CN220792179U - Waterproof hammer bottom valve - Google Patents

Abstract

The utility model provides a waterproof hammer bottom valve that can play guard action to water pump, water absorption pipeline and bottom valve, includes valve body, disk seat, uide bushing, goes up guide bar and main valve lamella, sets up the discharge orifice on main valve lamella surface, sets up the lower guide bar with last guide bar and main valve lamella synchronous action below the main valve lamella, suit discharge valve lamella on lower guide bar, the discharge valve lamella is located the overflow mouth of disk seat, sets up the spring below being located the discharge valve lamella on lower guide bar, the upper surface of discharge valve lamella is sealed face, makes the sealed face top of discharge valve lamella lean on of valve lamella under the sealed face will the discharge orifice is sealed through the spring. When the bottom valve flows, the upper guide rod, the main valve clack, the lower guide rod and the leakage valve clack move upwards under the action of water flow, and the water flow passes through the bottom valve; when the bottom valve is shut off, the main valve clack rod and the drainage valve clack are closed under the action of gravity, so that water is reserved in the pump cavity and the water suction pipeline on the bottom valve. When the pressure in the upper cavity of the bottom valve exceeds the set value of the opening pressure of the drain valve clack, the drain valve clack is opened, so that the water hammer is eliminated.

Description

Waterproof hammer bottom valve

Technical Field

The utility model relates to the field of check valves, in particular to a waterproof hammer bottom valve.

Background

When the water pump is installed on the suction pipe, a bottom valve is installed at the lower end of the water suction pipe, and the bottom valve is used for ensuring that water exists in the pump and the water suction pipe when the water pump is started. The existing bottom valve comprises a valve body, a valve seat and a guide sleeve fixed in the valve body, a guide rod which is arranged in the guide sleeve and can move up and down, and a valve clack fixedly arranged on the guide rod, wherein a valve clack sealing surface is arranged on a valve seat sealing surface in a sitting manner, so that a sealing effect is achieved. When the water pump absorbs water, the valve clack moves upwards under the action of water pressure, so that the bottom valve is opened to form overcurrent; after the water pump stops rotating, the valve clack automatically falls under the action of gravity and is arranged on the valve seat, so that the bottom valve is closed. If the check valve at the outlet of the water pump fails to work when the water pump is stopped, a water hammer is generated, and high pressure is instantaneously generated in the pump cavity and the water suction pipeline, so that the water valve, the water suction pipeline and the bottom valve are damaged at the part with weaker pressure bearing.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides the waterproof hammer bottom valve which can protect the water pump, the water suction pipeline and the bottom valve.

The technical scheme of the utility model is as follows: the utility model provides a waterproof hammer bottom valve, includes the valve body, the disk seat of being connected with the valve body, sets up the uide bushing in the valve body, installs the last guide bar that can reciprocate in the uide bushing, the main valve lamella of fixed setting on last guide bar, the sealed face seat of main valve lamella is on the sealed face of disk seat, its special character is: the valve is characterized in that a drain hole is formed in the surface of the main valve, a lower guide rod which synchronously acts with the main valve and the upper guide rod is arranged below the main valve, the drain valve is sleeved on the lower guide rod and is positioned in a through hole of the valve seat, a spring is arranged below the drain valve on the lower guide rod, the upper surface of the drain valve is a sealing surface, and the sealing surface of the drain valve is propped against the lower sealing surface of the valve to seal the drain hole through the spring.

Further, the lower guide bar and the upper guide bar are coaxial.

Further, the area of the drain hole is more than or equal to 80% of the nominal diameter of the bottom valve.

Further, the number of the drainage holes is 3-4, and the drainage holes are uniformly distributed in the radial direction by taking the guide rods as the center.

Further, the lower guide rod, the main valve clack and the upper guide rod are of an integrated structure.

Further, the spring is mounted on the lower guide rod through a nut positioned at the lower end of the lower guide rod.

Further, a lower guide sleeve extending downwards is arranged on the leakage valve clack.

Further, the opening pressure of the leakage flow valve clack is set to be 1kg/cm2.

The beneficial effects of the utility model are as follows: when the bottom valve overflows, the upper guide rod, the main valve clack, the lower guide rod and the leakage valve clack form a whole, and move upwards under the action of water flow, so that the water flow passes through; the upper guide rod, the main valve clack, the lower guide rod and the drainage valve clack form a whole when the bottom valve is shut off, and the water is kept in the pump cavity and the water suction pipeline on the bottom valve under the action of gravity. When the pressure in the upper cavity of the bottom valve exceeds the set value of the opening pressure of the leakage valve clack, the leakage valve clack is opened under the action of the upper pressure difference and the lower pressure difference to form leakage flow, so that a water hammer is eliminated, and the damage of the water hammer to the water pump, the water suction pipeline and the weaker pressure bearing part of the bottom valve is prevented.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the main valve flap and upper guide rod of FIG. 1;

fig. 3 is a top view of fig. 2.

In the figure: the valve comprises a valve body-1, a main valve flap-2, a leakage valve flap-3, a valve seat-4, a spring-5, a nut-6, a lower guide rod-7, a guide sleeve-8, an upper guide rod-9, a leakage hole-201, a sealing surface-202, a lower guide sleeve-301, a filter screen-401, a flow through port-402 and a sealing surface-403.

Detailed Description

As shown in the figure, the waterproof hammer bottom valve comprises a valve body 1, a valve seat 4 connected with the valve body 1 through a flange, and a guide sleeve 8 arranged in the valve body 1 and integrated with the valve body 1, wherein the upper part of the valve body 1 is provided with a flange which is used for being connected with a pipeline, and a plurality of filtering holes are formed in the lower part of the valve seat 4 to form a filtering net 401, so that sundries are prevented from entering the pipeline.

An upper guide rod 9 capable of sliding up and down along the guide sleeve is arranged in the guide sleeve 8, a main valve 2 integrated with the upper guide rod 9 is arranged on the upper guide rod 9, the main valve 2 and the upper guide rod 9 are welded into a whole in the example, the bottom surface of the main valve 2 is a sealing surface 202 and is arranged on a sealing surface 403 of the valve seat 4 to play a sealing role. The surface of the main valve 2 is provided with a drain hole 201, the lower guide rod 7 coaxial with the upper guide rod 9 is arranged below the main valve 2, the lower guide rod 7 and the upper guide rod 9 are of an integrated structure, the upper guide rod 9, the main valve 2 and the lower guide rod 7 synchronously act, the drain valve flap 3 is sleeved on the lower guide rod 7, the drain valve flap 3 is positioned in the overflow port 402 of the valve seat 4 and can slide up and down along the lower guide rod, the spring 5 is sleeved below the drain valve flap 3 on the lower guide rod 9, the upper surface of the drain valve flap 3 is a sealing surface, the sealing surface of the drain valve flap 3 is propped against the sealing surface 202 of the bottom surface of the main valve flap 2 through the spring 5, and the drain hole 201 is sealed through the mutual matching of the upper guide rod 9 and the lower guide rod.

When the bottom valve flows, the upper guide rod 9, the main valve clack 2, the lower guide rod 7 and the drain valve clack 3 are integrated, and move upwards under the action of water pressure, so that water flows through. When the bottom valve is shut off, the main valve clack 2 and the leakage valve clack 3 slide downwards to close the sealing surfaces under the action of gravity, so that water is reserved in the upper cavity of the bottom valve. Under the action of the spring 5, the bottom valve is ensured not to leak when the pipeline pressure does not exceed a set value, and the leakage valve clack 3 is opened only when the pipeline pressure exceeds the set value of the opening pressure of the leakage valve clack 3, so that the leakage effect is achieved.

Further, the area of the drain hole 201 is more than or equal to 80% of the nominal diameter of the bottom valve.

Further, the number of the drain holes 201 is 3, and the drain holes are uniformly distributed radially with the guide rods 9 as the center.

Further, the spring 5 is mounted on the lower guide bar 4 by a nut 6 at the lower end of the lower guide bar 4.

Further, a lower guide sleeve 301 extending downwards is arranged on the leakage valve clack 3.

Further, the opening pressure of the relief flap 3 was set at 1kg/cm ² 。

The above is only a specific embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a waterproof hammer bottom valve, includes the valve body, the disk seat of being connected with the valve body, sets up the uide bushing in the valve body, installs the last guide bar that can reciprocate in the uide bushing, and the fixed main valve lamella that sets up on last guide bar, main valve lamella sealed face seat is on the disk seat sealed face, its characterized in that sets up a plurality of drain holes on main valve lamella surface, set up below the main valve lamella with main valve lamella and last guide bar synchronous action's lower guide bar, suit drain valve lamella on lower guide bar, the drain valve lamella is located the overflow mouth of disk seat, is located the spring below the drain valve lamella on lower guide bar, the upper surface of drain valve lamella is sealed face, makes drain sealed face top of drain valve lamella will the drain hole is sealed by the spring is leaned on the valve lamella lower sealed face.

2. The water hammer resistant bottom valve of claim 1 wherein the total area of the drain holes is greater than or equal to 80% of the nominal diameter of the bottom valve.

3. The waterproof hammer bottom valve of claim 1, wherein the lower guide bar and the upper guide bar are coaxial.

4. The waterproof hammer bottom valve according to claim 1 or 2, wherein the number of the drain holes is 3-4 and the drain holes are uniformly distributed radially with the guide rods as the center.

5. A water-resistant hammer bottom valve according to claim 1 or 3, wherein the lower guide bar is integrally formed with the main flap and the upper guide bar.

6. The waterproof hammer bottom valve of claim 1, wherein the spring is mounted on the lower guide bar by a nut located at the lower end of the lower guide bar.

7. The waterproof hammer bottom valve of claim 1, wherein the drain valve flap is provided with a downwardly extending lower guide sleeve.

8. The waterproof hammer bottom valve of claim 1, wherein the vent flap has an opening pressure set point of 1kg/cm ² 。