Handheld small chain saw with catalyst silencer structure

Abstract

The utility model discloses a hand-held small chain saw with a catalyst silencer structure, which comprises a hand-held small chain saw body, one end of an engine exhaust port of the hand-held small chain saw body is communicated and provided with an air pipe, the outer surface of the air pipe is provided with threads, and the outer surface of the air pipe is provided with a silencing and purifying mechanism in a threaded manner. Through the design of the noise reduction and purification mechanism, waste gas can be firstly purified and then subjected to noise reduction, so that the dual purposes of environmental protection and noise reduction are achieved, harmful gas in the waste gas is converted in advance, emission of atmospheric pollutants is reduced, a noise reduction part is prevented from being corroded, the service life of equipment is prolonged, and the environmental protection and noise reduction effects are achieved. Meanwhile, the noise of the working environment is reduced through the stable noise reduction effect, a healthy and low-noise working space is created for a user, the communication efficiency is effectively improved, potential safety hazards are reduced, and the requirements for environmental protection and use are met in an all-around mode.

Description

Technical Field

[0001] This utility model relates to the field of chainsaw technology, specifically a handheld mini chainsaw with a catalyst silencer structure. Background Technology

[0002] Chainsaws use an engine as a power source to drive a saw chain, which in turn uses the lateral movement of the staggered blades on the chain to perform a cutting action, thus achieving efficient clearing of tree obstacles. However, there is a problem with the use of chainsaws: the operation of the chainsaw engine generates a lot of noise, and long-term exposure to this noise environment can cause harm to the human body.

[0003] For example, the national authorized patent announcement number CN211881459U discloses a silent chainsaw, which includes a chainsaw body, a saw blade, and a silencer. The drive end of the chainsaw body is connected to the saw blade, and the silencer is located on the chainsaw body. The chainsaw body drives the saw blade, and the silencer reduces the noise generated by the chainsaw body during the driving state. This application reduces the noise generated by the chainsaw body during use by using a silencer, avoiding potential harm to the human body caused by long-term work in a noisy environment. It also creates a low-noise environment at the work site where smooth communication is possible, facilitating communication between rope handlers and fellers, and avoiding the risk of injury caused by trees falling.

[0004] However, while the aforementioned silencer chainsaws silence the exhaust fumes from the engine, they cannot simultaneously convert harmful gases such as carbon monoxide and hydrocarbons in the exhaust fumes into harmless substances for release. The release of harmful gases such as carbon monoxide and hydrocarbons into the atmosphere will cause air pollution, and the hydrocarbons will form photochemical smog, which will also harm the ecological environment and human health. Utility Model Content

[0005] The purpose of this invention is to provide a handheld mini chainsaw with a catalytic muffler structure to solve the problem mentioned in the background art that, during the process of mufflerizing engine exhaust, harmful gases such as carbon monoxide and hydrocarbons in the exhaust cannot be converted into harmless substances for discharge.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A handheld mini chainsaw with a catalytic muffler structure includes: a handheld mini chainsaw body, one end of the engine exhaust port of the handheld mini chainsaw body is connected to an air pipe, and the outer surface of the air pipe is threaded and a muffler and purification mechanism is threadedly installed.

[0008] Preferably, the noise reduction and purification mechanism includes a U-shaped tube, with a sealing disc fixedly installed at one end of the U-shaped tube. A nut cap is slidably fitted on the outer surface of the sealing disc, and the nut cap also slides on the outer surface of the U-shaped tube, so that the U-shaped tube can be connected to the air pipe by being threaded onto the outer surface of the air pipe through the nut cap.

[0009] Preferably, both ends of the sealing disc are provided with sealing rings, so that when the nut cap is threaded onto the outer surface of the air tube, the nut cap will press against the sealing ring of the sealing disc as it slides on one end of the U-shaped tube. The sealing disc pressed by the nut cap will then cause the sealing ring at the other end to press against one end of the air tube.

[0010] Preferably, the other end of the U-shaped tube is connected to a purification tube, and three sets of ceramic filter tubes are fixedly installed inside the purification tube. The three sets of ceramic filter tubes are respectively filled with platinum-alumina catalyst, vanadium-titanium catalyst and zinc oxide-calcium oxide composite catalyst.

[0011] Preferably, a silencer tube is fixedly installed at one end of the purification tube, and multiple sets of conical disc tubes are fixedly installed inside the silencer tube. The multiple sets of conical disc tubes are connected to the purification tube. Each set of conical disc tubes has an air hole in the recessed part of its outer surface. The air hole in the outer surface of each set of conical disc tubes is connected to the silencer tube. The silencer tube can be inserted into the bracket and supported inside. The bracket is fixedly installed on the lower surface of the handheld small chainsaw body.

[0012] Preferably, when the exhaust gas flows from the purification pipe into the conical coil, the airflow will enter the internal space of the silencer pipe through the air holes opened in the recessed part of the outer surface of the conical coil. During this process, the high-speed airflow will have intense friction with the air hole wall and the inner wall of the silencer pipe. The internal friction between gas molecules and the friction between the gas and the pipe wall will convert sound energy into heat energy, thereby continuously losing sound energy and reducing the intensity of the sound.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The design of the handheld mini chainsaw body, bracket, air hose, and silencer / purification mechanism allows for efficient use. The silencer / purification mechanism is inserted into the bracket and aligned with the air hose, then threaded together. When the handheld mini chainsaw is started, exhaust gas is discharged through the air hose into the silencer / purification mechanism. The mechanism first uses an internal catalyst to convert harmful gases in the exhaust gas. The exhaust gas, after being treated by the catalyst, then re-enters the silencer / purification mechanism to reduce noise before finally being discharged from its outlet. This design sequence purifies the exhaust gas before silencing it, achieving both environmental protection and noise reduction. Furthermore, the pre-conversion of harmful gases reduces air pollutant emissions, prevents corrosion of the silencer components, extends the equipment's lifespan, and avoids secondary pollution. Simultaneously, the stable silencing effect reduces ambient noise, creating a healthy, low-noise workspace for users, effectively improving communication efficiency, reducing safety hazards, and comprehensively meeting environmental protection and usage requirements.

[0015] 2. The design of the sealing disc, nut cap, purification tube, silencer tube, and conical disc tube allows the operator to insert the silencer tube into the bracket mounted on the lower surface of the handheld mini chainsaw. Simultaneously, the sealing disc at one end of the U-shaped tube is aligned with the air hose. The operator can then push and rotate the nut cap, threaded onto the outer surface of the air hose. As the nut cap slides along the outer surface of the U-shaped tube, it presses against the sealing ring of the sealing disc. This pressure from the nut cap, in turn, causes the sealing ring at the other end to press against one end of the air hose, creating a perfect seal between the U-shaped tube and the air hose. The handheld mini chainsaw can then be started. The exhaust gas is discharged into the purification pipe through the air pipe and U-shaped pipe. The three sets of ceramic filter tubes installed in the purification pipe will purify the harmful substances in the exhaust gas in sequence through the platinum-alumina catalyst, vanadium-titanium catalyst and zinc oxide-calcium oxide composite catalyst filled inside. The purified exhaust gas can then enter the multiple sets of conical disc tubes in the silencer pipe. When the airflow carrying noise enters the gap space of the silencer pipe through the air holes opened on the outer surface of the conical disc tube, it will cause strong friction with the air hole wall and the inner wall of the silencer pipe through the high-speed airflow. In this process, the friction between gas molecules and between the gas and the pipe wall will convert sound energy into heat energy, effectively reducing the noise intensity, especially the high-frequency noise reduction effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the bracket structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the noise reduction and purification mechanism of this utility model.

[0019] In the diagram: 1. Handheld mini chainsaw body; 101. Bracket; 102. Air pipe; 2. Noise reduction and purification mechanism; 201. U-shaped pipe; 202. Sealing disc; 203. Nut cap; 204. Purification pipe; 205. Noise reduction pipe; 206. Conical disc pipe; 207. Ceramic filter pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1 As shown, this embodiment provides a handheld mini chainsaw with a catalytic muffler structure, including: a handheld mini chainsaw body 1, an air pipe 102 connected to one end of the engine exhaust port of the handheld mini chainsaw body 1, and a muffler and purification mechanism 2 threaded on the outer surface of the air pipe 102.

[0022] The design of the handheld mini chainsaw body 1, bracket 101, air hose 102, and silencer / purification mechanism 2 allows for efficient use. The silencer / purification mechanism 2 is inserted into the bracket 101 and aligned with the air hose 102. The silencer / purification mechanism 2 and the air hose 102 are then threaded together. When the handheld mini chainsaw body 1 is started, exhaust gas is discharged through the air hose 102 into the silencer / purification mechanism 2. The silencer / purification mechanism 2 first uses an internal catalyst to convert harmful gases in the exhaust gas. The exhaust gas, after being treated by the catalyst converter, then enters the silencer / purification machine. The noise is reduced in structure 2, and the exhaust gas is finally discharged from the outlet of the silencing and purification mechanism 2. This design sequence allows for the purification of exhaust gas before silencing, achieving the dual goals of environmental protection and noise reduction. Furthermore, by pre-converting harmful gases in the exhaust gas, the emission of air pollutants is reduced, corrosion of the silencing components is prevented, the service life of the equipment is extended, and secondary pollution is avoided. At the same time, the stable silencing effect reduces the noise in the working environment, creating a healthy and low-noise working space for users, effectively improving communication efficiency, reducing safety hazards, and comprehensively meeting environmental protection and usage needs.

[0023] like Figures 2-3As shown, the noise reduction and purification mechanism 2 includes a U-shaped tube 201. A sealing plate 202 is fixedly installed at one end of the U-shaped tube 201. A nut cap 203 is slidably fitted on the outer surface of the sealing plate 202, and the nut cap 203 slides on the outer surface of the U-shaped tube 201 at the same time, so that the U-shaped tube 201 can be connected to the air pipe 102 by threading the nut cap 203 onto the outer surface of the air pipe 102.

[0024] The sealing disc 202 has sealing rings at both ends. When the nut cap 203 is threaded onto the outer surface of the air tube 102, the nut cap 203 will press against the sealing ring of the sealing disc 202 as it slides against the outer surface of the U-shaped tube 201. The sealing disc 202, which is pressed by the nut cap 203, will cause the sealing ring at the other end to press against one end of the air tube 102. The other end of the U-shaped tube 201 is connected to a purification tube 204. Three sets of ceramic filter tubes 207 are fixedly installed inside the purification tube 204. The three sets of ceramic filter tubes 207 are respectively filled with platinum-alumina catalyst, vanadium-titanium catalyst and zinc oxide-calcium oxide composite catalyst.

[0025] Among them, a silencer pipe 205 is fixedly installed at one end of the purification pipe 204. Multiple sets of conical disc pipes 206 are fixedly installed inside the silencer pipe 205. The multiple sets of conical disc pipes 206 are connected to the purification pipe 204. Air holes are opened in the recessed part of the outer surface of each set of conical disc pipes 206. The air holes opened on the outer surface of each set of conical disc pipes 206 are connected to the silencer pipe 205. The silencer pipe 205 can be inserted into the bracket 101 and supported therein. The bracket 101 is fixedly installed on the lower surface of the handheld small chainsaw body 1.

[0026] When exhaust gas flows from the purification pipe 204 into the conical coil 206, the airflow enters the internal space of the silencer pipe 205 through the air holes opened in the recessed part of the outer surface of the conical coil 206. During this process, the high-speed airflow rubs violently against the air hole wall and the inner wall of the silencer pipe 205. The internal friction between gas molecules and the friction between the gas and the pipe wall will convert sound energy into heat energy, thereby continuously losing sound energy and reducing the intensity of the sound.

[0027] Through the design of the sealing disc 202, nut cap 203, purification tube 204, silencer tube 205, and conical disc tube 206, during use, the operator can insert the silencer tube 205 into the bracket 101 mounted on the lower surface of the handheld mini chainsaw body 1. Simultaneously, the sealing disc 202 at one end of the U-shaped tube 201 is aligned with the air tube 102. Then, the operator can push and rotate the nut cap 203 to install it threaded onto the outer surface of the air tube 102. When the nut cap 203 is threaded onto the outer surface of the air tube 102, it will press against the sealing ring of the sealing disc 202 as it slides against the outer surface of the U-shaped tube 201. The sealing disc 202, pressed by the nut cap 203, will then cause the sealing ring at the other end to press against one end of the air tube 102, thus achieving an absolute seal between the U-shaped tube 201 and the air tube 102. Then, when the handheld mini chainsaw body 1 is started, the exhaust gas can be discharged into the purification pipe 204 through the air pipe 102 and the U-shaped pipe 201. The three sets of ceramic filter pipes 207 installed in the purification pipe 204 will purify the harmful substances in the exhaust gas in sequence through the platinum-alumina catalyst, vanadium-titanium catalyst and zinc oxide-calcium oxide composite catalyst filled inside. The purified exhaust gas can then enter the multiple sets of conical disc tubes 206 in the silencer pipe 205. When the airflow carrying noise enters the gap space of the silencer pipe 205 through the air holes opened on the outer surface of the conical disc tubes 206, it will cause strong friction with the air hole wall and the inner wall of the silencer pipe 205 through the high-speed airflow. In this process, the friction between gas molecules and between the gas and the pipe wall will convert sound energy into heat energy, effectively reducing the noise intensity, especially the reduction effect of high frequency noise is significant.

[0028] Based on the above technical solution, the working steps of this solution are summarized as follows: During use, the operator inserts the silencer tube 205 into the bracket 101 mounted on the lower surface of the handheld mini chainsaw body 1. Simultaneously, the sealing disc 202 at one end of the U-shaped tube 201 is aligned with the air pipe 102. Then, the operator can push and rotate the nut cap 203 to install it on the outer surface of the air pipe 102. When the nut cap 203 is installed on the outer surface of the air pipe 102, it will protrude from the outer surface of the U-shaped tube 201. During the sliding process towards one end, the U-shaped tube 201 presses against the sealing ring of the sealing disc 202. Meanwhile, the sealing disc 202, pressed by the nut cap 203, causes the sealing ring at the other end to press against one end of the air pipe 102, thus achieving an absolute seal between the U-shaped tube 201 and the air pipe 102. Subsequently, when the handheld mini chainsaw body 1 is started, exhaust gas can be discharged into the purification pipe 204 through the air pipe 102 and the U-shaped tube 201. The three sets of ceramic filter tubes 207 installed inside the purification pipe 204 will then pass through the platinum-alumina catalyst filled inside. The waste gas is purified sequentially using a platinum-alumina catalyst, a vanadium-titanium catalyst, and a zinc oxide-calcium oxide composite catalyst. The first group, containing platinum-alumina catalyst, oxidizes carbon monoxide to carbon dioxide and hydrocarbons to carbon dioxide and water. The second group, a vanadium-titanium catalyst, reduces nitrogen oxides to nitrogen and water under the action of ammonia. The third group, a zinc oxide-calcium oxide composite catalyst, reacts with sulfur dioxide to generate solid substances such as zinc sulfite, zinc sulfate, calcium sulfite, and calcium sulfate, thus removing sulfur oxides. After purification, the waste gas enters the multiple conical coils 206 within the silencer 205. When the noise-carrying airflow enters the gap space of the silencer 205 through pores on the outer surface of the conical coils 206, it experiences intense friction against the pore walls and the inner wall of the silencer 205. During this process, the friction between gas molecules and between the gas and the pipe wall converts sound energy into heat energy, effectively reducing noise intensity. Finally, the waste gas is discharged from the silencer 205.

[0029] In summary, this handheld mini chainsaw first purifies the exhaust gas and then reduces its noise, achieving the dual goals of environmental protection and noise reduction. Furthermore, by pre-converting harmful gases in the exhaust, it reduces the emission of air pollutants, prevents corrosion of the noise-reducing components, and extends the equipment's lifespan. Simultaneously, the stable noise reduction effect lowers the noise level in the working environment, creating a healthy and low-noise workspace for users, effectively improving communication efficiency, reducing safety hazards, and comprehensively meeting both environmental protection and usage needs.

[0030] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A handheld mini chainsaw with a catalytic silencer structure, characterized in that, include: The handheld mini chainsaw body (1) has an air pipe (102) connected to one end of the engine exhaust port of the handheld mini chainsaw body (1). The outer surface of the air pipe (102) is threaded and a noise reduction and purification mechanism (2) is threadedly installed. The noise reduction and purification mechanism (2) includes a U-shaped tube (201), and a purification tube (204) is connected to the other end of the U-shaped tube (201). A noise reduction tube (205) is fixedly installed at one end of the purification tube (204). Multiple sets of conical disc tubes (206) are fixedly installed inside the noise reduction tube (205). The multiple sets of conical disc tubes (206) are connected to the purification tube (204). Air holes are opened in the recessed part of the outer surface of each set of conical disc tubes (206). The air holes opened in the outer surface of each set of conical disc tubes (206) are connected to the noise reduction tube (205). The noise reduction tube (205) can be inserted into the bracket (101) and supported inside. The bracket (101) is fixedly installed on the lower surface of the handheld small chainsaw body (1).

2. A handheld mini chainsaw with a catalytic silencer structure according to claim 1, characterized in that: A sealing disc (202) is fixedly installed at one end of the U-shaped tube (201). A nut cap (203) is slidably fitted on the outer surface of the sealing disc (202), and the nut cap (203) slides on the outer surface of the U-shaped tube (201) at the same time, so that the U-shaped tube (201) can be connected to the air pipe (102) by threading the nut cap (203) onto the outer surface of the air pipe (102).

3. A handheld mini chainsaw with a catalytic silencer structure according to claim 2, characterized in that: Both ends of the sealing disc (202) are provided with sealing rings. When the nut cap (203) is threaded onto the outer surface of the air pipe (102), the nut cap (203) will press against the sealing ring of the sealing disc (202) as it slides against the outer surface of the U-shaped tube (201). The sealing disc (202) pressed by the nut cap (203) will cause the sealing ring at the other end to press against one end of the air pipe (102).

4. A handheld mini chainsaw with a catalytic silencer structure according to claim 2, characterized in that: The purification tube (204) is fixedly installed with three sets of ceramic filter tubes (207), and the three sets of ceramic filter tubes (207) are respectively filled with platinum-alumina catalyst, vanadium-titanium catalyst and zinc oxide-calcium oxide composite catalyst.

Images