Welding-free sealing flange of valve

Abstract

The utility model relates to the technical field of valve flanges, and provides a valve non-welding sealing flange which comprises a flange body, a valve connector and a connecting assembly. A clamping rod is driven to slide along a through hole by pulling a handle rod, at the moment, a spring is compressed under the action of a blocking ring, the handle rod can pull one end of the clamping rod to be separated from a clamping groove and enter a first circular groove, a protruding block in a flange body is aligned with a groove till the protruding block and the groove are attached, and at the moment, a sealing ring is squeezed between the flange body and a circular ring as well; then the handle rod can be loosened, the compression force borne by the spring disappears, the spring can rebound to recover to the initial state, namely, the spring can push the blocking ring to slide along the penetrating hole until one end of the clamping rod is pushed to enter the clamping groove, and the spring can recover to the initial state at the moment; and under the action of the clamping rods, the clamping grooves can be prevented from deviating from the first circular grooves, namely, the protruding blocks are prevented from being separated from the grooves, and the problem that the flange body and the valve connector are inconvenient to fixedly connect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve flanges, and in particular to a non-welded sealing flange for a valve. Background Art

[0002] Valves are pipe fittings used to open and close pipelines, control flow direction, and regulate and control the parameters of the conveyed medium (temperature, pressure, and flow). Based on their function, they can be categorized as shutoff valves, check valves, and regulating valves. Valves are control components in fluid conveying systems, performing functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, flow diversion, and overflow and pressure relief. Valves used in fluid control systems come in a wide variety of types and specifications, ranging from simple shutoff valves to highly complex valves used in automatic control systems. A flange, also known as a flanged disc or flange, is a component that connects shafts and is used to connect pipe ends. Flanges are also used on equipment inlets and outlets, connecting two pieces of equipment, such as reducer flanges. A flange connection, or flange joint, is a removable connection composed of a flange, gasket, and bolts, forming a combined sealing structure. A pipe flange is a flange used for piping in piping systems. On equipment, it refers to the inlet and outlet flanges of the equipment. The flanges have eyelets, which are bolted together. Gaskets are used to seal the flanges. Flanges are divided into threaded connection (threaded connection) flanges, welding flanges and clamping flanges.

[0003] Patent specification CN202852252U discloses a non-welded sealing flange for a valve, comprising a flange with a through-hole in the center, a stepped groove around the through-hole, a flat washer at the bottom of the stepped groove, a pressure retaining ring within the stepped groove, a spring hole in the sidewall of the stepped groove, a spring within the spring hole, and bolt holes around the edge of the flange. This device provides a secure connection and good sealing performance.

[0004] However, in the implementation of relevant technologies, it was found that the above technical solution has the following problems: during the use of the above device, when the valve has no welded sealing flange and is connected to the valve interface, its through hole is fixedly connected to the flange and the valve interface by the mutual cooperation of external bolts and nuts. When the bolts and nuts are used for a long time, tightening fatigue is likely to occur, resulting in looseness, which causes leakage at the flange and valve interface. Therefore, further improvement is needed. Utility Model Content

[0005] The utility model provides a valve non-welding sealing flange, which solves the problem in the related art that it is inconvenient to perform fixed connection between the flange body and the valve interface.

[0006] The technical solution of the utility model is as follows:

[0007] A valve non-welded sealing flange includes a flange body, a valve interface is provided at the lower end of the flange body, and a connecting component is provided inside the flange body and the valve interface. The connecting component includes a first connecting component arranged at one end of the valve interface for limiting the flange body to prevent the hole positions between the flange body and the valve interface from being misaligned. A second connecting component is provided at one end of the flange body for sealing the flange body and the valve interface to prevent leakage of the medium. A clamping component for fixedly engaging the flange body and the valve interface is provided inside the first connecting component, that is, for fixedly engaging the first connecting component and the second connecting component.

[0008] Preferably, the first connecting component includes a circular ring fixedly connected to one end of the valve interface, a first through groove is formed through one end of the circular ring, a groove is formed on the inner wall of the circular ring, and a first circular groove is formed on the inner wall of the groove.

[0009] Preferably, a second circular groove is provided on the outer surface of the circular ring, and a through-hole is provided through the inner wall of the second circular groove, and the through-hole is communicated with the first circular groove.

[0010] Preferably, the second connecting component includes a second through groove extending through one end of the flange body, an extension block is fixedly connected to one end of the flange body, a sealing ring and a protrusion are fixedly connected to the outer surface of the extension block, and a slot is provided on one side of the protrusion.

[0011] Preferably, the extension block is slidably connected to the inner wall of the circular ring, the protrusion is slidably connected to the groove, and the clamping groove is communicated with the first circular groove.

[0012] Preferably, the engaging component includes a clamping rod slidably connected to the inside of the through hole, a blocking ring is fixedly connected to the outer surface of the clamping rod, and one end of the clamping rod is fixedly connected to a handle rod.

[0013] Preferably, the handle rod passes through the interior of the second circular groove, the handle rod is located outside the circular ring, the blocking ring slides against the inner wall of the perforation, and the clamping rod is slidably connected to the clamping groove.

[0014] Preferably, one end of the blocking ring is fixedly connected to a spring, and one end of the spring is fixedly connected to the side wall of the perforated second circular groove.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] The utility model drives the card rod to slide along the through-hole by pulling the handle rod. At this time, the spring is compressed under the action of the blocking ring, so that the handle rod can pull one end of the card rod out of the card slot and into the first circular groove. Then the protrusion in the flange body can be aligned with the groove until the two are fully fitted. At this time, the sealing ring will also be squeezed between the flange body and the circular ring. Then the handle rod can be released. At this time, the compression force on the spring disappears, causing the spring to rebound and return to its initial state, that is, the spring will push the blocking ring to slide along the through-hole until it pushes one end of the card rod into the inside of the card slot. At this time, the spring will return to its initial state. Under the action of the card rod, the card slot can be prevented from deviating from the first circular groove, that is, the protrusion can be prevented from leaving the groove, thereby solving the problem of inconvenience in fixing the flange body and the valve interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the first connecting component of the present utility model;

[0020] Figure 3 This is a schematic structural diagram of the second connecting component of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the engaging component of the present utility model;

[0022] Figure 5 For this utility model Figure 2 A in the enlarged view.

[0023] In the figure: 1. Flange body; 2. Valve interface; 3. Connecting assembly; 31. First connecting component; 311. Circular ring; 3111. First through groove; 3112. Groove; 31121. First circular groove; 3113. Second circular groove; 31131. Through hole; 32. Second connecting component; 321. Second through groove; 322. Extension block; 3221. Sealing ring; 3222. Protrusion; 32221. Slot; 33. Engaging component; 331. Clamping rod; 3311. Blocking ring; 33111. Spring; 3312. Handle rod. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1 As shown, this embodiment proposes a valve non-welded sealing flange, including a flange body 1, a valve interface 2 is provided at the lower end of the flange body 1, and a connecting component 3 is provided inside the flange body 1 and the valve interface 2.

[0026] like Figure 2 As shown, the connecting assembly 3 includes a first connecting component 31 arranged at one end of the valve interface 2 for limiting the flange body 1 to prevent the holes between the flange body 1 and the valve interface 2 from being misaligned. The first connecting component 31 includes a circular ring 311 fixedly connected to one end of the valve interface 2, and a first through-groove 3111 is provided at one end of the circular ring 311. A groove 3112 is provided on the inner wall of the circular ring 311, and a first circular groove 31121 is provided on the inner wall of the groove 3112. The first through-groove 3111 is a hole position reserved on the valve interface 2 to facilitate external bolts to fix the valve interface 2 and the flange body 1. The groove 3112 is used to limit the flange body 1 to prevent the flange body 1 from rotating at the upper end of the circular ring 311, thereby affecting the alignment of the holes of the two.

[0027] like Figure 3 As shown, one end of the flange body 1 is provided with a second connecting component 32 for sealing the flange body 1 and the valve interface 2 to prevent leakage of the medium. The second connecting component 32 includes a second through groove 321 that runs through one end of the flange body 1. An extension block 322 is fixedly connected to one end of the flange body 1. A sealing ring 3221 and a protrusion 3222 are fixedly connected to the outer surface of the extension block 322. A card groove 32221 is provided on one side of the protrusion 3222. The extension block 322 is slidably connected to the inner wall of the ring 311, and the protrusion 3222 is slidably connected to the groove 3112. The groove 32221 is connected to the first circular groove 31121. The second through groove 321 is a hole reserved on the flange body 1 to facilitate external bolts to fix the valve interface 2 and the flange body 1. The sealing ring 3221 is used to fill the gap between the contact surface of the flange body 1 and the circular ring 311 to prevent medium leakage. The sealing ring 3221 will be deformed under the extrusion of the flange body 1 on the circular ring 311 to form a tight sealing surface, so that the sealing ring 3221 can better fit with the small uneven surface of the flange body 1 on the circular ring 311, thereby reducing the possibility of leakage.

[0028] like Figure 4 As shown, the interior of the first connecting component 31 is provided with a clamping component 33 for fixedly engaging and connecting the flange body 1 and the valve interface 2, that is, for fixedly engaging and connecting the first connecting component 31 and the second connecting component 32. The clamping component 33 includes a clamping rod 331 slidably connected to the interior of the through-hole 31131, a blocking ring 3311 is fixedly connected to the outer surface of the clamping rod 331, and a handle rod 3312 is fixedly connected to one end of the clamping rod 331. The handle rod 3312 passes through the interior of the second circular groove 3113. The handle rod 33 12 is located on the outside of the circular ring 311, the blocking ring 3311 slides against the inner wall of the through hole 31131, the clamping rod 331 is slidably connected to the clamping groove 32221, one end of the blocking ring 3311 is fixedly connected to the spring 33111, one end of the spring 33111 is fixedly connected to the side wall of the second circular groove 3113 of the through hole 31131, and the spring 33111 is used to push the blocking ring 3311 to slide along the through hole 31131, that is, the blocking ring 3311 drives the clamping rod 331 to slide along the through hole 31131 into the interior of the clamping groove 32221.

[0029] like Figure 5 As shown, a second circular groove 3113 is provided on the outer surface of the circular ring 311, and a through-hole 31131 is provided on the inner wall of the second circular groove 3113. The through-hole 31131 is communicated with the first circular groove 31121. The existence of the second circular groove 3113 is used to provide a support point for one end of the spring 33111, and the existence of the first circular groove 31121 is used to prevent the blocking ring 3311 from escaping from the inside of the through-hole 31131.

[0030] When the flange body 1 and the valve interface 2 need to be fixedly connected, the staff first needs to pull the handle rod 3312 to drive the clamping rod 331 to slide along the through hole 31131. At this time, the spring 33111 is compressed under the action of the blocking ring 3311, so that the handle rod 3312 can pull one end of the clamping rod 331 out of the clamping groove 32221 and into the first circular groove 31121. Then, the protrusion 3222 in the flange body 1 can be aligned with the groove 3112 until the two are fully fitted together. At this time, the sealing ring 3221 is also affected by the flange body 1 and the circular ring 311. When the cam 3311 is in the closed position, the spring 33111 is in the closed position, and the spring 33111 is in the closed position, so the cam 33111 is pressed downwards and the handle 3312 is released. When the cam 33111 is in the closed position, the handle 3312 is released, and the compression force on the spring 33111 disappears, causing the spring 33111 to rebound and return to its original state, that is, the spring 33111 pushes the blocking ring 3311 to slide along the through-hole 31131 until one end of the clamping rod 331 enters the inside of the clamping groove 32221, and the spring 33111 is restored to its original state. Under the action of the clamping rod 331, the clamping groove 32221 and the first circular groove 31121 are prevented from deviating, that is, the protrusion 3222 is prevented from disengaging from the groove 3112, thereby achieving a fixed connection between the flange body 1 and the valve interface 2;

[0031] Moreover, the first through groove 3111 and the second through groove 321 can further enhance the clamping force between the flange body 1 and the circular ring 311 through the external bolts. The clamping force can enhance the effective deformation of the sealing ring 3221 between the flange body 1 and the circular ring 311 to form a tight sealing surface, so that the sealing ring 3221 can better fit with the flange body 1 on the slightly uneven surface of the circular ring 311, thereby reducing the possibility of leakage.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve non-welded sealing flange, comprising a flange body (1), wherein a valve interface (2) is provided at the lower end of the flange body (1), characterized in that: A connecting assembly (3) is provided inside the flange body (1) and the valve interface (2), and the connecting assembly (3) includes a first connecting component (31) provided at one end of the valve interface (2) for limiting the flange body (1) to prevent the holes between the flange body (1) and the valve interface (2) from being misaligned. A second connecting component (32) is provided at one end of the flange body (1) for sealing the flange body (1) and the valve interface (2) to prevent leakage of the medium. A locking component (33) is provided inside the first connecting component (31) for fixedly engaging and connecting the flange body (1) and the valve interface (2), that is, for fixedly engaging and connecting the first connecting component (31) and the second connecting component (32).

2. A valve non-welded sealing flange according to claim 1, characterized in that: The first connecting component (31) comprises a circular ring (311) fixedly connected to one end of the valve interface (2), one end of the circular ring (311) being provided with a first through groove (3111), an inner wall of the circular ring (311) being provided with a groove (3112), and an inner wall of the groove (3112) being provided with a first circular groove (31121).

3. The valve non-welded sealing flange according to claim 2, characterized in that: A second circular groove (3113) is provided on the outer surface of the circular ring (311), and a through-hole (31131) is provided through the inner wall of the second circular groove (3113), and the through-hole (31131) is connected to the first circular groove (31121).

4. The valve non-welded sealing flange according to claim 1, characterized in that: The second connecting component (32) comprises a second through-groove (321) extending through one end of the flange body (1); an extension block (322) is fixedly connected to one end of the flange body (1); a sealing ring (3221) and a protrusion (3222) are fixedly connected to the outer surface of the extension block (322); and a clamping groove (32221) is provided on one side of the protrusion (3222).

5. The valve non-welded sealing flange according to claim 4, characterized in that: The extension block (322) is slidably connected to the inner wall of the circular ring (311), the protrusion (3222) is slidably connected to the groove (3112), and the clamping groove (32221) is connected to the first circular groove (31121).

6. The valve non-welded sealing flange according to claim 1, characterized in that: The engaging component (33) comprises a clamping rod (331) slidably connected to the inside of the through hole (31131), a blocking ring (3311) is fixedly connected to the outer surface of the clamping rod (331), and one end of the clamping rod (331) is fixedly connected to a handle rod (3312).

7. The valve non-welded sealing flange according to claim 6, characterized in that: The handle rod (3312) passes through the interior of the second circular groove (3113), and the handle rod (3312) is located outside the circular ring (311). The blocking ring (3311) slides against the inner wall of the through hole (31131), and the clamping rod (331) is slidably connected to the clamping groove (32221).

8. The valve non-welded sealing flange according to claim 6, characterized in that: One end of the blocking ring (3311) is fixedly connected to a spring (33111), and one end of the spring (33111) is fixedly connected to the side wall of the second circular groove (3113) of the through hole (31131).

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