CN216508298U

CN216508298U - Novel safe manual valve assembly

Info

Publication number: CN216508298U
Application number: CN202122389401.9U
Authority: CN
Inventors: 蒋丰成; 王保松; 魏增源; 楼祎煲
Original assignee: Zhejiang VIE Science and Technology Co Ltd
Current assignee: Zhejiang VIE Science and Technology Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-05-13
Anticipated expiration: 2031-09-29

Abstract

The utility model relates to the field of manual valves and discloses a novel safe manual valve assembly.A manual valve is provided with an air inlet, an air outlet, a first chamber for mounting a manual valve control valve core component and a second chamber for mounting a button valve control valve core component, wherein the air inlet is communicated with the first chamber, the air outlet is communicated with the second chamber, and the first chamber and the second chamber are connected by arranging an air path connecting channel in a valve body; the first chamber is connected with a first exhaust port, the second chamber is communicated with a second exhaust port, a first air inlet valve and a first exhaust valve are arranged in the manual control valve core assembly, and a second air inlet valve and a second exhaust valve are arranged in the button valve control valve core assembly. The technical problem that parking braking fails is fundamentally solved, the button valve structure is integrated, and the air outlet of the manual valve cannot output air even the handle returns to the driving position after the manual valve assembly with the structure is operated by the parking braking, so that the safety of parking braking of the vehicle is guaranteed.

Description

Novel safe manual valve assembly

Technical Field

The utility model relates to the field of manual valves, in particular to a novel safe manual valve assembly.

Background

The manual valve assembly of the automobile is used for operating the emergency brake and the parking brake of the tractor with a spring brake cylinder, and belongs to the air cut-off brake. In general, when a driver performs parking braking, the driver only operates the handle from the driving position to the parking position, the handle is locked, no air pressure is output from the air outlet of the manual valve at the moment, and the vehicle is parked. However, after the driver implements the parking operation, whether the handle is completely in the locking state or not can not be recognized by the driver, if the handle is not completely in the locking state, the handle may be separated from the locking groove under the condition of torsion spring force of the product or external vibration, the handle automatically returns to the driving position, air is output from the air outlet of the manual control valve at the moment, the vehicle is completely in the non-braking force state, and traffic accidents are easy to happen.

The applicant previously filed CN202011064156.8, which has the feature of monitoring the current state of the hand control, but it did not solve the above technical problems, and the applicant has developed a new type of manual valve in combination with the accumulation of the existing technologies.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a novel safety manual control valve assembly.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

a novel safety manual control valve assembly is characterized in that a manual control valve is provided with an air inlet, an air outlet, a first cavity used for installing a manual control valve core assembly and a second cavity used for installing a button valve control valve core assembly, the air inlet is communicated with the first cavity, the air outlet is communicated with the second cavity, and the first cavity is connected with the second cavity through an air circuit connecting channel arranged in a valve body; the first chamber is connected with a first exhaust port, the second chamber is communicated with a second exhaust port, a first air inlet valve and a first exhaust valve are arranged in the manual valve control valve core assembly, and a second air inlet valve and a second exhaust valve are arranged in the button valve control core assembly;

the air inlet is connected to the air inlet valve through an internal air path, the first air inlet valve controls the connection or disconnection of the air inlet and the air path connecting channel, and the first exhaust valve controls the connection or disconnection of the air path connecting channel and the exhaust port; the air inlet valve II controls the communication of the air path connecting channel and the air outlet, and the air outlet valve II controls the communication or disconnection of the air outlet and the air outlet II;

when the automobile is in a driving state, air pressure is input from the air inlet to the control valve core assembly, the air inlet valve I is moved upwards, the air exhaust valve is in a closed state, the air pressure enters the air path connecting channel through the air inlet valve I, the air inlet valve II is opened under the action of the air pressure, the air exhaust valve II is closed, and the air pressure is output from the air outlet;

when parking braking is implemented, the control valve core assembly moves downwards, the air inlet valve I is closed, the air exhaust valve I is opened, compressed air in the air path connecting channel and compressed air between the air path connecting channel and the air outlet are exhausted through the air outlet, meanwhile, air pressure is reduced, the return valve core II returns to close the air inlet valve II, the air exhaust valve II is opened, and the air outlet is communicated with the air outlet II.

Preferably, the manual control valve core assembly comprises a first control valve core and a first return spring, the first control valve core comprises a valve seat, the valve seat comprises a first valve cavity, a valve rod assembly is assembled in the first valve cavity, the valve rod assembly comprises a first valve rod and a second valve rod inserted in the first valve rod, and the second valve rod can slide along the axial direction of the first valve rod; the lower end of the valve seat is assembled with a valve assembly, the valve assembly can slide along the valve seat, the valve assembly further comprises a piston spring, the upper end of the piston spring acts on the lower end of the first valve rod, the lower end of the piston spring acts on the valve assembly, the lower end face of the valve assembly and the lower end of the first valve cavity form a first air inlet valve port, the valve assembly further comprises a supporting seat, the middle of the supporting seat is provided with an air passage communicated with the first air outlet, the lower end of the first return spring acts on the inner side of the air outlet, the other end of the return spring acts on the supporting seat, the upper end edge of the supporting seat and the lower end of the valve assembly form a first air outlet valve, and the upper end of the supporting seat abuts against the lower end of the second valve rod; when the valve rod I slides to overcome the stroke of the idle stroke cavity, acting force can be applied to the valve rod II; when the valve rod moves downwards to push the valve assembly to abut against the lower end of the first valve cavity, the first air inlet valve is closed, the first valve rod continues to move downwards, the piston spring deforms and contracts, the valve rod drives the second valve rod to move downwards to push the supporting seat to move downwards, the supporting seat overcomes the acting force of the first return spring to be separated from the contact with the first valve cavity, and the first exhaust valve is opened.

Preferably, the valve seat further comprises a handle assembly, the lower end of the handle assembly comprises a cam assembly, the cam assembly is abutted against the upper end of the first valve rod, the cam assembly rotates to drive the first valve rod to move up and down, a balance spring is arranged in the valve seat, and the balance spring is supported between the cam assembly and the valve seat.

Preferably, a valve port is formed at the lower end of the first valve cavity, a raised convex lip is arranged on the inner side of the valve port along the edge of the valve port, the convex lip and the bottom surface of the first valve cavity are arranged in an obtuse angle, the outer diameter of the supporting seat is smaller than the aperture formed by the convex lip, and compressed air in the air inlet can enter the air path connecting channel through gaps among the supporting seat, the convex lip and the valve port.

Preferably, the valve further comprises an upper valve body, the second movable cavity is arranged in the upper valve body, the button valve core assembly comprises a push rod assembly and a switch valve, the push rod assembly comprises a push rod, guide ring and button control mechanism, the push rod assembly is installed in second activity intracavity, the lower extreme of going up the valve body is provided with down the valve body, gas vent two sets up under on the valve body, the junction of lower valve body and button valve disk seat is formed with movable chamber, activity chamber one end and two intercommunications of gas vent, the activity chamber other end and gas circuit connecting channel intercommunication, switch valve is located movable intracavity, switch valve fixed mounting is at the lower extreme of push rod and slides from top to bottom under the drive of push rod, the intercommunication of gas circuit connecting channel and activity chamber can be cut off in the valve rebound, the valve moves down and can contradict and cut off the intercommunication of gas vent two and gas circuit connecting channel at the inlet end of gas vent two, activity chamber and gas outlet intercommunication.

Preferably, the first cavity and the second cavity are both arranged on the upper valve body and are arranged in parallel, and the first cavity is communicated with the second cavity through an air path connecting channel arranged in the upper valve body.

Preferably, the gas circuit connecting channel runs through the second chamber, a groove is formed in the lower end face of the joint of the gas circuit connecting channel and the second chamber, the inner diameter of the groove is larger than that of the second chamber, the push rod type pneumatic switch further comprises a push rod return spring, the upper end of the push rod return spring is abutted to the guide ring, and the lower end of the push rod return spring is abutted to the bottom face of the groove.

Preferably, the upper side and the lower side of the switch valve are provided with sealing rings, the thickness and the height of the sealing rings are the same, the cross section of each sealing ring is triangular, and the switch valve is in line contact with the top surface or the bottom surface of the movable cavity through the sealing rings for sealing.

Preferably, the outer edge of the supporting seat is provided with a limiting baffle ring, a limiting step is arranged in the first exhaust port, the limiting baffle ring is connected with a sealing ring, and the limiting baffle ring can be abutted to the surface of the limiting step through the sealing ring.

Through the technical scheme, the utility model has the following technical effects:

the scheme designs a novel safe manual control valve assembly, which fundamentally solves the technical problem of failure of parking braking and integrates a button valve structure, and the manual control valve assembly with the structure has the advantages that as long as the manual control valve assembly implements the parking braking operation, even if a handle returns to a driving position, an air outlet of a manual control valve does not have air output, so that the safety of vehicle parking braking is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the device.

Fig. 2 is an internal schematic view of the manual valve in the driving state.

Fig. 3 is an enlarged view of fig. 2.

Fig. 4 is an internal schematic view of the manual valve in the parking state.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-air inlet, 2-air outlet, 3-first chamber, 4-second chamber, 5-manual control valve core component, 6-button valve control core component, 7-air outlet I, 8-air outlet II, 9-air inlet valve I, 10-air outlet valve I, 11-air inlet valve II, 12-air outlet valve II, 13-air path connecting channel, 15-control valve core I, 16-return spring I, 18-valve seat, 19-first valve cavity, 20-valve rod component, 21-valve rod I, 22-valve rod II, 23-valve assembly, 24-piston spring, 25-air inlet valve port I, 26-supporting seat, 27-idle stroke cavity, 28-handle component, 29-cam assembly, 30-balance spring, 31-valve port, 32-convex lip, 33-upper valve body, 34-push rod assembly, 35-switch valve, 36-push rod, 37-guide ring, 38-button control mechanism, 39-lower valve body, 40-groove, 41-push rod return spring, 42-sealing ring, 43-limit baffle ring, 44-sealing ring, 45-limit step.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A novel safety manual control valve assembly is characterized in that an air inlet 1, an air outlet 2, a first chamber 3 for mounting a manual control valve core assembly 5 and a second chamber 4 for mounting a button valve control core assembly 6 are arranged on a manual control valve, the air inlet 1 is communicated with the first chamber 3, the air outlet 2 is communicated with the second chamber 4, and the first chamber 3 and the second chamber 4 are connected through an air path connecting channel 13 arranged in a valve body; the first chamber 3 is connected with a first exhaust port 7, the second chamber 4 is communicated with a second exhaust port 8, a first air inlet valve 9 and a first exhaust valve 10 are arranged in the manual control valve core assembly 5, and a second air inlet valve 11 and a second exhaust valve 12 are arranged in the button valve control core assembly 6;

the air inlet 1 is connected to an air inlet valve through an internal air path, the air inlet valve I9 controls the connection or disconnection of the air inlet 1 and the air path connecting channel 13, and the air exhaust valve I10 controls the connection or disconnection of the air path connecting channel 13 and the air exhaust port; the air inlet valve II 11 controls the communication between the air path connecting channel 13 and the air outlet 2, and the air outlet valve II 12 controls the communication or disconnection between the air outlet 2 and the air outlet II 8;

when the automobile is in a driving state, air pressure is input from the air inlet 1 to control the valve core assembly to move upwards, the air inlet valve I9 is opened, the air exhaust valve is in a closed state, the air pressure enters the air path connecting channel 13 through the air inlet valve I9, the air inlet valve II 11 is opened under the action of the air pressure, the air exhaust valve II 12 is closed, and the air pressure is output from the air outlet 2; if the first air inlet valve 9 is opened, the corresponding first air outlet valve 10 is necessarily in a closed state, and it is described in detail that the first air inlet 1 is communicated with the first chamber 3, the compressed air of the first air inlet 1 reaches the position of the first air inlet valve 9 through the first chamber 3, at this time, the air path is a passage, the compressed air of the first air inlet 1 enters the position of the air path connecting channel 13, then enters the second chamber 4 through the air path connecting channel 13, the compressed air of the second chamber 4 reaches the position of the second air inlet valve 11, and due to the design relationship of the valves, when the second air inlet valve 11 is opened, the second air outlet valve 12 is necessarily closed;

when parking braking is implemented, the situation is opposite, the control valve core assembly moves downwards, the air inlet valve I9 is closed, the air exhaust valve I10 is opened, compressed air in the air path connecting channel 13 and compressed air between the air path connecting channel 13 and the air outlet 2 are exhausted through the air outlet I7, meanwhile, air pressure is reduced, the return valve core II returns, the air inlet valve II 11 is closed, the air exhaust valve II 12 is opened, and the air outlet 2 is communicated with the air outlet II 8.

The present invention has been described in principle, and a specific structural scheme is given below for the above principle embodiment, and it should be noted that any structural design adopting the above principle should belong to the protection scope of the present invention.

The manual control valve core assembly 5 comprises a control valve core I15 and a return spring I16, the control valve core I15 comprises a valve seat 18, the valve seat 18 comprises a first valve cavity 19, a valve rod assembly 20 is assembled in the first valve cavity 19, the valve rod assembly 20 comprises a valve rod I21 and a valve rod inserted in the valve rod I21, and a valve rod II 22 can slide along the axial direction of the valve rod I21; the lower end of the valve seat 18 is provided with a valve assembly 23, the valve assembly 23 can slide along the valve seat 18, the valve assembly further comprises a piston spring 24, the upper end of the piston spring 24 acts on the lower end of the first valve rod 21, the lower end of the piston spring 24 acts on the valve assembly 23, the lower end face of the valve assembly 23 and the lower end of the first valve cavity 19 form a first air inlet valve port 31-25, the valve assembly further comprises a support seat 26, the middle of the support seat 26 is provided with an air passage communicated with the first air outlet 7, the lower end of the first return spring 16 acts on the inner side of the second air outlet, the other end of the return spring acts on the support seat 26, the edge part of the upper end of the support seat 26 and the lower end of the valve assembly 23 form a first air outlet valve 10, and the upper end of the support seat 26 is abutted against the lower end of the second valve rod 22; when the automobile is in a driving state, the edge of the upper end of the supporting seat 26 abuts against the valve assembly 23, the exhaust valve I10 is in a closed state, an idle stroke cavity 27 is formed between the upper end of the valve rod II 22 and a sliding cavity used for sliding the valve rod II 22 in the valve rod I21, and the valve rod I21 can apply acting force to the valve rod II 22 only by sliding to overcome the stroke of the idle stroke cavity 27; when the first valve rod 21 moves downwards to push the valve assembly 23 to abut against the lower end of the first valve cavity 19, the first air inlet valve 9 is closed, the first valve rod 21 continues to move downwards, the piston spring 24 deforms and contracts, the first valve rod 21 drives the second valve rod 22 to move downwards to push the support seat 26 to move downwards, the support seat 26 overcomes the acting force of the first return spring 16 to be separated from the contact with the first valve assembly 23, and the first exhaust valve 10 is opened.

In this embodiment, the handle assembly 28 is further included, a lower end of the handle assembly 28 includes a cam assembly 29, the cam assembly 29 abuts against an upper end of the first valve rod 21, the cam assembly 29 rotates to drive the first valve rod 21 to move up and down, a balance spring 30 is disposed in the valve seat 18, and the balance spring 30 is supported between the cam assembly 29 and the valve seat 18.

In this embodiment, a valve port 31 is formed at the lower end of the first valve cavity 19, a raised lip 32 is disposed along the edge of the inner side of the valve port 31, the lip 32 and the bottom surface of the first valve cavity 19 form an obtuse angle, the outer diameter of the support seat 26 is smaller than the aperture formed by the lip 32, and the compressed air in the air inlet 1 can enter the air channel connecting channel 13 through the gap between the support seat 26 and the

lips

32, 31.

In this embodiment, the valve further comprises an upper valve body 33, a second movable cavity is arranged in the upper valve body 33, the button valve core assembly 6 comprises a push rod assembly 34 and a switch valve 35, the push rod assembly 34 comprises a push rod 36, a guide ring 37 and a button control mechanism 38, the push rod assembly 34 is arranged in the second movable cavity, the lower end of the upper valve body 33 is provided with a lower valve body 39, a second exhaust port 8 is arranged on the lower valve body 39, a movable cavity is formed at the joint of the lower valve body 39 and the button valve seat 18, one end of the movable cavity is communicated with the second exhaust port 8, the other end of the movable cavity is communicated with the gas path connecting channel 13, the switch valve 35 is located in the movable cavity, the switch valve 35 is fixedly arranged at the lower end of the push rod 36 and slides up and down under the driving of the push rod 36, the valve moves up to cut off the communication between the gas path connecting channel 13 and the movable cavity, the valve moves down to cut off the communication between the second exhaust port 8 and the gas path connecting channel 13, the movable cavity is communicated with the air outlet 2.

In this embodiment, the first chamber 3 and the second chamber 4 are both disposed on the upper valve body 33, the first chamber 3 and the second chamber 4 are disposed in parallel, and the first chamber 3 and the second chamber 4 are communicated through the air passage connecting passage 13 formed in the upper valve body 33.

In this embodiment, the air path connecting channel 13 penetrates through the second chamber 4, the lower end face of the air path connecting channel 13 at the joint with the second chamber 4 is provided with a groove 40, the inner diameter of the groove 40 is larger than the inner diameter of the second chamber 4, the air path connecting channel further comprises a push rod return spring 41, the upper end of the push rod return spring 41 is abutted against the guide ring 37, and the lower end of the push rod return spring 41 is abutted against the bottom surface of the groove 40.

In this embodiment, the upper side and the lower side of the switch valve 35 are provided with the sealing rings 42, the sealing rings 42 have the same thickness and height, the cross section of each sealing ring 42 is triangular, and the switch valve 35 is in line contact with the top surface or the bottom surface of the movable cavity through the sealing rings 42 for sealing.

In this embodiment, the outer edge of the supporting seat 26 is provided with a limiting stop ring 43, the first exhaust port 7 is internally provided with a limiting step 45, and the limiting stop ring 43 can be abutted against the surface of the limiting step 45 through a sealing ring 44.

The working process of the manual valve is as follows:

when the handle of the manual valve is in a traveling position, air pressure is input from the air inlet 1, the first control valve core 15 pushes the uppermost end under the action of the air pressure, the first air inlet valve 9 is opened, the first air outlet valve 10 is closed, and the air pressure enters the movable cavity 61 through the air passage connecting channel 13. At this time, the button control mechanism is pressed to overcome the spring force of the return spring 41 of the push rod 36, push the push rod assembly 34 to move downwards, open the second air inlet valve 11, close the second air outlet valve 12, and at this time, the air pressure is output from the air outlet 2.

When the parking brake is applied, the control handle 28 is moved from the driving position to the parking position, the control valve core I15 moves downwards under the pushing action of the cam mechanism 29, the air inlet valve I9 is closed, the air outlet valve I10 is opened, and the air outlet valve I7 starts to exhaust air. When the pressure in the button valve cavity d is reduced to a set value, the upward spring force of the push rod return spring 41 is greater than the pressure in the movable cavity 61, the push rod 36 is pushed to automatically rebound upwards, the air inlet valve II 11 is closed, the air outlet valve II 12 is opened, the air pressure in the air outlet 2 is discharged from the air outlet opening II 8, and the air pressure in the air outlet 2 is reduced to 0, so that the parking brake of the vehicle is realized.

Under the condition, even if the operating handle returns to the driving state again under the action of external force, the first air inlet valve 9 is opened, air pressure reaches the second chamber 4 again through the air path connecting channel 13, at the moment, the vehicle is still in the parking state because the second air inlet valve 11 is in the closed state and no air pressure is output from the air outlet 2, and the safety of the parking state of the vehicle is ensured.

Example 2

The present embodiment discloses a manual valve assembly, the air outlet 2 is arranged on the lower valve body 39, and the switch valve 35 can not block the communication between the movable cavity and the air outlet 2 no matter the switch valve is in the position.

Example 3

This embodiment is different from embodiment 1 in that: the sealing ring 44 is in interference fit with the side wall of the limiting step 45, and the sealing ring 44 does not synchronously move along with the supporting seat 26.

Claims

1. The utility model provides a novel safe manual valve assembly which characterized in that: the manual valve is provided with an air inlet (1), an air outlet (2), a first chamber (3) for installing a manual valve control valve core assembly (5) and a second chamber (4) for installing a button valve control valve core assembly (6), the air inlet (1) is communicated with the first chamber (3), the air outlet (2) is communicated with the second chamber (4), and the first chamber (3) is connected with the second chamber (4) through an air path connecting channel (13) arranged in the valve body; the first chamber (3) is connected with a first exhaust port (7), the second chamber (4) is communicated with a second exhaust port (8), a first air inlet valve (9) and a first exhaust valve (10) are arranged in the manual control valve core assembly (5), and a second air inlet valve and a second exhaust valve are arranged in the button valve core assembly (6);

the air inlet (1) is connected to a first air inlet valve (9) through an internal air path, the first air inlet valve (9) controls the connection or disconnection of the air inlet (1) and the air path connecting channel (13), and the first air outlet valve (10) controls the connection or disconnection of the air path connecting channel (13) and the air outlet; the second air inlet valve controls the communication between the air passage connecting passage (13) and the air outlet (2), and the second air outlet valve controls the communication or disconnection between the air outlet (2) and the second air outlet (8);

when the automobile is in a driving state, air pressure is input from the air inlet (1) to the control valve core assembly, the air inlet valve I (9) is moved upwards to be opened, the air exhaust valve is in a closed state, the air pressure enters the air path connecting channel (13) through the air inlet valve I (9), the air inlet valve II (11) is opened under the action of the air pressure, the air exhaust valve II (12) is closed, and the air pressure is output from the air outlet (2);

when parking braking is implemented, the manual control valve core assembly (5) moves downwards, the air inlet valve I (9) is closed, the air exhaust valve I (10) is opened, compressed air of the air path connecting channel (13), compressed air between the air path connecting channel (13) and the air outlet (2) are exhausted through the air outlet I (7), air pressure is reduced, the button valve control valve core assembly (6) returns to the position where the air inlet valve II (11) is closed, the air exhaust valve II (12) is opened, and the air outlet (2) is communicated with the air outlet II (8).

2. The novel safety manual valve assembly of claim 1, wherein: the manual valve control valve core assembly (5) comprises a first control valve core (15) and a first return spring (16), the first control valve core (15) comprises a valve seat (18), the valve seat (18) comprises a first valve cavity (19), a valve rod assembly (20) is assembled in the first valve cavity (19), the valve rod assembly (20) comprises a first valve rod (21) and a second valve rod (22) inserted in the first valve rod (21), and the second valve rod (22) can slide along the axial direction of the first valve rod (21); the lower end of the valve seat (18) is provided with a valve assembly (23), the valve assembly (23) can slide along the valve seat (18), the valve assembly further comprises a piston spring (24), the upper end of the piston spring (24) acts on the lower end of the first valve cavity (21), the lower end of the piston spring (24) acts on the valve assembly (23), the lower end face of the valve assembly (23) and the lower end of the first valve cavity (19) form a first air inlet valve port (31) and a first air inlet valve port (25), the valve assembly further comprises a supporting seat (26), the middle of the supporting seat (26) is provided with an air passage communicated with the first air outlet (7), the lower end of the first return spring (16) acts on the inner side of the air outlet, the other end of the return spring acts on the supporting seat (26), the edge part of the upper end of the supporting seat (26) and the lower end of the valve assembly (23) form a first air outlet valve (10), and the upper end of the supporting seat (26) abuts against the lower end of the second valve cavity (22); when the automobile is in a traveling state, the upper end edge of the supporting seat (26) is abutted against the valve assembly (23), the exhaust valve I (10) is in a closed state, an idle stroke cavity (27) is formed between the upper end of the valve rod II (22) and a sliding cavity for sliding the valve rod II (22) in the valve rod I (21), and the valve rod I (21) can apply acting force to the valve rod II (22) by firstly sliding to overcome the stroke of the idle stroke cavity (27); when the first valve rod (21) moves downwards to push the valve assembly (23) to abut against the lower end of the first valve cavity (19), the first air inlet valve (9) is closed, the first valve rod (21) continues to move downwards, the piston spring (24) deforms and contracts, the first valve rod (21) drives the second valve rod (22) to move downwards to push the support seat (26) to move downwards, the support seat (26) overcomes the acting force of the first return spring (16) to be separated from the contact with the first valve assembly (23), and the first air outlet valve (10) is opened.

3. The novel safety manual valve assembly of claim 2, wherein: the valve rod I-shaped structure is characterized by further comprising a handle assembly (28), the lower end of the handle assembly (28) comprises a cam assembly (29), the cam assembly (29) is abutted to the upper end of the valve rod I (21), the cam assembly (29) rotates to drive the valve rod I (21) to move in the vertical direction, a balance spring (30) is arranged in the valve seat (18), and the balance spring (30) is supported between the cam assembly (29) and the valve seat (18).

4. A novel safety manual valve assembly according to claim 2, wherein: the lower end of the first valve cavity (19) is provided with a valve port (31), the inner side of the valve port (31) is provided with a raised lip (32) along the edge, the lip (32) and the bottom surface of the first valve cavity (19) are arranged in an obtuse angle, the outer diameter of the supporting seat (26) is smaller than the aperture formed by the lip (32), and compressed air in the air inlet (1) can enter the air path connecting channel (13) through the gap between the supporting seat (26) and the lips (32) and the valve port (31).

5. The novel safety manual valve assembly of claim 2, wherein: the valve further comprises an upper valve body (33), the second cavity (4) is arranged in the upper valve body (33), the button valve control core assembly (6) comprises a push rod assembly (34) and a switch valve (35), the push rod assembly (34) comprises a push rod (36), a guide ring (37) and a button control mechanism (38), the push rod assembly (34) is arranged in the second cavity (4), the lower end of the upper valve body (33) is provided with a lower valve body (39), the exhaust port II (8) is arranged on the lower valve body (39), a movable cavity is formed at the joint of the lower valve body (39) and the button valve seat (18), one end of the movable cavity is communicated with the exhaust port II (8), the other end of the movable cavity is communicated with the air passage (13), the switch valve (35) is located in the movable cavity, the switch valve (35) is fixedly arranged at the lower end of the push rod (36) and slides up and down under the driving of the push rod (36), the valve moves upwards to cut off the communication between the air passage connecting channel (13) and the movable cavity, the valve moves downwards to abut against the air inlet end of the air outlet II (8) to cut off the communication between the air outlet II (8) and the air passage connecting channel (13), and the movable cavity is communicated with the air outlet (2).

6. The novel safety manual valve assembly of claim 5, wherein: first cavity (3) and second cavity (4) all set up on last valve body (33), first cavity (3) and second cavity (4) parallel arrangement, and gas circuit connecting channel (13) intercommunication of seting up in first cavity (3) and second cavity (4) through last valve body (33).

7. The novel safety manual valve assembly of claim 5, wherein: the gas circuit connecting channel (13) penetrates through the second chamber (4), a groove (40) is formed in the lower end face of the joint of the gas circuit connecting channel (13) and the second chamber (4), the inner diameter of the groove (40) is larger than that of the second chamber (4), the gas circuit connecting channel further comprises a push rod return spring (41), the upper end of the push rod return spring (41) is abutted to the guide ring (37), and the lower end of the push rod return spring (41) is abutted to the bottom face of the groove (40).

8. The novel safety manual valve assembly of claim 5, wherein: the upper side face and the lower side face of the switch valve (35) are provided with sealing rings (42), the sealing rings (42) on each side face of the switch valve (35) are at least 2 circles, the heights of the sealing rings (42) are the same, the cross sections of the sealing rings (42) are triangular, and the switch valve (35) is in line contact sealing with the top face or the bottom face of the movable cavity through the sealing rings (42).

9. The novel safety manual valve assembly of claim 2, wherein: the outer edge of the supporting seat (26) is provided with a limiting stop ring (43), a limiting step (45) is arranged inside the exhaust port I (7), the limiting stop ring (43) is connected with a sealing ring (44), and the limiting stop ring (43) can abut against the surface of the limiting step (45) through the sealing ring (44).