An explosion-proof multi-channel high-efficiency electronic pressure controller

Abstract

The present invention discloses an explosion-proof multi-channel high-efficiency electronic pressure controller, comprising a hexagonal core seat and a cover shell, wherein the cover shell is connected to the side wall of the hexagonal core seat, and the hexagonal core seat and the cover shell adopt an explosion-proof threaded joint surface and a compression sealing O-ring seal; the back of the hexagonal core seat has six air inlets, and the inlet is provided with a first mounting hole for installing a fire arrester, a fire arrester sealing gasket and an air inlet adapter; the hexagonal core seat is provided with an injection channel connected to the air inlet adapter to form six mutually unconnected flow path inlets. The present invention has a compact structure, high integration, relatively small size, simple processing, and convenient maintenance. It saves a lot of space for the integrated maintenance of modules with more than three channels, can simultaneously perform six-way sample gas regulation and control, improve the detection efficiency of the analyzer, and can also perform sample gas pressure regulation and control in steps.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure controllers, and in particular to an explosion-proof multi-channel high-efficiency electronic pressure controller. Background Art

[0002] During the gas chromatography analysis process, the injection of various sample gases needs to be continuous and stable to ensure the normal operation of the analyzer. The flow rate and pressure regulation of the carrier gas and sample gas are very important. For the common gas chromatographs on the market, the control devices used for pressure control are generally divided into two categories: mechanical valve control systems that manually adjust the pressure and electronic pressure control systems (EPC) that can automatically adjust the pressure.

[0003] In the past, manual regulating valves were used to control pressure. Mechanical valves lacked accurate scales, leading to pressure deviations and data anomalies. Furthermore, manual control requires observing the pressure value while adjusting, making the operation cumbersome and prone to human error.

[0004] Later, due to technological advancements, electronic pressure control systems (EPCs) that automatically adjust pressure were developed based on manual adjustment. Initially, one pressure adjustment control was grouped together. As instrument performance improved, most pressure adjustment controls are now grouped together into three. Although multi-channel adjustment control is now possible in practice, when there is a demand for multiple-channel pressure control, four or more EPC modules are often required, especially explosion-proof EPC modules. A three-channel explosion-proof EPC module is quite large and takes up a large amount of space within the analyzer. If four or more modules are used, this will have an adverse impact on the analyzer's size, internal integration, and subsequent maintenance, increasing the analyzer's size, weight, and shipping costs, and putting it at a disadvantage when competing with other brands of analyzers. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] In view of the above-mentioned problems existing in the existing explosion-proof multi-channel high-efficiency electronic pressure controller, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide an explosion-proof multi-channel high-efficiency electronic pressure controller with compact structure, high integration, relatively small size, simple processing, and convenient maintenance, which saves a lot of space for the integrated maintenance of modules with more than three channels.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: an explosion-proof multi-channel high-efficiency electronic pressure controller, comprising a hexagonal core seat and a cover, wherein the cover is connected to the side wall of the hexagonal core seat, and the hexagonal core seat and the cover adopt an explosion-proof threaded joint surface and are compressed and sealed with an O-ring;

[0009] The back of the hexagonal core seat has six air inlets, each of which has a first mounting hole for mounting a fire arrester, a fire arrester gasket, and an air inlet adapter. The hexagonal core seat is provided with an injection channel connected to the air inlet adapter to form six independent flow path inlets.

[0010] The bottom surface of the hexagonal core seat has six air outlets, and the outlet is provided with a second mounting hole for connecting to the fire arrester and the fire arrester sealing gasket, and the second mounting hole is also connected to the air outlet adapter and the long adapter. The hexagonal core seat is provided with a sample outlet channel connected to the air outlet adapter to form six independent flow outlets;

[0011] The six sides of the hexagonal core seat are provided with threaded holes for mounting the proportional valve and holes for sealing the gas path with an O-ring for the proportional valve. The proportional valve and the O-ring for the proportional valve are locked and sealed with locking screws to achieve the functions of adjusting the opening of the gas path and sealing.

[0012] The six sides of the hexagonal core seat are provided with pressure sensor detection ports, and the pressure sensor is compressed and sealed by a pressure block, a sensor pressing piece, a pressure sensor O-ring and a copper column.

[0013] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the back of the hexagonal core seat is provided with two explosion-proof clamping nuts, gaskets, and cable sealing rings, which are used to clamp the external inlet and outlet cables to meet the explosion-proof sealing requirements.

[0014] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the six inlet channels and the six outlet channels in the hexagonal core seat are not connected to each other, and six pressure detection channels are provided. Each pressure detection channel is respectively connected to each outlet channel, and is connected to the external pipeline through the outlet flame arrester and the outlet adapter.

[0015] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the fire-blocking device is sintered 316L stainless steel mesh with a filtration accuracy of 60 meshes.

[0016] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the fire arrester sealing gasket is made of PTFE material, and the inlet and outlet are sealed while the fire arrester is compressed by the air inlet adapter and the air outlet adapter.

[0017] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the air inlet adapter and the air outlet adapter are both threaded and made of 316L stainless steel. The hardness of the thread will not be damaged and leak due to replacement of external connecting pipes.

[0018] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the hexagonal core seat is made of 6061 aluminum alloy or 316L stainless steel; and the cover is made of 6061 aluminum alloy.

[0019] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, a control circuit connected to a pressure sensor is also provided in the cover, and a nameplate for recording product information is fixedly connected to the outer wall of the cover.

[0020] The beneficial effects of the present invention are as follows: the present invention has a compact structure, high integration, relatively small size, simple processing, and convenient maintenance. It saves a lot of space for the integrated maintenance of modules with more than three channels, can simultaneously perform six-channel sample gas regulation and control, improve the detection efficiency of the analyzer, and can also perform sample gas pressure regulation and control in steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0023] Figure 2 This is a schematic diagram of the back structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0024] Figure 3 This is a schematic diagram of the internal structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0025] Figure 4 This is a schematic diagram of the AA cross-sectional structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0026] Figure 5 This is a schematic diagram of the AA cross-sectional structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0030] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0031] Reference Figure 1-Figure 5 , provides an explosion-proof multi-channel high-efficiency electronic pressure controller, including a hexagonal core seat 1 and a cover shell 7, the cover shell 7 is connected to the side wall of the hexagonal core seat 1, and the hexagonal core seat 1 and the cover shell 7 adopt an explosion-proof threaded joint surface and are sealed by a compression sealing O-ring 8;

[0032] Among them, there are six air inlets on the back of the hexagonal core seat 1, and the inlet is provided with a first mounting hole for installing the fire arrester 11, the fire arrester sealing gasket 10 and the air inlet adapter. The hexagonal core seat 1 is provided with an injection channel 20 connected to the air inlet adapter 12 to form six mutually unconnected flow path inlets. Specifically, there are two explosion-proof clamping nuts 16, gaskets 15, and cable sealing rings 14 on the back of the hexagonal core seat 1, which are used to clamp the external inlet and outlet cables to meet the explosion-proof sealing requirements;

[0033] Among them, the bottom surface of the hexagonal core seat 1 has six air outlets, and the outlet is provided with a second mounting hole for connecting with the fire arrester 11 and the fire arrester sealing gasket 10, and the second mounting hole is also connected with the air outlet adapter and the long adapter 13. The hexagonal core seat 1 is provided with a sample outlet channel 21 connected to the air outlet adapter and forming six mutually unconnected flow outlets. Specifically, the six-way sample inlet channels and the six-way sample outlet channels in the hexagonal core seat 1 are not connected to each other, and six pressure detection channels 22 are provided. Each pressure detection channel 22 is respectively connected to each sample outlet channel 21, and is connected to the air outlet fire arrester and the air outlet through the air outlet fire arrester. The air inlet adapter is connected to the external pipeline. The fire arrester is sintered from 316L stainless steel mesh with a filtration accuracy of 60 mesh, which ensures that too much resistance will not be formed and can effectively prevent the explosion in the electronic pressure controller from spreading to the outside of the controller. The fire arrester sealing gasket 10 is made of PTFE. The air inlet adapter and the air outlet adapter are used to press the fire arrester 11 while sealing the air inlet and outlet. The air inlet adapter and the air outlet adapter are both threaded and made of 316L stainless steel. The hardness will not cause leakage due to damage to the threads due to replacement of external connecting pipelines.

[0034] Furthermore, the six sides of the hexagonal core seat 1 are provided with threaded holes for mounting a proportional valve and an O-ring 18 for sealing the air path. The proportional valve 2 and the O-ring 18 of the proportional valve are locked and sealed with a locking screw to achieve the air path opening adjustment and sealing functions. The hexagonal core seat 1 selects different materials according to different needs to control costs. When the corrosion resistance is low, the hexagonal core seat 1 uses 6061 aluminum alloy, and when the corrosion resistance is high, 316L stainless steel is used. The cover 7 is made of 6061 aluminum alloy to reduce the overall weight of the electronic pressure controller.

[0035] Specifically, pressure sensor detection ports are left on the six sides of the hexagonal core seat 1. The pressure sensor 4 is compressed and sealed by the pressure block 3, the sensor pressing piece 5, the pressure sensor O-ring 19, and the copper column 6. This structure can effectively seal small molecule gases and prevent leakage. A control circuit 9 connected to the pressure sensor 4 and the proportional valve 2 is also provided in the cover 7. The control process of the control circuit 9 is existing technology and will not be repeated here. A nameplate 17 for recording product information is fixedly connected to the outer wall of the cover 7.

[0036] During use, the sample gas to be tested passes through the external pipeline through the air inlet adapter, the fire arrester gasket 10, and the fire arrester 11, first filters out the substances that affect the explosion, and then flows through the sample inlet pipeline and enters the proportional valve 2. The proportional valve 2 opens according to the circuit signal, and the sample gas flows out to the gas path fork and is divided into two paths. One path enters the pressure detection channel 22 and detects the pressure through the pressure detector. The pressure signal is transmitted to the circuit, and the proportional valve 2 is controlled by the program to adjust the opening; the other path enters the sample outlet channel, passes through the fire arrester 11 and the fire arrester gasket 10 at the air outlet, and is connected to the outlet adapter with the external pipeline to enter the next level of detection equipment.

[0037] This explosion-proof electronic pressure controller can simultaneously regulate and control six-way sample gas, improving the detection efficiency of the analyzer, and can also regulate and control the sample gas pressure in steps.

[0038] The present invention has a compact structure, high integration, relatively small size, simple processing, and convenient maintenance, and saves a lot of space for the integrated maintenance of modules with more than three channels.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An explosion-proof multi-channel high-efficiency electronic pressure controller, characterized in that: It comprises a hexagonal core seat (1) and a cover shell (7), wherein the cover shell (7) is connected to the side wall of the hexagonal core seat (1), and the hexagonal core seat (1) and the cover shell (7) adopt a flameproof threaded joint surface and are sealed by a compression sealing O-ring (8); The hexagonal core seat (1) has six air inlets on its back, and the inlets are provided with a first mounting hole for mounting a fire arrester (11), a fire arrester sealing gasket (10) and an air inlet adapter. The hexagonal core seat (1) is provided with an injection channel (20) connected to the air inlet adapter (12) to form six mutually unconnected flow path inlets; the fire arrester is sintered and formed from a 316L stainless steel mesh with a filtration accuracy of 60 meshes, ensuring that too much resistance is not formed and can effectively prevent an explosion from occurring in the electronic pressure controller and spreading to the outside of the controller; The bottom surface of the hexagonal core seat (1) has six air outlets, and the outlet is provided with a second mounting hole for connecting with the fire arrester (11) and the fire arrester sealing gasket (10), and the second mounting hole is also connected with the air outlet adapter and the long adapter (13), and the hexagonal core seat (1) is provided with a sample outlet channel (21) connected with the air outlet adapter to form six mutually unconnected flow outlets; the back surface of the hexagonal core seat (1) has two explosion-proof clamping nuts (16), gaskets (15), and cable sealing rings (14) for clamping external inlet and outlet cables to meet explosion-proof sealing requirements; the six inlet channels and six outlet channels in the hexagonal core seat (1) are not connected to each other, and six pressure detection channels (22) are provided, and each pressure detection channel (22) is respectively connected to each outlet channel (21), and is connected to the external pipeline through the air outlet fire arrester and the air outlet adapter; The six sides of the hexagonal core seat (1) are provided with threaded holes for mounting the proportional valve and holes for sealing the gas path with the proportional valve O-ring (18). The proportional valve (2) and the proportional valve O-ring (18) are locked and sealed with a locking screw to achieve the gas path opening adjustment and sealing functions; The six sides of the hexagonal core seat (1) are provided with pressure sensor detection ports, and the pressure sensor (4) is compressed and sealed by the pressure block (3), the sensor pressing piece (5), the pressure sensor O-ring (19), and the copper column (6). This structure can effectively seal small molecule gases and prevent leakage.

2. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 1 is characterized in that: The fire arrester sealing gasket (10) is made of PTFE and is used to compress the fire arrester (11) through the air inlet adapter and the air outlet adapter, thereby sealing the air inlet and outlet.

3. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 1 is characterized in that: The air inlet adapter and the air outlet adapter are both threaded and made of 316L stainless steel. Their hardness will not cause leakage due to damage to the threads caused by replacing the external connecting pipes.

4. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 1 is characterized in that: The hexagonal core seat (1) is made of different materials according to different requirements to control costs. When the hexagonal core seat (1) is low-corrosive, it is made of 6061 aluminum alloy, and when the hexagonal core seat is highly corrosive, it is made of 316L stainless steel. The cover (7) is made of 6061 aluminum alloy to reduce the overall weight of the electronic pressure controller.

5. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 1 is characterized in that: A control circuit (9) connected to the pressure sensor (4) and the proportional valve (2) is also provided in the housing (7), and a nameplate (17) for recording product information is fixedly connected to the outer wall of the housing (7).

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