阅读说明：本技术 阀门铜套拆卸方法及更换方法 (valve copper bush dismounting method and valve copper bush replacing method ) 是由 张凯 吴鸿 陶键 彭宇 黎铁 彭辉 王磊 杜艳 吴卓谦 于 2018-06-06 设计创作，主要内容包括：本发明公开了一种阀门铜套拆卸方法和更换方法,属于设备检修领域。所述方法包括：移除第一锁紧件、固定件和手轮,将固定件重新安装在阀杆上,并使固定件与第一铜套接触；移除第二锁紧件,使连接套与第一铜套相对转动,通过固定件对第一铜套进行限位,使连接套从第一铜套上脱离；移除固定件,使第一铜套从阀杆上移除。本发明通过固定件对第一铜套进行限位之后,使连接套与阀杆相对转动,即可使连接套与第一铜套脱离。无需借助其它工具或设备即可完成阀门铜套的拆卸过程,较为便捷,适用范围广。(The invention discloses a valve copper bush dismounting method and a valve copper bush replacing method, and belongs to the field of equipment maintenance. The method comprises the following steps: removing the first locking piece, the fixing piece and the hand wheel, reinstalling the fixing piece on the valve rod, and enabling the fixing piece to be in contact with the first copper sleeve; removing the second locking piece to enable the connecting sleeve and the first copper sleeve to rotate relatively, and limiting the first copper sleeve through the fixing piece to enable the connecting sleeve to be separated from the first copper sleeve; and removing the fixing piece to remove the first copper sleeve from the valve rod. According to the invention, after the fixing piece is used for limiting the first copper sleeve, the connecting sleeve and the valve rod are relatively rotated, and then the connecting sleeve can be separated from the first copper sleeve. The disassembly process of the valve copper sleeve can be completed without other tools or equipment, and the valve copper sleeve disassembly tool is convenient and fast and wide in application range.)

1. a method of disassembling a valve copper sleeve, the valve comprising: the valve comprises a valve seat, a valve core, a valve rod (1), a valve cover (2), a first copper sleeve (3), a connecting sleeve (4) and a hand wheel (5), wherein the valve core is arranged in the valve seat, the valve cover (2) is arranged on the top surface of the valve seat, the first copper sleeve (3) is arranged above the valve cover (2), the connecting sleeve (4) is sleeved on the valve cover (2) and the first copper sleeve (3) in a threaded connection mode, the connecting sleeve (4) and the valve cover (2) are fixed through a first locking part (6), the connecting sleeve (4) and the first copper sleeve (3) are fixed through a second locking part (7), the valve rod (1) penetrates through the first copper sleeve (3) and the valve cover (2) and is connected with the valve core in a threaded connection mode, the hand wheel (5) is fixed on the valve rod (1) through a fixing part (8), the fixing member (8) is in threaded connection with the valve stem (1), characterized in that the method comprises:

101, removing the first locking piece (6), the fixing piece (8) and the hand wheel (5), reinstalling the fixing piece (8) on the valve rod (1), and enabling the fixing piece (8) to be in contact with the first copper sleeve (3);

102, removing the second locking piece (7), enabling the connecting sleeve (4) and the first copper sleeve (3) to rotate relatively, limiting the first copper sleeve (3) through the fixing piece (8), and enabling the connecting sleeve (4) to be separated from the first copper sleeve (3);

And 103, removing the fixing piece (8) to remove the first copper sleeve (3) from the valve rod (1).

2. the method according to claim 1, wherein said reinstalling said fixing element (8) on said valve stem (1) and bringing said fixing element (8) into contact with said first copper bush (3) comprises:

sleeving the fixing piece (8) on the valve rod (1) from the top end of the valve rod (1), and rotating the fixing piece (8) to enable the fixing piece (8) to move downwards to be in contact with the first copper sleeve (3).

3. The method according to claim 1, wherein said reinstalling said fixing element (8) on said valve stem (1) and bringing said fixing element (8) into contact with said first copper bush (3) comprises:

and sleeving the fixing piece (8) on the valve rod (1) from the top end of the valve rod (1), and rotating the fixing piece (8) to the position of the hand wheel (5) to enable the connecting sleeve (4) and the valve rod (1) to rotate relatively, so that the first copper sleeve (3) is in contact with the fixing piece (8).

4. a method according to claim 3, wherein rotating the connecting sleeve (4) and the valve stem (1) relative to each other to bring the first copper sleeve (3) into contact with the fixing member (8) comprises:

Fixing the valve rod (1), rotating the connecting sleeve (4), axially moving the first copper sleeve (3) along with the connecting sleeve (4), and stopping rotating the connecting sleeve (4) after the first copper sleeve (3) is contacted with the fixing piece (8); alternatively, the first and second electrodes may be,

the connecting sleeve (4) is fixed, the valve rod (1) is rotated, the fixing piece (8) moves along with the valve rod (1) in the axial direction, and the valve rod (1) stops rotating after the fixing piece (8) is contacted with the first copper sleeve (3); alternatively, the first and second electrodes may be,

Rotate with first direction adapter sleeve (4), rotate with the opposite second direction of first direction valve rod (1), first copper sheathing (3) are along with adapter sleeve (4) axial displacement, mounting (8) are along with valve rod (1) axial displacement, first copper sheathing (3) with mounting (8) contact the back, stop to rotate adapter sleeve (4) with first valve rod (1).

5. The method according to claim 1, wherein the step of rotating the connecting sleeve (4) and the first copper sleeve (3) relatively to each other, and the step of limiting the first copper sleeve (3) by the fixing member (8) to separate the connecting sleeve (4) from the first copper sleeve (3) comprises the steps of:

the valve rod (1) is fixed, the fixing piece (8) enables the first copper sleeve (3) to follow the valve rod (1) is fixed, the connecting sleeve (4) is rotated to enable the connecting sleeve (4) to move axially, and the connecting sleeve (4) is separated from the first copper sleeve (3).

6. the method according to claim 1, wherein the step of rotating the connecting sleeve (4) and the first copper sleeve (3) relatively to each other, and the step of limiting the first copper sleeve (3) by the fixing member (8) to separate the connecting sleeve (4) from the first copper sleeve (3) comprises the steps of:

the connecting sleeve (4) is fixed, the valve rod (1) is rotated to enable the valve rod (1) to move axially, and the fixing piece (8) enables the first copper sleeve (3) to move along with the valve rod (1), so that the connecting sleeve (4) is separated from the first copper sleeve (3).

7. the method according to claim 1, wherein the step of rotating the connecting sleeve (4) and the first copper sleeve (3) relatively to each other, and the step of limiting the first copper sleeve (3) by the fixing member (8) to separate the connecting sleeve (4) from the first copper sleeve (3) comprises the steps of:

The connecting sleeve (4) is rotated in a first direction to enable the connecting sleeve (4) to move axially, the valve rod (1) is rotated in a second direction opposite to the first direction to enable the valve rod (1) to move axially, and the first copper sleeve (3) moves along with the valve rod (1) through the fixing piece (8), so that the connecting sleeve (4) is separated from the first copper sleeve (3).

8. a valve copper bush replacement method, characterized in that the first copper bush (3) of the valve is disassembled by a method according to any one of claims 1 to 7, the method comprising:

step 201, sleeving a connecting sleeve (4) on a valve rod (1), and sleeving a second copper sleeve (9) on the valve rod (1) in a threaded connection manner, wherein the connecting sleeve (4) is positioned between the second copper sleeve (9) and a valve cover (2);

202, mounting a fixing piece (8) on the valve rod (1), enabling the fixing piece (8) to be in contact with the second copper sleeve (9), and then enabling the second copper sleeve (9) to rotate relative to the connecting sleeve (4), so that the connecting sleeve (4) is sleeved on the second copper sleeve (9) in a threaded connection mode;

203, fixing the second copper sleeve (9) and the connecting sleeve (4) through the second locking piece (7);

step 204, rotating the connecting sleeve (4) to enable the connecting sleeve (4) to be sleeved on the valve cover (2);

Step 205, fixing the connecting sleeve (4) and the valve cover (2) through the first locking piece (6);

And 206, removing the fixing piece (8), installing a hand wheel (5), and reinstalling the fixing piece (8) to fix the hand wheel (5) on the valve rod (1).

9. The method according to claim 8, wherein rotating the second copper sleeve (9) relative to the connecting sleeve (4) to threadably mount the connecting sleeve (4) on the second copper sleeve (9) comprises:

The valve rod (1) is fixed, the second copper sleeve (9) is fixed along with the valve rod (1) through the fixing piece (8), the connecting sleeve (4) is rotated to enable the connecting sleeve (4) to move axially, and the connecting sleeve (4) is sleeved on the second copper sleeve (9); alternatively, the first and second electrodes may be,

the connecting sleeve (4) is fixed, the valve rod (1) is rotated to enable the valve rod (1) to move axially, the second copper sleeve (9) moves along with the valve rod (1) through the fixing piece (8), and the connecting sleeve (4) is sleeved on the second copper sleeve (9); alternatively, the first and second electrodes may be,

The connecting sleeve (4) is rotated in a first direction to enable the connecting sleeve (4) to move axially, the valve rod (1) is rotated in a second direction opposite to the first direction to enable the valve rod (1) to move axially, and the fixing piece (8) enables the second copper sleeve (9) to move along with the valve rod (1), so that the connecting sleeve (4) is sleeved on the second copper sleeve (9).

Technical Field

The invention relates to the field of equipment maintenance, in particular to a valve copper bush dismounting method and a valve copper bush replacing method.

Background

Valves are common devices in the mechanical field, and include: valve seat, case, valve gap, valve rod. The valve core is arranged in the valve seat, the valve cover is arranged at the top end of the valve seat, the valve rod penetrates through the valve cover in a threaded connection mode to extend into the valve seat to be in contact with the valve core, and the valve rod moves up and down in the rotating process to drive the valve core to move up and down to open or close the valve. In order to rotate the valve rod, a hand wheel is fixed on the valve rod through a nut. In order to protect the joint of the valve rod and the valve cover, a copper sleeve is sleeved on the position, above the valve cover, of the valve rod in a threaded connection mode, and a connecting sleeve is sleeved on the copper sleeve and the valve cover in a threaded connection mode. The connecting sleeve is connected with the valve cover through a first locking piece, and the copper sleeve is connected with the connecting sleeve through a second locking piece. When the copper bush is damaged due to abrasion and the like in the using process, the copper bush needs to be disassembled and replaced by a new copper bush.

disclosure of Invention

The embodiment of the invention provides a valve copper bush dismounting method and a valve copper bush replacing method, which can solve the technical problems. The specific technical scheme is as follows:

in a first aspect, a method for disassembling a copper sleeve of a valve is provided, where the valve includes: disk seat, case, valve rod, valve gap, first copper sheathing, adapter sleeve and hand wheel, the case sets up in the disk seat, the valve gap sets up on the top surface of disk seat, first copper sheathing, setting are in the valve gap top, the adapter sleeve with threaded connection mode suit the valve gap with on the first copper sheathing, the adapter sleeve with the valve gap is fixed through first retaining member, the adapter sleeve with first copper sheathing is fixed through the second retaining member, the valve rod passes with threaded connection mode first copper sheathing with the valve gap with the case is connected, the hand wheel passes through the mounting to be fixed on the valve rod, the mounting with valve rod threaded connection, the method includes:

removing the first retaining member, the retainer and the hand wheel, reinstalling the retainer on the valve stem and bringing the retainer into contact with the first copper sleeve;

removing the second locking piece to enable the connecting sleeve and the first copper sleeve to rotate relatively, and limiting the first copper sleeve through the fixing piece to enable the connecting sleeve to be separated from the first copper sleeve;

And removing the fixing piece to remove the first copper sleeve from the valve rod.

In one possible design, the reinstalling the fixing on the valve stem and bringing the fixing into contact with the first copper bush includes:

sleeving the fixing piece on the valve rod from the top end of the valve rod, and rotating the fixing piece to enable the fixing piece to move downwards to be in contact with the first copper sleeve.

In one possible design, the reinstalling the fixing on the valve stem and bringing the fixing into contact with the first copper bush includes:

And sleeving the fixing piece on the valve rod from the top end of the valve rod, and rotating the fixing piece to the position of the hand wheel to enable the connecting sleeve and the valve rod to rotate relatively, so that the first copper sleeve is in contact with the fixing piece.

In a possible design, the rotating the connection sleeve and the valve rod relatively to make the first copper sleeve contact with the fixing member includes:

fixing the valve rod, rotating the connecting sleeve, axially moving the first copper sleeve along with the connecting sleeve, and stopping rotating the connecting sleeve after the first copper sleeve is contacted with the fixing piece; alternatively, the first and second electrodes may be,

fixing the connecting sleeve, rotating the valve rod, enabling the fixing piece to move axially along with the valve rod, and stopping rotating the valve rod after the fixing piece is connected with the first copper sleeve; alternatively, the first and second electrodes may be,

The connecting sleeve is rotated in a first direction, the valve rod is rotated in a second direction opposite to the first direction, the first copper sleeve moves along with the connecting sleeve in the axial direction, the fixing piece moves along with the valve rod in the axial direction, and after the first copper sleeve is contacted with the fixing piece, the connecting sleeve and the first valve rod stop rotating.

in a possible design, making the connecting sleeve rotate relatively to the first copper sleeve, limiting the first copper sleeve through the fixing member, and making the connecting sleeve separate from the first copper sleeve, includes:

the valve rod is fixed, the first copper sleeve is fixed along with the valve rod through the fixing piece, the connecting sleeve is rotated to enable the connecting sleeve to move axially, and the connecting sleeve is separated from the first copper sleeve.

In a possible design, making the connecting sleeve rotate relatively to the first copper sleeve, limiting the first copper sleeve through the fixing member, and making the connecting sleeve separate from the first copper sleeve, includes:

The connecting sleeve is fixed, the valve rod is rotated to enable the valve rod to move axially, and the first copper sleeve moves along with the valve rod through the fixing piece, so that the connecting sleeve is separated from the first copper sleeve.

In a possible design, making the connecting sleeve rotate relatively to the first copper sleeve, limiting the first copper sleeve through the fixing member, and making the connecting sleeve separate from the first copper sleeve, includes:

the connecting sleeve is rotated in a first direction to enable the connecting sleeve to move axially, the valve rod is rotated in a second direction opposite to the first direction to enable the valve rod to move axially, and the first copper sleeve moves along with the valve rod through the fixing piece to enable the connecting sleeve to be separated from the first copper sleeve.

In a second aspect, there is provided a method of replacing a valve copper sleeve, the first copper sleeve of the valve being removed by a method as defined in any one of the preceding claims, the method comprising:

sleeving a connecting sleeve on the valve rod, and sleeving a second copper sleeve on the valve rod in a threaded connection manner, wherein the connecting sleeve is positioned between the second copper sleeve and the valve cover;

mounting a fixing piece on the valve rod, enabling the fixing piece to be in contact with the second copper sleeve, and then enabling the second copper sleeve and the connecting sleeve to rotate relatively, so that the connecting sleeve is sleeved on the second copper sleeve in a threaded connection mode;

the second copper sleeve and the connecting sleeve are fixed through the second locking piece;

Rotating the connecting sleeve to enable the connecting sleeve to be sleeved on the valve cover;

the connecting sleeve is fixed with the valve cover through the first locking piece;

And removing the fixing piece, installing a hand wheel, and reinstalling the fixing piece to fix the hand wheel on the valve rod.

in a possible design, rotating the second copper sleeve and the connecting sleeve relatively to each other to enable the connecting sleeve to be sleeved on the second copper sleeve in a threaded connection manner includes:

fixing the valve rod, fixing the second copper sleeve along with the valve rod through the fixing piece, rotating the connecting sleeve to enable the connecting sleeve to move axially, and enabling the connecting sleeve to be sleeved on the second copper sleeve; alternatively, the first and second electrodes may be,

fixing the connecting sleeve, rotating the valve rod to enable the valve rod to move axially, and enabling the second copper sleeve to move along with the valve rod through the fixing piece to enable the connecting sleeve to be sleeved on the second copper sleeve; alternatively, the first and second electrodes may be,

the connecting sleeve is rotated in a first direction to enable the connecting sleeve to move axially, the valve rod is rotated in a second direction opposite to the first direction to enable the valve rod to move axially, the second copper sleeve moves along with the valve rod through the fixing piece, and the connecting sleeve is sleeved on the second copper sleeve.

the technical scheme provided by the embodiment of the invention has the beneficial effects that at least:

According to the valve copper bush dismounting method provided by the embodiment of the invention, after the first copper bush is limited by the fixing piece, the connecting sleeve and the valve rod are relatively rotated, and then the connecting sleeve can be separated from the first copper bush. The disassembly process of the valve copper sleeve can be completed without other tools or equipment, and the valve copper sleeve disassembly tool is convenient and fast and wide in application range.

drawings

in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

fig. 1 is a schematic partial structural view of a valve before a first copper bush is detached or after a second copper bush is installed according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for disassembling a copper sleeve of a valve according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for installing a valve copper bush according to an embodiment of the present invention.

the reference numerals denote:

1-a valve rod, wherein the valve rod is provided with a valve core,

2-the valve cover is arranged on the valve body,

3-a first copper bush, wherein the first copper bush is a copper bush,

4-a connecting sleeve is arranged on the upper portion of the main body,

5-a hand wheel is arranged on the upper portion of the frame,

6-the first locking piece is fixed on the base,

7-a second locking piece, wherein the second locking piece is provided with a locking groove,

8-a fixing part is arranged on the upper surface of the frame,

9-second copper sheathing.

Detailed Description

Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the valve according to the embodiment of the present invention includes: the disk seat, the case, valve rod 1, valve gap 2, first copper sheathing 3, adapter sleeve 4 and hand wheel 5, the case sets up in the disk seat, valve gap 2 sets up on the top surface of disk seat, first copper sheathing 3 sets up in valve gap 2 top, adapter sleeve 4 is with threaded connection mode suit on valve gap 2 and first copper sheathing 3, adapter sleeve 4 is fixed through first retaining member 6 with valve gap 2, adapter sleeve 4 is fixed through second retaining member 7 with first copper sheathing 3, valve rod 1 passes first copper sheathing 3 and valve gap 2 with the threaded connection mode and is connected with the case, hand wheel 5 passes through mounting 8 and fixes on valve rod 1, mounting 8 and 1 threaded connection of valve rod.

Wherein, first retaining member 6 and second retaining member 7 can be the locating pin, are provided with the through-hole on first copper sheathing 3, valve gap 2 and the adapter sleeve 4, and the back is gone up at first copper sheathing 3 and valve gap 2 to the adapter sleeve 4 suit, and the through-hole on the valve gap 2 aligns with a through-hole on the adapter sleeve 4, and the through-hole on the first copper sheathing 3 aligns with another through-hole on the adapter sleeve 4. The first locking piece 6 passes through a through hole in the connecting sleeve 4 and a through hole in the valve cover 2 to fix the valve cover 2 and the connecting sleeve 4, so that the valve cover 2 and the connecting sleeve 4 are prevented from rotating relatively. The second locking piece 7 penetrates through another through hole in the connecting sleeve 4 and the through hole in the second copper sleeve 9 to fix the second copper sleeve 9 and the connecting sleeve 4, so that relative rotation of the copper sleeve and the connecting sleeve 4 is avoided. The first locking member 6 can be removed by removing the first locking member 6 from a through hole in the connection sleeve 4 and a through hole in the valve cover 2. The second locking member 7 can be removed by taking the second locking member 7 out of another through hole in the connecting sleeve 4 and the through hole in the second copper sleeve 9.

further, the locating pin can be the screw rod, and correspondingly, the through-hole on first copper sheathing 3, valve gap 2 and the adapter sleeve 4 is the internal thread hole, so set up, can make the inserting of locating pin and take out more convenient, and can insert the difficult through-hole that breaks away from when having no external force in the back.

in a first aspect, an embodiment of the present invention provides a method for detaching a valve copper bush, as shown in fig. 2, the method includes:

Step 101, removing the first locking piece 6, the fixing piece 8 and the hand wheel 5, reinstalling the fixing piece 8 on the valve rod 1, and enabling the fixing piece 8 to be in contact with the first copper sleeve 3;

102, removing the second locking piece 7, enabling the connecting sleeve 4 and the first copper sleeve 3 to rotate relatively, and limiting the first copper sleeve 3 through the fixing piece 8 to enable the connecting sleeve 4 to be separated from the first copper sleeve 3;

Step 103, removing the fixing member 8, so that the first copper bush 3 is removed from the valve rod 1.

when the valve copper bush dismounting method provided by the embodiment of the invention is used for dismounting the first copper bush 3, the first locking piece 6 is firstly removed, so that the connecting sleeve 4 and the valve cover 2 are released from fixing, and the connecting sleeve 4 is convenient to move subsequently. The fixing 8 and the hand wheel 5 are removed so that the hand wheel 5 does not hinder the disassembly process. The fixing member 8 is remounted on the valve rod 1 and the fixing member 8 is brought into contact with the first copper bush 3, the second locking member 7 is removed, the fixation of the copper bush and the connecting sleeve 4 is released, and then the connecting sleeve 4 is rotated relative to the first copper bush 3. Because the fixing piece 8 is contacted with the first copper sleeve 3, the axial movement of the first copper sleeve 3 on the valve rod 1 is limited, and when the connecting sleeve 4 and the first copper sleeve 3 rotate relatively, the connecting sleeve 4 and the copper sleeve generate relative displacement in the axial direction, so that the connecting sleeve 4 is separated from the first copper sleeve 3. Then the fixing part 8 is removed, the first copper bush 3 is removed from the valve rod 1 by rotating the copper bush, and the copper bush dismounting process can be completed.

Therefore, according to the valve copper bush dismounting method provided by the embodiment of the invention, after the fixing piece 8 is used for limiting the first copper bush 3, the connecting sleeve 4 and the valve rod 1 are relatively rotated, and then the connecting sleeve 4 can be separated from the first copper bush 3. The disassembly process of the valve copper sleeve can be completed without other tools or equipment, and the valve copper sleeve disassembly tool is convenient and fast and wide in application range.

With respect to how the above-mentioned fixing member 8 is remounted on the valve rod 1 and the fixing member 8 is brought into contact with the first copper bush 3, the following description is given by way of example:

As an example, the fixing member 8 is fitted over the valve stem 1 from the top end of the valve stem 1, and the fixing member 8 is rotated to move the fixing member 8 downward into contact with the first copper bush 3. By directly rotating the fixing part 8 to the top end of the first copper sleeve 3 in this way, the process of separating the connecting sleeve 4 from the first copper sleeve 3 and the process of separating the connecting sleeve from the valve cover 2 are synchronously carried out.

as another example, the fixing member 8 is sleeved on the valve rod 1 from the top end of the valve rod 1, and the fixing member 8 is rotated to the position of the hand wheel 5, so that the connecting sleeve 4 and the valve rod 1 are relatively rotated, and the first copper sleeve 3 is contacted with the fixing member 8. Through this kind of mode, the rotation stroke when can reducing 8 installations of mounting and dismantlements shortens the dismantlement time of first copper sheathing 3. And in this example, when the connecting sleeve 4 and the valve rod 1 rotate relatively, the connecting sleeve 4 is firstly separated from the valve cover 2 and then moves axially on the valve rod 1, and after the first copper sleeve 3 contacts the fixing piece 8, the connecting sleeve 4 and the first copper sleeve 3 start to be separated.

wherein, make adapter sleeve 4 and valve rod 1 relative rotation, make first copper sheathing 3 and mounting 8 contact, can include following several kinds of modes:

the valve rod 1 is fixed, the connecting sleeve 4 is rotated, the first copper sleeve 3 moves axially along with the connecting sleeve 4, and the connecting sleeve 4 stops rotating after the first copper sleeve 3 is contacted with the fixing piece 8; alternatively, the first and second electrodes may be,

the connecting sleeve 4 is fixed, the valve rod 1 is rotated, the fixing piece 8 moves along with the valve rod 1 in the axial direction, and the valve rod 1 stops rotating after the fixing piece 8 is contacted with the first copper sleeve 3; alternatively, the first and second electrodes may be,

The connecting sleeve 4 is rotated in the first direction, the valve rod 1 is rotated in the second direction opposite to the first direction, the first copper sleeve 3 moves axially along with the connecting sleeve 4, the fixing piece 8 moves axially along with the valve rod 1, and after the first copper sleeve 3 is contacted with the fixing piece 8, the connecting sleeve 4 and the first valve rod 1 are stopped to rotate.

The relative movement of the connecting sleeve 4 and the valve rod 1 can be realized by the above modes, and the rotation difficulty is different according to the weight, the volume and other factors of the valve rod 1 and the connecting sleeve 4. For example, if the ratio of the mass of the valve stem 1 to the mass of the connecting sleeve 4 is greater than or equal to 10, it is preferable to fix the valve stem 1 and rotate the connecting sleeve 4 in a manner that makes the relative rotation of the two less labor-saving. An operator can select a proper rotation mode according to field conditions, working conditions and the like, and the embodiment of the invention is not listed.

fixing member 8 and first copper sheathing 3 contact the back, make adapter sleeve 4 and first copper sheathing 3 relative rotation, carry on spacingly through fixing member 8 to first copper sheathing 3, make adapter sleeve 4 break away from first copper sheathing 3, this process can have multiple operation, explains the operation of difference below:

In the first operation mode, the valve rod 1 is fixed, the first copper sleeve 3 is fixed along with the valve rod 1 through the fixing piece 8, the connecting sleeve 4 is rotated to enable the connecting sleeve 4 to move axially, and the connecting sleeve 4 is separated from the first copper sleeve 3.

In the second operation mode, the connecting sleeve 4 is fixed, the valve rod 1 is rotated to axially move the valve rod 1, and the first copper sleeve 3 moves along with the valve rod 1 through the fixing piece 8, so that the connecting sleeve 4 is separated from the first copper sleeve 3.

in a third operation mode, the connecting sleeve 4 is rotated in a first direction to axially move the connecting sleeve 4, the valve rod 1 is rotated in a second direction opposite to the first direction to axially move the valve rod 1, and the first copper sleeve 3 moves along with the valve rod 1 through the fixing piece 8 to separate the connecting sleeve 4 from the first copper sleeve 3.

the three operation modes can enable the connecting sleeve 4 and the first copper sleeve 3 to find relative rotation, and due to the threaded connection of the connecting sleeve 4 and the first copper sleeve 3, the connecting sleeve 4 and the first copper sleeve 3 are separated by relative axial displacement generated during relative rotation. And under different site conditions and working conditions, the convenient degree and the labor intensity of different operation modes are different, and an operator can select a proper operation mode according to the site conditions and the working conditions so as to ensure that the disassembly process is convenient and labor-saving.

in a second aspect, an embodiment of the present invention provides a method for replacing a copper sleeve of a valve, in which a first copper sleeve 3 of the valve is disassembled by any one of the methods described above, as shown in fig. 3, the method includes:

Step 201, sleeving a connecting sleeve 4 on a valve rod 1, and sleeving a second copper sleeve 9 on the valve rod 1 in a threaded connection manner, wherein the connecting sleeve 4 is positioned between the second copper sleeve 9 and a valve cover 2;

Step 202, mounting the fixing piece 8 on the valve rod 1, enabling the fixing piece 8 to be in contact with the second copper sleeve 9, and then enabling the second copper sleeve 9 and the connecting sleeve 4 to rotate relatively, so that the connecting sleeve 4 is sleeved on the second copper sleeve 9 in a threaded connection mode;

step 203, fixing the second copper sleeve 9 and the connecting sleeve 4 through the second locking piece 7;

Step 204, rotating the connecting sleeve 4 to enable the connecting sleeve 4 to be sleeved on the valve cover 2;

step 205, fixing the connecting sleeve 4 and the valve cover 2 through the first locking piece 6;

And step 206, removing the fixing piece 8, installing the hand wheel 5, and reinstalling the fixing piece 8 to fix the hand wheel 5 on the valve rod 1.

the installation process of the second copper sleeve 9 is completed through the steps, the connecting sleeve 4 and the valve rod 1 can rotate relatively to complete the connection of the second copper sleeve 9 and the connecting sleeve 4 through the limiting effect of the fixing piece 8, the installation of the second copper sleeve 9 and the connecting sleeve 4 can be completed without other tools and equipment, and the installation process is convenient.

For how to make the second copper sleeve 9 and the connecting sleeve 4 rotate relatively, the connecting sleeve 4 is sleeved on the second copper sleeve 9 in a threaded connection mode:

As an example, the valve rod 1 is fixed, the second copper sleeve 9 is fixed with the valve rod 1 through the fixing piece 8, and the connecting sleeve 4 is rotated to axially move the connecting sleeve 4, so that the connecting sleeve 4 is sleeved on the second copper sleeve 9.

as another example, the connecting sleeve 4 is fixed, the valve rod 1 is axially moved by rotating the valve rod 1, the first copper sleeve 3 is moved along with the valve rod 1 by the fixing member 8, and the connecting sleeve 4 is sleeved on the second copper sleeve 9.

As another example, the connecting sleeve 4 is rotated in a first direction to axially move the connecting sleeve 4, the valve rod 1 is rotated in a second direction opposite to the first direction to axially move the valve rod 1, and the second copper sleeve 9 is moved along with the valve rod 1 by the fixing member 8, so that the connecting sleeve 4 is sleeved on the second copper sleeve 9.

The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.