Water ring vacuum pump assembly tool

Abstract

The utility model relates to a water ring vacuum pump assembly tool, and relates to the technical field of assembly tools, the water ring vacuum pump assembly tool comprises a placing plate, a pump body is installed on the placing plate, an input hole, a rotation stopping pin hole and a plurality of installation screw holes are formed in the pump body, an installation groove coaxial with the input hole is formed in the inner bottom wall of the pump body, and the installation groove is used for installing a static ring; a positioning assembly for positioning the pump body is arranged on the placing plate, a centering assembly for keeping the stationary ring and the mounting groove coaxial is further arranged on the placing plate, the centering assembly comprises a positioning rod arranged on the placing plate, the positioning rod and the mounting groove are coaxially arranged, a mounting cylinder is movably arranged on the positioning rod, the positioning rod movably penetrates through the mounting cylinder and is coaxially arranged with the mounting cylinder, and the positioning rod is movably arranged on the mounting cylinder. One end of the mounting cylinder is open, the open end of the mounting cylinder is movably attached to the inner bottom wall of the pump body, and a plurality of abutting blocks are arranged in the mounting cylinder in a sliding mode. The water ring vacuum pump has the effects of improving the mounting precision of the static ring, reducing abrasion of the static ring and improving the sealing performance of the water ring vacuum pump.

Description

Technical Field

[0001] This application relates to the technical field of vacuum pump assembly tooling, and particularly to a water ring vacuum pump assembly tooling. Background Technique

[0002] A water ring vacuum pump is a rotary variable volume vacuum pump. Its working principle is that an eccentric rotor with fixed blades is installed in the pump. The working liquid is thrown towards the stator wall to form a liquid ring concentric with the stator. The liquid ring and the rotor blades together form a variable volume, thereby realizing air intake, compression, and exhaust. Therefore, when assembling a water ring vacuum pump, it is necessary to ensure good sealing performance of the pump body to continuously and stably extract gas.

[0003] Currently, the common mechanical seal is used for the seal between the motor shaft and the pump body of a water ring vacuum pump. The mechanical seal includes a stationary ring, a rotating ring, and a sealing ring, etc. The water ring vacuum pump includes a pump body with one end open, a pump cover for plugging the open end of the pump body, an impeller, and a motor. An input hole for the motor shaft to penetrate is opened on the inner bottom wall of the pump body. The input hole is in the shape of a sunk groove. The stationary ring is installed in the sunk groove of the input hole and sleeved on the motor shaft. A plurality of mounting screw holes are opened on one side of the pump body far from the open end. The plurality of mounting screw holes are arranged at equal intervals along the circumferential direction of the pump body. Bolts are threadedly assembled in the mounting screw holes. The pump body and the motor are fixed by bolts. A rotation prevention groove for preventing rotation is opened on the stationary ring. A rotation prevention pin hole is opened at the sunk groove of the input hole of the pump body. The rotation prevention pin hole corresponds to the rotation prevention groove. A rotation prevention pin is movably arranged in the rotation prevention pin hole. One end of the rotation prevention pin is movably inserted into the rotation prevention groove. The sealing ring and the stationary ring are sequentially installed in the input hole, and the outer peripheral wall of the stationary ring abuts against the inner peripheral wall of the input hole.

[0004] During installation, the technician places the pump body on the operating table, puts the sealing ring into the sunk groove of the input hole, and then the technician presses the stationary ring into the sunk groove of the input groove with both hands, making the stationary ring coaxial with the input hole and closely fitting with the inner side of the sunk groove of the input hole. Immediately afterwards, the technician screws in the rotation prevention pin and makes the rotation prevention pin insert into the rotation prevention groove, making it difficult for the stationary ring to rotate in the sunk groove of the input hole. Then the technician installs the pump body on the motor through bolts, makes the motor shaft pass through the stationary ring, and then coaxially installs the rotating ring on the motor shaft. At this time, the stationary ring and the rotating ring are in movable and close contact. Finally, the technician coaxially fixes the impeller on the motor shaft and installs the pump cover.

[0005] In view of the above related technologies, when installing the stationary ring, since the inner side wall of the sunk groove of the input hole needs to be closely fitted with the stationary ring, the outer diameter of the stationary ring is slightly larger than the inner diameter of the sunk groove of the input hole. When the technician presses the stationary ring with both hands, it is not easy to press the stationary ring coaxially with the input hole into the sunk groove of the input hole. And when applying pressure with both hands, the downward pressure is not easy to act evenly on the stationary ring, thereby making the coaxiality between the stationary ring and the axis of the motor shaft exceed the design range, increasing the wear between the stationary ring and the rotating ring, and reducing the sealing performance of the water ring vacuum pump. Summary of the Utility Model

[0006] In order to improve the installation accuracy of the stationary ring, reduce the wear between the stationary ring and the rotating ring, and improve the sealing performance of the water ring vacuum pump, the present application provides an assembly tooling for the water ring vacuum pump.

[0007] The assembly tooling for the water ring vacuum pump provided by the present application adopts the following technical solutions:

[0008] An assembly tooling for a water ring vacuum pump, including a placement plate, the pump body is installed on the placement plate, the pump body is provided with an input hole, a stop pin hole, and a plurality of installation screw holes, an installation groove coaxial with the input hole is provided on the inner bottom wall of the pump body, the installation groove is for installing the stationary ring, a stop groove corresponding to the stop pin hole is provided on the stationary ring, a positioning assembly for positioning the pump body is provided on the placement plate, and a centering assembly for keeping the stationary ring coaxial with the installation groove is further provided on the placement plate;

[0009] The centering assembly includes a positioning rod provided on the placement plate, the positioning rod is coaxially arranged with the installation groove, an installation cylinder is movably arranged on the positioning rod, the positioning rod movably penetrates through the installation cylinder and is coaxially arranged with the installation cylinder, one end of the installation cylinder is open, the open end of the installation cylinder is movably attached to the inner bottom wall of the pump body, a plurality of pressing blocks are slidably arranged in the installation cylinder, the plurality of pressing blocks are evenly spaced along the circumferential direction of the installation cylinder, the stationary ring is installed in the installation cylinder, the side of the pressing block close to the axis of the installation cylinder is movably pressed against the outer peripheral wall of the stationary ring, the plurality of pressing blocks move closer to each other to clamp and fix the stationary ring, the cavity surrounded by the plurality of pressing blocks is always coaxial with the installation cylinder, a synchronizing member for synchronously adjusting the plurality of pressing blocks is provided on the installation cylinder, and a driving member for driving the stationary ring to be pressed into the installation groove coaxially with the installation groove is further provided on the installation cylinder.

[0010] By adopting the above technical solutions, when installing the stationary ring, the technician places the pump body on the placement plate, positions the pump body through the positioning assembly, makes the installation groove of the pump body coaxial with the positioning rod, installs the sealing ring in the installation groove, then the technician places the stationary ring into the installation cylinder so that the stationary ring is located between the plurality of pressing blocks, drives the plurality of pressing blocks to slide towards the stationary ring through the synchronizing member and presses against the outer peripheral wall of the stationary ring, to achieve the coaxiality of the stationary ring and the installation cylinder, then the technician places the installation cylinder together with the stationary ring into the pump body, makes the installation cylinder sleeved on the positioning rod, and the side of the open end of the installation cylinder is attached to the inner bottom wall of the pump body, to achieve the coaxiality of the stationary ring and the installation groove, and then presses down the stationary ring through the driving member, to achieve pressing the stationary ring into the installation groove coaxially with the installation groove, which is convenient for the technician to install, and at the same time improves the installation accuracy of the stationary ring, reduces the wear of the stationary ring, and improves the sealing performance of the water ring vacuum pump.

[0011] Optionally, the synchronizing member includes a synchronizing ring coaxially and threadedly assembled on the inner peripheral wall of the mounting cylinder. The pressing block is located on one side of the synchronizing ring close to the opening end of the mounting cylinder. The end sides of the synchronizing ring and the pressing block close to each other are both sharp. The inclined side of the synchronizing ring is in movable abutment with the inclined side of the pressing block. One end of the synchronizing ring away from the sharp end protrudes from the mounting cylinder.

[0012] By adopting the above technical solution, when installing the stationary ring, the technician places the stationary ring into the mounting cylinder so that the stationary ring is located between multiple pressing blocks. Then the technician rotates the synchronizing ring. The synchronizing ring moves along the axis of the mounting cylinder in the mounting cylinder, so that the inclined side of the synchronizing ring abuts against the inclined sides of multiple pressing blocks, and drives multiple pressing blocks to slide synchronously in the direction close to the stationary ring, realizing the coaxiality of the stationary ring and the mounting cylinder, simplifying the operation steps of centering the stationary ring. At the same time, the end of the synchronizing ring protruding from the mounting cylinder is convenient for the technician to operate and rotate the synchronizing ring.

[0013] Optionally, the driving member includes a pressing column slidably arranged on the synchronizing ring. The pressing column slides along the axis of the synchronizing ring. The synchronizing ring is provided with a limiting structure for restricting the separation of the pressing column from the synchronizing ring. One side of the pressing column close to the opening end of the mounting cylinder is in movable abutment with the stationary ring. The other end of the pressing column protrudes from the mounting cylinder. A central hole is opened on the axis of the pressing column. The positioning rod is in movable fit with the inner peripheral wall of the central hole. The positioning rod is coaxially provided with a fastening nut. The fastening nut is threadedly adapted to the positioning rod. The fastening nut is in movable abutment with the side of the pressing column away from the inside of the mounting cylinder.

[0014] By adopting the above technical solution, when the technician places the stationary ring into the mounting cylinder, due to the arranged limiting structure, the pressing column is not easily separated from the synchronizing ring, reducing the risk of the pressing column falling. After the stationary ring and the mounting cylinder are in a coaxial position, the technician places the mounting cylinder together with the stationary ring into the pump body and makes the positioning rod pass through the central hole. The positioning rod is in fit with the inner peripheral wall of the central hole to realize the coaxiality of the stationary ring and the mounting groove. Then the technician rotates the fastening nut. The fastening nut drives the pressing column to slide in the direction close to the mounting groove, so that the pressing column abuts against the stationary ring and presses the stationary ring coaxially into the mounting groove, which is convenient for the technician to install the stationary ring.

[0015] Optionally, a guide post is provided on the side of the pressing block away from the axis of the mounting cylinder. A plurality of guide holes corresponding to the plurality of guide posts are formed on the side wall of the mounting cylinder. The guide posts are slidably fitted with the guide holes. The cross section of the guide post is polygonal, and the guide post is in contact with the inner wall of the guide hole. The end face of the pressing block close to the open end of the mounting cylinder is flush with the end face of the open end of the mounting cylinder. A reset member is provided on the side of the pressing block close to the guide post. The reset member always slides the guide post in a direction away from the axis of the mounting cylinder, and the guide post always protrudes from the outer peripheral wall of the mounting cylinder.

[0016] By adopting the above technical solution, when the stationary ring is placed into the mounting cylinder, the reset member drives the guide post to slide in the guide hole in a direction away from the axis of the mounting cylinder, driving the plurality of pressing blocks to slide away from each other, leaving a placement space for the stationary ring, making it difficult for the pressing blocks to hinder the technician from placing the stationary ring into the mounting cylinder and facilitating the operation of the technician.

[0017] When installing the stationary ring, the technician rotates the pressing nut and gently presses the guide post with a finger. When the stationary ring is pressed into the mounting groove coaxially with the mounting groove, the pressing block is in a separated state from the stationary ring, and the guide post has a tendency to slide in a direction close to the axis of the mounting cylinder. At this time, the stationary ring is installed in place, and the technician can stop rotating the pressing nut, reducing the risk of deformation and damage of the stationary ring due to excessive force.

[0018] Optionally, a rotating groove is formed on the placement plate. One end of the positioning rod is movably inserted into the rotating groove and is in movable contact with the inner peripheral wall of the rotating groove. An ear plate is provided at the end of the positioning rod located in the rotating groove. A plugging groove is formed on the side of the placement plate close to the positioning rod. The ear plate is movably inserted into the plugging groove. A rotation limiting groove for the ear plate to rotate is formed on the side wall of the plugging groove. The ear plate is in movable contact with the inner side wall of the rotation limiting groove. The plugging groove is opened along the axial direction of the positioning rod, and the rotation limiting groove is opened along the circumferential direction of the positioning rod.

[0019] By adopting the above technical solution, after the stationary ring is installed, the technician rotates the positioning rod, driving the ear plate to rotate in the rotation limiting groove until the ear plate is in a position corresponding to the plugging groove. Then the technician pulls out the positioning rod from the rotating groove, separating the ear plate from the plugging groove, and at the same time the positioning rod moves away from the placement plate. At this time, the ear plate abuts against the side of the pressing column close to the open end of the mounting cylinder, facilitating the technician to take out the positioning rod together with the pressing column from the pump body. When disassembling the pump body and the placement plate, it is not easy for the positioning rod to collide with the stationary ring, reducing the risk of damaging the stationary ring. When installing next time, the technician first places the pump body on the placement plate and then installs the positioning rod on the placement plate, facilitating the installation of the pump body and the placement plate next time.

[0020] Optionally, a first marking line is provided on the end face of the positioning rod away from the placement plate. The first marking line is arranged along the radial direction of the positioning rod. Second marking lines are provided on both end faces of the mounting cylinder. The two second marking lines correspond to each other and are arranged along the radial direction of the mounting cylinder. When the static ring is pressed into the mounting groove, the first marking line points to the anti-rotation pin hole on the pump body, and both of the two second marking lines point to the anti-rotation groove on the static ring and correspond to the first marking line.

[0021] By adopting the above technical solution, when installing the static ring, the technician places the static ring into the mounting cylinder so that the static ring is located between multiple pressing blocks. Then, the technician adjusts the static ring to make the anti-rotation groove on the static ring correspond to the second marking line near the open end of the mounting cylinder. Then, the technician rotates the synchronous ring to coaxialize the static ring with the mounting cylinder. Then, the technician sleeves the pressing column on the positioning rod to make the second marking line away from the open end of the mounting cylinder correspond to the first marking line. Then, the technician places the mounting cylinder together with the static ring and the pressing column along the axis of the positioning rod into the pump body, making the end face of the open end of the mounting cylinder fit with the inner bottom wall of the pump body. Then, the technician rotates the pressing nut to press the static ring coaxial with the mounting groove into the mounting groove. At this time, the anti-rotation groove and the anti-rotation pin hole are in a relative position, facilitating the subsequent operation of the technician.

[0022] Optionally, the positioning assembly includes a plurality of positioning columns provided on the placement plate. The plurality of positioning columns correspond to the plurality of mounting screw holes one by one, and the positioning columns are movably inserted into the mounting screw holes.

[0023] By adopting the above technical solution, when installing the static ring, the technician places the pump body on the placement plate and inserts the plurality of positioning columns into the mounting screw holes. At this time, the mounting groove and the rotating groove of the pump body are in a coaxial state, realizing the positioning of the pump body and facilitating the subsequent installation of the static ring.

[0024] Optionally, a buffer block is provided on one side of the pressing block close to the open end of the mounting cylinder. The side of the buffer block away from the pressing block is flush with one side of the open end of the mounting cylinder.

[0025] By adopting the above technical solution, when the technician rotates the pressing nut to press the static ring into the mounting groove, the technician gently presses the guiding column with a finger. When the static ring is pressed into the mounting groove coaxial with the mounting groove, the guiding column has a tendency to slide towards the direction close to the axis of the mounting cylinder. Due to the provided buffer block, when the pressing block slides towards the direction close to the axis of the mounting cylinder, the buffer block fits with the end face of the static ring, reducing the risk of scratching the end face of the static ring.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By means of the provided placement plate, positioning rods provided on the placement plate, mounting cylinders coaxially arranged with the positioning rods and movably arranged on the positioning rods, multiple pressing blocks slidably arranged on the mounting cylinders, synchronous rings rotatably arranged on the inner peripheral wall of the mounting cylinders, driving members provided on the mounting cylinders, and positioning components provided on the placement plate, technicians place the pump body on the placement plate, position the pump body through the positioning components so that the mounting groove of the pump body is coaxial with the positioning rods. Then, the technicians place the stationary ring into the mounting cylinder and rotate the synchronous ring to drive the multiple pressing blocks to move closer to each other to clamp and fix the stationary ring, making the stationary ring coaxial with the mounting cylinder. Then, the technicians place the mounting cylinder together with the stationary ring into the pump body, and make the mounting cylinder sleeved on the positioning rod and the end side of the open end of the mounting cylinder fit with the inner bottom wall of the pump body. The stationary ring is coaxially pressed into the mounting groove through the driving member, which is convenient for technicians to install, improves the installation accuracy of the stationary ring, reduces the wear between the stationary ring and the rotating ring, and improves the sealing performance of the water ring vacuum pump;

[0028] 2. By means of the guiding columns slidably arranged in the mounting cylinder, resetting members provided on the pressing blocks, and buffer blocks provided on one side of the pressing blocks close to the open end of the mounting cylinder, when the stationary ring is placed into the mounting cylinder, the resetting members drive the guiding columns to slide in the guiding holes in the direction away from the axis of the mounting cylinder, making it difficult for the pressing blocks to hinder the technicians from placing the stationary ring into the mounting cylinder, which is convenient for technicians to operate. When installing the stationary ring, the technicians rotate the pressing nut and gently press the guiding columns with their fingers. When the stationary ring is coaxially pressed into the mounting groove, the pressing blocks are in a separated state from the stationary ring, and the guiding columns tend to slide in the direction close to the axis of the mounting cylinder. At this time, the stationary ring is installed in place, and the technicians can stop rotating the pressing nut, reducing the risk of deformation and damage of the stationary ring caused by excessive force. At the same time, the provided buffer blocks reduce the risk of scratching the end face of the stationary ring when the pressing blocks slide in the direction close to the axis of the mounting cylinder;

[0029] 3. By means of the first marking line provided on the side of the positioning rod away from the placement plate and the two second marking lines opened on both end sides of the mounting cylinder, when installing the stationary ring, the technicians place the stationary ring into the mounting cylinder so that the stationary ring is located between the multiple pressing blocks. Then, the technicians adjust the stationary ring so that the anti-rotation groove of the stationary ring corresponds to the second marking line close to the open end of the mounting cylinder. Then, the technicians rotate the synchronous ring to make the stationary ring coaxial with the mounting cylinder. Then, the technicians sleeved the pressing column on the positioning rod so that the second marking line away from the open end of the mounting cylinder corresponds to the first marking line. Then, the technicians place the mounting cylinder together with the stationary ring and the pressing column along the axis of the positioning rod into the pump body, making the end face of the open end of the mounting cylinder fit with the inner bottom wall of the pump body. Then, the technicians rotate the pressing nut to press the stationary ring coaxially into the mounting groove. At this time, the anti-rotation groove and the anti-rotation pin hole are in a relative position, which is convenient for technicians' subsequent operations. Description of the Drawings

[0030] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the connection structure of the installation cylinder, the synchronous ring, the downward pressure column and the positioning rod;

[0032] Figure 3 It is a schematic diagram of the connection structure of the positioning rod and the placement plate.

[0033] Reference numerals: 1, placement plate; 11, rotation groove; 12, insertion groove; 13, rotation limiting groove; 2, positioning assembly; 21, positioning column; 3, centering assembly; 31, positioning rod; 32, installation cylinder; 321, guiding hole; 33, abutting block; 331, guiding column; 332, resetting member; 333, buffer block; 34, synchronizing member; 341, synchronous ring; 35, driving member; 351, downward pressure column; 352, central hole; 353, abutting nut; 4, limiting structure; 41, limiting block; 42, limiting groove; 5, ear plate; 6, first marking line; 7, second marking line; 8, pump body; 81, input hole; 82, rotation stopping pin hole; 83, installation screw hole; 84, installation groove; 85, rotation stopping pin; 86, sealing ring; 9, stationary ring; 91, rotation stopping groove. Detailed implementation manners

[0034] The following further describes the present application in detail with reference to the Figures 1-3 accompanying drawings.

[0035] An embodiment of the present application discloses an assembly tool for a water-ring vacuum pump. Referring to Figure 1 and Figure 2 , the assembly tool for the water-ring vacuum pump includes a placement plate 1 horizontally fixed on an operating table. The pump body 8 is installed on the placement plate 1, the axis of the pump body 8 is arranged in the vertical direction, an input hole 81, a rotation stopping pin hole 82 and a plurality of installation screw holes 83 are formed in the pump body 8, an installation groove 84 coaxial with the input hole 81 is formed in the inner bottom wall of the pump body 8, the installation groove 84 is for installing the stationary ring 9, a rotation stopping groove 91 corresponding to the rotation stopping pin hole 82 is formed in the stationary ring 9, a rotation stopping pin 85 is threadedly connected in the rotation stopping pin hole 82, and one end of the rotation stopping pin 85 is movably inserted into the rotation stopping groove 91.

[0036] In order to position the pump body 8 during installation and make the positioning rod 31 coaxial with the installation groove 84 of the pump body 8, a positioning assembly 2 is provided on the placement plate 1. Referring to Figure 1 and Figure 3, the positioning component 2 includes a plurality of positioning posts 21 fixed to the top side of the placement plate 1. The plurality of positioning posts 21 correspond one-to-one with a plurality of mounting screw holes 83 on the pump body 8. The positioning posts 21 are movably inserted into the mounting screw holes 83. In this application, there are four positioning posts 21. In other embodiments, the number of positioning posts 21 can also be three, five, six, etc. As long as multiple positioning posts 21 are movably inserted into the mounting screw holes 83 to make the positioning rod 31 coaxial with the mounting groove 84 and do not affect the subsequent fixation of the pump body 8 and the motor.

[0037] Before installing the stationary seal ring 9, the technician places the pump body 8 on the placement plate 1 and inserts the four positioning posts 21 into the mounting screw holes 83. At this time, the mounting groove 84 of the pump body 8 is coaxial with the positioning rod 31, realizing the positioning of the pump body 8. Then, the technician installs the sealing ring 86 into the mounting groove 84 to facilitate the subsequent installation of the stationary seal ring 9.

[0038] After the stationary seal ring 9 is installed, the technician separates the pump body 8 from the placement plate 1 and screws the anti-rotation pin 85 into the anti-rotation pin hole 82, so that one end of the anti-rotation pin 85 is movably inserted into the anti-rotation groove 91, making the stationary seal ring 9 not easy to rotate in the mounting groove 84.

[0039] In order to keep the stationary seal ring 9 coaxial with the mounting groove 84, a centering component 3 is provided on the placement plate 1. Refer to Figure 1 and Figure 2 , the centering component 3 includes a positioning rod 31 provided on the placement plate 1. The axis of the positioning rod 31 is arranged in the vertical direction and is coaxial with the mounting groove 84. An installation cylinder 32 is movably provided on the positioning rod 31. The positioning rod 31 movably penetrates through the installation cylinder 32 and is coaxial with the installation cylinder 32. The bottom end of the installation cylinder 32 is open. The open end of the installation cylinder 32 is movably attached to the inner bottom wall of the pump body 8. A plurality of pressing blocks 33 are slidably arranged in the installation cylinder 32. The plurality of pressing blocks 33 are evenly spaced along the circumference of the installation cylinder 32, and the plurality of pressing blocks 33 slide along the radial direction of the installation cylinder 32. The stationary seal ring 9 is installed in the installation cylinder 32. The side of the pressing block 33 close to the axis of the installation cylinder 32 is movably pressed against the outer peripheral wall of the stationary seal ring 9. The plurality of pressing blocks 33 move closer to each other to clamp the stationary seal ring 9. The cavity surrounded by the plurality of pressing blocks 33 is always coaxial with the installation cylinder 32. In this application, the pressing blocks 33 are set to four. In other embodiments, the number of pressing blocks 33 can also be three, five, six, etc. As long as multiple pressing blocks 33 move closer to each other to clamp the stationary seal ring 9 and the cavity surrounded by the plurality of pressing blocks 33 is always coaxial with the stationary seal ring 9.

[0040] In order to facilitate the technician to put the stationary seal ring 9 into the installation cylinder 32 and help improve the stability of the adjustment of the pressing blocks 33, refer to Figure 1 and Figure 2, on the side of the pressing block 33 away from the axis of the mounting cylinder 32, a guiding column 331 is fixed. Four guiding holes 321 corresponding to the four guiding columns 331 are provided on the peripheral wall of the mounting cylinder 32. The guiding column 331 slides in the guiding hole 321 and fits against the inner wall of the guiding hole 321. In this application, the cross-section of the guiding column 331 is a regular quadrilateral shape. In other embodiments, the cross-section of the guiding column 331 can also be a triangular, pentagonal, hexagonal or other polygonal shape, as long as the guiding column 331 can slide in the guiding hole 321 without rotating. On the side of the pressing block 33 close to the open end of the mounting cylinder 32, a buffer block 333 is fixed. The end face of the buffer block 333 away from the pressing block 33 is flush with the end face of the open end of the mounting cylinder 32. On the side of the pressing block 33 close to the guiding column 331, a reset member 332 is provided. In this application, the reset member 332 is a reset spring. The reset spring always makes the guiding column 331 slide in the direction away from the axis of the mounting cylinder 32, and the guiding column 331 always protrudes from the outer peripheral wall of the mounting cylinder 32.

[0041] In order to synchronously adjust multiple pressing blocks 33 and simplify the operation steps of centering the stationary ring 9, a synchronizing member 34 is provided on the mounting cylinder 32. Refer to Figure 1 and Figure 2 , the synchronizing member 34 includes a synchronizing ring 341 threadedly assembled coaxially on the inner peripheral wall of the mounting cylinder 32. The pressing block 33 is located on the side of the synchronizing ring 341 close to the bottom end of the mounting cylinder 32. The end sides of the synchronizing ring 341 and the pressing block 33 close to each other are both sharp. The inclined side of the synchronizing ring 341 is in movable contact with the inclined side of the pressing block 33, and the end of the synchronizing ring 341 away from the sharp end protrudes from the mounting cylinder 32.

[0042] In order to press the stationary ring 9 coaxially into the mounting groove 84 to facilitate the technician to install the stationary ring 9, a driving member 35 is provided on the mounting cylinder 32. Refer to Figure 1 and Figure 2, the driving member 35 includes a pressing column 351 slidably disposed on the synchronous ring 341. The pressing column 351 slides along the axial direction of the synchronous ring 341. The outer diameter of the pressing column 351 is slightly smaller than the outer diameter of the stationary ring 9. A limiting structure 4 for restricting the separation of the pressing column 351 from the synchronous ring 341 is provided on the synchronous ring 341. The limiting structure 4 includes a limiting block 41 fixed on the inner peripheral wall of the synchronous ring 341. A limiting groove 42 for the limiting block 41 to slide along the axial direction of the synchronous ring 341 is formed on the outer peripheral wall of the pressing column 351. The limiting block 41 is in movable abutment with the inner wall of the limiting groove 42. In order to improve the stability when the limiting block 41 fits with the inner wall of the limiting groove 42, both the limiting block 41 and the limiting groove 42 are provided with two. The two limiting blocks 41 and the two limiting grooves 42 correspond one by one. The two limiting blocks 41 are arranged at equal intervals along the circumferential direction of the synchronous ring 341. One side of the pressing column 351 close to the opening end of the mounting cylinder 32 is in movable abutment with the stationary ring 9. The other end of the pressing column 351 protrudes from the mounting cylinder 32. A central hole 352 is formed on the axis of the pressing column 351. The positioning rod 31 is in movable fit with the inner peripheral wall of the central hole 352. A tightening nut 353 is coaxially provided on the positioning rod 31. One end of the positioning rod 31 away from the placing plate 1 is provided with a thread. The tightening nut 353 is threadedly adapted to the positioning rod 31. The tightening nut 353 moves along the axial direction of the positioning rod 31 and is in movable abutment with one side of the pressing column 351 away from the inside of the mounting cylinder 32.

[0043] When installing the stationary ring 9, the technician turns the opening end of the mounting cylinder 32 upward. The reset member 332 drives the guiding column 331 to slide in the guiding hole 321 in a direction away from the axis of the mounting cylinder 32, driving the four pressing blocks 33 to slide away from each other, leaving a placement space for the stationary ring 9, making it difficult for the pressing blocks 33 to hinder the technician from placing the stationary ring 9 into the mounting cylinder 32, facilitating the technician to place the stationary ring 9 into the mounting cylinder 32, and making the stationary ring 9 located between the plurality of pressing blocks 33. At this time, the horizontal end face of the limiting block 41 close to the pressing block 33 abuts against the horizontal inner side wall of the limiting groove 42 close to the opening end of the mounting cylinder 32, making it difficult for the pressing column 351 to separate from the synchronous ring 341, reducing the risk of the pressing column 351 falling, facilitating the technician's operation. Then the technician rotates the synchronous ring 341. The synchronous ring 341 moves in the mounting cylinder 32 along the axis of the mounting cylinder 32 in a direction close to the pressing blocks 33, making the inclined side of the synchronous ring 341 abut against the inclined sides of the plurality of pressing blocks 33, and driving the plurality of pressing blocks 33 to slide synchronously in a direction close to the stationary ring 9 and clamp the stationary ring 9. At this time, one side of the pressing block 33 close to the axis of the mounting cylinder 32 abuts against the outer peripheral wall of the stationary ring 9, realizing the coaxiality of the stationary ring 9 and the mounting cylinder 32, simplifying the operation steps of centering the stationary ring 9. At the same time, one end of the synchronous ring 341 protruding from the mounting cylinder 32 facilitates the technician to operate and rotate the synchronous ring 341.

[0044] Then, the technician places the installation cylinder 32 together with the stationary ring 9 into the pump body 8, and makes the positioning rod 31 pass through the central hole 352. The positioning rod 31 is in contact with the inner peripheral wall of the central hole 352, so that the stationary ring 9 is coaxial with the installation groove 84. Then, the technician rotates the fastening nut 353, and at the same time gently presses the guiding column 331 with a finger. The fastening nut 353 moves along the axis direction of the positioning rod 31 and abuts against the side of the pressing column 351 away from the inside of the installation cylinder 32, driving the pressing column 351 to press the stationary ring 9 and slide towards the installation groove 84, realizing the operation of pressing the stationary ring 9 coaxially into the installation groove 84, which is convenient for the technician to install the stationary ring 9. At this time, the abutting block 33 is separated from the stationary ring 9, and the guiding column 331 has a tendency to slide towards the axis of the installation cylinder 32 and fit with the outer peripheral wall of the pressing column 351, that is, the stationary ring 9 is installed in place. The technician can stop rotating the fastening nut 353, reducing the risk of deformation and damage of the stationary ring 9 due to excessive force. At the same time, due to the buffer block 333 provided, when the abutting block 33 slides towards the axis of the installation cylinder 32, the buffer block 333 contacts the end face of the stationary ring 9, reducing the risk of scratching the end face of the stationary ring 9.

[0045] Through the above solution, it is convenient for the technician to install, and at the same time improves the installation accuracy of the stationary ring 9, reduces the wear of the stationary ring 9, and improves the sealing performance of the water ring vacuum pump.

[0046] Furthermore, in order to prevent the positioning rod 31 from colliding with the stationary ring 9 easily when disassembling the pump body 8 and reduce the risk of damaging the stationary ring 9, referring to Figure 1 、 Figure 2 and Figure 3 ,a rotating groove 11 is opened on the top side of the placing plate 1. One end of the positioning rod 31 is inserted into the rotating groove 11 along the axis direction of the positioning rod 31 and is in movable contact with the inner peripheral wall of the rotating groove 11. An ear plate 5 is fixed at the end of the positioning rod 31 located in the rotating groove 11. An insertion slot 12 is opened on the top side of the placing plate 1. The insertion slot 12 is opened along the axis direction of the positioning rod 31. The ear plate 5 is inserted into the insertion slot 12 movably. A rotation limiting groove 13 for the ear plate 5 to rotate is opened on the side wall of the insertion slot 12. The rotation limiting groove 13 is opened along the circumferential direction of the positioning rod 31. The ear plate 5 is in movable contact with the inner side wall of the rotation limiting groove 13. The rotation direction of the ear plate 5 when it rotates in the rotation limiting groove 13 until it is in contact with the inner side wall of the rotation limiting groove 13 is the same as the thread rotation direction of the fastening nut 353. In order to increase the installation stability of the positioning rod 31 and the placing plate 1, there are two ear plates 5, and the two ear plates 5 are arranged at equal intervals along the circumferential direction of the positioning rod 31. There are two insertion slots 12 and two rotation limiting grooves 13, and the two ear plates 5 correspond to the two insertion slots 12 and the two ear plates 5 correspond to the two rotation limiting grooves 13 one by one.

[0047] After the stationary ring 9 is installed, the technician rotates the positioning rod 31 to make the ear plate 5 rotate within the rotation limiting groove 13 until the two ear plates 5 are in positions corresponding to the two insertion slots 12. Then, the technician withdraws the positioning rod 31 from the rotation slot 11 to separate the ear plate 5 from the insertion slot 12. At the same time, the positioning rod 31 moves away from the placement plate 1. At this time, the two ear plates 5 are tightly abutted against the side of the pressing column 351 close to the opening end of the mounting cylinder 32. At the same time, the horizontal end face of the limiting block 41 close to the abutting block 33 is tightly abutted against the horizontal inner side wall of the limiting groove 42 close to the opening end of the mounting cylinder 32, making it difficult for the pressing column 351 to separate from the synchronous ring 341. This facilitates the technician to take out the positioning rod 31 together with the pressing column 351, the synchronous ring 341, and the mounting cylinder 32 from the pump body 8. At the same time, when disassembling the pump body 8 and the placement plate 1, it is not easy for the positioning rod 31 to collide with the stationary ring 9, reducing the risk of damaging the stationary ring 9. During the next installation, the technician first places the pump body 8 on the placement plate 1 and positions the pump body 8 so that the installation slot 84 on the pump body 8 is coaxial with the rotation slot 11. Then, the positioning rod 31 is installed on the placement plate 1, facilitating the next installation of the pump body 8 and the placement plate 1.

[0048] Further, to facilitate the technician to screw the anti-rotation pin 85 into the anti-rotation groove 91 so that the stationary ring 9 is not easily rotated within the installation slot 84, referring to Figure 1 and Figure 2 , a first marking line 6 is provided on the end face of the positioning rod 31 away from the placement plate 1. The first marking line 6 is arranged along the radial direction of the positioning rod 31. Second marking lines 7 are provided on both end faces of the mounting cylinder 32. The two second marking lines 7 correspond to each other and are both arranged along the radial direction of the mounting cylinder 32. When the stationary ring 9 is pressed into the installation slot 84, the first marking line 6 points to the anti-rotation pin hole 82 on the pump body 8, and the two second marking lines 7 both point to the anti-rotation groove 91 on the stationary ring 9 and correspond to the first marking line 6.

[0049] When installing the stationary ring 9, the technician places the stationary ring 9 into the installation cylinder 32, such that the stationary ring 9 is located between multiple abutting blocks 33. Then, the technician adjusts the stationary ring 9 so that the anti-rotation groove 91 of the stationary ring 9 corresponds to the second marking line 7 near the open end of the installation cylinder 32. Then, the technician rotates the synchronous ring 341 to make the stationary ring 9 coaxial with the installation cylinder 32. Then, the technician sleeves the pressing column 351 onto the positioning rod 31. Then, the technician places the installation cylinder 32 together with the stationary ring 9 and the pressing column 351 into the pump body 8 along the axis of the positioning rod 31, such that the end face of the open end of the installation cylinder 32 abuts against the inner bottom wall of the pump body 8. At the same time, the technician adjusts the installation cylinder 32 so that the second marking line 7 away from the open end of the installation cylinder 32 corresponds to the first marking line 6. Then, the technician rotates the fastening nut 353 to press the stationary ring 9 coaxially into the installation groove 84. At this time, the anti-rotation groove 91 and the anti-rotation pin hole 82 are in relative positions, facilitating the technician to screw the anti-rotation pin 85 into the anti-rotation pin hole 82, and inserting one end of the anti-rotation pin 85 into the anti-rotation groove 91, so that the stationary ring 9 is not prone to rotation in the installation groove 84.

[0050] The implementation principle of an assembly tooling for a water ring vacuum pump in an embodiment of the present application is as follows: during installation, the technician places the pump body 8 on the placement plate 1 and inserts the four positioning columns 21 into the installation screw holes 83. Then, the technician inserts the positioning rod 31 into the rotation groove 11, and at the same time inserts the ear plate 5 into the insertion groove 12 until the ear plate 5 is in a position opposite to the rotation limiting groove 13. Then, the technician rotates the positioning rod 31 to make the ear plate 5 rotate in the rotation limiting groove 13 until the ear plate 5 abuts against the side wall of the rotation limiting groove 13. Then, the technician installs the sealing ring 86 into the installation groove 84.

[0051] Immediately afterwards, the technician turns the open end of the installation cylinder 32 upwards and places the stationary ring 9 into the installation cylinder 32, such that the stationary ring 9 is located between multiple abutting blocks 33. Then, the technician adjusts the stationary ring 9 so that the anti-rotation groove 91 of the stationary ring 9 corresponds to the second marking line 7 near the open end of the installation cylinder 32. Then, the technician rotates the synchronous ring 341, and the synchronous ring 341 drives multiple abutting blocks 33 to slide synchronously towards the stationary ring 9 and clamp the stationary ring 9, achieving the coaxiality of the stationary ring 9 and the installation cylinder 32.

[0052] Then, the technician places the installation cylinder 32 together with the stationary ring 9 into the pump body 8, and makes the positioning rod 31 pass through the central hole 352, and places the installation cylinder 32 together with the stationary ring 9 and the pressing column 351 into the pump body 8 along the axis of the positioning rod 31. At the same time, the technician adjusts the installation cylinder 32 so that the second marking line 7 away from the open end of the installation cylinder 32 corresponds to the first marking line 6.

[0053] Then, the technician rotates the tightening nut 353, and gently presses against the guiding column 331 with a finger. The tightening nut 353 presses against the downward pressing column 351, and drives the downward pressing column 351 to press against the stationary ring 9 until the stationary ring 9 is coaxially pressed into the mounting groove 84. At this time, the guiding column 331 has a tendency to slide in the direction close to the axis of the mounting cylinder 32, which means that the stationary ring 9 is installed in place, and the technician can stop rotating the tightening nut 353. At this time, the anti-rotation groove 91 and the anti-rotation pin hole 82 are in relative positions.

[0054] After the installation of the stationary ring 9 is completed, the technician rotates the positioning rod 31 to align the ear plate 5 with the insertion slot 12, and then pulls out the positioning rod 31 to realize the disassembly of the positioning rod 31 from the placement plate 1. When the technician picks up the positioning rod 31, the downward pressing column 351, the synchronization ring 341 and the mounting cylinder 32 are taken out of the pump body 8 at the same time. Then, the technician separates the pump body 8 from the placement plate 1, and screws the anti-rotation pin 85 into the anti-rotation pin hole 82 so that one end of the anti-rotation pin 85 is inserted into the anti-rotation groove 91.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water ring vacuum pump assembly tool, characterized in that: The pump body (8) comprises a placement plate (1), a pump body (8) being mounted on the placement plate (1), an input hole (81), a stop pin hole (82) and a plurality of mounting screw holes (83) being provided on the pump body (8), a mounting groove (84) coaxial with the input hole (81) being provided on the inner bottom wall of the pump body (8), the mounting groove (84) being provided for mounting a stationary ring (9), a stop pin hole (82) being provided on the stationary ring (9), a positioning component (2) for positioning the pump body (8) being provided on the placement plate (1), and a centering component (3) for keeping the stationary ring (9) coaxial with the mounting groove (84); The centering assembly (3) comprises a positioning rod (31) disposed on the placement plate (1), the positioning rod (31) being coaxially arranged with the mounting groove (84), a mounting tube (32) being movably arranged on the positioning rod (31), the positioning rod (31) movably passing through the mounting tube (32) and being coaxially arranged with the mounting tube (32), one end of the mounting tube (32) being open, the open end of the mounting tube (32) being movably fitted with the inner bottom wall of the pump body (8), a plurality of abutting blocks (33) being slidably arranged in the mounting tube (32), the plurality of abutting blocks (33) being evenly spaced along the circumference direction of the mounting tube (32). The static ring (9) is evenly arranged, and is installed in the installation tube (32). The side of the clamping block (33) close to the axis of the installation tube (32) is movably pressed against the outer peripheral wall of the static ring (9). The multiple clamping blocks (33) are movably close to each other to clamp and fix the static ring (9). The cavity surrounded by the multiple clamping blocks (33) is always coaxial with the installation tube (32). The installation tube (32) is provided with a synchronization member (34) for synchronously adjusting the multiple clamping blocks (33). The installation tube (32) is also provided with a driving member (35) for driving the static ring (9) to be coaxial with the installation groove (84) and pressed into the installation groove (84).

2. The water ring vacuum pump assembly tool according to claim 1, characterized in that: The synchronizer (34) comprises a synchronizer ring (341) coaxially threadedly assembled on the inner circumferential wall of the mounting tube (32); the abutment block (33) is located on a side of the synchronizer ring (341) close to an open end of the mounting tube (32); the ends of the synchronizer ring (341) and the abutment block (33) close to each other are both sharp; the inclined side of the synchronizer ring (341) is movably abutted against the inclined side of the abutment block (33); and the end of the synchronizer ring (341) away from the sharp end protrudes from the mounting tube (32).

3. The water ring vacuum pump assembly tool according to claim 2, characterized in that: The driving member (35) comprises a lower pressure column (351) slidably arranged on the synchronization ring (341), the lower pressure column (351) slides along the axial direction of the synchronization ring (341), the synchronization ring (341) is provided with a limiting structure (4) for limiting the separation of the lower pressure column (351) from the synchronization ring (341), the lower pressure column (351) is movably pressed against the static ring (9) on one side close to the opening end of the installation tube (32), and the lower pressure column (351) is movably pressed against the static ring (9) on the other side. One end protrudes from the installation tube (32), a center hole (352) is opened on the axis of the lower pressure column (351), the positioning rod (31) is movably fitted with the inner wall of the center hole (352), the positioning rod (31) is coaxially provided with a locking nut (353), the locking nut (353) is threadably adapted to the positioning rod (31), and the locking nut (353) is movably locked to a side of the lower pressure column (351) away from the installation tube (32).

4. The water ring vacuum pump assembly tool according to claim 3, characterized in that: A guide column (331) is provided on a side of the pressing block (33) away from the axis of the mounting tube (32); a plurality of guide holes (321) corresponding to the plurality of guide columns (331) are provided on a side wall of the mounting tube (32); the guide columns (331) are slidably matched with the guide holes (321); the cross section of the guide columns (331) is polygonal, and the guide columns (331) are in contact with the inner walls of the guide holes (321); an end surface of the pressing block (33) close to the opening end of the mounting tube (32) is flush with the end surface of the opening end of the mounting tube (32); a reset member (332) is provided on a side of the pressing block (33) close to the guide column (331); the reset member (332) always causes the guide column (331) to slide in a direction away from the axis of the mounting tube (32); and the guide column (331) is always arranged to protrude from the outer peripheral wall of the mounting tube (32).

5. The water ring vacuum pump assembly tool according to claim 4, characterized in that: The placement plate (1) is provided with a rotation groove (11), one end of the positioning rod (31) is movably inserted into the rotation groove (11) and movably fits with the inner peripheral wall of the rotation groove (11), an ear plate (5) is provided at one end of the positioning rod (31) located in the rotation groove (11), a plug-in groove (12) is provided on a side of the placement plate (1) close to the positioning rod (31), the ear plate (5) is movably inserted into the plug-in groove (12), a rotation limiting groove (13) for the ear plate (5) to rotate is provided on a side wall of the plug-in groove (12), the ear plate (5) is movably pressed against the inner side wall of the rotation limiting groove (13), the plug-in groove (12) is provided along the axial direction of the positioning rod (31), and the rotation limiting groove (13) is provided along the circumference direction of the positioning rod (31).

6. The water ring vacuum pump assembly tool according to claim 5, characterized in that: A first marking line (6) is provided on the end surface of the positioning rod (31) away from the placement plate (1), and the first marking line (6) is arranged along the radial direction of the positioning rod (31). Second marking lines (7) are provided on both end surfaces of the mounting tube (32), and the two second marking lines (7) correspond to each other and are arranged along the radial direction of the mounting tube (32). When the stationary ring (9) is pressed into the mounting groove (84), the first marking line (6) points to the anti-rotation pin hole (82) on the pump body (8), and the two second marking lines (7) both point to the anti-rotation groove (91) on the stationary ring (9) and both correspond to the first marking line (6).

7. The water ring vacuum pump assembly tool according to claim 6, characterized in that: The positioning assembly (2) comprises a plurality of positioning columns (21) arranged on the placement plate (1), the plurality of positioning columns (21) corresponding to a plurality of mounting screw holes (83) one by one, and the positioning columns (21) are movably inserted into the mounting screw holes (83).

8. The water ring vacuum pump assembly tool according to claim 7, characterized in that: A buffer block (333) is provided on one side of the abutting block (33) close to the open end of the mounting tube (32), and a side of the buffer block (333) away from the abutting block (33) is flush with one side of the open end of the mounting tube (32).

Images