CN108691408B

CN108691408B - Scaffold with wear-resistant and corrosion-resistant coating

Info

Publication number: CN108691408B
Application number: CN201710327940.5A
Authority: CN
Inventors: 潘阳
Original assignee: Ningbo Shenxiang Machine Manufacturing Co ltd
Current assignee: Ningbo Xiangrun Machinery Manufacturing Co.,Ltd.
Priority date: 2017-05-11
Filing date: 2017-05-11
Publication date: 2021-05-25
Anticipated expiration: 2037-05-11
Also published as: CN108691408A

Abstract

The invention discloses a scaffold with a wear-resistant anticorrosive coating, which comprises a plurality of vertical rods and connecting rods connected between the vertical rods, wherein a connecting disc for connecting the connecting rods to the vertical rods is arranged on each vertical rod, a plurality of connecting holes are formed in the connecting disc, a buckle structure for fixing the connecting rods on the connecting disc is further arranged at the end part of each connecting rod, the buckle structure comprises two buckle bodies vertically arranged at intervals, the distance between the two buckle bodies is consistent with the thickness of the connecting disc, a clamping tongue is further arranged on the opposite surface of each buckle body, an accommodating cavity is formed in the opposite surface of each buckle body, the clamping tongue can slide in the accommodating cavity through a telescopic piece, and when the clamping tongue extends out of the accommodating cavity, the clamping tongue is just clamped into the. The wear-resistant and corrosion-resistant coating is coated on the scaffold, so that the prepared coating is high in adhesion and strong in corrosion resistance and wear resistance, and the coating is coated on the scaffold, so that the overall wear resistance and corrosion resistance of the scaffold are enhanced, the service life of the scaffold is prolonged, and safety guarantee is brought to constructors.

Description

Scaffold with wear-resistant and corrosion-resistant coating

Technical Field

The invention relates to the technical field of construction tools, in particular to a scaffold with a wear-resistant and anti-corrosion coating.

Background

The scaffold is various supports erected for workers to operate and work at a high place on a construction site, is a general term in the field of buildings, and is mainly used on an outer wall, interior decoration or a place with a higher floor height and incapable of being directly constructed on the construction site.

At present, most of scaffolds used are made of steel pipe materials, and because the steel pipes are high in strength, good in durability and long in service life, the scaffolds are favored by workers. However, because the scaffold is exposed for a long time and used in natural environment, the scaffold is exposed to the sun, is wetted by rain and snow and does not have any protective measures, so that the scaffold is easy to corrode, the scaffold is corroded to greatly reduce the bearing capacity of the scaffold, in addition, the scaffold is worn and torn for a long time, so that the connection between the steel pipe and the connecting clamping piece is influenced, the joints are easy to move, potential safety hazards are brought to workers in scaffold operation, and the service life of the scaffold is also greatly reduced. It is therefore necessary to coat the outer surface of the scaffolding with a wear-resistant and corrosion-resistant coating to prevent excessive wear and corrosion of the scaffolding, thereby increasing the service life of the scaffolding.

In addition, the existing scaffold is assembled and connected in a mode that the connecting disc is matched with the buckle structure, the connecting disc is provided with the connecting hole, the buckle structure is correspondingly provided with a through hole, the buckle structure is clamped into the connecting disc, the through hole in the buckle structure corresponds to the connecting hole in the connecting disc, and then the fixing block is inserted into the through hole to realize the assembling and clamping of the scaffold.

Disclosure of Invention

The invention aims to provide a scaffold with a wear-resistant and anti-corrosion coating, which can realize quick assembly and connection.

In order to achieve the purpose, the method is realized by the following technical means:

the utility model provides a scaffold frame with wear-resisting anticorrosive coating, includes the montant of a plurality of vertical settings and connects the connecting rod between the montant, is provided with on the montant to be used for being connected to the connecting pad on the montant with the connecting rod, is provided with a plurality of connecting hole on the connecting pad, still is provided with the buckle structure of fixing the connecting rod on the connecting pad at the tip of connecting rod, buckle structure includes the lock body that two vertical intervals set up, and the interval of two lock bodies is unanimous with the thickness of connecting pad, and the opposite face of lock body still is provided with the card tongue, has seted up a holding chamber in the opposite face of lock body, and the card tongue can slide in the holding intracavity through a extensible member, when the.

Through the technical scheme, the buckle structure comprises the buckle body and the clamping tongue, the clamping tongue can stretch in the buckle body, when the scaffold is required to be assembled, the buckle body is clamped into the connecting disc, the clamping tongue can stretch out and draw back to be clamped into the connecting hole of the connecting disc, the scaffold can be assembled, the stretching of the clamping tongue is automatically controlled through the switch, and the scaffold is easy and convenient to assemble and easy to operate.

The method is further optimized as follows: the telescopic piece comprises an electromagnet and a spring connected between the electromagnet and the clamping tongue, the power on/off state of the electromagnet is controlled by a control module of a switch circuit, when the electromagnet is powered on, the clamping tongue is adsorbed by the electromagnet and is retracted in the accommodating cavity, and when the electromagnet is powered off, the clamping tongue extends out of the accommodating cavity under the restoring force action of the spring and is clamped on the mounting hole of the connecting clamping piece.

According to the technical scheme, the spring is connected with the clamping tongue and the electromagnet, when the electromagnet is powered on, the clamping tongue is adsorbed by the electromagnet and is retracted into the accommodating cavity, and when the electromagnet is powered off, the clamping tongue extends out of the accommodating cavity under the restoring force of the spring and is clamped on the connecting hole of the connecting disc. The electric power is used for controlling the telescopic motion of the clamping tongue, and the device is intelligent, simple, convenient and easy to operate.

The method is further optimized as follows: the width of the clamping tongue along the radial direction of the connecting disc is consistent with the width of the connecting hole along the radial direction of the connecting disc.

Through above-mentioned technical scheme, with the block tongue along the radial ascending width setting of flange unanimous with connecting hole along the radial ascending width of flange, just can not remove about the connecting hole card is gone into like this to make whole buckle structure can not rock, guaranteed the steadiness that the connecting rod was fixed to on the montant.

The wear-resistant anticorrosive coating for the scaffold is further optimized to comprise the following components in parts by weight:

the method is further optimized as follows: the wear-resistant anticorrosive coating for the scaffold comprises the following components in parts by weight:

the method is further optimized as follows: the solvent is prepared from xylene and acetone according to a weight ratio of 5-7: 3.

The method is further optimized as follows: the pigment and filler is one or a combination of more of graphite, molybdenum disulfide, chromium oxide, silicon dioxide, bronze powder and titanium oxide.

The method is further optimized as follows: the defoaming agent is 201 silicone oil.

The method is further optimized as follows: the coupling agent is one or a combination of more than one of KH-550, KH-560 and KH-570.

The method is further optimized as follows: the preparation method of the coating comprises the following steps:

step one, weighing raw materials according to the weight components;

step two, sequentially adding the weighed polyurethane, TDI, butyl acetate and polytetrafluoroethylene into castor oil, then adding a solvent into the castor oil, mixing the solution, continuously stirring the solution by using a stirrer, heating the solution by using a water bath, and reacting the solution for 3 to 4 hours at a constant temperature of 40 to 50 ℃ to obtain a prepolymer;

step three, adding the prepolymer obtained in the step two into a reaction kettle, adding triethanolamine, dibutyltin dilaurate, pigment fillers and coupling agents into the reaction kettle, heating to 200-300 ℃, keeping the pressure at 0.2-0.3 MPa, and reacting for 3-4 hours to obtain a preparation coating;

step four, adding a defoaming agent into the prepared coating obtained in the step three, continuously stirring for 1-2 hours at normal temperature, and then filtering the final product to remove scum to obtain the wear-resistant anticorrosive coating for the scaffold;

and fifthly, coating the coating obtained in the fourth step on a scaffold, and curing at normal temperature for 24-48 h to obtain the wear-resistant anticorrosive coating for the scaffold.

The invention has the beneficial effects that: the pigment and filler are hard particles and have good wear resistance, the pigment and filler are added into the components of the coating, the pigment and filler are uniformly dispersed in the reaction process and are uniformly dispersed in the final coating product, the wear resistance of the coating is improved, the coating is coated on a scaffold, and the super-strong wear resistance of the coating enables the surface layer of the scaffold to be wear resistant. Meanwhile, hard particles such as oxides and the like are uniformly distributed on the surface of the coating to play a supporting role, so that the hardness of the coating is increased, and the wear resistance of the coating is enhanced. The coating that is used for the material to make, the adhesion force is high, corrosivity resistance and wearability are strong, improve the mechanical strength of coating, adhesive force and corrosion protection ability etc, coat on the scaffold, make the whole wearability and the corrosion resistance reinforcing of scaffold, shine in the wind, the coating has played the effect of protective layer when contacting external sleet and erodeing, prevent that the scaffold from being eroded by sleet, the wearing and tearing between fastener and the steel pipe are connected to the scaffold has still been reduced in the existence of coating, thereby the life of scaffold has been prolonged, also brought the safety guarantee for constructor.

Compared with the prior art, the connecting rod fixing device has the advantages that the buckle structure is set to be a structure that the buckle body is matched with the clamping tongue, the clamping tongue can slide in the accommodating cavity of the buckle body through the telescopic structure, the electromagnet in the telescopic structure is controlled by the control module of the switch circuit, and therefore the clamping tongue is controlled by the circuit to extend into the connecting hole extending out of the connecting disc to fix the connecting rod, and the connecting rod fixing device is intelligent, simple, convenient and easy to operate.

Drawings

Fig. 1 is a schematic structural view of a scaffold assembly connection in the present embodiment;

FIG. 2 is an exploded view of the snap and the connecting plate in this embodiment;

FIG. 3 is an exploded cross-sectional view of the body of the buckle of the present embodiment;

fig. 4 is a circuit diagram of a control switch of the electromagnet in the present embodiment.

In the figure, 1, a vertical rod; 2. a connecting rod; 3. a connecting disc; 4. connecting holes; 5. a buckle structure; 6. buckling the body; 7. a connecting seat; 8. a latch; 81. a tongue end; 9. a spring; 10. an accommodating cavity; 11. an electromagnet; 12. a control module; 13. a current limiting resistor.

Detailed Description

The invention will be further described by means of specific embodiments, which are given by way of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1, a scaffold with wear-resistant anticorrosive coating comprises a plurality of vertical rods 1 and connecting rods 2 connected between the vertical rods 1, wherein connecting discs 3 are arranged on the vertical rods 1, a plurality of connecting holes 4 are formed in the connecting discs 3, and buckle structures 5 are arranged between the end parts of the connecting rods 2 and the connecting discs 3. As shown in fig. 2, the buckle structure 5 includes a buckle body 6 vertically spaced apart from each other, a tongue 8 is disposed on the opposite surface of the buckle body 6, an accommodating cavity 10 is further disposed on the opposite surface of the buckle body 6, and the tongue 8 slides in the accommodating cavity 10 through a telescopic structure. When the clamping tongue 8 extends out of the accommodating cavity 10, the clamping tongue 8 is just clamped into the connecting hole 4 of the connecting disc 3, the width of the clamping tongue 8 along the radial direction of the connecting disc 3 is consistent with the width of the connecting hole 4 along the radial direction of the connecting disc 3, and therefore the clamping tongue 8 cannot swing left, right, front and back after being clamped into the connecting hole 4. As shown in fig. 3, the telescopic structure includes an electromagnet 11 and a spring 9 connected between the electromagnet 11 and the latch 8, the shape of the latch 8 is the same as the shape of the accommodating cavity 10, the latch 8 can slide in the accommodating cavity 10, and the electromagnet 11 is controlled by a control module 12 of a switch circuit. As shown in fig. 4, the switching circuit includes a control module 12, an electromagnet 11 connected in parallel with the control module 12, and a current limiting resistor 13, the control module 12 includes a transmitter and a receiver, the transmitter transmits a signal to the receiver to control the power on/off of the electromagnet 11, the transmitter is a transmitter of the model DM-16 of a bull, and the receiver is a receiver of the model simmer M11. When the electromagnet 11 is powered on, the clamping tongue 8 is sucked by the electromagnet 11 and is sucked into the accommodating cavity 10 of the buckle body 6, the buckle structure 5 is not clamped on the connecting disc 3, and the connecting rod 2 is not fixedly connected with the vertical rod 1; when the electromagnet 11 loses power, the clamping tongues 8 extend out of the accommodating cavities 10 of the buckle bodies 6 under the restoring force action of the springs 9 and are clamped into the connecting holes 4 of the connecting disc 3, the clamping tongues 8 are arranged on the upper buckle body 6 and the lower buckle body 6, the upper clamping tongue 8 and the lower clamping tongue 8 are clamped into the connecting holes 4, the tongue ends 81 of the clamping tongues 8 are made of magnetic materials, and the upper clamping tongue 8 and the lower clamping tongue 8 are attracted together due to magnetic force and are jointly fixed in the connecting holes 4, so that the connecting rod 2 and the vertical rod 1 are fixed.

The outer surface of the scaffold is coated with a wear-resistant anticorrosive coating, and the wear-resistant anticorrosive coating comprises the following components in parts by weight:

the solvent is prepared from dimethylbenzene and acetone according to the weight ratio of 7: 3.

The pigment and filler is a mixture of graphite, molybdenum disulfide and chromium sesquioxide.

The defoaming agent is 201 silicone oil.

The coupling agent is KH-560.

The preparation method of the wear-resistant anticorrosive paint comprises the following steps:

step one, weighing raw materials according to the weight components;

step two, sequentially adding the weighed polyurethane, TDI, butyl acetate and polytetrafluoroethylene into castor oil, then adding a solvent into the castor oil, mixing the solution, continuously stirring the solution by using a stirrer, heating the solution by using a water bath, and reacting the solution at a constant temperature of 50 ℃ for 4 hours to obtain a prepolymer;

step three, adding the prepolymer obtained in the step two into a reaction kettle, adding triethanolamine, dibutyltin dilaurate, pigment fillers and coupling agents into the reaction kettle, heating to 300 ℃, keeping the pressure at 0.3MPa, and reacting for 4 hours to obtain a preparation coating;

step four, adding a defoaming agent into the prepared coating obtained in the step three, continuously stirring for 2 hours at normal temperature, and then filtering the final product to remove scum to obtain the wear-resistant anticorrosive coating for the scaffold;

and fifthly, coating the coating obtained in the fourth step on a scaffold, and curing at normal temperature for 48 hours to obtain the wear-resistant anticorrosive coating for the scaffold.

Example 2

A scaffold with a wear-resistant anticorrosive coating comprises the following components in parts by weight:

the solvent is prepared from dimethylbenzene and acetone according to the weight ratio of 5: 3.

The pigment and filler is a mixture of graphite and molybdenum disulfide.

The defoaming agent is 201 silicone oil.

The coupling agent is KH-550.

A scaffold with a wear-resistant and corrosion-resistant coating, the coating is prepared by the following steps:

step one, weighing raw materials according to the weight components;

step two, sequentially adding the weighed polyurethane, TDI, butyl acetate and polytetrafluoroethylene into castor oil, then adding a solvent into the castor oil, mixing the solution, continuously stirring the solution by using a stirrer, heating the solution by using a water bath, and reacting the solution for 3 hours at a constant temperature of 40 ℃ to obtain a prepolymer;

step three, adding the prepolymer obtained in the step two into a reaction kettle, adding triethanolamine, dibutyltin dilaurate, a pigment filler and a coupling agent into the reaction kettle, heating to 200 ℃, keeping the pressure at 0.2MPa, and reacting for 3 hours to obtain a preparation coating;

step four, adding a defoaming agent into the prepared coating obtained in the step three, continuously stirring for 1 hour at normal temperature, and then filtering the final product to remove scum to obtain the wear-resistant anticorrosive coating for the scaffold;

and fifthly, coating the coating obtained in the fourth step on a scaffold, and curing at normal temperature for 24 hours to obtain the wear-resistant anticorrosive coating for the scaffold.

Example 3

The pigment and filler is a mixture of molybdenum disulfide, chromium sesquioxide and silicon dioxide.

The defoaming agent is 201 silicone oil.

The coupling agent is KH-570.

A preparation method of wear-resistant anticorrosive paint for hand racks comprises the following steps:

step one, weighing raw materials according to the weight components;

step two, sequentially adding the weighed polyurethane, TDI, butyl acetate and polytetrafluoroethylene into castor oil, then adding a solvent into the castor oil, mixing the solution, continuously stirring the solution by using a stirrer, heating the solution by using a water bath, and reacting the solution for 3.2 hours at a constant temperature of 42 ℃ to obtain a prepolymer;

step three, adding the prepolymer obtained in the step two into a reaction kettle, adding triethanolamine, dibutyltin dilaurate, a pigment filler and a coupling agent into the reaction kettle, heating to 220 ℃, keeping the pressure at 0.22MPa, and reacting for 3.2 hours to obtain a prepared coating;

step four, adding a defoaming agent into the prepared coating obtained in the step three, continuously stirring for 1.2 hours at normal temperature, and then filtering the final product to remove scum to obtain the wear-resistant anticorrosive coating for the scaffold;

and fifthly, coating the coating obtained in the fourth step on a scaffold, and curing at normal temperature for 30h to obtain the wear-resistant anticorrosive coating for the scaffold.

Example 4

The pigment and filler is a mixture of chromium oxide, silicon dioxide and bronze powder.

The defoaming agent is 201 silicone oil.

The coupling agent is KH-570.

step one, weighing raw materials according to the weight components;

step two, sequentially adding the weighed polyurethane, TDI, butyl acetate and polytetrafluoroethylene into castor oil, then adding a solvent into the castor oil, mixing the solution, continuously stirring the solution by using a stirrer, heating the solution by using a water bath, and reacting the solution for 3.8 hours at a constant temperature of 48 ℃ to obtain a prepolymer;

step three, adding the prepolymer obtained in the step two into a reaction kettle, adding triethanolamine, dibutyltin dilaurate, a pigment filler and a coupling agent into the reaction kettle, heating to 280 ℃, keeping the pressure at 0.28MPa, and reacting for 3.8 hours to obtain a prepared coating;

step four, adding a defoaming agent into the prepared coating obtained in the step three, continuously stirring for 1.8 hours at normal temperature, and then filtering the final product to remove scum to obtain the wear-resistant anticorrosive coating for the scaffold;

and fifthly, coating the coating obtained in the fourth step on a scaffold, and curing at normal temperature for 40h to obtain the wear-resistant anticorrosive coating for the scaffold.

Example 5

the solvent is prepared from dimethylbenzene and acetone according to the weight ratio of 6: 3.

The method is further optimized as follows: the pigment and filler is a mixture of graphite, molybdenum disulfide and titanium oxide.

The method is further optimized as follows: the coupling agent is KH-550.

step one, weighing raw materials according to the weight components;

step two, sequentially adding the weighed polyurethane, TDI, butyl acetate and polytetrafluoroethylene into castor oil, then adding a solvent into the castor oil, mixing the solution, continuously stirring the solution by using a stirrer, heating the solution by using a water bath, and reacting the solution for 3.5 hours at a constant temperature of 45 ℃ to obtain a prepolymer;

step three, adding the prepolymer obtained in the step two into a reaction kettle, adding triethanolamine, dibutyltin dilaurate, a pigment filler and a coupling agent into the reaction kettle, heating to 250 ℃, keeping the pressure at 0.25MPa, and reacting for 3.5 hours to obtain a prepared coating;

step four, adding a defoaming agent into the prepared coating obtained in the step three, continuously stirring for 1.5 hours at normal temperature, and then filtering the final product to remove scum to obtain the wear-resistant anticorrosive coating for the scaffold;

and fifthly, coating the coating obtained in the fourth step on a scaffold, and curing at normal temperature for 36 hours to obtain the wear-resistant anticorrosive coating for the scaffold.

A small section with the length of 120mm is cut from a vertical rod of a scaffold to be used as a sample, the adhesion and the hardness of the wear-resistant anticorrosive coating for the scaffold obtained in the embodiment 1-5 are respectively tested according to GB1720-1979 and GB 1727-70, the vertical rod sample coated with the coating is placed in a constant-temperature oven at 280 ℃, the sample is baked for 3 hours, and whether the coating falls off, foams and cracks are observed to test the change condition of the adhesion. According to the GB1763-1989 standard, the steel pipe samples with the prepared coatings are respectively put into corrosive media to carry out a soaking test so as to test the medium corrosion resistance of the coatings. A JM-IV type paint film abrasion tester is adopted for testing under the test conditions of 750g load and 75r/min, and the abrasion resistance of the paint film is represented by the weight loss of the paint film (GB/T1768-2006). The resulting performance index of the coating is shown in table 1.

TABLE 1 Performance indices of the abrasion-resistant and corrosion-resistant coatings for scaffolds obtained in examples 1 to 5

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A scaffold with wear-resistant and corrosion-resistant coatings comprises a plurality of vertical rods (1) which are vertically arranged and connecting rods (2) which are connected between the vertical rods (1), wherein a connecting disc (3) which is used for connecting the connecting rods (2) to the vertical rods (1) is arranged on each vertical rod (1), and a plurality of connecting holes (4) are arranged on each connecting disc (3), the scaffold is characterized in that a buckle structure (5) which is used for fixing the connecting rods (2) on the connecting discs (3) is further arranged at the end part of each connecting rod (2), each buckle structure (5) comprises two buckle bodies (6) which are vertically arranged at intervals, the distance between the two buckle bodies (6) is consistent with the thickness of the connecting discs (3), clamping tongues (8) are further arranged on the opposite surfaces of the buckle bodies (6), a containing cavity (10) is formed in the opposite surfaces of the buckle bodies (6), and each clamping tongue (8) can slide in, when the clamping tongue (8) extends out of the accommodating cavity (10), the clamping tongue is just clamped into the connecting hole (4); the telescopic piece comprises an electromagnet (11) and a spring (9) connected between the electromagnet (11) and a clamping tongue (8), the power on/off of the electromagnet (11) is controlled by a control module (12) of a switching circuit, when the electromagnet (11) is powered on, the clamping tongue (8) is adsorbed by the electromagnet (11) and is contracted in the accommodating cavity (10), and when the electromagnet (11) is powered off, the clamping tongue (8) extends out of the accommodating cavity (10) under the restoring force action of the spring (9) and is clamped on a connecting hole (4) of the connecting disc (3); the width of the clamping tongue (8) along the radial direction of the connecting disc (3) is consistent with the width of the connecting hole (4) along the radial direction of the connecting disc (3); the coating comprises the following components in parts by weight:

80-100 parts of polyurethane;

10-20 parts of TDI;

10-20 parts of butyl acetate;

0.1-2 parts of polytetrafluoroethylene;

40-60 parts of a solvent;

5-7 parts of castor oil;

0-0.3 part of triethanolamine;

0.05-0.3 part of dibutyltin dilaurate;

0.1-1.0 part of pigment and filler;

0.5-0.8 part of defoaming agent;

0.1-0.3 part of coupling agent.

2. The scaffold with the wear-resistant and corrosion-resistant coating according to claim 1, wherein the coating comprises the following components in parts by weight:

85-95 parts of polyurethane;

12-18 parts of TDI;

12-18 parts of butyl acetate;

0.5-2 parts of polytetrafluoroethylene

45-55 parts of a solvent;

5.5-6.5 parts of castor oil;

0.1-0.2 parts of triethanolamine;

0.1-0.25 parts of dibutyltin dilaurate;

0.2-1.0 part of pigment and filler;

0.56-0.78 parts of defoaming agent;

0.15-0.3 part of coupling agent.

3. The scaffold with the wear-resistant and corrosion-resistant coating as claimed in claim 2, wherein the solvent is prepared from xylene and acetone according to a weight ratio of 5-7: 3.

4. The scaffold with the wear-resistant and corrosion-resistant coating according to claim 3, wherein the pigment and filler is one or a combination of graphite, molybdenum disulfide, chromium oxide, silicon dioxide, bronze powder and titanium oxide.

5. A scaffolding with a wear resistant and corrosion resistant coating as claimed in claim 4, wherein said anti-foaming agent is 201 silicone oil.

6. The scaffold with the wear-resistant and corrosion-resistant coating according to claim 5, wherein the coupling agent is one or a combination of KH-550, KH-560 and KH-570.

7. A scaffolding with a wear resistant and corrosion resistant coating according to claim 6, wherein the coating is prepared by a method comprising the steps of:

step one, weighing raw materials according to the weight components;