Sealing check valve structure for water tank connection

Abstract

According to the sealing check valve structure connected with the water tank, a core rod and a center rod are arranged, a first plugging piece and a second plugging piece are arranged on the core rod and the center rod correspondingly, and a first elastic reset piece and a second elastic reset piece are arranged correspondingly to conduct elastic reset on the core rod and the center rod; when the fixing base is detached from the sleeve, the first elastic reset piece and the second elastic reset piece can drive the core rod and the center rod to move to block the water outlet of the fixing base and the water inlet of the water tank, sealing and non-return are achieved, the elastic reset pieces are adopted to drive the corresponding blocking pieces to conduct blocking and non-return, the blocking and non-return action is rapid, and the sealing effect is good. The non-sealing non-return effect is really achieved, the acting force is continuously applied to the first plugging piece and the second plugging piece through the first elastic reset piece and the second elastic reset piece after plugging, the sealing effect is guaranteed, and in addition, the non-sealing non-return device is simple in structure, not prone to damage, not prone to water leakage after being used for a long time and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sealed check valve technical field, especially relate to a sealed check valve structure of water tank connection. BACKGROUND

[0002] With the wide application of domestic drinking water treatment device, many of them are installed in the family water purifier, water purifier usually will be equipped with water tank use, water tank will be placed filter element and water inlet and external water pipe connection, water source through external water source into the water tank and through filter element filtration output, in order to avoid water pipe and water tank disassembly after water tank water flow guide and water pipe water outwards, generally will install sealed check valve, the structure of the existing sealed check valve is more, such as swing type, lifting type, double plate type, specifically, the valve shaft of swing type is prone to wear and tear and causes eccentricity, prone to water leakage, the guide rod of lifting type is stuck and causes valve clapper to tilt, prone to water leakage, the hinge fatigue fracture of double plate type, service life is shorter, and the sealed check valve of above these sealed check valve sealed check action is slow, a small amount of water will flow out in the process of water pipe pulling out, can not achieve the effect of rapid sealing check. SUMMARY

[0003] (I) Utility Model Objectives

[0004] In order to overcome above insufficient, the utility model discloses a sealed check valve structure of water tank connection to solve the technical problem that the existing sealed check valve structure is prone to water leakage, service life is shorter and can not achieve the effect of rapid sealing check after long time use.

[0005] (II) Technical Solutions

[0006] To achieve the above object, the technical scheme provided by the present application is as follows:

[0007] A sealing check valve structure for a water tank connection is installed on a water tank. The water tank has a water inlet, and a sleeve extends horizontally outward from the outer wall of the water inlet to form a sleeve. The structure includes: a fixed seat fitted onto the outside of the sleeve and forming a water passage cavity inside; a first end of the fixed seat is a fixed seat inlet connected to an external water source, allowing external water to flow into the water passage cavity; a second end narrows to form a fixed seat outlet with a diameter smaller than the water passage cavity; and a core rod movably disposed within the water passage cavity, with its first end corresponding to the fixed seat inlet and its second end having a first sealing element with a diameter matching the fixed seat outlet. A first elastic reset member is set inside the water passage cavity and its two ends abut against the first end of the core rod and the inner side wall of the water passage cavity, respectively; a central rod is movably inserted through the water inlet of the water tank, with its first end located outside the water tank and its second end extending into the water tank; a first water passage groove is provided on the outer side wall for water flowing out from the outlet of the fixed seat to flow through and enter the water tank; a second sealing member is set on the second end of the central rod and matches the diameter of the water inlet of the water tank; and a second elastic reset member is sleeved on the first end of the central rod and its two ends abut against the first end of the core rod and the outer side wall of the water tank, respectively.

[0008] This application employs a core rod and a center rod, with a first sealing element and a second sealing element respectively mounted on the core rod and center rod. A first elastic reset element and a second elastic reset element are also provided to elastically reset the core rod and center rod. Before the fixed seat is installed onto the sleeve of the water tank, the first elastic reset element is deployed, causing the core rod to move forward and press the first sealing element against the outlet of the fixed seat to seal it. The second elastic reset element is also deployed, causing the center rod to move backward and seal the inlet of the water tank. When the fixed seat is fitted onto the sleeve, the center rod applies a force backward to the core rod, compressing the first elastic reset element, causing the core rod to move backward, and the first sealing element to move away from the outlet of the fixed seat. Simultaneously, the core rod also applies a forward force to the center rod, causing it to move forward, and the second sealing element to move away from the inlet of the water tank. The external water source can enter the water tank through the inlet of the fixed seat, the water passage cavity, the outlet of the fixed seat, the first water passage groove of the central rod, and the water tank inlet. When the fixed seat is removed from the sleeve, the core rod and the central rod will not exert force on each other. The first and second elastic reset members can drive the core rod and the central rod to move in opposite directions to block the outlet of the fixed seat and the inlet of the water tank respectively, achieving a sealing and backflow prevention. This application uses elastic reset members to drive the corresponding sealing members to perform sealing and backflow prevention. The sealing and backflow prevention action is rapid, truly achieving a sealing and backflow prevention effect. After sealing, the first and second elastic reset members continuously apply force to the first and second sealing members to ensure the sealing effect. In addition, the structure of this application is simple, not easy to be damaged, and not easy to leak after long-term use, with a long service life.

[0009] In some embodiments, the first end of the core rod extends radially to form a first abutting portion, the end face of which abuts against the first elastic reset member and the side face of which abuts against the water passage cavity, wherein the first abutting portion is provided with a plurality of water passage openings through which water flows in the circumferential direction.

[0010] By setting the first abutting part, the contact area between the first elastic reset member and the core rod is increased. The first elastic reset member can stably apply force to the core rod. By abutting the side of the core rod with the water passage cavity, the core rod can be limited, ensuring the directionality of the core rod's movement.

[0011] In some embodiments, the second end of the core rod extends into the outlet of the fixed seat and matches the diameter of the outlet of the fixed seat, wherein the peripheral wall of the second end of the core rod is recessed inward to form a second water passage groove for the water in the water passage cavity to flow out from the outlet of the fixed seat.

[0012] By inserting the second end of the core rod into the outlet of the fixed base and ensuring that the second end of the core rod does not come out of the outlet of the fixed base during the movement, and water is supplied only through the second water channel, the directionality of the core rod during movement can be further guaranteed and the flow of water can be unimpeded.

[0013] In some embodiments, the second end of the core rod is provided with a first positioning groove for the first sealing member to be inserted and which is circumferentially arranged;

[0014] The first positioning groove can ensure the stability of the first sealing component during installation, prevent water leakage caused by gaps due to axial displacement of the first sealing component, and ensure the sealing performance.

[0015] In some embodiments, the core rod is further provided with a positioning post for the first elastic reset member to be sleeved at the second end.

[0016] The positioning pins ensure the stability of the first elastic reset component during installation, apply a parallel force to the core rod, and ensure the directionality of the core rod's movement.

[0017] In some embodiments, the central rod is provided with a second abutting portion that abuts against the second elastic reset member.

[0018] In some embodiments, the second end of the central rod is provided with a second positioning groove for the second sealing member to be inserted and which is circumferentially arranged;

[0019] The second positioning groove allows for stable installation of the second sealing component, preventing axial displacement of the second sealing component and ensuring the sealing performance.

[0020] In some embodiments, it further includes: a silicone seal disposed on the fixing base and fitted with the sleeve;

[0021] By setting a silicone sealant sleeve, the fixed seat can be quickly and stably fitted onto the water tank sleeve, which is convenient for assembly and can ensure the sealing performance of the check valve after assembly.

[0022] In some embodiments, the silicone sleeve has a slot for the end of the fixing seat to be inserted, and a plurality of first buckles opposite to the pull-out direction of the fixing seat are formed on the inner side wall of the slot. The silicone sleeve and the sleeve corresponding to the side are provided with second buckles opposite to the pull-out direction of the silicone sleeve.

[0023] Setting the first inverted buckle ensures the firmness of the assembly between the fixing seat and the silicone sealant sleeve, while setting the second inverted buckle ensures the sealing of the assembly between the silicone sealant sleeve and the water tank sleeve. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the water tank;

[0025] Figure 2 This is an assembly diagram of the sealing check valve structure for water tank connection of this utility model installed on the water tank;

[0026] Figure 3 This is an exploded view of the sealing check valve structure for the water tank connection of this utility model installed behind the water tank;

[0027] Figure 4 This is a cross-sectional view of the sealing check valve structure for water tank connection of this utility model installed behind the water tank;

[0028] Figure 5 This is a cross-sectional view of the sealing check valve structure for the water tank connection of this utility model after it has been removed from the water tank.

[0029] Figure 6 This is a schematic diagram of the fixed seat in the sealing check valve structure for water tank connection of this utility model;

[0030] Figure 7 This is a schematic diagram of the core rod in the sealing check valve structure for water tank connection of this utility model;

[0031] Figure 8 This is a schematic diagram of the central rod in the sealing check valve structure for water tank connection of this utility model;

[0032] Figure 9 This is a cross-sectional view of the silicone seal in the sealing check valve structure for water tank connection of this utility model.

[0033] Figure label:

[0034] 1. Water tank; 101. Sleeve; 2. Second sealing component; 3. Second elastic reset component; 4. Center rod; 401. First water passage groove; 402. Second abutment part; 403. Second positioning groove; 5. Silicone sealing sleeve; 501. First inverted buckle; 502. Second inverted buckle; 6. First sealing component; 7. Core rod; 701. First abutment part; 7011. Water passage notch; 702. First positioning groove; 703. Second water passage groove; 704. Positioning post; 8. First elastic reset component; 9. Fixing seat; 901. Fixing seat upper cover; 902. Fixing seat lower cover; 903. Fixing seat inlet; 904. Water passage cavity; 905. Fixing seat outlet. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0036] This utility model provides a sealing check valve structure for a water tank connection, comprising: a sleeve 101 extending horizontally outward from the outer wall of a water tank 1, which is installed on a water tank 1; the sleeve 101 is horizontally extended outward from the outer wall of the water tank inlet; a fixed seat 9 is fitted onto the outer side of the sleeve 101 and forms a water passage cavity 904 inside; the first end of the fixed seat 9 is a fixed seat inlet 903 connected to an external water source for external water to flow into the water passage cavity 904; the second end narrows to form a fixed seat outlet 905 with a diameter smaller than that of the water passage cavity 904; and a core rod 7 movably disposed within the water passage cavity 904, the first end of which corresponds to the fixed seat inlet 903, and the second end having a ring around it perpendicular to the fixed seat outlet 905. The system includes a first sealing member 6 with a diameter matching the water inlet, a first elastic reset member 8 set inside the water passage cavity 904 and with both ends abutting against the first end of the core rod 7 and the inner side wall of the water passage cavity 904 respectively, a central rod 4 movably inserted through the water inlet of the water tank, with its first end located outside the water tank 1 and its second end extending into the water tank 1, and a first water passage groove 401 opened on the outer side wall for water flowing out from the outlet 905 of the fixed seat to flow through and enter the water tank 1, a second sealing member 2 set on the second end of the central rod 4 and matching the diameter of the water inlet of the water tank, and a second elastic reset member 3 sleeved on the first end of the central rod 4 and with both ends abutting against the first end of the core rod 7 and the outer side wall of the water tank 1 respectively.

[0037] Specifically, the first sealing component 6 can be a sealing ring, and the second sealing component 2 can be a silicone sealing sheet.

[0038] Specifically, both the first elastic reset member 8 and the second elastic reset member 3 are springs.

[0039] Specifically, the fixing base 9 is composed of a fixing base upper cover 901 and a fixing base lower cover 902.

[0040] Specifically, this application provides a first abutting portion 701 radially at the first end of the core rod 7. The end face of the first abutting portion 701 abuts against the first elastic reset member 8, and the side face abuts against the water passage cavity 904. Specifically, the first abutting portion 701 has multiple water passage notches 7011 circumferentially provided for water supply. Specifically, the second end of the core rod 7 extends into the outlet 905 of the fixed seat and matches the diameter of the outlet 905 of the fixed seat. Multiple second water passage grooves 703 are formed by inward recesses on the peripheral wall of the second end of the core rod 7.

[0041] Specifically, the second end of the core rod 7 is provided with a first positioning groove 702 for the first sealing member 6 to be embedded and circumferentially arranged.

[0042] Specifically, a positioning post 704 is provided at the first end of the core rod 7 for the first elastic reset member 8 to be fitted into.

[0043] Specifically, the first water passage 401 of the center rod 4 is connected to the second water passage 703 of the core rod 7, and the water flowing out from the second water passage 703 of the core rod 7 will flow into the water tank 1 along the first water passage 401.

[0044] Specifically, the second end of the center rod 4 is a sealed structure and a second positioning groove 403 is provided at the second end. The second sealing member 2 is embedded in the second positioning groove 403. When the center rod 4 moves backward, the first water passage 401 is completely moved out of the water tank 1 and the second sealing member 2 blocks the water inlet of the water tank.

[0045] Specifically, the center rod 4 is provided with a second abutment part 402, and the second elastic reset member 3 abuts against the second abutment part 402.

[0046] Specifically, a silicone sealant 5 is provided on the fixing seat 9, and the fixing seat 9 can be fitted onto the sleeve 101 of the water tank 1 through the silicone sealant 5.

[0047] Specifically, initially, before the fixed seat 9 is installed on the sleeve 101 of the water tank 1, the first elastic reset member 8 is unfolded, which drives the core rod 7 to move forward and press the first sealing member 6 onto the outlet 905 of the fixed seat to seal the outlet 905 of the fixed seat. The second elastic reset member 3 is also unfolded, which drives the center rod 4 to move backward and the second sealing member 2 to seal the inlet of the water tank.

[0048] When the fixing seat 9 is fitted onto the sleeve 101, the central rod 4 applies a backward force to the core rod 7, compressing the first elastic reset member 8. The core rod 7 moves backward, and the first sealing member 6 leaves the outlet 905 of the fixing seat. At the same time, the core rod 7 also applies a forward force to the central rod 4, causing the central rod 4 to move forward. The second sealing member 2 also leaves the water tank inlet. In this way, external water can enter the water tank 1 through the fixing seat inlet 903 - water passage cavity 904 - water passage notch 7011 - second water passage groove 703 - fixing seat outlet 905 - first water passage groove 401 - water tank inlet. When the fixing seat 9 is removed from the sleeve 101, the core rod 7 and the central rod 4 will not exert force on each other. The first elastic reset member 8 and the second elastic reset member 3 can drive the core rod 7 and the central rod 4 to move in the opposite direction, respectively sealing the outlet 905 of the fixing seat and the water tank inlet, thus achieving a sealing and backflow prevention.

[0049] Preferably, this application provides a slot in the silicone sleeve 5 for the end of the fixing seat 9 to be inserted for assembly. Preferably, this application provides multiple first buckles 501 formed on the inner wall of the slot, opposite to the pull-out direction of the fixing seat 9. The first buckles 501 can prevent the fixing seat 9 from coming out of the slot under water pressure impact. In addition, a second buckle 502 is provided on the side of the silicone sleeve 5 corresponding to the sleeve 101 to prevent the silicone sleeve 5 from coming out of the sleeve 101 of the water tank 1.

[0050] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A sealing check valve structure for connecting a water tank, characterized in that, Installed on a water tank (1), the water tank (1) has a water tank inlet and a sleeve (101) extending horizontally outward on the outer wall of the water tank inlet, including: a fixed seat (9) sleeved on the outside of the sleeve (101) and forming a water passage cavity (904) inside, the first end of the fixed seat (9) is a fixed seat inlet (903) connected to an external water source to allow external water to flow into the water passage cavity (904), the second end narrows to form a fixed seat outlet (905) with a diameter smaller than the water passage cavity (904), and a core rod (7) movably disposed in the water passage cavity (904), the first end corresponding to the fixed seat inlet (903), and the second end having a first sealing member (6) with a diameter matching the fixed seat outlet (905) on its upper ring. A first elastic reset member (8) is located inside the water passage cavity (904) and its two ends abut against the first end of the core rod (7) and the inner side wall of the water passage cavity (904), respectively. A central rod (4) is movably installed at the water inlet of the water tank. Its first end is located outside the water tank (1) and its second end extends into the water tank (1). A first water passage groove (401) is provided on the outer side wall to allow water flowing out from the outlet (905) of the fixed seat to flow through and enter the water tank (1). A second sealing member (2) is set on the second end of the central rod (4) and matches the diameter of the water inlet of the water tank. A second elastic reset member (3) is sleeved on the first end of the central rod (4) and its two ends abut against the first end of the core rod (7) and the outer side wall of the water tank (1) respectively.

2. The sealing check valve structure for water tank connection according to claim 1, characterized in that, The first end of the core rod (7) extends radially to form a first abutting part (701), the end face of which abuts against the first elastic reset member (8) and the side face abuts against the water passage cavity (904). The first abutting part (701) is provided with a plurality of water passage openings (7011) for water to flow through in the circumferential direction.

3. The sealing check valve structure for water tank connection according to claim 1, characterized in that, The second end of the core rod (7) extends into the outlet (905) of the fixed seat and matches the diameter of the outlet (905) of the fixed seat. The peripheral wall of the second end of the core rod (7) is recessed inward to form a second water passage (703) through which the water flows.

4. The sealing check valve structure for water tank connection according to claim 1, characterized in that, The second end of the core rod (7) is provided with a first positioning groove (702) for the first sealing member (6) to be inserted and circumferentially arranged.

5. The sealing check valve structure for water tank connection according to claim 1, characterized in that, Also includes: The first end of the core rod (7) is provided with a positioning post (704) for the first elastic reset member (8) to be sleeved.

6. The sealing check valve structure for water tank connection according to claim 1, characterized in that, The center rod (4) is provided with a second abutting part (402) that abuts against the second elastic reset member (3).

7. The sealing check valve structure for water tank connection according to claim 1, characterized in that, The second end of the central rod (4) is provided with a second positioning groove (403) for the second sealing member (2) to be embedded.

8. The sealing check valve structure for water tank connection according to claim 1, characterized in that, Also includes: A silicone sealant (5) is disposed on the fixed base (9) and fitted onto the sleeve (101).

9. The sealing check valve structure for water tank connection according to claim 8, characterized in that, The silicone sleeve (5) has a slot for the end of the fixing seat (9) to be inserted, and a plurality of first buckles (501) opposite to the pull-out direction of the fixing seat (9) are formed on the inner side wall of the slot. The silicone sleeve (5) and the sleeve (101) are provided with second buckles (502) opposite to the pull-out direction of the silicone sleeve (5).

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