Air inlet one-way valve for dredger and dredger

Abstract

The utility model belongs to the technical field of dredgers, and particularly relates to an air inlet one-way valve for a dredger and the 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 which is provided with an air inlet channel and is communicated with the inflating cavity and the air storage cavity; 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. The air inlet reset piece is located between the air inlet valve cover and the air inlet valve element and used for providing acting force for the air inlet valve element to seal the air inlet channel, rapid reset sealing of the air inlet valve element is achieved, and the air leakage risk is reduced. When the inflating cavity stops or resets, the air inlet sealing part of the air inlet valve element is rapidly reset and abuts against the end face of the air inlet channel under the action of the air inlet reset piece, and therefore rapid sealing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of dredger, and particularly relates to a gas inlet check valve for a dredger and the dredger. BACKGROUND

[0002] People often encounter blockage of sewer pipes, toilets and the like in daily life, and a dredger can help people solve this problem. The existing dredger is usually a gas pressure type toilet dredger as proposed in the prior art CN218881073U. The gas inlet check valve is used to inflate the gas storage device to form high-pressure gas, and then control the high-pressure gas to be released from the plug device at the gas outlet end of the gas storage device. Under the impact of the powerful high-pressure gas, the sewer pipe or toilet is dredged.

[0003] In the above-mentioned gas pressure type toilet dredger, the gas inlet check valve includes a gas inlet valve body and a gas inlet valve core. The gas inlet valve body has a gas inlet channel and a valve core mounting cavity that are in communication with each other. The gas inlet valve core has a gas inlet guide portion located in the gas inlet channel and a gas inlet sealing portion located in the valve core mounting cavity. The gas inlet sealing portion seals the gas inlet channel by face sealing. Generally, each time the gas inlet check valve is inflated, the high-pressure gas in the gas inlet channel enters once, the high-pressure gas pushes the gas inlet valve core open, and the high-pressure gas enters the gas inlet cavity and the gas storage cavity of the gas storage device through the valve core mounting cavity. When the gas inlet check valve is manually reset or stopped, the pressure in the gas inlet cavity is higher than that in the gas inlet channel, and the high-pressure gas abuts the gas inlet sealing portion of the gas inlet valve core against the end face of the gas inlet channel, thereby achieving one-way sealing.

[0004] The time for the gas inlet valve core to reset and seal depends on factors such as the gas pressure in the gas inlet cavity, the cross-sectional area of the gas inlet sealing portion, and the distance of the gas inlet valve core being pushed out. When the gas inlet check valve is just starting to work, if the gas inlet pressure in the gas inlet cavity is insufficient, the gas inlet valve core will reset and seal slowly, and the gas inlet check valve will leak, which will affect the normal storage of gas in the gas storage device, affect the user's experience, and increase the difficulty and cost of after-sales maintenance. SUMMARY

[0005] The utility model aims at providing a gas inlet check valve and a dredger which are stable in installation and reliable in performance.

[0006] The utility model is achieved as follows:

[0007] The utility model provides a kind of air intake check valve for dredger, with such features, it is installed between the inflator of dredger and gas storage device, it includes: air inlet valve body, with air inlet passage, and the air inlet passage is connected the inflator cavity of inflator and the gas storage cavity of gas storage device;Air inlet valve cover, it is installed in one end of air inlet valve body, with air inlet valve body together form the valve core installation cavity that communicates air inlet passage;Air inlet valve core, it is movably arranged in valve core installation cavity or / and the air inlet passage, for one-way sealing air inlet passage;And air inlet reset piece, it is installed in valve core installation cavity, and it is used to provide the force of air inlet valve core sealing air inlet passage.

[0008] In the air intake check valve for dredger provided by the utility model, the air inlet reset piece can be a spring, which is installed between the air inlet valve core and the air inlet valve cover.

[0009] In the air intake check valve for dredger provided by the utility model, the air inlet valve core or / and the air inlet valve cover can be provided with a spring positioning protrusion or a spring positioning recess.

[0010] In the air intake check valve for dredger provided by the utility model, the air inlet valve core can have an air inlet guide part located in the air inlet passage and an air inlet sealing part located in the valve core installation cavity, and the outer diameter of the air inlet guide part is less than the inner diameter of the air inlet passage, the inner diameter of the air inlet passage is less than the outer diameter of the air inlet sealing part, and the outer diameter of the air inlet sealing part is less than the inner diameter of the valve core installation cavity.

[0011] In the air intake check valve for dredger provided by the utility model, the air inlet reset piece can be a silica gel piece or a plastic piece, and an air inlet sealing gasket can be further arranged on the air inlet sealing part of the plastic piece.

[0012] In the air intake check valve for dredger provided by the utility model, the air inlet valve body can have a valve cover mounting part for mounting the air inlet valve cover, an air inlet valve sealing part for sealing the outer sidewall of the air inlet valve body, and an air inlet fixing part for fixing the air inlet valve body, wherein the air inlet fixing part can be a plurality of elastic hooks arranged circumferentially on the end part of the air inlet valve body or an external thread structure arranged on the outer sidewall of the air inlet valve body.

[0013] In the air intake check valve for dredger provided by the utility model, the air inlet valve body can further be provided with an air inlet valve limiting part for limiting the axial installation position of the air inlet valve body, and the air inlet valve sealing part can be provided with a sealing groove, and an air inlet sealing ring can be arranged in the sealing groove.

[0014] The air inlet one-way valve for the dredging device has the characteristics that the middle part of the air inlet valve cover is hollowed out, at least one clamping block is arranged on the inner side wall, L-shaped clamping grooves corresponding to the clamping blocks are arranged around the valve cover mounting part, the clamping blocks are clamped into the L-shaped clamping grooves, and the clamping blocks are clamped to the L-shaped clamping grooves by rotating.

[0015] The utility model provides a kind of dredging device, with such characteristics, comprising: main mounting seat, with one-way valve mounting hole;

[0016] Air inlet one-way valve is installed in one-way valve mounting hole;Pumping device, with pumping cavity, which is communicated with the air inlet end of air inlet one-way valve;And gas storage device, with gas storage cavity, which is communicated with the air outlet end of air inlet one-way valve;

[0017] Wherein, air inlet one-way valve is the above-mentioned air inlet one-way valve for dredging device.

[0018] In the utility model discloses a dredging device, it can also have such characteristics, wherein, one-way valve mounting hole is provided with the clamping portion compatible with the elastic clamping hook of air inlet fixed part, or the internal thread structure compatible with the outer thread structure of air inlet fixed part, or the limiting step portion compatible with the air inlet valve limiting portion of air inlet valve body.

[0019] The utility model discloses compared with prior art highlights and beneficial technical effects are:

[0020] According to the utility model discloses a kind of air inlet one-way valves, valve core installation cavity is provided with air inlet reset piece, air inlet reset piece preferably is spring, the outer diameter of spring and the inner diameter of valve core installation cavity are compatible, and located between air inlet valve cover and air inlet valve core, for providing the force that air inlet valve core seals air passage, realize the quick reset sealing of air inlet valve core, reduce the risk of leakage. When high-pressure gas in pumping cavity enters from air inlet passage, it opens air inlet valve core, and enters air inlet cavity by valve core installation cavity, when pumping cavity stops or resets, under the action of air inlet reset piece, air inlet valve core air seal portion is quickly reset and abuts on the end surface of air inlet passage, to realize quick sealing.

[0021] When it is installed in the one-way valve mounting hole of main mounting seat, the air inlet fixed part of air inlet valve body can be effectively fixed in one-way valve mounting hole, realize fixed connection, prevent air inlet one-way valve from falling off because of high pressure impact, simultaneously, the air inlet valve sealing portion of air inlet valve body can guarantee the installation sealing property of air inlet one-way valve, reduce the risk of leakage.

[0022] The utility model provides a kind of air inlet check valve, its air inlet fixed part is the end part of air inlet valve body of circumferential arrangement several elastic clamps or the outer thread structure being arranged in air inlet valve body outer side wall, it is respectively fixed by the clamping part or internal thread structure in check valve mounting hole, with simple structure, low in cost and the advantages such as. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic diagram of the dredger of the utility model.

[0024] Figure 2 It is the cross sectional view of the dredger of the utility model.

[0025] Figure 3 It is the cross sectional view of the inflator of the utility model.

[0026] Figure 4 It is the structure exploded view of the inflator of the utility model.

[0027] Figure 5 It is the cross sectional view of the air inlet check valve installation place of the utility model.

[0028] Figure 6 It is the structure schematic diagram of the air inlet check valve of the utility model.

[0029] Figure 7 It is the structure exploded view of the air inlet check valve of the utility model.

[0030] Meaning represented by reference numeral in the drawing:

[0031] Inflator 1, gas storage device 2, pressure display device 3, gas release control device 4, air inlet check valve 5,

[0032] Main piston 10, inflator 11, inflating cavity 111, inflating rod 12, rod body 121, inflating piston 122, limit block 123, inflating sealing ring 124, hand holding part 13, fixed seat 131, handle 132, limit hole 133, insertion hole 134, main mounting seat 14, air inlet cavity 141, inner ring wall 142, outer ring wall 143, link cavity 144, check valve mounting hole 145, clamping part 146, first guide inclined surface 1461, first clamping surface 1462, limit step part 147, gas release mounting seat 15, gas release cavity 151, gas release port 152, clamping groove 153, clamping convex point 154, pressure mounting seat 16, pressure cavity 161, pressure gas port 162, end cover 17, inner ring part 171, outer ring part 172, through hole 173, shell 18, notch 181,

[0033] 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,

[0034] Deflation button 41, deflation valve 42, deflation connecting rod 43,

[0035] Air inlet valve body 51, air inlet passage 511, valve core mounting cavity 512, valve cover mounting portion 513, L-shaped clamping groove 5131, second limiting convex point 5132, air inlet valve sealing portion 514, air inlet fixing portion 515, elastic clamping hook 5151, second guide inclined surface 5152, second clamping surface 5153, air inlet valve limiting portion 516, material reducing groove portion 517, air inlet valve cover 52, clamping block 521, first limiting convex point 522, air inlet valve core 53, air inlet guide portion 531, air inlet sealing portion 532, air inlet sealing ring 54, air inlet sealing washer 55, air inlet return member 56. DETAILED DESCRIPTION

[0036] The utility model will be described further in combination with specific embodiments:

[0037] It should be understood that the structure, proportion, size, etc. drawn in the drawings of the embodiments of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions that can be implemented by the present application, so they do not have substantial technical significance. Any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "inner" and "outer" used in the embodiments of the present application are only used for clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantial change of technical content, is also considered as the scope of the present application that can be implemented.

[0038] When an element is referred to as being "connected", "disposed", "mounted" to another element, it can be directly connected to the other element or indirectly connected or disposed or mounted to the other element through a middle element.

[0039] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. 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 scope of protection claimed by the present application.

[0040] Embodiment 1:

[0041] The air inlet one-way valve of the 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 structure and installation mode of the air inlet one-way valve are specifically described by taking the dredging device as an example.

[0042] 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.

[0043] 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, and 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 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 are respectively mounted in the gas release mounting base 15 and the pressure mounting base 16.

[0044] 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.

[0045] The pumping cylinder 11 and the main mounting base 14 can be separately arranged or integrally arranged. In the 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 is reduced, the sealing performance of the product is improved, and the air leakage risk of the pumping device during pumping is reduced.

[0046] The pumping cylinder 11 is hollow and contains the pumping cavity 111, one end of the pumping rod 12 is movably arranged in the pumping cavity 111, and the other end of the pumping rod 12 extends out of the pumping cylinder 11 and is provided with a hand holding part 13. The main mounting base 14 is located at the bottom of the pumping cylinder 11, is used for mounting the gas storage cylinder 21, is hollow and contains an air inlet cavity 141, and the main piston 10 is movably arranged in the air inlet cavity 141. In the embodiment, the axis of the pumping cavity 111 is coaxially arranged with the axis of the air inlet cavity 141.

[0047] The main mounting base 14 is provided with an inner ring wall 142 and an outer ring wall 143. The inner side of the inner ring wall 142 forms an air intake chamber 141. A one-way valve mounting hole 145 is provided between the air intake chamber 141 and the air pumping chamber 111. An air intake one-way valve 5 is installed in the one-way valve mounting hole 145. The gas in the air pumping chamber 141 pushes open the air intake one-way valve 5 and enters the air intake chamber 141 and the air storage chamber 24. The inner side of the outer ring wall 143 is provided with a mounting part for mounting the air storage cylinder 21. In this embodiment, the mounting part is internally threaded, and the air storage cylinder 21 is provided with a matching external thread. The air storage cylinder 21 and the main mounting base 14 are connected by threads. A connecting cavity 144 is formed between the inner ring wall 142 and the outer ring wall 143, connecting the interior of the air storage cylinder 21. The air inlet cavity 141 is connected to the connecting cavity 144. During operation, gas from the air pumping chamber 111 enters the air inlet cavity 141 through the air inlet check valve 5 when the air inlet check valve 5 is opened, and then enters the connecting cavity 144 (i.e., enters the air storage cavity of the air storage cylinder 21) through the gap between the air inlet cavity 141 and the main piston 10. During this process, the main piston 10 moves under the action of high-pressure gas until it blocks the air outlet pipe 22 inside the air storage cylinder 21.

[0048] 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. Therefore, the gas entering the air pumping chamber 141 through the air intake one-way valve 5 will simultaneously enter the air intake chamber 141 and the air storage chamber 24, and realize the storage of high-pressure gas.

[0049] like Figure 3 As shown, the venting control device 4 is installed on the main mounting base 14 and has a venting button 41, a venting valve 42, and a venting connecting rod 43. The venting button 41 is exposed and movably mounted on the outer casing 18 and is used to control the opening of the venting valve 42. The venting valve 42 is installed on the venting mounting base 15, which is integrally formed on the main mounting base 14. The venting connecting rod 43 is installed between the venting button 41 and the venting valve 42 and is used to link the venting button 41 and the venting valve 42. That is, by sliding the venting button 41, the venting connecting rod 43 opens the venting valve 42 to vent the gas.

[0050] 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 is formed with a deflation cavity 151 that is in communication with 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 formed with a deflation opening 152. When the deflation control device 4 is opened, the air inlet cavity 141 is in communication with 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 by 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.

[0051] The pressure mounting seat 16 is formed with a pressure cavity 161. The end of the pressure display device 3 is arranged on the pressure mounting seat 16. The pressure mounting seat 16 is formed with a pressure opening 162 that is in communication with 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 is formed with a gap 181 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.

[0052] 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.

[0053] 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 is formed with a through hole 173 for the inflator rod 12 to pass through. There is a gap between the inner wall of the through hole 173 and the inflator rod 12 for gas to enter. During inflating, the outside air enters the inflator cavity 111 through the gap. The inner wall of the outer ring portion 172 is formed with a connecting portion that is 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In the embodiment, the air inlet valve body 51 has an air inlet channel 511 and a valve core installation cavity 512 which are 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 for unidirectionally sealing the air inlet channel 511, i.e. unidirectionally sealing the inflation cavity of the inflator and the gas storage cavity of the gas storage device, so as to prevent the high-pressure gas in the gas storage cavity 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 < 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 piece or a plastic piece, and when it is a plastic piece, an air inlet sealing gasket 55 can be further arranged on the air inlet sealing part 532 of the air inlet valve core 53, so as to further improve the sealing performance of the air inlet valve core 53. The middle part of the air inlet valve cover 52 is hollow, and is arranged at one end of the air inlet valve body 51, and is used for preventing the air inlet valve core 53 from leaving the valve core installation cavity 512.

[0059] The air inlet valve core installation cavity is provided with an air inlet reset piece 56, which is preferably a spring. The outer diameter of the spring is matched with the inner diameter of the valve core installation cavity, and the spring is located between the air inlet valve cover 52 and the air inlet valve core 53, and is used for providing the force for the air inlet valve core to seal the air inlet channel, so as to realize the quick reset sealing of the air inlet valve core and reduce the risk of gas leakage.

[0060] When the high-pressure gas in the inflation cavity 111 enters from the air inlet channel 511, the air inlet valve core 53 is opened, and the high-pressure gas enters the air inlet cavity 141 through the valve core installation cavity 512. When the inflation cavity 111 stops or resets, the air inlet sealing part 532 of the air inlet valve core 53 is quickly reset and abuts against the end face of the air inlet channel 511 under the action of the air inlet reset piece 56, so as to realize the unidirectional sealing. In addition, the high-pressure gas in the air inlet cavity 141 can also further push the air inlet valve core 53 to quickly reset, so as to improve the inflation efficiency of the inflator.

[0061] As shown in FIG. 1, 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.

[0062] The intake valve cover 52 has a cover-like structure with a hollow center. At least one locking block 521 is provided on the inner wall. The valve cover mounting portion 513 has L-shaped slots 5131 corresponding to the locking blocks 521 around its perimeter. The L-shaped slots 5131 are formed by L-shaped protrusions. When the locking block 521 enters the corresponding L-shaped slot 5131, rotation engages the intake valve cover 52 and the intake valve body 51, thus fixing the axial position. A first limiting protrusion 522 is provided on the inner side of the locking block 521, and a second limiting protrusion 5132 is provided on the corresponding position on the inner wall of the L-shaped slot 5131. The interaction of the first and second limiting protrusions 522 limits the circumferential position of the intake valve cover 52.

[0063] In another embodiment, the intake valve cover 52 can be fixed to the valve cover mounting portion 513 by a threaded structure.

[0064] like Figure 5 As shown, the intake valve sealing part 514 is located in the middle of the intake valve body 51. The intake valve sealing part 514 can be tightly fitted with the side wall of the one-way valve mounting hole 145 to achieve a seal. Alternatively, a sealing groove can be provided on the intake valve sealing part 514, and an intake sealing ring 54 can be provided in the sealing groove. The intake sealing ring 54 can be tightly fitted with the side wall of the one-way valve mounting hole 145 to achieve a seal.

[0065] The intake fixing part 515 consists of several elastic hooks 5151 circumferentially arranged at the end of the intake valve body 51, and the intake valve limiting part 516 is a stepped surface provided at one end of the intake valve sealing part 514. The one-way valve mounting hole 145 is provided with a locking part 146 adapted to the elastic hooks 5151 of the intake fixing part 515 and a limiting step part 147 adapted to the intake valve limiting part 516 of the intake valve body 51. In this embodiment, the locking part 146 is an annular protrusion with a first guide slope 1461 and a first locking surface 1462. The locking end of the elastic hook 5151 has a second guide slope 5152 adapted to the first guide slope 1461 and a second locking surface 5153 adapted to the first locking surface 1462. When the intake check valve 5 is installed into the check valve mounting hole 145, the second guide slope 5152 of the elastic hook 5151 contacts the first guide slope 1461 of the locking part 146, causing the elastic hook 5151 to deform inward until the second locking surface 5153 of the elastic hook 5151 and the first locking surface 1462 of the locking part 146 engage with each other. At the same time, the intake valve limiting part 516 abuts against the limiting step part 147, thus fixing the intake valve body 51 in place. When the outlet end of the intake check valve is under high pressure (i.e., when the intake chamber is under high pressure), the high pressure causes the intake valve limiting part 516 to abut against the limiting step part 147, achieving a surface seal and further improving the sealing effect at the installation location.

[0066] In another embodiment, the intake valve core 53 is also provided with a material reduction groove 517 to reduce material costs.

[0067] like Figure 2 As shown, the gas storage device 2 is installed below the main mounting base 14 and has a gas storage cylinder 21. The gas storage cylinder 21 has a hollow cylindrical structure, with one end forming a gas storage mounting end 211 installed to the main mounting base 14, and the other end having a gas outlet 212. The middle part of the gas storage cylinder 21 has a gas outlet pipe 22, and a gas outlet chamber 23 communicating with the outside is opened in the gas outlet pipe 22. A gas storage chamber 24 is formed between the gas outlet pipe 22 and the inner wall of the gas storage cylinder 21. In this embodiment, the gas storage cylinder 21 is a steel structure. The gas storage cylinder 21 and the gas outlet pipe 22 are set separately. The bottom of the gas outlet pipe 22 is installed at the gas outlet 212 through the gas outlet mounting base 221 and the sealing gasket. The middle part is positioned in the gas storage cylinder 21 by the gas outlet pipe support frame 27. At the same time, a gas outlet nozzle 25 is fixedly installed at the gas outlet 212. The outer end of the gas outlet nozzle has a threaded structure or a quick-connect structure for connecting with the plug device.

[0068] The outer periphery of the gas storage mounting end 211 is provided with an external thread that matches the internal thread on the inner side of the outer ring wall 143 of the main mounting base 14. The gas storage mounting end 211 is connected to the outer ring wall 143 by the thread, 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. The top of the gas storage mounting end 211 rests on the gas storage sealing ring 28, so that the main mounting base 14 and the gas storage mounting end 211 are sealed together. The air outlet pipe 22 is a pipe with openings at both ends. A rubber ring 26 is fitted on the end of the air outlet pipe 22 away from the air outlet 212 (i.e., the air inlet end of the air outlet pipe 22). The rubber ring 26 is used to cooperate with the main piston 10. When air is pumped, the main piston 10 moves downward (i.e. moves towards the rubber ring 26) under the push of the gas from the air pumping chamber 111. It moves directly 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 pressed against the rubber ring 26, thereby sealing the air inlet end of the air outlet pipe 22 and isolating the connection between the air outlet chamber 23 and the air storage chamber 24. This allows the gas from the air pumping chamber 111 to enter the connecting chamber 144 and the air storage chamber 24 only through the air inlet chamber 141, thereby realizing the storage of gas in the air storage chamber 24.

[0069] In addition, the diameter of the side of the main piston 10 facing the rubber ring 26 (i.e. the working surface that is in contact with the rubber ring 26) is larger than the outer diameter of the rubber ring 26, so that during the venting process, the main piston 10 can be pushed back into the air inlet chamber 141 by the gas accumulated in the gas storage chamber 24. Once the main piston 10 leaves the rubber ring 26, the gas accumulated in the gas storage chamber 24 can be quickly released from the air outlet 25 through the air outlet pipe 22 to achieve high-pressure unblocking.

[0070] Example 2:

[0071] The embodiment is basically same as that of the embodiment 1, and the difference is that the spring positioning protrusions or the spring positioning recesses are arranged on the air inlet valve cover 52 and the air inlet sealing part 532 of the air inlet valve core, so as to realize the reliable installation of the air inlet reset member 56.

[0072] Embodiment 3:

[0073] The embodiment is basically same as that of the embodiment 1, and the difference is that the air inlet valve core is a steel ball and is movably arranged in the valve core installation cavity 512.

[0074] Embodiment 4:

[0075] The embodiment is basically same as that of the embodiment 1, and the difference is that the air inlet fixed part 515 is an external thread structure arranged on the outer side wall of the air inlet valve body 51, the one-way valve installation hole 145 is arranged with an internal thread structure matched with the external thread structure of the air inlet fixed part 515, and the air inlet one-way valve 5 is fixedly installed in the one-way valve installation hole 145 through the thread structures.

[0076] The above embodiments are only the preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. An air inlet check valve for a drain cleaner, installed between an air pump and an air reservoir of the drain cleaner, characterized in that, The utility model relates to a one-way valve for a dredging device, comprising: an air inlet valve body having an air inlet channel and communicating with an air inlet cavity of the air inlet device and an air storage cavity of the air storage device; an air inlet valve cover installed at one end of the air inlet valve body and forming a valve core installation cavity communicating with the air inlet channel together with the air inlet valve body; an air inlet valve core movably arranged in the valve core installation cavity or / and the air inlet channel for sealing the air inlet channel in one direction; and an air inlet reset member installed in the valve core installation cavity and used for providing a force for the air inlet valve core to seal the air inlet channel. The air inlet reset member is a spring installed between the air inlet valve core and the air inlet valve cover.

2. The air inlet check valve for a drain cleaner according to claim 1, wherein: The air inlet valve core has an air inlet guide part located in the air inlet channel and an air inlet sealing part located in the valve core installation cavity, and the outer diameter of the air inlet guide part is less than the inner diameter of the air inlet channel, the inner diameter of the air inlet channel is less than the outer diameter of the air inlet sealing part, and the outer diameter of the air inlet sealing part is less than the inner diameter of the valve core installation cavity.

3. The air inlet check valve for a drain cleaner according to claim 1 or 2, wherein: The air inlet reset member is a silica gel member or a plastic member, and an air inlet sealing gasket is further arranged on the air inlet sealing part of the plastic member.

4. The air inlet check valve for a drain cleaner of claim 3, wherein: The air inlet valve body has:

5. The inlet check valve for a drain cleaner of claim 1, wherein: a valve cover installation part used for installing the air inlet valve cover; an air inlet valve sealing part used for sealing the outer sidewall of the air inlet valve body; and an air inlet fixing part used for fixing the air inlet valve body; wherein the air inlet fixing part is a plurality of elastic clamping hooks circumferentially arranged at the end of the air inlet valve body or an external thread structure arranged on the outer sidewall of the air inlet valve body. The air inlet valve body further has an air inlet valve limiting part used for limiting the axial installation position of the air inlet valve body, and a sealing groove is formed in the air inlet valve sealing part and an air inlet sealing ring is arranged in the sealing groove.

6. The air inlet check valve for a drain cleaner of claim 5, wherein: The middle part of the air inlet valve cover is hollow, and the inner sidewall of the air inlet valve cover is provided with at least one clamping block, and the periphery of the valve cover installation part is provided with an L-shaped clamping groove corresponding to the clamping block, and when the clamping block enters the corresponding L-shaped clamping groove, the air inlet valve cover and the air inlet valve body are clamped by rotating.

7. A one-way inlet valve for a drain unblocker according to claim 5 or 6, wherein: The inner side of the clamping block is provided with a first limiting protrusion, and the inner wall of the L-shaped clamping groove is provided with a second limiting protrusion at the corresponding position, and the first limiting protrusion and the second limiting protrusion interact to limit the circumferential position of the air inlet valve cover.

8. The air inlet check valve for a drain cleaner of claim 7, wherein: The utility model relates to a one-way valve for a dredging device, comprising:

9. A drain opener comprising: a main installation seat having a one-way valve installation hole; an air inlet one-way valve installed in the one-way valve installation hole; an air inlet device having an air inlet cavity communicating with the air inlet end of the air inlet one-way valve; and an air storage device having an air storage cavity communicating with the air outlet end of the air inlet one-way valve; wherein the air inlet one-way valve is the air inlet one-way valve for a dredging device according to any one of claims 1-8. The one-way valve installation hole is provided with a clamping part matched with the elastic clamping hook of the air inlet fixing part, or an internal thread structure matched with the external thread structure of the air inlet fixing part, or a limiting step part matched with the air inlet valve limiting part of the air inlet valve body.

10. A drain cleaner as defined in claim 9 wherein: ​

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