CN-224228829-U - Corrugated pipe cavity structure of constant flow pump

CN224228829UCN 224228829 UCN224228829 UCN 224228829UCN-224228829-U

Abstract

The application provides a corrugated pipe cavity structure of a constant flow pump, wherein when a driving piece moves away from a pump head, the outer surface of a corrugated pipe and the inner wall of a mounting cavity are enclosed to form a liquid cavity so as to suck liquid into the liquid cavity through a liquid inlet, and when the driving piece moves close to the pump head, the driving piece drives the corrugated pipe to extrude so as to discharge the liquid from the liquid cavity through the liquid outlet, the corrugated pipe stretches into the mounting cavity, and the external stress environment of the corrugated pipe is more controlled. The mounting cavity is of a rigid structure, and can provide physical limit and support for the corrugated pipe, so that transverse expansion or accidental deformation is limited, and errors caused by flexibility of the corrugated pipe material are avoided. The consistency and predictability of the corrugated pipe deformation are effectively controlled, the volume precision of the pumped liquid is obviously improved, and the high-precision constant-current control is facilitated.

Inventors

LU JUN
XIONG ZHIHUA
DONG LINGYUN

Assignees

深圳市益思精密五金有限公司

Dates

Publication Date: 20260512
Application Date: 20250724

Claims (10)

1. The utility model provides a bellows die cavity structure of constant flow pump which characterized in that includes: The pump head is provided with a liquid inlet, a liquid outlet and a mounting cavity; One end of the corrugated pipe is fixed on the pump head, and the other end of the corrugated pipe extends into the mounting cavity; The driving piece is fixedly connected with the corrugated pipe so as to drive the corrugated pipe to reciprocate in the mounting cavity; When the driving piece moves away from the pump head, the outer surface of the corrugated pipe and the inner wall of the mounting cavity are enclosed to form a liquid cavity, so that liquid is sucked into the liquid cavity through the liquid inlet; when the driving piece moves close to the pump head, the driving piece drives the corrugated pipe to extrude so as to discharge liquid from the liquid cavity through the liquid outlet.
2. The bellows cavity structure of a constant flow pump according to claim 1, wherein the bellows comprises: A first mounting portion provided on the pump head; One end of the corrugated part is fixedly connected with the first mounting part, and the corrugated part is completely accommodated in the mounting cavity; The second installation department, with ripple portion keep away from the one end fixed connection of first installation department, and with driving piece fixed connection, the second installation department ripple portion with enclose between the installation cavity inner wall and establish and form the liquid chamber.
3. The bellows cavity structure of the constant flow pump according to claim 2, wherein a fixing cavity is enclosed between the first mounting portion, the second mounting portion and the bellows portion, and one end of the driving member extends into the fixing cavity and is fixedly connected with the second mounting portion.
4. The bellows type cavity structure of a constant flow pump according to claim 2, wherein the expansion and contraction direction of the driving member is denoted as a first direction, the expansion and contraction direction of the bellows portion is set along the first direction, and the installation cavity is set along the first direction.
5. The bellows cavity structure of the constant flow pump according to claim 2, wherein the diameter of the installation cavity is denoted as a, the maximum diameter of the bellows is denoted as b, and the relation a=b is satisfied.
6. The bellows cavity structure of a constant flow pump according to claim 2, wherein said mounting cavity is in clearance fit with said bellows.
7. The bellows cavity structure of the constant flow pump according to claim 3, wherein a fixing groove is formed at one end of the pump head, which is close to the driving piece; the bellows cavity structure of constant flow pump still includes: The fixed plate is arranged at one end of the pump head, which is close to the driving piece, and the first installation part is positioned in the fixed groove, the first installation part is clamped between the fixed plate and the pump head, the fixed plate is provided with a communication hole, and the driving piece penetrates through the communication hole and extends into the fixed cavity.
8. The bellows cavity structure of the constant flow pump according to claim 1, wherein the pump head is provided with a liquid inlet channel communicated with the liquid inlet; the bellows cavity structure of constant flow pump still includes: The first one-way valve group is arranged in the liquid inlet channel to control the communication and closing of the liquid inlet; the first check valve group includes: The first mounting cylinder is internally provided with a first fixed channel, and is provided with a first hole communicated with the first fixed channel and the liquid cavity; One end of the first elastic piece is abutted against the inner wall of the first fixed channel; The first valve body is arranged at the other end of the first elastic piece.
9. The bellows cavity structure of the constant flow pump according to claim 8, wherein the pump head is provided with a liquid outlet channel communicated with the liquid outlet; the bellows cavity structure of constant flow pump still includes: The second one-way valve group is arranged in the liquid outlet channel to control the communication and closing of the liquid outlet, and the direction of the second one-way valve group is opposite to that of the first one-way valve group; The second check valve group includes: The second mounting cylinder is internally provided with a second fixed channel, and a second hole communicated with the second fixed channel and the liquid cavity is formed in the second mounting cylinder; One end of the second elastic piece is abutted against the inner wall of the second fixed channel; the second valve body is arranged at the other end of the second elastic piece.
10. The corrugated pipe cavity structure of the constant flow pump according to claim 1, wherein the liquid inlet and the liquid outlet are formed in the peripheral wall of the installation cavity, the liquid inlet and the liquid outlet are respectively formed in two sides of the corrugated pipe, the maximum distance from the liquid inlet to the liquid outlet in the axial direction of the driving piece is marked as c, the maximum stroke of the driving piece is marked as d, and the relation that c is larger than or equal to d is satisfied.

Description

Corrugated pipe cavity structure of constant flow pump Technical Field The application relates to the field of constant flow pumps, in particular to a corrugated pipe cavity structure of a constant flow pump. Background The constant flow pump is widely applied to various industries due to higher accuracy of liquid pumped by the constant flow pump, so that the effect of adjustable accuracy of output liquid is achieved. The part constant flow pump is composed of a pump head, a corrugated pipe and a driving structure, wherein the inlet and outlet channels of the pump head are respectively communicated with the corrugated pipe, one end of the corrugated pipe is connected with the driving structure, and the corrugated pipe is driven to compress or stretch in the stretching process of the driving structure, so that the inlet and outlet channels of the pump head are respectively opened or closed to realize liquid suction or pumping. Because the corrugated pipe adopts the pipe wall arrangement of the folds, every fold or open a cell of folds, a cell of liquid is pumped or sucked, so that the high-precision output of the liquid is realized. However, the existing bellows is arranged outside the pump head, one end of the bellows is communicated with the pump head, and in the telescopic process of the driving structure, the bellows has certain flexibility due to the fact that materials of the bellows are deformed under the combined action of the driving structure and pressure (suction liquid is negative pressure, pumped liquid can have the gravity influence of the liquid), so that the volume of an internal cavity of the bellows changes, the liquid outlet precision is affected, and the liquid is not convenient to be sucked or pumped by high-precision control. Disclosure of utility model In view of the foregoing, it is necessary to provide a bellows cavity structure of a constant flow pump to solve the above-mentioned problems. The embodiment of the application provides a corrugated pipe cavity structure of a constant flow pump, which comprises the following components: The pump head is provided with a liquid inlet, a liquid outlet and a mounting cavity; One end of the corrugated pipe is fixed on the pump head, and the other end of the corrugated pipe extends into the mounting cavity; The driving piece is fixedly connected with the corrugated pipe so as to drive the corrugated pipe to reciprocate in the mounting cavity; When the driving piece moves away from the pump head, the outer surface of the corrugated pipe and the inner wall of the mounting cavity are enclosed to form a liquid cavity, so that liquid is sucked into the liquid cavity through the liquid inlet; when the driving piece moves close to the pump head, the driving piece drives the corrugated pipe to extrude so as to discharge liquid from the liquid cavity through the liquid outlet. In at least one embodiment of the present application, the bellows includes: A first mounting portion provided on the pump head; One end of the corrugated part is fixedly connected with the first mounting part, and the corrugated part is completely accommodated in the mounting cavity; The second installation department, with ripple portion keep away from the one end fixed connection of first installation department, and with driving piece fixed connection, the second installation department ripple portion with enclose between the installation cavity inner wall and establish and form the liquid chamber. In at least one embodiment of the present application, a fixing cavity is defined between the first mounting portion, the second mounting portion and the corrugated portion, and one end of the driving member extends into the fixing cavity and is fixedly connected with the second mounting portion. In at least one embodiment of the present application, the expansion and contraction direction of the driving member is denoted as a first direction, the expansion and contraction direction of the bellows portion is set along the first direction, and the installation cavity is set along the first direction. In at least one embodiment of the present application, the diameter of the installation cavity is denoted as a, the maximum diameter of the bellows is denoted as b, and the relation a=b is satisfied. In at least one embodiment of the application, the mounting cavity is in clearance fit with the bellows. In at least one embodiment of the present application, a fixing groove is formed at one end of the pump head, which is close to the driving piece; the bellows cavity structure of constant flow pump still includes: The fixed plate is arranged at one end of the pump head, which is close to the driving piece, and the first installation part is positioned in the fixed groove, and the first installation part is clamped between the fixed plate and the pump head. In at least one embodiment of the present application, the fixing plate is provided with a communication hole, and the driving member