CN217873032U

CN217873032U - Cylinder head

Info

Publication number: CN217873032U
Application number: CN202221172188.4U
Authority: CN
Inventors: 陈世江
Original assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-11-22
Anticipated expiration: 2032-05-16

Abstract

The utility model discloses a cylinder head relates to engine technical field. The cylinder cover comprises a cylinder cover body, a safety valve and a gland, wherein a mounting hole is formed in the cylinder cover body, and the safety valve is pressed in the mounting hole by the gland; an explosion detection hole communicated with an air inlet hole of the safety valve is formed in the cylinder cover fire surface of the cylinder cover body; the safety valve and the inner wall of the mounting hole enclose a leakage cavity communicated with an exhaust hole of the safety valve; and the cylinder cover body is provided with a leakage channel for communicating the leakage cavity with the outside. The utility model discloses the cylinder head can provide permanent pretightning force to its relief valve, has improved the security performance of cylinder head.

Description

Cylinder head

Technical Field

The utility model relates to the technical field of engines, concretely relates to cylinder head.

Background

In the field of medium-speed marine engines, a safety valve is required to be arranged on an engine with a cylinder diameter larger than 200mm, and when the pressure in a cylinder exceeds a given pressure, the safety of the engine is ensured by releasing the pressure through the safety valve.

At present, a safety valve of an engine is mainly screwed on the outside of a cylinder head through a thread structure, and the safety valve and the cylinder head are sealed through a sealing gasket. Although the installation form can satisfy the user demand, be connected through helicitic texture and cylinder head and need regularly exert certain pretightning force, after long-term high temperature environment uses, the pretightning force descends, if not screw up the relief valve once more and can lead to seal ring failure, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

To the above defect that prior art exists, the utility model provides a cylinder head, this cylinder head can provide permanent pretightning force to its relief valve, has improved the security performance of cylinder head.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the cylinder cover comprises a cylinder cover body, a safety valve and a gland, wherein a mounting hole is formed in the cylinder cover body, and the safety valve is pressed and mounted in the mounting hole by the gland; the cylinder cover fire surface of the cylinder cover body is provided with an explosion detection hole communicated with the air inlet hole of the safety valve; the safety valve and the inner wall of the mounting hole enclose a leakage cavity communicated with an exhaust hole of the safety valve; and the cylinder cover body is provided with a leakage channel for communicating the leakage cavity with the outside.

The safety valve comprises a shell with an installation cavity, a piston and an elastic piece, wherein the piston and the elastic piece are arranged in the shell, the air inlet hole and the exhaust hole are formed in the shell and communicated with the installation cavity, the piston is used for compressing the elastic piece under the pushing of high-temperature gas to realize the conduction of the air inlet hole and the exhaust hole, or the cut-off of the air inlet hole and the exhaust hole is realized under the pushing of the elastic piece.

The shell comprises a valve body and a valve seat, the valve seat is detachably connected to one end of the valve body, and the valve seat and the valve body jointly enclose to form the installation cavity; the inlet port sets up the other end of valve body, the inlet port end of valve body with be provided with seal structure between the cylinder cap body, gland pressure equipment is in the valve seat end of valve body.

The piston comprises a valve core for plugging the air inlet hole and a mounting seat arranged on the valve core, and the elastic piece is arranged between the mounting seat and the valve seat.

The valve core comprises a plugging section, a connecting section and a mounting section which are connected in sequence, the radial size of the connecting section is larger than that of the plugging section and that of the mounting section, and the plugging section is provided with a conical end matched with the conical outlet; the mounting seat is sleeved on the mounting section.

The plugging section, the connecting section and the valve body jointly enclose a buffer air chamber, and the air inlet and the air outlet are respectively communicated with the buffer air chamber.

The mounting seat comprises a limiting part, a protruding part arranged on the limiting part and a sleeving hole penetrating through the limiting part and the positioning part, the mounting seat is sleeved on the mounting section through the sleeving hole, and one end of the elastic piece is sleeved on the positioning part.

Wherein, the disk seat is provided with the constant head tank, the other end setting of elastic component is in the constant head tank.

The end part of the mounting section is provided with a groove used for being matched with a grinding tool, and the valve seat and the elastic piece are respectively provided with a through hole for the grinding tool to pass through.

The valve seat is in threaded connection with the inside of the valve body, and the valve body is in threaded connection with a compression nut used for compressing the valve seat.

By adopting the technical scheme, the beneficial effects of the utility model are that:

the utility model provides a cylinder cover, according to the characteristics of sealing medium high temperature, abandons threaded connection's installation form, adopts the structural style of being provided with the mounting hole in the cylinder cover body, with the relief valve through the gland pressure equipment in this mounting hole, even after long-term use, the gland still can provide permanent pretightning force to the relief valve, has eliminated the potential safety hazard, has improved the security performance of cylinder cover; meanwhile, the safety valve is pressed in the cylinder cover body, so that the leakage channel can be designed in a place which can not be completely contacted by people, and the safety performance of the cylinder cover is further improved.

Drawings

Fig. 1 is a schematic structural view of a cylinder head according to the present invention;

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

in the figure: a. a safety valve; 1. a cylinder head body; 11. cylinder cover hot surface; 12. detecting a blast hole; 13. a leakage path; 2. a gland; 3. a leakage cavity; 4. a valve body; 41. an air inlet; 42. an exhaust hole; 5. a valve core; 51. a plugging section; 52. a connection section; 53. an installation section; 54. a groove; 6. a mounting seat; 61. a limiting part; 62. a positioning part; 7. an elastic member; 8. a valve seat; 9. a sealing gasket; 10. a buffer air chamber; 14. a compression nut; 15. and locking the bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1 to 3, the cylinder head includes a cylinder head body 1, a safety valve a and a gland 2, wherein a mounting hole is formed in the cylinder head body 1, and the safety valve a is pressed in the mounting hole by the gland 2; the cylinder cover fire surface 11 of the cylinder cover body 1 is provided with an explosion measuring hole 12 communicated with an air inlet 41 of the safety valve a; the safety valve a and the inner wall of the mounting hole enclose a leakage cavity 3 communicated with the exhaust hole 42 of the safety valve a, and the leakage cavity 3 is an annular cavity; the cylinder cover body 1 is provided with a leakage channel 13 which is communicated with the leakage cavity 3 and the outside.

The safety valve a in this embodiment includes a housing having an installation cavity, and a piston and an elastic member 7 disposed in the housing, wherein the air inlet 41 and the air outlet 42 are disposed on the housing and communicated with the installation cavity, and the piston is used to compress the elastic member 7 under the push of the high-temperature gas to achieve the conduction of the air inlet 41 and the air outlet 42, or to achieve the cutting of the air inlet 41 and the air outlet 42 under the push of the elastic member 7.

Specifically, the shell comprises a valve body 4 and a valve seat 8, wherein the valve seat 8 is detachably connected to one end of the valve body 4 and forms an installation cavity together with the valve body 4; the air inlet 41 is arranged at the other end of the valve body 4, a sealing structure is arranged between the air inlet end of the valve body 4 and the cylinder cover body 1, and the gland 2 is pressed at the valve seat end of the valve body 4.

The sealing structure in this embodiment is a sealing washer 9, after the sealing washer 9 and the safety valve a are sequentially installed in the installation hole, the gland 2 is fixed on the cylinder head body 1 through two locking bolts 15, and the sealing washer 9 and the safety valve a are pressed in the installation hole together by the gland 2.

The piston in the embodiment comprises a valve core 5 for blocking the air inlet hole 41 and a mounting seat 6 arranged on the valve core 5, and an elastic piece 7 is arranged between the mounting seat 6 and a valve seat 8.

In this embodiment, two ends of the air inlet 41 are respectively a conical inlet and a conical outlet, the valve core 5 includes a plugging section 51, a connecting section 52 and an installation section 53 which are connected in sequence, the radial size of the connecting section 52 is larger than that of the plugging section 51 and the installation section 53, and the plugging section 51 has a conical end matched with the conical outlet; the mounting seat 6 is sleeved on the mounting section 53.

In order to improve the pressure relief effect, the blocking section 51, the connecting section 52 and the valve body 4 in this embodiment together enclose the buffer air chamber 10, and the air inlet 41 and the air outlet 42 are respectively communicated with the buffer air chamber 10.

The mounting seat 6 in this embodiment includes a limiting portion 61, a positioning portion 62 protruding from the limiting portion 61, and a sleeving hole penetrating through the limiting portion 61 and the positioning portion 62, the mounting seat 6 is sleeved on the mounting section 53 through the sleeving hole, and one end of the elastic member 7 is sleeved on the positioning portion 62; the valve seat 8 is provided with a positioning groove in which the other end of the elastic member 7 is disposed. By adopting the structure, the elastic part 7 is prevented from being dislocated in the using process, and the stability of the elastic part 7 in the using process is improved.

Because in the valve part production process, general processing can not guarantee complete sealing, therefore, grinding is required, in this embodiment, a groove 54 for matching with a grinding tool is arranged at the end part of the installation section 53, meanwhile, through holes (not shown in the figure) for the grinding tool to pass through are respectively arranged on the valve seat 8 and the elastic part 7, after the safety valve a is assembled, the grinding tool is inserted into the groove 54 from the through holes of the valve seat 8 and the elastic part 7, and the grinding tool drives the valve core 5 to rotate, so that grinding between the conical end of the valve core 5 and the conical outlet of the air inlet 41 is realized.

The elastic member 7 is preferably a cylindrical spring in this embodiment because of its strong restoring ability.

The valve seat 8 in this embodiment is screwed into the valve body 4, and in order to further improve the safety performance of the cylinder head, a compression nut 14 for compressing the valve seat 8 is screwed into the valve body 4 in this embodiment.

Above detailed introduction the utility model discloses the structure of cylinder head compares with prior art, the utility model discloses the cylinder head has higher security performance, is worth promoting.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative work from the above conception, and all the changes fall within the protection scope of the present invention.

Claims

1. The cylinder cover is characterized by comprising a cylinder cover body, a safety valve and a gland, wherein a mounting hole is formed in the cylinder cover body, and the safety valve is pressed in the mounting hole by the gland;

an explosion detection hole communicated with an air inlet hole of the safety valve is formed in the cylinder cover fire surface of the cylinder cover body; the safety valve and the inner wall of the mounting hole enclose a leakage cavity communicated with an exhaust hole of the safety valve; and the cylinder cover body is provided with a leakage channel for communicating the leakage cavity with the outside.

2. The cylinder head according to claim 1, wherein the relief valve includes a housing having a mounting cavity, and a piston and an elastic member provided in the housing,

the air inlet hole with the exhaust hole sets up on the casing and with the installation cavity is linked together, the piston is used for compressing under the promotion of high temperature gas the elastic component is in order to realize switching on the air inlet hole with the exhaust hole, or realize cutting off under the promotion of elastic component the air inlet hole with the exhaust hole.

3. The cylinder head of claim 2, wherein said housing includes a valve body and a valve seat removably attached to one end of said valve body and cooperating with said valve body to define said mounting cavity; the air inlet is arranged at the other end of the valve body, a sealing structure is arranged between the air inlet end of the valve body and the cylinder cover body, and the press cover is pressed at the valve seat end of the valve body.

4. The cylinder head according to claim 3, wherein the piston includes a valve element for closing off the intake port and a mount provided on the valve element, the elastic member being provided between the mount and the valve seat.

5. The cylinder head of claim 4, wherein the two ends of the intake port are respectively a conical inlet and a conical outlet, the valve core comprises a plugging section, a connecting section and a mounting section which are connected in sequence, the radial dimension of the connecting section is larger than that of the plugging section and the mounting section, and the plugging section is provided with a conical end matched with the conical outlet; the mounting seat is sleeved on the mounting section.

6. The cylinder head of claim 5, wherein the plugging section, the connecting section and the valve body together define a buffer air chamber, and the air inlet hole and the air outlet hole are respectively communicated with the buffer air chamber.

7. The cylinder head according to claim 5, wherein the mount base includes a stopper portion, a positioning portion protruding from the stopper portion, and a fitting hole penetrating through the stopper portion and the positioning portion, the mount base is fitted to the mount section through the fitting hole, and an end of the elastic member is fitted to the positioning portion.

8. The cylinder head of claim 7, wherein the valve seat is provided with a positioning groove, and the other end of the elastic member is disposed in the positioning groove.

9. The cylinder head of claim 7, wherein the end of the mounting section is provided with a groove for matching with a grinding tool, and the valve seat and the elastic member are respectively provided with a through hole for the grinding tool to pass through.

10. The cylinder head of claim 3, wherein the valve seat is threaded within the valve body, and a compression nut for compressing the valve seat is threaded within the valve body.