An adjustable closed negative pressure drainage device

Abstract

The present invention discloses an adjustable closed negative pressure drainage device, which relates to the technical field of negative pressure drainage, and comprises a permeable film patch, a patch layer is installed in the middle of the permeable film patch, and an elastic patch is installed in the middle of the top of the patch layer, and a fixing sheet is installed on the top of the elastic patch. In the process of treatment, when the position of the negative pressure drainage needs to be fine-tuned, the adjustment limit mechanism is started to fix the adjusted negative suction flow position, and the elastic patch is driven to stretch and move by adjusting the movement of the fixing sheet, and the position of the dressing layer is adjusted. In the process of treatment, it can be adjusted according to specific drainage needs, and the adjustment is more convenient, avoiding the inability to fix the fine-tuned position during fine-tuning, and the need to tear off the entire permeable film patch after fine-tuning, and then adjusting and applying will increase the patient's pain.

Description

Technical Field

[0001] The invention relates to the technical field of negative pressure drainage, and in particular to an adjustable closed negative pressure drainage device. Background Art

[0002] A polyvinyl alcohol hydrated seaweed salt foam dressing containing a drainage tube is used to cover or fill the wound surface of the skin or soft tissue defect, and then sealed with a biological semipermeable membrane to make it a closed space, and then the drainage tube is connected to a negative pressure source to promote wound healing through controllable negative pressure. The Chinese patent application number 201810953755.1 discloses "a multi-angle adjustable closed negative pressure drainage device, belonging to the field of medical device technology, including a dressing, a drainage tube, an air bag, a semipermeable membrane, an air inlet pipe, a flow regulator, a drainage tube adjustment component, a gas-liquid delivery component and a self-destruct component; wherein the drainage tube adjustment component includes The multi-angle adjustable closed negative pressure drainage device of the present invention sets the first clamping assembly and the second clamping assembly on the elastic plate, sets the elastic plate on the human skin, fixes the ball head seat through the first clamping assembly and the second clamping assembly, passes the drainage tube through the center hole of the universal ball head, and the universal ball head can rotate in any direction in the ball head seat to drive the drainage tube to rotate at any angle. After setting the angle of the drainage tube, fix the drainage tube adjustment assembly through the semipermeable membrane, and the airbag can cover the compression dressing and the drainage tube, so that the drainage tube and the dressing have good fit and avoid air leakage.

[0003] The existing technology only solves the problem that the position of the drainage tube may need to be adjusted, which requires peeling off the semipermeable membrane, which will inevitably touch the area around the wound, increasing the patient's pain. In severe cases, it will cause pulling of the patient's injured position, which may cause secondary injury. However, when fine-tuning the treatment area, not only is the operation not fast enough, but the patient's pain will also increase because the patch needs to be torn off again during the operation. However, after the adjustment, the adjusted position cannot be limited immediately, which will cause looseness and offset the adjusted position. When the pasted position is separated and loosened, the staff cannot find the problem in the first time. If it cannot be dealt with in time, it will cause leakage during the later treatment and affect the efficiency of the treatment. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable closed negative pressure drainage device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an adjustable closed negative pressure drainage device, comprising a permeable membrane patch, wherein a patch layer is installed in the middle of the permeable membrane patch;

[0006] An elastic dressing sheet, which is installed at the middle of the top of the application layer, and a fixing sheet is installed at the top of the elastic dressing sheet;

[0007] Connecting pipe heads, a plurality of said connecting pipe heads are installed around the top of the fixing plate, and the fixing plate is provided with installation openings around the fixing plate at positions relative to the connecting pipe heads;

[0008] A negative pressure pump, wherein the negative pressure pump is movably arranged at the top of the permeable membrane patch, an air pipe is installed at the bottom of the negative pressure pump through bolts, and the bottom of the air pipe is connected to the top of the connecting pipe head;

[0009] An abnormal alarm mechanism, the abnormal alarm mechanism comprises a detection tube head and an annular guide ring, the detection tube head is installed in the upper middle end of the trachea, and the annular guide ring is movably installed in the upper middle end of the inner cavity of the detection tube head;

[0010] A warning mechanism, the warning mechanism comprising a mounting ring groove, the mounting ring groove being arranged around the top of the permeable film patch;

[0011] An adjustment and limiting mechanism, the adjustment and limiting mechanism comprises a mounting base and a fixing block, the mounting base is movably mounted on the middle right side of the top end of the permeable film patch, and the fixing block is mounted on the middle right side of the top end of the fixing patch;

[0012] The two ring-shaped patches are bonded and mounted with a permeable film patch around the bottom, and a sealing cotton layer is mounted around the bottom of the patch layer.

[0013] Preferably, the warning mechanism also includes a color-changing test paper, a cotton strip and a contact cotton piece. The color-changing test paper is installed inside the mounting ring groove by bonding. The mounting ring groove, the color-changing test paper and the contact cotton piece are all rectangular structures. Several of the cotton strips are installed around the bottom of the color-changing test paper by bonding. The contact cotton piece is installed at the bottom of the cotton strip by bonding. The contact cotton piece is located between the annular patches on both sides. The color-changing test paper is a PH test paper. An alarm is installed on the outside of the negative pressure pump.

[0014] Preferably, the abnormal alarm mechanism also includes a detection slot, a shrinkage airbag, a movable block, a reset spring, a contact block and an installation film. The detection slots on both sides are opened on both sides of the inner cavity of the detection tube head. The two shrinkage airbags are installed in the middle of the inner cavity of the detection slot by bolts. The two movable blocks are respectively installed at the bottom of the shrinkage airbags by bolts. The two installation films are installed at the middle and lower ends of the inner cavity of the detection slots on both sides by bolts. The four contact blocks are respectively installed at the bottom of the movable block and the top of the installation film by bolts. The bottom ends of the movable blocks on both sides are movably installed with a stable base frame through the installation film. The reset springs on both sides are installed at the bottom ends of the inner cavity of the detection slots on both sides by bolts. The top ends of the reset springs are connected to the bottom end of the stable base frame by bolts. The contact blocks at the upper and bottom ends respectively use external power supplies and are electrically connected to external alarms respectively.

[0015] Preferably, a number of balls are installed equidistantly around the outside of the movable block, connecting grooves are opened on the upper ends of the opposite sides of the detection slots on both sides, the reset springs are made of spring steel, the shrinkage airbags are made of synthetic rubber, and the annular guide ring has a funnel-shaped structure.

[0016] Preferably, the adjustment and limiting mechanism also includes an adjustment telescopic rod, a mounting ball, a silicone mounting block and a mounting sheet, the silicone mounting block is mounted on the bottom end of the mounting base by bonding, the mounting sheet is mounted on the bottom end of the silicone mounting block by bonding, the bottom end of the mounting sheet is connected to the middle right part of the top end of the membrane-permeable patch by bonding, the mounting ball is movably mounted on the top end of the mounting base, the adjustment telescopic rod is mounted on the middle right part of the fixed block by bolts, and the end of the adjustment telescopic rod away from the fixed block is connected to the upper left end of the mounting ball by bolts.

[0017] Preferably, a mounting circular groove is provided at the top of the mounting base, and a mounting recess is provided at the upper middle end of the right side of the inner cavity of the mounting circular groove, a limiting screw is movably installed in the middle of one side of the inner cavity of the mounting recess, a limiting extrusion block is installed on the left end of the limiting screw through a bearing, a mounting screw opening is provided in the middle of the right side of the inner cavity of the mounting recess, a rubber layer is installed on the side of the limiting extrusion block away from the limiting screw by bonding, and the side of the limiting extrusion block away from the limiting screw is in an arc-shaped structure.

[0018] Preferably, a dressing layer is added to the bottom end of the elastic dressing sheet, a mounting frame plate is installed on the top of the negative pressure pump by bolts, four fixing screw holes are opened around the top of the mounting frame plate, a control switch is installed on the outside of the negative pressure pump, the cross-section of the elastic dressing sheet is a trapezoidal structure, and the mounting base is a cylindrical structure.

[0019] Preferably, both sides of the front end and the rear end of the translucent film patch are installed with straps by bonding, and the end of the strap away from the translucent film patch is installed with a positioning patch by bonding, and the positioning patch is in a rectangular structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the process of treatment, when the position of the negative pressure drainage needs to be fine-tuned, the adjustment limit mechanism is activated to fix the adjusted negative suction flow position. By adjusting the movement of the fixing sheet, the elastic dressing sheet is driven to stretch and move, and the position of the dressing layer is adjusted. In the process of treatment, the adjustment can be made according to the specific drainage needs, and the adjustment is more convenient, avoiding the inability to fix the fine-tuned position during fine-tuning, and the need to tear off the entire applied permeable film dressing sheet during fine-tuning, which will increase the patient's pain and even cause secondary injury.

[0022] 2. The present invention also uses the warning mechanism to detect looseness and separation, so that the staff can find the problem at the first time and deal with the separated position at the first time, thereby increasing the firmness during the drainage process and avoiding separation of the pasted position during the drainage process. If the separation cannot be handled at the first time and leakage occurs, it will not be possible to ensure that a sealed area is formed inside the treatment area, which will affect the drainage efficiency and even cause infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Provides an overall structural diagram for an embodiment of the present invention;

[0024] Figure 2 A three-dimensional structural diagram of an adjustable telescopic rod and a mounting base provided in an embodiment of the present invention;

[0025] Figure 3 A structural diagram of an internal cross-section of an elastic patch provided by an embodiment of the present invention;

[0026] Figure 4 A structural diagram of an internal cross-section of a mounting base provided in an embodiment of the present invention;

[0027] Figure 5 A structural diagram of the internal cross-section of a detection tube head provided by an embodiment of the present invention;

[0028] Figure 6 The embodiment of the present invention provides Figure 3 A magnified structural diagram.

[0029] In the figure: 1. Transmembrane patch; 2. Warning mechanism; 201. Color-changing test paper; 202. Installation ring groove; 203. Cotton strip; 204. Contact cotton pad; 3. Abnormal alarm mechanism; 301. Detection tube head; 302. Detection notch; 303. Contraction airbag; 304. Movable block; 305. Reset spring; 306. Contact block; 307. Installation bottom film; 308. Ring guide ring; 4. Adjustment limit mechanism; 401. Installation Install the base; 402, fixing block; 403, adjusting telescopic rod; 404, installing the ball; 405, silicone mounting block; 406, mounting sheet; 5, negative pressure pump; 6, mounting frame; 7, fixing sheet; 8, application layer; 9, elastic application sheet; 10, positioning patch; 11, binding strap; 12, connecting pipe head; 13, sealing cotton layer; 14, ring patch; 15, limiting extrusion block; 16, limiting screw; 17, installing notch. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the present invention provides a technical solution: an adjustable closed negative pressure drainage device, comprising a permeable membrane patch 1, a patch layer 8 is installed in the middle of the permeable membrane patch 1;

[0032] An elastic dressing sheet 9 is installed at the middle of the top of the application layer 8, and a fixing sheet 7 is installed at the top of the elastic dressing sheet 9;

[0033] Connecting pipe heads 12, a plurality of connecting pipe heads 12 are installed around the top of the fixing plate 7, and the fixing plate 7 is provided with installation openings around the fixing plate 7 at positions relative to the connecting pipe heads 12;

[0034] A negative pressure pump 5, which is movably arranged at the top of the permeable film patch 1, and an air pipe is installed at the bottom of the negative pressure pump 5 through bolts, and the bottom of the air pipe is connected to the top of the connecting pipe head 12;

[0035] Abnormal alarm mechanism 3, the abnormal alarm mechanism 3 comprises a detection tube head 301 and an annular guide ring 308, the detection tube head 301 is installed in the upper middle end of the trachea, and the annular guide ring 308 is movably installed in the upper middle end of the inner cavity of the detection tube head 301;

[0036] The warning mechanism 2 includes a mounting ring groove 202, and the mounting ring groove 202 is provided around the top of the permeable film patch 1;

[0037] The adjusting and limiting mechanism 4 includes a mounting base 401 and a fixing block 402. The mounting base 401 is movably mounted on the middle right side of the top of the permeable film patch 1, and the fixing block 402 is mounted on the middle right side of the top of the fixing patch 7;

[0038] The two ring-shaped patches 14 are installed around the bottom end of the permeable film patch 1 by bonding, and the sealing cotton layer 13 is installed around the bottom end of the patch layer 8.

[0039] The warning mechanism 2 also includes a color-changing test paper 201, a cotton strip 203 and a contact cotton sheet 204. The color-changing test paper 201 is installed inside the mounting ring groove 202 by bonding. The mounting ring groove 202, the color-changing test paper 201 and the contact cotton sheet 204 are all rectangular structures. Several cotton strips 203 are installed around the bottom of the color-changing test paper 201 by bonding. The contact cotton sheet 204 is installed at the bottom of the cotton strip 203 by bonding. The contact cotton sheet 204 is located between the annular patches 14 on both sides. The color-changing test paper 201 is a PH test paper. An alarm is installed outside the negative pressure pump 5.

[0040] The abnormal alarm mechanism 3 also includes a detection slot 302, a shrinking airbag 303, a movable block 304, a reset spring 305, a contact block 306 and an installation bottom plate 307. The detection slots 302 on both sides are opened on both sides of the inner cavity of the detection tube head 301. The two shrinking airbags 303 are installed in the middle of the inner cavity of the detection slot 302 by bolts. The two movable blocks 304 are respectively installed at the bottom of the shrinking airbag 303 by bolts. The two installation bottom plates 307 are installed at the lower and middle ends of the inner cavity of the detection slots 302 on both sides by bolts. The four contact blocks 306 are respectively installed at the bottom of the movable blocks 304 and the top of the installation bottom plates 307 by bolts. The bottom ends of the movable blocks 304 on both sides pass through the installation bottom plates 307 and are movably installed with a stable chassis. The reset springs 305 on both sides are installed on the detection plates on both sides by bolts. The bottom end of the inner cavity of the slot 302 and the top end of the reset spring 305 are connected to the bottom end of the stable chassis by bolts, and the contact blocks 306 at the upper and lower ends respectively use external power supplies and are electrically connected to external alarms. In this way, during the negative pressure drainage process, if it is found that the abnormal negative pressure becomes pressurized, the gas will be transported to the inside of the detection slot 302 through the annular guide ring 308. When the contraction airbag 303 receives air and expands, it will push the movable block 304 to move downward and squeeze the reset spring 305. Later, the movable block 304 is reset by the reset spring 305 after squeezing. When the contact block 306 at the upper end contacts the contact block 306 at the bottom end, the alarm will be activated to tell the staff that an abnormality has occurred and the treatment needs to be stopped, and the abnormal situation will be handled.

[0041] A number of balls are installed around the movable block 304 at equal intervals. A connecting slot is provided at the upper end of the opposite side of the detection slots 302 on both sides. The return spring 305 is made of spring steel, the shrink airbag 303 is made of synthetic rubber, and the annular guide ring 308 is funnel-shaped.

[0042] The adjustment and limiting mechanism 4 also includes an adjustment telescopic rod 403, a mounting ball 404, a silicone mounting block 405 and a mounting sheet 406. The silicone mounting block 405 is mounted on the bottom end of the mounting base 401 by bonding, and the mounting sheet 406 is mounted on the bottom end of the silicone mounting block 405 by bonding. The bottom end of the mounting sheet 406 is connected to the middle part of the right side of the top end of the permeable film patch 1 by bonding. The mounting ball 404 is movably mounted on the top end of the mounting base 401. The adjustment telescopic rod 403 is mounted on the middle part of the right side of the fixed block 402 by bolts, and the end of the adjustment telescopic rod 403 away from the fixed block 402 is connected to the upper end of the left side of the mounting ball 404 by bolts.

[0043] A mounting circular groove is provided at the top of the mounting base 401, and a mounting recess 17 is provided at the middle and upper end of the right side of the inner cavity of the mounting circular groove. A limiting screw 16 is movably installed in the middle of one side of the inner cavity of the mounting recess 17. A limiting extrusion block 15 is installed on the left end of the limiting screw 16 through a bearing. A mounting screw hole is provided in the middle of the right side of the inner cavity of the mounting recess 17. A rubber layer is installed on the side of the limiting extrusion block 15 away from the limiting screw 16 by bonding. The side of the limiting extrusion block 15 away from the limiting screw 16 is in an arc-shaped structure, so that rotating the limiting screw 16 drives the limiting extrusion block 15 to move to one side of the inner cavity of the mounting recess 17, so that the limiting extrusion block 15 is separated from the mounting ball 404, and the mounting ball 404 loses its restraining force;

[0044] A dressing layer is added to the bottom of the elastic dressing sheet 9, a mounting frame plate 6 is installed on the top of the negative pressure pump 5 by bolts, four fixing screw holes are opened around the top of the mounting frame plate 6, and a control switch is installed on the outside of the negative pressure pump 5. The cross-section of the elastic dressing sheet 9 is a trapezoidal structure, and the mounting base 401 is a cylindrical structure, so that the negative pressure pump 5 can be easily installed and fixed by the mounting frame plate 6;

[0045] Both sides of the front and rear ends of the translucent film patch 1 are installed with straps 11 by bonding, and the end of the strap 11 away from the translucent film patch 1 is installed with a positioning patch 10 by bonding. The positioning patch 10 is a rectangular structure. In this way, the straps 11 and the positioning patch 10 increase the firmness of the translucent film patch 1 when it is fixed.

[0046] Working principle: During the treatment process of the present invention, the size of the area to be treated is first determined, and then a permeable film patch 1 larger than the treatment area is manufactured, and the permeable film patch 1 is applied to the treatment area, so that the dressing layer at the bottom end of the elastic patch 9 contacts the treatment area, and the trachea is contacted and fixed with the connecting pipe head 12 at the top of the fixing plate 7, and the treatment is then carried out after the negative pressure pump 5 is started. When it is necessary to fine-tune the position of the negative pressure drainage, the length of the adjusting telescopic rod 403 is adjusted, and the positions of the fixing plate 7 and the connecting pipe head 12 are moved left and right, and the limiting screw 16 is rotated to drive the limiting extrusion block 15 to move to one side of the inside of the installation recess 17, so that the limiting extrusion block 15 is separated from the installation ball 404, so that the installation ball 404 loses its restraint force, and the adjusting telescopic rod 4 after adjustment is driven with the installation ball 404 as the axis. 03 is moved forward and backward, and the fixing sheet 7 is fine-tuned. After the adjustment is moved to the appropriate position, the limiting screw 16 is rotated to drive the limiting extrusion block 15 to move, so that the limiting extrusion block 15 contacts and squeezes the outside of the installation ball 404, and the adjusted installation ball 404 is fixed, and the adjusted negative suction flow position is fixed. By adjusting the movement of the fixing sheet 7, the elastic dressing sheet 9 is driven to stretch and move, and the position of the dressing layer is adjusted. In the treatment process, it can be adjusted according to specific drainage needs, and the adjustment is more convenient, avoiding the inability to fix the fine-tuned position during fine-tuning, and the need to tear off the entire applied permeable film dressing sheet 1 during fine-tuning. Adjusting and applying again will increase the patient's pain and even cause secondary injuries.

[0047] After the transmembrane patch 1 is applied, it is fixed by the annular patch 14. When the annular patch 14 close to the application layer 8 separates and leaks during use, the liquid generated during drainage will be absorbed by the contact cotton sheet 204, and the absorbed liquid will be guided into the color-changing test paper 201 through the cotton strip 203. Since the color-changing test paper 201 is a PH test paper, when the liquid contacts the PH test paper, the color-changing test paper 201 will change, and the staff can find the problem at the first time, and deal with the separation position at the first time, increase the firmness during the drainage process, and avoid separation of the pasted position during the drainage process. If it cannot be dealt with at the first time, resulting in leakage, it cannot be guaranteed that a sealed area is formed inside the treatment area, which affects the drainage efficiency and even causes infection.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable closed negative pressure drainage device, comprising a permeable membrane patch (1), wherein a patch layer (8) is installed in the middle of the permeable membrane patch (1), characterized in that: An elastic dressing sheet (9), the elastic dressing sheet (9) being mounted at the middle of the top end of the application layer (8), and a fixing sheet (7) being mounted at the top end of the elastic dressing sheet (9); A connecting pipe head (12), wherein a plurality of the connecting pipe heads (12) are mounted around the top of the fixing plate (7), and mounting openings are provided around the fixing plate (7) at positions relative to the connecting pipe heads (12); A negative pressure pump (5), the negative pressure pump (5) being movably arranged at the top end of the transmembrane patch (1), an air pipe being installed at the bottom end of the negative pressure pump (5) via bolts, and the bottom end of the air pipe being connected to the top end of the connecting pipe head (12); An abnormality alarm mechanism (3), the abnormality alarm mechanism (3) comprising a detection tube head (301) and an annular guide ring (308), the detection tube head (301) being mounted at the middle upper end of the trachea, and the annular guide ring (308) being movably mounted at the middle upper end of the inner cavity of the detection tube head (301); A warning mechanism (2), the warning mechanism (2) comprising a mounting ring groove (202), the mounting ring groove (202) being arranged around the top of the permeable membrane patch (1); An adjustment and limiting mechanism (4), the adjustment and limiting mechanism (4) comprising a mounting base (401) and a fixing block (402), the mounting base (401) being movably mounted at the middle right portion of the top end of the permeable film patch (1), and the fixing block (402) being mounted at the middle right portion of the top end of the fixing patch (7); Ring-shaped patches (14), wherein two of the ring-shaped patches (14) are mounted on the periphery of the bottom end of the permeable film patch (1) by bonding, and a sealing cotton layer (13) is mounted on the periphery of the bottom end of the patch layer (8); The warning mechanism (2) further comprises a color-changing test paper (201), a cotton strip (203) and a contact cotton sheet (204); the color-changing test paper (201) is mounted inside the mounting ring groove (202) by bonding; the mounting ring groove (202), the color-changing test paper (201) and the contact cotton sheet (204) are all rectangular structures; a plurality of cotton strips (203) are mounted around the bottom end of the color-changing test paper (201) by bonding; the contact cotton sheet (204) is mounted at the bottom end of the cotton strip (203) by bonding; the contact cotton sheet (204) is located between the annular patches (14) on both sides; the color-changing test paper (201) is a pH test paper; and an alarm is mounted outside the negative pressure pump (5); The abnormal alarm mechanism (3) further comprises a detection slot (302), a shrinking airbag (303), a movable block (304), a reset spring (305), a contact block (306) and a mounting bottom plate (307), wherein the detection slots (302) on both sides are provided on both sides of the inner cavity of the detection tube head (301), the two shrinking airbags (303) are mounted in the middle of the inner cavity of the detection slots (302) by means of bolts, the two movable blocks (304) are respectively mounted at the bottom ends of the shrinking airbags (303) by means of bolts, and the two mounting bottom plates (307) are mounted on the detection slots (302) on both sides by means of bolts. At the lower middle end of the inner cavity of the slot (302), the four contact blocks (306) are respectively mounted on the bottom end of the movable block (304) and the top end of the mounting bottom plate (307) by bolts, the bottom ends of the movable blocks (304) on both sides pass through the mounting bottom plate (307) and are movably mounted with a stable bottom frame, the return springs (305) on both sides are mounted on the bottom ends of the inner cavity of the detection slot (302) on both sides by bolts, the top ends of the return springs (305) are connected to the bottom end of the stable bottom frame by bolts, and the contact blocks (306) at the upper and lower ends respectively use external power supplies and are respectively electrically connected to external alarms; A plurality of balls are equidistantly mounted around the outside of the movable block (304), and a connecting groove is provided at the upper end of the opposite side of the detection notches (302) on both sides, the return spring (305) is made of spring steel, the shrink airbag (303) is made of synthetic rubber, and the annular guide ring (308) is funnel-shaped; The adjustment and limiting mechanism (4) further comprises an adjustment telescopic rod (403), a mounting ball (404), a silicone mounting block (405) and a mounting sheet (406), wherein the silicone mounting block (405) is mounted on the bottom end of the mounting base (401) by bonding, and the mounting sheet (406) is mounted on the bottom end of the silicone mounting block (405) by bonding, and the bottom end of the mounting sheet (406) is connected to the middle right side of the top end of the transmembrane patch (1) by bonding, and the mounting ball (404) is movably mounted on the top end of the mounting base (401), and the adjustment telescopic rod (403) is mounted on the middle right side of the fixing block (402) by bolts, and the end of the adjustment telescopic rod (403) away from the fixing block (402) is connected to the upper left side of the mounting ball (404) by bolts; A mounting circular groove is provided at the top of the mounting base (401), and a mounting recess (17) is provided at the middle upper end of the right side of the inner cavity of the mounting circular groove, a limit screw (16) is movably installed in the middle of one side of the inner cavity of the mounting recess (17), a limit extrusion block (15) is installed at the left end of the limit screw (16) via a bearing, a mounting screw opening is provided in the middle of the right side of the inner cavity of the mounting recess (17), a rubber layer is installed on the side of the limit extrusion block (15) away from the limit screw (16) by bonding, and the side of the limit extrusion block (15) away from the limit screw (16) is in an arc-shaped structure; A dressing layer is added to the bottom of the elastic dressing sheet (9), a mounting frame plate (6) is mounted on the top of the negative pressure pump (5) by means of bolts, four fixing screw holes are provided around the top of the mounting frame plate (6), a control switch is mounted on the outside of the negative pressure pump (5), the cross section of the elastic dressing sheet (9) is a trapezoidal structure, and the mounting base (401) is a cylindrical structure; During the negative pressure drainage process, if it is found that the abnormal negative pressure becomes increased pressure, the gas is transported to the inside of the detection slot (302) through the annular guide ring (308), and when the contraction airbag (303) receives air and expands, it pushes the movable block (304) to move downward and squeezes the return spring (305). Later, the return spring (305) after squeezing drives the movable block (304) to reset, and when the upper contact block (306) contacts the lower contact block (306), the alarm is activated.

2. The adjustable closed negative pressure drainage device according to claim 1, characterized in that: Both the front and rear ends of the translucent film patch (1) are installed with binding strips (11) by bonding, and one end of the binding strip (11) away from the translucent film patch (1) is installed with a positioning patch (10) by bonding, and the positioning patch (10) is in a rectangular structure.

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