Ultrahigh-pressure automatic control damping valve

Abstract

The utility model belongs to the technical field of back pressure valves, and particularly relates to an ultrahigh-pressure automatic control damping valve which comprises a valve body, a screw rod and an adjusting nut which are communicated in sequence, a cavity channel is formed in the valve body, the screw rod and the adjusting nut, a sealing head and a linear motion mechanism which are connected are contained in the cavity channel in sequence, and a driving mechanism is connected outside the adjusting nut. A cavity is formed in the valve body, a fluid inlet is formed in the valve body, the sealing head is arranged in the cavity, and the fluid inlet is tightly attached to the front end of the sealing head. And a pressure sensor is arranged on a pipeline communicated with the fluid inlet. The pressure in the valve body is automatically and accurately adjusted, the stability of the pressure is guaranteed, and the abnormal condition caused by unstable pressure is eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of back pressure valves, and in particular relates to an ultra-high pressure automatic control damping valve. Background Art

[0002] With the rapid development of my country's analytical instrument industry, analytical instrument testing has become increasingly important. Testing is a crucial step and tool in the development of testing instruments. The pressure resistance of analytical instruments is also a key indicator, especially with the emergence of overpressure instruments, for which testing equipment is a crucial means of verifying their performance. However, most current backpressure devices are overly manual, and backpressure stability and pressure resistance cannot be guaranteed.

[0003] Prior art CN111927994A discloses an adjustable back-pressure valve device for high-pressure systems and its use method. The device comprises a connected upper valve body and a lower valve body, with a joint disposed at the top of the upper valve body and a valve seat disposed within the upper valve body. A sapphire seat is disposed at the bottom of the valve seat. A ruby ​​ball serves as the valve core, and the sapphire seat serves as the valve seat. The ruby ​​ball and the sapphire seat cooperate to achieve a back-pressure function. However, the prior art sapphire ball cannot withstand the pressure under ultrahigh-pressure conditions.

[0004] Prior art CN211649241U discloses an ultra-high-pressure back-pressure valve that uses a piston rod structure combined with an O-ring and high-strength plastic to create a high-pressure seal. A 40° conical seal is typically used at the valve core head, and the back pressure is manually adjusted via an adjusting rod. This prior art's adjusting rod lacks guaranteed accuracy, resulting in large pressure fluctuations and an inability to maintain stable pressure.

[0005] Prior art CN103807473A discloses a back pressure valve that uses a check rod and spring structure and a manual adjustment valve to achieve pressure regulation. This valve also provides real-time pressure feedback, allowing manual pressure adjustment based on the feedback. This prior art requires manual pressure adjustment, and due to the poor precision of manual adjustment, pressure accuracy cannot be guaranteed. Utility Model Content

[0006] In order to solve the above technical problems, namely, the existing back pressure valve cannot withstand the pressure under ultra-high pressure conditions; the back pressure is manually adjusted, the accuracy of the back pressure cannot be guaranteed, the pressure fluctuates greatly, and stable pressure operation cannot be guaranteed;

[0007] The utility model provides the following technical solutions:

[0008] An ultra-high pressure automatic control damping valve comprises a valve body, a screw, and an adjusting nut connected in sequence. The valve body, the screw, and the adjusting nut form a cavity inside, and the cavity sequentially accommodates a connected sealing head and a linear motion mechanism. The adjusting nut is externally connected to a driving mechanism.

[0009] A cavity is provided inside the valve body, a fluid inlet is provided on the valve body, the fluid inlet is communicated with the cavity, a sealing head is provided in the cavity, and the fluid inlet is closely attached to the front end of the sealing head;

[0010] A pressure sensor is provided on the pipe connected to the fluid inlet; the driving mechanism drives the adjusting nut to move, and the adjusting nut pushes the linear motion mechanism, thereby pushing the sealing head to move back and forth, so that different gaps are formed between the sealing head and the valve body, thereby realizing back pressure.

[0011] Furthermore, it also includes a control board connected to the pressure sensor, and the control board is connected to the motor; the control board is used to receive the pressure value of the pressure sensor, and compare the pressure value of the pressure sensor with the preset pressure value in the control board, and control the movement direction of the drive mechanism.

[0012] Furthermore, the linear motion mechanism includes a damping valve push rod, a pressure column, and a spring connected in sequence, and the sealing head is connected to the damping valve push rod, the front end of the damping valve push rod is located in the cavity, the tail end of the damping valve push rod is located in the screw, the rod body of the pressure column is sleeved with a spring, and the front ends of the pressure column and the spring are embedded in the screw; the rear end of the spring is embedded in the adjusting nut; the damping valve push rod is pushed by the pressure column and the contraction movement of the spring to achieve forward and backward movement.

[0013] Furthermore, the driving mechanism is a motor, and the adjusting nut is connected to the motor via a coupling.

[0014] Furthermore, it also includes a motor fixing frame, a slider, and a guide rail. The bottom of the motor is connected to the motor fixing frame, and the motor fixing frame is installed between the two guide rails through the slider.

[0015] Furthermore, limit posts are provided at the front and rear of the guide rail.

[0016] Furthermore, the front end of the screw is threadedly connected to the valve body, and the front end of the screw in contact with the valve body is also provided with a primary sealing ring; the rear end of the screw in contact with the valve body is provided with an O-ring.

[0017] Furthermore, the outside of the tail end of the screw is threadedly connected to a nut, and the nut is located at the front end of the adjusting nut.

[0018] Furthermore, the fluid inlet of the valve body is connected to an inlet connection terminal through a pipeline.

[0019] Furthermore, a fluid outlet is provided on the valve body, the fluid outlet is communicated with the upper portion of the cavity, and the fluid outlet of the valve body is connected to an outlet connection terminal via a pipeline.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This ultra-high-pressure, automatically controlled damping valve provides real-time pressure feedback via a pressure sensor. A drive mechanism drives the adjustment nut, which in turn pushes the linear motion mechanism, which in turn moves the sealing head back and forth, creating varying gaps between the sealing head and the valve body. This creates back pressure and automatically adjusts the pressure. This high-precision, automatic adjustment method maintains pressure at a set value, ensuring pressure stability and eliminating abnormalities caused by unstable pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the side-cut structure of the damping valve body of the present utility model;

[0023] Figure 2 This is a side cutaway view of the overall structure of the ultra-high pressure automatic control damping valve of the present utility model;

[0024] Figure 3 This is a schematic top view of the overall structure of the ultra-high pressure automatic control damping valve of the present utility model;

[0025] Description of reference numerals:

[0026] 1 is the valve body; 101 is the cavity; 2 is the sealing head; 3 is the screw; 4 is the damping valve push rod; 5 is the pressure column; 6 is the adjusting nut; 7 is the coupling; 8 is the motor; 801 is the output shaft; 802 is the motor fixing bracket;

[0027] 9 is a primary sealing ring; 10 is an O-ring; 11 is a nut; 12 is a spring; 13 is a guide rail; 14 is a slider; 15 is a front limit post; 16 is a rear limit post; 17 is a fluid inlet; 1701 is an inlet connection terminal; 18 is a fluid outlet; 1801 is an outlet connection terminal; 19 is a pressure sensor; and 20 is a control board. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Combine Figure 1-3 As shown, the present invention provides an ultra-high-pressure automatic control damping valve, comprising a damping valve body, a damping valve support structure, and a damping valve automatic control system. The damping valve body comprises a valve body 1, which defines a cavity 101 therein. A fluid inlet 17 and a fluid outlet 18 are provided on the valve body 1. The fluid inlet 17 communicates with the front end of the cavity 101, and the fluid outlet 18 communicates with the upper portion of the cavity 101. A sealing head 2 is mounted within the cavity 101, with the fluid inlet 17 closely attached to the front end of the sealing head 2. The fluid inlet 17 is used to introduce the fluid to be controlled. The fluid outlet 18 is used to output the fluid after damping adjustment.

[0031] The rear end of the sealing head 2 is connected to a damping valve push rod 4, the front end of which is sleeved on the rear end of the sealing head 2. The front end of the damping valve push rod 4 is located in the cavity 101, and the rear end of the damping valve push rod 4 is located in the screw 3. The screw 3 is a hollow structure, and the interior of the screw 3 is connected to the cavity 101.

[0032] The front end of the screw 3 is threadedly connected to the valve body 1. A primary sealing ring 9 is provided at the front end of the screw 3 where it contacts the valve body 1, and an O-ring 10 is provided at the rear end where it contacts the valve body 1. The screw 3 is secured to the valve body 1 through the threads, primary sealing ring 9, and O-ring 10, improving the sealing performance of the connection between the screw 3 and the valve body 1 and preventing fluid leakage. A nut 11 and an adjustment nut 6 are threadedly connected to the rear end of the screw 3.

[0033] The tail end of the damping valve push rod 4 is connected to the head of the pressure column 5. A spring 12 is sleeved on the rod of the pressure column 5. The front ends of the pressure column 5 and the spring 12 are embedded in the screw 3. The rear end of the spring 12 is embedded in the adjustment nut 6. The damping valve push rod 4 moves forward and backward under the push of the pressure column 5 and the contraction of the spring 12.

[0034] The rear end of the adjusting nut 6 is connected to the motor 8 through the coupling 7. The output shaft 801 of the motor 8 is connected to the coupling 7. Driven by the motor 8, the adjusting nut 6 moves back and forth, causing the spring 12 to contract and deform, thereby driving the pressure column 5 to push the damping valve push rod 4, so that different gaps are formed between the sealing head 2 and the valve body 1, thereby realizing back pressure.

[0035] In a specific embodiment, the fluid inlet 17 of the valve body 1 is connected to an inlet connection terminal 1701 through a pipeline, and the fluid outlet 18 of the valve body 1 is connected to an outlet connection terminal 1801 through a pipeline.

[0036] The damping valve support structure includes a motor fixing frame 802 , a slider 14 , a guide rail 13 , and a limiting column. The motor fixing frame 802 is connected to the bottom of the motor 8 , and the motor fixing frame 802 is installed between the two guide rails 13 through the slider 14 .

[0037] In a specific embodiment, the guide rail 13 is provided with limiting posts at the front and rear, namely a front limiting post 15 and a rear limiting post 16. The limiting posts are used to prevent the slider 14 from sliding out of the guide rail 13 when an abnormality occurs.

[0038] The damping valve automatic control system includes a pressure sensor 1, a control panel 20, and a key display screen (not shown in the figure).

[0039] A pressure sensor 19 is provided on the pipe connecting the fluid inlet 17 and the inlet connection terminal 1701 for real-time monitoring of the flow path pressure into the valve body 1. The pressure sensor 19 is connected to a control board 20, which is connected to a key display screen and is connected to the motor 8.

[0040] The control panel 20, acting as the control center, receives the pressure value from the pressure sensor 19 in real time and compares it with a preset pressure value. Based on the comparison result, the control panel 20 controls the movement direction of the motor 8 to change the pressure of the fluid within the valve body 1. The key display not only displays the pressure value fed back by the pressure sensor 19 in real time but also allows the preset pressure value to be set via the key display.

[0041] In order to automatically control the motor to adjust the system pressure to the set pressure value, an automatic control algorithm is required. PID control is a commonly used automatic control algorithm in industry. This utility model uses an incremental PID algorithm for pressure regulation.

[0042] The working principle of this utility model:

[0043] The fluid enters the valve body 1 through the inlet connection terminal 1701, and the pressure sensor 19 can provide real-time feedback on the flow path pressure changes and send the data to the control board 20 in real time;

[0044] When the pressure feedback from the pressure sensor 19 is lower than the set pressure value, the control board 20 controls the motor 8 to rotate forward, driving the adjustment nut 6 forward, thereby compressing the spring 12. The compression of the spring 12 pushes the pressure column 5 and the damping valve push rod 4 forward, causing the gap between the sealing head 2 and the fluid inlet 17 to gradually narrow. This change increases the resistance to fluid flow, thereby increasing the fluid pressure.

[0045] When the pressure feedback from the pressure sensor 19 exceeds the set pressure value, the control board 20 controls the motor 8 to reverse, driving the adjustment nut 6 backward, releasing the compression force of the spring 12. The expansion of the spring 12 pushes the pressure column 5 and the damping valve push rod 4 backward, causing the gap between the sealing head 2 and the fluid inlet 17 to gradually increase. This change reduces the resistance to fluid flow, thereby lowering the fluid pressure.

[0046] The pressure sensor 19 feeds back the pressure value to the control panel 29 in real time, and the motor 8 will also respond in real time to adjust the left and right running distances to control the pressure to be stable.

[0047] Since the present invention adopts rigid connection and the sealing head is a high-pressure resistant component, the present invention can withstand ultra-high pressure systems above 100 MPa and meet the use requirements of high-pressure systems.

[0048] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0049] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An ultra-high pressure automatic control damping valve, characterized in that: The invention comprises a valve body (1), a screw rod (3), and an adjusting nut (6) which are connected in sequence, wherein a cavity is formed inside the valve body (1), the screw rod (3), and the adjusting nut (6), and the connected sealing head (2) and the linear motion mechanism are sequentially accommodated in the cavity, and the adjusting nut (6) is externally connected to a driving mechanism; A cavity (101) is provided inside the valve body (1), a fluid inlet (17) is provided on the valve body (1), the fluid inlet (17) is communicated with the cavity (101), the sealing head (2) is provided in the cavity (101), and the fluid inlet (17) is closely attached to the front end of the sealing head (2); A pressure sensor (19) is provided on a pipeline connected to the fluid inlet (17); a driving mechanism drives the adjusting nut (6) to move, and the adjusting nut (6) pushes the linear motion mechanism, thereby pushing the sealing head (2) to move forward and backward, so that different gaps are formed between the sealing head (2) and the valve body (1), thereby realizing back pressure.

2. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: The invention also includes a control board (20) connected to the pressure sensor (19), and the control board (20) is connected to the motor (8); the control board (20) is used to receive the pressure value of the pressure sensor (19) and control the movement direction of the driving mechanism.

3. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: The linear motion mechanism comprises a damping valve push rod (4), a pressure column (5), and a spring (12) connected in sequence, and a sealing head (2) is connected to the damping valve push rod (4); the front end of the damping valve push rod (4) is located in a cavity (101), the tail end of the damping valve push rod (4) is located in a screw rod (3), a spring (12) is sleeved on the rod body of the pressure column (5), and the front ends of the pressure column (5) and the spring (12) are embedded in the screw rod (3); the rear end of the spring (12) is embedded in the adjusting nut (6); the damping valve push rod (4) is pushed by the pressure column (5) and the spring (12) contracts, so as to realize forward and backward movement.

4. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: The driving mechanism is a motor (8), and the adjusting nut (6) is connected to the motor (8) via a coupling (7).

5. The ultra-high pressure automatic control damping valve according to claim 4, characterized in that: The motor (8) further comprises a motor fixing frame (802), a slider (14), and a guide rail (13). The bottom of the motor (8) is connected to the motor fixing frame (802), and the motor fixing frame (802) is installed between the two guide rails (13) through the slider (14).

6. The ultra-high pressure automatic control damping valve according to claim 5, characterized in that: The guide rail (13) is provided with limiting columns at the front and rear.

7. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: The front end of the screw (3) is threadedly connected to the valve body (1), and the front end of the screw (3) in contact with the valve body (1) is also provided with a primary sealing ring (9); the rear end of the screw (3) in contact with the valve body (1) is provided with an O-ring (10).

8. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: The tail end of the screw rod (3) is also threadedly connected to a nut (11), and the nut (11) is located at the front end of the adjustment nut (6).

9. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: The fluid inlet (17) of the valve body (1) is connected to an inlet connection terminal (1701) via a pipeline.

10. The ultra-high pressure automatic control damping valve according to claim 1, characterized in that: A fluid outlet (18) is also provided on the valve body (1), and the fluid outlet (18) is communicated with the upper portion of the cavity (101), and the fluid outlet (18) is connected to an outlet connection terminal (1801) via a pipeline.

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