Water leakage prevention device for filter element of water purifier

Abstract

The utility model discloses a water purifier filter element leakproof device, including the first joint subassembly, including first shell, first water through opening, first sealing piece and first elastic piece, first water through opening is provided on the first shell, first sealing piece is movably provided in first water through opening through first elastic piece, and first elastic piece is provided on the first shell. The first sealing piece can seal the first water passing opening; the second connector assembly comprises a second shell, a second water passing opening, a second sealing piece and a second elastic piece, the second water passing opening is formed in the second shell, the second sealing piece is movably arranged in the second water passing opening through the second elastic piece, and the second sealing piece can seal the second water passing opening. According to the utility model, the self-sealing structures are respectively arranged at the two mutually matched water passing ports, so that when the water passing ports are disconnected, the water flow passage is automatically disconnected and the water passing ports are sealed, and the water leakage when the water purifier filter element is disconnected from the water pipe is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water purifier, especially relate to a water purifier filter element leak protection device. BACKGROUND

[0002] When installing or dismounting the filter element of the water purifier, the user is usually required to cut off the power and water, because the water purifier filter element and the water pipe connection place cannot automatically cut off the water, and if the user dismounts the filter element without cutting off the power and water, water leakage will occur after the filter element is disconnected from the water pipe. At present, some filter elements have a structure that can automatically seal after being disconnected, but there is no device for simultaneously sealing the filter element and the water pipe of the water purifier, resulting in safety hazards when dismounting the filter element of the water purifier. SUMMARY

[0003] In view of the problems existing in the prior art, the utility model provides a water purifier filter element leak protection device, which can effectively prevent water leakage when the filter element is disconnected from the water pipe. The technical solution is as follows:

[0004] The utility model provides a water purifier filter element leak protection device, which comprises:

[0005] The first joint assembly comprises a first housing, a first water inlet, a first sealing element, and a first elastic element. The first water inlet is arranged on the first housing. The first sealing element is movably arranged in the first water inlet through the first elastic element. The first sealing element can seal the first water inlet.

[0006] The second joint assembly comprises a second housing, a second water inlet, a second sealing element, and a second elastic element. The second water inlet is arranged on the second housing. The second sealing element is movably arranged in the second water inlet through the second elastic element. The second sealing element can seal the second water inlet.

[0007] After the first sealing element and the second sealing element abut, the first sealing element can move towards the inner cavity of the first housing, and the second sealing element can move towards the inner cavity of the second housing. The first water inlet cooperates with the second water inlet, and the inner cavity of the first housing, the first water inlet, the second water inlet, and the inner cavity of the second housing are in communication.

[0008] In one embodiment, the first joint assembly further comprises a first limiting element. The first limiting element is arranged in the inner cavity of the first housing and is arranged opposite to the first water inlet. The first limiting element is connected with the first sealing element through the first elastic element, and can limit the position of one end of the first elastic element and limit the movement stroke of the first sealing element.

[0009] In one of the embodiments, the second joint assembly further comprises a second limiting member, which is arranged in the inner cavity of the second housing and opposite to the second water passage, and is connected with the second sealing member through the second elastic member, so as to limit the position of one end of the second elastic member and limit the movement stroke of the second sealing member.

[0010] In one of the embodiments, the first limiting member comprises a first limiting hole, a first limiting support and a first hollow structure, and the first limiting hole is connected with the first limiting support through the first hollow structure.

[0011] The second limiting member comprises a second limiting hole, a second limiting support and a second hollow structure, and the second limiting hole is connected with the second limiting support through the second hollow structure.

[0012] In one of the embodiments, the first sealing member comprises a first top block, a first limiting rod and a first sealing ring, the first top block is fixedly connected with the first limiting rod, one end of the first top block can be deep into the first water passage, and the other end of the first top block has a radial dimension greater than that of the first water passage.

[0013] The first sealing ring is sleeved on the first top block, and in the sealed state of the first water passage, the first sealing ring abuts against the first water passage.

[0014] In one of the embodiments, the first top block comprises a first base and a second base, the first base can be deep into the first water passage, the second base has a radial dimension greater than that of the first water passage, and a third hollow structure is arranged at the connection between the first base and the second base.

[0015] In one of the embodiments, the second sealing member comprises a second top block, a second limiting rod and a second sealing ring, the second top block is fixedly connected with the second limiting rod, one end of the second top block can be deep into the second water passage, and the other end of the second top block has a radial dimension greater than that of the second water passage.

[0016] The second sealing ring is sleeved on the second top block, and in the sealed state of the second water passage, the second sealing ring abuts against the second water passage.

[0017] In one of the embodiments, the second top block comprises a third base and a fourth base, the third base can be deep into the second water passage, the fourth base has a radial dimension greater than that of the second water passage, and a hollow structure is arranged at the connection between the third base and the fourth base.

[0018] The third hollow structure and the fourth hollow structure are communicated in the abutted state of the first sealing member and the second sealing member.

[0019] In one of the embodiments, the outer diameter of the first water passage is smaller than the inner diameter of the second water passage, and the first water passage can be deeply inserted into the second water passage and tightly contact with the second water passage.

[0020] In one of the embodiments, the water leakage prevention device further comprises a waterproof member arranged on the outer wall of the first water passage or the inner wall of the second water passage, and the waterproof member is tightly arranged between the first water passage and the second water passage in the contact state of the first water passage and the second water passage.

[0021] The utility model discloses, have the following beneficial effects:

[0022] The utility model discloses a self-sealing assembly is arranged at the joint of the filter core and the water pipe, and the water passage is automatically formed when the two joints are connected, and the water passage is automatically cut off when the two joints are disconnected, and the water passage of the two joints is sealed, the filter core is removed in the water passage state of the water purifier, and the water passage of the filter core and the water pipe can be simultaneously sealed, the water leakage problem is prevented, and the safety hidden danger caused by water leakage when the water is on is avoided, the device is simple to operate, and the device is simple to operate. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the utility model, the following will be briefly introduced the drawings used in the embodiment, wherein the same parts are indicated by the same reference signs. Obviously, the drawings in the following description are only one embodiment of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0024] Figure 1 The structure diagram of the water purifier filter core water leakage prevention device provided by the embodiment of the utility model is shown in the figure.

[0025] Figure 2 The structure diagram of the water purifier filter core water leakage prevention device provided by the embodiment of the utility model is shown in the figure.

[0026] Figure 3 The structure diagram of the first sealing member provided by the embodiment of the utility model is shown in the figure.

[0027] Figure 4 The structure diagram of the first limiting member provided by the embodiment of the utility model is shown in the figure.

[0028] Wherein, the figure mark corresponds to:

[0029] 1-First joint assembly, 11-First housing, 12-First water passage, 13-First sealing element, 131-First top block, 1311-First base, 1312-Second base, 132-First limiting rod, 133-First sealing ring, 14-First elastic element, 15-First limiting element, 151-First limiting hole, 152-First limiting support, 153-First hollow structure, 16-First fixing element, 17-Waterproof element;

[0030] 2-Second joint assembly, 21-Second housing, 22-Second water passage, 23-Second sealing element, 231-Second top block, 232-Second limiting rod, 233-Second sealing ring, 24-Second sealing element, 25-Second limiting element, 251-Second limiting hole, 26-Second fixing element. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purpose, characteristics and advantages of the utility model more apparent, easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a lot of specific details are set forth in order to give a thorough understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0032] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one of the features.

[0033] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element.

[0035] ReferenceFigures 1-4 An embodiment of this utility model provides a water purifier filter cartridge anti-leakage device, including a first connector assembly and a second connector assembly, one of which is connected to the water purifier filter cartridge and the other is connected to the water purifier water pipe, which can effectively prevent water leakage at the water purifier filter cartridge and water pipe joint.

[0036] The first connector assembly 1 includes a first housing 11, a first water inlet 12, a first seal 13, and a first elastic member 14. The first water inlet 12 is disposed on the first housing 11, and the first seal 13 is movably disposed in the first water inlet 12 through the first elastic member 14, and the first seal 13 can seal the first water inlet 12. The second connector assembly 2 includes a second housing 21, a second water inlet 22, a second seal 23, and a second elastic member 24. The second water inlet 22 is disposed on the second housing 21, and the second seal 23 is movably disposed in the second water inlet 22 through the second elastic member 24, and the second seal 23 can seal the second water inlet 22.

[0037] Specifically, when the first connector assembly 1 and the second connector assembly 2 are connected, such as... Figure 2 As shown, the first sealing member 13 abuts against the second sealing member 23. The first sealing member 13 can move toward the inner cavity of the first housing 11, and the second sealing member 23 can move toward the inner cavity of the second housing 21. The first elastic member 14 and the second elastic member 24 are compressed until the first water inlet 12 and the second water inlet 22 cooperate. The inner cavity of the first housing 11, the first water inlet 12, the second water inlet 22 and the inner cavity of the second housing 21 are connected, so that water can flow through the water inlet. That is, when the first water inlet 12 and the second water inlet 22 are connected, the water flow path is automatically opened, which effectively improves the convenience of operation.

[0038] When the first connector assembly 1 is disconnected from the second connector assembly 2, the first elastic member 14 pushes the first sealing member 14 to move outward from the first housing 11, and the second elastic member 24 pushes the second sealing member 24 to move outward from the second housing 21, so that the first water inlet 12 and the second water inlet 22 are sealed. That is, when the first connector assembly 1 is connected to the second connector assembly 2, the first sealing member 13 and the second sealing member 23 can automatically cut off the water flow path and seal the first water inlet 12 and the second water inlet 22, effectively preventing water leakage at the joint.

[0039] The water leakage prevention device provided by the embodiment of the utility model can be installed at the connecting position of the filter core and the water pipe of the water purifier, the first sealing piece 13 and the second sealing piece 23 are arranged at the first water inlet 12 and the second water inlet 22 respectively, the water flow path between the filter core and the water pipe is disconnected when the filter core and the water pipe are disconnected, the first water inlet 12 and the second water inlet 22 are automatically sealed, the filter core and the water pipe are prevented from leaking, the safety problem caused by water leakage of the water purifier under the water supply and power supply state is avoided, and the use safety is effectively improved; and the water flow path is automatically formed when the filter core and the water pipe are connected, and the operation convenience of the water leakage prevention device is improved.

[0040] In one embodiment, the first joint assembly 1 further comprises a first limiting piece 15 arranged in the inner cavity of the first shell 11 and arranged opposite to the first water inlet 12, the first limiting piece 15 is connected with the first sealing piece 13 through the first elastic piece 14, can limit the position of one end of the first elastic piece 14, prevent the position of the first elastic piece 14 from moving as a whole, make the first elastic piece 14 be compressed in the movement process of the first sealing piece 13, and the first elastic piece 14 can store enough elastic force to push the first sealing piece 13 to seal the first water inlet 12, realize the effect of automatic sealing when the water inlet is disconnected; the first limiting piece 15 can limit the movement stroke of the first sealing piece 13, prevent the first water inlet 12 from leaking due to the misplacement of the first sealing piece 13 in the movement process.

[0041] In one optional embodiment, the first limiting piece 15 is detachably installed in the inner cavity of the first shell 11 through the first fixing piece 16, the first fixing piece 16 is arranged on the side of the first limiting piece 15 away from the first water inlet 12 and fixedly arranged on the inner wall of the first shell 11, can fix the position of the first limiting piece 15 and prevent the first limiting piece 15 from moving, so that the first limiting piece 15 can be quickly installed and dismounted, the old damaged parts can be replaced, and appropriate limiting pieces can be replaced according to the actual needs of the water purifier. In other optional embodiments, a groove can be arranged in the inner cavity of the first shell 11 to realize detachable installation of the first limiting piece 15.

[0042] In one embodiment, referring to Figure 4The first limiting piece 15 includes a first limiting hole 151, a first limiting support 152 and a first hollow structure 153. The first limiting hole 151 is connected with the first limiting support 152 through the first hollow structure 153, and the first limiting support 152 is connected with the inner cavity of the first shell 11. The first limiting hole 151 can allow the first sealing piece 13 to pass through and limit the movement stroke of the first sealing piece 13 in the axial direction. Preferably, the center of the first limiting hole 151 is located on the same straight line as the center of the first water outlet 12, which can ensure that the first sealing piece 13 moves in the straight line direction and prevent the sealing piece from being misaligned in the water outlet to cause water leakage, thereby improving the sealing performance.

[0043] In one embodiment, the second joint assembly 2 further includes a second limiting piece 25 arranged in the inner cavity of the second shell 21 and opposite to the second water outlet 22. The second limiting piece 25 is connected with the second sealing piece 23 through the second elastic piece 24, which can limit the position of one end of the second elastic piece 24 and enable the second elastic piece 24 to store sufficient elastic force to push the second sealing piece 23 to seal the second water outlet 22, thereby achieving the effect of automatic sealing when the water outlet is disconnected. The second limiting piece 25 can limit the movement stroke of the second sealing piece 23 and prevent the second water outlet 22 from leaking due to misalignment of the second sealing piece 23 during movement.

[0044] In an optional embodiment, the second limiting piece 25 is detachably installed in the inner cavity of the second shell 21 through a second fixing piece 26. The second fixing piece 26 is arranged on the inner wall of the second shell 21 away from the second water outlet 22. The second fixing piece 26 can fix the position of the second limiting piece 25 and prevent the second limiting piece 25 from moving. In this way, the second limiting piece 25 can be quickly installed and removed, which is convenient for replacing old and damaged parts. In addition, appropriate limiting pieces can be replaced according to the actual needs of the water purifier. In other optional embodiments, a groove can be arranged in the inner cavity of the second shell 21 to achieve detachable installation of the second limiting piece 25.

[0045] Specifically, the second limiting piece 25 includes a second limiting hole 251, a second limiting support and a second hollow structure. The second limiting hole 251 is connected with the second limiting support through the second hollow structure, and the second limiting support is connected with the inner cavity of the second shell 21. The second limiting hole 251 can allow the second sealing piece 23 to pass through and limit the movement stroke of the second sealing piece 23. Preferably, the center of the second limiting hole 251 is located on the same straight line as the center of the second water outlet 22, which can limit the movement of the second sealing piece 23 in the straight line direction and prevent the sealing piece from being misaligned in the water outlet to cause water leakage, thereby improving the sealing performance. The first hollow structure and the second hollow structure can enable water to quickly pass through the limiting piece.

[0046] In one embodiment, the first sealing piece 13 comprises a first top block 131, a first limiting rod 132 and a first sealing ring 133, the first top block 131 is fixedly connected with the first limiting rod 132, one end of the first top block 131 can penetrate into the first water passage 12, the other end of the first top block 131 has a radial dimension greater than that of the first water passage 12, so that one end of the first top block 131 can move in the first water passage 12, and the other end can seal the first water passage 12 when in contact with the first water passage 12.

[0047] Specifically, the first sealing ring 133 is sleeved on the first top block 131, and in the sealed state of the first water passage 12, the first sealing ring 133 abuts against the first water passage 12, so as to improve the sealing performance of the first sealing piece 13 on the first water passage 12.

[0048] Specifically, the first sealing ring 133 is arranged at one end of the first top block 131 capable of sealing the first water passage 12, and the outer diameter of the first sealing ring 133 is greater than the inner diameter of the first water passage 12, so that in the sealed state of the first water passage 12, the first top block 131 and the first sealing ring 133 can be in close contact with the first water passage 12, thereby improving the sealing performance.

[0049] Preferably, the first sealing ring 133 can be a waterproof rubber ring, which can prevent water leakage at the contact position of the first sealing piece 13 and the first water passage 12, and prevent the first sealing piece 13 from colliding with the inner wall of the first water passage 12 when the first elastic piece 14 pushes the first sealing piece 13 towards the first water passage 12, thereby reducing the loss of the device.

[0050] Specifically, the first limiting rod 132 can penetrate through the first limiting hole 151 and move relative to the first limiting hole 151, and in the movement process of the first limiting rod 132, the first limiting hole 151 can limit the movement direction of the first limiting rod 132, prevent the first limiting rod 131 from shaking or displacement, and further prevent the first top block 131 from being misaligned in the first water passage 12, thereby effectively improving the sealing effect.

[0051] In one embodiment, the first elastic member 14 includes a pressure spring capable of providing a stable pushing force to the first sealing member 13; for example, the first elastic member 14 can be provided with a pressure spring sleeved on the first limiting rod 132, one end of the pressure spring being connected with the first limiting hole 151 and the other end being connected with the first top block 131, so as to avoid the first elastic member 14 from falling off during movement and causing water leakage of the water outlet. In other embodiments, according to actual needs, the first elastic member 14 can include two or more pressure springs to improve the stability and durability of the first elastic member 14. In other embodiments, the first elastic member 14 is not limited to a pressure spring, but can also be other common elastic elements capable of achieving the function.

[0052] In one embodiment, referring to Figure 3 , the first top block 131 includes a first base 1311 capable of penetrating into the first water outlet 12 and a second base 1312 having a radial dimension greater than that of the first water outlet 12, and a third hollow structure is arranged at the connection between the first base 1311 and the second base 1312. When the first water outlet 12 and the second water outlet 22 are communicated, water flow can pass through the third hollow structure, which can improve the water flow between the filter element and the water pipe and improve the water purification efficiency.

[0053] Specifically, a first groove is arranged at the connection between the third hollow structure and the second base 1312, and the first sealing ring 133 can be fitted in the first groove. The first groove can clasp the first sealing ring 133 to prevent the first sealing ring 133 from moving during movement of the first sealing member 13 and ensure the sealing performance of the first sealing member 13 on the first water outlet 12.

[0054] In one embodiment, the second sealing member 23 includes a second top block 231, a second limiting rod 232 and a second sealing ring 233, the second top block 231 being fixedly connected with the second limiting rod 232, one end of the second top block 231 being capable of penetrating into the second water outlet 22 and the other end having a radial dimension greater than that of the second water outlet 22, so that the second top block 231 can move in the second water outlet 22 and seal the second water outlet 22 when the other end is in contact with the second water outlet 22.

[0055] Specifically, the second sealing ring 233 is sleeved on the second top block 231, and the second sealing ring 233 is in abutment with the second water outlet 22 in the sealed state of the second water outlet 22, thereby improving the sealing performance of the second sealing member 23 on the second water outlet 22.

[0056] Preferably, the second sealing ring 233 is arranged close to the end of the second top block 231 capable of sealing the second water passage 22, and the outer diameter of the second sealing ring 233 is larger than the inner diameter of the second water passage 22, so that in the sealed state of the second water passage 22, the end of the second top block 231 close to the second sealing ring 233 can be in close contact with the second sealing ring 233, which is conducive to improving the sealing performance.

[0057] Preferably, the second sealing ring 233 can be a waterproof rubber ring, which can prevent water leakage at the contact position between the second sealing member 23 and the second water passage 22, and prevent the second sealing member 23 from colliding with the inner wall of the second water passage 22 when the second elastic member 24 pushes the second sealing member 23 towards the second water passage 22, thereby reducing the wear and tear of the device.

[0058] Specifically, the second limiting rod 232 can pass through the second limiting hole 251 and move relative to the second limiting hole 251, and during the movement of the second limiting rod 232, the second limiting hole 251 can limit the movement direction of the second limiting rod 232 to prevent the second limiting rod 231 from shaking or displacing, thereby preventing the second top block 231 from being misaligned in the second water passage 22, and effectively improving the sealing effect.

[0059] In one embodiment, the second elastic member 24 includes a pressure spring capable of providing a stable pushing force to the second sealing member 23; the pressure spring is sleeved on the second limiting rod, one end of the pressure spring is connected with the second limiting hole 251, and the other end is connected with the second top block 231, so as to avoid the second elastic member 24 from falling off during movement and causing water leakage of the water passage. In other embodiments, according to actual needs, the second elastic member 24 can include two or more pressure springs to improve the stability and durability of the second elastic member 24. In other embodiments, the second elastic member 24 is not limited to a pressure spring, but can also be other commonly used elastic elements that can achieve the function.

[0060] In one embodiment, the second top block includes a third base capable of penetrating into the second water passage 22 and a fourth base having a radial dimension larger than that of the second water passage 22, and a fourth hollow structure is arranged at the connection between the third base and the fourth base, so that when the first water passage 12 and the second water passage 22 are communicated, water flow can pass through the fourth hollow structure to improve the water flow between the filter element and the water pipe.

[0061] Specifically, a second groove is arranged at the connection between the fourth hollow structure and the fourth base, and the second sealing ring 233 can be fitted in the second groove, the second groove can clasp the second sealing ring 233 to prevent the second sealing ring 233 from being misaligned during the movement of the second sealing member 23, and ensure the sealing performance of the second sealing member 23.

[0062] Preferably, the first top block 131 and the second top block 231 both have a hollow structure, when the first sealing piece 13 abuts against the second sealing piece 23, the inner cavity of the first shell 11, the inner cavity of the first top block 131, the inner cavity of the second top block 231 and the inner cavity of the second shell 21 are communicated, which can effectively improve the water flow in the connected state of the water leakage prevention device, and is beneficial to improve the water purification efficiency of the water purifier.

[0063] In one embodiment, the outer diameter of the first water inlet 12 is smaller than the inner diameter of the second water inlet 22, the first water inlet 12 can be deeply inserted into the second water inlet 22 and tightly contact with the second water inlet 22, so that the first water inlet 12 and the second water inlet 22 can be connected, the first sealing piece 13 and the second sealing piece 23 abut to form a passage, and the user can connect the first joint assembly and the second joint assembly by simple operation, thereby facilitating the installation and disassembly of the filter core of the water purifier; the tight cooperation of the first water inlet 12 and the second water inlet 22 can prevent water leakage at the water inlet connection. In other embodiments, the connection mode of the first water inlet 12 and the second water inlet 22 can be threaded connection or other suitable connection mode.

[0064] In one embodiment, the water leakage prevention device further comprises a waterproof piece 17, which is arranged on the outer wall of the first water inlet 12 or the inner wall of the second water inlet 22, and tightly abuts between the first water inlet 12 and the second water inlet 22 in the contact state of the first water inlet 12 and the second water inlet 22, which can seal the gap between the water inlets and prevent water leakage at the water inlet connection, thereby improving the reliability of the water inlet connection. Preferably, the waterproof piece 17 comprises at least one waterproof rubber ring, which can be sealed and compressed between the first water inlet 12 and the second water inlet 22 to prevent water leakage of the first water inlet 12 and the second water inlet 22 in the connected state. The waterproof piece 17 is not limited to the waterproof rubber ring, but can also be other commonly used waterproof sealing elements.

[0065] The above description is only some embodiments of the present application and is not used to limit the present application. It should be understood by those skilled in the art that the present application can have various changes and improvements, and any modification, equivalent replacement and improvement according to the present application all fall within the scope of the present application.

Claims

1. A water purifier filter cartridge leak-proof device, characterized in that, The utility model relates to a first joint assembly (1) comprising a first housing (11), a first water passage (12), a first sealing element (13) and a first elastic element (14), the first water passage (12) being arranged on the first housing (11), the first sealing element (13) being movably arranged in the first water passage (12) by the first elastic element (14), and the first sealing element (13) being capable of sealing the first water passage (12); a second joint assembly (2) comprising a second housing (21), a second water passage (22), a second sealing element (23) and a second elastic element (24), the second water passage (22) being arranged on the second housing (21), the second sealing element (23) being movably arranged in the second water passage (22) by the second elastic element (24), and the second sealing element (23) being capable of sealing the second water passage (22); and the first sealing element (13) and the second sealing element (23) abutting each other, the first sealing element (13) being capable of moving towards the inner cavity of the first housing (11), and the second sealing element (23) being capable of moving towards the inner cavity of the second housing (21), so that the first water passage (12) cooperates with the second water passage (22), and the inner cavity of the first housing (11), the first water passage (12), the second water passage (22) and the inner cavity of the second housing (21) are in communication. The first joint assembly (1) further comprises a first limiting element (15) arranged in the inner cavity of the first housing (11) and arranged opposite to the first water passage (12), the first limiting element (15) being connected to the first sealing element (13) by the first elastic element (14) and capable of limiting the position of one end of the first elastic element (14) and the movement stroke of the first sealing element (13). The second joint assembly (2) further comprises a second limiting element (25) arranged in the inner cavity of the second housing (21) and arranged opposite to the second water passage (22), the second limiting element (25) being connected to the second sealing element (23) by the second elastic element (24) and capable of limiting the position of one end of the second elastic element (24) and the movement stroke of the second sealing element (23). The first limiting element (15) comprises a first limiting hole (151), a first limiting support (152) and a first hollow structure (153), the first limiting hole (151) being connected to the first limiting support (152) by the first hollow structure (153); 2. The water leakage preventing apparatus for a filter cartridge of a water purifier according to claim 1, wherein The second limiting element (25) comprises a second limiting hole (251), a second limiting support and a second hollow structure, the second limiting hole (251) being connected to the second limiting support by the second hollow structure.

3. The water leakage preventing apparatus for a filter cartridge of a water purifier according to claim 2, wherein ​ 4. The water leakage preventing apparatus for a filter cartridge of a water purifier according to claim 3, wherein ​ ​ 5. The water leakage preventing device for a filter cartridge of a water purifier according to any one of claims 1 to 3, characterized in that, The first sealing piece (13) comprises a first top block (131), a first limiting rod (132) and a first sealing ring (133), the first top block (131) is fixedly connected with the first limiting rod (132), one end of the first top block (131) can be deep into the first water inlet (12), the other end of the first top block (131) has a radial dimension greater than that of the first water inlet (12); The first sealing ring (133) is sleeved on the first top block (131), and the first sealing ring (133) abuts against the first water inlet (12) in a sealed state of the first water inlet (12).

6. The water leakage preventing apparatus for a filter cartridge of a water purifier according to claim 5, wherein The first top block (131) comprises a first base (2311) and a second base (2312), the first base (2311) can be deep into the first water inlet (12), the second base (2312) has a radial dimension greater than that of the first water inlet (12), and a third hollow structure is arranged at a connection between the first base (2311) and the second base (2312).

7. The water leakage preventing apparatus for a filter cartridge of a water purifier according to claim 6, wherein The second sealing piece (23) comprises a second top block (231), a second limiting rod (232) and a second sealing ring (233), the second top block (231) is fixedly connected with the second limiting rod (232), one end of the second top block (231) can be deep into the second water inlet (22), and the other end of the second top block (231) has a radial dimension greater than that of the second water inlet (22); The second sealing ring (233) is sleeved on the second top block (231), and the second sealing ring (233) abuts against the second water inlet (22) in a sealed state of the second water inlet (22).

8. The water leakage preventing apparatus for a filter cartridge of a water purifier according to claim 7, wherein The second top block (231) comprises a third base and a fourth base, the third base can be deep into the second water inlet (22), the fourth base has a radial dimension greater than that of the second water inlet (22), and a fourth hollow structure is arranged at a connection between the third base and the fourth base; In the abutting state of the first sealing piece (13) and the second sealing piece (23), the third hollow structure and the fourth hollow structure are in communication.

9. The water leakage preventing apparatus for a filter cartridge of a water purifier according to any one of claims 1 to 3, characterized in that, The outer diameter dimension of the first water inlet (12) is smaller than the inner diameter dimension of the second water inlet (22), and the first water inlet (12) can be deep into the second water inlet (22) and tightly contact the second water inlet (22).

10. The water filter cartridge leak protection device of any one of claims 1-3, wherein, The waterproof piece (17) is arranged on the outer wall of the first water inlet (12) or the inner wall of the second water inlet (22), and the waterproof piece (17) is tightly arranged between the first water inlet (12) and the second water inlet (22) in the contact state of the first water inlet (12) and the second water inlet (22).

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