CN212960014U

CN212960014U - Pressure valve type back suction pump

Info

Publication number: CN212960014U
Application number: CN202021572277.9U
Authority: CN
Inventors: 沈利庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-04-13
Anticipated expiration: 2030-08-03

Abstract

A pressure valve type suck-back pump, by the head cap, upper seal ring, upper tie rod, large circle, valve casing, piston, valve base, spring and lower one-way valve make up, there are liquid outlets on the head cap, the liquid outlet seals and fixes through the upper seal ring with head cap, large circle and valve casing, there are whorls linking with body of the bottle on the inner wall of the large circle; the head cap is fixedly connected with the upper connecting rod, and the bottom of the upper connecting rod is provided with a valve seat and a piston; the valve seat moves along with the upper connecting rod and the piston, and a fixing groove of a spring is arranged at the bottom of the valve seat; the valve seat is provided with a resorption rod which penetrates through the valve seat and then extends into the liquid inlet cavity, the top of the spring rod is provided with a pressure valve rod, and the resorption rod is formed by fixedly connecting the pressure valve rod and the spring rod. The problem that a small amount of liquid seeps out after water enters the air inlet cavity of the foam pump with the original breathing piece structure is solved.

Description

Pressure valve type back suction pump

Technical Field

The invention relates to pumps, in particular to a pressure valve type back suction pump.

Background

The pressure pump bottle is a common packaging mode of hand sanitizer and shampoo, and the pressure pump consists of a pair of one-way valves and a compression cavity with variable volume. The lower one-way valve is connected with the suction pipe, the upper one-way valve is connected with the liquid outlet, and a variable-capacity compression cavity is arranged between the upper one-way valve and the lower one-way valve. Generally, a liquid outlet cavity is formed between the check valve and the liquid outlet.

When the volume of the compression cavity is changed, the volume of the liquid outlet cavity between the upper check valve and the liquid outlet is not changed, so that the emulsion in the liquid outlet cavity can only flow out of the compression cavity and the emulsion can only flow out of the liquid outlet, and the liquid outlet cavity can be filled with the emulsion. The residual emulsion is left at the liquid outlet, and part of the emulsion which can slowly flow out is hung on the bottle mouth or the bottle body under the pressure action of the bottle body. These emulsions tend to dry and harden after prolonged exposure to air, become contaminated with the environment, and even block the exit orifice, which can affect the consumer experience when the emulsion is used next time.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the problem of among the prior art, traditional press pump is at the in-process that resets, and it is long-pending unchangeable to go out the liquid cavity, leads to the raffinate that the liquid outlet left is solved.

The invention adopts the technical scheme for solving the problems as follows: the invention adopts the technical scheme for solving the problems as follows: a pressure valve type suck-back pump, by the head cap, upper seal ring, upper tie rod, large circle, valve casing, piston, valve base, spring and lower one-way valve make up, there are liquid outlets on the head cap, the liquid outlet seals and fixes through the upper seal ring with head cap, large circle and valve casing, there are whorls linking with body of the bottle on the inner wall of the large circle; the head cap is fixedly connected with the upper connecting rod, and the bottom of the upper connecting rod is provided with a valve seat and a piston; the valve seat moves along with the upper connecting rod and the piston, and a fixing groove of a spring is arranged at the bottom of the valve seat; the method is characterized in that: the valve seat is provided with a resorption rod which penetrates through the valve seat and then extends into the liquid inlet cavity, the top of the spring rod is provided with a pressure valve rod, and the resorption rod is formed by fixedly connecting the pressure valve rod and the spring rod; an inner valve core is arranged between the valve seat and the piston, the inner valve core slides between the pressure valve rod and the valve seat, and the inner valve core and the valve seat form an upper one-way valve; the inner ring of the piston is provided with an inner support which limits the moving distance between the inner valve core and the valve seat.

And a pressure valve ring is arranged at the top of the pressure valve rod, and when the pressure valve rod rises to the maximum height, the pressure valve ring presses the inner valve core downwards, so that the one-way channel of the inner valve core and the valve seat is completely closed.

The piston and the upper connecting rod are integrated.

And a suck-back rod consisting of the pressure valve rod and the spring rod extends into the liquid outlet cavity from the valve seat and occupies a part of the space of the liquid outlet cavity.

The head cap is provided with locking threads, the large ring is provided with an initial cover, and the inner side of the initial cover is provided with fixing threads matched with the locking threads on the head cap.

Be provided with the slope on the valve casing inner wall, be provided with the slope on the spring beam.

Compared with the prior art, the invention adopts the structural design of the inner valve core to control the opening and closing of the upper check valve. When the spring is reset and the valve seat moves upwards, a channel in the liquid outlet cavity and the compression cavity is closed through a gap difference between the upper connecting rod and the valve seat, and meanwhile, a suckback rod formed by the pressure valve rod and the spring rod does not move relative to the valve shell along with the upward movement of the valve seat, so that the suckback rod occupies smaller and smaller space of the liquid outlet cavity, namely the space of the liquid outlet cavity is changed in volume and gradually increased, and therefore residual liquid at the liquid outlet is sucked back into the liquid outlet cavity in the resetting process, and the technical problem of the invention is solved.

In the invention, the upper one-way valve is formed by adopting the inner valve core and the valve seat, the motion resistance of the inner valve core in fluid is utilized, the motion of the inner valve core relative to the upper connecting rod generates hysteresis, and the upper one-way valve is opened and closed by utilizing the hysteresis.

The invention provides two product structures, namely an embodiment I without an initial state and an embodiment II with the initial state. In the initial state, the spring is fully compressed and locked by the initial cap on the large ring and the threads on the head cap. The head cap is rotated to disengage the initial cap and return to a static state.

Drawings

Fig. 1 is a static structure diagram of the first embodiment.

Fig. 2 is a structural diagram in the compression process of the first embodiment.

Fig. 3 is a structural diagram in the reset process in the first embodiment.

Fig. 4 is a structural diagram of an initial state of the second embodiment.

Fig. 5 is a static structure diagram of the second embodiment.

Fig. 6 is a structural diagram in the compression process of the second embodiment.

Fig. 7 is a structural diagram in the reset process of the second embodiment.

Fig. 8 is an enlarged view at the piston and valve seat.

Wherein 1 is the head cap, 2 is the upper connecting rod, 3 is the big circle, 4 is the upper seal circle, 5 is the piston, 6 is the valve casing, 7 is the disk seat, 8 is the spring, 9 is lower check valve, 10 is the resorption pole, 11 is initial lid, 12 is the spring pole, 13 is the pressure valve rod, 14 is the pressure valve ring, 15 is interior support.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

A pressure valve type suck-back pump is composed of a head cap, an upper connecting rod, a large ring, an upper sealing ring, a piston, a valve casing, a valve seat, a spring, a suck-back rod and a lower one-way valve, wherein the suck-back rod is composed of a spring rod and a pressure valve rod which are fixedly connected together.

The large ring is used for being in threaded connection with the bottle body to seal liquid in the bottle. The head cap is fixedly connected with the upper connecting rod, a liquid outlet and a liquid outlet channel are arranged on the head cap, and the liquid outlet channel and the inner channel of the upper connecting rod form a liquid outlet cavity. The upper sealing ring seals and fixes the upper piston rod and the large ring and allows the upper connecting rod to slide and seal. The bottom of the upper connecting rod is provided with a valve seat which blocks the lower outlet of the inner channel of the upper connecting rod. The piston and the outer side of the bottom of the upper connecting rod.

The valve seat is internally provided with a one-way channel from the compression cavity to the liquid outlet cavity, and the upper position and the lower position of the inner valve core control the opening and closing of the one-way channel. The spring is fixed between the valve seat and the spring rod base, the spring rod is fixed on the upper side of the lower one-way valve of the valve shell, and the part between the lower one-way valve and the valve seat is a compression cavity. The top of the suck-back rod penetrates through the valve seat and then extends into the upper connecting rod, namely into the liquid outlet cavity.

An air pressure balancing hole is formed in the valve shell.

Fig. 1 is a static, fully spring-extended, no external force applied condition. In this state, the spring pushes the valve seat upwards to drive the upper connecting rod, the piston and the head cap to rise to the highest point, the inner valve core is limited by the pressure valve rod, and the upper check valve formed by the inner valve core and the valve seat is closed. The compression cavity and the liquid outlet cavity are separated, at the moment, the volume of the compression cavity is the largest, and the volume of the liquid outlet cavity is the largest.

Fig. 2 is a pressing state, at the moment, the head cap is pressed to drive the upper connecting rod, the piston and the valve seat to move downwards, the compression spring reduces the volume of the compression cavity, the lower one-way valve is blocked, the liquid pressure in the compression cavity is greater than the liquid outlet cavity, so that the inner valve core moves upwards until the inner valve core is driven by the inner support of the inner wall of the piston to move downwards along with the piston.

At the moment, a channel between the inner valve core and the valve seat is opened, and liquid or gas in the compression cavity is allowed to enter the liquid outlet cavity and be discharged from the liquid outlet. Along with the descending of the piston and the valve seat, the position of the suck-back rod is always fixed, so that the suck-back rod consisting of the pressure valve rod and the spring rod extends into the liquid outlet cavity more and more, occupies a certain volume, and the volume of the liquid outlet cavity is correspondingly reduced while the volume of the compression cavity is reduced.

Fig. 3 is a reset state, the pressure of the head cap is removed, the spring resets, the valve seat drives the upper connecting rod and the head cap to move upwards, and the passage between the piston and the valve seat is closed due to the hysteresis effect of the piston, so that when the compression cavity expands, the emulsion is sucked from the bottle body into the compression cavity through the lower one-way valve from the suction pipe.

When the valve seat is reset, the valve seat moves upwards, the part of the pressure valve rod, which enters the liquid outlet cavity, is less and less, namely the liquid outlet cavity is expanded, so that the liquid outlet cavity generates a back suction force, and residual liquid of the liquid outlet is sucked back into the liquid outlet cavity. The design purpose of the invention is achieved.

The second embodiment is that an initial state, namely the minimum packing state during sale, is added on the basis of the first embodiment, an initial cover is added on a large circle, the head cap is provided with locking threads, and the inner side of the initial cover is provided with fixing threads matched with the locking threads on the head cap. By this screw-fit, the large ring and the head cap are directly screw-fixed when the spring is compressed to the maximum. At the moment, the liquid outlet cavity and the compression cavity are in the minimum volume state. The fixed thread is loosened in a rotating mode, the head cap, the upper connecting rod, the piston and the valve seat are all lifted under the action of the spring, and the compression cavity is increased in volume to achieve automatic liquid inlet. The second embodiment corresponds to the first embodiment when in use, i.e. fig. 5-7 correspond to fig. 1-3.

In an initial state, the inner core of the valve seat is tightly matched with the slope surface on the spring rod, the bottom of the valve seat is tightly matched with the slope surface of the valve shell, and a gap between the compression cavity and the liquid outlet cavity is completely sealed, namely the sliding fit part is completely sealed in a tight fit manner; in addition, when the thread of the head cap is screwed to the lowest position, the bottom of the head cap and the bottom of the initial cover are completely sealed, and liquid in the bottle is prevented from seeping along the gap of the head cap along the air pressure balance hole on the valve shell when the bottle is inverted.

Claims

1. A pressure valve type suck-back pump, by the head cap, upper seal ring, upper tie rod, large circle, valve casing, piston, valve base, spring and lower one-way valve make up, there are liquid outlets on the head cap, the liquid outlet seals and fixes through the upper seal ring with head cap large circle and valve casing, there are whorls linking with body of the bottle on the inner wall of the large circle; the head cap is fixedly connected with the upper connecting rod, and the bottom of the upper connecting rod is provided with a valve seat and a piston; the valve seat moves along with the upper connecting rod and the piston, and a fixing groove of a spring is arranged at the bottom of the valve seat; the method is characterized in that: the valve seat is provided with a spring rod which penetrates through the valve seat and then extends into the liquid inlet cavity, the top of the spring rod is provided with a pressure valve rod, and the pressure valve rod is fixedly connected with the spring rod to form a suck-back rod; an inner valve core is arranged between the valve seat and the piston, the inner valve core slides between the pressure valve rod and the valve seat, and the inner valve core and the valve seat form an upper one-way valve; the inner ring of the piston is provided with an inner support which limits the moving distance between the inner valve core and the valve seat.

2. A pressure-gated suck back pump according to claim 1, wherein: and a pressure valve ring is arranged at the top of the pressure valve rod, and when the pressure valve rod rises to the maximum height, the pressure valve ring presses the inner valve core downwards, so that the one-way channel of the inner valve core and the valve seat is completely closed.

3. A pressure-gated suck back pump according to claim 1, wherein: the piston is arranged on the upper connecting rod.

4. A pressure-gated suck back pump according to claim 1, wherein: and a suck-back rod consisting of the pressure valve rod and the spring rod extends into the liquid outlet cavity from the valve seat and occupies a part of the space of the liquid outlet cavity.