CN100500547C

CN100500547C - Protective device for crane

Info

Publication number: CN100500547C
Application number: CNB2007100496350A
Authority: CN
Inventors: 李文钰; 山松林; 赵光; 李劲松; 曾毅刚; 罗文广; 陈启兵
Original assignee: Nuclear Power Institute of China
Current assignee: Nuclear Power Institute of China
Priority date: 2007-07-30
Filing date: 2007-07-30
Publication date: 2009-06-17
Anticipated expiration: 2027-07-30
Also published as: CN101100265A

Abstract

The present invention provides one kind of crane protecting device, which consists of one crane load monitoring unit and one protecting control unit connected serially. The crane load monitoring unit includes one weight sensor with the upper end connected to the hook and the lower end connected to the lower link, one sling fixed onto the lower link, and one signal circuit connected between the weight sensor and one signal output port. The protecting control unit includes one connecting rod connected to the sling, one pull rod, one hook, one spring, one sleeve, one spring clamp, one support, one signal emitter, two stroke switches, two signal circuits, etc. The present invention has the advantages of automatic monitoring of crane load change and capacity of indicating crane state.

Description

Protective device for crane

Technical field

The present invention relates to a kind of suspender, be specifically related to a kind of protective device for crane.

Background technology

In the lifting field, when having been exceeded the specified limit value of weight-lifting equipment,, will cause the weight-lifting equipment damage because weight-lifting equipment can not have been monitored weight of heavy automatically and protection is shut down by a weight, caused weight to fall; When operating in the blind area, the operating personal of hoisting crane often can not judge rightly out and be played a weight and be hampered in transferring process or transferred and put in place.

Particularly when active material is carried out hoisting operation, carry out irradiation when test when active material being put into challenge devices with hoisting crane, because operation place radioactive dosage is bigger, the come in and go out operation of challenge devices of active material, all by operating personal in the indoor remote execution of crane driver.But the defective of this operating mode maximum is: operating personal can't directly be monitored the handling situation of active material when operation in real time, the accident that the easy hoist cable that holds the lotus active material is broken.When such accident occurring, active material will fall and pass the bottom of the active section of reactor core to irradiation devices rapidly, caused the damage of active material, caused bigger reactivity disturbance, thereby the safe operation meeting of reactor caused had a strong impact on.So, develop the carrying of a kind of hoisting crane and surpass the hoisting capacity of setting and just can stop the lifting action automatically, and can monitor the fender guard whether a quilt weight be in place and be very important.

Summary of the invention

The objective of the invention is to: provide to monitor automatically and played weight of heavy, when being exceeded setting value by a weight of heavy, can be to hoisting crane with by a kind of protective device for crane of the weight of lifting enforcement safety guard-safeguard.

The objective of the invention is to realize by the enforcement following technical proposals:

A kind of protective device for crane, constitute by lifting load variations monitoring device and protection control setup two parts serial connection, it is characterized in that: described lifting load variations monitoring device, include: hook, the weight sensor that is connected with this hook lower end, with the lower link that this sensor is connected, be fixed on the suspension ring on this lower link, an end connects the signal line I of weight sensor, other end connection output signal port;

Described protection control setup; include: the pipe link that is connected with suspension ring in the lifting load variations monitoring device; the pull bar that is solidly fixed with this pipe link bottom; be connected in the suspension hook of this pull bar lower end; be sleeved on the spring on this pull bar; suit is fixed on the top of this pull bar; the top of this spring is blocked in its bottom; be fixed with two bump I on its sidewall respectively; the spring bearer plate of II; upper end plug is equipped with on top at this spring bearer plate and the pull bar that is connected with it; the hypomere of pipe link passes the centre hole of this upper end plug and the pull bar below it is fixed with one; in upper end plug; spring bearer plate; spring; and the periphery of the hypomere of pipe link and pull bar; be set with the sleeve that has a vertical twice bump slideway mouth on the sidewall; this upper cartridge inwall and upper end plug are connected as a single entity; the bottom of this cover tube end plate fixing spring; and on this sleeve lateral wall, fixedly have travel switches I respectively; two travel switch bracing frame I of II; II and sender unit; travel switches I on two bracing frames; II respectively with spring bearer plate on two the bump I; II is corresponding; also have an end to connect travel switches I; the other end connects the signal line II of sender unit, and an end connects travel switches I I; the other end connects the signal line III of output signal port.

Additional technical feature is:

On described lifting load variations monitoring device, also be provided with the weight sensor protective cover.

On described protection control setup, also be provided with protection control device protective cover.

The lower link of described weight sensor links into an integrated entity by pin and suspension ring.

The described upper end plug of cover on the simple upper inner wall that be fixed on, screw thread and sleeve by its side wall surface are solidly fixed.

Outstanding effect of the present invention is: when playing heavy load above the protection limit value, bump head in the fender guard of the present invention moves and has triggered the travel switch action, by signal line III and signal line I transmission guard signal, send guard signal by wireless signal transmitting device, this two road signals execution two is got one and is transferred to hoisting crane, suspension hook vertical relay in the crane hook control system is opened circuit, send sound, light warning simultaneously, thereby can realize protection; When the crane operation personnel operate in the blind area, can pass through the indoor telltale of crane driver, automatically monitor the lifting load variations, correct judged whether weight is hampered in lifting process or smoothly decline put in place, guaranteed weight-lifting equipment and, improved the reliability and the operability of weight-lifting equipment by the safety of a weight.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Mark among the figure: 1 is hook, and 2 is weight sensor, and 3 is signal line I; 4 is signal output port, and 5 is the weight sensor protective cover, and 6 is the weight sensor lower link; 7 is pin, and 8 is suspension ring, and 9 is pipe link; 10 is sleeve, and 11 is sender unit, and 12 is upper end plug; 13 is travel switch bracing frame I; 14 is signal line II, and 15 are a bump I, and 16 is spring bearer plate; 17 is travel switches I; 18 is pull bar, and 19 is spring, and 20 are the cover tube end plate; 21 is suspension hook; 22 is travel switch bracing frame II, and 23 is travel switches I I, and 24 is signal line III; 25 are a bump II; 26 is upper end plug sidewall outside thread, and 27 is the sleeve lining screw thread, and 28 are protection control setup protective cover.

The specific embodiment

Now in conjunction with the accompanying drawings and embodiments the present invention is further described:

As shown in Figure 1, the present invention is made of lifting load variations monitoring device and protection control setup serial connection.Wherein:

Lifting load variations monitoring device, there is dress to insert the hook 1 that is fixed on weight sensor protective cover 5 tops, be encapsulated in the weight sensor 2 that is connected with hook 1 lower end in these protective cover 5 housings, the lower link 6 that is connected with weight sensor 2, suspension ring 8, the one ends connection weight sensor 2, the other end that are fixed on the lower link 6 by pin 7 connect the signal line I that is contained in the output signal port 4 on the protective cover housing.

Described protection control setup has, dress integrally welded with suspension ring 8 bottoms to be inserted in the pipe link 9 in protection control setup protective cover 28 housings, and the top weldering of the bottom of this pipe link 9 and the pull bar below it 18 is an one; The pipe link 9 in protective cover 28 housings and the periphery of pull bar 18, be set with the sleeve 10 that has a vertical twice bump slideway mouth on the sidewall symmetrically, by the inner thread 27 on these sleeve 10 tops and the sidewall thread 26 of upper end plug, the upper end plug 12 that will have centre hole is fixed on the upper end inwall of sleeve 10, makes upper end plug 12 and sleeve 10 form one; And passing the centre hole and the pull bar 18 of upper end plug, the hypomere of pipe link 9 is welded as a whole; The riveted joint of bilateral symmetry ground has the spring bearer plate 16 of an a pair of bump I, II, be weldingly fixed on the following sidewall in pull bar 18 tops, a pair of bump I, II on this spring bearer plate lays respectively in a pair of vertical bump slideway mouth on sleeve 10 sidewalls, spring 19 is placed in this sleeve and is sleeved on this pull bar 18, the top that the positioning groove of spring bearer plate 16 lower ends blocks spring 19, the bottom of this spring is by base plate 20 location of sleeve 10; On the sidewall of sleeve 10, symmetry is welded with a pair of travel switch bracing frame I, II respectively, travel switches I, II on this two bracing frame, be on the vertical curve with each a self-corresponding bump I, II respectively, and their positions on each travel switch bracing frame, set according to an amount of spring compression that plays the decision of weight weight (i.e. the displacement of a bump I, II), these two travel switch bracing frame I, II, again by bolt on the housing of protection control setup protective cover 28; On the epimere sidewall of sleeve 10, be fixed with sender unit 11, and one end connect the signal line II that travel switches I, the other end connect sender unit 11, one end connects the signal line III that travel switches I I, the other end connect output signal port 4 on weight sensor protective cover 5 housings, is in protective cover 28 outsides in addition, is welded on the suspension hook 21 of pull bar 18 bottoms.

Principle of work of the present invention is: abnormal condition (being stuck as active material) or lifting weight are occurring when overweight in irradiation devices; since device stressed much larger than normal operation time institute stressed; play weight pulling pull bar 18 during lifting by spring bearer plate 16 compression springs 19 and move down; bump on a spring bearer plate I; II moves down simultaneously with pull bar 18; when being exceeded setting value by a weight weight; spring 19 is stressed reach setting protection (be the length of spring compressed stroke reach the setting stroke time); a bump I; II clashes into cooresponding travel switches I; II makes each self closing of two switches; by signal line III guard signal is transferred to the indoor telltale of crane driver through signal output port 4; simultaneously; launch guard signals to the indoor signal receiving device of crane driver by signal line II and sender unit 11; and transfer signals to the suspension hook vertical relay of crane hook control system by this device; two road guard signals execution two gets one disconnects the suspension hook vertical relay; crane hook then stops to rise; when realizing that suspension hook stops to rise, the indoor combined aural and visual alarm of crane driver sends sound; visual alarm.

Claims

1, a kind of protective device for crane is made of lifting load variations monitoring device and protection control setup two parts serial connection, it is characterized in that:

Described lifting load variations monitoring device, include: hook (1), the weight sensor (2) that is connected with this hook lower end, the lower link (6) that is connected with this sensor, be fixed on the suspension ring (8) on this lower link, one end connects weight sensor (2), and the other end connects the signal line I of output signal port (4);

Described protection control setup; include: the pipe link (9) that is connected with suspension ring (8) in the lifting load variations monitoring device; the pull bar (18) that is solidly fixed with this pipe link bottom; be connected in the suspension hook (21) of this pull bar lower end; be sleeved on the spring (19) on this pull bar; suit is fixed on the top of this pull bar; the top of this spring (19) is blocked in its bottom; be fixed with two bump I on its sidewall respectively; the spring bearer plate of II (16); upper end plug (12) is equipped with on top at this spring bearer plate and the pull bar (18) that is connected with it; the hypomere of pipe link (9) passes the centre hole of this upper end plug and the pull bar below it (18) is fixed with one; in upper end plug (12); spring bearer plate (16); spring (19); and the periphery of the hypomere of pipe link (9) and pull bar (18); be set with the sleeve (10) that has a vertical twice bump slideway mouth on the sidewall; this upper cartridge inwall and upper end plug (12) are fixed with one; the bottom of this cover tube end plate (20) fixing spring (19); and on this sleeve lateral wall, fixedly have travel switches I respectively; two travel switch bracing frame I of II; II and sender unit (11); travel switches I on two bracing frames; 1I respectively with spring bearer plate (16) on two the bump I; II is corresponding; also have an end to connect travel switches I; the other end connects the signal line II of sender unit (11), and an end connects travel switches I I; the other end connects the signal line III of output signal port (4).

2, according to the described protective device for crane of claim 1, it is characterized in that: on described lifting load variations monitoring device, also be provided with weight sensor protective cover (5).

3, according to the described protective device for crane of claim 1, it is characterized in that: on described protection control setup, also be provided with protection control setup protective cover (28).

4, according to the described protective device for crane of claim 1, it is characterized in that: the lower link (6) of described weight sensor (2) links into an integrated entity by pin (7) and suspension ring (8).

5, according to the described protective device for crane of claim 1, it is characterized in that: the described upper end plug (12) that is fixed on sleeve (10) the upper inner wall, the screw thread (26) by its side wall surface is solidly fixed with sleeve (10).