Gas collecting device for waste gas detection

Abstract

The utility model relates to the technical field of gas collection, and discloses a gas collection device for waste gas detection, which comprises a collection cylinder, an end cover and a bottom cover, the end cover and the bottom cover are respectively sleeved on the upper portion and the lower portion of the collection cylinder, a plurality of collection bins are evenly distributed on the periphery of the collection cylinder, and inner cylinders are arranged in the collection bins. A connector is arranged at the top of the inner cylinder, a fixing cover is in threaded connection with the end of the connector, and an air collecting bag is fixed to the end of the connector through screwing of the connector and the fixing cover; the gas collecting device is provided with a plurality of inner barrels, the gas collecting bags are fixed in the respective inner barrels, a default sealing state can be kept, different gas collecting bags can be opened in sequence by matching the switching motor with the collecting motor, certain negative pressure is generated for the gas collecting bags, and then waste gas at different stages is pumped into different gas collecting bags to be collected. The operation that internal waste gas needs to be emptied firstly during continuous gas collection is not needed, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of gas collection, in particular to a gas collection device for waste gas detection. Background Art

[0002] Collecting and testing waste gas generated at different times is an important measure to protect the environment and ensure production quality and safety. Through systematic monitoring and analysis, enterprises can better manage waste gas emissions and continuously improve production processes to reduce negative impacts on the environment. During the production process, waste gas emissions may vary due to different operation stages or production batches. By collecting and testing waste gas generated at different times, emissions at different stages or batches can be evaluated to ensure that the production process complies with environmental regulations and standards.

[0003] At present, for conventional exhaust gas detection, gas is collected once, and the collected gas needs to be emptied each time before the next stage of gas collection can be carried out, which is inconvenient. Utility Model Content

[0004] The utility model aims to provide a gas collection device for exhaust gas detection, aiming to solve the problem of inconvenience in multiple gas collections during the existing exhaust gas detection.

[0005] The utility model is implemented as follows: a gas collection device for exhaust gas detection comprises a collection tube and an end cover and a bottom cover respectively sleeved on the upper and lower parts of the collection tube, a plurality of collection bins are evenly distributed around the collection tube, an inner tube is arranged inside the collection bin, a connector is arranged on the top of the inner tube, a fixing cover is threadedly connected to the end of the connector, and a gas collecting bag is screwed and fixed to the fixing cover through the connector and the fixing cover;

[0006] A switching motor is installed inside the bottom cover, the output shaft of the switching motor is connected to an end plate, the top of the end plate is connected to a rotating shaft that penetrates the collection tube and extends to its upper end, a shift block is installed at the end of the rotating shaft, and a connecting rod corresponding to the inner tube is provided at one end of the collection tube close to the shift block, the connecting rod is arranged to be lifted and lowered, and a sealing plug for sealing the air collecting bag is installed;

[0007] The cross section of the sealing plug is in an inverted cone shape, and a tapered groove corresponding to the sealing plug is provided on the fixing cover, and the tapered groove of the fixing cover is communicated with the interior of the air collecting bag.

[0008] Preferably, a sleeve rod is provided on one side of the end of the inner cylinder, a lifting rod is slidably installed inside the sleeve rod, the connecting rod is connected to the end of the lifting rod, and a limiting plate is provided at one end of the lifting rod inside the sleeve rod, and a spring is provided between the top inner side of the sleeve rod and the limiting plate.

[0009] Preferably, a push rod is provided at one end of the connecting rod away from the sealing plug, a ball is embedded at the end of the push rod, and a chamfer is provided on one side of the shift block.

[0010] Preferably, the end bearing of the inner cylinder is connected to a rotating rod, the external thread of the rotating rod is connected to a telescopic rod, and the end of the telescopic rod is installed with a piston placed inside the inner cylinder for sliding;

[0011] The inner wall of the inner cylinder is provided with a limiting plate, and the outer side of the end of the telescopic rod is provided with a limiting groove corresponding to the limiting plate.

[0012] Preferably, the end plate is elliptical in shape, a collecting motor is installed at the axial portion of the end plate close to the collecting cylinder, a driving gear shaft driven by the collecting motor is installed at the other end of the end plate, and a transmission gear meshing with the driving gear shaft is sleeved at the end of the rotating rod.

[0013] Preferably, a power supply and a PLC are also provided inside the bottom cover, the PLC is integrated with a communication module, and the PLC is also electrically connected to various electrical components.

[0014] The utility model discloses a gas collection device for exhaust gas detection, which has the following beneficial effects:

[0015] 1. The gas collection device is provided with multiple inner cylinders, and gas collecting bags are fixed in each inner cylinder, and can maintain a default sealing state. By switching the motor and cooperating with the collection motor, different gas collecting bags can be opened in turn and a certain negative pressure can be generated for them, and then the exhaust gas at different stages can be drawn into different gas collecting bags for collection. There is no need to empty the internal exhaust gas before continuous gas collection, and the device is highly practical.

[0016] 2. When the shift block is driven to rotate by the rotating shaft, it pushes up the push rod with the ball upward through the chamfered side. During the rising process of the push rod, it will pull the connecting rod to separate the sealing plug from the fixed cover. At the same time, the lifting rod will compress the spring. Once the shift block continues to rotate and the push rod leaves the shift block, the spring reset will drive the sealing plug to press against the conical groove of the fixed cover again, thereby sealing the air bag.

[0017] 3. When the rotating rod rotates, the telescopic rod connected to its external thread will drive the piston to move up and down in the inner cylinder. During the sinking process of the piston, the internal space of the inner cylinder increases, thus generating a certain negative pressure, sucking the air collecting bag downward, and then the external exhaust gas can be drawn into it by the air collecting bag to complete the collection. When the internal exhaust gas needs to be discharged, the piston can be moved upward.

[0018] 4. Receive requests from the terminal through the communication module (GPRS / wif / Bluetooth), and request instructions to send instructions to the PLC model S4-400, so that it can control the activities of the collection motor and the switching motor output shaft in real time, thereby completing the operation of collecting exhaust gas at different stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a gas collection device for exhaust gas detection provided by an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of an end cover of a gas collection device for exhaust gas detection provided by an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of a bottom cover of a gas collection device for exhaust gas detection provided by an embodiment of the utility model;

[0022] Figure 4 The utility model provides a gas collection device for exhaust gas detection. Figure 3 A schematic diagram of a cross-sectional structure along the arrow direction AA;

[0023] Figure 5 The utility model provides a gas collection device for exhaust gas detection. Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0024] Marking Description:

[0025] 1. Collection tube; 2. Bottom cover; 3. End cover;

[0026] 11. Rotating shaft; 111. Shifting block; 112. End plate; 113. Collecting motor; 114. Switching motor; 115. Collecting bin; 116. Driving gear shaft;

[0027] 12. inner cylinder; 121. connector; 122. fixed cover; 123. air collecting bag;

[0028] 13. rotating rod; 131. transmission gear; 132. telescopic rod; 133. piston;

[0029] 14. sleeve rod; 141. lifting rod; 142. spring; 143. connecting rod; 144. push rod; 145. sealing plug. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0033] In this embodiment:

[0034] Reference Figure 1-3 As shown, a preferred embodiment of the utility model is provided.

[0035] The gas collection device for exhaust gas detection of this embodiment includes a collection tube 1 and an end cover 3 and a bottom cover 2 respectively sleeved on the upper and lower parts of the collection tube 1. A plurality of collection bins 115 are evenly distributed around the collection tube 1. An inner tube 12 is provided inside the collection bin 115. A connector 121 is provided on the top of the inner tube 12. A fixing cover 122 is threadedly connected to the end of the connector 121. A gas collecting bag 123 is screwed and fixed to the connector 121 and the fixing cover 122.

[0036] A switching motor 114 is installed inside the bottom cover 2, and the output shaft of the switching motor 114 is connected to an end plate 112. The top of the end plate 112 is connected to a rotating shaft 11 that penetrates the collecting cylinder 1 and extends to its upper end. A shifting block 111 is installed at the end of the rotating shaft 11. A connecting rod 143 corresponding to the inner cylinder 12 is provided at one end of the collecting cylinder 1 close to the shifting block 111. The connecting rod 143 is arranged to be lifted and lowered, and is installed with a sealing plug 145 for sealing the gas collecting bag 123. The shifting block 111 is driven to rotate by the switching motor 114, and is used to sequentially open the sealing plugs 145 of the gas collecting bag 123 to perform gas collection operations.

[0037] The cross-section of the sealing plug 145 is in an inverted cone shape, and a conical groove corresponding to the sealing plug 145 is opened on the fixing cover 122. The conical groove of the fixing cover 122 is connected to the interior of the air collecting bag 123, so that the sealing plug 145 can open the air collecting bag 123 by disengaging from the conical groove when rising to collect exhaust gas. When the sealing plug 145 sinks, the sealing plug 145 can seal the air collecting bag 123 by fitting with the conical groove.

[0038] As attached Figure 5 As shown, a sleeve rod 14 is provided at one side of the end of the inner cylinder 12, and a lifting rod 141 is slidably installed inside the sleeve rod 14, and the connecting rod 143 is connected to the end of the lifting rod 141, and a limiting plate is provided at one end of the lifting rod 141 located inside the sleeve rod 14, and a spring 142 is provided between the top inner side of the sleeve rod 14 and the limiting plate. By default, due to the action of the spring 142, the lifting rod 141 is dragged to drive the connecting rod 143 to sink, thereby causing the sealing plug 145 to block the air collecting bag 123, and a push rod 144 is provided at one end of the connecting rod 143 away from the sealing plug 145. A ball is embedded in the end of the push rod 144, and a chamfer is provided on one side of the shift block 111. When the shift block 111 is driven to rotate by the rotating shaft 11, the chamfered side pushes up the push rod 144 with the ball. During the rising process of the push rod 144, the connecting rod 143 is pulled to separate the sealing plug 145 from the fixed cover 122. At the same time, the lifting rod 141 compresses the spring 142. Once the shift block 111 continues to rotate and the push rod 144 leaves the shift block 111, the spring 142 is reset to drive the sealing plug 145 to press against the conical groove of the fixed cover 122 again, thereby sealing the air bag 123.

[0039] Further, in order to draw gas into the interior of the air bag 123, refer to the attached Figure 4 As shown, the end bearing of the inner cylinder 12 is connected to a rotating rod 13, and the external thread of the rotating rod 13 is connected to a telescopic rod 132. The end of the telescopic rod 132 is installed with a piston 133 placed in the inner cylinder 12 and sliding. The inner wall of the inner cylinder 12 is provided with a limit plate, and the outer side of the end of the telescopic rod 132 is provided with a limit groove corresponding to the limit plate. When the rotating rod 13 rotates, the telescopic rod 132 connected to its external thread will drive the piston 133 to move up and down in the inner cylinder 12. In the process of sinking of the piston 133, the internal space of the inner cylinder 12 increases, so that a certain negative pressure will be generated, which will suck the air collecting bag 123 downward, and then the external exhaust gas can be drawn into it by the air collecting bag 123 to complete the collection. When the internal exhaust gas needs to be discharged, the piston 133 can be moved upward.

[0040] It is worth noting that in order to switch different inner cylinders 12 to complete the collection and switching of exhaust gas at different stages, the end plate 112 is set in an elliptical shape, and a collection motor 113 is installed on the end plate 112 near the axial center of the collection cylinder 1, and a driving gear shaft 116 driven by the collection motor 113 is installed on the other end of the end plate 112. The end of the rotating rod 13 is sleeved with a transmission gear 131 meshing with the driving gear shaft 116. When the end plate 112 at the end of the rotating shaft 11 is driven by the switching motor 114 to rotate, the driving gear shaft 116 at its end will mesh with the transmission gear 131 of the rotating rod 13 in different directions in turn, thereby being able to switch the air collecting bags 123 in different inner cylinders 12 to collect exhaust gas.

[0041] Furthermore, a power supply and a PLC are also provided inside the bottom cover 2. The PLC is integrated with a communication module. The PLC is also electrically connected to various electrical components, receives requests from the terminal through the communication module (GPRS / wif / Bluetooth), and requests instructions to send instructions to the PLC model S4-400, so that it can control the activities of the output shafts of the collection motor 113 and the switching motor 114 in real time, thereby completing the operation of collecting exhaust gas at different stages.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas collection device for exhaust gas detection, characterized in that: It comprises a collecting tube and an end cover and a bottom cover respectively sleeved on the upper and lower parts of the collecting tube, a plurality of collecting bins are evenly distributed around the collecting tube, an inner tube is arranged inside the collecting bin, a connector is arranged on the top of the inner tube, a fixing cover is threadedly connected to the end of the connector, and an air collecting bag is screwed and fixed to the fixing cover through the connector and the fixing cover; A switching motor is installed inside the bottom cover, the output shaft of the switching motor is connected to an end plate, the top of the end plate is connected to a rotating shaft that penetrates the collection tube and extends to its upper end, a shift block is installed at the end of the rotating shaft, and a connecting rod corresponding to the inner tube is provided at one end of the collection tube close to the shift block, the connecting rod is arranged to be lifted and lowered, and a sealing plug for sealing the air collecting bag is installed; The cross section of the sealing plug is in an inverted cone shape, and a tapered groove corresponding to the sealing plug is provided on the fixing cover, and the tapered groove of the fixing cover is communicated with the interior of the air collecting bag.

2. A gas collection device for exhaust gas detection as claimed in claim 1, characterized in that: A sleeve rod is provided at one side of the end of the inner cylinder, a lifting rod is slidably installed inside the sleeve rod, the connecting rod is connected to the end of the lifting rod, and a limiting plate is provided at one end of the lifting rod inside the sleeve rod, and a spring is provided between the inner side of the top of the sleeve rod and the limiting plate.

3. A gas collection device for exhaust gas detection as claimed in claim 1, characterized in that: A push rod is arranged at one end of the connecting rod away from the sealing plug, a ball is embedded at the end of the push rod, and a chamfer is arranged on one side of the shifting block.

4. A gas collection device for exhaust gas detection as claimed in claim 1, characterized in that: The end bearing of the inner cylinder is connected with a rotating rod, the outer thread of the rotating rod is connected with a telescopic rod, and the end of the telescopic rod is installed with a piston placed in the inner cylinder and sliding; The inner wall of the inner cylinder is provided with a limiting plate, and the outer side of the end of the telescopic rod is provided with a limiting groove corresponding to the limiting plate.

5. A gas collection device for exhaust gas detection as claimed in claim 4, characterized in that: The end plate is elliptical in shape, a collecting motor is installed at the axial center of the end plate close to the collecting cylinder, a driving gear shaft driven by the collecting motor is installed at the other end of the end plate, and a transmission gear meshing with the driving gear shaft is sleeved at the end of the rotating rod.

6. A gas collection device for exhaust gas detection according to any one of claims 1 to 5, characterized in that: A power supply and a PLC are also provided inside the bottom cover. The PLC is integrated with a communication module and is also electrically connected to various electrical components.

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