Combined steam inlet valve of steam turbine

Abstract

The utility model discloses a combined steam inlet valve of a steam turbine in the technical field of steam turbines, which comprises a valve body, the top end of a pressure lever is fixedly connected with a valve core, the inner side of an outer base is sleeved and connected with a sealing sleeve, the bottom of the sealing sleeve is abutted against the top end of an outer spring, the inner side of the outer base is elastically clamped with a steel sheet clamping ring, and the steel sheet clamping ring is fixedly connected with the valve core. The steel sheet clamping ring is arranged above the sealing sleeve, through the arrangement of the outer base, the outer spring, the inner base, the inner spring, the pressing rod, the valve element, the sealing sleeve and the steel sheet clamping ring, one end of the steel sheet clamping ring is clamped inwards through pliers, the inner diameter of the steel sheet clamping ring is reduced, and then the steel sheet clamping ring is arranged on the upper surface of the sealing sleeve. And the pliers are loosened to enable the steel sheet clamping ring to rebound in the outer base, so that the clamping effect between the steel sheet clamping ring and the outer base can be achieved, the sealing sleeve is prevented from sliding out of the outer base, and the dustproof effect of the inner cavity of the outer spring is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbines, and in particular relates to a combined steam inlet valve for a steam turbine. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and is then sprayed onto the blades, causing the rotor equipped with the blade rows to rotate and perform external work. The main steam inlet valve and regulating valve of the steam turbine are key components in the inlet area of ​​the steam turbine. The reliability and aerodynamic performance of their structural type are not only related to the performance of the valve itself, but also have an important impact on the safety and efficiency of the steam turbine unit.

[0003] The existing steam turbine combined steam inlet valve is installed in a spring cavity, and the sealing performance is poor. If some dust and impurities enter the spring cavity, the spring is likely to get stuck, resulting in the valve core being unable to open, thereby affecting the use of the device. For this reason, we propose a steam turbine combined steam inlet valve. Utility Model Content

[0004] The utility model aims to provide a steam turbine combined steam inlet valve to solve the problem of poor sealing performance in the spring cavity installed in the existing steam turbine combined steam inlet valve proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a steam turbine combined steam inlet valve, comprising a valve body, an air outlet is provided at the bottom of the valve body, a connecting cover is provided above the valve body, an air inlet is provided at the top of the connecting cover, a fixing nut is provided on the surface of the connecting cover, a sealing gasket is provided on the top of the valve body, an outer base is provided on the inner side of the valve body, an outer spring is provided on the inner side of the outer base, an inner base is provided on the inner side of the outer base, an inner spring is provided on the inner side of the inner base, a pressure rod is provided on the inner side of the inner base, a valve core is provided at the top of the pressure rod, a sealing sleeve is provided on the inner side of the outer base, a steel sheet clamping ring is provided on the inner side of the outer base, a sealing ring is provided at the bottom of the steel sheet clamping ring, a connecting block is provided at the bottom of the valve core, and a support rod is provided on the inner side of the valve body.

[0006] Preferably, the bottom of the valve body is fixedly connected with an air outlet, the top of the connecting cover is fixedly connected with an air inlet, and the connecting cover and the valve body are fixedly connected by a fixing nut.

[0007] Preferably, the sealing gasket is clamped by the valve body and the connecting cover, a support rod is fixedly installed on the inner side of the valve body, and an outer base is fixedly installed on the top of the support rod.

[0008] Preferably, the inner side of the outer base is fixedly connected to the inner side of the inner base, a pressure rod is passed through the inner side of the inner base, and the bottom of the pressure rod abuts against the top of the inner spring.

[0009] Preferably, the top end of the pressure rod is fixedly connected to the valve core, the inner side of the outer base is sleeved with a sealing sleeve, the bottom of the sealing sleeve and the top end of the outer spring are abutted, the inner side of the outer base is elastically clamped with a steel sheet clamping ring, and the steel sheet clamping ring is arranged above the sealing sleeve.

[0010] Preferably, a sealing ring is fixedly connected to the bottom of the steel sheet clamping ring, the bottom of the sealing ring is in contact with the surface of the sealing sleeve, and a connecting block is fixedly installed on the bottom of the valve core.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] Through the outer base, outer spring, inner base, inner spring, pressure rod, valve core, sealing sleeve and steel sheet clamping ring, one end of the steel sheet clamping ring is clamped inwardly with pliers to reduce the inner diameter of the steel sheet clamping ring, and then the steel sheet clamping ring is placed on the upper surface of the sealing sleeve, and the pliers are loosened to allow the steel sheet clamping ring to rebound in the outer base, thereby achieving a clamping effect between the steel sheet clamping ring and the outer base, thereby preventing the sealing sleeve from sliding out from the inside of the outer base and improving the dustproof effect of the inner cavity of the outer spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the connection structure between the connection cover and the valve body of the utility model;

[0016] Figure 4 It is a schematic diagram of the explosion structure of the valve core, outer base and inner base of the utility model.

[0017] In the figure: 1. valve body; 2. air outlet; 3. connecting cover; 4. air inlet; 5. fixing nut; 6. sealing gasket; 7. outer base; 8. outer spring; 9. inner base; 10. inner spring; 11. pressure rod; 12. valve core; 13. sealing sleeve; 14. steel sheet clamp; 15. sealing ring; 16. connecting block; 17. support rod. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides a technical solution: a steam turbine combined steam inlet valve, comprising a valve body 1, an air outlet 2 is provided at the bottom of the valve body 1, a connecting cover 3 is provided above the valve body 1, an air inlet 4 is provided at the top of the connecting cover 3, a fixing nut 5 is provided on the surface of the connecting cover 3, a sealing gasket 6 is provided at the top of the valve body 1, an outer base 7 is provided on the inner side of the valve body 1, an outer spring 8 is provided on the inner side of the outer base 7, an inner base 9 is provided on the inner side of the outer base 7, an inner spring 10 is provided inside the inner base 9, a pressure rod 11 is provided on the inner side of the inner base 9, a valve core 12 is provided at the top of the pressure rod 11, a sealing sleeve 13 is provided on the inner side of the outer base 7, a steel sheet clamping ring 14 is provided on the inner side of the outer base 7, a sealing ring 15 is provided at the bottom of the steel sheet clamping ring 14, a connecting block 16 is provided at the bottom of the valve core 12, and a support rod 17 is provided on the inner side of the valve body 1.

[0020] Specifically, the bottom of the valve body 1 is fixedly connected with the air outlet 2, the top of the connecting cover 3 is fixedly connected with the air inlet 4, the connecting cover 3 and the valve body 1 are fixedly connected by a fixing nut 5, the sealing gasket 6 is clamped by the valve body 1 and the connecting cover 3, the inner side of the valve body 1 is fixedly installed with a support rod 17, the top of the support rod 17 is fixedly installed with an outer base 7, the inner side of the outer base 7 is fixedly connected with an inner base 9, the inner side of the inner base 9 is penetrated with a pressure rod 11, and the bottom of the pressure rod 11 abuts against the inner spring The top of the spring 10 and the top of the pressure rod 11 are fixedly connected with the valve core 12, the inner sleeve of the outer base 7 is connected with a sealing sleeve 13, the bottom of the sealing sleeve 13 and the top of the outer spring 8 are in contact, the inner elastic force of the outer base 7 is clamped with a steel sheet clamping ring 14, the steel sheet clamping ring 14 is arranged above the sealing sleeve 13, the bottom of the steel sheet clamping ring 14 is fixedly connected with a sealing ring 15, the bottom of the sealing ring 15 is in contact with the surface of the sealing sleeve 13, and the bottom of the valve core 12 is fixedly installed with a connecting block 16.

[0021] In this embodiment, the sealing gasket 6 is placed between the connecting cover 3 and the valve body 1, and then the connecting cover 3 and the valve body 1 are connected and fixed by the fixing nut 5. After the air outlet 2 and the air inlet 4 are connected to the external machinery, after the steam flows into the interior of the valve body 1 from the air inlet 4, the valve core 12 will be driven to move downward, so that the top surface of the valve core 12 and the upper surface of the inner cavity of the valve body 1 are separated, and the valve core 12 will drive the pressure rod 11 and the connecting block 16 to compress the inner spring 10 and the outer spring 8, and the steam will enter the air outlet 2 from the inner cavity of the valve body 1, and the steel sheet clamping ring 14 will be pressed. It has a certain elasticity. After the sealing sleeve 13 is installed on the inner side of the outer base 7, one end of the steel sheet clamp 14 is clamped inward with pliers to reduce the inner diameter of the steel sheet clamp 14, and then the steel sheet clamp 14 is placed inside the outer base 7 so that the bottom sealing ring 15 of the steel sheet clamp 14 is in contact with the upper surface of the sealing sleeve 13. Then the pliers are released, and the steel sheet clamp 14 will automatically rebound and contact the inside of the outer base 7, thereby achieving the effect of clamping with the outer base 7, preventing the sealing sleeve 13 from slipping out from the inside of the outer base 7, and improving the dustproof effect of the inner cavity of the outer spring 8.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine combined steam inlet valve, comprising a valve body (1), characterized in that: The bottom of the valve body (1) is provided with an air outlet (2), the top of the valve body (1) is provided with a connecting cover (3), the top of the connecting cover (3) is provided with an air inlet (4), the surface of the connecting cover (3) is provided with a fixing nut (5), the top of the valve body (1) is provided with a sealing gasket (6), the inner side of the valve body (1) is provided with an outer base (7), the inner side of the outer base (7) is provided with an outer spring (8), the inner side of the outer base (7) is provided with an inner base (9), and the inner base (9) is provided with a spring (10). An inner spring (10) is provided inside the inner base (9), a pressure rod (11) is provided on the inner side of the inner base (9), a valve core (12) is provided at the top end of the pressure rod (11), a sealing sleeve (13) is provided on the inner side of the outer base (7), a steel sheet clamping ring (14) is provided on the inner side of the outer base (7), a sealing ring (15) is provided at the bottom of the steel sheet clamping ring (14), a connecting block (16) is provided at the bottom of the valve core (12), and a support rod (17) is provided on the inner side of the valve body (1).

2. A steam turbine combined steam inlet valve according to claim 1, characterized in that: The bottom of the valve body (1) is fixedly connected with an air outlet (2), the top of the connection cover (3) is fixedly connected with an air inlet (4), and the connection cover (3) and the valve body (1) are fixedly connected via a fixing nut (5).

3. The steam turbine combined steam inlet valve according to claim 1, characterized in that: The sealing gasket (6) is clamped by the valve body (1) and the connecting cover (3); a support rod (17) is fixedly mounted on the inner side of the valve body (1); and an outer base (7) is fixedly mounted on the top of the support rod (17).

4. The steam turbine combined steam inlet valve according to claim 1, characterized in that: The inner side of the outer base (7) is fixedly connected to the inner side of the inner base (9), and a pressure rod (11) is passed through the inner side of the inner base (9), and the bottom of the pressure rod (11) abuts against the top of the inner spring (10).

5. The steam turbine combined steam inlet valve according to claim 1, characterized in that: The top end of the pressure rod (11) is fixedly connected to a valve core (12), the inner side of the outer base (7) is sleeved with a sealing sleeve (13), the bottom of the sealing sleeve (13) is in contact with the top end of the outer spring (8), the inner side of the outer base (7) is elastically clamped with a steel sheet clamping ring (14), and the steel sheet clamping ring (14) is arranged above the sealing sleeve (13).

6. The steam turbine combined steam inlet valve according to claim 1, characterized in that: A sealing ring (15) is fixedly connected to the bottom of the steel sheet clamping ring (14), the bottom of the sealing ring (15) is in contact with the surface of the sealing sleeve (13), and a connecting block (16) is fixedly installed on the bottom of the valve core (12).

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