Device for extracting gas under negative pressure

Abstract

The utility model relates to the technical field of gas extraction, in particular to negative pressure gas extraction equipment which comprises an installation frame, a negative pressure extraction device body and a fixing mechanism, the fixing mechanism comprises two fixing belts, a rotating disc, a worm, a worm gear, a rotating rod and a winding assembly, and when the negative pressure gas extraction device is used, the installation frame is placed on a gas conveying pipe; the two fixing belts are wound around the gas conveying pipe and connected to the winding assembly, the rotating disc is rotated, the rotating disc drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the rotating rod to rotate, the rotating rod drives the winding assembly to rotate, the winding assembly drives the fixing belts to be wound, and the negative pressure extraction device body on the mounting frame is fixed to the gas conveying pipe. Therefore, the problem that an existing negative pressure gas extraction device needs to be held by a hand to extract the gas during use is solved.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction technology, and in particular to a device for negative pressure gas extraction. Background Technology

[0002] Gas transportation often requires pipelines. During regular maintenance, it is often necessary to extract and sample the gas in the pipeline. In actual use, the existing gas negative pressure extraction device uses an air pump to drive a piston plate to move up and down inside the piston chamber. However, the piston plate lacks a limiting structure in the piston chamber, which can easily lead to unstable piston plate movement and unstable sampling process. Furthermore, the sampling device cannot observe and control the gas flow rate in real time during the sampling process, making it inconvenient for staff to perform accurate sampling.

[0003] Currently, existing technology (CN 221322606 U) discloses a gas negative pressure extraction device, including a fixed base. An extraction assembly is mounted on the upper surface of the fixed base. Four support frames are fixedly connected to the upper surface of the fixed base, and extraction cylinders are fixedly connected to the tops of the four support frames. A piston pusher is slidably mounted on the inner wall of the extraction cylinder, and a push-pull rod is fixedly connected to the side of the piston pusher. This invention, by setting up the extraction assembly, uses a drive motor to move the push-pull rod outward during gas sampling. This, in turn, drives the piston pusher inside the extraction cylinder to draw the gas into the cylinder. The gas flow rate is then observed using a gas flow meter on the extraction pipe. The drive motor then moves the push-pull rod in the opposite direction, outputting the gas through an exhaust pipe to an external sampling collection container. This achieves automatic gas collection, offering high stability and allowing operators to accurately control the sampling volume.

[0004] Using the above method, when using it, the staff needs to connect the collection port of the negative pressure extraction device to the collection port of the gas pipe and then hold the negative pressure extraction device to extract the gas, which increases the workload of the staff and reduces the practicality of the negative pressure extraction device. Utility Model Content

[0005] The purpose of this invention is to provide a negative pressure gas extraction device, which aims to solve the problem that existing negative pressure gas extraction devices require manual gas extraction during use.

[0006] To achieve the above objectives, this utility model provides a negative pressure gas extraction device, including a mounting frame, a negative pressure extraction device body, and a fixing mechanism. The fixing mechanism includes two fixing belts, a turntable, a worm gear, a worm wheel, a rotating rod, and a winding assembly.

[0007] The negative pressure extraction device body is mounted on the mounting frame. The two fixing belts are respectively fixedly connected to the mounting frame and are located on one side of the mounting frame. The turntable is rotatably connected to the mounting frame and is located on the side of the mounting frame away from the fixing belts. The worm gear is rotatably connected to the mounting frame and fixedly connected to the turntable. The worm wheel meshes with the worm gear and is rotatably connected to the mounting frame. The rotating rod is fixedly connected to the worm wheel and rotatably connected to the mounting frame. The winding assembly is mounted on the mounting frame.

[0008] The winding assembly includes an installation roller and two retaining rings. The installation roller is fixedly connected to the rotating rod and is located on one side of the installation roller. The two retaining rings are respectively fixedly connected to the installation roller and are located on the installation roller.

[0009] The fixing mechanism further includes a handle and an anti-slip sleeve. The handle is fixedly connected to the turntable and is located on the side of the turntable away from the worm gear. The anti-slip sleeve is fixedly connected to the handle and is located around the handle.

[0010] The fixing mechanism further includes a locking block and a return spring. The locking block is slidably connected to the mounting bracket and located on one side of the mounting bracket. The return spring is fixedly connected to the locking block and the mounting bracket, and is located between the locking block and the mounting bracket.

[0011] The fixing mechanism further includes an arc-shaped plate and a friction pad. The arc-shaped plate is fixedly connected to the mounting frame and is located at the bottom of the mounting frame. The friction pad is fixedly connected to the arc-shaped plate and is located on the side of the arc-shaped plate away from the mounting frame.

[0012] This utility model discloses a negative pressure gas extraction device. The mounting frame provides installation conditions for the negative pressure gas extraction device body and the fixing mechanism. The negative pressure gas extraction device body can extract gas. In use, the mounting frame is placed on the gas transmission pipe, the two fixing straps are wrapped around the gas transmission pipe and connected to the winding assembly. The turntable is rotated, which drives the worm gear to rotate, the worm gear drives the worm wheel to rotate, the worm wheel drives the rotating rod to rotate, the rotating rod drives the winding assembly to rotate, and the winding assembly drives the fixing straps to wind up. The negative pressure gas extraction device body on the mounting frame is fixed to the gas transmission pipeline, and the negative pressure gas extraction device body can then be used to extract gas, thus solving the problem that existing negative pressure gas extraction devices require manual gas extraction during use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the structure of a negative pressure gas extraction device according to this utility model.

[0015] Figure 2 This is a cross-sectional view of a negative pressure gas extraction device according to this utility model.

[0016] Figure 3 This is a side view of a negative pressure gas extraction device according to this utility model.

[0017] In the diagram: 1-mounting frame, 2-negative pressure extraction device body, 3-fixing belt, 4-turntable, 5-worm gear, 6-worm wheel, 7-rotating rod, 8-mounting roller, 9-fixing ring, 10-handle, 11-anti-slip sleeve, 12-clamping block, 13-reset spring, 14-arc plate, 15-friction pad. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] Please see Figures 1-3 This utility model provides a negative pressure gas extraction device, including a mounting frame 1, a negative pressure extraction device body 2 and a fixing mechanism. The fixing mechanism includes two fixing belts 3, a turntable 4, a worm gear 5, a worm wheel 6, a rotating rod 7 and a winding assembly.

[0020] The negative pressure extraction device body 2 is mounted on the mounting frame 1. The two fixing belts 3 are respectively fixedly connected to the mounting frame 1 and are located on one side of the mounting frame 1. The turntable 4 is rotatably connected to the mounting frame 1 and is located on the side of the mounting frame 1 away from the fixing belts 3. The worm gear 5 is rotatably connected to the mounting frame 1 and fixedly connected to the turntable 4. The worm wheel 6 meshes with the worm gear 5 and is rotatably connected to the mounting frame 1. The rotating rod 7 is fixedly connected to the worm wheel 6 and rotatably connected to the mounting frame 1. The winding assembly is mounted on the mounting frame 1.

[0021] In this embodiment, the mounting frame 1 provides installation conditions for the negative pressure extraction device body 2 and the fixing mechanism. The negative pressure extraction device body 2 can extract gas. In use, the mounting frame 1 is placed on the gas transmission pipe, the two fixing straps 3 are wrapped around the gas transmission pipe and connected to the winding assembly, the turntable 4 is rotated, the turntable 4 drives the worm gear 5 to rotate, the worm gear 5 drives the worm wheel 6 to rotate, the worm wheel 6 drives the rotating rod 7 to rotate, the rotating rod 7 drives the winding assembly to rotate, and the winding assembly drives the fixing straps 3 to wind up, thus fixing the negative pressure extraction device body 2 on the mounting frame 1 to the gas transmission pipeline. The negative pressure extraction device body 2 can then be used to extract gas, thereby solving the problem that existing negative pressure gas extraction devices require manual gas extraction during use.

[0022] Furthermore, the winding assembly includes a mounting roller 8 and two fixing rings 9. The mounting roller 8 is fixedly connected to the rotating rod 7 and is located on one side of the mounting roller 8. The two fixing rings 9 are respectively fixedly connected to the mounting roller 8 and are respectively located on the mounting roller 8.

[0023] In this embodiment, the mounting roller 8 provides mounting conditions for the two fixing rings 9, and the two fixing rings 9 can be used to connect the two fixing belts 3.

[0024] Furthermore, the fixing mechanism also includes a grip 10 and an anti-slip sleeve 11. The grip 10 is fixedly connected to the turntable 4 and is located on the side of the turntable 4 away from the worm gear 5. The anti-slip sleeve 11 is fixedly connected to the grip 10 and is located around the grip 10.

[0025] In this embodiment, the grip 10 provides the installation conditions for the anti-slip sleeve 11, and holding the grip 10 can drive the turntable 4 to rotate.

[0026] Furthermore, the fixing mechanism also includes a locking block 12 and a return spring 13. The locking block 12 is slidably connected to the mounting bracket 1 and is located on one side of the mounting bracket 1. The return spring 13 is fixedly connected to the locking block 12 and the mounting bracket 1, and is located between the locking block 12 and the mounting bracket 1.

[0027] In this embodiment, the turntable 4 has multiple locking holes. The locking block 12, in conjunction with the corresponding locking hole, can limit the turntable 4. The rebound force of the reset spring 13 can spring the locking block 12 into the corresponding locking hole.

[0028] Furthermore, the fixing mechanism also includes an arc-shaped plate 14 and a friction pad 15. The arc-shaped plate 14 is fixedly connected to the mounting frame 1 and is located at the bottom of the mounting frame 1. The friction pad 15 is fixedly connected to the arc-shaped plate 14 and is located on the side of the arc-shaped plate 14 away from the mounting frame 1.

[0029] In this embodiment, the arc plate 14 provides installation conditions for the friction pad 15. The arc plate 14 can fit with the transmission pipe, and the friction pad 15 can increase the friction between the arc plate 14 and the transmission pipe, thereby improving the stability when installed on the mounting frame 1.

[0030] In use, the mounting frame 1 is placed on the gas transmission pipe, the two fixing straps are wrapped around the gas transmission pipe and connected to the two fixing rings 9, the handle 10 is held and the turntable 4 is rotated, the turntable 4 drives the worm gear 5 to rotate, the worm gear 5 drives the worm wheel 6 to rotate, the worm wheel 6 drives the rotating rod 7 to rotate, the rotating rod 7 drives the mounting roller 8 to rotate, the mounting roller 8 drives the two fixing rings 9 to rotate, and the two fixing rings 9 drive the two fixing straps 3 to wind up, thus fixing the negative pressure extraction device body 2 on the mounting frame 1 to the gas transmission pipeline. The negative pressure extraction device body 2 can then be used to extract gas, thereby solving the problem that existing negative pressure gas extraction devices require manual gas extraction during use.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A device for negative pressure gas extraction, comprising a mounting frame and a negative pressure extraction device body, wherein the negative pressure extraction device body is mounted on the mounting frame, characterized in that, It also includes a fixing mechanism, which comprises two fixing belts, a turntable, a worm gear, a worm wheel, a rotating rod, and a winding assembly; The two fixing belts are respectively fixedly connected to the mounting frame and are both located on one side of the mounting frame. The turntable is rotatably connected to the mounting frame and is located on the side of the mounting frame away from the fixing belts. The worm gear is rotatably connected to the mounting frame and fixedly connected to the turntable. The worm wheel meshes with the worm gear and is rotatably connected to the mounting frame. The rotating rod is fixedly connected to the worm wheel and rotatably connected to the mounting frame. The winding assembly is mounted on the mounting frame.

2. The negative pressure gas extraction equipment as described in claim 1, characterized in that, The winding assembly includes an mounting roller and two retaining rings. The mounting roller is fixedly connected to the rotating rod and is located on one side of the mounting roller. The two retaining rings are respectively fixedly connected to the mounting roller and are located on the mounting roller.

3. The negative pressure gas extraction equipment as described in claim 1, characterized in that, The fixing mechanism also includes a handle and an anti-slip sleeve. The handle is fixedly connected to the turntable and is located on the side of the turntable away from the worm gear. The anti-slip sleeve is fixedly connected to the handle and is located around the handle.

4. The negative pressure gas extraction equipment as described in claim 1, characterized in that, The fixing mechanism further includes a locking block and a return spring. The locking block is slidably connected to the mounting bracket and located on one side of the mounting bracket. The return spring is fixedly connected to the locking block and the mounting bracket, and is located between the locking block and the mounting bracket.

5. The negative pressure gas extraction equipment as described in claim 1, characterized in that, The fixing mechanism further includes an arc-shaped plate and a friction pad. The arc-shaped plate is fixedly connected to the mounting frame and is located at the bottom of the mounting frame. The friction pad is fixedly connected to the arc-shaped plate and is located on the side of the arc-shaped plate away from the mounting frame.

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