Multifunctional pressure reducing valve

Abstract

The utility model belongs to the technical field of valves, and discloses a multifunctional pressure reducing valve. The multifunctional pressure reducing valve comprises a valve body, a pressure reducing assembly and a protection assembly, a flow channel is formed in the valve body, the pressure reducing assembly is arranged in the valve body and communicates with the flow channel, the protection assembly is arranged on the flow channel and comprises a shell and a piston structure, the piston structure is slidably arranged in the shell and divides the shell, one side of the piston structure communicates with the flow channel, and the other side of the piston structure communicates with the flow channel. The other side of the piston structure is separated from the flow channel and is matched with the shell to form a compressible cavity, a medium in the valve body is frozen and expanded, the piston structure can be pushed to move along the shell, the compressible cavity is compressed to absorb the expanded volume, and therefore the valve body and a pipeline are prevented from being damaged, and the multifunctional pressure reducing valve can be used in a low-temperature environment. The pressure reducing valve can be used without external protection, the maintenance and overhaul cost is reduced, vibration generated in the water flow opening or closing process can be absorbed by the compressible cavity, and the pressure reducing valve has the water hammer preventing function.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a multi-functional pressure reducing valve. Background Art

[0002] A pressure reducing valve, also known as a pressure regulating valve, is a device used to control and reduce the pressure in a system. It is widely used in various industrial and civil fields, such as water treatment, petrochemical industry, natural gas, heating and air conditioning systems, etc.

[0003] Traditional pressure reducing valves usually include a valve body and a pressure reducing component. A flow channel is provided in the valve body, and the pressure reducing component is arranged on the valve body to adjust and reduce the pressure of the medium in the flow channel. However, the existing pressure reducing valve does not have a self-protection function. In a cold environment, the medium in the valve body freezes and expands, easily causing the valve body to rupture. Therefore, additional protection measures are required during the installation process to prevent the pressure reducing valve from being damaged in a harsh environment. Installing additional protection measures is time-consuming and laborious, and the maintenance and repair costs are high.

[0004] Therefore, there is an urgent need for a multi-functional pressure reducing valve to solve the problems in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a multi-functional pressure reducing valve, so that the multi-functional pressure reducing valve can be used in a low-temperature environment without external protection, reducing the maintenance and repair costs.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A multi-functional pressure reducing valve, comprising:

[0008] A valve body, in which a flow channel is opened;

[0009] A pressure reducing component, arranged in the valve body and communicating with the flow channel, and the pressure reducing component can reduce the pressure of the medium in the flow channel;

[0010] A protection component, arranged on the flow channel, the protection component includes a shell and a piston structure. The piston structure is slidably arranged in the shell and divides the shell. One side of the piston structure communicates with the flow channel, and the other side of the piston structure is separated from the flow channel and cooperates with the shell to form a compressible cavity.

[0011] Optionally, the protection component is located upstream of the pressure reducing component.

[0012] Optionally, the protection component is externally arranged on the valve body.

[0013] Optionally, the protection component is detachably connected to the valve body.

[0014] Optionally, the housing is threadedly connected to the valve body, and a wrench mating portion is provided on the outer peripheral surface of the housing.

[0015] Optionally, the protection assembly includes a first elastic member disposed in the compressible chamber. One end of the first elastic member abuts against the piston structure, and the other end abuts against the housing.

[0016] Optionally, the valve body includes a pressure reducing chamber and a filtering chamber that communicate with each other. The multi-functional pressure reducing valve further includes a filtering structure. The pressure reducing assembly is located in the pressure reducing chamber, the filtering structure is located in the filtering chamber, and the filtering chamber is located between the pressure reducing chamber and the protection assembly.

[0017] Optionally, the pressure reducing chamber is inclined in the valve body, and the protection assembly is disposed on the side surface of the valve body.

[0018] Optionally, the valve body further includes a water inlet interface located upstream of the filtering structure and communicating with the flow channel. The protection assembly is detachably externally disposed on the water inlet interface.

[0019] Optionally, the valve body further includes a water outlet interface located downstream of the pressure reducing assembly and communicating with the flow channel. The multi-functional pressure reducing valve further includes a check valve assembly located in the water outlet interface.

[0020] Advantageous Effects:

[0021] The multi-functional pressure reducing valve provided by the present utility model includes a valve body, a pressure reducing assembly, and a protection assembly. A flow channel is formed in the valve body. The pressure reducing assembly is disposed in the valve body and communicates with the flow channel. The pressure reducing assembly can reduce the pressure of the medium in the flow channel. The protection assembly is disposed on the flow channel. The protection assembly includes a housing and a piston structure. The piston structure is slidably disposed in the housing and divides the housing. One side of the piston structure communicates with the flow channel, and the other side of the piston structure is separated from the flow channel and cooperates with the housing to form a compressible chamber. When the medium in the valve body freezes and expands, it can push the piston structure to move along the housing, and the compressible chamber is compressed to absorb the expanded volume, thereby avoiding damage to the valve body and the pipeline, and enabling the multi-functional pressure reducing valve to be used in a low-temperature environment without external protection, reducing the maintenance and repair costs. Moreover, the vibration generated during the opening or closing process of the water flow can be absorbed by the compressible chamber, enabling the pressure reducing valve to have the function of preventing water hammer. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the multi-functional pressure reducing valve provided by the present utility model from one perspective;

[0023] Figure 2 is a schematic structural diagram of the multi-functional pressure reducing valve provided by the present utility model from another perspective;

[0024] Figure 3 is Figure 2 A cross-sectional view taken along line A-A in [it];

[0025] Figure 4 is Figure 2 A cross-sectional view taken along line B-B in [it];

[0026] Figure 5 is Figure 4 An enlarged partial view at C in [it].

[0027] In the figure:

[0028] 100, valve body; 110, flow channel; 111, first annular platform; 112, first annular limiting groove; 113, annular abutting portion; 120, first through hole; 130, third through hole; 140, plug; 150, pressure reducing chamber; 160, filtering chamber; 170, water inlet interface; 180, water outlet interface;

[0029] 200, pressure reducing assembly; 210, valve stem; 220, pressure regulating spring; 230, valve cover; 240, pressure regulating member; 250, support frame; 260, second sealing ring; 270, cap; 280, third sealing ring; 290, sealing seat;

[0030] 300, protection assembly; 310, housing; 311, wrench mating portion; 320, piston structure; 321, piston; 3211, first annular sealing groove; 322, first sealing ring; 330, first elastic member;

[0031] 400, filtering assembly; 410, sealing cover; 411, limiting rib; 420, filtering structure; 421, annular boss;

[0032] 500, check valve assembly; 510, fixed seat; 511, first annular seat; 512, second annular seat; 5121, elastic card; 513, sealing packing; 520, inner core; 530, second elastic member. Detailed implementation manners

[0033] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", and "right" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0037] This embodiment provides a multi-functional pressure reducing valve, as Figures 1 - 5As shown in the figure, the multi-functional pressure reducing valve includes a valve body 100, a pressure reducing component 200, and a protection component 300. A flow channel 110 is provided in the valve body 100. The pressure reducing component 200 is arranged in the valve body 100 and communicated with the flow channel 110. The pressure reducing component 200 can reduce the pressure of the medium in the flow channel 110. The protection component 300 is arranged on the flow channel 110. The protection component 300 includes a housing 310 and a piston structure 320. The piston structure 320 is slidably arranged in the housing 310 and divides the housing 310. One side of the piston structure 320 is communicated with the flow channel 110, and the other side of the piston structure 320 is separated from the flow channel 110 and cooperates with the housing 310 to form a compressible cavity. When the medium in the valve body 100 freezes and expands, it can push the piston structure 320 to move along the housing 310, and the compressible cavity is compressed to absorb the expanded volume, thereby avoiding damage to the valve body 100 and the pipeline, and enabling the multi-functional pressure reducing valve to be used in a low-temperature environment without external protection, reducing the maintenance and overhaul costs. Moreover, during the opening or closing process of the water flow, the generated vibration can be absorbed by the compressible cavity, enabling the pressure reducing valve to have the function of preventing water hammer.

[0038] Optionally, the protection component 300 is located upstream of the pressure reducing component 200. In a low-temperature environment, when the medium freezes and expands, the protection component 300 can absorb the expanded volume before the medium reaches the pressure reducing component 200, avoiding damage to the pressure reducing component 200 due to the expansion of the medium, improving the reliability of the pressure reducing component 200, and extending the service life of the pressure reducing component 200.

[0039] Optionally, the protection component 300 is externally arranged on the valve body 100, avoiding the protection component 300 occupying the internal space of the valve body 100, making the internal layout of the valve body 100 more reasonable and the structure more compact.

[0040] Optionally, the protection component 300 is detachably connected to the valve body 100, making the disassembly and assembly of the protection component 300 more convenient. It is not necessary to disassemble the entire pressure reducing valve to repair or replace the protection component 300, thereby simplifying the maintenance process and saving time and costs.

[0041] Optionally, the housing 310 is threadedly connected to the valve body 100, and a wrench mating portion 311 is provided on the outer peripheral surface of the housing 310. The plate mating portion can be clamped in the plate opening of the wrench, and maintenance personnel can easily disassemble the housing 310 to repair and replace the protection component 300, saving time and labor costs.

[0042] Specifically, the housing 310 is provided with an external thread, and the first through hole 120 is provided with an internal thread. The external thread and the internal thread are screwed together. Through the threaded connection, the disassembly and assembly of the housing 310 and the valve body 100 become more convenient, improving the efficiency of maintenance and overhaul and reducing the downtime.

[0043] Optionally, asFigures 3 - 4 As shown in the figure, a first opening is provided on the housing 310, and a first through hole 120 is provided on the valve body 100. The first through hole 120 communicates with the first opening and the flow channel 110, and the diameter of the first through hole 120 is smaller than the diameter of the first opening; the piston structure 320 includes a piston 321, and the protection component 300 further includes a first elastic member 330. The piston 321 is slidably disposed in the housing 310 and is hermetically connected to the housing 310. The piston 321 divides the internal space of the housing 310, so that one end of the piston 321 communicates with the flow channel 110 through the first through hole 120, and the other end of the piston 321 and the housing 310 enclose a compressible chamber. One end of the first elastic member 330 abuts against the piston 321, and the other end abuts against the end of the housing 310 away from the first opening. When the multi-functional pressure reducing valve is not installed in the pipeline, by designing the diameter of the first through hole 120 to be smaller than the diameter of the first opening, the piston 321 can be limited to prevent the piston 321 from disengaging from the housing 310; when the multi-functional pressure reducing valve is installed in the pipeline, the medium pressure in the pipeline and the pressure of the first elastic member 330 reach equilibrium. When the medium in the valve body 100 freezes and expands in volume, the medium directly pushes the piston 321 to compress the first elastic member 330, and the expanded volume can be absorbed by the compressible chamber, thereby reducing the damage to the valve body 100 and the pipeline. Moreover, the vibration caused by the opening or closing of the water flow can be absorbed by the first elastic member 330 in the compressible chamber, reducing the impact of the vibration on the valve body 100 and the pipeline system, achieving the effect of preventing water hammer. In this embodiment, the first elastic member 330 is a spring. The spring has a simple structure and good shock absorption effect, and can effectively absorb the vibration generated by the closing of the water flow.

[0044] Optionally, as Figure 3 shown, the protection component 300 further includes a first sealing ring 322. At least one first annular sealing groove 3211 is provided on the outer peripheral surface of the piston 321. The first sealing ring 322 is embedded in the first annular sealing groove 3211 to ensure good sealing between the piston 321 and the housing 310, prevent the medium from entering the air chamber, and improve the sealing performance and operation reliability of the protection component 300.

[0045] In this embodiment, two first annular sealing grooves 3211 are provided at intervals on the outer peripheral surface of the piston 321, and a first sealing ring 322 is embedded in each first annular sealing groove 3211 to provide double sealing and ensure good sealing between the piston 321 and the housing 310.

[0046] Optionally, as Figure 4 ​As shown in the figure, the valve body 100 includes a pressure reducing chamber 150 and a filtering chamber 160 that are interconnected. The multi-functional pressure reducing valve further includes a filtering structure 420. The pressure reducing assembly 200 is located in the pressure reducing chamber 150, the filtering structure 420 is located in the filtering chamber 160, and the filtering chamber 160 is located between the pressure reducing chamber 150 and the protection assembly 300. The filtering structure 420 can filter the medium entering the pressure reducing assembly 200, filtering out impurities or particulate matter, thereby effectively protecting the pressure reducing assembly 200 from being affected by pollutants and improving the stability and service life of the multi-functional pressure reducing valve. Moreover, the filtering chamber 160 is arranged between the protection assembly 300 and the pressure reducing chamber 150, and the protection assembly 300 can prevent the filtering chamber 160 from being damaged due to the freezing and expansion of the medium.

[0047] Optionally, as Figure 4 shown, the filtering assembly 400 includes a sealing cover 410 and a filtering structure 420. The sealing cover 410 is detachably connected to the shell of the valve body 100. The filtering structure 420 is arranged in the flow channel 110. One end of the filtering structure 420 abuts against the inner wall of the flow channel 110, and the other end abuts against the bottom wall of the sealing cover 410. The filtering structure 420 can filter the medium entering the pressure reducing assembly 200, effectively removing impurities and particles in the medium entering the pressure reducing assembly 200, ensuring that the pressure reducing assembly 200 is not affected by pollutants during operation, thereby improving the stability and reliability of the multi-functional pressure reducing valve.

[0048] Optionally, in this embodiment, the filtering structure 420 is a filtering barrel. A plurality of filtering holes are provided on the outer peripheral surface of the filtering barrel. There is a gap between the outer periphery of the filtering barrel and the sealing cover 410. The medium can flow into the gap between the filtering barrel and the sealing cover 410 and enter the filtering barrel to realize the filtering of the medium, and then flow out from the opening at the top of the filtering barrel and enter the pressure reducing assembly 200. By setting the filtering structure 420 as a filtering barrel, the effective filtering area of the filtering barrel can be maximally increased, further improving the filtering efficiency of the filtering barrel and the filtering effect of the filtering barrel on the medium.

[0049] Optionally, an annular boss 421 is provided at the top of the filtering barrel, and an annular abutting portion 113 is provided on the inner wall of the flow channel 110. The annular boss 421 abuts against the annular abutting portion 113, thereby limiting the filtering barrel to prevent it from moving or tilting in the flow channel 110, thereby improving the filtering effect of the filtering barrel.

[0050] Optionally, reinforcing ribs are provided in the axial direction of the filtering barrel, and a plurality of reinforcing ribs are spaced apart along the circumferential direction of the filtering barrel, which can effectively reduce the deformation of the filtering barrel during fluid flow or vibration and maintain its stable filtering effect.

[0051] Optionally, a plurality of limiting ribs 411 are provided at intervals along the circumferential direction of the inner wall of the sealing cover 410. The plurality of limiting ribs 411 are used to limit the movement of the filter structure 420 in the radial direction of the sealing cover 410. Specifically, in this embodiment, the filter barrel is provided with four reinforcing ribs, and the inner wall of the sealing cover 410 is provided with four limiting ribs 411. The four limiting ribs 411 are respectively abutted against the four reinforcing ribs, and the filter barrel is in interference fit with the limiting ribs 411, so as to evenly distribute pressure and stress, avoid deformation or damage of the filter barrel, and improve the reliability and durability of the filter assembly 400.

[0052] Optionally, the sealing cover 410 is made of a transparent material. The sealing cover 410 made of a transparent material can facilitate the staff to observe the working state of the filter structure 420 in real time, so that the staff can replace the filter structure 420 in time, which can not only improve the working efficiency of the multi-functional pressure reducing valve, but also further improve the safety of the multi-functional pressure reducing valve. It can be understood that the medium can be a liquid medium or a gas medium, and the specific type of the medium is not specifically limited in this embodiment.

[0053] Optionally, as Figure 1 and Figure 4 shown, the pressure reducing chamber 150 is inclined and arranged in the valve body 100, and the protection assembly 300 is arranged on the side surface of the valve body 100. It can be understood that when the pressure reducing valve is actually used, the end where the medium enters the flow channel 110 is defined as the front of the valve body 100, and the end where the medium flows out of the flow channel 110 is defined as the rear of the valve body 100. The medium flows from front to back in the flow channel 110. In order to ensure the filtering effect of the filter assembly 400 and the filtered impurities can remain in the sealing cover 410 of the filter assembly 400, the sealing cover 410 is arranged below the valve body 100, and the pressure reducing chamber 150 and the pressure reducing assembly 200 are inclined and arranged above the valve body 100; at this time, in order to avoid interference between the protection assembly 300 and other components on the valve body 100, the protection assembly 300 is arranged on the left and right sides of the valve body 100.

[0054] Optionally, the valve body 100 further includes a water inlet interface 170. The water inlet interface 170 is located upstream of the filter structure 420 and is communicated with the flow channel 110. The protection assembly 300 is detachably disposed outside the water inlet interface 170. The vibration caused when the water flow is opened or closed can push the piston 321 to move, so that the vibration at the water inlet interface 170 is absorbed by the compressible cavity, achieving the effect of preventing water hammer.

[0055] Optionally, as Figure 5As shown, the valve body 100 further includes a water outlet interface 180. The water outlet interface 180 is located downstream of the pressure reducing assembly 200 and is in communication with the flow channel 110. The multi-functional pressure reducing valve further includes a check valve assembly 500, and the check valve assembly 500 is located within the water outlet interface 180. The check valve assembly 500 is used to prevent the medium flowing out from the flow channel 110 from flowing back into the pressure reducing assembly 200, protect the pressure reducing assembly 200 from the influence of backflow, and ensure its normal operation.

[0056] Optionally, the check valve assembly 500 includes a fixed seat 510, an inner core 520, and a second elastic member 530. The fixed seat 510 is fixed to the inner wall of the flow channel 110. A second through hole is provided on the fixed seat 510. The inner core 520 is slidably connected to the fixed seat 510. One end of the second elastic member 530 abuts against the fixed seat 510, and the other end abuts against the inner core 520. The elastic force direction of the second elastic member 530 is opposite to the medium flow direction in the flow channel 110. It can be understood that when the medium flows out from the pressure reducing assembly 200 and flows downstream along the flow channel 110, the inner core 520 is pushed by the thrust of the medium to compress the second elastic member 530, and the medium flows out through the second through hole. When the medium stops flowing or the medium pressure at the inlet end is lower than that at the outlet end, the second elastic member 530 pushes the inner core 520 towards the second through hole and blocks the second through hole to close the outlet end of the flow channel 110, preventing the medium from flowing back and playing a check valve role.

[0057] Optionally, as Figure 5 shown, the fixed seat 510 includes a first annular seat 511, a second annular seat 512, and a sealing packing 513. A first annular platform 111 is provided on the inner wall of the flow channel 110. The first annular seat 511 abuts against the first annular platform 111. A first annular limiting groove 112 is provided on the inner wall of the flow channel 110. At least part of the second annular seat 512 is embedded in the first annular limiting groove 112. The sealing packing 513 is clamped between the first annular seat 511 and the second annular seat 512, and the first annular seat 511, the second annular seat 512, and the sealing packing 513 are concentrically arranged to form the above-mentioned second through hole. The inner core 520 is slidably connected to the second annular seat 512 and can abut against the sealing packing 513. The setting of the sealing packing 513 effectively improves the sealing performance of the check valve assembly 500 and prevents medium leakage.

[0058] Optionally, a plurality of elastic cards 5121 are provided on the circumference of the second annular seat 512. Each elastic card 5121 can be clamped in the first annular limiting groove 112. During assembly, the first annular seat 511, the sealing packing 513, and the second annular seat 512 are sequentially placed into the flow channel 110 along the opposite direction of the medium flow in the flow channel 110, and the assembly and fixation are completed by means of the clamping force of the elastic cards 5121 clamped in the first annular limiting groove 112, without the need for additional tools or complex operations, improving the assembly efficiency.

[0059] Optionally, asFigure 4 As shown in the figure, the pressure reducing assembly 200 includes a valve stem 210, a pressure regulating spring 220, a valve cover 230, a pressure regulating member 240, and a support frame 250. The valve cover 230 is hermetically fixed to the valve body 100. The support frame 250 is fixed inside the valve cover 230. The valve stem 210 is slidably connected to the support frame 250, and the valve stem 210 can telescopically move relative to the support frame 250. One end of the valve stem 210 extends into the flow channel 110, and the other end of the valve stem 210 is connected to the pressure regulating spring 220. The end of the pressure regulating spring 220 away from the valve stem 210 abuts against the pressure regulating member 240. The pressure regulating member 240 can adjust the telescopic distance of the valve stem 210 relative to the support frame 250, thereby adjusting the pressure and flow rate of the medium discharged. The structure of the pressure reducing assembly 200 is simple and the pressure reducing effect is good. It should be noted that the pressure reducing principle and steps of the pressure reducing assembly 200 belong to the prior art and will not be elaborated here.

[0060] Optionally, the pressure reducing assembly 200 further includes a cap 270. The cap 270 covers the pressure regulating member 240, which can effectively protect the pressure regulating member 240 from the influence of the external environment, such as dust, moisture or other pollutants, ensuring the normal operation and long-term use of the pressure regulating member 240. Moreover, the design of the cap 270 can prevent misoperation or accidental contact with the pressure regulating member 240, thereby avoiding accidental adjustment of the working state of the multi-functional pressure reducing valve and maintaining the stability and safety of the system.

[0061] Optionally, the pressure reducing assembly 200 further includes a second sealing ring 260. Second sealing rings 260 are provided between the support frame 250 and the valve body 100, between the valve cover 230 and the valve body 100, and between the valve stem 210 and the support frame 250. The second sealing rings 260 are press-fitted into the above-mentioned installation positions respectively, so as to prevent the medium in the flow channel 110 from leaking between the support frame 250 and the valve body 100, between the valve cover 230 and the valve body 100, and between the valve stem 210 and the support frame 250, ensuring the reliability and stability of the pressure relief assembly. It should be noted that in this embodiment, the second sealing ring 260 is an O-shaped rubber ring. The rubber material has good elasticity and wear resistance, low price and long service life.

[0062] Optionally, a third sealing ring 280 and a sealing seat 290 are provided at one end of the valve stem 210 extending into the flow channel 110. The sealing seat 290 is threadedly connected to the front end of the valve stem 210. The third sealing ring 280 is clamped between the sealing seat 290 and the valve stem 210. When the valve stem 210 contracts, the third sealing ring 280 can abut against the support frame 250 prior to the sealing seat 290, playing a buffering role for the valve stem 210 and the sealing seat 290 and reducing the vibration received by the valve stem 210 and the sealing seat 290.

[0063] Optionally, as Figure 4As shown, the valve body 100 is further provided with a third through hole 130 and a plug 140. One end of the third through hole 130 is communicated with the flow channel 110, and the other end is blocked by the plug 140. Removing the plug 140 enables a pressure gauge to be installed at the third through hole 130 to monitor the pressure in the flow channel 110 in real time.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Multifunctional pressure reducing valve, characterized in that, Comprising: A valve body (100) having a flow channel (110) formed therein; A pressure reducing assembly (200) disposed within the valve body (100) and communicating with the flow channel (110), the pressure reducing assembly (200) being capable of reducing the pressure of the medium within the flow channel (110); A protection assembly (300) disposed on the flow channel (110), the protection assembly (300) including a housing (310) and a piston structure (320), the piston structure (320) being slidably disposed within the housing (310) and partitioning the housing (310), one side of the piston structure (320) communicating with the flow channel (110), the other side of the piston structure (320) being separated from the flow channel (110) and cooperating with the housing (310) to form a compressible chamber.

2. The multifunctional pressure reducing valve according to claim 1, characterized in that, The protection assembly (300) is located upstream of the pressure reducing assembly (200).

3. The multi-functional pressure reducing valve according to claim 1, characterized in that, The protection assembly (300) is externally disposed on the valve body (100).

4. The multifunctional pressure reducing valve according to claim 1, characterized in that, The protection assembly (300) is detachably connected to the valve body (100).

5. The multi-functional pressure reducing valve according to claim 4, wherein The housing (310) is threadedly connected to the valve body (100), and a wrench engaging portion (311) is provided on the outer peripheral surface of the housing (310).

6. The multifunctional pressure reducing valve according to claim 1, wherein The protection assembly (300) further includes a first elastic member (330), the first elastic member (330) being disposed within the compressible chamber, one end of the first elastic member (330) abutting against the piston structure (320), and the other end abutting against the housing (310).

7. The multifunctional pressure reducing valve according to claim 1, characterized in that, The valve body (100) includes a pressure reducing chamber (150) and a filtering chamber (160) that communicate with each other. The multi-functional pressure reducing valve further includes a filtering structure (420). The pressure reducing assembly (200) is located within the pressure reducing chamber (150), the filtering structure (420) is located within the filtering chamber (160), and the filtering chamber (160) is located between the pressure reducing chamber (150) and the protection assembly (300).

8. The multifunctional pressure reducing valve according to claim 7, characterized in that The pressure reducing chamber (150) is inclinedly disposed within the valve body (100), and the protection assembly (300) is disposed on the side surface of the valve body (100).

9. The multifunctional pressure reducing valve according to claim 7, characterized in that, The valve body (100) further includes a water inlet interface (170), the water inlet interface (170) being located upstream of the filtering structure (420) and communicating with the flow channel (110), and the protection assembly (300) is detachably externally disposed on the water inlet interface (170).

10. The multi-functional pressure reducing valve according to any one of claims 1-9, characterized in that, The valve body (100) further includes a water outlet interface (180), the water outlet interface (180) being located downstream of the pressure reducing assembly (200) and communicating with the flow channel (110). The multi-functional pressure reducing valve further includes a check valve assembly (500), and the check valve assembly (500) is located within the water outlet interface (180).

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