Automatic pressing device for packing seal of valve rod of stop valve

Abstract

The utility model provides a stop valve stem packing seal automatic hold-down device, including: valve body, protection device and extrusion device, protection device includes: protection cover, first seal cartridge, seal ring and seal ring, the protection cover is provided in the valve body, first seal cartridge is connected to the surface of protection cover in sliding mode, and the first seal cartridge is connected to the surface of the seal ring in sliding mode. The sealing ring is fixedly connected to one end of the first sealing sleeve, the sealing ring is fixedly connected to one end of the first sealing sleeve, the extrusion device comprises an adjusting groove, an extrusion spring and an adjusting sleeve, the adjusting groove is formed in the protective sleeve, and the extrusion spring is arranged in the adjusting groove. According to the automatic pressing device for the packing seal of the valve rod of the stop valve, the protective sleeve is matched with the first sealing sleeve, the sealing ring and the sealing ring to seal the extrusion spring, so that the situation that the spring is eroded by leaked water or other conveyed objects when the packing is abraded and leaks is prevented, and the service life of the extrusion spring is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to an automatic tightening device for gate valve stem packing seal. Background Technology

[0002] A gate valve, also known as a stop valve, is a type of forced-seal valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force a leak-proof seal. The opening and closing element of a gate valve is a plug-shaped valve disc, with a flat or conical sealing surface. The valve disc moves linearly along the center line of the valve seat. The valve stem can also move in a rising and rotating manner. It can be used to control the flow of various types of fluids, such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.

[0003] The packing of a gate valve is a component used to seal the gap between the valve stem and the valve cover to prevent media leakage. The automatic sealing and tightening device is used to tighten the packing to ensure the sealing performance between the valve stem and the packing.

[0004] Current automatic sealing and tightening devices typically consist of a spring, a spring seat, and a packing gland. The spring is installed above the packing gland and fixed by the spring seat. The spring's elastic force acts on the packing gland, applying downward pressure to the packing. However, as the packing wears down, leaks occur. The leaked water or other conveyed materials corrode the spring, affecting its performance and reducing its service life.

[0005] Therefore, it is necessary to provide an automatic tightening device for the valve stem packing seal of a gate valve to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides an automatic tightening device for the valve stem packing seal of a gate valve, which solves the problem that leakage can corrode the spring and affect its performance during use.

[0007] To solve the above-mentioned technical problems, this utility model provides an automatic pressing device for valve stem packing seal of a gate valve, comprising: a valve body, a protective device and a pressing device;

[0008] The protective device includes a protective sleeve, a first sealing sleeve, a sealing ring, and a sealing ring. The protective sleeve is disposed inside the valve body. The first sealing sleeve is slidably connected to the surface of the protective sleeve. The sealing ring is fixedly connected to one end of the first sealing sleeve, and the sealing ring is fixedly connected to one end of the first sealing sleeve.

[0009] The extrusion device includes an adjustment groove, an extrusion spring, and an adjustment sleeve. The adjustment groove is located inside the protective sleeve, the extrusion spring is located inside the adjustment groove, and the adjustment sleeve is threadedly connected to the inside of the adjustment groove.

[0010] Preferably, a rotating ring is slidably connected inside the protective sleeve, and the surface of the rotating ring is rotatably connected to one end of the adjusting sleeve.

[0011] Preferably, a fixing sleeve is fixedly connected to the surface of the protective sleeve, and the fixing sleeve is threadedly connected to the surface of the valve body.

[0012] Preferably, a second sealing sleeve is provided inside the sealing ring, and the second sealing sleeve is fixedly connected to the surface of the protective sleeve.

[0013] Preferably, the sealing ring has multiple sealing grooves inside, and each of the multiple sealing grooves has a sealing block slidably connected inside.

[0014] Preferably, one side of each of the plurality of sealing blocks is fixedly connected to the surface of the second sealing sleeve.

[0015] Preferably, the rotating ring is provided with a fixing device inside, the fixing device including a mounting groove and a magnet, the mounting groove being formed inside the rotating ring, and the magnet being fixedly connected inside the mounting groove.

[0016] Compared with related technologies, this utility model has the following beneficial effects:

[0017] This utility model provides an automatic compression device for sealing the valve stem packing of a gate valve. By using a protective sleeve in conjunction with a first sealing sleeve, a sealing ring, and a sealing ring, the compression spring is sealed, thereby preventing leakage of water or other conveyed materials from corroding the spring when the packing wears out, thus increasing the service life of the compression spring. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the first embodiment of the automatic pressing device for valve stem packing of the stop valve provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the valve body.

[0020] Figure 3 for Figure 2 The enlarged schematic diagram of part A shown below;

[0021] Figure 4 A schematic diagram of the second embodiment of the automatic pressing device for valve stem packing of a stop valve provided by this utility model;

[0022] Figure 5 for Figure 4 The diagram shows the structure of the second sealing sleeve.

[0023] Figure 6 for Figure 4 The enlarged schematic diagram of part B is shown.

[0024] The following are the labels in the diagram: 1. Valve body, 2. Protective device, 21. Protective sleeve, 22. First sealing sleeve, 23. Sealing ring, 24. Sealing ring, 3. Compression device, 31. Adjusting groove, 32. Compression spring, 33. Adjusting sleeve, 4. Rotating ring, 5. Fixed sleeve, 6. Second sealing sleeve, 7. Sealing groove, 8. Sealing block, 9. Fixing device, 91. Mounting groove, 92. Magnet. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] First embodiment:

[0027] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic diagram of the structure of the first embodiment of the automatic pressing device for valve stem packing of the stop valve provided by this utility model; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the valve body. Figure 3 for Figure 2 The enlarged schematic diagram of part A is shown. An automatic clamping device for the valve stem packing seal of a gate valve includes: a valve body 1, a protective device 2, and a clamping device 3;

[0028] The protective device 2 includes a protective sleeve 21, a first sealing sleeve 22, a sealing ring 23, and a sealing ring 24. The protective sleeve 21 is disposed inside the valve body 1. The first sealing sleeve 22 is slidably connected to the surface of the protective sleeve 21. The sealing ring 23 is fixedly connected to one end of the first sealing sleeve 22. The sealing ring 24 is fixedly connected to one end of the first sealing sleeve 22.

[0029] The extrusion device 3 includes an adjustment groove 31, an extrusion spring 32, and an adjustment sleeve 33. The adjustment groove 31 is opened inside the protective sleeve 21, the extrusion spring 32 is disposed inside the adjustment groove 31, and the adjustment sleeve 33 is threadedly connected to the inside of the adjustment groove 31.

[0030] The outer and inner surfaces of the protective sleeve 21 are slidably connected with first sealing sleeves 22, and one end of each of the two first sealing sleeves 22 is fixedly connected to the top of the sealing ring 23, and one end of each of the two first sealing sleeves 22 is fixedly connected with a sealing ring 24 to increase the sealing effect of the first sealing sleeves 22.

[0031] The adjusting sleeve 33 is a threaded sleeve, and the adjusting groove 31 has a thread inside that is compatible with the adjusting sleeve 33. When the adjusting sleeve 33 is rotated to one side, it moves inside the adjusting groove 31, which facilitates the replacement of the compression spring 32 or the adjustment of the pressure.

[0032] The protective sleeve 21 has a sliding connection to a rotating ring 4, and the surface of the rotating ring 4 is rotatably connected to one end of the adjusting sleeve 33.

[0033] The rotating ring 4 is used to reduce the friction between the adjusting sleeve 33 and the compression spring 32 when the adjusting sleeve 33 rotates.

[0034] A fixing sleeve 5 is fixedly connected to the surface of the protective sleeve 21, and the fixing sleeve 5 is threadedly connected to the surface of the valve body 1.

[0035] The fixed sleeve 5 has internal threads, and the valve body 1 has threads on its surface that are compatible with the fixed sleeve 5. This is used to fix the protective sleeve 21 after the fixed sleeve 5 is installed on the surface of the valve body 1, so as to facilitate the installation and removal of the protective sleeve 21.

[0036] The working principle of the automatic tightening device for valve stem packing seal of the gate valve provided by this utility model is as follows:

[0037] In use, the protective sleeve 21, together with the first sealing sleeve 22, the sealing ring 23 and the sealing ring 34, seals the compression spring 32 to prevent leaks from coming into contact with the compression spring 32, thereby preventing corrosion of the compression spring 32.

[0038] When the compression force of the compression spring 32 needs to be adjusted, the adjusting sleeve 33 is rotated to one side, thereby moving downward inside the adjusting groove 31 to compress the compression spring 32. When one end of the compression spring 32 moves downward, it pushes the sealing ring 23, which is connected to the first sealing sleeve 22, to move downward on the surface of the protective sleeve 21 to compress the filler.

[0039] Compared with related technologies, the automatic tightening device for valve stem packing seal of the gate valve provided by this utility model has the following beneficial effects:

[0040] This utility model provides an automatic compression device for sealing the valve stem packing of a gate valve. The protective sleeve 21, together with the first sealing sleeve 22, the sealing ring 23 and the sealing ring 34, seals the compression spring 32, thereby preventing the leakage of water or other conveyed materials from corroding the spring when the packing wears and leaks, thus increasing the service life of the compression spring 32.

[0041] Second embodiment:

[0042] Please refer to the following: Figure 4 , Figure 5and Figure 6 Based on the first embodiment of this application, which provides an automatic tightening device for the valve stem packing seal of a gate valve, the second embodiment of this application proposes another automatic tightening device for the valve stem packing seal of a gate valve. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0043] Specifically, the second embodiment of this application provides an automatic sealing device for the valve stem packing of a gate valve, which differs in that the sealing ring 24 has a second sealing sleeve 6 inside, and the second sealing sleeve 6 is fixedly connected to the surface of the protective sleeve 21.

[0044] The outer and inner surfaces of the protective sleeve 21 are both fixedly connected with a second sealing sleeve 6.

[0045] The sealing ring 24 has multiple sealing grooves 7 inside, and each of the multiple sealing grooves 7 has a sealing block 8 slidably connected inside.

[0046] One side of each of the multiple sealing blocks 8 is fixedly connected to the surface of the second sealing sleeve 6.

[0047] Multiple sealing blocks 8 work in conjunction with multiple sealing grooves 7 to increase the contact area between the sealing ring 24 and the second sealing sleeve 6, thereby increasing the sealing effect.

[0048] The rotating ring 4 is provided with a fixing device 9 inside. The fixing device 9 includes a mounting groove 91 and a magnet 92. The mounting groove 91 is opened inside the rotating ring 4, and the magnet 92 is fixedly connected to the inside of the mounting groove 91.

[0049] The magnet 92 is annular, and the mounting groove 91 is an annular groove adapted to the magnet 92. After the magnet 92 attracts one end of the compression spring 32, the compression spring 32 is moved upward and removed when the adjusting sleeve 33 is moved upward.

[0050] The working principle of this utility model is as follows:

[0051] In use, by rotating the adjusting sleeve 33 to one side, it moves upward inside the adjusting groove 31. The magnet 92 attracts the compression spring 32 and moves it upward. When the adjusting sleeve 33 moves upward, it drives the compression spring 32 to move upward from inside the adjusting groove 31 and be taken out.

[0052] Compared with related technologies, the automatic tightening device for valve stem packing seal of the gate valve provided by this utility model has the following beneficial effects:

[0053] This utility model provides an automatic compression device for the valve stem packing seal of a stop valve. When the adjusting sleeve 33 is removed, the magnet 92 pulls out the compression spring 32, thereby facilitating the removal of the compression spring 32.

[0054] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An automatic tightening device for the valve stem packing seal of a gate valve, characterized in that, include: Valve body (1), protective device (2), and extrusion device (3); The protective device (2) includes a protective sleeve (21), a first sealing sleeve (22), a sealing ring (23), and a sealing ring (24). The protective sleeve (21) is disposed inside the valve body (1). The first sealing sleeve (22) is slidably connected to the surface of the protective sleeve (21). The sealing ring (23) is fixedly connected to one end of the first sealing sleeve (22). The sealing ring (24) is fixedly connected to one end of the first sealing sleeve (22). The extrusion device (3) includes an adjustment groove (31), an extrusion spring (32), and an adjustment sleeve (33). The adjustment groove (31) is opened inside the protective sleeve (21), the extrusion spring (32) is disposed inside the adjustment groove (31), and the adjustment sleeve (33) is threadedly connected to the inside of the adjustment groove (31).

2. The automatic tightening device for the valve stem packing seal of a gate valve according to claim 1, characterized in that, The protective sleeve (21) has a rotating ring (4) slidably connected inside, and the surface of the rotating ring (4) is rotatably connected to one end of the adjusting sleeve (33).

3. The automatic tightening device for the valve stem packing seal of a gate valve according to claim 2, characterized in that, The protective sleeve (21) is fixedly connected to a fixing sleeve (5), which is threaded to the surface of the valve body (1).

4. The automatic tightening device for the valve stem packing seal of a gate valve according to claim 1, characterized in that, The sealing ring (24) has a second sealing sleeve (6) inside, and the second sealing sleeve (6) is fixedly connected to the surface of the protective sleeve (21).

5. The automatic tightening device for the valve stem packing seal of a gate valve according to claim 4, characterized in that, The sealing ring (24) has multiple sealing grooves (7) inside, and each of the multiple sealing grooves (7) is slidably connected to a sealing block (8).

6. The automatic tightening device for the valve stem packing seal of a gate valve according to claim 5, characterized in that, One side of each of the plurality of sealing blocks (8) is fixedly connected to the surface of the second sealing sleeve (6).

7. The automatic tightening device for the valve stem packing seal of a gate valve according to claim 2, characterized in that, The rotating ring (4) is provided with a fixing device (9) inside. The fixing device (9) includes a mounting groove (91) and a magnet (92). The mounting groove (91) is opened inside the rotating ring (4), and the magnet (92) is fixedly connected to the inside of the mounting groove (91).

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