CN112483668A

CN112483668A - Drainage tube connecting valve

Info

Publication number: CN112483668A
Application number: CN202011457450.5A
Authority: CN
Inventors: 万媛; 王莉; 张虹; 严白莉; 喻小红; 沈晶; 袁利玲; 陈满满; 姬静; 张萧; 胡一兰
Original assignee: Wuhan No1 Hospital
Current assignee: Wuhan No1 Hospital
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-03-12

Abstract

A drainage tube connection valve is used for connecting and controlling plastic hoses with a diameter of 4-25 mm, comprising an inlet tube, a channel tube and an outlet tube which are fixed as a whole and arranged in sequence; the channel tube is axially provided with a fixed channel portion and a movable channel in sequence. The fixed channel part is provided with an axially penetrating fixed channel, and the movable channel part is provided with a keyway that penetrates perpendicular to the axial direction. Active channel, the control key unlocks the output pipe when disconnecting the channel, locks the output pipe when connecting the channel, or is provided with independent easy-lock and easy-release interfaces. With the basic structure of the present invention, the channel can be completely turned off or turned on through the simple operation of the control key, and at the same time, the connection and disconnection of the drainage bag can be easily realized.

Description

Drainage tube connecting valve

Technical Field

The invention relates to medical equipment, in particular to a drainage tube connecting valve.

Background

Drainage or urination by placing a tube is the most common state of a patient after an operation, and drainage liquid can be continuously collected only by timely replacing or dumping the drainage liquid after the drainage liquid is collected by the drainage tube. In the process, the control of the turning-off and turning-on of the drainage tube in front of the drainage bag through the drainage tube connecting valve is the most frequently used operation, the turning-off and the separation of the drainage bag need to be completed, the drainage bag is connected and the connection operation is carried out after the drainage bag is replaced, the control process of the current drainage bag is complex, and the connection between the valve body and the drainage tube is not flexible enough.

Disclosure of Invention

The invention aims to solve the problems and provides a drainage tube connecting valve which can conveniently and quickly release a drainage bag while closing the valve, open a flow valve while connecting the drainage bag and realize convenient and quick pipeline connection.

In order to achieve the purpose, the invention adopts the following technical scheme:

the drainage tube connecting valve is used for connecting and controlling a plastic pipe with the diameter of 4-25 mm, and is characterized in that: comprises an inlet cylinder, a channel cylinder and an outlet cylinder which are fixed into a whole and arranged in sequence;

the inlet cylinder and the outlet cylinder are joints with circular sections, the channel cylinder is axially sequentially provided with a fixed channel part and a movable channel part, the fixed channel part is internally provided with an axially through fixed channel, the movable channel part is provided with a key groove which is perpendicular to the axial direction and is through, a control key is embedded in the key groove in a fitting manner, the control key can move along the guide direction of the key groove, two ends of the control key are respectively a locking end and a locking end, when the control key is in a completely opened state, the locking end moves close to the valve body, and when the control key is in a completely closed state, the locking end moves close to the valve body;

the middle part of the control key is provided with an axially through movable channel, the surface of the control key close to the fixed channel part is provided with a positioning bulge or a positioning groove, and the corresponding position of the attaching surface of the fixed channel part is provided with a matched positioning groove or positioning bulge; when the control key is in a complete turn-off state, the movable channel and the fixed channel are completely staggered and blocked, and when the control key is in a complete turn-on state, the movable channel and the fixed channel are in sealed butt joint communication.

Preferably, the surface that the fixed passage portion is pressed close to at the control key is equipped with the constant head tank, and the surface that the fixed passage portion pressed close to the control key is equipped with the location arch of elastic rubber, and the position of control key is in the state of shutting off completely, and the edge in the activity passageway is just in time got into to the location arch, is equipped with the guide slot to the activity passageway direction at the constant head tank of control key, and the guide slot is apart from activity passageway 0.1 ~ 0.3mm, and the degree of depth of guide slot is not more than the degree of depth.

Preferably, the stop end is vertically provided with a convex limit table, and when the limit table contacts the outer side wall of the valve body, the control key is in a complete turn-off state.

The lower terminal surface below of control key hasp end is equipped with the back hook integrative with the hasp end, and the plane shape of back hook is arc banding, and the back hook is perpendicular with the axle center of valve body, and the gib head points to the axle center of valve body.

Furthermore, an inner convex annular supporting ring is arranged at a position 0-4 mm below the control key of the outlet cylinder, and a stepped bearing platform with the lower end protruding towards the circle center is arranged on one side, close to the stop end, of the supporting ring; the backup ring sets up to the unsettled arc suspension ring in below near hasp end one side, and the radian of suspension ring is unanimous with the keyway radian of export section of thick bamboo wall department, and radial width is less than the radial width of returning the hook, and the below of suspension ring is equipped with the banding fretwork of arc, the height of fretwork and the highly uniform of cushion cap, and the both ends of suspension ring are integrative with the inside wall of an export section of thick bamboo.

Furthermore, a stop cylinder with the lower end embedded in the channel cylinder is arranged in the inlet cylinder, a stop hook is arranged at the upper end of the stop cylinder, the stop hook is provided with a locking surface inclining downwards from the top end to the inside and a guide surface inclining downwards to the outside, the lower end face of the stop hook below the locking surface is a horizontal stop surface, the vertical section of the stop hook is in an upward arrow shape, the minimum diameter of the locking surface is larger than the diameter of the upper end face of the fixed channel and is 1-2.5 mm smaller than the outer diameter of an input pipe used in a matching set, and the hardness of the stop hook is larger than Shore 90D.

Preferably, an unlocking cylinder is embedded between the guide surface and the inner side wall of the adjacent inlet cylinder, the outer side wall of the unlocking cylinder is attached to the inner side wall of the inlet cylinder, a gap of 1-5 mm is formed between the lower end of the unlocking cylinder and the fixed channel part, and the guide surface of the stop hook is embedded in the inner side wall of the unlocking cylinder; the part of the stopping cylinder above the channel cylinder is provided with a plurality of vertical gaps, so that when the unlocking cylinder is pushed downwards, the stopping hook is outwards inclined to unlock.

Preferably, the contact surface of the control key and the channel barrel is covered with a rubber sealing gasket.

As an embodiment, a section of second fixed channel part is further arranged below the movable channel part, a plane passing through a horizontal center line of the control key is taken as a symmetrical plane, and the structure of the second fixed channel part is symmetrical to the symmetrical plane of the fixed channel part.

The invention has the following beneficial effects: the basic structure of the present invention can realize complete turning off or on of the channel by simple operation of the control key.

In a preferable scheme or embodiment, the drainage device can connect and lock the output pipe while connecting the channel, quickly unlock the output pipe while closing the channel, conveniently remove the output pipe and the drainage bag connected with the output pipe, and conveniently pour drainage liquid or replace the drainage bag.

Furthermore, the quick connecting part is arranged at the inlet, so that the common infusion tube can be quickly and reliably inserted or unlocked, the insertion is convenient, the connecting tube only needs to be inserted into the inlet cylinder in a centering manner and directly inserted to the bottom, the connecting tube cannot be pulled out, when the connecting tube needs to be pulled out, the unlocking cylinder at the interface only needs to be pressed, the connecting tube does not have structural requirements, and the common tube is made of plastic.

As an embodiment, the quick connection parts can be used at the two ends of the valve body, and the connection and the action of the pipe body and the on/off valve are respectively completed without mutual influence.

Drawings

Figure 1 is a schematic view of the present invention in use,

figure 2 is a perspective view of the conducting state of the present invention,

figure 3 is a cross-sectional view a-a of figure 2,

figure 4 is a cross-sectional view of the closed state,

fig. 5 is a schematic structural diagram of the second embodiment of the present invention.

In the figure: 1-inlet tube, 2-connecting valve, 3-outlet tube, 4-drainage bag, 5-stop hook, 6-inlet tube, 7-positioning projection, 8-positioning groove, 9-key groove, 10-control key, 11-return hook, 12-fixed channel, 13-movable channel, 14-support ring, 15-outlet tube, 16-flange, 17-guide surface, 18-stop surface, 19-stop tube, 20-suspension ring, 21-channel tube, 22-fixed channel part, 23-movable channel part, 24-guide groove, 25-limit table, 26-stop end, 27-lock end, 28-support table, 29-gap, 30-unlock tube, 31-sealing pad, 32-lock surface, 33-second fixed channel part, 34-plane of symmetry.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, which are intended to illustrate only some, but not all, embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inside" or "outside" and the like indicate positional relationships based on application states or orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "provided", "connected" and "connected" are to be understood broadly, and may for example be fixedly connected, detachably connected or integrally connected; they may be connected directly or indirectly through intervening media, or may be connected internally to the elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figure 1, the drainage tube connecting valve is used for connecting a drainage tube 4, is connected in series with a plastic hose with the diameter of 4-25 mm, controls to connect or disconnect a drainage channel, and controls to connect or disconnect a drainage bag 4 so as to replace the drainage bag 4.

As shown in fig. 2-5, the drainage tube connection valve comprises an inlet tube 6, a channel tube 21 and an outlet tube 15 which are fixedly integrated and arranged in sequence. The inlet cylinder 6, the channel cylinder 21 and the outlet cylinder 15 are typically cylindrical, but may be other shapes with non-circular cross sections, and the actual functions are not affected by the uniform or non-uniform outer contours. Can be made of plastic or metal materials.

The inner walls of the inlet tube 6 and the outlet tube 15 are cylindrical interfaces, and the channel tube 21 is axially provided with a fixed channel part 22 and a movable channel part 23 in sequence, as shown in the embodiment shown in fig. 3, the fixed channel part 22 is arranged above the movable channel part 23 and is adjacent to the inlet tube 6, or arranged below and is adjacent to the outlet tube 15. The fixing passage portion 22 is provided with a fixing passage 12 penetrating in the axial direction.

The movable channel part 23 is provided with a key groove 9 which is perpendicular to the axial direction and penetrates through the side wall of the valve body, a control key 10 is embedded in the key groove 9 in a fitting manner, the length of the control key 10 which is perpendicular to the axial direction of the valve body is larger than the outer diameter of the valve body, and the control key can move along the direction guided by the key groove 9. The switching of the channel switch is realized by shifting the position. The control key 10 has two ends, a stopper end 26 and a locking end 27, respectively, the stopper end 26 being on the right side and the locking end 27 being on the left side as viewed in fig. 2-5. When the control key is in the fully open position, the locking end 27 moves closer to the valve body and the stop end 26 moves away from the valve body and is in the extreme position on the right side. When the control key is in the complete off state, the stop end 26 moves close to the valve body, the locking end 27 moves away from the valve body, and the control key is at the extreme position on the left side.

The middle part of the control key 10 is provided with an axially through movable channel 13, the surface of the control key 10 close to the fixed channel part 22 is provided with a positioning bulge 7 or a positioning groove 8, the corresponding position of the attaching surface of the fixed channel part 22 is provided with a matched positioning groove 8 or a matched positioning bulge 7, the completely opening state and the completely closing state refer to two specific states, and the positioning bulge 7 is embedded into the positioning groove 8 or positioned at the edge position in the movable channel in the two states. When the control key 10 is in a complete on or complete off state, the positioning bulge 7 is embedded into the positioning groove 8; when the control key 10 is in a complete off state, the movable channel 13 and the fixed channel 12 are completely staggered and blocked, and when the control key 10 is in an on state, the movable channel 13 and the fixed channel 12 are in sealed butt joint communication. In the embodiment of the figure, the positioning groove 8 is arranged on the surface of the control key 10 adjacent to the fixed channel part 22, the positioning protrusion 7 of the elastic rubber is arranged on the surface of the fixed channel part 22 adjacent to the control key 10, and when the position of the control key 10 is in the complete off state, as shown in fig. 4, the positioning protrusion 7 just enters the movable channel 13 and is in the edge position in the movable channel 13 along with the movement of the control key 10, and the complete off state can be determined from the operation feeling. The operation of detaching the drainage bag can be performed. Meanwhile, the positioning bulge 7 of the elastic rubber is automatically unfolded after not being pressed by the control key, so that the control key is prevented from moving back, the control key is kept at a complete turn-off position, and liquid leakage is avoided in the replacement process of the drainage bag. When the position of the control key 10 is in the fully open state, as shown in fig. 3, along with the movement of the control key 10, the positioning protrusion 7 just enters the positioning groove 8, and the fully open state can be determined from the operation feeling, so that the normal drainage process can be performed. Meanwhile, the positioning bulge 7 of the elastic rubber is automatically unfolded after not being pressed by the control key, so that the control key is prevented from moving, the control key is kept at a complete opening position, and the drainage bag is guaranteed not to be loosened.

In the moving process of the control key 10, in order to avoid the positioning protrusion 7 from causing a gap between the control key 10 and the fixed channel part 22, a guide groove 24 is arranged in the direction from the positioning groove 8 of the control key 10 to the movable channel 13, the positioning protrusion 7 is just completely embedded into the guide groove 24, the stopping end of the guide groove 24 is 0.1-0.3 mm away from the movable channel, and the stopping end of the guide groove 24 is isolated from the movable channel 13.

In order to ensure the sealing performance between the control key 10 and the fixed channel part 22, the contact surface between the control key 10 and the channel cylinder 21 is covered with a rubber sealing gasket 31.

The stop end 26 is provided with a convex limit platform 25 along the direction of the key slot 9, and when the limit platform 25 contacts the outer side wall of the valve body, the control key 10 is in a complete turn-off state.

In the first embodiment of the output pipe locking structure, as shown in fig. 3 and 4, a ring-shaped supporting ring 14 protruding inward in the axial direction is disposed at a position of the outlet cylinder 15 adjacent to the control key 10, and a stepped supporting platform 28 with a lower end protruding toward the center of a circle is disposed at a side of the supporting ring 14 close to the stopping end 26; the backup ring 14 and the bearing platform 28 are both arc-shaped. The supporting ring 14 is provided with an arc-shaped suspension ring 20 with a suspended lower part on one side close to the locking end 27, the radian of the suspension ring 20 is consistent with that of the key groove 9 at the wall of the outlet cylinder, the radial width of the suspension ring is smaller than that of the return hook 11, the height of the suspension ring 20 is consistent with that of the supporting ring 14, the suspended height is consistent with that of the bearing platform 28, and two ends of the suspension ring 20 are integrated with the inner side wall of the outlet cylinder 15.

The lower end face of the lock catch end 27 of the control key 10 is provided with a back hook 11, the planar shape of the back hook 11 is arc-shaped, the back hook 11 extends downwards, and the hook head points to the axis of the valve body. When the control key 10 is in the fully opened state of the valve body, the return hook 11 is just embedded into the suspension below the suspension ring 20. The function of this structure is to make the control key 10 in the fully open state of the valve body, the return hook 11 and the platform 28 fix the output pipe 3 below, and the control key itself is supported by the suspension ring 20 without tilting. In cooperation, the end of the lower outlet pipe 3 is provided with a radially outward protruding flange 16, the diameter of the flange 16 is just embedded into the groove above the return hook 11 and the bearing platform 28, and the diameter of the outlet pipe 3 is the distance between the end of the return hook 11 and the bearing platform 28 in the fully open state.

As a further input pipe interface structure, as shown in fig. 3 and 4, a stop cylinder 19 embedded at the upper end of a channel cylinder 21 is arranged in an inlet cylinder 6, a circle of stop hooks 5 is arranged at the upper end of the stop cylinder 19, the stop hooks 5 are provided with a locking surface 32 inclining downwards from the top end and a guide surface 17 inclining downwards outwards, the lower end surface of the stop hook 5 below the locking surface 32 is a horizontal stop surface 16, a sharp front edge is formed at the boundary of the guide surface 17 and the stop surface 16, the vertical section of the stop hook 5 is in an upward arrow head shape, the minimum diameter of the locking surface 32 is larger than the diameter of the upper end surface of the fixed channel 12, the stop hook 5 completely covers the upper end opening of the fixed channel 12, the minimum diameter of the locking surface 32 is 1-2.5 mm smaller than the outer diameter of an input pipe 1 used in a matching way, the hardness of the stop hook 5 is larger than shore 90D, the stop cylinder can be made of a metal material, and the wall thickness of the stop cylinder is 0, has elasticity. An unlocking cylinder 30 is embedded between the guide surface 17 and the inlet cylinder 6, the outer side wall of the unlocking cylinder 30 is attached to the inner side wall of the inlet cylinder 6, the guide surface 17 of the stop hook 5 is embedded into the inner side wall of the unlocking cylinder 30, and a gap of 1-5 mm is formed between the lower end of the unlocking cylinder 30 and the fixed channel part 22. The part of the stopping cylinder 19 above the channel cylinder 21 is provided with a plurality of vertical gaps 29. In cooperation, the outer diameter of the input tube 1 is 1-2.5 mm larger than the minimum diameter of the locking surface 32. Since the stop surface 16 is horizontally disposed so that the inner diameter of the stop surface 16 is the minimum in the horizontal state, the inner diameter of the stop surface 16 becomes large when the stop hook is inwardly inclined or outwardly inclined. When input tube 1 inserts, input tube 1 bulldozes downwards and compels hasp face 32, under the direction of hasp face 32 and the every one section elastic action of a locking section of thick bamboo, hasp face 32 has a down dip, the internal diameter grow, input tube 1 can be down, when input tube 1 stops down, the sharp-pointed juncture sharp edge of guide surface 17 and locking surface 16 forces the input tube to produce deformation and indent, sharp-pointed sharp edge embedding input tube 1 between guide surface 17 and the locking surface 16 for input tube 1 can't be extracted, extract more then the sharp-pointed edge embedding is deepened. When the lock release cylinder 30 is pressed down, the stopper hook 5 is tilted outward, and the inner end is raised, resulting in an increase in the minimum diameter of the lock surface 32. Because the sharp edge between the guide surface 17 and the stop surface 16 is arranged on the stage, the inner diameter is enlarged and is larger than the outer diameter of the input tube 1, the input tube is unlocked and can be pulled out, and the unlocking tube 30 is restored under the action of the restoring elasticity of the stop tube 19 after being pulled out. Therefore, the structure can perform the simplest plugging operation aiming at the most common plastic pipes, the lock catch is firm and reliable, the operation is convenient, and the help of any other structures and appliances is not needed.

As the second embodiment of the locking structure of the output pipe, the structure of the return hook 11, the support ring 11 and the bearing platform 28 are not used under the movable channel part 23, but a second fixed channel part 33 is provided, as shown in FIG. 5, a plane passing through the horizontal center line of the control key 10 is taken as a symmetrical plane 34, and the structure of the second fixed channel part 33 is symmetrical to the symmetrical plane 34 of the fixed channel part 22. In this way, the output pipe 3 can be connected and disconnected by simple plugging, so that the steps of opening and closing the valve and disconnecting the output pipe are completed in two steps, and the phenomenon of liquid leakage caused by unsmooth operation in the process of disconnecting the output pipe is avoided.

The above description includes the operation process, and in brief, the embodiment is that the connection and disconnection of the output tube 3 needs to be matched with the action of the control key 10, the control key 10 closes the channel and the output tube is disconnected, and at the moment, the drainage bag 4 can be taken down for replacement or dumping. The control key 10 opens the channel and locks the output pipe 3, it is necessary to put the flange 16 of the output pipe into the groove on the bearing platform 28, the other end is kept horizontal, and the channel is opened when the return hook 11 locks the flange and locks the output pipe.

In the second embodiment, the opening and closing channel is separated from the delivery tube without skilled operation, and the channel is closed first and then pushed into the unlocking cylinder of the lower second fixed channel part 33 to unlock the delivery tube 3 when the channel is separated from the drainage bag. When the drainage bag is connected, the output tube is inserted first, and after the output tube is inserted, the output tube is automatically locked, and then the control key is pushed to open the channel.

The output tube 3 is fixedly connected with the drainage bag 4.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes, modifications, equivalents, and improvements may be made without departing from the spirit and scope of the invention.

Claims

1. A drainage pipe connecting valve for connecting and controlling a plastic pipe with a diameter of 4 to 25 mm, characterized in that it comprises an inlet tube (6), a channel tube (21) and an outlet tube (15) which are fixed as a whole and arranged in sequence. ;

The inlet barrel (6) and the outlet barrel (15) are interfaces with circular cross-sections, and the channel barrel (21) is axially provided with a fixed channel portion (22) and a movable channel portion (23) in sequence, and the fixed channel A fixed channel (12) is provided in the axial through portion (22), and the movable channel portion (23) is provided with a key groove (9) perpendicular to the axial direction. The key groove (9) is fitted and embedded with the control key (10), The control key (10) can move along the guiding direction of the keyway (9). The two ends of the control key (10) are respectively a stop end (26) and a locking end (27). When the control key is in a fully open state, the locking end (27) Move closer to the valve body, when the control key is in a completely off state, the stop end (26) moves closer to the valve body;

The middle part of the control key (10) is provided with an axially penetrating movable channel (13), and a positioning protrusion (7) or a positioning groove (8) is provided on the surface of the control key (10) close to the fixed channel part (22). , the fitting surface of the fixed channel portion (22) is provided with a matching positioning groove (8) or positioning protrusion (7) at the corresponding position; when the control key (10) is in a completely off state, the movable channel (13) and the fixed The channel (12) is completely staggered and blocked, and when the control key (10) is in a fully open state, the movable channel (13) is in sealed butt-joint communication with the fixed channel (12).

2. The drainage pipe connecting valve according to claim 1, characterized in that: a positioning groove (8) is provided on the surface of the control key (10) close to the fixed channel portion (22), and the fixed channel portion (22) is close to the control key The surface of (10) is provided with a positioning protrusion (7) of elastic rubber. When the position of the control key (10) is in a completely off state, the positioning protrusion (7) just enters the edge of the movable channel (13). A guide groove (24) is provided in the direction from the positioning groove (8) of the control key (10) to the movable channel (13). greater than the depth of the positioning groove (8).

3. The drainage pipe connection valve according to claim 2, characterized in that: the stop end (26) is vertically provided with a protruding limit platform (25), and the limit platform (25) contacts the outside of the valve body When the wall is closed, the control key (10) is completely off.

4 . The drainage pipe connection valve according to claim 1 , wherein a return hook ( 11 ) integrated with the locking end ( 27 ) is provided below the lower end surface of the locking end ( 27 ) of the control key ( 10 ). 5 . ), the plane shape of the return hook (11) is an arc-shaped belt, the return hook (11) is perpendicular to the axis of the valve body, and the hook head points to the axis of the valve body.

5 . The drainage pipe connecting valve according to claim 4 , wherein the outlet tube ( 15 ) is provided with an inner convex annular support ring ( 14 ) at a position of 0-4 mm below the control key ( 10 ). 6 . The support ring (14) is arranged on the side close to the stop end (26) as a stepped bearing platform (28) whose lower end protrudes toward the center of the circle; the support ring (14) is arranged to be suspended downward on the side close to the locking end (27) The arc-shaped suspension ring (20) is the same as the radian of the keyway (9) at the wall of the outlet cylinder, and the radial width is smaller than the radial width of the return hook (11). The suspension ring (20) An arc-shaped band-shaped hollow is arranged below the bottom of the hollow ring, the height of the hollow is consistent with the height of the bearing platform (28), and the two ends of the suspended ring (20) are integrated with the inner side wall of the outlet cylinder (15).

6. The drainage pipe connection valve according to claim 1, characterized in that: a stopper cylinder (19) whose lower end is embedded in the passage cylinder (21) is provided in the inlet cylinder (6), and the stopper cylinder (19) A stop hook (5) is provided at the upper end of the stopper hook (5). The lower end surface of the stop hook (5) below the ) is a horizontal stop surface (16), so that the vertical section of the stop hook (5) is an upward arrow, and the minimum diameter of the locking surface (32) is larger than the fixed channel The diameter of the upper end face of (12) is 1-2.5mm smaller than the outer diameter of the input pipe (1) used, and the hardness of the stop hook (5) is greater than Shore 90D.

7. The drainage pipe connection valve according to claim 6, characterized in that: an unlocking cylinder (30) is embedded between the guide surface (17) and the inner wall of the adjacent inlet cylinder (6), and the unlocking cylinder (30) The outer side wall of the opening cylinder (6) is fitted with the inner side wall of the inlet cylinder (6), a gap of 1 to 5 mm is provided between the lower end of the unlocking cylinder (30) and the fixed channel part (22), and the guide surface (17) of the stop hook (5) is embedded in the inner side wall of the unlocking cylinder (30); the portion of the locking cylinder (19) above the channel cylinder (21) is provided with a plurality of vertical gaps (29), so that the unlocking cylinder (30) is pushed down When the locking hook (5) is tilted outwards to unlock.

8 . The drainage pipe connecting valve according to claim 1 , wherein the contact surface of the control key ( 10 ) and the channel cylinder ( 21 ) is covered with a rubber sealing gasket ( 31 ). 9 .

9. The drainage pipe connecting valve according to claim 6 or 7, characterized in that: a second fixed channel portion (33) is further provided below the movable channel portion (23) to pass through the control key (10). The plane of the horizontal midline of ) is the symmetry plane (34), and the structure of the second fixed channel part (33) is symmetrical with the fixed channel part (22) relative to the symmetry plane (34).