Negative pressure drainage tube device with metering function

Abstract

The invention relates to the field of drainage tubes, and particularly discloses a negative pressure drainage tube device with a metering function. By arranging the mounting plate, the supporting plate, the metering cylinder, the mounting ring, the telescopic cylinder and the mounting head, and arranging a manual operation assembly and a connecting guide pipe on the mounting head, during use, a user can support the supporting plate between the mounting plate and the mounting ring, and the metering cylinder is supported through the supporting plate; then the drainage tube and the negative pressure tube are respectively connected with the connecting guide tube, so that a negative pressure environment is generated in the metering cylinder and the telescopic cylinder, tissue fluid is sucked into the metering cylinder by utilizing the negative pressure environment, and as the metering cylinder is stably supported by the supporting plate, a user can accurately read the volume of the tissue fluid flowing into the metering cylinder through the scale marks.

Description

Technical Field

[0001] The present invention belongs to the technical field of drainage tubes, and particularly relates to a negative pressure drainage tube device with a metering function. Background Art

[0002] Drainage operation is one of the common treatment operations in medicine. The drainage operation drains the tissue fluid at the corresponding position to a designated device through a catheter. Generally, the drainage facilities are mainly drainage bags and drainage cylinders. The user drains the tissue fluid in the designated area into the drainage bag and drainage cylinder through the drainage tube. The drainage power of the drainage bag generally comes from gravity and tissue pressure, and the drainage speed is slow. While the drainage cylinder is generally connected to a negative pressure generating device, and a negative pressure environment is formed inside the drainage cylinder by the negative pressure generating device. The drainage cylinder sucks the tissue fluid in the corresponding area through the negative pressure environment and the drainage tube.

[0003] During the application process, the applicant found that both the drainage bag and the drainage cylinder have defects in the use process. The overall plastic strength of the drainage bag is relatively low. Although there are scale lines on some drainage bags, as the shape of the drainage bag changes, the user cannot accurately obtain the volume of the drained fluid through the scale lines. Similarly, although there are scale lines printed on the surface of some drainage cylinders, the drainage cylinder will change in shape during the negative pressure operation, which is also not conducive to the user to check the volume of the drained fluid. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a negative pressure drainage tube device with a metering function to solve the problem that the existing drainage equipment cannot accurately judge the volume of the drained fluid.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A negative pressure drainage tube device with a metering function, comprising:

[0007] A mounting plate, the bottom of the mounting plate is snap-connected with a support plate;

[0008] A metering cylinder, the metering cylinder is connected to the mounting plate, the metering cylinder is provided with scale lines, and one end of the metering cylinder away from the mounting plate is connected with a mounting ring, and a positioning groove for snap-connecting the end of the support plate is provided on the mounting ring;

[0009] A telescopic cylinder, the telescopic cylinder is connected to the mounting ring;

[0010] A mounting head, the mounting head is connected to the telescopic cylinder, and a manual operation component and two connecting drainage tubes are connected to the mounting head.

[0011] Preferably, a clamping groove is formed at the bottom of the mounting plate. A first end groove communicating with one end of the clamping groove is formed on the lower surface of the mounting plate. A second end groove communicating with the other end of the clamping groove is formed on the upper surface of the mounting plate. A third end groove communicating with the clamping groove is formed at the bottom of the mounting plate. One end of the support plate is connected with a first short rod, and the other end of the support plate is connected with a second short rod.

[0012] Preferably, the idle state of the measuring cylinder is configured as follows: the first short rod is clamped inside the first end groove, and the second short rod is clamped inside the second end groove;

[0013] The acquisition state of the measuring cylinder is configured as follows: the first short rod is clamped inside the third end groove, and the second short rod is clamped inside the positioning groove.

[0014] Preferably, the distance between the third end groove and the axis of the measuring cylinder is greater than the distance between the positioning groove and the axis of the measuring cylinder.

[0015] Preferably, the measuring cylinder is made of transparent plastic.

[0016] Preferably, the manual operation component includes a mounting block connected to the mounting head. An exhaust pipe and a drainage pipe are connected to the mounting block. Two flow channels are formed inside the mounting block. One flow channel communicates the exhaust pipe with the telescopic cylinder, and this flow channel is unidirectionally opened from the telescopic cylinder to the exhaust pipe. The other flow channel communicates the drainage pipe with the telescopic cylinder, and this flow channel is unidirectionally opened from the drainage pipe to the telescopic cylinder.

[0017] Preferably, a variable connection channel is arranged in the flow channel, and a blocking block is clamped in the variable connection channel. Both the variable connection channel and the blocking block are arranged in a frustum shape. The large end of the variable connection channel and the blocking block corresponding to the exhaust pipe in the flow channel faces the exhaust pipe and the small end faces the telescopic cylinder. The large end of the variable connection channel and the blocking block corresponding to the drainage pipe in the flow channel faces the telescopic cylinder and the small end faces the drainage pipe.

[0018] Preferably, the inner diameter of the variable connection channel is smaller than the inner diameter of the flow channel, and the diameter of the large end of the blocking block is smaller than the inner diameter of the flow channel.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In the present invention, by providing a mounting plate, a support plate, a measuring cylinder, a mounting ring, a telescopic cylinder and a mounting head, and simultaneously providing a manual operation component and a connecting conduit on the mounting head, during use, the user can support the support plate between the mounting plate and the mounting ring, support the measuring cylinder through the support plate, and then connect the drainage pipe and the negative pressure pipe to the connecting conduit respectively, thereby creating a negative pressure environment inside the measuring cylinder and the telescopic cylinder. The tissue fluid is sucked into the measuring cylinder by using the negative pressure environment. Since the measuring cylinder is stably supported by the support plate, the user can accurately read the volume of the tissue fluid flowing into the measuring cylinder through the scale line;

[0021] When the negative pressure generator is damaged or other reasons cause the negative pressure environment to not be automatically formed, the user can create an intermittent negative pressure environment in the measuring cylinder and the telescopic cylinder through the manual operation component. By manually forming a negative pressure environment that can be drained, it helps to expand the scope of use of the drainage pipe device and is no longer restricted to using a negative pressure generating device for drainage. Description of the Drawings

[0022] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 ;

[0023] Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ;

[0024] Figure 3 For the present invention Figure 2 Enlarged view of part A;

[0025] Figure 4 Schematic diagram of the overall structure of the present invention Figure 3 ;

[0026] Figure 5 Schematic diagram of the overall sectional structure of the present invention;

[0027] Figure 6 Schematic diagram of the sectional structure of the manual operation component of the present invention;

[0028] In the figure: 1, mounting plate; 2, measuring cylinder; 3, mounting ring; 31, positioning groove; 4, telescopic cylinder; 5, mounting head; 6, connecting conduit; 7, mounting block; 8, exhaust pipe; 9, drainage pipe; 10, flow channel; 11, variable connecting channel; 12, blocking block; 13, card slot; 14, first end slot; 15, second end slot; 16, third end slot; 17, support plate; 18, first short rod; 19, second short rod. Detailed Description of the Invention

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] Please refer to Figure 1 - Figure 6 As shown in the figure, a negative pressure drainage tube device with a metering function includes:

[0032] A mounting plate 1, and a support plate 17 is snap-fitted to the bottom of the mounting plate 1;

[0033] A metering cylinder 2, which is connected to the mounting plate 1. Scale lines are provided on the metering cylinder 2, and one end of the metering cylinder 2 away from the mounting plate 1 is connected to a mounting ring 3. A positioning groove 31 for snap-fitting the end of the support plate 17 is provided on the mounting ring 3;

[0034] A telescopic cylinder 4, which is connected to the mounting ring 3;

[0035] A mounting head 5, which is connected to the telescopic cylinder 4. A manual operation component and two connecting drainage tubes 6 are connected to the mounting head 5.

[0036] As can be seen from the above, the present invention is provided with a mounting plate 1, a support plate 17, a metering cylinder 2, a mounting ring 3, a telescopic cylinder 4 and a mounting head 5. At the same time, a manual operation component and connecting drainage tubes 6 are provided on the mounting head 5. During use, the user can support the support plate 17 between the mounting plate 1 and the mounting ring 3, support the metering cylinder 2 through the support plate 17, and then connect the drainage tube and the negative pressure tube to the connecting drainage tubes 6 respectively, so as to generate a negative pressure environment inside the metering cylinder 2 and the telescopic cylinder 4. The tissue fluid is sucked into the metering cylinder 2 by using the negative pressure environment. Since the metering cylinder 2 is stably supported by the support plate 17, the user can accurately read the volume of the tissue fluid flowing into the metering cylinder 2 through the scale lines;

[0037] When the negative pressure generator is damaged or other reasons cause the negative pressure environment to not be automatically formed, the user can form an intermittent negative pressure environment in the metering cylinder 2 and the telescopic cylinder 4 through the manual operation component. The negative pressure environment that can be drained is formed through manual operation, which helps to expand the use range of the drainage tube device and is no longer limited to using a negative pressure generating device for drainage.

[0038] Please refer to Figure 2 - Figure 5As shown, a card slot 13 is provided at the bottom of the mounting plate 1. A first end slot 14 communicating with one end of the card slot 13 is provided on the lower surface of the mounting plate 1. A second end slot 15 communicating with the other end of the card slot 13 is provided on the upper surface of the mounting plate 1. A third end slot 16 communicating with the card slot 13 is provided at the bottom of the mounting plate 1. One end of the support plate 17 is connected with a first short rod 18, and the other end of the support plate 17 is connected with a second short rod 19.

[0039] The idle state configuration of the measuring cylinder 2 is as follows: the first short rod 18 is clamped inside the first end slot 14, and the second short rod 19 is clamped inside the second end slot 15. At this time, the entire support plate 17 is clamped at the bottom of the mounting plate 1, and only one end of the second short rod 19 is clamped inside the second end slot 15.

[0040] The acquisition state configuration of the measuring cylinder 2 is as follows: the first short rod 18 is clamped inside the third end slot 16, and the second short rod 19 is clamped inside the positioning slot 31. The positioning slot 31 can be set deeper, which can completely clamp the second short rod 19 and part of the support plate 17. At this time, the support plate 17 can stably support between the mounting plate 1 and the mounting ring 3, so that the mounting plate 1, the support plate 17 and the mounting ring 3 form a stable framework to support the measuring cylinder 2, facilitating the user to read the volume of the drainage fluid flowing into the measuring cylinder 2.

[0041] Please refer to Figure 5 As shown, the distance between the third end slot 16 and the axis of the measuring cylinder 2 is greater than the distance between the positioning slot 31 and the axis of the measuring cylinder 2. When the support plate 17 supports between the mounting plate 1 and the mounting ring 3, one end of the support plate 17 will be inserted into the positioning slot 31. At this time, the support plate 17 is inclined. Multiple support plates 17 are used in cooperation to form a cone to bear the gravity, which can enhance the bearing capacity of the support plate 17.

[0042] To facilitate the user to read the volume of the drainage fluid in the measuring cylinder 2, the measuring cylinder 2 is made of transparent plastic material.

[0043] Please refer to Figure 1 and Figure 6 As shown, the manual operation component includes a mounting block 7 connected to the mounting head 5. An exhaust pipe 8 and a drainage pipe 9 are connected to the mounting block 7. Two flow channels 10 are provided inside the mounting block 7. One flow channel 10 communicates the exhaust pipe 8 with the telescopic cylinder 4, and this flow channel 10 is unidirectionally opened from the telescopic cylinder 4 to the exhaust pipe 8. The other flow channel 10 communicates the drainage pipe 9 with the telescopic cylinder 4, and this flow channel 10 is unidirectionally opened from the drainage pipe 9 to the telescopic cylinder 4.

[0044] A variable connection channel 11 is provided in the flow channel 10, and a plug 12 is clamped in the variable connection channel 11. Both the variable connection channel 11 and the plug 12 are arranged in a frustum of a cone shape, and the large ends of the variable connection channel 11 and the plug 12 in the flow channel 10 face the exhaust pipe 8, and the small ends face the telescopic cylinder 4. The large ends of the variable connection channel 11 and the plug 12 in the flow channel 10 corresponding to the drainage pipe 9 face the telescopic cylinder 4, and the small ends face the drainage pipe 9.

[0045] The inner diameter of the variable connection channel 11 is smaller than the inner diameter of the flow channel 10, and the diameter of the large end of the plug 12 is smaller than the inner diameter of the flow channel 10. The end of the plug 12 can move out of the variable connection channel 11 and into the flow channel 10. At this time, a gap appears between the plug 12 and the variable connection channel 11, allowing gas or drainage fluid to flow through.

[0046] As can be seen from the above, when the negative pressure generating device cannot be used, the user needs to rely on the manual operation component and the telescopic cylinder 4 to manually create a negative pressure environment. At this time, the operator can connect the operation pipe to the drainage pipe 9, and then manually press and pull the telescopic cylinder 4. When the user presses the telescopic cylinder 4 downward, the plug 12 corresponding to the drainage pipe 9 in the flow channel 10 blocks the variable connection channel 11 under the action of air pressure. At this time, the plug 12 corresponding to the exhaust pipe 8 in the flow channel 10 leaves the variable connection channel 11 under the action of air pressure. At this time, the gas in the telescopic cylinder 4 flows out through the exhaust pipe 8. When the user stretches the telescopic cylinder 4 upward, causing the volume of the telescopic cylinder 4 to expand, the plug 12 corresponding to the drainage pipe 9 in the flow channel 10 leaves the variable connection channel 11 under the action of air pressure, and the plug 12 corresponding to the exhaust pipe 8 in the flow channel 10 blocks the variable connection channel 11 under the action of air pressure. At this time, the air and drainage fluid at the end of the drainage pipe 9 flow into the telescopic cylinder 4 and the metering cylinder 2 through the drainage pipe 9.

[0047] Embodiment 2:

[0048] Please refer to Figure 1 - Figure 6 As shown, a negative pressure drainage tube device with a metering function includes:

[0049] A mounting plate 1, and a support plate 17 is clamped at the bottom of the mounting plate 1;

[0050] A metering cylinder 2, which is connected to the mounting plate 1. Scale lines are provided on the metering cylinder 2, and a mounting ring 3 is connected to the end of the metering cylinder 2 away from the mounting plate 1. A positioning groove 31 for clamping the end of the support plate 17 is provided on the mounting ring 3;

[0051] A telescopic cylinder 4, which is connected to the mounting ring 3;

[0052] The mounting head 5 is connected to the telescopic cylinder 4, and a manual operation component and two connecting pipes 6 are connected to the mounting head 5.

[0053] As can be seen from the above, by setting the mounting plate 1, the support plate 17, the metering cylinder 2, the mounting ring 3, the telescopic cylinder 4 and the mounting head 5, and at the same time setting the manual operation component and the connecting pipe 6 on the mounting head 5, during use, the user can support the support plate 17 between the mounting plate 1 and the mounting ring 3, support the metering cylinder 2 through the support plate 17, and then connect the drainage pipe and the negative pressure pipe to the connecting pipe 6 respectively, so as to create a negative pressure environment inside the metering cylinder 2 and the telescopic cylinder 4. Using the negative pressure environment to suck the tissue fluid into the metering cylinder 2. Since the metering cylinder 2 is stably supported by the support plate 17, the user can accurately read the volume of the tissue fluid flowing into the metering cylinder 2 through the scale line.

[0054] When the negative pressure generator is damaged or other reasons cause the negative pressure environment to not be automatically formed, the user can form an intermittent negative pressure environment in the metering cylinder 2 and the telescopic cylinder 4 through the manual operation component, and form a drainable negative pressure environment through manual operation, which helps to expand the use range of the drainage pipe device and is no longer limited to using the negative pressure generating device for drainage.

[0055] Please refer to Figure 2 - Figure 5 As shown, a card slot 13 is opened at the bottom of the mounting plate 1, a first end slot 14 communicating with one end of the card slot 13 is opened on the lower surface of the mounting plate 1, a second end slot 15 communicating with the other end of the card slot 13 is opened on the upper surface of the mounting plate 1, and a third end slot 16 communicating with the card slot 13 is opened at the bottom of the mounting plate 1. One end of the support plate 17 is connected with a first short rod 18, and the other end of the support plate 17 is connected with a second short rod 19.

[0056] The idle state configuration of the metering cylinder 2 is: the first short rod 18 is clamped inside the first end slot 14, the second short rod 19 is clamped inside the second end slot 15. At this time, the whole support plate 17 is clamped at the bottom of the mounting plate 1, and only one end of the second short rod 19 is clamped inside the second end slot 15.

[0057] The acquisition state configuration of the metering cylinder 2 is: the first short rod 18 is clamped inside the third end slot 16, the second short rod 19 is clamped inside the positioning slot 31. The positioning slot 31 can be set deeper to completely clamp the second short rod 19 and part of the support plate 17. At this time, the support plate 17 can stably support between the mounting plate 1 and the mounting ring 3, so that the mounting plate 1, the support plate 17 and the mounting ring 3 form a stable framework to support the metering cylinder 2, facilitating the user to read the volume of the drainage fluid flowing into the metering cylinder 2.

[0058] Please refer to Figure 1 and Figure 6 As shown, the manual operation component includes a mounting block 7 connected to the mounting head 5. An exhaust pipe 8 and a drainage pipe 9 are connected to the mounting block 7. Two flow channels 10 are formed inside the mounting block 7. One flow channel 10 connects the exhaust pipe 8 and the telescopic cylinder 4, and this flow channel 10 is unidirectionally opened from the telescopic cylinder 4 to the exhaust pipe 8. The other flow channel 10 connects the drainage pipe 9 and the telescopic cylinder 4, and this flow channel 10 is unidirectionally opened from the drainage pipe 9 to the telescopic cylinder 4.

[0059] A variable connection channel 11 is arranged in the flow channel 10, and a blocking block 12 is clamped in the variable connection channel 11. Both the variable connection channel 11 and the blocking block 12 are arranged in a frustum shape. The large end of the variable connection channel 11 and the blocking block 12 corresponding to the exhaust pipe 8 in the flow channel 10 faces the exhaust pipe 8, and the small end faces the telescopic cylinder 4. The large end of the variable connection channel 11 and the blocking block 12 corresponding to the drainage pipe 9 in the flow channel 10 faces the telescopic cylinder 4, and the small end faces the drainage pipe 9.

[0060] The inner diameter of the variable connection channel 11 is smaller than the inner diameter of the flow channel 10, and the diameter of the large end of the blocking block 12 is smaller than the inner diameter of the flow channel 10. The end of the blocking block 12 can move out of the variable connection channel 11 into the flow channel 10. At this time, a gap appears between the blocking block 12 and the variable connection channel 11, allowing gas or drainage fluid to flow through.

[0061] As can be seen from the above, when the negative pressure generating device cannot be used, the user needs to rely on the manual operation component and the telescopic cylinder 4 to manually form a negative pressure environment. At this time, the operator can connect the operation pipe to the drainage pipe 9, and then manually press and pull the telescopic cylinder 4. When the user presses the telescopic cylinder 4 downward, the blocking block 12 corresponding to the drainage pipe 9 in the flow channel 10 blocks the variable connection channel 11 under the action of air pressure. At this time, the blocking block 12 corresponding to the exhaust pipe 8 in the flow channel 10 leaves the variable connection channel 11 under the action of air pressure. At this time, the gas in the telescopic cylinder 4 flows out from the exhaust pipe 8. When the user stretches the telescopic cylinder 4 upward, causing the volume of the telescopic cylinder 4 to expand, the blocking block 12 corresponding to the drainage pipe 9 in the flow channel 10 leaves the variable connection channel 11 under the action of air pressure, and the blocking block 12 corresponding to the exhaust pipe 8 in the flow channel 10 blocks the variable connection channel 11 under the action of air pressure. At this time, the air and drainage fluid at the end of the drainage pipe 9 flow into the telescopic cylinder 4 and the metering cylinder 2 through the drainage pipe 9.

[0062] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0063] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0065] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A negative pressure drainage tube device with a metering function, characterized in that, Comprising: A mounting plate (1), with a support plate (17) snap - connected to the bottom of the mounting plate (1); A measuring cylinder (2), which is connected to the mounting plate (1). Scale lines are provided on the measuring cylinder (2), and a mounting ring (3) is connected to the end of the measuring cylinder (2) away from the mounting plate (1). A positioning groove (31) for the end of the support plate (17) to be snap - connected is provided on the mounting ring (3); A telescopic cylinder (4), which is connected to the mounting ring (3); A mounting head (5), which is connected to the telescopic cylinder (4). A manual operation component and two connecting pipes (6) are connected to the mounting head (5).

2. The negative pressure drainage tube device with a metering function according to claim 1, characterized in that: A clamping groove (13) is provided at the bottom of the mounting plate (1). A first end groove (14) communicating with one end of the clamping groove (13) is provided on the lower surface of the mounting plate (1). A second end groove (15) communicating with the other end of the clamping groove (13) is provided on the upper surface of the mounting plate (1). A third end groove (16) communicating with the clamping groove (13) is provided at the bottom of the mounting plate (1). A first short rod (18) is connected to one end of the support plate (17), and a second short rod (19) is connected to the other end of the support plate (17).

3. The negative pressure drainage tube device with a measuring function according to claim 2, characterized in that: In the idle state of the measuring cylinder (2): the first short rod (18) is snap - connected inside the first end groove (14), and the second short rod (19) is snap - connected inside the second end groove (15); In the collection state of the measuring cylinder (2): the first short rod (18) is snap - connected inside the third end groove (16), and the second short rod (19) is snap - connected inside the positioning groove (31).

4. A negative pressure drainage tube device with a metering function according to claim 3, characterized in that: The distance between the third end groove (16) and the axis of the measuring cylinder (2) is greater than the distance between the positioning groove (31) and the axis of the measuring cylinder (2).

5. A negative pressure drainage tube device with a metering function according to claim 1, characterized in that: The measuring cylinder (2) is made of transparent plastic material.

6. The negative pressure drainage tube device with a metering function according to claim 1, characterized in that: The manual operation component includes a mounting block (7) connected to the mounting head (5). An exhaust pipe (8) and a drainage pipe (9) are connected to the mounting block (7). Two flow channels (10) are provided inside the mounting block (7). One flow channel (10) connects the exhaust pipe (8) and the telescopic cylinder (4), and this flow channel (10) is unidirectionally open from the telescopic cylinder (4) to the exhaust pipe (8). The other flow channel (10) connects the drainage pipe (9) and the telescopic cylinder (4), and this flow channel (10) is unidirectionally open from the drainage pipe (9) to the telescopic cylinder (4).

7. A negative pressure drainage tube device with a metering function according to claim 6, characterized in that: A variable connection channel (11) is provided in the flow channel (10), and a blocking block (12) is clamped in the variable connection channel (11). Both the variable connection channel (11) and the blocking block (12) are arranged in a frustum shape. The large end of the variable connection channel (11) and the blocking block (12) in the flow channel (10) faces the exhaust pipe (8), and the small end faces the telescopic cylinder (4). The large end of the variable connection channel (11) and the blocking block (12) in the flow channel (10) corresponding to the drainage pipe (9) faces the telescopic cylinder (4), and the small end faces the drainage pipe (9).

8. A negative pressure drainage tube device with a metering function according to claim 7, characterized in that: The inner diameter of the variable connection channel (11) is smaller than the inner diameter of the flow channel (10), and the diameter of the large end of the blocking block (12) is smaller than the inner diameter of the flow channel (10).

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