A liquid diversion control device on a HVAC pipeline

Abstract

The present invention discloses a liquid diversion control device on a HVAC pipeline, which relates to the field of valve technology, including a valve body, the valve body including a first channel and a second channel, three-way valve cores are respectively arranged in the first channel and the second channel, the two three-way valve cores are connected through a third channel, and the three-way valve core has three water outlets in different directions; a two-way valve core for controlling the flow is arranged in the first channel, and also includes a discharge ball valve with a filter screen arranged inside, and the medium in the second channel flows through the filter screen. The device is easy to operate, and can control different flow directions of the medium by controlling the different opening directions of the handle, and can realize the flow adjustment work. The sewage discharge work of the valve body can also be realized by rotating the control handle, which is convenient for application in different scenes, has a wide range of application methods, and has a high promotion value.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a liquid flow diversion control device on a HVAC pipeline. Background Art

[0002] In industrial or civil infrastructure, pipelines are usually used to transport media. Valves, especially ball valves, are usually used in pipeline transportation to achieve the purpose of switching or regulating the pipeline media. Ball valves usually use a sphere with a circular channel as an opening and closing element, and the ball is opened and closed as the valve body rotates. The opening and closing part of the ball valve is a sphere with a through hole, which rotates around an axis perpendicular to the channel to achieve the purpose of opening and closing the channel.

[0003] The patent with announcement number CN 214617948 U discloses a HVAC ball valve, including a valve shell, a spherical valve core and a filter body. When in use, it is first installed on the HVAC pipe through the valve body inlet and the valve body outlet. When the water in the HVAC pipe passes through the spherical valve core, the water will enter the filter body, be filtered through the filter cylinder in the filter body, and then be discharged from the valve body outlet.

[0004] However, the device still has the following problems: when it is necessary to control the confluence, diversion and flow direction of the medium, the structure described can only connect in two directions, and it is obviously impossible to freely adjust the flow direction of the medium, and it also does not have the function of sewage discharge. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, a liquid diversion control device on a HVAC pipeline is provided.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] The present invention proposes a liquid diversion control device on a HVAC pipeline, including a valve body, the valve body including a first channel and a second channel, three-way valve cores are respectively arranged in the first channel and the second channel, the two three-way valve cores are connected through a third channel, and the three-way valve core has three water outlets in different directions; a two-way valve core for controlling the flow is arranged in the first channel, and also includes a discharge ball valve with a filter screen arranged inside, and the medium in the second channel flows through the filter screen.

[0008] Preferably, the filter screen is cylindrical, with openings provided at both ends of the filter screen, and the medium in the second channel flows into the filter screen through the openings, and then flows back into the second channel through the side wall of the filter screen.

[0009] Preferably, the valve body is connected to a plurality of PT components, and the PT components can be equipped with temperature and pressure monitoring mechanisms.

[0010] Preferably, the valve body is rotatably connected to an adjusting handle, the adjusting handle can drive the two-way valve core to rotate, and the adjusting handle is fixedly connected to a guide rod; the valve body is fixedly connected to a limiting plate, the limiting plate is provided with an arc-shaped hole for the guide rod to slide freely, and the guide rod is threadedly connected to a nut that can abut against the limiting plate.

[0011] Preferably, the filter screen is rotatably connected to the discharge ball valve, the filter screen fixing sleeve is provided with a passive wheel, an internal hollow friction wheel is rotatably connected in the second channel, the friction wheel is in contact with the passive wheel, and the friction wheel can drive the filter screen to rotate when it rotates.

[0012] Preferably, a square shaft is rotatably connected in the second channel, a turntable is slidably connected to the square shaft, a plurality of water holes are provided on the turntable, a slot is provided on the inner ring of the friction wheel, and a claw capable of being inserted into the slot is rotatably connected to the turntable.

[0013] Preferably, the square shaft sleeve is provided with a spring, one end of the spring is connected to the turntable, and the other end is connected to the square shaft, and the claw is connected to the turntable via a tension spring.

[0014] Preferably, the square shaft fixing sleeve is provided with a water wheel, the square shaft is provided with a plurality of insertion holes, the valve body is slidably connected with a plug rod which can slide into the insertion hole, the valve body is slidably connected with a rack, the rack is provided with an inclined groove, and the upper end of the plug rod is slidably arranged in the inclined groove.

[0015] Preferably, the rack is connected to the valve body via a return spring, the valve body is rotatably connected to a flap, the flap is coaxially connected to a gear, and the gear is meshed with the rack.

[0016] Preferably, the valve body is connected to an alarm, the valve body is connected to a proximity switch capable of controlling the operation of the alarm, the valve body is slidably connected to a slide plate cooperating with the proximity switch, and the slide plate is connected to the valve body through a small spring; the slide plate is connected to a magnet, and the valve body is slidably connected to a detection rod that has an attractive effect on the magnet. In the initial state, the friction wheel is located between the detection rod and the turntable, and the turntable can drive the detection rod to move upward.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present application is provided with a first channel and a second channel, and water outlets are provided on the three sides of the three-way valve core, and the three water outlets are interconnected. When in use, the connection work in different directions can be achieved by turning the handle, and the operation is convenient. By controlling the different opening directions of the handle, the different flow directions of the medium can be controlled. By driving the two-way valve core to rotate by the adjusting handle, the flow rate can be adjusted. It is convenient for application in different scenarios, has a wide range of applications, and has a high promotion value.

[0019] 2. The present application is provided with a drain ball valve. The medium in the second channel flows into the filter through the opening, and then flows back into the second channel through the side wall of the filter, thereby filtering the medium. By opening the drain ball valve and turning the control handle, the three-way ball valve can have different directions, and the sewage discharge work of the valve body can also be realized, thereby facilitating the use and cleaning of the valve.

[0020] 3. The present application is provided with a flap, and the water flow can push the flap to rotate. The flap can drive the plug rod to move out of the socket through the rack. At this time, the water wheel can rotate freely. When the water flow is large enough and the rotation speed of the turntable is fast enough, the claw can be stuck in the friction wheel, which can drive the friction wheel to rotate, and then drive the filter to rotate, thereby improving the filtering effect and reducing the occurrence of filter blockage. When the water flow is small, the claw will not be stuck in the friction wheel, and the filter will not rotate at this time, so as not to affect the normal passage of water. If the filter is blocked, the turntable cannot rotate at this time, and it will not affect the subsequent alarm work.

[0021] 4. The present application is provided with a detection rod. When the filter is clogged, less water passes through the filter, and the rotation angle of the flap is not enough to move the insertion rod out of the socket. At this time, the water wheel cannot rotate, and the water flow can push the turntable over the friction wheel and contact the detection rod. The turntable can drive the detection rod to rise, and the detection rod drives the slide plate to move through the magnet, so that the proximity switch receives the signal and realizes the alarm, thereby playing a role of timely warning when the filter is clogged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 The present invention is a whole three-dimensional Figure 1 ;

[0024] Figure 2 The present invention is a whole three-dimensional Figure 2 ;

[0025] Figure 3 is an overall cross-sectional view of the present invention;

[0026] Figure 4 is an overall top view of the present invention;

[0027] Figure 5 yes Figure 4 The structural section view of the AA part;

[0028] Figure 6 This is the overall front view of the first embodiment;

[0029] Figure 7 This is the overall front view in the second embodiment;

[0030] Figure 8 yes Figure 7 Side view of the structure of the middle turntable;

[0031] Fig. 9 yes Figure 7 Schematic diagram of the structure of the detection rod part.

[0032] Description of reference numerals:

[0033] 1 valve body; 2 PT assembly; 3 adjustment handle; 4 handle; 5 discharge ball valve; 6 proximity switch; 7 detection rod; 8 magnet; 9 claw; 10 friction wheel; 11 limit plate; 12 fixed valve core; 13 two-way valve core; 14 three-way valve core; 15 slot; 16 square shaft; 17 filter screen; 18 transition wheel; 19 flap; 20 turntable; 21 gear; 22 rack; 23 water wheel; 24 plug rod; 25 inclined groove; 26 groove. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] Embodiment 1

[0036] like Figure 1-Figure 6 As shown, this embodiment proposes a liquid diversion control device on a HVAC pipeline, including a valve body 1, the valve body 1 includes a first channel and a second channel, three-way valve cores 14 are respectively arranged in the first channel and the second channel, and the two three-way valve cores 14 are connected through a third channel.

[0037] The two three-way valve cores 14 are both rotatably connected to the valve body 1. The valve body 1 is rotatably connected to two handles 4. The two handles 4 are respectively fixedly connected to the three-way valve cores 14. By rotating the handles 4, the three-way valve core 14 can be driven to rotate, thereby realizing the flow of the medium in different directions.

[0038] The three-way valve core 14 has three water outlets facing in different directions. A two-way valve core 13 for controlling the flow rate is arranged in the first channel. The valve body 1 is rotatably connected to an adjusting handle 3. The adjusting handle 3 and the two-way valve core 13 are fixedly connected. The adjusting handle 3 can drive the two-way valve core 13 to rotate. The valve body 1 is fixedly connected to a fixed valve core 12. The fixed valve core 12 is a high-precision valve core with a central inner hole. It cooperates with the two-way valve core 13 to control the flow rate of the pipeline, thereby realizing precise control of the flow rate.

[0039] The adjusting handle 3 is fixedly connected with a guide rod, and the valve body 1 is fixedly connected with a limiting plate 11. The limiting plate 11 is provided with an arc-shaped hole for the guide rod to slide freely. The arc-shaped hole serves to limit and guide the guide rod. The guide rod is threadedly connected with a nut that can abut against the limiting plate 11. The adjusting handle 3 can be unlocked and locked by loosening and tightening the nut.

[0040] The limit plate 11 is provided with a scale, through which the rotation angle of the adjusting handle 3 can be easily known. When the adjusting handle 3 rotates, the guide rod can slide in the arc hole, and the flow rate can be adjusted by driving the two-way valve core 13 to rotate at different angles. Thereafter, the nut is tightened and the nut and the limit plate 11 are in contact. At this time, the adjusting handle 3 cannot be rotated, thereby preventing the adjusting handle 3 from rotating due to accidental contact or the like.

[0041] Water outlets are arranged on the three sides of the three-way valve core 14, and the three water outlets are interconnected. When in use, the connection work in different directions can be realized by rotating the handle 4, which is easy to operate. By controlling the different opening directions of the handle 4, the different flow directions of the medium can be controlled. By driving the two-way valve core 13 to rotate by adjusting the handle 3, the flow rate can be adjusted, which is convenient for application in different scenarios, has a wide range of applications, and has a high promotion value.

[0042] It also includes a drain ball valve 5 with a filter screen 17 inside. The outer wall of the drain ball valve 5 is fixedly connected to the outer wall of the valve body 1. The medium in the second channel flows through the filter screen 17. The filter screen 17 is cylindrical and has openings at both ends. The medium in the second channel flows into the filter screen 17 through the openings and then flows back into the second channel through the side wall of the filter screen 17. The filter screen 17 and the drain ball valve 5 are fixedly connected.

[0043] The drain ball valve 5 is rotatably connected to a drain valve core, and the drain valve core is a two-way structure. The drain ball valve 5 is rotatably connected to a drain handle, and the drain handle and the drain valve core are fixedly connected. The drain handle can drive the drain valve core to rotate, thereby realizing the discharge of impurities in the drain ball valve 5. By closing the drain valve core, the medium can flow through the filter screen 17 at this time, and the filter screen 17 realizes the filtering of the medium.

[0044] The medium in the second channel flows into the filter screen 17 through the opening, and then flows back into the second channel through the side wall of the filter screen 17, thereby filtering the medium. By opening the drain ball valve 5 and rotating the control handle 4, the three-way ball valve 14 can have different orientations, and the sewage discharge work of the valve body 1 can also be realized, thereby facilitating the use and cleaning of the valve.

[0045] The valve body 1 is connected to a plurality of PT assemblies 2 , and the PT assemblies 2 can be equipped with temperature and pressure monitoring mechanisms to monitor the temperature and pressure of the medium in the valve body 1 .

[0046] Embodiment 2

[0047] Reference Figure 7-Figure 8 The other structures are the same as those in the first embodiment, except that, in this embodiment, the filter screen is easily clogged because only one side of the filter screen is used for filtering.

[0048] The filter screen 17 is rotatably connected to the discharge ball valve 5, the filter screen 17 is fixed with a passive wheel, the valve body 1 is rotatably connected with a transition wheel 18, and the second channel is rotatably connected with an internal hollow friction wheel 10, and the two ends of the transition wheel 18 are respectively in contact with the friction wheel 10 and the passive wheel, specifically friction contact, and the surfaces of the friction wheel 10, the passive wheel and the filter wheel 18 are rough enough to provide sufficient friction. When the friction wheel 10 rotates, it can drive the filter wheel 18 to rotate, and the transition wheel 18 can drive the passive wheel to rotate, thereby driving the filter screen 17 to rotate.

[0049] A fixing seat is fixedly connected in the second channel, and a square shaft 16 is rotatably connected to the fixing seat. The square shaft 16 can only rotate. A turntable 20 is slidably connected to the square shaft 16. The turntable 20 can slide along the length direction of the square shaft 16. The turntable 20 is provided with a plurality of water holes so as not to affect the normal water flow work.

[0050] The square shaft 16 is sleeved with a spring, one end of the spring is connected to the turntable 20, and the other end is connected to the square shaft 16. In the initial state, under the elastic force of the spring, the turntable 20 is located on the side away from the friction wheel 10. When water flow impacts the turntable 20, the water flow can drive the turntable 20 to slide along the square shaft 16, so that the turntable 20 moves toward the direction close to the friction wheel 10.

[0051] A slot 15 is provided on the inner ring of the friction wheel 10, and a turntable 20 is rotatably connected to a claw 9 that can be inserted into the slot 15. The claw 9 is connected to the turntable 20 through a tension spring. In the initial state, under the elastic force of the tension spring, the claw 9 is located on the inner side of the slot 15, and the claw 9 will not be inserted into the slot 15. When the turntable 20 rotates, under the action of centrifugal force, the claw 9 rotates around the turntable 20, and the claw 9 can be inserted into the slot 15, and the turntable 20 can drive the friction wheel 10 to rotate.

[0052] The square shaft 16 is fixedly sleeved with a water wheel 23. When water flows through, the water wheel 23 can be driven to rotate, thereby driving the square shaft 16 to rotate. The square shaft 16 is provided with a plurality of insertion holes. The valve body 1 is slidably connected with a plug rod 24 that can slide into the insertion hole. The valve body 1 is slidably connected with a rack 22. The rack 22 is provided with an inclined groove 25. The upper end of the plug rod 24 is slidably set in the inclined groove 25.

[0053] The insertion rod 24 slides in the vertical direction and the rack 22 slides in the horizontal direction. When the rack 22 slides, the inclined groove 25 is driven to move. Since the insertion rod 24 can only move in the vertical direction, it can drive the insertion rod 24 to descend or rise, so that the insertion rod 24 is inserted into the socket or removed from the socket.

[0054] The rack 22 is connected to the valve body 1 through a return spring. The left end of the return spring is connected to the valve body 1, and the right end of the return spring is connected to the rack 22. The valve body 1 is rotatably connected to a flap 19, and the flap 19 is coaxially fixedly connected to a gear 21. The gear 21 and the rack 22 are meshed.

[0055] In the initial state, under the elastic force of the return spring, the flap 19 is in a state of closing the second channel. When water flows through, the water flow can drive the flap 19 to rotate, and the flap 19 can drive the gear 21 to rotate, and the gear 21 drives the rack 22 to slide, and the rack 22 drives the plug rod 24 to move upward, so that the plug rod 24 moves away from the socket. By reasonably setting the length of the plug rod 24, the plug rod 24 will not move out of the socket until the flap 19 is rotated a sufficient angle.

[0056] The water flow can push the flap 19 to rotate, and the flap 19 can drive the insertion rod 24 to move out of the insertion hole through the rack 22. At this time, the water wheel 23 can rotate freely. When the water flow is large enough, the rotation speed of the turntable 20 is fast enough, and the claw 9 can be stuck in the friction wheel 10, which can drive the friction wheel 10 to rotate, and then drive the filter screen 17 to rotate, thereby improving the filtering effect. When the water flow is small, the claw 9 will not be stuck in the friction wheel 10. At this time, the filter screen 17 does not rotate, so as not to affect the normal passage of the water flow.

[0057] Embodiment 3

[0058] refer to Fig. 9 The other structures are the same as those in the first embodiment, except that, in this embodiment, an alarm problem is taken into consideration when the valve body is blocked.

[0059] The valve body 1 is connected to an alarm, which is located on the outside of the valve body 1. The alarm can be specifically a buzzer. The valve body 1 is connected to a proximity switch 6 that can control the operation of the alarm. The valve body 1 is slidably connected to a slide plate that cooperates with the proximity switch 6. After the slide plate moves to one side of the proximity switch 6, the proximity switch 6 receives a signal and can control the buzzer to alarm.

[0060] The proximity switch 6 is a position switch that can be operated without direct mechanical contact with the moving parts. When the sliding plate approaches the sensing surface of the switch to the action distance, the switch can be actuated without mechanical contact or any pressure, thereby driving the buzzer to provide control instructions, causing the buzzer to alarm and achieve early warning.

[0061] The slide plate is connected to the valve body 1 through a small spring, the upper end of the small spring is connected to the valve body 1, and the lower end of the small spring is connected to the slide plate. In the initial state, under the elastic force of the small spring, there is a suitable gap between the slide plate and the proximity switch 6. At this time, the proximity switch 6 will not receive the corresponding signal, and the alarm will not work.

[0062] A magnet 8 is fixedly connected to the lower end of the slide plate, and a detection rod 7 which attracts the magnet 8 is slidably connected to the valve body 1. In the initial state, the friction wheel 10 is located between the detection rod 7 and the turntable 20, and the turntable 20 can drive the detection rod 7 to move upward.

[0063] The detection rod 7 can be made of iron. When the detection rod 7 rises, the detection rod 7 and the magnet 8 attract each other, which can drive the slide plate to descend. The slide plate and the proximity switch 6 cooperate to realize an alarm. The lower surface of the detection rod 7 is an inclined surface, which makes it convenient for the turntable 20 to drive the detection rod 7 to rise. By setting the magnet 8, the proximity switch 6 is completely located in the valve body 1 and will not contact the medium in the second channel, thereby reducing the corrosion of the proximity switch 6 by the medium.

[0064] The friction wheel 10 is provided with a groove 26. When the turntable 20 rotates, the claw 9 extends out under the action of centrifugal force, and the claw 9 can be stuck in the groove 26. At this time, the turntable 20 cannot continue to move to the left. The setting of the groove 26 realizes the limit of the movement of the turntable 20, so that the turntable 20 drives the friction wheel 10 to rotate. When the turntable 20 does not rotate, the outer diameter of the turntable 20 is smaller than the inner diameter of the groove 26. At this time, the turntable 20 can normally pass over the friction wheel 10, and the groove 26 will not limit the turntable 20.

[0065] A method for using a liquid flow diversion control device on a HVAC pipeline, using the above-mentioned liquid flow diversion control device on a HVAC pipeline, comprises the following steps:

[0066] S1: The water in the second channel flows into the filter screen 17 through the opening of the filter screen 17, and then flows back into the second channel through the side wall of the filter screen 17. The water flow drives the flap 19 to rotate, and the flap 19 drives the rack 22 to slide. The rack 22 drives the insertion rod 24 to move upward, so that the insertion rod 24 moves out of the insertion hole of the square shaft 16.

[0067] S2: As the water flows, the water drives the water wheel 23 to rotate, and the water wheel 23 drives the turntable 20 to rotate. Under the action of centrifugal force, the claw 9 rotates around the turntable 20. At the same time, the water pushes the turntable 20 to move, so that the turntable 20 moves into the groove 26, the claw 9 is inserted into the slot 15, the turntable 20 drives the friction wheel 10 to rotate, and the friction wheel 10 drives the filter screen 17 to rotate, thereby filtering the water flow.

[0068] When the filter 17 is blocked, the water flow is reduced, and the angle of rotation of the flap 19 is not enough to move the insertion rod 24 out of the hole. At this time, the square shaft 16 cannot rotate, and the water flow pushes the turntable 20 to pass over the friction wheel 10 and contact the detection rod 7. The turntable 20 drives the detection rod 7 to rise, and the detection rod 7 drives the slide plate to move through the magnet 8, so that the proximity switch 6 receives a signal and an alarm is triggered.

[0069] By loosening the nut, the guide rod of the adjusting handle 3 can slide freely in the arc hole of the limiting plate 11, and the adjusting handle 3 drives the two-way valve core 13 to rotate to adjust the flow rate. After the adjustment is completed, the nut is tightened, and the nut abuts against the limiting plate 11.

[0070] The left and right ends of the first channel are the first water inlet and the first water outlet respectively, and the left and right ends of the second channel are the second water outlet and the second water inlet respectively. The left end of the first channel and the left end of the second channel are connected to the FCU. By controlling the different directions of the handle 4, different water flow directions can be achieved.

[0071] For example: water flows in through the second water inlet at the right end of the second channel, then enters the opening of the filter 17, flows back into the second channel from the side wall of the filter 17, then enters the FCU through the second water outlet at the left end of the second channel, then flows into the first water inlet at the left end of the first channel, and then flows out from the first water outlet at the right end of the first channel.

[0072] For example, water may flow in from the second water inlet at the right end of the second channel, pass through the third channel, directly flow into the first channel, and then flow out from the first water outlet at the right end of the first channel.

[0073] For example, water can flow in from the second water inlet at the right end of the second channel. By turning the handle 4, the second channel and the third channel are no longer connected. By opening the drain ball valve 5, the water flow can flush out the impurities in the filter 17 to achieve drainage.

[0074] For example, water can flow in from the second water outlet at the right end of the first channel, then flow into the FCU, and then flow into the second channel. By turning the handle 4, the water cannot flow out from the second water inlet at the right end of the second channel. By opening the drain ball valve 5, the water can flush out the impurities in the filter 17 to achieve drainage.

[0075] FCU is the terminal device of the air conditioning system. Its working principle is to continuously recirculate the air in the room, cool (heat) the air after passing through the cold water (hot water) coil, and send the treated air out through the fan to achieve effective regulation of the indoor air to keep the room temperature constant. The hot water or cold water in the second channel flows through the FCU and flows out from the first channel to achieve heating or cooling of the air.

[0076] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid flow control device for a HVAC pipeline, comprising a valve body (1), characterized in that: The valve body (1) comprises a first channel and a second channel, wherein three-way valve cores (14) are respectively arranged in the first channel and the second channel, the two three-way valve cores (14) are connected via a third channel, and the three-way valve core (14) has three water outlets facing in different directions; a two-way valve core (13) for controlling flow is arranged in the first channel, and further comprises a discharge ball valve (5) having a filter screen (17) arranged therein, and the medium in the second channel flows through the filter screen (17); The filter screen (17) and the discharge ball valve (5) are rotatably connected, the filter screen (17) is fixed with a passive wheel, and a friction wheel (10) with a hollow interior is rotatably connected in the second channel, the friction wheel (10) and the passive wheel are in contact, and when the friction wheel (10) rotates, it can drive the filter screen (17) to rotate; A square shaft (16) is rotatably connected in the second channel, a rotating disk (20) is slidably connected to the square shaft (16), a plurality of water holes are provided in the rotating disk (20), a clamping groove (15) is provided in the inner ring of the friction wheel (10), and a clamping claw (9) capable of being clamped into the clamping groove (15) is rotatably connected to the rotating disk (20); The square shaft (16) is sleeved with a spring, one end of the spring is connected to the rotating disk (20), and the other end is connected to the square shaft (16), and the claw (9) is connected to the rotating disk (20) via a tension spring; The square shaft (16) is fixedly sleeved with a water wheel (23), the square shaft (16) is provided with a plurality of insertion holes, the valve body (1) is slidably connected with an insertion rod (24) capable of sliding into the insertion holes, the valve body (1) is slidably connected with a rack (22), the rack (22) is provided with an inclined groove (25), and the upper end of the insertion rod (24) is slidably arranged in the inclined groove (25); The rack (22) is connected to the valve body (1) via a return spring; the valve body (1) is rotatably connected to a flap (19); the flap (19) is coaxially connected to a gear (21); the gear (21) and the rack (22) are meshed.

2. A liquid flow control device for a HVAC pipeline according to claim 1, characterized in that: The filter screen (17) is cylindrical, and openings are provided at both ends of the filter screen (17). The medium in the second channel flows into the filter screen (17) through the openings, and then flows back into the second channel through the side wall of the filter screen (17).

3. The liquid diversion control device for a HVAC pipeline according to claim 1, characterized in that: The valve body (1) is connected to a plurality of PT components (2), and the PT components (2) are equipped with temperature and pressure monitoring mechanisms.

4. The liquid diversion control device for a HVAC pipeline according to claim 1, characterized in that: The valve body (1) is rotatably connected to an adjusting handle (3), the adjusting handle (3) being capable of driving a two-way valve core (13) to rotate, the adjusting handle (3) being fixedly connected to a guide rod; the valve body (1) is fixedly connected to a limit plate (11), the limit plate (11) being provided with an arc-shaped hole for the guide rod to slide freely, the guide rod being threadedly connected to a nut capable of abutting against the limit plate (11).

5. The liquid flow diversion control device on a HVAC pipeline according to claim 1, characterized in that: The valve body (1) is connected to an alarm, the valve body (1) is connected to a proximity switch (6) capable of controlling the operation of the alarm, the valve body (1) is slidably connected to a slide plate that cooperates with the proximity switch (6), and the slide plate is connected to the valve body (1) via a small spring; the slide plate is connected to a magnet (8), and the valve body (1) is slidably connected to a detection rod (7) that has an attraction effect on the magnet (8); in an initial state, the friction wheel (10) is located between the detection rod (7) and the rotating disk (20), and the rotating disk (20) can drive the detection rod (7) to move upward.

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