected to the first pressure regulating push rod, and the connection or disconnection of the first pipeline and the pressure regulating chamber is achieved by controlling the reciprocating movement of the first pressure regulating push rod, and the second driving device is connected to the second pressure regulating push rod, and the connection or disconnection of the second pipeline and the pressure regulating chamber is achieved by controlling the reciprocating movement of the second pressure regulating push rod.

[0014] Furthermore, the valve body assembly also includes a valve seat detachably connected to the body, the valve seat is located inside the body, one end of the valve seat abuts against the body, the valve cavity is formed in the valve seat, and the valve seat has an abutment slope abutting against the valve core.

[0015] Furthermore, a first sealing portion is provided between the bushing and the body, and a second sealing portion is provided between the valve seat and the body.

[0016] Another object of the embodiments of the present disclosure is to provide a pressure control method for an electric relief valve, wherein the electric relief valve is any one of the electric relief valves described above, and a pressure detection unit is provided in the electric relief valve, and the method comprises the following steps:

[0017] Obtaining system pressure, where the pressure is the pressure at the liquid inlet or in the pressure regulating chamber;

[0018] determining an adjustment strategy of the electric relief valve based on the system pressure;

[0019] The driving device assembly is controlled based on the adjustment strategy to adjust the pressure of the first chamber.

[0020] Furthermore, determining an adjustment strategy for the electric overflow valve based on the system pressure includes: when the system pressure is lower than a first threshold, determining to increase the pressure in the first chamber; when the system pressure is higher than a second threshold, determining to reduce the pressure in the first chamber, wherein the first threshold is lower than the second threshold.

[0021] Furthermore, controlling the drive device assembly based on the adjustment strategy to adjust the pressure of the first chamber includes: when the pressure of the first chamber needs to be increased, adjusting the drive device assembly so that the first chamber is connected to the liquid inlet to increase the pressure of the first chamber; when the pressure of the first chamber needs to be reduced, adjusting the drive device assembly so that the first chamber is connected to the liquid return port to reduce the pressure of the first chamber.

[0022] Furthermore, when the pressure in the first chamber needs to be lowered, the controller sends a control signal to the second drive device, controlling the second drive device to drive the second pressure regulating screw plug to rotate, thereby connecting the second channel with the fourth channel and discharging liquid to the pilot valve, thereby reducing the pressure in the pilot valve; when the system pressure is within the set pressure range, the first pressure regulating screw plug and the second pressure regulating screw plug remain in a closed state, completing automatic pressure regulation.

[0023] The electric relief valve and pressure control method provided by the present invention are applied, by arranging a pressure detection part in a liquid inlet pipeline connected to the liquid inlet to detect the pressure at the liquid inlet, connecting with the pressure regulating part through a driving device, and the control part is connected with the pressure detection part and the driving device signal, and can control the driving device to drive the pressure regulating part to rotate, at least a part of the pressure regulating part is threadedly connected to the valve body assembly, and one end of the pressure regulating part is connected to the first chamber for changing the pressure inside the first chamber; thereby, the pressure signal is used as an input signal to control the driving device to drive the pressure regulating part to rotate, so as to realize precise control of the pressure and complete the remote programmed adjustment of the pressure of the relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A schematic structural diagram of an electric overflow valve according to the present invention is shown;

[0026] Figure 2 A flowchart showing the steps of the pressure regulating method of the electric overflow valve according to the present invention is shown;

[0027] Figure 3 A schematic structural diagram of a pressure regulating device of an electric overflow valve according to the present invention is shown.

[0028] The above drawings include the following reference numerals:

[0029] 10. Valve body assembly; 11. Main body; 111. Valve core; 112. Valve seat; 12. Pilot valve; 121. Pressure regulating chamber; 20. Accumulator; 40. Pressure regulating assembly; 41. Drive device; 42. Control unit; 43. Pressure regulating unit. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0033] In order to solve the technical problem in the prior art that the manually adjusted overflow valve cannot achieve precise adjustment and remote control, which increases the burden on workers, the present invention provides an electric overflow valve.

[0034] Figure 1 The schematic diagram of the structure of the electric overflow valve provided by the present invention is shown in FIG. Figure 1 As shown, the electric relief valve includes a valve body assembly 10 , an accumulator 20 and a pressure regulating assembly 40 .

[0035] Among them, the valve body assembly 10 has a valve cavity for the valve core 111 to reciprocate, and the valve cavity is provided with a liquid inlet and a liquid return port. The valve core divides the valve cavity into a first chamber and a second chamber. The valve core 111 reciprocates in the valve cavity to achieve different opening degrees and thus achieve different pressures; the accumulator 20 has an energy storage chamber inside, and the energy storage chamber is fluidically connected to the first chamber, so that the pressure of the first chamber can be controlled by the pressure of the energy storage chamber.

[0036] The pressure regulating assembly 40 includes at least one driving device 41, a control unit 42 and a pressure regulating unit 43. The driving device 41 is connected to the pressure regulating unit 43 and can drive the pressure regulating unit 43 to move. At least a portion of the pressure regulating unit 43 is sealed and connected to the valve body assembly 10. One end of the pressure regulating unit 43 is connected to the first chamber for changing the pressure inside the first chamber. The control unit 42 is signal-connected to the driving device 41 and can control the driving device 41 to drive the pressure regulating unit 43 to move, so as to maintain the pressure in the first chamber within a preset range.

[0037] By applying the electric overflow valve provided by the present invention, the control unit 42 can control the driving device 41 to drive the pressure regulating unit 43 to move, so that the pressure inside the first chamber can be changed by controlling the pressure regulating unit 43, thereby achieving precise control of the pressure and completing remote programmed adjustment of the overflow valve pressure.

[0038] At the same time, a pressure detection unit can be further provided in the liquid inlet pipeline connected to the liquid inlet to detect the pressure at the liquid inlet; preferably, the pressure detection unit can be provided at a position in the liquid inlet pipeline close to the liquid inlet to collect the pressure at the liquid inlet to indicate the system pressure. Setting the pressure detection unit at the liquid inlet is more convenient for the early assembly and later maintenance of the pressure detection unit.

[0039] Based on the pressure signal detected by the pressure detection unit, the drive device is controlled and then the opening of the pilot valve is controlled, forming a closed-loop pressure feedback control with high control accuracy, fast response speed and good stability.

[0040] Further, the valve body assembly 10 includes a body 11 and a pilot valve 12, wherein the valve core 111 is located in the body 11 and can reciprocate in the body 11, and a liquid inlet channel and a liquid return channel are formed in the body 11, which are respectively connected to the liquid inlet and the liquid return port, and the liquid inlet channel and the liquid return channel are used to communicate with an external pressure source; the pilot valve 12 is located on one side of the body 11 and connected to the body 11, and an installation portion for installing the pressure regulating portion 43 is formed at the end of the pilot valve 12, and the installation portion is connected to the first chamber fluid. The arrangement mode of assembling the body 11 and the pilot valve 12 after being processed separately is adopted, which is convenient for the maintenance and assembly of the overflow valve, and at the same time, it is conducive to reducing the processing cost of the product.

[0041] Specifically, a groove is formed at one end of the valve core 111 close to the first chamber, a spring is arranged between the valve core 111 and the pilot valve 12, a receiving portion is formed at the bottom of the groove, one end of the spring abuts against the groove, and the other end of the spring abuts against the pilot valve 12, so that when the valve core 111 is fully opened, the top of the valve core 111 contacts the bottom of the pilot valve, and the valve core 111 is reset by the spring; at the same time, a receiving portion is formed at the bottom of the groove, which is beneficial to improving the assembly efficiency of the product.

[0042] In one embodiment of the present invention, a pressure regulating chamber 121 is formed on the pilot valve 12, and the pressure regulating chamber 121 constitutes a part of the first chamber. The pressure regulating chamber 121 is connected to the accumulator 20, so that the pressure regulating chamber 121 can be communicated with the energy storage chamber, and the pressure of the pressure regulating chamber 121 can be adjusted by the accumulator 20. Therefore, the pressure detection part can also be arranged in the pressure regulating chamber 121 to detect the pressure in the pressure regulating chamber 121. The pressure regulating part 43 includes a first pressure regulating screw plug and a second pressure regulating screw plug, and the mounting part includes a first mounting part and a second mounting part, the first mounting part is connected to the pressure regulating chamber 121 through a first pipeline, and the second mounting part is connected to the pressure regulating chamber 121 through the second pipeline, the first pressure regulating screw plug is threadedly connected to the first mounting part, and the second pressure regulating screw plug is threadedly connected to the second mounting part.

[0043] The driving device can be, for example, a rotating driving device, such as a rotating motor, and the driving device includes a first driving device and a second driving device, the first driving device is connected to the first pressure regulating screw plug, and the connection or disconnection of the first pipeline with the pressure regulating chamber 121 is achieved by controlling the rotation of the first pressure regulating screw plug, and the second driving device is connected to the second pressure regulating screw plug, and the connection or disconnection of the second pipeline with the pressure regulating chamber is achieved by controlling the rotation of the second pressure regulating screw plug.

[0044] Among them, the first pressure regulating screw plug is connected to the first driving device, and the second pressure regulating screw plug is connected to the second driving device, so that during the operation of the relief valve, the first pressure regulating screw plug and the second pressure regulating screw plug can be controlled by controlling the rotation of the first driving device and the second driving device, and then the opening and closing control of the first pipeline is achieved by controlling the first driving device, and the opening and closing control of the second pipeline is achieved by controlling the second driving device.

[0045] In another embodiment of the present invention, the pressure regulating part 43 can also be a first pressure regulating push rod and a second pressure regulating push rod, and the driving device can be a linear driving device, such as a linear motor, and the driving device includes a first driving device and a second driving device, the first driving device is connected to the first pressure regulating push rod, and realizes the connection or disconnection of the first pipeline with the pressure regulating chamber by controlling the reciprocating movement of the first pressure regulating push rod, and the second driving device is connected to the second pressure regulating push rod, and realizes the connection or disconnection of the second pipeline with the pressure regulating chamber by controlling the reciprocating movement of the second pressure regulating push rod.

[0046] In order to facilitate the regulation of the pressure in the pressure regulating chamber 121 , the pressure regulating portion 43 is also connected to the liquid inlet and the liquid return port, thereby providing the pressure regulating chamber 121 with a high pressure source and a low pressure source required for pressure regulation.

[0047] Specifically, the first installation part is connected to the liquid inlet channel through the third pipeline, and the connection or disconnection of the third pipeline with the first pipeline can be achieved by controlling the first pressure regulating screw plug; the second installation part is connected to the liquid return channel through the fourth pipeline, and the connection or disconnection of the second pipeline with the fourth pipeline can be achieved by controlling the second pressure regulating screw plug. By setting the third pipeline and the fourth pipeline, the pressure regulating chamber 121 is connected to the high pressure source of the liquid inlet channel through the first pipeline and the third pipeline, and is connected to the low pressure source of the liquid return channel through the second pipeline and the fourth pipeline.

[0048] Furthermore, since the first drive device and the second drive device are connected to the control unit signal, the first drive device and the second drive device can be remotely controlled to achieve remote control of the connection or closure of the first pipeline with the third pipeline, the second pipeline and the fourth pipeline.

[0049] In order to improve the service life of the product, the mounting part is threadedly connected to the pressure regulating part 43 through a wire thread sleeve. Specifically, the first pressure regulating screw plug and the second pressure regulating screw plug are threadedly connected to the first mounting part and the second mounting part through wire thread sleeves respectively. Therefore, during use, the thread can be replaced by replacing the wire thread sleeve, which can avoid equipment damage caused by sticking and is beneficial to reducing the maintenance cost of the product during use.

[0050] Furthermore, the pressure detection unit is a pressure sensor, and the pressure sensor may be, for example, a piezoelectric pressure sensor, a ceramic pressure sensor, or a strain gauge pressure sensor.

[0051] In another specific embodiment of the present invention, the main body 11 includes a valve seat and a sleeve located in the valve cavity, one end of the valve seat 112 abuts against the inner side of the valve cavity, and the valve seat 112 has an abutting inclined surface abutting against the valve core 111. Under the initial working condition, the valve core 111 is pressed against the valve seat 112 under the elastic force of the spring, and the sealing between the liquid inlet channel and the liquid return channel is achieved by the abutting inclined surface; the sleeve is located on the side of the valve cavity close to the pilot valve 12, and the valve core 111 is located in the sleeve and reciprocates along the inner wall of the sleeve, so that the sleeve forms the movement path of the valve core 111.

[0052] In order to improve the sealing effect, a first sealing portion is further provided between the bushing and the body 11, and a second sealing portion is provided between the valve seat 112 and the body 11, wherein the first sealing portion and the second sealing portion are sealing rings, and the sealing rings are preferably rubber sealing rings. Such a setting is conducive to improving the sealing effect inside the overflow valve.

[0053] The electric overflow valve provided by the present invention is applied by setting a pressure detection unit in the liquid inlet pipeline connected to the liquid inlet, and connecting the pressure detection unit with the control unit 42 signal, so that the control unit 42 can control the driving device 41 to drive the pressure regulating unit 43 to rotate based on the pressure detection unit, thereby controlling the pressure regulating unit 43 to change the pressure inside the first chamber, achieving precise control of the pressure, and completing the remote programmed adjustment of the overflow valve; at the same time, the driving device is controlled based on the pressure signal detected by the pressure detection unit to control the opening of the pilot valve, forming a closed-loop pressure feedback control with high control accuracy, fast response speed and good stability.

[0054] Another object of the embodiment of the present disclosure is to provide a pressure control method for an electric relief valve, wherein the electric relief valve is any one of the electric relief valves described above, Figure 2 FIG. 4 shows a flow chart of the steps of the pressure regulating method of the electric overflow valve according to the present invention, as shown in FIG. Figure 2 As shown, the method comprises the following steps:

[0055] S101, obtaining the system pressure, where the pressure is the pressure at the liquid inlet.

[0056] In this step, the system pressure is obtained, and the pressure is the pressure at the liquid inlet.

[0057] Specifically, the control unit 42 obtains the pressure at the liquid inlet through the pressure detection unit, and uses the pressure at the liquid inlet to indicate the system pressure.

[0058] Of course, a pressure detection unit may also be provided in the pressure regulating chamber or the first chamber, and the pressure in the pressure regulating chamber or the first chamber may be used as the control pressure of the system.

[0059] S102: Determine an adjustment strategy of the electric relief valve based on the system pressure.

[0060] After completing the above step S101, in this step, the adjustment strategy of the electric relief valve is determined based on the system pressure.

[0061] Specifically, the adjustment strategy of the electric overflow valve is determined based on the system pressure, including increasing the pressure in the first chamber when the system pressure is lower than a first threshold value; and reducing the pressure in the first chamber when the system pressure is higher than a second threshold value, so that the pressure in the first chamber is maintained between the first threshold value and the second threshold value, wherein the first threshold value is lower than the second threshold value.

[0062] The first threshold and the second threshold are adjustment thresholds preset by the staff according to actual needs, and the pressure regulating range of the relief valve is formed between the first threshold and the second threshold.

[0063] S103, controlling the driving device assembly based on the adjustment strategy to adjust the pressure of the first chamber.

[0064] After completing the above step S102, in this step, the driving device assembly is controlled based on the adjustment strategy to adjust the pressure of the first chamber.

[0065] Furthermore, controlling the drive device assembly based on the adjustment strategy to adjust the pressure of the first chamber includes adjusting the drive device assembly so that the first chamber is connected to the liquid inlet to increase the pressure of the first chamber when the pressure of the first chamber needs to be increased; and adjusting the drive device assembly so that the first chamber is connected to the liquid return port to reduce the pressure of the first chamber when the pressure of the first chamber needs to be reduced.

[0066] Specifically, when the pressure in the first chamber needs to be increased, the controller sends a control signal to the first drive device, controlling the first drive device to drive the first pressure regulating screw plug to rotate, thereby connecting the first channel with the third channel, discharging liquid into the pilot valve, and increasing the pressure in the pilot valve; preferably, an intermittent adjustment method is used to adjust the pressure during the control process, that is, after the first pressure regulating screw plug connects the first channel and the third channel, it opens the channel for a preset time and then closes the channel.

[0067] When the pressure in the first chamber needs to be reduced, the controller sends a control signal to the second drive device to control the second drive device to drive the second pressure regulating screw plug to rotate, thereby connecting the second channel with the fourth channel and discharging liquid to the pilot valve to reduce the pressure of the pilot valve.

[0068] When the system pressure is within the set pressure range, the first pressure regulating screw plug and the second pressure regulating screw plug remain in a closed state, completing automatic pressure regulation.

[0069] By using the pressure regulating method of the electric relief valve provided by the present invention, when the system pressure drops below the first threshold after the relief valve has been running for a long time, the pressure increasing action is triggered to realize the automatic pressure replenishment function of the system. At the same time, the manual control option is retained, and the action of the electric device can be manually controlled to complete manual pressure regulation, so that the electric pressure regulating valve provided by the present invention has the functions of remote automatic pressure regulation, automatic pressure replenishment and manual pressure regulation.

[0070] Based on the same inventive concept, the third embodiment of the present disclosure provides a pressure control device for an electric relief valve, which can be integrated into an electronic device. Figure 3 As shown, the control device 200 includes: an acquisition module 210, a driving module 220 and a control module 2, which are specifically as follows:

[0071] An acquisition module 210, the acquisition module 210 is used to acquire the system pressure, the pressure being the pressure at the liquid inlet or in the pressure regulating chamber;

[0072] A determination module 220, wherein the determination module 220 determines an adjustment strategy of the electric relief valve based on the system pressure;

[0073] A control module 2, wherein the control module 2 controls the driving device component based on the adjustment strategy to adjust the pressure of the first chamber.

[0074] Accordingly, a fourth embodiment of the present disclosure provides a storage medium, which is a computer-readable medium and stores a computer program. When the computer program is executed by a processor, the method provided by the first embodiment of the present disclosure is implemented, including the following steps S11 to S13:

[0075] S11, obtaining the system pressure, where the pressure is the pressure at the liquid inlet or in the pressure regulating chamber;

[0076] S12, determining an adjustment strategy of the electric relief valve based on the system pressure;

[0077] S13, controlling the driving device assembly based on the adjustment strategy to adjust the pressure of the first chamber.

[0078] Furthermore, when the computer program is executed by a processor, other methods provided in the second embodiment of the present disclosure are implemented.

[0079] By using the pressure regulating method and pressure regulating device of the electric relief valve provided by the present invention, when the system pressure drops below the first threshold after the relief valve has been running for a long time, the pressure increasing action is triggered to realize the automatic pressure replenishment function of the system. At the same time, the manual control option is retained, and the action of the electric device can be manually controlled to complete manual pressure regulation, so that the electric pressure regulating valve provided by the present invention has the functions of remote automatic pressure regulation, automatic pressure replenishment and manual pressure regulation.

[0080] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0081] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0084] The storage medium may be included in the electronic device, or may exist independently without being installed in the electronic device.

[0085] The storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: obtains at least two Internet Protocol addresses; sends a node evaluation request including at least two Internet Protocol addresses to a node evaluation device, wherein the node evaluation device selects an Internet Protocol address from the at least two Internet Protocol addresses and returns it; receives the Internet Protocol address returned by the node evaluation device; wherein the obtained Internet Protocol address indicates an edge node in a content distribution network.

[0086] Alternatively, the storage medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device: receives a node evaluation request including at least two Internet Protocol addresses; selects an Internet Protocol address from the at least two Internet Protocol addresses; and returns the selected Internet Protocol address; wherein the received Internet Protocol address indicates an edge node in a content distribution network.

[0087] Computer program code for performing operations of the present disclosure may be written in one or more programming languages ​​or combinations thereof, including, but not limited to, object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the passenger computer, partially on the passenger computer, as a stand-alone software package, partially on the passenger computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the passenger computer via any type of network, including, for example, a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0088] It should be noted that the storage medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any storage medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0089] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0090] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0091] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0092] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0093] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0094] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0095] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0096] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection required by the present disclosure.

Claims

1. An electric relief valve, characterized in that: include: A valve body assembly (10), wherein the valve body assembly (10) has a valve cavity for a valve core (111) to reciprocate, the valve cavity is provided with a liquid inlet and a liquid return port, the valve core (111) divides the valve cavity into a first chamber and a second chamber, and the valve core (111) reciprocates to achieve different opening degrees; An accumulator (20) having an energy storage chamber therein, wherein the energy storage chamber is in fluid communication with the first chamber; A pressure regulating assembly (40), the pressure regulating assembly (40) comprising at least one driving device (41), a control unit (42) and a pressure regulating unit (43), the driving device (41) being connected to the pressure regulating unit (43) and being capable of driving the pressure regulating unit (43) to move, at least a portion of the pressure regulating unit (43) being sealedly connected to the valve body assembly (10), one end of the pressure regulating unit (43) being connected to the first chamber for changing the pressure inside the first chamber, the control unit being connected to the driving device signal and being capable of controlling the driving device to rotate so as to maintain the pressure inside the first chamber within a preset range.

2. The electric relief valve according to claim 1, characterized in that: The valve body assembly (10) comprises: A body (11), the valve core (111) is located in the body (11) and is capable of reciprocating in the body (11), and a liquid inlet channel and a liquid return channel are formed in the body (11) and are respectively connected to the liquid inlet and the liquid return port; A pilot valve (12), the pilot valve (12) is located at one side of the body (11), and an end of the pilot valve (12) is formed with a mounting portion for mounting a pressure regulating portion (43), and the mounting portion is fluidically connected to the first chamber.

3. The electric relief valve according to claim 2, characterized in that: A groove is formed at one end of the valve core (111) close to the first chamber, and a spring is arranged between the valve core (111) and the pilot valve (12). One end of the spring abuts in the groove, and the other end of the spring abuts against the pilot valve (12).

4. The electric relief valve according to claim 2, characterized in that: A pressure regulating chamber (121) is formed on the pilot valve (12), and the pressure regulating chamber (121) constitutes a part of the first chamber. The pressure regulating chamber (121) is connected to the accumulator (20). The mounting portion includes a first mounting portion and a second mounting portion. The first mounting portion is connected to the pressure regulating chamber (121) via a first pipeline, and the second mounting portion is connected to the pressure regulating chamber (121) via a second pipeline. The pressure regulating portion (43) includes a first pressure regulating screw plug and a second pressure regulating screw plug. The driving device includes a first driving device and a second driving device. The first driving device is connected to the first pressure regulating screw plug, and the first pipeline is connected to or disconnected from the pressure regulating chamber (121) by controlling the rotation of the first pressure regulating screw plug. The second driving device is connected to the second pressure regulating screw plug, and the second pipeline is connected to or disconnected from the pressure regulating chamber by controlling the rotation of the second pressure regulating screw plug.

5. The electric relief valve according to claim 4, characterized in that: The pressure regulating part (43) is also connected to the liquid inlet and the liquid return port; the first mounting part is connected to the liquid inlet channel via a third pipeline, and the third pipeline can be connected or disconnected with the first pipeline by controlling the first pressure regulating screw plug; the second mounting part is connected to the liquid return channel via a fourth pipeline, and the second pipeline can be connected or disconnected with the fourth pipeline by controlling the second pressure regulating screw plug.

6. The electric relief valve according to claim 2, characterized in that: A pressure regulating chamber (121) is formed on the pilot valve (12), and the pressure regulating chamber (121) constitutes a part of the first chamber. The pressure regulating chamber (121) is connected to the accumulator (20). The mounting portion includes a first mounting portion and a second mounting portion. The first mounting portion is connected to the pressure regulating chamber (121) through a first pipeline, and the second mounting portion is connected to the pressure regulating chamber (121) through a second pipeline. The pressure regulating portion (43) includes a first pressure regulating push rod and a second pressure regulating push rod. The driving device includes a first driving device and a second driving device. The first driving device is connected to the first pressure regulating push rod, and the first pipeline is connected to or disconnected from the pressure regulating chamber (121) by controlling the reciprocating movement of the first pressure regulating push rod. The second driving device is connected to the second pressure regulating push rod, and the second pipeline is connected to or disconnected from the pressure regulating chamber by controlling the reciprocating movement of the second pressure regulating push rod.

7. The electric relief valve according to claim 2, characterized in that: The valve body assembly also includes a valve seat (112) detachably connected to the main body, the valve seat (112) is located inside the main body, one end of the valve seat (112) abuts against the inner side of the main body, the valve cavity is formed in the valve seat (112), and the valve seat (112) has an abutting inclined surface abutting against the valve core (111).

8. A pressure control method for an electric relief valve, wherein: The electric overflow valve is the electric overflow valve according to any one of claims 1 to 7, wherein a pressure detection unit is provided in the electric overflow valve, and the method comprises the following steps: Obtaining system pressure, where the pressure is the pressure at the liquid inlet or in the pressure regulating chamber; determining an adjustment strategy of the electric relief valve based on the system pressure; The driving device assembly is controlled based on the adjustment strategy to adjust the pressure of the first chamber.

9. The pressure control method according to claim 8, characterized in that: Determining an adjustment strategy of the electric relief valve based on the system pressure includes: When the system pressure is lower than a first threshold, determining to increase the pressure in the first chamber; When the system pressure is higher than a second threshold, it is determined to reduce the pressure in the first chamber, wherein the first threshold is lower than the second threshold.

10. The pressure control method according to claim 8, characterized in that: When the pressure of the first chamber needs to be increased, adjusting the drive device assembly so that the first chamber is connected to the liquid inlet to increase the pressure of the first chamber; When the pressure of the first chamber needs to be reduced, the drive device assembly is adjusted so that the first chamber is connected to the liquid return port to reduce the pressure of the first chamber.

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