Fluid rectification throttler

Abstract

The utility model discloses a fluid rectification throttler, and aims to solve the problems that a tube bundle type rectifier is not firm in fixing tube bundle structure, a laminated rectifier is tedious to mount and the like. The fluid rectifying throttler comprises a plunger body and a sealing ring, a plurality of arc-shaped or linear slits are formed in the axial direction of the plunger body and are annularly arrayed by taking the central axis of the plunger body as the center, a sealing ring groove is formed in the circumferential direction of the plunger body, the sealing ring is arranged in the sealing ring groove, the fluid rectifying throttler is arranged in a pipeline, and the sealing ring is arranged in the sealing ring groove. The sealing ring is in interference fit with the pipeline to achieve sealing. According to the rectifying throttler, a barrier body structure is adopted, the flow velocity distribution of fluid in a pipeline is changed in a flow channel separation mode, the fluid is changed into a laminar flow state from a turbulent flow state, and the flow state is laminar flow as long as the length of the plunger body is more than 10 times of the width of the slit. According to the requirements of flow resistance, the number and the radial length of the fine seams are determined, and the shapes of the fine seams can be flexibly designed according to the requirements.

Description

Technical Field

[0001] The utility model belongs to the field of fluids, and in particular relates to a rectifier for rectifying and throttling fluids. Background Art

[0002] Existing rectifiers are mainly divided into two structures: tube bundle type and stacked type:

[0003] (1) Tube bundle rectifier

[0004] The tube bundle rectifier forces the fluid to pass through a thin tube bundle (for example, made of 316 stainless steel). The thin tube bundle is used to make the fluid flowing through the thin tubes become laminar flow under the condition of a larger aspect ratio. The flow resistance can be adjusted by selecting different thin tube diameters and the number of thin tubes to achieve a throttling effect, such as Figure 1 shown.

[0005] (2) Laminated rectifier

[0006] The thin grooves processed on the thin metal sheet use the fact that the lateral dimension of the groove is much smaller than the longitudinal dimension of the groove to change the fluid flowing through the groove into a laminar state. By controlling the number of stacked sheets and the size of the flow resistance, the throttling effect is achieved. The fluid can flow from one side or the opposite direction to complete the rectification and throttling effect. An example of the assembly form of a stacked rectifier is as follows Figure 2 shown.

[0007] However, the main disadvantages of the tube bundle rectifier are: the structure is not strong enough; it is difficult to fix the tube bundle; the installation is relatively cumbersome; especially for small sizes, such as stainless steel 316 with a single tube diameter of about φ1 in the tube bundle, and not every material has small-sized tubes, so the material selection is limited.

[0008] The main disadvantages of stacked rectifiers are: cumbersome installation (the number of sheets must be determined, usually dozens of sheets, and some sheets are 0.3mm thick, making alignment and assembly difficult); stacking must be manufactured based on sheets, but not all materials have very thin sheets, so material selection is limited; the fine grooves of a single stack are difficult to process, and the processing process is not environmentally friendly. Utility Model Content

[0009] The utility model aims to provide a fluid rectifier throttle in order to solve the problems that the fixed tube bundle structure of the tube bundle type rectifier is not firm and the installation of the laminated rectifier is complicated.

[0010] The utility model discloses a fluid rectifying throttle device, comprising a plunger body and a sealing ring. A plurality of fine slits are provided along the axial direction of the plunger body, the fine slits are in a straight line (segment) or arc shape, and the plurality of fine slits are arranged in an annular array with the central axis of the plunger body as the center. A sealing ring groove is provided in the circumference of the plunger body, and the sealing ring is arranged in the sealing ring groove. The fluid rectifying throttle device is arranged in a pipeline, and the sealing ring and the pipeline are sealed by interference fit, and the length of the plunger body is 10 to 50 times the width of the fine slit.

[0011] The utility model adopts a barrier structure (plunger body) in the rectifying throttle, and uses a method of separating the flow channel (slit) to change the flow velocity distribution of the fluid in the pipeline, so that the fluid changes from a turbulent state to a laminar state. When the fluid flows through the pipeline, a plunger body is arranged in the pipeline to block the flow of the fluid, so that the fluid can only pass through the slit on the plunger body and flow along the pipeline. As long as the length of the plunger body is more than 10 times the width of the slit, the flow state is laminar. According to the requirements of flow resistance, the number of slits and the length along the radial direction are determined, and the shape of the slits can be flexibly designed according to requirements.

[0012] The utility model fixes the plunger body in the pipeline. For the selection of the plunger body material, this method reduces the requirement on the profile. With the current general process, the fine gap can be easily made into 0.3mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an existing tube bundle rectifier;

[0014] Figure 2 It is a schematic diagram of the assembly form of the existing laminated rectifier;

[0015] Figure 3 is a side view of the plunger body;

[0016] Figure 4 It is a front view schematic diagram of the plunger body;

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the plunger body;

[0018] Figure 6 It is a schematic diagram of a fluid rectifier and throttle arranged in a pipeline. DETAILED DESCRIPTION

[0019] Specific implementation method 1: The fluid rectifier throttle device in this implementation method includes a plunger body 1 and a sealing ring 2. A plurality of fine slits 3 are opened along the axial direction of the plunger body 1. The fine slits 3 are straight lines or arc-shaped. The plurality of fine slits 3 are arranged in a ring array with the central axis of the plunger body 1 as the center. A sealing ring groove is opened in the circumference of the plunger body 1. The sealing ring 2 is arranged in the sealing ring groove. The fluid rectifier throttle device is arranged in a pipeline. The sealing ring 2 and the pipeline are interference fit to achieve sealing. The length of the plunger body 1 is 10 to 50 times the width of the fine slit 3.

[0020] The throttle device in this embodiment rectify and throttle the fluid, so that the fluid flow changes from a turbulent state to a laminar state, and generates flow resistance, so as to detect the flow rate of the fluid. The fluid rectifying throttle device can be used in the fields of petroleum, chemical industry, electric power, metallurgy, environmental protection, energy, pharmaceuticals, food and general industrial measurement.

[0021] Specific implementation method 2: The difference between this implementation method and specific implementation method 1 is that the width of the slit 3 is 0.3-1 mm.

[0022] Specific implementation method three: This implementation method is different from specific implementation methods one or two in that the length of the plunger body 1 is 25 to 35 times the width of the slit 3 .

[0023] In this embodiment, the length of the plunger body 1 is optimized to be 30 times the width of the slit 3, so that the fluid flowing through becomes a laminar flow state. According to the flow requirement, the width and length of the slit and the number of slits are adjusted to determine the flow resistance to produce a throttling effect.

[0024] Specific embodiment 4: This embodiment is different from specific embodiments 1 to 3 in that the number of the slits 3 is 10 to 20.

[0025] Specific embodiment 5: This embodiment is different from specific embodiments 1 to 4 in that the plunger body 1 is made of 316 stainless steel.

[0026] Specific embodiment 6: This embodiment is different from any one of specific embodiments 1 to 5 in that the length of the plunger body 1 is 10 to 20 mm.

[0027] Embodiment: The fluid rectifier throttle of this embodiment includes a plunger body 1 and a sealing ring 2. The diameter of the plunger body 1 is 16 mm, the length of the plunger body 1 is 10 mm to 15 mm, and 12 fine slits 3 are opened along the axial direction of the plunger body 1. The fine slits 3 (along the radial direction of the plunger body) are arc-shaped, and the width of the fine slits 3 is 0.5 mm. The 12 fine slits 3 are arranged in a ring array with the central axis of the plunger body 1 as the center. A sealing ring groove is opened circumferentially in the middle of the plunger body 1, and the width of the sealing ring groove is 2.4 mm. The sealing ring 2 is arranged in the sealing ring groove. The fluid rectifier throttle is arranged in a pipeline, and the sealing ring 2 has an interference fit with the pipeline.

[0028] In this embodiment, the plunger body is pressed from both sides of the pipeline, and the sealing ring seals the gap between the plunger body and the pipeline, so that the gas can only flow through the narrow gap. Figure 3-5 As shown, the assembly diagram of the plunger body and the pipeline is as follows Figure 6 shown.

[0029] The fluid rectifier described in this embodiment adopts a barrier body to change the flow velocity distribution of the fluid in the pipeline by separating the flow channels. Its purpose is to change the fluid from a turbulent state to a laminar state, and use the pressure difference generated by the larger throttling effect to create conditions for flow measurement.

[0030] This embodiment proposes a slit-type rectifier, which makes the fluid flow in a laminar state by cutting slits on the plunger body, and forms flow resistance to produce a throttling effect. It can make the fluid flow in a laminar state when flowing in the pipeline, and adjust the radial length and axial length of the slits and the combination of the number of slits to achieve the purpose of adjusting the flow resistance.

[0031] Compared with the prior art implementation scheme, the fluid rectifier throttle of this embodiment has the following characteristics: (1) strong structure; (2) easy processing and installation; (3) low requirements on material profiles.

[0032] The fluid rectifier throttle of this embodiment is applicable to a variety of different materials, the type of slits, the radial width relative to the plunger body, the axial length, the number of slits, and even other shapes of pipelines, such as square, etc. The corresponding cross-sectional shape of the plunger body must also adapt to the shape of the pipeline interface, and the shape and parameters of the slits can also be adaptively changed.

Claims

1. A fluid rectifier throttle, characterized in that The fluid rectifying throttle comprises a plunger body (1) and a sealing ring (2). A plurality of fine slits (3) are provided along the axial direction of the plunger body (1). The fine slits (3) are in a straight line or arc shape. The plurality of fine slits (3) are arranged in a ring array with the central axis of the plunger body (1) as the center. A sealing ring groove is provided in the circumference of the plunger body (1). The sealing ring (2) is arranged in the sealing ring groove. The fluid rectifying throttle is arranged in a pipeline. The sealing ring (2) and the pipeline are sealed by interference fit. The length of the plunger body (1) is 10 to 50 times the width of the fine slit (3).

2. The fluid rectifier throttle according to claim 1, characterized in that The width of the slit (3) is 0.3-1 mm.

3. The fluid rectifying throttle according to claim 1, characterized in that The length of the plunger body (1) is 25 to 35 times the width of the slit (3).

4. The fluid rectifying throttle according to claim 1, characterized in that The number of the fine slits (3) is 10 to 20.

5. The fluid rectifying throttle according to claim 1, characterized in that The length of the plunger body (1) is 10 to 20 mm.

Images