CN219242780U

CN219242780U - Negative pressure valve

Info

Publication number: CN219242780U
Application number: CN202223063279.7U
Authority: CN
Inventors: 余庆喜; 余岳; 余俊忠; 蔡美福; 沈滨杰; 陈校阳; 李琼河; 张义财; 余惠泉
Original assignee: Guangdong Xingong Electrical Appliances Co ltd
Current assignee: Guangdong Xingong Electrical Appliances Co ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-06-23
Anticipated expiration: 2032-11-18

Abstract

The utility model discloses a negative pressure valve, which is characterized in that a controlled piece moves under the action of a spring to enable a push rod of the controlled piece to act on the linkage piece, the controlled piece seals the inlet, the elastic diaphragm is positioned above the controlled piece and is close to or contacts the controlled piece, the controlled piece can reversely move by overcoming the elastic force of the spring by deformation and contraction of the elastic diaphragm, the push rod is dislocated without acting on the linkage piece any more, and the controlled piece is separated from the inlet in the fixed piece under the action of pressure at the inlet. The negative pressure valve has the characteristics of stable sealing performance, smooth operation and the like.

Description

Negative pressure valve

Technical Field

The utility model belongs to a fluid valve, relates to a mechanism for opening a fluid channel according to negative pressure, is suitable for controlling liquid or gas, and more particularly relates to a negative pressure valve which is formed by controlling a plugging piece through a push rod by using a negative pressure acting elastic membrane to open the channel.

Background

In the past, in the device of making tea, dispose storage water tank and water inlet mechanism, because the storage water tank is placed below, still need adopt the pump to take out water to water inlet mechanism from the storage water tank to in order to send water to the kettle by water inlet mechanism. Typically, the storage tanks are provided with valves for controlling the water supply, both manually and automatically. The automatic opening generally adopts a circuit to control the valve, and meanwhile, the control of the valve and the pump is coordinated by the circuit, so that the requirement on a water inlet mechanism is high, the structure is complex, and the cost is high. Therefore, improvement is made, and the negative pressure generated by the water pump at the water outlet is utilized to open the water inlet channel, so that the structure of the water inlet channel is simpler. Several relevant documents are given below to reflect this.

Chinese patent No. CN 217030142U discloses a negative pressure valve, which uses a water pump to generate negative pressure at the water outlet 22, so that the air pressure diaphragm 5 moves upward and drives the ejector pin 71 to move upward, the ejector pin 71 overcomes the spring 8 to push the valve plug 4, thereby opening the valve port 23, and water can flow from the water inlet 21 to the water outlet 22 through the valve port 23.

The chinese patent application CN 102135193a also discloses a three-way valve, which also generates negative pressure at the water outlet 102, and the pressure sensing diaphragm 114 deforms and drives the control rod 116 to move downward, and the control rod 116 overcomes the water sealing spring 112 to make the sealing head assembly 113 separate from the water sealing port 117, so that the water in the water filtering cavity 108 flows to the water outlet 102 through the water sealing port 117.

In addition, the use of a diaphragm to deform under pressure to open a valve plug can also be used for control of the gas path, as reflected in the literature.

The Chinese patent No. 2407204Y also discloses an automatic temperature regulator of a gas water heater, which uses water to impact the pressure membrane 13 from the water channel inlet 17 through the water inlet 18, so that the pressure membrane 13 pushes the thimble 14, the thimble 14 pushes the valve plug 40 upwards, and the gas at the gas inlet 31 enters the gas channel 32.

In the above-mentioned various schemes, all tie up the valve port by the valve plug straight to adopt thimble or control rod direct action valve plug to let it leave the valve port, in order to realize the intercommunication of passageway, however, this kind of structure has the relatively poor problem of valve plug shutoff valve port its closure, easily causes the not enough that produces the leakage, in addition, in assembly and maintenance, still need consider thimble and valve plug and spring complex problem, so that the thimble removes and can aim at the valve plug and just can guarantee its normal play effect.

Disclosure of Invention

The utility model aims to provide a negative pressure valve which does not need to adopt circuit control and electricity supply or a structure that a thimble pushes a valve plug, but utilizes negative pressure to act on an elastic diaphragm, and the elastic diaphragm laterally controls a plugging piece by a push rod under the action of a control so as to open a fluid channel.

The aim of the utility model is achieved by the following scheme:

the negative pressure valve comprises a shell, wherein an elastic diaphragm, a controlled piece, a spring and a blocking component are arranged in the shell, the shell is provided with an inlet and an outlet, the blocking component is provided with a blocking piece, a linkage piece and a fixing piece, the blocking piece and the linkage piece are fixed together, and the blocking piece and the linkage piece are arranged at the inlet by the fixing piece.

Preferably, in the above scheme, the push rod forms a notch so that the linkage piece enters the notch to be misplaced. When the linkage member enters the notch, the push rod does not act on the linkage member any more or does not substantially push the linkage member.

More preferably, in the above scheme, the push rod is obliquely arranged, the slope contacts with the linkage member, the end part of the slope acts on the linkage member, and the end part moves to form dislocation, so that the action on the linkage member can be released, and the linkage member is in a loose state. The oblique arrangement can enable the matching between the push rod and the linkage piece to be smoother.

When negative pressure exists in the outlet, the elastic membrane deforms and contracts, the controlled piece moves against the elastic force of the spring, the push rod is dislocated and does not act on the linkage piece any more, the blocking piece is separated from the inlet in the fixed piece under the action of fluid pressure at the inlet, and fluid can enter the shell from the inlet and flow out from the outlet, so that the inlet is automatically opened.

In addition, when no negative pressure exists in the outlet, the elastic diaphragm is deformed in a recovery mode, meanwhile, the elastic diaphragm moves to the opposite direction under the action of the spring, the push rod of the elastic diaphragm acts on the linkage piece, and the linkage piece drives the blocking piece to close the inlet, so that the inlet is automatically closed.

The negative pressure valve provided by the utility model uses the negative pressure to act on the controlled piece through the elastic membrane, so that the push rod releases the control on the plugging piece to open the flow channel, the negative pressure effect is fully utilized, a special circuit is not required to be arranged for control and coordination, and a power supply is not required to be provided for the circuit, so that the negative pressure valve has the advantages of simple structure and lower cost.

According to the negative pressure valve disclosed by the utility model, the pushing rod is separated from the linkage piece to enable the blocking piece to be separated from the inlet by the action of the elastic membrane, so that a larger acting force can be generated on the pushing rod, the action of separating the blocking piece from the water inlet is more crisp, and the inlet can be easily opened as long as the outlet has smaller negative pressure.

The negative pressure valve is characterized in that the push rod of the controlled part acts on the linkage part from the side face and drives the blocking part to close the inlet, so that the blocking performance is better and the assembly is easier in the closed state, and in particular, the push rod is matched with the linkage part in an inclined manner, so that the operation is smoother.

Drawings

FIG. 1 is a schematic illustration of a cross-section of a closed state of one embodiment of the negative pressure valve of the present utility model;

FIG. 2 is a schematic diagram of the negative pressure valve of FIG. 1 in cross-section in an open state;

fig. 3 is an exploded schematic view of the components of the negative pressure valve of fig. 1.

Detailed Description

Specific embodiments of the utility model are described in detail below with reference to the accompanying drawings:

referring to fig. 1-3, the negative pressure valve of this specific implementation structure includes a valve body lower shell 1, a valve body upper shell 2, a controlled piece 3, an elastic diaphragm 4, a spring 5 and a blocking component are installed in a shell composed of the valve body lower shell 1 and the valve body upper shell 2, wherein the elastic diaphragm 4 is installed between the valve body lower shell 1 and the valve body upper shell 2, the valve body lower shell 1 is provided with an inlet 11 for fluid to enter and an outlet 12 for fluid to flow out, the blocking component is provided with a linkage piece 7, a blocking piece 8 and a fixing piece 9, the blocking piece 8 is sleeved on the linkage piece 7, the blocking piece 8 and the linkage piece 7 are installed at the inlet 11 by the fixing piece 9, the controlled piece 3 is sleeved with two springs 5, the controlled piece 3 can move upwards under the action of the two springs 5, the controlled piece 3 is provided with a push rod 3a, the push rod 3a is in oblique arrangement, the slope is in contact with the linkage piece 7, the push rod 3a acts on the linkage piece 7, the blocking piece 8 can be driven by the linkage piece 7 to block the left to close the inlet 11, the elastic diaphragm 4 is located above the push rod 3 and approaches or contacts the push rod 3, the elastic piece 4 can be contracted by the elastic diaphragm 4 and can move downwards under the action of the spring 3 to the slope piece 3 to overcome the action of the slope to the elastic diaphragm 4 and the elastic diaphragm 4 can move towards the slope piece 3 to the slope to overcome the displacement of the linkage piece 11 and the elastic piece 3 by the elastic diaphragm 4 is not to move towards the elastic piece 7 and the control piece to the control piece and move towards the slope 11 to the slope 11.

Thus, when negative pressure exists in the outlet 12, the elastic membrane 4 deforms and contracts, the controlled piece 3 moves downwards against the elastic force of the two springs 5, the push rod 3a is dislocated and does not act on the linkage piece 7 any more, the blocking piece 8 is separated from the inlet 12 in the fixed piece 9 under the action of fluid pressure at the inlet, and fluid can enter the shell from the inlet 11 and flow out from the outlet 12, so that the inlet is automatically opened; in addition, when the negative pressure no longer exists in the outlet 12, the elastic membrane 4 is restored to be deformed, meanwhile, the controlled piece 3 moves upwards under the action of the two springs 5, the push rod 3a of the controlled piece acts on the linkage piece 7 through the slope end part of the controlled piece, and the linkage piece 7 drives the blocking piece 8 to block the inlet 11, so that the inlet is automatically closed.

Claims

1. The negative pressure valve comprises a shell, wherein an elastic diaphragm, a controlled piece, a spring and a blocking component are arranged in the shell, the shell is provided with an inlet and an outlet, the blocking component is provided with a blocking piece, a linkage piece and a fixing piece, the blocking piece and the linkage piece are fixed together, and the blocking piece and the linkage piece are arranged at the inlet by the fixing piece.

2. The negative pressure valve of claim 1, wherein the pushrod is notched to allow the linkage to enter the notch to become misaligned.

3. The negative pressure valve of claim 1, wherein the push rod is disposed diagonally such that its ramp contacts the linkage, the linkage being acted upon by the ramp end, and the end being displaced to form the misalignment.