阅读说明：本技术 一种管道阀门开关和应用其的管道阀门以及管道 (Pipeline valve switch and pipeline valve and pipeline using same ) 是由 杨青青 鞠庆玲 邓世杰 于 2020-05-28 设计创作，主要内容包括：本发明属于管道阀门技术领域,公开了一种管道阀门开关和应用其的管道阀门以及管道。本发明的管道阀门开关包括用于与阀门的阀板相连的驱动部件和与驱动部件相连的牵引装置,其中,阀板具有最大开启位置和关闭位置,牵引装置能够带动驱动部件旋转并固定,以带动阀板在关闭位置与最大开启位置之间旋转并固定。本发明的管道阀门开关能够确保操作人员启闭管道阀门的安全,同时更具经济性。(The invention belongs to the technical field of pipeline valves, and discloses a pipeline valve switch, a pipeline valve using the pipeline valve switch and a pipeline. The pipeline valve switch comprises a driving part connected with a valve plate of the valve and a traction device connected with the driving part, wherein the valve plate is provided with a maximum opening position and a maximum closing position, and the traction device can drive the driving part to rotate and fix so as to drive the valve plate to rotate and fix between the closing position and the maximum opening position. The pipeline valve switch can ensure the safety of opening and closing the pipeline valve by operators and has better economical efficiency.)

1. A pipeline valve switch is characterized by comprising a driving part and a traction device, wherein the driving part is used for being connected with a valve plate of a valve, the traction device is connected with the driving part, the valve plate is provided with a maximum opening position and a maximum closing position, and the traction device can drive the driving part to rotate and fix so as to drive the valve plate to rotate and fix between the closing position and the maximum opening position.

2. The pipeline valve switch of claim 1, wherein the pulling mechanism comprises a first pulling member coupled to the driving member for pulling the driving member to move the valve from the closed position toward the maximum open position, and a second pulling member coupled to the driving member for pulling the driving member to move the valve from the maximum open position toward the closed position.

3. The plumbing valve switch of claim 2, wherein the first pulling assembly comprises a first pulling cord connected to the drive member and a first hand-operated device connected to the first pulling cord, the second pulling member comprises a second pulling cord connected to the drive member and a second hand-operated device connected to the second pulling cord, and the first hand-operated device and the second hand-operated device are each connected to an external stationary base.

4. The pipeline valve switch of claim 1, wherein the pulling mechanism comprises a pull cord coupled to the drive member and a hand crank coupled to the pull cord, and a resilient return mechanism, wherein the resilient return mechanism is coupled between the drive member and the closed position such that when the hand crank is rotated to stretch the pull cord such that the drive member moves the valve from the closed position toward the maximum open position, the resilient return mechanism is stretched, and when the hand crank is rotated in a reverse direction to release the pull cord, the resilient return mechanism is returned to move the valve from the maximum open position toward the closed position.

5. The pipeline valve switch of claim 4 wherein the resilient return means is a spring connected between the drive member and the closed position.

6. A pipeline valve comprising a cylindrical housing open at both ends and a valve plate located within the cylindrical housing, and a pipeline valve switch according to any one of claims 1 to 5 connected to the valve plate, wherein the drive member is located on an outer wall of the cylindrical housing.

7. The pipe valve of claim 6, wherein the outer wall of the cylindrical housing further defines a first stop pin for defining the maximum open position and a second stop pin for defining the closed position, and wherein the drive member includes a shaft connected to the valve plate and a stop rod connected to the shaft, the stop rod being configured to be movable within a range defined by the first stop pin and the second stop pin under the action of the traction device.

8. The line valve of claim 7, wherein a line between the axial center of the rotating shaft of the driving member and the axial center of the first stop pin coincides with the axis of the cylindrical housing, and a line between the axial center of the rotating shaft of the driving member and the axial center of the second stop pin is perpendicular to the axis of the cylindrical housing.

9. The plumbing valve of any one of claims 6 to 8, wherein a steering member is further formed on the housing for changing a direction of transmission of a pull-cord of the pulling device.

10. A pipeline comprising a first section and a second section secured to a fixed base by a bracket, and a pipeline valve according to any of claims 6 to 9 in sealed communication between the first and second sections, wherein the pulling means is connected at one end to the actuating member and at the other end to the bracket.

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a pipeline valve switch, a pipeline valve using the pipeline valve switch and a pipeline.

Background

The air valve (i.e. air volume regulating valve) is an indispensable fitting in ventilation, air conditioning and air purification engineering of industrial factory buildings and civil buildings, is generally used in a pipeline of a ventilation system, is used for regulating the air volume of a branch pipe, and can also be used for mixed regulation of fresh air and return air.

For pipeline valves with installation heights greater than the height that an operator can operate standing on the ground, the following two types of air valves are mainly used at present:

(1) and the manual valve needs an operator to put up a scaffold or use a ladder to manually adjust the opening and closing of the air valve. When operating personnel works at a high place, the operating personnel need to wear the safety rope when the height from the ground is more than 2 meters according to the standard requirement. Therefore, the manual valve is complex to open and close, and the danger of falling is caused by high-altitude operation, so that the life health of a human body is easily threatened.

(2) Electric valve, accessible control electrical switch this moment realizes opening and shutting of blast gate, and convenient operation nevertheless also has following shortcoming: the electric valve is provided with an air valve actuator besides the valve body, so that the setting cost of the electric valve is high; in the environment with large area and more valves (in the process, the valves do not need to participate in the working condition of electrical control), if the air valves need to be opened occasionally, the electrical control and installation cost is higher; if the electric valve is adopted, the electric power, the electric capacity and the electric cost during operation are increased.

Disclosure of Invention

In order to ensure the safety and the economical efficiency of opening and closing the pipeline valve by operators, the invention provides a pipeline valve switch, a pipeline valve using the pipeline valve switch and a pipeline.

The pipeline valve switch comprises a driving part and a traction device, wherein the driving part is connected with a valve plate of the valve, the traction device is connected with the driving part, the valve plate is provided with a maximum opening position and a closing position, and the traction device can drive the driving part to rotate and be fixed so as to drive the valve plate to rotate and be fixed between the closing position and the maximum opening position.

Furthermore, the traction device comprises a first traction assembly connected with the driving part and a second traction assembly connected with the driving part, the first traction assembly is used for drawing the driving part to drive the valve to move from the closing position to the maximum opening position, and the second traction assembly is used for drawing the driving part to drive the valve to move from the maximum opening position to the closing position.

Further, the first traction assembly comprises a first traction rope connected with the driving part and a first manual device connected with the first traction rope, the second traction part comprises a second traction rope connected with the driving part and a second manual device connected with the second traction rope, and the first manual device and the second manual device are both connected with the external fixed foundation.

Preferably, the first hand-shaking device and the second hand-shaking device both have a self-locking function.

Further, draw gear includes the haulage rope that links to each other with drive component and the hand cranking device that links to each other with the haulage rope to and elasticity resetting means, wherein, elasticity resetting means connects between drive component and closed position, thereby rotate in order tensile haulage rope when the hand cranking device, make drive component drive valve from the closed position when the position moves towards the maximum open position, elasticity resetting means is stretched, and when the hand cranking device antiport with the release haulage rope, elasticity resetting means resets and moves from the maximum open position towards the closed position with driving the valve.

In addition, the elastic resetting device can also be connected between the driving part and the maximum opening position, so that when the hand cranking device rotates to stretch the traction rope, the driving part drives the valve to move from the maximum opening position to the closing position, the elastic resetting device is stretched, and when the hand cranking device rotates reversely to release the traction rope, the elastic resetting device resets to drive the valve to move from the closing position to the maximum opening position.

Further, the elastic return means is a spring connected between the drive member and the closed position.

The invention also provides a pipeline valve, which comprises a cylindrical shell with two open ends, a valve plate positioned in the cylindrical shell, and a pipeline valve switch connected with the valve plate, wherein the driving part is positioned on the outer wall of the cylindrical shell.

Further, a first stop pin for defining a maximum opening position and a second stop pin for defining a closing position are formed on the outer wall of the cylindrical housing, and the driving member includes a rotating shaft connected to the valve plate and a stop rod connected to the rotating shaft, and the stop rod is configured to be movable within a range defined by the first stop pin and the second stop pin under the action of the traction device.

Furthermore, a connecting line between the axis of the rotating shaft of the driving component and the axis of the first stop pin is superposed with the axis of the cylindrical shell, and a connecting line between the axis of the rotating shaft of the driving component and the axis of the second stop pin is perpendicular to the axis of the cylindrical shell.

Furthermore, a steering component for changing the transmission direction of the traction rope of the traction device is formed on the shell.

The invention also provides a pipeline, which comprises a first pipe section and a second pipe section which are fixed on a fixed foundation through a support, and the pipeline valve is hermetically communicated between the first pipe section and the second pipe section, wherein one end of the traction device is connected with the driving part, and the other end of the traction device is connected with the support.

Preferably, the hand-operated device of the towing device is mountable on the stand at a height in the range of 1.2-1.5 m.

Compared with the prior art, the pipeline valve switch has the following advantages:

1) according to the pipeline valve switch, the traction device connected with the driving part is arranged, so that a worker can drive the driving part to rotate only by pulling the traction device without contacting the driving part when needing to open or close the pipeline valve, and different included angles are formed between the plane where the valve plate is located and the cross section in the pipeline valve so as to adjust the opening and closing of the pipeline valve. Especially when the position of the pipeline valve is too high (or there is a danger of injuring workers), one end of the traction device can be connected with a driving part at a high position (or a far position), and the operation end of the traction device is arranged at a lower position closer to the workers, so that the workers can not fall from the high position or other accidents can not happen when opening or closing the pipeline valve, and therefore the safety is higher.

2) The arrangement of the traction device comprising the first traction assembly and the second traction assembly connected with the driving component enables the first traction assembly and the second traction assembly to be operated cooperatively to realize the adjustment of the valve between the closed position and the maximum opening position.

3) Make the staff can make the haulage rope can be stretched and contract through rotatory hand cranking device through setting up haulage rope and hand cranking device to the regulation should operate more simple and conveniently to the pulling force of drive assembly forward or reverse, has higher economic nature.

4) The first hand-operated device and the second hand-operated device are provided with a self-locking function, so that a worker can stop operating after rotating the first hand-operated device and the second hand-operated device clockwise (or anticlockwise) to proper positions, and the rotation is stopped under the action of the self-locking function of the first hand-operated device and the second hand-operated device, so that the driving part is positioned at a required rotating position.

Drawings

FIG. 1 is a front view of a pipeline valve switch according to a first embodiment of the present invention installed on a pipeline valve, wherein the pipeline valve is connected to a pipeline and a valve plate is in a closed position;

FIG. 2 is a front view of a pipeline valve switch according to a first embodiment of the present invention installed on a pipeline valve, wherein the pipeline valve is connected to a pipeline and a valve plate is in a maximum open position;

FIG. 3 is a front view of a pipeline valve switch according to a second embodiment of the present invention installed on a pipeline valve, wherein the pipeline valve is connected to a pipeline and the valve plate is in a closed position;

fig. 4 is a front view of a pipeline valve switch according to a second embodiment of the present invention installed on a pipeline valve, wherein the pipeline valve is connected to a pipeline and a valve plate is located at a maximum opening position.

Detailed Description

For better understanding of the objects, structure and functions of the present invention, a pipeline valve switch, a pipeline valve using the same and a pipeline thereof according to the present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 to 4 show the structure of a pipeline valve switch 100 according to the present invention, wherein fig. 1 and 2 show the structure of the pipeline valve switch 100 according to the first embodiment of the present invention, including a driving part 1 for connecting with a valve plate 4 of a valve 200 and a traction device 2 connected with the driving part 1, wherein the valve plate 4 has a maximum opening position as shown in fig. 1 and a closing position as shown in fig. 2, and the traction device 2 can drive the driving part 1 to rotate and fix to drive the valve plate 4 to rotate and fix between the closing position and the maximum opening position.

When the pipeline valve switch 100 according to the embodiment of the present invention is used, for example, when the pipeline valve switch 100 according to the embodiment of the present invention is installed on the pipeline valve 200, as shown in fig. 1, the valve switch 100 is in a closed state, and at this time, the valve plate 4 completely blocks the inner cross section of the pipeline valve 200, that is, the plane where the valve plate 4 is located completely coincides with the inner cross section of the pipeline valve 200, and a fluid (for example, wind flow) flowing through the pipeline valve 200 cannot flow from one side C to the other side D of the valve plate 4 (or from one side D to the other side C of the valve plate 4); when the pipeline valve switch 100 needs to be opened so that the pipeline valve 200 is opened, the traction device 2 can be pulled to drive the driving part 1 to rotate, so that the driving part 1 drives the valve plate 4 to rotate, at this time, the plane where the valve plate 4 is located generates an included angle relative to the inner cross section of the pipeline valve 200, and the fluid flowing through the pipeline valve 200 can flow from one side C to the other side D of the valve plate 4 (or from one side D to the other side C of the valve plate 4). Since the traction device 2 in the pipeline valve switch 100 according to the embodiment of the present invention can drive the driving member 1 to rotate and fix, the valve plate 4 can be fixed at any position between the closed position and the maximum opening position, and thus the desired opening position of the valve plate 4 relative to the pipeline valve 200 can be achieved.

According to the pipeline valve switch 100, the traction device 2 connected with the driving part 1 is arranged, so that a worker can drive the driving part 1 to rotate only by pulling the traction device 2 without contacting the driving part 1 when needing to open or close the pipeline valve 200, and a plane where the valve plate 4 is located and a cross section in the pipeline valve 200 form different included angles to adjust the opening and closing of the pipeline valve 200, and the pipeline valve switch 100 is low in cost and does not need to be electrified, so that the pipeline valve switch 100 has better economy. Especially when the position of the pipe valve 200 is too high (or there is a risk of injury to workers), one end of the traction device 2 may be connected to the driving part 1 at a high position (or a far position), and the operation end of the traction device 2 is disposed at a lower position closer to the workers, so as to ensure that the workers do not fall from the high position or have other accidents while opening or closing the pipe valve 200, thereby having higher safety.

In the embodiment shown in fig. 1 and 2, the traction device 2 may include a first traction assembly 21 connected to the driving member 1 and a second traction assembly 22 connected to the driving member 1, the first traction assembly 21 may be configured to pull the driving member 1 to move the valve 200 from the closed position shown in fig. 1 toward the maximum open position shown in fig. 2, and the second traction assembly 22 may be configured to pull the driving member 1 to move the valve 200 from the maximum open position shown in fig. 2 toward the closed position shown in fig. 1. For example, when it is required to adjust the valve 200 from the closed position shown in fig. 1 to the maximum open position shown in fig. 2, the operator may first rotate the second manual operating device 222 to make the second pulling rope 221 in a slack state, then rotate the first manual operating device 212 to make the first pulling rope 211 retract and drive the driving member 1 to rotate in the counterclockwise direction, and finally rotate to the maximum open position shown in fig. 2, and when the driving member 1 rotates in the counterclockwise direction, the second pulling rope 221 in the slack state is gradually stretched along with the movement of the driving member 1; when it is desired to adjust the valve 200 from the maximum open position shown in fig. 2 to the closed position shown in fig. 1, the operator can first rotate the first swing device 212 to make the first pulling rope 211 in a slack state, then rotate the second swing device 222 to make the second pulling rope 221 retract and drive the driving member 1 to rotate clockwise, and finally rotate to the closed position shown in fig. 1, and when the driving member 1 rotates clockwise, the first pulling rope 211 in the slack state is gradually stretched along with the movement of the driving member 1. The arrangement enables the first pulling assembly 21 and the second pulling assembly 22 to be cooperatively operated to adjust the valve 200 between the closed position and the maximum opening position.

In this embodiment, the first traction assembly 21 may include a first traction rope 211 connected to the driving member 1 and a first hand-operated device 212 connected to the first traction rope 211, the second traction member 22 may include a second traction rope 221 connected to the driving member 1 and a second hand-operated device 222 connected to the second traction rope 221, and both the first hand-operated device 212 and the second hand-operated device 222 may be connected to an external fixed base (e.g., a bracket 8 for supporting a pipe 300 as shown in fig. 1). Make the staff can make the haulage rope can be stretched and contract through rotatory hand cranking device through setting up haulage rope and hand cranking device to the regulation is to drive component 1 forward or reverse pulling force, and this operation is simple and convenient more, has higher economic nature.

Preferably, the first and second hand-operated devices 212 and 222 may each have a self-locking function. Through the arrangement, the worker can stop the operation after rotating the first hand-operated device 212 and the second hand-operated device 222 clockwise (or anticlockwise) to a proper position, at the moment, the rotation is stopped under the self-locking function of the first hand-operated device 212 and the second hand-operated device 222, the first hand-operated device 212 and the second hand-operated device 222 can be prevented from rotating continuously anticlockwise (or clockwise), and therefore the driving part 1 can be positioned at a required rotating position.

Fig. 3 and 4 show the structure of a pipeline valve switch 100 according to a second embodiment of the present invention, which is different from the embodiment shown in fig. 1 and 2 in that, the towing attachment 2 of this embodiment comprises a towing line 23 connected to the drive member 1, a hand cranking means 24 connected to the towing line 23, and an elastic return means 25, wherein the elastic return means 25 are connected between the drive member 1 and the closed position, so that when the hand cranking means 24 is rotated to stretch the traction rope 23, so that, when the driving part 1 moves the valve 200 from the closed position shown in fig. 3 towards the maximum open position shown in fig. 4, the elastic return means 25 are stretched, when the hand cranking means 24 is rotated in the opposite direction to release the pulling rope 23, the elastic return means 25 is returned to bring the valve 200 from the maximum opening position shown in fig. 4 towards the closed position shown in fig. 3. By this arrangement, when the valve plate 4 is in the maximum opening position, and when it is subsequently necessary to further adjust the movement of the valve plate 4 towards the closed position, the pulling rope 23 is released, and the elastic return means 25 can pull the pulling rope 23 under its own elastic force, so that the driving member 1 moves towards the initial closed position and finally returns to the initial closed position.

Of course, the elastic return means 25 may also be connected between the drive unit 1 and the maximum opening position, so that when the hand cranking means 24 is rotated to stretch the traction rope 21, so that the drive unit 1 moves the valve 200 from the maximum opening position towards the closed position, the elastic return means 25 is stretched, and when the hand cranking means 24 is rotated in the opposite direction to release the traction rope 21, the elastic return means 25 is returned to move the valve 200 from the closed position towards the maximum opening position. Through the arrangement, when the valve plate 4 is located at the closing position and when the valve plate 4 needs to be further adjusted to be located at the maximum opening position subsequently, the traction rope 23 is loosened, and the elastic resetting device 25 can pull the traction rope 23 under the action of the elastic force of the elastic resetting device, so that the driving component 1 is restored to the initial maximum opening position.

As shown in fig. 3 and 4, the elastic return means 25 may be a spring or a reed connected between the actuating member 1 and the closed position (or between the actuating member 1 and the maximum opening position). Preferably a spring as shown in figure 4.

It should be noted that the length of the elastic return means 25 can be negligible when the valve plate 4 is in the closed position, as shown in fig. 3, or the position of the elastic return means 25 can be set away from the driving part 1 by the same distance as the length of the elastic return means 25 when the valve plate 4 is in the closed position.

The present invention also proposes a pipeline valve 200, as shown in fig. 1 to 4, comprising a cylindrical housing 5 with both ends open and a valve plate 4 located inside the cylindrical housing 5, and a pipeline valve switch 100 according to the above connected to the valve plate 4, wherein the driving member 1 is located on the outer wall of the cylindrical housing 5.

The pipeline valve 200 of the invention is provided with the pipeline valve switch 100, so that a worker does not need to contact the driving part 1 when needing to open or close the pipeline valve 200, and only needs to pull the traction device 2 to drive the driving part 1 to rotate, so that the plane of the valve plate 4 and the cross section in the pipeline valve 200 form different included angles to adjust the opening and closing of the pipeline valve 200, the cost for arranging the traction device 2 is lower, and no power is needed, so that the pipeline valve switch 100 has better economy. Especially when the position of the pipe valve 200 is too high (or there is a risk of injury to workers), one end of the traction device 2 may be connected to the driving part 1 at a high position (or a far position), and the operation end of the traction device 2 is disposed at a lower position closer to the workers, so as to ensure that the workers do not fall from the high position or have other accidents while opening or closing the pipe valve 200, thereby having higher safety.

In the embodiment shown in fig. 1-2, the outer wall of the cylindrical housing 5 may further be formed with a first stop pin 51 for defining a maximum open position and a second stop pin 52 for defining a closed position, the driving member 1 may include a rotating shaft 11 connected to the valve plate 4 and a stop rod 12 connected to the rotating shaft 11, and the stop rod 12 may be configured to be movable within a range defined by the first stop pin 51 and the second stop pin 52 by the traction device 2. Because the pulling traction device 2 can make the driving part 1 drive the valve plate 4 to rotate 360 degrees in the pipeline valve 200, a worker generally only needs to adjust the valve plate 4 at a specified maximum opening position or closing position, and the maximum opening position and the closing position can be positioned through the arrangement, so that the worker can accurately adjust the valve plate 4 of the pipeline valve 200 to be at the maximum opening position or the closing position.

Similarly, in the embodiment shown in fig. 3 and 4, a first stop pin 51 for defining a maximum opening position and a second stop pin 52 for defining a closing position may also be formed on the outer wall of the cylindrical housing 5, and the functions of the first stop pin 51 and the second stop pin 52 are the same as the structures and functions of the first stop pin 51 and the second stop pin 52 in the embodiment shown in fig. 1 and 2, and are not described again here.

In the embodiment shown in fig. 1 to 4, a line between the axial center of the rotating shaft 11 of the driving member 1 and the axial center of the first stopper pin 51 may coincide with the axis of the cylindrical housing 5, and a line between the axial center of the rotating shaft 11 of the driving member 1 and the axial center of the second stopper pin 52 may be perpendicular to the axis of the cylindrical housing 5. With this arrangement, when the drive member 1 abuts against the first and second stopper pins 51 and 52, respectively, the valve plate 4 is accurately located at the maximum opening position and the closed position, respectively. Specifically, when the drive member 1 is rotated until the stopper rod 12 of the drive member 1 abuts against the first stopper pin 51, the rotating shaft 11 of the drive member 1 coincides with the axis of the cylindrical housing 5, and the valve plate 4 is at the maximum opening position; when the drive member 1 is rotated until the stopper rod 12 of the drive member 1 abuts against the second stopper pin 52, the rotation shaft 11 of the drive member 1 is perpendicular to the axis of the cylindrical housing 5, and the valve plate 4 is at the closed position.

Preferably, the first stop pin 51, the second stop pin 52 and the cylindrical housing 5 of the line valve 200 are integrally formed. This arrangement makes the connection between the first stop pin 51, the second stop pin 52 and the tubular housing 5 of the line valve 200 more stable.

Furthermore, as shown in fig. 1-4, a steering member 6 for changing the driving direction of the traction rope 23 of the traction device 2 may be formed on the housing 5, for example, in the embodiment shown in fig. 1 and 2, the steering member 6 is used for changing the driving direction of the first traction rope 211 and the second traction rope 221, respectively. By the arrangement, when the pulling rope 23 is pulled, the operation of an operator can be more labor-saving, and meanwhile, the pulling rope 23 cannot interfere with or be wound around other components in the pipeline valve switch 100 or the pipeline valve 200. Preferably, the steering member 6 may be a steering wheel.

With reference to fig. 1 and 3, the present invention further provides a pipeline 300, which includes a first pipe section 71 and a second pipe section 72 fixed on a fixed base through a bracket 8, and a pipeline valve 200 according to the above (as shown in fig. 1, two side end surfaces of the pipeline valve 200 are respectively fixedly connected with the pipeline 300 through flanges 9) hermetically communicated between the first pipe section 71 and the second pipe section 72, wherein one end of the traction device 2 is connected with the driving component 1, and the other end is connected with the bracket.

Because the pipeline valve 200 and the pipeline valve switch 100 are arranged in the pipeline 300, a worker can drive the driving part 1 to rotate only by pulling the traction device 2 without contacting the driving part 1 when needing to open or close the pipeline valve 200, so that the plane of the valve plate 4 and the cross section in the pipeline valve 200 form different included angles to adjust the opening and closing of the pipeline valve 200, the cost for arranging the traction device 2 is low, and the pipeline valve switch 100 does not need to be electrified, so that the pipeline valve switch 100 has better economy. Especially when the position of the pipe valve 200 is too high (or there is a risk of injury to workers), one end of the traction device 2 may be connected to the driving part 1 at a high position (or a far position), and the operation end of the traction device 2 is disposed at a lower position closer to the workers, so as to ensure that the workers do not fall from the high position or have other accidents while opening or closing the pipe valve 200, thereby having higher safety.

Preferably, for a pipe 300 set at a high level (typically more than 3 meters from the ground), the hand crank 24 of the towing installation 2 can be mounted on a stand at a height in the range of 1.2-1.5 m. This height range can adapt to the crowd of wider range, ensures that the staff homoenergetic of co-altitude all can operate hand cranking device 24.

It is also preferable that the pipe valve 200 is the same material as the pipe 300. This arrangement makes the connection of the pipe valve 200 to the pipe 300 more stable.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.