Corrugated pipe valve

Abstract

The utility model discloses a corrugated pipe valve, which relates to the technical field of valves and comprises a valve body, a valve cover, a valve rod, a corrugated pipe, an upper connecting disc, a lower connecting disc and a connecting mechanism, the valve cover is arranged at the upper end of the valve body, the lower end of the valve rod penetrates through the valve cover and enters the valve body, and the upper connecting disc, the lower connecting disc and the corrugated pipe are sleeved at the lower end of the valve rod. The lower end of the upper connecting disc and the upper end of the upper connecting disc are each provided with a connecting mechanism, and the two ends of the corrugated pipe are detachably connected with the two connecting mechanisms. And the connecting mechanism comprises an outer fixing ring, an inner fixing ring, a connecting ring and a screw rod. The connecting mechanisms are arranged on the upper connecting disc and the lower connecting disc respectively, the upper connecting disc and the lower connecting disc are connected with the two ends of the corrugated pipe through the connecting mechanisms, the sealing performance of the corrugated pipe can be guaranteed, the corrugated pipe can be conveniently installed or detached, when the corrugated pipe is replaced, the corrugated pipe can be directly detached and replaced independently, and the maintenance cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a bellows valve. Background Art

[0002] For highly hazardous media such as toxic, flammable and explosive media, heat transfer oil, highly permeable media, polluting media, radioactive media, etc., the sealing performance requirements of the valve are very strict. Bellows valves are usually selected to meet the requirements of such working conditions, protect the environment and ensure personal safety. Valves with bellows structures mainly include gate valves and stop valves. Bellows valves are widely used in industries such as petroleum, chemical, pharmaceutical and electric power.

[0003] The bellows valve in the prior art CN215635085U includes a valve body, a valve cover, a bellows, a valve stem passing through the bellows, an upper connecting plate and a lower connecting plate respectively located at both ends of the bellows, the upper connecting plate being clamped between the valve body and the valve cover, the lower connecting plate being positioned on the valve stem, an upper welding groove being provided on the end surface of the upper connecting plate facing the valve cover, the upper welding groove being arranged close to the center of the upper connecting plate, one end of the bellows passing through the upper connecting plate and a portion of the end of the bellows higher than the upper end surface of the upper connecting plate being welded in the upper welding groove, and the corrugated portion of the bellows being limited between the upper connecting plate and the lower connecting plate; a lower welding groove being provided on the side wall of the lower connecting plate, the maximum diameter of the lower connecting plate being less than or equal to the maximum diameter of the bellows, and the end portion of the bellows fitting the lower connecting plate being partially welded in the lower welding groove by hot melt.

[0004] In the prior art, the bellows is connected to the upper connecting plate and the lower connecting plate by welding. However, this connection method makes it impossible to disassemble the bellows and the upper connecting plate and the lower connecting plate. When the bellows needs to be replaced, the upper connecting plate and the lower connecting plate need to be replaced at the same time, resulting in high maintenance costs. Utility Model Content

[0005] The purpose of the utility model is to provide a bellows valve for solving the above technical problems.

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

[0007] A bellows valve comprises a valve body, a valve cover, a valve stem, a bellows, an upper connecting plate and a lower connecting plate, wherein the upper end of the valve body is provided with a valve cover, the lower end of the valve stem passes through the valve cover and enters into the valve body, the lower end of the valve stem is sleeved with an upper connecting plate, a lower connecting plate and a bellows, and further comprises a connecting mechanism, wherein the lower end of the upper connecting plate and the upper end of the upper connecting plate are respectively provided with connecting mechanisms, and the two ends of the bellows are detachably connected to the two connecting mechanisms;

[0008] The connection mechanism includes:

[0009] An outer fixing ring is provided at the lower end of the upper connecting plate and the upper end of the lower connecting plate;

[0010] An inner fixing ring is provided on the inner side of the fixing ring, and a gap is provided between the outer fixing ring and the inner fixing ring;

[0011] A connecting ring, which is detachably disposed between the inner fixing ring and the outer fixing ring, and is connected to the bellows;

[0012] A screw rod passes through the outer fixing ring and abuts against the connecting ring.

[0013] Furthermore, as a preferred embodiment, it also includes a rubber ring, and a rubber ring is provided at one end of the connecting ring away from the bellows.

[0014] Furthermore, as a preferred embodiment, an outer edge of one end of the connecting ring close to the bellows is provided with an inclined surface.

[0015] Further, as a preferred embodiment, one end of the screw rod obliquely passes through the outer fixing ring, and one end of the screw rod abuts against the inclined surface.

[0016] Furthermore, as a preferred embodiment, a threaded hole is provided on the outer fixing ring, the threaded hole is inclined, the axis of the threaded hole is perpendicular to the inclined surface, and the screw is provided in the threaded hole.

[0017] Furthermore, as a preferred embodiment, it also includes a handle, and the upper end of the valve stem is provided with a handle.

[0018] Furthermore, as a preferred embodiment, a gland is sleeved on the outer edge of the valve stem, and an installation groove for installing a sealing packing is opened on the upper end of the valve cover, and the gland is used to compress the sealing packing.

[0019] Furthermore, as a preferred embodiment, it also includes a valve core, and the lower end of the valve stem is provided with a valve core.

[0020] The above technical solution has the following advantages or beneficial effects:

[0021] In the utility model, connecting mechanisms are respectively provided on the upper connecting plate and the lower connecting plate, and are connected to the two ends of the bellows through the connecting mechanisms. This can not only ensure the sealing performance of the bellows, but also facilitate the installation or disassembly of the bellows. When replacing the bellows, the bellows can be directly removed and replaced separately, which can save maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the bellows valve in the utility model;

[0023] Figure 2 It is a structural schematic diagram of the connecting mechanism in the utility model;

[0024] Figure 3 yes Figure 2 Sectional view along AA direction.

[0025] In the figure: 1. connecting mechanism; 101. outer fixing ring; 102. inner fixing ring; 103. connecting ring; 104. screw; 105. rubber ring; 106. inclined surface; 107. threaded hole; 2. valve body; 3. valve cover; 4. valve stem; 5. bellows; 6. upper connecting plate; 7. lower connecting plate; 8. handle; 9. pressure cover; 10. sealing packing; 11. valve core. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Figure 1 It is a structural schematic diagram of the bellows valve in the utility model; Figure 2 It is a structural schematic diagram of the connecting mechanism in the utility model; Figure 3 yes Figure 2 For the cross-sectional view in the AA direction, see Figures 1 to 3As shown, a preferred embodiment is shown, which shows a bellows valve, including a valve body 2, a valve cover 3, a valve stem 4, a bellows 5, an upper connecting plate 6 and a lower connecting plate 7. The upper end of the valve body 2 is provided with a valve cover 3, and the lower end of the valve stem 4 passes through the valve cover 3 and enters the valve body 2. The lower end of the valve stem 4 is sleeved with an upper connecting plate 6, a lower connecting plate 7 and a bellows 5. The lower connecting plate 7 is positioned on the valve stem 4, and also includes a connecting mechanism 1. The lower end of the upper connecting plate 6 and the upper end of the upper connecting plate 6 are respectively provided with connecting mechanisms 1, and the two ends of the bellows 5 are detachably connected to the two connecting mechanisms 1; see Figure 1 As shown, the main improvement of the bellows 5 valve in this embodiment lies in the connection method between the bellows 5 and the upper connecting plate 6 and the lower connecting plate 7, which mainly involves the specific structure of the connecting mechanism 1. As for the rest of the structure and working principle of the bellows 5 valve, they have been recorded in the prior art CN215635085U.

[0030] In the present application, a connecting mechanism 1 is set at the lower end of the upper connecting plate 6 and the upper end of the lower connecting plate 7, so that the two ends of the bellows 5 are detachably connected to the two connecting mechanisms 1, which can not only ensure the sealing performance of the bellows 5, but also facilitate the installation and disassembly of the bellows 5. Through the setting of the connecting mechanism 1, the traditional welding connection form is avoided, so that the bellows 5 can be disassembled and replaced separately, which can reduce the maintenance cost.

[0031] See also Figure 1 As shown, the upper connecting plate 6 is pressed down by the valve cover 3 and restricted at the upper end opening of the valve body 2, and sealing rings are provided on the upper surface outer edge and the lower surface outer edge of the upper connecting plate 6 to prevent fluid leakage.

[0032] The connecting mechanism 1 in this embodiment includes:

[0033] An outer fixing ring 101 is provided at the lower end of the upper connecting plate 6 and the upper end of the lower connecting plate 7;

[0034] An inner fixing ring 102 is provided on the inner side of the fixing ring, and a gap is provided between the outer fixing ring 101 and the inner fixing ring 102;

[0035] A connecting ring 103, which is detachably disposed between the inner fixing ring 102 and the outer fixing ring 101, and is connected to the bellows 5;

[0036] The screw rod 104 passes through the outer fixing ring 101 and abuts against the connecting ring 103. Figure 3As shown, the screw rod 104 is threadedly connected to the outer fixing ring 101, and a cross groove is provided on the other end surface of the screw rod 104 to facilitate the cooperation with an external screwdriver tool. The outer fixing ring 101 and the inner fixing ring 102 are respectively welded to the upper connecting plate 6 or the lower connecting plate 7, and a gap is left between the outer fixing ring 101 and the inner fixing ring 102 for installing the connecting ring 103 and the bellows 5, wherein the bellows 5 and the connecting ring 103 are welded to ensure the sealing after the connection between the two.

[0037] Further, as a preferred embodiment, a rubber ring 105 is further included, and a rubber ring 105 is provided at one end of the connecting ring 103 away from the bellows 5. Figure 3 As shown, the rubber ring 105 can be used for sealing between the connecting ring 103 and the outer fixing ring 101 and the inner fixing ring 102. When the screw 104 squeezes the connecting ring 103, the connecting ring 103 will squeeze the rubber ring 105, causing the rubber ring 105 to deform, thereby achieving a sealing effect and ensuring the sealing of the bellows 5.

[0038] Further, as a preferred embodiment, an outer edge of one end of the connecting ring 103 close to the bellows 5 is provided with an inclined surface 106. Figure 2 and Figure 3 As shown, one end of the screw 104 obliquely passes through the outer fixing ring 101, and one end of the screw 104 abuts against the inclined surface 106. When the screw 104 is tightened, the screw 104 can squeeze the inclined surface 106 on the connecting ring 103, and the two side walls of the connecting ring 103 abut against the outer fixing ring 101 and the inner fixing ring 102, and the screw 104 squeezes the inclined surface 106 on the connecting ring 103, which can make the connecting ring 103 more stable and will not loosen, thereby improving the sealing effect.

[0039] Further, as a preferred embodiment, a threaded hole 107 is provided on the outer fixing ring 101, the threaded hole 107 is inclined, the axis of the threaded hole 107 is perpendicular to the inclined surface 106, and the screw 104 is disposed in the threaded hole 107. Figure 3 As shown, the threaded hole 107 is tilted, and the screw 104 is disposed in the threaded hole 107 . By rotating the screw 104 , the screw 104 moves in the threaded hole 107 along the axial direction of the threaded hole 107 , so that one end of the screw 104 can be squeezed on the inclined surface 106 of the connecting ring 103 .

[0040] Further, as a preferred embodiment, a handle 8 is further included, and a handle 8 is provided at the upper end of the valve stem 4. A gland 9 is provided on the outer edge of the valve stem 4, and a mounting groove for installing a sealing packing 10 is provided at the upper end of the valve cover 3, and the gland 9 is used to compress the sealing packing 10. A valve core 11 is provided at the lower end of the valve stem 4. The valve stem 4 can be driven to move up and down by the handle 8, and the up and down movement of the valve stem 4 can drive the valve core 11 to move up and down, thereby opening or closing the fluid channel inside the valve body 2. The sealing packing 10 and the gland 9 cooperate to achieve the sealing between the valve cover 3 and the valve stem 4.

[0041] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A bellows valve, comprising a valve body, a valve cover, a valve stem, a bellows, an upper connecting plate and a lower connecting plate, wherein the valve cover is arranged at the upper end of the valve body, the lower end of the valve stem passes through the valve cover and enters into the valve body, and the upper connecting plate, the lower connecting plate and the bellows are sleeved at the lower end of the valve stem, characterized in that: It also includes a connecting mechanism, the lower end of the upper connecting plate and the upper end of the upper connecting plate are respectively provided with the connecting mechanism, and the two ends of the corrugated tube are detachably connected to the two connecting mechanisms; The connecting mechanism comprises: An outer fixing ring, wherein the lower end of the upper connecting plate and the upper end of the lower connecting plate are respectively provided with an outer fixing ring; An inner fixing ring, wherein the inner fixing ring is provided on the inner side of the fixing ring, and a gap is provided between the outer fixing ring and the inner fixing ring; A connecting ring, which is detachably disposed between the inner fixing ring and the outer fixing ring, and is connected to the bellows; A screw rod passes through the outer fixing ring and abuts against the connecting ring.

2. The bellows valve according to claim 1, characterized in that: It also includes a rubber ring, and the rubber ring is provided at one end of the connecting ring away from the bellows.

3. The bellows valve according to claim 1, characterized in that: An outer edge of one end of the connecting ring close to the corrugated pipe is provided with an inclined surface.

4. The bellows valve according to claim 3, characterized in that: One end of the screw rod obliquely passes through the outer fixing ring, and one end of the screw rod abuts against the inclined surface.

5. The bellows valve according to claim 4, characterized in that: The outer fixing ring is provided with a threaded hole, the threaded hole is arranged obliquely, the axis of the threaded hole is perpendicular to the inclined surface, and the screw rod is arranged in the threaded hole.

6. The bellows valve according to claim 1, characterized in that: It also includes a handle, and the handle is arranged on the upper end of the valve stem.

7. The bellows valve according to claim 1, characterized in that: The outer edge of the valve stem is sleeved with a pressure cover, and the upper end of the valve cover is provided with an installation groove for installing a sealing packing, and the pressure cover is used to compress the sealing packing.

8. The bellows valve according to claim 1, characterized in that: It also includes a valve core, and the lower end of the valve stem is provided with the valve core.

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