CN215927619U - Fork truck intake pipe and diesel fork truck - Google Patents
Fork truck intake pipe and diesel fork truck Download PDFInfo
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- CN215927619U CN215927619U CN202121997578.0U CN202121997578U CN215927619U CN 215927619 U CN215927619 U CN 215927619U CN 202121997578 U CN202121997578 U CN 202121997578U CN 215927619 U CN215927619 U CN 215927619U
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- pipe
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Abstract
The utility model relates to a diesel fork lift truck, in order to solve the drainage problem of the air inlet pipe formed by a top protection frame upright post of the existing diesel fork lift truck, the utility model constructs a fork lift truck air inlet pipe and a diesel fork lift truck, wherein the fork lift truck air inlet pipe comprises a vertical pipe body, the lower end of the pipe body is closed, the upper part of the pipe body is provided with an air inlet, the lower part of the pipe body is provided with an air outlet joint used for being connected with an air inlet rubber pipe, and the closed part of the lower end of the pipe body is provided with a one-way drain valve; the inlet of the one-way drain valve is communicated with the inner cavity of the pipe body, the outlet is communicated with the outside, the outlet is positioned below the inlet, the one-way drain valve is opened when the pressure on the inlet side is greater than or equal to the pressure on the outlet side, and the one-way drain valve is closed when the pressure on the inlet side is less than the pressure on the outlet side. In the utility model, the one-way drain valve is opened to drain water under the action of gravity, and is closed under the action of external pressure when the air inlet pipe is used for air inlet, so that unclean air at the lower end of the air inlet pipe enters the air inlet pipe and the performance of an air filter and an engine is not affected.
Description
Technical Field
The utility model relates to a diesel fork lift truck, in particular to a fork lift truck air inlet pipe and a diesel fork lift truck.
Background
The diesel fork lift truck usually takes a stand column on one side of the rear part of the overhead guard as an engine air inlet pipeline, an air inlet is arranged at the upper end of the stand column of the overhead guard, the lower part of the stand column of the overhead guard is connected with an air filter through an air inlet rubber pipe, an air inlet grille is arranged at the air inlet, high-level clean air enters the stand column from the air inlet grille, then enters the air filter through the air inlet rubber pipe, and enters an engine after filtration.
In rainy days or car washing, water enters the air inlet from the air inlet grille on the upright post and is stored in the air channel of the upright post, the water enters the engine when the engine is started, and the engine is damaged, for this reason, a water outlet 11 is formed at the lower end of the upright post, and the water entering the upright post is discharged through the water outlet as shown in fig. 1.
The water outlet is arranged at the bottom of the upright post, so that a new problem is caused, and because the water outlet is positioned at a low position and in an engine compartment, raised dust on the ground and high-temperature air in the engine compartment can enter an air inlet system from the water outlet, so that the performance of an air filter and the performance of an engine are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of water drainage of an air inlet pipe formed by an overhead guard stand column of the existing diesel fork lift truck, and provides a forklift air inlet pipe and a diesel fork lift truck.
The technical scheme for realizing the purpose of the utility model is as follows: the air inlet pipe of the forklift comprises a vertical pipe body, wherein the lower end of the pipe body is closed, the upper part of the pipe body is provided with an air inlet, the lower part of the pipe body is provided with an air outlet joint for connecting an air inlet rubber pipe, and the air inlet pipe is characterized in that a one-way drain valve is arranged at the closed part of the lower end of the pipe body; the inlet of the one-way drain valve is communicated with the inner cavity of the pipe body, the outlet is communicated with the outside, the outlet is positioned below the inlet, the one-way drain valve is opened when the pressure on the inlet side is greater than or equal to the pressure on the outlet side, and the one-way drain valve is closed when the pressure on the inlet side is less than the pressure on the outlet side. In the utility model, after water enters the pipe body, the pressure at the inlet side of the one-way drain valve is more than or equal to the pressure at the outlet side due to the gravity action of the water, so that the one-way drain valve is opened to drain water. When the air inlet pipe is used for air inlet, the interior of the pipe body is in a negative pressure state relative to the outside, the pressure of the inlet side is smaller than the pressure of the outlet side, and the one-way drain valve is closed, so that the problem that unclean air at the lower end of the air inlet pipe enters the air inlet pipe to influence the performance of an air filter and an engine is solved.
In the above-mentioned fork truck intake pipe, the one-way drain valve mainly comprises tubulose disk seat and tubulose valve, the upper end fixed mounting of tubulose disk seat on the bottom shrouding of body lower extreme and with body inner chamber intercommunication, the tubulose valve is made by flexible material, its upper end with tubulose disk seat lower extreme overlaps fixed connection mutually, and the lower extreme is the platykurtic under natural state and is closed. This kind of one-way drain valve, the tubular valve is formed by the preparation of elastic rubber, and the lower extreme is flat, is the duckbilled form, if intake in the intake pipe, ponding struts under the effect of gravity tubular valve lower extreme and flow, ponding get rid of the back, the tubular valve lower extreme resumes to the platykurtic and is closed under self elasticity effect, is in the negative pressure state for the outside in the body when the intake pipe admits air, the tubular valve lower extreme is closed more strictly under the effect of outside atmospheric pressure, avoids the intake pipe lower extreme to inhale the dirty air of low level through one-way drain valve.
In the above-mentioned fork truck intake pipe, the structure of one-way drain valve can also be: the valve seat is fixedly arranged on a bottom sealing plate at the lower end of the pipe body, and a conical cavity with a small upper part and a large lower part is arranged on the valve seat; the upper end of the conical cavity is communicated with the inner cavity of the tube body, the lower end of the conical cavity is communicated with the outside atmosphere, a light sealing ball which can be in sealing fit with the wall surface of the conical cavity is arranged in the conical cavity, and a gap is formed between the light sealing ball and the wall surface of the conical cavity in a natural state. When the air inlet pipe does not suck air, the internal pressure and the external pressure of the air inlet pipe are the same, the light sealing ball is not matched with the wall surface of the tapered cavity and is sealed under the action of gravity, and water entering the air inlet pipe is discharged through a gap between the light sealing ball and the wall surface of the tapered cavity. When the air inlet pipe inhales air (after the forklift engine is started), negative pressure is formed in the air inlet pipe, the light sealing ball moves upwards under the action of air flow to be matched with the wall surface of the conical cavity to seal, and the light sealing ball keeps sealed and closed under the action of external air pressure.
In the above-mentioned fork truck intake pipe, the structure of one-way drain valve can also be: the one-way drain valve comprises a valve seat fixedly mounted on a bottom sealing plate at the lower end of the pipe body, a water outlet hole communicated with the inner cavity of the pipe body is formed in the lower end face of the valve seat, and a valve elastically attached to the lower end face of the valve seat to seal the water outlet hole is mounted on the valve seat. Furthermore, the lower end surface of the valve seat is wedge-shaped, and the fixed connection point of the valve and the valve seat is positioned above the highest position of the lower end surface of the valve seat.
The technical scheme for realizing the purpose of the utility model is as follows: the internal combustion forklift is characterized by comprising the forklift air inlet pipeline, and the pipe body is formed by a rear upright post of an overhead guard of the internal combustion forklift.
Compared with the prior art, the forklift air inlet pipe not only solves the problem of water inlet and water outlet in the pipe body, but also avoids the influence of low-level unclean air sucked by the air inlet pipe on the performance of an air filter and an engine.
Drawings
Fig. 1 is a schematic view of an intake duct structure of a conventional diesel fork lift truck.
Fig. 2 is a schematic view of an intake structure of the diesel fork lift truck of the present invention.
Fig. 3 is a schematic view of an intake pipe structure according to the present invention.
Fig. 4 is a partially enlarged view of the bottom structure of the intake duct in the present invention.
Fig. 5 is a schematic view of a second structure of the bottom of the air inlet pipe in the present invention.
Fig. 6 is a schematic view of a third structure of the bottom of the air inlet pipe in the present invention.
Part names and serial numbers in the figure:
the device comprises a pipe body 1, a water outlet 11, an air outlet joint 13, a bottom sealing plate 13, a top protection frame upright post 2, a grille 21, an air inlet rubber pipe 3, an air filter 4, a one-way drain valve 5, a valve seat 51, a tubular valve 52, a clamp 53, a screw 54, a sheet-shaped invention 55 and a light sealing ball.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
The first embodiment.
As shown in fig. 3, the air inlet pipe of the forklift in the embodiment includes a vertical pipe body 1, the upper end and the lower end of the pipe body 1 are sealed, the upper portion is provided with an air inlet, the lower portion is provided with an air outlet joint 12 for connecting with an air inlet rubber pipe 3, and the sealed position of the lower end of the pipe body 1 is provided with a one-way drain valve 5.
As shown in fig. 4, the one-way drain valve 5 mainly comprises a valve seat 51 and a tubular valve 52, wherein the valve seat 51 is tubular, the upper end of the valve seat 51 is fixedly mounted on the bottom closing plate 13 at the lower end of the pipe body 1 and is communicated with the inner cavity of the pipe body, the tubular valve 52 is made of flexible material such as rubber material, the upper end of the valve seat is sleeved with the lower end of the valve seat 51 and is fixedly connected with the lower end of the valve seat through a clamp 53, and the lower end of the valve seat is flat and closed under the natural state.
The air intake system of the diesel fork lift truck in the embodiment is shown in fig. 2, and comprises the fork lift truck air intake pipe, wherein the pipe body is composed of a top protection frame rear upright post 2 of the fork lift truck, a grille 21 is installed at the position of an air inlet, an air outlet joint 13 at the lower part is connected with an air filter 4 through an air inlet rubber pipe 3, and an air outlet of the air filter 4 is connected with an engine through an air pipe.
In this embodiment, tubular valve 52 is made by elastic rubber, and the lower extreme is flat, is duckbilled, if intake in the body of intake pipe, ponding struts tubular valve 52 lower extreme and flows out under the effect of gravity. After accumulated water is discharged, the lower end of the tubular valve 52 is restored to be flat and closed under the action of the elasticity of the tubular valve, when the engine works, the air inlet pipe is used for air inlet, the interior of the pipe body 1 is in a negative pressure state relative to the outside, the lower end of the tubular valve 52 is closed more tightly under the action of external air pressure, and external air can only enter the pipe body 1 from the air inlet at the upper part of the top protection frame, so that high-position air inlet is realized, and low-position dirty air is prevented from being sucked into the lower end of the air inlet pipe through the one-way drain valve.
Example two.
Compared with the first embodiment, the difference of the forklift air inlet pipe in the present embodiment is the one-way drain valve. As shown in fig. 5, the one-way drain valve 5 includes a valve seat 51 fixedly mounted on the bottom closing plate of the lower end of the pipe body, and a tapered cavity with a small top and a large bottom is formed in the valve seat 51. The upper end of the conical cavity is communicated with the inner cavity of the tube body, the lower end of the conical cavity is communicated with the outside atmosphere, a light sealing ball 56 which can be in sealing fit with the wall surface of the conical cavity is arranged in the conical cavity, and a gap is formed between the light sealing ball 56 and the wall surface of the conical cavity in a natural state. When the air inlet pipe does not suck air, the internal pressure and the external pressure of the air inlet pipe are the same, the light sealing ball 56 is not matched with the wall surface of the conical cavity to be sealed under the action of gravity, and water entering the pipe body of the air inlet pipe is discharged through a gap between the light sealing ball 56 and the wall surface of the conical cavity. When the air inlet pipe inhales air (after the forklift engine is started), negative pressure exists in the air inlet pipe body, the light sealing ball 56 moves upwards under the action of air flow to be matched with the wall surface of the conical cavity to seal, and the sealing is kept closed under the action of external air pressure. The light weight sealing ball 56 may be a plastic ball or a hollow metal ball.
Example three.
Compared with the first embodiment, the difference of the forklift air inlet pipe in the present embodiment is the one-way drain valve. As shown in fig. 6, the one-way drain valve includes a valve seat 51 fixedly mounted on a sealing plate at the lower end of the pipe body, a water outlet hole communicated with the inner cavity of the pipe body is arranged on the lower end surface of the valve seat 51, and a flap valve 55 elastically attached to the lower end surface of the valve seat to seal the water outlet hole is mounted on the valve seat. The lower end surface of the valve seat 51 is wedge-shaped, and the fixed connection point of the sheet valve 55 and the valve seat 51 is positioned above the highest position of the lower end surface of the valve seat. The mounting portion of the flapper valve 55 is fixedly connected to the valve seat by a screw 54, and the portion of the flapper valve 55 attached to the lower end face of the valve seat is elastically connected to the mounting portion of the flapper valve. In a natural state, the part of the flap valve 55 attached to the lower end face of the valve seat is matched with the lower end face of the valve seat, and after water enters the air inlet pipe, the part of the flap valve attached to the lower end face of the valve seat is spread under the action of the gravity of the water, so that the water in the air inlet pipe is discharged. When the engine works and air is sucked in the air inlet pipe, negative pressure is formed in the pipe body of the air inlet pipe relative to the outside, the part, attached to the end face of the lower end of the valve seat, of the flap valve is attached to the end face of the lower end of the valve seat under the action of external pressure and self elasticity, the water outlet hole is sealed, and the condition that the lower end of the air inlet pipe sucks low-level dirty air through the one-way water discharge valve is avoided.
Claims (6)
1. A forklift air inlet pipe comprises a vertical pipe body, wherein the lower end of the pipe body is closed, an air inlet is formed in the upper part of the pipe body, an air outlet joint used for being connected with an air inlet rubber pipe is formed in the lower part of the pipe body, and the forklift air inlet pipe is characterized in that a one-way drain valve is arranged at the closed position of the lower end of the pipe body; the inlet of the one-way drain valve is communicated with the inner cavity of the pipe body, the outlet is communicated with the outside, the outlet is positioned below the inlet, the one-way drain valve is opened when the pressure on the inlet side is greater than or equal to the pressure on the outlet side, and the one-way drain valve is closed when the pressure on the inlet side is less than the pressure on the outlet side.
2. The air inlet pipe for the forklift according to claim 1, wherein the one-way drain valve is mainly composed of a tubular valve seat and a tubular valve, the upper end of the tubular valve seat is fixedly mounted on a bottom sealing plate at the lower end of the pipe body and is communicated with the inner cavity of the pipe body, the tubular valve is made of flexible materials, the upper end of the tubular valve seat is fixedly connected with the lower end of the tubular valve seat in a sleeved mode, and the lower end of the tubular valve seat is closed in a flat mode in a natural state.
3. The air inlet pipe of the forklift as recited in claim 1, wherein the one-way drain valve comprises a valve seat fixedly mounted on a bottom sealing plate at the lower end of the pipe body, and a tapered cavity with a small upper part and a large lower part is arranged on the valve seat; the upper end of the conical cavity is communicated with the inner cavity of the tube body, the lower end of the conical cavity is communicated with the outside atmosphere, a light sealing ball which can be in sealing fit with the wall surface of the conical cavity is arranged in the conical cavity, and a gap is formed between the light sealing ball and the wall surface of the conical cavity in a natural state.
4. The air inlet pipe of the forklift according to claim 1, wherein the one-way drain valve comprises a valve seat fixedly mounted on a bottom sealing plate at the lower end of the pipe body, a water outlet hole communicated with the inner cavity of the pipe body is formed in the lower end face of the valve seat, and a valve elastically attached to the lower end face of the valve seat to seal the water outlet hole is mounted on the valve seat.
5. The intake duct of forklift according to claim 4, wherein the lower end surface of said valve seat is wedge-shaped, and the fixed connection point of said valve to said valve seat is located at a position above the highest position of the lower end surface of said valve seat.
6. A diesel lift truck characterized by having the truck air intake duct of any one of claims 1 to 5, the pipe body being constituted by a rear pillar of a roof guard of the diesel lift truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121997578.0U CN215927619U (en) | 2021-08-24 | 2021-08-24 | Fork truck intake pipe and diesel fork truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121997578.0U CN215927619U (en) | 2021-08-24 | 2021-08-24 | Fork truck intake pipe and diesel fork truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215927619U true CN215927619U (en) | 2022-03-01 |
Family
ID=80420208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121997578.0U Active CN215927619U (en) | 2021-08-24 | 2021-08-24 | Fork truck intake pipe and diesel fork truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215927619U (en) |
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2021
- 2021-08-24 CN CN202121997578.0U patent/CN215927619U/en active Active
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