CN217067422U - Electromagnetic pinch valve capable of being powered off and normally closed - Google Patents
Electromagnetic pinch valve capable of being powered off and normally closed Download PDFInfo
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- CN217067422U CN217067422U CN202123374457.3U CN202123374457U CN217067422U CN 217067422 U CN217067422 U CN 217067422U CN 202123374457 U CN202123374457 U CN 202123374457U CN 217067422 U CN217067422 U CN 217067422U
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Abstract
The utility model discloses a normally closed electromagnetic pinch valve capable of cutting off power supply, which comprises a clamping shaft fixed on a clamping shaft seat, wherein a clamping head passes through the clamping shaft seat and is sleeved on the shaft seat; the chuck is fixed on the movable iron core, a coil is sleeved outside the movable iron core, and the coil is accommodated in the coil cylinder; a front cushion block is arranged at one end of the coil close to the chuck, and a first compression elastic piece is arranged between the front cushion block and the chuck; a rear cushion block is arranged at one end of the coil, which is far away from the chuck, and a permanent magnet is abutted behind the rear cushion block; an iron core seat is arranged behind the permanent magnet, an opening is formed in the iron core seat, a detection shaft is arranged in the opening, and a second compression elastic piece is sleeved outside the detection shaft; a detection switch and a control circuit board are arranged behind the detection shaft. The utility model relates to an electromagnetic pinch valve of this example, simple structure, small has the function that the outage kept, and in use need not be circular telegram always, and consequently the reliability that can not generate heat is high, has outage closed function, and the security is high.
Description
Technical Field
The utility model relates to an electromagnetism pinch valve, concretely relates to electromagnetism pinch valve of outage normal close.
Background
When a patient is treated by using blood purification equipment such as a hemodialysis machine, an immunoadsorption machine and the like, blood of the patient needs to be pumped into a pipeline, and the blood is re-infused into the patient after being purified. In case of abnormal conditions, blood leakage, bubbles and the like need to be monitored online all the time in the whole treatment process, a blood return pipeline needs to be cut off immediately, and air is prevented from entering a human body so as to ensure the safety of a patient. When the immunoadsorption device is used for treatment, plasma needs to be separated to purify the plasma, and the flow of liquid in a hose needs to be opened or cut off during the treatment process. The pinch valve is used for opening or cutting off the flow of liquid in the hose and controlling the direction of the liquid.
The existing pinch valve is mainly driven by electromagnetism, when the pinch valve is electrified, an electromagnetic coil attracts and closes an armature so that the armature drives a valve head, and the valve head can move towards the direction of the coil. When the power is off, the suction force of the electromagnetic coil disappears, and the valve head moves towards the coil in the opposite direction under the action of the spring. The back and forth movement of the valve head clamps or unclamps the hose. However, since the conventional pinch valve needs to be kept energized in an operating state. Particularly, when the device is used in an immunoadsorption device, the immunoadsorption device uses a large number of pinch valves, if the pinch valves need to be kept electrified, the current is overlarge, continuous electrification also causes the heating of the pinch valves, the temperature of the device is finally increased, and the reliability is reduced. The traditional pinch valve can generate larger noise when the on-off is switched.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome at least one not enough of prior art, provide a but electromagnetic pinch valve of outage normal close.
The utility model adopts the technical proposal that:
an electromagnetic pinch valve comprises a pinch shaft, wherein the pinch shaft is fixed on a pinch shaft seat, and a pinch head penetrates through the pinch shaft and is sleeved on the shaft seat;
the chuck is fixed on the movable iron core, a coil is sleeved outside the movable iron core, and the coil is accommodated in the coil cylinder;
a front cushion block is arranged at one end of the coil close to the chuck, and a first compression elastic piece is arranged between the front cushion block and the chuck;
a rear cushion block is arranged at one end of the coil, which is far away from the chuck, and a permanent magnet is abutted to the rear of the rear cushion block;
an iron core seat is arranged behind the permanent magnet, an opening is formed in the iron core seat, a detection shaft is arranged in the opening, a second compression elastic piece is sleeved outside the detection shaft, and the detection shaft can be pushed backwards by the movable iron core and forwards by the second compression elastic piece;
the detection shaft is used for controlling a detection switch connected behind the detection shaft, the detection switch is electrically connected with the control circuit board, and the control circuit board is provided with a driving capacitor used for reversely electrifying the coil.
In some examples, a bumper is disposed within the plunger.
In some examples, the buffer is a hydraulic buffer.
In some examples, the bobbin outer sleeve is provided with an outer sleeve.
In some examples, the first compression spring is a spring.
In some examples, the second compression spring is a spring.
In some examples, a rear cover is arranged outside the detection switch and the control circuit board.
In some examples, the opening of the clamp shaft is V-shaped.
In some examples, the rear cap is connected with the outer sleeve.
In some examples, the permanent magnet is a neodymium magnet.
The utility model has the advantages that:
the utility model relates to an electromagnetic pinch valve of this example, simple structure, small has the function that the outage kept, does not need in use to switch on always, and consequently the reliability that can not generate heat is high, has outage closed function, and the security is high.
The utility model discloses an electromagnetic pinch valve of this example, the opening of pressing from both sides the axle is the V-arrangement, can press from both sides tight hose better.
Drawings
FIG. 1 is a schematic structural view of some examples of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic perspective view of some examples of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other elements or indirectly connected through one or more other elements or in an interactive relationship between two elements.
The following disclosure provides many different embodiments or examples for implementing different aspects of the invention.
Referring to fig. 1 to 3, an electromagnetic pinch valve comprises a pinch shaft 2, wherein the pinch shaft 2 is fixed on a pinch shaft seat 1, and a pinch head 3 penetrates through the pinch shaft 2 and is sleeved on the shaft seat 1;
the chuck 3 is fixed on a movable iron core 6, a coil 8 is sleeved outside the movable iron core 6, and the coil 8 is accommodated in a coil cylinder 9;
one end of the coil 8, which is close to the chuck 3, is provided with a front cushion block 5, and a first compression elastic part 4 is arranged between the front cushion block 5 and the chuck 3;
a rear cushion block 11 is arranged at one end of the coil 8, which is far away from the chuck 3, and a permanent magnet 12 is abutted to the rear part of the rear cushion block 11;
an iron core seat 13 is arranged behind the permanent magnet 12, the iron core seat 13 is provided with an opening, a detection shaft 14 is arranged in the opening, a second compression elastic piece 15 is sleeved outside the detection shaft 14, and the detection shaft 14 can be pushed backwards by the movable iron core 6 and can be pushed forwards by the second compression elastic piece 15;
the detection shaft 14 is used for controlling a detection switch 16 connected behind the detection shaft, the detection switch 16 is electrically connected with a control circuit board 17, and a driving capacitor used for reversely electrifying the coil 8 is arranged on the control circuit board 17.
In some examples, a buffer 7 is provided within the moving core 6. Through setting up the buffer, can reduce the impact when moving the iron core, reduce the noise when pinch valve moves.
In some examples, the buffer 7 is a hydraulic buffer. Thus, the buffer noise reduction effect is better.
In some examples, the bobbin 9 is externally sleeved with an outer sleeve 10. The outer sleeve has a better protective effect.
In some examples, the first compression spring 4 is a spring. The structure is simple and reliable.
In some examples, the second compression spring 15 is a spring. The structure is simple and reliable.
In some examples, a rear cover 18 is provided outside the detection switch 16 and the control circuit board 17.
In some examples, the opening of the clamp shaft 2 is V-shaped, which more easily cuts off the flow of liquid.
In some examples, the rear cap 18 is connected with the outer sleeve 10.
In some examples, the permanent magnet 12 is a neodymium magnet. The magnetic force of the neodymium magnet is larger, so that the neodymium magnet is more favorable for ensuring that the power can be cut off during operation.
In one particular example of the use of the invention,
the clamping shaft 2 is fixed on the clamping shaft seat 1, the clamping head 3 penetrates through the clamping shaft 2 and is sleeved on the clamping shaft seat 1, and the movable iron core 6 and the clamping head 3 are fixed together;
the hydraulic buffer 7 is fixedly arranged in the movable iron core, the movable iron core 6 drives the chuck 3 to move, the movable iron core 6 is sleeved in the coil 8, the coil 8 is sleeved in the coil cylinder 9, the coil cylinder 9 is sleeved in the outer sleeve 10, the outer sleeve 10 is fixed with the chuck base 1, the front of the coil 8 is also provided with the front cushion block 5, the compressed large spring 4 is arranged between the front cushion block 5 and the chuck 3, the large spring 4 has certain pre-pressure, and the chuck is pushed out under the condition of power failure so that the chuck 2 clamps the hose. A rear cushion block 11 is arranged behind the coil 8, and a strong magnet 12 is arranged behind the rear cushion block 11;
an iron core seat 13 is arranged behind the strong magnet 12, a hole is formed in the iron core seat 13, a detection shaft 14 is arranged in the hole, a detection spring 15 is compressed between the detection shaft 14 and the iron core seat 13 to have certain pre-pressure, a detection switch 16 and a circuit control board 17 are arranged behind the iron core seat 13, a driving capacitor used for reversely electrifying the coil is arranged on the control circuit board 17, and the pre-pressure of the detection spring 15 ensures that the detection shaft 14 can be pushed back after the resisting pressure of the movable iron core 6 disappears so as to change the state of the detection switch 16;
a rear cover 18 is fitted over the outer sleeve 10 to conceal the detection switch 16 and the circuit control board 17.
The working principle of the electromagnetic pinch valve of the utility model is as follows:
when liquid in the hose needs to circulate, the circuit control board 17 energizes the coil 8, the coil 8 generates magnetic force, the movable iron core 6 overcomes the spring force of the large spring 4 and the detection spring 15 under the action of the magnetic force, the movable iron core 6 drives the chuck 3 to move backwards to touch the iron core seat 13 to stop moving, and at the moment, the detection shaft 14 is also pushed to extend backwards to enable the detection switch 16 to detect signals;
when the moving iron 6 touches the iron core seat 13 and is static, the iron core seat 13 is magnetized and has magnetism because the strong magnet 12 is arranged on the iron core seat 13, the moving iron core 6 is firmly attracted, and the coil 8 is powered off by the detection switch 16 under the action of the detection shaft 14 through the control circuit 17. Therefore, when the electromagnetic pinch valve works, the coil is not required to be electrified all the time, the current of the device is reduced, and the heat is reduced.
When the liquid in the hose needs to be cut off, the coil 8 is reversely electrified by the driving capacitor in the circuit control board 17, the coil 8 generates a reverse magnetic field, the movable iron core 13 overcomes the magnetic force of the iron core seat 13 to move forwards under the action of the reverse magnetic field force and the spring force of the large spring 4 and the detection spring 15, the detection shaft 14 leaves the detection switch 16 under the action of the spring force of the small spring 15, and the detection switch 16 loses signals. The movable iron core 6 drives the chuck 3 to move forwards, the chuck 3 extrudes the hose on the chuck shaft 2, and the flow of the liquid is cut off. Because the coil is reversely electrified and is driven by a capacitor on the circuit board, when the equipment is powered off accidentally, the clamping head of the pinch valve can extend out in time to clamp the hose, so that the normal close of the power-off is realized, and the safety is improved.
During the backward movement of the movable iron core 13, the hydraulic buffer 7 plays a role of buffering and reducing noise.
The above is a further detailed description of the present invention and should not be considered as limiting the practice of the present invention. To the ordinary skilled person in the technical field that the utility model belongs to, the simple deduction or the replacement that does not depart from the inventive concept is all within the scope of the utility model.
Claims (11)
1. An electromagnetism pinch valve, includes the clip axle, its characterized in that:
the clamping shaft is fixed on the shaft clamping seat, and the clamping head penetrates through the clamping shaft and is sleeved on the shaft seat;
the chuck is fixed on the movable iron core, a coil is sleeved outside the movable iron core, and the coil is accommodated in the coil cylinder;
a front cushion block is arranged at one end of the coil close to the chuck, and a first compression elastic piece is arranged between the front cushion block and the chuck;
a rear cushion block is arranged at one end of the coil, which is far away from the chuck, and a permanent magnet is abutted to the rear of the rear cushion block;
an iron core seat is arranged behind the permanent magnet, an opening is formed in the iron core seat, a detection shaft is arranged in the opening, a second compression elastic piece is sleeved outside the detection shaft, and the detection shaft can be pushed backwards by the movable iron core and forwards by the second compression elastic piece;
the detection shaft is used for controlling a detection switch connected behind the detection shaft, the detection switch is electrically connected with the control circuit board, and the control circuit board is provided with a driving capacitor used for reversely electrifying the coil.
2. The solenoid pinch valve of claim 1, wherein: and a buffer is arranged in the movable iron core.
3. The solenoid pinch valve of claim 2, wherein: the buffer is a hydraulic buffer.
4. The solenoid pinch valve of claim 1, wherein: an outer sleeve is sleeved outside the coil cylinder.
5. The solenoid pinch valve of claim 1, wherein: the first compression elastic member is a spring.
6. The electromagnetic pinch valve of any one of claims 1-5, wherein: the second compression elastic member is a spring.
7. The solenoid pinch valve of claim 1, wherein: and a rear cover is arranged outside the detection switch and the control circuit board.
8. The electromagnetic pinch valve of claim 4, wherein: and a rear cover is arranged outside the detection switch and the control circuit board.
9. The electromagnetic pinch valve of any one of claims 1-5, wherein: the opening of the clamping shaft is V-shaped.
10. The electromagnetic pinch valve of claim 8, wherein: the rear cap is connected with the outer sleeve.
11. The electromagnetic pinch valve of any one of claims 1-5, wherein: the permanent magnet is a neodymium magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374457.3U CN217067422U (en) | 2021-12-30 | 2021-12-30 | Electromagnetic pinch valve capable of being powered off and normally closed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374457.3U CN217067422U (en) | 2021-12-30 | 2021-12-30 | Electromagnetic pinch valve capable of being powered off and normally closed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217067422U true CN217067422U (en) | 2022-07-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123374457.3U Active CN217067422U (en) | 2021-12-30 | 2021-12-30 | Electromagnetic pinch valve capable of being powered off and normally closed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217067422U (en) |
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2021
- 2021-12-30 CN CN202123374457.3U patent/CN217067422U/en active Active
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