A lift check valve for an aquarium

Abstract

The utility model relates to a kind of lift check valves for fish tank, it includes: straight-through valve body;Two live joints, are located in the both ends of the straight-through valve body;Check valve assembly is located in the inside of the straight-through valve body, including valve seat, valve core and support frame, the valve seat is sealed with the end of one live joint Cooperation, the valve core is sealed with the valve seat Cooperation, and the valve core is slidably matched with the support frame;The support frame is located on the valve seat, the side wall of the support frame is uniformly provided with at least four muscle strips, and opening is formed between adjacent two muscle strips;The muscle strip is used to limit the displacement of the valve core.The utility model relates to a kind of lift check valves for fish tank with good anti-blocking performance.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a lift check valve for a fish tank. Background Technology

[0002] A check valve is a valve that automatically prevents the backflow of fluid. It relies on fluid pressure or gravity to open or close the valve core, requiring no manual intervention or external power supply. The internal structure of a check valve is specially designed to allow fluid to flow only from the inlet to the outlet. When fluid attempts to flow in the opposite direction, the valve core quickly closes under the influence of fluid gravity, elasticity, or reverse pressure, forming an effective seal and preventing backflow. Therefore, check valves are widely used in various scenarios where backflow prevention is necessary. For example, installing a check valve at the outlet of a water pump can prevent backflow of water when the pump stops, which could impact the impeller and cause pump damage. Applying a check valve to an aquarium circulation system can prevent backflow of water in pipes and filters due to siphon action when power is lost or equipment is shut down, thus preventing abnormal drops in aquarium water levels or backflow of wastewater from the filtration system contaminating the main aquarium water, ensuring the safe operation of the entire aquarium system and the stability of the aquatic ecosystem.

[0003] Chinese patent CN222142087U discloses a check valve for aquariums. Its basic structure includes a straight-through valve body, a pipe fitting connected to the straight-through valve body via a union, and a check valve assembly disposed within the straight-through valve body. The check valve assembly includes a check valve body, which comprises a main body, a cylindrical hollow support, and a check valve core disposed within the check valve body. The check valve core has an upper column and a lower column at its two ends. The upper column slides through a second annular support at the top of the cylindrical hollow support, and the lower column slides through a first annular support in the main body. This solution discloses a check valve for aquariums that allows the check valve core to perform stable check valve movement within the straight-through valve body without displacement.

[0004] The check valve with the above structure restricts the axial displacement of the check valve core by having the upper and lower columns slide through two annular supports respectively. However, the annular fit gap between the upper and lower columns and the annular supports is easily invaded and accumulated by impurities such as algae and particles in the water during operation, which poses a high risk of jamming during long-term use, thus causing the check valve to fail. Utility Model Content

[0005] The purpose of this invention is to provide a lifting check valve for aquariums to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0007] This utility model provides a lifting check valve for a fish tank, comprising: Straight-through valve body; Two unions are located at both ends of the straight-through valve body; A check valve assembly, located inside the straight-through valve body, includes a valve seat, a valve core, and a support frame. The valve seat is in a sealing fit with the end of one of the live joints, the valve core is in a sealing fit with the valve seat, and the valve core is in a sliding fit with the support frame. The support frame is mounted on the valve seat, and at least four ribs are evenly arranged on the side wall of the support frame, with an opening formed between two adjacent ribs; the ribs are used to limit the displacement of the valve core.

[0008] In some embodiments of this application, the support frame is a cage-shaped support frame, and a guide cylinder is provided at the top center of the cage-shaped support frame. The guide cylinder has an inner cavity that runs vertically through the top and bottom. The top of the valve core slides through the guide cylinder.

[0009] In some embodiments of this application, the valve core includes a guide portion and a positioning portion, the guide portion extending upward and slidingly passing through the guide cylinder; the check valve assembly further includes an elastic element, the elastic element being sleeved on the outer periphery of the guide portion, and the top of the elastic element abutting against the bottom of the guide cylinder, and the bottom of the elastic element abutting against the positioning portion.

[0010] In some embodiments of this application, the check valve assembly further includes a first sealing ring; the bottom of the valve core is provided with a first sealing groove, the first sealing ring is disposed in the first sealing groove, and the valve core is sealed to the top of the valve seat through the first sealing ring.

[0011] In some embodiments of this application, the side wall of the support frame is further provided with at least one locking block, and the inside of the straight-through valve body is provided with at least one corresponding locking groove. The shapes of the locking block and the locking groove are adapted to each other. The check valve assembly is engaged with the inside of the straight-through valve body through the locking block and the locking groove.

[0012] In some embodiments of this application, the union is detachably connected to both ends of the straight-through valve body; the union includes a pipe fitting and a union sleeve, and the pipe fitting is detachably connected to both ends of the straight-through valve body through the union sleeve.

[0013] In some embodiments of this application, a second sealing ring and a third sealing ring are also included; the valve seat and one of the pipe joints are sealed together by the second sealing ring, and the top of the straight-through valve body is sealed together with another pipe joint by the third sealing ring.

[0014] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects: Compared with existing technologies, the lifting check valve for aquariums of this invention significantly reduces the risk of valve core jamming. Specifically, the lifting check valve for aquariums of this invention restricts the displacement of the valve core through at least four ribs evenly distributed circumferentially on the side wall of the support frame. These ribs, on the one hand, radially restrict the movement of the valve core, preventing radial offset and ensuring the coaxiality of the valve core's movement; on the other hand, the axial movement stroke of the valve core is limited within the axial space formed by the ribs and the valve seat, eliminating the need for a separate sliding fit at the bottom of the valve core to restrict its axial displacement. Furthermore, since an opening is formed between adjacent ribs, impurities in the water flow are unlikely to accumulate in the valve core's movement path. Further, the top of the valve core slides through the guide cylinder, while the bottom of the valve core is sealed to the top of the valve seat. Thus, during the entire movement of the valve core, only the fit between the top of the valve core and the guide cylinder presents a guide gap where sand, particles, etc., carried by the water flow can easily intrude. Compared to the existing two-point sliding structure of the upper and lower columns and the ring bracket, this utility model reduces the potential blockage risk point from two to one, thereby significantly reducing the risk of valve core jamming due to impurity accumulation, which in turn leads to the failure of the entire check valve. Attached Figure Description

[0015] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein: Figure 1 This is a cross-sectional view of a lifting check valve for a fish tank according to the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the check valve assembly of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of a lifting check valve for a fish tank according to the present invention.

[0018] The annotations in the attached figures are explained as follows: 1. Straight-through valve body; 11. Slot; 12. Third sealing groove; 2. Union; 21. Pipe fitting; 22. Union sleeve; 3. Check valve assembly; 31. Valve seat; 311. Second sealing groove; 32. Valve core; 321. Guide part; 322. Annular groove; 323. First sealing groove; 33. Support frame; 331. Rib; 332. Guide cylinder; 333. Locking block; 34. Elastic element; 35. First sealing ring. Detailed Implementation

[0019] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0020] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0021] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the positional descriptions of these elements change, these directional indications also change accordingly.

[0022] Please see Figures 1 to 3 The lifting check valve for a fish tank provided in one embodiment of this utility model mainly includes a straight valve body 1, two unions 2 and a check valve assembly 3.

[0023] The two live joints 2 are located at both ends of the straight-through valve body 1.

[0024] The check valve assembly 3, located inside the straight-through valve body 1, includes a valve seat 31, a valve core 32, and a support frame 33. The valve seat 31 is sealed to the end of a union 2, the valve core 32 is sealed to the valve seat 31, and the valve core 32 is slidably fitted to the support frame 33. The support frame 33 is mounted on the valve seat 31, and at least four ribs 331 are evenly distributed circumferentially on the side wall of the support frame 33, with an opening formed between two adjacent ribs 331. The ribs 331 are used to restrict the displacement of the valve core 32.

[0025] The aquarium lift check valve of this invention restricts the displacement of the valve core 32 through at least four ribs 331 evenly distributed circumferentially on the side wall of the support frame 33. These ribs 331, on the one hand, radially restrict the movement of the valve core 32, preventing radial offset and ensuring the coaxiality of its movement; on the other hand, the axial travel of the valve core 32 is limited within the axial space formed by the ribs 331 and the valve seat 31, eliminating the need for a separate sliding fit at the bottom of the valve core 32 to restrict its axial displacement. Furthermore, because an opening is formed between adjacent ribs 331, impurities in the water flow are unlikely to accumulate along the movement path of the valve core 32. Thus, the check valve of this invention eliminates the sliding fit at the bottom of the valve core 32, avoiding the formation of easily clogged gaps. The open support frame 33 also avoids the risk of the valve core 32 becoming stuck due to impurity accumulation, leading to check valve failure.

[0026] It is understood that the number of ribs 331 can be 4, 5, 6, etc. In this embodiment, the number of ribs 331 is 4. The four circumferentially distributed ribs 331 on the side wall of the support frame 33 are symmetrical in pairs in the radial plane where the valve core 32 is located, forming a pair of opposing forces in two mutually perpendicular directions. This causes the valve core 32 to be subjected to four balanced constraint forces from two directions, thereby constraining the radial displacement and slight rotation of the valve core 32, and thus ensuring the coaxiality of the movement of the valve core 32.

[0027] In a preferred embodiment, the support frame 33 is a cage-shaped support frame 33, and a guide cylinder 332 is provided at the top center of the cage-shaped support frame 33. The guide cylinder 332 has an inner cavity that runs vertically through the top and bottom. The top of the valve core 32 is slidably inserted into the guide cylinder 332.

[0028] The valve core 32 slides through the guide cylinder 332 at its top, while its bottom seals against the top of the valve seat 31. Therefore, during the entire movement of the valve core 32, only the area where its top meets the guide cylinder 332 presents a guide gap, making it susceptible to intrusion by sand, particles, etc., carried by the water flow. This design reduces potential blockage points in the check valve structure, significantly lowering the risk of the valve core 32 becoming stuck due to impurities, thus preventing the entire check valve from failing.

[0029] Preferably, the cage-shaped support frame 33 is a birdcage-shaped support frame 33. Specifically, each of the ribs 331 is an L-shaped rib 331, with the longitudinal segment of each L-shaped rib 331 extending upward and the transverse segment of each L-shaped rib 331 extending laterally and connecting to the outer wall of the guide cylinder 332. By providing the cage-shaped support frame 33 with L-shaped ribs 331, the radial displacement of the valve core 32 is restricted within the radial plane enclosed by the longitudinal segments of the L-shaped ribs 331, while the transverse segment of the L-shaped ribs 331 and the valve seat 31 together define the axial movement range of the valve core 32.

[0030] In a preferred embodiment, the valve core 32 includes a guide portion 321 and a positioning portion. The guide portion 321 extends upward and slides through the guide cylinder 332. The check valve assembly 3 further includes an elastic element 34, which is sleeved on the outer periphery of the guide portion 321. The top of the elastic element 34 abuts against the bottom of the guide cylinder 332, and the bottom of the elastic element 34 abuts against the positioning portion. The elastic element 34 can generate a rebound force under fluid pressure, causing the valve core 32 to seal against the valve seat 31, thereby improving the check valve effect of this invention. It is understood that the elastic element 34 includes, but is not limited to, a spring.

[0031] In a preferred embodiment, the positioning portion is an annular groove 322 surrounding the outer periphery of the guide portion 321; one end of the elastic member 34 abuts against the bottom of the guide cylinder 332, and the other end is located within and abuts against the annular groove 322. Thus, one end of the elastic member 34 is confined within the annular groove 322, thereby preventing the elastic member 34 from dislodging from the guide portion 321 during the movement of the valve core 32.

[0032] In a preferred embodiment, the check valve assembly 3 further includes a first sealing ring 35; the bottom of the valve core 32 is provided with a first sealing groove 323, the first sealing ring 35 is disposed in the first sealing groove 323, and the valve core 32 is sealed to the top of the valve seat 31 through the first sealing ring 35.

[0033] In a preferred embodiment, the side wall of the support frame 33 is further provided with at least one locking block 333, and the inner side of the straight-through valve body 1 is provided with at least one corresponding locking groove 11. The shapes of the locking block 333 and the locking groove 11 are adapted to each other. The check valve assembly 3 is engaged with the inside of the straight-through valve body 1 through the locking block 333 and the locking groove 11. During installation, the valve seat 31, valve core 32 and support frame 33 are pre-aligned, and the check valve assembly 3 is inserted as a whole into the locking groove 11 of the straight-through valve body 1 through the locking block 333 on the support frame 33 in one go, making the installation simple and quick. It can be understood that the locking block 333 and the locking groove 11 include, but are not limited to, one, two, three or four. In this embodiment, there are two locking blocks 333 and two locking grooves 11, and the locking blocks 333 and the locking grooves 11 are symmetrically arranged with respect to the central axis of the support frame 33.

[0034] In a preferred embodiment, the union 2 is detachably connected to both ends of the straight-through valve body 1; the union 2 includes a pipe joint 21 and a union sleeve 22, and the pipe joint 21 is detachably connected to both ends of the straight-through valve body 1 through the union sleeve 22.

[0035] In a preferred embodiment, the check valve further includes a second sealing ring (not shown in the figure) and a third sealing ring (not shown in the figure); the valve seat 31 is sealed to one of the pipe joints 21 by the second sealing ring, and the top of the straight-through valve body 1 is sealed to the other pipe joint 21 by the third sealing ring.

[0036] Specifically, the valve seat 31 has a second sealing groove 311 at its bottom, and a second sealing ring is disposed in the second sealing groove 311. The valve seat 31 is sealed to one of the pipe joints 21 through the second sealing ring. The straight-through valve body 1 has a third sealing groove 12 at its top, and a third sealing ring is disposed in the third sealing groove 12. The straight-through valve body 1 is sealed to another of the pipe joints 21 through the third sealing ring.

[0037] By setting the second and third sealing rings, leakage at the connection points of the various components of the check valve is prevented, ensuring that water flow can only pass through the preset valve core 32 channel of the check valve, thereby guaranteeing the sealing reliability and operational stability of the check valve of this utility model.

[0038] In a preferred embodiment, all components of the check valve are made of plastic. Plastic has the advantages of low cost, ease of injection molding, and resistance to water corrosion, making it suitable for mass production and application of check valves for aquariums.

[0039] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A lifting check valve for a fish tank, characterized in that, include: Straight-through valve body; Two unions are located at both ends of the straight-through valve body; A check valve assembly, located inside the straight-through valve body, includes a valve seat, a valve core, and a support frame. The valve seat is in a sealing fit with the end of one of the live joints, the valve core is in a sealing fit with the valve seat, and the valve core is in a sliding fit with the support frame. The support frame is mounted on the valve seat, and at least four ribs are evenly arranged on the side wall of the support frame, with an opening formed between two adjacent ribs; the ribs are used to limit the displacement of the valve core.

2. The lifting check valve for a fish tank according to claim 1, characterized in that, The support frame is a cage-shaped support frame, and a guide cylinder is provided at the top center of the cage-shaped support frame. The guide cylinder has an inner cavity that runs vertically through the top and bottom. The top of the valve core slides through the guide cylinder.

3. The lifting check valve for a fish tank according to claim 2, characterized in that, The valve core includes a guide portion and a positioning portion. The guide portion extends upward and slides through the guide cylinder. The check valve assembly also includes an elastic element. The elastic element is sleeved on the outer periphery of the guide portion, and the top of the elastic element abuts against the bottom of the guide cylinder, while the bottom of the elastic element abuts against the positioning portion.

4. The lifting check valve for a fish tank according to claim 1, characterized in that, The check valve assembly further includes a first sealing ring; the bottom of the valve core is provided with a first sealing groove, the first sealing ring is disposed in the first sealing groove, and the valve core is sealed to the top of the valve seat through the first sealing ring.

5. The lifting check valve for a fish tank according to claim 1, characterized in that, The support frame sidewall is also provided with at least one locking block, and the inside of the straight-through valve body is provided with at least one corresponding locking groove. The locking block and the locking groove are adapted to each other in shape. The check valve assembly is engaged with the inside of the straight-through valve body through the locking block and the locking groove.

6. The lifting check valve for a fish tank according to claim 1, characterized in that, The union is detachably connected to both ends of the straight-through valve body; the union includes a pipe fitting and a union sleeve, and the pipe fitting is detachably connected to both ends of the straight-through valve body through the union sleeve.

7. The lifting check valve for a fish tank according to claim 6, characterized in that, It also includes a second sealing ring and a third sealing ring. The valve seat is sealed to one of the pipe joints through the second sealing ring, and the top of the straight-through valve body is sealed to another pipe joint through the third sealing ring.

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