A stainless steel electric regulating valve

Abstract

The present invention discloses a stainless steel electric regulating valve, which specifically relates to the technical field of electric regulating valves, including a valve body, a drive assembly, a valve core assembly and a connecting assembly. A liquid inlet chamber, a liquid outlet chamber and a regulating chamber are provided inside the valve body, and the valve core assembly is arranged inside the regulating chamber. The valve core assembly can seal and connect the liquid inlet chamber and the regulating chamber by moving. The connecting assembly includes 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. 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. The present invention prevents the liquid from forming a vortex at the bottom of the valve body by arranging the first valve core, the second valve core and the pressure regulating cylinder, buffers the water hammer effect of the electric regulating valve, and at the same time performs error correction on the electric regulating valve after each full opening, thereby improving the control accuracy of the flow rate and increasing the service life of the electric regulating valve.

Description

Technical Field

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

[0002] Electric control valves are crucial devices in the field of industrial automation and control. Based on motor drive technology and advanced control theory, they combine mechanical design with fluid mechanics principles to adjust fluid flow, pressure, and other parameters by varying the relative position between the valve core and valve seat. Their development incorporates advances in electronics, automation, and other fields to adapt to the complex processes found in numerous industries, including chemical, petroleum, electric power, and pharmaceuticals. They provide reliable technical support for improving production efficiency, ensuring product quality, and ensuring 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 effect of 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 objectives, the present invention provides the following technical solutions: a stainless steel electric regulating valve, comprising: a valve body, a drive assembly, a valve core assembly and a connecting assembly, wherein a liquid inlet chamber, a liquid outlet chamber and a regulating chamber are provided inside the valve body; 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 includes a first valve core and a second valve core, a guide groove is provided 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 includes a connecting chamber arranged at the upper end of the regulating chamber, a pressure regulating cylinder is provided at the upper end of the connecting chamber, and a first piston cylinder and a second piston cylinder are provided inside the connecting chamber. 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, the guide grooves are multiple and evenly distributed at the bottom of the first valve core, a liquid inlet is provided at the bottom of the first valve core, an inner cavity is provided at the first valve core, the liquid inlet is connected to the inner cavity of the first valve core, a plurality of liquid outlets are provided on the outer wall of the first valve core, the inner cavity of the first valve core is connected to the regulating cavity through the liquid outlets, and the movement of the second valve core can control the liquid inlet and the inner cavity of the first valve core to be sealed and connected.

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

[0009] Preferably, the outer wall of the second piston rod is sleeved with a first 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 regulating chamber and extends into the interior of the first piston cylinder, the end of the first piston rod away from the first valve core is fixedly connected to the first piston, and the first piston is slidably connected to the inner wall of the first piston cylinder.

[0010] Preferably, the driving assembly includes a driving chamber fixedly connected to the upper end of the connecting chamber, one end of the pressure regulating cylinder is fixedly connected to the inner bottom surface of the driving chamber, the bottom of the pressure regulating cylinder is provided with a first vent hole, the bottom of the driving chamber is provided with a second vent hole, the bottom of the driving chamber is provided with a slide groove, the first vent hole and the second vent hole are connected through the slide groove, a slider is slidably connected in the slide groove, the upper end of the slider is fixedly connected to a sealing column, and the sealing column can move to seal the first vent hole, the pressure regulating cylinder is slidably connected to the first pressure plate, a second elastic member is provided in the pressure regulating cylinder, one end of the second elastic member is fixedly connected to the first pressure plate, and 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 provided 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.

[0011] Preferably, an air cylinder is fixedly connected to the bottom of the driving chamber, a through hole connected to the second piston cylinder is provided at the bottom of the air cylinder, a fourth air hole is provided at the bottom of the second piston cylinder, a third air hole is provided at the bottom of the first piston cylinder, the third air hole and the fourth air hole are connected through a soft air tube, a fifth air hole is provided at the bottom of the first piston cylinder, the fifth air hole and the second air hole are connected through a soft air tube, and the first piston cylinder and the second piston cylinder are both provided with through holes connected to the outside world.

[0012] Preferably, a buffer plate is slidably connected to the inside of the buffer cavity, and a first elastic member is provided 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 provided on the side wall of the valve body, and the air groove is connected to the bottom of the buffer cavity. An elastic seal is provided at the bottom connecting port of the regulating cavity, and the elastic seal is in contact with the outer wall of the first valve core. The end of the elastic seal away from the first valve core is connected to the air groove.

[0014] Preferably, the outer wall of the driving chamber is fixedly connected to a motor, the output end of the motor extends into the driving chamber, a coupling is provided inside the driving chamber, the coupling is connected to the output end of the motor, the inner bottom surface of the driving chamber is fixedly connected to a screw, the end of the screw away from the inner bottom surface of the driving chamber passes through the air cylinder and is connected to the coupling, the outer wall of the screw is sleeved with a second pressure plate, the second pressure plate is slidably connected to the inner wall of the air cylinder, the inner wall of the second pressure plate is meshed with the screw, and the top of the driving chamber is fixedly connected to a runner, and the runner is connected to the coupling.

[0015] The technical effects and advantages of the present invention are as follows:

[0016] 1. The present invention provides a first valve core and a second valve core. When the regulating valve is opened to a small extent, the flow rate is regulated by the first valve core. At this time, the flow rate change caused by the displacement of the valve core is small, thereby ensuring the stability of the flow rate and improving the control accuracy of the flow rate.

[0017] 2. The present invention provides a pressure regulating cylinder to correct the position errors of the first valve core and the second valve core of the regulating valve each time the regulating valve is fully opened, thereby reducing the cumulative error, so that the regulating valve can still effectively ensure the flow control accuracy during long-term use.

[0018] 3. The present invention diverts the medium at the valve core when the regulating valve is opened to a small extent, thereby preventing the flow velocity at the valve core of the regulating valve from being too fast and generating vortexes under small opening conditions, thereby affecting the flow stability and the service life of the regulating valve.

[0019] 4. The present invention buffers the water hammer effect when closing the regulating valve, and squeezes the seal to prevent the valve core from being damaged by the instantaneous increase in pressure on the valve core due to the water hammer, and avoids liquid leakage in the valve due to the instantaneous increase in pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2It is a cross-sectional view of the overall structure of the present invention in a closed state.

[0022] Figure 3 It is a cross-sectional view of the overall structure of the present invention in a fully opened state.

[0023] Figure 4 This is a cross-sectional view of the second valve core in the open state of the present invention.

[0024] Figure 5 For the present invention Figure 2 A magnified view of the structure at center A.

[0025] Figure 6 For the present invention Figure 3 Enlarged view of the structure at point B in the middle.

[0026] Figure 7 For the present invention Figure 2 Enlarged view of the structure at point C in the middle.

[0027] Figure 8 It is a cross-sectional view of the overall structure of the valve body of the present invention.

[0028] Figure 9 This is a schematic diagram of the overall structure of the first valve core of the present invention.

[0029] The accompanying drawings are marked as follows: 1. valve body; 11. liquid inlet chamber; 12. liquid outlet chamber; 13. regulating chamber; 14. buffer chamber; 141. buffer plate; 142. first elastic member; 2. drive assembly; 21. drive chamber; 22. air cylinder; 23. motor; 24. rotary wheel; 25. second pressure plate; 3. valve core assembly; 31. first valve core; 311. guide groove; 312. first piston rod; 313. first piston; 32. second valve core; 321. second piston rod; 322. second piston; 4. connecting assembly; 41. connecting chamber; 42. pressure regulating cylinder; 421. first air vent; 422. second air vent; 423. sealing column; 424. first pressure plate; 425. second elastic member; 43. first piston cylinder; 431. third air vent; 432. fifth air vent; 44. second piston cylinder; 441. fourth air vent. DETAILED DESCRIPTION

[0030] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Example 1

[0032] In actual use, it is found that 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, thereby affecting the control accuracy. This embodiment is specially invented to solve the above problem.

[0033] See also Figure 1 and Figure 4 As shown, the present invention provides a stainless steel electric regulating valve, comprising a valve body 1, a drive assembly 2, a valve core assembly 3 and a connecting assembly 4. The valve body 1 is provided with a liquid inlet cavity 11, a liquid outlet cavity 12 and a regulating cavity 13.

[0034] See also Figure 2 and Figure 8 As shown, the connecting assembly 4 includes a connecting cavity 41 arranged at the upper end of the regulating cavity 13, and a first piston cylinder 43 and a second piston cylinder 44 are arranged inside the connecting cavity 41. The first piston cylinder 43 and the second piston cylinder 44 are both provided with through holes connected to the outside.

[0035] See also Figure 2 and Figure 5 As shown, the valve core assembly 3 is arranged inside the regulating chamber 13. The movement of the valve core assembly 3 can control the sealing and communication between the liquid inlet chamber 11 and the regulating chamber 13. The valve core assembly 3 includes a first valve core 31 and a second valve core 32. The upper end of the second valve core 32 is fixedly connected to a second piston rod 321. The second piston rod 321 passes through the first valve core 31, the regulating chamber 13 and the first piston cylinder 43 and then extends into the second piston cylinder 44. The end of the second piston rod 321 away from the second valve core 32 is fixedly connected to the second piston 322. The second piston 322 is slidably connected to the inner wall of the second piston cylinder 44, and the outer wall of the second piston rod 321 is sleeved with the first piston rod 312. One end of the first piston rod 312 is fixedly connected to the top 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 extends into the interior of 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, and the first piston 313 is slidably connected to the inner wall of the first piston cylinder 43.

[0036] See also Figure 3 and Figure 6 As shown, the bottom of the driving chamber 21 is fixedly connected to the air cylinder 22, and the bottom of the air cylinder 22 is provided with a through hole connected to the second piston cylinder 44. Figure 7 As shown, a fourth vent hole 441 is opened at the bottom of the second piston cylinder 44, and a third vent hole 431 is opened at the bottom of the first piston cylinder 43. The third vent hole 431 is connected to the fourth vent hole 441 through a soft air tube.

[0037] See also Figure 2As shown, the outer wall of the drive chamber 21 is fixedly connected to the motor 23, and the output end of the motor 23 extends into the interior of the drive chamber 21. A coupling is provided inside the drive chamber 21, and the coupling is connected to the output end of the motor 23. The inner bottom surface of the drive chamber 21 is fixedly connected to a screw, and the end of the screw away from the inner bottom surface of the drive chamber 21 passes through the air cylinder 22 and is connected to the coupling. The outer wall of the screw is sleeved with a second pressure plate 25, and 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 engaged with the screw, and the top of the drive chamber 21 is fixedly connected to a runner 24, and the runner 24 is connected to the coupling, wherein the coupling and the screw are both existing technologies.

[0038] When in use, first start the motor 23, and the output shaft of the motor 23 drives the screw to rotate through the coupling. The rotation of the screw causes the second pressure plate 25 to slide downward inside the gas cylinder 22 and squeeze the gas inside the gas cylinder 22. The gas inside the gas cylinder 22 enters the second piston cylinder 44 through the through hole. The gas entering the second piston cylinder 44 causes the second piston 322 to drive the second piston rod 321 to move downward, thereby causing the second piston rod 321 to drive the second valve core 32 to slide downward. Since the fourth vent 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 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 regulating chamber 13 through the liquid inlet of the first valve core 31 and flow into the regulating chamber 13 The liquid outlet chamber 12, at this time the electric control valve is opened to a small extent, when the second piston 322 slides to the inner bottom surface of the second piston cylinder 44, the gas can enter the first piston cylinder 43 through the fourth vent hole 441, at this time the motor 23 continues to rotate, the second pressure plate 25 continues to slide downward, the gas enters the first piston cylinder 43 through the second piston cylinder 44, and the gas continuously enters the first piston cylinder 43 so that the first piston 313 drives the first piston rod 312 to move upward, thereby causing the first piston rod 312 to drive the first valve core 31 to move upward, thereby causing the electric control valve to gradually increase its opening degree. When the electric control valve is opened to a small extent, the flow cross-sectional area changes less due to the displacement of the second valve core 32, so as to prevent the problem that when the electric control valve is opened to a small extent, the slight displacement of the valve core may cause the flow rate to change too much and affect the control accuracy.

[0039] Example 2

[0040] In actual use, it was found that when the electric regulating valve is opened at a small degree, the pressure in the liquid inlet chamber 11 is relatively high, the unbalanced force on the valve core is relatively large, and vortices are easily formed at the bottom of the valve core, affecting the stability of the flow rate. Further improvements are made on the basis of the above embodiments.

[0041] See also Figure 2 and Figure 5As shown, a guide groove 311 is opened at the bottom of the first valve core 31 , and the second valve core 32 can divert the liquid in the liquid inlet chamber 11 and enter the regulating chamber 13 through the guide groove 311 at the bottom of the first valve core 31 .

[0042] See also Figure 9 As shown, the guide grooves 311 are multiple and evenly distributed at the bottom of the first valve core 31. The bottom of the first valve core 31 is provided with a liquid inlet. The first valve core 31 is provided with an inner cavity. Figure 2 and Figure 3 The liquid inlet is connected to the inner cavity of the first valve core 31, and the outer wall of the first valve core 31 is provided with multiple liquid outlets. Figure 4 As shown, the inner cavity of the first valve core 31 is connected to the regulating cavity 13 through the liquid outlet, and the movement of the second valve core 32 can control the liquid inlet and inner cavity of the first valve core 31 to be sealed and connected. Figure 5 As shown, the bottom of the second valve core 32 is a streamlined structure.

[0043] During use, when the electric regulating valve is opened to a small extent, the liquid enters the liquid inlet through the second valve core 32. Due to the streamlined structure of the second valve core 32, the liquid at the bottom of the second valve core 32 is diverted, and part of the liquid is diverted to the bottom of the first valve core 31. The liquid at the bottom of the first valve core 31 enters the liquid inlet through the guide groove 311, and then enters the regulating chamber 13 through the inner cavity of the first valve core 31. By diverting the liquid, when the regulating valve is opened to a small extent, the smoothness of the liquid entering the regulating chamber 13 is guaranteed, thereby preventing the problem of vortexes at the bottom of the first valve core 31 and the second valve core 32 from affecting the stability of the flow.

[0044] Example 3

[0045] In actual use, it was found that when the electric regulating valve was closed after use, the pressure on the valve core increased instantly due to the water hammer, causing a large impact on the valve core, which could easily cause damage to the valve core. At the same time, the impact could cause liquid to leak from the seal. Further improvements were made on the basis of the above embodiments.

[0046] See also Figure 2 and Figure 5 As shown, 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 opened inside the buffer chamber 14. When the pressure at the bottom of the first valve core 31 is too high, the liquid inside the liquid inlet chamber 11 can enter the buffer chamber 14 through the through hole for buffering.

[0047] See also Figure 4As shown, the buffer chamber 14 is slidably connected to a buffer plate 141, and a first elastic member 142 is provided 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 provided on the side wall of the valve body 1, and the air groove is connected to the bottom of the buffer chamber 14. An elastic seal is provided at the bottom connecting port of the regulating chamber 13, and the elastic seal is in contact with the outer wall of the first valve core 31. The end of the elastic seal away from the first valve core 31 is connected to the air groove, wherein the first elastic member 142 is a spring, which is used to connect the buffer chamber 14 with the liquid inlet chamber 11, and the through hole is located above the buffer plate 141.

[0048] On the basis of the above embodiment, during use, when the electric regulating valve is closed after use, the pressure on the first valve core 31 and the second valve core 32 will increase instantly due to the water hammer effect, and the liquid in the liquid inlet chamber 11 will impact the first valve core 31 and the second valve core 32. At this time, the liquid is diverted by the second valve core 32, so that the liquid impacts the inner wall of the liquid inlet chamber 11. Due to the effect of pressure, the liquid enters the buffer chamber 14 through the through hole. The liquid continuously enters the buffer chamber 14 due to the impact force, so that the buffer plate 141 slides inside the buffer chamber 14, and the first elastic member 142 is squeezed by the buffer plate 141 to buffer the water hammer effect on the electric regulating valve. At the same time as the buffer plate 141 slides, the gas in 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 closely with the first valve core 31, preventing the problem of leakage caused by the sudden increase in liquid pressure and seepage of the elastic seal.

[0049] Example 4

[0050] In actual use, it was found that during the long-term use of the electric control valve, errors may easily lead to insufficient control accuracy. Therefore, further improvements are made on the basis of the above embodiments.

[0051] See also Figure 3 and Figure 5 As shown, a pressure regulating cylinder 42 is provided at the upper end of the connecting cavity 41 . When the stainless steel electric regulating valve is fully opened, the first piston cylinder 43 and the second piston cylinder 44 can adjust the internal pressure through the pressure regulating cylinder 42 .

[0052] See also Figure 5As shown, the driving assembly 2 includes a driving chamber 21 fixedly connected to the upper end of the connecting 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 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 through the slide groove, a slider is slidably connected in the slide groove, a sealing column 423 is fixedly connected to the upper end of the slider, and the sealing column 423 moves to seal the first vent hole 421, and a first pressure plate 42 is slidably connected in the pressure regulating cylinder 42. 24. A second elastic member 425 is provided in the pressure regulating cylinder 42, one end of the second elastic member 425 is fixedly connected to the first pressure 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 provided 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. A fifth air vent 432 is provided at the bottom of the first piston cylinder 43, and the fifth air vent 432 is connected to the second air vent 422 through a soft air tube, wherein the second elastic member 425 is a spring, and the third elastic member is an airbag, which are all existing technologies and will not be described here.

[0053] On the basis of the above embodiment, when in use, after the second valve core 32 is fully opened, the second pressure plate 25 continues to move downward, and the internal gas of the gas cylinder 22 enters the first piston cylinder 43 through the fourth vent hole 441 and the third vent hole 431. The gas continuously enters the first piston cylinder 43, causing the first piston 313 to drive the first piston rod 312 to slide upward, and the first valve core 31 is driven to move upward by the first piston rod 312 sliding upward. When the second pressure plate 25 slides downward to the limit position, the second pressure plate 25 pushes the slider to squeeze the third elastic member. At the same time, the sealing column 423 no longer seals the first vent hole 421, and the pressure regulating cylinder 42 is connected to the first piston cylinder 43. When the second pressure plate 25 slides downward to the limit position, the second pressure plate 25 pushes the slider to squeeze the third elastic member. At the same time, the sealing column 423 no longer seals the first vent hole 421, and the pressure regulating cylinder 42 is connected to the first piston cylinder 43. When the pressure plate 25 moves to the limit position but the first valve core 31 does not move to the limit position, the second elastic member 425 inside the pressure regulating cylinder 42 relaxes and drives the first pressure 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, so that the gas inside the pressure regulating cylinder 42 enters the first piston cylinder 43 through the first vent hole 421, and adjusts the internal pressure of the first piston cylinder 43, the second piston cylinder 44 and the gas cylinder 22, so that each time the second pressure plate 25 moves to the limit position during use, the electric control valve is corrected for error, so as to prevent the electric control valve from having insufficient control accuracy due to errors during long-term use.

[0054] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection 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 cavity (11), a liquid outlet cavity (12) and a regulating cavity (13), and is 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 communication state between the liquid inlet chamber (11) and the regulating chamber (13) by movement, 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 thereof, the second valve core (32) being capable of diverting liquid from 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) provided at the upper end of the regulating chamber (13), a pressure regulating cylinder (42) provided at the upper end of the connecting chamber (41), a first piston cylinder (43) and a second piston cylinder (44) provided 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); 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, the liquid inside the liquid inlet chamber (11) can enter the buffer chamber (14) through the through hole for buffering. The guide grooves (311) are multiple and evenly distributed at the bottom of the first valve core (31). The bottom of the first valve core (31) is provided with a liquid inlet, and 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). The outer wall of the first valve core (31) is provided with multiple liquid outlets. The inner cavity of the first valve core (31) is connected to the regulating cavity (13) through 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.

2. The stainless steel electric regulating valve according to claim 1, 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) passes through 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). The 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).

3. The stainless steel electric regulating valve according to claim 2, 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 interior of 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), and the first piston (313) is slidably connected to the inner wall of the first piston cylinder (43).

4. The stainless steel electric regulating valve according to claim 3, characterized in that: The driving assembly (2) includes a driving chamber (21) fixedly connected to the upper end of the connecting 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 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 sliding 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 sliding groove, a slider is slidably connected in the sliding groove, and a sealing column (42) is fixedly connected to the upper end of the slider. 3), the sealing column (423) moves 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 provided 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 provided 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.

5. The stainless steel electric regulating valve according to claim 4, characterized in that: The bottom of the driving chamber (21) is fixedly connected to an air cylinder (22), and a through hole communicating with the second piston cylinder (44) is provided at the bottom of the air cylinder (22), a fourth air hole (441) is provided at the bottom of the second piston cylinder (44), and a third air hole (431) is provided at the bottom of the first piston cylinder (43), and the third air hole (431) and the fourth air hole (441) are connected via a soft air tube. A fifth air hole (432) is provided at the bottom of the first piston cylinder (43), and the fifth air hole (432) and the second air hole (422) are connected via a soft air tube. The first piston cylinder (43) and the second piston cylinder (44) are both provided with a through hole communicating with the outside world.

6. The stainless steel electric regulating valve according to claim 5, characterized in that: A buffer plate (141) is slidably connected to the interior of the buffer cavity (14), and 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).

7. The stainless steel electric regulating valve according to claim 6, characterized in that: An air groove is provided on the side wall of the valve body (1), and 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), and the elastic seal contacts the outer wall of the first valve core (31). An end of the elastic seal away from the first valve core (31) is connected to the air groove.

8. The stainless steel electric regulating valve according to claim 7, 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 interior of the drive chamber (21), a coupling is provided inside the drive chamber (21), the coupling is connected to the output end of the motor (23), the inner bottom surface of the drive chamber (21) is fixedly connected to a lead screw, the 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, the outer wall of the lead screw is sleeved with a second pressure plate (25), 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 engaged with the lead screw, the top of the drive chamber (21) is fixedly connected to a rotating wheel (24), and the rotating wheel (24) is connected to the coupling.

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