Explosion-proof multi-channel efficient electronic pressure controller

Abstract

The invention discloses an explosion-proof multi-channel high-efficiency electronic pressure controller, which comprises a hexagonal core seat and a housing, the housing is connected to the side wall of the hexagonal core seat, and the hexagonal core seat and the housing adopt an explosion-proof threaded joint surface and press a sealing O-shaped ring for sealing; six paths of air inlets are formed in the back surface of the hexagonal core seat, first mounting holes are formed in the inlets and are used for mounting a fire retardant device, a fire retardant device sealing gasket and an air inlet adapter, a sample introduction channel connected with the air inlet adapter is formed in the hexagonal core seat, and six paths of flow path inlets which are not connected with one another are formed in the hexagonal core seat. The device is compact in structure, high in integration level, relatively small in size, easy to machine and convenient to maintain, a large amount of space is saved for integrated maintenance of modules with more than three channels, six-channel sample gas can be adjusted and controlled at the same time, the detection efficiency of an analyzer is improved, and sample gas pressure can be adjusted and controlled step by step.

Description

Technical Field

[0001] The 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 each sample gas 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. The display scale of mechanical valves was not accurate enough, which would lead to pressure deviation and abnormal data. In addition, the manual method required adjusting and observing the pressure value at the same time, which was cumbersome and caused large human errors.

[0004] Later, due to technological progress, an electronic pressure control system (EPC) that automatically adjusts pressure was developed based on manual adjustment. In the early days, one-way pressure adjustment control was a group. With the improvement of instrument performance, most of the three-way pressure adjustment control is now a group. Although multi-way adjustment control can be realized in application, when it comes to multiple demands for multi-channel pressure control, four or more EPC modules are often required, especially explosion-proof EPC modules. A three-way explosion-proof EPC module is not small in size and occupies a large internal integration space of the analyzer. If there are four or more groups, it will have an adverse effect on the size and internal integration of the analyzer, and later maintenance, and increase the volume, weight, and transportation cost of the analyzer, as well as the disadvantages when competing with analyzers of other brands. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot 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, which 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.

[0008] In order 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 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 inlets are provided with a first mounting hole for mounting 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 flow path inlets that are not connected to each other; The bottom surface of the hexagonal core seat has six air outlets, and the outlet is provided with a second mounting hole for connecting with the fire-blocking device and the fire-blocking device sealing gasket, and the second mounting hole is also connected with an air outlet adapter and a long adapter, and the hexagonal core seat is provided with a sample outlet channel connected with the air outlet adapter to form six flow outlets that are not connected to each other; 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 of the proportional valve. The proportional valve and the O-ring of the proportional valve are locked and sealed with locking screws to achieve the functions of adjusting the opening of the gas path and sealing. 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 sheet, a pressure sensor O-ring and a copper column.

[0009] 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.

[0010] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the six-way sample inlet channels and the six-way sample 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 connected to each sample outlet channel respectively, and is connected to the external pipeline through the air outlet flame arrester and the air outlet adapter.

[0011] 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.

[0012] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, the fire-blocking device sealing gasket is made of PTFE material, and the inlet and outlet are sealed while the fire-blocking device is compressed by the air inlet adapter and the air outlet adapter.

[0013] 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 cause leakage due to replacement of external connecting pipelines.

[0014] As a preferred solution of the explosion-proof multi-channel high-efficiency electronic pressure controller described in the present invention, wherein: the hexagonal core seat material is 6061 aluminum alloy or 316L stainless steel; the cover shell is 6061 aluminum alloy.

[0015] 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 arranged in the housing, and a nameplate for recording product information is fixedly connected to the outer wall of the housing.

[0016] The beneficial effects of the present invention are as follows: the present invention has a compact structure, a high degree of integration, a relatively small volume, simple processing, and convenient maintenance. The integrated maintenance of modules with more than three channels saves a lot of space, and six-channel sample gas regulation and control can be performed simultaneously to improve the detection efficiency of the analyzer. The sample gas pressure regulation and control can also be performed in steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is a schematic diagram of the overall structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0018] Figure 2 It is a schematic diagram of the back structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the explosion-proof multi-channel high-efficiency electronic pressure controller of the present invention.

[0020] Figure 4 It 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.

[0021] Figure 5 It 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

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and 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.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] 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 a compression sealing O-ring 8 for sealing; 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-blocking device 11, the fire-blocking device 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 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; 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, 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. 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-way pressure detection channels 22 are provided, and each pressure detection channel 22 is respectively connected with each sample outlet channel 21, and is connected to each sample outlet channel 21 through the air outlet fire arrester and the air outlet. The air inlet adapter is connected to the external pipeline, the fire-blocking device is sintered 316L stainless steel mesh with a filtration accuracy of 60 meshes, which ensures that not too much resistance is formed and can effectively prevent explosions in the electronic pressure controller from spreading to the outside of the controller. The fire-blocking device sealing gasket 10 is made of PTFE material. The air inlet adapter and the air outlet adapter are used to press the fire-blocking device 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.

[0027] Furthermore, threaded holes for mounting proportional valves and proportional valve O-rings 18 for sealing gas path holes are reserved on the six sides of the hexagonal core seat 1. The proportional valve 2 and the proportional valve O-ring 18 are locked and sealed with locking screws to achieve the gas path opening adjustment and sealing functions. The hexagonal core seat 1 selects different materials according to different needs to control costs. When the corrosion is low, the hexagonal core seat 1 uses 6061 aluminum alloy, and when the corrosion is strong, 316L stainless steel is used. The cover 7 is 6061 aluminum alloy to reduce the overall weight of the electronic pressure controller.

[0028] Specifically, 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 provide a good seal for small molecule gases to prevent leakage. Among them, a control circuit 9 connected to the pressure sensor 4 and the proportional valve 2 is also provided in the cover shell 7. The control process of the control circuit 9 is the 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 shell 7.

[0029] During use, the sample gas to be tested passes through the external pipeline through the air inlet adapter, the fire arrester sealing pad 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 to detect the pressure through the pressure detector, and 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 sealing pad 10 at the air outlet, and the outlet adapter is connected to the external pipeline to enter the next level of detection equipment.

[0030] This explosion-proof electronic pressure controller can simultaneously regulate and control six-way sample gas to improve the detection efficiency of the analyzer, and can also regulate and control the sample gas pressure in steps.

[0031] The present invention has a compact structure, a high degree of integration, a relatively small volume, simple processing, and convenient maintenance, and saves a lot of space for the integrated maintenance of modules with more than three channels.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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 the back side, 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, and the hexagonal core seat (1) is provided with an injection channel (20) connected to the air inlet adapter (12) to form six flow path inlets that are not connected to each other; The bottom surface of the hexagonal core seat (1) has six air outlets, the outlets are 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 an air outlet adapter and a 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 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 locking screws to achieve the functions of adjusting the opening of the gas path and sealing. 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 means of a pressure block (3), a sensor pressing sheet (5), a pressure sensor O-ring (19), and a copper column (6).

2. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 1 is characterized in that: The back side of the hexagonal core seat (1) is provided with two explosion-proof clamping nuts (16), gaskets (15), and cable sealing rings (14), which are used to clamp external inlet and outlet cables to achieve explosion-proof sealing requirements.

3. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 2 is characterized in that: The six sample inlet channels and the six 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 connected to each sample outlet channel (21) respectively, and is connected to an external pipeline via an outlet flame arrester and an outlet adapter.

4. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 3 is characterized in that: The fire-blocking device is formed by sintering a 316L stainless steel mesh, and the filtering accuracy is 60 meshes.

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

6. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 5 is characterized in that: 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 leaks will not occur due to replacement of external connecting pipes.

7. The explosion-proof multi-channel high-efficiency electronic pressure controller according to claim 5 is characterized in that: The hexagonal core seat (1) is made of 6061 aluminum alloy or 316L stainless steel; the cover shell (7) is made of 6061 aluminum alloy.

8. 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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