Bonding tool for assembling valve core of oxygen supply system

Abstract

The utility model discloses a bonding tool for assembling a valve core of an oxygen supply system, which comprises a bottom plate, a pressing plate and a pressurizing seat, a plurality of positioning columns are arranged on the bottom plate, a bottom plate groove is arranged in the middle of the upper surface of the bottom plate, the pressing plate is positioned above the bottom plate, a plurality of pressing plate positioning through holes and a pressing plate middle through hole are arranged on the pressing plate, and the pressing plate positioning through holes are communicated with the pressing plate middle through hole. The lower face of the pressurizing base is a plane and located above the pressing plate, a plurality of pressurizing base positioning holes are formed in the lower portion of the pressurizing base, a pressurizing base middle through hole is formed in the middle of the pressurizing base, and the upper ends of the positioning columns penetrate through the pressing plate positioning through holes in one-to-one correspondence from bottom to top and then are arranged in the pressurizing base positioning holes. And the central lines of the pressing plate middle through hole and the pressurizing seat middle through hole coincide and penetrate through the central position of the bottom plate groove. According to the utility model, the function of uniformly pressurizing the sealing gasket on the valve rod through the gravity of the pressurizing seat and the positioning function of the pressing plate is realized, and high-quality pressurizing, bonding and assembling between the sealing gasket and the valve rod can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of valve manufacturing technology, specifically relating to an adhesive tooling for assembling valve cores in oxygen supply systems. Background Technology

[0002] A valve is a type of valve used to control the flow of fluid. A valve generally includes a valve seat, valve stem, and sealing gasket. It is mainly used in applications where automatic on / off control is achieved based on changes in air pressure. For example, in an oxygen supply system, it is necessary to control the opening and closing of the oxygen channel and the oxygen concentration based on factors such as the breathing movements of the person receiving oxygen and the oxygen concentration. A lung valve is often used to achieve automated control in this case.

[0003] The valve stem and the sealing gasket installed on the valve stem are important valve components. When assembled, they are generally referred to as the valve core. Figure 1 As shown, a lung-type valve core (generally made of silicone rubber) includes a valve stem 1 and a sealing gasket 3. One end of the valve stem 1 has an enlarged outer diameter to form a blocking end 2. The blocking end 2 has an annular groove, and the annular sealing gasket 3 is installed in the annular groove. In use, the valve stem 1 passes through the central through hole of the valve seat (not shown in the figure). When the sealing gasket 3 is in close contact with the end face of the valve seat, the valve is in the closed state; otherwise, it is in the open state.

[0004] To prevent air leakage when the valve is closed, the sealing gasket 3 needs to have high precision flatness. The flatness of the valve rod 1 and the sealing gasket 3 themselves can be guaranteed by machining precision, while the flatness of the sealing gasket 3 after the two are assembled also needs to be guaranteed by the bonding quality between the two.

[0005] The traditional bonding method between the valve stem 1 and the sealing gasket 3 generally uses manual assembly and simple pressure holding. That is, firstly, adhesive is applied to the annular groove of the blocking end 2 and the sealing gasket 3, then the sealing gasket 3 is placed in the annular groove of the blocking end 2, and then the sealing gasket 3 is pressed down manually or with a simple presser for a certain period of time until the adhesive solidifies, thus completing the assembly. This bonding method has the problem of uneven pressure at different positions on the sealing gasket 3, which will result in low flatness accuracy of the final formed valve core. That is, the outer surface of the sealing gasket 3 itself is not flat enough or its perpendicularity to the axis of the valve stem 1 is not enough. During use, it is easy to cause air leakage due to poor sealing between the sealing gasket 3 and the valve seat. Although the sealing performance can be improved by increasing the pressure of the valve stem 1, for a lung valve used to control the oxygen supply or oxygen concentration, increasing the pressure of the valve stem 1 will greatly increase the inhalation resistance of the oxygen user, so this method cannot solve the problem. Utility Model Content

[0006] The utility model discloses a purpose in at in order to solve above -mentioned problem and provide a kind of for oxygen supply system valve core assembly's bonding tool that uniform pressure is applied, flatness is high after bonding.

[0007] The utility model discloses the above-mentioned purposes are realized by the following technical solutions:

[0008] A kind of for oxygen supply system valve core assembly's bonding tool, the valve core includes valve stem and sealing pad, the outer diameter of the one end of the valve stem increases and forms blocking end portion, the blocking end portion is equipped with a circular annular groove and circular annular the sealing pad is installed in the circular annular groove, the bonding tool for oxygen supply system valve core assembly includes bottom plate, pressing plate and pressurizing seat, the top of the bottom plate of transverse is equipped with multiple positioning columns that project upwards, the top middle part of the bottom plate is equipped with the bottom plate groove for placing the blocking end portion, the pressing plate of transverse is located above the bottom plate, the pressing plate is equipped with multiple vertical pressing plate positioning through-holes, the middle part of the pressing plate is equipped with vertical and is used for the pressing plate middle part through-hole that the valve stem passes, the lower surface of the pressurizing seat is horizontal plane and is located above the pressing plate, the lower part of the pressurizing seat is equipped with multiple vertical pressurizing seat positioning holes, the middle part of the pressurizing seat is equipped with vertical and is used for the pressurizing seat middle part through-hole that the valve stem passes, the upper end of multiple positioning columns is respectively passed by one-to-one corresponding multiple pressing plate positioning through-holes from below to above and then placed in multiple pressurizing seat positioning holes, the center line of the pressing plate middle part through-hole, the center line of the pressurizing seat middle part through-hole coincide and pass the center position of the bottom plate groove.

[0009] As preferred, to concentrate and uniformly exert pressure on the upper surface of sealing pad by pressing plate and pressurizing seat to achieve better pressure bonding effect, the lower middle part of the pressing plate is equipped with the pressing plate boss that projects downwards and is cylindrical and the pressing plate middle part through-hole penetrates the pressing plate boss, the center line of the pressing plate boss passes the center position of the bottom plate groove, the lower end surface of the pressing plate boss is horizontal plane, and the outer diameter of the pressing plate boss is same with the outer diameter of the sealing pad.

[0010] As preferred, to realize reliable positioning function between bottom plate, pressing plate and pressurizing seat, the positioning column, the pressing plate positioning through-hole and the pressurizing seat positioning hole are all three and evenly distributed along circumferential direction.

[0011] As preferred, to avoid that the contact length between pressing plate middle part through-hole and valve stem is too large to affect positioning accuracy of valve stem, the upper middle section aperture of the pressing plate middle part through-hole is larger than lower section aperture.

[0012] The utility model discloses the beneficial effect lies in:

[0013] The utility model discloses a bottom plate recess is set up to the blocking end portion of valve rod one end on the bottom plate positioning installation, utilize the positioning of valve rod of pressing plate middle part through -hole and pressurizing seat middle part through -hole, utilize a plurality of positioning column, a plurality of pressing plate positioning through -hole and a plurality of pressurizing seat positioning hole to the positioning of pressing plate and pressurizing seat, finally realize the even pressure function of sealing pad on valve rod through the positioning function of pressurizing seat's gravity and pressing plate, can realize the high -quality pressure bonding assembly between sealing pad and valve rod, the flatness precision of the valve core after assembly is high, solved the problem of the air leakage caused by the sealing of valve seat not strict when using, especially applicable to the lung formula valve in oxygen supply system. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of lung formula valve's valve core assembly main view sectional view;

[0015] Figure 2 It is the stereogram of the bonding tool for the valve core assembly of oxygen supply system valve of the utility model;

[0016] Figure 3 It is the main view sectional view of the bonding tool for the valve core assembly of oxygen supply system valve of the utility model;

[0017] Figure 4 It is the main view sectional view of the bonding tool for the valve core assembly of oxygen supply system valve of the utility model application. DETAILED DESCRIPTION

[0018] The utility model will be further described in connection with the drawings:

[0019] As Figure 1 Shown, the valve core of the utility model includes valve rod 1 and sealing pad 3, and the one end outer diameter of valve rod 1 increases and forms blocking end portion 2, and blocking end portion 2 is equipped with a circular groove and circular sealing pad 3 is installed in the circular groove;As Figure 2 And Figure 3As shown in the utility model discloses the adhesive tool for oxygen supply system valve core assembly includes bottom plate 4, pressing plate 5 and pressurizing seat 6, the upper surface of horizontal bottom plate 4 is equipped with multiple upward protruding positioning column 9, the upper surface middle part of bottom plate 4 is equipped with bottom plate groove 12 for placing blocking end 2, horizontal pressing plate 5 is located above bottom plate 4, and the pressing plate 5 is equipped with multiple vertical pressing plate positioning through-hole (in the figure, is filled by positioning column 9, so it is not marked), and the middle part of pressing plate 5 is equipped with vertical and the pressing plate middle through-hole 11 for valve rod 1 to pass through, and the lower surface of pressurizing seat 6 is horizontal plane and is located above pressing plate 5, and the lower part of pressurizing seat 6 is equipped with multiple vertical pressurizing seat positioning hole 8 (can be blind hole or through hole, in the figure, is blind hole), and the middle part of pressurizing seat 6 is equipped with vertical and the pressurizing seat middle through-hole 7 for valve rod 1 to pass through, and the upper end of multiple positioning column 9 is respectively passed through one-to-one corresponding multiple pressing plate positioning through-hole from below to above and then placed in multiple pressurizing seat positioning holes 8, and the center line of pressing plate middle through-hole 11 and the center line of pressurizing seat middle through-hole 7 coincide and pass through the center position of bottom plate groove 12.

[0020] As Figure 2 And Figure 3 As shown in the utility model discloses the adhesive tool for oxygen supply system valve core assembly includes bottom plate 4, pressing plate 5 and pressurizing seat 6, the upper surface of horizontal bottom plate 4 is equipped with multiple upward protruding positioning column 9, the upper surface middle part of bottom plate 4 is equipped with bottom plate groove 12 for placing blocking end 2, horizontal pressing plate 5 is located above bottom plate 4, and the pressing plate 5 is equipped with multiple vertical pressing plate positioning through-hole (in the figure, is filled by positioning column 9, so it is not marked), and the middle part of pressing plate 5 is equipped with vertical and the pressing plate middle through-hole 11 for valve rod 1 to pass through, and the lower surface of pressurizing seat 6 is horizontal plane and is located above pressing plate 5, and the lower part of pressurizing seat 6 is equipped with multiple vertical pressurizing seat positioning hole 8 (can be blind hole or through hole, in the figure, is blind hole), and the middle part of pressurizing seat 6 is equipped with vertical and the pressurizing seat middle through-hole 7 for valve rod 1 to pass through, and the upper end of multiple positioning column 9 is respectively passed through one-to-one corresponding multiple pressing plate positioning through-hole from below to above and then placed in multiple pressurizing seat positioning holes 8, and the center line of pressing plate middle through-hole 11 and the center line of pressurizing seat middle through-hole 7 coincide and pass through the center position of bottom plate groove 12.

[0021] As Figure 3 And Figure 4As shown, when applied, first apply adhesive in the annular groove of the blocking end 2 and on the sealing gasket 3, then place the sealing gasket 3 in the annular groove of the blocking end 2 to form a pre-pressing valve core, then place the blocking end 2 of the pre-pressing valve core downward in the groove 12 of the bottom plate 4, then place the pressing plate 5 from top to bottom above the bottom plate 4, in the process, pass the three positioning columns 9 through the three positioning holes of the pressing plate, pass the upper end of the valve stem 1 of the pre-pressing valve core through the middle hole 11 of the pressing plate, and the boss 10 of the pressing plate is just above the sealing gasket 3, then place the pressing seat 6 (the size and weight of the pressing seat are determined according to actual needs, and the standard is to be able to maintain sufficient pressure on the sealing gasket 3) from top to bottom above the pressing plate 5, in the process, insert the three positioning columns 9 into the three positioning holes 8 of the pressing seat, and insert the upper end of the valve stem 1 of the pre-pressing valve core into the middle hole 7 of the pressing seat, at this time, the assembly of the tool and the pre-pressing valve core is completed, as shown in Figure 4 Then stand for a period of time (the length of time is determined according to actual needs, and the standard is to be able to reliably press the sealing gasket 3 and the blocking end 2 together), until the sealing gasket 3 and the blocking end 2 are firmly pressed together, remove the tool, and the pre-pressing valve core is obtained, which realizes high-quality press-bonding assembly between the sealing gasket 3 and the valve stem 1, has high flatness precision, solves the problem of air leakage caused by poor sealing with the valve seat during use, and is especially suitable for lung-type valves in oxygen supply systems.

[0022] The above embodiments are only preferred embodiments of the present application, and are not a limitation on the technical solutions of the present application. Any technical solutions that can be realized on the basis of the above embodiments without creative labor should be considered to fall within the protection scope of the patent of the present application.

Claims

1. An adhesive tooling for assembling a valve core in an oxygen supply system, the valve core comprising a valve stem and a sealing gasket, wherein one end of the valve stem has an enlarged outer diameter to form a blocking end, the blocking end having an annular groove in which the annular sealing gasket is installed, characterized in that: The adhesive tool for assembling the valve core of the oxygen supply system comprises a bottom plate, a pressing plate and a pressing seat, the upper surface of the transverse bottom plate is provided with a plurality of upward protruding positioning columns, the upper middle part of the bottom plate is provided with a bottom plate groove for placing the blocking end, the transverse pressing plate is located above the bottom plate, the pressing plate is provided with a plurality of vertical pressing plate positioning through holes, the middle part of the pressing plate is provided with a vertical pressing plate middle part through hole for the valve rod to pass through, the lower surface of the pressing seat is a transverse plane and is located above the pressing plate, the lower part of the pressing seat is provided with a plurality of vertical pressing seat positioning holes, the middle part of the pressing seat is provided with a vertical pressing seat middle part through hole for the valve rod to pass through, the upper ends of the plurality of positioning columns are respectively inserted into the corresponding plurality of pressing plate positioning through holes from bottom to top and then placed in the plurality of pressing seat positioning holes, the center lines of the pressing plate middle part through hole and the pressing seat middle part through hole coincide and pass through the center position of the bottom plate groove.

2. The bonding tool for the regulator core assembly of an oxygen supply system according to claim 1, characterized in that: The lower middle part of the pressing plate is provided with a downward protruding and cylindrical pressing plate boss, and the pressing plate middle part through hole penetrates the pressing plate boss, the center line of the pressing plate boss passes through the center position of the bottom plate groove, the lower end surface of the pressing plate boss is a transverse plane, and the outer diameter of the pressing plate boss is the same as the outer diameter of the sealing gasket.

3. The bonding tool for assembling a valve core of an oxygen supply system according to claim 1 or 2, characterized in that: The positioning column, the pressing plate positioning through hole and the pressing seat positioning hole are all three and are uniformly distributed in the circumferential direction.

4. The bonding tool for assembling a valve core of an oxygen supply system according to claim 1 or 2, characterized in that: The middle upper section hole diameter of the pressing plate middle part through hole is larger than the lower section hole diameter.

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