CN221389675U - Auxiliary installation device for driving rod - Google Patents

Abstract

The auxiliary driving rod mounting device comprises an inner sleeve, an outer sleeve and a plurality of grippers, wherein the inner sleeve is provided with a cavity for accommodating a driving rod and comprises a side wall hollowed-out part; the outer sleeve is sleeved on the periphery of the inner sleeve in an axially up-and-down movable manner; the grippers are positioned at the hollow parts of the side walls and are connected with the side wall pin shafts of the inner sleeve, and the grippers comprise cantilevers positioned at the top ends and hooks positioned at the tail ends; the grippers are arranged to tilt radially outwards when the cantilever is extruded by the outer sleeve, and are further arranged to clamp the driving rod radially inwards when the cantilever and the grippers are simultaneously extruded by the outer sleeve. The device can simply, quickly and reliably assist the installation of the driving rod and the unlocking after the driving rod is in place.

Description

Auxiliary installation device for driving rod

Technical Field

The utility model relates to the field of nuclear power station construction, in particular to the field of driving rod installation of a control rod driving mechanism in an installation stage.

Background

The control rod driving mechanism is an important component of a nuclear power station reactor control system and a safety protection system, and the control rod is lifted, lowered, held or fast inserted so as to complete the functions of starting, stopping, power adjustment and the like of the reactor.

The length of the driving rod of the nuclear power station control rod driving mechanism is about 7300mm, and the weight is about 70kg. In the installation stage, when the device is installed for the first time on site, the device needs to be turned over and erected, a special hoisting device is installed, and then the device can be hoisted above the upper internal pile component guide cylinder for installation. The driving rod is removed after being in place, and a special hoisting device is also generally adopted.

The special lifting appliance commonly used in the prior art for installing the driving rod comprises a clamp and a bolt, and the fixing is realized by adopting a bolt screwing and fixing mode. The operation lifting appliance needs to be connected and unlocked in a short distance, and a scaffold for picking and hooking needs to be erected on the periphery and the upper side of the upper internal components, so that the construction period is long, foreign matters are easy to form, the operation lifting appliance is inconvenient and safe to use, and the efficiency is low.

Disclosure of utility model

The utility model aims to provide an auxiliary installation device for a driving rod, which can conveniently realize the assembly and unlocking processes of the driving rod in the installation stage.

The auxiliary driving rod mounting device for achieving the purpose is used for mounting a driving rod and comprises an inner sleeve, an outer sleeve and a plurality of grippers, wherein the inner sleeve is provided with a cavity for accommodating the driving rod and comprises a side wall hollowed-out part; the outer sleeve is sleeved on the periphery of the inner sleeve in an axially up-and-down movable manner; the grippers are positioned at the hollow parts of the side walls and are connected with the side wall pin shafts of the inner sleeve, and the grippers comprise cantilevers positioned at the top ends and hooks positioned at the tail ends; the gripping claws are arranged to tilt radially outwards when the cantilever is extruded by the outer sleeve, and are also arranged to clamp the driving rod radially inwards when the cantilever and the gripping claws are simultaneously extruded by the outer sleeve.

In one or more embodiments, the inner sleeve is provided with an upper limit stop and/or a lower limit stop that limit the displacement of the outer sleeve.

In one or more embodiments, the device further includes a drive assembly including a connection disposed on the outer sleeve and a pull cord connected to the connection.

In one or more embodiments, the outer sleeve and the inner sleeve are stainless steel tubes.

In one or more embodiments, the device further comprises a sling disposed atop the inner sleeve.

In one or more embodiments, the wall surface of the driving rod includes a groove, and the hook is used for clamping the groove.

According to the auxiliary installation device for the driving rod, through the matching relation between the outer sleeve and the grippers, the connection hook after the driving rod is turned over and erected and the unhooking operation after the driving rod is lifted and put in place are simply and conveniently realized, the auxiliary installation device can be used in places, heights and distances without setting up a scaffold for short-distance operation, and the installation of the driving rod is safer and more efficient.

Drawings

The above and other features, properties and advantages of the present utility model will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

FIG. 1 is a schematic diagram of a structure of a gripper and a driving rod in a hook state;

fig. 2 is a schematic view of the structure of the gripper in a separated state from the driving rod.

Sign mark description

1. Lifting ring

2. Inner sleeve

3. Upper limit stop

4. Pull rope

5. Connecting part

6. External sleeve

8. Gripper jaw

9. Lower limit stop

10. Driving rod

31. Cavity cavity

32. Hollow part of side wall

33. Pin shaft

81. Cantilever arm

82. Hook claw

Detailed Description

The present utility model will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present utility model, but it will be apparent that the present utility model can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present utility model, and therefore should not be construed to limit the scope of the present utility model in terms of the content of this specific embodiment.

It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the utility model as it is actually claimed.

The installation work of the driving rod is generally carried out after the hot test of the nuclear power station is finished and before the loading work, and meanwhile, the requirements on the cleanliness in the island are very high, the construction period is short, and the task is heavy. According to the traditional installation method, a full scaffold with the diameter of about 6m and the height of about 8.5m is required to be erected around and above the upper internal components of the pile so as to facilitate the unhooking and unlocking work after the driving rod is in place. The process is complex and the use process is complex.

The auxiliary driving rod installation device can conveniently realize the assembly and unlocking process of the longer and heavier driving rods in the installation stage.

As will be appreciated in connection with fig. 1 and 2, the drive rod auxiliary mounting means comprises an inner sleeve 2, an outer sleeve 6 and a plurality of grippers 8. The inner sleeve 2 provides a cavity 31 for accommodating the driving rod 10, comprising a sidewall hollow portion 32, and a plurality of grippers 8 are arranged in the sidewall hollow portion 32. The outer sleeve 6 is fitted around the outer periphery of the inner sleeve 2 so as to be movable axially up and down. The outer sleeve 6 and the inner sleeve 2 are preferably stainless steel tubes.

The grippers 8 are located in the hollow portion 32 of the side wall and are connected to the side wall of the inner sleeve 2 through pins, and include a cantilever 81 located at the top end and a hook 82 located at the tail end. As in some embodiments, lateral connecting rods are provided on the side wall hollows 32, the grippers 8 being rotatably arranged with respect to the side wall of the inner sleeve 2 by means of pins 33.

The grippers 8 are arranged to tilt radially outwards when the cantilever arm is pressed by the outer sleeve, and are further arranged to hook the drive rod 10 radially inwards when the cantilever arm 81 and the gripper 82 are simultaneously pressed by the outer sleeve 8.

The terms "axial" and "radial" refer to the axial direction and the radial direction along the drive rod, i.e., the up-down direction and the left-right direction of the drawing, respectively.

In the embodiment of the application described, three pins 33 are mounted on the inner sleeve for fixing the three grippers 8, respectively. The three grippers 8 are closed to clamp the driving rod 10, the driving rod 10 is hoisted, and the function of releasing the driving rod can be completed after the three grippers are opened. It will be appreciated that the number of pins and grippers may be increased or decreased depending on the particular operating conditions.

Specifically, the outer sleeve 6 is mounted on the outer surface of the inner sleeve 2 as a movable member, for example, by providing a driving assembly for driving the outer sleeve to move, the driving assembly including a connection portion 5 provided on the outer sleeve and a pulling cord 4 connected to the connection portion 5. The stay cord 4 can be the object items such as thin wire rope or hemp rope, and one end is fixed on connecting portion 5, and the other end can pass through the hoisting point, and the main effect is that after the actuating lever takes place, accomplish the long-range unblock trip of device and actuating lever through operating the stay cord.

When the outer sleeve 6 is in the position shown in fig. 1, the outer sleeve 6 simultaneously presses the hooks 82 and the cantilever arms 81 of the grippers 8 inwards, forcing the grippers 8 to seize the drive rod 10. In some embodiments, the wall of the drive rod 10 includes a recess 101, and the catch 82 is configured to engage the recess 101 on the drive rod. When the outer sleeve 6 moves up to the position of fig. 2 under the traction of the pulling rope 4, the outer sleeve 6 presses only the cantilever 81, and the radial position of the cantilever 81 preferably exceeds the outer circumferential surface of the inner sleeve, so that when the outer sleeve 6 presses the cantilever 81, the gripper 8 forms a rotating structure, the hook 82 moves radially outwards with the pin 33 as a rotation axis, and the groove 101 is released, thereby releasing the driving rod 10.

Therefore, the claw on the inner sleeve can be controlled to be opened or contracted by sliding the outer sleeve up and down, so that the grabbing control of the groove part of the outer wall of the driving rod is realized.

To limit the excessive displacement of the outer sleeve 6, the inner sleeve 2 is provided with an upper limit stop 3 and/or a lower limit stop 9 which limit the displacement of the outer sleeve. The upper stop block 3 can be welded on the inner sleeve 2 by stainless steel blocks, or can be made into a detachable stop block by bolts and is arranged on the inner sleeve 2, and the main function is to limit the sliding position of the outer sleeve to the top; the lower stop 9 can be welded on the inner sleeve 2 by stainless steel blocks, and can also be made into a detachable stop by bolts and arranged on the inner sleeve 2, and the main function is to limit the sliding position of the outer sleeve to the bottom so as to avoid falling off.

In some embodiments, the device further comprises a lifting ring 1 arranged at the top of the inner sleeve, wherein the lifting ring 1 is fixed at the top of the device and is used for lifting the driving rod and the whole lifting device.

When the lifting appliance is connected to the top of the turning position of the driving rod, the lifting appliance and the driving rod can be connected only by sliding the outer sleeve to the bottommost part, the driving rod can lift the outer sleeve to the upper limit position by lifting the thin pull rope on the outer sleeve after being in place, so that the gripper on the driving rod is driven to be released, the driving rod is released, the lifting appliance can be used at an unlimited place, at a height and at a distance, the lifting appliance is convenient and quick to unlock after being in place, the scaffold is not required to be set up to operate in a short distance, the risk that foreign matters enter a pile cavity and fall down from the high altitude is reduced, the main line construction period of the pile cavity is effectively saved, and the unhooking and unlocking work after the driving rod is in place can be easily completed by utilizing the on-site installed loading and unloading machine platform or the overhauling platform, so that the driving rod is installed more safely and efficiently.

The application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the utility model, as will occur to those skilled in the art, without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model fall within the protection scope defined by the claims of the present utility model.

Claims (6)

1. Auxiliary driving rod installing device for installing driving rod, its characterized in that includes:

An inner sleeve providing a cavity for accommodating the driving rod, comprising a side wall hollowed-out part;

An outer sleeve which is sleeved on the outer periphery of the inner sleeve in an axially up-and-down movable manner; and

The grippers are positioned at the side wall hollowed-out parts, are connected with the side wall pin shafts of the inner sleeve and comprise cantilevers positioned at the top ends and hooks positioned at the tail ends;

The gripping claws are arranged to tilt radially outwards when the cantilever is extruded by the outer sleeve, and are also arranged to clamp the driving rod radially inwards when the cantilever and the gripping claws are simultaneously extruded by the outer sleeve.

2. The drive rod assist mounting apparatus as claimed in claim 1, wherein the inner sleeve is provided with an upper limit stop and/or a lower limit stop limiting displacement of the outer sleeve.

3. The actuator lever assisted attachment of claim 1 further comprising a drive assembly including a connection portion disposed on said outer sleeve and a pull cord connected to said connection portion.

4. The drive rod attachment apparatus of claim 1 wherein said outer sleeve and said inner sleeve are stainless steel tubes.

5. The actuator rod assisted attachment apparatus of claim 1, further comprising a sling ring disposed atop said inner sleeve.

6. The drive rod attachment apparatus of claim 1 wherein the drive rod wall includes a recess and the catch is adapted to engage the recess.