CN104176635A - Liquefied natural gas pump lifting device - Google Patents

Abstract

The invention provides a liquefied natural gas pump lifting device which is simple to move and install and easy to maintain and operate. The liquefied natural gas pump lifting device comprises a supporting column which is vertically arranged on the ground or a storage tank at the side of the liquefied natural gas storage tank; a bench top arranged above the supporting column through a rotation part; a cantilever which is arranged above the bench top on one end of the upper part of the supporting column in a manner of extending in a direction roughly parallel to the bench top; and an elevator provided with a pump lifting device capable of moving along the cantilever. All parts except the supporting column can be detached/assembled. Preferably, the elevator of the liquefied natural gas pump lifting device is provided with a non-oil-pressure type overloading detection device.

Description

Liquefied natural gas pump hoisting device

Technical field

The present invention relates to a kind of hoisting device of the LNG pump arranging in the LNG storage tank of storage facilities that is arranged at liquefied natural gas (being abbreviated as below " LNG ").

Background technology

LNG, as the easy energy, in general family and even various factory or business location etc., is widely used, and generally stores in having the storage facilities of large-scale storage tank and supplies.

And, conventionally storage tank by LNG pump, LNG is underground from being arranged on of above-mentioned storage facilities or ground sucts and discharges, for the LNG pump that above-mentioned LNG is sucted, character due to LNG, near the textural bottom that is arranged on storage tank, when LNG pump maintains or when repairing etc. changes, LNG pump need to be promoted in storage tank, mostly, in situation, generally in storage facilities, possesses special-purpose LNG pump hoisting device.

Fig. 4 illustrates an example of the LNG pump hoisting device in existing LNG storage facilities, LNG pump hoisting device 1 generally has following structure: by the cantilever extending to horizontal direction 3 be installed on be uprightly arranged at storage tank a part pillar 5 above configuration slewing arrangement 4, be equipped on elevator 2a, the 2b that can move along the length direction of this cantilever 3, configuration is as the portion of slinging of the LNG pump of rope assembly, by the LNG pump (not shown) that is disposed at the bottom of the conduit 7 being arranged in LNG pump 6 sling (patent documentation 1); Or as shown in Figure 5, in the lower end of pillar 5 that is uprightly arranged at the top of LNG storage tank, be provided for making pillar 5 rotations slewing arrangement 4 freely, and can rotate, simultaneously be disposed at above-mentioned pillar 5 upper end table top 8a above, possess from pillar 5 to the cantilever 3 with the extension of table top 8a general horizontal direction, elevator 2a, 2b that configuration can be moved along the length direction of this cantilever 3, in its front-end configuration portion of slinging, LNG pump (not shown) can be sling from being arranged on inside in LNG storage tank 6, that be positioned at the conduit 7 of LNG pump bracket platform 8b front end.

But, in the situation that above-mentioned existing LNG pump hoisting device 1 is as shown in Figure 5 arranged on the top of LNG storage tank 6, owing to being positioned at the structure of the lower quadrate part of pillar 5 for slewing arrangement 4, therefore aspect the safety inspection or maintenance after arranging, due to can be visual from pump bracket platform 8b, therefore aspect maintenance, do not need to climb up pillar 5, and there is advantage, but aspect the arranging of this slewing arrangement 4, due to for making the structure of pillar 5 rotation, therefore need to know various distribution plants or put on the operator of balance etc. of the weight of slewing arrangement 4.

Specifically, when LNG pump hoisting device is set, due to slewing arrangement 4, rotary configured and the motor part (not shown) for this slewing arrangement 4 is started of its machinery, its circuit structure (not shown) configuration is complicated, therefore the integral body of LNG pump hoisting device is fabricated to one, need to note formation and the configuration of each parts on one side, based on experience, adjust on one side, simultaneously in the situation that slewing arrangement 4 is arranged on to the LNG pump hoisting device of the bottom of pillar 5, not only cantilever 3 and elevator 2a, 2b, and the weight of pillar 5 also loads on slewing arrangement 4, therefore need extraly rotating energy, thereby existing problems aspect fuel efficiency.

In addition, in another LNG pump hoisting device shown in Figure 4, forming cantilever 3 is installed on along the structure of the S. A. of pillar 5 configurations along horizontal direction, therefore can not produce the such problem that need to adjust slewing arrangement 4 or larger rotating energy etc. of LNG pump hoisting device as shown in Figure 5, but in the situation that the slewing arrangement 4 of Fig. 4, by S. A., make cantilever 3 rotations, rotating range is limited, therefore in the situation that slinging a plurality of LNG pump, must be noted that the hand of rotation of S. A., complicated operation.

And, the arrange increase in demand of state to the storage facilities of LNG is out at present, this situation, in the situation that above-mentioned hoisting device is set, need to will in the assembling parts Bing factory of the hoisting device of column sections, cantilever, elevator etc., manufacture, after once assembling and carrying out inching, conveyance is to erecting stage, need at the scene again by skilled operator, to carry out whole setting operations, this has problems aspect operating efficiency or conveyance cost.

In addition, in existing LNG pump hoisting device, in order to detect the summation that loads on the heavy burden on used a plurality of elevators, use the mechanical overburden detecting device of the use hydraulic type cylinder shown in patent documentation 2, owing to adopting the relation of hydraulic type cylinder, it is complicated that maintenance becomes, and with timer is whole, becomes large, therefore has the problem that weight increases and cost increases.

Prior art document

Patent documentation

Patent documentation 1: Japanese Patent Publication 63-10320 communique

Patent documentation 2: TOHKEMY 2002-53294 communique

Summary of the invention

(problem that invention will solve)

In order to address the above problem, the invention provides a kind of LNG pump hoisting device, by slewing arrangement being configured in to the upper end of the pillar of LNG pump hoisting device, the separated manufacture of part of leg portion and the LNG that comprises slewing arrangement pump can being sling, simultaneously, by slewing arrangement being arranged on to top, alleviate the heavy burden that loads on slewing arrangement, reduce the setup cost of LNG pump hoisting device simultaneously.

And, a kind of LNG pump hoisting device is provided, the overburden detecting device that possesses non-hydraulic type in elevator portion, when carrying out LNG pump while slinging, in the situation that produce the load more than setting, the rolling and giving the alarm of the rope of this overburden detecting device system for stopping elevators, when LNG pump is sling, detect the summation of the heavy burden that each a plurality of elevators bears, prevent elevator malfunctions, thereby sufficient safety is guaranteed in further lightweight and reducing costs simultaneously.

(technical scheme of technical solution problem)

Therefore, LNG pump hoisting device of the present invention is characterised in that and comprises: pillar, is vertically installed on ground or LNG storage tank in the side of LNG storage storage tank; Table top, is arranged on the top of described pillar via slewing arrangement; Cantilever, is extending upward setting from the one end on described pillar top with described table top almost parallel side; At least two elevators, set as moving in the longitudinal direction along described cantilever.

According to the present invention, different from existing LNG pump hoisting device, be vertically installed on the ground or LNG storage tank on pillar above, via slewing arrangement, configuration has the sling cantilever that elevator moved of parts of LNG pump, therefore only manufacture in addition the part on slewing arrangement that is arranged at that needs adjustment, can carry out high-precision adjustment, in addition, can construct in addition at the scene the leg portion that needs the long duration, construct by each parts are set by slewing arrangement, thereby realize low-cost and arrange rapidly.

And, in the present invention, because each parts except described pillar can decompose/assemble, therefore can be by each parts conveyance efficiently except pillar to on-the-spot, it is also actv. that the while needs in the situations such as replacing of each parts after arranging.

In addition, in the present invention, the sling elevator of use of LNG pump consists of at least two elevators with primary mover, reductor and winding drum, has: link plate, links one end of each torque arm of described elevator; Spring body shrinks when the load of described link plate is surpassed to setting value; Sensor, when described spring body shrinks, by working with described torque arm butt, thereby sends signal.In at least one of described torque arm, there is overburden detecting device, described overburden detecting device stops described reductor to the rope direction rotation of slinging, and can be to emitting direction rotation, when emitting the rotational force of direction over described setting value to rope, described spring body shrinks, and makes described working sensor.

(effect of invention)

By slewing arrangement being configured in to the top of the pillar of LNG pump hoisting device, the LNG pump that can separated manufacture leg portion and the comprise rotating part part of slinging, simultaneously, by rotating part being arranged on to top, the heavy burden that loads on rotating part can be alleviated, the setup cost of LNG pump hoisting device can be reduced simultaneously.

And, because the sling elevator of use of LNG pump has the overburden detecting device of non-hydraulic type, the summation of the heavy burden that the overburden detecting device of described non-hydraulic type each a plurality of elevator when LNG pump is sling is born, prevent elevator malfunctions, thereby further realize lightweight, easy to repairization, reduce costs, guarantee sufficient safety simultaneously.

Accompanying drawing explanation

Fig. 1 is the instruction diagram that embodiments of the present invention are shown.

Fig. 2 is the front view of the elevator that relates to of embodiments of the present invention.

Fig. 3 is the cutaway view of the elevator of Fig. 2.

Fig. 4 is the instruction diagram that the example of existing LNG pump hoisting device is shown.

Fig. 5 illustrates the instruction diagram of example of the existing LNG pump hoisting device different from Fig. 4 that slewing arrangement is arranged on the downside of pillar.

Nomenclature

1 LNG pump hoisting device

2a, 2b elevator

3 cantilevers

4 slewing arrangements

5 pillars

6 LNG storage tanks

7 conduits

71 lids

8a table top

8b pump bracket platform

21 elevator shells

22 primary movers

23 reductors

24 housings

25 output shafts

26 winding drums

27 bolts

28a, 28b torque arm

28c arm

29a, 29b rope

30 retainers

31 steel balls

32 adjusting pins

33 spring bodies

34 sensors

35 link plates

36 bearings

37 wheel hubs

38 bearings.

The specific embodiment

Below, with reference to the accompanying drawings of for implementing mode of the present invention.

Fig. 1 illustrates the preferred implementation of the LNG pump hoisting device 1 the present invention relates to, be disposed on the ground or top or the sidepiece of the LNG storage tank 6 of semi-underground setting, it is configured to, pillar 5 is vertically set, above pillar 5, configure slewing arrangement 4, with be arranged in the table top 8a almost parallel direction of upside of this slewing arrangement 4, the cantilever 3 that extend the one end of the top from the axis of pillar 5 is installed, cantilever 3 rotates and sets freely centered by this slewing arrangement 4 on the top of pillar 5.

In addition, be configured to: the elevator 2a that configuration can be moved along cantilever 3, elevator 2b, be disposed at LNG pump hoisting device 1 pillar 5 below the front end of center position of LNG storage tank 6 of pump bracket platform 8b near, possesses the conduit 7 of taking in LNG pump (not shown), when LNG pump is sling, first by elevator 2b, lid 71 is taken off, by being accommodated in the LNG pump of the elevator shell 21 elevator 2a of use that slings, the LNG pump (not shown) being accommodated in conduit 7 is sling afterwards.

And, can develop a kind of LNG pump hoisting device, by slewing arrangement 4 rotations being configured in freely to the upper end of pillar 5, the rotating range problem of the such rotating part of existing LNG pump hoisting device disappears as shown in Figure 4, simultaneously different from the existing LNG pump hoisting device shown in Fig. 5, when manufacturing pillar 5, physical structure for slewing arrangement 4, circuit relationships, the essentiality of trickle adjustment reduces, therefore, about pillar 5, can order goods to the regional producer of delivery, in factory, manufacture the slewing arrangement 4 as the main portion of this device, cantilever 3, elevator 2a, elevator 2b etc. conveyance, assemble at the scene, therefore can reduce conveyance expense, the manufacturing cost of pillar 5, simultaneously, be formed on pillar 5, do not have rotary configured, and the structure that upside more than table top 8a can be rotated, therefore from fuel efficiency aspect, very efficient.

In addition, in the present invention, overburden detecting device is set, for detection of the heavy burden that loads on a plurality of elevator 2a, when surpassing the heavy burden of setting, loads in the situation of the rope of rolling by elevator 2a, end to roll, prevent in advance elevator 2a fault, damage.

Here, load detecting device in the weight-lifting equipment of the overburden detecting device in the present invention and a plurality of elevators of use shown in existing patent documentation 2 is different, do not need oil cylinder, can in the situation that surpass the heavy burden of setting value, load on elevator 2a more simply, operation stops slinging.

About concrete structure, use Fig. 2 and Fig. 3 to describe, the chassis B moving along the lower end flange of shaped steel A at the wheel lower elevator 2a that hangs oneself, in the present embodiment, two elevator 2a, 2a are maintained at the inside of elevator shell 21 mutually substantially in parallel in the position that clips shaped steel A.

Each elevator 2a has primary mover 22 and the reductor 23 being configured on same central axis and surrounds the winding drum 26 of reductor 23 and concentric configuration.The general using method of reductor 23 is, housing 24 is fixed on to elevator shell 21 and makes winding drum 26 rotations by output shaft 25, but in the present embodiment, by bolt, housing 24 is fixed on to winding drum 26, output shaft 25 is fastening with torque arm 28a, 28b, and the bearing of the face wall side 2A by elevator shell 21 can be supported rotatably simultaneously.

And, winding drum 26 is in an end and housing 24 combinations of output shaft 25 sides, back face wall 2B at elevator shell 21 installs primary mover 22, make its output shaft be supported by bearing 38 to the wheel hub 37 of the inner side perforation of elevator shell 21 simultaneously, thus, winding drum 26 with primary mover 22, the same central axis of reductor 23 on rotate, carry out rope 29a, 29b to roll or emit.

Two elevator 2a, 2a make rope 29a, 29b close to each other and extend abreast downwards from side respect to one another, by making the rotation round about mutually of these winding drums 26, two rope 29a, 29b are rolled simultaneously or emitted, object (LNG pump) is hooked on to the hook (not shown) that is installed on its front end, carries out slinging, hanging down of LNG pump.

Torque arm 28a, 28b is set on face in parallel, to rotate in the outer side of face wall 2A, under this state, when winding drum 26 rotates to rope roll up direction, output shaft 25 and torque arm 28a, the rotation of 28b one, therefore the retainer consisting of set screw 30 is arranged to the torque arm 28b that in the front view of Fig. 2 arm is positioned at upside on face wall 2A, stop rotation, while is for the rotation of another torque arm 28a, by two torque arm 28a, 28b is formed and is connected structure by link plate (リ Application Network プ レ ー ト) 35, can stop and rotatablely move, make torque arm 28a, 28b is subject to the rotation counter-force of reductor 23 and forms.

When slinging goods, the housing 24 of reductor 23 and winding drum 26 produce the rotational force that rope is emitted direction, on output shaft 25 and torque arm 28a, also produce above-mentioned rotational force.In order to emit the rotational force of direction corresponding to this rope, the device that the load detection consisting of steel ball 31, adjusting pin 32, spring body 33 in the arranged outside of the torque arm 28a of downside is used, possesses sensor 34 in the position of the distance of the torque arm 28a regulation from above-mentioned downside.

The initial stage of spring body 33 bears a heavy burden and can regulate corresponding to emitting the rotational force of direction to rope, in the situation that the torque arm 28a of downside presses the bounce of force rate spring body 33 of spring body 33 is large, the distance of the downward side shifting regulation of torque arm 28a, makes sensor 34 work, sends signal.In the present embodiment, configuration limit sensor.

When goods is sling, two rope 29a, 29b substantially equably burden bear a heavy burden, but the balance owing to slinging etc., if one is lax, another root rope will bear whole heavy burdens.Therefore, often detect the heavy burden summation that puts on two rope 29a, 29b, when there is the situation of heavy burden summation over setting value, need to make sensor 34 work, to end the operation of slinging.

Here, in the overburden detecting device relating in present embodiment, by link plate 35, the arm 28c of torque arm 28a, 28b is linked, thereby torque arm 28a presses the summation that the power of steel ball 31 becomes the heavy burden that puts on torque arm 28a, 28b, even if a line relaxation, also can detect the heavy burden of torque arm 28a, 28b integral body.

Therefore, in the situation that it is large to press the heavy burden that the force rate spring body 33 of steel ball 31 sets, spring body 33 shrinks, torque arm 28a, 28b emit direction rotation to rope, with be arranged on torque arm 28a downside sensor 34 butts and make sensor 34 work, stop slinging or sending predetermined alarm etc.

As mentioned above, according to the present invention, by slewing arrangement 4 being configured in to the upper end of pillar 5, thereby to not restriction of the anglec of rotation, pillar 5 and miscellaneous part can be manufactured respectively, and, the overburden detecting device using according to the present invention, do not need the oil pressure parts such as oil cylinder that load detection uses, piston element, and the load can detect LNG pump with the simple formation of machinery and sling time, can cut down manufacturing cost, the conveyance cost of LNG pump hoisting device simultaneously.

Claims (3)

1. a liquefied natural gas pump hoisting device, is characterized in that comprising: pillar, is vertically installed in ground or liquefied natural gas (LNG) tank in the side of liquefied natural gas storage storage tank; Table top, is arranged on the top of described pillar via slewing arrangement; Cantilever, is extending upward setting from the one end on described pillar top with described table top almost parallel side; At least two elevators, are set as moving in the longitudinal direction along described cantilever.

2. liquefied natural gas pump hoisting device according to claim 1, is characterized in that, each parts except described pillar can decompose/assemble.

3. liquefied natural gas pump hoisting device according to claim 1 and 2, is characterized in that,

The sling elevator of use of liquefied natural gas pump has primary mover, reductor and winding drum;

Also have: link plate, links one end of each torque arm of described elevator simultaneously;

Spring body shrinks when the load of described link plate is surpassed to setting value;

Sensor, when described spring body shrinks, by working with described torque arm butt, thereby sends signal;

In at least one of described torque arm, there is overburden detecting device, described overburden detecting device stops described reductor to the rope direction rotation of slinging, and can be to emitting direction rotation, when emitting the rotational force of direction over described setting value to rope, described spring body shrinks, and makes described working sensor.