Venturi structure steam trap capable of adjusting flow on line

Abstract

The utility model provides a venturi structure steam trap capable of adjusting flow on line, which comprises a valve body, a venturi insert and an upper sealing cover, the venturi insert is mounted in the valve body to form a venturi channel, the upper sealing cover is in threaded connection with the valve body, the venturi structure steam trap further comprises a valve seat, a probe and an adjusting valve rod, the valve seat is in threaded connection with the valve body, and the probe is arranged in the valve seat. The probe is in threaded connection with the valve seat, the probe is installed at the expansion position of the Venturi channel and moves in the axial direction of the Venturi channel, the tail of the probe is in lap joint with the adjusting valve rod through a per-unit-shaped groove, and the adjusting valve rod is in threaded connection with the upper sealing cover. According to the Venturi structure steam trap capable of adjusting the flow online, on the basis of the Venturi structure, the online adjusting transmission device, namely the spindle body probe, is additionally arranged, the cross section of a Venturi channel can be manually adjusted online, and therefore the Venturi structure steam trap can adapt to process flow changes caused by deviation from design working conditions.

Description

Technical Field

[0001] This application relates to the field of steam trap technology, specifically a Venturi structure steam trap with online adjustable flow rate. Background Technology

[0002] Venturi-structure steam traps are a new type of steam trap that eliminates air blockage and steam lock while still fulfilling the functions of steam blocking and drainage. Venturi-structure steam traps are designed based on the process conditions of the steam-using equipment or the steam pressure, medium temperature, and condensate production in the steam transmission pipeline. The throat orifice diameter of the steam trap is precisely calculated, and the nozzle structure is rationally designed. Through experimental testing and analysis, the local dimensions and structure of the nozzle are modified to meet the process requirements of different operating conditions. Venturi-structure steam traps have the advantages of low leakage rate, robustness, and durability. They also facilitate the elimination of air blockage and steam lock, continuous condensate drainage, and stable temperature and pressure in the steam system. However, their disadvantages include a narrow flow adjustment range, which may result in insufficient drainage or steam leakage when deviating from the design operating conditions. Summary of the Invention

[0003] To address one of the aforementioned technical deficiencies, this application provides a Venturi structure hydrophobic device with online adjustable flow rate.

[0004] According to a first aspect of the embodiments of this application, an online adjustable venturi structure drain valve is provided, including a valve body, a venturi insert, and an upper sealing cap. The venturi insert is installed inside the valve body to form a venturi channel. The upper sealing cap is threadedly connected to the valve body. The valve valve also includes a valve seat, a probe, and an adjusting valve stem. The valve seat is threadedly connected to the valve body, and the probe is threadedly connected to the valve seat. The probe is installed at the expansion point of the venturi channel and is axially displaced along the venturi channel. The tail of the probe overlaps with the adjusting valve stem through a unibody groove. The adjusting valve stem is threadedly connected to the upper sealing cap.

[0005] Furthermore, the probe is a spindle probe.

[0006] Furthermore, a plug gasket is installed between the venturi plug and the valve body.

[0007] Furthermore, a baffle is installed above the valve seat, and the baffle presses against the valve seat.

[0008] Furthermore, a sealing ring is installed between the regulating valve stem and the upper sealing cover, and a retaining ring is installed on the regulating valve stem, which is engaged with the upper sealing cover.

[0009] Furthermore, a copper gasket is installed between the upper sealing cover and the valve body.

[0010] Furthermore, a filter screen and a filter screen cover are installed on the valve body, and a copper gasket for the filter screen cover is installed between the filter screen and the filter screen cover.

[0011] The Venturi structure condensate drain provided in this application embodiment has an online adjustable flow rate. Based on the Venturi structure, an online adjustment transmission device, namely a spindle probe, is added. This allows for online manual adjustment of the Venturi channel cross-section, thereby adapting to process flow rate changes caused by deviations from the design conditions. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 This is a cross-sectional schematic diagram of a Venturi structure condensate drain with adjustable flow rate provided in an embodiment of this application.

[0014] 1-Valve body; 2-Venturi insert; 3-Valve seat; 4-Insert gasket; 5-Copper gasket; 6-Upper sealing cover; 7-Snap ring; 8-Sealing ring; 9-Adjusting valve stem; 10-Baffle; 11-Probe; 12-Filter cover; 13-Filter cover copper gasket; 14-Filter screen. Detailed Implementation

[0015] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0016] In the process of developing this application, the inventors discovered some performance defects in the Venturi steam trap. The Venturi steam trap is a device used to remove condensate from a steam system. Specifically, its flow regulation capability is poor, meaning it is difficult to accurately adjust the flow rate according to actual needs. When the actual operating parameters deviate significantly from the pre-designed values, two adverse situations occur: one is steam leakage, where steam that should be effectively controlled within the system leaks out, resulting in energy waste; the other is insufficient flow, meaning the steam trap cannot discharge enough condensate as required by the system, affecting the normal operation and efficiency of the entire steam system.

[0017] To address the aforementioned issues, this application provides an online adjustable venturi structure steam trap, comprising a valve body 1, a venturi insert 2, and an upper sealing cap 6. The venturi insert 2 is installed inside the valve body 1 to form a venturi channel. The upper sealing cap 6 is threadedly connected to the valve body 1. The steam trap also includes a valve seat 3, a probe 11, and an adjusting valve stem 9. The valve seat 3 is threadedly connected to the valve body 1, and the probe 11 is threadedly connected to the valve seat 3. The probe 11 is installed at the expansion point of the venturi channel and moves axially along the venturi channel. The tail of the probe 11 overlaps with the adjusting valve stem 9 through a unibody groove. The adjusting valve stem 9 is threadedly connected to the upper sealing cap 6.

[0018] In this embodiment, probe 11 is a spindle probe. If the flow channel size is adjusted using a conical probe like a needle valve, it would disrupt the flow channel of the Venturi structure, affecting the flow field characteristics at the Venturi outlet and causing the Venturi's vapor barrier and drainage performance to fail. Therefore, this application uses a spindle probe, adding a probe that can be displaced along the channel axial direction to adjust the cross-sectional area of ​​the Venturi flow channel based on the Venturi structure. The structure of this probe must be a precisely calculated spindle that can form a new Venturi channel with the original flow channel in cross-section.

[0019] The probe in this application is a spindle of a specific size obtained from simulation calculations based on temperature, pressure, and flow rate.

[0020] In this embodiment, a plug-in gasket 4 is installed between the Venturi plug-in 2 and the valve body 1 to solve the problems of gap, alignment or isolation during assembly, and to improve the stability and life of the Venturi plug-in and the valve body.

[0021] In this embodiment, a baffle plate 10 is installed above the valve seat 3. The baffle plate 10 presses the valve seat 3 to prevent the valve seat 3 from rotating.

[0022] In this embodiment, a sealing ring 8 is installed between the regulating valve stem 9 and the upper sealing cover 6, and a retaining spring 7 is installed on the regulating valve stem 9, which is engaged with the upper sealing cover 6.

[0023] In this embodiment, a copper gasket 5 is installed between the upper sealing cover 6 and the valve body 1 to solve the problems of gap, alignment or isolation during assembly, and to improve the stability and lifespan of the upper sealing cover 6.

[0024] In this embodiment, a filter screen 14 and a filter screen cover 12 are installed on the valve body 1. A filter screen cover copper gasket 13 is installed between the filter screen 14 and the filter screen cover 12 to solve the problems of gap, alignment or isolation during assembly, and improve the stability and life of the filter screen 14 and the filter screen cover 12.

[0025] like Figure 1As shown in this application, liquid flows from A through a filter to B, flashes after passing through the channel of the Venturi insert, and changes the flow rate from B to C by adjusting the regulating valve rod to change the depth of the spindle probe entering the Venturi insert, C to D, and D to E.

[0026] Based on the existing Venturi structure channel, a spindle probe that can be displaced along the channel axis is installed in the outlet expansion section of the Venturi channel. The probe is connected to the base by a thread, and its tail end passes through the base and overlaps with the regulating valve stem through a uniform groove. The regulating valve stem is installed on the top cover of the steam trap and sealed by an O-ring.

[0027] When the process flow rate changes, if the flow rate is less than the design flow rate, the regulating valve stem is adjusted clockwise, and the spindle probe moves axially closer to the throat of the Venturi channel, reducing the cross-sectional area of ​​the Venturi channel and thus decreasing the condensate flow rate. If the flow rate is greater than the design flow rate, the regulating valve stem is adjusted counterclockwise, and the spindle probe moves axially away from the throat of the Venturi channel, increasing the cross-sectional area of ​​the Venturi channel and thus increasing the condensate flow rate.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0032] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A Venturi-structured steam trap with online adjustable flow rate, comprising a valve body, a Venturi insert, and an upper sealing cap, wherein the Venturi insert is installed inside the valve body to form a Venturi channel, and the upper sealing cap is threadedly connected to the valve body, characterized in that, It also includes a valve seat, a probe, and an adjusting valve stem. The valve seat is threadedly connected to the valve body, and the probe is threadedly connected to the valve seat. The probe is installed at the expansion point of the Venturi channel and moves axially along the Venturi channel. The tail of the probe overlaps with the adjusting valve stem through a unibody groove, and the adjusting valve stem is threadedly connected to the upper sealing cover.

2. The Venturi structure condensate drain with online adjustable flow rate according to claim 1, characterized in that, The probe is a spindle probe.

3. The Venturi structure condensate drain with online adjustable flow rate according to claim 2, characterized in that, A plug-in gasket is installed between the venturi plug and the valve body.

4. The Venturi structure condensate drain with online adjustable flow rate according to claim 3, characterized in that, A baffle plate is installed above the valve seat, and the baffle plate presses the valve seat tightly.

5. The Venturi structure condensate drain with online adjustable flow rate according to claim 4, characterized in that, A sealing ring is installed between the regulating valve stem and the upper sealing cover, and a retaining spring is installed on the regulating valve stem, which is engaged with the upper sealing cover.

6. The Venturi structure condensate drain with online adjustable flow rate according to claim 5, characterized in that, A copper gasket is installed between the upper sealing cover and the valve body.

7. The Venturi structure condensate drain with online adjustable flow rate according to claim 6, characterized in that, A filter screen and a filter screen cover are installed on the valve body, and a copper gasket for the filter screen cover is installed between the filter screen and the filter screen cover.

Images