阅读说明：本技术 一种柴油机冷启动过滤器 (Cold start filter of diesel engine ) 是由 卢启辉 夏全 丁俊 梅峰 于 2019-12-23 设计创作，主要内容包括：一种柴油机冷启动过滤器。本发明涉及柴油机配件,尤其涉及一种柴油机冷启动过滤器。提供了一种结构紧凑,体积小,加工简便,减少燃料系统蜡或冰堆积的概率的一种柴油机冷启动过滤器。所述壳体一与壳体二之间设有腔体A；所述壳体二与壳体三之间设有腔体B；所述壳体一包括本体A、管体A和管体B；所述本体A上设有上下贯通的孔一和底部向下延伸的容纳槽；容纳槽的底部封闭,与所述执行机构相适配；所述管体A和管体B对称固定设置在所述本体A的外侧壁上,并分别与所述容纳槽连通；本发明具有结构紧凑,体积小,加工简便,减少燃料系统蜡或冰堆积的概率等特点。(A cold start filter for diesel engine. The invention relates to a diesel engine accessory, in particular to a cold start filter of a diesel engine. The cold start filter for the diesel engine has the advantages of compact structure, small volume, simple and convenient processing and capability of reducing the probability of wax or ice accumulation of a fuel system. A cavity A is arranged between the first shell and the second shell; a cavity B is arranged between the second shell and the third shell; the first shell comprises a body A, a pipe body A and a pipe body B; the body A is provided with a first hole which is communicated up and down and an accommodating groove with the bottom extending downwards; the bottom of the accommodating groove is closed and is matched with the actuating mechanism; the pipe body A and the pipe body B are symmetrically and fixedly arranged on the outer side wall of the body A and are respectively communicated with the accommodating groove; the invention has the characteristics of compact structure, small volume, simple and convenient processing, reduction of the probability of wax or ice accumulation of a fuel system and the like.)

1. A cold start filter of a diesel engine is characterized by comprising a first shell, an actuating mechanism, a second shell and a third shell;

a cavity A is arranged between the first shell and the second shell; a cavity B is arranged between the second shell and the third shell;

the first shell comprises a body A, a pipe body A and a pipe body B;

the body A is provided with a first hole which is communicated up and down and an accommodating groove with the bottom extending downwards; the bottom of the accommodating groove is closed and is matched with the actuating mechanism;

the pipe body A and the pipe body B are symmetrically and fixedly arranged on the outer side wall of the body A and are respectively communicated with the accommodating groove;

the second shell is detachably, hermetically and fixedly connected with the first shell through a connecting mechanism A;

the second shell is provided with a pump pipe connecting seat, a second hole, a third hole and an upward extending boss;

the second hole and the third hole are respectively communicated up and down and are symmetrically arranged on the second shell;

the boss is provided with a vertically through containing hole which is matched with the actuating mechanism;

the actuating mechanism comprises an actuating column, a spring and a temperature control valve;

the execution column comprises an upper column body, a middle column body and a lower column body which are fixedly connected from top to bottom in sequence;

the middle position on the middle column body is provided with an eighth hole and a ninth hole which are communicated in the horizontal direction;

a seventh hole which extends upwards and is communicated with the eighth hole is arranged on the lower column body,

a counter bore matched with the temperature control valve is arranged on the upper column body, and the temperature control valve is fixedly arranged in the counter bore;

the lower column body is positioned in the accommodating groove, and the upper column body is positioned in the accommodating hole;

the shell III is sleeved on the outer side of the shell II and is detachably and fixedly connected with the shell I through a buckle mechanism;

the pump pipe connecting seat is provided with a through hole and is fixedly connected to the top of the second shell;

a fourth hole is formed in the third shell; the inner side wall of the hole IV is provided with an oil pump sealing ring;

one end of the oil pump pipe extends into the hole IV and is fixedly connected with the through hole on the pump pipe connecting seat; the other end of the oil pump pipe is communicated with the oil pump.

2. The diesel engine cold start filter according to claim 1, wherein the connecting mechanism a comprises a plurality of connecting sleeve columns and a plurality of positioning columns;

a plurality of connecting sleeve columns are uniformly distributed and vertically fixedly connected to the bottom of the second shell;

the connecting sleeve column is provided with a positioning hole matched with the positioning column;

the positioning column is vertically and fixedly arranged on the first shell;

the number of the positioning columns is equal to that of the connecting sleeve columns, and the positioning columns correspond to the connecting sleeve columns one to one.

3. The diesel engine cold start filter according to claim 1, wherein the fastening mechanism comprises a plurality of fastening blocks and a plurality of fastening ports;

the clamping blocks are uniformly distributed and fixedly arranged on the outer side surface of the first shell in the same plane;

the plurality of bayonets are uniformly distributed on the shell III and correspondingly matched with the clamping blocks;

the section of the fixture block is triangular;

the clamping blocks are equal to the clamping openings in number and correspond to the clamping openings one by one.

4. The cold start filter for the diesel engine as set forth in claim 1, wherein a filter a is fixedly connected to the top of the second hole, and the filter a extends into the third housing.

5. The cold start filter for diesel engine as set forth in claim 1, wherein a filter B is fixedly connected to the top of said third hole, and said filter B is inserted into said third housing.

6. The cold start filter of the diesel engine as set forth in claim 1, wherein a support mechanism of the oil pump pipe is provided on the third housing near the top;

the supporting mechanism comprises a limiting clamp and a limiting clamping groove seat;

the limiting clamping groove seat is fixedly arranged on the third shell body and close to the top, and a U-shaped clamping groove matched with the oil pump pipe is formed in the limiting clamping groove;

the limiting clamp is fixedly arranged at the top of the limiting clamping groove seat and is of a U-shaped structure;

and a jack matched with the limiting clamping groove seat is arranged between the limiting clamp and the third shell.

7. The diesel engine cold start filter of claim 1, wherein the pipe body A is provided with a duckbill valve which is fixedly connected.

8. The diesel engine cold start filter of claim 1, wherein the thermo-valve is of the type FG239A wax thermo-valve.

Technical Field

The invention relates to a diesel engine accessory, in particular to a cold start filter of a diesel engine.

Background

It is well known that diesel fuel forms paraffin crystals at low temperatures near the cloud point. Furthermore, at these cold temperatures, any water in the fuel tank may form ice crystals. To prevent wax or ice clogging of fuel system components (e.g., filters) after a cold start, electric heaters are used in some prior art fuel delivery systems. Since the new diesel fuel supply system also has a higher fuel supply and return for system cooling, the prior art electric heater does not have sufficient de-waxing or de-icing effect on the increased fuel supply.

Typical temperature controlled recirculation systems for selectively diverting hot fuel to a fuel filter to de-wax or de-ice the fuel filter during cold start-up are often insufficient to de-wax or de-ice near the fuel inlet because these devices are locked out of the fuel tank. This is primarily because these devices are relatively large, which would otherwise take up too much space in the fuel tank. Further, these devices are far from the filter, and have a problem that the fuel filter cannot be sufficiently dredged.

Disclosure of Invention

Aiming at the problems, the invention provides the cold start filter of the diesel engine, which has the advantages of compact structure, small volume, simple and convenient processing and capability of reducing the probability of wax or ice accumulation of a fuel system.

The technical scheme of the invention is as follows: the device comprises a first shell, an actuating mechanism, a second shell and a third shell;

a cavity A is arranged between the first shell and the second shell; a cavity B is arranged between the second shell and the third shell;

the first shell comprises a body A, a pipe body A and a pipe body B;

the body A is provided with a first hole which is communicated up and down and an accommodating groove with the bottom extending downwards; the bottom of the accommodating groove is closed and is matched with the actuating mechanism;

the pipe body A and the pipe body B are symmetrically and fixedly arranged on the outer side wall of the body A and are respectively communicated with the accommodating groove;

the second shell is detachably, hermetically and fixedly connected with the first shell through a connecting mechanism A;

the second shell is provided with a pump pipe connecting seat, a second hole, a third hole and an upward extending boss;

the second hole and the third hole are respectively communicated up and down and are symmetrically arranged on the second shell;

the boss is provided with a vertically through containing hole which is matched with the actuating mechanism;

the actuating mechanism comprises an actuating column, a spring and a temperature control valve;

the execution column comprises an upper column body, a middle column body and a lower column body which are fixedly connected from top to bottom in sequence;

the middle position on the middle column body is provided with an eighth hole and a ninth hole which are communicated in the horizontal direction;

a seventh hole which extends upwards and is communicated with the eighth hole is arranged on the lower column body,

a counter bore matched with the temperature control valve is arranged on the upper column body, and the temperature control valve is fixedly arranged in the counter bore;

the lower column body is positioned in the accommodating groove, and the upper column body is positioned in the accommodating hole;

the shell III is sleeved on the outer side of the shell II and is detachably and fixedly connected with the shell I through a buckle mechanism;

the pump pipe connecting seat is provided with a through hole and is fixedly connected to the top of the second shell;

a fourth hole is formed in the third shell; the inner side wall of the hole IV is provided with an oil pump sealing ring;

one end of the oil pump pipe extends into the hole IV and is fixedly connected with the through hole on the pump pipe connecting seat; the other end of the oil pump pipe is communicated with the oil pump.

The connecting mechanism A comprises a plurality of connecting sleeve columns and a plurality of positioning columns;

a plurality of connecting sleeve columns are uniformly distributed and vertically fixedly connected to the bottom of the second shell;

the connecting sleeve column is provided with a positioning hole matched with the positioning column;

the positioning column is vertically and fixedly arranged on the first shell;

the number of the positioning columns is equal to that of the connecting sleeve columns, and the positioning columns correspond to the connecting sleeve columns one to one.

The clamping mechanism comprises a plurality of clamping blocks and a plurality of clamping ports;

the clamping blocks are uniformly distributed and fixedly arranged on the outer side surface of the first shell in the same plane;

the plurality of bayonets are uniformly distributed on the shell III and correspondingly matched with the clamping blocks;

the section of the fixture block is triangular;

the clamping blocks are equal to the clamping openings in number and correspond to the clamping openings one by one.

And the top of the second hole is provided with a fixedly connected filter A, and the filter A extends into the third shell.

And a filter B fixedly connected with the top of the third hole is arranged, and the filter B extends into the third shell.

A supporting mechanism of an oil pump pipe is arranged on the third shell close to the top;

the supporting mechanism comprises a limiting clamp and a limiting clamping groove seat;

the limiting clamping groove seat is fixedly arranged on the third shell body and close to the top, and a U-shaped clamping groove matched with the oil pump pipe is formed in the limiting clamping groove;

the limiting clamp is fixedly arranged at the top of the limiting clamping groove seat and is of a U-shaped structure;

and a jack matched with the limiting clamping groove seat is arranged between the limiting clamp and the third shell.

And a duckbill valve fixedly connected is arranged on the pipe body A.

The model of the temperature control valve is FG239A wax type temperature control valve.

The invention comprises a first shell, an actuating mechanism, a second shell and a third shell; the actuating mechanism comprises an actuating column, a spring and a temperature control valve. When the engine is cold started: the oil in the oil tank is in a low-temperature state, at the moment, the oil is sucked into a cavity A of a first shell from the oil tank through a filter screen at the bottom of the first shell, the oil in the cavity A enters a cavity B from a hole three and a hole two, the oil in the cavity B enters an oil pump pipe from the bottom of a pump pipe connecting seat, passes through the oil pump pipe and enters a fuel system, the oil in the fuel system enters a pipe body B, at the moment, the temperature control valve is in a state shown in figure 20, the execution mechanism is in a state shown in figure 10, and at the moment, the duckbill; hot oil flowing out of the eight holes and the nine holes on the execution column enters the cavity A and then enters the cavity B from the cavity A, and the process is circulated. The present invention provides a novel in-tank diesel recirculation manifold for recirculating hot diesel from an engine through a fuel delivery system to reduce low temperature plugging of the fuel delivery system. A fuel filter is disposed within the housing between the fuel supply inlet and the fuel supply outlet. After a cold start, a hot return fuel is selectively provided to clear a blockage (de-waxing or de-icing) of a fuel system component (e.g., a fuel filter). Once clogging is no longer an issue, hot fuel enters the tank directly. The invention has the characteristics of compact structure, small volume, simple and convenient processing, reduction of the probability of wax or ice accumulation of a fuel system and the like.

Drawings

Figure 1 is a schematic view of the structure of the present invention,

figure 2 is a schematic diagram of the split state of figure 1,

FIG. 3 is a schematic perspective view of the assembly of FIG. 1 in a direction of view (with the spring and thermostatic valve hidden for clarity),

figure 4 is a schematic view of the disassembled three-dimensional structure in the two directions of the view angle of figure 3,

figure 5 is a schematic view of a bottom structure of the housing of figure 3,

figure 6 is a schematic view of the structure a-a of figure 5,

FIG. 7 is a perspective view of the actuator and the first housing in a cold start state,

figure 8 is a schematic plan view of the structure of figure 7,

figure 9 is a schematic bottom view of the structure of figure 8,

figure 10 is a schematic view of B-B of figure 9 (the direction of the arrows being the direction of flow of the hot oil in the fuel system into the body B),

figure 11 is a schematic perspective view of a first housing,

figure 12 is a schematic perspective view of the second housing,

figure 13 is a schematic perspective view of a second housing,

figure 14 is a schematic perspective view of a second housing,

FIG. 15 is a schematic perspective view of the first and second housings in a disassembled state,

FIG. 16 is a perspective view of the first and second housings,

figure 17 is a schematic perspective view of an actuator column,

figure 18 is a schematic plan view of an actuator column,

figure 19 is a three-dimensional structure diagram of the third and second shells in a split state,

FIG. 20 is a schematic view showing the construction of a thermo-valve in a low temperature state,

FIG. 21 is a schematic view showing the construction of a thermo-valve in a high temperature state,

FIG. 22 is a flow chart of the operation of the present invention (the direction of the arrows in the figure, the flow direction);

in the figure, 1 is a first shell, 11 is a body A, 111 is a first hole, 112 is a receiving groove, 12 is a tube body A, 13 is a tube body B, 2 is an actuating mechanism, 21 is an actuating column, 211 is an eighth hole, 212 is a ninth hole, 213 is a seventh hole, 3 is a spring, 4 is a temperature control valve, 5 is a second shell, 51 is a pump tube connecting seat, 52 is a second hole, 53 is a third hole, 54 is a boss, 55 is a connecting sleeve column, 6 is a third shell, 61 is a fourth hole, 62 is a bayonet, 7 is a supporting mechanism, 71 is a limiting clamp, 72 is a limiting clamp seat, and 8 is a duckbill valve.

Detailed Description

The invention is shown in figures 1-22 and comprises a first shell 1, an actuating mechanism 2, a second shell 5 and a third shell 6;

a cavity A is arranged between the first shell 1 and the second shell 5; a cavity B is arranged between the second shell 5 and the third shell 6;

the first shell 1 comprises a body A11, a tube A12 and a tube B13;

the body A11 is provided with a first through hole 111 and a containing groove 112 with the bottom extending downwards; the bottom of the accommodating groove 112 is closed and is matched with the actuating mechanism 2; the top surface of the accommodating groove 112 and the top surface of the first shell 1 are in the same plane;

the tube body A12 and the tube body B13 are symmetrically and fixedly arranged on the outer side wall of the body A11 and are respectively communicated with the accommodating groove 112; the tube body A12 and the tube body B13 are respectively integrally formed with the body A11;

a fifth hole is formed in the pipe body A12, a sixth hole is formed in the pipe body B13, and the fifth hole and the sixth hole are respectively communicated with the accommodating groove 112;

the second shell 5 is detachably, hermetically and fixedly connected with the first shell 1 through a connecting mechanism A; the first shell 1 and the second shell 5 are sealed through an O-shaped sealing ring;

the second shell 5 is provided with a pump pipe connecting seat 51, a second hole 52, a third hole 53 and a boss 54 extending upwards;

the second hole 52 and the third hole 53 are respectively communicated up and down and are symmetrically arranged on the second shell 5;

the boss 54 is provided with a vertically through accommodating hole which is matched with the actuating mechanism 2;

the actuating mechanism 2 comprises an actuating column 21, a spring 3 and a temperature control valve 4;

the actuating column 21 comprises an upper column body, a middle column body and a lower column body which are fixedly connected from top to bottom in sequence;

the middle position on the middle column body is provided with an eighth hole 211 and a ninth hole 212 which are communicated in the horizontal direction;

the lower column body is provided with a seventh hole 213 which extends upwards and is communicated with the eighth hole 211,

a counter bore matched with the temperature control valve 4 is formed in the upper column body, and the temperature control valve 4 is fixedly arranged in the counter bore;

the lower column is located in the accommodating groove 112, and the upper column is located in the accommodating hole;

the third shell 6 is sleeved on the outer side of the second shell 5 and is detachably and fixedly connected with the first shell 1 through a buckle mechanism;

the pump pipe connecting seat 51 is provided with a through hole and is fixedly connected to the top of the second shell 5;

a fourth hole 61 is formed in the third shell 6; the inner side wall of the hole IV 61 is provided with an oil pump sealing ring;

one end of the oil pump pipe extends into the hole IV 61 and is fixedly connected with the through hole on the pump pipe connecting seat 51; the other end of the oil pump pipe is communicated with the oil pump.

When the engine is cold started: the oil in the oil tank is in a low-temperature state, at the moment, the oil is sucked into a cavity A of a shell I1 from the oil tank through a filter screen at the bottom of the shell I1, the oil in the cavity A enters a cavity B from a hole III 53 and a hole II 52, the oil in the cavity B enters an oil pump pipe from the bottom of a pump pipe connecting seat 51, passes through the oil pump pipe and enters a fuel system, the oil in the fuel system enters a pipe body B13, at the moment, the temperature control valve 4 is in a state shown in figure 20, the execution mechanism 2 is in a state shown in figure 10, and at the moment, a duckbill valve 8 on a pipe body A12 is in a closed state (; the hot oil flowing out of the eight holes 211 and the nine holes 212 on the actuating column 21 enters the cavity A and then enters the cavity B from the cavity A, and the process is circulated.

After the operation for a period of time, the temperature in the oil tank rises, at this time, the top rod of the wax temperature control valve 4 pushes the execution column 21 downwards (as shown in fig. 6 and 21), at this time, the oil in the hole six cannot enter the cavity a, the oil in the hole six passes through the lower part of the execution column 21, and the duckbill valve 8 is pressed to open in the hole five. At this time, oil is sucked into the cavity A from the first hole 111 through the filter screen, then enters the cavity B through the second hole 52 and the third hole 53, enters the fuel system from the oil pump through the oil pump pipe, and returns to the oil in the cavity A and then flows out of the duckbill valve 8 and returns to the oil tank.

The connecting mechanism A comprises a plurality of connecting sleeve columns 55 and a plurality of positioning columns; the positioning post is inserted into the connecting sleeve post 55 and is tightly matched with the connecting sleeve post;

a plurality of connecting sleeve columns 55 are uniformly distributed and vertically fixedly connected to the bottom of the second shell 5;

the connecting sleeve column 55 is provided with a positioning hole matched with the positioning column;

the positioning column is vertically and fixedly arranged on the first shell 1;

the number of the positioning columns is equal to that of the connecting sleeve columns 55, and the positioning columns correspond to the connecting sleeve columns one to one.

The clamping mechanism comprises a plurality of clamping blocks and a plurality of clamping openings 62;

the clamping blocks are uniformly distributed and fixedly arranged on the outer side surface of the shell 1 in the same plane;

the bayonets 62 are uniformly distributed on the shell III 6 and correspondingly matched with the fixture blocks;

the section of the fixture block is triangular;

the clamping blocks are equal to the clamping openings 62 in number and correspond to the clamping openings 62 one by one.

When the third shell 6 is detached from the second shell 5, the bayonet 62 is separated from the fixture block through elastic deformation of the third shell 6 at a position close to the bottom, so that the third shell 6 is separated from the second shell 5.

The top of the second hole 52 is provided with a fixedly connected filter A, and the filter A extends into the third shell 6. The filter a and the filter B are each cylindrical.

And a fixedly connected filter B is arranged at the top of the third hole 53 and extends into the third shell 6. The oil entering the cavity B is filtered through the filter A and the filter B, and the service life and the operation stability of the pump are improved. The filter a and the filter B are commercially available parts, and are omitted in the drawings for clarity of the structures of other parts. The bottom of the filter A is sleeved on the outer side wall of the hole II, the bottom of the filter B is sleeved on the outer side wall of the hole III, and finally the filter A is limited in the cavity B through the shell III.

A supporting mechanism 7 of an oil pump pipe is arranged on the shell III 6 and is close to the top;

the supporting mechanism 7 comprises a limiting clamp 71 and a limiting clamp groove seat 72;

the limiting clamping groove seat 72 is fixedly arranged on the third shell 6 close to the top, and a U-shaped clamping groove matched with the oil pump pipe is formed in the limiting clamping groove;

the limiting clamp 71 is fixedly arranged at the top of the limiting clamp groove seat 72 and is of a U-shaped structure;

and a jack matched with the limiting clamping groove seat 72 is arranged between the limiting clamping hoop 71 and the third shell 6.

The oil pump pipe firstly passes through the jack of the limiting clamp 71 and enters the shell III 6 from the hole IV 61 through the limiting clamp groove seat 72.

And a duckbill valve 8 fixedly connected with the pipe body A12 is arranged on the pipe body A12. The duckbill valve 8 is of the type: FG239A nipple.

At low temperature, the duckbill valve 8 is closed (only a small amount of oil flows out, facilitating air exhaust), and at high temperature, it is open.

The temperature control valve 4 is a wax type temperature control valve with the model number being FG 239A.