Integrated LVDT (Linear Variable Differential Transformer) and high-protection type proportional velocity regulating valve

Abstract

The invention relates to the technical field of proportional velocity control valves, and discloses an integrated LVDT (Linear Variable Differential Transformer) and high protection type proportional velocity control 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, the integrated LVDT and high protection type proportional velocity control valve further comprises a throttling part arranged in the valve body and used for controlling flow; the anti-backflow part is mounted in the valve body and is used for preventing backflow; the pressure regulating part is positioned in the valve body and is used for balancing pressure; wherein the integrated amplifier controls the throttling part to operate, so that liquid enters the valve body and then flows out through the anti-backflow part. By arranging the throttling part, the problems that in the using process of an existing integrated LVDT and high-protection type proportional speed regulating valve, a communicated channel is inconvenient to regulate and control, so that the channel is difficult to cut off or communicate quickly, the flow is difficult to adjust in a self-adaptive mode, the flow fluctuation is too large, overload is likely to occur, and the service life of the valve is prolonged are solved. Therefore, the service life of the speed regulating valve is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of proportional speed regulating valves, in particular to an integrated LVDT and high-protection proportional speed regulating valve. Background Art

[0002] In the field of industrial automation, hydraulic systems are increasingly demanding higher speed control accuracy and reliability for actuators. Traditional proportional speed control valves often use potentiometers as position feedback elements, which suffer from drawbacks such as wear and poor anti-interference capabilities. This reliability is particularly degraded in harsh operating conditions, such as high dust, humidity, and vibration. LVDTs, as non-contact displacement sensors, offer advantages such as high precision, long life, and strong anti-interference capabilities. However, their integration into proportional speed control valves presents challenges such as compactness, signal compatibility, and protection. Furthermore, high-protection proportional speed control valves must meet IP67 / IP68 protection levels to withstand harsh environments such as construction machinery, metallurgy, and marine engineering. In existing technologies, the integrated design of sensors and valve bodies often results in complex sealing structures, high maintenance costs, and signal transmission is susceptible to electromagnetic interference. Therefore, developing a proportional speed control valve that organically combines high-precision LVDT feedback with a high-protection structure requires overcoming key technical bottlenecks such as sensor internal layout, dynamic sealing technology, and anti-interference signal processing to improve the control accuracy and environmental adaptability of hydraulic systems and meet the reliability and intelligence requirements of high-end equipment.

[0003] However, the existing integrated LVDT and high-protection proportional speed control valves are not convenient for regulating the connected channels during use, which makes it difficult to quickly cut off or connect the channels and to adaptively adjust the flow rate, resulting in excessive flow fluctuations and prone to overload, thereby reducing the service life of the speed control valve. Summary of the Invention

[0004] The object of the present invention is to provide an integrated LVDT and high-protection proportional speed control valve. By setting a throttling part, the problem that the existing integrated LVDT and high-protection proportional speed control valve is inconvenient to regulate the connected channels during use, resulting in difficulty in quickly cutting off or connecting the channels, difficulty in adaptively adjusting the flow, resulting in excessive flow fluctuations, and easy overload, thereby reducing the service life of the speed control valve is solved.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is an integrated LVDT and high-protection proportional speed control valve, comprising a valve body and an integrated amplifier arranged on the valve body, wherein the top of the valve body is fixedly connected to an LVDT displacement sensor, and further comprising: a throttling portion, which is arranged in the valve body and is used to control the flow; an anti-backflow portion, which is installed in the valve body and is used to prevent backflow; and a pressure regulating portion, which is located in the valve body and is used to balance the pressure; wherein the integrated amplifier controls the operation of the throttling portion, allowing liquid to enter the valve body and then flow out through the anti-backflow portion, and the pressure regulating portion is used to balance the liquid pressure in the valve body.

[0006] Furthermore, the throttling part includes a sliding assembly, which is located in the valve body; and a valve assembly, which is located at the bottom of the sliding assembly; wherein the control signal in the integrated amplifier is transmitted to the sliding assembly through the LVDT displacement sensor, and then controls the operation of the valve assembly, thereby controlling the flow rate.

[0007] Furthermore, the anti-backflow part includes a connecting component, which is arranged in the valve body to ensure the circulation of liquid; and a blocking component, which is installed in the valve body; wherein the blocking component is used to ensure the stability of the liquid flow direction in the connecting component to prevent liquid backflow.

[0008] Furthermore, the pressure regulating part includes a pressure-smoothing groove 1 provided in the valve body, a pressure-smoothing groove 2 provided in the valve body, a channel 5 provided in the valve body, the channel 5 being communicated with the pressure-smoothing groove 2, the inner wall of the pressure-smoothing groove 1 being slidably connected with a slide rod 2, the rear side of the slide rod 2 extending into the anti-backflow part, a reset part being provided on the front side of the slide rod 2, a channel 6 provided in the valve body, the left side of the channel 6 being communicated with the pressure-smoothing groove 1; wherein, when the front side of the slide rod 2 in the pressure-smoothing groove 1 is filled with liquid, the slide rod 2 will be pushed to slide backward.

[0009] Furthermore, the sliding assembly includes an electromagnet fixedly connected to the inner wall of the valve body, the inner wall of the valve body is fixedly connected to a limit tube, the limit tube passes through the electromagnet, the inner wall of the limit tube is slidably connected to a slide rod 1, the slide rod 1 passes through the limit tube, and the top of the slide rod 1 extends 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 slide rod 1 to slide through the limit tube.

[0010] Furthermore, the valve assembly includes a channel 1 opened at the bottom of the valve body, the inner wall of the channel 1 is slidably connected to a connecting block 1, the bottom of the sliding rod 1 is fixedly connected to the connecting block 1, a sealing member is provided in the connecting block 1, and the channel 1 is connected to the channel 6; wherein, when the sliding rod 1 slides, it will drive the connecting block 1 to slide in the channel 1 and control the flow of the liquid through the sealing member.

[0011] Furthermore, the connecting component includes a channel 2 opened in the valve body, the channel 2 is connected with the channel 1, the valve body is provided with a channel 3, the channel 2 is connected with the channel 3, the channel 3 is connected with the channel 5, and the bottom of the valve body is provided with a channel 4, the channel 4 is connected with the channel 3; wherein, the liquid in the channel 1 flows through the connecting component and flows into the equalizing groove 2 through the channel 5. When the equalizing groove 2 is filled with liquid, the pressure in the equalizing groove 1 and the equalizing groove 2 is kept balanced, and then the liquid in the equalizing groove 1 is squeezed into the channel 1 under the action of resetting, so as to circulate and ensure that the liquid pressure tends to be balanced.

[0012] Furthermore, the blocking assembly includes a connecting block 2 fixedly connected to the inner wall of the valve body, the inner wall of the connecting block 2 is slidably connected to a slider, and the slider is provided with an elastic part; wherein, the liquid flows from channel 1 to channel 2, and flows to channel 3 under the action of the blocking assembly, and is finally discharged from channel 4, and the liquid backflow is prevented under the action of the blocking assembly.

[0013] Furthermore, the reset component includes a limit block fixedly connected to the inner wall of the valve body, the inner wall of the equalizing groove one is fixedly connected with a connecting block three, the inner wall of the connecting block three is fixedly connected with a spring three, and the rear side of the spring three is fixedly connected to the slide rod two; wherein, when the slide rod two moves to the limit block, it will stop moving under the action of the limit block, and when the equalizing groove two is filled with liquid so that the pressure in the equalizing groove two and the equalizing groove one is balanced, the slide rod two will reset under the action of the spring three and squeeze out the liquid in the equalizing groove one, and after the slide rod two is reset, the slide rod two will block the channel five. At this time, the pressure is unbalanced, and the liquid will re-enter the equalizing groove one through the channel six.

[0014] Furthermore, the sealing member includes a valve 1 which is slidably connected to the inner wall of the connecting block 1, a spring 1 is fixedly connected to the top of the valve 1, and the top of the spring 1 is fixedly connected to the connecting block 1; the elastic member includes a valve 2 which is fixedly connected to the front side of the slider, a spring 2 is sleeved on the outer wall of the slider, the front side of the spring 2 is fixedly connected to the valve 2, and the rear side of the valve 2 is fixedly connected to the slider; wherein, when the connecting block 1 slides down, the valve 1 will first contact the channel 1, and then the spring 1 will be squeezed through the valve 1 to generate elastic force, thereby ensuring sealing, and when the liquid flows from the channel 1 into the channel 2, it will impact the valve 2, causing it to drive the slider to slide into the connecting block 2, thereby causing the spring 2 to generate elastic force, ensuring that the valve 2 is reset after the liquid stops entering, thereby blocking the connection between the channel 1 and the channel 2.

[0015] The present invention has the following beneficial effects: (1) The present invention sets a throttling part. When it is necessary to allow liquid to enter the valve body, the integrated amplifier can be started to control the electromagnet to drive the slide rod 1 to slide in the limit tube. When the slide rod 1 slides to the preset position, it will send a signal to the integrated amplifier under the action of the LVDT displacement sensor to control the slide rod 1 to stop sliding. When the slide rod 1 slides, it will drive the valve 1 to move upward through the connecting block 1, so that the channel 1 is connected with the channel 6 and the channel 2. When the control slide rod 1 slides downward, the valve 1 will first contact the channel 1, and then the spring 1 will be squeezed by the valve 1 to cause it to undergo elastic deformation and generate elastic force. Under the action of the elastic force and the valve 1, the connection between the channel 1 and the outside world will be blocked, thereby preventing the liquid from entering the valve body. The entry of the valve body, and the slide bar one controls the sliding of the connecting block one, which controls the compression degree of the spring one. When the liquid enters the valve body from the bottom of the channel one, it impacts the valve one, causing it to slide into the valve assembly. The compression degree of the spring one is proportional to the amount of liquid flowing into the valve body, thereby controlling the flow rate. It can realize liquid flow control, use the LVDT displacement sensor and the integrated amplifier to adjust the position of the slide bar, and combine with the electromagnet drive to achieve fast response, quickly connect or cut off the channel, adaptively adjust the flow rate, reduce fluctuations and provide overload protection; the integrated design of each component has a compact structure, reduces external interference, realizes dynamic, stable and reliable two-way flow control, is suitable for automation scenarios, and effectively improves the overall performance and service life of the system.

[0016] (2) The present invention sets 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 with channel three, and liquid will flow from channel two into channel three. When the impact force of the liquid 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 the liquid can only flow from channel two into channel three and cannot flow in the opposite direction. The liquid entering channel three will be discharged from channel four. The dynamic balance between the impact force of the liquid and the elastic force of the spring can be used to control the opening and closing of valve two, ensuring that the liquid can only flow from channel two to channel three, effectively blocking the reverse flow and ensuring the stable operation of the device.

[0017] (3) The present invention sets a pressure regulating part. When the liquid enters channel one, it will rush into the equalizing groove one from channel six and squeeze the slide bar two to move it to the rear side. At this time, the spring three will undergo elastic deformation and generate elastic force. When the slide bar two slides, the connection between channel five and channel three will be opened. At this time, the liquid in channel three will flow from channel five into the equalizing groove two, so that the pressure in the equalizing groove two and the equalizing groove one is kept balanced. When the pressure is kept balanced, the elastic force of spring three loses the balance and will drive the slide bar two to slide toward the connecting block three, thereby squeezing out the liquid in the equalizing groove one. When the slide bar two slides toward the connecting block three, it will close channel three and channel five. At this time, the pressure balance is broken, thus completing the cycle. The pressure tends to be balanced under the cycle. When the device is running, it can be automatically adjusted by the pressure of the liquid to avoid the situation of unstable pressure. The function is realized by the linkage of mechanical parts, without the need for complex electronic control components, simplifying the system structure and improving the anti-interference ability.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the right side of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the communication component of the present invention; Figure 3 It is a partial cross-sectional structural schematic diagram of the backflow prevention part of the present invention; Figure 4 It is a partial cross-sectional structural schematic diagram of the voltage regulating portion of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of A; Figure 6 It is a partial cross-sectional structural schematic diagram of the blocking component of the present invention; Figure 7 Schematic diagram of the overall structure of the spring three of the present invention; Figure 8 It is a partial cross-sectional structural schematic diagram of the sliding assembly of the present invention; Figure 9 It is a partial cross-sectional structural schematic diagram of the valve assembly of the present invention.

[0021] In the accompanying drawings, the components represented by each symbol are listed as follows: In the figure: 101, valve body; 102, integrated amplifier; 103, LVDT displacement sensor; 2, throttling part; 21, sliding assembly; 211, electromagnet; 212, limit tube; 213, slide rod 1; 22, valve assembly; 221, channel 1; 222, connecting block 1; 223, valve 1; 224, spring 1; 3, backflow prevention part; 31, connecting assembly; 311, channel 2; 312, channel 3; 313, channel 4; 32, blocking assembly; 321, connecting block 2; 322, slider; 323, valve 2; 324, spring 2; 4, pressure regulating part; 401, equalizing groove 1; 402, equalizing groove 2; 403, channel 5; 404, slide rod 2; 405, limit block; 406, connecting block 3; 407, spring 3; 408, channel 6. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also 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 arranged on the valve body 101, and an LVDT displacement sensor 103 is fixedly connected to the top of the valve body 101. The valve body 101 also includes: a throttle part 2, which is arranged in the valve body 101 and is used to control the flow; an anti-backflow part 3, which is installed in the valve body 101 and is used to prevent backflow; and a pressure regulating part 4, which is located in the valve body 101 and is used to balance the pressure; wherein the integrated amplifier 102 controls the operation of the throttle part 2, allowing the liquid to enter the valve body 101 and then flow out through the anti-backflow part 3, and the pressure regulating part 4 is used to balance the liquid pressure in the valve body 101.

[0024] The throttling part 2 includes a sliding component 21, which is located in the valve body 101; and a valve component 22, which is located at the bottom of the sliding component 21; wherein the control signal in the integrated amplifier 102 is transmitted to the sliding component 21 through the LVDT displacement sensor 103, and then controls the operation of the valve component 22, thereby controlling the flow rate, and the sliding component 21 includes an electromagnet 211 fixedly connected to the inner wall of the valve body 101, and the inner wall of the valve body 101 is fixedly connected to a limit tube 212, and the limit tube 212 passes through the electromagnet 211, and the inner wall of the limit tube 212 is slidably connected to a slide rod 213, and the slide rod 213 passes through the limit tube 212. The top of the LVDT displacement sensor 103 extends into the LVDT displacement sensor 103; wherein, through the detection of the LVDT displacement sensor 103, the signal is transmitted to the integrated amplifier 102, and then the integrated amplifier 102 controls the electromagnet 211, so that it drives the slide rod 213 to slide through the limit tube 212, and the valve assembly 22 includes a channel 221 opened at the bottom of the valve body 101, and the inner wall of the channel 221 is slidably connected to the connecting block 222, the bottom of the slide rod 213 is fixedly connected to the connecting block 222, and a sealing member is provided in the connecting block 222, and the channel 221 is connected to the channel 6 408; wherein, when the slide rod 213 slides, The connecting block 1 222 is driven to slide in the channel 1 221 and the flow of the liquid is controlled by the sealing member. The sealing member includes a valve 1 223 which is slidably connected to the inner wall of the connecting block 1 222. The top of the valve 1 223 is fixedly connected to a spring 1 224. The top of the spring 1 224 is fixedly connected to the connecting block 1 222. When the connecting block 1 222 slides down, the valve 1 223 is firstly contacted with the channel 1 221, and then the spring 1 224 is squeezed by the valve 1 223 to generate elastic force, thereby ensuring the seal. When the liquid flows from the channel 1 221 into the channel 2 311, it will impact the valve 2 323, causing it to drive the slider 322 to slide into the connecting block 2 3 21, thereby making spring 2 324 generate elastic force, ensuring that valve 2 323 resets after 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, and the LVDT displacement sensor 103 and the integrated amplifier 102 are used to adjust the position of the slide bar. Combined with the electromagnet 211 drive, fast response is achieved, and the channel can be quickly connected or cut off, the flow can be adaptively adjusted, fluctuations can be reduced, and overload protection can be provided. The integrated design of each component has a compact structure, reduces external interference, and realizes dynamic, stable and reliable two-way flow control. It is suitable for automation scenarios and effectively improves the overall performance and service life of the system.

[0025] The anti-backflow part 3 includes a connecting component 31, which is arranged in the valve body 101 to ensure the circulation of the liquid; and a blocking component 32, which is installed in the valve body 101; wherein the blocking component 32 is used to ensure the stability of the liquid flow in the connecting component 31 to prevent the liquid from flowing back. The connecting component 31 includes a second channel 311 opened in the valve body 101, and the second channel 311 is connected to the first channel 221. The valve body 101 is provided with a third channel 312, and the second channel 311 is connected to the first channel 221. The channel 3 312 is connected, and the channel 3 312 is connected to the channel 5 403. The bottom of the valve body 101 is provided with a channel 4 313, and the channel 4 313 is connected to the channel 3 312. Among them, the liquid in the channel 1 221 flows through the connecting component 31 and flows into the equalizing groove 2 402 through the channel 5 403. When the equalizing groove 2 402 is filled with liquid, the pressure in the equalizing groove 1 401 and the equalizing groove 2 402 is balanced, and then the liquid in the equalizing groove 1 401 is squeezed out under the action of reset. The liquid flows into the first channel 221 and circulates in this way to ensure that the liquid pressure tends to be balanced. The blocking component 32 includes a second connecting block 321 fixedly connected to the inner wall of the valve body 101. The inner wall of the second connecting block 321 is slidably connected to a slider 322, and an elastic member is provided on the slider 322. Among them, the liquid flows from the first channel 221 to the second channel 311, and flows to the third channel 312 under the action of the blocking component 32, and finally is discharged from the fourth channel 313. Under the action of the blocking component 32, the liquid backflow is prevented; the elastic member It includes a valve 2 323 fixedly connected to the front side of the slider 322, and the outer wall of the slider 322 is provided with a spring 2 324. The front side of the spring 2 324 is fixedly connected to the valve 2 323, and the rear side of the valve 2 323 is fixedly connected to the slider 322. By providing the anti-backflow part 3, the dynamic balance between the liquid impact force and the spring elastic force can be utilized to control the opening and closing of the valve 2 323, ensuring that the liquid can only flow from the channel 2 311 to the channel 3 312, effectively blocking the reverse flow, and ensuring the stable operation of the device.

[0026] The pressure regulating part 4 includes a pressure-smoothing groove 1 401 provided in the valve body 101, a pressure-smoothing groove 2 402 provided in the valve body 101, a channel 5 403 provided in the valve body 101, the channel 5 403 is communicated with the pressure-smoothing groove 2 402, the inner wall of the pressure-smoothing groove 1 401 is slidably connected with a slide rod 2 404, the rear side of the slide rod 2 404 extends into the anti-backflow part 3, a reset member is provided on the front side of the slide rod 2 404, a channel 6 408 is provided in the valve body 101, and the left side of the channel 6 408 is communicated with the pressure-smoothing groove 1 401; wherein, when the front side of the slide rod 2 404 in the pressure-smoothing groove 1 401 is filled with liquid, the slide rod 2 404 is pushed to slide backward, and the reset member includes a limit block 405 fixedly connected to the inner wall of the valve body 101, the inner wall of the pressure-smoothing groove 1 401 is fixedly connected with a connecting block 3 406, and the inner wall of the connecting block 3 406 is fixedly connected with a spring 3 407 , the rear side of spring three 407 is fixedly connected to slide bar two 404; wherein, when slide bar two 404 moves to the limit block 405, it will stop moving under the action of the limit block 405, and when the equalizing groove two 402 is filled with liquid to keep the pressure in the equalizing groove two 402 and the equalizing groove one 401 balanced, slide bar two 404 will reset under the action of spring three 407 and squeeze out the liquid in the equalizing groove one 401, and after slide bar two 404 resets, slide bar two 404 will block channel five 403. At this time, the pressure is unbalanced, and the liquid will re-enter the equalizing groove one 401 through channel six 408. By setting the pressure regulating part 4, it can be automatically adjusted by the pressure of the liquid when the device is running, avoiding the situation of unstable pressure, and realizing the function through the linkage of mechanical parts, without the need for complex electronic control components, simplifying the system structure and improving the anti-interference ability.

[0027] During use, when it is necessary to allow liquid to enter the valve body 101, the integrated amplifier 102 can be started to control the electromagnet 211 to drive the slide bar 1 213 to slide in the limit tube 212. When the slide bar 1 213 slides to the preset position, the LVDT displacement sensor 103 will send a signal to the integrated amplifier 102 to control the slide bar 1 213 to stop sliding. When the slide bar 1 213 slides, it will drive the valve 1 223 to move upward through the connecting block 1 222, so that the channel 1 221 is connected with the channel 6 408 and the channel 2 311. When the control slide bar 1 213 slides downward, the valve 1 223 will first contact with the channel 1 221, and then the spring 1 224 will be squeezed through the valve 1 223. , causing it to deform elastically and generate elastic force. Under the action of the elastic force and valve 1 223, the connection between channel 1 221 and the outside world is blocked, thereby preventing the entry of liquid. The slide rod 1 213 controls the sliding of the connecting block 1 222, which controls the compression degree of the spring 1 224. When the liquid enters the valve body 101 from the bottom of the channel 1 221, it impacts the valve 1 223, causing it to slide into the valve assembly 22. The compression degree of the spring 1 224 is proportional to the amount of liquid flowing into the valve body 101, thereby achieving flow control. When the liquid enters the valve body 101 from the channel 1 221, it will flow into the channel 2 311 and impact the valve 2 323, causing the slider 322 to slide into the connecting block 2 321 and causing the spring 2 324 to produce When the valve 2 323 moves away from the channel 2 311, the channel 2 311 is connected to the channel 3 312, and the liquid flows from the channel 2 311 into the channel 3 312. When the impact force of the liquid in the channel 2 311 is less than the elastic force of the spring 2 324, the spring 2 324 releases the elastic force to gradually reset the valve 2 323. When the liquid in the channel 2 311 is less than a certain level, the valve 2 323 blocks the connection between the channel 2 311 and the channel 3 312, so that the liquid can only flow from the channel 2 311 into the channel 3 312, but cannot flow in the opposite direction. The liquid in the channel 3 312 will be discharged from the channel 4 313. When the liquid enters the channel 1 221, it will rush into the equalizing groove 1 401 from the channel 6 408 and squeeze the slide rod. When the slide bar 404 slides, the connection between the channel 5 403 and the channel 3 312 is opened. At this time, the liquid in the channel 3 312 flows from the channel 5 403 into the equalizing groove 2 402, thereby keeping the pressure in the equalizing groove 2 402 and the equalizing groove 1 401 balanced. When the pressure is balanced, the elastic force of the spring 3 407 loses the balance and drives the slide bar 2 404 to slide toward the connecting block 3 406, thereby squeezing out the liquid in the equalizing groove 1 401. When the slide bar 2 404 slides toward the connecting block 3 406, the channel 3 312 and the channel 5 403 are closed. At this time, the pressure balance is broken, thereby completing the cycle, and the pressure tends to be balanced under the cycle.

[0028] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present 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) arranged 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: A throttling portion (2), the throttling portion (2) being arranged in the valve body (101) and used for controlling flow; a backflow prevention portion (3), the backflow prevention portion (3) being installed in the valve body (101) and used for preventing backflow; and A pressure regulating portion (4), the pressure regulating portion (4) being located in the valve body (101) and being used for balancing pressure; The integrated amplifier (102) controls the operation of the throttling part (2), allowing the liquid to enter the valve body (101) and then flow out through the anti-backflow part (3), while the pressure regulating part (4) is used to balance the liquid pressure in the valve body (101).

2. The integrated LVDT and high protection proportional speed control valve according to claim 1, characterized in that: The throttling portion (2) comprises a sliding assembly (21), and the sliding assembly (21) is located in the valve body (101); and A valve assembly (22), wherein the valve assembly (22) is located at the bottom of the sliding assembly (21); The control signal in the integrated amplifier (102) is transmitted to the sliding assembly (21) via the LVDT displacement sensor (103), and then controls the operation of the valve assembly (22), thereby controlling the flow rate.

3. The integrated LVDT and high protection proportional speed control valve according to claim 2, characterized in that: The backflow prevention portion (3) includes a communication component (31), and the communication component (31) is arranged in the valve body (101) to ensure the circulation of liquid; and a blocking assembly (32), the blocking assembly (32) being installed in the valve body (101); The blocking component (32) is used to ensure the stability of the liquid flow direction in the connecting component (31) and prevent liquid backflow.

4. The integrated LVDT and high protection proportional speed control valve according to claim 3, characterized in that: The pressure regulating portion (4) includes a pressure-equalizing groove (401) provided in the valve body (101), a pressure-equalizing groove (402) provided in the valve body (101), a channel (403) provided in the valve body (101), the channel (403) being connected to the pressure-equalizing groove (402), a slide bar (404) being slidably connected to the inner wall of the pressure-equalizing groove (401), the rear side of the slide bar (404) extending into the backflow prevention portion (3), a reset member being provided on the front side of the slide bar (404), a channel (408) being provided in the valve body (101), the left side of the channel (408) being connected to the pressure-equalizing groove (401); When the front side of the second slide bar (404) in the flattening groove (401) is filled with liquid, the second slide bar (404) is pushed to slide backward.

5. The integrated LVDT and high protection proportional speed control valve according to claim 4, characterized in that: The sliding assembly (21) includes an electromagnet (211) fixedly connected to the inner wall of the valve body (101), the inner wall of the valve body (101) is fixedly connected to a limit tube (212), the limit tube (212) passes through the electromagnet (211), the inner wall of the limit tube (212) is slidably connected to a slide rod (213), the slide rod (213) passes through the limit tube (212), and the top of the slide rod (213) extends into the LVDT displacement sensor (103); The LVDT displacement sensor (103) detects and transmits the signal to the integrated amplifier (102), and then the integrated amplifier (102) controls the electromagnet (211) to drive the slide bar (213) to slide through the limit tube (212).

6. The integrated LVDT and high protection proportional speed control valve according to claim 5, characterized in that: The valve assembly (22) includes a channel 1 (221) provided at the bottom of the valve body (101), the inner wall of the channel 1 (221) is slidably connected to a connecting block 1 (222), the bottom of the sliding rod 1 (213) is fixedly connected to the connecting block 1 (222), a sealing member is provided in the connecting block 1 (222), and the channel 1 (221) is connected to the channel 6 (408); When the slide rod 1 (213) slides, it drives the connecting block 1 (222) to slide in the channel 1 (221) and controls the flow of the liquid through the sealing member.

7. The integrated LVDT and high protection proportional speed control valve according to claim 6, characterized in that: The connecting component (31) includes a second channel (311) provided in the valve body (101), the second channel (311) being connected to the first channel (221), a third channel (312) provided 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) provided at the bottom of the valve body (101), the fourth channel (313) being connected to the third channel (312); The liquid in channel 1 (221) flows through the connecting component (31) and flows into the equalizing groove 2 (402) through channel 5 (403). When the equalizing groove 2 (402) is filled with liquid, the pressure in the equalizing groove 1 (401) and the equalizing groove 2 (402) is kept in balance. Then, under the action of reset, the liquid in the equalizing groove 1 (401) is squeezed into the channel 1 (221), thereby circulating to ensure that the liquid pressure tends to be balanced.

8. The integrated LVDT and high protection proportional speed control valve according to claim 7, characterized in that: The blocking assembly (32) comprises a second connecting block (321) fixedly connected to the inner wall of the valve body (101), the inner wall of the second connecting block (321) is slidably connected to a slider (322), and an elastic member is provided on the slider (322); The liquid flows from channel 1 (221) to channel 2 (311), and flows to channel 3 (312) under the action of the blocking component (32), and finally is discharged from channel 4 (313), and the backflow of the liquid is prevented under the action of the blocking component (32).

9. The integrated LVDT and high protection proportional speed control valve according to claim 8, characterized in that: The reset member includes a limit block (405) fixedly connected to the inner wall of the valve body (101), the inner wall of the flattening groove (401) is fixedly connected to a connection block (406), the inner wall of the connection block (406) is fixedly connected to a spring (407), and the rear side of the spring (407) is fixedly connected to the slide rod (404); Among them, when the slide bar 2 (404) moves to the limit block (405), it will stop moving under the action of the limit block (405). When the equalizing groove 2 (402) is filled with liquid so that the pressure in the equalizing groove 2 (402) and the equalizing groove 1 (401) are balanced, the slide bar 2 (404) will be reset under the action of the spring 3 (407) and squeeze out the liquid in the equalizing groove 1 (401). After the slide bar 2 (404) is reset, the slide bar 2 (404) will block the channel 5 (403). At this time, the pressure is unbalanced and the liquid will re-enter the equalizing groove 1 (401) through the channel 6 (408).

10. The integrated LVDT and high protection proportional speed control valve according to claim 9, characterized in that: The sealing member includes a valve 1 (223) slidably connected to the inner wall of the connecting block 1 (222), the top of the valve 1 (223) is fixedly connected to a spring 1 (224), and the top of the spring 1 (224) is fixedly connected to the connecting block 1 (222); The elastic member includes a second valve (323) fixedly connected to the front side of the slider (322), a second spring (324) is provided on the outer wall of the slider (322), the front side of the second spring (324) is fixedly connected to the second valve (323), and the rear side of the second valve (323) is fixedly connected to the slider (322); When the connecting block 1 (222) slides down, the valve 1 (223) will first contact the channel 1 (221), and then the spring 1 (224) will be squeezed by the valve 1 (223), so that it will generate elastic force, thereby ensuring sealing. When the liquid flows from the channel 1 (221) into the channel 2 (311), it will impact the valve 2 (323), so that it drives the slider (322) to slide into the connecting block 2 (321), thereby making the spring 2 (324) generate elastic force, ensuring that the valve 2 (323) is reset after the liquid stops entering, thereby blocking the connection between the channel 1 (221) and the channel 2 (311).

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