Fireproof ball valve sealing structure

Abstract

The utility model discloses a fireproof ball valve sealing structure which comprises a valve body, a valve shaft is installed at the upper end of the valve body, a sleeve is fixedly connected to the upper end of the valve body, and the valve shaft penetrates through the sleeve. The sealing mechanism comprises a sealing filler filled in a gap between the valve shaft and the sleeve, a pressing ring is placed at the upper end of the sealing filler, and the valve shaft penetrates through the pressing ring and is in sliding connection with the pressing ring; and the pressing mechanism is used for pressurizing the pressing ring and improving the overall sealing performance, the pressing mechanism comprises two connecting half discs, the lower ends of the two connecting half discs are fixedly connected with connecting half rings, two first through openings are formed in the upper ends of the connecting rings, and the two connecting half discs are jointly provided with a second through opening. When the sealing structure is used, the gland part is made into a split type, so that the sealing filler is convenient to replace, and in addition, the magnetic ring is used, so that the later replacement operation is further convenient to carry out.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a fireproof ball valve sealing structure. Background Technology

[0002] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves are used in fluid control systems and 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. From the simplest shut-off valves to the various valves used in extremely complex automatic control systems, there are a wide variety of types and specifications, such as shut-off valves, butterfly valves, flow valves, solenoid valves, and ball valves. Ball valves are widely used as a type of valve.

[0003] Since the valve shaft and the main body of the ball valve are actually rotatably connected, a gland is often used in conjunction with the sealing packing to pressurize and seal the connection to ensure sealing. However, the sealing packing has a certain service life and generally needs to be replaced. Traditional glands are usually one piece and are large, which can obstruct the operating space when the sealing packing is replaced. Therefore, how to solve this problem needs to be considered. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a fireproof ball valve sealing structure. In use, the gland part is made into a split type, which facilitates the replacement of the sealing packing. In addition, the use of a magnetic ring further facilitates the replacement operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fireproof ball valve sealing structure includes a valve body, a valve shaft mounted on the upper end of the valve body, a sleeve fixedly connected to the upper end of the valve body, and the valve shaft passing through the sleeve; a sealing mechanism, the sealing mechanism including sealing packing filling the gap between the valve shaft and the sleeve, a pressure ring placed at the upper end of the sealing packing, the valve shaft passing through the pressure ring and being slidably connected; and a pressing mechanism for pressurizing the pressure ring to improve the overall sealing performance.

[0007] Preferably, the pressing mechanism includes two connecting half-discs, and the lower ends of the two connecting half-discs are fixedly connected to connecting half-rings.

[0008] Preferably, the upper end of the connecting ring has two first ports, and the two connecting half discs are provided with a second port.

[0009] Preferably, a bolt is arranged through each of the first through hole and the corresponding second through hole, and a threaded portion of each of the bolts is threadedly connected with a nut.

[0010] Preferably, two magnetic insertion strips are fixedly connected to the right side of the left connecting half disc, two insertion slots are symmetrically formed on the left side of the right connecting half disc, and iron blocks are embedded on the inner walls of the two insertion slots away from the left side of the connecting half disc.

[0011] Preferably, a magnetic ring is fixedly connected to the valve shaft, and the material of the compression ring is an iron alloy.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] Two connecting half discs are arranged, the connecting half ring can be separated from the valve shaft when the sealing filler needs to be replaced, the operation space is large during the replacement process, the replacement operation is facilitated, in addition, the magnetic ring is arranged, the compression ring is pushed up and slid upward to the magnetic ring during replacement of the sealing filler, and the actual operation is further facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure diagram of a fireproof ball valve sealing structure is provided in the utility model;

[0015] Figure 2 A Figure 1 sealing part explosion view;

[0016] Figure 3 A Figure 2 left side view;

[0017] Figure 4 A Figure 1 cross-sectional view.

[0018] In the figure: 1 valve body, 2 sleeve, 3 connecting ring, 4 valve shaft, 5 magnetic ring, 6 connecting half disc, 7 bolt, 8 nut, 9 first through hole, 10 compression ring, 11 second through hole, 12 magnetic insertion strip, 13 insertion slot, 14 sealing filler. DETAILED DESCRIPTION

[0019] In the description of the present application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the size of each part shown in the drawings is not drawn according to the actual proportional relationship. The technology, method and equipment known to those skilled in the related art can not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0020] Reference Figures 1-4 A fireproof ball valve sealing structure, comprising a valve body 1, a valve shaft 4 is installed at the upper end of the valve body 1, a sleeve 2 is fixedly connected to the upper end of the valve body 1, and the valve shaft 4 penetrates the sleeve 2;

[0021] Further comprising a sealing mechanism, the sealing mechanism comprises a sealing filler 14 filled in the gap between the valve shaft 4 and the sleeve 2, and a compression ring 10 is placed at the upper end of the sealing filler 14, the valve shaft 4 penetrates the compression ring 10 and is connected slidingly;

[0022] Further comprising a compression mechanism, the compression mechanism is used for pressurizing the compression ring 10 to improve the overall sealing performance, the compression mechanism comprises two connecting half-discs 6, the lower end of each connecting half-disc 6 is fixedly connected with a connecting half-ring, the upper end of the connecting ring 3 is provided with two first through holes 9, the two connecting half-discs 6 are commonly provided with a second through hole 11, a bolt 7 is commonly penetrated on each first through hole 9 and the corresponding second through hole 11, and the threaded portion of each bolt 7 is threadedly connected with a nut 8;

[0023] Further comprising two magnetic insertion strips 12 fixedly connected to the right side of the connecting half-disc 6 on the left side, two insertion grooves 13 are symmetrically provided on the left side of the connecting half-disc 6 on the right side, an iron block is embedded on the inner wall of the side away from the left connecting half-disc 6, a magnetic ring 5 is fixedly connected to the valve shaft 4, and the material of the compression ring 10 is a ferrous alloy.

[0024] In the utility model, the sealing can be realized by the setting of the sealing filler 14 and the compression of the compression ring 10. When the sealing filler 14 needs to be replaced, the two nuts 8 and bolts 7 are first removed, then the two connecting half-discs 6 are lifted and separated, the compression ring 10 is pushed up and slid upward to the magnetic ring 5, and the sealing filler 14 can be replaced after being attracted by the magnetic ring 5. In the replacement process, the operation space is large, and the actual operation is facilitated.

[0025] After the replacement operation is completed, the compression ring 10 is sleeved on the inner side of the sleeve 2 again, then the two connecting half-discs 6 are butted, and the bolt 7 and the nut 8 are used to limit on the connecting ring 3.

[0026] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A sealing structure for a fireproof ball valve, characterized in that, include: A valve body (1) is provided with a valve shaft (4) installed at the upper end of the valve body (1), and a sleeve (2) is fixedly connected to the upper end of the valve body (1). The valve shaft (4) passes through the sleeve (2). A sealing mechanism, comprising a sealing packing (14) filled in the gap between the valve shaft (4) and the sleeve (2), wherein a pressure ring (10) is placed at the upper end of the sealing packing (14), and the valve shaft (4) passes through the pressure ring (10) and is slidably connected; A pressing mechanism is used to pressurize the pressure ring (10) to improve the overall sealing performance.

2. The fireproof ball valve sealing structure according to claim 1, characterized in that, The pressing mechanism includes two connecting half-discs (6), and the lower ends of the two connecting half-discs (6) are fixedly connected with connecting half-rings.

3. The fireproof ball valve sealing structure according to claim 2, characterized in that, It also includes a connecting ring (3), the upper end of which has two first ports (9), and the two connecting half-plates (6) are provided with a second port (11).

4. The fireproof ball valve sealing structure according to claim 3, characterized in that, Each of the first opening (9) and the corresponding second opening (11) is provided with a bolt (7) through it, and each bolt (7) is threaded with a nut (8).

5. The fireproof ball valve sealing structure according to claim 2, characterized in that, Two magnetic strips (12) are fixedly connected to the right side of the connecting half-disc (6) on the left side. Two slots (13) are symmetrically opened on the left side of the connecting half-disc (6) on the right side. Iron blocks are embedded on the inner wall of the two slots (13) away from the left connecting half-disc (6).

6. The fireproof ball valve sealing structure according to claim 1, characterized in that, A magnetic ring (5) is fixedly connected to the valve shaft (4), and the pressure ring (10) is made of an iron alloy.

Images