CN218178075U

CN218178075U - Leak protection water tap case

Info

Publication number: CN218178075U
Application number: CN202222026435.6U
Authority: CN
Inventors: 朱将来; 杨桂; 李强
Original assignee: Zhejiang Chixin Group Co ltd
Current assignee: Zhejiang Chixin Group Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-12-30
Anticipated expiration: 2032-08-01

Abstract

The utility model provides a leak protection water tap case belongs to case technical field. The technical problems that the existing water faucet valve core is poor in sealing performance and water leaks and the like are solved. This leak protection water tap case, including the casing, the installation cavity that link up about being provided with in the casing, the rotatable valve rod of installing of installation cavity inner rotatable, the tip is inside to be projected to have a location bulge loop under the installation cavity, and the valve rod is from last to having set gradually location section and seal segment down, and the lower terminal surface of location section supports with the upper surface of location bulge loop and leans on, and the seal segment external diameter is less than location section external diameter, and one section outside cover that the seal segment is located the casing is equipped with seal cover, seal cover and casing fixed connection. The utility model has the advantages of good sealing performance, simple structure, convenient manufacture and cost saving.

Description

Leak protection water tap case

Technical Field

The utility model belongs to the technical field of the case, refer in particular to a leak protection tap case.

Background

A tap cartridge is a valve part by which the basic functions of direction control, pressure control or flow control are achieved by the movement of a valve body. A typical faucet valve cartridge includes a housing, and a valve stem and a seal mounted in the housing, and the faucet valve cartridge is controlled by rotation or/and up-and-down movement of the valve stem to achieve directional control, pressure control or flow control. Because the resistance of the fluid is large, the sealing element is easy to wear when the valve rod runs for a long time, and the water leakage phenomenon is caused.

Such as chinese patent application No. 201210341362.8. The invention provides a valve cap, wherein a sealing filler is arranged between the upper part of the valve cap and a valve rod, a sealing element is arranged between a valve cap and the sealing filler, and the sealing element compresses the sealing filler by screwing the valve cap so as to seal the upper part of the valve cap. The valve rod can drive the valve cap to rotate when rotating and lifting, so that the valve cap and the valve cover are loosened, the sealing element cannot compress the sealing filler, and the water leakage phenomenon is easy to occur.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a leak protection water valve core that sealing performance is good.

The utility model discloses a following technical scheme of purpose accessible realizes a leak protection water tap case, including the casing, the installation cavity that link up about being provided with in the casing, the rotatable valve rod of installing of installation cavity, the inside protrusion of tip has the location bulge loop under the installation cavity, the valve rod is from last to having set gradually seal segment and location section down, the lower terminal surface of location section supports with the upper surface of location bulge loop and leans on, the seal segment external diameter is less than the location segment external diameter, seal segment outside cover is equipped with the seal cover, seal cover and casing fixed connection.

In foretell leak protection tap case, be the installation cavity that link up from top to bottom in the casing, the installation cavity lower extreme inwards extrudes the location bulge loop, location bulge loop upper surface supports with the lower surface of the well location section of valve rod and leans on, make the valve rod can not descend, the external diameter of the seal section in the valve rod is less than the location section external diameter, the seal section that is said is the indentation section of location section, because one section outside cover that the seal section is located the casing is equipped with the seal cover, seal cover and casing fixed connection, the seal cover blocks the location section, make whole valve rod can not reciprocate, but can rotate around self axis, the seal cover can make casing upper end and valve rod seal section junction sealing effect better, and seal cover and casing fixed connection, the valve rod can not reciprocate, make the better seal cover fix the seal section junction with the valve rod in the casing upper end, valve rod location section and casing also are provided with sealing connection, this leak protection tap case's overall sealing performance is good, moreover, the steam generator is simple structure, manufacturing is convenient, and cost saving.

Furthermore, the sealing sleeve is provided with an external gear, and the upper end part of the shell is provided with an internal gear meshed with the external gear.

In the leak-proof water tap valve core, the sealing sleeve and the upper end part of the shell are meshed through the internal gear and the external gear, so that the sealing sleeve can be well fixed and can be conveniently replaced when the sealing sleeve is used and abraded for multiple times. The material of the sealing sleeve can be metal, plastic, rubber and the like. The sealing sleeve material is hpb58-3A, and has good wear resistance and high strength. After the sealing sleeve is meshed with the shell gear, the valve rod is better limited to move upwards, the valve core cannot lose efficacy due to the fact that the valve rod moves up and down, and the sealing sleeve is meshed with the shell gear, so that the service life of the valve core is prolonged. Anaerobic adhesive is coated at the threaded connection part of the sealing sleeve and the shell, so that the sealing sleeve and the shell are connected more tightly.

Furthermore, the position of the sealing section relative to the sealing sleeve is provided with a first inwards-concave annular sealing groove, the width of the first annular sealing groove is smaller than the height of the sealing sleeve, and a first sealing element is placed in the first annular sealing groove.

In foretell leak protection water tap case, annular seal groove one sets up in the position relative with the seal cover, through the sealing member one of placing in the annular seal groove one, strengthens the leakproofness between seal cover and the valve rod for whole sealed effect is better, prolongs the life of leak protection water tap case. The first annular sealing groove is arranged on the sealing section because the width of the sealing sleeve is smaller, if the annular groove reduces the strength of the sealing sleeve, the sealing sleeve is broken, and therefore the annular groove is arranged on the sealing section in order to guarantee the strength and the sealing effect of the sealing sleeve. The sealing sleeve arranged on the sealing section is installed well, so that the sealing sleeve is conveniently and fixedly connected with the shell.

Furthermore, a positioning flange protrudes outwards from the upper end of the sealing sleeve, and the lower surface of the positioning flange abuts against the upper surface of the shell.

In foretell leak protection water tap case, the locating flange is outwards outstanding, and the lower surface of locating flange supports and leans on the upper surface of casing, prevents that the seal cover from moving downwards, and better fixed seal spare one can reach better sealed effect.

Further, the positioning flange is an outer hexagon. In the leak-proof faucet valve core, the outer hexagonal positioning flange is convenient to mount and dismount.

Furthermore, a second sealing element is arranged between the sealing sleeve and the shell. And a second annular sealing groove which is inwards sunken is arranged between the positioning flange and the outer gear of the sealing sleeve, and a second sealing element is placed in the second annular sealing groove. In the leakproof water tap valve core, the upper side wall of the second annular sealing groove is flush with the lower surface of the positioning flange, the second annular sealing groove and the inner wall of the shell form a closed space for placing the second sealing element, and the second sealing element strengthens the sealing property between the shell and the sealing sleeve, so that the whole sealing effect is better, and the service life of the leakproof water tap valve core is prolonged.

Furthermore, the upper end of the sealing section is provided with an annular positioning groove, a positioning piece is arranged in the annular positioning groove, and the lower surface of the positioning piece is abutted against the upper surface of the sealing sleeve.

In the valve core of the anti-leakage water tap, the positioning part is preferably a snap spring. The annular positioning groove is formed in the upper end of the sealing section, the lower side face of the annular positioning groove is flush with the upper surface of the sealing sleeve when the annular positioning groove is installed, the inner end of the positioning piece is clamped in the annular positioning groove, the sealing sleeve is clamped at the other end of the positioning piece, the sealing sleeve cannot move upwards, the sealing sleeve is fixed better, and a better sealing effect is achieved. The clamp spring can prevent that the seal cover from becoming flexible, and seal cover and casing threaded connection scribble the anaerobic adhesive, make seal cover and casing connect more tightly, even the clamp spring drops, the connection of seal cover and casing fastening can not lead to the product to lose the function yet. The snap spring is easy to obtain in the market, is convenient to manufacture and saves cost. The circlip acts to prevent axial movement of the gland. The sealing sleeve can be better fixed, and a better sealing effect is achieved.

Furthermore, the valve rod comprises a threaded connection section, the threaded connection section can penetrate through the positioning convex ring to be in threaded connection with the threaded sleeve, the threaded connection section and the positioning section are connected through the convex ring installation section, and the convex ring installation section is in sealing connection with the positioning convex ring.

Furthermore, a threaded sleeve mounting cavity communicated with the mounting cavity is arranged in the lower end part of the shell, a transmission part is arranged in the threaded sleeve mounting cavity in an inward protruding mode, an inner hexagonal hole consistent with the axis of the positioning convex ring is arranged in the middle of the transmission part, the outer side wall of the threaded sleeve is an outer hexagonal cylinder matched with the inner hexagonal hole, a movable gap is formed between the upper end face of the transmission part and the lower end face of the positioning convex ring, the outer diameter of the threaded sleeve is larger than the inner diameter of the positioning convex ring, and a sealing gasket is fixedly connected to the lower end part of the threaded sleeve.

The anti-leakage water tap valve core can be suitable for stop valves, water mixing valves and the like. The inner hexagonal hole through the transmission part is matched with the outer hexagonal cylinder on the outer side wall of the threaded sleeve to move up and down, the valve rod is in threaded transmission connection with the threaded sleeve to drive the threaded sleeve to move up and down in the transmission part, the lower end of the threaded sleeve is fixedly connected with a sealing gasket, the sealing gasket descends to block the water through hole of the valve body, the stop valve can be closed, the sealing gasket ascends to open the water through hole of the valve body, and the stop valve can be opened.

Furthermore, one end of the valve rod, penetrating out of the positioning convex ring, is fixedly connected with a valve sleeve, the valve sleeve is fixedly connected with a movable valve plate, the movable valve plate rotates along with the rotation of the valve rod, and a water through hole and a plugging portion are arranged on the movable valve plate to realize the on-off of water flow.

In the above-mentioned leak protection tap case, the movable valve piece covers the water through hole, and when the valve rod rotates and drives the movable valve piece to rotate, the water through hole of the movable valve piece and the water through hole are communicated, and the water flow is opened, and the water flow is blocked when the water through hole is blocked by the blocking part of the movable valve piece. The water hole sets up inside the casing, and rivers come in and will go out through the water hole, and the shutoff portion of movable valve piece blocks off the rivers circulation when blockking up the water hole. When the limber hole of the movable valve plate is communicated with the water passing hole, the water flow circulation is opened.

Compared with the prior art, the utility model discloses a technological effect does: through the structure of the sealing sleeve per se and the mutual matching between the shell and the valve rod, and the combination of the sealing element II and the sealing sleeve III, the upper end part of the shell is well sealed with the valve rod.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is an exploded view of the present invention.

Figure 3 is a cross-sectional view of the sealing sleeve of the present invention.

Fig. 4 is a half-sectional perspective view of the housing of the present invention.

Fig. 5 is a front view of the valve stem of the present invention.

Fig. 6 is a cross-sectional view of the present invention.

Fig. 7 is a perspective sectional view of another embodiment of the present invention.

Marking the figure number: 1. a housing; 102. an internal gear; 2. a mounting cavity; 3. a valve stem; 301. a positioning section; 302. a sealing section; 303. a threaded connection section; 304. a convex ring mounting section; 4. positioning the convex ring; 5. a sealing sleeve; 501. an outer gear; 502. a positioning flange; 6. a first annular sealing groove; 7. a second annular sealing groove; 8. a first sealing element; 9. a second sealing element; 10. an annular positioning groove; 11. a positioning member; 12. a threaded sleeve; 13. a threaded sleeve mounting cavity; 14. a transmission section; 15. an inner hexagonal hole; 16. an outer hexagonal cylinder; 17. a gasket; 18. a valve housing; 19. a movable valve plate; 20. a water through hole; 21. a plugging section; 22. and a water through hole.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

According to fig. 1 to 6: the utility model provides a leak protection water tap case, which comprises a housin 1, installation cavity 2 that link up from top to bottom is provided with in the casing 1, rotatable installation has valve rod 3 in the installation cavity 2, the inside protrusion of 2 tip in installation cavity has location bulge loop 4, valve rod 3 is from last to having set gradually sealed section 302 down, location section 301, threaded connection section 303 and bulge loop installation section 304 in the valve rod 3 pass

location bulge loop

4 and 12 threaded connection of swivel nut, threaded connection section 303 and location section 301 pass through bulge loop installation section 304 and connect, bulge

loop installation section

304 and 4 sealing connection of location bulge loop. The inner wall of the shell 1 is provided with a thread insert mounting cavity 13 communicated with the mounting cavity 2, the thread insert mounting cavity 13 is inwardly protruded with a transmission part 14, the middle of the transmission part 14 is provided with an inner hexagonal hole 15 consistent with the axis of the positioning convex ring 4, the outer side wall of the thread insert 12 is an outer hexagonal cylinder 16 matched with the inner hexagonal hole 15, a movable gap is formed between the upper end surface of the transmission part 14 and the lower end surface of the positioning convex ring 4, the outer diameter of the thread insert 12 is larger than the inner diameter of the positioning convex ring 4, and the lower end part of the thread insert 12 is fixedly connected with a sealing gasket 17. The lower end face of location section 301 supports with the upper surface of location bulge loop 4 and leans on, and sealing section 302 external diameter is less than location section 301 external diameter, and the outside cover that sealing section 302 is located is equipped with seal cover 5, seal cover 5 and casing 1 fixed connection.

In foretell leak protection water tap case, including casing 1, valve rod 3 inserts in the installation cavity 2 from casing 1's upper end, 2 inside protruding location bulge loops 4 of installation cavity lower extreme, the external diameter of the sealed section 302 in the valve rod 3 is less than location section 301 external diameter, the lower surface of location section 301 supports and leans on the upper surface at location bulge loop 4 in the valve rod 3, valve rod 3 can not the downstream, sealed section 302 outside cover is equipped with seal cover 5, seal cover 5 is sealed fixed with casing 1, seal cover 5 keeps off valve rod 3 rebound, but valve rod 3 can rotate around self axis. The sealing sleeve 5 can ensure that the sealing effect at the joint of the upper end of the shell 1 and the sealing section 302 of the valve rod 3 is better. The valve rod 3 can not move up and down, so that the sealing sleeve 5 is better fixed at the joint of the upper end of the shell 1 and the sealing section 302 of the valve rod 3, and a plurality of sealing rings are also arranged between the positioning section 301 of the valve rod 3 and the shell 1, and the sealing effect of the whole valve core is multi-level. According to the scheme, the inner hexagonal hole 15 of the transmission part 14 is matched with the outer hexagonal cylinder 16 of the outer side wall of the screw sleeve 12 to move up and down, the valve rod 3 is in threaded transmission connection with the screw sleeve 12 to drive the screw sleeve 12 to move up and down in the transmission part 14, the lower end of the screw sleeve 12 is fixedly connected with the sealing gasket 17, the sealing gasket 17 descends to block the water through hole 20 of the valve body, the stop valve can be closed, the sealing gasket 17 ascends to open the water through hole 20 of the valve body, and the stop valve can be opened. The leak-proof faucet valve core has the advantages of good integral sealing performance, simple structure, convenient manufacture and cost saving.

According to fig. 1 to 5 and 7: the utility model provides a leak protection water tap case, which comprises a housin 1, be provided with the installation cavity 2 that link up from top to bottom in the casing 1, rotatable installation has valve rod 3 in the installation cavity 2, the inside protrusion of 2 tip in installation cavity has location bulge loop 4, valve rod 3 is from last to having set gradually sealing section 302 and location section 301 down, the lower terminal surface of location section 301 supports with the upper surface of location bulge loop 4 and leans on, sealing section 302 external diameter is less than location section 301 external diameter, one section outside cover that sealing section 302 is located casing 1 is equipped with seal cover 5, seal cover 5 and casing 1 fixed connection. One end of the valve rod 3 penetrating through the positioning convex ring 4 is fixedly connected with a valve sleeve 18, the valve sleeve 18 is fixedly connected with a movable valve plate 19, the movable valve plate 19 rotates along with the rotation of the valve rod 3, and a water through hole 20 and a blocking part 21 are arranged on the movable valve plate 19 to realize the on-off of water flow.

In foretell leak protection water tap case, including casing 1, the valve rod 3 inserts in the installation cavity 2 from casing 1's upper end, the inside protruding location bulge loop 4 of installation cavity 2 lower extreme, the external diameter of the seal section 302 in the valve rod 3 is less than location section 301 external diameter, the lower surface of location section 301 supports and leans on the upper surface at location bulge loop 4 in the valve rod 3, valve rod 3 can not the downstream, seal section 302 outside cover is equipped with seal cover 5, seal cover 5 is sealed fixed with casing 1, seal cover 5 keeps off valve rod 3 rebound, but valve rod 3 can rotate around self axis. The sealing sleeve 5 can make the sealing effect of the joint of the upper end of the shell 1 and the sealing section 302 of the valve rod 3 better. The valve rod 3 can not move up and down, so that the sealing sleeve 5 is better fixed at the joint of the upper end of the shell 1 and the sealing section 302 of the valve rod 3, and a plurality of sealing rings are also arranged between the positioning section 301 of the valve rod 3 and the shell 1, and the sealing effect of the whole valve core is multi-level. This scheme is through 1 inside water hole 22 that sets up of casing, and 1 interior rivers of casing will come in and will flow through water hole 22, and movable valve piece 19 covers water hole 22, rotates when valve rod 3 and drives valve barrel 18 and rotate, and movable valve piece 19 is fixed on valve barrel 18 and then when valve barrel 18 rotated, and the shutoff portion 21 of movable valve piece 19 blocks up the rivers circulation when crossing water hole 22. When the water through hole 20 and the water through hole 22 of the movable valve plate 19 are communicated, the water flow is opened. The leak-proof water tap valve core has the advantages of good overall sealing performance, simple structure, convenient manufacture and cost saving.

According to fig. 2 to 5: the seal cover 5 is provided with an external gear 501, and the upper end portion of the housing 1 is provided with an internal gear 102 that meshes with the external gear 501. The sealing sleeve 5 and the upper end portion of the housing 1 can be well fixed by the engagement of the internal gear 102 and the external gear 501, and the sealing sleeve 5 can be conveniently replaced when the sealing sleeve 5 is worn after being used for many times. The material of the sealing sleeve 5 may be metal, plastic, rubber, etc. The material of the sealing sleeve 5 is hpb58-3A, and the sealing sleeve has good wear resistance and high strength. After the sealing sleeve 5 is meshed with the gear of the shell 1, the upward movement of the valve rod 3 is better limited, the failure of the valve core caused by the vertical movement of the valve rod 3 is avoided, and the service life of the valve core is prolonged by the gear meshing of the sealing sleeve 5 and the shell 1.

The position of the sealing section 302 relative to the sealing sleeve 5 is provided with an annular sealing groove I6 which is sunken inwards, the width of the annular sealing groove I6 is smaller than the height of the sealing sleeve 5, and a sealing element I8 is arranged in the annular sealing groove I6. In foretell leak protection tap case, annular seal groove 6 sets up in the position relative with seal cover 5, through the sealing member 8 of placing in annular seal groove 6, strengthens the leakproofness between seal cover 5 and the valve rod 3 for whole sealed effect is better, prolongs the life of leak protection tap case. The annular sealing groove I6 is arranged on the sealing section 302 because the width of the sealing sleeve 5 is relatively small, if the annular groove reduces the strength of the sealing sleeve 5, the sealing sleeve 5 is broken, and therefore, in order to guarantee the strength and the sealing effect of the sealing sleeve 5, the annular groove is arranged on the sealing section 302. The sealing sleeve 5 arranged on the sealing section 302 is installed first, so that the sealing sleeve 5 is conveniently and fixedly connected with the shell 1.

The upper end of the sealing sleeve 5 is provided with a positioning flange 502 which protrudes outwards, and the lower surface of the positioning flange 502 is abutted with the upper surface of the shell 1. In the leakproof water tap valve core, the positioning flange 502 protrudes outwards, the lower surface of the positioning flange 502 abuts against the upper surface of the shell 1, the sealing sleeve 5 is prevented from moving downwards, the first sealing element 8 is fixed better, and a better sealing effect can be achieved. The locating flange 502 is an outer hex. In the leak-proof faucet valve core, the outer hexagonal positioning flange 502 is convenient to mount and dismount. And a second sealing element 9 is arranged between the sealing sleeve 5 and the shell 1. An annular sealing groove II 7 which is sunken inwards is formed between the positioning flange 502 and the outer gear 501 of the sealing sleeve 5, and a sealing element II 9 is placed in the annular sealing groove II 7. In the above-mentioned leak protection faucet case, the upper wall of the second annular seal groove 7 is flush with the lower surface of the positioning flange 502, the second annular seal groove 7 and the inner wall of the housing 1 form a closed space for placing the second sealing element 9, and the second sealing element 9 strengthens the sealing property between the housing 1 and the sealing sleeve 5, so that the whole sealing effect is better, and the service life of the leak protection faucet case is prolonged.

One end of the sealing section 302, which is exposed out of the casing 1, is provided with an inwardly recessed annular positioning groove 10, a positioning piece 11 is arranged in the annular positioning groove 10, and the sealing sleeve 5 can be clamped by the positioning piece 11. The positioning piece 11 is a clamp spring. In foretell leak protection tap case, expose one section inside sunken annular positioning groove 10 outside casing 1 at seal section 302, the downside of annular positioning groove 10 and the upper surface parallel and level of seal cover 5 when the installation, setting element 11 inner card is in annular positioning groove 10, and the other end blocks seal cover 5 for seal cover 5 can not shift up, with the better fixed of seal cover 5, reaches better sealed effect. The clamp spring is easy to obtain in the market, convenient to manufacture and cost-saving, and plays a role in preventing the sealing sleeve 5 from axially moving. So that the sealing sleeve 5 is better fixed and a better sealing effect is achieved.

Compared with the prior art, the utility model discloses a technological effect does: through the structure of seal cover 5 itself and mutually supporting between casing 1, the valve rod 3, including the combination of sealing member one 8 and sealing member two 9 with casing 1 upper end and valve rod 3 fine sealed, this leak protection tap case's whole sealing performance is good, simple structure, and it is convenient to make, practices thrift the cost.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a leak protection water tap case, includes casing (1), is provided with installation cavity (2) that link up from top to bottom in casing (1), rotatable installation valve rod (3) in installation cavity (2), the tip is inwards protruding to have location bulge loop (4), its characterized in that under installation cavity (2): valve rod (3) are from last to having set gradually sealing section (302) and location section (301) down, the lower terminal surface of location section (301) supports with the upper surface of location bulge loop (4) and leans on, sealing section (302) external diameter is less than location section (301) external diameter, sealing section (302) outside cover is equipped with seal cover (5), seal cover (5) and casing (1) fixed connection.

2. The leak-proof faucet valve cartridge of claim 1, characterized in that: the sealing sleeve (5) is provided with an external gear (501), and the upper end part of the shell (1) is provided with an internal gear (102) meshed with the external gear (501).

3. The leak-proof faucet valve cartridge of claim 2, wherein: the sealing segment (302) be provided with inside sunken annular seal groove (6) for the position of seal cover (5), the width of annular seal groove (6) is less than the height of seal cover (5), seal part (8) have been placed in annular seal groove (6).

4. The leak resistant faucet valve cartridge of claim 2, wherein: the sealing sleeve is characterized in that a positioning flange (502) protrudes outwards from the upper end of the sealing sleeve (5), and the lower surface of the positioning flange (502) is abutted against the upper surface of the shell (1).

5. The leak-proof faucet valve cartridge of claim 4, wherein: the positioning flange (502) is an outer hexagon.

6. The leak resistant faucet valve cartridge of claim 2, wherein: and a second sealing element (9) is arranged between the sealing sleeve (5) and the shell (1).

7. The leak-proof faucet valve core as claimed in any one of claims 1 to 6, wherein: the sealing device is characterized in that an annular positioning groove (10) is formed in the upper end of the sealing section (302), a positioning piece (11) is arranged in the annular positioning groove (10), and the lower surface of the positioning piece (11) is abutted to the upper surface of the sealing sleeve (5).

8. The leak-proof faucet valve cartridge of claim 1, wherein: the valve rod (3) comprises a threaded connection section (303), the threaded connection section (303) can penetrate through the positioning convex ring (4) to be in threaded connection with the thread sleeve (12), the threaded connection section (303) and the positioning section (301) are connected through a convex ring installation section (304), and the convex ring installation section (304) is in sealing connection with the positioning convex ring (4).

9. The leak-proof faucet valve cartridge of claim 8, wherein: the improved nut positioning device is characterized in that a nut mounting cavity (13) communicated with the mounting cavity (2) is formed in the lower end portion of the shell (1), a transmission portion (14) protrudes inwards from the nut mounting cavity (13), an inner hexagonal hole (15) consistent with the axis of the positioning convex ring (4) is formed in the middle of the transmission portion (14), the outer side wall of the nut (12) is an outer hexagonal cylinder (16) matched with the inner hexagonal hole (15), a movable gap is formed between the upper end face of the transmission portion (14) and the lower end face of the positioning convex ring (4), the outer diameter of the nut (12) is larger than the inner diameter of the positioning convex ring (4), and a sealing gasket (17) is fixedly connected to the lower end portion of the nut (12).

10. The leak-proof faucet valve cartridge of claim 1, wherein: one end, penetrating out of the positioning convex ring (4), of the valve rod (3) is fixedly connected with a valve sleeve (18), the valve sleeve (18) is fixedly connected with a movable valve plate (19), the movable valve plate (19) rotates along with the rotation of the valve rod (3), and a water through hole (20) and a blocking portion (21) are formed in the movable valve plate (19) to achieve the on-off of water flow.