CN100580287C - Magnetic anti-drip valve - Google Patents

Abstract

The invention relates to an improved structure of magnetic-type drip-proof valves, which belong to the technical field of pump valves. A valve seat is fixed on a valve body between a water inlet and a water outlet. A fixed valve core, a floating valve core and a valve rod are fixed inside the valve seat. One end of the floating valve core is inserted into the fixed valve core, and the other end thereof has a permanent magnet and a magnetic attraction body on the end surface opposite to the fixed valve core. A slant partition is arranged between the water inlet and the water outlet. A through-hole is arranged on the slant partition in a position close to the water inlet and opposite to the inlet of a flow path of the valve core. At least one outlet of the flow path is communicated with the water outlet in the direction along the slant partition. Compared with prior art, the resistance of the whole flow path is significantly reduced, that is, the floating valve core is kept in opened state with the aid of water pressure under such condition that the water flow is small. Therefore, the invention can efficiently prevent the leakage of water drips and ensure the users to regulate the water flow according to the actual needs.

Description

Magnetic anti-drip valve

technical field

The invention relates to a valve installed in a fluid pipeline, in particular to a structural improvement of a magnetic suction anti-drip valve, which belongs to the technical field of pump valves.

Background technique

At present, the inability of tap water meters to reflect and record dripping water is a headache for water management departments such as water companies. It is understood that the annual loss due to dripping is considerable. What's more serious is that, due to failing to be effectively curbed, the situation of maliciously stealing water by drip means has a tendency to expand.

In order to solve the problem that the original tap water meter cannot reflect and record dripping water, the Chinese patent application with the application number 200620068877.5, the application date being 2006.01.26, the publication number being CN2869468 and the name "Lockable Anti-Drip Valve" discloses a valve, The valve includes a valve body with a water inlet and a water outlet, a valve seat is installed on the channel between the water inlet and the water outlet, and a piston assembly that can slide to control the on-off of the channel is installed in the valve seat. A permanent magnet is fixed on one of the combined end faces, and a magnetically attractable material is fixed on the other. In this way, when dripping water is stolen, the pressure of the water flow is not enough to overcome the magnetic attraction force to push back the piston, and the valve is closed to block the water flow, thereby avoiding the dripping water that cannot be reflected by the water meter.

However, the above-mentioned valve has the problem of being difficult to form a small water flow during use, especially for users on high floors, thus hindering water conservation to a certain extent.

Contents of the invention

The object of the present invention is to propose a magnetic suction anti-drip valve that can not only effectively prevent dripping and stealing water, but also adjust the water flow according to the actual needs.

The applicant carefully studied the structure of the above-mentioned existing valve and found that the water flow from the water inlet to the water outlet passes through several twists and turns, and there are theoretical right-angle twists and turns, so the resistance of the flow path is large and shock waves are likely to be generated. When the water flow is small, due to the small water pressure, it is easy to produce a significant pressure drop due to the large resistance of the flow channel, so that the gap between the valve seat and the piston assembly becomes smaller rapidly. Under the action of magnetic attraction, the flow channel is quickly closed. The spool is closed so that a small flow cannot be established.

According to the above research results, in order to achieve the above purpose, the applicant proposes the technical solution of the magnetic suction anti-drip valve of the present invention: it includes a valve body with a water inlet and a water outlet, and the valve body between the water inlet and the water outlet The valve seat is fixed; the joint between the valve seat and the valve body is equipped with a fixed valve core and a floating valve core, and the end of the valve seat far away from the valve body is equipped with a valve stem assembly; the fixed valve core is made with a connection between the water inlet and The flow channel of the water outlet; one end of the floating spool is inserted into the fixed spool, which has a closed position for blocking the flow channel and an open position for opening the flow channel; the lifting screw pair of the valve stem assembly has The floating spool is constrained in the first position of the closed position and the second position of releasing the constraint on the floating spool; the other end of the floating spool and the opposite end surface of the fixed spool have permanent magnets and magnetic attractors respectively; its improvement The location is: there is an inclined partition on the valve body between the water inlet and the water outlet, and a through hole is opened on the inclined partition adjacent to the water inlet, and the through hole is facing the inlet of the fixed valve core flow channel, so At least one of the outlets of the flow channel communicates with the water outlet along the direction of the inclined partition wall.

In this way, when tap water enters the valve body from the water inlet and then flows out from the water outlet, the direction of the water flow only undergoes a small twist and turn at the fixed valve core, so compared with the prior art, the resistance of the entire flow path is significantly reduced , even when the water flow is small, the floating spool can be kept open by means of water pressure, so that the user can adjust the water flow according to the actual needs on the premise of effectively preventing water leakage and stealing.

The further improvement of the present invention is that the end face of the fixed valve core opposite to the floating valve core is fixed with a spacer, the spacer is formed with a magnetic penetration hole, and the end surface of the fixed valve core opposite to the floating valve core is formed with a penetrating hole. The protruding part of the magnetic hole. In this way, it is further ensured that only when the fixed spool is close to the opposite end face of the floating spool, can the valve be closed effectively, that is, the valve is closed only when the situation of dripping and stealing water occurs, and the resistance to small water flow is more effectively avoided. lag.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic diagram of the structure of the partially opened floating valve core 5 of the embodiment in FIG. 1 .

FIG. 3 is a schematic structural diagram of the partially closed state of the floating valve core 5 of the embodiment in FIG. 1 .

FIG. 4 is a perspective view of the lower part of the floating valve core 5 of the embodiment in FIG. 1 .

FIG. 5 is a cutaway perspective view of the fixed valve core 7 of the embodiment in FIG. 1 .

FIG. 6 is an upper perspective view of the floating valve core 5 of the embodiment in FIG. 1 .

Detailed ways

Embodiment one

The basic structure of the magnetic suction anti-drip valve of this embodiment is shown in Figure 1. The main body of the valve body 1 is in the shape of a tube, the left side is the water inlet, and the right side is the water outlet coaxial with the water inlet. An inclined partition 17 is formed in the flow passage between the inlet and the water outlet, and a through hole 18 is formed on the inclined partition adjacent to the water inlet. The valve body 1 between the water inlet and the water outlet is shaped on a threaded mouth that is about 60° with the center line of the water inlet and the water outlet, wherein the valve seat 8 is screwed and fixed. The valve seat 8 is a two-section conjoined round pipe structure with a thin top and a thick bottom, and a fixed valve core 7 and a floating valve core 5 are installed at the junction with the valve body 1. The end of the valve seat 8 away from the valve body 1 is equipped with a rotatable The valve stem 10 is sealed by an O-ring 11 between the two. After removing the plug 13 located at the upper end of the valve stem 10, the internal teeth at the lower end of the key 14 can be meshed with the upper outer teeth of the valve stem 10, and the valve stem 10 can be screwed with the help of the key 14. The valve clack 9 that is connected with each other constitutes a valve stem assembly, and the valve stem 10 can be rotated to drive the valve clack 9 up and down to realize opening or closing of the valve.

The specific structure of the fixed spool 7 is shown in Figure 5. The overall structure is barrel-shaped, and the lower end is an inlet. After fixing, the inlet is facing the through hole 18 on the inclined next wall, and the barrel wall of the fixed spool 7 has a radial outlet. , after being fixed, one of the outlets communicates with the water outlet along the direction of the inclined partition, thereby forming a flow channel connecting the water inlet and the water outlet.

The specific structure of the floating spool 5 is shown in Figure 6. The lower end is fixedly connected with the small piston 5-1 after being inserted in the center hole at the upper end of the fixed spool 7, and the extended end surface formed at the upper end has permanent magnetism. The end of the small piston 5-1 away from the through hole 18 has an annular groove, as shown in FIG. 4 . A fixed magnetic iron ring 19 is embedded in the groove on the opposite end surface of the fixed spool 7 .

When normal water supply is required, the valve disc 9 in the valve stem assembly is placed in the upper position with the help of the key 14, and the water pressure causes the floating valve core 5 to rise, and is in the position shown in Figure 2 relative to the fixed valve core 7, so the flow channel is opened and the water flow Only through the fixed valve core 7, the small twists and turns between the inlet and outlet can pass through the valve body 1 smoothly, and the pressure loss is very small, so the regulation of small water flow can be realized. When dripping and stealing water occurs, the floating spool 5 is attracted to the opposite end surface of the fixed spool 7, and is in the position shown in Figure 3, and the flow channel will be closed by the combination of the small piston 5-1 and the sealing ring. Thereafter, if the user continues to maintain the state of dripping and stealing water, as the amount of water in the pipeline between the magnetic suction anti-drip valve and the faucet decreases, the water pressure before and after the valve will gradually reach the pressure that overcomes the magnetic force, so the floating valve will The core 5 is pushed open instantly, and with the instantaneous surge of water flow, the pointer of the water meter will be driven to rotate to achieve the required metering, so the phenomenon of water theft can be completely eliminated. When it is necessary to overhaul or close the valve, when the valve clack 9 is lowered to the lowest position by the key 14, the floating spool 5 will be pressed, so that it and the fixed spool 7 are always in the state of Figure 3, so that the water flow channel can be completely closed .

In addition, the spacer 20 is fixed on the iron ring 19, and the spacer 20 is formed with a magnetic hole, and the outer surface of the iron ring 19 has a protruding part that penetrates the magnetic hole, which helps to ensure that only when the fixed valve core 7 and the floating When the opposite end faces of the spool 5 are close to each other, the valve can be closed by mutual suction. Experiments have proved that the valve of this embodiment can fully realize the regulation of small water flow, and can maintain stable performance even after long-term use, so it is convenient for popularization and application.

Claims (5)

1. A magnetic suction type anti-drip valve, comprising a valve body that is shaped on a water inlet and a water outlet, a valve seat is fixed on the valve body between the water inlet and the water outlet; the joint between the valve seat and the valve body It is equipped with a fixed valve core and a floating valve core, and the end of the valve seat away from the valve body is equipped with a valve stem assembly; the fixed valve core is made with a flow channel connecting the water inlet and the water outlet; In the fixed spool, there is a closed position that blocks the flow path and an open position that opens the flow path; the lifting screw pair of the valve stem assembly has a first position that constrains the floating spool in the closed position and a release position. The second position constrained by the floating spool; the other end of the floating spool and the opposite end surface of the fixed spool have permanent magnets and magnetic attractors respectively; it is characterized in that: on the valve body between the water inlet and the water outlet It has an inclined partition, and the inclined partition has a through hole adjacent to the water inlet, and the through hole is facing the inlet of the fixed valve core flow channel, and at least one of the outlets of the flow channel communicates with the water outlet along the direction of the inclined partition The end face of the fixed spool opposite to the floating spool is fixed with an isolation pad, the isolation pad is formed with a magnetic penetration hole, and the end surface of the fixed spool opposite to the floating spool is formed with a protruding part extending into the magnetic penetration hole. 2. The magnetic suction anti-drip valve according to claim 1, characterized in that: the valve seat is a two-section conjoined round tube structure with a thin top and a thick bottom, and the end far away from the valve body is equipped with a rotatable valve stem. , the lower end of the valve stem is equipped with a liftable valve disc connected by a screw pair to form the valve stem assembly. 3. The magnetic suction anti-drip valve according to claim 2, characterized in that: the lower end of the floating spool is inserted into the central hole at the upper end of the fixed spool and then fixedly connected with the small piston, and the upper end forms a permanent magnetic expansion end face; A groove is formed on the opposite end surface of the fixed valve core, and a fixed iron ring is embedded in the groove. 4 . The magnetic suction anti-drip valve according to claim 3 , wherein an annular groove is formed at the end of the small piston away from the through hole. 5. The magnetic suction anti-drip valve according to claim 4, characterized in that: the upper end of the valve stem is formed with outer teeth that can mesh with the inner teeth at the lower end of the key.

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