A pressure reducing valve

Abstract

The present invention discloses a pressure reducing valve, which relates to the technical field of control valves, including a valve housing, and also including a pressure regulating component installed inside the valve housing, a pressure reducing component, and a pressure control component matched with the pressure reducing component; the pressure reducing component is used to reduce the pressure of the fluid inside the valve housing and reduce the fluid outflow pressure, and the pressure regulating component is the first way to adjust the pressure reduction degree of the fluid inside the valve housing, and cooperates with the pressure reducing component to ensure that the pressure of the fluid outflow from the valve housing is constant. The advantage is that when the present invention is reducing the pressure of the fluid, it not only uses two pressure reducing degree adjustment methods to adjust the pressure reduction degree, so that the adjustment of the pressure reduction degree is more accurate and timely, and the adjustment accuracy is higher, but also cooperates with the unloading mechanism to relieve the pressure of the fluid pulse generated inside the valve housing, so that the fluid pressure at the outlet of the valve housing is more stable, and the influence of the fluid pulse on the pressure reducing effect is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of control valves, and in particular to a pressure reducing valve. Background Art

[0002] A pressure reducing valve is a control valve used to reduce and control fluid pressure. Its main function is to reduce high-pressure fluid to the required lower pressure, thereby ensuring the safe operation of downstream equipment and avoiding equipment damage or improper operation due to excessive pressure.

[0003] The existing pressure reducing valves include spring pressure reducing valves and electromagnetic pressure reducing valves. The electromagnetic pressure reducing valve replaces the spring in the spring pressure reducing valve, and is more sensitive to reaction and more accurate in pressure regulation. The publication number CN116583807A discloses a pressure reducing valve, which includes a valve carrier having at least one flow-through channel and a pot-shaped valve body, which can be guided on a guide pin protruding into the interior of the pot of the valve body to move from an open position to a closed position against a restoring force. The valve body, which is movably guided on the guide pin of the valve carrier and has a pot-shaped structure, can move on the guide pin according to the water pressure existing on the outflow side of the pressure reducing valve to overcome the restoring force of at least one restoring element, so that the opening cross section of the at least one channel opening is changed or completely closed when necessary. In the closed position of the pressure reducing valve according to the present invention, the valve body with its pot-shaped circumferential edge abuts against a valve seat arranged on the valve carrier, so that the valve body closes at least one channel opening of the at least one flow-through channel.

[0004] The above-mentioned pressure reducing valve and the existing pressure reducing valve directly change the pressure reducing degree of the pressure reducing valve by adjusting the distance between the two electromagnets or adjusting the magnetic force of the electromagnets when reducing pressure. The adjustment range is limited and there are certain limitations in use. In addition, once the fluid in the pipeline fluctuates, the pressure reducing adjustment cannot respond quickly and in time. At this time, the pulse generated by the fluctuation will directly affect the pressure at the outlet of the pressure reducing valve, and the expected pressure reducing effect cannot be achieved. It is greatly affected by the fluid fluctuation.

[0005] Therefore, a novel pressure reducing valve can be adopted to solve the shortcomings of the prior art. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art that the pressure regulating range is limited and the pressure is greatly affected by fluid fluctuations, and to propose a pressure reducing valve.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A pressure reducing valve comprises a valve housing, a pressure regulating assembly, a pressure reducing assembly and a pressure control assembly matched with the pressure reducing assembly installed inside the valve housing; The pressure reducing assembly is used to reduce the pressure of the fluid inside the valve housing and lower the fluid outflow pressure. The pressure regulating assembly is a first method for adjusting the degree of pressure reduction of the fluid inside the valve housing, and cooperates with the pressure reducing assembly to ensure that the pressure of the fluid outflowing from the valve housing is constant. The pressure control assembly is a second method for adjusting the degree of pressure reduction of the fluid inside the valve housing and cooperates with the pressure reducing assembly.

[0008] Preferably, the decompression assembly comprises a partition fixedly mounted inside the valve housing, a sliding rod is slidably mounted on the partition, a piston disc is fixedly mounted on the sliding rod, hydraulic oil is filled between the partition and the piston disc, and the piston disc and the valve housing are in a sealed sliding connection; A decompression shell is fixedly installed on the valve shell, a sealing shell is fixedly installed on the bottom of the decompression shell, a sealing sleeve is fixedly installed between the decompression shell and the valve shell, the sliding rod and the sealing sleeve are slidably connected, a connecting rod is fixedly installed on the end of the sliding rod away from the piston disk, and a sealing disk that can cooperate with the bottom of the sealing shell is fixedly installed on the end of the connecting rod away from the sliding rod, a plurality of water inlet holes are opened on the decompression shell, and a force unloading mechanism is installed in each of the water inlet holes.

[0009] Preferably, the unloading mechanism includes a unloading box fixedly mounted on the pressure reducing shell, a water retaining sheet fixedly mounted on the unloading box, the water retaining sheet is annular, located outside the circular cylinder body, and has a gap between the circular cylinder body and the circular cylinder body for fluid to pass through, the unloading box is annular, and its end face is U-shaped in cross-section, a circular cylinder body is fixedly mounted on the inner ring of the unloading box, a unloading baffle is slidably mounted in the circular cylinder body, a permanent magnet that cooperates with each other is fixedly mounted on the unloading baffle and the circular cylinder body, a plurality of water outlet holes are opened on the circular cylinder body, and a first pressure relief structure and a second pressure relief structure are mounted on the unloading box.

[0010] Preferably, the first pressure relief structure includes a plurality of fixed plates fixedly mounted on the water retaining sheet, each of the fixed plates is rotatably mounted with an elastic telescopic water retaining plate that matches the corresponding water outlet hole, an annular cylinder body is fixedly mounted on the outside of the circular cylinder body, a piston ring is slidably mounted in the annular cylinder body, a plurality of first elastic telescopic rods are fixedly mounted between the piston ring and the annular cylinder body, a plurality of support rods are fixedly mounted on the piston ring, and each of the elastic telescopic water retaining plates is rotatably connected to the corresponding support rod.

[0011] Preferably, the second pressure relief structure includes two annular fixing plates fixedly installed at the opening of the force unloading box, a gap is left between the two annular fixing plates, an open rubber ring is fixedly installed between the two annular fixing plates, a plurality of reset support components matching the open rubber ring are installed in the force unloading box, a plurality of conical baffles are fixedly installed on the two annular fixing plates, each of the conical baffles is aligned with the corresponding elastic telescopic water baffle, and the force unloading box is connected to the annular cylinder body through an air guide pipe.

[0012] Preferably, the reset support component includes a fixed block fixedly installed inside the force unloading box, an arc-shaped storage box is installed on the fixed block via a second elastic telescopic rod, two sliding plates are slidably installed in the arc-shaped storage box, a support sheet is fixedly installed on each of the two sliding plates, the two support sheets are fixedly connected to the corresponding annular fixed plates, and an arc-shaped reset spring is fixedly installed between the two sliding plates.

[0013] Preferably, the pressure regulating assembly includes an adjusting cylinder body fixedly mounted inside the valve housing, the adjusting cylinder body being located on a side of the piston disc away from the sliding rod, an adjusting knob matching the adjusting cylinder body being fixedly mounted on the top of the valve housing, an oil guide pipe being fixedly connected to the adjusting cylinder body, the interior of the adjusting cylinder body being filled with hydraulic oil, and an end of the oil guide pipe away from the adjusting cylinder body passing through the valve housing and extending between the piston disc and the partition.

[0014] Preferably, the pressure control assembly includes a metal bent pipe fixedly mounted on the outside of the valve housing, the metal bent pipe is fixedly connected to an adjusting cylinder, a piston column is slidably mounted in the adjusting cylinder, a magnetic plate is fixedly mounted on the piston column, a battery pack is fixedly mounted on the top of the adjusting cylinder, an electromagnet matching the magnetic plate is fixedly mounted on the bottom of the battery pack, the electromagnet is located inside the adjusting cylinder, and a voltage regulator is fixedly mounted on the battery pack for adjusting the magnetic force of the electromagnet.

[0015] Preferably, a pressure gauge is fixedly mounted on the valve housing for detecting the fluid pressure when the fluid flows out of the valve housing, and a sensor matched with the pressure gauge is fixedly mounted on the battery pack, and the sensor is used to control the operation of the voltage regulator.

[0016] Preferably, a filter element is fixedly installed inside the valve housing, and the filter element is located at the water inlet position inside the valve housing, and is used to filter impurities in the fluid inside the valve housing.

[0017] Compared with the prior art, the present invention has the following advantages: 1. When the pressure reducing valve is reducing the fluid pressure, the internal pressure of the regulating cylinder is changed by adjusting the regulating knob in the pressure regulating assembly, thereby changing the pressure of the hydraulic oil between the partition and the piston disc. The hydraulic oil between the partition and the piston disc will enter the regulating cylinder through the metal elbow, so that the position of the piston column in the regulating cylinder changes. At this time, the hydraulic oil pressure between the partition and the piston disc is constant, so as to change the position of the magnetic plate, thereby adjusting the distance between the magnetic plate and the electromagnet, so as to achieve the purpose of changing the pressure reduction degree for the first time, and cooperate with the voltage regulator to change the repulsive force between the electromagnet and the magnetic plate, so as to achieve the purpose of changing the pressure reduction degree for the second time. Through two different pressure reducing operations, the pressure reduction range can be adjusted to a larger extent and the pressure reduction degree can be adjusted to a more precise extent.

[0018] 2. When the pressure reducing valve is reducing the fluid pressure, a force unloading mechanism is provided and a movable force unloading baffle in the force unloading mechanism is used to unload the pulses generated by the fluid, thereby reducing the influence of the pulses on the fluid pressure at the valve housing outlet, and making the fluid pressure at the valve housing outlet more stable.

[0019] 3. When the pressure reducing valve is reducing the fluid pressure, the elastic telescopic water baffle in the first pressure relief structure is used to block the pulse water sprayed from the water outlet. The elastic telescopic water baffle is designed to be inclined. The water sprayed from the water outlet will impact on the inclined elastic telescopic water baffle, offsetting part of the impact force, thereby weakening the pulse energy, which is conducive to stabilizing the outlet pressure.

[0020] 4. When the pressure reducing valve is reducing the fluid pressure, the pulse water is further relieved by the deformation of the open rubber ring in the second pressure relief structure. The deformation of the open rubber ring squeezes the air in the force relief box into the annular cylinder through the air guide pipe, so that the piston ring moves. The movement of the piston ring changes the inclination angle of the elastic telescopic water baffle plate to offset the pulse water of different degrees. At the same time, it also deforms the water baffle sheet, changes the water outlet size of the water baffle sheet, and changes the water outlet pressure, thereby achieving the purpose of further pressure relief.

[0021] To sum up, when the present invention is performing fluid decompression, it not only adopts two decompression adjustment methods to adjust the decompression degree, making the adjustment of the decompression degree more accurate and timely, and the adjustment accuracy is higher, but also cooperates with the unloading mechanism to relieve the pressure of the fluid pulse generated inside the valve housing, so that the fluid pressure at the outlet of the valve housing is more stable, reducing the influence of the fluid pulse on the decompression effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 This is a structural schematic diagram of a pressure reducing valve proposed by the present invention; Figure 2 for Figure 1A schematic detailed view of the plan structure along one of the angles; Figure 3 for Figure 2 Detailed schematic diagram of the three-dimensional structure along the AA section; Figure 4 for Figure 3 A detailed diagram of the enlarged structure of the pressure control assembly, the pressure regulating assembly and the pressure reducing assembly; Figure 5 for Figure 4 A schematic detailed diagram of the structure after the pressure reducing housing and the sealing housing are removed and the pressure control assembly is cut open; Figure 6 for Figure 4 An enlarged structural schematic diagram of the decompression housing, the sealing housing and other internal components; Figure 7 for Figure 6 A schematic detailed view of the plan structure along one of the angles; Figure 8 for Figure 7 Detailed schematic diagram of the three-dimensional structure along the BB section; Fig. 9 for Figure 8 Detailed schematic diagram of the structure after being rotated to a certain angle; Fig.10 for Fig. 9 An enlarged structural schematic diagram of the intermediate unloading mechanism; Fig.11 for Fig.10 A schematic detailed view of the plan structure along one of the angles; Fig.12 for Fig.11 Detailed schematic diagram of the three-dimensional structure along the CC section; Fig.13 for Fig.12 Detailed schematic diagram of the structure after being rotated to a certain angle; Fig.14 for Fig.13 The enlarged structural schematic detail diagram of the D part; Fig.15 for Fig.12 Detailed schematic diagram of the exploded structure; Fig.16 for Fig.12 A detailed diagram showing the enlarged structure of the middle opening rubber ring and its surrounding parts; Fig.17 for Fig.16 A schematic detailed diagram of the structure after removing the annular fixing plate and the conical baffle; Fig.18 for Fig.16 Detailed schematic diagram of the structure after being rotated to a certain angle; Fig.19 for Fig.18An enlarged structural schematic detail diagram of the middle reset support component; Fig. 20 for Fig.19 A schematic detailed view of the plan structure along one of the angles; Fig.21 for Fig. 20 Detailed schematic diagram of the three-dimensional structure along the EE section.

[0023] In the figure: 1. valve housing; 2. pressure gauge; 3. pressure control assembly; 4. filter element; 5. pressure regulating assembly; 6. pressure reducing assembly; 7. pressure reducing housing; 8. sealing housing; 9. piston disc; 10. partition; 11. oil guide pipe; 12. adjusting cylinder; 13. battery pack; 14. adjusting knob; 15. sliding rod; 16. connecting rod; 17. sealing disc; 18. sealing sleeve; 19. piston column; 20. electromagnet; 21. unloading mechanism; 22. round cylinder; 23. unloading box; 24 , water-retaining sheet; 25, unloading baffle; 26, permanent magnet; 27, annular cylinder; 28, piston ring; 29, first elastic telescopic rod; 30, support rod; 31, elastic telescopic water-retaining plate; 32, air guide tube; 33, open rubber ring; 34, annular fixing plate; 35, conical baffle; 36, reset support component; 37, fixing block; 38, second elastic telescopic rod; 39, arc-shaped storage box; 40, supporting sheet; 41, sliding plate; 42, reset spring; 43, water outlet. DETAILED DESCRIPTION

[0024] 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.

[0025] Example 1: Reference Figure 1-Figure 3 A pressure reducing valve comprises a valve housing 1, a pressure regulating assembly 5, a pressure reducing assembly 6 and a pressure control assembly 3 matched with the pressure reducing assembly 6 which are installed inside the valve housing 1.

[0026] A filter element 4 is fixedly installed inside the valve housing 1. The filter element 4 is located at the water inlet position inside the valve housing 1 and is used to filter impurities in the fluid inside the valve housing 1, reduce the impact of impurities in the fluid on pressure reduction, extend the service life of the pressure reducing valve, and also facilitate the precise control of the pressure reducing valve.

[0027] A pressure gauge 2 is fixedly mounted on the valve housing 1 to detect the fluid pressure when the fluid inside the valve housing 1 flows out; like Figure 3As shown, the fluid enters the pressure reducing valve from the left side, then enters the pressure reducing assembly 6 after being filtered by the filter element 4, and then is discharged from the right side of the pressure reducing valve after being decompressed by the pressure reducing assembly 6. When the fluid is discharged, the pressure at the time of discharge will be detected by the pressure gauge 2 to ensure that the discharge pressure is constant and reduce damage to downstream equipment.

[0028] Embodiment 2: This embodiment is different from the embodiment 1 in that: Figure 3-Figure 21 The pressure reducing assembly 6 is used to reduce the pressure of the fluid inside the valve housing 1 and lower the outflow pressure of the fluid.

[0029] The pressure reducing assembly 6 comprises a partition 10 fixedly mounted inside the valve housing 1, a sliding rod 15 is slidably mounted on the partition 10, a piston disc 9 is fixedly mounted on the sliding rod 15, hydraulic oil is filled between the partition 10 and the piston disc 9, and the piston disc 9 and the valve housing 1 are in a sealed sliding connection; A pressure reducing housing 7 is fixedly mounted on the valve housing 1, a sealing housing 8 is fixedly mounted on the bottom of the pressure reducing housing 7, a sealing sleeve 18 is fixedly mounted between the pressure reducing housing 7 and the valve housing 1, the sliding rod 15 and the sealing sleeve 18 are slidingly connected, a connecting rod 16 is fixedly mounted on the end of the sliding rod 15 away from the piston disc 9, a sealing disc 17 that can cooperate with the bottom of the sealing housing 8 is fixedly mounted on the end of the connecting rod 16 away from the sliding rod 15, and a plurality of water inlet holes are opened on the pressure reducing housing 7, and a force unloading mechanism 21 is installed in each water inlet hole.

[0030] When the fluid is unloaded by the unloading mechanism 21 (mainly to unload the pulse in the fluid, if there is no pulse, the unloading mechanism 21 will operate stably, and the fluid pressure passing through the unloading mechanism 21 is constant), it enters the decompression housing 7, and the fluid in the decompression housing 7 will press the blocking disk 17 downward, so that the blocking disk 17 is separated from the sealing shell 8. At this time, the blocking disk 17 moves downward (here, the upper and lower references are made). Figure 5 as well as Figure 8 ); The downward movement of the sealing disk 17 drives the sliding rod 15 downward, thereby driving the piston disk 9 downward. The downward movement of the piston disk 9 will squeeze the hydraulic oil between the partition 10 and the piston disk 9 into the pressure control component 3, and the hydraulic oil will be elastically relieved through the pressure control component 3. At this time, if the fluid entering the decompression housing 7 wants to push the sealing disk 17 to flow out of the sealing shell 8, the fluid pressure in the decompression housing 7 needs to be greater than the elastic force of the pressure control component 3. The part of the pressure that exceeds the elastic force of the pressure control component 3 will separate the sealing disk 17 from the sealing shell 8. The pressure after decompression is the difference between the fluid pressure in the decompression housing 7 and the elastic force of the pressure control component 3.

[0031] The unloading mechanism 21 includes an unloading box 23 fixedly mounted on the pressure reducing housing 7, and a water retaining sheet 24 is fixedly mounted on the unloading box 23 (the water retaining sheet 24 is a deformable metal sheet, which will be deformed under the pressure force, from the previous cylindrical shape to a conical cylindrical shape, the fluid outlet size is enlarged, and the fluid pressure is reduced). The water retaining sheet 24 is annular and is located outside the circular cylinder body 22, and there is a gap between the circular cylinder body 22 for the fluid to pass through. The unloading box 23 is annular, and its end face is U-shaped. The inner ring of the unloading box 23 is fixedly mounted with the circular cylinder body 22, and a unloading baffle plate 25 is slidably mounted in the circular cylinder body 22. A permanent magnet 26 that cooperates with each other is fixedly mounted on the unloading baffle plate 25 and the circular cylinder body 22. A plurality of water outlet holes 43 are provided on the circular cylinder body 22, and a first pressure relief structure and a second pressure relief structure are installed on the unloading box 23.

[0032] When the fluid in the valve housing 1 generates a pulse, the fluid in the valve housing 1 will impact the unloading baffle 25, causing the unloading baffle 25 to slide in the circular cylinder body 22. Friction occurs between the unloading baffle 25 and the circular cylinder body 22. The movement of the unloading baffle 25 will convert part of the impact kinetic energy into friction internal energy, thereby achieving the purpose of unloading. The unloading baffle 25 is then reset by the permanent magnet 26. The fluid after unloading through the unloading baffle 25 will enter the water retaining sheet 24 through the water outlet 43, thereby completing the initial unloading operation and weakening the fluid pulse.

[0033] The first pressure relief structure includes a plurality of fixed plates fixedly mounted on the water retaining sheet 24, each of which is rotatably mounted with an elastic telescopic water retaining plate 31 that matches the corresponding water outlet hole 43, an annular cylinder body 27 is fixedly mounted on the outside of the circular cylinder body 22, a piston ring 28 is slidably mounted inside the annular cylinder body 27, a plurality of first elastic telescopic rods 29 are fixedly mounted between the piston ring 28 and the annular cylinder body 27, a plurality of support rods 30 are fixedly mounted on the piston ring 28, and each elastic telescopic water retaining plate 31 is rotatably connected to the corresponding support rod 30.

[0034] When the fluid is ejected from the water outlet 43 and enters the water retaining sheet 24, it will directly spray and impact on the elastic telescopic water retaining plate 31. Since the elastic telescopic water retaining plate 31 is designed to be inclined, part of the fluid impact kinetic energy will be offset, while the horizontal kinetic energy will be retained. After the elastic telescopic water retaining plate 31 unloads the force, the fluid flows horizontally, and the pulse fluid is depressurized to reduce the pressure of the pulse fluid.

[0035] The second pressure relief structure includes two annular fixing plates 34 fixedly mounted at the opening of the force relief box 23, with a gap between the two annular fixing plates 34, an open rubber ring 33 fixedly mounted between the two annular fixing plates 34, and a plurality of reset support components 36 matched with the open rubber ring 33 are installed in the force relief box 23; The reset support component 36 includes a fixed block 37 fixedly installed inside the force unloading box 23, an arc-shaped storage box 39 is installed on the fixed block 37 through a second elastic telescopic rod 38, two sliding plates 41 are slidably installed in the arc-shaped storage box 39, and a support sheet 40 is fixedly installed on each of the two sliding plates 41. The two support sheets 40 are fixedly connected to the corresponding annular fixed plates 34, and an arc-shaped reset spring 42 is fixedly installed between the two sliding plates 41.

[0036] After being decompressed by the first decompression structure, the pulse fluid flows horizontally toward the side close to the open rubber ring 33, passes through the two annular fixing plates 34 and enters the open rubber ring 33, causing the open rubber ring 33 to deform and expand. At this time, the pulse kinetic energy of the fluid will be converted into deformable energy, eliminating the pulse kinetic energy, which is used to further decompress the pulse fluid.

[0037] When the open rubber ring 33 is deformed, it will squeeze the second elastic telescopic rod 38 for compression. At this time, the supporting sheet 40 will be deformed, but the supporting sheet 40 will always fit the outer wall of the open rubber ring 33 to support the open rubber ring 33 and prevent the open rubber ring 33 from collapsing downward under the action of the gravity of the pulse fluid. This ensures that all fluids entering the open rubber ring 33 can be discharged smoothly.

[0038] A plurality of conical baffles 35 are fixedly mounted on the two annular fixing plates 34 , and each conical baffle 35 is aligned with the corresponding elastic retractable water baffle 31 . The unloading box 23 and the annular cylinder body 27 are connected via an air guide pipe 32 .

[0039] The function of the conical baffle plate 35 is to divert the pulse fluid after the force is unloaded by the elastic telescopic water baffle plate 31. It can not only offset part of the pulse energy, but also prevent the pulse fluid from being affected by the horizontal pulse fluid on the elastic telescopic water baffle plate 31 when it is discharged from the open rubber ring 33, thereby ensuring smooth discharge of the fluid after unloading.

[0040] As the open rubber ring 33 expands and deforms, the space in the unloading box 23 is compressed, and the air in the unloading box 23 is discharged into the annular cylinder 27 through the air guide pipe 32, so that the piston ring 28 in the annular cylinder 27 moves. The movement of the piston ring 28 changes the inclination angle of the elastic telescopic water baffle 31 to offset the pulse fluid of different degrees. At the same time, it also deforms the water baffle sheet 24, changes the size of the water outlet of the water baffle sheet 24, and changes the water outlet pressure, thereby achieving the purpose of further pressure relief.

[0041] Embodiment 3: This embodiment is different from the technical solution of Embodiment 2 in that: Figure 3-Figure 5 The pressure regulating assembly 5 is a first method for regulating the degree of decompression of the fluid inside the valve housing 1 , and cooperates with the decompression assembly 6 to ensure that the pressure of the fluid flowing out of the valve housing 1 is constant.

[0042] The pressure regulating assembly 5 includes an adjusting cylinder 12 fixedly installed inside the valve housing 1. The adjusting cylinder 12 is located on the side of the piston disc 9 away from the sliding rod 15. An adjusting knob 14 matching the adjusting cylinder 12 is fixedly installed on the top of the valve housing 1. An oil guide pipe 11 is fixedly connected to the adjusting cylinder 12. The inside of the adjusting cylinder 12 is filled with hydraulic oil. One end of the oil guide pipe 11 away from the adjusting cylinder 12 passes through the valve housing 1 and extends between the piston disc 9 and the partition 10.

[0043] The first use of the pressure regulating assembly 5: With the use of the pressurizing valve, the hydraulic oil between the partition 10 and the piston disc 9 in the pressure reducing valve will be consumed. At this time, the hydraulic oil in the regulating cylinder 12 is filled into the space between the partition 10 and the piston disc 9 by adjusting the knob 14, so as to replenish the hydraulic oil between the partition 10 and the piston disc 9 (the adjusting knob 14 is not a common regulating structure, and there is a piston inside the regulating cylinder 12. The position of the piston in the regulating cylinder 12 is changed by adjusting the knob 14 to press the hydraulic oil in the regulating cylinder 12 into the space between the partition 10 and the piston disc 9); Embodiment 4: This embodiment is different from the technical solution of embodiment 3 in that: Figure 3-Figure 5 The pressure control component 3 is a second way to adjust the degree of decompression of the fluid inside the valve housing 1 , and cooperates with the decompression component 6 .

[0044] The pressure control assembly 3 includes a metal elbow fixedly mounted on the outside of the valve housing 1, an adjusting cylinder fixedly connected to the metal elbow, a piston column 19 slidably mounted in the adjusting cylinder, a magnetic plate fixedly mounted on the piston column 19, a battery pack 13 fixedly mounted on the top of the adjusting cylinder, an electromagnet 20 matched with the magnetic plate fixedly mounted on the bottom of the battery pack 13, the electromagnet 20 is located inside the adjusting cylinder, and a voltage regulator fixedly mounted on the battery pack 13 for adjusting the magnetic force of the electromagnet 20.

[0045] The second use of the pressure regulating assembly 5 is to fill the hydraulic oil in the regulating cylinder 12 into the space between the partition 10 and the piston disc 9 when the hydraulic oil is not consumed. At this time, the hydraulic oil in the space between the partition 10 and the piston disc 9 increases, and the hydraulic oil is introduced into the regulating cylinder through the metal elbow, so that the height of the piston column 19 in the regulating cylinder is increased. At this time, the distance between the magnetic plate and the electromagnet 20 is reduced, and the repulsive force is increased, so that a greater degree of decompression operation can be performed; A sensor matched with the pressure gauge 2 is fixedly mounted on the battery pack 13 , and the sensor is used to control the operation of the voltage regulator.

[0046] The purpose of the pressure control component 3: after the pressure gauge 2 detects the outlet pressure, the sensor will be used to control the operation of the voltage regulator to change the magnetic force of the electromagnet 20, thereby also changing the repulsive force between the electromagnet 20 and the magnetic plate, which is used to adjust the range of the decompression degree; As the decompression proceeds, the movement of the piston disc 9 will squeeze the hydraulic oil into the adjusting cylinder, causing the piston column 19 to move. The movement of the piston column 19 will change the distance between the magnetic plate and the electromagnet 20. The repulsive force between the magnetic plate and the electromagnet 20 can generate resistance to the piston column 19 for the decompression operation.

[0047] The specific operation steps of this device are as follows: The fluid enters the pressure reducing valve from the left side, then enters the pressure reducing assembly 6 after being filtered by the filter element 4, and then is discharged from the right side of the pressure reducing valve after being decompressed by the pressure reducing assembly 6; When the fluid generates a pulse, the fluid in the valve housing 1 will impact the unloading baffle 25, causing the unloading baffle 25 to slide in the circular cylinder 22. There is friction between the unloading baffle 25 and the circular cylinder 22. The movement of the unloading baffle 25 will convert part of the impact kinetic energy into friction internal energy, thereby achieving the purpose of unloading. Then, the unloading baffle 25 is reset by the permanent magnet 26. The fluid after unloading the unloading baffle 25 will enter the water retaining sheet 24 through the water outlet 43, thereby completing the initial unloading operation and weakening the fluid pulse. After the fluid is ejected from the water outlet 43 and enters the water retaining sheet 24, it will directly spray and impact on the elastic telescopic water retaining plate 31. Since the elastic telescopic water retaining plate 31 is designed to be inclined, part of the fluid impact kinetic energy will be offset, while the horizontal kinetic energy will be retained. After the elastic telescopic water retaining plate 31 unloads the force, the fluid will flow horizontally, and the pulse fluid will be depressurized to reduce the pressure of the pulse fluid. Subsequently, the pulse fluid flows horizontally toward the side close to the open rubber ring 33, passes through the two annular fixing plates 34 and enters the open rubber ring 33, causing the open rubber ring 33 to deform and expand. At this time, the pulse kinetic energy of the fluid will be converted into deformation energy, eliminating the pulse kinetic energy, which is used to further relieve the pressure of the pulse fluid. As the open rubber ring 33 expands and deforms, the space in the unloading box 23 is compressed, and the air in the unloading box 23 is discharged into the annular cylinder 27 through the air guide pipe 32, so that the piston ring 28 in the annular cylinder 27 moves. The movement of the piston ring 28 changes the inclination angle of the elastic telescopic water baffle 31 to offset the pulse fluid of different degrees. At the same time, it also deforms the water baffle sheet 24, changes the size of the water outlet of the water baffle sheet 24, and changes the water outlet pressure.

[0048] When the fluid is unloaded by the unloading mechanism 21 and enters the decompression housing 7, the fluid in the decompression housing 7 will press the blocking disk 17 downward, so that the blocking disk 17 is separated from the sealing shell 8, and the blocking disk 17 moves downward; The downward movement of the blocking plate 17 drives the sliding rod 15 to move downward, thereby driving the piston plate 9 to move downward. The downward movement of the piston plate 9 will squeeze the hydraulic oil between the partition plate 10 and the piston plate 9 into the adjusting cylinder, causing the piston column 19 to move. The movement of the piston column 19 will change the distance between the magnetic plate and the electromagnet 20. The repulsive force between the magnetic plate and the electromagnet 20 can generate resistance to the piston column 19, which is used for decompression operation. The fluid pressure after pressurization is: the pressure of the fluid entering minus the repulsive force between the electromagnet 20 and the magnetic plate.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure reducing valve, comprising a valve housing (1), characterized in that: It also includes a pressure regulating component (5), a pressure reducing component (6), and a pressure control component (3) matched with the pressure reducing component (6) installed inside the valve housing (1); The pressure reducing assembly (6) is used to reduce the pressure of the fluid inside the valve housing (1) to reduce the fluid outflow pressure. The pressure regulating assembly (5) is a first method for regulating the degree of pressure reduction of the fluid inside the valve housing (1) and cooperates with the pressure reducing assembly (6) to ensure that the pressure of the fluid outflowing from the valve housing (1) is constant. The pressure control assembly (3) is a second method for regulating the degree of pressure reduction of the fluid inside the valve housing (1) and cooperates with the pressure reducing assembly (6).

2. The pressure reducing valve according to claim 1, characterized in that: The pressure reducing assembly (6) comprises a partition (10) fixedly mounted inside the valve housing (1), a sliding rod (15) being slidably mounted on the partition (10), a piston disc (9) being fixedly mounted on the sliding rod (15), hydraulic oil being filled between the partition (10) and the piston disc (9), and a sealing sliding connection being formed between the piston disc (9) and the valve housing (1); A decompression housing (7) is fixedly mounted on the valve housing (1), a sealing housing (8) is fixedly mounted on the bottom of the decompression housing (7), a sealing sleeve (18) is fixedly mounted between the decompression housing (7) and the valve housing (1), the sliding rod (15) and the sealing sleeve (18) are slidably connected, a connecting rod (16) is fixedly mounted on the end of the sliding rod (15) away from the piston disc (9), and a sealing disc (17) that can cooperate with the bottom of the sealing housing (8) is fixedly mounted on the end of the connecting rod (16) away from the sliding rod (15), and a plurality of water inlet holes are opened on the decompression housing (7), and a force unloading mechanism (21) is installed in each of the water inlet holes.

3. The pressure reducing valve according to claim 2, characterized in that: The unloading mechanism (21) comprises an unloading box (23) fixedly mounted on the pressure reducing housing (7); a water retaining sheet (24) fixedly mounted on the unloading box (23); the water retaining sheet (24) is annular and located outside the circular cylinder body (22); a gap is formed between the water retaining sheet (24) and the circular cylinder body (22) for fluid to pass through; the unloading box (23) is annular and has a U-shaped end face in cross section; the circular cylinder body (22) is fixedly mounted on the inner ring of the unloading box (23); an unloading baffle plate (25) is slidably mounted in the circular cylinder body (22); a mutually cooperating permanent magnet (26) is fixedly mounted on the unloading baffle plate (25) and the circular cylinder body (22); a plurality of water outlet holes (43) are formed on the circular cylinder body (22); and a first pressure relief structure and a second pressure relief structure are mounted on the unloading box (23).

4. The pressure reducing valve according to claim 3, characterized in that: The first pressure relief structure comprises a plurality of fixed plates fixedly mounted on the water retaining sheet (24), each of the fixed plates having an elastically retractable water retaining plate (31) matched with a corresponding water outlet hole (43) rotatably mounted thereon, an annular cylinder body (27) fixedly mounted outside the circular cylinder body (22), a piston ring (28) slidably mounted inside the annular cylinder body (27), a plurality of first elastically retractable rods (29) fixedly mounted between the piston ring (28) and the annular cylinder body (27), a plurality of support rods (30) fixedly mounted on the piston ring (28), and each of the elastically retractable water retaining plates (31) is rotatably connected to the corresponding support rod (30).

5. The pressure reducing valve according to claim 4, characterized in that: The second pressure relief structure comprises two annular fixing plates (34) fixedly mounted at the opening of the force relief box (23), a gap being left between the two annular fixing plates (34), an open rubber ring (33) being fixedly mounted between the two annular fixing plates (34), a plurality of reset support components (36) matching the open rubber ring (33) being mounted in the force relief box (23), a plurality of conical baffles (35) being fixedly mounted on the two annular fixing plates (34), each of the conical baffles (35) being aligned with a corresponding elastic telescopic water baffle (31), and the force relief box (23) and the annular cylinder body (27) being connected via an air guide pipe (32).

6. The pressure reducing valve according to claim 5, characterized in that: The reset support component (36) comprises a fixed block (37) fixedly mounted inside the force unloading box (23); an arc-shaped storage box (39) is mounted on the fixed block (37) via a second elastic telescopic rod (38); two sliding plates (41) are slidably mounted inside the arc-shaped storage box (39); a support sheet (40) is fixedly mounted on each of the two sliding plates (41); the two support sheets (40) are fixedly connected to the corresponding annular fixed plates (34); and an arc-shaped reset spring (42) is fixedly mounted between the two sliding plates (41).

7. The pressure reducing valve according to claim 2, characterized in that: The pressure regulating assembly (5) comprises a regulating cylinder (12) fixedly mounted inside the valve housing (1); the regulating cylinder (12) is located on a side of the piston disc (9) away from the sliding rod (15); a regulating knob (14) matching the regulating cylinder (12) is fixedly mounted on the top of the valve housing (1); an oil guide pipe (11) is fixedly connected to the regulating cylinder (12); the regulating cylinder (12) is filled with hydraulic oil; an end of the oil guide pipe (11) away from the regulating cylinder (12) passes through the valve housing (1) and extends between the piston disc (9) and the partition (10).

8. The pressure reducing valve according to claim 7, characterized in that: The pressure control assembly (3) comprises a metal elbow fixedly mounted on the outside of the valve housing (1), the metal elbow being fixedly connected to an adjusting cylinder, a piston column (19) being slidably mounted in the adjusting cylinder, a magnetic plate being fixedly mounted on the piston column (19), a battery pack (13) being fixedly mounted on the top of the adjusting cylinder, an electromagnet (20) matching the magnetic plate being fixedly mounted on the bottom of the battery pack (13), the electromagnet (20) being located inside the adjusting cylinder, and a voltage regulator being fixedly mounted on the battery pack (13) for adjusting the magnetic force of the electromagnet (20).

9. The pressure reducing valve according to claim 8, characterized in that: A pressure gauge (2) is fixedly mounted on the valve housing (1) for detecting the fluid pressure when the fluid inside the valve housing (1) flows out; a sensor matched with the pressure gauge (2) is fixedly mounted on the battery pack (13); the sensor is used to control the operation of the voltage regulator.

10. The pressure reducing valve according to claim 1, characterized in that: A filter element (4) is fixedly installed inside the valve housing (1); the filter element (4) is located at a water inlet position inside the valve housing (1) and is used to filter impurities in the fluid inside the valve housing (1).

Images