Negative pressure device for preventing liquid from flowing back

Abstract

The utility model relates to the technical field of medical treatment, and discloses a negative pressure device for preventing liquid backflow, which comprises a negative pressure device body, the bottom of the negative pressure device body is provided with a filter through an air valve, the bottom of the filter is provided with an expectoration cylinder, and the right side of the filter is provided with a tube separating mechanism. Connecting mechanisms are arranged on the front face and the back face of the filter, the pipe separating mechanism comprises a connecting pipe, the connecting pipe is fixedly connected to the right side of the filter, a fixing pipe is connected to the inner wall of the connecting pipe in an inserted mode, and the outer wall of the fixing pipe is sleeved with a mounting sleeve. According to the negative pressure device capable of preventing the liquid from flowing back, limiting of an L-shaped sliding groove of a fixing column can be relieved by pulling a limiting column, the fixing column can slide along the L-shaped sliding groove by rotating the fixing column so that a fixing pipe can be rapidly disassembled and assembled in an installation sleeve, meanwhile, two clamping hooks are arranged to be clamped to a clamping rod, and therefore the liquid can be prevented from flowing back. The stable connection between the filter and the expectoration cylinder is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medical treatment, in particular to a negative pressure device for preventing liquid backflow. Background Art

[0002] The negative pressure device in the ward environment is often applicable to the suction of sputum in cases such as dyspnea caused by increased sputum, dyspnea caused by airway spasm and stenosis due to coughing, decreased blood oxygen saturation caused by foreign body obstruction in the respiratory tract, massive hemorrhage and hemoptysis caused by diseases in patients. The negative pressure device consists of a pressure regulator, a sputum expectoration cylinder, a hose, etc. There are two hose interfaces on the sputum expectoration cylinder, one connected to the terminal of the negative pressure device and the other connected to the working cavity. When the terminal of the negative pressure device is connected, air negative pressure is generated in the sputum expectoration cylinder, and this negative pressure will guide dirt (such as sputum, blood, secretions, etc.) to flow into the sputum expectoration cylinder from the other hose.

[0003] However, when the liquid in the sputum expectoration cylinder reaches a certain height, it may flow back to the pressure regulator, resulting in damage to the negative pressure device. In order to avoid the backflow of the contents in the sputum expectoration cylinder from damaging the negative pressure device, a filter needs to be additionally connected. The existing filters usually cannot be directly anastomosed with the interfaces of the negative pressure device, and a third-party interface needs to be found to achieve the anastomosis between the filter and the negative pressure device. When negative pressure suction is required clinically, it is usually an emergency state. If the equipment cannot be connected well in the first place and timely and effective suction operation cannot be given to the patient, the patient's condition will be greatly delayed, thus causing a series of subsequent problems. For example, if the patient does not receive timely treatment, the patient's condition may deteriorate, causing the patient to suffer more pain. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a negative pressure device for preventing liquid backflow. This negative pressure device does not need to be anastomosed with the filter through a third-party interface, can quickly build a negative pressure suction environment, improve the nursing efficiency and reduce the waiting time of the patient.

[0005] To achieve the above object, the utility model provides the following technical solution: A negative pressure device for preventing liquid backflow, including a negative pressure device body, a filter is installed at the bottom of the negative pressure device body through a gas valve, a sputum expectoration cylinder is installed at the bottom of the filter, a tube detachment mechanism is arranged on the right side of the filter, and connection mechanisms are arranged on the front and back of the filter.

[0006] Preferably, the tube detachment mechanism includes: a connecting tube, the connecting tube is fixedly connected to the right side of the filter, a fixing tube is inserted into the inner wall of the connecting tube, an installation sleeve is sleeved on the outer wall of the fixing tube, and a threaded sleeve is fixedly connected to the left side of the installation sleeve, and the installation sleeve is threadedly connected to the outer wall of the connecting tube through the threaded sleeve.

[0007] Preferably, a conical sleeve is fixedly connected to the right side of the mounting sleeve and sleeved on the outer wall of the fixed tube. A sputum suction tube is fixedly connected to the inner wall of the fixed tube. An installation groove is formed in the top of the mounting sleeve. A fixing plate is fixedly connected to the inner wall of the installation groove. A moving hole is formed in the fixing plate. A T-shaped block is slidably connected in the moving hole. The top of the T-shaped block is fixedly connected with a moving plate and is located on the top of the fixing plate. A limiting post is fixedly connected to the left side of the moving plate. An L-shaped groove is formed in the outer wall of the fixed tube. The bottom of the limiting post is slidably connected in the L-shaped groove. A circular groove is formed in the right side of the inner wall of the installation groove. A round rod is slidably connected in the circular groove. The left side of the round rod is attached to the outer wall of the limiting post. A spring is installed on the inner wall of the circular groove for resetting the leftward movement of the round rod.

[0008] Preferably, the connecting mechanism includes: a first mounting block and a second mounting block. There are two first mounting blocks and two second mounting blocks respectively. The two first mounting blocks and the two second mounting blocks are respectively fixedly connected to the outer walls of the filter and the sputum expectoration cylinder. A hook is hinged between the two second mounting blocks through a pin shaft. A clamping rod is fixedly connected between the two first mounting blocks. The hook is clamped on the clamping rod.

[0009] Preferably, two sets of the connecting mechanism are provided and are symmetrically arranged on the front and back sides of the outer walls of the filter and the sputum expectoration cylinder respectively.

[0010] Preferably, the top of the sputum expectoration cylinder is inserted into the bottom of the filter, and a sealing ring is arranged at the bottom of the filter.

[0011] Compared with the prior art, the present utility model provides a negative pressure device for preventing liquid backflow, which has the following beneficial effects:

[0012] For the negative pressure device for preventing liquid backflow, by pulling the limiting post, the limitation on the L-shaped sliding groove of the fixed post can be released, and by rotating the fixed post, it can slide along the L-shaped sliding groove, so as to realize the quick disassembly and installation of the fixed tube in the mounting sleeve. At the same time, by setting two hooks to be respectively clamped on the clamping rod, the connection between the filter and the sputum expectoration cylinder is made stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic partial sectional structural diagram of the present utility model Figure 1 ;

[0015] Figure 3 is a schematic partial sectional structural diagram of the present utility model Figure 2 ;

[0016] Figure 4 Schematic enlarged structure view of part A of the present utility model;

[0017] Figure 5 Schematic enlarged structure view of part B of the present utility model;

[0018] Figure 6 Schematic structure view of the fixed tube of the present utility model.

[0019] In the figure: 1. Negative pressure device body; 2. Air valve; 3. Filter; 4. Sputum expectoration cylinder; 5. Tube detachment mechanism; 6. Connection mechanism; 501. Connecting tube; 502. Threaded sleeve; 503. Mounting sleeve; 504. Conical sleeve; 505. Mounting groove; 506. Fixed plate; 507. Movable plate; 508. T-shaped block; 509. Spring; 510. Round rod; 511. Limit post; 512. Fixed tube; 513. Suction tube; 601. First mounting block; 602. Second mounting block; 603. Hook; 604. Rod; 605. Pin shaft. Detailed implementation mode Embodiment

[0020] As Figures 1-6 shown, the present utility model provides a negative pressure device for preventing liquid backflow, which includes a negative pressure device body 1. A filter 3 is installed at the bottom of the negative pressure device body 1 through an air valve 2. A sputum expectoration cylinder 4 is installed at the bottom of the filter 3. A tube detachment mechanism 5 is arranged on the right side of the filter 3, and a connection mechanism 6 is arranged on the front and back sides of the filter 3.

[0021] The tube detachment mechanism 5 includes: a connecting tube 501, the connecting tube 501 is fixedly connected to the right side of the filter 3. A fixed tube 512 is inserted into the inner wall of the connecting tube 501. A mounting sleeve 503 is sleeved on the outer wall of the fixed tube 512, and a threaded sleeve 502 is fixedly connected to the left side of the mounting sleeve 503. The mounting sleeve 503 is threadedly connected to the outer wall of the connecting tube 501 through the threaded sleeve 502.

[0022] A conical sleeve 504 is fixedly connected to the right side of the mounting sleeve 503 and is sleeved on the outer wall of the fixed tube 512. A suction tube 513 is fixedly connected to the inner wall of the fixed tube 512. A mounting groove 505 is provided at the top of the mounting sleeve 503. A fixing plate 506 is fixedly connected to the inner wall of the mounting groove 505. A movable hole is provided on the fixing plate 506. A T-block 508 is slidably connected in the movable hole. A movable plate 507 is fixedly connected to the top of the T-block 508 and is located at the top of the fixed plate 506. A limiting column 511 is fixedly connected to the left side of the movable plate 507. An L-shaped groove is provided on the outer wall of the fixed tube 512. The bottom of the limiting column 511 is slidably connected in the L-shaped groove. A circular groove is provided on the right side of the inner wall of the mounting groove 505. A round rod 510 is slidably connected in the circular groove. The left side of the round rod 510 is fitted with the outer wall of the limiting column 511. A spring 509 is installed on the inner wall of the circular groove for resetting the round rod 510 to move to the left.

[0023] In this embodiment, by setting up the tube-detaching mechanism 5, when in use, the installation sleeve 503 is installed on the outer wall of the connecting tube 501 by rotating the threaded sleeve, and then the fixed tube 512 connected to the suction tube 513 is inserted into the inner wall of the installation sleeve 503, and by pulling the limiting column 511, the L-shaped groove of the fixed tube 512 is in contact with the bottom of the limiting column 511, and after being pushed into the interior, the fixed tube 512 is rotated so that the bottom of its limiting column 511 contacts the inside of the L-shaped groove, and then the limiting column 511 is released. Under the action of the spring 509, the round rod 510 is pushed to move to the left, thereby pushing the limiting column 511 to move to the left, thereby cooperating with the L-shaped groove to achieve resistance to the fixed tube 512, limiting the movement of the fixed tube, so as to achieve a fixing effect. Example

[0024] like Figures 1-6 As shown, on the basis of embodiment 1, the utility model provides a technical solution: the connection mechanism 6 comprises: a first mounting block 601 and a second mounting block 602, two first mounting blocks 601 and two second mounting blocks 602 are respectively provided, the two first mounting blocks 601 and the second mounting blocks 602 are respectively fixedly connected to the outer wall of the filter 3 and the sputum tube 4, a hook 603 is hinged between the two second mounting blocks 602 through a pin 605, a clamping rod 604 is fixedly connected between the two first mounting blocks 601, and the hook 603 is clamped on the clamping rod 604. The connection mechanism 6 is provided with two groups, which are symmetrically arranged on the front and rear sides of the outer wall of the filter 3 and the sputum tube 4.

[0025] The top of the sputum tube 4 is plugged into the bottom of the filter 3 , and a sealing ring is provided at the bottom of the filter 3 .

[0026] In this embodiment, by setting up the connecting mechanism 6, the expectoration cylinder 4 can be inserted into the interior of the filter 3, and then by rotating the catch 603, its top can be caught on the catch rod 604 to achieve the purpose of fixation. The sealing ring can ensure that when the expectoration cylinder 4 is connected to the filter 3, the internal solution will not leak outwards.

[0027] The working principle of this negative pressure device for preventing liquid backflow:

[0028] As Figures 1-6 shown, during use, first, through the detachable tube mechanism 5 set, when in use, the mounting sleeve 503 is installed on the outer wall of the connecting tube 501 by rotating the threaded sleeve, and then the fixed tube 512 of the connecting sputum suction tube 513 is inserted into the inner wall of the mounting sleeve 503. By pulling the limit post 511, the L-shaped sliding groove of the fixed tube 512 is brought into contact with the bottom of the limit post 511. After being pushed into the interior, by rotating the fixed tube 512, the bottom of its limit post 511 is brought into contact with the interior of the L-shaped sliding groove, and then the limit post 511 is released. Under the action of the spring 509, the round rod 510 is pushed to move to the left, thereby pushing the limit post 511 to move to the left, so as to cooperate with the L-shaped sliding groove to resist and fix the fixed tube 512 and restrict the movement of the fixed tube, achieving a fixing effect. By setting up the connecting mechanism 6, the expectoration cylinder 4 can be inserted into the interior of the filter 3, and then by rotating the catch 603, its top can be caught on the catch rod 604 to achieve the purpose of fixation. The sealing ring can ensure that when the expectoration cylinder 4 is connected to the filter 3, the internal solution will not leak outwards.

Claims

1. A negative pressure device for preventing liquid backflow, comprising a negative pressure device body (1), characterized in that: The bottom of the negative pressure device body (1) is installed with a filter (3) through a gas valve (2). A sputum collecting cylinder (4) is installed at the bottom of the filter (3). A tube detachment mechanism (5) is arranged on the right side of the filter (3), and connection mechanisms (6) are arranged on the front and back sides of the filter (3).

2. The negative pressure device for preventing liquid backflow according to claim 1, wherein: The tube detachment mechanism (5) includes: a connecting tube (501). The connecting tube (501) is fixedly connected to the right side of the filter (3). A fixed tube (512) is inserted into the inner wall of the connecting tube (501). An installation sleeve (503) is sleeved on the outer wall of the fixed tube (512). The left side of the installation sleeve (503) is fixedly connected with a threaded sleeve (502). The installation sleeve (503) is threadedly connected to the outer wall of the connecting tube (501) through the threaded sleeve (502).

3. The negative pressure device for preventing liquid backflow according to claim 2, wherein: A conical sleeve (504) is fixedly connected to the right side of the installation sleeve (503) and is sleeved on the outer wall of the fixed tube (512). A sputum suction tube (513) is fixedly connected to the inner wall of the fixed tube (512). An installation groove (505) is formed at the top of the installation sleeve (503). A fixing plate (506) is fixedly connected to the inner wall of the installation groove (505). A moving hole is formed in the fixing plate (506). A T-shaped block (508) is slidably connected in the moving hole. The top of the T-shaped block (508) is fixedly connected with a moving plate (507) and is located at the top of the fixing plate (506). A limiting column (511) is fixedly connected to the left side of the moving plate (507). An L-shaped groove is formed on the outer wall of the fixed tube (512). The bottom of the limiting column (511) is slidably connected in the L-shaped groove. A circular groove is formed on the right side of the inner wall of the installation groove (505). A round rod (510) is slidably connected in the circular groove. The left side of the round rod (510) is in contact with the outer wall of the limiting column (511). A spring (509) is installed on the inner wall of the circular groove for resetting the leftward movement of the round rod (510).

4. A negative pressure device for preventing liquid backflow according to claim 1, characterized in that: The connection mechanism (6) includes: a first installation block (601) and a second installation block (602). There are two first installation blocks (601) and two second installation blocks (602) respectively. The two first installation blocks (601) and the two second installation blocks (602) are respectively fixedly connected to the outer walls of the filter (3) and the sputum collecting cylinder (4). A hook (603) is hinged between the two second installation blocks (602) through a pin shaft (605). A locking rod (604) is fixedly connected between the two first installation blocks (601). The hook (603) is clamped on the locking rod (604).

5. The negative pressure device for preventing liquid backflow according to claim 4, characterized in that: Two sets of the connection mechanisms (6) are provided and are symmetrically arranged on the front and back sides of the outer walls of the filter (3) and the sputum collecting cylinder (4).

6. The negative pressure device for preventing liquid backflow according to claim 1, characterized in that: The top of the sputum collecting cylinder (4) is inserted into the bottom of the filter (3). A sealing ring is arranged at the bottom of the filter (3).

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