Wear-resistant and anti-seepage sealing stop valve for oil depot

Abstract

The utility model is suitable for valve technical field, especially relates to a wear -resisting anti -infiltration sealing stop valve for oil depot, including stop valve core main part, the surface of stop valve core main part is equipped with conical sealing surface, and the middle section area of conical sealing surface is equipped with installation recess, the inside of installation recess is provided with sealing ring. The utility model discloses a valve core outer surface is set as conical sealing surface, and sets up installation recess for accommodating sealing ring in the middle section, in the valve closing process, conical sealing surface first and valve seat inner wall are pasted and form metal hard sealing structure, bear main sealing pressure, sealing ring is further tightly butted with valve seat after being compressed in installation recess, fills up the tiny gap of sealing interface and absorbs the impact force in the opening and closing process, to form the double sealing system of hard sealing and elastic sealing combination.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a wear-resistant and leak-proof sealing stop valve for oil depots. Background Technology

[0002] Gate valves are widely used in fluid transport systems such as oil depots, refined oil transportation, and petrochemical pipelines to control the opening and closing of media. In high-frequency operating environments such as oil depots, the reliability of the sealing performance of gate valves is directly related to safe production and pollution control.

[0003] Most common gate valves employ a metal hard seal structure, meaning both the valve core and seat are made of metal. Under conditions of frequent opening and closing or high flow velocity, repeated friction and compression between the sealing surfaces can easily lead to wear, indentation, and even deformation, resulting in a decline in sealing performance. Typically, after a few months of use, problems such as incomplete closure and minor leaks will appear. To restore normal sealing performance, it is often necessary to replace the entire valve or disassemble the valve body for maintenance of the seals. This repair process requires disconnecting the pipeline and is performed by qualified personnel, resulting in long downtime, disruption of delivery continuity, and high labor costs.

[0004] In addition, the installation structure of the internal sealing ring of existing gate valves generally lacks limit protection or buffer structure, which makes the sealing ring susceptible to shear and compression damage during opening and closing, resulting in a short service life and high maintenance frequency. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a wear-resistant and leak-proof sealing stop valve for oil depots, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wear-resistant and leak-proof sealing stop valve for oil depots includes a valve core body. The valve core body has a conical sealing surface on its surface, and a mounting groove is formed in the middle section of the conical sealing surface. A sealing ring is provided inside the mounting groove.

[0008] Furthermore, the sealing ring is made of fluororubber.

[0009] Furthermore, the two sides of the mounting groove are respectively provided with a first chamfer and a second chamfer.

[0010] Furthermore, the mounting groove has a first receiving groove inside, and the first receiving groove has a second receiving groove inside. A guide rod is slidably connected inside the second receiving groove, and one end of the guide rod is connected to an ejector block, which is made of ferromagnetic material.

[0011] Furthermore, the shape of the ejector block matches the cross-sectional shape of the first receiving groove, and the thickness of the ejector block is consistent with the groove depth of the first receiving groove; the longitudinal cross-sectional shape of the guide rod matches the internal contour of the second receiving groove.

[0012] The wear-resistant and leak-proof sealing stop valve for oil depots provided by this utility model has the following beneficial effects:

[0013] This invention sets the outer surface of the valve core as a conical sealing surface and opens an installation groove in the middle section to accommodate the sealing ring. During the valve closing process, the conical sealing surface first fits against the inner wall of the valve seat to form a metal hard seal structure, which bears the main sealing pressure. After being compressed in the installation groove, the sealing ring further abuts tightly against the valve seat, filling the tiny gaps at the sealing interface and absorbing the impact force during the opening and closing process, thereby forming a dual sealing system that combines hard sealing and elastic sealing.

[0014] This sealing structure can effectively reduce the risk of leakage caused by wear of metal sealing surfaces, extend the service life of sealing components, and maintain stable and reliable sealing performance under frequent opening and closing conditions such as oil depots and petrochemical fluid transportation, significantly improving the safety of equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a wear-resistant and leak-proof sealing stop valve for oil depots.

[0016] Figure 2 This is a partial structural schematic diagram of a wear-resistant and leak-proof sealing stop valve for oil depots.

[0017] Figure 3 This is an enlarged view of point A in a wear-resistant and leak-proof sealing stop valve used in oil depots.

[0018] Figure 4 This is a schematic diagram of the structure of a wear-resistant and leak-proof sealing stop valve for oil depots when it is designed with a top outlet block.

[0019] Figure 5 This is a schematic diagram of the structure of a wear-resistant and leak-proof sealing stop valve for oil depots when the ejector block is in a separated state.

[0020] In the figure: 1. Gate valve core body; 2. Conical sealing surface; 3. Mounting groove; 4. Sealing ring; 5. First chamfer; 6. Second chamfer; 7. Guide rod; 8. Ejector block; 9. First receiving groove; 10. Second receiving groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] like Figures 1-3 As shown in the figure, the present invention provides a wear-resistant and leak-proof sealing stop valve for oil depots, including a stop valve core body 1, a conical sealing surface 2 on the surface of the stop valve core body 1, and an installation groove 3 in the middle section of the conical sealing surface 2, and a sealing ring 4 is provided inside the installation groove 3.

[0024] In one embodiment of this utility model, when the valve is open, the valve core body 1 of the shut-off valve is in an upward position, the conical sealing surface 2 is completely separated from the inner wall of the valve seat, and the medium can be transported freely through the valve cavity.

[0025] When the valve needs to be closed, the valve core body 1 of the gate valve is driven to move axially downward by the actuator or handwheel. As the valve core gradually descends, the conical sealing surface 2 first comes into partial contact with the inner wall of the valve seat, starting to block the flow of the medium; as it continues to move downward, the sealing ring 4 is compressed and comes into tight contact with the valve seat, forming an elastic compensation seal, so that the pressure at the sealing interface is uniform, thereby finally achieving a completely sealed closed state.

[0026] Among them, the conical sealing surface 2 forms the main metal hard seal structure, which can withstand a large contact pressure; the sealing ring 4 further fills the tiny gap between the conical sealing surface and the valve seat, which can effectively prevent the risk of leakage caused by wear and absorb the frictional impact of the valve core during frequent opening and closing.

[0027] The sealing structure of this invention can maintain high sealing stability under long-term use conditions, and is particularly suitable for use environments with strict sealing performance requirements and frequent opening and closing operations, such as oil depots, refined oil transportation and petrochemical pipelines.

[0028] The sealing ring 4 is made of fluororubber. Fluororubber has excellent oil resistance, high temperature resistance, and resistance to chemical corrosion, making it suitable for long-term use in gasoline, diesel, and various petrochemical fluid environments, and it is not prone to expansion, corrosion, or hardening failure. At the same time, fluororubber has good compression set and resilience, providing a stable sealing preload during the valve core and seat contact process, reducing wear at the sealing interface, and significantly extending the service life of the sealing assembly. Therefore, using a fluororubber sealing ring can effectively improve the sealing reliability, safety, and durability of the gate valve in oil depot applications.

[0029] In this invention, the valve seat and valve body are connected by detachable bolts. This structure allows for maintenance of the gate valve or replacement of the sealing ring 4 without disassembling the pipes at both ends of the valve or the main body of the valve body. Only a few bolts used to fix the valve seat need to be loosened to remove the valve seat and its mating valve core assembly as a whole, thus greatly simplifying the maintenance process.

[0030] The detachable connection not only reduces the specialized skills and tools required for maintenance operations but also significantly shortens valve downtime, minimizing the impact on the continuity of fluid transport in the oil depot. Simultaneously, this structure avoids the leakage risks associated with repeated opening of pipeline connections in traditional disassembly methods, thus improving system safety.

[0031] Therefore, adopting a structure in which the valve seat and valve body are detachably connected can effectively improve the maintainability, reliability and economy of the gate valve, and is especially suitable for application scenarios in oil depots that require frequent opening and closing and rapid recovery of operations.

[0032] In this embodiment, the two sides of the mounting groove 3 are respectively provided with a first chamfer 5 and a second chamfer 6.

[0033] The first chamfer 5 and the second chamfer 6 are provided to reduce the shearing and compressive stress on the sealing ring 4 during assembly and the reciprocating motion of the valve core. When the valve core body 1 moves up and down relative to the valve seat, the chamfer structure allows the sealing ring 4 to gradually transition into or out of the sealing mating area, avoiding edge scraping damage to the sealing ring and thus reducing the wear rate.

[0034] In addition, the chamfering on both sides allows the sealing ring to achieve a more reasonable stress distribution when it is deformed under pressure, preventing local stress concentration from causing permanent deformation or detachment, and further improving the service life and sealing reliability of the sealing ring.

[0035] like Figure 4 and Figure 5 As shown, in one embodiment of the present invention, a first receiving groove 9 is provided inside the mounting groove 3, and a second receiving groove 10 is provided inside the first receiving groove 9. A guide rod 7 is slidably connected inside the second receiving groove 10, and one end of the guide rod 7 is connected to an ejector block 8, which is made of ferromagnetic material.

[0036] The shape of the ejector block 8 matches the cross-sectional shape of the first receiving groove 9, and the thickness of the ejector block 8 is consistent with the groove depth of the first receiving groove 9; the longitudinal cross-sectional shape of the guide rod 7 matches the internal contour of the second receiving groove 10.

[0037] In this embodiment, when the sealing ring 4 needs to be replaced, the maintenance personnel can position the valve core body 1 in the outward maintenance position after the valve is closed and the pipeline is cut off. Then, by applying an external magnet or electromagnet, the ejector block 8 is magnetically attracted and driven to move the ejector block 8 and the guide rod 7 outward along the axial direction.

[0038] As the guide rod 7 slides outward, the ejector block 8 presses against the bottom edge of the sealing ring 4, gradually pushing the sealing ring away from the mounting groove 3, so that maintenance personnel can easily remove and replace it without directly contacting the sealing ring 4.

[0039] The ejector block 8 is made of ferromagnetic material, which can quickly respond to external magnetic force. Its shape matches the first receiving groove 9 and works in coordination with the guide rod 7. It can achieve stable linear sliding within the range defined by the second receiving groove 10, avoiding deviation and jamming.

[0040] Through the aforementioned ejection structure design, this invention eliminates the need for maintenance personnel to directly contact the sealing components with their hands or gloves during the maintenance of the sealing ring 4, effectively avoiding the safety and contamination risks associated with contact with oil media. Furthermore, this structure eliminates the need for external tools such as pry bars and screwdrivers to disassemble the sealing ring during maintenance, thus preventing direct contact between tools and the valve core body 1, which could lead to scratches, indentations, or deformation of the sealing surface. This effectively improves the long-term reliability and service life of the valve core sealing surface.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant and leak-proof sealing stop valve for oil depots, comprising a stop valve core body (1), characterized in that, The valve core body (1) of the shut-off valve has a conical sealing surface (2) on its surface, and a mounting groove (3) is provided in the middle section of the conical sealing surface (2). A sealing ring (4) is provided inside the mounting groove (3).

2. The wear-resistant and leak-proof sealing stop valve for oil depots according to claim 1, characterized in that, The sealing ring (4) is made of fluororubber.

3. The wear-resistant and leak-proof sealing stop valve for oil depots according to claim 1, characterized in that, The mounting groove (3) has a first chamfer (5) and a second chamfer (6) on its two sides respectively.

4. The wear-resistant and leak-proof sealing stop valve for oil depots according to claim 1, characterized in that, The mounting groove (3) has a first receiving groove (9) inside, and the first receiving groove (9) has a second receiving groove (10) inside. The second receiving groove (10) is slidably connected to a guide rod (7), and one end of the guide rod (7) is connected to an ejector block (8). The ejector block (8) is made of ferromagnetic material.

5. The wear-resistant and leak-proof sealing stop valve for oil depots according to claim 4, characterized in that, The shape of the ejector block (8) matches the cross-sectional shape of the first receiving groove (9), and the thickness of the ejector block (8) is consistent with the groove depth of the first receiving groove (9); the longitudinal cross-sectional shape of the guide rod (7) matches the internal contour of the second receiving groove (10).

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