CN111604856A

CN111604856A - Valve head extractor

Info

Publication number: CN111604856A
Application number: CN202010355316.8A
Authority: CN
Inventors: 吴勇; 刘京进
Original assignee: Chengxi Shipyard Co Ltd
Current assignee: Chengxi Shipyard Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-09-01
Anticipated expiration: 2040-04-29
Also published as: CN111604856B

Abstract

The invention relates to the technical field of ship valve body repair and manufacture, and discloses a valve head extractor which comprises a seat block, a shaft rod rotationally arranged on the seat block, and a pair of operating arms rotationally connected with the seat block through a hinge shaft and symmetrically arranged on two sides of the shaft rod, wherein one ends of the operating arms far away from the hinge shaft are provided with clamping hooks, the middle positions of the operating arms are provided with sliding grooves, the upper end of the shaft rod is provided with a handle perpendicular to the shaft rod, the lower end of the shaft rod is connected with a lifting arm through threads, two ends of the lifting arm are respectively provided with a pin shaft, and the two pin shafts are respectively and correspondingly connected in the sliding grooves of the pair of operating arms. The valve head can be smoothly taken out, and the valve head taking device is high in efficiency and good in reliability.

Description

Valve head extractor

Technical Field

The invention relates to the technical field of ship valve body repair and manufacture, in particular to a valve head extractor.

Background

The outboard valve repair is routine engineering during ship dock repair, the opposite grinding of a valve head and a valve seat is an important process, as the diameters of some valve heads are larger (such as being more than or equal to phi 300mm), a vacuum state is formed due to the close fitting of matching surfaces during the paired grinding, and because constructors are difficult to do and do not have the factors of sweating, oil sticking and the like on hands in a cabin, in addition, the weight of the valve head and the place capable of firmly grabbing on the valve head are limited, and at the moment, the valve head and the valve seat are difficult to separate by manual work. Even if separated, because various reasons such as position or valve head self are heavier, also often have the phenomenon of landing and colliding with when extracting the valve head, cause valve head to damage and rework easily. Therefore, to better and more quickly complete each valve train repair, ensuring a docking period, the tooling is made for such large valve heads.

Disclosure of Invention

In order to solve the above problems, the present invention provides a valve head extractor, which aims to realize smooth extraction of a valve head. The specific technical scheme is as follows:

a valve head extractor comprises a seat block, a shaft rod arranged on the seat block in a rotating mode, a pair of operating arms connected to the seat block in a rotating mode through a hinge shaft and symmetrically arranged on two sides of the shaft rod, wherein a clamping hook is arranged at one end, far away from the hinge shaft, of each operating arm, a sliding groove is formed in the middle of each operating arm, a handle perpendicular to the shaft rod is arranged at the upper end of each shaft rod, the lower end of each shaft rod is connected with a lifting arm through threads, pin shafts are arranged at two ends of each lifting arm respectively and are correspondingly connected to the sliding grooves of the corresponding operating arms respectively, and the pin shafts are in sliding fit with the sliding grooves

Preferably, the hook is an elbow bent away from the central axis of the shaft.

According to the invention, the shaft lever is provided with a flange, the seat block is provided with a step hole, the shaft lever penetrates through the step hole and enables the flange to be positioned in the step hole in a rotating mode, one surface of the flange leans against the end face of the step hole, and the other surface of the flange is limited through a half ring connected with the seat block.

Preferably, the middle part of the operating arm is provided with an S-shaped bend.

As a further improvement of the invention, the handle is a hollow handle, the hollow handle is detachably connected with the shaft lever, a miniature double-shaft motor is installed inside the hollow handle, eccentric wheels are respectively connected to shaft heads at two ends of the miniature double-shaft motor, a battery installation hole is formed in the upper end of the shaft lever, a battery connected with the miniature double-shaft motor is installed in the battery installation hole, a junction box is connected to the hollow handle, and a motor button for starting or stopping the miniature double-shaft motor is arranged on the junction box.

Wherein, the both ends of hollow handle are provided with the apron.

The working principle of the invention is as follows:

when the handle is rotated, the shaft lever rotates to drive the lifting arm to ascend or descend, so that the pin shafts at the two ends of the lifting arm slide in the sliding grooves of the operating arm, and the operating arm is driven to rotate around the hinge shaft to form the contraction or expansion of the clamping hook at the lower end of the operating arm.

When the valve head is used, the handle is rotated firstly to enable the clamping hook to contract until the clamping hook can extend into the valve head inner hole, then the handle is rotated in the opposite direction to enable the clamping hook to enter the tool withdrawal groove of the valve head inner hole and clamp the tool withdrawal groove, and finally the handle is grabbed and lifted upwards to lift the valve head. If the valve head is tightly attached to the valve seat and is in a vacuum adsorption state, the motor button can be pressed while the handle is lifted upwards, a variable exciting force is formed by rotation of the eccentric wheel of the miniature double-shaft motor and is mutually cooperated with the lifting operating force, and therefore the valve head and the valve seat are smoothly separated.

The invention has the beneficial effects that:

first, the valve head extractor provided by the invention has the advantages of light weight, convenience in carrying, firm grabbing, good safety and high working efficiency.

Secondly, the valve head extractor has the advantages of large moving range of the clamping hook and good universality.

Thirdly, the double-shaft motor with the eccentric wheel is arranged in the handle, a variable exciting force is formed by the rotation of the eccentric wheel and is matched with the lifting operation force in a mutual cooperation mode, the valve head can be smoothly separated from the valve seat, and therefore the use reliability of the valve head extractor is improved.

Drawings

FIG. 1 is a schematic view of a valve head extractor of the present invention;

fig. 2 is an enlarged partial view of the handle portion of fig. 1.

In the figure: 1. the device comprises a seat block, 2, a shaft rod, 3, a hinge shaft, 4, an operating arm, 5, a clamping hook, 6, a sliding groove, 7, a handle, 8, a lifting arm, 9, a pin shaft, 10, a flange, 11, a half ring, 12, an S-shaped bend, 13, a miniature double-shaft motor, 14, an eccentric wheel, 15, a battery, 16, a junction box, 17, a motor button, 18, a cover plate, 19 and a valve head.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Fig. 1 to 2 show an embodiment of a valve head extractor according to the present invention, which includes a base block 1, a shaft rod 2 rotatably disposed on the base block 1, and a pair of operation arms 4 rotatably connected to the base block 1 through a hinge shaft 3 and symmetrically disposed on two sides of the shaft rod 2, wherein one end of each operation arm 4 away from the hinge shaft 3 is provided with a hook 5, a sliding slot 6 is disposed in the middle of the operation arm 4, the upper end of the shaft rod 2 is provided with a handle 7 perpendicular to the shaft rod 2, the lower end of the shaft rod 2 is connected to a lifting arm 8 through a thread, two ends of the lifting arm 8 are respectively provided with a pin 9, two pin 9 are respectively and correspondingly connected to the sliding slots 6 of the pair of operation arms 4, and the pin 9 and the sliding slot 6 are in sliding fit.

Preferably, the hook 5 is a bend that is curved away from the central axis of the shaft 2.

In this embodiment, the shaft rod 2 is provided with a flange 10, the seat block 1 is provided with a step hole, the shaft rod 2 penetrates through the step hole and enables the flange 10 to be rotatably positioned in the step hole, one surface of the flange 10 abuts against an end surface of the step hole, and the other surface of the flange 10 is limited by a half ring 11 connected with the seat block 1.

Preferably, the middle of the operating arm 4 is provided with an S-shaped bend 12.

As a further improvement of this embodiment, the handle 7 is a hollow handle, the hollow handle 2 is detachably connected to the shaft lever 2, a miniature dual-shaft motor 13 is installed inside the hollow handle 2, eccentric wheels 14 are respectively connected to shaft heads at two ends of the miniature dual-shaft motor 13, a battery installation hole is formed in the upper end of the shaft lever 2, a battery 15 connected to the miniature dual-shaft motor 13 is installed in the battery installation hole, a junction box 16 is connected to the hollow handle 7, and a motor button 17 for starting or closing the miniature dual-shaft motor 13 is arranged on the junction box 16.

Wherein, both ends of the hollow handle 2 are provided with cover plates 18.

The working principle of the embodiment is as follows:

when the handle 7 is rotated, the shaft lever 2 rotates to drive the lifting arm 8 to ascend or descend, so that the pin shafts 9 at the two ends of the lifting arm 8 slide in the sliding grooves 6 of the operating arm 4, and drive the operating arm 4 to rotate around the hinge shaft 3 to form the contraction or expansion of the hook 5 at the lower end of the operating arm 4.

When the valve is used, the handle 7 is firstly rotated to enable the hook 5 to contract until the hook 5 can extend into the inner hole of the valve head 19, then the handle 7 is rotated in the opposite direction to enable the hook 5 to enter the tool withdrawal groove of the inner hole of the valve head 19 and clamp the tool withdrawal groove, and finally the handle 7 is grabbed and lifted upwards to lift the valve head 19. If the valve head 19 is in a vacuum adsorption state due to tight fit with the valve seat, the handle 7 can be lifted upwards and the motor button 17 can be pressed down, a variable exciting force is formed by rotation of the eccentric wheel 14 of the miniature double-shaft motor 13, and the exciting force and the lifting operating force are mutually cooperated, so that the valve head 19 and the valve seat are smoothly separated.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The valve head extractor is characterized by comprising a base block, a shaft rod which is rotatably arranged on the base block, a pair of operating arms which are rotatably connected to the base block through a hinge shaft and are symmetrically arranged on two sides of the shaft rod, wherein one ends of the operating arms, which are far away from the hinge shaft, are provided with clamping hooks, the middle positions of the operating arms are provided with sliding grooves, the upper ends of the shaft rod are provided with handles perpendicular to the shaft rod, the lower end of the shaft rod is connected with a lifting arm through threads, two ends of the lifting arm are respectively provided with a pin shaft, the two pin shafts are respectively and correspondingly connected in the sliding grooves of the pair of operating arms, and the pin shafts are in sliding fit with the sliding grooves.

2. The valve head extractor according to claim 1, wherein said hook is a bent head bent away from the central axis of said shaft.

3. The valve head extractor according to claim 1, wherein the shaft has a flange, the seat block has a stepped hole, the shaft passes through the stepped hole and allows the flange to be rotatably positioned in the stepped hole, one side of the flange abuts against an end surface of the stepped hole, and the other side of the flange is retained by a half ring connected to the seat block.

4. The valve head extractor according to claim 1 wherein the middle portion of said operating arm is provided with an S-bend.

5. The valve head extractor according to claim 1, wherein the handle is a hollow handle, the hollow handle is detachably connected to the shaft, a micro double-shaft motor is installed inside the hollow handle, eccentric wheels are respectively connected to two end shaft heads of the micro double-shaft motor, a battery installation hole is formed in the upper end of the shaft, a battery connected to the micro double-shaft motor is installed in the battery installation hole, a junction box is connected to the hollow handle, and a motor button for starting or stopping the micro double-shaft motor is arranged on the junction box.

6. The valve head extractor according to claim 5, wherein the hollow handle is provided with cover plates at both ends.