CN220444271U - Device for brushing mold release oil of concrete mold - Google Patents

Abstract

The utility model relates to a device for brushing concrete mold release oil, wherein a telescopic rod of a servo motor is fixedly connected with a piston in an oil tank, a buckle is inserted at an outlet of the oil tank, and one end of a connecting frame is inserted at the lower end of the oil tank in a sealing way. One end of the pressure spring is sleeved on one side, far away from the outlet of the oil tank, of the buckle, an opening is formed in the position, corresponding to the other end of the pressure spring, of the connecting frame, a cylindrical section and a round table section of the hole plug form a step, the other end of the pressure spring is sleeved on the cylindrical section, and the pressure spring is in a compression state. The shape of the hollow area of the oil storage plate is cuboid, the lower end corresponds to the hollow area and is communicated with bristles, the bristles are provided with oil outlets, the cross section of the hollow area of the oil storage plate is identical to that of a concrete mold, the bristles are uniformly distributed on the lower end face of the oil storage plate, one side of the oil storage plate, which is far away from the bristles, is provided with hollow protrusions, the protrusions are in sealing plug connection with the other end of the connecting frame, oil plugs are arranged on the outer sides of the protrusions and tightly propped against the outer sides of the circular table sections through openings, and gaps are reserved between the circular table sections and the openings.

Description

Device for brushing mold release oil of concrete mold

Technical Field

The utility model belongs to the field of concrete experimental equipment, and particularly relates to a device for brushing concrete mold release oil.

Background

In concrete experiments, different concrete test pieces are required to be manufactured according to different experiment contents, and the concrete test pieces are required to be demolded from a die after solidification and maintenance in the die are completed. In order to facilitate the demoulding of concrete test pieces from the mould, the mould release oil needs to be painted on the inner wall of the mould before the concrete slurry is poured into the mould, but the demoulding process of the concrete is still quite difficult.

The earliest main of the parting oil is that the parting oil is dipped by a hairbrush for painting on the inner wall of the mould, the efficiency of manually painting the parting oil is very low, the labor is wasted, the exposure time of the painted parting oil in the air is too long, and the parting oil effect can be greatly reduced, so that the demoulding of the concrete test piece is difficult.

At present, in the demoulding direction of a concrete test piece, there are reports of improving a demoulding air gun and improving a brush for brushing demoulding oil, such as Chinese patent with an authorized publication number of CN205130096U and a name of 'a mould brush for brushing a glue sand mould demoulding agent', and Chinese patent with an authorized publication number of CN212702763U and a name of 'a mould release agent brushing device', so as to improve the demoulding efficiency, but still the automatic brushing of the demoulding oil of the concrete mould cannot be realized, and further the brushing efficiency of the demoulding oil of the concrete test piece is affected.

The Chinese patent with the authority of CN209364916U and the name of a demoulding device for recycled concrete encaustic tiles mentions that when a tray moves along with a working sliding table to the position right below an upper mould, a demoulding cylinder works to push a demoulding frame to extend out of the upper mould, so that the tile is separated from the upper mould, and the method is convenient and quick; simultaneously, the demolding oil smearing mechanism smears the demolding oil on the surface of the upper mold uniformly through the oil brush between every two times of pressing, so that the demolding oil is adsorbed on the upper mold uniformly. However, unlike recycled concrete encaustic tile molds, the stripping device for recycled concrete encaustic tiles cannot be used for automatic brushing of the concrete mold stripping oil.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a device for brushing the concrete mold release oil, which has reasonable design and simple structure, can automatically brush the concrete mold release oil, and greatly improves the brushing efficiency of the release oil.

The utility model is realized by the following technical scheme:

a device for brushing concrete mold release oil comprises a servo motor, an oil tank, a connecting component and a brush;

the servo motor is in sealed connection with the oil tank, a piston with the same cross section shape as the oil tank is arranged in the oil tank, the lower end of a telescopic rod of the servo motor is fixedly connected with the piston, the connecting component comprises a hole plug, a pressure spring, an annular hollow connecting frame and a buckle with a hollow structure, the buckle is inserted at the outlet of the oil tank, and one end of the connecting frame is in sealed insertion fit with the lower end of the oil tank;

one end of the pressure spring is sleeved on one side of the buckle, which is far away from the outlet of the oil tank, an opening is formed in a position, corresponding to the other end of the pressure spring, of the connecting frame, the hole plug comprises a cylindrical section and a round platform section which are integrally structured, a ladder is formed by the tail end of the cylindrical section and the round platform section, the other end of the pressure spring is sleeved on the cylindrical section, and the pressure spring is in a compressed state;

the brush comprises bristles and a hollow oil storage plate, wherein the hollow area of the oil storage plate is cuboid, the lower end of the oil storage plate is communicated with the bristles, oil outlets are formed in the bristles, the cross section of the hollow area of the oil storage plate is identical to the cross section of a concrete mold to be painted, the bristles are uniformly distributed on the lower end face of the oil storage plate, a protrusion of a hollow structure is arranged on one side, away from the bristles, of the oil storage plate, the protrusion is in sealing plug connection with the other end of the connecting frame, an oil through plug is arranged on the outer side of the protrusion, the oil through plug is tightly propped against the outer side of the round table section through an opening, and a gap is reserved between the round table section and the opening.

Preferably, the longitudinal section of the buckle is T-shaped, and a cylindrical through hole is arranged along the central length direction of the buckle;

the main body structure of the oil tank is cylindrical, a cylindrical shrinkage reducing section is formed after the lower end of the cylindrical body is shrunk inwards, the shrinkage reducing section is overlapped with the center of the cylindrical body, coaxial through holes with the inner diameter increased in sequence are formed in the shrinkage reducing section from inside to outside, and the bottom of the buckle is clamped at the joint of the first through hole and the second through hole in the shrinkage reducing section.

Further, the tail end of the cylindrical section and the bottom surface of the circular truncated cone section form a step, and when the connecting frame is not in sealing and inserting fit with the bulge, the circular truncated cone section is tightly propped in the opening.

Still further, the section of reducing is provided with three internal diameter through-hole that increases in proper order from inside to outside, and the end of third through-hole and second through-hole forms the ladder section, and the one end of link be with the ladder shaft form of ladder section grafting complex each other, the sealed grafting of one end of link is in the ladder section of reducing.

Preferably, the shape of the bulge is a cylinder, a pair of cylindrical positioning blocks with the same shape are fixed at the center of the height of the bulge, and the positioning blocks are symmetrically distributed along the diameter of the bulge;

the other end of link is provided with the notch cuttype through-hole with the opening intercommunication, and the degree of depth of through-hole equals bellied height, and the internal diameter equals bellied diameter, and the through-hole is equipped with a pair of draw-in groove with external intercommunication, draw-in groove is along diameter direction symmetric distribution, and the main part section of draw-in groove is rectangular form, and the bottom of main part section extends along the circumferencial direction of link and is formed with the horizontal segment, and main part section width and horizontal segment height equals the diameter of locating piece, and the locating piece slides and sets up in the horizontal segment of draw-in groove.

Preferably, a first sealing gasket is arranged at the bottom of the through hole, the inner diameter of the first sealing gasket is equal to the inner diameter of the opening, the outer diameter of the first sealing gasket is equal to the inner diameter of the through hole, the tail ends of the bulges are in contact with the first sealing gasket, and the first sealing gasket is in a compressed state;

and a second sealing gasket is sleeved at the position of the circular table section corresponding to the opening, and the second sealing gasket is in a compressed state.

Preferably, the height of the hollow area of the oil storage plate is 3-5 mm.

Preferably, the bristles comprise outer bristles and inner brushes, the outer bristles and the inner brushes are distributed on the lower end face of the oil storage plate in an array manner, and the outer bristles are positioned at the edge of the oil storage plate;

the outer brush hair is evenly provided with the oil outlet along the direction of self height, and the inner brush hair is evenly provided with the oil outlet along the position below 1/10 of self height.

Further, the diameters of the oil outlet holes on the outer bristle and the inner bristle are 0.4-0.6 mm, the oil outlet holes are distributed on the outer bristle and the inner bristle layer by layer, the oil outlet holes between the upper layer and the lower layer are distributed in a staggered way, and 4-5 oil outlet holes are distributed on each layer of the outer bristle and the inner bristle.

Further, when the oil storage plate is circular, the outer bristles and the inner brushes are respectively distributed along the circumferential direction, two layers of outer bristles are arranged at the edge of the oil storage plate, the lengths of the outer bristles positioned at the inner side are the same as those of the inner brushes, and the lengths of the outer bristles positioned at the outer side are 1/4-1/3 of those of the inner brushes.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the device for brushing the concrete mold release oil, the oil tank can store the release oil, the servo motor can push the piston in the oil tank to push the release oil into the connecting assembly from the oil tank, and then the release oil is extruded into the hairbrush through the oil plug, so that air in the hairbrush is discharged from the oil outlet on the hairbrush. The hairbrush is put into the concrete mold, so that the servo motor runs, the servo motor controls the oil outlet amount and the oil outlet rate of the parting oil every time by controlling the pushing rate and the time of the piston, the parting oil enters the oil storage plate through the oil plug and is sprayed out from the oil outlet holes of the brush hair, and the hairbrush is uniformly coated on the inner wall of the concrete mold, so that the coating efficiency of the parting oil is improved, the coating amount of the parting oil is accurately controlled, the problem of low efficiency of the current coating of the parting oil is solved, the overlong exposure time of the parting oil in the air is avoided, the demoulding efficiency of a later test piece is improved, and the time is saved. If the connecting assembly is used for a long time, when the connecting assembly is blocked or leaked, the connecting assembly can be detached from the oil tank and the hairbrush for inspection, and the buckle, the hole plug and the connecting frame can be dredged or replaced. The hairbrush has various patterns according to different concrete specimen molds, can be replaced according to the needs, and can meet the requirements of brushing various concrete mold release oils.

Drawings

Fig. 1 is a schematic view of the structure of the device according to the present utility model.

Fig. 2 is a top view of the brush of fig. 1.

Fig. 3 is a front view of the first bristle of fig. 2.

Fig. 4 is a front view of the second bristle of fig. 2.

Fig. 5 is a schematic view of the combination of the tank and the connection assembly of fig. 1.

Fig. 6 is a schematic view of the brush of fig. 1.

Fig. 7 is a schematic view of the structure of the oil suction nozzle.

Fig. 8 is a schematic structural view of the first brush body.

Fig. 9 is a schematic structural view of the second brush body.

Fig. 10 is a schematic structural view of a third brush body.

Fig. 11 is a schematic structural view of a fourth brush body.

Fig. 12 is a top view of a fifth brush body.

Fig. 13 is a front view of the fifth brush body.

In the figure: 1-a servo motor; 2-an oil tank; a 3-connection assembly; 4-hairbrush; 5-a first brush body; 6-a second brush body; 7-a third brush body; 8-a fourth brush body; 9-a fifth brush body; 10-an oil suction nozzle; 11-connecting plates; 12-a telescopic rod; 13-a piston; 21-a reduction section; 31-a buckle; 32-a compression spring; 33-hole plugs; 34-a connecting frame; 341-opening; 342-a through hole; 41-an oil storage plate; 42-brushing; 43-bump; 431-positioning blocks; 44-oil plug; 411-outer bristles; 412-inner bristles.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples, which are given by way of illustration and not limitation, to which the utility model is not limited.

According to the device for brushing the concrete mold release oil, as shown in fig. 1, a servo motor 1 is arranged at the top, and the servo motor 1 is hermetically connected with an oil tank 2 through a connecting plate 11 at the lower end of the servo motor 1. In order to show the upper end surface of the oil tank 2, the connecting plate 11 is not placed in the center of the upper end surface of the oil tank 2 in fig. 1, and the top of the oil tank 2 has a certain thickness, and the oil tank 2 is connected with the brush 4 through the connecting component 3. Specifically, the lower end of the telescopic rod 12 of the servo motor 1 is fixedly connected with a piston 13 in the oil tank 2, and the cross section shape of the piston 13 is the same as that of the oil tank 2. The servo motor 1 controls the oil output and the oil output rate by controlling the pushing rate of the piston 13, and the oil tank 2 stores the mold release oil.

As shown in fig. 5, the connection assembly 3 includes a hollow buckle 31, an annular and hollow connection frame 34, a pressure spring 32 and a solid hole plug 33, the buckle 31 is inserted in the outlet of the oil tank 2, one end of the connection frame 34 is in sealing insertion fit with the lower end of the oil tank 2, the longitudinal section of the buckle 31 is T-shaped, a cylindrical through hole is formed along the central length direction of the buckle 31, one end of the pressure spring 32 is sleeved on one side (i.e. the cylindrical end) of the buckle 31 far away from the outlet of the oil tank 2, an opening 341 is formed at the position, corresponding to the other end of the pressure spring 32, of the connection frame 34, the hole plug 33 includes a cylindrical section and a round table section which are integrally structured, a step is formed between the end of the cylindrical section and the bottom surface of the round table section, the other end of the pressure spring 32 is sleeved on the cylindrical section, and the pressure spring 32 is in a compressed state. As shown in fig. 6, a hollow protrusion 43 is disposed on one side of the oil storage plate 41 far away from the brush hair 42, the protrusion 43 is in sealing and plugging fit with the other end of the connecting frame 34, an oil through plug 44 is disposed on the outer side of the protrusion 43, holes are uniformly distributed on the oil through plug 44, the oil through plug 44 is tightly propped against the outer side of the circular truncated cone section through an opening 341, a gap is reserved between the circular truncated cone section and the opening 341, and release oil can flow into the oil through plug 44 from the connecting frame 34 conveniently. When the connecting frame 34 is not in sealing plug-in fit with the protrusion 43, the truncated cone section is propped against the opening 341, and a sealing gasket is sleeved at the position of the truncated cone section corresponding to the opening 341, so that the sealing gasket is in a compressed state, and oil leakage of the oil tank 2 when the brush is replaced or when the brush is not installed can be avoided.

Specifically, the main structure of the oil tank 2 is cylindrical, the lower end of the main structure is contracted inwards to form a shrinkage reducing section 21, the shrinkage reducing section 21 is cylindrical, the centers of the main structures of the shrinkage reducing section 21 and the oil tank 2 are overlapped, the shrinkage reducing section 21 is provided with coaxial through holes with three inner diameters sequentially increased from inside to outside, and the base of the buckle 31 is clamped in a step formed by the first through hole and the second through hole of the shrinkage reducing section 21.

For the sealing plug-in fit of the connecting frame 34 with the oil tank 2, among the three through holes with sequentially increased inner diameters mentioned above, the ends of the third through hole and the second through hole (sequentially arranged from inside to outside) also form a stepped section, and one end of the connecting frame 34 is in a stepped shaft shape in plug-in fit with the stepped section, so that one end of the connecting frame 34 can be plugged in the stepped section of the reduction section 21 in a sealing manner. As can be seen from fig. 5, for a specific sealing plug-in engagement of the projections 43 with the connecting carrier 34. The boss 43 is cylindrical, and a pair of cylindrical positioning blocks 431 with the same size are fixed at the position of the height center of the boss 43, and the positioning blocks 431 are symmetrically distributed along the diameter of the boss 43. The other end of the connecting frame 34 is provided with a stepped through hole 342 communicated with the opening 341, the depth of the through hole 342 is equal to the height of the protrusion 43, the inner diameter of the through hole 342 is also equal to the diameter of the protrusion 43, a pair of clamping grooves communicated with the outside are formed in the through hole 342, the clamping grooves are symmetrically distributed along the diameter direction of the protrusion 43, the main structure of the clamping groove is in a long strip shape, the bottom of the clamping groove extends along the circumferential direction of the connecting frame 34, the two dimensions are equal to the diameter of the positioning block 431, a sealing gasket is placed at the bottom of the through hole 342, the inner diameter is equal to the inner diameter of the opening 341, the outer diameter is equal to the inner diameter of the through hole 342, the tail end of the protrusion 43 can be in contact with the sealing gasket, and meanwhile the sealing gasket is in a compressed state, so that the positioning block 431 can slide in the horizontal section of the clamping groove to fix and seal the relative positions of the protrusion 43 and the connecting frame 34.

The brush 4 comprises a brush body and a protruding part, the brush body is an oil storage plate 41 shown in fig. 2 and bristles 42 made of PVC, the oil storage plate 41 is of a hollow structure, the hollow area is of a cuboid, the protruding part is a bulge 43 and an oil through plug 44, the height of the hollow area of the oil storage plate 41 is 3-5 mm, and waste caused by a large amount of mold release oil in the oil storage plate 41 after the mold release oil is coated and removed from the brush 4 can be avoided. The bristles 42 include outer bristles 411 and inner bristles 412, and the lower end of the oil storage plate 41 communicates with the bristles 42 at a position corresponding to a hollow area, the cross section of the hollow area of the oil storage plate 41 being the same as that of a concrete mold to be painted. As shown in fig. 2, the outer bristles 411 and the inner bristles 412 are uniformly distributed on the lower end surface of the oil storage plate 41 in an array, and the outer bristles 411 are positioned at the edge of the oil storage plate 41.

The outer diameter of the outer bristle 411 and the inner bristle 412 is 2mm. As shown in fig. 3, the outer brush 411 has oil outlet holes with a diameter of 0.4-0.6 mm distributed layer by layer, 4-5 oil outlet holes distributed in each layer, and two adjacent layers above and below are staggered, and mainly brushes the side wall of the die. As shown in FIG. 4, the inner brush 412 has only oil outlet holes with the diameter of 0.4-0.6 mm distributed layer by layer below 1/10 of the total height of the bottom, 4-5 oil outlet holes are distributed in each layer, and two adjacent layers are staggered up and down, and the bottom of the die is mainly coated.

The oil reservoir 41 and the bristles 42 (i.e., brush bodies) may be replaced with corresponding shapes and sizes according to the shapes and sizes of the concrete molds. The specific shape and size of the brush body are generally five, the first brush body 5 is shown in fig. 8, the oil storage plate 41 is square, and the side length is 150mm. The second brush 6 shown in fig. 9 has a rectangular shape, and the oil reservoir plate 41 has a length of 550mm and a width of 150mm. Fig. 10 shows a third brush body 7, and the oil storage plate 41 has a rectangular shape formed by three squares, each square having a side length of 100mm. Fig. 11 shows a fourth brush body 8, in which the oil reservoir plate 41 has a rectangular shape formed by three squares, each square having a side length of 70.7mm. The fifth brush body 9 is shown in fig. 12 and 13, the oil storage plate 41 is circular in shape and 185mm in diameter, and unlike the other four brush bodies, the outer bristles 411 and the inner bristles 412 are respectively distributed in the circumferential direction, the outer bristles 411 have two layers at the edge of the oil storage plate 41, the inner outer bristles 411 and the inner bristles 412 have the same length and 150mm, and the inner outer bristles 411 have a diameter of 175mm. The length of the outer bristles 411 positioned at the outer side is 1/4 to 1/3 of the length of the inner bristles 412.

As shown in fig. 7, as a preferable way of filling the oil tank 2, the present utility model fully utilizes the structure of the connection assembly 3, designs a suction nozzle 10, and the rest structure is the same as the protruding part of the brush 4 except the suction pipe part at the lower end of the suction nozzle 10, so that the suction nozzle 10 can be connected to the connection assembly 3 in the same way, and the piston 13 in the oil tank 2 is controlled by the servo motor 1 to suck the release oil into the oil tank 2, thereby conveniently and rapidly filling the oil tank 2.

According to the utility model, the pushing speed of the piston 13 in the oil tank 2 is controlled by the telescopic rod 12 of the servo motor 1, and the demolding oil enters the connecting component 3 from the oil tank 2 under the pushing of the piston 13 in the oil tank 2, and as the hole plug 33 is pushed away by the oil through plug 44 when the connection relation between the connecting component 3 and the hairbrush 4 is described, the demolding oil can enter the oil storage plate 41 through the holes distributed on the oil through plug 44 and then be sprayed out from the oil outlet holes of the brush hair 42 and uniformly coated on the inner wall of the concrete mold. When the mold stripping oil needs to be coated on different concrete molds, the corresponding hairbrushes 4 of different types of brush bodies are replaced. When the hairbrush 4 is taken down, the pressure spring 32 can push the hole plug 33 to block the connecting assembly 3, so that oil leakage is avoided.

The utility model relates to a device for brushing concrete mold release oil, which comprises the following specific steps:

step 1, installing a connecting assembly 3 on an oil tank 2, firstly installing an oil suction nozzle 10 on the connecting assembly 3, pushing a piston 13 in the oil tank 2 through a servo motor 1 to discharge air in the oil tank 2, then extending a suction pipe at the lower end of the oil suction nozzle 10 into the demolding oil, and pulling the piston 13 in the oil tank 2 through the servo motor 1 to suck the demolding oil into the oil tank 2.

And 2, selecting a corresponding hairbrush according to a required concrete mould to replace the oil suction nozzle 10. After the brush 4 is connected, the piston 13 in the oil tank 2 is pushed by the servo motor 1 to squeeze the demolding oil into the brush 4, so that air in the brush 4 is discharged from the oil outlet holes on the brush hair 42.

Step 3, setting the speed and time for pushing the piston 13 in the oil tank 2 at the servo motor 1, controlling the oil output and the oil output speed each time, putting the hairbrush 42 into a concrete mold, enabling the servo motor 1 to operate, and uniformly spraying the demolding oil on the inner wall and the bottom of the mold through the oil output holes on the outer hairbrush 411 and the inner hairbrush 412.

And 4, when the hairbrush is replaced, the air in the hairbrush is exhausted according to the step 2, and then the operation of the step 3 is repeated.

And 5, detaching the hairbrush after finishing brushing the demolding oil, wherein the oil tank 2 and the connecting assembly 3 are structurally sealed, the demolding oil in the oil tank 2 can be stored for a long time if not used, the demolding oil does not need to be discharged and stored, and the step 1 can be skipped for the next use.

And 6, the parts of the connecting assembly 3 can be detached and replaced, and if the oil tank 2 and the hairbrush 4 are blocked or leaked, the connecting assembly 3 can be detached and inspected, and the buckle 31, the hole plug 33, the connecting frame 34 and the sealing gasket are dredged or replaced.

Claims (10)

1. The device for brushing the concrete mold release oil is characterized by comprising a servo motor (1), an oil tank (2), a connecting component (3) and a brush (4);

the servo motor (1) is in sealing connection with the oil tank (2), a piston (13) with the same cross section shape as the oil tank (2) is arranged in the oil tank (2), the lower end of a telescopic rod (12) of the servo motor (1) is fixedly connected with the piston (13), the connecting component (3) comprises a hole plug (33), a pressure spring (32), an annular and hollow connecting frame (34) and a buckle (31) with a hollow structure, the buckle (31) is inserted at the outlet of the oil tank (2), and one end of the connecting frame (34) is in sealing insertion fit with the lower end of the oil tank (2);

one end of the pressure spring (32) is sleeved on one side, far away from the outlet of the oil tank (2), of the buckle (31), an opening (341) is formed in a position, corresponding to the other end of the pressure spring (32), of the connecting frame (34), the hole plug (33) comprises a cylindrical section and a round platform section which are of an integral structure, a ladder is formed between the tail end of the cylindrical section and the round platform section, the other end of the pressure spring (32) is sleeved on the cylindrical section, and the pressure spring (32) is in a compressed state;

the brush (4) comprises bristles (42) and a hollow oil storage plate (41), the hollow area of the oil storage plate (41) is cuboid, the lower end of the oil storage plate (41) is communicated with the bristles (42) in a position corresponding to the hollow area, oil outlets are formed in the bristles (42), the cross section of the hollow area of the oil storage plate (41) is identical to the cross section of a concrete mold to be painted, the bristles (42) are uniformly distributed on the lower end face of the oil storage plate (41), a protrusion (43) of a hollow structure is arranged on one side, far away from the bristles (42), of the oil storage plate (41), the protrusion (43) is in sealing and inserting fit with the other end of the connecting frame (34), an oil through plug (44) is arranged on the outer side of the protrusion (43), the oil through opening (341) is tightly propped against the outer side of the circular table section, and a gap is reserved between the circular table section and the opening (341).

2. The device for brushing concrete mold release oil according to claim 1, characterized in that the longitudinal section of the buckle (31) is T-shaped, and a cylindrical through hole is provided along the central length direction of the buckle (31) itself;

the main body structure of the oil tank (2) is cylindrical, a cylindrical shrinkage reducing section (21) is formed after the lower end of the cylindrical body is shrunk inwards, the shrinkage reducing section (21) is overlapped with the center of the cylindrical body, coaxial through holes with the inner diameter increased in sequence are arranged on the shrinkage reducing section (21) from inside to outside, and the bottom of the buckle (31) is clamped at the joint of the first through hole and the second through hole in the shrinkage reducing section (21).

3. Device for brushing concrete mould release oil according to claim 2, characterised in that the ends of the cylindrical sections and the bottom surface of the truncated cone sections form a step, which truncated cone sections are pressed against the opening (341) when the connecting frame (34) is not in sealing plug-in engagement with the projections (43).

4. Device for brushing concrete mould release oil according to claim 2, characterized in that the reduction section (21) is provided with three through holes with sequentially increasing inner diameters from inside to outside, the ends of the third through hole and the second through hole form a stepped section, one end of the connecting frame (34) is in a stepped shaft shape which is mutually inserted and matched with the stepped section, and one end of the connecting frame (34) is inserted and connected in the stepped section of the reduction section (21) in a sealing way.

5. The device for brushing concrete mold release oil according to claim 1, characterized in that the shape of the protrusion (43) is a cylinder, a pair of cylindrical positioning blocks (431) with the same shape are fixed at the center of height of the protrusion (43), and the positioning blocks (431) are symmetrically distributed along the diameter of the protrusion (43);

the other end of link (34) is provided with ladder type through-hole (342) with opening (341) intercommunication, and the degree of depth of through-hole (342) equals the height of protruding (43), and the internal diameter equals the diameter of protruding (43), and through-hole (342) are equipped with a pair of draw-in groove with external intercommunication, draw-in groove along the direction symmetric distribution of diameter, and the main part section of draw-in groove is rectangular form, and the bottom of main part section is formed with the horizontal segment along the circumferencial direction extension of link (34), and main part section width and horizontal segment height equals the diameter of locating piece (431), and locating piece (431) slip setting is in the horizontal segment of draw-in groove.

6. The device for brushing the mold release oil of a concrete mold according to claim 3 or claim 5, characterized in that the bottom of the through hole (342) is provided with a first gasket having an inner diameter equal to the inner diameter of the opening (341) and an outer diameter equal to the inner diameter of the through hole (342), the tip of the protrusion (43) being disposed in contact with the first gasket, the first gasket being in a compressed state;

the circular table section is sleeved with a second sealing gasket at a position corresponding to the opening (341), and the second sealing gasket is in a compressed state.

7. Device for brushing concrete mould release oil according to claim 1, characterised in that the height of the hollow area of the oil reservoir plate (41) is 3-5 mm.

8. The device for brushing the mold release oil of the concrete mold according to claim 1, wherein the brush hair (42) comprises an outer brush hair (411) and an inner brush hair (412), the outer brush hair (411) and the inner brush hair (412) are distributed on the lower end face of the oil storage plate (41) in an array manner, and the outer brush hair (411) is positioned at the edge of the oil storage plate (41);

the outer brush hair (411) is evenly provided with oil outlet holes along the height direction of the outer brush hair, and the inner brush hair (412) is evenly provided with oil outlet holes along the position below 1/10 of the height of the inner brush hair.

9. The device for brushing concrete mold release oil according to claim 8, wherein the diameters of the oil outlet holes on the outer bristle (411) and the inner bristle (412) are 0.4-0.6 mm, the oil outlet holes are distributed on the outer bristle (411) and the inner bristle (412) layer by layer, the oil outlet holes between the upper adjacent layer and the lower adjacent layer are distributed in a staggered manner, and 4-5 oil outlet holes are distributed on each layer of the outer bristle (411) and the inner bristle (412).

10. The apparatus for brushing concrete mold release oil according to claim 9, wherein when said oil reservoir plate (41) is circular, the outer bristles (411) and the inner bristles (412) are each circumferentially distributed, and the outer bristles (411) are disposed on the oil reservoir plate (41)

Two layers are arranged at the edge, the length of the outer brush hair (411) positioned at the inner side is the same as that of the inner brush hair (412),

the length of the outer brush hair (411) positioned on the outer side is 1/4-1/3 of the length of the inner brush hair (412).