Pressure self-adaptive adjusting device of pressure control valve

Abstract

The utility model provides a pressure self-adaptive adjusting device of a pressure control valve, which relates to the technical field of pressure control valves and comprises a valve body, pipelines are arranged on two sides of the valve body, a mounting seat is arranged at the top of the valve body, an adjusting column is arranged on the top surface of the mounting seat, support rods are arranged on two sides of the adjusting column, a top frame is arranged on the top surfaces of the two support rods, and an adjusting seat is arranged outside the adjusting column. A rotating groove is formed in the outer surface of the top end of the adjusting seat, a moving seat is arranged at the top of the adjusting column, the main spring and the auxiliary spring are extruded through the extrusion seat and the mounting plate on the outer surface of the extrusion seat respectively, and due to the fact that the main spring and the auxiliary spring are different springs, the auxiliary spring works firstly to provide small elastic force in the low-pressure stage; after the pressure rises to a certain degree, the main spring begins to work to increase the elastic force, so that the adjustment of the valve is more sensitive, the pressure adjusting precision is higher, the whole pressure adjusting valve does not need to be disassembled in the whole installation process, and the defect that the spring cannot be additionally arranged under the condition that the pressure adjusting valve is not disassembled is overcome.

Description

Technical Field

[0001] This utility model relates to the field of pressure control valve technology, and in particular to a pressure adaptive adjustment device for a pressure control valve. Background Technology

[0002] According to a self-operated pressure regulating valve disclosed in Chinese Publication No. CN220102073U, it includes a valve body, a valve core, and a valve stem connected to the valve core. A detection actuator is connected to the top of the valve body, and a condenser is connected to the top of the detection actuator. The other end of the condenser is connected to the valve body through a connecting pipe. This improves upon the traditional method of placing the condenser on one side of the valve by placing it on the top of the detection actuator. This avoids the excessive environmental requirements of the inverted installation method. Furthermore, placing it on the top allows the cooled steam to enter the diaphragm of the detection actuator by gravity. This allows for flexible adaptation to various environments, avoids installation limitations due to size constraints, and increases the valve's application range and practicality in various environments.

[0003] The aforementioned technologies and traditional self-operated pressure regulating valves typically use springs for pressure regulation. However, since the number of springs on the pressure regulating valve is fixed during installation, and due to the inherent characteristics of the springs and factors such as pressure fluctuations in the medium under complex operating conditions, achieving high-precision pressure control is difficult. Therefore, changing the spring settings often requires removing the entire pressure regulating valve from the piping system, undergoing a complex disassembly process before the springs can be replaced or adjusted. It is impossible to add springs without disassembling the pressure regulating valve. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies that cannot add springs without disassembling the pressure regulating valve, and to propose a pressure adaptive adjustment device for a pressure control valve.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a pressure adaptive adjustment device for a pressure control valve, comprising a valve body, pipes on both sides of the valve body, a mounting base on the top of the valve body, an adjusting column on the top surface of the mounting base, support rods on both sides of the adjusting column, a top bracket on the top surface of the two support rods, an adjusting seat on the outside of the adjusting column, a rotating groove on the outer surface of the top of the adjusting seat, a movable seat on the top of the adjusting column, a pressing seat on the top of the movable seat, and four locking blocks arranged in a circular array on the outer circumference of the movable seat, with one side of each of the four locking blocks... The device is equipped with mounting plates, and four mounting plates are also provided on the outside of the extrusion seat. A main spring is provided on the top of the movable seat. A secondary spring is provided in the middle of the four mounting plates on the outer surface of the movable seat and the four mounting plates on the outer surface of the extrusion seat. Two guide blocks are provided on the top surface of the movable seat. A lower membrane cover is provided on the top surface of the top frame. An upper membrane cover is provided on the top of the lower membrane cover. A diaphragm is provided in the middle of the upper membrane cover and the lower membrane cover. A guide tube is provided on one side of the valve body. An extrusion plate is provided at the bottom of the diaphragm. A valve stem is provided on the bottom surface of the extrusion plate. A valve core is provided on the bottom surface of the valve stem. A guide rod is provided in the middle of the four secondary springs.

[0006] Preferably, the two pipes are connected to the valve body flange, the mounting base is installed on the top surface of the valve body, and the valve body is connected to the mounting base flange. The valve body and the adjusting column are integrally formed, and the two support rods are mirror images of the adjusting column, and the support rods are welded to the mounting base.

[0007] Preferably, the adjusting column passes through the adjusting seat, and the adjusting seat is threadedly connected to the adjusting column. The movable seat is installed on the top surface of the adjusting seat, and the adjusting column passes through the movable seat. The two guide blocks are mirror images of the adjusting seat, and both support rods pass through the guide blocks.

[0008] Preferably, the four locking blocks are welded to the movable seat, and one end of the locking block is installed into the rotating groove of the adjusting seat. The four mounting plates are arranged in a circumferential array on the outer surface of the movable seat, and the mounting plates are welded to the movable seat.

[0009] Preferably, the extrusion seat and the movable seat are perpendicular to each other, and the four mounting plates are arranged in a circumferential array on the outer surface of the extrusion seat, and the positions of the mounting plates on the outer surface of the extrusion seat correspond one-to-one with the positions of the mounting plates on the outer surface of the movable seat.

[0010] Preferably, the main spring is installed between the movable seat and the extrusion seat, the four guide rods all pass through the mounting plates of the extrusion seat and the movable seat, and the four guide rods all pass through the secondary spring between the two mounting plates, and the top frame is installed on the top surface of the two support rods.

[0011] Preferably, the lower membrane cover is installed on the top surface of the top frame and bolted to the top frame. The extrusion plate is installed inside the lower membrane cover. The extrusion plate is welded to the valve stem on the bottom surface of the extrusion plate. The valve stem passes through the lower membrane cover, the top frame, the extrusion seat, the adjusting column, the mounting seat, and into the interior of the valve body. The valve core is threaded to the valve stem that passes into the interior of the valve body. The upper membrane cover is installed on the top of the diaphragm and bolted to both the upper membrane cover and the diaphragm. One end of the guide tube is installed into the top surface of the upper membrane cover, and the other end of the guide tube is installed into a pipe on one side of the valve body.

[0012] Beneficial effects

[0013] In this invention, when improved pressure regulation accuracy is required, the auxiliary spring is installed between the mounting plate of the movable seat and the mounting plate of the extrusion seat. After installation, the guide rod passes through the two mounting plates and the auxiliary spring, and nuts are installed at both ends of the guide rod to fix the auxiliary spring between the two mounting plates, thus completing the installation of the auxiliary spring. After installation, gas enters the upper diaphragm cover from the guide tube, increasing the pressure inside the diaphragm cover and causing the medium pressure to act on the diaphragm, causing the diaphragm to deform downwards and compress the extrusion plate. The extrusion plate then drives the valve stem to move downwards. Since the extrusion seat is welded to the valve stem, the extrusion seat also moves downwards when the valve stem moves downwards. The extrusion seat and the mounting plate on its outer surface extrude pressure on the main spring and the auxiliary spring, respectively. Because the main spring and the auxiliary spring are different springs, the auxiliary spring takes effect first at low pressure, providing a smaller elastic force. After the pressure rises to a certain level, the main spring begins to work, increasing the elastic force, thereby making the valve regulation more sensitive and the pressure regulation accuracy higher. The entire installation process does not require disassembling the entire pressure regulating valve, solving the disadvantage of not being able to add springs without disassembling the pressure regulating valve. Attached Figure Description

[0014] Figure 1 This is an isometric drawing of the present invention;

[0015] Figure 2 This is a perspective view of the present utility model;

[0016] Figure 3 This is a front view of the present invention;

[0017] Figure 4 This is a top view of the present invention;

[0018] Figure 5 For the present utility model Figure 4 Sectional view at point AA.

[0019] Legend:

[0020] 1. Valve body; 2. Pipeline; 3. Mounting seat; 4. Adjusting column; 5. Support rod; 6. Adjusting seat; 7. Rotary groove; 8. Moving seat; 9. Locking block; 10. Mounting plate; 11. Main spring; 12. Secondary spring; 13. Guide block; 14. Top frame; 15. Extrusion seat; 16. Valve stem; 17. Lower diaphragm cover; 18. Upper diaphragm cover; 19. Diaphragm; 20. Guide pipe; 21. Extrusion plate; 22. Valve core; 23. Guide rod. Detailed Implementation

[0021] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0024] Reference Figure 1-5An adaptive pressure regulating device for a pressure control valve includes a valve body 1, pipes 2 on both sides of the valve body 1, a mounting base 3 on the top of the valve body 1, an adjusting column 4 on the top surface of the mounting base 3, support rods 5 on both sides of the adjusting column 4, a top bracket 14 on the top surface of the two support rods 5, an adjusting seat 6 on the outside of the adjusting column 4, a rotating groove 7 on the outer surface of the top of the adjusting seat 6, a movable seat 8 on the top of the movable seat 8, a pressing seat 15 on the top of the movable seat 8, four locking blocks 9 arranged in a circular array on the outside of the movable seat 8, a mounting plate 10 on one side of each of the four locking blocks 9, and four mounting plates 10 also arranged on the outside of the pressing seat 15, a main spring 11 on the top of the movable seat 8, and the four mounting plates 10 on the outer surface of the movable seat 8 and the four mounting plates 11 on the outer surface of the pressing seat 15 are connected. Each of the four auxiliary springs 12 is provided in the middle. The top surface of the movable seat 8 is provided with two guide blocks 13. The top surface of the top frame 14 is provided with a lower diaphragm cover 17, and the top of the lower diaphragm cover 17 is provided with an upper diaphragm cover 18. A diaphragm 19 is provided between the upper diaphragm cover 17 and the lower diaphragm cover 18. A guide pipe 20 is provided on one side of the valve body 1. A pressure plate 21 is provided at the bottom of the diaphragm 19. A valve stem 16 is provided on the bottom surface of the pressure plate 21, and a valve core 22 is provided on the bottom surface of the valve stem 16. A guide rod 23 is provided in the middle of each of the four auxiliary springs 12. Two pipes 2 are connected to the flange of the valve body 1. The mounting seat 3 is installed on the top surface of the valve body 1, and the valve body 1 is connected to the flange of the mounting seat 3. The valve body 1 and the adjusting column 4 are integrally formed. Two support rods 5 are mirror images of the adjusting column 4, and the support rods 5 are welded to the mounting seat 3. The adjusting column 4 passes through... The adjusting seat 6 is threadedly connected to the adjusting column 4. The movable seat 8 is installed on the top surface of the adjusting seat 6, and the adjusting column 4 passes through the movable seat 8. Two guide blocks 13 are mirror images of the adjusting seat 6, and two support rods 5 pass through the guide blocks 13. Four locking blocks 9 are welded to the movable seat 8, and one end of the locking blocks 9 is installed into the rotating groove 7 of the adjusting seat 6. Four mounting plates 10 are arranged in a circumferential array on the outer surface of the movable seat 8, and the mounting plates 10 are welded to the movable seat 8. The extrusion seat 15 is perpendicular to the movable seat 8. Four mounting plates 10 are arranged in a circumferential array on the outer surface of the extrusion seat 15, and the positions of the mounting plates 10 on the outer surface of the extrusion seat 15 correspond one-to-one with the positions of the mounting plates 10 on the outer surface of the movable seat 8. The main spring 11 is installed on the movable seat 8 and the extrusion seat 15. In the middle of the pressure seat 15, four guide rods 23 pass through the mounting plate 10 of the extrusion seat 15 and the moving seat 8, and all four guide rods 23 pass through the secondary spring 12 between the two mounting plates 10. The top frame 14 is installed on the top surface of the two support rods 5. The lower membrane cover 17 is installed on the top surface of the top frame 14 and is bolted to the top frame 14. The extrusion plate 21 is installed in the lower membrane cover 17. The extrusion plate 21 is welded to the valve stem 16 on the bottom surface of the extrusion plate 21. The valve stem 16 passes through the lower membrane cover 17, the top frame 14, the extrusion seat 15, the adjusting column 4, the mounting seat 3, and enters the interior of the valve body 1. The valve core 22 is threaded to the valve stem 16 that enters the interior of the valve body 1. The upper membrane cover 18 is installed on the top of the diaphragm 19, and both the upper membrane cover 18 and the diaphragm 19 are bolted to the lower membrane cover 17.One end of the guide tube 20 is installed into the top surface of the upper membrane cover 18, and the other end of the guide tube 20 is installed into the pipe 2 on one side of the valve body 1.

[0025] The valve body 1 is the main structure of the pressure regulating valve, forming an internal fluid channel. It primarily bears the fluid pressure and provides guidance and sealing for the movement of the valve core 22. Flanges on both sides connect to pipes 2, allowing fluid inflow and outflow. Fluid is introduced into the valve body 1 through the inlet pipe 2, and after pressure stabilization by the valve core 22, it flows out through the outlet pipe 2. A mounting base 3 is located on the top of the valve body 1, fixedly connected by a flange, providing a mounting location for the upper regulating mechanism. The regulating column 4 is mounted on the mounting base 3, integrally formed with the valve body 1, and serves as the central axis of the regulating mechanism. Support rods 5 on both sides provide support for the top frame 14, and also pass through guide blocks 13, providing guidance. The regulating seat 6 is threaded onto the regulating column 4; rotating the regulating seat 6 allows it to move axially up and down. A rotating groove 7 is located at the top of the regulating seat 6, engaging with the locking block 9 at the bottom of the moving seat 8. When the adjusting seat 6 rotates, the locking block 9 slides along the rotating groove 7, driving the moving seat 8 to move vertically on the adjusting column 4, thereby adjusting the preload of the main spring 11 and the auxiliary spring 12, and thus setting the target pressure. The main spring 11 and multiple auxiliary springs 12 are connected above the moving seat 8. The auxiliary springs 12 are fixed between the moving seat 8 and the mounting plate 10 on the outer surface of the extrusion seat 15 via guide rods 23, arranged in a circumferential array. The main spring 11 provides the main reaction force, while the auxiliary springs 12 have lower stiffness and are preferentially compressed in the low-pressure stage, thus improving the adjustment sensitivity in the low-pressure section. The guide rod 23 passes through the center of the auxiliary spring 12 and is fixed to the two mounting plates 10, ensuring the stability of the auxiliary spring 12 during operation. To ensure the stability of the moving seat 8's axial movement, a guide block 13 is provided at its top, through which the support rod 5 passes, limiting lateral sway. The top frame 14 is mounted on the top of the support rod 5, providing an installation platform for the diaphragm 19 assembly. The compression seat 15 is located above the movable seat 8, contacting the lower ends of the main spring 11 and the auxiliary spring 12, and is welded to the valve stem 16, bearing the force transmitted downward by the movement of the diaphragm 19. The valve stem 16 passes through the compression seat 15 and connects downward to the valve core 22, transmitting the movement of the diaphragm 19 upward and the action of the valve core 22 downward, ensuring continuous and accurate adjustment. The lower diaphragm cover 17 and the upper diaphragm cover 18 are installed on the top frame 14, with the diaphragm 19 sandwiched in between, forming a sealed feedback chamber. The guide pipe 20 is connected to the upper diaphragm cover 18, introducing the pressure from the pipe 2 at the outlet end of the valve body 1 into the upper surface of the diaphragm 19. The diaphragm 19, as a sealing element, senses pressure changes and deforms accordingly. The deformation of the diaphragm 19 is transmitted to the valve stem 16 through the internal compression plate 21, driving the valve core 22 to adjust its displacement. The valve core 22 is located in the internal flow channel of the valve body 1 and achieves axial movement through connection with the valve stem 16. When the diaphragm 19 senses a pressure change, it drives the valve stem 16 and valve core 22 to move up and down, thereby adjusting the flow channel opening, controlling the fluid flow through the valve, and ultimately stabilizing the pressure in the pipeline 2. Specific Implementation Example 2:

[0027] Reference Figure 1-5 A pressure adaptive regulating device for a pressure control valve, further based on the basic structure in Specific Embodiment 1, allows the pressure on the outlet side of the valve body 1 to be introduced to the top of the upper diaphragm cover 18 through the guide pipe 20 during operation, and acting on the upper surface of the diaphragm 19. The pressure on the diaphragm 19 is balanced by the reaction forces provided by the main spring 11 and the auxiliary spring 12 below, as well as the elastic force of the diaphragm 19 itself. When the pressure in the pipeline 2 increases, the force acting on the diaphragm 19 increases, overcoming the spring force and causing the diaphragm 19 to deform downwards. This causes the squeezing plate 21, valve stem 16, and valve core 22 to move downwards, reducing the flow area of ​​the valve body 1, thereby reducing the pressure in the pipeline 2. When the pressure in the pipeline 2 decreases, the force acting on the diaphragm 19 decreases, and the reaction force of the spring pushes the diaphragm 19 upwards, causing the valve stem 16 and valve core 22 to move upwards, increasing the flow area of ​​the valve, thereby increasing the pressure in the pipeline 2. During use, rotating the adjusting seat 6 changes the vertical position of the moving seat 8, thereby adjusting the preload of the main spring 11 and the auxiliary spring 12 to adjust the outlet set pressure. When higher pressure regulation accuracy is required, the auxiliary spring 12 is installed. Because the auxiliary spring 12 has lower stiffness, it functions first during low-pressure changes, allowing the valve to respond to smaller pressure fluctuations and improving the regulation sensitivity in the low-pressure range. As the pressure increases further, the main spring 11 also begins to participate, providing a greater reaction force to ensure stable regulation in the high-pressure range.

[0028] In summary:

[0029] 1. When higher pressure regulation accuracy is required, install the auxiliary spring 12 between the mounting plate 10 of the movable seat 8 and the mounting plate 10 of the extrusion seat 15. After installation, insert the guide rod 23 through the two mounting plates 10 and the auxiliary spring 12, and install nuts at both ends of the guide rod 23 to fix the auxiliary spring 12 between the two mounting plates 10. After installation, gas enters the upper diaphragm cover 18 from the guide pipe 20, increasing the pressure inside the diaphragm cover and causing the medium pressure to act on the diaphragm 19, causing the diaphragm 19 to deform downwards and compress the extrusion plate 21. The extrusion plate 21 then moves the valve stem 16 downwards. Due to the pressure regulation accuracy of the extrusion seat 1... 5 is welded to the valve stem 16, so that when the valve stem 16 moves downward, the compression seat 15 also moves downward. The compression seat 15 and the mounting plate 10 on the outer surface of the compression seat 15 respectively compress the main spring 11 and the auxiliary spring 12. Since the main spring 11 and the auxiliary spring 12 are different springs, the auxiliary spring 12 works first in the low pressure stage, providing a smaller elastic force; after the pressure rises to a certain level, the main spring 11 begins to work, increasing the elastic force, thereby making the valve adjustment more sensitive and the pressure regulation accuracy higher. The entire installation process does not require the entire pressure regulating valve to be disassembled, which solves the disadvantage of not being able to add springs without disassembling the pressure regulating valve.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure self-adapting regulating device of a pressure control valve, comprising a valve body (1), characterized in that: Both sides of the valve body (1) are provided with pipes (2), the top of the valve body (1) is provided with a mounting seat (3), the top surface of the mounting seat (3) is provided with an adjusting column (4), both sides of the adjusting column (4) are provided with supporting rods (5), the top surface of the two supporting rods (5) is provided with a top frame (14), the outside of the adjusting column (4) is provided with an adjusting seat (6), the outer surface of the top end of the adjusting seat (6) is provided with a rotating groove (7), the top of the adjusting column (4) is provided with a moving seat (8), the top of the moving seat (8) is provided with a extrusion seat (15), the outside circumferential array of the moving seat (8) is provided with four clamping blocks (9), one side of the four clamping blocks (9) is provided with a mounting plate (10), and the outside of the extrusion seat (15) is also provided with four mounting plates (10), the top of the moving seat (8) is provided with a main spring (11), the middle of the four mounting plates (10) on the outer surface of the moving seat (8) and the four mounting plates (10) on the outer surface of the extrusion seat (15) are provided with a vice spring (12), the top surface of the moving seat (8) is provided with two guide blocks (13), the top surface of the top frame (14) is provided with a lower film cover (17), the top of the lower film cover (17) is provided with an upper film cover (18), the middle of the upper film cover (18) and the lower film cover (17) is provided with a diaphragm (19), one side of the valve body (1) is provided with a flow guide pipe (20), the bottom of the diaphragm (19) is provided with an extrusion plate (21), the bottom surface of the extrusion plate (21) is provided with a valve rod (16), the bottom surface of the valve rod (16) is provided with a valve core (22), the middle of the four vice springs (12) is provided with a guide rod (23).

2. The pressure self-adapting regulating device of a pressure control valve according to claim 1, characterized in that: Two pipes (2) are connected with the valve body (1) flange, the mounting seat (3) is installed on the top surface of the valve body (1), and the valve body (1) is connected with the mounting seat (3) flange, the valve body (1) is integrally formed with the adjusting column (4), two supporting rods (5) are mirror image arranged with the adjusting column (4) as the center, and the supporting rod (5) is welded with the mounting seat (3).

3. The pressure self-adapting regulating device of a pressure control valve according to claim 1, characterized in that: The adjusting column (4) penetrates the adjusting seat (6), and the adjusting seat (6) is screwed with the adjusting column (4), the moving seat (8) is installed on the top surface of the adjusting seat (6), and the adjusting column (4) penetrates the moving seat (8), two guide blocks (13) are mirror image arranged with the adjusting seat (6) as the center, and two supporting rods (5) penetrate the guide blocks (13).

4. The pressure self-adapting regulating device of a pressure control valve according to claim 1, characterized in that: Four clamping blocks (9) are welded with the moving seat (8), and one end of the clamping block (9) is installed into the rotating groove (7) of the adjusting seat (6), four mounting plates (10) are circumferentially arranged on the outer surface of the moving seat (8), and the mounting plate (10) is welded with the moving seat (8).

5. The pressure self-adapting regulating device of a pressure control valve according to claim 1, characterized in that: The extrusion seat (15) is perpendicular to the moving seat (8), four mounting plates (10) are circumferentially arranged on the outer surface of the extrusion seat (15), and the positions of the mounting plates (10) on the outer surface of the extrusion seat (15) correspond to the positions of the mounting plates (10) on the outer surface of the moving seat (8).

6. The pressure self-adapting regulating device of a pressure control valve according to claim 1, characterized in that: The main spring (11) is installed between the moving seat (8) and the extruding seat (15), the four guide rods (23) all pass through the installation plate (10) of the extruding seat (15) and the moving seat (8), and the four guide rods (23) all pass through the auxiliary spring (12) between the two installation plates (10), and the top frame (14) is installed on the top surface of the two support rods (5).

7. The pressure self-adapting regulating device of a pressure control valve according to claim 1, characterized in that: The lower membrane cover (17) is installed on the top surface of the top frame (14), and the lower membrane cover (17) is bolted with the top frame (14), the extruding plate (21) is installed in the lower membrane cover (17), the extruding plate (21) is welded with the valve rod (16) on the bottom surface of the extruding plate (21), the valve rod (16) passes through the inside of the valve body (1), the lower membrane cover (17), the top frame (14), the extruding seat (15), the adjusting column (4), the installation seat (3), and the valve core (22) is screwed with the valve rod (16) passing through the inside of the valve body (1), the upper membrane cover (18) is installed on the top of the diaphragm (19), and the upper membrane cover (18) and the diaphragm (19) are bolted with the lower membrane cover (17), one end of the flow guide pipe (20) is installed into the top surface of the upper membrane cover (18), and the other end of the flow guide pipe (20) is installed into the pipeline (2) on one side of the valve body (1).

Images