Automatic self-flow prevention valve

Abstract

The utility model discloses an automatic self-flow prevention valve, and relates to the field of medical instruments. The automatic self-flow prevention valve comprises a deformable valve body, a valve groove formed in the valve body and two side pressing blocks arranged on the inner walls of the two sides of the valve groove respectively, groove openings are formed in the two ends of the valve groove in the length direction respectively, and an infusion hose penetrates through the valve groove in the axial direction of the infusion hose and is contained between the two side pressing blocks. According to the automatic self-flow-preventing valve, in the conducting state, the side pressing blocks on the two sides only abut against the two sides of the infusion hose and do not apply extrusion force to the infusion hose, so that infusion liquid in the infusion hose can freely flow without any hindrance; and after the external force is removed, the valve body returns to the initial state under the action of the deformation force of the valve body, the initial state is the cut-off state, and in the cut-off state, the side pressing blocks on the two sides oppositely press the pipe walls on the two sides of the infusion hose, so that cut-off is automatically conducted on infusion liquid in the infusion hose, and the infusion liquid in the infusion hose is not blocked. And infusion liquid is prevented from flowing into the body of a patient under an uncontrolled condition.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an automatic anti-self-flow valve. Background Art

[0002] In clinical medicine, infusion equipment is widely used in intravenous infusion or enteral feeding, and the infusion flow is controlled by an infusion pump or other flow regulating device. In the conventional application of infusion equipment, it needs to be used with an anti-self-flow valve to prevent the infusion solution from flowing into the patient's body without the control of the infusion pump or other flow regulating device, thereby causing medical accidents.

[0003] The existing anti-self-flow valve needs to be manually operated to prevent the self-flow of the infusion solution. If the medical staff fails to operate it in time or operates it improperly, too much infusion solution will flow into the patient's body, which poses a great safety hazard. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the present application provides an automatic anti-self-flow valve.

[0005] The automatic anti-self-flow valve provided in this application adopts the following technical solution:

[0006] An automatic anti-self-flow valve, comprising a deformable valve body, a valve slot provided in the valve body, and two side pressure blocks respectively provided on the inner walls of both sides of the valve slot, wherein both ends of the valve slot in the length direction respectively have notches, and an infusion hose is axially passed through the valve slot and accommodated between the two side pressure blocks;

[0007] The automatic anti-self-flow valve has a conducting state and a shut-off state. When the automatic anti-self-flow valve is in the conducting state, the width of the valve groove is greater than its height, the two side pressure blocks are relatively far away, and the two side walls of the infusion hose are respectively in conflict with the two side pressure blocks; when the automatic anti-self-flow valve is in the shut-off state, the width of the valve groove is less than its height, the two side pressure blocks are relatively closed and press the two side walls of the infusion hose relatively.

[0008] By adopting the above technical scheme, when an external force is applied to the automatic anti-self-flow valve of the present application, the valve body will be deformed and enter a conducting state. In the conducting state, the side pressure blocks on both sides only abut against the two sides of the infusion hose without applying a squeezing force thereto, so that the infusion liquid in the infusion hose can flow freely without hindrance; and after the external force is removed, the valve body returns to the initial state under the action of its own deformation force, and the initial state is the interception state. In the interception state, the side pressure blocks on both sides press the two side walls of the infusion hose relative to each other, thereby automatically intercepting the infusion liquid in the infusion hose, and preventing the infusion liquid from flowing into the patient's body in an uncontrolled manner.

[0009] In a specific possible implementation scheme, the valve body includes an upper valve seat and a lower valve seat arranged up and down, the lower valve seat includes two side arms and a lower arm, the two side arms are respectively connected to both ends of the lower arm and are integrally formed with the lower arm;

[0010] When the automatic self-flow prevention valve is in a conducting state, the length of the side branch arm is smaller than the length of the lower branch arm; when the automatic self-flow prevention valve is in a shut-off state, the length of the side branch arm is larger than the length of the lower branch arm.

[0011] By adopting the above technical solution, in the conduction state, the longer lower arm can make the two side pressure blocks relatively apart to achieve conduction of the infusion hose; in the interception state, the shorter lower arm can make the two side pressure blocks relatively close together to achieve interception of the infusion hose.

[0012] In a specific feasible implementation scheme, when the automatic anti-self-flow valve is in a conducting state, the side branch arm is arc-shaped and the lower branch arm extends in a horizontal direction; when the automatic anti-self-flow valve is in a cut-off state, the side branch arm extends in a vertical direction and the lower branch arm extends in a horizontal direction.

[0013] By adopting the above technical solution, the automatic self-flow prevention valve of the present application can switch between the conducting state and the shutoff state through the deformation of the side arm.

[0014] In a specific implementation scheme, the side arm includes a side arm body, the lower arm includes a lower arm body, and movable arms are respectively connected between the two ends of the lower arm body and the two side arm bodies;

[0015] When the automatic anti-self-flow valve is in a conducting state, the two movable arms are respectively located at the two ends of the lower branch arm body and extend outward in the horizontal direction, and the two movable arms and the lower branch arm body are combined into the lower branch arm; when the automatic anti-self-flow valve is in a cut-off state, the two movable arms are respectively located at the lower ends of the two side branch arm bodies and extend downward in the vertical direction, and the movable arms and the corresponding side branch arm bodies are combined into the side branch arm.

[0016] By adopting the above-mentioned technical scheme, the automatic anti-self-flow valve of the present application can realize the switching between the conducting state and the shut-off state by changing the position of the movable arm, thereby avoiding interference between the lower arm body and the side arm body during the state switching process of the automatic anti-self-flow valve.

[0017] In a specific possible implementation scheme, the upper valve seat includes an upper support arm, which is arc-shaped and has an arc-shaped groove. A deformable upper pressure block is connected in the arc-shaped groove. The upper pressure block, the two side support arms, and the lower support arm form the valve groove.

[0018] By adopting the above technical solution, when downward pressure is applied to the upper valve seat, the upper pressure block can effectively transmit the downward pressure to the lower valve seat through its own deformation, so that the automatic self-flow prevention valve can more easily enter the conduction state from the shut-off state.

[0019] In a specific possible implementation mode, the upper support arm, the two side support arms and the lower support arm are integrally formed.

[0020] By adopting the above technical solution, when downward pressure is applied to the upper valve seat, the upper arm can effectively transmit the deformation to the two side arms and the lower arm, ensuring that the automatic self-flow prevention valve can quickly switch between the shut-off state and the conduction state.

[0021] In a specific possible implementation manner, the side pressure block is horizontally arranged on the side branch arm, and the distance between the upper side wall and the lower side wall of the side pressure block gradually decreases along the direction from the side branch arm to the infusion hose.

[0022] By adopting the above technical solution, the contact area between the side pressure blocks and the infusion hose is reduced, so that the two side pressure blocks can more easily press the two side walls of the infusion hose relative to each other.

[0023] In a specific implementation scheme, when the automatic anti-self-flow valve is in a conducting state, the upper pressure block is pressed downward, and the bottom of the upper pressure block bulges downward to form a deformation part, and an accommodating groove for accommodating the deformation part is provided between the upper side walls of the two side pressure blocks and the upper pressure block.

[0024] By adopting the above technical solution, the interference between the upper pressure block and the two side pressure blocks during the deformation process is effectively avoided, and the switching of the automatic self-flow prevention valve between the cut-off state and the conduction state is effectively guaranteed.

[0025] In a specific implementation scheme, the minimum distance between the upper side wall of the side pressure block and the upper pressure block is L1, the minimum distance between the lower side wall of the side pressure block and the lower support arm is L2, and the wall thickness of the infusion hose is δ, L1<2δ, L2<2δ.

[0026] By adopting the above technical solution, the interference between the upper pressure block and the two side pressure blocks during the deformation process is effectively avoided, and the switching of the automatic self-flow prevention valve between the cut-off state and the conduction state is effectively guaranteed.

[0027] In a specific possible implementation manner, an infusion gap is formed between the two side pressure blocks, and the two side pressure blocks are symmetrically arranged with respect to the infusion gap.

[0028] By adopting the above technical solution, the pressing direction of the two side pressing blocks on the infusion hose is effectively guaranteed, and the interception effect on the infusion hose caused by the misaligned pressing of the two side pressing blocks is avoided.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] The automatic anti-self-flow valve of the present application will deform its valve body and enter a conducting state when an external force is applied. In the conducting state, the side pressure blocks on both sides only contact the two sides of the infusion hose without applying a squeezing force thereto, so that the infusion liquid in the infusion hose can flow freely without hindrance. After the external force is removed, the valve body returns to its initial state under the action of its own deformation force, and the initial state is the interception state. In the interception state, the side pressure blocks on both sides press the two side walls of the infusion hose relative to each other, thereby automatically intercepting the infusion liquid in the infusion hose and preventing the infusion liquid from flowing into the patient's body in an uncontrolled manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the automatic self-flow prevention valve in the embodiment of the present application when it is in a conducting state.

[0032] Figure 2 It is a structural schematic diagram of the automatic self-flow prevention valve in the embodiment of the present application when it is in the shut-off state.

[0033] Figure 3 It is a schematic diagram of the installation of the automatic anti-self-flow valve in the pump cover in the embodiment of the present application.

[0034] Description of reference numerals: 1. valve body; 11. upper valve seat; 111. upper support arm; 112. arc-shaped groove; 12. lower valve seat; 121. side support arm; 1211. side support arm body; 122. lower support arm; 1221. lower support arm body; 13. movable arm; 2. valve slot; 21. containing slot; 3. side pressure block; 4. upper pressure block; 41. deformation portion; 5. infusion gap;

[0035] 100. Pump cover; 1001. Upper pump cover; 1002. Lower pump cover; 101. Infusion hose. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings.

[0037] See also Figure 1-3 As shown, an automatic anti-self-flow valve is shown, including a deformable valve body 1, a valve slot 2 opened in the valve body 1, and two side pressure blocks 3 respectively arranged on the inner walls on both sides of the valve slot 2, and the two ends of the valve slot 2 in the length direction have slots respectively, and the infusion hose 101 is axially inserted into the valve slot 2 and accommodated between the two side pressure blocks 3.

[0038] Among them, the automatic anti-self-flow valve has a conducting state and a shut-off state. When the automatic anti-self-flow valve is in the conducting state, the width of the valve slot 2 is greater than its height, the two side pressure blocks 3 are in a relatively distant state, the two side walls of the infusion hose 101 are respectively in conflict with the two side pressure blocks 3, and the two side pressure blocks 3 do not apply extrusion pressure to the infusion hose 101, at this time, the infusion liquid in the infusion hose 101 can flow freely; when the automatic anti-self-flow valve is in the shut-off state, the width of the valve slot 2 is less than its height, the two side pressure blocks 3 are in a relatively closed state, the two side pressure blocks 3 respectively apply extrusion pressure to the two sides of the infusion hose 101 and press the two side walls of the infusion hose 101 relatively together, thereby realizing the shut-off of the infusion liquid in the infusion hose 101.

[0039] Specific, combined Figure 3 As shown, the automatic anti-self-flow valve of this embodiment needs to be used in conjunction with an infusion device. When in use, the automatic anti-self-flow valve is placed in the pump cover 100 of the infusion pump. The pump cover 100 includes an upper pump cover 1001 and a lower pump cover 1002. The upper pump cover 1001 is buckled on the upper part of the valve body 1, and the lower pump cover 1002 is supported on the bottom of the valve body 1. When the pump cover 100 is closed, the upper pump cover 1001 applies downward pressure to the valve body 1, and the valve body 1 is deformed downward under the action of the downward pressure and enters a conducting state. In the conducting state, the width of the valve slot 2 is greater than its height, and the two side pressure blocks 3 are relatively far away from each other. The side pressure blocks 3 on both sides only contact the two sides of the infusion hose 101 without applying extrusion force thereto, so that the infusion liquid in the infusion hose 101 can flow freely without hindrance; when the pump cover 100 is opened, or the pump cover 100 is not closed in place, the downward pressure applied to the valve body 1 disappears, and the valve body 1 returns to the initial state under the action of its own deformation force, which is the intercepting state. In the intercepting state, the width of the valve slot 2 is less than its height, and the two side pressure blocks 3 are relatively closed, and the side pressure blocks 3 on both sides press the two side walls of the infusion hose 101 relatively, thereby automatically intercepting the infusion liquid in the infusion hose 101 to prevent the infusion liquid from flowing into the patient's body without control.

[0040] Of course, when the automatic anti-self-flow valve of the present application is not installed in the pump cover 100 of the infusion device, external force can also be applied manually to cope with temporary infusion needs, which is easy to operate.

[0041] The automatic anti-self-flow valve of the present application will not affect the flow of liquid in the infusion hose 101 when external force is applied, and can automatically intercept the liquid in the infusion hose 101 after the external force is removed, thereby preventing the infusion solution from flowing into the patient's body in an uncontrolled manner and eliminating safety hazards.

[0042] In this embodiment, if Figure 1-2As shown, the valve body 1 includes an upper valve seat 11 and a lower valve seat 12 arranged up and down, and the lower valve seat 12 includes two side branch arms 121 and a lower branch arm 122. The two side branch arms 121 are respectively connected to the two ends of the lower branch arm 122 and are integrally formed with the lower branch arm 122; when the automatic self-flow prevention valve is in a conducting state, the length of the side branch arm 121 is smaller than the length of the lower branch arm 122; when the automatic self-flow prevention valve is in a cut-off state, the length of the side branch arm 121 is greater than the length of the lower branch arm 122.

[0043] Through the above arrangement, in the conduction state, the longer lower arm 122 can make the two side pressure blocks 3 relatively apart to achieve conduction of the infusion hose 101; in the interception state, the shorter lower arm 122 can make the two side pressure blocks 3 relatively close together to achieve interception of the infusion hose 101.

[0044] When the automatic self-flow prevention valve is in the conducting state, the side arm 121 is arc-shaped, and the lower arm 122 extends in the horizontal direction; when the automatic self-flow prevention valve is in the intercepting state, the side arm 121 extends in the vertical direction, and the lower arm 122 extends in the horizontal direction. In this way, the automatic self-flow prevention valve of the present application can switch between the conducting state and the intercepting state through the deformation of the side arm 121.

[0045] In this embodiment, the side branch arm 121 includes a side branch arm body 1211, and the lower branch arm 122 includes a lower branch arm body 1221. A movable arm 13 is respectively connected between the two ends of the lower branch arm body 1221 and the two side branch arm bodies 1211; when the automatic self-flow prevention valve is in a conducting state, the two movable arms 13 are respectively located at the two ends of the lower branch arm body 1221 and extend outward in the horizontal direction, and the two movable arms 13 and the lower branch arm body 1221 are combined into the lower branch arm 122; when the automatic self-flow prevention valve is in a cut-off state, the two movable arms 13 are respectively located at the lower ends of the two side branch arm bodies 1211 and extend downward in the vertical direction, and the movable arm 13 and the corresponding side branch arm body 1211 are combined into the side branch arm 121.

[0046] Through the above-mentioned arrangement, the automatic anti-self-flow valve of the present application can switch between the conducting state and the shutoff state by changing the position of the movable arm 13, thereby avoiding interference between the lower arm body 1221 and the side arm body 1211 during the state switching process of the automatic anti-self-flow valve.

[0047] In this embodiment, if Figure 1-2As shown, the upper valve seat 11 includes an upper support arm 111, which is arc-shaped and has an arc-shaped groove 112, and a deformable upper pressure block 4 is connected in the arc-shaped groove 112. The upper pressure block 4, two side support arms 121, and the lower support arm 122 form a valve groove 2, and the upper support arm 111, the two side support arms 121, and the lower support arm 122 are integrally formed. When a downward pressure is applied to the upper valve seat 11, the upper pressure block 4 can effectively transmit the downward pressure to the lower valve seat 12 through its own deformation, so that the automatic self-flow prevention valve can more easily enter the conduction state from the cut-off state; and the upper support arm 111 can effectively transmit the deformation to the two side support arms 121 and the lower support arm 122, ensuring that the automatic self-flow prevention valve can quickly switch between the cut-off state and the conduction state; at the same time, the arc-shaped upper support arm 111 can fully contact with the upper pump cover 1001, thereby improving the effect of external force application.

[0048] In this embodiment, the side pressure block 3 is horizontally arranged on the side arm 121, and the distance between the upper side wall and the lower side wall of the side pressure block 3 gradually decreases along the direction from the side arm 121 to the infusion hose 101. This arrangement can reduce the contact area between the side pressure block 3 and the infusion hose 101 without affecting the connection strength between the side pressure block 3 and the side arm 121, so that the two side pressure blocks 3 can more easily press the two side walls of the infusion hose 101 relative to each other.

[0049] When the automatic self-flow prevention valve is in the conducting state, the upper pressure block 4 is pressed downward, and the bottom of the upper pressure block 4 bulges downward to form a deformation part 41. There is a receiving groove 21 for accommodating the deformation part 41 between the upper side walls of the two side pressure blocks 3 and the upper pressure block 4; the minimum distance between the upper side wall of the side pressure block 3 and the upper pressure block 4 is L1, the minimum distance between the lower side wall of the side pressure block 3 and the lower arm 122 is L2, and the wall thickness of the infusion hose 101 is δ, L1<2δ, L2<2δ. This setting can effectively avoid the interference between the upper pressure block 4 and the two side pressure blocks 3 during the deformation process, and effectively ensure the switching of the automatic self-flow prevention valve between the intercepting state and the conducting state.

[0050] In this embodiment, an infusion gap 5 is formed between the two side pressure blocks 3, and the two side pressure blocks 3 are symmetrically arranged about the infusion gap 5. The two symmetrically arranged side pressure blocks 3 can ensure the pressing direction of the infusion hose 101, and avoid affecting the interception effect of the infusion hose 101 due to the misaligned pressing of the two side pressure blocks 3.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic anti-self-flow valve, characterized in that: It comprises a deformable valve body (1), a valve groove (2) provided in the valve body (1), and two side pressure blocks (3) respectively arranged on the inner walls of both sides of the valve groove (2); the two ends of the valve groove (2) in the length direction respectively have notches; an infusion hose (101) is axially passed through the valve groove (2) and accommodated between the two side pressure blocks (3); The automatic anti-self-flow valve has an on state and a shutoff state. When the automatic anti-self-flow valve is in the on state, the width of the valve slot (2) is greater than its height, the two side pressure blocks (3) are relatively far apart, and the two side walls of the infusion hose (101) are respectively in contact with the two side pressure blocks (3); when the automatic anti-self-flow valve is in the shutoff state, the width of the valve slot (2) is less than its height, the two side pressure blocks (3) are relatively closed and the two side walls of the infusion hose (101) are relatively pressed together.

2. The automatic anti-self-flow valve according to claim 1, characterized in that: The valve body (1) comprises an upper valve seat (11) and a lower valve seat (12) arranged up and down, the lower valve seat (12) comprises two side arms (121) and a lower arm (122), the two side arms (121) are respectively connected to two ends of the lower arm (122) and are integrally formed with the lower arm (122); When the automatic anti-self-flow valve is in a conducting state, the length of the side arm (121) is smaller than the length of the lower arm (122); when the automatic anti-self-flow valve is in a shut-off state, the length of the side arm (121) is larger than the length of the lower arm (122).

3. The automatic anti-self-flow valve according to claim 2, characterized in that: When the automatic self-flow prevention valve is in a conducting state, the side arm (121) is arc-shaped, and the lower arm (122) extends in a horizontal direction; when the automatic self-flow prevention valve is in a shut-off state, the side arm (121) extends in a vertical direction, and the lower arm (122) extends in a horizontal direction.

4. The automatic anti-self-flow valve according to claim 2, characterized in that: The side arm (121) comprises a side arm body (1211), the lower arm (122) comprises a lower arm body (1221), and movable arms (13) are respectively connected between the two ends of the lower arm body (1221) and the two side arm bodies (1211); When the automatic anti-self-flow valve is in a conducting state, the two movable arms (13) are respectively located at the two ends of the lower arm body (1221) and extend outward in the horizontal direction, and the two movable arms (13) and the lower arm body (1221) are combined into the lower arm (122); when the automatic anti-self-flow valve is in a shut-off state, the two movable arms (13) are respectively located at the lower ends of the two side arm bodies (1211) and extend downward in the vertical direction, and the movable arms (13) and the corresponding side arm bodies (1211) are combined into the side arm (121).

5. The automatic anti-self-flow valve according to claim 2, characterized in that: The upper valve seat (11) comprises an upper support arm (111), the upper support arm (111) is arc-shaped and has an arc-shaped groove (112) thereon, a deformable upper pressure block (4) is connected in the arc-shaped groove (112), and the upper pressure block (4), the two side support arms (121) and the lower support arm (122) form the valve groove (2).

6. The automatic anti-self-flow valve according to claim 5, characterized in that: The upper support arm (111), the two side support arms (121) and the lower support arm (122) are integrally formed.

7. The automatic anti-self-flow valve according to claim 5, characterized in that: The side pressure block (3) is horizontally arranged on the side support arm (121), and the distance between the upper side wall and the lower side wall of the side pressure block (3) gradually decreases along the direction from the side support arm (121) to the infusion hose (101).

8. The automatic anti-self-flow valve according to claim 7, characterized in that: When the automatic self-flow prevention valve is in a conducting state, the upper pressing block (4) is pressed downward, and the bottom of the upper pressing block (4) bulges downward to form a deformation portion (41), and a receiving groove (21) for accommodating the deformation portion (41) is provided between the upper side walls of the two side pressing blocks (3) and the upper pressing block (4).

9. The automatic anti-self-flow valve according to claim 7, characterized in that: The minimum distance between the upper side wall of the side pressure block (3) and the upper pressure block (4) is L1, the minimum distance between the lower side wall of the side pressure block (3) and the lower support arm (122) is L2, and the wall thickness of the infusion hose (101) is δ, L1<2δ, L2<2δ.

10. The automatic anti-self-flow valve according to claim 1, characterized in that: An infusion gap (5) is formed between the two side pressure blocks (3), and the two side pressure blocks (3) are symmetrically arranged with respect to the infusion gap (5).

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