Open type light path gas detection device

Abstract

The utility model relates to an open type light path gas detection device, which belongs to the field of gas detection, and comprises a control box, a detection bottom plate mounted on the top surface of the control box, a light reflecting plate arranged opposite to the detection bottom plate, and a supporting structure connected with the detection bottom plate and the light reflecting plate, the control box is provided with an infrared transmitter and an infrared receiver; the detection bottom plate is provided with an emission through hole which is used for infrared light to pass through and is right opposite to the infrared emitter and a receiving through hole which is used for infrared light to pass through and is right opposite to the infrared receiver. According to the invention, the light path gas detection process is relatively convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas detection, in particular to an open optical path gas detection device. BACKGROUND

[0002] The optical path gas detection technology is a method based on infrared spectrum analysis, which uses the absorption characteristics of gas to specific wavelength light to determine the concentration of gas by analyzing the change of light signal, and has been widely used in many fields such as environmental detection, industrial safety, medical health, etc.

[0003] The absorption cell is a common optical path gas detection equipment. The absorption cell includes a rack, an infrared emitter mounted on the rack, an infrared receiver mounted on the rack, and a detection system mounted on the rack for analyzing infrared spectrum. The rack has a sealed chamber and a gas inlet in communication with the sealed chamber for inputting a detection gas sample. The infrared emitter and the infrared receiver are arranged in the sealed chamber. When detecting a specific gas concentration, the detection personnel need to collect the gas sample at a specific location, and input the gas sample into the sealed chamber through the gas inlet. Then, the infrared emitter is started, and the infrared light is received by the infrared receiver after passing through the gas sample in the sealed chamber. Since the specific wavelength light segment in the infrared light is absorbed by the gas sample, the detection system can analyze the concentration of the specific gas according to the data of the received infrared light. After the detection is completed, the operator needs to use a vacuum pump to evacuate the sealed chamber of the absorption cell to avoid the influence of the residual gas sample on the detection accuracy of the next time.

[0004] For the related technology in the above, the inventors believe that the process of using the absorption cell for optical path gas detection is cumbersome. UTILITY MODEL CONTENT

[0005] In order to improve the problem that the process of using the absorption cell for optical path gas detection is cumbersome, the present application provides an open optical path gas detection device.

[0006] The open optical path gas detection device provided by the present application adopts the following technical scheme:

[0007] An open optical path gas detection device, comprising a control box, a detection bottom plate mounted on the top surface of the control box, a reflecting plate arranged opposite to the detection bottom plate, a support structure connecting the detection bottom plate and the reflecting plate; the control box is provided with an infrared emitter and an infrared receiver; the detection bottom plate is provided with a transmission through hole for the infrared light to pass through and opposite to the infrared emitter, and a receiving through hole for the infrared light to pass through and opposite to the infrared receiver.

[0008] By adopting the technical scheme, the infrared emitter can emit infrared light to the reflecting plate, the reflecting plate reflects the infrared light to the infrared receiver in the control box, the infrared light contacts the detected gas in the emitting and reflecting path, part of the infrared light is absorbed by the gas, and the infrared light received by the infrared receiver is in an attenuation state, so that the open optical path gas detection device can detect the concentration information of the detected gas. The reflecting plate and the detection base plate are connected through the support structure, the support structure is in an open environment with the emitting path and the reflecting path of the infrared light, and a gas sample does not need to be collected separately. Compared with optical path gas detection using an absorption cell, optical path gas detection by the open optical path gas detection device helps to reduce the operation process of optical path gas detection.

[0009] Optionally, the support structure includes a plurality of support columns, one end of the support column is fixedly connected to the reflecting plate, and the other end is fixedly connected to the detection base plate.

[0010] By adopting the technical scheme, the specific structure of the support structure is disclosed, and the plurality of support columns help to ensure the connection strength between the reflecting plate and the detection base plate.

[0011] Optionally, the support structure includes a fixed frame fixedly installed on the detection base plate and a movable frame fixedly installed on the reflecting plate and slidingly arranged on the fixed frame; the fixed frame includes a fixed plate parallel to the detection base plate, a plurality of fixed columns fixedly connected to the detection base plate and the fixed plate; the movable frame includes a movable plate parallel to the detection base plate, a plurality of movable columns fixedly connected to the reflecting plate and the movable plate; the fixed frame has a sliding hole for the movable column to slide; the fixed plate has a fixed hole for the detected infrared light to pass through; and the movable plate has a movable hole for the detected infrared light to pass through.

[0012] By adopting the technical scheme, another specific structure of the support structure is disclosed, the support structure includes the fixed frame and the movable frame, and the movable frame can be slidingly installed on the fixed frame, so that the support structure has an extended state and a contracted state, thereby facilitating storage and transportation of the open optical path gas detection device.

[0013] Optionally, a bottom surface of the fixed plate is provided with an arrangement groove for arranging the movable plate; when the movable plate is arranged in the arrangement groove, the bottom surface of the movable plate is flush with the bottom surface of the fixed plate.

[0014] By adopting the technical scheme, when the movable plate is arranged in the arrangement groove of the fixed plate, the support structure is in the extended state, and the arrangement of the movable plate and the arrangement groove helps to improve the stability of the support structure in the extended state.

[0015] Optionally, the fixed plate is provided with a rotating through-hole penetrating through the upper and lower surfaces, and a locking assembly is rotatably installed at the rotating through-hole, the locking assembly comprising a rotating shaft rotatably arranged in the rotating through-hole, a locking piece connected to the bottom plate of the rotating shaft, and a rotating knob installed on the upper end of the rotating shaft; the locking piece can abut against the bottom surface of the movable plate located in the arrangement groove after being rotated.

[0016] By adopting the above technical scheme, a locking assembly is provided and the structure of the locking assembly is disclosed; when the support structure is in the stretched state, i.e., the movable plate is embedded in the arrangement groove of the fixed plate, the locking piece can abut against the bottom surface of the movable plate by rotating the rotating knob, so that the locking of the fixed plate and the movable plate is realized, which helps to improve the stability of the support structure in the stretched state.

[0017] Optionally, the fixed plate is provided with at least two groups of the locking assembly.

[0018] By adopting the above technical scheme, the fixed plate and the movable plate are locked by using two locking assemblies, which further improves the stability of the support structure in the stretched state.

[0019] Optionally, the top surface of the detection bottom plate is provided with a positioning groove for arranging the movable plate; the inner wall of the positioning groove is provided with a mounting hole, and a ball head spring plunger is installed at the mounting hole; the side surface of the movable plate is provided with a positioning hole for clamping the plunger ball of the ball head spring plunger.

[0020] By adopting the above technical scheme, when the movable plate is arranged in the positioning groove of the detection bottom plate, the support structure is in the contracted state, and the plunger ball of the ball head spring plunger can be clamped in the positioning hole of the movable plate, which helps to improve the stability of the support structure in the contracted state.

[0021] Optionally, when the movable plate is arranged in the positioning groove, the top surface of the fixed plate is attached to the bottom surface of the light reflection plate.

[0022] By adopting the above technical scheme, the close attachment of the fixed plate to the bottom surface of the light reflection plate can protect the light reflection plate in the contracted state of the support structure, thereby providing effective protection for the light reflection plate of the open-path gas detection device during storage and transportation.

[0023] Optionally, the top surface of the fixed plate is provided with a first rubber pad.

[0024] By adopting the above technical scheme, when the support structure is in the contracted state, the first rubber pad abuts against the bottom surface of the light reflection plate, and since the rubber pad has good elasticity, it helps to reduce the probability of scratching the light reflection plate.

[0025] Optionally, the fixing plate is detachably provided with a dustproof plug, the dustproof plug comprising a dustproof plate and a dustproof ring connected to the dustproof plate and matched with the fixing hole.

[0026] By adopting the above technical scheme, when the support structure is in the contracted state, the dustproof plug is installed at the fixing hole of the fixing plate, so that the bottom surface of the reflecting plate is covered, and the probability of dust adsorbing on the bottom surface of the reflecting plate is reduced.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. An open optical path gas detection device, by precise cooperation of the support structure, the infrared emitter and the infrared receiver, simple gas detection operation is realized, the cumbersome steps of using an absorption cell for gas detection are avoided, the operation complexity is reduced, and the detection efficiency is improved.

[0029] 2. By the sliding cooperation of the fixed frame and the movable frame, the support structure has the functions of stretching and contracting, and the space occupancy rate of the optical path gas detection device during storage and transportation is reduced.

[0030] 3. By installing the locking assembly on the fixing plate, when the movable plate is arranged in the arrangement slot of the fixing plate, the locking assembly can lock the movable plate, which helps to improve the stability of the support structure in the stretched state; by installing the ball head spring plunger on the arrangement slot of the detection bottom plate and arranging the positioning hole in the side wall of the movable plate, when the movable plate is arranged in the positioning slot of the detection bottom plate, the plunger ball is clamped in the positioning hole of the movable plate, which helps to improve the stability of the support structure in the contracted state. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the open optical path gas detection device in embodiment 1 of the present application.

[0032] Figure 2 is a cross-sectional view of the control box and the detection bottom plate in embodiment 1 of the present application.

[0033] Figure 3 is a cooperation cross-sectional view of the infrared emitter, the first sleeve and the first support seat in embodiment 1 of the present application.

[0034] Figure 4 is a cooperation cross-sectional view of the infrared receiver, the second sleeve and the second support seat in embodiment 1 of the present application.

[0035] Figure 5 is Figure 1 is a local enlarged view of A in FIG.

[0036] Figure 6is a structural schematic diagram of the open optical path gas detection device in Embodiment 2 of the present application.

[0037] Figure 7 is Figure 6 is a partial enlarged schematic diagram at B in FIG. 1.

[0038] Figure 8 is a structural schematic diagram of the movable plate arranged in the arrangement slot of the fixed plate in Embodiment 2 of the present application.

[0039] Figure 9 is a sectional schematic diagram of the locking assembly in Embodiment 2 of the present application.

[0040] Figure 10 is a sectional schematic diagram of the movable plate arranged in the positioning slot of the detection bottom plate in Embodiment 2 of the present application.

[0041] Figure 11 is Figure 10 is a partial enlarged schematic diagram at C in FIG. 1.

[0042] Figure 12 is a structural schematic diagram of the dustproof cover in Embodiment 2 of the present application.

[0043] BRIEF DESCRIPTION OF DRAWINGS 1, control box; 11, box body; 12, infrared emitter; 13, infrared receiver; 14, arrangement through hole; 15, first support seat; 16, first sleeve; 161, first stud; 162, first nut; 17, second support seat; 18, second sleeve; 181, second stud; 182, second nut; 2, detection bottom plate; 21, emission through hole; 22, receiving through hole; 23, positioning slot; 24, mounting hole; 25, ball head spring plunger; 251, plunger ball; 3, reflector plate; 31, metal plate; 32, light-reflecting layer; 4, support column; 5, fixed frame; 51, fixed plate; 511, fixed through hole; 512, sliding through hole; 52, fixed column; 53, arrangement slot; 54, rotation through hole; 55, rotation shaft; 56, locking piece; 561, third stud; 57, rotation tab; 571, fourth stud; 58, first rubber pad; 6, movable frame; 61, movable plate; 611, movable through hole; 612, positioning hole; 62, movable column; 7, dustproof plug; 71, dustproof plate; 72, dustproof ring. DETAILED DESCRIPTION

[0044] The present application is further described below in conjunction with the accompanying Figures 1-12 The present application is further described below in conjunction with the accompanying

[0045] The present application discloses an open optical path gas detection device.

[0046] Embodiment 1:

[0047] Reference Figure 1The utility model provides an open optical path gas detection device, which comprises a control box 1, a detection base plate 2 installed on the top of the control box 1, a reflecting plate 3 located above the detection base plate 2 and parallel to the detection base plate 2 and a support structure connecting the detection base plate 2 and the reflecting plate 3.

[0048] With reference to Figure 2 The control box 1 comprises a box body 11, a detection circuit arranged in the box body 11, an infrared emitter 12 connected with the detection circuit and an infrared receiver 13 connected with the detection circuit. A through hole 14 is arranged on the top surface of the control box 1 for the infrared light to emit out of and enter into the control box 1.

[0049] With reference to Figure 2 The first support seat 15, the first sleeve 16 rotatably installed on the first support seat 15 and used for fixing the infrared emitter 12, the second support seat 17 and the second sleeve 18 rotatably installed on the second support seat 17 and used for fixing the infrared receiver 13 are arranged in the control box 1. The infrared emitter 12 is threadedly connected with the first sleeve 16, and the infrared receiver 13 is threadedly connected with the second sleeve 18. In the embodiment, the axis of the first sleeve 16 and the axis of the second sleeve 18 are located in the same vertical plane. By adjusting the angle of the first sleeve 16 and the second sleeve 18, the inclination angle of the infrared emitter 12 and the infrared receiver 13 can be adjusted.

[0050] With reference to Figure 2 And Figure 3 The side wall of the first sleeve 16 is symmetrically provided with a first threaded stud 161, the first support seat 15 has a first through hole for arranging the first threaded stud 161, and the first threaded stud 161 is further provided with a first nut 162 for locking the first sleeve 16 on the first support seat 15.

[0051] With reference to Figure 2 And Figure 4 The side wall of the second sleeve 18 is symmetrically provided with a second threaded stud 181, the second support seat 17 has a second through hole for arranging the second threaded stud 181, and the second threaded stud 181 is further provided with a second nut 182 for locking the second sleeve 18 on the second support seat 17.

[0052] With reference to Figure 1 And Figure 2 The detection base plate 2 is fixed on the top of the control box 1 by screws. The detection base plate 2 is a square plate structure, and the detection base plate 2 comprises an emitting through hole 21 for the infrared light to pass through and opposite to the infrared emitter 12 and a receiving through hole 22 for the infrared light to pass through and opposite to the infrared receiver 13.

[0053] With reference to Figure 1 And Figure 5The reflecting plate 3 comprises a metal plate 31 and a reflecting layer 32 arranged on the bottom surface of the metal plate 31 and used for reflecting infrared light. The metal plate 31 is a square plate structure.

[0054] With reference to Figure 1 and Figure 5 The support structure comprises four support columns 4. The four support columns 4 are vertically arranged, and the bottom ends of the four support columns 4 are fixed at the four corners of the detection base plate 2 by screws respectively; the top ends of the four support columns 4 are fixed at the four corners of the metal plate 31 by screws respectively. The reflecting layer 32 has a through hole structure matched with the support columns 4.

[0055] With reference to Figures 1 to 5 The implementation principle of the open optical path gas detection device in the embodiment of the present application is as follows: the infrared emitter 12 emits infrared light to the reflecting plate 3, and the reflecting plate 3 reflects the infrared light to the infrared receiver 13. In the path of the infrared light emission and reflection, the infrared light contacts the detected gas, and part of the infrared light is absorbed by the gas, resulting in the attenuation of the infrared light, so that the open optical path gas detection device can detect the concentration information of the detected gas.

[0056] Embodiment 2

[0057] Compared with the open optical path gas detection device in the embodiment of the present application and the embodiment 1, the rest of the structures are the same as those in the embodiment 1, except the structure of the detection base plate 2 and the support structure.

[0058] With reference to Figure 6 The support structure in the embodiment comprises a fixed frame 5 and a movable frame 6 vertically and slidably installed on the fixed frame 5.

[0059] With reference to Figure 6 The fixed frame 5 is fixedly installed on the detection base plate 2. The fixed frame 5 comprises a fixed plate 51 parallel to the detection base plate 2 and four fixed columns 52. The fixed plate 51 is a square plate structure with the same size as the detection base plate 2, and a fixed through hole 511 for the infrared light to pass through is arranged at the center of the fixed plate 51. The bottom portions of the four fixed columns 52 are fixed at the four corners of the detection base plate 2 by screws respectively, and the top portions of the four fixed columns 52 are fixed at the four corners of the fixed plate 51 by screws respectively.

[0060] With reference to Figure 6 and Figure 7, the movable frame 6 comprises a movable plate 61 parallel to the detection base plate 2 and four movable columns 62. The movable plate 61 is a square plate structure, and a movable through hole 611 is formed in the center of the movable plate 61 for the infrared light to pass through. The movable columns 62 vertically pass through the fixed plate 51, that is, the fixed plate 51 is provided with sliding through holes 512 for the movable columns 62 to vertically pass through. The top of the four movable columns 62 is fixed to the four corners of the reflecting plate 3 by screws, and the reflecting layer 32 of the reflecting plate 3 has through holes matched with the movable columns 62. The bottom of the four movable columns 62 is fixed to the four corners of the movable plate 61 by screws.

[0061] With reference to Figure 8 , the fixed plate 51 is provided with a placement groove 53 for the placement of the movable plate 61, and the size of the placement groove 53 is consistent with the size of the movable plate 61. When the movable plate 61 is placed in the placement groove 53, the bottom surface of the movable plate 61 is flush with the bottom surface of the fixed plate 51.

[0062] With reference to Figure 8 and Figure 9 , the fixed plate 51 is provided with two rotating through holes 54 passing through the upper and lower surfaces. The two rotating through holes 54 are symmetrically arranged on the two sides of the placement groove 53, and a locking assembly is arranged at each rotating through hole 54. The locking assembly comprises a rotating shaft 55 rotatably arranged in the rotating through hole 54, a locking piece 56 connected to the bottom of the rotating shaft 55, and a rotating knob 57 mounted to the top of the rotating shaft 55. The top of the locking piece 56 is provided with a third threaded stud 561, and the bottom of the rotating shaft 55 is provided with a third threaded hole matched with the third threaded stud 561. The bottom of the rotating knob 57 is provided with a fourth threaded stud 571, and the top of the rotating shaft 55 is provided with a fourth threaded hole matched with the fourth threaded stud 571. When the movable plate 61 of the support structure is placed in the placement groove 53 of the fixed plate 51, the locking piece 56 can abut against the bottom surface of the movable plate 61 after being rotated, at which time the support structure is in an extended state.

[0063] With reference to Figure 10 and Figure 11 , the detection base plate 2 is a square plate structure. The top surface of the detection base plate 2 is provided with a positioning groove 23 for the placement of the movable plate 61, and the size of the positioning groove 23 is consistent with the size of the movable plate 61. The inner wall of the positioning groove 23 is provided with a mounting hole 24, and a ball head spring plunger 25 is mounted at the mounting hole 24. The mounting hole 24 is a through hole passing through the inner and outer side walls of the detection base plate 2. The side surface of the movable plate 61 is provided with a positioning hole 612 for the plunger ball 251 of the ball head spring plunger 25 to be clamped. When the movable plate 61 is placed in the positioning groove 3 of the detection base plate 2, the plunger ball 251 of the ball head spring plunger 25 is clamped in the positioning hole 612 of the movable plate 61, at which time the support structure is in a contracted state.

[0064] With reference to Figure 6 andFigure 7 The top of the fixing plate 51 is provided with a first rubber pad 58. When the support structure is in the contracted state, the first rubber pad 58 is in contact with the bottom surface of the light-reflecting plate 3.

[0065] Referring to Figure 6 and Figure 12 The fixing plate 51 is further provided with a dustproof plug 7 at the fixing through hole 511. The dustproof plug 7 comprises a dustproof plate 71 and a dustproof ring 72 connected to the dustproof plate 71 and matched with the fixing through hole 511.

[0066] The above are preferred embodiments of the present application, which are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An open optical path gas detection device, characterized by, The utility model provides a kind of infrared detection device, including control box (1), the detection base plate (2) installed on the top of the control box (1), the light-reflecting plate (3) is oppositely arranged with the detection base plate (2), the support structure connected with the detection base plate (2) and the light-reflecting plate (3);The control box (1) is provided with infrared emitter (12) and infrared receiver (13);The detection base plate (2) is opened with the emission through-hole (21) for the infrared light to pass through and with the infrared emitter (12) directly opposite and the receiving through-hole (22) for the infrared light to pass through and with the infrared receiver (13) directly opposite;The support structure includes fixed frame (5) fixedly installed on the detection base plate (2) and movable frame (6) fixedly installed on the light-reflecting plate (3) and slidingly arranged on the fixed frame (5);The fixed frame (5) includes fixed plate (51) parallel to the detection base plate (2), a plurality of fixed columns (52) fixedly connected with the detection base plate (2) and the fixed plate (51);The movable frame (6) includes movable plate (61) parallel to the detection base plate (2), a plurality of movable columns (62) fixedly connected with the light-reflecting plate (3) and the movable plate (61);The fixed frame (5) has a sliding through-hole (512) for the movable column (62) to slide;The fixed plate (51) has a fixed through-hole (511) for the detected infrared light to pass through;The movable plate (61) has a movable through-hole (611) for the detected infrared light to pass through.

2. The open optical path gas detection device according to claim 1, wherein, The support structure includes a plurality of support columns (4), one end of the support column (4) is fixedly connected to the light-reflecting plate (3) and the other end is fixedly connected to the detection base plate (2).

3. The open optical path gas detection device according to claim 1, wherein, The bottom surface of the fixed plate (51) is opened with an arrangement groove (53) for the movable plate (61) to be arranged;When the movable plate (61) is arranged in the arrangement groove (53), the bottom surface of the movable plate (61) is flush with the bottom surface of the fixed plate (51).

4. The open optical path gas detection device according to claim 3, wherein, The fixed plate (51) is provided with a rotating through-hole (54) penetrating the upper and lower surfaces and a locking assembly is rotatably installed at the rotating through-hole (54), the locking assembly includes a rotating shaft (55) rotatably arranged in the rotating through-hole (54), a locking piece (56) connected to the lower end of the rotating shaft (55) and a rotating knob (57) installed on the upper end of the rotating shaft (55);The locking piece (56) can abut against the bottom surface of the movable plate (61) located in the arrangement groove (53) after being rotated.

5. The open optical path gas detection device according to claim 4, wherein, At least two sets of the locking assembly are provided on the fixed plate (51).

6. The open optical path gas detection device according to claim 1, wherein The top surface of the detection base plate (2) is opened with a positioning groove (23) for the movable plate (61) to be arranged;The inner wall of the positioning groove (23) is opened with a mounting hole (24) and a ball head spring plunger (25) is installed at the mounting hole (24);The side surface of the movable plate (61) is opened with a positioning hole (612) for the plunger ball (251) of the ball head spring plunger (25) to be clamped.

7. The open optical path gas detection device according to claim 6, wherein, When the movable plate (61) is arranged in the positioning groove (23), the top surface of the fixed plate (51) is attached to the bottom surface of the light-reflecting plate (3).

8. The open optical path gas detection device according to claim 6, wherein, The top surface of the fixed plate (51) is provided with a first rubber pad (58).

9. The open optical path gas detection device according to claim 6, wherein, The fixed plate (51) is detachably provided with a dustproof plug (7), which comprises a dustproof plate (71) and a dustproof ring (72) connected to the dustproof plate (71) and matched with the fixed through hole (511).

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