High-pressure valve with overpressure relief function

Abstract

The utility model relates to the field of valves, in particular to a high-pressure valve with an overpressure relief function, which comprises a base, a main body, a valve core, an air inlet channel and an air outlet channel, the valve core moves up and down to switch the on-off state of the air inlet channel and the air outlet channel, the high-pressure valve further comprises a motor, a driving sleeve piece and an elastic piece, and the output end of the motor extends into the main body. The output end of the elastic piece is connected with the driving sleeve piece, the driving sleeve piece comprises a valve element conversion base arranged in the body in a sliding mode, a step is further arranged on the valve element, one end of the elastic piece makes contact with the step, and the other end of the elastic piece makes contact with the valve element conversion base. By arranging the valve element, the elastic body, the valve element conversion base, the air inlet channel and the air outlet channel, active pressure relief can be achieved by controlling the valve element to move up and down, the elastic body can be compressed by adjusting the position of the valve element conversion base, and therefore pressure relief can be achieved only when the pressure is larger than the elastic force generated after the elastic body deforms; therefore, overpressure relief is realized.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a high-pressure valve with overpressure relief function. Background Technology

[0002] In the field of super microwave digestion, a variety of highly corrosive acidic media (such as nitric acid, hydrochloric acid, aqua regia, etc.) are required, which leads to frequent problems with the sealing of pressure relief valves. In addition, sudden pressure increases or even exceeding limits often occur during the digestion process. If not handled properly, safety accidents may occur. Pressure relief valves seriously limit the development of super microwave in the field of hydrochloric acid applications.

[0003] Currently, most high-pressure acid-resistant valves on the market are lined with corrosion-resistant materials for corrosion protection. However, the lining layer is made of relatively soft non-metallic materials, which limits its application. Lining small-sized high-pressure valves is particularly difficult. Furthermore, the problem of sudden pressure surges exceeding limits is currently addressed by connecting rupture discs or pilot-operated relief valves in series in the pipeline. However, rupture discs are disposable valves and need to be replaced after rupture, while pilot-operated relief valves are prone to corrosion and leakage. Therefore, it is necessary to improve this structure to overcome the above-mentioned shortcomings. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a high-pressure valve with overpressure relief function. This utility model is achieved through the following technical solution:

[0005] A high-pressure valve with overpressure relief function includes a base, a body, and a valve core. One end of the body is fixedly connected to the base. The valve core is slidably disposed within the body. An air inlet channel is provided within the base, and an air outlet channel is provided within the body. The valve core switches the on / off state of the air inlet channel and the air outlet channel by moving up and down. The valve core also includes a valve cover, a motor, a drive assembly, and an elastic element. The valve cover is fixedly disposed on the end of the body away from the base. The motor is fixedly disposed on the valve cover, and its output end extends through the valve cover into the body. The output end of the motor is connected to the drive assembly. The drive assembly includes a valve core conversion seat, which is slidably disposed within the body and has a mounting hole. A limiting bolt is fixed to the valve core after it passes through the mounting hole. A step is also provided on the valve core. One end of the elastic element contacts the step, and the other end contacts the valve core conversion seat.

[0006] In the above technical solution: the base, body, and valve cover serve as the main components for setting up the remaining structures or parts; the air inlet and outlet channels form a pressure relief channel; the valve core is used to adjust the opening and closing of the pressure relief channel; the motor provides the power for the movement of the valve core; the drive kit converts the rotation output of the motor into linear movement; the elastic element allows the valve core to move downward after being subjected to a specified pressure, thereby realizing the overpressure relief function; the mounting hole allows the valve core to pass through; the setting of the limit bolt, step, and elastic element allows the valve core conversion seat to push the valve core upward, but not downward simultaneously.

[0007] A further feature of this invention is that the main body includes a valve seat and a valve body, one end of the valve seat is connected to the base, the other end is fixedly connected to the valve body, and the air outlet channel is disposed on the valve seat.

[0008] In the above technical solution, the main body consists of a valve seat and a valve body to facilitate the processing of the air outlet and air inlet channels.

[0009] A further feature of this invention is that the valve seat is provided with a sliding hole and an air passage, one end of the air passage is connected to the air inlet channel and the other end is connected to the sliding hole, the air outlet channel is connected to the side of the air passage, and the valve core includes a sliding column and a control rod fixed together, the sliding column is slidably disposed in the sliding hole, and the control rod is disposed in the air passage.

[0010] In the above technical solution: the sliding hole is used to limit the movement of the valve core by limiting the movement direction of the sliding column; the control rod is used to control the degree of closure of the air passage, thereby determining whether the air inlet passage and the air outlet passage are connected.

[0011] A further feature of this invention is that the diameter of the air passage is the same as the diameter of the control rod.

[0012] In the above technical solution, the diameter of the air passage is the same as the diameter of the control rod, so that the air passage will not leak into the valve body.

[0013] A further feature of this invention is that the drive kit also includes a drive base, which is fixedly connected to the output end of the motor and threadedly connected to the valve core conversion seat.

[0014] A further feature of this invention is that the main body is provided with an installation groove, a sensor baffle is provided in the installation groove, the sensor baffle is fixedly connected to the valve core conversion seat, and the width of the sensor baffle is the same as the width of the installation groove, so as to restrict the rotation of the valve core conversion seat.

[0015] In the above technical solution: the mounting groove is used to set the sensor baffle and cooperate with it to prevent the valve core conversion seat from rotating, so that after the drive seat and the valve core conversion seat are threadedly connected, the rotation of the motor can be converted into the vertical movement of the valve core conversion seat.

[0016] A further feature of this invention is that a sensor is provided on one or both sides of the mounting groove, and the sensor is fixedly connected to the main body.

[0017] In the above technical solution: the sensor is used to sense the position of the sensor baffle, thereby realizing the control of the valve core position or the degree of compression of the elastomer.

[0018] A further feature of this invention is that a valve core seal is provided at one end of the air outlet channel near the main body.

[0019] In the above technical solution: the valve core seal is used to improve the sealing performance.

[0020] This utility model discloses a high-pressure valve with overpressure relief function, which, compared with the prior art:

[0021] 1. This utility model, by setting a valve core, an elastic body, a valve core conversion seat, an air inlet channel and an air outlet channel, enables both active pressure relief by controlling the up and down movement of the valve core, and compression of the elastic body by adjusting the position of the valve core conversion seat, so that pressure relief will only occur when the pressure is greater than the elastic force of the elastic body after deformation, thereby achieving overpressure relief.

[0022] 2. This utility model also enables the quantitative setting of the overpressure limit value through the setting of sensors, sensor baffles and motors, making the overpressure release more accurate. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the present invention;

[0024] Figure 2 This is a schematic diagram of the active pressure relief function of this utility model.

[0025] The numbers and letters in the diagram represent the following component names: 10-Base; 101-Inlet channel; 20-Main body; 201-Valve seat; 201a-Outlet channel; 201b-Sliding hole; 201c-Air passage; 202-Valve body; 202a-Mounting groove; 30-Valve core; 301-Step; 302-Sliding column; 303-Control lever; 40-Valve cover; 50-Motor; 60-Drive kit; 601-Valve core conversion seat; 601a-Mounting hole; 602-Drive seat; 70-Elastic element; 80-Limit bolt; 90-Sensor baffle; 110-Sensor; 120-Valve core seal. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0027] like Figure 1 and 2 As shown, this utility model proposes a high-pressure valve with overpressure relief function, including a base 10, a main body 20, and a valve core 30. One end of the main body 20 is fixedly connected to the base 10. The valve core 30 is slidably disposed within the main body 20. An air inlet channel 101 is provided within the base 10, and an air outlet channel 201a is provided within the main body 20. The valve core 30 switches the on / off state of the air inlet channel 101 and the air outlet channel 201a by moving up and down. The valve also includes a valve cover 40, a motor 50, a drive assembly 60, and an elastic element 70. The valve cover 40 is fixedly disposed on the end of the main body 20 away from the base 10. The motor 50 is fixedly mounted on the valve cover 40, and the output end of the motor 50 extends through the valve cover 40 into the main body 20. The output end of the motor 50 is connected to the drive assembly 60. The drive assembly 60 includes a valve core conversion seat 601, which is slidably disposed within the main body 20. The valve core conversion seat 601 has a mounting hole 601a. ​​The valve core 30 passes through the mounting hole 601a and is fixed with a limiting bolt 80. The valve core 30 also has a step 301. One end of the elastic element 70 contacts the step 301, and the other end contacts the valve core conversion seat 601. The motor 50 is a geared motor to increase torque. The interior of the air intake channel 101 and the air outlet channel 201a are coated with a corrosion-resistant material. Preferably, the elastic element is a spring, and the spring is sleeved on the valve core 30.

[0028] like Figure 1 and 2 As shown, this utility model proposes a high-pressure valve with overpressure relief function. The main body 20 includes a valve seat 201 and a valve body 202. One end of the valve seat 201 is connected to the base 10, and the other end is fixedly connected to the valve body 202. The air outlet channel 201a is provided on the valve seat 201. A sealing ring is provided between the valve seat 201 and the valve body 202.

[0029] like Figure 1 and 2As shown, this utility model proposes a high-pressure valve with overpressure relief function. The valve seat 201 has a sliding hole 201b and an air passage 201c. One end of the air passage 201c communicates with the air inlet channel 101, and the other end communicates with the sliding hole 201b. The air outlet channel 201a communicates with the side of the air passage 201c. The valve core 30 includes a sliding column 302 and a control rod 303 fixed together. The sliding column 302 is slidably disposed within the sliding hole 201b, and the control rod 303 is disposed within the air passage 201c. The sliding hole 201b and the air passage 201c are coaxially arranged. The valve core 30 also includes a connecting column, which is disposed at the end of the sliding column 302 away from the control rod 303. The diameter of the connecting column is smaller than that of the sliding column 302 to form a step 301. An elastic element 70 is sleeved on the connecting column. A sealing element may be provided on the sliding column 302.

[0030] like Figure 1 and 2 As shown, this utility model proposes a high-pressure valve with overpressure relief function, wherein the diameter of the air passage 201c is the same as the diameter of the control rod 303. Wherein, if the radius of the valve core 30 is r, the friction force of the valve core seal 120 is f, the elastic coefficient of the elastomer 70 is K, the pre-compression amount is x, and the maximum allowable pressure for overpressure relief is P, then the formula can be obtained:

[0031] Kx+f≤3.14×r 2 ×P

[0032] The valve core compresses the elastomer to release pressure and stabilize the medium pressure within the allowable value only when the medium pressure exceeds the allowable value.

[0033] like Figure 1 and 2 As shown, this utility model proposes a high-pressure valve with overpressure relief function. The drive kit 60 further includes a drive seat 602, which is fixedly connected to the output end of the motor 50. The drive seat 602 is also threadedly connected to the valve core conversion seat 601. The drive seat 602 is connected to the output end of the motor 50 via a locating pin.

[0034] like Figure 1 and 2 As shown, the present invention proposes a high-pressure valve with overpressure relief function. The main body 20 is provided with an installation groove 202a. A sensor baffle 90 is provided in the installation groove 202a. The sensor baffle 90 is fixedly connected to the valve core conversion seat 601, and the width of the sensor baffle 90 is the same as the width of the installation groove 202a, so as to restrict the rotation of the valve core conversion seat 601.

[0035] like Figure 1 and 2 As shown, this utility model proposes a high-pressure valve with overpressure relief function. A sensor 110 is provided on one or both sides of the mounting groove 202a, and the sensor 110 is fixedly connected to the main body 20. The sensor 110 is a position sensor, used to determine the moving distance of the valve core conversion seat 601 by sensing the position of the sensor baffle 90.

[0036] like Figure 1 and 2 As shown, this utility model proposes a high-pressure valve with overpressure relief function. A valve core seal 120 is also provided at one end of the air outlet channel 201a near the main body 20. The valve core seal 120 has a connecting hole that connects the air inlet channel 101 and the air passage 201c.

[0037] The working principle of this utility model is as follows:

[0038] a) When active pressure relief is required;

[0039] b) The geared motor rotates, driving the drive seat to rotate, thereby causing the valve core conversion seat to move downward;

[0040] c) When the limit bolt is forced, the valve core moves downward and the control rod moves downward, so that the connection between the air outlet and the air passage is not blocked by the control rod.

[0041] d) The gas inside the container passes through the inlet and outlet channels and then exits through the outlet channel to relieve pressure.

[0042] e) When the overpressure relief function is required;

[0043] f) The geared motor rotates, causing the drive seat to rotate, which in turn moves the valve core conversion seat upward;

[0044] g) When the control lever is not in contact with the valve core seal, the valve core and valve core connecting seat move upward together due to the action of the elastic element;

[0045] h) When the control lever contacts the valve core seal, the air passage is blocked;

[0046] i) As the valve core connecting seat continues to move upward, the elastic element is forced to compress until the sensor detects that the sensor baffle has reached the designated position and then stops.

[0047] j) At this time, the valve core will only be forced to move downward when the force exerted by the gas pressure on the end of the control rod is greater than the elastic force generated after the elastic body is deformed, so that the air passage is unobstructed and overpressure relief is achieved.

[0048] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A high-pressure valve with overpressure relief function, comprising a base (10), a body (20), and a valve core (30), wherein one end of the body (20) is fixedly connected to the base (10), the valve core (30) is slidably disposed within the body (20), an air inlet channel (101) is provided within the base (10), and an air outlet channel (201a) is provided within the body (20), wherein the valve core (30) switches the on / off state of the air inlet channel (101) and the air outlet channel (201a) by moving up and down, characterized in that: It also includes a valve cover (40), a motor (50), a drive assembly (60), and an elastic element (70). The valve cover (40) is fixedly mounted on the end of the main body (20) away from the base (10). The motor (50) is fixedly mounted on the valve cover (40), and the output end of the motor (50) extends through the valve cover (40) into the main body (20). The output end of the motor (50) is connected to the drive assembly (60). The system includes a valve core conversion seat (601), which is slidably disposed within the main body (20). The valve core conversion seat (601) is provided with a mounting hole (601a). A limiting bolt (80) is fixed after the valve core (30) passes through the mounting hole (601a). A step (301) is also provided on the valve core (30). One end of the elastic element (70) contacts the step (301), and the other end contacts the valve core conversion seat (601).

2. A high-pressure valve with overpressure relief function according to claim 1, characterized in that: The main body (20) includes a valve seat (201) and a valve body (202). One end of the valve seat (201) is connected to the base (10), and the other end is fixedly connected to the valve body (202). The air outlet channel (201a) is disposed on the valve seat (201).

3. A high-pressure valve with overpressure relief function according to claim 2, characterized in that: The valve seat (201) is provided with a sliding hole (201b) and an air passage (201c). One end of the air passage (201c) is connected to the air inlet passage (101), and the other end is connected to the sliding hole (201b). The air outlet passage (201a) is connected to the side of the air passage (201c). The valve core (30) includes a sliding column (302) and a control rod (303) fixed together. The sliding column (302) is slidably disposed in the sliding hole (201b), and the control rod (303) is disposed in the air passage (201c).

4. A high-pressure valve with overpressure relief function according to claim 3, characterized in that: The diameter of the airway (201c) is the same as the diameter of the control rod (303).

5. A high-pressure valve with overpressure relief function according to claim 1 or 2, characterized in that: The drive kit (60) also includes a drive seat (602), which is fixedly connected to the output end of the motor (50) and threadedly connected to the valve core conversion seat (601).

6. A high-pressure valve with overpressure relief function according to claim 5, characterized in that: The main body (20) is provided with an installation groove (202a), and a sensor baffle (90) is provided in the installation groove (202a). The sensor baffle (90) is fixedly connected to the valve core conversion seat (601), and the width of the sensor baffle (90) is the same as the width of the installation groove (202a) to restrict the rotation of the valve core conversion seat (601).

7. A high-pressure valve with overpressure relief function according to claim 6, characterized in that: Sensors (110) are provided on one or both sides of the mounting groove (202a), and the sensors (110) are fixedly connected to the main body (20).

8. A high-pressure valve with overpressure relief function according to claim 1 or 2, characterized in that: A valve core seal (120) is also provided at one end of the air outlet channel (201a) near the main body (20).

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