CN217736367U - One-way valve and above-ground pool - Google Patents

Abstract

The application discloses a check valve and an above-ground pool. The check valve includes: the guide piece is arranged in the shell along the transverse direction of the shell, and a guide hole is formed in the guide piece. The inner space of the housing includes a first space and a second space which are located at both sides of the guide and communicate at least through the guide hole; the valve core assembly reciprocates along the axial direction of the shell and comprises a valve head and a valve rod connected with the valve head. The valve head is located in the second space and the valve stem extends through the guide bore into the first space. According to the check valve of the present application, the valve stem is held by the guide hole of the guide member in the axial direction of the housing during reciprocating conveyance, and the valve head is not deflected. Thus, when the one-way valve is in a cut-off state, the valve head and the shell keep good sealing contact, and water in the water pool body is prevented from flowing backwards through the one-way valve.

Description

One-way valve and above-ground water pool

Technical Field

The application relates to the field of inflatable products, in particular to a one-way valve. The application also relates to an above ground pool.

Background

With the improvement of living standard and the attention on health, hydrotherapy is in the life of people. Generally, a spa is a common device for performing hydrotherapy.

Typically, a spa includes a tank body for containing water and an inflation assembly in communication with the tank body. When hydrotherapy is carried out, air is introduced into the pool body through the air inflation assembly to form air bubbles in water, so that a massage effect is generated. However, after the inflation assembly in the prior art stops inflating, water in the tank body is easy to flow back into the inflation assembly, and even the inflation assembly is damaged.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problem, a first aspect of the present application provides a check valve. The check valve includes: a housing in which a guide is provided in a lateral direction of the housing, the guide having a guide hole formed therein; the inner space of the shell comprises a first space and a second space, wherein the first space and the second space are respectively positioned at two sides of the guide piece and are at least communicated through the guide hole; the valve core assembly reciprocates along the axial direction of the shell and comprises a valve head and a valve rod connected with the valve head, the valve head is positioned in the second space, and the valve rod extends through the guide hole to enter the first space; when the valve rod is at the first position, the valve head is in sealing contact with the shell, and the one-way valve is in a cut-off state; when the valve rod is at the second position, the valve head is separated from the shell, and the one-way valve is in a conducting state.

In one embodiment, the one-way valve further comprises a first driver mounted on the valve stem for driving the spool assembly to reciprocate in the axial direction of the housing.

In one embodiment, the first driver includes a first coil spring mounted on the valve stem and within the first space, the first coil spring having a first end engaged with the guide and a second end engaged with the valve stem.

In one embodiment, a retaining cap is provided at the end of the valve stem remote from the valve head, with the second end of the first helical spring engaging the retaining cap.

In one embodiment, the first drive member comprises a torsion spring having a first torsion arm mounted to the housing and a second torsion arm mounted to the valve stem.

In one embodiment, a jack is formed at the end of the valve rod far away from the valve head, the jack comprises a first extension along the axial direction of the shell and a second extension which is angled with the axial direction of the shell, and the first extension and the second extension are communicated; the second torque arm is mounted in the socket.

In one embodiment, the first extension and the second extension form an "L" shape.

In one embodiment, the number of torsion springs is two, and the torsion springs are arranged to face each other in the lateral direction of the housing.

In one embodiment, the guide is configured as a hollowed-out bracket mounted within the housing, with the guide hole being centered in the bracket.

In one embodiment, the valve head is configured as a concave body protruding toward the first space, the valve stem is connected at the center of the concave body, and the edge of the concave body is adapted to be in sealing contact with the side wall of the second space.

In one embodiment, the second space has a transverse dimension that gradually decreases in a direction toward the guide.

A second aspect of the present application provides an above ground water pool, comprising: a pool body, a port constructed on the pool body, a delivery assembly connected to the port for introducing fluid into the pool body, wherein the delivery assembly comprises a fluid source and a one-way valve as described above, the inlet of the one-way valve is connected to the fluid source, and the outlet is connected to the port.

In one embodiment, the number of the check valves is one or two, and two check valves are arranged in series.

In one embodiment, the delivery assembly further comprises a drain valve disposed between the one-way valve and the fluid source.

In one embodiment, a drain valve includes: a drain valve housing, on which a water outlet is formed; the drainage valve core comprises a sealing cover and a mandrel extending from the sealing cover, the sealing cover is positioned in the drainage valve shell and is suitable for covering the water outlet, and the mandrel extends out of the water outlet; the drain valve core is configured to reciprocate relative to the water outlet, and the sealing cover correspondingly closes or opens the water outlet.

Compared with the prior art, the beneficial effects of this application are as follows: in the check valve of the present application, the valve stem extends through a guide hole in the guide member. Therefore, the valve rod can be always kept along the axial direction of the shell by the guide hole without deflection when in reciprocating transportation, and the valve head can not deflect; under the cut-off state of the one-way valve, the valve head and the shell keep good sealing contact, and the backflow of water in the water pool body through the one-way valve is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 schematically illustrates an above ground pool according to one embodiment of the present application.

Figure 2 schematically illustrates a cross-sectional view of a first embodiment of the one-way valve of the above-ground pool.

Figure 3 schematically illustrates an exploded view of a first embodiment of the one-way valve of the above ground pool.

Figure 4 schematically illustrates a cross-sectional view of a second embodiment of the one-way valve of the above-ground pool.

Figure 5 schematically illustrates an exploded view of a second embodiment of the one-way valve of the above ground sink.

Figure 6 schematically illustrates a cross-sectional view of a first embodiment of the transport assembly for an above ground pool.

Figure 7 schematically illustrates a cross-sectional view of a second embodiment of the transport assembly for an above ground pool.

Figure 8 schematically illustrates a cross-sectional view of a third embodiment of the transport assembly for an above ground pool.

Figure 9 schematically illustrates an exploded view of a third embodiment of the above-ground pool transport assembly.

Figure 10 schematically illustrates a cross-sectional view of a fourth embodiment of the transport assembly for an above ground pool.

Figure 11 schematically illustrates an exploded view of a fourth embodiment of the transport assembly for an above ground pool.

Figure 12 schematically illustrates a cross-sectional view of a fifth embodiment of the transport assembly for an above ground pool.

Figure 13 schematically illustrates a cross-sectional view of a sixth embodiment of the transport assembly for an above ground pool.

Figure 14 schematically illustrates an exploded view of a sixth embodiment of the transport assembly for an above ground pool.

Figure 15 schematically illustrates a perspective view of the drain valve of the transport assembly of the above ground pond.

Figure 16 schematically illustrates a cross-sectional view of the drain valve of the above-ground pool's transport assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Figure 1 schematically illustrates an above ground pool 1 according to one embodiment of the present application. As shown in FIG. 1, the above ground pool 1 includes a pool body 100, with an interface constructed on the pool body 100; also included is a transfer assembly 200 connected to the interface, the transfer assembly 200 being used to introduce fluid into the sump body 100.

The sump body 100 may contain water and function as a SPA sump. Although the pool body 100 shown in fig. 1 has a rectangular parallelepiped shape, it should be understood that the pool body 100 may have other shapes, such as a hemispherical shape, a semi-ellipsoidal shape, etc., and the description thereof is omitted. The transfer assembly 200 can be used to inject water or other fluid into the sump body 100, and can also be used to introduce air into the water in the sump body 100 to form bubbles in the water, thereby generating a massage effect. Hereinafter, the air delivery by the delivery assembly 200 will be described as an example.

Fig. 6 schematically shows the structure of a first embodiment of the delivery assembly 200. As shown in FIG. 6, the delivery assembly 200 includes a fluid source 201 and a one-way valve 300, with an inlet 351 of the one-way valve 300 connected to the fluid source 201 and an outlet 352 connected to the interface. It will be appreciated that where the delivery assembly 200 delivers air, the fluid source 201 is an air source, and may be, for example, an air pump. Air pumps are well known to those skilled in the art and will not be described in detail herein. The arrows B in fig. 6 illustrate the flow path of air in the delivery assembly 200. As shown in fig. 6, air flows from the air pump, through the inlet 351 and the outlet 352 of the check valve 300, and into the sump body 100. The check valve 300 serves to prevent water in the sump body 100 from flowing backward to the air pump after stopping the air inflation of the sump body 100. In the present application, the directional terms "upstream" and "downstream" are used with reference to the direction of gas flow.

The structure of the check valve 300 will be described below.

Fig. 2 schematically shows the structure of a first embodiment of a check valve 300. Fig. 3 is an exploded view of a first embodiment of a one-way valve 300. As shown in fig. 2 and 3, the check valve 300 includes a housing 303, and a guide 310 is provided in the housing 303 in a lateral direction of the housing 303. The housing 303 may be in the form of a rotary body, and pass through in the axial direction; in this structure, the guide 310 is disposed in the radial direction of the housing 303. The inner space of the housing 303 includes a first space 301 and a second space 302. The first space 301 and the second space 302 are on both sides of the guide 310. For example, the first space 301 is upstream and the second space 302 is downstream. A guide hole 311 is configured on the guide 310, and the first space 301 and the second space 302 communicate at least through the guide hole 311. In addition, check valve 300 also includes a valve cartridge assembly 320 disposed within housing 303. The valve core assembly 320 comprises a valve head 322 and a valve rod 321 connected with the valve head 322, the valve head 322 is positioned in the second space 302, and the valve rod 321 extends through the guide hole 311 into the first space 301. The spool assembly 320 is configured to reciprocate in the axial direction of the housing 303 (as indicated by the double-headed arrow a in fig. 2). Specifically, when the valve stem 321 is in the first position, the valve head 322 is in sealing contact with the housing 303, and the check valve 300 is in a blocking state; when the valve stem 321 is in the second position, the valve head 322 is separated from the housing 303 and the check valve 300 is in the open state. The second location is downstream of the first location.

In the check valve 300 of the present application, the valve stem 321 extends through the guide hole 311 of the guide 310, and the valve stem 321 does not leave the guide hole 311 when the spool assembly 320 reciprocates. Thus, when the check valve 300 is used, the stem 321 is always held by the guide hole 311 in the axial direction of the housing 303 without being deflected, and the head 322 is always held in the axial direction of the housing 303 without being deflected. Thus, in the blocking state of the check valve 300, a good sealing contact of the valve head 322 with the sidewall of the second space 302 is ensured, and the water in the sump body 100 is prevented from flowing backward through the check valve 300, even causing damage to the air pump upstream of the check valve 300.

As also shown in fig. 2, the valve head 322 is configured as a concave sheet that projects toward the first space 301. The stem 321 is attached in the center of the concave body, the edge of which is used to sealingly engage with the side wall of the second space 302. The valve head 322 is generally bowl-shaped as a whole, with the bowl bottom oriented towards the first space 301; the valve stem 321 is mounted at the bottom of the bowl. With this structure, the contact area of the valve head 322 with the side wall of the second space 302 is large, which contributes to an improvement in the sealing effect.

Alternatively, the transverse dimension of the second space 302 is gradually smaller in a direction toward the guide 310 (i.e., a direction from downstream to upstream). Thus, the check valve 300 is configured such that its initial state may be a shut-off state. The conducting state of the check valve 300 may be achieved by: as the gas pressure in the first space 301 increases, the valve head 322 moves downstream under the influence of the gas pressure and gradually separates from the side wall of the second space 302, and the gas flows downstream from the first space 301 through the gap between the valve head 322 and the side wall of the second space 302. In this case, the valve stem 321 is also moved downstream (i.e., from the first position to the second position) by the valve head 322, but does not disengage from the guide hole 311. The tapering of the lateral dimension of the second volume 302 causes the greater the pressure in the space downstream of the valve head 322 (e.g., the water pressure back into the second volume 302), the more the valve head 322 is driven toward the upstream movement, the better the valve head 322 seals against the side wall of the second volume 302, further helping to prevent water back flow through the one-way valve 300. In addition, the area of the valve head 322 in the form of a concave disk is larger, and the pressure applied to the valve head 322 is larger under the same pressure, which also helps to improve the sealing effect of the valve head 322 and the side wall of the second space 302.

In particular, as shown in fig. 3, the valve head 322 may comprise a rigid body 323 in the form of a concave surface provided with a form-fitting gasket 324 on the upstream surface of the body 323 (i.e. the surface facing the first space 301). In this case, the stem 321 is connected to the body 323 through the packing 324. The gasket 324 is adapted to be in sealing contact with a sidewall of the second space 302.

As also shown in fig. 3, the guide 310 is configured as a hollowed-out bracket mounted within the housing 303 with the guide hole 311 in the center of the bracket. Thus, the high pressure gas from the gas source can smoothly pass through the guide member 310, greatly reducing the resistance to the flow of the gas, and helping to generate desired bubbles in the water of the sump body 100 for a good massage effect. Alternatively, the guide 310 is configured in a cross shape, and the guide holes 311 are at the crossing points.

As also shown in fig. 2 and 3, the check valve 300 further includes a first driver mounted on the valve stem 321 for driving the spool assembly 320 to reciprocate in the axial direction a of the housing 303. According to this configuration, the first driving member is also located within the housing 303, which improves the compactness of the check valve 300 and facilitates the installation of the check valve 300. In addition, the housing 303 also protects the first driving member, and prevents the first driving member from being damaged by the influence of the external environment.

Alternatively, as shown in fig. 2 and 3, the first driver includes a first coil spring 331 installed on the valve stem 321 and in the first space 301. The first coil spring 331 has a first end engaged with the guide 310 and a second end engaged with the stem 321. Thus, the first coil spring 331 can be easily inserted into the valve stem 321, simplifying the assembly of the check valve 300. In addition, the opening pressure of the check valve 300 can be adjusted by adjusting the stiffness coefficient of the first coil spring 331 to meet different requirements. It should be understood that, in this case, in the initial state of the check valve 300 (i.e., the shut-off state of the check valve 300), the first coil spring 331 is extended. In the conducting state of the check valve 300, the first coil spring 331 is compressed as the valve head 322 and the valve stem 321 move toward the downstream. After the air supply is stopped, the first coil spring 331 is expanded again, the valve stem 321 moves upstream to be reset, the valve head 322 moves upstream to be reset under the driving of the valve stem 321, and the one-way valve 300 returns to the initial state (or the stop state).

Alternatively, a recess 312 is provided on the guide 310 around the guide hole 311, and a first end of the first coil spring 331 is engaged into the recess 312. In this way, the recess 312 plays a role of assisting positioning of the first coil spring 331 to maintain stability of the first coil spring 331.

As also shown in fig. 2 or 3, a retaining cap 325 is provided at the end of the valve stem 321 remote from the valve head 322, and a second end of the first coil spring 331 engages with the retaining cap 325. Optionally, a fixing cap 325 is detachably mounted on the valve stem 321, which facilitates maintenance, replacement, and fixing of the first coil spring 331.

Fig. 4 and 5 schematically show a one-way valve 300 of a second embodiment. The check valve 300 of the second embodiment is similar in structure to the check valve 300 of the first embodiment, differing only in the first driver. For simplicity, only the differences in the check valve 300 are described below.

In the check valve 300 of the second embodiment, the first driving member includes a torsion spring 340, a first torsion arm 341 of the torsion spring 340 is mounted on the housing 303, and a second torsion arm 342 is mounted on the stem 321.

Alternatively, the torsion springs 340 are two in number and are disposed diametrically opposite in the lateral direction of the housing 303. Thus, the two torsion springs 340 not only provide a restoring driving force to the stem 321, but also balance the stem 321 against tilting due to pressure fluctuations. It should also be understood that the number of torsion springs 340 may also be larger, and that a plurality of torsion springs 340 are evenly distributed along the circumference of the first space 301 to balance the valve stem 321.

As also shown in fig. 4, a socket 326 is configured at the end of the valve stem 321 remote from the valve head 322. The receptacle 326 includes a first extension 327 along the axial direction of the housing 303 and a second extension 328 extending at an angle to the axial direction of the housing 303, the first extension 327 and the second extension 328 communicating; second torque arm 342 is mounted in receptacle 326. Optionally, the end of second torque arm 342 is configured as a hook 343, and hook 343 is inserted into second extension 328. With this structure, when the torsion spring 340 is assembled to the valve stem 321, the hook 343 can be inserted into the first extension portion 327 along the axial direction first, and then the torsion spring 340 is pulled, so that the hook 343 can enter the second extension portion 328, which greatly facilitates the assembly of the torsion spring 340.

In an alternative embodiment, the first extension 327 and the second extension 328 form a general "L" shape. Thus, the first extension 327 forms an angle of 90 degrees with the second extension 328. In this way, the hook 343 is prevented from slipping off the second extension 328, facilitating the use of the check valve 300.

Alternatively, a structure similar to that of receptacle 326 may be configured on housing 303, and a structure similar to that of hook 343 may be configured at the end of first torsion arm 314, which will not be described herein for simplicity.

In the delivery assembly 200, the number of the check valves 300 is one or two. In the case where two check valves 300 are provided, the two check valves 300 are provided in series. For example, in the embodiment shown in FIG. 6, a first embodiment of the check valve 300 is provided in the delivery assembly 200. In the embodiment shown in fig. 7, a second embodiment of a one-way valve 300 is provided in the delivery assembly 200. An embodiment in which two one-way valves 300 are provided is schematically shown in fig. 8 to 14. In the embodiment in which two check valves are provided, the first drivers of the two check valves 300 may be both the first coil spring 331 (i.e., the check valve of the first embodiment) as shown in fig. 8 and 9, may be both the torsion spring 340 (i.e., the check valve of the second embodiment) as shown in fig. 13 and 14, or may be used in combination of the check valve of the first embodiment and the check valve of the second embodiment as shown in fig. 10 to 12. In other embodiments, more one-way valves may be provided, which are used in series. In the case where two or more check valves 300 are used in series, the first space of the check valve 300 located downstream is joined together with the second space of the check valve 300 located upstream.

The delivery assembly 200 further includes a drain valve 202 disposed between the one-way valve 300 and the fluid source 201. Thus, when water is present in the delivery assembly 200, the water can be discharged through the drain valve 202 to prevent water from entering the air pump and causing damage to the air pump.

Fig. 15 and 16 show a detailed structure of the drain valve 202, and the drain valve 202 includes: a drain valve housing 210, on which the water outlet 212 is constructed; a drain valve core 220, wherein the drain valve core 220 comprises a cover 221 and a mandrel 222 extending from the cover 221, the cover 221 is positioned in the drain valve shell 210 and is suitable for covering the water outlet 212, and the mandrel 222 extends out of the water outlet 212. The drain valve core 220 is configured to reciprocate with respect to the water outlet 212, and the cap 221 closes or opens the water outlet 212, respectively. For example, in the initial state of the drain valve 202, the cover 221 is separated from the water outlet 212 (i.e., the drain valve 202 is in an open state), at which time water, if any, within the delivery assembly 200 may be discharged from the water outlet 212; when the delivery assembly 200 is used for delivering gas, the cover 221 moves towards the water outlet 212 until the cover 221 seals the water outlet 212, and the water outlet 212 is closed to avoid gas leakage; when the gas delivery is stopped, the cover 221 moves away from the water outlet 212, the water outlet 212 is opened again, and the drain valve 202 returns to the initial state.

The water outlet 212 may be at the lowest position of the drain valve housing 210 in the vertical direction, so that water can automatically flow out from the water outlet 212 to achieve water drainage. In other embodiments, the water outlet 212 may also be located on a side wall of the drain valve housing 210 so that water may be drained by a water pumping device.

A support bracket 211 is mounted on an outer wall of the drain valve housing 210 corresponding to the water outlet 212, and a guide hole 213 corresponding to the water outlet 212 is configured on the support bracket 211. In this case, the spindle 222 extends through the guide hole 213. The stem 222 is not separated from the guide hole 213 during the reciprocating motion of the drain spool 220. Thus, the guide hole 213 ensures that the stem 222 is not deflected, thereby ensuring that the cover 221 can cover the water outlet 212 or be separated from the water outlet 212. Alternatively, the support bracket 211 is integrally formed with the drain valve housing 210, which reduces the number of parts of the drain valve 202, thereby simplifying the assembly of the drain valve 202. The support frame 211 may be constructed in an openwork form to facilitate drainage.

A second coil spring 224 is mounted on the stem 222, one end of the second coil spring 224 is engaged with the cover 221, and the other end of the second coil spring 224 is engaged with the support bracket 211. Thus, the second coil spring 224 may drive the drain spool 220 to reciprocate. For example, in the initial state of the drain valve 202, the second coil spring 224 is extended to lift the cap 221 away from the water outlet 212. When gas is delivered, the gas pressure in the drain valve 202 increases, and the whole drain valve core 220 moves to the outside of the drain valve 202 due to the cover 221 of the drain valve core under the action of the gas pressure until the cover 221 covers the water outlet 212; during this time, the second coil spring 224 is compressed. After the gas supply is stopped, the gas pressure is reduced, the second coil spring 224 is expanded to push the cap 221 toward the inside of the drain valve 202, the cap 221 is separated from the water outlet 212, and the drain valve 202 returns to its initial state.

In one embodiment, the cap 221 may be disc-shaped and have a diameter greater than the diameter of the outlet 212. When gas is conveyed, the gas pressure on the sealing cover 221 of the drain valve core 220 is larger, so that the drain valve core 220 can automatically and quickly move to the outside of the drain valve 202 and close the water outlet 212 without the assistance of other parts or extra operation of a user, and the use of the user is facilitated.

As also shown in fig. 15 and 16, a stopper 225 is mounted on an end 226 of the stem 222 outside the guide hole 213. During reciprocation of the drain spool 220, the stopper 225 may prevent the stem 222 from disengaging from the guide hole 213. A buffer 223 is provided between the stopper 225 and the support bracket 211. The buffer member 223 prevents the stopper 225 from violently striking the buffer member 223 to generate noise when the drain valve cartridge 220 reciprocates, thereby improving the user's feeling. In an alternative embodiment, the buffer 223 is a rubber ring that fits over the mandrel 222.

The operation of the air delivery by the delivery assembly is described below with reference to fig. 6.

In the initial state of the delivery assembly 200, the drain valve 202 is in the open state, the second coil spring 224 is extended, and the cap 221 is separated from the water outlet 212. The check valve 300 is in a blocking state, the first coil spring 331 is expanded, and the valve head 322 is in sealing contact with the side wall of the second space 302.

When the delivery assembly 200 delivers air, the cover 221 of the drain valve 202 is pressed to move the drain valve core 220 away from the drain valve housing 210 until the cover 221 covers and seals the water outlet 212. The second coil spring 224 is compressed at this time. The valve head 322 of the check valve 300 is moved toward the downstream by the pressure from the upstream air (note that the spool assembly 320 is moved toward the downstream as a whole) to be separated from the side wall of the second space 302, the first coil spring 331 is compressed, and the air flows through the check valve 300 and can flow further downstream.

After the delivery assembly 200 stops delivering air, the cap 221 is no longer subjected to air pressure, the second coil spring 224 expands to separate the cap 221 from the outlet 212, and the drain valve 202 returns to its open state. At the same time, the first coil spring 331 expands, pulling the valve head 322 of the check valve 300 upstream and into sealing contact again with the side wall of the second space 302, and the check valve 300 returns to its off-state.

The operation of the conveyor assembly shown in fig. 7 to 14 is similar to that of fig. 6 and will not be described again.

It will be appreciated that the check valve 300 described in the embodiments above can be used not only to control the flow of air in a single direction, but also to control the flow of water or other fluids in a single direction. For example, when applied to an above ground sink 1, for controlling the unidirectional flow of air or water or other fluid to the sink body 100 of the above ground sink 1.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (15)

1. A check valve, comprising:

a housing (303), wherein a guide (310) is arranged in the housing (303) along the transverse direction of the housing (303), and a guide hole (311) is formed on the guide (310); the inner space of the housing (303) comprises a first space (301) and a second space (302), the first space (301) and the second space (302) are respectively positioned at two sides of the guide (310) and are communicated at least through the guide hole (311);

a valve core assembly (320) which reciprocates along the axial direction of the shell (303) and comprises a valve head (322) and a valve rod (321) connected with the valve head (322), wherein the valve head (322) is positioned in the second space (302), and the valve rod (321) extends through the guide hole (311) into the first space (301);

when the valve rod (321) is at a first position, the valve head (322) is in sealing contact with the shell (303), and the one-way valve is in a cut-off state;

when the valve rod (321) is at the second position, the valve head (322) is separated from the shell (303), and the one-way valve is in a conducting state.

2. The check valve of claim 1, further comprising a first driver mounted on the valve stem (321) for driving the spool assembly (320) to reciprocate axially along the housing (303).

3. A one-way valve according to claim 2, wherein the first driver comprises a first helical spring (331) mounted on the valve stem (321) and within the first space (301), the first helical spring (331) having a first end engaged with the guide (310) and a second end engaged with the valve stem (321).

4. A one-way valve according to claim 3, wherein a retaining cap (325) is provided at the end of the valve stem (321) remote from the valve head (322), the second end of the first helical spring (331) engaging with the retaining cap (325).

5. A one-way valve according to claim 2, wherein the first drive member comprises a torsion spring (340), a first torsion arm (341) of the torsion spring (340) being mounted on the housing (303), and a second torsion arm (342) being mounted on the valve stem (321).

6. The one-way valve according to claim 5, characterized in that at the end of the valve stem (321) remote from the valve head (322) a socket (326) is configured, the socket (326) comprising a first extension (327) in the axial direction of the housing (303) and a second extension (328) angled to the axial direction of the housing (303), the first extension (327) and the second extension (328) communicating; the second torque arm (342) is mounted in the receptacle (326).

7. The check valve of claim 6, wherein the first extension (327) and the second extension (328) form an "L" shape.

8. A one-way valve according to any one of claims 5 to 7, wherein the torsion springs (340) are two in number and are diametrically disposed in the transverse direction of the housing (303).

9. The non-return valve according to claim 1, characterized in that the guide (310) is configured as a hollowed-out bracket mounted within the housing (303), the guide hole (311) being in the center of the bracket.

10. The non-return valve according to claim 1, characterized in that the valve head (322) is configured as a concave blade projecting towards the first space (301), the valve stem (321) being connected in the centre of the concave blade, the edge of the concave blade being adapted to be in sealing contact with the side wall of the second space (302).

11. A one-way valve according to claim 10, wherein the transverse dimension of the second space (302) is tapered in a direction towards the guide (310).

12. An above-ground pool, comprising:

a sump body (100) on which an interface is constructed,

a delivery assembly (200) connected to the interface, the delivery assembly (200) being adapted to introduce fluid into the sump body (100),

wherein the delivery assembly (200) comprises a fluid source (201) and a one-way valve (300) according to any one of claims 1 to 11, an inlet (351) of the one-way valve (300) being connected to the fluid source (201) and an outlet (352) being connected to the interface.

13. An above-ground pool according to claim 12 wherein the number of one-way valves (300) is two, two of the one-way valves (300) being arranged in series.

14. An above-ground pool according to claim 12 or 13, wherein the delivery assembly (200) further comprises a drain valve (202) disposed between the one-way valve (300) and the fluid source (201).

15. An above-ground pool according to claim 14, wherein the drain valve (202) comprises:

a drain valve housing (210), on which drain valve housing (210) a water outlet (212) is configured;

a drain valve cartridge (220), said drain valve cartridge (220) comprising a cover (221) and a mandrel (222) extending from said cover (221), said cover (221) being within said drain valve housing (210) and adapted to cover said water outlet (212), said mandrel (222) extending beyond said water outlet (212);

the drain valve core (220) is configured to reciprocate relative to the water outlet (212), and the cover (221) closes or opens the water outlet (212) correspondingly.

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