CN214331509U

CN214331509U - Valve core

Info

Publication number: CN214331509U
Application number: CN202120340347.6U
Authority: CN
Inventors: 杨根葆
Original assignee: Yuhuan Kebi Hvac Technology Co ltd
Current assignee: Yuhuan Kebi Hvac Technology Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-10-01
Anticipated expiration: 2031-02-05

Abstract

The utility model provides a valve core belongs to valve technical field. It has solved the current poor scheduling problem of case flow control nature. This case, including separately valve cap and the disk seat that sets up, be provided with the connecting hole in the valve cap, wear to be equipped with axial fixity's valve rod and circumference fixed lifter in the connecting hole, the lower extreme of valve rod and the upper end threaded connection of lifter, the valve rod can be at the downthehole circumferential direction of connecting, and can drive the lifter oscilaltion during the valve rod circumferential direction, be provided with the control hole in the disk seat, the lower extreme of lifter has the control head, the control head is inserted and is established in the control hole, cross the discharge orifice has been seted up on the lower terminal surface of control head, be provided with the accuse flow mouth that is the shape of falling V on the lateral surface of control head, it is linked together with crossing the discharge orifice to control the flow mouth, it still is provided with and is annular seal groove to lie in the top of accuse flow mouth on the lateral surface of control head, the seal groove internal fixation has the sealing washer, the sealing washer can enter into the control hole and paste and lean on the hole wall face in the control hole. The valve core improves the flow regulation.

Description

Valve core

Technical Field

The utility model belongs to the technical field of the valve, a case is related to.

Background

The floor cooling and heating system is a cooling and heating system which conveys cold water or hot water to a water pipe network under the floor and achieves the purposes of cooling or heating through the floor in a radiation and convection heat transfer mode. The floor cooling and heating system comprises a water distributor and a water collector, wherein valves are arranged on the water distributor and the water collector, water pipes are connected between the water distributor and the water collector and are distributed below the floor, and the water distributor and the water collector are important components of the floor cooling and heating system.

Chinese patent document discloses a valve with a water separator [ application No.: CN201521111922.6, publication No.: CN205446815U ], which comprises a valve body, the valve body is provided with the inlet channel, delivery port and control port, control port department installs the water knockout drum, the water knockout drum includes the valve rod, go up the valve rod and see through control port fixedly connected with hand wheel, the lower extreme of going up the valve rod is connected with twists the lower valve rod that the hand wheel can reciprocate, the lower limit that the lower valve rod moved down is for enabling the water knockout drum to close the position of delivery port, the upper end of going up the valve rod is equipped with round valve rod buckle groove, correspond on the hand wheel and be provided with the elasticity buckle that matches with valve rod buckle groove, the lower pot head of lower valve rod is equipped with soft sealing washer and the hard sealing washer of sealed delivery port when closing the delivery port.

When the valve adjusts the flow, the hand wheel rotates to drive the upper valve rod to rotate, the upper valve rod rotates to drive the lower valve rod to move up and down, after the soft sealing ring is separated from the water outlet, when the lower valve rod moves up, the gap between the upper edges of the soft sealing ring and the water outlet is enlarged, the valve opening is enlarged, the flow of the valve is enlarged, when the lower valve rod moves down, the gap between the upper edges of the soft sealing ring and the water outlet is reduced, the valve opening is reduced, and the flow of the valve is reduced. Because the flow is adjusted through the change of the annular gap between the soft sealing ring and the upper edge of the water outlet, the stroke of flow adjustment is short, the maximum flow can be reached in a short stroke when the lower valve rod moves upwards, the valve can be closed in a short stroke when the lower valve rod moves downwards, the flow control curve is steep, and the flow adjustment performance is poor.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a case, solved the poor technical problem of current case flow control nature.

The purpose of the utility model can be realized by the following technical proposal:

a valve core comprises a valve cap and a valve seat which are separately arranged, a connecting hole is arranged in the valve cap, a valve rod which is axially fixed and a lifting rod which is circumferentially fixed penetrate through the connecting hole, the lower end of the valve rod is in threaded connection with the upper end of the lifting rod, the valve rod can circumferentially rotate in the connecting hole, and the valve rod can drive the lifting rod to lift up and down when rotating circumferentially, a control hole is arranged in the valve seat, the lower end of the lifting rod is provided with a control head, it is characterized in that the control head is inserted in the control hole, the lower end surface of the control head is provided with an overflowing hole, the outer side surface of the control head is provided with an inverted V-shaped flow control port which is communicated with the overflowing hole, the lateral surface of the control head is positioned above the flow control port and is also provided with an annular sealing groove, a sealing ring is fixed in the sealing groove, and the sealing ring can enter the control hole and is attached to the wall surface of the control hole.

When the flow is regulated, the valve rod rotates to drive the lifting rod to lift up and down, the control head lifts up and down in the control hole, the area of the flow control port exposed out of the valve seat changes, namely, the opening of the valve core is changed, and therefore the flow is regulated. The area that the flow opening exposes the disk seat becomes when the lifter rises, and the flow grow, and the area that the flow opening exposes the disk seat becomes littleer when the lifter descends, and the flow diminishes, when the lifter descends to the sealing washer and enters into the control hole, then closes the valve. The flow control port is in an inverted V shape, and the annular gap for controlling the flow is changed into an arc-shaped section, so that the stroke of flow regulation can be increased, a more stable flow control curve is formed, and the flow regulation performance is improved. The setting of overflowing hole makes during water can steadily enter into the control hole of disk seat through overflowing hole buffering back behind the accuse mouth, makes rivers flow out spool stable.

In addition, the control head of the valve core is inserted into the control hole of the valve seat, the sealing ring is attached to the hole wall surface of the control hole, and side face sealing is adopted, so that compared with end face sealing formed by abutting the sealing gasket on the upper end face of the valve seat, the adhesion and suction between the sealing ring and the valve seat can be avoided, the lifting rod can flexibly lift, the normal use of the sealing ring is ensured, and the flow regulation and control of the valve core are accurate. And the case adopts spiral elevation structure, compares in adopting the spring to carry out the structure that goes up and down, has reduced the influence of incrustation scale to the lifter, guarantees the effective lift of lifter.

In the valve core, the flow control ports are provided with a plurality of flow control ports which are circumferentially and uniformly arranged. The control head is arranged to enable water to smoothly pass through the control head, so that the water outlet flow can be improved, and the requirement of multiple connection is met.

In the valve core, a convex shoulder is arranged on the outer side surface of the valve cap, and a positioning convex strip arranged along the axial direction and a clamping groove annularly arranged along the circumferential direction are arranged on the outer side surface of the convex shoulder.

The valve core can be connected with an actuator, the actuator is provided with a positioning groove matched with the positioning convex strip and a clamping protrusion matched with the clamping groove, the positioning convex strip is used for realizing circumferential fixation of the actuator and the valve core, the clamping groove is used for realizing axial fixation of the actuator and the valve core, and the actuator and the valve core are conveniently fixed by the positioning convex strip and the clamping groove.

In the above valve core, the positioning convex strips are provided with a plurality of positioning convex strips and are uniformly distributed along the circumferential direction. Utilize the location sand grip to realize assembly and disassembly tools's location, the location sand grip has the several and can make valve cap dismouting in-process atress even along circumference evenly distributed, makes valve cap easy dismounting on the valve body.

In the above valve body, a guide surface is provided between an upper end surface of the bonnet and an outer side surface of the shoulder portion. The guide surface has a guide function, and the assembly between the actuator and the valve core is convenient.

In the valve core, a hexagonal prism part is arranged above the control head on the lifting rod, and a hexagonal prism hole section matched with the hexagonal prism part is arranged in the connecting hole.

The cooperation of hexagonal prism portion and hexagonal hole section makes and realizes circumference fixed between valve rod and the lifter to guarantee that the lifter can the oscilaltion under the drive of valve rod.

In foretell case, the upper end of valve rod has the connector that stretches out the valve cap, be provided with the external splines on the lateral surface of connector, be provided with the screw hole on the up end of connector. The external splines and the threaded holes are arranged simultaneously, so that the valve rod is conveniently connected with a hand wheel or an actuator.

In foretell case, the case is installed in the valve body, be provided with mounting hole and apopore on the valve body, have on the valve cap and can insert in the mounting hole and form threaded connection's valve cap screw thread section with the mounting hole, have on the disk seat and can insert in the apopore and form threaded connection's disk seat screw thread section with the apopore, it keeps off the shoulder to have on the hole wall of connecting hole, convex fender ring has on the lateral surface of valve rod, keep off the ring and be located the below that keeps off the shoulder and support and lean on and keep off on the shoulder, the top that lies in the valve cap on the lateral surface of valve rod is provided with the draw-in groove, the draw-in groove internal fixation has the elasticity rand, the elasticity rand supports and leans on the up end of valve cap.

During the equipment, fix the sealing washer in the seal groove earlier, with lifter threaded connection on the valve rod, then insert the connecting hole with valve rod and lifter from the lower port of connecting hole in, keep off the ring and lean on keeping off the lower terminal surface of shoulder, again with in the elasticity rand imbeds the draw-in groove, the elasticity rand supports and leans on the up end of valve cap, has just so installed valve rod and lifter on the valve cap. Then the valve cap thread section is inserted into and screwed into the mounting hole of the valve body, the valve seat thread section is inserted into and screwed into the water outlet hole of the valve body, the upper end of the valve rod is rotated to enable the lifting rod to descend, the inspection control head can be inserted into the control hole of the valve seat, and the sealing ring enters the control hole and is attached to the wall surface of the control hole. When the water leakage needs to be returned, the workpiece needs to be checked, if the size of the lifting rod is qualified, whether the sealing ring is complete or not, whether the sealing ring is installed in place or not, whether the size of a control hole of the valve seat is qualified or not, the valve cap can be detached from the mounting hole of the valve body, the elastic clamping ring is detached to enable the valve rod and the lifting rod to be detached from the connecting hole, the valve seat is detached from the water outlet hole of the valve body, the part can be detected and repaired after the valve seat is detached, and the whole valve body is guaranteed to meet the use requirement when leaving the factory. This case can be dismantled after the installation and get off and reprocess, has avoided scrapping of whole valve, has reduced manufacturing cost.

In the valve core, a plurality of O-shaped rings are arranged between the clamping groove and the blocking ring on the outer side surface of the valve rod. O type circle has sealed effect, and the leakproofness between valve rod and the valve cap has been guaranteed in the setting up of several O type circle.

In the valve core, a convex ring is arranged on the outer side surface of the valve seat and below the valve seat thread section, the outer side surface of the convex ring is a hexagonal prism surface, and the convex ring can abut against the valve body. The bulge loop has the axial positioning effect, and the lateral surface of bulge loop is used for assembly and disassembly tools's circumference location, and the setting up of bulge loop makes disk seat easy dismounting on the valve body.

Compared with the prior art, the utility model has the advantages of it is following:

the control head of the lifting rod uses the overflowing hole and the flow control port, so that the effective stroke of opening degree adjustment is improved, and the adjustability of circulation is improved. This case can dismantle after the installation on the valve body and reprocess, avoids the whole scrapping of valve, has reduced manufacturing cost. Adopt spiral elevation structure, need not the spring, do not receive the scale deposit chucking influence, adopt side seal, no adhesive force suction, long service life. The valve cap is provided with a positioning raised line, a clamping groove and a guide surface, and the connecting head of the valve rod is provided with an external spline and a threaded hole, so that the valve core and the actuator can be conveniently installed and fixed.

Drawings

FIG. 1 is a cross-sectional view of the present valve cartridge when mounted on a valve body;

fig. 2 is an exploded view of the present valve cartridge.

In the figure, 1, a valve body; 1a, mounting holes; 1b, water outlet holes; 2. a bonnet; 2a, connecting holes; 2a1, shoulder; 2a2, hexagonal prism hole section; 2b, a bonnet thread section; 2c, a shoulder; 2c1, positioning convex strips; 2c2, a clamping groove; 2d, a guide surface; 3. a valve seat; 3a, control holes; 3b, valve seat thread section; 3c, a convex ring; 4. a valve stem; 4a, a baffle ring; 4b, a clamping groove; 4c, a connector; 4c1, external splines; 4c2, threaded hole; 4d, an O-shaped ring; 4e, a thread lifting section; 5. a lifting rod; 5a, a control head; 5a1, a seal groove; 5a2, sealing ring; 5a3, flow control port; 5a4, overflow aperture; 5b, hexagonal prism parts; 5c, a threaded lifting hole; 6. an elastic collar.

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.

Example one

As shown in fig. 1 and fig. 2, a valve element is installed in a valve body 1, a mounting hole 1a and a water outlet hole 1b are formed in the valve body 1, and the valve element includes a valve cap 2 which can be detachably and fixedly connected in the mounting hole 1a and a valve seat 3 which can be detachably and fixedly connected in the water outlet hole 1 b.

A connecting hole 2a is formed in the bonnet 2, a retaining shoulder 2a1 is arranged on the hole wall surface of the connecting hole 2a, a hexagonal prism hole section 2a2 is arranged in the connecting hole 2a, and the hexagonal prism hole section 2a2 is positioned below the retaining shoulder 2a 1. The bonnet 2 is provided with a bonnet thread section 2b which can be inserted into the mounting hole 1a and is in threaded connection with the mounting hole 1a, a convex shoulder part 2c is arranged on the outer side surface of the bonnet 2 above the bonnet thread section 2b, and the convex shoulder part 2c can abut against the upper hole edge of the mounting hole 1a of the valve body 1. The bonnet 2 is sleeved with a bonnet sealing ring, the bonnet sealing ring is positioned between the shoulder part 2c and the bonnet thread section 2b, and the bonnet sealing ring can abut against the valve body 1 to form sealing. The outer side surface of the shoulder portion 2c is provided with a positioning convex strip 2c1 arranged along the axial direction and a clamping groove 2c2 arranged along the circumferential direction, and a guide surface 2d arranged obliquely is arranged between the upper end surface of the bonnet 2 and the outer side surface of the shoulder portion 2 c. The positioning ribs 2c1 are provided in plural and uniformly distributed in the circumferential direction, and the number of the positioning ribs 2c1 is set in accordance with the size of the bonnet 2 and the size of the positioning ribs 2c 1. The valve core can be connected with an actuator, the actuator is provided with a positioning groove matched with the positioning convex strip 2c1 and a clamping protrusion matched with the clamping groove 2c2, the positioning convex strip 2c1 is used for realizing circumferential fixation of the actuator and the valve bonnet 2, and the clamping groove 2c2 is used for realizing axial fixation of the actuator and the valve bonnet 2.

The upper end of the valve seat 3 is provided with a valve seat threaded section 3b which can be inserted into the water outlet hole 1b and is in threaded connection with the water outlet hole 1 b. The convex ring 3c is arranged below the valve seat thread section 3b on the outer side surface of the valve seat 3, and the convex ring 3c can abut against the lower hole edge of the water outlet hole 1b of the valve body 1. The valve seat 3 is externally sleeved with a valve seat sealing ring, the valve seat sealing ring is positioned between the valve seat thread section 3b and the convex ring 3c, and the valve seat sealing ring can abut against the valve body 1 to form sealing. The outer side surface of the convex ring 3c is a hexagonal prism surface. A control hole 3a is arranged in the valve seat 3, and the hole wall surface at the upper part of the control hole 3a is a cylindrical surface. The hole wall surface in the middle of the control hole 3a is provided with a positioning section for positioning with a wrench, the positioning section is arranged in a protruding mode, and the positioning section is a hexagonal prism surface hole. The lower extreme of disk seat 3 has the linkage segment, has the external screw thread on the lateral surface of linkage segment, and the linkage segment can with water piping connection.

An axially fixed valve rod 4 and a circumferentially fixed lifting rod 5 penetrate through the connecting hole 2a of the bonnet 2. The outer side surface of the valve rod 4 is provided with a convex retaining ring 4a, the retaining ring 4a is positioned below the retaining shoulder 2a1 and is abutted against the retaining shoulder 2a1, the outer side surface of the valve rod 4 is positioned above the valve cap 2 and is provided with a clamping groove 4b, an elastic clamping ring 6 is fixed in the clamping groove 4b, and the elastic clamping ring 6 is abutted against the upper end surface of the valve cap 2. Be located on the lateral surface of valve rod 4 and be provided with the fixed slot between draw-in groove 4b and the fender ring 4a, the fixed slot internal fixation has O type circle 4d, and the fixed slot has the several, and every fixed slot internal fixation has an O type circle 4 d. The number of the fixing grooves may be two, three or four. The upper end of the valve rod 4 is provided with a connector 4c extending out of the valve cap 2, the outer side surface of the connector 4c is provided with an external spline 4c1, and the upper end surface of the connector 4c is provided with a threaded hole 4c 2. The external spline 4c1 and the threaded hole 4c2 are arranged at the same time, so that the valve rod 4 can be conveniently connected with a hand wheel or an actuator. A thread lifting section 4e is arranged below the stop ring 4a on the valve rod 4, and the thread lifting section 4e is in threaded connection with the upper end of the lifting rod 5. The valve rod 4 can rotate in the circumferential direction in the connecting hole 2a, and the lifting rod 5 can be driven to lift up and down when the valve rod 4 rotates in the circumferential direction.

The upper end surface of the lifting rod 5 is provided with a threaded lifting hole 5c, and a threaded lifting section 4e is inserted into the threaded lifting hole 5c and forms threaded connection. The lower end of the lifting rod 5 has a control head 5a inserted in the control hole 3 a. The lifter 5 has a hexagonal prism portion 5b above the control head 5a, and the hexagonal prism portion 5b is engaged with the hexagonal prism hole section 2a2 to fix the lifter 5 in the inner circumferential direction of the coupling hole 2a and to allow the lifter 5 to move up and down in the coupling hole 2 a. The lower end face of the control head 5a can abut against the upper end face of the control hole 3a positioning section, and when the lower end face of the control head 5a abuts against the upper end face of the control hole 3a positioning section, the valve rod 4 and the lift lever 5 are kept in threaded connection and the upper end of the hexagonal column part 5b is kept in the hexagonal hole section 2a 2. An annular sealing groove 5a1 is provided on the outer side surface of the control head 5a, a sealing ring 5a2 is fixed in the sealing groove 5a1, and the sealing ring 5a2 can enter the control hole 3a and abut against the hole wall surface of the control hole 3 a. An overflowing hole 5a4 is formed in the lower end face of the control head 5a, an inverted V-shaped flow control port 5a3 is further formed in the outer side face of the control head 5a and located below the sealing groove 5a1, and the flow control port 5a3 is communicated with the overflowing hole 5a 4. The flow control ports 5a3 are provided with a plurality of flow control ports which are uniformly arranged in the circumferential direction, and in the embodiment, three flow control ports 5a3 are provided, and one or two or four flow control ports can be provided.

During assembly, the sealing ring 5a2 is fixed in the sealing groove 5a1, the lifting rod 5 is connected to the valve rod 4 in a threaded mode, the valve rod 4 and the lifting rod 5 are inserted into the connecting hole 2a from the lower end opening of the connecting hole 2a, the blocking ring 4a abuts against the lower end face of the blocking shoulder 2a1, the elastic clamping ring 6 is embedded into the clamping groove 4b, the elastic clamping ring 6 abuts against the upper end face of the valve cap 2, and therefore the valve rod 4 and the lifting rod 5 are installed on the valve cap 2. Then, the bonnet thread section 2b is inserted into and screwed into the mounting hole 1a of the valve body 1, the valve seat thread section 3b is inserted into and screwed into the water outlet hole 1b of the valve body 1, the upper end of the valve rod 4 is rotated to enable the lifting rod 5 to descend, the inspection control head 5a can be inserted into the control hole 3a of the valve seat 3, and the sealing ring 5a2 enters the control hole 3a and is attached to the wall surface of the control hole 3 a. When the water leakage needs to return, the workpiece needs to be checked, if the size of the lifting rod 5 is qualified, whether the sealing ring 5a2 is complete, whether the sealing ring 5a2 is installed in place, whether the size of the control hole 3a of the valve seat 3 is qualified, etc., the valve cap 2 can be detached from the mounting hole 1a of the valve body 1, the elastic clamping ring 6 is detached to enable the valve rod 4 and the lifting rod 5 to be detached from the connecting hole 2a, the valve seat 3 is detached from the water outlet hole 1b of the valve body 1, the part can be detected and repaired after the detachment, and the use requirement of the whole valve body 1 is met when the valve body leaves the factory. This case can be dismantled after the installation and get off and reprocess, has avoided scrapping of whole valve, has reduced manufacturing cost.

During flow regulation, the valve rod 4 rotates to drive the lifting rod 5 to lift up and down, the control head 5a lifts up and down in the control hole 3a, the area of the flow control port 5a3 exposed out of the valve seat 3 changes, namely, the opening degree of the valve core is changed, and therefore flow is regulated. When the lift lever 5 is raised, the area of the flow port 5a3 exposed to the valve seat 3 is increased, the flow rate is increased, and when the lift lever 5 is lowered, the area of the flow port 5a3 exposed to the valve seat 3 is decreased, the flow rate is decreased, and when the lift lever 5 is lowered until the seal ring 5a2 enters the control hole 3a, the valve is closed. The flow control port 5a3 is in an inverted V shape, and changes the existing annular gap for controlling flow into an arc-shaped section, thereby increasing the stroke of flow regulation, forming a more stable flow control curve and improving the flow regulation performance. The overflowing hole 5a4 is arranged to make water flow through the flow control port 5a3, buffered by the overflowing hole 5a4, and smoothly enter the control hole 3a of the valve seat, so that the water flow is stabilized when the water flows out of the valve core.

In addition, the control head 5a of the valve core is inserted into the control hole 3a of the valve seat 3, the sealing ring 5a2 is attached to the hole wall surface of the control hole 3a, and side face sealing is adopted, compared with end face sealing formed by abutting a sealing gasket against the upper end face of the valve seat 3, adhesion and suction force between the sealing ring 5a2 and the valve seat 3 can be avoided, so that the lifting rod 5 can flexibly lift, the normal use of the sealing ring 5a2 is ensured, the flow of the valve core is accurately regulated and controlled, and the service life is prolonged. And the case adopts spiral elevation structure, compares in adopting the spring to carry out the structure that goes up and down, has reduced the influence of incrustation scale to lifter 5, guarantees the effective lift of lifter 5. The overflowing hole 5a4 and the flow control port 5a3 can ensure the effective stroke of opening adjustment between the lifting rod 5 and the valve seat 3, and can also increase the aperture of the control hole 3a, improve the water outlet flow and meet the requirement of multiple connection.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A valve core comprises a valve cap (2) and a valve seat (3) which are separately arranged, a connecting hole (2a) is formed in the valve cap (2), a valve rod (4) which is axially fixed and a lifting rod (5) which is circumferentially fixed are arranged in the connecting hole (2a) in a penetrating mode, the lower end of the valve rod (4) is in threaded connection with the upper end of the lifting rod (5), the valve rod (4) can rotate in the connecting hole (2a) in the circumferential direction and can drive the lifting rod (5) to lift up and down when the valve rod (4) rotates in the circumferential direction, a control hole (3a) is formed in the valve seat (3), the lower end of the lifting rod (5) is provided with a control head (5a), the valve core is characterized in that the control head (5a) is inserted into the control hole (3a), a through-flow hole (5a4) is formed in the lower end face of the control head (5a), and a flow control port (5a3) which is inverted V-shaped is formed in the outer side face of the control head (5a), accuse mouth (5a3) is linked together with overflowing hole (5a4), lie in the top of accuse mouth (5a3) on the lateral surface of control head (5a) and still be provided with and be annular seal groove (5a1), seal groove (5a1) internal fixation has sealing washer (5a2), sealing washer (5a2) can enter into in control hole (3a) and paste on the hole wall face in control hole (3 a).

2. The valve cartridge according to claim 1, wherein the flow control ports (5a3) are provided in a plurality and are circumferentially and uniformly arranged.

3. The valve core according to claim 1, characterized in that a shoulder part (2c) is arranged on the outer side surface of the valve cap (2), and a positioning convex strip (2c1) arranged along the axial direction and a clamping groove (2c2) arranged along the circumferential direction are arranged on the outer side surface of the shoulder part (2 c).

4. The valve cartridge according to claim 3, wherein the positioning ribs (2c1) are provided in a plurality and are uniformly distributed in the circumferential direction.

5. The valve cartridge according to claim 3, characterized in that an obliquely arranged guide surface (2d) is provided between the upper end surface of the bonnet (2) and the outer side surface of the shoulder portion (2 c).

6. The valve cartridge according to any one of claims 1 to 5, wherein the lifter (5) has a hexagonal cylindrical portion (5b) above the control head (5a), and the coupling hole (2a) has a hexagonal cylindrical hole section (2a2) therein, which is engaged with the hexagonal cylindrical portion (5 b).

7. The valve core according to any one of claims 1 to 5, wherein the upper end of the valve rod (4) is provided with a connector (4c) extending out of the valve cap (2), an outer side surface of the connector (4c) is provided with an external spline (4c1), and an upper end surface of the connector (4c) is provided with a threaded hole (4c 2).

8. The valve cartridge according to any one of claims 1 to 5, wherein the valve cartridge is installed in a valve body (1), the valve body (1) is provided with a mounting hole (1a) and a water outlet hole (1b), the bonnet (2) is provided with a bonnet threaded section (2b) which can be inserted into the mounting hole (1a) and is in threaded connection with the mounting hole (1a), the valve seat (3) is provided with a valve seat threaded section (3b) which can be inserted into the water outlet hole (1b) and is in threaded connection with the water outlet hole (1b), the hole wall surface of the connecting hole (2a) is provided with a retaining shoulder (2a1), the outer side surface of the valve rod (4) is provided with a protruding retaining ring (4a), the retaining ring (4a) is located below the retaining shoulder (2a1) and abuts against the retaining shoulder (2a1), the outer side surface of the valve rod (4) is provided with a bonnet clamping groove (4b) located above the bonnet (2), draw-in groove (4b) internal fixation has elasticity rand (6), elasticity rand (6) support and lean on the up end of valve cap (2).

9. The valve cartridge according to claim 8, characterized in that several O-rings (4d) are arranged on the outer side of the valve stem (4) between the clamping groove (4b) and the stop ring (4 a).

10. The valve cartridge according to claim 8, wherein the outer side surface of the valve seat (3) below the valve seat threaded section (3b) has a convex ring (3c), the outer side surface of the convex ring (3c) is hexagonal prism surface, and the convex ring (3c) can abut on the valve body (1).