Sleeve multistage noise reduction regulating valve system

Abstract

The invention belongs to the technical field of regulating valve noise reduction, and particularly relates to a sleeve multi-stage noise reduction regulating valve system which comprises a sleeve multi-stage noise reduction regulating valve, a pneumatic diaphragm actuator, an air source control device, an intelligent control device, a butterfly valve, a reducing joint, a companion flange and a user pipeline. The sleeve multi-stage noise reduction regulating valve comprises a valve body. When fluid enters the valve, water flow is preliminarily dispersed through the first noise reduction holes in the outer layer, direct impact of the fluid on the valve body is reduced, noise is lowered, the water flow enters the upper sleeve and then falls onto the inclined buffer baffles, the buffer baffles are arranged in an up-and-down alternate multi-layer mode, and therefore the situation that the water flow vertically falls down and directly flushes the valve body is avoided, and noise is further lowered; and then the water flow passes through the second noise reduction hole in the inner layer, the water flow is further dispersed, direct impact of the fluid on the valve body is reduced again, formation of turbulent flow can be effectively restrained through the first noise reduction hole with the variable diameter, the second noise reduction hole with the variable diameter and the inclined buffering baffle, and therefore noise is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of noise reduction of regulating valves, and particularly to a sleeve multi-stage noise reduction regulating valve system. Background Art

[0002] In industries such as metallurgy, precise control of the medium pressure is crucial. A regulating valve is a valve used to control the fluid flow rate and pressure, and is widely applied in the field of industrial automation control: The regulating valve receives a control signal from a controller, such as a 4-20 mA current signal or a 0-10 V voltage signal, etc., through an actuator, converts it into a corresponding mechanical displacement, and pushes the valve stem and the valve core to move up and down in the sleeve. When the valve core moves upward, the channel area of the throttling window on the sleeve increases, and the fluid flow rate increases; conversely, when the valve core moves downward, the channel area of the throttling window decreases, and the fluid flow rate decreases, thereby achieving precise adjustment of parameters such as the flow rate and pressure of the medium in the pipeline.

[0003] For some existing regulating valves, when facing a medium flow rate with large flow and high pressure difference, the impact force of the medium on the valve body is relatively large, resulting in a large direct impact force received by the valve body, causing large vibration of the valve body, increasing the degree of damage to the valve body, increasing the maintenance cost, and being difficult to meet the requirements of modern industrial production for equipment. Therefore, it is necessary to develop a sleeve multi-stage noise reduction regulating valve system. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] To solve the above technical problems, according to one aspect of the present invention, the following technical solutions are provided:

[0006] A sleeve multi-stage noise reduction regulating valve system, which includes a sleeve multi-stage noise reduction regulating valve, a pneumatic diaphragm actuator, a gas source control device, an intelligent control device, a butterfly valve, a reducing joint, a mating flange, and a user pipeline; the sleeve multi-stage noise reduction regulating valve includes a valve body, and a "Z" streamline-shaped channel is provided inside the valve body, and one end of the channel is a water inlet end and the other end is a water outlet end;

[0007] A sleeve guiding structure is provided in the channel of the valve body. A valve flap for controlling the opening / closing of the channel is provided in the sleeve guiding structure. The sleeve guiding structure includes an annular upper sleeve fixed in the channel and an annular lower sleeve fixed directly below the upper sleeve. A first noise reduction hole communicating with the water inlet end is opened on the side wall of the upper sleeve, and a second noise reduction hole communicating with the water outlet end is opened on the side wall of the lower sleeve. The inner diameter of the first noise reduction hole gradually increases from the water inlet end towards the inner cavity of the upper sleeve, and the inner diameter of the second noise reduction hole gradually increases from the inner cavity of the lower sleeve towards the water outlet end. Obliquely arranged buffer baffles are equidistantly arranged in a circumferential manner with the center of the lower sleeve as the center of the circle on the inner side of the lower sleeve;

[0008] The pneumatic diaphragm actuator is connected to the top end of the valve stem. The sleeve multi-stage noise reduction regulating valve further includes an electric positioner for indicating the current height of the valve stem;

[0009] The air source control device includes a large-flow type pressure reducing valve and a speed control valve and is connected to the pneumatic diaphragm actuator through an air pipe;

[0010] A pressure sensor is provided on the user pipeline, and the butterfly valve is arranged on the user pipeline; the intelligent control device is respectively connected to the pressure sensor and the electric positioner through signal lines;

[0011] Both ends of the reducing joint are fixedly connected to the user pipeline and the water inlet end of the valve body through mating flanges, bolts and nuts.

[0012] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: the valve flap includes an upper valve core fixed on the valve stem and a lower valve core fixed at the lower end of the valve stem. The upper valve core is cylindrical, the lower valve core is circular plate-shaped, and the outer diameter of the lower valve core is smaller than the inner diameter of the upper valve core. The valve flap moves smoothly up and down along the axis of the upper sleeve and the lower sleeve to control the opening / closing of the channel.

[0013] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: sealing rings are provided on the outer sides of the upper valve core and the lower valve core. The sealing ring of the upper valve core is in interference fit with the inner side of the upper sleeve, and the sealing ring of the lower valve core is in interference fit with the inner side of the lower sleeve.

[0014] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: when the valve flap descends to the lowest end, the channel is closed. The sealing ring on the outer side of the upper valve core is closely attached to the inner side wall of the upper sleeve, blocking all the first noise reduction holes. The sealing ring on the outer side of the lower valve core is closely attached to the upper edge of the inner side of the lower sleeve, and the inner cavities of the upper sleeve and the lower sleeve are not communicated;

[0015] When the valve flap gradually rises, the channel gradually opens.

[0016] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: an elastic diaphragm and a plurality of damping springs are arranged inside the pneumatic diaphragm actuator, and the elastic diaphragm is made of an elastic material;

[0017] The elastic diaphragm is circular and its edge is arranged on the side wall of the inner chamber of the pneumatic diaphragm actuator, and divides the inner chamber of the pneumatic diaphragm actuator into upper and lower parts.

[0018] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: the plurality of damping springs are evenly distributed around the elastic diaphragm at equal intervals, and the damping springs are vertically located between the elastic diaphragm and the pneumatic diaphragm actuator;

[0019] The rod body of the valve stem slides through the bottom of the pneumatic diaphragm actuator and is fixedly connected to the center of the elastic diaphragm;

[0020] The outer shell of the pneumatic diaphragm actuator is a sealed structure formed by connecting the upper and lower parts with bolts, and the side wall is provided with an air inlet and an air outlet, and the air inlet is connected to the air pipe of the air source control device.

[0021] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: a fixing frame is fixedly installed at the bottom of the outer shell of the pneumatic diaphragm actuator, the fixing frame is in a "U" shape, the rod body of the valve stem slides through the fixing frame, and a height mark corresponding to the height position of the valve stem is arranged inside the fixing frame.

[0022] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: the large flow rate type pressure reducing valve and the speed control valve are connected to each other through a hard metal pipe, and the connection part is sealed by a sealing joint. The air inlet end of the large flow rate type pressure reducing valve is connected to the air source through a pipe, the air outlet end is connected to the air inlet end of the speed control valve through a pipe, and the air outlet end of the speed control valve is connected to the air inlet of the pneumatic diaphragm actuator through a pipe.

[0023] As a preferred solution of a sleeve multi-stage noise reduction regulating valve system according to the present invention, wherein: an operation panel with a plurality of control buttons and a display screen is distributed on the surface of the outer shell of the intelligent control device. A circuit board and a PID adjustment module are arranged inside the intelligent control device. The circuit board is connected to the pressure sensor through a line to receive the pressure signal. The circuit board line is connected to the electric positioner, and the electric positioner is connected to the air source control device.

[0024] As a preferred embodiment of the sleeve multi-stage noise reduction regulating valve system of the present invention, it further includes an air filtering device, and the air filtering device is connected to the intake end of the air source control device through a pipeline.

[0025] The beneficial effects of the present invention are as follows: When the fluid enters the valve, it first passes through the first noise reduction holes in the outer layer to initially disperse the water flow, reducing the direct impact of the fluid on the valve body and lowering the noise. After the water flow enters the upper sleeve, it then falls onto the inclined buffer baffle. The buffer baffle can be arranged in multiple layers and alternately arranged up and down, so as to avoid the water flow falling vertically and directly hitting the valve body, further reducing the noise. Then the water flow passes through the second noise reduction holes in the inner layer to further disperse the water flow and reduce the direct impact of the fluid on the valve body again. That is, through the two stepped first noise reduction holes and second noise reduction holes and the inclined buffer baffle, the formation of turbulence can be effectively inhibited, thereby reducing the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0027] Figure 1 is a schematic structural diagram of the sleeve multi-stage noise reduction regulating valve of the present invention;

[0028] Figure 2 is a schematic structural diagram of the inside of the cross-section of the pneumatic diaphragm actuator of the present invention;

[0029] Figure 3 is a schematic structural diagram of the inside of the cross-section of the valve body of the present invention;

[0030] Figure 4 is the present invention Figure 3 schematic structural diagram of the middle sleeve guiding structure and the cross-section of the valve flap;

[0031] Figure 5 is a schematic structural diagram of the valve flap and the valve stem of the present invention;

[0032] Figure 6 is the present invention Figure 5 schematic structural diagram in the upward view direction;

[0033] Figure 7 is the present invention Figure 4 schematic structural diagram of the valve flap and the valve stem after rising;

[0034] Figure 8 is the present invention Figure 3 schematic structural diagram of the valve flap and the valve stem after rising;

[0035] Figure 9 It is a schematic structural diagram of the whole invention;

[0036] Figure 10 It is a schematic diagram of the control principle of the present invention.

[0037] In the figure: 100 - Sleeve multi - stage noise reduction regulating valve; 101 - Pneumatic diaphragm actuator; 102 - Air source control device; 103 - Intelligent control device; 104 - Butterfly valve; 105 - Reducing joint; 106 - Matching flange; 107 - Valve body; 108 - Sleeve guiding structure; 1081 - Upper sleeve; 1082 - Lower sleeve; 1083 - First noise reduction hole; 1084 - Second noise reduction hole; 1085 - Buffer baffle; 109 - Valve flap; 1091 - Upper valve core; 1092 - Lower valve core; 110 - Valve stem; 111 - Large flow type pressure reducing valve; 112 - Speed control valve; 113 - Electric positioner; 114 - Elastic diaphragm; 115 - Damping spring; 116 - Fixed bracket; 117 - Height mark; 200 - User pipeline; 201 - Pressure sensor. Specific embodiments

[0038] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings.

[0039] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for the convenience of explanation, the cross - sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three - dimensional spatial dimensions including length, width and depth should be included.

[0041] To make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings.

[0042] Please refer to Figures 1 - 9 , which shows a schematic structural diagram of an embodiment of a sleeve multi - stage noise reduction regulating valve system of the present invention. Please refer to Figures 1 - 9 , and a detailed introduction to a sleeve multi - stage noise reduction regulating valve system will be given.

[0043] Embodiment 1: A sleeve multi-stage noise reduction regulating valve system includes a sleeve multi-stage noise reduction regulating valve 100, a pneumatic diaphragm actuator 101, a gas source control device 102, an intelligent control device 103, a butterfly valve 104, a reducing joint 105, a mating flange 106, and a user pipeline 200. The sleeve multi-stage noise reduction regulating valve 100 includes a valve body 107. A "Z"-shaped streamline channel is provided inside the valve body 107. One end of the channel is a water inlet end and the other end is a water outlet end.

[0044] A sleeve guiding structure 108 is arranged in the channel of the valve body 107. A valve flap 109 for controlling the opening / closing of the channel is arranged inside the sleeve guiding structure 108. The sleeve guiding structure 108 includes an annular upper sleeve 1081 fixed in the channel and an annular lower sleeve 1082 fixed directly below the upper sleeve 1081. A first noise reduction hole 1083 communicating with the water inlet end is opened on the side wall of the upper sleeve 1081. A second noise reduction hole 1084 communicating with the water outlet end is opened on the side wall of the lower sleeve 1082. The inner diameter of the first noise reduction hole 1083 gradually increases from the water inlet end towards the inner cavity of the upper sleeve 1081. The inner diameter of the second noise reduction hole 1084 gradually increases from the inner cavity of the lower sleeve 1082 towards the water outlet end. Oblique buffer baffles 1085 are arranged equidistantly in a circumferential manner with the center of the lower sleeve 1082 as the center. The buffer baffles 1085 in the figure are arranged in a "single layer". In actual use, the buffer baffles 1085 can be arranged in multiple layers as required, and each layer is arranged alternately up and down. The buffer baffles 1085 in the lower layer are directly below the middle of the two buffer baffles 1085 in the upper layer. In this way, the buffer baffles 1085 can block the direct impact of the water flow. Moreover, spiral grooves can be provided on the inner sides of the first noise reduction hole 1083 and the second noise reduction hole 1084, which are not shown in the figure. When the fluid enters the valve, it first passes through the outer first noise reduction hole 1083 to initially disperse the water flow, reducing the direct impact of the fluid on the valve body 107 and reducing noise. After the water flow enters the upper sleeve 1081, it then falls onto the oblique buffer baffles 1085. The buffer baffles 1085 can be arranged in multiple layers and alternately up and down, so as to avoid the water flow falling vertically and directly impacting the valve body 107, further reducing the noise. Then the water flow passes through the inner second noise reduction hole 1084 to further disperse the water flow, reducing the direct impact of the fluid on the valve body 107 again. That is, through the two variable-diameter first noise reduction hole 1083 and the second noise reduction hole 1084 and the oblique buffer baffles 1085, the formation of turbulence can be effectively inhibited, thereby reducing noise. A wear-resistant coating and an anti-corrosion coating can be provided on the surface of the buffer baffles 1085 to improve the anti-corrosion performance and wear-resistant performance of the buffer baffles 1085.

[0045] The pneumatic diaphragm actuator 101 is connected to the top end of the valve stem 110. The pneumatic diaphragm actuator 101 drives the valve stem 110 to move to adjust the valve opening. The sleeve multi-stage noise reduction regulating valve 100 further includes an electric positioner 113 for indicating the current height of the valve stem 110. A fixing bracket 116 is fixedly installed at the bottom of the outer shell of the pneumatic diaphragm actuator 101. The fixing bracket 116 is in a "U" shape. The body of the valve stem 110 slidably penetrates through the fixing bracket 116, and a height mark 117 corresponding to the height position of the valve stem 110 is provided inside the fixing bracket 116;

[0046] The air source control device 102 includes a large flow type pressure reducing valve 111 and a speed control valve 112 and is connected to the pneumatic diaphragm actuator 101 through a gas pipe;

[0047] A pressure sensor 201 is provided on the user pipeline 200. The butterfly valve 104 is arranged on the user pipeline 200; The butterfly valve 104 includes an annular valve seat and a circular plate-shaped valve plate. The valve seat is fixedly installed on the inner wall of the pipeline. The valve plate can rotate around the central axis in the valve seat. The connection part between the valve plate and the pipeline in the pipeline is sealed with a sealing gasket. A protective cover connected to the outer wall of the pipeline by bolts is provided outside. A plurality of sealing grooves with sealing rings installed are provided on the valve seat. Sealing rings are installed in the sealing grooves to improve the sealing performance between the valve plate and the valve seat; The intelligent control device 103 is respectively connected to the pressure sensor 201 and the electric positioner 113 through signal lines; A pressure gauge and a flow meter connected to the intelligent control device 103 through signal lines are also provided on the user pipeline 200 and are connected to the intelligent control device 103 through signal lines so that the intelligent control device 103 can obtain relevant data;

[0048] Both ends of the reducing joint 105 are fixedly connected to the user pipeline 200 and the water inlet end of the valve body 107 through mating flanges 106, bolts and nuts; The reducing joint 105 has different pipe diameters at both ends. Its small diameter end and large diameter end are respectively connected to pipelines with corresponding pipe diameters. The transition section of the reducing joint 105 is a smooth transition structure, adopting a gradually changing curve shape, so that the fluid can smoothly transition when passing through the reducing joint 105; The reducing joint 105 is connected to the pipeline by welding or flange. When using welding connection, the welding part is polished and inspected for defects to ensure the welding quality; When using flange connection, the flanges are sealed with a sealing gasket and tightened with bolts and nuts; Reinforcing ribs are provided outside the reducing joint 105. The reinforcing ribs are distributed along the axial direction of the reducing joint 105 to enhance the structural strength of the reducing joint 105; At the same time, an anti-corrosion coating is provided on the inner wall of the reducing joint 105 to prevent the fluid from corroding the inner wall of the reducing joint 105;

[0049] The mating flange 106 has a sealing surface, which is a smooth plane and the surface roughness meets the requirements of relevant standards; the mating flange is fixedly connected to the flanges of the valve and the pipeline by bolts and nuts. The bolts are evenly distributed on the circumference of the flange. After the nuts are tightened, the sealing surfaces of the mating flange and the flanges of the valve and the pipeline are mutually attached to achieve sealing; a sealing groove is provided on the sealing surface of the mating flange, and a sealing gasket is installed in the sealing groove. The material of the sealing gasket is selected according to the properties of the fluid and the working pressure; the outer diameter and thickness of the mating flange 106 are designed according to the specifications of the valve and the pipeline to ensure that it can withstand the corresponding pressure and torque; at the same time, a plurality of lifting holes are provided on the outer circumference of the mating flange 106 to facilitate installation and disassembly.

[0050] Embodiment 2: On the basis of Embodiment 1, the valve flap 109 includes an upper valve core 1091 fixed on the rod body of the valve stem 110 and a lower valve core 1092 fixed at the lower end of the valve stem 110. The upper valve core 1091 is in a cylindrical shape, the lower valve core 1092 is in a round plate shape, and the outer diameter of the lower valve core 1092 is smaller than the inner diameter of the upper valve core 1091. The valve flap 109 moves smoothly up and down axially along the lower sleeve 1082 of the upper sleeve 1081 to control the opening / closing of the channel.

[0051] Sealing rings are arranged on the outer sides of both the upper valve core 1091 and the lower valve core 1092. The sealing ring of the upper valve core 1091 is in interference fit with the inner side of the upper sleeve 1081, and the sealing ring of the lower valve core 1092 is in interference fit with the inner side of the lower sleeve 1082.

[0052] When the valve flap 109 descends to the lowest end, the channel is closed. The sealing ring on the outer side of the upper valve core 1091 is closely attached to the inner side wall of the upper sleeve 1081 to block all the first noise reduction holes 1083. The sealing ring on the outer side of the lower valve core 1092 is closely attached to the upper edge of the inner side of the lower sleeve 1082, and the inner cavities of the upper sleeve 1081 and the lower sleeve 1082 are not communicated; at this time, the channel can be regarded as being sealed twice by the upper valve core 1091 and the lower valve core 1092, improving the sealing performance when the channel is closed.

[0053] When the valve flap 109 gradually rises, the channel gradually opens.

[0054] Embodiment 3: On the basis of Embodiment 1, an elastic diaphragm 114 and a plurality of damping springs 115 are arranged inside the pneumatic diaphragm actuator 101. The elastic diaphragm 114 is made of an elastic material.

[0055] The elastic diaphragm 114 is circular and its edge is arranged on the side wall of the inner cavity of the pneumatic diaphragm actuator 101, and divides the inner cavity of the pneumatic diaphragm actuator 101 into upper and lower parts.

[0056] A plurality of the damping springs 115 are evenly distributed around the elastic diaphragm 114 as the center, and the damping springs 115 are vertically located between the elastic diaphragm 114 and the pneumatic diaphragm actuator 101;

[0057] The rod body of the valve stem 110 slides through the bottom of the pneumatic diaphragm actuator 101 and is fixedly connected to the center of the elastic diaphragm 114;

[0058] The housing of the pneumatic diaphragm actuator 101 is a sealed structure formed by connecting the upper and lower parts with bolts, and the side wall is provided with an air inlet and an air outlet. The air inlet is connected to the air pipe of the air source control device 102; the air inlet realizes air intake into the pneumatic diaphragm actuator 101 through the air source control device 102, and the air outlet can be controlled to be opened or closed as needed to adjust the air pressure in the pneumatic diaphragm actuator 101. Since the elastic diaphragm 114 is made of an elastic material, when the air pressure in the pneumatic diaphragm actuator 101 changes, the height of the central area of the elastic diaphragm 114 changes, thereby driving the rod body of the valve stem 110 to move up and down;

[0059] The large-flow pressure reducing valve 111 and the speed control valve 112 are connected to each other through a hard metal pipe, and the connection part is sealed by a sealing joint. The air inlet end of the large-flow pressure reducing valve 111 is connected to the air source through a pipe, and the air outlet end is connected to the air inlet end of the speed control valve 112 through a pipe. The air outlet end of the speed control valve 112 is connected to the air inlet of the pneumatic diaphragm actuator 101 through a pipe; the air source control device 102 is provided with a plurality of brackets for fixing pipes and control elements, and the brackets are installed on the base to ensure the positions of the elements are fixed;

[0060] The outer surface of the housing of the intelligent control device 103 is an operation panel distributed with a plurality of control buttons and a display screen. The interior of the intelligent control device 103 is provided with a circuit board and a PID adjustment module. The circuit board is connected to the pressure sensor 201 through a line to receive a pressure signal. The circuit board line is connected to the electric positioner 113, and the electric positioner 113 is connected to the air source control device 102; the housing of the intelligent control device 103 is made of a metal material and is provided with a cooling fan and cooling holes inside; the housing of the intelligent control device 103 is made of a metal material, has good electromagnetic shielding performance, and is provided with a cooling fan and cooling holes inside to ensure that the electronic components work in a normal temperature environment;

[0061] It also includes an air filtration device (not shown in the figure). The air filtration device is connected to the intake end of the air source control device 102 through a pipeline. This pipeline is a flexible hose, and the connection part is connected by a quick connector, which is convenient for installation and disassembly. The intake end of the air filtration device is connected to the air source to filter the air source entering the air source control device 102. The shell of the air filtration device is made of plastic, and a filter element and a pressure reducing device are provided inside. The filter element can filter impurities and moisture in the air source. At the same time, the air filtration device is installed at a suitable position in the system through a bracket to ensure its stable operation.

[0062] The intelligent control device 103 is also provided with a backup power supply module. This backup power supply module is connected in parallel with the main power supply circuit of the intelligent control device 103 through a circuit. When the main power supply fails, the backup power supply module can automatically switch and supply power to the intelligent control device 103. The backup power supply module is installed inside the shell of the intelligent control device 103 and fixed to the shell by means of a buckle and a slot. And it is provided with a power display window for displaying the remaining power. By setting the backup power supply module, in the event of a sudden power outage or other special circumstances when the main power supply circuit cannot be used, the backup power supply module can be started to ensure the normal use of this device.

[0063] When actually installing and using this sleeve multi-stage noise reduction regulating valve system, first operate according to the installation precautions. Before installation, store the valve in a dry warehouse, coat the valve stem and machined surfaces with an anti-rust agent to avoid outdoor storage and the force of the pneumatic actuator. Carefully check the valve markings and nameplates to ensure they meet the usage requirements. It is strictly prohibited for users to disassemble and assemble without permission.

[0064] The valve should be installed on a horizontal pipeline as much as possible and installed according to the medium flow direction indicated by the arrow on the valve. After installation, fasten the mating flange and the valve body fasteners according to the pipeline installation acceptance requirements.

[0065] During the operation of the system, the butterfly valve 104 remains fully open. The pressure sensor 201 continuously monitors the pressure in the pipeline in front of the butterfly valve 104 and feeds the signal back to the intelligent control device 103. The intelligent control device 103 makes a comparison according to the set system pressure requirement.

[0066] If the pressure in front of the valve is higher than the required working pressure of the system, the intelligent control device 103 sends a 4 - 20mA increasing opening control current signal to the electric positioner 113. After receiving the signal, the electric positioner 113 converts it into a corresponding air pressure signal, and reduces the air source input through the large flow type pressure reducing valve 111 and the speed control valve 112 in the air source control device 102. The elastic diaphragm 114 and the damping spring 115 of the pneumatic diaphragm actuator 101 reset, driving the valve stem 110 to lift the valve flap 109 to achieve overflow, so that the pressure in front of the valve is controlled at the system pressure set value.

[0067] Conversely, if the pressure before the valve is lower than the required operating pressure of the system, the intelligent control device 103 sends a 4-20 mA control current signal with a reduced opening to the electric positioner 113; after the electric positioner 113 converts the signal, the air source control device 102 increases the air source input, and the thrust in the upper chamber of the pneumatic diaphragm actuator 101 overcomes the force of the damping spring 115, pushing the valve stem 110 to displace the valve flap 109 downward, reducing the flow area and raising the pressure before the valve to the set value;

[0068] In terms of maintenance, regularly check whether the fasteners are loose, whether the sealing surface is damaged, whether the valve opens and closes smoothly, and whether the shell is corroded, etc.; if leakage is found at the sealing surface, if there is dirt attached to the sealing surface, just remove the dirt; if the sealing surface is eroded and damaged, it is necessary to repair it by re-welding and machining or replace it; for leakage at the packing, according to different reasons, take measures such as tightening the packing gland nut, increasing the number of packing rings, replacing the packing or the valve stem; if there is operation jamming, for different failure reasons, such as too tight packing, skewed gland device, etc., carry out corresponding treatments respectively; when the air source control is abnormal, check the control components such as the positioner and the intelligent controller, as well as the air source pipeline, and replace the damaged parts;

[0069] All disassembly and maintenance need to be carried out during shutdown, gas cut-off, power cut-off, pressure relief or maintenance period; the repair of important parts of the valve should be carried out under the guidance of the valve manufacturer; after the valve is overhauled and reassembled, conduct a pressure test according to the corresponding standards and make records.

[0070] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way, and the exhaustive description of these combinations is omitted in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sleeve multi-stage noise reduction regulating valve system, comprising a sleeve multi-stage noise reduction regulating valve (100), a pneumatic diaphragm actuator (101), an air source control device (102), an intelligent control device (103), a butterfly valve (104), a reducing joint (105), a matching flange (106) and a user pipeline (200), characterized in that: The sleeve multi-stage noise reduction regulating valve (100) comprises a valve body (107), wherein a "Z" streamlined channel is provided inside the valve body (107), wherein one end of the channel is a water inlet end, and the other end is a water outlet end; A sleeve guide structure (108) is provided in the channel of the valve body (107), and a valve flap (109) for controlling the opening / closing of the channel is provided in the sleeve guide structure (108). The sleeve guide structure (108) comprises an annular upper sleeve (1081) fixed in the channel and an annular lower sleeve (1082) fixed directly below the upper sleeve (1081). A first noise reduction hole (1082) communicating with the water inlet end is opened on the side wall of the upper sleeve (1081). 83), a second noise reduction hole (1084) connected to the water outlet is opened on the side wall of the lower sleeve (1082), the inner diameter of the first noise reduction hole (1083) gradually increases from the water inlet end toward the inner cavity of the upper sleeve (1081), and the inner diameter of the second noise reduction hole (1084) gradually increases from the inner cavity of the lower sleeve (1082) toward the water outlet, and an oblique buffer baffle (1085) is arranged on the inner side of the lower sleeve (1082) at equal intervals around the center of the ring itself; The pneumatic diaphragm actuator (101) is connected to the top end of the valve stem (110), and the sleeve multi-stage noise reduction regulating valve (100) further comprises an electrical positioner (113) for indicating the current height of the valve stem (110); The air source control device (102) comprises a large flow type pressure reducing valve (111) and a speed control valve (112) and is connected to the pneumatic diaphragm actuator (101) via an air pipe; The user pipeline (200) is provided with a pressure sensor (201), and the butterfly valve (104) is provided on the user pipeline (200); the intelligent control device (103) is connected to the pressure sensor (201) and the electrical positioner (113) respectively through signal lines; The two ends of the reducer (105) are respectively fastened to the user pipeline (200) and the water inlet end of the valve body (107) through matching flanges (106), bolts and nuts.

2. A sleeve multi-stage noise reduction regulating valve system according to claim 1, characterized in that: The valve flap (109) includes an upper valve core (1091) fixed on the body of the valve stem (110) and a lower valve core (1092) fixed on the lower end of the valve stem (110), the upper valve core (1091) is cylindrical, the lower valve core (1092) is disc-shaped, and the outer diameter of the lower valve core (1092) is smaller than the inner diameter of the upper valve core (1091), and the valve flap (109) moves up and down smoothly along the axial direction of the lower sleeve (1082) of the upper sleeve (1081) to control the opening / closing of the channel.

3. A sleeve multi-stage noise reduction regulating valve system according to claim 2, characterized in that: The outer sides of the upper valve core (1091) and the lower valve core (1092) are both provided with sealing rings. The sealing ring of the upper valve core (1091) is interference fit with the inner side of the upper sleeve (1081), and the sealing ring of the lower valve core (1092) is interference fit with the inner side of the lower sleeve (1082).

4. A sleeve multi-stage noise reduction regulating valve system according to claim 3, characterized in that: When the valve flap (109) drops to the bottom, the channel is closed, the sealing ring on the outer side of the upper valve core (1091) fits tightly against the inner wall of the upper sleeve (1081), blocking all the first noise reduction holes (1083), and the sealing ring on the outer side of the lower valve core (1092) fits tightly against the inner upper edge of the lower sleeve (1082), and the inner cavity of the upper sleeve (1081) is not connected to the inner cavity of the lower sleeve (1082); When the valve flap (109) gradually rises, the channel gradually opens.

5. The sleeve multi-stage noise reduction regulating valve system according to claim 1, characterized in that: An elastic diaphragm (114) and a plurality of damping springs (115) are arranged inside the pneumatic film actuator (101), and the elastic diaphragm (114) is made of an elastic material; The elastic diaphragm (114) is circular and has an edge arranged on the side wall of the internal chamber of the pneumatic diaphragm actuator (101), and divides the internal chamber of the pneumatic diaphragm actuator (101) into two upper and lower parts.

6. A sleeve multi-stage noise reduction regulating valve system according to claim 5, characterized in that: The plurality of damping springs (115) are distributed around the elastic diaphragm (114) at equal intervals, and the damping springs (115) are vertically located between the elastic diaphragm (114) and the pneumatic film actuator (101); The body of the valve stem (110) slides through the bottom of the pneumatic film actuator (101) and is fixedly connected to the center of the elastic diaphragm (114); The shell of the pneumatic diaphragm actuator (101) is a sealed structure formed by connecting the upper and lower parts by bolts, and the side wall is provided with an air inlet and an air outlet, and the air inlet is connected to the air pipe of the air source control device (102).

7. The sleeve multi-stage noise reduction regulating valve system according to claim 1, characterized in that: A fixing frame (116) is fixedly mounted on the bottom of the housing of the pneumatic diaphragm actuator (101), and the fixing frame (116) is in a "U" shape. The body of the valve stem (110) slides through the fixing frame (116), and a height mark (117) corresponding to the height position of the valve stem (110) is provided on the inner side of the fixing frame (116).

8. The sleeve multi-stage noise reduction regulating valve system according to claim 6, characterized in that: The large flow type pressure reducing valve (111) and the speed control valve (112) are connected to each other via a hard metal pipe and the connection parts are sealed by a sealing joint. The air inlet end of the large flow type pressure reducing valve (111) is connected to the air source via a pipeline, and the air outlet end is connected to the air inlet end of the speed control valve (112) via a pipeline. The air outlet end of the speed control valve (112) is connected to the air inlet of the pneumatic diaphragm actuator (101) via a pipeline.

9. The sleeve multi-stage noise reduction regulating valve system according to claim 1, characterized in that: The surface of the shell of the intelligent control device (103) is provided with an operation panel with a plurality of control buttons and a display screen. A circuit board and a PID adjustment module are provided inside the intelligent control device (103). The circuit board is connected to a pressure sensor (201) via a line to receive a pressure signal. The circuit board line is connected to an electrical positioner (113), and the electrical positioner (113) is connected to an air source control device (102).

10. The sleeve multi-stage noise reduction regulating valve system according to claim 1, characterized in that: It also includes an air filter device, which is connected to the air inlet end of the air source control device (102) through a pipeline.

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