Hot assembly device for ruby valve seat and using method

Abstract

The invention discloses a ruby valve seat hot assembly device and a using method, the ruby valve seat hot assembly device comprises a press machine table, a valve seat assembly device, a positioning pin and a ruby valve seat, the valve seat assembly device is fixed on a base of the press machine table, the positioning pin is arranged in the valve seat assembly device, and a metal piece is sleeved at the end part of the positioning pin; a ruby valve seat is arranged at the end part of the positioning pin at one end sleeved with the metal piece; according to the invention, the matching device adopts a hot assembly method, so that the assembly difficulty of the ruby valve seat and the metal hole is reduced, and the possibility that the ruby valve seat is crushed is reduced; the invention provides an assembling tool which can guarantee the assembling concentricity of a valve seat and a hole to a certain degree and can also guarantee the distance from the end face of the ruby valve seat to a metal hole plate. According to the invention, the operation difficulty of assembly is reduced, and the assembly of the valve seat and the metal piece can be completed by using a common press table.

Description

Technical Field

[0001] The invention relates to the technical field of valve seat assembly devices, and in particular to a thermal assembly device for a ruby ​​valve seat and a use method thereof. Background Art

[0002] Ruby one-way ball valves are often used in cerebrospinal fluid shunts or other cerebrospinal fluid drainage devices due to their good biocompatibility and wear resistance. They are designed to drain cerebrospinal fluid to other parts in one direction and prevent cerebrospinal fluid reflux from causing adverse effects.

[0003] A set of ruby ​​one-way ball valves will be assembled in cerebrospinal fluid shunts or other cerebrospinal fluid drainage devices. As an important component in the cerebrospinal fluid shunt, the quality of its assembly is very important. The most critical part is the assembly of the valve seat of the ruby ​​one-way ball valve with the metal structural parts in the cerebrospinal fluid shunt. The assembly of the valve seat and the metal parts generally needs to meet two conditions. First, the assembly of the valve seat and the metal parts needs to have sufficient "assembly strength" and the valve seat needs to be tightly combined with the metal parts. A certain assembly force must be ensured so that the valve seat cannot easily fall off the metal parts; second, the relative position of the valve seat and the metal parts needs to be well guaranteed during assembly. The relative position relationship between the valve seat and the metal parts will affect the opening threshold of the valve.

[0004] In order to ensure a certain "assembly strength" between the valve seat and the metal part, an interference fit is usually created between the valve seat and the metal part (round hole), so that the valve seat and the metal part fit tightly. The existence of interference makes it difficult to assemble the valve seat and the metal part, which is manifested in the fact that the ruby ​​material itself is extremely hard and may cause the ruby ​​to be crushed during the assembly process. Therefore, it is very necessary to adopt reasonable assembly methods and some assembly devices. Summary of the invention

[0005] The purpose of the present invention is to provide a thermal assembly device for a ruby ​​valve seat to solve the problem in the background art that the valve seat and the metal part are interference fit, and the ruby ​​will be crushed during assembly due to the high hardness of the ruby ​​material.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A thermal assembly device for a ruby ​​valve seat comprises a press machine 10, a valve seat assembly device 20, a locating pin 30 and a ruby ​​valve seat 40. The valve seat assembly device 20 is fixed on the base of the press machine 10. The valve seat assembly device 20 is provided with a locating pin 30. The end of the locating pin 30 is sleeved with a metal part 41. The ruby ​​valve seat 40 is provided at the end of the locating pin 30 sleeved with the metal part 41.

[0008] The valve seat assembly device 20 includes a driving member 21, a base 23, a seat 24, a bracket 26, a return spring 25, a sliding platform 28 and a support spring 29. The base 23 is fixed on the seat 24, the bracket 26 is fixed on the base 23, the driving member 21 is provided on the bracket 26, the driving member 21 is provided with a return spring 25, the metal member 41 is provided on the base 23 below the bracket 26, the sliding platform 28 is provided below the positioning pin 30, and the sliding platform 28 is provided with a support spring 29. The base 24 is fixedly connected to the press table 10.

[0009] The press machine 10 is provided with a pressing rod 11, the bottom of which is directly opposite to the end of the driving member 21. A gear 13 is provided inside the press machine 10, and the gear 13 is driven by a handle 12, thereby driving the pressing rod 11. The pressing rod 11 is driven by a conventional gear rack mechanism, and the pressing rod 11 acts on the ruby ​​valve seat assembly device 20 to drive the driving rod 21 of the ruby ​​valve seat assembly device 20 to be pressed downward, and the ruby ​​valve seat 40 is pressed into the hole of the metal member 41 through the downward movement of the rod.

[0010] The base 23 is provided with a heating rod groove 42, a cover plate 27 is provided above the heating rod groove 42, and a thermocouple interface 44 is provided on the side of the base 23. A heating rod is placed in the heating rod groove 42, and a thermocouple interface 44 is reserved on the base 23. The temperature of the ruby ​​assembly device 20 can be controlled by a PID control module to ensure that the temperature after heating is not too high and affects the strength of the metal material. The thermal expansion coefficient of the ruby ​​material is much smaller than that of the metal. The base 23 can be heated by a heating rod. During this process, the diameter of the hole of the metal part 41 will expand, while the outer diameter of the ruby ​​valve seat will change very little, thereby reducing the interference, so that the ruby ​​valve seat can be smoothly assembled into the hole of the metal part 41.

[0011] The base 23 is provided with a pressing sheet 43 next to the metal part 41 to press one end of the metal part 41, and the hole on the other end of the metal part 41 is sleeved on the positioning pin 30, and the ruby ​​valve seat 40 is placed on the positioning pin 30. The lower end surface of the ruby ​​valve seat 40 contacts the axial shoulder of the positioning pin 30, and the positioning pin 30 "connects" the ruby ​​valve seat 40 and the metal part 41 in series to ensure that the coaxiality of the positioning pin 30, the ruby ​​valve seat 40, and the metal part 41 is good during assembly. Good coaxiality is conducive to pressing the ruby ​​valve seat into the hole of the metal part 41 to ensure smooth assembly.

[0012] A method for using a thermal assembly device for a ruby ​​valve seat comprises the following steps.

[0013] S1; install the metal part 41 on the base 23. One end of the metal part 41 needs to be assembled with the ruby ​​valve seat and is sleeved on the positioning pin 30, and the other end is pressed and fixed by the pressing piece 43.

[0014] S2; the ruby ​​valve seat 40 is sleeved on the end of the positioning pin 30, the lower end surface of the ruby ​​valve seat 40 contacts the shoulder of the positioning pin 30, and the press machine 10 is manually driven;

[0015] S3; the pressing rod 11 on the press machine 10 moves downward, contacts the driving rod 21, causing the driving rod 21 to move downward, and the driving rod 21 compresses the return spring 25. At the same time, the lower end surface of the driving rod 21 contacts the metal part 41. At this time, the driving rod 21 will not be able to move downward, thereby protecting the ruby ​​valve seat.

[0016] S4; after completing one assembly, release the handle of the press machine 10, and under the action of the spring, the drive rod 21 and the positioning pin 30, the sliding platform 28 will be reset; after resetting, the next installation can be started.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention utilizes a matching device and adopts a heat assembly method, thereby reducing the difficulty of assembling the ruby ​​valve seat and the metal hole and reducing the possibility of the ruby ​​valve seat being crushed.

[0019] The present invention provides an assembly tool, which can ensure the concentricity of the valve seat and the hole assembly to a certain extent, and can also ensure the distance from the end face of the ruby ​​valve seat to the metal orifice plate.

[0020] The present invention reduces the difficulty of assembly operation, and the assembly of the valve seat and the metal part can be completed by using a general press machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure diagram of the present invention is

[0022] Figure 2 This is one of the overall structural schematic diagrams of the valve seat assembly device of the present invention;

[0023] Figure 3 This is the second schematic diagram of the overall structure of the valve seat assembly device of the present invention;

[0024] Figure 4 This is a schematic diagram of the disassembled structure of the valve seat assembly device of the present invention;

[0025] Figure 5 This is the second schematic diagram of the disassembled structure of the valve seat assembly device of the present invention;

[0026] Figure 6 This is one of the schematic diagrams of the fixing structure of the positioning pin metal member of the present invention;

[0027] Figure 7 This is the second schematic diagram of the fixing structure of the positioning pin metal member of the present invention;

[0028] Figure 8 It is a schematic diagram of the fixed cross-sectional structure of the positioning pin metal member of the present invention;

[0029] Fig. 9 It is a schematic diagram of the internal structure of the press platform of the present invention.

[0030] In the figure: 10, press machine; 11, pressing rod; 12, handle; 13, gear; 20, valve seat assembly device; 21, driving rod; 23, base; 24, base; 25, return spring; 26, bracket; 27, cover plate; 28, sliding platform; 29, support spring; 30, positioning pin; 40, ruby ​​valve seat; 41, metal parts; 42, heating rod groove; 43, pressing piece; 44, thermocouple interface. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] A thermal assembly device for a ruby ​​valve seat comprises a press machine 10, a valve seat assembly device 20, a locating pin 30 and a ruby ​​valve seat 40. The valve seat assembly device 20 is fixed on the base of the press machine 10. The valve seat assembly device 20 is provided with a locating pin 30. The end of the locating pin 30 is sleeved with a metal part 41. The ruby ​​valve seat 40 is provided at the end of the locating pin 30 sleeved with the metal part 41.

[0033] The valve seat assembly device 20 includes a driving member 21, a base 23, a seat 24, a bracket 26, a return spring 25, a sliding platform 28 and a support spring 29. The base 23 is fixed on the seat 24, the bracket 26 is fixed on the base 23, the driving member 21 is provided on the bracket 26, the driving member 21 is provided with a return spring 25, the metal member 41 is provided on the base 23 below the bracket 26, the sliding platform 28 is provided below the positioning pin 30, and the sliding platform 28 is provided with a support spring 29. The base 24 is fixedly connected to the press table 10.

[0034] The press machine 10 is provided with a pressing rod 11, the bottom of which is directly opposite to the end of the driving member 21. A gear 13 is provided inside the press machine 10, and the gear 13 is driven by a handle 12, thereby driving the pressing rod 11. The pressing rod 11 is driven by a conventional gear rack mechanism, and the pressing rod 11 acts on the ruby ​​valve seat assembly device 20 to drive the driving rod 21 of the ruby ​​valve seat assembly device 20 to be pressed downward, and the ruby ​​valve seat 40 is pressed into the hole of the metal member 41 through the downward movement of the rod.

[0035] The base 23 is provided with a heating rod groove 42, a cover plate 27 is provided above the heating rod groove 42, and a thermocouple interface 44 is provided on the side of the base 23. A heating rod is placed in the heating rod groove 42, and a thermocouple interface 44 is reserved on the base 23. The temperature of the ruby ​​assembly device 20 can be controlled by a PID control module to ensure that the temperature after heating is not too high and affects the strength of the metal material. The thermal expansion coefficient of the ruby ​​material is much smaller than that of the metal. The base 23 can be heated by a heating rod. During this process, the diameter of the hole of the metal part 41 will expand, while the outer diameter of the ruby ​​valve seat will change very little, thereby reducing the interference, so that the ruby ​​valve seat can be smoothly assembled into the hole of the metal part 41.

[0036] The base 23 is provided with a pressing sheet 43 next to the metal part 41 to press one end of the metal part 41, and the hole on the other end of the metal part 41 is sleeved on the positioning pin 30, and the ruby ​​valve seat 40 is placed on the positioning pin 30. The lower end surface of the ruby ​​valve seat 40 contacts the axial shoulder of the positioning pin 30, and the positioning pin 30 "connects" the ruby ​​valve seat 40 and the metal part 41 in series to ensure that the coaxiality of the positioning pin 30, the ruby ​​valve seat 40, and the metal part 41 is good during assembly. Good coaxiality is conducive to pressing the ruby ​​valve seat into the hole of the metal part 41 to ensure smooth assembly.

[0037] A method for using a thermal assembly device for a ruby ​​valve seat comprises the following steps.

[0038] S1; install the metal part 41 on the base 23. One end of the metal part 41 needs to be assembled with the ruby ​​valve seat and is sleeved on the positioning pin 30, and the other end is pressed and fixed by the pressing piece 43.

[0039] S2; the ruby ​​valve seat 40 is sleeved on the end of the positioning pin 30, the lower end surface of the ruby ​​valve seat 40 contacts the shoulder of the positioning pin 30, and the press machine 10 is manually driven;

[0040] S3; the pressing rod 11 on the press machine 10 moves downward, contacts the driving rod 21, causing the driving rod 21 to move downward, and the driving rod 21 compresses the return spring 25. At the same time, the lower end surface of the driving rod 21 contacts the metal part 41. At this time, the driving rod 21 will not be able to move downward, thereby protecting the ruby ​​valve seat.

[0041] S4; after completing one assembly, release the handle of the press machine 10, and under the action of the spring, the drive rod 21 and the positioning pin 30, the sliding platform 28 will be reset; after resetting, the next installation can be started.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the invention and are not intended to limit the present invention. Without departing from the novel spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A thermal assembly device for a ruby ​​valve seat, characterized in that: The invention comprises a press machine (10), a valve seat assembly device (20), a positioning pin (30) and a ruby ​​valve seat (40); the valve seat assembly device (20) is fixed on the base of the press machine (10); a positioning pin (30) is arranged in the valve seat assembly device (20); a metal part (41) is sleeved on the end of the positioning pin (30); and a ruby ​​valve seat (40) is arranged on the end of the positioning pin (30) sleeved with the metal part (41).

2. The thermal assembly device of the ruby ​​valve seat according to claim 1, characterized in that: The valve seat assembly device (20) comprises a driving member (21), a base (23), a seat (24), a bracket (26), a reset spring (25), a sliding platform (28) and a support spring (29); the base (23) is fixed on the seat (24); the bracket (26) is fixed on the base (23); the driving member (21) is provided on the bracket (26); the driving member (21) is provided with a reset spring (25); the metal member (41) is provided on the base (23) below the bracket (26); a sliding platform (28) is provided below the positioning pin (30); and a support spring (29) is provided on the sliding platform (28).

3. The thermal assembly device of the ruby ​​valve seat according to claim 2, characterized in that: The press machine (10) is provided with a pressing rod (11), the bottom of which is directly opposite to the end of the driving member (21), and a gear (13) is provided inside the press machine (10), and the gear (13) is driven by a handle (12), thereby driving the pressing rod (11).

4. The thermal assembly device of the ruby ​​valve seat according to claim 2, characterized in that: The base (23) is provided with a heating rod groove (42), a cover plate (27) is provided above the heating rod groove (42), a thermocouple interface (44) is provided on the side of the base (23), and a heating rod is placed in the heating rod groove (42).

5. The thermal assembly device of the ruby ​​valve seat according to claim 2, characterized in that: The base (23) is provided with a pressing sheet (43) next to the metal part (41) to press one end of the metal part (41), and the hole on the other end of the metal part (41) is sleeved on the positioning pin (30), and the ruby ​​valve seat (40) is placed on the positioning pin (30), and the lower end surface of the ruby ​​valve seat (40) contacts the shaft shoulder of the positioning pin (30).

6. A method for using a thermal assembly device for a ruby ​​valve seat, characterized in that: The following steps are included. S1; installing the metal part (41) on the base (23); one end of the metal part (41) to be assembled with the ruby ​​valve seat is sleeved on the positioning pin (30), and the other end is pressed and fixed by the pressing piece (43); S2; the ruby ​​valve seat (40) is sleeved on the end of the positioning pin (30), the lower end surface of the ruby ​​valve seat (40) contacts the shoulder of the positioning pin (30), and the press machine (10) is manually driven; S3; the pressing rod (11) on the press machine (10) moves downward and contacts the driving rod (21), causing the driving rod (21) to move downward. The driving rod (21) compresses the return spring (25), and at the same time, the lower end surface of the driving rod (21) contacts the metal part (41). At this time, the driving rod (21) cannot move downward, thereby protecting the ruby ​​valve seat. S4; after completing one assembly, release the handle of the press machine (10), and under the action of the spring, the drive rod (21) and the positioning pin (30), the sliding platform (28) will be reset; after resetting, the next installation can be started.

Images