Self-regulating pressure reducing muffler sleeve valve

Abstract

The application provides an automatic pressure regulating and noise eliminating sleeve valve, which comprises an inlet elbow section, a resistive noise eliminating layer, a small-hole noise eliminating pipe, a valve plate and a valve rod, the valve rod drives the valve plate to move, the pipe axis direction of the inlet elbow section is perpendicular to the pipe axis direction of the small-hole noise eliminating pipe, the outlet end of the inlet elbow section is connected with the inlet end of the small-hole noise eliminating pipe, small holes are arranged on the pipe wall of the small-hole noise eliminating pipe to form an outlet, the valve plate is axially movable and arranged in the small-hole noise eliminating pipe, the resistive noise eliminating layer is sleeved outside the small-hole noise eliminating pipe to form a shell pipe, and the shell pipe formed by the resistive noise eliminating layer has an airflow outlet; the application controls the pressure difference before and after the valve by controlling the flow area of the perforated steel pipe, and realizes efficient reduction of the valve noise.

Description

Technical Field

[0001] This invention relates to the field of noise control technology, and more specifically, to an automatic pressure regulating silencer sleeve valve. Background Technology

[0002] The blast furnace gas pressure reducing valve assembly is a crucial piece of equipment in the blast furnace gas purification and recovery system. Purified blast furnace gas typically passes through this assembly, where its pressure is reduced from 0.13-0.27 MPa to 10-13 kPa before being put into operation. To achieve a significant pressure reduction, the butterfly valves in the assembly are opened very slightly during gas flow. At this point, the gas flow is in a blocked, jet-like state at the valve opening, generating strong turbulent and impact noise. Noise levels near the blast furnace gas pressure reducing valve assembly can typically reach 120-135 dBA, severely polluting the plant environment, hindering workers' ability to receive sound signals and thus affecting safe production. It also frequently leads to excessive noise levels at the plant boundary, impacting residents' lives. The intense vibrations pollute the environment, reduce equipment lifespan, and can even cause pipeline ruptures and safety accidents.

[0003] In the existing technology, the noise and vibration problems generated by the pressure regulating valve group can be addressed by installing a soundproof cover around the blast furnace gas pressure reducing valve group. However, the soundproof cover brings trouble to the maintenance and replacement of the pressure reducing valve group. Moreover, once the pressure reducing valve group leaks gas, the ventilation device on the soundproof cover is difficult to exhaust the residual gas in the dead corners inside the cover.

[0004] Vibration dampers or damping pads can also be installed at the bottom of the pressure reducing valve assembly and the silencer. However, vibration dampers or damping pads only have a vibration isolation function. They mainly isolate vertical vibrations, but the main vibration direction of the pressure reducing valve assembly is axial. The vibration acceleration of the pressure reducing valve assembly and the pipeline system itself is not reduced.

[0005] Bellows compensators can also be installed at both ends of the pressure reducing valve assembly. Although the bellows compensator can isolate some axial vibration, it cannot reduce the axial vibration acceleration of the pressure reducing valve assembly itself. Moreover, the bellows compensator is easy to break and troublesome to replace. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an automatic pressure regulating and noise-reducing sleeve valve, thereby resolving the issues existing in the prior art.

[0007] This invention provides an automatic pressure regulating silencer sleeve valve, comprising an inlet bend section, a resistive silencer layer, a small-hole silencer pipe, a valve plate, and a valve stem. The valve stem drives the valve plate to move. The pipe axis of the inlet bend section is perpendicular to the pipe axis of the small-hole silencer pipe. The outlet end of the inlet bend section is connected to the inlet end of the small-hole silencer pipe. A small hole is formed in the pipe wall of the small-hole silencer pipe to form an outlet. The valve plate is axially movable inside the small-hole silencer pipe. The resistive silencer layer is sleeved on the outside of the small-hole silencer pipe to form a shell pipe. The shell pipe formed by the resistive silencer layer has an airflow outlet.

[0008] Furthermore, the inlet bend section is also provided with a sealing cap that is coaxially connected to the small-hole silencer pipe. The sealing cap is coaxially connected to the valve stem support seat, and the valve stem is coaxially and movably mounted on the valve stem support seat.

[0009] Furthermore, a sealing ring is fixedly installed inside the small-hole silencer pipe, and a tail end cap is provided at the end of the small-hole silencer pipe away from the inlet bend section. The small hole of the small-hole silencer pipe is located between the sealing ring and the tail end cap, and there is an annular gap between the small-hole silencer pipe and the valve plate.

[0010] Furthermore, the tail end cap of the small-hole silencer is coaxially connected to the valve stem support, the valve stem is coaxially and movably mounted on the valve stem support, the valve stem is supported by the valve stem support of the sealing gland and the valve stem support of the tail end cap of the small-hole silencer, and the valve stem drive end is connected to a hydraulic cylinder.

[0011] The valve plate is axially movable between the sealing ring and the tail end cap. The valve plate is coaxially fixed on the valve stem, and a sealing gasket is provided on the side of the valve plate near the sealing ring.

[0012] Furthermore, the valve plate is fixedly connected to the large end of a telescopic conical sleeve assembly on the side away from the tail end cap of the small hole silencer pipe, and the small end of the sleeve assembly is fixedly connected to a sleeve fixing sleeve.

[0013] Furthermore, the sleeve fixing sleeve is installed on the inlet side of the small hole silencer pipe, and both the sleeve assembly and the sleeve fixing sleeve are sleeved on the outside of the valve stem.

[0014] Furthermore, the perforated silencer has small holes evenly distributed on the pipe wall, and the total flow area of ​​the small holes on the pipe wall accounts for 30-100% of the flow area of ​​the perforated pipe cross section.

[0015] Furthermore, the resistive sound-absorbing layer has an inner layer, an outer layer, and a filling layer, wherein the inner layer is a perforated steel plate facing, the outer layer is a steel plate, and the filling layer is a sound-absorbing material.

[0016] Furthermore, the sleeve assembly consists of 4-10 conical sleeves.

[0017] The automatic pressure regulating and silencing sleeve valve of this invention can be used at the pressure regulating point of blast furnace gas. The valve plate position is controlled by pushing the valve stem through the hydraulic system, and the pressure difference before and after the valve is controlled by controlling the flow area of ​​the perforated steel pipe. The valve noise and vibration are effectively reduced by using throttling pressure reduction and small-hole injection silencing method.

[0018] This invention allows for automatic pressure regulation by adjusting the valve opening using a hydraulic device based on the pressure before and after the sleeve valve. The automatic pressure-regulating and silencer sleeve valve can be used alone or in parallel to form a valve group. By cooperating with an automatically adjustable silencer and rectifier grid, it can significantly reduce the pressure drop of the gas pressure-reducing valve group, thereby reducing the excitation force generated by the pressure-reducing valve group. This reduces noise and vibration in the entire system, improving the dynamic characteristics of the pipeline system and resulting in lower vibration.

[0019] When in use, the automatic pressure regulating and silencing sleeve valve of the present invention forms throttling at the telescopic sleeve and valve port, throttling at the valve plate and the inner wall of the perforated pipe, and throttling at the small hole of the perforated pipe. Its own multi-stage throttling and pressure reduction effect reduces the impact and noise generated by the gas pressure reducing valve group, and a silencer is not required downstream.

[0020] When the airflow passes through the perforated pipe, it forms many small jets, which then mix into a large jet with a larger area and lower velocity. The diffusion through the small holes can effectively reduce the turbulence noise and impact noise generated by the jet. As the diameter of the small holes decreases, the maximum noise reduction can reach 28dB.

[0021] The perforated tube of the automatic pressure regulating silencer sleeve valve of this invention has a frequency shifting effect on the noise of air jetting, which can shift the noise spectrum to higher frequencies. The resistive sound-absorbing layer installed outside the perforated tube has a good sound absorption effect on noise, especially high frequencies. The entire silencer sleeve valve is a composite structure of perforated jetting and resistive sound absorption, resulting in greater noise reduction.

[0022] This invention features active noise reduction with a large noise reduction capacity. Compared to the traditional butterfly valve's small-range pressure regulation action of 0-40 degrees, the automatic pressure regulating and noise-reducing sleeve valve of this invention has a larger pressure regulation action range and more linear pressure regulation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1A front view of an automatic pressure regulating and silencer sleeve valve provided by the present invention;

[0025] Figure 2 The diagram shows the state of the telescopic conical sleeve assembly of an automatic pressure regulating and silencing sleeve valve provided by the present invention when it is fully extended.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Inlet bend section, 2-Resistive silencing layer, 3-Small hole silencing pipe, 4-Valve plate, 5-Sealing gasket, 6-Sealing retaining ring, 7-Valve stem, 8-Valve stem support seat, 9-Sealing gland, 10-Sleeve assembly, 11-Hydraulic cylinder, 12-Sleeve fixing sleeve. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] See appendix Figure 1-2 This invention provides an automatic pressure regulating silencer sleeve valve, comprising an inlet bend section 1, a resistive silencer layer 2, a small-hole silencer pipe 3, a valve plate 4, and a valve stem 7. The valve stem 7 drives the valve plate 4 to move. The pipe axis of the inlet bend section 1 is perpendicular to the pipe axis of the small-hole silencer pipe 3. The outlet end of the inlet bend section 1 is connected to the inlet end of the small-hole silencer pipe 3. A small hole is formed in the pipe wall of the small-hole silencer pipe 3 to form an outlet. The valve plate 4 is axially movable inside the small-hole silencer pipe 3. The resistive silencer layer 2 is sleeved on the outside of the small-hole silencer pipe 3 to form a shell pipe. The shell pipe formed by the resistive silencer layer 2 has an airflow outlet.

[0031] Furthermore, the inlet bend section 1 is also provided with a sealing cap 9 that is coaxially connected to the small hole silencer pipe 3. The sealing cap 9 is coaxially connected to the valve stem support seat 8, and the valve stem 7 is coaxially and movably installed on the valve stem support seat 8.

[0032] Furthermore, a sealing ring 6 is fixedly installed inside the small-hole silencer pipe 3. A tail end cap is provided at the end of the small-hole silencer pipe 3 away from the inlet bend section 1. The small hole of the small-hole silencer pipe 3 is located between the sealing ring 6 and the tail end cap. There is an annular gap between the small-hole silencer pipe 3 and the valve plate 4.

[0033] Furthermore, the tail end cap of the small-hole silencer pipe 3 is coaxially connected to the valve stem support seat 8, and the valve stem 7 is coaxially and movably mounted on the valve stem support seat 8. The valve stem 7 is supported by the valve stem support seat 8 of the sealing cover 9 and the valve stem support seat 8 of the tail end cap of the small-hole silencer pipe 3. The driving end of the valve stem 7 is connected to the hydraulic cylinder 11.

[0034] Furthermore, the valve plate 4 is axially movable between the sealing ring 6 and the tail end cap to achieve different opening degrees, and the valve plate 4 is coaxially fixed on the valve stem 7.

[0035] Furthermore, a sealing gasket 5 is provided on the side of the valve plate 4 near the sealing ring 6. When the valve is closed, the valve plate 4 is pressed against the sealing ring 6 by the sealing gasket 5 to achieve a reliable seal.

[0036] Furthermore, the valve plate 4 is fixedly connected to the large end of the telescopic conical sleeve assembly 10 on the side away from the tail end cap of the small hole silencer pipe 3, and the small end of the sleeve assembly 10 is fixedly connected to the sleeve fixing sleeve 12.

[0037] Furthermore, the sleeve fixing sleeve 12 is installed on the inlet side of the small hole silencer pipe 3, and both the sleeve assembly 10 and the sleeve fixing sleeve 12 are sleeved on the outside of the valve stem 7.

[0038] Furthermore, the perforated silencer 3 has small holes evenly opened on the pipe wall, and the total flow area of ​​the small holes on the pipe wall accounts for 30-100% of the flow area of ​​the perforated pipe cross section.

[0039] Furthermore, the resistive sound-absorbing layer 2 has an inner layer, an outer layer, and a filling layer. The inner layer is a perforated steel plate facing, the outer layer is a steel plate, and the filling layer is a sound-absorbing material, which is ultrafine glass wool.

[0040] Furthermore, the sleeve assembly 10 consists of 4-10 conical sleeves, which extend or contract as the valve stem moves.

[0041] Furthermore, the airflow enters the small-hole silencer pipe vertically downward through the inlet bend section, passes through the perforated area on the pipe and is discharged to the outlet through the external resistive silencer shell pipe, with the inlet direction and outlet direction forming a 90-degree angle.

[0042] Furthermore, the valve stem is supported by a valve stem support, and a sealing structure is installed where the valve stem passes through the inlet bend to prevent gas leakage.

[0043] Furthermore, after the valve plate 4 leaves the sealing ring 6, the conical telescopic sleeve at the valve port creates a throttling effect.

[0044] Furthermore, there is an annular gap between the sleeve valve orifice silencer pipe 3 and the valve plate 4, where the airflow is throttled and depressurized.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic pressure regulating and silencing sleeve valve comprising an inlet elbow section (1), a resistive silencing layer (2), a small hole silencing tube (3), a valve plate (4), a valve stem (7) driving the valve plate (4) to move, characterized in that, The pipe axis of the inlet bend section (1) is perpendicular to the pipe axis of the small-hole silencer pipe (3). The outlet end of the inlet bend section (1) is connected to the inlet end of the small-hole silencer pipe (3). A small hole is opened on the pipe wall of the small-hole silencer pipe (3) to form an outlet. The valve plate (4) is axially movable inside the small-hole silencer pipe (3). The resistive silencing layer (2) is sleeved on the outside of the small-hole silencer pipe (3) to form a shell pipe. The shell pipe formed by the resistive silencing layer (2) has an airflow outlet. The inlet bend section (1) is also provided with a sealing cap (9) coaxially connected to the small hole silencer pipe (3). The sealing cap (9) is coaxially connected to the valve stem support (8). The valve stem (7) is coaxially and movably mounted on the valve stem support (8). A sealing ring (6) is also fixedly installed inside the small-hole silencer pipe (3). A tail end cap is provided at the end of the small-hole silencer pipe (3) away from the inlet bend section (1). The small hole of the small-hole silencer pipe (3) is located between the sealing ring (6) and the tail end cap. There is an annular gap between the small-hole silencer pipe (3) and the valve plate (4). The tail end cap of the small-hole silencer pipe (3) is coaxially connected to the valve stem support seat (8). The valve stem (7) is coaxially and movably mounted on the valve stem support seat (8). The valve stem (7) is supported by the valve stem support seat (8) of the sealing cover (9) and the valve stem support seat (8) of the tail end cap of the small-hole silencer pipe (3). The driving end of the valve stem (7) is connected to the hydraulic cylinder (11). The valve plate (4) is axially movable between the sealing ring (6) and the tail end cap. The valve plate (4) is coaxially fixed on the valve stem (7). A sealing gasket (5) is provided on the side of the valve plate (4) near the sealing ring (6). The valve plate (4) is fixedly connected to the large end of the telescopic conical sleeve assembly (10) on the side away from the tail end cap of the small hole silencer pipe (3), and the small end of the sleeve assembly (10) is fixedly connected to the sleeve fixing sleeve (12). The sleeve assembly (10) consists of 4-10 conical sleeves.

2. The self-regulating pressure compensating sleeve valve of claim 1, wherein, The sleeve fixing sleeve (12) is installed on the inlet side of the small hole silencer pipe (3), and the sleeve assembly (10) and the sleeve fixing sleeve (12) are both sleeved on the outside of the valve stem (7).

3. The automatic pressure regulating and silencer sleeve valve as described in claim 1, characterized in that, The small-hole silencer pipe (3) has small holes evenly opened on the pipe wall, and the total flow area of ​​the small holes on the pipe wall accounts for 30-100% of the flow area of ​​the perforated pipe cross section.

4. The automatic pressure regulating and silencer sleeve valve as described in claim 1, characterized in that, The resistive sound-absorbing layer (2) has an inner layer, an outer layer and a filling layer. The inner layer is a perforated steel plate facing, the outer layer is a steel plate, and the filling layer is a sound-absorbing material.

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