Press type quick-opening valve and valve core device

Abstract

According to the push type quick-opening valve and the valve element device, a front sealing structure is arranged in front of a water outlet in a valve element main body cylinder, a rear sealing structure is arranged behind the water outlet, when a switch is closed, the push type quick-opening valve moves forwards to be in sealing fit with the front sealing structure and is also in sealing fit with the rear sealing structure, and when a valve element is opened, the push type quick-opening valve moves forwards to be in sealing fit with the rear sealing structure. The rear sealing structure moves backwards to be separated from the front sealing structure in a sealing manner and is still in sealing fit with the rear sealing structure; the valve element main body cylinder is provided with a valve element rear end retreating cavity behind the rear sealing structure, the rear sealing structure is located between the valve element rear end retreating cavity and the water outlet, the valve element is a cylinder body provided with a through hole and is communicated with the water inlet and the valve element rear end retreating cavity, and when the valve element is closed, the water inlet is still communicated with the valve element rear end retreating cavity. The overall length can be greatly shortened, the applied valve can be made to be very small, the valve element can be rapidly opened, the valve element rod can be manufactured as an integrated structure, the precision is guaranteed, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to a push-type quick-opening valve and a valve core device. Background Art

[0002] The push-type valve core structure often uses a valve core connected to the end of the valve core rod of a push-type switch. The push-type switch is equipped with a button, which is connected to the valve core rod. The motion control structure in the push-type switch can provide two front and rear stop positions for the valve core rod in the axial direction, so that the valve core can also have two stop positions, corresponding to the open and closed states of the valve respectively.

[0003] For example, the valve core structure disclosed in the Chinese patent document with publication number 214222062U can be applied to the above-mentioned dual-state control valve. The interior of the valve core can form a working environment with water pressure at the front and back, and the pressing operation is relatively easy. The valve core of this structure is relatively long, and its application in certain use occasions will be limited. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a push-type quick-opening valve and a valve core device, which are short in length and open quickly.

[0005] According to the first aspect of the present invention, the present invention adopts the following technical solution:

[0006] A push-type quick-opening valve core device comprises a push-type switch and a valve core assembly, wherein the valve core assembly comprises a valve core main body tube and a valve core, wherein the axial front end of the valve core main body tube is a water inlet, and a water outlet is arranged on the front side wall of the valve core main body tube, and a valve core rod capable of axial forward and backward movement is arranged on the central axis in the valve core main body tube, and the valve core rod is connected to the push-type switch, and the push-type switch controls the movement of the valve core rod, and the valve core is connected to the front end of the valve core rod; it is characterized in that a front sealing structure is arranged in front of the water outlet in the valve core main body tube, and a rear sealing structure is arranged behind the water outlet, and the movement stroke of the valve core satisfies: when the switch is closed, it moves forward to seal with the front sealing structure, and also seals with the rear sealing structure; when the valve core is opened, it moves backward to seal and disengage from the front sealing structure, and also still seals with the rear sealing structure;

[0007] The valve core main body cylinder is provided with a valve core rear end retreat cavity behind the rear sealing structure, and the rear sealing structure is located between the valve core rear end retreat cavity and the water outlet. The valve core is a cylinder with a through hole, and the water inlet and the valve core rear end retreat cavity are connected. When the valve core is closed, the water inlet and the valve core rear end retreat cavity are still connected.

[0008] On the basis of adopting the above technical solution of the present invention, the present invention may also adopt the following further technical solution, or use these further technical solutions in combination:

[0009] The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backwards, and a diversion slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a diversion water outlet channel is formed between the diversion slope and the bowl-shaped sealing ring.

[0010] The rear sealing structure adopts a bowl-shaped sealing ring with an opening forward, and a rear end inclined surface is arranged at the rear end of the valve core to cooperate with the sealing lip of the bowl-shaped sealing ring with an opening forward. When the switch is closed, the sealing lip is pressed on the rear end inclined surface by the water pressure of the rear end retreat cavity of the valve core.

[0011] The valve core rod has a length sufficient to extend backward to the interior of the push-type switch.

[0012] The upper part of the valve core rod constitutes the sliding shaft of the switch located inside its fixed seat and is connected to the control structure in the switch, or the upper part of the valve core rod is inserted into the connecting hole of the rotating gear sleeve in the switch.

[0013] A groove matching with the rear end of the valve core cylinder is arranged on the rear end cavity wall of the valve core rear end retreat cavity, and when the valve core retreats, its rear end retreats into the groove.

[0014] The valve core assembly also includes a fixing frame and a pressure ring. The outer diameter of the fixing frame is adapted to the inner diameter of the valve core main body tube and can just be inserted into the valve core main body tube from the front end. A limiting step is arranged inside the valve core main body tube. The rear sealing structure, the fixing frame and the front sealing assembly are sequentially inserted from the front port of the valve core main body tube and limited by the limiting step, and then are tightened with a pressure ring. The pressure ring is connected to the valve core main body tube.

[0015] The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backward, and a guide slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a guide water outlet channel is formed between the guide slope and the bowl-shaped sealing ring; for the bowl-shaped sealing ring of the front sealing structure, a circle of front limit steps matching the shape of the bowl-shaped sealing ring is arranged at the front end of the fixing frame; and a rubber gasket is arranged between the bowl-shaped sealing ring and the front limit step, and the rubber gasket also has a bevel protruding from the inner side of the fixing frame, and the bevel is padded on the bevel of the bowl-shaped sealing ring, leaving the sealing lip of the bowl-shaped sealing ring as a free end.

[0016] According to the second aspect of the present invention, the present invention adopts the following technical solution:

[0017] A push-type quick-opening valve comprises a housing, a push-type switch and a valve core assembly, wherein the valve core assembly comprises a valve core, the axial front port of the housing is a water inlet, the front side wall of the housing is provided with a water outlet, and a valve core rod capable of axial forward and backward movement is provided on the central axis in the housing, the valve core rod is connected with the push-type switch, the push-type switch controls the movement of the valve core rod, and the valve core is connected to the front end of the valve core rod; it is characterized in that a front sealing structure is provided in front of the water outlet in the housing, and a rear sealing structure is provided behind the water outlet, and the movement stroke of the valve core satisfies: when the switch is closed, the valve core moves forward to seal with the front sealing structure, and also seals with the rear sealing structure; when the valve core is opened, the valve core moves backward to be disengaged from the front sealing structure, and also still seals with the rear sealing structure;

[0018] The shell is provided with a valve core rear end retreat cavity behind the rear sealing structure, and the rear sealing structure is located between the valve core rear end retreat cavity and the water outlet. The valve core is a cylinder with a through hole, and the water inlet and the valve core rear end retreat cavity are connected. When the valve core is closed, the water inlet and the valve core rear end retreat cavity are still connected.

[0019] On the basis of adopting the above technical solution of the present invention, the present invention may also adopt the following further technical solution, or use these further technical solutions in combination:

[0020] The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backwards, and a diversion slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a diversion water outlet channel is formed between the diversion slope and the bowl-shaped sealing ring.

[0021] The rear sealing structure adopts a bowl-shaped sealing ring with an opening forward, and a rear end inclined surface is arranged at the rear end of the valve core to cooperate with the sealing lip of the bowl-shaped sealing ring with an opening forward. When the switch is closed, the sealing lip is pressed on the rear end inclined surface by the water pressure of the rear end retreat cavity of the valve core.

[0022] The valve core rod has a length sufficient to extend backward to the interior of the push-type switch.

[0023] The upper part of the valve core rod constitutes the sliding shaft of the switch located inside its fixed seat and is connected to the control structure in the switch, or the upper part of the valve core rod is inserted into the connecting hole of the rotating gear sleeve in the switch.

[0024] A groove matching with the rear end of the valve core cylinder is arranged on the rear end cavity wall of the valve core rear end retreat cavity, and when the valve core retreats, its rear end retreats into the groove.

[0025] The valve core assembly also includes a fixing frame and a pressure ring. The outer diameter of the fixing frame is adapted to the inner diameter of the shell and can just be inserted into the valve core main body tube from the front end. A limiting step is set inside the shell. The rear sealing structure, the fixing frame and the front sealing assembly are sequentially inserted from the front port of the shell and limited by the limiting step, and then pressed by the pressure ring. The pressure ring is connected to the shell.

[0026] The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backward, and a guide slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a guide water outlet channel is formed between its guide slope and the bowl-shaped sealing ring; for the bowl-shaped sealing ring of the front sealing structure, a circle of front limit steps matching the shape of the bowl-shaped sealing ring is arranged at the front end of the fixing frame; and a rubber gasket is arranged between the bowl-shaped sealing ring and the front limit step, and the rubber gasket also has a bevel protruding from the inner side of the fixing frame, and the bevel is padded on the bevel of the bowl-shaped sealing ring, leaving the sealing lip of the bowl-shaped sealing ring as a free end.

[0027] Due to the adoption of the technical solution of the present invention, the present invention sets the rear sealing structure to be normally closed, water enters from the front end, and flows out directly from the gap between the valve core and the front sealing structure. It is closed when pressed down and opened when it bounces up, which can greatly shorten the overall length, facilitate the design of the matching valve, make the applied valve very small, and quickly open the valve core. The present invention can make the length only about 4.3cm, and the valve core rod can be manufactured as an integrated structure, which not only ensures accuracy but also reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of the valve core device embodiment of the present invention when it is in a closed state.

[0029] Figure 2 It is a cross-sectional view of the valve core device embodiment of the present invention when it is in an open state.

[0030] Figure 3 It is an exploded schematic diagram of an embodiment of the valve core device of the present invention. DETAILED DESCRIPTION

[0031] Referring to the accompanying drawings, the push-type quick-opening valve core device provided by the present invention comprises a push-type switch and a valve core assembly.

[0032] The valve core assembly includes a valve core main body tube 6 and a valve core 12, the axial front end of the valve core main body tube 6 is a water inlet 61, and the front side wall of the valve core main body tube 6 is provided with a water outlet 62. Inside the valve core main body tube 6, a valve core rod 4 capable of axially moving forward and backward is provided on the central axis, and the valve core rod 4 is connected to the push-type switch, and the push-type switch controls the movement of the valve core rod. The valve core 12 is connected to the lower end of the valve core rod 4, and moves straight up and down (or linearly in the forward and backward directions) in the valve core main body tube 6 under the drive of the switch.

[0033] A front sealing structure is arranged in front of the water outlet 62 in the valve core main body tube 6, and a rear sealing structure is arranged behind the water outlet 62. The movement stroke of the valve core 12 satisfies: when the switch is closed, it moves forward to seal with the front sealing structure, and also seals with the rear sealing structure. When the valve core is opened, it moves backward to seal and disengage from the front sealing structure, and still seals with the rear sealing structure. The rear sealing structure is normally closed. In the present invention, the product is closed when it is pressed down, and is opened when it bounces up. The spring force + water buoyancy can be used to make the switch rebound, which can reduce the spring force and make the spring softer.

[0034] In the present invention, the rear sealing structure is set to be normally closed. Water enters from the front end and flows out directly from the gap between the valve core 12 and the front sealing structure. It does not need to reach the rear first and then flow forward. The water inlet channel is shortened, and there is no need to set up a water inlet front chamber with a certain length separately. The valve core main body tube 6 only needs to be composed of a cylinder.

[0035] The valve core main body cylinder 6 is provided with a valve core rear end retreat cavity 63 behind the rear sealing structure, and the rear sealing structure is located between the valve core rear end retreat cavity 63 and the water outlet 62. The valve core 12 is a cylinder with a through hole, and the water inlet 61 and the valve core rear end retreat cavity 63 are connected in the valve cavity. When the valve core is closed, the water inlet 61 and the valve core rear end retreat cavity 63 are still connected. The cylinder of the valve core 12 can be connected to the valve core rod 4 through a plurality of spokes 123.

[0036] In the present invention, the front sealing structure adopts a bowl-shaped sealing ring 14 with an opening facing backward, and a guide slope 121 is arranged around the front end of the valve core. When the valve core is opened, the valve core 12 is disengaged from the bowl-shaped sealing ring 14, and a guide water outlet channel is formed between the guide slope 121 and the bowl-shaped sealing ring 12, so that the water flow can flow directly from the water inlet 61 to the lateral water outlet 62 on the side in a good flow state. The valve core assembly also includes a fixing frame 11 and a pressing ring 15. The outer diameter of the fixing frame 11 is adapted to the inner diameter of the valve core main body tube 6 and can just be placed in the valve core main body tube 6 from the front end. A limiting step 67 is arranged inside the valve core main body tube 6. The rear sealing structure, the fixing frame 11 and the front sealing assembly are sequentially placed from the front end of the valve core main body tube 6 and limited by the limiting step 67, and then pressed by the pressing ring 15. The pressing ring 15 and the valve core main body tube 6 are clamped, and the installation connection is very convenient and reliable. The axial length of the pressing ring 15 only needs to meet its own strength without other requirements.

[0037] The rear sealing structure adopts a bowl-shaped sealing ring 10 with an opening facing forward, and a rear end inclined surface 122 is arranged at the rear end of the valve core to cooperate with the sealing lip 101 of the bowl-shaped sealing ring 10 with an opening facing forward. When the switch is closed, the sealing lip 101 is pressed on the rear end inclined surface 122 by the water pressure of the rear end retreat chamber 63 of the valve core. For the present invention in which the rear sealing structure is set to be normally closed, not only is the resistance smaller when the valve core retreats, the opening is fast, and the sealing effect is good.

[0038] For the bowl-shaped sealing ring 10, a circle of rear limit steps 111 matching the shape of the bowl-shaped sealing ring 10 is provided at the rear end of the fixing frame 11. For the bowl-shaped sealing ring 14, a circle of front limit steps 112 matching the shape of the bowl-shaped sealing ring 14 is provided at the front end of the fixing frame 11. In addition, a rubber gasket 13 is provided between the bowl-shaped sealing ring 14 and the front limit steps 112. The rubber gasket 13 also has a bevel 131 protruding from the inner side of the fixing frame 11. The bevel 131 is cushioned on the bevel of the bowl-shaped sealing ring 14, leaving the sealing lip 141 of the bowl-shaped sealing ring 14 as a free end.

[0039] With the sealing structure of the present invention, the inner sealing surface is designed as a flexible structure, which cooperates more smoothly with the matching sealing parts, fits tightly, has a better sealing effect, and feels softer. The bevel 131 of the rubber gasket 13 is used as the support and guide surface of the bowl-shaped sealing ring 14, so that the flow between the water inlet 61 and the water outlet 62 is better.

[0040] A groove 64 matching the rear end of the valve core cylinder is provided on the rear end cavity wall of the valve core rear end retreat cavity 63. When the valve core cylinder wall retreats, its rear end retreats into the groove 64, which helps to protect the valve core structure in the open state and also shortens the overall length of the valve core structure.

[0041] In the present invention, the length of the valve core rod 4 can extend backwards to the inside of the push-type switch. In the past, in the valve core device, the valve core rod and the transmission rod or control component in the push-type switch were separate structures. The solution of the present invention can make them an integrated structure, further reducing the cost. In practice, the upper part of the valve core rod 4 can constitute the sliding shaft of the push-type switch located inside its fixed seat, and is connected to the control structure in the push-type switch (such as a cam, or an elastic hook connected to the cam). Or, as in this embodiment, the upper part 41 of the valve core rod 4 is inserted into the connecting hole 31 of the rotating gear sleeve 3 in the push-type switch. Figure 2 is a linear sliding gear sleeve connected to the rotating rack 3, and figure 1 is a housing of the push-type switch. The housing 1 is located behind the valve core main body tube 6 and is clamped or threaded therewith.

[0042] A rear sealing element mounting seat 65 which protrudes backward and opens forward is arranged in the middle of the rear end cavity wall of the rear end retreat cavity 63 of the valve core, and a center hole 66 is arranged at the bottom of the rear sealing element mounting seat 65 for the valve core rod 4 to pass through; a valve core rod sealing ring 8 and a sealing ring fixing block 9 which is clamped with the sealing element mounting seat 65 and has a center hole for the valve core rod 4 to pass through are arranged in the rear sealing element mounting seat 65.

[0043] The setting of the reset support spring 5 of the push-type switch can utilize the back shape of the rear end cavity wall of the rear end retreat cavity 63 of the valve core, and utilize the back shape to form a spring seat 66. The reset support spring 5 is arranged on the spring seat 66, and drives the reset movement of the push-type switch by supporting the valve core rod 4, and at the same time can also expand the diameter of the spring coil.

[0044] Reference numeral 7 is a sealing ring matched with the valve housing and arranged at the rear of the valve core main body tube 6. Reference numeral 16 is a sealing pad arranged at the front end of the valve core device.

[0045] In application, the valve core main body tube in the above-mentioned hair styling device is removed, and other parts are directly installed in the valve housing to realize the function and directly form a push-type quick-opening valve. This is also feasible and can also achieve the above-mentioned technical effect, so that the valve can be made very small and open quickly.

[0046] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are also used only for simplicity of description, and do not indicate or imply relative importance.

[0047] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the protection scope of the present invention.

Claims

1. A push-type quick-opening valve core device, comprising a push-type switch and a valve core assembly, wherein the valve core assembly comprises a valve core main body tube and a valve core, wherein the axial front end of the valve core main body tube is a water inlet, and a water outlet is arranged on the front side wall of the valve core main body tube, and a valve core rod capable of axial forward and backward movement is arranged on the central axis in the valve core main body tube, wherein the valve core rod is connected to the push-type switch, and the push-type switch controls the movement of the valve core rod, and the valve core is connected to the front end of the valve core rod; characterized in that: A front sealing structure is arranged in the valve core main body tube in front of the water outlet, and a rear sealing structure is arranged behind the water outlet. The movement stroke of the valve core satisfies: when the switch is closed, the valve core moves forward to seal with the front sealing structure and also seals with the rear sealing structure; when the valve core is opened, the valve core moves backward to be separated from the front sealing structure and still seals with the rear sealing structure; The valve core main body cylinder is provided with a valve core rear end retreat cavity behind the rear sealing structure, and the rear sealing structure is located between the valve core rear end retreat cavity and the water outlet. The valve core is a cylinder with a through hole, and the water inlet and the valve core rear end retreat cavity are connected. When the valve core is closed, the water inlet and the valve core rear end retreat cavity are still connected.

2. The push-type quick-opening valve core device according to claim 1, characterized in that The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backwards, and a diversion slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a diversion water outlet channel is formed between the diversion slope and the bowl-shaped sealing ring.

3. The push-type quick-opening valve core device according to claim 1, characterized in that The rear sealing structure adopts a bowl-shaped sealing ring with an opening forward, and a rear end inclined surface is arranged at the rear end of the valve core to cooperate with the sealing lip of the bowl-shaped sealing ring with an opening forward. When the switch is closed, the sealing lip is pressed on the rear end inclined surface by the water pressure of the rear end retreat cavity of the valve core.

4. The push-type quick-opening valve core device according to claim 1, characterized in that The valve core rod has a length sufficient to extend backward to the interior of the push-type switch.

5. The push-type quick-opening valve core device according to claim 4, characterized in that The upper part of the valve core rod constitutes the sliding shaft of the switch located inside its fixed seat and is connected to the control structure in the switch, or the upper part of the valve core rod is inserted into the connecting hole of the rotating gear sleeve in the switch.

6. The push-type quick-opening valve core device according to claim 1, characterized in that A groove matching with the rear end of the valve core cylinder is arranged on the rear end cavity wall of the valve core rear end retreat cavity, and when the valve core retreats, its rear end retreats into the groove.

7. The push-type quick-opening valve core device according to claim 1, characterized in that The valve core assembly also includes a fixing frame and a pressure ring. The outer diameter of the fixing frame is adapted to the inner diameter of the valve core main body tube and can just be inserted into the valve core main body tube from the front end. A limiting step is arranged inside the valve core main body tube. The rear sealing structure, the fixing frame and the front sealing assembly are sequentially inserted from the front port of the valve core main body tube and limited by the limiting step, and then are tightened with a pressure ring. The pressure ring is connected to the valve core main body tube.

8. The push-type quick-opening valve core device according to claim 7, characterized in that The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backward, and a guide slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a guide water outlet channel is formed between its guide slope and the bowl-shaped sealing ring; for the bowl-shaped sealing ring of the front sealing structure, a circle of front limit steps matching the shape of the bowl-shaped sealing ring is arranged at the front end of the fixing frame; and a rubber gasket is arranged between the bowl-shaped sealing ring and the front limit step, and the rubber gasket also has a bevel protruding from the inner side of the fixing frame, and the bevel is padded on the bevel of the bowl-shaped sealing ring, leaving the sealing lip of the bowl-shaped sealing ring as a free end.

9. A push-type quick-opening valve, comprising a housing, a push-type switch and a valve core assembly, wherein the valve core assembly comprises a valve core, the axial front port of the housing is a water inlet, the front side wall of the housing is provided with a water outlet, a valve core rod capable of axial forward and backward movement is provided on the central axis in the housing, the valve core rod is connected to the push-type switch, the push-type switch controls the movement of the valve core rod, and the valve core is connected to the front end of the valve core rod; characterized in that, A front sealing structure is arranged in front of the water outlet in the housing, and a rear sealing structure is arranged behind the water outlet. The movement stroke of the valve core satisfies: when the switch is closed, the valve core moves forward to seal with the front sealing structure and also seals with the rear sealing structure; when the valve core is opened, the valve core moves backward to be disengaged from the front sealing structure and still seals with the rear sealing structure; The shell is provided with a valve core rear end retreat cavity behind the rear sealing structure, and the rear sealing structure is located between the valve core rear end retreat cavity and the water outlet. The valve core is a cylinder body with a through hole, and the water inlet and the valve core rear end retreat cavity are connected. When the valve core is closed, the water inlet and the valve core rear end retreat cavity are still connected.

10. The push-type quick-opening valve according to claim 9, characterized in that The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backwards, and a diversion slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a diversion water outlet channel is formed between the diversion slope and the bowl-shaped sealing ring.

11. The push-type quick-opening valve according to claim 9, characterized in that The rear sealing structure adopts a bowl-shaped sealing ring with an opening forward, and a rear end inclined surface is arranged at the rear end of the valve core to cooperate with the sealing lip of the bowl-shaped sealing ring with an opening forward. When the switch is closed, the sealing lip is pressed on the rear end inclined surface by the water pressure of the rear end retreat cavity of the valve core.

12. The push-type quick-opening valve according to claim 9, characterized in that The valve core rod has a length sufficient to extend backward to the interior of the push-type switch.

13. The push-type quick-opening valve according to claim 12, characterized in that The upper part of the valve core rod constitutes the sliding shaft of the switch located inside its fixed seat and is connected to the control structure in the switch, or the upper part of the valve core rod is inserted into the connecting hole of the rotating gear sleeve in the switch.

14. The push-type quick-opening valve according to claim 9, characterized in that A groove matching with the rear end of the valve core cylinder is arranged on the rear end cavity wall of the valve core rear end retreat cavity, and when the valve core retreats, its rear end retreats into the groove.

15. The push-type quick-opening valve according to claim 9, characterized in that The valve core assembly also includes a fixing frame and a pressure ring. The outer diameter of the fixing frame is adapted to the inner diameter of the shell and can just be inserted into the valve core main body tube from the front end. A limiting step is set inside the shell. The rear sealing structure, the fixing frame and the front sealing assembly are sequentially inserted from the front port of the shell and limited by the limiting step, and then pressed by the pressure ring. The pressure ring is connected to the shell.

16. The push-type quick-opening valve according to claim 15, characterized in that The front sealing structure adopts a bowl-shaped sealing ring with an opening facing backward, and a guide slope is arranged around the front end of the valve core. When the valve core is opened, the valve core is disengaged from the bowl-shaped sealing ring, and a guide water outlet channel is formed between its guide slope and the bowl-shaped sealing ring; for the bowl-shaped sealing ring of the front sealing structure, a circle of front limit steps matching the shape of the bowl-shaped sealing ring is arranged at the front end of the fixing frame; and a rubber gasket is arranged between the bowl-shaped sealing ring and the front limit step, and the rubber gasket also has a bevel protruding from the inner side of the fixing frame, and the bevel is padded on the bevel of the bowl-shaped sealing ring, leaving the sealing lip of the bowl-shaped sealing ring as a free end.

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