CN107461538B

CN107461538B - Cooling water bypass valve of diesel engine

Info

Publication number: CN107461538B
Application number: CN201610391775.5A
Authority: CN
Inventors: 张汉涛
Original assignee: SHANGHAI SHENJI METER Co Ltd
Current assignee: SHANGHAI SHENJI METER Co Ltd
Priority date: 2016-06-06
Filing date: 2016-06-06
Publication date: 2020-02-25
Anticipated expiration: 2036-06-06
Also published as: CN107461538A

Abstract

The invention discloses a cooling water bypass valve of a diesel engine, which comprises a housing, a valve body, a shaft, a piston, a spring, a bushing and a valve core, wherein the top of the housing is provided with the valve body, the top and the bottom of the valve body are provided with openings, the interior of the valve body is provided with a cavity, the cavity is in an I shape and is divided into an upper cavity, a cavity neck and a lower cavity, the center of the cavity is provided with the shaft, the bottom end of the shaft is provided with the piston in a matching manner, an air cavity is formed between the lower end surface of the piston and the top end surface of the housing, a control pressure air inlet for introducing external control pressure into the air cavity is arranged in the housing, the spring is arranged between the piston and the top end surface of the lower cavity, the middle part of the shaft is provided with the bushing in a surrounding manner, the top. The bypass valve of the invention adopts a self-operated discharge balancing device, uses a new spring reset process, and can realize correct and automatic control of cooling water by setting a device for adjusting discharge parameters.

Description

Cooling water bypass valve of diesel engine

Technical Field

The invention relates to the field of diesel engine equipment, in particular to a cooling water bypass valve of a diesel engine.

Background

The pressure reducing valve, the control valve and the steam trap are usually provided with bypass pipes, and the valves arranged on the bypass pipes are called bypass valves and are used for filling water to balance the water pressure in front of and behind the water inlet valve.

At present, most of diesel engine cooling water is discharged by manual operation, or a pipeline needing to be discharged is installed, manual discharge is adopted, pressure is controlled manually, incorrect pressure control and large fluctuation are easily caused, and the manual discharge control has the defects of high cost, complicated pipelines, easiness in leakage, poor operability and incapability of enabling a main engine to work stably.

Disclosure of Invention

Therefore, in order to solve the above problems, there is a need for a bypass valve for cooling water of a diesel engine, which employs a self-operated discharge balancing device, uses a new spring return process, and sets a device for adjusting discharge parameters, thereby realizing accurate and automatic control of cooling water, saving manpower, and improving efficiency.

The technical scheme of the invention is as follows: a cooling water bypass valve of a diesel engine comprises a housing, a valve body, a shaft, a piston, a spring, a bushing and a valve core, wherein the valve body is arranged at the top of the housing, openings are formed in the top and the bottom of the valve body, a cavity is arranged in the valve body, the cavity is I-shaped and is divided into an upper cavity, a cavity neck and a lower cavity, the shaft is arranged at the center of the cavity, the piston is arranged at the bottom end of the shaft in a matching mode, an air cavity is formed between the lower end face of the piston and the top end face of the housing, a control pressure air inlet for introducing external control pressure into the air cavity is arranged in the housing, the spring is arranged between the piston and the top end face of the lower cavity, the bushing is arranged in the middle of the shaft in a surrounding mode, the top end of the bushing is erected on the bottom end face of the upper cavity, the valve core is arranged at the top, the valve core can contact with the opening at the top end of the valve body to form a seal.

The bypass valve of the invention adopts a self-operated discharge balancing device, uses a new spring reset process, and realizes correct and automatic control of cooling water by setting a device for adjusting discharge parameters.

Preferably, the housing center still wear to be equipped with adjusting screw, adjusting screw's bottom has set gradually first gasket, first hexagon nut and lid shape nut, the axle adjusting screw with the axle center setting of lid shape nut. The size that changes the air cavity through the rotation adjusting screw sets up different emission parameters, adjust and control its height in the air cavity that forms between the lower terminal surface of piston and the top face of housing promptly through the rotation adjusting screw, and then contact with the bottom of axle, both interact, promote epaxial up-and-down motion, and then drive the piston up-and-down motion that agrees with the setting with the bottom of axle, finally realized the regulation and control to the air cavity size, through with the axle, adjusting screw and cap nut set up with the axle center, the power that the axle bottom was used to the adjusting screw is more even stable, make the adjusting screw drive axle up-and-down motion process more steady.

Preferably, the cover shell and the valve body are fixedly connected through M10X35 hexagonal screws. The stability and the sealing degree of the connection between the housing and the valve body are strengthened.

Preferably, a first O-shaped ring is arranged between the housing and the valve body, a second O-shaped ring is arranged between the spring and the shaft, a third O-shaped ring is arranged between the spring and the valve body, a fourth O-shaped ring is arranged between the bushing and the shaft, and a fifth O-shaped ring is arranged between the bushing and the valve body. Through setting up O type circle, strengthen the sealing performance in the bypass valve, increase the reliability and the life of device.

Preferably, the valve core is fixed to the top end of the shaft through a second gasket and a second hexagon nut, and the piston is fixed to the bottom end of the shaft through a third hexagon nut. And the connection stability is enhanced by nuts on the basis of fitting installation.

The invention has the beneficial effects that:

(1) the bypass valve adopts a self-operated discharge balancing device, adopts a new spring reset process, and can realize correct and correct automatic control of cooling water by setting a device for adjusting discharge parameters, thereby saving manpower and improving efficiency;

(2) the defects that the main machine cannot work stably due to the fact that manual control is adopted to discharge and install a plurality of pipelines, leakage is easy to occur, operability is poor, and discharge is incorrect are overcome.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a front view of an embodiment of the present invention;

fig. 3 is a schematic sectional view taken along line a-a in fig. 2.

Reference numerals: 1-housing, 2-control pressure inlet, 3-adjusting screw, 4-first gasket, 5-first hexagon nut, 6-cap nut, 7-M10X35 hexagon screw, 8-valve body, 9-first O-ring, 10-shaft, 11-piston, 12-second O-ring, 13-third O-ring, 14-spring, 15-bushing, 16-fourth O-ring, 17-fifth O-ring, 18-valve core, 19-second gasket, 20-second hexagon nut, 21-third hexagon nut.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1, 2 and 3, a cooling water bypass valve for a diesel engine comprises a housing 1, a valve body 8, a shaft 10, a piston 11, a spring 14, a bushing 15 and a valve core 18, wherein the valve body 8 is arranged at the top of the housing 1, openings are arranged at the top and the bottom of the valve body 8, a cavity is arranged inside the valve body 8, the cavity is in an i shape and is divided into an upper cavity, a cavity neck and a lower cavity, the shaft 10 is arranged at the center of the cavity, the piston 11 is arranged at the bottom end of the shaft 10 in a matching manner, an air cavity is formed between the lower end surface of the piston 11 and the top end surface of the housing 1, a control pressure inlet 2 for introducing external control pressure into the air cavity is arranged in the housing 1, the spring 14 is arranged between the piston 11 and the top end surface of the lower cavity, the bushing 15 is arranged around the middle of the shaft 10, the top end of the bushing 15 is erected on, the top end of the shaft 10 is provided with a valve core 18 in a matching way, and when the valve core 18 is driven by the shaft 10 to move downwards, the valve core 18 can be contacted with the opening at the top end of the valve body 8 to form a seal.

The bypass valve of the embodiment adopts a self-operated discharging balancing device, adopts a new spring resetting process, and realizes correct and automatic control of cooling water by setting a device for adjusting discharging parameters.

Example two

In this embodiment, the center of the housing 1 is further provided with an adjusting screw 3 in a penetrating manner, the bottom end of the adjusting screw 3 is sequentially provided with a first gasket 4, a first hexagon nut 5 and a cap nut 6, and the shaft 10 is coaxially arranged with the adjusting screw 3 and the cap nut 6. Different discharge parameters are set by changing the size of the air chamber by rotating the adjusting screw 3.

EXAMPLE III

In this embodiment, the housing 1 and the valve body 8 are fixedly connected through a M10X35 hexagonal screw 7. The stability and the sealing degree of the connection between the housing and the valve body are strengthened.

Example four

In this embodiment, a first O-ring 9 is disposed between the housing 1 and the valve body 8, a second O-ring 12 is disposed between the spring 14 and the shaft 10, a third O-ring 13 is disposed between the spring 14 and the valve body 8, a fourth O-ring 16 is disposed between the bush 15 and the shaft 10, and a fifth O-ring 17 is disposed between the bush 15 and the valve body 8. Through setting up O type circle, strengthen the sealing performance in the bypass valve, increase the reliability and the life of device.

EXAMPLE five

In this embodiment, the spool 18 is fixed to the top end of the shaft 10 by a second washer 19 and a second hexagonal nut 20, and the piston 11 is fixed to the bottom end of the shaft 10 by a third hexagonal nut 21. And the connection stability is enhanced by nuts on the basis of fitting installation.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A cooling water bypass valve of a diesel engine is characterized by comprising a housing, a valve body, a shaft, a piston, a spring, a bushing and a valve core, wherein the valve body is arranged at the top of the housing, openings are formed in the top and the bottom of the valve body, a cavity is arranged in the valve body, the cavity is in an I shape and is divided into an upper cavity, a cavity neck and a lower cavity, the shaft is arranged in the center of the cavity, the piston is arranged at the bottom end of the shaft in a matched mode, an air cavity is formed between the lower end face of the piston and the top end face of the housing, a control pressure air inlet for introducing external control pressure into the air cavity is arranged in the housing, the spring is arranged between the piston and the top end face of the lower cavity, the bushing is arranged in the middle of the shaft in a surrounding mode, the top end of the bushing is erected on the bottom end face of, when the valve core moves downwards under the driving of the shaft, the valve core can contact with the opening at the top end of the valve body to form sealing, an adjusting screw penetrates through the center of the housing, a first gasket, a first hexagon nut and a cap nut are sequentially arranged at the bottom end of the adjusting screw, and the shaft, the adjusting screw and the cap nut are coaxially arranged.

2. The diesel engine cooling water bypass valve of claim 1, wherein the housing and the valve body are fixedly connected by M10X35 hex screws.

3. The diesel engine cooling water bypass valve of claim 1, wherein a first O-ring is disposed between the housing and the valve body, a second O-ring is disposed between the spring and the shaft, a third O-ring is disposed between the spring and the valve body, a fourth O-ring is disposed between the bushing and the shaft, and a fifth O-ring is disposed between the bushing and the valve body.

4. The diesel engine cooling water bypass valve of claim 1, wherein the spool is fixed to the top end of the shaft by a second washer and a second hex nut, and the piston is fixed to the bottom end of the shaft by a third hex nut.