Sealing structure of valve

Abstract

The utility model discloses a valve sealing structure which comprises a valve element arranged in a valve body and a sealing ring embedded in the valve body, one end face, capable of abutting against the sealing ring, of the valve element is a sealing end face, the other end face of the valve element abuts against a reset spring, and a sealing ring limiting structure is arranged in the valve body. The sealing ring limiting structure abuts against the valve body plane where the sealing ring is located, the section angle of the sealing ring surrounded by the sealing ring limiting structure and the valve body plane where the sealing ring is located is larger than 180 degrees but smaller than 360 degrees, the valve element is located in the sealing ring limiting structure, and the sealing end face of the valve element is provided with a sealing protruding part capable of abutting against the sealing ring. According to the arrangement mode of the sealing structure, the water valve can be opened under the condition of short stroke of the valve element, and the sealing ring can bear high pressure and is suitable for a handheld water sprayer provided with a pressing type switch.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid injection equipment, concretely relates to a sealing structure of valve. BACKGROUND

[0002] The handheld water sprayer at least includes a housing, a water valve arranged in the housing, and a water valve switch matched with the water valve. The water valve includes a valve body and a valve core. The valve core is moved to connect the water inlet channel and the water outlet channel of the valve body, and the water valve is in an open state. The valve core is reset to block the water inlet channel and the water outlet channel of the valve body, and the water valve is in a closed state. In order to make the valve core block tightly, a sealing ring is arranged between the valve core and the valve body.

[0003] The sealing ring is generally embedded between the outer wall of the valve core and the inner wall of the valve body. The arrangement mode of the sealing ring is different due to different water pressures flowing through the water valve. If the water pressure flowing through the water valve is high, a flow channel is formed on the valve core. When the valve core is displaced to open the water valve, the flow channel passes through the sealing ring and enters a high-pressure area to be connected with the water inlet channel and the water outlet channel of the valve body. In order to prevent the water flow from washing away the sealing valve, the sealing ring cannot leave the gap formed between the valve core and the valve body when the valve core is displaced to open the water valve. Otherwise, the high-pressure water may displace the sealing ring on the inner wall of the valve body or the outer wall of the valve core, resulting in sealing failure. When the valve core is reset to close the water valve, the flow channel passes through the sealing ring and enters a low-pressure area, and the sealing ring cuts off the connection between the flow channel and the water inlet channel and the water outlet channel of the valve body. In this way, the valve core needs a longer length to still limit the sealing ring between the outer wall of the valve core and the inner wall of the valve body when the valve core is displaced to open the water valve, and the valve core needs a longer stroke to open the water valve.

[0004] If the water pressure flowing through the water valve is low, the valve core can completely separate from the sealing ring installed on the valve body when the valve core is displaced to open the water valve, or the sealing ring installed on the valve core can completely separate from the valve body, and the sealing ring does not need to be kept between the valve core and the valve body. In this way, the valve core does not need a longer length, and the valve core does not need a longer stroke to open the water valve. For example, the end of the valve core is conical, the sealing ring is embedded on the conical side wall, the end of the water outlet channel of the valve body is a horn mouth, the conical end of the valve core is fitted in the horn mouth of the water outlet channel of the valve body when the valve core closes the water valve, and the sealing ring plays a sealing role; when the water valve is opened, the valve core is displaced and away from the horn mouth.

[0005] The water valve switch matched with the handheld water sprayer is generally a press switch, the stroke of the valve core driven by the press switch is short, but the handheld water sprayer includes a high-pressure cleaning machine, and the sealing ring of the water valve needs to withstand high pressure. The arrangement mode of the sealing ring in the prior art is difficult to adapt to the handheld high-pressure water sprayer. SUMMARY

[0006] The utility model discloses a handheld water sprayer, a matched press switch, the stroke of the drive water valve core is shorter, but the sealing ring of water valve needs to bear high pressure, and the setting mode of the sealing ring in the prior art is difficult to apply.

[0007] To solve the above technical problems, the utility model provides the following technical scheme: a sealing structure of a valve, including the valve core that sets in the valve body, the sealing ring that embeds on the valve body, the end face of valve core can be opposite with sealing ring is the sealed end face, the other end face of valve core is opposite with reset spring, the sealing ring limiting structure is located in the valve body, the sealing ring limiting structure is opposite with the valve body plane where sealing ring is located, the section angle that the sealing ring limiting structure and the valve body plane where sealing ring is located enclose sealing ring is greater than 180 degrees but less than 360 degrees, the valve core is located in the sealing ring limiting structure, and the sealed end face of valve core is equipped with the sealing convex part that can be opposite with sealing ring.

[0008] The valve core sets in the link of the water inlet channel and the water outlet channel of the valve body, and the valve core advances under the elastic force of the reset spring, the sealing convex part on the sealed end face is opposite with the sealing ring, the water outlet channel of the valve body is blocked, the water inlet channel and the water outlet channel of the valve body are cut off, and the water valve is closed.Press switch acts on the piston rod, and the piston rod drives the valve core, and the valve core retreats, and the reset spring is compressed, and the valve core is away from the sealing ring, i.e.can open the water outlet channel of the valve body, so that the water valve is in the open state, and thus, the valve core stroke needed for the water valve opening is short, and the handheld water sprayer with the press switch is suitable.

[0009] The sealing ring of the utility model is limited by the sealing ring limiting structure in addition to the location of the valve body plane where the sealing ring is located, so that the section angle that the sealing ring is enclosed is greater than 180 degrees but less than 360 degrees, so that the sealing ring can resist high-pressure water from the water inlet channel without displacement, and the sealing effect of the water valve is guaranteed.

[0010] The setting mode of the sealing structure of the utility model makes the valve core open the water valve in the case of short stroke, and the sealing ring can bear high pressure, and the handheld water sprayer with the press switch is suitable.

[0011] The valve body plane where the sealing ring is located is provided with the sealing ring positioning recess, and the sealing ring positioning recess half-encloses the sealing ring.The sealing ring positioning recess plays a main positioning role on the sealing ring, and the angle that the sealing ring positioning recess encloses the sealing ring is greater than the angle that the sealing ring limiting structure encloses the sealing ring from the section.The part of the sealing ring that is not enclosed can be opposite with the sealing convex part of the valve core.

[0012] The sealing ring positioning groove is located on the inner ring part of the sealing ring and protrudes towards the spool direction. The sealing ring and the sealing ring positioning groove located on the inner ring part of the sealing ring have a wedge angle. Even if the sealing ring is slightly displaced by high-pressure water, the protruding sealing ring positioning groove located on the inner ring part of the sealing ring can block the sealing ring to prevent it from further separating from the sealing ring positioning groove.

[0013] The sealing ring limiting structure is provided with an arc-shaped sealing ring positioning structure matched with the outer ring of the sealing ring. Specifically, the sealing ring positioning structure is matched with the side of the outer ring of the sealing ring close to the spool.

[0014] The sealing ring limiting structure is integrally formed on the spool sleeve, the spool sleeve is matched in the valve body, one end of the spool sleeve provided with the sealing ring limiting structure is open, the spool and the return spring are arranged in the spool sleeve, and the end of the return spring away from the spool is abutted against the other end of the spool sleeve closed. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further explained in connection with the drawings:

[0016] Figure 1 It is the schematic view of handheld water sprayer;

[0017] Figure 2 It is the partial sectional view of handheld water sprayer;

[0018] Figure 3 It is Figure 2 The partial enlarged view of

[0019] Figure 4 It is Figure 3 The enlarged view of A in

[0020] Figure 5 It is the schematic view of valve body 10 and water pipeline 61;

[0021] Figure 6 It is Figure 5 The schematic view of valve body 10 and water pipeline 61 from left side in

[0022] Figure 7 It is Figure 6 The partial enlarged view of

[0023] Figure 8 It is the schematic view of spool sleeve 40.

[0024] Explanation of symbols in the drawings:

[0025] 10, valve body; 11, sealing ring positioning groove; 12, sealing ring positioning groove located on the inner ring part of the sealing ring; 13, water inlet; 14, water outlet; 15, hinged shaft; 16, positioning convex part accommodation structure; 17, positioning convex part clamping groove; 18, mounting port;

[0026] 20. Valve core; 21. Return spring; 22. Sealing protrusion; 23. Piston rod;

[0027] 30. Sealing ring;

[0028] 40. Valve core sleeve; 41. Sealing ring limiting structure; 42. Sealing ring positioning structure; 43. Positioning protrusion; 44. Groove for installing the sealing ring;

[0029] 50. Push-button switch; 51. Push-button part; 52. Second spring seat;

[0030] 60. Housing; 61. Water pipe; 62. First spring seat. Detailed Implementation

[0031] Combination Figure 3 , Figure 4 A valve sealing structure includes a valve core 20 disposed in a valve body 10 and a sealing ring 30 embedded in the valve body. One end face of the valve core that abuts against the sealing ring is a sealing end face, and the other end face of the valve core abuts against a return spring 21. A sealing ring limiting structure 41 is provided in the valve body, and the sealing ring limiting structure abuts against the plane of the valve body where the sealing ring is located. Figure 4 As shown, the angle between the sealing ring limiting structure and the valve body plane where the sealing ring is located surrounding the sealing ring is greater than 180 degrees but less than 360 degrees. The valve core 20 is located in the sealing ring limiting structure, and the sealing end face of the valve core is provided with a sealing protrusion 22 that can abut against the sealing ring.

[0032] The valve core 20 is located at the junction of the inlet channel 13 and the outlet channel 14 of the valve body. The valve core is connected to the piston rod 23, which protrudes outward from the valve body 10 and abuts against the pressing part 51 of the push-button switch 50. The lower part of the push-button switch 50 is hinged to the valve body 10 via a hinge shaft 15, and the top of the push-button switch is abutted by the housing 60 or the part containing the spray nozzle inside the housing. The part containing the spray nozzle is connected to the water pipe 61, which is connected to the valve body 10, or the water pipe 61 is integrally formed with the valve body 10. A first spring seat 62 is provided at the junction of the water pipe 61 and the valve body 10, and a second spring seat 52 is provided on the inner side of the push-button switch 50. A return spring for the push-button switch (not shown in the attached figure) is located between the first spring seat and the second spring seat.

[0033] like Figure 4 The valve body plane where the sealing ring is located is provided with a sealing ring positioning groove 11, which partially surrounds the sealing ring 30.

[0034] like Figure 4 The sealing ring positioning groove is located on the inner ring portion 12 of the sealing ring and protrudes towards the valve core.

[0035] likeFigure 4 The sealing ring limiting structure 41 is provided with an arc-shaped sealing ring positioning structure 42, which cooperates with the outer ring of the sealing ring 30.

[0036] Combination Figure 3 , Figures 5 to 8 The sealing ring limiting structure 41 is integrally formed on the valve core sleeve 40, which fits inside the valve body 10. One end of the valve core sleeve has the sealing ring limiting structure open, and the valve core 20 and return spring 21 are disposed within the valve core sleeve. The tail of the valve body 10 has an installation port 18, and the side wall of the installation port has a positioning protrusion relief structure 16 and a positioning protrusion locking groove 17. The positioning protrusion locking groove and the positioning protrusion relief structure are offset from each other. Before installing the valve core sleeve 40, the sealing ring 30 is assembled into the sealing ring positioning groove 11 through the installation port. After the piston rod 23 mates with the valve core 20, it is then assembled into the valve core sleeve 40 along with the return spring 21. Finally, the valve core sleeve 40 is installed into the installation port. A positioning protrusion 43 is provided on the valve core sleeve 40. After passing through the positioning protrusion relief structure 16, the positioning protrusion enters the mounting port axially. Then, the positioning sleeve 40 is rotated at a certain angle so that the positioning protrusion 43 engages with the positioning protrusion locking groove 17. At this time, the sealing ring positioning structure 42 at the front end of the valve core sleeve 40 cooperates with the sealing ring 30, and the piston rod 23 protrudes forward from the valve body 10.

[0037] refer to Figure 3 , Figure 4 The valve core 20 advances under the elastic force of the return spring 21, and the sealing protrusion 22 on the sealing end face abuts against the sealing ring 30, blocking the water outlet 14 of the valve body 10 and cutting off the water inlet 13 and outlet of the valve body, thus closing the water valve. The push-button switch 50 acts on the front end of the piston rod 23, which drives the valve core 20 to retract, compressing the return spring 21. The valve core 20 moves away from the sealing ring 30, thereby opening the water outlet 14 of the valve body and putting the water valve in the open state. In this way, the valve core stroke required to open the water valve is short, making it suitable for handheld water sprayers equipped with push-button switches.

[0038] In addition to being positioned by the sealing ring positioning groove 11, the sealing ring 30 is also limited by the sealing ring positioning structure 42, so that the cross-sectional angle of the sealing ring 30 is greater than 180 degrees but less than 360 degrees. In this way, the sealing ring 30 can withstand the high pressure water from the water inlet 13 without shifting, thus ensuring the sealing effect of the water valve.

[0039] The portion of the sealing ring 30 that is not enclosed can abut against the sealing protrusion 22 of the valve core.

[0040] like Figure 4As shown, the sealing ring 30 and the sealing ring positioning groove located between the inner ring part 12 of the sealing ring have a wedge angle. Even if the sealing ring 30 is slightly displaced by high-pressure water, the protruding sealing ring positioning groove located between the inner ring part 12 of the sealing ring can block the sealing ring 30, avoiding its further disengagement from the sealing ring positioning groove 11.

[0041] The above merely describes the preferred embodiments of the present application, and for those skilled in the art, the specific implementation manners and application scopes can be changed according to the idea of the present application, and the content of the description should not be understood as a limitation of the present application.

Claims

1. A sealing structure for a valve, comprising a valve core (20) disposed in a valve body (10) and a sealing ring (30) embedded in the valve body, wherein one end face of the valve core that abuts against the sealing ring is a sealing end face, and the other end face of the valve core abuts against a return spring (21), characterized in that: The valve body is provided with a sealing ring limiting structure (41), the sealing ring limiting structure is in abutment with the valve body plane where the sealing ring is located, the cross section angle of the sealing ring limiting structure and the valve body plane where the sealing ring is located is greater than 180 degrees but less than 360 degrees, the valve core (20) is located in the sealing ring limiting structure, and the sealing end surface of the valve core is provided with a sealing convex part (22) capable of abutting against the sealing ring.

2. A seal structure for a valve as claimed in claim 1, characterised in that: The valve body plane where the sealing ring is located is provided with a sealing ring positioning groove (11) which semi-surrounds the sealing ring (30).

3. A seal for a valve according to claim 2, wherein: The sealing ring positioning groove is located at the inner ring part (12) of the sealing ring and protrudes towards the valve core.

4. The valve seal structure of claim 1, wherein: The sealing ring limiting structure (41) is provided with an arc-shaped sealing ring positioning structure (42) which cooperates with the outer ring of the sealing ring (30).

5. The valve seal structure of claim 1 wherein: The sealing ring limiting structure (41) is integrally formed on the valve core sleeve (40), the valve core sleeve is fitted in the valve body (10), one end of the valve core sleeve provided with the sealing ring limiting structure is open, and the valve core (20) and the return spring (21) are arranged in the valve core sleeve.

Images