A sealed connection safety gasket and valve

Abstract

The application discloses a sealed connection safety gasket and valve, which comprises a cylindrical main body sealing column and a through assembly hole in the center. An annular bearing plate is arranged at the axial middle position of the assembly hole, and limiting protrusions are arranged on the two side surfaces of the bearing plate. A tapered guide surface is arranged at the port of the assembly hole, a spiral flow guide groove is arranged on the inner wall behind the guide surface, an elastic scraping edge is arranged at the edge of the flow guide groove, and the tail end is connected with an annular dirt collecting groove. The gasket is installed at the connection port of the valve, and the end part of the pipeline is inserted into the assembly hole, and the end surface groove is matched with the limiting protrusions. The gasket can remove the adhering matters on the outer wall of the pipeline through the scraping edge, and the adhering matters are guided to the dirt collecting groove through the flow guide groove, and the rotation is prevented through the limiting protrusions, so that the problems of large insertion resistance, gasket displacement and insufficient connection stability caused by pollutants in the assembly of heavy pipelines are solved, and the assembly efficiency and sealing reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve sealing gaskets, in particular to a sealing connection safety gasket and a valve. BACKGROUND

[0002] The sealing performance of the connection between the valve and the pipeline directly affects the safety and stability of the fluid conveying system. At present, the valve sealing gasket is mostly made of a rigid main body structure matched with an internal limiting plate to realize the positioning and sealing of the pipeline end, for example, a valve sealing combination safety gasket disclosed in Chinese patent CN223387975U, which improves the position stability and sealing reliability of installation by setting a first limiting plate, a second limiting plate and a second assembly limiting column. To some extent, this kind of structure improves the problems of easy displacement and poor bearing capacity of traditional rubber gaskets.

[0003] However, in actual industrial sites, especially in the process of installing heavy pipelines, due to the attachment of oil stains, dust or metal debris on the outer wall and end face of the pipeline, and the difficulty in centering the pipeline and the limited operation space, the pipeline is prone to deflection or jam when inserted into the gasket, which brings challenges to the efficient assembly and reliable sealing of the sealing gasket. Although the existing valve sealing combination safety gasket is provided with a guide chamfer structure, its function is limited to providing basic assembly guide, and it cannot process the attachments on the end face of the pipeline. When the heavy pipeline with attachments is inserted, the attachments will be squeezed between the inner wall of the gasket and the outer wall of the pipeline, resulting in a significant increase in the contact friction force between them; in order to ensure that the pipeline is inserted in place, the operator needs to exert a greater axial pushing force, which is easy to cause the gasket to move slightly in the installation clamp, and then cause local high stress contact damage on the outer wall of the pipeline and the sealing area. In addition, the traditional gasket lacks effective pipeline rotation limiting structure, and the pipeline may still rotate due to external force after being installed in place, affecting the long-term stability of the connection. This damage not only destroys the coaxiality of the connection, but also affects the integrity of the sealing structure, resulting in a decrease in sealing reliability during long-term use, and even causing the risk of medium leakage. Therefore, it is urgent to improve the existing technology to solve the problems of installation difficulty and insufficient connection stability caused by pollutants in the assembly of heavy pipelines. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a sealing connection safety gasket and a valve to solve the problems of large insertion resistance, gasket displacement, sealing area damage and poor rotation stability caused by attachments on the outer wall of the pipeline in the assembly of heavy pipelines.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A sealed connection safety washer comprises a cylindrical main sealing column, a through central assembly hole is formed in the center of the main sealing column, an annular bearing plate is arranged at the axial middle position of the central assembly hole, the plate surface of the annular bearing plate is perpendicular to the axial direction of the central assembly hole, limit protrusions are arranged on both sides of the annular bearing plate in the upward and downward pipeline insertion direction, tapered guide surfaces are arranged on the upper and lower end port edges of the central assembly hole, helical flow guide grooves are formed on the inner wall of the central assembly hole behind the tapered guide surfaces, the helical flow guide grooves extend along the pipeline insertion direction, scraping edges are arranged on the edges of the helical flow guide grooves, an annular dirt collecting groove is arranged at the junction position of the annular bearing plate and the inner wall of the central assembly hole, the annular dirt collecting groove extends along the circumference of the inner wall of the central assembly hole, and the end of the helical flow guide groove communicates with the annular dirt collecting groove.

[0007] Further, the number of helical flow guide grooves is multiple, and the helical flow guide grooves are uniformly distributed along the circumferential direction of the inner wall of the central assembly hole.

[0008] Further, the scraping edges are arranged on the edges of the helical flow guide grooves close to the annular bearing plate, and the scraping edges are formed by covering with an elastic material.

[0009] Further, the cross-sectional shape of the helical flow guide groove is arc-shaped or U-shaped.

[0010] Further, the depth and width of the annular dirt collecting groove are greater than the depth and width of the helical flow guide groove.

[0011] Further, the number of limit protrusions is multiple, and the limit protrusions are uniformly distributed along the circumferential direction of the annular bearing plate.

[0012] Further, the tapered arc surface of the tapered guide surface is smooth, and the generatrix of the tapered guide surface forms an acute angle with the axis of the central assembly hole.

[0013] A valve comprises a valve body, a pipeline, and the above-mentioned sealed connection safety washer, the sealed connection safety washer is installed at the pipeline connection port of the valve body, the end of the pipeline is inserted into the central assembly hole of the sealed connection safety washer, the end surface of the pipeline is provided with a groove structure matched with the limit protrusion, and the end surface of the pipeline abuts against the side surface of the annular bearing plate.

[0014] The core of the present application is that through the synergistic effect of the spiral guide groove and the scraping edge, the adhering matter on the outer wall is actively removed during pipe insertion, and the pollutants are guided into the pollution collection groove through the guide groove, while the rotation is prevented by the cooperation of the limiting protrusion and the pipe groove. Compared with the prior art, the present application has the following advantages: first, the scraping edge scrapes off the pollutants during pipe insertion, reducing the insertion resistance and avoiding the displacement of the gasket caused by the unintended thrust of the operator; second, the annular pollution collection groove effectively collects the pollutants, preventing them from entering the sealing area and improving the sealing reliability; finally, the cooperation of the limiting protrusion and the pipe groove ensures the anti-rotation stability of the connection, prolonging the service life. The present application has the advantages of simple and reliable structure, low cost, perfect combination of convenience, stability and economy for heavy pipe assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the overall structure of the safety gasket for sealing connection of the present application.

[0016] Figure 2 It is a top view of the safety gasket for sealing connection of the present application.

[0017] Figure 3 It is a schematic view of the cross-sectional structure at I-I. Figure 2

[0018] It is a schematic view of the cross-sectional structure at I-I. Figure 4 Figure 1 It is a partial enlarged schematic view of the spiral guide groove and the scraping edge in area A.

[0019] Figure 5 It is a partial enlarged schematic view of the spiral guide groove and the scraping edge in area B. Figure 3

[0020] Figure 6 It is a schematic view of the assembly of the gasket, valve and pipe.

[0021] In the figure, each reference numeral represents:

[0022] 1, main sealing column; 2, center assembly hole; 3, annular bearing plate; 31, limiting protrusion; 4, conical guide surface; 5, spiral guide groove; 51, scraping edge; 6, annular pollution collection groove; 7, valve body; 8, pipe; 81, groove structure. DETAILED DESCRIPTION

[0023] 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 a part 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. ​​

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] Please refer to Figures 1 to 6 The sealing connection safety gasket and valve provided by the embodiment have the advantages that the cylindrical main sealing column is made of high-strength stainless steel and has excellent rigidity and corrosion resistance, the through center assembly hole is provided in the center of the main sealing column for accommodating the end of the pipeline, the annular bearing plate is provided in the axial middle position of the center assembly hole, the plate surface of the annular bearing plate is perpendicular to the axis direction of the center assembly hole, the thickness of the annular bearing plate is greater than the inner wall thickness of other parts of the center assembly hole, the two sides of the annular bearing plate towards the pipeline insertion direction of the upper and lower ends of the center assembly hole are provided with the limiting protrusions, the limiting protrusions are uniformly distributed along the circumferential direction of the annular bearing plate, the limiting protrusions are used for cooperating with the groove structure of the end surface of the pipeline to limit the rotation of the pipeline after installation, the tapered guide surface is provided on the port edges of the upper and lower ends of the center assembly hole, the tapered curved surface of the tapered guide surface is smooth, the generatrix of the tapered guide surface and the axis of the center assembly hole form an acute angle of 30-60 degrees, and the tapered guide surface is used for guiding the automatic centering of the pipeline during insertion, the inner wall of the center assembly hole is provided with the spiral flow guide grooves behind the tapered guide surface, the spiral flow guide grooves are uniformly distributed along the circumferential direction of the inner wall of the center assembly hole and extend along the pipeline insertion direction, the distribution mode of the spiral flow guide grooves can ensure that the attachments in the circumferential direction of the pipeline are scraped without dead angle, and impurities are avoided from being left in local areas due to no flow guide grooves being arranged.

[0026] The annular bearing plate is integrally formed with the main sealing column, the plate surface of the annular bearing plate is perpendicular to the axis direction of the center assembly hole, the thickness of the annular bearing plate is greater than the inner wall thickness of other parts of the center assembly hole, and sufficient axial bearing capacity is provided. The two sides of the annular bearing plate towards the pipeline insertion direction of the upper and lower ends of the center assembly hole are provided with the limiting protrusions, the limiting protrusions are uniformly distributed along the circumferential direction of the annular bearing plate, the limiting protrusions are used for cooperating with the groove structure of the end surface of the pipeline to limit the rotation of the pipeline after installation.

[0027] The tapered guide surface is provided on the port edges of the upper and lower ends of the center assembly hole, the tapered curved surface of the tapered guide surface is smooth, the generatrix of the tapered guide surface and the axis of the center assembly hole form an acute angle of 30-60 degrees, and the tapered guide surface is used for guiding the automatic centering of the pipeline during insertion, the inner wall of the center assembly hole is provided with the spiral flow guide grooves behind the tapered guide surface, the spiral flow guide grooves are uniformly distributed along the circumferential direction of the inner wall of the center assembly hole and extend along the pipeline insertion direction, the distribution mode of the spiral flow guide grooves can ensure that the attachments in the circumferential direction of the pipeline are scraped without dead angle, and impurities are avoided from being left in local areas due to no flow guide grooves being arranged.

[0028] The tapered guide surface is provided on the port edges of the upper and lower ends of the center assembly hole, the tapered curved surface of the tapered guide surface is smooth, the generatrix of the tapered guide surface and the axis of the center assembly hole form an acute angle of 30-60 degrees, and the tapered guide surface is used for guiding the automatic centering of the pipeline during insertion, the inner wall of the center assembly hole is provided with the spiral flow guide grooves behind the tapered guide surface, the spiral flow guide grooves are uniformly distributed along the circumferential direction of the inner wall of the center assembly hole and extend along the pipeline insertion direction, the distribution mode of the spiral flow guide grooves can ensure that the attachments in the circumferential direction of the pipeline are scraped without dead angle, and impurities are avoided from being left in local areas due to no flow guide grooves being arranged.

[0029] In some embodiments, the helical angle a of the helical flow guide groove 5 is set to a specific angle range, for example, it can be set to 15°-25°, which takes into account the axial thrust required for smooth forward movement of pollutants and the circumferential scraping coverage area. Too small an angle will cause the pollutants to stagnate in the groove, and too large an angle will easily cause the scraped particles to be thrown back to the sealing area; at the same time, the circumferential spacing q between the two adjacent helical flow guide grooves is controlled to a specific angle range, for example, it can be set to 30°-45°, so that the outer wall of the pipeline 8 is at least overlapped by two helical flow guide grooves on the same circumferential section, forming a "blind area-free" scraping zone, ensuring that the attachments within a 360° range can be continuously scraped and introduced into the annular sump.

[0030] In other embodiments, the depth of the groove of the helical flow guide groove 5 gradually increases along the insertion direction of the pipeline 8, forming a gradually deepening flow guide channel structure. This depth gradient design is based on the accumulation characteristics of pollutants during the insertion of the pipeline 8: as the pipeline 8 continues to penetrate, the amount of attachments scraped by the scraping edge increases, requiring more space. The deeper end region can effectively accommodate more pollutants, preventing blockage due to insufficient space; at the same time, the transition structure from shallow to deep facilitates the smooth flow of pollutants to the sump direction, avoiding accumulation in the middle of the flow guide groove. This gradually deepening design maximizes the pollutant accommodation capacity while ensuring structural strength.

[0031] The cross-sectional shape of the helical flow guide groove 5 is arc-shaped or U-shaped, and the scraping edge 51 is provided near the edge of the helical flow guide groove 5 close to the annular bearing plate 3. This position design enables the scraping edge to effectively scrape the dirt on the outer wall of the pipeline 8 into the helical flow guide groove 5 during the insertion of the pipeline 8, ensuring the cleanliness of the contact surface. The scraping edge 51 is formed by a silicone or polyurethane elastic material coating, which is used to scrape the attachments on the outer wall during the insertion of the pipeline 8, while avoiding scratching the outer wall of the pipeline 8.

[0032] In some embodiments, the scraping edge 51 adopts a wedge-shaped protruding structure, and the height gradually increases along the insertion direction of the pipeline 8. This wedge-shaped design realizes a progressive scraping function: the lower scraping edge in the front section can preliminarily clean loose attachments, the gradually increasing scraping edge in the middle section can handle more stubborn pollutants, and the highest scraping edge in the end section can complete the final fine cleaning. This hierarchical scraping mechanism ensures cleaning effectiveness while avoiding insertion difficulties caused by excessive scraping resistance. At the same time, the slope design of the wedge-shaped structure makes the scraping process more stable, reducing vibration and impact during the insertion of the pipeline 8. The thickness of the elastic material coating on the surface of the scraping edge also changes accordingly, and the coating design of thin in front and thick in back ensures the scraping force while providing increasingly perfect protection for the pipeline 8.

[0033] The junction position of the annular bearing plate 3 and the inner wall of the center assembly hole 2 is provided with an annular dirt collecting groove 6, which extends along the circumference of the inner wall of the center assembly hole 2, and the depth and width of the annular dirt collecting groove 6 are greater than the depth and width of the spiral flow guide groove 5. The end of the spiral flow guide groove 5 communicates with the annular dirt collecting groove 6, which is used for collecting and storing the scraped off contaminants.

[0034] The valve includes a valve body 7, a pipe 8 and the above-mentioned sealing connection safety gasket. The sealing connection safety gasket is installed at the pipe 8 connection port of the valve body 7 by a fastener. The end of the pipe 8 is inserted into the center assembly hole 2, and the end face is provided with a groove structure 81 matched with the limiting block 31. The end face of the pipe 8 abuts against the side surface of the annular bearing plate 3, forming axial limiting.

[0035] The working principle of the present application is as follows: when the heavy pipe 8 is assembled in the industrial field, impurities such as oil stains, dust or metal debris may be attached to the outer wall of the pipe 8. During the insertion process, the pipe 8 first contacts the tapered guide surface 4, which guides the pipe 8 to be centered. As the pipe 8 continues to be inserted, the outer wall contacts the scraping edge 51 located at the edge of the spiral flow guide groove 5 close to the annular bearing plate 3. As the pipe 8 enters, the scraping edge 51 scrapes off the attachments on the outer wall into the spiral flow guide groove 5, and the slight rotation or shaking during the adjustment process drives the scraping edge 51 to scrape off the attachments on the outer wall. The scraped off contaminants are guided along the spiral trajectory of the spiral flow guide groove 5 into the annular dirt collecting groove 6 for storage, avoiding the contaminants from entering the sealing area. The pipe 8 is finally inserted into position, and the end face groove structure 81 is embedded with the limiting block 31, preventing the pipe 8 from rotating, while the end face of the pipe 8 abuts against the annular bearing plate 3, forming stable axial limiting, enhancing the stability of the connection between the pipe 8 and the valve.

[0036] Through the above mechanism, the present application realizes self-cleaning during insertion of the pipe 8 and anti-rotation function after insertion, significantly reduces the installation resistance, and improves the coaxiality of the connection and the long-term sealing reliability.

[0037] The above-mentioned is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A sealing connection safety washer for use in sealing connection of a valve and a pipe, characterized in that, The cylindrical main sealing column is provided with a through central assembly hole in the center position thereof; An annular bearing plate is arranged at the axial middle position of the central assembly hole, and the plate surface of the annular bearing plate is perpendicular to the axial direction of the central assembly hole; Limiting protrusions are arranged on both sides of the annular bearing plate in the upward and downward pipeline insertion direction of the central assembly hole; Tapered guide surfaces are arranged on the upper and lower end port edges of the central assembly hole; Spiral flow guide grooves are arranged on the inner wall of the central assembly hole behind the tapered guide surfaces, and the spiral flow guide grooves extend in the pipeline insertion direction; Scraping edges are arranged on the edges of the spiral flow guide grooves, and the scraping edges are arranged on the edges of the spiral flow guide grooves close to the annular bearing plate, and the scraping edges are formed by covering with elastic materials; An annular sewage collecting groove is arranged at the junction position of the annular bearing plate and the inner wall of the central assembly hole, the annular sewage collecting groove extends along the circumference of the inner wall of the central assembly hole, and the terminal end of the spiral flow guide groove is communicated with the annular sewage collecting groove.

2. The sealed connection safety gasket of claim 1, wherein, The number of the spiral flow guide grooves is multiple, and the spiral flow guide grooves are uniformly distributed along the circumferential direction of the inner wall of the central assembly hole.

3. The sealed connection safety gasket of claim 2, wherein, The cross-sectional shape of the spiral flow guide groove is arc-shaped or U-shaped.

4. The sealed connection safety gasket of claim 1, wherein, The depth and width of the annular sewage collecting groove are greater than the depth and width of the spiral flow guide groove.

5. The sealed connection safety gasket of claim 1, wherein, The number of the limiting protrusions is multiple, and the limiting protrusions are uniformly distributed along the circumferential direction of the annular bearing plate.

6. The sealed connection safety gasket of claim 1, wherein, The tapered curved surface of the tapered guide surface is smooth, and the generatrix of the tapered guide surface forms an acute angle with the axis of the central assembly hole.

7. A valve, characterized by The sealing connection safety washer is installed at the pipeline connection port of the valve body, the end of the pipeline is inserted into the central assembly hole of the sealing connection safety washer, the end surface of the pipeline is provided with a groove structure matched with the limiting protrusions, and the end surface of the pipeline abuts against the side surface of the annular bearing plate.

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