Gas content automatic detection device

Abstract

The utility model discloses a gas content automatic detection device which comprises a trolley, and a battery, a first parallel main circuit, a second parallel main circuit, a third parallel main circuit, a first contactor and a second contactor are arranged on the trolley. The first parallel main circuit, the second parallel main circuit and the third parallel main circuit are all connected with the battery in series, the first contactor is arranged on the second parallel main circuit, and the second contactor is arranged on the third parallel main circuit; the second parallel main road is used for controlling the trolley to advance, and the third parallel main road is used for controlling the trolley to retreat. The gas content is monitored in real time in the measurement space by using the trolley, so that the advancing state is changed in time when the gas content is abnormal, a worker is reminded to exit from the measurement space, and the best escape time is won for the worker and a guardian.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas content detection, in particular to a kind of gas content automatic detection device. BACKGROUND

[0002] When working in a limited space, due to the complex working environment, there are many harmful factors, and sampling analysis is needed after cleaning, replacement, ventilation and other links in the space before work, and the analysis result is within the safe allowable range. Workers carrying alarm enter the space to work.

[0003] Because personnel need to enter the closed space for sampling analysis, if the space is large enough, sampling analysis is not enough to represent the whole space, and the risk is large. And even if the alarm is carried during the work, when the toxic gas content exceeds the standard, the workers exit the site and the rescue personnel enter the site to rescue, which leads to serious lag and further expansion of the accident. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a kind of gas content automatic detection device to solve the problem of gas content detection in limited space in prior art.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] A kind of gas content automatic detection device, including trolley, battery, first parallel main road, second parallel main road, third parallel main road, first contactor and second contactor are arranged on the trolley;The first parallel main road, second parallel main road and third parallel main road are all in series with battery, the first contactor is arranged on the second parallel main road, and the second contactor is arranged on the third parallel main road;

[0007] First contact, fourth contact and motor are arranged in the first parallel main road, the first contact is controlled by the first contactor, and the fourth contact is controlled by the second contactor;The first contact and the fourth contact are connected in parallel to form a first parallel branch, and the motor is used to control the start of trolley, and is connected in series with the first parallel branch;

[0008] Forward button and fifth contact are arranged in the second parallel main road, the fifth contact is controlled by the second contactor, and the forward button, the fifth contact and the first contactor are connected in series;

[0009] Retreat button, first switch, second switch and second contact are arranged in the third parallel main road, the second contact is controlled by the first contactor, the first switch and the second switch are connected in parallel to form a second parallel branch, and the retreat button, the second contact and the second contactor are connected in series with the second parallel branch.

[0010] Optionally, a fourth parallel main path is further included, and an analyzer for detecting gas content is arranged on the fourth parallel main path, the analyzer is provided with an upper limit value and a lower limit value, the lower limit value corresponds to the first switch, and is used for controlling the first switch to be closed or opened; the upper limit value corresponds to the second switch, and is used for controlling the second switch to be closed or opened.

[0011] Optionally, a sixth contact point controlled by the second contactor is arranged on the third parallel main path, and the sixth contact point is parallel to the second parallel branch.

[0012] Optionally, a third contact point controlled by the first contactor is arranged on the second parallel main path, and the third contact point is parallel to the forward button.

[0013] Optionally, a reciprocating switch is further arranged on the trolley, and the reciprocating switch is arranged in the second parallel branch and is parallel to the first switch and the second switch.

[0014] Optionally, the reciprocating switch is arranged at the front end of the trolley.

[0015] Optionally, an audible and visual alarm is further arranged on the trolley, and the audible and visual alarm is connected in series with the first switch and the second switch.

[0016] Compared with the prior art, the application has at least the following beneficial effects:

[0017] 1. The vehicle-mounted gas analyzer is used to detect the gas content of the closed space in real time, and the risk and limitation of personnel entering the site for sampling are reduced; if the gas content exceeds the standard during the work, the best escape time can be obtained for the workers and the guardians.

[0018] 2. The device uses small-size components, is convenient to install, has simple control lines, and is convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more directly illustrate the prior art and the application, the following exemplary drawings are given. It should be understood that the specific shapes, structures shown in the drawings should not be regarded as the limiting conditions for realizing the application; for example, based on the technical concept disclosed in the application and the exemplary drawings, those skilled in the art can easily make routine adjustments or further optimization on the increase / decrease / attribute division of certain units (components), specific shapes, positional relationship, connection mode, size ratio relationship, etc.

[0020] Figure 1 A structure schematic diagram of a gas content automatic detection device provided for an embodiment of the application;

[0021] Figure 2 An electrical control schematic diagram of a gas content automatic detection device provided for an embodiment of the application.

[0022] Reference signs:

[0023] 1, trolley; 2, battery; 3, motor; 4, analyzer; 5, sound-light alarm; 6, forward button; 7, backward button; 8, probe; 9, first parallel main circuit; 10, second parallel main circuit; 11, third parallel main circuit. DETAILED DESCRIPTION

[0024] The application will be further described in detail below with reference to the accompanying drawings.

[0025] In the description of the present application: unless otherwise specified, the meaning of "a plurality of" is two or more. The terms "first", "second", "third" and the like in the present application are intended to distinguish the objects referred to, and do not have a special meaning in the technical connotation aspect (for example, it should not be understood as emphasizing the importance or order, etc.). The expressions "include", "contain", "have" and the like also mean "not limited to" (some units, components, materials, steps, etc.).

[0026] An automatic gas content detection device, with reference to Figure 1 and Figure 2 , comprising a trolley 1, the trolley 1 is provided with a battery 2, a first parallel main circuit 9, a second parallel main circuit 10, a third parallel main circuit 11, a first contactor KM1 and a second contactor KM2. The first parallel main circuit 9, the second parallel main circuit 10 and the third parallel main circuit 11 are all in series with the battery 2. The first contactor KM1 is arranged on the second parallel main circuit 10, the second contactor KM2 is arranged on the third parallel main circuit 11, and the first contactor KM1 and the second contactor KM2 are both provided with multiple groups of contacts.

[0027] Specifically, the first contactor KM1 includes a first contact KM11, a second contact KM12 and a third contact KM13, and the second contactor KM2 includes a fourth contact KM21, a fifth contact KM22 and a sixth contact KM23.

[0028] In addition, the trolley 1 is also provided with an analyzer 4, the analyzer 4 is in series with the battery 2, and a probe 8 for detecting the gas content is also arranged thereon. The analyzer 4 is provided with a first value and a second value, the first value is less than the second value, which is used to represent the lower limit value and the upper limit value of the analyzer 4 triggering.

[0029] The first parallel main circuit 9 is provided with the first contact KM11, the fourth contact KM21 and the motor 3. The first contact KM11 is controlled by the first contactor KM1, and the fourth contact KM21 is controlled by the second contactor KM2. The first contact KM11 and the fourth contact KM21 are in parallel to form a first parallel branch, and the motor 3 is used to control the start of the trolley 1 and is in series with the first parallel branch.

[0030] The second parallel main circuit 10 is provided with a fifth contact KM22 and the forward button 6. The fifth contact KM22 is controlled by the second contactor KM2, and the forward button 6, the fifth contact KM22 and the first contactor KM1 are connected in series.

[0031] In addition, the third switch L2 and the fourth switch H2 are arranged between the forward button 6 and the fifth contact KM22, and the third switch L2 and the fourth switch H2 are controlled by the analyzer 4, and represent the first value (lower limit value) and the second value (upper limit value) respectively, so as to control the closing and opening of the corresponding switch. When the gas content is between the first value and the second value, it indicates that the environment is safe, and the third switch L2 and the fourth switch H2 are closed, and the second parallel main circuit 10 is powered on.

[0032] In order to keep the car continue to move after the forward button 6 is released, a third contact KM13 is further arranged on the second parallel main circuit 10, and the third contact KM13 is controlled by the first contactor KM1 and is connected in parallel with the forward button 6. When the forward button 6 is pressed and the second parallel main circuit 10 is powered on, the first contactor KM1 can control the first contact KM11 and the third contact KM13 to be closed, so that the first parallel main circuit 9 and the second parallel main circuit 10 are kept in a powered-on state, so as to continue to move in the case of normal gas content.

[0033] The third parallel main circuit 11 is provided with the backward button 7, the first switch L1, the second switch H1 and the second contact KM12. The second contact KM12 is controlled by the first contactor KM1, the first switch L1 and the second switch H1 are connected in parallel to form a second parallel branch, and the backward button 7, the second parallel branch, the second contact KM12 and the second contactor KM2 are connected in series.

[0034] Among them, the first switch L1 and the second switch H1 are controlled by the analyzer 4 and are triggered by the first value and the second value respectively. In the normal state, the first switch L1 and the second switch H1 are both open; when the gas content is lower than the first value, the first switch L1 is closed; when the gas content is higher than the second value, the second switch H1 is closed.

[0035] Therefore, when the car encounters a situation of too high or too low gas content during driving, the first switch L1 or the second switch H1 will be triggered to close, and the third switch L2 and the fourth switch H2 will be opened at the same time. The second parallel main circuit 10 is powered off, the second contact KM12 returns to the initial closed state, and the first contact KM11 returns to the open state; the first parallel main circuit 9 is powered on, the second contactor KM2 controls the fifth contact KM22 to be opened, the fourth contact KM21 is closed, and the car starts to move backward.

[0036] But since the car will pass through the area with normal gas content during the backward process, in order to avoid the car triggering the forward instruction and keeping the continuous backward state, the sixth contact KM23 is also arranged on the third parallel main circuit 11. The sixth contact KM23 is controlled by the second contactor KM2 and is in parallel with the first switch L1 and the second switch H1 as a part of the second parallel branch. Therefore, as long as the third parallel main circuit 11 is powered (abnormal gas content), the sixth contact KM23 will keep closed under the control of the second contactor KM2 to keep the third parallel main circuit 11 powered continuously, and the car can keep the backward state until it exits the measuring space.

[0037] In the embodiment, in order to better protect the staff, the first value and the second value are set as values with a margin, that is, the first value is slightly greater than the lower limit critical value of the gas content that the human body can bear, and the second value is slightly less than the upper limit critical value of the gas content that the human body can bear.

[0038] In other embodiments, the trolley 1 is also provided with a reciprocating switch S1, which is arranged in the second parallel branch and is in parallel with the first switch L1, the second switch H1 and the sixth contact KM23. The reciprocating switch S1 is a touch button arranged at the front end of the trolley 1, and the purpose is that when the trolley 1 normally drives to the end of the space, the reciprocating switch S1 is closed, and the third parallel main circuit 11 is powered, and the trolley 1 can back up. During the backward process, the trolley 1 continues to detect the gas content in the space.

[0039] In the embodiment, the forward button 6 and the backward button 7 are both manually operable buttons.

[0040] In order to more intuitively prompt the staff, the trolley 1 is also provided with an audible and visual alarm 5. The audible and visual alarm 5 is in series with the first switch L1 and the second switch H1, and as long as the gas content is abnormal, the audible and visual alarm 5 can be triggered to alarm and prompt the staff to leave the measuring space in time. The audible and visual alarm 5 can also be directly arranged on the analyzer 4, and when the analyzer 4 detects that the gas content is abnormal, the audible and visual alarm 5 is directly triggered.

[0041] The implementation principle of the embodiment of the application is that in the initial state, the first contact KM11 and the fourth contact KM21 are disconnected, the second contact KM12 is closed, and the third contact KM13 is disconnected; the fifth contact KM22 is closed, and the sixth contact KM23 is disconnected. When the first contactor KM1 and the second contactor KM2 are not powered, the corresponding contacts remain in the initial state, and after being powered, the corresponding contacts change state.

[0042] When entering the space, the forward switch is pressed manually, at this time the second parallel main circuit 10 is powered on, under the condition of normal gas content, the third switch L2, the fourth switch H2 and the fifth contact KM22 remain closed, then the second parallel main circuit 10 is powered on, the first contact KM1 controls the first contact KM11 to be closed, the second contact KM12 is opened, and the third contact KM13 is closed, then the trolley 1 keeps the forward state.

[0043] During the process of moving, when the abnormal gas concentration (lower than the first value or higher than the second value) is encountered, the corresponding switch is closed (the first switch L1 or the second switch H1 is closed, and the sound-light alarm 5 is triggered to alarm), the third switch L2 and the fourth switch H2 are both opened, the second parallel main circuit 10 is opened, then the first contact KM11, the second contact KM12 and the third contact KM13 return to the initial state. At the same time, the fourth contact KM21 is closed, the fifth contact KM22 is opened, the sixth contact KM23 is closed, the third parallel main circuit 11 is powered on, and the trolley 1 continues to retreat until it exits the measurement space.

[0044] If the trolley 1 can keep the normal state, it advances to the end of the space, then the reciprocating switch S1 is closed, the second parallel main circuit 10 is powered off, the third parallel main circuit 11 is powered on, and the trolley 1 changes to the retreat state and moves out of the measurement space.

[0045] The technical features of the above embodiments can be combined in any manner (as long as the combination of the technical features does not exist contradictions), in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described; these embodiments which are not explicitly written should also be considered as the scope of the present disclosure.

Claims

1. A gas content automatic detection device, characterized by: The trolley (1) is provided with a battery (2), a first parallel main line (9), a second parallel main line (10), a third parallel main line (11), a first contactor KM1 and a second contactor KM2; the first parallel main line (9), the second parallel main line (10) and the third parallel main line (11) are all in series with the battery (2), the first contactor KM1 is arranged on the second parallel main line (10), and the second contactor KM2 is arranged on the third parallel main line (11); The first parallel main line (9) is provided with a first contact KM (11), a fourth contact KM21 and a motor (3), the first contact KM (11) is controlled by the first contactor KM1, and the fourth contact KM21 is controlled by the second contactor KM2; the first contact KM (11) and the fourth contact KM21 are connected in parallel to form a first parallel branch, and the motor (3) is used for controlling the start of the trolley (1) and is connected in series with the first parallel branch; The second parallel main line (10) is provided with an advance button (6) and a fifth contact KM22, the fifth contact KM22 is controlled by the second contactor KM2, and the advance button (6), the fifth contact KM22 and the first contactor KM1 are connected in series; The third parallel main line (11) is provided with a retreat button (7), a first switch L1, a second switch H1 and a second contact KM12, the second contact KM12 is controlled by the first contactor KM1, the first switch L1 and the second switch H1 are connected in parallel to form a second parallel branch, and the retreat button (7), the second contact KM12 and the second contactor KM2 are all connected in series with the second parallel branch.

2. The gas content automatic detection device according to claim 1, characterized by: The fourth parallel main line is further provided with an analyzer (4) for detecting the content of gas, the analyzer (4) is provided with an upper limit value and a lower limit value, the lower limit value corresponds to the first switch L1 and is used for controlling the first switch L1 to be closed or opened; the upper limit value corresponds to the second switch H1 and is used for controlling the second switch H1 to be closed or opened.

3. The gas content automatic detection device according to claim 1, characterized by: The third parallel main line (11) is provided with a sixth contact KM23 controlled by the second contactor KM2, and the sixth contact KM23 is connected in parallel with the second parallel branch.

4. The gas content automatic detection device according to claim 1, characterized by: The second parallel main line (10) is provided with a third contact KM13 controlled by the first contactor KM1, and the third contact KM13 is connected in parallel with the advance button (6).

5. The gas content automatic detection device according to claim 1, characterized by: The trolley (1) is further provided with a reciprocating switch S1, the reciprocating switch S1 is arranged in the second parallel branch and is connected in parallel with the first switch L1 and the second switch H1.

6. The gas content automatic detection device according to claim 5, characterized by: The reciprocating switch S1 is arranged at the front end of the trolley (1).

7. The gas content automatic detection device according to claim 1, characterized by: The trolley (1) is further provided with an audible and visual alarm (5), and the audible and visual alarm (5) is connected in series with the first switch L1 and the second switch H1.

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