CN113719622A

CN113719622A - Telescopic filtering pressure-reducing gate valve

Info

Publication number: CN113719622A
Application number: CN202111072842.4A
Authority: CN
Inventors: 李洪圆
Original assignee: TONGLING SIND VALVES HEAD FACTORY
Current assignee: TONGLING SIND VALVES HEAD FACTORY
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-11-30
Anticipated expiration: 2041-09-14
Also published as: CN113719622B

Abstract

The invention discloses a telescopic filtering and pressure reducing gate valve, which relates to the field of gate valves and comprises a valve body, wherein a first connecting pipe is arranged at the top end of the valve body, a valve mechanism penetrating through the first connecting pipe and extending into the valve body is arranged above the first connecting pipe, a shell is arranged at one side of the first connecting pipe at the top end of the valve body, a flow monitoring mechanism penetrating into the valve body is arranged inside the shell, a second connecting pipe is connected at one end of the valve body, an inclined pipe is connected below the second connecting pipe, and a filtering and pressure reducing mechanism is arranged inside the inclined pipe. According to the invention, the filter bin pressure reducing mechanism and the transmission mechanism are arranged, the filter pressure reducing mechanism can effectively reduce the pressure of the water flow and filter impurities in the water, and the transmission mechanism is matched to enable the local part of the filter pressure reducing mechanism to rotate, so that the impurities can be effectively prevented from being accumulated at a certain position on the surface of the filter pressure reducing mechanism.

Description

Telescopic filtering pressure-reducing gate valve

Technical Field

The invention relates to the field of gate valves, in particular to a telescopic filtering pressure-reducing gate valve.

Background

The gate valve is a shutter plate, the movement direction of the shutter plate is perpendicular to the fluid direction, the gate valve can only be fully opened and fully closed and can not be adjusted and throttled, the gate valve is sealed by the contact of a valve seat and the shutter plate, the shutter plate is opened by rotating a handle, and the shutter plate moves up and down.

According to the 'telescopic gate valve' disclosed in the Chinese patent No. CN206054769U, the disclosed patent comprises a valve body, a valve rod and a valve cover for fixing the valve rod; the valve body is in a three-way tubular shape and comprises a water inlet end, a water outlet end and a valve plate opening and closing end arranged between the water inlet end and the water outlet end; the lower end of the valve rod is provided with a valve plate, and the upper end of the valve rod is provided with a hand wheel; the valve plate is arranged in the opening and closing end of the valve plate; the valve cover is arranged on the opening and closing end of the valve plate; the water inlet end of the valve body comprises a fixed part and a movable part; the fixed part and the valve plate opening and closing end are integrally formed, and the movable part is sleeved on the outer wall of the fixed part in an axially slidable manner; the outer wall of the fixed part is provided with a groove; the movable part is provided with a limiting block for preventing the movable part from completely sliding out of the fixed part; the lower end of the limiting block is positioned in the groove. The utility model has the advantages that: the installation is convenient, the practicality is strong, and the leakproofness is good, simple structure, and it is low to make use cost.

However, the gate valve cannot perform the function of pressure reduction and filtration during use, and cannot monitor the flow in real time.

Disclosure of Invention

The invention aims to: in order to solve present gate valve in the use, can't play the filterable effect of decompression, the unable problem of real-time supervision flow size provides the telescopic and filters decompression gate valve simultaneously.

In order to achieve the purpose, the invention provides the following technical scheme: the telescopic filters decompression gate valve, including the valve body, the top of valve body is provided with the connecting pipe No. one, the top of connecting pipe is provided with and runs through a connecting pipe and extend to the inside valve mechanism of valve body, one side that the top of valve body is located a connecting pipe is provided with the casing, the inside of casing is provided with and runs through to the inside flow monitoring mechanism of valve body, the one end of valve body is connected with the connecting pipe No. two, the below of connecting pipe No. two is connected with the pipe chute, the inside of pipe chute is provided with filters decompression mechanism.

As a still further scheme of the invention: valve mechanism is including being located the handle of a connecting pipe top, the bottom of handle is connected with and runs through a connecting pipe and extend to the inside screw rod of valve body, the outer wall connection of screw rod has the valve plate, the inside of a connecting pipe seted up with valve plate removal orbit assorted spread groove, the position department that the valve plate meets the department with the screw rod is provided with the internal thread with screw rod outer wall assorted, the screw rod passes through the bearing with a connecting pipe and rotates and be connected, the bottom outside and the valve body of screw rod pass through the bearing rotation and are connected.

As a still further scheme of the invention: flow monitoring mechanism is including being located the inside carousel of casing, the bottom of carousel is connected with the round bar that runs through to the casing below, the below of round bar is connected with the connecting rod, the outer wall connection of connecting rod has the dwang that runs through to the valve body is inside, the internal connection that the outside of dwang is located the valve body turns over the board, the bottom of dwang is connected with the ratchet No. one, the outside meshing of ratchet has a pawl, flow monitoring mechanism still runs through the infrared emitter to the casing inside including the outside from the casing, the outer wall of carousel is fixed with the multiunit lug, the inside of lug is provided with the plane of reflection, the one end of a pawl is passed through drive mechanism and is linked to each other with filtration relief mechanism.

As a still further scheme of the invention: the transmission mechanism comprises a transmission rod located at one end of a first pawl, the bottom end of the transmission rod is connected with a connecting shaft, the outer wall of the connecting shaft is connected with a torsion spring, the other end of the transmission rod is connected with a second pawl, one end of the second pawl is connected with a second ratchet wheel, the top end of the second ratchet wheel is connected with an umbrella-shaped gear, and the outer wall of the umbrella-shaped gear is meshed with a hollow gear.

As a still further scheme of the invention: the filtering and pressure reducing mechanism comprises an annular pipe which is positioned on the inner wall of the inclined pipe and is connected with the hollow gear, the bottom end of the annular pipe is connected with a filter cylinder, the outer walls of the annular pipe and the filter cylinder are provided with connecting grooves, the connecting block is arranged at the position where the hollow gear is connected with the connecting grooves, the interior of the annular pipe is equidistantly provided with water outlets, the lower part of the inner wall of the filter cylinder is connected with a sealing head, the bottom end of the sealing head is connected with a bottom plate, the bottom end of the bottom plate is connected with a handle, the bottom end of the bottom plate is provided with a hollow pipe penetrating to the bottom plate, a sleeve is rotatably connected above the outer wall of the hollow pipe, the inner wall of the sleeve is connected with a spring, the top end of the spring is located on the inner wall of the sleeve and is connected with a telescopic rod, the top end of the telescopic rod is connected with a lifting plate, and a clamping block parallel to the connecting block is arranged on the inner wall of the second connecting pipe.

As a still further scheme of the invention: the infrared emitter is detachably connected with the shell through threads, the infrared emitter is electrically connected with the pneumatic unit through the controller, and the cross sections of the connecting rod and the inner wall of the rotating rod are regular polygons.

As a still further scheme of the invention: the bottom of connecting axle is passed through the bearing with the inside of valve body and is rotated and be connected, the position department that the valve body meets with the transfer line is provided with the spread groove, the umbrella-shaped gear runs through to the inside cavity position department of valve body from the inside of valve body.

As a still further scheme of the invention: one end of the hollow pipe, which is positioned below the bottom plate, is connected with the pneumatic unit through a pipeline.

As a still further scheme of the invention: the pneumatic unit comprises a gas pipe, an electromagnetic valve and an air pump, wherein the electromagnetic valve is positioned on the outer wall of the gas pipe, one end of the gas pipe is connected with the air pump, and the other end of the gas pipe is connected with the hollow pipe through a pipeline.

As a still further scheme of the invention: the valve body is of a split sleeve structure.

Compared with the prior art, the invention has the beneficial effects that:

1. by arranging the filter bin pressure reducing mechanism and the transmission mechanism, the filter pressure reducing mechanism can effectively reduce the pressure of the water flow and filter impurities in the water, and the transmission mechanism is matched to enable the local part of the filter pressure reducing mechanism to rotate, so that the impurities can be effectively prevented from being accumulated at a certain position on the surface of the filter pressure reducing mechanism;

2. through setting up flow monitoring mechanism and drive mechanism, when carrying out flow monitoring, can transmit power to drive mechanism, play power transmission's effect, need not the external power of exerting, the pneumatic unit of cooperation simultaneously can reduce the water resistance when discharge is too little.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the mounting of the transmission of the present invention;

FIG. 3 is a schematic view of an infrared emitter according to the present invention;

FIG. 4 is a cross-sectional view of a second connector tube of the present invention;

FIG. 5 is a schematic view showing the installation of the filtrate pressure reducing mechanism of the present invention;

fig. 6 is a schematic structural view of the valve body of the present invention.

In the figure: 1. a valve body; 2. a first connecting pipe; 3. a valve plate; 4. a screw; 5. a handle; 6. a housing; 7. a second connecting pipe; 8. an inclined tube; 9. an annular tube; 10. a sealing head; 11. rotating the rod; 12. turning over a plate; 13. a connecting rod; 14. a round bar; 15. a turntable; 16. a first ratchet wheel; 17. a first pawl; 18. a transmission rod; 19. a connecting shaft; 20. a second pawl; 21. a torsion spring; 22. an umbrella gear; 23. a hollow gear; 24. connecting grooves; 25. an infrared emitter; 26. a bump; 27. a reflective surface; 28. connecting grooves; 29. a second ratchet wheel; 30. connecting blocks; 31. a water outlet; 32. a grip; 33. a hollow tube; 34. a sleeve; 35. a telescopic rod; 36. a spring; 37. a lifting plate; 38. a filter cartridge; 39. a base plate; 40. and (7) clamping blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention based on its overall structure.

Referring to fig. 1 to 6, in an embodiment of the present invention, a telescopic filtering and pressure reducing gate valve includes a valve body 1, a first connecting pipe 2 is disposed at a top end of the valve body 1, a valve mechanism penetrating through the first connecting pipe 2 and extending into the valve body 1 is disposed above the first connecting pipe 2, a housing 6 is disposed at one side of the first connecting pipe 2 at the top end of the valve body 1, a flow monitoring mechanism penetrating into the valve body 1 is disposed inside the housing 6, one end of the valve body 1 is connected with a second connecting pipe 7, an inclined pipe 8 is connected below the second connecting pipe 7, and a filtering and pressure reducing mechanism is disposed inside the inclined pipe 8.

Please refer to fig. 1 heavily, the valve mechanism includes a handle 5 located above a first connecting pipe 2, a screw rod 4 penetrating through the first connecting pipe 2 and extending to the inside of the valve body 1 is connected to the bottom end of the handle 5, a valve plate 3 is connected to the outer wall of the screw rod 4, a connecting groove matched with the moving track of the valve plate 3 is formed in the inside of the first connecting pipe 2, an internal thread matched with the outer wall of the screw rod 4 is arranged at the joint of the valve plate 3 and the screw rod 4, the screw rod 4 is rotatably connected with the first connecting pipe 2 through a bearing, the outer side of the bottom end of the screw rod 4 is rotatably connected with the valve body 1 through a bearing, and the whole opening or closing of the device is conveniently realized through the valve mechanism.

Please refer to fig. 2 and fig. 3, the flow monitoring mechanism includes a rotary plate 15 located inside the housing 6, a circular rod 14 penetrating to the lower part of the housing 6 is connected to the bottom end of the rotary plate 15, a connecting rod 13 is connected to the lower part of the circular rod 14, a rotating rod 11 penetrating to the interior of the valve body 1 is connected to the outer wall of the connecting rod 13, a turning plate 12 is connected to the outer side of the rotating rod 11 located inside the valve body 1, a first ratchet 16 is connected to the bottom end of the rotating rod 11, a first pawl 17 is engaged with the outer side of the first ratchet 16, the flow monitoring mechanism further includes an infrared emitter 25 penetrating from the outer side of the housing 6 to the interior of the housing 6, a plurality of sets of bumps 26 are fixed to the outer wall of the rotary plate 15, a reflecting surface 27 is provided inside the bumps 26, and one end of the first pawl 17 is connected to the filtering and depressurizing mechanism through a transmission mechanism, so as to monitor the size of the water flow through the flow monitoring mechanism.

Please refer to fig. 2, the transmission mechanism includes a transmission rod 18 located at one end of the first pawl 17, a connection shaft 19 is connected to a bottom end of the transmission rod 18, a torsion spring 21 is connected to an outer wall of the connection shaft 19, a second pawl 20 is connected to the other end of the transmission rod 18, a second ratchet 29 is connected to one end of the second pawl 20, an umbrella gear 22 is connected to a top end of the second ratchet 29, and a hollow gear 23 is engaged with an outer wall of the umbrella gear 22, so as to facilitate the filtering and depressurizing mechanism to rotate by the transmission mechanism.

Please refer to fig. 5 and 6, the filtering and pressure reducing mechanism includes a ring tube 9 located on the inner wall of the inclined tube 8 and connected to the hollow gear 23, a filter cartridge 38 connected to the bottom end of the ring tube 9, a connection groove 24 provided on the outer walls of the ring tube 9 and the filter cartridge 38, a connection block 30 provided on the position where the hollow gear 23 is connected to the connection groove 24, water outlets 31 equidistantly provided inside the ring tube 9, a sealing head 10 connected to the lower portion of the inner wall of the filter cartridge 38, a bottom plate 39 connected to the bottom end of the sealing head 10, a handle 32 connected to the bottom end of the bottom plate 39, a hollow tube 33 penetrating to the bottom plate 39 provided on the bottom end of the bottom plate 39, a sleeve 34 rotatably connected to the upper portion of the outer wall of the hollow tube 33, a spring 36 connected to the inner wall of the sleeve 34, a telescopic rod 35 connected to the top end of the telescopic rod 35, a lifting plate 37 connected to the top end of the telescopic rod 35, a fixture block 40 parallel to the connection block 30 provided on the inner wall of the second connection tube 7, the water flow is conveniently filtered and decompressed through the filtering decompression mechanism.

Please refer to fig. 2 and fig. 3, the infrared emitter 25 is detachably connected to the housing 6 through a screw thread, so that the infrared emitter 25 is conveniently installed, the infrared emitter 25 is electrically connected to the pneumatic unit through the controller, so that the pneumatic unit is conveniently controlled to operate or stop operating through the infrared emitter 25 through the controller, the cross sections of the connecting rod 13 and the inner wall of the rotating rod 11 are regular polygons, so that the connecting rod 13 can drive the rotating rod 11 to rotate.

Please refer to fig. 2 and fig. 4, the bottom end of the connecting shaft 19 is rotatably connected with the inside of the valve body 1 through a bearing, so as to reduce the friction between the connecting shaft 19 and the valve body 1, a connecting groove 28 is disposed at the joint of the valve body 1 and the transmission rod 18, so as to accommodate the transmission rod 18 by the connecting groove 28, the bevel gear 22 penetrates from the inside of the valve body 1 to the position of the inner cavity of the valve body 1, so as to facilitate the top end of the bevel gear 22 to penetrate to the inner cavity of the valve body 1.

Referring again to fig. 5, the end of hollow tube 33 below bottom plate 39 is connected to a pneumatic unit via tubing to facilitate the pneumatic unit in delivering gas to hollow tube 33 or withdrawing gas from hollow tube 33.

Referring to fig. 1-5, the pneumatic unit includes a pneumatic tube, an electromagnetic valve and an air pump, the electromagnetic valve is located on the outer wall of the pneumatic tube, one end of the pneumatic tube is connected to the air pump, and the other end of the pneumatic tube is connected to the hollow tube 33 through a pipe, so that the air pressure in the sleeve 34 can be controlled conveniently through the pneumatic unit.

Please refer to fig. 6, the valve body 1 is a split sleeve structure, which is convenient for adjusting the position of one end of the valve body 1 to connect with other pipelines.

The working principle of the invention is as follows: firstly, before using the device, firstly, the annular tube 9 is inserted into the inner wall of the inclined tube 8, the annular tube 9 contacts with the inner wall of the umbrella-shaped gear 22, at this time, the connecting groove 24 is matched with the connecting block 30 to limit the annular tube 9 until the sealing head 10 contacts with the inner wall of the inclined tube 8, the handle 32 drives the bottom plate 39 and the sealing head 10 to rotate until the sealing head 10 is connected with the filter cartridge 38, at this time, the connecting groove 24 on the annular tube 9 is mutually clamped with the clamping block 40, the connecting groove 24 on the filter cartridge 38 is clamped with the clamping block 40, then, the handle 5 drives the screw rod 4 to rotate, at this time, the valve plate 3 moves upwards along the outer wall of the screw rod 4 under the action of the internal thread, at this time, the valve mechanism is opened to allow water to pass through, when water flows through the inner cavity of the valve body 1, the water flow drives the turning plate 12 to rotate, the rotation speed of the turning plate 12 is determined by water pressure, the rotating rod 11 drives the connecting rod 13 to rotate when the turning plate 12 rotates, the connecting rod 13 drives the rotating disc 15 to rotate through the round rod 14, the rotating disc 15 drives the bump 26 to rotate, the bump 26 drives the reflecting surface 27 to rotate, infrared rays emitted by the infrared emitter 25 continuously contact with different reflecting surfaces 27 and are reflected and received, the faster the rotating speed of the multiple groups of reflecting surfaces 27 is, the more reflected signals are received by the infrared emitter 25, the more electric signals are transmitted to the arithmetic circuit by the infrared emitter 25 in unit time, the speed of water flow can be calculated by the arithmetic circuit according to the receiving frequency of the electric signals in unit time, meanwhile, when the rotating rod 11 rotates, the rotating rod 11 drives the first ratchet 16 to rotate, the first ratchet 16 is matched with the torsion spring 21 to drive the first pawl 17 to continuously swing back and forth in the rotating process, the first pawl 17 drives the second pawl 20 to swing back and forth through the transmission rod 18, and the second pawl 20 can drive the second ratchet 29 to rotate, the second ratchet 29 drives the hollow gear 23 to rotate through the umbrella-shaped gear 22, the hollow gear 23 rotates to drive the filter cartridge 38 to rotate through the connecting block 30 and the connecting groove 24, so that impurities can be prevented from being accumulated at a certain position of the filter cartridge 38, in the water flow moving process, the water flow is firstly contacted with the annular pipe 9, the annular pipe 9 blocks the moving position of the water flow, then the water flow flows into the filter cartridge 38 along a gap between the inclined pipe 8 and the annular pipe 9, the lifting plate 37 is continuously extruded along with the increase of the water pressure, after reaching a critical value, the lifting plate 37 moves upwards, the spring 36 is stretched at the same time until the lifting plate 37 passes through the water outlet 31 and reaches the upper part of the water outlet 31, at the moment, the water flow flows out of the water outlet 31, because the lifting plate 37 blocks the water pressure, the water pressure of the water flow can be effectively reduced, when the flow rate monitoring mechanism senses that the flow rate is too small and is lower than a preset minimum flow rate, at this moment, the infrared emitter 25 operates through the pneumatic unit of controller control, the air pump inputs compressed air to the gas-supply pipe, it is gaseous to get into in the sleeve 34 through the handle 32 behind the gas-supply pipe, the atmospheric pressure increase in the sleeve 34, jack up the telescopic link 35, the telescopic link 35 drives the lifter plate 37 rebound, thereby reduce the resistance that the water receives, thereby improve water pressure, until after water pressure reaches predetermined pressure, at this moment, the infrared emitter 25 closes through the pneumatic unit of controller control, the air pump is closed together with the solenoid valve this moment, atmospheric pressure in the sleeve 34 keeps invariable, thereby maintain water pressure.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. Telescopic filters decompression gate valve, including valve body (1), its characterized in that, the top of valve body (1) is provided with connecting pipe (2) No. one, the top of connecting pipe (2) is provided with and runs through connecting pipe (2) and extends to the inside valve mechanism of valve body (1), one side that the top of valve body (1) is located connecting pipe (2) is provided with casing (6), the inside of casing (6) is provided with and runs through to the inside flow monitoring mechanism of valve body (1), the one end of valve body (1) is connected with connecting pipe (7) No. two, the below of connecting pipe (7) No. two is connected with pipe chute (8), the inside of pipe chute (8) is provided with filters decompression mechanism.

2. The telescopic filtering pressure-reducing gate valve as claimed in claim 1, wherein the valve mechanism comprises a handle (5) located above the first connecting pipe (2), the bottom end of the handle (5) is connected with a screw (4) which penetrates through the first connecting pipe (2) and extends into the valve body (1), the outer wall of the screw (4) is connected with a valve plate (3), a connecting groove matched with the moving track of the valve plate (3) is formed in the first connecting pipe (2), an internal thread matched with the outer wall of the screw (4) is arranged at the position where the valve plate (3) and the screw (4) are connected, the screw (4) and the first connecting pipe (2) are rotatably connected through a bearing, and the outer side of the bottom end of the screw (4) is rotatably connected with the valve body (1) through a bearing.

3. The telescopic filtering pressure reducing gate valve as claimed in claim 1, wherein the flow monitoring mechanism comprises a rotary disc (15) located inside the housing (6), a round rod (14) penetrating below the housing (6) is connected to the bottom end of the rotary disc (15), a connecting rod (13) is connected below the round rod (14), a rotating rod (11) penetrating inside the valve body (1) is connected to the outer wall of the connecting rod (13), a turning plate (12) is connected inside the valve body (1) on the outer side of the rotating rod (11), a first ratchet wheel (16) is connected to the bottom end of the rotating rod (11), a first pawl (17) is meshed to the outer side of the first ratchet wheel (16), the flow monitoring mechanism further comprises an infrared emitter (25) penetrating inside the housing (6) from the outer side of the housing (6), and a plurality of groups of bumps (26) are fixed on the outer wall of the rotary disc (15), a reflecting surface (27) is arranged inside the bump (26), and one end of the first pawl (17) is connected with the filtering and pressure reducing mechanism through a transmission mechanism.

4. The telescopic filtering decompression gate valve according to claim 3, wherein the transmission mechanism comprises a transmission rod (18) located at one end of a first pawl (17), a connecting shaft (19) is connected to the bottom end of the transmission rod (18), a torsion spring (21) is connected to the outer wall of the connecting shaft (19), a second pawl (20) is connected to the other end of the transmission rod (18), a second ratchet wheel (29) is connected to one end of the second pawl (20), an umbrella-shaped gear (22) is connected to the top end of the second ratchet wheel (29), and a hollow gear (23) is meshed with the outer wall of the umbrella-shaped gear (22).

5. The telescopic filtering pressure-reducing gate valve as claimed in claim 1, wherein the filtering pressure-reducing mechanism comprises a ring pipe (9) which is located on the inner wall of the inclined pipe (8) and connected with a hollow gear (23), the bottom end of the ring pipe (9) is connected with a filter cartridge (38), the outer walls of the ring pipe (9) and the filter cartridge (38) are provided with connecting grooves (24), the connecting block (30) is arranged at the position where the hollow gear (23) is connected with the connecting grooves (24), water outlets (31) are equidistantly arranged in the ring pipe (9), a sealing head (10) is connected below the inner wall of the filter cartridge (38), the bottom end of the sealing head (10) is connected with a bottom plate (39), the bottom end of the bottom plate (39) is connected with a handle (32), and the bottom end of the bottom plate (39) is provided with a hollow pipe (33) penetrating through to the bottom plate (39), the connecting device is characterized in that a sleeve (34) is rotatably connected above the outer wall of the hollow pipe (33), a spring (36) is connected to the inner wall of the sleeve (34), an expansion rod (35) is connected to the inner wall, located on the sleeve (34), of the top end of the spring (36), a lifting plate (37) is connected to the top end of the expansion rod (35), and a clamping block (40) parallel to the connecting block (30) is arranged on the inner wall of the second connecting pipe (7).

6. A telescopic filtering pressure-reducing gate valve according to claim 3, characterized in that the infrared emitter (25) is detachably connected with the housing (6) through a thread, the infrared emitter (25) is electrically connected with the pneumatic unit through a controller, and the cross sections of the connecting rod (13) and the inner wall of the rotating rod (11) are regular polygons.

7. A telescopic filtering and pressure reducing gate valve according to claim 4, characterized in that the bottom end of the connecting shaft (19) is rotatably connected with the inside of the valve body (1) through a bearing, a connecting groove (28) is arranged at the position where the valve body (1) is connected with the transmission rod (18), and the bevel gear (22) penetrates from the inside of the valve body (1) to the position of the inner cavity of the valve body (1).

8. Telescopic filtering pressure-reducing gate valve according to claim 5, characterised in that the end of the hollow tube (33) below the bottom plate (39) is connected to a pneumatic unit by means of a pipe.

9. The telescopic filtering pressure-reducing gate valve as claimed in claim 8, wherein the pneumatic unit comprises a gas pipe, an electromagnetic valve and an air pump, the electromagnetic valve is positioned on the outer wall of the gas pipe, one end of the gas pipe is connected with the air pump, and the other end of the gas pipe is connected with the hollow pipe (33) through a pipeline.

10. Telescopic filtering pressure-reducing gate valve according to claim 1, characterized in that the valve body (1) is a split sleeve structure.