Nickel metal stop valve

Abstract

The utility model discloses a nickel metal stop valve which comprises a valve body, a flow channel and a valve rod are arranged in the valve body, a valve clack for controlling opening and closing of the flow channel is arranged on the valve rod, a valve cover is arranged on the valve body, sealing cavities located at the two ends of the valve rod are formed in the valve body, sealing filler is filled in the sealing cavities, and a replacement opening communicated with the outside and the sealing cavities is formed in the valve body. A sealing cover is arranged on the replacement opening, a filling frame is arranged in the sealing cavity, a limiting cavity is formed in the filling frame, the sealing filler is arranged in the limiting cavity, the filling frame comprises supporting plates and a supporting rod, the supporting rod is connected with the two supporting plates, and the limiting cavity is formed between the two supporting plates; one end of the supporting rod is fixed to one supporting plate, the other end of the supporting rod is detachably connected to the other supporting plate, and the supporting rod penetrates through the sealing filler and limits the sealing filler. The stop valve has the following advantages and effects that the stop valve made of the nickel metal material can have better wear resistance and corrosion resistance, and the sealing filler can be replaced, so that the sealing performance of the valve is better ensured.

Description

Technical Field

[0001] The utility model relates to the field of stop valves, and more specifically, to a nickel metal stop valve. Background Art

[0002] The opening and closing parts of the stop valve (Globe Valve) are plug-shaped discs, with a flat or sea cone surface on the sealing surface, and the disc moves linearly along the center line of the valve seat. The movement of the valve stem also has a lifting and rotating rod type that can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Therefore, this type of shut-off stop valve is very suitable for cutting or regulating and throttling. Since the valve stem opening or closing stroke of this type of valve is relatively short and has a very reliable cutting function, and since the change of the valve seat opening is proportional to the stroke of the valve disc, it is very suitable for regulating the flow.

[0003] Most stop valves use packing inside to contact the outer wall of the valve stem to improve the sealing between the valve stem and the valve body. Existing valve packing is usually pressed from materials such as flexible graphite. Due to the working nature of the stop valve, the flexible graphite packing rubs against the valve stem during the rise and fall of the valve stem. Therefore, the packing is worn out and needs to be replaced frequently. At the same time, due to the nature of the sealing packing, it is difficult to remove it completely during disassembly to avoid the failure of the packing sealing performance affecting the sealing performance of the valve body. Therefore, a structure that facilitates the replacement of the packing at a later stage is needed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a nickel metal stop valve that can facilitate the replacement of packing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nickel metal stop valve, comprising a valve body, a flow channel and a valve stem are arranged in the valve body, a valve disc for controlling the opening and closing of the flow channel is arranged on the valve stem, and a valve cover is arranged on the valve body, characterized in that: a sealing cavity located at both ends of the valve stem is formed in the valve body, the sealing cavity is filled with sealing stuffing, a replacement port connecting the outside and the sealing cavity is opened on the valve body, a sealing cover is arranged on the replacement port, a filling frame is arranged in the sealing cavity, a limited position cavity is formed on the filling frame, the sealing stuffing is arranged in the limited position cavity, the filling frame comprises a support plate and a support rod, the support rod connects the two support plates, the limiting cavity is formed between the two support plates, one end of the support rod is fixed to one of the support plates and the other end is detachably connected to the other support plate, the support rod passes through and limits the sealing stuffing.

[0006] By adopting the above technical scheme, a filling rack is provided to limit the packing so that the valve sealing packing can be replaced more conveniently, and a support rod is provided on the filling rack to directly pass through the sealing packing; the sealing packing made of flexible material can be better and more flatly fixed on the packing rack to make the sealing effect in various places more uniform and better, and it is also convenient to completely remove all the packing during disassembly to avoid the packing sinking into the sealing cavity and being difficult to remove.

[0007] The utility model is further configured as follows: the valve stem includes a disassembly portion and a connecting portion, the connecting portion is connected to the valve disc, the disassembly portion is provided with a locking groove, the connecting portion is provided with a clamping portion that matches the locking groove, the disassembly portion is provided with a first connecting hole, the clamping portion is provided with a second connecting hole, when the clamping portion is located in the locking groove, the first connecting hole and the second connecting hole are communicated with each other, the disassembly portion is provided with a fixing rod, and the fixing rod passes through the first connecting hole and the second connecting hole to fix both the disassembly portion and the connecting portion.

[0008] By adopting the above technical solution, the valve stem is composed of a disassembly part and a connection part, so that the valve stem can be disassembled, which is more convenient for packing disassembly and replacement. At the same time, the fixing part can fix the two parts of the valve stem to ensure the use of the function of the valve stem itself. It is convenient and practical, and the sealing packing does not need to be cut and can be directly sleeved on the valve stem to ensure the sealing performance of the sealing packing itself without reducing its sealing performance.

[0009] The utility model is further configured as follows: a limiting rod located in the second connecting hole is arranged on the clamping part, the limiting rod is rotated on the clamping part, a driving block is protrudingly arranged on the fixing rod, the fixing rod includes a driving rod and a locking part, and the locking part is threadedly connected to the disassembly part.

[0010] By adopting the above technical solution, a driving block and a limiting rod are provided, which can directly push the limiting rod to rotate and engage when the driving rod is installed, thereby limiting rotation between the connecting part and the disassembly part. At the same time, the locking part is threadedly connected to the disassembly part to facilitate installation while limiting the driving rod to prevent disengagement.

[0011] The utility model is further configured as follows: a clamping end is provided at one end of the support rod, and a clamping inclined surface is formed on the clamping end.

[0012] By adopting the above technical solution, the sealing filler can be better penetrated.

[0013] The utility model is further configured as follows: a fixing groove is formed on the clamping end, a clamping groove is provided on one of the support plates, a clamping block is provided in the clamping groove for sliding, a limiting recess is provided at one end of the clamping block, and an extrusion spring connecting the clamping block is provided in the clamping groove.

[0014] By adopting the above technical solution, the clamping limiter can fix the support rod and the support plate at the same time, and the disassembly is more convenient and quick.

[0015] The utility model is further configured as follows: a first spring connected to the filling frame is arranged in the limiting cavity.

[0016] By adopting the above technical solution, it is convenient to take out the filling rack, which is practical and easy to use.

[0017] The utility model is further configured as follows: the valve body material is nickel metal.

[0018] By adopting the above technical solution, high polishing and corrosion resistance can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 2 This is an enlarged view of part A;

[0021] Figure 3 A three-dimensional diagram of a filling rack according to an embodiment of the utility model;

[0022] Figure 4 This is a three-dimensional diagram of a support plate according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0023] Reference Figures 1 to 4 The embodiments of the utility model are further described.

[0024] A nickel metal stop valve comprises a valve body 1, a flow channel and a valve stem 2 are arranged in the valve body 1, a valve disc 3 for controlling the opening and closing of the flow channel is arranged on the valve stem 2, and a valve cover is arranged on the valve body 1, wherein a sealing cavity 12 located at both ends of the valve stem 2 is formed in the valve body 1, the sealing cavity 12 is filled with a sealing packing 13, a replacement port 14 connecting the outside and the sealing cavity 12 is opened on the valve body 1, a sealing cover 4 is arranged on the replacement port 14, a filling frame 5 is arranged in the sealing cavity 12, a limiting cavity 51 is formed on the filling frame 5, the sealing packing 13 is arranged in the limiting cavity 51, the filling frame 5 comprises a support plate 52 and a support rod 53, the support rod 53 connects the two support plates 52, the limiting cavity 51 is formed between the two support plates 52, one end of the support rod 53 is fixed to one of the support plates 52 and the other end is detachably connected to the other support plate 52, the support rod 53 passes through and limits the sealing packing 13.

[0025] The valve stem 2 includes a disassembly portion 54 and a connecting portion 55, the connecting portion 55 is connected to the valve disc 3, a locking groove 56 is provided on the disassembly portion 54, a clamping portion 57 that matches the locking groove 56 is protruded on the connecting portion 55, a first connecting hole 61 is provided on the disassembly portion 54, and a second connecting hole 62 is provided on the clamping portion 57. When the clamping portion 57 is located in the locking groove 56, the first connecting hole 61 and the second connecting hole 62 are connected to each other, and a fixing rod 63 is provided on the disassembly portion 54, and the fixing rod 63 passes through the first connecting hole 61 and the second connecting hole 62 to fix both the disassembly portion 54 and the connecting portion 55.

[0026] The clamping portion 57 is provided with a limiting rod 64 located in the second connecting hole 62 , and the limiting rod 64 rotates on the clamping portion 57 . A driving block 65 is protrudingly provided on the fixing rod 63 . The fixing rod 63 includes a driving rod 7 and a locking portion 72 . The locking portion 72 is threadedly connected to the disassembly portion 54 .

[0027] When the locking groove 56 and the engaging part 57 are engaged with each other, the driving rod 7 is passed through the first connecting hole 61 and the second connecting hole 62, and the driving block 65 on the driving rod 7 drives the limiting rod 64 to rotate. There is a engaging groove connected to the locking groove 56 on the disassembly part 54. The limiting rod 64 rotates and is engaged in the engaging groove. The connecting part 55 and the disassembly part 54 are placed and rotated, and the driving rod 7 limits the connection and separation of the disassembly part 54. The locking part 72 is threadedly connected to the disassembly part 54 to limit the driving rod 7.

[0028] One end of the support rod 53 is provided with a clamping end, and the clamping end is formed with a clamping inclined surface 8.

[0029] A fixing groove 531 is also recessed on the clamping end. A clamping groove is set on one of the support plates 52. A clamping block 9 is arranged in the clamping groove for sliding. A limiting recess 91 is arranged at one end of the clamping block 9. An extrusion spring connecting the clamping block 9 is arranged in the clamping groove.

[0030] A first spring 92 connected to the filling frame 5 is arranged in the limiting cavity 51 .

[0031] The valve body 1 is made of nickel metal.

[0032] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A nickel metal stop valve, comprising a valve body (1), wherein a flow channel and a valve stem (2) are arranged in the valve body (1), wherein a valve flap (3) for controlling the opening and closing of the flow channel is arranged on the valve stem (2), and a valve cover is arranged on the valve body (1), wherein: The valve body (1) is formed with sealing cavities (12) located at both ends of the valve stem (2), and the sealing cavity (12) is filled with sealing filler (13). The valve body (1) is provided with a replacement port (14) communicating with the outside and the sealing cavity (12), and a sealing cover (4) is arranged on the replacement port (14). A filling frame (5) is arranged in the sealing cavity (12), and a limited position cavity (51) is formed on the filling frame (5), and the sealing filler (13) is arranged in the limited position cavity (51). The filling frame (5) comprises a support plate (52) and a support rod (53), and the support rod (53) connects the two support plates (52). The limited position cavity (51) is formed between the two support plates (52), and one end of the support rod (53) is fixed to one of the support plates (52) and the other end is detachably connected to the other support plate (52). The support rod (53) passes through and limits the sealing filler (13).

2. The nickel metal stop valve according to claim 1 is characterized in that: The valve stem (2) comprises a disassembly portion (54) and a connection portion (55), wherein the connection portion (55) is connected to the valve flap (3), the disassembly portion (54) is provided with a locking groove (56), the connection portion (55) is provided with a clamping portion (57) which matches the locking groove (56), the disassembly portion (54) is provided with a first connection hole (61), the clamping portion (57) is provided with a second connection hole (62), when the clamping portion (57) is located in the locking groove (56), the first connection hole (61) and the second connection hole (62) are connected to each other, and the disassembly portion (54) is provided with a fixing rod (63), the fixing rod (63) passes through the first connection hole (61) and the second connection hole (62) to fix both the disassembly portion (54) and the connection portion (55).

3. The nickel metal stop valve according to claim 2 is characterized in that: The clamping portion (57) is provided with a limiting rod (64) located in the second connecting hole (62), and the limiting rod (64) is rotated on the clamping portion (57). A driving block (65) is protrudingly provided on the fixing rod (63), and the fixing rod (63) includes a driving rod (7) and a locking portion (72), and the locking portion (72) is threadedly connected to the disassembly portion (54).

4. The nickel metal stop valve according to claim 1 is characterized in that: One end of the support rod (53) is provided with a clamping end, and the clamping end is formed with a clamping inclined surface (8).

5. The nickel metal stop valve according to claim 4 is characterized in that: The clamping end is also recessed to form a fixing groove (531), one of the support plates (52) is provided with a clamping groove, a clamping block (9) is slidably disposed in the clamping groove, a limiting recess (91) is disposed at one end of the clamping block (9), and a compression spring connected to the clamping block (9) is disposed in the clamping groove.

6. The nickel metal stop valve according to claim 5, characterized in that: A first spring (92) connected to the filling frame (5) is arranged in the limiting cavity (51).

7. The nickel metal stop valve according to claim 1, characterized in that: The valve body (1) is made of nickel metal.

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