High-durability gate valve made of ultrahigh-strength alloy material

Abstract

The invention relates to the technical field of valves, and discloses a high-durability gate valve made of an ultrahigh-strength alloy material, which comprises a shell, a connecting ring is fixedly connected to the outer wall of the shell, a motor is fixedly connected to the outer wall of the shell, and a pushing assembly is fixedly connected to the inner wall of the shell. The inner wall of the shell is further fixedly connected with a movable assembly, the valve body mechanism comprises a connecting pipe, the outer wall of the connecting pipe is fixedly connected with a connecting ring, and the end, away from the connecting ring, of the connecting pipe is fixedly connected with a first hollow column. The movable assembly is pushed out from the front of the rotating assembly, then the first push rod is started to drive the right-angle ring to close the partition plate, the speed of the process is higher than that of rotating a threaded column, and the situation that follow-up equipment breaks down due to the fact that the closing speed of the valve body is too low is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a high-durability gate valve made of ultra-high-strength alloy material. Background Art

[0002] The gate valve is a common type of valve, mainly used to cut off or connect the medium in the pipeline. The working principle of the gate valve is based on the lifting and lowering movement of the gate. The gate is usually a flat plate parallel to the flow direction of the medium. The up and down movement of the valve stem drives the gate to move up and down between the valve seats in the valve body. When the gate is fully raised, the medium in the pipeline can pass through unimpeded, and the valve is in a fully open state; when the gate is lowered and in close contact with the valve seat, the flow of the medium is cut off and the valve is in a closed state.

[0003] The patent application with application number CN202210299956.0 discloses a gate valve, which relates to the field of valve technology and solves the technical problem that there is a fluid pressure difference on both sides of the gate plate, and the sealing surface on one side is easily worn and seriously, resulting in leakage of the gate valve. The gate valve includes a valve body, a valve stem, and a gate plate connected to one end of the valve stem and used to block or open the fluid channel in the valve body. The valve stem passes through the bracket and the cylinder connected to the valve body in sequence. A displacement piece is connected to the valve stem, and a limiting part is arranged in the bracket. A displacement gap is formed between the limiting part and the top of the inner cavity of the bracket; when the gate valve is opened, the displacement piece can only move in the vertical direction along the limiting part to limit the movement of the valve stem in the vertical direction. When the gate plate rises into the cylinder and the displacement piece rises into the displacement gap, the valve stem can rotate 180° under the action of external force, and then when the gate plate descends to the position of blocking the fluid channel, the inlet sealing surface and the outlet sealing surface are exchanged. It is prevented that the fluid pressure difference on both sides of the gate plate only wears the sealing surface on one side of the gate plate, and prevents the gate valve from leaking.

[0004] When the above device is in use, the opening and closing of the valve body is controlled by rotating the threaded column. However, when a pipeline fails or leaks, the valve body needs to be closed quickly. At this time, due to the threaded column, multiple rotations are required to close the valve body switch, making the emergency closing of the valve body untimely. Summary of the invention

[0005] The object of the present invention is to provide a high-durability gate valve made of ultra-high strength alloy material to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-durability gate valve made of ultra-high-strength alloy material, comprising a shell, the outer wall of the shell is fixedly connected to a connecting ring, the outer wall of the shell is fixedly connected to a motor, the inner wall of the shell is fixedly connected to a pushing component, the inner wall of the shell is also fixedly connected to a movable component, and further comprising: The cam is connected with the valve body by the outer wall of the valve body, and the cam is connected with the valve body by the outer wall of the valve body, and the cam is connected with the valve body by the upper and lower ends of the cam.

[0007] According to the above technical solution, the pushing assembly includes a sliding column 1, the inner wall of the shell is fixedly connected to the sliding column 1, the outer wall of the sliding column 1 is movably connected with a right-angle ring, the end of the right-angle ring away from the sliding column 1 is fixedly connected with a push rod 1, and the end of the push rod 1 away from the right-angle plate is fixedly connected to the shell, wherein the pushing assembly does not directly contact the connecting column 1, so as to ensure that the right-angle ring will not affect the operation of the equipment when the equipment is operating normally.

[0008] According to the above technical solution, the rotating component includes a circular plate, the output end of the motor is fixedly connected to the circular plate, and a sliding column 2 is fixedly connected to the side of the circular plate away from the outer shell, wherein the outer wall of the sliding column 2 has a raised portion, so the rotation of the sliding column 2 can drive the threaded column to rotate, and an elastic component 1 is fixedly connected to the inner wall of the sliding column 2, and an end of the elastic component 1 away from the sliding column 2 is fixedly connected to a connecting column 2.

[0009] According to the above technical solution, the outer wall of the connecting column two is fixedly connected with baffle two, the side of the baffle two away from the connecting column two is fixedly connected with a threaded column, the inner wall of the threaded column is movably connected with the sliding column two, the end of the threaded column away from the baffle two is fixedly connected with baffle three, the inner wall of the baffle three is movably connected with the sliding column two, when the equipment is in an emergency closing state, the threaded column will move inward under the pull of the slider two, and the movable connection between the sliding column two and the threaded column provides space for the movement of the threaded column.

[0010] According to the above technical solution, the movable component includes push rod 2, the inner wall of the shell is fixedly connected to push rod 2, the end of push rod 2 away from the shell is fixedly connected to connecting plate 1, and the outer wall of connecting plate 1 is fixedly connected to U-shaped plate 2.

[0011] According to the above technical solution, the inner wall of the shell is fixedly connected with an elastic component 2, the end of the elastic component 2 away from the shell is fixedly connected with a connecting plate 2, the side of the connecting plate 2 away from the elastic component 2 is fixedly connected with a slide plate 1, the end of the slide plate 1 away from the connecting plate 2 is fixedly connected with a connecting plate 3, and the outer wall of the connecting plate 3 is fixedly connected with the slide plate 2.

[0012] According to the above technical scheme, the inner wall of the slide plate one is movably connected with the slider three, the end of the U-shaped plate two away from the connecting plate one is fixedly connected to the slider three, the inner wall of the slider three is rotatably connected with a connecting rod through a bearing, the end of the connecting rod away from the slider three is rotatably connected with a blocking plate through a bearing, the side of the connecting plate three away from the slide plate one is movably connected to the blocking plate, the outer wall of the blocking plate is fixedly connected with an elastic component three, and the end of the elastic component three away from the blocking plate is fixedly connected to the connecting plate three. When the movable component is pushed forward, the blocking plate will be moved away first so that the rotating component will not block the movement of the movable component, and then the movable component will be driven to leave from the front end of the rotating component.

[0013] According to the above technical scheme, the outer wall of the slide plate two is fixedly connected with an elastic component four, the end of the elastic component four away from the slide plate two is fixedly connected with a U-shaped plate three, the end of the U-shaped plate three away from the elastic component four is fixedly connected with a limiting column, the outer wall of the limiting column is movably connected to the slide plate one, both ends of the U-shaped plate three are rotatably connected with a connecting plate four through bearings, the end of the connecting plate four away from the U-shaped plate three is fixedly connected with a sliding column three, the outer wall of the sliding column three is connected to the slide plate two, after the movable component is pushed out, the limiting column will be embedded in the sliding block three, so that the sliding block three cannot move, so that when the movable component is reset, the blocking plate will not prevent the rotating component from being embedded in the movable component.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention sets a pushing component. When the equipment needs to be closed urgently, the movable component is pushed out from the front of the rotating component, and then the push rod is started to drive the right-angle ring to close the partition. The process is faster than the rotating threaded column, avoiding subsequent equipment failures due to the slow closing speed of the valve body.

[0015] 2. The present invention sets a rotating component. When the push component controls the device to close, the movement of the baffle 1 can drive the threaded column to move together. In this way, the threaded column will not affect the emergency closing of the baffle 1 by the push component, thereby ensuring smooth emergency closing.

[0016] 3. The present invention provides a movable component, and when the device needs to be shut down urgently, the movable component is pushed forward, so that there is no obstruction of other connections in front of the movable component, thereby ensuring the smooth implementation of the emergency shutdown.

[0017] 4. The present invention sets a movable component. After the device completes emergency shutdown, it is necessary to restore the device to a normal working state. At this time, the movable component allows the rotating component to be embedded in the movable component, and then the movable component is fixed, so as to ensure the normal operation of the device reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 is a schematic diagram of a push assembly of the present invention; Figure 4 is a schematic diagram of the valve body mechanism of the present invention; Figure 5 is a cross-sectional view of the valve body mechanism of the present invention; Figure 6 is a schematic diagram of a rotating assembly of the present invention; Figure 7 is a cross-sectional view of a rotating assembly of the present invention; Figure 8 is a schematic diagram of the active components of the present invention; Fig. 9 The present invention Figure 8 A magnified view of middle; Fig.10 It is a schematic diagram of the internal parts of the movable assembly of the present invention; In the figure: 1, housing; 101, connecting ring; 102, motor; 11, pushing assembly; 111, sliding column 1; 112, right-angle ring; 113, push rod 1; 2, valve body mechanism; 201, connecting pipe; 202, hollow column 1; 203, hollow column 2; 204, baffle 1; 205, slider 1; 206, connecting column 1; 207, connector; 208, extrusion plate; 209, right-angle plate; 2010, U-shaped plate 1; 2011, slider 2; 21, rotating assembly; 211, round plate; 212, sliding column 2; 213, elastic assembly 1; 214, Connecting column two; 215, baffle two; 216, threaded column; 217, baffle three; 22, movable component; 221, push rod two; 222, connecting plate one; 223, U-shaped plate two; 224, elastic component two; 225, connecting plate two; 226, slide plate one; 227, connecting plate three; 228, slide plate two; 229, slider three; 2210, connecting rod; 2211, elastic component three; 2212, blocking plate; 2213, elastic component four; 2214, U-shaped plate three; 2215, limiting column; 2216, connecting plate four; 2217, sliding column three. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Examples of the embodiments 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example 1: See Figure 1-Figure 5 The present invention provides a technical solution: a high-durability gate valve made of ultra-high-strength alloy material, comprising a shell 1, a connecting ring 101 is fixedly connected to the outer wall of the shell 1, a motor 102 is fixedly connected to the outer wall of the shell 1, a pushing component 11 is fixedly connected to the inner wall of the shell 1, and a movable component 22 is also fixedly connected to the inner wall of the shell 1, and further comprising: The valve body mechanism 2 includes a connecting pipe 201, the outer wall of the connecting pipe 201 is fixedly connected to the connecting ring 101, the end of the connecting pipe 201 away from the connecting ring 101 is fixedly connected to a hollow column 202, the upper and lower ends of the hollow column 202 are fixedly connected to a hollow column 203, the inner wall of the hollow column 202 is movably connected to a baffle 204, the end of the baffle 204 away from the hollow column 202 is fixedly connected to a slider 205, the outer wall of the slider 205 is movably connected to the hollow column 203, and the hollow column One end of the second 203 away from the baffle 1 204 is fixedly connected to a connecting column 1 206, and one end of the connecting column 1 206 away from the slider 1 205 is fixedly connected to a connecting head 207, the outer wall of the connecting head 207 is fixedly connected to a right-angle plate 209, the outer wall of the right-angle plate 209 is fixedly connected to a U-shaped plate 2010, and one end of the right-angle plate 209 away from the connecting head 207 is fixedly connected to a slider 2011, the inner wall of the slider 2011 is provided with a rotating component 21, and the outer wall of the hollow column 203 is fixedly connected to an extrusion plate 208.

[0023] The pushing assembly 11 includes a sliding column 111, the inner wall of the outer shell 1 is fixedly connected to the sliding column 111, the outer wall of the sliding column 111 is movably connected to a right-angle ring 112, the end of the right-angle ring 112 away from the sliding column 111 is fixedly connected to a push rod 113, and the end of the push rod 113 away from the right-angle plate 209 is fixedly connected to the outer shell 1.

[0024] The working principle of this embodiment is: when the equipment needs to be shut down urgently, first start the movable component 22 to contact the threaded column 216 to restrict the connecting column 206, and then start the push rod 113 to drive the right angle ring 112 to move. The movement drives the right angle ring 112 to move inward through the U-shaped and connecting head 207. The movement of the connecting column 206 drives the baffle 204 through the slider 205 to close the connecting pipe 201.

[0025] Example 2: Based on Example 1, please refer to Figure 6-Figure 10The rotating component 21 includes a circular plate 211, and the output end of the motor 102 is fixedly connected to the circular plate 211. A sliding column 212 is fixedly connected to the side of the circular plate 211 away from the housing 1, and an elastic component 1 213 is fixedly connected to the inner wall of the sliding column 212. An end of the elastic component 1 213 away from the sliding column 212 is fixedly connected to a connecting column 214, and an outer wall of the connecting column 214 is fixedly connected to a baffle 215. A side of the baffle 215 away from the connecting column 214 is fixedly connected to a threaded column 216, and the inner wall of the threaded column 216 is movably connected to the sliding column 212. An end of the threaded column 216 away from the baffle 215 is fixedly connected to a baffle 3 217, and the inner wall of the baffle 3 217 is movably connected to the sliding column 212. After the movable component leaves the front of the connecting column 2, the movement of the connecting column 1 will drive the threaded column to move together through the right-angle plate and the slider 2, and at this time, the sliding column 2 will be pulled out of the threaded column.

[0026] The movable component 22 includes a push rod 221, the inner wall of the housing 1 is fixedly connected to the push rod 221, the end of the push rod 221 away from the housing 1 is fixedly connected to a connecting plate 222, the outer wall of the connecting plate 222 is fixedly connected to a U-shaped plate 223, the inner wall of the housing 1 is fixedly connected to an elastic component 224, the end of the elastic component 224 away from the housing 1 is fixedly connected to a connecting plate 225, and the side of the connecting plate 225 away from the elastic component 224 is fixedly connected to The slide plate 1 226, one end of the slide plate 1 226 away from the connecting plate 2 25 is fixedly connected to the connecting plate 3 227, the outer wall of the connecting plate 3 227 is fixedly connected to the slide plate 2 28, the inner wall of the slide plate 1 226 is movably connected to the slider 3 229, the end of the U-shaped plate 223 away from the connecting plate 1 222 is fixedly connected to the slider 3 229, the inner wall of the slider 3 229 is rotatably connected to the connecting rod 2210 through the bearing, and the connecting rod 2210 is away from the slider 3 229 One end is rotatably connected to a blocking plate 2212 through a bearing, a side of a connecting plate 3 227 away from a slide plate 1 226 is movably connected to the blocking plate 2212, an outer wall of the blocking plate 2212 is fixedly connected to an elastic component 3 2211, an end of the elastic component 3 2211 away from the blocking plate 2212 is fixedly connected to the connecting plate 3 227, an outer wall of the slide plate 228 is fixedly connected to an elastic component 4 2213, an end of the elastic component 4 2213 away from the slide plate 228 is fixedly connected A U-shaped plate three 2214 is connected, and one end of the U-shaped plate three 2214 away from the elastic component four 2213 is fixedly connected to a limiting column 2215, and the outer wall of the limiting column 2215 is movably connected to the slide plate one 226. Both ends of the U-shaped plate three 2214 are rotatably connected to connecting plates four 2216 through bearings, and one end of the connecting plate four 2216 away from the U-shaped plate three 2214 is fixedly connected to a sliding column three 2217, and the outer wall of the sliding column three 2217 is connected to the slide plate two 228.

[0027] The working principle of this embodiment is as follows: when the equipment needs to be closed urgently, the push rod 221 will be started to drive the connecting plate 1 222 to move. Since the connecting column 214 in the rotating component 21 is embedded between the connecting plate 3 227 and the blocking plate 2212, the moving connecting plate 1 222 drives the slider 3 229 to move along the trajectory of the slide plate 1 226 through the U-shaped plate 223, and the moving slider 3 229 will drive the blocking plate 2212 to move toward the middle through the connecting rod 2210. At this time, the connecting plate 3 227 is no longer restricted by the selection component, so the movement of the U-shaped plate 223 will push the connecting plate 3 227 to move. At this time, the sliding column 3 2217 is no longer restricted by the extrusion plate 208. The limiting column 2215 is embedded in the slider 3 229 through the elastic component 4 2213 to lock the position of the slider 3 229. With the movement of the connecting plate 3 227, space is provided for the extension of the rotating component 21 and the movement of the baffle 1 204, which facilitates the emergency closure of the equipment.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-durability gate valve made of ultra-high-strength alloy material, comprising a housing (1), an outer wall of the housing (1) being fixedly connected to a connecting ring (101), an outer wall of the housing (1) being fixedly connected to a motor (102), an inner wall of the housing (1) being fixedly connected to a pushing component (11), and an inner wall of the housing (1) being further fixedly connected to a movable component (22), characterized in that: Also includes: A valve body mechanism (2), the valve body mechanism (2) comprising a connecting tube (201), the outer wall of the connecting tube (201) being fixedly connected to a connecting ring (101), the end of the connecting tube (201) away from the connecting ring (101) being fixedly connected to a hollow column one (202), the upper and lower ends of the hollow column one (202) being fixedly connected to a hollow column two (203), the inner wall of the hollow column one (202) being movably connected to a baffle plate one (204), the end of the baffle plate one (204) away from the hollow column one (202) being fixedly connected to a slider one (205), the outer wall of the slider one (205) being movably connected to the hollow column two (203), the hollow column one (202) being fixedly connected to a slider one (205), the outer wall of the slider one (205) being movably connected to the hollow column two (203), the inner wall of ... fixedly connected to the hollow column two (203), the inner wall of the hollow column one (202) being fixedly connected to a connecting ring (101), the outer wall of the slider one (205) being fixedly connected to the hollow column two (203), the inner wall of the hollow column one (202) being fixedly connected to a connecting ring (101), the outer wall of the slider one (205) being fixedly connected to the hollow column two (203), the inner wall of the hollow column one (202) being fixedly connected to a connecting ring (101), the outer wall of the slider one (205) being fixedly connected to the hollow column two ( One end of the core column 2 (203) away from the baffle plate 1 (204) is fixedly connected to a connecting column 1 (206); one end of the connecting column 1 (206) away from the slider 1 (205) is fixedly connected to a connecting head (207); an outer wall of the connecting head (207) is fixedly connected to a right-angle plate (209); an outer wall of the right-angle plate (209) is fixedly connected to a U-shaped plate 1 (2010); one end of the right-angle plate (209) away from the connecting head (207) is fixedly connected to a slider 2 (2011); a rotating assembly (21) is provided on the inner wall of the slider 2 (211); and an outer wall of the hollow column 2 (203) is fixedly connected to an extrusion plate (208).

2. A high-durability gate valve made of ultra-high-strength alloy material according to claim 1, characterized in that: The pushing assembly (11) comprises a sliding column (111), the inner wall of the outer shell (1) is fixedly connected to the sliding column (111), the outer wall of the sliding column (111) is movably connected to a right-angle ring (112), one end of the right-angle ring (112) away from the sliding column (111) is fixedly connected to a push rod (113), and one end of the push rod (113) away from the right-angle plate (209) is fixedly connected to the outer shell (1).

3. A high-durability gate valve made of ultra-high-strength alloy material according to claim 2, characterized in that: The rotating assembly (21) comprises a circular plate (211), the output end of the motor (102) is fixedly connected to the circular plate (211), a side of the circular plate (211) away from the housing (1) is fixedly connected to a second sliding column (212), an inner wall of the second sliding column (212) is fixedly connected to an elastic assembly (213), and an end of the elastic assembly (213) away from the second sliding column (212) is fixedly connected to a second connecting column (214).

4. A high-durability gate valve made of ultra-high-strength alloy material according to claim 3, characterized in that: The outer wall of the second connecting column (214) is fixedly connected to the second baffle plate (215); the side of the second baffle plate (215) away from the second connecting column (214) is fixedly connected to the threaded column (216); the inner wall of the threaded column (216) is movably connected to the second sliding column (212); the end of the threaded column (216) away from the second baffle plate (215) is fixedly connected to the third baffle plate (217); the inner wall of the third baffle plate (217) is movably connected to the second sliding column (212).

5. A high-durability gate valve made of ultra-high-strength alloy material according to claim 4, characterized in that: The movable component (22) comprises a second push rod (221), the inner wall of the outer shell (1) is fixedly connected to the second push rod (221), one end of the second push rod (221) away from the outer shell (1) is fixedly connected to a first connecting plate (222), and the outer wall of the first connecting plate (222) is fixedly connected to a second U-shaped plate (223).

6. A high-durability gate valve made of ultra-high-strength alloy material according to claim 5, characterized in that: The inner wall of the shell (1) is fixedly connected to an elastic component 2 (224); the end of the elastic component 2 (224) away from the shell (1) is fixedly connected to a connecting plate 2 (225); the side of the connecting plate 2 (225) away from the elastic component 2 (224) is fixedly connected to a slide plate 1 (226); the end of the slide plate 1 (226) away from the connecting plate 2 (225) is fixedly connected to a connecting plate 3 (227); and the outer wall of the connecting plate 3 (227) is fixedly connected to a slide plate 2 (228).

7. A high-durability gate valve made of ultra-high-strength alloy material according to claim 6, characterized in that: The inner wall of the slide plate one (226) is movably connected to a slider three (229); the end of the U-shaped plate two (223) away from the connecting plate one (222) is fixedly connected to the slider three (229); the inner wall of the slider three (229) is rotatably connected to a connecting rod (2210) via a bearing; the end of the connecting rod (2210) away from the slider three (229) is rotatably connected to a blocking plate (2212) via a bearing; the side of the connecting plate three (227) away from the slide plate one (226) is movably connected to the blocking plate (2212); the outer wall of the blocking plate (2212) is fixedly connected to an elastic component three (2211); the end of the elastic component three (2211) away from the blocking plate (2212) is fixedly connected to the connecting plate three (227).

8. A high-durability gate valve made of ultra-high-strength alloy material according to claim 7, characterized in that: The outer wall of the second slide plate (228) is fixedly connected with an elastic component four (2213), and the end of the elastic component four (2213) away from the second slide plate (228) is fixedly connected with a U-shaped plate three (2214), and the end of the U-shaped plate three (2214) away from the elastic component four (2213) is fixedly connected with a limiting column (2215), and the outer wall of the limiting column (2215) is movably connected to the first slide plate (226), and both ends of the U-shaped plate three (2214) are rotatably connected with a connecting plate four (2216) through bearings, and the end of the connecting plate four (2216) away from the U-shaped plate three (2214) is fixedly connected with a sliding column three (2217), and the outer wall of the sliding column three (2217) is connected to the second slide plate (228).

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