Side disassembly type stop valve

Abstract

The utility model discloses a side disassembly type stop valve which comprises a valve body, a valve rod and a valve plate, an installation groove is formed in one end of the valve plate, the valve rod stretches into the installation groove and then is installed in an axial linkage mode through a stud, and the valve plate is matched with a sealing seat on the valve body to cut off a medium flow channel along with axial movable lifting of the valve rod. The diameter of an upper runner hole formed in the valve body end mounting flange is larger than that of the valve plate, and the valve plate is taken out from the upper runner hole in one side relative to the valve body; according to the side disassembly type stop valve, when the interior of the valve body is disassembled, assembled and maintained, the valve cover and related structures do not need to be disassembled, abrasion to the valve cover in the disassembling and assembling process is reduced, and the situation that after the valve rod is disassembled and assembled, reinstallation influences the position of the valve rod is avoided; the valve plate and the sealing abutting piece are disassembled and taken out from the side face flow channel opening, disassembly, assembly and maintenance work of the sealing assembly is greatly facilitated, and the influence on sealing between the valve deck and the valve body is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a side-disassembly gate valve. Background Technology

[0002] Gate valves, also known as stop valves, are the most widely used type of valve. They are popular because of the low friction between the sealing surfaces during opening and closing, making them relatively durable. They also have a small opening height, are easy to manufacture, and are convenient to maintain. They are suitable not only for medium and low pressure but also for high pressure. The closing principle of a gate valve is to rely on the pressure of the valve stem to make the valve disc sealing surface and the sealing seat sealing surface fit tightly together, thus preventing the flow of media.

[0003] A typical gate valve generally consists of a valve body, valve cover, valve plate, sealing packing covering the valve stem, and a drive unit for driving the valve stem. In common maintenance procedures, the valve cover is opened to remove the valve stem and valve plate from the valve body for cleaning. This approach requires opening the side inlet / outlet ports to clean the bottom of the valve body's media flow path, allowing tools to be inserted for cleaning. Furthermore, the disassembly of the valve cover inevitably leads to the disassembly of the valve stem relative to the valve body, potentially causing slight misalignment based on the valve cover installation. This can affect the concentricity of the valve stem and valve body, easily leading to increased wear on the valve plate and sealing seat. Additionally, if the drive unit is electric or pneumatic, disassembling the valve cover has a relatively large impact on its connection. Therefore, it is necessary to design a valve solution that allows maintenance of the internal sealing components without disassembling the valve body and valve cover. Utility Model Content

[0004] The purpose of this utility model is to provide a side-disassembly shut-off valve structure that allows for internal disassembly from the side flow channel without disassembling the valve cover.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a side-disassembly gate valve, including a valve body, a valve stem, and a valve plate. One end of the valve plate is provided with an installation groove. After the valve stem extends into the installation groove, it is axially linked and installed by setting a stud. The valve plate moves up and down with the valve stem along with the axial movement, and cooperates with the sealing seat on the valve body to cut off the medium flow channel. The diameter of the upper flow channel hole provided on the valve body end mounting flange is larger than the diameter of the valve plate. The valve plate is taken out from the upper flow channel hole on one side relative to the valve body.

[0006] As a further feature of the above solution, the mounting groove includes a valve hole for the valve stem to extend into and a radial hole for the stud to extend into, and the valve stem is provided with a locking hole that matches the stud.

[0007] As a further feature of the above solution, the sealing seat is provided with a sealing abutment, the sealing abutment is provided with a positioning hole, and the sealing seat is provided with a limit bolt and a bolt hole on the side facing the lower flow channel hole provided on the mounting flange.

[0008] As a further provision of the above solution, the sealing seat is provided with a sealing ring platform, and the sealing abutment is provided with a sealing ring on the side opposite to the sealing ring platform.

[0009] As a further provision of the above scheme, the valve body is also provided with a valve cover and a pressure cap that is fastened to the valve cover by bolts. The valve stem passes through the valve cover and the pressure cap, and a sealing packing assembly is sleeved between the two. The top and bottom of the packing groove formed by the valve cover and the pressure cap are provided with tapered surfaces.

[0010] As a further feature of the above scheme, the bottom of the valve plate is also provided with a self-sealing cylinder, which includes a concave part and a cylinder wall connected to the concave part by a bridge rib.

[0011] Beneficial effects: The side-disassembly gate valve of this utility model has a structure that allows for the removal of the internal sealing components from the side. Firstly, it eliminates the need to disassemble the valve cover, reducing wear on the valve cover during disassembly. Secondly, it reduces the impact of valve cover disassembly on the valve stem position, effectively reducing eccentricity and preventing wear on the valve plate. In addition, when cleaning the valve body from the side-disassembly flow channel, the valve plate and sealing components can be removed from the disassembled flow channel, greatly facilitating the disassembly and maintenance of the sealing components and reducing the impact on the seal between the valve cover and the valve body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the side-disassembly shut-off valve structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of the shut-off valve in this embodiment.

[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the shut-off valve in this embodiment.

[0015] Figure 4 This is a schematic diagram of the valve plate structure in this embodiment.

[0016] Reference numerals: 1. Valve body; 11. Mounting flange; 12. Upper flow channel hole; 13. Lower flow channel hole; 15. Bolt hole; 2. Valve stem; 21. Valve hole; 22. Radial hole; 23. Lock hole; 3. Valve plate; 31. Mounting groove; 32. Stud; 33. Self-sealing cylinder; 34. Concave part; 35. Bridge rib; 36. Cylinder wall; 4. Sealing seat; 41. Sealing abutment; 42. Positioning hole; 43. Sealing ring platform; 44. Sealing ring; 5. Medium flow channel; 6. Valve cover; 61. Packing groove; 62. Tapered surface; 7. Gland; 71. Bolt; 8. Sealing packing assembly. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0018] like Figure 1-4 The side-disassembly gate valve shown includes a valve body 1, a valve stem 2, and a valve plate 3. One end of the valve plate 3 is provided with an installation groove 31. After the valve stem 2 extends into the installation groove 31, it is axially linked and installed by a stud 32. The valve plate 3 moves up and down with the valve stem 2 in axial movement, and cooperates with the sealing seat 4 on the valve body 1 to cut off the medium flow channel 5. The diameter of the upper flow channel hole 12 provided on the mounting flange 11 at the end of the valve body 1 is larger than the diameter of the valve plate 3. The valve plate 3 is taken out from the upper flow channel hole 12 on one side relative to the valve body 1.

[0019] As a further feature of the above scheme, the mounting groove 31 includes a valve hole 21 for the valve stem 2 to extend into and a radial hole 22 for the stud 32 to extend into, and the valve stem 2 is provided with a locking hole 23 that matches the stud 32.

[0020] As a further provision of the above scheme, the sealing seat 4 is provided with a sealing abutment 41, the sealing abutment 41 is provided with a positioning hole 42, the sealing seat 4 is provided with a limit bolt and a bolt hole 15 on the side facing the lower flow channel hole 13 provided on the mounting flange 11, the sealing seat 4 is provided with a sealing ring platform 43, and the sealing abutment 41 is provided with a sealing ring 44 on the side opposite to the sealing ring platform 43.

[0021] As a further provision of the above scheme, the valve body 1 is also provided with a valve cover 6 and a pressure cap 7 fastened to the valve cover 6 by bolts 71. The valve stem 2 passes through the valve cover 6 and the pressure cap 7, and a sealing packing assembly 8 is sleeved between the two. The top and bottom of the packing groove 61 formed by the valve cover 6 and the pressure cap 7 are provided with tapered surfaces 62.

[0022] As a further provision of the above scheme, the bottom of the valve plate 3 is also provided with a self-sealing cylinder 33, the self-sealing cylinder 33 including a concave part 34 and a cylinder wall 36 connected to the concave part 34 by a bridge rib 35.

[0023] refer to Figure 1-4 The present invention discloses a side-disassembly gate valve. The gate valve in this embodiment includes a valve body 1, a valve stem 2, and a valve plate 3. In this embodiment, in order to reduce the impact on the sealing effect of the sealing packing assembly 8 at the valve cover 6 and the gland 7 during maintenance, the gate valve in this embodiment can be disassembled from both sides of the medium flow channel 5 of the valve body 1, in addition to the existing side disassembly of the valve cover 6. The disassembly structure includes the valve plate 3 and the sealing abutment 41 structure on the sealing seat 4. Compared with the prior art, the valve in this embodiment can be disassembled from the flow channel opening to clean, replace, and maintain the valve plate 3 and the sealing abutment 41, reducing the problem of wear affecting the sealing effect caused by repeated disassembly and assembly of the valve cover.

[0024] refer to Figure 2-4 As shown, in this embodiment, the valve plate 3 is provided with a mounting groove 31 at one end. After the valve stem 2 extends into the mounting groove 31, it is axially linked and installed by setting a stud 32. The valve plate 3 moves up and down with the valve stem 2 in the axial direction to form a sealing contact with the sealing seat 4 on the valve body 1, thereby cutting off the medium flow channel 5 and separating the connection between the two valve plates 3. The mounting flanges 11 at both ends of the valve body 1 are provided with flow channel holes. The diameter of the upper flow channel hole 12 is larger than the diameter of the valve plate 3. In this way, the valve plate 3 after the stud 32 is removed can be taken out from the upper flow channel hole 12 on one side relative to the valve body 1.

[0025] Furthermore, the mounting groove 31 in this embodiment includes a valve hole 21 for the valve stem 2 to extend into and a radial hole 22 for the stud 32 to extend into. The valve stem 2 is provided with a locking hole 23 that matches the stud 32. During installation, the operator first lifts the valve stem 2 to make room using a drive device, then places the valve plate 3 into the medium flow channel 5 from the side of the upper flow channel hole 12, aligning it with the installation position inside the valve body 1. The valve stem 2 is then driven downward until it is inserted into the valve hole 21 of the mounting groove 31 at the upper end of the valve plate 3. Subsequently, the stud 32 is inserted from the radial hole 22 into the locking hole 23 of the valve stem 2 for fixation. It is worth noting that after the stud 32 is installed, it will extend from both ends of the locking hole 23 on the valve stem 2. The length of the extended stud 32 is greater than the diameter of the valve hole 21. Therefore, it forms a relative separation restriction between the valve stem 2 and the valve plate 3, so that when the valve stem 2 moves axially, it will drive the valve plate 3 to rise and fall, thereby achieving sealing control between the valve plate 3 and the sealing seat 4.

[0026] Furthermore, in this embodiment, the sealing seat 4 is provided with a sealing abutment 41, which has a positioning hole 42. The sealing seat 4 has a limiting bolt and a bolt hole 15 on the side facing the flow channel hole 13 on the mounting flange 11. The sealing seat 4 also has a sealing ring platform 43, and the sealing abutment 41 has a sealing ring 44 on the side opposite the sealing ring platform 43. As described above, the sealing seat 4 in this embodiment is provided with a sealing abutment 41. If necessary, the sealing abutment 41 can be further disassembled and maintained after the valve plate 3 is removed. Specifically, after disassembling the valve plate 3, the worker can proceed with the flow channel... Insert a tool into the side of the channel hole 13 and screw it out of the limiting bolt located in the bolt hole 15. After removing the limiting bolt, the sealing abutment 41 can be dislodged from the sealing seat 4 and removed from the upper flow channel hole 12. During installation, the operation is reversed. It is worth noting that when the limiting bolt is fixed relative to the bolt hole 15, pay attention to the screwing depth. Its main purpose is to prevent the sealing abutment 41 from falling off the sealing seat 4 during use. It does not need to be tightened. Therefore, the diameter of the positioning hole 42 provided on the sealing abutment 41 should be larger than that of the bolt hole 15. The limiting bolt can be installed by threaded connection with the bolt hole 15.

[0027] Furthermore, the bottom of the valve plate 3 is also provided with a self-sealing cylinder 33. The self-sealing cylinder 33 includes a concave part 34 and a cylinder wall 36 connected to the concave part 34 through a bridge rib 35. Under the pressure of the medium from the lower flow port 13 side, the concave part 34 is subjected to pressure and thus deforms. Based on the deformation of its structure, the medium force is squeezed onto the concave part 34 and transmitted to the cylinder wall 36 through the bridge rib 35, thereby pushing the cylinder wall 36 to expand and fit tightly against the inner wall of the sealing abutment 41, thereby enhancing the sealing effect based on the medium pressure.

[0028] In a further embodiment, the valve body 1 is also provided with a valve cover 6 and a pressure cap 7 fastened to the valve cover 6 by bolts 71. The valve stem 2 passes through the valve cover 6 and the pressure cap 7, and a sealing packing assembly 8 is sleeved between the two. The top and bottom of the packing groove 61 formed by the valve cover 6 and the pressure cap 7 are provided with tapered surfaces 62. When the pressure cap 7 is fastened by bolts 71, the pressure cap 7 presses the sealing packing assembly 8 downward. Based on the tapered surface 62 located in the packing groove 61, the sealing packing assembly 8 is squeezed and deformed towards the center, improving the sealing effect and forming a sealed wrapping of the valve stem 2.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A side-stripped stop valve comprising a valve body (1), a valve stem (2) and a valve plate (3), characterized in that: The valve plate (3) is provided with an installation groove (31) at one end. After the valve stem (2) extends into the installation groove (31), it is axially linked and installed by setting a stud (32). The valve plate (3) moves up and down with the valve stem (2) to cooperate with the sealing seat (4) on the valve body (1) to cut off the medium flow channel (5). The diameter of the upper flow channel hole (12) provided on the end flange (11) of the valve body (1) is larger than the diameter of the valve plate (3). The valve plate (3) is taken out from the upper flow channel hole (12) on one side relative to the valve body (1).

2. A side-dismantling stop valve according to claim 1, characterized in that: The mounting groove (31) includes a valve hole (21) for the valve stem (2) to extend into and a radial hole (22) for the stud (32) to extend into. The valve stem (2) is provided with a locking hole (23) that matches the stud (32).

3. A side-dismantling stop valve according to claim 1, characterized in that: The sealing seat (4) is provided with a sealing abutment (41), the sealing abutment (41) is provided with a positioning hole (42), and the sealing seat (4) is provided with a limit bolt and a bolt hole (15) on the side facing the lower flow channel hole (13) provided on the mounting flange (11).

4. A side-dismantling stop valve according to claim 3, characterized in that: The sealing seat (4) is provided with a sealing ring platform (43), and the sealing abutment (41) is provided with a sealing ring (44) on the side opposite to the sealing ring platform (43).

5. A side-dismantling stop valve according to claim 1, characterized in that: The valve body (1) is also provided with a valve cover (6) and a pressure cap (7) fastened to the valve cover (6) by bolts (71). The valve stem (2) passes through the valve cover (6) and the pressure cap (7), and a sealing packing assembly (8) is sleeved between the two. The top and bottom of the packing groove (61) formed by the valve cover (6) and the pressure cap (7) are provided with tapered surfaces (62).

6. A side-dismantling stop valve according to claim 1, characterized in that: The bottom of the valve plate (3) is also provided with a self-sealing cylinder (33), which includes a concave part (34) and a cylinder wall (36) connected to the concave part (34) by a bridge rib (35).

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