Stop valve with filtering function

Abstract

The utility model provides a stop valve with a filtering function. The stop valve aims to solve the problems that an existing like product is high in manufacturing cost and difficult to maintain. The stop valve comprises a valve body, a middle valve wall in the valve body divides an inner cavity into a left valve cavity and a right valve cavity, a communication opening is formed in the middle valve wall and detachably connected with an annular valve seat, the lower end of the valve seat is detachably connected with a cylindrical filter screen, and the filter screen is located in the left valve cavity. A limiting ring is arranged at the upper end of the valve seat, and the lower end of the valve seat has two connection modes: one connection mode is that a fastening nut is connected and is matched with the limiting ring to fix the valve seat on the middle valve wall, and the fastening nut is positioned in a cylindrical area of a left valve port to facilitate operation; the middle valve wall on the peripheral side of the communication port is thickened so as to meet the thread machining requirement. A through hole is formed in the side wall of the filter screen, the upper end of the filter screen is inserted into a valve seat connecting groove and can be fixed or move within a limited range, fluid impurities can be efficiently filtered, and components can be conveniently maintained and replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a stop valve with filtering function. BACKGROUND

[0002] In the fluid conveying and control system, the stop valve plays a vital role, it can accurately control the on-off of fluid, and is widely used in petroleum, chemical industry, electric power, water supply and drainage and many other fields. With the increasing requirement of industrial production and various application scenarios for fluid purity, the stop valve with filtering function emerges as the times require, this kind of valve not only can realize the blocking function of conventional stop valve, but also can effectively filter the impurities in fluid, prevent the damage of impurities to subsequent pipeline, equipment, and guarantee the stable operation of system.

[0003] In the prior art, there are various forms of filtering stop valves. For example, the patent application number CN202223109100.7 discloses a filtering stop valve (refer to figure 1), which has certain limitations in structural design. On the one hand, the filtering stop valve adopts a cylindrical filter screen inside to realize the filtering function. In order to ensure that the filter screen can be stably installed in the valve body, a special installation position matched with it needs to be specially processed on the inner wall of the valve body. This processing process is relatively complex, not only increases the manufacturing process of the valve body, but also may need to use special processing equipment and process, so that the manufacturing cost of the valve body rises sharply. In large-scale production or projects with strict cost control requirements, the high cost problem caused by the filter screen installation structure is particularly prominent, which limits the market competitiveness of the product.

[0004] On the other hand, the filtering stop valve in this patent, the valve seat sealed with the stop valve plate is part of the valve body, which adopts an integrated design. In the long-term use process, the valve seat is frequently rubbed and extruded with the valve plate, and is prone to wear. Once the valve seat is worn, due to its integrated structure with the valve body, the maintenance and replacement of the valve seat become extremely difficult. Usually, the entire valve body needs to be disassembled or even replaced, which not only consumes a lot of manpower, material resources and time, but also may cause the entire fluid conveying system to be out of operation for a long time, causing huge economic losses to production and operation. Moreover, in some special working conditions, such as high temperature, high pressure and strong corrosive medium conveying system, the wear rate of the valve seat is faster, and the disadvantages of difficult maintenance and replacement are more prominent, which seriously affects the service life and reliability of the filtering stop valve.

[0005] In summary, the existing filtering stop valve has the problems of high manufacturing cost and difficult maintenance and replacement of valve seat in structural design, and a new technical scheme is needed to overcome these defects to meet the increasing industrial demand and market competition requirements. SUMMARY

[0006] In order to solve the problems in the background art, the utility model provides a stop valve with filtering function to solve the above technical problems.

[0007] The technical scheme of the utility model is as follows:

[0008] A stop valve with filtering function, including valve body, the inner chamber of valve body is divided into left valve chamber and right valve chamber by the middle valve wall in valve body, the middle valve wall is equipped with the communicating port of communicating left valve chamber and right valve chamber, the communicating port is detachably connected with annular valve seat, the lower end of valve seat is detachably connected with filter screen.

[0009] The utility model further sets up, the outer side wall on the upper end of valve seat is equipped with annular limit ring, the lower end of valve seat is connected with fastening nut, and valve seat is fixedly connected with the middle valve wall under the cooperation of fastening nut and limit ring.

[0010] The utility model further sets up, the lower end of valve seat is screw -threaded with communicating port.

[0011] The utility model further sets up, filter screen is cylindrical, and filter screen is hollow and sets up to the opening upwards.

[0012] The utility model further sets up, the lower end of valve seat is equipped with annular connecting groove, and the upper end of cylindrical filter screen is inserted into connecting groove.

[0013] The utility model further sets up, in up-down direction, the distance from the lower end of valve seat to the bottom wall of valve body is less than the height of filter screen.

[0014] The utility model further sets up, the side wall of filter screen has a plurality of through -holes respectively.

[0015] The utility model further sets up, the left side of valve body is equipped with left valve port, and fastening nut is located in the cylindrical area of left valve port, and the right side of valve body is equipped with right valve port.

[0016] The utility model further sets up, the upper side of valve body is equipped with the upper valve port corresponding with the coaxial communicating port.

[0017] The utility model further sets up, the middle valve wall of communicating port periphery is thickened and sets up.

[0018] Adopt the above technical scheme, the beneficial effects of the utility model are as follows:

[0019] Valve seat is detachably arranged, and is convenient to maintain and replace.

[0020] The filter screen is connected with the valve seat and is limited between the valve seat and the side wall of the valve body, without the need of machining and manufacturing the structure for installing the filter screen in the valve body, and the setting of the filter screen does not increase the manufacturing cost of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0022] Figure 1 It is a structural schematic diagram of the prior art.

[0023] Figure 2 It is a structural schematic diagram of the detachable connection implementation structure one of the valve seat of the present application.

[0024] Figure 3 It is a structural schematic diagram of the detachable connection implementation structure two of the valve seat of the present application.

[0025] Figure 4 It is a structural schematic diagram of the valve seat of the present application.

[0026] Figure 5 It is a structural schematic diagram of the filter screen of the present application.

[0027] Explanation of reference numerals in the drawings: valve body 1, left valve cavity 2, right valve cavity 3, middle valve wall 4, communication port 5, valve seat 6, filter screen 7, limiting ring 8, fastening nut 9, connecting groove 10, left valve port 11, right valve port 12, upper valve port 13. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] The following references Figures 1-5 The present application is described as follows:

[0030] Embodiment: a stop valve with filtering function, comprising a valve body 1, an intermediate valve wall 4 is arranged in the valve body 1, which divides the inner cavity of the valve body 1 into a left valve cavity 2 and a right valve cavity 3, a communication port 5 is arranged on the intermediate valve wall 4, which communicates the left valve cavity 2 and the right valve cavity 3, the left valve cavity 2 is used as an area for fluid to enter and be preliminarily treated, and the right valve cavity 3 is responsible for receiving filtered fluid for subsequent delivery to the pipeline system. The communication port 5 becomes the only channel for fluid communication between the left and right valve cavities.

[0031] A left valve port 11 is arranged on the left side of the valve body 1, a right valve port 12 is arranged on the right side of the valve body 1, and an upper valve port 13 coaxially corresponding to the communication port 5 is arranged on the upper side of the valve body 1.

[0032] The communication port 5 is detachably connected with an annular valve seat 6, which brings many advantages. From the maintenance point of view, during long-term operation, the valve seat 6 is prone to wear and deformation due to frequent contact and friction with other moving parts of the stop valve, such as bearing certain impact force and friction force when cooperating with the opening and closing action of the valve plate. The detachable feature allows the damaged valve seat 6 to be conveniently removed from the communication port 5 and replaced with a new one without the need for large-scale disassembly or scrapping of the entire valve body 1. This not only greatly shortens the maintenance time and reduces the loss caused by downtime to the production process, but also reduces the maintenance cost, because only the relatively inexpensive valve seat 6 component needs to be replaced, rather than the large and critical component of the valve body 1.

[0033] From the manufacturing process point of view, the detachable valve seat 6 simplifies the machining difficulty of the valve body 1. If the valve seat 6 is designed as an integrated part of the valve body 1, additional high-precision molds and complex machining processes are required to ensure the dimensional accuracy, surface finish and sealing performance of the valve seat 6 part during casting or machining of the valve body 1. With the detachable connection, the machining focus of the valve body 1 can be concentrated on ensuring the basic structural accuracy of the inner cavity, the intermediate valve wall 4 and the communication port 5, and the subsequent manufacturing of the valve seat 6 can be optimized separately, using more specialized and efficient processes, which improves the overall production efficiency and reduces the risk of scrap rate.

[0034] The lower end of the valve seat 6 is detachably connected with a filter screen 7, which is a very innovative and practical design. In order to fix the filter screen, traditional filtering stop valves often need to process complex installation structures in the valve body 1, such as grooving, setting protrusions, threaded holes, etc. These additional machining operations not only consume a lot of time and increase the manufacturing cost of the valve body 1, but also make the subsequent cleaning and maintenance more difficult due to the complexity of the internal structure of the valve body 1. Some narrow installation grooves can even become dead corners for impurities to accumulate.

[0035] The filter screen 7 is located in the left valve cavity 2. As a direct executor of filtering impurities and ensuring the purity of the fluid.

[0036] In this application, the filter screen 7 is detachably connected to the lower end of the valve seat 6, which means that the manufacturing process of the valve body 1 can return to a relatively simple standard process without the need for special customization of processing steps for the filter screen 7.

[0037] In summary, through the ingenious cooperation between the valve body 1, the intermediate valve wall 4, the communication port 5, the detachable valve seat 6, and the detachable filter screen 7, the stop valve with filtering function of the present application effectively solves the problems of high manufacturing cost and difficult maintenance of traditional similar products, and provides a more efficient, reliable and economical solution for the field of fluid conveying and filtering.

[0038] The fluid enters the left valve cavity 2 and then enters the right valve cavity 3 after being filtered by the filter screen 7.

[0039] When it is necessary to replace filter screens 7 of different precision and material to adapt to different working conditions, the operator only needs to disassemble the valve seat 6 to complete the disassembly of the filter screen 7.

[0040] The detachable connection structure of the valve seat 6 is provided with the following two implementation structures in this application:

[0041] Implementation structure one: an annular limiting ring 8 is arranged on the outer side wall of the upper end of the valve seat 6, and a fastening nut 9 is connected to the lower end of the valve seat 6. The valve seat 6 is fixedly connected with the intermediate valve wall 4 under the cooperation of the fastening nut 9 and the limiting ring 8. Both of them jointly build a reliable axial fixation mechanism. The valve seat 6 is fixed by tightening the fastening nut 9. When it is necessary to install the valve seat 6, the operator first aligns the valve seat 6 from the upper valve port 13 to the communication port 5 and installs it, so that the limiting ring 8 is attached to the corresponding position of the intermediate valve wall 4. At this time, the lower end of the valve seat 6 extends into the left valve cavity 2 through the communication port 5, so as to facilitate the subsequent installation of the fastening nut 9.

[0042] The fastening nut 9 is located in the cylindrical area of the left valve port 11, which facilitates the installation of the fastening nut 9 from the left valve port 11 and facilitates the use of a wrench to operate the fastening nut 9 from the left valve port 11. By tightening the fastening nut 9, the valve seat 6 is tightly fixed along the axial direction between the communication port 5 and the intermediate valve wall 4.

[0043] The limiting ring 8 plays an axial positioning role in the installation of the valve seat 6, ensuring that the valve seat 6 is accurately positioned at the communication port 5, and ensuring the sealing and connecting effect in the subsequent process.

[0044] The outer side wall of the upper end of the valve seat 6 is provided with an annular limiting ring 8, and the lower end of the valve seat 6 is threadedly connected with the communication port 5. The middle valve wall 4 around the communication port 5 is thickened, and the sufficient wall thickness can provide sufficient material basis for machining threads on the inner side wall of the communication port 5, so as to ensure that the machined threads have sufficient length to achieve the tight and reliable connection of the valve seat 6 and the communication port 5. When the valve seat 6 is screwed into the communication port 5, the valve seat 6 is well constrained in the axial and radial directions due to the meshing of the threads, effectively resisting various external force disturbances caused by fluid pressure and valve operation, and maintaining a stable sealing state.

[0045] The thickened middle valve wall 4 enables the use of conventional thread machining equipment and process to complete the thread machining of the inner side wall of the communication port 5 when manufacturing the valve body 1, without the need to introduce special and high-precision thin-wall thread machining technology, thereby reducing the manufacturing difficulty and cost of the valve body 1.

[0046] Meanwhile, during subsequent maintenance, if the valve seat 6 needs to be replaced, maintenance personnel only need to use corresponding tools to screw out the old valve seat 6 and screw in the new valve seat 6, and the operation process is simple and clear, further embodying the convenience and superiority of this structure design in practical application, and providing a strong guarantee for large-scale production, promotion and long-term stable operation of the product.

[0047] The filter screen 7 is cylindrical, hollow inside and open upward, and has a plurality of through holes on the side wall.

[0048] The lower end of the valve seat 6 is provided with an annular connecting groove 10, and the upper end of the cylindrical filter screen 7 is adapted to be inserted into the connecting groove 10. The filter screen 7 is constrained in two dimensions, radial and axial. In the radial direction, the inner wall of the connecting groove 10 tightly fits the outer wall of the filter screen 7, preventing the filter screen 7 from shaking or rotating, and ensuring that the filter screen 7 always maintains a stable filtering position under fluid impact; in the axial direction, the bottom of the connecting groove 10 supports the upper end of the filter screen 7, so that the filter screen 7 cannot easily sink out of connection. Compared with traditional fixing methods such as welding and riveting, this connection method has obvious advantages. On the one hand, it realizes the detachable connection of the filter screen 7 and the valve seat 6, and when the filter screen 7 needs to be replaced, the operator only needs to exert a certain external force to pull out the filter screen 7 from the connecting groove 10, without damaging the structure of the filter screen 7 or the valve seat 6, and the operation is simple and fast, reducing the maintenance cost and time cost; on the other hand, in the production and manufacturing link, this plug-in connection facilitates the assembly operation of the production line, improving the production efficiency.

[0049] In the up-down direction, the distance from the lower end of the valve seat 6 to the bottom wall of the valve body 1 is less than the height of the filter screen 7. First, when the filter screen 7 is fixedly limited between the lower end of the valve seat 6 and the bottom wall of the valve body 1, it means that the bottom of the filter screen 7 is in close contact with the bottom wall of the valve body 1, at which time the filter screen 7 obtains the most stable support state. When the fluid flows through the left valve chamber 2 and impacts the filter screen 7, the filter screen 7 can stably resist the impact force of the fluid by virtue of the support of the bottom and the connection with the valve seat 6, ensuring the smooth progress of the filtering process and avoiding the problems of filtering failure or impurity leakage caused by the shaking of the filter screen 7.

[0050] Secondly, considering the complexity of the actual working condition, the filter screen 7 is also allowed to move within a certain range between the lower end of the valve seat 6 and the bottom wall of the valve body 1, as long as it does not deviate from the connection with the upper connecting groove 10 of the valve seat 6. This flexible design is to adapt to some special situations, such as when the fluid contains large block impurities, the impurities may push the filter screen 7 to move slightly during the impact on the filter screen 7, at which time if the filter screen 7 is completely fixed, it may be damaged due to bearing too much impact force. By allowing a certain moving space, the filter screen 7 can buffer part of the impact force through its own displacement, playing a self-protection role, while maintaining the stability of the connection with the valve seat 6, ensuring the filtering function is not affected, further improving the adaptability and reliability of the entire stop valve in complex fluid environment.

[0051] Moreover, this slight movement also allows a certain error in the axial direction of the size of the filter screen 7, without the need to completely adapt to the installation distance between the valve seat 6 and the bottom wall of the valve body 1.

[0052] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A shut-off valve with a filtering function, comprising a valve body, wherein the valve body has an intermediate valve wall that divides the inner cavity of the valve body into a left valve cavity and a right valve cavity, and the intermediate valve wall has a communication port connecting the left valve cavity and the right valve cavity, characterized in that: The communication port is detachably connected with an annular valve seat, and the lower end of the valve seat is detachably connected with a filter screen.

2. The shut-off valve with filtering function according to claim 1, characterized in that: An annular limiting ring is arranged on the outer side wall of the upper end of the valve seat, and the lower end of the valve seat is connected with a fastening nut.

3. The shut-off valve with filtering function according to claim 1, characterized in that: An annular limiting ring is arranged on the outer side wall of the upper end of the valve seat, and the lower end of the valve seat is threadedly connected with the communication port.

4. A shut-off valve with filtering function according to any one of claims 1-3, characterized in that: The filter screen is cylindrical, hollow and upwardly open.

5. The shut-off valve with filtering function according to claim 4, characterized in that: The lower end of the valve seat is provided with an annular connecting groove, and the upper end of the cylindrical filter screen is inserted into the connecting groove.

6. The shut-off valve with filtering function according to claim 5, characterized in that: In the up-down direction, the distance from the lower end of the valve seat to the bottom wall of the valve body is less than the height of the filter screen.

7. The shut-off valve with filtering function according to claim 4, characterized in that: The side wall of the filter screen is respectively provided with a plurality of through holes.

8. The shut-off valve with filtering function according to claim 2, characterized in that: The left side of the valve body is provided with a left valve port, and the fastening nut is located in the cylindrical area of the left valve port.

9. The shut-off valve with filtering function according to claim 1, characterized in that: The upper side of the valve body is provided with an upper valve port coaxially corresponding to the communication port.

10. The shut-off valve with filtering function according to claim 3, characterized in that: The intermediate valve wall around the communication port is thickened.

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