Gas detection sample collection tool

Abstract

The utility model relates to the technical field of fixing brackets, in particular to a gas detection sample collection tool. The device comprises a collection cylinder and a piston push-pull rod, one end of the collection cylinder is provided with a filtering device, the filtering device comprises an external thread ring, one end of the external thread ring is fixedly connected with the collection cylinder, the arc surface of the external thread ring is in threaded connection with an internal thread ring, one end of the internal thread ring is fixedly connected with a conical pipe, and the conical pipe is fixedly connected with the piston push-pull rod. And a rubber backing ring is slidably connected to the interior of the conical pipe, a fixing ring is slidably connected to one end of the rubber backing ring, one end of the fixing ring is slidably connected with the external thread ring, and a dust filtering net is fixedly connected to the inner side of the fixing ring. The problems that in the gas collection process, dust in air cannot be filtered through a traditional gas detection sample collection tool, the content of dust in a collected gas sample is high, and the follow-up gas detection accuracy is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of fixed support technology, and in particular to a gas detection sample collection tool. Background Technology

[0002] To monitor atmospheric environmental quality, it is necessary to collect and test flue gas, ambient air, and production gases to determine whether they meet the specified standards and whether they pose a significant hazard to human health. If the content of a certain gas does not meet or exceeds the standard, corresponding actions must be taken to change its content in order to ensure a good environment or qualified products.

[0003] For example, publication number CN208984417U discloses a gas collection tool, which includes a collection cylinder, a push-pull rod, and a piston. The collection cylinder has an air inlet and an air outlet. An inlet check valve is installed on the air inlet, and an outlet check valve is installed on the air outlet. The piston is mounted on the first end of the push-pull rod, and the push-pull rod drives the piston to reciprocate within the collection cylinder to achieve gas entry and exit. Using this embodiment of the invention, the re-entry of discharged gas into the collection cylinder can be avoided, ensuring the amount of gas collected, greatly shortening the gas collection time, reducing the time rescue personnel or gas sampling personnel spend before sealing, increasing the safety factor, improving gas collection efficiency, and it is also simple to operate, easy to carry, safe and reliable, and widely applicable.

[0004] The aforementioned patent uses a push-pull rod to drive a piston to reciprocate within the collection cylinder to collect and discharge gas. However, it still has the drawback that it cannot filter dust in the air during the gas collection process, resulting in a high dust content in the collected gas sample and affecting the accuracy of subsequent gas detection. Therefore, a gas detection sample collection tool is needed that can filter dust from the collected gas to improve the accuracy of gas detection. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing gas detection sample collection tools, which cannot filter dust in the air during gas collection, and to propose a new gas detection sample collection tool.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gas detection sample collection tool, comprising a collection cylinder and a piston push-pull rod, wherein a filter device is provided at one end of the collection cylinder, the filter device comprising an external threaded ring, one end of the external threaded ring being fixedly connected to the collection cylinder, an internal threaded ring being threadedly connected to the arc surface of the external threaded ring, a tapered tube being fixedly connected to one end of the internal threaded ring, a rubber gasket ring being slidably connected inside the tapered tube, a fixing ring being slidably connected to one end of the rubber gasket ring, one end of the fixing ring being slidably connected to the external threaded ring, and a dust filter screen being fixedly connected to the inner side of the fixing ring.

[0007] The above components achieve the following effects: placing the fixing ring and rubber gasket ring inside the internal threaded ring, assembling the internal threaded ring and the external threaded ring, completing the installation and fixation of the fixing ring and rubber gasket ring, and filtering the air entering the collection cylinder by the dust filter screen.

[0008] Preferably, the inner side of the external threaded ring is provided with four guide grooves, and guide plates are slidably connected inside the guide grooves. One end of the four guide plates is fixedly connected to the fixing ring.

[0009] The effect achieved by the above components is that the guide plate and guide groove are assembled, which facilitates the accurate placement of the fixing ring.

[0010] Preferably, one end of the rubber gasket ring has four guide holes, and guide rods are slidably connected inside the guide holes. One end of the four guide rods is fixedly connected to the external threaded ring.

[0011] The effect achieved by the above components is that the guide hole and guide rod are assembled, which facilitates the accurate placement of the rubber gasket ring.

[0012] Preferably, the arc surface of the internal threaded ring is fixedly connected to an anti-slip sleeve, which is made of rubber.

[0013] The effect achieved by the above components is to increase friction by providing an anti-slip sleeve.

[0014] Preferably, the arc surface of the anti-slip sleeve is provided with a plurality of anti-slip grooves, and the plurality of anti-slip grooves are evenly distributed on the anti-slip sleeve.

[0015] The effect achieved by the above components is that the anti-slip grooves are formed on the anti-slip sleeve, further increasing the friction of the anti-slip sleeve.

[0016] Preferably, the outside of the collection tube is provided with a support device, which includes two fixing plates. The two fixing plates are fixedly connected to the collection tube on one side that is close to each other, and a sliding groove is provided on one side of the fixing plate.

[0017] The above components achieve the following effect: the fixed plate and the collection cylinder are fixed, and the sliding groove is opened on the fixed plate.

[0018] Preferably, a fixed rod is slidably connected inside the sliding groove.

[0019] The effect achieved by the above components is to limit the movement area of ​​the fixed rod by allowing it to slide within the sliding groove.

[0020] Preferably, one end of the fixing rod is fixedly connected to a connecting plate, and the ends of the two connecting plates that are close to each other are fixedly connected to a U-shaped plate.

[0021] The effect achieved by the above components is that the movement of the U-shaped plate drives the movement of the connecting plate, thereby moving the fixed rod.

[0022] Preferably, a bolt is slidably connected to one side of the U-shaped plate, and the arc surface of the bolt is threadedly connected to the piston push rod.

[0023] The effect achieved by the above components is that the U-shaped plate is positioned between the bolt and the piston push rod, and the bolt and piston push rod, after assembly, limit and fix the U-shaped plate.

[0024] In summary, the beneficial effects of this utility model are as follows:

[0025] In this invention, when it is necessary to filter dust in the gas during the gas collection process, the fixing ring and the rubber gasket ring are placed inside the inner threaded ring to assemble the inner threaded ring and the outer threaded ring, thus fixing the fixing ring and the rubber gasket ring. The dust filter screen filters the air entering the collection cylinder. Through the filtration device, the problem of traditional gas detection sample collection tools being unable to filter dust in the air during the gas collection process is solved.

[0026] In this invention, a support device is used to prevent deformation of the piston push-pull rod during reciprocating use. The U-shaped plate drives the connecting plate to move, causing the connecting plate to slide the fixed rod in the groove opened on the fixed plate, thus supporting and limiting the piston push-pull rod. This support device solves the problem that in traditional gas detection sample collection tools, the piston push-pull rod deforms during repeated reciprocating use, making it difficult for the collection tube to collect gas. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the filter structure of this utility model;

[0029] Figure 3This is an exploded structural diagram of the filter structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the support structure of this utility model.

[0031] Legend: 1. Collection tube; 2. Filtering device; 201. External threaded ring; 202. Fixing ring; 203. Rubber pad ring; 204. Internal threaded ring; 205. Tapered tube; 206. Dust filter screen; 207. Anti-slip sleeve; 208. Anti-slip groove; 209. Guide hole; 210. Guide rod; 211. Guide plate; 212. Guide groove; 3. Support device; 31. Fixing plate; 32. Sliding groove; 33. Fixing rod; 34. Connecting plate; 35. U-shaped plate; 36. Bolt; 4. Piston push rod. Detailed Implementation

[0032] Reference Figure 1 As shown, this utility model provides a technical solution: a gas detection sample collection tool, including a collection tube 1 and a piston push-pull rod 4, a filter device 2 is provided at one end of the collection tube 1, and a support device 3 is provided on the outside of the collection tube 1.

[0033] The specific setup and function of its filter device 2 and support device 3 will be described in detail below.

[0034] Reference Figure 2 and Figure 3As shown in this embodiment: the filter device 2 includes an external threaded ring 201, one end of which is fixedly connected to the collection cylinder 1. An internal threaded ring 204 is threadedly connected to the arc surface of the external threaded ring 201. A tapered tube 205 is fixedly connected to one end of the internal threaded ring 204. A rubber gasket ring 203 is slidably connected inside the tapered tube 205. A fixing ring 202 is slidably connected to one end of the rubber gasket ring 203. One end of the fixing ring 202 is slidably connected to the external threaded ring 201. A dust filter screen 206 is fixedly connected to the inner side of the fixing ring 202. This achieves the effect of placing the fixing ring 202 and the rubber gasket ring 203 inside the internal threaded ring 204, assembling the internal threaded ring 204 and the external threaded ring 201, completing the installation and fixation of the fixing ring 202 and the rubber gasket ring 203, and filtering the air entering the collection cylinder 1 by the dust filter screen 206. Four guide grooves 212 are provided on the inner side of the external threaded ring 201. Guide plates 211 are slidably connected inside the guide grooves 212, and one end of the four guide plates 211 is fixedly connected to the fixing ring 202. This achieves the effect of assembling the guide plates 211 and guide grooves 212, facilitating accurate placement of the fixing ring 202. Four guide holes 209 are provided at one end of the rubber pad ring 203. Guide rods 210 are slidably connected inside the guide holes 209, and one end of the four guide rods 210 is fixedly connected to the external threaded ring 201. This achieves the effect of assembling the guide holes 209 and guide rods 210, facilitating accurate placement of the rubber pad ring 203. An anti-slip sleeve 207, made of rubber, is fixedly connected to the arc surface of the internal threaded ring 204. This achieves the effect of increasing friction with the anti-slip sleeve 207. The anti-slip sleeve 207 has several anti-slip grooves 208 evenly distributed on its arc surface. This achieves the effect of increasing the friction of the anti-slip sleeve 207 by creating the anti-slip grooves 208 on its surface.

[0035] Reference Figure 4 As shown in this embodiment: the support device 3 includes two fixed plates 31. The two fixed plates 31 are fixedly connected to the collection cylinder 1 on their adjacent sides. A sliding groove 32 is provided on one side of the fixed plate 31. This achieves the effect of fixing the fixed plate 31 and the collection cylinder 1, and the sliding groove 32 is provided on the fixed plate 31. A fixed rod 33 is slidably connected inside the sliding groove 32. This achieves the effect of limiting the movement area of ​​the fixed rod 33 by allowing it to slide within the sliding groove 32. A connecting plate 34 is fixedly connected to one end of the fixed rod 33. A U-shaped plate 35 is fixedly connected to the adjacent ends of the two connecting plates 34. This achieves the effect of moving the U-shaped plate 35, causing the connecting plate 34 to move, and thus moving the fixed rod 33. A bolt 36 is slidably connected to one side of the U-shaped plate 35. The arc surface of the bolt 36 is threadedly connected to the piston push rod 4. This achieves the effect of positioning the U-shaped plate 35 between the bolt 36 and the piston push rod 4, and limiting and fixing the U-shaped plate 35 after the bolt 36 and the piston push rod 4 are assembled.

[0036] Working principle: When dust in the gas needs to be filtered during gas collection, the operator first installs the external threaded ring 201 to the inlet and outlet of the collection cylinder 1, and then slides the guide plate 211 fixed on the fixed ring 202 into the guide groove 212 to complete the assembly of the fixed ring 202. This allows the rubber pad ring 203 to move and be assembled by the guide hole 209 and guide rod 210. After assembly, the internal threaded ring 204 and the external threaded ring 201 are assembled to complete the installation of the rubber pad ring 203 and the fixed ring 202. When the gas is collected, the external gas passes through the dust filter 206, which filters the air entering the collection cylinder 1. Through the filter device 2, the problem of traditional gas detection sample collection tools not being able to filter dust in the air during gas collection, resulting in a high dust content in the collected gas sample and affecting the accuracy of subsequent gas detection, is solved.

[0037] With the support device 3, when it is necessary to prevent the piston push-pull rod 4 from deforming during reciprocating use, the operator first places the U-shaped plate 35 between the bolt 36 and the piston push-pull rod 4. After the bolt 36 and the piston push-pull rod 4 are assembled, the U-shaped plate 35 is limited and fixed. When the piston push-pull rod 4 moves, the U-shaped plate 35 drives the connecting plate 34 to move, so that the connecting plate 34 drives the fixing rod 33 to slide in the groove opened on the fixing plate 31, thus completing the support and limiting of the piston push-pull rod 4 and preventing the piston push-pull rod 4 from deforming. With the support device 3, the problem of the piston push-pull rod 4 deforming during repeated reciprocating use in a traditional gas detection sample collection tool, which makes it difficult for the collection tube 1 to collect gas, is solved.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A gas detection sample collection tool, comprising a collection tube (1) and a piston push-pull rod (4), characterized in that: One end of the collection cylinder (1) is provided with a filter device (2). The filter device (2) includes an external threaded ring (201). One end of the external threaded ring (201) is fixedly connected to the collection cylinder (1). The arc surface of the external threaded ring (201) is threaded with an internal threaded ring (204). One end of the internal threaded ring (204) is fixedly connected with a tapered tube (205). A rubber pad ring (203) is slidably connected inside the tapered tube (205). One end of the rubber pad ring (203) is slidably connected with a fixing ring (202). One end of the fixing ring (202) is slidably connected to the external threaded ring (201). A dust filter screen (206) is fixedly connected to the inner side of the fixing ring (202).

2. The gas detection sample collection tool according to claim 1, characterized in that: The inner side of the external threaded ring (201) is provided with four guide grooves (212), and guide plates (211) are slidably connected inside the guide grooves (212). One end of the four guide plates (211) is fixedly connected to the fixing ring (202).

3. The gas detection sample collection tool according to claim 2, characterized in that: The rubber pad ring (203) has four guide holes (209) at one end, and guide rods (210) are slidably connected inside the guide holes (209). One end of the four guide rods (210) is fixedly connected to the external threaded ring (201).

4. The gas detection sample collection tool according to claim 1, characterized in that: The arc surface of the internal threaded ring (204) is fixedly connected to an anti-slip sleeve (207), which is made of rubber.

5. A gas detection sample collection tool according to claim 4, characterized in that: The anti-slip sleeve (207) has a plurality of anti-slip grooves (208) on its arc surface, and the plurality of anti-slip grooves (208) are evenly distributed on the anti-slip sleeve (207).

6. The gas detection sample collection tool according to claim 1, characterized in that: The outside of the collection tube (1) is provided with a support device (3), which includes two fixing plates (31). The two fixing plates (31) are fixedly connected to the collection tube (1) on the side that is close to each other. A sliding groove (32) is provided on one side of the fixing plate (31).

7. A gas detection sample collection tool according to claim 6, characterized in that: The sliding groove (32) is internally slidably connected to a fixed rod (33).

8. A gas detection sample collection tool according to claim 7, characterized in that: One end of the fixed rod (33) is fixedly connected to a connecting plate (34), and the two connecting plates (34) are fixedly connected to a U-shaped plate (35) at their close ends.

9. A gas detection sample collection tool according to claim 8, characterized in that: A bolt (36) is slidably connected to one side of the U-shaped plate (35), and the arc surface of the bolt (36) is threadedly connected to the piston push rod (4).

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