A ball cage type noise reduction regulating valve

Abstract

The present application discloses a ball cage type noise reduction regulating valve, which relates to the field of valves, and includes a valve body, a valve cover and a valve core. The valve body is provided with an inlet and outlet flow channel, the valve cover is detachably mounted on the valve body, a guide valve cage is provided on the inner side of the valve body, the guide valve cage divides the inlet and outlet flow channel into two sections, the valve core is mounted on the inner side of the guide valve cage, the valve core is connected with a valve stem, the valve stem passes through the valve cover, and a through hole is provided on the peripheral wall of the guide valve cage, and the depth direction of the through hole is relatively inclined with respect to the outer peripheral surface of the guide valve cage. In the present application, during the process of liquid flowing through the guide valve cage, since the depth direction of the through hole is relatively inclined with respect to the outer peripheral surface of the guide valve cage, the liquid is easy to form a swirl flow on the inner side of the guide valve cage, so that the liquid is guided by the inner wall of the guide valve cage, which is conducive to reducing the mutual impact of liquid flow, thereby facilitating reducing the noise during the operation of the regulating valve.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to a ball cage type noise reduction regulating valve. Background Art

[0002] The cage type regulating valve is a pressure balanced regulating valve. The valve adopts a sleeve-guided pilot valve core. It mainly uses the pressure of the fluid to achieve rapid action of the valve core with small operating force. The regulating valve has good dynamic stability and low noise, and is suitable for controlling high pressure difference fluids of various temperatures. It is equipped with a multi-spring diaphragm actuator or an electric actuator, with a compact structure and large output force.

[0003] In the coal chemical industry, petroleum and natural gas, and pressure and heating industries, with the development of technology and the advancement of metallurgical refining processes, high pressure difference and high flow rate conditions appear more and more frequently. Under some working conditions, the medium will be transformed into a gas-liquid mixed two-phase flow, and the cage control valve will generate more obvious noise during operation, which will be transmitted to the outside through the valve body, affecting the surrounding production environment. Summary of the invention

[0004] In order to reduce the noise generated during the operation of a cage-type control valve, the present application provides a ball cage-type noise reduction control valve.

[0005] The present application provides a ball cage type noise reduction regulating valve adopts the following technical solution:

[0006] A ball cage type noise reduction regulating valve comprises a valve body, a valve cover and a valve core, the valve body is provided with inlet and outlet flow channels, the valve cover is detachably mounted on the valve body, a guide valve cage is provided on the inner side of the valve body, the guide valve cage divides the inlet and outlet flow channels into two sections, the valve core is mounted on the inner side of the guide valve cage, the valve core is connected with a valve stem, the valve stem passes through the valve cover, a through hole is provided on the peripheral wall of the guide valve cage, and a depth direction of the through hole is inclined relative to the outer peripheral surface of the guide valve cage.

[0007] By adopting the above technical solution, in the process of conveying liquid medium containing gas, the ball cage type noise reduction regulating valve enters from one end of the inlet and outlet flow channel, and is discharged from the other end of the inlet and outlet flow channel after passing through the guide valve cage. In the process of liquid flowing through the guide valve cage, the through hole serves as a channel for liquid to enter and exit the guide valve cage. Since the depth direction of the through hole is relatively inclined with the outer peripheral surface of the guide valve cage, the liquid is easy to form a swirl with a stable flow direction on the inner side of the guide valve cage, so that the liquid is guided by the inner wall of the guide valve cage, which is conducive to reducing the impact of liquid flow on each other and causing gas vibration, thereby helping to reduce the noise during the operation of the regulating valve.

[0008] Optionally, the inlet and outlet flow channels include a first flow channel, a second flow channel and an installation cavity, the installation cavity is located between the first flow channel and the second flow channel, and the installation cavity is used to install the guide valve cage; the first flow channel is connected to the outer space of the guide valve cage, and the aperture of the through hole gradually increases in the direction away from the port of the first flow channel.

[0009] By adopting the above technical solution, the guide valve cage is installed in the installation cavity, and the outer space of the guide valve cage gradually narrows in the direction away from the port of the first flow channel. By gradually increasing the aperture of the through hole in the direction away from the port of the first flow channel, the resistance change caused by the change of the outer space of the guide valve cage can be balanced to a certain extent, which is conducive to making the flow of liquid through the guide valve cage more balanced.

[0010] Optionally, the guide valve cage includes an inner cylinder wall and an outer cylinder wall, the through hole includes an inner through hole located in the inner cylinder wall and an outer through hole located in the outer cylinder wall, the inner through hole corresponds to the outer through hole one by one, and the inner through hole is aligned with the center line of the corresponding outer through hole.

[0011] By adopting the above technical scheme, noise is easily generated on the inner side of the guide valve cage during the process of liquid flowing through the inlet and outlet channels. When the noise on the inner side of the guide valve cage propagates outward, it passes through the inner through hole and the outer through hole in radial direction successively. The inner cylinder wall and the outer cylinder wall form a double-layer structure. When the through hole depth direction is inclined relative to the outer peripheral surface of the guide valve cage, the center line of the inner through hole located in the inner cylinder wall is aligned with the center line of the outer through hole located in the outer cylinder wall, so that the inner through hole and the outer through hole are staggered at a certain distance along the circumferential direction of the guide valve cage, so that the inner cylinder wall and the outer cylinder wall jointly form a resistance and noise reduction effect on the noise on the inner side of the guide valve cage.

[0012] Optionally, an annular end plate is provided at one end of the outer cylinder wall close to the valve cover, and the annular end plate connects the outer cylinder wall and the inner cylinder wall at the same time, and the end of the outer cylinder wall away from the annular end plate is kept separated from the inner cylinder wall.

[0013] By adopting the above technical solution, when the regulating valve is installed, the valve cover is usually facing upward, and the gap between the outer cylinder wall and the inner cylinder wall remains open at the end away from the valve cover, so that part of the liquid can directly enter and exit the gap between the outer cylinder wall and the inner cylinder wall, which is beneficial to improving the efficiency of liquid entering and exiting the guide valve cage.

[0014] Optionally, a helical compression spring is provided between the outer cylinder wall and the inner cylinder wall, the helical compression spring abuts against the outer cylinder wall and the inner cylinder wall at the same time, the helical compression spring extends along the circumference of the guide valve cage, and both ends of the helical compression spring are connected to each other.

[0015] By adopting the above technical solution, the helical compression spring located between the outer cylinder wall and the inner cylinder wall forms a supporting effect between the outer cylinder wall and the inner cylinder wall equivalent to a steel wire skeleton, which is beneficial to keep the relative position between the outer cylinder wall and the inner cylinder wall stable, thereby keeping the structure of the guide valve cage stable.

[0016] Optionally, the guide valve cage includes an inner cylinder wall and an outer cylinder wall, and the through hole includes an inner through hole located in the inner cylinder wall and an outer through hole located in the outer cylinder wall, and the inner through hole and the outer through hole are arranged in a one-to-one correspondence; the inner through hole and the outer through hole are both bridge-type holes, the hole wall of the inner through hole protrudes toward the outer cylinder wall, the hole wall of the outer through hole protrudes toward the inner cylinder wall, and the orifice of the inner through hole is opposite to the orifice of the corresponding outer through hole.

[0017] By adopting the above technical solution, the inner through hole and the outer through hole are set as bridge-type holes, and the inner cylinder wall and the outer cylinder wall can have a smaller wall thickness, so that the inner through hole and the outer through hole have a larger guide surface size.

[0018] Optionally, the inner circumferential surface of the inner cylinder wall is provided with a polytetrafluoroethylene lining layer, and the polytetrafluoroethylene lining layer is provided with avoidance holes, and the avoidance holes are arranged in a one-to-one correspondence with the inner through holes.

[0019] By adopting the above technical solution, by arranging a polytetrafluoroethylene lining layer on the inner circumferential surface of the inner cylinder wall, the valve core and the guide valve cage can be kept in as close contact as possible while making the contact between the valve core and the guide valve cage softer, thereby reducing the jamming of the valve core during the movement of the valve core relative to the guide valve cage.

[0020] Optionally, the inlet and outlet flow channels include a first flow channel, a second flow channel and an installation cavity, the installation cavity is located between the first flow channel and the second flow channel, the installation cavity is used to install the guide valve cage, the center line of the first flow channel and the center line of the second flow channel are parallel to each other, and the center of the installation cavity is located between the center line of the first flow channel and the center line of the second flow channel.

[0021] By adopting the above technical solution, the center line of the first flow channel and the center line of the second flow channel deviate from the center of the guide valve cage, which helps to form a vortex on the inner side of the guide valve cage during the process of liquid entering and exiting the guide valve cage, and helps to reduce the resistance of the liquid during the process of liquid entering and exiting the guide valve cage.

[0022] Optionally, the valve core is a cylindrical structure, the end wall of the valve core is fixedly connected to the valve stem, and the peripheral wall of the valve core is adapted to the inner peripheral surface of the guide valve cage; the end wall of the valve core is provided with a connecting hole, and the end wall of the valve core is provided with a sound absorbing component; the sound absorbing component includes a substrate, which is fixedly connected to the valve core, and a fin group is fixedly provided on a side of the substrate away from the valve core, and the fins of the fin group are arranged side by side and spaced apart, and slit gaps are formed between adjacent fins.

[0023] By adopting the above technical solution, the noise generated in the guide valve cage can enter the space between the valve core and the valve cover through the connecting hole. After the noise enters between the valve core and the valve cover, it is silenced by the fin group, which is conducive to reducing noise.

[0024] Optionally, the valve core is provided with a guide paddle, the guide paddle is provided with a rotating shaft, and the guide paddle is rotatably connected to the valve core via the rotating shaft.

[0025] By adopting the above technical solution, the liquid contacts the guide paddle after entering the guide valve cage. The blades of the guide paddle can disturb the liquid and reduce the formation of bubbles in the liquid flow. The guide paddle can rotate under the impetus of the water flow, which is beneficial to reducing the resistance of the guide paddle to the liquid flow.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] When the liquid flows through the guide valve cage, the through hole serves as a channel for the liquid to enter and exit the guide valve cage. Since the depth direction of the through hole is relatively inclined with the outer peripheral surface of the guide valve cage, the liquid can easily form a vortex with a stable flow direction on the inner side of the guide valve cage, so that the liquid is guided by the inner wall of the guide valve cage, which is beneficial to reduce the mutual impact of liquid flow and the occurrence of gas vibration, thereby helping to reduce the noise during the operation of the regulating valve.

[0028] The inner cylinder wall and the outer cylinder wall form a double-layer structure, and the center line of the inner through hole located in the inner cylinder wall is aligned with the center line of the outer through hole located in the outer cylinder wall, so that the inner through hole and the outer through hole are staggered at a certain distance along the circumferential direction of the guide valve cage, so that the inner cylinder wall and the outer cylinder wall jointly form a resistance and noise reduction effect on the noise inside the guide valve cage.

[0029] The center line of the first flow channel and the center line of the second flow channel deviate from the center of the guide valve cage, which helps to form a swirl flow inside the guide valve cage when the liquid enters and exits the guide valve cage, and helps to reduce the resistance of the liquid in the process of entering and exiting the guide valve cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0031] Figure 2 Schematic diagram of a cross section of a guide valve cage of Example 1.

[0032] Figure 3 It is a schematic diagram of the overall structure of Example 2.

[0033] Figure 4 Schematic diagram of a cross section of a guide valve cage of Example 3.

[0034] Figure 5 It is a schematic diagram used to reflect the positional relationship between the first flow channel and the second flow channel in Example 4.

[0035] Description of reference numerals:

[0036] 1. Valve body; 11. Inlet and outlet channels; 111. First channel; 112. Second channel; 113. Installation cavity; 114. Installation port; 2. Valve cover; 3. Valve core; 4. Guide valve cage; 41. Inner cylinder wall; 42. Outer cylinder wall; 43. Through hole; 431. Inner through hole; 432. Outer through hole; 44. Annular end plate; 45. Polytetrafluoroethylene lining layer; 451. Avoidance hole; 5. Valve stem; 6. Helical compression spring; 7. Sound absorbing component; 71. Base plate; 72. Fin group; 8. Guide paddle; 81. Rotating shaft. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-5 This application is described in further detail. Example 1

[0038] The embodiment of the present application discloses a ball cage type noise reduction regulating valve. Figure 1 The ball cage type noise reduction regulating valve comprises a valve body 1, a valve cover 2 and a valve core 3. The valve body 1 is provided with an inlet and outlet flow channel 11. The valve body 1 is provided with a mounting port 114. The mounting port 114 is communicated with the inlet and outlet flow channel 11. The valve cover 2 is detachably mounted on the mounting port 114 of the valve body 1 by bolts. A guide valve cage 4 is provided on the inner side of the valve body 1. The guide valve cage 4 divides the inlet and outlet flow channel 11 of the valve body 1 into two sections.

[0039] The valve core 3 is installed on the inner side of the guide valve cage 4. The valve core 3 is a cylindrical structure. The peripheral wall of the valve core 3 is adapted to the inner peripheral surface of the guide valve cage 4. The end wall of the valve core 3 is fixedly connected with a valve stem 5. The valve stem 5 passes through the valve cover 2. The valve stem 5 is used to connect a pneumatic or electric actuator, or the valve stem 5 can also be driven manually. The peripheral wall of the guide valve cage 4 is provided with a through hole 43. The depth direction of the through hole 43 is relatively inclined to the outer peripheral surface of the guide valve cage 4, that is, the center line of the through hole 43 is eccentrically perpendicular to the center line of the guide valve cage 4, and the inclination direction and inclination angle of each through hole 43 relative to the peripheral wall of the guide valve cage 4 remain constant.

[0040] When the ball cage type lifting regulating valve conveys liquid, the liquid enters and exits the guide valve cage 4 through the through hole 43. Since the depth direction of the through hole 43 is relatively inclined with the outer peripheral surface of the guide valve cage 4, the liquid can form a swirl flow inside the guide valve cage 4. The liquid is guided by the inner wall of the guide valve cage 4, which is conducive to reducing the mutual impact between the liquid flows and thus reducing the generation of noise.

[0041] Reference Figure 1 The inlet and outlet flow channel 11 includes a first flow channel 111, a second flow channel 112 and an installation cavity 113. The installation cavity 113 is located between the first flow channel 111 and the second flow channel 112. The installation cavity 113 is used to install the pilot valve cage 4. The second flow channel 112 is communicated with the inner space of the pilot valve cage 4. The first flow channel 111 is communicated with the outer space of the pilot valve cage 4. The outer space of the pilot valve cage 4 gradually narrows in the direction away from the port of the first flow channel 111. The aperture of the through hole 43 gradually increases in the direction away from the port of the first flow channel 111 to balance the influence of the size change of the outer space of the pilot valve cage 4 on the balance of the liquid flow.

[0042] Reference Figure 1 and Figure 2 The guide valve cage 4 includes an inner cylinder wall 41 and an outer cylinder wall 42, wherein the outer circumferential surface of the outer cylinder wall 42 is set to a spherical arc surface, and the through hole 43 includes an inner through hole 431 located in the inner cylinder wall 41 and an outer through hole 432 located in the outer cylinder wall 42, the inner through hole 431 corresponds to the outer through hole 432 one by one, and the center line of the inner through hole 431 is aligned with the corresponding outer through hole 432. When the through hole 43 is inclined relative to the outer circumferential surface of the guide valve cage 4, the inner through hole 431 and the outer through hole can be staggered at a certain distance along the circumferential direction of the guide valve cage 4, so that the noise generated on the inner side of the guide valve cage 4 is not easy to pass through the outer through hole 432 after passing through the inner through hole 431 in the radial direction, so that the noise reduction effect of the guide valve cage 4 is improved.

[0043] Reference Figure 1 The guide valve cage 4 is made of metal materials such as stainless steel or copper alloy. An annular end plate 44 is provided at one end of the outer cylinder wall 42 of the guide valve cage 4 close to the valve cover 2. The annular end plate 44 is welded and fixed to the outer cylinder wall 42 and the inner cylinder wall 41 respectively. The end of the outer cylinder wall 42 away from the annular end plate 44 is kept separated from the inner cylinder wall 41. The end of the gap between the outer cylinder wall 42 and the inner cylinder wall 41 away from the annular end plate 44 is open, so that part of the liquid can directly enter and exit the gap between the outer cylinder wall 42 and the inner cylinder wall 41, which is conducive to improving the water passing efficiency of the guide valve cage 4.

[0044] A helical compression spring 6 is provided between the outer cylinder wall 42 and the inner cylinder wall 41. The helical compression spring 6 abuts against the outer cylinder wall 42 and the inner cylinder wall 41 at the same time. The helical compression spring 6 extends along the circumferential direction of the guide valve cage 4. Both ends of the helical compression spring 6 are connected to each other. The helical compression spring 6 is respectively connected and fixed to the outer cylinder wall 42 and the inner cylinder wall 41 by spot welding.

[0045] The helical compression spring 6 forms a support function close to a skeleton between the outer cylinder wall 42 and the inner cylinder wall 41 , which is beneficial to keep the structure of the guide valve cage 4 stable.

[0046] The implementation principle of a ball cage type noise reduction regulating valve in the embodiment of the present application is as follows: in the process of conveying a liquid medium containing gas, the liquid enters from one end of the inlet and outlet flow channel 11, and is discharged from the other end of the inlet and outlet flow channel 11 after passing through the guide valve cage 4. In the process of the liquid flowing through the guide valve cage 4, the through hole 43 serves as a passage for the liquid to enter and exit the guide valve cage 4. Since the depth direction of the through hole 43 is relatively inclined to the outer peripheral surface of the guide valve cage 4, the liquid is easy to form a vortex with a stable flow direction on the inner side of the guide valve cage 4, so that the liquid is guided by the inner wall of the guide valve cage 4, which is conducive to reducing the mutual impact of liquid flows and causing gas vibration, thereby helping to reduce the noise during the operation of the regulating valve. Example 2

[0047] Reference Figure 3 The difference between this embodiment and embodiment 1 is that a connecting hole 43 is provided on the end wall of the valve core 3, and a sound absorbing member 7 is provided on the end wall of the valve core 3, and the sound absorbing member 7 is located between the valve core 3 and the valve cover 2; the sound absorbing member 7 includes a substrate 71, and the substrate 71 is an annular structure, and the substrate 71 surrounds the valve stem 5, and the substrate 71 is fixedly connected to the end wall of the valve core 3, and a fin group 72 is fixedly provided on the side of the substrate 71 away from the valve core 3, and the fins of the fin group 72 are arranged side by side and spaced apart, and slit gaps are formed between adjacent fins, and the distribution range of the fin group 72 covers the connecting hole 43.

[0048] The noise generated in the guide cage 4 enters between the valve core 3 and the valve cover 2 from the communicating hole 43 , and the fin group 72 of the sound absorbing member 7 can absorb the noise entering between the valve core 3 and the valve cover 2 .

[0049] The valve core 3 in this embodiment is provided with a guide paddle 8, and the guide paddle 8 is provided with a rotating shaft 81, and the rotating shaft 81 is fixedly connected to the end plate of the valve core 3, and the guide paddle 8 is rotatably connected to the valve core 3 through the rotating shaft 81. The blades of the guide paddle 8 can disturb the liquid and reduce the formation of bubbles in the liquid flow. The guide paddle 8 can rotate with the liquid flow and is not easy to form resistance to the flow of the liquid. Example 3

[0050] Reference Figure 4 The difference between this embodiment and embodiment 1 is that the through hole 43 and the outer through hole 432 in this embodiment are both bridge-type holes, the hole wall of the inner through hole 431 protrudes toward the outer cylinder wall 42, the hole wall of the outer through hole 432 protrudes toward the inner cylinder wall 41, and the opening of the inner through hole 431 is opposite to the corresponding opening of the outer through hole 432.

[0051] The inner through hole 431 and the outer through hole 432 are configured as bridge-type holes, which can reduce the requirements for the wall thickness of the inner cylinder wall 41 and the outer cylinder wall 42 while providing the inner through hole 431 and the outer through hole 432 with a larger guide surface size, and the bridge-type holes have a stronger noise reduction effect than conventional through holes 43.

[0052] The inner circumferential surface of the inner cylinder wall 41 is provided with a polytetrafluoroethylene lining layer 45, and the polytetrafluoroethylene lining layer 45 is provided with avoidance holes 451, and the avoidance holes 451 are arranged one by one corresponding to the inner through holes 431. The polytetrafluoroethylene lining layer 45 can make the valve core 3 and the guide valve cage 4 keep the contact as close as possible, and at the same time make the contact between the valve core 3 and the guide valve cage 4 relatively soft, thereby reducing the jamming of the valve core 3 in the process of moving relative to the guide valve cage 4. Example 4

[0053] Reference Figure 5 In this embodiment, the center of the mounting cavity 113 is located between the center line of the first flow channel 111 and the center line of the second flow channel 112. The center line of the first flow channel 111 and the center line of the second flow channel 112 deviate from the center of the guide valve cage 4, which helps to form a swirl flow inside the guide valve cage 4 during the process of liquid entering and exiting the guide valve cage 4, and helps to reduce the resistance of the liquid entering and exiting the guide valve cage 4.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ball cage type noise reduction regulating valve, characterized in that: The invention comprises a valve body (1), a valve cover (2) and a valve core (3), wherein the valve body (1) is provided with an inlet and outlet flow channel (11), the valve cover (2) is detachably mounted on the valve body (1), a guide valve cage (4) is provided on the inner side of the valve body (1), the guide valve cage (4) divides the inlet and outlet flow channel (11) into two sections, the valve core (3) is mounted on the inner side of the guide valve cage (4), the valve core (3) is connected with a valve stem (5), the valve stem (5) passes through the valve cover (2), a through hole (43) is provided on the peripheral wall of the guide valve cage (4), and the depth direction of the through hole (43) is inclined relative to the outer peripheral surface of the guide valve cage (4); The guide valve cage (4) comprises an inner cylinder wall (41) and an outer cylinder wall (42); the through hole (43) comprises an inner through hole (431) located in the inner cylinder wall (41) and an outer through hole (432) located in the outer cylinder wall (42); the inner through hole (431) corresponds to the outer through hole (432) one by one, and the center line of the inner through hole (431) is aligned with the corresponding outer through hole (432); An annular end plate (44) is provided at one end of the outer cylinder wall (42) close to the valve cover (2), the annular end plate (44) simultaneously connecting the outer cylinder wall (42) and the inner cylinder wall (41), and an end of the outer cylinder wall (42) away from the annular end plate (44) is kept separated from the inner cylinder wall (41); A helical compression spring (6) is provided between the outer cylinder wall (42) and the inner cylinder wall (41), the helical compression spring (6) abuts against the outer cylinder wall (42) and the inner cylinder wall (41) at the same time, and the helical compression spring (6) is respectively connected and fixed to the outer cylinder wall (42) and the inner cylinder wall (41) by means of spot welding; the helical compression spring (6) extends along the circumference of the guide valve cage (4), and the two ends of the helical compression spring (6) are connected to each other; The inlet and outlet flow channel (11) comprises a first flow channel (111), a second flow channel (112) and an installation cavity (113); the installation cavity (113) is located between the first flow channel (111) and the second flow channel (112); the installation cavity (113) is used to install the guide valve cage (4); a center line of the first flow channel (111) and a center line of the second flow channel (112) are parallel to each other; and a center of the installation cavity (113) is located between a center line of the first flow channel (111) and a center line of the second flow channel (112).

2. The ball cage type noise reduction regulating valve according to claim 1, characterized in that: The first flow channel (111) is in communication with an outer space of the guide valve cage (4), and the aperture of the through hole (43) gradually increases in a direction away from a port of the first flow channel (111).

3. The ball cage type noise reduction regulating valve according to claim 1, characterized in that: The valve core (3) is a cylindrical structure, the end wall of the valve core (3) is fixedly connected to the valve stem (5), and the peripheral wall of the valve core (3) is adapted to the inner peripheral surface of the guide valve cage (4); the end wall of the valve core (3) is provided with a connecting hole (43), and the end wall of the valve core (3) is provided with a sound absorbing member (7); the sound absorbing member (7) comprises a base plate (71), the base plate (71) is fixedly connected to the valve core (3), and a fin group (72) is fixedly provided on a side of the base plate (71) away from the valve core (3), and the fins of the fin group (72) are arranged side by side and spaced apart, and slit gaps are formed between adjacent fins.

4. The ball cage type noise reduction regulating valve according to claim 1, characterized in that: The valve core (3) is provided with a guide paddle (8), the guide paddle (8) is provided with a rotating shaft (81), and the guide paddle (8) is rotatably connected to the valve core (3) via the rotating shaft (81).

Images