Batch sand blasting tool for reactor tube nests

Abstract

The utility model discloses a batch sand blasting tool for reactor tube nests, which comprises a moving track, two supports, a telescopic rod, a support plate, a sand blasting gun and a sand blasting cabinet, the two supports are arranged in a vertically turning T shape, the two supports are symmetrically arranged below two ends of the moving track, the telescopic rod is arranged below the moving track in a sliding manner, and the support plate is arranged below the sand blasting gun. The supporting plate is fixedly arranged below the telescopic rod, the sand blasting guns are fixedly arranged on one side of the supporting plate, the multiple sand blasting guns are arranged, the sand blasting cabinet is arranged on one side of the support, the movable rolling wheels are arranged below the two ends of the support, the expansion air cylinders are arranged on one sides of the movable rolling wheels, and the expansion air cylinders penetrate through the bottom wall of the support. The utility model belongs to the technical field of sand blasting tools, and particularly provides a batch sand blasting tool for reactor tube nests, which has the advantages that one person can perform batch sand blasting and derusting operation, the efficiency is high, operators do not need to enter a reactor, the health threat to the number of the operators is reduced, an air cylinder is locked in a safety interlocking mode, and the safety risk is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sandblasting tools, in particular to a reactor tube batch sandblasting tool. Background Art

[0002] In order to achieve the rust removal effect, each tube of the existing ethylene oxide reactor needs to be sandblasted. The reactor has 6,000-12,000 tubes (depending on the size of the reactor). The current situation is that each person uses a sandblasting gun to sandblast one tube at a time, which is extremely inefficient.

[0003] The work inside the ethylene oxide reactor is a confined space. The more people enter, the higher the safety risk. Cross-operation between people will also pose a safety risk to the operators. For safety reasons, only 6 people can enter such confined spaces, and these 6 people will face a high-risk working environment. Once an accident occurs, it will be unimaginable.

[0004] Moreover, the working environment is harsh. A large amount of dust is generated during the reactor tube sandblasting operation, and long-term work poses a serious threat to the health of personnel. The existing equipment has no interlock control, and the risk of mechanical injury to construction personnel is also increased. If the operator is working in a fatigued or heavily dusty environment, the consequences of the sandblasting gun not being held firmly under the 7.0kg sandblasting pressure and spraying the person next to him will be disastrous. The labor cost is high, the efficiency is low, and the environmental risk is great. Utility Model Content

[0005] In order to solve the above-mentioned existing problems, the utility model provides a batch sandblasting and rust removal operation by one person, which is highly efficient and does not require the operator to enter the reactor, reducing the health threat to the number of operators. The cylinder locking safety interlock mode greatly reduces the safety risk of the reactor tube batch sandblasting tool.

[0006] The technical solution adopted by the utility model is as follows: the utility model is a reactor tube batch sandblasting tool, comprising a mobile track, a bracket, a telescopic rod, a support plate, a sandblasting gun and a sandblasting cabinet, the bracket is provided with two vertically flipped T-shaped settings, the two brackets are symmetrically arranged below the two ends of the mobile track, the telescopic rod is slidably arranged below the mobile track, the support plate is fixedly arranged below the telescopic rod, the sandblasting gun is fixedly arranged on one side of the support plate, several sandblasting guns are provided, the sandblasting cabinet is arranged on one side of the bracket, mobile rollers are arranged below the two ends of the bracket, an expansion cylinder is arranged on one side of the mobile roller, the expansion cylinder passes through the bottom wall of the bracket, a sandblasting pot and an air source are arranged in the sandblasting cabinet, and the sandblasting gun is connected to the sandblasting pot and the air source respectively.

[0007] Further, a sandblasting pipe is provided between the sandblasting gun and the sandblasting tank. Both ends of the sandblasting pipe are respectively connected to the sandblasting gun and the sandblasting tank, and a flow switch is provided between the sandblasting tank and the sandblasting pipe.

[0008] Further, an air pipe is provided between the sandblasting gun and the air source. Both ends of the air pipe are respectively connected to the sandblasting gun and the air source, and a pressure switch is provided between the air source and the air pipe.

[0009] Further, the telescopic rod includes a moving rod, a telescopic sleeve rod, and a lifting air cylinder. The moving rod is slidably disposed below the moving track, the upper end of the moving rod is slidably disposed within the moving track, the telescopic sleeve rod is sleeved outside the moving rod, the lifting air cylinder is fixedly disposed within the moving rod, and the output end of the lifting air cylinder is fixedly connected to the lower end of the telescopic sleeve rod.

[0010] Further, a lead screw is rotatably disposed within the moving track. The lead screw is threadedly connected to the upper end of the moving rod, and a driving motor is fixedly disposed outside the moving track. The output end of the driving motor is connected to the lead screw.

[0011] Further, a control cabinet is provided on one side of the support. The control cabinet is disposed on the side of the support away from the sandblasting cabinet, and a plurality of control buttons are provided on the outer wall of the control cabinet.

[0012] Further, a plurality of sandblasting tanks are provided. The number of sandblasting tanks is half of the number of sandblasting guns, and one sandblasting tank is connected to two adjacent sandblasting guns.

[0013] The beneficial effects achieved by the present utility model with the above structure are as follows:

[0014] 1. Batch construction, shortening the construction time and improving work efficiency;

[0015] 2. Low failure rate, facilitating maintenance and repair;

[0016] 3. Simple operation, accurate positioning, and no need for personnel operation intervention throughout the process;

[0017] 4. Reducing personnel safety risks, health risks, and the company's safety management risks;

[0018] 5. Reducing labor costs and construction input costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional view of the reactor tube batch sandblasting tool proposed by this solution;

[0020] Figure 2 It is a front view structural schematic diagram of the reactor tube batch sandblasting tool proposed by this solution;

[0021] Figure 3It is a top - view structural schematic diagram of the reactor tube bank batch sand - blasting tool proposed in this solution;

[0022] Figure 4 It is a side - view structural schematic diagram of the reactor tube bank batch sand - blasting tool proposed in this solution.

[0023] The attached drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the attached drawings: 1. Moving track, 2. Bracket, 3. Telescopic rod, 4. Support plate, 5. Sand - blasting gun, 6. Sand - blasting cabinet, 7. Moving roller, 8. Expansion cylinder, 9. Sand - blasting tank, 10. Air source, 11. Sand - blasting pipe, 12. Flow switch, 13. Air pipe, 14. Pressure switch, 15. Moving rod, 16. Telescopic sleeve rod, 17. Lifting cylinder, 18. Lead screw, 19. Driving motor, 20. Control cabinet, 21. Control button. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0025] As Figures 1 to 4 shown, the reactor tube bank batch sand - blasting tool proposed in this solution includes a moving track 1, brackets 2, telescopic rods 3, support plates 4, sand - blasting guns 5 and a sand - blasting cabinet 6. There are two brackets 2 which are arranged in a vertically - flipped T - shape. The two brackets 2 are symmetrically arranged below both ends of the moving track 1. The telescopic rod 3 is slidably arranged below the moving track 1. The support plate 4 is fixedly arranged below the telescopic rod 3. The sand - blasting gun 5 is fixedly arranged on one side of the support plate 4. There are several sand - blasting guns 5. The sand - blasting cabinet 6 is arranged on one side of the bracket 2. Moving rollers 7 are arranged below both ends of the bracket 2. An expansion cylinder 8 is arranged on one side of the moving roller 7. The expansion cylinder 8 penetrates through the bottom wall of the bracket 2. A sand - blasting tank 9 and an air source 10 are arranged inside the sand - blasting cabinet 6. The sand - blasting guns 5 are respectively connected to the sand - blasting tank 9 and the air source 10. A sand - blasting pipe 11 is arranged between the sand - blasting gun 5 and the sand - blasting tank 9. Both ends of the sand - blasting pipe 11 are respectively connected to the sand - blasting gun 5 and the sand - blasting tank 9. A flow switch 12 is arranged between the sand - blasting tank 9 and the sand - blasting pipe 11. An air pipe 13 is arranged between the sand - blasting gun 5 and the air source 10. Both ends of the air pipe 13 are respectively connected to the sand - blasting gun 5 and the air source 10. A pressure switch 14 is arranged between the air source 10 and the air pipe 13.

[0026] As Figure 2 andFigure 4 As shown, the telescopic rod 3 includes a moving rod 15, a telescopic sleeve rod 16 and a lifting cylinder 17. The moving rod 15 is slidably arranged below the moving track 1. The upper end of the moving rod 15 is slidably arranged in the moving track 1. The telescopic sleeve rod 16 is sleeved outside the moving rod 15. The lifting cylinder 17 is fixedly arranged in the moving rod 15. The output end of the lifting cylinder 17 is fixedly connected to the lower end of the telescopic sleeve rod 16. A lead screw 18 is rotatably arranged in the moving track 1. The lead screw 18 is threadedly connected to the upper end of the moving rod 15. A driving motor 19 is fixedly arranged outside the moving track 1. The output end of the driving motor 19 is connected to the lead screw 18.

[0027] Among them, a control cabinet 20 is arranged on one side of the bracket 2. The control cabinet 20 is arranged on one side of the bracket 2 away from the sandblasting cabinet 6. A plurality of control buttons 21 are arranged on the outer wall of the control cabinet 20. A plurality of sandblasting tanks 9 are provided. The number of the sandblasting tanks 9 is half of the number of the sandblasting guns 5. One sandblasting tank 9 is connected to two adjacent sandblasting guns 5.

[0028] During specific use, when preparing for sandblasting, the bracket 2 is moved to a specified position through the moving roller 7. At this time, the expansion cylinder 8 extends. One end of the expansion cylinder 8 extends into the reactor tube bundle. At the same time, the lower end of the expansion cylinder 8 expands in the tube bundle, so as to fix the bracket 2 to ensure that the bracket 2 is not flushed open by the sandblasting reaction force. During sandblasting, the driving motor 19 drives the lead screw 18 to rotate. The rotating lead screw 18 drives the moving rod 15 to move along the moving track 1. After moving to the specified position, the lifting cylinder 17 extends, pushing the telescopic sleeve rod 16 to descend, so that the sandblasting gun 5 at the lower end of the telescopic sleeve rod 16 extends into the tube bundle, and the flow switch 12 and the pressure switch 14 are opened, so as to perform sandblasting and rust removal on the tube bundle.

[0029] Considering the influence of pressure drop on the sandblasting effect during sandblasting, at most half of the sandblasting guns 5 can be started to perform the sandblasting task at the same time during sandblasting. The adjacent sandblasting guns 5 work alternately. One sandblasting tank 9 drives one sandblasting gun 5 to work at a time. If the flow rate is lower than the set value, the flow switch 12 closes the sandblasting pipe 11 connected to the sandblasting gun 5 and alarms. At this time, manual reset is required to ensure that the flow rate is restored before continuing sandblasting. When the pressure switch 14 of the gas source 10 detects low pressure, sandblasting will stop or sandblasting cannot be started until the pressure is restored.

[0030] An air circuit interlock is set. If the expansion cylinder 8 is not started, sandblasting cannot be started, which improves safety. After the sandblasting time ends, the expansion cylinder 8 can be retracted only after pressing the sandblasting end button. The base of the bracket 2 is provided with four rollers to facilitate the movement of the bracket 2 for sandblasting the next batch of tube bundles.

[0031] When designing 12 sandblasting guns 5, every 6 sandblast guns sandblast alternately, and a counter is set. After each sandblasting, the counter records an increase of 12, which can monitor the completion rate and the unfinished rate. Only one person is required to operate, saving labor costs. The center distance of each sandblasting gun 5 is 59 mm, and it can be finely adjusted by plus or minus 5 mm.

[0032] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Reactor tube bank batch sandblasting tool, characterized in that: It includes a moving track, brackets, telescopic rods, a support plate, a sandblasting gun, and a sandblasting cabinet. There are two brackets which are arranged in a vertically flipped T shape, and the two brackets are symmetrically arranged below both ends of the moving track. The telescopic rod is slidably arranged below the moving track, the support plate is fixedly arranged below the telescopic rod, the sandblasting gun is fixedly arranged on one side of the support plate, there are several sandblasting guns, the sandblasting cabinet is arranged on one side of the bracket, moving rollers are arranged below both ends of the bracket, an expansion cylinder is arranged on one side of the moving roller, the expansion cylinder penetrates through the bottom wall of the bracket, a sandblasting tank and a gas source are arranged inside the sandblasting cabinet, and the sandblasting guns are respectively connected to the sandblasting tank and the gas source.

2. The reactor tube bank batch sandblasting tool according to claim 1, characterized in that: A sandblasting pipe is arranged between the sandblasting gun and the sandblasting tank, both ends of the sandblasting pipe are respectively connected to the sandblasting gun and the sandblasting tank, and a flow switch is arranged between the sandblasting tank and the sandblasting pipe.

3. The reactor tube bank batch sandblasting tool according to claim 1, characterized in that: An air pipe is arranged between the sandblasting gun and the gas source, both ends of the air pipe are respectively connected to the sandblasting gun and the gas source, and a pressure switch is arranged between the gas source and the air pipe.

4. The reactor tube bank batch sandblasting tool according to claim 1, characterized in that: The telescopic rod includes a moving rod, a telescopic sleeve rod, and a lifting cylinder. The moving rod is slidably arranged below the moving track, the upper end of the moving rod is slidably arranged inside the moving track, the telescopic sleeve rod is sleeved outside the moving rod, the lifting cylinder is fixedly arranged inside the moving rod, and the output end of the lifting cylinder is fixedly connected to the lower end of the telescopic sleeve rod.

5. The reactor tube bank batch sandblasting tool according to claim 4, wherein: A lead screw is rotatably arranged inside the moving track, the lead screw is threadedly connected to the upper end of the moving rod, a driving motor is fixedly arranged outside the moving track, and the output end of the driving motor is connected to the lead screw.

6. The reactor tube bank batch sandblasting tool according to claim 1, characterized in that: A control cabinet is arranged on one side of the bracket, the control cabinet is arranged on the side of the bracket away from the sandblasting cabinet, and several control buttons are arranged on the outer wall of the control cabinet.

7. The reactor tube bank batch sandblasting tool according to claim 1, characterized in that: There are several sandblasting tanks, the number of sandblasting tanks is half of the number of sandblasting guns, and one sandblasting tank is connected to two adjacent sandblasting guns.

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