High pressure live seat thermodynamic steam trap

Abstract

This utility model relates to the field of steam trap technology, specifically a high-pressure valve seat thermodynamic steam trap, comprising a valve body and a valve cover. The valve body has an inlet and an outlet, and a cavity is provided between the valve body and the valve cover. A valve seat is disposed within the cavity, and a supporting step is provided on the valve seat. A pressing step is provided on the valve cover, and the pressing step presses against the supporting step. A valve plate is disposed above the valve seat. An inlet flow channel and an outlet flow channel are provided within the valve seat, with the inlet flow channel connecting to the inlet and the outlet flow channel connecting to the outlet. In this utility model, the valve body and valve seat are independent of each other. The valve seat is fixed to the valve body by a sealing gasket. During maintenance, it is not necessary to disassemble the steam trap from the pipeline; only the connecting bolts between the valve cover and the valve body need to be loosened to remove the valve seat and valve plate for inspection or direct replacement of new parts. This simplifies the maintenance process, shortens maintenance time, and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of steam trap technology, and specifically to a high-pressure live valve seat thermodynamic steam trap. Background Technology

[0002] Steam traps, also known as automatic drainers or condensate drainers, are widely used in steam and gas systems, especially at the ends of steam-heated pipelines, to continuously drain condensate from the pipes to the outside. Traditional thermodynamic steam traps typically have their seats machined directly onto the valve body. Under high-temperature and high-pressure conditions, the seat material must possess high hardness, good temperature and dimensional stability, and excellent corrosion and wear resistance. This places extremely high demands on the casting process and material selection of the valve body, resulting in complex heat treatment processes and high product costs. Furthermore, these steam traps have a relatively short service life, often requiring complete replacement during maintenance, further increasing maintenance costs. Utility Model Content

[0003] This invention provides a high-pressure live valve seat thermodynamic steam trap to solve the problems of the prior art.

[0004] The objective of this utility model can be achieved through the following technical solution: A high-pressure valve seat thermodynamic steam trap includes a valve body and a valve cover. The valve body is provided with an inlet and an outlet. A cavity is provided between the valve body and the valve cover. A valve seat is provided in the cavity. A supporting step is provided on the valve seat. A pressing step is provided on the valve cover. The pressing step presses against the supporting step. A valve plate is provided above the valve seat. An inlet flow channel and an outlet flow channel are opened in the valve seat. The inlet flow channel is connected to the inlet, and the outlet flow channel is connected to the outlet.

[0005] In a further improvement, a sealing gasket is provided between the valve seat and the valve body. The sealing gasket includes an inner sealing ring and an outer sealing ring. A water inlet is provided in the middle of the inner sealing ring. The water inlet is corresponding to the inlet flow channel. A drain outlet is formed between the inner sealing ring and the outer sealing ring and connected by a crossbar. The drain outlet is corresponding to the outlet flow channel.

[0006] In a further improvement, a filter cavity is provided between the inlet and the outlet, and a filter screen is provided inside the filter cavity with a plug at the lower end.

[0007] In a further improvement, the bottom of the valve cover abuts against the upper end face of the outer sealing ring.

[0008] In a further improvement, a positioning groove is provided between the inner sealing ring and the outer sealing ring, and a positioning sleeve is embedded in the positioning groove. The lower end of the positioning sleeve is limited by a sealing gasket provided in the valve body.

[0009] In a further improvement, the outlet flow channel is provided with multiple channels, and a flow chamber groove is formed above the valve seat, the flow chamber groove being connected to all the outlet flow channels.

[0010] In a further improvement, the sealing gasket comprises an inner stamped 304 stainless steel sheet and an outer flexible graphite layer.

[0011] As a further improvement, the valve seat is made of 9Cr18Mo high-carbon chromium martensitic stainless steel.

[0012] As a further improvement, the valve body and valve cover are made of WC9 cast steel.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The valve body and valve seat of this utility model are independent of each other. The valve seat is fixed to the valve body by a sealing gasket. During maintenance, there is no need to remove the drain valve from the pipeline. Only the connecting bolts between the valve cover and the valve body need to be loosened to remove the valve seat and valve plate for inspection or direct replacement of new parts. This simplifies the maintenance process, shortens the maintenance time, reduces the maintenance cost, ensures the efficient repair and stable operation of the drain system, and significantly reduces maintenance costs. 2. The valve body and the valve seat of this utility model are independent of each other. The valve seat can be made of a more suitable material according to the working conditions of high temperature and high pressure steam, and can be heat treated separately, which simplifies the process flow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the sealing gasket of this utility model.

[0015] In the diagram, 1. Valve body; 11. Inlet; 12. Outlet; 2. Valve cover; 21. Pressing step; 3. Cavity; 31. Flow chamber groove; 4. Valve seat; 41. Support step; 42. Inlet flow channel; 43. Outlet flow channel; 5. Sealing gasket; 51. Inner sealing ring; 511. Water inlet; 512. Positioning groove; 52. Outer sealing ring; 521. Drain outlet; 6. Filter cavity; 61. Filter screen; 62. Plug; 7. Positioning sleeve; 8. Spiral wound gasket; 9. Valve plate. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The following is a description of the embodiments and appendices. Figures 1-2 The technical solution of this utility model will be further described below.

[0019] Example 1 A high-pressure valve seat thermodynamic steam trap includes: a valve body 1 and a valve cover 2. The valve body 1 is provided with an inlet 11 and an outlet 12. A cavity 3 is provided between the valve body 1 and the valve cover 2. A valve seat 4 is provided in the cavity 3. A supporting step 41 is provided on the valve seat 4. A pressing step 21 is provided on the valve cover 2. The pressing step 21 presses against the supporting step 41. A valve plate 5 is provided above the valve seat 4. An inlet flow channel 42 and an outlet flow channel 43 are opened in the valve seat 4. The inlet flow channel 42 is connected to the inlet 11, and the outlet flow channel 43 is connected to the outlet 12.

[0020] like Figure 1 As shown, the valve body 1 and the valve seat 3 of this utility model are independent of each other. The valve seat 3 is fixed to the valve body 1 by the sealing gasket 5. During maintenance, it is not necessary to disassemble the steam trap from the pipeline. Only the connecting bolts between the valve cover 2 and the valve body 1 need to be loosened to remove the valve seat 3 and valve plate 9 for inspection or direct replacement of new parts. This simplifies the maintenance process, shortens the maintenance time, reduces the maintenance cost, ensures the efficient repair and stable operation of the steam trap system, and significantly reduces maintenance costs. The valve body 1 and the valve seat 3 are independent of each other. The valve seat 3 can be made of a more suitable material according to the working conditions of high temperature and high pressure steam, and can be heat treated separately, which simplifies the process.

[0021] In a further improvement, a sealing gasket 5 is provided between the valve seat 3 and the valve body 1. The sealing gasket 5 includes an inner sealing ring 51 and an outer sealing ring 52. An inlet 511 is provided in the middle of the inner sealing ring 51. The inlet 511 is correspondingly provided with the inlet flow channel 42. A drain outlet 521 is formed between the inner sealing ring 51 and the outer sealing ring 52 and is connected by a crossbar. The drain outlet 521 is correspondingly provided with the outlet flow channel 43.

[0022] For details, please refer to Figure 2 The sealing gasket 5 mainly serves to seal, preventing the valve seat 3 and valve body 7 from having gaps for steam or water. The inner sealing ring 51 has a water inlet 51 in the middle that corresponds to the inlet channel 42, which is used to guide condensate into the water. The inner sealing ring 51 and the outer sealing ring 52 form a drain outlet 521 and are connected by a crossbar. The drain outlet 521 is corresponding to the outlet channel 43 and is used to guide the discharged condensate to the outlet channel 43.

[0023] As a further preferred embodiment, a filter cavity 6 is provided between the inlet 11 and the outlet 12, and a filter screen 61 is provided in the filter cavity 6 and a plug 62 is provided at the lower end.

[0024] Specifically, a filter screen 61 is provided inside the filter cavity 6 to filter impurities in the incoming condensate and steam, ensuring the cleanliness of the fluid entering the cavity 3. A plug 62 is provided at the lower end of the filter screen 61 to facilitate the cleaning and maintenance of the filter cavity 6 and ensure the filtration effect.

[0025] As a further preferred embodiment, a spiral wound gasket 8 is provided between the plug 62 and the valve body 1, thereby improving the overall sealing performance of the equipment.

[0026] As a further preferred embodiment, the bottom of the valve cover 2 abuts against the upper end face of the outer sealing ring 52.

[0027] A positioning groove 512 is provided between the inner sealing ring 51 and the outer sealing ring 52. A positioning sleeve 7 is embedded in the positioning groove 512. The lower end of the positioning sleeve 7 is limited by the sealing gasket 5 provided in the valve body 1.

[0028] Specifically, the positioning sleeve 4 passes through the sealing gasket 5 and connects to the valve body 7, which can prevent the sealing gasket 5 from rotating on the valve body 7 and ensure the smooth flow of the water outlet.

[0029] Multiple outlet flow channels 43 are provided, and a flow chamber groove 31 is formed above the valve seat 3. The flow chamber groove 31 is connected to all the outlet flow channels 43.

[0030] As a further preferred embodiment, the sealing gasket includes an inner stamped 304 stainless steel sheet and an outer flexible graphite layer.

[0031] As a further preferred embodiment, the valve seat is made of 9Cr18Mo high-carbon chromium martensitic stainless steel.

[0032] As a further preferred embodiment, the valve body and valve cover are made of WC9 cast steel.

[0033] Specifically, in this embodiment, the preferred material of the valve seat 3 is 9Cr18Mo high-carbon chromium martensitic stainless steel, which has high hardness and wear resistance, high dimensional stability at high and low temperatures and good corrosion resistance after quenching; the valve plate 2 is made of 2Cr13 material which has high hardness and wear resistance after heat treatment, and a water collection groove is machined on the valve plate 2, which is installed between the valve cover 1 and the valve body 7.

[0034] The usage process of this utility model is as follows: When the equipment is started, the inlet pressure pushes the condensate and air through the filter screen 6 inside the valve body 1, then flows through the central hole of the valve body 1, through the sealing gasket 5 and the valve seat 3, pushes up the valve plate 9, and finally is quickly discharged from the outlet channel and outlet. As high-temperature condensate enters, flash steam is generated, which increases static pressure and reduces power, thereby pulling valve plate 9 towards the valve seat; At the same time, high-temperature condensate enters above valve plate 9 for secondary flash evaporation, applying downward pressure to valve plate 9, forcing it to close and preventing steam from flowing out; As the amount of condensate from the secondary steam increases, the steam trap restarts its cycle.

[0035] The valve cover 2 of this utility model does not require a separate soft seal between the valve cover 2 and the valve seat. It is directly assembled and sealed with the valve body 1 to ensure the consistency of the back pressure chamber volume during mass production. The sheet graphite gasket facilitates the control of bolt preload and product opening and closing frequency consistency.

[0036] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A high pressure, thermostatic, steam trap valve, comprising: A valve body and a valve cover, wherein the valve body is provided with an inlet and an outlet, characterized in that a cavity is provided between the valve body and the valve cover, a valve seat is provided in the cavity, a supporting step is provided on the valve seat, a pressing step is provided on the valve cover, the pressing step is pressed against the supporting step, a valve plate is provided above the valve seat, and an inlet flow channel and an outlet flow channel are opened in the valve seat, the inlet flow channel is connected to the inlet, and the outlet flow channel is connected to the outlet.

2. A high pressure thermostatic steam trap valve according to claim 1, wherein, A sealing gasket is provided between the valve seat and the valve body. The sealing gasket includes an inner sealing ring and an outer sealing ring. A water inlet is provided in the middle of the inner sealing ring. The water inlet is corresponding to the inlet flow channel. A drain outlet is formed between the inner sealing ring and the outer sealing ring and connected by a crossbar. The drain outlet is corresponding to the outlet flow channel.

3. A high pressure thermostatic steam trap valve according to claim 1, wherein, A filter cavity is provided between the inlet and the outlet, and a filter screen is provided inside the filter cavity with a plug at the lower end.

4. A high pressure thermostatic steam trap valve according to claim 3, wherein, A spiral wound gasket is provided between the plug and the valve body.

5. A high pressure thermostatic steam trap valve according to claim 2, wherein, The bottom of the valve cover abuts against the upper end face of the outer sealing ring.

6. A high pressure thermostatic steam trap valve according to claim 2, wherein, A positioning groove is provided between the inner sealing ring and the outer sealing ring, and a positioning sleeve is embedded in the positioning groove. The lower end of the positioning sleeve is limited by a sealing gasket provided in the valve body.

7. A high pressure thermostatic steam trap valve according to claim 1, wherein, The outlet flow channel is provided with multiple channels, and a flow chamber groove is formed above the valve seat. The flow chamber groove is connected to all the outlet flow channels.

8. A high-pressure valve seat thermodynamic steam trap according to claim 2, characterized in that, The sealing gasket comprises an inner stamped 304 stainless steel sheet and an outer flexible graphite layer.

9. A high-pressure valve seat thermodynamic steam trap according to claim 1, characterized in that, The valve seat is made of 9Cr18Mo high-carbon chromium martensitic stainless steel.

10. A high-pressure valve seat thermodynamic steam trap according to claim 1, characterized in that, The valve body and valve cover are made of WC9 cast steel.

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