Device capable of preventing negative pressure drainage air leakage

Abstract

The utility model relates to a device capable of preventing negative pressure drainage air leakage. The device comprises a support, an electric push rod, a valve seat and a valve element. The support is a transverse n-shaped frame, and an end plate connected with the open end of the support is arranged at the open end of the support. The front end of the valve seat is closed, the rear end of the valve seat is open, and a clamping groove communicated with the interior is formed in the middle of the valve seat. The rear end of the valve seat is connected with the end plate; the valve core is cylindrical and is movably arranged in the valve seat along the axial direction of the valve seat, and a strip-shaped convex edge is arranged at the front end of the valve core; the electric push rod is installed on the support, and the front end of the electric push rod is connected with the rear end of the valve element. And the valve core can be pushed to move back and forth along the valve seat. Through the action of the electric push rod, the drainage tube clamped in the clamping groove is pressed to be turned off, then the pressure of the negative pressure source is adjusted to be maximum, a cover and a bottle opening of a waste liquid bottle are sealed, the problem of air leakage is solved, and favorable conditions are created for smooth proceeding of subsequent drainage operations.

Description

Technical Field

[0001] The utility model relates to a mechanical and electrical structure, in particular to a device applied to negative pressure drainage, specifically a device capable of preventing air leakage in negative pressure drainage. Background Art

[0002] In clinical negative pressure drainage operations, a disposable waste liquid bag is often connected in series on the negative pressure pipeline to introduce the drained waste liquid into the waste liquid bag to avoid contamination of the negative pressure source. However, since most waste liquid bags are made of plastic film, they are easily deflated under negative pressure, affecting the operation. Therefore, the waste liquid bag needs to be placed in a rigid waste liquid bottle, and then the waste liquid bag and the waste liquid bottle are sealed simultaneously, and the same negative pressure as the drainage is input into the waste liquid bottle to ensure that the waste liquid bag will not deflate during the drainage operation. When the drainage is completed or the waste liquid bag is full, the waste liquid bag is taken out of the waste liquid bottle and replaced.

[0003] Currently, the bag mouth of a conventional waste liquid bag and the lid of the waste liquid bottle are integrated, and a snap-in groove structure is designed on the lid. During use, the waste liquid bag is placed in the waste liquid bottle, and the lid is snapped onto the mouth of the waste liquid bottle to seal the lid and the mouth of the waste liquid bottle. At the same time, the negative pressure pipe of the waste liquid bottle and the negative pressure pipe of the waste liquid bag are connected in parallel to the negative pressure source, and a drainage pipe is led out from the waste liquid bag and passed through the handle for drainage operation. However, due to the low precision of the contact surface between the snap-in groove and the bottle mouth, it is difficult to ensure the sealing performance, and air leakage is likely to occur, affecting the pressure of the drainage negative pressure, and further affecting the quality of the drainage operation.

[0004] Therefore, it is urgently needed to be improved to ensure the normal progress of the drainage operation. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a device capable of preventing air leakage in negative pressure drainage for the current air leakage problem encountered in drainage operations. It can quickly input a large negative pressure into the waste liquid bottle to instantaneously seal the lid of the waste liquid bottle, thereby effectively preventing air leakage at the lid of the waste liquid bottle and creating favorable conditions for the smooth progress of the drainage operation.

[0006] The technical solution of the utility model is as follows:

[0007] A device capable of preventing air leakage in negative pressure drainage includes

[0008] A bracket, which is a horizontally placed "door"-shaped frame, and its open end is provided with an end plate connected thereto; the end plate is disc-shaped; the bracket is located on the center line of the connecting block, and a through-hole-shaped mounting hole is provided at the center of its top edge;

[0009] The valve seat is cylindrical, with its front end closed and its rear end open. A clamping groove communicating with its interior is provided in the middle. The depth of the clamping groove is greater than the inner diameter of the valve seat, and its width is adapted to the outer diameter of the drainage tube, enabling the drainage tube to be movably clamped into the clamping groove. The rear end of the valve seat is connected to the end plate.

[0010] The valve core is cylindrical and is axially movably arranged in the valve seat. A strip-shaped convex rib is provided at its front end; and

[0011] The electric push rod is movably inserted into the installation hole. Its front end is connected to the rear end of the valve core and can push the valve core to move back and forth along the valve seat.

[0012] Furthermore, the cross-section of the convex rib is trapezoidal, its length is equivalent to the diameter of the valve core, and it is centered and perpendicular to the clamping groove.

[0013] Furthermore, a bottom groove is provided on the inner surface of the front end of the valve seat; the bottom groove is fitted with the convex rib.

[0014] Furthermore, the bottom of the clamping groove is circular, and its center is located on the perpendicular line of the axis of the valve seat.

[0015] Furthermore, a limit block and a limit switch are further included; the limit block is a T-shaped plate and is arranged between the electric push rod and the valve core. The two ends of its horizontal side are respectively close to the side edges of the bracket; the limit switches are two and are respectively arranged on different side edges of the bracket and are staggered with each other along the axis direction of the bracket.

[0016] Furthermore, the staggering distance between the two limit switches is equivalent to the distance between the convex rib and the bottom groove.

[0017] Furthermore, a connecting block is provided at the rear end of the valve core; the connecting block is cylindrical, its outer diameter is smaller than the outer diameter of the valve core, and it is connected to the electric push rod; the limit block is installed on the connecting block.

[0018] Furthermore, a flange is provided at the rear end of the valve seat; the size of the flange is adapted to the end plate and is connected to the end plate by bolts.

[0019] The beneficial effects of the present utility model:

[0020] The present utility model is reasonably designed, has a simple structure and is convenient to use. By the action of the electric push rod, the drainage tube clamped in the clamping groove can be pressed to be shut off. Then, after adjusting the pressure of the negative pressure source to the maximum, the negative pressure in the waste liquid bottle instantaneously increases, and a good seal is formed between the lid and the bottle mouth of the waste liquid bottle under the action of the negative pressure, effectively eliminating the air leakage problem. Subsequently, the drainage tube is loosened, and the negative pressure is adjusted to the surgical state. Thus, favorable conditions are created for the smooth progress of the drainage operation. Brief Description of the Drawings

[0021] Figure 1 is the explosion diagram of the present utility model.

[0022] Figure 2 is the external view diagram of the present utility model.

[0023] Figure 3 is the installation diagram of the waste liquid bottle and the waste liquid bag.

[0024] Wherein, 1 - electric push rod; 2 - bracket; 3 - limit switch; 4 - end plate; 5 - limit block; 6 - valve core; 7 - valve seat; 8 - card slot; 9 - bottom slot; 10 - convex rib; 11 - connecting block; 101 - waste liquid bag; 102 - waste liquid bottle; 103 - lid; 104 - drainage tube; 105 - negative pressure tube. Detailed Description of the Preferred Embodiment

[0025] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0026] As Figure 1 and 2 shown.

[0027] A device for preventing air leakage in negative pressure drainage includes an electric push rod 1, a bracket 2, a limit block 5, a limit switch 3, a connecting block 11, a valve core 6, a valve seat 7, etc.

[0028] The bracket 2 is a horizontally placed "door"-shaped frame, which is spliced by rectangular short plates. There is an installation hole in the shape of a through hole at the center of its top edge, and an end plate 4 connected thereto is provided at its open end. The end plate 4 is disc-shaped, and its center is located on the center line of the bracket 2.

[0029] The electric push rod 1 is installed through the installation hole from outside to inside and fixed on the top plate of the bracket 2.

[0030] The valve seat 7 is cylindrical, its front end is closed, its rear end is open, and a card slot 8 communicating with its interior is provided in the middle. The depth of the card slot 8 is greater than the inner diameter of the valve seat 7, its width is slightly smaller than the outer diameter of the negative pressure tube, and its bottom is circular. The center of the bottom is located on the perpendicular line of the axis of the valve seat 8, and its diameter is slightly larger than the outer diameter of the drainage tube. Thus, the drainage tube can be slightly deformed and then snapped into the card slot and restored to its original state at the bottom of the slot. Preferably, a flange is provided at the rear end of the valve seat 8. The size of the flange is adapted to the end plate 4 and can be connected to the end plate by bolts, which facilitates the connection and disassembly of the bracket and the valve seat.

[0031] The valve core 6 is cylindrical, and its diameter is slightly smaller than the inner diameter of the valve seat 7, so that it can be axially movably arranged in the valve seat 7 and can move in the valve seat 7.

[0032] A rib 10 is provided at the front end of the valve core 6. The rib 10 is in the shape of a strip block, with a trapezoidal cross-section. Its length is equivalent to the diameter of the valve core 6, and it is centered and perpendicular to the card slot 8. At the same time, a bottom groove 9 is provided on the inner surface of the front end of the valve seat 7. The bottom groove 9 is fitted with the rib 10 so that the two interact to squeeze the drainage tube and shut off the drainage tube.

[0033] The connecting block 11 is columnar, and its outer diameter is smaller than the outer diameter of the valve core 6. One end of the connecting block 11 is connected to the rear end of the valve core 6, and the other end is connected to the electric push rod 1, so that the valve core can move back and forth under the action of the electric push rod.

[0034] The limiting block 5 is in the shape of a T-shaped plate, and the length of its horizontal side is slightly smaller than the distance between the side edges of the bracket 2. The limiting block 5 is centered on the connecting block 11, so that both ends of its horizontal side are respectively close to the two side edges of the bracket.

[0035] There are two limit switches 3, which are respectively arranged on different side edges of the bracket 2, are staggered with each other along the axis direction of the bracket 2, and are respectively electrically connected to the controller. When the limiting block 11 moves back and forth, it approaches different limit switches 3 respectively, forming a forward push limit position and a backward limit position. The staggered distance between the limit switches 3 is equivalent to the distance between the rib 10 and the bottom groove 9, so that when the limiting block moves to the forward push limit position and the backward limit position, the corresponding limit switches can be triggered, so that the electric push rod stops operating, ensuring that when the valve core moves forward, it can be effectively pressed on the drainage tube, and when it moves backward, it can prevent excessive movement from damaging the device.

[0036] The working process of the present utility model is as follows:

[0037] First, the waste liquid bag 101 and the waste liquid bottle 102 are installed, as Figure 3As shown. At this time, the negative pressure tubes 105 of the waste liquid bottle 102 and the waste liquid bag 101 are connected in parallel and then connected to the negative pressure source, and the drainage tube 104 on the waste liquid bag 101 is connected to the operation handle. Then, the drainage tube 104 is clamped into the card slot until it reaches the bottom of the slot. Next, the electric push rod is started to move the valve core forward to the top push limit position, so that the drainage tube is fully tightened and shut off. Subsequently, the negative pressure controller on the negative pressure drainage main unit is adjusted to adjust the negative pressure output to the maximum and maintain it for about 20 seconds, so that both the waste liquid bottle and the waste liquid bag are filled with negative pressure and reach the maximum value, so that the lid 103 of the waste liquid bottle is effectively sealed with the mouth of the waste liquid bottle 102 under the action of negative pressure, ensuring that no air leakage will occur. Then, the electric push rod is started again to move the valve core backward to the backward limit position, fully open the drainage tube, and adjust the negative pressure controller of the main unit to adjust the negative pressure value to the surgical state for drainage operation. Thus, the utility model effectively solves the air leakage problem existing in the prior art and creates favorable conditions for the smooth progress of the drainage operation.

[0038] Parts not involved in the present utility model are the same as or can be implemented using the prior art.

Claims

1. A device capable of preventing air leakage in negative pressure drainage, characterized in that, Including a bracket, which is a horizontally placed "door"-shaped frame, and an end plate connected thereto is provided at its open end; the end plate is disc-shaped; the bracket is located on the center line of the end plate, and a through-hole-shaped mounting hole is provided at the center of its top edge; a valve seat, which is cylindrical, its front end is closed, its rear end is open, and a card slot communicating with its interior is provided in the middle; the depth of the card slot is greater than the inner diameter of the valve seat, and its width is adapted to the outer diameter of the negative pressure pipe, so that the negative pressure pipe can be movably clamped into the card slot; the rear end of the valve seat is connected to the end plate; a valve core, which is cylindrical and is axially movably arranged in the valve seat, and a strip-shaped convex rib is provided at its front end; and an electric push rod, which is movably inserted into the mounting hole, and its front end is connected to the rear end of the valve core, and can push the valve core to move back and forth along the valve seat.

2. The device for preventing air leakage of negative pressure drainage according to claim 1, wherein The cross section of the convex rib is trapezoidal, its length is equivalent to the diameter of the valve core, and it is centered and perpendicular to the card slot.

3. The device for preventing air leakage in negative pressure drainage according to claim 1, characterized in that, A bottom groove is provided on the inner surface of the front end of the valve seat; the bottom groove is fitted with the convex rib.

4. The device for preventing air leakage in negative pressure drainage according to claim 1, characterized in that, The bottom of the card slot is circular, and its center is located on the perpendicular line of the axis of the valve seat.

5. The device for preventing air leakage in negative pressure drainage according to claim 3, characterized in that, It further includes a limit block and a limit switch; the limit block is a T-shaped plate and is arranged between the electric push rod and the valve core, and both ends of its horizontal side are respectively close to the side edges of the bracket; there are two limit switches, which are respectively arranged on different side edges of the bracket and are staggered from each other along the axis direction of the bracket.

6. The device for preventing air leakage in negative pressure drainage according to claim 5, characterized in that, The staggered distance between the two limit switches is equivalent to the distance between the convex rib and the bottom groove.

7. The device for preventing air leakage in negative pressure drainage according to claim 5, wherein A connecting block is provided at the rear end of the valve core; the connecting block is cylindrical, its outer diameter is smaller than the outer diameter of the valve core, and it is connected to the electric push rod; the limit block is installed on the connecting block.

8. The device for preventing air leakage in negative pressure drainage according to claim 1, wherein A flange is provided at the rear end of the valve seat; the size of the flange is adapted to the end plate and is connected to the end plate by bolts.

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