Double-spring controlled noise reduction pressure reducing valve

Abstract

The invention discloses a noise reduction pressure reducing valve controlled by double springs, and relates to the technical field of pressure executing mechanisms, the noise reduction pressure reducing valve comprises a valve body, a valve element connected to the interior of the valve body in a sliding mode and an executing mechanism driving the valve element to move vertically, the executing mechanism comprises an outer shell, and a pressure cavity communicated with the upper portion is formed in the outer shell; the top end of the outer shell is fixedly connected with a medium input connector. The side, close to the medium input connector, of the pressure piston is a spherical surface, and the peripheral wall of the pressure piston is fixedly connected with a sealing ring attached to the inner wall of the pressure cavity in a sealed mode. The pressure supply mechanism is arranged between the outer shell and the valve element and provides resistance for the sealing ring, so that the sealing ring is driven to drive the valve element to move, and a corresponding pressure value needs to be provided. The pressure piston and the sealing ring are in sliding fit with the pressure cavity of the outer shell, piston type driving is achieved, the sealing performance is good, the driving process is stable, meanwhile, noise reduction is facilitated, the service life is long, maintenance is convenient, and the use quality of the pressure reducing valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fluid pressure actuators, and in particular to a noise-reducing pressure reducing valve controlled by double springs. Background Art

[0002] The pressure reducing valve is an important fluid pressure control device that can reduce the higher liquid pressure in the pipeline before the valve to the required level in the pipeline after the valve to protect downstream equipment and pipelines from damage caused by excessive pressure and ensure the safe and stable operation of the system. This valve is widely used in water supply systems.

[0003] The pressure reduction principle of the traditional pressure reducing valve is that the pressure actuator on the valve body controls the opening and closing degree between the valve core and the valve port in the valve body, changes the throttling area of ​​the fluid transmission in the valve body, changes the flow rate and kinetic energy of the fluid, causes different pressure losses, and achieves the purpose of pressure reduction to maintain the constant outlet pressure of the valve body.

[0004] At present, the pressure actuators on the pressure reducing valve are mainly divided into two modes: medium pressure drive and external power drive. In the medium pressure drive type pressure actuator, the reed (diaphragm) is mainly relied on to receive and feedback the pressure. The valve core can be driven according to the change of the inlet fluid pressure on the valve body with the pressure spring to ensure the constant outlet pressure. However, in actual use, it is found that this sheet structure that relies on its own elastic deformation ability to receive and feedback the medium pressure has the following problems: The sealing installation of the reed on the housing is difficult, and the sealing is difficult to ensure, which affects the stability of use and increases the difficulty of subsequent maintenance; The reed is prone to elastic fatigue after long-term use, which affects the accuracy and timeliness of medium pressure transmission, and has a short service life, which increases maintenance frequency and affects the use effect. Summary of the invention

[0005] The object of the present invention is to provide a noise-reducing pressure reducing valve controlled by double springs to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a double-spring controlled noise reduction pressure reducing valve, comprising a valve body, a valve core slidably connected to the inside of the valve body, and an actuator for driving the valve core to move vertically to change the throttling area in the valve body, the actuator comprising: An outer shell, wherein a pressure chamber communicating with the upper side is provided inside the outer shell, and a medium input joint for assisting medium to enter the pressure chamber is fixedly connected to the top of the outer shell; A pressure piston, wherein the side of the pressure piston close to the medium input joint is spherical, and the outer peripheral wall of the pressure piston is fixedly connected with a sealing ring that is in sealing contact with the inner wall of the pressure chamber; The pressure supply mechanism is arranged between the outer shell and the valve core. The pressure supply mechanism provides resistance for the sealing ring so that the sealing ring is driven to drive the valve core to move and needs to provide a corresponding pressure value.

[0007] Preferably, the valve body is provided with an input chamber and an output chamber that are oppositely distributed on both sides, and a throttle hole connecting the input chamber and the output chamber is provided between the input chamber and the output chamber and directly below the valve core; A valve stem is fixedly connected to the side of the valve core away from the throttle hole, and a stabilizer is fixedly arranged between the valve body and the pressure supply mechanism, and the stabilizer comprises: A hollow shell, wherein the hollow shell is a cavity structure, and the top of the valve stem sequentially penetrates the valve body and the hollow shell and extends to an upper position; A connecting slide seat, wherein the connecting slide seat is slidably connected in the cavity of the hollow shell, and the connecting slide seat is fixedly connected to the outer wall of the valve stem; A stabilizing spring is movably sleeved on the outer wall of the valve stem, and the stabilizing spring is fixedly connected between the connecting slide seat and the bottom of the cavity of the hollow shell. The stabilizing spring is used to guide the valve stem to move stably.

[0008] Preferably, the pressure supply mechanism comprises: A pressure regulating spring, wherein an upper spring seat is provided at the top of the pressure regulating spring, and a piston rod is fixedly connected between the upper spring seat and the pressure piston; An externally threaded tube, wherein the externally threaded tube is a hollow structure with two ends connected, and the top of the valve stem passes through the inner cavity of the externally threaded tube and is fixedly connected to the upper spring seat; A pressure regulating nut, the pressure regulating nut is threadedly connected to the outer wall of the externally threaded tube and supports the bottom of the pressure regulating spring, and the pressure regulating nut is used to adjust the initial compression amount of the pressure regulating spring; Support columns, there are at least two support columns and they are spaced apart and distributed between the actuator and the stabilizer, and the support columns are used for fixed support of the outer shell.

[0009] Preferably, a display mechanism for displaying the adjustment amount of the pressure regulating nut is provided between the outer shell and the pressure regulating nut, and the display mechanism comprises: An outer scale ring, which is an inner toothed ring structure with scale lines on the outer peripheral wall, and is rotatably connected to the bottom end of the outer shell; A driving column, wherein the bottom of the driving column is round-headed and rotatably connected with a ball, and the bottom of the driving column is movably fitted with the top of the pressure regulating nut through the ball; An enlarging gear, the enlarging gear is meshedly connected to the inner wall of the outer scale ring, and the enlarging gear is used to drive the outer scale ring to rotate; A reversing transmission member is arranged between the driving column and the enlarging gear, and is used for converting the thrust provided by the vertical movement of the driving column into a rotational force for driving the enlarging gear to rotate.

[0010] Preferably, the reversing transmission member comprises: A rotating tube, the top of which is fixedly connected to the enlarged gear, the top of the driving column extends to the inner cavity of the rotating tube, the middle of the rotating tube is rotatably connected to a first horn frame, and the two ends of the first horn frame are respectively fixedly connected to the outer walls of the two support columns; A spiral channel is provided on the inner wall of the rotating tube, a driving protrusion is fixedly connected to the outer wall of the driving column, and an end of the driving protrusion extends into the spiral channel.

[0011] Preferably, a second bull horn frame fixed to the outer walls of the two supporting columns is provided below the first bull horn frame, a transmission through hole adapted to the driving column is provided in the middle of the second bull horn frame, a guide protrusion is fixedly connected to the inner wall of the transmission through hole of the second bull horn frame, a linear guide groove is provided on the outer wall of the driving column, and the end of the guide protrusion is slidably connected to the inner wall of the linear guide groove.

[0012] Preferably, an internal threaded hole compatible with the external threaded tube is provided in the middle of the pressure-adjusting nut, an internal tooth groove is provided on the side of the pressure-adjusting nut away from the pressure-adjusting spring, an auxiliary slot is provided on the side wall of the pressure-adjusting nut, a positioning mechanism is provided at the bottom end of the manual rod, a lifting spring is fixedly connected between the positioning mechanism and the stabilizer, and the lifting spring is used to provide thrust for the positioning mechanism to engage with the internal tooth groove on the pressure-adjusting nut.

[0013] Preferably, the positioning mechanism comprises: The anti-seismic seat has an inner cavity which is provided with a lifting cavity and a rotating cavity from top to bottom, and a connecting groove which is connected with the lifting cavity is provided at the top of the anti-seismic seat; A special-shaped lifting seat, the special-shaped lifting seat is located in the lifting cavity and can move axially along the anti-vibration seat, an incomplete tooth ring matching the connecting through groove is fixedly connected to the side of the special-shaped lifting seat away from the rotating cavity, a conical through groove is opened at the bottom of the special-shaped lifting seat, and the outer peripheral wall of the incomplete tooth ring is serrated to match the inner tooth groove; A rotating seat, which is located in the rotating cavity and can rotate radially along the anti-seismic seat. A round-headed protrusion is fixedly connected to the top of the rotating seat and located directly below the conical through groove. A manual rod is fixedly connected to the outer peripheral wall of the rotating seat. A toggle groove is opened on the outer peripheral wall of the anti-seismic seat, and the end of the manual rod extends to the outside of the toggle groove.

[0014] Preferably, the outer wall of the special-shaped lifting seat is integrally formed with a column part, the shape of the lifting cavity matches the shape of the combination of the special-shaped lifting seat and the column part, the outer wall of the anti-seismic seat is fixedly connected with a connecting sleeve, and the connecting sleeve is slidably connected to the outer wall of the support column.

[0015] Preferably, a noise reduction mechanism is provided in the input cavity, and the noise reduction mechanism comprises: A muffler plate, wherein the outer wall of the muffler plate is provided with first muffler holes connecting two sides of the muffler plate; The silencer is fixedly connected to the input cavity and wraps the port position of the throttling hole. The outer wall of the silencer is provided with second silencer holes connecting the inside and outside of the silencer. The inner diameter of the first silencer hole and the silencer gradually increases along the flow direction of the fluid.

[0016] Compared with the prior art, the technical effects of the present invention are: (1) In the component structure of the actuator of the present invention, a pressure piston and a sealing ring are used to slide with the pressure chamber of the outer shell to realize piston-type drive. Compared with the elastic sheet structure drive, it not only has good sealing performance and stable driving process, but also improves the accuracy of the actuator driving the valve core movement to achieve throttling area adjustment. At the same time, when the fluid provides driving pressure to squeeze the sealing ring, the pressure piston is in a streamlined spherical shape, so that the fluid can better fit the surface of the pressure piston to flow, reduce the generation of vortices and turbulence, help reduce noise, prolong service life, facilitate maintenance, and improve the use quality of the pressure reducing valve.

[0017] (2) In the pressure supply mechanism of the actuator of the present invention, the preload of the pressure regulating spring can be adjusted by rotating the pressure regulating nut through the cooperation of the pressure regulating spring, the pressure regulating nut and the externally threaded tube, thereby improving the convenience and efficiency of the pressure supply mechanism to the actuator in adjusting the pressure size; and by setting the bottom end of the pressure regulating nut to have an internal tooth groove shape feature, the positioning mechanism at the bottom end of the pressure regulating nut cooperates, and the radial rotation of the pressure regulating nut can be limited by the engagement of the incomplete tooth ring in the positioning mechanism with the internal tooth groove, thereby avoiding the problem that the vibration generated during the overall operation of the pressure reducing valve causes the pressure regulating nut to deflect and affect the accuracy of the preload provided by the pressure regulating spring, so that the pressure value provided by the pressure supply mechanism to the pressure piston is more accurate and stable.

[0018] (3) The present invention provides a display mechanism between the pressure supply mechanism and the actuator, so that the pressure regulating nut can drive the driving column to rise and fall during the process of raising and lowering the pressure regulating spring compression amount. The reversing transmission member is used to convert the lifting motion of the driving column into a rotational motion and amplify it, so that the outer scale ring of the increasing gear rotates at a larger angle. In this way, the expansion and contraction value of the pressure regulating spring can be magnified and displayed, which is convenient for observing the adjustment value, thereby making the pressure supply pressure adjustment operation of the pressure supply mechanism more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the actuator of the present invention.

[0021] Figure 3 It is a semi-sectioned three-dimensional structural schematic diagram of the outer shell of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the retaining frame of the present invention.

[0023] Figure 5 It is a semi-sectioned three-dimensional structural schematic diagram of the rotating tube of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the anti-seismic seat of the present invention.

[0025] Figure 7 It is a semi-sectioned three-dimensional structural schematic diagram of the anti-seismic seat of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating seat of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the special-shaped lifting seat of the present invention.

[0028] Fig.10 It is a bottom-up stereoscopic structural schematic diagram of the pressure-adjusting nut of the present invention.

[0029] Fig.11 It is a front cross-sectional structural schematic diagram of the valve body of the present invention.

[0030] Fig.12 This is one of the partial cross-sectional structural schematic diagrams of the front side of the valve body of the present invention.

[0031] Fig.13 This is the second schematic diagram of the partial cross-sectional structure of the front side of the valve body of the present invention.

[0032] In the figure: 100, valve body; 101, input chamber; 102, output chamber; 103, throttle hole; 104, valve core; 105, valve stem; 106, muffler plate; 108, first muffler hole; 109, muffler tube; 110, second muffler hole; 200, actuator; 201, outer shell; 202, pressure piston; 203, sealing ring; 204, piston rod; 205, medium input joint; 206, upper spring seat; 207, pressure regulating spring; 208, pressure regulating nut; 281, internal threaded hole; 282, internal tooth groove; 283, auxiliary card slot; 209, external threaded pipe; 210, support column; 211, external scale ring; 212, rotating pipe; 213, enlarged tooth Wheel; 214, first horn frame; 215, driving column; 216, linear guide groove; 217, guiding protrusion; 218, ball; 219, spiral channel; 220, driving protrusion; 221, second horn frame; 222, anti-vibration seat; 223, lifting chamber; 224, rotating chamber; 225, connecting through groove; 226, rotating seat; 227, round head protrusion; 228, manual lever; 229, toggle slot; 230, special-shaped lifting seat; 231, conical through groove; 232, column part; 233, incomplete gear ring; 235, connecting sleeve; 236, lifting spring; 300, stabilizer; 301, hollow shell; 302, connecting slide; 303, stabilizing spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides Figure 1-Figure 13 A double spring controlled noise reducing pressure reducing valve is shown.

[0035] Embodiment 1, comprising a valve body 100, a valve core 104 slidably connected to the inside of the valve body 100, and an actuator 200 for driving the valve core 104 to move vertically to change the throttling area in the valve body 100, the valve body 100 is provided with an input chamber 101 and an output chamber 102 which are oppositely distributed on both sides, and a throttling hole 103 connecting the input chamber 101 and the output chamber 102 is provided between the input chamber 101 and the output chamber 102 and directly below the valve core 104, and the throttling area between the two can be changed by moving the valve core 104 above the throttling hole 103, thereby achieving the regulation The actuator 200 provides power for the movement of the valve core 104 according to the pressure of the fluid in the throttle hole 103. When the fluid pressure in the input chamber 101 of the valve body 100 changes, the actuator 200 can provide corresponding driving pressure to the valve core 104 according to the demand of the fluid pressure in the throttle hole 103, so that the valve core 104 moves to a predetermined position, so that the fluid pressure in the throttle hole 103 can be kept constant, protecting the downstream equipment and pipelines from damage caused by excessive pressure, and ensuring the safe and stable operation of the system; further, the valve core 104 deviates from the throttle hole 103. A valve stem 105 is fixedly connected to one side of the valve body 100, and a stabilizer 300 is fixedly arranged between the valve body 100 and the pressure supply mechanism. The stabilizer 300 includes a hollow shell 301, a connecting slide 302 and a stabilizing spring 303. The hollow shell 301 is a cavity structure. The top of the valve stem 105 passes through the valve body 100 and the hollow shell 301 in sequence and extends to the upper position. The connecting slide 302 is slidably connected to the cavity of the hollow shell 301, and the connecting slide 302 is fixedly connected to the outer wall of the valve stem 105. The stabilizing spring 303 is movably sleeved on the outer wall of the valve stem 105. The stabilizing spring 303 The stabilizer 300 is fixedly connected between the connecting slide 302 and the bottom of the cavity of the hollow shell 301. The stabilizing spring 303 is used to guide the valve stem 105 to move stably. The setting of the stabilizer 300 can utilize the actuator 200 to drive the valve core 104 to move through the valve stem 105, so that the valve stem 105 moves and at the same time drives the connecting slide 302 to move in the cavity of the hollow shell 301, thereby pressing down and deforming the stabilizing spring 303, so that the stabilizing spring 303 provides a stabilizing effect on the valve stem 105, thereby maintaining the stability of the opening of the valve core 104 and ensuring the stability of the pressure in the pressure reducing valve; Among them, the actuator 200 includes an outer shell 201, a pressure piston 202 and a pressure supply mechanism. The outer shell 201 is provided with a pressure chamber connected to the top. The top of the outer shell 201 is fixedly connected to a medium input connector 205 for assisting the medium to enter the pressure chamber. The side of the pressure piston 202 close to the medium input connector 205 is spherical. By setting the side of the pressure piston 202 that contacts the external medium as a spherical surface, the shape feature of the spherical surface with a large radius of curvature can be utilized, so that when the fluid hits the spherical surface of the pressure piston 202, the fluid can better fit the surface of the pressure piston 202 and flow, reducing the generation of vortices and turbulence, which can help reduce the noise of the fluid hitting the surface of the pressure piston 202, making the actuator more effective. The actuator 200 has the function of reducing noise and silencing; the outer peripheral wall of the pressure piston 202 is fixedly connected with a sealing ring 203 that is sealed to the inner wall of the pressure chamber. The sealing ring 203 close to the pressure piston 202 can be set to an arc shape that matches the curvature of the upper surface of the pressure piston 202, which can further improve the noise reduction effect. The pressure supply mechanism is arranged between the outer shell 201 and the valve core 104. The pressure supply mechanism provides resistance for the sealing ring 203 so that the sealing ring 203 is driven to drive the valve core 104 to move. The corresponding pressure value needs to be provided. The external medium is connected to the medium input connector 205 through a pipeline, and can enter the pressure chamber of the outer shell 201. The hydraulic pressure or air pressure provided by the external medium is used to provide a downward drive for the pressure piston 202. When the pressure of the fluid in the output chamber 102 increases, causing the pressure in the throttle hole 103 to increase, the pressure provided by the external medium to the pressure piston 202 increases. At this time, the pressure provided by the external medium is greater than the pressure provided by the pressure supply mechanism, so that the pressure piston 202 can move downward, drive the valve core 104 to approach the throttle hole 103, reduce the throttling area between the two, and reduce the pressure of the fluid in the throttle hole 103, so that the fluid in the throttle hole 103 is maintained at a normal pressure value. When the pressure of the fluid in the output chamber 102 decreases, causing the pressure in the throttle hole 103 to decrease, the pressure provided by the external medium to the pressure piston 202 decreases, and the stable pressure provided by the pressure supply mechanism is used to move the pressure piston 202 upward, driving the valve core 104 upward Away from the throttle hole 103, the throttling area between the throttle hole 103 and the valve core 104 is increased, so as to increase the pressure in the output chamber 102 and maintain the pressure in the output chamber 102 constant; a specific implementation method of the external medium can be: the medium input connector 205 is connected to the downstream pipeline connected to the port of the output chamber 102 through the pressure sensing tube, so that the fluid in the downstream pipeline enters the pressure chamber of the outer shell 201 through the pressure sensing tube and the medium input connector 205, so that the pressure source can be provided for the pressure piston 202 to rise or fall according to the change of the fluid pressure in the downstream pipeline, so as to maintain the fluid pressure in the downstream pipeline constant, and improve the stability and safety of fluid transportation; Among them, the pressure supply mechanism includes a pressure regulating spring 207, an externally threaded tube 209, a pressure regulating nut 208 and a support column 210. An upper spring seat 206 is provided at the top of the pressure regulating spring 207. The pressure regulating spring 207 is used for regulation. It can not only regulate the pressure of the fluid transported in the output chamber 102, but also cooperate with the stabilizing spring 303 to realize double spring control of the valve core 104. When the fluid pressure in the pressure reducing valve changes, the two will respond at the same time and adjust according to the preset pressure value to keep the system pressure stable and reliable. A piston rod 204 is fixedly connected between the upper spring seat 206 and the pressure piston 202. The externally threaded tube 209 is a hollow structure connected at both ends. The top of the valve stem 105 passes through the inner cavity of the externally threaded tube 209 and is fixedly connected to the upper spring seat 206. The pressure regulating nut 208 is threadedly connected to the externally threaded tube 209. The outer wall of the corrugated tube 209 supports the bottom of the pressure-regulating spring 207, and the pressure-regulating nut 208 is used to adjust the initial compression of the pressure-regulating spring 207. There are at least two support columns 210 and they are spaced apart between the actuator 200 and the stabilizer 300. The support columns 210 are used to fix and support the outer shell 201. The pressure piston 202 contacts the pressure-regulating spring 207 through the piston rod 204 and the upper spring seat 206, and can be connected to the valve stem 105. When the pressure-regulating nut 208 rotates, it moves axially along the external threaded tube 209 to squeeze the pressure-regulating spring 207 and adjust the initial compression of the pressure-regulating spring 207. The elastic reaction force of the pressure-regulating spring 207 can be used to provide a vertical upward pressure on the pressure piston 202 to meet the setting of the fluid pressure in the output chamber 102.

[0036] Embodiment 2, on the basis of embodiment 1, an internal threaded hole 281 matching with the external threaded tube 209 is provided in the middle of the pressure-adjusting nut 208, an internal tooth groove 282 is provided on the side of the pressure-adjusting nut 208 away from the pressure-adjusting spring 207, an auxiliary slot 283 is provided on the side wall of the pressure-adjusting nut 208, a positioning mechanism is provided at the bottom end of the manual rod 228, a connecting sleeve 235 is fixedly connected to the outer wall of the anti-vibration seat 222, and the connecting sleeve 235 is slidably sleeved on the outer wall of the support column 210, and a lifting spring 236 is fixedly connected between the positioning mechanism and the stabilizer 300, and the lifting spring 236 is used to provide a position engagement between the positioning mechanism and the internal tooth groove 282 on the pressure-adjusting nut 208. To provide thrust, the bottom shape of the conventional pressure regulating nut 208 is changed so that the bottom has an internal tooth groove 282, and then the lifting spring 236 is used to provide the positioning mechanism with thrust to keep it close to the bottom end of the pressure regulating nut 208, and the connecting sleeve 235 is used to limit the positioning mechanism in the radial direction, so that the positioning mechanism can be relatively fixed with the pressure regulating nut 208 in the radial direction, so that when the pressure reducing valve is working, the vibration generated during its own operation can prevent the pressure regulating nut 208 from accidentally rotating and moving on the outer wall of the external threaded tube 209, so that the initial preload force of the pressure regulating spring 207 changes, which affects the pressure execution accuracy of the actuator 200; The positioning mechanism includes an anti-vibration seat 222, a special-shaped lifting seat 230 and a rotating seat 226. The inner cavity of the anti-vibration seat 222 is provided with a lifting cavity 223 and a rotating cavity 224 from top to bottom. The top of the anti-vibration seat 222 is provided with a connecting groove 225 connected to the lifting cavity 223. The special-shaped lifting seat 230 is located in the lifting cavity 223 and can move along the axial direction of the anti-vibration seat 222. The outer wall of the special-shaped lifting seat 230 is integrally formed with a column portion 232. The shape of the lifting cavity 223 matches the shape of the combination of the special-shaped lifting seat 230 and the column portion 232. The special-shaped lifting seat 230 is away from the rotating cavity 224. An incomplete tooth ring 233 matching the connecting groove 225 is fixedly connected, a conical groove 231 is provided at the bottom of the special-shaped lifting seat 230, the outer peripheral wall of the incomplete tooth ring 233 is serrated to match the inner tooth groove 282, the rotating seat 226 is located in the rotating cavity 224 and can rotate radially along the anti-vibration seat 222, a round head protrusion 227 is fixedly connected to the top of the rotating seat 226 and located directly below the conical groove 231, a manual rod 228 is fixedly connected to the outer peripheral wall of the rotating seat 226, and a toggle groove 229 is provided on the outer peripheral wall of the anti-vibration seat 222, and the end of the manual rod 228 extends to the toggle groove 229 In this embodiment, the manual rod 228 can be directional moved in the toggle slot 229, so that the rotating seat 226 can be conveniently driven from the outside to rotate the directional angle inside the anti-vibration seat 222, and then the round head protrusion 227 on the rotating seat 226 is matched with the conical surface through groove 231 at the bottom of the special-shaped lifting seat 230, so that the round head protrusion 227 squeezes the inclined surface of the conical surface through groove 231 during the movement, and drives the special-shaped lifting seat 230 to rise, so that the incomplete gear ring 233 on the special-shaped lifting seat 230 can be extended from the connecting through groove 225 on the anti-vibration seat 222, and the lifting seat 230 can be lifted. When the lowering chamber 223 extends out, it enters the position of the internal tooth groove 282 of the pressure-adjusting nut 208. At the same time, the tooth groove of the outer peripheral wall of the lifting chamber 223 and the tooth groove of the inner wall of the internal tooth groove 282 are used to form a plug-in engagement, so as to limit the pressure-adjusting nut 208 in the radial direction, and prevent the pressure-adjusting nut 208 from rotating on the outer wall of the external threaded tube 209, so that the use accuracy of the actuator 200 is higher and the driving accuracy of the valve core 104 is improved; when unlocking, it is only necessary to move the manual rod 228 to the other end position of the moving slot 229. The operation is simple and convenient, which makes the use of the positioning mechanism more in line with the needs of convenient use.

[0037] Embodiment 3, on the basis of embodiment 1 or embodiment 2, a display mechanism for displaying the adjustment amount of the pressure-adjusting nut 208 is provided between the outer shell 201 and the pressure-adjusting nut 208, the display mechanism comprises an outer scale ring 211, a driving column 215, an increasing gear 213 and a reversing transmission member, the outer scale ring 211 is an inner tooth ring structure with scale lines on the outer peripheral wall, the outer scale ring 211 is rotatably connected to the bottom end of the outer shell 201, the bottom of the driving column 215 is round-headed and rotatably connected to a ball 218, the bottom of the driving column 215 is movably fitted with the top of the pressure-adjusting nut 208 through the ball 218, the increasing gear 213 is meshed and connected to the inner wall of the outer scale ring 211, and the increasing gear 213 is meshed and connected to the inner wall of the outer scale ring 211. 13 is used to drive the outer scale ring 211 to rotate, and the reversing transmission member is arranged between the driving column 215 and the increasing gear 213. The reversing transmission member is used to convert the thrust provided by the vertical movement of the driving column 215 into a rotational force to drive the increasing gear 213 to rotate, wherein the reversing transmission member includes a rotating tube 212 and a spiral channel 219. The top of the rotating tube 212 is fixedly connected to the increasing gear 213, the top of the driving column 215 extends to the inner cavity of the rotating tube 212, and the middle part of the rotating tube 212 is rotatably connected with a first horn frame 214. The two ends of the first horn frame 214 are respectively fixedly connected to the outer walls of the two support columns 210. The spiral channel 219 is opened on the inner wall of the rotating tube 212. The outer wall of the column 215 is fixedly connected with a driving protrusion 220, and the end of the driving protrusion 220 extends into the spiral channel 219. The end of the driving protrusion 220 extending into the spiral channel 219 can be a smooth curved surface or equipped with a ball or roller to reduce the friction resistance between the spiral channel 219, so that the driving protrusion 220 can move more smoothly in the spiral channel 219. Since the spiral channel 219 is spiral, the increase multiple of the rising distance of the driving column 215 can be changed by adjusting the pitch between the upper and lower adjacent channels of the spiral channel 219. In this way, when the driving column 215 rises, not only can the rising action be converted into a rotating action, but also the increase of the gear can be increased. The angle or number of revolutions of the wheel 213 can make the outer scale ring 211 rotate at a larger angle, so that the scale bar on the outer peripheral wall of the outer scale ring 211 can meet the need of conveniently observing the axial movement distance of the pressure regulating nut 208 along the external threaded tube 209. A second horn frame 221 fixed to the outer walls of the two support columns 210 is provided below the first horn frame 214. A transmission through hole adapted to the driving column 215 is provided in the middle of the second horn frame 221. A guide protrusion 217 is fixedly connected to the inner wall of the transmission through hole of the second horn frame 221. A linear guide groove 216 is provided on the outer wall of the driving column 215. The end of the guide protrusion 217 is slidably connected to the inner wall of the linear guide groove 216.According to Hooke's law, the deformation of the pressure regulating spring 207 is directly proportional to the pressure on it. Due to the influence of the elastic stiffness coefficient and the pressure adjustment range, the single adjustment distance of the pressure regulating nut 208 is small, and it is difficult to control the adjustment position during manual adjustment. Therefore, during the rotation and movement of the pressure regulating nut 208, the friction resistance between the driving column 215 and the pressure regulating nut 208 is reduced by the ball 218, so that the pressure regulating nut 208 can drive the driving column 215 to rise synchronously. During the rising process of the driving column 215, the driving column 215 is guided by the guide protrusion 217 and the linear guide groove 216. 5 radially, so that the driving column 215 stably drives the driving protrusion 220 to move upward, and the driving protrusion 220 drives the rotating tube 212 to rotate during the movement of the spiral channel 219. At the same time, the rotation angle or number of circles is increased compared with the moving distance of the pressure regulating nut 208, so that the increasing gear 213 drives the outer scale ring 211 to rotate at a larger angle, so that it is easy to observe the moving distance of the pressure regulating nut 208, and the operation of manually adjusting the lifting distance of the pressure regulating nut 208 is easier to control, which not only reduces the difficulty of operation, but also improves the operation accuracy, so that the actuator 200 drives the valve core 104 more accurately. ;

[0038] Embodiment 4: On the basis of embodiment 1 or embodiment 2 or embodiment 3, a noise reduction mechanism is provided in the input cavity 101, and the noise reduction mechanism includes a silencer plate 106 and a silencer tube 109. The outer wall of the silencer plate 106 is provided with first silencer holes 108 connecting the two sides of the silencer plate 106. The silencer tube 109 is fixedly connected to the input cavity 101 and wraps the port position of the throttle hole 103. The outer wall of the silencer tube 109 is provided with second silencer holes 110 connecting the inner and outer sides of the silencer tube 109. The inner diameters of the first silencer hole 108 and the silencer tube 109 gradually increase along the flow direction of the fluid flow. By using the silencer plate 106 to cooperate with the first silencer hole 108 thereon and the silencer tube 109 to cooperate with the second silencer hole 110 thereon, the fluid can flow in the first silencer hole 108 and the second silencer hole 110. The flow velocity of the fluid can be reduced when the fluid flows in the first silencer hole 108 and the second silencer hole 110, thereby reducing the operating noise of the pressure reducing valve, achieving the purpose of double noise reduction, and improving the noise reduction and silencing effect.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-spring controlled noise reduction pressure reducing valve, comprising a valve body (100), a valve core (104) slidably connected to the inside of the valve body (100), and an actuator (200) for driving the valve core (104) to move vertically to change the throttling area in the valve body (100), characterized in that: The actuator (200) comprises: An outer shell (201), wherein a pressure chamber communicating with the upper side is provided inside the outer shell (201), and a medium input connector (205) for assisting medium to enter the pressure chamber is fixedly connected to the top of the outer shell (201); A pressure piston (202), wherein a side of the pressure piston (202) close to the medium input connector (205) is spherical, and a sealing ring (203) is fixedly connected to the outer peripheral wall of the pressure piston (202) and is in sealing contact with the inner wall of the pressure chamber; A pressure supply mechanism is provided between the outer shell (201) and the valve core (104), and the pressure supply mechanism provides resistance for the sealing ring (203) so that the sealing ring (203) is driven to drive the valve core (104) to move, and a corresponding pressure value needs to be provided.

2. A double spring controlled noise reducing pressure reducing valve according to claim 1, characterized in that: An input chamber (101) and an output chamber (102) are arranged opposite to each other on both sides of the valve body (100); a throttle hole (103) connecting the input chamber (101) and the output chamber (102) is arranged between the input chamber (101) and the output chamber (102) and directly below the valve core (104); A valve stem (105) is fixedly connected to the side of the valve core (104) facing away from the throttle hole (103), and a stabilizer (300) is fixedly provided between the valve body (100) and the pressure supply mechanism. The stabilizer (300) comprises: A hollow shell (301), wherein the hollow shell (301) is a cavity structure, and the top of the valve stem (105) sequentially passes through the valve body (100) and the hollow shell (301) and extends to an upper position; A connecting slide (302), the connecting slide (302) being slidably connected in the cavity of the hollow shell (301), and the connecting slide (302) being fixedly connected to the outer wall of the valve stem (105); A stabilizing spring (303), wherein the stabilizing spring (303) is movably sleeved on the outer wall of the valve stem (105), and the stabilizing spring (303) is fixedly connected between the connecting slide seat (302) and the bottom of the cavity of the hollow shell (301), and the stabilizing spring (303) is used to guide the valve stem (105) to move stably.

3. A double spring controlled noise reducing pressure reducing valve according to claim 1, characterized in that: The pressure supply mechanism comprises: A pressure regulating spring (207), wherein an upper spring seat (206) is provided at the top of the pressure regulating spring (207), and a piston rod (204) is fixedly connected between the upper spring seat (206) and the pressure piston (202); An externally threaded tube (209), the externally threaded tube (209) being a hollow structure with two ends connected, the top of the valve stem (105) passing through the inner cavity of the externally threaded tube (209) and being fixedly connected to the upper spring seat (206); A pressure regulating nut (208), the pressure regulating nut (208) being threadedly connected to the outer wall of the externally threaded tube (209) and supporting the bottom of the pressure regulating spring (207), the pressure regulating nut (208) being used to adjust the initial compression amount of the pressure regulating spring (207); Support columns (210), wherein there are at least two support columns (210) distributed at intervals between the actuator (200) and the stabilizer (300), and the support columns (210) are used for fixed support of the outer shell (201).

4. A double-spring controlled noise reduction pressure reducing valve according to claim 3, characterized in that: A display mechanism for displaying the adjustment amount of the pressure regulating nut (208) is provided between the outer shell (201) and the pressure regulating nut (208), and the display mechanism comprises: An outer scale ring (211), the outer scale ring (211) being an inner toothed ring structure with scale lines on the outer peripheral wall, and the outer scale ring (211) being rotatably connected to the bottom end of the outer shell (201); A driving column (215), wherein the bottom of the driving column (215) is round-headed and rotatably connected to a ball (218), and the bottom of the driving column (215) is movably fitted with the top of the pressure regulating nut (208) via the ball (218); An enlarging gear (213), the enlarging gear (213) being meshingly connected to the inner wall of the outer scale ring (211), the enlarging gear (213) being used to drive the outer scale ring (211) to rotate; A reversing transmission member is disposed between the driving column (215) and the enlarging gear (213), and is used to convert the thrust provided by the vertical movement of the driving column (215) into a rotational force that drives the enlarging gear (213) to rotate.

5. A double spring controlled noise reducing pressure reducing valve according to claim 4, characterized in that: The reversing transmission member comprises: A rotating tube (212), the top of the rotating tube (212) being fixedly connected to the enlarged gear (213), the top of the driving column (215) extending to the inner cavity of the rotating tube (212), the middle of the rotating tube (212) being rotatably connected to a first horn frame (214), and the two ends of the first horn frame (214) being fixedly connected to the outer walls of the two support columns (210) respectively; A spiral channel (219) is provided on the inner wall of the rotating tube (212); a driving protrusion (220) is fixedly connected to the outer wall of the driving column (215); and an end of the driving protrusion (220) extends into the spiral channel (219).

6. A double spring controlled noise reducing pressure reducing valve according to claim 3, characterized in that: A second horn frame (221) fixed to the outer walls of the two support columns (210) is provided below the first horn frame (214); a transmission through hole matched with the driving column (215) is provided in the middle of the second horn frame (221); a guide protrusion (217) is fixedly connected to the inner wall of the transmission through hole of the second horn frame (221); a linear guide groove (216) is provided on the outer wall of the driving column (215); and an end of the guide protrusion (217) is slidably connected to the inner wall of the linear guide groove (216).

7. A double spring controlled noise reducing pressure reducing valve according to claim 6, characterized in that: An internal threaded hole (281) adapted to the external threaded tube (209) is provided in the middle of the pressure regulating nut (208); an internal tooth groove (282) is provided on a side of the pressure regulating nut (208) away from the pressure regulating spring (207); an auxiliary slot (283) is provided on a side wall of the pressure regulating nut (208); a positioning mechanism is provided at the bottom end of the manual rod (228); a lifting spring (236) is fixedly connected between the positioning mechanism and the stabilizer (300); the lifting spring (236) is used to provide thrust for the positioning mechanism to engage with the internal tooth groove (282) on the pressure regulating nut (208).

8. A double spring controlled noise reducing pressure reducing valve according to claim 7, characterized in that: The positioning mechanism comprises: An anti-vibration seat (222), wherein the inner cavity of the anti-vibration seat (222) is provided with a lifting cavity (223) and a rotating cavity (224) in sequence from top to bottom, and a connecting groove (225) communicating with the lifting cavity (223) is provided at the top end of the anti-vibration seat (222); A special-shaped lifting seat (230), the special-shaped lifting seat (230) being located in the lifting cavity (223) and being movable along the axial direction of the anti-vibration seat (222), an incomplete tooth ring (233) matching the connecting through groove (225) being fixedly connected to a side of the special-shaped lifting seat (230) away from the rotating cavity (224), a conical through groove (231) being provided at the bottom of the special-shaped lifting seat (230), and an outer peripheral wall of the incomplete tooth ring (233) being in a sawtooth shape matching the inner tooth groove (282); A rotating seat (226), the rotating seat (226) being located in the rotating cavity (224) and being able to rotate radially along the anti-vibration seat (222), a round head protrusion (227) being fixedly connected to the top of the rotating seat (226) and located directly below the conical through groove (231), a manual rod (228) being fixedly connected to the outer peripheral wall of the rotating seat (226), a toggle slot (229) being provided on the outer peripheral wall of the anti-vibration seat (222), and an end of the manual rod (228) extending to the outside of the toggle slot (229).

9. A double-spring controlled noise reduction pressure reducing valve according to claim 8, characterized in that: The outer wall of the special-shaped lifting seat (230) is integrally formed with a column portion (232); the shape of the lifting chamber (223) matches the shape of the combination of the special-shaped lifting seat (230) and the column portion (232); the outer wall of the anti-vibration seat (222) is fixedly connected with a connecting sleeve (235); and the connecting sleeve (235) is slidably sleeved on the outer wall of the support column (210).

10. A double spring controlled noise reducing pressure reducing valve according to claim 2, characterized in that: A noise reduction mechanism is provided in the input cavity (101), and the noise reduction mechanism comprises: A silencer plate (106), wherein the outer wall of the silencer plate (106) is provided with first silencer holes (108) connecting two sides of the silencer plate (106); A silencer (109), the silencer (109) being fixedly connected to the input chamber (101) and covering the port position of the throttling hole (103), the outer wall of the silencer (109) being provided with second silencer holes (110) connecting the inside and outside of the silencer (109), and the inner diameters of the first silencer holes (108) and the silencer (109) gradually increasing along the flow direction of the fluid flow.

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