Internal and external galvanizing equipment for special pressure container

Abstract

The invention discloses internal and external galvanization equipment for a special pressure vessel, and belongs to the technical field of pressure vessel galvanization, the internal and external galvanization equipment for the special pressure vessel comprises a placing mechanism for galvanization of the pressure vessel, the placing mechanism comprises a bottom plate and a lifting frame, and six connecting rods are fixedly mounted on the lifting frame; each connecting rod is provided with two taking and placing mechanisms used for clamping the pressure container to be galvanized. According to the invention, through the arrangement of the multi-station synchronous operation putting-in mechanism, the automatic lifting, translation and descending of the pressure container are realized, so that the galvanizing, unloading and loading processes are continuously carried out, and the production efficiency is greatly improved; according to the pick-and-place mechanism, through alternate driving of a driving triangular wheel and a driven triangular wheel, supporting points of a clamping rod are switched in a staged mode in the galvanization process, it is guaranteed that connecting lugs of a pressure container are not fixedly shielded, and galvanization blind areas are avoided; through cooperation of the compression spring and the lower friction ring, the passive triangular wheel is kept fixed in a non-driving state, and accidental rotation is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure vessel galvanizing, in particular to internal and external galvanizing equipment for special pressure vessels. Background Art

[0002] Special pressure vessels are important industrial equipment and are widely used in the petrochemical, energy, and military industries. Their performance and quality are directly related to production safety and equipment life. In order to improve the corrosion resistance and service life of pressure vessels, it is usually necessary to galvanize their internal and external surfaces. Traditional galvanizing processes mostly use manual operation or simple mechanical assistance, which has the following technical defects: Traditional galvanizing equipment can usually only process a single pressure vessel at a time, and the loading and unloading process relies on manual operation, making it difficult to achieve continuous production, resulting in low production efficiency and an inability to meet the needs of large-scale processing. Existing clamping mechanisms mostly adopt a fixed design, and the clamping position cannot be adjusted during the galvanizing process, resulting in a galvanizing blind spot at the contact point between the pressure vessel and the clamp, requiring a second re-plating, increasing the complexity of the process. Traditional equipment lacks a coordinated motion mechanism, and the transfer, immersion plating, and loading and unloading of the pressure vessel must be carried out step by step. The operation process is cumbersome and there is a risk of cross-contamination of the plating solution. To solve the above problems, it is urgent to develop a new type of internal and external galvanizing equipment that can realize automated and continuous galvanizing of pressure vessels. At the same time, by optimizing the dynamic adjustment capability of the clamping mechanism, it can ensure full coverage of the coating and improve production efficiency and process stability. Summary of the Invention

[0003] In response to the above technical problems, the technical solution adopted by the present invention is: a special internal and external galvanizing equipment for pressure vessels, including a placement mechanism for galvanizing the pressure vessels, the placement mechanism including a base plate and a lifting frame, six connecting rods are fixedly installed on the lifting frame, and each connecting rod is provided with two picking and placing mechanisms for clamping the pressure vessel to be galvanized.

[0004] Furthermore, the placing mechanism includes a galvanizing pool and an upper box fixedly mounted on the bottom plate, a top motor fixedly mounted on the upper box, track plates fixedly mounted on both sides of the upper box, a rotating large gear rotatably mounted on the track plate, a slide groove is provided on the rotating large gear, and the top motor drives the rotating large gear to rotate through gear transmission.

[0005] Furthermore, a transverse guide rail is fixedly mounted on the bottom plate, a transverse block is slidably mounted on the transverse guide rail, the lifting frame is slidably mounted on the transverse block, a sliding rod is fixedly mounted on the transverse block, and the sliding rod slides in the sliding groove.

[0006] Furthermore, the track pad is provided with a left vertical groove, a horizontal groove and a right vertical groove, and the slide bar slides in the left vertical groove, the horizontal groove and the right vertical groove.

[0007] The top motor rotates and drives the large gear to rotate through the gear transmission. The large gear drives the slide rod to rise along the right vertical groove through the slide rod. At this time, the lifting frame and the connecting rod are driven to rise through the slide rod, and the pressure vessel originally immersed in the galvanizing pool is lifted. Then the slide rod enters the horizontal groove and moves along the horizontal groove to the upper part of the left vertical groove. At this time, the cross block slides along the cross guide rail. At this time, the galvanized pressure vessel reaches the bottom plate, and the next group of pressure vessels to be galvanized arrives above the galvanizing pool. Then the slide rod descends along the left vertical groove and puts the pressure vessel to be galvanized into the galvanizing pool for galvanizing. At this time, the galvanized pressure vessel is taken away and the next batch of pressure vessels to be galvanized are placed on the pick-and-place mechanism. Then the slide rod rises along the left vertical groove and enters the right vertical groove through the horizontal groove. This reciprocating process realizes the synchronous galvanizing of multiple pressure vessels. During galvanizing, the previous batch of galvanized pressure vessels are removed and the next batch of pressure vessels to be galvanized are placed on the pick-and-place mechanism.

[0008] Furthermore, the picking and placing mechanism includes a column fixedly mounted on the connecting rod, a connecting cylinder rotatably mounted on the column, an active triangular wheel fixedly mounted on the connecting cylinder, a rotating motor fixedly mounted on the column, a driving gear fixedly mounted on the motor shaft of the rotating motor, a center gear fixedly mounted on the connecting cylinder, and the center gear meshes with the driving gear.

[0009] Furthermore, a clamping frame is fixedly installed at the bottom of the column, six clamping rods are slidably installed on the clamping frame, a support rod is fixedly installed on the clamping rod, a push column is fixedly installed on the clamping rod, an opening spring is provided between the clamping rod and the clamping frame, and six groups of connecting ears are provided on the pressure vessel. When the pick-up and placement mechanism clamps the pressure vessel, the support rod is located below the connecting ear.

[0010] Furthermore, an inner column is rotatably installed in the connecting cylinder, a passive triangular wheel is fixedly installed below the inner column, three push blocks are fixedly installed on the inner column, three wheel sliding grooves are provided in the active triangular wheel, the push blocks slide in the wheel sliding grooves, and the active triangular wheel and the passive triangular wheel are in contact with the six push columns respectively.

[0011] When clamping the pressure vessel, first place the pressure vessel between the six supporting rods. At this time, the active triangular wheel pushes out the three push columns and the clamping rod, and the passive triangular wheel pushes out the three push columns and the clamping rod. The six opening springs are stretched, and the rotation of the motor drives the driving gear to rotate, and the connecting cylinder and the active triangular wheel are driven to rotate clockwise through the center gear. When the active triangular wheel rotates one-sixth of a circle, the outer contours of the active triangular wheel and the passive triangular wheel coincide. At this time, the three clamping rods and the push columns that were originally held apart by the active triangular wheel move inward under the rebound of the opening springs. The supporting rod reaches under the connecting ear to clamp the pressure vessel. At this time, the edge of the wheel slide groove contacts the push block. At this time, the pressure vessel is placed in the galvanizing pool by lifting the lifting frame. The rod is located below the connecting ear, and there is a blind spot in the galvanizing. Then the active triangular wheel continues to rotate clockwise, and the active triangular wheel drives the passive triangular wheel to rotate synchronously by one-sixth of a circle. As the active triangular wheel and the passive triangular wheel rotate synchronously, the clamping rod and the push column next to the clamping rod and the push column that were originally pushed open will be lifted up. The clamping rod and the push column that were originally lifted up will rebound under the reset of the opening spring, so that the three support rods support the three galvanized connecting ears to ensure that there are no blind spots in the galvanizing of the pressure vessel. When the galvanized pressure vessel needs to be removed, the active triangular wheel rotates counterclockwise, the passive triangular wheel does not move, the push block slides in the wheel slide groove, and the active triangular wheel pushes out the other three push columns and clamping rods that have not been lifted up by the passive triangular wheel, thereby releasing the clamping of the pressure vessel.

[0012] Furthermore, the picking and placing mechanism also includes a sliding ring slidably mounted on the column, a compression spring is arranged between the sliding ring and the connecting tube, a plurality of balls are arranged under the sliding ring, the top of the inner column contacts the balls under the sliding ring, and a lower friction ring is fixedly mounted on the clamping frame, and the lower friction ring contacts the bottom of the passive triangular wheel.

[0013] The compression spring presses the sliding ring onto the inner column and presses the passive triangular wheel onto the lower friction ring, so that the passive triangular wheel and the push block will not rotate autonomously when not pushed by the active triangular wheel.

[0014] Compared with the prior art, the present invention has the following advantages: (1) The present invention realizes automatic lifting, translation and lowering of the pressure vessel by setting a multi-station synchronously operated placing mechanism and utilizing the coordinated movement of the lifting frame, the cross guide rail and the slide rod, so that the galvanizing, unloading and loading processes can be carried out continuously, thereby greatly improving production efficiency; (2) The present invention adopts a dynamically adjustable pick-and-place mechanism, and through the alternating drive of the active triangular wheel and the passive triangular wheel, the clamping rod switches the support point in stages during the galvanizing process, ensuring that the connecting ear of the pressure vessel has no fixed obstruction and avoiding the galvanizing blind area; (3) The present invention utilizes the cooperation of the compression spring and the lower friction ring to keep the passive triangular wheel fixed in the non-driven state to prevent accidental rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 The present invention is put into the mechanism structure diagram Figure 1 .

[0017] Figure 3 The present invention is put into the mechanism structure diagram Figure 2 .

[0018] Figure 4 Schematic diagram of the pick-and-place mechanism structure of the present invention Figure 1 .

[0019] Figure 5 This is a schematic diagram of the pick-and-place mechanism structure of the present invention (clamping state).

[0020] Figure 6 for Figure 5 A local enlarged schematic diagram of point A in the middle.

[0021] Figure 7 This is a schematic diagram of the pick-and-place mechanism structure of the present invention (released state).

[0022] Figure 8 Schematic diagram of the pick-and-place mechanism structure of the present invention Figure 2 .

[0023] Figure 9 Schematic diagram of the pick-and-place mechanism structure of the present invention Figure 3 .

[0024] Figure 10 Schematic diagram of the pick-and-place mechanism structure of the present invention Figure 4 .

[0025] Figure 11 Schematic diagram of the pick-and-place mechanism structure of the present invention Figure 5 .

[0026] Reference numerals: 101-bottom plate; 102-galvanizing tank; 103-upper box; 104-top motor; 105-rotating gear; 106-slide; 107-track plate; 1071-left vertical slot; 1072-horizontal slot; 1073-right vertical slot; 108-slide bar; 109-horizontal guide rail; 110-horizontal block; 111-lifting frame; 112-connecting rod; 201-column; 202-rotating motor; 20 3-driving gear; 204-connecting cylinder; 205-center gear; 206-active triangular wheel; 2061-wheel slide groove; 207-clamping frame; 208-clamping rod; 209-support rod; 210-opening spring; 211-passive triangular wheel; 212-inner column; 213-push block; 214-push column; 301-sliding ring; 302-compression spring; 303-lower friction ring; 4-pressure vessel; 5-connecting ear. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] Example: Reference Figures 1-11 A special internal and external galvanizing equipment for pressure vessels includes a placement mechanism for galvanizing the pressure vessel 4. The placement mechanism includes a base plate 101 and a lifting frame 111. Six connecting rods 112 are fixedly installed on the lifting frame 111. Each connecting rod 112 is provided with two picking and placing mechanisms for clamping the pressure vessel 4 to be galvanized.

[0029] like Figure 2 、 Figure 3 As shown, the loading mechanism includes a galvanizing pool 102 and an upper box 103 fixedly mounted on the bottom plate 101, a top motor 104 fixedly mounted on the upper box 103, track plates 107 fixedly mounted on both sides of the upper box 103, a rotating large gear 105 rotatably mounted on the track plate 107, a slide groove 106 is provided on the rotating large gear 105, and the top motor 104 drives the rotating large gear 105 to rotate through gear transmission.

[0030] like Figure 2 、 Figure 3 As shown, a transverse guide rail 109 is fixedly mounted on the bottom plate 101 , a transverse block 110 is slidably mounted on the transverse guide rail 109 , a lifting frame 111 is slidably mounted on the transverse block 110 , a slide rod 108 is fixedly mounted on the transverse block 110 , and the slide rod 108 slides in the slide groove 106 .

[0031] like Figure 2 、 Figure 3 As shown, the track pad 107 is provided with a left vertical groove 1071 , a horizontal groove 1072 and a right vertical groove 1073 , and the slide bar 108 slides in the left vertical groove 1071 , the horizontal groove 1072 and the right vertical groove 1073 .

[0032] The top motor 104 rotates and drives the large gear 105 to rotate through the gear transmission. The large gear 105 drives the slide bar 108 to rise along the right vertical groove 1073 through the slide 106. At this time, the lift frame 111 and the connecting rod 112 are driven to rise by the slide bar 108, and the pressure vessel 4 originally immersed in the galvanizing pool 102 is lifted. Then the slide bar 108 enters the horizontal groove 1072 and moves along the horizontal groove 1072 to the upper part of the left vertical groove 1071. At this time, the horizontal block 110 slides along the horizontal guide rail 109. At this time, the galvanized pressure vessel 4 reaches the bottom plate 101, and the next group of pressure vessels to be galvanized are The container 4 reaches the top of the galvanizing pool 102, and then the slide bar 108 descends along the left vertical groove 1071, and the pressure vessel 4 to be galvanized is placed into the galvanizing pool 102 for galvanizing. At this time, the galvanized pressure vessel 4 is taken away, and the next batch of pressure vessels 4 to be galvanized are placed on the pick-up and placement mechanism. Then the slide bar 108 rises along the left vertical groove 1071, passes through the horizontal groove 1072 and enters the right vertical groove 1073, and repeats this process to achieve synchronous galvanizing of multiple pressure vessels 4. During galvanizing, the previous batch of galvanized pressure vessels 4 are removed, and the next batch of pressure vessels 4 to be galvanized are placed on the pick-up and placement mechanism.

[0033] like Figure 4-11 As shown, the pick-and-place mechanism includes a column 201 fixedly mounted on the connecting rod 112, a connecting cylinder 204 is rotatably mounted on the column 201, an active triangular wheel 206 is fixedly mounted on the connecting cylinder 204, a rotating motor 202 is fixedly mounted on the column 201, a driving gear 203 is fixedly mounted on the motor shaft of the rotating motor 202, a center gear 205 is fixedly mounted on the connecting cylinder 204, and the center gear 205 is meshed with the driving gear 203.

[0034] like Figure 4-11 As shown, a clamping frame 207 is fixedly installed at the bottom of the column 201, six clamping rods 208 are slidably installed on the clamping frame 207, a supporting rod 209 is fixedly installed on the clamping rod 208, a pushing column 214 is fixedly installed on the clamping rod 208, an opening spring 210 is provided between the clamping rod 208 and the clamping frame 207, six groups of connecting ears 5 are provided on the pressure vessel 4, and when the pick-up and placement mechanism clamps the pressure vessel 4, the supporting rod 209 is located below the connecting ear 5.

[0035] like Figure 4-11 As shown, an inner column 212 is rotatably installed in the connecting cylinder 204, a passive triangular wheel 211 is fixedly installed below the inner column 212, three push blocks 213 are fixedly installed on the inner column 212, three wheel sliding grooves 2061 are provided in the active triangular wheel 206, the push blocks 213 slide in the wheel sliding grooves 2061, and the active triangular wheel 206 and the passive triangular wheel 211 are in contact with six push columns 214 respectively.

[0036] When clamping the pressure vessel 4, first place the pressure vessel 4 between the six supporting rods 209. At this time, the active triangular wheel 206 pushes out the three push columns 214 and the clamping rod 208, and the passive triangular wheel 211 pushes out the three push columns 214 and the clamping rod 208. The six opening springs 210 are stretched, and the rotating motor 202 rotates to drive the driving gear 203 to rotate, and the central gear 205 drives the connecting cylinder 204 and the active triangular wheel 206 to rotate clockwise. After the wheel 206 rotates one-sixth of a circle, the outer contours of the active triangular wheel 206 and the passive triangular wheel 211 coincide with each other. At this time, the three clamping rods 208 and the push column 214, which were originally held open by the active triangular wheel 206, move inward under the rebound of the opening spring 210. The support rod 209 reaches under the connecting ear 5 and clamps the pressure vessel 4. At this time, the edge of the wheel sliding groove 2061 contacts the push block 213. At this time, the pressure vessel 4 is placed into the galvanizing tank 102 by lifting the lifting frame 111. There are three supporting rods 209 located below the connecting ear 5, and there is a blind spot in the galvanized state. Then the active triangular wheel 206 continues to rotate clockwise, and the active triangular wheel 206 drives the passive triangular wheel 211 to rotate synchronously by one-sixth of a circle. As the active triangular wheel 206 and the passive triangular wheel 211 rotate synchronously, the clamping rod 208 and the pushing column 214 that were originally pushed open are lifted up. The clamping rod 208 and the pushing column 214 that were originally lifted up are lifted up when the spring 210 is opened. The reset rebounds so that the three supporting rods 209 support the three galvanized connecting ears 5 to ensure that there are no blind spots in the galvanizing of the pressure vessel 4. When the galvanized pressure vessel 4 needs to be removed, the active triangular wheel 206 rotates counterclockwise, the passive triangular wheel 211 does not move, the push block 213 slides in the wheel sliding groove 2061, and the active triangular wheel 206 pushes out the other three pushing columns 214 and the clamping rod 208 that are not lifted by the passive triangular wheel 211, thereby releasing the clamping of the pressure vessel 4.

[0037] like Figure 4-11 As shown, the pick-and-place mechanism also includes a sliding ring 301 slidably mounted on the column 201, a compression spring 302 is provided between the sliding ring 301 and the connecting tube 204, a plurality of balls are provided below the sliding ring 301, the top of the inner column 212 contacts the balls below the sliding ring 301, and a lower friction ring 303 is fixedly mounted on the clamping frame 207, and the lower friction ring 303 contacts the bottom of the passive triangular wheel 211.

[0038] like Figure 4-11 As shown, the compression spring 302 presses the sliding ring 301 onto the inner column 212 and presses the passive triangular wheel 211 onto the lower friction ring 303, so that the passive triangular wheel 211 and the push block 213 will not rotate autonomously when not pushed by the active triangular wheel 206.

[0039] The working principle of the special internal and external galvanizing equipment for pressure vessels disclosed in the present invention is as follows: the top motor 104 rotates and drives the rotating large gear 105 to rotate through the gear transmission, and the rotating large gear 105 drives the slide bar 108 to rise along the right vertical groove 1073 through the slide groove 106. At this time, the slide bar 108 drives the lifting frame 111 and the connecting rod 112 to rise, and the pressure vessel 4 originally immersed in the galvanizing pool 102 is lifted. Then the slide bar 108 enters the horizontal groove 1072 and moves along the horizontal groove 1072 to the upper part of the left vertical groove 1071. At this time, the horizontal block 110 slides along the horizontal guide rail 109, and the galvanized pressure vessel 4 reaches the bottom plate. 101, the next group of pressure vessels 4 to be galvanized arrives above the galvanizing pool 102, and then the slide bar 108 descends along the left vertical groove 1071, and the pressure vessels 4 to be galvanized are placed into the galvanizing pool 102 for galvanizing. At this time, the galvanized pressure vessels 4 are taken away, and the next batch of pressure vessels 4 to be galvanized are placed on the pick-and-place mechanism, and then the slide bar 108 rises along the left vertical groove 1071, passes through the horizontal groove 1072 and enters the right vertical groove 1073, and repeats this process to achieve synchronous galvanizing of multiple pressure vessels 4. During galvanizing, the previous batch of galvanized pressure vessels 4 are taken away, and the next batch of pressure vessels 4 to be galvanized are placed on the pick-and-place mechanism.When clamping the pressure vessel 4, first place the pressure vessel 4 between the six supporting rods 209. At this time, the active triangular wheel 206 pushes out the three push columns 214 and the clamping rod 208, and the passive triangular wheel 211 pushes out the three push columns 214 and the clamping rod 208. The six opening springs 210 are stretched, and the rotating motor 202 rotates to drive the driving gear 203 to rotate, and the central gear 205 drives the connecting tube 204 and the active triangular wheel 206 to rotate clockwise. When the active triangular wheel 206 rotates one-sixth of a circle, the active triangular wheel 206 and the active triangular wheel 206 are rotated. The outer contour of the passive triangular wheel 211 coincides. At this time, the three clamping rods 208 and the pushing column 214, which were originally held open by the active triangular wheel 206, move inward under the rebound of the opening spring 210. The supporting rod 209 reaches below the connecting ear 5 and clamps the pressure vessel 4. At this time, the edge of the wheel slide groove 2061 contacts the pushing block 213. At this time, the pressure vessel 4 is placed in the galvanizing pool 102 by lifting the lifting frame 111. Since there are three supporting rods 209 below the connecting ear 5, there is a blind spot for galvanizing. Then the active triangular wheel 206 continues to rotate clockwise. The triangular wheel 206 drives the passive triangular wheel 211 to rotate synchronously by one-sixth of a circle. As the active triangular wheel 206 and the passive triangular wheel 211 rotate synchronously, the clamping rod 208 and the pushing column 214 next to the clamping rod 208 and the pushing column 214 that were originally pushed open are lifted up. The clamping rod 208 and the pushing column 214 that were originally lifted up rebound under the reset of the opening spring 210, so that the three supporting rods 209 support the three galvanized connecting ears 5 to ensure that there is no blind spot in the galvanizing of the pressure vessel 4. When the galvanized pressure vessel 4 needs to be removed, the active triangular wheel 206 The angle wheel 206 rotates counterclockwise, and the compression spring 302 presses the sliding ring 301 onto the inner column 212, and presses the passive triangular wheel 211 onto the lower friction ring 303, so that the passive triangular wheel 211 and the push block 213 will not rotate autonomously when not pushed by the active triangular wheel 206. Therefore, the passive triangular wheel 211 does not move at this time, and the push block 213 slides in the wheel sliding groove 2061. The active triangular wheel 206 pushes out the other three push columns 214 and the clamping rod 208 that are not lifted by the passive triangular wheel 211, thereby releasing the clamping of the pressure vessel 4.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An internal and external galvanizing device for a special pressure vessel, comprising a placement mechanism for galvanizing a pressure vessel (4), characterized in that: The placing mechanism comprises a bottom plate (101) and a lifting frame (111), six connecting rods (112) are fixedly mounted on the lifting frame (111), and each connecting rod (112) is provided with two placing and picking mechanisms for clamping the pressure vessel (4) to be galvanized.

2. The internal and external galvanizing equipment for special pressure vessels according to claim 1, characterized in that: The placing mechanism comprises a galvanizing pool (102) and an upper box (103) fixedly mounted on a bottom plate (101); a top motor (104) is fixedly mounted on the upper box (103); track plates (107) are fixedly mounted on both sides of the upper box (103); a rotating large gear (105) is rotatably mounted on the track plate (107); a chute (106) is provided on the rotating large gear (105); and the top motor (104) drives the rotating large gear (105) to rotate through gear transmission.

3. The internal and external galvanizing equipment for special pressure vessels according to claim 2, characterized in that: A transverse guide rail (109) is fixedly mounted on the bottom plate (101), a transverse block (110) is slidably mounted on the transverse guide rail (109), a lifting frame (111) is slidably mounted on the transverse block (110), a slide rod (108) is fixedly mounted on the transverse block (110), and the slide rod (108) slides in the slide groove (106).

4. The internal and external galvanizing equipment for special pressure vessels according to claim 3, characterized in that: The track plate (107) is provided with a left vertical groove (1071), a horizontal groove (1072) and a right vertical groove (1073), and the slide bar (108) slides in the left vertical groove (1071), the horizontal groove (1072) and the right vertical groove (1073).

5. The internal and external galvanizing equipment for special pressure vessels according to claim 1, characterized in that: The pick-and-place mechanism comprises a column (201) fixedly mounted on a connecting rod (112), a connecting cylinder (204) rotatably mounted on the column (201), a driving triangular wheel (206) fixedly mounted on the connecting cylinder (204), a rotating motor (202) fixedly mounted on the column (201), a driving gear (203) fixedly mounted on the motor shaft of the rotating motor (202), a central gear (205) fixedly mounted on the connecting cylinder (204), and the central gear (205) meshing with the driving gear (203).

6. The internal and external galvanizing equipment for special pressure vessels according to claim 5, characterized in that: A clamping frame (207) is fixedly installed at the bottom of the column (201), six clamping rods (208) are slidably installed on the clamping frame (207), a supporting rod (209) is fixedly installed on the clamping rod (208), a pushing column (214) is fixedly installed on the clamping rod (208), an opening spring (210) is provided between the clamping rod (208) and the clamping frame (207), six groups of connecting ears (5) are provided on the pressure vessel (4), and when the pick-up and placement mechanism clamps the pressure vessel (4), the supporting rod (209) is located below the connecting ears (5).

7. The internal and external galvanizing equipment for special pressure vessels according to claim 6, characterized in that: An inner column (212) is rotatably mounted in the connecting cylinder (204), a passive triangular wheel (211) is fixedly mounted below the inner column (212), three push blocks (213) are fixedly mounted on the inner column (212), three wheel sliding grooves (2061) are provided in the active triangular wheel (206), the push blocks (213) slide in the wheel sliding grooves (2061), and the active triangular wheel (206) and the passive triangular wheel (211) are in contact with the six push columns (214) respectively.

8. The internal and external galvanizing equipment for special pressure vessels according to claim 7, characterized in that: The pick-and-place mechanism further includes a sliding ring (301) slidably mounted on the column (201), a compression spring (302) is provided between the sliding ring (301) and the connecting tube (204), a plurality of balls are provided below the sliding ring (301), the top of the inner column (212) contacts the balls below the sliding ring (301), a lower friction ring (303) is fixedly mounted on the clamping frame (207), and the lower friction ring (303) contacts the bottom of the passive triangular wheel (211).

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