A valve seat clamping structure for a detachable valve seat regulating valve

Abstract

This utility model relates to a valve seat clamping structure for a detachable valve seat regulating valve, belonging to the field of valves used in thermal power plants. This utility model provides a valve seat clamping structure for a detachable valve seat regulating valve with a dedicated valve seat clamping screw. The technical solution is as follows: Multiple threaded holes are drilled in the valve seat cover, and a dedicated clamping screw is fabricated. First, the dedicated clamping screw is connected to the valve seat cover through the threaded holes and tightened. After tightening, the dedicated clamping screw extends upwards through the valve seat cover plane. The outer wall of the valve seat cover has threads. The valve seat cover with the dedicated clamping screw connected is then connected to the valve body assembly and tightened through a threaded connection. At this point, the dedicated clamping screw is tightened again. One end of the dedicated clamping screw can press against the valve seat, thereby clamping the valve seat metal spiral wound gasket and achieving the sealing requirement.

Description

Technical Field

[0001] This utility model relates to a valve seat clamping structure for a detachable valve seat regulating valve, which belongs to the field of valves used in thermal power plants. Background Technology

[0002] The function of a regulating valve is to reduce the relatively high pressure of primary steam to the required low-pressure secondary steam. It is widely used in thermal power, petrochemical, light industry, and textile enterprises to achieve tiered utilization of steam, and is also widely used in various boiler systems. In different boiler systems, regulating valves play different roles: some meet the steam demand of the boiler unit, some meet the process requirements of boiler exhaust, and some protect the entire boiler system. Therefore, regulating valves play a crucial role in steam turbine systems, but their installation should meet both rationality and necessity, achieving energy saving, rationality, and ensuring the safety and reliability of the unit.

[0003] The invention addresses the increasing demands for efficient operation and maintenance of power units, requiring control valves to be easily and quickly repaired, with repair time not exceeding 2-3 days. Valves are also required to have longer service lives, simple structures, small size, light weight, low cost, and more stable operation. The existing clamping structure of detachable seat control valves is difficult to operate, and loosening is common after clamping with specialized tooling, increasing the frequency of after-sales maintenance. Furthermore, re-clamping during maintenance is time-consuming and labor-intensive, resulting in very low maintenance efficiency, and no longer meets the current market requirements for maintenance time and efficiency. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this utility model provides a valve seat clamping structure for a detachable valve seat regulating valve with a dedicated valve seat clamping screw.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: including: valve body assembly (1), special clamping screw (2), valve seat cover (3), valve seat (4), and metal spiral wound gasket; the valve seat cover has a threaded hole drilled at the end to connect with the special clamping screw, and the outer wall of the valve seat cover has threads, which are connected to the valve body by threads, making it convenient to disassemble and reassemble during assembly and maintenance; one end of the special clamping screw is a countersunk hexagonal structure, and the other end is a hexagonal bolt structure, both ends of which can rotate, making it convenient to assemble and clamp the valve seat metal spiral wound gasket to achieve sealing. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of a control valve with a detachable valve seat.

[0007] Figure 2 This is a partially enlarged schematic diagram of the valve seat clamping structure of a detachable valve seat regulating valve;

[0008] Figure 3This is a schematic diagram of a special clamping screw for a valve seat clamping structure;

[0009] Figure 4 This is a schematic diagram of the valve seat pressing structure valve seat cover;

[0010] Reference numerals: 1. Valve body assembly, 2. Special clamping screw, 3. Valve seat gland, 4. Valve seat, 5. Metal spiral wound gasket. Detailed Implementation

[0011] A valve seat clamping structure for a regulating valve with a detachable valve seat achieves sealing by clamping a metal spiral wound gasket at the valve seat. First, a dedicated clamping screw 2 is connected to the valve seat cover 3 via a threaded hole and tightened. After tightening, the dedicated clamping screw 2 extends upwards through the valve seat cover plane. The outer wall of the valve seat cover 3 has threads. The valve seat cover 3, with the dedicated clamping screw 2 connected, is then connected to the valve body assembly 1 via a threaded connection and tightened. At this point, the dedicated clamping screw 2 is tightened again, allowing one end of the dedicated clamping screw to press against the valve seat, thereby clamping the metal spiral wound gasket at the valve seat and achieving the sealing requirement.

[0012] The advantages of this invention are twofold: firstly, it allows for quick disassembly and installation during maintenance, requiring only the tightening of screws, thus saving significant maintenance time; secondly, it provides a more reliable compression seal, reducing the frequency of maintenance.

[0013] exist Figure 3 In the embodiment shown, the special clamping screw is characterized by a countersunk hexagonal head on one end and a hexagonal bolt on the other, which allows the screw to rotate from both sides.

[0014] exist Figure 4 In the embodiment shown, the valve seat cover is provided with multiple threaded holes, which can be connected and cooperated with a special clamping screw to clamp the valve seat.

Claims

1. A valve seat pressing structure of a removable valve seat regulating valve, characterized by, include: Valve body assembly (1), special clamping screw (2), valve seat cover (3), valve seat (4), metal spiral wound gasket; the valve seat cover has a threaded hole drilled at the end to connect with the special clamping screw, and the outer wall of the valve seat cover has threads, which are connected to the valve body by threads, making it convenient to disassemble and reassemble during assembly and maintenance; one end of the special clamping screw is a countersunk hexagonal structure, and the other end is a hexagonal bolt structure, both ends of which can rotate, making it convenient to assemble and clamp the valve seat metal spiral wound gasket to achieve sealing.

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