Stainless steel electric control valve

Abstract

The invention discloses a stainless steel electric regulating valve, and particularly relates to the technical field of electric regulating valves, the stainless steel electric regulating valve comprises a valve body, a driving assembly, a valve core assembly and a connecting assembly, a liquid inlet cavity, a liquid outlet cavity and a regulating cavity are formed in the valve body, and the valve core assembly is arranged in the regulating cavity; the valve element assembly can seal and communicate the liquid inlet cavity and the adjusting cavity through movement, the connecting assembly comprises a connecting cavity formed in the upper end of the adjusting cavity, a pressure adjusting cylinder is arranged at the upper end of the connecting cavity, and a first piston cylinder and a second piston cylinder are arranged in the connecting cavity. By arranging the first valve element, the second valve element and the pressure adjusting cylinder, liquid is prevented from forming vortex at the bottom of the valve body, the water hammer effect of the electric control valve is buffered, meanwhile, error correction is conducted on the electric control valve after the electric control valve is completely opened every time, and the safety of the electric control valve is improved. Therefore, the flow control precision is improved, and the service life of the electric control valve is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric regulating valves, and more specifically, to a stainless steel electric regulating valve. Background Art

[0002] Electric control valve is a vital equipment in the field of industrial automation control. It is based on motor drive technology and advanced control theory, combined with mechanical design and fluid mechanics principles, and adjusts the flow, pressure and other parameters of the fluid by changing the relative position between the valve core and the valve seat. Its development integrates the achievements of multiple fields such as electronic technology and automation technology to adapt to the complex process in many industries such as chemical, petroleum, electric power, and pharmaceuticals, and provides reliable technical support for improving production efficiency, ensuring product quality and ensuring production safety.

[0003] However, in the prior art, when the regulating valve is opened to a small extent, the flow cross-sectional area is small, and a small displacement of the valve core may cause excessive flow changes. At the same time, the unbalanced force on the valve core is large, and vortices are easily formed at the bottom of the valve core, affecting the flow stability. During the long-term use of the regulating valve, the control accuracy will also be affected due to the errors generated. Moreover, when the regulating valve is closed, the pressure on the valve core increases instantly due to the water hammer, causing a large impact on the valve core, which is easy to damage the valve core. Therefore, the present invention proposes a stainless steel electric regulating valve to solve the above problems. Summary of the invention

[0004] In order to overcome the defects in the above-mentioned background technology, an embodiment of the present invention provides a stainless steel electric regulating valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stainless steel electric regulating valve, comprising: a valve body, a driving assembly, a valve core assembly and a connecting assembly, wherein the valve body is provided with a liquid inlet chamber, a liquid outlet chamber and a regulating chamber; the valve core assembly is arranged inside the regulating chamber, and the valve core assembly can seal and connect the liquid inlet chamber and the regulating chamber by moving, and the valve core assembly comprises a first valve core and a second valve core, a guide groove is arranged at the bottom of the first valve core, and the second valve core can divert the liquid in the liquid inlet chamber and enter the regulating chamber through the guide groove at the bottom of the first valve core; the connecting assembly comprises a connecting chamber arranged at the upper end of the regulating chamber, a pressure regulating cylinder is arranged at the upper end of the connecting chamber, and a first piston cylinder and a second piston cylinder are arranged inside the connecting chamber, and when the stainless steel electric regulating valve is fully opened, the first piston cylinder and the second piston cylinder can adjust the internal pressure through the pressure regulating cylinder.

[0006] Preferably, a buffer cavity is provided at the lower end of the regulating cavity, and a through hole communicating with the liquid inlet cavity is opened inside the buffer cavity. When the pressure at the bottom of the first valve core is too high, the liquid inside the liquid inlet cavity can enter the buffer cavity through the through hole for buffering.

[0007] Preferably, a plurality of diversion grooves are evenly distributed at the bottom of the first valve core. An inlet is formed at the bottom of the first valve core. The first valve core is provided with an inner cavity. The inlet is communicated with the inner cavity of the first valve core. A plurality of outlets are formed on the outer wall of the first valve core. The inner cavity of the first valve core is communicated with the adjusting cavity through the outlets. The movement of the second valve core can control the sealing and communication of the inlet and the inner cavity of the first valve core.

[0008] Preferably, a second piston rod is fixedly connected to the upper end of the second valve core. The second piston rod passes through the first valve core, the adjusting cavity and the first piston cylinder and then extends into the second piston cylinder. A second piston is fixedly connected to the end of the second piston rod away from the second valve core. The second piston is slidably connected to the inner wall of the second piston cylinder.

[0009] Preferably, a first piston rod is sleeved on the outer wall of the second piston rod. One end of the first piston rod is fixedly connected to the top end of the first valve core. The end of the first piston rod away from the first valve core passes through the adjusting cavity and then extends into the first piston cylinder. A first piston is fixedly connected to the end of the first piston rod away from the first valve core. The first piston is slidably connected to the inner wall of the first piston cylinder.

[0010] Preferably, the driving assembly includes a driving cavity fixedly connected to the upper end of the connecting cavity. One end of a pressure regulating cylinder is fixedly connected to the inner bottom surface of the driving cavity. A first ventilation hole is formed at the bottom of the pressure regulating cylinder. A second ventilation hole is formed at the bottom of the driving cavity. A sliding groove is formed at the bottom of the driving cavity. The first ventilation hole is communicated with the second ventilation hole through the sliding groove. A slider is slidably connected in the sliding groove. A sealing column is fixedly connected to the upper end of the slider. The movement of the sealing column can seal the first ventilation hole. A first pressing plate is slidably connected in the pressure regulating cylinder. A second elastic member is arranged in the pressure regulating cylinder. One end of the second elastic member is fixedly connected to the first pressing plate. The other end of the second elastic member is fixedly connected to the inner top surface of the pressure regulating cylinder. A third elastic member is arranged in the sliding groove. One end of the third elastic member is connected to the bottom of the sliding groove. The other end of the third elastic member is connected to the slider.

[0011] Preferably, an air cylinder is fixedly connected to the bottom of the driving cavity. A through hole communicated with the second piston cylinder is formed at the bottom of the air cylinder. A fourth ventilation hole is formed at the bottom of the second piston cylinder. A third ventilation hole is formed at the bottom of the first piston cylinder. The third ventilation hole and the fourth ventilation hole are connected through a flexible hose. A fifth ventilation hole is formed at the bottom of the first piston cylinder. The fifth ventilation hole and the second ventilation hole are connected through a flexible hose. Through holes communicated with the outside are arranged inside both the first piston cylinder and the second piston cylinder.

[0012] Preferably, a buffer plate is slidably connected inside the buffer cavity, a first elastic member is arranged inside the buffer cavity, one end of the first elastic member is fixedly connected to one end of the buffer plate, and the other end of the first elastic member is fixedly connected to the inner bottom surface of the buffer cavity.

[0013] Preferably, an air groove is formed on the side wall of the valve body, the air groove communicates with the bottom of the buffer cavity, an elastic seal is arranged at the bottom communication port of the adjustment cavity, the elastic seal contacts the outer wall of the first valve core, and one end of the elastic seal away from the first valve core is connected to the air groove.

[0014] Preferably, a motor is fixedly connected to the outer wall of the drive cavity, the output end of the motor extends into the drive cavity, a coupling is arranged inside the drive cavity, the coupling is connected to the output end of the motor, a lead screw is fixedly connected to the inner bottom surface of the drive cavity, one end of the lead screw away from the inner bottom surface of the drive cavity penetrates through the air cylinder and is connected to the coupling, a second pressure plate is sleeved on the outer wall of the lead screw, the second pressure plate is slidably connected to the inner wall of the air cylinder, the inner wall of the second pressure plate meshes with the lead screw, and a runner is fixedly connected to the top of the drive cavity, and the runner is connected to the coupling.

[0015] The technical effects and advantages of the present invention: 1. By setting the first valve core and the second valve core in the present invention, when the opening degree of the regulating valve is small, the first valve core adjusts the flow rate. At this time, the flow rate change caused by the valve core displacement is small, ensuring the stability of the flow rate and improving the control accuracy of the flow rate.

[0016] 2. By setting the pressure regulating cylinder in the present invention, error correction is performed on the positions of the first valve core and the second valve core of the regulating valve after each complete opening of the regulating valve, reducing the cumulative error, so that the regulating valve can still effectively ensure the control accuracy of the flow rate under long-term use.

[0017] 3. By diverting the medium at the valve core when the opening degree of the regulating valve is small in the present invention, it is prevented that the flow velocity at the valve core of the regulating valve is too fast and eddy currents are generated under the condition of small opening degree, affecting the stability of the flow rate and the service life of the regulating valve.

[0018] 4. By buffering the water hammer effect when closing the regulating valve in the present invention, the seal is squeezed at the same time to prevent the pressure on the valve core from increasing instantaneously due to the water hammer effect and damaging the valve core, and to avoid liquid leakage in the valve due to the instantaneous increase in pressure. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the closed state of the overall structure of the present invention.

[0021] Figure 3 This is a cross-sectional view of the fully opened state of the overall structure of the present invention.

[0022] Figure 4 This is a cross-sectional view of the opened state of the second spool of the present invention.

[0023] Figure 5 For the present invention Figure 2 The enlarged view of the structure at position A in the present invention.

[0024] Figure 6 For the present invention Figure 3 The enlarged view of the structure at position B in the present invention.

[0025] Figure 7 For the present invention Figure 2 The enlarged view of the structure at position C in the present invention.

[0026] Figure 8 This is a cross-sectional view of the overall structure of the valve body of the present invention.

[0027] Figure 9 This is a schematic diagram of the overall structure of the first spool of the present invention.

[0028] Reference numerals are: 1, valve body; 11, liquid inlet cavity; 12, liquid outlet cavity; 13, adjustment cavity; 14, buffer cavity; 141, buffer plate; 142, first elastic member; 2, drive assembly; 21, drive cavity; 22, air cylinder; 23, motor; 24, runner; 25, second pressing plate; 3, spool assembly; 31, first spool; 311, flow guiding groove; 312, first piston rod; 313, first piston; 32, second spool; 321, second piston rod; 322, second piston; 4, connection assembly; 41, connection cavity; 42, pressure regulating cylinder; 421, first ventilation hole; 422, second ventilation hole; 423, sealing column; 424, first pressing plate; 425, second elastic member; 43, first piston cylinder; 431, third ventilation hole; 432, fifth ventilation hole; 44, second piston cylinder; 441, fourth ventilation hole. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1 In the actual use process, it is found that when the opening degree of the regulating valve is small, the flow cross-sectional area is small at this time, and a small displacement of the valve core may cause too large a change in the flow rate, thereby affecting the control accuracy. To solve the above problems, this embodiment is specifically invented.

[0031] Please refer to Figure 1 and Figure 4 As shown, the present invention provides a stainless steel electric regulating valve, including a valve body 1, a driving component 2, a valve core component 3 and a connecting component 4. An inlet liquid cavity 11, an outlet liquid cavity 12 and an adjusting cavity 13 are opened inside the valve body 1.

[0032] Please refer to Figure 2 and Figure 8 As shown, the connecting component 4 includes a connecting cavity 41 provided at the upper end of the adjusting cavity 13. A first piston cylinder 43 and a second piston cylinder 44 are provided inside the connecting cavity 41. Both the first piston cylinder 43 and the second piston cylinder 44 are provided with through holes communicating with the outside.

[0033] Please refer to Figure 2 and Figure 5 As shown, the valve core component 3 is arranged inside the adjusting cavity 13. The movement of the valve core component 3 can control the sealing and communication between the inlet liquid cavity 11 and the adjusting cavity 13. The valve core component 3 includes a first valve core 31 and a second valve core 32. A second piston rod 321 is fixedly connected to the upper end of the second valve core 32. The second piston rod 321 penetrates through the first valve core 31, the adjusting cavity 13 and the first piston cylinder 43 and then extends into the second piston cylinder 44. A second piston 322 is fixedly connected to the end of the second piston rod 321 away from the second valve core 32. The second piston 322 is slidably connected to the inner wall of the second piston cylinder 44. A first piston rod 312 is sleeved on the outer wall of the second piston rod 321. One end of the first piston rod 312 is fixedly connected to the top end of the first valve core 31. The end of the first piston rod 312 away from the first valve core 31 penetrates through the adjusting cavity 13 and then extends into the first piston cylinder 43. A first piston 313 is fixedly connected to the end of the first piston rod 312 away from the first valve core 31. The first piston 313 is slidably connected to the inner wall of the first piston cylinder 43.

[0034] Please refer to Figure 3 and Figure 6 As shown, a gas cylinder 22 is fixedly connected to the bottom of the driving cavity 21. A through hole communicating with the second piston cylinder 44 is opened at the bottom of the gas cylinder 22. Combining Figure 7 As shown, a fourth ventilation hole 441 is opened at the bottom of the second piston cylinder 44. A third ventilation hole 431 is opened at the bottom of the first piston cylinder 43. The third ventilation hole 431 and the fourth ventilation hole 441 are connected by a soft air pipe.

[0035] Please refer to Figure 2As shown in the figure, a motor 23 is fixedly connected to the outer wall of the driving cavity 21. The output end of the motor 23 extends into the interior of the driving cavity 21. A coupling is arranged inside the driving cavity 21, and the coupling is connected to the output end of the motor 23. A lead screw is fixedly connected to the inner bottom surface of the driving cavity 21. One end of the lead screw far from the inner bottom surface of the driving cavity 21 penetrates through the air cylinder 22 and is connected to the coupling. A second pressing plate 25 is sleeved on the outer wall of the lead screw. The second pressing plate 25 is slidably connected to the inner wall of the air cylinder 22. The inner wall of the second pressing plate 25 is engaged with the lead screw. A runner 24 is fixedly connected to the top of the driving cavity 21. The runner 24 is connected to the coupling. Among them, the coupling and the lead screw are both prior arts.

[0036] During use, first start the motor 23. The output shaft of the motor 23 drives the lead screw to rotate through the coupling. The rotation of the lead screw causes the second pressing plate 25 to slide downward inside the air cylinder 22 and squeeze the gas inside the air cylinder 22. The gas inside the air cylinder 22 enters the interior of the second piston cylinder 44 through the through hole. The entry of the gas into the interior of the second piston cylinder 44 causes the second piston 322 to drive the second piston rod 321 to move downward, so that the second piston rod 321 drives the second valve core 32 to slide downward. Since the fourth ventilation hole 441 is located at the bottom of the second piston cylinder 44, before the second piston 322 slides to the inner bottom surface of the second piston cylinder 44, the gas only enters the interior of the second piston cylinder 44 through the through hole. At this time, only the second valve core 32 moves downward, and the first valve core 31 remains in place. The liquid can only enter the adjustment cavity 13 through the liquid inlet of the first valve core 31 and flow into the liquid outlet cavity 12 through the adjustment cavity 13. At this time, the opening degree of the electric control valve is relatively small. When the second piston 322 slides to the inner bottom surface of the second piston cylinder 44, the gas can enter the interior of the first piston cylinder 43 through the fourth ventilation hole 441. At this time, continue to rotate the motor 23, and the second pressing plate 25 continues to slide downward. The gas enters the interior of the first piston cylinder 43 through the second piston cylinder 44. The continuous entry of the gas into the interior of the first piston cylinder 43 causes the first piston 313 to drive the first piston rod 312 to move upward, so that the first piston rod 312 drives the first valve core 31 to move upward, thereby gradually increasing the opening degree of the electric control valve. When the opening degree of the electric control valve is relatively small, since the displacement of the second valve core 32 causes a relatively small change in the flow cross-sectional area, it is possible to prevent the problem that a small displacement of the valve core may cause a large change in the flow rate and affect the control accuracy when the electric control valve is at a small opening degree.

[0037] Embodiment 2 During actual use, it is found that when the opening degree of the electric control valve is relatively small, due to the relatively large pressure in the liquid inlet cavity 11, the unbalanced force on the valve core is relatively large, and eddy currents are likely to form at the bottom of the valve core, affecting the stability of the flow rate. Further improvements are made on the basis of the above embodiment.

[0038] Please refer to Figure 2 and Figure 5As shown in the figure, a diversion groove 311 is provided at the bottom of the first valve core 31, and the second valve core 32 can divide the liquid in the liquid inlet cavity 11 and enter the adjustment cavity 13 through the diversion groove 311 at the bottom of the first valve core 31.

[0039] Please refer to Figure 9 As shown in the figure, there are multiple diversion grooves 311 which are evenly distributed at the bottom of the first valve core 31. An inlet port is provided at the bottom of the first valve core 31, and an inner cavity is provided in the first valve core 31. Combining Figure 2 and Figure 3 As shown in the figure, the inlet port is communicated with the inner cavity of the first valve core 31. A plurality of liquid outlet ports are provided on the outer wall of the first valve core 31. Combining Figure 4 As shown in the figure, the inner cavity of the first valve core 31 is communicated with the adjustment cavity 13 through the liquid outlet ports. The movement of the second valve core 32 can control the sealing and communication of the inlet port and the inner cavity of the first valve core 31. Combining Figure 5 As shown in the figure, the bottom of the second valve core 32 is of a streamlined structure.

[0040] During use, when the opening degree of the electric control valve is relatively small, when the liquid passes through the second valve core 32 and enters the inlet port, due to the streamlined structure of the second valve core 32, the liquid at the bottom of the second valve core 32 is divided. Part of the liquid is diverted to the bottom of the first valve core 31, and the liquid at the bottom of the first valve core 31 enters the inlet port through the diversion groove 311, and then enters the adjustment cavity 13 through the inner cavity of the first valve core 31. By diverting the liquid, when the opening degree of the control valve is relatively small, the smoothness of the liquid entering the adjustment cavity 13 is ensured, and further, the problem that the eddy current at the bottom of the first valve core 31 and the second valve core 32 affects the flow stability is prevented.

[0041] Embodiment III During actual use, it is found that when the electric control valve is closed after use, due to the water hammer effect, the pressure on the valve core increases instantaneously, causing a large impact on the valve core, which is likely to damage the valve core. At the same time, it may cause the problem that the liquid leaks from the sealing place due to the impact. Further improvements are made on the basis of the above embodiments.

[0042] Please refer to Figure 2 and Figure 5 As shown in the figure, a buffer cavity 14 is provided at the lower end of the adjustment cavity 13. A through hole communicating with the liquid inlet cavity 11 is provided inside the buffer cavity 14. When the pressure at the bottom of the first valve core 31 is too high, the liquid inside the liquid inlet cavity 11 can enter the buffer cavity 14 through the through hole for buffering.

[0043] Please refer to Figure 4As shown, a buffer plate 141 is slidably connected inside the buffer chamber 14. A first elastic member 142 is arranged inside the buffer chamber 14. One end of the first elastic member 142 is fixedly connected to one end of the buffer plate 141, and the other end of the first elastic member 142 is fixedly connected to the inner bottom surface of the buffer chamber 14. An air groove is formed on the side wall of the valve body 1, and the air groove communicates with the bottom of the buffer chamber 14. An elastic seal is arranged at the bottom communication port of the adjustment chamber 13, and the elastic seal contacts the outer wall of the first valve core 31. One end of the elastic seal away from the first valve core 31 is connected to the air groove. The first elastic member 142 is a spring, which is used for the buffer chamber 14 to communicate with the liquid inlet chamber 11, and the through hole is located above the buffer plate 141.

[0044] Based on the above embodiments, during use, when the electric control valve is closed after use, at this time, due to the water hammer effect, the pressure on the first valve core 31 and the second valve core 32 will increase instantaneously. The liquid inside the liquid inlet chamber 11 will impact the first valve core 31 and the second valve core 32. At this time, the liquid is shunted by the second valve core 32, so that the liquid impacts the inner wall of the liquid inlet chamber 11. Due to the action of the pressure, the liquid enters the inside of the buffer chamber 14 through the through hole. The liquid continuously enters the inside of the buffer chamber 14 due to the impact force, so that the buffer plate 141 slides inside the buffer chamber 14. The first elastic member 142 is compressed by the buffer plate 141 to buffer the water hammer effect on the electric control valve. While the buffer plate 141 slides, the gas inside the buffer chamber 14 squeezes the elastic seal through the air groove, so that the pressure on the elastic seal increases, thereby making the elastic seal fit more tightly with the first valve core 31, preventing the problem of leakage caused by the sudden increase in liquid pressure and the liquid seeping out of the elastic seal.

[0045] Embodiment Four During actual use, it is found that during the long-term use of the electric control valve, due to errors, it is easy to cause the problem of insufficient control accuracy. Further improvements are made based on the above embodiments.

[0046] Please refer to Figure 3 and Figure 5 As shown, a pressure regulating cylinder 42 is arranged at the upper end of the connection chamber 41. When the stainless steel electric control valve is fully open, the first piston cylinder 43 and the second piston cylinder 44 can adjust the internal pressure through the pressure regulating cylinder 42.

[0047] Please refer to Figure 5As shown, the driving assembly 2 includes a driving chamber 21 fixedly connected to the upper end of the connection chamber 41. One end of the pressure regulating cylinder 42 is fixedly connected to the inner bottom surface of the driving chamber 21. A first ventilation hole 421 is formed at the bottom of the pressure regulating cylinder 42, a second ventilation hole 422 is formed at the bottom of the driving chamber 21, and a sliding groove is formed at the bottom of the driving chamber 21. The first ventilation hole 421 and the second ventilation hole 422 are connected through the sliding groove. A slider is slidably connected in the sliding groove, and a sealing column 423 is fixedly connected to the upper end of the slider. The movement of the sealing column 423 can seal the first ventilation hole 421. A first pressing plate 424 is slidably connected in the pressure regulating cylinder 42, and a second elastic member 425 is arranged in the pressure regulating cylinder 42. One end of the second elastic member 425 is fixedly connected to the first pressing plate 424, and the other end of the second elastic member 425 is fixedly connected to the inner top surface of the pressure regulating cylinder 42. A third elastic member is arranged in the sliding groove. One end of the third elastic member is connected to the bottom of the sliding groove, and the other end of the third elastic member is connected to the slider. A fifth ventilation hole 432 is formed at the bottom of the first piston cylinder 43, and the fifth ventilation hole 432 is connected to the second ventilation hole 422 through a flexible hose. The second elastic member 425 is a spring, and the third elastic member is an airbag, both of which are prior arts and will not be elaborated here.

[0048] Based on the above embodiments, during use, when the second valve core 32 is fully opened, at this time, the second pressing plate 25 continues to move downward. The gas inside the air cylinder 22 enters the first piston cylinder 43 through the fourth ventilation hole 441 and the third ventilation hole 431. As the gas continuously enters the first piston cylinder 43, the first piston 313 drives the first piston rod 312 to slide upward. The upward sliding of the first piston rod 312 drives the first valve core 31 to move upward. When the second pressing plate 25 slides downward to the limit position, the second pressing plate 25 pushes the slider to squeeze the third elastic member, and at the same time, the sealing column 423 no longer seals the first ventilation hole 421, and the pressure regulating cylinder 42 is connected to the first piston cylinder 43. When the second pressing plate 25 moves to the limit position but the first valve core 31 does not move to the limit position, at this time, the second elastic member 425 inside the pressure regulating cylinder 42 expands to drive the first pressing plate 424 to squeeze the gas inside the pressure regulating cylinder 42, so that the gas pressure inside the pressure regulating cylinder 42 is greater than the pressure inside the first piston cylinder 43. Thus, the gas inside the pressure regulating cylinder 42 enters the first piston cylinder 43 through the first ventilation hole 421, adjusting the pressures inside the first piston cylinder 43, the second piston cylinder 44, and the air cylinder 22, so that each time during use when the second pressing plate 25 moves to the limit position, error correction is performed on the electric control valve to prevent the problem of insufficient control accuracy easily caused by errors during the long-term use of the electric control valve.

[0049] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A stainless steel electric regulating valve, comprising a valve body (1) and a drive assembly (2), wherein the valve body (1) is provided with a liquid inlet chamber (11), a liquid outlet chamber (12) and a regulating chamber (13), and characterized in that: Also includes: A valve core assembly (3), the valve core assembly (3) being arranged inside the regulating chamber (13), the valve core assembly (3) being capable of changing the connection state between the liquid inlet chamber (11) and the regulating chamber (13) by moving, the valve core assembly (3) comprising a first valve core (31) and a second valve core (32), the first valve core (31) being provided with a guide groove (311) at the bottom, the second valve core (32) being capable of diverting liquid in the liquid inlet chamber (11) and allowing the liquid to enter the regulating chamber (13) through the guide groove (311); A connecting assembly (4), the connecting assembly (4) comprising a connecting chamber (41) arranged at the upper end of the regulating chamber (13), a pressure regulating cylinder (42) being arranged at the upper end of the connecting chamber (41), a first piston cylinder (43) and a second piston cylinder (44) being arranged inside the connecting chamber (41), and when the stainless steel electric regulating valve is fully opened, the first piston cylinder (43) and the second piston cylinder (44) can regulate the internal pressure through the pressure regulating cylinder (42).

2. The stainless steel electric regulating valve according to claim 1, characterized in that: A buffer chamber (14) is provided at the lower end of the regulating chamber (13), and a through hole communicating with the liquid inlet chamber (11) is provided inside the buffer chamber (14). When the pressure at the bottom of the first valve core (31) is too high, liquid inside the liquid inlet chamber (11) can enter the buffer chamber (14) through the through hole for buffering.

3. The stainless steel electric regulating valve according to claim 2 is characterized in that: The guide grooves (311) are multiple and evenly distributed at the bottom of the first valve core (31); a liquid inlet is provided at the bottom of the first valve core (31); the first valve core (31) is provided with an inner cavity; the liquid inlet is connected to the inner cavity of the first valve core (31); a plurality of liquid outlets are provided on the outer wall of the first valve core (31); the inner cavity of the first valve core (31) is connected to the regulating cavity (13) via the liquid outlets; the movement of the second valve core (32) can control the liquid inlet and the inner cavity of the first valve core (31) to be sealed and connected.

4. The stainless steel electric regulating valve according to claim 3 is characterized in that: The upper end of the second valve core (32) is fixedly connected to a second piston rod (321); the second piston rod (321) penetrates the first valve core (31), the regulating chamber (13) and the first piston cylinder (43) and then extends into the interior of the second piston cylinder (44); an end of the second piston rod (321) away from the second valve core (32) is fixedly connected to a second piston (322); the second piston (322) is slidably connected to the inner wall of the second piston cylinder (44).

5. The stainless steel electric regulating valve according to claim 4, characterized in that: The outer wall of the second piston rod (321) is sleeved with a first piston rod (312); one end of the first piston rod (312) is fixedly connected to the top end of the first valve core (31); the end of the first piston rod (312) away from the first valve core (31) passes through the regulating chamber (13) and then extends into the first piston cylinder (43); the end of the first piston rod (312) away from the first valve core (31) is fixedly connected to the first piston (313); the first piston (313) is slidably connected to the inner wall of the first piston cylinder (43).

6. The stainless steel electric regulating valve according to claim 5, characterized in that: The driving assembly (2) comprises a driving chamber (21) fixedly connected to the upper end of the connecting chamber (41); one end of a pressure regulating cylinder (42) is fixedly connected to the inner bottom surface of the driving chamber (21); a first vent hole (421) is provided at the bottom of the pressure regulating cylinder (42); a second vent hole (422) is provided at the bottom of the driving chamber (21); a slide groove is provided at the bottom of the driving chamber (21); the first vent hole (421) and the second vent hole (422) are connected via the slide groove; a slider is slidably connected in the slide groove; a sealing column (42) is fixedly connected to the upper end of the slider 3), the sealing column (423) can move to seal the first vent hole (421), a first pressure plate (424) is slidably connected in the pressure regulating cylinder (42), a second elastic member (425) is arranged in the pressure regulating cylinder (42), one end of the second elastic member (425) is fixedly connected to the first pressure plate (424), the other end of the second elastic member (425) is fixedly connected to the inner top surface of the pressure regulating cylinder (42), a third elastic member is arranged in the slide groove, one end of the third elastic member is connected to the bottom of the slide groove, and the other end of the third elastic member is connected to the slider.

7. The stainless steel electric regulating valve according to claim 6, characterized in that: The bottom of the driving chamber (21) is fixedly connected to an air cylinder (22), the bottom of the air cylinder (22) is provided with a through hole connected to the second piston cylinder (44), the bottom of the second piston cylinder (44) is provided with a fourth air hole (441), the bottom of the first piston cylinder (43) is provided with a third air hole (431), the third air hole (431) and the fourth air hole (441) are connected via a soft air tube, the bottom of the first piston cylinder (43) is provided with a fifth air hole (432), the fifth air hole (432) and the second air hole (422) are connected via a soft air tube, and the first piston cylinder (43) and the second piston cylinder (44) are both provided with through holes connected to the outside.

8. The stainless steel electric regulating valve according to claim 7, characterized in that: A buffer plate (141) is slidably connected to the interior of the buffer cavity (14), a first elastic member (142) is provided inside the buffer cavity (14), one end of the first elastic member (142) is fixedly connected to one end of the buffer plate (141), and the other end of the first elastic member (142) is fixedly connected to the inner bottom surface of the buffer cavity (14).

9. The stainless steel electric regulating valve according to claim 8, characterized in that: An air groove is provided on the side wall of the valve body (1), the air groove is connected to the bottom of the buffer chamber (14), an elastic seal is provided at the bottom communication port of the regulating chamber (13), the elastic seal is in contact with the outer wall of the first valve core (31), and one end of the elastic seal away from the first valve core (31) is connected to the air groove.

10. The stainless steel electric regulating valve according to claim 9, characterized in that: The outer wall of the drive chamber (21) is fixedly connected to a motor (23), the output end of the motor (23) extends into the drive chamber (21), a coupling is arranged inside the drive chamber (21), the coupling is connected to the output end of the motor (23), a lead screw is fixedly connected to the inner bottom surface of the drive chamber (21), one end of the lead screw away from the inner bottom surface of the drive chamber (21) passes through the air cylinder (22) and is connected to the coupling, a second pressure plate (25) is sleeved on the outer wall of the lead screw, the second pressure plate (25) is slidably connected to the inner wall of the air cylinder (22), the inner wall of the second pressure plate (25) is meshed with the lead screw, and a rotating wheel (24) is fixedly connected to the top of the drive chamber (21), the rotating wheel (24) is connected to the coupling.

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