CN112228588A

CN112228588A - Electromagnetic valve for preventing metal pollution for medical equipment

Info

Publication number: CN112228588A
Application number: CN202011173915.4A
Authority: CN
Inventors: 陈志法
Original assignee: Ningbo Anlite Machinery Co ltd
Current assignee: Ningbo Anlite Machinery Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-01-15
Anticipated expiration: 2040-10-28
Also published as: CN112228588B

Abstract

The invention belongs to the technical field of electromagnetic valves, and particularly relates to a metal pollution blocking electromagnetic valve for medical equipment, which comprises a valve body and a pilot head arranged on the valve body, wherein a valve cavity is arranged inside the valve body, a valve head protruding inwards is arranged on the inner side wall of the valve body, an air inlet and an air outlet which penetrate through the valve cavity are formed in the valve body, a first valve passage which penetrates through the air inlet, the air outlet and the valve cavity is formed in the valve head, a diaphragm which is used for blocking the first valve passage is arranged between the pilot head and the valve head, and the middle part of the diaphragm is fixedly connected with the pilot head; the diaphragm capable of separating the valve cavity is arranged between the guide head and the valve head, the edge of the diaphragm is fixed with the valve body through the pressing of the magnetism isolating pipe, the movable area of the movable iron core is separated from the area of the valve cavity for guiding air, and impurities generated by the movement of the movable iron core cannot enter the gas along with the gas, so that the gas is prevented from being polluted.

Description

Electromagnetic valve for preventing metal pollution for medical equipment

Technical Field

The invention belongs to the technical field of electromagnetic valves, and particularly relates to a metal pollution blocking electromagnetic valve for medical equipment.

Background

The solenoid valve is one of common pneumatic elements, is widely applied in various industries and is well known by people, the solenoid valve has various types and different structures, such as a two-position two-way solenoid valve, a two-position three-way solenoid valve, a two-position five-way solenoid valve and the like, and the basic principle of the solenoid valve is that an electromagnetic attraction force generated by electrifying an electromagnetic coil of a pilot head is utilized to attract a movable iron core to move, so that the effect of controlling the on-off or switching of an air path is achieved.

The two-position two-way electromagnetic valve is generally used in medical equipment, and comprises a valve body and a pilot head, wherein a valve cavity is formed in the valve body, the valve body is respectively provided with an air inlet, an air outlet and a valve port, the air inlet is communicated with the valve cavity through the valve port, the air outlet is directly communicated with the valve cavity, the pilot head comprises a magnetism isolating pipe, a movable iron core, a static iron core and a coil assembly, the bottom of the magnetism isolating pipe is fixedly connected with the valve body, the static iron core is fixedly arranged in the magnetism isolating pipe, the movable iron core is movably arranged in the magnetism isolating pipe, the lower end of the movable iron core extends into the valve cavity and is in sealing fit with the valve port, a movable iron core spring is arranged between the lower end of the movable iron core and the magnetism isolating pipe in a supporting manner.

The two-position two-way electromagnetic valve used for medical equipment at present has the defects that: because the movable iron core directly acts on the valve port, when the movable iron core frequently moves, metal scraps are easily generated due to abrasion, in addition, in order to reduce the friction resistance of the magnetism isolating pipe when the movable iron core moves, lubricating oil is usually required to be coated on the outer wall of the movable iron core during installation, and the above reasons are integrated, so that metal and other pollutants are easily generated in the valve cavity, the pollution phenomenon to medical gas is caused, and the health of a patient is damaged.

Disclosure of Invention

The invention provides a metal pollution prevention electromagnetic valve for medical equipment, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a medical equipment is with hindering metal contamination solenoid valve, includes the valve body and installs the pilot head on the valve body, the inside of valve body has the valve pocket, be equipped with the convex valve head to the inboard on the inside wall of valve body, set up the air inlet and the gas outlet that link up the valve pocket on the valve body, set up the first valve way that link up air inlet, gas outlet and valve pocket on the valve head, be equipped with the diaphragm that is used for the first valve way of shutoff between pilot head and the valve head, the middle part of diaphragm with pilot head fixed connection, just the edge of diaphragm is sealed to be fixed in the inner wall of valve body, so that the diaphragm will pilot head and valve pocket are separated.

Preferably, the guide head includes coil pack, magnetic isolation pipe, quiet iron core, moves iron core and spring, the magnetic isolation pipe spiro union is installed on the valve body, the coil pack cover is established the outside of magnetic isolation pipe, quiet iron core fixed mounting be in coil pack's top, move iron core movable mounting be in the inside of magnetic isolation pipe, the spring block install in move between iron core, the magnetic isolation pipe, so that move iron core and magnetic isolation pipe elastic connection, coil pack and external power source electric connection.

Preferably, the diaphragm includes connector, joint head and shutoff head, the top of connector has set firmly the joint head, the joint head snap-fit install move the tip of iron core, the bottom of connector sets firmly the shutoff head that is used for shutoff first valve way.

Preferably, the periphery of the connecting body extends outwards to form a telescopic part, a pressing part is arranged at the outer edge of the telescopic part, the connecting body, the pressing part and the telescopic part are integrally formed, and the pressing part is sealed inside the valve body through the magnetism isolating pipe in a compression joint mode.

Preferably, the diaphragm is the silica gel material, the valve body is the tetrafluoroethylene material.

Preferably, the top of valve head with the cooperation department of shutoff head is equipped with a plurality of commentaries on classics rollers, and is a plurality of it is central symmetry distribution to change the roller and be in the edge department in the top of valve head, change the roller with the valve head rotates and is connected.

Preferably, a second valve channel is formed in the position, corresponding to each rotary roller, of the valve head in the horizontal direction, and vent holes used for communicating the first valve channel and the second valve channel are formed in the rotary rollers.

Preferably, a limiting mechanism is arranged between the rotary roller and the valve head, so that the relative rotation angle between the rotary roller and the valve head is 0-90 degrees.

Preferably, the end part of the blocking head is provided with an arc surface matched with the rotating roller, so that when the blocking head and the valve head are pressed in a sealing state, the rotating roller and the second valve channel are sealed, when the blocking head is separated from the valve head, the rotating roller rotates ninety degrees, and the vent hole is communicated with the second valve channel.

Preferably, the bottom of the connector is fixedly provided with a group pleat sealing ring, the group pleat sealing ring is positioned on the outer side of the blocking head, when the blocking head and the valve head are pressed and pressed in a sealing state, the bottom of the group pleat sealing ring is in press-contact sealing with the valve head, and the joint of the group pleat sealing ring and the connector is provided with an elastic contraction part so that the group pleat sealing ring is elastically contracted.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the diaphragm capable of separating the valve cavity is arranged between the guide head and the valve head, wherein the edge of the diaphragm is fixed with the valve body through the pressing of the magnetism isolating pipe, so that the movable region of the movable iron core is separated from the region of the valve cavity for guiding gas, and impurities generated by the movement of the movable iron core cannot enter the gas along with the gas, so that the gas is prevented from being polluted.

According to the invention, the plurality of rotating rollers matched with the plugging heads are arranged at the top of the valve head, when the plugging heads move up and down, the rotating rollers roll and rub, so that the plugging heads are more easily separated from and inserted into the valve head, the phenomenon of adhesion between the plugging heads and the valve head in a high-temperature or cold environment can be avoided, the valve head and the rotating rollers are respectively provided with the second valve channel and the vent hole which are matched with each other, when the valve is opened, the vent hole is connected and communicated with the second valve channel, and gas can be led out from the second valve channel on the side to offset the difference between the internal pressure and the external pressure, so that the valve is convenient to open.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a diaphragm and a valve head according to the present invention;

FIG. 3 is a schematic structural view showing the first and second valve passages being closed according to the present invention;

FIG. 4 is a schematic structural view of the present invention with the first valve passage closed and the second valve passage open;

fig. 5 is a schematic top view of the valve head according to the present invention.

In the figure: 1. a valve body; 101. an air inlet; 102. an air outlet; 103. a valve cavity; 2. a valve head; 201. a first valve passage; 202. a second valve passage; 21. rotating the roller; 211. a vent hole; 3. a leading head; 31. a coil assembly; 32. a magnetism isolating pipe; 33. a stationary iron core; 34. a movable iron core; 35. a spring; 4. a membrane; 41. a linker; 42. a press-fit portion; 43. a telescopic part; 44. a clamping head; 45. plugging a plug; 46. a group of pleat sealing rings; 461. an elastic contraction portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides the following technical solutions: the utility model provides a medical equipment is with hindering metal contamination solenoid valve, include valve body 1 and install the leading head 3 on valve body 1, the inside of valve body 1 has valve chamber 103, be equipped with inboard convex valve head 2 on the inside wall of valve body 1, set up air inlet 101 and the gas outlet 102 that link up valve chamber 103 on the valve body 1, set up on the valve head 2 and link up air inlet 101, the first valve way 201 of gas outlet 102 and valve chamber 103, be equipped with the diaphragm 4 that is used for the first valve way 201 of shutoff between leading head 3 and the valve head 2, the middle part and the leading head 3 fixed connection of diaphragm 4, and the edge sealing of diaphragm 4 is fixed in the inner wall of valve body 1, so that diaphragm 4 separates leading head 3 and valve chamber 103.

In the embodiment, a diaphragm 4 capable of separating a valve cavity 103 is arranged between a guide head 3 and a valve head 2, wherein the edge of the diaphragm 4 is fixed with a valve body 1 through a magnetic isolation pipe 32 in a pressing manner, so that the movable region of a movable iron core 34 is separated from the region of the valve cavity 103 for guiding air, and impurities generated by the movement of the movable iron core 34 cannot enter the gas along with the gas, thereby preventing the gas from being polluted, a plurality of rotating rollers 21 matched with a blocking head 45 are arranged at the top of the valve head 2, and when the blocking head 45 moves up and down, the rotating rollers 21 roll and rub, so that the blocking head 45 is more easily separated from and inserted into the valve head 2, thereby avoiding the phenomenon of adhesion between the blocking head 45 and the valve head 2 in a high-temperature or cold environment, and the valve head 2 and the rotating rollers 21 are respectively provided with a second valve passage 202 and a vent hole 211 which are matched with each other, when the valve head 2 and the rotating rollers, the rotary roller 21 rotates downwards along with the rotary roller to rotate the vent hole 211 to enable the vent hole 211 to be separated from the second valve channel 202, the first valve channel 201 is blocked, meanwhile, the second valve channel 202 is also blocked, and therefore sealing performance in a blocking state is guaranteed.

Specifically, as shown in fig. 1, the pilot head 3 includes a coil assembly 31, a magnetism isolating pipe 32, a stationary iron core 33, a movable iron core 34 and a spring 35, the magnetism isolating pipe 32 is installed on the valve body 1 in a threaded manner, the coil assembly 31 is sleeved outside the magnetism isolating pipe 32, the stationary iron core 33 is fixedly installed at the top of the coil assembly 31, the movable iron core 34 is movably installed inside the magnetism isolating pipe 32, the spring 35 is installed between the movable iron core 34 and the magnetism isolating pipe 32 in a clamping manner so as to elastically connect the movable iron core 34 with the magnetism isolating pipe 32, the coil assembly 31 is electrically connected with an external power supply, when the pilot head is used, the coil assembly 31 is powered on or powered off to generate electromagnetic force to drive the movable iron core 34 inside the magnetism isolating pipe 32 to reciprocate, and the valve is opened and closed.

Specifically, as shown in fig. 2, the diaphragm 4 includes a connector 41, a snap joint 44 and a plugging head 45, the top of the connector 41 is fixedly provided with the snap joint 44, the snap joint 44 is mounted at an end of the movable iron core 34 in a snap-fit manner, the bottom of the connector 41 is fixedly provided with the plugging head 45 for plugging the first valve passage 201, the peripheral side of the connector 41 extends outwards to form a telescopic portion 43, the outer edge of the telescopic portion 43 is provided with the press-fit portion 42, the connector 41, the press-fit portion 42 and the telescopic portion 43 are integrally formed, the press-fit portion 42 is sealed inside the valve body 1 through the magnetic isolation tube 32 in a press-fit manner, the snap joint 44 is used for being connected with the movable iron core 34, stability of the snap-fit is ensured, the movable iron core 34 can drive the plugging head 45 to move and cooperate with the valve head 2, the valve cavity 103 can be separated by the arrangement.

Specifically, diaphragm 4 is the silica gel material, and the diaphragm 4 of silica gel material has elasticity, and nontoxic safety, is applicable to medical instrument, and valve body 1 is the tetrafluoroethylene material, can stop the risk of metal contamination to a certain extent.

Specifically, as shown in fig. 3-5, a plurality of rollers 21 are disposed at a matching position between the top of the valve head 2 and the plugging head 45, the plurality of rollers 21 are distributed at an inner edge of the top of the valve head 2 in a central symmetry manner, the rollers 21 are rotatably connected with the valve head 2, a second valve passage 202 is disposed on the valve head 2 along a horizontal direction corresponding to each roller 21, the rollers 21 are provided with vent holes 211 for communicating the first valve passage 201 with the second valve passage 202, a limiting mechanism is disposed between the rollers 21 and the valve head 2, so that a relative rotation angle between the rollers 21 and the valve head 2 is 0 to 90 degrees, an end of the plugging head 45 is provided with an arc surface matching with the rollers 21, so that when the plugging head 45 and the valve head 2 are in a press-fit sealed state, the rollers 21 and the second valve passage 202 are sealed, when the plugging head 45 is separated from the valve head 2, the rollers 21 rotate ninety degrees, the vent holes 211 and the second valve passage 202 are communicated with each other, when the plugging head 45 moves up and down, the rolling friction with the roller 21 is realized, so that the plugging head 45 is more easily separated and inserted into the valve head 2, can avoid the adhesion phenomenon between the plugging head 45 and the valve head 2 in high temperature or cold environment, the valve head 2 and the roller 21 are respectively provided with a second valve passage 202 and a vent hole 211 which are matched with each other, when the valve needs to be closed, the blocking head 45 moves downwards, the roller 21 rotates downwards along with the downward movement, the vent hole 211 is rotated to be separated from the second valve passage 202, the first valve passage 201 is closed and the second valve passage 202 is also closed, so that the sealing performance in the closed state is ensured, and when the valve needs to be opened, the blocking head 45 moves upwards, the rotating roller 21 rotates upwards, the vent hole 211 is connected and communicated with the second valve channel 202 again, and gas is led out from the second valve channel 202 on the side edge at first to offset the difference between the internal pressure and the external pressure, so that the valve is opened conveniently.

Specifically, as shown in fig. 3 to 4, a group pleat sealing ring 46 is fixedly arranged at the bottom of the connecting body 41, the group pleat sealing ring 46 is located at the outer side of the sealing head 45, when the sealing head 45 is in a sealed state with the valve head 2 in a pressed manner, the bottom of the group pleat sealing ring 46 is in a press-contact seal with the valve head 2, an elastic contraction portion 461 is arranged at the joint of the group pleat sealing ring 46 and the connecting body 41, so that the group pleat sealing ring 46 elastically contracts, and the group pleat sealing ring 46 is arranged at the outer side of the sealing head 45, so that the group pleat sealing ring 46 can be matched with the valve head 2 to complete the sealing operation, thereby preventing the poor sealing performance caused by the air leakage between the rotating roller 21 and the valve head 2.

The working principle and the using process of the invention are as follows: when the valve is used, the coil assembly 31 is powered on or powered off to generate electromagnetic force to drive the movable iron core 34 inside the magnetism isolating pipe 32 to reciprocate, so that the valve is opened and closed, when the blocking head 45 moves up and down, the blocking head 45 is in rolling friction with the rotary roller 21, the blocking head 45 is more easily separated from and inserted into the valve head 2, the phenomenon of adhesion between the blocking head 45 and the valve head 2 in a high-temperature or cold environment can be avoided, the valve head 2 and the rotary roller 21 are respectively provided with a second valve passage 202 and a vent hole 211 which are matched with each other, when the valve needs to be closed, the blocking head 45 moves downwards, the rotary roller 21 rotates downwards to separate the vent hole 211 from the second valve passage 202, the first valve passage 201 is blocked, the second valve passage 202 is also blocked, so that the sealing performance in a blocking state is ensured, when the valve needs to be opened, the blocking head 45 moves upwards, and the rotary roller 21 rotates upwards, the vent hole 211 is connected and communicated with the second valve passage 202 again, and at the same time, gas is led out from the second valve passage 202 on the side to counteract the difference between the internal pressure and the external pressure, so that the valve is opened conveniently.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a medical equipment is with hindering metal contamination solenoid valve, includes valve body (1) and installs guide head (3) on valve body (1), its characterized in that: the valve comprises a valve body (1), a valve cavity (103) is arranged inside the valve body (1), a valve head (2) protruding towards the inner side is arranged on the inner side wall of the valve body (1), an air inlet (101) and an air outlet (102) which penetrate through the valve cavity (103) are formed in the valve body (1), a first valve passage (201) which penetrates through the air inlet (101), the air outlet (102) and the valve cavity (103) is formed in the valve head (2), a membrane (4) used for plugging the first valve passage (201) is arranged between the pilot head (3) and the valve head (2), the middle of the membrane (4) is fixedly connected with the pilot head (3), and the edge of the membrane (4) is hermetically fixed on the inner wall of the valve body (1), so that the membrane (4) separates the pilot head (3) from the valve cavity (103).

2. The solenoid valve for blocking metal contamination for medical equipment according to claim 1, characterized in that: leading head (3) include coil pack (31), magnetic tube (32), quiet iron core (33), move iron core (34) and spring (35), magnetic tube (32) spiro union is installed on valve body (1), coil pack (31) cover is established the outside of magnetic tube (32), quiet iron core (33) fixed mounting be in the top of coil pack (31), move iron core (34) movable mounting be in the inside of magnetic tube (32), spring (35) block install in move between iron core (34), magnetic tube (32), so that move iron core (34) and magnetic tube (32) elastic connection, coil pack (31) and external power source electric connection.

3. The solenoid valve for blocking metal contamination for medical equipment according to claim 2, characterized in that: the diaphragm (4) includes connector (41), joint (44) and shutoff head (45), the top of connector (41) has set firmly joint (44), joint (44) block is installed the tip of movable core (34), the bottom of connector (41) has set firmly shutoff head (45) that are used for shutoff first valve way (201).

4. The solenoid valve for blocking metal contamination for medical equipment according to claim 3, characterized in that: the week side of connector (41) outwards extends and is equipped with pars contractilis (43), the outer fringe department of pars contractilis (43) is equipped with nip portion (42), connector (41), nip portion (42), pars contractilis (43) integrated into one piece, nip portion (42) pass through magnetism proof pipe (32) crimping is sealed the inside of valve body (1).

5. The solenoid valve for blocking metal contamination for medical equipment according to claim 4, characterized in that: the diaphragm (4) is made of silica gel, and the valve body (1) is made of tetrafluoroethylene.

6. The solenoid valve for blocking metal contamination for medical equipment according to claim 3, characterized in that: the top of valve head (2) with the cooperation department of shutoff head (45) is equipped with a plurality of roller (21), and is a plurality of it is in to change roller (21) be central symmetry distribution the top inner edge department of valve head (2), change roller (21) with valve head (2) rotate and are connected.

7. The solenoid valve for blocking metal contamination for medical equipment according to claim 6, characterized in that: the valve head (2) is provided with a second valve channel (202) corresponding to each rotating roller (21) along the horizontal direction, and the rotating rollers (21) are provided with vent holes (211) for communicating the first valve channel (201) and the second valve channel (202).

8. The solenoid valve for blocking metal contamination for medical equipment according to claim 7, characterized in that: a limiting mechanism is arranged between the rotating roller (21) and the valve head (2) so that the relative rotation angle between the rotating roller (21) and the valve head (2) is 0-90 degrees.

9. The solenoid valve for blocking metal contamination for medical equipment according to claim 8, characterized in that: the end part of the blocking head (45) is provided with an arc surface matched with the rotating roller (21), so that when the blocking head (45) and the valve head (2) are pressed in a sealing state, the rotating roller (21) and the second valve channel (202) are sealed, when the blocking head (45) is separated from the valve head (2), the rotating roller (21) rotates ninety degrees, and the vent hole (211) and the second valve channel (202) are communicated with each other.

10. The solenoid valve for blocking metal contamination for medical equipment according to claim 9, characterized in that: the bottom of connector (41) sets firmly crowd's pleat sealing washer (46), crowd's pleat sealing washer (46) are located the outside of shutoff head (45), when shutoff head (45) and valve head (2) pressfitting are in encapsulated situation, the bottom of crowd's pleat sealing washer (46) with valve head (2) pressure touches sealedly, the junction of crowd's pleat sealing washer (46) and connector (41) has elasticity shrink portion (461), so that crowd's pleat sealing washer (46) elasticity shrink.