A Direct-Buried Underground Pressure Regulating Box and Its Usage Method

Abstract

The present invention belongs to the technical field of gas transmission and distribution equipment, and discloses a directly buried underground pressure regulating box and its use method. Its main technical features are: including a box body, the box body includes a bottom pressure-bearing chamber and a top non-pressure-bearing chamber, the bottom pressure-bearing chamber includes a filter cut-off cylinder and a pressure regulating cylinder, the filter cut-off cylinder is provided with an upper air inlet chamber, a lower first clean air chamber air inlet pipe, a filter element, and a cut-off valve, the pressure regulating cylinder is provided with an upper air outlet chamber, a lower second clean air chamber, an air outlet pipe, a pressure regulator, and a muffler, a first non-pressure-bearing chamber is provided above the filter cut-off cylinder, and a second non-pressure-bearing chamber is provided above the pressure regulating cylinder. A directly buried underground pressure regulating box provided by the present invention has a double-cylinder structure that adopts a simple air path structure, and is combined with two buffer areas of the clean air cavity and the air outlet cavity, thereby avoiding the influence of complex air paths on the flow state, and can effectively ensure the stability of the gas supply. The interface layout of the non-pressure-bearing cavity is clear, neat, easy to understand, and easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of gas transmission and distribution equipment, and in particular relates to a directly buried underground pressure regulating box and a use method thereof. Background Art

[0002] With the rapid development of China's urbanization, domestic cities have higher and higher requirements for urban appearance and environment. Traditional floor-standing gas pressure regulating devices and their supporting open-air pipelines are increasingly unable to meet the requirements of urban management. Coupled with the increasing shortage of urban land, there is a trend of public facilities turning from open-air to underground.

[0003] Gas pressure regulating equipment, which occupies a smaller area and is buried directly underground, is a good solution to the problem of gas equipment placement in urban management.

[0004] However, direct buried underground voltage regulating equipment is not as simple as transferring the original above-ground equipment to underground installation. It must be safer and more reliable, convenient for ground operation, and must not have confined space that may cause personal safety problems.

[0005] The existing underground voltage regulating box technology generally simplifies and pieces together the existing ground equipment, installs it in a protective box, and then buries it underground. This has the following problems:

[0006] First, directly use the voltage regulator unit commonly used in ground equipment

[0007] When the universal voltage regulator is installed on the ground, there is enough space for installation, maintenance and operation. However, after it is installed in the narrow space after being buried underground, the traditional flange installation method is no longer applicable, and there is no longer enough space for maintenance and operation. This has become a major reason for the difficulty in maintenance and operation of the main body of the underground voltage regulating equipment.

[0008] And the general voltage regulator also has the problem of parameter applicability:

[0009] The pressure regulator that meets the pressure and flow parameters has a complex structure and large size, which increases the difficulty of burying it underground;

[0010] The voltage regulator that meets the requirements of underground structure and volume is unstable due to mismatch of pressure parameters;

[0011] Second, the above-ground pipeline connection is not suitable for underground equipment

[0012] The underground equipment space is limited, and it is impossible to use the above-ground pipe connection form, especially flange, thread and other connections, because there is no space for fastening or disassembly. The existing technology still uses the traditional connection form, which will inevitably cause the underground space to expand. First, it takes up more space, and second, there is a restricted space in the protective box, which requires personnel to enter the restricted space for operation, which will inevitably cause major personal safety hazards;

[0013] Third, the influence of flow state

[0014] The existing technology accommodates the installation of general equipment, resulting in many changes in the internal gas path, and the flow channel structure cannot maintain a good shape, which seriously affects the flow pattern of the airflow and causes unstable air supply;

[0015] Fourth, layout issues

[0016] Common structural layout of underground voltage regulating box in existing technology:

[0017] The first large volume box layout

[0018] Use a large-volume cylinder or box as a protective shell to insert pipelines, pressure regulating equipment, safety protection equipment, filtering equipment, etc.

[0019] Disadvantages: Due to its large size, workers cannot operate and repair it on the ground, so they need to enter the shell, which causes limited space problems and poses huge safety hazards;

[0020] The second highly integrated layout

[0021] In order to obtain a smaller occupied space, small-sized pressure regulating equipment is used, which greatly sacrifices the satisfaction of the pressure regulating equipment for working condition performance. In addition, the small-volume pressure regulating equipment, safety protection equipment, filtering equipment, etc. are over-compressed into overlapping combinations, which brings difficulties to maintenance. Often, the overlapping combination must be lifted out of the ground to carry out subsequent work, which greatly increases the difficulty of on-site work. In addition, after the space is extremely compressed, various process lines, signal feedback pipelines, etc. are complicated and messy, which increases the operability of maintenance and recovery;

[0022] The third open layout

[0023] In order to solve the problem of limited space caused by the complex internal structure and large space, the protective shell is made into an open layout to increase ventilation performance and avoid potential safety hazards for personnel. The open structure cannot prevent rain, flooding, or even the most basic physical protection, resulting in the protective shell being unable to play a real protective role.

[0024] In summary, the existing underground voltage regulating boxes have not been redeveloped from the perspectives of performance, structure and ergonomics for the characteristics of underground equipment, but rather have been based on the original characteristics of above-ground equipment. Such products often bring negative user experience to users of underground equipment, thus affecting the promotion of underground voltage regulating equipment. Summary of the invention

[0025] The first technical problem to be solved by the present invention is to provide a directly buried underground voltage regulating box with clear spatial layout and convenient operation.

[0026] In order to solve the above problems, the technical solution adopted by the present invention is as follows: comprising a box body, wherein the box body comprises a bottom pressure-bearing cavity and a top non-pressure-bearing cavity,

[0027] The bottom pressure-bearing chamber includes a filter cut-off cylinder and a pressure regulating cylinder. The filter cut-off cylinder is provided with a first partition, which divides the filter cut-off cylinder into an upper air inlet cavity and a lower first clean air cavity. The upper air inlet cavity is provided with an air inlet pipe, a filter element, and a cut-off valve. The pressure regulating cylinder is provided with a second partition, which divides the pressure regulating cylinder into an upper air outlet cavity and a lower second clean air cavity. The upper air outlet cavity is provided with an air outlet pipe, a pressure regulator, and a muffler. The lower first clean air cavity and the lower second clean air cavity are connected through a connecting pipe.

[0028] A first non-pressure-bearing cavity is arranged on the filter and cut-off cylinder, a first top cover is arranged on the top of the first non-pressure-bearing cavity, and a cut-off valve actuator, a cut-off cover plate, a filter cover plate, a front pressure instrument, a differential pressure instrument, a gas support, a foldable boom, a boom swivel seat, and a boom extension section are arranged in the first non-pressure-bearing cavity;

[0029] A second non-pressure-bearing chamber is arranged on the top of the pressure regulating cylinder, a second top cover is arranged on the top of the second non-pressure-bearing chamber, and a pressure feedback signal tube, a rear pressure instrument, a controller, a manual vent valve, an inspection cover, a pressure regulating area cover, a vent pipe interface, a vent valve, and a vent root valve are arranged in the second non-pressure-bearing chamber.

[0030] The second technical problem to be solved by the present invention is to provide a method for using a directly buried underground voltage regulating box.

[0031] 2. To solve the above problems, the technical solution adopted by the present invention includes the following steps:

[0032] First step installation

[0033] The box is buried underground, the inlet pipe is connected to the upstream gas pipeline, and the outlet pipe is connected to the downstream gas pipeline;

[0034] The second step

[0035] The upstream gas comes from the air pipe and enters the filter cut-off cylinder, is first purified by the filter element, and then enters the first clean air cavity at the bottom, and then enters the second clean air cavity at the bottom through the connecting pipe. The purified gas enters the pressure regulator upward from the second clean air cavity. After the pressure of the purified gas is adjusted by the pressure regulator, the purified gas enters the muffler through the top outlet of the pressure regulator for noise reduction. The low-pressure gas after pressure reduction and noise reduction is buffered in the upper outlet cavity and then passes to the downstream through the outlet pipe;

[0036] The third step is maintenance

[0037] Open the first cover and the second cover, observe the status instruments, and perform the cut-off and voltage regulation operations and debugging.

[0038] The present invention provides a direct-buried underground pressure regulating box, which adopts a layered cavity and a double-tube structure layout. The layered cavity divides the box into a bottom pressure-bearing cavity and a top non-pressure-bearing cavity. The double-tube structure divides the bottom pressure-bearing cavity into a filter cut-off cylinder and a pressure regulating cylinder. The filter cut-off cylinder is provided with an upper air inlet cavity and a lower first clean air cavity. The upper air inlet cavity is provided with an air inlet pipe, a filter element, and a cut-off valve. The pressure regulating cylinder is provided with an upper air outlet cavity and a lower second clean air cavity. The upper air outlet cavity is provided with an air outlet pipe, a pressure regulator, and a silencer. The lower first clean air cavity and the lower second clean air cavity are connected by a connecting pipe. The upper air inlet cavity is connected to the air inlet pipe to introduce upstream natural gas. After the upstream natural gas is filtered by the filter element, the purified gas enters the lower first clean air cavity and the lower second clean air cavity, and then the purified gas enters the upper air outlet cavity after pressure regulation by the pressure regulator, and the gas is output through the air outlet pipe.

[0039] The first non-pressure chamber on the filter and cut-off cylinder and the second non-pressure chamber on the pressure regulating cylinder are mainly used for the installation of instruments, signal pipelines, and venting pipelines of the direct-buried underground pressure regulating box, and are also the partition between the bottom pressure chamber and the top non-pressure chamber. The observation of the status instrument of the direct-buried underground pressure regulating box, the operation and debugging of the cut-off and pressure regulation are all carried out in the top non-pressure chamber.

[0040] When the direct-buried underground pressure regulating box provided by the present invention is used, the box body is buried underground, the air inlet pipe is connected to the upstream gas pipeline, and the air outlet pipe is connected to the downstream gas pipeline. After the upstream gas enters the filter cut-off cylinder from the air inlet pipe, it is first purified by the filter element, and then enters the lower first clean air cavity, and then enters the lower second clean air cavity through the connecting pipe. The lower first clean air cavity and the lower second clean air cavity make the bottom of the box body have a flat large space clean air chamber, which is convenient for the collection and buffering stability of the purified gas. The purified gas after buffering and stabilization enters the pressure regulator upward. After the pressure of the purified gas is adjusted by the pressure regulator, the purified gas enters the muffler through the top outlet of the pressure regulator for noise reduction. After the low-pressure gas after pressure reduction and noise reduction is buffered in the upper air outlet cavity, it passes to the downstream through the air outlet pipe.

[0041] The present invention provides a direct-buried underground pressure regulating box, and the double-cylinder structure adopts a simple air path structure, and combines two buffer areas of a clean air cavity and an air outlet cavity, thereby avoiding the influence of complex air paths on the flow state, and can effectively ensure the stability of the air supply. The interface layout of the non-pressure chamber is clear, neat, and easy to understand, which makes it easy for users to get started and reduces the learning cost. A folding boom is configured to facilitate local materials when large internal equipment needs to be removed, reducing the difficulty of on-site operations. The voltage regulator adopts a special underground axial flow voltage regulator, and its installation method adopts a disassembly-free structure. It is directly inserted into the positioning plate mounting hole in the air outlet cavity, and then tightened by a muffler and an inspection cover, eliminating the trouble of disassembling and assembling flange bolts or threads of general voltage regulators. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a direct-buried underground voltage regulating box of the present invention;

[0043] Figure 2 It is a structural schematic diagram of a directly buried underground voltage regulating box with the first top cover and the second top cover opened;

[0044] Figure 3 It is a structural schematic diagram of the airflow during ventilation of a directly buried underground pressure regulating box;

[0045] Figure 4 It is a schematic diagram of the structure of the first non-pressure chamber and the second non-pressure chamber;

[0046] Figure 5 It is a schematic diagram of the installation structure of a direct buried underground voltage regulating box;

[0047] Figure 6 for Figure 5 Top view of the . DETAILED DESCRIPTION

[0048] The specific structure of a direct-buried underground voltage regulating box of the present invention is further described in detail below with reference to the accompanying drawings.

[0049] like Figure 1 , Figure 2 , Figure 3As shown, a direct-buried underground pressure regulating box of the present invention comprises a box body consisting of a bottom pressure-bearing chamber 1 and a top non-pressure-bearing chamber 2, the bottom pressure-bearing chamber 1 comprises a filter cut-off cylinder 3 and a pressure regulating cylinder 4, the filter cut-off cylinder 3 is provided with a first partition 5, the first partition 5 separates the filter cut-off cylinder 3 into an upper air supply chamber 6 and a lower first clean air chamber 7, the upper air supply chamber 6 is provided with an air supply pipe 8, a filter element 9, and a cut-off valve 10, the pressure regulating cylinder 4 is provided with a second partition 11, the second partition 11 separates the pressure regulating cylinder 4 into The partition is divided into an upper air outlet chamber 12 and a lower second clean air chamber 13. The upper air outlet chamber 12 is provided with an air outlet pipe 14, a pressure regulator 15 and a muffler 16. The lower first clean air chamber 7 and the lower second clean air chamber 13 are connected by a connecting pipe 17. A first non-pressure chamber 18 is provided on the top of the filter and cut-off cylinder 3, and a first top cover 19 is provided on the top of the first non-pressure chamber 18. A second non-pressure chamber 20 is provided on the top of the pressure regulating cylinder 4, and a second top cover 21 is provided on the top of the second non-pressure chamber 20.

[0050] like Figure 4 As shown, the first non-pressure-bearing chamber 18 is provided with a first top cover 19, and the first non-pressure-bearing chamber 18 is provided with a shut-off valve actuator 22, a shut-off cover plate 23, a filter cover plate 24, a front pressure instrument 25, a differential pressure instrument 26, a gas support 27, a folding boom 28, a boom swivel seat 29, and a boom extension section 30; the second non-pressure-bearing chamber 20 is provided with a second top cover 21, and the second non-pressure-bearing chamber 20 is provided with a pressure feedback signal tube 31, a rear pressure instrument 32, a controller 33, a manual vent valve 34, a maintenance cover plate 35, a pressure regulating area cover plate 36, a relief pipe interface 37, a relief valve 38, and a relief root valve 39.

[0051] like Figure 5 , Figure 6 As shown, the box body composed of the bottom pressure-bearing chamber 1 and the top non-pressure-bearing chamber 2 is buried underground, and a low-position ventilation pipe 40, a high-position ventilation pipe 41, and a discharge pipe 42 are provided on the ground. The box body is provided with an air inlet pipe 8, an air outlet pipe 14, a discharge pipe interface 37, a low-position ventilation pipe interface, and a high-position ventilation pipe interface 43. A first directly buried valve 44 is provided on one side of the air inlet pipe 8, and a second directly buried valve 45 is provided on the air outlet pipe 14.

[0052] The present invention provides a directly buried underground pressure regulating box, which adopts a layered cavity and a double-tube structure layout. The layered cavity divides the box into a bottom pressure-bearing cavity 1 and a top non-pressure-bearing cavity 2. The double-tube structure divides the bottom pressure-bearing cavity 1 into a filter cut-off cylinder 3 and a pressure regulating cylinder 4. The filter cut-off cylinder 3 is provided with an upper air inlet cavity 6 and a lower first clean air cavity 7. The upper air inlet cavity 6 is provided with an air inlet pipe 8, a filter element 9, and a cut-off valve 10. The pressure regulating cylinder 4 is provided with an upper air outlet cavity 12 and a lower second clean air cavity 13. The upper air outlet cavity 12 is provided with an air outlet pipe 14, a pressure regulator 15, and a muffler 16. The lower first clean air cavity 7 and the lower second clean air cavity 13 are connected through a connecting pipe 17. The upper air inlet cavity 6 is connected to the air inlet pipe 8 to introduce upstream natural gas. After the upstream natural gas is filtered by the filter element 9, the purified gas enters the lower first clean gas chamber 7 and the lower second clean gas chamber 13, and then the purified gas enters the upper gas outlet chamber 12 after being pressure-regulated by the pressure regulator 15, and the gas is output through the gas outlet pipe 14.

[0053] The first non-pressure chamber 18 on the filter and cut-off cylinder 3 and the second non-pressure chamber 20 on the pressure regulating cylinder 4 are mainly used as installation spaces for instruments, signal pipelines, and venting pipelines of the direct-buried underground pressure regulating box, and are also partitions between the bottom pressure chamber 1 and the top non-pressure chamber 2. The observation of the status instrument, the operation of cutting and pressure regulation, and the debugging of the direct-buried underground pressure regulating box are all carried out in the top non-pressure chamber 2.

[0054] When the direct-buried underground pressure regulating box provided by the present invention is used, the box body is buried underground, the air inlet pipe 8 is connected to the upstream gas pipeline, and the air outlet pipe 14 is connected to the downstream gas pipeline. After the upstream gas enters the filter cut-off cylinder 3 from the air inlet pipe 8, it is first purified by the filter element 9, and then enters the lower first clean air cavity 7, and then enters the lower second clean air cavity 13 through the connecting pipe 17. The lower first clean air cavity 7 and the lower second clean air cavity 13 make the bottom of the box body have a flat large space clean air cavity, which is convenient for the collection and buffering stability of the purified gas. The purified gas after buffering and stabilization enters the pressure regulator 15 upward. After the pressure of the purified gas is adjusted by the pressure regulator 15, the purified gas enters the muffler 16 through the top outlet of the pressure regulator 15 for noise reduction. After the low-pressure gas after pressure reduction and noise reduction is buffered in the upper air outlet cavity 12, it passes to the downstream through the air outlet pipe 14.

[0055] The present invention provides a direct-buried underground pressure regulating box, the double-cylinder structure adopts a simple air path structure, and combines two buffer areas of a clean air cavity and an air outlet cavity, thereby avoiding the influence of a complex air path on the flow state, and can effectively ensure the stability of the air supply. The interface layout of the non-pressure chamber is clear, neat, and easy to understand, and the user has low difficulty in getting started, which reduces the learning cost. A folding boom 28 is configured to facilitate local materials when large internal equipment needs to be removed, reducing the difficulty of on-site operation. The voltage regulator adopts a special underground axial flow voltage regulator, and its installation method adopts a disassembly-free structure. It is directly inserted into the positioning plate mounting hole in the air outlet cavity, and then tightened by a muffler and an inspection cover, eliminating the trouble of disassembling and assembling flange bolts or threads of a general voltage regulator.

[0056] The directly buried underground voltage regulating box provided by the present invention is not limited to the above-mentioned structure. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A directly buried underground voltage regulating box, comprising a box body, characterized in that: The box body comprises a bottom pressure-bearing cavity and a top non-pressure-bearing cavity. The bottom pressure-bearing chamber includes a filter cut-off cylinder and a pressure regulating cylinder. The filter cut-off cylinder is provided with a first partition, which divides the filter cut-off cylinder into an upper air inlet cavity and a lower first clean air cavity. The upper air inlet cavity is provided with an air inlet pipe, a filter element, and a cut-off valve. The pressure regulating cylinder is provided with a second partition, which divides the pressure regulating cylinder into an upper air outlet cavity and a lower second clean air cavity. The upper air outlet cavity is provided with an air outlet pipe, a pressure regulator, and a muffler. The lower first clean air cavity and the lower second clean air cavity are connected through a connecting pipe. After the upstream gas enters the filter cut-off cylinder from the air pipe, it is first purified by the filter element, then enters the lower first clean air cavity, and then enters the lower second clean air cavity through the connecting pipe. The lower first clean air cavity and the lower second clean air cavity make the bottom of the box have a flat and large clean air cavity, which is convenient for the collection and buffering stability of the purified gas; The purified gas after buffering and stabilization enters the pressure regulator upwards. After the pressure of the purified gas is adjusted by the pressure regulator, the purified gas enters the muffler through the top outlet of the pressure regulator for noise reduction. The low-pressure gas after pressure reduction and noise reduction is buffered in the upper air outlet cavity and then passes to the downstream through the air outlet pipe. A first non-pressure-bearing cavity is arranged on the filter and cut-off cylinder, a first top cover is arranged on the top of the first non-pressure-bearing cavity, and a cut-off valve actuator, a cut-off cover plate, a filter cover plate, a front pressure instrument, a differential pressure instrument, a gas support, a foldable boom, a boom swivel seat, and a boom extension section are arranged in the first non-pressure-bearing cavity; A second non-pressure-bearing chamber is arranged on the top of the pressure regulating cylinder, a second top cover is arranged on the top of the second non-pressure-bearing chamber, and a pressure feedback signal tube, a rear pressure instrument, a controller, a manual vent valve, an inspection cover, a pressure regulating area cover, a vent pipe interface, a vent valve, and a vent root valve are arranged in the second non-pressure-bearing chamber.

2. The method for using the direct buried underground voltage regulating box according to claim 1, characterized in that The steps include: First step installation The box is buried underground, the inlet pipe is connected to the upstream gas pipeline, and the outlet pipe is connected to the downstream gas pipeline; The second step The upstream gas comes from the air pipe and enters the filter cut-off cylinder, is first purified by the filter element, and then enters the first clean air cavity at the bottom, and then enters the second clean air cavity at the bottom through the connecting pipe. The purified gas enters the pressure regulator upward from the second clean air cavity. After the pressure of the purified gas is adjusted by the pressure regulator, the purified gas enters the muffler through the top outlet of the pressure regulator for noise reduction. The low-pressure gas after pressure reduction and noise reduction is buffered in the upper outlet cavity and then passes to the downstream through the outlet pipe; The third step is maintenance Open the first cover and the second cover, observe the status instruments, and perform the cut-off and voltage regulation operations and debugging.

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