Lifting switch valve

Abstract

The utility model relates to a lifting switch valve which comprises a material conveying pipeline assembly, a lifting mechanism and a switch valve assembly, a material channel is arranged in the material conveying pipeline assembly, a corrugated pipe is arranged on the material channel, and the material channel is stretched or shortened in the material conveying direction by stretching or shortening the corrugated pipe; the lifting mechanism comprises a left lifting air cylinder and a right lifting air cylinder, lifting piston rods of the left lifting air cylinder and the right lifting air cylinder are arranged on the corrugated pipe and located on the two sides of the material channel correspondingly, and the lifting piston rods are used for stretching or compressing the corrugated pipe so that the material conveying pipeline assembly can be stretched or shortened in the material conveying direction; the switch valve assembly comprises a switch flashboard, a flashboard piston rod connecting piece and a horizontal air cylinder, the switch flashboard is movably inserted in the material channel and can block or open the material channel to form a closed state or an open state, and the switch flashboard is in butt joint with a horizontal piston rod of the horizontal air cylinder through the flashboard piston rod connecting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of rare earth processing technology and equipment, and particularly relates to a lifting switch valve. Background Art

[0002] The negative pressure feeding, weighing and feeding integrated machine is a machine that integrates multiple functions such as feeding, weighing and external feeding of powder in a negative pressure environment, including a silo, a housing and a feeder. The silo is cylindrical and is suspended on the housing through a weighing sensor. And the silo is configured with a vacuum pipeline, and the vacuum pipeline is docked with a vacuum pump. The powder is fed into the silo in a negative pressure environment, weighed at the same time, and then the solid materials in the airflow with the material of the feeder are transported out.

[0003] During the processing of rare earth raw materials, it is necessary to first enter the silo of the negative pressure feeding, weighing and feeding integrated machine, be weighed while feeding in a negative pressure environment, and then flow out of the silo of the negative pressure feeding, weighing and feeding integrated machine and transport the weighed rare earth raw materials downward to an electrolytic furnace.

[0004] Then, during the process of flowing out of the electrolytic furnace from the silo of the negative pressure feeding, weighing and feeding integrated machine, it is necessary not only to be docked upward with the silo, but also to be docked downward with the electrolytic furnace, and at the same time to control the output of the material. Currently, there is a lack of such a switch valve that can be telescoped up and down. Content of the Utility Model

[0005] In view of the above problems, the purpose of the utility model is to provide a lifting switch valve, which is arranged on the material conveying pipe connecting the silo and the electrolytic furnace, and is used to solve the problem that there is currently a lack of a switch valve that not only needs to be docked upward with the silo, but also needs to be docked downward with the electrolytic furnace, and at the same time control the output of the material.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses a lifting switch valve, including:

[0008] A material conveying pipeline assembly, which is internally provided with a material channel, and a corrugated pipe is arranged on the material channel, and the elongation or shortening of the material channel in the material conveying direction is realized by elongating or shortening the corrugated pipe;

[0009] A lifting mechanism, including a left lifting cylinder and a right lifting cylinder. The left lifting cylinder and the right lifting cylinder both include lifting piston rods. The lifting piston rods of the left lifting cylinder and the right lifting cylinder are both arranged on the corrugated pipe and are respectively located on both sides of the material channel, and are used to stretch or compress the corrugated pipe to make the material conveying pipeline assembly elongate or shorten in the material conveying direction;

[0010] The switching valve assembly includes a switching gate, a gate piston rod connecting member, and a horizontal cylinder. The horizontal cylinder includes a horizontal piston rod. The switching gate is movably inserted into the material passage and can block or open the material passage to form a closed state or an open state respectively. The switching gate is docked with the horizontal piston rod of the horizontal cylinder through the gate piston rod connecting member.

[0011] When the two ends of the material conveying pipeline assembly need to be docked upward and downward respectively, the lifting piston rods of the left lifting cylinder and the right lifting cylinder move downward simultaneously, pushing the corrugated pipe to elongate, so that the material conveying pipeline assembly elongates in the material conveying direction; after the docking is completed, the lifting piston rods of the left lifting cylinder and the right lifting cylinder move upward simultaneously to pull the corrugated pipe to shorten, so that the material conveying pipeline assembly shortens in the material conveying direction, realizing the stable docking of the material conveying pipeline assembly upward and downward.

[0012] When it is necessary to control whether the material flows in the material passage or not, the horizontal cylinder controls the horizontal piston rod to extend or retract, pushing or pulling the switching gate into or out of the material passage, so as to block the material passage into a closed state or open it into an open state.

[0013] Preferably, the material conveying pipeline assembly further includes a feed pipe, an inner sleeve, a discharge pipe, and a sealing ring. The bottom end of the feed pipe is fixedly connected to the top end of the inner sleeve. The top end of the discharge pipe is fixedly connected to the bottom end of the corrugated pipe. The inner sleeve is movably inserted into the corrugated pipe, and the bottom end of the inner sleeve extends into the top end of the discharge pipe. The joint between the bottom end of the inner sleeve and the top end of the discharge pipe is sealed by a sealing ring. Wherein, a material passage for conveying materials is formed from top to bottom inside the feed pipe, the inner sleeve, and the discharge pipe in sequence.

[0014] Preferably, a fixed plate and a movable plate are respectively arranged at the top end and the bottom end of the corrugated pipe. The left lifting cylinder and the right lifting cylinder also each include a cylinder body, an end cover, and a lifting piston. Each cylinder body is provided with an end cover, and the end covers of the left lifting cylinder and the right lifting cylinder are both arranged on the fixed plate. The lifting piston is arranged inside the cylinder body, and each lifting piston is provided with a lifting piston rod. The lifting piston rod passes through the end cover, the fixed plate, and the corrugated pipe from top to bottom in sequence until it is fixedly connected to the movable plate.

[0015] When the lifting pistons of the left lifting cylinder and the right lifting cylinder push the lifting piston rods to move downward or pull the lifting piston rods to move upward, the lifting piston rods drive the movable plate to move downward or upward respectively, thereby realizing the stretching or compression of the corrugated pipe.

[0016] Preferably, a flange is configured at the top port of the inner sleeve, and a flange joint is configured on the flange; an upper clamp is configured at the top of the feed pipe, a flange is configured on the flange joint, the top of the inner sleeve is inserted into the flange of the flange joint, and the two are clamped tightly by the upper clamp.

[0017] Preferably, a housing is disposed outside the horizontal cylinder, the housing is disposed on the fixed plate, and the housing is perpendicular to the material conveying direction of the material passage; the horizontal cylinder further includes a horizontal end cover and a horizontal piston, the horizontal end cover is disposed in the housing to jointly form a horizontal cylinder body with the housing, the horizontal piston is disposed in the horizontal cylinder body, and the horizontal piston is configured with a horizontal piston rod, the horizontal piston rod passes through the horizontal end cover and is docked with the switch gate through a gate piston rod connecting member; the switch gate is vertically inserted into the inner sleeve, and when the switch gate completely extends into the inner sleeve, it can just horizontally block the inner sleeve.

[0018] Preferably, switch gate grooves and horizontal piston rod grooves are respectively disposed at both ends of the gate piston rod connecting member, and the switch gate is disposed in the switch gate groove of the gate piston rod connecting member; the horizontal piston rod is inserted into the horizontal piston rod groove of the gate piston rod connecting member.

[0019] Preferably, the left lifting cylinder, the right lifting cylinder and the horizontal cylinder are all configured with air inlets.

[0020] Preferably, a lower clamp is configured at the bottom end of the discharge pipe.

[0021] Preferably, the sealing ring is a polytetrafluoroethylene sealing ring.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] (1) The present utility model discloses a lifting switch valve. The feed pipe is used to dock with the bin of the negative pressure feeding weighing feeder, and the discharge pipe is used to dock with the feeding chute facing the electrolytic furnace. In order to respectively dock upward with the bin of the negative pressure feeding weighing feeder and downward with the feeding chute, first, the lifting piston rods of the left lifting cylinder and the right lifting cylinder move downward simultaneously, pushing the corrugated pipe to elongate, so that the material conveying pipe assembly elongates in the vertical direction; after the docking is completed, the lifting piston rods of the left lifting cylinder and the right lifting cylinder move upward simultaneously, pulling the corrugated pipe to shorten, so that the material conveying pipe assembly shortens in the material conveying direction, realizing the stable docking of the material conveying pipe assembly upward and downward.

[0024] (II) The lifting switch valve disclosed in the utility model is a switch valve, and its switch valve assembly includes a switch gate, a gate piston rod connector and a horizontal cylinder, the horizontal cylinder includes a horizontal piston rod, the switch gate is movably inserted in the material channel and can block or open the material channel to form a closed state or an open state respectively, and the switch gate is connected to the horizontal piston rod of the horizontal cylinder through the gate piston rod connector. When it is necessary to control whether the material flows in the material channel, the horizontal piston rod of the horizontal cylinder extends or retracts, pushing or pulling the switch gate to enter or exit the material channel, so as to achieve the blocking of the material channel into a closed state or opening into an open state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional view of the lifting switch valve provided in Example 1 of the utility model;

[0026] Figure 2 This is a front view of the lifting switch valve provided in Example 1 of the utility model;

[0027] Figure 3 It is a side view of the lifting switch valve provided in Example 1 of the utility model;

[0028] Figure 4 It is a top view of the lifting switch valve provided in Example 1 of the utility model;

[0029] Figure 5 It is a schematic diagram of the lifting switch valve provided in Example 1 of the utility model applied to the feeding pipe connecting the negative pressure loading, weighing and feeding integrated machine and the electrolytic furnace.

[0030] Description of reference numerals:

[0031] 11-feeding pipe, 110-upper clamp, 12-inner sleeve, 120-flange, 121-flange joint; 13-discharging pipe, 130-lower clamp, 14-bellows, 141-fixed plate, 142-movable plate, 15-sealing ring;

[0032] 21-left lifting cylinder, 22-right lifting cylinder, 200-end cover, 201-lifting piston, 202-lifting piston rod;

[0033] Switch valve mechanism; 30-switch gate; 31-gate piston rod connecting piece; 32-horizontal cylinder, 320-horizontal end cover, 321-horizontal piston, 322-horizontal piston rod; 33-housing;

[0034] 100-Air intake. DETAILED DESCRIPTION

[0035] Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be completely conveyed to those skilled in the art.

[0036] In order to solve the problem of the current lack of a switching valve that not only needs to be docked with the silo upwards, but also needs to be docked with the electrolytic furnace downwards, and at the same time control the output of the material, the present utility model discloses a lifting switching valve. The feed pipe is used to dock with the silo of the negative pressure feeding and weighing feeder, and the discharge pipe is used to dock with the feed chute facing the electrolytic furnace. In order to dock with the silo of the negative pressure feeding and weighing feeder upwards and the feed chute downwards respectively, first, the lifting piston rods of the left lifting cylinder and the right lifting cylinder move downward simultaneously, pushing the bellows to elongate, so that the material conveying pipe assembly elongates in the vertical direction; after the docking is completed, the lifting piston rods of the left lifting cylinder and the right lifting cylinder move upward simultaneously, pulling the bellows to shorten, so that the material conveying pipe assembly shortens in the material conveying direction, realizing the stable docking of the material conveying pipe assembly upwards and downwards.

[0037] Embodiment 1

[0038] Embodiment 1 of the present utility model discloses a lifting switching valve, and its structure will be described in detail below.

[0039] Reference Figures 1 to 3 , the lifting switching valve includes a material conveying pipe assembly, a lifting mechanism and a switching valve assembly.

[0040] A material passage is configured in the material conveying pipe assembly, and a bellows 14 is configured on the material passage, and the elongation or shortening of the material passage in the material conveying direction is realized by elongating or shortening the bellows 14.

[0041] The lifting mechanism includes a left lifting cylinder 21 and a right lifting cylinder 22. Both the left lifting cylinder 21 and the right lifting cylinder 22 include lifting piston rods 202. The lifting piston rods 202 of the left lifting cylinder 21 and the right lifting cylinder 22 are both arranged on the bellows 14 and are respectively located on both sides of the material passage, and are used to make the material conveying pipe assembly elongate or shorten in the material conveying direction by stretching or compressing the bellows 14.

[0042] The switching valve assembly includes a switching gate plate 30, a gate plate piston rod connecting piece 31 and a horizontal cylinder 32. The horizontal cylinder 32 includes a horizontal piston rod 322. The switching gate plate 30 is horizontally movably inserted into the material passage and can block or open the material passage to form a closed state or an open state respectively. The switching gate plate 30 is docked with the horizontal piston rod 322 of the horizontal cylinder 32 through the gate plate piston rod connecting piece 31.

[0043] When the two ends of the material conveying pipeline assembly need to be docked upward and downward respectively, the lifting piston rods 202 of the left lifting cylinder 21 and the right lifting cylinder 22 move downward simultaneously, pushing the bellows 14 to elongate, so that the material conveying pipeline assembly elongates in the material conveying direction; after the docking is completed, the lifting piston rods 202 of the left lifting cylinder 21 and the right lifting cylinder 22 move upward simultaneously to pull the bellows 14 to shorten, so that the material conveying pipeline assembly shortens in the material conveying direction, realizing the stable docking of the material conveying pipeline assembly upward and downward;

[0044] When it is necessary to control whether the material flows through the material passage or not, the horizontal piston rod 322 of the horizontal cylinder 32 extends or retracts, pushing or pulling the switch gate plate 30 into or out of the material passage, realizing that the material passage is blocked and enters the closed state or is opened and enters the open state.

[0045] It should be noted that the material conveying direction generally refers to the length direction of the material conveying pipeline assembly. Since the negative pressure feeding weighing feeder is located at a high place and the electrolytic furnace is located at a low place, therefore, the most preferred way of the material conveying direction is the vertical direction.

[0046] Specifically, the material conveying pipeline assembly further includes a feed pipe 11, an inner sleeve 12, a discharge pipe 13 and a sealing ring 15. The bottom end of the feed pipe 11 is fixedly connected to the top end of the inner sleeve 12. The top end of the discharge pipe 13 is fixedly connected to the bottom end of the bellows 14. The inner sleeve 12 is movably inserted into the bellows 14, and the bottom end of the inner sleeve 12 extends into the top end of the discharge pipe 13. The joint of the bottom end of the inner sleeve 12 and the top end of the discharge pipe 13 is sealed by the sealing ring 15; wherein, a material passage for conveying materials is formed from top to bottom inside the feed pipe 11, the inner sleeve 12 and the discharge pipe 13 in sequence.

[0047] Specifically, the sealing ring 15 is a polytetrafluoroethylene sealing ring.

[0048] Specifically, a fixed plate 141 and a movable plate 142 are respectively arranged at the top end and the bottom end of the bellows 14,

[0049] The left lifting cylinder 21 and the right lifting cylinder 22 also both include a cylinder body, an end cover 200, and a lifting piston 201,

[0050] Each cylinder body is provided with an end cover 200, and the end covers 200 of the left lifting cylinder 21 and the right lifting cylinder 22 are both arranged on the fixed plate 141;

[0051] The lifting piston 201 is arranged inside the cylinder body, and each lifting piston 201 is provided with a lifting piston rod 202. The lifting piston rod 202 passes through the end cover 200, the fixed plate 141 and the bellows 14 from top to bottom in sequence until it is fixedly connected to the movable plate 142;

[0052] When the lifting pistons 201 of the left lifting cylinder 21 and the right lifting cylinder 22 push the lifting piston rod 202 downward or pull the lifting piston rod 202 upward, the lifting piston rod 202 drives the movable plate 142 to move downward or upward respectively, thereby achieving the stretching or compression of the bellows 14.

[0053] Preferably, the bottom end of the feed pipe 11 is fixedly connected to the top end of the inner sleeve 12 by a flange connection. As a specific embodiment, the top end port of the inner sleeve 12 is provided with a flange 120, and the flange 120 is provided with a flange joint 121; the top end of the feed pipe 11 is provided with an upper clamp 110, and the flange joint 121 is provided with a flange, and the top end of the inner sleeve 12 is inserted into the flange of the flange joint 121, and the two are clamped by the upper clamp 110.

[0054] Specifically, a shell 33 is disposed outside the horizontal cylinder 32, and the shell 33 is disposed on the fixed plate 141, and the shell 33 is perpendicular to the material conveying direction of the material channel;

[0055] The horizontal cylinder 32 further includes a horizontal end cover 320 and a horizontal piston 321. The horizontal end cover 320 is arranged in the housing 33 and together with the housing 33 forms a horizontal cylinder body. The horizontal piston 321 is arranged in the horizontal cylinder body, and the horizontal piston 321 is equipped with a horizontal piston rod 322. The horizontal piston rod 322 passes through the horizontal end cover 320 and is connected to the switch gate 30 through the gate piston rod connector 31.

[0056] The switch gate 30 is vertically inserted into the inner sleeve 12 , and when the switch gate 30 is fully inserted into the inner sleeve 12 , it can just block the inner sleeve 12 laterally.

[0057] Specifically, a switch gate groove and a horizontal piston rod groove are respectively provided at both ends of the gate piston rod connecting piece 31, and the switch gate 30 is arranged in the switch gate groove of the gate piston rod connecting piece 31; the horizontal piston rod 322 is inserted in the horizontal piston rod groove of the gate piston rod connecting piece 31; thus, the horizontal piston rod 322 is detachably connected with the switch gate 30 through the gate piston rod connecting piece 31.

[0058] In order to introduce gas into the cylinder, as common knowledge, the left lifting cylinder 21, the right lifting cylinder 22 and the horizontal cylinder 32 are all equipped with an air inlet 100, and the air inlet is equipped with an air inlet pipe, and the air inlet is equipped with an air inlet valve, wherein the air inlet valve is preferably an electromagnetic valve. When the lifting switch valve is equipped with a controller, the air inlet valves of the left lifting cylinder 21, the right lifting cylinder 22 and the horizontal cylinder 32 are respectively connected to the controller by wire, thereby respectively realizing the control of the left lifting cylinder 21, the right lifting cylinder 22 and the horizontal cylinder 32. Since this part is common knowledge, it will not be repeated here.

[0059] To facilitate the docking with the blanking chute, a lower clamp 130 is configured at the bottom end of the discharge pipe 13.

[0060] Among them, the feed pipe 11 is used to dock with the silo of the negative pressure feeding and weighing feeder, and the bottom end of the blanking chute faces the electrolytic furnace, as Figure 5 shown.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A lifting switch valve, characterized in that: include: A material conveying pipeline component, wherein a material channel is arranged inside the material channel, and a bellows (14) is arranged on the material channel, and the material channel is extended or shortened in the material conveying direction by extending or shortening the bellows (14); A lifting mechanism, comprising a left lifting cylinder (21) and a right lifting cylinder (22), wherein the left lifting cylinder (21) and the right lifting cylinder (22) both comprise lifting piston rods (202), and the lifting piston rods (202) of the left lifting cylinder (21) and the right lifting cylinder (22) are both arranged on the bellows (14) and are respectively located on both sides of the material channel, and are used to extend or shorten the material delivery pipeline assembly in the material delivery direction by stretching or compressing the bellows (14); The switch valve assembly comprises a switch gate (30), a gate piston rod connecting piece (31) and a horizontal cylinder (32), wherein the horizontal cylinder (32) comprises a horizontal piston rod (322), the switch gate (30) is movably inserted in the material channel and can block or open the material channel to form a closed state or an open state respectively, and the switch gate (30) is butt-jointed with the horizontal piston rod (322) of the horizontal cylinder (32) via the gate piston rod connecting piece (31).

2. The lifting switch valve according to claim 1, characterized in that: When the two ends of the material delivery pipeline assembly need to be docked upward and downward respectively, the lifting piston rods (202) of the left lifting cylinder (21) and the right lifting cylinder (22) move downward at the same time, pushing the bellows (14) to extend, so that the material delivery pipeline assembly extends in the material delivery direction; after the docking is completed, the lifting piston rods (202) of the left lifting cylinder (21) and the right lifting cylinder (22) move upward at the same time, pulling the bellows (14) to shorten, so that the material delivery pipeline assembly shortens in the material delivery direction, and realizing the stable docking of the material delivery pipeline assembly upward and downward; When it is necessary to control whether the material flows through the material channel, the horizontal cylinder (32) controls the horizontal piston rod (322) to extend or retract, pushing or pulling the switch gate (30) to enter or exit the material channel, thereby sealing the material channel to enter a closed state or opening it to enter an open state.

3. The lifting switch valve according to claim 1, characterized in that: The material conveying pipeline assembly also includes a feed pipe (11), an inner sleeve (12), a discharge pipe (13) and a sealing ring (15); the bottom end of the feed pipe (11) is fixedly connected to the top end of the inner sleeve (12); the top end of the discharge pipe (13) is fixedly connected to the bottom end of the corrugated pipe (14); the inner sleeve (12) is movably inserted into the corrugated pipe (14); the bottom end of the inner sleeve (12) extends into the top end of the discharge pipe (13); the junction between the bottom end of the inner sleeve (12) and the top end of the discharge pipe (13) is sealed by the sealing ring (15); wherein the insides of the feed pipe (11), the inner sleeve (12) and the discharge pipe (13) form a material channel for conveying materials in sequence from top to bottom.

4. The lifting switch valve according to claim 3, characterized in that: The top and bottom ends of the bellows (14) are respectively provided with a fixed plate (141) and a movable plate (142). The left lifting cylinder (21) and the right lifting cylinder (22) also each include a cylinder body, an end cover (200), and a lifting piston (201). Each cylinder body is provided with an end cover (200), and the end covers (200) of the left lifting cylinder (21) and the right lifting cylinder (22) are both arranged on the fixing plate (141); The lifting piston (201) is arranged in the cylinder body, and each lifting piston (201) is equipped with a lifting piston rod (202), and the lifting piston rod (202) passes through the end cover (200), the fixed plate (141) and the bellows (14) from top to bottom until it is fixedly connected with the movable plate (142); When the lifting pistons (201) of the left lifting cylinder (21) and the right lifting cylinder (22) push the lifting piston rod (202) downward or pull the lifting piston rod (202) upward, the lifting piston rod (202) drives the movable plate (142) to move downward or upward respectively, thereby achieving the stretching or compression of the bellows (14).

5. The lifting switch valve according to claim 4, characterized in that: The top end port of the inner sleeve (12) is provided with a flange (120), and the flange (120) is provided with a flange joint (121); The top end of the feed pipe (11) is provided with an upper clamp (110), and the flange joint (121) is provided with a flange. The top end of the inner sleeve (12) is inserted into the flange of the flange joint (121), and the two are clamped together by an upper clamp (110).

6. The lifting switch valve according to claim 5, characterized in that: The horizontal cylinder (32) is provided with a shell (33) outside, the shell (33) is arranged on the fixed plate (141), and the shell (33) is perpendicular to the material conveying direction of the material channel; The horizontal cylinder (32) further comprises a horizontal end cover (320) and a horizontal piston (321). The horizontal end cover (320) is arranged in the housing (33) and together with the housing (33) forms a horizontal cylinder body, the horizontal piston (321) is arranged in the horizontal cylinder body, and the horizontal piston (321) is provided with a horizontal piston rod (322), and the horizontal piston rod (322) passes through the horizontal end cover (320) and is connected to the switch gate (30) through the gate piston rod connector (31); The switch gate (30) is vertically inserted into the inner sleeve (12), and when the switch gate (30) is fully inserted into the inner sleeve (12), it can just block the inner sleeve (12) laterally.

7. The lifting switch valve according to claim 6, characterized in that: The two ends of the gate piston rod connecting piece (31) are respectively provided with a switch gate slot and a horizontal piston rod slot. The switch gate (30) is arranged in the switch gate groove of the gate piston rod connecting piece (31); The horizontal piston rod (322) is inserted into the horizontal piston rod groove of the gate piston rod connecting piece (31).

8. The lifting switch valve according to claim 1, characterized in that: The left lifting cylinder (21), the right lifting cylinder (22) and the horizontal cylinder (32) are all provided with air inlet holes (100).

9. The lifting switch valve according to claim 3, characterized in that: The bottom end of the discharge pipe (13) is provided with a lower clamp (130).

10. The lifting switch valve according to claim 3, characterized in that: The sealing ring (15) is a polytetrafluoroethylene sealing ring.

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