Detection type concentration sensor

Abstract

The utility model relates to the technical field of sensors, and discloses a detection type concentration sensor which comprises a shell, an inductive probe, a processing module, a display module and an audible and visual alarm, and the inductive probe, the processing module, the display module and the audible and visual alarm are arranged on the shell. The support comprises a first PCB, a second PCB and a separation rod arranged between the first PCB and the second PCB, the display module is arranged on the first PCB, part of components in the processing module are installed on the first PCB, other components are installed on the second PCB, a plurality of installation bases are arranged in the shell, and the installation bases are arranged on the display module. A guide column is arranged in the mounting base in a sliding mode and connected to the support. According to the invention, the support is slidably connected to the housing through the installation seat and the guide columns, and the device is convenient to maintain the components on the second PCB.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, and in particular to a detection type concentration sensor. BACKGROUND

[0002] A concentration sensor is a device that can sense and measure the concentration of a specific substance in a gas or liquid, and is widely used in industrial production, medical treatment, environmental protection and other fields. A VOCs concentration sensor is usually provided in a gas station, and is mainly used for monitoring and controlling the emission of VOCs gas, so as to protect the environment and personnel safety.

[0003] In the related art, the concentration sensor includes a shell, and a sensing probe, a processing module, a display module and an audible and visual alarm disposed on the shell. A support for mounting the processing module and the display module is connected to the shell. The support includes a first PCB, a second PCB, and a partition rod disposed between the first PCB and the second PCB. The display module is disposed on the first PCB. Some components in the processing module are mounted on the first PCB, and other components are mounted on the second PCB.

[0004] During installation, the second PCB, the partition rod and the first PCB are sequentially placed in the shell, and then the first PCB, the partition rod and the second PCB are connected together and fixed on the shell by screws. After installation, the first PCB and the second PCB are both located inside the shell, and the second PCB is blocked by the first PCB.

[0005] However, when the components on the second PCB of the processing module need to be repaired, the first PCB must be removed first to observe the components on the second PCB, which is very troublesome. CONTENT OF THE INVENTION

[0006] In order to facilitate the repair of the components on the second PCB of the processing module, the present application provides a detection type concentration sensor.

[0007] The detection type concentration sensor provided by the present application adopts the following technical solution:

[0008] The utility model provides a kind of detection type concentration sensor, including shell and setting on shell sensing probe, processing module, display module and sound-light alarm, the shell is connected with the support for installing processing module and display module, the support includes first PCB board, second PCB board, the partitioning rod between first PCB board and second PCB board is set, the display module is set on first PCB board, part component in the processing module is installed on first PCB board, other component is installed on second PCB board, a plurality of mounting seats are provided in the shell, the guide column is slidably arranged in the mounting seat, and the guide column is connected to the support.

[0009] By adopting the above technical scheme, the support is installed in the shell through the sliding fit of the guide column and the mounting seat. The guide column can slide into or out of the mounting seat, thereby driving the support to move into or out of the shell. When the components on the second PCB board need to be overhauled, the guide column can be moved out of the mounting seat, so that the entire support moves out of the shell, facilitating the observation and overhaul of the components on the second PCB board. The first PCB board does not need to be removed in advance before overhaul, and the operation is convenient.

[0010] Optionally, the first PCB board, the second PCB board and the partitioning rod are jointly provided with a connecting bolt, and the guide column is provided with a connecting screw hole threadedly matched with the connecting bolt.

[0011] By adopting the above technical scheme, after the guide column is moved out of the mounting seat, the guide column can be rotated away from the second PCB board first, so that the connecting bolt is separated from the connecting screw hole. Then, the second PCB board is moved out of the connecting bolt, so that the second PCB board can be removed alone, thereby increasing the observation field of view of the second PCB board and improving the convenience of overhaul operation.

[0012] Optionally, a limiting gap is formed between the guide column and the second PCB board, a limiting block for preventing the guide column from moving out of the mounting seat is movably arranged on the shell, and the limiting block can move into or out of the limiting gap.

[0013] By adopting the above technical scheme, after the support is installed on the shell, the limiting block is controlled to move into the limiting gap. At this time, the limiting block is located on the path of the guide column moving out of the mounting seat. The limiting block can prevent the guide column from moving out of the mounting seat, so that the support is stably fixed in the shell. When the components on the second PCB board need to be overhauled, the limiting block can be controlled to move out of the limiting gap, so that the positioning of the guide column is released. The guide column can be pulled out of the mounting seat, so that the second PCB board is moved out of the shell, facilitating the overhaul.

[0014] Optionally, the shell includes a base and a movable ring rotatably arranged on the base, and the limiting block is provided with a plurality of limiting blocks and is fixedly connected to the inner side of the movable ring.

[0015] By adopting the technical scheme, when the support needs to be locked or unlocked, the movable ring can be directly rotated to make all the limiting blocks move into or out of the limiting gaps synchronously, which is more efficient than moving the limiting blocks one by one.

[0016] Optionally, the outer wall of the movable ring is provided with fluorescent strips equal in number to the limiting blocks and corresponding to the limiting blocks one by one, and the fluorescent strips are located on the side of the corresponding limiting blocks away from the central axis of the movable ring.

[0017] By adopting the technical scheme, since the positions of the fluorescent strips correspond to the positions of the limiting blocks, when the movable ring is rotated, the operator can determine the positions of the limiting blocks in the shell through the positions of the fluorescent strips. When the components on the second PCB need to be overhauled, the movable ring is only needed to be rotated to make the fluorescent strips deviate from the positions of the visible connecting bolts on the first PCB, so that the limiting blocks can move out of the limiting gaps; when the support needs to be fixed in the shell, the movable ring is only needed to be rotated to make the fluorescent strips correspond to the positions of the connecting bolts, so that the limiting blocks can move into the limiting gaps, which is high in visual operation and convenient to operate. Moreover, the fluorescent strips can emit light in a dim environment, so as to facilitate the operator to quickly locate the movable ring.

[0018] Optionally, the circumferential side wall of the movable ring is provided with anti-skid lines.

[0019] By adopting the technical scheme, when the movable ring is rotated, the anti-skid lines increase the friction between the hands of the operator and the movable ring, so that the hands of the operator are not easy to slide relative to the movable ring, and the movable ring is convenient to rotate.

[0020] Optionally, the inner side of the base is provided with a stop block located on the rotating path of the limiting block, and when the limiting block abuts against the stop block, the limiting block moves out of the limiting gap.

[0021] By adopting the technical scheme, when the limiting block moves out of the limiting gap, the stop block can hinder the limiting block from continuing to rotate away from the limiting gap, so as to prevent the limiting block from rotating excessively. Moreover, the stop block can control the activity range of the limiting block, so that the limiting block is short in rotating stroke and high in rotating efficiency.

[0022] Optionally, the stop block is provided with a stop groove for the one end of the limiting block to extend into, and the stop groove is in interference fit with the limiting block.

[0023] By adopting the technical scheme, when the limiting block moves out of the limiting gap, the one end of the limiting block can extend into the stop groove, so that the stability of the limiting block is improved. When the components on the second PCB need to be overhauled, the limiting block is not easy to be randomly rotated into the limiting gap, and is not easy to hinder the guide column from moving out of the mounting seat, so that the support is convenient to disassemble, and then the components on the second PCB are convenient to overhaul.

[0024] Optionally, the inductive probe is provided with a filter screen near one end close to the medium input direction.

[0025] By adopting the above technical scheme, when the medium input inductive probe, the large particle impurities in the medium are not easy to enter the inductive probe, and the risk of the inductive probe being blocked by impurities is reduced.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The second PCB is slidably arranged in the shell through the guide column, facilitating disassembly of the second PCB to overhaul the components of the processing module on the second PCB.

[0028] 2. The shell comprises a base and a movable ring, and the limiting block can be moved into or out of the limiting gap by rotating the movable ring to control the limiting action on the guide column, improving the operation efficiency.

[0029] 3. The stop groove can be used for the end of the limiting block to extend in when the limiting block moves out of the limiting gap, so as to limit the limiting block, so that the limiting block is not easy to rotate into the limiting gap at will, facilitating the removal of the guide column from the mounting seat, and further facilitating the overhaul of the components of the processing module on the second PCB. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the overall structure diagram of embodiment 1 of the present application.

[0031] Figure 2 is the explosion schematic diagram of the hidden cover shell of embodiment 1 of the present application.

[0032] Figure 3 is the explosion schematic diagram of the hidden cover shell of embodiment 2 of the present application.

[0033] Figure 4 is the structure schematic diagram for showing the limiting gap in embodiment 2 of the present application.

[0034] Explanation of reference signs:

[0035] 1, shell; 11, mounting seat; 12, guide column; 13, connecting screw hole; 14, connecting bolt; 15, base; 16, movable ring; 161, limiting block; 162, limiting gap; 163, fluorescent bar; 164, anti-skid pattern; 17, stop block; 171, stop groove; 18, cover shell; 2, support; 21, first PCB; 22, second PCB; 23, separation rod; 3, inductive probe; 31, filter screen; 32, air hole; 4, processing module; 5, display module; 6, audible and visual alarm. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying Figures 1-4The application is described in further detail.

[0037] The application discloses a detection type concentration sensor.

[0038] Embodiment 1

[0039] With reference to Figure 1 and Figure 2 The detection type concentration sensor comprises a shell 1, an inductive probe 3, a processing module 4, a display module 5 and an audible and light alarm 6 arranged on the shell 1. The shell 1 is connected with a support 2 for mounting the processing module 4 and the display module 5. The support 2 comprises a first PCB board 21, a second PCB board 22 and a partition rod 23 arranged between the first PCB board 21 and the second PCB board 22. The display module 5 is arranged on the first PCB board 21. Part of components in the processing module 4 are mounted on the first PCB board 21 and the other components are mounted on the second PCB board 22. A cover 18 made of transparent material is detachably arranged on the shell 1. The cover 18 is arranged outside the display module 5 and can transmit light, so that the display condition of the display module 5 can be observed from outside.

[0040] With reference to Figure 1 and Figure 2 The inductive probe 3 can transmit the detected medium concentration signal to the processing module 4. The processing module 4 displays the data through the display module 5. When the detected medium concentration exceeds the standard, the audible and light alarm 6 is started to alarm. It should be noted that the display module 5 and the processing module 4 in the embodiment belong to the prior art and are not the main improvement points of the application, so they are not described here.

[0041] With reference to Figure 1 One end of the inductive probe 3 close to the medium input direction is provided with a filter screen 31. A plurality of air holes 32 capable of allowing the medium to pass through are formed in the filter screen 31. The air holes 32 can prevent impurities with a width greater than the inner diameter from entering the inductive probe 3, thereby reducing the risk of the inductive probe 3 being blocked by impurities.

[0042] With reference to Figure 2The shell 1 is provided with a plurality of mounting seats 11, and the number of the mounting seats 11 is preferably four in the embodiment, and the specific number can be designed according to the customer demand in other cases. The guiding column 12 is slidingly arranged in the mounting seat 11, and the cross section of the guiding column 12 is preferably hexagonal. A plurality of connecting bolts 14 are arranged in the first PCB 21, the second PCB 22 and the partition rod 23, and the number of the connecting bolts 14 is preferably four in the embodiment. The connecting screw hole 13 threadedly matched with the connecting bolt 14 is formed in the guiding column 12. The bracket 2 is connected with the guiding column 12 through the connecting bolt 14, and the guiding column 12 is slidingly arranged in the mounting seat 11, so that when the components on the second PCB 22 need to be overhauled, the guiding column 12 can be directly removed from the mounting seat 11, and then the guiding column 12 connected with the connecting bolt 14 is removed, so that the second PCB 22 can be separately removed for the convenience of overhauling the components.

[0043] The implementation principle of the concentration sensor in the embodiment of the application is that the mounting seat 11 and the guiding column 12 slidingly matched with the shell 1 are arranged, and the guiding column 12 is threadedly connected with the connecting bolt 14, so that the bracket 2 can be easily removed from the shell 1, and then the components on the second PCB 22 are conveniently overhauled.

[0044] Embodiment 2

[0045] With reference to Figure 3 and Figure 4 The difference between the embodiment and the embodiment 1 is that the shell 1 comprises the base 15 and the movable ring 16 rotationally arranged on the base 15, the movable ring 16 can rotate relative to the base 15, and a plurality of limiting blocks 161 are fixed to the inner side of the movable ring 16, the number of the limiting blocks 161 is equal to and corresponds to the number of the guiding columns 12.

[0046] With reference to Figure 3 and Figure 4 When the guiding column 12 is connected with the connecting bolt 14, a limiting gap 162 is formed between the guiding column 12 and the second PCB 22. With the rotation of the movable ring 16 relative to the base 15, the limiting block 161 can move into or out of the limiting gap 162 formed by the corresponding guiding column 12 and the second PCB 22. When the bracket 2 is moved into the shell 1, the movable ring 16 can be first rotated to move the limiting block 161 into the limiting gap 162, so as to block the guiding column 12 from moving out of the mounting seat 11. Through the above-mentioned way, the limiting of the guiding column 12 is realized, so that the stability of the bracket 2 in the shell 1 is higher, and the bracket 2 and the guiding column 12 will not slide at will. When the components on the second PCB 22 need to be overhauled, the movable ring 16 only needs to be rotated to synchronously move the limiting blocks 161 out of the limiting gaps 162, so that the operation is simple and efficient.

[0047] With reference to Figure 3 and Figure 4The inner side of the base 15 is fixed with a stop block 17 located on the rotating path of the limiting block 161, the number of the stop block 17 is equal to that of the limiting block 161 and one-to-one correspondence, when the limiting block 161 and the corresponding stop block 17 abut each other, the limiting block 161 moves out of the limiting gap 162. The stop block 17 is located on the side of the movable ring 16 away from the first PCB board 21, and the stop block 17 does not contact the inner wall of the movable ring 16 and does not affect the rotation of the movable ring 16. The stop groove 171 is opened on the side wall of the stop block 17 close to the corresponding limiting block 161, the stop groove 171 is used for the one end of the limiting block 161 to extend into, and the stop groove 171 is in interference fit with the limiting block 161. When the limiting block 161 moves out of the limiting gap 162, it can continue to rotate until the one end of the limiting block 161 extends into the stop groove 171, at this time, the stop block 17 can hinder the displacement of the limiting block 161, which helps to improve the stability of the limiting block 161.

[0048] With reference to Figure 3 The outer wall of the movable ring 16 is provided with a fluorescent strip 163 equal in number to the limiting block 161 and one-to-one correspondence, the fluorescent strip 163 is located on the side of the corresponding limiting block 161 away from the central axis of the movable ring 16, the fluorescent strip 163 can indicate the position of the limiting block 161, so that when the movable ring 16 is rotated, the specific position of the limiting block 161 can be observed on the outside of the shell 1. The circumferential outer wall of the movable ring 16 is provided with anti-skid lines 164, which can increase the friction between the operator's hand and the outer wall of the movable ring 16, and facilitate the rotation of the movable ring 16.

[0049] The implementation principle of the detection type concentration sensor is as follows: when the guide column 12 needs to be limited, only the movable ring 16 is rotated to make all the limiting blocks 161 synchronously move into the corresponding limiting gaps 162, so that the guide column 12 can be limited in the mounting seat 11, thereby improving the stability of the support 2. When the components on the second PCB board 22 need to be overhauled, only the movable ring 16 is rotated to make the one end of the limiting block 161 extend into the stop groove 171, so that the guide column 12 can be moved out of the mounting seat 11, which is convenient for overhaul.

[0050] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: 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. A detection type concentration sensor, comprising a shell (1) and a sensing probe (3), a processing module (4), a display module (5) and an audible and light alarm (6) arranged on the shell (1), a support (2) for mounting the processing module (4) and the display module (5) is connected to the shell (1), the support (2) comprises a first PCB board (21), a second PCB board (22) and a partition rod (23) arranged between the first PCB board (21) and the second PCB board (22), the display module (5) is arranged on the first PCB board (21), and part of components in the processing module (4) are mounted on the first PCB board (21) and the other components are mounted on the second PCB board (22), characterized in that: The shell (1) is provided with a plurality of mounting seats (11), a guide column (12) is slidably arranged in the mounting seat (11), and the guide column (12) is connected to the support (2).

2. A probe-type concentration sensor according to claim 1, characterized in that: The first PCB (21), the second PCB (22) and the partition rod (23) are commonly provided with a connecting bolt (14), and the guide column (12) is provided with a connecting screw hole (13) which is threadedly matched with the connecting bolt (14).

3. A probe-type concentration sensor according to claim 2, characterized in that: The guide column (12) and the second PCB (22) form a limiting gap (162), the shell (1) is movably provided with a limiting block (161) for preventing the guide column (12) from moving out of the mounting seat (11), and the limiting block (161) can move into or out of the limiting gap (162).

4. A probe-type concentration sensor according to claim 3, characterized in that: The shell (1) comprises a base (15) and a movable ring (16) rotatably arranged on the base (15), the limiting block (161) is provided in plurality and is fixedly connected to the inner side of the movable ring (16), the guide column (12) is equal in number to the limiting block (161) and one-to-one corresponding.

5. A probe-type concentration sensor according to claim 4, characterized in that: The outer wall of the movable ring (16) is provided with a fluorescent strip (163) equal in number to the limiting block (161) and one-to-one corresponding, and the fluorescent strip (163) is located on the side of the corresponding limiting block (161) away from the central axis of the movable ring (16).

6. A probe-type concentration sensor according to claim 4, characterized in that: The circumferential outer wall of the movable ring (16) is provided with an anti-skid pattern (164).

7. A probe-type concentration sensor according to claim 5, characterized in that: The inner side of the base (15) is provided with a stop block (17) located on the rotating path of the limiting block (161), when the limiting block (161) and the stop block (17) abut against each other, the limiting block (161) moves out of the limiting gap (162).

8. A probe-type concentration sensor according to claim 7, characterized in that: The stop block (17) is provided with a stop groove (171) for the one end of the limiting block (161) to extend into, and the stop groove (171) is in interference fit with the limiting block (161).

9. A probe-type concentration sensor according to claim 1, characterized in that: The inductive probe (3) is provided with a filter screen (31) at the end close to the medium input direction.

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