Mechanism suitable for urea pump fixing piece feeding and pump body overturning

Abstract

The invention relates to a urea pump fixing piece feeding and pump body turnover mechanism which comprises a feeding device, a pump body turnover device, a fixing piece locking device and a material manipulator, the pump body turnover device is arranged on one side of the output end of the feeding device, the fixing piece locking device is arranged on one side of the pump body turnover device, and the material manipulator is arranged on the other side of the pump body turnover device. The material manipulator is located above the pump body turnover device and horizontally moves through a guide rail, the feeding device comprises a first lead screw sliding rail, a material storage plate, a push block and supporting plates, the supporting plates are arranged on the left side and the right side of the first lead screw sliding rail correspondingly, sliding grooves are formed in the two supporting plates correspondingly, and the two ends of each supporting plate are the feeding end and the discharging end correspondingly; a material storage plate is horizontally arranged above the feeding end, a discharging through hole is formed in the middle of the material storage plate, and a fixing piece limiting plate and a fixing piece limiting column are arranged on the front side and the rear side of the discharging through hole correspondingly.

Description

Technical Field

[0001] The present invention relates to the technical field of urea pump automatic assembly equipment, and specifically, it is an applicable feeding mechanism for urea pump fixing pieces and a pump body flipping mechanism. Background Art

[0002] The urea pump is an indispensable part of heavy-duty diesel vehicles. There are three pipe joints in the common urea pump body, namely the cooling and heating liquid inlet valve, the cooling and heating liquid outlet valve, and the urea injection valve. The traditional method of fixing the pipe joints is to tighten them one by one through the thread fitting of the nuts on the valve caps and the pump body assembly. There is a method to fix the three pipe joints by tightening the fixing piece gasket on the pump body assembly. Currently, manual or semi-automatic methods are mostly used, which have problems such as high labor intensity, low production efficiency, and insufficient feeding accuracy. The method of manually grasping and installing the fixing piece also has low efficiency. Some existing equipment has less monitoring of the entire installation process of the fixing piece, limited automation level, poor flexible adaptability, and it is difficult to meet the requirements of high-efficiency production. Therefore, an intelligent, high-precision, and flexible automatic feeding and pump body flipping device is needed to improve the assembly quality and production efficiency of the pump body and reduce manual dependence and maintenance costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that manual or semi-automatic production has high labor intensity, low production efficiency, and insufficient feeding accuracy, and it is difficult to meet the requirements of high-efficiency production. In view of the above deficiencies, an applicable feeding mechanism for urea pump fixing pieces and a pump body flipping mechanism are provided.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An applicable feeding mechanism for urea pump fixing pieces and a pump body flipping mechanism, comprising a feeding device, a pump body flipping device, a fixing piece locking device, and a material manipulator.

[0006] One side of the output end of the feeding device is provided with the pump body flipping device, one side of the pump body flipping device is provided with the fixing piece locking device, the material manipulator is located above the pump body flipping device, and the material manipulator realizes horizontal movement through a guide rail.

[0007] The feeding device includes a first lead screw slide rail, a stock plate, a pushing block, and a support plate. Support plates parallel to the first lead screw slide rail are arranged on both the left and right sides of the first lead screw slide rail. Relative sides of the upper surfaces of the two support plates are each horizontally provided with a chute, and the two chutes are used to support the two ends of a fixing piece. The two ends of the support plate are respectively a feeding end and a discharging end. A stock plate is horizontally arranged above the feeding end. A blanking through hole is provided in the middle of the stock plate. A fixing piece limiting plate and a fixing piece limiting column are respectively arranged on the front and rear sides of the blanking through hole. The fixing piece limiting plate and the fixing piece limiting column are used to stack and place fixing pieces. The lowermost one of a stack of fixing pieces is located at the feeding end, and multiple fixing pieces are stacked and placed on the chute inside the through hole. The first lead screw slide rail is used to push the fixing piece at the feeding end forward along the chute to the discharging end through the pushing block;

[0008] The first pump body manipulator is used to pick up the pump body assembly from the previous station and place it on the pump body flipping device. The pump body flipping device is used to clamp and fix the pump body assembly; the pump body flipping device is also used to drive the pump body assembly to flip from a horizontal state to a vertical state after clamping and fixing the pump body assembly. After the sensor on the pump body flipping device detects that the pump body assembly has completed flipping, the material manipulator is used to simultaneously pick up a set of three pipe connectors on the pipe connector tray and install them at the corresponding positions on the pump body assembly. The material manipulator is also used to pick up the fixing piece at the discharging end and install it on the outside of the pipe connector of the pump body assembly after the pipe connector assembly is completed. The fixing piece locking device is used to lock the fixing piece and the pump body assembly through bolts to uniformly fix the three pipe connectors. After the fixing piece locking device locks the fixing piece, the pump body flipping device flips the pump body assembly from a vertical state to a horizontal state and releases the fixation of the pump body assembly. The second pump body manipulator picks up the assembled pump body assembly and places it on the next station. The first pump body manipulator picks up the next pump body assembly and places it on the pump body flipping device, repeating the process of picking up and installing the pipe connectors. After the sensor at the discharging end detects that the fixing piece has been picked up, the first lead screw guide drives the pushing block to reset and then pushes the next fixing piece to move to the discharging end, repeating the process of picking up and installing the fixing piece.

[0009] Further, the fixing piece limiting column is adapted to the shape of the fixing piece. A groove is provided at a position corresponding to the recess on the outside of the fixing piece, and the fixing piece can only be placed between the fixing piece limiting plate and the fixing piece limiting column when the fixing piece is placed correctly in the front-back direction. The cavity between the lower surface of the stock plate and the upper surface of the chute at the feeding end can only accommodate one fixing piece. The upper surface of the pushing block is an inclined surface with the front end higher than the rear end, so that when the pushing block moves forward, it can smoothly push a fixing piece at the feeding end forward, and when moving backward, it can move under the fixing piece at the feeding end to the initial position without being blocked by the fixing piece at the feeding end.

[0010] Further, the pump body flipping device includes a base, a mounting plate, a telescopic cylinder, a pressing cylinder, and a fixing piece pressing rod. A mounting plate for mounting the pump body assembly is rotatably provided on the base. A telescopic cylinder for flipping the mounting plate is provided on the base. The telescopic end of the telescopic cylinder is hinged to the mounting plate. A pressing cylinder for fixing the pump body assembly is provided on the mounting plate. Two rotatable cylinders that can rotate towards each other are provided at the bottom of the mounting plate. Fixing piece pressing rods are provided on both of the two rotatable cylinders. The two rotatable cylinders are used to drive the two fixing piece pressing rods to rotate towards each other to press the fixing piece onto the pump body assembly.

[0011] Further, the fixing piece locking device includes a second lead screw slide rail and a Z-axis locking machine. A Z-axis locking machine is provided on the slider of the second lead screw slide rail. The second lead screw slide rail is used to drive the Z-axis locking machine to translate. The Z-axis locking machine is used to lock the fixing piece to the pump body assembly with screws.

[0012] Further, the pipe joints are grouped and placed on the material tray. Each group of pipe joints includes three and corresponds to three valve body mounting ports on the pump body respectively. A first clamping claw for clamping the fixing piece is provided on the material manipulator. A second clamping claw for clamping a group of three pipe joints is also provided on the material manipulator. The second clamping claw is three tubular clamping claws corresponding to the shape and position of a group of pipe joints. When clamping, the sensors on the second clamping claw are used to detect the relative positions of the second clamping claw and the three pipe joints. When it is judged that the relative positions meet the preset conditions, it is considered that the alignment is correct, and the second clamping claw clamps the pipe joints. When it is judged that the relative positions do not meet the preset conditions, it is considered that the alignment fails, and the second clamping claw skips this group of pipe joints and moves to the next group of pipe joints to clamp again.

[0013] After the present invention adopts the above technical solutions, compared with the prior art, it has the following advantages:

[0014] The present invention integrates a feeding device, a pump body flipping device, a fixing piece locking device, and a manipulator, realizing the automatic feeding of the fixing piece, the automatic flipping of the pump body, and the automatic assembly of the fixing piece and multiple pipe joints on the urea pump, greatly improving the production efficiency, reducing the manual labor intensity, improving the installation accuracy, and being applicable to modern intelligent manufacturing production lines. By corresponding the three tubular clamping claws of the second clamping claw to the arrangement order of the three pipe joints, the pipe joints with incorrect order will not be clamped, which can effectively avoid the incorrect installation position of the pipe joints and ensure accurate installation. Multiple fixing piece limit posts are asymmetrically arranged according to the notches of the fixing piece, which can avoid the reverse placement of the fixing piece during feeding and ensure the normal feeding of the fixing piece. By setting the upper surface of the push block as an inclined surface that is higher at the front and lower at the rear, the front end of the push block can push the fixing piece forward, and the rear end of the push block can smoothly pass through the lower part of the fixing piece at the feeding end and reset when the push block resets.

[0015] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the feeding device;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the pump body flipping device;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the fixing piece locking device;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the rotary cylinder and the fixing piece pressing rod;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the manipulator;

[0022] Figure 7 It is a cross-sectional view of the feeding device.

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1. Feeding device; 101. First lead screw slide rail; 102. Stock plate; 103. Pusher block; 104. Support plate; 105. Fixing piece limit plate; 106. Fixing piece limit post; 2. Pump body flipping device; 201. Base; 202. Mounting plate; 203. Telescopic cylinder; 204. Compression cylinder; 205. Fixing piece pressing rod; 206. Rotary cylinder; 207. Positioning pin; 208. First buffer; 209. Second buffer; 3. Fixing piece locking device; 301. Second lead screw slide rail; 302. Z-axis locking machine; 4. Material manipulator; 401. First clamping jaw; 402. Second clamping jaw. Detailed Embodiments

[0025] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] As shown Figure 1-7 in the figure, a feeding and pump body flipping mechanism applicable to urea pump fixing pieces includes a feeding device 1, a pump body flipping device 2, a fixing piece locking device 3 and a material manipulator 4.

[0028] On one side of the output end of the feeding device 1, there is a pump body flipping device 2. On one side of the pump body flipping device 2, there is a fixing piece locking device 3. The material manipulator 4 is located above the pump body flipping device 2. The material manipulator 4 realizes horizontal movement through a guide rail.

[0029] The feeding device 1 includes a first screw rod slide rail 101, a stock plate 102, a push block 103 and a support plate 104. On both the left and right sides of the first screw rod slide rail 101, there are support plates 104 parallel to the first screw rod slide rail 101. On the opposite sides of the upper surfaces of the two support plates, there are horizontal chutes for supporting the two ends of the fixing piece. The two ends of the support plate 104 are respectively the feeding end and the discharging end. Above the feeding end, there is a horizontally arranged stock plate 102. In the middle of the stock plate 102, there is a blanking through hole. On the front and back sides of the blanking through hole, there are respectively a fixing piece limiting plate 105 and a fixing piece limiting column 106. Between the fixing piece limiting plate 105 and the fixing piece limiting column 106, the fixing pieces are stacked and placed. The lowermost one of a stack of fixing pieces is located at the feeding end. Multiple fixing pieces are stacked and placed on the chute inside the through hole. The first screw rod slide rail 101 is used to push the fixing piece at the feeding end forward along the chute to the discharging end through the push block 103.

[0030] The first pump body manipulator is used to clamp and place the pump body assembly from the previous station on the pump body flipping device 2. The pump body flipping device 2 is used to clamp and fix the pump body assembly. The pump body flipping device 2 is also used to drive the pump body assembly to flip from a horizontal state to a vertical state after clamping and fixing the pump body assembly. After the sensor on the pump body flipping device 2 detects that the pump body assembly has completed flipping, the material manipulator 4 is used to simultaneously clamp and install a set of three pipe joints on the pipe joint tray at the corresponding positions on the pump body assembly. The material manipulator 4 is also used to clamp the fixing piece at the discharging end and install it on the outside of the pipe joints of the pump body assembly after the pipe joint assembly is completed. The fixing piece locking device 3 is used to lock the fixing piece and the pump body assembly through bolts to uniformly fix the three pipe joints. After the fixing piece locking device 3 locks the fixing piece, the pump body flipping device 2 flips the pump body assembly from a vertical state to a horizontal state and releases the fixation of the pump body assembly. The second pump body manipulator clamps and places the assembled pump body assembly to the next station. The first pump body manipulator clamps the next pump body assembly to the pump body flipping device 2 and repeats the process of clamping and installing the pipe joints. After the sensor at the discharging end detects that the fixing piece has been clamped, the first screw rod guide rail drives the push block 103 to reset and pushes the next fixing piece to move to the discharging end again, repeating the process of clamping and installing the fixing piece.

[0031] As an implementation manner, the fixed piece limiting post 106 is adapted to the shape of the fixed piece. A groove is provided at a corresponding position in the recess on the outer side of the fixed piece. And it can only be placed between the fixed piece limiting plate 105 and the fixed piece limiting post 106 when the fixed piece is placed correctly in the front-back direction. The cavity between the lower surface of the stock plate 102 and the upper surface of the chute at the feeding end can only accommodate one fixed piece. The upper surface of the pushing block 103 is an inclined surface that is higher at the front and lower at the back, so that when the pushing block moves forward, it can smoothly push a fixed piece at the feeding end forward, and when moving backward, it can move under the fixed piece at the feeding end to the initial position without being blocked by the fixed piece at the feeding end.

[0032] Specifically, multiple fixed piece limiting posts are asymmetrically arranged according to the fixed piece grooves, having an anti-misoperation effect. A material sensor is provided on the fixed piece limiting plate 105. When the material sensor detects that the number of fixed pieces stacked between the fixed piece limiting plate 105 and multiple fixed piece limiting posts 106 is less than a certain number, a feeding signal is sent out. A clamping sensor is provided at the tail end of the support plate. After the material sensor detects a fixed piece, a clamping signal is sent to the mechanical claw. After the clamping sensor detects that the mechanical claw has taken away the fixed piece, a pushing signal is sent to the first lead screw slide rail 101, and the first lead screw slide rail 101 drives the pushing block 103 to reset for the next pushing operation.

[0033] As an implementation manner, the pump body flipping device 2 includes a base 201, a mounting plate 202, a telescopic cylinder 203, a pressing cylinder 204, and a fixed piece pressing rod 205. A mounting plate 202 for mounting the pump body assembly is rotatably provided on the base 201. A telescopic cylinder 203 for flipping the mounting plate 202 is provided on the base 201. The telescopic end of the telescopic cylinder 203 is hinged to the mounting plate 202. A pressing cylinder 204 for fixing the pump body assembly is provided on the mounting plate 202. Two rotatable cylinders 206 that can rotate towards each other are provided at the bottom of the mounting plate 202. Fixed piece pressing rods 205 are provided on both of the two rotatable cylinders 206. The two rotatable cylinders 206 are used to press the fixed piece onto the pump body assembly by driving the two fixed piece pressing rods 205 to rotate towards each other.

[0034] Specifically, the pressing cylinder 204 can rotate. A positioning pin 207 for cooperating with the pressing cylinder 204 to fix the pump body assembly, a first buffer 208 for buffering the flipping of the mounting plate 202, and a second buffer 209 for buffering the reset of the flipping of the mounting plate 202 are further provided on the mounting plate 202.

[0035] As an implementation manner, the fixing piece locking device 3 includes a second screw rod slide rail 301 and a Z-axis attaching machine 302. The Z-axis attaching machine 302 is arranged on the slider of the second screw rod slide rail 301. The second screw rod slide rail 301 is used to drive the Z-axis attaching machine 302 to translate, and the Z-axis attaching machine 302 is used to lock the fixing piece to the pump body assembly with screws.

[0036] As an implementation manner, the pipe joints are grouped and placed on the material tray. Each group of pipe joints includes three and corresponds to three valve body mounting openings on the pump body respectively. The material manipulator 4 is provided with a first clamping claw 401 for clamping the fixing piece, and the material manipulator 4 is also provided with a second clamping claw 402 for clamping a group of three pipe joints. The second clamping claw 402 is three tubular clamping claws corresponding to the shape and position of a group of pipe joints. When clamping, the sensor on the second clamping claw 402 is used to detect the relative position between the second clamping claw 402 and the three pipe joints. When it is determined that the relative position meets the preset conditions, it is considered that the alignment is correct, and the second clamping claw 402 clamps the pipe joints. When it is determined that the relative position does not meet the preset conditions, it is considered that the alignment fails, and the second clamping claw 402 skips this group of pipe joints and moves to the next group of pipe joints to clamp again.

[0037] The working process of the present invention:

[0038] First, manually arrange the materials on the tray. Arrange multiple pipe joints in groups of three according to their installation positions on the pump body assembly and place them on the tray, and stack multiple fixing pieces one by one between the fixing piece limiting plate 105 and multiple fixing piece limiting columns 106;

[0039] When the device works, the first pump body manipulator grabs the pump body assembly onto the positioning pin 207 of the mounting plate. The positioning pin 207 positions the pump body assembly. The sensor is installed on the sensor mounting bracket. When the photoelectric sensor recognizes the pump body assembly on the positioning pin 207, the pressing cylinder 204 rotates and presses down to fix the pump body assembly on the positioning pin 207. The telescopic rod of the telescopic cylinder 203 retracts, driving the entire upper mounting plate 202 to rotate 90 degrees. Then, the second clamping claw 402 of the material manipulator 4 grabs three pipe joints and assembles them at the corresponding positions on the pump body assembly. When the sensor on the second clamping claw 402 detects that the arrangement order of a group of three pipe joints on the tray does not correspond to the order of the three tubular clamping claws, the second clamping claw 402 skips this group of three pipe joints and clamps the next group of three pipe joints.

[0040] When fixed pieces need to be fed, the first lead screw slide rail 101 drives the push block 103 to push the fixed piece to the grasping position. The push block 103 can exactly push out one fixed piece during material feeding. When the clamping sensor recognizes that the first clamping jaw 401 clamps the fixed piece, the first lead screw slide rail 101 retracts the push block 103 to the initial position, and the remaining fixed pieces are restricted by the storage device mounting plate 202. After the push block 103 pushes out one fixed piece, the next fixed piece falls onto the chute due to gravity. When the push block 103 returns to the fixed piece storage position after pushing the fixed piece to the specified position, the design of the push block 103 with a higher front and lower rear prevents it from being stuck when it retracts and does not affect the position of the fixed piece. After reaching the initial position, the push block 103 continues to wait for the next material feeding signal from the front-end material sensor. When the material sensor detects that the number of fixed pieces is insufficient, it triggers a signal to remind the worker to replenish the materials. The first clamping jaw 401 places the fixed piece on the pump body assembly. After the sensor recognizes it, the fixed piece pressing rod 205 on the pressing cylinder 204 presses the fixed piece.

[0041] When the three pipe connectors and the fixed pieces are in place, the Z-axis locking machine 302 sucks the bolts and then moves to the specified installation position through the second lead screw slide rail 301 to install the bolts and lock the fixed pieces on the pump body assembly. After the locking is completed, the entire locking device resets.

[0042] The rotary cylinder 206 resets the fixed piece pressing rod 205, and the telescopic cylinder 203 extends the telescopic rod to push the upper mounting plate 202 to rotate and reset. The pressing cylinder 204 located on the upper mounting plate 202 also resets to release the fixation of the pump body assembly. Then, the second pump body manipulator clamps the assembled pump body assembly to the next process, and then the first pump body manipulator clamps a new pump body assembly to perform the repeated installation actions of the pipe connectors and the fixed pieces.

[0043] The above is an example of the best implementation mode of the present invention. The parts not described in detail are all common general knowledge of those skilled in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present invention is also within the protection scope of the present invention.

Claims

1. A feeding mechanism for urea pump fixing pieces and a pump body turning mechanism, characterized in that, It includes a feeding device (1), a pump body flipping device (2), a fixing piece locking device (3), and a material manipulator (4). On one side of the output end of the feeding device (1), there is a pump body flipping device (2). On one side of the pump body flipping device (2), there is a fixing piece locking device (3). The material manipulator (4) is located above the pump body flipping device (2). The material manipulator (4) realizes horizontal movement through a guide rail. The feeding device (1) includes a first lead screw slide rail (101), a stock plate (102), a push block (103), and a support plate (104). On both the left and right sides of the first lead screw slide rail (101), there are support plates (104) parallel to the first lead screw slide rail (101). On the relative sides of the upper surfaces of the two support plates, there are horizontal chutes for supporting the two ends of the fixing piece. The two ends of the support plate (104) are respectively the feeding end and the discharging end. Above the feeding end, there is a horizontally arranged stock plate (102). In the middle of the stock plate (102), there is a blanking through hole. On the front and back sides of the blanking through hole, there are respectively a fixing piece limiting plate (105) and a fixing piece limiting post (106). Between the fixing piece limiting plate (105) and the fixing piece limiting post (106), the fixing pieces are stacked for placement. The lowermost one of a stack of fixing pieces is located at the feeding end. Multiple fixing pieces are stacked and placed on the chute inside the through hole. The first lead screw slide rail (101) is used to push the fixing piece at the feeding end forward along the chute to the discharging end through the push block (103). The first pump body manipulator is used to pick up the pump body assembly from the previous station and place it on the pump body flipping device (2). The pump body flipping device (2) is used to clamp and fix the pump body assembly. The pump body flipping device (2) is also used to drive the pump body assembly to flip from a horizontal state to a vertical state after clamping and fixing the pump body assembly. After the sensor on the pump body flipping device (2) detects that the pump body assembly has completed flipping, the material manipulator (4) is used to pick up a set of three pipe joints on the pipe joint tray and install them at the corresponding positions on the pump body assembly. The material manipulator (4) is also used to pick up the fixing piece at the discharging end and install it on the outside of the pipe joints of the pump body assembly after the pipe joint assembly is completed. The fixing piece locking device (3) is used to lock the fixing piece and the pump body assembly through bolts to uniformly fix the three pipe joints. After the fixing piece locking device (3) locks the fixing piece, the pump body flipping device (2) flips the pump body assembly from a vertical state to a horizontal state and releases the fixation of the pump body assembly. The second pump body manipulator picks up the assembled pump body assembly and places it on the next station. The first pump body manipulator picks up the next pump body assembly and places it on the pump body flipping device (2), repeating the process of picking up and installing the pipe joints. After the sensor at the discharging end detects that the fixing piece has been picked up, the first lead screw guide rail drives the push block (103) to reset and then pushes the next fixing piece to move to the discharging end, repeating the process of picking up and installing the fixing piece.

2. The urea pump fixing piece feeding and pump body turning mechanism according to claim 1, characterized in that, The fixed piece limiting post (106) is adapted to the shape of the fixed piece. A groove is provided at a corresponding position in the depression on the outer side of the fixed piece. And it can only be placed between the fixed piece limiting plate (105) and the fixed piece limiting post (106) when the fixed piece is placed correctly in the front-back direction. The cavity between the lower surface of the stock plate (102) and the upper surface of the chute at the feeding end can only accommodate one fixed piece. The upper surface of the push block (103) is an inclined surface with the front end higher than the rear end, so that when the push block moves forward, it can smoothly push a fixed piece at the feeding end forward, and when moving backward, it can move below the fixed piece at the feeding end to the initial position without being blocked by the fixed piece at the feeding end.

3. The urea pump fixing piece feeding and pump body turning mechanism according to claim 1, wherein The pump body flipping device (2) includes a base (201), a mounting plate (202), a telescopic cylinder (203), a pressing cylinder (204) and a fixed piece pressing rod (205). A mounting plate (202) for mounting the pump body assembly is rotatably provided on the base (201). A telescopic cylinder (203) for flipping the mounting plate (202) is provided on the base (201). The telescopic end of the telescopic cylinder (203) is hinged to the mounting plate (202). A pressing cylinder (204) for fixing the pump body assembly is provided on the mounting plate (202). Two rotatable rotary cylinders (206) are provided at the bottom of the mounting plate (202). Fixed piece pressing rods (205) are provided on both of the two rotary cylinders (206). The two rotary cylinders (206) are used to drive the two fixed piece pressing rods (205) to rotate towards each other to press the fixed piece on the pump body assembly.

4. The urea pump fixing piece feeding and pump body turnover mechanism according to claim 1, characterized in that, The fixed piece locking device (3) includes a second screw rod slide rail (301) and a Z-axis attaching machine (302). A Z-axis attaching machine (302) is provided on the slider of the second screw rod slide rail (301). The second screw rod slide rail (301) is used to drive the Z-axis attaching machine (302) to translate. The Z-axis attaching machine (302) is used to lock the fixed piece to the pump body assembly with screws.

5. The urea pump fixing piece feeding and pump body turning mechanism according to claim 1, characterized in that The pipe connectors are grouped and placed on the material tray. Each group of pipe connectors includes three and corresponds to three valve body mounting openings on the pump body respectively. A first clamping claw (401) for clamping the fixed piece is provided on the material manipulator (4). A second clamping claw (402) for clamping a group of three pipe connectors is also provided on the material manipulator (4). The second clamping claw (402) is three tubular clamping claws corresponding to the shape and position of a group of pipe connectors. When clamping, the sensors on the second clamping claw (402) are used to detect the relative positions of the second clamping claw (402) and the three pipe connectors. When it is judged that the relative positions meet the preset conditions, it is considered that the alignment is correct, and the second clamping claw (402) clamps the pipe connectors. When it is judged that the relative positions do not meet the preset conditions, it is considered that the alignment fails, and the second clamping claw (402) skips this group of pipe connectors and moves to the next group of pipe connectors to clamp again.

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