CN108035551B

CN108035551B - High-efficiency concrete vibrator

Info

Publication number: CN108035551B
Application number: CN201711432362.8A
Authority: CN
Inventors: 唐艳芳; 马人欢
Original assignee: Individual
Current assignee: Tang Yanfang
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2020-06-05
Anticipated expiration: 2037-12-26
Also published as: CN108035551A

Abstract

The invention provides a powerful concrete vibrator, which comprises a rod-shaped base shell made of non-ferromagnetic materials; a central rotating shaft is arranged in the base shell along the axis of the base shell and is driven to rotate by a flexible shaft outside the base shell; a sliding groove is formed in the central rotating shaft along a bus, and a ferromagnetic counterweight sliding block capable of sliding linearly along the sliding groove is matched in the sliding groove; the two ends of the central rotating shaft are respectively provided with an end electromagnet, the electromagnets are coupled with the control module together, and the control module is at most connected with one end electromagnet at the same time. The vibrator can output vibration waves in a wider space range in the working process, has larger vibration amplitude, and is favorable for improving the concrete vibrating efficiency.

Description

High-efficiency concrete vibrator

Technical Field

The invention relates to the field of building construction tools, in particular to a concrete vibrator.

Background

In the construction process of a building, cast-in-place concrete needs to be vibrated so as to make the internal texture of the concrete uniform and eliminate internal air bubbles. The existing concrete vibrator mainly comprises a vibrating rod, an eccentric mechanism is arranged in the vibrating rod, and the eccentric mechanism is driven by a driving flexible shaft outside the vibrating rod, so that transverse vibrating mechanical waves are generated.

A common eccentric mechanism comprises a rotating shaft driven by a driving flexible shaft, wherein a balancing weight is fixed on one side of the rotating shaft along a bus, and transverse mechanical waves are generated by the rotation of the balancing weight; however, the mechanical wave form generated by the vibrator is fixed, stable energy can be transmitted only in a limited direction, the transmission range of the vibration wave is limited, and the vibration amplitude is limited, so that the vibration efficiency is limited.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a powerful concrete vibrator, which can output vibration waves in a wider spatial range during operation, has a larger vibration amplitude, and is beneficial to improving the concrete vibrating efficiency.

The technical scheme adopted by the invention for solving the technical problems is as follows: the powerful concrete vibrator comprises a rod-shaped base shell made of non-ferromagnetic materials; a central rotating shaft is arranged in the base shell along the axis of the base shell and is driven to rotate by a flexible shaft outside the base shell; a sliding groove is formed in the central rotating shaft along a bus, and a ferromagnetic counterweight sliding block capable of sliding linearly along the sliding groove is matched in the sliding groove; the two ends of the central rotating shaft are respectively provided with an end electromagnet, the electromagnets are coupled with the control module together, and the control module is at most connected with one end electromagnet at the same time.

Preferably, the base shell is made of stainless steel or copper.

Preferably, the two ends of the counterweight sliding block are respectively provided with a supporting spring, so that when the counterweight sliding block impacts the end part of the central rotating shaft, kinetic energy is stored by the supporting springs without great loss, and the end part electromagnet and the counterweight sliding block are protected.

Preferably, the control module alternately energizes the two end electromagnets during operation to cause the counterweight sliding block to slide back and forth between the two ends of the central rotating shaft.

Preferably, a friction force is formed between the counterweight sliding block and the sliding groove of the central rotating shaft, the friction force is greater than the weight of the counterweight sliding block and smaller than the magnetic attraction force of the end electromagnets to the counterweight sliding block, so that the counterweight sliding block can be stabilized at a fixed position after the end electromagnets are powered off.

Preferably, rotating shaft electromagnets are uniformly distributed in the central rotating shaft along the axial direction, and concave holes are formed in the positions, opposite to the rotating shaft electromagnets, of the bottom of the sliding chute; a sliding block hole which is right opposite to the bottom of the sliding groove is formed in the center of the counterweight sliding block, a positioning pin is restrained in the sliding block hole through a tension spring, and the positioning pin is restrained in the sliding block hole through the tension spring when the rotating shaft electromagnet which is right opposite to the positioning pin is powered off in the working process of the vibrator; when the rotating shaft electromagnet right opposite to the positioning pin is electrified, the positioning pin is pulled out of the sliding block hole by magnetic attraction to enter the concave hole at the bottom of the sliding chute, so that the counterweight sliding block is axially locked and cannot transversely move; to facilitate stabilizing the weight slide in a fixed position when desired.

The invention has the beneficial effects that: this vibrator is in the course of the work, through control the switching on and off of electromagnet can make the counter weight slider makes a round trip to slide along central pivot, makes the energy component continuous variation of vibration wave at base shell both ends, if, when the counter weight slider slides central pivot outer end, the vibration of base shell outer end is greater than base shell inner, and when the counter weight slider slides central pivot inner, the vibration of base shell inner is greater than base shell outer end, thereby make the base shell around axis circumference vibration simultaneously, have the swing around the axis center concurrently, so that the vibration wave has broader propagation angle, and make the whole amplitude increase of base shell, in order to do benefit to and improve the effect of vibrating.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the strong concrete vibrator.

Fig. 2 is a schematic structural diagram of a second embodiment of the strong concrete vibrator.

Detailed Description

The invention is further illustrated with reference to the following figures and examples:

the first embodiment is as follows:

in the first embodiment shown in fig. 1, the powerful concrete vibrator comprises a rod-shaped base shell 1 made of a non-ferromagnetic material; a central rotating shaft 2 is arranged in the base shell 1 along the axis of the base shell, and the central rotating shaft 2 is driven to rotate by a flexible shaft 3 outside the base shell; a chute 20 is formed in the central rotating shaft 2 along a bus, and a ferromagnetic counterweight sliding block 4 capable of sliding linearly along the chute is matched in the chute 20; two ends of the central rotating shaft 2 are respectively provided with an end electromagnet 5a and an end electromagnet 5b, the

electromagnets

5a and 5b are commonly coupled with a control module (not shown), and the control module is connected with at most one end electromagnet at the same time.

In the vibrator, the base shell 1 is made of stainless steel or copper. The two ends of the weight slider 4 are respectively provided with a supporting spring 41, so that when the weight slider 4 impacts the end of the central rotating shaft 2, the kinetic energy is stored by the supporting springs 41 without being greatly lost, and meanwhile, the

end electromagnets

5a and 5b and the weight slider 4 are protected. The control module can alternately energize the two

end electromagnets

5a and 5b during operation to cause the counterweight sliding block 4 to slide back and forth between the two ends of the central rotating shaft 2.

In the vibrator according to the first embodiment, during operation, by controlling the power on and off of the

electromagnets

5a and 5b, the counterweight slider 4 can slide back and forth along the central rotating shaft 2, so that the energy components of the vibration waves at the two ends of the base shell 1 continuously change, for example, when the counterweight slider 4 slides to the outer end of the central rotating shaft 2, the vibration at the outer end of the base shell 1 is larger than that at the inner end of the base shell 1, and when the counterweight slider 4 slides to the inner end of the central rotating shaft 2, the vibration at the inner end of the base shell 1 is larger than that at the outer end of the base shell 1, so that the base shell 1 can oscillate around the axis while vibrating circumferentially around the axis, so that the vibration waves have wider propagation angles, and the overall amplitude of the base shell 1 is increased, thereby facilitating the improvement of the vibration effect.

In a concrete vibrating process, sometimes a vibrating wave with a stable output direction of the vibrator is required, at this time, for the vibrator in the first embodiment, a sliding friction force may be provided between the counterweight sliding block 4 and the sliding groove 20 of the central rotating shaft 2, the friction force is greater than the weight of the counterweight sliding block 4 and smaller than the magnetic attraction force of the

end electromagnets

5a and 5b to the counterweight sliding block 4, so that after the counterweight sliding block 4 is pulled to a required position by the

end electromagnets

5a and 5b, the end electromagnets are powered off again, and the counterweight sliding block 4 can be stabilized at a fixed position.

However, the above scheme of stabilizing the weight slider 4 at a fixed position will lose much friction energy during the back-and-forth sliding of the weight slider 4; to solve this problem, the present invention provides the second embodiment shown in fig. 2:

for the second embodiment shown in fig. 2, it is different from the first embodiment: rotating shaft electromagnets 6 are uniformly distributed in the central rotating shaft 2 along the axial direction, and concave holes 200 are formed at the positions, opposite to the rotating shaft electromagnets 6, of the bottom of the sliding chute 20; a sliding block hole which is right opposite to the bottom of the sliding chute 20 is formed in the center of the counterweight sliding block 4, a positioning pin 43 is constrained in the sliding block hole through a tension spring 42, and in the working process of the vibrator, when the rotating shaft electromagnet 6 which is right opposite to the positioning pin 43 is powered off, the positioning pin 43 is constrained in the sliding block hole through the tension spring 42; when the rotating shaft electromagnet 6 opposite to the positioning pin 43 is electrified, the positioning pin 43 is pulled out of the sliding block hole by magnetic attraction force and enters the concave hole 200 at the bottom of the sliding chute, so that the counterweight sliding block 4 is axially locked and cannot transversely move; in order to stabilize the weight slide 4 in a fixed position when needed.

According to the second embodiment, the sliding block 4 and the sliding groove 20 can be smoothly matched, so that extremely small sliding friction is kept between the sliding block and the sliding groove, and the energy loss is extremely small in the process of sliding the counterweight sliding block 4 back and forth; when the counterweight sliding block 4 needs to be positioned, the counterweight sliding block 4 can be stabilized by less exciting current.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

Claims

1. A powerful concrete vibrator comprises a rod-shaped base shell (1) made of a non-ferromagnetic material; a central rotating shaft (2) is arranged in the base shell (1) along the axis of the base shell, and the central rotating shaft (2) is driven to rotate by a flexible shaft outside the base shell (1); the method is characterized in that: a chute (20) is formed in the central rotating shaft (2) along a bus, and a ferromagnetic counterweight sliding block (4) capable of sliding linearly along the chute is matched in the chute (20); two ends of the central rotating shaft (2) are respectively provided with an end electromagnet (5 a, 5 b), each end electromagnet is commonly coupled with the control module, and the control module is at most connected with one end electromagnet at the same moment.

2. The powerful concrete vibrator according to claim 1, wherein: the base shell (1) is made of stainless steel or copper.

3. The powerful concrete vibrator according to claim 1, wherein: and two ends of the counterweight sliding block (4) are respectively provided with a supporting spring (41), so that when the counterweight sliding block (4) impacts the end part of the central rotating shaft (2), kinetic energy is stored by the supporting springs (41).

4. The powerful concrete vibrator according to any one of claims 1 to 3, wherein: when the control module works, the two end electromagnets (5 a and 5 b) are alternately electrified, so that the counterweight sliding block (4) slides back and forth between the two ends of the central rotating shaft (2).

5. The powerful concrete vibrator according to any one of claims 1 to 3, wherein: and friction force is arranged between the counterweight sliding block (4) and the sliding chute (20) of the central rotating shaft (2), and the friction force is greater than the weight of the counterweight sliding block (4) and smaller than the magnetic attraction force of the end electromagnets (5 a and 5 b) to the counterweight sliding block (4), so that the counterweight sliding block (4) can be stabilized at a fixed position after the end electromagnets are powered down.

6. The powerful concrete vibrator according to any one of claims 1 to 3, wherein: rotating shaft electromagnets (6) are uniformly distributed in the central rotating shaft (2) along the axial direction, and concave holes (200) are formed in the positions, opposite to the rotating shaft electromagnets (6), of the bottom of the sliding chute (20); a slider hole which is right opposite to the bottom of the sliding chute (20) is formed in the center of the counterweight slider (4), a positioning pin (43) is constrained in the slider hole through a tension spring (42), and in the working process of the vibrator, when the rotating shaft electromagnet (6) which is right opposite to the positioning pin (43) is powered off, the positioning pin (43) is constrained in the slider hole through the tension spring (42); when the rotating shaft electromagnet (6) right opposite to the positioning pin (43) is electrified, the positioning pin (43) is pulled out of the sliding block hole by magnetic attraction force and enters the concave hole (200) at the bottom of the sliding groove, so that the counterweight sliding block (4) is axially locked and cannot transversely move.