Integrated lvdt and high-guarded proportional control valve

Abstract

The application relates to the technical field of proportional speed regulating valves, and discloses an integrated LVDT and high-protection proportional speed regulating valve, which comprises a valve body and an integrated amplifier arranged on the valve body, the top of the valve body is fixedly connected with an LVDT displacement sensor, further comprises a throttling part arranged in the valve body and used for controlling flow, an anti-backflow part installed in the valve body and used for preventing backflow, and a pressure regulating part located in the valve body and used for balancing pressure, wherein the integrated amplifier controls the throttling part to run, so that liquid enters the valve body and then flows out through the anti-backflow part. The throttling part is arranged, so that the problem that the existing integrated LVDT and high-protection proportional speed regulating valve is inconvenient to regulate and control the connected channel during use, the channel is difficult to be rapidly cut off or connected, the flow is difficult to be self-adaptively regulated, the flow fluctuation is too large, and the overloading condition is prone to occur, thereby reducing the service life of the speed regulating valve is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of proportional speed regulating valves, and particularly relates to an integrated LVDT and high-protection proportional speed regulating valve. BACKGROUND

[0002] In the field of industrial automation, the speed control precision and reliability of a hydraulic system on an actuator are increasingly improved, a traditional proportional speed regulating valve usually adopts a potentiometer as a position feedback element, and the potentiometer has defects such as easy wear and weak anti-interference capability, and especially in harsh working conditions such as high dust, humidity and vibration, the reliability is significantly reduced, an LVDT is a non-contact displacement sensor, and has advantages such as high precision, long service life and strong anti-interference capability, but the integration of the LVDT and the proportional speed regulating valve needs to solve problems such as compactness, signal compatibility and protection performance, and meanwhile, the high-protection proportional speed regulating valve needs to meet protection levels such as IP67 and IP68 to adapt to severe environments such as engineering machinery, metallurgy and ocean engineering, in the prior art, the integrated design of the sensor and the valve body often leads to a complex sealing structure, high maintenance cost and signal transmission vulnerable to electromagnetic interference, therefore, research and development of a proportional speed regulating valve organically combining high-precision feedback of the LVDT and high-protection structure need to break through key technical bottlenecks such as built-in layout of the sensor, dynamic sealing technology and anti-interference signal processing, so as to improve the control precision and environmental adaptability of the hydraulic system and meet the needs of high-end equipment for reliability and intelligentization.

[0003] However, the existing integrated LVDT and high-protection proportional speed regulating valve is inconvenient to regulate and control the communicated channel during use, so that the channel is difficult to be rapidly cut off or communicated, the flow is difficult to be self-adaptively regulated, the flow fluctuation is too large, an overload condition is prone to occur, and therefore the service life of the speed regulating valve is reduced. SUMMARY

[0004] The application aims to provide an integrated LVDT and high-protection proportional speed regulating valve, which solves the problem that the existing integrated LVDT and high-protection proportional speed regulating valve is inconvenient to regulate and control the communicated channel during use, so that the channel is difficult to be rapidly cut off or communicated, the flow is difficult to be self-adaptively regulated, the flow fluctuation is too large, an overload condition is prone to occur, and therefore the service life of the speed regulating valve is reduced.

[0005] To solve the above technical problems, the application is implemented by the following technical scheme:

[0006] This invention relates to an integrated LVDT and high-protection proportional speed control valve, comprising a valve body and an integrated amplifier mounted on the valve body. An LVDT displacement sensor is fixedly connected to the top of the valve body. The valve body also includes: a throttling section disposed within the valve body for controlling flow; an anti-backflow section installed within the valve body for preventing backflow; and a pressure regulating section located within the valve body for balancing pressure. The integrated amplifier controls the operation of the throttling section, allowing liquid to enter the valve body and then flow out through the anti-backflow section, while the pressure regulating section balances the liquid pressure within the valve body.

[0007] Furthermore, the throttling section includes a sliding assembly located within the valve body; and a valve assembly located at the bottom of the sliding assembly; wherein, the control signal within the integrated amplifier is transmitted to the sliding assembly via an LVDT displacement sensor, and then controls the operation of the valve assembly, thereby controlling the flow rate.

[0008] Furthermore, the anti-backflow section includes a connecting component disposed within the valve body to ensure the flow of liquid; and a blocking component installed within the valve body; wherein the blocking component is used to ensure the stability of the liquid flow direction within the connecting component and to prevent liquid backflow.

[0009] Furthermore, the pressure regulating part includes a pressure equalizing groove 1 formed in the valve body, a pressure equalizing groove 2 formed in the valve body, a channel 5 formed in the valve body, the channel 5 being connected to the pressure equalizing groove 2, a slide rod 2 being slidably connected to the inner wall of the pressure equalizing groove 1, the rear side of the slide rod 2 extending into the anti-backflow part, a reset member being provided on the front side of the slide rod 2, and a channel 6 formed in the valve body, the left side of the channel 6 being connected to the pressure equalizing groove 1; wherein, when the front side of the slide rod 2 in the pressure equalizing groove 1 is filled with liquid, it will push the slide rod 2 to slide backward.

[0010] Furthermore, the sliding assembly includes an electromagnet fixedly connected to the inner wall of the valve body, a limiting tube fixedly connected to the inner wall of the valve body, the limiting tube passing through the electromagnet, and a sliding rod slidably connected to the inner wall of the limiting tube, the sliding rod passing through the limiting tube, and the top of the sliding rod extending into the LVDT displacement sensor; wherein, through the detection of the LVDT displacement sensor, the signal is transmitted to the integrated amplifier, and then the integrated amplifier controls the electromagnet to drive the sliding rod slid through the limiting tube.

[0011] Furthermore, the valve assembly includes a channel 1 opened at the bottom of the valve body, a connecting block 1 slidably connected to the inner wall of the channel 1, the bottom of the slide rod 1 being fixedly connected to the connecting block 1, a sealing element being provided inside the connecting block 1, and the channel 1 communicating with the channel 6; wherein, when the slide rod 1 slides, it will drive the connecting block 1 to slide within the channel 1, and the flow rate of the liquid will be controlled by the sealing element.

[0012] Furthermore, the connecting component includes a second channel within the valve body, which is connected to a first channel. A third channel is also provided within the valve body, connecting the second and third channels. The third channel is connected to a fifth channel. A fourth channel is provided at the bottom of the valve body, connecting the fourth and third channels. Liquid in the first channel flows through the connecting component and into the second pressure-balancing groove via the fifth channel. When the second pressure-balancing groove is filled with liquid, the pressure in the first and second pressure-balancing grooves remains balanced. Then, under the action of resetting, the liquid in the first pressure-balancing groove is forced into the first channel, thus circulating to ensure that the liquid pressure tends to balance.

[0013] Furthermore, the blocking component includes a connecting block two fixedly connected to the inner wall of the valve body, and a slider is slidably connected to the inner wall of the connecting block two. An elastic element is provided on the slider. The liquid flows from channel one to channel two, and under the action of the blocking component, flows to channel three, and finally exits from channel four. The blocking component prevents the liquid from flowing back.

[0014] Furthermore, the reset component includes a limiting block fixedly connected to the inner wall of the valve body, a connecting block three fixedly connected to the inner wall of the pressure leveling groove one, a spring three fixedly connected to the inner wall of the connecting block three, and the rear side of the spring three fixedly connected to the slide rod two; wherein, when the slide rod two moves to the limiting block, it will stop moving under the action of the limiting block. When the pressure leveling groove two is filled with liquid, so that the pressure in the pressure leveling groove two and the pressure leveling groove one are balanced, the slide rod two will reset under the action of the spring three and squeeze out the liquid in the pressure leveling groove one. After the slide rod two resets, it will block the channel five. At this time, the pressure is unbalanced, and the liquid will re-enter the pressure leveling groove one through the channel six.

[0015] Furthermore, the sealing element includes a valve one slidably connected to the inner wall of the connecting block one, a spring one fixedly connected to the top of the valve one, and the top of the spring one fixedly connected to the connecting block one; the elastic element includes a valve two fixedly connected to the front side of the slider, a spring two sleeved on the outer wall of the slider, the front side of the spring two fixedly connected to the valve two, and the rear side of the valve two fixedly connected to the slider; wherein, when the connecting block one slides down, the valve one will first contact the channel one, and then the valve one will squeeze the spring one to generate elastic force, thereby ensuring a seal; when liquid flows from the channel one into the channel two, it will impact the valve two, causing it to drive the slider into the connecting block two, thereby generating elastic force in the spring two, ensuring that the valve two resets after the liquid stops entering, blocking the connection between the channel one and the channel two.

[0016] The present invention has the following beneficial effects:

[0017] (1) By setting a throttling section, when liquid needs to enter the valve body, the integrated amplifier can be activated to control the electromagnet to drive the slide rod one to slide in the limiting tube. When the slide rod one slides to the preset position, under the action of the LVDT displacement sensor, a signal is sent to the integrated amplifier to control the slide rod one to stop sliding. When the slide rod one slides, it will drive the valve one to move upward through the connecting block one, so that the channel one, channel six, and channel two are interconnected. When the slide rod one slides downward, the valve one will first contact the channel one, and then the valve one will squeeze the spring one, causing it to undergo elastic deformation and generate elastic force. Under the action of the elastic force and the valve one, the connection between the channel one and the outside world will be blocked, thereby preventing liquid from entering the valve body. The liquid enters through the channel, and the sliding of the sliding rod controls the compression of the connecting block, which in turn controls the degree of compression of the spring. When the liquid enters the valve body from the bottom of the channel, it impacts the valve and causes it to slide into the valve assembly. The degree of compression of the spring is proportional to the amount of liquid flowing into the valve body, thereby controlling the flow rate. This system enables liquid flow control. It utilizes an LVDT displacement sensor and an integrated amplifier to adjust the position of the sliding rod, combined with an electromagnet drive to achieve rapid response. It can quickly connect or disconnect the channel, adaptively adjust the flow rate, reduce fluctuations, and provide overload protection. The integrated design of each component results in a compact structure, reduces external interference, and achieves dynamic, stable, and reliable bidirectional flow control. It is suitable for automation scenarios and effectively improves the overall system performance and service life.

[0018] (2) By setting up an anti-backflow part, when liquid enters the valve body from channel one, it will flow into channel two and impact valve two, causing the slider to slide into connecting block two and causing spring two to generate elastic force. When valve two is away from channel two, channel two is connected to channel three, and liquid will flow into channel three from channel two. When the liquid impact force in channel two is less than the elastic force of spring two, spring two will release the elastic force to gradually reset valve two. When the liquid in channel two is less than a certain level, valve two will block the connection between channel two and channel three, so that liquid can only flow into channel three from channel two and cannot flow in the opposite direction. Liquid entering channel three will be discharged from channel four. The dynamic balance between liquid impact force and spring elastic force can be used to control the opening and closing of valve two, ensuring that liquid can only flow from channel two to channel three, effectively blocking reverse flow and ensuring the stable operation of the device.

[0019] (3) By setting up a pressure regulating part, when liquid enters channel one, it will rush into the pressure leveling tank one from channel six and squeeze the slide rod two, causing it to move backward. At this time, spring three will undergo elastic deformation and generate elastic force. When slide rod two slides, it will open the connection between channel five and channel three. At this time, the liquid in channel three will flow into the pressure leveling tank two from channel five, thereby keeping the pressure in pressure leveling tank two and pressure leveling tank one balanced. When the pressure is balanced, the elastic force of spring three loses its balance and will drive slide rod two to slide towards connecting block three, thereby squeezing out the liquid in pressure leveling tank one. When slide rod two slides towards connecting block three, it will close channel three and channel five. At this time, the pressure balance is broken, thus completing the cycle. Under the cycle, the pressure tends to be balanced. It can automatically adjust the pressure of the liquid during the operation of the device to avoid the situation of pressure instability. The function is realized through the linkage of mechanical components, without the need for complex electrical control components, simplifying the system structure and improving the anti-interference ability.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic cross-sectional view of the structure on the right side of the present invention;

[0023] Figure 2 This is a partial cross-sectional view of the connecting component of the present invention;

[0024] Figure 3 This is a partial cross-sectional view of the anti-backflow section of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of the pressure regulating part of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified structural diagram of A in the middle;

[0027] Figure 6 This is a partial cross-sectional view of the blocking component of the present invention;

[0028] Figure 7 This is a schematic diagram of the overall structure of the spring three of the present invention;

[0029] Figure 8 This is a partial cross-sectional view of the sliding component of the present invention;

[0030] Figure 9 This is a partial cross-sectional view of the valve assembly of the present invention.

[0031] The following is a list of components represented by each label in the attached diagram:

[0032] In the diagram: 101, Valve body; 102, Integrated amplifier; 103, LVDT displacement sensor; 2, Throttling section; 21, Sliding assembly; 211, Electromagnet; 212, Limiting tube; 213, Slide rod one; 22, Valve assembly; 221, Channel one; 222, Connecting block one; 223, Valve one; 224, Spring one; 3, Anti-backflow section; 31, Connecting assembly; 311, Channel two; 312, Channel three; 313, Channel four; 32, Blocking assembly; 321, Connecting block two; 322, Slider; 323, Valve two; 324, Spring two; 4, Pressure regulating section; 401, Pressure leveling groove one; 402, Pressure leveling groove two; 403, Channel five; 404, Slide rod two; 405, Limiting block; 406, Connecting block three; 407, Spring three; 408, Channel six. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-9 As shown, the present invention is an integrated LVDT and high-protection proportional speed control valve, including a valve body 101 and an integrated amplifier 102 disposed on the valve body 101. An LVDT displacement sensor 103 is fixedly connected to the top of the valve body 101. The valve body 101 also includes: a throttling section 2 disposed inside the valve body 101 for controlling flow; an anti-backflow section 3 disposed inside the valve body 101 for preventing backflow; and a pressure regulating section 4 located inside the valve body 101 for balancing pressure. The integrated amplifier 102 controls the operation of the throttling section 2, allowing liquid to enter the valve body 101 and then flow out through the anti-backflow section 3, while the pressure regulating section 4 is used to balance the liquid pressure inside the valve body 101.

[0035] The throttling section 2 includes a sliding assembly 21 located inside the valve body 101; and a valve assembly 22 located at the bottom of the sliding assembly 21. A control signal from the integrated amplifier 102 is transmitted to the sliding assembly 21 via an LVDT displacement sensor 103, thereby controlling the operation of the valve assembly 22 and controlling the flow rate. The sliding assembly 21 includes an electromagnet 211 fixedly connected to the inner wall of the valve body 101. A limit tube 212 is fixedly connected to the inner wall of the valve body 101, passing through the electromagnet 211. A sliding rod 213 is slidably connected to the inner wall of the limit tube 212, passing through the limit tube 212. The top of slide rod 213 extends into LVDT displacement sensor 103; the LVDT displacement sensor 103 detects and transmits the signal to integrated amplifier 102, which then controls electromagnet 211 to slide slide rod 213 via limit tube 212. Valve assembly 22 includes channel 221 at the bottom of valve body 101, with connecting block 222 slidably connected to the inner wall of channel 221. The bottom of slide rod 213 is fixedly connected to connecting block 222, and a seal is provided inside connecting block 222. Channel 221 communicates with channel 408; when slide rod 213 slides, it will... The connecting block 222 slides within channel 221, controlling the liquid flow through a seal. The seal includes a valve 223 slidably connected to the inner wall of the connecting block 222. A spring 224 is fixedly connected to the top of the valve 223, and the top of the spring 224 is also fixedly connected to the connecting block 222. When the connecting block 222 slides down, the valve 223 first contacts the channel 221, then compresses the spring 224, generating elasticity to ensure a seal. When liquid flows from channel 221 into channel 211, it impacts the valve 223, causing the slider 322 to slide into the connecting block 211. Within 21, the spring 2 324 generates elastic force, ensuring that valve 2 323 resets after the liquid stops entering, blocking the connection between channel 1 221 and channel 2 311. By setting the throttling part 2, liquid flow control can be achieved. The position of the slide bar is adjusted by using the LVDT displacement sensor 103 and the integrated amplifier 102, and the electromagnet 211 drives the rapid response, which can quickly connect or disconnect the channel, adaptively adjust the flow, reduce fluctuations and provide overload protection. The integrated design of each component is compact, reduces external interference, and achieves dynamic, stable and reliable bidirectional flow control, which is suitable for automation scenarios and effectively improves the overall performance and service life of the system.

[0036] The anti-backflow section 3 includes a connecting component 31, which is disposed within the valve body 101 to ensure liquid flow; and a blocking component 32, which is installed within the valve body 101. The blocking component 32 ensures the stability of the liquid flow direction within the connecting component 31 and prevents liquid backflow. The connecting component 31 includes a second channel 311 formed within the valve body 101, which communicates with a first channel 221. A third channel 312 is also formed within the valve body 101, which communicates with the first channel 221. Channel 312 is connected to channel 5 403. Channel 4 313 is provided at the bottom of valve body 101 and is connected to channel 312. Liquid in channel 1 221 flows through the connecting component 31 and into pressure leveling tank 2 402 through channel 5 403. When pressure leveling tank 2 402 is filled with liquid, the pressure in pressure leveling tank 1 401 and pressure leveling tank 2 402 is balanced. Then, under the action of reset, the liquid in pressure leveling tank 1 401 is squeezed out. The liquid flows into channel 221 and circulates in this manner to ensure that the liquid pressure tends to be balanced. The blocking component 32 includes a connecting block 321 fixedly connected to the inner wall of the valve body 101. A slider 322 is slidably connected to the inner wall of the connecting block 321, and an elastic element is provided on the slider 322. The liquid flows from channel 221 to channel 211, and under the action of the blocking component 32, flows to channel 312, and finally exits from channel 413. The blocking component 32 prevents the liquid from flowing back. The elastic element... The device includes a valve 323 fixedly connected to the front of the slider 322. A spring 324 is fitted on the outer wall of the slider 322. The front of the spring 324 is fixedly connected to the valve 323, and the rear of the valve 323 is fixedly connected to the slider 322. By setting the anti-backflow part 3, the opening and closing of the valve 323 can be controlled by the dynamic balance between the liquid impact force and the spring force, ensuring that the liquid can only flow from the channel 311 to the channel 312, effectively blocking the reverse flow and ensuring the stable operation of the device.

[0037] The pressure regulating unit 4 includes a pressure leveling groove 401 formed inside the valve body 101, a pressure leveling groove 402 formed inside the valve body 101, and a channel 403 formed inside the valve body 101, which is connected to the pressure leveling groove 402. A slide rod 404 is slidably connected to the inner wall of the pressure leveling groove 401. The rear side of the slide rod 404 extends into the anti-backflow unit 3. A reset member is provided on the front side of the slide rod 404. A channel 408 is formed inside the valve body 101, and the left side of the channel 408 is connected to the pressure leveling groove 401. When the front side of the slide rod 404 in the pressure leveling groove 401 is filled with liquid, it will push the slide rod 404 to slide backward. The reset member includes a limiting block 405 fixedly connected to the inner wall of the valve body 101. A connecting block 406 is fixedly connected to the inner wall of the pressure leveling groove 401, and a spring 407 is fixedly connected to the inner wall of the connecting block 406. The rear side of spring 3 407 is fixedly connected to slide rod 2 404. When slide rod 2 404 moves to the limit block 405, it will stop moving under the action of the limit block 405. When the pressure leveling groove 2 402 is filled with liquid and the pressure leveling groove 2 402 and pressure leveling groove 1 401 are balanced, slide rod 2 404 will reset under the action of spring 3 407 and squeeze out the liquid in pressure leveling groove 1 401. After slide rod 2 404 resets, it will block channel 5 403. At this time, the pressure is unbalanced, and the liquid will re-enter pressure leveling groove 1 401 through channel 6 408. By setting pressure regulating part 4, the pressure of the liquid can be automatically adjusted during the operation of the device to avoid pressure instability. The function is realized through the linkage of mechanical parts, without the need for complex electrical control components, simplifying the system structure and improving anti-interference ability.

[0038] In use, when liquid needs to enter the valve body 101, the integrated amplifier 102 can be activated to control the electromagnet 211 to drive the slide rod 213 to slide within the limit tube 212. When the slide rod 213 slides to the preset position, the LVDT displacement sensor 103 sends a signal to the integrated amplifier 102, causing it to stop the slide rod 213 from sliding. When the slide rod 213 slides, it drives the valve 223 to move upward through the connecting block 222, thereby connecting the channel 221 with the channel 408 and the channel 311. When the slide rod 213 slides downward, the valve 223 first contacts the channel 221, and then the valve 223 compresses the spring 224. This causes the liquid to undergo elastic deformation and generate elastic force. Under the action of the elastic force and valve 223, the connection between channel 221 and the outside is blocked, thus preventing the liquid from entering. The sliding rod 213 controls the sliding of connecting block 222, which in turn controls the compression of spring 224. When liquid enters valve body 101 from the bottom of channel 221, it impacts valve 223, causing it to slide into valve assembly 22. The compression of spring 224 is proportional to the amount of liquid flowing into valve body 101, thereby controlling the flow rate. When liquid enters valve body 101 from channel 221, it flows into channel 211 and impacts valve 223, causing slider 322 to slide into connecting block 221 and causing spring 224 to compress. When valve 2 323 moves away from channel 2 311, channel 2 311 connects with channel 3 312, and liquid flows from channel 2 311 into channel 3 312. When the impact force of the liquid in channel 2 311 is less than the elastic force of spring 2 324, spring 2 324 releases its elastic force, causing valve 2 323 to gradually return to its original position. When the liquid in channel 2 311 falls below a certain level, valve 2 323 blocks the connection between channel 2 311 and channel 3 312, thus allowing liquid to flow only from channel 2 311 into channel 3 312 and preventing reverse flow. Liquid entering channel 3 312 will be discharged from channel 4 313. When liquid enters channel 1 221, it will rush into the pressure groove 1 401 from channel 6 408 and squeeze the slide bar. When slide bar 404 moves backward, spring 3 407 undergoes elastic deformation and generates elastic force. As slide bar 404 slides, it opens the connection between channel 5 403 and channel 3 312. At this time, the liquid in channel 3 312 flows from channel 5 403 into pressure leveling groove 402, thus maintaining the pressure balance between pressure leveling groove 402 and pressure leveling groove 1 401. When the pressure is balanced, the elastic force of spring 3 407 loses its balance and drives slide bar 404 to slide towards connecting block 3 406, thereby squeezing out the liquid in pressure leveling groove 1 401. When slide bar 404 slides towards connecting block 3 406, it closes channel 3 312 and channel 5 403. At this time, the pressure balance is broken, thus completing the cycle. Under the cycle, the pressure tends to be balanced.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An integrated LVDT and high-protection proportional speed control valve, comprising a valve body (101) and an integrated amplifier (102) disposed on the valve body (101), wherein an LVDT displacement sensor (103) is fixedly connected to the top of the valve body (101), characterized in that, Also includes: Throttling section (2), which is disposed in valve body (101) for controlling flow; Backflow prevention section (3), said backflow prevention section (3) is installed inside valve body (101) for preventing backflow; and Pressure regulating part (4), which is located inside valve body (101) and is used to balance pressure; Among them, the integrated amplifier (102) controls the operation of the throttling section (2) so that the liquid enters the valve body (101) and then flows out through the anti-backflow section (3), while the pressure regulating section (4) is used to balance the liquid pressure in the valve body (101); The throttling section (2) includes a sliding assembly (21) located within the valve body (101); and Valve assembly (22), which is located at the bottom of sliding assembly (21); The control signal in the integrated amplifier (102) is transmitted to the sliding assembly (21) through the LVDT displacement sensor (103), and then controls the operation of the valve assembly (22) to control the flow rate. The backflow prevention section (3) includes a communication component (31), which is disposed within the valve body (101) to ensure the flow of liquid; and A blocking assembly (32) is installed inside the valve body (101); Among them, the blocking component (32) is used to ensure the stability of the liquid flow direction in the connecting component (31) and prevent liquid backflow; The pressure regulating part (4) includes a pressure leveling groove 1 (401) opened in the valve body (101), a pressure leveling groove 2 (402) opened in the valve body (101), a channel 5 (403) opened in the valve body (101), the channel 5 (403) being connected to the pressure leveling groove 2 (402), a slide rod 2 (404) being slidably connected to the inner wall of the pressure leveling groove 1 (401), the rear side of the slide rod 2 (404) extending into the anti-backflow part (3), a reset member being provided on the front side of the slide rod 2 (404), a channel 6 (408) opened in the valve body (101), the left side of the channel 6 (408) being connected to the pressure leveling groove 1 (401); When the front side of the slide bar 2 (404) in the pressure tank 1 (401) is filled with liquid, it will push the slide bar 2 (404) to slide backward.

2. The integrated LVDT and high-protection proportional speed control valve according to claim 1, characterized in that, The sliding assembly (21) includes an electromagnet (211) fixedly connected to the inner wall of the valve body (101), a limiting tube (212) fixedly connected to the inner wall of the valve body (101), the limiting tube (212) passing through the electromagnet (211), a sliding rod (213) slidably connected to the inner wall of the limiting tube (212), the sliding rod (213) passing through the limiting tube (212), and the top of the sliding rod (213) extending into the LVDT displacement sensor (103); The signal is transmitted to the integrated amplifier (102) by the detection of the LVDT displacement sensor (103), and then the integrated amplifier (102) controls the electromagnet (211) to drive the slide bar (213) to slide through the limit tube (212).

3. The integrated LVDT and high-protection proportional speed control valve according to claim 2, characterized in that, The valve assembly (22) includes a channel (221) opened at the bottom of the valve body (101), a connecting block (222) is slidably connected to the inner wall of the channel (221), the bottom of the slide rod (213) is fixedly connected to the connecting block (222), a sealing element is provided in the connecting block (222), and the channel (221) is connected to the channel (408); When the slide bar (213) slides, it will drive the connecting block (222) to slide in the channel (221) and control the flow rate of the liquid through the seal.

4. The integrated LVDT and high-protection proportional speed control valve according to claim 3, characterized in that, The connecting component (31) includes a second channel (311) opened in the valve body (101), the second channel (311) being connected to the first channel (221), a third channel (312) opened in the valve body (101), the second channel (311) being connected to the third channel (312), the third channel (312) being connected to the fifth channel (403), and a fourth channel (313) opened at the bottom of the valve body (101), the fourth channel (313) being connected to the third channel (312); The liquid in channel one (221) flows through the connecting component (31) and flows into the pressure leveling tank two (402) through channel five (403). When the pressure leveling tank two (402) is filled with liquid, the pressure in pressure leveling tank one (401) and pressure leveling tank two (402) is balanced. Then, under the action of resetting, the liquid in pressure leveling tank one (401) is squeezed into channel one (221). This cycle is repeated to ensure that the liquid pressure tends to be balanced.

5. The integrated LVDT and high-protection proportional speed control valve according to claim 4, characterized in that, The blocking component (32) includes a connecting block two (321) fixedly connected to the inner wall of the valve body (101), and a slider (322) is slidably connected to the inner wall of the connecting block two (321), and an elastic element is provided on the slider (322); The liquid flows from channel one (221) to channel two (311), and then flows to channel three (312) under the action of the blocking component (32), and finally exits from channel four (313). The blocking component (32) prevents the liquid from flowing back.

6. The integrated LVDT and high-protection proportional speed control valve according to claim 5, characterized in that, The reset component includes a limiting block (405) fixedly connected to the inner wall of the valve body (101), a connecting block three (406) fixedly connected to the inner wall of the flat pressure groove one (401), a spring three (407) fixedly connected to the inner wall of the connecting block three (406), and the rear side of the spring three (407) fixedly connected to the slide rod two (404). When slide bar 2 (404) moves to the limit block (405), it will stop moving under the action of the limit block (405). When the pressure in pressure trough 2 (402) is filled with liquid and the pressure in pressure trough 2 (402) is balanced with that in pressure trough 1 (401), slide bar 2 (404) will reset under the action of spring 3 (407) and squeeze out the liquid in pressure trough 1 (401). After slide bar 2 (404) resets, slide bar 2 (404) will block channel 5 (403). At this time, the pressure is unbalanced and the liquid will re-enter pressure trough 1 (401) through channel 6 (408).

7. The integrated LVDT and high-protection proportional speed control valve according to claim 6, characterized in that, The sealing element includes a valve (223) that is slidably connected to the inner wall of the connecting block (222), and a spring (224) is fixedly connected to the top of the valve (223), and the top of the spring (224) is fixedly connected to the connecting block (222). The elastic element includes a valve two (323) fixedly connected to the front side of the slider (322), and a spring two (324) is sleeved on the outer wall of the slider (322). The front side of the spring two (324) is fixedly connected to the valve two (323), and the rear side of the valve two (323) is fixedly connected to the slider (322). When the connecting block 1 (222) slides down, it will cause the valve 1 (223) to contact the channel 1 (221) first, and then the valve 1 (223) will squeeze the spring 1 (224) to generate elastic force, thereby ensuring a seal. When the liquid flows from the channel 1 (221) into the channel 2 (311), it will impact the valve 2 (323), causing the slider (322) to slide into the connecting block 2 (321), thereby causing the spring 2 (324) to generate elastic force, ensuring that the valve 2 (323) will reset after the liquid stops entering, blocking the connection between the channel 1 (221) and the channel 2 (311).

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