CN218934681U

CN218934681U - Corrugated pipe pump with limiting structure

Info

Publication number: CN218934681U
Application number: CN202223543169.0U
Authority: CN
Inventors: 卢周焕; 黄斗铁
Original assignee: Huangzheng Semiconductor Shandong Co ltd
Current assignee: Huangzheng Semiconductor Shandong Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-04-28
Anticipated expiration: 2032-12-21

Abstract

The application provides a corrugated pipe pump with a limiting structure, which solves the technical problems that the existing corrugated pipe pump cannot fundamentally avoid adhesion of corrugated teeth, so that the corrugated pipe pump cannot act and even liquid leakage risks exist; the valve comprises a shell, a valve core, two corrugated pipes and two push plates, wherein the valve core is arranged at the middle section of the shell, the corrugated pipes and the push plates are arranged in two air cavities enclosed by the shell and the valve core, and position sensors are arranged at the two ends of the shell; the push plate comprises a corrugated pipe connecting part connected with the corrugated pipe and a limit connecting part arranged at the periphery of the corrugated pipe connecting part, and a limit bump is connected with the same side of the corrugated pipe on the limit connecting part; the position of the shell opposite to the limit lug is provided with a fixed baffle. The application is widely applied to the technical field of bellows pumps.

Description

Corrugated pipe pump with limiting structure

Technical Field

The present application relates to a bellows pump, and more particularly, to a bellows pump with a limit structure.

Background

The bellows pump is a pump for realizing liquid transportation by stretching and contracting a bellows. The existing bellows pump generally comprises a shell, a valve core, a bellows and a push plate, wherein the two sides of the valve core are respectively connected with the bellows, the other side of the bellows is connected with the push plate, and the two push plates are connected through a connecting shaft penetrating through the valve core. An air cavity is formed between the shell and the push plate, and the inside of the corrugated pipe is communicated with the inner pipe of the valve core to form a liquid cavity. By alternately introducing high-pressure gas into the two air cavities of the shell, under the driving of air pressure, the push plate drives the corrugated pipe to reciprocally extrude the liquid cavity in the pipe, so that liquid entering from the liquid inlet of the valve core is pushed out from the liquid outlet of the valve core, and the function of conveying the liquid is realized continuously and circularly. In order to control the stroke of the corrugated pipe, position sensors are arranged at the two ends of the shell body and are used for sensing that the corrugated pipe moves in place and controlling the filling and the discharging of high-pressure gas, and then the action of the push plate is controlled by the pressure of the high-pressure gas, so that the stroke of the corrugated pipe is controlled.

The bellows material is high temperature resistant, corrosion resistant plastics such as PTFE, PFA, when running at normal atmospheric temperature, only relies on the position sensor to carry out bellows stroke control, rarely goes wrong. However, the sensitivity of the sensor detection at high temperatures is insufficient to support the high frequency motion requirements of the pump. When the temperature is increased, the tensile strength of the corrugated pipe is reduced, the moving speed of the high-temperature pushing plate is increased compared with that of the low-temperature pushing plate, at the moment, the braking distance is increased within the same time from the sensing of the position sensor to the switching of the action of the corrugated pipe, the stretching distance of the corrugated pipe is also increased, the compression distance of the corrugated pipe at the other side is correspondingly increased, and the corrugated teeth are completely attached when the corrugated pipe is compressed to a limit stroke. Thus, it is not ensured that the bellows can complete the operation switching before reaching the limit stroke.

When the corrugated pipe runs to a limit stroke, namely adjacent corrugated teeth are completely attached, the corrugated pipe is compressed to the maximum compression amount, and a closed low-pressure space is formed inside the corrugated pipe teeth under the action of the viscosity of gas and liquid and the elastic force of the corrugated pipe teeth, so that the adjacent corrugated teeth are not easy to disengage. When the push plate reversely starts to move, one or more corrugated teeth can not be stretched, the stroke is unchanged, the stretched distance of other corrugated teeth is increased, and the adjacent corrugated pipes are extremely easy to adhere or damage due to the reciprocating motion of the corrugated pipes under high speed and high pressure, so that serious problems such as incapacity of acting or liquid leakage of the corrugated pipe pump occur.

To prevent the bellows from breaking, the prior art: (1) Chinese patent application No. CN201480063489.5 discloses a fluid device which can prevent the corrugated tube from being broken by increasing the wall thickness of the central portion of the corrugated tube, thereby realizing a long service life. (2) Chinese patent application No. CN201280015948.3 discloses a bellows pump for improving pressure resistance of a bellows by integrally forming an annular ring portion at a predetermined position in an axial direction of the bellows.

However, the two methods just improve the pressure resistance of the corrugated pipe, and the situation that the corrugated teeth are adhered is not fundamentally avoided, so that the corrugated pipe pump cannot act, and even liquid leaks and the like are also risks.

Disclosure of Invention

In order to solve the problems, the technical scheme adopted by the application is as follows: the corrugated pipe pump with the limiting structure comprises a shell, a valve core, two corrugated pipes and two pushing plates, wherein the valve core is arranged at the middle section of the shell, the corrugated pipes and the pushing plates are arranged in two air cavities enclosed by the shell and the valve core, and position sensors are arranged at the two ends of the shell; the push plate comprises a corrugated pipe connecting part connected with the corrugated pipe and a limit connecting part arranged at the periphery of the corrugated pipe connecting part, and a limit bump is connected with the same side of the corrugated pipe on the limit connecting part; the position of the shell opposite to the limit lug is provided with a fixed baffle.

Preferably, the limit connecting parts of the two push plates are connected through a connecting shaft penetrating through the valve core and the fixed baffle table.

Preferably, the limit bump comprises a buffer cushion block and a connecting piece, and the buffer cushion block is connected with the limit connecting part through the connecting piece.

Preferably, the Shore hardness of the cushion block is greater than or equal to 70.

Preferably, the diameter of the cushion block is 8mm or more.

Preferably, the number of the limit bumps is plural and is uniformly distributed on the limit connecting portion.

Preferably, the two limiting connecting parts are respectively a first limiting connecting part and a second limiting connecting part, and are symmetrically and radially formed by extending at the periphery of the corrugated pipe connecting part.

Preferably, the shell comprises a left shell and a right shell which are oppositely arranged, wherein the left shell and the right shell comprise a shell barrel and an end cover which are provided with fixed baffle tables, one end of the shell barrel is connected with the valve core, and the other end of the shell barrel is connected with the end cover.

Preferably, the fixed baffle is of an annular structure, and the inner diameter of the annular structure is matched with the outer diameter of the corrugated pipe.

Preferably, a sealing ring is arranged between the shell and the end cover, the shape of the sealing ring is matched with that of the push plate, and the inner side size of the sealing ring is larger than the outer side size of the push plate.

The utility model has the beneficial effects of simple structure and reasonable design. Through increase on the push pedal be equipped with the spacing boss that the bellows homonymy set up, add fixed fender platform in the position that corresponds on the casing, both cooperate the contact to play spacing effect, avoid the bellows to move limit stroke, adjacent ripple tooth connects to trigger and give birth to the adhesion to consequently avoid the bellows consequently to take place the problem of damage and the unable operation of the pump body fundamentally. In addition, the limit bump is arranged on the push plate and is in a high-pressure gas environment, and peripheral high-pressure gas can weaken sound generated by limit impact. Secondly, spacing boss and bellows homonymy set up, and when it took place the striking with fixed fender platform contact, the direction of force was towards the case, is favorable to keeping the inseparable combination of casing and case, guarantees the leakproofness of inside cavity, prevents that gas from leaking. The limiting connecting parts of the two push plates are connected through the connecting shaft penetrating through the valve core and the fixed baffle table, so that the corrugated pipe pump can be improved to run more stably. The limit bump comprises a buffer cushion block and a connecting piece. The buffer cushion block has certain elasticity, and can effectively play a role in buffering the push plate. The Shore hardness of the buffer cushion block is more than or equal to 70, so that the buffer cushion block can bear frequent impact of the push plate and the fixed stop block.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a bellows pump of the present utility model in a front view;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic right-side view of the structure of fig. 1 (with the end cap removed).

The symbols in the drawings illustrate:

1. a housing; 2. a valve core; 3. a bellows; 4. a push plate; 5. an air cavity; 6. a position sensor; 7. a bellows connecting part; 8. a limit connecting part; 9. a limit bump; 10. a fixed baffle; 11. a connecting shaft; 12. a left housing; 13. a right housing; 14. a shell barrel; 15. an end cap; 16. and (3) sealing rings.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that, in the description of the present application, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

The bellows pump with the limit structure provided in the embodiment of the present application will now be described.

Referring to fig. 1 and 2, a schematic structural diagram of a bellows pump with a limiting structure in this embodiment is shown, and the bellows pump includes a housing 1, a valve core 2, two bellows 3 and two push plates 4, wherein the valve core 2 is arranged in the middle section of the housing 1, the bellows 3 and the push plates 4 are arranged in two air cavities 5 enclosed by the housing 1 and the valve core 2, and position sensors 6 are arranged at two ends of the housing 1; the push plate 4 comprises a corrugated pipe connecting part 7 connected with the corrugated pipe 3 and a limit connecting part 8 arranged at the periphery of the corrugated pipe connecting part 7, and a limit bump 9 is connected with the same side of the limit connecting part 8 as the corrugated pipe 3; the position on the shell 1 opposite to the limit lug 9 is provided with a fixed baffle table 10, the limit lug is in contact with the fixed baffle table 10 to play a limit role, and the limit role is played before the position sensor 6 controls the push plate 4 to finish braking, so that the bellows 3 is prevented from running to a limit stroke, and the adjacent bellows is meshed to trigger raw adhesion, so that the problems of breakage of the bellows 3 and incapability of running of a pump body are fundamentally avoided.

Further, by the pneumatic drive, the push plate 4 moves at a high speed, the position sensor 6 feeds back when the push plate 4 moves within the sensing distance, the reverse pneumatic charge is performed to slow down the push plate 4, and the high-temperature push plate 4 moves at a higher speed than the low-temperature push plate 4 because the tensile strength of the corrugated tube 3 is reduced in a high-temperature state, so that the braking distance is increased, the stretching distance of the corrugated tube 3 is also increased, and the compression distance of the corrugated tube 3 at the other side is correspondingly increased, so that adjacent corrugated teeth are contacted. The additionally arranged limit lug 9 and the fixed baffle table 10 can effectively control the braking distance of the push plate 4 in a high-temperature state, thereby controlling the gap between the corrugated teeth and avoiding the contact between the adjacent corrugated teeth.

In addition, the limit bump 9 is disposed on the push plate 4, and in a high-pressure gas environment, the surrounding high-pressure gas can attenuate the sound generated by the limit impact. Secondly, spacing boss sets up with bellows 3 homonymy, and when it took place the striking with fixed fender platform 10 contact, the direction of force was towards case 2, is favorable to keeping the inseparable combination of casing 1 and case 2, guarantees the leakproofness of inside cavity, prevents that gas from leaking.

In one embodiment, the limiting connection parts 8 of the two pushing plates 4 are connected through the connecting shafts 11 penetrating the valve core 2 and the fixed baffle table 10, so that the guiding effect is better, and the corrugated pipe pump operates more stably.

In one embodiment, the limit bump 9 includes a buffer pad and a connecting piece, and the buffer pad is connected with the limit connection portion 8 through the connecting piece. The buffer cushion block has certain elasticity and can effectively play a role in buffering the push plate 4. The connecting piece can be of a bolt and nut structure or a screw structure.

Further, the shore hardness of the cushion block is 70 or more, and the cushion block thus arranged can withstand frequent impacts of the push plate 4 with the fixed stopper. Furthermore, in order to achieve a good buffering effect on the impact between the push plate 4 and the fixed stop block, the diameter of the buffering cushion block is more than or equal to 8mm.

Further, the number of the limit protrusions 9 is plural and is uniformly distributed on the limit connection portion 8. Referring to fig. 3, in the present embodiment, four limit bumps 9 are symmetrically distributed two by two.

The limit connecting part 8 can be of an integral annular structure or a split structure. Preferably, in the present embodiment, referring to fig. 3, the limiting connection portion 8 is a split structure, and two limiting connection portions are provided, which are symmetrically and radially extended from the periphery of the bellows connection portion 7. Compared with the round push plate 4 in the prior art, the added limit connecting part 8 increases the contact area of the push plate 4 and high-pressure gas, and can more effectively improve the pneumatic transmission efficiency, thereby improving the working efficiency of the bellows pump.

Referring to fig. 2, for easy assembly, the housing 1 includes a left housing 12 and a right housing 13 disposed opposite to each other, the left housing 12 and the right housing 13 each include a housing tube 14 provided with a fixed stop 10, and an end cover 15, one end of the housing tube 14 is connected to the valve core 2, and the other end of the housing tube 14 is connected to the end cover 15. Specifically, the connection may be a fixed connection or a detachable connection. The detachable connection can be realized by adopting a bolt and other connection modes.

Further, the fixed baffle 10 has an annular structure, and the inner diameter of the annular structure is matched with the outer diameter of the corrugated pipe 3. Referring to fig. 2 and 3, a sealing ring 16 is disposed between the casing 14 and the end cover 15 to seal the air cavity 5. The shape of the sealing ring 16 is matched with that of the pushing plate 4, and the inner side size of the sealing ring 16 is larger than the outer side size of the pushing plate 4.

The utility model has simple structure and reasonable design. Through increase on push pedal 4 have with the spacing boss that bellows 3 homonymy set up, add fixed fender platform 10 in the corresponding position on casing 1, both cooperate the contact to play spacing effect, avoid bellows 3 to move to limit stroke, adjacent ripple tooth connects to trigger and takes place the adhesion to thereby avoid bellows 3 consequently to take place the problem of damage and the unable operation of the pump body fundamentally. In addition, the limit bump 9 is disposed on the push plate 4, and in a high-pressure gas environment, the surrounding high-pressure gas can attenuate the sound generated by the limit impact. Secondly, spacing boss and bellows 3 homonymy set up, and when it took place the striking with fixed fender platform 10 contact, the direction of force was towards case 2, is favorable to keeping the inseparable combination of casing 1 and case 2, guarantees the leakproofness of inside cavity, prevents gas leakage.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. The corrugated pipe pump with the limiting structure comprises a shell, a valve core, two corrugated pipes and two pushing plates, wherein the valve core is arranged at the middle section of the shell, the corrugated pipes and the pushing plates are arranged in two air cavities enclosed by the shell and the valve core, and position sensors are arranged at the two ends of the shell; the method is characterized in that: the push plate comprises a corrugated pipe connecting part connected with the corrugated pipe and a limit connecting part arranged at the periphery of the corrugated pipe connecting part, and a limit bump is connected with the same side of the limit connecting part as the corrugated pipe; the position on the shell opposite to the limiting lug is provided with a fixed baffle.

2. The bellows pump with limit structure of claim 1, wherein: the limiting connecting parts of the two pushing plates are connected through a connecting shaft penetrating through the valve core and the fixed baffle table.

3. The bellows pump with limit structure of claim 1, wherein: the limiting projection comprises a buffer cushion block and a connecting piece, and the buffer cushion block is connected with the limiting connecting part through the connecting piece.

4. A bellows pump with a limit structure as claimed in claim 3, wherein: the Shore hardness of the buffer cushion block is more than or equal to 70.

5. A bellows pump with a limit structure as claimed in claim 3 or 4, wherein: the diameter of the buffer cushion block is more than or equal to 8mm.

6. The bellows pump with limit structure of claim 2, wherein: the number of the limit protruding blocks is plural and is uniformly distributed on the limit connecting part.

7. The bellows pump with limit structure of claim 6, wherein: the two limiting connecting parts are respectively a first limiting connecting part and a second limiting connecting part, and are symmetrically and radially extended to the periphery of the corrugated pipe connecting part.

8. The bellows pump with limit structure according to any one of claims 1-4, wherein: the shell comprises a left shell body and a right shell body which are oppositely arranged, wherein the left shell body and the right shell body comprise a shell barrel and an end cover which are provided with fixed baffle tables, one end of the shell barrel is connected with the valve core, and the other end of the shell barrel is connected with the end cover.

9. The bellows pump with limit structure according to any one of claims 1-4, wherein: the fixed baffle is of an annular structure, and the inner diameter of the annular structure is matched with the outer diameter of the corrugated pipe.

10. The bellows pump with limit structure of claim 8, wherein: the shell cylinder is provided with a sealing ring between the end cover, the shape of the sealing ring is matched with that of the push plate, and the inner side size of the sealing ring is larger than the outer side size of the push plate.