Air inlet one-way valve and dredger

Abstract

The utility model belongs to the technical field of one-way valves, and particularly relates to an air inlet one-way valve and a dredger. The dredger comprises a main mounting seat which is provided with a one-way valve mounting hole, and an air inlet one-way valve is mounted in the one-way valve mounting hole; the air inlet one-way valve comprises an air inlet valve body and is provided with an air The air inlet valve cover is mounted at one end of the air inlet valve body, and forms a valve core mounting cavity communicated with the air inlet channel together with the air inlet valve body; the air inlet valve element is movably arranged in the valve element installation cavity and used for sealing the air inlet channel in a one-way mode. Wherein the air inlet valve body is provided with a valve cover mounting part for mounting the air inlet valve cover; the air inlet valve sealing part is used for sealing the outer side wall of the air inlet valve body; and the air inlet fixing part is used for fixing the air inlet valve body. When the air inlet valve is mounted in the one-way valve mounting hole of the main mounting seat, the air inlet fixing part of the air inlet valve body can be effectively fixed in the one-way valve mounting hole, fixed connection is realized, and the air inlet one-way valve is prevented from falling off due to high-pressure impact.

Description

TECHNICAL FIELD

[0001] The utility model belongs to one -way valve technical field, especially point to a kind of air inlet one-way valve and dredger. BACKGROUND

[0002] People often appear in daily life sewer pipe, toilet and so on blocked phenomenon, and dredger can help people solve this trouble.The existing dredger is usually as in prior art CN218881073U proposed air pressure toilet dredger, inflator is inflated to the gas storage device by air inlet one-way valve to form high-pressure gas, then control high-pressure gas from the plug device of the gas outlet end of gas storage device release, under the impact of powerful high-pressure gas, realize the dredging of sewer pipe or toilet.

[0003] In the above disclosed air pressure toilet dredger, air inlet one-way valve is installed in the gas outlet end of inflator by interference fit, under the repeated inflation effect of inflator, air inlet one-way valve is prone to loosen, even fall off phenomenon, so that one-way valve loses the effect of one-way sealing, high-pressure gas cannot be formed in gas storage device, seriously affect the service life of product, increase the cost of after-sales maintenance. SUMMARY

[0004] The utility model aims at providing a kind of air inlet one-way valve and dredger of stable installation, reliable performance.

[0005] The utility model aims at being realized as follows:

[0006] The utility model provides an air inlet one-way valve, with such characteristics, comprising: air inlet valve body, with air inlet channel;Air inlet valve cover, installation in one end of air inlet valve body, with air inlet valve body together form the valve core installation cavity that communicates air inlet channel;And air inlet valve core, activity is arranged in valve core installation cavity or / and air inlet channel, for one-way sealing air inlet channel;Wherein, air inlet valve body has: valve cover installation part, for installing air inlet valve cover;Air inlet valve sealing part, for sealing the outside wall of air inlet valve body;And air inlet fixed part, for fixedly installing air inlet valve body.

[0007] In the air inlet one-way valve provided by the utility model, it can also have the following characteristics, wherein the air inlet fixed part is a plurality of elastic hooks that are circumferentially arranged at the end portion of the air inlet valve body or an external thread structure arranged on the outside wall of the air inlet valve body.

[0008] In the air inlet one-way valve provided by the utility model, it can also have the following characteristics, wherein the air inlet valve body is further provided with an air inlet valve limiting portion for limiting the axial installation position of the air inlet valve body.

[0009] The air intake one-way valve proposed in the present invention may also have such a feature, wherein a sealing groove is provided on the sealing portion of the air intake valve, and an air intake sealing ring is provided in the sealing groove.

[0010] The air intake one-way valve proposed in the present invention may also have such a feature that a material reduction groove is provided on the air intake valve core.

[0011] The intake one-way valve proposed in the present invention may also have such a feature, wherein the middle part of the intake valve cover is hollowed out, and at least one clamping block is provided on the inner wall, and L-shaped clamping grooves corresponding to the clamping blocks are provided around the valve cover mounting portion. When the clamping block enters the corresponding L-shaped clamping groove, the intake valve cover and the intake valve body are clamped together by rotation; a first limiting protrusion is provided on the inner side of the clamping block, and a second limiting protrusion is provided at the corresponding position of the inner wall of the L-shaped clamping groove. The first limiting protrusion and the second limiting protrusion interact with each other to limit the circumferential position of the intake valve cover.

[0012] The intake one-way valve proposed in the present invention may also have such a feature, wherein the intake valve core has an intake guide portion located in the intake channel and an intake sealing portion located in the valve core mounting cavity, and the outer diameter of the intake guide portion is less than the inner diameter of the intake channel < the outer diameter of the intake sealing portion < the inner diameter of the valve core mounting cavity.

[0013] The utility model proposes a clearing device with the following characteristics, including: a main mounting seat, having a one-way valve mounting hole; an air intake one-way valve, installed in the one-way valve mounting hole; an air pumping device, having an air pumping cavity, which is connected to the air intake end of the air intake one-way valve; and an air storage device, having an air storage cavity, which is connected to the air outlet end of the air intake one-way valve; wherein the air intake one-way valve is the above-mentioned air intake one-way valve.

[0014] The dredge proposed in the present invention may also have such a feature, wherein a snap-fitting portion adapted to the elastic hook of the air intake fixing portion, or an internal thread structure adapted to the external thread structure of the air intake fixing portion, or a limiting step portion adapted to the air intake valve limiting portion of the air intake valve body is provided in the one-way valve mounting hole.

[0015] The clearing device proposed in the present invention may also have such a feature, wherein the clamping portion includes a first guide slope and a first clamping surface, and the clamping end of the elastic hook has a second guide slope adapted to the first guide slope and a second clamping surface adapted to the first clamping surface.

[0016] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0017] According to the utility model, an intake one-way valve is proposed. When it is installed in the one-way valve mounting hole of the main mounting seat, the intake fixing portion of the intake valve body can be effectively fixed in the one-way valve mounting hole to achieve a fixed connection, thereby preventing the intake one-way valve from falling off due to high-pressure impact. At the same time, the intake valve sealing portion of the intake valve body can ensure the installation sealing of the intake one-way valve and reduce the risk of air leakage.

[0018] The utility model proposes an intake one-way valve, whose intake fixing part is a plurality of elastic hooks circumferentially arranged at the end of the intake valve body or an external thread structure arranged on the outer side wall of the intake valve body, which is fixed by the clamping part or the internal thread structure in the one-way valve mounting hole respectively, and has the advantages of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model dredge.

[0020] Figure 2 It is a cross-sectional view of the utility model dredge.

[0021] Figure 3 It is a cross-sectional view of the air pumping device of the present invention.

[0022] Figure 4 It is a structural exploded view of the air pumping device of the utility model.

[0023] Figure 5 It is a cross-sectional view of the installation location of the air intake one-way valve of the utility model.

[0024] Figure 6 It is a structural diagram of the air intake one-way valve of the utility model.

[0025] Figure 7 It is a structural exploded view of the air intake one-way valve of the utility model.

[0026] The meaning of the numbers in the figure:

[0027] Inflating device 1, air storage device 2, pressure display device 3, deflation control device 4, air intake check valve 5,

[0028] main piston 10, pump 11, pumping cavity 111, pumping rod 12, rod body 121, pumping piston 122, limiting block 123, pumping sealing ring 124, hand holding part 13, fixing seat 131, handle 132, limiting hole 133, insertion hole 134, main mounting seat 14, air inlet cavity 141, inner ring wall 142, outer ring wall 143, connecting cavity 144, one-way valve mounting hole 145, clamping part 146, first guide inclined surface 1461, first clamping surface 1462, limiting step part 147, air outlet mounting seat 15, air outlet cavity 151, air outlet 152, clamping groove 153, clamping convex point 154, pressure mounting seat 16, pressure cavity 161, pressure air outlet 162, end cover 17, inner ring part 171, outer ring part 172, through hole 173, shell 18, notch 181,

[0029] air cylinder 21, air storage mounting end 211, air outlet 212, air outlet pipe 22, air outlet mounting seat 221, air outlet cavity 23, air storage cavity 24, air outlet nozzle 25, rubber ring 26, air outlet pipe support frame 27, air storage sealing ring 28,

[0030] air outlet mounting seat 15, air outlet cavity 151, air outlet 152, clamping groove 153, clamping convex point 154, pressure mounting seat 16, pressure cavity 161, pressure air outlet 162, end cover 17, inner ring part 171, outer ring part 172, through hole 173, shell 18, notch 181,

[0031] air outlet mounting seat 15, air outlet cavity 151, air outlet 152, clamping groove 153, clamping convex point 154, pressure mounting seat 16, pressure cavity 161, pressure air outlet 162, end cover 17, inner ring part 171, outer ring part 172, through hole 173, shell 18, notch 181, DETAILED DESCRIPTION

[0032] The utility model will be described further in combination with specific embodiments as follows:

[0033] It should be understood that the structure, proportion, size and the like shown in the drawings of the embodiments of the present application are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not limit the conditions that can be implemented by the present application, and therefore do not have substantial technical significance. Any modification of structure, change of proportional relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. Meanwhile, the terms such as "inner" and "outer" used in the embodiments of the present application are only used for clear description, and do not limit the scope of the present application, and the change or adjustment of the relative relationship should also be considered as the scope of the present application without substantial change of technical content.

[0034] When an element is referred to as being "connected", "disposed", "mounted", or "coupled" to another element, it can be directly connected, disposed, mounted, or coupled to the other element or can be indirectly connected, disposed, mounted, or coupled to the other element through an intermediate element.

[0035] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0036] Embodiment 1:

[0037] The air inlet one-way valve of the present embodiment is used for one-way conduction of gas, and is mainly applied to a dredging device, especially a dredging device for dredging a toilet or a sewer, and can also be applied to an air inlet device of other equipment. The present embodiment takes the dredging device as an example to specifically describe the structure and mounting mode of the air inlet one-way valve.

[0038] As shown in Figure 1 and Figure 2 , the dredging device at least comprises a main mounting base 14, a pumping device 1, a gas storage device 2, an air inlet one-way valve 5, a pressure display device 3, and a gas release control device 4.

[0039] The main mounting base 14 is provided with a one-way valve mounting hole 145, the air inlet one-way valve 5 is mounted in the one-way valve mounting hole 145, the pumping device 1 is provided with a pumping cavity 111, the pumping cavity 111 is communicated with an air inlet end of the air inlet one-way valve 5, the gas storage device 2 is provided with a gas storage cavity 24, the gas storage cavity 24 is communicated with an air outlet end of the air inlet one-way valve 5, and the pumping device 1 enters high-pressure gas in the pumping cavity 111 into the gas storage cavity 24 of the gas storage device 2 through the air inlet one-way valve 5. The main mounting base 14 is further provided with a gas release mounting base 15 and a pressure mounting base 16, and is respectively provided with the pressure display device 3 for detecting the pressure of the gas storage cavity 24 and the gas release control device 4 for controlling the gas release of the gas storage cylinder 21.

[0040] As shown in Figure 3 , 4 , the pumping device 1 comprises a pumping cylinder 11 made of plastic, a pumping rod 12, an end cover 17, a shell 18, and a main piston 10.

[0041] The pumping cylinder 11 and the main mounting base 14 can be separately arranged or integrally arranged. In the present embodiment, the pumping cylinder 11, the main mounting base 14, the gas release mounting base 15, and the pressure mounting base 16 are integrally arranged. Compared with the mode that the pumping cylinder 11 is separately arranged on the base 14 through a sealing ring, the sealing structure at this position is reduced, the sealing performance of the product is improved, and the air leakage risk of the pumping device during pumping is reduced.

[0042] The pump 11 is hollow and contains a pumping chamber 111. One end of a pumping rod 12 is movably mounted within the chamber 111, while the other end extends out of the pump 11 and is provided with a handle 13. The main mounting base 14, located at the bottom of the pump 11 and used to mount the air reservoir 21, is hollow and contains an intake chamber 141, within which the main piston 10 is movably mounted. In this embodiment, the axis of the pumping chamber 111 is coaxial with the axis of the intake chamber 141.

[0043] The main mounting base 14 is provided with an inner annular wall 142 and an outer annular wall 143. The inner side of the inner annular wall 142 surrounds and forms an air intake cavity 141. A one-way valve mounting hole 145 is provided between the air intake cavity 141 and the pumping cavity 111. The air intake one-way valve 5 is installed in the one-way valve mounting hole 145. The gas in the pumping cavity 141 pushes the air intake one-way valve 5 open and then enters the air intake cavity 141 and the air storage cavity 24. The inner side of the outer annular wall 143 is provided with a mounting portion for mounting the air reservoir 21. In this embodiment, the mounting portion is internally threaded, and the air reservoir 21 is provided with a matching external thread. The air reservoir 21 and the main mounting base 14 are connected by threads. A connecting cavity 144 is formed between the inner annular wall 142 and the outer annular wall 143, communicating with the interior of the gas reservoir 21. The air intake cavity 141 and the connecting cavity 144 are in communication. During operation, gas from the pumping cavity 111 enters the air intake cavity 141 through the air intake one-way valve 5 when it is open. The gas then enters the connecting cavity 144 (i.e., the air storage cavity of the gas reservoir 21) through the gap between the air intake cavity 141 and the primary piston 10. During this process, the primary piston 10 moves under the action of the high-pressure gas until it blocks the air outlet pipe 22 in the gas reservoir 21.

[0044] In this embodiment, the air intake chamber 141 and the air storage chamber 24 are always connected through the gap between the air intake chamber 141 and the main piston 10. Then, the gas entering the inflation chamber 141 through the air intake one-way valve 5 will enter the air intake chamber 141 and the air storage chamber 24 at the same time, and realize the storage of high-pressure gas.

[0045] like Figure 3 As shown, the deflation control device 4 is mounted on the main mounting seat 14 and has a deflation button 41, a deflation valve 42 and a deflation connecting rod 43. The deflation button 41 is exposed and movably arranged on the outer shell 18, and is used to control the opening of the deflation valve 42. The deflation valve 42 is mounted on the deflation mounting seat 15, and the deflation mounting seat 15 is integrally formed on the main mounting seat 14. The deflation connecting rod 43 is installed between the deflation button 41 and the deflation valve 42, and is used to link the deflation button 41 and the deflation valve 42, that is, by sliding the deflation button 41, the deflation connecting rod 43 opens the deflation valve 42 for deflation.

[0046] The side wall of the inflator 11 is recessed inwardly near the end of the inflator 11 close to the air inlet cavity 141, and a cylindrical deflation mounting seat 15 is formed around the recessed end. The deflation mounting seat 15 has a deflation cavity 151 formed therein and connected to the air inlet cavity 141. The deflation valve 42 of the deflation control device 4 is arranged on the deflation mounting seat 15. The deflation cavity 151 and the air inlet cavity 141 are connected to form a deflation opening 152. When the deflation control device 4 is opened, the air inlet cavity 141 is connected to the outside air. The gas in the air inlet cavity 141 can enter the deflation cavity 151 through the deflation opening 152, and is discharged to the outside through the deflation control device 4 to form a low-pressure environment. The main piston 10 is then pushed open by the high-pressure gas in the gas storage cavity, the outlet pipe 22 is opened, and the high-pressure gas in the gas storage cavity 24 is instantaneously discharged from the outlet pipe 22 to achieve high-pressure clearing.

[0047] The pressure mounting seat 16 has a pressure cavity 161 formed therein. The end of the pressure display device 3 is arranged on the pressure mounting seat 16. The pressure mounting seat 16 has a pressure opening 162 formed therein and connected to the connection cavity 144. The gas in the connection cavity 144 (gas cylinder 21) can enter the pressure cavity 161 through the pressure opening 162, so that the pressure display device 3 can detect the gas pressure in the gas cylinder 21 and display the current gas pressure value. Specifically, the pressure display device 3 is arranged on the pressure mounting seat 16. The pressure display device 3 includes a pressure valve body with a transparent window and a pressure detection component arranged in the pressure valve body. The housing 18 has a gap 181 formed therein for exposing the transparent window. The pressure display device 3 is arranged on the pressure mounting seat 16 and displays the pressure value through the transparent window, so that the user can view and know the gas pressure in the gas storage cavity 24 in real time. When the preset gas pressure is reached, the deflation control device can be started to deflate.

[0048] In this embodiment, the axis of the inflator cavity 111 is coaxial with the axis of the air inlet cavity 141. The pressure mounting seat 16 and the deflation mounting seat 15 are formed on the two sides of the inflator 11, respectively. The deflation control device 4 and the pressure display device 3 can be arranged on the two sides of the inflator 11, respectively.

[0049] The end cap 17 is arranged on the end of the inflator 11 away from the main mounting seat 14. The end cap 17 has an inner ring portion 171 and an outer ring portion 172. The inner side of the inner ring portion 171 has a through hole 173 formed therearound for the inflator rod 12 to pass through. The inner wall of the through hole 173 and the inflator rod 12 have a gap for gas to enter. During inflation, the outside air enters the inflator cavity 111 through the gap. The inner wall of the outer ring portion 172 has a connecting portion connected to the inflator 11. In this embodiment, the connecting portion is an internal thread. The top of the inflator 11 is formed with an external thread. The inflator 11 and the end cap 17 are connected by screwing. In actual situations, the connecting portion can also be a buckle.

[0050] The shell 18 is sleeved on the outer periphery of the inflator 11, and one end of the shell 18 abuts against the outer ring wall 143 of the main mounting seat 14, and the other end abuts against the outer ring portion 172 of the end cover 17, that is, the main mounting seat 14 and the end cover 17 clamp the shell 18 therebetween, compared with the screw fixing mode of the left and right shells in the prior art, the installation structure is greatly simplified, and the installation efficiency is improved.

[0051] The inflator rod 12 has a rod body 121 and an inflator piston 122, one end of the rod body 121 extends into the inflator cavity 111 and forms the inflator piston 122, the diameter of the inflator piston 122 is greater than the diameter of the rod body 121 and also greater than the inner diameter of the through hole 173 on the end cover 17, so that the end cover 17 can limit the inflator piston 122 in the inflator 11 to avoid falling out; the inflator piston 122 is further provided with an inflator sealing ring 124 between the outer circle of the inflator piston 122 and the inner wall of the inflator cavity 111. The rod body 121 is hollow, and a ventilation hole 125 is formed in the end close to the inflator piston 122 to communicate the inside of the rod body 121 with the inflator cavity 111, and the end away from the inflator piston 122 is communicated with the outside, that is, the inside of the rod body 121 is communicated with the inflator cavity 111, which makes it more labor-saving when the inflator rod 12 is pulled back and forth.

[0052] The other end of the rod body 121 extends out of the inflator 11 and is provided with a hand holding portion 13, as shown in Figure 4 The hand holding portion 13 includes a handle 132 for holding and a fixing seat 131 for fixing with the rod body 121, the handle 132 is in a cylindrical shape arranged perpendicularly to the rod body 121, the fixing seat 131 is provided with an insertion hole 134 in the middle for inserting the end of the rod body 121 away from the inflator piston 122, and the fixing seat 131 is provided with a limiting hole 133 on the side, and the rod body 121 is provided with a limiting clamping block 123 matched with the limiting hole 133, and the limiting clamping block 123 is clamped into the limiting hole 133.

[0053] As shown in Figures 5-7 The air inlet one-way valve 5 includes an air inlet valve body 51, an air inlet valve cover 52, an air inlet valve core 53 and an air inlet reset member 56.

[0054] In this embodiment, the air inlet valve body 51 has an air inlet channel 511 and a valve core installation cavity 512 in communication with each other, and the air inlet valve core 53 is movably arranged in the air inlet channel 511 and the valve core installation cavity 512, and is used to seal the air inlet channel 511 in one direction, i.e. to seal the inflation chamber of the inflator and the gas storage chamber of the gas storage device in one direction, so as to prevent the high-pressure gas entering the gas storage chamber from leaking from the air inlet check valve. The air inlet valve core 53 has an air inlet guide part 531 located in the air inlet channel 511 and an air inlet sealing part 532 located in the valve core installation cavity 512, and the outer diameter of the air inlet guide part 531 is < the inner diameter of the air inlet channel 511 < the outer diameter of the air inlet sealing part 532 < the inner diameter of the valve core installation cavity 512. The air inlet valve core 53 can be a silica gel part or a plastic part, and when it is a plastic part, an air inlet sealing gasket 55 can also be arranged on the air inlet sealing part 532 of the air inlet valve core 53, further improving the sealing performance of the air inlet valve core 53. The middle part of the air inlet valve cover 52 is hollow, and is installed at one end of the air inlet valve body 51, and is used to prevent the air inlet valve core 53 from leaving the valve core installation cavity 512.

[0055] When the high-pressure gas in the inflation chamber 111 enters from the air inlet channel 511, it pushes the air inlet valve core 53 away, and enters the air inlet chamber 141 through the valve core installation cavity 512, and when the pressure in the air inlet chamber 141 is higher than that in the inflation chamber 111, the high-pressure gas abuts the air inlet sealing part 532 of the air inlet valve core 53 against the end face of the air inlet channel 511, thereby realizing one-way sealing.

[0056] As shown in Figure 7 , the air inlet valve body 51 has a valve cover installation part 513 for installing the air inlet valve cover 52, an air inlet valve sealing part 514 for sealing the outer side wall of the air inlet valve body 51, an air inlet valve limiting part 516 for limiting the axial installation position of the air inlet valve body 51, and an air inlet fixing part 515 for fixing the air inlet valve body 51.

[0057] The air inlet valve cover 52 is a cover-shaped structure, the middle part of which is hollow, and the inner side wall is provided with at least one clamping block 521, and the periphery of the valve cover installation part 513 is provided with an L-shaped clamping groove 5131 corresponding to the clamping block 521, and the L-shaped clamping groove 5131 is surrounded by an L-shaped protrusion. When the clamping block 521 enters the corresponding L-shaped clamping groove 5131, the clamping of the air inlet valve cover 52 and the air inlet valve body 51 is realized by rotating, thereby fixing the axial position. The inner side of the clamping block 521 is provided with a first limiting protrusion 522, and the inner wall of the L-shaped clamping groove 5131 is provided with a second limiting protrusion 5132 at the corresponding position, and the first limiting protrusion 522 and the second limiting protrusion 5132 interact to limit the circumferential position of the air inlet valve cover 52.

[0058] In another embodiment, the air inlet valve cover 52 can be fixed on the valve cover installation part 513 through a threaded structure.

[0059] As shown in Figure 5As shown, the air inlet valve sealing portion 514 is arranged at the middle portion of the air inlet valve body 51 and can be tightly fitted with the side wall of the one-way valve mounting hole 145 to achieve sealing. A sealing groove can also be arranged on the air inlet valve sealing portion 514, and an air inlet sealing ring 54 is arranged in the sealing groove. The air inlet sealing ring 54 is tightly fitted with the side wall of the one-way valve mounting hole 145 to achieve sealing.

[0060] The air inlet fixing portion 515 is a plurality of elastic hooks 5151 arranged at the end portion of the air inlet valve body 51 in the circumferential direction, and the air inlet limiting portion 516 is a step surface arranged at one end of the air inlet valve sealing portion 514. The one-way valve mounting hole 145 is provided with a clamping portion 146 matched with the elastic hooks 5151 of the air inlet fixing portion 515 and a limiting step portion 147 matched with the air inlet limiting portion 516 of the air inlet valve body 51. In this embodiment, the clamping portion 146 is an annular protrusion having a first guide inclined surface 1461 and a first clamping surface 1462. The clamping end of the elastic hook 5151 has a second guide inclined surface 5152 matched with the first guide inclined surface 1461 and a second clamping surface 5153 matched with the first clamping surface 1462. When the air inlet one-way valve 5 is installed into the one-way valve mounting hole 145, the second guide inclined surface 5152 of the elastic hook 5151 is in contact with the first guide inclined surface 1461 of the clamping portion 146, so that the elastic hook 5151 is deformed inwardly until the second clamping surface 5153 of the elastic hook 5151 is clamped with the first clamping surface 1462 of the clamping portion 146, and at the same time, the air inlet limiting portion 516 is abutted against the limiting step portion 147 to achieve fixed installation of the air inlet valve body 51. When the outlet end of the air inlet one-way valve is under high pressure (i.e., the air inlet cavity is under high pressure), the high pressure abuts the air inlet limiting portion 516 against the limiting step portion 147 to achieve face sealing, thereby further improving the sealing effect of the installation position.

[0061] In another embodiment, a material reducing groove portion 517 is further arranged on the air inlet valve core 53 to reduce the material cost.

[0062] In another embodiment, an air inlet resetting member 56 is further arranged in the valve core mounting cavity. The air inlet resetting member 56 is preferably a spring, the outer diameter of the spring is matched with the inner diameter of the valve core mounting cavity, and the spring is arranged between the air inlet valve cover 52 and the air inlet valve core to provide the force for sealing the air inlet passage of the air inlet valve core, thereby better achieving the resetting and sealing of the air inlet valve core.

[0063] In another embodiment, a spring positioning protrusion or a spring positioning recess is arranged on the air inlet valve cover 52 and the air inlet sealing portion 532 of the air inlet valve core to achieve reliable installation of the air inlet resetting member 56.

[0064] In another embodiment, the air inlet valve core is a steel ball and is movably arranged in the valve core mounting cavity 512.

[0065] AsFigure 2 As shown, the gas storage device 2 is installed below the main mounting seat 14, and has a gas storage cylinder 21 in a hollow cylindrical structure, one end of which is formed into a gas storage mounting end 211 mounted to the main mounting seat 14, and the other end is provided with a gas outlet 212, and the middle part of the inside of the gas storage cylinder 21 is provided with a gas outlet pipe 22, which is provided with a gas outlet cavity 23 communicated to the outside, and the gas outlet pipe 22 and the inner wall of the gas storage cylinder 21 form a gas storage cavity 24. In this embodiment, the gas storage cylinder 21 is a steel structure, and the gas storage cylinder 21 and the gas outlet pipe 22 are separately arranged, the bottom of the gas outlet pipe 22 is mounted at the gas outlet 212 through a gas outlet mounting seat 221 and a sealing gasket, and the middle part is positioned in the gas storage cylinder 21 through a gas outlet pipe support 27, and at the same time, a gas outlet nozzle 25 is fixedly installed at the gas outlet 212, and the outer end of the gas outlet nozzle is provided with a threaded structure or a quick mounting structure for connecting with a plug device.

[0066] The outer periphery of the gas storage mounting end 211 is provided with external threads matched with the internal threads in the inner side of the outer ring wall 143 of the main mounting seat 14, and the gas storage mounting end 211 is connected on the outer ring wall 143 through threads, and the top of the connecting cavity 144 formed between the outer ring wall 143 and the inner ring wall 142 is provided with a gas storage sealing ring 28, and the top of the gas storage mounting end 211 is arranged on the gas storage sealing ring 28, so that the main mounting seat 14 and the gas storage mounting end 211 are sealingly connected. The gas outlet pipe 22 is a through pipe with both ends open, and a rubber ring 26 is sleeved on the end of the gas outlet pipe 22 away from the gas outlet 212 (i.e. the gas inlet end of the gas outlet pipe 22), and the rubber ring 26 is used to cooperate with the main piston 10. When inflating, the main piston 10 is pushed downward (i.e. moves toward the rubber ring 26) under the action of the gas from the inflation cavity 111, and directly moves to the position where the bottom surface of the main piston 10 is in contact with the top of the rubber ring 26. Under the action of high-pressure gas, the main piston 10 is tightly arranged on the rubber ring 26, thereby closing the gas inlet end of the gas outlet pipe 22, and isolating the communication between the gas outlet cavity 23 and the gas storage cavity 24, so that the gas from the inflation cavity 111 can only enter the connecting cavity 144 and the gas storage cavity 24 through the gas inlet cavity 141, thereby realizing the gas storage in the gas storage cavity 24.

[0067] In addition, the diameter of the side of the main piston 10 facing the rubber ring 26 (i.e. the acting surface in contact with the rubber ring 26) is greater than the outer diameter of the rubber ring 26, so that in the deflation process, the main piston 10 can be pushed back into the gas inlet cavity 141 by the gas accumulated in the gas storage cavity 24, and once the main piston 10 leaves the rubber ring 26, the gas accumulated in the gas storage cavity 24 can be quickly released from the gas outlet nozzle 25 along the gas outlet pipe 22, thereby realizing high-pressure dredging.

[0068] Embodiment 2:

[0069] The embodiment is basically same as the embodiment 1, and the difference is that the air inlet fixing part 515 is an external thread structure arranged on the outer side wall of the air inlet valve body 51, the one-way valve mounting hole 145 is internally provided with an internal thread structure matched with the external thread structure of the air inlet fixing part 515, and the air inlet one-way valve 5 is fixedly mounted in the one-way valve mounting hole 145 through the thread structure.

[0070] The above embodiment is only a preferred embodiment of the present application, and does not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An air intake check valve, characterized in that: include: an intake valve body having an intake passage; An intake valve cover is mounted on one end of the intake valve body and forms a valve core mounting cavity communicating with the intake passage together with the intake valve body; as well as An air intake valve core, movably disposed in the valve core mounting cavity and / or the air intake passage, for one-way sealing the air intake passage; Wherein, the intake valve body has: A valve cover mounting portion, used for mounting the intake valve cover; an intake valve sealing portion, configured to seal the outer side wall of the intake valve body; and The air intake fixing portion is used for fixing and installing the air intake valve body.

2. The air intake check valve according to claim 1, characterized in that: The air intake fixing portion is a plurality of elastic hooks circumferentially arranged on the end of the air intake valve body or an external thread structure arranged on the outer side wall of the air intake valve body.

3. The air intake check valve according to claim 2, characterized in that: The intake valve body is further provided with an intake valve limiting portion for limiting the axial installation position of the intake valve body; or / and, the intake valve core is further provided with a material reduction groove portion.

4. The air intake check valve according to claim 3, characterized in that: A sealing groove is provided on the sealing portion of the air intake valve, and an air intake sealing ring is provided in the sealing groove.

5. The air intake check valve according to claim 1, characterized in that: The middle part of the intake valve cover is hollowed out, and at least one clamping block is provided on the inner side wall. L-shaped clamping grooves corresponding to the clamping blocks are provided around the valve cover mounting portion. When the clamping block enters the corresponding L-shaped clamping groove, the intake valve cover and the intake valve body are clamped together by rotation.

6. The air intake check valve according to claim 5, characterized in that: A first limiting protrusion is provided on the inner side of the clamping block, and a second limiting protrusion is provided on the corresponding position of the inner wall of the L-shaped clamping groove. The first limiting protrusion and the second limiting protrusion interact with each other to limit the circumferential position of the intake valve cover.

7. An air intake check valve according to any one of claims 1 to 6, characterized in that: The intake valve core has an intake guide portion located in the intake passage and an intake sealing portion located in the valve core installation cavity, and the outer diameter of the intake guide portion is less than the inner diameter of the intake passage and less than the outer diameter of the intake sealing portion and less than the inner diameter of the valve core installation cavity.

8. A dredge, characterized in that: include: A main mounting seat having a one-way valve mounting hole; An air intake one-way valve is installed in the one-way valve installation hole; an air pumping device, comprising an air pumping cavity, the air pumping cavity being connected to the air inlet end of the air inlet one-way valve; and An air storage device having an air storage cavity connected to the air outlet end of the air inlet one-way valve; Wherein, the air intake one-way valve is the air intake one-way valve according to any one of claims 1 to 7.

9. The plumbing fixture according to claim 8, characterized in that: The one-way valve mounting hole is provided with a clamping portion adapted to the elastic hook of the intake fixing portion, or an internal thread structure adapted to the external thread structure of the intake fixing portion, or a limiting step portion adapted to the intake valve limiting portion of the intake valve body.

10. The plumbing fixture according to claim 9, characterized in that: The clamping portion includes a first guiding inclined surface and a first clamping surface, and the clamping end of the elastic hook has a second guiding inclined surface adapted to the first guiding inclined surface and a second clamping surface adapted to the first clamping surface.

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