CN108626104B - Evacuating-proof device - Google Patents
Evacuating-proof device Download PDFInfo
- Publication number
- CN108626104B CN108626104B CN201810654444.5A CN201810654444A CN108626104B CN 108626104 B CN108626104 B CN 108626104B CN 201810654444 A CN201810654444 A CN 201810654444A CN 108626104 B CN108626104 B CN 108626104B
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- China
- Prior art keywords
- conductive contact
- strain body
- contact piece
- control circuit
- reduced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 230000002265 prevention Effects 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
The invention discloses an anti-evacuation device, which comprises a control circuit, a first control circuit and a second control circuit, wherein the control circuit comprises a strain body, a first conductive contact piece and a second conductive contact piece, and the strain body is made of an elastic material, so that when the pressure intensity in the strain body is reduced, the volume of the strain body is reduced; the strain body is arranged in a hollow mode, the strain body is provided with an air inlet and an air extraction opening, and when the pressure in the strain body is reduced, the contact state between the first conductive contact piece and the second conductive contact piece is changed into mutual abutting from mutual separation, or is changed into mutual separation from mutual abutting. By adopting the mode, the separated feedback electric signals of the conductive contact pieces which are mutually communicated are utilized, compared with the photoelectric induction, electromagnetic induction and the like, the feedback of the pressure signals can be completed by only arranging the two conductive contact pieces and the elastic strain body, so that the pump is controlled to stop. The present invention relates to safety devices, and in particular to an evacuation prevention device.
Description
Technical Field
The present invention relates to safety devices, and in particular to an evacuation prevention device.
Background
In the process of extracting gas or liquid, if the pump is not stopped in time after being evacuated, the pump is easy to overload to damage on one hand, and on the other hand, the container is easy to damage. When the gas is extracted from a living body, the gas is liable to be damaged. Therefore, the air pressure must be monitored during the extraction process, and the conventional general evacuation-proof device is manufactured at high cost by adding photoelectric induction or electromagnetic induction to the U-shaped pressure gauge.
Disclosure of Invention
The invention aims to solve the technical problems that: a lower cost evacuation device is provided.
The invention solves the technical problems as follows: an anti-evacuation device comprises a control circuit, a first control circuit and a second control circuit, wherein the control circuit comprises a strain body, a first conductive contact and a second conductive contact, the strain body is made of an elastic material, so that when the pressure intensity in the strain body is reduced, the volume of the strain body is reduced; the strain body is arranged in a hollow mode, an air inlet and an air extraction opening are formed in the strain body, and at least one of the first conductive contact piece and the second conductive contact piece is fixed on the strain body; when the pressure in the strain body is reduced, the contact state between the first conductive contact piece and the second conductive contact piece is changed from mutual separation to mutual abutting or from mutual abutting to mutual separation; the first conductive contact and the second conductive contact are connected with the control circuit.
As a further improvement of the above technical solution, the first conductive contact and the second conductive contact are both fixed on the strain body, and when the pressure in the strain body becomes smaller, the contact state of the first conductive contact and the second conductive contact is changed from being separated from each other to being in contact with each other.
Further as a preferred embodiment, the first conductive contact 2 is fixed on the left side of the strain body 1, and the right side of the first conductive contact 2 is provided with a bending section I; the second conductive contact 3 is fixed on the right side of the strain body 1, and a bending section II is arranged on the left side of the second conductive contact 3.
As a further improvement of the technical scheme, the air extraction opening is also provided with a one-way valve, and the one-way valve enables air flow to flow out of the strain body only from the strain body.
As a further improvement of the technical scheme, the novel electric power device further comprises a shell, wherein the left side and the right side of the shell are respectively provided with an air inlet hole and an air exhaust hole, the air inlet is fixed in the air inlet hole, the air exhaust hole is fixed in the air exhaust hole, the first conductive contact piece and the second conductive contact piece are respectively fixed on the upper side of the strain body and the inner surface of the upper side of the shell, and when the pressure in the strain body is reduced, the contact state of the first conductive contact piece and the second conductive contact piece is changed into mutual separation from mutual butt.
As a further improvement of the above technical scheme, the strain body is spherical.
The beneficial effects of the invention are as follows: by arranging the conductive contact on the strain body, when the air pressure is reduced, the volume of the strain body is reduced, the conductive contact fixed on the strain body is reduced, and the position of the conductive contact is changed, so that the signal is changed; by adopting the mode, the separated feedback electric signals of the conductive contact pieces which are mutually communicated are utilized, compared with the photoelectric induction, electromagnetic induction and the like, the feedback of the pressure signals can be completed by only arranging the two conductive contact pieces and the elastic strain body, so that the pump is controlled to stop.
The present invention relates to safety devices, and in particular to an evacuation prevention device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the invention, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a low pressure state of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a high pressure state of an embodiment of the present invention;
FIG. 3 is a schematic illustration of a low pressure condition with a housing according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the high air pressure state with the housing according to an embodiment of the present invention.
Detailed Description
The conception, specific structure, and technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention. In addition, all coupling/connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to the fact that a more optimal coupling structure may be formed by adding or subtracting coupling aids depending on the particular implementation. The technical features in the invention can be interactively combined on the premise of no contradiction and conflict.
Referring to fig. 1 to 4, an evacuation-proof device includes a control circuit including a strain body 1, a first conductive contact 2, and a second conductive contact 3, wherein the strain body 1 is made of an elastic material, so that when the pressure in the strain body 1 becomes smaller, the volume of the strain body 1 becomes smaller; the strain body 1 is arranged in a hollow manner, the strain body 1 is provided with an air inlet 12 and an air extraction opening 11, and at least one of the first conductive contact piece 2 and the second conductive contact piece 3 is fixed on the strain body 1; when the pressure in the strain body 1 becomes smaller, the contact state between the first conductive contact piece 2 and the second conductive contact piece 3 is changed from mutual separation to mutual abutting or from mutual abutting to mutual separation; the first conductive contact piece 2 and the second conductive contact piece 3 are connected with a control circuit.
By arranging the conductive contact on the strain body, when the air pressure is reduced, the volume of the strain body is reduced, the conductive contact fixed on the strain body is reduced, and the position of the conductive contact is changed, so that the signal is changed; by adopting the mode, the separated feedback electric signals of the conductive contact pieces which are mutually communicated are utilized, compared with the photoelectric induction, electromagnetic induction and the like, the feedback of the pressure signals can be completed by only arranging the two conductive contact pieces and the elastic strain body, so that the pump is controlled to stop. Specifically, when the strain body is a spherical air bag, the first metal contact piece and the second metal contact piece are separated from each other when the pressure in the spherical air bag is higher than one atmosphere, and when the pressure in the air bag is reduced to be just equal to one atmosphere, the first metal contact piece is connected with the second metal contact piece, so that the strain body can be conducted with a circuit of the first metal contact piece and the second metal contact piece, a feedback signal is provided for a control circuit, and the control pump stops working, so that the effect of preventing evacuation is achieved.
Further, in a preferred embodiment, the first conductive contact 2 and the second conductive contact 3 are both fixed on the strain body 1, and when the pressure in the strain body 1 becomes smaller, the contact state of the first conductive contact 2 and the second conductive contact 3 is changed from being separated from each other to being in contact with each other. By fixing the first conductive contact and the second conductive contact to the strain body, the structure thereof is simpler and more compact.
Further as a preferred embodiment, the first conductive contact 2 is fixed on the left side of the strain body 1, and the right side of the first conductive contact 2 is provided with a bending section I; the second conductive contact 3 is fixed on the right side of the strain body 1, and a bending section II is arranged on the left side of the second conductive contact 3. Therefore, by increasing the contact area of the first conductive contact and the second conductive contact, when the strain body cannot be completely recovered after multiple deformations, the first conductive contact and the second conductive contact are easier to contact, and the situation that the first conductive contact and the second conductive contact cannot be normally contacted due to the fact that the strain body cannot be recovered is not easy to occur.
Further as a preferred embodiment, the air extraction opening 11 is further provided with a one-way valve, and the one-way valve enables air flow to flow from the strain body 1 to the outside of the strain body 1 only. When the evacuation pump is kept in a communication state with the strain body after the evacuation pump stops working, the one-way valve can prevent the gas or liquid pumped by the evacuation pump from flowing back into the strain body.
Further as the preferred embodiment, the electric power generating device further comprises a shell 4, wherein an air inlet hole and an air exhaust hole are respectively formed in the left side and the right side of the shell 4, an air inlet 12 is fixed in the air inlet hole, an air exhaust hole 11 is fixed in the air exhaust hole, a first conductive contact piece 2 and a second conductive contact piece 3 are respectively fixed on the upper side of the strain body 1 and the inner surface of the upper side of the shell 4, and when the pressure in the strain body 1 is reduced, the contact state of the first conductive contact piece 2 and the second conductive contact piece 3 is changed into mutual separation from mutual butt. Specifically, when the air pressure in the strain body is reduced to be equal to one atmosphere, the contact state of the first conductive contact piece and the second conductive contact piece is changed from being mutually abutted to being mutually separated. There is the clearance between first conductive contact and the second conductive contact, when the internal atmospheric pressure of straining slightly is greater than atmospheric pressure, strain the body and take place elastic strain, first conductive contact offsets with the second conductive contact this moment, make the upside of straining the body can not continue to move upwards, turn to the deformation of left and right sides bigger, the strain body is in the direction that first conductive contact and second conductive contact contacted elasticity deformation diminish, thereby the strain body is more easily in the complete reply of this direction, even take place the position between this first conductive contact of deformation and the second conductive contact of a plurality of times and not receive the influence, improve its repetition accuracy.
Further, in a preferred embodiment, the strain body 1 is spherical. The spherical strain body is uniformly stressed when being pressed, the strain is uniform, and the phenomena of cracking, breakage and the like are not easy to occur.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (1)
1. An evacuation prevention device comprising a control circuit, characterized in that: the electric power transformer further comprises a strain body (1), a first conductive contact piece (2) and a second conductive contact piece (3), wherein the strain body (1) is made of an elastic material, so that when the pressure intensity in the strain body (1) is reduced, the volume of the strain body (1) is reduced; the strain body (1) is arranged in a hollow mode, and the strain body (1) is provided with an air inlet (12) and an air extraction opening (11); the first conductive contact (2) and the second conductive contact (3) are fixed on the strain body (1); when the pressure in the strain body (1) is reduced, the contact state between the first conductive contact piece (2) and the second conductive contact piece (3) is changed from mutual separation to mutual abutting; the first conductive contact (2) and the second conductive contact (3) are connected with a control circuit; the first conductive contact piece (2) is fixed on the left side of the strain body (1), the right side of the first conductive contact piece (2) is provided with a bending section I, the second conductive contact piece (3) is fixed on the right side of the strain body (1), and the left side of the second conductive contact piece (3) is provided with a bending section II so as to increase the contact area of the first conductive contact piece (2) and the second conductive contact piece (3); the air suction opening (11) is also provided with a one-way valve, and the one-way valve enables air flow to flow out of the strain body (1) only from the inner side of the strain body (1); the strain body (1) is spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654444.5A CN108626104B (en) | 2018-06-22 | 2018-06-22 | Evacuating-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654444.5A CN108626104B (en) | 2018-06-22 | 2018-06-22 | Evacuating-proof device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108626104A CN108626104A (en) | 2018-10-09 |
| CN108626104B true CN108626104B (en) | 2024-04-30 |
Family
ID=63692146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810654444.5A Active CN108626104B (en) | 2018-06-22 | 2018-06-22 | Evacuating-proof device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108626104B (en) |
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| CN108626104A (en) | 2018-10-09 |
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