Bend drainage inflatable cylinder cover valve leakage test sealing device

Abstract

The invention provides a bend drainage inflatable cylinder cover valve leakage test sealing device, and relates to the technical field of cylinder cover valve sealing, the bend drainage inflatable cylinder cover valve leakage test sealing device comprises a cylinder cover valve sealing plate and a switching seat, four vent grooves B are processed in the switching seat, four ring grooves are processed in the surface of the switching seat, and sealing rings are embedded in the four ring grooves. A sealing gasket is arranged at the bottom of the cylinder cover valve sealing plate, a bottom plate is arranged at the bottom of the sealing gasket, four bases are integrally formed on the surface of the bottom of the bottom plate, and four connectors are machined on the surfaces of the four bases; according to the technical scheme, four rotatable switching seats are arranged in the cylinder cover valve sealing plate, four sealing rings are arranged on the switching seats, and when column heads on the switching seats stretch into adjusting arc grooves in the cylinder cover valve sealing plate, the adjusting arc grooves and the column heads can be used for controlling the rotating angles of the switching seats; and the cylinder cover valve sealing plate can conveniently carry the switching seat to be applied to new and old cylinder cover valves.

Description

Technical Field

[0001] The present invention relates to the technical field of cylinder head valve sealing, and particularly to a bend-drainage inflatable cylinder head valve leak test sealing device. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including, for example, internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, an internal combustion engine usually converts chemical energy into mechanical energy. An engine is applicable to power generating devices and can also refer to the entire machine including the power device (such as: gasoline engine, aeroengine).

[0003] The engine block is the framework of the engine, the installation foundation of each mechanism and each system of the engine. All the main parts and accessories of the engine are installed inside and outside it, and it bears various loads. The engine block group is mainly composed of parts such as a cylinder block, a cylinder liner, a cylinder head, and a cylinder gasket. A cylinder refers to a cylindrical metal part that guides a piston to perform a linear reciprocating motion in the cylinder. Air expands in the engine cylinder to convert thermal energy into mechanical energy, and gas is compressed by a piston in the compressor cylinder to increase pressure.

[0004] Engine valve testing can optimize to a certain extent problems such as the energy conversion efficiency in the engine cylinder and the unstable idling of the vehicle. During the process of engine valve testing, in order to ensure the accuracy of the test results, it is necessary to ensure that the cylinder head valve is sealed by a tooling. Subsequently, the airtightness between the valve and the cylinder head valve seat ring is inspected by inflating the equipment. The inflation process requires a sealing device to seal the periphery of the valve seat ring, so as to ensure that the internal cavity pressure can be maintained after inflation.

[0005] During engine valve testing, the cylinder head valve is adaptively installed with a tooling. After filling with a sealing washer, the sealing effect can be ensured. However, with the development of technology and the iteration of the engine block, the valve holes on the old cylinder head valves, which were originally a group of four vertical rectangles, have changed to a group of four inclined rectangles. It is difficult to continue the sealing work of the new cylinder head valves with the original cylinder head valve tooling. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the embodiment of the present application provides a bend-drainage inflatable cylinder head valve leak test sealing device. By arranging four rotatable switching seats inside the cylinder head valve sealing plate, and four sealing rings are arranged on the switching seats. When the studs on the switching seats extend into the adjusting arc grooves on the cylinder head valve sealing plate, the rotation angle of the switching seats can be controlled by using the adjusting arc grooves and the studs, so as to achieve the switching of the four sealing rings driven by the switching seats between the vertical rectangle state and the inclined rectangle state, facilitating the technical effect that the cylinder head valve sealing plate carries the switching seats and is applied to new and old cylinder head valves.

[0007] The technical solution adopted by the embodiment of the present application to solve its technical problems is as follows:

[0008] A curved-channel drainage inflatable cylinder head valve leak detection sealing device, including a cylinder head valve sealing plate and a switching seat. There are four switching seats, all of which are rotatably connected to the inside of the cylinder head valve sealing plate;

[0009] Four air vent grooves B are machined inside the switching seat, and four annular grooves are machined on the surface of the switching seat. Sealing rings are embedded in the four annular grooves. A sealing gasket is arranged at the bottom of the cylinder head valve sealing plate, a bottom plate is arranged at the bottom of the sealing gasket, and four bases are integrally formed on the bottom surface of the bottom plate. Four connectors are machined on the surfaces of the four bases;

[0010] Among them, the bottom plate is assembled and fixed with the cylinder head valve sealing plate, the four switching seats are encapsulated between the bottom plate and the cylinder head valve sealing plate, and the gap between the bottom plate and the cylinder head valve sealing plate is filled with the sealing gasket.

[0011] In a possible implementation manner, four air vent grooves A extending towards the inside of the bottom plate are machined inside the four bases, the interiors of the four connectors are respectively communicated with the interiors of the four air vent grooves A, and the four air vent grooves A correspond to the four air vent grooves B on the switching seat one by one.

[0012] In a possible implementation manner, four cushion rings are integrally formed on the top surface of the bottom plate, and the diameter of the cushion rings is smaller than the diameter of the switching seat; the four cushion rings correspond to the four bases. After the bottom plate and the cylinder head valve sealing plate are assembled and fixed, the cushion rings extend into the inside of the sealing gasket, and the top surface is in contact with the bottom surface of the switching seat, and the sealing gasket is laid on the bottom surface of the switching seat.

[0013] In a possible implementation manner, column heads are integrally formed on the outer surfaces of the tops of the four switching seats, and a plurality of adjusting arc grooves are machined inside the cylinder head valve sealing plate; the top surface of the switching seat is flush with the top surface of the cylinder head valve sealing plate, so that the sealing ring extends out of the inside of the cylinder head valve sealing plate, and the column head extends into the inside of the adjusting arc groove. When the switching seat rotates inside the cylinder head valve sealing plate, the column head slides inside the adjusting arc groove.

[0014] In a possible implementation manner, a column groove is machined inside the column head, and a spherical surface is machined at one end of the column head, so that the end surface of the column head is sunken.

[0015] In a possible implementation, strip grooves are machined on both sides of the cylinder head valve sealing plate, and a plurality of cushion blocks are assembled and connected to the cylinder head valve sealing plate at the strip grooves; one end of the plurality of cushion blocks is lower than the surface of the sealing ring, and when the sealing ring is compressed, it is supported by the cushion blocks. The plurality of cushion blocks are combined in pairs and are symmetrically distributed on both sides of the axis of the switching seat respectively.

[0016] In a possible implementation, two straight cutting grooves are machined on the surface of the gasket, and a threaded stud A is machined at one end of the gasket. The threaded stud A is threadedly connected to the inside of the cylinder head valve sealing plate by controlling the cooperation of the threaded stud A and the straight cutting groove with a wrench.

[0017] In a possible implementation, a rubber gasket A is sleeved and connected to the outside of the threaded stud A. The threaded stud A is threadedly connected to the inside of the cylinder head valve sealing plate, and the cushion block presses the rubber gasket A against the bottom inner wall of the strip groove.

[0018] In a possible implementation, a plurality of positioning pins are assembled and connected to the top of one side of the cylinder head valve sealing plate, and the cylinder head valve sealing plate is adaptively connected to the cylinder head through positioning by the plurality of positioning pins.

[0019] In a possible implementation, a threaded stud B is machined at one end of the positioning pin, a rubber gasket B is sleeved and connected to the outside of the threaded stud B, and one end of the threaded stud B is threadedly connected to the inside of the cylinder head valve sealing plate.

[0020] The beneficial effects of this application are as follows:

[0021] First, in this solution, by arranging a gasket and a bottom plate at the bottom of the cylinder head valve sealing plate, when the bottom plate and the cylinder head valve sealing plate are assembled and fixed, and the gasket ring extends into the inside of the gasket and abuts against the surface of the switching seat, after the gasket seals between the cylinder head valve sealing plate and the bottom plate, it can prevent the gasket from affecting the rotation of the switching seat inside the cylinder head valve sealing plate.

[0022] Second, in this solution, by arranging four rotatable switching seats inside the cylinder head valve sealing plate, and four sealing rings are arranged on the switching seats. When the column heads on the switching seats extend into the adjusting arc grooves on the cylinder head valve sealing plate, the rotation angle of the switching seats can be controlled by using the adjusting arc grooves and the column heads, so as to support the switching seats to drive the four sealing rings to switch between the vertical rectangular state and the inclined rectangular state, which is convenient for the cylinder head valve sealing plate to carry the switching seat and be applied to new and old cylinder head valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention in the use state;

[0024] Figure 2 It is an exploded view of the present invention;

[0025] Figure 3 is a cross-sectional view of the present invention;

[0026] Figure 4 is a schematic structural view of the bottom plate of the present invention;

[0027] Figure 5 is the present invention Figure 1 a magnified structural view of part A in;

[0028] Figure 6 is the present invention Figure 1 a magnified structural view of part B in;

[0029] Figure 7 is the present invention Figure 3 a magnified structural view of part C in;

[0030] Figure 8 is a schematic structural view of the switching base of the present invention;

[0031] Figure 9 is a cross-sectional view of the switching base of the present invention;

[0032] Figure 10 is a schematic structural view of the cushion block of the present invention;

[0033] Figure 11 is a schematic structural view of the positioning pin of the present invention.

[0034] Reference numerals: 1, cylinder head valve sealing plate; 2, adjusting arc groove; 3, sealing ring; 4, stud head; 5, bottom plate; 6, gasket; 7, switching base; 8, strip groove; 9, base; 10, ventilation groove A; 11, spacer ring; 12, joint; 13, ventilation groove B; 14, positioning pin; 15, column groove; 16, cushion block; 17, straight cutting groove; 18, threaded column A; 19, rubber gasket A; 20, threaded column B; 21, rubber gasket B. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present application are to solve the problems in the above-mentioned background technology, and the general idea is as follows:

[0036] Embodiment 1:

[0037] This embodiment introduces the specific structure of a curved-channel drainage inflatable cylinder head valve leak detection sealing device. Specifically, referring to Figures 1 - 6 , Figure 8 and Figure 9 as shown, it includes a cylinder head valve sealing plate 1 and four switching bases 7 that are all rotatably connected inside the cylinder head valve sealing plate 1. Four ventilation grooves B 13 are machined inside the switching base 7, and four annular grooves are machined on the surface of the switching base 7. Sealing rings 3 are embedded in the four annular grooves;

[0038] Among them, by making the top surface of the switching base 7 flush with the top surface of the cylinder head valve sealing plate 1, the sealing ring 3 extends from the inside of the cylinder head valve sealing plate 1. When the cylinder head valve sealing plate 1 is assembled to the cylinder head, the switching base 7 is rotated so that the four sealing rings 3 on the switching base 7 correspond to the cylinder head valves, and the cylinder head valves are ventilated at the four ventilation grooves B13 on the switching base 7. The switching base 7 is sealed with the cylinder head valves through the four ventilation grooves B13 to support the smooth progress of the inflation and pressure-holding work during the subsequent leak test;

[0039] As Figures 1 to 3 shown, a gasket 6 is provided at the bottom of the cylinder head valve sealing plate 1, a bottom plate 5 is provided at the bottom of the gasket 6, four bases 9 are integrally formed on the bottom surface of the bottom plate 5, four connectors 12 are machined on the surfaces of the four bases 9, and four ventilation grooves A10 extending into the bottom plate 5 are machined inside the four bases 9;

[0040] Among them, by making the inside of the four connectors 12 communicate with the inside of the four ventilation grooves A10 respectively, and the four ventilation grooves A10 correspond to the four ventilation grooves B13 on the switching base 7 one by one, when the switching base 7 is rotated inside the cylinder head valve sealing plate 1, the ventilation grooves B13 on the switching base 7 can always be kept in a communicating state with the ventilation grooves A10. One end of each of the four connectors 12 can be connected to a pipeline and the pipeline can be bent at any angle to support the introduction of gas;

[0041] At the same time, by making the four cushion rings 11 correspond to the four bases 9, after the bottom plate 5 and the cylinder head valve sealing plate 1 are assembled and fixed, the gasket 6 can be laid on the bottom surface of the switching base 7;

[0042] Secondly, by assembling and fixing the bottom plate 5 and the cylinder head valve sealing plate 1, the four switching bases 7 are encapsulated between the bottom plate 5 and the cylinder head valve sealing plate 1, which can ensure the state of the switching base 7 inside the cylinder head valve sealing plate 1 and prevent the switching base 7 from shaking inside the cylinder head valve sealing plate 1, and only support the rotation of the switching base 7 inside the cylinder head valve sealing plate 1;

[0043] At the same time, after the bottom plate 5 and the cylinder head valve sealing plate 1 are assembled, the gasket 6 fills the gap between the bottom plate 5 and the cylinder head valve sealing plate 1. When the cylinder head valve sealing plate 1 is assembled to the cylinder head valve and the periphery of the valve hole is sealed by multiple sealing rings 3, the gasket 6 can seal the back of the cylinder head valve sealing plate 1 without being affected by the rotation of the switching base 7 outside the cylinder head valve sealing plate 1;

[0044] Furthermore, in order to prevent the gasket 6 used for sealing between the bottom plate 5 and the cylinder head valve sealing plate 1 from being compressed after the bottom plate 5 and the cylinder head valve sealing plate 1 are assembled and fixed, thereby hindering the rotation of the switching base 7 inside the cylinder head valve sealing plate 1, as Figure 2 、 Figure 3 andFigure 6 As shown, four cushion rings 11 are integrally formed on the top surface of the bottom plate 5. The diameter of the cushion ring 11 is smaller than the diameter of the switching seat 7. By inserting the cushion ring 11 into the inside of the gasket 6 and making the top surface fit with the bottom surface of the switching seat 7, an isolation can be formed between the gasket 6 and the switching seat 7, and a support can be formed on the surface of the switching seat 7 to prevent the switching seat 7 from moving along its axis inside the cylinder head valve sealing plate 1;

[0045] In some examples, studs 4 are integrally formed on the outer surfaces of the tops of the four switching seats 7, and a plurality of adjusting arc grooves 2 are machined inside the cylinder head valve sealing plate 1;

[0046] Among them, when assembling the bottom plate 5 and the cylinder head valve sealing plate 1 and encapsulating the switching seat 7 into the inside of the cylinder head valve sealing plate 1, the stud 4 extends into the inside of the adjusting arc groove 2. When controlling the rotation of the switching seat 7 inside the cylinder head valve sealing plate 1, the stud 4 can slide inside the adjusting arc groove 2, and the rotation angle of the switching seat 7 can be controlled by using the adjusting arc groove 2 and the stud 4 to support the switching seat 7 to drive the four sealing rings 3 to switch between the vertical rectangular state and the inclined rectangular state (in the horizontal projection plane), which is convenient for simultaneous application at the new and old cylinder head valves;

[0047] Secondly, in order to facilitate controlling the sliding of the stud 4 inside the adjusting arc groove 2 to drive the rotation of the switching seat 7 and the cylinder head valve sealing plate 1 inside, as Figure 5 shown, a column groove 15 is machined inside the stud 4. By machining a spherical surface at one end of the stud 4 to make the end face of the stud 4 recessed, a support point can be provided for manual operation by the staff when controlling the stud 4;

[0048] At the same time, with the help of the column groove 15 machined inside the stud 4, when the switching seat 7 is clamped into the inside of the cylinder head valve sealing plate 1, a tool can be inserted into the column groove 15, and a knocking force or pressure inclined to the axis direction of the stud 4 can be used to force the stud 4 to slide inside the adjusting arc groove 2.

[0049] The above design sets four rotatable switching seats 7 inside the cylinder head valve sealing plate 1, and four sealing rings 3 are configured on the switching seat 7, and a gasket 6 and a bottom plate 5 are arranged at the bottom of the cylinder head valve sealing plate 1. When assembling and fixing the bottom plate 5 and the cylinder head valve sealing plate 1 and making the cushion ring 11 extend into the inside of the gasket 6 and abut against the surface of the switching seat 7, after the gasket 6 seals between the cylinder head valve sealing plate 1 and the bottom plate 5, it can be avoided that the gasket 6 affects the rotation of the switching seat 7 inside the cylinder head valve sealing plate 1;

[0050] Meanwhile, by machining the stud 4 on the top surface outside the switching base 7, when the switching base 7 is encapsulated into the cylinder head valve sealing plate 1, the stud 4 extends into the adjusting arc groove 2 machined on the cylinder head valve sealing plate 1. When using the adjusting arc groove 2 and the stud 4 to control the rotation angle of the switching base 7, it is possible to support the switching base 7 to drive the four sealing rings 3 to switch between the vertical rectangular state and the inclined rectangular state (in the horizontal projection plane), so as to support the cylinder head valve sealing plate 1 to carry the switching base 7 and be applied to the new and old cylinder head valves, which is beneficial for application.

[0051] Embodiment 2:

[0052] Based on Embodiment 1, this embodiment introduces the specific structure of a curved-channel drainage inflatable cylinder head valve leak test sealing device, as Figures 1 to 3 , Figure 7 , Figure 10 and Figure 11 shown. Strip-shaped grooves 8 are machined on both sides of the cylinder head valve sealing plate 1, and a plurality of cushion blocks 16 are assembled and connected to the cylinder head valve sealing plate 1 at the strip-shaped grooves 8;

[0053] Among them, by making one end of the plurality of cushion blocks 16 lower than the surface of the sealing ring 3, when the sealing ring 3 is compressed, it is supported by the cushion blocks 16 (the plurality of cushion blocks 16 are combined in pairs and are symmetrically distributed on both sides of the axis of the switching base 7), so as to ensure the clearance distance between the cylinder head and the cylinder head valve sealing plate 1 when the equipment presses the cylinder head downward during the leak test process and prevent the sealing ring 3 from being damaged;

[0054] Meanwhile, in order to facilitate the disassembly and assembly of the cushion blocks 16 on the top of the cylinder head valve sealing plate 1, as Figure 1 and Figure 10 shown, two straight cutting grooves 17 are machined on the surface of the gasket 6, and a threaded stud A18 is machined at one end of the gasket 6. A rubber gasket A19 is sleeved and connected to the outside of the threaded stud A18. By using a wrench in cooperation with the straight cutting grooves 17, the threaded stud A18 can be screwed into the inside of the cylinder head valve sealing plate 1 by rotating the cushion block 16 to adjust the threaded connection state between the threaded stud A18 and the cylinder head valve sealing plate 1. When the threaded stud A18 is screwed into the inside of the cylinder head valve sealing plate 1, the cushion block 16 can press the rubber gasket A19 against the bottom inner wall of the strip-shaped groove 8 to prevent the threaded stud A18 and the cylinder head valve sealing plate 1 from loosening, and control the distance between the surfaces of the plurality of cushion blocks 16 higher than the surface of the cylinder head valve sealing plate 1 according to the degree of extrusion of the rubber gasket A19;

[0055] In some instances, a plurality of positioning pins 14 are assembled and connected to the top of one side of the cylinder head valve sealing plate 1. A threaded stud B20 is machined at one end of the positioning pin 14, and a rubber gasket B21 is sleeved and connected to the outside of the threaded stud B20;

[0056] Among them, by threadedly connecting one end of the threaded stud B20 to the inside of the cylinder head valve sealing plate 1, the cylinder head valve sealing plate 1 can be positioned and adaptively connected to the cylinder head through a plurality of positioning pins 14, ensuring that the four sealing rings 3 on the four switching seats 7 are respectively aligned with the cylinder head valve holes.

[0057] Through the above design, by setting the positioning pins 14 (the threaded stud B20 machined at one end thereof is threadedly connected to the cylinder head valve sealing plate 1) fixedly assembled with the cylinder head valve sealing plate 1, when the cylinder head valve sealing plate 1 is installed on the cylinder head, the cylinder head valve sealing plate 1 can be made to cooperate with the holes on the cylinder head by means of the positioning pins 14, so that the four switching seats 7 on the cylinder head valve sealing plate 1 carry the sealing rings 3 at corresponding positions to seal the cylinder head valve;

[0058] Meanwhile, by using the cushion block 16 (the threaded stud A18 machined at one end thereof is threadedly connected to the cylinder head valve sealing plate 1) fixedly assembled with the cylinder head valve sealing plate 1, during the leak test, when the equipment presses the cylinder head downwards, by means of the surface of the cushion block 16 abuting against the cylinder head, the clearance distance between the cylinder head and the cylinder head valve sealing plate 1 is controlled to prevent the sealing ring 3 from being damaged due to excessive extrusion.

[0059] Finally, it should be noted that: Obviously, the above embodiments are merely examples given for clearly explaining the present invention and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A curve drainage inflatable cylinder head valve leak testing and sealing device, characterized in that: include: Cylinder head valve sealing plate (1); Four switching seats (7) are provided and are all rotatably connected to the inside of the cylinder head valve sealing plate (1); The switching seat (7) is internally machined with four ventilation grooves B (13), the surface of the switching seat (7) is machined with four annular grooves, the interiors of the four annular grooves are each embedded with a sealing ring (3), the bottom of the cylinder head valve sealing plate (1) is provided with a sealing gasket (6), the bottom of the sealing gasket (6) is provided with a bottom plate (5), the bottom surface of the bottom plate (5) is integrally formed with four bases (9), and the surfaces of the four bases (9) are each machined with four joints (12); The base plate (5) is assembled and fixed to the cylinder head valve sealing plate (1), four switching seats (7) are encapsulated between the base plate (5) and the cylinder head valve sealing plate (1), and a sealing gasket (6) is used to fill the gap between the base plate (5) and the cylinder head valve sealing plate (1).

2. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 1, characterized in that: The four bases (9) are each machined with four ventilation grooves A (10) extending into the bottom plate (5); the interiors of the four joints (12) are respectively connected to the interiors of the four ventilation grooves A (10); and the four ventilation grooves A (10) correspond one-to-one to the four ventilation grooves B (13) on the switching seat (7).

3. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 1, characterized in that: Four gasket rings (11) are integrally formed on the top surface of the bottom plate (5), and the diameter of the gasket rings (11) is smaller than the diameter of the switching seat (7); The four gaskets (11) correspond to the four bases (9), and after the base plate (5) and the cylinder head valve sealing plate (1) are assembled and fixed, the gasket (11) extends into the interior of the sealing gasket (6), and the top surface fits with the bottom surface of the switching seat (7), so that the sealing gasket (6) is laid on the bottom surface of the switching seat (7).

4. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 1, characterized in that: The outer surfaces of the tops of the four switching seats (7) are all integrally formed with column heads (4), and the cylinder head valve sealing plate (1) is internally processed with a plurality of adjustment arc grooves (2); The top surface of the switching seat (7) is flush with the top surface of the cylinder head valve sealing plate (1), so that the sealing ring (3) extends from the inside of the cylinder head valve sealing plate (1), and the column head (4) extends into the inside of the adjustment arc groove (2). When the switching seat (7) rotates inside the cylinder head valve sealing plate (1), the column head (4) slides inside the adjustment arc groove (2).

5. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 4, characterized in that: The interior of the column head (4) is processed with a column groove (15), and one end of the column head (4) is processed with a spherical surface, so that the end surface of the column head (4) is sunken.

6. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 1, characterized in that: Both sides of the cylinder head valve sealing plate (1) are processed with strip grooves (8), and the cylinder head valve sealing plate (1) is assembled and connected with a plurality of pads (16) at the strip grooves (8); One end of the plurality of cushion blocks (16) is lower than the surface of the sealing ring (3), and when the sealing ring (3) is compressed, it is supported by the cushion blocks (16). The plurality of cushion blocks (16) are combined in pairs and are symmetrically distributed on both sides of the axis of the switching seat (7).

7. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 6, characterized in that: The surface of the sealing gasket (6) is processed with two straight grooves (17), and one end of the sealing gasket (6) is processed with a threaded column A (18). The threaded column A (18) is controlled to be threadedly connected to the inside of the cylinder head valve sealing plate (1) by the cooperation of a wrench and the straight groove (17).

8. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 7, characterized in that: The outer part of the threaded column A (18) is sleeve-connected with a rubber gasket A (19), and the threaded column A (18) is threadedly connected to the inside of the cylinder head valve sealing plate (1), so that the gasket (16) presses the rubber gasket A (19) against the bottom inner wall of the strip groove (8).

9. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 1, characterized in that: A plurality of positioning pins (14) are assembled and connected to the top of one side of the cylinder head valve sealing plate (1), and the cylinder head valve sealing plate (1) is positioned and connected to the cylinder head in an adaptable manner through the plurality of positioning pins (14).

10. A curve drainage inflatable cylinder head valve leak testing and sealing device as claimed in claim 9, characterized in that: One end of the positioning pin (14) is processed with a threaded column B (20), the outside of the threaded column B (20) is sleeve-connected with a rubber gasket B (21), and one end of the threaded column B (20) is threadedly connected to the inside of the cylinder head valve sealing plate (1).

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