Quick assembly process for plug valve seat

Abstract

The present application relates to a kind of cock valve seat quick assembly process, comprising the following steps: the small end of guide sleeve is installed at the flange of cock valve body;First, valve seat is loaded into the conical shaft hole of guide sleeve from above guide sleeve, then valve seat is pressed into guide sleeve using the big end of pressure block, finally valve seat is pressed into the inner cavity of cock valve body using the small end of pressure block;First, split support block assembly is placed into valve seat, then wedge-shaped block is inserted into wedge-shaped slot between two split support blocks, split support block assembly is opened by pressing wedge-shaped block, so that valve seat is opened;First, cone plug is installed in valve seat, then cone plug is pressed by external force, so that valve seat is opened, finally cone plug is pulled out.The present application ensures the relative position accuracy of valve seat and valve body, valve seat and pressure block, reduces unsafe factors, can guarantee the sealing performance of valve seat, and effectively improves the assembly efficiency of valve seat.

Description

TECHNICAL FIELD

[0001] The application belongs to a kind of soft sealing cock valve seat assembly process, and specifically discloses a kind of cock valve seat quick assembly process. BACKGROUND

[0002] The cock valve is a kind of valve that controls fluid on-off by rotating plug. In the assembly process of soft sealing cock valve, the assembly effect of valve seat directly affects the sealing performance and operating torque of valve. When the valve seat is assembled, the position of the valve seat is prone to change under pressure, which forms an unsafe factor. At the same time, in order to ensure the sealing performance of the valve, the valve seat needs to be pressed multiple times, and the tooling needs to be frequently switched, which is complex, time-consuming and inefficient. SUMMARY

[0003] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a kind of cock valve seat quick assembly process with simple process, less time-consuming and high efficiency.

[0004] According to the technical scheme provided by the present application, the cock valve seat quick assembly process comprises the following steps:

[0005] S1, the small end of the guide sleeve is installed at the flange of the cock valve body, the guide sleeve has a conical shaft hole, and in the direction from top to bottom, the hole diameter of the conical shaft hole of the guide sleeve is gradually reduced;

[0006] S2, first, the valve seat is assembled into the conical shaft hole of the guide sleeve from above, then the valve seat is pressed into the guide sleeve by the large end of the pressing block, and finally the valve seat is pressed into the inner cavity of the cock valve body by the small end of the pressing block; the pressing block is a stepped cylinder, the diameter of the large end of the pressing block is greater than the upper end diameter of the valve seat, the diameter of the small end of the pressing block is less than the lower end diameter of the conical shaft hole of the guide sleeve, and the small end of the pressing block and the lower end of the conical shaft hole of the guide sleeve are in clearance fit;

[0007] S3, first, the split support block assembly is put into the valve seat, the split support block assembly is composed of two split support blocks, a wedge-shaped groove is arranged between the two split support blocks, then the wedge-shaped block is inserted into the wedge-shaped groove between the two split support blocks, the wedge-shaped block is pressed down by external force, the split support block assembly is opened, then the wedge-shaped block is repeatedly lifted, the split support block assembly is rotated, and then the wedge-shaped block is pressed down again, so that the wedge-shaped groove is rotated by 180°, the sealing area of the valve seat is extruded by the split support block assembly, so as to ensure the sealing performance of the valve seat, and finally the wedge-shaped block is lifted and the split support block assembly is removed;

[0008] S4, first, the tapered plug is installed in the valve seat, then the tapered plug is pressed down by external force, the tapered plug is opened, the valve seat is extruded again, the valve seat is further closely fitted with the inner cavity of the valve body, so as to ensure the sealing performance of the valve seat, and finally the tapered plug is pulled out, the cock valve seat quick assembly process is completed.

[0009] As preferred, a connecting block and a lifting screw are also used in step S3 and step S4, the connecting block comprises a connecting block top plate, a connecting block connecting side plate and a connecting block bottom plate fixed integrally from top to bottom, a lifting screw mounting gap is opened on the connecting block top plate, and an outward expansion component mounting gap is opened on the connecting block bottom plate;

[0010] The width of the bolt head part of the lifting screw is greater than the width of the lifting screw mounting gap, and the screw rod part of the lifting screw is in clearance fit with the lifting screw mounting gap.

[0011] As preferred, the wedge block comprises a wedge block body, a wedge block connecting bottom plate, a wedge block connecting column and a wedge block connecting top plate fixed integrally from bottom to top;

[0012] The width of the wedge block connecting bottom plate and the wedge block connecting top plate is greater than the width of the outward expansion component mounting gap, and the wedge block connecting column is in fit with the outward expansion component mounting gap; after the wedge block connecting column is moved into the outward expansion component mounting gap, the top surface of the wedge block connecting bottom plate and the bottom surface of the connecting block bottom plate are in clearance fit, and the bottom surface of the wedge block connecting top plate and the top surface of the connecting block top plate are in clearance fit.

[0013] Further preferably, when the wedge block needs to be pressed down, the wedge block connecting column on the wedge block is first moved into the outward expansion component mounting gap on the connecting block, and then the pressing head of the press is pressed downward on the top surface of the connecting block top plate, so that the wedge block can be pressed down;

[0014] When the wedge block needs to be pulled up, the screw rod part of the lifting screw is first screwed upward into the pressing head of the press, then the pressing head of the press is driven to move the lifting screw into the lifting screw mounting gap, and finally the pressing head of the press is driven to rise, so that the wedge block can be pulled up.

[0015] As preferred, the taper plug comprises a taper plug body, a taper plug connecting column and a taper plug connecting top plate fixed integrally from bottom to top;

[0016] The width of the taper plug connecting top plate is greater than the width of the outward expansion component mounting gap, and after the taper plug connecting column is moved into the outward expansion component mounting gap, the top surface of the taper plug body and the bottom surface of the connecting block bottom plate are in clearance fit, and the bottom surface of the taper plug connecting top plate and the top surface of the connecting block top plate are in clearance fit;

[0017] Further preferably, when the taper plug needs to be pressed down, the taper plug connecting column on the taper plug is first moved into the outward expansion component mounting gap on the connecting block, and then the pressing head of the press is pressed downward on the top surface of the connecting block top plate, so that the taper plug can be pressed down;

[0018] When the plug needs to be pulled up, first, the screw rod part of the lifting screw is screwed into the press head of the press in an upward direction, then the press head of the press is driven to move the lifting screw into the lifting screw mounting gap, and finally the press head of the press is driven to rise, so that the plug can be pulled up.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. The present application ensures the accuracy of the relative positions of the valve seat and the valve body and the valve seat and the pressing block, reduces unsafe factors, and effectively improves the valve seat assembly efficiency.

[0021] 2. The present application can ensure the sealing performance of the valve seat and effectively improve the valve seat assembly efficiency.

[0022] 3. The present application can reduce the operation during the pressing and lifting of the wedge-shaped block and the plug, and can quickly disassemble and assemble when replacing the wedge-shaped block and the plug, effectively improving the valve seat assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the guide sleeve mounted on the valve body of the plug valve.

[0024] Figure 2 is a structural schematic view of the valve seat being pressed into the inner cavity of the valve body of the plug valve.

[0025] Figure 3 is a structural schematic view of the valve seat being pressed by the split support block assembly and the wedge-shaped block.

[0026] Figure 4 is a structural schematic view of the valve seat being pressed by the plug. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] A plug valve valve seat rapid assembly process, the process comprising the following steps:

[0029] S1, the small end of the guide sleeve 1 is installed at the flange of the plug valve valve body 8, the guide sleeve 1 has a conical shaft hole, and in the direction from top to bottom, the hole diameter of the conical shaft hole of the guide sleeve 1 is gradually reduced, as shown in Figure 1 ;

[0030] S2, first, the valve seat 9 is installed in the conical shaft hole of the guide sleeve 1 from above, then the large end of the pressing block 2 is used to press the valve seat 9 into the guide sleeve 1, and finally the small end of the pressing block 2 is used to press the valve seat 9 into the inner cavity of the plug valve body 8; the pressing block 2 is a stepped cylinder, the diameter of the large end of the pressing block 2 is greater than the diameter of the upper end of the valve seat 9, and the diameter of the small end of the pressing block 2 is smaller than the diameter of the lower end of the conical shaft hole of the guide sleeve 1, and the small end of the pressing block 2 is in clearance fit with the lower end of the conical shaft hole of the guide sleeve 1, as shown in Figure 2 ;

[0031] S3, first, the split support block assembly 3 is placed into the valve seat 9, the split support block assembly 3 is composed of two split support blocks, a wedge-shaped groove 3.1 is arranged between the two split support blocks, then the wedge-shaped block 4 is inserted into the wedge-shaped groove 3.1 between the two split support blocks, the wedge-shaped block 4 is pressed downward by external force, the split support block assembly 3 is opened, then the wedge-shaped block 4 is repeatedly lifted, the split support block assembly 3 is rotated, and then the wedge-shaped block 4 is pressed again, the wedge-shaped groove 3.1 is rotated by 180°, the sealing area of the valve seat 9 is extruded by the split support block assembly 3, so as to ensure the sealing performance of the valve seat 9, finally the wedge-shaped block 4 is lifted and the split support block assembly 3 is removed, as shown in Figure 3 ;

[0032] S4, first, the tapered plug 5 is installed in the valve seat 9, then the tapered plug 5 is pressed downward by external force, the tapered plug 5 is opened, the valve seat 9 is extruded again, the valve seat 9 is further closely attached to the inner cavity of the valve body 8, so as to ensure the sealing performance of the valve seat 9, finally the tapered plug 5 is pulled out, the plug valve valve seat rapid assembly process is completed, as shown in Figure 4 .

[0033] The connecting block 6 and the lifting screw 7 are also used in steps S3 and S4, the connecting block 6 includes a connecting block top plate 6.1, a connecting block connecting side plate 6.2 and a connecting block bottom plate 6.3 fixed integrally from top to bottom, a lifting screw installation gap 6.11 is arranged on the connecting block top plate 6.1, and an outwardly expanded component installation gap 6.31 is arranged on the connecting block bottom plate 6.3;

[0034] The width of the bolt head part of the lifting screw 7 is greater than the width of the lifting screw installation gap 6.11, and the screw rod part of the lifting screw 7 is in clearance fit with the lifting screw installation gap 6.11.

[0035] The wedge-shaped block 4 includes a wedge-shaped block body 4.1, a wedge-shaped block connecting bottom plate 4.2, a wedge-shaped block connecting column 4.3 and a wedge-shaped block connecting top plate 4.4 fixed integrally from bottom to top;

[0036] The width of the wedge connecting bottom plate 4.2 and the wedge connecting top plate 4.4 is greater than the width of the outwardly expanded component mounting gap 6.31, and the wedge connecting column 4.3 is matched with the outwardly expanded component mounting gap 6.31; after the wedge connecting column 4.3 is moved into the outwardly expanded component mounting gap 6.31, the top surface of the wedge connecting bottom plate 4.2 and the bottom surface of the connecting block bottom plate 6.3 are in gap cooperation, and the bottom surface of the wedge connecting top plate 4.4 and the top surface of the connecting block top plate 6.1 are in gap cooperation.

[0037] When the wedge 4 needs to be pressed down, the wedge connecting column 4.3 on the wedge 4 is first moved into the outwardly expanded component mounting gap 6.31 on the connecting block 6, and then the pressure head of the press is pressed downward on the top surface of the connecting block top plate 6.1, so that the wedge 4 can be pressed down;

[0038] When the wedge 4 needs to be pulled up, the screw rod part of the lifting screw 7 is first screwed upward into the pressure head of the press, and then the pressure head of the press is driven to move the lifting screw 7 into the lifting screw mounting gap 6.11, and finally the pressure head of the press is driven to rise, so that the wedge 4 can be pulled up.

[0039] The taper plug 5 comprises a taper plug body 5.1, a taper plug connecting column 5.2 and a taper plug connecting top plate 5.3 fixed and integrated from bottom to top;

[0040] The width of the taper plug connecting top plate 5.3 is greater than the width of the outwardly expanded component mounting gap 6.31, and after the taper plug connecting column 5.2 is moved into the outwardly expanded component mounting gap 6.31, the top surface of the taper plug body 5.1 and the bottom surface of the connecting block bottom plate 6.3 are in gap cooperation, and the bottom surface of the taper plug connecting top plate 5.3 and the top surface of the connecting block top plate 6.1 are in gap cooperation;

[0041] When the taper plug 5 needs to be pressed down, the taper plug connecting column 5.2 on the taper plug 5 is first moved into the outwardly expanded component mounting gap 6.31 on the connecting block 6, and then the pressure head of the press is pressed downward on the top surface of the connecting block top plate 6.1, so that the taper plug 5 can be pressed down;

[0042] When the taper plug 5 needs to be pulled up, the screw rod part of the lifting screw 7 is first screwed upward into the pressure head of the press, and then the pressure head of the press is driven to move the lifting screw 7 into the lifting screw mounting gap 6.11, and finally the pressure head of the press is driven to rise, so that the taper plug 5 can be pulled up.

[0043] The guide sleeve 1 in the application guides the valve seat 9 and the pressing block 2, ensures the accuracy of the relative positions of the valve seat 9 and the valve body 8 and the valve seat 9 and the pressing block 2, reduces unsafe factors, and effectively improves the assembly efficiency of the valve seat 9;

[0044] The split support block assembly 3 and the taper plug 5 in the application press the valve seat 9 twice, first, the wedge block 4 is pressed by the press, the split support block is opened outward, the valve seat 9 is pressed to make the valve seat 9 fit closely with the inner cavity of the valve body 8. Then the taper plug 5 is pressed by the press, the valve seat 9 is pressed again, the valve seat 9 is further fit closely with the inner cavity of the valve body 8, and the sealing performance of the valve seat 9 is ensured. The split support block assembly 3 and the taper plug 5 are used respectively to press the sealing area of the valve seat 9, the sealing performance of the valve seat 9 is ensured, and the assembly efficiency of the valve seat 9 is effectively improved.

[0045] The connecting block 6 of the application adopts an open mounting structure, which can reduce the operation in the process of pressing and lifting the wedge block 4 and the taper plug 5, and can be quickly disassembled when the wedge block 4 and the taper plug 5 are replaced, thereby effectively improving the assembly efficiency of the valve seat 9.

[0046] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the application and are not limiting. Although the application has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the application, and they should be covered in the scope of the claims of the application.

Claims

1. A process for rapid assembly of a plug valve seat, characterized by The process comprises the following steps: S1, the small end of the guide sleeve (1) is installed at the flange of the valve body (8) of the plug valve, the guide sleeve (1) has a conical shaft hole, and the hole diameter of the conical shaft hole of the guide sleeve (1) is gradually reduced in the upward direction; S2, first, the valve seat (9) is installed in the conical shaft hole of the guide sleeve (1) from above, then the large end of the pressing block (2) is used to press the valve seat (9) into the guide sleeve (1), and finally the small end of the pressing block (2) is used to press the valve seat (9) into the inner cavity of the plug valve valve body (8); the pressing block (2) is a stepped cylinder, the diameter of the large end of the pressing block (2) is greater than the diameter of the upper end of the valve seat (9), the diameter of the small end of the pressing block (2) is smaller than the diameter of the lower end of the conical shaft hole of the guide sleeve (1), and the small end of the pressing block (2) is in clearance fit with the lower end of the conical shaft hole of the guide sleeve (1); S3, first, the split support block assembly (3) is put into the valve seat (9), the split support block assembly (3) is composed of two split support blocks, a wedge-shaped groove (3.1) is arranged between the two split support blocks, then the wedge-shaped block (4) is inserted into the wedge-shaped groove (3.1) between the two split support blocks, the wedge-shaped block (4) is pressed downward by external force, the split support block assembly (3) is opened, then the wedge-shaped block (4) is repeatedly lifted, the split support block assembly (3) is rotated and then the wedge-shaped block (4) is pressed again, the wedge-shaped groove (3.1) is rotated by 180°, the sealing area of the valve seat (9) is extruded by the split support block assembly (3) to ensure the sealing performance of the valve seat (9), and finally the wedge-shaped block (4) is lifted and the split support block assembly (3) is removed; S4, first, the tapered plug (5) is installed in the valve seat (9), then the tapered plug (5) is pressed downward by external force, the tapered plug (5) is opened, the valve seat (9) is extruded again, the valve seat (9) is further tightly fitted with the inner cavity of the valve body (8) to ensure the sealing performance of the valve seat (9), and finally the tapered plug (5) is pulled out, the plug valve valve seat rapid assembly process is completed.

2. The process of claim 1 wherein the step of The connecting block (6) and the lifting screw (7) are also used in steps S3 and S4, the connecting block (6) comprises a connecting block top plate (6.1), a connecting block connecting side plate (6.2) and a connecting block bottom plate (6.3) fixed integrally from top to bottom, a lifting screw mounting gap (6.11) is formed in the connecting block top plate (6.1), and an outwardly expanding component mounting gap (6.31) is formed in the connecting block bottom plate (6.3); The width of the bolt head part of the lifting screw (7) is greater than the width of the lifting screw mounting gap (6.11), and the screw rod part of the lifting screw (7) is in clearance fit with the lifting screw mounting gap (6.11).

3. The process of claim 2 wherein: The wedge-shaped block (4) comprises a wedge-shaped block body (4.1), a wedge-shaped block connecting bottom plate (4.2), a wedge-shaped block connecting column (4.3) and a wedge-shaped block connecting top plate (4.4) fixed integrally from bottom to top; The width of the wedge connecting bottom plate (4.2) and the wedge connecting top plate (4.4) is greater than the width of the outwardly expanded component mounting gap (6.31), and the wedge connecting column (4.3) is matched with the outwardly expanded component mounting gap (6.31); after the wedge connecting column (4.3) is moved into the outwardly expanded component mounting gap (6.31), the top surface of the wedge connecting bottom plate (4.2) and the bottom surface of the connecting block bottom plate (6.3) are in gap matching, and the bottom surface of the wedge connecting top plate (4.4) and the top surface of the connecting block top plate (6.1) are in gap matching.

4. The process of claim 3 wherein: When the wedge (4) needs to be pressed down, the wedge connecting column (4.3) on the wedge (4) is first moved into the outwardly expanded component mounting gap (6.31) on the connecting block (6), and then the pressure head of the press is pressed on the top surface of the connecting block top plate (6.1), so that the wedge (4) can be pressed down; When the wedge (4) needs to be pulled up, the screw rod part of the lifting screw (7) is first screwed into the pressure head of the press, and then the pressure head of the press is driven to move the lifting screw (7) into the lifting screw mounting gap (6.11), and finally the pressure head of the press is driven to rise, so that the wedge (4) can be pulled up.

5. The process of claim 2 wherein: The taper plug (5) comprises a taper plug body (5.1), a taper plug connecting column (5.2) and a taper plug connecting top plate (5.3) fixed integrally from bottom to top; The width of the taper plug connecting top plate (5.3) is greater than the width of the outwardly expanded component mounting gap (6.31), and after the taper plug connecting column (5.2) is moved into the outwardly expanded component mounting gap (6.31), the top surface of the taper plug body (5.1) and the bottom surface of the connecting block bottom plate (6.3) are in gap matching, and the bottom surface of the taper plug connecting top plate (5.3) and the top surface of the connecting block top plate (6.1) are in gap matching.

6. The process of claim 5 wherein: When the taper plug (5) needs to be pressed down, the taper plug connecting column (5.2) on the taper plug (5) is first moved into the outwardly expanded component mounting gap (6.31) on the connecting block (6), and then the pressure head of the press is pressed on the top surface of the connecting block top plate (6.1), so that the taper plug (5) can be pressed down; When the taper plug (5) needs to be pulled up, the screw rod part of the lifting screw (7) is first screwed into the pressure head of the press, and then the pressure head of the press is driven to move the lifting screw (7) into the lifting screw mounting gap (6.11), and finally the pressure head of the press is driven to rise, so that the taper plug (5) can be pulled up.

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