CN219975358U - Cut-off type filter valve - Google Patents

Abstract

The stop type filter valve comprises a valve body, a water inlet joint arranged on the left side of the valve body and a water outlet joint arranged on the right side of the valve body, wherein an opening and closing seat is arranged on the inner wall of the lower side of the valve body; the center of the upper surface of the opening and closing seat is provided with an opening and closing hole; the hole at the upper end of the opening hole is provided with a sealing step; the sealing step is provided with a sealing ring matched with the sealing step, and the sealing ring is made of PTFE (polytetrafluoroethylene) material; the upper surface of the valve body is provided with a valve rod seat corresponding to the opening and closing seat; the center of the upper surface of the valve rod seat is provided with a fixed screw hole communicated with the inner space of the valve body; the fixed screw hole is internally and spirally connected with a lifting seat matched with the fixed screw hole; the lifting seat is provided with an opening and closing structure matched with the lifting seat. The stop type filter valve provided by the utility model has the effect of filtering water flow, can effectively avoid the influence of impurities in the water flow on the opening and closing of the filter valve, and can effectively ensure the tightness of the filter valve when the filter valve is closed, so that the water leakage is avoided.

Description

Cut-off type filter valve

Technical Field

The utility model relates to a filter valve, in particular to a stop filter valve.

Background

The filter valve is a valve capable of filtering water flow of the filter valve, the traditional filter valve adopts a ball valve structure, the rotation of the valve ball inside the valve body is utilized to realize the communication between the water inlet joint and the water outlet joint, so that the filter valve is opened and closed, when the filter valve needs to be closed, the hand wheel is rotated again, the hand wheel drives the valve ball to rotate through the valve rod, when the valve ball rotates, the angle of an opening and closing hole penetrating through the center of the valve ball can be changed, and finally, the opening and closing hole openings at two ends are opposite to the inner wall of the valve body, and at the moment, the inner wall of the valve body shields and seals the opening and closing hole openings at two ends, so that the water inlet joint and the water outlet joint cannot communicate.

The filtration of traditional filter valve sets up in the rear of valve ball generally, consequently, the rivers of the opening hole in valve ball center still be the sewage that has the impurity, when the valve ball was realized opening and close of filter valve through rotatory, tiny impurity in the rivers very easily seepage to the clearance between valve ball outer wall and the valve body inner wall, in order to avoid above-mentioned problem, then can set up the rubber circle in valve ball both sides, and the valve ball long-term rotation then can oppress and pull the rubber circle, it is very easy ageing not hard up to lead to the rubber circle, life-span is extremely short, when the rubber circle is not hard up, tiny impurity in the rivers still can leak to the clearance between valve ball outer wall and the valve body inner wall in, the existence of tiny impurity can not only lead to the condition that stagnates when the valve ball is rotatory, in severe, the valve ball is more the card is dead, unable rotation, and the existence of tiny impurity then can increase the frictional force when the valve ball is rotatory, aggravate the wearing and tearing of valve ball outer wall, finally lead to the clearance between valve ball outer wall and the valve body inner wall grow, finally cause serious problem of leaking.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the cut-off type filter valve, which not only has the effect of filtering water flow, but also can effectively avoid the influence of impurities in the water flow on the opening and closing of the filter valve, and simultaneously effectively ensure the tightness of the filter valve when the filter valve is closed and avoid the condition of water leakage.

The technical scheme adopted for solving the technical problems is as follows:

the utility model discloses a stop type filter valve, which comprises a valve body, a water inlet joint arranged on the left side of the valve body and a water outlet joint arranged on the right side of the valve body, wherein an opening and closing seat is arranged on the inner wall of the lower side of the valve body; the center of the upper surface of the opening and closing seat is provided with an opening and closing hole; the hole at the upper end of the opening hole is provided with a sealing step; the sealing step is provided with a sealing ring matched with the sealing step, and the sealing ring is made of PTFE (polytetrafluoroethylene) material; the upper surface of the valve body is provided with a valve rod seat corresponding to the opening and closing seat; the center of the upper surface of the valve rod seat is provided with a fixed screw hole communicated with the inner space of the valve body; the fixed screw hole is internally and spirally connected with a lifting seat matched with the fixed screw hole; the lifting seat is provided with an opening and closing structure matched with the lifting seat; the opening and closing structure comprises an opening and closing core; the lower end of the opening and closing core is provided with an opening and closing head which can plug and seal the inner hole of the sealing ring; a water stop plate positioned on the right side of the opening and closing core is arranged between the outer edge of the upper surface of the opening and closing seat and the inner wall of the valve body; the lower surface of the valve body is provided with a filtering structure, and the opening and closing hole is communicated with the water outlet joint through the filtering structure.

The opening and closing structure also comprises a valve rod hole arranged in the center of the upper surface of the lifting seat; the lower surface of the lifting seat is provided with a moving hole communicated with the valve rod hole, and the diameter of the moving hole is larger than that of the valve rod hole; the inner wall of the hole at the lower end of the moving hole is provided with an annular limiting part, and the inner wall of the limiting part is in a regular polygon; the limiting part is internally provided with an opening and closing core matched with the limiting part; the outer wall of the opening and closing core is provided with a plurality of limiting surfaces which are attached to the inner wall of the limiting part; the center of the upper end surface of the opening and closing core is provided with a lifting screw hole; a valve rod matched with the lifting screw hole is screwed in the lifting screw hole; the upper end of the valve rod upwards passes through the valve rod hole and is provided with a hand wheel; and the valve rod is provided with a clamping structure matched with the upper surface of the lifting seat.

The outer wall of the opening and closing head is provided with a sealing conical surface with a wide upper part and a narrow lower part; the diameter of the upper end of the sealing conical surface is larger than the inner diameter of the sealing ring, and the diameter of the lower end of the sealing conical surface is smaller than the inner diameter of the sealing ring.

The clamping structure comprises a clamping groove arranged on the valve rod, the position of the clamping groove corresponds to the position of the upper surface of the lifting seat, and the clamping groove is annular; c-shaped clamp springs matched with the clamping grooves are arranged in the clamping grooves, and the outer edges of the C-shaped clamp springs protrude out of the clamping grooves and are attached to the upper surfaces of the lifting seats; the inner wall of the hole at the upper end of the valve rod hole is provided with an annular clamping step; the valve rod is provided with a sealing part matched with the clamping step outside the part of the valve rod in the valve rod hole.

The outer wall of the sealing part is provided with a plurality of annular grooves which are longitudinally and uniformly distributed; an O-shaped ring matched with the annular groove is arranged in the annular groove; the outer wall of the lifting seat is provided with a positioning part which is attached to the upper surface of the valve rod seat; the outer wall of the lifting seat is provided with an outer annular step right below the positioning part; an inner annular step opposite to the outer annular step is arranged on the inner wall of the hole at the upper end of the fixed screw hole; the inner annular step, the outer annular step and the positioning part are enclosed to form a sealed cavity; and a rubber ring matched with the sealing cavity is arranged in the sealing cavity.

The filter structure comprises a filter joint arranged on the lower surface of the valve body, the lower end of the filter joint is inclined towards the right side, and the filter joint is communicated with the opening and closing hole through an inclined hole; a clamping ring extends from the hole at the lower end of the inclined hole towards the lower right; a sealing cover coaxial with the filter joint is screwed in the port at the lower end of the filter joint; the inner wall of the upper end cover opening of the sealing cover is provided with an annular positioning step; a filter screen cylinder is arranged between the inner wall of the upper side of the filter joint and the positioning step, and a clamping ring is embedded in the upper end of the filter screen cylinder; the outer wall of the filter screen cylinder is provided with a plurality of filter holes communicated with the inner space of the filter screen cylinder; the upper part of the filter joint is communicated with the water outlet joint through a water through hole, and the water through hole is shielded by the filter screen cylinder.

The outer wall of the sealing cover is provided with a limiting plate attached to the lower end face of the filter joint; the outer wall of the sealing cover is provided with an outer auxiliary step positioned above the limiting plate; an inner auxiliary step opposite to the outer auxiliary step is arranged on the inner wall of the port at the lower end of the filter joint, and the inner auxiliary step and the outer auxiliary step are annular; the inner auxiliary step, the outer auxiliary step and the limiting plate are enclosed to form an auxiliary chamber; an auxiliary gasket matched with the auxiliary chamber is arranged in the auxiliary chamber, and the auxiliary gasket is made of rubber.

The beneficial effects of the utility model are as follows:

compared with the prior art, the stop type filter valve adopting the structure can realize the filtering effect through the filtering structure, and can realize the opening and closing of the filter valve through the vertical up-and-down movement of the opening and closing head, so that the problem that friction is required to be carried out between the inner wall of the valve body and the outer wall of the valve ball when the valve ball rotates is effectively solved, meanwhile, the situation that impurities in water flow enter the space between the outer wall of the valve ball and the inner wall of the valve body to cause abrasion is effectively avoided, the sealing ring for sealing is directly embedded on the sealing step of the orifice at the upper end of the opening and closing hole, friction can not be carried out on the sealing ring in the up-and-down movement process of the opening and closing head, excessive pressure can not be applied to the sealing ring, the unnecessary damage to the sealing ring can not be caused when the opening and closing head plugs the inner hole of the sealing ring is ensured, the service life of the sealing ring is ensured to the greatest extent, the sealing effect of the sealing ring is ensured, and the situation that water leakage is caused by poor sealing when the opening and closing head plugs the sealing ring is avoided.

Drawings

FIG. 1 is a schematic view of the structure of a shut-off filter valve of the present utility model;

FIG. 2 is a schematic view of the structure of the opening and closing structure;

FIG. 3 is a schematic view of a filter structure;

FIG. 4 is a perspective view of the start-stop core;

fig. 5 is a perspective view of the stop-type filter valve of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the attached drawings and detailed description:

referring to fig. 1 to 5, the present utility model provides a stop-type filter valve, which comprises a valve body 1, a water inlet connector 2 arranged on the left side of the valve body 1, and a water outlet connector 3 arranged on the right side of the valve body 1, wherein an opening and closing seat 4 is arranged on the inner wall of the lower side of the valve body 1; the center of the upper surface of the opening and closing seat 4 is provided with an opening and closing hole 5; a sealing step 6 is arranged at the hole opening at the upper end of the opening and closing hole 5; the sealing step 6 is provided with a sealing ring 7 matched with the sealing step, and the sealing ring 7 is made of PTFE material; the upper surface of the valve body 1 is provided with a valve rod seat 8 corresponding to the opening and closing seat 4 in position; the center of the upper surface of the valve rod seat 8 is provided with a fixed screw hole 9 communicated with the inner space of the valve body 1; a lifting seat 10 matched with the fixed screw hole 9 is screwed in the fixed screw hole; the lifting seat 10 is provided with an opening and closing structure matched with the lifting seat; the opening and closing structure comprises an opening and closing core 11; the lower end of the opening and closing core 11 is provided with an opening and closing head 12, and the opening and closing head 12 can plug and seal the inner hole of the sealing ring 7; a water stop plate 13 positioned on the right side of the opening and closing core 11 is arranged between the outer edge of the upper surface of the opening and closing seat 4 and the inner wall of the valve body 1; the lower surface of the valve body 1 is provided with a filtering structure, and the opening hole 5 is communicated with the water outlet joint 3 through the filtering structure.

The opening and closing structure also comprises a valve rod hole 14 arranged in the center of the upper surface of the lifting seat 10; the lower surface of the lifting seat 10 is provided with a moving hole 15 communicated with the valve rod hole 14, and the diameter of the moving hole 15 is larger than that of the valve rod hole 14; the inner wall of the hole at the lower end of the moving hole 15 is provided with an annular limiting part 16, and the inner wall of the limiting part 16 is in a regular polygon; the limiting part 16 is internally provided with an opening and closing core 11 matched with the limiting part; the outer wall of the opening and closing core 11 is provided with a plurality of limiting surfaces 17 which are attached to the inner wall of the limiting part 16; the center of the upper end surface of the opening and closing core 11 is provided with a lifting screw hole 18; a valve rod 19 matched with the lifting screw hole 18 is screwed in the lifting screw hole; the upper end of the valve rod 19 passes through the valve rod hole 14 upwards and is provided with a hand wheel 20; the valve rod 19 is provided with a clamping structure matched with the upper surface of the lifting seat 10.

The outer wall of the opening and closing head 12 is provided with a sealing conical surface 21 with a wide upper part and a narrow lower part; the diameter of the upper end of the sealing conical surface 21 is larger than the inner diameter of the sealing ring 7, and the diameter of the lower end of the sealing conical surface 21 is smaller than the inner diameter of the sealing ring 7.

The clamping structure comprises a clamping groove 22 arranged on the valve rod 19, the position of the clamping groove 22 corresponds to the position of the upper surface of the lifting seat 10, and the clamping groove 22 is annular; the clamping groove 22 is internally provided with a C-shaped clamping spring 23 matched with the clamping groove, and the outer edge of the C-shaped clamping spring 23 protrudes out of the clamping groove 22 and is attached to the upper surface of the lifting seat 10; the inner wall of the hole at the upper end of the valve rod hole 14 is provided with an annular clamping step 24; the valve rod 19 is provided with a sealing part 25 matched with the clamping step 24 outside the part in the valve rod hole 14.

The outer wall of the sealing part 25 is provided with a plurality of annular grooves 26 which are longitudinally and uniformly distributed; an O-shaped ring 27 matched with the annular groove 26 is arranged in the annular groove; the outer wall of the lifting seat 10 is provided with a positioning part 28 which is attached to the upper surface of the valve rod seat 8; the outer wall of the lifting seat 10 is provided with an outer annular step 29 positioned right below the positioning part 28; an inner annular step 30 opposite to the outer annular step 29 is arranged on the inner wall of the hole at the upper end of the fixed screw hole 9; the inner annular step 30, the outer annular step 29 and the positioning part 28 are enclosed to form a sealed cavity; and a rubber ring 31 matched with the sealing cavity is arranged in the sealing cavity.

The filter structure comprises a filter joint 32 arranged on the lower surface of the valve body 1, the lower end of the filter joint 32 is inclined towards the right, and the filter joint 32 is communicated with the opening and closing hole 5 through an inclined hole 33; a clamping ring 34 extends from the hole at the lower end of the inclined hole 33 towards the lower right; a sealing cover 35 coaxial with the filter joint 32 is screwed in the port at the lower end of the filter joint; the inner wall of the upper end cover opening of the sealing cover 35 is provided with an annular positioning step 36; a filter screen cylinder 37 is arranged between the inner wall of the upper side of the filter joint 32 and the positioning step 36, and the clamping ring 34 is embedded in the upper end of the filter screen cylinder 37; the outer wall of the filter screen cylinder 37 is provided with a plurality of filter holes 38 communicated with the inner space of the filter screen cylinder; the upper part of the filter joint 32 is communicated with the water outlet joint 3 through a water through hole 39, and the water through hole 39 is shielded by the filter screen cylinder 37.

The outer wall of the sealing cover 35 is provided with a limiting plate 40 which is attached to the lower end surface of the filter joint 32; the outer wall of the sealing cover 35 is provided with an outer auxiliary step 41 positioned above the limiting plate 40; an inner auxiliary step 42 opposite to the outer auxiliary step 41 is arranged on the inner wall of the port at the lower end of the filter joint 32, and the inner auxiliary step 42 and the outer auxiliary step 41 are annular; the inner auxiliary step 42, the outer auxiliary step 41 and the limiting plate 40 are enclosed to form an auxiliary chamber; an auxiliary gasket 43 matched with the auxiliary chamber is arranged in the auxiliary chamber, and the auxiliary gasket 43 is made of rubber.

The application method of the utility model is as follows:

the water inlet joint 2 can be used for being connected with a water inlet pipeline, the water outlet joint 3 can be used for being connected with a water outlet pipeline, when the filter valve is in an open state, the inner hole of the sealing ring 7 is not blocked and sealed by the opening and closing head 12 of the opening and closing core 11, at the moment, water in the water inlet pipeline can flow into the valve body 1 through the water inlet pipeline, under the blocking of the water stop plate 13, water entering the valve body 1 can only flow into the opening and closing hole 5 through the inner hole of the sealing ring 7, then flows into the filter screen cylinder 37 through the inclined hole 33 and the clamping ring 34 in sequence, and as the water continuously flows into the filter screen cylinder 37, finally, the water in the filter screen cylinder 37 flows out of the filter screen cylinder 37 through the filter hole 38, the water flowing out of the filter hole 38 flows into the water outlet joint 3 through the water through hole 39, and the water flow 38 can utilize the aperture of the filter hole 38 to keep impurities in the water flow into the filter screen cylinder 37, so that the water flow into the water outlet pipe 3 is finally, and the water outlet pipe connected with the water outlet joint 3 is used for supplying water.

When the filter valve needs to be closed, the hand wheel 20 can be rotated, so that the rotation of the valve rod 19 is realized, because the valve rod 19 is in threaded connection with the lifting screw hole 18 of the opening and closing core 11, and the outer wall of the opening and closing core 11 is provided with a plurality of limiting surfaces 17 which are attached to the regular polygon inner wall of the limiting part 16, when the valve rod 19 drives the opening and closing core 11 to rotate, the opening and closing core 11 converts the rotating force into the force of up-down movement, so that the downward movement of the opening and closing core 11 is realized, when the opening and closing core 11 moves down, the opening and closing head 12 moves down along with the downward movement, the diameter of the lower end of the sealing conical surface 21 of the opening and closing head 12 is smaller than the inner diameter of the sealing ring 7, the diameter of the upper end of the sealing conical surface 21 is larger than the inner diameter of the sealing ring 7, when the opening and closing head 12 moves down to a certain stroke, the edge of the upper end hole of the sealing ring 7 is attached to the sealing conical surface 21 at last, so that the upper end hole opening of the sealing ring 7 is blocked and sealed, when the filter valve needs to be opened, the hand wheel 20 is only required to be reversely rotated, the opening and closing core 11 drives the opening and closing head 12 to move upwards, and as the sealing between the sealing ring 7 and the sealing conical surface 21 is the sealing between the line and the surface, the orifice at the upper end of the inner hole of the sealing ring 7 can be opened at the first time when the opening and closing head 12 moves upwards, the water flow in the valve body 1 can enter the opening and closing hole 5 through the inner hole of the sealing ring 7 at the first time, therefore, the opening and closing of the filter valve is realized through the vertical up and down movement of the opening and closing head, the force exerted on the sealing conical surface 21 of the opening and closing head 12 on the sealing ring 7 is extrusion force rather than friction force, so that the situation that the friction force between the opening and closing head 12 and the sealing ring 7 is seriously worn by the impurities in the water flow is not aggravated, the opening and closing head 12 and the sealing ring 7 are effectively protected, the opening and closing head 12 is directly positioned in the valve body 1, the sealing conical surface 21 of the outer wall of the opening and closing head 12 is contacted with the sealing ring 7 except when the inner hole of the sealing ring 7 is blocked, and is not contacted with other parts under other conditions, so that even if impurities are contacted with the sealing conical surface 21 along with water flow, the sealing conical surface 21 cannot be damaged, the service life and the service performance of the sealing conical surface 21 are effectively ensured, the sealing performance of the sealing conical surface 21 when the inner hole of the sealing ring 7 is blocked is ensured, the sealing ring 7 is made of PTFE, the sealing ring is high in wear resistance and corrosion resistance, the sealing effect of the sealing ring 7 can be effectively improved, and the sealing performance of the sealing conical surface 21 when the inner hole of the sealing ring 7 is blocked is further improved.

In summary, the utility model can realize the filtering effect through the filtering structure, and can realize the opening and closing of the filtering valve through the vertical up-and-down movement of the opening and closing head 12, thereby effectively solving the problem that the inner wall of the valve body needs to be rubbed when the valve ball rotates, simultaneously effectively avoiding the situation that impurities in water flow enter the space between the outer wall of the valve ball and the inner wall of the valve body 1 to cause abrasion, and the sealing ring 7 for sealing is directly embedded on the sealing step 6 at the orifice of the upper end of the opening and closing hole 5, and in the up-and-down movement process of the opening and closing head 12, the sealing ring 7 cannot be rubbed, and further, redundant pressure cannot be applied to the sealing ring 7, so that the service life of the sealing ring 7 is ensured to the greatest extent, thereby ensuring the sealing effect of the sealing ring 7, and avoiding the situation that water leakage is caused by poor sealing when the opening and closing head 12 plugs the sealing ring 7.

The clamping structure comprises a clamping groove 22 arranged on a valve rod 19, the position of the clamping groove 22 corresponds to the position of the upper surface of the lifting seat 10, the clamping groove 22 is annular, a C-shaped clamp spring 23 matched with the clamping groove is arranged in the clamping groove 22, the outer edge of the C-shaped clamp spring 23 protrudes out of the clamping groove 22 and is attached to the upper surface of the lifting seat 10, an annular clamping step 24 is arranged on the inner wall of the upper end hole of the valve rod hole 14, a sealing part 25 matched with the clamping step 24 is arranged outside the part of the valve rod 19 in the valve rod hole 14, the downward movement of the valve rod 19 can be effectively limited by the existence of the C-shaped clamp spring 23, the upward movement of the valve rod 19 can be effectively limited by the existence of the clamping step 24, so that the valve rod 19 can be guaranteed to stably rotate at the same height, the C-shaped clamp spring 23 is extremely easy to detach, and the valve rod 19 is convenient to disassemble and assemble.

The sealing part 25 outer wall is equipped with a plurality of annular grooves 26 that are vertical evenly distributed, be equipped with rather than assorted O type circle 27 in the annular groove 26, lifting seat 10 outer wall is equipped with one and is equipped with the location portion 28 that laminates with valve rod seat 8 upper surface mutually, lifting seat 10 outer wall is equipped with one and is located the outer annular step 29 under the location portion 28, fixed screw 9 upper end hole inner wall is equipped with one and is equipped with the inner annular step 30 that is opposite with outer annular step 29, enclose between inner annular step 30, enclose between outer annular step 29 and the location portion 28 and form a sealed cavity, be equipped with rather than assorted rubber circle 31 in the sealed cavity, the leakproofness between sealing part 25 outer wall and the valve rod hole 14 inner wall can effectively be guaranteed to O type circle 27's existence, the leakproofness between lifting seat 10 and the fixed screw 9 can effectively be guaranteed to further avoid the filter valve to take place the condition of leaking water.

The filter structure comprises a filter joint 32 arranged on the lower surface of a valve body 1, the lower end of the filter joint 32 is inclined towards the right, the filter joint 32 is communicated with an opening and closing hole 5 through an inclined hole 33, a clamping ring 34 extends towards the lower right from a hole opening at the lower end of the inclined hole 33, a sealing cover 35 coaxial with the filter joint 32 is screwed into a port at the lower end of the filter joint 32, an annular positioning step 36 is arranged on the inner wall of an upper end cover opening of the sealing cover 35, a filter screen cylinder 37 is arranged between the inner wall at the upper side of the filter joint 32 and the positioning step, the clamping ring 34 is embedded into the upper end of the filter screen cylinder 37, the upper part of the filter joint 32 is communicated with a water outlet joint 3 through a water through hole 39, the filter screen cylinder 37 shields the water through hole 39, in the actual filtering process of the filter screen cylinder 37, except for a part of impurities which are directly cut into the filter screen cylinder 37, the other part of impurities can be adhered into the filter screen cylinder 37, the impurities in the filter screen cylinder 37 are continuously piled up along with the time, the flow of the filter screen cylinder 37 is finally influenced, and the filter screen cylinder 37 is required to be cleaned, and the filter cylinder 37 is required to be cleaned, and the efficiency of the filter cylinder 37 is required to be cleaned, and the filter cylinder 37 is cleaned easily from the port at the lower end of the port of the lower end of the filter end.

The sealing cover 35 outer wall is equipped with a limiting plate 40 that laminates with filtering joint 32 lower extreme face mutually, sealing cover 35 outer wall is equipped with an outer auxiliary step 41 that is located limiting plate 40 top, filtering joint 32 lower extreme port inner wall is equipped with an interior auxiliary step 42 that is relative with outer auxiliary step 41, interior auxiliary step 42 and outer auxiliary step 41 all are annular, interior auxiliary step 42, outer auxiliary step 41 and limiting plate 40 enclose and close and form an auxiliary chamber, be equipped with rather than assorted auxiliary washer 43 in the auxiliary chamber, auxiliary washer 43 is the rubber material, auxiliary washer 43's existence can effectively guarantee sealing nature between sealing cover 35 and the filtering joint 32 lower extreme port, avoid sewage to leak to external condition through the clearance between sealing cover 35 and the filtering joint 32 lower extreme port.

Claims (7)

1. The utility model provides a stop-type filter valve, includes the valve body, locates the left water inlet joint of valve body and locates the water outlet joint on valve body right side, its characterized in that: an opening and closing seat is arranged on the inner wall of the lower side of the valve body; the center of the upper surface of the opening and closing seat is provided with an opening and closing hole; the hole at the upper end of the opening hole is provided with a sealing step; the sealing step is provided with a sealing ring matched with the sealing step, and the sealing ring is made of PTFE (polytetrafluoroethylene) material; the upper surface of the valve body is provided with a valve rod seat corresponding to the opening and closing seat; the center of the upper surface of the valve rod seat is provided with a fixed screw hole communicated with the inner space of the valve body; the fixed screw hole is internally and spirally connected with a lifting seat matched with the fixed screw hole; the lifting seat is provided with an opening and closing structure matched with the lifting seat; the opening and closing structure comprises an opening and closing core; the lower end of the opening and closing core is provided with an opening and closing head which can plug and seal the inner hole of the sealing ring; a water stop plate positioned on the right side of the opening and closing core is arranged between the outer edge of the upper surface of the opening and closing seat and the inner wall of the valve body; the lower surface of the valve body is provided with a filtering structure, and the opening and closing hole is communicated with the water outlet joint through the filtering structure.

2. A stop filter valve according to claim 1, wherein: the opening and closing structure also comprises a valve rod hole arranged in the center of the upper surface of the lifting seat; the lower surface of the lifting seat is provided with a moving hole communicated with the valve rod hole, and the diameter of the moving hole is larger than that of the valve rod hole; the inner wall of the hole at the lower end of the moving hole is provided with an annular limiting part, and the inner wall of the limiting part is in a regular polygon; the limiting part is internally provided with an opening and closing core matched with the limiting part; the outer wall of the opening and closing core is provided with a plurality of limiting surfaces which are attached to the inner wall of the limiting part; the center of the upper end surface of the opening and closing core is provided with a lifting screw hole; a valve rod matched with the lifting screw hole is screwed in the lifting screw hole; the upper end of the valve rod upwards passes through the valve rod hole and is provided with a hand wheel; and the valve rod is provided with a clamping structure matched with the upper surface of the lifting seat.

3. A stop filter valve according to claim 2, wherein: the outer wall of the opening and closing head is provided with a sealing conical surface with a wide upper part and a narrow lower part; the diameter of the upper end of the sealing conical surface is larger than the inner diameter of the sealing ring, and the diameter of the lower end of the sealing conical surface is smaller than the inner diameter of the sealing ring.

4. A stop filter valve according to claim 2, wherein: the clamping structure comprises a clamping groove arranged on the valve rod, the position of the clamping groove corresponds to the position of the upper surface of the lifting seat, and the clamping groove is annular; c-shaped clamp springs matched with the clamping grooves are arranged in the clamping grooves, and the outer edges of the C-shaped clamp springs protrude out of the clamping grooves and are attached to the upper surfaces of the lifting seats; the inner wall of the hole at the upper end of the valve rod hole is provided with an annular clamping step; the valve rod is provided with a sealing part matched with the clamping step outside the part of the valve rod in the valve rod hole.

5. A shut-off filter valve as defined in claim 4, wherein: the outer wall of the sealing part is provided with a plurality of annular grooves which are longitudinally and uniformly distributed; an O-shaped ring matched with the annular groove is arranged in the annular groove; the outer wall of the lifting seat is provided with a positioning part which is attached to the upper surface of the valve rod seat; the outer wall of the lifting seat is provided with an outer annular step right below the positioning part; an inner annular step opposite to the outer annular step is arranged on the inner wall of the hole at the upper end of the fixed screw hole; the inner annular step, the outer annular step and the positioning part are enclosed to form a sealed cavity; and a rubber ring matched with the sealing cavity is arranged in the sealing cavity.

6. A stop filter valve according to claim 1, wherein: the filter structure comprises a filter joint arranged on the lower surface of the valve body, the lower end of the filter joint is inclined towards the right side, and the filter joint is communicated with the opening and closing hole through an inclined hole; a clamping ring extends from the hole at the lower end of the inclined hole towards the lower right; a sealing cover coaxial with the filter joint is screwed in the port at the lower end of the filter joint; the inner wall of the upper end cover opening of the sealing cover is provided with an annular positioning step; a filter screen cylinder is arranged between the inner wall of the upper side of the filter joint and the positioning step, and a clamping ring is embedded in the upper end of the filter screen cylinder; the outer wall of the filter screen cylinder is provided with a plurality of filter holes communicated with the inner space of the filter screen cylinder; the upper part of the filter joint is communicated with the water outlet joint through a water through hole, and the water through hole is shielded by the filter screen cylinder.

7. A stop filter valve according to claim 6, wherein: the outer wall of the sealing cover is provided with a limiting plate attached to the lower end face of the filter joint; the outer wall of the sealing cover is provided with an outer auxiliary step positioned above the limiting plate; an inner auxiliary step opposite to the outer auxiliary step is arranged on the inner wall of the port at the lower end of the filter joint, and the inner auxiliary step and the outer auxiliary step are annular; the inner auxiliary step, the outer auxiliary step and the limiting plate are enclosed to form an auxiliary chamber; an auxiliary gasket matched with the auxiliary chamber is arranged in the auxiliary chamber, and the auxiliary gasket is made of rubber.