Valve core for protecting sealing surface

Abstract

The utility model relates to the technical field of valve cores, and discloses a valve core for protecting a sealing surface, which comprises a valve body, a valve core component, a first guide plate and a second guide plate. A fluid channel and a control cavity which are perpendicular to each other and communicated with each other are formed in the valve body; a water inlet and a water outlet are respectively formed in two ends of the fluid channel; the control chamber vertically penetrates through the upper part of the fluid channel and is used for mounting the valve core assembly; the valve element assembly comprises a valve seat and a valve rod. The valve seat is arranged at the intersection of the fluid channel and the control cavity in a sealed mode, and the sealing faces on the two sides of the valve seat are opposite to the water inlet and the water outlet respectively. The valve rod penetrates through the control cavity in the axial direction of the control cavity in a lifting mode, and the lower end of the valve rod extends into the fluid channel and is fixedly connected with the valve seat. When the valve rod drives the valve seat to do axial lifting motion, the sealing faces on the two sides of the valve seat synchronously form a sealing state with the water inlet and the water outlet or release the sealing state with the water inlet and the water outlet correspondingly, so that a fluid path is blocked or conducted, and the gate closing or opening function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve core technology, specifically a valve core for protecting the sealing surface. Background Technology

[0002] In the existing valve core structure, the valve core is the core component for controlling the flow of fluid, and its sealing performance directly affects the reliability and service life of the valve core.

[0003] The existing valve cores have the following problems with the sealing surface of the valve seat: the sealing surface is usually directly exposed to the impact of fluid, especially during the opening and closing process. The scouring and wear caused by the fluid on the sealing surface is quite serious, which can easily lead to sealing failure and thus affect the overall performance of the valve core.

[0004] Therefore, there is an urgent need for a valve core that protects the sealing surface to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a valve core that protects the sealing surface, so as to solve the problem that fluid erosion of the sealing surface can easily cause wear to the sealing surface.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A valve core for protecting the sealing surface, comprising:

[0008] The valve body has a fluid channel and a control chamber that are perpendicular to each other and communicate with each other. The two ends of the fluid channel are respectively formed as an inlet and an outlet. The control chamber extends vertically through the top of the fluid channel and is used to install the valve core assembly.

[0009] The valve core assembly includes a valve seat and a valve stem; the valve seat is sealed at the junction of the fluid channel and the control chamber, and the sealing surfaces on both sides of the valve seat are opposite to the inlet and the outlet, respectively; the valve stem is axially and vertically inserted into the control chamber, and its lower end extends into the fluid channel and is fixedly connected to the valve seat; when the valve stem drives the valve seat to move axially up and down, the sealing surfaces on both sides of the valve seat synchronously form a sealing state or release the sealing state with the inlet and the outlet, respectively, thereby blocking or opening the fluid path and realizing the gate closing or gate opening function;

[0010] The valve seat has a first guide plate and a second guide plate on at least one side. The first guide plate and the second guide plate are respectively disposed on the inner wall of the fluid channel. They are arranged opposite to each other and staggered, and are directly facing the sealing surface of the valve seat on that side, so as to divert and buffer the direct impact of the fluid on the sealing surface.

[0011] As a preferred embodiment of a valve core for protecting the sealing surface, the first guide plate and the second guide plate have three-dimensional textures on the sides opposite to the valve seat. The three-dimensional textures are used to increase the flow resistance of the fluid and reduce the direct impact of the fluid on the sealing surface of the valve seat.

[0012] As a preferred embodiment of the valve core for protecting the sealing surface, both the first guide plate and the second guide plate are inclined in a direction away from the sealing surface of the valve seat.

[0013] As a preferred embodiment of a valve core for protecting the sealing surface, a connecting cylinder is provided inside the fluid channel, the axis of the connecting cylinder coincides with the axis of the fluid channel, the internal flow channel of the connecting cylinder coincides with and is connected to the fluid channel, and the first guide plate and the second guide plate are fixed to the inner wall of the connecting cylinder.

[0014] As a preferred embodiment of a valve core for protecting the sealing surface, the outer side of the connecting cylinder is provided with a first thread, and the fluid passage is provided with a second thread for engaging with the first thread.

[0015] As a preferred embodiment of a valve core for protecting the sealing surface, the connecting cylinder and the fluid channel are fixedly connected by fasteners.

[0016] As a preferred embodiment of the valve core for protecting the sealing surface, a filter screen is provided at the inlet of the fluid channel, which is used to remove impurities from the fluid before it enters the valve body.

[0017] As a preferred embodiment of a valve core for protecting the sealing surface, the valve seat has a tapered structure, with its width gradually narrowing from top to bottom along the axial direction of the control chamber, forming a conical contraction section.

[0018] As a preferred embodiment of a valve core for protecting the sealing surface, a guide cylinder is installed on the inner wall of the control chamber. The guide cylinder is sleeved on the outer periphery of the valve stem and is used to guide and support the lifting and lowering movement of the valve stem.

[0019] As a preferred embodiment of a valve core for protecting the sealing surface, a sealing sleeve is installed on the top of the control chamber, and the valve stem passes through the sealing sleeve, which is used to achieve a sealed isolation between the valve stem and the control chamber.

[0020] The beneficial effects of this invention are as follows: By providing a first guide plate and a second guide plate that are arranged oppositely and staggered on at least one side of the valve seat, and positioning them directly opposite the valve seat sealing surface, the flow direction of the fluid can be effectively guided, the impact energy of the fluid can be dispersed, and the direct impact force of high-speed fluid on the sealing surface can be reduced. This not only improves the stability of the valve core during the opening and closing process, but also effectively extends the service life of the sealing surface and reduces the problem of seal failure caused by fluid erosion. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a valve core with a protective sealing surface in the first direction provided by this utility model;

[0022] Figure 2 A schematic diagram of the overall structure of a valve core with a protective sealing surface in the second direction provided by this utility model;

[0023] Figure 3 A cross-sectional view of a valve core with a protective sealing surface provided by this utility model;

[0024] Figure 4 for Figure 3 A partially enlarged schematic diagram of the valve core with the middle protective sealing surface;

[0025] Figure 5 A plan view of a valve core for protecting the sealing surface provided by this utility model.

[0026] The following are the labeling elements in the figure:

[0027] 1. Valve body; 2. Fluid passage; 3. Control chamber; 4. Inlet; 5. Outlet; 6. First guide plate; 7. Second guide plate;

[0028] 8. Valve core assembly; 801. Valve seat; 802. Valve stem;

[0029] 9. Filter screen; 10. Guide cylinder; 11. Sealing sleeve; 12. Three-dimensional texture; 13. Connecting cylinder; 14. First thread; 15. Second thread; 16. Fastener; 17. Sealing surface. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0035] In one embodiment of this utility model, such as Figure 1-5 As shown, a valve core with a protective sealing surface 17 is provided, comprising: a valve body 1, a valve core assembly 8, a first guide plate 6, and a second guide plate 7. The valve body 1 has a fluid channel 2 and a control chamber 3 that are perpendicular and interconnected. An inlet 4 and an outlet 5 are formed at both ends of the fluid channel 2, respectively. The control chamber 3 extends vertically above the fluid channel 2 and is used to install the valve core assembly. The valve core assembly 8 includes a valve seat 801 and a valve stem 802. The valve seat 801 is sealed at the junction of the fluid channel 2 and the control chamber 3, and the sealing surfaces 17 on both sides of the valve seat 801 are opposite to the inlet 4 and the outlet 5, respectively. The valve stem 802 is vertically and flexibly inserted into the control chamber 3 along its axial direction, with its lower end extending into the fluid channel. 2. The valve is fixedly connected to the valve seat 801. When the valve stem 802 drives the valve seat 801 to move axially up and down, the sealing surfaces 17 on both sides of the valve seat 801 are synchronously sealed or unsealed with the inlet 4 and outlet 5, respectively, thereby blocking or opening the fluid path and realizing the gate closing or opening function. At least one side of the valve seat 801 is provided with a first guide plate 6 and a second guide plate 7. The first guide plate 6 and the second guide plate 7 are respectively set on the inner wall of the fluid channel 2. They are arranged opposite to each other and staggered, and face the sealing surface 17 on that side of the valve seat 801, which is used to divert and buffer the direct impact of the fluid on the sealing surface 17.

[0036] The valve core with protective sealing surface 17 provided by this utility model, by providing a first guide plate 6 and a second guide plate 7 arranged oppositely and staggered on at least one side of the valve seat 801 and facing the sealing surface 17 of the valve seat 801, can effectively guide the direction of fluid flow, disperse the fluid impact energy, and reduce the direct impact force of high-speed fluid on the sealing surface 17. This not only improves the stability of the valve core during the opening and closing process, but also effectively extends the service life of the sealing surface 17 and reduces the problem of sealing failure caused by fluid erosion.

[0037] Preferably, a filter screen 9 is provided at the inlet 4 of the fluid channel 2. The filter screen 9 is fixed to the inner wall of the inlet 4 by means of snap-fit ​​or threaded connection. The filter screen 9 effectively prevents particulate matter from entering the valve body 1, protects the sealing surface 17 from damage, and improves the service life and working stability of the valve core.

[0038] Preferably, the valve seat 801 has a tapered structure, with its width gradually narrowing from top to bottom along the axial direction of the control chamber 3, forming a conical contraction section. When the valve is closed, the sharp edge of this conical contraction section can quickly cut into the fluid medium, achieving rapid cutoff of the flow channel.

[0039] Preferably, the guide cylinder 10 is fixed to the inner wall of the control chamber 3 by interference fit or threaded connection, and is sleeved on the outer periphery of the valve stem 802. The guide cylinder 10 is used to guide and support the lifting and lowering action of the valve stem 802. The guide cylinder 10 effectively improves the movement stability of the valve stem 802, prevents deviation and jamming, and enhances the sensitivity of valve core opening and closing and sealing reliability.

[0040] Preferably, the sealing sleeve 11 is located at the top of the control chamber 3, and the valve stem 802 passes through the sealing sleeve 11. The sealing sleeve 11 is used to achieve a sealed isolation between the valve stem 802 and the control chamber 3. The sealing sleeve 11 effectively prevents media leakage and improves sealing reliability.

[0041] In this embodiment, the handwheel is detachably mounted on the top of the valve stem 802 via a key connection or threaded connection, and is used for manual rotation to close or open the valve.

[0042] Preferably, both the first guide plate 6 and the second guide plate 7 are inclined in a direction away from the sealing surface 17 of the valve seat 801. This effectively guides the fluid flow, avoids direct impact on the sealing surface 17, reduces erosion wear, and improves sealing performance and service life.

[0043] Preferably, the first guide plate 6 and the second guide plate 7 have three-dimensional textures 12 on their sides opposite to the valve seat 801. The three-dimensional textures 12 are used to increase the contact area with the fluid and reduce the direct impact of the fluid on the sealing surface 17 of the valve seat 801. In this embodiment, the three-dimensional textures 12 can be raised stripes, wavy grooves, or dot matrix relief structures.

[0044] Preferably, a connecting cylinder 13 is provided inside the fluid channel 2, the axis of the connecting cylinder 13 coincides with the axis of the fluid channel 2, the internal flow channel of the connecting cylinder 13 coincides with and is connected to the fluid channel 2, and the first guide plate 6 and the second guide plate 7 are fixed to the inner wall of the connecting cylinder 13.

[0045] The connecting sleeve 13 makes the guide plate detachable, which is convenient for later maintenance and replacement; compared with the one-piece molded valve body 1 structure, this design effectively reduces maintenance costs and improves economy.

[0046] Specifically, the outer side of the connecting cylinder 13 is provided with a first thread 14, and the fluid channel 2 is provided with a second thread 15 for engaging with the thread. The threaded connection enables quick installation and disassembly of the connecting cylinder 13, which is simple and reliable in structure, facilitates the maintenance and replacement of the guide plate, and improves assembly efficiency and valve core maintainability.

[0047] In another embodiment, the connecting cylinder 13 and the fluid channel 2 are fixedly connected by fasteners 16 (such as screws). Using screw fastening achieves a stable installation of the connecting cylinder 13, resulting in a simple structure, easy disassembly and maintenance, and improved assembly flexibility and maintainability.

[0048] The water flow process during the closure of the valve in this utility model is as follows: the fluid enters the valve body 1 from the inlet 4, first passes through the filter screen 9 to remove impurities, and then flows through the first guide plate 6 and the second guide plate 7 in the connecting cylinder 13. The structure of the first guide plate 6 and the second guide plate 7 are opposite and staggered, and the three-dimensional texture 12 effectively disperses the fluid impact force and reduces its direct scouring of the sealing surface 17 of the valve seat 801.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A poppet having a protective seal surface, characterized in that The utility model relates to a valve body, the valve body inside forms the fluid passage and control chamber mutually perpendicular and lead through, the both ends of fluid passage form water inlet and water outlet respectively, control chamber vertically through in the top of fluid passage, control chamber is used to install valve core subassembly, the valve core subassembly includes valve seat and valve rod, the valve seat sealed setting is in the confluence of fluid passage and control chamber, the sealing surface of valve seat two sides is opposite with water inlet and water outlet respectively, the valve rod is along the axial direction of control chamber and is lifted and is passed in control chamber, and its lower end extends to the fixed connection in fluid passage with valve seat, when the valve rod drives valve seat to do the axial lifting movement, the sealing surface of valve seat two sides is opposite with water inlet and water outlet respectively synchronous formation sealed state or unsealing state, thereby blocking or lead through fluid path, realize the function of closing or opening gate, at least one side of valve seat is equipped with first guide plate and second guide plate, first guide plate and second guide plate set up in the inner wall of fluid passage respectively, and they are opposite and staggered arrangement, and the sealing surface of valve seat is opposite to the side, for shunting buffering fluid direct impact to the sealing surface. The side surface of the first guide plate and the second guide plate away from the sealing surface of the valve seat is provided with a three-dimensional texture, and the three-dimensional texture is used for increasing the flow resistance of the fluid and reducing the direct impact of the fluid on the sealing surface of the valve seat. The first guide plate and the second guide plate are inclined away from the sealing surface of the valve seat. The fluid passage is provided with a connecting cylinder, the axis of the connecting cylinder coincides with the axis of the fluid passage, the internal flow passage of the connecting cylinder coincides with the fluid passage and is in communication, and the first guide plate and the second guide plate are fixed to the inner wall of the connecting cylinder.

2. A poppet according to claim 1, wherein The outer side of the connecting cylinder is provided with a first thread, and the fluid passage is provided with a second thread for screwing with the thread.

3. A poppet according to claim 1 or 2, wherein, The connecting cylinder and the fluid passage are fixedly connected by a fastener.

4. A poppet according to claim 1 or 2, wherein The water inlet of the fluid passage is provided with a filter screen, and the filter screen is used to remove impurities in the fluid before entering the valve body.

5. A poppet according to claim 4, wherein, The valve seat is of a tapered structure, and the width gradually narrows from top to bottom along the axial direction of the control chamber, forming a tapered contraction section.

6. A poppet according to claim 4, wherein A guide cylinder is mounted on the inner wall of the control chamber, the guide cylinder is sleeved on the outer periphery of the valve rod, and the guide cylinder is used for guiding and supporting the lifting action of the valve rod.

7. A poppet according to claim 1 or 2 or 5 or 6, wherein, A sealing sleeve is mounted on the top of the control chamber, the valve rod passes through the sealing sleeve, and the sealing sleeve is used for sealing and isolating the valve rod and the control chamber.

8. A poppet according to claim 1 or 2 or 5 or 6, wherein, ​ 9. A poppet according to claim 1 or 2 or 5 or 6, wherein, ​ 10. A poppet according to claim 1 or 2 or 5 or 6, wherein, ​

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