CN220706103U - Pressure reducing valve - Google Patents

Abstract

The utility model relates to the technical field of hydraulic equipment, in particular to a pressure reducing valve. The pressure reducing valve comprises a valve body, a pressure reducing component and a filter component, wherein a flow passage is formed in the valve body, the pressure reducing component is arranged on the valve body, a medium entering the flow passage can be discharged in a pressure reducing mode, the filter component is arranged below the valve body and located at the upstream and/or downstream of the pressure reducing component, the filter component comprises a filter structure and a seal cover, the seal cover and the valve body are detachably fixed, the filter structure is detachably arranged in the seal cover, a gap exists between the filter structure and the bottom of the seal cover at least, the filter structure is of a one-way opening structure, the filter structure is arranged in the flow passage, the medium can enter the filter structure along the flow passage and flow out from the opening of the filter structure, the filter structure is convenient to replace, and the medium can flow into a gap between the filter structure and the bottom of the seal cover and enter the filter structure to realize the filtration of the medium, so that the filter efficiency of the filter structure and the filter effect of the filter structure on the medium are further improved.

Description

Pressure reducing valve

Technical Field

The utility model relates to the technical field of hydraulic equipment, in particular to a pressure reducing valve.

Background

The pressure reducing valve is a valve which adjusts the inlet pressure to the preset outlet pressure through the self mechanical component adjustment and automatically maintains the outlet pressure stable by means of the energy of the medium. The pressure reducing valve is used for reducing the pressure of a certain branch in the hydraulic system to be lower than the supply pressure of the hydraulic pump so as to meet the requirements of an actuating mechanism (such as clamping, positioning oil circuit, braking, clutch oil circuit, system control oil circuit and the like) and keep the pressure basically constant.

In the prior art, CN210859905U is taken as an example, and a filtering passage is arranged at the downstream of the pressure reducing assembly, and a cylindrical filter screen is arranged in the filtering passage, so that the medium subjected to pressure reduction is filtered. However, in an actual working scene, the cylindrical filter screen is embedded in the filter channel along the axial direction and is abutted against the inner wall of the filter channel, so that the effective filter area of the cylindrical filter screen is small, and the filter effect is poor. In order to solve the above problems, taking CN102425692B as an example, the filter screen is set to be a straight cylinder type, and a notch is formed on the peripheral wall of the straight cylinder type filter screen, so that a medium enters the filter screen along the notch on the peripheral wall of the straight cylinder type filter screen to be filtered, so as to improve the filtering effect on the medium. But in the actual working process, the medium can flow out from the openings at the two ends of the straight-barrel type filter screen, and the filtering effect on the medium is still poor.

Therefore, there is a need for an inventive pressure relief valve to address the above-described problems.

Disclosure of Invention

The utility model aims to provide a pressure reducing valve so as to realize sufficient filtration of media flowing through the pressure reducing valve, and the pressure reducing valve has good filtration effect and improves safety.

To achieve the purpose, the utility model adopts the following technical scheme:

a pressure relief valve, comprising:

the valve body is internally provided with a flow passage;

the pressure reducing assembly is arranged on the valve body and can reduce pressure and discharge the medium entering the flow passage; and

the filter component is arranged below the valve body and is positioned at the upstream of the pressure reducing component, the filter component comprises a filter structure and a sealing cover, the sealing cover is detachably fixed with the valve body, the filter structure is detachably arranged in the sealing cover, a gap exists between the filter structure and at least the bottom of the sealing cover, the filter structure is of a one-way opening structure, the filter structure is arranged in the flow passage, and the medium can enter the filter structure along the flow passage and flow out from the opening of the filter structure.

Preferably, the filter assembly further comprises:

the filter comprises a filter structure, wherein an annular boss is arranged on the outer peripheral wall of one end of the opening, the filter structure is sleeved with the fixing piece, one end of the fixing piece is abutted to the end face of the annular boss far away from the opening, and the other end of the fixing piece is abutted to the inner cavity wall of the sealing cover.

As a preferable scheme, a first accommodating groove is formed in the sealing cover, and one end, abutting against the inner cavity wall of the sealing cover, of the fixing piece is limited and fixed in the first accommodating groove.

Preferably, the valve body is provided with a first butt joint part, and the sealing cover and the first butt joint part are detachably, hermetically and fixedly arranged.

Preferably, the filter assembly further comprises:

the first sealing piece is sleeved on the periphery of the first butt joint part, the first sealing piece is clamped between the sealing cover and the first butt joint part, and the first sealing piece is in interference fit with the sealing cover and the first butt joint part at the same time.

Preferably, the pressure reducing valve further comprises:

and the stop component is arranged on the valve body and is positioned at the upstream of the filter component and the pressure reducing component, and the stop component can control the conduction and the separation between the flow passage and the filter component and between the flow passage and the pressure reducing component.

Preferably, the cutoff assembly includes:

the stop piece is arranged in the flow channel and can be used for blocking and conducting the flow channel;

the first valve rod is fixed with the stop piece and drives the stop piece to block and conduct the flow channel.

As an optimal scheme, the inner cavity wall of the sealing cover is provided with a limiting rib, the filtering structure is limited and fixed on the limiting rib, and the limiting rib can be used for butt joint and fixation of an opening of the filtering structure and an inlet of the flow channel.

Preferably, the sealing cover is made of transparent materials.

The utility model has the beneficial effects that:

according to the pressure reducing valve, the filtering assembly is arranged at the upstream and/or downstream of the pressure reducing assembly, the filtering structure with the unidirectional opening in the filtering assembly is arranged in the flow passage of the valve body, so that media can enter the filtering structure along the flow passage and flow out of the opening of the filtering structure, the filtering effect on the media is improved, the use safety of the pressure reducing valve is further improved, the filtering structure is detachably arranged in the sealing cover, the sealing cover and the valve body are detachably fixed, the filtering structure is convenient to replace in time, a gap is reserved between the filtering structure and at least the bottom of the sealing cover, the filtering structure and the bottom of the sealing cover are kept in suspension, and the media can flow into the gap between the filtering structure and the bottom of the sealing cover and enter the filtering structure to filter the media, so that the filtering effect on the media is improved. In addition, because the filter component sets up in the below of valve body, the impurity of filtering out by the filter component can subside under the effect of self gravity, avoids the impurity shutoff runner of filtering out, ensures the normal work of relief pressure valve.

Drawings

FIG. 1 is a schematic diagram of a pressure reducing valve according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a pressure relief valve according to an embodiment of the present utility model;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

FIG. 4 is a schematic cross-sectional view of a filter assembly according to a first embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a shut-off assembly according to a first embodiment of the present utility model;

FIG. 6 is a schematic illustration of the flow of a medium within a pressure relief valve provided in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of a pressure reducing valve according to a second embodiment of the present utility model;

fig. 8 is a schematic cross-sectional view of a pressure reducing valve according to a third embodiment of the present utility model.

In the figure:

1000. a pressure reducing valve;

100. a filter assembly; 110. a filtering structure; 111. an annular boss; 120. a fixing member; 130. a sealing cover; 131. a first accommodating groove; 140. a first seal; 150. a limit rib;

200. a pressure relief assembly; 210. a second valve stem; 220. a pressure regulating spring; 230. a valve cover; 240. a pressure regulating member; 250. a third seal; 260. a pressure release member; 270. a support frame;

300. a valve body; 310. a flow passage; 320. a first butt joint part; 330. a second butt joint part;

400. a shut-off assembly; 410. a stop member; 420. a first valve stem; 430. a hand piece; 440. a locking member; 450. and a second seal.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

In the prior art, CN210859905U is taken as an example, and a filtering passage is arranged at the downstream of the pressure reducing assembly, and a cylindrical filter screen is arranged in the filtering passage, so that the medium subjected to pressure reduction is filtered. However, in an actual working scene, the cylindrical filter screen is embedded in the filter channel along the axial direction and is abutted against the inner wall of the filter channel, so that the effective filter area of the cylindrical filter screen is small, and the filter effect is poor. In order to solve the above problems, taking CN102425692B as an example, the filter screen is set to be a straight cylinder type, and a notch is formed on the peripheral wall of the straight cylinder type filter screen, so that a medium enters the filter screen along the notch on the peripheral wall of the straight cylinder type filter screen to be filtered, so as to improve the filtering effect on the medium. But in the actual working process, the medium can flow out from the openings at the two ends of the straight-barrel type filter screen, and the filtering effect on the medium is still poor.

In order to solve the above-described problems, as shown in fig. 1 to 3, the present embodiment provides a pressure reducing valve 1000. The pressure reducing valve 1000 comprises a valve body 300, a pressure reducing assembly 200 and a filter assembly 100, wherein a flow passage 310 is formed in the valve body 300, the pressure reducing assembly 200 is arranged on the valve body 300, the pressure reducing assembly 200 can reduce pressure and discharge media entering the flow passage 310, the filter assembly 100 is arranged below the valve body 300 and is positioned at the upstream and/or downstream of the pressure reducing assembly 200, the filter assembly 100 comprises a filter structure 110 and a seal cover 130, the seal cover 130 is detachably fixed with the valve body 300, the filter structure 110 is detachably arranged in the seal cover 130, a gap exists between the filter structure 110 and the bottom of the seal cover 130 at least, the filter structure 110 is of a one-way opening structure, the filter structure 110 is arranged in the flow passage 310, and the media can enter the filter structure 110 through the flow passage 310 and flow out from the opening of the filter structure 110.

The pressure reducing valve 1000 is provided with the filter assembly 100 at the upstream and/or downstream of the pressure reducing assembly 200, and the filter structure 110 with a unidirectional opening in the filter assembly 100 is arranged in the flow passage 310 of the valve body 300, so that media can enter the filter structure 110 along the flow passage 310 and flow out of the opening of the filter structure 110, the filtering effect on the media is improved, the use safety of the pressure reducing valve 1000 is further improved, the filter structure 110 is convenient to replace in time by detachably mounting the filter structure 110 in the seal cover 130 and detachably fixing the seal cover 130 and the valve body 300, and a gap is reserved between the filter structure 110 and at least the bottom of the seal cover 130, so that the space between the filter structure 110 and the bottom of the seal cover 130 can be kept in suspension, the media can flow into the space between the filter structure 110 and the bottom of the seal cover 130 and enter the filter structure 110 to realize the filtering of the media, and the filtering effect on the media is improved. In addition, since the filter assembly 100 is disposed below the valve body 300, impurities filtered by the filter assembly 100 will be settled under the action of gravity, so as to prevent the filtered impurities from blocking the flow channel 310, and ensure the normal operation of the pressure reducing valve 1000.

It should be noted that, in the present embodiment, the filter assembly 100 is disposed upstream of the pressure reducing assembly 200 to filter the medium between the medium entering the pressure reducing assembly 200, so as to avoid impurities in the medium from affecting the normal operation of the pressure reducing assembly 200, and further improve the protection of the pressure reducing assembly 200. In other embodiments, the filter assembly 100 may be disposed downstream of the pressure reducing assembly 200, and the filter assembly 100 may be disposed both upstream and downstream of the pressure reducing assembly 200, which is not particularly limited.

In addition, in this embodiment, gaps exist between the outer circumferences and bottoms of the filtering structure 110 and the sealing cover 130, and medium can flow into the gaps between the outer circumferences and bottoms of the filtering structure 110 and the sealing cover 130 and enter the filtering structure 110 to filter the medium, so that the contact area between the filtering structure 110 and the sealing cover 130 can be reduced to the greatest extent under the condition that the size of the filtering structure 110 is unchanged, and then the effective filtering area of the filtering structure 110 is improved to the greatest extent, and the filtering efficiency of the filtering structure 110 and the filtering effect of the filtering structure 110 on the medium are further improved.

Further, the sealing cap 130 is made of a transparent material. The sealing cover 130 made of transparent materials can facilitate the staff to observe the working state of the filtering structure 110 in real time, so that the staff can replace the filtering structure 110 in time, not only can the working efficiency of the pressure reducing valve 1000 be improved, but also the safety of the pressure reducing valve 1000 can be further improved. It will be appreciated that the medium may be a liquid medium or a gaseous medium, and the present embodiment is not particularly limited with respect to the specific type of medium.

In this embodiment, the sealing cover 130 is made of a PC (Polycarbonate) material, which has excellent mechanical properties and is easy to process and mold. In other embodiments, the sealing cover 130 may also be made of PMMA (polymethyl methacrylate ) material, PS (Polystyrene) material or other transparent materials, which is not limited in this embodiment.

Further, the filter assembly 100 further includes a fixing member 120, wherein an annular boss 111 is disposed on an outer peripheral wall of one end of the filter structure 110, which is provided with an opening, the fixing member 120 is sleeved on the outer periphery of the filter structure 110, one end of the fixing member 120 abuts against an end surface of the annular boss 111, which is far away from the opening, and the other end of the fixing member 120 abuts against an inner cavity wall of the seal cover 130. Through setting up annular boss 111 in the outer peripheral wall of the one end that sets up the opening in filtering structure 110 to set up mounting 120 between annular boss 111 and sealed cowling 130, guarantee that the both ends of mounting 120 respectively with annular boss 111 and sealed cowling 130's inner chamber wall looks butt, with filtering structure 110 and runner 310 relatively fixed, fixed effectual.

It should be noted that, in this embodiment, the filtering structure 110 is a straight-tube structure with a unidirectional opening, the fixing member 120 is a compression spring, the compression spring is sleeved on the outer periphery of the straight-tube filtering structure 110, and two ends of the compression spring are respectively abutted against the annular boss 111 and the inner cavity wall of the sealing cover 130, so as to save the installation space of the compression spring and the filtering structure 110. The compression spring has simple structure and high elasticity. In other embodiments, the filtering structure 110 may be a conical structure with unidirectional openings, a cubic structure with unidirectional openings, or other unidirectional opening structures, the fixing member 120 may be other elastic structures or rigid structures, which are not limited in this embodiment,

when the filter structure 110 needs to be replaced, the sealing cover 130 is removed first, the compression spring sleeved on the periphery of the filter structure 110 resets under the action of the elasticity of the compression spring, the opening of the filter structure 110 is not in butt joint with the inlet of the flow channel 310, then the filter structure 110 is removed, the opening of the new filter structure 110 is in butt joint with the inlet of the flow channel 310, the compression spring is sleeved on the periphery of the new filter structure 110 again, and the sealing cover 130 is reinstalled to enable the two ends of the compression spring to be respectively in butt joint with the annular boss 111 and the sealing cover 130 of the new filter structure 110, so that the replacement of the filter structure 110 is completed.

In order to improve the contact accuracy between the compression spring and the seal cover 130, as shown in fig. 2 to 4, in this embodiment, a first accommodating groove 131 is formed on the seal cover 130, and one end of the compression spring, which contacts the inner cavity wall of the seal cover 130, is limited and fixed in the first accommodating groove 131. By providing the first receiving groove 131 on the sealing cap 130, the compression spring is prevented from being biased when the sealing cap 130 is mounted, and stable butt joint of the compression spring and the sealing cap 130 can be ensured.

Preferably, the valve body 300 is provided with a first abutting portion 320, and the seal cover 130 is detachably and hermetically fixed with the first abutting portion 320. Specifically, in the present embodiment, the seal cap 130 is provided with an internal thread, the first butt joint portion 320 is provided with an external thread, and the seal cap 130 is sleeved on the outer periphery of the first butt joint portion 320 and is screwed with the first butt joint portion 320. The fixing strength of the thread fixing is high, and the dismounting is convenient. In other embodiments, the sealing cover 130 may be inserted into and fixed to the first abutting portion 320, which is not limited in this embodiment.

Furthermore, in the present embodiment, the filter assembly 100 further includes a first sealing member 140, wherein the first sealing member 140 is sleeved on the outer circumference of the first abutting portion 320, and the first sealing member 140 is sandwiched between the seal housing 130 and the first abutting portion 320. By arranging the first sealing element 140 between the sealing cover 130 and the first butt joint part 320 and enabling the first sealing element 140 to be in interference fit with the sealing cover 130 and the first butt joint part 320 at the same time, sealing fixation between the sealing cover 130 and the first butt joint part 320 can be ensured, leakage of a medium along a gap between the sealing cover 130 and the first butt joint part 320 is avoided, and pressure stability in the flow channel 310 is ensured. In this embodiment, the first sealing member 140 is an O-shaped rubber ring, and the rubber material has good elasticity and wear resistance, low cost, and long service life. In other embodiments, the first sealing member 140 may be other sealing structures, and the present embodiment is not limited specifically.

Preferably, as shown in fig. 1 and 2, the pressure reducing valve 1000 further includes a shut-off assembly 400, wherein the shut-off assembly 400 is disposed on the valve body 300 upstream of the filter assembly 100 and the pressure reducing assembly 200, and the shut-off assembly 400 is capable of controlling the communication and interruption of the flow passage 310 with the filter assembly 100 and the pressure reducing assembly 200. By providing the shut-off assembly 400 upstream of the filter assembly 100 and the pressure relief assembly 200, the flow passage 310 can be isolated from the filter assembly 100 and the pressure relief assembly 200 by adjusting the shut-off assembly 400 when the filter structure 110 needs to be replaced, solving the problem of inflow of media during replacement of the filter structure 110.

The specific structure of the shut-off assembly 400 will be described with reference to fig. 2 and 5, wherein the shut-off assembly 400 includes a shut-off member 410 and a first valve rod 420, the shut-off member 410 is disposed in the flow channel 310, the shut-off member 410 can block and conduct the flow channel 310, the first valve rod 420 is fixed to the shut-off member 410, and the first valve rod 420 drives the shut-off member 410 to block and conduct the flow channel 310. It should be noted that, in this embodiment, the stop component 400 is a ball valve, the stop component 410 is a ball valve core, a through hole is formed in the ball valve core, and the first valve rod 420 can drive the ball valve core to rotate, so that the through hole on the ball valve core is conducted or separated from the flow channel 310, and further the effect of separating the flow channel 310 from the filter component 100 is achieved, and the structure is simple and the adjustment is convenient.

Further, the shut-off assembly 400 further comprises a hand piece 430, wherein the hand piece 430 is removably secured to the first valve stem 420. When the relative position of the ball valve core needs to be rotated, the operator can drive the first valve rod 420 to rotate through the rotary hand piece 430, and then drive the ball valve core connected with the first valve rod 420 to rotate, so that the operation is convenient, time and labor are saved.

Specifically, in this embodiment, the stop assembly 400 further includes a locking member 440, wherein an external thread is disposed at an end of the first valve stem 420 away from the stop member 410, a through hole is disposed on the hand piece 430, the hand piece 430 can be sleeved and fixed along the through hole to the outer periphery of the end of the first valve stem 420 where the external thread is disposed, an internal thread is disposed on the locking member 440, and the locking member 440 can be screwed and locked with the end of the first valve stem 420 where the external thread is disposed.

When the hand piece 430 is required to be fixed with the first valve rod 420, firstly, the through hole on the hand piece 430 is inserted into the first end provided with the external thread in the first valve rod 420, then the locking piece 440 is screwed and fixed with the end provided with the external thread in the first valve rod 420, so that the hand piece 430 is clamped between the first valve rod 420 and the locking piece 440, and the fixation of the hand piece 430 and the first valve rod 420 is completed; when it is desired to detach the hand piece 430 from the first valve stem 420, the locking member 440 is rotated in a reverse direction to disengage the locking member 440 from the first valve stem 420, facilitating subsequent removal of the hand piece 430 from the first valve stem 420.

Further, the shut-off assembly 400 further includes a second sealing member 450, wherein the second sealing member 450 is sleeved on the outer periphery of the first valve rod 420, the valve body 300 is provided with a second butt joint portion 330, the first valve rod 420 is accommodated in the second butt joint portion 330, the second sealing member 450 is clamped between the first valve rod 420 and the second butt joint portion 330, and the second sealing member 450 is in interference fit with the first valve rod 420 and the second butt joint portion 330. By disposing the second seal 450 between the first valve stem 420 and the second docking portion 330 and ensuring that the second seal 450 is simultaneously in interference fit with the first valve stem 420 and the second docking portion 330, the problem of leakage of the medium along the gap between the first valve stem 420 and the second docking portion 330 can be avoided. In this embodiment, the second sealing member 450 is an O-shaped rubber ring, and the rubber material has good elasticity and wear resistance, low cost, and long service life. In other embodiments, the second sealing member 450 may be other sealing structures, and the present embodiment is not limited specifically.

Preferably, the pressure reducing assembly 200 comprises a second valve rod 210, a pressure regulating spring 220, a valve cover 230, a pressure regulating member 240 and a supporting frame 270, wherein the valve cover 230 is fixed with the valve body 300 in a sealing way, the supporting frame 270 is fixed in the valve cover 230, the second valve rod 210 is connected with the supporting frame 270, the second valve rod 210 can move in a telescopic way relative to the supporting frame 270, one end of the second valve rod 210 extends out of a flow passage 310, the other end of the second valve rod 210 is connected with the pressure regulating spring 220, the other end of the pressure regulating spring 220 is connected with the pressure regulating member 240, the pressure regulating member 240 can regulate the telescopic distance of the second valve rod 210 relative to the supporting frame 270, and then the pressure and the flow of medium discharge are regulated. It should be noted that the decompression principle and the decompression step of the decompression assembly 200 belong to the prior art, and are not described herein.

Furthermore, in the present embodiment, the pressure reducing assembly 200 further includes a third seal 250, the third seal 250 is sandwiched between the second valve stem 210 and the support frame 270, between the support frame 270 and the bonnet 230, and between the second valve stem 210 and the bonnet 230, and the third seal 250 is interference fit with the second valve stem 210 and the support frame 270, the support frame 270 and the bonnet 230, and the second valve stem 210 and the bonnet 230, respectively. By sandwiching the third seal 250 of interference fit between the second valve stem 210 and the support bracket 270, between the support bracket 270 and the bonnet 230, and between the second valve stem 210 and the bonnet 230, respectively, problems of leakage of the medium along the gaps between the second valve stem 210 and the support bracket 270, between the support bracket 270 and the bonnet 230, and between the second valve stem 210 and the bonnet 230 can be avoided. In this embodiment, the third sealing member 250 is an O-shaped rubber ring, and the rubber material has good elasticity and wear resistance, low cost, and long service life. In other embodiments, the third sealing member 250 may be other sealing structures, and the present embodiment is not limited specifically.

In addition, since the pressure reducing assembly 200 can reduce the pressure of the medium to the preset pressure, so that the medium can be discharged at a stable pressure, the pressure reducing assembly 200 also has good pressure stabilization, and can reduce the pressure of the medium with high pressure input to the preset low pressure and then discharge the medium, so that the subsequent transportation treatment of the medium is facilitated.

Further, the pressure reducing assembly 200 further includes a pressure releasing member 260, the pressure releasing member 260 is disposed on the valve body 300 and is in communication with the flow channel 310, and the pressure releasing member 260 can perform pressure releasing treatment on the flow channel 310, so as to ensure the use safety of the pressure reducing valve 1000. It should be noted that, in this embodiment, a detecting member may be further disposed at the pressure release member 260 to detect the pressure in the flow 310, so that the pressure release is performed by the staff according to the detection information, and the safety is further improved.

Referring to fig. 6, a specific flow process of a medium in the pressure reducing valve 1000 will be described, in this embodiment, the medium first enters the pressure reducing valve 1000 along the flow channel 310, flows through the ball valve and then enters the sealing cover 130, the medium in the sealing cover 130 enters the filtering structure 110 from the periphery and the bottom of the filtering structure 110, so as to realize filtering of the medium, at this time, the filtered impurities will settle at the bottom of the sealing cover 130, the medium after filtering flows out from the opening of the filtering structure 110 and flows into the pressure reducing assembly 200 for pressure reducing treatment, and the medium after pressure reducing treatment is finally discharged from the pressure reducing valve 1000 along the flow channel 310.

Example two

The specific structure of the pressure reducing valve 1000 disclosed in this embodiment is substantially the same as that of the first embodiment, and the specific structure of the pressure reducing valve 1000 disclosed in this embodiment is different from that of the first embodiment in that: the specific type of the stop assembly 400 is different, and the filter assembly 100 in this embodiment does not include the fixing member 120, and the seal cover 130 in this embodiment is provided with the stop rib 150.

Specifically, as shown in fig. 7, in the present embodiment, the stop assembly 400 is a gate valve, and the inner cavity wall of the seal cover 130 is provided with a limiting rib 150, the filter structure 110 is fixed on the limiting rib 150 in a limiting manner, and the limiting rib 150 can fix the filter structure 110 and the flow channel 310 relatively. By providing the spacing ribs 150 on the inner cavity wall of the seal housing 130 to bear and spacing the filter structure 110, no additional fixing members 120 are required, further simplifying the structure of the pressure reducing valve 1000. In addition, the gate valve has small fluid resistance, saves labor in opening and closing and has wide application range. The specific structure and working principle of the gate valve are substantially the same as those of the ball valve in the first embodiment, and will not be described here.

Example III

The specific structure of the pressure reducing valve 1000 disclosed in this embodiment is substantially the same as that of the first embodiment, and the specific structure of the pressure reducing valve 1000 disclosed in this embodiment is different from that of the first embodiment in that: the specific type of cutoff component 400 varies.

Specifically, as shown in fig. 8, in the present embodiment, the shut-off assembly 400 is a shut-off valve. The sealing performance of the stop valve is good, and the service life is long. The specific structure and working principle of the stop valve are substantially the same as those of the ball valve in the first embodiment, and will not be described here.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The relief valve, its characterized in that includes:

a valve body (300), wherein a flow passage (310) is formed in the valve body (300);

a pressure reducing assembly (200) disposed on the valve body (300), the pressure reducing assembly (200) being capable of reducing pressure of the medium entering the flow passage (310) to be discharged; and

the filter assembly (100) is arranged below the valve body (300) and is located at the upstream and/or downstream of the pressure reducing assembly (200), the filter assembly (100) comprises a filter structure (110) and a sealing cover (130), the sealing cover (130) is detachably fixed with the valve body (300), the filter structure (110) is detachably arranged in the sealing cover (130) and a gap exists between the filter structure (110) and at least the bottom of the sealing cover (130), the filter structure (110) is of a one-way opening structure, the filter structure (110) is arranged in the flow channel (310), and media can enter the filter structure (110) along the flow channel (310) and flow out of an opening of the filter structure (110).

2. The pressure relief valve of claim 1, wherein the filter assembly (100) further comprises:

the filter comprises a fixing piece (120), wherein an annular boss (111) is arranged on the outer peripheral wall of one end of an opening in a filter structure (110), the periphery of the filter structure (110) is sleeved with the fixing piece (120), one end of the fixing piece (120) is abutted to the end face of the opening in the annular boss (111), and the other end of the fixing piece (120) is abutted to the inner cavity wall of a sealing cover (130).

3. The pressure reducing valve according to claim 2, wherein the sealing cover (130) is provided with a first accommodating groove (131), and one end of the fixing piece (120) abutted against the inner cavity wall of the sealing cover (130) is limited and fixed in the first accommodating groove (131).

4. The pressure reducing valve according to claim 1, wherein a first abutting portion (320) is provided on the valve body (300), and the seal cover (130) is detachably sealed and fixed with the first abutting portion (320).

5. The pressure relief valve of claim 4, wherein said filter assembly (100) further comprises:

the first sealing element (140), the first sealing element (140) is sleeved on the periphery of the first butt joint part (320), the first sealing element (140) is clamped between the sealing cover (130) and the first butt joint part (320), and the first sealing element (140) is in interference fit with the sealing cover (130) and the first butt joint part (320) at the same time.

6. The pressure relief valve according to any one of claims 1-5 wherein said pressure relief valve further comprises:

-a shut-off assembly (400), said shut-off assembly (400) being arranged on said valve body (300) upstream of said filter assembly (100) and said pressure relief assembly (200), said shut-off assembly (400) being capable of controlling the conduction and interruption between said flow passage (310) and said filter assembly (100) and said pressure relief assembly (200).

7. The pressure relief valve of claim 6, wherein said shut-off assembly (400) comprises:

a blocking member (410) disposed in the flow path (310), the blocking member (410) being capable of blocking and conducting the flow path (310);

the first valve rod (420) is fixed with the stop piece (410), and the first valve rod (420) drives the stop piece (410) to block and conduct the flow channel (310).

8. The pressure relief valve of claim 6, wherein the shut-off assembly (400) may employ any one of a ball valve, a gate valve, or a shut-off valve.

9. The pressure reducing valve according to claim 1, wherein a limiting rib (150) is disposed on an inner cavity wall of the sealing cover (130), the filtering structure (110) is limited and fixed on the limiting rib (150), and the limiting rib (150) can relatively fix the filtering structure (110) and the flow channel (310).

10. The pressure reducing valve according to any one of claims 1 to 5, wherein the sealing cap (130) is made of a transparent material.