Welding tool for water ring vacuum pump impeller

Abstract

The utility model discloses a welding tool for an impeller of a water ring vacuum pump, relates to the technical field of water ring vacuum pumps, and aims to solve the problems that an elastic clamping plate provided in the background technology is easy to scratch the surface of a blade, the practicability is low, gas generated during welding is not subjected to adsorption treatment, the gas generated during welding drifts away in the external environment, and the welding quality is poor. According to the technical scheme, the device comprises a supporting table, and a supporting mechanism is arranged at the top of the supporting table; the supporting mechanism comprises a servo motor, a connecting shaft connected to the outer wall of the top end of an output shaft of the servo motor through a coupler, a supporting plate connected to the outer wall of the top end of the connecting shaft through a bolt, and a positioning column screwed to the outer wall of the top of the supporting plate. The blade clamping device can stably clamp a blade of an arc-shaped structure, meanwhile, the surface of the blade is prevented from being scratched, practicability is improved, gas generated in the welding process can be adsorbed and purified, peculiar smell gas is prevented from drifting in the external environment, and environment friendliness is improved.

Description

Technical Field

[0001] This utility model relates to the field of water ring vacuum pump technology, and in particular to a welding fixture for a water ring vacuum pump impeller. Background Technology

[0002] A water ring vacuum pump contains an eccentric rotor with fixed blades. It throws water (liquid) against the stator wall, forming a liquid ring concentric with the stator. The liquid ring and the rotor blades together constitute a variable volume rotary vacuum pump. During the production process of a water ring vacuum pump, the impeller of the water ring vacuum pump needs to be welded.

[0003] A search revealed a Chinese patent (application number "202022635077.X") disclosing a "welding fixture for water ring vacuum pump impeller blades." This welding fixture includes a base, four sets of support columns, a first fixed plate, a second fixed plate, a fixing device, a first clamping block, a rotating shaft, a second clamping block, two sets of connecting plates, two sets of fixing rods, two sets of elastic clamping plates, bolts, nuts, and a driving device. The bottom of the base is fixedly connected to the top of the support columns, the bottom of the first fixed plate is fixedly connected to the top of the base, the bottom of the second fixed plate is fixedly connected to the top of the base, the fixing device is mounted on the second fixed plate, the left end of the first clamping block is rotatably connected to the output end of the fixing device, the rotating shaft is rotatably mounted on the first fixed plate, and the left end of the rotating shaft is fixedly connected to the right end of the second clamping block. Two sets of connecting plates are respectively fixedly mounted on the top of the first clamping block and the top of the second clamping block. The top of the connecting plates is fixedly connected to the bottom of the fixing rods. However, the above welding fixture has the following problems during use:

[0004] 1. The blades to be welded are held together by elastic clamps that are close to each other. However, the elastic clamps are prone to scratching the blade surface, making them impractical.

[0005] 2. During the welding of the blades, the gases generated during welding were not adsorbed, causing the gases to drift into the external environment, resulting in poor environmental performance. Utility Model Content

[0006] This utility model provides a welding fixture for the impeller of a water ring vacuum pump, which solves the problems of the welding fixture proposed in the prior art, such as the elastic clamp plate easily scratching the blade surface, low practicality, and the lack of adsorption treatment for the gas generated during welding, resulting in the gas being dispersed into the external environment and poor environmental performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A welding fixture for a water ring vacuum pump impeller includes a support platform. A support mechanism is provided on the top of the support platform. The support mechanism includes a servo motor, a connecting shaft connected to the outer wall of the top end of the servo motor output shaft via a coupling, a support plate connected to the outer wall of the top end of the connecting shaft via bolts, and a positioning post screwed to the outer wall of the top end of the support plate. A fixing mechanism is provided on the support platform. The fixing mechanism includes a U-shaped mounting frame, a T-shaped top plate, a lifting cylinder bolted to the outer wall of the top end of the top plate, and a pressing block connected to the lower outer wall of the piston rod of the lifting cylinder via bearings. An adjustment mechanism is provided inside the support platform. The adjustment mechanism includes an adjustment motor, a screw, and a slider screwed to the outer wall of the screw. A clamping assembly is provided on the support platform. The clamping assembly includes a connecting plate fixed to the outer wall of the top end of the slider and four connecting posts respectively fixed to the outer wall of the top end of the connecting plate. The mounting frame comprises a rod, a mounting plate bolted to the outer wall of the top of four connecting rods, two mounting blocks respectively fixed to the outer wall of the top of the mounting plate, a double-ended screw connected to one side of the outer wall of the mounting block via bearings, two sliding plates respectively bolted to the outer walls of the two ends of the double-ended screws, a first clamping rod fixed to the outer wall of the top of one of the sliding plates, and two second clamping rods respectively fixed to the outer wall of the top of one of the sliding plates. A purification mechanism is provided on one side of the mounting frame. The purification mechanism includes a fixing plate bolted to the outer wall of the top of the support platform, a first fan bolted to the outer wall of one side of the fixing plate, a purification box bolted to the outer wall of one side of the mounting frame, an activated carbon filter element embedded in the lower part of the purification box, a top cover bolted to the outer wall of the top of the purification box, two second fans bolted to the outer wall of the top of the top cover, and an air guide hood bolted to the inner wall of one side of the mounting frame.

[0009] Preferably, a mounting bracket is fixed to the inner wall of the top of the support platform, and the servo motor is bolted to the outer wall of the bottom of the mounting bracket, with the bottom of the support plate abutting against the top of the support platform.

[0010] Preferably, the mounting frame is bolted to the upper outer wall of the support platform, and the top plate is bolted to the top outer wall of the mounting frame.

[0011] The above method involves placing the impeller base to be welded on the support plate, allowing the positioning pin to pass through the main shaft hole on the impeller base for positioning and support. Then, the piston rod of the lifting cylinder drives the extrusion block to descend, and the extrusion block extrudes the top of the impeller base. After the single blade is welded, the output shaft of the servo motor drives the connecting shaft, support plate, impeller base and extrusion block to rotate at a certain angle to achieve the welding of the next blade.

[0012] Preferably, the adjusting motor is bolted to the outer wall of one side of the support platform, and the screw is connected to the outer wall of one end of the output shaft of the adjusting motor via a coupling. One end of the screw is connected to the outer wall of one side of the mounting bracket via a bearing.

[0013] Preferably, two slide rails are opened on the top outer wall of the support platform, and four connecting rods are slidably installed in the two slide rails respectively. The mounting plate and the support platform form a sliding fit. One end of the bidirectional screw passes through and is connected to one side outer wall of the mounting block through a bearing. Two limiting rods are fixed on the outer walls of the two mounting blocks on opposite sides, and two sliding plates are slidably installed on the outer walls of the two limiting rods respectively.

[0014] The above scheme uses a bidirectional screw to drive two slide plates closer together, which in turn drives the first clamping rod and two second clamping rods closer together, thereby clamping and fixing the arc-shaped blade. Adjusting the motor output shaft drives the screw to rotate, which in turn drives the slider, connecting plate, mounting plate and blade to move, so that the blade moves closer to the impeller base.

[0015] Preferably, an air outlet is provided on the inner wall of the bottom of the purification box, and a connecting pipe is fixed on the inner wall of one side of the purification box. One end of the connecting pipe passes through and is fixed on the inner wall of one side of the mounting frame, and the other end of the connecting pipe is fixed on the inner wall of one side of the air guide hood.

[0016] The above scheme uses a first fan to blow the gas generated during welding into the air guide hood, while a second fan blows outside air into the purification chamber, causing air convection within the purification chamber. Under the action of pressure difference, the welding gas in the air guide hood enters the purification chamber, and the activated carbon filter element adsorbs and purifies the gas generated during welding.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The bidirectional screw drives the two slide plates to move closer together, which in turn drives the first clamping rod and the two second clamping rods to move closer together, thereby clamping and fixing the arc-shaped blade. Adjusting the motor output shaft drives the screw to rotate, which in turn drives the slider, connecting plate, mounting plate and blade to move, so that the blade is close to the impeller base, which can stably clamp the arc-shaped blade, while preventing the blade surface from being scratched, thus improving practicality.

[0019] 2. The first fan blows the gas generated during welding into the air guide hood, while the second fan blows outside air into the purification chamber, causing air convection within the purification chamber. Under the action of pressure difference, the welding gas in the air guide hood enters the purification chamber. The activated carbon filter element adsorbs and purifies the gas generated during welding, preventing odorous gases from drifting into the outside environment and improving environmental protection.

[0020] In summary, this invention can stably clamp the curved blades while preventing scratches on the blade surface, thus improving its practicality. It can also adsorb and purify the gases generated during welding, preventing odorous gases from dispersing into the external environment, thereby improving its environmental friendliness. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a welding fixture for a water ring vacuum pump impeller proposed in this utility model.

[0022] Figure 2 This is a schematic cross-sectional view of the welding fixture for a water ring vacuum pump impeller proposed in this utility model.

[0023] Figure 3 This is a cross-sectional structural diagram of a support mechanism for a welding fixture used in a water ring vacuum pump impeller, as proposed in this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of a fixing mechanism for a welding fixture used in a water ring vacuum pump impeller, as proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the adjustment mechanism of a welding fixture for a water ring vacuum pump impeller proposed in this utility model.

[0026] Figure 6 This is a schematic diagram of the clamping assembly structure of a welding fixture for a water ring vacuum pump impeller proposed in this utility model.

[0027] Figure 7 This is a cross-sectional structural diagram of a purification mechanism for a welding fixture used in a water ring vacuum pump impeller, as proposed in this utility model.

[0028] In the diagram: 1. Support platform; 2. Support mechanism; 201. Mounting bracket; 202. Servo motor; 203. Connecting shaft; 204. Support plate; 205. Positioning column; 3. Fixing mechanism; 301. Mounting frame; 302. Top plate; 303. Lifting cylinder; 304. Extrusion block; 4. Adjustment mechanism; 401. Adjustment motor; 402. Screw; 403. Slider; 5. Clamping assembly; 501. Connecting plate; 502. Connecting rod; 503. Mounting plate; 504. Mounting block; 505. Bidirectional screw; 506. Slide plate; 507. Limiting rod; 508. First clamping rod; 509. Second clamping rod; 6. Purification mechanism; 601. Fixing plate; 602. First fan; 603. Purification box; 604. Activated carbon filter element; 605. Top cover; 606. Second fan; 607. Connecting pipe; 608. Air guide hood. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Example 1, referring to Figure 1-4 A welding fixture for a water ring vacuum pump impeller includes a support platform 1, a support mechanism 2 on the top of the support platform 1, the support mechanism 2 including a servo motor 202, a connecting shaft 203 connected to the outer wall of the top end of the output shaft of the servo motor 202 via a coupling, a support plate 204 bolted to the outer wall of the top end of the connecting shaft 203, and a positioning post 205 screwed to the outer wall of the top end of the support plate 204. A mounting bracket 201 is fixed to the inner wall of the top of the support platform 1, and the servo motor 202 is bolted to the outer wall of the bottom of the mounting bracket 201. The bottom of the support plate 204 abuts against... The positioning column 205 is replaced according to the diameter of the main shaft hole of the impeller base to be welded. The support platform 1 is equipped with a fixing mechanism 3, which includes a "U"-shaped mounting frame 301, a "T"-shaped top plate 302, a lifting cylinder 303 connected to the top outer wall of the top plate 302 by bolts, and a pressing block 304 connected to the lower outer wall of the piston rod of the lifting cylinder 303 by bearings. The mounting frame 301 is connected to the upper outer wall of the support platform 1 by bolts, and the top plate 302 is connected to the top outer wall of the mounting frame 301 by bolts.

[0031] Example 2, refer to Figure 5-6 A welding fixture for a water ring vacuum pump impeller further includes an adjustment mechanism 4. The adjustment mechanism 4 includes an adjustment motor 401, a screw 402, and a slider 403 screwed to the outer wall of the screw 402. The adjustment motor 401 is bolted to the outer wall of one side of the support platform 1. The screw 402 is connected to the outer wall of one end of the output shaft of the adjustment motor 401 via a coupling. One end of the screw 402 is connected to the outer wall of one side of the mounting bracket 201 via a bearing. The support platform 1 is provided with a clamping assembly 5. The clamping assembly 5 includes a connecting plate 501 fixed to the top outer wall of the slider 403, four connecting rods 502 respectively fixed to the top outer wall of the connecting plate 501, mounting plates 503 bolted to the top outer walls of the four connecting rods 502, and two mounting plates 503 respectively fixed to the top outer walls of the mounting plates 503. The support platform 1 has a mounting block 504, a bidirectional screw 505 connected to one side of the outer wall of the mounting block 504 via a bearing, two slide plates 506 respectively screwed to the outer walls of both ends of the bidirectional screw 505, a first clamping rod 508 fixed to the top outer wall of one of the slide plates 506, and two second clamping rods 509 respectively fixed to the top outer wall of one of the slide plates 506. The top outer wall of the support platform 1 has two slide rails, and four connecting rods 502 are slidably installed in the two slide rails. The mounting plate 503 forms a sliding fit with the support platform 1. One end of the bidirectional screw 505 passes through and is connected to one side of the outer wall of the mounting block 504 via a bearing. Two limiting rods 507 are fixed on the outer walls of the two mounting blocks 504 on opposite sides. The two slide plates 506 are slidably installed on the outer walls of the two limiting rods 507 respectively.

[0032] Example 3, referring to Figure 7A welding fixture for a water ring vacuum pump impeller also includes a purification mechanism 6. The purification mechanism 6 includes a fixing plate 601 bolted to the top outer wall of the support platform 1, a first fan 602 bolted to one side outer wall of the fixing plate 601, a purification box 603 bolted to one side outer wall of the mounting frame 301, an activated carbon filter element 604 embedded in the lower part of the purification box 603, a top cover 605 bolted to the top outer wall of the purification box 603, two second fans 606 bolted to the top outer wall of the top cover 605, and an air guide hood 608 bolted to one side inner wall of the mounting frame 301. An air outlet is opened on the bottom inner wall of the purification box 603. A connecting pipe 607 is fixed on one side inner wall of the purification box 603. One end of the connecting pipe 607 passes through and is fixed to one side inner wall of the mounting frame 301, and the other end of the connecting pipe 607 is fixed to one side inner wall of the air guide hood 608.

[0033] Working principle: The impeller base to be welded is placed on the support plate 204, so that the positioning pin 205 passes through the main shaft hole on the impeller base to position and support the impeller base. Then, the piston rod of the lifting cylinder 303 drives the extrusion block 304 to descend, and the extrusion block 304 extrudes the top of the impeller base. The bidirectional screw 505 drives the two sliding plates 506 to move closer together, and drives the first clamping rod 508 and the two second clamping rods 509 to move closer together, thereby clamping and fixing the arc-shaped blade. The output shaft of the adjusting motor 401 drives the screw 402 to rotate, which in turn drives the slider 403, the connecting plate 501, and the mounting plate 50 3. The blades move closer to the impeller base. After a single blade is welded, the output shaft of the servo motor 202 drives the connecting shaft 203, support plate 204, impeller base and extrusion block 304 to rotate at a certain angle to realize the welding of the next blade. The first fan 602 blows the gas generated during welding into the air guide 608, while the second fan 606 blows the outside air into the purification box 603, so that the air in the purification box 603 forms convection. Under the action of pressure difference, the welding gas in the air guide 608 enters the purification box 603. The activated carbon filter 604 adsorbs and purifies the gas generated during welding.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for a water ring vacuum pump impeller, comprising a support platform (1), characterized in that, The support platform (1) is provided with a support mechanism (2) on top. The support mechanism (2) includes a servo motor (202), a connecting shaft (203) connected to the outer wall of the top end of the output shaft of the servo motor (202) via a coupling, a support plate (204) connected to the outer wall of the top end of the connecting shaft (203) via bolts, and a positioning column (205) screwed to the outer wall of the top end of the support plate (204). The support platform (1) is provided with a fixing mechanism (3), which includes a "U"-shaped mounting frame (301), a "T"-shaped top plate (302), a lifting cylinder (303) connected to the top outer wall of the top plate (302) by bolts, and an extrusion block (304) connected to the lower outer wall of the piston rod of the lifting cylinder (303) by bearings. The support platform (1) is provided with an adjustment mechanism (4), which includes an adjustment motor (401), a screw (402) and a slider (403) screwed to the outer wall of the screw (402); The support platform (1) is provided with a clamping assembly (5). The clamping assembly (5) includes a connecting plate (501) fixed on the top outer wall of the slider (403), four connecting rods (502) respectively fixed on the top outer wall of the connecting plate (501), a mounting plate (503) connected to the top outer wall of the four connecting rods (502) by bolts, two mounting blocks (504) respectively fixed on the top outer wall of the mounting plate (503), a bidirectional screw (505) connected to one side outer wall of the mounting block (504) by bearings, two sliding plates (506) respectively screwed to the outer walls of both ends of the bidirectional screw (505), a first clamping rod (508) fixed on the top outer wall of one of the sliding plates (506), and two second clamping rods (509) respectively fixed on the top outer wall of one of the sliding plates (506). A purification mechanism (6) is provided on one side of the mounting frame (301). The purification mechanism (6) includes a fixing plate (601) bolted to the top outer wall of the support platform (1), a first fan (602) bolted to the outer wall of one side of the fixing plate (601), a purification box (603) bolted to the outer wall of one side of the mounting frame (301), an activated carbon filter element (604) embedded in the lower part of the purification box (603), a top cover (605) bolted to the top outer wall of the purification box (603), two second fans (606) bolted to the top outer wall of the top cover (605) respectively, and an air guide cover (608) bolted to the inner wall of one side of the mounting frame (301).

2. The welding fixture for a water ring vacuum pump impeller according to claim 1, characterized in that, The support platform (1) is fixedly provided with a mounting bracket (201) on the inner wall of the top, and the servo motor (202) is connected to the outer wall of the bottom of the mounting bracket (201) by bolts, and the bottom of the support plate (204) abuts against the top of the support platform (1).

3. The welding fixture for a water ring vacuum pump impeller according to claim 1, characterized in that, The mounting frame (301) is bolted to the upper outer wall of the support platform (1), and the top plate (302) is bolted to the top outer wall of the mounting frame (301).

4. The welding fixture for a water ring vacuum pump impeller according to claim 2, characterized in that, The regulating motor (401) is bolted to the outer wall of one side of the support platform (1), and the screw (402) is connected to the outer wall of one end of the output shaft of the regulating motor (401) through a coupling. One end of the screw (402) is connected to the outer wall of one side of the mounting bracket (201) through a bearing.

5. The welding fixture for a water ring vacuum pump impeller according to claim 1, characterized in that, Two slide rails are opened on the top outer wall of the support platform (1), and four connecting rods (502) are slidably installed in the two slide rails respectively. The mounting plate (503) forms a sliding fit with the support platform (1). One end of the bidirectional screw (505) passes through and is connected to the outer wall of one side of the mounting block (504) through a bearing. Two limiting rods (507) are fixed on the outer wall of the two mounting blocks (504) on opposite sides, and two sliding plates (506) are slidably installed on the outer wall of the two limiting rods (507) respectively.

6. The welding fixture for a water ring vacuum pump impeller according to claim 1, characterized in that, An air outlet is provided on the bottom inner wall of the purification box (603), and a connecting pipe (607) is fixed on one side inner wall of the purification box (603). One end of the connecting pipe (607) passes through and is fixed on one side inner wall of the mounting frame (301), and the other end of the connecting pipe (607) is fixed on one side inner wall of the air guide hood (608).

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