An adjustable hydraulic pin support capable of transmitting bending moment

Abstract

An adjustable hydraulic pin bearing capable of transmitting bending moment belongs to the technical field of pin bearings, comprising a base, a lower ear plate symmetrically arranged in the middle of the upper surface of the base, an upper ear plate vertically hinged between the lower ear plates by means of a pin, and an upper cover plate matched with the upper end surface of the upper ear plate, a hydraulic telescopic mechanism is provided at each of the four corners of the base, the top of the hydraulic telescopic mechanism is respectively hingedly connected to the lower end surface of the upper cover plate, the hydraulic telescopic mechanism is divided into two groups, front and rear, in the direction of rotation of the upper ear plate, each group of hydraulic telescopic mechanisms is respectively provided with an oil pipe 1, a switch valve and a pressure-stabilizing energy storage tank are sequentially arranged on the oil pipe 1 according to the oil inlet direction, the pressure-stabilizing energy storage tank is fixed on the base, and the switch valve is connected to the servo hydraulic oil pump system by means of a connector and an oil pipe 2. By improving its own structure, the pin bearing can transmit the bending moment in the bearing plane, thereby reducing the bending moment in the middle of the truss or beam, and it itself has a strong energy dissipation and shock absorption capacity, and greater bending and shear resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of pin shaft supports, and in particular relates to an adjustable hydraulic pin shaft support capable of transmitting bending moment, which is suitable for the bottom and lateral connection of a large-span spatial building structure. Background Art

[0002] The pin support currently used is a steel structure pin support, which consists of an upper cover plate, an upper ear plate, a pin, a pair of lower ear plates and a bottom plate, and the upper and lower ear plates are hinged by a pin. The steel structure pin support can rotate freely in the direction of the support plane with the pin as the rotation axis.

[0003] The disadvantage of the above-mentioned steel structure pin support is that it is ideally hinged within the support plane and cannot transmit bending moment, so that the bending moment at the end of the truss and beam structure designed according to the simple supported beam assumption is zero, while the bending moment in the middle is the largest, resulting in material waste. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an adjustable hydraulic pin support capable of transmitting bending moment. By improving its own structure, the pin support can transmit the bending moment in the support plane, thereby reducing the bending moment in the middle of the truss or beam. It itself has strong energy dissipation and shock absorption capabilities, and greater bending and shear resistance characteristics.

[0005] The technical solution adopted by the present invention is: an adjustable hydraulic pin shaft support capable of transmitting bending moment, comprising a base, a lower ear plate symmetrically arranged in the middle of the upper surface of the base, an upper ear plate vertically hinged between the lower ear plates by means of a pin shaft, and an upper cover plate matched with the upper end surface of the upper ear plate, a hydraulic telescopic mechanism is respectively arranged at the four corners of the base, the top of the hydraulic telescopic mechanism is respectively hingedly connected to the lower end surface of the upper cover plate, the hydraulic telescopic mechanism is divided into two groups, front and rear, according to the rotation direction of the upper ear plate, each group of hydraulic telescopic mechanisms is respectively provided with an oil pipe 1, and a switch valve and a pressure-stabilizing energy storage tank are sequentially arranged on the oil pipe 1 according to the oil inlet direction, the pressure-stabilizing energy storage tank is fixed on the base, and the switch valve is connected to the servo hydraulic oil pump system by means of a connector and oil pipe 2.

[0006] Furthermore, the upper ear plate is a hollow structure with a reinforcing plate provided inside.

[0007] Furthermore, the hydraulic telescopic mechanism is a hydraulic jack.

[0008] Furthermore, a pressure sensor is provided on the oil pipe 1, and the switch valve is a quick-install electric-controlled switch valve.

[0009] Furthermore, the servo hydraulic oil pump system includes a servo control circuit, a hydraulic oil pump and an oil tank.

[0010] Furthermore, the servo control circuit includes a CPU module, a storage module connected to the CPU module, and a signal acquisition module, the signal acquisition module is connected to a pressure sensor, the CPU module is connected to an input end of a switch valve, and the switch valve is a quick-install electric-controlled switch valve.

[0011] Beneficial effects of the present invention: By adding a hydraulic telescopic mechanism, the present invention enables the pin support to transmit the bending moment in the support plane, thereby reducing the bending moment in the middle of the truss or beam, and the present invention itself has strong energy dissipation and shock absorption capabilities, and greater bending and shear resistance characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 yes Figure 1 Left view of;

[0014] Figure 3 It is the oil circuit layout diagram of the present invention;

[0015] Figure 4 It is a schematic diagram of bending moment of a simply supported beam;

[0016] Figure 5 is a schematic diagram of the beam bending moment after adding the present invention;

[0017] In the attached drawings: 1 is a base, 2 is a lower ear plate, 3 is a pin shaft, 4 is an upper ear plate, 4-1 is a reinforcing plate, 5 is an upper cover plate, 6 is a hydraulic telescopic mechanism, 7 is an oil pipe 1, 8 is a switch valve, 9 is a pressure-stabilizing energy storage tank, 10 is an oil pipe 2, 11 is a servo hydraulic oil pump system, and 13 is a pressure sensor. DETAILED DESCRIPTION

[0018] See attached Figure 1-3 , an adjustable hydraulic pin bearing capable of transmitting bending moment, comprising a base 1, a lower ear plate 2 symmetrically arranged in the middle of the upper surface of the base 1, an upper ear plate 4 vertically hinged between the lower ear plates 2 by means of a pin 3, and an upper cover plate 5 matched with the upper end surface of the upper ear plate 4, a hydraulic telescopic mechanism 6 is respectively arranged at the four corners of the base 1, the top of the hydraulic telescopic mechanism 6 is respectively hingedly connected to the lower end surface of the upper cover plate 5, the hydraulic telescopic mechanism 6 is divided into two groups, front and rear, according to the rotation direction of the upper ear plate 4, each group of hydraulic telescopic mechanism 6 is respectively provided with an oil pipe 1 7, and a switch valve 8 and a pressure-stabilizing energy storage tank 9 are sequentially arranged on the oil pipe 1 7 according to the oil inlet direction, the pressure-stabilizing energy storage tank 9 is fixed on the base 1, and the setting of the pressure-stabilizing energy storage tank 9 makes the hydraulic pressure of the hydraulic telescopic mechanism 6 basically remain unchanged under the condition of small deformation, meeting the predetermined bending moment value of the design; the switch valve 8 is connected to the servo hydraulic oil pump system 11 by means of a connector and an oil pipe 2 10. The hydraulic telescopic mechanism 6 is a hydraulic jack.

[0019] The upper ear plate 4 is a hollow structure, and a reinforcing plate 4-1 is arranged inside the upper ear plate 4. Due to the hollow structure of the upper ear plate 4 and the reinforcing plate 4-1, the bending and shearing rigidity of the upper ear plate 4 is greatly improved.

[0020] A pressure sensor 13 is provided on the oil pipe 7.

[0021] The servo hydraulic oil pump system 11 includes a servo control circuit, a hydraulic oil pump and an oil tank.

[0022] The servo control circuit includes a CPU module, a storage module connected to the CPU module, and a signal acquisition module, the signal acquisition module is connected to the pressure sensor 13, the CPU module is connected to the input end of the switch valve 8, and the switch valve 8 is a quick-install electric control switch valve.

[0023] In specific implementation, Figure 1-2 It can be seen from the embodiment shown that it includes an upper cover plate 5, an upper ear plate 4, a pair of lower ear plates 2, a pin 3 and a base 1; it also includes four hydraulic telescopic mechanisms 6 and a pair of pressure-stabilizing energy storage tanks 9; the upper ear plate 4 is a hollow structure, and a reinforcing plate 4-1 is arranged in the hollow structure, and the reinforcing plate 4-1 is located above the inner shaft hole of the upper ear plate 4, and its top is in contact with the upper cover plate 5; the upper ear plate 4 is fixed to the center of the bottom surface of the upper cover plate 5, and the pair of lower ear plates 2 are symmetrically fixed on the base 1, and the pin 3 passes through the shaft holes of the lower ear plate 2 on the right, the upper ear plate 4, and the lower ear plate 2 on the left in turn, and is fixedly connected by a pin seal plate and bolts. The top of the hydraulic telescopic mechanism 6 is hingedly connected to the upper cover plate 5, the pressure-stabilizing energy storage tank 9 is arranged on the base 1 by means of a fixing plate, the pressure-stabilizing energy storage tank 9 is connected to the oil pipe 7 by means of a short pipe, and a pressure sensor 13 and a switch valve 8 are arranged on the oil pipe 7 between the pressure-stabilizing energy storage tank 9 and the hydraulic telescopic mechanism 6, and the pressure sensor 13 is a pressure instrument; the servo hydraulic oil pump system 11 includes a servo control circuit, a hydraulic oil pump and an oil tank, and the servo hydraulic oil pump system 11 is connected to the switch valve 8 by means of a connector and an oil pipe 10, and the switch valve 8 is a quick-install switch valve; the above structure constitutes a simple embodiment of the present invention, that is, the servo hydraulic oil pump system 11 is used to supply pressure to the installed hydraulic pin Oil pressure is applied to the hydraulic telescopic mechanism 6 in the shaft support. When the pressure gauge reaches the set pressure, the servo hydraulic oil pump system 11 stops working and is removed, thereby realizing the function of setting the out-of-plane stiffness and bearing capacity of the pin support itself, and enabling the pin support of the present invention to have the ability to transmit in-plane bending moments. Its working principle is: through the micro-deformation recovery ability of the hydraulic telescopic mechanism 6 itself, when one side is compressed and deformed, the compressed side provides an upward pre-restoring force, and the other side provides a downward pre-restoring force, so that the pin support itself has the ability to transmit in-plane bending moments and micro-deformation recovery capabilities, which can reduce the bending moment in the middle of the beam or truss supported on the pin support of the present invention.

[0024] The principle of the present invention is analyzed as follows Figure 4 and 5 As shown:

[0025] Figure 4 This is the bending moment diagram of a simply supported beam. Assume that the beam is supported on two columns, the beam length is L, the beam-column joint is hinged, and the column ends are rigidly connected. The beam is subjected to a uniformly distributed vertical load of size q. At this time, the bending moment at the mid-span of the beam is 1 / 8qL 2 , the bending moment at the beam end is 0. Assume that the column is subjected to a lateral force (wind, earthquake, etc.) Figure 4 The bending moment shown is 0 at the column end and M at the column base.

[0026] like Figure 5 When the pin support of the present invention is used, the beam end bending moment is generated by setting the jack pressure, assuming that the magnitude is 1 / 16qL 2 , direction as Figure 5 As shown, the mid-span bending moment of the beam is reduced to 1 / 16qL 2 , the bending moment at the beam end is 1 / 16qL 2 The bending moment at the column end is 1 / 16qL 2 , the bending moment at the base of the column is M-1 / 16qL 2 By applying bending moment at the beam ends, the bending moment at the mid-span of the beam is reduced, the bending moment is more evenly distributed along the length of the beam, and the beam cross section is used reasonably.

[0027] For columns, since the lateral forces actually received by the structure are more complicated, Figure 5 In this case, the bending moment at the column base is also reduced, but the present invention focuses more on improving the stress condition of the beam.

[0028] On the basis of the above-mentioned simple embodiment, the switch valve 8 is replaced with a quick-install electrically controlled switch valve by changing the type of the switch valve 8; the servo hydraulic oil pump system 11 includes a servo control circuit, a hydraulic oil pump and an oil tank, the servo control circuit includes a CPU module, a storage module connected to the CPU module, and a signal acquisition module, the signal acquisition module is connected to the pressure sensor 13, the CPU module is connected to the input end of the switch valve 8, and the switch valve 8 is a quick-install electrically controlled switch valve; the improvement measures of the above-mentioned structure can make the hydraulic telescopic mechanism 6 6 When the oil pressure is less than a predetermined value due to large deformation, the servo control circuit controls the hydraulic oil pump to inject oil into the hydraulic telescopic mechanism 6, so that the oil pressure returns to the predetermined value, so that the present invention has better long-term easy maintenance performance.

Claims

1. An adjustable hydraulic pin support capable of transmitting bending moment, comprising a base (1), a lower ear plate (2) symmetrically arranged in the middle of the upper surface of the base (1), an upper ear plate (4) vertically hinged between the lower ear plates (2) by means of a pin (3), and an upper cover plate (5) matched with the upper end surface of the upper ear plate (4), characterized in that: A hydraulic telescopic mechanism (6) is provided at each of the four corners of the base (1). The top of each hydraulic telescopic mechanism (6) is hingedly connected to the lower end surface of the upper cover plate (5). The hydraulic telescopic mechanism (6) is divided into two groups, front and rear, according to the rotation direction of the upper ear plate (4). Each group of hydraulic telescopic mechanisms (6) is provided with an oil pipe (7). A switch valve (8) and a pressure-stabilizing energy storage tank (9) are provided on the oil pipe (7) in sequence according to the oil inlet direction. The pressure-stabilizing energy storage tank (9) is fixed on the base (1). The switch valve (8) is connected to a servo hydraulic oil pump system (11) by means of a connector and an oil pipe (10). The hydraulic telescopic mechanism (6) is a hydraulic jack; The servo hydraulic oil pump system (11) comprises a servo control circuit, a hydraulic oil pump and an oil tank; The servo control circuit comprises a CPU module, a storage module connected to the CPU module, and a signal acquisition module, the signal acquisition module being connected to a pressure sensor (13), the CPU module being connected to an input end of a switch valve (8), and the switch valve (8) being a quick-installation electrically controlled switch valve.

2. The adjustable hydraulic pin support capable of transmitting bending moment according to claim 1, characterized in that: The upper ear plate (4) is a hollow structure, and a reinforcing plate (4-1) is provided inside the structure.

3. The adjustable hydraulic pin support capable of transmitting bending moment according to claim 1, characterized in that: A pressure sensor (13) is provided on the oil pipe 1 (7).

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