Adjustable venturi drain valve

Abstract

The utility model aims to solve the technical problem of providing an adjustable venturi drain valve, which can select the on-off of different numbers of venturi channels by an on-off device so as to adapt to the use state that the steam flow is too large or too small, and comprises a valve body, and flange interfaces are respectively arranged at the front end and the rear end of the valve body. The valve body is provided with a plurality of Venturi channels, and each Venturi channel is sequentially divided into a contraction section, a throat pipe section and an expansion section in the flow direction. And an on-off device is arranged in each Venturi channel.

Description

Technical Field

[0001] The utility model relates to the field of steam traps, in particular to an adjustable venturi steam trap. Background Art

[0002] Steam traps are called steam traps, also called automatic drainers or condensate drainers. They are divided into steam system and gas system. Steam traps are installed at the end of the steam-heated pipeline. Their function is to continuously discharge the condensate in the steam-heated pipeline to the outside of the pipeline. Steam traps are widely used in petrochemical, food and pharmaceutical, power plants and other industries, and play a great role in energy conservation and emission reduction.

[0003] With the development of steam traps, Venturi steam traps are now widely used. The structure of Venturi steam traps is relatively simple and consists of several basic components, so it is relatively easy to maintain. In addition, the disassembly of the steam trap is simpler during use, and it can be used immediately after replacement. Under normal use, it can maintain normal operation for a long time. During use, due to the application of automatic control technology, the consumption of service life can be effectively reduced. However, as the equipment is running, the steam flow rate will be too large or too small (this phenomenon is not transient, but lasts for a certain period of time). The Venturi channel is often fixed, and the Venturi parameters are no longer suitable, resulting in the inability to achieve normal steam trapping function. Therefore, it is necessary to stop the machine to replace the steam trap, which brings great inconvenience to production. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an adjustable venturi steam trap, which can select the on and off of different numbers of venturi channels through an on-off device to adapt to the use state of excessively large or too small steam flow.

[0005] The utility model is realized by the following technical solutions:

[0006] An adjustable venturi steam trap comprises a valve body, wherein the front and rear ends of the valve body are respectively provided with flange interfaces, and the valve body is provided with a plurality of venturi channels, and each venturi channel is divided into a contraction section, a throat section and an expansion section in sequence along the flow direction;

[0007] The Venturi channels are all provided with on-off devices.

[0008] Furthermore, the outer side wall of the valve body is provided with a plurality of control shaft holes, each of which corresponds to a throat section connected to the Venturi channel;

[0009] The on-off device is a control rod, which is assembled in the control shaft hole. The inner end of the control rod is provided with a plugging head which can on-off the throat section of the Venturi channel.

[0010] Furthermore, the control shaft hole is perpendicular to the axis of the Venturi channel.

[0011] Furthermore, the control rod is threadedly connected to the control shaft hole, and a rotating handle is provided at the outer end of the control rod.

[0012] Furthermore, the number of the Venturi channels is 4-6.

[0013] Furthermore, the plugging head is hemispherical, and the outer diameter of the plugging head is equal to the inner diameter of the throat section of the Venturi channel.

[0014] Compared with the prior art, the beneficial effects achieved by the utility model are as follows:

[0015] 1. There are multiple Venturi channels on the valve body, each of which is equipped with an on-off device. The on-off device controls the on-off of the Venturi channel. According to the amount of steam, different numbers of Venturi channels are selected to adapt to the use state of excessive or insufficient steam flow, thereby achieving a draining effect, avoiding the need to replace the steam trap in the past, and ensuring stable operation of the equipment;

[0016] 2. The control rod is assembled in the control shaft hole, and the inner end of the control rod is provided with a plugging head capable of opening and closing the throat section of the Venturi channel. With such a design, the operator only needs to realize the opening and closing operation of the Venturi channel from the outside, which is simple to operate and convenient and flexible to use;

[0017] 3. The number of Qiuli channels is 4-6, which is applicable to a wide range of steam volume changes and is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the adjustable Venturi trap described in the utility model;

[0019] Figure 2 for Figure 1 Middle AA schematic diagram;

[0020] Figure 3 This is a schematic diagram of the structure of the Venturi channel of the utility model;

[0021] In the figure: 1. valve body, 2. flange interface, 3. venturi channel, 31. contraction section, 32. throat section, 33. expansion section, 4. control rod, 5. plugging head, 6. rotating handle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] like Figure 1-3 As shown, this embodiment discloses an adjustable venturi steam trap, including a cylindrical valve body 1, and flange interfaces 2 are respectively processed and connected at the front and rear ends of the valve body 1, and other equipment can be conveniently connected through the flange interfaces 2. Four venturi channels 3 are processed on the valve body 1, and each venturi channel 3 is divided into a contraction section 31, a throat section 32 and an expansion section 33 along the flow direction, and each venturi channel 3 is correspondingly configured with a switching device that can switch its flow.

[0025] Four control shaft holes are evenly processed on the outer circumferential side wall of the valve body 1, and each control shaft hole corresponds to the throat section connected to the Venturi channel 3. When processing the control shaft hole, ensure that the control shaft hole is perpendicular to the axis of the Venturi channel 3. The on-off device is a control rod 4, which is assembled in the control shaft hole and threadedly connected to the control shaft hole. A plugging head 5 that can open and close the throat section of the Venturi channel 3 is provided at the inner end of the control rod 4. When the control rod 4 is screwed in, the plugging head 5 can enter the throat section of the Venturi channel 3 to block it.

[0026] In order to facilitate the operation of rotation, a rotating handle 6 is provided at the outer end of the control rod 4. In order to ensure the blocking effect, the blocking head 5 is hemispherical, and the outer diameter of the blocking head 5 is equal to the inner diameter of the throat section of the venturi channel 3.

[0027] The specific working process of the adjustable Venturi trap described in the utility model is as follows:

[0028] During normal operation, only two Venturi channels 3 need to be kept in a connected state, and the other two Venturi channels 3 are in a cut-off state. When the steam volume increases, 1-2 Venturi channels 3 need to be opened to meet the hydrophobic performance. When the steam volume decreases, one Venturi channel 3 needs to be closed to meet the hydrophobic performance. The utility model selects different numbers of Venturi channels 3 according to the amount of steam to adapt to the use state of excessive or insufficient steam flow, thereby achieving a hydrophobic effect, avoiding the previous method of replacing the steam trap, and ensuring stable operation of the equipment.

Claims

1. An adjustable venturi steam trap, comprising a valve body, wherein the front and rear ends of the valve body are respectively provided with flange interfaces, characterized in that: The valve body is provided with a plurality of Venturi channels, each of which is divided into a contraction section, a throat section and an expansion section in sequence along the flow direction; The Venturi channels are all provided with on-off devices.

2. The adjustable venturi trap according to claim 1, characterized in that: The outer side wall of the valve body is provided with a plurality of control shaft holes, each of which corresponds to a throat section connected to the Venturi channel; The on-off device is a control rod, which is assembled in the control shaft hole. The inner end of the control rod is provided with a plugging head which can on-off the throat section of the Venturi channel.

3. The adjustable venturi trap according to claim 2, characterized in that: The control shaft hole is perpendicular to the axis of the Venturi channel.

4. The adjustable venturi trap according to claim 2, characterized in that: The control rod is threadably connected to the control shaft hole, and a rotating handle is provided at the outer end of the control rod.

5. The adjustable venturi trap according to any one of claims 1 to 4, characterized in that: The number of the Venturi channels is 4-6.

6. The adjustable venturi trap according to any one of claims 2 to 4, characterized in that: The plugging head is hemispherical, and the outer diameter of the plugging head is equal to the inner diameter of the throat section of the Venturi channel.

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