A cooling water flow control system and method for a diaphragm compressor

Abstract

This disclosure proposes a cooling water flow control system and method for a diaphragm compressor. In this system, each cylinder cooling water flow control device collects the exhaust temperature of its corresponding cylinder component and adjusts the water flow rate of the branch inlet pipe in the corresponding branch water pipe group based on a first command. Each cooler cooling water flow control device collects the exhaust temperature of its corresponding cooler and adjusts the water flow rate of the branch inlet pipe in the corresponding branch water pipe group based on a second command. An inlet water control device is arranged on the main inlet pipe and adjusts the total inlet water flow rate to a target total inlet water flow rate based on a third command. A central control device obtains the corresponding cooling water flow reduction amount based on the exhaust temperature of all cylinder components, the corresponding first set exhaust temperature, the exhaust temperature of all coolers, and the corresponding second set exhaust temperature to generate a first command and a second command; then, a third command is generated based on the minimum reduction amount. The system of this disclosure reduces the cooling water flow of the diaphragm compressor.

Description

Technical Field

[0001] This disclosure relates to the field of diaphragm compressor equipment technology, and in particular to a cooling water volume control system and method for a diaphragm compressor. Background Technology

[0002] With the advancement of science and technology and the continuous improvement of people's living standards, diaphragm compressors, as an irreplaceable type of positive displacement compressor, are finding increasingly wider applications. For example, diaphragm compressors are used in nuclear power, food and pharmaceuticals, petrochemicals, electronics, materials, defense, and scientific experiments.

[0003] The working process of a diaphragm compressor is to compress low-pressure gas into high-pressure gas. During the process, the gas pressure increases and the gas temperature also rises significantly. Therefore, the cooling system is an important part of the diaphragm compressor system.

[0004] Currently, the common cooling method for diaphragm compressors is water cooling. Effective control of the cooling water volume can reduce costs and protect water resources. However, the existing cooling systems consume a large amount of cooling water, and there is still room for improvement in water conservation. Summary of the Invention

[0005] This disclosure aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, this disclosure provides a cooling water volume control system and method for diaphragm compressors to reduce the cooling water volume of diaphragm compressors, thereby reducing costs and saving water resources.

[0007] The first aspect of this disclosure provides a cooling water volume control system for a diaphragm compressor. The diaphragm compressor includes at least one cylinder component, at least one cooler, and cooling water pipes. The cooling water pipes include a main water pipe and multiple sets of branch water pipes. The main water pipe includes a main inlet water pipe and a main outlet water pipe. Each set of branch water pipes includes a branch inlet water pipe and a branch outlet water pipe. Each cylinder component and each cooler are connected to the main water pipe via a separate set of branch water pipes. The cooling water volume control system includes a cylinder cooling water volume control device, a cooler cooling water volume control device, an inlet water control device, and a main control device.

[0008] Each cylinder block component is equipped with a separate cylinder block cooling water volume control device. Each cylinder block cooling water volume control device is used to collect the exhaust temperature of the corresponding cylinder block component and adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of the cylinder block component based on the first command.

[0009] Each cooler is equipped with a separate cooler cooling water flow control device. Each cooler cooling water flow control device is used to collect the exhaust temperature of the corresponding cooler and adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes based on the second command.

[0010] The water inlet control device is arranged on the main water inlet pipe, and the water inlet control device is used to adjust the total water inlet flow to the target total water inlet flow based on a third command;

[0011] The central control device is used to generate a first instruction by obtaining the corresponding reduction in cylinder coolant volume based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature; it is also used to generate a second instruction by obtaining the corresponding reduction in coolant volume based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature; and it is also used to obtain the minimum reduction value based on the reduction in coolant volume of all cylinder components and the reduction in coolant volume of all coolers, and generate a third instruction based on a preset multiple of the minimum reduction value.

[0012] In the cooling water volume control system for a diaphragm compressor provided in the first aspect of this disclosure, each cylinder cooling water volume control device includes a cylinder thermometer and a cylinder electric regulating valve arranged in the branch water inlet pipe of the corresponding group of branch water pipes; each cooler cooling water volume control device includes a cooler thermometer and a cooler electric regulating valve arranged in the branch water inlet pipe of the corresponding group of branch water pipes, and the water inlet control device includes a main water inlet pipe electric regulating valve.

[0013] In the cooling water flow control system for a diaphragm compressor provided in the first aspect of this disclosure, the water inlet control device further includes a main water inlet pipe flow meter, which collects the total water inlet flow of the main water inlet pipe.

[0014] In the cooling water flow control system for a diaphragm compressor provided in the first aspect of this disclosure, the cooling water flow control system further includes an outlet water monitoring device, which includes a main outlet water pipe flow meter arranged on the main outlet water pipe, and the main outlet water pipe flow meter is used to collect the total outlet water flow of the main outlet water pipe.

[0015] In the cooling water volume control system for a diaphragm compressor provided in the first aspect of this disclosure, the main control device is specifically used for: calculating the exhaust temperature of each cylinder component and the corresponding first set exhaust temperature to obtain the corresponding cylinder exhaust temperature difference; calculating the corresponding cylinder cooling water volume reduction based on the cylinder exhaust temperature difference to generate a corresponding first instruction; calculating the exhaust temperature of each cooler and the corresponding second set exhaust temperature to obtain the corresponding cooler exhaust temperature difference; calculating the corresponding cooler cooling water volume reduction based on the cooler exhaust temperature difference to generate a corresponding second instruction.

[0016] In the cooling water volume control system for a diaphragm compressor provided in the first aspect of this disclosure, the main control device is specifically used to: filter the minimum reduction value from the reduction amount of cooling water volume of all cylinders and the reduction amount of cooling water volume of all coolers; obtain the total number of cylinder components and coolers, and use the total number as a preset multiple; determine the total reduction amount of cooling water volume of the main inlet pipe based on the preset multiple of the minimum reduction value to generate a third instruction.

[0017] A second aspect of this disclosure provides a cooling water volume control method for a diaphragm compressor employing the cooling water volume control system for a diaphragm compressor described in the first aspect, comprising:

[0018] Obtain the exhaust temperature of all cylinder block components and the exhaust temperature of all coolers;

[0019] Based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature, the corresponding cylinder cooling water reduction amount is obtained to generate the corresponding first instruction. The first instruction is used to adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of each cylinder component.

[0020] Based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature, the corresponding cooler cooling water volume reduction is obtained to generate the corresponding second instruction. The second instruction is used to adjust the water flow rate of the branch inlet pipe in the corresponding group of branch water pipes of each cooler.

[0021] The minimum reduction value is obtained based on the reduction of cooling water volume in all cylinder blocks and all coolers. A third instruction is generated based on a preset multiple of the minimum reduction value. The third instruction is used to adjust the total water inlet flow rate to the target total water inlet flow rate.

[0022] In the cooling water volume control method for a diaphragm compressor provided in the second aspect of this disclosure, the step of obtaining the corresponding cylinder cooling water volume reduction amount based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature to generate the corresponding first instruction includes: calculating the exhaust temperature of each cylinder component and the corresponding first set exhaust temperature to obtain the corresponding cylinder exhaust temperature difference, and calculating the corresponding cylinder cooling water volume reduction amount based on the exhaust temperature difference of each cylinder to generate the corresponding first instruction.

[0023] In the cooling water volume control method for a diaphragm compressor provided in the second aspect of this disclosure, the step of obtaining the corresponding cooling water volume reduction amount based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature to generate the corresponding second instruction includes: calculating the exhaust temperature of each cooler and the corresponding second set exhaust temperature to obtain the corresponding cooler exhaust temperature difference, and calculating the corresponding cooling water volume reduction amount based on the cooler body exhaust temperature difference to generate the corresponding second instruction.

[0024] In the cooling water volume control method for a diaphragm compressor provided in the second aspect of this disclosure, the step of obtaining a minimum reduction value based on the reduction amount of cooling water volume in all cylinder blocks and the reduction amount of cooling water volume in all coolers, and generating a third instruction based on a preset multiple of the minimum reduction value, includes: filtering to obtain a minimum reduction value from the reduction amounts of cooling water volume in all cylinder blocks and the reduction amounts of cooling water volume in all coolers; obtaining the total number of cylinder block components and coolers, and using the total number as a preset multiple; determining the total reduction amount of cooling water volume in the main inlet pipe based on the preset multiple of the minimum reduction value to generate the third instruction.

[0025] In one or more aspects of this disclosure, a diaphragm compressor includes at least one cylinder block component, at least one cooler, and cooling water pipes. The cooling water pipes include a main water pipe and multiple sets of branch water pipes. The main water pipe includes a main inlet pipe and a main outlet pipe. Each set of branch water pipes includes a branch inlet pipe and a branch outlet pipe. Each cylinder block component and each cooler are connected to the main water pipe via a separate set of branch water pipes. The cooling water flow control system includes a cylinder block cooling water flow control device, a cooler cooling water flow control device, an inlet water control device, and a main control device. Each cylinder block component is equipped with a separate cylinder block cooling water flow control device, which is used to collect the exhaust temperature of the corresponding cylinder block component and adjust the water flow rate of the branch inlet pipe in the corresponding set of branch water pipes of that cylinder block component based on a first command. Each cooler is equipped with a separate cooler. The cooling water flow control device includes a cooling water flow control device for each cooler, which collects the exhaust temperature of the corresponding cooler and adjusts the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of the cooler based on a second command; the water inlet control device is arranged on the main water inlet pipe and is used to adjust the total water inlet flow rate to the target total water inlet flow rate based on a third command; the main control device is used to obtain the corresponding cylinder block cooling water flow reduction amount based on the exhaust temperature of all cylinder block components and the corresponding first set exhaust temperature to generate a first command; it is also used to obtain the corresponding cooler cooling water flow reduction amount based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature to generate a second command; it is also used to obtain the minimum reduction amount based on the reduction amount of all cylinder block cooling water flow rate and the reduction amount of all cooler cooling water flow rate, and generate a third command based on a preset multiple of the minimum reduction amount. In this case, the corresponding reduction in cylinder cooling water volume is determined based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature, and the corresponding reduction in cooler cooling water volume is determined based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature; the total inlet flow rate is determined based on the minimum reduction in cooling water volume of all cylinder components and all coolers, which more accurately controls the cooling water volume, thereby reducing the cooling water volume of the diaphragm compressor and achieving the goal of reducing costs and saving water resources.

[0026] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0028] Figure 1 This diagram illustrates a cooling water volume control system for a diaphragm compressor according to an embodiment of the present disclosure.

[0029] Figure 2 This diagram illustrates a connection schematic of a cooling water flow control system for a diaphragm compressor according to an embodiment of the present disclosure.

[0030] Figure 3 This diagram illustrates the data flow provided in an embodiment of the present disclosure.

[0031] Figure 4 A flowchart illustrating a cooling water volume control method for a diaphragm compressor provided in an embodiment of this disclosure is shown. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this disclosure as detailed in the appended claims.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. It should also be understood that the term "and / or" as used in this disclosure refers to and includes any or all possible combinations of one or more associated listed items.

[0035] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0036] This disclosure provides a cooling water volume control system and method for a diaphragm compressor, which reduces the cooling water volume of the diaphragm compressor, thereby reducing costs and saving water resources.

[0037] In this disclosure, the diaphragm compressor includes at least one cylinder block component and at least one cooler. Generally, a diaphragm compressor has one to four cylinder block components and one to three coolers, but the number of cylinder block components and coolers in this disclosure is not limited to these.

[0038] In this disclosure, the diaphragm compressor includes cooling water pipes. Cooling water is transported in the cooling water pipes to cool the cylinder block components and the cooler. Specifically, the cooling water pipes include a main water pipe and multiple sets of branch water pipes. The main water pipe includes a main inlet pipe and a main outlet pipe. Each set of branch water pipes includes a branch inlet pipe and a branch outlet pipe. Each cylinder block component and each cooler is connected to the main water pipe via a separate set of branch water pipes.

[0039] Specifically, each cylinder block component is connected to the main inlet pipe of the main water pipe via a branch inlet pipe of its corresponding separate set of branch water pipes. Each cylinder block component is connected to the main outlet pipe of the main water pipe via a branch outlet pipe of its corresponding separate set of branch water pipes. Each cooler is connected to the main inlet pipe of the main water pipe via a branch inlet pipe of its corresponding separate set of branch water pipes. Each cooler is connected to the main outlet pipe of the main water pipe via a branch outlet pipe of its corresponding separate set of branch water pipes.

[0040] The main inlet pipe is connected in parallel to branch inlet pipes for the cylinder block and coolers via fittings. Similarly, the branch outlet pipes for the cylinder block and coolers are connected in parallel to the main outlet pipe via fittings. In other words, the main inlet pipe connects to the branch inlet pipes of each cylinder block and cooler via multiple fittings. Similarly, the main outlet pipe connects to the branch outlet pipes of each cylinder block and cooler via multiple fittings.

[0041] In the first embodiment, Figure 1 This diagram illustrates a block diagram of a cooling water volume control system for a diaphragm compressor, as provided in an embodiment of this disclosure. Figure 2 This diagram illustrates a connection schematic of a cooling water flow control system for a diaphragm compressor according to an embodiment of the present disclosure. Figure 3 This illustrates a data flow diagram provided in an embodiment of the present disclosure. For example... Figure 1 As shown, the cooling water control system for the diaphragm compressor includes a cylinder cooling water control device, a cooler cooling water control device, a water inlet control device, and a main control device.

[0042] In this embodiment, each cylinder block component is equipped with a separate cylinder block coolant flow control device. The cylinder block coolant flow control device is connected to the main control device.

[0043] In this embodiment, the cooling water volume control device for each cylinder block is used to collect the exhaust temperature of the corresponding cylinder block component and adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of the cylinder block component based on the first command.

[0044] Specifically, the cooling water flow control device for each cylinder block includes a cylinder block thermometer and an electrically operated cylinder block regulating valve arranged in the branch inlet pipe of the corresponding group of branch water pipes. The cylinder block thermometer is arranged on the exhaust pipe at the exhaust port of the cylinder block component to collect the exhaust temperature of the corresponding cylinder block component. The electrically operated cylinder block regulating valve is connected to the main control unit, and receives a first command from the main control unit to change its opening size to regulate the water flow in the branch inlet pipe of the corresponding group of branch water pipes for that cylinder block component.

[0045] In this embodiment, the cooling water flow control device for each cylinder block also includes a cylinder block temperature transmitter. The cylinder block temperature transmitter is connected to both the cylinder block thermometer and the main control unit. The exhaust temperature collected by the cylinder block thermometer is processed by the cylinder block temperature transmitter and then sent to the main control unit.

[0046] In this embodiment, each cooler is equipped with a separate cooler cooling water flow control device. The cooler cooling water flow control device is connected to the central control device.

[0047] In this embodiment, the cooling water flow control device for each cooler is used to collect the exhaust temperature of the corresponding cooler and adjust the water flow rate of the branch inlet pipe in the corresponding group of branch water pipes of the cooler based on the second command.

[0048] Specifically, each cooler's cooling water flow control device includes a cooler thermometer and a cooler electric regulating valve arranged in the branch inlet pipe of the corresponding group of branch water pipes. The cooler thermometer is arranged on the exhaust pipe at the cooler's exhaust port to collect the exhaust temperature of the corresponding cooler. The cooler electric regulating valve is connected to the main control device, and receives a second command from the main control device to change its opening size to regulate the water flow in the branch inlet pipe of the corresponding group of branch water pipes for that cooler.

[0049] In this embodiment, the cooling water flow control device for each cooler also includes a cooler temperature transmitter. The cooler temperature transmitter is connected to both the cooler thermometer and the main control device. The exhaust temperature collected by the cooler thermometer is processed by the cooler temperature transmitter and then sent to the main control device.

[0050] Taking two cylinder block components and two coolers as an example, such as Figure 2 As shown, the diaphragm compressor includes a primary cylinder block assembly, a primary cooler, a secondary cylinder block assembly, and a secondary cooler, which are connected sequentially. The exhaust gas from the primary cylinder block assembly passes through the primary cooler, the secondary cylinder block assembly, and the secondary cooler before being discharged. Specifically, after the diaphragm compressor is started, the gas to be compressed enters the primary cylinder block assembly through its intake pipe. The high-pressure, high-temperature gas discharged through the primary cylinder block assembly's exhaust pipe enters the primary cooler through a gas pipe. The gas cooled by the primary cooler enters the secondary cylinder block assembly through a pipe. The high-pressure, high-temperature gas discharged through the secondary cylinder block assembly's exhaust pipe has a pressure and temperature higher than the gas discharged from the primary cylinder block assembly. This high-pressure, high-temperature gas then enters the secondary cooler through a gas pipe and is cooled by the secondary cooler before being discharged.

[0051] like Figure 2 As shown, the main water inlet pipe connects to the branch water inlet pipes of the two cylinder block components and the two coolers via four fittings. The main water outlet pipe connects to the branch water outlet pipes of the two cylinder block components and the two coolers via four fittings. Throughout the process, cooling water enters from the main water inlet pipe and flows to the cylinder block components and cooler components to cool them.

[0052] The cooling water volume control system includes two cylinder block cooling water volume control devices and two cooler cooling water volume control devices. For example... Figure 2As shown, the first cylinder block coolant flow control device configured in the first-stage cylinder block assembly includes a first-stage cylinder block thermometer, a first-stage cylinder block temperature transmitter, and a first-stage cylinder block electric regulating valve. The first cooler coolant flow control device configured in the first-stage cooler includes a first-stage cooler thermometer, a first-stage cooler temperature transmitter, and a first-stage cooler electric regulating valve. The second cylinder block coolant flow control device configured in the second-stage cylinder block assembly includes a second-stage cylinder block thermometer, a second-stage cylinder block temperature transmitter, and a second-stage cylinder block electric regulating valve. The second cooler coolant flow control device configured in the second-stage cooler includes a second-stage cooler thermometer, a second-stage cooler temperature transmitter, and a second-stage cooler electric regulating valve.

[0053] In the first cylinder block cooling water volume control device, a primary cylinder block thermometer and a primary cylinder block temperature transmitter are installed at the exhaust pipe of the primary cylinder block component to monitor the exhaust temperature of the primary cylinder block component in real time. The primary cylinder block thermometer allows for direct observation of the cylinder block exhaust pipe temperature. The primary cylinder block temperature transmitter is connected to the control components of the main control device (described later) via electrical signals, and can send the monitored exhaust temperature of the primary cylinder block component to the control components of the main control device in real time. A primary cylinder block electric regulating valve is installed in series on the branch water inlet pipe of the primary cylinder block component. The primary cylinder block electric regulating valve controls the valve opening through the electrical signal (i.e., the first command) from the control components of the main control device, thereby controlling the water flow rate of the branch water inlet pipe of the primary cylinder block component. The second cylinder block cooling water volume control device can be analogous to the first cylinder block cooling water volume control device.

[0054] In the first cooler cooling water flow control device, a first-stage cooler thermometer and a first-stage cooler temperature transmitter are installed at the exhaust pipe of the first-stage cooler to monitor the exhaust temperature in real time. The first-stage cooler thermometer allows for direct observation of the exhaust pipe temperature. The first-stage cooler temperature transmitter is connected to the control components of the main control device via electrical signals, transmitting the monitored exhaust temperature to the main control device in real time. A first-stage cooler electric regulating valve is connected in series on a branch inlet pipe of the first-stage cooler. The valve opening is controlled by electrical signals (i.e., the second control command) from the control components of the main control device, thereby controlling the water flow rate in the inlet pipe. The second cooler cooling water flow control device can be analogous to the first cooler cooling water flow control device.

[0055] In this embodiment, the water inlet control device is arranged on the main water inlet pipe. The water inlet control device is connected to the main control device.

[0056] In this embodiment, the water inlet control device is used to adjust the total water inlet flow rate to the target total water inlet flow rate based on a third command.

[0057] Specifically, the water inlet control device includes a main inlet pipe electric regulating valve. The main inlet pipe electric regulating valve is connected in series at the inlet of the main inlet pipe (see...). Figure 2 The main inlet pipe electric regulating valve is connected to the main control device in the form of an electrical signal. The main inlet pipe electric regulating valve receives a third command from the main control device to change its opening size to regulate the total inlet flow rate to the target total inlet flow rate.

[0058] In this embodiment, the water inlet control device also includes a main inlet pipe flow meter. The main inlet pipe flow meter is connected in series at the inlet of the main inlet pipe (see...). Figure 2 The main inlet pipe flow meter collects the total inlet flow rate of the main inlet pipe. The main inlet pipe flow meter is connected to the main control unit via an electrical signal. The main inlet pipe flow meter sends the detected total inlet flow rate to the control unit.

[0059] In this embodiment, the cooling water flow control system further includes an outlet water monitoring device, which includes a main outlet water pipe flow meter arranged on the main outlet water pipe. The main outlet water pipe flow meter is used to collect the total outlet water flow of the main outlet water pipe.

[0060] In this embodiment, the main outlet flow meter is connected in series at the outlet of the main outlet pipe (see...). Figure 2 The main outlet flow meter is connected to the main control unit via an electrical signal.

[0061] In this embodiment, the central control device includes a PLC (Programmable Logic Controller) or other control components. The control components are installed inside the control cabinet of the diaphragm compressor unit, and their signals are connected to the display screen of the control cabinet in the form of electrical signals. The control data can be displayed on the screen.

[0062] In this embodiment, the central control device is used to generate a first instruction by obtaining the corresponding reduction in cylinder coolant volume based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature; it is also used to generate a second instruction by obtaining the corresponding reduction in coolant volume based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature; and it is also used to obtain the minimum reduction value based on the reduction in coolant volume of all cylinder components and the reduction in coolant volume of all coolers, and generate a third instruction based on a preset multiple of the minimum reduction value.

[0063] In this embodiment, the central control device is specifically used to: calculate the exhaust temperature of each cylinder block component and the corresponding first set exhaust temperature to obtain the corresponding cylinder block exhaust temperature difference; calculate the corresponding cylinder block coolant reduction amount based on the exhaust temperature difference of each cylinder block to generate the corresponding first instruction; calculate the exhaust temperature of each cooler and the corresponding second set exhaust temperature to obtain the corresponding cooler exhaust temperature difference; calculate the corresponding cooler coolant reduction amount based on the exhaust temperature difference of each cylinder block to generate the corresponding second instruction.

[0064] like Figure 3 As shown, the central control unit acquires the exhaust temperature of the first-stage cylinder block, calculates the exhaust temperature difference between the first-stage cylinder block exhaust temperature and the first set exhaust temperature corresponding to the first-stage cylinder block component, and calculates the corresponding reduction in cylinder coolant flow based on this exhaust temperature difference. This, in turn, generates a first command corresponding to the first-stage cylinder block component, and the central control unit outputs the corresponding first command to the first-stage cylinder block component to adjust the water flow rate of the branch inlet pipe of the first-stage cylinder block component. Specifically, when the cylinder block exhaust temperature difference changes, the change in thermal energy of the exhaust temperature is equal to the change in thermal energy absorbed by the cylinder block coolant flow rate under the change in the reduction of cylinder coolant flow. In this case, the water flow rate of the branch inlet pipe of the first-stage cylinder block is reduced compared to before, and the first-stage cylinder block exhaust temperature does not exceed the first set exhaust temperature corresponding to the first-stage cylinder block component, thus ensuring system safety and reducing water consumption.

[0065] like Figure 3 As shown, the central control unit acquires the exhaust temperature of the secondary cylinder block, calculates the exhaust temperature difference between the secondary cylinder block exhaust temperature and the first set exhaust temperature corresponding to the secondary cylinder block component, and calculates the corresponding reduction in cylinder block cooling water volume based on this exhaust temperature difference. This, in turn, generates a first command for the secondary cylinder block component, and the central control unit outputs the corresponding first command to the secondary cylinder block component to adjust the water flow rate of the branch inlet pipe of the secondary cylinder block component. In this case, the adjusted water flow rate of the branch inlet pipe of the secondary cylinder block component is reduced compared to before, and the exhaust temperature of the secondary cylinder block does not exceed the first set exhaust temperature corresponding to the secondary cylinder block component, thereby ensuring system safety and reducing water consumption.

[0066] like Figure 3As shown, the central control device acquires the exhaust temperature of the primary cooler, calculates the exhaust temperature difference between the primary cooler and its corresponding second set exhaust temperature, and calculates the corresponding reduction in cooling water flow. Based on this temperature difference, it generates a second command for the primary cooler, which is then sent to adjust the water flow rate in the branch inlet pipes. Specifically, when the exhaust temperature difference changes, the change in heat energy at the exhaust temperature is equal to the change in heat energy absorbed by the cooling water flow rate under the change in cooling water flow rate. In this case, the adjusted water flow rate in the branch inlet pipes of the primary cooler is lower than before, and the exhaust temperature does not exceed the second set exhaust temperature, thus ensuring system safety and reducing water consumption.

[0067] like Figure 3 As shown, the central control unit acquires the exhaust temperature of the secondary cooler, calculates the exhaust temperature difference between the secondary cooler and its corresponding second set exhaust temperature, and calculates the corresponding reduction in cooling water flow. Based on this temperature difference, a second command is generated for the secondary cooler, and the central control unit outputs this second command to adjust the water flow rate in the secondary cooler's branch inlet pipes. In this case, the adjusted water flow rate in the branch inlet pipes of the secondary cooler is reduced compared to before, and the exhaust temperature of the secondary cooler does not exceed the corresponding second set exhaust temperature. This ensures system safety and reduces water consumption.

[0068] In this embodiment, the overall control device is specifically used to: filter the reduction amount of cooling water from all cylinder block cooling water reduction amounts and all cooler cooling water reduction amounts to obtain the minimum reduction amount; obtain the total number of cylinder block components and coolers, and use the total number as a preset multiple; determine the total reduction amount of cooling water in the main inlet pipe based on the preset multiple of the minimum reduction amount to generate a third instruction.

[0069] For example, the master control device filters the reduction in cylinder coolant flow from the first-stage cylinder block component, the second-stage cylinder block component, the first-stage cooler, and the second-stage cooler to obtain the minimum reduction value. The total number of cylinder block components and coolers is 4. The minimum reduction value of 4 times is taken as the total reduction value of the main inlet pipe, and a third command is generated. The master control device outputs the third command to the electric regulating valve of the main inlet pipe to control the water flow of the main inlet pipe.

[0070] The main control unit also acquires the main inlet flow rate detected by the main inlet flow meter and the main outlet flow rate detected by the main outlet flow meter, and determines in real time whether the flow rates of the main inlet and main outlet pipes have reduced the total cooling water volume.

[0071] Specifically, in combination Figure 2 The specific process for controlling the cooling water volume is as follows:

[0072] In response to the current situation where equipment on the market consumes excessive cooling water and the exhaust temperature is generally lower than the corresponding set exhaust temperature, resulting in serious water waste,

[0073] The corresponding exhaust temperature is collected using a primary cylinder block thermometer, a primary cylinder block temperature transmitter, a primary cooler thermometer, a primary cooler temperature transmitter, a secondary cylinder block thermometer, a secondary cylinder block temperature transmitter, a secondary cooler thermometer, and a secondary cooler temperature transmitter.

[0074] When the exhaust temperature is lower than the corresponding set exhaust temperature, the control components of the main control device can calculate the corresponding temperature difference through a programmed algorithm, and calculate the corresponding amount of cooling water to be reduced (i.e., the amount of cooling water reduction). After the amount of reduction is calculated, the control components of the main control device control the opening of the corresponding first-stage cylinder block electric regulating valve, first-stage cooler electric regulating valve, second-stage cylinder block electric regulating valve, and second-stage cooler electric regulating valve. Based on the minimum amount of reduction of the cylinder block components and cooler, the total amount of cooling water reduction of the main inlet pipe is determined, and then the opening of the main inlet pipe electric regulating valve is controlled to reduce the opening of the above electric regulating valves, thereby reducing the water flow to be reduced.

[0075] After reducing the water flow rate, the exhaust temperatures of each cylinder block component and each cooler rise. At this point, the temperature transmitters of the cooling water flow control devices for each cylinder block and each cooler transmit the increased exhaust temperature to the control components of the central control unit. The control components can then compare this increased exhaust temperature with the corresponding set exhaust temperature and correct the above calculation process. If the exhaust temperature is still lower than the corresponding set exhaust temperature, the water flow rate can be further reduced; if it is higher than the corresponding set exhaust temperature, the water flow rate can be increased in the opposite manner. The above process values ​​and flow can be displayed on the control cabinet's screen in the form of a simplified flowchart.

[0076] The cooling water flow control system for a diaphragm compressor according to an embodiment of this disclosure includes at least one cylinder block component, at least one cooler, and cooling water pipes. The cooling water pipes include a main water pipe and multiple sets of branch water pipes. The main water pipe includes a main inlet pipe and a main outlet pipe. Each set of branch water pipes includes a branch inlet pipe and a branch outlet pipe. Each cylinder block component and each cooler are connected to the main water pipe via a separate set of branch water pipes. The cooling water flow control system includes a cylinder block cooling water flow control device, a cooler cooling water flow control device, an inlet water control device, and a main control device. Each cylinder block component is equipped with a separate cylinder block cooling water flow control device. Each cylinder block cooling water flow control device is used to collect the exhaust temperature of the corresponding cylinder block component and adjust the water flow rate of the branch inlet pipe in the corresponding set of branch water pipes of that cylinder block component based on a first command. Each cooler is equipped with a single... Each cooler has a unique cooler water flow control device. Each cooler water flow control device is used to collect the exhaust temperature of the corresponding cooler and adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of the cooler based on the second command. The water inlet control device is arranged on the main water inlet pipe and is used to adjust the total water inlet flow rate to the target total water inlet flow rate based on the third command. The main control device is used to obtain the corresponding cylinder block cooler water flow reduction amount based on the exhaust temperature of all cylinder block components and the corresponding first set exhaust temperature to generate the first command. It is also used to obtain the corresponding cooler cooler water flow reduction amount based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature to generate the second command. It is also used to obtain the minimum reduction amount based on the reduction amount of all cylinder block cooler water flow rate and the reduction amount of all cooler cooler water flow rate, and generate the third command based on the preset multiple of the minimum reduction amount. In this scenario, the reduction in cylinder cooling water volume is determined based on the exhaust temperatures of all cylinder components and the corresponding first set exhaust temperatures. Similarly, the reduction in cooler cooling water volume is determined based on the exhaust temperatures of all coolers and the corresponding second set exhaust temperatures. Furthermore, the total inlet flow rate is determined by minimizing the reductions in cooling water volume across all cylinder components and all coolers. This allows for more accurate control of the cooling water volume, thereby reducing the cooling water consumption of the diaphragm compressor and achieving cost reduction and water conservation. The system disclosed herein effectively controls cooling water usage, particularly beneficial in areas with large diurnal temperature variations and significant temperature differences between winter and summer, saving cooling water consumption in the diaphragm compressor, reducing costs, conserving water resources, and protecting the environment.

[0077] The following are embodiments of the method disclosed herein. For details not disclosed in the embodiments of the method disclosed herein, please refer to the system embodiments of the method disclosed herein. The embodiments of the method disclosed herein propose a method for controlling the cooling water volume of a diaphragm compressor. This method for controlling the cooling water volume of a diaphragm compressor employs the cooling water volume control system for diaphragm compressors described in the above system embodiments.

[0078] Figure 4 A flowchart illustrating a cooling water volume control method for a diaphragm compressor provided in an embodiment of this disclosure is shown. Figure 4 As shown, the cooling water flow control method for a diaphragm compressor includes:

[0079] Step S11: Obtain the exhaust temperature of all cylinder block components and the exhaust temperature of all coolers;

[0080] Step S12: Based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature, obtain the corresponding cylinder cooling water reduction amount to generate the corresponding first instruction, and use the first instruction to adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of each cylinder component.

[0081] Step S13: Based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature, obtain the corresponding reduction in the cooling water volume of the coolers to generate the corresponding second instruction, and use the second instruction to adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of each cooler.

[0082] Step S14: Based on the reduction of cooling water volume in all cylinders and the reduction of cooling water volume in all coolers, obtain the minimum reduction value, generate a third instruction based on a preset multiple of the minimum reduction value, and use the third instruction to adjust the total water inlet flow rate to the target total water inlet flow rate.

[0083] In step S12, the corresponding cylinder coolant reduction amount is obtained based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature to generate the corresponding first instruction. This includes: calculating the exhaust temperature of each cylinder component and the corresponding first set exhaust temperature to obtain the corresponding cylinder exhaust temperature difference, and calculating the corresponding cylinder coolant reduction amount based on the exhaust temperature difference of each cylinder to generate the corresponding first instruction.

[0084] In step S13, the corresponding cooler cooling water volume reduction is obtained based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature to generate the corresponding second instruction. This includes: calculating the exhaust temperature of each cooler and the corresponding second set exhaust temperature to obtain the corresponding cooler exhaust temperature difference, and calculating the corresponding cooler cooling water volume reduction based on the exhaust temperature difference of each cylinder block to generate the corresponding second instruction.

[0085] In step S14, the minimum reduction value is obtained based on the reduction of cooling water volume in all cylinder blocks and the reduction of cooling water volume in all coolers. A third instruction is generated based on a preset multiple of the minimum reduction value. This includes: filtering the minimum reduction value from the reduction of cooling water volume in all cylinder blocks and the reduction of cooling water volume in all coolers; obtaining the total number of cylinder block components and coolers, and using the total number as a preset multiple; and determining the total reduction of cooling water volume in the main inlet pipe based on the preset multiple of the minimum reduction value to generate the third instruction.

[0086] It should be noted that the foregoing explanation of the embodiment of the cooling water volume control system for the diaphragm compressor also applies to the cooling water volume control method for the diaphragm compressor in this embodiment, and will not be repeated here.

[0087] The sequence numbers of the embodiments disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0088] In the cooling water flow control method for a diaphragm compressor disclosed herein, the exhaust temperatures of all cylinder components and all coolers are obtained; based on the exhaust temperatures of all cylinder components and the corresponding first set exhaust temperatures, a corresponding cylinder cooling water flow reduction is obtained to generate a corresponding first instruction; the water flow rate of the branch inlet pipe in the corresponding group of branch water pipes for each cylinder component is adjusted using the first instruction; based on the exhaust temperatures of all coolers and the corresponding second set exhaust temperatures, a corresponding cooler cooling water flow reduction is obtained to generate a corresponding second instruction; the water flow rate of the branch inlet pipe in the corresponding group of branch water pipes for each cooler is adjusted using the second instruction; based on the cooling water flow reduction of all cylinder components and the cooling water flow reduction of all coolers, a minimum reduction value is obtained; a third instruction is generated based on a preset multiple of the minimum reduction value; the total inlet water flow rate is adjusted to the target total inlet water flow rate using the third instruction. In this scenario, the reduction in cylinder cooling water volume is determined based on the exhaust temperatures of all cylinder components and the corresponding first set exhaust temperatures. Similarly, the reduction in cooler cooling water volume is determined based on the exhaust temperatures of all coolers and the corresponding second set exhaust temperatures. Furthermore, the total inlet flow rate is determined by minimizing the reductions in cooling water volume across all cylinder components and all coolers. This allows for more accurate control of the cooling water volume, thereby reducing the cooling water consumption of the diaphragm compressor and achieving cost reduction and water conservation. The method disclosed herein effectively controls cooling water usage, and is particularly beneficial in areas with large diurnal temperature variations and significant temperature differences between winter and summer, saving cooling water consumption in the diaphragm compressor, reducing costs, conserving water resources, and protecting the environment.

[0089] The accompanying drawings show structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not drawn to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0090] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this disclosure does not impose any restrictions here.

[0091] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A cooling water flow control system for a diaphragm compressor, characterized in that, The diaphragm compressor includes at least one cylinder block component, at least one cooler, and cooling water pipes. The cooling water pipes include a main water pipe and multiple sets of branch water pipes. The main water pipe includes a main inlet water pipe and a main outlet water pipe. Each set of branch water pipes includes a branch inlet water pipe and a branch outlet water pipe. Each cylinder block component and each cooler are connected to the main water pipe via a separate set of branch water pipes. The cooling water volume control system includes a cylinder block cooling water volume control device, a cooler cooling water volume control device, an inlet water control device, and a main control device. Each cylinder block component is equipped with a separate cylinder block cooling water volume control device. Each cylinder block cooling water volume control device is used to collect the exhaust temperature of the corresponding cylinder block component and adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of the cylinder block component based on the first command. Each cooler is equipped with a separate cooler cooling water flow control device. Each cooler cooling water flow control device is used to collect the exhaust temperature of the corresponding cooler and adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes based on the second command. The water inlet control device is arranged on the main water inlet pipe, and the water inlet control device is used to adjust the total water inlet flow to the target total water inlet flow based on a third command; The central control device is used to generate a first instruction by obtaining the corresponding reduction in cylinder coolant volume based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature; it is also used to generate a second instruction by obtaining the corresponding reduction in coolant volume based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature; and it is also used to obtain the minimum reduction value based on the reduction in coolant volume of all cylinder components and the reduction in coolant volume of all coolers, and generate a third instruction based on a preset multiple of the minimum reduction value. The central control device is specifically used for: The exhaust temperature of each cylinder component and the corresponding first set exhaust temperature are calculated to obtain the corresponding cylinder exhaust temperature difference. Based on the exhaust temperature difference of each cylinder, the corresponding cylinder coolant reduction is calculated to generate the corresponding first instruction. Calculate the exhaust temperature of each cooler and the corresponding second set exhaust temperature to obtain the corresponding cooler exhaust temperature difference. Based on the exhaust temperature difference of each cooler, calculate the corresponding cooler cooling water volume reduction to generate the corresponding second instruction. The central control device is specifically used for: The minimum reduction value was obtained by filtering the reduction of cooling water volume in all cylinder blocks and all coolers. Obtain the total number of cylinder block components and coolers, and use the total number as a preset multiple; The total cooling water reduction in the main inlet pipe is determined based on a preset multiple of the minimum reduction amount to generate a third instruction.

2. The cooling water flow control system for a diaphragm compressor as described in claim 1, characterized in that, Each cylinder block cooling water volume control device includes a cylinder block thermometer and a cylinder block electric regulating valve arranged in the branch water inlet pipe of the corresponding group of branch water pipes; each cooler cooling water volume control device includes a cooler thermometer and a cooler electric regulating valve arranged in the branch water inlet pipe of the corresponding group of branch water pipes, and the water inlet control device includes a main water inlet pipe electric regulating valve.

3. The cooling water flow control system for a diaphragm compressor as described in claim 2, characterized in that, The water inlet control device also includes a main water inlet pipe flow meter, which collects the total water inlet flow of the main water inlet pipe.

4. The cooling water flow control system for a diaphragm compressor as described in claim 3, characterized in that, The cooling water flow control system also includes an outlet water monitoring device, which includes a main outlet pipe flow meter arranged on the main outlet pipe. The main outlet pipe flow meter is used to collect the total outlet water flow of the main outlet pipe.

5. A cooling water volume control method based on the cooling water volume control system for a diaphragm compressor as described in any one of claims 1-4, characterized in that, include: Obtain the exhaust temperature of all cylinder block components and the exhaust temperature of all coolers; Based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature, the corresponding cylinder cooling water reduction amount is obtained to generate the corresponding first instruction. The first instruction is used to adjust the water flow rate of the branch water inlet pipe in the corresponding group of branch water pipes of each cylinder component. Based on the exhaust temperature of all coolers and the corresponding second set exhaust temperature, the corresponding cooler cooling water volume reduction is obtained to generate the corresponding second instruction. The second instruction is used to adjust the water flow rate of the branch inlet pipe in the corresponding group of branch water pipes of each cooler. The minimum reduction is obtained based on the reduction of cooling water volume in all cylinders and all coolers. A third instruction is generated based on a preset multiple of the minimum reduction. The third instruction is used to adjust the total water inlet flow rate to the target total water inlet flow rate.

6. The cooling water volume control method as described in claim 5, characterized in that, The step of obtaining the corresponding cylinder coolant reduction amount based on the exhaust temperature of all cylinder components and the corresponding first set exhaust temperature to generate the corresponding first instruction includes: The exhaust temperature of each cylinder component and the corresponding first set exhaust temperature are calculated to obtain the corresponding cylinder exhaust temperature difference. Based on the exhaust temperature difference of each cylinder, the corresponding reduction in cylinder coolant volume is calculated to generate the corresponding first instruction.

7. The cooling water volume control method as described in claim 6, characterized in that, The step of obtaining the corresponding reduction in coolant flow rate based on the exhaust temperatures of all coolers and the corresponding second set exhaust temperature to generate the corresponding second instruction includes: The exhaust temperature of each cooler and the corresponding second set exhaust temperature are calculated to obtain the corresponding cooler exhaust temperature difference. Based on the exhaust temperature difference of each cooler, the corresponding reduction in cooler cooling water volume is calculated to generate the corresponding second instruction.

8. The cooling water volume control method as described in claim 7, characterized in that, The minimum reduction value is obtained based on the reduction in cooling water volume of all cylinder blocks and all coolers. A third instruction is generated based on a preset multiple of the minimum reduction value, including: The minimum reduction value was obtained by filtering the reduction of cooling water volume in all cylinder blocks and all coolers. Obtain the total number of cylinder block components and coolers, and use the total number as a preset multiple; The total cooling water reduction in the main inlet pipe is determined based on a preset multiple of the minimum reduction amount to generate a third instruction.

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