Explosion-proof efficient electronic pressure controller

Abstract

The utility model discloses an explosion-proof high-efficiency electronic pressure controller, which is characterized in that fire-retardant sheets are arranged at an inlet and an outlet of sample gas, so that explosion in a valve body can be effectively prevented; the combination of the proportional valves and the high-precision electronic pressure sensors is adopted, the gas pressure in a gas circuit is accurately controlled through circuit control, three gas inlets are formed in the valve body, the gas passes through three groups of independent gas circuits in the valve body, passes through different proportional valves and pressure sensors respectively, and then is led into an external pipeline through different gas outlets, so that the gas pressure in the gas circuit is accurately controlled. The purpose that three paths of gas can be controlled at the same time and do not affect one another is achieved, the purpose of automatic pressure adjustment is achieved, it is guaranteed that instrument detection is high in accuracy and good in repeatability, and the detection efficiency can be greatly improved; due to the fact that the proportional valve is installed in the reserved installation groove position of the valve body, space is greatly saved, the weight of the valve body is reduced, and the electronic pressure controller has the advantages of being compact in overall structure, small in size, low in maintenance amount, flexible and changeable in application and the like.

Description

Technical Field

[0001] The utility model relates to the technical field related to gas pressure control, and in particular to an explosion-proof and efficient electronic pressure controller. Background Art

[0002] Since the emergence of gas chromatography, continuous and stable injection and carrier gas purge have always been a hot topic. Since gas chromatography will separate different components in the sample gas according to their different characteristics, they will be identified and quantified by the back-end detector. In this process, in order to meet the equilibrium conditions, the sample entry and carrier gas purge must maintain a high degree of stability, so that the measured data can be highly repeatable and the authenticity of the data can be guaranteed.

[0003] In the prior art, most of the pressure consistency is controlled by manually adjusting valves. However, due to the insufficient precision of the pressure display scale, there is a certain pressure deviation in the pressure value, which in turn causes a certain deviation in the injection and purge, resulting in data abnormalities. Moreover, the manual method requires adjusting the valve while observing the pressure value, which is cumbersome and prone to human error. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, in order to solve the above technical problems, the utility model provides the following technical solutions: an explosion-proof and efficient electronic pressure controller, mainly comprising a valve body, a circuit board, a pressure sensor and a proportional valve;

[0006] The valve body is provided with three-way valve body gas circuit inlets and three-way valve body gas circuit outlets, and each valve body gas circuit inlet and valve body gas circuit outlet is installed with a threaded adapter for connecting to an external gas circuit;

[0007] The pressure sensor and the proportional valve are both built into the valve body. The pressure sensor and the proportional valve are electrically connected to the circuit board. The circuit board is fixed to the valve body through a brass stud. The pressure sensor converts the detected pressure data into an electrical signal to the circuit board, thereby determining whether to adjust the opening of the proportional valve;

[0008] The valve body is also provided with three independent in-valve gas circuits. After the sample gas or carrier gas passes through and enters the corresponding in-valve gas circuit through the corresponding valve body gas circuit inlet, it passes through different proportional valves and pressure sensors respectively, and then enters the external pipeline through different valve body gas circuit outlets. The pressure sensor converts the detected pressure data into an electrical signal to the circuit board, so as to determine whether to adjust the opening of the proportional valve. At the same time, the gas is discharged to the outside of the valve body through the valve body gas circuit outlet.

[0009] As a preferred solution of the explosion-proof and efficient electronic pressure controller described in the utility model, each independent valve body inlet gas circuit is connected to one of the valve body gas circuit inlets, the valve body gas circuit is connected to the air inlet of the proportional valve, the sample gas or carrier gas enters the valve body through one of the valve body gas circuit inlets, passes through the valve body gas circuit and enters the proportional valve, the gas discharged from the gas outlet of the proportional valve is divided into two streams, one of which is connected to the air inlet of the pressure sensor detection end, the pressure sensor converts the detected pressure data into an electrical signal to the circuit board, so as to determine whether to adjust the opening of the proportional valve, and the other is discharged to the outside of the valve body through the valve body gas circuit outlet connected to the above-mentioned valve body gas circuit inlet.

[0010] As a preferred solution of the explosion-proof and efficient electronic pressure controller described in the utility model, the valve body is made of 6061 aluminum alloy or 316 stainless steel according to different requirements. If it is non-corrosive, 6061 aluminum alloy can be used for the valve body, and if it is corrosive, 316L stainless steel can be used.

[0011] As a preferred solution of the explosion-proof high-efficiency electronic pressure controller described in the utility model, the material of the threaded adapter is preferably 316 stainless steel to ensure its strength and prevent leakage due to damage to the thread due to frequent replacement of the external gas path.

[0012] As a preferred solution of the explosion-proof high-efficiency electronic pressure controller described in the utility model, the threaded adapter is connected with a fire-blocking sealing column, and is sealed to the valve body through the fire-blocking sealing column, and the fire-blocking sealing column is made of tetrafluoroethylene PTFE.

[0013] As a preferred solution of the explosion-proof and efficient electronic pressure controller described in the utility model, a fire barrier plate for filtering impurities is arranged on the inner side of each threaded adapter. The fire barrier plate is sintered from a stainless steel mesh with a filtering accuracy of mesh, ensuring that not too much resistance is formed and that sparks will not enter the valve body.

[0014] As a preferred solution of the explosion-proof and efficient electronic pressure controller described in the utility model, wherein: an installation slot and an air path hole for a pressure sensor are reserved in the valve body, the pressure sensor is pressed into the valve body through a sensor cover plate, and is sealed by a sensor sealing O-ring; the sensor cover plate of the pressure sensor is made of Peek material, which has a relatively high hardness and presses the pressure sensor, ensuring its sealing while having insulation properties, and will not cause a short circuit between the circuit board and the pressure sensor.

[0015] As a preferred solution of the explosion-proof and efficient electronic pressure controller described in the utility model, an installation slot and an air path hole for installing a proportional valve are reserved in the valve body, the proportional valve is locked by a fixing screw and sealed by an O-ring of the proportional valve, and can be used directly without the need for an additional guide plate.

[0016] As a preferred solution of the explosion-proof high-efficiency electronic pressure controller described in the utility model, a valve cover is connected to the valve body through a flameproof thread, and a valve cover sealing O-ring is arranged at the connection between the valve body and the valve cover. When maintenance is required, the equipment is powered off and the valve cover is unscrewed for operation. The valve cover is preferably made of 6061 aluminum alloy to ensure its overall lightness.

[0017] As a preferred solution of the explosion-proof high-efficiency electronic pressure controller described in the utility model, a valve seat is fixed to the other end of the valve body by a fastener, and a mounting hole for fixing the valve body is reserved on one side of the valve seat.

[0018] As a preferred solution of the explosion-proof and efficient electronic pressure controller described in the utility model, a cable inlet and outlet for installing inlet and outlet lines is opened on the side of the valve body. The electric pressure controller is connected to external equipment through the inlet and outlet lines, and the inlet and outlet lines use explosion-proof cables.

[0019] Beneficial effects of the utility model:

[0020] 1. The electronic pressure controller in the utility model is equipped with fire-blocking plates at the inlet and outlet of the sample gas, which can effectively prevent explosions in the valve body; the valve body and the valve cover adopt flameproof threaded seals, and the valve body and the valve cover meet the explosion-proof performance requirements, ensuring that even if there is an explosion inside the valve body, it will not affect other equipment in the explosion area.

[0021] 2. The electronic pressure controller in the utility model adopts a combination of a proportional valve and a high-precision electronic pressure sensor to realize precise control of the gas pressure in the gas circuit through circuit control. There are three air inlets on the valve body. Through three independent sets of valve body air circuits inside it, they pass through different proportional valves and pressure sensors respectively, and then enter the external pipeline through different air outlets, so that the three-way gas can be controlled simultaneously without affecting each other, and the purpose of automatically adjusting the pressure is achieved, ensuring high accuracy and good repeatability of instrument detection, which can greatly improve the detection efficiency.

[0022] 3. The electronic pressure controller in the utility model, since the proportional valve is installed in the reserved installation slot of the valve body, it greatly saves space and also achieves the purpose of reducing the weight of the valve body, so that the electronic pressure controller has the advantages of compact overall structure, small size, low maintenance, flexible and changeable application, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a side structural schematic diagram of the utility model.

[0026] Figure 3 It is a schematic diagram of the structure of the utility model when viewed from above.

[0027] Figure 4 It is a schematic cross-sectional structural diagram of a valve body gas path inlet and a valve body gas path outlet of one path of the utility model.

[0028] Figure 5 The utility model is a schematic cross-sectional structure diagram of a gas path in a valve body.

[0029] In the figure: 100, valve body; 101, valve body gas path inlet; 1011, threaded adapter; 1012, fire-blocking sealing column; 1013, fire-blocking plate; 102, cable inlet and outlet; 103, valve body gas path outlet; 104, valve body gas path; 105, valve cover; 1051, valve cover sealing O-ring; 106, valve seat;

[0030] 200. Circuit board;

[0031] 300, pressure sensor; 301, sensor cover; 302, sensor sealing O-ring;

[0032] 400, proportional valve; 401, proportional valve sealing O-ring. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, 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.

[0034] 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.

[0035] 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.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, 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.

[0037] Reference Figures 1 to 5 , is an embodiment of the utility model, which provides an explosion-proof and efficient electronic pressure controller, mainly including a valve body 100, a circuit board 200, a pressure sensor 300 and a proportional valve 400;

[0038] The valve body 100 is made of 6061 aluminum alloy or 316 stainless steel according to different requirements; the valve body 100 is provided with a three-way valve body gas path inlet 101 and a three-way valve body gas path outlet 103, and each valve body gas path inlet 101 and valve body gas path outlet 103 is installed with a threaded adapter 1011 for connecting to an external gas path; the material of the threaded adapter 1011 is preferably 316 stainless steel to ensure its strength and prevent the thread from being damaged due to frequent replacement of the external gas path and leakage occurs; the threaded adapter 1011 is connected to a fire-blocking sealing column 1012, and is sealed to the valve body 100 through the fire-blocking sealing column 1012, and the fire-blocking sealing column 1012 is made of tetrafluoroethylene PTFE; the inner side of each threaded adapter 1011 is arranged with a fire-blocking plate 1013 for filtering impurities, and the fire-blocking plate 1013 is sintered into a 316 stainless steel mesh with a filtration accuracy of 60 meshes, which ensures that not too much resistance is formed and at the same time ensures that sparks will not enter the valve body 100.

[0039] A cable inlet and outlet 102 for installing inlet and outlet lines is provided on the side of the valve body 100. The electric pressure controller is connected to external equipment through the inlet and outlet lines, and the inlet and outlet lines use explosion-proof cables; a valve cover 105 is connected to the valve body 100 through explosion-proof threads, and a valve cover sealing O-ring 1051 is arranged at the connection between the valve body 100 and the valve cover 105. When maintenance is required, the equipment is powered off and the valve cover 105 is unscrewed for operation. The valve cover 105 is preferably made of 6061 aluminum alloy to ensure its overall lightness; a valve seat 106 is fixed to the other end of the valve body 100 by fasteners, and a mounting hole for fixing the valve body 100 is reserved on one side of the valve seat 106.

[0040] The pressure sensor 300 and the proportional valve 400 are both built into the valve body 100. The pressure sensor 300 and the proportional valve 400 are electrically connected to the circuit board 200. The circuit board 200 is fixed in the valve body 100 by a brass stud. The pressure sensor 300 converts the detected pressure data into an electrical signal to the circuit board 200, so as to determine whether to adjust the opening of the proportional valve 400. The valve body 100 is provided with a mounting slot and an air path hole for the pressure sensor 300. The pressure sensor 300 is pressed against the valve body 100 by a sensor cover 301. The sensor cover 301 of the pressure sensor 300 is made of Peek material and has a relatively high hardness, which presses the pressure sensor 300 tightly, ensuring its sealing and insulating properties, and will not cause a short circuit between the circuit board 200 and the pressure sensor 300. The valve body 100 is provided with a mounting slot and an air path hole for installing the proportional valve 400. The proportional valve 400 is locked by fixing screws and sealed by the proportional valve sealing O-ring 4011. It can be used directly without the need for an additional guide plate.

[0041] Three independent in-valve gas paths 104 are arranged in the valve body 100, each of which is connected to one of the valve body gas path inlets 101, and the valve body gas path 104 is connected to the air inlet of the proportional valve 400. The sample gas or carrier gas enters the valve body 100 through one of the valve body gas path inlets 101, is filtered by the fire barrier 1013, and then enters the proportional valve 400 through one of the independent in-valve gas paths 104. The gas discharged from the gas outlet of the proportional valve 400 is divided into two streams, one of which is connected to the air inlet of the detection end of the pressure sensor 300. The pressure sensor 300 converts the detected pressure data into an electrical signal to the circuit board 200, so as to determine whether to adjust the opening of the proportional valve 400. The other stream is filtered out impurities that may affect the safety of the rear-end gas path through the fire barrier 1013, and then is discharged to the external gas path through the threaded adapter 1011 on the corresponding valve body gas path outlet 103.

[0042] In this embodiment: because the electronic pressure controller is equipped with fire-blocking plates 1013 at the inlet and outlet of the sample gas, explosions in the valve body 100 can be effectively prevented; the valve body 100 and the valve cover 105 use flameproof threaded seals, and the valve body 100 and the valve cover 105 meet the explosion-proof performance requirements, ensuring that even if an explosion occurs inside the valve body 100, it will not affect other equipment in the explosion area.

[0043] The combination of a proportional valve 400 and a high-precision electronic pressure sensor 300 is used for circuit control to achieve precise control of the gas pressure in the gas circuit. The valve body 100 has three air inlets. The three independent valve body air circuits 104 inside the valve body pass through different proportional valves 400 and pressure sensors 300 respectively, and then enter the external pipeline through different air outlets, so that the three-way gas can be controlled simultaneously without affecting each other, and the purpose of automatically adjusting the pressure is achieved, ensuring that the instrument detection has high accuracy and good repeatability, which can greatly improve the detection efficiency.

[0044] Since the proportional valve 400 is installed in the reserved installation slot of the valve body 100, it greatly saves space and also achieves the purpose of reducing the weight of the valve body 100, so that the electronic pressure controller has the advantages of compact overall structure, small size, low maintenance, flexible application, etc.

[0045] It is worth noting that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An explosion-proof and efficient electronic pressure controller, characterized in that: It mainly comprises a valve body (100), a circuit board (200), a pressure sensor (300) and a proportional valve (400); The valve body (100) is provided with three-way valve body gas circuit inlets (101) and three-way valve body gas circuit outlets (103), and each of the valve body gas circuit inlets (101) and valve body gas circuit outlets (103) is installed with a threaded adapter (1011) for connecting to an external gas circuit; The pressure sensor (300) and the proportional valve (400) are both built into the valve body (100); the pressure sensor (300) and the proportional valve (400) are electrically connected to the circuit board (200); and the circuit board (200) is fixed in the valve body (100) via a brass stud; The valve body (100) is also provided with three independent valve body gas paths (104). After the sample gas or carrier gas passes through the corresponding valve body gas path inlet (101) and enters the corresponding valve body gas path (104), it passes through different proportional valves (400) and pressure sensors (300) respectively, and then enters the external pipeline through different valve body gas path outlets (103). The pressure sensor (300) converts the detected pressure data into an electrical signal to the circuit board (200), so as to determine whether to adjust the opening of the proportional valve (400). At the same time, the gas is discharged to the outside of the valve body (100) through the valve body gas path outlet (103).

2. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: Each independent valve body internal gas path (104) is connected to one of the valve body gas path inlets (101), and the valve body gas path (104) is connected to the gas inlet of the proportional valve (400). The sample gas or carrier gas enters the valve body (100) through one of the valve body gas path inlets (101), passes through the valve body internal gas path (104) and enters the proportional valve (400). The gas discharged from the gas outlet of the proportional valve (400) is divided into two streams, one of which is connected to the gas inlet of the detection end of the pressure sensor (300). The pressure sensor (300) converts the detected pressure data into an electrical signal to the circuit board (200), so as to determine whether to adjust the opening of the proportional valve (400). The other stream is discharged to the outside of the valve body (100) through the valve body gas path outlet (103) connected to the valve body gas path inlet (101).

3. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: The threaded adapter (1011) is connected to a fire-blocking sealing column (1012) and is sealedly connected to the valve body (100) via the fire-blocking sealing column (1012).

4. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: A fire barrier sheet (1013) for filtering impurities is arranged on the inner side of each threaded adapter (1011), and the fire barrier sheet (1013) is formed by sintering a stainless steel mesh.

5. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: The valve body (100) is provided with a mounting slot and an air path hole for the pressure sensor (300). The pressure sensor (300) is pressed into the valve body (100) through a sensor cover plate (301) and is sealed by a sensor sealing O-ring (302).

6. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: An installation slot and an air path hole for installing a proportional valve (400) are reserved in the valve body (100). The proportional valve (400) is locked by a fixing screw and sealed by a proportional valve sealing O-ring (401).

7. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: A valve cover (105) is threadedly connected to the valve body (100), and a valve cover sealing O-ring (1051) is arranged at the connection between the valve body (100) and the valve cover (105).

8. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: The other end of the valve body (100) is fixed with a valve seat (106) via a fastener, and a mounting hole for fixing the valve body (100) is reserved on one side of the valve seat (106).

9. The explosion-proof high-efficiency electronic pressure controller according to claim 1, characterized in that: A cable inlet and outlet (102) for installing an inlet and outlet line is provided on the side of the valve body (100). The electronic pressure controller is connected to an external device via the inlet and outlet line, and the inlet and outlet line adopts an explosion-proof cable.

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