Easily-disassembled electromagnetic valve for breathing machine

Abstract

The easily-disassembled electromagnetic valve comprises a valve seat for installing a movable iron core and end covers which are detachably connected to the two ends of the valve seat respectively and used for installing a static iron core, a control rod is connected between the two end covers, the end covers are connected to the control rod in a sliding mode respectively, and positioning ring protrusions are arranged on the sides, facing the valve seat, of the end covers. The valve seat is provided with an annular groove for clamping the positioning annular bulge; the control rod is provided with a mounting position and a dismounting position, and when the control rod moves from the mounting position to the dismounting position, the two end covers are driven to slide away from each other until the end covers are separated from the valve seat. The conditions that in the related technology, the efficiency of disassembling the electromagnetic valve is not high, and operation is tedious are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical device accessories, in particular to a detachable solenoid valve for a ventilator. Background Technique

[0002] The main function of the solenoid valve is to control the gas path for the gas to enter and exit the ventilator, so that the ventilator can provide appropriate respiratory support according to the breathing needs of the patient. The solenoid valve in the ventilator can change parameters such as air pressure and oxygen mixing ratio by controlling the on-off of the air flow, so as to achieve precise respiratory support.

[0003] The solenoid valve includes a valve seat for installing the valve core. An electromagnetic component is installed in the valve seat. The valve seat includes a cavity for the movable iron core to reciprocate. A cover is fixed at the orifice of the cavity by bolts, and a static iron core is installed in the cover. Among them, the movable iron core is a consumable part, and the user needs to replace the movable iron core after it is worn to a certain extent. When replacing the movable iron core, a screwdriver is needed to screw out the screws, then the covers at the two orifices are removed, and then the movable iron core is pushed out from one side orifice. There are defects in that there are many operation steps, and the replacement efficiency of the movable iron core needs to be improved. Content of the Utility Model

[0004] In order to improve the situation in the related art that the efficiency of disassembling the solenoid valve is not high and the operation is relatively cumbersome, this application provides a detachable solenoid valve for a ventilator to improve the disassembly efficiency of the solenoid valve and simplify the operation steps when replacing the movable iron core.

[0005] This application provides a detachable solenoid valve for a ventilator, adopting the following technical solutions:

[0006] A detachable solenoid valve for a ventilator includes a valve seat for installing a movable iron core, end caps respectively detachably connected to both ends of the valve seat and for installing a static iron core. A control rod is connected between the two end caps. The end caps are respectively slidably connected to the control rod. A positioning ring protrusion is provided on the side of the end cap facing the valve seat, and the valve seat is provided with an annular groove for the positioning ring protrusion to be snap-fitted.

[0007] The control rod has an installation position and a disassembly position. When the control rod moves from the installation position to the disassembly position, the control rod drives the two end caps to slide away from each other until the end caps are separated from the valve seat.

[0008] Optionally, a sealing ring is sleeved on the side wall of the positioning ring protrusion, and a shallow groove for the sealing ring to be snap-fitted is provided on the side wall of the annular groove.

[0009] Optionally, trapezoidal driving blocks are fixed to the sides of the two end caps away from each other. Chutes accommodating the trapezoidal driving blocks are respectively formed at both ends of the control rod. The trapezoidal driving blocks have inclined surfaces, and the chute walls abut against the inclined surfaces. When the control rod moves from the installation position to the disassembly position, the chute walls push the corresponding trapezoidal driving blocks to deflect away from the valve seat.

[0010] Optionally, the easily detachable solenoid valve further includes a first telescopic rod for connecting the control rod and the trapezoidal driving block. A kidney-shaped hole is formed in the side of the trapezoidal driving block away from the valve seat. One end of the first telescopic rod is fixed in the chute, and the other end of the first telescopic rod is slidably connected to the kidney-shaped hole. The telescopic direction of the first telescopic rod is parallel to the sliding direction of the trapezoidal driving block.

[0011] Optionally, a first compression spring is sleeved on the first telescopic rod. One end of the first compression spring abuts against the side wall of the chute away from the valve seat, and the other end of the first compression spring abuts against the bottom wall of the kidney-shaped hole.

[0012] Optionally, an elastic positioning block is arranged on the end face of the valve seat facing the control rod. A first limiting surface for the control rod to be clamped at the installation position is arranged on the upper edge of the elastic positioning block.

[0013] Optionally, an installation groove for installing the elastic positioning block is formed in the valve seat. A second telescopic rod is arranged on the side of the elastic positioning block facing the valve seat. Both ends of the second telescopic rod are respectively fixed to the bottom wall of the installation groove and the elastic positioning block. A second compression spring is further sleeved on the second telescopic rod. One end of the second compression spring abuts against the bottom wall of the installation groove, and the other end of the second compression spring abuts against the end face of the elastic positioning block facing the valve seat.

[0014] Optionally, a relief surface is arranged on the lower edge of the elastic positioning block.

[0015] Optionally, a clamping block is further arranged on the end face of the valve seat facing the control rod. A second limiting surface is arranged on the side of the clamping block facing the control rod. In the installation position, the control rod is clamped between the clamping block and the elastic positioning block, and the side wall of the control rod abuts against the first limiting surface and the second limiting surface respectively.

[0016] By adopting the above technical solution, when installing the end cover, the control rod is slid from the lower edge of the valve seat into the installation position, so that the positioning ring protrusion on the end cover aligns with the annular groove on the valve seat. Then, the end cover is pressed to make the positioning ring protrusion snap into the annular groove, and the installation is convenient and fast. When the user needs to replace the iron core, the control rod is slid from the installation position to the disassembly position. During this process, the control rod drives the end covers on both sides of the valve seat to move away from each other, and the positioning ring protrusion disengages from the annular groove. Then, the moving iron core in the valve seat can be taken out and replaced, which simplifies the disassembly steps of the solenoid valve. The user does not need to use tools to disassemble the screws and can complete the disassembly action with one hand, providing a more convenient and fast disassembly method for the user to replace the moving iron core. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will discuss the drawings required for use in the description of the embodiments or the prior art. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings.

[0018] Figure 1 is a structural schematic diagram of the easily disassembled solenoid valve.

[0019] Figure 2 is a structural schematic diagram when the control rod is in the disassembly position.

[0020] Figure 3 is an exploded view of the partial part between the control rod and the end cover.

[0021] Figure 4 is an exploded view between the end cover and the valve seat.

[0022] Figure 5 is Figure 4 an enlarged view of part A in

[0023] Figure 6 is an exploded view between the elastic positioning block and the valve seat.

[0024] Figure 7 is Figure 6 an enlarged view of part B in

[0025] In the figure: 1, valve seat; 2, end cover; 3, control rod; 4, positioning ring protrusion; 5, annular groove; 6, sealing ring; 7, shallow groove; 8, trapezoidal driving block; 9, sliding groove; 1, inclined surface; 11, first telescopic rod; 12, waist-shaped hole; 13, first compression spring; 14, elastic positioning block; 15, first limiting surface; 16, installation groove; 17, second telescopic rod; 18, second compression spring; 19, relief surface; 20, clamping block; 21, second limiting surface; 22, third limiting surface. Detailed implementation mode

[0026] The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope protected by the present utility model.

[0027] An embodiment of the present utility model provides a detachable solenoid valve for a ventilator, as Figures 1 to 7 shown, including a valve seat 1 for installing a moving iron core, end caps 2 respectively detachably connected to both ends of the valve seat 1 and for installing a static iron core, a control rod 3 is connected between the two end caps 2, the end caps 2 are respectively slidably connected to the control rod 3, a positioning ring convex 4 is arranged on the side of the end cap 2 facing the valve seat 1, and the valve seat 1 is provided with an annular groove 5 for the positioning ring convex 4 to be clamped;

[0028] The control rod 3 has an installation position and a disassembly position. When the control rod 3 moves from the installation position to the disassembly position, the control rod 3 drives the two end caps 2 to slide away from each other until the end caps 2 are separated from the valve seat 1.

[0029] Specifically, in this embodiment, in the installation position, the control rod 3 is located at the upper edge of the valve seat 1, and at this time, the positioning ring convex 4 on the end cap 2 is coaxial with the annular groove 5 on the valve seat 1, so that the user does not need to repeatedly adjust the position of the end cap 2 relative to the valve seat 1, and the positioning is convenient and fast. When the control rod 3 moves from the installation position towards the disassembly position, the end cap 2 horizontally offsets and moves away from the valve seat 1 under the drive of the control rod 3. When the control rod 3 reaches the disassembly position, the positioning ring convex 4 has completely disengaged from the annular groove 5, and the disassembly process is completed in one step, improving the disassembly efficiency between the end cap 2 and the valve seat 1.

[0030] Among them, the valve seat 1 has a cavity for the moving iron core to reciprocate, and the cavity has openings at both ends of the valve seat 1, then the end cap 2 faces the opening. When the end cap 2 is installed on the valve seat 1, the opening communicates with the end cap 2.

[0031] In a preferred embodiment of the present utility model, a sealing ring 6 is sleeved on the side wall of the positioning ring convex 4, and a shallow groove 7 for the sealing ring 6 to be clamped is opened on the side wall of the annular groove 5.

[0032] Specifically, in this embodiment, when installing the end cap 2, the user needs to press the end cap 2 towards the valve seat 1 with force, so that the sealing ring 6 on the positioning ring convex 4 is clamped in the shallow groove 7. At this time, the sealing ring 6 abuts against the groove wall of the shallow groove 7 to ensure the sealing performance.

[0033] In a preferred embodiment of the present utility model, trapezoidal driving blocks 8 are fixed on the sides of the two end covers 2 away from each other. Slots 9 for accommodating the trapezoidal driving blocks 8 are respectively formed at both ends of the control rod 3. The trapezoidal driving blocks 8 have inclined surfaces 10, and the slot walls of the slots 9 abut against the inclined surfaces 10. When the control rod 3 moves from the installation position to the disassembly position, the slot walls push the corresponding trapezoidal driving blocks 8 to deflect away from the valve seat 1.

[0034] Specifically, in this embodiment, during the process of disassembling the end cover 2, the trapezoidal driving blocks 8 slide horizontally relative to the valve seat 1, and the control rod 3 slides downward relative to the trapezoidal driving blocks 8. During the sliding process of the control rod 3, since the distance between the two trapezoidal driving blocks 8 on both sides gradually shortens, and the length of the control rod 3 is constant, the control rod 3 pushes the trapezoidal driving blocks 8 away from each other through the slot walls of the slots 9, thereby achieving the purpose of simultaneously removing the end cover 2 from the valve seat 1 and improving the disassembly efficiency.

[0035] In a preferred embodiment of the present utility model, the easily detachable solenoid valve further includes a first telescopic rod 11 for connecting the control rod 3 and the trapezoidal driving blocks 8. A waist-shaped hole 12 is formed on the side of the trapezoidal driving block 8 away from the valve seat 1. One end of the first telescopic rod 11 is fixed in the slot 9, and the other end of the first telescopic rod 11 is slidably connected to the waist-shaped hole 12. The telescopic direction of the first telescopic rod 11 is parallel to the sliding direction of the trapezoidal driving block 8.

[0036] Specifically, in this embodiment, the first telescopic rod 11 serves to connect the control rod 3 and the corresponding end cover 2, preventing the control rod 3 from detaching from the end cover 2 during actual use. When the control rod 3 moves from the installation position to the disassembly position, the first telescopic rod 11 shortens accordingly; when the control rod 3 moves from the disassembly position to the installation position, the first telescopic rod 11 elongates accordingly.

[0037] In a preferred embodiment of the present utility model, a first compression spring 13 is sleeved on the first telescopic rod 11. One end of the first compression spring 13 abuts against the side wall of the slot 9 away from the valve seat 1, and the other end of the first compression spring 13 abuts against the bottom wall of the waist-shaped hole 12.

[0038] Specifically, in this embodiment, when the control rod 3 is in the installation position, the first compression spring 13 is in a compressed state. The first compression spring 13 applies a force to the side wall of the slot 9 away from the trapezoidal driving block 8, causing the slot wall in contact with the trapezoidal driving block 8 to tightly abut against the inclined surface 10 of the trapezoidal driving block 8, so as to ensure that the slot wall can push the trapezoidal driving block 8 to translate during the subsequent process of the user disassembling the solenoid valve.

[0039] In a preferred embodiment of the present utility model, an elastic positioning block 14 is provided on the end face of the valve seat 1 facing the control rod 3, and a first limiting surface 15 for the control rod 3 to be snap-fitted in the installation position is provided on the upper edge of the elastic positioning block 14.

[0040] Specifically, in this embodiment, the end face of the end cover 2 facing the control rod 3 is provided with an elastic positioning block 14 which has a positioning function. When the control rod 3 is in the installation position, the elastic positioning block 14 is supported below the control rod 3, preventing the user from accidentally touching and pulling down the control rod 3, which may cause the connection between the end cover 2 and the valve seat 1 to be unstable. When the user needs to disassemble the end cover 2, pressing the elastic positioning block 14 can pull down the control rod 3, and the unlocking method is simple and convenient.

[0041] In a preferred embodiment of the present utility model, the valve seat 1 is provided with an installation groove 16 for installing the elastic positioning block 14. A second telescopic rod 17 is arranged on one side of the elastic positioning block 14 facing the valve seat 1. Both ends of the second telescopic rod 17 are respectively fixed to the bottom wall of the installation groove 16 and the elastic positioning block 14. A second compression spring 18 is also sleeved on the second telescopic rod 17. One end of the second compression spring 18 abuts against the bottom wall of the installation groove 16, and the other end of the second compression spring 18 abuts against the end face of the elastic positioning block 14 facing the valve seat 1.

[0042] In a preferred embodiment of the present utility model, a relief surface 19 is arranged at the lower edge of the elastic positioning block 14.

[0043] Specifically, in this embodiment, when the second compression spring 18 is in a natural state, the surface of the elastic positioning block 14 protrudes from the installation groove 16. When the user needs to position the end cover 2 at both ends of the valve seat 1, the control rod 3 slides upward from the lower edge of the valve seat 1. The surface of the control rod 3 first contacts the relief surface 19, and during the upward sliding process of the control rod 3, the elastic positioning block 14 is pushed back into the installation groove 16. At this time, the second compression spring 18 deforms under force. After the control rod 3 moves to the installation position, the second compression spring 18 returns and drives the elastic positioning block 14 to reset, so that the first limiting surface 15 abuts against the lower edge of the control rod 3.

[0044] In a preferred embodiment of the present utility model, a clamping block 20 is further arranged on the end face of the valve seat 1 facing the control rod 3. A second limiting surface 21 is arranged on one side of the clamping block 20 facing the control rod 3. Under the installation position, the control rod 3 is clamped between the clamping block 20 and the elastic positioning block 14, and the side wall of the control rod 3 abuts against the first limiting surface 15 and the second limiting surface 21 respectively.

[0045] Specifically, in this embodiment, when the control rod 3 moves from the lower edge of the valve seat 1 to below the clamping block 20 and the upper edge of the control rod 3 abuts against the second limiting surface 21, it means that the control rod 3 reaches the installation position. At this time, the positioning ring protrusion 4 on the end cover 2 aligns with the annular groove 5 on the valve seat 1, making the installation process more convenient.

[0046] The end face of the control rod 3 facing the valve seat 1 further has a third limiting face 22, and the third limiting face 22 is a flat surface. The surface of the trapezoidal driving block 8 away from the end face is in contact with the third limiting face 22 to prevent the control rod 3 from rotating circumferentially due to accidental contact in the installation position.

[0047] In summary, when installing the end cover 2, slide the control rod 3 from the lower edge of the valve seat 1 into the installation position, align the positioning ring protrusion 4 on the end cover 2 with the annular groove 5 on the valve seat 1, and then press the end cover 2 to make the positioning ring protrusion 4 snap into the annular groove 5. The installation is convenient and fast. When the user needs to replace the iron core, slide the control rod 3 from the installation position to the disassembly position. During this process, the control rod 3 drives the end covers 2 on both sides of the valve seat 1 to move away from each other, and the positioning ring protrusion 4 disengages from the annular groove 5. Then, the moving iron core in the valve seat 1 can be taken out and replaced, simplifying the disassembly steps of the solenoid valve. The user does not need to use tools to disassemble the screws and can complete the disassembly action with one hand, providing a more convenient and fast disassembly method for the user to replace the moving iron core.

Claims

1. An easily detachable solenoid valve for a ventilator, characterized in that: It includes a valve seat (1) for installing a moving iron core, end covers (2) respectively detachably connected to both ends of the valve seat (1) and for installing a static iron core, a control rod (3) is connected between the two end covers (2), the end covers (2) are respectively slidably connected to the control rod (3), a positioning ring protrusion (4) is arranged on one side of the end cover (2) facing the valve seat (1), and an annular groove (5) for clamping the positioning ring protrusion (4) is formed in the valve seat (1); The control rod (3) has an installation position and a disassembly position. When the control rod (3) moves from the installation position to the disassembly position, the control rod (3) drives the two end covers (2) to slide away from each other until the end covers (2) are separated from the valve seat (1).

2. The detachable solenoid valve according to claim 1, characterized in that: A sealing ring (6) is sleeved on the side wall of the positioning ring protrusion (4), and a shallow groove (7) for clamping the sealing ring (6) is formed in the side wall of the annular groove (5).

3. The detachable solenoid valve according to claim 2, characterized in that: Trapezoidal driving blocks (8) are fixed on the sides of the two end covers (2) away from each other. Chutes (9) for accommodating the trapezoidal driving blocks (8) are respectively formed at both ends of the control rod (3). The trapezoidal driving blocks (8) have inclined surfaces (10). The wall of the chute (9) abuts against the inclined surface (10). When the control rod (3) moves from the installation position to the disassembly position, the wall of the chute pushes the corresponding trapezoidal driving block (8) to deflect in a direction away from the valve seat (1).

4. The detachable solenoid valve according to claim 3, wherein: The easily detachable solenoid valve further includes a first telescopic rod (11) for connecting the control rod (3) and the trapezoidal driving block (8). A kidney-shaped hole (12) is formed on the side of the trapezoidal driving block (8) away from the valve seat (1). One end of the first telescopic rod (11) is fixed in the chute (9), and the other end of the first telescopic rod (11) is slidably connected to the kidney-shaped hole (12). The telescopic direction of the first telescopic rod (11) is parallel to the sliding direction of the trapezoidal driving block (8).

5. The detachable solenoid valve according to claim 4, wherein: A first compression spring (13) is sleeved on the first telescopic rod (11). One end of the first compression spring (13) abuts against the side wall of the chute (9) away from the valve seat (1), and the other end of the first compression spring (13) abuts against the bottom wall of the kidney-shaped hole (12).

6. The detachable solenoid valve according to claim 5, characterized in that: An elastic positioning block (14) is arranged on the end face of the valve seat (1) facing the control rod (3), and a first limiting surface (15) for clamping the control rod (3) at the installation position is arranged on the upper edge of the elastic positioning block (14).

7. The detachable solenoid valve according to claim 6, wherein: The valve seat (1) is provided with an installation groove (16) for installing the elastic positioning block (14). On one side of the elastic positioning block (14) facing the valve seat (1), a second telescopic rod (17) is arranged. The two ends of the second telescopic rod (17) are respectively fixed to the bottom wall of the installation groove (16) and the elastic positioning block (14). A second compression spring (18) is also sleeved on the second telescopic rod (17). One end of the second compression spring (18) abuts against the bottom wall of the installation groove (16), and the other end of the second compression spring (18) abuts against the end face of the elastic positioning block (14) facing the valve seat (1).

8. The detachable solenoid valve according to claim 7, wherein: A relief surface (19) is arranged at the lower edge of the elastic positioning block (14).

9. The detachable solenoid valve according to claim 8, wherein: A clamping block (20) is further arranged on the end face of the valve seat (1) facing the control rod (3). A second limiting surface (21) is arranged on one side of the clamping block (20) facing the control rod (3). In the installation position, the control rod (3) is clamped between the clamping block (20) and the elastic positioning block (14), and the side wall of the control rod (3) abuts against the first limiting surface (15) and the second limiting surface (21) respectively.

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