Water circulation control device for vacuum pump set

Abstract

The invention relates to the technical field of vacuum pumps, and particularly discloses a water circulation control device for a vacuum pump set, which comprises a heat exchange mechanism, a load pressure detection mechanism, a distance adjusting mechanism, an electromagnetic excitation mechanism, an ion concentration detection mechanism and an ion concentration adjusting mechanism. When the load pressure of the water ring vacuum pump changes, the load pressure detection mechanism can detect the load pressure and judge whether the load is in a high-pressure state or a low-pressure state at the moment, so that the distance between the cooling pipelines on the innermost circle is adjusted, and the flow speed of liquid entering the cooling channels is adjusted; therefore, the circulating pump is dynamically adjusted according to the load pressure of the water ring vacuum pump, energy is saved while the water circulating cooling requirement is met, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum pumps, and in particular to a water circulation control device for a vacuum pump group. Background Art

[0002] Water ring vacuum pump is a kind of vacuum pump widely used in the industrial field, which mainly uses the flow of water ring to suck gas. Water ring vacuum pump has the advantages of simple structure, stable operation, low noise, convenient operation and maintenance, etc. It plays a vital role in vacuum applications, especially for some high-precision production processes, such as semiconductor, pharmaceutical and other industries. The stable operation of water ring vacuum pump is crucial to the quality assurance of equipment and products.

[0003] The working principle of the water ring vacuum pump is based on the formation and rotation of the water ring. When water is pumped into the pump chamber, the water ring is formed around the pump's rotor, and the rotation of the rotor drives the flow of the water ring, generating negative pressure to suck the gas. As the gas in the pump chamber is compressed and discharged during operation, the water temperature in the pump gradually increases, which is particularly evident when working under high load. As the load pressure increases, the operating temperature in the water ring tends to rise, resulting in a decrease in the efficiency of the pump and may even affect the long-term stability of the equipment.

[0004] Traditional water ring vacuum pumps often cool water by removing heat from the water through a water circulation system to keep the water temperature within a reasonable range. Conventional water circulation cooling methods usually rely on an external cooling system to cool the water in the water ring through a heat exchanger. Usually, these water cooling systems use a constant flow of cooling water to exchange heat with the water ring water through a heat exchanger to remove the heat from the water ring water. In this way, the temperature of the water ring can be effectively controlled to prevent its temperature from being too high and affecting the performance of the pump.

[0005] In practical applications, the load pressure of the water ring vacuum pump is often in a fluctuating state, and its changes are not always predictable. It is often affected by multiple factors such as air extraction demand, working condition changes, and system adjustments. Fluctuations in load pressure may cause the water temperature in the pump to show different changing trends in different time periods. When the load pressure is high, the operating load of the pump increases, causing the cooling water temperature in the water ring to rise rapidly; when the load pressure is low, the temperature rise of the cooling water is relatively slow, but it will still affect the heat dissipation efficiency of the pump. Due to this complex change in load pressure, the traditional cooling water circulation method usually uses a relatively fixed flow rate and efficiency for cooling, and fails to make timely adjustments according to load changes.

[0006] The limitation of this method is that although the cooling system provides a continuous flow of cooling water, its flow rate and working efficiency do not respond to the real-time changes in the load in the pump. When the load pressure increases, the flow rate and heat exchange efficiency of the cooling water are difficult to provide sufficient cooling effect; on the contrary, when the load pressure decreases, the flow rate of the cooling water does not decrease, resulting in energy waste, insufficient energy saving, and no significant contribution to the improvement of cooling efficiency. Overall, the traditional water circulation cooling method fails to effectively adapt to the fluctuations of load changes, resulting in the heat exchanger being unable to achieve the optimal heat dissipation effect during operation, which in turn affects the operating stability and efficiency of the pump. Summary of the invention

[0007] In order to achieve dynamic regulation of the water ring flow rate and the heat exchange efficiency of the heat exchanger according to the load pressure change of the water ring vacuum pump, the present application provides a water circulation control device for a vacuum pump group.

[0008] The present application provides a water circulation control device for a vacuum pump group, which adopts the following technical solution: A water circulation control device for a vacuum pump group, comprising a heat exchange mechanism, for circulating and cooling the water ring of a water ring vacuum pump, wherein the heat exchange mechanism comprises a heat exchange shell and a plurality of cooling pipes arranged at intervals in the heat exchange shell, wherein each of the cooling pipes is arranged in a multi-layer circumferential shape, and a cooling channel is reserved between each of the cooling pipes and the heat exchange shell; The water ring vacuum pump comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are respectively provided with a load pressure detection mechanism for detecting the load pressure of the water ring vacuum pump, both ends of the heat exchange shell are provided with a distance adjustment mechanism for adjusting the spacing between the innermost circle cooling pipes, and an electromagnetic excitation mechanism is provided between the innermost circle adjacent cooling pipes; It also includes an ion concentration detection mechanism for detecting the concentration of conductive ions in cooling water entering or flowing out of the cooling pipe, and an ion concentration adjustment mechanism for adjusting the concentration of conductive ions in cooling water entering or flowing out of the cooling pipe.

[0009] By adopting the above technical solution, when the load pressure of the water ring vacuum pump changes, the load pressure detection mechanism can detect its size and determine whether the load is in a high pressure or low pressure state at this time.

[0010] If it is in a low-pressure state, no adjustment is required or the distance adjustment mechanism is adjusted to make the innermost circle of cooling pipes move closer to each other. At this time, the flow rate of the liquid inlet pipe entering the cooling channel is reduced, and the flow velocity is increased, which increases the turbulence of the liquid flow. The turbulent flow makes the heat exchange between the water flow and the cooling pipe more intense, so that the cooling water can more effectively take away heat from the cooling pipe and reduce the water ring temperature of the water ring vacuum pump.

[0011] The increase in the speed of the liquid not only improves the heat exchange efficiency, but also means a higher heat conduction capacity per unit time, which can promptly take away the heat generated inside the water ring vacuum pump and avoid the water ring temperature being too high and affecting the working performance of the pump.

[0012] If it is in a high pressure state, adjust the distance adjustment mechanism to make the innermost circle of cooling pipes move away from each other. At this time, the flow rate of the liquid inlet pipe entering the cooling channel increases, and the flow rate decreases. Too fast water flow may cause uneven cooling effect, and even excessive local water flow may increase the wear of the inner wall of the water ring vacuum pump pipeline and bubble formation.

[0013] Slowing down the flow rate helps the liquid flow more evenly in the pipe, avoids bubbles or excessive turbulence, and maintains the stability of the cooling system. Under high load pressure, the vacuum pump generates a lot of heat. At this time, moderately reducing the flow rate helps the liquid to better contact the cooling pipe in the cooling channel, increase the heat exchange time, ensure that the cooling water can continue to absorb heat, and avoid overheating of the equipment caused by excessive temperature.

[0014] When in a high pressure state, the electromagnetic excitation mechanism can also be controlled to improve the heat exchange efficiency between the cooling water and the liquid, thereby achieving a better cooling effect. The ion concentration detection mechanism and the ion concentration adjustment mechanism can cooperate with the electromagnetic excitation mechanism to achieve a more perfect cooling control of the liquid ring in the water ring vacuum pump. Therefore, the water circulation process can be adaptively and dynamically adjusted according to the load pressure, meeting the water circulation cooling requirements while achieving energy saving.

[0015] Optionally, the liquid inlet pipe and the liquid outlet pipe are respectively opposite to the centers of the two ends of the heat exchange shell and are connected to the cooling channel, the ends of the cooling pipes on the same side are connected to each other, a water storage tank, a water pump, and a cooling inlet pipe and a cooling outlet pipe for connecting the ends of the cooling pipes to the water storage tank and the water pump in sequence are arranged outside the heat exchange shell, and the water storage tank is equipped with cooling water for cooling the liquid of the water ring vacuum pump fluid; The load pressure detection mechanism includes pressure sensors and a controller arranged on the liquid inlet pipe and the liquid outlet pipe. The two pressure sensors can detect the pressure of the liquid flowing through the liquid inlet pipe and the liquid outlet pipe. The controller is electrically connected to the two pressure sensors.

[0016] By adopting the above technical solution, when the pressure sensor detects the pressure exerted on the pressure sensor by the liquid in the liquid inlet pipe or the liquid outlet pipe, the pressure sensor transmits the pressure signal to the controller, and the controller controls the distance adjustment mechanism to perform corresponding actions.

[0017] Optionally, the distance adjustment mechanism includes a driving member, a gear, a transmission assembly and a turntable. The turntable is rotatably installed in the heat exchange shell, and a plurality of arc grooves are provided on the turntable corresponding to each cooling pipe in the innermost circle. The end of each cooling pipe is slidably engaged in the corresponding arc groove. The driving member is installed on the liquid inlet pipe or the liquid outlet pipe and is electrically connected to the controller. The gear is coaxially fixed on the output end of the driving member. The transmission assembly is respectively arranged inside and outside the liquid inlet pipe or the liquid outlet pipe, and is used to enable the gear to drive the turntable to rotate.

[0018] By adopting the above technical solution, when the driving part is working, it drives the gear to rotate, and the gear drives the turntable to rotate through the transmission assembly. The arc groove on the turntable drives the ends of each cooling pipe to move towards or away from each other, thereby realizing the adjustment of the distance between the cooling pipes in the innermost circle.

[0019] Optionally, the transmission assembly includes an outer gear ring, a first permanent magnet, a second permanent magnet, a connecting rod and a rotating shaft, the outer gear ring is coaxially rotatably installed on the outside of the liquid inlet pipe or the liquid outlet pipe, the outer gear ring is meshed with the gear, a plurality of first permanent magnets are provided, and a plurality of first permanent magnets are embedded at intervals on the inner wall of the outer gear ring, the rotating shaft is coaxially fixed with the rotating axis of the turntable, and the end of the rotating shaft away from the turntable is fixedly connected to the connecting rod, a plurality of second permanent magnets are provided corresponding to each of the first permanent magnets, each of the second permanent magnets is fixed to the end of the connecting rod and corresponds to each of the first permanent magnets one by one, and each of the second permanent magnets is slidably installed on the inner wall of the liquid inlet pipe or the liquid outlet pipe, and each of the second permanent magnets has opposite magnetic properties to the corresponding first permanent magnet and is arranged oppositely.

[0020] By adopting the above technical solution, when the gear rotates, it drives the outer gear ring to rotate, and the outer gear ring drives the first permanent magnets to rotate. Under the action of magnetic force, the first permanent magnets drive the second permanent magnets to rotate, so that the connecting rod drives the turntable to rotate, thereby realizing the adjustment of the distance between the cooling pipes and the adjustment of the liquid flow and flow rate entering the cooling channel.

[0021] Optionally, a plurality of opened fixing rods are provided between the rotating shaft and the rotating disk, one end of each fixing rod is fixed to the end of the rotating shaft, and the other end is fixed to a position of the rotating disk away from the rotation axis, and the rotating disk is hollowed out.

[0022] By adopting the above technical solution, the liquid can enter or be discharged from the cooling channel more smoothly, and the influence of the turntable on the liquid circulation is reduced.

[0023] Optionally, the electromagnetic excitation mechanism includes an outer casing, a piezoelectric ceramic, a conductive sheet, a pulling frame, a pulling rod and a coil, the outer casing is arranged between the innermost circle of adjacent cooling pipes and is closed at both ends, the piezoelectric ceramic is fixed in the outer casing and the two ends are respectively opposite to the two ends of the outer casing, the conductive sheet, the pulling frame and the pulling rod are each provided in two groups, the two conductive sheets are each provided at the two ends of the piezoelectric ceramic, the two pulling frames are respectively fixedly connected to the corresponding conductive sheets, and one end of the pulling rod is rotatably mounted on the corresponding pulling frame; A hollow closed ring cavity is fixedly sleeved on the outer wall of the innermost circle cooling pipe, the coil is wound on the outer wall of the cooling pipe in the closed ring cavity, the other end of the pull rod is rotatably mounted on the outer wall of the closed ring cavity, two wires are buried in the pulling frame and the pull rod, one end of the wire is respectively connected to the two ends of the coil, and the other end is respectively electrically connected to the two conductive sheets; When the adjacent cooling pipes move away from each other, the two pull rods squeeze the two ends of the piezoelectric ceramic through the corresponding conductive sheets.

[0024] By adopting the above technical solution, when the turntable drives the cooling pipes of the innermost circle to move away from each other, the pull rod pulls the corresponding pulling frame, so that the two pulling frames drive the conductive sheets to squeeze the two ends of the piezoelectric ceramic. The potential difference generated at the two ends of the piezoelectric ceramic is transmitted to the coil through the wire, so that current is generated in the coil, thereby generating a magnetic field around the coil. The magnetic field can increase the turbulence of the cooling water with conductive ions in the cooling pipe. The turbulence makes the heat diffuse in the water faster, increases the contact frequency between the liquid and the cooling water, and improves the heat exchange efficiency.

[0025] Optionally, a magnetic field detection mechanism for detecting the magnitude of the magnetic field generated by the coil is provided in the closed ring cavity, and the magnetic field detection mechanism is electrically connected to the controller.

[0026] By adopting the above technical solution, the magnetic field detection mechanism can detect the magnitude of the magnetic field generated by the coil, so as to adaptively adjust the magnitude of the electromagnetic excitation, making the adjustment process more reasonable.

[0027] Optionally, the ion concentration detection mechanism includes conductivity sensors arranged on the cooling inlet pipe and the cooling outlet pipe, and both of the conductivity sensors are electrically connected to the controller.

[0028] By adopting the above technical solution, the conductivity sensor can detect the concentration of conductive ions in the cooling water, so that the ion concentration regulating mechanism can keep the conductive ions in the cooling water within a suitable range, which is convenient for the continuous electromagnetic excitation.

[0029] Optionally, the ion concentration regulating mechanism includes an electromagnetic switching valve, a water injection pipe and a conductive ion addition pipe arranged on the cooling inlet pipe, the electromagnetic switching valve is electrically connected to the controller, the inlet end of the electromagnetic switching valve is connected to the water injection pipe and the conductive ion addition pipe respectively, the water injection pipe and the conductive ion addition pipe are connected to an external water supply system and a conductive ion supply system respectively, the outlet end of the electromagnetic switching valve is connected to the inner cavity of the cooling inlet pipe, and the electromagnetic switching valve is used to connect the water injection pipe or the conductive ion addition pipe with the inner cavity of the cooling inlet pipe.

[0030] By adopting the above technical solution, when the conductive ion concentration in the cooling water is less than the set value, the electromagnetic switching valve switches the conductive ion adding pipe to communicate with the inner cavity of the cooling inlet pipe, and adds conductive ions into the cooling inlet pipe, thereby increasing the ion concentration in the cooling water to a suitable range. When the ion concentration in the cooling water is greater than the set value, the electromagnetic switching valve switches the water injection pipe to communicate with the inner cavity of the cooling inlet pipe, and adds clean water into the cooling inlet pipe, thereby reducing the ion concentration in the cooling water to a suitable range, so that the electromagnetic excitation can be carried out for a long time.

[0031] Optionally, both ends of the water tank are connected to the cooling inlet pipe and the cooling outlet pipe respectively, and the cooling inlet pipe is connected to the top of the water tank, and the cooling outlet pipe is connected to the bottom of the water tank. Multiple layers of cooling fins are arranged in sequence from top to bottom in the water tank for cooling the cooling water entering the water tank.

[0032] By adopting the above technical solution, after the cooling water exchanges heat with the liquid, the cooling water gradually heats up. When the heated cooling water enters the inner cavity from the top of the water storage tank, the cooling water can be gradually cooled down through multiple layers of cooling fins, so that the cooling water can return to a low temperature state when discharged from the water storage tank.

[0033] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the load pressure of the water ring vacuum pump changes dynamically, the load pressure detection mechanism will detect the load pressure and determine whether the load pressure is too large, appropriate or too small at this time. The distance adjustment mechanism adjusts the distance between the innermost circle cooling pipes according to the load pressure to achieve the flow rate of the water ring vacuum pump load. The electromagnetic excitation mechanism cooperates with the distance adjustment mechanism to adjust the heat exchange efficiency of the cooling water, so that the cooling water can cool the liquid ring of the water ring vacuum pump more efficiently or energy-savingly, so as to achieve dynamic adjustment of the dynamic load, so that the heat exchanger can achieve the best heat dissipation effect and energy saving during the working process, and improve the operation stability and efficiency of the water ring vacuum pump; 2. The conductivity sensor can monitor the ion concentration of cooling water in real time and feed the data back to the controller to ensure stable water quality and prevent the reduction of heat exchanger efficiency or equipment corrosion caused by changes in ion concentration; 3. Conventional cooling systems usually use a fixed flow of cooling water for cooling, which cannot be adjusted in real time according to the load pressure inside the water ring vacuum pump. This fixed flow method cannot meet the precise control of water temperature when the load pressure fluctuates greatly; 4. Conventional cooling systems lack the function of regulating the internal exchange efficiency of the heat exchanger, resulting in the cooling effect of the heat exchanger not being maximized in some cases, causing energy waste and low cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 Schematic diagram of the overall structure of a water circulation control device for a vacuum pump group in this embodiment; Figure 2 yes Figure 1 Schematic diagram of part of the structure of the reclaimed water circulation control device; Figure 3 yes Figure 2 Structural schematic diagram of the cooling pipe; Figure 4 yes Figure 3 Structural schematic diagram of the mid-distance adjustment mechanism; Figure 5 yes Figure 4 Schematic diagram of a partial explosion structure at the mid-range adjustment mechanism; Figure 6 yes Figure 3 Schematic diagram of the structure of the electromagnetic excitation mechanism; Figure 7 yes Figure 6 Schematic diagram of the internal structure of the electromagnetic excitation mechanism.

[0036] Figure numerals: 1, water ring vacuum pump; 11, liquid inlet pipe; 12, liquid outlet pipe; 2, heat exchange shell; 21, cooling pipe; 211, closed ring cavity; 22, cooling channel; 3, water storage tank; 31, cooling inlet pipe; 311, conductivity sensor; 32, cooling outlet pipe; 4, water pump; 5, distance adjustment mechanism; 51, driving member; 52, gear; 53, outer gear ring; 54, first permanent magnet; 55, second permanent magnet; 56, connecting rod; 57, rotating shaft; 571, fixing rod; 58, turntable; 581, arc groove; 6, electromagnetic excitation mechanism; 61, outer casing; 62, piezoelectric ceramics; 63, conductive sheet; 64, pulling frame; 65, coil; 7, ion concentration adjustment mechanism; 71, electromagnetic switching valve; 72, water injection pipe; 73, conductive ion addition pipe. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 , further details of this application are given.

[0038] An embodiment of the present application discloses a water circulation control device for a vacuum pump group.

[0039] Reference Figure 1 and Figure 2 A water circulation control device for a vacuum pump group is used for circulating and cooling the water ring of a water ring vacuum pump 1, including a heat exchange mechanism for heat exchange and cooling the liquid flowing out of the water ring vacuum pump 1, the heat exchange mechanism including a heat exchange shell 2 and a plurality of cooling pipes 21 arranged at intervals in the heat exchange shell 2, each of the cooling pipes 21 is arranged in a multi-layer circumferential shape, and a cooling channel 22 is reserved between each cooling pipe 21 and the heat exchange shell 2.

[0040] Reference Figure 1 and Figure 2 The water ring vacuum pump 1 is provided with a liquid inlet pipe 11 and a liquid outlet pipe 12, which are respectively opposite to the centers of the two ends of the heat exchange shell 2 and are connected with the cooling channel 22, and the ends of each cooling pipe 21 on the same side are connected with each other. A water storage tank 3 and a water pump 4 are provided outside the heat exchange shell 2, as well as a cooling inlet pipe 31 and a cooling outlet pipe 32 for connecting the ends of each cooling pipe 21 with the water storage tank 3 and the water pump 4 in sequence, respectively. The water storage tank 3 is equipped with cooling water for cooling the liquid of the water ring vacuum pump 1 fluid.

[0041] The two ends of the water tank 3 are respectively connected to the cooling inlet pipe 31 and the cooling outlet pipe 32, and the cooling inlet pipe 31 is connected to the top of the water tank 3, and the cooling outlet pipe 32 is connected to the bottom of the water tank 3. Multiple layers of cooling fins are arranged in sequence from top to bottom in the water tank 3 to cool the cooling water entering the water tank 3.

[0042] After the cooling water exchanges heat with the liquid, the cooling water gradually heats up. When the heated cooling water enters the inner cavity from the top of the water storage tank 3, the cooling water can be gradually cooled down through multiple layers of cooling fins, so that the cooling water can return to a low temperature state when discharged from the water storage tank 3.

[0043] Reference Figure 1 and Figure 2 A load pressure detection mechanism for detecting the load pressure of the water ring flowing through the water ring vacuum pump 1 is respectively arranged on the liquid inlet pipe 11 and the liquid outlet pipe 12. A distance adjustment mechanism 5 for adjusting the spacing between the innermost circle cooling pipes 21 is arranged at both ends of the heat exchange shell 2. An electromagnetic excitation mechanism 6 for electromagnetically exciting the cooling water flowing through the cooling pipes 21 is arranged between the innermost circle adjacent cooling pipes 21. When the distance adjustment mechanism 5 drives the innermost circle cooling pipes 21 to move away from each other, the innermost circle adjacent cooling pipes 21 drive the electromagnetic excitation mechanism 6 to electromagnetically excite the cooling water in the innermost circle cooling pipe 21.

[0044] Reference Figure 1 and Figure 2 The cooling inlet pipe 31 and the cooling outlet pipe 32 are also provided with an ion concentration detection mechanism for detecting the conductive ion concentration in the cooling water entering or flowing out of the cooling pipe 21, and an ion concentration adjustment mechanism 7 for adjusting the conductive ion concentration in the cooling water entering or flowing out of the cooling pipe 21.

[0045] The load pressure detection mechanism includes pressure sensors and a controller arranged on the liquid inlet pipe 11 and the liquid outlet pipe 12. The two pressure sensors can detect the pressure of the liquid flowing through the liquid inlet pipe 11 and the liquid outlet pipe 12. The controller is electrically connected to the two pressure sensors.

[0046] When the pressure sensor detects the pressure exerted on the pressure sensor by the liquid in the liquid inlet pipe 11 or the liquid outlet pipe 12, the pressure sensor transmits the pressure signal to the controller, and the controller controls the distance adjustment mechanism 5 to perform corresponding actions.

[0047] Reference Figure 2 , Figure 3 and Figure 4 The distance adjustment mechanism 5 includes a driving member 51, a gear 52, a transmission assembly and a turntable 58. The turntable 58 is rotatably installed in the heat exchange shell 2, and a plurality of arc grooves 581 are opened on the turntable 58 corresponding to each innermost circle cooling pipe 21. The end of each cooling pipe 21 is slidably engaged in the corresponding arc groove 581. The driving member 51 adopts a reduction motor. The driving member 51 is installed on the liquid inlet pipe 11 or the liquid outlet pipe 12 and is electrically connected to the controller. The gear 52 is coaxially fixed on the output end of the driving member 51. The transmission assembly is respectively arranged inside and outside the liquid inlet pipe 11 or the liquid outlet pipe 12, so as to enable the gear 52 to drive the turntable 58 to rotate.

[0048] When the driving member 51 is working, it drives the gear 52 to rotate, and the gear 52 drives the turntable 58 to rotate through the transmission assembly. The arc groove 581 on the turntable 58 drives the ends of each cooling pipe 21 to move towards or away from each other, thereby adjusting the distance between the cooling pipes 21 in the innermost circle.

[0049] Reference Figure 3 , Figure 4 and Figure 5 The transmission assembly includes an outer gear ring 53, a first permanent magnet 54, a second permanent magnet 55, a connecting rod 56 and a rotating shaft 57. The outer gear ring 53 is coaxially rotatably installed outside the liquid inlet pipe 11 or the liquid outlet pipe 12, and the outer gear ring 53 is meshed with the gear 52. A plurality of first permanent magnets 54 are provided, and a plurality of first permanent magnets 54 are embedded at intervals on the inner wall of the outer gear ring 53. The rotating shaft 57 is coaxially fixed with the rotating axis of the rotating disk 58, and one end of the rotating shaft 57 away from the rotating disk 58 is fixedly connected to the connecting rod 56. A plurality of second permanent magnets 55 are provided corresponding to each first permanent magnet 54, and each second permanent magnet 55 is fixed to the end of the connecting rod 56 and corresponds to each first permanent magnet 54 one by one, and each second permanent magnet 55 is slidably installed on the inner wall of the liquid inlet pipe 11 or the liquid outlet pipe 12, and each second permanent magnet 55 has opposite magnetic properties to the corresponding first permanent magnet 54 and is arranged directly opposite to it.

[0050] When the gear 52 rotates, it drives the outer gear ring 53 to rotate, and the outer gear ring 53 drives the first permanent magnets 54 to rotate. Under the action of magnetic force, the first permanent magnets 54 drive the second permanent magnets 55 to rotate, so that the connecting rod 56 drives the turntable 58 to rotate, thereby adjusting the distance between the cooling pipes 21 and adjusting the flow rate and flow velocity of the liquid entering the cooling channel 22.

[0051] In order to reduce the influence of the surface of the turntable 58 on the liquid circulation, a plurality of open fixing rods 571 are arranged between the rotating shaft 57 and the turntable 58, and one end of each fixing rod 571 is fixed to the end of the rotating shaft 57, and the other end is fixed to a position of the turntable 58 away from the rotation axis, and the turntable 58 is hollowed out.

[0052] Reference Figure 6 and Figure 7 The electromagnetic excitation mechanism 6 includes an outer casing 61, a piezoelectric ceramic 62, a conductive sheet 63, a pulling frame 64, a pull rod and a coil 65. The outer casing 61 is arranged between the innermost circle of adjacent cooling pipes 21 and is closed at both ends. The piezoelectric ceramic 62 is fixed in the outer casing 61 and the two ends are respectively opposite to the two ends of the outer casing 61. The conductive sheet 63, the pulling frame 64 and the pulling rod are each provided with two groups. The two conductive sheets 63 are both arranged at the two ends of the piezoelectric ceramic 62. The two pulling frames 64 are respectively fixedly connected to the corresponding conductive sheets 63. One end of the pulling rod is rotatably mounted on the corresponding pulling frame 64. Reference Figure 6 and Figure 7 A hollow closed ring cavity 211 is fixedly sleeved on the outer wall of the innermost circle cooling pipe 21, the coil 65 is wound on the outer wall of the cooling pipe 21 in the closed ring cavity 211, the other end of the pull rod is rotatably mounted on the outer wall of the closed ring cavity 211, two wires are buried in the pulling frame 64 and the pull rod, one end of the wire is respectively connected to the two ends of the coil 65, and the other end is respectively electrically connected to the two conductive sheets 63; When the adjacent cooling pipes 21 move away from each other, the two pull rods squeeze the two ends of the piezoelectric ceramic 62 through the corresponding conductive sheets 63 .

[0053] When the turntable 58 drives the cooling pipes 21 of the innermost circle to move away from each other, the pull rod pulls the corresponding pulling frame 64, so that the two pulling frames 64 drive the conductive sheet 63 to squeeze the two ends of the piezoelectric ceramic 62. The potential difference generated at the two ends of the piezoelectric ceramic 62 is connected to the coil 65 through a wire, so that current is generated in the coil 65, thereby generating a magnetic field around the coil 65. The magnetic field can increase the turbulence of the cooling water with conductive ions in the cooling pipe 21. The turbulence makes the heat diffuse in the water faster, increases the contact frequency between the liquid and the cooling water, and improves the heat exchange efficiency.

[0054] A magnetic field detection mechanism for detecting the magnitude of the magnetic field generated by the coil 65 is provided in the closed ring cavity 211. The magnetic field detection mechanism is electrically connected to the controller. The magnetic field detection mechanism can use a Hall effect sensor for measurement, which will not be described in detail in this embodiment.

[0055] The ion concentration detection mechanism includes conductivity sensors 311 disposed on the cooling inlet pipe 31 and the cooling outlet pipe 32. Both conductivity sensors 311 are electrically connected to the controller. The conductivity sensors 311 can detect the concentration of conductive ions in the cooling water, so that the ion concentration adjustment mechanism 7 can keep the conductive ions in the cooling water within a suitable range, which is convenient for the continuous electromagnetic excitation.

[0056] Reference Figure 1 and Figure 2 The ion concentration regulating mechanism 7 includes an electromagnetic switching valve 71, a water injection pipe 72 and a conductive ion adding pipe 73 which are arranged on the cooling inlet pipe 31. The electromagnetic switching valve 71 is electrically connected to the controller. The inlet end of the electromagnetic switching valve 71 is connected to the water injection pipe 72 and the conductive ion adding pipe 73 respectively. The water injection pipe 72 and the conductive ion adding pipe 73 are connected to the external water supply system and the conductive ion supply system respectively. The outlet end of the electromagnetic switching valve 71 is connected to the inner cavity of the cooling inlet pipe 31. The electromagnetic switching valve 71 is used to connect the water injection pipe 72 or the conductive ion adding pipe 73 with the inner cavity of the cooling inlet pipe 31.

[0057] When the concentration of conductive ions in the cooling water is less than the set value, the electromagnetic switching valve 71 switches the conductive ion adding pipe 73 to communicate with the inner cavity of the cooling inlet pipe 31, and adds conductive ions into the cooling inlet pipe 31, thereby increasing the ion concentration in the cooling water to a suitable range. When the ion concentration in the cooling water is greater than the set value, the electromagnetic switching valve 71 switches the water injection pipe 72 to communicate with the inner cavity of the cooling inlet pipe 31, and adds clean water into the cooling inlet pipe 31, thereby reducing the ion concentration in the cooling water to a suitable range, so that the electromagnetic excitation can be carried out for a long time.

[0058] The implementation principle of a water circulation control device for a vacuum pump group in an embodiment of the present application is as follows: when the load pressure of the water ring vacuum pump 1 changes, the load pressure detection mechanism can detect its size to determine whether the load is in a high pressure or low pressure state at this time.

[0059] If it is in a low-pressure state, no adjustment is required or the distance adjustment mechanism 5 is adjusted to make the innermost circle of cooling pipes 21 move toward each other. At this time, the flow rate of the liquid inlet pipe 11 entering the cooling channel 22 is reduced, and the flow velocity is increased, which increases the turbulence of the liquid flow. The turbulent flow makes the heat exchange between the water flow and the cooling pipe 21 more intense, so that the cooling water can more effectively take away heat from the cooling pipe 21 and reduce the water ring temperature of the water ring vacuum pump 1.

[0060] The increase in the speed of the liquid not only improves the heat exchange efficiency, but also means a higher heat conduction capacity per unit time, which can promptly take away the heat generated inside the water ring vacuum pump 1, and avoid the water ring temperature being too high and affecting the working performance of the pump.

[0061] If it is in a high pressure state, adjust the distance adjustment mechanism 5 to make the innermost circle cooling pipes 21 move away from each other. At this time, the flow rate of the liquid inlet pipe 11 entering the cooling channel 22 increases, and the flow rate decreases. Too fast water flow may cause uneven cooling effect, and even excessive local water flow may increase the wear of the inner wall of the water ring vacuum pump 1 pipe and bubble formation.

[0062] Slowing down the flow rate helps the liquid flow more evenly in the pipe, avoids bubbles or excessive turbulence, and maintains the stability of the cooling system. Under high load pressure, the vacuum pump generates a lot of heat. At this time, moderately reducing the flow rate helps the liquid to better contact the cooling pipe 21 in the cooling channel 22, increases the heat exchange time, ensures that the cooling water can continue to absorb heat, and avoids overheating of the equipment caused by excessive temperature.

[0063] When in a high-pressure state, the electromagnetic excitation mechanism 6 can also be controlled to improve the heat exchange efficiency between the cooling water and the liquid, thereby achieving a better cooling effect. The ion concentration detection mechanism and the ion concentration adjustment mechanism 7 can cooperate with the electromagnetic excitation mechanism 6 to achieve a more perfect cooling control of the liquid ring in the water ring vacuum pump 1, while also achieving energy savings without causing unnecessary energy waste.

[0064] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A water circulation control device for a vacuum pump group, comprising a heat exchange mechanism, for circulating and cooling the water ring of a water ring vacuum pump, characterized in that: The heat exchange mechanism comprises a heat exchange shell (2) and a plurality of cooling pipes (21) arranged at intervals in the heat exchange shell (2), each of the cooling pipes (21) being arranged in a multi-layer circumferential shape, and a cooling channel (22) is reserved between each of the cooling pipes (21) and the heat exchange shell (2); The water ring vacuum pump comprises a liquid inlet pipe (11) and a liquid outlet pipe (12), the liquid inlet pipe (11) and the liquid outlet pipe (12) are respectively provided with a load pressure detection mechanism for detecting the load pressure of the water ring vacuum pump (1), both ends of the heat exchange shell (2) are provided with a distance adjustment mechanism (5) for adjusting the distance between the innermost circle cooling pipes (21), and an electromagnetic excitation mechanism (6) is provided between the innermost circle adjacent cooling pipes (21); It also includes an ion concentration detection mechanism for detecting the concentration of conductive ions in cooling water entering or flowing out of the cooling pipe (21), and an ion concentration adjustment mechanism (7) for adjusting the concentration of conductive ions in cooling water entering or flowing out of the cooling pipe (21).

2. A water circulation control device for a vacuum pump group according to claim 1, characterized in that: The liquid inlet pipe (11) and the liquid outlet pipe (12) are respectively opposite to the center of the two ends of the heat exchange shell (2) and are connected to the cooling channel (22); the ends of the cooling pipes (21) on the same side are connected to each other; a water storage tank (3), a water pump (4), and a cooling inlet pipe (31) and a cooling outlet pipe (32) for connecting the ends of the cooling pipes (21) to the water storage tank (3) and the water pump (4) in sequence are arranged outside the heat exchange shell (2); the water storage tank (3) is filled with cooling water for cooling the liquid of the water ring vacuum pump (1); The load pressure detection mechanism comprises pressure sensors and a controller arranged on the liquid inlet pipe (11) and the liquid outlet pipe (12); the two pressure sensors are capable of detecting the pressure of liquid flowing through the liquid inlet pipe (11) and the liquid outlet pipe (12); and the controller is electrically connected to the two pressure sensors.

3. A water circulation control device for a vacuum pump group according to claim 2, characterized in that: The distance adjustment mechanism (5) comprises a driving member (51), a gear (52), a transmission assembly and a turntable (58); the turntable (58) is rotatably mounted in the heat exchange shell (2); and a plurality of arc grooves (581) are provided on the turntable (58) corresponding to each innermost circle cooling pipe (21); and the end of each cooling pipe (21) is slidably engaged in the corresponding arc groove (581); the driving member (51) is mounted on the liquid inlet pipe (11) or the liquid outlet pipe (12) and is electrically connected to the controller; the gear (52) is coaxially fixed to the output end of the driving member (51); and the transmission assembly is respectively arranged inside and outside the liquid inlet pipe (11) or the liquid outlet pipe (12) to enable the gear (52) to drive the turntable (58) to rotate.

4. A water circulation control device for a vacuum pump unit according to claim 3, characterized in that: The transmission assembly comprises an outer gear ring (53), a first permanent magnet (54), a second permanent magnet (55), a connecting rod (56) and a rotating shaft (57); the outer gear ring (53) is coaxially rotatably mounted on the outside of the liquid inlet pipe (11) or the liquid outlet pipe (12); the outer gear ring (53) is meshed with the gear (52); a plurality of the first permanent magnets (54) are provided, and the plurality of the first permanent magnets (54) are embedded on the inner wall of the outer gear ring (53) at intervals; the rotating shaft (57) is coaxially fixed with the rotating axis of the rotating disk (58); One end of the rotating shaft (57) away from the rotating disk (58) is fixedly connected to the connecting rod (56); a plurality of second permanent magnets (55) are provided corresponding to each of the first permanent magnets (54); each of the second permanent magnets (55) is fixed to an end of the connecting rod (56) and corresponds one-to-one to each of the first permanent magnets (54); each of the second permanent magnets (55) is slidably mounted on the inner wall of the liquid inlet pipe (11) or the liquid outlet pipe (12); each of the second permanent magnets (55) has opposite magnetic properties to the corresponding first permanent magnet (54) and is arranged directly opposite to each other.

5. A water circulation control device for a vacuum pump unit according to claim 4, characterized in that: A plurality of open fixing rods (571) are arranged between the rotating shaft (57) and the rotating disk (58); one end of each fixing rod (571) is fixed to the end of the rotating shaft (57), and the other end is fixed to a position of the rotating disk (58) away from the rotation axis, and the rotating disk (58) is hollowed out.

6. A water circulation control device for a vacuum pump unit according to claim 2, characterized in that: The electromagnetic excitation mechanism (6) comprises an outer sheath (61), a piezoelectric ceramic (62), a conductive sheet (63), a pulling frame (64), a pulling rod and a coil (65); the outer sheath (61) is arranged between the innermost circle of adjacent cooling pipes (21) and is closed at both ends; the piezoelectric ceramic (62) is fixed in the outer sheath (61) and its two ends are respectively opposite to the two ends of the outer sheath (61); the conductive sheet (63), the pulling frame (64) and the pulling rod are each provided in two groups; the two conductive sheets (63) are each arranged at the two ends of the piezoelectric ceramic (62); the two pulling frames (64) are respectively fixedly connected to the corresponding conductive sheets (63); and one end of the pulling rod is rotatably mounted on the corresponding pulling frame (64); A hollow closed annular cavity (211) is fixedly sleeved on the outer wall of the innermost circle cooling pipe (21), the coil (65) is wound on the outer wall of the cooling pipe (21) in the closed annular cavity (211), the other end of the pull rod is rotatably mounted on the outer wall of the closed annular cavity (211), two conductive wires are embedded in the pulling frame (64) and the pull rod, one end of the conductive wire is respectively connected to the two ends of the coil (65), and the other end is respectively electrically connected to the two conductive sheets (63); When the adjacent cooling pipes (21) move in directions away from each other, the two pull rods squeeze the two ends of the piezoelectric ceramic (62) through the corresponding conductive sheets (63).

7. A water circulation control device for a vacuum pump unit according to claim 6, characterized in that: A magnetic field detection mechanism for detecting the magnitude of the magnetic field generated by the coil (65) is provided in the closed ring cavity (211), and the magnetic field detection mechanism is electrically connected to the controller.

8. The water circulation control device for a vacuum pump unit according to claim 2, characterized in that: The ion concentration detection mechanism comprises a conductivity sensor (311) arranged on the cooling inlet pipe (31) and the cooling outlet pipe (32), and both of the conductivity sensors (311) are electrically connected to the controller.

9. The water circulation control device for a vacuum pump unit according to claim 2, characterized in that: The ion concentration regulating mechanism (7) comprises an electromagnetic switching valve (71), a water injection pipe (72) and a conductive ion addition pipe (73) arranged on the cooling inlet pipe (31); the electromagnetic switching valve (71) is electrically connected to the controller; the inlet end of the electromagnetic switching valve (71) is respectively connected to the water injection pipe (72) and the conductive ion addition pipe (73); the water injection pipe (72) and the conductive ion addition pipe (73) are respectively connected to an external water supply system and a conductive ion supply system; the outlet end of the electromagnetic switching valve (71) is connected to the inner cavity of the cooling inlet pipe (31); the electromagnetic switching valve (71) is used to connect the water injection pipe (72) or the conductive ion addition pipe (73) to the inner cavity of the cooling inlet pipe (31).

10. The water circulation control device for a vacuum pump unit according to claim 2, characterized in that: The two ends of the water storage tank (3) are respectively connected to the cooling inlet pipe (31) and the cooling outlet pipe (32), and the cooling inlet pipe (31) is connected to the top of the water storage tank (3), and the cooling outlet pipe (32) is connected to the bottom of the water storage tank (3). Multiple layers of cooling fins are sequentially arranged from top to bottom in the water storage tank (3) for cooling the cooling water entering the water storage tank (3).

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