Spraying equipment for valve surface anti-corrosion treatment

Abstract

The invention discloses spraying equipment for valve surface anti-corrosion treatment in the technical field of valve spraying, and the spraying equipment comprises a workbench and further comprises two frame bodies which are movably mounted at the top of the workbench and are symmetrically arranged; the spray pipe is in a hollow semi-cylindrical shape, and a paint nozzle is formed in the top of the spray pipe; the two spraying pipes are located on the inner sides of the two frame bodies correspondingly. The first driving part is used for driving the spraying pipes to do linear motion and rotary motion along the horizontal axis of the valve, and the two spraying pipes can be combined into a complete cylinder after moving to the position below the vertical section of the valve; the second driving part is used for driving the two combined spray pipes to do linear motion and rotary motion along the vertical axis of the valve; the paint supply mechanism is used for conveying paint into the spray pipe; the spraying device can greatly improve the spraying efficiency of the valve.

Description

Technical Field

[0001] The invention relates to the technical field of valve spraying, in particular to spraying equipment for anti-corrosion treatment of valve surfaces. Background Art

[0002] The valve body is the outer shell of the valve and the flow channel of the fluid. The two ends of the valve body can be connected to the pipeline and is the main structure of the valve. The valve body is generally designed to be T-shaped, and the inner wall of the valve body needs to be sprayed with paint to prevent corrosion of the inner wall of the valve body. When spraying the inner wall of the valve body, the spraying equipment sprays from the three openings of the valve body in sequence, which is inefficient. In order to spray the paint evenly, the valve body needs to be firmly fixed so that the spray head can move along the horizontal and vertical axes of the valve body. The installation and disassembly of the valve body is difficult, which will greatly reduce the efficiency of valve body processing. Summary of the invention

[0003] The object of the present invention is to provide a spraying device for anti-corrosion treatment of valve surface to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spraying device for anti-corrosion treatment of valve surface, comprising a workbench and a frame, which is movably installed on the top of the workbench and is arranged to be symmetrical; a nozzle is arranged to be a hollow semi-cylindrical shape, and a paint nozzle is opened on the top; the nozzle is arranged to be two and respectively located on the inner sides of two frames; a first driving member is used to drive the nozzle to perform linear motion and rotational motion along the horizontal axis of the valve, and the two nozzles can be combined into a complete cylindrical shape after moving to the bottom of the vertical section of the valve; a second driving member is used to drive the two combined nozzles to perform linear motion and rotational motion along the vertical axis of the valve; a paint supply mechanism is used to transport paint into the nozzle.

[0005] As a further solution of the present invention, the first driving member includes a support column, which is coaxially arranged with the nozzle and used to support the nozzle, and the nozzle is relatively fixed with the support column when moving along the horizontal axis of the valve; a motor, which is used to drive the support column to perform rotational motion; a screw mechanism, which is used to drive the support column to perform linear motion; a first clamping disk, which is installed on the frame and coaxially arranged with the support column; a first clamping block, which is provided with a plurality of first clamping blocks distributed in a circular array about the first clamping disk, and the first clamping blocks are all slidably connected to the first clamping disk and are connected to a tensioning spring.

[0006] As a further solution of the present invention, the second driving member includes a fixed rod, on which the nozzle can rotate around its axis; a first connecting rod, one end of which is hinged to the fixed rod, and the other end of which is movably connected to the inner side of the support column; a cylinder, which is installed in the support column and is used to drive the first connecting rod to move horizontally away from one end of the nozzle; a second clamping disk, which is arranged vertically with the first clamping disk; a second clamping block, which is provided with a plurality of second clamping blocks distributed in a circular array with respect to the second clamping disk, and the second clamping blocks are all slidably connected to the second clamping disk and connected to a tensioning spring; a telescopic connecting rod, one end of which is hinged to the first clamping disk, and the other end of which is hinged to the second clamping disk; a threaded sleeve, which is fixed to the second clamping disk; a screw, which is elastically slidably connected to the second clamping disk and threadably matched with the threaded sleeve, and a socket is provided at the bottom to be plugged into the plug block installed on the top of the nozzle.

[0007] As a further solution of the present invention, the ends of the first clamping block and the second clamping block are both provided with guiding inclined surfaces.

[0008] As a further solution of the present invention, the paint supply mechanism includes a material box with a pressurizing device installed therein, and the material box is arranged on the side of the support column; a turntable is rotatably mounted on the material box, and the turntable is fixedly connected to the support column and coaxially arranged with the support column, and a material delivery pipe is fixedly connected to the turntable, and both ends of the material delivery pipe are respectively connected to the material box and the nozzle.

[0009] As a further solution of the present invention, the nozzle includes a base, which is fixedly connected to the fixed rod, and the end of the feed pipe is fixedly connected to the base; a tube body, which is coaxially arranged with the base and can rotate around a common axis on the base; and a sealing ring, which is installed between the base and the tube body.

[0010] As a further solution of the present invention, the two fixed rods are fixedly connected with a first clamping block, and the two first clamping blocks are clamped; a limiting block is slidably installed on the support column, and the limiting block can limit the first clamping block; a wedge-shaped push block that can drive the limiting block to move is slidably connected to the base, and a traction rope is fixedly connected to the wedge-shaped push block, and a sliding rod is fixedly connected to the end of the traction rope away from the wedge-shaped push block, and the sliding rod is slidably connected to the base; the sliding rod can be driven by the tube body on the other side to move horizontally.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention arranges the nozzle, the first driving member and the second driving member. The first driving member can drive the nozzle to perform linear and rotational motions along the horizontal axis of the valve body, and the second driving member can drive the nozzle to perform linear and rotational motions along the vertical axis of the valve body. The arrangement of the first clamping plate and the second clamping plate can ensure that the trajectory of the nozzle driven by the first driving member and the second driving member can completely coincide with the two axes of the valve body, thereby ensuring that the paint on the inner wall of the valve body is sprayed more evenly. In addition, when the valve body is sprayed with paint, the installation and disassembly of the valve body is relatively convenient, which can greatly improve the processing efficiency of the valve body.

[0013] 2. The present invention provides two nozzles, which can be moved from both ends of the valve body to the middle position along the horizontal axis. The two nozzles can be combined into a cylindrical shape. When spraying the vertical circumferential side wall of the valve body, the paint spraying efficiency is higher. The paint spraying treatment on the inner wall of the valve body is formed in one step, which can greatly improve the processing efficiency of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic cross-sectional view of the structure of the first driving member of the present invention;

[0016] Figure 3 It is a schematic cross-sectional view of the structure of the second driving member of the present invention;

[0017] Figure 4 It is a schematic diagram of the positional relationship and connection relationship between the first clamping disk and the second clamping disk of the present invention;

[0018] Figure 5 It is a cross-sectional schematic diagram of the nozzle structure of the present invention;

[0019] Figure 6 This is a schematic diagram of the first card block and its related structures of the present invention;

[0020] Figure 7 It is a schematic diagram of the working state of the nozzle of the present invention;

[0021] Figure 8 It is a schematic diagram of the nozzle assembly state of the present invention;

[0022] Fig. 9 for Figure 7 A partial enlarged view of point A in the middle.

[0023] The reference numerals in the accompanying drawings are annotated as follows:

[0024] 1-workbench 1, 2-frame, 3-spray pipe, 4-support column, 5-motor, 6-screw mechanism, 7-first clamping plate, 8-first clamping block, 9-fixed rod, 10-first connecting rod, 11-cylinder, 12-second clamping plate, 13-second clamping block, 14-telescopic connecting rod, 15-threaded sleeve, 16-screw, 17-insert block, 18-jack, 19-material box, 20-turntable, 21-feeding pipe, 22-base, 23-tube body, 24-sealing ring, 25-first clamping block, 26-limiting block, 27-wedge-shaped push block, 28-traction rope, 29-slide rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 8 The present invention provides a technical solution: a spraying device for anti-corrosion treatment of valve surface, comprising a workbench 1, a frame 2, a nozzle 3, a first driving member, a second driving member and a paint supply mechanism; the frame 2 is movably installed on the top of the workbench 1 and is arranged to be two symmetrically arranged; the nozzle 3 is arranged to be a hollow semi-cylindrical shape, and a paint nozzle is opened on the top; the nozzle 3 is arranged to be two and respectively located on the inner sides of the two frames 2; the first driving member is used to drive the nozzle 3 to perform linear motion and rotational motion along the horizontal axis of the valve, and the two nozzles 3 can be combined into a complete cylindrical shape after moving to the bottom of the vertical section of the valve; the second driving member is used to drive the two combined nozzles 3 to perform linear motion and rotational motion along the vertical axis of the valve; the paint supply mechanism is used to transport paint into the nozzle 3.

[0027] When spraying paint on the valve body, the staff first moves the two frames 2 outwards, and then places the valve body between the two frames 2, and then the staff moves the frames 2 back to the initial position; then the first driving member starts to work, and the first driving member drives the two nozzles 3 to move from the left and right ends of the valve body to the middle position of the valve body respectively, and the nozzles 3 can move horizontally along the horizontal axis of the valve body and rotate around the horizontal axis of the valve body at the same time, and the paint in the nozzles 3 will be sprayed from the nozzles to the horizontal circumferential inner wall of the valve body; when the two nozzles 3 move to the middle position of the valve body, they will flip to the vertical position, and the two nozzles 3 can be combined as shown in the following figure. Figure 7The cylindrical shape shown; then the second driving member can drive the combined nozzle 3 to perform linear motion and rotational motion along the vertical axis of the valve body. During this process, the combined nozzle 3 can spray paint onto the vertical circumferential inner wall of the valve body; after the inner wall of the valve body is painted, the second driving member and the first driving member can drive the nozzle 3 to move back to the initial position, and then the staff can remove the processed valve body from the workbench 1.

[0028] Specifically, Figure 2 As shown, the first driving member includes a support column 4, a motor 5, a screw mechanism 6, a first clamping plate 7 and a first clamping block 8; the support column 4 is coaxially arranged with the nozzle 3 and is used to support the nozzle 3, and the nozzle 3 is relatively fixed with the support column 4 when moving along the horizontal axis of the valve; the motor 5 is used to drive the support column 4 to make a rotational motion; the screw mechanism 6 is used to drive the support column 4 to make a linear motion; the first clamping plate 7 is installed on the frame 2 and is coaxially arranged with the support column 4; the first clamping block 8 is provided with a plurality of first clamping plates 7 distributed in a circular array, and the first clamping blocks 8 are all slidably connected with the first clamping plate 7 and are connected with a tensioning spring; a guide slope is provided at the end of the first clamping block 8.

[0029] After the valve body is placed between the two frames 2, the staff can move the frame 2 toward the side close to the valve body so that the two first clamping plates 7 are respectively fitted with the left and right ends of the valve body; Figure 2 As shown, a guide slope is provided at the end of the first clamping block 8. When the staff pushes the frame body 2 toward the side close to the valve body, the end of the valve body can be clamped between multiple first clamping blocks 8 along the guide slope. Multiple first clamping blocks 8 can keep the valve body and the first clamping plate 7 in a coaxial state; then the external motor can drive the screw mechanism to start working, and the screw mechanism can drive the support column 4 and the nozzle 3 to move along the horizontal axis of the valve body; the motor 5 can drive the support column 4 and the nozzle 3 to rotate around the horizontal axis of the valve body, and the nozzle 3 can spray the paint evenly onto the horizontal circumferential inner wall of the valve body.

[0030] Specifically, Figure 3 , Figure 4 , Figure 7-Figure 9As shown, the second driving member includes a fixed rod 9, a first connecting rod 10, a cylinder 11, a second clamping plate 12, a second clamping block 13, a telescopic connecting rod 14, a threaded sleeve 15 and a screw 16; the nozzle 3 of the fixed rod 9 can rotate around its axis on the fixed rod 9; one end of the first connecting rod 10 is hinged to the fixed rod 9, and the other end is movably connected to the inner side of the support column 4; the cylinder 11 is installed in the support column 4 and is used to drive the first connecting rod 10 to move horizontally away from one end of the nozzle 3; the second clamping plate 12 is arranged vertically with the first clamping plate 7; the second clamping block 16 is arranged vertically with the first clamping plate 7; the second clamping block 16 is arranged vertically with the second clamping plate 12 ... plate 16 is arranged vertically with the second clamping plate 16; the second clamping block 16 is arranged vertically with the second clamping plate 16; the second clamping plate 16 is arranged vertically with the second clamping plate 16; the second clamping block 16 is arranged vertically with the second clamping plate 16; the second clamping plate 16 is arranged vertically with the second clamping plate 16; the second clamping block 16 is arranged vertically with the second clamping plate 16; the second clamping plate 16 is arranged vertically with the second clamping plate 16; the second clamping block 16 is arranged vertically with 3 are provided with a plurality of second clamping discs 12 distributed in a circumferential array, the second clamping blocks 13 are all slidably connected to the second clamping disc 12 and are connected to a tensioning spring, and a guiding inclined surface is provided at the end of the second clamping block 13; one end of the telescopic connecting rod 14 is hinged to the first clamping disc 7, and the other end is hinged to the second clamping disc 12; the threaded sleeve 15 is fixed to the second clamping disc 12; the screw 16 is elastically slidably connected to the second clamping disc 12 and is threadedly matched with the threaded sleeve 15, and a socket 18 capable of being plugged into the plug block 17 installed on the top of the nozzle 3 is provided at the bottom.

[0031] When the staff installs the valve body, after the first clamping plate 7 fits with the left and right ends of the valve body, the staff adjusts the top of the valve body to fit with the second clamping plate 12; multiple second clamping blocks 13 can cooperate to position the top of the valve body, and under the action of the telescopic connecting rod 14, the axes of the first clamping plate 7 and the second clamping plate 12 always remain in a vertical state. After the first clamping plate 7 and the second clamping plate 12 are both fitted with the valve body, the axis of the first clamping plate 7 coincides with the horizontal axis of the valve body, and the axis of the second clamping plate 12 coincides with the vertical axis of the valve body; when the first driving member drives the nozzle 3 to move to Figure 7 When the nozzle 3 is in the position shown in the figure, the nozzle 3 completes the spraying of the horizontal circumferential inner wall of the valve body, the motor 5 stops working, and then the screw mechanism 6 continues to drive the nozzle 3 to continue to move in the horizontal direction, and the two nozzles 3 will rotate upward against each other until the two nozzles 3 rotate to Figure 8 In the state shown, the two nozzles 3 are combined into a complete cylinder, and the plug block at the top of the nozzle 3 is inserted into the socket 18; then the cylinder 11 can drive one end of the first connecting rod 10 to move horizontally, and the other end of the first connecting rod 10 can drive the combined nozzle 3 to move upward. Under the cooperation of the plug block 17 and the socket 18, the nozzle 3 can move vertically upward against the screw rod 16. The screw rod 16 and the vertical section of the valve body are in a coaxial state, so the nozzle 3 can move upward along the vertical axis of the valve body. During the upward movement of the screw rod 16, the threaded sleeve 15 will drive the screw rod 16 and the nozzle 3 to rotate around the vertical axis of the valve body; after the vertical section of the valve body is painted, the cylinder 11 can drive the end of the first connecting rod 10 to move outward back to the initial position, and then the other end of the first connecting rod 10 can drive the nozzle 3 to move downward to a horizontal state; then the first driving member can drive the nozzle 3 to move outward back to the initial position.

[0032] Specifically, Figure 3 As shown, the paint supply mechanism includes a material box 19 with a pressurizing device installed therein, and the material box 19 is arranged on the side of the support column 4; a turntable 20 is rotatably installed on the material box 19, and the turntable 20 is fixedly connected to the support column 4 and coaxially arranged with the support column 4, and a material delivery pipe 21 is fixedly connected to the turntable 20, and both ends of the material delivery pipe 21 are respectively connected to the material box 19 and the nozzle 3.

[0033] The pressurizing device can press the paint in the material box 19 into the spray pipe 3 through the material delivery pipe 21. Figure 3 As shown, the feed pipe 21 can rotate synchronously with the nozzle 3 and the support column 4, the feed pipe 21 will not bend, and the paint can be smoothly transported to the nozzle 3, which can ensure that the paint is more evenly sprayed on the inner wall of the valve body.

[0034] Specifically, Figure 5 As shown, the nozzle 3 includes a base 22, a tube body 23 and a sealing ring 24; the base 22 is fixedly connected to the fixing rod 9, and the end of the feed pipe 21 is fixedly connected to the base 22; the tube body 23 is coaxially arranged with the base 22 and can rotate around a common axis on the base 22; the sealing ring 24 is installed between the base 22 and the tube body 23.

[0035] The nozzle 3 is configured to be composed of a base 22, a tube body 23 and a sealing ring, which can facilitate the disassembly, assembly and maintenance of the nozzle 3; the cross-sections of the tube body 23 and the base 22 are both semicircular, and the axes coincide; when the nozzle 3 moves horizontally in the valve body, the support column 4 will support and limit the tube body 23, and the tube body 23 cannot rotate when it moves horizontally in the valve body; when the nozzle 3 moves to the position as shown in the figure, the nozzle 3 moves horizontally in the valve body, and the nozzle 3 moves horizontally in the valve body. Figure 8 After being moved to the position shown in the figure, the limiting effect of the support column 4 on the tube body 23 disappears. At this time, the tube body 23 will rotate relative to the base 22 during the upward movement. The base 22 only needs to move vertically upward. One end of the feed pipe 21 is fixed to the base 22, and the base 22 does not need to rotate. This can ensure that the feed pipe 21 will not be entangled together, and can better ensure that the feed pipe 21 will not be bent. The paint can be smoothly transported to the nozzle 3, and the paint is more evenly sprayed on the inner wall of the valve body.

[0036] Specifically, Figure 6-Figure 9 As shown, the two fixing rods 9 are fixedly connected with a first clamping block 25, and the two first clamping blocks 25 are clamped; a limiting block 26 is slidably installed on the support column 4, and the limiting block 26 can limit the first clamping block 25; a wedge-shaped push block 27 that can drive the limiting block 26 to move is slidably connected to the base 22, and a traction rope 28 is fixedly connected to the wedge-shaped push block 27, and a sliding rod 29 is fixedly connected to the end of the traction rope 28 away from the wedge-shaped push block 27, and the sliding rod 29 is slidably connected to the base 22; the sliding rod 29 can be driven by the tube body 23 on the other side to move horizontally.

[0037] When the nozzle 3 moves along the horizontal axis in the valve body, Figure 6 As shown, the limit block 26 cooperates with the support column 4 to fix the fixing rod 9 and the nozzle 3. When the two nozzles 3 move close to each other in the horizontal direction, the sliding rod 29 will contact the tube body 23 on the other side. When the tube body 23 continues to move, the tube body 23 will drive the sliding rod 29 to move. The sliding rod 29 will drive the wedge-shaped push block 27 to move downward through the traction rope 28. The wedge-shaped push block 27 will drive the limit block 26 to move outward through the inclined surface to cancel the limit on the first block 25. At this time, the fixing rod 29 and the nozzle 3 can be rotated upward to the vertical position; Fig. 9 As shown, after the nozzle 3 is rotated to the vertical position, the two first clamping blocks 25 will be engaged, and the two nozzles 3 can work stably after being combined.

[0038] 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.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spraying device for anti-corrosion treatment of valve surface, comprising a workbench (1), characterized in that: Also includes: A frame (2) is movably mounted on the top of the workbench (1) and is arranged in two symmetrical positions; The nozzle (3) is arranged in a hollow semi-cylindrical shape, and a paint spraying port is provided on the top; the nozzle (3) is arranged in two pieces and is respectively located inside the two frames (2); A first driving member is used to drive the nozzle (3) to perform linear motion and rotational motion along the horizontal axis of the valve, and the two nozzles (3) can be combined into a complete cylindrical shape after moving to below the vertical section of the valve; A second driving member is used to drive the two combined nozzles (3) to perform linear motion and rotational motion along the vertical axis of the valve; The paint supply mechanism is used for conveying paint into the spray pipe (3).

2. The valve surface anti-corrosion spraying equipment according to claim 1, characterized in that: The first driving member comprises: A support column (4) is coaxially arranged with the nozzle (3) and is used to support the nozzle (3), wherein the nozzle (3) is relatively fixed to the support column (4) when moving along the horizontal axis of the valve; A motor (5) for driving the support column (4) to perform rotational motion; A screw mechanism (6) is used to drive the support column (4) to perform linear motion; A first clamping plate (7) is mounted on the frame (2) and is coaxially arranged with the support column (4); A plurality of first clamping blocks (8) are arranged in a circular array with respect to the first clamping disk (7). The first clamping blocks (8) are all slidably connected to the first clamping disk (7) and are connected to a tensioning spring.

3. The valve surface anti-corrosion spraying equipment according to claim 2 is characterized in that: The second driving member comprises: A fixed rod (9), on which the nozzle (3) can rotate around its axis; A first connecting rod (10), one end of which is hinged to the fixing rod (9), and the other end of which is movably connected to the inner side of the supporting column (4); A cylinder (11) is installed in the support column (4) and is used to drive the first connecting rod (10) to move horizontally away from one end of the nozzle (3); A second clamping plate (12) is arranged vertically with respect to the first clamping plate (7); A plurality of second clamping blocks (13) are provided and distributed in a circumferential array about the second clamping disk (12), and the second clamping blocks (13) are all slidably connected to the second clamping disk (12) and are connected to a tensioning spring; A telescopic connecting rod (14), one end of which is hinged to the first clamping plate (7), and the other end of which is hinged to the second clamping plate (12); A threaded sleeve (15) fixedly connected to the second clamping plate (12); The screw rod (16) is elastically slidably connected to the second clamping plate (12) and threadedly matched with the threaded sleeve (15). The bottom is provided with a plug hole (18) that can be plugged into the plug block (17) installed on the top of the nozzle (3).

4. The valve surface anti-corrosion spraying equipment according to claim 3 is characterized in that: The ends of the first clamping block (8) and the second clamping block (13) are both provided with guiding inclined surfaces.

5. The valve surface anti-corrosion spraying equipment according to claim 3 is characterized by: The paint supply mechanism comprises a material box (19) with a pressurizing device therein, the material box (19) being arranged on the side of a support column (4); a turntable (20) being rotatably mounted on the material box (19), the turntable (20) being fixedly connected to the support column (4) and coaxially arranged with the support column (4), a material delivery pipe (21) being fixedly connected to the turntable (20), the two ends of the material delivery pipe (21) being respectively connected to the material box (19) and the nozzle (3).

6. The valve surface anti-corrosion spraying equipment according to claim 5, characterized in that: The nozzle (3) comprises: A base (22) is fixedly connected to the fixing rod (9), and an end of the feed pipe (21) is fixedly connected to the base (22); A tubular body (23) is coaxially arranged with the base (22) and is rotatable on the base (22) around a common axis; The sealing ring (24) is installed between the base (22) and the tube body (23).

7. The valve surface anti-corrosion spraying equipment according to claim 6, characterized in that: The two fixing rods (9) are both fixedly connected with a first clamping block (25), and the two first clamping blocks (25) are clamped; a limiting block (26) is slidably installed on the support column (4), and the limiting block (26) can limit the first clamping block (25); a wedge-shaped push block (27) capable of driving the limiting block (26) to move is slidably connected to the base (22), a traction rope (28) is fixedly connected to the wedge-shaped push block (27), and a sliding rod (29) is fixedly connected to one end of the traction rope (28) away from the wedge-shaped push block (27), and the sliding rod (29) is slidably connected to the base (22); the sliding rod (29) can be driven by the tube body (23) on the other side to move horizontally.

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