A hoisting and lifting system with safety protection function

Abstract

The present invention discloses a hoisting and lifting system with a safety protection function, which relates to the technical field of cranes. The present invention integrates a dual mechanical and electronic alarm mechanism, and through multi-level force conduction designs such as detecting beam frames, rack drives, and permanent magnet capture of friction columns, precise alarms for the falling position of goods are achieved. The system has an independent power generation function and can still emit alarm signals without power support; at the same time, the sensitivity and safety are improved through slow pressure sensing and dynamic isolation structures. The multi-point speaker volume control technology provides precise escape guidance for construction workers, fundamentally reducing construction risks, and has remarkable practicality and innovation significance.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and specifically to a hoisting and lifting system with a safety protection function. Background Art

[0002] In fields such as construction, ports, and warehousing, hoisting and lifting systems are widely used for the transportation and handling of goods. However, existing hoisting and lifting systems have many defects in terms of safety protection when the goods fall, which easily lead to safety accidents, causing casualties and property losses. Existing hoisting and lifting systems have low safety when the goods fall. Some traditional systems only rely on electronic sensors to detect weight changes, lack safety redundancy settings and mechanical alarm mechanisms, and are prone to alarm failure due to power outages or sensor malfunctions. In addition, the alarm signals of most systems are single, and the area where the goods fall cannot be effectively located, increasing the risk of injury to construction workers. Some systems rely on external power supplies and cannot operate normally in the event of a power outage, unable to ensure comprehensive construction safety. Summary of the Invention

[0003] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: A hoisting and lifting system with a safety protection function, including a supporting beam plate, on which an auxiliary support plate is fixedly installed, and a starting motor and a generator are fixedly installed on the auxiliary support plate; wherein two parallel detection beam frame sliding rods are also fixedly installed on the supporting beam plate, and a detection beam frame is slidably arranged on the two detection beam frame sliding rods. A reset spring is wound around each detection beam frame sliding rod, and both ends of the reset spring are fixedly matched with the detection beam frame and the supporting beam plate; an extrusion sliding rod bracket is fixedly installed on the side of the detection beam frame, an extrusion sliding rod is slidably arranged on the extrusion sliding rod bracket, the bottom end of the extrusion sliding rod is fixedly provided with an extrusion plate, and a force-sensitive resistor is arranged directly below the extrusion plate. The force-sensitive resistor is lapped on the supporting beam plate. An extrusion spring is wound around the extrusion sliding rod, and both ends of the extrusion spring are fixed to the extrusion sliding rod bracket and the extrusion plate, wherein the extrusion plate is in contact extrusion cooperation with the force-sensitive resistor; it also includes at least four speakers arranged around the construction site for providing spatial audio information to personnel.

[0004] Preferably, a hoisting frame is fixedly installed on the detection beam frame, a hook connecting head is fixed at the bottom of the hoisting frame, and a hook is fixed on the hook connecting head; a positioning block is fixed on the surface of the detection beam frame facing the supporting beam plate, and the positioning block is in contact cooperation with the supporting beam plate.

[0005] Preferably, a friction passive disk and an intermediate rotating disk are also rotatably installed on the auxiliary support plate. The friction passive disk and the intermediate rotating disk are in transmission cooperation through a transmission belt. The intermediate rotating disk is fixed on the input shaft of the generator, and the friction passive disk is in rotational cooperation with the output shaft of the starting motor.

[0006] Preferably, a spline shaft is fixed on the output shaft of the starting motor, and an electromagnetic friction disc is sleeved on the spline shaft in a spline-sliding manner. The electromagnetic friction disc is in frictional transmission cooperation with the friction driven disc, and the electromagnetic friction disc is in magnetic force cooperation with the friction driven disc.

[0007] Preferably, a closed support frame is also fixed on the auxiliary support plate. The closed support frame is rotationally matched with the spline shaft and the electromagnetic friction disc to prevent the electromagnetic friction disc from slipping off the spline shaft. A gear is also rotatably installed on the closed support frame. An inner rotating block is coaxially fixed on the gear, and an outer rotating sleeve is rotatably sleeved on the outside of the inner rotating block. The middle rotating disc is fixedly matched with the outer rotating sleeve.

[0008] Preferably, at least two triangular grooves are formed on the inner rotating block. Permanent magnets are fixed at the narrow slit ends inside the triangular grooves, and the permanent magnets do not contact the outer rotating sleeve. Friction columns are magnetically cooperated with the sides of the permanent magnets. A friction column tension spring is fixed between the friction columns and the vertical planes of the triangular grooves. The longest side of the permanent magnet is smaller than the diameter of the friction column, so that the friction column cannot contact the permanent magnet when moving towards the permanent magnet.

[0009] Preferably, a rack is fixedly installed on the detection beam frame. The rack is slidably matched with the closed support frame, and the rack is in meshing transmission with the gear.

[0010] Preferably, the support beam plate is fixedly installed on the inner wall of the housing. A bottom dust cover is fixed at the bottom of the housing, and the housing is fixedly connected to the end of the steel wire rope of the crane.

[0011] Preferably, the force-sensitive resistor and a fixed-value resistor R1 are connected in series in a DC circuit, and the middle positions of the force-sensitive resistor and the fixed-value resistor R1 are sequentially connected to the negative pole of the DC power supply through a capacitor C1 and a relay coil. The middle position between the capacitor C1 and the relay coil is connected to the negative pole of the power supply through a fixed-value resistor R2.

[0012] Preferably, the capacitor C1 and the fixed-value resistor R2 are installed in a manner that is convenient for replacement. The normally open contact of the relay is used as the starting switch for the starting motor and the electromagnetic friction disc.

[0013] The present invention has the following beneficial effects compared with the prior art: (1) The present invention can quickly activate the mechanical mechanism by detecting the weight change when the goods fall, and combine the horizontal coordinate information of the goods transported by the boom to achieve the precise positioning and alarm function of the falling goods position. Utilizing the multi-point volume control function of the speaker to guide the construction personnel to quickly move away from the dangerous area, thereby significantly reducing the risk of injury to the construction personnel; (2) The present invention converts mechanical energy into electrical energy, uses the generator to output the alarm signal, and does not require external power support. Even in the case of power system failure, it can still work normally to ensure the reliability and continuity of the safety alarm; (3) When the goods fall, the mechanical and electronic dual-channel alarm mechanism is started simultaneously to ensure the efficiency and redundancy of the alarm. When the electronic part fails, the mechanical system can still trigger the alarm through the generator, greatly improving the safety and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the outer shell of the present invention.

[0015] Figure 2 It is a schematic structural diagram of the whole of the present invention.

[0016] Figure 3 It is a schematic structural diagram of the positioning block of the present invention.

[0017] Figure 4 For the present invention Figure 3 Schematic structural diagram of the position A therein.

[0018] Figure 5 It is a schematic structural diagram of the auxiliary support plate of the present invention.

[0019] Figure 6 For the present invention Figure 5 Schematic structural diagram of the position B therein.

[0020] Figure 7 It is a schematic structural diagram of the inner rotating block of the present invention.

[0021] Figure 8 For the present invention Figure 7 Schematic structural diagram of the position C therein.

[0022] Figure 9 It is a schematic structural diagram of the friction column tension spring of the present invention.

[0023] Figure 10 It is a schematic structural diagram of the spline shaft of the present invention.

[0024] Figure 11 It is a schematic diagram of the force-sensitive resistor startup principle of the present invention.

[0025] In the figure: 101 - outer shell; 102 - bottom dust cover; 103 - support beam plate; 104 - auxiliary support plate; 105 - detection beam frame sliding rod; 106 - detection beam frame; 107 - positioning block; 108 - lifting frame; 109 - return spring; 110 - extrusion slide rod support; 111 - extrusion spring; 112 - extrusion slide rod; 113 - force - sensitive resistor; 114 - starting motor; 115 - generator; 116 - closed support frame; 117 - rack; 118 - gear; 119 - inner rotating block; 120 - outer rotating sleeve; 121 - electromagnetic friction disc; 122 - friction passive disc; 123 - intermediate rotating disc; 124 - transmission belt; 125 - spline shaft; 126 - triangular groove; 127 - permanent magnet; 128 - friction column; 129 - friction column tension spring; 130 - hook connector; 131 - hook; 132 - extrusion plate. Specific embodiments

[0026] The following is combined with the attached Figure 1-11 drawings, and the technical solutions of the present invention will be further described through specific embodiments.

[0027] The present invention provides a hoisting and lifting system with a safety protection function, which includes a support beam plate 103. An auxiliary support plate 104 is fixedly installed on the support beam plate 103, and a starting motor 114 and a generator 115 are fixedly installed on the auxiliary support plate 104. Among them, two parallel detection beam frame sliding rods 105 are also fixedly installed on the support beam plate 103. A detection beam frame 106 is slidably arranged on the two detection beam frame sliding rods 105. A return spring 109 is arranged around each detection beam frame sliding rod 105, and both ends of the return spring 109 are fixedly matched with the detection beam frame 106 and the support beam plate 103. A squeezing slide rod bracket 110 is fixedly installed on the side of the detection beam frame 106. A squeezing slide rod 112 is slidably arranged on the squeezing slide rod bracket 110. A squeezing plate 132 is fixedly arranged at the bottom end of the squeezing slide rod 112. A force-sensitive resistor 113 is arranged directly below the squeezing plate 132, and the force-sensitive resistor 113 is lapped on the support beam plate 103. A squeezing spring 111 is arranged around the squeezing slide rod 112, and both ends of the squeezing spring 111 are fixed to the squeezing slide rod bracket 110 and the squeezing plate 132. Among them, the squeezing plate 132 is in contact and squeezing fit with the force-sensitive resistor 113. It also includes at least four loudspeakers arranged around the construction site for providing spatial audio information to personnel. A hoisting frame 108 is fixedly installed on the detection beam frame 106. A hook connecting head 130 is fixed at the bottom of the hoisting frame 108, and a hook 131 is fixed on the hook connecting head 130. A positioning block 107 is fixed on the side of the detection beam frame 106 facing the support beam plate 103, and the positioning block 107 is in contact and fit with the support beam plate 103. A friction passive disk 122 and an intermediate rotating disk 123 are also rotatably installed on the auxiliary support plate 104. The friction passive disk 122 and the intermediate rotating disk 123 are in transmission cooperation through a transmission belt 124. Among them, the intermediate rotating disk 123 is fixed on the input shaft of the generator 115, and the friction passive disk 122 is rotatably matched with the output shaft of the starting motor 114. A spline shaft 125 is fixed on the output shaft of the starting motor 114. An electromagnetic friction disk 121 is sleeved on the spline shaft 125 in a spline-sliding manner. The electromagnetic friction disk 121 is in friction transmission cooperation with the friction passive disk 122, and the electromagnetic friction disk 121 is in magnetic force cooperation with the friction passive disk 122.

[0028] An auxiliary support plate 104 is also fixedly provided with a closed support frame 116. The closed support frame 116 is rotationally matched with a spline shaft 125 and an electromagnetic friction disc 121, and is used to prevent the electromagnetic friction disc 121 from slipping off the spline shaft 125. A gear 118 is also rotatably installed on the closed support frame 116. An inner rotating block 119 is coaxially fixed on the gear 118. An outer rotating sleeve 120 is rotatably sleeved on the outer side of the inner rotating block 119. Among them, an intermediate rotating disc 123 is fixedly matched with the outer rotating sleeve 120. At least two triangular grooves 126 are formed on the inner rotating block 119. A permanent magnet 127 is fixed at the narrow slit end inside the triangular groove 126. The permanent magnet 127 does not contact the outer rotating sleeve 120. A friction column 128 is magnetically coupled to the side of the permanent magnet 127. A friction column tension spring 129 is fixed between the friction column 128 and the vertical plane of the triangular groove 126. Among them, the longest side of the permanent magnet 127 is smaller than the diameter of the friction column 128, so that the friction column 128 cannot contact the permanent magnet 127 when moving towards the permanent magnet 127. A rack 117 is fixedly installed on the detection beam frame 106. The rack 117 is slidably matched with the closed support frame 116, and the rack 117 is meshed with the gear 118 for transmission. A support beam plate 103 is fixedly installed on the inner wall of the housing 101. A bottom dust cover 102 is fixed at the bottom of the housing 101. The housing 101 is fixedly connected to the end of the steel wire rope of the crane.

[0029] A force-sensitive resistor 113 and a fixed-value resistor R1 are connected in series in a DC circuit. And the middle positions of the force-sensitive resistor 113 and the fixed-value resistor R1 are sequentially connected to the negative pole of the DC power supply through a capacitor C1 and a relay coil. The middle position between the capacitor C1 and the relay coil is connected to the negative pole of the power supply through a fixed-value resistor R2. The capacitor C1 and the fixed-value resistor R2 adopt an installation method that is convenient for replacement. Among them, the normally open contact of the relay serves as the start switch for the starting motor 114 and the electromagnetic friction disc 121.

[0030] The working principle of a hoisting and lifting system with a safety protection function disclosed by the present invention is as follows: Connect the housing 101 to the bottom end of the steel wire rope, and then hang the goods on the hook 131. The hook 131 applies the gravity of the goods to the hoisting frame 108 through the hook connecting head 130, and the hoisting frame 108 applies the gravity of the goods to the detection beam frame 106. The detection beam frame 106 compresses the return spring 109 and slides downward on the detection beam sliding rod 105, so that the positioning block 107 contacts the support beam plate 103, and then the detection beam frame 106 stops moving. At the same time, the pressing plate 132 also contacts the force-sensitive resistor 113. During this process, the pressing spring 111 is slowly pressed, so the pressure received by the force-sensitive resistor 113 changes slowly (when hoisting, the crane should operate slowly). At this time, the resistance value of the force-sensitive resistor 113 slowly decreases. At this time, the charging and discharging speed of the capacitor C1 is very slow and no large instantaneous current will be generated. Therefore, the coil of the relay will not generate magnetic force and will not attract the normally open contact.

[0031] Meanwhile, detecting the movement of the beam frame 106 will also drive the movement of the rack 117. The rack 117 drives the gear 118 to rotate, and the gear 118 drives the inner rotating block 119 to rotate. At this time, the rack 117 moves downward, and both the inner rotating block 119 and the gear 118 rotate slowly. Moreover, the frictional force received by the friction column 128 inside the triangular groove 126 is also in the direction away from the permanent magnet 127. When the suspended heavy object falls from the hook 131, in order to prevent the goods from hitting the construction workers below, an alarm needs to be issued. The swing angle of the crane's boom and the horizontal position of the transported goods can both be known from the operation data of the crane. Therefore, at least four speakers only need to be set around the hoisting range of the crane. When the goods fall, the system controls the pronunciation volume of the four speakers according to the horizontal coordinates at the time of falling, making the sound at the falling position louder. When the construction workers below hear the sound, they will subconsciously run in the direction away from the sound source, thus reducing the risk of being hit by the goods.

[0032] Specifically, when the goods fall, the weight on the hook 131 will rapidly decrease, and then the detection beam frame 106 will quickly reset under the elastic force of the return spring 109. The rapid movement of the detection beam frame 106 will drive the rapid movement of the rack 117. The rack 117 drives the gear 118 to rotate rapidly, and the gear 118 drives the inner rotating block 119 to rotate rapidly. At this time, the rotation of the inner rotating block 119 will cause the friction column 128 inside the triangular groove 126 to move towards the permanent magnet 127. Then, the friction column 128 is captured by the magnetic force of the permanent magnet 127 (the magnetic force between the permanent magnet 127 and the friction column 128 is slightly greater than the maximum tensile force of the friction column tension spring 129). Then, the inclined plane inside the triangular groove 126 and the inner wall of the outer rotating sleeve 120 will form an extrusion on the friction column 128, and the frictional force received by the friction column 128 from the outer rotating sleeve 120 is also in the direction towards the permanent magnet 127. Therefore, the extrusion will be further increased. At this time, the friction column 128 will be stuck between the permanent magnet 127 and the outer rotating sleeve 120. Then, the outer rotating sleeve 120 will be driven to rotate by the inner rotating block 119 through the friction column 128. The rotation of the outer rotating sleeve 120 will drive the middle rotating disk 123 to rotate. The rotation of the middle rotating disk 123 will drive the input shaft of the generator 115 to rotate. The rotation of the input shaft of the generator 115 will generate voltage, and then transmit an alarm signal to the outside through the transmitting end. Therefore, an alarm signal can be issued without setting a power supply inside the housing 101.

[0033] Meanwhile, when the detection beam 106 quickly resets, the extrusion plate 132 will quickly separate from the force-sensitive resistor 113. At this time, the pressure on the force-sensitive resistor 113 will instantaneously decrease, causing the resistance value of the force-sensitive resistor 113 to instantaneously increase. Since the voltage of the capacitor C1 cannot change instantaneously, an instantaneous charging current will be generated. This current will pass through the coil of the relay, thereby causing the normally open contact of the relay to close (its sensitivity adjustment: the capacitor C1 affects the trigger sensitivity, the larger the value, the longer the response time; the resistor R2 controls the discharge speed of the current, the larger the value, the lower the sensitivity, and the resistor R2 is used to control the discharge of the current). Then, the starting motor 114 and the electromagnetic friction disc 121 will be energized. The electromagnetic friction disc 121 generates a magnetic force to attract the friction passive disc 122. The output shaft of the starting motor 114 drives the spline shaft 125 to rotate. The spline shaft 125 drives the electromagnetic friction disc 121 to rotate. The electromagnetic friction disc 121 drives the friction passive disc 122 to rotate. The friction passive disc 122 drives the intermediate rotating disc 123 to rotate. The intermediate rotating disc 123 drives the input shaft of the generator 115 to rotate. The rotation of the intermediate rotating disc 123 will also drive the outer rotating sleeve 120 to rotate. The rotation of the outer rotating sleeve 120 will drive the friction column 128 to rotate away from the permanent magnet 127. At this time, the inner wall of the outer rotating sleeve 120 and the inclined surface of the triangular groove 126 will no longer squeeze the friction column 128, resulting in the power not being transmitted from the intermediate rotating disc 123 to the inner rotating block 119. It should be noted that when the starting motor 114 can work normally, whether the mechanical mechanism at the inner rotating block 119 is effective or not, the input shaft of the generator 115 will rotate. However, when the starting motor 114 cannot work normally, the mechanical mechanism at the inner rotating block 119 will also drive the input shaft of the generator 115 to rotate. Since the starting motor 114 requires electrical energy to be effective, when the power system fails, the mechanical mechanism at the inner rotating block 119 can still work normally.

Claims

1. A hoisting and lifting system with safety protection function, characterized in that: The invention comprises a support beam plate (103), an auxiliary support plate (104) is fixedly mounted on the support beam plate (103), and a starter motor (114) and a generator (115) are fixedly mounted on the auxiliary support plate (104); wherein two parallel detection beam frame sliding rods (105) are also fixedly mounted on the support beam plate (103), a detection beam frame (106) is slidably mounted on the two detection beam frame sliding rods (105), a return spring (109) is disposed around each detection beam frame sliding rod (105), and two ends of the return spring (109) are fixedly matched with the detection beam frame (106) and the support beam plate (103); An extrusion slide bar bracket (110) is fixedly installed on the side of the detection beam frame (106), an extrusion slide bar (112) is slidably arranged on the extrusion slide bar bracket (110), an extrusion plate (132) is fixedly arranged at the bottom end of the extrusion slide bar (112), a force sensitive resistor (113) is arranged directly below the extrusion plate (132), the force sensitive resistor (113) is overlapped on the support beam plate (103), an extrusion spring (111) is arranged around the extrusion slide bar (112), and both ends of the extrusion spring (111) are fixed to the extrusion slide bar bracket (110) and the extrusion plate (132), wherein the extrusion plate (132) and the force sensitive resistor (113) are in contact and extrusion fit; A closed support frame (116) is also fixed on the auxiliary support plate (104), and the closed support frame (116) is rotatably matched with the spline shaft (125) and the electromagnetic friction disk (121) to prevent the electromagnetic friction disk (121) from sliding off the spline shaft (125); a gear (118) is also rotatably mounted on the closed support frame (116), an inner rotating block (119) is coaxially fixed on the gear (118), an outer rotating sleeve (120) is provided on the outer rotating sleeve of the inner rotating block (119), wherein the middle rotating disk (123) is fixedly matched with the outer rotating sleeve (120); the inner rotating At least two triangular grooves (126) are formed on the block (119), and a permanent magnet (127) is fixed at the narrow end of the triangular groove (126), and the permanent magnet (127) does not contact the outer rotating sleeve (120); the lateral magnetic force of the permanent magnet (127) is matched with a friction column (128), and a friction column tension spring (129) is fixed between the friction column (128) and the vertical surface of the triangular groove (126); wherein the longest side of the permanent magnet (127) is smaller than the diameter of the friction column (128), so that the friction column (128) cannot contact the permanent magnet (127) when it moves toward the permanent magnet (127); It also includes at least four speakers arranged around the construction site for providing spatial audio information to personnel.

2. The hoisting and lifting system with safety protection function according to claim 1 is characterized in that: A hanging frame (108) is fixedly mounted on the detection beam frame (106), a hanging hook connector (130) is fixed at the bottom of the hanging frame (108), and a hanging hook (131) is fixed on the hanging hook connector (130); a positioning block (107) is fixed on a side of the detection beam frame (106) facing the supporting beam plate (103), and the positioning block (107) is in contact with the supporting beam plate (103).

3. The hoisting and lifting system with safety protection function according to claim 2 is characterized in that: A friction passive disk (122) and an intermediate rotating disk (123) are also rotatably mounted on the auxiliary bracket plate (104), and the friction passive disk (122) and the intermediate rotating disk (123) are in transmission cooperation via a transmission belt (124), wherein the intermediate rotating disk (123) is fixed on the input shaft of the generator (115), and wherein the friction passive disk (122) is in rotation cooperation with the output shaft of the starter motor (114).

4. The hoisting and lifting system with safety protection function according to claim 3 is characterized in that: A spline shaft (125) is fixed on the output shaft of the starter motor (114), and an electromagnetic friction disc (121) is sleeved on the spline shaft (125) in a spline sliding manner. The electromagnetic friction disc (121) and the friction passive disc (122) are matched by friction transmission, and the electromagnetic friction disc (121) and the friction passive disc (122) are matched by magnetic force.

5. The hoisting and lifting system with safety protection function according to claim 4 is characterized in that: A rack (117) is fixedly mounted on the detection beam frame (106); the rack (117) is slidably matched with the closed support frame (116); and the rack (117) is meshed with the gear (118) for transmission.

6. The hoisting and lifting system with safety protection function according to claim 5 is characterized in that: The supporting beam plate (103) is fixedly mounted on the inner wall of the outer shell (101), a bottom dust cover (102) is fixedly mounted on the bottom of the outer shell (101), and the outer shell (101) is fixedly connected to the end of the steel wire rope of the crane.

7. The hoisting and lifting system with safety protection function according to claim 6 is characterized in that: The force-sensitive resistor (113) is connected in series with a fixed resistor R1 in a DC circuit, and the middle position between the force-sensitive resistor (113) and the fixed resistor R1 is connected to the negative electrode of the DC power supply via the capacitor C1 and the relay coil in sequence, and the middle position between the fixed capacitor C1 and the relay coil is connected to the negative electrode of the power supply via the fixed resistor R2.

8. The hoisting and lifting system with safety protection function according to claim 7 is characterized in that: The capacitor C1 and the fixed value resistor R2 are installed in a manner that is easy to replace; wherein the normally open contact of the relay serves as a starting switch for starting the motor (114) and the electromagnetic friction disk (121).

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