Valve cover structure of pressure sealing valve

Abstract

The utility model relates to the technical field of sealing valves, in particular to a pressure sealing valve bonnet structure which comprises a bonnet, a valve rod and a stuffing box, the valve rod and the stuffing box are arranged on the bonnet, the bonnet is in threaded connection with a fixing seat, a pressing sleeve is arranged in the fixing seat, a pressing plate is arranged above the pressing sleeve, and a sealing ring is arranged on the pressing plate. The pressing plate is connected with the fixing base through a plurality of bolts. According to the pressure sealing valve, the rubber pads of the locking blocks can be tightly attached to the surface of the valve cover, the clamping rods can be connected with the pressing plate in a clamping mode, when the pressing plate is connected with the valve cover, threaded holes do not need to be drilled in the valve cover, the strength of the valve cover is effectively prevented from becoming poor, the service life of the valve cover is prolonged, and use of the pressure sealing valve is facilitated.

Description

Technical Field

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

[0002] With the continuous development of society and the continuous progress of technology, the technology related to pressure sealing valves is also constantly improving. Currently, the commonly used pressure sealing valve cover structure is to directly connect the pressure plate to the valve cover with bolts. This connection method requires drilling threaded holes in the valve cover and using long bolts to fix the pressure plate.

[0003] The current method of connecting the valve cover to the pressure plate using long bolts and drilling multiple threaded holes in the valve cover can easily lead to a decrease in the strength of the valve cover, which in turn can shorten the service life of the valve cover and is not conducive to the use of pressure sealing valves. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a pressure-sealing valve cover structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pressure-sealed valve cover structure includes a valve cover, a valve stem and a stuffing box disposed on the valve cover. A fixed seat is threaded onto the valve cover, a clamping sleeve is disposed within the fixed seat, and a pressure plate is disposed above the clamping sleeve. The pressure plate is connected to the fixed seat by multiple bolts. Multiple sliding rods are slidably connected to the fixed seat, and annular sleeves are fixedly installed at the upper ends of the sliding rods. Multiple L-shaped plates are fixedly installed on the fixed seat, and each L-shaped plate is provided with a limit assembly. The limit assembly includes a locking rod slidably mounted on the L-shaped plate, which engages with the pressure plate. Multiple extrusion ports with right-angled trapezoidal cross-sections are opened within the annular sleeve. One end of each locking rod is fitted against the inclined inner wall of the corresponding extrusion port. A spring is sleeved on each locking rod, one end of which is fixedly connected to the locking rod, and the other end of which is fixedly connected to the L-shaped plate. A locking assembly is disposed on the fixed seat.

[0007] To better achieve the above objectives, the present invention adopts a further technical solution: the locking assembly includes a plurality of telescopic rods fixedly installed on the inner surface of the fixed base, and each telescopic rod has a locking block fixedly connected to its telescopic end.

[0008] To better achieve the above objectives, the present invention adopts a further technical solution: each of the slide bars is hinged with a hinge rod, and the hinge rod is hinged to the corresponding locking block.

[0009] To better achieve the above objectives, the present invention adopts a further technical solution: a rubber pad is fixedly connected to one side surface of each locking block, and the rubber pad is in contact with the surface of the valve cover.

[0010] To better achieve the above objectives, the present invention adopts a further technical solution: a threaded rod is threadedly connected to the fixed base, and the threaded rod and the annular sleeve are rotatably connected.

[0011] The beneficial effects of this utility model are as follows: First, the fixed seat is threadedly connected to the valve cover. Then, the clamping sleeve is placed inside the fixed seat, the pressure plate is placed on the upper surface of the clamping sleeve, and one end of each bolt passes through the pressure plate and is threadedly connected to the fixed seat. Then, the threaded rod is rotated, which drives the annular sleeve to move vertically downward. The rubber pads of each locking block will be in close contact with the surface of the valve cover, and multiple locking rods will also be engaged with the pressure plate. When connecting the pressure plate to the valve cover, it is not necessary to drill threaded holes in the valve cover, which effectively avoids the weakening of the valve cover's strength, thereby helping to extend the service life of the valve cover and facilitating the use of pressure sealing valves. Attached Figure Description

[0012] Figure 1 This is a front view of the valve cover structure of a pressure sealing valve proposed in this utility model;

[0013] Figure 2 This is a top view of the valve cover structure of a pressure sealing valve proposed in this utility model;

[0014] Figure 3 This is a front internal structural diagram of a pressure-sealing valve cover structure proposed in this utility model;

[0015] Figure 4 This is a side internal structure diagram of a pressure sealing valve cover structure proposed in this utility model;

[0016] Figure 5 for Figure 4 A magnified view of part A in the image.

[0017] In the diagram: 1 Valve cover, 2 Valve stem, 3 Annular sleeve, 4 Slide rod, 5 Fixed seat, 6 Pressure plate, 7 Bolt, 8 Locking block, 9 L-shaped plate, 10 Spring, 11 Clamping rod, 12 Extrusion port, 13 Hinge rod, 14 Stuffing gland, 15 Telescopic rod, 16 Threaded rod, 17 Pressure sleeve. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Reference Figures 1-5A pressure-sealed valve cover structure includes a valve cover 1, a valve stem 2 mounted on the valve cover 1, and a stuffing box 14. A fixed seat 5 is threaded onto the valve cover 1. A clamping sleeve 17 is disposed inside the fixed seat 5. A pressure plate 6 is disposed above the clamping sleeve 17. The pressure plate 6 is connected to the fixed seat 5 by multiple bolts 7. Multiple sliding rods 4 are slidably connected to the fixed seat 5. An annular sleeve 3 is fixedly installed at the upper end of each sliding rod 4. Multiple L-shaped plates 9 are fixedly installed on the fixed seat 5. Each L-shaped plate 9 is provided with a limit assembly, which includes a locking rod 11 slidably mounted on the L-shaped plate 9. The clamping rod 11 and the pressure plate 6 are engaged. The annular sleeve 3 has multiple extrusion ports 12 with right-angled trapezoidal cross sections. One end of each clamping rod 11 is attached to the inclined inner wall of the corresponding extrusion port 12. A spring 10 is fitted on each clamping rod 11. One end of the spring 10 is fixedly connected to the clamping rod 11, and the other end of the spring 10 is fixedly connected to the L-shaped plate 9. As the annular sleeve 3 moves down and slides relative to the fixed seat 5, the inclined inner wall of each extrusion port 12 will move along the end face of the clamping rod 11, thereby causing the clamping rod 11 to slide relative to the L-shaped plate 9, and the spring 10 to deform.

[0020] A locking assembly is provided on the fixed base 5. The locking assembly includes multiple telescopic rods 15 fixedly installed on the inner surface of the fixed base 5. Each telescopic rod 15 has a locking block 8 fixedly connected to its telescopic end. Each sliding rod 4 has a hinge rod 13 hinged to it. The hinge rod 13 is hinged to the corresponding locking block 8. A rubber pad is fixedly connected to one side surface of each locking block 8. The rubber pad is in contact with the surface of the valve cover 1. A threaded rod 16 is threadedly connected to the fixed base 5. The threaded rod 16 is rotatably connected to the annular sleeve 3. The upper end of the threaded rod 16 is rotatably connected to the annular sleeve 3 and cannot be disengaged. Rotating the threaded rod 16... 6. During the threaded connection between the threaded rod 16 and the fixed seat 5, the threaded rod 16 will rotate relative to the annular sleeve 3, and drive the annular sleeve 3 to move vertically downward. At the same time, each sliding rod 4 will slide relative to the fixed seat 5, and the tilt angle of each hinge rod 13 will change. Each locking block 8 will move towards the valve cover 1 until the rubber pad is in close contact with the surface of the valve cover 1. The telescopic rod 15 will undergo telescopic deformation. When multiple rubber pads are in close contact with the side surfaces of the valve cover 1 respectively, the fixed seat 5 can be effectively prevented from loosening, thereby preventing the fixed seat 5 from moving along the valve rod 2.

[0021] During installation, the fixing seat 5 is first fitted onto the outside of the valve cover 1, and the fixing seat 5 is threadedly connected to the valve cover 1. Then, the clamping sleeve 17 is placed inside the fixing seat 5, and the clamping sleeve 17 contacts the surface of the stuffing box 14. Next, the pressure plate 6 is placed on the upper surface of the clamping sleeve 17, and one end of each bolt 7 passes through the pressure plate 6 and is threadedly connected to the fixing seat 5. Under the locking action of the bolts 7, the clamping sleeve 17 can compress the stuffing box 14, thereby achieving a sealing effect. Then, the threaded rod 16 is rotated. During the threaded connection between the threaded rod 16 and the fixing seat 5, the threaded rod 16 will rotate relative to the annular sleeve 3, causing the annular sleeve 3 to rotate vertically. As the valve moves downward, each sliding rod 4 slides relative to the fixed seat 5 simultaneously, the tilt angle of the hinge rod 13 changes, and each locking block 8 moves towards the valve cover 1 until the rubber pad is in close contact with the surface of the valve cover 1. The telescopic rod 15 undergoes telescopic deformation. During the downward movement of the annular sleeve 3, the inclined inner wall of each extrusion port 12 moves against the end face of the clamp rod 11, thereby causing the clamp rod 11 to slide relative to the L-shaped plate 9. The spring 10 deforms, and after one end of the clamp rod 11 moves, it will engage with the pressure plate 6. When connecting the pressure plate 6 to the valve cover 1, it is not necessary to drill threaded holes in the valve cover 1, which effectively avoids the weakening of the valve cover 1's strength, thus helping to extend the service life of the valve cover 1 and benefiting the use of the pressure sealing valve.

Claims

1. A pressure-sealed valve cover structure, comprising a valve cover (1), a valve stem (2) disposed on the valve cover (1), and a stuffing box (14), characterized in that, A fixed seat (5) is threaded onto the valve cover (1). A clamping sleeve (17) is provided inside the fixed seat (5). A pressure plate (6) is provided above the clamping sleeve (17). The pressure plate (6) is connected to the fixed seat (5) by multiple bolts (7). Multiple sliding rods (4) are slidably connected to the fixed seat (5). An annular sleeve (3) is fixedly installed at the upper end of the multiple sliding rods (4). Multiple L-shaped plates (9) are fixedly installed on the fixed seat (5). Each L-shaped plate (9) is provided with a limit component. The limit component includes a slidingly mounted... The L-shaped plate (9) has a locking rod (11) that is engaged with the pressure plate (6). The annular sleeve (3) has multiple extrusion ports (12) with right-angled trapezoidal cross sections. One end of each locking rod (11) is attached to the inclined inner wall of the corresponding extrusion port (12). Each locking rod (11) is fitted with a spring (10). One end of the spring (10) is fixedly connected to the locking rod (11), and the other end of the spring (10) is fixedly connected to the L-shaped plate (9). The fixing seat (5) is provided with a locking assembly.

2. The valve cover structure of a pressure-sealed valve according to claim 1, characterized in that, The locking assembly includes a plurality of telescopic rods (15) fixedly installed on the inner surface of the fixed base (5), and each telescopic rod (15) has a locking block (8) fixedly connected to its telescopic end.

3. The valve cover structure of a pressure-sealed valve according to claim 2, characterized in that, Each of the slide bars (4) is hinged to a hinge rod (13), and the hinge rod (13) is hinged to the corresponding locking block (8).

4. The valve cover structure of a pressure-sealed valve according to claim 3, characterized in that, Each of the locking blocks (8) has a rubber pad fixedly connected to one side surface, and the rubber pad is in contact with the surface of the valve cover (1).

5. The valve cover structure of a pressure-sealed valve according to claim 1, characterized in that, A threaded rod (16) is threadedly connected to the fixed base (5), and the threaded rod (16) and the annular sleeve (3) are rotatably connected.

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