Fuel gas pressure regulating box integrated with filtering device

Abstract

The utility model discloses a fuel gas pressure regulating box integrated with a filter device, which comprises a box body, a pressure regulating valve main body is arranged in an upper pressure regulating cavity, one side of the pressure regulating valve main body is connected with a buffer pipe through a pipeline, and an inlet manifold connected with the pressure regulating valve main body and an outlet manifold connected with the buffer pipe are arranged in a lower filter cavity; a filter device is arranged on the inlet manifold and comprises a filter cartridge, a filter element is arranged in the filter cartridge and comprises an inner-layer filter screen and an outer-layer filter screen, a spiral flow guide column is arranged in the center of the filter cartridge, the top of the spiral flow guide column is connected with the inner top of the inner-layer filter screen, and a blow-down valve is arranged under the filter device on the inlet manifold; the filter element adopts a double-layer structure, the inner-layer filter screen intercepts particle impurities with larger diameters, and the outer-layer ceramic fiber screen captures dust, so that graded filtration is formed, and the filtration precision and efficiency are improved; the spiral flow guide column is arranged in the center of the filter cartridge, large-particle impurities move towards the inner wall of the filter cartridge by centrifugal force, and filter element blockage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas pressure regulating box technology, specifically a gas pressure regulating box with an integrated filtration device. Background Technology

[0002] With the widespread use of natural gas energy, gas pressure regulating boxes are essential pressure regulating devices in urban gas transmission and distribution systems to meet the gas pressure requirements of different users. However, the pressure regulators in these boxes are more susceptible to impurities in the gas as their service life increases. Therefore, gas filtration devices can be integrated and installed within the gas pressure regulating box.

[0003] However, traditional filter devices used in gas pressure regulating boxes have a simple structure and usually only use a single filter screen, which is difficult to effectively intercept impurities of different particle sizes (such as large particles and dust). This causes the pressure regulating valve and other core components to be clogged by impurities, affecting the pressure regulation accuracy and service life. In addition, when replacing or cleaning the filter element of the filter device, the entire pipeline needs to be disassembled, which is cumbersome. Furthermore, impurities are difficult to completely remove when deposited at the bottom of the filter device, and long-term use can easily cause pipeline blockage. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a gas pressure regulating box with an integrated filtration device. By optimizing the filtration structure, adding safety components and a flow guiding device, it effectively improves filtration efficiency, maintenance convenience, and safety performance.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: A gas pressure regulating box with an integrated filtration device includes a box body, which is divided into an upper pressure regulating chamber and a lower filtration chamber by a partition. The upper pressure regulating chamber is equipped with a pressure regulating valve body, and a buffer pipe is connected to one side of the pressure regulating valve body via a pipeline. The lower filtration chamber is equipped with an inlet manifold connected to the pressure regulating valve body and an outlet manifold connected to the buffer pipe. A filtration device for filtering gas is provided on the inlet manifold. The filtration device includes a filter cylinder, and a filter element is provided inside the filter cylinder. The filter element includes an inner filter screen for intercepting large particulate impurities and an outer filter screen for adsorbing dust. A spiral guide column is provided at the center of the filter cylinder, and the top of the spiral guide column is connected to the inner top of the inner filter screen. A drain valve is provided directly below the filtration device on the inlet manifold.

[0006] Furthermore, the filter element is a cone shape with a cross-section that gradually decreases from bottom to top, and the bottom sidewall of the filter element is fitted to the inner wall of the filter cylinder and connected inside the filter cylinder.

[0007] Furthermore, the inner filter screen is provided with a plurality of filter holes evenly distributed, and the inner filter screen is made of stainless steel, while the outer filter screen is made of ceramic fiber mesh.

[0008] Furthermore, a spiral guide plate is provided on the outer wall of the spiral guide column, the bottom of the filter cylinder is a tapered shape that tapers inward, and the filter cylinder is connected to the drain valve.

[0009] Furthermore, a first ball valve is provided on the inlet manifold above the filter device, and a second ball valve is provided on the outlet manifold.

[0010] Furthermore, a pressure gauge is provided between the pressure regulating valve body and the buffer pipe, and a safety valve is provided on the outlet manifold.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The filter element adopts a double-layer structure of "inner stainless steel filter mesh + outer ceramic fiber mesh". The inner filter mesh has evenly spaced pores to intercept larger diameter particulate impurities (such as rust, welding slag, etc.), while the outer ceramic fiber mesh utilizes its porous adsorption properties to effectively capture dust and fine impurities, forming a staged filtration system that improves filtration accuracy and efficiency. The filter element is designed in a cone shape with a larger bottom and a smaller top, with the bottom fitting snugly against the inner wall of the filter cylinder. This increases the contact area between the filter element and the gas, extends the airflow filtration path, and ensures that impurities are fully intercepted and adsorbed.

[0013] 2. A spiral guide column is set in the center of the filter cartridge, and the spiral guide plate on the outer wall guides the spiral flow of the gas. Centrifugal force is used to move large particles of impurities towards the inner wall of the filter cartridge, accelerating the sedimentation of impurities into the bottom conical area and reducing filter element clogging. A drain valve is connected to the bottom of the filter cartridge, through which impurities can be discharged periodically without disassembling the filter element, simplifying the maintenance process and avoiding excessive downtime. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is an exploded view of the filtration device in this utility model;

[0016] Figure 3 This is a cross-sectional view of the filtration device in this utility model.

[0017] In the diagram: 1-box body, 2-pressure regulating valve body, 3-buffer pipe, 4-inlet manifold, 5-outlet manifold, 6-filter device, 7-drain valve, 8-first ball valve, 9-second ball valve, 10-pressure gauge, 11-safety valve, 61-filter cartridge, 62-filter element, 63-spiral guide column, 621-inner filter screen, 622-outer filter screen, 631-spiral guide plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0020] Combination Figures 1 to 3 The gas pressure regulating box of the integrated filtration device shown includes a box body 1. The box body 1 is divided into an upper pressure regulating chamber and a lower filtration chamber by a partition. The upper pressure regulating chamber is equipped with a pressure regulating valve body 2. A buffer pipe 3 is connected to one side of the pressure regulating valve body 2 through a pipeline. The lower filtration chamber is equipped with an inlet manifold 4 connected to the pressure regulating valve body 2 and an outlet manifold 5 connected to the buffer pipe 3. A filtration device 6 for filtering gas is provided on the inlet manifold 4. The filtration device 6 includes a filter cylinder 61. A filter element 62 is provided inside the filter cylinder 61. The filter element 62 includes an inner filter screen 621 for intercepting large particulate impurities and an outer filter screen 622 for adsorbing dust. A spiral guide column 63 is provided at the center of the filter cylinder 61. The top of the spiral guide column 63 is connected to the inner top of the inner filter screen 621. A drain valve 7 is provided directly below the filtration device 6 on the inlet manifold 4.

[0021] like Figure 2-3 As shown, the filter element 62 is a cone shape with a cross-section that gradually decreases from bottom to top. The bottom sidewall of the filter element 62 is attached to the inner wall of the filter cylinder 61 and connected inside the filter cylinder 61. Multiple filter holes are evenly opened on the inner filter screen 621, and the inner filter screen 621 is made of stainless steel. The outer filter screen 622 is made of ceramic fiber. A spiral guide plate 631 is provided on the outer sidewall of the spiral guide column 63. The bottom of the filter cylinder 61 is a cone shape that tapers inward. The filter cylinder 61 is connected to the drain valve 7.

[0022] A first ball valve 8 is installed on the inlet manifold 4 above the filter device 6, and a second ball valve 9 is installed on the outlet manifold 5; a pressure gauge 10 is installed between the pressure regulating valve body 2 and the buffer pipe 3, and a safety valve 11 is installed on the outlet manifold 5. If the pressure regulating valve fails and causes abnormal outlet pressure, the safety valve 11 can be opened to release pressure, and at the same time the second ball valve 9 will be closed to isolate the downstream pipeline network.

[0023] Working principle: Gas enters the filter cylinder 61 of the filter device 6 through the inlet manifold 4. The spiral guide plate 631 of the spiral guide column 63 causes the gas to spiral. Large particles of impurities are thrown towards the inner wall of the filter cylinder 61 under the action of centrifugal force and settle down to the vicinity of the drain valve 7 along the conical bottom. The airflow continues to flow upward. The inner stainless steel filter screen 621 intercepts the remaining large particles of impurities, and the outer ceramic fiber mesh 622 adsorbs dust and fine impurities, completing the staged filtration. The filtered gas enters the pressure regulating valve body 2 of the upper pressure regulating chamber through the inlet manifold 4. The pressure regulating valve reduces the pressure of the gas according to the set pressure value to stabilize the output pressure within the target range. The pressure-regulated gas then flows through the pipeline. The gas flows into the buffer pipe 3, which reduces airflow fluctuations by expanding the flow channel volume. In conjunction with the pressure gauge 10, the pressure is monitored in real time to ensure a uniform and stable output pressure. The stabilized gas is then transported downstream through the outlet manifold 5. If the system pressure rises abnormally, the safety valve 11 automatically opens to release excess pressure and prevent overpressure in the pipeline. The second ball valve 9 can cut off the outlet gas source during maintenance, facilitating the maintenance of the outlet manifold 5 and subsequent equipment. During the filtration process, the gas flow is cut off by closing the first ball valve 8, and then the drain valve 7 is opened. The deposited impurities are discharged under the pressure of the gas. Thus, impurities can be discharged by periodically opening the drain valve 7. The cone-shaped filter cylinder bottom design concentrates impurities, making the filtration more thorough.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas pressure regulating tank integrated with a filtering device, comprising a tank body (1), characterized in that: The box (1) is divided into an upper pressure regulating chamber and a lower filtering chamber by a partition, the upper pressure regulating chamber is provided with a pressure regulating valve body (2), one side of the pressure regulating valve body (2) is connected with a buffer pipe (3) through a pipeline, the lower filtering chamber is provided with an inlet manifold (4) connected with the pressure regulating valve body (2) and an outlet manifold (5) connected with the buffer pipe (3); the inlet manifold (4) is provided with a filtering device (6) for filtering gas, the filtering device (6) comprises a filtering cylinder (61), the filtering cylinder (61) is provided with a filter core (62) therein, the filter core (62) comprises an inner layer filter screen (621) for intercepting large particle impurities and an outer layer filter screen (622) for adsorbing dust, a spiral flow guide column (63) is arranged at the center position of the filtering cylinder (61), the top of the spiral flow guide column (63) is connected with the inner top of the inner layer filter screen (621), and a blowdown valve (7) is arranged below the filtering device (6) on the inlet manifold (4).

2. The gas pressure regulating tank integrated with a filter device according to claim 1, characterized in that: The filter core (62) is in a conical shape with a cross section gradually decreasing from bottom to top, the bottom sidewall of the filter core (62) is attached to the inner wall of the filtering cylinder (61) and is connected to be arranged in the filtering cylinder (61).

3. The gas pressure regulating box integrated with a filter device according to claim 2, characterized in that: A plurality of filter holes are uniformly arranged on the inner layer filter screen (621), and the inner layer filter screen (621) is made of a stainless steel filter screen, and the outer layer filter screen (622) is made of a ceramic fiber screen.

4. The gas pressure regulating box integrated with a filter according to claim 3, characterized in that: A spiral flow guide plate (631) is arranged on the outer sidewall of the spiral flow guide column (63), the bottom of the filtering cylinder (61) is in a conical shape that is inwardly tapered, and the filtering cylinder (61) is connected with the blowdown valve (7).

5. The gas pressure regulating box integrated with a filter device according to claim 4, characterized in that: A first ball valve (8) is arranged on the inlet manifold (4) above the filtering device (6), and a second ball valve (9) is arranged on the outlet manifold (5).

6. The integrated filter device gas pressure regulating tank of claim 1, wherein: A pressure gauge (10) is arranged between the pressure regulating valve body (2) and the buffer pipe (3), and a safety valve (11) is arranged on the outlet manifold (5).

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