Prefabricated stair maintenance spraying device

Abstract

The invention provides a prefabricated stair maintenance spraying device, and relates to the technical field of stair maintenance, the prefabricated stair maintenance spraying device comprises a main moving seat, the top of the left side of the main moving seat is integrally provided with a moving frame body, and the bottom of the moving frame body is slidably provided with a movable support matched with a guide rail; two groups of universal wheels are fixedly arranged at the bottoms of the main moving seat and the movable bracket; a guide pipe is fixedly arranged on the left side of the main moving seat; two groups of vertical guide rods are fixedly arranged at the top of the left side of the main moving seat; spraying heads are arranged, the uniform spraying and cleaning function is provided, a triangular guide plate automatically moves up and down along with the shape of a stairway, it is guaranteed that the spraying positions of the spraying heads are parallel to the stairway, the stairway is flushed while water is sprayed out, garbage is flushed away, the guiding effect of the triangular guide plate cannot be affected no matter whether the triangular guide plate moves forwards or backwards, and compared with a vertical spraying method, the spraying efficiency is improved. And garbage is not easy to remain, and the maintenance effect is good. The problem that an existing spraying device lacks a uniform spraying and cleaning function is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of stair maintenance, in particular to a prefabricated stair maintenance spraying device. Background Art

[0002] Prefabricated stairs are a convenient type of staircase. The stairs are directly cast by concrete, and then fixed directly in the corridor for use. When the stairs are stored, weathering and exposure to the sun for too long will reduce the quality of the stairs, so they need to be sprayed with protective liquid regularly for protection.

[0003] The spraying devices currently used have the following disadvantages: 1. The current spraying device mainly adopts the method of directly spraying the stairs for flushing spraying, which is inconvenient to remove the garbage on the surface of the stairs. Moreover, due to the inconsistent depth of the stairs, it will cause uneven spraying and lack of uniform spraying and cleaning function. 2. Lack of adaptive effect, inconvenient to automatically adjust according to the width of the stairs; 3. Lack of synchronous and fast mobile spray drive structure. Summary of the Invention

[0004] In view of this, the present invention provides a prefabricated stair maintenance spray device, which has a closing piston and provides an adaptability function. It can automatically adjust according to the width of the stairs. Water enters the closing piston through the connecting pipe, expands the closing piston, and then the guide rollers on both sides are close to the stairs. When the device is moved, the electric cylinder is directly started to insert the plug valve into the gate valve, and then the movable bracket is stretched to the left, compressing the closing piston, squeezing the water in the closing piston and discharging it through the one-way valve D, which can ensure that the distance between the main movable seat and the movable bracket will not increase during the movement, and is convenient for movement.

[0005] The present invention provides a prefabricated stair maintenance spraying device, which specifically includes: a main movable seat, a movable frame is integrally provided on the left top of the main movable seat, and a movable bracket is slidably provided on the bottom of the movable frame in cooperation with the guide rail; two sets of universal wheels are fixedly provided on the bottom of the main movable seat and the movable bracket, and a guide tube is fixedly provided on the left side of the main movable seat; two sets of vertical guide rods are fixedly provided on the left top of the main movable seat; a triangular guide plate, the triangular guide plate is slidably provided on the outside of the vertical guide rod; a closed water tank, the closed water tank is fixedly provided on the top of the main movable seat in cooperation with the bracket; a fixed cylinder, the fixed cylinder is fixedly provided in the middle of the bottom of the closed water tank; a transmission motor, the transmission motor is fixedly embedded in the middle of the bottom of the closed water tank; a pressure valve, the pressure valve is connected and provided at the bottom of the guide tube; and a gate valve is fixedly provided on the top of the main movable seat.

[0006] Optionally, the main movable seat also includes: a closing piston, the left side of the movable bracket turns downward, and a closing piston is fixedly arranged on the inner side of the turning point, and the telescopic end of the closing piston is fixedly connected to the movable bracket; a guide roller, four groups of guide rollers are rotatably arranged on the adjacent sides of the main movable seat and the movable bracket; a driven shaft, two groups of driven shafts are rotatably arranged on the top of the main movable seat, and the driven shaft and the two middle groups of guide rollers on the top of the main movable seat are connected by bevel gear transmission; a linkage shaft, a linkage shaft is rotatably arranged on the top of the main movable seat, and the linkage shaft and the driven shafts on both sides are connected by bevel gear transmission.

[0007] Optionally, the triangular guide plate includes: a nozzle, a nozzle is fixedly provided on the top of the bottom of the triangular guide plate, and a pipe is provided to connect the nozzle to the bottom of the pressure valve; the triangular guide plate automatically moves up and down following the shape of the stairs to ensure that the spraying position of the nozzle is parallel to the stairs, and the sprayed water will flush the stairs at the same time to wash away the garbage; an arc-shaped baffle structure is provided above the nozzle of the nozzle to ensure that the spray from the nozzle will not splash upward.

[0008] Optionally, the closed water tank includes: a threaded plug, a threaded plug is provided on the top of the closed water tank; a pipe groove, a pipe groove is opened in the middle of the left side of the closed water tank; a one-way valve A, a one-way valve A is fixedly provided on the right side of the bottom of the closed water tank; a connecting pipe, a connecting pipe is provided at the bottom left side of the closed water tank to communicate with the guide pipe and the approaching piston, and the pressure valve is connected above the connecting pipe.

[0009] Optionally, the fixed cylinder includes: an air pump, eight groups of air pumps are fixedly arranged inside the fixed cylinder; a one-way valve B, the outside of the air pump is connected through the fixed cylinder and is provided with a one-way valve B; an annular tube body, the outside of the eight groups of one-way valves B is connected with an annular tube body, and the annular tube body is connected to the bottom of the one-way valve A through a pipeline; a one-way valve C, the bottom of the telescopic end of the air pump is connected with the one-way valve C; a guide shaft, the top of the telescopic end of the air pump is connected with a guide shaft; a transmission shaft, the shaft end of the transmission motor is connected to the transmission shaft with a bevel gear transmission, and the transmission shaft is connected to the linkage shaft with a bevel gear transmission.

[0010] Optionally, the transmission motor also includes: a transmission disk, a transmission disk is fixedly provided on the shaft end of the transmission motor; an eccentric guide groove, an eccentric guide groove is opened at the bottom of the transmission disk, and the guide shaft slides in the eccentric guide groove; during the rotation of the transmission motor, the transmission shaft is synchronously driven to rotate by the bevel gear, the transmission shaft cooperates with the bevel gear to drive the linkage shaft to rotate, the linkage shaft cooperates with the bevel gear to drive the driven shaft to rotate, and the driven shaft cooperates with the bevel gear to drive the guide roller to rotate, and then the guide roller propulsion device moves as a whole; when the transmission disk rotates, the eccentric guide groove drives the guide shaft to move, and then the guide shaft drives the air pump to repeatedly extend and retract, when the air pump extends, the outside air passes through the one-way valve C into the air pump, and when the air pump contracts, the air passes through the one-way valve B and is input into the annular tube body, and then passes through the one-way valve A into the closed water tank to pressurize the closed water tank.

[0011] Optionally, the pressure valve includes: side clamps, two groups of side clamps are fixedly provided on both sides of the pressure valve; a wedge block, a spring rod is fixedly provided on the outside of the wedge block, the spring rod is sleeved with a spring and passes through the side clamps.

[0012] Optionally, the gate valve includes: a plug valve, which is slidingly provided in the middle of the right side of the gate valve; a one-way valve D, which is fixedly provided in the middle of the plug valve; and an electric cylinder, which is fixedly provided at the right end of the plug valve and is fixed on the top of the closed water tank.

[0013] The beneficial effects are as follows: 1. The nozzle is set to provide a uniform spray cleaning function. The triangular guide plate automatically moves up and down following the shape of the stairs to ensure that the spray position from the nozzle is parallel to the stairs. The sprayed water will also flush the stairs and wash away the garbage. Regardless of whether the triangular guide plate moves forward or backward, its guiding effect will not be affected. Compared with the vertical spraying method, it is not easy to retain garbage and the maintenance effect is good.

[0014] 2. The approach piston is set to provide an adaptive function, which can be automatically adjusted according to the width of the stairs. Water enters the approach piston through the connecting pipe, expands the approach piston, and then the guide rollers on both sides are close to the stairs. When moving the device, directly start the electric cylinder to insert the plug valve into the gate valve, and then stretch the movable bracket to the left, compressing the approach piston, squeezing the water in the approach piston and discharging it through the one-way valve D, which can ensure that the distance between the main moving seat and the movable bracket will not increase during the movement, making it convenient to move.

[0015] 3. The transmission shaft and transmission disc are both connected to the transmission motor, providing a synchronous and fast mobile spray drive structure. When the transmission disc rotates, the eccentric guide groove drives the guide shaft to move, and then the guide shaft drives the air pump to repeatedly extend and retract to provide a variable volume conveying effect, which increases the pressure of the closed water tank. The transmission shaft cooperates with the bevel gear to drive the linkage shaft, driven shaft, and guide roller to rotate, and then the guide roller propels the device to move as a whole to achieve synchronous mobile spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It shows a schematic diagram of a usage state structure according to an embodiment of the present invention; Figure 2 It shows a schematic diagram of a three-dimensional structure according to an embodiment of the present invention; Figure 3 It shows an axonometric structural diagram according to an embodiment of the present invention; Figure 4 A schematic diagram of a side tilt structure according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the bottom structure of a closed water tank according to an embodiment of the present invention is shown; Figure 6A schematic diagram of the three-dimensional structure of a fixed cylinder according to an embodiment of the present invention is shown; Figure 7 A schematic cross-sectional view of a pressure valve according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of a partially enlarged structure of A according to an embodiment of the present invention is shown.

[0017] Reference Signs List 1. Main moving seat; 101. Moving frame; 102. Movable bracket; 103. Approaching piston; 104. Guide roller; 105. Guide tube; 106. Vertical guide rod; 107. Driven shaft; 108. Linkage shaft; 2. Triangular guide plate; 201. Sprinkler; 3. Closed water tank; 301. Threaded plug; 302. Pipe groove; 303. One-way valve A; 304. Connecting pipe; 4. Fixed cylinder ; 401, air pump; 402, one-way valve B; 403, annular tube body; 404, one-way valve C; 405, guide shaft; 406, drive shaft; 5, drive motor; 501, drive plate; 502, eccentric guide groove; 6, pressure valve; 601, side clamp; 602, wedge block; 603, spring rod; 7, gate valve; 701, plug valve; 702, one-way valve D; 703, electric cylinder. DETAILED DESCRIPTION

[0018] In order to make the purpose, solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0019] Example 1: Please refer to Figures 1 to 8 As shown: The present invention proposes a prefabricated stair maintenance spraying device, comprising: a main movable seat 1, a movable frame 101 is integrally provided on the left top of the main movable seat 1, and a movable bracket 102 is slidably provided at the bottom of the movable frame 101 in cooperation with the guide rail; two sets of universal wheels are fixedly provided at the bottom of the main movable seat 1 and the movable bracket 102, and a guide tube 105 is fixedly provided on the left side of the main movable seat 1; two sets of vertical guide rods 106 are fixedly provided on the left top of the main movable seat 1; a triangular guide plate 2, the triangular guide plate 2 is slidably provided on the outside of the vertical guide rod 106; a closed water tank 3, the closed water tank 3 is fixedly provided on the top of the main movable seat 1 in cooperation with the bracket; a fixed cylinder 4, the fixed cylinder 4 is fixedly provided in the middle of the bottom of the closed water tank 3; a transmission motor 5, the transmission motor 5 is fixedly embedded in the middle of the bottom of the closed water tank 3; a pressure valve 6, the pressure valve 6 is connected and provided at the bottom of the guide tube 105; and a gate valve 7, the gate valve 7 is fixedly provided on the top of the main movable seat 1.

[0020] Among them, the main movable seat 1 also includes: a closing piston 103, the left side of the movable bracket 102 turns downward, and the closing piston 103 is fixedly arranged on the inner side of the turning point, and the telescopic end of the closing piston 103 is fixedly connected to the movable bracket 102; a guide roller 104, four groups of guide rollers 104 are rotatably arranged on the adjacent sides of the main movable seat 1 and the movable bracket 102; a driven shaft 107, two groups of driven shafts 107 are rotatably arranged on the top of the main movable seat 1, and the driven shaft 107 and the two middle groups of guide rollers 104 on the top of the main movable seat 1 are arranged to bevel gear transmission connection; a linkage shaft 108, a linkage shaft 108 is rotatably arranged on the top of the main movable seat 1, and the linkage shaft 108 is arranged to bevel gear transmission connection with the driven shafts 107 on both sides.

[0021] Among them, the triangular guide plate 2 includes: a nozzle 201, a nozzle 201 is fixedly arranged at the top of the bottom of the triangular guide plate 2, and the nozzle 201 is connected to the bottom of the pressure valve 6 by a pipe; an arc-shaped baffle structure is arranged above the nozzle of the nozzle 201, which can ensure that the spray of the nozzle 201 will not splash upward, thereby ensuring normal spraying.

[0022] Among them, the closed water tank 3 includes: a threaded plug 301, a threaded plug 301 is provided on the top of the closed water tank 3; a pipe groove 302, a pipe groove 302 is opened in the middle of the left side of the closed water tank 3; a one-way valve A303, a one-way valve A303 is fixedly provided on the right side of the bottom of the closed water tank 3; a connecting pipe 304, a connecting pipe 304 is provided at the bottom of the left side of the closed water tank 3 to communicate with the guide pipe 105 and the approaching piston 103, and the pressure valve 6 is connected above the connecting pipe 304.

[0023] Among them, the fixed cylinder 4 includes: an air pump 401, eight groups of air pumps 401 are fixedly arranged inside the fixed cylinder 4; a one-way valve B402, the outside of the air pump 401 is connected to the fixed cylinder 4 and is provided with a one-way valve B402; an annular tube body 403, the outside of the eight groups of one-way valves B402 is connected with an annular tube body 403, and the annular tube body 403 is connected to the bottom of the one-way valve A303 by a pipeline; a one-way valve C404, the bottom of the telescopic end of the air pump 401 is connected with the one-way valve C404; a guide shaft 405, the top of the telescopic end of the air pump 401 is connected with the guide shaft 405; a transmission shaft 406, the shaft end of the transmission motor 5 is connected to the transmission shaft 406 by a bevel gear transmission, and the transmission shaft 406 is connected to the linkage shaft 108 by a bevel gear transmission.

[0024] The transmission motor 5 further includes: a transmission disc 501 , which is fixedly provided on the shaft end of the transmission motor 5 ; and an eccentric guide groove 502 , which is provided at the bottom of the transmission disc 501 and in which the guide shaft 405 slides.

[0025] Among them, the pressure valve 6 includes: side clamps 601, two groups of side clamps 601 are fixedly set on both sides of the pressure valve 6; wedge blocks 602, the outside of the wedge blocks 602 is fixedly set with spring rods 603, the spring rods 603 are sleeved with springs and pass through the side clamps 601.

[0026] like Figure 1-5 As shown, during assembly, the threaded plug 301 is opened, the spray liquid is injected into the closed water tank 3, and then the threaded plug 301 is closed; the main movable seat 1 and the movable bracket 102 are moved to both sides of the stairs, and then the transmission motor 5 is started, and the transmission motor 5 drives the transmission disc 501 to rotate. When the transmission disc 501 rotates, the eccentric guide groove 502 drives the guide shaft 405 to move, and then the guide shaft 405 drives the air pump 401 to repeatedly extend and retract. When the air pump 401 extends, the outside air passes through the one-way valve C404 and enters the air pump 401. When the air pump 401 contracts, the air passes through the one-way valve B402 and is input into the annular tube body 403, and then passes through the one-way valve A303 to enter the closed water tank 3, pressurizing the closed water tank 3, and then the water passes through the connecting pipe 304 and enters the approaching piston 103, which opens the approaching piston 103, and then the guide rollers 104 on both sides are close to the stairs; After further pressurization, the water pushes open the two sets of wedge blocks 602 and enters the nozzle 201, and is sprayed out from the nozzle 201; At the same time, the triangular guide plate 2 automatically moves up and down following the shape of the stairs, ensuring that the spray position from the nozzle 201 is parallel to the stairs. The sprayed water will also flush the stairs and wash away the garbage. During the rotation of the transmission motor 5, the transmission shaft 406 is synchronously driven to rotate in conjunction with the bevel gear. The transmission shaft 406 is driven to rotate in conjunction with the bevel gear. The linkage shaft 108 is driven to rotate in conjunction with the bevel gear. The driven shaft 107 is driven to rotate in conjunction with the bevel gear. The guide roller 104 is driven to rotate by the bevel gear, and then the guide roller 104 propels the device as a whole to perform mobile spraying.

[0027] Example 2: Based on Example 1, Figure 1-5 As shown, there is no difference between the front and rear structures of the present application. If reverse movement is required, the reverse rotating transmission motor 5 can reverse without affecting the spraying step.

[0028] Example 3: Based on Example 1, Figure 8 As shown, the gate valve 7 can be blocked; Among them, the gate valve 7 includes: a plug valve 701, which is slidably arranged in the middle of the right side of the gate valve 7; a one-way valve D702, which is fixedly arranged in the middle of the plug valve 701; an electric cylinder 703, which is fixedly arranged at the right end of the plug valve 701, and the electric cylinder 703 is fixed on the top of the closed water tank 3.

[0029] If the device is moved when not spraying, the electric cylinder 703 is directly started to insert the plug valve 701 into the gate valve 7, and then the movable bracket 102 is stretched to the left, the piston 103 is compressed, and the water in the piston 103 is squeezed and discharged through the one-way valve D702. This can ensure that the distance between the main movable seat 1 and the movable bracket 102 will not increase during the movement, making it convenient to move.

[0030] Specific usage and function of this embodiment: In the present invention, spray liquid is injected into the closed water tank 3, and then the threaded plug 301 is closed; the main movable seat 1 and the movable bracket 102 are moved to both sides of the stairs, and then the transmission motor 5 is started, and the transmission motor 5 drives the transmission disk 501 to rotate. When the transmission disk 501 rotates, the eccentric guide groove 502 drives the guide shaft 405 to move, and then the guide shaft 405 drives the air pump 401 to repeatedly extend and retract. When the air pump 401 extends, the outside air passes through the one-way valve C404 and enters the air pump 401. When the air pump 401 contracts, the air passes through the one-way valve B402 and is input into the annular tube body 403, and then passes through the one-way valve A303 to enter the closed water tank 3, pressurizing the closed water tank 3, and then the water passes through the connecting pipe 304 and enters the approaching piston 103, pushing the approaching piston 103 open, and then the guide rollers 104 on both sides are close to the stairs; After further pressurization, water pushes open the two sets of wedge blocks 602 and enters the nozzle 201, and is sprayed out from the nozzle 201; at the same time, the triangular guide plate 2 automatically moves up and down following the shape of the stairs, ensuring that the spraying position from the nozzle 201 is parallel to the stairs. The sprayed water will also flush the stairs and wash away the garbage; During the rotation of the transmission motor 5, the transmission shaft 406 is synchronously driven to rotate in conjunction with the bevel gear. The transmission shaft 406 is driven to rotate in conjunction with the bevel gear. The linkage shaft 108 is driven to rotate in conjunction with the bevel gear. The driven shaft 107 is driven to rotate in conjunction with the bevel gear. The guide roller 104 is driven to rotate. Then, the guide roller 104 propels the device as a whole to move and perform mobile spraying. When reverse movement is required, the reverse rotation of the transmission motor 5 can reverse the movement without affecting the spraying step. When the device needs to be moved without spraying, the electric cylinder 703 is directly started to insert the plug valve 701 into the gate valve 7, and then the movable bracket 102 is stretched to the left, the piston 103 is compressed, and the water in the piston 103 is squeezed and discharged through the one-way valve D702. This can ensure that the distance between the main movable seat 1 and the movable bracket 102 will not increase during the movement, making it convenient to move.

Claims

1. A prefabricated stair maintenance spraying device, characterized in that: The invention comprises a main movable seat (1), wherein a movable frame (101) is integrally provided on the top of the left side of the main movable seat (1), and a movable bracket (102) is slidably provided on the bottom of the movable frame (101) in cooperation with a guide rail; two sets of universal wheels are fixedly provided on the bottom of the main movable seat (1) and the movable bracket (102), and a guide tube (105) is fixedly provided on the left side of the main movable seat (1); two sets of vertical guide rods (106) are fixedly provided on the top of the left side of the main movable seat (1); a triangular guide plate (2) is slidably provided on the vertical guide plate (106) and the triangular guide plate (2) is slidably provided on the vertical guide plate (106). The outer portion of the straight guide rod (106); a closed water tank (3), the closed water tank (3) is fixedly arranged on the top of the main movable seat (1) in conjunction with the bracket; a fixed cylinder (4), the fixed cylinder (4) is fixedly arranged in the middle of the bottom of the closed water tank (3); a transmission motor (5), the transmission motor (5) is fixedly embedded in the middle of the bottom of the closed water tank (3); a pressure valve (6), the pressure valve (6) is connected to the bottom of the guide tube (105); and a gate valve (7), the gate valve (7) is fixedly arranged on the top of the main movable seat (1).

2. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The main movable seat (1) further comprises: The piston (103) is brought closer, and the left side of the movable bracket (102) is turned downward. The piston (103) is fixedly provided on the inner side of the turning point, and the telescopic end of the piston (103) is fixedly connected to the movable bracket (102); Guide rollers (104), four sets of guide rollers (104) are rotatably provided on adjacent sides of the main movable seat (1) and the movable bracket (102); Driven shaft (107), two sets of driven shafts (107) are rotatably provided on the top of the main movable seat (1), and the driven shafts (107) are connected to the two sets of guide rollers (104) in the middle of the top of the main movable seat (1) by means of bevel gear transmission; A linkage shaft (108) is provided on the top of the main movable seat (1) for rotation, and the linkage shaft (108) is connected to the driven shafts (107) on both sides by bevel gear transmission.

3. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The triangular guide plate (2) comprises: A nozzle (201) is fixedly provided at the top of the bottom of the triangular guide plate (2), and the nozzle (201) is connected to the bottom of the pressure valve (6) via a pipeline; an arc-shaped baffle structure is provided above the nozzle of the nozzle (201).

4. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The closed water tank (3) includes: A threaded plug (301) is provided on the top of the closed water tank (3); A pipe groove (302) is provided in the middle of the left side of the closed water tank (3); One-way valve A (303), a one-way valve A (303) is fixedly provided on the right side of the bottom of the closed water tank (3); A connecting pipe (304) is provided at the bottom left of the closed water tank (3) and is communicated with the guide pipe (105) and the approaching piston (103), and a pressure valve (6) is connected above the connecting pipe (304).

5. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The fixed cylinder (4) comprises: Air pump (401), eight sets of air pumps (401) are fixedly arranged inside the fixed cylinder (4); One-way valve B (402), the outside of the air pump (401) is connected to the fixed cylinder (4) and is provided with a one-way valve B (402); The annular tube body (403) is provided on the outside of the eight sets of one-way valves B (402) and is connected to the bottom of the one-way valve A (303) through a pipeline. A one-way valve C (404), a one-way valve C (404) is connected to the bottom of the telescopic end of the air pump (401); A guide shaft (405) is connected to the top of the telescopic end of the air pump (401); The transmission shaft (406) is connected to the shaft end of the transmission motor (5) by a bevel gear transmission, and the transmission shaft (406) is connected to the linkage shaft (108) by a bevel gear transmission.

6. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The transmission motor (5) further comprises: A transmission disc (501), a transmission disc (501) is fixedly provided on the shaft end of the transmission motor (5); An eccentric guide groove (502) is provided at the bottom of the transmission disc (501), and the guide shaft (405) slides in the eccentric guide groove (502).

7. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The pressure valve (6) comprises: Side clamping plates (601), two sets of side clamping plates (601) are fixedly provided on both sides of the pressure valve (6); A wedge-shaped block (602) is fixedly provided with a spring rod (603) on the outside of the wedge-shaped block (602), and the spring rod (603) is sleeved with a spring and passes through the side clamping plate (601).

8. A prefabricated stair maintenance spraying device as claimed in claim 1, characterized in that: The gate valve (7) includes: A plug valve (701) is provided in a sliding manner in the middle of the right side of the gate valve (7); One-way valve D (702), a one-way valve D (702) is fixedly provided in the middle of the plug valve (701); The electric cylinder (703) is fixedly provided at the right end of the plug valve (701), and the electric cylinder (703) is fixed on the top of the closed water tank (3).

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