Steel ball mounting device of valve rod positioning structure

Abstract

A steel ball installation device of a valve rod positioning structure comprises a groove-shaped support, a horizontal air cylinder is fixed to a vertical beam at one end of the groove-shaped support, and one end of a piston rod of the horizontal air cylinder penetrates into the groove-shaped support and is fixedly provided with a pressing head. A guide block is placed on a cross beam in the groove-shaped bracket, and a stepped U-shaped clamping groove is formed in the guide block and is used for inserting a positioning sleeve and a positioning column to be mounted; a press-fitting air cylinder is installed on the guide block through an air cylinder seat, a strip-shaped long groove is formed in the air cylinder seat, and the lower end of the strip-shaped long groove is communicated with the U-shaped clamping groove. A piston rod of the press-fitting air cylinder can penetrate through the strip-shaped long groove to be inserted into the U-shaped clamping groove. The device is further provided with an elastic ejector block, and the elastic ejector block abuts against the vertical beam at the other end of the groove-shaped support. According to the device, semi-automatic installation of the valve rod positioning structure can be achieved, the labor intensity of workers can be lowered, the installation efficiency is improved, the entry standard of the workers in the working procedure is lowered, and women or weak people can also be competent for work of the project.

Description

Technical Field

[0001] The utility model relates to a steel ball installation device, in particular to a steel ball installation device for a valve stem positioning structure. Background Art

[0002] The existing valve stem positioning structure includes a positioning column provided at one end of the valve stem. A positioning sleeve is installed on one side of the valve body through a positioning valve cover. Three annular positioning ring grooves are evenly distributed on the inner wall of the positioning sleeve. Two steel balls and a pressure spring are arranged radially in the radial holes on the positioning column. The positioning column is inserted into the positioning sleeve and the steel balls are pressed by the pressure spring and snap into one of the positioning ring grooves to achieve positioning.

[0003] During installation, first, the steel balls, the spring, and the steel balls are sequentially placed into the radial holes of the positioning column. Then, the steel balls are pressed into the radial holes by fingers or with the help of a screwdriver. Next, the positioning sleeve is put on so that the steel balls enter the ring grooves of the positioning sleeve to complete the installation. There are the following problems with this installation method:

[0004] 1. It is necessary to press the steel balls with fingers (or hold a screwdriver by hand), which has certain requirements for the strength of the assembly worker; 2. It is necessary to manually press the steel balls, and the fingers are prone to fatigue after a long time; 3. When holding the steel balls by hand, since the steel balls are small in diameter and smooth on the surface, the steel balls are very easy to fall off and be lost from the hand, resulting in low installation efficiency; 4. When manually pressing the steel balls into the hole, since the steel balls are small in diameter and smooth on the surface, once not pressed firmly, the steel balls are very easy to be bounced off and lost under the action of the spring. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a steel ball installation device for a valve stem positioning structure that can reduce the labor intensity of workers and improve the installation efficiency.

[0006] To solve the above problems, the utility model adopts the following technical solutions:

[0007] A steel ball installation device for a valve stem positioning structure includes a trough-shaped bracket. A horizontal air cylinder is fixed on the vertical beam at one end of the trough-shaped bracket. One end of the piston rod of the horizontal air cylinder penetrates into the trough-shaped bracket and is fixed with a pressing head for pushing the valve stem to be installed.

[0008] A guide block is placed on the cross beam in the trough-shaped bracket. A stepped U-shaped card slot is provided in the guide block for inserting the positioning sleeve and the positioning column to be installed. A vertically arranged pressing air cylinder is installed on the guide block through an air cylinder seat. A strip-shaped long slot is provided on the air cylinder seat in the vertical direction. The lower end of the strip-shaped long slot is communicated with the U-shaped card slot for putting in the steel balls and the spring to be installed. The piston rod of the pressing air cylinder can penetrate through the strip-shaped long slot and insert into the U-shaped card slot for pressing the steel balls and the spring.

[0009] The device is also provided with an elastic top block, which abuts against the vertical beam at the other end of the channel-shaped bracket and is used to insert the positioning sleeve to be installed and position the positioning column to be installed.

[0010] As a further preference, the channel-shaped bracket is composed of a horizontally arranged cross beam and vertical beams welded at both ends of the cross beam.

[0011] As a further preference, the guide block and the cylinder seat are provided with a feeding hole communicating with each other. The lower end of the strip-shaped long groove is communicated with the U-shaped card slot through the feeding hole. A pressing sleeve is connected to the lower end of the piston rod of the pressing cylinder, and the pressing sleeve is in clearance fit with the feeding hole.

[0012] As a further preference, the U-shaped card slot is open at the front side of the guide block. The large-diameter card slot of the U-shaped card slot is in clearance fit with the positioning sleeve to be installed, and the small-diameter card slot of the U-shaped card slot is in clearance fit with the positioning column to be installed, so as to facilitate the insertion and removal of the positioning sleeve and the positioning column to be installed.

[0013] As a further preference, the elastic top block includes an outer sleeve. The outer edge and the inner hole of the outer sleeve are both stepped. A core shaft and a pressure spring are arranged in the outer sleeve. The core shaft extends out of the inner hole of the outer sleeve under the action of the pressure spring. A plug is arranged at the large-diameter end of the inner hole of the outer sleeve.

[0014] The beneficial effects of the utility model are as follows:

[0015] It can realize the semi-automatic installation of the valve stem positioning structure, which can not only reduce the labor intensity of workers, improve the installation efficiency, avoid the loss of steel balls caused by being bounced away by the spring during manual installation, but also lower the entry standard of workers in this process, enabling female workers or workers with weak physical constitutions to be competent for this project work, laying a good foundation for automated and semi-automated mass production. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the utility model.

[0017] Figure 2 is a top view of the utility model.

[0018] Figure 3 is Figure 2 the A-A sectional view of

[0019] Figure 4 is Figure 1 the B-B sectional view of

[0020] Figure 5 is a three-dimensional structural diagram of the utility model.

[0021] In the figure: channel-shaped bracket 1, elastic top block 2, outer sleeve 201, mandrel 202, pressure spring 203, plug 204, guide block 3, U-shaped card slot 301, blanking hole 302, cylinder seat 4, strip-shaped long slot 401, pressing cylinder 5, positioning sleeve 6, positioning post 7, valve stem 8, horizontal cylinder 9, pressing head 10, pressing sleeve 11, steel ball 12, spring 13. Specific embodiments

[0022] As Figures 1 to 5 shown, a steel ball installation device for a valve stem positioning structure according to the present utility model includes a channel-shaped bracket 1. The channel-shaped bracket 1 is composed of a horizontally arranged cross beam and vertical beams welded at both ends of the cross beam. Both the cross beam and the vertical beams are made of channel steel. A horizontal cylinder 9 is fixed on the vertical beam at one end of the channel-shaped bracket 1 by screws. One end of the piston rod of the horizontal cylinder 9 penetrates into the notch of the channel-shaped bracket 1 and is fixedly connected with a pressing head 10 by threads for pushing the valve stem 8 to be installed.

[0023] A guide block 3 is placed on the cross beam inside the channel-shaped bracket 1. A stepped U-shaped card slot 301 is arranged in the guide block 3. The U-shaped card slot 301 opens from the front side of the guide block 3. The large-diameter card slot of the U-shaped card slot 301 is in clearance fit with the positioning sleeve 6 to be installed, and the small-diameter card slot of the U-shaped card slot 301 is in clearance fit with the positioning post 7 to be installed, so as to facilitate the insertion and removal of the positioning sleeve 6 and the positioning post 7 to be installed.

[0024] A vertically arranged pressing cylinder 5 is installed on the guide block 3 through a cylinder seat 4. The outer shape of the cylinder seat 4 is a cuboid. A runway-shaped strip-shaped long slot 401 is arranged on the surface of the cylinder seat 4 corresponding to one side of the horizontal cylinder 9 in the vertical direction. The lower end of the strip-shaped long slot 401 communicates with the U-shaped card slot 301 for putting the steel ball 12 and the spring 13 to be installed; the pressing cylinder 5 is a pen-shaped cylinder, and its piston rod can penetrate through the strip-shaped long slot 401 and insert into the U-shaped card slot 301 for pressing the steel ball and the spring.

[0025] Blanking holes 302 which communicate with each other are arranged on the guide block 3 and the cylinder seat 4. The lower end of the strip-shaped long slot 401 communicates with the U-shaped card slot 301 through the blanking hole 302. A pressing sleeve 11 is connected to the lower end of the piston rod of the pressing cylinder 5. The pressing sleeve 11 is in clearance fit with the blanking hole 302 to facilitate the pressing of the steel ball and the spring.

[0026] The device further includes an elastic top block 2. The elastic top block 2 abuts against the vertical beam at the other end of the channel-shaped bracket 1 for inserting the positioning sleeve 6 to be installed and positioning the positioning post 7 to be installed.

[0027] The elastic top block 2 includes a circular outer sleeve 201. The outer edge and inner hole of the outer sleeve 201 are both stepped. The small-diameter end of the outer edge of the outer sleeve 201 has an interference fit with the inner diameter of the positioning sleeve 6 to be installed. A mandrel 202 and a compression spring 203 are arranged inside the outer sleeve 201. The mandrel 202 is stepped and extends from the small-diameter end of the inner hole of the outer sleeve 201 under the action of the compression spring 203. A plug 204 is fixed to the large-diameter end of the inner hole of the outer sleeve 201 by means of a thread.

[0028] During installation, the specific steps are as follows:

[0029] 1. Put the positioning sleeve on the small-diameter end of the outer sleeve 201 of the elastic top block. Put the O-ring and the baffle on the valve stem 8 in sequence. Insert the positioning sleeve 6 and the positioning post 7 connected to one end of the valve stem into the U-shaped card slot 301 of the guide block 3 respectively, so that the positioning post abuts against the outer end of the mandrel, and manually rotate the valve stem to make the radial hole on the positioning post in a vertical state and correspond to the blanking hole 302.

[0030] 2. Put the steel ball and the spring into the blanking hole 302 through the strip-shaped long groove 401, and let them fall into the radial hole of the positioning post through the blanking hole 302. If the radial hole is not in a vertical state, the valve stem can be rotated appropriately.

[0031] 3. Control the pressing cylinder 5 to extend, drive the pressing sleeve to move downward through the piston rod, press the steel ball into the radial hole of the positioning post and maintain the pressed state.

[0032] 4. Control the horizontal cylinder 9 to extend, push the valve stem to be installed through the pressing head 10, and push the positioning post into the positioning sleeve through the valve stem until the positioning post abuts against the outer sleeve 201 of the elastic top block. At this time, the elastic top block abuts against the vertical beam at the other end of the trough-shaped bracket 1.

[0033] 5. Control the pressing cylinder 5 and the horizontal cylinder 9 to retract respectively, take out the pressed positioning post and positioning sleeve from the U-shaped card slot 301 of the guide block 3, and then withdraw the elastic top block.

[0034] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the description and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, other modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A steel ball installation device for a valve stem positioning structure, characterized by: It includes a slot-shaped bracket, a horizontal cylinder is fixed on the vertical beam at one end of the slot-shaped bracket, one end of the piston rod of the horizontal cylinder penetrates into the slot-shaped bracket and is fixed with a pressure head for pushing the valve stem to be installed; A guide block is placed on the crossbeam in the slot bracket, and a stepped U-shaped slot is provided in the guide block for inserting the positioning sleeve and positioning column to be installed; a vertically arranged press-fitting cylinder is installed on the guide block through a cylinder seat, and a strip-shaped long slot is provided on the cylinder seat along the vertical direction, and the lower end of the strip-shaped long slot is connected to the U-shaped slot for inserting the steel ball and spring to be installed; the piston rod of the press-fitting cylinder can pass through the strip-shaped long slot and be inserted into the U-shaped slot for press-fitting the steel ball and spring; The device is also provided with an elastic top block, which is pressed against the vertical beam at the other end of the groove bracket and is used for inserting the positioning sleeve to be installed and positioning the positioning column to be installed.

2. The steel ball installation device of the valve stem positioning structure according to claim 1 is characterized by: The trough-shaped bracket is composed of a horizontally arranged crossbeam and vertical beams welded at both ends of the crossbeam.

3. The steel ball installation device of the valve stem positioning structure according to claim 1 is characterized in that: The guide block and the cylinder seat are provided with mutually connected feeding holes, the lower end of the strip-shaped long groove is connected with the U-shaped slot through the feeding hole, and a pressing sleeve is connected to the lower end of the piston rod of the press-fit cylinder, and the pressing sleeve is gap-matched with the feeding hole.

4. The steel ball installation device of the valve stem positioning structure according to claim 1 is characterized by: The U-shaped slot is opened at the front side of the guide block, the large-diameter slot of the U-shaped slot is gap-matched with the positioning sleeve to be installed, and the small-diameter slot of the U-shaped slot is gap-matched with the positioning column to be installed, so as to facilitate the insertion and removal of the positioning sleeve and positioning column to be installed.

5. The steel ball installation device of the valve stem positioning structure according to claim 1 is characterized by: The elastic top block includes a jacket, the outer edge and inner hole of the jacket are both stepped, a core shaft and a pressure spring are arranged in the jacket, the core shaft extends out of the inner hole of the jacket under the action of the pressure spring, and a wire plug is arranged at one end of the inner hole of the jacket with a large diameter.

Images