Forklift silencer with tail gas purification function

Abstract

The utility model discloses a forklift muffler with a tail gas purification function, which relates to the technical field of mufflers and comprises a muffling component, a muffling shell, a cake-shaped purification component and a purification shell fixed at one end, close to a tail gas inlet side, of the muffling shell. A plurality of first sound holes are formed in the side, close to the purification shell, of the silencing shell at equal intervals along the circumferential side, a sliding ring is slidably attached to the inner wall of the side, close to the purification shell, of the silencing shell in the axial direction, and a plurality of second sound holes are formed in the sliding ring at equal intervals. Along with the increase of the use time and the increase of the tail gas treatment amount, the internal resistance of the cake-shaped purification assembly can be gradually increased, the cake-shaped purification assembly is promoted to push the sliding ring until the second sound hole coincides with the first sound hole, and at the moment, part of purified tail gas overflows from the second sound hole and the first sound hole and does not have the silencing effect of the silencing assembly; at the moment, the exhaust emission volume is obviously increased, and a worker can be well prompted to replace or clean the cake-shaped purification assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of muffler, especially a forklift muffler with tail gas purification function. BACKGROUND

[0002] Forklifts are commonly used handling equipment in the industrial field and are widely used in various factories, warehouses and other places. However, a forklift engine generates a large amount of tail gas when it is running, and the main function of the traditional forklift muffler is to reduce the noise generated by the engine exhaust, and the effect of tail gas purification is minimal. Since the tail gas contains harmful substances such as carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx) and particulate matter, these pollutants not only cause serious pollution to the environment, but also endanger the health of the operators and the surrounding personnel. Therefore, the muffler needs to be combined with the purification structure.

[0003] After searching, for example, patent announcement No. CN222010330U provides a muffler with a post-processing muffler structure, which includes a shell, a cover plate, a catalytic purification module, and a mounting mechanism. The cover plate is fixedly installed on the top of the shell by bolts. The catalytic purification module is arranged inside the shell for purifying automobile exhaust. The mounting mechanism is arranged inside the shell for disassembling and assembling the catalytic purification module. The mounting mechanism includes a connecting pipe one, a threaded sleeve one, a connecting pipe two and a threaded sleeve two. The utility model installs the shell to the appropriate position, the catalytic purification module purifies the exhaust gas discharged from the inlet pipe, and when the catalytic purification module needs to be replaced or cleaned after long-term use, the cover plate is opened, and the threaded sleeve two and the threaded sleeve one on the left and right sides of the catalytic purification module are twisted. The catalytic purification module can be removed, thereby facilitating its replacement or cleaning.

[0004] Based on the above search, combined with the prior art, it is found that the muffler with a purification structure similar to the above disclosed in the prior art lacks effective reminding function. With the increase of use time and the amount of treated tail gas, its purification effect will gradually decrease, and the operator will not know when to replace the purification device. Often, it is not until the abnormal exhaust emission is found that the problem is realized. This not only delays the replacement of the purification device, but also may cause damage to other parts of the forklift due to the tail gas problem. Therefore, a forklift muffler with tail gas purification function is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The purpose of the present application is to provide a forklift muffler with tail gas purification function to solve the problems raised in the background art.

[0006] To achieve the above object, the application provides the following technical scheme: a forklift silencer with tail gas purification function, comprising a silencing shell with a silencing assembly and a purification shell with a circular cake-shaped purification assembly, the purification shell is fixed to one end of the silencing shell close to the tail gas entering side, and the circumferential side of the circular cake-shaped purification assembly is slidingly attached to the inner wall of the purification shell;

[0007] A plurality of first sound holes are arranged equidistantly on the side of the silencing shell close to the purification shell along the circumferential side thereof, a sliding ring is arranged on the inner wall of the side of the silencing shell close to the purification shell along the axial direction thereof, a plurality of second sound holes are arranged equidistantly on the sliding ring, and in the initial state, the sliding ring covers the first sound holes, and the second sound holes are located between the first sound holes and the purification shell.

[0008] A compression spring is fixed between the compression ring close to the circular cake-shaped purification assembly and the inner wall of the side of the purification shell close to the silencing shell.

[0009] As a further supplement to the present scheme, a plurality of protrusions are fixed equidistantly on the end face of the compression ring away from the sliding ring.

[0010] As a further supplement to the present scheme, a limiting sliding block is integrally arranged on the outer wall of the sliding ring along the axial direction thereof, and a limiting sliding groove is arranged on the inner wall of the silencing shell and slidingly matched with the limiting sliding block.

[0011] As a further supplement to the present scheme, a protective cylinder is sleeved on the outer side of the silencing shell, the protective cylinder is fixed with the purification shell, and the inner diameter of the protective cylinder is greater than the outer diameter of the silencing shell.

[0012] As a further supplement to the present scheme, the end of the protective cylinder away from the purification shell is flush with the end of the silencing shell, and a protective cover covering the pipe openings of the protective cylinder and the silencing shell is elastically connected to the end of the protective cylinder away from the purification shell.

[0013] As a further supplement to the present scheme, a fixing ring is sleeved on the outer side of the protective cylinder, a limiting sliding rod is fixed on the protective cover and slidingly penetrates the fixing ring, and a stretching spring is fixed between the fixing ring and the protective cover.

[0014] In summary, the technical effects and advantages of the present application are:

[0015] 1. In this utility model, through the coordinated arrangement of the slip ring, the first sound hole, the second sound hole, and the compression spring, as the usage time increases and the amount of exhaust gas processed increases, the disc-shaped purification component becomes increasingly clogged, and its internal resistance gradually increases, causing the disc-shaped purification component to move towards one side of the muffler housing. This pushes the slip ring towards the output end of the muffler housing until the second sound hole on the slip ring coincides with the first sound hole. At this time, some of the purified exhaust gas overflows from the second sound hole and the first sound hole, without being silenced by the muffler component. The volume of the exhaust gas emission increases significantly at this time, which can effectively remind the staff to replace or clean the disc-shaped purification component.

[0016] 2. In this utility model, by installing a protective sleeve on the outside of the muffler housing, the protective sleeve can protect the muffler housing and prevent damage to the internal muffler components. The end of the protective sleeve away from the purification housing is flush with the end of the muffler housing. The end of the protective sleeve away from the purification housing is elastically connected to a protective cover that covers the opening of the protective sleeve and the muffler housing. When the forklift is idle, the protective cover can automatically cover the opening of the protective sleeve and the muffler housing, effectively preventing insects from crawling into the muffler housing and damaging the muffler components or the disc-shaped purification components when the forklift is idle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Fig. 1 This is a schematic diagram of the overall three-dimensional structure in this embodiment;

[0019] Fig. 2 This is a schematic diagram of the split structure in this embodiment;

[0020] Fig. 3 This is a schematic diagram of the cross-sectional structure in this embodiment.

[0021] In the diagram: 1. Silencing shell; 2. Purification shell; 3. Silencing component; 4. Disc-shaped purification component; 5. Slip ring; 6. Compression spring; 7. Limiting slider; 8. Limiting groove; 9. First sound hole; 10. Second sound hole; 11. Pressure ring; 12. Protrusion; 13. Protective cylinder; 14. Protective cover; 15. Fixing ring; 16. Limiting slide rod; 17. Tension spring. Detailed Implementation

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] Embodiment: Reference Figs. 1-3 The forklift silencer with tail gas purification function shown in the figure comprises a silencing shell 1 with a silencing assembly 3 and a purification shell 2 with a round pie-shaped purification assembly 4. The silencing assembly 3 and the round pie-shaped purification assembly 4 respectively adopt conventional silencing structures and purification structures in the prior art. For example, for the silencing assembly 3, a conventional sound-absorbing cotton layer and a perforated plate can be adopted. The sound-absorbing cotton layer adopts high-performance glass fiber sound-absorbing cotton, has good sound-absorbing performance and high-temperature resistance, and the perforated plate can be located outside the sound-absorbing cotton layer, is made of metal material, and has a plurality of small holes uniformly distributed on the surface. The perforated plate is used to fix the sound-absorbing cotton layer and simultaneously plays a certain buffering and dispersing role for the flow of tail gas, thereby further enhancing the silencing effect. The round pie-shaped purification assembly 4 can adopt a conventional catalytic converter and a particulate trap. The particulate trap can capture particulate matters such as soot in the tail gas. Since the above-mentioned silencing structure and purification structure both adopt existing structures, no further description is given here.

[0024] The purification shell 2 is fixed to one end of the silencing shell 1 close to the tail gas entering side, the circumferential side of the round pie-shaped purification assembly 4 is slidably attached to the inner wall of the purification shell 2, a plurality of first sound holes 9 are equidistantly arranged on the side of the silencing shell 1 close to the purification shell 2 along the circumferential side thereof, a sliding ring 5 is slidably and attached to the inner wall of the side of the silencing shell 1 close to the purification shell 2 along the axial direction thereof. Specifically, a limiting sliding block 7 is integrally arranged on the outer wall of the sliding ring 5 along the axial direction thereof, and a limiting sliding groove 8 slidably matched with the limiting sliding block 7 is arranged on the inner wall of the silencing shell 1. A plurality of second sound holes 10 are equidistantly arranged on the sliding ring 5, and in the initial state, the sliding ring 5 covers the first sound holes 9, the second sound holes 10 are located between the first sound holes 9 and the purification shell 2, and a compression ring 11 is connected to the side of the sliding ring 5 close to the round pie-shaped purification assembly 4. A compression spring 6 is fixed between the compression ring 11 and the inner wall of the side of the purification shell 2 close to the silencing shell 1.

[0025] As the internal resistance of the particle trap gradually increases during the process of capturing particulate matters, the disc-shaped purification assembly 4 moves towards one side of the muffling shell 1, thereby pushing the sliding ring 5 towards the output end of the muffling shell 1, until the second sound hole 10 on the sliding ring 5 coincides with the first sound hole 9, at which time the purified exhaust gas flows out from the second sound hole 10 and the first sound hole 9 without the muffling effect of the muffling assembly 3, and the volume of the exhaust gas emission is obviously increased, which can well prompt the staff to replace or clean the disc-shaped purification assembly 4.

[0026] In addition, in order to make the prompt more obvious, a conventional whistle structure (not shown in the figure) can be installed inside the first sound hole 9, and a specific sound can be emitted by the whistle structure when the airflow passes through, which is more effective.

[0027] The end face of the compression ring 11 away from the sliding ring 5 is fixed with a plurality of protrusions 12 at equal intervals, which can avoid that the compression ring 11 covers part of the disc-shaped purification assembly 4.

[0028] The outer side of the muffling shell 1 is sleeved with a protection cylinder 13, the protection cylinder 13 is fixed with the purification shell 2, and the inner diameter of the protection cylinder 13 is greater than the outer diameter of the muffling shell 1, so that the protection cylinder 13 can protect the muffling shell 1 and make the internal muffling assembly 3 not easy to be damaged.

[0029] In order to prevent insects from climbing into the muffling shell 1 and damaging the muffling assembly 3 or the disc-shaped purification assembly 4 when the forklift is idle, the end of the protection cylinder 13 away from the purification shell 2 is flush with the end of the muffling shell 1, and the end of the protection cylinder 13 away from the purification shell 2 is elastically connected with a protection cover 14 covering the pipe openings of the protection cylinder 13 and the muffling shell 1, specifically, the outer side of the protection cylinder 13 is sleeved with a fixing ring 15, the protection cover 14 is fixed with a limiting sliding rod 16 slidingly penetrating through the fixing ring 15, and a tension spring 17 is fixed between the fixing ring 15 and the protection cover 14.

[0030] When the forklift is idle, the protection cover 14 covers the pipe openings of the protection cylinder 13 and the muffling shell 1 under the action of the tension spring 17.

[0031] The working principle of the utility model is: the muffler is fixed with the forklift exhaust pipe, when the forklift is idle, the protection cover 14 covers the pipe openings of the protection cylinder 13 and the muffling shell 1 under the action of the tension spring 17, which effectively avoids that insects climb into the muffling shell 1 and damage the muffling assembly 3 or the disc-shaped purification assembly 4 when the forklift is idle.

[0032] When the forklift is working, the exhaust gas is first purified by the disc-shaped purification assembly 4, the purified exhaust gas enters the muffling shell 1, is discharged after being muffled by the muffling assembly 3, the protection cover 14 is opened under stress, and the exhaust gas is discharged.

[0033] With the increase of using time and the increase of the amount of processing tail gas, the clogging of the disc-shaped purification assembly 4 is more and more serious, the internal resistance thereof is gradually increased, the disc-shaped purification assembly 4 is moved towards the side of the muffling shell 1, the sliding ring 5 is pushed towards the output end of the muffling shell 1, until the second sound hole 10 on the sliding ring 5 is coincided with the first sound hole 9, at this time, the partially purified tail gas is overflowed from the second sound hole 10 and the first sound hole 9, and the tail gas is not subjected to the muffling effect of the muffling assembly 3, at this time, the volume of the tail gas emission is obviously increased, which can well prompt the staff to replace or clean the disc-shaped purification assembly 4.

[0034] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A forklift silencer with exhaust gas purification function, comprising a silencing shell (1) with a silencing assembly (3) and a purification shell (2) with a round cake-shaped purification assembly (4), characterized in that, The purification shell (2) is fixed to the muffling shell (1) near the exhaust gas entering side, and the circumferential side of the disc-shaped purification assembly (4) is slidably attached to the inner wall of the purification shell (2). The muffling shell (1) is provided with a plurality of first sound holes (9) equidistantly arranged along the circumferential side near the side of the purification shell (2), and a sliding ring (5) is slidably attached to the inner wall of the muffling shell (1) near the side of the purification shell (2) along the axial direction, and a plurality of second sound holes (10) are equidistantly arranged on the sliding ring (5), and in the initial state, the sliding ring (5) covers the first sound holes (9), and the second sound holes (10) are located between the first sound holes (9) and the purification shell (2). The sliding ring (5) is connected to a compression ring (11) near the side of the disc-shaped purification assembly (4), and a compression spring (6) is fixed between the compression ring (11) and the inner wall of the purification shell (2) near the side of the muffling shell (1).

2. The forklift silencer with exhaust purification function according to claim 1, characterized in that: A plurality of protrusions (12) are equidistantly fixed to the end face of the compression ring (11) away from the sliding ring (5).

3. The forklift silencer with exhaust purification function according to claim 1, characterized in that: A limiting sliding block (7) is integrally arranged on the outer wall of the sliding ring (5) along the axial direction, and a limiting sliding groove (8) is arranged on the inner wall of the muffling shell (1) and slidably matched with the limiting sliding block (7).

4. The forklift silencer with exhaust purification function according to claim 1, characterized in that: The muffling shell (1) is provided with a protective cylinder (13) on the outer side, and the protective cylinder (13) is fixed to the purification shell (2), and the inner diameter of the protective cylinder (13) is greater than the outer diameter of the muffling shell (1).

5. The forklift silencer with exhaust purification function according to claim 4, characterized in that: The end of the protective cylinder (13) away from the purification shell (2) is flush with the end of the muffling shell (1), and a protective cover (14) covering the pipe openings of the protective cylinder (13) and the muffling shell (1) is elastically connected to the end of the protective cylinder (13) away from the purification shell (2).

6. The forklift silencer with exhaust purification function according to claim 5, characterized in that: A fixing ring (15) is sleeved on the outer side of the protective cylinder (13), a limiting sliding rod (16) slidably penetrating through the fixing ring (15) is fixed to the protective cover (14), and a stretching spring (17) is fixed between the fixing ring (15) and the protective cover (14).

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