A parameter design method for a horizontal multi-layer noise reduction regulating valve

Abstract

The present invention discloses a horizontal multi-layer noise reduction regulating valve and a parameter design method thereof, which relates to the field of valve technology. On the one hand, a horizontal multi-layer noise reduction regulating valve is provided, comprising a regulating mechanism and a ball valve. The regulating mechanism comprises at least one noise reduction plate, with two adjacent noise reduction plates arranged horizontally at intervals; the ball valve is arranged in the flow passage of the regulating mechanism and is connected in series with the regulating mechanism; on the other hand, a parameter design method of the horizontal multi-layer noise reduction regulating valve is provided, comprising determining the pressure reduction value required by the regulating mechanism based on the pressure reduction value required by the system pipeline and the designed pressure reduction value of the ball valve; determining the number of noise reduction plates based on the pressure reduction value required by the regulating mechanism; determining the pressure in front of and behind each noise reduction plate after flow restriction based on the number of noise reduction plates; and determining the number of holes and the aperture of the through-holes in each noise reduction plate based on the pressure in front of and behind each noise reduction plate. The method solves the problems of limited noise reduction effect of single-stage throttling, vertical space occupation by multi-stage throttling, and cumbersome operation of multiple valves.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a parameter design method for a horizontal multi-layer noise reduction regulating valve. Background Art

[0002] Ball valves are widely used in long-distance pipelines, power generation, water conservancy, and other industries, and they play a vital role in the national economy. Ball valves are primarily used in pipelines to cut off, distribute, and redirect the flow of media. They require only a 90-degree rotation and minimal torque to achieve a tight closure. While most suitable for on-off and shut-off valves, they have been increasingly used for regulating applications in recent years. Traditional multi-stage throttling valves typically have each stage arranged vertically. When space is limited, multiple valves can be arranged in a row, which can be cumbersome and difficult to operate.

[0003] At the same time, as the liquid medium in the pipeline flows through the valve's throttling section, the flow velocity increases and the static pressure decreases. When the static pressure from the throttling section to the valve outlet drops to or below the medium's saturated vapor pressure at the valve inlet temperature, some of the liquid vaporizes into gas, creating a flash vaporization phenomenon. This generates a large number of bubbles within the valve cavity. If the pressure after the valve does not remain below the saturated vapor pressure but instead rises suddenly after the throttling section, the flash vaporization bubbles will rupture under pressure and return to a liquid state, causing cavitation. During cavitation, the flash vaporization bubbles burst one after another. All the energy generated by the bursting bubbles is concentrated at the rupture point, generating a tremendous impact force. If the rupture point is close to the valve or pipe wall, the impact force can erode numerous small holes in the material surface, which gradually expand into cavities and eventually tear the surface, causing "cavitation" of the fluid. Cavitation can pose significant risks in industrial process control systems.

[0004] Among the existing solutions to the above problems, most use multi-stage multi-stage pressure-reducing regulating valves or labyrinth sleeve regulating valves to deal with them. However, due to the structural characteristics of straight-stroke valves, they still have disadvantages such as small flow capacity, large flow resistance, and bulky size, which greatly restrict the application scope of the products. Summary of the Invention

[0005] In response to the defects existing in the prior art, the purpose of the present invention is to provide a parameter design method for a horizontal multi-layer noise reduction regulating valve to solve the problems in the prior art such as limited noise reduction effect of single-stage throttling, vertical space occupation by multi-stage throttling, and cumbersome operation of continuous arrangement of multiple valves.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] In one aspect, a horizontal multi-layer noise reduction regulating valve is provided, comprising:

[0008] The regulating mechanism comprises at least one noise reduction plate, each of which is provided with at least one through hole for fluid to pass through, and two adjacent noise reduction plates are arranged horizontally at intervals;

[0009] The ball valve is arranged in the flow passage of the regulating mechanism and is connected in series with the regulating mechanism.

[0010] On the other hand, a parameter design method for a horizontal multi-layer noise reduction regulating valve is also provided, which is used to design the above-mentioned horizontal multi-layer noise reduction regulating valve, comprising the following steps:

[0011] Determine the pressure reduction value that the regulating mechanism needs to bear based on the pressure reduction value required by the system pipeline and the designed pressure reduction value of the ball valve;

[0012] Determine the number of noise reduction plates based on the pressure reduction value that the above-mentioned adjustment mechanism needs to bear;

[0013] According to the number of the above-mentioned noise reduction plates, the pressure in front of and behind each noise reduction plate after flow limiting is determined;

[0014] The number of through holes on each noise reduction board and the aperture of the through holes are determined according to the pressure in front of and behind each noise reduction board.

[0015] In some optional solutions, when determining the number of noise reduction plates based on the pressure reduction value required by the above-mentioned adjustment mechanism:

[0016] If the noise reduction plate passes through gas or steam, then when the pressure behind each noise reduction plate is greater than or equal to 55% of the pressure in front of the plate, use one noise reduction plate; when the pressure behind each noise reduction plate is less than 55% of the pressure in front of the plate, use multiple noise reduction plates, and the number of plates should be such that the pressure behind each of the above noise reduction plates is greater than 55% of the pressure in front of the plate;

[0017] If the liquid passes through the noise reduction plate, when the liquid pressure drop is less than or equal to 2.5 MPa, one noise reduction plate is used; when the liquid pressure drop is greater than 2.5 MPa, multiple noise reduction plates are used, and the pressure drop of each noise reduction plate is less than 2.5 MPa.

[0018] In some optional solutions, when the gas or steam passes through the noise reduction plate, and there are at least two noise reduction plates:

[0019] The number of the above noise reduction panels is based on Determine, where n is the total number of blocks, is the pressure in front of the first noise reduction panel, It is the pressure behind the last noise reduction panel.

[0020] In some optional solutions, the aperture of a single through hole on each noise reduction board is determined based on the pressure in front of and behind each noise reduction board after flow limiting, including:

[0021] according to , determine the aperture of the noise reduction plate ;

[0022] in, is the aperture of the noise reduction plate, W is the weight flow rate of the fluid, C is the flow coefficient of the noise reduction plate, is the front pressure of the noise reduction board, is the pressure behind the noise reduction plate, M is the molecular weight, and Z is the compression coefficient. Comparison of temperature It can be obtained by consulting the gas compressibility coefficient diagram, where T is the fluid temperature in front of the noise reduction plate and K is the adiabatic index.

[0023] In some optional solutions, the above-mentioned , determine the aperture of a single through hole in the noise reduction board ,include:

[0024] Preset C value to solve ;

[0025] according to The ratio of C and The C value is reviewed based on the relationship table. If the review is incorrect, the C value is reset until it is correct.

[0026] In some optional solutions, when liquid passes through the noise reduction plate and there are at least two noise reduction plates, determining the number of noise reduction plates includes:

[0027] according to , calculate the total number of blocks n.

[0028] In some optional solutions, the above-mentioned determination of the aperture of a single through hole of each noise reduction plate based on the front-back pressure of each noise reduction plate includes:

[0029] according to , determine the aperture of a single through hole on each noise reduction board , where Q is the volume flow rate under working condition, C is the flow coefficient of the noise reduction plate, is the pressure drop across the noise reduction plate, is the relative density under working conditions.

[0030] In some optional solutions, when there are multiple through holes on the noise reduction board:

[0031] according to , determine the total number N of through holes on each noise reduction board, where d is the preset aperture of each of the above through holes.

[0032] In some optional solutions, the method of determining the front-to-rear pressure of each noise reduction plate after flow limiting based on the number of noise reduction plates includes:

[0033] according to , determine the pressure behind the mth noise reduction plate , and thereby determine the pressure in front of and behind each noise reduction plate after flow limiting.

[0034] Compared with the existing technology, the advantages of the present invention are: by providing a horizontal multi-layer noise reduction regulating valve, it solves the problems in the existing technology of limited noise reduction effect of single-stage throttling, vertical space occupation of multi-stage throttling, and cumbersome operation of continuous arrangement of multiple valves; by determining the pressure reduction value required by the system pipeline and the designed pressure reduction value of the ball valve, the pressure reduction value required by the regulating mechanism is determined, so that it can be flexibly designed according to the needs of different scenarios; by increasing or decreasing the number of noise reduction plates, changing the size and number of through holes on the noise reduction plates, and changing the arrangement of the through holes, the pressure and flow of the fluid can be flexibly adjusted, so that the pressure distribution of the fluid in the flow channel is more uniform, thereby achieving the purpose of reducing flow-induced vibration and reducing valve throttling noise. It not only has the advantages of simple structure, easy processing, low manufacturing cost and convenient installation, but also can be flexibly designed according to different needs and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a structural schematic diagram of a horizontal multi-layer noise reduction regulating valve according to the present invention;

[0037] Figure 2 This is a flow chart of a parameter design method for a horizontal multi-layer noise reduction regulating valve according to the present invention.

[0038] In the figure: 1. Adjustment mechanism; 11. Noise reduction plate; 111. Through hole; 2. Ball valve. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0041] like Figure 1 As shown, the present application provides a horizontal multi-layer noise reduction regulating valve, including a regulating mechanism 1 and a ball valve 2. The regulating mechanism 1 includes at least one noise reduction plate 11, each noise reduction plate 11 is provided with at least one through hole 111 for fluid to pass through, and two adjacent noise reduction plates 11 are arranged horizontally at intervals; the ball valve 2 is arranged in the flow channel of the regulating mechanism 1 and is connected in series with the regulating mechanism 1.

[0042] It can be understood that the ball valve 2 is disposed within the flow passage of the regulating mechanism 1, and the fluid flows out from the inlet of the flow passage of the regulating mechanism 1 through the regulating mechanism 1 and the ball valve 2. The multi-stage pressure reduction and noise reduction process of the regulating mechanism 1 and the ball valve 2 not only reduces the pressure drop of the fluid but also has a flow-limiting effect on the fluid.

[0043] At the same time, using the noise reduction plate 11 as the pressure-reducing and noise-reducing element of the adjustment mechanism 1 not only has the advantages of simple structure, easy processing, low manufacturing cost and convenient installation, but also uses the noise reduction plate 11 to limit the flow rate of the fluid, reduce the fluid pressure drop, and reduce the fluid circulation noise. The required adjustment range and adjustment effect can be achieved by flexibly increasing or decreasing the size and number of the noise reduction plate 11 and the through holes 111 on the noise reduction plate 11.

[0044] Therefore, if Figure 2 As shown, the present application also provides a parameter design method for a horizontal multi-layer noise reduction ball valve, which is used to design the above-mentioned horizontal multi-layer noise reduction ball valve, comprising the following steps:

[0045] The pressure reduction value that the regulating mechanism 1 needs to bear is determined based on the pressure reduction value required by the system pipeline and the designed pressure reduction value of the ball valve 2.

[0046] It can be understood that since the pressure reduction value of the ball valve 2 is a fixed value determined according to the design requirements of the ball valve 2, the pressure reduction value required by the regulating mechanism 1 can be obtained by subtracting the design pressure reduction value of the ball valve 2 from the pressure reduction value required by the system pipeline.

[0047] It should be noted that when determining the pressure reduction value that the regulating valve 1 needs to bear, a specific analysis should be conducted based on the type of fluid passing through the regulating mechanism 1.

[0048] For example, if gas or steam passes through the noise reduction plate 11, then when the pressure behind each noise reduction plate 11 is greater than 55% of the pressure in front of the plate, one noise reduction plate 11 is used; when the pressure behind each noise reduction plate 11 is less than 55% of the pressure in front of the plate, multiple noise reduction plates 11 are used; if liquid passes through the noise reduction plate 11, then when the pressure drop of the liquid is less than or equal to 2.5 MPa, one noise reduction plate 11 is used; when the pressure drop of the liquid is greater than 2.5 MPa, multiple noise reduction plates 11 are used, and the pressure drop of each noise reduction plate 11 is less than 2.5 MPa.

[0049] The number of noise reduction plates 11 is determined according to the pressure reduction value that the adjustment mechanism 1 needs to bear.

[0050] In some optional embodiments, when the fluid passing through is steam or gas, according to Determine the total number of noise reduction panels 11, where n is the total number of panels. is the pressure in front of the first noise reduction plate 11, It is the pressure behind the last noise reduction plate 11.

[0051] In some optional embodiments, when the fluid passing through is liquid, according to , calculate the total number n of noise reduction panels 11.

[0052] It should be noted that no matter whether the fluid passing through is gas, steam or liquid, it is necessary to round n to an integer after obtaining the value of n, and then redistribute the pressure in front of and behind each noise reduction plate 11. The pressure behind the mth noise reduction plate 11 is according to Determine, and thereby determine the pressure in front of and behind each noise reduction plate 11 after flow limiting.

[0053] It can be understood that the pressure behind each noise reduction plate after flow limiting is the pressure in front of the next noise reduction plate. Therefore, the pressure in front of and behind each noise reduction plate 11 after flow limiting can be obtained in sequence according to the total number of noise reduction plates 11.

[0054] In some optional embodiments, when the passing fluid is gas or steam, the number of holes in each noise reduction plate 11 and the aperture of a single through hole 111 are determined based on the pressure in front of and behind each noise reduction plate 11 .

[0055] according to , determine the aperture of through hole 111 ;in, is the aperture of the through hole 111, W is the weight flow rate of the fluid, C is the flow coefficient of the noise reduction plate 11, is the front pressure of the noise reduction board, is the pressure behind the noise reduction plate, M is the molecular weight, and Z is the compression coefficient (which can be calculated based on the fluid pressure). Comparison of temperature (obtained from the gas compressibility diagram), T is the fluid temperature before the noise reduction plate 11, and K is the adiabatic index.

[0056] It should be noted that when the known parameter values are introduced, we get The relationship between C and the default C value is solved. ;according to The ratio of C and The C value is reviewed based on the relationship table. If the review is incorrect, the C value is reset until it is correct. Solving the relationship between C and This is the final confirmed value.

[0057] In this example, the default C value is used to solve Value, then retain two significant figures according to the accuracy of the equipment processing, and then use C and Of course, in other embodiments, the C value can also be retained. In some optional embodiments, when liquid passes through the noise reduction plate 11 and there are at least two noise reduction plates 11, the aperture of each through hole 111 of each noise reduction plate 11 is determined based on the front-to-back pressure of each noise reduction plate 11.

[0058] according to , determine the aperture of a single through hole 111 on each noise reduction plate 11 , where Q is the volume flow rate under working condition, C is the flow coefficient of the noise reduction plate, is the pressure drop across the noise reduction plate, is the relative density under working conditions.

[0059] In this example, no matter the fluid passing through is gas, steam or liquid, when there are multiple through holes 111 on the noise reduction plate 11, , determine the total number N of through holes 111 on each noise reduction plate 11 , where d is the preset aperture of each through hole 111 .

[0060] At the same time, in some optional embodiments, the thickness of the noise reduction plate 11 can also be set. When the fluid temperature is less than 375°, ;When the fluid temperature is greater than 375°, , where H is the thickness of the noise reduction plate 11, is the pressure drop difference between the front and back of the noise reduction plate 11, D is the inner diameter of the pipe of the above-mentioned flow channel, is the allowable stress, is the deflection coefficient.

[0061] The present invention solves the problems in the prior art of limited noise reduction effect of single-stage throttling, vertical space occupation of multi-stage throttling, and cumbersome operation of consecutively arranged multiple valves by providing a horizontal multi-layer noise reduction regulating valve. The pressure reduction value required by the regulating mechanism is determined by the pressure reduction value required by the system pipeline and the designed pressure reduction value of the ball valve, so that it can be flexibly designed according to the needs of different scenarios. By increasing or decreasing the number of noise reduction plates, changing the size and number of through holes on the noise reduction plates, and changing the arrangement of the through holes, the pressure of the fluid can be flexibly adjusted to make the pressure distribution of the fluid in the flow channel more uniform, thereby achieving the purpose of reducing flow-induced vibration and reducing valve throttling noise. The present invention not only has the advantages of simple structure, easy processing, low manufacturing cost and convenient installation, but also can be flexibly designed according to different needs and has a wide range of applications.

[0062] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0064] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A parameter design method for a horizontal multi-layer noise reduction regulating valve, which is used to design a horizontal multi-layer noise reduction regulating valve. The horizontal multi-layer noise reduction regulating valve includes: An adjustment mechanism (1) comprising at least one noise reduction plate (11), each of the noise reduction plates (11) being provided with at least one through hole (111) for fluid to pass through, and two adjacent noise reduction plates (11) being arranged horizontally at intervals; A ball valve (2) is provided in the flow passage of the regulating mechanism (1) and is connected in series with the regulating mechanism (1); It is characterized in that it includes the following steps: Determine the pressure reduction value that the regulating mechanism (1) needs to bear based on the pressure reduction value required by the system pipeline and the designed pressure reduction value of the ball valve (2); Determining the number of noise reduction plates (11) according to the pressure reduction value required by the regulating mechanism (1); According to the number of the noise reduction plates (11), the pressure in front of and behind each noise reduction plate (11) after flow limiting is determined; Determining the number of through holes (111) on each noise reduction plate (11) and the aperture of the through holes (111) according to the pressure of the front and rear of each noise reduction plate (11); When the number of noise reduction plates (11) is determined based on the pressure reduction value that the regulating mechanism (1) needs to bear: If the gas or steam passes through the noise reduction plate (11), when the pressure behind each noise reduction plate (11) is greater than or equal to 55% of the pressure in front of the plate, one noise reduction plate (11) is used; when the pressure behind each noise reduction plate (11) is less than 55% of the pressure in front of the plate, multiple noise reduction plates (11) are used, and the number of plates should meet the requirement that the pressure behind each noise reduction plate (11) is greater than 55% of the pressure in front of the plate; If the liquid passes through the noise reduction plate (11), when the pressure drop of the liquid is less than or equal to 2.5 MPa, one noise reduction plate (11) is used; when the pressure drop of the liquid is greater than 2.5 MPa, multiple noise reduction plates (11) are used, and the pressure drop of each noise reduction plate (11) is less than 2.5 MPa; When the gas or steam passes through the noise reduction plate (11), and there are at least two noise reduction plates (11): The number of the noise reduction panels (11) is based on Determine, where n is the total number of blocks, is the pressure in front of the first noise reduction plate (11), is the pressure behind the last noise reduction plate (11).

2. The parameter design method of a horizontal multi-layer noise reduction regulating valve according to claim 1, characterized in that: When liquid passes through the noise reduction plate (11), and there are at least two noise reduction plates (11), determining the number of noise reduction plates (11) includes: according to , calculate the total number of blocks n.

3. The parameter design method of a horizontal multi-layer noise reduction regulating valve according to claim 2, characterized in that: The method of determining the aperture of a single through hole (111) of each noise reduction plate (11) based on the front-back pressure of each noise reduction plate (11) comprises: according to , determine the aperture of a single through hole (111) on each noise reduction plate (11) , where Q is the volume flow rate under working condition, C is the flow coefficient of the noise reduction plate, is the pressure drop across the noise reduction plate, is the relative density under working conditions.

4. The parameter design method of a horizontal multi-layer noise reduction regulating valve according to claim 3, characterized in that: When there are multiple through holes (111) on the noise reduction plate (11): according to , determining the total number N of through holes (111) on each noise reduction plate (11), wherein d is a preset aperture of each through hole (111).

5. The parameter design method of a horizontal multi-layer noise reduction regulating valve according to claim 1, characterized in that: The method of determining the front and rear pressure of each noise reduction plate (11) after flow limiting according to the number of the noise reduction plates (11) comprises: according to , determine the pressure behind the mth noise reduction plate (11) , and thereby determine the pressure in front of and behind each noise reduction plate (11) after flow limiting.

Images